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USB: option: termios handling
[linux-2.6/kvm.git] / drivers / usb / serial / option.c
blob4590124cf8883714377147949ff873bcf228f1a4
1 /*
2 USB Driver for GSM modems
3
4 Copyright (C) 2005 Matthias Urlichs <smurf@smurf.noris.de>
5
6 This driver is free software; you can redistribute it and/or modify
7 it under the terms of Version 2 of the GNU General Public License as
8 published by the Free Software Foundation.
9
10 Portions copied from the Keyspan driver by Hugh Blemings <hugh@blemings.org>
11
12 History: see the git log.
13
14 Work sponsored by: Sigos GmbH, Germany <info@sigos.de>
15
16 This driver exists because the "normal" serial driver doesn't work too well
17 with GSM modems. Issues:
18 - data loss -- one single Receive URB is not nearly enough
19 - nonstandard flow (Option devices) control
20 - controlling the baud rate doesn't make sense
21
22 This driver is named "option" because the most common device it's
23 used for is a PC-Card (with an internal OHCI-USB interface, behind
24 which the GSM interface sits), made by Option Inc.
25
26 Some of the "one port" devices actually exhibit multiple USB instances
27 on the USB bus. This is not a bug, these ports are used for different
28 device features.
29 */
30
31 #define DRIVER_VERSION "v0.7.1"
32 #define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
33 #define DRIVER_DESC "USB Driver for GSM modems"
34
35 #include <linux/kernel.h>
36 #include <linux/jiffies.h>
37 #include <linux/errno.h>
38 #include <linux/tty.h>
39 #include <linux/tty_flip.h>
40 #include <linux/module.h>
41 #include <linux/bitops.h>
42 #include <linux/usb.h>
43 #include <linux/usb/serial.h>
44
45 /* Function prototypes */
46 static int option_open(struct usb_serial_port *port, struct file *filp);
47 static void option_close(struct usb_serial_port *port, struct file *filp);
48 static int option_startup(struct usb_serial *serial);
49 static void option_shutdown(struct usb_serial *serial);
50 static void option_rx_throttle(struct usb_serial_port *port);
51 static void option_rx_unthrottle(struct usb_serial_port *port);
52 static int option_write_room(struct usb_serial_port *port);
53
54 static void option_instat_callback(struct urb *urb);
55
56 static int option_write(struct usb_serial_port *port,
57 const unsigned char *buf, int count);
58
59 static int option_chars_in_buffer(struct usb_serial_port *port);
60 static int option_ioctl(struct usb_serial_port *port, struct file *file,
61 unsigned int cmd, unsigned long arg);
62 static void option_set_termios(struct usb_serial_port *port,
63 struct ktermios *old);
64 static void option_break_ctl(struct usb_serial_port *port, int break_state);
65 static int option_tiocmget(struct usb_serial_port *port, struct file *file);
66 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
67 unsigned int set, unsigned int clear);
68 static int option_send_setup(struct usb_serial_port *port);
69
70 /* Vendor and product IDs */
71 #define OPTION_VENDOR_ID 0x0AF0
72 #define OPTION_PRODUCT_COLT 0x5000
73 #define OPTION_PRODUCT_RICOLA 0x6000
74 #define OPTION_PRODUCT_RICOLA_LIGHT 0x6100
75 #define OPTION_PRODUCT_RICOLA_QUAD 0x6200
76 #define OPTION_PRODUCT_RICOLA_QUAD_LIGHT 0x6300
77 #define OPTION_PRODUCT_RICOLA_NDIS 0x6050
78 #define OPTION_PRODUCT_RICOLA_NDIS_LIGHT 0x6150
79 #define OPTION_PRODUCT_RICOLA_NDIS_QUAD 0x6250
80 #define OPTION_PRODUCT_RICOLA_NDIS_QUAD_LIGHT 0x6350
81 #define OPTION_PRODUCT_COBRA 0x6500
82 #define OPTION_PRODUCT_COBRA_BUS 0x6501
83 #define OPTION_PRODUCT_VIPER 0x6600
84 #define OPTION_PRODUCT_VIPER_BUS 0x6601
85 #define OPTION_PRODUCT_GT_MAX_READY 0x6701
86 #define OPTION_PRODUCT_GT_MAX 0x6711
87 #define OPTION_PRODUCT_FUJI_MODEM_LIGHT 0x6721
88 #define OPTION_PRODUCT_FUJI_MODEM_GT 0x6741
89 #define OPTION_PRODUCT_FUJI_MODEM_EX 0x6761
90 #define OPTION_PRODUCT_FUJI_NETWORK_LIGHT 0x6731
91 #define OPTION_PRODUCT_FUJI_NETWORK_GT 0x6751
92 #define OPTION_PRODUCT_FUJI_NETWORK_EX 0x6771
93 #define OPTION_PRODUCT_KOI_MODEM 0x6800
94 #define OPTION_PRODUCT_KOI_NETWORK 0x6811
95 #define OPTION_PRODUCT_SCORPION_MODEM 0x6901
96 #define OPTION_PRODUCT_SCORPION_NETWORK 0x6911
97 #define OPTION_PRODUCT_ETNA_MODEM 0x7001
98 #define OPTION_PRODUCT_ETNA_NETWORK 0x7011
99 #define OPTION_PRODUCT_ETNA_MODEM_LITE 0x7021
100 #define OPTION_PRODUCT_ETNA_MODEM_GT 0x7041
101 #define OPTION_PRODUCT_ETNA_MODEM_EX 0x7061
102 #define OPTION_PRODUCT_ETNA_NETWORK_LITE 0x7031
103 #define OPTION_PRODUCT_ETNA_NETWORK_GT 0x7051
104 #define OPTION_PRODUCT_ETNA_NETWORK_EX 0x7071
105 #define OPTION_PRODUCT_ETNA_KOI_MODEM 0x7100
106 #define OPTION_PRODUCT_ETNA_KOI_NETWORK 0x7111
107
108 #define HUAWEI_VENDOR_ID 0x12D1
109 #define HUAWEI_PRODUCT_E600 0x1001
110 #define HUAWEI_PRODUCT_E220 0x1003
111 #define HUAWEI_PRODUCT_E220BIS 0x1004
112
113 #define NOVATELWIRELESS_VENDOR_ID 0x1410
114 #define DELL_VENDOR_ID 0x413C
115
116 #define ANYDATA_VENDOR_ID 0x16d5
117 #define ANYDATA_PRODUCT_ADU_E100A 0x6501
118 #define ANYDATA_PRODUCT_ADU_500A 0x6502
119
120 #define BANDRICH_VENDOR_ID 0x1A8D
121 #define BANDRICH_PRODUCT_C100_1 0x1002
122 #define BANDRICH_PRODUCT_C100_2 0x1003
123
124 static struct usb_device_id option_ids[] = {
125 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },
126 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA) },
127 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_LIGHT) },
128 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD) },
129 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD_LIGHT) },
130 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS) },
131 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_LIGHT) },
132 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_QUAD) },
133 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_QUAD_LIGHT) },
134 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA) },
135 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA_BUS) },
136 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_VIPER) },
137 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_VIPER_BUS) },
138 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_GT_MAX_READY) },
139 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_GT_MAX) },
140 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_LIGHT) },
141 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_GT) },
142 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_EX) },
143 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_LIGHT) },
144 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_GT) },
145 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_EX) },
146 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_KOI_MODEM) },
147 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_KOI_NETWORK) },
148 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_SCORPION_MODEM) },
149 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_SCORPION_NETWORK) },
150 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM) },
151 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK) },
152 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_LITE) },
153 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_GT) },
154 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_EX) },
155 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_LITE) },
156 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_GT) },
157 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_EX) },
158 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_KOI_MODEM) },
159 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_KOI_NETWORK) },
160 { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E600) },
161 { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E220) },
162 { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E220BIS) },
163 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1100) }, /* Novatel Merlin XS620/S640 */
164 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1110) }, /* Novatel Merlin S620 */
165 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1120) }, /* Novatel Merlin EX720 */
166 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1130) }, /* Novatel Merlin S720 */
167 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1400) }, /* Novatel U730 */
168 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1410) }, /* Novatel U740 */
169 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1420) }, /* Novatel EU870 */
170 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x1430) }, /* Novatel Merlin XU870 HSDPA/3G */
171 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2100) }, /* Novatel EV620 CDMA/EV-DO */
172 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2110) }, /* Novatel Merlin ES620 / Merlin ES720 / Ovation U720 */
173 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2130) }, /* Novatel Merlin ES620 SM Bus */
174 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x2410) }, /* Novatel EU740 */
175 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x4100) }, /* Novatel U727 */
176 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, 0x4400) }, /* Novatel MC950 */
177 { USB_DEVICE(DELL_VENDOR_ID, 0x8114) }, /* Dell Wireless 5700 Mobile Broadband CDMA/EVDO Mini-Card == Novatel Expedite EV620 CDMA/EV-DO */
178 { USB_DEVICE(DELL_VENDOR_ID, 0x8115) }, /* Dell Wireless 5500 Mobile Broadband HSDPA Mini-Card == Novatel Expedite EU740 HSDPA/3G */
179 { USB_DEVICE(DELL_VENDOR_ID, 0x8116) }, /* Dell Wireless 5505 Mobile Broadband HSDPA Mini-Card == Novatel Expedite EU740 HSDPA/3G */
180 { USB_DEVICE(DELL_VENDOR_ID, 0x8117) }, /* Dell Wireless 5700 Mobile Broadband CDMA/EVDO ExpressCard == Novatel Merlin XV620 CDMA/EV-DO */
181 { USB_DEVICE(DELL_VENDOR_ID, 0x8118) }, /* Dell Wireless 5510 Mobile Broadband HSDPA ExpressCard == Novatel Merlin XU870 HSDPA/3G */
182 { USB_DEVICE(DELL_VENDOR_ID, 0x8128) }, /* Dell Wireless 5700 Mobile Broadband CDMA/EVDO Mini-Card == Novatel Expedite E720 CDMA/EV-DO */
183 { USB_DEVICE(DELL_VENDOR_ID, 0x8137) }, /* Dell Wireless HSDPA 5520 */
184 { USB_DEVICE(ANYDATA_VENDOR_ID, ANYDATA_PRODUCT_ADU_E100A) },
185 { USB_DEVICE(ANYDATA_VENDOR_ID, ANYDATA_PRODUCT_ADU_500A) },
186 { USB_DEVICE(BANDRICH_VENDOR_ID, BANDRICH_PRODUCT_C100_1) },
187 { USB_DEVICE(BANDRICH_VENDOR_ID, BANDRICH_PRODUCT_C100_2) },
188 { } /* Terminating entry */
189 };
190 MODULE_DEVICE_TABLE(usb, option_ids);
191
192 static struct usb_driver option_driver = {
193 .name = "option",
194 .probe = usb_serial_probe,
195 .disconnect = usb_serial_disconnect,
196 .id_table = option_ids,
197 .no_dynamic_id = 1,
198 };
199
200 /* The card has three separate interfaces, which the serial driver
201 * recognizes separately, thus num_port=1.
202 */
203
204 static struct usb_serial_driver option_1port_device = {
205 .driver = {
206 .owner = THIS_MODULE,
207 .name = "option1",
208 },
209 .description = "GSM modem (1-port)",
210 .usb_driver = &option_driver,
211 .id_table = option_ids,
212 .num_interrupt_in = NUM_DONT_CARE,
213 .num_bulk_in = NUM_DONT_CARE,
214 .num_bulk_out = NUM_DONT_CARE,
215 .num_ports = 1,
216 .open = option_open,
217 .close = option_close,
218 .write = option_write,
219 .write_room = option_write_room,
220 .chars_in_buffer = option_chars_in_buffer,
221 .throttle = option_rx_throttle,
222 .unthrottle = option_rx_unthrottle,
223 .ioctl = option_ioctl,
224 .set_termios = option_set_termios,
225 .break_ctl = option_break_ctl,
226 .tiocmget = option_tiocmget,
227 .tiocmset = option_tiocmset,
228 .attach = option_startup,
229 .shutdown = option_shutdown,
230 .read_int_callback = option_instat_callback,
231 };
232
233 #ifdef CONFIG_USB_DEBUG
234 static int debug;
235 #else
236 #define debug 0
237 #endif
238
239 /* per port private data */
240
241 #define N_IN_URB 4
242 #define N_OUT_URB 1
243 #define IN_BUFLEN 4096
244 #define OUT_BUFLEN 128
245
246 struct option_port_private {
247 /* Input endpoints and buffer for this port */
248 struct urb *in_urbs[N_IN_URB];
249 char in_buffer[N_IN_URB][IN_BUFLEN];
250 /* Output endpoints and buffer for this port */
251 struct urb *out_urbs[N_OUT_URB];
252 char out_buffer[N_OUT_URB][OUT_BUFLEN];
253 unsigned long out_busy; /* Bit vector of URBs in use */
254
255 /* Settings for the port */
256 int rts_state; /* Handshaking pins (outputs) */
257 int dtr_state;
258 int cts_state; /* Handshaking pins (inputs) */
259 int dsr_state;
260 int dcd_state;
261 int ri_state;
262
263 unsigned long tx_start_time[N_OUT_URB];
264 };
265
266 /* Functions used by new usb-serial code. */
267 static int __init option_init(void)
268 {
269 int retval;
270 retval = usb_serial_register(&option_1port_device);
271 if (retval)
272 goto failed_1port_device_register;
273 retval = usb_register(&option_driver);
274 if (retval)
275 goto failed_driver_register;
276
277 info(DRIVER_DESC ": " DRIVER_VERSION);
278
279 return 0;
280
281 failed_driver_register:
282 usb_serial_deregister (&option_1port_device);
283 failed_1port_device_register:
284 return retval;
285 }
286
287 static void __exit option_exit(void)
288 {
289 usb_deregister (&option_driver);
290 usb_serial_deregister (&option_1port_device);
291 }
292
293 module_init(option_init);
294 module_exit(option_exit);
295
296 static void option_rx_throttle(struct usb_serial_port *port)
297 {
298 dbg("%s", __FUNCTION__);
299 }
300
301 static void option_rx_unthrottle(struct usb_serial_port *port)
302 {
303 dbg("%s", __FUNCTION__);
304 }
305
306 static void option_break_ctl(struct usb_serial_port *port, int break_state)
307 {
308 /* Unfortunately, I don't know how to send a break */
309 dbg("%s", __FUNCTION__);
310 }
311
312 static void option_set_termios(struct usb_serial_port *port,
313 struct ktermios *old_termios)
314 {
315 dbg("%s", __FUNCTION__);
316 /* Doesn't support option setting */
317 tty_termios_copy_hw(port->tty->termios, old_termios);
318 option_send_setup(port);
319 }
320
321 static int option_tiocmget(struct usb_serial_port *port, struct file *file)
322 {
323 unsigned int value;
324 struct option_port_private *portdata;
325
326 portdata = usb_get_serial_port_data(port);
327
328 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
329 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
330 ((portdata->cts_state) ? TIOCM_CTS : 0) |
331 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
332 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
333 ((portdata->ri_state) ? TIOCM_RNG : 0);
334
335 return value;
336 }
337
338 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
339 unsigned int set, unsigned int clear)
340 {
341 struct option_port_private *portdata;
342
343 portdata = usb_get_serial_port_data(port);
344
345 if (set & TIOCM_RTS)
346 portdata->rts_state = 1;
347 if (set & TIOCM_DTR)
348 portdata->dtr_state = 1;
349
350 if (clear & TIOCM_RTS)
351 portdata->rts_state = 0;
352 if (clear & TIOCM_DTR)
353 portdata->dtr_state = 0;
354 return option_send_setup(port);
355 }
356
357 static int option_ioctl(struct usb_serial_port *port, struct file *file,
358 unsigned int cmd, unsigned long arg)
359 {
360 return -ENOIOCTLCMD;
361 }
362
363 /* Write */
364 static int option_write(struct usb_serial_port *port,
365 const unsigned char *buf, int count)
366 {
367 struct option_port_private *portdata;
368 int i;
369 int left, todo;
370 struct urb *this_urb = NULL; /* spurious */
371 int err;
372
373 portdata = usb_get_serial_port_data(port);
374
375 dbg("%s: write (%d chars)", __FUNCTION__, count);
376
377 i = 0;
378 left = count;
379 for (i=0; left > 0 && i < N_OUT_URB; i++) {
380 todo = left;
381 if (todo > OUT_BUFLEN)
382 todo = OUT_BUFLEN;
383
384 this_urb = portdata->out_urbs[i];
385 if (test_and_set_bit(i, &portdata->out_busy)) {
386 if (time_before(jiffies,
387 portdata->tx_start_time[i] + 10 * HZ))
388 continue;
389 usb_unlink_urb(this_urb);
390 continue;
391 }
392 if (this_urb->status != 0)
393 dbg("usb_write %p failed (err=%d)",
394 this_urb, this_urb->status);
395
396 dbg("%s: endpoint %d buf %d", __FUNCTION__,
397 usb_pipeendpoint(this_urb->pipe), i);
398
399 /* send the data */
400 memcpy (this_urb->transfer_buffer, buf, todo);
401 this_urb->transfer_buffer_length = todo;
402
403 this_urb->dev = port->serial->dev;
404 err = usb_submit_urb(this_urb, GFP_ATOMIC);
405 if (err) {
406 dbg("usb_submit_urb %p (write bulk) failed "
407 "(%d, has %d)", this_urb,
408 err, this_urb->status);
409 clear_bit(i, &portdata->out_busy);
410 continue;
411 }
412 portdata->tx_start_time[i] = jiffies;
413 buf += todo;
414 left -= todo;
415 }
416
417 count -= left;
418 dbg("%s: wrote (did %d)", __FUNCTION__, count);
419 return count;
420 }
421
422 static void option_indat_callback(struct urb *urb)
423 {
424 int err;
425 int endpoint;
426 struct usb_serial_port *port;
427 struct tty_struct *tty;
428 unsigned char *data = urb->transfer_buffer;
429 int status = urb->status;
430
431 dbg("%s: %p", __FUNCTION__, urb);
432
433 endpoint = usb_pipeendpoint(urb->pipe);
434 port = (struct usb_serial_port *) urb->context;
435
436 if (status) {
437 dbg("%s: nonzero status: %d on endpoint %02x.",
438 __FUNCTION__, status, endpoint);
439 } else {
440 tty = port->tty;
441 if (urb->actual_length) {
442 tty_buffer_request_room(tty, urb->actual_length);
443 tty_insert_flip_string(tty, data, urb->actual_length);
444 tty_flip_buffer_push(tty);
445 } else {
446 dbg("%s: empty read urb received", __FUNCTION__);
447 }
448
449 /* Resubmit urb so we continue receiving */
450 if (port->open_count && status != -ESHUTDOWN) {
451 err = usb_submit_urb(urb, GFP_ATOMIC);
452 if (err)
453 printk(KERN_ERR "%s: resubmit read urb failed. "
454 "(%d)", __FUNCTION__, err);
455 }
456 }
457 return;
458 }
459
460 static void option_outdat_callback(struct urb *urb)
461 {
462 struct usb_serial_port *port;
463 struct option_port_private *portdata;
464 int i;
465
466 dbg("%s", __FUNCTION__);
467
468 port = (struct usb_serial_port *) urb->context;
469
470 usb_serial_port_softint(port);
471
472 portdata = usb_get_serial_port_data(port);
473 for (i = 0; i < N_OUT_URB; ++i) {
474 if (portdata->out_urbs[i] == urb) {
475 smp_mb__before_clear_bit();
476 clear_bit(i, &portdata->out_busy);
477 break;
478 }
479 }
480 }
481
482 static void option_instat_callback(struct urb *urb)
483 {
484 int err;
485 int status = urb->status;
486 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
487 struct option_port_private *portdata = usb_get_serial_port_data(port);
488 struct usb_serial *serial = port->serial;
489
490 dbg("%s", __FUNCTION__);
491 dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
492
493 if (status == 0) {
494 struct usb_ctrlrequest *req_pkt =
495 (struct usb_ctrlrequest *)urb->transfer_buffer;
496
497 if (!req_pkt) {
498 dbg("%s: NULL req_pkt\n", __FUNCTION__);
499 return;
500 }
501 if ((req_pkt->bRequestType == 0xA1) &&
502 (req_pkt->bRequest == 0x20)) {
503 int old_dcd_state;
504 unsigned char signals = *((unsigned char *)
505 urb->transfer_buffer +
506 sizeof(struct usb_ctrlrequest));
507
508 dbg("%s: signal x%x", __FUNCTION__, signals);
509
510 old_dcd_state = portdata->dcd_state;
511 portdata->cts_state = 1;
512 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
513 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
514 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
515
516 if (port->tty && !C_CLOCAL(port->tty) &&
517 old_dcd_state && !portdata->dcd_state)
518 tty_hangup(port->tty);
519 } else {
520 dbg("%s: type %x req %x", __FUNCTION__,
521 req_pkt->bRequestType,req_pkt->bRequest);
522 }
523 } else
524 dbg("%s: error %d", __FUNCTION__, status);
525
526 /* Resubmit urb so we continue receiving IRQ data */
527 if (status != -ESHUTDOWN) {
528 urb->dev = serial->dev;
529 err = usb_submit_urb(urb, GFP_ATOMIC);
530 if (err)
531 dbg("%s: resubmit intr urb failed. (%d)",
532 __FUNCTION__, err);
533 }
534 }
535
536 static int option_write_room(struct usb_serial_port *port)
537 {
538 struct option_port_private *portdata;
539 int i;
540 int data_len = 0;
541 struct urb *this_urb;
542
543 portdata = usb_get_serial_port_data(port);
544
545 for (i=0; i < N_OUT_URB; i++) {
546 this_urb = portdata->out_urbs[i];
547 if (this_urb && !test_bit(i, &portdata->out_busy))
548 data_len += OUT_BUFLEN;
549 }
550
551 dbg("%s: %d", __FUNCTION__, data_len);
552 return data_len;
553 }
554
555 static int option_chars_in_buffer(struct usb_serial_port *port)
556 {
557 struct option_port_private *portdata;
558 int i;
559 int data_len = 0;
560 struct urb *this_urb;
561
562 portdata = usb_get_serial_port_data(port);
563
564 for (i=0; i < N_OUT_URB; i++) {
565 this_urb = portdata->out_urbs[i];
566 if (this_urb && test_bit(i, &portdata->out_busy))
567 data_len += this_urb->transfer_buffer_length;
568 }
569 dbg("%s: %d", __FUNCTION__, data_len);
570 return data_len;
571 }
572
573 static int option_open(struct usb_serial_port *port, struct file *filp)
574 {
575 struct option_port_private *portdata;
576 struct usb_serial *serial = port->serial;
577 int i, err;
578 struct urb *urb;
579
580 portdata = usb_get_serial_port_data(port);
581
582 dbg("%s", __FUNCTION__);
583
584 /* Set some sane defaults */
585 portdata->rts_state = 1;
586 portdata->dtr_state = 1;
587
588 /* Reset low level data toggle and start reading from endpoints */
589 for (i = 0; i < N_IN_URB; i++) {
590 urb = portdata->in_urbs[i];
591 if (! urb)
592 continue;
593 if (urb->dev != serial->dev) {
594 dbg("%s: dev %p != %p", __FUNCTION__,
595 urb->dev, serial->dev);
596 continue;
597 }
598
599 /*
600 * make sure endpoint data toggle is synchronized with the
601 * device
602 */
603 usb_clear_halt(urb->dev, urb->pipe);
604
605 err = usb_submit_urb(urb, GFP_KERNEL);
606 if (err) {
607 dbg("%s: submit urb %d failed (%d) %d",
608 __FUNCTION__, i, err,
609 urb->transfer_buffer_length);
610 }
611 }
612
613 /* Reset low level data toggle on out endpoints */
614 for (i = 0; i < N_OUT_URB; i++) {
615 urb = portdata->out_urbs[i];
616 if (! urb)
617 continue;
618 urb->dev = serial->dev;
619 /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
620 usb_pipeout(urb->pipe), 0); */
621 }
622
623 port->tty->low_latency = 1;
624
625 option_send_setup(port);
626
627 return (0);
628 }
629
630 static void option_close(struct usb_serial_port *port, struct file *filp)
631 {
632 int i;
633 struct usb_serial *serial = port->serial;
634 struct option_port_private *portdata;
635
636 dbg("%s", __FUNCTION__);
637 portdata = usb_get_serial_port_data(port);
638
639 portdata->rts_state = 0;
640 portdata->dtr_state = 0;
641
642 if (serial->dev) {
643 option_send_setup(port);
644
645 /* Stop reading/writing urbs */
646 for (i = 0; i < N_IN_URB; i++)
647 usb_kill_urb(portdata->in_urbs[i]);
648 for (i = 0; i < N_OUT_URB; i++)
649 usb_kill_urb(portdata->out_urbs[i]);
650 }
651 port->tty = NULL;
652 }
653
654 /* Helper functions used by option_setup_urbs */
655 static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
656 int dir, void *ctx, char *buf, int len,
657 void (*callback)(struct urb *))
658 {
659 struct urb *urb;
660
661 if (endpoint == -1)
662 return NULL; /* endpoint not needed */
663
664 urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
665 if (urb == NULL) {
666 dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
667 return NULL;
668 }
669
670 /* Fill URB using supplied data. */
671 usb_fill_bulk_urb(urb, serial->dev,
672 usb_sndbulkpipe(serial->dev, endpoint) | dir,
673 buf, len, callback, ctx);
674
675 return urb;
676 }
677
678 /* Setup urbs */
679 static void option_setup_urbs(struct usb_serial *serial)
680 {
681 int i,j;
682 struct usb_serial_port *port;
683 struct option_port_private *portdata;
684
685 dbg("%s", __FUNCTION__);
686
687 for (i = 0; i < serial->num_ports; i++) {
688 port = serial->port[i];
689 portdata = usb_get_serial_port_data(port);
690
691 /* Do indat endpoints first */
692 for (j = 0; j < N_IN_URB; ++j) {
693 portdata->in_urbs[j] = option_setup_urb (serial,
694 port->bulk_in_endpointAddress, USB_DIR_IN, port,
695 portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
696 }
697
698 /* outdat endpoints */
699 for (j = 0; j < N_OUT_URB; ++j) {
700 portdata->out_urbs[j] = option_setup_urb (serial,
701 port->bulk_out_endpointAddress, USB_DIR_OUT, port,
702 portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
703 }
704 }
705 }
706
707 static int option_send_setup(struct usb_serial_port *port)
708 {
709 struct usb_serial *serial = port->serial;
710 struct option_port_private *portdata;
711
712 dbg("%s", __FUNCTION__);
713
714 if (port->number != 0)
715 return 0;
716
717 portdata = usb_get_serial_port_data(port);
718
719 if (port->tty) {
720 int val = 0;
721 if (portdata->dtr_state)
722 val |= 0x01;
723 if (portdata->rts_state)
724 val |= 0x02;
725
726 return usb_control_msg(serial->dev,
727 usb_rcvctrlpipe(serial->dev, 0),
728 0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
729 }
730
731 return 0;
732 }
733
734 static int option_startup(struct usb_serial *serial)
735 {
736 int i, err;
737 struct usb_serial_port *port;
738 struct option_port_private *portdata;
739
740 dbg("%s", __FUNCTION__);
741
742 /* Now setup per port private data */
743 for (i = 0; i < serial->num_ports; i++) {
744 port = serial->port[i];
745 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
746 if (!portdata) {
747 dbg("%s: kmalloc for option_port_private (%d) failed!.",
748 __FUNCTION__, i);
749 return (1);
750 }
751
752 usb_set_serial_port_data(port, portdata);
753
754 if (! port->interrupt_in_urb)
755 continue;
756 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
757 if (err)
758 dbg("%s: submit irq_in urb failed %d",
759 __FUNCTION__, err);
760 }
761
762 option_setup_urbs(serial);
763
764 return (0);
765 }
766
767 static void option_shutdown(struct usb_serial *serial)
768 {
769 int i, j;
770 struct usb_serial_port *port;
771 struct option_port_private *portdata;
772
773 dbg("%s", __FUNCTION__);
774
775 /* Stop reading/writing urbs */
776 for (i = 0; i < serial->num_ports; ++i) {
777 port = serial->port[i];
778 portdata = usb_get_serial_port_data(port);
779 for (j = 0; j < N_IN_URB; j++)
780 usb_kill_urb(portdata->in_urbs[j]);
781 for (j = 0; j < N_OUT_URB; j++)
782 usb_kill_urb(portdata->out_urbs[j]);
783 }
784
785 /* Now free them */
786 for (i = 0; i < serial->num_ports; ++i) {
787 port = serial->port[i];
788 portdata = usb_get_serial_port_data(port);
789
790 for (j = 0; j < N_IN_URB; j++) {
791 if (portdata->in_urbs[j]) {
792 usb_free_urb(portdata->in_urbs[j]);
793 portdata->in_urbs[j] = NULL;
794 }
795 }
796 for (j = 0; j < N_OUT_URB; j++) {
797 if (portdata->out_urbs[j]) {
798 usb_free_urb(portdata->out_urbs[j]);
799 portdata->out_urbs[j] = NULL;
800 }
801 }
802 }
803
804 /* Now free per port private data */
805 for (i = 0; i < serial->num_ports; i++) {
806 port = serial->port[i];
807 kfree(usb_get_serial_port_data(port));
808 }
809 }
810
811 MODULE_AUTHOR(DRIVER_AUTHOR);
812 MODULE_DESCRIPTION(DRIVER_DESC);
813 MODULE_VERSION(DRIVER_VERSION);
814 MODULE_LICENSE("GPL");
815
816 #ifdef CONFIG_USB_DEBUG
817 module_param(debug, bool, S_IRUGO | S_IWUSR);
818 MODULE_PARM_DESC(debug, "Debug messages");
819 #endif
820
kernel-based virtual machine