| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * linux/drivers/block/floppy.c |
| * |
| * Copyright (C) 1991, 1992 Linus Torvalds |
| * Copyright (C) 1993, 1994 Alain Knaff |
| * Copyright (C) 1998 Alan Cox |
| */ |
| |
| /* |
| * 02.12.91 - Changed to static variables to indicate need for reset |
| * and recalibrate. This makes some things easier (output_byte reset |
| * checking etc), and means less interrupt jumping in case of errors, |
| * so the code is hopefully easier to understand. |
| */ |
| |
| /* |
| * This file is certainly a mess. I've tried my best to get it working, |
| * but I don't like programming floppies, and I have only one anyway. |
| * Urgel. I should check for more errors, and do more graceful error |
| * recovery. Seems there are problems with several drives. I've tried to |
| * correct them. No promises. |
| */ |
| |
| /* |
| * As with hd.c, all routines within this file can (and will) be called |
| * by interrupts, so extreme caution is needed. A hardware interrupt |
| * handler may not sleep, or a kernel panic will happen. Thus I cannot |
| * call "floppy-on" directly, but have to set a special timer interrupt |
| * etc. |
| */ |
| |
| /* |
| * 28.02.92 - made track-buffering routines, based on the routines written |
| * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus. |
| */ |
| |
| /* |
| * Automatic floppy-detection and formatting written by Werner Almesberger |
| * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with |
| * the floppy-change signal detection. |
| */ |
| |
| /* |
| * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed |
| * FDC data overrun bug, added some preliminary stuff for vertical |
| * recording support. |
| * |
| * 1992/9/17: Added DMA allocation & DMA functions. -- hhb. |
| * |
| * TODO: Errors are still not counted properly. |
| */ |
| |
| /* 1992/9/20 |
| * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl) |
| * modeled after the freeware MS-DOS program fdformat/88 V1.8 by |
| * Christoph H. Hochst\"atter. |
| * I have fixed the shift values to the ones I always use. Maybe a new |
| * ioctl() should be created to be able to modify them. |
| * There is a bug in the driver that makes it impossible to format a |
| * floppy as the first thing after bootup. |
| */ |
| |
| /* |
| * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and |
| * this helped the floppy driver as well. Much cleaner, and still seems to |
| * work. |
| */ |
| |
| /* 1994/6/24 --bbroad-- added the floppy table entries and made |
| * minor modifications to allow 2.88 floppies to be run. |
| */ |
| |
| /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more |
| * disk types. |
| */ |
| |
| /* |
| * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger |
| * format bug fixes, but unfortunately some new bugs too... |
| */ |
| |
| /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write |
| * errors to allow safe writing by specialized programs. |
| */ |
| |
| /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks |
| * by defining bit 1 of the "stretch" parameter to mean put sectors on the |
| * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's |
| * drives are "upside-down"). |
| */ |
| |
| /* |
| * 1995/8/26 -- Andreas Busse -- added Mips support. |
| */ |
| |
| /* |
| * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent |
| * features to asm/floppy.h. |
| */ |
| |
| /* |
| * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support |
| */ |
| |
| /* |
| * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of |
| * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting & |
| * use of '0' for NULL. |
| */ |
| |
| /* |
| * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation |
| * failures. |
| */ |
| |
| /* |
| * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives. |
| */ |
| |
| /* |
| * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24 |
| * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were |
| * being used to store jiffies, which are unsigned longs). |
| */ |
| |
| /* |
| * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br> |
| * - get rid of check_region |
| * - s/suser/capable/ |
| */ |
| |
| /* |
| * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no |
| * floppy controller (lingering task on list after module is gone... boom.) |
| */ |
| |
| /* |
| * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range |
| * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix |
| * requires many non-obvious changes in arch dependent code. |
| */ |
| |
| /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>. |
| * Better audit of register_blkdev. |
| */ |
| |
| #define REALLY_SLOW_IO |
| |
| #define DEBUGT 2 |
| |
| #define DPRINT(format, args...) \ |
| pr_info("floppy%d: " format, current_drive, ##args) |
| |
| #define DCL_DEBUG /* debug disk change line */ |
| #ifdef DCL_DEBUG |
| #define debug_dcl(test, fmt, args...) \ |
| do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0) |
| #else |
| #define debug_dcl(test, fmt, args...) \ |
| do { if (0) DPRINT(fmt, ##args); } while (0) |
| #endif |
| |
| /* do print messages for unexpected interrupts */ |
| static int print_unex = 1; |
| #include <linux/module.h> |
| #include <linux/sched.h> |
| #include <linux/fs.h> |
| #include <linux/kernel.h> |
| #include <linux/timer.h> |
| #include <linux/workqueue.h> |
| #include <linux/fdreg.h> |
| #include <linux/fd.h> |
| #include <linux/hdreg.h> |
| #include <linux/errno.h> |
| #include <linux/slab.h> |
| #include <linux/mm.h> |
| #include <linux/bio.h> |
| #include <linux/string.h> |
| #include <linux/jiffies.h> |
| #include <linux/fcntl.h> |
| #include <linux/delay.h> |
| #include <linux/mc146818rtc.h> /* CMOS defines */ |
| #include <linux/ioport.h> |
| #include <linux/interrupt.h> |
| #include <linux/init.h> |
| #include <linux/major.h> |
| #include <linux/platform_device.h> |
| #include <linux/mod_devicetable.h> |
| #include <linux/mutex.h> |
| #include <linux/io.h> |
| #include <linux/uaccess.h> |
| #include <linux/async.h> |
| #include <linux/compat.h> |
| |
| /* |
| * PS/2 floppies have much slower step rates than regular floppies. |
| * It's been recommended that take about 1/4 of the default speed |
| * in some more extreme cases. |
| */ |
| static DEFINE_MUTEX(floppy_mutex); |
| static int slow_floppy; |
| |
| #include <asm/dma.h> |
| #include <asm/irq.h> |
| |
| static int FLOPPY_IRQ = 6; |
| static int FLOPPY_DMA = 2; |
| static int can_use_virtual_dma = 2; |
| /* ======= |
| * can use virtual DMA: |
| * 0 = use of virtual DMA disallowed by config |
| * 1 = use of virtual DMA prescribed by config |
| * 2 = no virtual DMA preference configured. By default try hard DMA, |
| * but fall back on virtual DMA when not enough memory available |
| */ |
| |
| static int use_virtual_dma; |
| /* ======= |
| * use virtual DMA |
| * 0 using hard DMA |
| * 1 using virtual DMA |
| * This variable is set to virtual when a DMA mem problem arises, and |
| * reset back in floppy_grab_irq_and_dma. |
| * It is not safe to reset it in other circumstances, because the floppy |
| * driver may have several buffers in use at once, and we do currently not |
| * record each buffers capabilities |
| */ |
| |
| static DEFINE_SPINLOCK(floppy_lock); |
| |
| static unsigned short virtual_dma_port = 0x3f0; |
| irqreturn_t floppy_interrupt(int irq, void *dev_id); |
| static int set_dor(int fdc, char mask, char data); |
| |
| #define K_64 0x10000 /* 64KB */ |
| |
| /* the following is the mask of allowed drives. By default units 2 and |
| * 3 of both floppy controllers are disabled, because switching on the |
| * motor of these drives causes system hangs on some PCI computers. drive |
| * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if |
| * a drive is allowed. |
| * |
| * NOTE: This must come before we include the arch floppy header because |
| * some ports reference this variable from there. -DaveM |
| */ |
| |
| static int allowed_drive_mask = 0x33; |
| |
| #include <asm/floppy.h> |
| |
| static int irqdma_allocated; |
| |
| #include <linux/blk-mq.h> |
| #include <linux/blkpg.h> |
| #include <linux/cdrom.h> /* for the compatibility eject ioctl */ |
| #include <linux/completion.h> |
| |
| static LIST_HEAD(floppy_reqs); |
| static struct request *current_req; |
| static int set_next_request(void); |
| |
| #ifndef fd_get_dma_residue |
| #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) |
| #endif |
| |
| /* Dma Memory related stuff */ |
| |
| #ifndef fd_dma_mem_free |
| #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size)) |
| #endif |
| |
| #ifndef fd_dma_mem_alloc |
| #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size)) |
| #endif |
| |
| #ifndef fd_cacheflush |
| #define fd_cacheflush(addr, size) /* nothing... */ |
| #endif |
| |
| static inline void fallback_on_nodma_alloc(char **addr, size_t l) |
| { |
| #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA |
| if (*addr) |
| return; /* we have the memory */ |
| if (can_use_virtual_dma != 2) |
| return; /* no fallback allowed */ |
| pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n"); |
| *addr = (char *)nodma_mem_alloc(l); |
| #else |
| return; |
| #endif |
| } |
| |
| /* End dma memory related stuff */ |
| |
| static unsigned long fake_change; |
| static bool initialized; |
| |
| #define ITYPE(x) (((x) >> 2) & 0x1f) |
| #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) |
| #define UNIT(x) ((x) & 0x03) /* drive on fdc */ |
| #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ |
| /* reverse mapping from unit and fdc to drive */ |
| #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) |
| |
| #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2) |
| #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) |
| |
| /* read/write commands */ |
| #define COMMAND 0 |
| #define DR_SELECT 1 |
| #define TRACK 2 |
| #define HEAD 3 |
| #define SECTOR 4 |
| #define SIZECODE 5 |
| #define SECT_PER_TRACK 6 |
| #define GAP 7 |
| #define SIZECODE2 8 |
| #define NR_RW 9 |
| |
| /* format commands */ |
| #define F_SIZECODE 2 |
| #define F_SECT_PER_TRACK 3 |
| #define F_GAP 4 |
| #define F_FILL 5 |
| #define NR_F 6 |
| |
| /* |
| * Maximum disk size (in kilobytes). |
| * This default is used whenever the current disk size is unknown. |
| * [Now it is rather a minimum] |
| */ |
| #define MAX_DISK_SIZE 4 /* 3984 */ |
| |
| /* |
| * globals used by 'result()' |
| */ |
| static unsigned char reply_buffer[FD_RAW_REPLY_SIZE]; |
| static int inr; /* size of reply buffer, when called from interrupt */ |
| #define ST0 0 |
| #define ST1 1 |
| #define ST2 2 |
| #define ST3 0 /* result of GETSTATUS */ |
| #define R_TRACK 3 |
| #define R_HEAD 4 |
| #define R_SECTOR 5 |
| #define R_SIZECODE 6 |
| |
| #define SEL_DLY (2 * HZ / 100) |
| |
| /* |
| * this struct defines the different floppy drive types. |
| */ |
| static struct { |
| struct floppy_drive_params params; |
| const char *name; /* name printed while booting */ |
| } default_drive_params[] = { |
| /* NOTE: the time values in jiffies should be in msec! |
| CMOS drive type |
| | Maximum data rate supported by drive type |
| | | Head load time, msec |
| | | | Head unload time, msec (not used) |
| | | | | Step rate interval, usec |
| | | | | | Time needed for spinup time (jiffies) |
| | | | | | | Timeout for spinning down (jiffies) |
| | | | | | | | Spindown offset (where disk stops) |
| | | | | | | | | Select delay |
| | | | | | | | | | RPS |
| | | | | | | | | | | Max number of tracks |
| | | | | | | | | | | | Interrupt timeout |
| | | | | | | | | | | | | Max nonintlv. sectors |
| | | | | | | | | | | | | | -Max Errors- flags */ |
| {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, |
| 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, |
| |
| {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, |
| 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ |
| |
| {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, |
| 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ |
| |
| {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, |
| 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ |
| |
| {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, |
| 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ |
| |
| {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, |
| 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ |
| |
| {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, |
| 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ |
| /* | --autodetected formats--- | | | |
| * read_track | | Name printed when booting |
| * | Native format |
| * Frequency of disk change checks */ |
| }; |
| |
| static struct floppy_drive_params drive_params[N_DRIVE]; |
| static struct floppy_drive_struct drive_state[N_DRIVE]; |
| static struct floppy_write_errors write_errors[N_DRIVE]; |
| static struct timer_list motor_off_timer[N_DRIVE]; |
| static struct blk_mq_tag_set tag_sets[N_DRIVE]; |
| static struct gendisk *opened_disk[N_DRIVE]; |
| static DEFINE_MUTEX(open_lock); |
| static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; |
| |
| /* |
| * This struct defines the different floppy types. |
| * |
| * Bit 0 of 'stretch' tells if the tracks need to be doubled for some |
| * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' |
| * tells if the disk is in Commodore 1581 format, which means side 0 sectors |
| * are located on side 1 of the disk but with a side 0 ID, and vice-versa. |
| * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the |
| * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical |
| * side 0 is on physical side 0 (but with the misnamed sector IDs). |
| * 'stretch' should probably be renamed to something more general, like |
| * 'options'. |
| * |
| * Bits 2 through 9 of 'stretch' tell the number of the first sector. |
| * The LSB (bit 2) is flipped. For most disks, the first sector |
| * is 1 (represented by 0x00<<2). For some CP/M and music sampler |
| * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2). |
| * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2). |
| * |
| * Other parameters should be self-explanatory (see also setfdprm(8)). |
| */ |
| /* |
| Size |
| | Sectors per track |
| | | Head |
| | | | Tracks |
| | | | | Stretch |
| | | | | | Gap 1 size |
| | | | | | | Data rate, | 0x40 for perp |
| | | | | | | | Spec1 (stepping rate, head unload |
| | | | | | | | | /fmt gap (gap2) */ |
| static struct floppy_struct floppy_type[32] = { |
| { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ |
| { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ |
| { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ |
| { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ |
| { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ |
| { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ |
| { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ |
| { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ |
| { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ |
| { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */ |
| |
| { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ |
| { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ |
| { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ |
| { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ |
| { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ |
| { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ |
| { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ |
| { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ |
| { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ |
| { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ |
| |
| { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ |
| { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ |
| { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ |
| { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ |
| { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ |
| { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ |
| { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ |
| { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ |
| { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ |
| { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ |
| |
| { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ |
| { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ |
| }; |
| |
| static struct gendisk *disks[N_DRIVE][ARRAY_SIZE(floppy_type)]; |
| |
| #define SECTSIZE (_FD_SECTSIZE(*floppy)) |
| |
| /* Auto-detection: Disk type used until the next media change occurs. */ |
| static struct floppy_struct *current_type[N_DRIVE]; |
| |
| /* |
| * User-provided type information. current_type points to |
| * the respective entry of this array. |
| */ |
| static struct floppy_struct user_params[N_DRIVE]; |
| |
| static sector_t floppy_sizes[256]; |
| |
| static char floppy_device_name[] = "floppy"; |
| |
| /* |
| * The driver is trying to determine the correct media format |
| * while probing is set. rw_interrupt() clears it after a |
| * successful access. |
| */ |
| static int probing; |
| |
| /* Synchronization of FDC access. */ |
| #define FD_COMMAND_NONE -1 |
| #define FD_COMMAND_ERROR 2 |
| #define FD_COMMAND_OKAY 3 |
| |
| static volatile int command_status = FD_COMMAND_NONE; |
| static unsigned long fdc_busy; |
| static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); |
| static DECLARE_WAIT_QUEUE_HEAD(command_done); |
| |
| /* errors encountered on the current (or last) request */ |
| static int floppy_errors; |
| |
| /* Format request descriptor. */ |
| static struct format_descr format_req; |
| |
| /* |
| * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps |
| * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), |
| * H is head unload time (1=16ms, 2=32ms, etc) |
| */ |
| |
| /* |
| * Track buffer |
| * Because these are written to by the DMA controller, they must |
| * not contain a 64k byte boundary crossing, or data will be |
| * corrupted/lost. |
| */ |
| static char *floppy_track_buffer; |
| static int max_buffer_sectors; |
| |
| typedef void (*done_f)(int); |
| static const struct cont_t { |
| void (*interrupt)(void); |
| /* this is called after the interrupt of the |
| * main command */ |
| void (*redo)(void); /* this is called to retry the operation */ |
| void (*error)(void); /* this is called to tally an error */ |
| done_f done; /* this is called to say if the operation has |
| * succeeded/failed */ |
| } *cont; |
| |
| static void floppy_ready(void); |
| static void floppy_start(void); |
| static void process_fd_request(void); |
| static void recalibrate_floppy(void); |
| static void floppy_shutdown(struct work_struct *); |
| |
| static int floppy_request_regions(int); |
| static void floppy_release_regions(int); |
| static int floppy_grab_irq_and_dma(void); |
| static void floppy_release_irq_and_dma(void); |
| |
| /* |
| * The "reset" variable should be tested whenever an interrupt is scheduled, |
| * after the commands have been sent. This is to ensure that the driver doesn't |
| * get wedged when the interrupt doesn't come because of a failed command. |
| * reset doesn't need to be tested before sending commands, because |
| * output_byte is automatically disabled when reset is set. |
| */ |
| static void reset_fdc(void); |
| static int floppy_revalidate(struct gendisk *disk); |
| |
| /* |
| * These are global variables, as that's the easiest way to give |
| * information to interrupts. They are the data used for the current |
| * request. |
| */ |
| #define NO_TRACK -1 |
| #define NEED_1_RECAL -2 |
| #define NEED_2_RECAL -3 |
| |
| static atomic_t usage_count = ATOMIC_INIT(0); |
| |
| /* buffer related variables */ |
| static int buffer_track = -1; |
| static int buffer_drive = -1; |
| static int buffer_min = -1; |
| static int buffer_max = -1; |
| |
| /* fdc related variables, should end up in a struct */ |
| static struct floppy_fdc_state fdc_state[N_FDC]; |
| static int current_fdc; /* current fdc */ |
| |
| static struct workqueue_struct *floppy_wq; |
| |
| static struct floppy_struct *_floppy = floppy_type; |
| static unsigned char current_drive; |
| static long current_count_sectors; |
| static unsigned char fsector_t; /* sector in track */ |
| static unsigned char in_sector_offset; /* offset within physical sector, |
| * expressed in units of 512 bytes */ |
| |
| static inline unsigned char fdc_inb(int fdc, int reg) |
| { |
| return fd_inb(fdc_state[fdc].address, reg); |
| } |
| |
| static inline void fdc_outb(unsigned char value, int fdc, int reg) |
| { |
| fd_outb(value, fdc_state[fdc].address, reg); |
| } |
| |
| static inline bool drive_no_geom(int drive) |
| { |
| return !current_type[drive] && !ITYPE(drive_state[drive].fd_device); |
| } |
| |
| #ifndef fd_eject |
| static inline int fd_eject(int drive) |
| { |
| return -EINVAL; |
| } |
| #endif |
| |
| /* |
| * Debugging |
| * ========= |
| */ |
| #ifdef DEBUGT |
| static long unsigned debugtimer; |
| |
| static inline void set_debugt(void) |
| { |
| debugtimer = jiffies; |
| } |
| |
| static inline void debugt(const char *func, const char *msg) |
| { |
| if (drive_params[current_drive].flags & DEBUGT) |
| pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer); |
| } |
| #else |
| static inline void set_debugt(void) { } |
| static inline void debugt(const char *func, const char *msg) { } |
| #endif /* DEBUGT */ |
| |
| |
| static DECLARE_DELAYED_WORK(fd_timeout, floppy_shutdown); |
| static const char *timeout_message; |
| |
| static void is_alive(const char *func, const char *message) |
| { |
| /* this routine checks whether the floppy driver is "alive" */ |
| if (test_bit(0, &fdc_busy) && command_status < 2 && |
| !delayed_work_pending(&fd_timeout)) { |
| DPRINT("%s: timeout handler died. %s\n", func, message); |
| } |
| } |
| |
| static void (*do_floppy)(void) = NULL; |
| |
| #define OLOGSIZE 20 |
| |
| static void (*lasthandler)(void); |
| static unsigned long interruptjiffies; |
| static unsigned long resultjiffies; |
| static int resultsize; |
| static unsigned long lastredo; |
| |
| static struct output_log { |
| unsigned char data; |
| unsigned char status; |
| unsigned long jiffies; |
| } output_log[OLOGSIZE]; |
| |
| static int output_log_pos; |
| |
| #define MAXTIMEOUT -2 |
| |
| static void __reschedule_timeout(int drive, const char *message) |
| { |
| unsigned long delay; |
| |
| if (drive < 0 || drive >= N_DRIVE) { |
| delay = 20UL * HZ; |
| drive = 0; |
| } else |
| delay = drive_params[drive].timeout; |
| |
| mod_delayed_work(floppy_wq, &fd_timeout, delay); |
| if (drive_params[drive].flags & FD_DEBUG) |
| DPRINT("reschedule timeout %s\n", message); |
| timeout_message = message; |
| } |
| |
| static void reschedule_timeout(int drive, const char *message) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&floppy_lock, flags); |
| __reschedule_timeout(drive, message); |
| spin_unlock_irqrestore(&floppy_lock, flags); |
| } |
| |
| #define INFBOUND(a, b) (a) = max_t(int, a, b) |
| #define SUPBOUND(a, b) (a) = min_t(int, a, b) |
| |
| /* |
| * Bottom half floppy driver. |
| * ========================== |
| * |
| * This part of the file contains the code talking directly to the hardware, |
| * and also the main service loop (seek-configure-spinup-command) |
| */ |
| |
| /* |
| * disk change. |
| * This routine is responsible for maintaining the FD_DISK_CHANGE flag, |
| * and the last_checked date. |
| * |
| * last_checked is the date of the last check which showed 'no disk change' |
| * FD_DISK_CHANGE is set under two conditions: |
| * 1. The floppy has been changed after some i/o to that floppy already |
| * took place. |
| * 2. No floppy disk is in the drive. This is done in order to ensure that |
| * requests are quickly flushed in case there is no disk in the drive. It |
| * follows that FD_DISK_CHANGE can only be cleared if there is a disk in |
| * the drive. |
| * |
| * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. |
| * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on |
| * each seek. If a disk is present, the disk change line should also be |
| * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk |
| * change line is set, this means either that no disk is in the drive, or |
| * that it has been removed since the last seek. |
| * |
| * This means that we really have a third possibility too: |
| * The floppy has been changed after the last seek. |
| */ |
| |
| static int disk_change(int drive) |
| { |
| int fdc = FDC(drive); |
| |
| if (time_before(jiffies, drive_state[drive].select_date + drive_params[drive].select_delay)) |
| DPRINT("WARNING disk change called early\n"); |
| if (!(fdc_state[fdc].dor & (0x10 << UNIT(drive))) || |
| (fdc_state[fdc].dor & 3) != UNIT(drive) || fdc != FDC(drive)) { |
| DPRINT("probing disk change on unselected drive\n"); |
| DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive), |
| (unsigned int)fdc_state[fdc].dor); |
| } |
| |
| debug_dcl(drive_params[drive].flags, |
| "checking disk change line for drive %d\n", drive); |
| debug_dcl(drive_params[drive].flags, "jiffies=%lu\n", jiffies); |
| debug_dcl(drive_params[drive].flags, "disk change line=%x\n", |
| fdc_inb(fdc, FD_DIR) & 0x80); |
| debug_dcl(drive_params[drive].flags, "flags=%lx\n", |
| drive_state[drive].flags); |
| |
| if (drive_params[drive].flags & FD_BROKEN_DCL) |
| return test_bit(FD_DISK_CHANGED_BIT, |
| &drive_state[drive].flags); |
| if ((fdc_inb(fdc, FD_DIR) ^ drive_params[drive].flags) & 0x80) { |
| set_bit(FD_VERIFY_BIT, &drive_state[drive].flags); |
| /* verify write protection */ |
| |
| if (drive_state[drive].maxblock) /* mark it changed */ |
| set_bit(FD_DISK_CHANGED_BIT, |
| &drive_state[drive].flags); |
| |
| /* invalidate its geometry */ |
| if (drive_state[drive].keep_data >= 0) { |
| if ((drive_params[drive].flags & FTD_MSG) && |
| current_type[drive] != NULL) |
| DPRINT("Disk type is undefined after disk change\n"); |
| current_type[drive] = NULL; |
| floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1; |
| } |
| |
| return 1; |
| } else { |
| drive_state[drive].last_checked = jiffies; |
| clear_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[drive].flags); |
| } |
| return 0; |
| } |
| |
| static inline int is_selected(int dor, int unit) |
| { |
| return ((dor & (0x10 << unit)) && (dor & 3) == unit); |
| } |
| |
| static bool is_ready_state(int status) |
| { |
| int state = status & (STATUS_READY | STATUS_DIR | STATUS_DMA); |
| return state == STATUS_READY; |
| } |
| |
| static int set_dor(int fdc, char mask, char data) |
| { |
| unsigned char unit; |
| unsigned char drive; |
| unsigned char newdor; |
| unsigned char olddor; |
| |
| if (fdc_state[fdc].address == -1) |
| return -1; |
| |
| olddor = fdc_state[fdc].dor; |
| newdor = (olddor & mask) | data; |
| if (newdor != olddor) { |
| unit = olddor & 0x3; |
| if (is_selected(olddor, unit) && !is_selected(newdor, unit)) { |
| drive = REVDRIVE(fdc, unit); |
| debug_dcl(drive_params[drive].flags, |
| "calling disk change from set_dor\n"); |
| disk_change(drive); |
| } |
| fdc_state[fdc].dor = newdor; |
| fdc_outb(newdor, fdc, FD_DOR); |
| |
| unit = newdor & 0x3; |
| if (!is_selected(olddor, unit) && is_selected(newdor, unit)) { |
| drive = REVDRIVE(fdc, unit); |
| drive_state[drive].select_date = jiffies; |
| } |
| } |
| return olddor; |
| } |
| |
| static void twaddle(int fdc, int drive) |
| { |
| if (drive_params[drive].select_delay) |
| return; |
| fdc_outb(fdc_state[fdc].dor & ~(0x10 << UNIT(drive)), |
| fdc, FD_DOR); |
| fdc_outb(fdc_state[fdc].dor, fdc, FD_DOR); |
| drive_state[drive].select_date = jiffies; |
| } |
| |
| /* |
| * Reset all driver information about the specified fdc. |
| * This is needed after a reset, and after a raw command. |
| */ |
| static void reset_fdc_info(int fdc, int mode) |
| { |
| int drive; |
| |
| fdc_state[fdc].spec1 = fdc_state[fdc].spec2 = -1; |
| fdc_state[fdc].need_configure = 1; |
| fdc_state[fdc].perp_mode = 1; |
| fdc_state[fdc].rawcmd = 0; |
| for (drive = 0; drive < N_DRIVE; drive++) |
| if (FDC(drive) == fdc && |
| (mode || drive_state[drive].track != NEED_1_RECAL)) |
| drive_state[drive].track = NEED_2_RECAL; |
| } |
| |
| /* |
| * selects the fdc and drive, and enables the fdc's input/dma. |
| * Both current_drive and current_fdc are changed to match the new drive. |
| */ |
| static void set_fdc(int drive) |
| { |
| unsigned int fdc; |
| |
| if (drive < 0 || drive >= N_DRIVE) { |
| pr_info("bad drive value %d\n", drive); |
| return; |
| } |
| |
| fdc = FDC(drive); |
| if (fdc >= N_FDC) { |
| pr_info("bad fdc value\n"); |
| return; |
| } |
| |
| set_dor(fdc, ~0, 8); |
| #if N_FDC > 1 |
| set_dor(1 - fdc, ~8, 0); |
| #endif |
| if (fdc_state[fdc].rawcmd == 2) |
| reset_fdc_info(fdc, 1); |
| if (fdc_inb(fdc, FD_STATUS) != STATUS_READY) |
| fdc_state[fdc].reset = 1; |
| |
| current_drive = drive; |
| current_fdc = fdc; |
| } |
| |
| /* |
| * locks the driver. |
| * Both current_drive and current_fdc are changed to match the new drive. |
| */ |
| static int lock_fdc(int drive) |
| { |
| if (WARN(atomic_read(&usage_count) == 0, |
| "Trying to lock fdc while usage count=0\n")) |
| return -1; |
| |
| if (wait_event_interruptible(fdc_wait, !test_and_set_bit(0, &fdc_busy))) |
| return -EINTR; |
| |
| command_status = FD_COMMAND_NONE; |
| |
| reschedule_timeout(drive, "lock fdc"); |
| set_fdc(drive); |
| return 0; |
| } |
| |
| /* unlocks the driver */ |
| static void unlock_fdc(void) |
| { |
| if (!test_bit(0, &fdc_busy)) |
| DPRINT("FDC access conflict!\n"); |
| |
| raw_cmd = NULL; |
| command_status = FD_COMMAND_NONE; |
| cancel_delayed_work(&fd_timeout); |
| do_floppy = NULL; |
| cont = NULL; |
| clear_bit(0, &fdc_busy); |
| wake_up(&fdc_wait); |
| } |
| |
| /* switches the motor off after a given timeout */ |
| static void motor_off_callback(struct timer_list *t) |
| { |
| unsigned long nr = t - motor_off_timer; |
| unsigned char mask = ~(0x10 << UNIT(nr)); |
| |
| if (WARN_ON_ONCE(nr >= N_DRIVE)) |
| return; |
| |
| set_dor(FDC(nr), mask, 0); |
| } |
| |
| /* schedules motor off */ |
| static void floppy_off(unsigned int drive) |
| { |
| unsigned long volatile delta; |
| int fdc = FDC(drive); |
| |
| if (!(fdc_state[fdc].dor & (0x10 << UNIT(drive)))) |
| return; |
| |
| del_timer(motor_off_timer + drive); |
| |
| /* make spindle stop in a position which minimizes spinup time |
| * next time */ |
| if (drive_params[drive].rps) { |
| delta = jiffies - drive_state[drive].first_read_date + HZ - |
| drive_params[drive].spindown_offset; |
| delta = ((delta * drive_params[drive].rps) % HZ) / drive_params[drive].rps; |
| motor_off_timer[drive].expires = |
| jiffies + drive_params[drive].spindown - delta; |
| } |
| add_timer(motor_off_timer + drive); |
| } |
| |
| /* |
| * cycle through all N_DRIVE floppy drives, for disk change testing. |
| * stopping at current drive. This is done before any long operation, to |
| * be sure to have up to date disk change information. |
| */ |
| static void scandrives(void) |
| { |
| int i; |
| int drive; |
| int saved_drive; |
| |
| if (drive_params[current_drive].select_delay) |
| return; |
| |
| saved_drive = current_drive; |
| for (i = 0; i < N_DRIVE; i++) { |
| drive = (saved_drive + i + 1) % N_DRIVE; |
| if (drive_state[drive].fd_ref == 0 || drive_params[drive].select_delay != 0) |
| continue; /* skip closed drives */ |
| set_fdc(drive); |
| if (!(set_dor(current_fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & |
| (0x10 << UNIT(drive)))) |
| /* switch the motor off again, if it was off to |
| * begin with */ |
| set_dor(current_fdc, ~(0x10 << UNIT(drive)), 0); |
| } |
| set_fdc(saved_drive); |
| } |
| |
| static void empty(void) |
| { |
| } |
| |
| static void (*floppy_work_fn)(void); |
| |
| static void floppy_work_workfn(struct work_struct *work) |
| { |
| floppy_work_fn(); |
| } |
| |
| static DECLARE_WORK(floppy_work, floppy_work_workfn); |
| |
| static void schedule_bh(void (*handler)(void)) |
| { |
| WARN_ON(work_pending(&floppy_work)); |
| |
| floppy_work_fn = handler; |
| queue_work(floppy_wq, &floppy_work); |
| } |
| |
| static void (*fd_timer_fn)(void) = NULL; |
| |
| static void fd_timer_workfn(struct work_struct *work) |
| { |
| fd_timer_fn(); |
| } |
| |
| static DECLARE_DELAYED_WORK(fd_timer, fd_timer_workfn); |
| |
| static void cancel_activity(void) |
| { |
| do_floppy = NULL; |
| cancel_delayed_work(&fd_timer); |
| cancel_work_sync(&floppy_work); |
| } |
| |
| /* this function makes sure that the disk stays in the drive during the |
| * transfer */ |
| static void fd_watchdog(void) |
| { |
| debug_dcl(drive_params[current_drive].flags, |
| "calling disk change from watchdog\n"); |
| |
| if (disk_change(current_drive)) { |
| DPRINT("disk removed during i/o\n"); |
| cancel_activity(); |
| cont->done(0); |
| reset_fdc(); |
| } else { |
| cancel_delayed_work(&fd_timer); |
| fd_timer_fn = fd_watchdog; |
| queue_delayed_work(floppy_wq, &fd_timer, HZ / 10); |
| } |
| } |
| |
| static void main_command_interrupt(void) |
| { |
| cancel_delayed_work(&fd_timer); |
| cont->interrupt(); |
| } |
| |
| /* waits for a delay (spinup or select) to pass */ |
| static int fd_wait_for_completion(unsigned long expires, |
| void (*function)(void)) |
| { |
| if (fdc_state[current_fdc].reset) { |
| reset_fdc(); /* do the reset during sleep to win time |
| * if we don't need to sleep, it's a good |
| * occasion anyways */ |
| return 1; |
| } |
| |
| if (time_before(jiffies, expires)) { |
| cancel_delayed_work(&fd_timer); |
| fd_timer_fn = function; |
| queue_delayed_work(floppy_wq, &fd_timer, expires - jiffies); |
| return 1; |
| } |
| return 0; |
| } |
| |
| static void setup_DMA(void) |
| { |
| unsigned long f; |
| |
| if (raw_cmd->length == 0) { |
| print_hex_dump(KERN_INFO, "zero dma transfer size: ", |
| DUMP_PREFIX_NONE, 16, 1, |
| raw_cmd->fullcmd, raw_cmd->cmd_count, false); |
| cont->done(0); |
| fdc_state[current_fdc].reset = 1; |
| return; |
| } |
| if (((unsigned long)raw_cmd->kernel_data) % 512) { |
| pr_info("non aligned address: %p\n", raw_cmd->kernel_data); |
| cont->done(0); |
| fdc_state[current_fdc].reset = 1; |
| return; |
| } |
| f = claim_dma_lock(); |
| fd_disable_dma(); |
| #ifdef fd_dma_setup |
| if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length, |
| (raw_cmd->flags & FD_RAW_READ) ? |
| DMA_MODE_READ : DMA_MODE_WRITE, |
| fdc_state[current_fdc].address) < 0) { |
| release_dma_lock(f); |
| cont->done(0); |
| fdc_state[current_fdc].reset = 1; |
| return; |
| } |
| release_dma_lock(f); |
| #else |
| fd_clear_dma_ff(); |
| fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); |
| fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ? |
| DMA_MODE_READ : DMA_MODE_WRITE); |
| fd_set_dma_addr(raw_cmd->kernel_data); |
| fd_set_dma_count(raw_cmd->length); |
| virtual_dma_port = fdc_state[current_fdc].address; |
| fd_enable_dma(); |
| release_dma_lock(f); |
| #endif |
| } |
| |
| static void show_floppy(int fdc); |
| |
| /* waits until the fdc becomes ready */ |
| static int wait_til_ready(int fdc) |
| { |
| int status; |
| int counter; |
| |
| if (fdc_state[fdc].reset) |
| return -1; |
| for (counter = 0; counter < 10000; counter++) { |
| status = fdc_inb(fdc, FD_STATUS); |
| if (status & STATUS_READY) |
| return status; |
| } |
| if (initialized) { |
| DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc); |
| show_floppy(fdc); |
| } |
| fdc_state[fdc].reset = 1; |
| return -1; |
| } |
| |
| /* sends a command byte to the fdc */ |
| static int output_byte(int fdc, char byte) |
| { |
| int status = wait_til_ready(fdc); |
| |
| if (status < 0) |
| return -1; |
| |
| if (is_ready_state(status)) { |
| fdc_outb(byte, fdc, FD_DATA); |
| output_log[output_log_pos].data = byte; |
| output_log[output_log_pos].status = status; |
| output_log[output_log_pos].jiffies = jiffies; |
| output_log_pos = (output_log_pos + 1) % OLOGSIZE; |
| return 0; |
| } |
| fdc_state[fdc].reset = 1; |
| if (initialized) { |
| DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", |
| byte, fdc, status); |
| show_floppy(fdc); |
| } |
| return -1; |
| } |
| |
| /* gets the response from the fdc */ |
| static int result(int fdc) |
| { |
| int i; |
| int status = 0; |
| |
| for (i = 0; i < FD_RAW_REPLY_SIZE; i++) { |
| status = wait_til_ready(fdc); |
| if (status < 0) |
| break; |
| status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA; |
| if ((status & ~STATUS_BUSY) == STATUS_READY) { |
| resultjiffies = jiffies; |
| resultsize = i; |
| return i; |
| } |
| if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY)) |
| reply_buffer[i] = fdc_inb(fdc, FD_DATA); |
| else |
| break; |
| } |
| if (initialized) { |
| DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n", |
| fdc, status, i); |
| show_floppy(fdc); |
| } |
| fdc_state[fdc].reset = 1; |
| return -1; |
| } |
| |
| #define MORE_OUTPUT -2 |
| /* does the fdc need more output? */ |
| static int need_more_output(int fdc) |
| { |
| int status = wait_til_ready(fdc); |
| |
| if (status < 0) |
| return -1; |
| |
| if (is_ready_state(status)) |
| return MORE_OUTPUT; |
| |
| return result(fdc); |
| } |
| |
| /* Set perpendicular mode as required, based on data rate, if supported. |
| * 82077 Now tested. 1Mbps data rate only possible with 82077-1. |
| */ |
| static void perpendicular_mode(int fdc) |
| { |
| unsigned char perp_mode; |
| |
| if (raw_cmd->rate & 0x40) { |
| switch (raw_cmd->rate & 3) { |
| case 0: |
| perp_mode = 2; |
| break; |
| case 3: |
| perp_mode = 3; |
| break; |
| default: |
| DPRINT("Invalid data rate for perpendicular mode!\n"); |
| cont->done(0); |
| fdc_state[fdc].reset = 1; |
| /* |
| * convenient way to return to |
| * redo without too much hassle |
| * (deep stack et al.) |
| */ |
| return; |
| } |
| } else |
| perp_mode = 0; |
| |
| if (fdc_state[fdc].perp_mode == perp_mode) |
| return; |
| if (fdc_state[fdc].version >= FDC_82077_ORIG) { |
| output_byte(fdc, FD_PERPENDICULAR); |
| output_byte(fdc, perp_mode); |
| fdc_state[fdc].perp_mode = perp_mode; |
| } else if (perp_mode) { |
| DPRINT("perpendicular mode not supported by this FDC.\n"); |
| } |
| } /* perpendicular_mode */ |
| |
| static int fifo_depth = 0xa; |
| static int no_fifo; |
| |
| static int fdc_configure(int fdc) |
| { |
| /* Turn on FIFO */ |
| output_byte(fdc, FD_CONFIGURE); |
| if (need_more_output(fdc) != MORE_OUTPUT) |
| return 0; |
| output_byte(fdc, 0); |
| output_byte(fdc, 0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); |
| output_byte(fdc, 0); /* pre-compensation from track 0 upwards */ |
| return 1; |
| } |
| |
| #define NOMINAL_DTR 500 |
| |
| /* Issue a "SPECIFY" command to set the step rate time, head unload time, |
| * head load time, and DMA disable flag to values needed by floppy. |
| * |
| * The value "dtr" is the data transfer rate in Kbps. It is needed |
| * to account for the data rate-based scaling done by the 82072 and 82077 |
| * FDC types. This parameter is ignored for other types of FDCs (i.e. |
| * 8272a). |
| * |
| * Note that changing the data transfer rate has a (probably deleterious) |
| * effect on the parameters subject to scaling for 82072/82077 FDCs, so |
| * fdc_specify is called again after each data transfer rate |
| * change. |
| * |
| * srt: 1000 to 16000 in microseconds |
| * hut: 16 to 240 milliseconds |
| * hlt: 2 to 254 milliseconds |
| * |
| * These values are rounded up to the next highest available delay time. |
| */ |
| static void fdc_specify(int fdc, int drive) |
| { |
| unsigned char spec1; |
| unsigned char spec2; |
| unsigned long srt; |
| unsigned long hlt; |
| unsigned long hut; |
| unsigned long dtr = NOMINAL_DTR; |
| unsigned long scale_dtr = NOMINAL_DTR; |
| int hlt_max_code = 0x7f; |
| int hut_max_code = 0xf; |
| |
| if (fdc_state[fdc].need_configure && |
| fdc_state[fdc].version >= FDC_82072A) { |
| fdc_configure(fdc); |
| fdc_state[fdc].need_configure = 0; |
| } |
| |
| switch (raw_cmd->rate & 0x03) { |
| case 3: |
| dtr = 1000; |
| break; |
| case 1: |
| dtr = 300; |
| if (fdc_state[fdc].version >= FDC_82078) { |
| /* chose the default rate table, not the one |
| * where 1 = 2 Mbps */ |
| output_byte(fdc, FD_DRIVESPEC); |
| if (need_more_output(fdc) == MORE_OUTPUT) { |
| output_byte(fdc, UNIT(drive)); |
| output_byte(fdc, 0xc0); |
| } |
| } |
| break; |
| case 2: |
| dtr = 250; |
| break; |
| } |
| |
| if (fdc_state[fdc].version >= FDC_82072) { |
| scale_dtr = dtr; |
| hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ |
| hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ |
| } |
| |
| /* Convert step rate from microseconds to milliseconds and 4 bits */ |
| srt = 16 - DIV_ROUND_UP(drive_params[drive].srt * scale_dtr / 1000, |
| NOMINAL_DTR); |
| if (slow_floppy) |
| srt = srt / 4; |
| |
| SUPBOUND(srt, 0xf); |
| INFBOUND(srt, 0); |
| |
| hlt = DIV_ROUND_UP(drive_params[drive].hlt * scale_dtr / 2, |
| NOMINAL_DTR); |
| if (hlt < 0x01) |
| hlt = 0x01; |
| else if (hlt > 0x7f) |
| hlt = hlt_max_code; |
| |
| hut = DIV_ROUND_UP(drive_params[drive].hut * scale_dtr / 16, |
| NOMINAL_DTR); |
| if (hut < 0x1) |
| hut = 0x1; |
| else if (hut > 0xf) |
| hut = hut_max_code; |
| |
| spec1 = (srt << 4) | hut; |
| spec2 = (hlt << 1) | (use_virtual_dma & 1); |
| |
| /* If these parameters did not change, just return with success */ |
| if (fdc_state[fdc].spec1 != spec1 || |
| fdc_state[fdc].spec2 != spec2) { |
| /* Go ahead and set spec1 and spec2 */ |
| output_byte(fdc, FD_SPECIFY); |
| output_byte(fdc, fdc_state[fdc].spec1 = spec1); |
| output_byte(fdc, fdc_state[fdc].spec2 = spec2); |
| } |
| } /* fdc_specify */ |
| |
| /* Set the FDC's data transfer rate on behalf of the specified drive. |
| * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue |
| * of the specify command (i.e. using the fdc_specify function). |
| */ |
| static int fdc_dtr(void) |
| { |
| /* If data rate not already set to desired value, set it. */ |
| if ((raw_cmd->rate & 3) == fdc_state[current_fdc].dtr) |
| return 0; |
| |
| /* Set dtr */ |
| fdc_outb(raw_cmd->rate & 3, current_fdc, FD_DCR); |
| |
| /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) |
| * need a stabilization period of several milliseconds to be |
| * enforced after data rate changes before R/W operations. |
| * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) |
| */ |
| fdc_state[current_fdc].dtr = raw_cmd->rate & 3; |
| return fd_wait_for_completion(jiffies + 2UL * HZ / 100, floppy_ready); |
| } /* fdc_dtr */ |
| |
| static void tell_sector(void) |
| { |
| pr_cont(": track %d, head %d, sector %d, size %d", |
| reply_buffer[R_TRACK], reply_buffer[R_HEAD], |
| reply_buffer[R_SECTOR], |
| reply_buffer[R_SIZECODE]); |
| } /* tell_sector */ |
| |
| static void print_errors(void) |
| { |
| DPRINT(""); |
| if (reply_buffer[ST0] & ST0_ECE) { |
| pr_cont("Recalibrate failed!"); |
| } else if (reply_buffer[ST2] & ST2_CRC) { |
| pr_cont("data CRC error"); |
| tell_sector(); |
| } else if (reply_buffer[ST1] & ST1_CRC) { |
| pr_cont("CRC error"); |
| tell_sector(); |
| } else if ((reply_buffer[ST1] & (ST1_MAM | ST1_ND)) || |
| (reply_buffer[ST2] & ST2_MAM)) { |
| if (!probing) { |
| pr_cont("sector not found"); |
| tell_sector(); |
| } else |
| pr_cont("probe failed..."); |
| } else if (reply_buffer[ST2] & ST2_WC) { /* seek error */ |
| pr_cont("wrong cylinder"); |
| } else if (reply_buffer[ST2] & ST2_BC) { /* cylinder marked as bad */ |
| pr_cont("bad cylinder"); |
| } else { |
| pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", |
| reply_buffer[ST0], reply_buffer[ST1], |
| reply_buffer[ST2]); |
| tell_sector(); |
| } |
| pr_cont("\n"); |
| } |
| |
| /* |
| * OK, this error interpreting routine is called after a |
| * DMA read/write has succeeded |
| * or failed, so we check the results, and copy any buffers. |
| * hhb: Added better error reporting. |
| * ak: Made this into a separate routine. |
| */ |
| static int interpret_errors(void) |
| { |
| char bad; |
| |
| if (inr != 7) { |
| DPRINT("-- FDC reply error\n"); |
| fdc_state[current_fdc].reset = 1; |
| return 1; |
| } |
| |
| /* check IC to find cause of interrupt */ |
| switch (reply_buffer[ST0] & ST0_INTR) { |
| case 0x40: /* error occurred during command execution */ |
| if (reply_buffer[ST1] & ST1_EOC) |
| return 0; /* occurs with pseudo-DMA */ |
| bad = 1; |
| if (reply_buffer[ST1] & ST1_WP) { |
| DPRINT("Drive is write protected\n"); |
| clear_bit(FD_DISK_WRITABLE_BIT, |
| &drive_state[current_drive].flags); |
| cont->done(0); |
| bad = 2; |
| } else if (reply_buffer[ST1] & ST1_ND) { |
| set_bit(FD_NEED_TWADDLE_BIT, |
| &drive_state[current_drive].flags); |
| } else if (reply_buffer[ST1] & ST1_OR) { |
| if (drive_params[current_drive].flags & FTD_MSG) |
| DPRINT("Over/Underrun - retrying\n"); |
| bad = 0; |
| } else if (floppy_errors >= drive_params[current_drive].max_errors.reporting) { |
| print_errors(); |
| } |
| if (reply_buffer[ST2] & ST2_WC || reply_buffer[ST2] & ST2_BC) |
| /* wrong cylinder => recal */ |
| drive_state[current_drive].track = NEED_2_RECAL; |
| return bad; |
| case 0x80: /* invalid command given */ |
| DPRINT("Invalid FDC command given!\n"); |
| cont->done(0); |
| return 2; |
| case 0xc0: |
| DPRINT("Abnormal termination caused by polling\n"); |
| cont->error(); |
| return 2; |
| default: /* (0) Normal command termination */ |
| return 0; |
| } |
| } |
| |
| /* |
| * This routine is called when everything should be correctly set up |
| * for the transfer (i.e. floppy motor is on, the correct floppy is |
| * selected, and the head is sitting on the right track). |
| */ |
| static void setup_rw_floppy(void) |
| { |
| int i; |
| int r; |
| int flags; |
| unsigned long ready_date; |
| void (*function)(void); |
| |
| flags = raw_cmd->flags; |
| if (flags & (FD_RAW_READ | FD_RAW_WRITE)) |
| flags |= FD_RAW_INTR; |
| |
| if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) { |
| ready_date = drive_state[current_drive].spinup_date + drive_params[current_drive].spinup; |
| /* If spinup will take a long time, rerun scandrives |
| * again just before spinup completion. Beware that |
| * after scandrives, we must again wait for selection. |
| */ |
| if (time_after(ready_date, jiffies + drive_params[current_drive].select_delay)) { |
| ready_date -= drive_params[current_drive].select_delay; |
| function = floppy_start; |
| } else |
| function = setup_rw_floppy; |
| |
| /* wait until the floppy is spinning fast enough */ |
| if (fd_wait_for_completion(ready_date, function)) |
| return; |
| } |
| if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) |
| setup_DMA(); |
| |
| if (flags & FD_RAW_INTR) |
| do_floppy = main_command_interrupt; |
| |
| r = 0; |
| for (i = 0; i < raw_cmd->cmd_count; i++) |
| r |= output_byte(current_fdc, raw_cmd->fullcmd[i]); |
| |
| debugt(__func__, "rw_command"); |
| |
| if (r) { |
| cont->error(); |
| reset_fdc(); |
| return; |
| } |
| |
| if (!(flags & FD_RAW_INTR)) { |
| inr = result(current_fdc); |
| cont->interrupt(); |
| } else if (flags & FD_RAW_NEED_DISK) |
| fd_watchdog(); |
| } |
| |
| static int blind_seek; |
| |
| /* |
| * This is the routine called after every seek (or recalibrate) interrupt |
| * from the floppy controller. |
| */ |
| static void seek_interrupt(void) |
| { |
| debugt(__func__, ""); |
| if (inr != 2 || (reply_buffer[ST0] & 0xF8) != 0x20) { |
| DPRINT("seek failed\n"); |
| drive_state[current_drive].track = NEED_2_RECAL; |
| cont->error(); |
| cont->redo(); |
| return; |
| } |
| if (drive_state[current_drive].track >= 0 && |
| drive_state[current_drive].track != reply_buffer[ST1] && |
| !blind_seek) { |
| debug_dcl(drive_params[current_drive].flags, |
| "clearing NEWCHANGE flag because of effective seek\n"); |
| debug_dcl(drive_params[current_drive].flags, "jiffies=%lu\n", |
| jiffies); |
| clear_bit(FD_DISK_NEWCHANGE_BIT, |
| &drive_state[current_drive].flags); |
| /* effective seek */ |
| drive_state[current_drive].select_date = jiffies; |
| } |
| drive_state[current_drive].track = reply_buffer[ST1]; |
| floppy_ready(); |
| } |
| |
| static void check_wp(int fdc, int drive) |
| { |
| if (test_bit(FD_VERIFY_BIT, &drive_state[drive].flags)) { |
| /* check write protection */ |
| output_byte(fdc, FD_GETSTATUS); |
| output_byte(fdc, UNIT(drive)); |
| if (result(fdc) != 1) { |
| fdc_state[fdc].reset = 1; |
| return; |
| } |
| clear_bit(FD_VERIFY_BIT, &drive_state[drive].flags); |
| clear_bit(FD_NEED_TWADDLE_BIT, |
| &drive_state[drive].flags); |
| debug_dcl(drive_params[drive].flags, |
| "checking whether disk is write protected\n"); |
| debug_dcl(drive_params[drive].flags, "wp=%x\n", |
| reply_buffer[ST3] & 0x40); |
| if (!(reply_buffer[ST3] & 0x40)) |
| set_bit(FD_DISK_WRITABLE_BIT, |
| &drive_state[drive].flags); |
| else |
| clear_bit(FD_DISK_WRITABLE_BIT, |
| &drive_state[drive].flags); |
| } |
| } |
| |
| static void seek_floppy(void) |
| { |
| int track; |
| |
| blind_seek = 0; |
| |
| debug_dcl(drive_params[current_drive].flags, |
| "calling disk change from %s\n", __func__); |
| |
| if (!test_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[current_drive].flags) && |
| disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) { |
| /* the media changed flag should be cleared after the seek. |
| * If it isn't, this means that there is really no disk in |
| * the drive. |
| */ |
| set_bit(FD_DISK_CHANGED_BIT, |
| &drive_state[current_drive].flags); |
| cont->done(0); |
| cont->redo(); |
| return; |
| } |
| if (drive_state[current_drive].track <= NEED_1_RECAL) { |
| recalibrate_floppy(); |
| return; |
| } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[current_drive].flags) && |
| (raw_cmd->flags & FD_RAW_NEED_DISK) && |
| (drive_state[current_drive].track <= NO_TRACK || drive_state[current_drive].track == raw_cmd->track)) { |
| /* we seek to clear the media-changed condition. Does anybody |
| * know a more elegant way, which works on all drives? */ |
| if (raw_cmd->track) |
| track = raw_cmd->track - 1; |
| else { |
| if (drive_params[current_drive].flags & FD_SILENT_DCL_CLEAR) { |
| set_dor(current_fdc, ~(0x10 << UNIT(current_drive)), 0); |
| blind_seek = 1; |
| raw_cmd->flags |= FD_RAW_NEED_SEEK; |
| } |
| track = 1; |
| } |
| } else { |
| check_wp(current_fdc, current_drive); |
| if (raw_cmd->track != drive_state[current_drive].track && |
| (raw_cmd->flags & FD_RAW_NEED_SEEK)) |
| track = raw_cmd->track; |
| else { |
| setup_rw_floppy(); |
| return; |
| } |
| } |
| |
| do_floppy = seek_interrupt; |
| output_byte(current_fdc, FD_SEEK); |
| output_byte(current_fdc, UNIT(current_drive)); |
| if (output_byte(current_fdc, track) < 0) { |
| reset_fdc(); |
| return; |
| } |
| debugt(__func__, ""); |
| } |
| |
| static void recal_interrupt(void) |
| { |
| debugt(__func__, ""); |
| if (inr != 2) |
| fdc_state[current_fdc].reset = 1; |
| else if (reply_buffer[ST0] & ST0_ECE) { |
| switch (drive_state[current_drive].track) { |
| case NEED_1_RECAL: |
| debugt(__func__, "need 1 recal"); |
| /* after a second recalibrate, we still haven't |
| * reached track 0. Probably no drive. Raise an |
| * error, as failing immediately might upset |
| * computers possessed by the Devil :-) */ |
| cont->error(); |
| cont->redo(); |
| return; |
| case NEED_2_RECAL: |
| debugt(__func__, "need 2 recal"); |
| /* If we already did a recalibrate, |
| * and we are not at track 0, this |
| * means we have moved. (The only way |
| * not to move at recalibration is to |
| * be already at track 0.) Clear the |
| * new change flag */ |
| debug_dcl(drive_params[current_drive].flags, |
| "clearing NEWCHANGE flag because of second recalibrate\n"); |
| |
| clear_bit(FD_DISK_NEWCHANGE_BIT, |
| &drive_state[current_drive].flags); |
| drive_state[current_drive].select_date = jiffies; |
| fallthrough; |
| default: |
| debugt(__func__, "default"); |
| /* Recalibrate moves the head by at |
| * most 80 steps. If after one |
| * recalibrate we don't have reached |
| * track 0, this might mean that we |
| * started beyond track 80. Try |
| * again. */ |
| drive_state[current_drive].track = NEED_1_RECAL; |
| break; |
| } |
| } else |
| drive_state[current_drive].track = reply_buffer[ST1]; |
| floppy_ready(); |
| } |
| |
| static void print_result(char *message, int inr) |
| { |
| int i; |
| |
| DPRINT("%s ", message); |
| if (inr >= 0) |
| for (i = 0; i < inr; i++) |
| pr_cont("repl[%d]=%x ", i, reply_buffer[i]); |
| pr_cont("\n"); |
| } |
| |
| /* interrupt handler. Note that this can be called externally on the Sparc */ |
| irqreturn_t floppy_interrupt(int irq, void *dev_id) |
| { |
| int do_print; |
| unsigned long f; |
| void (*handler)(void) = do_floppy; |
| |
| lasthandler = handler; |
| interruptjiffies = jiffies; |
| |
| f = claim_dma_lock(); |
| fd_disable_dma(); |
| release_dma_lock(f); |
| |
| do_floppy = NULL; |
| if (current_fdc >= N_FDC || fdc_state[current_fdc].address == -1) { |
| /* we don't even know which FDC is the culprit */ |
| pr_info("DOR0=%x\n", fdc_state[0].dor); |
| pr_info("floppy interrupt on bizarre fdc %d\n", current_fdc); |
| pr_info("handler=%ps\n", handler); |
| is_alive(__func__, "bizarre fdc"); |
| return IRQ_NONE; |
| } |
| |
| fdc_state[current_fdc].reset = 0; |
| /* We have to clear the reset flag here, because apparently on boxes |
| * with level triggered interrupts (PS/2, Sparc, ...), it is needed to |
| * emit SENSEI's to clear the interrupt line. And fdc_state[fdc].reset |
| * blocks the emission of the SENSEI's. |
| * It is OK to emit floppy commands because we are in an interrupt |
| * handler here, and thus we have to fear no interference of other |
| * activity. |
| */ |
| |
| do_print = !handler && print_unex && initialized; |
| |
| inr = result(current_fdc); |
| if (do_print) |
| print_result("unexpected interrupt", inr); |
| if (inr == 0) { |
| int max_sensei = 4; |
| do { |
| output_byte(current_fdc, FD_SENSEI); |
| inr = result(current_fdc); |
| if (do_print) |
| print_result("sensei", inr); |
| max_sensei--; |
| } while ((reply_buffer[ST0] & 0x83) != UNIT(current_drive) && |
| inr == 2 && max_sensei); |
| } |
| if (!handler) { |
| fdc_state[current_fdc].reset = 1; |
| return IRQ_NONE; |
| } |
| schedule_bh(handler); |
| is_alive(__func__, "normal interrupt end"); |
| |
| /* FIXME! Was it really for us? */ |
| return IRQ_HANDLED; |
| } |
| |
| static void recalibrate_floppy(void) |
| { |
| debugt(__func__, ""); |
| do_floppy = recal_interrupt; |
| output_byte(current_fdc, FD_RECALIBRATE); |
| if (output_byte(current_fdc, UNIT(current_drive)) < 0) |
| reset_fdc(); |
| } |
| |
| /* |
| * Must do 4 FD_SENSEIs after reset because of ``drive polling''. |
| */ |
| static void reset_interrupt(void) |
| { |
| debugt(__func__, ""); |
| result(current_fdc); /* get the status ready for set_fdc */ |
| if (fdc_state[current_fdc].reset) { |
| pr_info("reset set in interrupt, calling %ps\n", cont->error); |
| cont->error(); /* a reset just after a reset. BAD! */ |
| } |
| cont->redo(); |
| } |
| |
| /* |
| * reset is done by pulling bit 2 of DOR low for a while (old FDCs), |
| * or by setting the self clearing bit 7 of STATUS (newer FDCs). |
| * This WILL trigger an interrupt, causing the handlers in the current |
| * cont's ->redo() to be called via reset_interrupt(). |
| */ |
| static void reset_fdc(void) |
| { |
| unsigned long flags; |
| |
| do_floppy = reset_interrupt; |
| fdc_state[current_fdc].reset = 0; |
| reset_fdc_info(current_fdc, 0); |
| |
| /* Pseudo-DMA may intercept 'reset finished' interrupt. */ |
| /* Irrelevant for systems with true DMA (i386). */ |
| |
| flags = claim_dma_lock(); |
| fd_disable_dma(); |
| release_dma_lock(flags); |
| |
| if (fdc_state[current_fdc].version >= FDC_82072A) |
| fdc_outb(0x80 | (fdc_state[current_fdc].dtr & 3), |
| current_fdc, FD_STATUS); |
| else { |
| fdc_outb(fdc_state[current_fdc].dor & ~0x04, current_fdc, FD_DOR); |
| udelay(FD_RESET_DELAY); |
| fdc_outb(fdc_state[current_fdc].dor, current_fdc, FD_DOR); |
| } |
| } |
| |
| static void show_floppy(int fdc) |
| { |
| int i; |
| |
| pr_info("\n"); |
| pr_info("floppy driver state\n"); |
| pr_info("-------------------\n"); |
| pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%ps\n", |
| jiffies, interruptjiffies, jiffies - interruptjiffies, |
| lasthandler); |
| |
| pr_info("timeout_message=%s\n", timeout_message); |
| pr_info("last output bytes:\n"); |
| for (i = 0; i < OLOGSIZE; i++) |
| pr_info("%2x %2x %lu\n", |
| output_log[(i + output_log_pos) % OLOGSIZE].data, |
| output_log[(i + output_log_pos) % OLOGSIZE].status, |
| output_log[(i + output_log_pos) % OLOGSIZE].jiffies); |
| pr_info("last result at %lu\n", resultjiffies); |
| pr_info("last redo_fd_request at %lu\n", lastredo); |
| print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, |
| reply_buffer, resultsize, true); |
| |
| pr_info("status=%x\n", fdc_inb(fdc, FD_STATUS)); |
| pr_info("fdc_busy=%lu\n", fdc_busy); |
| if (do_floppy) |
| pr_info("do_floppy=%ps\n", do_floppy); |
| if (work_pending(&floppy_work)) |
| pr_info("floppy_work.func=%ps\n", floppy_work.func); |
| if (delayed_work_pending(&fd_timer)) |
| pr_info("delayed work.function=%p expires=%ld\n", |
| fd_timer.work.func, |
| fd_timer.timer.expires - jiffies); |
| if (delayed_work_pending(&fd_timeout)) |
| pr_info("timer_function=%p expires=%ld\n", |
| fd_timeout.work.func, |
| fd_timeout.timer.expires - jiffies); |
| |
| pr_info("cont=%p\n", cont); |
| pr_info("current_req=%p\n", current_req); |
| pr_info("command_status=%d\n", command_status); |
| pr_info("\n"); |
| } |
| |
| static void floppy_shutdown(struct work_struct *arg) |
| { |
| unsigned long flags; |
| |
| if (initialized) |
| show_floppy(current_fdc); |
| cancel_activity(); |
| |
| flags = claim_dma_lock(); |
| fd_disable_dma(); |
| release_dma_lock(flags); |
| |
| /* avoid dma going to a random drive after shutdown */ |
| |
| if (initialized) |
| DPRINT("floppy timeout called\n"); |
| fdc_state[current_fdc].reset = 1; |
| if (cont) { |
| cont->done(0); |
| cont->redo(); /* this will recall reset when needed */ |
| } else { |
| pr_info("no cont in shutdown!\n"); |
| process_fd_request(); |
| } |
| is_alive(__func__, ""); |
| } |
| |
| /* start motor, check media-changed condition and write protection */ |
| static int start_motor(void (*function)(void)) |
| { |
| int mask; |
| int data; |
| |
| mask = 0xfc; |
| data = UNIT(current_drive); |
| if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) { |
| if (!(fdc_state[current_fdc].dor & (0x10 << UNIT(current_drive)))) { |
| set_debugt(); |
| /* no read since this drive is running */ |
| drive_state[current_drive].first_read_date = 0; |
| /* note motor start time if motor is not yet running */ |
| drive_state[current_drive].spinup_date = jiffies; |
| data |= (0x10 << UNIT(current_drive)); |
| } |
| } else if (fdc_state[current_fdc].dor & (0x10 << UNIT(current_drive))) |
| mask &= ~(0x10 << UNIT(current_drive)); |
| |
| /* starts motor and selects floppy */ |
| del_timer(motor_off_timer + current_drive); |
| set_dor(current_fdc, mask, data); |
| |
| /* wait_for_completion also schedules reset if needed. */ |
| return fd_wait_for_completion(drive_state[current_drive].select_date + drive_params[current_drive].select_delay, |
| function); |
| } |
| |
| static void floppy_ready(void) |
| { |
| if (fdc_state[current_fdc].reset) { |
| reset_fdc(); |
| return; |
| } |
| if (start_motor(floppy_ready)) |
| return; |
| if (fdc_dtr()) |
| return; |
| |
| debug_dcl(drive_params[current_drive].flags, |
| "calling disk change from floppy_ready\n"); |
| if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && |
| disk_change(current_drive) && !drive_params[current_drive].select_delay) |
| twaddle(current_fdc, current_drive); /* this clears the dcl on certain |
| * drive/controller combinations */ |
| |
| #ifdef fd_chose_dma_mode |
| if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) { |
| unsigned long flags = claim_dma_lock(); |
| fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length); |
| release_dma_lock(flags); |
| } |
| #endif |
| |
| if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) { |
| perpendicular_mode(current_fdc); |
| fdc_specify(current_fdc, current_drive); /* must be done here because of hut, hlt ... */ |
| seek_floppy(); |
| } else { |
| if ((raw_cmd->flags & FD_RAW_READ) || |
| (raw_cmd->flags & FD_RAW_WRITE)) |
| fdc_specify(current_fdc, current_drive); |
| setup_rw_floppy(); |
| } |
| } |
| |
| static void floppy_start(void) |
| { |
| reschedule_timeout(current_drive, "floppy start"); |
| |
| scandrives(); |
| debug_dcl(drive_params[current_drive].flags, |
| "setting NEWCHANGE in floppy_start\n"); |
| set_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[current_drive].flags); |
| floppy_ready(); |
| } |
| |
| /* |
| * ======================================================================== |
| * here ends the bottom half. Exported routines are: |
| * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, |
| * start_motor, reset_fdc, reset_fdc_info, interpret_errors. |
| * Initialization also uses output_byte, result, set_dor, floppy_interrupt |
| * and set_dor. |
| * ======================================================================== |
| */ |
| /* |
| * General purpose continuations. |
| * ============================== |
| */ |
| |
| static void do_wakeup(void) |
| { |
| reschedule_timeout(MAXTIMEOUT, "do wakeup"); |
| cont = NULL; |
| command_status += 2; |
| wake_up(&command_done); |
| } |
| |
| static const struct cont_t wakeup_cont = { |
| .interrupt = empty, |
| .redo = do_wakeup, |
| .error = empty, |
| .done = (done_f)empty |
| }; |
| |
| static const struct cont_t intr_cont = { |
| .interrupt = empty, |
| .redo = process_fd_request, |
| .error = empty, |
| .done = (done_f)empty |
| }; |
| |
| /* schedules handler, waiting for completion. May be interrupted, will then |
| * return -EINTR, in which case the driver will automatically be unlocked. |
| */ |
| static int wait_til_done(void (*handler)(void), bool interruptible) |
| { |
| int ret; |
| |
| schedule_bh(handler); |
| |
| if (interruptible) |
| wait_event_interruptible(command_done, command_status >= 2); |
| else |
| wait_event(command_done, command_status >= 2); |
| |
| if (command_status < 2) { |
| cancel_activity(); |
| cont = &intr_cont; |
| reset_fdc(); |
| return -EINTR; |
| } |
| |
| if (fdc_state[current_fdc].reset) |
| command_status = FD_COMMAND_ERROR; |
| if (command_status == FD_COMMAND_OKAY) |
| ret = 0; |
| else |
| ret = -EIO; |
| command_status = FD_COMMAND_NONE; |
| return ret; |
| } |
| |
| static void generic_done(int result) |
| { |
| command_status = result; |
| cont = &wakeup_cont; |
| } |
| |
| static void generic_success(void) |
| { |
| cont->done(1); |
| } |
| |
| static void generic_failure(void) |
| { |
| cont->done(0); |
| } |
| |
| static void success_and_wakeup(void) |
| { |
| generic_success(); |
| cont->redo(); |
| } |
| |
| /* |
| * formatting and rw support. |
| * ========================== |
| */ |
| |
| static int next_valid_format(int drive) |
| { |
| int probed_format; |
| |
| probed_format = drive_state[drive].probed_format; |
| while (1) { |
| if (probed_format >= FD_AUTODETECT_SIZE || |
| !drive_params[drive].autodetect[probed_format]) { |
| drive_state[drive].probed_format = 0; |
| return 1; |
| } |
| if (floppy_type[drive_params[drive].autodetect[probed_format]].sect) { |
| drive_state[drive].probed_format = probed_format; |
| return 0; |
| } |
| probed_format++; |
| } |
| } |
| |
| static void bad_flp_intr(void) |
| { |
| int err_count; |
| |
| if (probing) { |
| drive_state[current_drive].probed_format++; |
| if (!next_valid_format(current_drive)) |
| return; |
| } |
| err_count = ++floppy_errors; |
| INFBOUND(write_errors[current_drive].badness, err_count); |
| if (err_count > drive_params[current_drive].max_errors.abort) |
| cont->done(0); |
| if (err_count > drive_params[current_drive].max_errors.reset) |
| fdc_state[current_fdc].reset = 1; |
| else if (err_count > drive_params[current_drive].max_errors.recal) |
| drive_state[current_drive].track = NEED_2_RECAL; |
| } |
| |
| static void set_floppy(int drive) |
| { |
| int type = ITYPE(drive_state[drive].fd_device); |
| |
| if (type) |
| _floppy = floppy_type + type; |
| else |
| _floppy = current_type[drive]; |
| } |
| |
| /* |
| * formatting support. |
| * =================== |
| */ |
| static void format_interrupt(void) |
| { |
| switch (interpret_errors()) { |
| case 1: |
| cont->error(); |
| break; |
| case 2: |
| break; |
| case 0: |
| cont->done(1); |
| } |
| cont->redo(); |
| } |
| |
| #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1)) |
| #define CT(x) ((x) | 0xc0) |
| |
| static void setup_format_params(int track) |
| { |
| int n; |
| int il; |
| int count; |
| int head_shift; |
| int track_shift; |
| struct fparm { |
| unsigned char track, head, sect, size; |
| } *here = (struct fparm *)floppy_track_buffer; |
| |
| raw_cmd = &default_raw_cmd; |
| raw_cmd->track = track; |
| |
| raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | |
| FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK); |
| raw_cmd->rate = _floppy->rate & 0x43; |
| raw_cmd->cmd_count = NR_F; |
| raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_FORMAT); |
| raw_cmd->cmd[DR_SELECT] = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head); |
| raw_cmd->cmd[F_SIZECODE] = FD_SIZECODE(_floppy); |
| raw_cmd->cmd[F_SECT_PER_TRACK] = _floppy->sect << 2 >> raw_cmd->cmd[F_SIZECODE]; |
| raw_cmd->cmd[F_GAP] = _floppy->fmt_gap; |
| raw_cmd->cmd[F_FILL] = FD_FILL_BYTE; |
| |
| raw_cmd->kernel_data = floppy_track_buffer; |
| raw_cmd->length = 4 * raw_cmd->cmd[F_SECT_PER_TRACK]; |
| |
| if (!raw_cmd->cmd[F_SECT_PER_TRACK]) |
| return; |
| |
| /* allow for about 30ms for data transport per track */ |
| head_shift = (raw_cmd->cmd[F_SECT_PER_TRACK] + 5) / 6; |
| |
| /* a ``cylinder'' is two tracks plus a little stepping time */ |
| track_shift = 2 * head_shift + 3; |
| |
| /* position of logical sector 1 on this track */ |
| n = (track_shift * format_req.track + head_shift * format_req.head) |
| % raw_cmd->cmd[F_SECT_PER_TRACK]; |
| |
| /* determine interleave */ |
| il = 1; |
| if (_floppy->fmt_gap < 0x22) |
| il++; |
| |
| /* initialize field */ |
| for (count = 0; count < raw_cmd->cmd[F_SECT_PER_TRACK]; ++count) { |
| here[count].track = format_req.track; |
| here[count].head = format_req.head; |
| here[count].sect = 0; |
| here[count].size = raw_cmd->cmd[F_SIZECODE]; |
| } |
| /* place logical sectors */ |
| for (count = 1; count <= raw_cmd->cmd[F_SECT_PER_TRACK]; ++count) { |
| here[n].sect = count; |
| n = (n + il) % raw_cmd->cmd[F_SECT_PER_TRACK]; |
| if (here[n].sect) { /* sector busy, find next free sector */ |
| ++n; |
| if (n >= raw_cmd->cmd[F_SECT_PER_TRACK]) { |
| n -= raw_cmd->cmd[F_SECT_PER_TRACK]; |
| while (here[n].sect) |
| ++n; |
| } |
| } |
| } |
| if (_floppy->stretch & FD_SECTBASEMASK) { |
| for (count = 0; count < raw_cmd->cmd[F_SECT_PER_TRACK]; count++) |
| here[count].sect += FD_SECTBASE(_floppy) - 1; |
| } |
| } |
| |
| static void redo_format(void) |
| { |
| buffer_track = -1; |
| setup_format_params(format_req.track << STRETCH(_floppy)); |
| floppy_start(); |
| debugt(__func__, "queue format request"); |
| } |
| |
| static const struct cont_t format_cont = { |
| .interrupt = format_interrupt, |
| .redo = redo_format, |
| .error = bad_flp_intr, |
| .done = generic_done |
| }; |
| |
| static int do_format(int drive, struct format_descr *tmp_format_req) |
| { |
| int ret; |
| |
| if (lock_fdc(drive)) |
| return -EINTR; |
| |
| set_floppy(drive); |
| if (!_floppy || |
| _floppy->track > drive_params[current_drive].tracks || |
| tmp_format_req->track >= _floppy->track || |
| tmp_format_req->head >= _floppy->head || |
| (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || |
| !_floppy->fmt_gap) { |
| process_fd_request(); |
| return -EINVAL; |
| } |
| format_req = *tmp_format_req; |
| cont = &format_cont; |
| floppy_errors = 0; |
| ret = wait_til_done(redo_format, true); |
| if (ret == -EINTR) |
| return -EINTR; |
| process_fd_request(); |
| return ret; |
| } |
| |
| /* |
| * Buffer read/write and support |
| * ============================= |
| */ |
| |
| static void floppy_end_request(struct request *req, blk_status_t error) |
| { |
| unsigned int nr_sectors = current_count_sectors; |
| unsigned int drive = (unsigned long)req->q->disk->private_data; |
| |
| /* current_count_sectors can be zero if transfer failed */ |
| if (error) |
| nr_sectors = blk_rq_cur_sectors(req); |
| if (blk_update_request(req, error, nr_sectors << 9)) |
| return; |
| __blk_mq_end_request(req, error); |
| |
| /* We're done with the request */ |
| floppy_off(drive); |
| current_req = NULL; |
| } |
| |
| /* new request_done. Can handle physical sectors which are smaller than a |
| * logical buffer */ |
| static void request_done(int uptodate) |
| { |
| struct request *req = current_req; |
| int block; |
| char msg[sizeof("request done ") + sizeof(int) * 3]; |
| |
| probing = 0; |
| snprintf(msg, sizeof(msg), "request done %d", uptodate); |
| reschedule_timeout(MAXTIMEOUT, msg); |
| |
| if (!req) { |
| pr_info("floppy.c: no request in request_done\n"); |
| return; |
| } |
| |
| if (uptodate) { |
| /* maintain values for invalidation on geometry |
| * change */ |
| block = current_count_sectors + blk_rq_pos(req); |
| INFBOUND(drive_state[current_drive].maxblock, block); |
| if (block > _floppy->sect) |
| drive_state[current_drive].maxtrack = 1; |
| |
| floppy_end_request(req, 0); |
| } else { |
| if (rq_data_dir(req) == WRITE) { |
| /* record write error information */ |
| write_errors[current_drive].write_errors++; |
| if (write_errors[current_drive].write_errors == 1) { |
| write_errors[current_drive].first_error_sector = blk_rq_pos(req); |
| write_errors[current_drive].first_error_generation = drive_state[current_drive].generation; |
| } |
| write_errors[current_drive].last_error_sector = blk_rq_pos(req); |
| write_errors[current_drive].last_error_generation = drive_state[current_drive].generation; |
| } |
| floppy_end_request(req, BLK_STS_IOERR); |
| } |
| } |
| |
| /* Interrupt handler evaluating the result of the r/w operation */ |
| static void rw_interrupt(void) |
| { |
| int eoc; |
| int ssize; |
| int heads; |
| int nr_sectors; |
| |
| if (reply_buffer[R_HEAD] >= 2) { |
| /* some Toshiba floppy controllers occasionnally seem to |
| * return bogus interrupts after read/write operations, which |
| * can be recognized by a bad head number (>= 2) */ |
| return; |
| } |
| |
| if (!drive_state[current_drive].first_read_date) |
| drive_state[current_drive].first_read_date = jiffies; |
| |
| ssize = DIV_ROUND_UP(1 << raw_cmd->cmd[SIZECODE], 4); |
| |
| if (reply_buffer[ST1] & ST1_EOC) |
| eoc = 1; |
| else |
| eoc = 0; |
| |
| if (raw_cmd->cmd[COMMAND] & 0x80) |
| heads = 2; |
| else |
| heads = 1; |
| |
| nr_sectors = (((reply_buffer[R_TRACK] - raw_cmd->cmd[TRACK]) * heads + |
| reply_buffer[R_HEAD] - raw_cmd->cmd[HEAD]) * raw_cmd->cmd[SECT_PER_TRACK] + |
| reply_buffer[R_SECTOR] - raw_cmd->cmd[SECTOR] + eoc) << raw_cmd->cmd[SIZECODE] >> 2; |
| |
| if (nr_sectors / ssize > |
| DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) { |
| DPRINT("long rw: %x instead of %lx\n", |
| nr_sectors, current_count_sectors); |
| pr_info("rs=%d s=%d\n", reply_buffer[R_SECTOR], |
| raw_cmd->cmd[SECTOR]); |
| pr_info("rh=%d h=%d\n", reply_buffer[R_HEAD], |
| raw_cmd->cmd[HEAD]); |
| pr_info("rt=%d t=%d\n", reply_buffer[R_TRACK], |
| raw_cmd->cmd[TRACK]); |
| pr_info("heads=%d eoc=%d\n", heads, eoc); |
| pr_info("spt=%d st=%d ss=%d\n", |
| raw_cmd->cmd[SECT_PER_TRACK], fsector_t, ssize); |
| pr_info("in_sector_offset=%d\n", in_sector_offset); |
| } |
| |
| nr_sectors -= in_sector_offset; |
| INFBOUND(nr_sectors, 0); |
| SUPBOUND(current_count_sectors, nr_sectors); |
| |
| switch (interpret_errors()) { |
| case 2: |
| cont->redo(); |
| return; |
| case 1: |
| if (!current_count_sectors) { |
| cont->error(); |
| cont->redo(); |
| return; |
| } |
| break; |
| case 0: |
| if (!current_count_sectors) { |
| cont->redo(); |
| return; |
| } |
| current_type[current_drive] = _floppy; |
| floppy_sizes[TOMINOR(current_drive)] = _floppy->size; |
| break; |
| } |
| |
| if (probing) { |
| if (drive_params[current_drive].flags & FTD_MSG) |
| DPRINT("Auto-detected floppy type %s in fd%d\n", |
| _floppy->name, current_drive); |
| current_type[current_drive] = _floppy; |
| floppy_sizes[TOMINOR(current_drive)] = _floppy->size; |
| probing = 0; |
| } |
| |
| if (CT(raw_cmd->cmd[COMMAND]) != FD_READ) { |
| /* transfer directly from buffer */ |
| cont->done(1); |
| } else { |
| buffer_track = raw_cmd->track; |
| buffer_drive = current_drive; |
| INFBOUND(buffer_max, nr_sectors + fsector_t); |
| } |
| cont->redo(); |
| } |
| |
| /* Compute the maximal transfer size */ |
| static int transfer_size(int ssize, int max_sector, int max_size) |
| { |
| SUPBOUND(max_sector, fsector_t + max_size); |
| |
| /* alignment */ |
| max_sector -= (max_sector % _floppy->sect) % ssize; |
| |
| /* transfer size, beginning not aligned */ |
| current_count_sectors = max_sector - fsector_t; |
| |
| return max_sector; |
| } |
| |
| /* |
| * Move data from/to the track buffer to/from the buffer cache. |
| */ |
| static void copy_buffer(int ssize, int max_sector, int max_sector_2) |
| { |
| int remaining; /* number of transferred 512-byte sectors */ |
| struct bio_vec bv; |
| char *dma_buffer; |
| int size; |
| struct req_iterator iter; |
| |
| max_sector = transfer_size(ssize, |
| min(max_sector, max_sector_2), |
| blk_rq_sectors(current_req)); |
| |
| if (current_count_sectors <= 0 && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE && |
| buffer_max > fsector_t + blk_rq_sectors(current_req)) |
| current_count_sectors = min_t(int, buffer_max - fsector_t, |
| blk_rq_sectors(current_req)); |
| |
| remaining = current_count_sectors << 9; |
| if (remaining > blk_rq_bytes(current_req) && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) { |
| DPRINT("in copy buffer\n"); |
| pr_info("current_count_sectors=%ld\n", current_count_sectors); |
| pr_info("remaining=%d\n", remaining >> 9); |
| pr_info("current_req->nr_sectors=%u\n", |
| blk_rq_sectors(current_req)); |
| pr_info("current_req->current_nr_sectors=%u\n", |
| blk_rq_cur_sectors(current_req)); |
| pr_info("max_sector=%d\n", max_sector); |
| pr_info("ssize=%d\n", ssize); |
| } |
| |
| buffer_max = max(max_sector, buffer_max); |
| |
| dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9); |
| |
| size = blk_rq_cur_bytes(current_req); |
| |
| rq_for_each_segment(bv, current_req, iter) { |
| if (!remaining) |
| break; |
| |
| size = bv.bv_len; |
| SUPBOUND(size, remaining); |
| if (dma_buffer + size > |
| floppy_track_buffer + (max_buffer_sectors << 10) || |
| dma_buffer < floppy_track_buffer) { |
| DPRINT("buffer overrun in copy buffer %d\n", |
| (int)((floppy_track_buffer - dma_buffer) >> 9)); |
| pr_info("fsector_t=%d buffer_min=%d\n", |
| fsector_t, buffer_min); |
| pr_info("current_count_sectors=%ld\n", |
| current_count_sectors); |
| if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) |
| pr_info("read\n"); |
| if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) |
| pr_info("write\n"); |
| break; |
| } |
| |
| if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) |
| memcpy_to_bvec(&bv, dma_buffer); |
| else |
| memcpy_from_bvec(dma_buffer, &bv); |
| |
| remaining -= size; |
| dma_buffer += size; |
| } |
| if (remaining) { |
| if (remaining > 0) |
| max_sector -= remaining >> 9; |
| DPRINT("weirdness: remaining %d\n", remaining >> 9); |
| } |
| } |
| |
| /* work around a bug in pseudo DMA |
| * (on some FDCs) pseudo DMA does not stop when the CPU stops |
| * sending data. Hence we need a different way to signal the |
| * transfer length: We use raw_cmd->cmd[SECT_PER_TRACK]. Unfortunately, this |
| * does not work with MT, hence we can only transfer one head at |
| * a time |
| */ |
| static void virtualdmabug_workaround(void) |
| { |
| int hard_sectors; |
| int end_sector; |
| |
| if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) { |
| raw_cmd->cmd[COMMAND] &= ~0x80; /* switch off multiple track mode */ |
| |
| hard_sectors = raw_cmd->length >> (7 + raw_cmd->cmd[SIZECODE]); |
| end_sector = raw_cmd->cmd[SECTOR] + hard_sectors - 1; |
| if (end_sector > raw_cmd->cmd[SECT_PER_TRACK]) { |
| pr_info("too many sectors %d > %d\n", |
| end_sector, raw_cmd->cmd[SECT_PER_TRACK]); |
| return; |
| } |
| raw_cmd->cmd[SECT_PER_TRACK] = end_sector; |
| /* make sure raw_cmd->cmd[SECT_PER_TRACK] |
| * points to end of transfer */ |
| } |
| } |
| |
| /* |
| * Formulate a read/write request. |
| * this routine decides where to load the data (directly to buffer, or to |
| * tmp floppy area), how much data to load (the size of the buffer, the whole |
| * track, or a single sector) |
| * All floppy_track_buffer handling goes in here. If we ever add track buffer |
| * allocation on the fly, it should be done here. No other part should need |
| * modification. |
| */ |
| |
| static int make_raw_rw_request(void) |
| { |
| int aligned_sector_t; |
| int max_sector; |
| int max_size; |
| int tracksize; |
| int ssize; |
| |
| if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n")) |
| return 0; |
| |
| set_fdc((long)current_req->q->disk->private_data); |
| |
| raw_cmd = &default_raw_cmd; |
| raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK; |
| raw_cmd->cmd_count = NR_RW; |
| if (rq_data_dir(current_req) == READ) { |
| raw_cmd->flags |= FD_RAW_READ; |
| raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_READ); |
| } else if (rq_data_dir(current_req) == WRITE) { |
| raw_cmd->flags |= FD_RAW_WRITE; |
| raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_WRITE); |
| } else { |
| DPRINT("%s: unknown command\n", __func__); |
| return 0; |
| } |
| |
| max_sector = _floppy->sect * _floppy->head; |
| |
| raw_cmd->cmd[TRACK] = (int)blk_rq_pos(current_req) / max_sector; |
| fsector_t = (int)blk_rq_pos(current_req) % max_sector; |
| if (_floppy->track && raw_cmd->cmd[TRACK] >= _floppy->track) { |
| if (blk_rq_cur_sectors(current_req) & 1) { |
| current_count_sectors = 1; |
| return 1; |
| } else |
| return 0; |
| } |
| raw_cmd->cmd[HEAD] = fsector_t / _floppy->sect; |
| |
| if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) || |
| test_bit(FD_NEED_TWADDLE_BIT, &drive_state[current_drive].flags)) && |
| fsector_t < _floppy->sect) |
| max_sector = _floppy->sect; |
| |
| /* 2M disks have phantom sectors on the first track */ |
| if ((_floppy->rate & FD_2M) && (!raw_cmd->cmd[TRACK]) && (!raw_cmd->cmd[HEAD])) { |
| max_sector = 2 * _floppy->sect / 3; |
| if (fsector_t >= max_sector) { |
| current_count_sectors = |
| min_t(int, _floppy->sect - fsector_t, |
| blk_rq_sectors(current_req)); |
| return 1; |
| } |
| raw_cmd->cmd[SIZECODE] = 2; |
| } else |
| raw_cmd->cmd[SIZECODE] = FD_SIZECODE(_floppy); |
| raw_cmd->rate = _floppy->rate & 0x43; |
| if ((_floppy->rate & FD_2M) && |
| (raw_cmd->cmd[TRACK] || raw_cmd->cmd[HEAD]) && raw_cmd->rate == 2) |
| raw_cmd->rate = 1; |
| |
| if (raw_cmd->cmd[SIZECODE]) |
| raw_cmd->cmd[SIZECODE2] = 0xff; |
| else |
| raw_cmd->cmd[SIZECODE2] = 0x80; |
| raw_cmd->track = raw_cmd->cmd[TRACK] << STRETCH(_floppy); |
| raw_cmd->cmd[DR_SELECT] = UNIT(current_drive) + PH_HEAD(_floppy, raw_cmd->cmd[HEAD]); |
| raw_cmd->cmd[GAP] = _floppy->gap; |
| ssize = DIV_ROUND_UP(1 << raw_cmd->cmd[SIZECODE], 4); |
| raw_cmd->cmd[SECT_PER_TRACK] = _floppy->sect << 2 >> raw_cmd->cmd[SIZECODE]; |
| raw_cmd->cmd[SECTOR] = ((fsector_t % _floppy->sect) << 2 >> raw_cmd->cmd[SIZECODE]) + |
| FD_SECTBASE(_floppy); |
| |
| /* tracksize describes the size which can be filled up with sectors |
| * of size ssize. |
| */ |
| tracksize = _floppy->sect - _floppy->sect % ssize; |
| if (tracksize < _floppy->sect) { |
| raw_cmd->cmd[SECT_PER_TRACK]++; |
| if (tracksize <= fsector_t % _floppy->sect) |
| raw_cmd->cmd[SECTOR]--; |
| |
| /* if we are beyond tracksize, fill up using smaller sectors */ |
| while (tracksize <= fsector_t % _floppy->sect) { |
| while (tracksize + ssize > _floppy->sect) { |
| raw_cmd->cmd[SIZECODE]--; |
| ssize >>= 1; |
| } |
| raw_cmd->cmd[SECTOR]++; |
| raw_cmd->cmd[SECT_PER_TRACK]++; |
| tracksize += ssize; |
| } |
| max_sector = raw_cmd->cmd[HEAD] * _floppy->sect + tracksize; |
| } else if (!raw_cmd->cmd[TRACK] && !raw_cmd->cmd[HEAD] && !(_floppy->rate & FD_2M) && probing) { |
| max_sector = _floppy->sect; |
| } else if (!raw_cmd->cmd[HEAD] && CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) { |
| /* for virtual DMA bug workaround */ |
| max_sector = _floppy->sect; |
| } |
| |
| in_sector_offset = (fsector_t % _floppy->sect) % ssize; |
| aligned_sector_t = fsector_t - in_sector_offset; |
| max_size = blk_rq_sectors(current_req); |
| if ((raw_cmd->track == buffer_track) && |
| (current_drive == buffer_drive) && |
| (fsector_t >= buffer_min) && (fsector_t < buffer_max)) { |
| /* data already in track buffer */ |
| if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) { |
| copy_buffer(1, max_sector, buffer_max); |
| return 1; |
| } |
| } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) { |
| if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) { |
| unsigned int sectors; |
| |
| sectors = fsector_t + blk_rq_sectors(current_req); |
| if (sectors > ssize && sectors < ssize + ssize) |
| max_size = ssize + ssize; |
| else |
| max_size = ssize; |
| } |
| raw_cmd->flags &= ~FD_RAW_WRITE; |
| raw_cmd->flags |= FD_RAW_READ; |
| raw_cmd->cmd[COMMAND] = FM_MODE(_floppy, FD_READ); |
| } |
| |
| if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) |
| max_size = max_sector; /* unbounded */ |
| |
| /* claim buffer track if needed */ |
| if (buffer_track != raw_cmd->track || /* bad track */ |
| buffer_drive != current_drive || /* bad drive */ |
| fsector_t > buffer_max || |
| fsector_t < buffer_min || |
| ((CT(raw_cmd->cmd[COMMAND]) == FD_READ || |
| (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) && |
| max_sector > 2 * max_buffer_sectors + buffer_min && |
| max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) { |
| /* not enough space */ |
| buffer_track = -1; |
| buffer_drive = current_drive; |
| buffer_max = buffer_min = aligned_sector_t; |
| } |
| raw_cmd->kernel_data = floppy_track_buffer + |
| ((aligned_sector_t - buffer_min) << 9); |
| |
| if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) { |
| /* copy write buffer to track buffer. |
| * if we get here, we know that the write |
| * is either aligned or the data already in the buffer |
| * (buffer will be overwritten) */ |
| if (in_sector_offset && buffer_track == -1) |
| DPRINT("internal error offset !=0 on write\n"); |
| buffer_track = raw_cmd->track; |
| buffer_drive = current_drive; |
| copy_buffer(ssize, max_sector, |
| 2 * max_buffer_sectors + buffer_min); |
| } else |
| transfer_size(ssize, max_sector, |
| 2 * max_buffer_sectors + buffer_min - |
| aligned_sector_t); |
| |
| /* round up current_count_sectors to get dma xfer size */ |
| raw_cmd->length = in_sector_offset + current_count_sectors; |
| raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1; |
| raw_cmd->length <<= 9; |
| if ((raw_cmd->length < current_count_sectors << 9) || |
| (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE && |
| (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || |
| aligned_sector_t < buffer_min)) || |
| raw_cmd->length % (128 << raw_cmd->cmd[SIZECODE]) || |
| raw_cmd->length <= 0 || current_count_sectors <= 0) { |
| DPRINT("fractionary current count b=%lx s=%lx\n", |
| raw_cmd->length, current_count_sectors); |
| pr_info("addr=%d, length=%ld\n", |
| (int)((raw_cmd->kernel_data - |
| floppy_track_buffer) >> 9), |
| current_count_sectors); |
| pr_info("st=%d ast=%d mse=%d msi=%d\n", |
| fsector_t, aligned_sector_t, max_sector, max_size); |
| pr_info("ssize=%x SIZECODE=%d\n", ssize, raw_cmd->cmd[SIZECODE]); |
| pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", |
| raw_cmd->cmd[COMMAND], raw_cmd->cmd[SECTOR], |
| raw_cmd->cmd[HEAD], raw_cmd->cmd[TRACK]); |
| pr_info("buffer drive=%d\n", buffer_drive); |
| pr_info("buffer track=%d\n", buffer_track); |
| pr_info("buffer_min=%d\n", buffer_min); |
| pr_info("buffer_max=%d\n", buffer_max); |
| return 0; |
| } |
| |
| if (raw_cmd->kernel_data < floppy_track_buffer || |
| current_count_sectors < 0 || |
| raw_cmd->length < 0 || |
| raw_cmd->kernel_data + raw_cmd->length > |
| floppy_track_buffer + (max_buffer_sectors << 10)) { |
| DPRINT("buffer overrun in schedule dma\n"); |
| pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n", |
| fsector_t, buffer_min, raw_cmd->length >> 9); |
| pr_info("current_count_sectors=%ld\n", |
| current_count_sectors); |
| if (CT(raw_cmd->cmd[COMMAND]) == FD_READ) |
| pr_info("read\n"); |
| if (CT(raw_cmd->cmd[COMMAND]) == FD_WRITE) |
| pr_info("write\n"); |
| return 0; |
| } |
| if (raw_cmd->length == 0) { |
| DPRINT("zero dma transfer attempted from make_raw_request\n"); |
| return 0; |
| } |
| |
| virtualdmabug_workaround(); |
| return 2; |
| } |
| |
| static int set_next_request(void) |
| { |
| current_req = list_first_entry_or_null(&floppy_reqs, struct request, |
| queuelist); |
| if (current_req) { |
| floppy_errors = 0; |
| list_del_init(¤t_req->queuelist); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* Starts or continues processing request. Will automatically unlock the |
| * driver at end of request. |
| */ |
| static void redo_fd_request(void) |
| { |
| int drive; |
| int tmp; |
| |
| lastredo = jiffies; |
| if (current_drive < N_DRIVE) |
| floppy_off(current_drive); |
| |
| do_request: |
| if (!current_req) { |
| int pending; |
| |
| spin_lock_irq(&floppy_lock); |
| pending = set_next_request(); |
| spin_unlock_irq(&floppy_lock); |
| if (!pending) { |
| do_floppy = NULL; |
| unlock_fdc(); |
| return; |
| } |
| } |
| drive = (long)current_req->q->disk->private_data; |
| set_fdc(drive); |
| reschedule_timeout(current_drive, "redo fd request"); |
| |
| set_floppy(drive); |
| raw_cmd = &default_raw_cmd; |
| raw_cmd->flags = 0; |
| if (start_motor(redo_fd_request)) |
| return; |
| |
| disk_change(current_drive); |
| if (test_bit(current_drive, &fake_change) || |
| test_bit(FD_DISK_CHANGED_BIT, &drive_state[current_drive].flags)) { |
| DPRINT("disk absent or changed during operation\n"); |
| request_done(0); |
| goto do_request; |
| } |
| if (!_floppy) { /* Autodetection */ |
| if (!probing) { |
| drive_state[current_drive].probed_format = 0; |
| if (next_valid_format(current_drive)) { |
| DPRINT("no autodetectable formats\n"); |
| _floppy = NULL; |
| request_done(0); |
| goto do_request; |
| } |
| } |
| probing = 1; |
| _floppy = floppy_type + drive_params[current_drive].autodetect[drive_state[current_drive].probed_format]; |
| } else |
| probing = 0; |
| tmp = make_raw_rw_request(); |
| if (tmp < 2) { |
| request_done(tmp); |
| goto do_request; |
| } |
| |
| if (test_bit(FD_NEED_TWADDLE_BIT, &drive_state[current_drive].flags)) |
| twaddle(current_fdc, current_drive); |
| schedule_bh(floppy_start); |
| debugt(__func__, "queue fd request"); |
| return; |
| } |
| |
| static const struct cont_t rw_cont = { |
| .interrupt = rw_interrupt, |
| .redo = redo_fd_request, |
| .error = bad_flp_intr, |
| .done = request_done |
| }; |
| |
| /* schedule the request and automatically unlock the driver on completion */ |
| static void process_fd_request(void) |
| { |
| cont = &rw_cont; |
| schedule_bh(redo_fd_request); |
| } |
| |
| static blk_status_t floppy_queue_rq(struct blk_mq_hw_ctx *hctx, |
| const struct blk_mq_queue_data *bd) |
| { |
| blk_mq_start_request(bd->rq); |
| |
| if (WARN(max_buffer_sectors == 0, |
| "VFS: %s called on non-open device\n", __func__)) |
| return BLK_STS_IOERR; |
| |
| if (WARN(atomic_read(&usage_count) == 0, |
| "warning: usage count=0, current_req=%p sect=%ld flags=%llx\n", |
| current_req, (long)blk_rq_pos(current_req), |
| (__force unsigned long long) current_req->cmd_flags)) |
| return BLK_STS_IOERR; |
| |
| if (test_and_set_bit(0, &fdc_busy)) { |
| /* fdc busy, this new request will be treated when the |
| current one is done */ |
| is_alive(__func__, "old request running"); |
| return BLK_STS_RESOURCE; |
| } |
| |
| spin_lock_irq(&floppy_lock); |
| list_add_tail(&bd->rq->queuelist, &floppy_reqs); |
| spin_unlock_irq(&floppy_lock); |
| |
| command_status = FD_COMMAND_NONE; |
| __reschedule_timeout(MAXTIMEOUT, "fd_request"); |
| set_fdc(0); |
| process_fd_request(); |
| is_alive(__func__, ""); |
| return BLK_STS_OK; |
| } |
| |
| static const struct cont_t poll_cont = { |
| .interrupt = success_and_wakeup, |
| .redo = floppy_ready, |
| .error = generic_failure, |
| .done = generic_done |
| }; |
| |
| static int poll_drive(bool interruptible, int flag) |
| { |
| /* no auto-sense, just clear dcl */ |
| raw_cmd = &default_raw_cmd; |
| raw_cmd->flags = flag; |
| raw_cmd->track = 0; |
| raw_cmd->cmd_count = 0; |
| cont = &poll_cont; |
| debug_dcl(drive_params[current_drive].flags, |
| "setting NEWCHANGE in poll_drive\n"); |
| set_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[current_drive].flags); |
| |
| return wait_til_done(floppy_ready, interruptible); |
| } |
| |
| /* |
| * User triggered reset |
| * ==================== |
| */ |
| |
| static void reset_intr(void) |
| { |
| pr_info("weird, reset interrupt called\n"); |
| } |
| |
| static const struct cont_t reset_cont = { |
| .interrupt = reset_intr, |
| .redo = success_and_wakeup, |
| .error = generic_failure, |
| .done = generic_done |
| }; |
| |
| /* |
| * Resets the FDC connected to drive <drive>. |
| * Both current_drive and current_fdc are changed to match the new drive. |
| */ |
| static int user_reset_fdc(int drive, int arg, bool interruptible) |
| { |
| int ret; |
| |
| if (lock_fdc(drive)) |
| return -EINTR; |
| |
| if (arg == FD_RESET_ALWAYS) |
| fdc_state[current_fdc].reset = 1; |
| if (fdc_state[current_fdc].reset) { |
| /* note: reset_fdc will take care of unlocking the driver |
| * on completion. |
| */ |
| cont = &reset_cont; |
| ret = wait_til_done(reset_fdc, interruptible); |
| if (ret == -EINTR) |
| return -EINTR; |
| } |
| process_fd_request(); |
| return 0; |
| } |
| |
| /* |
| * Misc Ioctl's and support |
| * ======================== |
| */ |
| static inline int fd_copyout(void __user *param, const void *address, |
| unsigned long size) |
| { |
| return copy_to_user(param, address, size) ? -EFAULT : 0; |
| } |
| |
| static inline int fd_copyin(void __user *param, void *address, |
| unsigned long size) |
| { |
| return copy_from_user(address, param, size) ? -EFAULT : 0; |
| } |
| |
| static const char *drive_name(int type, int drive) |
| { |
| struct floppy_struct *floppy; |
| |
| if (type) |
| floppy = floppy_type + type; |
| else { |
| if (drive_params[drive].native_format) |
| floppy = floppy_type + drive_params[drive].native_format; |
| else |
| return "(null)"; |
| } |
| if (floppy->name) |
| return floppy->name; |
| else |
| return "(null)"; |
| } |
| |
| #ifdef CONFIG_BLK_DEV_FD_RAWCMD |
| |
| /* raw commands */ |
| static void raw_cmd_done(int flag) |
| { |
| if (!flag) { |
| raw_cmd->flags |= FD_RAW_FAILURE; |
| raw_cmd->flags |= FD_RAW_HARDFAILURE; |
| } else { |
| raw_cmd->reply_count = inr; |
| if (raw_cmd->reply_count > FD_RAW_REPLY_SIZE) |
| raw_cmd->reply_count = 0; |
| memcpy(raw_cmd->reply, reply_buffer, raw_cmd->reply_count); |
| |
| if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) { |
| unsigned long flags; |
| flags = claim_dma_lock(); |
| raw_cmd->length = fd_get_dma_residue(); |
| release_dma_lock(flags); |
| } |
| |
| if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && |
| (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) |
| raw_cmd->flags |= FD_RAW_FAILURE; |
| |
| if (disk_change(current_drive)) |
| raw_cmd->flags |= FD_RAW_DISK_CHANGE; |
| else |
| raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; |
| if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) |
| motor_off_callback(&motor_off_timer[current_drive]); |
| |
| if (raw_cmd->next && |
| (!(raw_cmd->flags & FD_RAW_FAILURE) || |
| !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && |
| ((raw_cmd->flags & FD_RAW_FAILURE) || |
| !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) { |
| raw_cmd = raw_cmd->next; |
| return; |
| } |
| } |
| generic_done(flag); |
| } |
| |
| static const struct cont_t raw_cmd_cont = { |
| .interrupt = success_and_wakeup, |
| .redo = floppy_start, |
| .error = generic_failure, |
| .done = raw_cmd_done |
| }; |
| |
| static int raw_cmd_copyout(int cmd, void __user *param, |
| struct floppy_raw_cmd *ptr) |
| { |
| int ret; |
| |
| while (ptr) { |
| struct floppy_raw_cmd cmd = *ptr; |
| cmd.next = NULL; |
| cmd.kernel_data = NULL; |
| ret = copy_to_user(param, &cmd, sizeof(cmd)); |
| if (ret) |
| return -EFAULT; |
| param += sizeof(struct floppy_raw_cmd); |
| if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) { |
| if (ptr->length >= 0 && |
| ptr->length <= ptr->buffer_length) { |
| long length = ptr->buffer_length - ptr->length; |
| ret = fd_copyout(ptr->data, ptr->kernel_data, |
| length); |
| if (ret) |
| return ret; |
| } |
| } |
| ptr = ptr->next; |
| } |
| |
| return 0; |
| } |
| |
| static void raw_cmd_free(struct floppy_raw_cmd **ptr) |
| { |
| struct floppy_raw_cmd *next; |
| struct floppy_raw_cmd *this; |
| |
| this = *ptr; |
| *ptr = NULL; |
| while (this) { |
| if (this->buffer_length) { |
| fd_dma_mem_free((unsigned long)this->kernel_data, |
| this->buffer_length); |
| this->buffer_length = 0; |
| } |
| next = this->next; |
| kfree(this); |
| this = next; |
| } |
| } |
| |
| #define MAX_LEN (1UL << MAX_ORDER << PAGE_SHIFT) |
| |
| static int raw_cmd_copyin(int cmd, void __user *param, |
| struct floppy_raw_cmd **rcmd) |
| { |
| struct floppy_raw_cmd *ptr; |
| int ret; |
| |
| *rcmd = NULL; |
| |
| loop: |
| ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_KERNEL); |
| if (!ptr) |
| return -ENOMEM; |
| *rcmd = ptr; |
| ret = copy_from_user(ptr, param, sizeof(*ptr)); |
| ptr->next = NULL; |
| ptr->buffer_length = 0; |
| ptr->kernel_data = NULL; |
| if (ret) |
| return -EFAULT; |
| param += sizeof(struct floppy_raw_cmd); |
| if (ptr->cmd_count > FD_RAW_CMD_FULLSIZE) |
| return -EINVAL; |
| |
| memset(ptr->reply, 0, FD_RAW_REPLY_SIZE); |
| ptr->resultcode = 0; |
| |
| if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { |
| if (ptr->length <= 0 || ptr->length > MAX_LEN) |
| return -EINVAL; |
| ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length); |
| fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length); |
| if (!ptr->kernel_data) |
| return -ENOMEM; |
| ptr->buffer_length = ptr->length; |
| } |
| if (ptr->flags & FD_RAW_WRITE) { |
| ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length); |
| if (ret) |
| return ret; |
| } |
| |
| if (ptr->flags & FD_RAW_MORE) { |
| rcmd = &(ptr->next); |
| ptr->rate &= 0x43; |
| goto loop; |
| } |
| |
| return 0; |
| } |
| |
| static int raw_cmd_ioctl(int cmd, void __user *param) |
| { |
| struct floppy_raw_cmd *my_raw_cmd; |
| int drive; |
| int ret2; |
| int ret; |
| |
| if (fdc_state[current_fdc].rawcmd <= 1) |
| fdc_state[current_fdc].rawcmd = 1; |
| for (drive = 0; drive < N_DRIVE; drive++) { |
| if (FDC(drive) != current_fdc) |
| continue; |
| if (drive == current_drive) { |
| if (drive_state[drive].fd_ref > 1) { |
| fdc_state[current_fdc].rawcmd = 2; |
| break; |
| } |
| } else if (drive_state[drive].fd_ref) { |
| fdc_state[current_fdc].rawcmd = 2; |
| break; |
| } |
| } |
| |
| if (fdc_state[current_fdc].reset) |
| return -EIO; |
| |
| ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); |
| if (ret) { |
| raw_cmd_free(&my_raw_cmd); |
| return ret; |
| } |
| |
| raw_cmd = my_raw_cmd; |
| cont = &raw_cmd_cont; |
| ret = wait_til_done(floppy_start, true); |
| debug_dcl(drive_params[current_drive].flags, |
| "calling disk change from raw_cmd ioctl\n"); |
| |
| if (ret != -EINTR && fdc_state[current_fdc].reset) |
| ret = -EIO; |
| |
| drive_state[current_drive].track = NO_TRACK; |
| |
| ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); |
| if (!ret) |
| ret = ret2; |
| raw_cmd_free(&my_raw_cmd); |
| return ret; |
| } |
| |
| static int floppy_raw_cmd_ioctl(int type, int drive, int cmd, |
| void __user *param) |
| { |
| int ret; |
| |
| pr_warn_once("Note: FDRAWCMD is deprecated and will be removed from the kernel in the near future.\n"); |
| |
| if (type) |
| return -EINVAL; |
| if (lock_fdc(drive)) |
| return -EINTR; |
| set_floppy(drive); |
| ret = raw_cmd_ioctl(cmd, param); |
| if (ret == -EINTR) |
| return -EINTR; |
| process_fd_request(); |
| return ret; |
| } |
| |
| #else /* CONFIG_BLK_DEV_FD_RAWCMD */ |
| |
| static int floppy_raw_cmd_ioctl(int type, int drive, int cmd, |
| void __user *param) |
| { |
| return -EOPNOTSUPP; |
| } |
| |
| #endif |
| |
| static int invalidate_drive(struct gendisk *disk) |
| { |
| /* invalidate the buffer track to force a reread */ |
| set_bit((long)disk->private_data, &fake_change); |
| process_fd_request(); |
| if (disk_check_media_change(disk)) |
| floppy_revalidate(disk); |
| return 0; |
| } |
| |
| static int set_geometry(unsigned int cmd, struct floppy_struct *g, |
| int drive, int type, struct block_device *bdev) |
| { |
| int cnt; |
| |
| /* sanity checking for parameters. */ |
| if ((int)g->sect <= 0 || |
| (int)g->head <= 0 || |
| /* check for overflow in max_sector */ |
| (int)(g->sect * g->head) <= 0 || |
| /* check for zero in raw_cmd->cmd[F_SECT_PER_TRACK] */ |
| (unsigned char)((g->sect << 2) >> FD_SIZECODE(g)) == 0 || |
| g->track <= 0 || g->track > drive_params[drive].tracks >> STRETCH(g) || |
| /* check if reserved bits are set */ |
| (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0) |
| return -EINVAL; |
| if (type) { |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| mutex_lock(&open_lock); |
| if (lock_fdc(drive)) { |
| mutex_unlock(&open_lock); |
| return -EINTR; |
| } |
| floppy_type[type] = *g; |
| floppy_type[type].name = "user format"; |
| for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) |
| floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] = |
| floppy_type[type].size + 1; |
| process_fd_request(); |
| for (cnt = 0; cnt < N_DRIVE; cnt++) { |
| struct gendisk *disk = opened_disk[cnt]; |
| |
| if (!disk || ITYPE(drive_state[cnt].fd_device) != type) |
| continue; |
| disk_force_media_change(disk); |
| } |
| mutex_unlock(&open_lock); |
| } else { |
| int oldStretch; |
| |
| if (lock_fdc(drive)) |
| return -EINTR; |
| if (cmd != FDDEFPRM) { |
| /* notice a disk change immediately, else |
| * we lose our settings immediately*/ |
| if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
| return -EINTR; |
| } |
| oldStretch = g->stretch; |
| user_params[drive] = *g; |
| if (buffer_drive == drive) |
| SUPBOUND(buffer_max, user_params[drive].sect); |
| current_type[drive] = &user_params[drive]; |
| floppy_sizes[drive] = user_params[drive].size; |
| if (cmd == FDDEFPRM) |
| drive_state[current_drive].keep_data = -1; |
| else |
| drive_state[current_drive].keep_data = 1; |
| /* invalidation. Invalidate only when needed, i.e. |
| * when there are already sectors in the buffer cache |
| * whose number will change. This is useful, because |
| * mtools often changes the geometry of the disk after |
| * looking at the boot block */ |
| if (drive_state[current_drive].maxblock > user_params[drive].sect || |
| drive_state[current_drive].maxtrack || |
| ((user_params[drive].sect ^ oldStretch) & |
| (FD_SWAPSIDES | FD_SECTBASEMASK))) |
| invalidate_drive(bdev->bd_disk); |
| else |
| process_fd_request(); |
| } |
| return 0; |
| } |
| |
| /* handle obsolete ioctl's */ |
| static unsigned int ioctl_table[] = { |
| FDCLRPRM, |
| FDSETPRM, |
| FDDEFPRM, |
| FDGETPRM, |
| FDMSGON, |
| FDMSGOFF, |
| FDFMTBEG, |
| FDFMTTRK, |
| FDFMTEND, |
| FDSETEMSGTRESH, |
| FDFLUSH, |
| FDSETMAXERRS, |
| FDGETMAXERRS, |
| FDGETDRVTYP, |
| FDSETDRVPRM, |
| FDGETDRVPRM, |
| FDGETDRVSTAT, |
| FDPOLLDRVSTAT, |
| FDRESET, |
| FDGETFDCSTAT, |
| FDWERRORCLR, |
| FDWERRORGET, |
| FDRAWCMD, |
| FDEJECT, |
| FDTWADDLE |
| }; |
| |
| static int normalize_ioctl(unsigned int *cmd, int *size) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) { |
| if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) { |
| *size = _IOC_SIZE(*cmd); |
| *cmd = ioctl_table[i]; |
| if (*size > _IOC_SIZE(*cmd)) { |
| pr_info("ioctl not yet supported\n"); |
| return -EFAULT; |
| } |
| return 0; |
| } |
| } |
| return -EINVAL; |
| } |
| |
| static int get_floppy_geometry(int drive, int type, struct floppy_struct **g) |
| { |
| if (type) |
| *g = &floppy_type[type]; |
| else { |
| if (lock_fdc(drive)) |
| return -EINTR; |
| if (poll_drive(false, 0) == -EINTR) |
| return -EINTR; |
| process_fd_request(); |
| *g = current_type[drive]; |
| } |
| if (!*g) |
| return -ENODEV; |
| return 0; |
| } |
| |
| static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
| { |
| int drive = (long)bdev->bd_disk->private_data; |
| int type = ITYPE(drive_state[drive].fd_device); |
| struct floppy_struct *g; |
| int ret; |
| |
| ret = get_floppy_geometry(drive, type, &g); |
| if (ret) |
| return ret; |
| |
| geo->heads = g->head; |
| geo->sectors = g->sect; |
| geo->cylinders = g->track; |
| return 0; |
| } |
| |
| static bool valid_floppy_drive_params(const short autodetect[FD_AUTODETECT_SIZE], |
| int native_format) |
| { |
| size_t floppy_type_size = ARRAY_SIZE(floppy_type); |
| size_t i = 0; |
| |
| for (i = 0; i < FD_AUTODETECT_SIZE; ++i) { |
| if (autodetect[i] < 0 || |
| autodetect[i] >= floppy_type_size) |
| return false; |
| } |
| |
| if (native_format < 0 || native_format >= floppy_type_size) |
| return false; |
| |
| return true; |
| } |
| |
| static int fd_locked_ioctl(struct block_device *bdev, blk_mode_t mode, |
| unsigned int cmd, unsigned long param) |
| { |
| int drive = (long)bdev->bd_disk->private_data; |
| int type = ITYPE(drive_state[drive].fd_device); |
| int ret; |
| int size; |
| union inparam { |
| struct floppy_struct g; /* geometry */ |
| struct format_descr f; |
| struct floppy_max_errors max_errors; |
| struct floppy_drive_params dp; |
| } inparam; /* parameters coming from user space */ |
| const void *outparam; /* parameters passed back to user space */ |
| |
| /* convert compatibility eject ioctls into floppy eject ioctl. |
| * We do this in order to provide a means to eject floppy disks before |
| * installing the new fdutils package */ |
| if (cmd == CDROMEJECT || /* CD-ROM eject */ |
| cmd == 0x6470) { /* SunOS floppy eject */ |
| DPRINT("obsolete eject ioctl\n"); |
| DPRINT("please use floppycontrol --eject\n"); |
| cmd = FDEJECT; |
| } |
| |
| if (!((cmd & 0xff00) == 0x0200)) |
| return -EINVAL; |
| |
| /* convert the old style command into a new style command */ |
| ret = normalize_ioctl(&cmd, &size); |
| if (ret) |
| return ret; |
| |
| /* permission checks */ |
| if (((cmd & 0x40) && |
| !(mode & (BLK_OPEN_WRITE | BLK_OPEN_WRITE_IOCTL))) || |
| ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))) |
| return -EPERM; |
| |
| if (WARN_ON(size < 0 || size > sizeof(inparam))) |
| return -EINVAL; |
| |
| /* copyin */ |
| memset(&inparam, 0, sizeof(inparam)); |
| if (_IOC_DIR(cmd) & _IOC_WRITE) { |
| ret = fd_copyin((void __user *)param, &inparam, size); |
| if (ret) |
| return ret; |
| } |
| |
| switch (cmd) { |
| case FDEJECT: |
| if (drive_state[drive].fd_ref != 1) |
| /* somebody else has this drive open */ |
| return -EBUSY; |
| if (lock_fdc(drive)) |
| return -EINTR; |
| |
| /* do the actual eject. Fails on |
| * non-Sparc architectures */ |
| ret = fd_eject(UNIT(drive)); |
| |
| set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags); |
| set_bit(FD_VERIFY_BIT, &drive_state[drive].flags); |
| process_fd_request(); |
| return ret; |
| case FDCLRPRM: |
| if (lock_fdc(drive)) |
| return -EINTR; |
| current_type[drive] = NULL; |
| floppy_sizes[drive] = MAX_DISK_SIZE << 1; |
| drive_state[drive].keep_data = 0; |
| return invalidate_drive(bdev->bd_disk); |
| case FDSETPRM: |
| case FDDEFPRM: |
| return set_geometry(cmd, &inparam.g, drive, type, bdev); |
| case FDGETPRM: |
| ret = get_floppy_geometry(drive, type, |
| (struct floppy_struct **)&outparam); |
| if (ret) |
| return ret; |
| memcpy(&inparam.g, outparam, |
| offsetof(struct floppy_struct, name)); |
| outparam = &inparam.g; |
| break; |
| case FDMSGON: |
| drive_params[drive].flags |= FTD_MSG; |
| return 0; |
| case FDMSGOFF: |
| drive_params[drive].flags &= ~FTD_MSG; |
| return 0; |
| case FDFMTBEG: |
| if (lock_fdc(drive)) |
| return -EINTR; |
| if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
| return -EINTR; |
| ret = drive_state[drive].flags; |
| process_fd_request(); |
| if (ret & FD_VERIFY) |
| return -ENODEV; |
| if (!(ret & FD_DISK_WRITABLE)) |
| return -EROFS; |
| return 0; |
| case FDFMTTRK: |
| if (drive_state[drive].fd_ref != 1) |
| return -EBUSY; |
| return do_format(drive, &inparam.f); |
| case FDFMTEND: |
| case FDFLUSH: |
| if (lock_fdc(drive)) |
| return -EINTR; |
| return invalidate_drive(bdev->bd_disk); |
| case FDSETEMSGTRESH: |
| drive_params[drive].max_errors.reporting = (unsigned short)(param & 0x0f); |
| return 0; |
| case FDGETMAXERRS: |
| outparam = &drive_params[drive].max_errors; |
| break; |
| case FDSETMAXERRS: |
| drive_params[drive].max_errors = inparam.max_errors; |
| break; |
| case FDGETDRVTYP: |
| outparam = drive_name(type, drive); |
| SUPBOUND(size, strlen((const char *)outparam) + 1); |
| break; |
| case FDSETDRVPRM: |
| if (!valid_floppy_drive_params(inparam.dp.autodetect, |
| inparam.dp.native_format)) |
| return -EINVAL; |
| drive_params[drive] = inparam.dp; |
| break; |
| case FDGETDRVPRM: |
| outparam = &drive_params[drive]; |
| break; |
| case FDPOLLDRVSTAT: |
| if (lock_fdc(drive)) |
| return -EINTR; |
| if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
| return -EINTR; |
| process_fd_request(); |
| fallthrough; |
| case FDGETDRVSTAT: |
| outparam = &drive_state[drive]; |
| break; |
| case FDRESET: |
| return user_reset_fdc(drive, (int)param, true); |
| case FDGETFDCSTAT: |
| outparam = &fdc_state[FDC(drive)]; |
| break; |
| case FDWERRORCLR: |
| memset(&write_errors[drive], 0, sizeof(write_errors[drive])); |
| return 0; |
| case FDWERRORGET: |
| outparam = &write_errors[drive]; |
| break; |
| case FDRAWCMD: |
| return floppy_raw_cmd_ioctl(type, drive, cmd, (void __user *)param); |
| case FDTWADDLE: |
| if (lock_fdc(drive)) |
| return -EINTR; |
| twaddle(current_fdc, current_drive); |
| process_fd_request(); |
| return 0; |
| default: |
| return -EINVAL; |
| } |
| |
| if (_IOC_DIR(cmd) & _IOC_READ) |
| return fd_copyout((void __user *)param, outparam, size); |
| |
| return 0; |
| } |
| |
| static int fd_ioctl(struct block_device *bdev, blk_mode_t mode, |
| unsigned int cmd, unsigned long param) |
| { |
| int ret; |
| |
| mutex_lock(&floppy_mutex); |
| ret = fd_locked_ioctl(bdev, mode, cmd, param); |
| mutex_unlock(&floppy_mutex); |
| |
| return ret; |
| } |
| |
| #ifdef CONFIG_COMPAT |
| |
| struct compat_floppy_drive_params { |
| char cmos; |
| compat_ulong_t max_dtr; |
| compat_ulong_t hlt; |
| compat_ulong_t hut; |
| compat_ulong_t srt; |
| compat_ulong_t spinup; |
| compat_ulong_t spindown; |
| unsigned char spindown_offset; |
| unsigned char select_delay; |
| unsigned char rps; |
| unsigned char tracks; |
| compat_ulong_t timeout; |
| unsigned char interleave_sect; |
| struct floppy_max_errors max_errors; |
| char flags; |
| char read_track; |
| short autodetect[FD_AUTODETECT_SIZE]; |
| compat_int_t checkfreq; |
| compat_int_t native_format; |
| }; |
| |
| struct compat_floppy_drive_struct { |
| signed char flags; |
| compat_ulong_t spinup_date; |
| compat_ulong_t select_date; |
| compat_ulong_t first_read_date; |
| short probed_format; |
| short track; |
| short maxblock; |
| short maxtrack; |
| compat_int_t generation; |
| compat_int_t keep_data; |
| compat_int_t fd_ref; |
| compat_int_t fd_device; |
| compat_int_t last_checked; |
| compat_caddr_t dmabuf; |
| compat_int_t bufblocks; |
| }; |
| |
| struct compat_floppy_fdc_state { |
| compat_int_t spec1; |
| compat_int_t spec2; |
| compat_int_t dtr; |
| unsigned char version; |
| unsigned char dor; |
| compat_ulong_t address; |
| unsigned int rawcmd:2; |
| unsigned int reset:1; |
| unsigned int need_configure:1; |
| unsigned int perp_mode:2; |
| unsigned int has_fifo:1; |
| unsigned int driver_version; |
| unsigned char track[4]; |
| }; |
| |
| struct compat_floppy_write_errors { |
| unsigned int write_errors; |
| compat_ulong_t first_error_sector; |
| compat_int_t first_error_generation; |
| compat_ulong_t last_error_sector; |
| compat_int_t last_error_generation; |
| compat_uint_t badness; |
| }; |
| |
| #define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct) |
| #define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct) |
| #define FDSETDRVPRM32 _IOW(2, 0x90, struct compat_floppy_drive_params) |
| #define FDGETDRVPRM32 _IOR(2, 0x11, struct compat_floppy_drive_params) |
| #define FDGETDRVSTAT32 _IOR(2, 0x12, struct compat_floppy_drive_struct) |
| #define FDPOLLDRVSTAT32 _IOR(2, 0x13, struct compat_floppy_drive_struct) |
| #define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state) |
| #define FDWERRORGET32 _IOR(2, 0x17, struct compat_floppy_write_errors) |
| |
| static int compat_set_geometry(struct block_device *bdev, blk_mode_t mode, |
| unsigned int cmd, struct compat_floppy_struct __user *arg) |
| { |
| struct floppy_struct v; |
| int drive, type; |
| int err; |
| |
| BUILD_BUG_ON(offsetof(struct floppy_struct, name) != |
| offsetof(struct compat_floppy_struct, name)); |
| |
| if (!(mode & (BLK_OPEN_WRITE | BLK_OPEN_WRITE_IOCTL))) |
| return -EPERM; |
| |
| memset(&v, 0, sizeof(struct floppy_struct)); |
| if (copy_from_user(&v, arg, offsetof(struct floppy_struct, name))) |
| return -EFAULT; |
| |
| mutex_lock(&floppy_mutex); |
| drive = (long)bdev->bd_disk->private_data; |
| type = ITYPE(drive_state[drive].fd_device); |
| err = set_geometry(cmd == FDSETPRM32 ? FDSETPRM : FDDEFPRM, |
| &v, drive, type, bdev); |
| mutex_unlock(&floppy_mutex); |
| return err; |
| } |
| |
| static int compat_get_prm(int drive, |
| struct compat_floppy_struct __user *arg) |
| { |
| struct compat_floppy_struct v; |
| struct floppy_struct *p; |
| int err; |
| |
| memset(&v, 0, sizeof(v)); |
| mutex_lock(&floppy_mutex); |
| err = get_floppy_geometry(drive, ITYPE(drive_state[drive].fd_device), |
| &p); |
| if (err) { |
| mutex_unlock(&floppy_mutex); |
| return err; |
| } |
| memcpy(&v, p, offsetof(struct floppy_struct, name)); |
| mutex_unlock(&floppy_mutex); |
| if (copy_to_user(arg, &v, sizeof(struct compat_floppy_struct))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int compat_setdrvprm(int drive, |
| struct compat_floppy_drive_params __user *arg) |
| { |
| struct compat_floppy_drive_params v; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| if (copy_from_user(&v, arg, sizeof(struct compat_floppy_drive_params))) |
| return -EFAULT; |
| if (!valid_floppy_drive_params(v.autodetect, v.native_format)) |
| return -EINVAL; |
| mutex_lock(&floppy_mutex); |
| drive_params[drive].cmos = v.cmos; |
| drive_params[drive].max_dtr = v.max_dtr; |
| drive_params[drive].hlt = v.hlt; |
| drive_params[drive].hut = v.hut; |
| drive_params[drive].srt = v.srt; |
| drive_params[drive].spinup = v.spinup; |
| drive_params[drive].spindown = v.spindown; |
| drive_params[drive].spindown_offset = v.spindown_offset; |
| drive_params[drive].select_delay = v.select_delay; |
| drive_params[drive].rps = v.rps; |
| drive_params[drive].tracks = v.tracks; |
| drive_params[drive].timeout = v.timeout; |
| drive_params[drive].interleave_sect = v.interleave_sect; |
| drive_params[drive].max_errors = v.max_errors; |
| drive_params[drive].flags = v.flags; |
| drive_params[drive].read_track = v.read_track; |
| memcpy(drive_params[drive].autodetect, v.autodetect, |
| sizeof(v.autodetect)); |
| drive_params[drive].checkfreq = v.checkfreq; |
| drive_params[drive].native_format = v.native_format; |
| mutex_unlock(&floppy_mutex); |
| return 0; |
| } |
| |
| static int compat_getdrvprm(int drive, |
| struct compat_floppy_drive_params __user *arg) |
| { |
| struct compat_floppy_drive_params v; |
| |
| memset(&v, 0, sizeof(struct compat_floppy_drive_params)); |
| mutex_lock(&floppy_mutex); |
| v.cmos = drive_params[drive].cmos; |
| v.max_dtr = drive_params[drive].max_dtr; |
| v.hlt = drive_params[drive].hlt; |
| v.hut = drive_params[drive].hut; |
| v.srt = drive_params[drive].srt; |
| v.spinup = drive_params[drive].spinup; |
| v.spindown = drive_params[drive].spindown; |
| v.spindown_offset = drive_params[drive].spindown_offset; |
| v.select_delay = drive_params[drive].select_delay; |
| v.rps = drive_params[drive].rps; |
| v.tracks = drive_params[drive].tracks; |
| v.timeout = drive_params[drive].timeout; |
| v.interleave_sect = drive_params[drive].interleave_sect; |
| v.max_errors = drive_params[drive].max_errors; |
| v.flags = drive_params[drive].flags; |
| v.read_track = drive_params[drive].read_track; |
| memcpy(v.autodetect, drive_params[drive].autodetect, |
| sizeof(v.autodetect)); |
| v.checkfreq = drive_params[drive].checkfreq; |
| v.native_format = drive_params[drive].native_format; |
| mutex_unlock(&floppy_mutex); |
| |
| if (copy_to_user(arg, &v, sizeof(struct compat_floppy_drive_params))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int compat_getdrvstat(int drive, bool poll, |
| struct compat_floppy_drive_struct __user *arg) |
| { |
| struct compat_floppy_drive_struct v; |
| |
| memset(&v, 0, sizeof(struct compat_floppy_drive_struct)); |
| mutex_lock(&floppy_mutex); |
| |
| if (poll) { |
| if (lock_fdc(drive)) |
| goto Eintr; |
| if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
| goto Eintr; |
| process_fd_request(); |
| } |
| v.spinup_date = drive_state[drive].spinup_date; |
| v.select_date = drive_state[drive].select_date; |
| v.first_read_date = drive_state[drive].first_read_date; |
| v.probed_format = drive_state[drive].probed_format; |
| v.track = drive_state[drive].track; |
| v.maxblock = drive_state[drive].maxblock; |
| v.maxtrack = drive_state[drive].maxtrack; |
| v.generation = drive_state[drive].generation; |
| v.keep_data = drive_state[drive].keep_data; |
| v.fd_ref = drive_state[drive].fd_ref; |
| v.fd_device = drive_state[drive].fd_device; |
| v.last_checked = drive_state[drive].last_checked; |
| v.dmabuf = (uintptr_t) drive_state[drive].dmabuf; |
| v.bufblocks = drive_state[drive].bufblocks; |
| mutex_unlock(&floppy_mutex); |
| |
| if (copy_to_user(arg, &v, sizeof(struct compat_floppy_drive_struct))) |
| return -EFAULT; |
| return 0; |
| Eintr: |
| mutex_unlock(&floppy_mutex); |
| return -EINTR; |
| } |
| |
| static int compat_getfdcstat(int drive, |
| struct compat_floppy_fdc_state __user *arg) |
| { |
| struct compat_floppy_fdc_state v32; |
| struct floppy_fdc_state v; |
| |
| mutex_lock(&floppy_mutex); |
| v = fdc_state[FDC(drive)]; |
| mutex_unlock(&floppy_mutex); |
| |
| memset(&v32, 0, sizeof(struct compat_floppy_fdc_state)); |
| v32.spec1 = v.spec1; |
| v32.spec2 = v.spec2; |
| v32.dtr = v.dtr; |
| v32.version = v.version; |
| v32.dor = v.dor; |
| v32.address = v.address; |
| v32.rawcmd = v.rawcmd; |
| v32.reset = v.reset; |
| v32.need_configure = v.need_configure; |
| v32.perp_mode = v.perp_mode; |
| v32.has_fifo = v.has_fifo; |
| v32.driver_version = v.driver_version; |
| memcpy(v32.track, v.track, 4); |
| if (copy_to_user(arg, &v32, sizeof(struct compat_floppy_fdc_state))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int compat_werrorget(int drive, |
| struct compat_floppy_write_errors __user *arg) |
| { |
| struct compat_floppy_write_errors v32; |
| struct floppy_write_errors v; |
| |
| memset(&v32, 0, sizeof(struct compat_floppy_write_errors)); |
| mutex_lock(&floppy_mutex); |
| v = write_errors[drive]; |
| mutex_unlock(&floppy_mutex); |
| v32.write_errors = v.write_errors; |
| v32.first_error_sector = v.first_error_sector; |
| v32.first_error_generation = v.first_error_generation; |
| v32.last_error_sector = v.last_error_sector; |
| v32.last_error_generation = v.last_error_generation; |
| v32.badness = v.badness; |
| if (copy_to_user(arg, &v32, sizeof(struct compat_floppy_write_errors))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int fd_compat_ioctl(struct block_device *bdev, blk_mode_t mode, |
| unsigned int cmd, unsigned long param) |
| { |
| int drive = (long)bdev->bd_disk->private_data; |
| switch (cmd) { |
| case CDROMEJECT: /* CD-ROM eject */ |
| case 0x6470: /* SunOS floppy eject */ |
| |
| case FDMSGON: |
| case FDMSGOFF: |
| case FDSETEMSGTRESH: |
| case FDFLUSH: |
| case FDWERRORCLR: |
| case FDEJECT: |
| case FDCLRPRM: |
| case FDFMTBEG: |
| case FDRESET: |
| case FDTWADDLE: |
| return fd_ioctl(bdev, mode, cmd, param); |
| case FDSETMAXERRS: |
| case FDGETMAXERRS: |
| case FDGETDRVTYP: |
| case FDFMTEND: |
| case FDFMTTRK: |
| case FDRAWCMD: |
| return fd_ioctl(bdev, mode, cmd, |
| (unsigned long)compat_ptr(param)); |
| case FDSETPRM32: |
| case FDDEFPRM32: |
| return compat_set_geometry(bdev, mode, cmd, compat_ptr(param)); |
| case FDGETPRM32: |
| return compat_get_prm(drive, compat_ptr(param)); |
| case FDSETDRVPRM32: |
| return compat_setdrvprm(drive, compat_ptr(param)); |
| case FDGETDRVPRM32: |
| return compat_getdrvprm(drive, compat_ptr(param)); |
| case FDPOLLDRVSTAT32: |
| return compat_getdrvstat(drive, true, compat_ptr(param)); |
| case FDGETDRVSTAT32: |
| return compat_getdrvstat(drive, false, compat_ptr(param)); |
| case FDGETFDCSTAT32: |
| return compat_getfdcstat(drive, compat_ptr(param)); |
| case FDWERRORGET32: |
| return compat_werrorget(drive, compat_ptr(param)); |
| } |
| return -EINVAL; |
| } |
| #endif |
| |
| static void __init config_types(void) |
| { |
| bool has_drive = false; |
| int drive; |
| |
| /* read drive info out of physical CMOS */ |
| drive = 0; |
| if (!drive_params[drive].cmos) |
| drive_params[drive].cmos = FLOPPY0_TYPE; |
| drive = 1; |
| if (!drive_params[drive].cmos) |
| drive_params[drive].cmos = FLOPPY1_TYPE; |
| |
| /* FIXME: additional physical CMOS drive detection should go here */ |
| |
| for (drive = 0; drive < N_DRIVE; drive++) { |
| unsigned int type = drive_params[drive].cmos; |
| struct floppy_drive_params *params; |
| const char *name = NULL; |
| char temparea[32]; |
| |
| if (type < ARRAY_SIZE(default_drive_params)) { |
| params = &default_drive_params[type].params; |
| if (type) { |
| name = default_drive_params[type].name; |
| allowed_drive_mask |= 1 << drive; |
| } else |
| allowed_drive_mask &= ~(1 << drive); |
| } else { |
| params = &default_drive_params[0].params; |
| snprintf(temparea, sizeof(temparea), |
| "unknown type %d (usb?)", type); |
| name = temparea; |
| } |
| if (name) { |
| const char *prepend; |
| if (!has_drive) { |
| prepend = ""; |
| has_drive = true; |
| pr_info("Floppy drive(s):"); |
| } else { |
| prepend = ","; |
| } |
| |
| pr_cont("%s fd%d is %s", prepend, drive, name); |
| } |
| drive_params[drive] = *params; |
| } |
| |
| if (has_drive) |
| pr_cont("\n"); |
| } |
| |
| static void floppy_release(struct gendisk *disk) |
| { |
| int drive = (long)disk->private_data; |
| |
| mutex_lock(&floppy_mutex); |
| mutex_lock(&open_lock); |
| if (!drive_state[drive].fd_ref--) { |
| DPRINT("floppy_release with fd_ref == 0"); |
| drive_state[drive].fd_ref = 0; |
| } |
| if (!drive_state[drive].fd_ref) |
| opened_disk[drive] = NULL; |
| mutex_unlock(&open_lock); |
| mutex_unlock(&floppy_mutex); |
| } |
| |
| /* |
| * floppy_open check for aliasing (/dev/fd0 can be the same as |
| * /dev/PS0 etc), and disallows simultaneous access to the same |
| * drive with different device numbers. |
| */ |
| static int floppy_open(struct gendisk *disk, blk_mode_t mode) |
| { |
| int drive = (long)disk->private_data; |
| int old_dev, new_dev; |
| int try; |
| int res = -EBUSY; |
| char *tmp; |
| |
| mutex_lock(&floppy_mutex); |
| mutex_lock(&open_lock); |
| old_dev = drive_state[drive].fd_device; |
| if (opened_disk[drive] && opened_disk[drive] != disk) |
| goto out2; |
| |
| if (!drive_state[drive].fd_ref && (drive_params[drive].flags & FD_BROKEN_DCL)) { |
| set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags); |
| set_bit(FD_VERIFY_BIT, &drive_state[drive].flags); |
| } |
| |
| drive_state[drive].fd_ref++; |
| |
| opened_disk[drive] = disk; |
| |
| res = -ENXIO; |
| |
| if (!floppy_track_buffer) { |
| /* if opening an ED drive, reserve a big buffer, |
| * else reserve a small one */ |
| if ((drive_params[drive].cmos == 6) || (drive_params[drive].cmos == 5)) |
| try = 64; /* Only 48 actually useful */ |
| else |
| try = 32; /* Only 24 actually useful */ |
| |
| tmp = (char *)fd_dma_mem_alloc(1024 * try); |
| if (!tmp && !floppy_track_buffer) { |
| try >>= 1; /* buffer only one side */ |
| INFBOUND(try, 16); |
| tmp = (char *)fd_dma_mem_alloc(1024 * try); |
| } |
| if (!tmp && !floppy_track_buffer) |
| fallback_on_nodma_alloc(&tmp, 2048 * try); |
| if (!tmp && !floppy_track_buffer) { |
| DPRINT("Unable to allocate DMA memory\n"); |
| goto out; |
| } |
| if (floppy_track_buffer) { |
| if (tmp) |
| fd_dma_mem_free((unsigned long)tmp, try * 1024); |
| } else { |
| buffer_min = buffer_max = -1; |
| floppy_track_buffer = tmp; |
| max_buffer_sectors = try; |
| } |
| } |
| |
| new_dev = disk->first_minor; |
| drive_state[drive].fd_device = new_dev; |
| set_capacity(disks[drive][ITYPE(new_dev)], floppy_sizes[new_dev]); |
| if (old_dev != -1 && old_dev != new_dev) { |
| if (buffer_drive == drive) |
| buffer_track = -1; |
| } |
| |
| if (fdc_state[FDC(drive)].rawcmd == 1) |
| fdc_state[FDC(drive)].rawcmd = 2; |
| if (!(mode & BLK_OPEN_NDELAY)) { |
| if (mode & (BLK_OPEN_READ | BLK_OPEN_WRITE)) { |
| drive_state[drive].last_checked = 0; |
| clear_bit(FD_OPEN_SHOULD_FAIL_BIT, |
| &drive_state[drive].flags); |
| if (disk_check_media_change(disk)) |
| floppy_revalidate(disk); |
| if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags)) |
| goto out; |
| if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags)) |
| goto out; |
| } |
| res = -EROFS; |
| if ((mode & BLK_OPEN_WRITE) && |
| !test_bit(FD_DISK_WRITABLE_BIT, &drive_state[drive].flags)) |
| goto out; |
| } |
| mutex_unlock(&open_lock); |
| mutex_unlock(&floppy_mutex); |
| return 0; |
| out: |
| drive_state[drive].fd_ref--; |
| |
| if (!drive_state[drive].fd_ref) |
| opened_disk[drive] = NULL; |
| out2: |
| mutex_unlock(&open_lock); |
| mutex_unlock(&floppy_mutex); |
| return res; |
| } |
| |
| /* |
| * Check if the disk has been changed or if a change has been faked. |
| */ |
| static unsigned int floppy_check_events(struct gendisk *disk, |
| unsigned int clearing) |
| { |
| int drive = (long)disk->private_data; |
| |
| if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) || |
| test_bit(FD_VERIFY_BIT, &drive_state[drive].flags)) |
| return DISK_EVENT_MEDIA_CHANGE; |
| |
| if (time_after(jiffies, drive_state[drive].last_checked + drive_params[drive].checkfreq)) { |
| if (lock_fdc(drive)) |
| return 0; |
| poll_drive(false, 0); |
| process_fd_request(); |
| } |
| |
| if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) || |
| test_bit(FD_VERIFY_BIT, &drive_state[drive].flags) || |
| test_bit(drive, &fake_change) || |
| drive_no_geom(drive)) |
| return DISK_EVENT_MEDIA_CHANGE; |
| return 0; |
| } |
| |
| /* |
| * This implements "read block 0" for floppy_revalidate(). |
| * Needed for format autodetection, checking whether there is |
| * a disk in the drive, and whether that disk is writable. |
| */ |
| |
| struct rb0_cbdata { |
| int drive; |
| struct completion complete; |
| }; |
| |
| static void floppy_rb0_cb(struct bio *bio) |
| { |
| struct rb0_cbdata *cbdata = (struct rb0_cbdata *)bio->bi_private; |
| int drive = cbdata->drive; |
| |
| if (bio->bi_status) { |
| pr_info("floppy: error %d while reading block 0\n", |
| bio->bi_status); |
| set_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags); |
| } |
| complete(&cbdata->complete); |
| } |
| |
| static int __floppy_read_block_0(struct block_device *bdev, int drive) |
| { |
| struct bio bio; |
| struct bio_vec bio_vec; |
| struct page *page; |
| struct rb0_cbdata cbdata; |
| |
| page = alloc_page(GFP_NOIO); |
| if (!page) { |
| process_fd_request(); |
| return -ENOMEM; |
| } |
| |
| cbdata.drive = drive; |
| |
| bio_init(&bio, bdev, &bio_vec, 1, REQ_OP_READ); |
| __bio_add_page(&bio, page, block_size(bdev), 0); |
| |
| bio.bi_iter.bi_sector = 0; |
| bio.bi_flags |= (1 << BIO_QUIET); |
| bio.bi_private = &cbdata; |
| bio.bi_end_io = floppy_rb0_cb; |
| |
| init_completion(&cbdata.complete); |
| |
| submit_bio(&bio); |
| process_fd_request(); |
| |
| wait_for_completion(&cbdata.complete); |
| |
| __free_page(page); |
| |
| return 0; |
| } |
| |
| /* revalidate the floppy disk, i.e. trigger format autodetection by reading |
| * the bootblock (block 0). "Autodetection" is also needed to check whether |
| * there is a disk in the drive at all... Thus we also do it for fixed |
| * geometry formats */ |
| static int floppy_revalidate(struct gendisk *disk) |
| { |
| int drive = (long)disk->private_data; |
| int cf; |
| int res = 0; |
| |
| if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) || |
| test_bit(FD_VERIFY_BIT, &drive_state[drive].flags) || |
| test_bit(drive, &fake_change) || |
| drive_no_geom(drive)) { |
| if (WARN(atomic_read(&usage_count) == 0, |
| "VFS: revalidate called on non-open device.\n")) |
| return -EFAULT; |
| |
| res = lock_fdc(drive); |
| if (res) |
| return res; |
| cf = (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) || |
| test_bit(FD_VERIFY_BIT, &drive_state[drive].flags)); |
| if (!(cf || test_bit(drive, &fake_change) || drive_no_geom(drive))) { |
| process_fd_request(); /*already done by another thread */ |
| return 0; |
| } |
| drive_state[drive].maxblock = 0; |
| drive_state[drive].maxtrack = 0; |
| if (buffer_drive == drive) |
| buffer_track = -1; |
| clear_bit(drive, &fake_change); |
| clear_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags); |
| if (cf) |
| drive_state[drive].generation++; |
| if (drive_no_geom(drive)) { |
| /* auto-sensing */ |
| res = __floppy_read_block_0(opened_disk[drive]->part0, |
| drive); |
| } else { |
| if (cf) |
| poll_drive(false, FD_RAW_NEED_DISK); |
| process_fd_request(); |
| } |
| } |
| set_capacity(disk, floppy_sizes[drive_state[drive].fd_device]); |
| return res; |
| } |
| |
| static const struct block_device_operations floppy_fops = { |
| .owner = THIS_MODULE, |
| .open = floppy_open, |
| .release = floppy_release, |
| .ioctl = fd_ioctl, |
| .getgeo = fd_getgeo, |
| .check_events = floppy_check_events, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = fd_compat_ioctl, |
| #endif |
| }; |
| |
| /* |
| * Floppy Driver initialization |
| * ============================= |
| */ |
| |
| /* Determine the floppy disk controller type */ |
| /* This routine was written by David C. Niemi */ |
| static char __init get_fdc_version(int fdc) |
| { |
| int r; |
| |
| output_byte(fdc, FD_DUMPREGS); /* 82072 and better know DUMPREGS */ |
| if (fdc_state[fdc].reset) |
| return FDC_NONE; |
| r = result(fdc); |
| if (r <= 0x00) |
| return FDC_NONE; /* No FDC present ??? */ |
| if ((r == 1) && (reply_buffer[ST0] == 0x80)) { |
| pr_info("FDC %d is an 8272A\n", fdc); |
| return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ |
| } |
| if (r != 10) { |
| pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", |
| fdc, r); |
| return FDC_UNKNOWN; |
| } |
| |
| if (!fdc_configure(fdc)) { |
| pr_info("FDC %d is an 82072\n", fdc); |
| return FDC_82072; /* 82072 doesn't know CONFIGURE */ |
| } |
| |
| output_byte(fdc, FD_PERPENDICULAR); |
| if (need_more_output(fdc) == MORE_OUTPUT) { |
| output_byte(fdc, 0); |
| } else { |
| pr_info("FDC %d is an 82072A\n", fdc); |
| return FDC_82072A; /* 82072A as found on Sparcs. */ |
| } |
| |
| output_byte(fdc, FD_UNLOCK); |
| r = result(fdc); |
| if ((r == 1) && (reply_buffer[ST0] == 0x80)) { |
| pr_info("FDC %d is a pre-1991 82077\n", fdc); |
| return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know |
| * LOCK/UNLOCK */ |
| } |
| if ((r != 1) || (reply_buffer[ST0] != 0x00)) { |
| pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", |
| fdc, r); |
| return FDC_UNKNOWN; |
| } |
| output_byte(fdc, FD_PARTID); |
| r = result(fdc); |
| if (r != 1) { |
| pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n", |
| fdc, r); |
| return FDC_UNKNOWN; |
| } |
| if (reply_buffer[ST0] == 0x80) { |
| pr_info("FDC %d is a post-1991 82077\n", fdc); |
| return FDC_82077; /* Revised 82077AA passes all the tests */ |
| } |
| switch (reply_buffer[ST0] >> 5) { |
| case 0x0: |
| /* Either a 82078-1 or a 82078SL running at 5Volt */ |
| pr_info("FDC %d is an 82078.\n", fdc); |
| return FDC_82078; |
| case 0x1: |
| pr_info("FDC %d is a 44pin 82078\n", fdc); |
| return FDC_82078; |
| case 0x2: |
| pr_info("FDC %d is a S82078B\n", fdc); |
| return FDC_S82078B; |
| case 0x3: |
| pr_info("FDC %d is a National Semiconductor PC87306\n", fdc); |
| return FDC_87306; |
| default: |
| pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n", |
| fdc, reply_buffer[ST0] >> 5); |
| return FDC_82078_UNKN; |
| } |
| } /* get_fdc_version */ |
| |
| /* lilo configuration */ |
| |
| static void __init floppy_set_flags(int *ints, int param, int param2) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { |
| if (param) |
| default_drive_params[i].params.flags |= param2; |
| else |
| default_drive_params[i].params.flags &= ~param2; |
| } |
| DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param); |
| } |
| |
| static void __init daring(int *ints, int param, int param2) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { |
| if (param) { |
| default_drive_params[i].params.select_delay = 0; |
| default_drive_params[i].params.flags |= |
| FD_SILENT_DCL_CLEAR; |
| } else { |
| default_drive_params[i].params.select_delay = |
| 2 * HZ / 100; |
| default_drive_params[i].params.flags &= |
| ~FD_SILENT_DCL_CLEAR; |
| } |
| } |
| DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); |
| } |
| |
| static void __init set_cmos(int *ints, int dummy, int dummy2) |
| { |
| int current_drive = 0; |
| |
| if (ints[0] != 2) { |
| DPRINT("wrong number of parameters for CMOS\n"); |
| return; |
| } |
| current_drive = ints[1]; |
| if (current_drive < 0 || current_drive >= 8) { |
| DPRINT("bad drive for set_cmos\n"); |
| return; |
| } |
| #if N_FDC > 1 |
| if (current_drive >= 4 && !FDC2) |
| FDC2 = 0x370; |
| #endif |
| drive_params[current_drive].cmos = ints[2]; |
| DPRINT("setting CMOS code to %d\n", ints[2]); |
| } |
| |
| static struct param_table { |
| const char *name; |
| void (*fn) (int *ints, int param, int param2); |
| int *var; |
| int def_param; |
| int param2; |
| } config_params[] __initdata = { |
| {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ |
| {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ |
| {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0}, |
| {"irq", NULL, &FLOPPY_IRQ, 6, 0}, |
| {"dma", NULL, &FLOPPY_DMA, 2, 0}, |
| {"daring", daring, NULL, 1, 0}, |
| #if N_FDC > 1 |
| {"two_fdc", NULL, &FDC2, 0x370, 0}, |
| {"one_fdc", NULL, &FDC2, 0, 0}, |
| #endif |
| {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL}, |
| {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL}, |
| {"messages", floppy_set_flags, NULL, 1, FTD_MSG}, |
| {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR}, |
| {"debug", floppy_set_flags, NULL, 1, FD_DEBUG}, |
| {"nodma", NULL, &can_use_virtual_dma, 1, 0}, |
| {"omnibook", NULL, &can_use_virtual_dma, 1, 0}, |
| {"yesdma", NULL, &can_use_virtual_dma, 0, 0}, |
| {"fifo_depth", NULL, &fifo_depth, 0xa, 0}, |
| {"nofifo", NULL, &no_fifo, 0x20, 0}, |
| {"usefifo", NULL, &no_fifo, 0, 0}, |
| {"cmos", set_cmos, NULL, 0, 0}, |
| {"slow", NULL, &slow_floppy, 1, 0}, |
| {"unexpected_interrupts", NULL, &print_unex, 1, 0}, |
| {"no_unexpected_interrupts", NULL, &print_unex, 0, 0}, |
| {"L40SX", NULL, &print_unex, 0, 0} |
| |
| EXTRA_FLOPPY_PARAMS |
| }; |
| |
| static int __init floppy_setup(char *str) |
| { |
| int i; |
| int param; |
| int ints[11]; |
| |
| str = get_options(str, ARRAY_SIZE(ints), ints); |
| if (str) { |
| for (i = 0; i < ARRAY_SIZE(config_params); i++) { |
| if (strcmp(str, config_params[i].name) == 0) { |
| if (ints[0]) |
| param = ints[1]; |
| else |
| param = config_params[i].def_param; |
| if (config_params[i].fn) |
| config_params[i].fn(ints, param, |
| config_params[i]. |
| param2); |
| if (config_params[i].var) { |
| DPRINT("%s=%d\n", str, param); |
| *config_params[i].var = param; |
| } |
| return 1; |
| } |
| } |
| } |
| if (str) { |
| DPRINT("unknown floppy option [%s]\n", str); |
| |
| DPRINT("allowed options are:"); |
| for (i = 0; i < ARRAY_SIZE(config_params); i++) |
| pr_cont(" %s", config_params[i].name); |
| pr_cont("\n"); |
| } else |
| DPRINT("botched floppy option\n"); |
| DPRINT("Read Documentation/admin-guide/blockdev/floppy.rst\n"); |
| return 0; |
| } |
| |
| static int have_no_fdc = -ENODEV; |
| |
| static ssize_t floppy_cmos_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct platform_device *p = to_platform_device(dev); |
| int drive; |
| |
| drive = p->id; |
| return sprintf(buf, "%X\n", drive_params[drive].cmos); |
| } |
| |
| static DEVICE_ATTR(cmos, 0444, floppy_cmos_show, NULL); |
| |
| static struct attribute *floppy_dev_attrs[] = { |
| &dev_attr_cmos.attr, |
| NULL |
| }; |
| |
| ATTRIBUTE_GROUPS(floppy_dev); |
| |
| static void floppy_device_release(struct device *dev) |
| { |
| } |
| |
| static int floppy_resume(struct device *dev) |
| { |
| int fdc; |
| int saved_drive; |
| |
| saved_drive = current_drive; |
| for (fdc = 0; fdc < N_FDC; fdc++) |
| if (fdc_state[fdc].address != -1) |
| user_reset_fdc(REVDRIVE(fdc, 0), FD_RESET_ALWAYS, false); |
| set_fdc(saved_drive); |
| return 0; |
| } |
| |
| static const struct dev_pm_ops floppy_pm_ops = { |
| .resume = floppy_resume, |
| .restore = floppy_resume, |
| }; |
| |
| static struct platform_driver floppy_driver = { |
| .driver = { |
| .name = "floppy", |
| .pm = &floppy_pm_ops, |
| }, |
| }; |
| |
| static const struct blk_mq_ops floppy_mq_ops = { |
| .queue_rq = floppy_queue_rq, |
| }; |
| |
| static struct platform_device floppy_device[N_DRIVE]; |
| static bool registered[N_DRIVE]; |
| |
| static bool floppy_available(int drive) |
| { |
| if (!(allowed_drive_mask & (1 << drive))) |
| return false; |
| if (fdc_state[FDC(drive)].version == FDC_NONE) |
| return false; |
| return true; |
| } |
| |
| static int floppy_alloc_disk(unsigned int drive, unsigned int type) |
| { |
| struct gendisk *disk; |
| |
| disk = blk_mq_alloc_disk(&tag_sets[drive], NULL); |
| if (IS_ERR(disk)) |
| return PTR_ERR(disk); |
| |
| blk_queue_max_hw_sectors(disk->queue, 64); |
| disk->major = FLOPPY_MAJOR; |
| disk->first_minor = TOMINOR(drive) | (type << 2); |
| disk->minors = 1; |
| disk->fops = &floppy_fops; |
| disk->flags |= GENHD_FL_NO_PART; |
| disk->events = DISK_EVENT_MEDIA_CHANGE; |
| if (type) |
| sprintf(disk->disk_name, "fd%d_type%d", drive, type); |
| else |
| sprintf(disk->disk_name, "fd%d", drive); |
| /* to be cleaned up... */ |
| disk->private_data = (void *)(long)drive; |
| disk->flags |= GENHD_FL_REMOVABLE; |
| |
| disks[drive][type] = disk; |
| return 0; |
| } |
| |
| static DEFINE_MUTEX(floppy_probe_lock); |
| |
| static void floppy_probe(dev_t dev) |
| { |
| unsigned int drive = (MINOR(dev) & 3) | ((MINOR(dev) & 0x80) >> 5); |
| unsigned int type = (MINOR(dev) >> 2) & 0x1f; |
| |
| if (drive >= N_DRIVE || !floppy_available(drive) || |
| type >= ARRAY_SIZE(floppy_type)) |
| return; |
| |
| mutex_lock(&floppy_probe_lock); |
| if (disks[drive][type]) |
| goto out; |
| if (floppy_alloc_disk(drive, type)) |
| goto out; |
| if (add_disk(disks[drive][type])) |
| goto cleanup_disk; |
| out: |
| mutex_unlock(&floppy_probe_lock); |
| return; |
| |
| cleanup_disk: |
| put_disk(disks[drive][type]); |
| disks[drive][type] = NULL; |
| mutex_unlock(&floppy_probe_lock); |
| } |
| |
| static int __init do_floppy_init(void) |
| { |
| int i, unit, drive, err; |
| |
| set_debugt(); |
| interruptjiffies = resultjiffies = jiffies; |
| |
| #if defined(CONFIG_PPC) |
| if (check_legacy_ioport(FDC1)) |
| return -ENODEV; |
| #endif |
| |
| raw_cmd = NULL; |
| |
| floppy_wq = alloc_ordered_workqueue("floppy", 0); |
| if (!floppy_wq) |
| return -ENOMEM; |
| |
| for (drive = 0; drive < N_DRIVE; drive++) { |
| memset(&tag_sets[drive], 0, sizeof(tag_sets[drive])); |
| tag_sets[drive].ops = &floppy_mq_ops; |
| tag_sets[drive].nr_hw_queues = 1; |
| tag_sets[drive].nr_maps = 1; |
| tag_sets[drive].queue_depth = 2; |
| tag_sets[drive].numa_node = NUMA_NO_NODE; |
| tag_sets[drive].flags = BLK_MQ_F_SHOULD_MERGE; |
| err = blk_mq_alloc_tag_set(&tag_sets[drive]); |
| if (err) |
| goto out_put_disk; |
| |
| err = floppy_alloc_disk(drive, 0); |
| if (err) { |
| blk_mq_free_tag_set(&tag_sets[drive]); |
| goto out_put_disk; |
| } |
| |
| timer_setup(&motor_off_timer[drive], motor_off_callback, 0); |
| } |
| |
| err = __register_blkdev(FLOPPY_MAJOR, "fd", floppy_probe); |
| if (err) |
| goto out_put_disk; |
| |
| err = platform_driver_register(&floppy_driver); |
| if (err) |
| goto out_unreg_blkdev; |
| |
| for (i = 0; i < 256; i++) |
| if (ITYPE(i)) |
| floppy_sizes[i] = floppy_type[ITYPE(i)].size; |
| else |
| floppy_sizes[i] = MAX_DISK_SIZE << 1; |
| |
| reschedule_timeout(MAXTIMEOUT, "floppy init"); |
| config_types(); |
| |
| for (i = 0; i < N_FDC; i++) { |
| memset(&fdc_state[i], 0, sizeof(*fdc_state)); |
| fdc_state[i].dtr = -1; |
| fdc_state[i].dor = 0x4; |
| #if defined(__sparc__) || defined(__mc68000__) |
| /*sparcs/sun3x don't have a DOR reset which we can fall back on to */ |
| #ifdef __mc68000__ |
| if (MACH_IS_SUN3X) |
| #endif |
| fdc_state[i].version = FDC_82072A; |
| #endif |
| } |
| |
| use_virtual_dma = can_use_virtual_dma & 1; |
| fdc_state[0].address = FDC1; |
| if (fdc_state[0].address == -1) { |
| cancel_delayed_work(&fd_timeout); |
| err = -ENODEV; |
| goto out_unreg_driver; |
| } |
| #if N_FDC > 1 |
| fdc_state[1].address = FDC2; |
| #endif |
| |
| current_fdc = 0; /* reset fdc in case of unexpected interrupt */ |
| err = floppy_grab_irq_and_dma(); |
| if (err) { |
| cancel_delayed_work(&fd_timeout); |
| err = -EBUSY; |
| goto out_unreg_driver; |
| } |
| |
| /* initialise drive state */ |
| for (drive = 0; drive < N_DRIVE; drive++) { |
| memset(&drive_state[drive], 0, sizeof(drive_state[drive])); |
| memset(&write_errors[drive], 0, sizeof(write_errors[drive])); |
| set_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[drive].flags); |
| set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags); |
| set_bit(FD_VERIFY_BIT, &drive_state[drive].flags); |
| drive_state[drive].fd_device = -1; |
| floppy_track_buffer = NULL; |
| max_buffer_sectors = 0; |
| } |
| /* |
| * Small 10 msec delay to let through any interrupt that |
| * initialization might have triggered, to not |
| * confuse detection: |
| */ |
| msleep(10); |
| |
| for (i = 0; i < N_FDC; i++) { |
| fdc_state[i].driver_version = FD_DRIVER_VERSION; |
| for (unit = 0; unit < 4; unit++) |
| fdc_state[i].track[unit] = 0; |
| if (fdc_state[i].address == -1) |
| continue; |
| fdc_state[i].rawcmd = 2; |
| if (user_reset_fdc(REVDRIVE(i, 0), FD_RESET_ALWAYS, false)) { |
| /* free ioports reserved by floppy_grab_irq_and_dma() */ |
| floppy_release_regions(i); |
| fdc_state[i].address = -1; |
| fdc_state[i].version = FDC_NONE; |
| continue; |
| } |
| /* Try to determine the floppy controller type */ |
| fdc_state[i].version = get_fdc_version(i); |
| if (fdc_state[i].version == FDC_NONE) { |
| /* free ioports reserved by floppy_grab_irq_and_dma() */ |
| floppy_release_regions(i); |
| fdc_state[i].address = -1; |
| continue; |
| } |
| if (can_use_virtual_dma == 2 && |
| fdc_state[i].version < FDC_82072A) |
| can_use_virtual_dma = 0; |
| |
| have_no_fdc = 0; |
| /* Not all FDCs seem to be able to handle the version command |
| * properly, so force a reset for the standard FDC clones, |
| * to avoid interrupt garbage. |
| */ |
| user_reset_fdc(REVDRIVE(i, 0), FD_RESET_ALWAYS, false); |
| } |
| current_fdc = 0; |
| cancel_delayed_work(&fd_timeout); |
| current_drive = 0; |
| initialized = true; |
| if (have_no_fdc) { |
| DPRINT("no floppy controllers found\n"); |
| err = have_no_fdc; |
| goto out_release_dma; |
| } |
| |
| for (drive = 0; drive < N_DRIVE; drive++) { |
| if (!floppy_available(drive)) |
| continue; |
| |
| floppy_device[drive].name = floppy_device_name; |
| floppy_device[drive].id = drive; |
| floppy_device[drive].dev.release = floppy_device_release; |
| floppy_device[drive].dev.groups = floppy_dev_groups; |
| |
| err = platform_device_register(&floppy_device[drive]); |
| if (err) |
| goto out_remove_drives; |
| |
| registered[drive] = true; |
| |
| err = device_add_disk(&floppy_device[drive].dev, |
| disks[drive][0], NULL); |
| if (err) |
| goto out_remove_drives; |
| } |
| |
| return 0; |
| |
| out_remove_drives: |
| while (drive--) { |
| if (floppy_available(drive)) { |
| del_gendisk(disks[drive][0]); |
| if (registered[drive]) |
| platform_device_unregister(&floppy_device[drive]); |
| } |
| } |
| out_release_dma: |
| if (atomic_read(&usage_count)) |
| floppy_release_irq_and_dma(); |
| out_unreg_driver: |
| platform_driver_unregister(&floppy_driver); |
| out_unreg_blkdev: |
| unregister_blkdev(FLOPPY_MAJOR, "fd"); |
| out_put_disk: |
| destroy_workqueue(floppy_wq); |
| for (drive = 0; drive < N_DRIVE; drive++) { |
| if (!disks[drive][0]) |
| break; |
| del_timer_sync(&motor_off_timer[drive]); |
| put_disk(disks[drive][0]); |
| blk_mq_free_tag_set(&tag_sets[drive]); |
| } |
| return err; |
| } |
| |
| #ifndef MODULE |
| static __init void floppy_async_init(void *data, async_cookie_t cookie) |
| { |
| do_floppy_init(); |
| } |
| #endif |
| |
| static int __init floppy_init(void) |
| { |
| #ifdef MODULE |
| return do_floppy_init(); |
| #else |
| /* Don't hold up the bootup by the floppy initialization */ |
| async_schedule(floppy_async_init, NULL); |
| return 0; |
| #endif |
| } |
| |
| static const struct io_region { |
| int offset; |
| int size; |
| } io_regions[] = { |
| { 2, 1 }, |
| /* address + 3 is sometimes reserved by pnp bios for motherboard */ |
| { 4, 2 }, |
| /* address + 6 is reserved, and may be taken by IDE. |
| * Unfortunately, Adaptec doesn't know this :-(, */ |
| { 7, 1 }, |
| }; |
| |
| static void floppy_release_allocated_regions(int fdc, const struct io_region *p) |
| { |
| while (p != io_regions) { |
| p--; |
| release_region(fdc_state[fdc].address + p->offset, p->size); |
| } |
| } |
| |
| #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)])) |
| |
| static int floppy_request_regions(int fdc) |
| { |
| const struct io_region *p; |
| |
| for (p = io_regions; p < ARRAY_END(io_regions); p++) { |
| if (!request_region(fdc_state[fdc].address + p->offset, |
| p->size, "floppy")) { |
| DPRINT("Floppy io-port 0x%04lx in use\n", |
| fdc_state[fdc].address + p->offset); |
| floppy_release_allocated_regions(fdc, p); |
| return -EBUSY; |
| } |
| } |
| return 0; |
| } |
| |
| static void floppy_release_regions(int fdc) |
| { |
| floppy_release_allocated_regions(fdc, ARRAY_END(io_regions)); |
| } |
| |
| static int floppy_grab_irq_and_dma(void) |
| { |
| int fdc; |
| |
| if (atomic_inc_return(&usage_count) > 1) |
| return 0; |
| |
| /* |
| * We might have scheduled a free_irq(), wait it to |
| * drain first: |
| */ |
| flush_workqueue(floppy_wq); |
| |
| if (fd_request_irq()) { |
| DPRINT("Unable to grab IRQ%d for the floppy driver\n", |
| FLOPPY_IRQ); |
| atomic_dec(&usage_count); |
| return -1; |
| } |
| if (fd_request_dma()) { |
| DPRINT("Unable to grab DMA%d for the floppy driver\n", |
| FLOPPY_DMA); |
| if (can_use_virtual_dma & 2) |
| use_virtual_dma = can_use_virtual_dma = 1; |
| if (!(can_use_virtual_dma & 1)) { |
| fd_free_irq(); |
| atomic_dec(&usage_count); |
| return -1; |
| } |
| } |
| |
| for (fdc = 0; fdc < N_FDC; fdc++) { |
| if (fdc_state[fdc].address != -1) { |
| if (floppy_request_regions(fdc)) |
| goto cleanup; |
| } |
| } |
| for (fdc = 0; fdc < N_FDC; fdc++) { |
| if (fdc_state[fdc].address != -1) { |
| reset_fdc_info(fdc, 1); |
| fdc_outb(fdc_state[fdc].dor, fdc, FD_DOR); |
| } |
| } |
| |
| set_dor(0, ~0, 8); /* avoid immediate interrupt */ |
| |
| for (fdc = 0; fdc < N_FDC; fdc++) |
| if (fdc_state[fdc].address != -1) |
| fdc_outb(fdc_state[fdc].dor, fdc, FD_DOR); |
| /* |
| * The driver will try and free resources and relies on us |
| * to know if they were allocated or not. |
| */ |
| current_fdc = 0; |
| irqdma_allocated = 1; |
| return 0; |
| cleanup: |
| fd_free_irq(); |
| fd_free_dma(); |
| while (--fdc >= 0) |
| floppy_release_regions(fdc); |
| current_fdc = 0; |
| atomic_dec(&usage_count); |
| return -1; |
| } |
| |
| static void floppy_release_irq_and_dma(void) |
| { |
| int fdc; |
| #ifndef __sparc__ |
| int drive; |
| #endif |
| long tmpsize; |
| unsigned long tmpaddr; |
| |
| if (!atomic_dec_and_test(&usage_count)) |
| return; |
| |
| if (irqdma_allocated) { |
| fd_disable_dma(); |
| fd_free_dma(); |
| fd_free_irq(); |
| irqdma_allocated = 0; |
| } |
| set_dor(0, ~0, 8); |
| #if N_FDC > 1 |
| set_dor(1, ~8, 0); |
| #endif |
| |
| if (floppy_track_buffer && max_buffer_sectors) { |
| tmpsize = max_buffer_sectors * 1024; |
| tmpaddr = (unsigned long)floppy_track_buffer; |
| floppy_track_buffer = NULL; |
| max_buffer_sectors = 0; |
| buffer_min = buffer_max = -1; |
| fd_dma_mem_free(tmpaddr, tmpsize); |
| } |
| #ifndef __sparc__ |
| for (drive = 0; drive < N_FDC * 4; drive++) |
| if (timer_pending(motor_off_timer + drive)) |
| pr_info("motor off timer %d still active\n", drive); |
| #endif |
| |
| if (delayed_work_pending(&fd_timeout)) |
| pr_info("floppy timer still active:%s\n", timeout_message); |
| if (delayed_work_pending(&fd_timer)) |
| pr_info("auxiliary floppy timer still active\n"); |
| if (work_pending(&floppy_work)) |
| pr_info("work still pending\n"); |
| for (fdc = 0; fdc < N_FDC; fdc++) |
| if (fdc_state[fdc].address != -1) |
| floppy_release_regions(fdc); |
| } |
| |
| #ifdef MODULE |
| |
| static char *floppy; |
| |
| static void __init parse_floppy_cfg_string(char *cfg) |
| { |
| char *ptr; |
| |
| while (*cfg) { |
| ptr = cfg; |
| while (*cfg && *cfg != ' ' && *cfg != '\t') |
| cfg++; |
| if (*cfg) { |
| *cfg = '\0'; |
| cfg++; |
| } |
| if (*ptr) |
| floppy_setup(ptr); |
| } |
| } |
| |
| static int __init floppy_module_init(void) |
| { |
| if (floppy) |
| parse_floppy_cfg_string(floppy); |
| return floppy_init(); |
| } |
| module_init(floppy_module_init); |
| |
| static void __exit floppy_module_exit(void) |
| { |
| int drive, i; |
| |
| unregister_blkdev(FLOPPY_MAJOR, "fd"); |
| platform_driver_unregister(&floppy_driver); |
| |
| destroy_workqueue(floppy_wq); |
| |
| for (drive = 0; drive < N_DRIVE; drive++) { |
| del_timer_sync(&motor_off_timer[drive]); |
| |
| if (floppy_available(drive)) { |
| for (i = 0; i < ARRAY_SIZE(floppy_type); i++) { |
| if (disks[drive][i]) |
| del_gendisk(disks[drive][i]); |
| } |
| if (registered[drive]) |
| platform_device_unregister(&floppy_device[drive]); |
| } |
| for (i = 0; i < ARRAY_SIZE(floppy_type); i++) { |
| if (disks[drive][i]) |
| put_disk(disks[drive][i]); |
| } |
| blk_mq_free_tag_set(&tag_sets[drive]); |
| } |
| |
| cancel_delayed_work_sync(&fd_timeout); |
| cancel_delayed_work_sync(&fd_timer); |
| |
| if (atomic_read(&usage_count)) |
| floppy_release_irq_and_dma(); |
| |
| /* eject disk, if any */ |
| fd_eject(0); |
| } |
| |
| module_exit(floppy_module_exit); |
| |
| module_param(floppy, charp, 0); |
| module_param(FLOPPY_IRQ, int, 0); |
| module_param(FLOPPY_DMA, int, 0); |
| MODULE_AUTHOR("Alain L. Knaff"); |
| MODULE_LICENSE("GPL"); |
| |
| /* This doesn't actually get used other than for module information */ |
| static const struct pnp_device_id floppy_pnpids[] = { |
| {"PNP0700", 0}, |
| {} |
| }; |
| |
| MODULE_DEVICE_TABLE(pnp, floppy_pnpids); |
| |
| #else |
| |
| __setup("floppy=", floppy_setup); |
| module_init(floppy_init) |
| #endif |
| |
| MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); |
