| #undef BLOCKMOVE |
| #define Z_WAKE |
| #undef Z_EXT_CHARS_IN_BUFFER |
| |
| /* |
| * linux/drivers/char/cyclades.c |
| * |
| * This file contains the driver for the Cyclades async multiport |
| * serial boards. |
| * |
| * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>. |
| * Modified and maintained by Marcio Saito <marcio@cyclades.com>. |
| * |
| * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com> |
| * |
| * Much of the design and some of the code came from serial.c |
| * which was copyright (C) 1991, 1992 Linus Torvalds. It was |
| * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92, |
| * and then fixed as suggested by Michael K. Johnson 12/12/92. |
| * Converted to pci probing and cleaned up by Jiri Slaby. |
| * |
| * This version supports shared IRQ's (only for PCI boards). |
| * |
| * Prevent users from opening non-existing Z ports. |
| * |
| * Revision 2.3.2.8 2000/07/06 18:14:16 ivan |
| * Fixed the PCI detection function to work properly on Alpha systems. |
| * Implemented support for TIOCSERGETLSR ioctl. |
| * Implemented full support for non-standard baud rates. |
| * |
| * Revision 2.3.2.7 2000/06/01 18:26:34 ivan |
| * Request PLX I/O region, although driver doesn't use it, to avoid |
| * problems with other drivers accessing it. |
| * Removed count for on-board buffer characters in cy_chars_in_buffer |
| * (Cyclades-Z only). |
| * |
| * Revision 2.3.2.6 2000/05/05 13:56:05 ivan |
| * Driver now reports physical instead of virtual memory addresses. |
| * Masks were added to some Cyclades-Z read accesses. |
| * Implemented workaround for PLX9050 bug that would cause a system lockup |
| * in certain systems, depending on the MMIO addresses allocated to the |
| * board. |
| * Changed the Tx interrupt programming in the CD1400 chips to boost up |
| * performance (Cyclom-Y only). |
| * Code is now compliant with the new module interface (module_[init|exit]). |
| * Make use of the PCI helper functions to access PCI resources. |
| * Did some code "housekeeping". |
| * |
| * Revision 2.3.2.5 2000/01/19 14:35:33 ivan |
| * Fixed bug in cy_set_termios on CRTSCTS flag turnoff. |
| * |
| * Revision 2.3.2.4 2000/01/17 09:19:40 ivan |
| * Fixed SMP locking in Cyclom-Y interrupt handler. |
| * |
| * Revision 2.3.2.3 1999/12/28 12:11:39 ivan |
| * Added a new cyclades_card field called nports to allow the driver to |
| * know the exact number of ports found by the Z firmware after its load; |
| * RX buffer contention prevention logic on interrupt op mode revisited |
| * (Cyclades-Z only); |
| * Revisited printk's for Z debug; |
| * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined; |
| * |
| * Revision 2.3.2.2 1999/10/01 11:27:43 ivan |
| * Fixed bug in cyz_poll that would make all ports but port 0 |
| * unable to transmit/receive data (Cyclades-Z only); |
| * Implemented logic to prevent the RX buffer from being stuck with data |
| * due to a driver / firmware race condition in interrupt op mode |
| * (Cyclades-Z only); |
| * Fixed bug in block_til_ready logic that would lead to a system crash; |
| * Revisited cy_close spinlock usage; |
| * |
| * Revision 2.3.2.1 1999/09/28 11:01:22 ivan |
| * Revisited CONFIG_PCI conditional compilation for PCI board support; |
| * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support; |
| * _Major_ cleanup on the Cyclades-Z interrupt support code / logic; |
| * Removed CTS handling from the driver -- this is now completely handled |
| * by the firmware (Cyclades-Z only); |
| * Flush RX on-board buffers on a port open (Cyclades-Z only); |
| * Fixed handling of ASYNC_SPD_* TTY flags; |
| * Module unload now unmaps all memory area allocated by ioremap; |
| * |
| * Revision 2.3.1.1 1999/07/15 16:45:53 ivan |
| * Removed CY_PROC conditional compilation; |
| * Implemented SMP-awareness for the driver; |
| * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off] |
| * functions; |
| * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs |
| * (irq=NN) as parameters (only for ISA boards); |
| * Fixed bug in set_line_char that would prevent the Cyclades-Z |
| * ports from being configured at speeds above 115.2Kbps; |
| * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control |
| * switching from working properly; |
| * The driver now only prints IRQ info for the Cyclades-Z if it's |
| * configured to work in interrupt mode; |
| * |
| * Revision 2.2.2.3 1999/06/28 11:13:29 ivan |
| * Added support for interrupt mode operation for the Z cards; |
| * Removed the driver inactivity control for the Z; |
| * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when |
| * the Z firmware is not loaded yet; |
| * Replaced the "manual" Z Tx flush buffer by a call to a FW command of |
| * same functionality; |
| * Implemented workaround for IRQ setting loss on the PCI configuration |
| * registers after a PCI bridge EEPROM reload (affects PLX9060 only); |
| * |
| * Revision 2.2.2.2 1999/05/14 17:18:15 ivan |
| * /proc entry location changed to /proc/tty/driver/cyclades; |
| * Added support to shared IRQ's (only for PCI boards); |
| * Added support for Cobalt Qube2 systems; |
| * IRQ [de]allocation scheme revisited; |
| * BREAK implementation changed in order to make use of the 'break_ctl' |
| * TTY facility; |
| * Fixed typo in TTY structure field 'driver_name'; |
| * Included a PCI bridge reset and EEPROM reload in the board |
| * initialization code (for both Y and Z series). |
| * |
| * Revision 2.2.2.1 1999/04/08 16:17:43 ivan |
| * Fixed a bug in cy_wait_until_sent that was preventing the port to be |
| * closed properly after a SIGINT; |
| * Module usage counter scheme revisited; |
| * Added support to the upcoming Y PCI boards (i.e., support to additional |
| * PCI Device ID's). |
| * |
| * Revision 2.2.1.10 1999/01/20 16:14:29 ivan |
| * Removed all unnecessary page-alignement operations in ioremap calls |
| * (ioremap is currently safe for these operations). |
| * |
| * Revision 2.2.1.9 1998/12/30 18:18:30 ivan |
| * Changed access to PLX PCI bridge registers from I/O to MMIO, in |
| * order to make PLX9050-based boards work with certain motherboards. |
| * |
| * Revision 2.2.1.8 1998/11/13 12:46:20 ivan |
| * cy_close function now resets (correctly) the tty->closing flag; |
| * JIFFIES_DIFF macro fixed. |
| * |
| * Revision 2.2.1.7 1998/09/03 12:07:28 ivan |
| * Fixed bug in cy_close function, which was not informing HW of |
| * which port should have the reception disabled before doing so; |
| * fixed Cyclom-8YoP hardware detection bug. |
| * |
| * Revision 2.2.1.6 1998/08/20 17:15:39 ivan |
| * Fixed bug in cy_close function, which causes malfunction |
| * of one of the first 4 ports when a higher port is closed |
| * (Cyclom-Y only). |
| * |
| * Revision 2.2.1.5 1998/08/10 18:10:28 ivan |
| * Fixed Cyclom-4Yo hardware detection bug. |
| * |
| * Revision 2.2.1.4 1998/08/04 11:02:50 ivan |
| * /proc/cyclades implementation with great collaboration of |
| * Marc Lewis <marc@blarg.net>; |
| * cyy_interrupt was changed to avoid occurrence of kernel oopses |
| * during PPP operation. |
| * |
| * Revision 2.2.1.3 1998/06/01 12:09:10 ivan |
| * General code review in order to comply with 2.1 kernel standards; |
| * data loss prevention for slow devices revisited (cy_wait_until_sent |
| * was created); |
| * removed conditional compilation for new/old PCI structure support |
| * (now the driver only supports the new PCI structure). |
| * |
| * Revision 2.2.1.1 1998/03/19 16:43:12 ivan |
| * added conditional compilation for new/old PCI structure support; |
| * removed kernel series (2.0.x / 2.1.x) conditional compilation. |
| * |
| * Revision 2.1.1.3 1998/03/16 18:01:12 ivan |
| * cleaned up the data loss fix; |
| * fixed XON/XOFF handling once more (Cyclades-Z); |
| * general review of the driver routines; |
| * introduction of a mechanism to prevent data loss with slow |
| * printers, by forcing a delay before closing the port. |
| * |
| * Revision 2.1.1.2 1998/02/17 16:50:00 ivan |
| * fixed detection/handling of new CD1400 in Ye boards; |
| * fixed XON/XOFF handling (Cyclades-Z); |
| * fixed data loss caused by a premature port close; |
| * introduction of a flag that holds the CD1400 version ID per port |
| * (used by the CYGETCD1400VER new ioctl). |
| * |
| * Revision 2.1.1.1 1997/12/03 17:31:19 ivan |
| * Code review for the module cleanup routine; |
| * fixed RTS and DTR status report for new CD1400's in get_modem_info; |
| * includes anonymous changes regarding signal_pending. |
| * |
| * Revision 2.1 1997/11/01 17:42:41 ivan |
| * Changes in the driver to support Alpha systems (except 8Zo V_1); |
| * BREAK fix for the Cyclades-Z boards; |
| * driver inactivity control by FW implemented; |
| * introduction of flag that allows driver to take advantage of |
| * a special CD1400 feature related to HW flow control; |
| * added support for the CD1400 rev. J (Cyclom-Y boards); |
| * introduction of ioctls to: |
| * - control the rtsdtr_inv flag (Cyclom-Y); |
| * - control the rflow flag (Cyclom-Y); |
| * - adjust the polling interval (Cyclades-Z); |
| * |
| * Revision 1.36.4.33 1997/06/27 19:00:00 ivan |
| * Fixes related to kernel version conditional |
| * compilation. |
| * |
| * Revision 1.36.4.32 1997/06/14 19:30:00 ivan |
| * Compatibility issues between kernels 2.0.x and |
| * 2.1.x (mainly related to clear_bit function). |
| * |
| * Revision 1.36.4.31 1997/06/03 15:30:00 ivan |
| * Changes to define the memory window according to the |
| * board type. |
| * |
| * Revision 1.36.4.30 1997/05/16 15:30:00 daniel |
| * Changes to support new cycladesZ boards. |
| * |
| * Revision 1.36.4.29 1997/05/12 11:30:00 daniel |
| * Merge of Bentson's and Daniel's version 1.36.4.28. |
| * Corrects bug in cy_detect_pci: check if there are more |
| * ports than the number of static structs allocated. |
| * Warning message during initialization if this driver is |
| * used with the new generation of cycladesZ boards. Those |
| * will be supported only in next release of the driver. |
| * Corrects bug in cy_detect_pci and cy_detect_isa that |
| * returned wrong number of VALID boards, when a cyclomY |
| * was found with no serial modules connected. |
| * Changes to use current (2.1.x) kernel subroutine names |
| * and created macros for compilation with 2.0.x kernel, |
| * instead of the other way around. |
| * |
| * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson |
| * Change queue_task_irq_off to queue_task_irq. |
| * The inline function queue_task_irq_off (tqueue.h) |
| * was removed from latest releases of 2.1.x kernel. |
| * Use of macro __init to mark the initialization |
| * routines, so memory can be reused. |
| * Also incorporate implementation of critical region |
| * in function cleanup_module() created by anonymous |
| * linuxer. |
| * |
| * Revision 1.36.4.28 1997/04/25 16:00:00 daniel |
| * Change to support new firmware that solves DCD problem: |
| * application could fail to receive SIGHUP signal when DCD |
| * varying too fast. |
| * |
| * Revision 1.36.4.27 1997/03/26 10:30:00 daniel |
| * Changed for support linux versions 2.1.X. |
| * Backward compatible with linux versions 2.0.X. |
| * Corrected illegal use of filler field in |
| * CH_CTRL struct. |
| * Deleted some debug messages. |
| * |
| * Revision 1.36.4.26 1997/02/27 12:00:00 daniel |
| * Included check for NULL tty pointer in cyz_poll. |
| * |
| * Revision 1.36.4.25 1997/02/26 16:28:30 bentson |
| * Bill Foster at Blarg! Online services noticed that |
| * some of the switch elements of -Z modem control |
| * lacked a closing "break;" |
| * |
| * Revision 1.36.4.24 1997/02/24 11:00:00 daniel |
| * Changed low water threshold for buffer xmit_buf |
| * |
| * Revision 1.36.4.23 1996/12/02 21:50:16 bentson |
| * Marcio provided fix to modem status fetch for -Z |
| * |
| * Revision 1.36.4.22 1996/10/28 22:41:17 bentson |
| * improve mapping of -Z control page (thanks to Steve |
| * Price <stevep@fa.tdktca.com> for help on this) |
| * |
| * Revision 1.36.4.21 1996/09/10 17:00:10 bentson |
| * shift from CPU-bound to memcopy in cyz_polling operation |
| * |
| * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson |
| * Added support to set and report higher speeds. |
| * |
| * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito |
| * Some fixes in the HW flow control for the BETA release. |
| * Don't try to register the IRQ. |
| * |
| * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson |
| * make sure "cyc" appears in all kernel messages; all soft interrupts |
| * handled by same routine; recognize out-of-band reception; comment |
| * out some diagnostic messages; leave RTS/CTS flow control to hardware; |
| * fix race condition in -Z buffer management; only -Y needs to explicitly |
| * flush chars; tidy up some startup messages; |
| * |
| * Revision 1.36.4.18 1996/07/25 18:57:31 bentson |
| * shift MOD_INC_USE_COUNT location to match |
| * serial.c; purge some diagnostic messages; |
| * |
| * Revision 1.36.4.17 1996/07/25 18:01:08 bentson |
| * enable modem status messages and fetch & process them; note |
| * time of last activity type for each port; set_line_char now |
| * supports more than line 0 and treats 0 baud correctly; |
| * get_modem_info senses rs_status; |
| * |
| * Revision 1.36.4.16 1996/07/20 08:43:15 bentson |
| * barely works--now's time to turn on |
| * more features 'til it breaks |
| * |
| * Revision 1.36.4.15 1996/07/19 22:30:06 bentson |
| * check more -Z board status; shorten boot message |
| * |
| * Revision 1.36.4.14 1996/07/19 22:20:37 bentson |
| * fix reference to ch_ctrl in startup; verify return |
| * values from cyz_issue_cmd and cyz_update_channel; |
| * more stuff to get modem control correct; |
| * |
| * Revision 1.36.4.13 1996/07/11 19:53:33 bentson |
| * more -Z stuff folded in; re-order changes to put -Z stuff |
| * after -Y stuff (to make changes clearer) |
| * |
| * Revision 1.36.4.12 1996/07/11 15:40:55 bentson |
| * Add code to poll Cyclades-Z. Add code to get & set RS-232 control. |
| * Add code to send break. Clear firmware ID word at startup (so |
| * that other code won't talk to inactive board). |
| * |
| * Revision 1.36.4.11 1996/07/09 05:28:29 bentson |
| * add code for -Z in set_line_char |
| * |
| * Revision 1.36.4.10 1996/07/08 19:28:37 bentson |
| * fold more -Z stuff (or in some cases, error messages) |
| * into driver; add text to "don't know what to do" messages. |
| * |
| * Revision 1.36.4.9 1996/07/08 18:38:38 bentson |
| * moved compile-time flags near top of file; cosmetic changes |
| * to narrow text (to allow 2-up printing); changed many declarations |
| * to "static" to limit external symbols; shuffled code order to |
| * coalesce -Y and -Z specific code, also to put internal functions |
| * in order of tty_driver structure; added code to recognize -Z |
| * ports (and for moment, do nothing or report error); add cy_startup |
| * to parse boot command line for extra base addresses for ISA probes; |
| * |
| * Revision 1.36.4.8 1996/06/25 17:40:19 bentson |
| * reorder some code, fix types of some vars (int vs. long), |
| * add cy_setup to support user declared ISA addresses |
| * |
| * Revision 1.36.4.7 1996/06/21 23:06:18 bentson |
| * dump ioctl based firmware load (it's now a user level |
| * program); ensure uninitialzed ports cannot be used |
| * |
| * Revision 1.36.4.6 1996/06/20 23:17:19 bentson |
| * rename vars and restructure some code |
| * |
| * Revision 1.36.4.5 1996/06/14 15:09:44 bentson |
| * get right status back after boot load |
| * |
| * Revision 1.36.4.4 1996/06/13 19:51:44 bentson |
| * successfully loads firmware |
| * |
| * Revision 1.36.4.3 1996/06/13 06:08:33 bentson |
| * add more of the code for the boot/load ioctls |
| * |
| * Revision 1.36.4.2 1996/06/11 21:00:51 bentson |
| * start to add Z functionality--starting with ioctl |
| * for loading firmware |
| * |
| * Revision 1.36.4.1 1996/06/10 18:03:02 bentson |
| * added code to recognize Z/PCI card at initialization; report |
| * presence, but card is not initialized (because firmware needs |
| * to be loaded) |
| * |
| * Revision 1.36.3.8 1996/06/07 16:29:00 bentson |
| * starting minor number at zero; added missing verify_area |
| * as noted by Heiko Eißfeldt <heiko@colossus.escape.de> |
| * |
| * Revision 1.36.3.7 1996/04/19 21:06:18 bentson |
| * remove unneeded boot message & fix CLOCAL hardware flow |
| * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>); |
| * remove unused diagnostic statements; minor 0 is first; |
| * |
| * Revision 1.36.3.6 1996/03/13 13:21:17 marcio |
| * The kernel function vremap (available only in later 1.3.xx kernels) |
| * allows the access to memory addresses above the RAM. This revision |
| * of the driver supports PCI boards below 1Mb (device id 0x100) and |
| * above 1Mb (device id 0x101). |
| * |
| * Revision 1.36.3.5 1996/03/07 15:20:17 bentson |
| * Some global changes to interrupt handling spilled into |
| * this driver--mostly unused arguments in system function |
| * calls. Also added change by Marcio Saito which should |
| * reduce lost interrupts at startup by fast processors. |
| * |
| * Revision 1.36.3.4 1995/11/13 20:45:10 bentson |
| * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed |
| * in 1.3.41 kernel to remove a possible race condition, extend |
| * some error messages, and let the driver run as a loadable module |
| * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a |
| * possible race condition. |
| * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing. |
| * |
| * Revision 1.36.3.3 1995/11/13 19:44:48 bentson |
| * Changes by Linus Torvalds in 1.3.33 kernel distribution |
| * required due to reordering of driver initialization. |
| * Drivers are now initialized *after* memory management. |
| * |
| * Revision 1.36.3.2 1995/09/08 22:07:14 bentson |
| * remove printk from ISR; fix typo |
| * |
| * Revision 1.36.3.1 1995/09/01 12:00:42 marcio |
| * Minor fixes in the PCI board support. PCI function calls in |
| * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan |
| * <duncan@okay.com>. "bad serial count" message removed. |
| * |
| * Revision 1.36.3 1995/08/22 09:19:42 marcio |
| * Cyclom-Y/PCI support added. Changes in the cy_init routine and |
| * board initialization. Changes in the boot messages. The driver |
| * supports up to 4 boards and 64 ports by default. |
| * |
| * Revision 1.36.1.4 1995/03/29 06:14:14 bentson |
| * disambiguate between Cyclom-16Y and Cyclom-32Ye; |
| * |
| * Revision 1.36.1.3 1995/03/23 22:15:35 bentson |
| * add missing break in modem control block in ioctl switch statement |
| * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>); |
| * |
| * Revision 1.36.1.2 1995/03/22 19:16:22 bentson |
| * make sure CTS flow control is set as soon as possible (thanks |
| * to note from David Lambert <lambert@chesapeake.rps.slb.com>); |
| * |
| * Revision 1.36.1.1 1995/03/13 15:44:43 bentson |
| * initialize defaults for receive threshold and stale data timeout; |
| * cosmetic changes; |
| * |
| * Revision 1.36 1995/03/10 23:33:53 bentson |
| * added support of chips 4-7 in 32 port Cyclom-Ye; |
| * fix cy_interrupt pointer dereference problem |
| * (Joe Portman <baron@aa.net>); |
| * give better error response if open is attempted on non-existent port |
| * (Zachariah Vaum <jchryslr@netcom.com>); |
| * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>); |
| * conditional compilation for -16Y on systems with fast, noisy bus; |
| * comment out diagnostic print function; |
| * cleaned up table of base addresses; |
| * set receiver time-out period register to correct value, |
| * set receive threshold to better default values, |
| * set chip timer to more accurate 200 Hz ticking, |
| * add code to monitor and modify receive parameters |
| * (Rik Faith <faith@cs.unc.edu> Nick Simicich |
| * <njs@scifi.emi.net>); |
| * |
| * Revision 1.35 1994/12/16 13:54:18 steffen |
| * additional patch by Marcio Saito for board detection |
| * Accidently left out in 1.34 |
| * |
| * Revision 1.34 1994/12/10 12:37:12 steffen |
| * This is the corrected version as suggested by Marcio Saito |
| * |
| * Revision 1.33 1994/12/01 22:41:18 bentson |
| * add hooks to support more high speeds directly; add tytso |
| * patch regarding CLOCAL wakeups |
| * |
| * Revision 1.32 1994/11/23 19:50:04 bentson |
| * allow direct kernel control of higher signalling rates; |
| * look for cards at additional locations |
| * |
| * Revision 1.31 1994/11/16 04:33:28 bentson |
| * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com-- |
| * a problem in chars_in_buffer has been resolved by some |
| * small changes; this should yield smoother output |
| * |
| * Revision 1.30 1994/11/16 04:28:05 bentson |
| * Fix from Corey Minyard, Internet: minyard@metronet.com, |
| * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to |
| * cy_hangup that appears to clear up much (all?) of the |
| * DTR glitches; also he's added/cleaned-up diagnostic messages |
| * |
| * Revision 1.29 1994/11/16 04:16:07 bentson |
| * add change proposed by Ralph Sims, ralphs@halcyon.com, to |
| * operate higher speeds in same way as other serial ports; |
| * add more serial ports (for up to two 16-port muxes). |
| * |
| * Revision 1.28 1994/11/04 00:13:16 root |
| * turn off diagnostic messages |
| * |
| * Revision 1.27 1994/11/03 23:46:37 root |
| * bunch of changes to bring driver into greater conformance |
| * with the serial.c driver (looking for missed fixes) |
| * |
| * Revision 1.26 1994/11/03 22:40:36 root |
| * automatic interrupt probing fixed. |
| * |
| * Revision 1.25 1994/11/03 20:17:02 root |
| * start to implement auto-irq |
| * |
| * Revision 1.24 1994/11/03 18:01:55 root |
| * still working on modem signals--trying not to drop DTR |
| * during the getty/login processes |
| * |
| * Revision 1.23 1994/11/03 17:51:36 root |
| * extend baud rate support; set receive threshold as function |
| * of baud rate; fix some problems with RTS/CTS; |
| * |
| * Revision 1.22 1994/11/02 18:05:35 root |
| * changed arguments to udelay to type long to get |
| * delays to be of correct duration |
| * |
| * Revision 1.21 1994/11/02 17:37:30 root |
| * employ udelay (after calibrating loops_per_second earlier |
| * in init/main.c) instead of using home-grown delay routines |
| * |
| * Revision 1.20 1994/11/02 03:11:38 root |
| * cy_chars_in_buffer forces a return value of 0 to let |
| * login work (don't know why it does); some functions |
| * that were returning EFAULT, now executes the code; |
| * more work on deciding when to disable xmit interrupts; |
| * |
| * Revision 1.19 1994/11/01 20:10:14 root |
| * define routine to start transmission interrupts (by enabling |
| * transmit interrupts); directly enable/disable modem interrupts; |
| * |
| * Revision 1.18 1994/11/01 18:40:45 bentson |
| * Don't always enable transmit interrupts in startup; interrupt on |
| * TxMpty instead of TxRdy to help characters get out before shutdown; |
| * restructure xmit interrupt to check for chars first and quit if |
| * none are ready to go; modem status (MXVRx) is upright, _not_ inverted |
| * (to my view); |
| * |
| * Revision 1.17 1994/10/30 04:39:45 bentson |
| * rename serial_driver and callout_driver to cy_serial_driver and |
| * cy_callout_driver to avoid linkage interference; initialize |
| * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port |
| * from cyclades_port structure; add paranoia check to cy_close; |
| * |
| * Revision 1.16 1994/10/30 01:14:33 bentson |
| * change major numbers; add some _early_ return statements; |
| * |
| * Revision 1.15 1994/10/29 06:43:15 bentson |
| * final tidying up for clean compile; enable some error reporting |
| * |
| * Revision 1.14 1994/10/28 20:30:22 Bentson |
| * lots of changes to drag the driver towards the new tty_io |
| * structures and operation. not expected to work, but may |
| * compile cleanly. |
| * |
| * Revision 1.13 1994/07/21 23:08:57 Bentson |
| * add some diagnostic cruft; support 24 lines (for testing |
| * both -8Y and -16Y cards; be more thorough in servicing all |
| * chips during interrupt; add "volatile" a few places to |
| * circumvent compiler optimizations; fix base & offset |
| * computations in block_til_ready (was causing chip 0 to |
| * stop operation) |
| * |
| * Revision 1.12 1994/07/19 16:42:11 Bentson |
| * add some hackery for kernel version 1.1.8; expand |
| * error messages; refine timing for delay loops and |
| * declare loop params volatile |
| * |
| * Revision 1.11 1994/06/11 21:53:10 bentson |
| * get use of save_car right in transmit interrupt service |
| * |
| * Revision 1.10.1.1 1994/06/11 21:31:18 bentson |
| * add some diagnostic printing; try to fix save_car stuff |
| * |
| * Revision 1.10 1994/06/11 20:36:08 bentson |
| * clean up compiler warnings |
| * |
| * Revision 1.9 1994/06/11 19:42:46 bentson |
| * added a bunch of code to support modem signalling |
| * |
| * Revision 1.8 1994/06/11 17:57:07 bentson |
| * recognize break & parity error |
| * |
| * Revision 1.7 1994/06/05 05:51:34 bentson |
| * Reorder baud table to be monotonic; add cli to CP; discard |
| * incoming characters and status if the line isn't open; start to |
| * fold code into cy_throttle; start to port get_serial_info, |
| * set_serial_info, get_modem_info, set_modem_info, and send_break |
| * from serial.c; expand cy_ioctl; relocate and expand config_setup; |
| * get flow control characters from tty struct; invalidate ports w/o |
| * hardware; |
| * |
| * Revision 1.6 1994/05/31 18:42:21 bentson |
| * add a loop-breaker in the interrupt service routine; |
| * note when port is initialized so that it can be shut |
| * down under the right conditions; receive works without |
| * any obvious errors |
| * |
| * Revision 1.5 1994/05/30 00:55:02 bentson |
| * transmit works without obvious errors |
| * |
| * Revision 1.4 1994/05/27 18:46:27 bentson |
| * incorporated more code from lib_y.c; can now print short |
| * strings under interrupt control to port zero; seems to |
| * select ports/channels/lines correctly |
| * |
| * Revision 1.3 1994/05/25 22:12:44 bentson |
| * shifting from multi-port on a card to proper multiplexor |
| * data structures; added skeletons of most routines |
| * |
| * Revision 1.2 1994/05/19 13:21:43 bentson |
| * start to crib from other sources |
| * |
| */ |
| |
| #define CY_VERSION "2.5" |
| |
| /* If you need to install more boards than NR_CARDS, change the constant |
| in the definition below. No other change is necessary to support up to |
| eight boards. Beyond that you'll have to extend cy_isa_addresses. */ |
| |
| #define NR_CARDS 4 |
| |
| /* |
| If the total number of ports is larger than NR_PORTS, change this |
| constant in the definition below. No other change is necessary to |
| support more boards/ports. */ |
| |
| #define NR_PORTS 256 |
| |
| #define ZE_V1_NPORTS 64 |
| #define ZO_V1 0 |
| #define ZO_V2 1 |
| #define ZE_V1 2 |
| |
| #define SERIAL_PARANOIA_CHECK |
| #undef CY_DEBUG_OPEN |
| #undef CY_DEBUG_THROTTLE |
| #undef CY_DEBUG_OTHER |
| #undef CY_DEBUG_IO |
| #undef CY_DEBUG_COUNT |
| #undef CY_DEBUG_DTR |
| #undef CY_DEBUG_WAIT_UNTIL_SENT |
| #undef CY_DEBUG_INTERRUPTS |
| #undef CY_16Y_HACK |
| #undef CY_ENABLE_MONITORING |
| #undef CY_PCI_DEBUG |
| |
| /* |
| * Include section |
| */ |
| #include <linux/module.h> |
| #include <linux/errno.h> |
| #include <linux/signal.h> |
| #include <linux/sched.h> |
| #include <linux/timer.h> |
| #include <linux/interrupt.h> |
| #include <linux/tty.h> |
| #include <linux/tty_flip.h> |
| #include <linux/serial.h> |
| #include <linux/major.h> |
| #include <linux/string.h> |
| #include <linux/fcntl.h> |
| #include <linux/ptrace.h> |
| #include <linux/cyclades.h> |
| #include <linux/mm.h> |
| #include <linux/ioport.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/spinlock.h> |
| #include <linux/bitops.h> |
| #include <linux/firmware.h> |
| |
| #include <asm/system.h> |
| #include <linux/io.h> |
| #include <asm/irq.h> |
| #include <linux/uaccess.h> |
| |
| #include <linux/kernel.h> |
| #include <linux/pci.h> |
| |
| #include <linux/stat.h> |
| #include <linux/proc_fs.h> |
| |
| static void cy_throttle(struct tty_struct *tty); |
| static void cy_send_xchar(struct tty_struct *tty, char ch); |
| |
| #define IS_CYC_Z(card) ((card).num_chips == (unsigned int)-1) |
| |
| #define Z_FPGA_CHECK(card) \ |
| ((readl(&((struct RUNTIME_9060 __iomem *) \ |
| ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0) |
| |
| #define ISZLOADED(card) (((ZO_V1 == readl(&((struct RUNTIME_9060 __iomem *) \ |
| ((card).ctl_addr))->mail_box_0)) || \ |
| Z_FPGA_CHECK(card)) && \ |
| (ZFIRM_ID == readl(&((struct FIRM_ID __iomem *) \ |
| ((card).base_addr+ID_ADDRESS))->signature))) |
| |
| #ifndef SERIAL_XMIT_SIZE |
| #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096)) |
| #endif |
| #define WAKEUP_CHARS 256 |
| |
| #define STD_COM_FLAGS (0) |
| |
| /* firmware stuff */ |
| #define ZL_MAX_BLOCKS 16 |
| #define DRIVER_VERSION 0x02010203 |
| #define RAM_SIZE 0x80000 |
| |
| #define Z_FPGA_LOADED(X) ((readl(&(X)->init_ctrl) & (1<<17)) != 0) |
| |
| enum zblock_type { |
| ZBLOCK_PRG = 0, |
| ZBLOCK_FPGA = 1 |
| }; |
| |
| struct zfile_header { |
| char name[64]; |
| char date[32]; |
| char aux[32]; |
| u32 n_config; |
| u32 config_offset; |
| u32 n_blocks; |
| u32 block_offset; |
| u32 reserved[9]; |
| } __attribute__ ((packed)); |
| |
| struct zfile_config { |
| char name[64]; |
| u32 mailbox; |
| u32 function; |
| u32 n_blocks; |
| u32 block_list[ZL_MAX_BLOCKS]; |
| } __attribute__ ((packed)); |
| |
| struct zfile_block { |
| u32 type; |
| u32 file_offset; |
| u32 ram_offset; |
| u32 size; |
| } __attribute__ ((packed)); |
| |
| static struct tty_driver *cy_serial_driver; |
| |
| #ifdef CONFIG_ISA |
| /* This is the address lookup table. The driver will probe for |
| Cyclom-Y/ISA boards at all addresses in here. If you want the |
| driver to probe addresses at a different address, add it to |
| this table. If the driver is probing some other board and |
| causing problems, remove the offending address from this table. |
| */ |
| |
| static unsigned int cy_isa_addresses[] = { |
| 0xD0000, |
| 0xD2000, |
| 0xD4000, |
| 0xD6000, |
| 0xD8000, |
| 0xDA000, |
| 0xDC000, |
| 0xDE000, |
| 0, 0, 0, 0, 0, 0, 0, 0 |
| }; |
| |
| #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses) |
| |
| #ifdef MODULE |
| static long maddr[NR_CARDS]; |
| static int irq[NR_CARDS]; |
| |
| module_param_array(maddr, long, NULL, 0); |
| module_param_array(irq, int, NULL, 0); |
| #endif |
| |
| #endif /* CONFIG_ISA */ |
| |
| /* This is the per-card data structure containing address, irq, number of |
| channels, etc. This driver supports a maximum of NR_CARDS cards. |
| */ |
| static struct cyclades_card cy_card[NR_CARDS]; |
| |
| static int cy_next_channel; /* next minor available */ |
| |
| /* |
| * This is used to look up the divisor speeds and the timeouts |
| * We're normally limited to 15 distinct baud rates. The extra |
| * are accessed via settings in info->port.flags. |
| * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, |
| * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, |
| * HI VHI |
| * 20 |
| */ |
| static int baud_table[] = { |
| 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, |
| 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000, |
| 230400, 0 |
| }; |
| |
| static char baud_co_25[] = { /* 25 MHz clock option table */ |
| /* value => 00 01 02 03 04 */ |
| /* divide by 8 32 128 512 2048 */ |
| 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02, |
| 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
| }; |
| |
| static char baud_bpr_25[] = { /* 25 MHz baud rate period table */ |
| 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3, |
| 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15 |
| }; |
| |
| static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */ |
| /* value => 00 01 02 03 04 */ |
| /* divide by 8 32 128 512 2048 */ |
| 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, |
| 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00 |
| }; |
| |
| static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */ |
| 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62, |
| 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32, |
| 0x21 |
| }; |
| |
| static char baud_cor3[] = { /* receive threshold */ |
| 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, |
| 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07, |
| 0x07 |
| }; |
| |
| /* |
| * The Cyclades driver implements HW flow control as any serial driver. |
| * The cyclades_port structure member rflow and the vector rflow_thr |
| * allows us to take advantage of a special feature in the CD1400 to avoid |
| * data loss even when the system interrupt latency is too high. These flags |
| * are to be used only with very special applications. Setting these flags |
| * requires the use of a special cable (DTR and RTS reversed). In the new |
| * CD1400-based boards (rev. 6.00 or later), there is no need for special |
| * cables. |
| */ |
| |
| static char rflow_thr[] = { /* rflow threshold */ |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, |
| 0x0a |
| }; |
| |
| /* The Cyclom-Ye has placed the sequential chips in non-sequential |
| * address order. This look-up table overcomes that problem. |
| */ |
| static int cy_chip_offset[] = { 0x0000, |
| 0x0400, |
| 0x0800, |
| 0x0C00, |
| 0x0200, |
| 0x0600, |
| 0x0A00, |
| 0x0E00 |
| }; |
| |
| /* PCI related definitions */ |
| |
| #ifdef CONFIG_PCI |
| static struct pci_device_id cy_pci_dev_id[] __devinitdata = { |
| /* PCI < 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, |
| /* PCI > 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, |
| /* 4Y PCI < 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, |
| /* 4Y PCI > 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, |
| /* 8Y PCI < 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, |
| /* 8Y PCI > 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, |
| /* Z PCI < 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, |
| /* Z PCI > 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, |
| { } /* end of table */ |
| }; |
| MODULE_DEVICE_TABLE(pci, cy_pci_dev_id); |
| #endif |
| |
| static void cy_start(struct tty_struct *); |
| static void set_line_char(struct cyclades_port *); |
| static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32); |
| #ifdef CONFIG_ISA |
| static unsigned detect_isa_irq(void __iomem *); |
| #endif /* CONFIG_ISA */ |
| |
| static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *); |
| |
| #ifndef CONFIG_CYZ_INTR |
| static void cyz_poll(unsigned long); |
| |
| /* The Cyclades-Z polling cycle is defined by this variable */ |
| static long cyz_polling_cycle = CZ_DEF_POLL; |
| |
| static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0); |
| |
| #else /* CONFIG_CYZ_INTR */ |
| static void cyz_rx_restart(unsigned long); |
| static struct timer_list cyz_rx_full_timer[NR_PORTS]; |
| #endif /* CONFIG_CYZ_INTR */ |
| |
| static inline int serial_paranoia_check(struct cyclades_port *info, |
| char *name, const char *routine) |
| { |
| #ifdef SERIAL_PARANOIA_CHECK |
| if (!info) { |
| printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) " |
| "in %s\n", name, routine); |
| return 1; |
| } |
| |
| if (info->magic != CYCLADES_MAGIC) { |
| printk(KERN_WARNING "cyc Warning: bad magic number for serial " |
| "struct (%s) in %s\n", name, routine); |
| return 1; |
| } |
| #endif |
| return 0; |
| } /* serial_paranoia_check */ |
| |
| /***********************************************************/ |
| /********* Start of block of Cyclom-Y specific code ********/ |
| |
| /* This routine waits up to 1000 micro-seconds for the previous |
| command to the Cirrus chip to complete and then issues the |
| new command. An error is returned if the previous command |
| didn't finish within the time limit. |
| |
| This function is only called from inside spinlock-protected code. |
| */ |
| static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index) |
| { |
| unsigned int i; |
| |
| /* Check to see that the previous command has completed */ |
| for (i = 0; i < 100; i++) { |
| if (readb(base_addr + (CyCCR << index)) == 0) |
| break; |
| udelay(10L); |
| } |
| /* if the CCR never cleared, the previous command |
| didn't finish within the "reasonable time" */ |
| if (i == 100) |
| return -1; |
| |
| /* Issue the new command */ |
| cy_writeb(base_addr + (CyCCR << index), cmd); |
| |
| return 0; |
| } /* cyy_issue_cmd */ |
| |
| #ifdef CONFIG_ISA |
| /* ISA interrupt detection code */ |
| static unsigned detect_isa_irq(void __iomem *address) |
| { |
| int irq; |
| unsigned long irqs, flags; |
| int save_xir, save_car; |
| int index = 0; /* IRQ probing is only for ISA */ |
| |
| /* forget possible initially masked and pending IRQ */ |
| irq = probe_irq_off(probe_irq_on()); |
| |
| /* Clear interrupts on the board first */ |
| cy_writeb(address + (Cy_ClrIntr << index), 0); |
| /* Cy_ClrIntr is 0x1800 */ |
| |
| irqs = probe_irq_on(); |
| /* Wait ... */ |
| udelay(5000L); |
| |
| /* Enable the Tx interrupts on the CD1400 */ |
| local_irq_save(flags); |
| cy_writeb(address + (CyCAR << index), 0); |
| cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index); |
| |
| cy_writeb(address + (CyCAR << index), 0); |
| cy_writeb(address + (CySRER << index), |
| readb(address + (CySRER << index)) | CyTxRdy); |
| local_irq_restore(flags); |
| |
| /* Wait ... */ |
| udelay(5000L); |
| |
| /* Check which interrupt is in use */ |
| irq = probe_irq_off(irqs); |
| |
| /* Clean up */ |
| save_xir = (u_char) readb(address + (CyTIR << index)); |
| save_car = readb(address + (CyCAR << index)); |
| cy_writeb(address + (CyCAR << index), (save_xir & 0x3)); |
| cy_writeb(address + (CySRER << index), |
| readb(address + (CySRER << index)) & ~CyTxRdy); |
| cy_writeb(address + (CyTIR << index), (save_xir & 0x3f)); |
| cy_writeb(address + (CyCAR << index), (save_car)); |
| cy_writeb(address + (Cy_ClrIntr << index), 0); |
| /* Cy_ClrIntr is 0x1800 */ |
| |
| return (irq > 0) ? irq : 0; |
| } |
| #endif /* CONFIG_ISA */ |
| |
| static void cyy_chip_rx(struct cyclades_card *cinfo, int chip, |
| void __iomem *base_addr) |
| { |
| struct cyclades_port *info; |
| struct tty_struct *tty; |
| int len, index = cinfo->bus_index; |
| u8 save_xir, channel, save_car, data, char_count; |
| |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip); |
| #endif |
| /* determine the channel & change to that context */ |
| save_xir = readb(base_addr + (CyRIR << index)); |
| channel = save_xir & CyIRChannel; |
| info = &cinfo->ports[channel + chip * 4]; |
| save_car = readb(base_addr + (CyCAR << index)); |
| cy_writeb(base_addr + (CyCAR << index), save_xir); |
| |
| /* if there is nowhere to put the data, discard it */ |
| if (info->port.tty == NULL) { |
| if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) == |
| CyIVRRxEx) { /* exception */ |
| data = readb(base_addr + (CyRDSR << index)); |
| } else { /* normal character reception */ |
| char_count = readb(base_addr + (CyRDCR << index)); |
| while (char_count--) |
| data = readb(base_addr + (CyRDSR << index)); |
| } |
| goto end; |
| } |
| /* there is an open port for this data */ |
| tty = info->port.tty; |
| if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) == |
| CyIVRRxEx) { /* exception */ |
| data = readb(base_addr + (CyRDSR << index)); |
| |
| /* For statistics only */ |
| if (data & CyBREAK) |
| info->icount.brk++; |
| else if (data & CyFRAME) |
| info->icount.frame++; |
| else if (data & CyPARITY) |
| info->icount.parity++; |
| else if (data & CyOVERRUN) |
| info->icount.overrun++; |
| |
| if (data & info->ignore_status_mask) { |
| info->icount.rx++; |
| return; |
| } |
| if (tty_buffer_request_room(tty, 1)) { |
| if (data & info->read_status_mask) { |
| if (data & CyBREAK) { |
| tty_insert_flip_char(tty, |
| readb(base_addr + (CyRDSR << |
| index)), TTY_BREAK); |
| info->icount.rx++; |
| if (info->port.flags & ASYNC_SAK) |
| do_SAK(tty); |
| } else if (data & CyFRAME) { |
| tty_insert_flip_char(tty, |
| readb(base_addr + (CyRDSR << |
| index)), TTY_FRAME); |
| info->icount.rx++; |
| info->idle_stats.frame_errs++; |
| } else if (data & CyPARITY) { |
| /* Pieces of seven... */ |
| tty_insert_flip_char(tty, |
| readb(base_addr + (CyRDSR << |
| index)), TTY_PARITY); |
| info->icount.rx++; |
| info->idle_stats.parity_errs++; |
| } else if (data & CyOVERRUN) { |
| tty_insert_flip_char(tty, 0, |
| TTY_OVERRUN); |
| info->icount.rx++; |
| /* If the flip buffer itself is |
| overflowing, we still lose |
| the next incoming character. |
| */ |
| tty_insert_flip_char(tty, |
| readb(base_addr + (CyRDSR << |
| index)), TTY_FRAME); |
| info->icount.rx++; |
| info->idle_stats.overruns++; |
| /* These two conditions may imply */ |
| /* a normal read should be done. */ |
| /* } else if(data & CyTIMEOUT) { */ |
| /* } else if(data & CySPECHAR) { */ |
| } else { |
| tty_insert_flip_char(tty, 0, |
| TTY_NORMAL); |
| info->icount.rx++; |
| } |
| } else { |
| tty_insert_flip_char(tty, 0, TTY_NORMAL); |
| info->icount.rx++; |
| } |
| } else { |
| /* there was a software buffer overrun and nothing |
| * could be done about it!!! */ |
| info->icount.buf_overrun++; |
| info->idle_stats.overruns++; |
| } |
| } else { /* normal character reception */ |
| /* load # chars available from the chip */ |
| char_count = readb(base_addr + (CyRDCR << index)); |
| |
| #ifdef CY_ENABLE_MONITORING |
| ++info->mon.int_count; |
| info->mon.char_count += char_count; |
| if (char_count > info->mon.char_max) |
| info->mon.char_max = char_count; |
| info->mon.char_last = char_count; |
| #endif |
| len = tty_buffer_request_room(tty, char_count); |
| while (len--) { |
| data = readb(base_addr + (CyRDSR << index)); |
| tty_insert_flip_char(tty, data, TTY_NORMAL); |
| info->idle_stats.recv_bytes++; |
| info->icount.rx++; |
| #ifdef CY_16Y_HACK |
| udelay(10L); |
| #endif |
| } |
| info->idle_stats.recv_idle = jiffies; |
| } |
| tty_schedule_flip(tty); |
| end: |
| /* end of service */ |
| cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f); |
| cy_writeb(base_addr + (CyCAR << index), save_car); |
| } |
| |
| static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip, |
| void __iomem *base_addr) |
| { |
| struct cyclades_port *info; |
| int char_count, index = cinfo->bus_index; |
| u8 save_xir, channel, save_car, outch; |
| |
| /* Since we only get here when the transmit buffer |
| is empty, we know we can always stuff a dozen |
| characters. */ |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip); |
| #endif |
| |
| /* determine the channel & change to that context */ |
| save_xir = readb(base_addr + (CyTIR << index)); |
| channel = save_xir & CyIRChannel; |
| save_car = readb(base_addr + (CyCAR << index)); |
| cy_writeb(base_addr + (CyCAR << index), save_xir); |
| |
| /* validate the port# (as configured and open) */ |
| if (channel + chip * 4 >= cinfo->nports) { |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & ~CyTxRdy); |
| goto end; |
| } |
| info = &cinfo->ports[channel + chip * 4]; |
| if (info->port.tty == NULL) { |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & ~CyTxRdy); |
| goto end; |
| } |
| |
| /* load the on-chip space for outbound data */ |
| char_count = info->xmit_fifo_size; |
| |
| if (info->x_char) { /* send special char */ |
| outch = info->x_char; |
| cy_writeb(base_addr + (CyTDR << index), outch); |
| char_count--; |
| info->icount.tx++; |
| info->x_char = 0; |
| } |
| |
| if (info->breakon || info->breakoff) { |
| if (info->breakon) { |
| cy_writeb(base_addr + (CyTDR << index), 0); |
| cy_writeb(base_addr + (CyTDR << index), 0x81); |
| info->breakon = 0; |
| char_count -= 2; |
| } |
| if (info->breakoff) { |
| cy_writeb(base_addr + (CyTDR << index), 0); |
| cy_writeb(base_addr + (CyTDR << index), 0x83); |
| info->breakoff = 0; |
| char_count -= 2; |
| } |
| } |
| |
| while (char_count-- > 0) { |
| if (!info->xmit_cnt) { |
| if (readb(base_addr + (CySRER << index)) & CyTxMpty) { |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & |
| ~CyTxMpty); |
| } else { |
| cy_writeb(base_addr + (CySRER << index), |
| (readb(base_addr + (CySRER << index)) & |
| ~CyTxRdy) | CyTxMpty); |
| } |
| goto done; |
| } |
| if (info->port.xmit_buf == NULL) { |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & |
| ~CyTxRdy); |
| goto done; |
| } |
| if (info->port.tty->stopped || info->port.tty->hw_stopped) { |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & |
| ~CyTxRdy); |
| goto done; |
| } |
| /* Because the Embedded Transmit Commands have been enabled, |
| * we must check to see if the escape character, NULL, is being |
| * sent. If it is, we must ensure that there is room for it to |
| * be doubled in the output stream. Therefore we no longer |
| * advance the pointer when the character is fetched, but |
| * rather wait until after the check for a NULL output |
| * character. This is necessary because there may not be room |
| * for the two chars needed to send a NULL.) |
| */ |
| outch = info->port.xmit_buf[info->xmit_tail]; |
| if (outch) { |
| info->xmit_cnt--; |
| info->xmit_tail = (info->xmit_tail + 1) & |
| (SERIAL_XMIT_SIZE - 1); |
| cy_writeb(base_addr + (CyTDR << index), outch); |
| info->icount.tx++; |
| } else { |
| if (char_count > 1) { |
| info->xmit_cnt--; |
| info->xmit_tail = (info->xmit_tail + 1) & |
| (SERIAL_XMIT_SIZE - 1); |
| cy_writeb(base_addr + (CyTDR << index), outch); |
| cy_writeb(base_addr + (CyTDR << index), 0); |
| info->icount.tx++; |
| char_count--; |
| } |
| } |
| } |
| |
| done: |
| tty_wakeup(info->port.tty); |
| end: |
| /* end of service */ |
| cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f); |
| cy_writeb(base_addr + (CyCAR << index), save_car); |
| } |
| |
| static void cyy_chip_modem(struct cyclades_card *cinfo, int chip, |
| void __iomem *base_addr) |
| { |
| struct cyclades_port *info; |
| int index = cinfo->bus_index; |
| u8 save_xir, channel, save_car, mdm_change, mdm_status; |
| |
| /* determine the channel & change to that context */ |
| save_xir = readb(base_addr + (CyMIR << index)); |
| channel = save_xir & CyIRChannel; |
| info = &cinfo->ports[channel + chip * 4]; |
| save_car = readb(base_addr + (CyCAR << index)); |
| cy_writeb(base_addr + (CyCAR << index), save_xir); |
| |
| mdm_change = readb(base_addr + (CyMISR << index)); |
| mdm_status = readb(base_addr + (CyMSVR1 << index)); |
| |
| if (!info->port.tty) |
| goto end; |
| |
| if (mdm_change & CyANY_DELTA) { |
| /* For statistics only */ |
| if (mdm_change & CyDCD) |
| info->icount.dcd++; |
| if (mdm_change & CyCTS) |
| info->icount.cts++; |
| if (mdm_change & CyDSR) |
| info->icount.dsr++; |
| if (mdm_change & CyRI) |
| info->icount.rng++; |
| |
| wake_up_interruptible(&info->delta_msr_wait); |
| } |
| |
| if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) { |
| if (!(mdm_status & CyDCD)) { |
| tty_hangup(info->port.tty); |
| info->port.flags &= ~ASYNC_NORMAL_ACTIVE; |
| } |
| wake_up_interruptible(&info->port.open_wait); |
| } |
| if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) { |
| if (info->port.tty->hw_stopped) { |
| if (mdm_status & CyCTS) { |
| /* cy_start isn't used |
| because... !!! */ |
| info->port.tty->hw_stopped = 0; |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) | |
| CyTxRdy); |
| tty_wakeup(info->port.tty); |
| } |
| } else { |
| if (!(mdm_status & CyCTS)) { |
| /* cy_stop isn't used |
| because ... !!! */ |
| info->port.tty->hw_stopped = 1; |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & |
| ~CyTxRdy); |
| } |
| } |
| } |
| /* if (mdm_change & CyDSR) { |
| } |
| if (mdm_change & CyRI) { |
| }*/ |
| end: |
| /* end of service */ |
| cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f); |
| cy_writeb(base_addr + (CyCAR << index), save_car); |
| } |
| |
| /* The real interrupt service routine is called |
| whenever the card wants its hand held--chars |
| received, out buffer empty, modem change, etc. |
| */ |
| static irqreturn_t cyy_interrupt(int irq, void *dev_id) |
| { |
| int status; |
| struct cyclades_card *cinfo = dev_id; |
| void __iomem *base_addr, *card_base_addr; |
| unsigned int chip, too_many, had_work; |
| int index; |
| |
| if (unlikely(cinfo == NULL)) { |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n", |
| irq); |
| #endif |
| return IRQ_NONE; /* spurious interrupt */ |
| } |
| |
| card_base_addr = cinfo->base_addr; |
| index = cinfo->bus_index; |
| |
| /* card was not initialized yet (e.g. DEBUG_SHIRQ) */ |
| if (unlikely(card_base_addr == NULL)) |
| return IRQ_HANDLED; |
| |
| /* This loop checks all chips in the card. Make a note whenever |
| _any_ chip had some work to do, as this is considered an |
| indication that there will be more to do. Only when no chip |
| has any work does this outermost loop exit. |
| */ |
| do { |
| had_work = 0; |
| for (chip = 0; chip < cinfo->num_chips; chip++) { |
| base_addr = cinfo->base_addr + |
| (cy_chip_offset[chip] << index); |
| too_many = 0; |
| while ((status = readb(base_addr + |
| (CySVRR << index))) != 0x00) { |
| had_work++; |
| /* The purpose of the following test is to ensure that |
| no chip can monopolize the driver. This forces the |
| chips to be checked in a round-robin fashion (after |
| draining each of a bunch (1000) of characters). |
| */ |
| if (1000 < too_many++) |
| break; |
| spin_lock(&cinfo->card_lock); |
| if (status & CySRReceive) /* rx intr */ |
| cyy_chip_rx(cinfo, chip, base_addr); |
| if (status & CySRTransmit) /* tx intr */ |
| cyy_chip_tx(cinfo, chip, base_addr); |
| if (status & CySRModem) /* modem intr */ |
| cyy_chip_modem(cinfo, chip, base_addr); |
| spin_unlock(&cinfo->card_lock); |
| } |
| } |
| } while (had_work); |
| |
| /* clear interrupts */ |
| spin_lock(&cinfo->card_lock); |
| cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0); |
| /* Cy_ClrIntr is 0x1800 */ |
| spin_unlock(&cinfo->card_lock); |
| return IRQ_HANDLED; |
| } /* cyy_interrupt */ |
| |
| /***********************************************************/ |
| /********* End of block of Cyclom-Y specific code **********/ |
| /******** Start of block of Cyclades-Z specific code *******/ |
| /***********************************************************/ |
| |
| static int |
| cyz_fetch_msg(struct cyclades_card *cinfo, |
| __u32 *channel, __u8 *cmd, __u32 *param) |
| { |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| unsigned long loc_doorbell; |
| |
| firm_id = cinfo->base_addr + ID_ADDRESS; |
| if (!ISZLOADED(*cinfo)) |
| return -1; |
| zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| |
| loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *) |
| (cinfo->ctl_addr))->loc_doorbell); |
| if (loc_doorbell) { |
| *cmd = (char)(0xff & loc_doorbell); |
| *channel = readl(&board_ctrl->fwcmd_channel); |
| *param = (__u32) readl(&board_ctrl->fwcmd_param); |
| cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))-> |
| loc_doorbell, 0xffffffff); |
| return 1; |
| } |
| return 0; |
| } /* cyz_fetch_msg */ |
| |
| static int |
| cyz_issue_cmd(struct cyclades_card *cinfo, |
| __u32 channel, __u8 cmd, __u32 param) |
| { |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| __u32 __iomem *pci_doorbell; |
| unsigned int index; |
| |
| firm_id = cinfo->base_addr + ID_ADDRESS; |
| if (!ISZLOADED(*cinfo)) |
| return -1; |
| |
| zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| |
| index = 0; |
| pci_doorbell = |
| &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell; |
| while ((readl(pci_doorbell) & 0xff) != 0) { |
| if (index++ == 1000) |
| return (int)(readl(pci_doorbell) & 0xff); |
| udelay(50L); |
| } |
| cy_writel(&board_ctrl->hcmd_channel, channel); |
| cy_writel(&board_ctrl->hcmd_param, param); |
| cy_writel(pci_doorbell, (long)cmd); |
| |
| return 0; |
| } /* cyz_issue_cmd */ |
| |
| static void cyz_handle_rx(struct cyclades_port *info, |
| struct BUF_CTRL __iomem *buf_ctrl) |
| { |
| struct cyclades_card *cinfo = info->card; |
| struct tty_struct *tty = info->port.tty; |
| unsigned int char_count; |
| int len; |
| #ifdef BLOCKMOVE |
| unsigned char *buf; |
| #else |
| char data; |
| #endif |
| __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr; |
| |
| rx_get = new_rx_get = readl(&buf_ctrl->rx_get); |
| rx_put = readl(&buf_ctrl->rx_put); |
| rx_bufsize = readl(&buf_ctrl->rx_bufsize); |
| rx_bufaddr = readl(&buf_ctrl->rx_bufaddr); |
| if (rx_put >= rx_get) |
| char_count = rx_put - rx_get; |
| else |
| char_count = rx_put - rx_get + rx_bufsize; |
| |
| if (char_count) { |
| #ifdef CY_ENABLE_MONITORING |
| info->mon.int_count++; |
| info->mon.char_count += char_count; |
| if (char_count > info->mon.char_max) |
| info->mon.char_max = char_count; |
| info->mon.char_last = char_count; |
| #endif |
| if (tty == NULL) { |
| /* flush received characters */ |
| new_rx_get = (new_rx_get + char_count) & |
| (rx_bufsize - 1); |
| info->rflush_count++; |
| } else { |
| #ifdef BLOCKMOVE |
| /* we'd like to use memcpy(t, f, n) and memset(s, c, count) |
| for performance, but because of buffer boundaries, there |
| may be several steps to the operation */ |
| while (1) { |
| len = tty_prepare_flip_string(tty, &buf, |
| char_count); |
| if (!len) |
| break; |
| |
| len = min_t(unsigned int, min(len, char_count), |
| rx_bufsize - new_rx_get); |
| |
| memcpy_fromio(buf, cinfo->base_addr + |
| rx_bufaddr + new_rx_get, len); |
| |
| new_rx_get = (new_rx_get + len) & |
| (rx_bufsize - 1); |
| char_count -= len; |
| info->icount.rx += len; |
| info->idle_stats.recv_bytes += len; |
| } |
| #else |
| len = tty_buffer_request_room(tty, char_count); |
| while (len--) { |
| data = readb(cinfo->base_addr + rx_bufaddr + |
| new_rx_get); |
| new_rx_get = (new_rx_get + 1) & |
| (rx_bufsize - 1); |
| tty_insert_flip_char(tty, data, TTY_NORMAL); |
| info->idle_stats.recv_bytes++; |
| info->icount.rx++; |
| } |
| #endif |
| #ifdef CONFIG_CYZ_INTR |
| /* Recalculate the number of chars in the RX buffer and issue |
| a cmd in case it's higher than the RX high water mark */ |
| rx_put = readl(&buf_ctrl->rx_put); |
| if (rx_put >= rx_get) |
| char_count = rx_put - rx_get; |
| else |
| char_count = rx_put - rx_get + rx_bufsize; |
| if (char_count >= readl(&buf_ctrl->rx_threshold) && |
| !timer_pending(&cyz_rx_full_timer[ |
| info->line])) |
| mod_timer(&cyz_rx_full_timer[info->line], |
| jiffies + 1); |
| #endif |
| info->idle_stats.recv_idle = jiffies; |
| tty_schedule_flip(tty); |
| } |
| /* Update rx_get */ |
| cy_writel(&buf_ctrl->rx_get, new_rx_get); |
| } |
| } |
| |
| static void cyz_handle_tx(struct cyclades_port *info, |
| struct BUF_CTRL __iomem *buf_ctrl) |
| { |
| struct cyclades_card *cinfo = info->card; |
| struct tty_struct *tty = info->port.tty; |
| u8 data; |
| unsigned int char_count; |
| #ifdef BLOCKMOVE |
| int small_count; |
| #endif |
| __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr; |
| |
| if (info->xmit_cnt <= 0) /* Nothing to transmit */ |
| return; |
| |
| tx_get = readl(&buf_ctrl->tx_get); |
| tx_put = readl(&buf_ctrl->tx_put); |
| tx_bufsize = readl(&buf_ctrl->tx_bufsize); |
| tx_bufaddr = readl(&buf_ctrl->tx_bufaddr); |
| if (tx_put >= tx_get) |
| char_count = tx_get - tx_put - 1 + tx_bufsize; |
| else |
| char_count = tx_get - tx_put - 1; |
| |
| if (char_count) { |
| |
| if (tty == NULL) |
| goto ztxdone; |
| |
| if (info->x_char) { /* send special char */ |
| data = info->x_char; |
| |
| cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data); |
| tx_put = (tx_put + 1) & (tx_bufsize - 1); |
| info->x_char = 0; |
| char_count--; |
| info->icount.tx++; |
| } |
| #ifdef BLOCKMOVE |
| while (0 < (small_count = min_t(unsigned int, |
| tx_bufsize - tx_put, min_t(unsigned int, |
| (SERIAL_XMIT_SIZE - info->xmit_tail), |
| min_t(unsigned int, info->xmit_cnt, |
| char_count))))) { |
| |
| memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + |
| tx_put), |
| &info->port.xmit_buf[info->xmit_tail], |
| small_count); |
| |
| tx_put = (tx_put + small_count) & (tx_bufsize - 1); |
| char_count -= small_count; |
| info->icount.tx += small_count; |
| info->xmit_cnt -= small_count; |
| info->xmit_tail = (info->xmit_tail + small_count) & |
| (SERIAL_XMIT_SIZE - 1); |
| } |
| #else |
| while (info->xmit_cnt && char_count) { |
| data = info->port.xmit_buf[info->xmit_tail]; |
| info->xmit_cnt--; |
| info->xmit_tail = (info->xmit_tail + 1) & |
| (SERIAL_XMIT_SIZE - 1); |
| |
| cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data); |
| tx_put = (tx_put + 1) & (tx_bufsize - 1); |
| char_count--; |
| info->icount.tx++; |
| } |
| #endif |
| tty_wakeup(tty); |
| ztxdone: |
| /* Update tx_put */ |
| cy_writel(&buf_ctrl->tx_put, tx_put); |
| } |
| } |
| |
| static void cyz_handle_cmd(struct cyclades_card *cinfo) |
| { |
| struct tty_struct *tty; |
| struct cyclades_port *info; |
| static struct FIRM_ID __iomem *firm_id; |
| static struct ZFW_CTRL __iomem *zfw_ctrl; |
| static struct BOARD_CTRL __iomem *board_ctrl; |
| static struct CH_CTRL __iomem *ch_ctrl; |
| static struct BUF_CTRL __iomem *buf_ctrl; |
| __u32 channel; |
| __u8 cmd; |
| __u32 param; |
| __u32 hw_ver, fw_ver; |
| int special_count; |
| int delta_count; |
| |
| firm_id = cinfo->base_addr + ID_ADDRESS; |
| zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| fw_ver = readl(&board_ctrl->fw_version); |
| hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))-> |
| mail_box_0); |
| |
| while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) { |
| special_count = 0; |
| delta_count = 0; |
| info = &cinfo->ports[channel]; |
| tty = info->port.tty; |
| if (tty == NULL) |
| continue; |
| |
| ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]); |
| buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]); |
| |
| switch (cmd) { |
| case C_CM_PR_ERROR: |
| tty_insert_flip_char(tty, 0, TTY_PARITY); |
| info->icount.rx++; |
| special_count++; |
| break; |
| case C_CM_FR_ERROR: |
| tty_insert_flip_char(tty, 0, TTY_FRAME); |
| info->icount.rx++; |
| special_count++; |
| break; |
| case C_CM_RXBRK: |
| tty_insert_flip_char(tty, 0, TTY_BREAK); |
| info->icount.rx++; |
| special_count++; |
| break; |
| case C_CM_MDCD: |
| info->icount.dcd++; |
| delta_count++; |
| if (info->port.flags & ASYNC_CHECK_CD) { |
| if ((fw_ver > 241 ? ((u_long) param) : |
| readl(&ch_ctrl->rs_status)) & |
| C_RS_DCD) { |
| wake_up_interruptible(&info->port.open_wait); |
| } else { |
| tty_hangup(info->port.tty); |
| wake_up_interruptible(&info->port.open_wait); |
| info->port.flags &= ~ASYNC_NORMAL_ACTIVE; |
| } |
| } |
| break; |
| case C_CM_MCTS: |
| info->icount.cts++; |
| delta_count++; |
| break; |
| case C_CM_MRI: |
| info->icount.rng++; |
| delta_count++; |
| break; |
| case C_CM_MDSR: |
| info->icount.dsr++; |
| delta_count++; |
| break; |
| #ifdef Z_WAKE |
| case C_CM_IOCTLW: |
| complete(&info->shutdown_wait); |
| break; |
| #endif |
| #ifdef CONFIG_CYZ_INTR |
| case C_CM_RXHIWM: |
| case C_CM_RXNNDT: |
| case C_CM_INTBACK2: |
| /* Reception Interrupt */ |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, " |
| "port %ld\n", info->card, channel); |
| #endif |
| cyz_handle_rx(info, buf_ctrl); |
| break; |
| case C_CM_TXBEMPTY: |
| case C_CM_TXLOWWM: |
| case C_CM_INTBACK: |
| /* Transmission Interrupt */ |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, " |
| "port %ld\n", info->card, channel); |
| #endif |
| cyz_handle_tx(info, buf_ctrl); |
| break; |
| #endif /* CONFIG_CYZ_INTR */ |
| case C_CM_FATAL: |
| /* should do something with this !!! */ |
| break; |
| default: |
| break; |
| } |
| if (delta_count) |
| wake_up_interruptible(&info->delta_msr_wait); |
| if (special_count) |
| tty_schedule_flip(tty); |
| } |
| } |
| |
| #ifdef CONFIG_CYZ_INTR |
| static irqreturn_t cyz_interrupt(int irq, void *dev_id) |
| { |
| struct cyclades_card *cinfo = dev_id; |
| |
| if (unlikely(cinfo == NULL)) { |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n", |
| irq); |
| #endif |
| return IRQ_NONE; /* spurious interrupt */ |
| } |
| |
| if (unlikely(!ISZLOADED(*cinfo))) { |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyz_interrupt: board not yet loaded " |
| "(IRQ%d).\n", irq); |
| #endif |
| return IRQ_NONE; |
| } |
| |
| /* Handle the interrupts */ |
| cyz_handle_cmd(cinfo); |
| |
| return IRQ_HANDLED; |
| } /* cyz_interrupt */ |
| |
| static void cyz_rx_restart(unsigned long arg) |
| { |
| struct cyclades_port *info = (struct cyclades_port *)arg; |
| struct cyclades_card *card = info->card; |
| int retval; |
| __u32 channel = info->line - card->first_line; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n", |
| info->line, retval); |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| |
| #else /* CONFIG_CYZ_INTR */ |
| |
| static void cyz_poll(unsigned long arg) |
| { |
| struct cyclades_card *cinfo; |
| struct cyclades_port *info; |
| struct tty_struct *tty; |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| struct BUF_CTRL __iomem *buf_ctrl; |
| unsigned long expires = jiffies + HZ; |
| unsigned int port, card; |
| |
| for (card = 0; card < NR_CARDS; card++) { |
| cinfo = &cy_card[card]; |
| |
| if (!IS_CYC_Z(*cinfo)) |
| continue; |
| if (!ISZLOADED(*cinfo)) |
| continue; |
| |
| firm_id = cinfo->base_addr + ID_ADDRESS; |
| zfw_ctrl = cinfo->base_addr + |
| (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &(zfw_ctrl->board_ctrl); |
| |
| /* Skip first polling cycle to avoid racing conditions with the FW */ |
| if (!cinfo->intr_enabled) { |
| cinfo->nports = (int)readl(&board_ctrl->n_channel); |
| cinfo->intr_enabled = 1; |
| continue; |
| } |
| |
| cyz_handle_cmd(cinfo); |
| |
| for (port = 0; port < cinfo->nports; port++) { |
| info = &cinfo->ports[port]; |
| tty = info->port.tty; |
| buf_ctrl = &(zfw_ctrl->buf_ctrl[port]); |
| |
| if (!info->throttle) |
| cyz_handle_rx(info, buf_ctrl); |
| cyz_handle_tx(info, buf_ctrl); |
| } |
| /* poll every 'cyz_polling_cycle' period */ |
| expires = jiffies + cyz_polling_cycle; |
| } |
| mod_timer(&cyz_timerlist, expires); |
| } /* cyz_poll */ |
| |
| #endif /* CONFIG_CYZ_INTR */ |
| |
| /********** End of block of Cyclades-Z specific code *********/ |
| /***********************************************************/ |
| |
| /* This is called whenever a port becomes active; |
| interrupts are enabled and DTR & RTS are turned on. |
| */ |
| static int startup(struct cyclades_port *info) |
| { |
| struct cyclades_card *card; |
| unsigned long flags; |
| int retval = 0; |
| void __iomem *base_addr; |
| int chip, channel, index; |
| unsigned long page; |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| |
| page = get_zeroed_page(GFP_KERNEL); |
| if (!page) |
| return -ENOMEM; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| if (info->port.flags & ASYNC_INITIALIZED) { |
| free_page(page); |
| goto errout; |
| } |
| |
| if (!info->type) { |
| if (info->port.tty) |
| set_bit(TTY_IO_ERROR, &info->port.tty->flags); |
| free_page(page); |
| goto errout; |
| } |
| |
| if (info->port.xmit_buf) |
| free_page(page); |
| else |
| info->port.xmit_buf = (unsigned char *)page; |
| |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| set_line_char(info); |
| |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, " |
| "base_addr %p\n", |
| card, chip, channel, base_addr); |
| #endif |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| cy_writeb(base_addr + (CyCAR << index), (u_char) channel); |
| |
| cy_writeb(base_addr + (CyRTPR << index), |
| (info->default_timeout ? info->default_timeout : 0x02)); |
| /* 10ms rx timeout */ |
| |
| cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR, |
| index); |
| |
| cy_writeb(base_addr + (CyCAR << index), (u_char) channel); |
| cy_writeb(base_addr + (CyMSVR1 << index), CyRTS); |
| cy_writeb(base_addr + (CyMSVR2 << index), CyDTR); |
| |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:startup raising DTR\n"); |
| printk(KERN_DEBUG " status: 0x%x, 0x%x\n", |
| readb(base_addr + (CyMSVR1 << index)), |
| readb(base_addr + (CyMSVR2 << index))); |
| #endif |
| |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) | CyRxData); |
| info->port.flags |= ASYNC_INITIALIZED; |
| |
| if (info->port.tty) |
| clear_bit(TTY_IO_ERROR, &info->port.tty->flags); |
| info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
| info->breakon = info->breakoff = 0; |
| memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats)); |
| info->idle_stats.in_use = |
| info->idle_stats.recv_idle = |
| info->idle_stats.xmit_idle = jiffies; |
| |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| } else { |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| struct CH_CTRL __iomem *ch_ctrl; |
| |
| base_addr = card->base_addr; |
| |
| firm_id = base_addr + ID_ADDRESS; |
| if (!ISZLOADED(*card)) |
| return -ENODEV; |
| |
| zfw_ctrl = card->base_addr + |
| (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| ch_ctrl = zfw_ctrl->ch_ctrl; |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc startup Z card %d, channel %d, " |
| "base_addr %p\n", card, channel, base_addr); |
| #endif |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE); |
| #ifdef Z_WAKE |
| #ifdef CONFIG_CYZ_INTR |
| cy_writel(&ch_ctrl[channel].intr_enable, |
| C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM | |
| C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD); |
| #else |
| cy_writel(&ch_ctrl[channel].intr_enable, |
| C_IN_IOCTLW | C_IN_MDCD); |
| #endif /* CONFIG_CYZ_INTR */ |
| #else |
| #ifdef CONFIG_CYZ_INTR |
| cy_writel(&ch_ctrl[channel].intr_enable, |
| C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM | |
| C_IN_RXNNDT | C_IN_MDCD); |
| #else |
| cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD); |
| #endif /* CONFIG_CYZ_INTR */ |
| #endif /* Z_WAKE */ |
| |
| retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was " |
| "%x\n", info->line, retval); |
| } |
| |
| /* Flush RX buffers before raising DTR and RTS */ |
| retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was " |
| "%x\n", info->line, retval); |
| } |
| |
| /* set timeout !!! */ |
| /* set RTS and DTR !!! */ |
| cy_writel(&ch_ctrl[channel].rs_control, |
| readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | |
| C_RS_DTR); |
| retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was " |
| "%x\n", info->line, retval); |
| } |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:startup raising Z DTR\n"); |
| #endif |
| |
| /* enable send, recv, modem !!! */ |
| |
| info->port.flags |= ASYNC_INITIALIZED; |
| if (info->port.tty) |
| clear_bit(TTY_IO_ERROR, &info->port.tty->flags); |
| info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
| info->breakon = info->breakoff = 0; |
| memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats)); |
| info->idle_stats.in_use = |
| info->idle_stats.recv_idle = |
| info->idle_stats.xmit_idle = jiffies; |
| |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc startup done\n"); |
| #endif |
| return 0; |
| |
| errout: |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| return retval; |
| } /* startup */ |
| |
| static void start_xmit(struct cyclades_port *info) |
| { |
| struct cyclades_card *card; |
| unsigned long flags; |
| void __iomem *base_addr; |
| int chip, channel, index; |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), channel); |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) | CyTxRdy); |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } else { |
| #ifdef CONFIG_CYZ_INTR |
| int retval; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was " |
| "%x\n", info->line, retval); |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| #else /* CONFIG_CYZ_INTR */ |
| /* Don't have to do anything at this time */ |
| #endif /* CONFIG_CYZ_INTR */ |
| } |
| } /* start_xmit */ |
| |
| /* |
| * This routine shuts down a serial port; interrupts are disabled, |
| * and DTR is dropped if the hangup on close termio flag is on. |
| */ |
| static void shutdown(struct cyclades_port *info) |
| { |
| struct cyclades_card *card; |
| unsigned long flags; |
| void __iomem *base_addr; |
| int chip, channel, index; |
| |
| if (!(info->port.flags & ASYNC_INITIALIZED)) |
| return; |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, " |
| "channel %d, base_addr %p\n", |
| card, chip, channel, base_addr); |
| #endif |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| /* Clear delta_msr_wait queue to avoid mem leaks. */ |
| wake_up_interruptible(&info->delta_msr_wait); |
| |
| if (info->port.xmit_buf) { |
| unsigned char *temp; |
| temp = info->port.xmit_buf; |
| info->port.xmit_buf = NULL; |
| free_page((unsigned long)temp); |
| } |
| cy_writeb(base_addr + (CyCAR << index), (u_char) channel); |
| if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) { |
| cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS); |
| cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR); |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc shutdown dropping DTR\n"); |
| printk(KERN_DEBUG " status: 0x%x, 0x%x\n", |
| readb(base_addr + (CyMSVR1 << index)), |
| readb(base_addr + (CyMSVR2 << index))); |
| #endif |
| } |
| cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index); |
| /* it may be appropriate to clear _XMIT at |
| some later date (after testing)!!! */ |
| |
| if (info->port.tty) |
| set_bit(TTY_IO_ERROR, &info->port.tty->flags); |
| info->port.flags &= ~ASYNC_INITIALIZED; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } else { |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| struct CH_CTRL __iomem *ch_ctrl; |
| int retval; |
| |
| base_addr = card->base_addr; |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, " |
| "base_addr %p\n", card, channel, base_addr); |
| #endif |
| |
| firm_id = base_addr + ID_ADDRESS; |
| if (!ISZLOADED(*card)) |
| return; |
| |
| zfw_ctrl = card->base_addr + |
| (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| ch_ctrl = zfw_ctrl->ch_ctrl; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| if (info->port.xmit_buf) { |
| unsigned char *temp; |
| temp = info->port.xmit_buf; |
| info->port.xmit_buf = NULL; |
| free_page((unsigned long)temp); |
| } |
| |
| if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) { |
| cy_writel(&ch_ctrl[channel].rs_control, |
| (__u32)(readl(&ch_ctrl[channel].rs_control) & |
| ~(C_RS_RTS | C_RS_DTR))); |
| retval = cyz_issue_cmd(info->card, channel, |
| C_CM_IOCTLM, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR"cyc:shutdown retval on ttyC%d " |
| "was %x\n", info->line, retval); |
| } |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n"); |
| #endif |
| } |
| |
| if (info->port.tty) |
| set_bit(TTY_IO_ERROR, &info->port.tty->flags); |
| info->port.flags &= ~ASYNC_INITIALIZED; |
| |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc shutdown done\n"); |
| #endif |
| } /* shutdown */ |
| |
| /* |
| * ------------------------------------------------------------ |
| * cy_open() and friends |
| * ------------------------------------------------------------ |
| */ |
| |
| static int |
| block_til_ready(struct tty_struct *tty, struct file *filp, |
| struct cyclades_port *info) |
| { |
| DECLARE_WAITQUEUE(wait, current); |
| struct cyclades_card *cinfo; |
| unsigned long flags; |
| int chip, channel, index; |
| int retval; |
| void __iomem *base_addr; |
| |
| cinfo = info->card; |
| channel = info->line - cinfo->first_line; |
| |
| /* |
| * If the device is in the middle of being closed, then block |
| * until it's done, and then try again. |
| */ |
| if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) { |
| wait_event_interruptible(info->port.close_wait, |
| !(info->port.flags & ASYNC_CLOSING)); |
| return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; |
| } |
| |
| /* |
| * If non-blocking mode is set, then make the check up front |
| * and then exit. |
| */ |
| if ((filp->f_flags & O_NONBLOCK) || |
| (tty->flags & (1 << TTY_IO_ERROR))) { |
| info->port.flags |= ASYNC_NORMAL_ACTIVE; |
| return 0; |
| } |
| |
| /* |
| * Block waiting for the carrier detect and the line to become |
| * free (i.e., not in use by the callout). While we are in |
| * this loop, info->port.count is dropped by one, so that |
| * cy_close() knows when to free things. We restore it upon |
| * exit, either normal or abnormal. |
| */ |
| retval = 0; |
| add_wait_queue(&info->port.open_wait, &wait); |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, " |
| "count = %d\n", info->line, info->port.count); |
| #endif |
| spin_lock_irqsave(&cinfo->card_lock, flags); |
| if (!tty_hung_up_p(filp)) |
| info->port.count--; |
| spin_unlock_irqrestore(&cinfo->card_lock, flags); |
| #ifdef CY_DEBUG_COUNT |
| printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to " |
| "%d\n", current->pid, info->port.count); |
| #endif |
| info->port.blocked_open++; |
| |
| if (!IS_CYC_Z(*cinfo)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = cinfo->bus_index; |
| base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index); |
| |
| while (1) { |
| spin_lock_irqsave(&cinfo->card_lock, flags); |
| if ((tty->termios->c_cflag & CBAUD)) { |
| cy_writeb(base_addr + (CyCAR << index), |
| (u_char) channel); |
| cy_writeb(base_addr + (CyMSVR1 << index), |
| CyRTS); |
| cy_writeb(base_addr + (CyMSVR2 << index), |
| CyDTR); |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:block_til_ready raising " |
| "DTR\n"); |
| printk(KERN_DEBUG " status: 0x%x, 0x%x\n", |
| readb(base_addr + (CyMSVR1 << index)), |
| readb(base_addr + (CyMSVR2 << index))); |
| #endif |
| } |
| spin_unlock_irqrestore(&cinfo->card_lock, flags); |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| if (tty_hung_up_p(filp) || |
| !(info->port.flags & ASYNC_INITIALIZED)) { |
| retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? |
| -EAGAIN : -ERESTARTSYS); |
| break; |
| } |
| |
| spin_lock_irqsave(&cinfo->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), |
| (u_char) channel); |
| if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) || |
| (readb(base_addr + |
| (CyMSVR1 << index)) & CyDCD))) { |
| spin_unlock_irqrestore(&cinfo->card_lock, flags); |
| break; |
| } |
| spin_unlock_irqrestore(&cinfo->card_lock, flags); |
| |
| if (signal_pending(current)) { |
| retval = -ERESTARTSYS; |
| break; |
| } |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc block_til_ready blocking: " |
| "ttyC%d, count = %d\n", |
| info->line, info->port.count); |
| #endif |
| schedule(); |
| } |
| } else { |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| struct CH_CTRL __iomem *ch_ctrl; |
| |
| base_addr = cinfo->base_addr; |
| firm_id = base_addr + ID_ADDRESS; |
| if (!ISZLOADED(*cinfo)) { |
| __set_current_state(TASK_RUNNING); |
| remove_wait_queue(&info->port.open_wait, &wait); |
| return -EINVAL; |
| } |
| |
| zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr) |
| & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| ch_ctrl = zfw_ctrl->ch_ctrl; |
| |
| while (1) { |
| if ((tty->termios->c_cflag & CBAUD)) { |
| cy_writel(&ch_ctrl[channel].rs_control, |
| readl(&ch_ctrl[channel].rs_control) | |
| C_RS_RTS | C_RS_DTR); |
| retval = cyz_issue_cmd(cinfo, |
| channel, C_CM_IOCTLM, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:block_til_ready " |
| "retval on ttyC%d was %x\n", |
| info->line, retval); |
| } |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:block_til_ready raising " |
| "Z DTR\n"); |
| #endif |
| } |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| if (tty_hung_up_p(filp) || |
| !(info->port.flags & ASYNC_INITIALIZED)) { |
| retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? |
| -EAGAIN : -ERESTARTSYS); |
| break; |
| } |
| if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) || |
| (readl(&ch_ctrl[channel].rs_status) & |
| C_RS_DCD))) { |
| break; |
| } |
| if (signal_pending(current)) { |
| retval = -ERESTARTSYS; |
| break; |
| } |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc block_til_ready blocking: " |
| "ttyC%d, count = %d\n", |
| info->line, info->port.count); |
| #endif |
| schedule(); |
| } |
| } |
| __set_current_state(TASK_RUNNING); |
| remove_wait_queue(&info->port.open_wait, &wait); |
| if (!tty_hung_up_p(filp)) { |
| info->port.count++; |
| #ifdef CY_DEBUG_COUNT |
| printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing " |
| "count to %d\n", current->pid, info->port.count); |
| #endif |
| } |
| info->port.blocked_open--; |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, " |
| "count = %d\n", info->line, info->port.count); |
| #endif |
| if (retval) |
| return retval; |
| info->port.flags |= ASYNC_NORMAL_ACTIVE; |
| return 0; |
| } /* block_til_ready */ |
| |
| /* |
| * This routine is called whenever a serial port is opened. It |
| * performs the serial-specific initialization for the tty structure. |
| */ |
| static int cy_open(struct tty_struct *tty, struct file *filp) |
| { |
| struct cyclades_port *info; |
| unsigned int i, line; |
| int retval; |
| |
| line = tty->index; |
| if (tty->index < 0 || NR_PORTS <= line) |
| return -ENODEV; |
| |
| for (i = 0; i < NR_CARDS; i++) |
| if (line < cy_card[i].first_line + cy_card[i].nports && |
| line >= cy_card[i].first_line) |
| break; |
| if (i >= NR_CARDS) |
| return -ENODEV; |
| info = &cy_card[i].ports[line - cy_card[i].first_line]; |
| if (info->line < 0) |
| return -ENODEV; |
| |
| /* If the card's firmware hasn't been loaded, |
| treat it as absent from the system. This |
| will make the user pay attention. |
| */ |
| if (IS_CYC_Z(*info->card)) { |
| struct cyclades_card *cinfo = info->card; |
| struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS; |
| |
| if (!ISZLOADED(*cinfo)) { |
| if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *) |
| (cinfo->ctl_addr))->mail_box_0)) && |
| Z_FPGA_CHECK(*cinfo)) && |
| (ZFIRM_HLT == readl( |
| &firm_id->signature))) { |
| printk(KERN_ERR "cyc:Cyclades-Z Error: you " |
| "need an external power supply for " |
| "this number of ports.\nFirmware " |
| "halted.\n"); |
| } else { |
| printk(KERN_ERR "cyc:Cyclades-Z firmware not " |
| "yet loaded\n"); |
| } |
| return -ENODEV; |
| } |
| #ifdef CONFIG_CYZ_INTR |
| else { |
| /* In case this Z board is operating in interrupt mode, its |
| interrupts should be enabled as soon as the first open |
| happens to one of its ports. */ |
| if (!cinfo->intr_enabled) { |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| |
| zfw_ctrl = cinfo->base_addr + |
| (readl(&firm_id->zfwctrl_addr) & |
| 0xfffff); |
| |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| |
| /* Enable interrupts on the PLX chip */ |
| cy_writew(cinfo->ctl_addr + 0x68, |
| readw(cinfo->ctl_addr + 0x68) | 0x0900); |
| /* Enable interrupts on the FW */ |
| retval = cyz_issue_cmd(cinfo, 0, |
| C_CM_IRQ_ENBL, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:IRQ enable retval " |
| "was %x\n", retval); |
| } |
| cinfo->nports = |
| (int)readl(&board_ctrl->n_channel); |
| cinfo->intr_enabled = 1; |
| } |
| } |
| #endif /* CONFIG_CYZ_INTR */ |
| /* Make sure this Z port really exists in hardware */ |
| if (info->line > (cinfo->first_line + cinfo->nports - 1)) |
| return -ENODEV; |
| } |
| #ifdef CY_DEBUG_OTHER |
| printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line); |
| #endif |
| tty->driver_data = info; |
| info->port.tty = tty; |
| if (serial_paranoia_check(info, tty->name, "cy_open")) |
| return -ENODEV; |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line, |
| info->port.count); |
| #endif |
| info->port.count++; |
| #ifdef CY_DEBUG_COUNT |
| printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n", |
| current->pid, info->port.count); |
| #endif |
| |
| /* |
| * If the port is the middle of closing, bail out now |
| */ |
| if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) { |
| wait_event_interruptible(info->port.close_wait, |
| !(info->port.flags & ASYNC_CLOSING)); |
| return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; |
| } |
| |
| /* |
| * Start up serial port |
| */ |
| retval = startup(info); |
| if (retval) |
| return retval; |
| |
| retval = block_til_ready(tty, filp, info); |
| if (retval) { |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready " |
| "with %d\n", retval); |
| #endif |
| return retval; |
| } |
| |
| info->throttle = 0; |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc:cy_open done\n"); |
| #endif |
| return 0; |
| } /* cy_open */ |
| |
| /* |
| * cy_wait_until_sent() --- wait until the transmitter is empty |
| */ |
| static void cy_wait_until_sent(struct tty_struct *tty, int timeout) |
| { |
| struct cyclades_card *card; |
| struct cyclades_port *info = tty->driver_data; |
| void __iomem *base_addr; |
| int chip, channel, index; |
| unsigned long orig_jiffies; |
| int char_time; |
| |
| if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent")) |
| return; |
| |
| if (info->xmit_fifo_size == 0) |
| return; /* Just in case.... */ |
| |
| orig_jiffies = jiffies; |
| lock_kernel(); |
| /* |
| * Set the check interval to be 1/5 of the estimated time to |
| * send a single character, and make it at least 1. The check |
| * interval should also be less than the timeout. |
| * |
| * Note: we have to use pretty tight timings here to satisfy |
| * the NIST-PCTS. |
| */ |
| char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; |
| char_time = char_time / 5; |
| if (char_time <= 0) |
| char_time = 1; |
| if (timeout < 0) |
| timeout = 0; |
| if (timeout) |
| char_time = min(char_time, timeout); |
| /* |
| * If the transmitter hasn't cleared in twice the approximate |
| * amount of time to send the entire FIFO, it probably won't |
| * ever clear. This assumes the UART isn't doing flow |
| * control, which is currently the case. Hence, if it ever |
| * takes longer than info->timeout, this is probably due to a |
| * UART bug of some kind. So, we clamp the timeout parameter at |
| * 2*info->timeout. |
| */ |
| if (!timeout || timeout > 2 * info->timeout) |
| timeout = 2 * info->timeout; |
| #ifdef CY_DEBUG_WAIT_UNTIL_SENT |
| printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...", |
| timeout, char_time, jiffies); |
| #endif |
| card = info->card; |
| channel = (info->line) - (card->first_line); |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| while (readb(base_addr + (CySRER << index)) & CyTxRdy) { |
| #ifdef CY_DEBUG_WAIT_UNTIL_SENT |
| printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies); |
| #endif |
| if (msleep_interruptible(jiffies_to_msecs(char_time))) |
| break; |
| if (timeout && time_after(jiffies, orig_jiffies + |
| timeout)) |
| break; |
| } |
| } |
| /* Run one more char cycle */ |
| msleep_interruptible(jiffies_to_msecs(char_time * 5)); |
| unlock_kernel(); |
| #ifdef CY_DEBUG_WAIT_UNTIL_SENT |
| printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies); |
| #endif |
| } |
| |
| static void cy_flush_buffer(struct tty_struct *tty) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| struct cyclades_card *card; |
| int channel, retval; |
| unsigned long flags; |
| |
| #ifdef CY_DEBUG_IO |
| printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line); |
| #endif |
| |
| if (serial_paranoia_check(info, tty->name, "cy_flush_buffer")) |
| return; |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board |
| buffers as well */ |
| spin_lock_irqsave(&card->card_lock, flags); |
| retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d " |
| "was %x\n", info->line, retval); |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| tty_wakeup(tty); |
| } /* cy_flush_buffer */ |
| |
| |
| /* |
| * This routine is called when a particular tty device is closed. |
| */ |
| static void cy_close(struct tty_struct *tty, struct file *filp) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| struct cyclades_card *card; |
| unsigned long flags; |
| |
| #ifdef CY_DEBUG_OTHER |
| printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line); |
| #endif |
| |
| if (!info || serial_paranoia_check(info, tty->name, "cy_close")) |
| return; |
| |
| card = info->card; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| /* If the TTY is being hung up, nothing to do */ |
| if (tty_hung_up_p(filp)) { |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| return; |
| } |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line, |
| info->port.count); |
| #endif |
| if ((tty->count == 1) && (info->port.count != 1)) { |
| /* |
| * Uh, oh. tty->count is 1, which means that the tty |
| * structure will be freed. Info->count should always |
| * be one in these conditions. If it's greater than |
| * one, we've got real problems, since it means the |
| * serial port won't be shutdown. |
| */ |
| printk(KERN_ERR "cyc:cy_close: bad serial port count; " |
| "tty->count is 1, info->port.count is %d\n", info->port.count); |
| info->port.count = 1; |
| } |
| #ifdef CY_DEBUG_COUNT |
| printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n", |
| current->pid, info->port.count - 1); |
| #endif |
| if (--info->port.count < 0) { |
| #ifdef CY_DEBUG_COUNT |
| printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n"); |
| #endif |
| info->port.count = 0; |
| } |
| if (info->port.count) { |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| return; |
| } |
| info->port.flags |= ASYNC_CLOSING; |
| |
| /* |
| * Now we wait for the transmit buffer to clear; and we notify |
| * the line discipline to only process XON/XOFF characters. |
| */ |
| tty->closing = 1; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| if (info->port.closing_wait != CY_CLOSING_WAIT_NONE) |
| tty_wait_until_sent(tty, info->port.closing_wait); |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| if (!IS_CYC_Z(*card)) { |
| int channel = info->line - card->first_line; |
| int index = card->bus_index; |
| void __iomem *base_addr = card->base_addr + |
| (cy_chip_offset[channel >> 2] << index); |
| /* Stop accepting input */ |
| channel &= 0x03; |
| cy_writeb(base_addr + (CyCAR << index), (u_char) channel); |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & ~CyRxData); |
| if (info->port.flags & ASYNC_INITIALIZED) { |
| /* Waiting for on-board buffers to be empty before |
| closing the port */ |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| cy_wait_until_sent(tty, info->timeout); |
| spin_lock_irqsave(&card->card_lock, flags); |
| } |
| } else { |
| #ifdef Z_WAKE |
| /* Waiting for on-board buffers to be empty before closing |
| the port */ |
| void __iomem *base_addr = card->base_addr; |
| struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS; |
| struct ZFW_CTRL __iomem *zfw_ctrl = |
| base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl; |
| int channel = info->line - card->first_line; |
| int retval; |
| |
| if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) { |
| retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L); |
| if (retval != 0) { |
| printk(KERN_DEBUG "cyc:cy_close retval on " |
| "ttyC%d was %x\n", info->line, retval); |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| wait_for_completion_interruptible(&info->shutdown_wait); |
| spin_lock_irqsave(&card->card_lock, flags); |
| } |
| #endif |
| } |
| |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| shutdown(info); |
| cy_flush_buffer(tty); |
| tty_ldisc_flush(tty); |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| tty->closing = 0; |
| info->port.tty = NULL; |
| if (info->port.blocked_open) { |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| if (info->port.close_delay) { |
| msleep_interruptible(jiffies_to_msecs |
| (info->port.close_delay)); |
| } |
| wake_up_interruptible(&info->port.open_wait); |
| spin_lock_irqsave(&card->card_lock, flags); |
| } |
| info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); |
| wake_up_interruptible(&info->port.close_wait); |
| |
| #ifdef CY_DEBUG_OTHER |
| printk(KERN_DEBUG "cyc:cy_close done\n"); |
| #endif |
| |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } /* cy_close */ |
| |
| /* This routine gets called when tty_write has put something into |
| * the write_queue. The characters may come from user space or |
| * kernel space. |
| * |
| * This routine will return the number of characters actually |
| * accepted for writing. |
| * |
| * If the port is not already transmitting stuff, start it off by |
| * enabling interrupts. The interrupt service routine will then |
| * ensure that the characters are sent. |
| * If the port is already active, there is no need to kick it. |
| * |
| */ |
| static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| unsigned long flags; |
| int c, ret = 0; |
| |
| #ifdef CY_DEBUG_IO |
| printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line); |
| #endif |
| |
| if (serial_paranoia_check(info, tty->name, "cy_write")) |
| return 0; |
| |
| if (!info->port.xmit_buf) |
| return 0; |
| |
| spin_lock_irqsave(&info->card->card_lock, flags); |
| while (1) { |
| c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1)); |
| c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head)); |
| |
| if (c <= 0) |
| break; |
| |
| memcpy(info->port.xmit_buf + info->xmit_head, buf, c); |
| info->xmit_head = (info->xmit_head + c) & |
| (SERIAL_XMIT_SIZE - 1); |
| info->xmit_cnt += c; |
| buf += c; |
| count -= c; |
| ret += c; |
| } |
| spin_unlock_irqrestore(&info->card->card_lock, flags); |
| |
| info->idle_stats.xmit_bytes += ret; |
| info->idle_stats.xmit_idle = jiffies; |
| |
| if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) |
| start_xmit(info); |
| |
| return ret; |
| } /* cy_write */ |
| |
| /* |
| * This routine is called by the kernel to write a single |
| * character to the tty device. If the kernel uses this routine, |
| * it must call the flush_chars() routine (if defined) when it is |
| * done stuffing characters into the driver. If there is no room |
| * in the queue, the character is ignored. |
| */ |
| static int cy_put_char(struct tty_struct *tty, unsigned char ch) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| unsigned long flags; |
| |
| #ifdef CY_DEBUG_IO |
| printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line); |
| #endif |
| |
| if (serial_paranoia_check(info, tty->name, "cy_put_char")) |
| return 0; |
| |
| if (!info->port.xmit_buf) |
| return 0; |
| |
| spin_lock_irqsave(&info->card->card_lock, flags); |
| if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) { |
| spin_unlock_irqrestore(&info->card->card_lock, flags); |
| return 0; |
| } |
| |
| info->port.xmit_buf[info->xmit_head++] = ch; |
| info->xmit_head &= SERIAL_XMIT_SIZE - 1; |
| info->xmit_cnt++; |
| info->idle_stats.xmit_bytes++; |
| info->idle_stats.xmit_idle = jiffies; |
| spin_unlock_irqrestore(&info->card->card_lock, flags); |
| return 1; |
| } /* cy_put_char */ |
| |
| /* |
| * This routine is called by the kernel after it has written a |
| * series of characters to the tty device using put_char(). |
| */ |
| static void cy_flush_chars(struct tty_struct *tty) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| |
| #ifdef CY_DEBUG_IO |
| printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line); |
| #endif |
| |
| if (serial_paranoia_check(info, tty->name, "cy_flush_chars")) |
| return; |
| |
| if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || |
| !info->port.xmit_buf) |
| return; |
| |
| start_xmit(info); |
| } /* cy_flush_chars */ |
| |
| /* |
| * This routine returns the numbers of characters the tty driver |
| * will accept for queuing to be written. This number is subject |
| * to change as output buffers get emptied, or if the output flow |
| * control is activated. |
| */ |
| static int cy_write_room(struct tty_struct *tty) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| int ret; |
| |
| #ifdef CY_DEBUG_IO |
| printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line); |
| #endif |
| |
| if (serial_paranoia_check(info, tty->name, "cy_write_room")) |
| return 0; |
| ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; |
| if (ret < 0) |
| ret = 0; |
| return ret; |
| } /* cy_write_room */ |
| |
| static int cy_chars_in_buffer(struct tty_struct *tty) |
| { |
| struct cyclades_card *card; |
| struct cyclades_port *info = tty->driver_data; |
| int channel; |
| |
| if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer")) |
| return 0; |
| |
| card = info->card; |
| channel = (info->line) - (card->first_line); |
| |
| #ifdef Z_EXT_CHARS_IN_BUFFER |
| if (!IS_CYC_Z(cy_card[card])) { |
| #endif /* Z_EXT_CHARS_IN_BUFFER */ |
| #ifdef CY_DEBUG_IO |
| printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n", |
| info->line, info->xmit_cnt); |
| #endif |
| return info->xmit_cnt; |
| #ifdef Z_EXT_CHARS_IN_BUFFER |
| } else { |
| static struct FIRM_ID *firm_id; |
| static struct ZFW_CTRL *zfw_ctrl; |
| static struct CH_CTRL *ch_ctrl; |
| static struct BUF_CTRL *buf_ctrl; |
| int char_count; |
| __u32 tx_put, tx_get, tx_bufsize; |
| |
| lock_kernel(); |
| firm_id = card->base_addr + ID_ADDRESS; |
| zfw_ctrl = card->base_addr + |
| (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]); |
| buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]); |
| |
| tx_get = readl(&buf_ctrl->tx_get); |
| tx_put = readl(&buf_ctrl->tx_put); |
| tx_bufsize = readl(&buf_ctrl->tx_bufsize); |
| if (tx_put >= tx_get) |
| char_count = tx_put - tx_get; |
| else |
| char_count = tx_put - tx_get + tx_bufsize; |
| #ifdef CY_DEBUG_IO |
| printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n", |
| info->line, info->xmit_cnt + char_count); |
| #endif |
| unlock_kernel(); |
| return info->xmit_cnt + char_count; |
| } |
| #endif /* Z_EXT_CHARS_IN_BUFFER */ |
| } /* cy_chars_in_buffer */ |
| |
| /* |
| * ------------------------------------------------------------ |
| * cy_ioctl() and friends |
| * ------------------------------------------------------------ |
| */ |
| |
| static void cyy_baud_calc(struct cyclades_port *info, __u32 baud) |
| { |
| int co, co_val, bpr; |
| __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 : |
| 25000000); |
| |
| if (baud == 0) { |
| info->tbpr = info->tco = info->rbpr = info->rco = 0; |
| return; |
| } |
| |
| /* determine which prescaler to use */ |
| for (co = 4, co_val = 2048; co; co--, co_val >>= 2) { |
| if (cy_clock / co_val / baud > 63) |
| break; |
| } |
| |
| bpr = (cy_clock / co_val * 2 / baud + 1) / 2; |
| if (bpr > 255) |
| bpr = 255; |
| |
| info->tbpr = info->rbpr = bpr; |
| info->tco = info->rco = co; |
| } |
| |
| /* |
| * This routine finds or computes the various line characteristics. |
| * It used to be called config_setup |
| */ |
| static void set_line_char(struct cyclades_port *info) |
| { |
| struct cyclades_card *card; |
| unsigned long flags; |
| void __iomem *base_addr; |
| int chip, channel, index; |
| unsigned cflag, iflag; |
| unsigned short chip_number; |
| int baud, baud_rate = 0; |
| int i; |
| |
| if (!info->port.tty || !info->port.tty->termios) |
| return; |
| |
| if (info->line == -1) |
| return; |
| |
| cflag = info->port.tty->termios->c_cflag; |
| iflag = info->port.tty->termios->c_iflag; |
| |
| /* |
| * Set up the tty->alt_speed kludge |
| */ |
| if (info->port.tty) { |
| if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| info->port.tty->alt_speed = 57600; |
| if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| info->port.tty->alt_speed = 115200; |
| if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
| info->port.tty->alt_speed = 230400; |
| if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
| info->port.tty->alt_speed = 460800; |
| } |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| chip_number = channel / 4; |
| |
| if (!IS_CYC_Z(*card)) { |
| |
| index = card->bus_index; |
| |
| /* baud rate */ |
| baud = tty_get_baud_rate(info->port.tty); |
| if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == |
| ASYNC_SPD_CUST) { |
| if (info->custom_divisor) |
| baud_rate = info->baud / info->custom_divisor; |
| else |
| baud_rate = info->baud; |
| } else if (baud > CD1400_MAX_SPEED) { |
| baud = CD1400_MAX_SPEED; |
| } |
| /* find the baud index */ |
| for (i = 0; i < 20; i++) { |
| if (baud == baud_table[i]) |
| break; |
| } |
| if (i == 20) |
| i = 19; /* CD1400_MAX_SPEED */ |
| |
| if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == |
| ASYNC_SPD_CUST) { |
| cyy_baud_calc(info, baud_rate); |
| } else { |
| if (info->chip_rev >= CD1400_REV_J) { |
| /* It is a CD1400 rev. J or later */ |
| info->tbpr = baud_bpr_60[i]; /* Tx BPR */ |
| info->tco = baud_co_60[i]; /* Tx CO */ |
| info->rbpr = baud_bpr_60[i]; /* Rx BPR */ |
| info->rco = baud_co_60[i]; /* Rx CO */ |
| } else { |
| info->tbpr = baud_bpr_25[i]; /* Tx BPR */ |
| info->tco = baud_co_25[i]; /* Tx CO */ |
| info->rbpr = baud_bpr_25[i]; /* Rx BPR */ |
| info->rco = baud_co_25[i]; /* Rx CO */ |
| } |
| } |
| if (baud_table[i] == 134) { |
| /* get it right for 134.5 baud */ |
| info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) + |
| 2; |
| } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == |
| ASYNC_SPD_CUST) { |
| info->timeout = (info->xmit_fifo_size * HZ * 15 / |
| baud_rate) + 2; |
| } else if (baud_table[i]) { |
| info->timeout = (info->xmit_fifo_size * HZ * 15 / |
| baud_table[i]) + 2; |
| /* this needs to be propagated into the card info */ |
| } else { |
| info->timeout = 0; |
| } |
| /* By tradition (is it a standard?) a baud rate of zero |
| implies the line should be/has been closed. A bit |
| later in this routine such a test is performed. */ |
| |
| /* byte size and parity */ |
| info->cor5 = 0; |
| info->cor4 = 0; |
| /* receive threshold */ |
| info->cor3 = (info->default_threshold ? |
| info->default_threshold : baud_cor3[i]); |
| info->cor2 = CyETC; |
| switch (cflag & CSIZE) { |
| case CS5: |
| info->cor1 = Cy_5_BITS; |
| break; |
| case CS6: |
| info->cor1 = Cy_6_BITS; |
| break; |
| case CS7: |
| info->cor1 = Cy_7_BITS; |
| break; |
| case CS8: |
| info->cor1 = Cy_8_BITS; |
| break; |
| } |
| if (cflag & CSTOPB) |
| info->cor1 |= Cy_2_STOP; |
| |
| if (cflag & PARENB) { |
| if (cflag & PARODD) |
| info->cor1 |= CyPARITY_O; |
| else |
| info->cor1 |= CyPARITY_E; |
| } else |
| info->cor1 |= CyPARITY_NONE; |
| |
| /* CTS flow control flag */ |
| if (cflag & CRTSCTS) { |
| info->port.flags |= ASYNC_CTS_FLOW; |
| info->cor2 |= CyCtsAE; |
| } else { |
| info->port.flags &= ~ASYNC_CTS_FLOW; |
| info->cor2 &= ~CyCtsAE; |
| } |
| if (cflag & CLOCAL) |
| info->port.flags &= ~ASYNC_CHECK_CD; |
| else |
| info->port.flags |= ASYNC_CHECK_CD; |
| |
| /*********************************************** |
| The hardware option, CyRtsAO, presents RTS when |
| the chip has characters to send. Since most modems |
| use RTS as reverse (inbound) flow control, this |
| option is not used. If inbound flow control is |
| necessary, DTR can be programmed to provide the |
| appropriate signals for use with a non-standard |
| cable. Contact Marcio Saito for details. |
| ***********************************************/ |
| |
| chip = channel >> 2; |
| channel &= 0x03; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), (u_char) channel); |
| |
| /* tx and rx baud rate */ |
| |
| cy_writeb(base_addr + (CyTCOR << index), info->tco); |
| cy_writeb(base_addr + (CyTBPR << index), info->tbpr); |
| cy_writeb(base_addr + (CyRCOR << index), info->rco); |
| cy_writeb(base_addr + (CyRBPR << index), info->rbpr); |
| |
| /* set line characteristics according configuration */ |
| |
| cy_writeb(base_addr + (CySCHR1 << index), |
| START_CHAR(info->port.tty)); |
| cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->port.tty)); |
| cy_writeb(base_addr + (CyCOR1 << index), info->cor1); |
| cy_writeb(base_addr + (CyCOR2 << index), info->cor2); |
| cy_writeb(base_addr + (CyCOR3 << index), info->cor3); |
| cy_writeb(base_addr + (CyCOR4 << index), info->cor4); |
| cy_writeb(base_addr + (CyCOR5 << index), info->cor5); |
| |
| cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch | |
| CyCOR3ch, index); |
| |
| /* !!! Is this needed? */ |
| cy_writeb(base_addr + (CyCAR << index), (u_char) channel); |
| cy_writeb(base_addr + (CyRTPR << index), |
| (info->default_timeout ? info->default_timeout : 0x02)); |
| /* 10ms rx timeout */ |
| |
| if (C_CLOCAL(info->port.tty)) { |
| /* without modem intr */ |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) | CyMdmCh); |
| /* act on 1->0 modem transitions */ |
| if ((cflag & CRTSCTS) && info->rflow) { |
| cy_writeb(base_addr + (CyMCOR1 << index), |
| (CyCTS | rflow_thr[i])); |
| } else { |
| cy_writeb(base_addr + (CyMCOR1 << index), |
| CyCTS); |
| } |
| /* act on 0->1 modem transitions */ |
| cy_writeb(base_addr + (CyMCOR2 << index), CyCTS); |
| } else { |
| /* without modem intr */ |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + |
| (CySRER << index)) | CyMdmCh); |
| /* act on 1->0 modem transitions */ |
| if ((cflag & CRTSCTS) && info->rflow) { |
| cy_writeb(base_addr + (CyMCOR1 << index), |
| (CyDSR | CyCTS | CyRI | CyDCD | |
| rflow_thr[i])); |
| } else { |
| cy_writeb(base_addr + (CyMCOR1 << index), |
| CyDSR | CyCTS | CyRI | CyDCD); |
| } |
| /* act on 0->1 modem transitions */ |
| cy_writeb(base_addr + (CyMCOR2 << index), |
| CyDSR | CyCTS | CyRI | CyDCD); |
| } |
| |
| if (i == 0) { /* baud rate is zero, turn off line */ |
| if (info->rtsdtr_inv) { |
| cy_writeb(base_addr + (CyMSVR1 << index), |
| ~CyRTS); |
| } else { |
| cy_writeb(base_addr + (CyMSVR2 << index), |
| ~CyDTR); |
| } |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n"); |
| printk(KERN_DEBUG " status: 0x%x, 0x%x\n", |
| readb(base_addr + (CyMSVR1 << index)), |
| readb(base_addr + (CyMSVR2 << index))); |
| #endif |
| } else { |
| if (info->rtsdtr_inv) { |
| cy_writeb(base_addr + (CyMSVR1 << index), |
| CyRTS); |
| } else { |
| cy_writeb(base_addr + (CyMSVR2 << index), |
| CyDTR); |
| } |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:set_line_char raising DTR\n"); |
| printk(KERN_DEBUG " status: 0x%x, 0x%x\n", |
| readb(base_addr + (CyMSVR1 << index)), |
| readb(base_addr + (CyMSVR2 << index))); |
| #endif |
| } |
| |
| if (info->port.tty) |
| clear_bit(TTY_IO_ERROR, &info->port.tty->flags); |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| } else { |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| struct CH_CTRL __iomem *ch_ctrl; |
| struct BUF_CTRL __iomem *buf_ctrl; |
| __u32 sw_flow; |
| int retval; |
| |
| firm_id = card->base_addr + ID_ADDRESS; |
| if (!ISZLOADED(*card)) |
| return; |
| |
| zfw_ctrl = card->base_addr + |
| (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]); |
| buf_ctrl = &zfw_ctrl->buf_ctrl[channel]; |
| |
| /* baud rate */ |
| baud = tty_get_baud_rate(info->port.tty); |
| if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == |
| ASYNC_SPD_CUST) { |
| if (info->custom_divisor) |
| baud_rate = info->baud / info->custom_divisor; |
| else |
| baud_rate = info->baud; |
| } else if (baud > CYZ_MAX_SPEED) { |
| baud = CYZ_MAX_SPEED; |
| } |
| cy_writel(&ch_ctrl->comm_baud, baud); |
| |
| if (baud == 134) { |
| /* get it right for 134.5 baud */ |
| info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) + |
| 2; |
| } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == |
| ASYNC_SPD_CUST) { |
| info->timeout = (info->xmit_fifo_size * HZ * 15 / |
| baud_rate) + 2; |
| } else if (baud) { |
| info->timeout = (info->xmit_fifo_size * HZ * 15 / |
| baud) + 2; |
| /* this needs to be propagated into the card info */ |
| } else { |
| info->timeout = 0; |
| } |
| |
| /* byte size and parity */ |
| switch (cflag & CSIZE) { |
| case CS5: |
| cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5); |
| break; |
| case CS6: |
| cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6); |
| break; |
| case CS7: |
| cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7); |
| break; |
| case CS8: |
| cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8); |
| break; |
| } |
| if (cflag & CSTOPB) { |
| cy_writel(&ch_ctrl->comm_data_l, |
| readl(&ch_ctrl->comm_data_l) | C_DL_2STOP); |
| } else { |
| cy_writel(&ch_ctrl->comm_data_l, |
| readl(&ch_ctrl->comm_data_l) | C_DL_1STOP); |
| } |
| if (cflag & PARENB) { |
| if (cflag & PARODD) |
| cy_writel(&ch_ctrl->comm_parity, C_PR_ODD); |
| else |
| cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN); |
| } else |
| cy_writel(&ch_ctrl->comm_parity, C_PR_NONE); |
| |
| /* CTS flow control flag */ |
| if (cflag & CRTSCTS) { |
| cy_writel(&ch_ctrl->hw_flow, |
| readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS); |
| } else { |
| cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) & |
| ~(C_RS_CTS | C_RS_RTS)); |
| } |
| /* As the HW flow control is done in firmware, the driver |
| doesn't need to care about it */ |
| info->port.flags &= ~ASYNC_CTS_FLOW; |
| |
| /* XON/XOFF/XANY flow control flags */ |
| sw_flow = 0; |
| if (iflag & IXON) { |
| sw_flow |= C_FL_OXX; |
| if (iflag & IXANY) |
| sw_flow |= C_FL_OIXANY; |
| } |
| cy_writel(&ch_ctrl->sw_flow, sw_flow); |
| |
| retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:set_line_char retval on ttyC%d " |
| "was %x\n", info->line, retval); |
| } |
| |
| /* CD sensitivity */ |
| if (cflag & CLOCAL) |
| info->port.flags &= ~ASYNC_CHECK_CD; |
| else |
| info->port.flags |= ASYNC_CHECK_CD; |
| |
| if (baud == 0) { /* baud rate is zero, turn off line */ |
| cy_writel(&ch_ctrl->rs_control, |
| readl(&ch_ctrl->rs_control) & ~C_RS_DTR); |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n"); |
| #endif |
| } else { |
| cy_writel(&ch_ctrl->rs_control, |
| readl(&ch_ctrl->rs_control) | C_RS_DTR); |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n"); |
| #endif |
| } |
| |
| retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d " |
| "was %x\n", info->line, retval); |
| } |
| |
| if (info->port.tty) |
| clear_bit(TTY_IO_ERROR, &info->port.tty->flags); |
| } |
| } /* set_line_char */ |
| |
| static int |
| get_serial_info(struct cyclades_port *info, |
| struct serial_struct __user *retinfo) |
| { |
| struct serial_struct tmp; |
| struct cyclades_card *cinfo = info->card; |
| |
| if (!retinfo) |
| return -EFAULT; |
| memset(&tmp, 0, sizeof(tmp)); |
| tmp.type = info->type; |
| tmp.line = info->line; |
| tmp.port = (info->card - cy_card) * 0x100 + info->line - |
| cinfo->first_line; |
| tmp.irq = cinfo->irq; |
| tmp.flags = info->port.flags; |
| tmp.close_delay = info->port.close_delay; |
| tmp.closing_wait = info->port.closing_wait; |
| tmp.baud_base = info->baud; |
| tmp.custom_divisor = info->custom_divisor; |
| tmp.hub6 = 0; /*!!! */ |
| return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0; |
| } /* get_serial_info */ |
| |
| static int |
| set_serial_info(struct cyclades_port *info, |
| struct serial_struct __user *new_info) |
| { |
| struct serial_struct new_serial; |
| struct cyclades_port old_info; |
| |
| if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) |
| return -EFAULT; |
| old_info = *info; |
| |
| if (!capable(CAP_SYS_ADMIN)) { |
| if (new_serial.close_delay != info->port.close_delay || |
| new_serial.baud_base != info->baud || |
| (new_serial.flags & ASYNC_FLAGS & |
| ~ASYNC_USR_MASK) != |
| (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)) |
| return -EPERM; |
| info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) | |
| (new_serial.flags & ASYNC_USR_MASK); |
| info->baud = new_serial.baud_base; |
| info->custom_divisor = new_serial.custom_divisor; |
| goto check_and_exit; |
| } |
| |
| /* |
| * OK, past this point, all the error checking has been done. |
| * At this point, we start making changes..... |
| */ |
| |
| info->baud = new_serial.baud_base; |
| info->custom_divisor = new_serial.custom_divisor; |
| info->port.flags = (info->port.flags & ~ASYNC_FLAGS) | |
| (new_serial.flags & ASYNC_FLAGS); |
| info->port.close_delay = new_serial.close_delay * HZ / 100; |
| info->port.closing_wait = new_serial.closing_wait * HZ / 100; |
| |
| check_and_exit: |
| if (info->port.flags & ASYNC_INITIALIZED) { |
| set_line_char(info); |
| return 0; |
| } else { |
| return startup(info); |
| } |
| } /* set_serial_info */ |
| |
| /* |
| * get_lsr_info - get line status register info |
| * |
| * Purpose: Let user call ioctl() to get info when the UART physically |
| * is emptied. On bus types like RS485, the transmitter must |
| * release the bus after transmitting. This must be done when |
| * the transmit shift register is empty, not be done when the |
| * transmit holding register is empty. This functionality |
| * allows an RS485 driver to be written in user space. |
| */ |
| static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value) |
| { |
| struct cyclades_card *card; |
| int chip, channel, index; |
| unsigned char status; |
| unsigned int result; |
| unsigned long flags; |
| void __iomem *base_addr; |
| |
| card = info->card; |
| channel = (info->line) - (card->first_line); |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| status = readb(base_addr + (CySRER << index)) & |
| (CyTxRdy | CyTxMpty); |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| result = (status ? 0 : TIOCSER_TEMT); |
| } else { |
| /* Not supported yet */ |
| return -EINVAL; |
| } |
| return put_user(result, (unsigned long __user *)value); |
| } |
| |
| static int cy_tiocmget(struct tty_struct *tty, struct file *file) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| struct cyclades_card *card; |
| int chip, channel, index; |
| void __iomem *base_addr; |
| unsigned long flags; |
| unsigned char status; |
| unsigned long lstatus; |
| unsigned int result; |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| struct CH_CTRL __iomem *ch_ctrl; |
| |
| if (serial_paranoia_check(info, tty->name, __func__)) |
| return -ENODEV; |
| |
| lock_kernel(); |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), (u_char) channel); |
| status = readb(base_addr + (CyMSVR1 << index)); |
| status |= readb(base_addr + (CyMSVR2 << index)); |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| if (info->rtsdtr_inv) { |
| result = ((status & CyRTS) ? TIOCM_DTR : 0) | |
| ((status & CyDTR) ? TIOCM_RTS : 0); |
| } else { |
| result = ((status & CyRTS) ? TIOCM_RTS : 0) | |
| ((status & CyDTR) ? TIOCM_DTR : 0); |
| } |
| result |= ((status & CyDCD) ? TIOCM_CAR : 0) | |
| ((status & CyRI) ? TIOCM_RNG : 0) | |
| ((status & CyDSR) ? TIOCM_DSR : 0) | |
| ((status & CyCTS) ? TIOCM_CTS : 0); |
| } else { |
| base_addr = card->base_addr; |
| firm_id = card->base_addr + ID_ADDRESS; |
| if (ISZLOADED(*card)) { |
| zfw_ctrl = card->base_addr + |
| (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| ch_ctrl = zfw_ctrl->ch_ctrl; |
| lstatus = readl(&ch_ctrl[channel].rs_status); |
| result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) | |
| ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) | |
| ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) | |
| ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) | |
| ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) | |
| ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0); |
| } else { |
| result = 0; |
| unlock_kernel(); |
| return -ENODEV; |
| } |
| |
| } |
| unlock_kernel(); |
| return result; |
| } /* cy_tiomget */ |
| |
| static int |
| cy_tiocmset(struct tty_struct *tty, struct file *file, |
| unsigned int set, unsigned int clear) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| struct cyclades_card *card; |
| int chip, channel, index; |
| void __iomem *base_addr; |
| unsigned long flags; |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| struct CH_CTRL __iomem *ch_ctrl; |
| int retval; |
| |
| if (serial_paranoia_check(info, tty->name, __func__)) |
| return -ENODEV; |
| |
| card = info->card; |
| channel = (info->line) - (card->first_line); |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| |
| if (set & TIOCM_RTS) { |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), |
| (u_char) channel); |
| if (info->rtsdtr_inv) { |
| cy_writeb(base_addr + (CyMSVR2 << index), |
| CyDTR); |
| } else { |
| cy_writeb(base_addr + (CyMSVR1 << index), |
| CyRTS); |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| if (clear & TIOCM_RTS) { |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), |
| (u_char) channel); |
| if (info->rtsdtr_inv) { |
| cy_writeb(base_addr + (CyMSVR2 << index), |
| ~CyDTR); |
| } else { |
| cy_writeb(base_addr + (CyMSVR1 << index), |
| ~CyRTS); |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| if (set & TIOCM_DTR) { |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), |
| (u_char) channel); |
| if (info->rtsdtr_inv) { |
| cy_writeb(base_addr + (CyMSVR1 << index), |
| CyRTS); |
| } else { |
| cy_writeb(base_addr + (CyMSVR2 << index), |
| CyDTR); |
| } |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n"); |
| printk(KERN_DEBUG " status: 0x%x, 0x%x\n", |
| readb(base_addr + (CyMSVR1 << index)), |
| readb(base_addr + (CyMSVR2 << index))); |
| #endif |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| if (clear & TIOCM_DTR) { |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), |
| (u_char) channel); |
| if (info->rtsdtr_inv) { |
| cy_writeb(base_addr + (CyMSVR1 << index), |
| ~CyRTS); |
| } else { |
| cy_writeb(base_addr + (CyMSVR2 << index), |
| ~CyDTR); |
| } |
| |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n"); |
| printk(KERN_DEBUG " status: 0x%x, 0x%x\n", |
| readb(base_addr + (CyMSVR1 << index)), |
| readb(base_addr + (CyMSVR2 << index))); |
| #endif |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| } else { |
| base_addr = card->base_addr; |
| |
| firm_id = card->base_addr + ID_ADDRESS; |
| if (ISZLOADED(*card)) { |
| zfw_ctrl = card->base_addr + |
| (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| ch_ctrl = zfw_ctrl->ch_ctrl; |
| |
| if (set & TIOCM_RTS) { |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writel(&ch_ctrl[channel].rs_control, |
| readl(&ch_ctrl[channel].rs_control) | |
| C_RS_RTS); |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| if (clear & TIOCM_RTS) { |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writel(&ch_ctrl[channel].rs_control, |
| readl(&ch_ctrl[channel].rs_control) & |
| ~C_RS_RTS); |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| if (set & TIOCM_DTR) { |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writel(&ch_ctrl[channel].rs_control, |
| readl(&ch_ctrl[channel].rs_control) | |
| C_RS_DTR); |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:set_modem_info raising " |
| "Z DTR\n"); |
| #endif |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| if (clear & TIOCM_DTR) { |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writel(&ch_ctrl[channel].rs_control, |
| readl(&ch_ctrl[channel].rs_control) & |
| ~C_RS_DTR); |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:set_modem_info clearing " |
| "Z DTR\n"); |
| #endif |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| } else { |
| return -ENODEV; |
| } |
| spin_lock_irqsave(&card->card_lock, flags); |
| retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d " |
| "was %x\n", info->line, retval); |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| return 0; |
| } /* cy_tiocmset */ |
| |
| /* |
| * cy_break() --- routine which turns the break handling on or off |
| */ |
| static int cy_break(struct tty_struct *tty, int break_state) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| struct cyclades_card *card; |
| unsigned long flags; |
| int retval = 0; |
| |
| if (serial_paranoia_check(info, tty->name, "cy_break")) |
| return -EINVAL; |
| |
| card = info->card; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| if (!IS_CYC_Z(*card)) { |
| /* Let the transmit ISR take care of this (since it |
| requires stuffing characters into the output stream). |
| */ |
| if (break_state == -1) { |
| if (!info->breakon) { |
| info->breakon = 1; |
| if (!info->xmit_cnt) { |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| start_xmit(info); |
| spin_lock_irqsave(&card->card_lock, flags); |
| } |
| } |
| } else { |
| if (!info->breakoff) { |
| info->breakoff = 1; |
| if (!info->xmit_cnt) { |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| start_xmit(info); |
| spin_lock_irqsave(&card->card_lock, flags); |
| } |
| } |
| } |
| } else { |
| if (break_state == -1) { |
| retval = cyz_issue_cmd(card, |
| info->line - card->first_line, |
| C_CM_SET_BREAK, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:cy_break (set) retval on " |
| "ttyC%d was %x\n", info->line, retval); |
| } |
| } else { |
| retval = cyz_issue_cmd(card, |
| info->line - card->first_line, |
| C_CM_CLR_BREAK, 0L); |
| if (retval != 0) { |
| printk(KERN_DEBUG "cyc:cy_break (clr) retval " |
| "on ttyC%d was %x\n", info->line, |
| retval); |
| } |
| } |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| return retval; |
| } /* cy_break */ |
| |
| static int get_mon_info(struct cyclades_port *info, |
| struct cyclades_monitor __user *mon) |
| { |
| |
| if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor))) |
| return -EFAULT; |
| info->mon.int_count = 0; |
| info->mon.char_count = 0; |
| info->mon.char_max = 0; |
| info->mon.char_last = 0; |
| return 0; |
| } /* get_mon_info */ |
| |
| static int set_threshold(struct cyclades_port *info, unsigned long value) |
| { |
| struct cyclades_card *card; |
| void __iomem *base_addr; |
| int channel, chip, index; |
| unsigned long flags; |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = |
| card->base_addr + (cy_chip_offset[chip] << index); |
| |
| info->cor3 &= ~CyREC_FIFO; |
| info->cor3 |= value & CyREC_FIFO; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writeb(base_addr + (CyCOR3 << index), info->cor3); |
| cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index); |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| return 0; |
| } /* set_threshold */ |
| |
| static int get_threshold(struct cyclades_port *info, |
| unsigned long __user *value) |
| { |
| struct cyclades_card *card; |
| void __iomem *base_addr; |
| int channel, chip, index; |
| unsigned long tmp; |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| |
| tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO; |
| return put_user(tmp, value); |
| } |
| return 0; |
| } /* get_threshold */ |
| |
| static int set_default_threshold(struct cyclades_port *info, |
| unsigned long value) |
| { |
| info->default_threshold = value & 0x0f; |
| return 0; |
| } /* set_default_threshold */ |
| |
| static int get_default_threshold(struct cyclades_port *info, |
| unsigned long __user *value) |
| { |
| return put_user(info->default_threshold, value); |
| } /* get_default_threshold */ |
| |
| static int set_timeout(struct cyclades_port *info, unsigned long value) |
| { |
| struct cyclades_card *card; |
| void __iomem *base_addr; |
| int channel, chip, index; |
| unsigned long flags; |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writeb(base_addr + (CyRTPR << index), value & 0xff); |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| return 0; |
| } /* set_timeout */ |
| |
| static int get_timeout(struct cyclades_port *info, |
| unsigned long __user *value) |
| { |
| struct cyclades_card *card; |
| void __iomem *base_addr; |
| int channel, chip, index; |
| unsigned long tmp; |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| |
| tmp = readb(base_addr + (CyRTPR << index)); |
| return put_user(tmp, value); |
| } |
| return 0; |
| } /* get_timeout */ |
| |
| static int set_default_timeout(struct cyclades_port *info, unsigned long value) |
| { |
| info->default_timeout = value & 0xff; |
| return 0; |
| } /* set_default_timeout */ |
| |
| static int get_default_timeout(struct cyclades_port *info, |
| unsigned long __user *value) |
| { |
| return put_user(info->default_timeout, value); |
| } /* get_default_timeout */ |
| |
| /* |
| * This routine allows the tty driver to implement device- |
| * specific ioctl's. If the ioctl number passed in cmd is |
| * not recognized by the driver, it should return ENOIOCTLCMD. |
| */ |
| static int |
| cy_ioctl(struct tty_struct *tty, struct file *file, |
| unsigned int cmd, unsigned long arg) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| struct cyclades_icount cprev, cnow; /* kernel counter temps */ |
| struct serial_icounter_struct __user *p_cuser; /* user space */ |
| int ret_val = 0; |
| unsigned long flags; |
| void __user *argp = (void __user *)arg; |
| |
| if (serial_paranoia_check(info, tty->name, "cy_ioctl")) |
| return -ENODEV; |
| |
| #ifdef CY_DEBUG_OTHER |
| printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", |
| info->line, cmd, arg); |
| #endif |
| lock_kernel(); |
| |
| switch (cmd) { |
| case CYGETMON: |
| ret_val = get_mon_info(info, argp); |
| break; |
| case CYGETTHRESH: |
| ret_val = get_threshold(info, argp); |
| break; |
| case CYSETTHRESH: |
| ret_val = set_threshold(info, arg); |
| break; |
| case CYGETDEFTHRESH: |
| ret_val = get_default_threshold(info, argp); |
| break; |
| case CYSETDEFTHRESH: |
| ret_val = set_default_threshold(info, arg); |
| break; |
| case CYGETTIMEOUT: |
| ret_val = get_timeout(info, argp); |
| break; |
| case CYSETTIMEOUT: |
| ret_val = set_timeout(info, arg); |
| break; |
| case CYGETDEFTIMEOUT: |
| ret_val = get_default_timeout(info, argp); |
| break; |
| case CYSETDEFTIMEOUT: |
| ret_val = set_default_timeout(info, arg); |
| break; |
| case CYSETRFLOW: |
| info->rflow = (int)arg; |
| ret_val = 0; |
| break; |
| case CYGETRFLOW: |
| ret_val = info->rflow; |
| break; |
| case CYSETRTSDTR_INV: |
| info->rtsdtr_inv = (int)arg; |
| ret_val = 0; |
| break; |
| case CYGETRTSDTR_INV: |
| ret_val = info->rtsdtr_inv; |
| break; |
| case CYGETCD1400VER: |
| ret_val = info->chip_rev; |
| break; |
| #ifndef CONFIG_CYZ_INTR |
| case CYZSETPOLLCYCLE: |
| cyz_polling_cycle = (arg * HZ) / 1000; |
| ret_val = 0; |
| break; |
| case CYZGETPOLLCYCLE: |
| ret_val = (cyz_polling_cycle * 1000) / HZ; |
| break; |
| #endif /* CONFIG_CYZ_INTR */ |
| case CYSETWAIT: |
| info->port.closing_wait = (unsigned short)arg * HZ / 100; |
| ret_val = 0; |
| break; |
| case CYGETWAIT: |
| ret_val = info->port.closing_wait / (HZ / 100); |
| break; |
| case TIOCGSERIAL: |
| ret_val = get_serial_info(info, argp); |
| break; |
| case TIOCSSERIAL: |
| ret_val = set_serial_info(info, argp); |
| break; |
| case TIOCSERGETLSR: /* Get line status register */ |
| ret_val = get_lsr_info(info, argp); |
| break; |
| /* |
| * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change |
| * - mask passed in arg for lines of interest |
| * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) |
| * Caller should use TIOCGICOUNT to see which one it was |
| */ |
| case TIOCMIWAIT: |
| spin_lock_irqsave(&info->card->card_lock, flags); |
| /* note the counters on entry */ |
| cnow = info->icount; |
| spin_unlock_irqrestore(&info->card->card_lock, flags); |
| ret_val = wait_event_interruptible(info->delta_msr_wait, ({ |
| cprev = cnow; |
| spin_lock_irqsave(&info->card->card_lock, flags); |
| cnow = info->icount; /* atomic copy */ |
| spin_unlock_irqrestore(&info->card->card_lock, flags); |
| |
| ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || |
| ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || |
| ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || |
| ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)); |
| })); |
| break; |
| |
| /* |
| * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) |
| * Return: write counters to the user passed counter struct |
| * NB: both 1->0 and 0->1 transitions are counted except for |
| * RI where only 0->1 is counted. |
| */ |
| case TIOCGICOUNT: |
| spin_lock_irqsave(&info->card->card_lock, flags); |
| cnow = info->icount; |
| spin_unlock_irqrestore(&info->card->card_lock, flags); |
| p_cuser = argp; |
| ret_val = put_user(cnow.cts, &p_cuser->cts); |
| if (ret_val) |
| break; |
| ret_val = put_user(cnow.dsr, &p_cuser->dsr); |
| if (ret_val) |
| break; |
| ret_val = put_user(cnow.rng, &p_cuser->rng); |
| if (ret_val) |
| break; |
| ret_val = put_user(cnow.dcd, &p_cuser->dcd); |
| if (ret_val) |
| break; |
| ret_val = put_user(cnow.rx, &p_cuser->rx); |
| if (ret_val) |
| break; |
| ret_val = put_user(cnow.tx, &p_cuser->tx); |
| if (ret_val) |
| break; |
| ret_val = put_user(cnow.frame, &p_cuser->frame); |
| if (ret_val) |
| break; |
| ret_val = put_user(cnow.overrun, &p_cuser->overrun); |
| if (ret_val) |
| break; |
| ret_val = put_user(cnow.parity, &p_cuser->parity); |
| if (ret_val) |
| break; |
| ret_val = put_user(cnow.brk, &p_cuser->brk); |
| if (ret_val) |
| break; |
| ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun); |
| if (ret_val) |
| break; |
| ret_val = 0; |
| break; |
| default: |
| ret_val = -ENOIOCTLCMD; |
| } |
| unlock_kernel(); |
| |
| #ifdef CY_DEBUG_OTHER |
| printk(KERN_DEBUG "cyc:cy_ioctl done\n"); |
| #endif |
| return ret_val; |
| } /* cy_ioctl */ |
| |
| /* |
| * This routine allows the tty driver to be notified when |
| * device's termios settings have changed. Note that a |
| * well-designed tty driver should be prepared to accept the case |
| * where old == NULL, and try to do something rational. |
| */ |
| static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| |
| #ifdef CY_DEBUG_OTHER |
| printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line); |
| #endif |
| |
| set_line_char(info); |
| |
| if ((old_termios->c_cflag & CRTSCTS) && |
| !(tty->termios->c_cflag & CRTSCTS)) { |
| tty->hw_stopped = 0; |
| cy_start(tty); |
| } |
| #if 0 |
| /* |
| * No need to wake up processes in open wait, since they |
| * sample the CLOCAL flag once, and don't recheck it. |
| * XXX It's not clear whether the current behavior is correct |
| * or not. Hence, this may change..... |
| */ |
| if (!(old_termios->c_cflag & CLOCAL) && |
| (tty->termios->c_cflag & CLOCAL)) |
| wake_up_interruptible(&info->port.open_wait); |
| #endif |
| } /* cy_set_termios */ |
| |
| /* This function is used to send a high-priority XON/XOFF character to |
| the device. |
| */ |
| static void cy_send_xchar(struct tty_struct *tty, char ch) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| struct cyclades_card *card; |
| int channel; |
| |
| if (serial_paranoia_check(info, tty->name, "cy_send_xchar")) |
| return; |
| |
| info->x_char = ch; |
| |
| if (ch) |
| cy_start(tty); |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| |
| if (IS_CYC_Z(*card)) { |
| if (ch == STOP_CHAR(tty)) |
| cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L); |
| else if (ch == START_CHAR(tty)) |
| cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L); |
| } |
| } |
| |
| /* This routine is called by the upper-layer tty layer to signal |
| that incoming characters should be throttled because the input |
| buffers are close to full. |
| */ |
| static void cy_throttle(struct tty_struct *tty) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| struct cyclades_card *card; |
| unsigned long flags; |
| void __iomem *base_addr; |
| int chip, channel, index; |
| |
| #ifdef CY_DEBUG_THROTTLE |
| char buf[64]; |
| |
| printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf), |
| tty->ldisc.chars_in_buffer(tty), info->line); |
| #endif |
| |
| if (serial_paranoia_check(info, tty->name, "cy_throttle")) |
| return; |
| |
| card = info->card; |
| |
| if (I_IXOFF(tty)) { |
| if (!IS_CYC_Z(*card)) |
| cy_send_xchar(tty, STOP_CHAR(tty)); |
| else |
| info->throttle = 1; |
| } |
| |
| if (tty->termios->c_cflag & CRTSCTS) { |
| channel = info->line - card->first_line; |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + |
| (cy_chip_offset[chip] << index); |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), |
| (u_char) channel); |
| if (info->rtsdtr_inv) { |
| cy_writeb(base_addr + (CyMSVR2 << index), |
| ~CyDTR); |
| } else { |
| cy_writeb(base_addr + (CyMSVR1 << index), |
| ~CyRTS); |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } else { |
| info->throttle = 1; |
| } |
| } |
| } /* cy_throttle */ |
| |
| /* |
| * This routine notifies the tty driver that it should signal |
| * that characters can now be sent to the tty without fear of |
| * overrunning the input buffers of the line disciplines. |
| */ |
| static void cy_unthrottle(struct tty_struct *tty) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| struct cyclades_card *card; |
| unsigned long flags; |
| void __iomem *base_addr; |
| int chip, channel, index; |
| |
| #ifdef CY_DEBUG_THROTTLE |
| char buf[64]; |
| |
| printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n", |
| tty_name(tty, buf), tty_chars_in_buffer(tty), info->line); |
| #endif |
| |
| if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) |
| return; |
| |
| if (I_IXOFF(tty)) { |
| if (info->x_char) |
| info->x_char = 0; |
| else |
| cy_send_xchar(tty, START_CHAR(tty)); |
| } |
| |
| if (tty->termios->c_cflag & CRTSCTS) { |
| card = info->card; |
| channel = info->line - card->first_line; |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + |
| (cy_chip_offset[chip] << index); |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), |
| (u_char) channel); |
| if (info->rtsdtr_inv) { |
| cy_writeb(base_addr + (CyMSVR2 << index), |
| CyDTR); |
| } else { |
| cy_writeb(base_addr + (CyMSVR1 << index), |
| CyRTS); |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } else { |
| info->throttle = 0; |
| } |
| } |
| } /* cy_unthrottle */ |
| |
| /* cy_start and cy_stop provide software output flow control as a |
| function of XON/XOFF, software CTS, and other such stuff. |
| */ |
| static void cy_stop(struct tty_struct *tty) |
| { |
| struct cyclades_card *cinfo; |
| struct cyclades_port *info = tty->driver_data; |
| void __iomem *base_addr; |
| int chip, channel, index; |
| unsigned long flags; |
| |
| #ifdef CY_DEBUG_OTHER |
| printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line); |
| #endif |
| |
| if (serial_paranoia_check(info, tty->name, "cy_stop")) |
| return; |
| |
| cinfo = info->card; |
| channel = info->line - cinfo->first_line; |
| if (!IS_CYC_Z(*cinfo)) { |
| index = cinfo->bus_index; |
| chip = channel >> 2; |
| channel &= 0x03; |
| base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index); |
| |
| spin_lock_irqsave(&cinfo->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), |
| (u_char)(channel & 0x0003)); /* index channel */ |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & ~CyTxRdy); |
| spin_unlock_irqrestore(&cinfo->card_lock, flags); |
| } |
| } /* cy_stop */ |
| |
| static void cy_start(struct tty_struct *tty) |
| { |
| struct cyclades_card *cinfo; |
| struct cyclades_port *info = tty->driver_data; |
| void __iomem *base_addr; |
| int chip, channel, index; |
| unsigned long flags; |
| |
| #ifdef CY_DEBUG_OTHER |
| printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line); |
| #endif |
| |
| if (serial_paranoia_check(info, tty->name, "cy_start")) |
| return; |
| |
| cinfo = info->card; |
| channel = info->line - cinfo->first_line; |
| index = cinfo->bus_index; |
| if (!IS_CYC_Z(*cinfo)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index); |
| |
| spin_lock_irqsave(&cinfo->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), |
| (u_char) (channel & 0x0003)); /* index channel */ |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) | CyTxRdy); |
| spin_unlock_irqrestore(&cinfo->card_lock, flags); |
| } |
| } /* cy_start */ |
| |
| /* |
| * cy_hangup() --- called by tty_hangup() when a hangup is signaled. |
| */ |
| static void cy_hangup(struct tty_struct *tty) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| |
| #ifdef CY_DEBUG_OTHER |
| printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line); |
| #endif |
| |
| if (serial_paranoia_check(info, tty->name, "cy_hangup")) |
| return; |
| |
| cy_flush_buffer(tty); |
| shutdown(info); |
| info->port.count = 0; |
| #ifdef CY_DEBUG_COUNT |
| printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n", |
| current->pid); |
| #endif |
| info->port.tty = NULL; |
| info->port.flags &= ~ASYNC_NORMAL_ACTIVE; |
| wake_up_interruptible(&info->port.open_wait); |
| } /* cy_hangup */ |
| |
| /* |
| * --------------------------------------------------------------------- |
| * cy_init() and friends |
| * |
| * cy_init() is called at boot-time to initialize the serial driver. |
| * --------------------------------------------------------------------- |
| */ |
| |
| static int __devinit cy_init_card(struct cyclades_card *cinfo) |
| { |
| struct cyclades_port *info; |
| u32 uninitialized_var(mailbox); |
| unsigned int nports, port; |
| unsigned short chip_number; |
| int uninitialized_var(index); |
| |
| spin_lock_init(&cinfo->card_lock); |
| |
| if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */ |
| mailbox = readl(&((struct RUNTIME_9060 __iomem *) |
| cinfo->ctl_addr)->mail_box_0); |
| nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8; |
| cinfo->intr_enabled = 0; |
| cinfo->nports = 0; /* Will be correctly set later, after |
| Z FW is loaded */ |
| } else { |
| index = cinfo->bus_index; |
| nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips; |
| } |
| |
| cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL); |
| if (cinfo->ports == NULL) { |
| printk(KERN_ERR "Cyclades: cannot allocate ports\n"); |
| cinfo->nports = 0; |
| return -ENOMEM; |
| } |
| |
| for (port = cinfo->first_line; port < cinfo->first_line + nports; |
| port++) { |
| info = &cinfo->ports[port - cinfo->first_line]; |
| tty_port_init(&info->port); |
| info->magic = CYCLADES_MAGIC; |
| info->card = cinfo; |
| info->line = port; |
| |
| info->port.closing_wait = CLOSING_WAIT_DELAY; |
| info->port.close_delay = 5 * HZ / 10; |
| info->port.flags = STD_COM_FLAGS; |
| init_completion(&info->shutdown_wait); |
| init_waitqueue_head(&info->delta_msr_wait); |
| |
| if (IS_CYC_Z(*cinfo)) { |
| info->type = PORT_STARTECH; |
| if (mailbox == ZO_V1) |
| info->xmit_fifo_size = CYZ_FIFO_SIZE; |
| else |
| info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE; |
| #ifdef CONFIG_CYZ_INTR |
| setup_timer(&cyz_rx_full_timer[port], |
| cyz_rx_restart, (unsigned long)info); |
| #endif |
| } else { |
| info->type = PORT_CIRRUS; |
| info->xmit_fifo_size = CyMAX_CHAR_FIFO; |
| info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS; |
| info->cor2 = CyETC; |
| info->cor3 = 0x08; /* _very_ small rcv threshold */ |
| |
| chip_number = (port - cinfo->first_line) / 4; |
| info->chip_rev = readb(cinfo->base_addr + |
| (cy_chip_offset[chip_number] << index) + |
| (CyGFRCR << index)); |
| |
| if (info->chip_rev >= CD1400_REV_J) { |
| /* It is a CD1400 rev. J or later */ |
| info->tbpr = baud_bpr_60[13]; /* Tx BPR */ |
| info->tco = baud_co_60[13]; /* Tx CO */ |
| info->rbpr = baud_bpr_60[13]; /* Rx BPR */ |
| info->rco = baud_co_60[13]; /* Rx CO */ |
| info->rtsdtr_inv = 1; |
| } else { |
| info->tbpr = baud_bpr_25[13]; /* Tx BPR */ |
| info->tco = baud_co_25[13]; /* Tx CO */ |
| info->rbpr = baud_bpr_25[13]; /* Rx BPR */ |
| info->rco = baud_co_25[13]; /* Rx CO */ |
| info->rtsdtr_inv = 0; |
| } |
| info->read_status_mask = CyTIMEOUT | CySPECHAR | |
| CyBREAK | CyPARITY | CyFRAME | CyOVERRUN; |
| } |
| |
| } |
| |
| #ifndef CONFIG_CYZ_INTR |
| if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) { |
| mod_timer(&cyz_timerlist, jiffies + 1); |
| #ifdef CY_PCI_DEBUG |
| printk(KERN_DEBUG "Cyclades-Z polling initialized\n"); |
| #endif |
| } |
| #endif |
| return 0; |
| } |
| |
| /* initialize chips on Cyclom-Y card -- return number of valid |
| chips (which is number of ports/4) */ |
| static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr, |
| int index) |
| { |
| unsigned int chip_number; |
| void __iomem *base_addr; |
| |
| cy_writeb(true_base_addr + (Cy_HwReset << index), 0); |
| /* Cy_HwReset is 0x1400 */ |
| cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0); |
| /* Cy_ClrIntr is 0x1800 */ |
| udelay(500L); |
| |
| for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; |
| chip_number++) { |
| base_addr = |
| true_base_addr + (cy_chip_offset[chip_number] << index); |
| mdelay(1); |
| if (readb(base_addr + (CyCCR << index)) != 0x00) { |
| /************* |
| printk(" chip #%d at %#6lx is never idle (CCR != 0)\n", |
| chip_number, (unsigned long)base_addr); |
| *************/ |
| return chip_number; |
| } |
| |
| cy_writeb(base_addr + (CyGFRCR << index), 0); |
| udelay(10L); |
| |
| /* The Cyclom-16Y does not decode address bit 9 and therefore |
| cannot distinguish between references to chip 0 and a non- |
| existent chip 4. If the preceding clearing of the supposed |
| chip 4 GFRCR register appears at chip 0, there is no chip 4 |
| and this must be a Cyclom-16Y, not a Cyclom-32Ye. |
| */ |
| if (chip_number == 4 && readb(true_base_addr + |
| (cy_chip_offset[0] << index) + |
| (CyGFRCR << index)) == 0) { |
| return chip_number; |
| } |
| |
| cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET); |
| mdelay(1); |
| |
| if (readb(base_addr + (CyGFRCR << index)) == 0x00) { |
| /* |
| printk(" chip #%d at %#6lx is not responding ", |
| chip_number, (unsigned long)base_addr); |
| printk("(GFRCR stayed 0)\n", |
| */ |
| return chip_number; |
| } |
| if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) != |
| 0x40) { |
| /* |
| printk(" chip #%d at %#6lx is not valid (GFRCR == " |
| "%#2x)\n", |
| chip_number, (unsigned long)base_addr, |
| base_addr[CyGFRCR<<index]); |
| */ |
| return chip_number; |
| } |
| cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL); |
| if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) { |
| /* It is a CD1400 rev. J or later */ |
| /* Impossible to reach 5ms with this chip. |
| Changed to 2ms instead (f = 500 Hz). */ |
| cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS); |
| } else { |
| /* f = 200 Hz */ |
| cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS); |
| } |
| |
| /* |
| printk(" chip #%d at %#6lx is rev 0x%2x\n", |
| chip_number, (unsigned long)base_addr, |
| readb(base_addr+(CyGFRCR<<index))); |
| */ |
| } |
| return chip_number; |
| } /* cyy_init_card */ |
| |
| /* |
| * --------------------------------------------------------------------- |
| * cy_detect_isa() - Probe for Cyclom-Y/ISA boards. |
| * sets global variables and return the number of ISA boards found. |
| * --------------------------------------------------------------------- |
| */ |
| static int __init cy_detect_isa(void) |
| { |
| #ifdef CONFIG_ISA |
| unsigned short cy_isa_irq, nboard; |
| void __iomem *cy_isa_address; |
| unsigned short i, j, cy_isa_nchan; |
| #ifdef MODULE |
| int isparam = 0; |
| #endif |
| |
| nboard = 0; |
| |
| #ifdef MODULE |
| /* Check for module parameters */ |
| for (i = 0; i < NR_CARDS; i++) { |
| if (maddr[i] || i) { |
| isparam = 1; |
| cy_isa_addresses[i] = maddr[i]; |
| } |
| if (!maddr[i]) |
| break; |
| } |
| #endif |
| |
| /* scan the address table probing for Cyclom-Y/ISA boards */ |
| for (i = 0; i < NR_ISA_ADDRS; i++) { |
| unsigned int isa_address = cy_isa_addresses[i]; |
| if (isa_address == 0x0000) |
| return nboard; |
| |
| /* probe for CD1400... */ |
| cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin); |
| if (cy_isa_address == NULL) { |
| printk(KERN_ERR "Cyclom-Y/ISA: can't remap base " |
| "address\n"); |
| continue; |
| } |
| cy_isa_nchan = CyPORTS_PER_CHIP * |
| cyy_init_card(cy_isa_address, 0); |
| if (cy_isa_nchan == 0) { |
| iounmap(cy_isa_address); |
| continue; |
| } |
| #ifdef MODULE |
| if (isparam && irq[i]) |
| cy_isa_irq = irq[i]; |
| else |
| #endif |
| /* find out the board's irq by probing */ |
| cy_isa_irq = detect_isa_irq(cy_isa_address); |
| if (cy_isa_irq == 0) { |
| printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the " |
| "IRQ could not be detected.\n", |
| (unsigned long)cy_isa_address); |
| iounmap(cy_isa_address); |
| continue; |
| } |
| |
| if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) { |
| printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no " |
| "more channels are available. Change NR_PORTS " |
| "in cyclades.c and recompile kernel.\n", |
| (unsigned long)cy_isa_address); |
| iounmap(cy_isa_address); |
| return nboard; |
| } |
| /* fill the next cy_card structure available */ |
| for (j = 0; j < NR_CARDS; j++) { |
| if (cy_card[j].base_addr == NULL) |
| break; |
| } |
| if (j == NR_CARDS) { /* no more cy_cards available */ |
| printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no " |
| "more cards can be used. Change NR_CARDS in " |
| "cyclades.c and recompile kernel.\n", |
| (unsigned long)cy_isa_address); |
| iounmap(cy_isa_address); |
| return nboard; |
| } |
| |
| /* allocate IRQ */ |
| if (request_irq(cy_isa_irq, cyy_interrupt, |
| IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) { |
| printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but " |
| "could not allocate IRQ#%d.\n", |
| (unsigned long)cy_isa_address, cy_isa_irq); |
| iounmap(cy_isa_address); |
| return nboard; |
| } |
| |
| /* set cy_card */ |
| cy_card[j].base_addr = cy_isa_address; |
| cy_card[j].ctl_addr = NULL; |
| cy_card[j].irq = (int)cy_isa_irq; |
| cy_card[j].bus_index = 0; |
| cy_card[j].first_line = cy_next_channel; |
| cy_card[j].num_chips = cy_isa_nchan / 4; |
| if (cy_init_card(&cy_card[j])) { |
| cy_card[j].base_addr = NULL; |
| free_irq(cy_isa_irq, &cy_card[j]); |
| iounmap(cy_isa_address); |
| continue; |
| } |
| nboard++; |
| |
| printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: " |
| "%d channels starting from port %d\n", |
| j + 1, (unsigned long)cy_isa_address, |
| (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)), |
| cy_isa_irq, cy_isa_nchan, cy_next_channel); |
| |
| for (j = cy_next_channel; |
| j < cy_next_channel + cy_isa_nchan; j++) |
| tty_register_device(cy_serial_driver, j, NULL); |
| cy_next_channel += cy_isa_nchan; |
| } |
| return nboard; |
| #else |
| return 0; |
| #endif /* CONFIG_ISA */ |
| } /* cy_detect_isa */ |
| |
| #ifdef CONFIG_PCI |
| static inline int __devinit cyc_isfwstr(const char *str, unsigned int size) |
| { |
| unsigned int a; |
| |
| for (a = 0; a < size && *str; a++, str++) |
| if (*str & 0x80) |
| return -EINVAL; |
| |
| for (; a < size; a++, str++) |
| if (*str) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data, |
| unsigned int size) |
| { |
| for (; size > 0; size--) { |
| cy_writel(fpga, *data++); |
| udelay(10); |
| } |
| } |
| |
| static void __devinit plx_init(struct pci_dev *pdev, int irq, |
| struct RUNTIME_9060 __iomem *addr) |
| { |
| /* Reset PLX */ |
| cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000); |
| udelay(100L); |
| cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000); |
| |
| /* Reload Config. Registers from EEPROM */ |
| cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000); |
| udelay(100L); |
| cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000); |
| |
| /* For some yet unknown reason, once the PLX9060 reloads the EEPROM, |
| * the IRQ is lost and, thus, we have to re-write it to the PCI config. |
| * registers. This will remain here until we find a permanent fix. |
| */ |
| pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq); |
| } |
| |
| static int __devinit __cyz_load_fw(const struct firmware *fw, |
| const char *name, const u32 mailbox, void __iomem *base, |
| void __iomem *fpga) |
| { |
| const void *ptr = fw->data; |
| const struct zfile_header *h = ptr; |
| const struct zfile_config *c, *cs; |
| const struct zfile_block *b, *bs; |
| unsigned int a, tmp, len = fw->size; |
| #define BAD_FW KERN_ERR "Bad firmware: " |
| if (len < sizeof(*h)) { |
| printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h)); |
| return -EINVAL; |
| } |
| |
| cs = ptr + h->config_offset; |
| bs = ptr + h->block_offset; |
| |
| if ((void *)(cs + h->n_config) > ptr + len || |
| (void *)(bs + h->n_blocks) > ptr + len) { |
| printk(BAD_FW "too short"); |
| return -EINVAL; |
| } |
| |
| if (cyc_isfwstr(h->name, sizeof(h->name)) || |
| cyc_isfwstr(h->date, sizeof(h->date))) { |
| printk(BAD_FW "bad formatted header string\n"); |
| return -EINVAL; |
| } |
| |
| if (strncmp(name, h->name, sizeof(h->name))) { |
| printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name); |
| return -EINVAL; |
| } |
| |
| tmp = 0; |
| for (c = cs; c < cs + h->n_config; c++) { |
| for (a = 0; a < c->n_blocks; a++) |
| if (c->block_list[a] > h->n_blocks) { |
| printk(BAD_FW "bad block ref number in cfgs\n"); |
| return -EINVAL; |
| } |
| if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */ |
| tmp++; |
| } |
| if (!tmp) { |
| printk(BAD_FW "nothing appropriate\n"); |
| return -EINVAL; |
| } |
| |
| for (b = bs; b < bs + h->n_blocks; b++) |
| if (b->file_offset + b->size > len) { |
| printk(BAD_FW "bad block data offset\n"); |
| return -EINVAL; |
| } |
| |
| /* everything is OK, let's seek'n'load it */ |
| for (c = cs; c < cs + h->n_config; c++) |
| if (c->mailbox == mailbox && c->function == 0) |
| break; |
| |
| for (a = 0; a < c->n_blocks; a++) { |
| b = &bs[c->block_list[a]]; |
| if (b->type == ZBLOCK_FPGA) { |
| if (fpga != NULL) |
| cyz_fpga_copy(fpga, ptr + b->file_offset, |
| b->size); |
| } else { |
| if (base != NULL) |
| memcpy_toio(base + b->ram_offset, |
| ptr + b->file_offset, b->size); |
| } |
| } |
| #undef BAD_FW |
| return 0; |
| } |
| |
| static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr, |
| struct RUNTIME_9060 __iomem *ctl_addr, int irq) |
| { |
| const struct firmware *fw; |
| struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS; |
| struct CUSTOM_REG __iomem *cust = base_addr; |
| struct ZFW_CTRL __iomem *pt_zfwctrl; |
| void __iomem *tmp; |
| u32 mailbox, status; |
| unsigned int i; |
| int retval; |
| |
| retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev); |
| if (retval) { |
| dev_err(&pdev->dev, "can't get firmware\n"); |
| goto err; |
| } |
| |
| /* Check whether the firmware is already loaded and running. If |
| positive, skip this board */ |
| if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) { |
| u32 cntval = readl(base_addr + 0x190); |
| |
| udelay(100); |
| if (cntval != readl(base_addr + 0x190)) { |
| /* FW counter is working, FW is running */ |
| dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. " |
| "Skipping board.\n"); |
| retval = 0; |
| goto err_rel; |
| } |
| } |
| |
| /* start boot */ |
| cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) & |
| ~0x00030800UL); |
| |
| mailbox = readl(&ctl_addr->mail_box_0); |
| |
| if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) { |
| /* stops CPU and set window to beginning of RAM */ |
| cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); |
| cy_writel(&cust->cpu_stop, 0); |
| cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); |
| udelay(100); |
| } |
| |
| plx_init(pdev, irq, ctl_addr); |
| |
| if (mailbox != 0) { |
| /* load FPGA */ |
| retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL, |
| base_addr); |
| if (retval) |
| goto err_rel; |
| if (!Z_FPGA_LOADED(ctl_addr)) { |
| dev_err(&pdev->dev, "fw upload successful, but fw is " |
| "not loaded\n"); |
| goto err_rel; |
| } |
| } |
| |
| /* stops CPU and set window to beginning of RAM */ |
| cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); |
| cy_writel(&cust->cpu_stop, 0); |
| cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); |
| udelay(100); |
| |
| /* clear memory */ |
| for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++) |
| cy_writeb(tmp, 255); |
| if (mailbox != 0) { |
| /* set window to last 512K of RAM */ |
| cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE); |
| for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++) |
| cy_writeb(tmp, 255); |
| /* set window to beginning of RAM */ |
| cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); |
| } |
| |
| retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL); |
| release_firmware(fw); |
| if (retval) |
| goto err; |
| |
| /* finish boot and start boards */ |
| cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); |
| cy_writel(&cust->cpu_start, 0); |
| cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); |
| i = 0; |
| while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40) |
| msleep(100); |
| if (status != ZFIRM_ID) { |
| if (status == ZFIRM_HLT) { |
| dev_err(&pdev->dev, "you need an external power supply " |
| "for this number of ports. Firmware halted and " |
| "board reset.\n"); |
| retval = -EIO; |
| goto err; |
| } |
| dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting " |
| "some more time\n", status); |
| while ((status = readl(&fid->signature)) != ZFIRM_ID && |
| i++ < 200) |
| msleep(100); |
| if (status != ZFIRM_ID) { |
| dev_err(&pdev->dev, "Board not started in 20 seconds! " |
| "Giving up. (fid->signature = 0x%x)\n", |
| status); |
| dev_info(&pdev->dev, "*** Warning ***: if you are " |
| "upgrading the FW, please power cycle the " |
| "system before loading the new FW to the " |
| "Cyclades-Z.\n"); |
| |
| if (Z_FPGA_LOADED(ctl_addr)) |
| plx_init(pdev, irq, ctl_addr); |
| |
| retval = -EIO; |
| goto err; |
| } |
| dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n", |
| i / 10); |
| } |
| pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr); |
| |
| dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n", |
| base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr), |
| base_addr + readl(&fid->zfwctrl_addr)); |
| |
| dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n", |
| readl(&pt_zfwctrl->board_ctrl.fw_version), |
| readl(&pt_zfwctrl->board_ctrl.n_channel)); |
| |
| if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) { |
| dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please " |
| "check the connection between the Z host card and the " |
| "serial expanders.\n"); |
| |
| if (Z_FPGA_LOADED(ctl_addr)) |
| plx_init(pdev, irq, ctl_addr); |
| |
| dev_info(&pdev->dev, "Null number of ports detected. Board " |
| "reset.\n"); |
| retval = 0; |
| goto err; |
| } |
| |
| cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX); |
| cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION); |
| |
| /* |
| Early firmware failed to start looking for commands. |
| This enables firmware interrupts for those commands. |
| */ |
| cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) | |
| (1 << 17)); |
| cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) | |
| 0x00030800UL); |
| |
| plx_init(pdev, irq, ctl_addr); |
| |
| return 0; |
| err_rel: |
| release_firmware(fw); |
| err: |
| return retval; |
| } |
| |
| static int __devinit cy_pci_probe(struct pci_dev *pdev, |
| const struct pci_device_id *ent) |
| { |
| void __iomem *addr0 = NULL, *addr2 = NULL; |
| char *card_name = NULL; |
| u32 mailbox; |
| unsigned int device_id, nchan = 0, card_no, i; |
| unsigned char plx_ver; |
| int retval, irq; |
| |
| retval = pci_enable_device(pdev); |
| if (retval) { |
| dev_err(&pdev->dev, "cannot enable device\n"); |
| goto err; |
| } |
| |
| /* read PCI configuration area */ |
| irq = pdev->irq; |
| device_id = pdev->device & ~PCI_DEVICE_ID_MASK; |
| |
| #if defined(__alpha__) |
| if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */ |
| dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low " |
| "addresses on Alpha systems.\n"); |
| retval = -EIO; |
| goto err_dis; |
| } |
| #endif |
| if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) { |
| dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low " |
| "addresses\n"); |
| retval = -EIO; |
| goto err_dis; |
| } |
| |
| if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) { |
| dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring " |
| "it...\n"); |
| pdev->resource[2].flags &= ~IORESOURCE_IO; |
| } |
| |
| retval = pci_request_regions(pdev, "cyclades"); |
| if (retval) { |
| dev_err(&pdev->dev, "failed to reserve resources\n"); |
| goto err_dis; |
| } |
| |
| retval = -EIO; |
| if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || |
| device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { |
| card_name = "Cyclom-Y"; |
| |
| addr0 = ioremap_nocache(pci_resource_start(pdev, 0), |
| CyPCI_Yctl); |
| if (addr0 == NULL) { |
| dev_err(&pdev->dev, "can't remap ctl region\n"); |
| goto err_reg; |
| } |
| addr2 = ioremap_nocache(pci_resource_start(pdev, 2), |
| CyPCI_Ywin); |
| if (addr2 == NULL) { |
| dev_err(&pdev->dev, "can't remap base region\n"); |
| goto err_unmap; |
| } |
| |
| nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1); |
| if (nchan == 0) { |
| dev_err(&pdev->dev, "Cyclom-Y PCI host card with no " |
| "Serial-Modules\n"); |
| goto err_unmap; |
| } |
| } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) { |
| struct RUNTIME_9060 __iomem *ctl_addr; |
| |
| ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0), |
| CyPCI_Zctl); |
| if (addr0 == NULL) { |
| dev_err(&pdev->dev, "can't remap ctl region\n"); |
| goto err_reg; |
| } |
| |
| /* Disable interrupts on the PLX before resetting it */ |
| cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900); |
| |
| plx_init(pdev, irq, addr0); |
| |
| mailbox = (u32)readl(&ctl_addr->mail_box_0); |
| |
| addr2 = ioremap_nocache(pci_resource_start(pdev, 2), |
| mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin); |
| if (addr2 == NULL) { |
| dev_err(&pdev->dev, "can't remap base region\n"); |
| goto err_unmap; |
| } |
| |
| if (mailbox == ZE_V1) { |
| card_name = "Cyclades-Ze"; |
| |
| readl(&ctl_addr->mail_box_0); |
| nchan = ZE_V1_NPORTS; |
| } else { |
| card_name = "Cyclades-8Zo"; |
| |
| #ifdef CY_PCI_DEBUG |
| if (mailbox == ZO_V1) { |
| cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); |
| dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA " |
| "id %lx, ver %lx\n", (ulong)(0xff & |
| readl(&((struct CUSTOM_REG *)addr2)-> |
| fpga_id)), (ulong)(0xff & |
| readl(&((struct CUSTOM_REG *)addr2)-> |
| fpga_version))); |
| cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); |
| } else { |
| dev_info(&pdev->dev, "Cyclades-Z/PCI: New " |
| "Cyclades-Z board. FPGA not loaded\n"); |
| } |
| #endif |
| /* The following clears the firmware id word. This |
| ensures that the driver will not attempt to talk to |
| the board until it has been properly initialized. |
| */ |
| if ((mailbox == ZO_V1) || (mailbox == ZO_V2)) |
| cy_writel(addr2 + ID_ADDRESS, 0L); |
| |
| retval = cyz_load_fw(pdev, addr2, addr0, irq); |
| if (retval) |
| goto err_unmap; |
| /* This must be a Cyclades-8Zo/PCI. The extendable |
| version will have a different device_id and will |
| be allocated its maximum number of ports. */ |
| nchan = 8; |
| } |
| } |
| |
| if ((cy_next_channel + nchan) > NR_PORTS) { |
| dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no " |
| "channels are available. Change NR_PORTS in " |
| "cyclades.c and recompile kernel.\n"); |
| goto err_unmap; |
| } |
| /* fill the next cy_card structure available */ |
| for (card_no = 0; card_no < NR_CARDS; card_no++) { |
| if (cy_card[card_no].base_addr == NULL) |
| break; |
| } |
| if (card_no == NR_CARDS) { /* no more cy_cards available */ |
| dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no " |
| "more cards can be used. Change NR_CARDS in " |
| "cyclades.c and recompile kernel.\n"); |
| goto err_unmap; |
| } |
| |
| if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || |
| device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { |
| /* allocate IRQ */ |
| retval = request_irq(irq, cyy_interrupt, |
| IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]); |
| if (retval) { |
| dev_err(&pdev->dev, "could not allocate IRQ\n"); |
| goto err_unmap; |
| } |
| cy_card[card_no].num_chips = nchan / 4; |
| } else { |
| #ifdef CONFIG_CYZ_INTR |
| /* allocate IRQ only if board has an IRQ */ |
| if (irq != 0 && irq != 255) { |
| retval = request_irq(irq, cyz_interrupt, |
| IRQF_SHARED, "Cyclades-Z", |
| &cy_card[card_no]); |
| if (retval) { |
| dev_err(&pdev->dev, "could not allocate IRQ\n"); |
| goto err_unmap; |
| } |
| } |
| #endif /* CONFIG_CYZ_INTR */ |
| cy_card[card_no].num_chips = (unsigned int)-1; |
| } |
| |
| /* set cy_card */ |
| cy_card[card_no].base_addr = addr2; |
| cy_card[card_no].ctl_addr = addr0; |
| cy_card[card_no].irq = irq; |
| cy_card[card_no].bus_index = 1; |
| cy_card[card_no].first_line = cy_next_channel; |
| retval = cy_init_card(&cy_card[card_no]); |
| if (retval) |
| goto err_null; |
| |
| pci_set_drvdata(pdev, &cy_card[card_no]); |
| |
| if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || |
| device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { |
| /* enable interrupts in the PCI interface */ |
| plx_ver = readb(addr2 + CyPLX_VER) & 0x0f; |
| switch (plx_ver) { |
| case PLX_9050: |
| |
| cy_writeb(addr0 + 0x4c, 0x43); |
| break; |
| |
| case PLX_9060: |
| case PLX_9080: |
| default: /* Old boards, use PLX_9060 */ |
| plx_init(pdev, irq, addr0); |
| cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900); |
| break; |
| } |
| } |
| |
| dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from " |
| "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel); |
| for (i = cy_next_channel; i < cy_next_channel + nchan; i++) |
| tty_register_device(cy_serial_driver, i, &pdev->dev); |
| cy_next_channel += nchan; |
| |
| return 0; |
| err_null: |
| cy_card[card_no].base_addr = NULL; |
| free_irq(irq, &cy_card[card_no]); |
| err_unmap: |
| iounmap(addr0); |
| if (addr2) |
| iounmap(addr2); |
| err_reg: |
| pci_release_regions(pdev); |
| err_dis: |
| pci_disable_device(pdev); |
| err: |
| return retval; |
| } |
| |
| static void __devexit cy_pci_remove(struct pci_dev *pdev) |
| { |
| struct cyclades_card *cinfo = pci_get_drvdata(pdev); |
| unsigned int i; |
| |
| /* non-Z with old PLX */ |
| if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) == |
| PLX_9050) |
| cy_writeb(cinfo->ctl_addr + 0x4c, 0); |
| else |
| #ifndef CONFIG_CYZ_INTR |
| if (!IS_CYC_Z(*cinfo)) |
| #endif |
| cy_writew(cinfo->ctl_addr + 0x68, |
| readw(cinfo->ctl_addr + 0x68) & ~0x0900); |
| |
| iounmap(cinfo->base_addr); |
| if (cinfo->ctl_addr) |
| iounmap(cinfo->ctl_addr); |
| if (cinfo->irq |
| #ifndef CONFIG_CYZ_INTR |
| && !IS_CYC_Z(*cinfo) |
| #endif /* CONFIG_CYZ_INTR */ |
| ) |
| free_irq(cinfo->irq, cinfo); |
| pci_release_regions(pdev); |
| |
| cinfo->base_addr = NULL; |
| for (i = cinfo->first_line; i < cinfo->first_line + |
| cinfo->nports; i++) |
| tty_unregister_device(cy_serial_driver, i); |
| cinfo->nports = 0; |
| kfree(cinfo->ports); |
| } |
| |
| static struct pci_driver cy_pci_driver = { |
| .name = "cyclades", |
| .id_table = cy_pci_dev_id, |
| .probe = cy_pci_probe, |
| .remove = __devexit_p(cy_pci_remove) |
| }; |
| #endif |
| |
| static int |
| cyclades_get_proc_info(char *buf, char **start, off_t offset, int length, |
| int *eof, void *data) |
| { |
| struct cyclades_port *info; |
| unsigned int i, j; |
| int len = 0; |
| off_t begin = 0; |
| off_t pos = 0; |
| int size; |
| __u32 cur_jifs = jiffies; |
| |
| size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn " |
| "IdleIn Overruns Ldisc\n"); |
| |
| pos += size; |
| len += size; |
| |
| /* Output one line for each known port */ |
| for (i = 0; i < NR_CARDS; i++) |
| for (j = 0; j < cy_card[i].nports; j++) { |
| info = &cy_card[i].ports[j]; |
| |
| if (info->port.count) |
| size = sprintf(buf + len, "%3d %8lu %10lu %8lu " |
| "%10lu %8lu %9lu %6ld\n", info->line, |
| (cur_jifs - info->idle_stats.in_use) / |
| HZ, info->idle_stats.xmit_bytes, |
| (cur_jifs - info->idle_stats.xmit_idle)/ |
| HZ, info->idle_stats.recv_bytes, |
| (cur_jifs - info->idle_stats.recv_idle)/ |
| HZ, info->idle_stats.overruns, |
| /* FIXME: double check locking */ |
| (long)info->port.tty->ldisc.ops->num); |
| else |
| size = sprintf(buf + len, "%3d %8lu %10lu %8lu " |
| "%10lu %8lu %9lu %6ld\n", |
| info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L); |
| len += size; |
| pos = begin + len; |
| |
| if (pos < offset) { |
| len = 0; |
| begin = pos; |
| } |
| if (pos > offset + length) |
| goto done; |
| } |
| *eof = 1; |
| done: |
| *start = buf + (offset - begin); /* Start of wanted data */ |
| len -= (offset - begin); /* Start slop */ |
| if (len > length) |
| len = length; /* Ending slop */ |
| if (len < 0) |
| len = 0; |
| return len; |
| } |
| |
| /* The serial driver boot-time initialization code! |
| Hardware I/O ports are mapped to character special devices on a |
| first found, first allocated manner. That is, this code searches |
| for Cyclom cards in the system. As each is found, it is probed |
| to discover how many chips (and thus how many ports) are present. |
| These ports are mapped to the tty ports 32 and upward in monotonic |
| fashion. If an 8-port card is replaced with a 16-port card, the |
| port mapping on a following card will shift. |
| |
| This approach is different from what is used in the other serial |
| device driver because the Cyclom is more properly a multiplexer, |
| not just an aggregation of serial ports on one card. |
| |
| If there are more cards with more ports than have been |
| statically allocated above, a warning is printed and the |
| extra ports are ignored. |
| */ |
| |
| static const struct tty_operations cy_ops = { |
| .open = cy_open, |
| .close = cy_close, |
| .write = cy_write, |
| .put_char = cy_put_char, |
| .flush_chars = cy_flush_chars, |
| .write_room = cy_write_room, |
| .chars_in_buffer = cy_chars_in_buffer, |
| .flush_buffer = cy_flush_buffer, |
| .ioctl = cy_ioctl, |
| .throttle = cy_throttle, |
| .unthrottle = cy_unthrottle, |
| .set_termios = cy_set_termios, |
| .stop = cy_stop, |
| .start = cy_start, |
| .hangup = cy_hangup, |
| .break_ctl = cy_break, |
| .wait_until_sent = cy_wait_until_sent, |
| .read_proc = cyclades_get_proc_info, |
| .tiocmget = cy_tiocmget, |
| .tiocmset = cy_tiocmset, |
| }; |
| |
| static int __init cy_init(void) |
| { |
| unsigned int nboards; |
| int retval = -ENOMEM; |
| |
| cy_serial_driver = alloc_tty_driver(NR_PORTS); |
| if (!cy_serial_driver) |
| goto err; |
| |
| printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n", |
| __DATE__, __TIME__); |
| |
| /* Initialize the tty_driver structure */ |
| |
| cy_serial_driver->owner = THIS_MODULE; |
| cy_serial_driver->driver_name = "cyclades"; |
| cy_serial_driver->name = "ttyC"; |
| cy_serial_driver->major = CYCLADES_MAJOR; |
| cy_serial_driver->minor_start = 0; |
| cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| cy_serial_driver->subtype = SERIAL_TYPE_NORMAL; |
| cy_serial_driver->init_termios = tty_std_termios; |
| cy_serial_driver->init_termios.c_cflag = |
| B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
| tty_set_operations(cy_serial_driver, &cy_ops); |
| |
| retval = tty_register_driver(cy_serial_driver); |
| if (retval) { |
| printk(KERN_ERR "Couldn't register Cyclades serial driver\n"); |
| goto err_frtty; |
| } |
| |
| /* the code below is responsible to find the boards. Each different |
| type of board has its own detection routine. If a board is found, |
| the next cy_card structure available is set by the detection |
| routine. These functions are responsible for checking the |
| availability of cy_card and cy_port data structures and updating |
| the cy_next_channel. */ |
| |
| /* look for isa boards */ |
| nboards = cy_detect_isa(); |
| |
| #ifdef CONFIG_PCI |
| /* look for pci boards */ |
| retval = pci_register_driver(&cy_pci_driver); |
| if (retval && !nboards) { |
| tty_unregister_driver(cy_serial_driver); |
| goto err_frtty; |
| } |
| #endif |
| |
| return 0; |
| err_frtty: |
| put_tty_driver(cy_serial_driver); |
| err: |
| return retval; |
| } /* cy_init */ |
| |
| static void __exit cy_cleanup_module(void) |
| { |
| struct cyclades_card *card; |
| unsigned int i, e1; |
| |
| #ifndef CONFIG_CYZ_INTR |
| del_timer_sync(&cyz_timerlist); |
| #endif /* CONFIG_CYZ_INTR */ |
| |
| e1 = tty_unregister_driver(cy_serial_driver); |
| if (e1) |
| printk(KERN_ERR "failed to unregister Cyclades serial " |
| "driver(%d)\n", e1); |
| |
| #ifdef CONFIG_PCI |
| pci_unregister_driver(&cy_pci_driver); |
| #endif |
| |
| for (i = 0; i < NR_CARDS; i++) { |
| card = &cy_card[i]; |
| if (card->base_addr) { |
| /* clear interrupt */ |
| cy_writeb(card->base_addr + Cy_ClrIntr, 0); |
| iounmap(card->base_addr); |
| if (card->ctl_addr) |
| iounmap(card->ctl_addr); |
| if (card->irq |
| #ifndef CONFIG_CYZ_INTR |
| && !IS_CYC_Z(*card) |
| #endif /* CONFIG_CYZ_INTR */ |
| ) |
| free_irq(card->irq, card); |
| for (e1 = card->first_line; e1 < card->first_line + |
| card->nports; e1++) |
| tty_unregister_device(cy_serial_driver, e1); |
| kfree(card->ports); |
| } |
| } |
| |
| put_tty_driver(cy_serial_driver); |
| } /* cy_cleanup_module */ |
| |
| module_init(cy_init); |
| module_exit(cy_cleanup_module); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(CY_VERSION); |
