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[XFRM]: skb_cow_data() does not set proper owner for new skbs.
[linux-2.6/verdex.git] / drivers / usb / serial / visor.c
blob31c57adcb623c5cbd682216a7cc3b8ea748c28c8
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 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * See Documentation/usb/usb-serial.txt for more information on using this driver
14 *
15 * (06/03/2003) Judd Montgomery <judd at jpilot.org>
16 * Added support for module parameter options for untested/unknown
17 * devices.
18 *
19 * (03/09/2003) gkh
20 * Added support for the Sony Clie NZ90V device. Thanks to Martin Brachtl
21 * <brachtl@redgrep.cz> for the information.
22 *
23 * (03/05/2003) gkh
24 * Think Treo support is now working.
25 *
26 * (04/03/2002) gkh
27 * Added support for the Sony OS 4.1 devices. Thanks to Hiroyuki ARAKI
28 * <hiro@zob.ne.jp> for the information.
29 *
30 * (03/27/2002) gkh
31 * Removed assumptions that port->tty was always valid (is not true
32 * for usb serial console devices.)
33 *
34 * (03/23/2002) gkh
35 * Added support for the Palm i705 device, thanks to Thomas Riemer
36 * <tom@netmech.com> for the information.
37 *
38 * (03/21/2002) gkh
39 * Added support for the Palm m130 device, thanks to Udo Eisenbarth
40 * <udo.eisenbarth@web.de> for the information.
41 *
42 * (02/27/2002) gkh
43 * Reworked the urb handling logic. We have no more pool, but dynamically
44 * allocate the urb and the transfer buffer on the fly. In testing this
45 * does not incure any measurable overhead. This also relies on the fact
46 * that we have proper reference counting logic for urbs.
47 *
48 * (02/21/2002) SilaS
49 * Added initial support for the Palm m515 devices.
50 *
51 * (02/14/2002) gkh
52 * Added support for the Clie S-360 device.
53 *
54 * (12/18/2001) gkh
55 * Added better Clie support for 3.5 devices. Thanks to Geoffrey Levand
56 * for the patch.
57 *
58 * (11/11/2001) gkh
59 * Added support for the m125 devices, and added check to prevent oopses
60 * for Clié devices that lie about the number of ports they have.
61 *
62 * (08/30/2001) gkh
63 * Added support for the Clie devices, both the 3.5 and 4.0 os versions.
64 * Many thanks to Daniel Burke, and Bryan Payne for helping with this.
65 *
66 * (08/23/2001) gkh
67 * fixed a few potential bugs pointed out by Oliver Neukum.
68 *
69 * (05/30/2001) gkh
70 * switched from using spinlock to a semaphore, which fixes lots of problems.
71 *
72 * (05/28/2000) gkh
73 * Added initial support for the Palm m500 and Palm m505 devices.
74 *
75 * (04/08/2001) gb
76 * Identify version on module load.
77 *
78 * (01/21/2000) gkh
79 * Added write_room and chars_in_buffer, as they were previously using the
80 * generic driver versions which is all wrong now that we are using an urb
81 * pool. Thanks to Wolfgang Grandegger for pointing this out to me.
82 * Removed count assignment in the write function, which was not needed anymore
83 * either. Thanks to Al Borchers for pointing this out.
84 *
85 * (12/12/2000) gkh
86 * Moved MOD_DEC to end of visor_close to be nicer, as the final write
87 * message can sleep.
88 *
89 * (11/12/2000) gkh
90 * Fixed bug with data being dropped on the floor by forcing tty->low_latency
91 * to be on. Hopefully this fixes the OHCI issue!
92 *
93 * (11/01/2000) Adam J. Richter
94 * usb_device_id table support
95 *
96 * (10/05/2000) gkh
97 * Fixed bug with urb->dev not being set properly, now that the usb
98 * core needs it.
99 *
100 * (09/11/2000) gkh
101 * Got rid of always calling kmalloc for every urb we wrote out to the
102 * device.
103 * Added visor_read_callback so we can keep track of bytes in and out for
104 * those people who like to know the speed of their device.
105 * Removed DEBUG #ifdefs with call to usb_serial_debug_data
106 *
107 * (09/06/2000) gkh
108 * Fixed oops in visor_exit. Need to uncomment usb_unlink_urb call _after_
109 * the host controller drivers set urb->dev = NULL when the urb is finished.
110 *
111 * (08/28/2000) gkh
112 * Added locks for SMP safeness.
113 *
114 * (08/08/2000) gkh
115 * Fixed endian problem in visor_startup.
116 * Fixed MOD_INC and MOD_DEC logic and the ability to open a port more
117 * than once.
118 *
119 * (07/23/2000) gkh
120 * Added pool of write urbs to speed up transfers to the visor.
121 *
122 * (07/19/2000) gkh
123 * Added module_init and module_exit functions to handle the fact that this
124 * driver is a loadable module now.
125 *
126 * (07/03/2000) gkh
127 * Added visor_set_ioctl and visor_set_termios functions (they don't do much
128 * of anything, but are good for debugging.)
129 *
130 * (06/25/2000) gkh
131 * Fixed bug in visor_unthrottle that should help with the disconnect in PPP
132 * bug that people have been reporting.
133 *
134 * (06/23/2000) gkh
135 * Cleaned up debugging statements in a quest to find UHCI timeout bug.
136 *
137 * (04/27/2000) Ryan VanderBijl
138 * Fixed memory leak in visor_close
139 *
140 * (03/26/2000) gkh
141 * Split driver up into device specific pieces.
142 *
143 */
144
145 #include <linux/config.h>
146 #include <linux/kernel.h>
147 #include <linux/errno.h>
148 #include <linux/init.h>
149 #include <linux/slab.h>
150 #include <linux/tty.h>
151 #include <linux/tty_driver.h>
152 #include <linux/tty_flip.h>
153 #include <linux/module.h>
154 #include <linux/moduleparam.h>
155 #include <linux/spinlock.h>
156 #include <asm/uaccess.h>
157 #include <linux/usb.h>
158 #include "usb-serial.h"
159 #include "visor.h"
160
161 /*
162 * Version Information
163 */
164 #define DRIVER_VERSION "v2.1"
165 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>"
166 #define DRIVER_DESC "USB HandSpring Visor / Palm OS driver"
167
168 /* function prototypes for a handspring visor */
169 static int visor_open (struct usb_serial_port *port, struct file *filp);
170 static void visor_close (struct usb_serial_port *port, struct file *filp);
171 static int visor_write (struct usb_serial_port *port, const unsigned char *buf, int count);
172 static int visor_write_room (struct usb_serial_port *port);
173 static int visor_chars_in_buffer (struct usb_serial_port *port);
174 static void visor_throttle (struct usb_serial_port *port);
175 static void visor_unthrottle (struct usb_serial_port *port);
176 static int visor_probe (struct usb_serial *serial, const struct usb_device_id *id);
177 static int visor_calc_num_ports(struct usb_serial *serial);
178 static void visor_shutdown (struct usb_serial *serial);
179 static int visor_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
180 static void visor_set_termios (struct usb_serial_port *port, struct termios *old_termios);
181 static void visor_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
182 static void visor_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
183 static void visor_read_int_callback (struct urb *urb, struct pt_regs *regs);
184 static int clie_3_5_startup (struct usb_serial *serial);
185 static int treo_attach (struct usb_serial *serial);
186 static int clie_5_attach (struct usb_serial *serial);
187 static int palm_os_3_probe (struct usb_serial *serial, const struct usb_device_id *id);
188 static int palm_os_4_probe (struct usb_serial *serial, const struct usb_device_id *id);
189
190 /* Parameters that may be passed into the module. */
191 static int debug;
192 static __u16 vendor;
193 static __u16 product;
194
195 static struct usb_device_id id_table [] = {
196 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID),
197 .driver_info = (kernel_ulong_t)&palm_os_3_probe },
198 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID),
199 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
200 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID),
201 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
202 { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID),
203 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
204 { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID),
205 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
206 { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID),
207 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
208 { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID),
209 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
210 { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID),
211 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
212 { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID),
213 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
214 { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID),
215 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
216 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID),
217 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
218 { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650),
219 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
220 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID),
221 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
222 { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE31_ID),
223 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
224 { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID),
225 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
226 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID),
227 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
228 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID),
229 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
230 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID),
231 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
232 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID),
233 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
234 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID),
235 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
236 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID),
237 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
238 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID),
239 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
240 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID),
241 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
242 { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID),
243 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
244 { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID),
245 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
246 { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID),
247 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
248 { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID),
249 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
250 { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID),
251 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
252 { }, /* optional parameter entry */
253 { } /* Terminating entry */
254 };
255
256 static struct usb_device_id clie_id_5_table [] = {
257 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID),
258 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
259 { }, /* optional parameter entry */
260 { } /* Terminating entry */
261 };
262
263 static struct usb_device_id clie_id_3_5_table [] = {
264 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
265 { } /* Terminating entry */
266 };
267
268 static struct usb_device_id id_table_combined [] = {
269 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID) },
270 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID) },
271 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID) },
272 { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID) },
273 { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID) },
274 { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID) },
275 { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID) },
276 { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID) },
277 { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID) },
278 { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID) },
279 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID) },
280 { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650) },
281 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID) },
282 { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE31_ID) },
283 { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID) },
284 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
285 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID) },
286 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID) },
287 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID) },
288 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID) },
289 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID) },
290 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID) },
291 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID) },
292 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID) },
293 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID) },
294 { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID) },
295 { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID) },
296 { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID) },
297 { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID) },
298 { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID) },
299 { }, /* optional parameter entry */
300 { } /* Terminating entry */
301 };
302
303 MODULE_DEVICE_TABLE (usb, id_table_combined);
304
305 static struct usb_driver visor_driver = {
306 .owner = THIS_MODULE,
307 .name = "visor",
308 .probe = usb_serial_probe,
309 .disconnect = usb_serial_disconnect,
310 .id_table = id_table_combined,
311 };
312
313 /* All of the device info needed for the Handspring Visor, and Palm 4.0 devices */
314 static struct usb_serial_device_type handspring_device = {
315 .owner = THIS_MODULE,
316 .name = "Handspring Visor / Palm OS",
317 .short_name = "visor",
318 .id_table = id_table,
319 .num_interrupt_in = NUM_DONT_CARE,
320 .num_bulk_in = 2,
321 .num_bulk_out = 2,
322 .num_ports = 2,
323 .open = visor_open,
324 .close = visor_close,
325 .throttle = visor_throttle,
326 .unthrottle = visor_unthrottle,
327 .attach = treo_attach,
328 .probe = visor_probe,
329 .calc_num_ports = visor_calc_num_ports,
330 .shutdown = visor_shutdown,
331 .ioctl = visor_ioctl,
332 .set_termios = visor_set_termios,
333 .write = visor_write,
334 .write_room = visor_write_room,
335 .chars_in_buffer = visor_chars_in_buffer,
336 .write_bulk_callback = visor_write_bulk_callback,
337 .read_bulk_callback = visor_read_bulk_callback,
338 .read_int_callback = visor_read_int_callback,
339 };
340
341 /* All of the device info needed for the Clie UX50, TH55 Palm 5.0 devices */
342 static struct usb_serial_device_type clie_5_device = {
343 .owner = THIS_MODULE,
344 .name = "Sony Clie 5.0",
345 .short_name = "clie_5",
346 .id_table = clie_id_5_table,
347 .num_interrupt_in = NUM_DONT_CARE,
348 .num_bulk_in = 2,
349 .num_bulk_out = 2,
350 .num_ports = 2,
351 .open = visor_open,
352 .close = visor_close,
353 .throttle = visor_throttle,
354 .unthrottle = visor_unthrottle,
355 .attach = clie_5_attach,
356 .probe = visor_probe,
357 .calc_num_ports = visor_calc_num_ports,
358 .shutdown = visor_shutdown,
359 .ioctl = visor_ioctl,
360 .set_termios = visor_set_termios,
361 .write = visor_write,
362 .write_room = visor_write_room,
363 .chars_in_buffer = visor_chars_in_buffer,
364 .write_bulk_callback = visor_write_bulk_callback,
365 .read_bulk_callback = visor_read_bulk_callback,
366 .read_int_callback = visor_read_int_callback,
367 };
368
369 /* device info for the Sony Clie OS version 3.5 */
370 static struct usb_serial_device_type clie_3_5_device = {
371 .owner = THIS_MODULE,
372 .name = "Sony Clie 3.5",
373 .short_name = "clie_3.5",
374 .id_table = clie_id_3_5_table,
375 .num_interrupt_in = 0,
376 .num_bulk_in = 1,
377 .num_bulk_out = 1,
378 .num_ports = 1,
379 .open = visor_open,
380 .close = visor_close,
381 .throttle = visor_throttle,
382 .unthrottle = visor_unthrottle,
383 .attach = clie_3_5_startup,
384 .ioctl = visor_ioctl,
385 .set_termios = visor_set_termios,
386 .write = visor_write,
387 .write_room = visor_write_room,
388 .chars_in_buffer = visor_chars_in_buffer,
389 .write_bulk_callback = visor_write_bulk_callback,
390 .read_bulk_callback = visor_read_bulk_callback,
391 };
392
393 struct visor_private {
394 spinlock_t lock;
395 int bytes_in;
396 int bytes_out;
397 int outstanding_urbs;
398 int throttled;
399 };
400
401 /* number of outstanding urbs to prevent userspace DoS from happening */
402 #define URB_UPPER_LIMIT 42
403
404 static int stats;
405
406 /******************************************************************************
407 * Handspring Visor specific driver functions
408 ******************************************************************************/
409 static int visor_open (struct usb_serial_port *port, struct file *filp)
410 {
411 struct usb_serial *serial = port->serial;
412 struct visor_private *priv = usb_get_serial_port_data(port);
413 unsigned long flags;
414 int result = 0;
415
416 dbg("%s - port %d", __FUNCTION__, port->number);
417
418 if (!port->read_urb) {
419 /* this is needed for some brain dead Sony devices */
420 dev_err(&port->dev, "Device lied about number of ports, please use a lower one.\n");
421 return -ENODEV;
422 }
423
424 spin_lock_irqsave(&priv->lock, flags);
425 priv->bytes_in = 0;
426 priv->bytes_out = 0;
427 priv->outstanding_urbs = 0;
428 priv->throttled = 0;
429 spin_unlock_irqrestore(&priv->lock, flags);
430
431 /*
432 * Force low_latency on so that our tty_push actually forces the data
433 * through, otherwise it is scheduled, and with high data rates (like
434 * with OHCI) data can get lost.
435 */
436 if (port->tty)
437 port->tty->low_latency = 1;
438
439 /* Start reading from the device */
440 usb_fill_bulk_urb (port->read_urb, serial->dev,
441 usb_rcvbulkpipe (serial->dev,
442 port->bulk_in_endpointAddress),
443 port->read_urb->transfer_buffer,
444 port->read_urb->transfer_buffer_length,
445 visor_read_bulk_callback, port);
446 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
447 if (result) {
448 dev_err(&port->dev, "%s - failed submitting read urb, error %d\n",
449 __FUNCTION__, result);
450 goto exit;
451 }
452
453 if (port->interrupt_in_urb) {
454 dbg("%s - adding interrupt input for treo", __FUNCTION__);
455 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
456 if (result)
457 dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n",
458 __FUNCTION__, result);
459 }
460 exit:
461 return result;
462 }
463
464
465 static void visor_close (struct usb_serial_port *port, struct file * filp)
466 {
467 struct visor_private *priv = usb_get_serial_port_data(port);
468 unsigned char *transfer_buffer;
469
470 dbg("%s - port %d", __FUNCTION__, port->number);
471
472 /* shutdown our urbs */
473 usb_kill_urb(port->read_urb);
474 if (port->interrupt_in_urb)
475 usb_kill_urb(port->interrupt_in_urb);
476
477 /* Try to send shutdown message, if the device is gone, this will just fail. */
478 transfer_buffer = kmalloc (0x12, GFP_KERNEL);
479 if (transfer_buffer) {
480 usb_control_msg (port->serial->dev,
481 usb_rcvctrlpipe(port->serial->dev, 0),
482 VISOR_CLOSE_NOTIFICATION, 0xc2,
483 0x0000, 0x0000,
484 transfer_buffer, 0x12, 300);
485 kfree (transfer_buffer);
486 }
487
488 if (stats)
489 dev_info(&port->dev, "Bytes In = %d Bytes Out = %d\n",
490 priv->bytes_in, priv->bytes_out);
491 }
492
493
494 static int visor_write (struct usb_serial_port *port, const unsigned char *buf, int count)
495 {
496 struct visor_private *priv = usb_get_serial_port_data(port);
497 struct usb_serial *serial = port->serial;
498 struct urb *urb;
499 unsigned char *buffer;
500 unsigned long flags;
501 int status;
502
503 dbg("%s - port %d", __FUNCTION__, port->number);
504
505 spin_lock_irqsave(&priv->lock, flags);
506 if (priv->outstanding_urbs > URB_UPPER_LIMIT) {
507 spin_unlock_irqrestore(&priv->lock, flags);
508 dbg("%s - write limit hit\n", __FUNCTION__);
509 return 0;
510 }
511 spin_unlock_irqrestore(&priv->lock, flags);
512
513 buffer = kmalloc (count, GFP_ATOMIC);
514 if (!buffer) {
515 dev_err(&port->dev, "out of memory\n");
516 return -ENOMEM;
517 }
518
519 urb = usb_alloc_urb(0, GFP_ATOMIC);
520 if (!urb) {
521 dev_err(&port->dev, "no more free urbs\n");
522 kfree (buffer);
523 return -ENOMEM;
524 }
525
526 memcpy (buffer, buf, count);
527
528 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, buffer);
529
530 usb_fill_bulk_urb (urb, serial->dev,
531 usb_sndbulkpipe (serial->dev,
532 port->bulk_out_endpointAddress),
533 buffer, count,
534 visor_write_bulk_callback, port);
535
536 /* send it down the pipe */
537 status = usb_submit_urb(urb, GFP_ATOMIC);
538 if (status) {
539 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed with status = %d\n",
540 __FUNCTION__, status);
541 count = status;
542 kfree (buffer);
543 } else {
544 spin_lock_irqsave(&priv->lock, flags);
545 ++priv->outstanding_urbs;
546 priv->bytes_out += count;
547 spin_unlock_irqrestore(&priv->lock, flags);
548 }
549
550 /* we are done with this urb, so let the host driver
551 * really free it when it is finished with it */
552 usb_free_urb (urb);
553
554 return count;
555 }
556
557
558 static int visor_write_room (struct usb_serial_port *port)
559 {
560 dbg("%s - port %d", __FUNCTION__, port->number);
561
562 /*
563 * We really can take anything the user throws at us
564 * but let's pick a nice big number to tell the tty
565 * layer that we have lots of free space
566 */
567 return 2048;
568 }
569
570
571 static int visor_chars_in_buffer (struct usb_serial_port *port)
572 {
573 dbg("%s - port %d", __FUNCTION__, port->number);
574
575 /*
576 * We can't really account for how much data we
577 * have sent out, but hasn't made it through to the
578 * device, so just tell the tty layer that everything
579 * is flushed.
580 */
581 return 0;
582 }
583
584
585 static void visor_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
586 {
587 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
588 struct visor_private *priv = usb_get_serial_port_data(port);
589 unsigned long flags;
590
591 /* free up the transfer buffer, as usb_free_urb() does not do this */
592 kfree (urb->transfer_buffer);
593
594 dbg("%s - port %d", __FUNCTION__, port->number);
595
596 if (urb->status)
597 dbg("%s - nonzero write bulk status received: %d",
598 __FUNCTION__, urb->status);
599
600 spin_lock_irqsave(&priv->lock, flags);
601 --priv->outstanding_urbs;
602 spin_unlock_irqrestore(&priv->lock, flags);
603
604 schedule_work(&port->work);
605 }
606
607
608 static void visor_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
609 {
610 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
611 struct visor_private *priv = usb_get_serial_port_data(port);
612 unsigned char *data = urb->transfer_buffer;
613 struct tty_struct *tty;
614 unsigned long flags;
615 int i;
616 int throttled;
617 int result;
618
619 dbg("%s - port %d", __FUNCTION__, port->number);
620
621 if (urb->status) {
622 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
623 return;
624 }
625
626 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
627
628 tty = port->tty;
629 if (tty && urb->actual_length) {
630 for (i = 0; i < urb->actual_length ; ++i) {
631 /* if we insert more than TTY_FLIPBUF_SIZE characters, we drop them. */
632 if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
633 tty_flip_buffer_push(tty);
634 }
635 /* this doesn't actually push the data through unless tty->low_latency is set */
636 tty_insert_flip_char(tty, data[i], 0);
637 }
638 tty_flip_buffer_push(tty);
639 }
640 spin_lock_irqsave(&priv->lock, flags);
641 priv->bytes_in += urb->actual_length;
642 throttled = priv->throttled;
643 spin_unlock_irqrestore(&priv->lock, flags);
644
645 /* Continue trying to always read if we should */
646 if (!throttled) {
647 usb_fill_bulk_urb (port->read_urb, port->serial->dev,
648 usb_rcvbulkpipe(port->serial->dev,
649 port->bulk_in_endpointAddress),
650 port->read_urb->transfer_buffer,
651 port->read_urb->transfer_buffer_length,
652 visor_read_bulk_callback, port);
653 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
654 if (result)
655 dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
656 }
657 return;
658 }
659
660 static void visor_read_int_callback (struct urb *urb, struct pt_regs *regs)
661 {
662 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
663 int result;
664
665 switch (urb->status) {
666 case 0:
667 /* success */
668 break;
669 case -ECONNRESET:
670 case -ENOENT:
671 case -ESHUTDOWN:
672 /* this urb is terminated, clean up */
673 dbg("%s - urb shutting down with status: %d",
674 __FUNCTION__, urb->status);
675 return;
676 default:
677 dbg("%s - nonzero urb status received: %d",
678 __FUNCTION__, urb->status);
679 goto exit;
680 }
681
682 /*
683 * This information is still unknown what it can be used for.
684 * If anyone has an idea, please let the author know...
685 *
686 * Rumor has it this endpoint is used to notify when data
687 * is ready to be read from the bulk ones.
688 */
689 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
690 urb->actual_length, urb->transfer_buffer);
691
692 exit:
693 result = usb_submit_urb (urb, GFP_ATOMIC);
694 if (result)
695 dev_err(&urb->dev->dev, "%s - Error %d submitting interrupt urb\n",
696 __FUNCTION__, result);
697 }
698
699 static void visor_throttle (struct usb_serial_port *port)
700 {
701 struct visor_private *priv = usb_get_serial_port_data(port);
702 unsigned long flags;
703
704 dbg("%s - port %d", __FUNCTION__, port->number);
705 spin_lock_irqsave(&priv->lock, flags);
706 priv->throttled = 1;
707 spin_unlock_irqrestore(&priv->lock, flags);
708 }
709
710
711 static void visor_unthrottle (struct usb_serial_port *port)
712 {
713 struct visor_private *priv = usb_get_serial_port_data(port);
714 unsigned long flags;
715 int result;
716
717 dbg("%s - port %d", __FUNCTION__, port->number);
718 spin_lock_irqsave(&priv->lock, flags);
719 priv->throttled = 0;
720 spin_unlock_irqrestore(&priv->lock, flags);
721
722 port->read_urb->dev = port->serial->dev;
723 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
724 if (result)
725 dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
726 }
727
728 static int palm_os_3_probe (struct usb_serial *serial, const struct usb_device_id *id)
729 {
730 struct device *dev = &serial->dev->dev;
731 struct visor_connection_info *connection_info;
732 unsigned char *transfer_buffer;
733 char *string;
734 int retval = 0;
735 int i;
736 int num_ports = 0;
737
738 dbg("%s", __FUNCTION__);
739
740 transfer_buffer = kmalloc (sizeof (*connection_info), GFP_KERNEL);
741 if (!transfer_buffer) {
742 dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __FUNCTION__,
743 sizeof(*connection_info));
744 return -ENOMEM;
745 }
746
747 /* send a get connection info request */
748 retval = usb_control_msg (serial->dev,
749 usb_rcvctrlpipe(serial->dev, 0),
750 VISOR_GET_CONNECTION_INFORMATION,
751 0xc2, 0x0000, 0x0000, transfer_buffer,
752 sizeof(*connection_info), 300);
753 if (retval < 0) {
754 dev_err(dev, "%s - error %d getting connection information\n",
755 __FUNCTION__, retval);
756 goto exit;
757 }
758
759 if (retval == sizeof(*connection_info)) {
760 connection_info = (struct visor_connection_info *)transfer_buffer;
761
762 num_ports = le16_to_cpu(connection_info->num_ports);
763 for (i = 0; i < num_ports; ++i) {
764 switch (connection_info->connections[i].port_function_id) {
765 case VISOR_FUNCTION_GENERIC:
766 string = "Generic";
767 break;
768 case VISOR_FUNCTION_DEBUGGER:
769 string = "Debugger";
770 break;
771 case VISOR_FUNCTION_HOTSYNC:
772 string = "HotSync";
773 break;
774 case VISOR_FUNCTION_CONSOLE:
775 string = "Console";
776 break;
777 case VISOR_FUNCTION_REMOTE_FILE_SYS:
778 string = "Remote File System";
779 break;
780 default:
781 string = "unknown";
782 break;
783 }
784 dev_info(dev, "%s: port %d, is for %s use\n",
785 serial->type->name,
786 connection_info->connections[i].port, string);
787 }
788 }
789 /*
790 * Handle devices that report invalid stuff here.
791 */
792 if (num_ports == 0 || num_ports > 2) {
793 dev_warn (dev, "%s: No valid connect info available\n",
794 serial->type->name);
795 num_ports = 2;
796 }
797
798 dev_info(dev, "%s: Number of ports: %d\n", serial->type->name,
799 num_ports);
800
801 /*
802 * save off our num_ports info so that we can use it in the
803 * calc_num_ports callback
804 */
805 usb_set_serial_data(serial, (void *)(long)num_ports);
806
807 /* ask for the number of bytes available, but ignore the response as it is broken */
808 retval = usb_control_msg (serial->dev,
809 usb_rcvctrlpipe(serial->dev, 0),
810 VISOR_REQUEST_BYTES_AVAILABLE,
811 0xc2, 0x0000, 0x0005, transfer_buffer,
812 0x02, 300);
813 if (retval < 0)
814 dev_err(dev, "%s - error %d getting bytes available request\n",
815 __FUNCTION__, retval);
816 retval = 0;
817
818 exit:
819 kfree (transfer_buffer);
820
821 return retval;
822 }
823
824 static int palm_os_4_probe (struct usb_serial *serial, const struct usb_device_id *id)
825 {
826 struct device *dev = &serial->dev->dev;
827 struct palm_ext_connection_info *connection_info;
828 unsigned char *transfer_buffer;
829 int retval;
830
831 dbg("%s", __FUNCTION__);
832
833 transfer_buffer = kmalloc (sizeof (*connection_info), GFP_KERNEL);
834 if (!transfer_buffer) {
835 dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __FUNCTION__,
836 sizeof(*connection_info));
837 return -ENOMEM;
838 }
839
840 retval = usb_control_msg (serial->dev,
841 usb_rcvctrlpipe(serial->dev, 0),
842 PALM_GET_EXT_CONNECTION_INFORMATION,
843 0xc2, 0x0000, 0x0000, transfer_buffer,
844 sizeof (*connection_info), 300);
845 if (retval < 0)
846 dev_err(dev, "%s - error %d getting connection info\n",
847 __FUNCTION__, retval);
848 else
849 usb_serial_debug_data(debug, &serial->dev->dev, __FUNCTION__,
850 retval, transfer_buffer);
851
852 kfree (transfer_buffer);
853 return 0;
854 }
855
856
857 static int visor_probe (struct usb_serial *serial, const struct usb_device_id *id)
858 {
859 int retval = 0;
860 int (*startup) (struct usb_serial *serial, const struct usb_device_id *id);
861
862 dbg("%s", __FUNCTION__);
863
864 if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
865 err("active config #%d != 1 ??",
866 serial->dev->actconfig->desc.bConfigurationValue);
867 return -ENODEV;
868 }
869
870 if (id->driver_info) {
871 startup = (void *)id->driver_info;
872 retval = startup(serial, id);
873 }
874
875 return retval;
876 }
877
878 static int visor_calc_num_ports (struct usb_serial *serial)
879 {
880 int num_ports = (int)(long)(usb_get_serial_data(serial));
881
882 if (num_ports)
883 usb_set_serial_data(serial, NULL);
884
885 return num_ports;
886 }
887
888 static int generic_startup(struct usb_serial *serial)
889 {
890 struct visor_private *priv;
891 int i;
892
893 for (i = 0; i < serial->num_ports; ++i) {
894 priv = kmalloc (sizeof(*priv), GFP_KERNEL);
895 if (!priv)
896 return -ENOMEM;
897 memset (priv, 0x00, sizeof(*priv));
898 spin_lock_init(&priv->lock);
899 usb_set_serial_port_data(serial->port[i], priv);
900 }
901 return 0;
902 }
903
904 static int clie_3_5_startup (struct usb_serial *serial)
905 {
906 struct device *dev = &serial->dev->dev;
907 int result;
908 u8 data;
909
910 dbg("%s", __FUNCTION__);
911
912 /*
913 * Note that PEG-300 series devices expect the following two calls.
914 */
915
916 /* get the config number */
917 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0),
918 USB_REQ_GET_CONFIGURATION, USB_DIR_IN,
919 0, 0, &data, 1, 3000);
920 if (result < 0) {
921 dev_err(dev, "%s: get config number failed: %d\n", __FUNCTION__, result);
922 return result;
923 }
924 if (result != 1) {
925 dev_err(dev, "%s: get config number bad return length: %d\n", __FUNCTION__, result);
926 return -EIO;
927 }
928
929 /* get the interface number */
930 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0),
931 USB_REQ_GET_INTERFACE,
932 USB_DIR_IN | USB_RECIP_INTERFACE,
933 0, 0, &data, 1, 3000);
934 if (result < 0) {
935 dev_err(dev, "%s: get interface number failed: %d\n", __FUNCTION__, result);
936 return result;
937 }
938 if (result != 1) {
939 dev_err(dev, "%s: get interface number bad return length: %d\n", __FUNCTION__, result);
940 return -EIO;
941 }
942
943 return generic_startup(serial);
944 }
945
946 static int treo_attach (struct usb_serial *serial)
947 {
948 struct usb_serial_port *swap_port;
949
950 /* Only do this endpoint hack for the Handspring devices with
951 * interrupt in endpoints, which for now are the Treo devices. */
952 if (!((le16_to_cpu(serial->dev->descriptor.idVendor) == HANDSPRING_VENDOR_ID) ||
953 (le16_to_cpu(serial->dev->descriptor.idVendor) == KYOCERA_VENDOR_ID)) ||
954 (serial->num_interrupt_in == 0))
955 goto generic_startup;
956
957 dbg("%s", __FUNCTION__);
958
959 /*
960 * It appears that Treos and Kyoceras want to use the
961 * 1st bulk in endpoint to communicate with the 2nd bulk out endpoint,
962 * so let's swap the 1st and 2nd bulk in and interrupt endpoints.
963 * Note that swapping the bulk out endpoints would break lots of
964 * apps that want to communicate on the second port.
965 */
966 #define COPY_PORT(dest, src) \
967 dest->read_urb = src->read_urb; \
968 dest->bulk_in_endpointAddress = src->bulk_in_endpointAddress; \
969 dest->bulk_in_buffer = src->bulk_in_buffer; \
970 dest->interrupt_in_urb = src->interrupt_in_urb; \
971 dest->interrupt_in_endpointAddress = src->interrupt_in_endpointAddress; \
972 dest->interrupt_in_buffer = src->interrupt_in_buffer;
973
974 swap_port = kmalloc(sizeof(*swap_port), GFP_KERNEL);
975 if (!swap_port)
976 return -ENOMEM;
977 COPY_PORT(swap_port, serial->port[0]);
978 COPY_PORT(serial->port[0], serial->port[1]);
979 COPY_PORT(serial->port[1], swap_port);
980 kfree(swap_port);
981
982 generic_startup:
983 return generic_startup(serial);
984 }
985
986 static int clie_5_attach (struct usb_serial *serial)
987 {
988 dbg("%s", __FUNCTION__);
989
990 /* TH55 registers 2 ports.
991 Communication in from the UX50/TH55 uses bulk_in_endpointAddress from port 0
992 Communication out to the UX50/TH55 uses bulk_out_endpointAddress from port 1
993
994 Lets do a quick and dirty mapping
995 */
996
997 /* some sanity check */
998 if (serial->num_ports < 2)
999 return -1;
1000
1001 /* port 0 now uses the modified endpoint Address */
1002 serial->port[0]->bulk_out_endpointAddress = serial->port[1]->bulk_out_endpointAddress;
1003
1004 return generic_startup(serial);
1005 }
1006
1007 static void visor_shutdown (struct usb_serial *serial)
1008 {
1009 dbg("%s", __FUNCTION__);
1010 }
1011
1012 static int visor_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
1013 {
1014 dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
1015
1016 return -ENOIOCTLCMD;
1017 }
1018
1019
1020 /* This function is all nice and good, but we don't change anything based on it :) */
1021 static void visor_set_termios (struct usb_serial_port *port, struct termios *old_termios)
1022 {
1023 unsigned int cflag;
1024
1025 dbg("%s - port %d", __FUNCTION__, port->number);
1026
1027 if ((!port->tty) || (!port->tty->termios)) {
1028 dbg("%s - no tty structures", __FUNCTION__);
1029 return;
1030 }
1031
1032 cflag = port->tty->termios->c_cflag;
1033 /* check that they really want us to change something */
1034 if (old_termios) {
1035 if ((cflag == old_termios->c_cflag) &&
1036 (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
1037 dbg("%s - nothing to change...", __FUNCTION__);
1038 return;
1039 }
1040 }
1041
1042 /* get the byte size */
1043 switch (cflag & CSIZE) {
1044 case CS5: dbg("%s - data bits = 5", __FUNCTION__); break;
1045 case CS6: dbg("%s - data bits = 6", __FUNCTION__); break;
1046 case CS7: dbg("%s - data bits = 7", __FUNCTION__); break;
1047 default:
1048 case CS8: dbg("%s - data bits = 8", __FUNCTION__); break;
1049 }
1050
1051 /* determine the parity */
1052 if (cflag & PARENB)
1053 if (cflag & PARODD)
1054 dbg("%s - parity = odd", __FUNCTION__);
1055 else
1056 dbg("%s - parity = even", __FUNCTION__);
1057 else
1058 dbg("%s - parity = none", __FUNCTION__);
1059
1060 /* figure out the stop bits requested */
1061 if (cflag & CSTOPB)
1062 dbg("%s - stop bits = 2", __FUNCTION__);
1063 else
1064 dbg("%s - stop bits = 1", __FUNCTION__);
1065
1066
1067 /* figure out the flow control settings */
1068 if (cflag & CRTSCTS)
1069 dbg("%s - RTS/CTS is enabled", __FUNCTION__);
1070 else
1071 dbg("%s - RTS/CTS is disabled", __FUNCTION__);
1072
1073 /* determine software flow control */
1074 if (I_IXOFF(port->tty))
1075 dbg("%s - XON/XOFF is enabled, XON = %2x, XOFF = %2x",
1076 __FUNCTION__, START_CHAR(port->tty), STOP_CHAR(port->tty));
1077 else
1078 dbg("%s - XON/XOFF is disabled", __FUNCTION__);
1079
1080 /* get the baud rate wanted */
1081 dbg("%s - baud rate = %d", __FUNCTION__, tty_get_baud_rate(port->tty));
1082
1083 return;
1084 }
1085
1086
1087 static int __init visor_init (void)
1088 {
1089 int i, retval;
1090 /* Only if parameters were passed to us */
1091 if ((vendor>0) && (product>0)) {
1092 struct usb_device_id usb_dev_temp[]=
1093 {{USB_DEVICE(vendor, product),
1094 .driver_info = (kernel_ulong_t)&palm_os_4_probe }};
1095
1096 /* Find the last entry in id_table */
1097 for (i=0; ; i++) {
1098 if (id_table[i].idVendor==0) {
1099 id_table[i] = usb_dev_temp[0];
1100 break;
1101 }
1102 }
1103 /* Find the last entry in id_table_combined */
1104 for (i=0; ; i++) {
1105 if (id_table_combined[i].idVendor==0) {
1106 id_table_combined[i] = usb_dev_temp[0];
1107 break;
1108 }
1109 }
1110 info("Untested USB device specified at time of module insertion");
1111 info("Warning: This is not guaranteed to work");
1112 info("Using a newer kernel is preferred to this method");
1113 info("Adding Palm OS protocol 4.x support for unknown device: 0x%x/0x%x",
1114 vendor, product);
1115 }
1116 retval = usb_serial_register(&handspring_device);
1117 if (retval)
1118 goto failed_handspring_register;
1119 retval = usb_serial_register(&clie_3_5_device);
1120 if (retval)
1121 goto failed_clie_3_5_register;
1122 retval = usb_serial_register(&clie_5_device);
1123 if (retval)
1124 goto failed_clie_5_register;
1125 retval = usb_register(&visor_driver);
1126 if (retval)
1127 goto failed_usb_register;
1128 info(DRIVER_DESC " " DRIVER_VERSION);
1129
1130 return 0;
1131 failed_usb_register:
1132 usb_serial_deregister(&clie_5_device);
1133 failed_clie_5_register:
1134 usb_serial_deregister(&clie_3_5_device);
1135 failed_clie_3_5_register:
1136 usb_serial_deregister(&handspring_device);
1137 failed_handspring_register:
1138 return retval;
1139 }
1140
1141
1142 static void __exit visor_exit (void)
1143 {
1144 usb_deregister (&visor_driver);
1145 usb_serial_deregister (&handspring_device);
1146 usb_serial_deregister (&clie_3_5_device);
1147 usb_serial_deregister (&clie_5_device);
1148 }
1149
1150
1151 module_init(visor_init);
1152 module_exit(visor_exit);
1153
1154 MODULE_AUTHOR( DRIVER_AUTHOR );
1155 MODULE_DESCRIPTION( DRIVER_DESC );
1156 MODULE_LICENSE("GPL");
1157
1158 module_param(debug, bool, S_IRUGO | S_IWUSR);
1159 MODULE_PARM_DESC(debug, "Debug enabled or not");
1160 module_param(stats, bool, S_IRUGO | S_IWUSR);
1161 MODULE_PARM_DESC(stats, "Enables statistics or not");
1162
1163 module_param(vendor, ushort, 0);
1164 MODULE_PARM_DESC(vendor, "User specified vendor ID");
1165 module_param(product, ushort, 0);
1166 MODULE_PARM_DESC(product, "User specified product ID");
1167
Verdex Pro support