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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * USB Cypress M8 driver
3 *
4 * Copyright (C) 2004
Alan Cox813a2242008-07-22 11:10:36 +01005 * Lonnie Mendez (dignome@gmail.com)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 * Copyright (C) 2003,2004
7 * Neil Whelchel (koyama@firstlight.net)
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
Alan Cox813a2242008-07-22 11:10:36 +010014 * See Documentation/usb/usb-serial.txt for more information on using this
15 * driver
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 *
17 * See http://geocities.com/i0xox0i for information on this driver and the
18 * earthmate usb device.
19 *
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -050020 * Lonnie Mendez <dignome@gmail.com>
21 * 4-29-2005
Alan Cox813a2242008-07-22 11:10:36 +010022 * Fixed problem where setting or retreiving the serial config would fail
23 * with EPIPE. Removed CRTS toggling so the driver behaves more like
24 * other usbserial adapters. Issued new interval of 1ms instead of the
25 * default 10ms. As a result, transfer speed has been substantially
26 * increased from avg. 850bps to avg. 3300bps. initial termios has also
27 * been modified. Cleaned up code and formatting issues so it is more
28 * readable. Replaced the C++ style comments.
Linus Torvalds1da177e2005-04-16 15:20:36 -070029 *
30 * Lonnie Mendez <dignome@gmail.com>
31 * 12-15-2004
32 * Incorporated write buffering from pl2303 driver. Fixed bug with line
33 * handling so both lines are raised in cypress_open. (was dropping rts)
34 * Various code cleanups made as well along with other misc bug fixes.
35 *
36 * Lonnie Mendez <dignome@gmail.com>
37 * 04-10-2004
38 * Driver modified to support dynamic line settings. Various improvments
39 * and features.
40 *
41 * Neil Whelchel
42 * 10-2003
43 * Driver first released.
44 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 */
46
Alan Cox813a2242008-07-22 11:10:36 +010047/* Thanks to Neil Whelchel for writing the first cypress m8 implementation
48 for linux. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070049/* Thanks to cypress for providing references for the hid reports. */
50/* Thanks to Jiang Zhang for providing links and for general help. */
Alan Cox813a2242008-07-22 11:10:36 +010051/* Code originates and was built up from ftdi_sio, belkin, pl2303 and others.*/
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#include <linux/kernel.h>
55#include <linux/errno.h>
56#include <linux/init.h>
57#include <linux/slab.h>
58#include <linux/tty.h>
59#include <linux/tty_driver.h>
60#include <linux/tty_flip.h>
61#include <linux/module.h>
62#include <linux/moduleparam.h>
63#include <linux/spinlock.h>
64#include <linux/usb.h>
Greg Kroah-Hartmana9698882006-07-11 21:22:58 -070065#include <linux/usb/serial.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070066#include <linux/serial.h>
Johan Hovold117fb8d2010-05-16 20:33:50 +020067#include <linux/kfifo.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#include <linux/delay.h>
Alan Cox813a2242008-07-22 11:10:36 +010069#include <linux/uaccess.h>
Johan Hovold0f2c2d72009-12-31 16:48:01 +010070#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#include "cypress_m8.h"
73
74
Mike Frysinger64319dd2009-12-18 16:33:01 -050075static int debug;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076static int stats;
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -050077static int interval;
Mike Frysingerc3126592009-12-18 16:33:03 -050078static int unstable_bauds;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
80/*
81 * Version Information
82 */
Johan Hovold117fb8d2010-05-16 20:33:50 +020083#define DRIVER_VERSION "v1.10"
Linus Torvalds1da177e2005-04-16 15:20:36 -070084#define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>"
85#define DRIVER_DESC "Cypress USB to Serial Driver"
86
87/* write buffer size defines */
88#define CYPRESS_BUF_SIZE 1024
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Németh Márton7d40d7e2010-01-10 15:34:24 +010090static const struct usb_device_id id_table_earthmate[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) },
Lonnie Mendez25b6f082005-05-10 17:09:52 -050092 { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) },
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 { } /* Terminating entry */
94};
95
Németh Márton7d40d7e2010-01-10 15:34:24 +010096static const struct usb_device_id id_table_cyphidcomrs232[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) },
Dmitry Shapin6f6f06e2008-03-04 15:25:10 -080098 { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) },
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 { } /* Terminating entry */
100};
101
Németh Márton7d40d7e2010-01-10 15:34:24 +0100102static const struct usb_device_id id_table_nokiaca42v2[] = {
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600103 { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) },
104 { } /* Terminating entry */
105};
106
Németh Márton7d40d7e2010-01-10 15:34:24 +0100107static const struct usb_device_id id_table_combined[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) },
Lonnie Mendez25b6f082005-05-10 17:09:52 -0500109 { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) },
Dmitry Shapin6f6f06e2008-03-04 15:25:10 -0800111 { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) },
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600112 { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 { } /* Terminating entry */
114};
115
Alan Cox813a2242008-07-22 11:10:36 +0100116MODULE_DEVICE_TABLE(usb, id_table_combined);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
118static struct usb_driver cypress_driver = {
119 .name = "cypress",
120 .probe = usb_serial_probe,
121 .disconnect = usb_serial_disconnect,
122 .id_table = id_table_combined,
Greg Kroah-Hartmanba9dc652005-11-16 13:41:28 -0800123 .no_dynamic_id = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124};
125
Mike Isely3416eaa2008-02-10 20:23:19 -0600126enum packet_format {
127 packet_format_1, /* b0:status, b1:payload count */
128 packet_format_2 /* b0[7:3]:status, b0[2:0]:payload count */
129};
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131struct cypress_private {
132 spinlock_t lock; /* private lock */
133 int chiptype; /* identifier of device, for quirks/etc */
134 int bytes_in; /* used for statistics */
135 int bytes_out; /* used for statistics */
136 int cmd_count; /* used for statistics */
137 int cmd_ctrl; /* always set this to 1 before issuing a command */
Johan Hovold117fb8d2010-05-16 20:33:50 +0200138 struct kfifo write_fifo; /* write fifo */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 int write_urb_in_use; /* write urb in use indicator */
Mike Isely0257fa92006-08-29 22:06:59 -0500140 int write_urb_interval; /* interval to use for write urb */
141 int read_urb_interval; /* interval to use for read urb */
Mike Isely78aef512006-08-29 22:07:11 -0500142 int comm_is_ok; /* true if communication is (still) ok */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 int termios_initialized;
144 __u8 line_control; /* holds dtr / rts value */
145 __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */
146 __u8 current_config; /* stores the current configuration byte */
147 __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */
Mike Isely3416eaa2008-02-10 20:23:19 -0600148 enum packet_format pkt_fmt; /* format to use for packet send / receive */
Mike Isely3d6aa322008-02-10 20:23:24 -0600149 int get_cfg_unsafe; /* If true, the CYPRESS_GET_CONFIG is unsafe */
Alan Cox813a2242008-07-22 11:10:36 +0100150 int baud_rate; /* stores current baud rate in
151 integer form */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 int isthrottled; /* if throttled, discard reads */
153 wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */
154 char prev_status, diff_status; /* used for TIOCMIWAIT */
Daniel Mack3ad2f3fb2010-02-03 08:01:28 +0800155 /* we pass a pointer to this as the argument sent to
Alan Cox813a2242008-07-22 11:10:36 +0100156 cypress_set_termios old_termios */
Alan Cox606d0992006-12-08 02:38:45 -0800157 struct ktermios tmp_termios; /* stores the old termios settings */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158};
159
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160/* function prototypes for the Cypress USB to serial device */
Alan Cox813a2242008-07-22 11:10:36 +0100161static int cypress_earthmate_startup(struct usb_serial *serial);
162static int cypress_hidcom_startup(struct usb_serial *serial);
163static int cypress_ca42v2_startup(struct usb_serial *serial);
Alan Sternf9c99bb2009-06-02 11:53:55 -0400164static void cypress_release(struct usb_serial *serial);
Alan Coxa509a7e2009-09-19 13:13:26 -0700165static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port);
Alan Cox335f8512009-06-11 12:26:29 +0100166static void cypress_close(struct usb_serial_port *port);
167static void cypress_dtr_rts(struct usb_serial_port *port, int on);
Alan Cox813a2242008-07-22 11:10:36 +0100168static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port,
169 const unsigned char *buf, int count);
170static void cypress_send(struct usb_serial_port *port);
171static int cypress_write_room(struct tty_struct *tty);
172static int cypress_ioctl(struct tty_struct *tty, struct file *file,
173 unsigned int cmd, unsigned long arg);
174static void cypress_set_termios(struct tty_struct *tty,
175 struct usb_serial_port *port, struct ktermios *old);
176static int cypress_tiocmget(struct tty_struct *tty, struct file *file);
177static int cypress_tiocmset(struct tty_struct *tty, struct file *file,
178 unsigned int set, unsigned int clear);
179static int cypress_chars_in_buffer(struct tty_struct *tty);
180static void cypress_throttle(struct tty_struct *tty);
181static void cypress_unthrottle(struct tty_struct *tty);
182static void cypress_set_dead(struct usb_serial_port *port);
183static void cypress_read_int_callback(struct urb *urb);
184static void cypress_write_int_callback(struct urb *urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
Greg Kroah-Hartmanea653702005-06-20 21:15:16 -0700186static struct usb_serial_driver cypress_earthmate_device = {
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700187 .driver = {
188 .owner = THIS_MODULE,
Greg Kroah-Hartman269bda12005-06-20 21:15:16 -0700189 .name = "earthmate",
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700190 },
Greg Kroah-Hartman269bda12005-06-20 21:15:16 -0700191 .description = "DeLorme Earthmate USB",
Johannes Hölzld9b1b782006-12-17 21:50:24 +0100192 .usb_driver = &cypress_driver,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 .id_table = id_table_earthmate,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 .num_ports = 1,
195 .attach = cypress_earthmate_startup,
Alan Sternf9c99bb2009-06-02 11:53:55 -0400196 .release = cypress_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 .open = cypress_open,
198 .close = cypress_close,
Alan Cox335f8512009-06-11 12:26:29 +0100199 .dtr_rts = cypress_dtr_rts,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 .write = cypress_write,
201 .write_room = cypress_write_room,
202 .ioctl = cypress_ioctl,
203 .set_termios = cypress_set_termios,
204 .tiocmget = cypress_tiocmget,
205 .tiocmset = cypress_tiocmset,
206 .chars_in_buffer = cypress_chars_in_buffer,
207 .throttle = cypress_throttle,
208 .unthrottle = cypress_unthrottle,
209 .read_int_callback = cypress_read_int_callback,
210 .write_int_callback = cypress_write_int_callback,
211};
212
Greg Kroah-Hartmanea653702005-06-20 21:15:16 -0700213static struct usb_serial_driver cypress_hidcom_device = {
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700214 .driver = {
215 .owner = THIS_MODULE,
Greg Kroah-Hartman269bda12005-06-20 21:15:16 -0700216 .name = "cyphidcom",
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700217 },
Greg Kroah-Hartman269bda12005-06-20 21:15:16 -0700218 .description = "HID->COM RS232 Adapter",
Johannes Hölzld9b1b782006-12-17 21:50:24 +0100219 .usb_driver = &cypress_driver,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 .id_table = id_table_cyphidcomrs232,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 .num_ports = 1,
222 .attach = cypress_hidcom_startup,
Alan Sternf9c99bb2009-06-02 11:53:55 -0400223 .release = cypress_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 .open = cypress_open,
225 .close = cypress_close,
Alan Cox335f8512009-06-11 12:26:29 +0100226 .dtr_rts = cypress_dtr_rts,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 .write = cypress_write,
228 .write_room = cypress_write_room,
229 .ioctl = cypress_ioctl,
230 .set_termios = cypress_set_termios,
231 .tiocmget = cypress_tiocmget,
232 .tiocmset = cypress_tiocmset,
233 .chars_in_buffer = cypress_chars_in_buffer,
234 .throttle = cypress_throttle,
235 .unthrottle = cypress_unthrottle,
236 .read_int_callback = cypress_read_int_callback,
237 .write_int_callback = cypress_write_int_callback,
238};
239
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600240static struct usb_serial_driver cypress_ca42v2_device = {
241 .driver = {
242 .owner = THIS_MODULE,
Alan Cox813a2242008-07-22 11:10:36 +0100243 .name = "nokiaca42v2",
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600244 },
245 .description = "Nokia CA-42 V2 Adapter",
Johannes Hölzld9b1b782006-12-17 21:50:24 +0100246 .usb_driver = &cypress_driver,
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600247 .id_table = id_table_nokiaca42v2,
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600248 .num_ports = 1,
249 .attach = cypress_ca42v2_startup,
Alan Sternf9c99bb2009-06-02 11:53:55 -0400250 .release = cypress_release,
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600251 .open = cypress_open,
252 .close = cypress_close,
Alan Cox335f8512009-06-11 12:26:29 +0100253 .dtr_rts = cypress_dtr_rts,
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600254 .write = cypress_write,
255 .write_room = cypress_write_room,
256 .ioctl = cypress_ioctl,
257 .set_termios = cypress_set_termios,
258 .tiocmget = cypress_tiocmget,
259 .tiocmset = cypress_tiocmset,
260 .chars_in_buffer = cypress_chars_in_buffer,
261 .throttle = cypress_throttle,
262 .unthrottle = cypress_unthrottle,
263 .read_int_callback = cypress_read_int_callback,
264 .write_int_callback = cypress_write_int_callback,
265};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
267/*****************************************************************************
268 * Cypress serial helper functions
269 *****************************************************************************/
270
271
Alan Cox8873aaa2008-03-10 21:59:28 +0000272static int analyze_baud_rate(struct usb_serial_port *port, speed_t new_rate)
Mike Isely92983c22008-02-10 20:23:32 -0600273{
Mike Isely92983c22008-02-10 20:23:32 -0600274 struct cypress_private *priv;
275 priv = usb_get_serial_port_data(port);
276
Mike Frysingerc3126592009-12-18 16:33:03 -0500277 if (unstable_bauds)
278 return new_rate;
279
Mike Isely92983c22008-02-10 20:23:32 -0600280 /*
281 * The general purpose firmware for the Cypress M8 allows for
282 * a maximum speed of 57600bps (I have no idea whether DeLorme
283 * chose to use the general purpose firmware or not), if you
284 * need to modify this speed setting for your own project
285 * please add your own chiptype and modify the code likewise.
286 * The Cypress HID->COM device will work successfully up to
287 * 115200bps (but the actual throughput is around 3kBps).
288 */
Mike Isely92983c22008-02-10 20:23:32 -0600289 if (port->serial->dev->speed == USB_SPEED_LOW) {
290 /*
291 * Mike Isely <isely@pobox.com> 2-Feb-2008: The
292 * Cypress app note that describes this mechanism
293 * states the the low-speed part can't handle more
294 * than 800 bytes/sec, in which case 4800 baud is the
295 * safest speed for a part like that.
296 */
297 if (new_rate > 4800) {
298 dbg("%s - failed setting baud rate, device incapable "
299 "speed %d", __func__, new_rate);
300 return -1;
301 }
302 }
303 switch (priv->chiptype) {
304 case CT_EARTHMATE:
305 if (new_rate <= 600) {
306 /* 300 and 600 baud rates are supported under
307 * the generic firmware, but are not used with
308 * NMEA and SiRF protocols */
309 dbg("%s - failed setting baud rate, unsupported speed "
310 "of %d on Earthmate GPS", __func__, new_rate);
311 return -1;
312 }
313 break;
314 default:
315 break;
316 }
317 return new_rate;
318}
319
320
Steven Cole093cf722005-05-03 19:07:24 -0600321/* This function can either set or retrieve the current serial line settings */
Alan Cox813a2242008-07-22 11:10:36 +0100322static int cypress_serial_control(struct tty_struct *tty,
Alan Cox95da3102008-07-22 11:09:07 +0100323 struct usb_serial_port *port, speed_t baud_rate, int data_bits,
324 int stop_bits, int parity_enable, int parity_type, int reset,
325 int cypress_request_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326{
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500327 int new_baudrate = 0, retval = 0, tries = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 struct cypress_private *priv;
Johan Hovold09546442009-12-28 23:01:48 +0100329 u8 *feature_buffer;
330 const unsigned int feature_len = 5;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 unsigned long flags;
332
Harvey Harrison441b62c2008-03-03 16:08:34 -0800333 dbg("%s", __func__);
Alan Cox813a2242008-07-22 11:10:36 +0100334
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 priv = usb_get_serial_port_data(port);
336
Mike Isely78aef512006-08-29 22:07:11 -0500337 if (!priv->comm_is_ok)
338 return -ENODEV;
339
Johan Hovold09546442009-12-28 23:01:48 +0100340 feature_buffer = kcalloc(feature_len, sizeof(u8), GFP_KERNEL);
341 if (!feature_buffer)
342 return -ENOMEM;
343
Alan Cox813a2242008-07-22 11:10:36 +0100344 switch (cypress_request_type) {
345 case CYPRESS_SET_CONFIG:
Alan Cox813a2242008-07-22 11:10:36 +0100346 /* 0 means 'Hang up' so doesn't change the true bit rate */
Mike Frysinger2805eb12009-12-18 16:33:02 -0500347 new_baudrate = priv->baud_rate;
348 if (baud_rate && baud_rate != priv->baud_rate) {
Alan Cox813a2242008-07-22 11:10:36 +0100349 dbg("%s - baud rate is changing", __func__);
350 retval = analyze_baud_rate(port, baud_rate);
Mike Frysinger2805eb12009-12-18 16:33:02 -0500351 if (retval >= 0) {
Alan Cox813a2242008-07-22 11:10:36 +0100352 new_baudrate = retval;
353 dbg("%s - New baud rate set to %d",
354 __func__, new_baudrate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 }
Alan Cox813a2242008-07-22 11:10:36 +0100356 }
357 dbg("%s - baud rate is being sent as %d",
358 __func__, new_baudrate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
Alan Cox813a2242008-07-22 11:10:36 +0100360 /* fill the feature_buffer with new configuration */
Johan Hovold0f2c2d72009-12-31 16:48:01 +0100361 put_unaligned_le32(new_baudrate, feature_buffer);
Alan Cox813a2242008-07-22 11:10:36 +0100362 feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */
363 /* 1 bit gap */
364 feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */
365 feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */
366 feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */
367 /* 1 bit gap */
368 feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
Alan Cox813a2242008-07-22 11:10:36 +0100370 dbg("%s - device is being sent this feature report:",
371 __func__);
372 dbg("%s - %02X - %02X - %02X - %02X - %02X", __func__,
373 feature_buffer[0], feature_buffer[1],
374 feature_buffer[2], feature_buffer[3],
375 feature_buffer[4]);
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500376
Alan Cox813a2242008-07-22 11:10:36 +0100377 do {
378 retval = usb_control_msg(port->serial->dev,
379 usb_sndctrlpipe(port->serial->dev, 0),
380 HID_REQ_SET_REPORT,
381 USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS,
382 0x0300, 0, feature_buffer,
Johan Hovold09546442009-12-28 23:01:48 +0100383 feature_len, 500);
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500384
Alan Cox813a2242008-07-22 11:10:36 +0100385 if (tries++ >= 3)
386 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Johan Hovold09546442009-12-28 23:01:48 +0100388 } while (retval != feature_len &&
Alan Cox813a2242008-07-22 11:10:36 +0100389 retval != -ENODEV);
Mike Isely93075542008-02-10 20:23:14 -0600390
Johan Hovold09546442009-12-28 23:01:48 +0100391 if (retval != feature_len) {
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700392 dev_err(&port->dev, "%s - failed sending serial "
393 "line settings - %d\n", __func__, retval);
Alan Cox813a2242008-07-22 11:10:36 +0100394 cypress_set_dead(port);
395 } else {
396 spin_lock_irqsave(&priv->lock, flags);
397 priv->baud_rate = new_baudrate;
398 priv->current_config = feature_buffer[4];
399 spin_unlock_irqrestore(&priv->lock, flags);
400 /* If we asked for a speed change encode it */
401 if (baud_rate)
402 tty_encode_baud_rate(tty,
403 new_baudrate, new_baudrate);
404 }
405 break;
406 case CYPRESS_GET_CONFIG:
407 if (priv->get_cfg_unsafe) {
408 /* Not implemented for this device,
409 and if we try to do it we're likely
410 to crash the hardware. */
Johan Hovold09546442009-12-28 23:01:48 +0100411 retval = -ENOTTY;
412 goto out;
Alan Cox813a2242008-07-22 11:10:36 +0100413 }
414 dbg("%s - retreiving serial line settings", __func__);
Alan Cox813a2242008-07-22 11:10:36 +0100415 do {
416 retval = usb_control_msg(port->serial->dev,
417 usb_rcvctrlpipe(port->serial->dev, 0),
418 HID_REQ_GET_REPORT,
419 USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS,
420 0x0300, 0, feature_buffer,
Johan Hovold09546442009-12-28 23:01:48 +0100421 feature_len, 500);
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500422
Alan Cox813a2242008-07-22 11:10:36 +0100423 if (tries++ >= 3)
424 break;
Johan Hovold09546442009-12-28 23:01:48 +0100425 } while (retval != feature_len
Alan Cox813a2242008-07-22 11:10:36 +0100426 && retval != -ENODEV);
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500427
Johan Hovold09546442009-12-28 23:01:48 +0100428 if (retval != feature_len) {
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700429 dev_err(&port->dev, "%s - failed to retrieve serial "
430 "line settings - %d\n", __func__, retval);
Alan Cox813a2242008-07-22 11:10:36 +0100431 cypress_set_dead(port);
Johan Hovold09546442009-12-28 23:01:48 +0100432 goto out;
Alan Cox813a2242008-07-22 11:10:36 +0100433 } else {
434 spin_lock_irqsave(&priv->lock, flags);
435 /* store the config in one byte, and later
436 use bit masks to check values */
437 priv->current_config = feature_buffer[4];
Johan Hovold0f2c2d72009-12-31 16:48:01 +0100438 priv->baud_rate = get_unaligned_le32(feature_buffer);
Alan Cox813a2242008-07-22 11:10:36 +0100439 spin_unlock_irqrestore(&priv->lock, flags);
440 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 }
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500442 spin_lock_irqsave(&priv->lock, flags);
443 ++priv->cmd_count;
444 spin_unlock_irqrestore(&priv->lock, flags);
Johan Hovold09546442009-12-28 23:01:48 +0100445out:
446 kfree(feature_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 return retval;
448} /* cypress_serial_control */
449
450
Mike Isely78aef512006-08-29 22:07:11 -0500451static void cypress_set_dead(struct usb_serial_port *port)
452{
453 struct cypress_private *priv = usb_get_serial_port_data(port);
454 unsigned long flags;
455
456 spin_lock_irqsave(&priv->lock, flags);
457 if (!priv->comm_is_ok) {
458 spin_unlock_irqrestore(&priv->lock, flags);
459 return;
460 }
461 priv->comm_is_ok = 0;
462 spin_unlock_irqrestore(&priv->lock, flags);
463
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700464 dev_err(&port->dev, "cypress_m8 suspending failing port %d - "
465 "interval might be too short\n", port->number);
Mike Isely78aef512006-08-29 22:07:11 -0500466}
467
468
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469/*****************************************************************************
470 * Cypress serial driver functions
471 *****************************************************************************/
472
473
Alan Cox813a2242008-07-22 11:10:36 +0100474static int generic_startup(struct usb_serial *serial)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475{
476 struct cypress_private *priv;
Mike Isely0257fa92006-08-29 22:06:59 -0500477 struct usb_serial_port *port = serial->port[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Harvey Harrison441b62c2008-03-03 16:08:34 -0800479 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
Alan Cox813a2242008-07-22 11:10:36 +0100481 priv = kzalloc(sizeof(struct cypress_private), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 if (!priv)
483 return -ENOMEM;
484
Mike Isely78aef512006-08-29 22:07:11 -0500485 priv->comm_is_ok = !0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 spin_lock_init(&priv->lock);
Johan Hovold117fb8d2010-05-16 20:33:50 +0200487 if (kfifo_alloc(&priv->write_fifo, CYPRESS_BUF_SIZE, GFP_KERNEL)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 kfree(priv);
489 return -ENOMEM;
490 }
491 init_waitqueue_head(&priv->delta_msr_wait);
Alan Cox813a2242008-07-22 11:10:36 +0100492
493 usb_reset_configuration(serial->dev);
494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 priv->cmd_ctrl = 0;
496 priv->line_control = 0;
497 priv->termios_initialized = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 priv->rx_flags = 0;
Mike Isely3416eaa2008-02-10 20:23:19 -0600499 /* Default packet format setting is determined by packet size.
500 Anything with a size larger then 9 must have a separate
501 count field since the 3 bit count field is otherwise too
502 small. Otherwise we can use the slightly more compact
503 format. This is in accordance with the cypress_m8 serial
504 converter app note. */
Alan Cox813a2242008-07-22 11:10:36 +0100505 if (port->interrupt_out_size > 9)
Mike Isely3416eaa2008-02-10 20:23:19 -0600506 priv->pkt_fmt = packet_format_1;
Alan Cox813a2242008-07-22 11:10:36 +0100507 else
Mike Isely3416eaa2008-02-10 20:23:19 -0600508 priv->pkt_fmt = packet_format_2;
Alan Cox813a2242008-07-22 11:10:36 +0100509
Mike Isely0257fa92006-08-29 22:06:59 -0500510 if (interval > 0) {
511 priv->write_urb_interval = interval;
512 priv->read_urb_interval = interval;
513 dbg("%s - port %d read & write intervals forced to %d",
Alan Cox813a2242008-07-22 11:10:36 +0100514 __func__, port->number, interval);
Mike Isely0257fa92006-08-29 22:06:59 -0500515 } else {
516 priv->write_urb_interval = port->interrupt_out_urb->interval;
517 priv->read_urb_interval = port->interrupt_in_urb->interval;
518 dbg("%s - port %d intervals: read=%d write=%d",
Alan Cox813a2242008-07-22 11:10:36 +0100519 __func__, port->number,
520 priv->read_urb_interval, priv->write_urb_interval);
Mike Isely0257fa92006-08-29 22:06:59 -0500521 }
522 usb_set_serial_port_data(port, priv);
Alan Cox813a2242008-07-22 11:10:36 +0100523
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500524 return 0;
525}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526
527
Alan Cox813a2242008-07-22 11:10:36 +0100528static int cypress_earthmate_startup(struct usb_serial *serial)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529{
530 struct cypress_private *priv;
Mike Isely3d6aa322008-02-10 20:23:24 -0600531 struct usb_serial_port *port = serial->port[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532
Harvey Harrison441b62c2008-03-03 16:08:34 -0800533 dbg("%s", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
535 if (generic_startup(serial)) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800536 dbg("%s - Failed setting up port %d", __func__,
Mike Isely3d6aa322008-02-10 20:23:24 -0600537 port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 return 1;
539 }
540
Mike Isely3d6aa322008-02-10 20:23:24 -0600541 priv = usb_get_serial_port_data(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 priv->chiptype = CT_EARTHMATE;
Mike Isely3416eaa2008-02-10 20:23:19 -0600543 /* All Earthmate devices use the separated-count packet
544 format! Idiotic. */
545 priv->pkt_fmt = packet_format_1;
Alan Cox813a2242008-07-22 11:10:36 +0100546 if (serial->dev->descriptor.idProduct !=
547 cpu_to_le16(PRODUCT_ID_EARTHMATEUSB)) {
Mike Isely3d6aa322008-02-10 20:23:24 -0600548 /* The old original USB Earthmate seemed able to
549 handle GET_CONFIG requests; everything they've
550 produced since that time crashes if this command is
551 attempted :-( */
552 dbg("%s - Marking this device as unsafe for GET_CONFIG "
553 "commands", __func__);
554 priv->get_cfg_unsafe = !0;
555 }
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500556
557 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558} /* cypress_earthmate_startup */
559
560
Alan Cox813a2242008-07-22 11:10:36 +0100561static int cypress_hidcom_startup(struct usb_serial *serial)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562{
563 struct cypress_private *priv;
564
Harvey Harrison441b62c2008-03-03 16:08:34 -0800565 dbg("%s", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
567 if (generic_startup(serial)) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800568 dbg("%s - Failed setting up port %d", __func__,
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500569 serial->port[0]->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 return 1;
571 }
572
573 priv = usb_get_serial_port_data(serial->port[0]);
574 priv->chiptype = CT_CYPHIDCOM;
Alan Cox813a2242008-07-22 11:10:36 +0100575
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500576 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577} /* cypress_hidcom_startup */
578
579
Alan Cox813a2242008-07-22 11:10:36 +0100580static int cypress_ca42v2_startup(struct usb_serial *serial)
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600581{
582 struct cypress_private *priv;
583
Harvey Harrison441b62c2008-03-03 16:08:34 -0800584 dbg("%s", __func__);
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600585
586 if (generic_startup(serial)) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800587 dbg("%s - Failed setting up port %d", __func__,
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600588 serial->port[0]->number);
589 return 1;
590 }
591
592 priv = usb_get_serial_port_data(serial->port[0]);
593 priv->chiptype = CT_CA42V2;
594
595 return 0;
596} /* cypress_ca42v2_startup */
597
598
Alan Sternf9c99bb2009-06-02 11:53:55 -0400599static void cypress_release(struct usb_serial *serial)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600{
601 struct cypress_private *priv;
602
Alan Cox813a2242008-07-22 11:10:36 +0100603 dbg("%s - port %d", __func__, serial->port[0]->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
605 /* all open ports are closed at this point */
606
607 priv = usb_get_serial_port_data(serial->port[0]);
608
609 if (priv) {
Johan Hovold117fb8d2010-05-16 20:33:50 +0200610 kfifo_free(&priv->write_fifo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 kfree(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 }
613}
614
615
Alan Coxa509a7e2009-09-19 13:13:26 -0700616static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617{
618 struct cypress_private *priv = usb_get_serial_port_data(port);
619 struct usb_serial *serial = port->serial;
620 unsigned long flags;
621 int result = 0;
622
Harvey Harrison441b62c2008-03-03 16:08:34 -0800623 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624
Mike Isely78aef512006-08-29 22:07:11 -0500625 if (!priv->comm_is_ok)
626 return -EIO;
627
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 /* clear halts before open */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 usb_clear_halt(serial->dev, 0x81);
630 usb_clear_halt(serial->dev, 0x02);
631
632 spin_lock_irqsave(&priv->lock, flags);
633 /* reset read/write statistics */
634 priv->bytes_in = 0;
635 priv->bytes_out = 0;
636 priv->cmd_count = 0;
637 priv->rx_flags = 0;
638 spin_unlock_irqrestore(&priv->lock, flags);
639
Alan Cox335f8512009-06-11 12:26:29 +0100640 /* Set termios */
Alan Coxfe1ae7f2009-09-19 13:13:33 -0700641 cypress_send(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642
Alan Cox95da3102008-07-22 11:09:07 +0100643 if (tty)
644 cypress_set_termios(tty, port, &priv->tmp_termios);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645
646 /* setup the port and start reading from the device */
Alan Cox813a2242008-07-22 11:10:36 +0100647 if (!port->interrupt_in_urb) {
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700648 dev_err(&port->dev, "%s - interrupt_in_urb is empty!\n",
649 __func__);
Alan Cox813a2242008-07-22 11:10:36 +0100650 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 }
652
653 usb_fill_int_urb(port->interrupt_in_urb, serial->dev,
654 usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress),
Alan Cox813a2242008-07-22 11:10:36 +0100655 port->interrupt_in_urb->transfer_buffer,
656 port->interrupt_in_urb->transfer_buffer_length,
Mike Isely0257fa92006-08-29 22:06:59 -0500657 cypress_read_int_callback, port, priv->read_urb_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
659
Alan Cox813a2242008-07-22 11:10:36 +0100660 if (result) {
661 dev_err(&port->dev,
662 "%s - failed submitting read urb, error %d\n",
663 __func__, result);
Mike Isely78aef512006-08-29 22:07:11 -0500664 cypress_set_dead(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 }
Alan Cox335f8512009-06-11 12:26:29 +0100666 port->port.drain_delay = 256;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 return result;
668} /* cypress_open */
669
Alan Cox335f8512009-06-11 12:26:29 +0100670static void cypress_dtr_rts(struct usb_serial_port *port, int on)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671{
672 struct cypress_private *priv = usb_get_serial_port_data(port);
Alan Cox335f8512009-06-11 12:26:29 +0100673 /* drop dtr and rts */
Alan Cox335f8512009-06-11 12:26:29 +0100674 spin_lock_irq(&priv->lock);
675 if (on == 0)
676 priv->line_control = 0;
677 else
678 priv->line_control = CONTROL_DTR | CONTROL_RTS;
679 priv->cmd_ctrl = 1;
680 spin_unlock_irq(&priv->lock);
681 cypress_write(NULL, port, NULL, 0);
682}
683
684static void cypress_close(struct usb_serial_port *port)
685{
686 struct cypress_private *priv = usb_get_serial_port_data(port);
Johan Hovold117fb8d2010-05-16 20:33:50 +0200687 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
Harvey Harrison441b62c2008-03-03 16:08:34 -0800689 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
Oliver Neukum9e3b1d82008-01-22 15:54:54 +0100691 /* writing is potentially harmful, lock must be taken */
692 mutex_lock(&port->serial->disc_mutex);
693 if (port->serial->disconnected) {
694 mutex_unlock(&port->serial->disc_mutex);
695 return;
696 }
Johan Hovold117fb8d2010-05-16 20:33:50 +0200697 spin_lock_irqsave(&priv->lock, flags);
698 kfifo_reset_out(&priv->write_fifo);
699 spin_unlock_irqrestore(&priv->lock, flags);
700
Harvey Harrison441b62c2008-03-03 16:08:34 -0800701 dbg("%s - stopping urbs", __func__);
Alan Cox813a2242008-07-22 11:10:36 +0100702 usb_kill_urb(port->interrupt_in_urb);
703 usb_kill_urb(port->interrupt_out_urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 if (stats)
Alan Cox813a2242008-07-22 11:10:36 +0100706 dev_info(&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n",
707 priv->bytes_in, priv->bytes_out, priv->cmd_count);
Oliver Neukum9e3b1d82008-01-22 15:54:54 +0100708 mutex_unlock(&port->serial->disc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709} /* cypress_close */
710
711
Alan Cox95da3102008-07-22 11:09:07 +0100712static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port,
713 const unsigned char *buf, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714{
715 struct cypress_private *priv = usb_get_serial_port_data(port);
Alan Cox813a2242008-07-22 11:10:36 +0100716
Harvey Harrison441b62c2008-03-03 16:08:34 -0800717 dbg("%s - port %d, %d bytes", __func__, port->number, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718
719 /* line control commands, which need to be executed immediately,
720 are not put into the buffer for obvious reasons.
721 */
722 if (priv->cmd_ctrl) {
723 count = 0;
724 goto finish;
725 }
Alan Cox813a2242008-07-22 11:10:36 +0100726
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 if (!count)
728 return count;
Alan Cox813a2242008-07-22 11:10:36 +0100729
Johan Hovold117fb8d2010-05-16 20:33:50 +0200730 count = kfifo_in_locked(&priv->write_fifo, buf, count, &priv->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731
732finish:
733 cypress_send(port);
734
735 return count;
736} /* cypress_write */
737
738
739static void cypress_send(struct usb_serial_port *port)
740{
741 int count = 0, result, offset, actual_size;
742 struct cypress_private *priv = usb_get_serial_port_data(port);
743 unsigned long flags;
Alan Cox813a2242008-07-22 11:10:36 +0100744
Mike Isely78aef512006-08-29 22:07:11 -0500745 if (!priv->comm_is_ok)
746 return;
747
Harvey Harrison441b62c2008-03-03 16:08:34 -0800748 dbg("%s - port %d", __func__, port->number);
Alan Cox813a2242008-07-22 11:10:36 +0100749 dbg("%s - interrupt out size is %d", __func__,
750 port->interrupt_out_size);
751
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 spin_lock_irqsave(&priv->lock, flags);
753 if (priv->write_urb_in_use) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800754 dbg("%s - can't write, urb in use", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 spin_unlock_irqrestore(&priv->lock, flags);
756 return;
757 }
758 spin_unlock_irqrestore(&priv->lock, flags);
759
760 /* clear buffer */
Alan Cox813a2242008-07-22 11:10:36 +0100761 memset(port->interrupt_out_urb->transfer_buffer, 0,
762 port->interrupt_out_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
764 spin_lock_irqsave(&priv->lock, flags);
Mike Isely3416eaa2008-02-10 20:23:19 -0600765 switch (priv->pkt_fmt) {
766 default:
767 case packet_format_1:
768 /* this is for the CY7C64013... */
769 offset = 2;
770 port->interrupt_out_buffer[0] = priv->line_control;
771 break;
772 case packet_format_2:
773 /* this is for the CY7C63743... */
774 offset = 1;
775 port->interrupt_out_buffer[0] = priv->line_control;
776 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 }
778
779 if (priv->line_control & CONTROL_RESET)
780 priv->line_control &= ~CONTROL_RESET;
781
782 if (priv->cmd_ctrl) {
783 priv->cmd_count++;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800784 dbg("%s - line control command being issued", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 spin_unlock_irqrestore(&priv->lock, flags);
786 goto send;
787 } else
788 spin_unlock_irqrestore(&priv->lock, flags);
789
Johan Hovold117fb8d2010-05-16 20:33:50 +0200790 count = kfifo_out_locked(&priv->write_fifo,
791 &port->interrupt_out_buffer[offset],
792 port->interrupt_out_size - offset,
793 &priv->lock);
Alan Cox813a2242008-07-22 11:10:36 +0100794 if (count == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
Mike Isely3416eaa2008-02-10 20:23:19 -0600797 switch (priv->pkt_fmt) {
798 default:
799 case packet_format_1:
800 port->interrupt_out_buffer[1] = count;
801 break;
802 case packet_format_2:
803 port->interrupt_out_buffer[0] |= count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 }
805
Harvey Harrison441b62c2008-03-03 16:08:34 -0800806 dbg("%s - count is %d", __func__, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807
808send:
809 spin_lock_irqsave(&priv->lock, flags);
810 priv->write_urb_in_use = 1;
811 spin_unlock_irqrestore(&priv->lock, flags);
812
813 if (priv->cmd_ctrl)
814 actual_size = 1;
815 else
Mike Isely3416eaa2008-02-10 20:23:19 -0600816 actual_size = count +
817 (priv->pkt_fmt == packet_format_1 ? 2 : 1);
818
Alan Cox813a2242008-07-22 11:10:36 +0100819 usb_serial_debug_data(debug, &port->dev, __func__,
820 port->interrupt_out_size,
821 port->interrupt_out_urb->transfer_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822
Mike Isely9aa8dae2006-08-29 22:07:04 -0500823 usb_fill_int_urb(port->interrupt_out_urb, port->serial->dev,
824 usb_sndintpipe(port->serial->dev, port->interrupt_out_endpointAddress),
825 port->interrupt_out_buffer, port->interrupt_out_size,
826 cypress_write_int_callback, port, priv->write_urb_interval);
Alan Cox813a2242008-07-22 11:10:36 +0100827 result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 if (result) {
Alan Cox813a2242008-07-22 11:10:36 +0100829 dev_err(&port->dev,
830 "%s - failed submitting write urb, error %d\n",
831 __func__, result);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 priv->write_urb_in_use = 0;
Mike Isely78aef512006-08-29 22:07:11 -0500833 cypress_set_dead(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 }
835
836 spin_lock_irqsave(&priv->lock, flags);
Alan Cox813a2242008-07-22 11:10:36 +0100837 if (priv->cmd_ctrl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 priv->cmd_ctrl = 0;
Alan Cox813a2242008-07-22 11:10:36 +0100839
840 /* do not count the line control and size bytes */
841 priv->bytes_out += count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 spin_unlock_irqrestore(&priv->lock, flags);
843
Pete Zaitcevcf2c7482006-05-22 21:58:49 -0700844 usb_serial_port_softint(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845} /* cypress_send */
846
847
848/* returns how much space is available in the soft buffer */
Alan Cox95da3102008-07-22 11:09:07 +0100849static int cypress_write_room(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850{
Alan Cox95da3102008-07-22 11:09:07 +0100851 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 struct cypress_private *priv = usb_get_serial_port_data(port);
853 int room = 0;
854 unsigned long flags;
855
Harvey Harrison441b62c2008-03-03 16:08:34 -0800856 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857
858 spin_lock_irqsave(&priv->lock, flags);
Johan Hovold117fb8d2010-05-16 20:33:50 +0200859 room = kfifo_avail(&priv->write_fifo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 spin_unlock_irqrestore(&priv->lock, flags);
861
Harvey Harrison441b62c2008-03-03 16:08:34 -0800862 dbg("%s - returns %d", __func__, room);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 return room;
864}
865
866
Alan Cox95da3102008-07-22 11:09:07 +0100867static int cypress_tiocmget(struct tty_struct *tty, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868{
Alan Cox95da3102008-07-22 11:09:07 +0100869 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 struct cypress_private *priv = usb_get_serial_port_data(port);
871 __u8 status, control;
872 unsigned int result = 0;
873 unsigned long flags;
Alan Cox813a2242008-07-22 11:10:36 +0100874
Harvey Harrison441b62c2008-03-03 16:08:34 -0800875 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876
877 spin_lock_irqsave(&priv->lock, flags);
878 control = priv->line_control;
879 status = priv->current_status;
880 spin_unlock_irqrestore(&priv->lock, flags);
881
882 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
883 | ((control & CONTROL_RTS) ? TIOCM_RTS : 0)
884 | ((status & UART_CTS) ? TIOCM_CTS : 0)
885 | ((status & UART_DSR) ? TIOCM_DSR : 0)
886 | ((status & UART_RI) ? TIOCM_RI : 0)
887 | ((status & UART_CD) ? TIOCM_CD : 0);
888
Harvey Harrison441b62c2008-03-03 16:08:34 -0800889 dbg("%s - result = %x", __func__, result);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890
891 return result;
892}
893
894
Alan Cox95da3102008-07-22 11:09:07 +0100895static int cypress_tiocmset(struct tty_struct *tty, struct file *file,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 unsigned int set, unsigned int clear)
897{
Alan Cox95da3102008-07-22 11:09:07 +0100898 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 struct cypress_private *priv = usb_get_serial_port_data(port);
900 unsigned long flags;
Alan Cox813a2242008-07-22 11:10:36 +0100901
Harvey Harrison441b62c2008-03-03 16:08:34 -0800902 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903
904 spin_lock_irqsave(&priv->lock, flags);
905 if (set & TIOCM_RTS)
906 priv->line_control |= CONTROL_RTS;
907 if (set & TIOCM_DTR)
908 priv->line_control |= CONTROL_DTR;
909 if (clear & TIOCM_RTS)
910 priv->line_control &= ~CONTROL_RTS;
911 if (clear & TIOCM_DTR)
912 priv->line_control &= ~CONTROL_DTR;
Alan Cox8873aaa2008-03-10 21:59:28 +0000913 priv->cmd_ctrl = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 spin_unlock_irqrestore(&priv->lock, flags);
915
Alan Cox95da3102008-07-22 11:09:07 +0100916 return cypress_write(tty, port, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917}
918
919
Alan Cox813a2242008-07-22 11:10:36 +0100920static int cypress_ioctl(struct tty_struct *tty, struct file *file,
Alan Cox95da3102008-07-22 11:09:07 +0100921 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922{
Alan Cox95da3102008-07-22 11:09:07 +0100923 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 struct cypress_private *priv = usb_get_serial_port_data(port);
925
Harvey Harrison441b62c2008-03-03 16:08:34 -0800926 dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927
928 switch (cmd) {
Alan Cox813a2242008-07-22 11:10:36 +0100929 /* This code comes from drivers/char/serial.c and ftdi_sio.c */
930 case TIOCMIWAIT:
931 while (priv != NULL) {
932 interruptible_sleep_on(&priv->delta_msr_wait);
933 /* see if a signal did it */
934 if (signal_pending(current))
935 return -ERESTARTSYS;
936 else {
937 char diff = priv->diff_status;
938 if (diff == 0)
939 return -EIO; /* no change => error */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940
Alan Cox813a2242008-07-22 11:10:36 +0100941 /* consume all events */
942 priv->diff_status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
Alan Cox813a2242008-07-22 11:10:36 +0100944 /* return 0 if caller wanted to know about
945 these bits */
946 if (((arg & TIOCM_RNG) && (diff & UART_RI)) ||
947 ((arg & TIOCM_DSR) && (diff & UART_DSR)) ||
948 ((arg & TIOCM_CD) && (diff & UART_CD)) ||
949 ((arg & TIOCM_CTS) && (diff & UART_CTS)))
950 return 0;
951 /* otherwise caller can't care less about what
952 * happened, and so we continue to wait for
953 * more events.
954 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 }
Alan Cox813a2242008-07-22 11:10:36 +0100956 }
957 return 0;
958 default:
959 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 }
Harvey Harrison441b62c2008-03-03 16:08:34 -0800961 dbg("%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h", __func__, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 return -ENOIOCTLCMD;
963} /* cypress_ioctl */
964
965
Alan Cox95da3102008-07-22 11:09:07 +0100966static void cypress_set_termios(struct tty_struct *tty,
967 struct usb_serial_port *port, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968{
969 struct cypress_private *priv = usb_get_serial_port_data(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 int data_bits, stop_bits, parity_type, parity_enable;
Alan Cox8873aaa2008-03-10 21:59:28 +0000971 unsigned cflag, iflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 unsigned long flags;
973 __u8 oldlines;
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500974 int linechange = 0;
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500975
Harvey Harrison441b62c2008-03-03 16:08:34 -0800976 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 spin_lock_irqsave(&priv->lock, flags);
Alan Coxfe1ae7f2009-09-19 13:13:33 -0700979 /* We can't clean this one up as we don't know the device type
980 early enough */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 if (!priv->termios_initialized) {
982 if (priv->chiptype == CT_EARTHMATE) {
983 *(tty->termios) = tty_std_termios;
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500984 tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL |
985 CLOCAL;
Alan Cox8873aaa2008-03-10 21:59:28 +0000986 tty->termios->c_ispeed = 4800;
987 tty->termios->c_ospeed = 4800;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 } else if (priv->chiptype == CT_CYPHIDCOM) {
989 *(tty->termios) = tty_std_termios;
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500990 tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL |
991 CLOCAL;
Alan Cox8873aaa2008-03-10 21:59:28 +0000992 tty->termios->c_ispeed = 9600;
993 tty->termios->c_ospeed = 9600;
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600994 } else if (priv->chiptype == CT_CA42V2) {
995 *(tty->termios) = tty_std_termios;
996 tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL |
997 CLOCAL;
Alan Cox8873aaa2008-03-10 21:59:28 +0000998 tty->termios->c_ispeed = 9600;
999 tty->termios->c_ospeed = 9600;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 }
1001 priv->termios_initialized = 1;
1002 }
1003 spin_unlock_irqrestore(&priv->lock, flags);
1004
Alan Cox8873aaa2008-03-10 21:59:28 +00001005 /* Unsupported features need clearing */
1006 tty->termios->c_cflag &= ~(CMSPAR|CRTSCTS);
1007
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 cflag = tty->termios->c_cflag;
1009 iflag = tty->termios->c_iflag;
1010
1011 /* check if there are new settings */
1012 if (old_termios) {
Alan Cox8873aaa2008-03-10 21:59:28 +00001013 spin_lock_irqsave(&priv->lock, flags);
1014 priv->tmp_termios = *(tty->termios);
1015 spin_unlock_irqrestore(&priv->lock, flags);
1016 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017
1018 /* set number of data bits, parity, stop bits */
1019 /* when parity is disabled the parity type bit is ignored */
1020
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001021 /* 1 means 2 stop bits, 0 means 1 stop bit */
1022 stop_bits = cflag & CSTOPB ? 1 : 0;
1023
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 if (cflag & PARENB) {
1025 parity_enable = 1;
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001026 /* 1 means odd parity, 0 means even parity */
1027 parity_type = cflag & PARODD ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 } else
1029 parity_enable = parity_type = 0;
1030
Alan Cox77336822008-07-22 11:10:53 +01001031 switch (cflag & CSIZE) {
1032 case CS5:
1033 data_bits = 0;
1034 break;
1035 case CS6:
1036 data_bits = 1;
1037 break;
1038 case CS7:
1039 data_bits = 2;
1040 break;
1041 case CS8:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 data_bits = 3;
Alan Cox77336822008-07-22 11:10:53 +01001043 break;
1044 default:
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -07001045 dev_err(&port->dev, "%s - CSIZE was set, but not CS5-CS8\n",
1046 __func__);
Alan Cox77336822008-07-22 11:10:53 +01001047 data_bits = 3;
1048 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 spin_lock_irqsave(&priv->lock, flags);
1050 oldlines = priv->line_control;
1051 if ((cflag & CBAUD) == B0) {
1052 /* drop dtr and rts */
Harvey Harrison441b62c2008-03-03 16:08:34 -08001053 dbg("%s - dropping the lines, baud rate 0bps", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
Alan Cox8873aaa2008-03-10 21:59:28 +00001055 } else
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -05001056 priv->line_control = (CONTROL_DTR | CONTROL_RTS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001059 dbg("%s - sending %d stop_bits, %d parity_enable, %d parity_type, "
Harvey Harrison441b62c2008-03-03 16:08:34 -08001060 "%d data_bits (+5)", __func__, stop_bits,
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001061 parity_enable, parity_type, data_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062
Alan Cox813a2242008-07-22 11:10:36 +01001063 cypress_serial_control(tty, port, tty_get_baud_rate(tty),
1064 data_bits, stop_bits,
1065 parity_enable, parity_type,
1066 0, CYPRESS_SET_CONFIG);
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001067
1068 /* we perform a CYPRESS_GET_CONFIG so that the current settings are
1069 * filled into the private structure this should confirm that all is
1070 * working if it returns what we just set */
Alan Cox95da3102008-07-22 11:09:07 +01001071 cypress_serial_control(tty, port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001073 /* Here we can define custom tty settings for devices; the main tty
1074 * termios flag base comes from empeg.c */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001076 spin_lock_irqsave(&priv->lock, flags);
Alan Cox813a2242008-07-22 11:10:36 +01001077 if (priv->chiptype == CT_EARTHMATE && priv->baud_rate == 4800) {
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001078 dbg("Using custom termios settings for a baud rate of "
1079 "4800bps.");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 /* define custom termios settings for NMEA protocol */
1081
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 tty->termios->c_iflag /* input modes - */
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001083 &= ~(IGNBRK /* disable ignore break */
1084 | BRKINT /* disable break causes interrupt */
1085 | PARMRK /* disable mark parity errors */
1086 | ISTRIP /* disable clear high bit of input char */
1087 | INLCR /* disable translate NL to CR */
1088 | IGNCR /* disable ignore CR */
1089 | ICRNL /* disable translate CR to NL */
1090 | IXON); /* disable enable XON/XOFF flow control */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001092 tty->termios->c_oflag /* output modes */
1093 &= ~OPOST; /* disable postprocess output char */
1094
1095 tty->termios->c_lflag /* line discipline modes */
1096 &= ~(ECHO /* disable echo input characters */
1097 | ECHONL /* disable echo new line */
1098 | ICANON /* disable erase, kill, werase, and rprnt
1099 special characters */
1100 | ISIG /* disable interrupt, quit, and suspend
1101 special characters */
1102 | IEXTEN); /* disable non-POSIX special characters */
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -05001103 } /* CT_CYPHIDCOM: Application should handle this for device */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 linechange = (priv->line_control != oldlines);
1106 spin_unlock_irqrestore(&priv->lock, flags);
1107
1108 /* if necessary, set lines */
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -05001109 if (linechange) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 priv->cmd_ctrl = 1;
Alan Cox95da3102008-07-22 11:09:07 +01001111 cypress_write(tty, port, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113} /* cypress_set_termios */
1114
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001115
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116/* returns amount of data still left in soft buffer */
Alan Cox95da3102008-07-22 11:09:07 +01001117static int cypress_chars_in_buffer(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118{
Alan Cox95da3102008-07-22 11:09:07 +01001119 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 struct cypress_private *priv = usb_get_serial_port_data(port);
1121 int chars = 0;
1122 unsigned long flags;
1123
Harvey Harrison441b62c2008-03-03 16:08:34 -08001124 dbg("%s - port %d", __func__, port->number);
Alan Cox813a2242008-07-22 11:10:36 +01001125
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 spin_lock_irqsave(&priv->lock, flags);
Johan Hovold117fb8d2010-05-16 20:33:50 +02001127 chars = kfifo_len(&priv->write_fifo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 spin_unlock_irqrestore(&priv->lock, flags);
1129
Harvey Harrison441b62c2008-03-03 16:08:34 -08001130 dbg("%s - returns %d", __func__, chars);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 return chars;
1132}
1133
1134
Alan Cox95da3102008-07-22 11:09:07 +01001135static void cypress_throttle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136{
Alan Cox95da3102008-07-22 11:09:07 +01001137 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 struct cypress_private *priv = usb_get_serial_port_data(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139
Harvey Harrison441b62c2008-03-03 16:08:34 -08001140 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141
Oliver Neukum63832512009-10-07 10:50:23 +02001142 spin_lock_irq(&priv->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 priv->rx_flags = THROTTLED;
Oliver Neukum63832512009-10-07 10:50:23 +02001144 spin_unlock_irq(&priv->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145}
1146
1147
Alan Cox95da3102008-07-22 11:09:07 +01001148static void cypress_unthrottle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149{
Alan Cox95da3102008-07-22 11:09:07 +01001150 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 struct cypress_private *priv = usb_get_serial_port_data(port);
1152 int actually_throttled, result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153
Harvey Harrison441b62c2008-03-03 16:08:34 -08001154 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155
Oliver Neukum63832512009-10-07 10:50:23 +02001156 spin_lock_irq(&priv->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED;
1158 priv->rx_flags = 0;
Oliver Neukum63832512009-10-07 10:50:23 +02001159 spin_unlock_irq(&priv->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160
Mike Isely78aef512006-08-29 22:07:11 -05001161 if (!priv->comm_is_ok)
1162 return;
1163
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 if (actually_throttled) {
1165 port->interrupt_in_urb->dev = port->serial->dev;
1166
Oliver Neukum63832512009-10-07 10:50:23 +02001167 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
Mike Isely78aef512006-08-29 22:07:11 -05001168 if (result) {
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001169 dev_err(&port->dev, "%s - failed submitting read urb, "
Harvey Harrison441b62c2008-03-03 16:08:34 -08001170 "error %d\n", __func__, result);
Mike Isely78aef512006-08-29 22:07:11 -05001171 cypress_set_dead(port);
1172 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 }
1174}
1175
1176
David Howells7d12e782006-10-05 14:55:46 +01001177static void cypress_read_int_callback(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178{
Ming Leicdc97792008-02-24 18:41:47 +08001179 struct usb_serial_port *port = urb->context;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 struct cypress_private *priv = usb_get_serial_port_data(port);
1181 struct tty_struct *tty;
1182 unsigned char *data = urb->transfer_buffer;
1183 unsigned long flags;
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001184 char tty_flag = TTY_NORMAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185 int havedata = 0;
1186 int bytes = 0;
1187 int result;
1188 int i = 0;
Greg Kroah-Hartman8d7bc552007-06-15 15:44:13 -07001189 int status = urb->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190
Harvey Harrison441b62c2008-03-03 16:08:34 -08001191 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192
Greg Kroah-Hartman8d7bc552007-06-15 15:44:13 -07001193 switch (status) {
Mike Isely78aef512006-08-29 22:07:11 -05001194 case 0: /* success */
1195 break;
1196 case -ECONNRESET:
1197 case -ENOENT:
1198 case -ESHUTDOWN:
1199 /* precursor to disconnect so just go away */
1200 return;
1201 case -EPIPE:
Alan Stern4d2fae82009-07-09 12:59:57 -04001202 /* Can't call usb_clear_halt while in_interrupt */
1203 /* FALLS THROUGH */
Mike Isely78aef512006-08-29 22:07:11 -05001204 default:
1205 /* something ugly is going on... */
Alan Cox813a2242008-07-22 11:10:36 +01001206 dev_err(&urb->dev->dev,
1207 "%s - unexpected nonzero read status received: %d\n",
1208 __func__, status);
Mike Isely78aef512006-08-29 22:07:11 -05001209 cypress_set_dead(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 return;
1211 }
1212
1213 spin_lock_irqsave(&priv->lock, flags);
1214 if (priv->rx_flags & THROTTLED) {
Harvey Harrison441b62c2008-03-03 16:08:34 -08001215 dbg("%s - now throttling", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 priv->rx_flags |= ACTUALLY_THROTTLED;
1217 spin_unlock_irqrestore(&priv->lock, flags);
1218 return;
1219 }
1220 spin_unlock_irqrestore(&priv->lock, flags);
1221
Alan Cox4a90f092008-10-13 10:39:46 +01001222 tty = tty_port_tty_get(&port->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 if (!tty) {
Harvey Harrison441b62c2008-03-03 16:08:34 -08001224 dbg("%s - bad tty pointer - exiting", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225 return;
1226 }
1227
1228 spin_lock_irqsave(&priv->lock, flags);
Mike Isely3416eaa2008-02-10 20:23:19 -06001229 result = urb->actual_length;
1230 switch (priv->pkt_fmt) {
1231 default:
1232 case packet_format_1:
1233 /* This is for the CY7C64013... */
1234 priv->current_status = data[0] & 0xF8;
1235 bytes = data[1] + 2;
1236 i = 2;
1237 if (bytes > 2)
1238 havedata = 1;
1239 break;
1240 case packet_format_2:
1241 /* This is for the CY7C63743... */
1242 priv->current_status = data[0] & 0xF8;
1243 bytes = (data[0] & 0x07) + 1;
1244 i = 1;
1245 if (bytes > 1)
1246 havedata = 1;
1247 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248 }
1249 spin_unlock_irqrestore(&priv->lock, flags);
Mike Isely3416eaa2008-02-10 20:23:19 -06001250 if (result < bytes) {
1251 dbg("%s - wrong packet size - received %d bytes but packet "
1252 "said %d bytes", __func__, result, bytes);
1253 goto continue_read;
1254 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255
Alan Cox813a2242008-07-22 11:10:36 +01001256 usb_serial_debug_data(debug, &port->dev, __func__,
1257 urb->actual_length, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
1259 spin_lock_irqsave(&priv->lock, flags);
1260 /* check to see if status has changed */
Mike Isely67683062008-02-10 20:23:28 -06001261 if (priv->current_status != priv->prev_status) {
1262 priv->diff_status |= priv->current_status ^
1263 priv->prev_status;
1264 wake_up_interruptible(&priv->delta_msr_wait);
1265 priv->prev_status = priv->current_status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 }
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001267 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001269 /* hangup, as defined in acm.c... this might be a bad place for it
1270 * though */
1271 if (tty && !(tty->termios->c_cflag & CLOCAL) &&
1272 !(priv->current_status & UART_CD)) {
Harvey Harrison441b62c2008-03-03 16:08:34 -08001273 dbg("%s - calling hangup", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 tty_hangup(tty);
1275 goto continue_read;
1276 }
1277
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001278 /* There is one error bit... I'm assuming it is a parity error
1279 * indicator as the generic firmware will set this bit to 1 if a
1280 * parity error occurs.
1281 * I can not find reference to any other error events. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 spin_lock_irqsave(&priv->lock, flags);
1283 if (priv->current_status & CYP_ERROR) {
1284 spin_unlock_irqrestore(&priv->lock, flags);
1285 tty_flag = TTY_PARITY;
Harvey Harrison441b62c2008-03-03 16:08:34 -08001286 dbg("%s - Parity Error detected", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287 } else
1288 spin_unlock_irqrestore(&priv->lock, flags);
1289
1290 /* process read if there is data other than line status */
Alan Coxa108bfc2010-02-18 16:44:01 +00001291 if (tty && bytes > i) {
1292 tty_insert_flip_string_fixed_flag(tty, data + i,
Johan Hovold70ced222010-05-07 19:46:56 +02001293 tty_flag, bytes - i);
Alan Cox4a90f092008-10-13 10:39:46 +01001294 tty_flip_buffer_push(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 }
1296
1297 spin_lock_irqsave(&priv->lock, flags);
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001298 /* control and status byte(s) are also counted */
1299 priv->bytes_in += bytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 spin_unlock_irqrestore(&priv->lock, flags);
1301
1302continue_read:
Alan Cox4a90f092008-10-13 10:39:46 +01001303 tty_kref_put(tty);
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001304
Alan Stern1f871582010-02-17 10:05:47 -05001305 /* Continue trying to always read */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306
Alan Stern1f871582010-02-17 10:05:47 -05001307 if (priv->comm_is_ok) {
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001308 usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev,
1309 usb_rcvintpipe(port->serial->dev,
1310 port->interrupt_in_endpointAddress),
1311 port->interrupt_in_urb->transfer_buffer,
1312 port->interrupt_in_urb->transfer_buffer_length,
Alan Cox813a2242008-07-22 11:10:36 +01001313 cypress_read_int_callback, port,
1314 priv->read_urb_interval);
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001315 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
Alan Stern1f871582010-02-17 10:05:47 -05001316 if (result && result != -EPERM) {
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001317 dev_err(&urb->dev->dev, "%s - failed resubmitting "
Harvey Harrison441b62c2008-03-03 16:08:34 -08001318 "read urb, error %d\n", __func__,
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001319 result);
Mike Isely78aef512006-08-29 22:07:11 -05001320 cypress_set_dead(port);
1321 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 }
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001323
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324 return;
1325} /* cypress_read_int_callback */
1326
1327
David Howells7d12e782006-10-05 14:55:46 +01001328static void cypress_write_int_callback(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329{
Ming Leicdc97792008-02-24 18:41:47 +08001330 struct usb_serial_port *port = urb->context;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 struct cypress_private *priv = usb_get_serial_port_data(port);
1332 int result;
Greg Kroah-Hartman8d7bc552007-06-15 15:44:13 -07001333 int status = urb->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334
Harvey Harrison441b62c2008-03-03 16:08:34 -08001335 dbg("%s - port %d", __func__, port->number);
Greg Kroah-Hartman8d7bc552007-06-15 15:44:13 -07001336
1337 switch (status) {
Alan Cox813a2242008-07-22 11:10:36 +01001338 case 0:
1339 /* success */
1340 break;
1341 case -ECONNRESET:
1342 case -ENOENT:
1343 case -ESHUTDOWN:
1344 /* this urb is terminated, clean up */
1345 dbg("%s - urb shutting down with status: %d",
1346 __func__, status);
1347 priv->write_urb_in_use = 0;
1348 return;
1349 case -EPIPE: /* no break needed; clear halt and resubmit */
1350 if (!priv->comm_is_ok)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351 break;
Alan Cox813a2242008-07-22 11:10:36 +01001352 usb_clear_halt(port->serial->dev, 0x02);
1353 /* error in the urb, so we have to resubmit it */
1354 dbg("%s - nonzero write bulk status received: %d",
1355 __func__, status);
1356 port->interrupt_out_urb->transfer_buffer_length = 1;
1357 port->interrupt_out_urb->dev = port->serial->dev;
1358 result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC);
1359 if (!result)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 return;
Alan Cox813a2242008-07-22 11:10:36 +01001361 dev_err(&urb->dev->dev,
1362 "%s - failed resubmitting write urb, error %d\n",
1363 __func__, result);
1364 cypress_set_dead(port);
1365 break;
1366 default:
1367 dev_err(&urb->dev->dev,
1368 "%s - unexpected nonzero write status received: %d\n",
1369 __func__, status);
1370 cypress_set_dead(port);
1371 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 priv->write_urb_in_use = 0;
Alan Cox813a2242008-07-22 11:10:36 +01001374
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375 /* send any buffered data */
1376 cypress_send(port);
1377}
1378
1379
1380/*****************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381 * Module functions
1382 *****************************************************************************/
1383
1384static int __init cypress_init(void)
1385{
1386 int retval;
Alan Cox813a2242008-07-22 11:10:36 +01001387
Harvey Harrison441b62c2008-03-03 16:08:34 -08001388 dbg("%s", __func__);
Alan Cox813a2242008-07-22 11:10:36 +01001389
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 retval = usb_serial_register(&cypress_earthmate_device);
1391 if (retval)
1392 goto failed_em_register;
1393 retval = usb_serial_register(&cypress_hidcom_device);
1394 if (retval)
1395 goto failed_hidcom_register;
Lonnie Mendeza5c44e22006-03-01 10:45:24 -06001396 retval = usb_serial_register(&cypress_ca42v2_device);
1397 if (retval)
1398 goto failed_ca42v2_register;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399 retval = usb_register(&cypress_driver);
1400 if (retval)
1401 goto failed_usb_register;
1402
Greg Kroah-Hartmanc197a8d2008-08-18 13:21:04 -07001403 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1404 DRIVER_DESC "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406
Mariusz Kozlowski2e46b742006-11-17 17:49:22 +01001407failed_usb_register:
1408 usb_serial_deregister(&cypress_ca42v2_device);
1409failed_ca42v2_register:
1410 usb_serial_deregister(&cypress_hidcom_device);
1411failed_hidcom_register:
1412 usb_serial_deregister(&cypress_earthmate_device);
1413failed_em_register:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414 return retval;
1415}
1416
1417
Alan Cox813a2242008-07-22 11:10:36 +01001418static void __exit cypress_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419{
Harvey Harrison441b62c2008-03-03 16:08:34 -08001420 dbg("%s", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421
Alan Cox813a2242008-07-22 11:10:36 +01001422 usb_deregister(&cypress_driver);
1423 usb_serial_deregister(&cypress_earthmate_device);
1424 usb_serial_deregister(&cypress_hidcom_device);
1425 usb_serial_deregister(&cypress_ca42v2_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426}
1427
1428
1429module_init(cypress_init);
1430module_exit(cypress_exit);
1431
Alan Cox813a2242008-07-22 11:10:36 +01001432MODULE_AUTHOR(DRIVER_AUTHOR);
1433MODULE_DESCRIPTION(DRIVER_DESC);
1434MODULE_VERSION(DRIVER_VERSION);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435MODULE_LICENSE("GPL");
1436
1437module_param(debug, bool, S_IRUGO | S_IWUSR);
1438MODULE_PARM_DESC(debug, "Debug enabled or not");
1439module_param(stats, bool, S_IRUGO | S_IWUSR);
1440MODULE_PARM_DESC(stats, "Enable statistics or not");
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -05001441module_param(interval, int, S_IRUGO | S_IWUSR);
1442MODULE_PARM_DESC(interval, "Overrides interrupt interval");
Mike Frysingerc3126592009-12-18 16:33:03 -05001443module_param(unstable_bauds, bool, S_IRUGO | S_IWUSR);
1444MODULE_PARM_DESC(unstable_bauds, "Allow unstable baud rates");