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>, | |
70440cf2 | 6 | * Stefan Eilers. |
cf7776dc | 7 | * |
cf7776dc HL |
8 | * ===================================================================== |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation; either version 2 of | |
12 | * the License, or (at your option) any later version. | |
13 | * ===================================================================== | |
cf7776dc HL |
14 | */ |
15 | ||
16 | #include "gigaset.h" | |
cf7776dc HL |
17 | #include <linux/usb.h> |
18 | #include <linux/module.h> | |
19 | #include <linux/moduleparam.h> | |
20 | ||
21 | /* Version Information */ | |
70440cf2 | 22 | #define DRIVER_AUTHOR "Tilman Schmidt <tilman@imap.cc>, Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers" |
cf7776dc HL |
23 | #define DRIVER_DESC "USB Driver for Gigaset 307x" |
24 | ||
25 | ||
26 | /* Module parameters */ | |
27 | ||
28 | static int startmode = SM_ISDN; | |
29 | static int cidmode = 1; | |
30 | ||
31 | module_param(startmode, int, S_IRUGO); | |
32 | module_param(cidmode, int, S_IRUGO); | |
33 | MODULE_PARM_DESC(startmode, "start in isdn4linux mode"); | |
34 | MODULE_PARM_DESC(cidmode, "Call-ID mode"); | |
35 | ||
36 | #define GIGASET_MINORS 1 | |
37 | #define GIGASET_MINOR 16 | |
38 | #define GIGASET_MODULENAME "bas_gigaset" | |
cf7776dc HL |
39 | #define GIGASET_DEVNAME "ttyGB" |
40 | ||
73a88814 TS |
41 | /* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */ |
42 | #define IF_WRITEBUF 264 | |
cf7776dc | 43 | |
170ebf85 TS |
44 | /* interrupt pipe message size according to ibid. ch. 2.2 */ |
45 | #define IP_MSGSIZE 3 | |
46 | ||
cf7776dc HL |
47 | /* Values for the Gigaset 307x */ |
48 | #define USB_GIGA_VENDOR_ID 0x0681 | |
73a88814 TS |
49 | #define USB_3070_PRODUCT_ID 0x0001 |
50 | #define USB_3075_PRODUCT_ID 0x0002 | |
cf7776dc HL |
51 | #define USB_SX303_PRODUCT_ID 0x0021 |
52 | #define USB_SX353_PRODUCT_ID 0x0022 | |
53 | ||
54 | /* table of devices that work with this driver */ | |
7891adf1 | 55 | static const struct usb_device_id gigaset_table[] = { |
73a88814 TS |
56 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3070_PRODUCT_ID) }, |
57 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3075_PRODUCT_ID) }, | |
cf7776dc HL |
58 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX303_PRODUCT_ID) }, |
59 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX353_PRODUCT_ID) }, | |
60 | { } /* Terminating entry */ | |
61 | }; | |
62 | ||
63 | MODULE_DEVICE_TABLE(usb, gigaset_table); | |
64 | ||
06163f86 | 65 | /*======================= local function prototypes ==========================*/ |
cf7776dc | 66 | |
06163f86 | 67 | /* function called if a new device belonging to this driver is connected */ |
cf7776dc HL |
68 | static int gigaset_probe(struct usb_interface *interface, |
69 | const struct usb_device_id *id); | |
70 | ||
71 | /* Function will be called if the device is unplugged */ | |
72 | static void gigaset_disconnect(struct usb_interface *interface); | |
73 | ||
024fd299 TS |
74 | /* functions called before/after suspend */ |
75 | static int gigaset_suspend(struct usb_interface *intf, pm_message_t message); | |
76 | static int gigaset_resume(struct usb_interface *intf); | |
77 | ||
78 | /* functions called before/after device reset */ | |
79 | static int gigaset_pre_reset(struct usb_interface *intf); | |
80 | static int gigaset_post_reset(struct usb_interface *intf); | |
81 | ||
06163f86 | 82 | static int atread_submit(struct cardstate *, int); |
73a88814 | 83 | static void stopurbs(struct bas_bc_state *); |
06163f86 | 84 | static int req_submit(struct bc_state *, int, int, int); |
73a88814 TS |
85 | static int atwrite_submit(struct cardstate *, unsigned char *, int); |
86 | static int start_cbsend(struct cardstate *); | |
cf7776dc | 87 | |
06163f86 | 88 | /*============================================================================*/ |
cf7776dc HL |
89 | |
90 | struct bas_cardstate { | |
784d5858 TS |
91 | struct usb_device *udev; /* USB device pointer */ |
92 | struct usb_interface *interface; /* interface for this device */ | |
cf7776dc HL |
93 | unsigned char minor; /* starting minor number */ |
94 | ||
784d5858 | 95 | struct urb *urb_ctrl; /* control pipe default URB */ |
cf7776dc HL |
96 | struct usb_ctrlrequest dr_ctrl; |
97 | struct timer_list timer_ctrl; /* control request timeout */ | |
06163f86 | 98 | int retry_ctrl; |
cf7776dc HL |
99 | |
100 | struct timer_list timer_atrdy; /* AT command ready timeout */ | |
784d5858 | 101 | struct urb *urb_cmd_out; /* for sending AT commands */ |
cf7776dc HL |
102 | struct usb_ctrlrequest dr_cmd_out; |
103 | int retry_cmd_out; | |
104 | ||
784d5858 | 105 | struct urb *urb_cmd_in; /* for receiving AT replies */ |
cf7776dc HL |
106 | struct usb_ctrlrequest dr_cmd_in; |
107 | struct timer_list timer_cmd_in; /* receive request timeout */ | |
784d5858 | 108 | unsigned char *rcvbuf; /* AT reply receive buffer */ |
cf7776dc | 109 | |
784d5858 | 110 | struct urb *urb_int_in; /* URB for interrupt pipe */ |
170ebf85 | 111 | unsigned char *int_in_buf; |
c9c0c304 TS |
112 | struct work_struct int_in_wq; /* for usb_clear_halt() */ |
113 | struct timer_list timer_int_in; /* int read retry delay */ | |
114 | int retry_int_in; | |
cf7776dc HL |
115 | |
116 | spinlock_t lock; /* locks all following */ | |
9d4bee2b | 117 | int basstate; /* bitmap (BS_*) */ |
cf7776dc | 118 | int pending; /* uncompleted base request */ |
024fd299 | 119 | wait_queue_head_t waitqueue; |
cf7776dc HL |
120 | int rcvbuf_size; /* size of AT receive buffer */ |
121 | /* 0: no receive in progress */ | |
122 | int retry_cmd_in; /* receive req retry count */ | |
123 | }; | |
124 | ||
125 | /* status of direct USB connection to 307x base (bits in basstate) */ | |
73a88814 TS |
126 | #define BS_ATOPEN 0x001 /* AT channel open */ |
127 | #define BS_B1OPEN 0x002 /* B channel 1 open */ | |
128 | #define BS_B2OPEN 0x004 /* B channel 2 open */ | |
129 | #define BS_ATREADY 0x008 /* base ready for AT command */ | |
130 | #define BS_INIT 0x010 /* base has signalled INIT_OK */ | |
131 | #define BS_ATTIMER 0x020 /* waiting for HD_READY_SEND_ATDATA */ | |
132 | #define BS_ATRDPEND 0x040 /* urb_cmd_in in use */ | |
133 | #define BS_ATWRPEND 0x080 /* urb_cmd_out in use */ | |
024fd299 | 134 | #define BS_SUSPEND 0x100 /* USB port suspended */ |
b5f581d5 | 135 | #define BS_RESETTING 0x200 /* waiting for HD_RESET_INTERRUPT_PIPE_ACK */ |
cf7776dc HL |
136 | |
137 | ||
7891adf1 | 138 | static struct gigaset_driver *driver; |
cf7776dc HL |
139 | |
140 | /* usb specific object needed to register this driver with the usb subsystem */ | |
141 | static struct usb_driver gigaset_usb_driver = { | |
142 | .name = GIGASET_MODULENAME, | |
143 | .probe = gigaset_probe, | |
144 | .disconnect = gigaset_disconnect, | |
145 | .id_table = gigaset_table, | |
024fd299 TS |
146 | .suspend = gigaset_suspend, |
147 | .resume = gigaset_resume, | |
148 | .reset_resume = gigaset_post_reset, | |
149 | .pre_reset = gigaset_pre_reset, | |
150 | .post_reset = gigaset_post_reset, | |
e1f12eb6 | 151 | .disable_hub_initiated_lpm = 1, |
cf7776dc HL |
152 | }; |
153 | ||
73a88814 TS |
154 | /* get message text for usb_submit_urb return code |
155 | */ | |
156 | static char *get_usb_rcmsg(int rc) | |
157 | { | |
158 | static char unkmsg[28]; | |
159 | ||
160 | switch (rc) { | |
161 | case 0: | |
162 | return "success"; | |
163 | case -ENOMEM: | |
164 | return "out of memory"; | |
165 | case -ENODEV: | |
166 | return "device not present"; | |
167 | case -ENOENT: | |
168 | return "endpoint not present"; | |
169 | case -ENXIO: | |
170 | return "URB type not supported"; | |
171 | case -EINVAL: | |
172 | return "invalid argument"; | |
173 | case -EAGAIN: | |
174 | return "start frame too early or too much scheduled"; | |
175 | case -EFBIG: | |
bb7196d2 | 176 | return "too many isoc frames requested"; |
73a88814 TS |
177 | case -EPIPE: |
178 | return "endpoint stalled"; | |
179 | case -EMSGSIZE: | |
180 | return "invalid packet size"; | |
181 | case -ENOSPC: | |
182 | return "would overcommit USB bandwidth"; | |
183 | case -ESHUTDOWN: | |
184 | return "device shut down"; | |
185 | case -EPERM: | |
186 | return "reject flag set"; | |
187 | case -EHOSTUNREACH: | |
188 | return "device suspended"; | |
189 | default: | |
190 | snprintf(unkmsg, sizeof(unkmsg), "unknown error %d", rc); | |
191 | return unkmsg; | |
192 | } | |
193 | } | |
194 | ||
cf7776dc HL |
195 | /* get message text for USB status code |
196 | */ | |
197 | static char *get_usb_statmsg(int status) | |
198 | { | |
199 | static char unkmsg[28]; | |
200 | ||
201 | switch (status) { | |
202 | case 0: | |
203 | return "success"; | |
204 | case -ENOENT: | |
73a88814 | 205 | return "unlinked (sync)"; |
cf7776dc | 206 | case -EINPROGRESS: |
bb7196d2 | 207 | return "URB still pending"; |
cf7776dc | 208 | case -EPROTO: |
bb7196d2 | 209 | return "bitstuff error, timeout, or unknown USB error"; |
cf7776dc | 210 | case -EILSEQ: |
73a88814 | 211 | return "CRC mismatch, timeout, or unknown USB error"; |
38e2bfc9 | 212 | case -ETIME: |
bb7196d2 | 213 | return "USB response timeout"; |
73a88814 TS |
214 | case -EPIPE: |
215 | return "endpoint stalled"; | |
216 | case -ECOMM: | |
217 | return "IN buffer overrun"; | |
218 | case -ENOSR: | |
219 | return "OUT buffer underrun"; | |
220 | case -EOVERFLOW: | |
bb7196d2 | 221 | return "endpoint babble"; |
cf7776dc | 222 | case -EREMOTEIO: |
bb7196d2 | 223 | return "short packet"; |
73a88814 TS |
224 | case -ENODEV: |
225 | return "device removed"; | |
cf7776dc | 226 | case -EXDEV: |
bb7196d2 | 227 | return "partial isoc transfer"; |
cf7776dc | 228 | case -EINVAL: |
bb7196d2 | 229 | return "ISO madness"; |
73a88814 TS |
230 | case -ECONNRESET: |
231 | return "unlinked (async)"; | |
cf7776dc | 232 | case -ESHUTDOWN: |
73a88814 | 233 | return "device shut down"; |
cf7776dc | 234 | default: |
73a88814 | 235 | snprintf(unkmsg, sizeof(unkmsg), "unknown status %d", status); |
cf7776dc HL |
236 | return unkmsg; |
237 | } | |
238 | } | |
239 | ||
240 | /* usb_pipetype_str | |
241 | * retrieve string representation of USB pipe type | |
242 | */ | |
243 | static inline char *usb_pipetype_str(int pipe) | |
244 | { | |
245 | if (usb_pipeisoc(pipe)) | |
246 | return "Isoc"; | |
247 | if (usb_pipeint(pipe)) | |
248 | return "Int"; | |
249 | if (usb_pipecontrol(pipe)) | |
250 | return "Ctrl"; | |
251 | if (usb_pipebulk(pipe)) | |
252 | return "Bulk"; | |
253 | return "?"; | |
254 | } | |
255 | ||
256 | /* dump_urb | |
257 | * write content of URB to syslog for debugging | |
258 | */ | |
259 | static inline void dump_urb(enum debuglevel level, const char *tag, | |
784d5858 | 260 | struct urb *urb) |
cf7776dc HL |
261 | { |
262 | #ifdef CONFIG_GIGASET_DEBUG | |
263 | int i; | |
784d5858 | 264 | gig_dbg(level, "%s urb(0x%08lx)->{", tag, (unsigned long) urb); |
cf7776dc | 265 | if (urb) { |
784d5858 TS |
266 | gig_dbg(level, |
267 | " dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, " | |
dbd98231 | 268 | "hcpriv=0x%08lx, transfer_flags=0x%x,", |
784d5858 TS |
269 | (unsigned long) urb->dev, |
270 | usb_pipetype_str(urb->pipe), | |
271 | usb_pipeendpoint(urb->pipe), usb_pipedevice(urb->pipe), | |
272 | usb_pipein(urb->pipe) ? "in" : "out", | |
dbd98231 | 273 | (unsigned long) urb->hcpriv, |
784d5858 TS |
274 | urb->transfer_flags); |
275 | gig_dbg(level, | |
276 | " transfer_buffer=0x%08lx[%d], actual_length=%d, " | |
249b061a | 277 | "setup_packet=0x%08lx,", |
784d5858 TS |
278 | (unsigned long) urb->transfer_buffer, |
279 | urb->transfer_buffer_length, urb->actual_length, | |
249b061a | 280 | (unsigned long) urb->setup_packet); |
784d5858 TS |
281 | gig_dbg(level, |
282 | " start_frame=%d, number_of_packets=%d, interval=%d, " | |
283 | "error_count=%d,", | |
284 | urb->start_frame, urb->number_of_packets, urb->interval, | |
285 | urb->error_count); | |
286 | gig_dbg(level, | |
287 | " context=0x%08lx, complete=0x%08lx, " | |
288 | "iso_frame_desc[]={", | |
289 | (unsigned long) urb->context, | |
290 | (unsigned long) urb->complete); | |
cf7776dc | 291 | for (i = 0; i < urb->number_of_packets; i++) { |
917f5085 TS |
292 | struct usb_iso_packet_descriptor *pifd |
293 | = &urb->iso_frame_desc[i]; | |
784d5858 TS |
294 | gig_dbg(level, |
295 | " {offset=%u, length=%u, actual_length=%u, " | |
296 | "status=%u}", | |
297 | pifd->offset, pifd->length, pifd->actual_length, | |
298 | pifd->status); | |
cf7776dc HL |
299 | } |
300 | } | |
784d5858 | 301 | gig_dbg(level, "}}"); |
cf7776dc HL |
302 | #endif |
303 | } | |
304 | ||
305 | /* read/set modem control bits etc. (m10x only) */ | |
306 | static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state, | |
784d5858 | 307 | unsigned new_state) |
cf7776dc HL |
308 | { |
309 | return -EINVAL; | |
310 | } | |
311 | ||
312 | static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag) | |
313 | { | |
314 | return -EINVAL; | |
315 | } | |
316 | ||
317 | static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag) | |
318 | { | |
319 | return -EINVAL; | |
320 | } | |
321 | ||
b5f581d5 TS |
322 | /* set/clear bits in base connection state, return previous state |
323 | */ | |
324 | static inline int update_basstate(struct bas_cardstate *ucs, | |
325 | int set, int clear) | |
326 | { | |
327 | unsigned long flags; | |
328 | int state; | |
329 | ||
330 | spin_lock_irqsave(&ucs->lock, flags); | |
331 | state = ucs->basstate; | |
332 | ucs->basstate = (state & ~clear) | set; | |
333 | spin_unlock_irqrestore(&ucs->lock, flags); | |
334 | return state; | |
335 | } | |
336 | ||
cf7776dc HL |
337 | /* error_hangup |
338 | * hang up any existing connection because of an unrecoverable error | |
339 | * This function may be called from any context and takes care of scheduling | |
340 | * the necessary actions for execution outside of interrupt context. | |
06163f86 | 341 | * cs->lock must not be held. |
cf7776dc HL |
342 | * argument: |
343 | * B channel control structure | |
344 | */ | |
345 | static inline void error_hangup(struct bc_state *bcs) | |
346 | { | |
347 | struct cardstate *cs = bcs->cs; | |
348 | ||
1528b18f | 349 | gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL); |
cf7776dc HL |
350 | gigaset_schedule_event(cs); |
351 | } | |
352 | ||
353 | /* error_reset | |
354 | * reset Gigaset device because of an unrecoverable error | |
06163f86 | 355 | * This function may be called from any context, and takes care of |
73a88814 | 356 | * scheduling the necessary actions for execution outside of interrupt context. |
60798c68 | 357 | * cs->hw.bas->lock must not be held. |
cf7776dc HL |
358 | * argument: |
359 | * controller state structure | |
360 | */ | |
361 | static inline void error_reset(struct cardstate *cs) | |
362 | { | |
b5f581d5 TS |
363 | /* reset interrupt pipe to recover (ignore errors) */ |
364 | update_basstate(cs->hw.bas, BS_RESETTING, 0); | |
60798c68 TS |
365 | if (req_submit(cs->bcs, HD_RESET_INTERRUPT_PIPE, 0, BAS_TIMEOUT)) |
366 | /* submission failed, escalate to USB port reset */ | |
367 | usb_queue_reset_device(cs->hw.bas->interface); | |
cf7776dc HL |
368 | } |
369 | ||
370 | /* check_pending | |
371 | * check for completion of pending control request | |
372 | * parameter: | |
784d5858 | 373 | * ucs hardware specific controller state structure |
cf7776dc HL |
374 | */ |
375 | static void check_pending(struct bas_cardstate *ucs) | |
376 | { | |
377 | unsigned long flags; | |
378 | ||
cf7776dc HL |
379 | spin_lock_irqsave(&ucs->lock, flags); |
380 | switch (ucs->pending) { | |
381 | case 0: | |
382 | break; | |
383 | case HD_OPEN_ATCHANNEL: | |
9d4bee2b | 384 | if (ucs->basstate & BS_ATOPEN) |
cf7776dc HL |
385 | ucs->pending = 0; |
386 | break; | |
387 | case HD_OPEN_B1CHANNEL: | |
9d4bee2b | 388 | if (ucs->basstate & BS_B1OPEN) |
cf7776dc HL |
389 | ucs->pending = 0; |
390 | break; | |
391 | case HD_OPEN_B2CHANNEL: | |
9d4bee2b | 392 | if (ucs->basstate & BS_B2OPEN) |
cf7776dc HL |
393 | ucs->pending = 0; |
394 | break; | |
395 | case HD_CLOSE_ATCHANNEL: | |
9d4bee2b | 396 | if (!(ucs->basstate & BS_ATOPEN)) |
cf7776dc | 397 | ucs->pending = 0; |
cf7776dc HL |
398 | break; |
399 | case HD_CLOSE_B1CHANNEL: | |
9d4bee2b | 400 | if (!(ucs->basstate & BS_B1OPEN)) |
cf7776dc HL |
401 | ucs->pending = 0; |
402 | break; | |
403 | case HD_CLOSE_B2CHANNEL: | |
9d4bee2b | 404 | if (!(ucs->basstate & BS_B2OPEN)) |
cf7776dc HL |
405 | ucs->pending = 0; |
406 | break; | |
407 | case HD_DEVICE_INIT_ACK: /* no reply expected */ | |
408 | ucs->pending = 0; | |
409 | break; | |
b5f581d5 TS |
410 | case HD_RESET_INTERRUPT_PIPE: |
411 | if (!(ucs->basstate & BS_RESETTING)) | |
412 | ucs->pending = 0; | |
413 | break; | |
f86936ff TS |
414 | /* |
415 | * HD_READ_ATMESSAGE and HD_WRITE_ATMESSAGE are handled separately | |
416 | * and should never end up here | |
417 | */ | |
cf7776dc | 418 | default: |
784d5858 TS |
419 | dev_warn(&ucs->interface->dev, |
420 | "unknown pending request 0x%02x cleared\n", | |
421 | ucs->pending); | |
cf7776dc HL |
422 | ucs->pending = 0; |
423 | } | |
424 | ||
425 | if (!ucs->pending) | |
426 | del_timer(&ucs->timer_ctrl); | |
427 | ||
428 | spin_unlock_irqrestore(&ucs->lock, flags); | |
429 | } | |
430 | ||
431 | /* cmd_in_timeout | |
432 | * timeout routine for command input request | |
433 | * argument: | |
434 | * controller state structure | |
435 | */ | |
436 | static void cmd_in_timeout(unsigned long data) | |
437 | { | |
438 | struct cardstate *cs = (struct cardstate *) data; | |
d48c7784 | 439 | struct bas_cardstate *ucs = cs->hw.bas; |
06163f86 | 440 | int rc; |
cf7776dc | 441 | |
cf7776dc | 442 | if (!ucs->rcvbuf_size) { |
784d5858 | 443 | gig_dbg(DEBUG_USBREQ, "%s: no receive in progress", __func__); |
cf7776dc HL |
444 | return; |
445 | } | |
cf7776dc | 446 | |
c8701a08 | 447 | if (ucs->retry_cmd_in++ >= BAS_RETRY) { |
06163f86 TS |
448 | dev_err(cs->dev, |
449 | "control read: timeout, giving up after %d tries\n", | |
450 | ucs->retry_cmd_in); | |
c8701a08 TS |
451 | kfree(ucs->rcvbuf); |
452 | ucs->rcvbuf = NULL; | |
453 | ucs->rcvbuf_size = 0; | |
454 | error_reset(cs); | |
455 | return; | |
456 | } | |
457 | ||
458 | gig_dbg(DEBUG_USBREQ, "%s: timeout, retry %d", | |
459 | __func__, ucs->retry_cmd_in); | |
460 | rc = atread_submit(cs, BAS_TIMEOUT); | |
461 | if (rc < 0) { | |
462 | kfree(ucs->rcvbuf); | |
463 | ucs->rcvbuf = NULL; | |
464 | ucs->rcvbuf_size = 0; | |
465 | if (rc != -ENODEV) | |
466 | error_reset(cs); | |
06163f86 | 467 | } |
cf7776dc HL |
468 | } |
469 | ||
06163f86 TS |
470 | /* read_ctrl_callback |
471 | * USB completion handler for control pipe input | |
472 | * called by the USB subsystem in interrupt context | |
473 | * parameter: | |
474 | * urb USB request block | |
475 | * urb->context = inbuf structure for controller state | |
476 | */ | |
7d12e780 | 477 | static void read_ctrl_callback(struct urb *urb) |
06163f86 TS |
478 | { |
479 | struct inbuf_t *inbuf = urb->context; | |
480 | struct cardstate *cs = inbuf->cs; | |
481 | struct bas_cardstate *ucs = cs->hw.bas; | |
dbd98231 | 482 | int status = urb->status; |
06163f86 TS |
483 | unsigned numbytes; |
484 | int rc; | |
485 | ||
486 | update_basstate(ucs, 0, BS_ATRDPEND); | |
024fd299 | 487 | wake_up(&ucs->waitqueue); |
06163f86 TS |
488 | del_timer(&ucs->timer_cmd_in); |
489 | ||
dbd98231 | 490 | switch (status) { |
06163f86 TS |
491 | case 0: /* normal completion */ |
492 | numbytes = urb->actual_length; | |
493 | if (unlikely(numbytes != ucs->rcvbuf_size)) { | |
494 | dev_warn(cs->dev, | |
475be4d8 | 495 | "control read: received %d chars, expected %d\n", |
06163f86 TS |
496 | numbytes, ucs->rcvbuf_size); |
497 | if (numbytes > ucs->rcvbuf_size) | |
498 | numbytes = ucs->rcvbuf_size; | |
499 | } | |
500 | ||
c8701a08 TS |
501 | /* copy received bytes to inbuf, notify event layer */ |
502 | if (gigaset_fill_inbuf(inbuf, ucs->rcvbuf, numbytes)) { | |
503 | gig_dbg(DEBUG_INTR, "%s-->BH", __func__); | |
504 | gigaset_schedule_event(cs); | |
06163f86 TS |
505 | } |
506 | break; | |
507 | ||
508 | case -ENOENT: /* cancelled */ | |
509 | case -ECONNRESET: /* cancelled (async) */ | |
510 | case -EINPROGRESS: /* pending */ | |
511 | case -ENODEV: /* device removed */ | |
512 | case -ESHUTDOWN: /* device shut down */ | |
c8701a08 | 513 | /* no further action necessary */ |
06163f86 | 514 | gig_dbg(DEBUG_USBREQ, "%s: %s", |
dbd98231 | 515 | __func__, get_usb_statmsg(status)); |
06163f86 TS |
516 | break; |
517 | ||
c8701a08 | 518 | default: /* other errors: retry */ |
06163f86 | 519 | if (ucs->retry_cmd_in++ < BAS_RETRY) { |
c8701a08 TS |
520 | gig_dbg(DEBUG_USBREQ, "%s: %s, retry %d", __func__, |
521 | get_usb_statmsg(status), ucs->retry_cmd_in); | |
06163f86 | 522 | rc = atread_submit(cs, BAS_TIMEOUT); |
c8701a08 TS |
523 | if (rc >= 0) |
524 | /* successfully resubmitted, skip freeing */ | |
06163f86 | 525 | return; |
c8701a08 TS |
526 | if (rc == -ENODEV) |
527 | /* disconnect, no further action necessary */ | |
528 | break; | |
06163f86 | 529 | } |
c8701a08 TS |
530 | dev_err(cs->dev, "control read: %s, giving up after %d tries\n", |
531 | get_usb_statmsg(status), ucs->retry_cmd_in); | |
06163f86 TS |
532 | error_reset(cs); |
533 | } | |
534 | ||
c8701a08 | 535 | /* read finished, free buffer */ |
06163f86 TS |
536 | kfree(ucs->rcvbuf); |
537 | ucs->rcvbuf = NULL; | |
538 | ucs->rcvbuf_size = 0; | |
06163f86 TS |
539 | } |
540 | ||
cf7776dc | 541 | /* atread_submit |
73a88814 | 542 | * submit an HD_READ_ATMESSAGE command URB and optionally start a timeout |
cf7776dc HL |
543 | * parameters: |
544 | * cs controller state structure | |
545 | * timeout timeout in 1/10 sec., 0: none | |
546 | * return value: | |
547 | * 0 on success | |
cf7776dc HL |
548 | * -EBUSY if another request is pending |
549 | * any URB submission error code | |
550 | */ | |
551 | static int atread_submit(struct cardstate *cs, int timeout) | |
552 | { | |
d48c7784 | 553 | struct bas_cardstate *ucs = cs->hw.bas; |
024fd299 | 554 | int basstate; |
cf7776dc HL |
555 | int ret; |
556 | ||
784d5858 TS |
557 | gig_dbg(DEBUG_USBREQ, "-------> HD_READ_ATMESSAGE (%d)", |
558 | ucs->rcvbuf_size); | |
cf7776dc | 559 | |
024fd299 TS |
560 | basstate = update_basstate(ucs, BS_ATRDPEND, 0); |
561 | if (basstate & BS_ATRDPEND) { | |
784d5858 TS |
562 | dev_err(cs->dev, |
563 | "could not submit HD_READ_ATMESSAGE: URB busy\n"); | |
cf7776dc HL |
564 | return -EBUSY; |
565 | } | |
566 | ||
024fd299 TS |
567 | if (basstate & BS_SUSPEND) { |
568 | dev_notice(cs->dev, | |
569 | "HD_READ_ATMESSAGE not submitted, " | |
570 | "suspend in progress\n"); | |
571 | update_basstate(ucs, 0, BS_ATRDPEND); | |
572 | /* treat like disconnect */ | |
573 | return -ENODEV; | |
574 | } | |
575 | ||
cf7776dc HL |
576 | ucs->dr_cmd_in.bRequestType = IN_VENDOR_REQ; |
577 | ucs->dr_cmd_in.bRequest = HD_READ_ATMESSAGE; | |
578 | ucs->dr_cmd_in.wValue = 0; | |
579 | ucs->dr_cmd_in.wIndex = 0; | |
580 | ucs->dr_cmd_in.wLength = cpu_to_le16(ucs->rcvbuf_size); | |
581 | usb_fill_control_urb(ucs->urb_cmd_in, ucs->udev, | |
784d5858 | 582 | usb_rcvctrlpipe(ucs->udev, 0), |
7891adf1 | 583 | (unsigned char *) &ucs->dr_cmd_in, |
784d5858 TS |
584 | ucs->rcvbuf, ucs->rcvbuf_size, |
585 | read_ctrl_callback, cs->inbuf); | |
cf7776dc | 586 | |
7891adf1 TS |
587 | ret = usb_submit_urb(ucs->urb_cmd_in, GFP_ATOMIC); |
588 | if (ret != 0) { | |
73a88814 | 589 | update_basstate(ucs, 0, BS_ATRDPEND); |
784d5858 | 590 | dev_err(cs->dev, "could not submit HD_READ_ATMESSAGE: %s\n", |
06163f86 | 591 | get_usb_rcmsg(ret)); |
cf7776dc HL |
592 | return ret; |
593 | } | |
594 | ||
595 | if (timeout > 0) { | |
784d5858 | 596 | gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout); |
1d5a9edc | 597 | mod_timer(&ucs->timer_cmd_in, jiffies + timeout * HZ / 10); |
cf7776dc HL |
598 | } |
599 | return 0; | |
600 | } | |
601 | ||
c9c0c304 TS |
602 | /* int_in_work |
603 | * workqueue routine to clear halt on interrupt in endpoint | |
604 | */ | |
605 | ||
606 | static void int_in_work(struct work_struct *work) | |
607 | { | |
608 | struct bas_cardstate *ucs = | |
609 | container_of(work, struct bas_cardstate, int_in_wq); | |
610 | struct urb *urb = ucs->urb_int_in; | |
611 | struct cardstate *cs = urb->context; | |
612 | int rc; | |
613 | ||
614 | /* clear halt condition */ | |
615 | rc = usb_clear_halt(ucs->udev, urb->pipe); | |
616 | gig_dbg(DEBUG_USBREQ, "clear_halt: %s", get_usb_rcmsg(rc)); | |
617 | if (rc == 0) | |
618 | /* success, resubmit interrupt read URB */ | |
619 | rc = usb_submit_urb(urb, GFP_ATOMIC); | |
c6fdd8e5 TS |
620 | |
621 | switch (rc) { | |
622 | case 0: /* success */ | |
623 | case -ENODEV: /* device gone */ | |
624 | case -EINVAL: /* URB already resubmitted, or terminal badness */ | |
625 | break; | |
626 | default: /* failure: try to recover by resetting the device */ | |
c9c0c304 TS |
627 | dev_err(cs->dev, "clear halt failed: %s\n", get_usb_rcmsg(rc)); |
628 | rc = usb_lock_device_for_reset(ucs->udev, ucs->interface); | |
629 | if (rc == 0) { | |
630 | rc = usb_reset_device(ucs->udev); | |
631 | usb_unlock_device(ucs->udev); | |
632 | } | |
633 | } | |
634 | ucs->retry_int_in = 0; | |
635 | } | |
636 | ||
637 | /* int_in_resubmit | |
638 | * timer routine for interrupt read delayed resubmit | |
639 | * argument: | |
640 | * controller state structure | |
641 | */ | |
642 | static void int_in_resubmit(unsigned long data) | |
643 | { | |
644 | struct cardstate *cs = (struct cardstate *) data; | |
645 | struct bas_cardstate *ucs = cs->hw.bas; | |
646 | int rc; | |
647 | ||
648 | if (ucs->retry_int_in++ >= BAS_RETRY) { | |
649 | dev_err(cs->dev, "interrupt read: giving up after %d tries\n", | |
650 | ucs->retry_int_in); | |
651 | usb_queue_reset_device(ucs->interface); | |
652 | return; | |
653 | } | |
654 | ||
655 | gig_dbg(DEBUG_USBREQ, "%s: retry %d", __func__, ucs->retry_int_in); | |
656 | rc = usb_submit_urb(ucs->urb_int_in, GFP_ATOMIC); | |
657 | if (rc != 0 && rc != -ENODEV) { | |
658 | dev_err(cs->dev, "could not resubmit interrupt URB: %s\n", | |
659 | get_usb_rcmsg(rc)); | |
660 | usb_queue_reset_device(ucs->interface); | |
661 | } | |
662 | } | |
663 | ||
cf7776dc HL |
664 | /* read_int_callback |
665 | * USB completion handler for interrupt pipe input | |
666 | * called by the USB subsystem in interrupt context | |
667 | * parameter: | |
668 | * urb USB request block | |
669 | * urb->context = controller state structure | |
670 | */ | |
7d12e780 | 671 | static void read_int_callback(struct urb *urb) |
cf7776dc | 672 | { |
d48c7784 TS |
673 | struct cardstate *cs = urb->context; |
674 | struct bas_cardstate *ucs = cs->hw.bas; | |
cf7776dc | 675 | struct bc_state *bcs; |
dbd98231 | 676 | int status = urb->status; |
cf7776dc | 677 | unsigned long flags; |
73a88814 | 678 | int rc; |
cf7776dc HL |
679 | unsigned l; |
680 | int channel; | |
681 | ||
dbd98231 | 682 | switch (status) { |
cf7776dc | 683 | case 0: /* success */ |
c9c0c304 | 684 | ucs->retry_int_in = 0; |
cf7776dc | 685 | break; |
c9c0c304 TS |
686 | case -EPIPE: /* endpoint stalled */ |
687 | schedule_work(&ucs->int_in_wq); | |
688 | /* fall through */ | |
73a88814 TS |
689 | case -ENOENT: /* cancelled */ |
690 | case -ECONNRESET: /* cancelled (async) */ | |
cf7776dc | 691 | case -EINPROGRESS: /* pending */ |
c9c0c304 TS |
692 | case -ENODEV: /* device removed */ |
693 | case -ESHUTDOWN: /* device shut down */ | |
694 | /* no further action necessary */ | |
784d5858 | 695 | gig_dbg(DEBUG_USBREQ, "%s: %s", |
dbd98231 | 696 | __func__, get_usb_statmsg(status)); |
cf7776dc | 697 | return; |
c9c0c304 TS |
698 | case -EPROTO: /* protocol error or unplug */ |
699 | case -EILSEQ: | |
700 | case -ETIME: | |
701 | /* resubmit after delay */ | |
702 | gig_dbg(DEBUG_USBREQ, "%s: %s", | |
703 | __func__, get_usb_statmsg(status)); | |
704 | mod_timer(&ucs->timer_int_in, jiffies + HZ / 10); | |
73a88814 | 705 | return; |
c9c0c304 | 706 | default: /* other errors: just resubmit */ |
784d5858 | 707 | dev_warn(cs->dev, "interrupt read: %s\n", |
dbd98231 | 708 | get_usb_statmsg(status)); |
cf7776dc HL |
709 | goto resubmit; |
710 | } | |
711 | ||
73a88814 | 712 | /* drop incomplete packets even if the missing bytes wouldn't matter */ |
170ebf85 | 713 | if (unlikely(urb->actual_length < IP_MSGSIZE)) { |
73a88814 TS |
714 | dev_warn(cs->dev, "incomplete interrupt packet (%d bytes)\n", |
715 | urb->actual_length); | |
716 | goto resubmit; | |
717 | } | |
718 | ||
cf7776dc | 719 | l = (unsigned) ucs->int_in_buf[1] + |
475be4d8 | 720 | (((unsigned) ucs->int_in_buf[2]) << 8); |
cf7776dc | 721 | |
784d5858 TS |
722 | gig_dbg(DEBUG_USBREQ, "<-------%d: 0x%02x (%u [0x%02x 0x%02x])", |
723 | urb->actual_length, (int)ucs->int_in_buf[0], l, | |
724 | (int)ucs->int_in_buf[1], (int)ucs->int_in_buf[2]); | |
cf7776dc HL |
725 | |
726 | channel = 0; | |
727 | ||
728 | switch (ucs->int_in_buf[0]) { | |
729 | case HD_DEVICE_INIT_OK: | |
730 | update_basstate(ucs, BS_INIT, 0); | |
731 | break; | |
732 | ||
733 | case HD_READY_SEND_ATDATA: | |
734 | del_timer(&ucs->timer_atrdy); | |
735 | update_basstate(ucs, BS_ATREADY, BS_ATTIMER); | |
736 | start_cbsend(cs); | |
737 | break; | |
738 | ||
739 | case HD_OPEN_B2CHANNEL_ACK: | |
740 | ++channel; | |
741 | case HD_OPEN_B1CHANNEL_ACK: | |
742 | bcs = cs->bcs + channel; | |
743 | update_basstate(ucs, BS_B1OPEN << channel, 0); | |
744 | gigaset_bchannel_up(bcs); | |
745 | break; | |
746 | ||
747 | case HD_OPEN_ATCHANNEL_ACK: | |
748 | update_basstate(ucs, BS_ATOPEN, 0); | |
749 | start_cbsend(cs); | |
750 | break; | |
751 | ||
752 | case HD_CLOSE_B2CHANNEL_ACK: | |
753 | ++channel; | |
754 | case HD_CLOSE_B1CHANNEL_ACK: | |
755 | bcs = cs->bcs + channel; | |
756 | update_basstate(ucs, 0, BS_B1OPEN << channel); | |
757 | stopurbs(bcs->hw.bas); | |
758 | gigaset_bchannel_down(bcs); | |
759 | break; | |
760 | ||
761 | case HD_CLOSE_ATCHANNEL_ACK: | |
762 | update_basstate(ucs, 0, BS_ATOPEN); | |
763 | break; | |
764 | ||
765 | case HD_B2_FLOW_CONTROL: | |
766 | ++channel; | |
767 | case HD_B1_FLOW_CONTROL: | |
768 | bcs = cs->bcs + channel; | |
769 | atomic_add((l - BAS_NORMFRAME) * BAS_CORRFRAMES, | |
784d5858 TS |
770 | &bcs->hw.bas->corrbytes); |
771 | gig_dbg(DEBUG_ISO, | |
772 | "Flow control (channel %d, sub %d): 0x%02x => %d", | |
773 | channel, bcs->hw.bas->numsub, l, | |
774 | atomic_read(&bcs->hw.bas->corrbytes)); | |
cf7776dc HL |
775 | break; |
776 | ||
777 | case HD_RECEIVEATDATA_ACK: /* AT response ready to be received */ | |
778 | if (!l) { | |
784d5858 | 779 | dev_warn(cs->dev, |
475be4d8 | 780 | "HD_RECEIVEATDATA_ACK with length 0 ignored\n"); |
cf7776dc HL |
781 | break; |
782 | } | |
783 | spin_lock_irqsave(&cs->lock, flags); | |
c9c0c304 TS |
784 | if (ucs->basstate & BS_ATRDPEND) { |
785 | spin_unlock_irqrestore(&cs->lock, flags); | |
786 | dev_warn(cs->dev, | |
475be4d8 | 787 | "HD_RECEIVEATDATA_ACK(%d) during HD_READ_ATMESSAGE(%d) ignored\n", |
c9c0c304 TS |
788 | l, ucs->rcvbuf_size); |
789 | break; | |
790 | } | |
cf7776dc | 791 | if (ucs->rcvbuf_size) { |
73a88814 | 792 | /* throw away previous buffer - we have no queue */ |
784d5858 | 793 | dev_err(cs->dev, |
73a88814 TS |
794 | "receive AT data overrun, %d bytes lost\n", |
795 | ucs->rcvbuf_size); | |
796 | kfree(ucs->rcvbuf); | |
797 | ucs->rcvbuf_size = 0; | |
cf7776dc | 798 | } |
7891adf1 TS |
799 | ucs->rcvbuf = kmalloc(l, GFP_ATOMIC); |
800 | if (ucs->rcvbuf == NULL) { | |
cf7776dc | 801 | spin_unlock_irqrestore(&cs->lock, flags); |
73a88814 | 802 | dev_err(cs->dev, "out of memory receiving AT data\n"); |
cf7776dc HL |
803 | break; |
804 | } | |
805 | ucs->rcvbuf_size = l; | |
806 | ucs->retry_cmd_in = 0; | |
7891adf1 TS |
807 | rc = atread_submit(cs, BAS_TIMEOUT); |
808 | if (rc < 0) { | |
cf7776dc HL |
809 | kfree(ucs->rcvbuf); |
810 | ucs->rcvbuf = NULL; | |
811 | ucs->rcvbuf_size = 0; | |
cf7776dc HL |
812 | } |
813 | spin_unlock_irqrestore(&cs->lock, flags); | |
c9c0c304 TS |
814 | if (rc < 0 && rc != -ENODEV) |
815 | error_reset(cs); | |
cf7776dc HL |
816 | break; |
817 | ||
818 | case HD_RESET_INTERRUPT_PIPE_ACK: | |
b5f581d5 TS |
819 | update_basstate(ucs, 0, BS_RESETTING); |
820 | dev_notice(cs->dev, "interrupt pipe reset\n"); | |
cf7776dc HL |
821 | break; |
822 | ||
823 | case HD_SUSPEND_END: | |
784d5858 | 824 | gig_dbg(DEBUG_USBREQ, "HD_SUSPEND_END"); |
cf7776dc HL |
825 | break; |
826 | ||
827 | default: | |
784d5858 TS |
828 | dev_warn(cs->dev, |
829 | "unknown Gigaset signal 0x%02x (%u) ignored\n", | |
830 | (int) ucs->int_in_buf[0], l); | |
cf7776dc HL |
831 | } |
832 | ||
833 | check_pending(ucs); | |
024fd299 | 834 | wake_up(&ucs->waitqueue); |
cf7776dc HL |
835 | |
836 | resubmit: | |
54e6ecb2 | 837 | rc = usb_submit_urb(urb, GFP_ATOMIC); |
73a88814 | 838 | if (unlikely(rc != 0 && rc != -ENODEV)) { |
784d5858 | 839 | dev_err(cs->dev, "could not resubmit interrupt URB: %s\n", |
73a88814 | 840 | get_usb_rcmsg(rc)); |
cf7776dc HL |
841 | error_reset(cs); |
842 | } | |
843 | } | |
844 | ||
cf7776dc HL |
845 | /* read_iso_callback |
846 | * USB completion handler for B channel isochronous input | |
847 | * called by the USB subsystem in interrupt context | |
848 | * parameter: | |
849 | * urb USB request block of completed request | |
850 | * urb->context = bc_state structure | |
851 | */ | |
7d12e780 | 852 | static void read_iso_callback(struct urb *urb) |
cf7776dc HL |
853 | { |
854 | struct bc_state *bcs; | |
855 | struct bas_bc_state *ubc; | |
dbd98231 | 856 | int status = urb->status; |
cf7776dc HL |
857 | unsigned long flags; |
858 | int i, rc; | |
859 | ||
cf7776dc | 860 | /* status codes not worth bothering the tasklet with */ |
dbd98231 TS |
861 | if (unlikely(status == -ENOENT || |
862 | status == -ECONNRESET || | |
863 | status == -EINPROGRESS || | |
864 | status == -ENODEV || | |
865 | status == -ESHUTDOWN)) { | |
784d5858 | 866 | gig_dbg(DEBUG_ISO, "%s: %s", |
dbd98231 | 867 | __func__, get_usb_statmsg(status)); |
cf7776dc HL |
868 | return; |
869 | } | |
870 | ||
d48c7784 | 871 | bcs = urb->context; |
cf7776dc | 872 | ubc = bcs->hw.bas; |
cf7776dc HL |
873 | |
874 | spin_lock_irqsave(&ubc->isoinlock, flags); | |
875 | if (likely(ubc->isoindone == NULL)) { | |
876 | /* pass URB to tasklet */ | |
877 | ubc->isoindone = urb; | |
dbd98231 | 878 | ubc->isoinstatus = status; |
368fd81d | 879 | tasklet_hi_schedule(&ubc->rcvd_tasklet); |
cf7776dc HL |
880 | } else { |
881 | /* tasklet still busy, drop data and resubmit URB */ | |
bb7196d2 | 882 | gig_dbg(DEBUG_ISO, "%s: overrun", __func__); |
dbd98231 | 883 | ubc->loststatus = status; |
cf7776dc HL |
884 | for (i = 0; i < BAS_NUMFRAMES; i++) { |
885 | ubc->isoinlost += urb->iso_frame_desc[i].actual_length; | |
886 | if (unlikely(urb->iso_frame_desc[i].status != 0 && | |
f86936ff | 887 | urb->iso_frame_desc[i].status != -EINPROGRESS)) |
cf7776dc | 888 | ubc->loststatus = urb->iso_frame_desc[i].status; |
cf7776dc HL |
889 | urb->iso_frame_desc[i].status = 0; |
890 | urb->iso_frame_desc[i].actual_length = 0; | |
891 | } | |
9d4bee2b | 892 | if (likely(ubc->running)) { |
784d5858 TS |
893 | /* urb->dev is clobbered by USB subsystem */ |
894 | urb->dev = bcs->cs->hw.bas->udev; | |
cf7776dc HL |
895 | urb->transfer_flags = URB_ISO_ASAP; |
896 | urb->number_of_packets = BAS_NUMFRAMES; | |
54e6ecb2 | 897 | rc = usb_submit_urb(urb, GFP_ATOMIC); |
73a88814 | 898 | if (unlikely(rc != 0 && rc != -ENODEV)) { |
784d5858 | 899 | dev_err(bcs->cs->dev, |
475be4d8 | 900 | "could not resubmit isoc read URB: %s\n", |
bb7196d2 | 901 | get_usb_rcmsg(rc)); |
cf7776dc HL |
902 | dump_urb(DEBUG_ISO, "isoc read", urb); |
903 | error_hangup(bcs); | |
904 | } | |
905 | } | |
906 | } | |
907 | spin_unlock_irqrestore(&ubc->isoinlock, flags); | |
908 | } | |
909 | ||
910 | /* write_iso_callback | |
911 | * USB completion handler for B channel isochronous output | |
912 | * called by the USB subsystem in interrupt context | |
913 | * parameter: | |
914 | * urb USB request block of completed request | |
915 | * urb->context = isow_urbctx_t structure | |
916 | */ | |
7d12e780 | 917 | static void write_iso_callback(struct urb *urb) |
cf7776dc HL |
918 | { |
919 | struct isow_urbctx_t *ucx; | |
920 | struct bas_bc_state *ubc; | |
dbd98231 | 921 | int status = urb->status; |
cf7776dc HL |
922 | unsigned long flags; |
923 | ||
cf7776dc | 924 | /* status codes not worth bothering the tasklet with */ |
dbd98231 TS |
925 | if (unlikely(status == -ENOENT || |
926 | status == -ECONNRESET || | |
927 | status == -EINPROGRESS || | |
928 | status == -ENODEV || | |
929 | status == -ESHUTDOWN)) { | |
784d5858 | 930 | gig_dbg(DEBUG_ISO, "%s: %s", |
dbd98231 | 931 | __func__, get_usb_statmsg(status)); |
cf7776dc HL |
932 | return; |
933 | } | |
934 | ||
935 | /* pass URB context to tasklet */ | |
d48c7784 | 936 | ucx = urb->context; |
cf7776dc | 937 | ubc = ucx->bcs->hw.bas; |
dbd98231 | 938 | ucx->status = status; |
cf7776dc HL |
939 | |
940 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
941 | ubc->isooutovfl = ubc->isooutdone; | |
942 | ubc->isooutdone = ucx; | |
943 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
368fd81d | 944 | tasklet_hi_schedule(&ubc->sent_tasklet); |
cf7776dc HL |
945 | } |
946 | ||
947 | /* starturbs | |
948 | * prepare and submit USB request blocks for isochronous input and output | |
949 | * argument: | |
950 | * B channel control structure | |
951 | * return value: | |
952 | * 0 on success | |
953 | * < 0 on error (no URBs submitted) | |
954 | */ | |
955 | static int starturbs(struct bc_state *bcs) | |
956 | { | |
d48c7784 | 957 | struct bas_bc_state *ubc = bcs->hw.bas; |
cf7776dc | 958 | struct urb *urb; |
cf7776dc HL |
959 | int j, k; |
960 | int rc; | |
961 | ||
cf7776dc | 962 | /* initialize L2 reception */ |
088ec0cc | 963 | if (bcs->proto2 == L2_HDLC) |
cf7776dc HL |
964 | bcs->inputstate |= INS_flag_hunt; |
965 | ||
966 | /* submit all isochronous input URBs */ | |
9d4bee2b | 967 | ubc->running = 1; |
cf7776dc HL |
968 | for (k = 0; k < BAS_INURBS; k++) { |
969 | urb = ubc->isoinurbs[k]; | |
970 | if (!urb) { | |
cf7776dc HL |
971 | rc = -EFAULT; |
972 | goto error; | |
973 | } | |
974 | ||
975 | urb->dev = bcs->cs->hw.bas->udev; | |
976 | urb->pipe = usb_rcvisocpipe(urb->dev, 3 + 2 * bcs->channel); | |
977 | urb->transfer_flags = URB_ISO_ASAP; | |
978 | urb->transfer_buffer = ubc->isoinbuf + k * BAS_INBUFSIZE; | |
979 | urb->transfer_buffer_length = BAS_INBUFSIZE; | |
980 | urb->number_of_packets = BAS_NUMFRAMES; | |
981 | urb->interval = BAS_FRAMETIME; | |
982 | urb->complete = read_iso_callback; | |
983 | urb->context = bcs; | |
984 | for (j = 0; j < BAS_NUMFRAMES; j++) { | |
985 | urb->iso_frame_desc[j].offset = j * BAS_MAXFRAME; | |
986 | urb->iso_frame_desc[j].length = BAS_MAXFRAME; | |
987 | urb->iso_frame_desc[j].status = 0; | |
988 | urb->iso_frame_desc[j].actual_length = 0; | |
989 | } | |
990 | ||
991 | dump_urb(DEBUG_ISO, "Initial isoc read", urb); | |
7891adf1 TS |
992 | rc = usb_submit_urb(urb, GFP_ATOMIC); |
993 | if (rc != 0) | |
cf7776dc | 994 | goto error; |
cf7776dc HL |
995 | } |
996 | ||
997 | /* initialize L2 transmission */ | |
998 | gigaset_isowbuf_init(ubc->isooutbuf, PPP_FLAG); | |
999 | ||
1000 | /* set up isochronous output URBs for flag idling */ | |
1001 | for (k = 0; k < BAS_OUTURBS; ++k) { | |
1002 | urb = ubc->isoouturbs[k].urb; | |
1003 | if (!urb) { | |
cf7776dc HL |
1004 | rc = -EFAULT; |
1005 | goto error; | |
1006 | } | |
1007 | urb->dev = bcs->cs->hw.bas->udev; | |
1008 | urb->pipe = usb_sndisocpipe(urb->dev, 4 + 2 * bcs->channel); | |
1009 | urb->transfer_flags = URB_ISO_ASAP; | |
1010 | urb->transfer_buffer = ubc->isooutbuf->data; | |
1011 | urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data); | |
1012 | urb->number_of_packets = BAS_NUMFRAMES; | |
1013 | urb->interval = BAS_FRAMETIME; | |
1014 | urb->complete = write_iso_callback; | |
1015 | urb->context = &ubc->isoouturbs[k]; | |
1016 | for (j = 0; j < BAS_NUMFRAMES; ++j) { | |
1017 | urb->iso_frame_desc[j].offset = BAS_OUTBUFSIZE; | |
1018 | urb->iso_frame_desc[j].length = BAS_NORMFRAME; | |
1019 | urb->iso_frame_desc[j].status = 0; | |
1020 | urb->iso_frame_desc[j].actual_length = 0; | |
1021 | } | |
1022 | ubc->isoouturbs[k].limit = -1; | |
1023 | } | |
1024 | ||
c652cbd8 | 1025 | /* keep one URB free, submit the others */ |
475be4d8 | 1026 | for (k = 0; k < BAS_OUTURBS - 1; ++k) { |
cf7776dc | 1027 | dump_urb(DEBUG_ISO, "Initial isoc write", urb); |
54e6ecb2 | 1028 | rc = usb_submit_urb(ubc->isoouturbs[k].urb, GFP_ATOMIC); |
73a88814 | 1029 | if (rc != 0) |
cf7776dc | 1030 | goto error; |
cf7776dc HL |
1031 | } |
1032 | dump_urb(DEBUG_ISO, "Initial isoc write (free)", urb); | |
475be4d8 | 1033 | ubc->isooutfree = &ubc->isoouturbs[BAS_OUTURBS - 1]; |
cf7776dc HL |
1034 | ubc->isooutdone = ubc->isooutovfl = NULL; |
1035 | return 0; | |
475be4d8 | 1036 | error: |
cf7776dc HL |
1037 | stopurbs(ubc); |
1038 | return rc; | |
1039 | } | |
1040 | ||
1041 | /* stopurbs | |
1042 | * cancel the USB request blocks for isochronous input and output | |
1043 | * errors are silently ignored | |
1044 | * argument: | |
1045 | * B channel control structure | |
1046 | */ | |
1047 | static void stopurbs(struct bas_bc_state *ubc) | |
1048 | { | |
1049 | int k, rc; | |
1050 | ||
9d4bee2b | 1051 | ubc->running = 0; |
cf7776dc HL |
1052 | |
1053 | for (k = 0; k < BAS_INURBS; ++k) { | |
1054 | rc = usb_unlink_urb(ubc->isoinurbs[k]); | |
784d5858 | 1055 | gig_dbg(DEBUG_ISO, |
73a88814 TS |
1056 | "%s: isoc input URB %d unlinked, result = %s", |
1057 | __func__, k, get_usb_rcmsg(rc)); | |
cf7776dc HL |
1058 | } |
1059 | ||
1060 | for (k = 0; k < BAS_OUTURBS; ++k) { | |
1061 | rc = usb_unlink_urb(ubc->isoouturbs[k].urb); | |
784d5858 | 1062 | gig_dbg(DEBUG_ISO, |
73a88814 TS |
1063 | "%s: isoc output URB %d unlinked, result = %s", |
1064 | __func__, k, get_usb_rcmsg(rc)); | |
cf7776dc HL |
1065 | } |
1066 | } | |
1067 | ||
1068 | /* Isochronous Write - Bottom Half */ | |
1069 | /* =============================== */ | |
1070 | ||
1071 | /* submit_iso_write_urb | |
1072 | * fill and submit the next isochronous write URB | |
1073 | * parameters: | |
73a88814 | 1074 | * ucx context structure containing URB |
cf7776dc HL |
1075 | * return value: |
1076 | * number of frames submitted in URB | |
1077 | * 0 if URB not submitted because no data available (isooutbuf busy) | |
1078 | * error code < 0 on error | |
1079 | */ | |
1080 | static int submit_iso_write_urb(struct isow_urbctx_t *ucx) | |
1081 | { | |
d48c7784 TS |
1082 | struct urb *urb = ucx->urb; |
1083 | struct bas_bc_state *ubc = ucx->bcs->hw.bas; | |
cf7776dc HL |
1084 | struct usb_iso_packet_descriptor *ifd; |
1085 | int corrbytes, nframe, rc; | |
1086 | ||
784d5858 TS |
1087 | /* urb->dev is clobbered by USB subsystem */ |
1088 | urb->dev = ucx->bcs->cs->hw.bas->udev; | |
cf7776dc HL |
1089 | urb->transfer_flags = URB_ISO_ASAP; |
1090 | urb->transfer_buffer = ubc->isooutbuf->data; | |
1091 | urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data); | |
1092 | ||
1093 | for (nframe = 0; nframe < BAS_NUMFRAMES; nframe++) { | |
1094 | ifd = &urb->iso_frame_desc[nframe]; | |
1095 | ||
1096 | /* compute frame length according to flow control */ | |
1097 | ifd->length = BAS_NORMFRAME; | |
7891adf1 TS |
1098 | corrbytes = atomic_read(&ubc->corrbytes); |
1099 | if (corrbytes != 0) { | |
784d5858 TS |
1100 | gig_dbg(DEBUG_ISO, "%s: corrbytes=%d", |
1101 | __func__, corrbytes); | |
cf7776dc HL |
1102 | if (corrbytes > BAS_HIGHFRAME - BAS_NORMFRAME) |
1103 | corrbytes = BAS_HIGHFRAME - BAS_NORMFRAME; | |
1104 | else if (corrbytes < BAS_LOWFRAME - BAS_NORMFRAME) | |
1105 | corrbytes = BAS_LOWFRAME - BAS_NORMFRAME; | |
1106 | ifd->length += corrbytes; | |
1107 | atomic_add(-corrbytes, &ubc->corrbytes); | |
1108 | } | |
cf7776dc HL |
1109 | |
1110 | /* retrieve block of data to send */ | |
5f09c4c7 TS |
1111 | rc = gigaset_isowbuf_getbytes(ubc->isooutbuf, ifd->length); |
1112 | if (rc < 0) { | |
1113 | if (rc == -EBUSY) { | |
784d5858 TS |
1114 | gig_dbg(DEBUG_ISO, |
1115 | "%s: buffer busy at frame %d", | |
1116 | __func__, nframe); | |
1117 | /* tasklet will be restarted from | |
088ec0cc | 1118 | gigaset_isoc_send_skb() */ |
cf7776dc | 1119 | } else { |
784d5858 TS |
1120 | dev_err(ucx->bcs->cs->dev, |
1121 | "%s: buffer error %d at frame %d\n", | |
5f09c4c7 TS |
1122 | __func__, rc, nframe); |
1123 | return rc; | |
cf7776dc HL |
1124 | } |
1125 | break; | |
1126 | } | |
5f09c4c7 | 1127 | ifd->offset = rc; |
9d4bee2b | 1128 | ucx->limit = ubc->isooutbuf->nextread; |
cf7776dc HL |
1129 | ifd->status = 0; |
1130 | ifd->actual_length = 0; | |
1131 | } | |
73a88814 TS |
1132 | if (unlikely(nframe == 0)) |
1133 | return 0; /* no data to send */ | |
1134 | urb->number_of_packets = nframe; | |
69049cc8 | 1135 | |
54e6ecb2 | 1136 | rc = usb_submit_urb(urb, GFP_ATOMIC); |
73a88814 TS |
1137 | if (unlikely(rc)) { |
1138 | if (rc == -ENODEV) | |
1139 | /* device removed - give up silently */ | |
1140 | gig_dbg(DEBUG_ISO, "%s: disconnected", __func__); | |
1141 | else | |
784d5858 | 1142 | dev_err(ucx->bcs->cs->dev, |
bb7196d2 | 1143 | "could not submit isoc write URB: %s\n", |
73a88814 TS |
1144 | get_usb_rcmsg(rc)); |
1145 | return rc; | |
cf7776dc | 1146 | } |
73a88814 | 1147 | ++ubc->numsub; |
cf7776dc HL |
1148 | return nframe; |
1149 | } | |
1150 | ||
1151 | /* write_iso_tasklet | |
1152 | * tasklet scheduled when an isochronous output URB from the Gigaset device | |
1153 | * has completed | |
1154 | * parameter: | |
1155 | * data B channel state structure | |
1156 | */ | |
1157 | static void write_iso_tasklet(unsigned long data) | |
1158 | { | |
d48c7784 TS |
1159 | struct bc_state *bcs = (struct bc_state *) data; |
1160 | struct bas_bc_state *ubc = bcs->hw.bas; | |
1161 | struct cardstate *cs = bcs->cs; | |
cf7776dc HL |
1162 | struct isow_urbctx_t *done, *next, *ovfl; |
1163 | struct urb *urb; | |
dbd98231 | 1164 | int status; |
cf7776dc | 1165 | struct usb_iso_packet_descriptor *ifd; |
cf7776dc HL |
1166 | unsigned long flags; |
1167 | int i; | |
1168 | struct sk_buff *skb; | |
1169 | int len; | |
73a88814 | 1170 | int rc; |
cf7776dc | 1171 | |
cf7776dc HL |
1172 | /* loop while completed URBs arrive in time */ |
1173 | for (;;) { | |
9d4bee2b | 1174 | if (unlikely(!(ubc->running))) { |
784d5858 | 1175 | gig_dbg(DEBUG_ISO, "%s: not running", __func__); |
cf7776dc HL |
1176 | return; |
1177 | } | |
1178 | ||
1179 | /* retrieve completed URBs */ | |
1180 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1181 | done = ubc->isooutdone; | |
1182 | ubc->isooutdone = NULL; | |
1183 | ovfl = ubc->isooutovfl; | |
1184 | ubc->isooutovfl = NULL; | |
1185 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1186 | if (ovfl) { | |
bb7196d2 | 1187 | dev_err(cs->dev, "isoc write underrun\n"); |
cf7776dc HL |
1188 | error_hangup(bcs); |
1189 | break; | |
1190 | } | |
1191 | if (!done) | |
1192 | break; | |
1193 | ||
1194 | /* submit free URB if available */ | |
1195 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1196 | next = ubc->isooutfree; | |
1197 | ubc->isooutfree = NULL; | |
1198 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1199 | if (next) { | |
73a88814 TS |
1200 | rc = submit_iso_write_urb(next); |
1201 | if (unlikely(rc <= 0 && rc != -ENODEV)) { | |
cf7776dc HL |
1202 | /* could not submit URB, put it back */ |
1203 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1204 | if (ubc->isooutfree == NULL) { | |
1205 | ubc->isooutfree = next; | |
1206 | next = NULL; | |
1207 | } | |
1208 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1209 | if (next) { | |
1210 | /* couldn't put it back */ | |
784d5858 | 1211 | dev_err(cs->dev, |
bb7196d2 | 1212 | "losing isoc write URB\n"); |
cf7776dc HL |
1213 | error_hangup(bcs); |
1214 | } | |
1215 | } | |
1216 | } | |
1217 | ||
1218 | /* process completed URB */ | |
1219 | urb = done->urb; | |
dbd98231 TS |
1220 | status = done->status; |
1221 | switch (status) { | |
73a88814 TS |
1222 | case -EXDEV: /* partial completion */ |
1223 | gig_dbg(DEBUG_ISO, "%s: URB partially completed", | |
1224 | __func__); | |
1225 | /* fall through - what's the difference anyway? */ | |
cf7776dc | 1226 | case 0: /* normal completion */ |
73a88814 TS |
1227 | /* inspect individual frames |
1228 | * assumptions (for lack of documentation): | |
1229 | * - actual_length bytes of first frame in error are | |
917f5085 | 1230 | * successfully sent |
cf7776dc HL |
1231 | * - all following frames are not sent at all |
1232 | */ | |
cf7776dc HL |
1233 | for (i = 0; i < BAS_NUMFRAMES; i++) { |
1234 | ifd = &urb->iso_frame_desc[i]; | |
1235 | if (ifd->status || | |
1236 | ifd->actual_length != ifd->length) { | |
784d5858 | 1237 | dev_warn(cs->dev, |
475be4d8 | 1238 | "isoc write: frame %d[%d/%d]: %s\n", |
bb7196d2 TS |
1239 | i, ifd->actual_length, |
1240 | ifd->length, | |
1241 | get_usb_statmsg(ifd->status)); | |
cf7776dc HL |
1242 | break; |
1243 | } | |
1244 | } | |
cf7776dc | 1245 | break; |
73a88814 | 1246 | case -EPIPE: /* stall - probably underrun */ |
bb7196d2 | 1247 | dev_err(cs->dev, "isoc write: stalled\n"); |
cf7776dc HL |
1248 | error_hangup(bcs); |
1249 | break; | |
bb7196d2 TS |
1250 | default: /* other errors */ |
1251 | dev_warn(cs->dev, "isoc write: %s\n", | |
dbd98231 | 1252 | get_usb_statmsg(status)); |
cf7776dc HL |
1253 | } |
1254 | ||
1255 | /* mark the write buffer area covered by this URB as free */ | |
1256 | if (done->limit >= 0) | |
9d4bee2b | 1257 | ubc->isooutbuf->read = done->limit; |
cf7776dc HL |
1258 | |
1259 | /* mark URB as free */ | |
1260 | spin_lock_irqsave(&ubc->isooutlock, flags); | |
1261 | next = ubc->isooutfree; | |
1262 | ubc->isooutfree = done; | |
1263 | spin_unlock_irqrestore(&ubc->isooutlock, flags); | |
1264 | if (next) { | |
1265 | /* only one URB still active - resubmit one */ | |
73a88814 TS |
1266 | rc = submit_iso_write_urb(next); |
1267 | if (unlikely(rc <= 0 && rc != -ENODEV)) { | |
cf7776dc HL |
1268 | /* couldn't submit */ |
1269 | error_hangup(bcs); | |
1270 | } | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | /* process queued SKBs */ | |
1275 | while ((skb = skb_dequeue(&bcs->squeue))) { | |
1276 | /* copy to output buffer, doing L2 encapsulation */ | |
1277 | len = skb->len; | |
1278 | if (gigaset_isoc_buildframe(bcs, skb->data, len) == -EAGAIN) { | |
1279 | /* insufficient buffer space, push back onto queue */ | |
1280 | skb_queue_head(&bcs->squeue, skb); | |
784d5858 TS |
1281 | gig_dbg(DEBUG_ISO, "%s: skb requeued, qlen=%d", |
1282 | __func__, skb_queue_len(&bcs->squeue)); | |
cf7776dc HL |
1283 | break; |
1284 | } | |
1285 | skb_pull(skb, len); | |
1286 | gigaset_skb_sent(bcs, skb); | |
1287 | dev_kfree_skb_any(skb); | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | /* Isochronous Read - Bottom Half */ | |
1292 | /* ============================== */ | |
1293 | ||
1294 | /* read_iso_tasklet | |
1295 | * tasklet scheduled when an isochronous input URB from the Gigaset device | |
1296 | * has completed | |
1297 | * parameter: | |
1298 | * data B channel state structure | |
1299 | */ | |
1300 | static void read_iso_tasklet(unsigned long data) | |
1301 | { | |
d48c7784 TS |
1302 | struct bc_state *bcs = (struct bc_state *) data; |
1303 | struct bas_bc_state *ubc = bcs->hw.bas; | |
1304 | struct cardstate *cs = bcs->cs; | |
cf7776dc | 1305 | struct urb *urb; |
dbd98231 | 1306 | int status; |
bb7196d2 | 1307 | struct usb_iso_packet_descriptor *ifd; |
cf7776dc HL |
1308 | char *rcvbuf; |
1309 | unsigned long flags; | |
1310 | int totleft, numbytes, offset, frame, rc; | |
1311 | ||
cf7776dc HL |
1312 | /* loop while more completed URBs arrive in the meantime */ |
1313 | for (;;) { | |
cf7776dc HL |
1314 | /* retrieve URB */ |
1315 | spin_lock_irqsave(&ubc->isoinlock, flags); | |
7891adf1 TS |
1316 | urb = ubc->isoindone; |
1317 | if (!urb) { | |
cf7776dc HL |
1318 | spin_unlock_irqrestore(&ubc->isoinlock, flags); |
1319 | return; | |
1320 | } | |
dbd98231 | 1321 | status = ubc->isoinstatus; |
cf7776dc HL |
1322 | ubc->isoindone = NULL; |
1323 | if (unlikely(ubc->loststatus != -EINPROGRESS)) { | |
784d5858 | 1324 | dev_warn(cs->dev, |
475be4d8 | 1325 | "isoc read overrun, URB dropped (status: %s, %d bytes)\n", |
784d5858 TS |
1326 | get_usb_statmsg(ubc->loststatus), |
1327 | ubc->isoinlost); | |
cf7776dc HL |
1328 | ubc->loststatus = -EINPROGRESS; |
1329 | } | |
1330 | spin_unlock_irqrestore(&ubc->isoinlock, flags); | |
1331 | ||
9d4bee2b | 1332 | if (unlikely(!(ubc->running))) { |
784d5858 TS |
1333 | gig_dbg(DEBUG_ISO, |
1334 | "%s: channel not running, " | |
1335 | "dropped URB with status: %s", | |
dbd98231 | 1336 | __func__, get_usb_statmsg(status)); |
cf7776dc HL |
1337 | return; |
1338 | } | |
1339 | ||
dbd98231 | 1340 | switch (status) { |
cf7776dc HL |
1341 | case 0: /* normal completion */ |
1342 | break; | |
917f5085 TS |
1343 | case -EXDEV: /* inspect individual frames |
1344 | (we do that anyway) */ | |
784d5858 TS |
1345 | gig_dbg(DEBUG_ISO, "%s: URB partially completed", |
1346 | __func__); | |
cf7776dc HL |
1347 | break; |
1348 | case -ENOENT: | |
1349 | case -ECONNRESET: | |
73a88814 TS |
1350 | case -EINPROGRESS: |
1351 | gig_dbg(DEBUG_ISO, "%s: %s", | |
dbd98231 | 1352 | __func__, get_usb_statmsg(status)); |
cf7776dc HL |
1353 | continue; /* -> skip */ |
1354 | case -EPIPE: | |
bb7196d2 | 1355 | dev_err(cs->dev, "isoc read: stalled\n"); |
cf7776dc HL |
1356 | error_hangup(bcs); |
1357 | continue; /* -> skip */ | |
bb7196d2 TS |
1358 | default: /* other error */ |
1359 | dev_warn(cs->dev, "isoc read: %s\n", | |
dbd98231 | 1360 | get_usb_statmsg(status)); |
cf7776dc HL |
1361 | goto error; |
1362 | } | |
1363 | ||
1364 | rcvbuf = urb->transfer_buffer; | |
1365 | totleft = urb->actual_length; | |
1366 | for (frame = 0; totleft > 0 && frame < BAS_NUMFRAMES; frame++) { | |
bb7196d2 TS |
1367 | ifd = &urb->iso_frame_desc[frame]; |
1368 | numbytes = ifd->actual_length; | |
1369 | switch (ifd->status) { | |
1370 | case 0: /* success */ | |
1371 | break; | |
1372 | case -EPROTO: /* protocol error or unplug */ | |
1373 | case -EILSEQ: | |
1374 | case -ETIME: | |
1375 | /* probably just disconnected, ignore */ | |
1376 | gig_dbg(DEBUG_ISO, | |
1377 | "isoc read: frame %d[%d]: %s\n", | |
1378 | frame, numbytes, | |
1379 | get_usb_statmsg(ifd->status)); | |
1380 | break; | |
1381 | default: /* other error */ | |
1382 | /* report, assume transferred bytes are ok */ | |
784d5858 | 1383 | dev_warn(cs->dev, |
bb7196d2 | 1384 | "isoc read: frame %d[%d]: %s\n", |
eb4459ff | 1385 | frame, numbytes, |
bb7196d2 TS |
1386 | get_usb_statmsg(ifd->status)); |
1387 | } | |
eb4459ff | 1388 | if (unlikely(numbytes > BAS_MAXFRAME)) |
784d5858 | 1389 | dev_warn(cs->dev, |
bb7196d2 TS |
1390 | "isoc read: frame %d[%d]: %s\n", |
1391 | frame, numbytes, | |
1392 | "exceeds max frame size"); | |
cf7776dc | 1393 | if (unlikely(numbytes > totleft)) { |
784d5858 | 1394 | dev_warn(cs->dev, |
bb7196d2 TS |
1395 | "isoc read: frame %d[%d]: %s\n", |
1396 | frame, numbytes, | |
1397 | "exceeds total transfer length"); | |
eb4459ff | 1398 | numbytes = totleft; |
cf7776dc | 1399 | } |
bb7196d2 | 1400 | offset = ifd->offset; |
cf7776dc | 1401 | if (unlikely(offset + numbytes > BAS_INBUFSIZE)) { |
784d5858 | 1402 | dev_warn(cs->dev, |
bb7196d2 TS |
1403 | "isoc read: frame %d[%d]: %s\n", |
1404 | frame, numbytes, | |
1405 | "exceeds end of buffer"); | |
eb4459ff | 1406 | numbytes = BAS_INBUFSIZE - offset; |
cf7776dc HL |
1407 | } |
1408 | gigaset_isoc_receive(rcvbuf + offset, numbytes, bcs); | |
1409 | totleft -= numbytes; | |
1410 | } | |
1411 | if (unlikely(totleft > 0)) | |
bb7196d2 | 1412 | dev_warn(cs->dev, "isoc read: %d data bytes missing\n", |
784d5858 | 1413 | totleft); |
cf7776dc | 1414 | |
7891adf1 | 1415 | error: |
cf7776dc HL |
1416 | /* URB processed, resubmit */ |
1417 | for (frame = 0; frame < BAS_NUMFRAMES; frame++) { | |
1418 | urb->iso_frame_desc[frame].status = 0; | |
1419 | urb->iso_frame_desc[frame].actual_length = 0; | |
1420 | } | |
784d5858 TS |
1421 | /* urb->dev is clobbered by USB subsystem */ |
1422 | urb->dev = bcs->cs->hw.bas->udev; | |
cf7776dc HL |
1423 | urb->transfer_flags = URB_ISO_ASAP; |
1424 | urb->number_of_packets = BAS_NUMFRAMES; | |
54e6ecb2 | 1425 | rc = usb_submit_urb(urb, GFP_ATOMIC); |
73a88814 | 1426 | if (unlikely(rc != 0 && rc != -ENODEV)) { |
784d5858 | 1427 | dev_err(cs->dev, |
bb7196d2 | 1428 | "could not resubmit isoc read URB: %s\n", |
73a88814 | 1429 | get_usb_rcmsg(rc)); |
bb7196d2 | 1430 | dump_urb(DEBUG_ISO, "resubmit isoc read", urb); |
cf7776dc HL |
1431 | error_hangup(bcs); |
1432 | } | |
1433 | } | |
1434 | } | |
1435 | ||
1436 | /* Channel Operations */ | |
1437 | /* ================== */ | |
1438 | ||
1439 | /* req_timeout | |
1440 | * timeout routine for control output request | |
1441 | * argument: | |
1d5a9edc | 1442 | * controller state structure |
cf7776dc HL |
1443 | */ |
1444 | static void req_timeout(unsigned long data) | |
1445 | { | |
1d5a9edc TS |
1446 | struct cardstate *cs = (struct cardstate *) data; |
1447 | struct bas_cardstate *ucs = cs->hw.bas; | |
cf7776dc HL |
1448 | int pending; |
1449 | unsigned long flags; | |
1450 | ||
cf7776dc HL |
1451 | check_pending(ucs); |
1452 | ||
1453 | spin_lock_irqsave(&ucs->lock, flags); | |
1454 | pending = ucs->pending; | |
1455 | ucs->pending = 0; | |
1456 | spin_unlock_irqrestore(&ucs->lock, flags); | |
1457 | ||
1458 | switch (pending) { | |
1459 | case 0: /* no pending request */ | |
784d5858 | 1460 | gig_dbg(DEBUG_USBREQ, "%s: no request pending", __func__); |
cf7776dc HL |
1461 | break; |
1462 | ||
1463 | case HD_OPEN_ATCHANNEL: | |
1d5a9edc TS |
1464 | dev_err(cs->dev, "timeout opening AT channel\n"); |
1465 | error_reset(cs); | |
cf7776dc HL |
1466 | break; |
1467 | ||
cf7776dc | 1468 | case HD_OPEN_B1CHANNEL: |
1d5a9edc TS |
1469 | dev_err(cs->dev, "timeout opening channel 1\n"); |
1470 | error_hangup(&cs->bcs[0]); | |
1471 | break; | |
1472 | ||
1473 | case HD_OPEN_B2CHANNEL: | |
1474 | dev_err(cs->dev, "timeout opening channel 2\n"); | |
1475 | error_hangup(&cs->bcs[1]); | |
cf7776dc HL |
1476 | break; |
1477 | ||
1478 | case HD_CLOSE_ATCHANNEL: | |
1d5a9edc TS |
1479 | dev_err(cs->dev, "timeout closing AT channel\n"); |
1480 | error_reset(cs); | |
cf7776dc HL |
1481 | break; |
1482 | ||
cf7776dc | 1483 | case HD_CLOSE_B1CHANNEL: |
1d5a9edc TS |
1484 | dev_err(cs->dev, "timeout closing channel 1\n"); |
1485 | error_reset(cs); | |
1486 | break; | |
1487 | ||
1488 | case HD_CLOSE_B2CHANNEL: | |
1489 | dev_err(cs->dev, "timeout closing channel 2\n"); | |
1490 | error_reset(cs); | |
cf7776dc HL |
1491 | break; |
1492 | ||
b5f581d5 TS |
1493 | case HD_RESET_INTERRUPT_PIPE: |
1494 | /* error recovery escalation */ | |
1d5a9edc | 1495 | dev_err(cs->dev, |
b5f581d5 | 1496 | "reset interrupt pipe timeout, attempting USB reset\n"); |
1d5a9edc | 1497 | usb_queue_reset_device(ucs->interface); |
b5f581d5 TS |
1498 | break; |
1499 | ||
cf7776dc | 1500 | default: |
1d5a9edc | 1501 | dev_warn(cs->dev, "request 0x%02x timed out, clearing\n", |
784d5858 | 1502 | pending); |
cf7776dc | 1503 | } |
024fd299 TS |
1504 | |
1505 | wake_up(&ucs->waitqueue); | |
cf7776dc HL |
1506 | } |
1507 | ||
1508 | /* write_ctrl_callback | |
1509 | * USB completion handler for control pipe output | |
1510 | * called by the USB subsystem in interrupt context | |
1511 | * parameter: | |
1512 | * urb USB request block of completed request | |
1513 | * urb->context = hardware specific controller state structure | |
1514 | */ | |
7d12e780 | 1515 | static void write_ctrl_callback(struct urb *urb) |
cf7776dc | 1516 | { |
d48c7784 | 1517 | struct bas_cardstate *ucs = urb->context; |
dbd98231 | 1518 | int status = urb->status; |
06163f86 | 1519 | int rc; |
cf7776dc HL |
1520 | unsigned long flags; |
1521 | ||
06163f86 | 1522 | /* check status */ |
dbd98231 | 1523 | switch (status) { |
06163f86 TS |
1524 | case 0: /* normal completion */ |
1525 | spin_lock_irqsave(&ucs->lock, flags); | |
1526 | switch (ucs->pending) { | |
1527 | case HD_DEVICE_INIT_ACK: /* no reply expected */ | |
1528 | del_timer(&ucs->timer_ctrl); | |
1529 | ucs->pending = 0; | |
1530 | break; | |
1531 | } | |
1532 | spin_unlock_irqrestore(&ucs->lock, flags); | |
1533 | return; | |
1534 | ||
1535 | case -ENOENT: /* cancelled */ | |
1536 | case -ECONNRESET: /* cancelled (async) */ | |
1537 | case -EINPROGRESS: /* pending */ | |
1538 | case -ENODEV: /* device removed */ | |
1539 | case -ESHUTDOWN: /* device shut down */ | |
1540 | /* ignore silently */ | |
1541 | gig_dbg(DEBUG_USBREQ, "%s: %s", | |
dbd98231 | 1542 | __func__, get_usb_statmsg(status)); |
cf7776dc | 1543 | break; |
06163f86 TS |
1544 | |
1545 | default: /* any failure */ | |
024fd299 TS |
1546 | /* don't retry if suspend requested */ |
1547 | if (++ucs->retry_ctrl > BAS_RETRY || | |
9d4bee2b | 1548 | (ucs->basstate & BS_SUSPEND)) { |
06163f86 TS |
1549 | dev_err(&ucs->interface->dev, |
1550 | "control request 0x%02x failed: %s\n", | |
1551 | ucs->dr_ctrl.bRequest, | |
dbd98231 | 1552 | get_usb_statmsg(status)); |
06163f86 TS |
1553 | break; /* give up */ |
1554 | } | |
1555 | dev_notice(&ucs->interface->dev, | |
1556 | "control request 0x%02x: %s, retry %d\n", | |
dbd98231 | 1557 | ucs->dr_ctrl.bRequest, get_usb_statmsg(status), |
06163f86 TS |
1558 | ucs->retry_ctrl); |
1559 | /* urb->dev is clobbered by USB subsystem */ | |
1560 | urb->dev = ucs->udev; | |
54e6ecb2 | 1561 | rc = usb_submit_urb(urb, GFP_ATOMIC); |
06163f86 TS |
1562 | if (unlikely(rc)) { |
1563 | dev_err(&ucs->interface->dev, | |
1564 | "could not resubmit request 0x%02x: %s\n", | |
1565 | ucs->dr_ctrl.bRequest, get_usb_rcmsg(rc)); | |
1566 | break; | |
1567 | } | |
1568 | /* resubmitted */ | |
1569 | return; | |
cf7776dc | 1570 | } |
06163f86 TS |
1571 | |
1572 | /* failed, clear pending request */ | |
1573 | spin_lock_irqsave(&ucs->lock, flags); | |
1574 | del_timer(&ucs->timer_ctrl); | |
1575 | ucs->pending = 0; | |
cf7776dc | 1576 | spin_unlock_irqrestore(&ucs->lock, flags); |
024fd299 | 1577 | wake_up(&ucs->waitqueue); |
cf7776dc HL |
1578 | } |
1579 | ||
1580 | /* req_submit | |
1581 | * submit a control output request without message buffer to the Gigaset base | |
1582 | * and optionally start a timeout | |
1583 | * parameters: | |
1584 | * bcs B channel control structure | |
1585 | * req control request code (HD_*) | |
1586 | * val control request parameter value (set to 0 if unused) | |
1587 | * timeout timeout in seconds (0: no timeout) | |
1588 | * return value: | |
1589 | * 0 on success | |
cf7776dc HL |
1590 | * -EBUSY if another request is pending |
1591 | * any URB submission error code | |
1592 | */ | |
1593 | static int req_submit(struct bc_state *bcs, int req, int val, int timeout) | |
1594 | { | |
d48c7784 | 1595 | struct bas_cardstate *ucs = bcs->cs->hw.bas; |
cf7776dc HL |
1596 | int ret; |
1597 | unsigned long flags; | |
1598 | ||
784d5858 | 1599 | gig_dbg(DEBUG_USBREQ, "-------> 0x%02x (%d)", req, val); |
cf7776dc HL |
1600 | |
1601 | spin_lock_irqsave(&ucs->lock, flags); | |
1602 | if (ucs->pending) { | |
1603 | spin_unlock_irqrestore(&ucs->lock, flags); | |
784d5858 TS |
1604 | dev_err(bcs->cs->dev, |
1605 | "submission of request 0x%02x failed: " | |
1606 | "request 0x%02x still pending\n", | |
1607 | req, ucs->pending); | |
cf7776dc HL |
1608 | return -EBUSY; |
1609 | } | |
cf7776dc HL |
1610 | |
1611 | ucs->dr_ctrl.bRequestType = OUT_VENDOR_REQ; | |
1612 | ucs->dr_ctrl.bRequest = req; | |
1613 | ucs->dr_ctrl.wValue = cpu_to_le16(val); | |
1614 | ucs->dr_ctrl.wIndex = 0; | |
1615 | ucs->dr_ctrl.wLength = 0; | |
1616 | usb_fill_control_urb(ucs->urb_ctrl, ucs->udev, | |
784d5858 | 1617 | usb_sndctrlpipe(ucs->udev, 0), |
7891adf1 | 1618 | (unsigned char *) &ucs->dr_ctrl, NULL, 0, |
784d5858 | 1619 | write_ctrl_callback, ucs); |
06163f86 | 1620 | ucs->retry_ctrl = 0; |
54e6ecb2 | 1621 | ret = usb_submit_urb(ucs->urb_ctrl, GFP_ATOMIC); |
06163f86 | 1622 | if (unlikely(ret)) { |
784d5858 | 1623 | dev_err(bcs->cs->dev, "could not submit request 0x%02x: %s\n", |
06163f86 | 1624 | req, get_usb_rcmsg(ret)); |
cf7776dc HL |
1625 | spin_unlock_irqrestore(&ucs->lock, flags); |
1626 | return ret; | |
1627 | } | |
1628 | ucs->pending = req; | |
1629 | ||
1630 | if (timeout > 0) { | |
784d5858 | 1631 | gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout); |
1d5a9edc | 1632 | mod_timer(&ucs->timer_ctrl, jiffies + timeout * HZ / 10); |
cf7776dc HL |
1633 | } |
1634 | ||
1635 | spin_unlock_irqrestore(&ucs->lock, flags); | |
1636 | return 0; | |
1637 | } | |
1638 | ||
1639 | /* gigaset_init_bchannel | |
1640 | * called by common.c to connect a B channel | |
1641 | * initialize isochronous I/O and tell the Gigaset base to open the channel | |
1642 | * argument: | |
1643 | * B channel control structure | |
1644 | * return value: | |
1645 | * 0 on success, error code < 0 on error | |
1646 | */ | |
1647 | static int gigaset_init_bchannel(struct bc_state *bcs) | |
1648 | { | |
c652cbd8 | 1649 | struct cardstate *cs = bcs->cs; |
cf7776dc | 1650 | int req, ret; |
73a88814 TS |
1651 | unsigned long flags; |
1652 | ||
c652cbd8 TS |
1653 | spin_lock_irqsave(&cs->lock, flags); |
1654 | if (unlikely(!cs->connected)) { | |
73a88814 | 1655 | gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__); |
c652cbd8 | 1656 | spin_unlock_irqrestore(&cs->lock, flags); |
73a88814 TS |
1657 | return -ENODEV; |
1658 | } | |
cf7776dc | 1659 | |
9d4bee2b | 1660 | if (cs->hw.bas->basstate & BS_SUSPEND) { |
024fd299 | 1661 | dev_notice(cs->dev, |
bb7196d2 | 1662 | "not starting isoc I/O, suspend in progress\n"); |
024fd299 TS |
1663 | spin_unlock_irqrestore(&cs->lock, flags); |
1664 | return -EHOSTUNREACH; | |
1665 | } | |
1666 | ||
7891adf1 TS |
1667 | ret = starturbs(bcs); |
1668 | if (ret < 0) { | |
b33ffa5c | 1669 | spin_unlock_irqrestore(&cs->lock, flags); |
c652cbd8 | 1670 | dev_err(cs->dev, |
bb7196d2 | 1671 | "could not start isoc I/O for channel B%d: %s\n", |
73a88814 TS |
1672 | bcs->channel + 1, |
1673 | ret == -EFAULT ? "null URB" : get_usb_rcmsg(ret)); | |
1674 | if (ret != -ENODEV) | |
1675 | error_hangup(bcs); | |
cf7776dc HL |
1676 | return ret; |
1677 | } | |
1678 | ||
1679 | req = bcs->channel ? HD_OPEN_B2CHANNEL : HD_OPEN_B1CHANNEL; | |
7891adf1 TS |
1680 | ret = req_submit(bcs, req, 0, BAS_TIMEOUT); |
1681 | if (ret < 0) { | |
c652cbd8 | 1682 | dev_err(cs->dev, "could not open channel B%d\n", |
73a88814 | 1683 | bcs->channel + 1); |
cf7776dc | 1684 | stopurbs(bcs->hw.bas); |
cf7776dc | 1685 | } |
73a88814 | 1686 | |
c652cbd8 | 1687 | spin_unlock_irqrestore(&cs->lock, flags); |
b33ffa5c TS |
1688 | if (ret < 0 && ret != -ENODEV) |
1689 | error_hangup(bcs); | |
cf7776dc HL |
1690 | return ret; |
1691 | } | |
1692 | ||
1693 | /* gigaset_close_bchannel | |
1694 | * called by common.c to disconnect a B channel | |
1695 | * tell the Gigaset base to close the channel | |
1696 | * stopping isochronous I/O and LL notification will be done when the | |
1697 | * acknowledgement for the close arrives | |
1698 | * argument: | |
1699 | * B channel control structure | |
1700 | * return value: | |
1701 | * 0 on success, error code < 0 on error | |
1702 | */ | |
1703 | static int gigaset_close_bchannel(struct bc_state *bcs) | |
1704 | { | |
c652cbd8 | 1705 | struct cardstate *cs = bcs->cs; |
cf7776dc | 1706 | int req, ret; |
73a88814 TS |
1707 | unsigned long flags; |
1708 | ||
c652cbd8 TS |
1709 | spin_lock_irqsave(&cs->lock, flags); |
1710 | if (unlikely(!cs->connected)) { | |
1711 | spin_unlock_irqrestore(&cs->lock, flags); | |
73a88814 TS |
1712 | gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__); |
1713 | return -ENODEV; | |
1714 | } | |
cf7776dc | 1715 | |
9d4bee2b | 1716 | if (!(cs->hw.bas->basstate & (bcs->channel ? BS_B2OPEN : BS_B1OPEN))) { |
cf7776dc | 1717 | /* channel not running: just signal common.c */ |
c652cbd8 | 1718 | spin_unlock_irqrestore(&cs->lock, flags); |
cf7776dc HL |
1719 | gigaset_bchannel_down(bcs); |
1720 | return 0; | |
1721 | } | |
1722 | ||
73a88814 | 1723 | /* channel running: tell device to close it */ |
cf7776dc | 1724 | req = bcs->channel ? HD_CLOSE_B2CHANNEL : HD_CLOSE_B1CHANNEL; |
7891adf1 TS |
1725 | ret = req_submit(bcs, req, 0, BAS_TIMEOUT); |
1726 | if (ret < 0) | |
c652cbd8 | 1727 | dev_err(cs->dev, "closing channel B%d failed\n", |
73a88814 TS |
1728 | bcs->channel + 1); |
1729 | ||
c652cbd8 | 1730 | spin_unlock_irqrestore(&cs->lock, flags); |
cf7776dc HL |
1731 | return ret; |
1732 | } | |
1733 | ||
1734 | /* Device Operations */ | |
1735 | /* ================= */ | |
1736 | ||
1737 | /* complete_cb | |
1738 | * unqueue first command buffer from queue, waking any sleepers | |
1739 | * must be called with cs->cmdlock held | |
1740 | * parameter: | |
1741 | * cs controller state structure | |
1742 | */ | |
1743 | static void complete_cb(struct cardstate *cs) | |
1744 | { | |
d48c7784 | 1745 | struct cmdbuf_t *cb = cs->cmdbuf; |
cf7776dc HL |
1746 | |
1747 | /* unqueue completed buffer */ | |
1748 | cs->cmdbytes -= cs->curlen; | |
1528b18f | 1749 | gig_dbg(DEBUG_OUTPUT, "write_command: sent %u bytes, %u left", |
784d5858 | 1750 | cs->curlen, cs->cmdbytes); |
7891adf1 TS |
1751 | if (cb->next != NULL) { |
1752 | cs->cmdbuf = cb->next; | |
cf7776dc HL |
1753 | cs->cmdbuf->prev = NULL; |
1754 | cs->curlen = cs->cmdbuf->len; | |
1755 | } else { | |
7891adf1 | 1756 | cs->cmdbuf = NULL; |
cf7776dc HL |
1757 | cs->lastcmdbuf = NULL; |
1758 | cs->curlen = 0; | |
1759 | } | |
1760 | ||
1761 | if (cb->wake_tasklet) | |
1762 | tasklet_schedule(cb->wake_tasklet); | |
1763 | ||
1764 | kfree(cb); | |
1765 | } | |
1766 | ||
cf7776dc HL |
1767 | /* write_command_callback |
1768 | * USB completion handler for AT command transmission | |
1769 | * called by the USB subsystem in interrupt context | |
1770 | * parameter: | |
1771 | * urb USB request block of completed request | |
1772 | * urb->context = controller state structure | |
1773 | */ | |
7d12e780 | 1774 | static void write_command_callback(struct urb *urb) |
cf7776dc | 1775 | { |
d48c7784 TS |
1776 | struct cardstate *cs = urb->context; |
1777 | struct bas_cardstate *ucs = cs->hw.bas; | |
dbd98231 | 1778 | int status = urb->status; |
cf7776dc | 1779 | unsigned long flags; |
cf7776dc | 1780 | |
73a88814 | 1781 | update_basstate(ucs, 0, BS_ATWRPEND); |
024fd299 | 1782 | wake_up(&ucs->waitqueue); |
73a88814 | 1783 | |
cf7776dc | 1784 | /* check status */ |
dbd98231 | 1785 | switch (status) { |
cf7776dc HL |
1786 | case 0: /* normal completion */ |
1787 | break; | |
73a88814 TS |
1788 | case -ENOENT: /* cancelled */ |
1789 | case -ECONNRESET: /* cancelled (async) */ | |
cf7776dc | 1790 | case -EINPROGRESS: /* pending */ |
73a88814 TS |
1791 | case -ENODEV: /* device removed */ |
1792 | case -ESHUTDOWN: /* device shut down */ | |
cf7776dc | 1793 | /* ignore silently */ |
784d5858 | 1794 | gig_dbg(DEBUG_USBREQ, "%s: %s", |
dbd98231 | 1795 | __func__, get_usb_statmsg(status)); |
cf7776dc HL |
1796 | return; |
1797 | default: /* any failure */ | |
1798 | if (++ucs->retry_cmd_out > BAS_RETRY) { | |
784d5858 TS |
1799 | dev_warn(cs->dev, |
1800 | "command write: %s, " | |
1801 | "giving up after %d retries\n", | |
dbd98231 | 1802 | get_usb_statmsg(status), |
784d5858 | 1803 | ucs->retry_cmd_out); |
cf7776dc HL |
1804 | break; |
1805 | } | |
9d4bee2b | 1806 | if (ucs->basstate & BS_SUSPEND) { |
024fd299 TS |
1807 | dev_warn(cs->dev, |
1808 | "command write: %s, " | |
1809 | "won't retry - suspend requested\n", | |
1810 | get_usb_statmsg(status)); | |
1811 | break; | |
1812 | } | |
cf7776dc | 1813 | if (cs->cmdbuf == NULL) { |
784d5858 TS |
1814 | dev_warn(cs->dev, |
1815 | "command write: %s, " | |
1816 | "cannot retry - cmdbuf gone\n", | |
dbd98231 | 1817 | get_usb_statmsg(status)); |
cf7776dc HL |
1818 | break; |
1819 | } | |
784d5858 | 1820 | dev_notice(cs->dev, "command write: %s, retry %d\n", |
dbd98231 | 1821 | get_usb_statmsg(status), ucs->retry_cmd_out); |
cf7776dc HL |
1822 | if (atwrite_submit(cs, cs->cmdbuf->buf, cs->cmdbuf->len) >= 0) |
1823 | /* resubmitted - bypass regular exit block */ | |
1824 | return; | |
1825 | /* command send failed, assume base still waiting */ | |
1826 | update_basstate(ucs, BS_ATREADY, 0); | |
1827 | } | |
1828 | ||
1829 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1830 | if (cs->cmdbuf != NULL) | |
1831 | complete_cb(cs); | |
1832 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1833 | } | |
1834 | ||
1835 | /* atrdy_timeout | |
1836 | * timeout routine for AT command transmission | |
1837 | * argument: | |
1838 | * controller state structure | |
1839 | */ | |
1840 | static void atrdy_timeout(unsigned long data) | |
1841 | { | |
1842 | struct cardstate *cs = (struct cardstate *) data; | |
d48c7784 | 1843 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc | 1844 | |
784d5858 | 1845 | dev_warn(cs->dev, "timeout waiting for HD_READY_SEND_ATDATA\n"); |
cf7776dc HL |
1846 | |
1847 | /* fake the missing signal - what else can I do? */ | |
1848 | update_basstate(ucs, BS_ATREADY, BS_ATTIMER); | |
1849 | start_cbsend(cs); | |
1850 | } | |
1851 | ||
1852 | /* atwrite_submit | |
1853 | * submit an HD_WRITE_ATMESSAGE command URB | |
1854 | * parameters: | |
1855 | * cs controller state structure | |
1856 | * buf buffer containing command to send | |
1857 | * len length of command to send | |
1858 | * return value: | |
1859 | * 0 on success | |
cf7776dc HL |
1860 | * -EBUSY if another request is pending |
1861 | * any URB submission error code | |
1862 | */ | |
1863 | static int atwrite_submit(struct cardstate *cs, unsigned char *buf, int len) | |
1864 | { | |
d48c7784 | 1865 | struct bas_cardstate *ucs = cs->hw.bas; |
73a88814 | 1866 | int rc; |
cf7776dc | 1867 | |
784d5858 | 1868 | gig_dbg(DEBUG_USBREQ, "-------> HD_WRITE_ATMESSAGE (%d)", len); |
cf7776dc | 1869 | |
73a88814 | 1870 | if (update_basstate(ucs, BS_ATWRPEND, 0) & BS_ATWRPEND) { |
784d5858 TS |
1871 | dev_err(cs->dev, |
1872 | "could not submit HD_WRITE_ATMESSAGE: URB busy\n"); | |
cf7776dc HL |
1873 | return -EBUSY; |
1874 | } | |
1875 | ||
1876 | ucs->dr_cmd_out.bRequestType = OUT_VENDOR_REQ; | |
1877 | ucs->dr_cmd_out.bRequest = HD_WRITE_ATMESSAGE; | |
1878 | ucs->dr_cmd_out.wValue = 0; | |
1879 | ucs->dr_cmd_out.wIndex = 0; | |
1880 | ucs->dr_cmd_out.wLength = cpu_to_le16(len); | |
1881 | usb_fill_control_urb(ucs->urb_cmd_out, ucs->udev, | |
1882 | usb_sndctrlpipe(ucs->udev, 0), | |
7891adf1 | 1883 | (unsigned char *) &ucs->dr_cmd_out, buf, len, |
cf7776dc | 1884 | write_command_callback, cs); |
54e6ecb2 | 1885 | rc = usb_submit_urb(ucs->urb_cmd_out, GFP_ATOMIC); |
73a88814 TS |
1886 | if (unlikely(rc)) { |
1887 | update_basstate(ucs, 0, BS_ATWRPEND); | |
784d5858 | 1888 | dev_err(cs->dev, "could not submit HD_WRITE_ATMESSAGE: %s\n", |
73a88814 TS |
1889 | get_usb_rcmsg(rc)); |
1890 | return rc; | |
cf7776dc HL |
1891 | } |
1892 | ||
73a88814 TS |
1893 | /* submitted successfully, start timeout if necessary */ |
1894 | if (!(update_basstate(ucs, BS_ATTIMER, BS_ATREADY) & BS_ATTIMER)) { | |
784d5858 TS |
1895 | gig_dbg(DEBUG_OUTPUT, "setting ATREADY timeout of %d/10 secs", |
1896 | ATRDY_TIMEOUT); | |
1d5a9edc | 1897 | mod_timer(&ucs->timer_atrdy, jiffies + ATRDY_TIMEOUT * HZ / 10); |
cf7776dc HL |
1898 | } |
1899 | return 0; | |
1900 | } | |
1901 | ||
1902 | /* start_cbsend | |
1903 | * start transmission of AT command queue if necessary | |
1904 | * parameter: | |
1905 | * cs controller state structure | |
1906 | * return value: | |
1907 | * 0 on success | |
1908 | * error code < 0 on error | |
1909 | */ | |
1910 | static int start_cbsend(struct cardstate *cs) | |
1911 | { | |
1912 | struct cmdbuf_t *cb; | |
d48c7784 | 1913 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc HL |
1914 | unsigned long flags; |
1915 | int rc; | |
1916 | int retval = 0; | |
1917 | ||
024fd299 | 1918 | /* check if suspend requested */ |
9d4bee2b | 1919 | if (ucs->basstate & BS_SUSPEND) { |
1528b18f | 1920 | gig_dbg(DEBUG_OUTPUT, "suspending"); |
024fd299 TS |
1921 | return -EHOSTUNREACH; |
1922 | } | |
1923 | ||
cf7776dc | 1924 | /* check if AT channel is open */ |
9d4bee2b | 1925 | if (!(ucs->basstate & BS_ATOPEN)) { |
1528b18f | 1926 | gig_dbg(DEBUG_OUTPUT, "AT channel not open"); |
cf7776dc HL |
1927 | rc = req_submit(cs->bcs, HD_OPEN_ATCHANNEL, 0, BAS_TIMEOUT); |
1928 | if (rc < 0) { | |
cf7776dc HL |
1929 | /* flush command queue */ |
1930 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1931 | while (cs->cmdbuf != NULL) | |
1932 | complete_cb(cs); | |
1933 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1934 | } | |
1935 | return rc; | |
1936 | } | |
1937 | ||
1938 | /* try to send first command in queue */ | |
1939 | spin_lock_irqsave(&cs->cmdlock, flags); | |
1940 | ||
9d4bee2b | 1941 | while ((cb = cs->cmdbuf) != NULL && (ucs->basstate & BS_ATREADY)) { |
cf7776dc HL |
1942 | ucs->retry_cmd_out = 0; |
1943 | rc = atwrite_submit(cs, cb->buf, cb->len); | |
1944 | if (unlikely(rc)) { | |
1945 | retval = rc; | |
1946 | complete_cb(cs); | |
1947 | } | |
1948 | } | |
1949 | ||
1950 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
1951 | return retval; | |
1952 | } | |
1953 | ||
1954 | /* gigaset_write_cmd | |
1955 | * This function is called by the device independent part of the driver | |
1956 | * to transmit an AT command string to the Gigaset device. | |
1957 | * It encapsulates the device specific method for transmission over the | |
1958 | * direct USB connection to the base. | |
1959 | * The command string is added to the queue of commands to send, and | |
1960 | * USB transmission is started if necessary. | |
1961 | * parameters: | |
1962 | * cs controller state structure | |
e3628dd1 | 1963 | * cb command buffer structure |
cf7776dc HL |
1964 | * return value: |
1965 | * number of bytes queued on success | |
1966 | * error code < 0 on error | |
1967 | */ | |
e3628dd1 | 1968 | static int gigaset_write_cmd(struct cardstate *cs, struct cmdbuf_t *cb) |
cf7776dc | 1969 | { |
cf7776dc | 1970 | unsigned long flags; |
39f07223 | 1971 | int rc; |
cf7776dc | 1972 | |
9d4bee2b | 1973 | gigaset_dbg_buffer(cs->mstate != MS_LOCKED ? |
475be4d8 | 1974 | DEBUG_TRANSCMD : DEBUG_LOCKCMD, |
e3628dd1 | 1975 | "CMD Transmit", cb->len, cb->buf); |
cf7776dc | 1976 | |
b5f581d5 TS |
1977 | /* translate "+++" escape sequence sent as a single separate command |
1978 | * into "close AT channel" command for error recovery | |
1979 | * The next command will reopen the AT channel automatically. | |
1980 | */ | |
e3628dd1 | 1981 | if (cb->len == 3 && !memcmp(cb->buf, "+++", 3)) { |
4cb5e42f TS |
1982 | /* If an HD_RECEIVEATDATA_ACK message remains unhandled |
1983 | * because of an error, the base never sends another one. | |
1984 | * The response channel is thus effectively blocked. | |
1985 | * Closing and reopening the AT channel does *not* clear | |
1986 | * this condition. | |
1987 | * As a stopgap measure, submit a zero-length AT read | |
1988 | * before closing the AT channel. This has the undocumented | |
1989 | * effect of triggering a new HD_RECEIVEATDATA_ACK message | |
1990 | * from the base if necessary. | |
1991 | * The subsequent AT channel close then discards any pending | |
1992 | * messages. | |
1993 | */ | |
1994 | spin_lock_irqsave(&cs->lock, flags); | |
1995 | if (!(cs->hw.bas->basstate & BS_ATRDPEND)) { | |
1996 | kfree(cs->hw.bas->rcvbuf); | |
1997 | cs->hw.bas->rcvbuf = NULL; | |
1998 | cs->hw.bas->rcvbuf_size = 0; | |
1999 | cs->hw.bas->retry_cmd_in = 0; | |
2000 | atread_submit(cs, 0); | |
2001 | } | |
2002 | spin_unlock_irqrestore(&cs->lock, flags); | |
2003 | ||
b5f581d5 | 2004 | rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, BAS_TIMEOUT); |
e3628dd1 TS |
2005 | if (cb->wake_tasklet) |
2006 | tasklet_schedule(cb->wake_tasklet); | |
8bcfbd0a DC |
2007 | if (!rc) |
2008 | rc = cb->len; | |
2009 | kfree(cb); | |
2010 | return rc; | |
cf7776dc HL |
2011 | } |
2012 | ||
cf7776dc HL |
2013 | spin_lock_irqsave(&cs->cmdlock, flags); |
2014 | cb->prev = cs->lastcmdbuf; | |
2015 | if (cs->lastcmdbuf) | |
2016 | cs->lastcmdbuf->next = cb; | |
2017 | else { | |
2018 | cs->cmdbuf = cb; | |
e3628dd1 | 2019 | cs->curlen = cb->len; |
cf7776dc | 2020 | } |
e3628dd1 | 2021 | cs->cmdbytes += cb->len; |
cf7776dc HL |
2022 | cs->lastcmdbuf = cb; |
2023 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
2024 | ||
73a88814 TS |
2025 | spin_lock_irqsave(&cs->lock, flags); |
2026 | if (unlikely(!cs->connected)) { | |
2027 | spin_unlock_irqrestore(&cs->lock, flags); | |
2028 | gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__); | |
39f07223 TS |
2029 | /* flush command queue */ |
2030 | spin_lock_irqsave(&cs->cmdlock, flags); | |
2031 | while (cs->cmdbuf != NULL) | |
2032 | complete_cb(cs); | |
2033 | spin_unlock_irqrestore(&cs->cmdlock, flags); | |
73a88814 TS |
2034 | return -ENODEV; |
2035 | } | |
39f07223 | 2036 | rc = start_cbsend(cs); |
73a88814 | 2037 | spin_unlock_irqrestore(&cs->lock, flags); |
e3628dd1 | 2038 | return rc < 0 ? rc : cb->len; |
cf7776dc HL |
2039 | } |
2040 | ||
2041 | /* gigaset_write_room | |
2042 | * tty_driver.write_room interface routine | |
917f5085 TS |
2043 | * return number of characters the driver will accept to be written via |
2044 | * gigaset_write_cmd | |
cf7776dc HL |
2045 | * parameter: |
2046 | * controller state structure | |
2047 | * return value: | |
2048 | * number of characters | |
2049 | */ | |
2050 | static int gigaset_write_room(struct cardstate *cs) | |
2051 | { | |
2052 | return IF_WRITEBUF; | |
2053 | } | |
2054 | ||
2055 | /* gigaset_chars_in_buffer | |
2056 | * tty_driver.chars_in_buffer interface routine | |
2057 | * return number of characters waiting to be sent | |
2058 | * parameter: | |
2059 | * controller state structure | |
2060 | * return value: | |
2061 | * number of characters | |
2062 | */ | |
2063 | static int gigaset_chars_in_buffer(struct cardstate *cs) | |
2064 | { | |
4d1ff582 | 2065 | return cs->cmdbytes; |
cf7776dc HL |
2066 | } |
2067 | ||
2068 | /* gigaset_brkchars | |
2069 | * implementation of ioctl(GIGASET_BRKCHARS) | |
2070 | * parameter: | |
2071 | * controller state structure | |
2072 | * return value: | |
2073 | * -EINVAL (unimplemented function) | |
2074 | */ | |
2075 | static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6]) | |
2076 | { | |
2077 | return -EINVAL; | |
2078 | } | |
2079 | ||
2080 | ||
2081 | /* Device Initialization/Shutdown */ | |
2082 | /* ============================== */ | |
2083 | ||
2084 | /* Free hardware dependent part of the B channel structure | |
2085 | * parameter: | |
2086 | * bcs B channel structure | |
cf7776dc | 2087 | */ |
81fa7b82 | 2088 | static void gigaset_freebcshw(struct bc_state *bcs) |
cf7776dc | 2089 | { |
73a88814 TS |
2090 | struct bas_bc_state *ubc = bcs->hw.bas; |
2091 | int i; | |
2092 | ||
2093 | if (!ubc) | |
81fa7b82 | 2094 | return; |
cf7776dc | 2095 | |
73a88814 | 2096 | /* kill URBs and tasklets before freeing - better safe than sorry */ |
9d4bee2b | 2097 | ubc->running = 0; |
bb7196d2 | 2098 | gig_dbg(DEBUG_INIT, "%s: killing isoc URBs", __func__); |
39f07223 TS |
2099 | for (i = 0; i < BAS_OUTURBS; ++i) { |
2100 | usb_kill_urb(ubc->isoouturbs[i].urb); | |
2101 | usb_free_urb(ubc->isoouturbs[i].urb); | |
2102 | } | |
2103 | for (i = 0; i < BAS_INURBS; ++i) { | |
2104 | usb_kill_urb(ubc->isoinurbs[i]); | |
2105 | usb_free_urb(ubc->isoinurbs[i]); | |
2106 | } | |
73a88814 TS |
2107 | tasklet_kill(&ubc->sent_tasklet); |
2108 | tasklet_kill(&ubc->rcvd_tasklet); | |
2109 | kfree(ubc->isooutbuf); | |
2110 | kfree(ubc); | |
cf7776dc | 2111 | bcs->hw.bas = NULL; |
cf7776dc HL |
2112 | } |
2113 | ||
2114 | /* Initialize hardware dependent part of the B channel structure | |
2115 | * parameter: | |
2116 | * bcs B channel structure | |
2117 | * return value: | |
81fa7b82 | 2118 | * 0 on success, error code < 0 on failure |
cf7776dc HL |
2119 | */ |
2120 | static int gigaset_initbcshw(struct bc_state *bcs) | |
2121 | { | |
2122 | int i; | |
2123 | struct bas_bc_state *ubc; | |
2124 | ||
2125 | bcs->hw.bas = ubc = kmalloc(sizeof(struct bas_bc_state), GFP_KERNEL); | |
2126 | if (!ubc) { | |
c8770dca | 2127 | pr_err("out of memory\n"); |
81fa7b82 | 2128 | return -ENOMEM; |
cf7776dc HL |
2129 | } |
2130 | ||
9d4bee2b | 2131 | ubc->running = 0; |
cf7776dc HL |
2132 | atomic_set(&ubc->corrbytes, 0); |
2133 | spin_lock_init(&ubc->isooutlock); | |
2134 | for (i = 0; i < BAS_OUTURBS; ++i) { | |
2135 | ubc->isoouturbs[i].urb = NULL; | |
2136 | ubc->isoouturbs[i].bcs = bcs; | |
2137 | } | |
2138 | ubc->isooutdone = ubc->isooutfree = ubc->isooutovfl = NULL; | |
2139 | ubc->numsub = 0; | |
7891adf1 TS |
2140 | ubc->isooutbuf = kmalloc(sizeof(struct isowbuf_t), GFP_KERNEL); |
2141 | if (!ubc->isooutbuf) { | |
c8770dca | 2142 | pr_err("out of memory\n"); |
cf7776dc HL |
2143 | kfree(ubc); |
2144 | bcs->hw.bas = NULL; | |
81fa7b82 | 2145 | return -ENOMEM; |
cf7776dc HL |
2146 | } |
2147 | tasklet_init(&ubc->sent_tasklet, | |
5452fee2 | 2148 | write_iso_tasklet, (unsigned long) bcs); |
cf7776dc HL |
2149 | |
2150 | spin_lock_init(&ubc->isoinlock); | |
2151 | for (i = 0; i < BAS_INURBS; ++i) | |
2152 | ubc->isoinurbs[i] = NULL; | |
2153 | ubc->isoindone = NULL; | |
2154 | ubc->loststatus = -EINPROGRESS; | |
2155 | ubc->isoinlost = 0; | |
2156 | ubc->seqlen = 0; | |
2157 | ubc->inbyte = 0; | |
2158 | ubc->inbits = 0; | |
2159 | ubc->goodbytes = 0; | |
2160 | ubc->alignerrs = 0; | |
2161 | ubc->fcserrs = 0; | |
2162 | ubc->frameerrs = 0; | |
2163 | ubc->giants = 0; | |
2164 | ubc->runts = 0; | |
2165 | ubc->aborts = 0; | |
2166 | ubc->shared0s = 0; | |
2167 | ubc->stolen0s = 0; | |
2168 | tasklet_init(&ubc->rcvd_tasklet, | |
5452fee2 | 2169 | read_iso_tasklet, (unsigned long) bcs); |
81fa7b82 | 2170 | return 0; |
cf7776dc HL |
2171 | } |
2172 | ||
2173 | static void gigaset_reinitbcshw(struct bc_state *bcs) | |
2174 | { | |
2175 | struct bas_bc_state *ubc = bcs->hw.bas; | |
2176 | ||
9d4bee2b | 2177 | bcs->hw.bas->running = 0; |
cf7776dc HL |
2178 | atomic_set(&bcs->hw.bas->corrbytes, 0); |
2179 | bcs->hw.bas->numsub = 0; | |
2180 | spin_lock_init(&ubc->isooutlock); | |
2181 | spin_lock_init(&ubc->isoinlock); | |
2182 | ubc->loststatus = -EINPROGRESS; | |
2183 | } | |
2184 | ||
2185 | static void gigaset_freecshw(struct cardstate *cs) | |
2186 | { | |
73a88814 | 2187 | /* timers, URBs and rcvbuf are disposed of in disconnect */ |
170ebf85 | 2188 | kfree(cs->hw.bas->int_in_buf); |
cf7776dc | 2189 | kfree(cs->hw.bas); |
73a88814 | 2190 | cs->hw.bas = NULL; |
cf7776dc HL |
2191 | } |
2192 | ||
81fa7b82 TS |
2193 | /* Initialize hardware dependent part of the cardstate structure |
2194 | * parameter: | |
2195 | * cs cardstate structure | |
2196 | * return value: | |
2197 | * 0 on success, error code < 0 on failure | |
2198 | */ | |
cf7776dc HL |
2199 | static int gigaset_initcshw(struct cardstate *cs) |
2200 | { | |
2201 | struct bas_cardstate *ucs; | |
2202 | ||
2203 | cs->hw.bas = ucs = kmalloc(sizeof *ucs, GFP_KERNEL); | |
c8770dca TS |
2204 | if (!ucs) { |
2205 | pr_err("out of memory\n"); | |
81fa7b82 | 2206 | return -ENOMEM; |
c8770dca | 2207 | } |
170ebf85 TS |
2208 | ucs->int_in_buf = kmalloc(IP_MSGSIZE, GFP_KERNEL); |
2209 | if (!ucs->int_in_buf) { | |
2210 | kfree(ucs); | |
2211 | pr_err("out of memory\n"); | |
81fa7b82 | 2212 | return -ENOMEM; |
170ebf85 | 2213 | } |
cf7776dc HL |
2214 | |
2215 | ucs->urb_cmd_in = NULL; | |
2216 | ucs->urb_cmd_out = NULL; | |
2217 | ucs->rcvbuf = NULL; | |
2218 | ucs->rcvbuf_size = 0; | |
2219 | ||
2220 | spin_lock_init(&ucs->lock); | |
2221 | ucs->pending = 0; | |
2222 | ||
9d4bee2b | 2223 | ucs->basstate = 0; |
1d5a9edc TS |
2224 | setup_timer(&ucs->timer_ctrl, req_timeout, (unsigned long) cs); |
2225 | setup_timer(&ucs->timer_atrdy, atrdy_timeout, (unsigned long) cs); | |
2226 | setup_timer(&ucs->timer_cmd_in, cmd_in_timeout, (unsigned long) cs); | |
c9c0c304 | 2227 | setup_timer(&ucs->timer_int_in, int_in_resubmit, (unsigned long) cs); |
024fd299 | 2228 | init_waitqueue_head(&ucs->waitqueue); |
c9c0c304 | 2229 | INIT_WORK(&ucs->int_in_wq, int_in_work); |
cf7776dc | 2230 | |
81fa7b82 | 2231 | return 0; |
cf7776dc HL |
2232 | } |
2233 | ||
2234 | /* freeurbs | |
2235 | * unlink and deallocate all URBs unconditionally | |
2236 | * caller must make sure that no commands are still in progress | |
2237 | * parameter: | |
2238 | * cs controller state structure | |
2239 | */ | |
2240 | static void freeurbs(struct cardstate *cs) | |
2241 | { | |
d48c7784 | 2242 | struct bas_cardstate *ucs = cs->hw.bas; |
cf7776dc HL |
2243 | struct bas_bc_state *ubc; |
2244 | int i, j; | |
2245 | ||
39f07223 | 2246 | gig_dbg(DEBUG_INIT, "%s: killing URBs", __func__); |
c652cbd8 | 2247 | for (j = 0; j < BAS_CHANNELS; ++j) { |
cf7776dc | 2248 | ubc = cs->bcs[j].hw.bas; |
39f07223 TS |
2249 | for (i = 0; i < BAS_OUTURBS; ++i) { |
2250 | usb_kill_urb(ubc->isoouturbs[i].urb); | |
2251 | usb_free_urb(ubc->isoouturbs[i].urb); | |
2252 | ubc->isoouturbs[i].urb = NULL; | |
2253 | } | |
2254 | for (i = 0; i < BAS_INURBS; ++i) { | |
2255 | usb_kill_urb(ubc->isoinurbs[i]); | |
2256 | usb_free_urb(ubc->isoinurbs[i]); | |
2257 | ubc->isoinurbs[i] = NULL; | |
2258 | } | |
cf7776dc | 2259 | } |
39f07223 TS |
2260 | usb_kill_urb(ucs->urb_int_in); |
2261 | usb_free_urb(ucs->urb_int_in); | |
2262 | ucs->urb_int_in = NULL; | |
2263 | usb_kill_urb(ucs->urb_cmd_out); | |
2264 | usb_free_urb(ucs->urb_cmd_out); | |
2265 | ucs->urb_cmd_out = NULL; | |
2266 | usb_kill_urb(ucs->urb_cmd_in); | |
2267 | usb_free_urb(ucs->urb_cmd_in); | |
2268 | ucs->urb_cmd_in = NULL; | |
2269 | usb_kill_urb(ucs->urb_ctrl); | |
2270 | usb_free_urb(ucs->urb_ctrl); | |
2271 | ucs->urb_ctrl = NULL; | |
cf7776dc HL |
2272 | } |
2273 | ||
2274 | /* gigaset_probe | |
2275 | * This function is called when a new USB device is connected. | |
2276 | * It checks whether the new device is handled by this driver. | |
2277 | */ | |
2278 | static int gigaset_probe(struct usb_interface *interface, | |
2279 | const struct usb_device_id *id) | |
2280 | { | |
2281 | struct usb_host_interface *hostif; | |
2282 | struct usb_device *udev = interface_to_usbdev(interface); | |
2283 | struct cardstate *cs = NULL; | |
2284 | struct bas_cardstate *ucs = NULL; | |
2285 | struct bas_bc_state *ubc; | |
2286 | struct usb_endpoint_descriptor *endpoint; | |
2287 | int i, j; | |
73a88814 | 2288 | int rc; |
cf7776dc | 2289 | |
1528b18f | 2290 | gig_dbg(DEBUG_INIT, |
784d5858 TS |
2291 | "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)", |
2292 | __func__, le16_to_cpu(udev->descriptor.idVendor), | |
2293 | le16_to_cpu(udev->descriptor.idProduct)); | |
cf7776dc | 2294 | |
cf7776dc HL |
2295 | /* set required alternate setting */ |
2296 | hostif = interface->cur_altsetting; | |
2297 | if (hostif->desc.bAlternateSetting != 3) { | |
1528b18f | 2298 | gig_dbg(DEBUG_INIT, |
784d5858 TS |
2299 | "%s: wrong alternate setting %d - trying to switch", |
2300 | __func__, hostif->desc.bAlternateSetting); | |
7891adf1 TS |
2301 | if (usb_set_interface(udev, hostif->desc.bInterfaceNumber, 3) |
2302 | < 0) { | |
784d5858 TS |
2303 | dev_warn(&udev->dev, "usb_set_interface failed, " |
2304 | "device %d interface %d altsetting %d\n", | |
2305 | udev->devnum, hostif->desc.bInterfaceNumber, | |
2306 | hostif->desc.bAlternateSetting); | |
cf7776dc HL |
2307 | return -ENODEV; |
2308 | } | |
2309 | hostif = interface->cur_altsetting; | |
2310 | } | |
2311 | ||
2312 | /* Reject application specific interfaces | |
2313 | */ | |
2314 | if (hostif->desc.bInterfaceClass != 255) { | |
784d5858 TS |
2315 | dev_warn(&udev->dev, "%s: bInterfaceClass == %d\n", |
2316 | __func__, hostif->desc.bInterfaceClass); | |
cf7776dc HL |
2317 | return -ENODEV; |
2318 | } | |
2319 | ||
784d5858 TS |
2320 | dev_info(&udev->dev, |
2321 | "%s: Device matched (Vendor: 0x%x, Product: 0x%x)\n", | |
2322 | __func__, le16_to_cpu(udev->descriptor.idVendor), | |
2323 | le16_to_cpu(udev->descriptor.idProduct)); | |
cf7776dc | 2324 | |
b595076a | 2325 | /* allocate memory for our device state and initialize it */ |
e468c048 TS |
2326 | cs = gigaset_initcs(driver, BAS_CHANNELS, 0, 0, cidmode, |
2327 | GIGASET_MODULENAME); | |
2328 | if (!cs) | |
cf7776dc | 2329 | return -ENODEV; |
cf7776dc | 2330 | ucs = cs->hw.bas; |
784d5858 TS |
2331 | |
2332 | /* save off device structure ptrs for later use */ | |
2333 | usb_get_dev(udev); | |
cf7776dc HL |
2334 | ucs->udev = udev; |
2335 | ucs->interface = interface; | |
b1d47464 | 2336 | cs->dev = &interface->dev; |
cf7776dc HL |
2337 | |
2338 | /* allocate URBs: | |
2339 | * - one for the interrupt pipe | |
2340 | * - three for the different uses of the default control pipe | |
2341 | * - three for each isochronous pipe | |
2342 | */ | |
e94b1766 CL |
2343 | if (!(ucs->urb_int_in = usb_alloc_urb(0, GFP_KERNEL)) || |
2344 | !(ucs->urb_cmd_in = usb_alloc_urb(0, GFP_KERNEL)) || | |
2345 | !(ucs->urb_cmd_out = usb_alloc_urb(0, GFP_KERNEL)) || | |
2346 | !(ucs->urb_ctrl = usb_alloc_urb(0, GFP_KERNEL))) | |
73a88814 | 2347 | goto allocerr; |
cf7776dc | 2348 | |
c652cbd8 | 2349 | for (j = 0; j < BAS_CHANNELS; ++j) { |
cf7776dc | 2350 | ubc = cs->bcs[j].hw.bas; |
73a88814 TS |
2351 | for (i = 0; i < BAS_OUTURBS; ++i) |
2352 | if (!(ubc->isoouturbs[i].urb = | |
e94b1766 | 2353 | usb_alloc_urb(BAS_NUMFRAMES, GFP_KERNEL))) |
73a88814 TS |
2354 | goto allocerr; |
2355 | for (i = 0; i < BAS_INURBS; ++i) | |
2356 | if (!(ubc->isoinurbs[i] = | |
e94b1766 | 2357 | usb_alloc_urb(BAS_NUMFRAMES, GFP_KERNEL))) |
73a88814 | 2358 | goto allocerr; |
cf7776dc HL |
2359 | } |
2360 | ||
2361 | ucs->rcvbuf = NULL; | |
2362 | ucs->rcvbuf_size = 0; | |
2363 | ||
2364 | /* Fill the interrupt urb and send it to the core */ | |
2365 | endpoint = &hostif->endpoint[0].desc; | |
2366 | usb_fill_int_urb(ucs->urb_int_in, udev, | |
784d5858 | 2367 | usb_rcvintpipe(udev, |
14462b6e | 2368 | usb_endpoint_num(endpoint)), |
170ebf85 | 2369 | ucs->int_in_buf, IP_MSGSIZE, read_int_callback, cs, |
784d5858 | 2370 | endpoint->bInterval); |
7891adf1 TS |
2371 | rc = usb_submit_urb(ucs->urb_int_in, GFP_KERNEL); |
2372 | if (rc != 0) { | |
784d5858 | 2373 | dev_err(cs->dev, "could not submit interrupt URB: %s\n", |
73a88814 | 2374 | get_usb_rcmsg(rc)); |
cf7776dc HL |
2375 | goto error; |
2376 | } | |
c9c0c304 | 2377 | ucs->retry_int_in = 0; |
cf7776dc HL |
2378 | |
2379 | /* tell the device that the driver is ready */ | |
7891adf1 TS |
2380 | rc = req_submit(cs->bcs, HD_DEVICE_INIT_ACK, 0, 0); |
2381 | if (rc != 0) | |
cf7776dc HL |
2382 | goto error; |
2383 | ||
2384 | /* tell common part that the device is ready */ | |
2385 | if (startmode == SM_LOCKED) | |
9d4bee2b | 2386 | cs->mstate = MS_LOCKED; |
cf7776dc HL |
2387 | |
2388 | /* save address of controller structure */ | |
2389 | usb_set_intfdata(interface, cs); | |
2390 | ||
81fa7b82 TS |
2391 | rc = gigaset_start(cs); |
2392 | if (rc < 0) | |
b1d47464 TS |
2393 | goto error; |
2394 | ||
cf7776dc HL |
2395 | return 0; |
2396 | ||
73a88814 TS |
2397 | allocerr: |
2398 | dev_err(cs->dev, "could not allocate URBs\n"); | |
81fa7b82 | 2399 | rc = -ENOMEM; |
cf7776dc HL |
2400 | error: |
2401 | freeurbs(cs); | |
69049cc8 | 2402 | usb_set_intfdata(interface, NULL); |
86b7987d | 2403 | usb_put_dev(udev); |
e468c048 | 2404 | gigaset_freecs(cs); |
81fa7b82 | 2405 | return rc; |
cf7776dc HL |
2406 | } |
2407 | ||
2408 | /* gigaset_disconnect | |
2409 | * This function is called when the Gigaset base is unplugged. | |
2410 | */ | |
2411 | static void gigaset_disconnect(struct usb_interface *interface) | |
2412 | { | |
2413 | struct cardstate *cs; | |
2414 | struct bas_cardstate *ucs; | |
73a88814 | 2415 | int j; |
cf7776dc | 2416 | |
cf7776dc | 2417 | cs = usb_get_intfdata(interface); |
cf7776dc | 2418 | |
cf7776dc | 2419 | ucs = cs->hw.bas; |
cf7776dc | 2420 | |
b1d47464 | 2421 | dev_info(cs->dev, "disconnecting Gigaset base\n"); |
73a88814 TS |
2422 | |
2423 | /* mark base as not ready, all channels disconnected */ | |
9d4bee2b | 2424 | ucs->basstate = 0; |
73a88814 TS |
2425 | |
2426 | /* tell LL all channels are down */ | |
c652cbd8 | 2427 | for (j = 0; j < BAS_CHANNELS; ++j) |
73a88814 TS |
2428 | gigaset_bchannel_down(cs->bcs + j); |
2429 | ||
2430 | /* stop driver (common part) */ | |
cf7776dc | 2431 | gigaset_stop(cs); |
73a88814 | 2432 | |
c9c0c304 | 2433 | /* stop delayed work and URBs, free ressources */ |
73a88814 TS |
2434 | del_timer_sync(&ucs->timer_ctrl); |
2435 | del_timer_sync(&ucs->timer_atrdy); | |
2436 | del_timer_sync(&ucs->timer_cmd_in); | |
c9c0c304 TS |
2437 | del_timer_sync(&ucs->timer_int_in); |
2438 | cancel_work_sync(&ucs->int_in_wq); | |
cf7776dc | 2439 | freeurbs(cs); |
b1d47464 | 2440 | usb_set_intfdata(interface, NULL); |
cf7776dc HL |
2441 | kfree(ucs->rcvbuf); |
2442 | ucs->rcvbuf = NULL; | |
2443 | ucs->rcvbuf_size = 0; | |
b1d47464 TS |
2444 | usb_put_dev(ucs->udev); |
2445 | ucs->interface = NULL; | |
2446 | ucs->udev = NULL; | |
2447 | cs->dev = NULL; | |
e468c048 | 2448 | gigaset_freecs(cs); |
cf7776dc HL |
2449 | } |
2450 | ||
024fd299 | 2451 | /* gigaset_suspend |
c6fdd8e5 TS |
2452 | * This function is called before the USB connection is suspended |
2453 | * or before the USB device is reset. | |
2454 | * In the latter case, message == PMSG_ON. | |
024fd299 TS |
2455 | */ |
2456 | static int gigaset_suspend(struct usb_interface *intf, pm_message_t message) | |
2457 | { | |
2458 | struct cardstate *cs = usb_get_intfdata(intf); | |
2459 | struct bas_cardstate *ucs = cs->hw.bas; | |
024fd299 TS |
2460 | int rc; |
2461 | ||
2462 | /* set suspend flag; this stops AT command/response traffic */ | |
2463 | if (update_basstate(ucs, BS_SUSPEND, 0) & BS_SUSPEND) { | |
2464 | gig_dbg(DEBUG_SUSPEND, "already suspended"); | |
2465 | return 0; | |
2466 | } | |
2467 | ||
2468 | /* wait a bit for blocking conditions to go away */ | |
2469 | rc = wait_event_timeout(ucs->waitqueue, | |
475be4d8 JP |
2470 | !(ucs->basstate & |
2471 | (BS_B1OPEN | BS_B2OPEN | BS_ATRDPEND | BS_ATWRPEND)), | |
2472 | BAS_TIMEOUT * HZ / 10); | |
024fd299 TS |
2473 | gig_dbg(DEBUG_SUSPEND, "wait_event_timeout() -> %d", rc); |
2474 | ||
2475 | /* check for conditions preventing suspend */ | |
475be4d8 | 2476 | if (ucs->basstate & (BS_B1OPEN | BS_B2OPEN | BS_ATRDPEND | BS_ATWRPEND)) { |
024fd299 | 2477 | dev_warn(cs->dev, "cannot suspend:\n"); |
9d4bee2b | 2478 | if (ucs->basstate & BS_B1OPEN) |
024fd299 | 2479 | dev_warn(cs->dev, " B channel 1 open\n"); |
9d4bee2b | 2480 | if (ucs->basstate & BS_B2OPEN) |
024fd299 | 2481 | dev_warn(cs->dev, " B channel 2 open\n"); |
9d4bee2b | 2482 | if (ucs->basstate & BS_ATRDPEND) |
024fd299 | 2483 | dev_warn(cs->dev, " receiving AT reply\n"); |
9d4bee2b | 2484 | if (ucs->basstate & BS_ATWRPEND) |
024fd299 TS |
2485 | dev_warn(cs->dev, " sending AT command\n"); |
2486 | update_basstate(ucs, 0, BS_SUSPEND); | |
2487 | return -EBUSY; | |
2488 | } | |
2489 | ||
2490 | /* close AT channel if open */ | |
9d4bee2b | 2491 | if (ucs->basstate & BS_ATOPEN) { |
024fd299 TS |
2492 | gig_dbg(DEBUG_SUSPEND, "closing AT channel"); |
2493 | rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, 0); | |
2494 | if (rc) { | |
2495 | update_basstate(ucs, 0, BS_SUSPEND); | |
2496 | return rc; | |
2497 | } | |
2498 | wait_event_timeout(ucs->waitqueue, !ucs->pending, | |
475be4d8 | 2499 | BAS_TIMEOUT * HZ / 10); |
024fd299 TS |
2500 | /* in case of timeout, proceed anyway */ |
2501 | } | |
2502 | ||
c9c0c304 | 2503 | /* kill all URBs and delayed work that might still be pending */ |
024fd299 TS |
2504 | usb_kill_urb(ucs->urb_ctrl); |
2505 | usb_kill_urb(ucs->urb_int_in); | |
2506 | del_timer_sync(&ucs->timer_ctrl); | |
1d5a9edc TS |
2507 | del_timer_sync(&ucs->timer_atrdy); |
2508 | del_timer_sync(&ucs->timer_cmd_in); | |
c9c0c304 | 2509 | del_timer_sync(&ucs->timer_int_in); |
c6fdd8e5 TS |
2510 | |
2511 | /* don't try to cancel int_in_wq from within reset as it | |
2512 | * might be the one requesting the reset | |
2513 | */ | |
2514 | if (message.event != PM_EVENT_ON) | |
2515 | cancel_work_sync(&ucs->int_in_wq); | |
024fd299 TS |
2516 | |
2517 | gig_dbg(DEBUG_SUSPEND, "suspend complete"); | |
2518 | return 0; | |
2519 | } | |
2520 | ||
2521 | /* gigaset_resume | |
2522 | * This function is called after the USB connection has been resumed. | |
2523 | */ | |
2524 | static int gigaset_resume(struct usb_interface *intf) | |
2525 | { | |
2526 | struct cardstate *cs = usb_get_intfdata(intf); | |
2527 | struct bas_cardstate *ucs = cs->hw.bas; | |
2528 | int rc; | |
2529 | ||
2530 | /* resubmit interrupt URB for spontaneous messages from base */ | |
2531 | rc = usb_submit_urb(ucs->urb_int_in, GFP_KERNEL); | |
2532 | if (rc) { | |
2533 | dev_err(cs->dev, "could not resubmit interrupt URB: %s\n", | |
2534 | get_usb_rcmsg(rc)); | |
2535 | return rc; | |
2536 | } | |
c9c0c304 | 2537 | ucs->retry_int_in = 0; |
024fd299 TS |
2538 | |
2539 | /* clear suspend flag to reallow activity */ | |
2540 | update_basstate(ucs, 0, BS_SUSPEND); | |
2541 | ||
2542 | gig_dbg(DEBUG_SUSPEND, "resume complete"); | |
2543 | return 0; | |
2544 | } | |
2545 | ||
2546 | /* gigaset_pre_reset | |
2547 | * This function is called before the USB connection is reset. | |
2548 | */ | |
2549 | static int gigaset_pre_reset(struct usb_interface *intf) | |
2550 | { | |
2551 | /* handle just like suspend */ | |
2552 | return gigaset_suspend(intf, PMSG_ON); | |
2553 | } | |
2554 | ||
2555 | /* gigaset_post_reset | |
2556 | * This function is called after the USB connection has been reset. | |
2557 | */ | |
2558 | static int gigaset_post_reset(struct usb_interface *intf) | |
2559 | { | |
2560 | /* FIXME: send HD_DEVICE_INIT_ACK? */ | |
2561 | ||
2562 | /* resume operations */ | |
2563 | return gigaset_resume(intf); | |
2564 | } | |
2565 | ||
2566 | ||
35dc8457 | 2567 | static const struct gigaset_ops gigops = { |
cf7776dc HL |
2568 | gigaset_write_cmd, |
2569 | gigaset_write_room, | |
2570 | gigaset_chars_in_buffer, | |
2571 | gigaset_brkchars, | |
2572 | gigaset_init_bchannel, | |
2573 | gigaset_close_bchannel, | |
2574 | gigaset_initbcshw, | |
2575 | gigaset_freebcshw, | |
2576 | gigaset_reinitbcshw, | |
2577 | gigaset_initcshw, | |
2578 | gigaset_freecshw, | |
2579 | gigaset_set_modem_ctrl, | |
2580 | gigaset_baud_rate, | |
2581 | gigaset_set_line_ctrl, | |
2582 | gigaset_isoc_send_skb, | |
2583 | gigaset_isoc_input, | |
2584 | }; | |
2585 | ||
2586 | /* bas_gigaset_init | |
2587 | * This function is called after the kernel module is loaded. | |
2588 | */ | |
2589 | static int __init bas_gigaset_init(void) | |
2590 | { | |
2591 | int result; | |
2592 | ||
b595076a | 2593 | /* allocate memory for our driver state and initialize it */ |
7891adf1 TS |
2594 | driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS, |
2595 | GIGASET_MODULENAME, GIGASET_DEVNAME, | |
2596 | &gigops, THIS_MODULE); | |
2597 | if (driver == NULL) | |
cf7776dc HL |
2598 | goto error; |
2599 | ||
cf7776dc HL |
2600 | /* register this driver with the USB subsystem */ |
2601 | result = usb_register(&gigaset_usb_driver); | |
2602 | if (result < 0) { | |
c8770dca | 2603 | pr_err("error %d registering USB driver\n", -result); |
cf7776dc HL |
2604 | goto error; |
2605 | } | |
2606 | ||
c8770dca | 2607 | pr_info(DRIVER_DESC "\n"); |
cf7776dc HL |
2608 | return 0; |
2609 | ||
e468c048 | 2610 | error: |
cf7776dc HL |
2611 | if (driver) |
2612 | gigaset_freedriver(driver); | |
2613 | driver = NULL; | |
2614 | return -1; | |
2615 | } | |
2616 | ||
2617 | /* bas_gigaset_exit | |
2618 | * This function is called before the kernel module is unloaded. | |
2619 | */ | |
2620 | static void __exit bas_gigaset_exit(void) | |
2621 | { | |
e468c048 TS |
2622 | struct bas_cardstate *ucs; |
2623 | int i; | |
73a88814 | 2624 | |
cf7776dc | 2625 | gigaset_blockdriver(driver); /* => probe will fail |
784d5858 TS |
2626 | * => no gigaset_start any more |
2627 | */ | |
cf7776dc | 2628 | |
e468c048 TS |
2629 | /* stop all connected devices */ |
2630 | for (i = 0; i < driver->minors; i++) { | |
2631 | if (gigaset_shutdown(driver->cs + i) < 0) | |
2632 | continue; /* no device */ | |
2633 | /* from now on, no isdn callback should be possible */ | |
2634 | ||
2635 | /* close all still open channels */ | |
2636 | ucs = driver->cs[i].hw.bas; | |
2637 | if (ucs->basstate & BS_B1OPEN) { | |
2638 | gig_dbg(DEBUG_INIT, "closing B1 channel"); | |
2639 | usb_control_msg(ucs->udev, | |
2640 | usb_sndctrlpipe(ucs->udev, 0), | |
2641 | HD_CLOSE_B1CHANNEL, OUT_VENDOR_REQ, | |
2642 | 0, 0, NULL, 0, BAS_TIMEOUT); | |
2643 | } | |
2644 | if (ucs->basstate & BS_B2OPEN) { | |
2645 | gig_dbg(DEBUG_INIT, "closing B2 channel"); | |
2646 | usb_control_msg(ucs->udev, | |
2647 | usb_sndctrlpipe(ucs->udev, 0), | |
2648 | HD_CLOSE_B2CHANNEL, OUT_VENDOR_REQ, | |
2649 | 0, 0, NULL, 0, BAS_TIMEOUT); | |
2650 | } | |
2651 | if (ucs->basstate & BS_ATOPEN) { | |
2652 | gig_dbg(DEBUG_INIT, "closing AT channel"); | |
2653 | usb_control_msg(ucs->udev, | |
2654 | usb_sndctrlpipe(ucs->udev, 0), | |
2655 | HD_CLOSE_ATCHANNEL, OUT_VENDOR_REQ, | |
2656 | 0, 0, NULL, 0, BAS_TIMEOUT); | |
2657 | } | |
2658 | ucs->basstate = 0; | |
cf7776dc HL |
2659 | } |
2660 | ||
2661 | /* deregister this driver with the USB subsystem */ | |
2662 | usb_deregister(&gigaset_usb_driver); | |
2663 | /* this will call the disconnect-callback */ | |
2664 | /* from now on, no disconnect/probe callback should be running */ | |
2665 | ||
cf7776dc HL |
2666 | gigaset_freedriver(driver); |
2667 | driver = NULL; | |
2668 | } | |
2669 | ||
2670 | ||
2671 | module_init(bas_gigaset_init); | |
2672 | module_exit(bas_gigaset_exit); | |
2673 | ||
2674 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
2675 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2676 | MODULE_LICENSE("GPL"); |