Commit | Line | Data |
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cf7776dc HL |
1 | /* |
2 | * USB driver for Gigaset 307x base via direct USB connection. | |
3 | * | |
4 | * Copyright (c) 2001 by Hansjoerg Lipp <hjlipp@web.de>, | |
5 | * Tilman Schmidt <tilman@imap.cc>, | |
6 | * Stefan Eilers <Eilers.Stefan@epost.de>. | |
7 | * | |
8 | * Based on usb-gigaset.c. | |
9 | * | |
10 | * ===================================================================== | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License as | |
13 | * published by the Free Software Foundation; either version 2 of | |
14 | * the License, or (at your option) any later version. | |
15 | * ===================================================================== | |
cf7776dc HL |
16 | */ |
17 | ||
18 | #include "gigaset.h" | |
19 | ||
20 | #include <linux/errno.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/usb.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/moduleparam.h> | |
27 | ||
28 | /* Version Information */ | |
29 | #define DRIVER_AUTHOR "Tilman Schmidt <tilman@imap.cc>, Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers <Eilers.Stefan@epost.de>" | |
30 | #define DRIVER_DESC "USB Driver for Gigaset 307x" | |
31 | ||
32 | ||
33 | /* Module parameters */ | |
34 | ||
35 | static int startmode = SM_ISDN; | |
36 | static int cidmode = 1; | |
37 | ||
38 | module_param(startmode, int, S_IRUGO); | |
39 | module_param(cidmode, int, S_IRUGO); | |
40 | MODULE_PARM_DESC(startmode, "start in isdn4linux mode"); | |
41 | MODULE_PARM_DESC(cidmode, "Call-ID mode"); | |
42 | ||
43 | #define GIGASET_MINORS 1 | |
44 | #define GIGASET_MINOR 16 | |
45 | #define GIGASET_MODULENAME "bas_gigaset" | |
46 | #define GIGASET_DEVFSNAME "gig/bas/" | |
47 | #define GIGASET_DEVNAME "ttyGB" | |
48 | ||
49 | #define IF_WRITEBUF 256 //FIXME | |
50 | ||
51 | /* Values for the Gigaset 307x */ | |
52 | #define USB_GIGA_VENDOR_ID 0x0681 | |
53 | #define USB_GIGA_PRODUCT_ID 0x0001 | |
54 | #define USB_4175_PRODUCT_ID 0x0002 | |
55 | #define USB_SX303_PRODUCT_ID 0x0021 | |
56 | #define USB_SX353_PRODUCT_ID 0x0022 | |
57 | ||
58 | /* table of devices that work with this driver */ | |
59 | static struct usb_device_id gigaset_table [] = { | |
60 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_GIGA_PRODUCT_ID) }, | |
61 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_4175_PRODUCT_ID) }, | |
62 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX303_PRODUCT_ID) }, | |
63 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX353_PRODUCT_ID) }, | |
64 | { } /* Terminating entry */ | |
65 | }; | |
66 | ||
67 | MODULE_DEVICE_TABLE(usb, gigaset_table); | |
68 | ||
cf7776dc HL |
69 | /*======================= local function prototypes =============================*/ |
70 | ||
71 | /* This function is called if a new device is connected to the USB port. It | |
72 | * checks whether this new device belongs to this driver. | |
73 | */ | |
74 | static int gigaset_probe(struct usb_interface *interface, | |
75 | const struct usb_device_id *id); | |
76 | ||
77 | /* Function will be called if the device is unplugged */ | |
78 | static void gigaset_disconnect(struct usb_interface *interface); | |
79 | ||
80 | ||
81 | /*==============================================================================*/ | |
82 | ||
83 | struct bas_cardstate { | |
784d5858 TS |
84 | struct usb_device *udev; /* USB device pointer */ |
85 | struct usb_interface *interface; /* interface for this device */ | |
cf7776dc HL |
86 | unsigned char minor; /* starting minor number */ |
87 | ||
784d5858 | 88 | struct urb *urb_ctrl; /* control pipe default URB */ |
cf7776dc HL |
89 | struct usb_ctrlrequest dr_ctrl; |
90 | struct timer_list timer_ctrl; /* control request timeout */ | |
91 | ||
92 | struct timer_list timer_atrdy; /* AT command ready timeout */ | |
784d5858 | 93 | struct urb *urb_cmd_out; /* for sending AT commands */ |
cf7776dc HL |
94 | struct usb_ctrlrequest dr_cmd_out; |
95 | int retry_cmd_out; | |
96 | ||
784d5858 | 97 | struct urb *urb_cmd_in; /* for receiving AT replies */ |
cf7776dc HL |
98 | struct usb_ctrlrequest dr_cmd_in; |
99 | struct timer_list timer_cmd_in; /* receive request timeout */ | |
784d5858 | 100 | unsigned char *rcvbuf; /* AT reply receive buffer */ |
cf7776dc | 101 | |
784d5858 | 102 | struct urb *urb_int_in; /* URB for interrupt pipe */ |
cf7776dc HL |
103 | unsigned char int_in_buf[3]; |
104 | ||
105 | spinlock_t lock; /* locks all following */ | |
106 | atomic_t basstate; /* bitmap (BS_*) */ | |
107 | int pending; /* uncompleted base request */ | |
108 | int rcvbuf_size; /* size of AT receive buffer */ | |
109 | /* 0: no receive in progress */ | |
110 | int retry_cmd_in; /* receive req retry count */ | |
111 | }; | |
112 | ||
113 | /* status of direct USB connection to 307x base (bits in basstate) */ | |
114 | #define BS_ATOPEN 0x001 | |
115 | #define BS_B1OPEN 0x002 | |
116 | #define BS_B2OPEN 0x004 | |
117 | #define BS_ATREADY 0x008 | |
118 | #define BS_INIT 0x010 | |
119 | #define BS_ATTIMER 0x020 | |
120 | ||
121 | ||
122 | static struct gigaset_driver *driver = NULL; | |
123 | static struct cardstate *cardstate = NULL; | |
124 | ||
125 | /* usb specific object needed to register this driver with the usb subsystem */ | |
126 | static struct usb_driver gigaset_usb_driver = { | |
127 | .name = GIGASET_MODULENAME, | |
128 | .probe = gigaset_probe, | |
129 | .disconnect = gigaset_disconnect, | |
130 | .id_table = gigaset_table, | |
131 | }; | |
132 | ||
133 | /* get message text for USB status code | |
134 | */ | |
135 | static char *get_usb_statmsg(int status) | |
136 | { | |
137 | static char unkmsg[28]; | |
138 | ||
139 | switch (status) { | |
140 | case 0: | |
141 | return "success"; | |
142 | case -ENOENT: | |
143 | return "canceled"; | |
144 | case -ECONNRESET: | |
145 | return "canceled (async)"; | |
146 | case -EINPROGRESS: | |
147 | return "pending"; | |
148 | case -EPROTO: | |
149 | return "bit stuffing or unknown USB error"; | |
150 | case -EILSEQ: | |
151 | return "Illegal byte sequence (CRC mismatch)"; | |
152 | case -EPIPE: | |
153 | return "babble detect or endpoint stalled"; | |
154 | case -ENOSR: | |
155 | return "buffer error"; | |
156 | case -ETIMEDOUT: | |
157 | return "timed out"; | |
158 | case -ENODEV: | |
159 | return "device not present"; | |
160 | case -EREMOTEIO: | |
161 | return "short packet detected"; | |
162 | case -EXDEV: | |
163 | return "partial isochronous transfer"; | |
164 | case -EINVAL: | |
165 | return "invalid argument"; | |
166 | case -ENXIO: | |
167 | return "URB already queued"; | |
168 | case -EAGAIN: | |
169 | return "isochronous start frame too early or too much scheduled"; | |
170 | case -EFBIG: | |
171 | return "too many isochronous frames requested"; | |
172 | case -EMSGSIZE: | |
173 | return "endpoint message size zero"; | |
174 | case -ESHUTDOWN: | |
175 | return "endpoint shutdown"; | |
176 | case -EBUSY: | |
177 | return "another request pending"; | |
178 | default: | |
179 | snprintf(unkmsg, sizeof(unkmsg), "unknown error %d", status); | |
180 | return unkmsg; | |
181 | } | |
182 | } | |
183 | ||
184 | /* usb_pipetype_str | |
185 | * retrieve string representation of USB pipe type | |
186 | */ | |
187 | static inline char *usb_pipetype_str(int pipe) | |
188 | { | |
189 | if (usb_pipeisoc(pipe)) | |
190 | return "Isoc"; | |
191 | if (usb_pipeint(pipe)) | |
192 | return "Int"; | |
193 | if (usb_pipecontrol(pipe)) | |
194 | return "Ctrl"; | |
195 | if (usb_pipebulk(pipe)) | |
196 | return "Bulk"; | |
197 | return "?"; | |
198 | } | |
199 | ||
200 | /* dump_urb | |
201 | * write content of URB to syslog for debugging | |
202 | */ | |
203 | static inline void dump_urb(enum debuglevel level, const char *tag, | |
784d5858 | 204 | struct urb *urb) |
cf7776dc HL |
205 | { |
206 | #ifdef CONFIG_GIGASET_DEBUG | |
207 | int i; | |
784d5858 | 208 | gig_dbg(level, "%s urb(0x%08lx)->{", tag, (unsigned long) urb); |
cf7776dc | 209 | if (urb) { |
784d5858 TS |
210 | gig_dbg(level, |
211 | " dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, " | |
212 | "status=%d, hcpriv=0x%08lx, transfer_flags=0x%x,", | |
213 | (unsigned long) urb->dev, | |
214 | usb_pipetype_str(urb->pipe), | |
215 | usb_pipeendpoint(urb->pipe), usb_pipedevice(urb->pipe), | |
216 | usb_pipein(urb->pipe) ? "in" : "out", | |
217 | urb->status, (unsigned long) urb->hcpriv, | |
218 | urb->transfer_flags); | |
219 | gig_dbg(level, | |
220 | " transfer_buffer=0x%08lx[%d], actual_length=%d, " | |
221 | "bandwidth=%d, setup_packet=0x%08lx,", | |
222 | (unsigned long) urb->transfer_buffer, | |
223 | urb->transfer_buffer_length, urb->actual_length, | |
224 | urb->bandwidth, (unsigned long) urb->setup_packet); | |
225 | gig_dbg(level, | |
226 | " start_frame=%d, number_of_packets=%d, interval=%d, " | |
227 | "error_count=%d,", | |
228 | urb->start_frame, urb->number_of_packets, urb->interval, | |
229 | urb->error_count); | |
230 | gig_dbg(level, | |
231 | " context=0x%08lx, complete=0x%08lx, " | |
232 | "iso_frame_desc[]={", | |
233 | (unsigned long) urb->context, | |
234 | (unsigned long) urb->complete); | |
cf7776dc | 235 | for (i = 0; i < urb->number_of_packets; i++) { |
917f5085 TS |
236 | struct usb_iso_packet_descriptor *pifd |
237 | = &urb->iso_frame_desc[i]; | |
784d5858 TS |
238 | gig_dbg(level, |
239 | " {offset=%u, length=%u, actual_length=%u, " | |
240 | "status=%u}", | |
241 | pifd->offset, pifd->length, pifd->actual_length, | |
242 | pifd->status); | |
cf7776dc HL |
243 | } |
244 | } | |
784d5858 | 245 | gig_dbg(level, "}}"); |
cf7776dc HL |
246 | #endif |
247 | } | |
248 | ||
249 | /* read/set modem control bits etc. (m10x only) */ | |
250 | static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state, | |
784d5858 | 251 | unsigned new_state) |
cf7776dc HL |
252 | { |
253 | return -EINVAL; | |
254 | } | |
255 | ||
256 | static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag) | |
257 | { | |
258 | return -EINVAL; | |
259 | } | |
260 | ||
261 | static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag) | |
262 | { | |
263 | return -EINVAL; | |
264 | } | |
265 | ||
266 | /* error_hangup | |
267 | * hang up any existing connection because of an unrecoverable error | |
268 | * This function may be called from any context and takes care of scheduling | |
269 | * the necessary actions for execution outside of interrupt context. | |
270 | * argument: | |
271 | * B channel control structure | |
272 | */ | |
273 | static inline void error_hangup(struct bc_state *bcs) | |
274 | { | |
275 | struct cardstate *cs = bcs->cs; | |
276 | ||
784d5858 TS |
277 | gig_dbg(DEBUG_ANY, "%s: scheduling HUP for channel %d", |
278 | __func__, bcs->channel); | |
cf7776dc HL |
279 | |
280 | if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) { | |
281 | //FIXME what should we do? | |
282 | return; | |
283 | } | |
284 | ||
285 | gigaset_schedule_event(cs); | |
286 | } | |
287 | ||
288 | /* error_reset | |
289 | * reset Gigaset device because of an unrecoverable error | |
290 | * This function may be called from any context and takes care of scheduling | |
291 | * the necessary actions for execution outside of interrupt context. | |
292 | * argument: | |
293 | * controller state structure | |
294 | */ | |
295 | static inline void error_reset(struct cardstate *cs) | |
296 | { | |
297 | //FIXME try to recover without bothering the user | |
784d5858 TS |
298 | dev_err(cs->dev, |
299 | "unrecoverable error - please disconnect Gigaset base to reset\n"); | |
cf7776dc HL |
300 | } |
301 | ||
302 | /* check_pending | |
303 | * check for completion of pending control request | |
304 | * parameter: | |
784d5858 | 305 | * ucs hardware specific controller state structure |
cf7776dc HL |
306 | */ |
307 | static void check_pending(struct bas_cardstate *ucs) | |
308 | { | |
309 | unsigned long flags; | |
310 | ||
cf7776dc HL |
311 | spin_lock_irqsave(&ucs->lock, flags); |
312 | switch (ucs->pending) { | |
313 | case 0: | |
314 | break; | |
315 | case HD_OPEN_ATCHANNEL: | |
316 | if (atomic_read(&ucs->basstate) & BS_ATOPEN) | |
317 | ucs->pending = 0; | |
318 | break; | |
319 | case HD_OPEN_B1CHANNEL: | |
320 | if (atomic_read(&ucs->basstate) & BS_B1OPEN) | |
321 | ucs->pending = 0; | |
322 | break; | |
323 | case HD_OPEN_B2CHANNEL: | |
324 | if (atomic_read(&ucs->basstate) & BS_B2OPEN) | |
325 | ucs->pending = 0; | |
326 | break; | |
327 | case HD_CLOSE_ATCHANNEL: | |
328 | if (!(atomic_read(&ucs->basstate) & BS_ATOPEN)) | |
329 | ucs->pending = 0; | |
cf7776dc HL |
330 | break; |
331 | case HD_CLOSE_B1CHANNEL: | |
332 | if (!(atomic_read(&ucs->basstate) & BS_B1OPEN)) | |
333 | ucs->pending = 0; | |
334 | break; | |
335 | case HD_CLOSE_B2CHANNEL: | |
336 | if (!(atomic_read(&ucs->basstate) & BS_B2OPEN)) | |
337 | ucs->pending = 0; | |
338 | break; | |
339 | case HD_DEVICE_INIT_ACK: /* no reply expected */ | |
340 | ucs->pending = 0; | |
341 | break; | |
342 | /* HD_READ_ATMESSAGE, HD_WRITE_ATMESSAGE, HD_RESET_INTERRUPTPIPE | |
343 | * are handled separately and should never end up here | |
344 | */ | |
345 | default: | |
784d5858 TS |
346 | dev_warn(&ucs->interface->dev, |
347 | "unknown pending request 0x%02x cleared\n", | |
348 | ucs->pending); | |
cf7776dc HL |
349 | ucs->pending = 0; |
350 | } | |
351 | ||
352 | if (!ucs->pending) | |
353 | del_timer(&ucs->timer_ctrl); | |
354 | ||
355 | spin_unlock_irqrestore(&ucs->lock, flags); | |
356 | } | |
357 | ||
358 | /* cmd_in_timeout | |
359 | * timeout routine for command input request | |
360 | * argument: | |
361 | * controller state structure | |
362 | */ | |
363 | static void cmd_in_timeout(unsigned long data) | |
364 | { | |
365 | struct cardstate *cs = (struct cardstate *) data; | |
d48c7784 | 366 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc HL |
367 | unsigned long flags; |
368 | ||
cf7776dc | 369 | spin_lock_irqsave(&cs->lock, flags); |
784d5858 TS |
370 | if (unlikely(!atomic_read(&cs->connected))) { |
371 | gig_dbg(DEBUG_USBREQ, "%s: disconnected", __func__); | |
cf7776dc HL |
372 | spin_unlock_irqrestore(&cs->lock, flags); |
373 | return; | |
374 | } | |
375 | if (!ucs->rcvbuf_size) { | |
784d5858 | 376 | gig_dbg(DEBUG_USBREQ, "%s: no receive in progress", __func__); |
cf7776dc HL |
377 | spin_unlock_irqrestore(&cs->lock, flags); |
378 | return; | |
379 | } | |
380 | spin_unlock_irqrestore(&cs->lock, flags); | |
381 | ||
784d5858 | 382 | dev_err(cs->dev, "timeout reading AT response\n"); |
cf7776dc HL |
383 | error_reset(cs); //FIXME retry? |
384 | } | |
385 | ||
386 | ||
387 | static void read_ctrl_callback(struct urb *urb, struct pt_regs *regs); | |
388 | ||
389 | /* atread_submit | |
390 | * submit an HD_READ_ATMESSAGE command URB | |
391 | * parameters: | |
392 | * cs controller state structure | |
393 | * timeout timeout in 1/10 sec., 0: none | |
394 | * return value: | |
395 | * 0 on success | |
396 | * -EINVAL if a NULL pointer is encountered somewhere | |
397 | * -EBUSY if another request is pending | |
398 | * any URB submission error code | |
399 | */ | |
400 | static int atread_submit(struct cardstate *cs, int timeout) | |
401 | { | |
d48c7784 | 402 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc HL |
403 | int ret; |
404 | ||
784d5858 TS |
405 | gig_dbg(DEBUG_USBREQ, "-------> HD_READ_ATMESSAGE (%d)", |
406 | ucs->rcvbuf_size); | |
cf7776dc HL |
407 | |
408 | if (ucs->urb_cmd_in->status == -EINPROGRESS) { | |
784d5858 TS |
409 | dev_err(cs->dev, |
410 | "could not submit HD_READ_ATMESSAGE: URB busy\n"); | |
cf7776dc HL |
411 | return -EBUSY; |
412 | } | |
413 | ||
414 | ucs->dr_cmd_in.bRequestType = IN_VENDOR_REQ; | |
415 | ucs->dr_cmd_in.bRequest = HD_READ_ATMESSAGE; | |
416 | ucs->dr_cmd_in.wValue = 0; | |
417 | ucs->dr_cmd_in.wIndex = 0; | |
418 | ucs->dr_cmd_in.wLength = cpu_to_le16(ucs->rcvbuf_size); | |
419 | usb_fill_control_urb(ucs->urb_cmd_in, ucs->udev, | |
784d5858 TS |
420 | usb_rcvctrlpipe(ucs->udev, 0), |
421 | (unsigned char*) & ucs->dr_cmd_in, | |
422 | ucs->rcvbuf, ucs->rcvbuf_size, | |
423 | read_ctrl_callback, cs->inbuf); | |
cf7776dc HL |
424 | |
425 | if ((ret = usb_submit_urb(ucs->urb_cmd_in, SLAB_ATOMIC)) != 0) { | |
784d5858 TS |
426 | dev_err(cs->dev, "could not submit HD_READ_ATMESSAGE: %s\n", |
427 | get_usb_statmsg(ret)); | |
cf7776dc HL |
428 | return ret; |
429 | } | |
430 | ||
431 | if (timeout > 0) { | |
784d5858 | 432 | gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout); |
cf7776dc HL |
433 | ucs->timer_cmd_in.expires = jiffies + timeout * HZ / 10; |
434 | ucs->timer_cmd_in.data = (unsigned long) cs; | |
435 | ucs->timer_cmd_in.function = cmd_in_timeout; | |
436 | add_timer(&ucs->timer_cmd_in); | |
437 | } | |
438 | return 0; | |
439 | } | |
440 | ||
441 | static void stopurbs(struct bas_bc_state *); | |
442 | static int start_cbsend(struct cardstate *); | |
443 | ||
444 | /* set/clear bits in base connection state | |
445 | */ | |
446 | inline static void update_basstate(struct bas_cardstate *ucs, | |
447 | int set, int clear) | |
448 | { | |
449 | unsigned long flags; | |
450 | int state; | |
451 | ||
452 | spin_lock_irqsave(&ucs->lock, flags); | |
453 | state = atomic_read(&ucs->basstate); | |
454 | state &= ~clear; | |
455 | state |= set; | |
456 | atomic_set(&ucs->basstate, state); | |
457 | spin_unlock_irqrestore(&ucs->lock, flags); | |
458 | } | |
459 | ||
460 | ||
461 | /* read_int_callback | |
462 | * USB completion handler for interrupt pipe input | |
463 | * called by the USB subsystem in interrupt context | |
464 | * parameter: | |
465 | * urb USB request block | |
466 | * urb->context = controller state structure | |
467 | */ | |
468 | static void read_int_callback(struct urb *urb, struct pt_regs *regs) | |
469 | { | |
d48c7784 TS |
470 | struct cardstate *cs = urb->context; |
471 | struct bas_cardstate *ucs = cs->hw.bas; | |
cf7776dc HL |
472 | struct bc_state *bcs; |
473 | unsigned long flags; | |
474 | int status; | |
475 | unsigned l; | |
476 | int channel; | |
477 | ||
cf7776dc HL |
478 | if (unlikely(!atomic_read(&cs->connected))) { |
479 | warn("%s: disconnected", __func__); | |
480 | return; | |
481 | } | |
482 | ||
483 | switch (urb->status) { | |
484 | case 0: /* success */ | |
485 | break; | |
486 | case -ENOENT: /* canceled */ | |
487 | case -ECONNRESET: /* canceled (async) */ | |
488 | case -EINPROGRESS: /* pending */ | |
489 | /* ignore silently */ | |
784d5858 TS |
490 | gig_dbg(DEBUG_USBREQ, "%s: %s", |
491 | __func__, get_usb_statmsg(urb->status)); | |
cf7776dc HL |
492 | return; |
493 | default: /* severe trouble */ | |
784d5858 TS |
494 | dev_warn(cs->dev, "interrupt read: %s\n", |
495 | get_usb_statmsg(urb->status)); | |
cf7776dc HL |
496 | //FIXME corrective action? resubmission always ok? |
497 | goto resubmit; | |
498 | } | |
499 | ||
500 | l = (unsigned) ucs->int_in_buf[1] + | |
501 | (((unsigned) ucs->int_in_buf[2]) << 8); | |
502 | ||
784d5858 TS |
503 | gig_dbg(DEBUG_USBREQ, "<-------%d: 0x%02x (%u [0x%02x 0x%02x])", |
504 | urb->actual_length, (int)ucs->int_in_buf[0], l, | |
505 | (int)ucs->int_in_buf[1], (int)ucs->int_in_buf[2]); | |
cf7776dc HL |
506 | |
507 | channel = 0; | |
508 | ||
509 | switch (ucs->int_in_buf[0]) { | |
510 | case HD_DEVICE_INIT_OK: | |
511 | update_basstate(ucs, BS_INIT, 0); | |
512 | break; | |
513 | ||
514 | case HD_READY_SEND_ATDATA: | |
515 | del_timer(&ucs->timer_atrdy); | |
516 | update_basstate(ucs, BS_ATREADY, BS_ATTIMER); | |
517 | start_cbsend(cs); | |
518 | break; | |
519 | ||
520 | case HD_OPEN_B2CHANNEL_ACK: | |
521 | ++channel; | |
522 | case HD_OPEN_B1CHANNEL_ACK: | |
523 | bcs = cs->bcs + channel; | |
524 | update_basstate(ucs, BS_B1OPEN << channel, 0); | |
525 | gigaset_bchannel_up(bcs); | |
526 | break; | |
527 | ||
528 | case HD_OPEN_ATCHANNEL_ACK: | |
529 | update_basstate(ucs, BS_ATOPEN, 0); | |
530 | start_cbsend(cs); | |
531 | break; | |
532 | ||
533 | case HD_CLOSE_B2CHANNEL_ACK: | |
534 | ++channel; | |
535 | case HD_CLOSE_B1CHANNEL_ACK: | |
536 | bcs = cs->bcs + channel; | |
537 | update_basstate(ucs, 0, BS_B1OPEN << channel); | |
538 | stopurbs(bcs->hw.bas); | |
539 | gigaset_bchannel_down(bcs); | |
540 | break; | |
541 | ||
542 | case HD_CLOSE_ATCHANNEL_ACK: | |
543 | update_basstate(ucs, 0, BS_ATOPEN); | |
544 | break; | |
545 | ||
546 | case HD_B2_FLOW_CONTROL: | |
547 | ++channel; | |
548 | case HD_B1_FLOW_CONTROL: | |
549 | bcs = cs->bcs + channel; | |
550 | atomic_add((l - BAS_NORMFRAME) * BAS_CORRFRAMES, | |
784d5858 TS |
551 | &bcs->hw.bas->corrbytes); |
552 | gig_dbg(DEBUG_ISO, | |
553 | "Flow control (channel %d, sub %d): 0x%02x => %d", | |
554 | channel, bcs->hw.bas->numsub, l, | |
555 | atomic_read(&bcs->hw.bas->corrbytes)); | |
cf7776dc HL |
556 | break; |
557 | ||
558 | case HD_RECEIVEATDATA_ACK: /* AT response ready to be received */ | |
559 | if (!l) { | |
784d5858 TS |
560 | dev_warn(cs->dev, |
561 | "HD_RECEIVEATDATA_ACK with length 0 ignored\n"); | |
cf7776dc HL |
562 | break; |
563 | } | |
564 | spin_lock_irqsave(&cs->lock, flags); | |
565 | if (ucs->rcvbuf_size) { | |
566 | spin_unlock_irqrestore(&cs->lock, flags); | |
784d5858 TS |
567 | dev_err(cs->dev, |
568 | "receive AT data overrun, %d bytes lost\n", l); | |
cf7776dc HL |
569 | error_reset(cs); //FIXME reschedule |
570 | break; | |
571 | } | |
572 | if ((ucs->rcvbuf = kmalloc(l, GFP_ATOMIC)) == NULL) { | |
573 | spin_unlock_irqrestore(&cs->lock, flags); | |
784d5858 | 574 | dev_err(cs->dev, "out of memory, %d bytes lost\n", l); |
cf7776dc HL |
575 | error_reset(cs); //FIXME reschedule |
576 | break; | |
577 | } | |
578 | ucs->rcvbuf_size = l; | |
579 | ucs->retry_cmd_in = 0; | |
580 | if ((status = atread_submit(cs, BAS_TIMEOUT)) < 0) { | |
581 | kfree(ucs->rcvbuf); | |
582 | ucs->rcvbuf = NULL; | |
583 | ucs->rcvbuf_size = 0; | |
584 | error_reset(cs); //FIXME reschedule | |
585 | } | |
586 | spin_unlock_irqrestore(&cs->lock, flags); | |
587 | break; | |
588 | ||
589 | case HD_RESET_INTERRUPT_PIPE_ACK: | |
784d5858 | 590 | gig_dbg(DEBUG_USBREQ, "HD_RESET_INTERRUPT_PIPE_ACK"); |
cf7776dc HL |
591 | break; |
592 | ||
593 | case HD_SUSPEND_END: | |
784d5858 | 594 | gig_dbg(DEBUG_USBREQ, "HD_SUSPEND_END"); |
cf7776dc HL |
595 | break; |
596 | ||
597 | default: | |
784d5858 TS |
598 | dev_warn(cs->dev, |
599 | "unknown Gigaset signal 0x%02x (%u) ignored\n", | |
600 | (int) ucs->int_in_buf[0], l); | |
cf7776dc HL |
601 | } |
602 | ||
603 | check_pending(ucs); | |
604 | ||
605 | resubmit: | |
606 | status = usb_submit_urb(urb, SLAB_ATOMIC); | |
607 | if (unlikely(status)) { | |
784d5858 TS |
608 | dev_err(cs->dev, "could not resubmit interrupt URB: %s\n", |
609 | get_usb_statmsg(status)); | |
cf7776dc HL |
610 | error_reset(cs); |
611 | } | |
612 | } | |
613 | ||
614 | /* read_ctrl_callback | |
615 | * USB completion handler for control pipe input | |
616 | * called by the USB subsystem in interrupt context | |
617 | * parameter: | |
618 | * urb USB request block | |
619 | * urb->context = inbuf structure for controller state | |
620 | */ | |
621 | static void read_ctrl_callback(struct urb *urb, struct pt_regs *regs) | |
622 | { | |
d48c7784 TS |
623 | struct inbuf_t *inbuf = urb->context; |
624 | struct cardstate *cs = inbuf->cs; | |
625 | struct bas_cardstate *ucs = cs->hw.bas; | |
626 | int have_data = 0; | |
cf7776dc HL |
627 | unsigned numbytes; |
628 | unsigned long flags; | |
cf7776dc HL |
629 | |
630 | spin_lock_irqsave(&cs->lock, flags); | |
784d5858 | 631 | if (unlikely(!atomic_read(&cs->connected))) { |
cf7776dc HL |
632 | warn("%s: disconnected", __func__); |
633 | spin_unlock_irqrestore(&cs->lock, flags); | |
634 | return; | |
635 | } | |
636 | ||
637 | if (!ucs->rcvbuf_size) { | |
784d5858 | 638 | dev_warn(cs->dev, "%s: no receive in progress\n", __func__); |
cf7776dc HL |
639 | spin_unlock_irqrestore(&cs->lock, flags); |
640 | return; | |
641 | } | |
642 | ||
643 | del_timer(&ucs->timer_cmd_in); | |
644 | ||
645 | switch (urb->status) { | |
646 | case 0: /* normal completion */ | |
647 | numbytes = urb->actual_length; | |
648 | if (unlikely(numbytes == 0)) { | |
784d5858 TS |
649 | dev_warn(cs->dev, |
650 | "control read: empty block received\n"); | |
cf7776dc HL |
651 | goto retry; |
652 | } | |
653 | if (unlikely(numbytes != ucs->rcvbuf_size)) { | |
784d5858 TS |
654 | dev_warn(cs->dev, |
655 | "control read: received %d chars, expected %d\n", | |
656 | numbytes, ucs->rcvbuf_size); | |
cf7776dc HL |
657 | if (numbytes > ucs->rcvbuf_size) |
658 | numbytes = ucs->rcvbuf_size; | |
659 | } | |
660 | ||
661 | /* copy received bytes to inbuf */ | |
662 | have_data = gigaset_fill_inbuf(inbuf, ucs->rcvbuf, numbytes); | |
663 | ||
664 | if (unlikely(numbytes < ucs->rcvbuf_size)) { | |
665 | /* incomplete - resubmit for remaining bytes */ | |
666 | ucs->rcvbuf_size -= numbytes; | |
667 | ucs->retry_cmd_in = 0; | |
668 | goto retry; | |
669 | } | |
670 | break; | |
671 | ||
672 | case -ENOENT: /* canceled */ | |
673 | case -ECONNRESET: /* canceled (async) */ | |
674 | case -EINPROGRESS: /* pending */ | |
675 | /* no action necessary */ | |
784d5858 TS |
676 | gig_dbg(DEBUG_USBREQ, "%s: %s", |
677 | __func__, get_usb_statmsg(urb->status)); | |
cf7776dc HL |
678 | break; |
679 | ||
680 | default: /* severe trouble */ | |
784d5858 TS |
681 | dev_warn(cs->dev, "control read: %s\n", |
682 | get_usb_statmsg(urb->status)); | |
cf7776dc HL |
683 | retry: |
684 | if (ucs->retry_cmd_in++ < BAS_RETRY) { | |
784d5858 TS |
685 | dev_notice(cs->dev, "control read: retry %d\n", |
686 | ucs->retry_cmd_in); | |
cf7776dc HL |
687 | if (atread_submit(cs, BAS_TIMEOUT) >= 0) { |
688 | /* resubmitted - bypass regular exit block */ | |
689 | spin_unlock_irqrestore(&cs->lock, flags); | |
690 | return; | |
691 | } | |
692 | } else { | |
784d5858 TS |
693 | dev_err(cs->dev, |
694 | "control read: giving up after %d tries\n", | |
695 | ucs->retry_cmd_in); | |
cf7776dc HL |
696 | } |
697 | error_reset(cs); | |
698 | } | |
699 | ||
700 | kfree(ucs->rcvbuf); | |
701 | ucs->rcvbuf = NULL; | |
702 | ucs->rcvbuf_size = 0; | |
703 | spin_unlock_irqrestore(&cs->lock, flags); | |
704 | if (have_data) { | |
784d5858 | 705 | gig_dbg(DEBUG_INTR, "%s-->BH", __func__); |
cf7776dc HL |
706 | gigaset_schedule_event(cs); |
707 | } | |
708 | } | |
709 | ||
710 | /* read_iso_callback | |
711 | * USB completion handler for B channel isochronous input | |
712 | * called by the USB subsystem in interrupt context | |
713 | * parameter: | |
714 | * urb USB request block of completed request | |
715 | * urb->context = bc_state structure | |
716 | */ | |
717 | static void read_iso_callback(struct urb *urb, struct pt_regs *regs) | |
718 | { | |
719 | struct bc_state *bcs; | |
720 | struct bas_bc_state *ubc; | |
721 | unsigned long flags; | |
722 | int i, rc; | |
723 | ||
cf7776dc HL |
724 | /* status codes not worth bothering the tasklet with */ |
725 | if (unlikely(urb->status == -ENOENT || urb->status == -ECONNRESET || | |
784d5858 TS |
726 | urb->status == -EINPROGRESS)) { |
727 | gig_dbg(DEBUG_ISO, "%s: %s", | |
728 | __func__, get_usb_statmsg(urb->status)); | |
cf7776dc HL |
729 | return; |
730 | } | |
731 | ||
d48c7784 | 732 | bcs = urb->context; |
cf7776dc | 733 | ubc = bcs->hw.bas; |
cf7776dc HL |
734 | |
735 | spin_lock_irqsave(&ubc->isoinlock, flags); | |
736 | if (likely(ubc->isoindone == NULL)) { | |
737 | /* pass URB to tasklet */ | |
738 | ubc->isoindone = urb; | |
739 | tasklet_schedule(&ubc->rcvd_tasklet); | |
740 | } else { | |
741 | /* tasklet still busy, drop data and resubmit URB */ | |
742 | ubc->loststatus = urb->status; | |
743 | for (i = 0; i < BAS_NUMFRAMES; i++) { | |
744 | ubc->isoinlost += urb->iso_frame_desc[i].actual_length; | |
745 | if (unlikely(urb->iso_frame_desc[i].status != 0 && | |
746 | urb->iso_frame_desc[i].status != -EINPROGRESS)) { | |
747 | ubc->loststatus = urb->iso_frame_desc[i].status; | |
748 | } | |
749 | urb->iso_frame_desc[i].status = 0; | |
750 | urb->iso_frame_desc[i].actual_length = 0; | |
751 | } | |
752 | if (likely(atomic_read(&ubc->running))) { | |
784d5858 TS |
753 | /* urb->dev is clobbered by USB subsystem */ |
754 | urb->dev = bcs->cs->hw.bas->udev; | |
cf7776dc HL |
755 | urb->transfer_flags = URB_ISO_ASAP; |
756 | urb->number_of_packets = BAS_NUMFRAMES; | |
784d5858 TS |
757 | gig_dbg(DEBUG_ISO, "%s: isoc read overrun/resubmit", |
758 | __func__); | |
cf7776dc HL |
759 | rc = usb_submit_urb(urb, SLAB_ATOMIC); |
760 | if (unlikely(rc != 0)) { | |
784d5858 TS |
761 | dev_err(bcs->cs->dev, |
762 | "could not resubmit isochronous read " | |
763 | "URB: %s\n", get_usb_statmsg(rc)); | |
cf7776dc HL |
764 | dump_urb(DEBUG_ISO, "isoc read", urb); |
765 | error_hangup(bcs); | |
766 | } | |
767 | } | |
768 | } | |
769 | spin_unlock_irqrestore(&ubc->isoinlock, flags); | |
770 | } | |
771 | ||
772 | /* write_iso_callback | |
773 | * USB completion handler for B channel isochronous output | |
774 | * called by the USB subsystem in interrupt context | |
775 | * parameter: | |
776 | * urb USB request block of completed request | |
777 | * urb->context = isow_urbctx_t structure | |
778 | */ | |
779 | static void write_iso_callback(struct urb *urb, struct pt_regs *regs) | |
780 | { | |
781 | struct isow_urbctx_t *ucx; | |
782 | struct bas_bc_state *ubc; | |
783 | unsigned long flags; | |
784 | ||
cf7776dc HL |
785 | /* status codes not worth bothering the tasklet with */ |
786 | if (unlikely(urb->status == -ENOENT || urb->status == -ECONNRESET || | |
784d5858 TS |
787 | urb->status == -EINPROGRESS)) { |
788 | gig_dbg(DEBUG_ISO, "%s: %s", | |
789 | __func__, get_usb_statmsg(urb->status)); | |
cf7776dc HL |
790 | return; |
791 | } | |
792 | ||
793 | /* pass URB context to tasklet */ | |
d48c7784 | 794 | ucx = urb->context; |
cf7776dc | 795 | ubc = ucx->bcs->hw.bas; |
cf7776dc HL |
796 | |
797 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
798 | ubc->isooutovfl = ubc->isooutdone; | |
799 | ubc->isooutdone = ucx; | |
800 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
801 | tasklet_schedule(&ubc->sent_tasklet); | |
802 | } | |
803 | ||
804 | /* starturbs | |
805 | * prepare and submit USB request blocks for isochronous input and output | |
806 | * argument: | |
807 | * B channel control structure | |
808 | * return value: | |
809 | * 0 on success | |
810 | * < 0 on error (no URBs submitted) | |
811 | */ | |
812 | static int starturbs(struct bc_state *bcs) | |
813 | { | |
d48c7784 | 814 | struct bas_bc_state *ubc = bcs->hw.bas; |
cf7776dc | 815 | struct urb *urb; |
cf7776dc HL |
816 | int j, k; |
817 | int rc; | |
818 | ||
cf7776dc HL |
819 | /* initialize L2 reception */ |
820 | if (bcs->proto2 == ISDN_PROTO_L2_HDLC) | |
821 | bcs->inputstate |= INS_flag_hunt; | |
822 | ||
823 | /* submit all isochronous input URBs */ | |
824 | atomic_set(&ubc->running, 1); | |
825 | for (k = 0; k < BAS_INURBS; k++) { | |
826 | urb = ubc->isoinurbs[k]; | |
827 | if (!urb) { | |
784d5858 | 828 | dev_err(bcs->cs->dev, "isoinurbs[%d]==NULL\n", k); |
cf7776dc HL |
829 | rc = -EFAULT; |
830 | goto error; | |
831 | } | |
832 | ||
833 | urb->dev = bcs->cs->hw.bas->udev; | |
834 | urb->pipe = usb_rcvisocpipe(urb->dev, 3 + 2 * bcs->channel); | |
835 | urb->transfer_flags = URB_ISO_ASAP; | |
836 | urb->transfer_buffer = ubc->isoinbuf + k * BAS_INBUFSIZE; | |
837 | urb->transfer_buffer_length = BAS_INBUFSIZE; | |
838 | urb->number_of_packets = BAS_NUMFRAMES; | |
839 | urb->interval = BAS_FRAMETIME; | |
840 | urb->complete = read_iso_callback; | |
841 | urb->context = bcs; | |
842 | for (j = 0; j < BAS_NUMFRAMES; j++) { | |
843 | urb->iso_frame_desc[j].offset = j * BAS_MAXFRAME; | |
844 | urb->iso_frame_desc[j].length = BAS_MAXFRAME; | |
845 | urb->iso_frame_desc[j].status = 0; | |
846 | urb->iso_frame_desc[j].actual_length = 0; | |
847 | } | |
848 | ||
849 | dump_urb(DEBUG_ISO, "Initial isoc read", urb); | |
850 | if ((rc = usb_submit_urb(urb, SLAB_ATOMIC)) != 0) { | |
784d5858 TS |
851 | dev_err(bcs->cs->dev, |
852 | "could not submit isochronous read URB %d: %s\n", | |
853 | k, get_usb_statmsg(rc)); | |
cf7776dc HL |
854 | goto error; |
855 | } | |
856 | } | |
857 | ||
858 | /* initialize L2 transmission */ | |
859 | gigaset_isowbuf_init(ubc->isooutbuf, PPP_FLAG); | |
860 | ||
861 | /* set up isochronous output URBs for flag idling */ | |
862 | for (k = 0; k < BAS_OUTURBS; ++k) { | |
863 | urb = ubc->isoouturbs[k].urb; | |
864 | if (!urb) { | |
784d5858 | 865 | dev_err(bcs->cs->dev, "isoouturbs[%d].urb==NULL\n", k); |
cf7776dc HL |
866 | rc = -EFAULT; |
867 | goto error; | |
868 | } | |
869 | urb->dev = bcs->cs->hw.bas->udev; | |
870 | urb->pipe = usb_sndisocpipe(urb->dev, 4 + 2 * bcs->channel); | |
871 | urb->transfer_flags = URB_ISO_ASAP; | |
872 | urb->transfer_buffer = ubc->isooutbuf->data; | |
873 | urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data); | |
874 | urb->number_of_packets = BAS_NUMFRAMES; | |
875 | urb->interval = BAS_FRAMETIME; | |
876 | urb->complete = write_iso_callback; | |
877 | urb->context = &ubc->isoouturbs[k]; | |
878 | for (j = 0; j < BAS_NUMFRAMES; ++j) { | |
879 | urb->iso_frame_desc[j].offset = BAS_OUTBUFSIZE; | |
880 | urb->iso_frame_desc[j].length = BAS_NORMFRAME; | |
881 | urb->iso_frame_desc[j].status = 0; | |
882 | urb->iso_frame_desc[j].actual_length = 0; | |
883 | } | |
884 | ubc->isoouturbs[k].limit = -1; | |
885 | } | |
886 | ||
887 | /* submit two URBs, keep third one */ | |
888 | for (k = 0; k < 2; ++k) { | |
889 | dump_urb(DEBUG_ISO, "Initial isoc write", urb); | |
890 | rc = usb_submit_urb(ubc->isoouturbs[k].urb, SLAB_ATOMIC); | |
891 | if (rc != 0) { | |
784d5858 TS |
892 | dev_err(bcs->cs->dev, |
893 | "could not submit isochronous write URB %d: %s\n", | |
894 | k, get_usb_statmsg(rc)); | |
cf7776dc HL |
895 | goto error; |
896 | } | |
897 | } | |
898 | dump_urb(DEBUG_ISO, "Initial isoc write (free)", urb); | |
899 | ubc->isooutfree = &ubc->isoouturbs[2]; | |
900 | ubc->isooutdone = ubc->isooutovfl = NULL; | |
901 | return 0; | |
902 | error: | |
903 | stopurbs(ubc); | |
904 | return rc; | |
905 | } | |
906 | ||
907 | /* stopurbs | |
908 | * cancel the USB request blocks for isochronous input and output | |
909 | * errors are silently ignored | |
910 | * argument: | |
911 | * B channel control structure | |
912 | */ | |
913 | static void stopurbs(struct bas_bc_state *ubc) | |
914 | { | |
915 | int k, rc; | |
916 | ||
cf7776dc HL |
917 | atomic_set(&ubc->running, 0); |
918 | ||
919 | for (k = 0; k < BAS_INURBS; ++k) { | |
920 | rc = usb_unlink_urb(ubc->isoinurbs[k]); | |
784d5858 TS |
921 | gig_dbg(DEBUG_ISO, |
922 | "%s: isoc input URB %d unlinked, result = %d", | |
923 | __func__, k, rc); | |
cf7776dc HL |
924 | } |
925 | ||
926 | for (k = 0; k < BAS_OUTURBS; ++k) { | |
927 | rc = usb_unlink_urb(ubc->isoouturbs[k].urb); | |
784d5858 TS |
928 | gig_dbg(DEBUG_ISO, |
929 | "%s: isoc output URB %d unlinked, result = %d", | |
930 | __func__, k, rc); | |
cf7776dc HL |
931 | } |
932 | } | |
933 | ||
934 | /* Isochronous Write - Bottom Half */ | |
935 | /* =============================== */ | |
936 | ||
937 | /* submit_iso_write_urb | |
938 | * fill and submit the next isochronous write URB | |
939 | * parameters: | |
940 | * bcs B channel state structure | |
941 | * return value: | |
942 | * number of frames submitted in URB | |
943 | * 0 if URB not submitted because no data available (isooutbuf busy) | |
944 | * error code < 0 on error | |
945 | */ | |
946 | static int submit_iso_write_urb(struct isow_urbctx_t *ucx) | |
947 | { | |
d48c7784 TS |
948 | struct urb *urb = ucx->urb; |
949 | struct bas_bc_state *ubc = ucx->bcs->hw.bas; | |
cf7776dc HL |
950 | struct usb_iso_packet_descriptor *ifd; |
951 | int corrbytes, nframe, rc; | |
952 | ||
784d5858 TS |
953 | /* urb->dev is clobbered by USB subsystem */ |
954 | urb->dev = ucx->bcs->cs->hw.bas->udev; | |
cf7776dc HL |
955 | urb->transfer_flags = URB_ISO_ASAP; |
956 | urb->transfer_buffer = ubc->isooutbuf->data; | |
957 | urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data); | |
958 | ||
959 | for (nframe = 0; nframe < BAS_NUMFRAMES; nframe++) { | |
960 | ifd = &urb->iso_frame_desc[nframe]; | |
961 | ||
962 | /* compute frame length according to flow control */ | |
963 | ifd->length = BAS_NORMFRAME; | |
964 | if ((corrbytes = atomic_read(&ubc->corrbytes)) != 0) { | |
784d5858 TS |
965 | gig_dbg(DEBUG_ISO, "%s: corrbytes=%d", |
966 | __func__, corrbytes); | |
cf7776dc HL |
967 | if (corrbytes > BAS_HIGHFRAME - BAS_NORMFRAME) |
968 | corrbytes = BAS_HIGHFRAME - BAS_NORMFRAME; | |
969 | else if (corrbytes < BAS_LOWFRAME - BAS_NORMFRAME) | |
970 | corrbytes = BAS_LOWFRAME - BAS_NORMFRAME; | |
971 | ifd->length += corrbytes; | |
972 | atomic_add(-corrbytes, &ubc->corrbytes); | |
973 | } | |
cf7776dc HL |
974 | |
975 | /* retrieve block of data to send */ | |
917f5085 TS |
976 | ifd->offset = gigaset_isowbuf_getbytes(ubc->isooutbuf, |
977 | ifd->length); | |
cf7776dc HL |
978 | if (ifd->offset < 0) { |
979 | if (ifd->offset == -EBUSY) { | |
784d5858 TS |
980 | gig_dbg(DEBUG_ISO, |
981 | "%s: buffer busy at frame %d", | |
982 | __func__, nframe); | |
983 | /* tasklet will be restarted from | |
984 | gigaset_send_skb() */ | |
cf7776dc | 985 | } else { |
784d5858 TS |
986 | dev_err(ucx->bcs->cs->dev, |
987 | "%s: buffer error %d at frame %d\n", | |
988 | __func__, ifd->offset, nframe); | |
cf7776dc HL |
989 | return ifd->offset; |
990 | } | |
991 | break; | |
992 | } | |
993 | ucx->limit = atomic_read(&ubc->isooutbuf->nextread); | |
994 | ifd->status = 0; | |
995 | ifd->actual_length = 0; | |
996 | } | |
997 | if ((urb->number_of_packets = nframe) > 0) { | |
998 | if ((rc = usb_submit_urb(urb, SLAB_ATOMIC)) != 0) { | |
784d5858 TS |
999 | dev_err(ucx->bcs->cs->dev, |
1000 | "could not submit isochronous write URB: %s\n", | |
1001 | get_usb_statmsg(rc)); | |
cf7776dc HL |
1002 | dump_urb(DEBUG_ISO, "isoc write", urb); |
1003 | return rc; | |
1004 | } | |
1005 | ++ubc->numsub; | |
1006 | } | |
1007 | return nframe; | |
1008 | } | |
1009 | ||
1010 | /* write_iso_tasklet | |
1011 | * tasklet scheduled when an isochronous output URB from the Gigaset device | |
1012 | * has completed | |
1013 | * parameter: | |
1014 | * data B channel state structure | |
1015 | */ | |
1016 | static void write_iso_tasklet(unsigned long data) | |
1017 | { | |
d48c7784 TS |
1018 | struct bc_state *bcs = (struct bc_state *) data; |
1019 | struct bas_bc_state *ubc = bcs->hw.bas; | |
1020 | struct cardstate *cs = bcs->cs; | |
cf7776dc HL |
1021 | struct isow_urbctx_t *done, *next, *ovfl; |
1022 | struct urb *urb; | |
1023 | struct usb_iso_packet_descriptor *ifd; | |
1024 | int offset; | |
1025 | unsigned long flags; | |
1026 | int i; | |
1027 | struct sk_buff *skb; | |
1028 | int len; | |
1029 | ||
cf7776dc HL |
1030 | /* loop while completed URBs arrive in time */ |
1031 | for (;;) { | |
1032 | if (unlikely(!atomic_read(&cs->connected))) { | |
1033 | warn("%s: disconnected", __func__); | |
1034 | return; | |
1035 | } | |
1036 | ||
1037 | if (unlikely(!(atomic_read(&ubc->running)))) { | |
784d5858 | 1038 | gig_dbg(DEBUG_ISO, "%s: not running", __func__); |
cf7776dc HL |
1039 | return; |
1040 | } | |
1041 | ||
1042 | /* retrieve completed URBs */ | |
1043 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1044 | done = ubc->isooutdone; | |
1045 | ubc->isooutdone = NULL; | |
1046 | ovfl = ubc->isooutovfl; | |
1047 | ubc->isooutovfl = NULL; | |
1048 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1049 | if (ovfl) { | |
784d5858 | 1050 | dev_err(cs->dev, "isochronous write buffer underrun\n"); |
cf7776dc HL |
1051 | error_hangup(bcs); |
1052 | break; | |
1053 | } | |
1054 | if (!done) | |
1055 | break; | |
1056 | ||
1057 | /* submit free URB if available */ | |
1058 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1059 | next = ubc->isooutfree; | |
1060 | ubc->isooutfree = NULL; | |
1061 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1062 | if (next) { | |
1063 | if (submit_iso_write_urb(next) <= 0) { | |
1064 | /* could not submit URB, put it back */ | |
1065 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1066 | if (ubc->isooutfree == NULL) { | |
1067 | ubc->isooutfree = next; | |
1068 | next = NULL; | |
1069 | } | |
1070 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1071 | if (next) { | |
1072 | /* couldn't put it back */ | |
784d5858 TS |
1073 | dev_err(cs->dev, |
1074 | "losing isochronous write URB\n"); | |
cf7776dc HL |
1075 | error_hangup(bcs); |
1076 | } | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | /* process completed URB */ | |
1081 | urb = done->urb; | |
1082 | switch (urb->status) { | |
1083 | case 0: /* normal completion */ | |
1084 | break; | |
1085 | case -EXDEV: /* inspect individual frames */ | |
1086 | /* assumptions (for lack of documentation): | |
917f5085 TS |
1087 | * - actual_length bytes of the frame in error are |
1088 | * successfully sent | |
cf7776dc HL |
1089 | * - all following frames are not sent at all |
1090 | */ | |
784d5858 TS |
1091 | gig_dbg(DEBUG_ISO, "%s: URB partially completed", |
1092 | __func__); | |
cf7776dc HL |
1093 | offset = done->limit; /* just in case */ |
1094 | for (i = 0; i < BAS_NUMFRAMES; i++) { | |
1095 | ifd = &urb->iso_frame_desc[i]; | |
1096 | if (ifd->status || | |
1097 | ifd->actual_length != ifd->length) { | |
784d5858 TS |
1098 | dev_warn(cs->dev, |
1099 | "isochronous write: frame %d: %s, " | |
1100 | "only %d of %d bytes sent\n", | |
cf7776dc HL |
1101 | i, get_usb_statmsg(ifd->status), |
1102 | ifd->actual_length, ifd->length); | |
1103 | offset = (ifd->offset + | |
784d5858 TS |
1104 | ifd->actual_length) |
1105 | % BAS_OUTBUFSIZE; | |
cf7776dc HL |
1106 | break; |
1107 | } | |
1108 | } | |
1109 | #ifdef CONFIG_GIGASET_DEBUG | |
1110 | /* check assumption on remaining frames */ | |
1111 | for (; i < BAS_NUMFRAMES; i++) { | |
1112 | ifd = &urb->iso_frame_desc[i]; | |
1113 | if (ifd->status != -EINPROGRESS | |
1114 | || ifd->actual_length != 0) { | |
784d5858 TS |
1115 | dev_warn(cs->dev, |
1116 | "isochronous write: frame %d: %s, " | |
1117 | "%d of %d bytes sent\n", | |
cf7776dc HL |
1118 | i, get_usb_statmsg(ifd->status), |
1119 | ifd->actual_length, ifd->length); | |
1120 | offset = (ifd->offset + | |
784d5858 TS |
1121 | ifd->actual_length) |
1122 | % BAS_OUTBUFSIZE; | |
cf7776dc HL |
1123 | break; |
1124 | } | |
1125 | } | |
1126 | #endif | |
1127 | break; | |
784d5858 TS |
1128 | case -EPIPE: //FIXME is this the code for "underrun"? |
1129 | dev_err(cs->dev, "isochronous write stalled\n"); | |
cf7776dc HL |
1130 | error_hangup(bcs); |
1131 | break; | |
1132 | default: /* severe trouble */ | |
784d5858 TS |
1133 | dev_warn(cs->dev, "isochronous write: %s\n", |
1134 | get_usb_statmsg(urb->status)); | |
cf7776dc HL |
1135 | } |
1136 | ||
1137 | /* mark the write buffer area covered by this URB as free */ | |
1138 | if (done->limit >= 0) | |
1139 | atomic_set(&ubc->isooutbuf->read, done->limit); | |
1140 | ||
1141 | /* mark URB as free */ | |
1142 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1143 | next = ubc->isooutfree; | |
1144 | ubc->isooutfree = done; | |
1145 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1146 | if (next) { | |
1147 | /* only one URB still active - resubmit one */ | |
1148 | if (submit_iso_write_urb(next) <= 0) { | |
1149 | /* couldn't submit */ | |
1150 | error_hangup(bcs); | |
1151 | } | |
1152 | } | |
1153 | } | |
1154 | ||
1155 | /* process queued SKBs */ | |
1156 | while ((skb = skb_dequeue(&bcs->squeue))) { | |
1157 | /* copy to output buffer, doing L2 encapsulation */ | |
1158 | len = skb->len; | |
1159 | if (gigaset_isoc_buildframe(bcs, skb->data, len) == -EAGAIN) { | |
1160 | /* insufficient buffer space, push back onto queue */ | |
1161 | skb_queue_head(&bcs->squeue, skb); | |
784d5858 TS |
1162 | gig_dbg(DEBUG_ISO, "%s: skb requeued, qlen=%d", |
1163 | __func__, skb_queue_len(&bcs->squeue)); | |
cf7776dc HL |
1164 | break; |
1165 | } | |
1166 | skb_pull(skb, len); | |
1167 | gigaset_skb_sent(bcs, skb); | |
1168 | dev_kfree_skb_any(skb); | |
1169 | } | |
1170 | } | |
1171 | ||
1172 | /* Isochronous Read - Bottom Half */ | |
1173 | /* ============================== */ | |
1174 | ||
1175 | /* read_iso_tasklet | |
1176 | * tasklet scheduled when an isochronous input URB from the Gigaset device | |
1177 | * has completed | |
1178 | * parameter: | |
1179 | * data B channel state structure | |
1180 | */ | |
1181 | static void read_iso_tasklet(unsigned long data) | |
1182 | { | |
d48c7784 TS |
1183 | struct bc_state *bcs = (struct bc_state *) data; |
1184 | struct bas_bc_state *ubc = bcs->hw.bas; | |
1185 | struct cardstate *cs = bcs->cs; | |
cf7776dc HL |
1186 | struct urb *urb; |
1187 | char *rcvbuf; | |
1188 | unsigned long flags; | |
1189 | int totleft, numbytes, offset, frame, rc; | |
1190 | ||
cf7776dc HL |
1191 | /* loop while more completed URBs arrive in the meantime */ |
1192 | for (;;) { | |
784d5858 | 1193 | if (unlikely(!atomic_read(&cs->connected))) { |
cf7776dc HL |
1194 | warn("%s: disconnected", __func__); |
1195 | return; | |
1196 | } | |
1197 | ||
1198 | /* retrieve URB */ | |
1199 | spin_lock_irqsave(&ubc->isoinlock, flags); | |
1200 | if (!(urb = ubc->isoindone)) { | |
1201 | spin_unlock_irqrestore(&ubc->isoinlock, flags); | |
1202 | return; | |
1203 | } | |
1204 | ubc->isoindone = NULL; | |
1205 | if (unlikely(ubc->loststatus != -EINPROGRESS)) { | |
784d5858 TS |
1206 | dev_warn(cs->dev, |
1207 | "isochronous read overrun, " | |
1208 | "dropped URB with status: %s, %d bytes lost\n", | |
1209 | get_usb_statmsg(ubc->loststatus), | |
1210 | ubc->isoinlost); | |
cf7776dc HL |
1211 | ubc->loststatus = -EINPROGRESS; |
1212 | } | |
1213 | spin_unlock_irqrestore(&ubc->isoinlock, flags); | |
1214 | ||
1215 | if (unlikely(!(atomic_read(&ubc->running)))) { | |
784d5858 TS |
1216 | gig_dbg(DEBUG_ISO, |
1217 | "%s: channel not running, " | |
1218 | "dropped URB with status: %s", | |
1219 | __func__, get_usb_statmsg(urb->status)); | |
cf7776dc HL |
1220 | return; |
1221 | } | |
1222 | ||
1223 | switch (urb->status) { | |
1224 | case 0: /* normal completion */ | |
1225 | break; | |
917f5085 TS |
1226 | case -EXDEV: /* inspect individual frames |
1227 | (we do that anyway) */ | |
784d5858 TS |
1228 | gig_dbg(DEBUG_ISO, "%s: URB partially completed", |
1229 | __func__); | |
cf7776dc HL |
1230 | break; |
1231 | case -ENOENT: | |
1232 | case -ECONNRESET: | |
784d5858 | 1233 | gig_dbg(DEBUG_ISO, "%s: URB canceled", __func__); |
cf7776dc HL |
1234 | continue; /* -> skip */ |
1235 | case -EINPROGRESS: /* huh? */ | |
784d5858 | 1236 | gig_dbg(DEBUG_ISO, "%s: URB still pending", __func__); |
cf7776dc HL |
1237 | continue; /* -> skip */ |
1238 | case -EPIPE: | |
784d5858 | 1239 | dev_err(cs->dev, "isochronous read stalled\n"); |
cf7776dc HL |
1240 | error_hangup(bcs); |
1241 | continue; /* -> skip */ | |
1242 | default: /* severe trouble */ | |
784d5858 TS |
1243 | dev_warn(cs->dev, "isochronous read: %s\n", |
1244 | get_usb_statmsg(urb->status)); | |
cf7776dc HL |
1245 | goto error; |
1246 | } | |
1247 | ||
1248 | rcvbuf = urb->transfer_buffer; | |
1249 | totleft = urb->actual_length; | |
1250 | for (frame = 0; totleft > 0 && frame < BAS_NUMFRAMES; frame++) { | |
1251 | if (unlikely(urb->iso_frame_desc[frame].status)) { | |
784d5858 TS |
1252 | dev_warn(cs->dev, |
1253 | "isochronous read: frame %d: %s\n", | |
1254 | frame, | |
1255 | get_usb_statmsg( | |
1256 | urb->iso_frame_desc[frame].status)); | |
cf7776dc HL |
1257 | break; |
1258 | } | |
1259 | numbytes = urb->iso_frame_desc[frame].actual_length; | |
1260 | if (unlikely(numbytes > BAS_MAXFRAME)) { | |
784d5858 TS |
1261 | dev_warn(cs->dev, |
1262 | "isochronous read: frame %d: " | |
1263 | "numbytes (%d) > BAS_MAXFRAME\n", | |
1264 | frame, numbytes); | |
cf7776dc HL |
1265 | break; |
1266 | } | |
1267 | if (unlikely(numbytes > totleft)) { | |
784d5858 TS |
1268 | dev_warn(cs->dev, |
1269 | "isochronous read: frame %d: " | |
1270 | "numbytes (%d) > totleft (%d)\n", | |
1271 | frame, numbytes, totleft); | |
cf7776dc HL |
1272 | break; |
1273 | } | |
1274 | offset = urb->iso_frame_desc[frame].offset; | |
1275 | if (unlikely(offset + numbytes > BAS_INBUFSIZE)) { | |
784d5858 TS |
1276 | dev_warn(cs->dev, |
1277 | "isochronous read: frame %d: " | |
1278 | "offset (%d) + numbytes (%d) " | |
1279 | "> BAS_INBUFSIZE\n", | |
1280 | frame, offset, numbytes); | |
cf7776dc HL |
1281 | break; |
1282 | } | |
1283 | gigaset_isoc_receive(rcvbuf + offset, numbytes, bcs); | |
1284 | totleft -= numbytes; | |
1285 | } | |
1286 | if (unlikely(totleft > 0)) | |
784d5858 TS |
1287 | dev_warn(cs->dev, |
1288 | "isochronous read: %d data bytes missing\n", | |
1289 | totleft); | |
cf7776dc HL |
1290 | |
1291 | error: | |
1292 | /* URB processed, resubmit */ | |
1293 | for (frame = 0; frame < BAS_NUMFRAMES; frame++) { | |
1294 | urb->iso_frame_desc[frame].status = 0; | |
1295 | urb->iso_frame_desc[frame].actual_length = 0; | |
1296 | } | |
784d5858 TS |
1297 | /* urb->dev is clobbered by USB subsystem */ |
1298 | urb->dev = bcs->cs->hw.bas->udev; | |
cf7776dc HL |
1299 | urb->transfer_flags = URB_ISO_ASAP; |
1300 | urb->number_of_packets = BAS_NUMFRAMES; | |
1301 | if ((rc = usb_submit_urb(urb, SLAB_ATOMIC)) != 0) { | |
784d5858 TS |
1302 | dev_err(cs->dev, |
1303 | "could not resubmit isochronous read URB: %s\n", | |
1304 | get_usb_statmsg(rc)); | |
cf7776dc HL |
1305 | dump_urb(DEBUG_ISO, "resubmit iso read", urb); |
1306 | error_hangup(bcs); | |
1307 | } | |
1308 | } | |
1309 | } | |
1310 | ||
1311 | /* Channel Operations */ | |
1312 | /* ================== */ | |
1313 | ||
1314 | /* req_timeout | |
1315 | * timeout routine for control output request | |
1316 | * argument: | |
1317 | * B channel control structure | |
1318 | */ | |
1319 | static void req_timeout(unsigned long data) | |
1320 | { | |
1321 | struct bc_state *bcs = (struct bc_state *) data; | |
d48c7784 | 1322 | struct bas_cardstate *ucs = bcs->cs->hw.bas; |
cf7776dc HL |
1323 | int pending; |
1324 | unsigned long flags; | |
1325 | ||
cf7776dc HL |
1326 | check_pending(ucs); |
1327 | ||
1328 | spin_lock_irqsave(&ucs->lock, flags); | |
1329 | pending = ucs->pending; | |
1330 | ucs->pending = 0; | |
1331 | spin_unlock_irqrestore(&ucs->lock, flags); | |
1332 | ||
1333 | switch (pending) { | |
1334 | case 0: /* no pending request */ | |
784d5858 | 1335 | gig_dbg(DEBUG_USBREQ, "%s: no request pending", __func__); |
cf7776dc HL |
1336 | break; |
1337 | ||
1338 | case HD_OPEN_ATCHANNEL: | |
784d5858 | 1339 | dev_err(bcs->cs->dev, "timeout opening AT channel\n"); |
cf7776dc HL |
1340 | error_reset(bcs->cs); |
1341 | break; | |
1342 | ||
1343 | case HD_OPEN_B2CHANNEL: | |
1344 | case HD_OPEN_B1CHANNEL: | |
784d5858 TS |
1345 | dev_err(bcs->cs->dev, "timeout opening channel %d\n", |
1346 | bcs->channel + 1); | |
cf7776dc HL |
1347 | error_hangup(bcs); |
1348 | break; | |
1349 | ||
1350 | case HD_CLOSE_ATCHANNEL: | |
784d5858 | 1351 | dev_err(bcs->cs->dev, "timeout closing AT channel\n"); |
cf7776dc HL |
1352 | break; |
1353 | ||
1354 | case HD_CLOSE_B2CHANNEL: | |
1355 | case HD_CLOSE_B1CHANNEL: | |
784d5858 TS |
1356 | dev_err(bcs->cs->dev, "timeout closing channel %d\n", |
1357 | bcs->channel + 1); | |
cf7776dc HL |
1358 | break; |
1359 | ||
1360 | default: | |
784d5858 TS |
1361 | dev_warn(bcs->cs->dev, "request 0x%02x timed out, clearing\n", |
1362 | pending); | |
cf7776dc HL |
1363 | } |
1364 | } | |
1365 | ||
1366 | /* write_ctrl_callback | |
1367 | * USB completion handler for control pipe output | |
1368 | * called by the USB subsystem in interrupt context | |
1369 | * parameter: | |
1370 | * urb USB request block of completed request | |
1371 | * urb->context = hardware specific controller state structure | |
1372 | */ | |
1373 | static void write_ctrl_callback(struct urb *urb, struct pt_regs *regs) | |
1374 | { | |
d48c7784 | 1375 | struct bas_cardstate *ucs = urb->context; |
cf7776dc HL |
1376 | unsigned long flags; |
1377 | ||
cf7776dc HL |
1378 | spin_lock_irqsave(&ucs->lock, flags); |
1379 | if (urb->status && ucs->pending) { | |
784d5858 TS |
1380 | dev_err(&ucs->interface->dev, |
1381 | "control request 0x%02x failed: %s\n", | |
1382 | ucs->pending, get_usb_statmsg(urb->status)); | |
cf7776dc HL |
1383 | del_timer(&ucs->timer_ctrl); |
1384 | ucs->pending = 0; | |
1385 | } | |
1386 | /* individual handling of specific request types */ | |
1387 | switch (ucs->pending) { | |
1388 | case HD_DEVICE_INIT_ACK: /* no reply expected */ | |
1389 | ucs->pending = 0; | |
1390 | break; | |
1391 | } | |
1392 | spin_unlock_irqrestore(&ucs->lock, flags); | |
1393 | } | |
1394 | ||
1395 | /* req_submit | |
1396 | * submit a control output request without message buffer to the Gigaset base | |
1397 | * and optionally start a timeout | |
1398 | * parameters: | |
1399 | * bcs B channel control structure | |
1400 | * req control request code (HD_*) | |
1401 | * val control request parameter value (set to 0 if unused) | |
1402 | * timeout timeout in seconds (0: no timeout) | |
1403 | * return value: | |
1404 | * 0 on success | |
1405 | * -EINVAL if a NULL pointer is encountered somewhere | |
1406 | * -EBUSY if another request is pending | |
1407 | * any URB submission error code | |
1408 | */ | |
1409 | static int req_submit(struct bc_state *bcs, int req, int val, int timeout) | |
1410 | { | |
d48c7784 | 1411 | struct bas_cardstate *ucs = bcs->cs->hw.bas; |
cf7776dc HL |
1412 | int ret; |
1413 | unsigned long flags; | |
1414 | ||
784d5858 | 1415 | gig_dbg(DEBUG_USBREQ, "-------> 0x%02x (%d)", req, val); |
cf7776dc HL |
1416 | |
1417 | spin_lock_irqsave(&ucs->lock, flags); | |
1418 | if (ucs->pending) { | |
1419 | spin_unlock_irqrestore(&ucs->lock, flags); | |
784d5858 TS |
1420 | dev_err(bcs->cs->dev, |
1421 | "submission of request 0x%02x failed: " | |
1422 | "request 0x%02x still pending\n", | |
1423 | req, ucs->pending); | |
cf7776dc HL |
1424 | return -EBUSY; |
1425 | } | |
1426 | if (ucs->urb_ctrl->status == -EINPROGRESS) { | |
1427 | spin_unlock_irqrestore(&ucs->lock, flags); | |
784d5858 TS |
1428 | dev_err(bcs->cs->dev, |
1429 | "could not submit request 0x%02x: URB busy\n", req); | |
cf7776dc HL |
1430 | return -EBUSY; |
1431 | } | |
1432 | ||
1433 | ucs->dr_ctrl.bRequestType = OUT_VENDOR_REQ; | |
1434 | ucs->dr_ctrl.bRequest = req; | |
1435 | ucs->dr_ctrl.wValue = cpu_to_le16(val); | |
1436 | ucs->dr_ctrl.wIndex = 0; | |
1437 | ucs->dr_ctrl.wLength = 0; | |
1438 | usb_fill_control_urb(ucs->urb_ctrl, ucs->udev, | |
784d5858 TS |
1439 | usb_sndctrlpipe(ucs->udev, 0), |
1440 | (unsigned char*) &ucs->dr_ctrl, NULL, 0, | |
1441 | write_ctrl_callback, ucs); | |
cf7776dc | 1442 | if ((ret = usb_submit_urb(ucs->urb_ctrl, SLAB_ATOMIC)) != 0) { |
784d5858 TS |
1443 | dev_err(bcs->cs->dev, "could not submit request 0x%02x: %s\n", |
1444 | req, get_usb_statmsg(ret)); | |
cf7776dc HL |
1445 | spin_unlock_irqrestore(&ucs->lock, flags); |
1446 | return ret; | |
1447 | } | |
1448 | ucs->pending = req; | |
1449 | ||
1450 | if (timeout > 0) { | |
784d5858 | 1451 | gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout); |
cf7776dc HL |
1452 | ucs->timer_ctrl.expires = jiffies + timeout * HZ / 10; |
1453 | ucs->timer_ctrl.data = (unsigned long) bcs; | |
1454 | ucs->timer_ctrl.function = req_timeout; | |
1455 | add_timer(&ucs->timer_ctrl); | |
1456 | } | |
1457 | ||
1458 | spin_unlock_irqrestore(&ucs->lock, flags); | |
1459 | return 0; | |
1460 | } | |
1461 | ||
1462 | /* gigaset_init_bchannel | |
1463 | * called by common.c to connect a B channel | |
1464 | * initialize isochronous I/O and tell the Gigaset base to open the channel | |
1465 | * argument: | |
1466 | * B channel control structure | |
1467 | * return value: | |
1468 | * 0 on success, error code < 0 on error | |
1469 | */ | |
1470 | static int gigaset_init_bchannel(struct bc_state *bcs) | |
1471 | { | |
1472 | int req, ret; | |
1473 | ||
cf7776dc | 1474 | if ((ret = starturbs(bcs)) < 0) { |
784d5858 TS |
1475 | dev_err(bcs->cs->dev, |
1476 | "could not start isochronous I/O for channel %d\n", | |
1477 | bcs->channel + 1); | |
cf7776dc HL |
1478 | error_hangup(bcs); |
1479 | return ret; | |
1480 | } | |
1481 | ||
1482 | req = bcs->channel ? HD_OPEN_B2CHANNEL : HD_OPEN_B1CHANNEL; | |
1483 | if ((ret = req_submit(bcs, req, 0, BAS_TIMEOUT)) < 0) { | |
784d5858 TS |
1484 | dev_err(bcs->cs->dev, "could not open channel %d: %s\n", |
1485 | bcs->channel + 1, get_usb_statmsg(ret)); | |
cf7776dc HL |
1486 | stopurbs(bcs->hw.bas); |
1487 | error_hangup(bcs); | |
1488 | } | |
1489 | return ret; | |
1490 | } | |
1491 | ||
1492 | /* gigaset_close_bchannel | |
1493 | * called by common.c to disconnect a B channel | |
1494 | * tell the Gigaset base to close the channel | |
1495 | * stopping isochronous I/O and LL notification will be done when the | |
1496 | * acknowledgement for the close arrives | |
1497 | * argument: | |
1498 | * B channel control structure | |
1499 | * return value: | |
1500 | * 0 on success, error code < 0 on error | |
1501 | */ | |
1502 | static int gigaset_close_bchannel(struct bc_state *bcs) | |
1503 | { | |
1504 | int req, ret; | |
1505 | ||
cf7776dc HL |
1506 | if (!(atomic_read(&bcs->cs->hw.bas->basstate) & |
1507 | (bcs->channel ? BS_B2OPEN : BS_B1OPEN))) { | |
1508 | /* channel not running: just signal common.c */ | |
1509 | gigaset_bchannel_down(bcs); | |
1510 | return 0; | |
1511 | } | |
1512 | ||
1513 | req = bcs->channel ? HD_CLOSE_B2CHANNEL : HD_CLOSE_B1CHANNEL; | |
1514 | if ((ret = req_submit(bcs, req, 0, BAS_TIMEOUT)) < 0) | |
784d5858 TS |
1515 | dev_err(bcs->cs->dev, |
1516 | "could not submit HD_CLOSE_BxCHANNEL request: %s\n", | |
1517 | get_usb_statmsg(ret)); | |
cf7776dc HL |
1518 | return ret; |
1519 | } | |
1520 | ||
1521 | /* Device Operations */ | |
1522 | /* ================= */ | |
1523 | ||
1524 | /* complete_cb | |
1525 | * unqueue first command buffer from queue, waking any sleepers | |
1526 | * must be called with cs->cmdlock held | |
1527 | * parameter: | |
1528 | * cs controller state structure | |
1529 | */ | |
1530 | static void complete_cb(struct cardstate *cs) | |
1531 | { | |
d48c7784 | 1532 | struct cmdbuf_t *cb = cs->cmdbuf; |
cf7776dc HL |
1533 | |
1534 | /* unqueue completed buffer */ | |
1535 | cs->cmdbytes -= cs->curlen; | |
784d5858 TS |
1536 | gig_dbg(DEBUG_TRANSCMD|DEBUG_LOCKCMD, |
1537 | "write_command: sent %u bytes, %u left", | |
1538 | cs->curlen, cs->cmdbytes); | |
cf7776dc HL |
1539 | if ((cs->cmdbuf = cb->next) != NULL) { |
1540 | cs->cmdbuf->prev = NULL; | |
1541 | cs->curlen = cs->cmdbuf->len; | |
1542 | } else { | |
1543 | cs->lastcmdbuf = NULL; | |
1544 | cs->curlen = 0; | |
1545 | } | |
1546 | ||
1547 | if (cb->wake_tasklet) | |
1548 | tasklet_schedule(cb->wake_tasklet); | |
1549 | ||
1550 | kfree(cb); | |
1551 | } | |
1552 | ||
1553 | static int atwrite_submit(struct cardstate *cs, unsigned char *buf, int len); | |
1554 | ||
1555 | /* write_command_callback | |
1556 | * USB completion handler for AT command transmission | |
1557 | * called by the USB subsystem in interrupt context | |
1558 | * parameter: | |
1559 | * urb USB request block of completed request | |
1560 | * urb->context = controller state structure | |
1561 | */ | |
1562 | static void write_command_callback(struct urb *urb, struct pt_regs *regs) | |
1563 | { | |
d48c7784 TS |
1564 | struct cardstate *cs = urb->context; |
1565 | struct bas_cardstate *ucs = cs->hw.bas; | |
cf7776dc | 1566 | unsigned long flags; |
cf7776dc HL |
1567 | |
1568 | /* check status */ | |
1569 | switch (urb->status) { | |
1570 | case 0: /* normal completion */ | |
1571 | break; | |
1572 | case -ENOENT: /* canceled */ | |
1573 | case -ECONNRESET: /* canceled (async) */ | |
1574 | case -EINPROGRESS: /* pending */ | |
1575 | /* ignore silently */ | |
784d5858 TS |
1576 | gig_dbg(DEBUG_USBREQ, "%s: %s", |
1577 | __func__, get_usb_statmsg(urb->status)); | |
cf7776dc HL |
1578 | return; |
1579 | default: /* any failure */ | |
1580 | if (++ucs->retry_cmd_out > BAS_RETRY) { | |
784d5858 TS |
1581 | dev_warn(cs->dev, |
1582 | "command write: %s, " | |
1583 | "giving up after %d retries\n", | |
1584 | get_usb_statmsg(urb->status), | |
1585 | ucs->retry_cmd_out); | |
cf7776dc HL |
1586 | break; |
1587 | } | |
1588 | if (cs->cmdbuf == NULL) { | |
784d5858 TS |
1589 | dev_warn(cs->dev, |
1590 | "command write: %s, " | |
1591 | "cannot retry - cmdbuf gone\n", | |
1592 | get_usb_statmsg(urb->status)); | |
cf7776dc HL |
1593 | break; |
1594 | } | |
784d5858 TS |
1595 | dev_notice(cs->dev, "command write: %s, retry %d\n", |
1596 | get_usb_statmsg(urb->status), ucs->retry_cmd_out); | |
cf7776dc HL |
1597 | if (atwrite_submit(cs, cs->cmdbuf->buf, cs->cmdbuf->len) >= 0) |
1598 | /* resubmitted - bypass regular exit block */ | |
1599 | return; | |
1600 | /* command send failed, assume base still waiting */ | |
1601 | update_basstate(ucs, BS_ATREADY, 0); | |
1602 | } | |
1603 | ||
1604 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1605 | if (cs->cmdbuf != NULL) | |
1606 | complete_cb(cs); | |
1607 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1608 | } | |
1609 | ||
1610 | /* atrdy_timeout | |
1611 | * timeout routine for AT command transmission | |
1612 | * argument: | |
1613 | * controller state structure | |
1614 | */ | |
1615 | static void atrdy_timeout(unsigned long data) | |
1616 | { | |
1617 | struct cardstate *cs = (struct cardstate *) data; | |
d48c7784 | 1618 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc | 1619 | |
784d5858 | 1620 | dev_warn(cs->dev, "timeout waiting for HD_READY_SEND_ATDATA\n"); |
cf7776dc HL |
1621 | |
1622 | /* fake the missing signal - what else can I do? */ | |
1623 | update_basstate(ucs, BS_ATREADY, BS_ATTIMER); | |
1624 | start_cbsend(cs); | |
1625 | } | |
1626 | ||
1627 | /* atwrite_submit | |
1628 | * submit an HD_WRITE_ATMESSAGE command URB | |
1629 | * parameters: | |
1630 | * cs controller state structure | |
1631 | * buf buffer containing command to send | |
1632 | * len length of command to send | |
1633 | * return value: | |
1634 | * 0 on success | |
1635 | * -EFAULT if a NULL pointer is encountered somewhere | |
1636 | * -EBUSY if another request is pending | |
1637 | * any URB submission error code | |
1638 | */ | |
1639 | static int atwrite_submit(struct cardstate *cs, unsigned char *buf, int len) | |
1640 | { | |
d48c7784 | 1641 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc HL |
1642 | int ret; |
1643 | ||
784d5858 | 1644 | gig_dbg(DEBUG_USBREQ, "-------> HD_WRITE_ATMESSAGE (%d)", len); |
cf7776dc HL |
1645 | |
1646 | if (ucs->urb_cmd_out->status == -EINPROGRESS) { | |
784d5858 TS |
1647 | dev_err(cs->dev, |
1648 | "could not submit HD_WRITE_ATMESSAGE: URB busy\n"); | |
cf7776dc HL |
1649 | return -EBUSY; |
1650 | } | |
1651 | ||
1652 | ucs->dr_cmd_out.bRequestType = OUT_VENDOR_REQ; | |
1653 | ucs->dr_cmd_out.bRequest = HD_WRITE_ATMESSAGE; | |
1654 | ucs->dr_cmd_out.wValue = 0; | |
1655 | ucs->dr_cmd_out.wIndex = 0; | |
1656 | ucs->dr_cmd_out.wLength = cpu_to_le16(len); | |
1657 | usb_fill_control_urb(ucs->urb_cmd_out, ucs->udev, | |
1658 | usb_sndctrlpipe(ucs->udev, 0), | |
1659 | (unsigned char*) &ucs->dr_cmd_out, buf, len, | |
1660 | write_command_callback, cs); | |
1661 | ||
1662 | if ((ret = usb_submit_urb(ucs->urb_cmd_out, SLAB_ATOMIC)) != 0) { | |
784d5858 TS |
1663 | dev_err(cs->dev, "could not submit HD_WRITE_ATMESSAGE: %s\n", |
1664 | get_usb_statmsg(ret)); | |
cf7776dc HL |
1665 | return ret; |
1666 | } | |
1667 | ||
1668 | /* submitted successfully */ | |
1669 | update_basstate(ucs, 0, BS_ATREADY); | |
1670 | ||
1671 | /* start timeout if necessary */ | |
1672 | if (!(atomic_read(&ucs->basstate) & BS_ATTIMER)) { | |
784d5858 TS |
1673 | gig_dbg(DEBUG_OUTPUT, "setting ATREADY timeout of %d/10 secs", |
1674 | ATRDY_TIMEOUT); | |
cf7776dc HL |
1675 | ucs->timer_atrdy.expires = jiffies + ATRDY_TIMEOUT * HZ / 10; |
1676 | ucs->timer_atrdy.data = (unsigned long) cs; | |
1677 | ucs->timer_atrdy.function = atrdy_timeout; | |
1678 | add_timer(&ucs->timer_atrdy); | |
1679 | update_basstate(ucs, BS_ATTIMER, 0); | |
1680 | } | |
1681 | return 0; | |
1682 | } | |
1683 | ||
1684 | /* start_cbsend | |
1685 | * start transmission of AT command queue if necessary | |
1686 | * parameter: | |
1687 | * cs controller state structure | |
1688 | * return value: | |
1689 | * 0 on success | |
1690 | * error code < 0 on error | |
1691 | */ | |
1692 | static int start_cbsend(struct cardstate *cs) | |
1693 | { | |
1694 | struct cmdbuf_t *cb; | |
d48c7784 | 1695 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc HL |
1696 | unsigned long flags; |
1697 | int rc; | |
1698 | int retval = 0; | |
1699 | ||
cf7776dc HL |
1700 | /* check if AT channel is open */ |
1701 | if (!(atomic_read(&ucs->basstate) & BS_ATOPEN)) { | |
784d5858 | 1702 | gig_dbg(DEBUG_TRANSCMD|DEBUG_LOCKCMD, "AT channel not open"); |
cf7776dc HL |
1703 | rc = req_submit(cs->bcs, HD_OPEN_ATCHANNEL, 0, BAS_TIMEOUT); |
1704 | if (rc < 0) { | |
784d5858 | 1705 | dev_err(cs->dev, "could not open AT channel\n"); |
cf7776dc HL |
1706 | /* flush command queue */ |
1707 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1708 | while (cs->cmdbuf != NULL) | |
1709 | complete_cb(cs); | |
1710 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1711 | } | |
1712 | return rc; | |
1713 | } | |
1714 | ||
1715 | /* try to send first command in queue */ | |
1716 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1717 | ||
1718 | while ((cb = cs->cmdbuf) != NULL && | |
1719 | atomic_read(&ucs->basstate) & BS_ATREADY) { | |
1720 | ucs->retry_cmd_out = 0; | |
1721 | rc = atwrite_submit(cs, cb->buf, cb->len); | |
1722 | if (unlikely(rc)) { | |
1723 | retval = rc; | |
1724 | complete_cb(cs); | |
1725 | } | |
1726 | } | |
1727 | ||
1728 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1729 | return retval; | |
1730 | } | |
1731 | ||
1732 | /* gigaset_write_cmd | |
1733 | * This function is called by the device independent part of the driver | |
1734 | * to transmit an AT command string to the Gigaset device. | |
1735 | * It encapsulates the device specific method for transmission over the | |
1736 | * direct USB connection to the base. | |
1737 | * The command string is added to the queue of commands to send, and | |
1738 | * USB transmission is started if necessary. | |
1739 | * parameters: | |
1740 | * cs controller state structure | |
1741 | * buf command string to send | |
1742 | * len number of bytes to send (max. IF_WRITEBUF) | |
917f5085 TS |
1743 | * wake_tasklet tasklet to run when transmission is completed |
1744 | * (NULL if none) | |
cf7776dc HL |
1745 | * return value: |
1746 | * number of bytes queued on success | |
1747 | * error code < 0 on error | |
1748 | */ | |
1749 | static int gigaset_write_cmd(struct cardstate *cs, | |
784d5858 TS |
1750 | const unsigned char *buf, int len, |
1751 | struct tasklet_struct *wake_tasklet) | |
cf7776dc HL |
1752 | { |
1753 | struct cmdbuf_t *cb; | |
1754 | unsigned long flags; | |
1755 | int status; | |
1756 | ||
1757 | gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ? | |
784d5858 | 1758 | DEBUG_TRANSCMD : DEBUG_LOCKCMD, |
01371500 | 1759 | "CMD Transmit", len, buf); |
cf7776dc | 1760 | |
784d5858 TS |
1761 | if (unlikely(!atomic_read(&cs->connected))) { |
1762 | err("%s: disconnected", __func__); | |
cf7776dc HL |
1763 | return -ENODEV; |
1764 | } | |
1765 | ||
1766 | if (len <= 0) | |
1767 | return 0; /* nothing to do */ | |
1768 | ||
1769 | if (len > IF_WRITEBUF) | |
1770 | len = IF_WRITEBUF; | |
1771 | if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) { | |
784d5858 | 1772 | dev_err(cs->dev, "%s: out of memory\n", __func__); |
cf7776dc HL |
1773 | return -ENOMEM; |
1774 | } | |
1775 | ||
1776 | memcpy(cb->buf, buf, len); | |
1777 | cb->len = len; | |
1778 | cb->offset = 0; | |
1779 | cb->next = NULL; | |
1780 | cb->wake_tasklet = wake_tasklet; | |
1781 | ||
1782 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1783 | cb->prev = cs->lastcmdbuf; | |
1784 | if (cs->lastcmdbuf) | |
1785 | cs->lastcmdbuf->next = cb; | |
1786 | else { | |
1787 | cs->cmdbuf = cb; | |
1788 | cs->curlen = len; | |
1789 | } | |
1790 | cs->cmdbytes += len; | |
1791 | cs->lastcmdbuf = cb; | |
1792 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1793 | ||
1794 | status = start_cbsend(cs); | |
1795 | ||
1796 | return status < 0 ? status : len; | |
1797 | } | |
1798 | ||
1799 | /* gigaset_write_room | |
1800 | * tty_driver.write_room interface routine | |
917f5085 TS |
1801 | * return number of characters the driver will accept to be written via |
1802 | * gigaset_write_cmd | |
cf7776dc HL |
1803 | * parameter: |
1804 | * controller state structure | |
1805 | * return value: | |
1806 | * number of characters | |
1807 | */ | |
1808 | static int gigaset_write_room(struct cardstate *cs) | |
1809 | { | |
1810 | return IF_WRITEBUF; | |
1811 | } | |
1812 | ||
1813 | /* gigaset_chars_in_buffer | |
1814 | * tty_driver.chars_in_buffer interface routine | |
1815 | * return number of characters waiting to be sent | |
1816 | * parameter: | |
1817 | * controller state structure | |
1818 | * return value: | |
1819 | * number of characters | |
1820 | */ | |
1821 | static int gigaset_chars_in_buffer(struct cardstate *cs) | |
1822 | { | |
1823 | unsigned long flags; | |
1824 | unsigned bytes; | |
1825 | ||
1826 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1827 | bytes = cs->cmdbytes; | |
1828 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1829 | ||
1830 | return bytes; | |
1831 | } | |
1832 | ||
1833 | /* gigaset_brkchars | |
1834 | * implementation of ioctl(GIGASET_BRKCHARS) | |
1835 | * parameter: | |
1836 | * controller state structure | |
1837 | * return value: | |
1838 | * -EINVAL (unimplemented function) | |
1839 | */ | |
1840 | static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6]) | |
1841 | { | |
1842 | return -EINVAL; | |
1843 | } | |
1844 | ||
1845 | ||
1846 | /* Device Initialization/Shutdown */ | |
1847 | /* ============================== */ | |
1848 | ||
1849 | /* Free hardware dependent part of the B channel structure | |
1850 | * parameter: | |
1851 | * bcs B channel structure | |
1852 | * return value: | |
1853 | * !=0 on success | |
1854 | */ | |
1855 | static int gigaset_freebcshw(struct bc_state *bcs) | |
1856 | { | |
1857 | if (!bcs->hw.bas) | |
1858 | return 0; | |
1859 | ||
1860 | if (bcs->hw.bas->isooutbuf) | |
1861 | kfree(bcs->hw.bas->isooutbuf); | |
1862 | kfree(bcs->hw.bas); | |
1863 | bcs->hw.bas = NULL; | |
1864 | return 1; | |
1865 | } | |
1866 | ||
1867 | /* Initialize hardware dependent part of the B channel structure | |
1868 | * parameter: | |
1869 | * bcs B channel structure | |
1870 | * return value: | |
1871 | * !=0 on success | |
1872 | */ | |
1873 | static int gigaset_initbcshw(struct bc_state *bcs) | |
1874 | { | |
1875 | int i; | |
1876 | struct bas_bc_state *ubc; | |
1877 | ||
1878 | bcs->hw.bas = ubc = kmalloc(sizeof(struct bas_bc_state), GFP_KERNEL); | |
1879 | if (!ubc) { | |
1880 | err("could not allocate bas_bc_state"); | |
1881 | return 0; | |
1882 | } | |
1883 | ||
1884 | atomic_set(&ubc->running, 0); | |
1885 | atomic_set(&ubc->corrbytes, 0); | |
1886 | spin_lock_init(&ubc->isooutlock); | |
1887 | for (i = 0; i < BAS_OUTURBS; ++i) { | |
1888 | ubc->isoouturbs[i].urb = NULL; | |
1889 | ubc->isoouturbs[i].bcs = bcs; | |
1890 | } | |
1891 | ubc->isooutdone = ubc->isooutfree = ubc->isooutovfl = NULL; | |
1892 | ubc->numsub = 0; | |
1893 | if (!(ubc->isooutbuf = kmalloc(sizeof(struct isowbuf_t), GFP_KERNEL))) { | |
1894 | err("could not allocate isochronous output buffer"); | |
1895 | kfree(ubc); | |
1896 | bcs->hw.bas = NULL; | |
1897 | return 0; | |
1898 | } | |
1899 | tasklet_init(&ubc->sent_tasklet, | |
784d5858 | 1900 | &write_iso_tasklet, (unsigned long) bcs); |
cf7776dc HL |
1901 | |
1902 | spin_lock_init(&ubc->isoinlock); | |
1903 | for (i = 0; i < BAS_INURBS; ++i) | |
1904 | ubc->isoinurbs[i] = NULL; | |
1905 | ubc->isoindone = NULL; | |
1906 | ubc->loststatus = -EINPROGRESS; | |
1907 | ubc->isoinlost = 0; | |
1908 | ubc->seqlen = 0; | |
1909 | ubc->inbyte = 0; | |
1910 | ubc->inbits = 0; | |
1911 | ubc->goodbytes = 0; | |
1912 | ubc->alignerrs = 0; | |
1913 | ubc->fcserrs = 0; | |
1914 | ubc->frameerrs = 0; | |
1915 | ubc->giants = 0; | |
1916 | ubc->runts = 0; | |
1917 | ubc->aborts = 0; | |
1918 | ubc->shared0s = 0; | |
1919 | ubc->stolen0s = 0; | |
1920 | tasklet_init(&ubc->rcvd_tasklet, | |
784d5858 | 1921 | &read_iso_tasklet, (unsigned long) bcs); |
cf7776dc HL |
1922 | return 1; |
1923 | } | |
1924 | ||
1925 | static void gigaset_reinitbcshw(struct bc_state *bcs) | |
1926 | { | |
1927 | struct bas_bc_state *ubc = bcs->hw.bas; | |
1928 | ||
1929 | atomic_set(&bcs->hw.bas->running, 0); | |
1930 | atomic_set(&bcs->hw.bas->corrbytes, 0); | |
1931 | bcs->hw.bas->numsub = 0; | |
1932 | spin_lock_init(&ubc->isooutlock); | |
1933 | spin_lock_init(&ubc->isoinlock); | |
1934 | ubc->loststatus = -EINPROGRESS; | |
1935 | } | |
1936 | ||
1937 | static void gigaset_freecshw(struct cardstate *cs) | |
1938 | { | |
1939 | struct bas_cardstate *ucs = cs->hw.bas; | |
1940 | ||
1941 | del_timer(&ucs->timer_ctrl); | |
1942 | del_timer(&ucs->timer_atrdy); | |
1943 | del_timer(&ucs->timer_cmd_in); | |
1944 | ||
1945 | kfree(cs->hw.bas); | |
1946 | } | |
1947 | ||
1948 | static int gigaset_initcshw(struct cardstate *cs) | |
1949 | { | |
1950 | struct bas_cardstate *ucs; | |
1951 | ||
1952 | cs->hw.bas = ucs = kmalloc(sizeof *ucs, GFP_KERNEL); | |
1953 | if (!ucs) | |
1954 | return 0; | |
1955 | ||
1956 | ucs->urb_cmd_in = NULL; | |
1957 | ucs->urb_cmd_out = NULL; | |
1958 | ucs->rcvbuf = NULL; | |
1959 | ucs->rcvbuf_size = 0; | |
1960 | ||
1961 | spin_lock_init(&ucs->lock); | |
1962 | ucs->pending = 0; | |
1963 | ||
1964 | atomic_set(&ucs->basstate, 0); | |
1965 | init_timer(&ucs->timer_ctrl); | |
1966 | init_timer(&ucs->timer_atrdy); | |
1967 | init_timer(&ucs->timer_cmd_in); | |
1968 | ||
1969 | return 1; | |
1970 | } | |
1971 | ||
1972 | /* freeurbs | |
1973 | * unlink and deallocate all URBs unconditionally | |
1974 | * caller must make sure that no commands are still in progress | |
1975 | * parameter: | |
1976 | * cs controller state structure | |
1977 | */ | |
1978 | static void freeurbs(struct cardstate *cs) | |
1979 | { | |
d48c7784 | 1980 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc HL |
1981 | struct bas_bc_state *ubc; |
1982 | int i, j; | |
1983 | ||
cf7776dc HL |
1984 | for (j = 0; j < 2; ++j) { |
1985 | ubc = cs->bcs[j].hw.bas; | |
cf7776dc HL |
1986 | for (i = 0; i < BAS_OUTURBS; ++i) |
1987 | if (ubc->isoouturbs[i].urb) { | |
1988 | usb_kill_urb(ubc->isoouturbs[i].urb); | |
784d5858 TS |
1989 | gig_dbg(DEBUG_INIT, |
1990 | "%s: isoc output URB %d/%d unlinked", | |
1991 | __func__, j, i); | |
cf7776dc HL |
1992 | usb_free_urb(ubc->isoouturbs[i].urb); |
1993 | ubc->isoouturbs[i].urb = NULL; | |
1994 | } | |
1995 | for (i = 0; i < BAS_INURBS; ++i) | |
1996 | if (ubc->isoinurbs[i]) { | |
1997 | usb_kill_urb(ubc->isoinurbs[i]); | |
784d5858 TS |
1998 | gig_dbg(DEBUG_INIT, |
1999 | "%s: isoc input URB %d/%d unlinked", | |
2000 | __func__, j, i); | |
cf7776dc HL |
2001 | usb_free_urb(ubc->isoinurbs[i]); |
2002 | ubc->isoinurbs[i] = NULL; | |
2003 | } | |
2004 | } | |
2005 | if (ucs->urb_int_in) { | |
2006 | usb_kill_urb(ucs->urb_int_in); | |
784d5858 TS |
2007 | gig_dbg(DEBUG_INIT, "%s: interrupt input URB unlinked", |
2008 | __func__); | |
cf7776dc HL |
2009 | usb_free_urb(ucs->urb_int_in); |
2010 | ucs->urb_int_in = NULL; | |
2011 | } | |
2012 | if (ucs->urb_cmd_out) { | |
2013 | usb_kill_urb(ucs->urb_cmd_out); | |
784d5858 TS |
2014 | gig_dbg(DEBUG_INIT, "%s: command output URB unlinked", |
2015 | __func__); | |
cf7776dc HL |
2016 | usb_free_urb(ucs->urb_cmd_out); |
2017 | ucs->urb_cmd_out = NULL; | |
2018 | } | |
2019 | if (ucs->urb_cmd_in) { | |
2020 | usb_kill_urb(ucs->urb_cmd_in); | |
784d5858 TS |
2021 | gig_dbg(DEBUG_INIT, "%s: command input URB unlinked", |
2022 | __func__); | |
cf7776dc HL |
2023 | usb_free_urb(ucs->urb_cmd_in); |
2024 | ucs->urb_cmd_in = NULL; | |
2025 | } | |
2026 | if (ucs->urb_ctrl) { | |
2027 | usb_kill_urb(ucs->urb_ctrl); | |
784d5858 TS |
2028 | gig_dbg(DEBUG_INIT, "%s: control output URB unlinked", |
2029 | __func__); | |
cf7776dc HL |
2030 | usb_free_urb(ucs->urb_ctrl); |
2031 | ucs->urb_ctrl = NULL; | |
2032 | } | |
2033 | } | |
2034 | ||
2035 | /* gigaset_probe | |
2036 | * This function is called when a new USB device is connected. | |
2037 | * It checks whether the new device is handled by this driver. | |
2038 | */ | |
2039 | static int gigaset_probe(struct usb_interface *interface, | |
2040 | const struct usb_device_id *id) | |
2041 | { | |
2042 | struct usb_host_interface *hostif; | |
2043 | struct usb_device *udev = interface_to_usbdev(interface); | |
2044 | struct cardstate *cs = NULL; | |
2045 | struct bas_cardstate *ucs = NULL; | |
2046 | struct bas_bc_state *ubc; | |
2047 | struct usb_endpoint_descriptor *endpoint; | |
2048 | int i, j; | |
2049 | int ret; | |
2050 | ||
784d5858 TS |
2051 | gig_dbg(DEBUG_ANY, |
2052 | "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)", | |
2053 | __func__, le16_to_cpu(udev->descriptor.idVendor), | |
2054 | le16_to_cpu(udev->descriptor.idProduct)); | |
cf7776dc HL |
2055 | |
2056 | /* See if the device offered us matches what we can accept */ | |
2057 | if ((le16_to_cpu(udev->descriptor.idVendor) != USB_GIGA_VENDOR_ID) || | |
2058 | (le16_to_cpu(udev->descriptor.idProduct) != USB_GIGA_PRODUCT_ID && | |
2059 | le16_to_cpu(udev->descriptor.idProduct) != USB_4175_PRODUCT_ID && | |
2060 | le16_to_cpu(udev->descriptor.idProduct) != USB_SX303_PRODUCT_ID && | |
2061 | le16_to_cpu(udev->descriptor.idProduct) != USB_SX353_PRODUCT_ID)) { | |
784d5858 | 2062 | gig_dbg(DEBUG_ANY, "%s: unmatched ID - exiting", __func__); |
cf7776dc HL |
2063 | return -ENODEV; |
2064 | } | |
2065 | ||
2066 | /* set required alternate setting */ | |
2067 | hostif = interface->cur_altsetting; | |
2068 | if (hostif->desc.bAlternateSetting != 3) { | |
784d5858 TS |
2069 | gig_dbg(DEBUG_ANY, |
2070 | "%s: wrong alternate setting %d - trying to switch", | |
2071 | __func__, hostif->desc.bAlternateSetting); | |
cf7776dc | 2072 | if (usb_set_interface(udev, hostif->desc.bInterfaceNumber, 3) < 0) { |
784d5858 TS |
2073 | dev_warn(&udev->dev, "usb_set_interface failed, " |
2074 | "device %d interface %d altsetting %d\n", | |
2075 | udev->devnum, hostif->desc.bInterfaceNumber, | |
2076 | hostif->desc.bAlternateSetting); | |
cf7776dc HL |
2077 | return -ENODEV; |
2078 | } | |
2079 | hostif = interface->cur_altsetting; | |
2080 | } | |
2081 | ||
2082 | /* Reject application specific interfaces | |
2083 | */ | |
2084 | if (hostif->desc.bInterfaceClass != 255) { | |
784d5858 TS |
2085 | dev_warn(&udev->dev, "%s: bInterfaceClass == %d\n", |
2086 | __func__, hostif->desc.bInterfaceClass); | |
cf7776dc HL |
2087 | return -ENODEV; |
2088 | } | |
2089 | ||
784d5858 TS |
2090 | dev_info(&udev->dev, |
2091 | "%s: Device matched (Vendor: 0x%x, Product: 0x%x)\n", | |
2092 | __func__, le16_to_cpu(udev->descriptor.idVendor), | |
2093 | le16_to_cpu(udev->descriptor.idProduct)); | |
cf7776dc HL |
2094 | |
2095 | cs = gigaset_getunassignedcs(driver); | |
2096 | if (!cs) { | |
784d5858 | 2097 | dev_err(&udev->dev, "no free cardstate\n"); |
cf7776dc HL |
2098 | return -ENODEV; |
2099 | } | |
2100 | ucs = cs->hw.bas; | |
784d5858 TS |
2101 | |
2102 | /* save off device structure ptrs for later use */ | |
2103 | usb_get_dev(udev); | |
cf7776dc HL |
2104 | ucs->udev = udev; |
2105 | ucs->interface = interface; | |
b1d47464 | 2106 | cs->dev = &interface->dev; |
cf7776dc HL |
2107 | |
2108 | /* allocate URBs: | |
2109 | * - one for the interrupt pipe | |
2110 | * - three for the different uses of the default control pipe | |
2111 | * - three for each isochronous pipe | |
2112 | */ | |
2113 | ucs->urb_int_in = usb_alloc_urb(0, SLAB_KERNEL); | |
2114 | if (!ucs->urb_int_in) { | |
784d5858 | 2115 | dev_err(cs->dev, "no free urbs available\n"); |
cf7776dc HL |
2116 | goto error; |
2117 | } | |
2118 | ucs->urb_cmd_in = usb_alloc_urb(0, SLAB_KERNEL); | |
2119 | if (!ucs->urb_cmd_in) { | |
784d5858 | 2120 | dev_err(cs->dev, "no free urbs available\n"); |
cf7776dc HL |
2121 | goto error; |
2122 | } | |
2123 | ucs->urb_cmd_out = usb_alloc_urb(0, SLAB_KERNEL); | |
2124 | if (!ucs->urb_cmd_out) { | |
784d5858 | 2125 | dev_err(cs->dev, "no free urbs available\n"); |
cf7776dc HL |
2126 | goto error; |
2127 | } | |
2128 | ucs->urb_ctrl = usb_alloc_urb(0, SLAB_KERNEL); | |
2129 | if (!ucs->urb_ctrl) { | |
784d5858 | 2130 | dev_err(cs->dev, "no free urbs available\n"); |
cf7776dc HL |
2131 | goto error; |
2132 | } | |
2133 | ||
2134 | for (j = 0; j < 2; ++j) { | |
2135 | ubc = cs->bcs[j].hw.bas; | |
2136 | for (i = 0; i < BAS_OUTURBS; ++i) { | |
2137 | ubc->isoouturbs[i].urb = | |
2138 | usb_alloc_urb(BAS_NUMFRAMES, SLAB_KERNEL); | |
2139 | if (!ubc->isoouturbs[i].urb) { | |
784d5858 | 2140 | dev_err(cs->dev, "no free urbs available\n"); |
cf7776dc HL |
2141 | goto error; |
2142 | } | |
2143 | } | |
2144 | for (i = 0; i < BAS_INURBS; ++i) { | |
2145 | ubc->isoinurbs[i] = | |
2146 | usb_alloc_urb(BAS_NUMFRAMES, SLAB_KERNEL); | |
2147 | if (!ubc->isoinurbs[i]) { | |
784d5858 | 2148 | dev_err(cs->dev, "no free urbs available\n"); |
cf7776dc HL |
2149 | goto error; |
2150 | } | |
2151 | } | |
2152 | } | |
2153 | ||
2154 | ucs->rcvbuf = NULL; | |
2155 | ucs->rcvbuf_size = 0; | |
2156 | ||
2157 | /* Fill the interrupt urb and send it to the core */ | |
2158 | endpoint = &hostif->endpoint[0].desc; | |
2159 | usb_fill_int_urb(ucs->urb_int_in, udev, | |
784d5858 TS |
2160 | usb_rcvintpipe(udev, |
2161 | (endpoint->bEndpointAddress) & 0x0f), | |
2162 | ucs->int_in_buf, 3, read_int_callback, cs, | |
2163 | endpoint->bInterval); | |
cf7776dc HL |
2164 | ret = usb_submit_urb(ucs->urb_int_in, SLAB_KERNEL); |
2165 | if (ret) { | |
784d5858 TS |
2166 | dev_err(cs->dev, "could not submit interrupt URB: %s\n", |
2167 | get_usb_statmsg(ret)); | |
cf7776dc HL |
2168 | goto error; |
2169 | } | |
2170 | ||
2171 | /* tell the device that the driver is ready */ | |
2172 | if ((ret = req_submit(cs->bcs, HD_DEVICE_INIT_ACK, 0, 0)) != 0) | |
2173 | goto error; | |
2174 | ||
2175 | /* tell common part that the device is ready */ | |
2176 | if (startmode == SM_LOCKED) | |
2177 | atomic_set(&cs->mstate, MS_LOCKED); | |
cf7776dc HL |
2178 | |
2179 | /* save address of controller structure */ | |
2180 | usb_set_intfdata(interface, cs); | |
2181 | ||
b1d47464 TS |
2182 | if (!gigaset_start(cs)) |
2183 | goto error; | |
2184 | ||
cf7776dc HL |
2185 | return 0; |
2186 | ||
2187 | error: | |
2188 | freeurbs(cs); | |
2189 | gigaset_unassign(cs); | |
2190 | return -ENODEV; | |
2191 | } | |
2192 | ||
2193 | /* gigaset_disconnect | |
2194 | * This function is called when the Gigaset base is unplugged. | |
2195 | */ | |
2196 | static void gigaset_disconnect(struct usb_interface *interface) | |
2197 | { | |
2198 | struct cardstate *cs; | |
2199 | struct bas_cardstate *ucs; | |
2200 | ||
cf7776dc | 2201 | cs = usb_get_intfdata(interface); |
cf7776dc | 2202 | |
cf7776dc | 2203 | ucs = cs->hw.bas; |
cf7776dc | 2204 | |
b1d47464 | 2205 | dev_info(cs->dev, "disconnecting Gigaset base\n"); |
cf7776dc HL |
2206 | gigaset_stop(cs); |
2207 | freeurbs(cs); | |
b1d47464 | 2208 | usb_set_intfdata(interface, NULL); |
cf7776dc HL |
2209 | kfree(ucs->rcvbuf); |
2210 | ucs->rcvbuf = NULL; | |
2211 | ucs->rcvbuf_size = 0; | |
2212 | atomic_set(&ucs->basstate, 0); | |
b1d47464 TS |
2213 | usb_put_dev(ucs->udev); |
2214 | ucs->interface = NULL; | |
2215 | ucs->udev = NULL; | |
2216 | cs->dev = NULL; | |
cf7776dc HL |
2217 | gigaset_unassign(cs); |
2218 | } | |
2219 | ||
2220 | static struct gigaset_ops gigops = { | |
2221 | gigaset_write_cmd, | |
2222 | gigaset_write_room, | |
2223 | gigaset_chars_in_buffer, | |
2224 | gigaset_brkchars, | |
2225 | gigaset_init_bchannel, | |
2226 | gigaset_close_bchannel, | |
2227 | gigaset_initbcshw, | |
2228 | gigaset_freebcshw, | |
2229 | gigaset_reinitbcshw, | |
2230 | gigaset_initcshw, | |
2231 | gigaset_freecshw, | |
2232 | gigaset_set_modem_ctrl, | |
2233 | gigaset_baud_rate, | |
2234 | gigaset_set_line_ctrl, | |
2235 | gigaset_isoc_send_skb, | |
2236 | gigaset_isoc_input, | |
2237 | }; | |
2238 | ||
2239 | /* bas_gigaset_init | |
2240 | * This function is called after the kernel module is loaded. | |
2241 | */ | |
2242 | static int __init bas_gigaset_init(void) | |
2243 | { | |
2244 | int result; | |
2245 | ||
2246 | /* allocate memory for our driver state and intialize it */ | |
2247 | if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS, | |
784d5858 TS |
2248 | GIGASET_MODULENAME, GIGASET_DEVNAME, |
2249 | GIGASET_DEVFSNAME, &gigops, | |
2250 | THIS_MODULE)) == NULL) | |
cf7776dc HL |
2251 | goto error; |
2252 | ||
2253 | /* allocate memory for our device state and intialize it */ | |
917f5085 TS |
2254 | cardstate = gigaset_initcs(driver, 2, 0, 0, cidmode, |
2255 | GIGASET_MODULENAME); | |
cf7776dc HL |
2256 | if (!cardstate) |
2257 | goto error; | |
2258 | ||
2259 | /* register this driver with the USB subsystem */ | |
2260 | result = usb_register(&gigaset_usb_driver); | |
2261 | if (result < 0) { | |
2262 | err("usb_register failed (error %d)", -result); | |
2263 | goto error; | |
2264 | } | |
2265 | ||
2266 | info(DRIVER_AUTHOR); | |
2267 | info(DRIVER_DESC); | |
2268 | return 0; | |
2269 | ||
2270 | error: if (cardstate) | |
2271 | gigaset_freecs(cardstate); | |
2272 | cardstate = NULL; | |
2273 | if (driver) | |
2274 | gigaset_freedriver(driver); | |
2275 | driver = NULL; | |
2276 | return -1; | |
2277 | } | |
2278 | ||
2279 | /* bas_gigaset_exit | |
2280 | * This function is called before the kernel module is unloaded. | |
2281 | */ | |
2282 | static void __exit bas_gigaset_exit(void) | |
2283 | { | |
2284 | gigaset_blockdriver(driver); /* => probe will fail | |
784d5858 TS |
2285 | * => no gigaset_start any more |
2286 | */ | |
cf7776dc HL |
2287 | |
2288 | gigaset_shutdown(cardstate); | |
2289 | /* from now on, no isdn callback should be possible */ | |
2290 | ||
2291 | if (atomic_read(&cardstate->hw.bas->basstate) & BS_ATOPEN) { | |
784d5858 | 2292 | gig_dbg(DEBUG_ANY, "closing AT channel"); |
cf7776dc | 2293 | if (req_submit(cardstate->bcs, |
784d5858 TS |
2294 | HD_CLOSE_ATCHANNEL, 0, BAS_TIMEOUT) >= 0) { |
2295 | /* successfully submitted */ | |
2296 | //FIXME wait for completion? | |
cf7776dc HL |
2297 | } |
2298 | } | |
2299 | ||
2300 | /* deregister this driver with the USB subsystem */ | |
2301 | usb_deregister(&gigaset_usb_driver); | |
2302 | /* this will call the disconnect-callback */ | |
2303 | /* from now on, no disconnect/probe callback should be running */ | |
2304 | ||
2305 | gigaset_freecs(cardstate); | |
2306 | cardstate = NULL; | |
2307 | gigaset_freedriver(driver); | |
2308 | driver = NULL; | |
2309 | } | |
2310 | ||
2311 | ||
2312 | module_init(bas_gigaset_init); | |
2313 | module_exit(bas_gigaset_exit); | |
2314 | ||
2315 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
2316 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2317 | MODULE_LICENSE("GPL"); |