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PM: OMAP3: Removed a couple of unused variables from DVFS code
[linux-ginger.git] / drivers / usb / serial / visor.c
blobad1f9232292d264506b16cb5b5bd8a625dc2e88d
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
9 * modify it under the terms of the GNU General Public License version
10 * 2 as published by the Free Software Foundation.
11 *
12 * See Documentation/usb/usb-serial.txt for more information on using this
13 * driver
14 *
15 */
16
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>
27 #include <linux/uaccess.h>
28 #include <linux/usb.h>
29 #include <linux/usb/serial.h>
30 #include "visor.h"
31
32 /*
33 * Version Information
34 */
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 */
39 static int visor_open(struct tty_struct *tty, struct usb_serial_port *port);
40 static void visor_close(struct usb_serial_port *port);
41 static int visor_write(struct tty_struct *tty, struct usb_serial_port *port,
42 const unsigned char *buf, int count);
43 static int visor_write_room(struct tty_struct *tty);
44 static void visor_throttle(struct tty_struct *tty);
45 static void visor_unthrottle(struct tty_struct *tty);
46 static int visor_probe(struct usb_serial *serial,
47 const struct usb_device_id *id);
48 static int visor_calc_num_ports(struct usb_serial *serial);
49 static void visor_release(struct usb_serial *serial);
50 static void visor_write_bulk_callback(struct urb *urb);
51 static void visor_read_bulk_callback(struct urb *urb);
52 static void visor_read_int_callback(struct urb *urb);
53 static int clie_3_5_startup(struct usb_serial *serial);
54 static int treo_attach(struct usb_serial *serial);
55 static int clie_5_attach(struct usb_serial *serial);
56 static int palm_os_3_probe(struct usb_serial *serial,
57 const struct usb_device_id *id);
58 static int palm_os_4_probe(struct usb_serial *serial,
59 const struct usb_device_id *id);
60
61 /* Parameters that may be passed into the module. */
62 static int debug;
63 static __u16 vendor;
64 static __u16 product;
65
66 static 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 },
73 { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID),
74 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
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 },
91 { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650),
92 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
93 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID),
94 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
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 },
109 { USB_DEVICE(ACER_VENDOR_ID, ACER_S10_ID),
110 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
111 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID),
112 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
113 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID),
114 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
115 { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID),
116 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
117 { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID),
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
129 static 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
136 static 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
141 static 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) },
145 { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID) },
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) },
154 { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650) },
155 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID) },
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) },
167 { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID) },
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
176 MODULE_DEVICE_TABLE(usb, id_table_combined);
177
178 static struct usb_driver visor_driver = {
179 .name = "visor",
180 .probe = usb_serial_probe,
181 .disconnect = usb_serial_disconnect,
182 .id_table = id_table_combined,
183 .no_dynamic_id = 1,
184 };
185
186 /* All of the device info needed for the Handspring Visor,
187 and Palm 4.0 devices */
188 static struct usb_serial_driver handspring_device = {
189 .driver = {
190 .owner = THIS_MODULE,
191 .name = "visor",
192 },
193 .description = "Handspring Visor / Palm OS",
194 .usb_driver = &visor_driver,
195 .id_table = id_table,
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,
204 .release = visor_release,
205 .write = visor_write,
206 .write_room = visor_write_room,
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 */
213 static struct usb_serial_driver clie_5_device = {
214 .driver = {
215 .owner = THIS_MODULE,
216 .name = "clie_5",
217 },
218 .description = "Sony Clie 5.0",
219 .usb_driver = &visor_driver,
220 .id_table = clie_id_5_table,
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,
229 .release = visor_release,
230 .write = visor_write,
231 .write_room = visor_write_room,
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 */
238 static struct usb_serial_driver clie_3_5_device = {
239 .driver = {
240 .owner = THIS_MODULE,
241 .name = "clie_3.5",
242 },
243 .description = "Sony Clie 3.5",
244 .usb_driver = &visor_driver,
245 .id_table = clie_id_3_5_table,
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,
252 .write = visor_write,
253 .write_room = visor_write_room,
254 .write_bulk_callback = visor_write_bulk_callback,
255 .read_bulk_callback = visor_read_bulk_callback,
256 };
257
258 struct visor_private {
259 spinlock_t lock;
260 int bytes_in;
261 int bytes_out;
262 int outstanding_urbs;
263 unsigned char throttled;
264 unsigned char actually_throttled;
265 };
266
267 /* number of outstanding urbs to prevent userspace DoS from happening */
268 #define URB_UPPER_LIMIT 42
269
270 static int stats;
271
272 /******************************************************************************
273 * Handspring Visor specific driver functions
274 ******************************************************************************/
275 static int visor_open(struct tty_struct *tty, struct usb_serial_port *port)
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
282 dbg("%s - port %d", __func__, port->number);
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;
293 priv->throttled = 0;
294 spin_unlock_irqrestore(&priv->lock, flags);
295
296 /* Start reading from the device */
297 usb_fill_bulk_urb(port->read_urb, serial->dev,
298 usb_rcvbulkpipe(serial->dev,
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) {
305 dev_err(&port->dev,
306 "%s - failed submitting read urb, error %d\n",
307 __func__, result);
308 goto exit;
309 }
310
311 if (port->interrupt_in_urb) {
312 dbg("%s - adding interrupt input for treo", __func__);
313 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
314 if (result)
315 dev_err(&port->dev,
316 "%s - failed submitting interrupt urb, error %d\n",
317 __func__, result);
318 }
319 exit:
320 return result;
321 }
322
323
324 static void visor_close(struct usb_serial_port *port)
325 {
326 struct visor_private *priv = usb_get_serial_port_data(port);
327 unsigned char *transfer_buffer;
328
329 dbg("%s - port %d", __func__, port->number);
330
331 /* shutdown our urbs */
332 usb_kill_urb(port->read_urb);
333 usb_kill_urb(port->interrupt_in_urb);
334
335 mutex_lock(&port->serial->disc_mutex);
336 if (!port->serial->disconnected) {
337 /* Try to send shutdown message, unless the device is gone */
338 transfer_buffer = kmalloc(0x12, GFP_KERNEL);
339 if (transfer_buffer) {
340 usb_control_msg(port->serial->dev,
341 usb_rcvctrlpipe(port->serial->dev, 0),
342 VISOR_CLOSE_NOTIFICATION, 0xc2,
343 0x0000, 0x0000,
344 transfer_buffer, 0x12, 300);
345 kfree(transfer_buffer);
346 }
347 }
348 mutex_unlock(&port->serial->disc_mutex);
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
356 static int visor_write(struct tty_struct *tty, struct usb_serial_port *port,
357 const unsigned char *buf, int count)
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
366 dbg("%s - port %d", __func__, port->number);
367
368 spin_lock_irqsave(&priv->lock, flags);
369 if (priv->outstanding_urbs > URB_UPPER_LIMIT) {
370 spin_unlock_irqrestore(&priv->lock, flags);
371 dbg("%s - write limit hit\n", __func__);
372 return 0;
373 }
374 priv->outstanding_urbs++;
375 spin_unlock_irqrestore(&priv->lock, flags);
376
377 buffer = kmalloc(count, GFP_ATOMIC);
378 if (!buffer) {
379 dev_err(&port->dev, "out of memory\n");
380 count = -ENOMEM;
381 goto error_no_buffer;
382 }
383
384 urb = usb_alloc_urb(0, GFP_ATOMIC);
385 if (!urb) {
386 dev_err(&port->dev, "no more free urbs\n");
387 count = -ENOMEM;
388 goto error_no_urb;
389 }
390
391 memcpy(buffer, buf, count);
392
393 usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
394
395 usb_fill_bulk_urb(urb, serial->dev,
396 usb_sndbulkpipe(serial->dev,
397 port->bulk_out_endpointAddress),
398 buffer, count,
399 visor_write_bulk_callback, port);
400
401 /* send it down the pipe */
402 status = usb_submit_urb(urb, GFP_ATOMIC);
403 if (status) {
404 dev_err(&port->dev,
405 "%s - usb_submit_urb(write bulk) failed with status = %d\n",
406 __func__, status);
407 count = status;
408 goto error;
409 } else {
410 spin_lock_irqsave(&priv->lock, flags);
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 */
417 usb_free_urb(urb);
418
419 return count;
420 error:
421 usb_free_urb(urb);
422 error_no_urb:
423 kfree(buffer);
424 error_no_buffer:
425 spin_lock_irqsave(&priv->lock, flags);
426 --priv->outstanding_urbs;
427 spin_unlock_irqrestore(&priv->lock, flags);
428 return count;
429 }
430
431
432 static int visor_write_room(struct tty_struct *tty)
433 {
434 struct usb_serial_port *port = tty->driver_data;
435 struct visor_private *priv = usb_get_serial_port_data(port);
436 unsigned long flags;
437
438 dbg("%s - port %d", __func__, port->number);
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
443 * layer that we have lots of free space, unless we don't.
444 */
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);
449 dbg("%s - write limit hit\n", __func__);
450 return 0;
451 }
452 spin_unlock_irqrestore(&priv->lock, flags);
453
454 return 2048;
455 }
456
457
458 static void visor_write_bulk_callback(struct urb *urb)
459 {
460 struct usb_serial_port *port = urb->context;
461 struct visor_private *priv = usb_get_serial_port_data(port);
462 int status = urb->status;
463 unsigned long flags;
464
465 /* free up the transfer buffer, as usb_free_urb() does not do this */
466 kfree(urb->transfer_buffer);
467
468 dbg("%s - port %d", __func__, port->number);
469
470 if (status)
471 dbg("%s - nonzero write bulk status received: %d",
472 __func__, status);
473
474 spin_lock_irqsave(&priv->lock, flags);
475 --priv->outstanding_urbs;
476 spin_unlock_irqrestore(&priv->lock, flags);
477
478 usb_serial_port_softint(port);
479 }
480
481
482 static void visor_read_bulk_callback(struct urb *urb)
483 {
484 struct usb_serial_port *port = urb->context;
485 struct visor_private *priv = usb_get_serial_port_data(port);
486 unsigned char *data = urb->transfer_buffer;
487 int status = urb->status;
488 struct tty_struct *tty;
489 int result;
490 int available_room = 0;
491
492 dbg("%s - port %d", __func__, port->number);
493
494 if (status) {
495 dbg("%s - nonzero read bulk status received: %d",
496 __func__, status);
497 return;
498 }
499
500 usb_serial_debug_data(debug, &port->dev, __func__,
501 urb->actual_length, data);
502
503 if (urb->actual_length) {
504 tty = tty_port_tty_get(&port->port);
505 if (tty) {
506 available_room = tty_buffer_request_room(tty,
507 urb->actual_length);
508 if (available_room) {
509 tty_insert_flip_string(tty, data,
510 available_room);
511 tty_flip_buffer_push(tty);
512 }
513 tty_kref_put(tty);
514 }
515 spin_lock(&priv->lock);
516 if (tty)
517 priv->bytes_in += available_room;
518
519 } else {
520 spin_lock(&priv->lock);
521 }
522
523 /* Continue trying to always read if we should */
524 if (!priv->throttled) {
525 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
526 usb_rcvbulkpipe(port->serial->dev,
527 port->bulk_in_endpointAddress),
528 port->read_urb->transfer_buffer,
529 port->read_urb->transfer_buffer_length,
530 visor_read_bulk_callback, port);
531 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
532 if (result)
533 dev_err(&port->dev,
534 "%s - failed resubmitting read urb, error %d\n",
535 __func__, result);
536 } else
537 priv->actually_throttled = 1;
538 spin_unlock(&priv->lock);
539 }
540
541 static void visor_read_int_callback(struct urb *urb)
542 {
543 struct usb_serial_port *port = urb->context;
544 int status = urb->status;
545 int result;
546
547 switch (status) {
548 case 0:
549 /* success */
550 break;
551 case -ECONNRESET:
552 case -ENOENT:
553 case -ESHUTDOWN:
554 /* this urb is terminated, clean up */
555 dbg("%s - urb shutting down with status: %d",
556 __func__, status);
557 return;
558 default:
559 dbg("%s - nonzero urb status received: %d",
560 __func__, status);
561 goto exit;
562 }
563
564 /*
565 * This information is still unknown what it can be used for.
566 * If anyone has an idea, please let the author know...
567 *
568 * Rumor has it this endpoint is used to notify when data
569 * is ready to be read from the bulk ones.
570 */
571 usb_serial_debug_data(debug, &port->dev, __func__,
572 urb->actual_length, urb->transfer_buffer);
573
574 exit:
575 result = usb_submit_urb(urb, GFP_ATOMIC);
576 if (result)
577 dev_err(&urb->dev->dev,
578 "%s - Error %d submitting interrupt urb\n",
579 __func__, result);
580 }
581
582 static void visor_throttle(struct tty_struct *tty)
583 {
584 struct usb_serial_port *port = tty->driver_data;
585 struct visor_private *priv = usb_get_serial_port_data(port);
586
587 dbg("%s - port %d", __func__, port->number);
588 spin_lock_irq(&priv->lock);
589 priv->throttled = 1;
590 spin_unlock_irq(&priv->lock);
591 }
592
593
594 static void visor_unthrottle(struct tty_struct *tty)
595 {
596 struct usb_serial_port *port = tty->driver_data;
597 struct visor_private *priv = usb_get_serial_port_data(port);
598 int result, was_throttled;
599
600 dbg("%s - port %d", __func__, port->number);
601 spin_lock_irq(&priv->lock);
602 priv->throttled = 0;
603 was_throttled = priv->actually_throttled;
604 priv->actually_throttled = 0;
605 spin_unlock_irq(&priv->lock);
606
607 if (was_throttled) {
608 port->read_urb->dev = port->serial->dev;
609 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
610 if (result)
611 dev_err(&port->dev,
612 "%s - failed submitting read urb, error %d\n",
613 __func__, result);
614 }
615 }
616
617 static int palm_os_3_probe(struct usb_serial *serial,
618 const struct usb_device_id *id)
619 {
620 struct device *dev = &serial->dev->dev;
621 struct visor_connection_info *connection_info;
622 unsigned char *transfer_buffer;
623 char *string;
624 int retval = 0;
625 int i;
626 int num_ports = 0;
627
628 dbg("%s", __func__);
629
630 transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL);
631 if (!transfer_buffer) {
632 dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __func__,
633 sizeof(*connection_info));
634 return -ENOMEM;
635 }
636
637 /* send a get connection info request */
638 retval = usb_control_msg(serial->dev,
639 usb_rcvctrlpipe(serial->dev, 0),
640 VISOR_GET_CONNECTION_INFORMATION,
641 0xc2, 0x0000, 0x0000, transfer_buffer,
642 sizeof(*connection_info), 300);
643 if (retval < 0) {
644 dev_err(dev, "%s - error %d getting connection information\n",
645 __func__, retval);
646 goto exit;
647 }
648
649 if (retval == sizeof(*connection_info)) {
650 connection_info = (struct visor_connection_info *)
651 transfer_buffer;
652
653 num_ports = le16_to_cpu(connection_info->num_ports);
654 for (i = 0; i < num_ports; ++i) {
655 switch (
656 connection_info->connections[i].port_function_id) {
657 case VISOR_FUNCTION_GENERIC:
658 string = "Generic";
659 break;
660 case VISOR_FUNCTION_DEBUGGER:
661 string = "Debugger";
662 break;
663 case VISOR_FUNCTION_HOTSYNC:
664 string = "HotSync";
665 break;
666 case VISOR_FUNCTION_CONSOLE:
667 string = "Console";
668 break;
669 case VISOR_FUNCTION_REMOTE_FILE_SYS:
670 string = "Remote File System";
671 break;
672 default:
673 string = "unknown";
674 break;
675 }
676 dev_info(dev, "%s: port %d, is for %s use\n",
677 serial->type->description,
678 connection_info->connections[i].port, string);
679 }
680 }
681 /*
682 * Handle devices that report invalid stuff here.
683 */
684 if (num_ports == 0 || num_ports > 2) {
685 dev_warn(dev, "%s: No valid connect info available\n",
686 serial->type->description);
687 num_ports = 2;
688 }
689
690 dev_info(dev, "%s: Number of ports: %d\n", serial->type->description,
691 num_ports);
692
693 /*
694 * save off our num_ports info so that we can use it in the
695 * calc_num_ports callback
696 */
697 usb_set_serial_data(serial, (void *)(long)num_ports);
698
699 /* ask for the number of bytes available, but ignore the
700 response as it is broken */
701 retval = usb_control_msg(serial->dev,
702 usb_rcvctrlpipe(serial->dev, 0),
703 VISOR_REQUEST_BYTES_AVAILABLE,
704 0xc2, 0x0000, 0x0005, transfer_buffer,
705 0x02, 300);
706 if (retval < 0)
707 dev_err(dev, "%s - error %d getting bytes available request\n",
708 __func__, retval);
709 retval = 0;
710
711 exit:
712 kfree(transfer_buffer);
713
714 return retval;
715 }
716
717 static int palm_os_4_probe(struct usb_serial *serial,
718 const struct usb_device_id *id)
719 {
720 struct device *dev = &serial->dev->dev;
721 struct palm_ext_connection_info *connection_info;
722 unsigned char *transfer_buffer;
723 int retval;
724
725 dbg("%s", __func__);
726
727 transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL);
728 if (!transfer_buffer) {
729 dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __func__,
730 sizeof(*connection_info));
731 return -ENOMEM;
732 }
733
734 retval = usb_control_msg(serial->dev,
735 usb_rcvctrlpipe(serial->dev, 0),
736 PALM_GET_EXT_CONNECTION_INFORMATION,
737 0xc2, 0x0000, 0x0000, transfer_buffer,
738 sizeof(*connection_info), 300);
739 if (retval < 0)
740 dev_err(dev, "%s - error %d getting connection info\n",
741 __func__, retval);
742 else
743 usb_serial_debug_data(debug, &serial->dev->dev, __func__,
744 retval, transfer_buffer);
745
746 kfree(transfer_buffer);
747 return 0;
748 }
749
750
751 static int visor_probe(struct usb_serial *serial,
752 const struct usb_device_id *id)
753 {
754 int retval = 0;
755 int (*startup)(struct usb_serial *serial,
756 const struct usb_device_id *id);
757
758 dbg("%s", __func__);
759
760 if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
761 dev_err(&serial->dev->dev, "active config #%d != 1 ??\n",
762 serial->dev->actconfig->desc.bConfigurationValue);
763 return -ENODEV;
764 }
765
766 if (id->driver_info) {
767 startup = (void *)id->driver_info;
768 retval = startup(serial, id);
769 }
770
771 return retval;
772 }
773
774 static int visor_calc_num_ports(struct usb_serial *serial)
775 {
776 int num_ports = (int)(long)(usb_get_serial_data(serial));
777
778 if (num_ports)
779 usb_set_serial_data(serial, NULL);
780
781 return num_ports;
782 }
783
784 static int generic_startup(struct usb_serial *serial)
785 {
786 struct usb_serial_port **ports = serial->port;
787 struct visor_private *priv;
788 int i;
789
790 for (i = 0; i < serial->num_ports; ++i) {
791 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
792 if (!priv) {
793 while (i-- != 0) {
794 priv = usb_get_serial_port_data(ports[i]);
795 usb_set_serial_port_data(ports[i], NULL);
796 kfree(priv);
797 }
798 return -ENOMEM;
799 }
800 spin_lock_init(&priv->lock);
801 usb_set_serial_port_data(ports[i], priv);
802 }
803 return 0;
804 }
805
806 static int clie_3_5_startup(struct usb_serial *serial)
807 {
808 struct device *dev = &serial->dev->dev;
809 int result;
810 u8 data;
811
812 dbg("%s", __func__);
813
814 /*
815 * Note that PEG-300 series devices expect the following two calls.
816 */
817
818 /* get the config number */
819 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
820 USB_REQ_GET_CONFIGURATION, USB_DIR_IN,
821 0, 0, &data, 1, 3000);
822 if (result < 0) {
823 dev_err(dev, "%s: get config number failed: %d\n",
824 __func__, result);
825 return result;
826 }
827 if (result != 1) {
828 dev_err(dev, "%s: get config number bad return length: %d\n",
829 __func__, result);
830 return -EIO;
831 }
832
833 /* get the interface number */
834 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
835 USB_REQ_GET_INTERFACE,
836 USB_DIR_IN | USB_RECIP_INTERFACE,
837 0, 0, &data, 1, 3000);
838 if (result < 0) {
839 dev_err(dev, "%s: get interface number failed: %d\n",
840 __func__, result);
841 return result;
842 }
843 if (result != 1) {
844 dev_err(dev,
845 "%s: get interface number bad return length: %d\n",
846 __func__, result);
847 return -EIO;
848 }
849
850 return generic_startup(serial);
851 }
852
853 static int treo_attach(struct usb_serial *serial)
854 {
855 struct usb_serial_port *swap_port;
856
857 /* Only do this endpoint hack for the Handspring devices with
858 * interrupt in endpoints, which for now are the Treo devices. */
859 if (!((le16_to_cpu(serial->dev->descriptor.idVendor)
860 == HANDSPRING_VENDOR_ID) ||
861 (le16_to_cpu(serial->dev->descriptor.idVendor)
862 == KYOCERA_VENDOR_ID)) ||
863 (serial->num_interrupt_in == 0))
864 goto generic_startup;
865
866 dbg("%s", __func__);
867
868 /*
869 * It appears that Treos and Kyoceras want to use the
870 * 1st bulk in endpoint to communicate with the 2nd bulk out endpoint,
871 * so let's swap the 1st and 2nd bulk in and interrupt endpoints.
872 * Note that swapping the bulk out endpoints would break lots of
873 * apps that want to communicate on the second port.
874 */
875 #define COPY_PORT(dest, src) \
876 do { \
877 dest->read_urb = src->read_urb; \
878 dest->bulk_in_endpointAddress = src->bulk_in_endpointAddress;\
879 dest->bulk_in_buffer = src->bulk_in_buffer; \
880 dest->interrupt_in_urb = src->interrupt_in_urb; \
881 dest->interrupt_in_endpointAddress = \
882 src->interrupt_in_endpointAddress;\
883 dest->interrupt_in_buffer = src->interrupt_in_buffer; \
884 } while (0);
885
886 swap_port = kmalloc(sizeof(*swap_port), GFP_KERNEL);
887 if (!swap_port)
888 return -ENOMEM;
889 COPY_PORT(swap_port, serial->port[0]);
890 COPY_PORT(serial->port[0], serial->port[1]);
891 COPY_PORT(serial->port[1], swap_port);
892 kfree(swap_port);
893
894 generic_startup:
895 return generic_startup(serial);
896 }
897
898 static int clie_5_attach(struct usb_serial *serial)
899 {
900 dbg("%s", __func__);
901
902 /* TH55 registers 2 ports.
903 Communication in from the UX50/TH55 uses bulk_in_endpointAddress
904 from port 0. Communication out to the UX50/TH55 uses
905 bulk_out_endpointAddress from port 1
906
907 Lets do a quick and dirty mapping
908 */
909
910 /* some sanity check */
911 if (serial->num_ports < 2)
912 return -1;
913
914 /* port 0 now uses the modified endpoint Address */
915 serial->port[0]->bulk_out_endpointAddress =
916 serial->port[1]->bulk_out_endpointAddress;
917
918 return generic_startup(serial);
919 }
920
921 static void visor_release(struct usb_serial *serial)
922 {
923 struct visor_private *priv;
924 int i;
925
926 dbg("%s", __func__);
927
928 for (i = 0; i < serial->num_ports; i++) {
929 priv = usb_get_serial_port_data(serial->port[i]);
930 kfree(priv);
931 }
932 }
933
934 static int __init visor_init(void)
935 {
936 int i, retval;
937 /* Only if parameters were passed to us */
938 if (vendor > 0 && product > 0) {
939 struct usb_device_id usb_dev_temp[] = {
940 {
941 USB_DEVICE(vendor, product),
942 .driver_info =
943 (kernel_ulong_t) &palm_os_4_probe
944 }
945 };
946
947 /* Find the last entry in id_table */
948 for (i = 0;; i++) {
949 if (id_table[i].idVendor == 0) {
950 id_table[i] = usb_dev_temp[0];
951 break;
952 }
953 }
954 /* Find the last entry in id_table_combined */
955 for (i = 0;; i++) {
956 if (id_table_combined[i].idVendor == 0) {
957 id_table_combined[i] = usb_dev_temp[0];
958 break;
959 }
960 }
961 printk(KERN_INFO KBUILD_MODNAME
962 ": Untested USB device specified at time of module insertion\n");
963 printk(KERN_INFO KBUILD_MODNAME
964 ": Warning: This is not guaranteed to work\n");
965 printk(KERN_INFO KBUILD_MODNAME
966 ": Using a newer kernel is preferred to this method\n");
967 printk(KERN_INFO KBUILD_MODNAME
968 ": Adding Palm OS protocol 4.x support for unknown device: 0x%x/0x%x\n",
969 vendor, product);
970 }
971 retval = usb_serial_register(&handspring_device);
972 if (retval)
973 goto failed_handspring_register;
974 retval = usb_serial_register(&clie_3_5_device);
975 if (retval)
976 goto failed_clie_3_5_register;
977 retval = usb_serial_register(&clie_5_device);
978 if (retval)
979 goto failed_clie_5_register;
980 retval = usb_register(&visor_driver);
981 if (retval)
982 goto failed_usb_register;
983 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
984
985 return 0;
986 failed_usb_register:
987 usb_serial_deregister(&clie_5_device);
988 failed_clie_5_register:
989 usb_serial_deregister(&clie_3_5_device);
990 failed_clie_3_5_register:
991 usb_serial_deregister(&handspring_device);
992 failed_handspring_register:
993 return retval;
994 }
995
996
997 static void __exit visor_exit (void)
998 {
999 usb_deregister(&visor_driver);
1000 usb_serial_deregister(&handspring_device);
1001 usb_serial_deregister(&clie_3_5_device);
1002 usb_serial_deregister(&clie_5_device);
1003 }
1004
1005
1006 module_init(visor_init);
1007 module_exit(visor_exit);
1008
1009 MODULE_AUTHOR(DRIVER_AUTHOR);
1010 MODULE_DESCRIPTION(DRIVER_DESC);
1011 MODULE_LICENSE("GPL");
1012
1013 module_param(debug, bool, S_IRUGO | S_IWUSR);
1014 MODULE_PARM_DESC(debug, "Debug enabled or not");
1015 module_param(stats, bool, S_IRUGO | S_IWUSR);
1016 MODULE_PARM_DESC(stats, "Enables statistics or not");
1017
1018 module_param(vendor, ushort, 0);
1019 MODULE_PARM_DESC(vendor, "User specified vendor ID");
1020 module_param(product, ushort, 0);
1021 MODULE_PARM_DESC(product, "User specified product ID");
1022
Linux for Ginger Game Console