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USB: tty: Prune uses of tty_request_room in the USB layer
[deliverable/linux.git] / drivers / usb / serial / visor.c
CommitLineData
1da177e4
LT		 1/*
2 * USB HandSpring Visor, Palm m50x, and Sony Clie driver
3 * (supports all of the Palm OS USB devices)
4 *
5 * Copyright (C) 1999 - 2004
6 * Greg Kroah-Hartman (greg@kroah.com)
7 *
4d0dce3e
GKH		 8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License version
10 * 2 as published by the Free Software Foundation.
1da177e4 11 *
d60d4396
AC		 12 * See Documentation/usb/usb-serial.txt for more information on using this
13 * driver
1da177e4 14 *
1da177e4
LT		 15 */
16
1da177e4
LT		 17#include <linux/kernel.h>
18#include <linux/errno.h>
19#include <linux/init.h>
20#include <linux/slab.h>
21#include <linux/tty.h>
22#include <linux/tty_driver.h>
23#include <linux/tty_flip.h>
24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/spinlock.h>
d60d4396 27#include <linux/uaccess.h>
1da177e4 28#include <linux/usb.h>
a969888c 29#include <linux/usb/serial.h>
1da177e4
LT		 30#include "visor.h"
31
32/*
33 * Version Information
34 */
1da177e4
LT		 35#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>"
36#define DRIVER_DESC "USB HandSpring Visor / Palm OS driver"
37
38/* function prototypes for a handspring visor */
a509a7e4 39static int visor_open(struct tty_struct *tty, struct usb_serial_port *port);
335f8514 40static void visor_close(struct usb_serial_port *port);
d60d4396
AC		 41static int visor_write(struct tty_struct *tty, struct usb_serial_port *port,
42 const unsigned char *buf, int count);
43static int visor_write_room(struct tty_struct *tty);
44static void visor_throttle(struct tty_struct *tty);
45static void visor_unthrottle(struct tty_struct *tty);
46static int visor_probe(struct usb_serial *serial,
47 const struct usb_device_id *id);
1da177e4 48static int visor_calc_num_ports(struct usb_serial *serial);
f9c99bb8 49static void visor_release(struct usb_serial *serial);
d60d4396
AC		 50static void visor_write_bulk_callback(struct urb *urb);
51static void visor_read_bulk_callback(struct urb *urb);
52static void visor_read_int_callback(struct urb *urb);
53static int clie_3_5_startup(struct usb_serial *serial);
54static int treo_attach(struct usb_serial *serial);
55static int clie_5_attach(struct usb_serial *serial);
56static int palm_os_3_probe(struct usb_serial *serial,
57 const struct usb_device_id *id);
58static int palm_os_4_probe(struct usb_serial *serial,
59 const struct usb_device_id *id);
1da177e4
LT		 60
61/* Parameters that may be passed into the module. */
62static int debug;
63static __u16 vendor;
64static __u16 product;
65
66static struct usb_device_id id_table [] = {
67 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID),
68 .driver_info = (kernel_ulong_t)&palm_os_3_probe },
69 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID),
70 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
71 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID),
72 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
04d52461
HS		 73 { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID),
74 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
1da177e4
LT		 75 { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID),
76 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
77 { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID),
78 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
79 { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID),
80 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
81 { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID),
82 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
83 { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID),
84 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
85 { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID),
86 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
87 { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID),
88 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
89 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID),
90 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
ac21e9ff 91 { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650),
92 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
1da177e4
LT		 93 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID),
94 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
1da177e4
LT		 95 { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID),
96 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
97 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID),
98 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
99 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID),
100 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
101 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID),
102 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
103 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID),
104 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
105 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID),
106 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
107 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID),
108 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
c8ba84a0
MA		 109 { USB_DEVICE(ACER_VENDOR_ID, ACER_S10_ID),
110 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
d60d4396 111 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID),
1da177e4 112 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
d60d4396 113 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID),
1da177e4 114 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
115c1ce5
LB		 115 { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID),
116 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
d60d4396 117 { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID),
1da177e4
LT		 118 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
119 { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID),
120 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
121 { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID),
122 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
123 { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID),
124 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
125 { }, /* optional parameter entry */
126 { } /* Terminating entry */
127};
128
129static struct usb_device_id clie_id_5_table [] = {
130 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID),
131 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
132 { }, /* optional parameter entry */
133 { } /* Terminating entry */
134};
135
136static struct usb_device_id clie_id_3_5_table [] = {
137 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
138 { } /* Terminating entry */
139};
140
141static struct usb_device_id id_table_combined [] = {
142 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID) },
143 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID) },
144 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID) },
04d52461 145 { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID) },
1da177e4
LT		 146 { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID) },
147 { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID) },
148 { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID) },
149 { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID) },
150 { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID) },
151 { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID) },
152 { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID) },
153 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID) },
ac21e9ff 154 { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650) },
1da177e4 155 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID) },
1da177e4
LT		 156 { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID) },
157 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
158 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID) },
159 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID) },
160 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID) },
161 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID) },
162 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID) },
163 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID) },
164 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID) },
165 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID) },
166 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID) },
115c1ce5 167 { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID) },
1da177e4
LT		 168 { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID) },
169 { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID) },
170 { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID) },
171 { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID) },
172 { }, /* optional parameter entry */
173 { } /* Terminating entry */
174};
175
d60d4396 176MODULE_DEVICE_TABLE(usb, id_table_combined);
1da177e4
LT		 177
178static struct usb_driver visor_driver = {
1da177e4
LT		 179 .name = "visor",
180 .probe = usb_serial_probe,
181 .disconnect = usb_serial_disconnect,
182 .id_table = id_table_combined,
ba9dc657 183 .no_dynamic_id = 1,
1da177e4
LT		 184};
185
d60d4396
AC		 186/* All of the device info needed for the Handspring Visor,
187 and Palm 4.0 devices */
ea65370d 188static struct usb_serial_driver handspring_device = {
18fcac35
GKH		 189 .driver = {
190 .owner = THIS_MODULE,
269bda1c 191 .name = "visor",
18fcac35 192 },
269bda1c 193 .description = "Handspring Visor / Palm OS",
d9b1b787 194 .usb_driver = &visor_driver,
1da177e4 195 .id_table = id_table,
1da177e4
LT		 196 .num_ports = 2,
197 .open = visor_open,
198 .close = visor_close,
199 .throttle = visor_throttle,
200 .unthrottle = visor_unthrottle,
201 .attach = treo_attach,
202 .probe = visor_probe,
203 .calc_num_ports = visor_calc_num_ports,
f9c99bb8 204 .release = visor_release,
1da177e4
LT		 205 .write = visor_write,
206 .write_room = visor_write_room,
1da177e4
LT		 207 .write_bulk_callback = visor_write_bulk_callback,
208 .read_bulk_callback = visor_read_bulk_callback,
209 .read_int_callback = visor_read_int_callback,
210};
211
212/* All of the device info needed for the Clie UX50, TH55 Palm 5.0 devices */
ea65370d 213static struct usb_serial_driver clie_5_device = {
18fcac35
GKH		 214 .driver = {
215 .owner = THIS_MODULE,
269bda1c 216 .name = "clie_5",
18fcac35 217 },
269bda1c 218 .description = "Sony Clie 5.0",
d9b1b787 219 .usb_driver = &visor_driver,
1da177e4 220 .id_table = clie_id_5_table,
1da177e4
LT		 221 .num_ports = 2,
222 .open = visor_open,
223 .close = visor_close,
224 .throttle = visor_throttle,
225 .unthrottle = visor_unthrottle,
226 .attach = clie_5_attach,
227 .probe = visor_probe,
228 .calc_num_ports = visor_calc_num_ports,
f9c99bb8 229 .release = visor_release,
1da177e4
LT		 230 .write = visor_write,
231 .write_room = visor_write_room,
1da177e4
LT		 232 .write_bulk_callback = visor_write_bulk_callback,
233 .read_bulk_callback = visor_read_bulk_callback,
234 .read_int_callback = visor_read_int_callback,
235};
236
237/* device info for the Sony Clie OS version 3.5 */
ea65370d 238static struct usb_serial_driver clie_3_5_device = {
18fcac35
GKH		 239 .driver = {
240 .owner = THIS_MODULE,
269bda1c 241 .name = "clie_3.5",
18fcac35 242 },
269bda1c 243 .description = "Sony Clie 3.5",
d9b1b787 244 .usb_driver = &visor_driver,
1da177e4 245 .id_table = clie_id_3_5_table,
1da177e4
LT		 246 .num_ports = 1,
247 .open = visor_open,
248 .close = visor_close,
249 .throttle = visor_throttle,
250 .unthrottle = visor_unthrottle,
251 .attach = clie_3_5_startup,
1da177e4
LT		 252 .write = visor_write,
253 .write_room = visor_write_room,
1da177e4
LT		 254 .write_bulk_callback = visor_write_bulk_callback,
255 .read_bulk_callback = visor_read_bulk_callback,
256};
257
258struct visor_private {
259 spinlock_t lock;
260 int bytes_in;
261 int bytes_out;
262 int outstanding_urbs;
b308e74d
ON		 263 unsigned char throttled;
264 unsigned char actually_throttled;
1da177e4
LT		 265};
266
267/* number of outstanding urbs to prevent userspace DoS from happening */
268#define URB_UPPER_LIMIT 42
269
270static int stats;
271
272/******************************************************************************
273 * Handspring Visor specific driver functions
274 ******************************************************************************/
a509a7e4 275static int visor_open(struct tty_struct *tty, struct usb_serial_port *port)
1da177e4
LT		 276{
277 struct usb_serial *serial = port->serial;
278 struct visor_private *priv = usb_get_serial_port_data(port);
279 unsigned long flags;
280 int result = 0;
281
441b62c1 282 dbg("%s - port %d", __func__, port->number);
1da177e4
LT		 283
284 if (!port->read_urb) {
285 /* this is needed for some brain dead Sony devices */
286 dev_err(&port->dev, "Device lied about number of ports, please use a lower one.\n");
287 return -ENODEV;
288 }
289
290 spin_lock_irqsave(&priv->lock, flags);
291 priv->bytes_in = 0;
292 priv->bytes_out = 0;
1da177e4
LT		 293 priv->throttled = 0;
294 spin_unlock_irqrestore(&priv->lock, flags);
295
1da177e4 296 /* Start reading from the device */
d60d4396
AC		 297 usb_fill_bulk_urb(port->read_urb, serial->dev,
298 usb_rcvbulkpipe(serial->dev,
1da177e4
LT		 299 port->bulk_in_endpointAddress),
300 port->read_urb->transfer_buffer,
301 port->read_urb->transfer_buffer_length,
302 visor_read_bulk_callback, port);
303 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
304 if (result) {
d60d4396
AC		 305 dev_err(&port->dev,
306 "%s - failed submitting read urb, error %d\n",
307 __func__, result);
1da177e4
LT		 308 goto exit;
309 }
d60d4396 310
1da177e4 311 if (port->interrupt_in_urb) {
441b62c1 312 dbg("%s - adding interrupt input for treo", __func__);
1da177e4
LT		 313 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
314 if (result)
d60d4396
AC		 315 dev_err(&port->dev,
316 "%s - failed submitting interrupt urb, error %d\n",
317 __func__, result);
1da177e4 318 }
d60d4396 319exit:
1da177e4
LT		 320 return result;
321}
322
323
335f8514 324static void visor_close(struct usb_serial_port *port)
1da177e4
LT		 325{
326 struct visor_private *priv = usb_get_serial_port_data(port);
327 unsigned char *transfer_buffer;
328
441b62c1 329 dbg("%s - port %d", __func__, port->number);
d60d4396 330
1da177e4
LT		 331 /* shutdown our urbs */
332 usb_kill_urb(port->read_urb);
bcb54a54 333 usb_kill_urb(port->interrupt_in_urb);
1da177e4 334
e33fe4d8
ON		 335 mutex_lock(&port->serial->disc_mutex);
336 if (!port->serial->disconnected) {
337 /* Try to send shutdown message, unless the device is gone */
d60d4396 338 transfer_buffer = kmalloc(0x12, GFP_KERNEL);
e33fe4d8 339 if (transfer_buffer) {
d60d4396 340 usb_control_msg(port->serial->dev,
e33fe4d8
ON		 341 usb_rcvctrlpipe(port->serial->dev, 0),
342 VISOR_CLOSE_NOTIFICATION, 0xc2,
343 0x0000, 0x0000,
344 transfer_buffer, 0x12, 300);
d60d4396 345 kfree(transfer_buffer);
e33fe4d8 346 }
1da177e4 347 }
95bef012 348 mutex_unlock(&port->serial->disc_mutex);
1da177e4
LT		 349
350 if (stats)
351 dev_info(&port->dev, "Bytes In = %d Bytes Out = %d\n",
352 priv->bytes_in, priv->bytes_out);
353}
354
355
95da310e
AC		 356static int visor_write(struct tty_struct *tty, struct usb_serial_port *port,
357 const unsigned char *buf, int count)
1da177e4
LT		 358{
359 struct visor_private *priv = usb_get_serial_port_data(port);
360 struct usb_serial *serial = port->serial;
361 struct urb *urb;
362 unsigned char *buffer;
363 unsigned long flags;
364 int status;
365
441b62c1 366 dbg("%s - port %d", __func__, port->number);
1da177e4
LT		 367
368 spin_lock_irqsave(&priv->lock, flags);
369 if (priv->outstanding_urbs > URB_UPPER_LIMIT) {
370 spin_unlock_irqrestore(&priv->lock, flags);
759f3634 371 dbg("%s - write limit hit", __func__);
1da177e4
LT		 372 return 0;
373 }
b80349b1 374 priv->outstanding_urbs++;
1da177e4
LT		 375 spin_unlock_irqrestore(&priv->lock, flags);
376
d60d4396 377 buffer = kmalloc(count, GFP_ATOMIC);
1da177e4
LT		 378 if (!buffer) {
379 dev_err(&port->dev, "out of memory\n");
b80349b1
ON		 380 count = -ENOMEM;
381 goto error_no_buffer;
1da177e4
LT		 382 }
383
384 urb = usb_alloc_urb(0, GFP_ATOMIC);
385 if (!urb) {
386 dev_err(&port->dev, "no more free urbs\n");
b80349b1
ON		 387 count = -ENOMEM;
388 goto error_no_urb;
1da177e4
LT		 389 }
390
d60d4396 391 memcpy(buffer, buf, count);
1da177e4 392
441b62c1 393 usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
1da177e4 394
d60d4396
AC		 395 usb_fill_bulk_urb(urb, serial->dev,
396 usb_sndbulkpipe(serial->dev,
1da177e4 397 port->bulk_out_endpointAddress),
d60d4396 398 buffer, count,
1da177e4
LT		 399 visor_write_bulk_callback, port);
400
401 /* send it down the pipe */
402 status = usb_submit_urb(urb, GFP_ATOMIC);
403 if (status) {
d60d4396
AC		 404 dev_err(&port->dev,
405 "%s - usb_submit_urb(write bulk) failed with status = %d\n",
406 __func__, status);
1da177e4 407 count = status;
b80349b1 408 goto error;
1da177e4
LT		 409 } else {
410 spin_lock_irqsave(&priv->lock, flags);
1da177e4
LT		 411 priv->bytes_out += count;
412 spin_unlock_irqrestore(&priv->lock, flags);
413 }
414
415 /* we are done with this urb, so let the host driver
416 * really free it when it is finished with it */
b80349b1 417 usb_free_urb(urb);
1da177e4 418
b80349b1
ON		 419 return count;
420error:
421 usb_free_urb(urb);
422error_no_urb:
423 kfree(buffer);
424error_no_buffer:
425 spin_lock_irqsave(&priv->lock, flags);
426 --priv->outstanding_urbs;
427 spin_unlock_irqrestore(&priv->lock, flags);
1da177e4
LT		 428 return count;
429}
430
431
d60d4396 432static int visor_write_room(struct tty_struct *tty)
1da177e4 433{
95da310e 434 struct usb_serial_port *port = tty->driver_data;
bd97c4f0
PZ		 435 struct visor_private *priv = usb_get_serial_port_data(port);
436 unsigned long flags;
437
441b62c1 438 dbg("%s - port %d", __func__, port->number);
1da177e4
LT		 439
440 /*
441 * We really can take anything the user throws at us
442 * but let's pick a nice big number to tell the tty
bd97c4f0 443 * layer that we have lots of free space, unless we don't.
1da177e4 444 */
bd97c4f0
PZ		 445
446 spin_lock_irqsave(&priv->lock, flags);
447 if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) {
448 spin_unlock_irqrestore(&priv->lock, flags);
759f3634 449 dbg("%s - write limit hit", __func__);
bd97c4f0
PZ		 450 return 0;
451 }
452 spin_unlock_irqrestore(&priv->lock, flags);
453
1da177e4
LT		 454 return 2048;
455}
456
457
d60d4396 458static void visor_write_bulk_callback(struct urb *urb)
1da177e4 459{
cdc97792 460 struct usb_serial_port *port = urb->context;
1da177e4 461 struct visor_private *priv = usb_get_serial_port_data(port);
38e8c910 462 int status = urb->status;
1da177e4
LT		 463 unsigned long flags;
464
465 /* free up the transfer buffer, as usb_free_urb() does not do this */
d60d4396 466 kfree(urb->transfer_buffer);
1da177e4 467
441b62c1 468 dbg("%s - port %d", __func__, port->number);
38e8c910
GKH		 469
470 if (status)
1da177e4 471 dbg("%s - nonzero write bulk status received: %d",
441b62c1 472 __func__, status);
1da177e4
LT		 473
474 spin_lock_irqsave(&priv->lock, flags);
475 --priv->outstanding_urbs;
476 spin_unlock_irqrestore(&priv->lock, flags);
477
cf2c7481 478 usb_serial_port_softint(port);
1da177e4
LT		 479}
480
481
d60d4396 482static void visor_read_bulk_callback(struct urb *urb)
1da177e4 483{
cdc97792 484 struct usb_serial_port *port = urb->context;
1da177e4
LT		 485 struct visor_private *priv = usb_get_serial_port_data(port);
486 unsigned char *data = urb->transfer_buffer;
38e8c910 487 int status = urb->status;
1da177e4 488 struct tty_struct *tty;
1da177e4 489 int result;
4a90f09b 490 int available_room = 0;
1da177e4 491
441b62c1 492 dbg("%s - port %d", __func__, port->number);
1da177e4 493
38e8c910
GKH		 494 if (status) {
495 dbg("%s - nonzero read bulk status received: %d",
441b62c1 496 __func__, status);
1da177e4
LT		 497 return;
498 }
499
d60d4396
AC		 500 usb_serial_debug_data(debug, &port->dev, __func__,
501 urb->actual_length, data);
1da177e4 502
4a90f09b
AC		 503 if (urb->actual_length) {
504 tty = tty_port_tty_get(&port->port);
505 if (tty) {
a108bfcb
AC		 506 tty_insert_flip_string(tty, data,
507 urb->actual_length);
508 tty_flip_buffer_push(tty);
4a90f09b 509 tty_kref_put(tty);
b308e74d
ON		 510 }
511 spin_lock(&priv->lock);
4c9fde9b
ON		 512 if (tty)
513 priv->bytes_in += available_room;
b308e74d
ON		 514
515 } else {
516 spin_lock(&priv->lock);
1da177e4 517 }
1da177e4
LT		 518
519 /* Continue trying to always read if we should */
b308e74d 520 if (!priv->throttled) {
d60d4396 521 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
1da177e4 522 usb_rcvbulkpipe(port->serial->dev,
d60d4396 523 port->bulk_in_endpointAddress),
1da177e4
LT		 524 port->read_urb->transfer_buffer,
525 port->read_urb->transfer_buffer_length,
526 visor_read_bulk_callback, port);
527 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
528 if (result)
d60d4396
AC		 529 dev_err(&port->dev,
530 "%s - failed resubmitting read urb, error %d\n",
531 __func__, result);
532 } else
b308e74d 533 priv->actually_throttled = 1;
b308e74d 534 spin_unlock(&priv->lock);
1da177e4
LT		 535}
536
d60d4396 537static void visor_read_int_callback(struct urb *urb)
1da177e4 538{
cdc97792 539 struct usb_serial_port *port = urb->context;
38e8c910 540 int status = urb->status;
1da177e4
LT		 541 int result;
542
38e8c910 543 switch (status) {
1da177e4
LT		 544 case 0:
545 /* success */
546 break;
547 case -ECONNRESET:
548 case -ENOENT:
549 case -ESHUTDOWN:
550 /* this urb is terminated, clean up */
551 dbg("%s - urb shutting down with status: %d",
441b62c1 552 __func__, status);
1da177e4
LT		 553 return;
554 default:
555 dbg("%s - nonzero urb status received: %d",
441b62c1 556 __func__, status);
1da177e4
LT		 557 goto exit;
558 }
559
560 /*
561 * This information is still unknown what it can be used for.
562 * If anyone has an idea, please let the author know...
563 *
564 * Rumor has it this endpoint is used to notify when data
565 * is ready to be read from the bulk ones.
566 */
441b62c1 567 usb_serial_debug_data(debug, &port->dev, __func__,
1da177e4
LT		 568 urb->actual_length, urb->transfer_buffer);
569
570exit:
d60d4396 571 result = usb_submit_urb(urb, GFP_ATOMIC);
1da177e4 572 if (result)
d60d4396
AC		 573 dev_err(&urb->dev->dev,
574 "%s - Error %d submitting interrupt urb\n",
575 __func__, result);
1da177e4
LT		 576}
577
d60d4396 578static void visor_throttle(struct tty_struct *tty)
1da177e4 579{
95da310e 580 struct usb_serial_port *port = tty->driver_data;
1da177e4 581 struct visor_private *priv = usb_get_serial_port_data(port);
1da177e4 582
441b62c1 583 dbg("%s - port %d", __func__, port->number);
63832515 584 spin_lock_irq(&priv->lock);
1da177e4 585 priv->throttled = 1;
63832515 586 spin_unlock_irq(&priv->lock);
1da177e4
LT		 587}
588
589
d60d4396 590static void visor_unthrottle(struct tty_struct *tty)
1da177e4 591{
95da310e 592 struct usb_serial_port *port = tty->driver_data;
1da177e4 593 struct visor_private *priv = usb_get_serial_port_data(port);
a1c33952 594 int result, was_throttled;
1da177e4 595
441b62c1 596 dbg("%s - port %d", __func__, port->number);
63832515 597 spin_lock_irq(&priv->lock);
1da177e4 598 priv->throttled = 0;
a1c33952 599 was_throttled = priv->actually_throttled;
b308e74d 600 priv->actually_throttled = 0;
63832515 601 spin_unlock_irq(&priv->lock);
1da177e4 602
a1c33952
ON		 603 if (was_throttled) {
604 port->read_urb->dev = port->serial->dev;
605 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
606 if (result)
607 dev_err(&port->dev,
608 "%s - failed submitting read urb, error %d\n",
d60d4396 609 __func__, result);
a1c33952 610 }
1da177e4
LT		 611}
612
d60d4396
AC		 613static int palm_os_3_probe(struct usb_serial *serial,
614 const struct usb_device_id *id)
1da177e4
LT		 615{
616 struct device *dev = &serial->dev->dev;
617 struct visor_connection_info *connection_info;
618 unsigned char *transfer_buffer;
619 char *string;
620 int retval = 0;
621 int i;
622 int num_ports = 0;
623
441b62c1 624 dbg("%s", __func__);
1da177e4 625
d60d4396 626 transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL);
1da177e4 627 if (!transfer_buffer) {
441b62c1 628 dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __func__,
1da177e4
LT		 629 sizeof(*connection_info));
630 return -ENOMEM;
631 }
632
633 /* send a get connection info request */
d60d4396 634 retval = usb_control_msg(serial->dev,
1da177e4
LT		 635 usb_rcvctrlpipe(serial->dev, 0),
636 VISOR_GET_CONNECTION_INFORMATION,
637 0xc2, 0x0000, 0x0000, transfer_buffer,
638 sizeof(*connection_info), 300);
639 if (retval < 0) {
640 dev_err(dev, "%s - error %d getting connection information\n",
441b62c1 641 __func__, retval);
1da177e4
LT		 642 goto exit;
643 }
644
645 if (retval == sizeof(*connection_info)) {
d60d4396
AC		 646 connection_info = (struct visor_connection_info *)
647 transfer_buffer;
1da177e4
LT		 648
649 num_ports = le16_to_cpu(connection_info->num_ports);
650 for (i = 0; i < num_ports; ++i) {
d60d4396
AC		 651 switch (
652 connection_info->connections[i].port_function_id) {
653 case VISOR_FUNCTION_GENERIC:
654 string = "Generic";
655 break;
656 case VISOR_FUNCTION_DEBUGGER:
657 string = "Debugger";
658 break;
659 case VISOR_FUNCTION_HOTSYNC:
660 string = "HotSync";
661 break;
662 case VISOR_FUNCTION_CONSOLE:
663 string = "Console";
664 break;
665 case VISOR_FUNCTION_REMOTE_FILE_SYS:
666 string = "Remote File System";
667 break;
668 default:
669 string = "unknown";
670 break;
1da177e4
LT		 671 }
672 dev_info(dev, "%s: port %d, is for %s use\n",
269bda1c 673 serial->type->description,
1da177e4
LT		 674 connection_info->connections[i].port, string);
675 }
676 }
677 /*
678 * Handle devices that report invalid stuff here.
679 */
680 if (num_ports == 0 || num_ports > 2) {
d60d4396 681 dev_warn(dev, "%s: No valid connect info available\n",
269bda1c 682 serial->type->description);
1da177e4
LT		 683 num_ports = 2;
684 }
d60d4396 685
269bda1c 686 dev_info(dev, "%s: Number of ports: %d\n", serial->type->description,
1da177e4
LT		 687 num_ports);
688
689 /*
690 * save off our num_ports info so that we can use it in the
691 * calc_num_ports callback
692 */
693 usb_set_serial_data(serial, (void *)(long)num_ports);
694
d60d4396
AC		 695 /* ask for the number of bytes available, but ignore the
696 response as it is broken */
697 retval = usb_control_msg(serial->dev,
1da177e4
LT		 698 usb_rcvctrlpipe(serial->dev, 0),
699 VISOR_REQUEST_BYTES_AVAILABLE,
700 0xc2, 0x0000, 0x0005, transfer_buffer,
701 0x02, 300);
702 if (retval < 0)
703 dev_err(dev, "%s - error %d getting bytes available request\n",
441b62c1 704 __func__, retval);
1da177e4
LT		 705 retval = 0;
706
707exit:
d60d4396 708 kfree(transfer_buffer);
1da177e4
LT		 709
710 return retval;
711}
712
d60d4396
AC		 713static int palm_os_4_probe(struct usb_serial *serial,
714 const struct usb_device_id *id)
1da177e4
LT		 715{
716 struct device *dev = &serial->dev->dev;
717 struct palm_ext_connection_info *connection_info;
718 unsigned char *transfer_buffer;
719 int retval;
720
441b62c1 721 dbg("%s", __func__);
1da177e4 722
d60d4396 723 transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL);
1da177e4 724 if (!transfer_buffer) {
441b62c1 725 dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __func__,
1da177e4
LT		 726 sizeof(*connection_info));
727 return -ENOMEM;
728 }
729
d60d4396
AC		 730 retval = usb_control_msg(serial->dev,
731 usb_rcvctrlpipe(serial->dev, 0),
1da177e4
LT		 732 PALM_GET_EXT_CONNECTION_INFORMATION,
733 0xc2, 0x0000, 0x0000, transfer_buffer,
d60d4396 734 sizeof(*connection_info), 300);
1da177e4
LT		 735 if (retval < 0)
736 dev_err(dev, "%s - error %d getting connection info\n",
441b62c1 737 __func__, retval);
1da177e4 738 else
441b62c1 739 usb_serial_debug_data(debug, &serial->dev->dev, __func__,
1da177e4
LT		 740 retval, transfer_buffer);
741
d60d4396 742 kfree(transfer_buffer);
1da177e4
LT		 743 return 0;
744}
745
746
d60d4396
AC		 747static int visor_probe(struct usb_serial *serial,
748 const struct usb_device_id *id)
1da177e4
LT		 749{
750 int retval = 0;
d60d4396
AC		 751 int (*startup)(struct usb_serial *serial,
752 const struct usb_device_id *id);
1da177e4 753
441b62c1 754 dbg("%s", __func__);
1da177e4
LT		 755
756 if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
194343d9 757 dev_err(&serial->dev->dev, "active config #%d != 1 ??\n",
1da177e4
LT		 758 serial->dev->actconfig->desc.bConfigurationValue);
759 return -ENODEV;
760 }
761
762 if (id->driver_info) {
763 startup = (void *)id->driver_info;
764 retval = startup(serial, id);
765 }
766
767 return retval;
768}
769
d60d4396 770static int visor_calc_num_ports(struct usb_serial *serial)
1da177e4
LT		 771{
772 int num_ports = (int)(long)(usb_get_serial_data(serial));
773
774 if (num_ports)
775 usb_set_serial_data(serial, NULL);
776
777 return num_ports;
778}
779
780static int generic_startup(struct usb_serial *serial)
781{
bd97c4f0 782 struct usb_serial_port **ports = serial->port;
1da177e4
LT		 783 struct visor_private *priv;
784 int i;
785
786 for (i = 0; i < serial->num_ports; ++i) {
d60d4396 787 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
bd97c4f0
PZ		 788 if (!priv) {
789 while (i-- != 0) {
790 priv = usb_get_serial_port_data(ports[i]);
791 usb_set_serial_port_data(ports[i], NULL);
792 kfree(priv);
793 }
1da177e4 794 return -ENOMEM;
bd97c4f0 795 }
1da177e4 796 spin_lock_init(&priv->lock);
bd97c4f0 797 usb_set_serial_port_data(ports[i], priv);
1da177e4
LT		 798 }
799 return 0;
800}
801
d60d4396 802static int clie_3_5_startup(struct usb_serial *serial)
1da177e4
LT		 803{
804 struct device *dev = &serial->dev->dev;
805 int result;
401711cb 806 u8 *data;
1da177e4 807
441b62c1 808 dbg("%s", __func__);
1da177e4 809
401711cb
JH		 810 data = kmalloc(1, GFP_KERNEL);
811 if (!data)
812 return -ENOMEM;
813
1da177e4
LT		 814 /*
815 * Note that PEG-300 series devices expect the following two calls.
816 */
817
818 /* get the config number */
d60d4396 819 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
1da177e4 820 USB_REQ_GET_CONFIGURATION, USB_DIR_IN,
401711cb 821 0, 0, data, 1, 3000);
1da177e4 822 if (result < 0) {
d60d4396
AC		 823 dev_err(dev, "%s: get config number failed: %d\n",
824 __func__, result);
401711cb 825 goto out;
1da177e4
LT		 826 }
827 if (result != 1) {
d60d4396
AC		 828 dev_err(dev, "%s: get config number bad return length: %d\n",
829 __func__, result);
401711cb
JH		 830 result = -EIO;
831 goto out;
1da177e4
LT		 832 }
833
834 /* get the interface number */
d60d4396
AC		 835 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
836 USB_REQ_GET_INTERFACE,
1da177e4 837 USB_DIR_IN | USB_RECIP_INTERFACE,
401711cb 838 0, 0, data, 1, 3000);
1da177e4 839 if (result < 0) {
d60d4396
AC		 840 dev_err(dev, "%s: get interface number failed: %d\n",
841 __func__, result);
401711cb 842 goto out;
1da177e4
LT		 843 }
844 if (result != 1) {
d60d4396
AC		 845 dev_err(dev,
846 "%s: get interface number bad return length: %d\n",
847 __func__, result);
401711cb
JH		 848 result = -EIO;
849 goto out;
1da177e4
LT		 850 }
851
401711cb
JH		 852 result = generic_startup(serial);
853out:
854 kfree(data);
855
856 return result;
1da177e4 857}
d60d4396
AC		 858
859static int treo_attach(struct usb_serial *serial)
1da177e4
LT		 860{
861 struct usb_serial_port *swap_port;
862
863 /* Only do this endpoint hack for the Handspring devices with
864 * interrupt in endpoints, which for now are the Treo devices. */
d60d4396
AC		 865 if (!((le16_to_cpu(serial->dev->descriptor.idVendor)
866 == HANDSPRING_VENDOR_ID) ||
867 (le16_to_cpu(serial->dev->descriptor.idVendor)
868 == KYOCERA_VENDOR_ID)) ||
869 (serial->num_interrupt_in == 0))
1da177e4
LT		 870 goto generic_startup;
871
441b62c1 872 dbg("%s", __func__);
1da177e4
LT		 873
874 /*
d60d4396
AC		 875 * It appears that Treos and Kyoceras want to use the
876 * 1st bulk in endpoint to communicate with the 2nd bulk out endpoint,
877 * so let's swap the 1st and 2nd bulk in and interrupt endpoints.
878 * Note that swapping the bulk out endpoints would break lots of
1da177e4
LT		 879 * apps that want to communicate on the second port.
880 */
881#define COPY_PORT(dest, src) \
d60d4396
AC		 882 do { \
883 dest->read_urb = src->read_urb; \
884 dest->bulk_in_endpointAddress = src->bulk_in_endpointAddress;\
885 dest->bulk_in_buffer = src->bulk_in_buffer; \
886 dest->interrupt_in_urb = src->interrupt_in_urb; \
887 dest->interrupt_in_endpointAddress = \
888 src->interrupt_in_endpointAddress;\
889 dest->interrupt_in_buffer = src->interrupt_in_buffer; \
890 } while (0);
1da177e4
LT		 891
892 swap_port = kmalloc(sizeof(*swap_port), GFP_KERNEL);
893 if (!swap_port)
894 return -ENOMEM;
895 COPY_PORT(swap_port, serial->port[0]);
896 COPY_PORT(serial->port[0], serial->port[1]);
897 COPY_PORT(serial->port[1], swap_port);
898 kfree(swap_port);
899
900generic_startup:
901 return generic_startup(serial);
902}
903
d60d4396 904static int clie_5_attach(struct usb_serial *serial)
1da177e4 905{
441b62c1 906 dbg("%s", __func__);
1da177e4 907
d60d4396
AC		 908 /* TH55 registers 2 ports.
909 Communication in from the UX50/TH55 uses bulk_in_endpointAddress
910 from port 0. Communication out to the UX50/TH55 uses
911 bulk_out_endpointAddress from port 1
912
1da177e4
LT		 913 Lets do a quick and dirty mapping
914 */
d60d4396 915
1da177e4
LT		 916 /* some sanity check */
917 if (serial->num_ports < 2)
918 return -1;
d60d4396 919
1da177e4 920 /* port 0 now uses the modified endpoint Address */
d60d4396
AC		 921 serial->port[0]->bulk_out_endpointAddress =
922 serial->port[1]->bulk_out_endpointAddress;
1da177e4
LT		 923
924 return generic_startup(serial);
925}
926
f9c99bb8 927static void visor_release(struct usb_serial *serial)
1da177e4 928{
bd97c4f0
PZ		 929 struct visor_private *priv;
930 int i;
931
441b62c1 932 dbg("%s", __func__);
bd97c4f0
PZ		 933
934 for (i = 0; i < serial->num_ports; i++) {
935 priv = usb_get_serial_port_data(serial->port[i]);
f9c99bb8 936 kfree(priv);
bd97c4f0 937 }
1da177e4
LT		 938}
939
d60d4396 940static int __init visor_init(void)
1da177e4
LT		 941{
942 int i, retval;
943 /* Only if parameters were passed to us */
d60d4396
AC		 944 if (vendor > 0 && product > 0) {
945 struct usb_device_id usb_dev_temp[] = {
946 {
947 USB_DEVICE(vendor, product),
948 .driver_info =
949 (kernel_ulong_t) &palm_os_4_probe
950 }
951 };
1da177e4
LT		 952
953 /* Find the last entry in id_table */
d60d4396
AC		 954 for (i = 0;; i++) {
955 if (id_table[i].idVendor == 0) {
1da177e4
LT		 956 id_table[i] = usb_dev_temp[0];
957 break;
958 }
959 }
960 /* Find the last entry in id_table_combined */
d60d4396
AC		 961 for (i = 0;; i++) {
962 if (id_table_combined[i].idVendor == 0) {
1da177e4
LT		 963 id_table_combined[i] = usb_dev_temp[0];
964 break;
965 }
966 }
c197a8db
GKH		 967 printk(KERN_INFO KBUILD_MODNAME
968 ": Untested USB device specified at time of module insertion\n");
969 printk(KERN_INFO KBUILD_MODNAME
970 ": Warning: This is not guaranteed to work\n");
971 printk(KERN_INFO KBUILD_MODNAME
972 ": Using a newer kernel is preferred to this method\n");
973 printk(KERN_INFO KBUILD_MODNAME
974 ": Adding Palm OS protocol 4.x support for unknown device: 0x%x/0x%x\n",
1da177e4
LT		 975 vendor, product);
976 }
977 retval = usb_serial_register(&handspring_device);
978 if (retval)
979 goto failed_handspring_register;
980 retval = usb_serial_register(&clie_3_5_device);
981 if (retval)
982 goto failed_clie_3_5_register;
983 retval = usb_serial_register(&clie_5_device);
984 if (retval)
985 goto failed_clie_5_register;
986 retval = usb_register(&visor_driver);
d60d4396 987 if (retval)
1da177e4 988 goto failed_usb_register;
c197a8db 989 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1da177e4
LT		 990
991 return 0;
992failed_usb_register:
993 usb_serial_deregister(&clie_5_device);
994failed_clie_5_register:
995 usb_serial_deregister(&clie_3_5_device);
996failed_clie_3_5_register:
997 usb_serial_deregister(&handspring_device);
998failed_handspring_register:
999 return retval;
1000}
1001
1002
1003static void __exit visor_exit (void)
1004{
d60d4396
AC		 1005 usb_deregister(&visor_driver);
1006 usb_serial_deregister(&handspring_device);
1007 usb_serial_deregister(&clie_3_5_device);
1008 usb_serial_deregister(&clie_5_device);
1da177e4
LT		 1009}
1010
1011
1012module_init(visor_init);
1013module_exit(visor_exit);
1014
d60d4396
AC		 1015MODULE_AUTHOR(DRIVER_AUTHOR);
1016MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4
LT		 1017MODULE_LICENSE("GPL");
1018
1019module_param(debug, bool, S_IRUGO | S_IWUSR);
1020MODULE_PARM_DESC(debug, "Debug enabled or not");
1021module_param(stats, bool, S_IRUGO | S_IWUSR);
1022MODULE_PARM_DESC(stats, "Enables statistics or not");
1023
1024module_param(vendor, ushort, 0);
1025MODULE_PARM_DESC(vendor, "User specified vendor ID");
1026module_param(product, ushort, 0);
1027MODULE_PARM_DESC(product, "User specified product ID");
1028
Linux kernel - Deliverables
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