Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 1 | /* |
| 2 | * USB driver for Gigaset 307x base via direct USB connection. |
| 3 | * |
| 4 | * Copyright (c) 2001 by Hansjoerg Lipp <hjlipp@web.de>, |
| 5 | * Tilman Schmidt <tilman@imap.cc>, |
| 6 | * Stefan Eilers <Eilers.Stefan@epost.de>. |
| 7 | * |
| 8 | * Based on usb-gigaset.c. |
| 9 | * |
| 10 | * ===================================================================== |
| 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License as |
| 13 | * published by the Free Software Foundation; either version 2 of |
| 14 | * the License, or (at your option) any later version. |
| 15 | * ===================================================================== |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 16 | */ |
| 17 | |
| 18 | #include "gigaset.h" |
| 19 | |
| 20 | #include <linux/errno.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/slab.h> |
| 23 | #include <linux/timer.h> |
| 24 | #include <linux/usb.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/moduleparam.h> |
| 27 | |
| 28 | /* Version Information */ |
| 29 | #define DRIVER_AUTHOR "Tilman Schmidt <tilman@imap.cc>, Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers <Eilers.Stefan@epost.de>" |
| 30 | #define DRIVER_DESC "USB Driver for Gigaset 307x" |
| 31 | |
| 32 | |
| 33 | /* Module parameters */ |
| 34 | |
| 35 | static int startmode = SM_ISDN; |
| 36 | static int cidmode = 1; |
| 37 | |
| 38 | module_param(startmode, int, S_IRUGO); |
| 39 | module_param(cidmode, int, S_IRUGO); |
| 40 | MODULE_PARM_DESC(startmode, "start in isdn4linux mode"); |
| 41 | MODULE_PARM_DESC(cidmode, "Call-ID mode"); |
| 42 | |
| 43 | #define GIGASET_MINORS 1 |
| 44 | #define GIGASET_MINOR 16 |
| 45 | #define GIGASET_MODULENAME "bas_gigaset" |
| 46 | #define GIGASET_DEVFSNAME "gig/bas/" |
| 47 | #define GIGASET_DEVNAME "ttyGB" |
| 48 | |
| 49 | #define IF_WRITEBUF 256 //FIXME |
| 50 | |
| 51 | /* Values for the Gigaset 307x */ |
| 52 | #define USB_GIGA_VENDOR_ID 0x0681 |
| 53 | #define USB_GIGA_PRODUCT_ID 0x0001 |
| 54 | #define USB_4175_PRODUCT_ID 0x0002 |
| 55 | #define USB_SX303_PRODUCT_ID 0x0021 |
| 56 | #define USB_SX353_PRODUCT_ID 0x0022 |
| 57 | |
| 58 | /* table of devices that work with this driver */ |
| 59 | static struct usb_device_id gigaset_table [] = { |
| 60 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_GIGA_PRODUCT_ID) }, |
| 61 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_4175_PRODUCT_ID) }, |
| 62 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX303_PRODUCT_ID) }, |
| 63 | { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX353_PRODUCT_ID) }, |
| 64 | { } /* Terminating entry */ |
| 65 | }; |
| 66 | |
| 67 | MODULE_DEVICE_TABLE(usb, gigaset_table); |
| 68 | |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 69 | /*======================= local function prototypes =============================*/ |
| 70 | |
| 71 | /* This function is called if a new device is connected to the USB port. It |
| 72 | * checks whether this new device belongs to this driver. |
| 73 | */ |
| 74 | static int gigaset_probe(struct usb_interface *interface, |
| 75 | const struct usb_device_id *id); |
| 76 | |
| 77 | /* Function will be called if the device is unplugged */ |
| 78 | static void gigaset_disconnect(struct usb_interface *interface); |
| 79 | |
| 80 | |
| 81 | /*==============================================================================*/ |
| 82 | |
| 83 | struct bas_cardstate { |
| 84 | struct usb_device *udev; /* USB device pointer */ |
| 85 | struct usb_interface *interface; /* interface for this device */ |
| 86 | unsigned char minor; /* starting minor number */ |
| 87 | |
| 88 | struct urb *urb_ctrl; /* control pipe default URB */ |
| 89 | struct usb_ctrlrequest dr_ctrl; |
| 90 | struct timer_list timer_ctrl; /* control request timeout */ |
| 91 | |
| 92 | struct timer_list timer_atrdy; /* AT command ready timeout */ |
| 93 | struct urb *urb_cmd_out; /* for sending AT commands */ |
| 94 | struct usb_ctrlrequest dr_cmd_out; |
| 95 | int retry_cmd_out; |
| 96 | |
| 97 | struct urb *urb_cmd_in; /* for receiving AT replies */ |
| 98 | struct usb_ctrlrequest dr_cmd_in; |
| 99 | struct timer_list timer_cmd_in; /* receive request timeout */ |
| 100 | unsigned char *rcvbuf; /* AT reply receive buffer */ |
| 101 | |
| 102 | struct urb *urb_int_in; /* URB for interrupt pipe */ |
| 103 | unsigned char int_in_buf[3]; |
| 104 | |
| 105 | spinlock_t lock; /* locks all following */ |
| 106 | atomic_t basstate; /* bitmap (BS_*) */ |
| 107 | int pending; /* uncompleted base request */ |
| 108 | int rcvbuf_size; /* size of AT receive buffer */ |
| 109 | /* 0: no receive in progress */ |
| 110 | int retry_cmd_in; /* receive req retry count */ |
| 111 | }; |
| 112 | |
| 113 | /* status of direct USB connection to 307x base (bits in basstate) */ |
| 114 | #define BS_ATOPEN 0x001 |
| 115 | #define BS_B1OPEN 0x002 |
| 116 | #define BS_B2OPEN 0x004 |
| 117 | #define BS_ATREADY 0x008 |
| 118 | #define BS_INIT 0x010 |
| 119 | #define BS_ATTIMER 0x020 |
| 120 | |
| 121 | |
| 122 | static struct gigaset_driver *driver = NULL; |
| 123 | static struct cardstate *cardstate = NULL; |
| 124 | |
| 125 | /* usb specific object needed to register this driver with the usb subsystem */ |
| 126 | static struct usb_driver gigaset_usb_driver = { |
| 127 | .name = GIGASET_MODULENAME, |
| 128 | .probe = gigaset_probe, |
| 129 | .disconnect = gigaset_disconnect, |
| 130 | .id_table = gigaset_table, |
| 131 | }; |
| 132 | |
| 133 | /* get message text for USB status code |
| 134 | */ |
| 135 | static char *get_usb_statmsg(int status) |
| 136 | { |
| 137 | static char unkmsg[28]; |
| 138 | |
| 139 | switch (status) { |
| 140 | case 0: |
| 141 | return "success"; |
| 142 | case -ENOENT: |
| 143 | return "canceled"; |
| 144 | case -ECONNRESET: |
| 145 | return "canceled (async)"; |
| 146 | case -EINPROGRESS: |
| 147 | return "pending"; |
| 148 | case -EPROTO: |
| 149 | return "bit stuffing or unknown USB error"; |
| 150 | case -EILSEQ: |
| 151 | return "Illegal byte sequence (CRC mismatch)"; |
| 152 | case -EPIPE: |
| 153 | return "babble detect or endpoint stalled"; |
| 154 | case -ENOSR: |
| 155 | return "buffer error"; |
| 156 | case -ETIMEDOUT: |
| 157 | return "timed out"; |
| 158 | case -ENODEV: |
| 159 | return "device not present"; |
| 160 | case -EREMOTEIO: |
| 161 | return "short packet detected"; |
| 162 | case -EXDEV: |
| 163 | return "partial isochronous transfer"; |
| 164 | case -EINVAL: |
| 165 | return "invalid argument"; |
| 166 | case -ENXIO: |
| 167 | return "URB already queued"; |
| 168 | case -EAGAIN: |
| 169 | return "isochronous start frame too early or too much scheduled"; |
| 170 | case -EFBIG: |
| 171 | return "too many isochronous frames requested"; |
| 172 | case -EMSGSIZE: |
| 173 | return "endpoint message size zero"; |
| 174 | case -ESHUTDOWN: |
| 175 | return "endpoint shutdown"; |
| 176 | case -EBUSY: |
| 177 | return "another request pending"; |
| 178 | default: |
| 179 | snprintf(unkmsg, sizeof(unkmsg), "unknown error %d", status); |
| 180 | return unkmsg; |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | /* usb_pipetype_str |
| 185 | * retrieve string representation of USB pipe type |
| 186 | */ |
| 187 | static inline char *usb_pipetype_str(int pipe) |
| 188 | { |
| 189 | if (usb_pipeisoc(pipe)) |
| 190 | return "Isoc"; |
| 191 | if (usb_pipeint(pipe)) |
| 192 | return "Int"; |
| 193 | if (usb_pipecontrol(pipe)) |
| 194 | return "Ctrl"; |
| 195 | if (usb_pipebulk(pipe)) |
| 196 | return "Bulk"; |
| 197 | return "?"; |
| 198 | } |
| 199 | |
| 200 | /* dump_urb |
| 201 | * write content of URB to syslog for debugging |
| 202 | */ |
| 203 | static inline void dump_urb(enum debuglevel level, const char *tag, |
| 204 | struct urb *urb) |
| 205 | { |
| 206 | #ifdef CONFIG_GIGASET_DEBUG |
| 207 | int i; |
| 208 | IFNULLRET(tag); |
| 209 | dbg(level, "%s urb(0x%08lx)->{", tag, (unsigned long) urb); |
| 210 | if (urb) { |
| 211 | dbg(level, |
| 212 | " dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, " |
| 213 | "status=%d, hcpriv=0x%08lx, transfer_flags=0x%x,", |
| 214 | (unsigned long) urb->dev, |
| 215 | usb_pipetype_str(urb->pipe), |
| 216 | usb_pipeendpoint(urb->pipe), usb_pipedevice(urb->pipe), |
| 217 | usb_pipein(urb->pipe) ? "in" : "out", |
| 218 | urb->status, (unsigned long) urb->hcpriv, |
| 219 | urb->transfer_flags); |
| 220 | dbg(level, |
| 221 | " transfer_buffer=0x%08lx[%d], actual_length=%d, " |
| 222 | "bandwidth=%d, setup_packet=0x%08lx,", |
| 223 | (unsigned long) urb->transfer_buffer, |
| 224 | urb->transfer_buffer_length, urb->actual_length, |
| 225 | urb->bandwidth, (unsigned long) urb->setup_packet); |
| 226 | dbg(level, |
| 227 | " start_frame=%d, number_of_packets=%d, interval=%d, " |
| 228 | "error_count=%d,", |
| 229 | urb->start_frame, urb->number_of_packets, urb->interval, |
| 230 | urb->error_count); |
| 231 | dbg(level, |
| 232 | " context=0x%08lx, complete=0x%08lx, iso_frame_desc[]={", |
| 233 | (unsigned long) urb->context, |
| 234 | (unsigned long) urb->complete); |
| 235 | for (i = 0; i < urb->number_of_packets; i++) { |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame^] | 236 | struct usb_iso_packet_descriptor *pifd |
| 237 | = &urb->iso_frame_desc[i]; |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 238 | dbg(level, |
| 239 | " {offset=%u, length=%u, actual_length=%u, " |
| 240 | "status=%u}", |
| 241 | pifd->offset, pifd->length, pifd->actual_length, |
| 242 | pifd->status); |
| 243 | } |
| 244 | } |
| 245 | dbg(level, "}}"); |
| 246 | #endif |
| 247 | } |
| 248 | |
| 249 | /* read/set modem control bits etc. (m10x only) */ |
| 250 | static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state, |
| 251 | unsigned new_state) |
| 252 | { |
| 253 | return -EINVAL; |
| 254 | } |
| 255 | |
| 256 | static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag) |
| 257 | { |
| 258 | return -EINVAL; |
| 259 | } |
| 260 | |
| 261 | static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag) |
| 262 | { |
| 263 | return -EINVAL; |
| 264 | } |
| 265 | |
| 266 | /* error_hangup |
| 267 | * hang up any existing connection because of an unrecoverable error |
| 268 | * This function may be called from any context and takes care of scheduling |
| 269 | * the necessary actions for execution outside of interrupt context. |
| 270 | * argument: |
| 271 | * B channel control structure |
| 272 | */ |
| 273 | static inline void error_hangup(struct bc_state *bcs) |
| 274 | { |
| 275 | struct cardstate *cs = bcs->cs; |
| 276 | |
| 277 | dbg(DEBUG_ANY, |
| 278 | "%s: scheduling HUP for channel %d", __func__, bcs->channel); |
| 279 | |
| 280 | if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) { |
| 281 | //FIXME what should we do? |
| 282 | return; |
| 283 | } |
| 284 | |
| 285 | gigaset_schedule_event(cs); |
| 286 | } |
| 287 | |
| 288 | /* error_reset |
| 289 | * reset Gigaset device because of an unrecoverable error |
| 290 | * This function may be called from any context and takes care of scheduling |
| 291 | * the necessary actions for execution outside of interrupt context. |
| 292 | * argument: |
| 293 | * controller state structure |
| 294 | */ |
| 295 | static inline void error_reset(struct cardstate *cs) |
| 296 | { |
| 297 | //FIXME try to recover without bothering the user |
| 298 | err("unrecoverable error - please disconnect the Gigaset base to reset"); |
| 299 | } |
| 300 | |
| 301 | /* check_pending |
| 302 | * check for completion of pending control request |
| 303 | * parameter: |
| 304 | * urb USB request block of completed request |
| 305 | * urb->context = hardware specific controller state structure |
| 306 | */ |
| 307 | static void check_pending(struct bas_cardstate *ucs) |
| 308 | { |
| 309 | unsigned long flags; |
| 310 | |
| 311 | IFNULLRET(ucs); |
| 312 | IFNULLRET(cardstate); |
| 313 | |
| 314 | spin_lock_irqsave(&ucs->lock, flags); |
| 315 | switch (ucs->pending) { |
| 316 | case 0: |
| 317 | break; |
| 318 | case HD_OPEN_ATCHANNEL: |
| 319 | if (atomic_read(&ucs->basstate) & BS_ATOPEN) |
| 320 | ucs->pending = 0; |
| 321 | break; |
| 322 | case HD_OPEN_B1CHANNEL: |
| 323 | if (atomic_read(&ucs->basstate) & BS_B1OPEN) |
| 324 | ucs->pending = 0; |
| 325 | break; |
| 326 | case HD_OPEN_B2CHANNEL: |
| 327 | if (atomic_read(&ucs->basstate) & BS_B2OPEN) |
| 328 | ucs->pending = 0; |
| 329 | break; |
| 330 | case HD_CLOSE_ATCHANNEL: |
| 331 | if (!(atomic_read(&ucs->basstate) & BS_ATOPEN)) |
| 332 | ucs->pending = 0; |
| 333 | //wake_up_interruptible(cs->initwait); |
| 334 | //FIXME need own wait queue? |
| 335 | break; |
| 336 | case HD_CLOSE_B1CHANNEL: |
| 337 | if (!(atomic_read(&ucs->basstate) & BS_B1OPEN)) |
| 338 | ucs->pending = 0; |
| 339 | break; |
| 340 | case HD_CLOSE_B2CHANNEL: |
| 341 | if (!(atomic_read(&ucs->basstate) & BS_B2OPEN)) |
| 342 | ucs->pending = 0; |
| 343 | break; |
| 344 | case HD_DEVICE_INIT_ACK: /* no reply expected */ |
| 345 | ucs->pending = 0; |
| 346 | break; |
| 347 | /* HD_READ_ATMESSAGE, HD_WRITE_ATMESSAGE, HD_RESET_INTERRUPTPIPE |
| 348 | * are handled separately and should never end up here |
| 349 | */ |
| 350 | default: |
| 351 | warn("unknown pending request 0x%02x cleared", ucs->pending); |
| 352 | ucs->pending = 0; |
| 353 | } |
| 354 | |
| 355 | if (!ucs->pending) |
| 356 | del_timer(&ucs->timer_ctrl); |
| 357 | |
| 358 | spin_unlock_irqrestore(&ucs->lock, flags); |
| 359 | } |
| 360 | |
| 361 | /* cmd_in_timeout |
| 362 | * timeout routine for command input request |
| 363 | * argument: |
| 364 | * controller state structure |
| 365 | */ |
| 366 | static void cmd_in_timeout(unsigned long data) |
| 367 | { |
| 368 | struct cardstate *cs = (struct cardstate *) data; |
| 369 | struct bas_cardstate *ucs; |
| 370 | unsigned long flags; |
| 371 | |
| 372 | IFNULLRET(cs); |
| 373 | ucs = cs->hw.bas; |
| 374 | IFNULLRET(ucs); |
| 375 | |
| 376 | spin_lock_irqsave(&cs->lock, flags); |
| 377 | if (!atomic_read(&cs->connected)) { |
| 378 | dbg(DEBUG_USBREQ, "%s: disconnected", __func__); |
| 379 | spin_unlock_irqrestore(&cs->lock, flags); |
| 380 | return; |
| 381 | } |
| 382 | if (!ucs->rcvbuf_size) { |
| 383 | dbg(DEBUG_USBREQ, "%s: no receive in progress", __func__); |
| 384 | spin_unlock_irqrestore(&cs->lock, flags); |
| 385 | return; |
| 386 | } |
| 387 | spin_unlock_irqrestore(&cs->lock, flags); |
| 388 | |
| 389 | err("timeout reading AT response"); |
| 390 | error_reset(cs); //FIXME retry? |
| 391 | } |
| 392 | |
| 393 | |
| 394 | static void read_ctrl_callback(struct urb *urb, struct pt_regs *regs); |
| 395 | |
| 396 | /* atread_submit |
| 397 | * submit an HD_READ_ATMESSAGE command URB |
| 398 | * parameters: |
| 399 | * cs controller state structure |
| 400 | * timeout timeout in 1/10 sec., 0: none |
| 401 | * return value: |
| 402 | * 0 on success |
| 403 | * -EINVAL if a NULL pointer is encountered somewhere |
| 404 | * -EBUSY if another request is pending |
| 405 | * any URB submission error code |
| 406 | */ |
| 407 | static int atread_submit(struct cardstate *cs, int timeout) |
| 408 | { |
| 409 | struct bas_cardstate *ucs; |
| 410 | int ret; |
| 411 | |
| 412 | IFNULLRETVAL(cs, -EINVAL); |
| 413 | ucs = cs->hw.bas; |
| 414 | IFNULLRETVAL(ucs, -EINVAL); |
| 415 | IFNULLRETVAL(ucs->urb_cmd_in, -EINVAL); |
| 416 | |
| 417 | dbg(DEBUG_USBREQ, "-------> HD_READ_ATMESSAGE (%d)", ucs->rcvbuf_size); |
| 418 | |
| 419 | if (ucs->urb_cmd_in->status == -EINPROGRESS) { |
| 420 | err("could not submit HD_READ_ATMESSAGE: URB busy"); |
| 421 | return -EBUSY; |
| 422 | } |
| 423 | |
| 424 | ucs->dr_cmd_in.bRequestType = IN_VENDOR_REQ; |
| 425 | ucs->dr_cmd_in.bRequest = HD_READ_ATMESSAGE; |
| 426 | ucs->dr_cmd_in.wValue = 0; |
| 427 | ucs->dr_cmd_in.wIndex = 0; |
| 428 | ucs->dr_cmd_in.wLength = cpu_to_le16(ucs->rcvbuf_size); |
| 429 | usb_fill_control_urb(ucs->urb_cmd_in, ucs->udev, |
| 430 | usb_rcvctrlpipe(ucs->udev, 0), |
| 431 | (unsigned char*) & ucs->dr_cmd_in, |
| 432 | ucs->rcvbuf, ucs->rcvbuf_size, |
| 433 | read_ctrl_callback, cs->inbuf); |
| 434 | |
| 435 | if ((ret = usb_submit_urb(ucs->urb_cmd_in, SLAB_ATOMIC)) != 0) { |
| 436 | err("could not submit HD_READ_ATMESSAGE: %s", |
| 437 | get_usb_statmsg(ret)); |
| 438 | return ret; |
| 439 | } |
| 440 | |
| 441 | if (timeout > 0) { |
| 442 | dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout); |
| 443 | ucs->timer_cmd_in.expires = jiffies + timeout * HZ / 10; |
| 444 | ucs->timer_cmd_in.data = (unsigned long) cs; |
| 445 | ucs->timer_cmd_in.function = cmd_in_timeout; |
| 446 | add_timer(&ucs->timer_cmd_in); |
| 447 | } |
| 448 | return 0; |
| 449 | } |
| 450 | |
| 451 | static void stopurbs(struct bas_bc_state *); |
| 452 | static int start_cbsend(struct cardstate *); |
| 453 | |
| 454 | /* set/clear bits in base connection state |
| 455 | */ |
| 456 | inline static void update_basstate(struct bas_cardstate *ucs, |
| 457 | int set, int clear) |
| 458 | { |
| 459 | unsigned long flags; |
| 460 | int state; |
| 461 | |
| 462 | spin_lock_irqsave(&ucs->lock, flags); |
| 463 | state = atomic_read(&ucs->basstate); |
| 464 | state &= ~clear; |
| 465 | state |= set; |
| 466 | atomic_set(&ucs->basstate, state); |
| 467 | spin_unlock_irqrestore(&ucs->lock, flags); |
| 468 | } |
| 469 | |
| 470 | |
| 471 | /* read_int_callback |
| 472 | * USB completion handler for interrupt pipe input |
| 473 | * called by the USB subsystem in interrupt context |
| 474 | * parameter: |
| 475 | * urb USB request block |
| 476 | * urb->context = controller state structure |
| 477 | */ |
| 478 | static void read_int_callback(struct urb *urb, struct pt_regs *regs) |
| 479 | { |
| 480 | struct cardstate *cs; |
| 481 | struct bas_cardstate *ucs; |
| 482 | struct bc_state *bcs; |
| 483 | unsigned long flags; |
| 484 | int status; |
| 485 | unsigned l; |
| 486 | int channel; |
| 487 | |
| 488 | IFNULLRET(urb); |
| 489 | cs = (struct cardstate *) urb->context; |
| 490 | IFNULLRET(cs); |
| 491 | ucs = cs->hw.bas; |
| 492 | IFNULLRET(ucs); |
| 493 | |
| 494 | if (unlikely(!atomic_read(&cs->connected))) { |
| 495 | warn("%s: disconnected", __func__); |
| 496 | return; |
| 497 | } |
| 498 | |
| 499 | switch (urb->status) { |
| 500 | case 0: /* success */ |
| 501 | break; |
| 502 | case -ENOENT: /* canceled */ |
| 503 | case -ECONNRESET: /* canceled (async) */ |
| 504 | case -EINPROGRESS: /* pending */ |
| 505 | /* ignore silently */ |
| 506 | dbg(DEBUG_USBREQ, |
| 507 | "%s: %s", __func__, get_usb_statmsg(urb->status)); |
| 508 | return; |
| 509 | default: /* severe trouble */ |
| 510 | warn("interrupt read: %s", get_usb_statmsg(urb->status)); |
| 511 | //FIXME corrective action? resubmission always ok? |
| 512 | goto resubmit; |
| 513 | } |
| 514 | |
| 515 | l = (unsigned) ucs->int_in_buf[1] + |
| 516 | (((unsigned) ucs->int_in_buf[2]) << 8); |
| 517 | |
| 518 | dbg(DEBUG_USBREQ, |
| 519 | "<-------%d: 0x%02x (%u [0x%02x 0x%02x])", urb->actual_length, |
| 520 | (int)ucs->int_in_buf[0], l, |
| 521 | (int)ucs->int_in_buf[1], (int)ucs->int_in_buf[2]); |
| 522 | |
| 523 | channel = 0; |
| 524 | |
| 525 | switch (ucs->int_in_buf[0]) { |
| 526 | case HD_DEVICE_INIT_OK: |
| 527 | update_basstate(ucs, BS_INIT, 0); |
| 528 | break; |
| 529 | |
| 530 | case HD_READY_SEND_ATDATA: |
| 531 | del_timer(&ucs->timer_atrdy); |
| 532 | update_basstate(ucs, BS_ATREADY, BS_ATTIMER); |
| 533 | start_cbsend(cs); |
| 534 | break; |
| 535 | |
| 536 | case HD_OPEN_B2CHANNEL_ACK: |
| 537 | ++channel; |
| 538 | case HD_OPEN_B1CHANNEL_ACK: |
| 539 | bcs = cs->bcs + channel; |
| 540 | update_basstate(ucs, BS_B1OPEN << channel, 0); |
| 541 | gigaset_bchannel_up(bcs); |
| 542 | break; |
| 543 | |
| 544 | case HD_OPEN_ATCHANNEL_ACK: |
| 545 | update_basstate(ucs, BS_ATOPEN, 0); |
| 546 | start_cbsend(cs); |
| 547 | break; |
| 548 | |
| 549 | case HD_CLOSE_B2CHANNEL_ACK: |
| 550 | ++channel; |
| 551 | case HD_CLOSE_B1CHANNEL_ACK: |
| 552 | bcs = cs->bcs + channel; |
| 553 | update_basstate(ucs, 0, BS_B1OPEN << channel); |
| 554 | stopurbs(bcs->hw.bas); |
| 555 | gigaset_bchannel_down(bcs); |
| 556 | break; |
| 557 | |
| 558 | case HD_CLOSE_ATCHANNEL_ACK: |
| 559 | update_basstate(ucs, 0, BS_ATOPEN); |
| 560 | break; |
| 561 | |
| 562 | case HD_B2_FLOW_CONTROL: |
| 563 | ++channel; |
| 564 | case HD_B1_FLOW_CONTROL: |
| 565 | bcs = cs->bcs + channel; |
| 566 | atomic_add((l - BAS_NORMFRAME) * BAS_CORRFRAMES, |
| 567 | &bcs->hw.bas->corrbytes); |
| 568 | dbg(DEBUG_ISO, |
| 569 | "Flow control (channel %d, sub %d): 0x%02x => %d", |
| 570 | channel, bcs->hw.bas->numsub, l, |
| 571 | atomic_read(&bcs->hw.bas->corrbytes)); |
| 572 | break; |
| 573 | |
| 574 | case HD_RECEIVEATDATA_ACK: /* AT response ready to be received */ |
| 575 | if (!l) { |
| 576 | warn("HD_RECEIVEATDATA_ACK with length 0 ignored"); |
| 577 | break; |
| 578 | } |
| 579 | spin_lock_irqsave(&cs->lock, flags); |
| 580 | if (ucs->rcvbuf_size) { |
| 581 | spin_unlock_irqrestore(&cs->lock, flags); |
| 582 | err("receive AT data overrun, %d bytes lost", l); |
| 583 | error_reset(cs); //FIXME reschedule |
| 584 | break; |
| 585 | } |
| 586 | if ((ucs->rcvbuf = kmalloc(l, GFP_ATOMIC)) == NULL) { |
| 587 | spin_unlock_irqrestore(&cs->lock, flags); |
| 588 | err("%s: out of memory, %d bytes lost", __func__, l); |
| 589 | error_reset(cs); //FIXME reschedule |
| 590 | break; |
| 591 | } |
| 592 | ucs->rcvbuf_size = l; |
| 593 | ucs->retry_cmd_in = 0; |
| 594 | if ((status = atread_submit(cs, BAS_TIMEOUT)) < 0) { |
| 595 | kfree(ucs->rcvbuf); |
| 596 | ucs->rcvbuf = NULL; |
| 597 | ucs->rcvbuf_size = 0; |
| 598 | error_reset(cs); //FIXME reschedule |
| 599 | } |
| 600 | spin_unlock_irqrestore(&cs->lock, flags); |
| 601 | break; |
| 602 | |
| 603 | case HD_RESET_INTERRUPT_PIPE_ACK: |
| 604 | dbg(DEBUG_USBREQ, "HD_RESET_INTERRUPT_PIPE_ACK"); |
| 605 | break; |
| 606 | |
| 607 | case HD_SUSPEND_END: |
| 608 | dbg(DEBUG_USBREQ, "HD_SUSPEND_END"); |
| 609 | break; |
| 610 | |
| 611 | default: |
| 612 | warn("unknown Gigaset signal 0x%02x (%u) ignored", |
| 613 | (int) ucs->int_in_buf[0], l); |
| 614 | } |
| 615 | |
| 616 | check_pending(ucs); |
| 617 | |
| 618 | resubmit: |
| 619 | status = usb_submit_urb(urb, SLAB_ATOMIC); |
| 620 | if (unlikely(status)) { |
| 621 | err("could not resubmit interrupt URB: %s", |
| 622 | get_usb_statmsg(status)); |
| 623 | error_reset(cs); |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | /* read_ctrl_callback |
| 628 | * USB completion handler for control pipe input |
| 629 | * called by the USB subsystem in interrupt context |
| 630 | * parameter: |
| 631 | * urb USB request block |
| 632 | * urb->context = inbuf structure for controller state |
| 633 | */ |
| 634 | static void read_ctrl_callback(struct urb *urb, struct pt_regs *regs) |
| 635 | { |
| 636 | struct cardstate *cs; |
| 637 | struct bas_cardstate *ucs; |
| 638 | unsigned numbytes; |
| 639 | unsigned long flags; |
| 640 | struct inbuf_t *inbuf; |
| 641 | int have_data = 0; |
| 642 | |
| 643 | IFNULLRET(urb); |
| 644 | inbuf = (struct inbuf_t *) urb->context; |
| 645 | IFNULLRET(inbuf); |
| 646 | cs = inbuf->cs; |
| 647 | IFNULLRET(cs); |
| 648 | ucs = cs->hw.bas; |
| 649 | IFNULLRET(ucs); |
| 650 | |
| 651 | spin_lock_irqsave(&cs->lock, flags); |
| 652 | if (!atomic_read(&cs->connected)) { |
| 653 | warn("%s: disconnected", __func__); |
| 654 | spin_unlock_irqrestore(&cs->lock, flags); |
| 655 | return; |
| 656 | } |
| 657 | |
| 658 | if (!ucs->rcvbuf_size) { |
| 659 | warn("%s: no receive in progress", __func__); |
| 660 | spin_unlock_irqrestore(&cs->lock, flags); |
| 661 | return; |
| 662 | } |
| 663 | |
| 664 | del_timer(&ucs->timer_cmd_in); |
| 665 | |
| 666 | switch (urb->status) { |
| 667 | case 0: /* normal completion */ |
| 668 | numbytes = urb->actual_length; |
| 669 | if (unlikely(numbytes == 0)) { |
| 670 | warn("control read: empty block received"); |
| 671 | goto retry; |
| 672 | } |
| 673 | if (unlikely(numbytes != ucs->rcvbuf_size)) { |
| 674 | warn("control read: received %d chars, expected %d", |
| 675 | numbytes, ucs->rcvbuf_size); |
| 676 | if (numbytes > ucs->rcvbuf_size) |
| 677 | numbytes = ucs->rcvbuf_size; |
| 678 | } |
| 679 | |
| 680 | /* copy received bytes to inbuf */ |
| 681 | have_data = gigaset_fill_inbuf(inbuf, ucs->rcvbuf, numbytes); |
| 682 | |
| 683 | if (unlikely(numbytes < ucs->rcvbuf_size)) { |
| 684 | /* incomplete - resubmit for remaining bytes */ |
| 685 | ucs->rcvbuf_size -= numbytes; |
| 686 | ucs->retry_cmd_in = 0; |
| 687 | goto retry; |
| 688 | } |
| 689 | break; |
| 690 | |
| 691 | case -ENOENT: /* canceled */ |
| 692 | case -ECONNRESET: /* canceled (async) */ |
| 693 | case -EINPROGRESS: /* pending */ |
| 694 | /* no action necessary */ |
| 695 | dbg(DEBUG_USBREQ, |
| 696 | "%s: %s", __func__, get_usb_statmsg(urb->status)); |
| 697 | break; |
| 698 | |
| 699 | default: /* severe trouble */ |
| 700 | warn("control read: %s", get_usb_statmsg(urb->status)); |
| 701 | retry: |
| 702 | if (ucs->retry_cmd_in++ < BAS_RETRY) { |
| 703 | notice("control read: retry %d", ucs->retry_cmd_in); |
| 704 | if (atread_submit(cs, BAS_TIMEOUT) >= 0) { |
| 705 | /* resubmitted - bypass regular exit block */ |
| 706 | spin_unlock_irqrestore(&cs->lock, flags); |
| 707 | return; |
| 708 | } |
| 709 | } else { |
| 710 | err("control read: giving up after %d tries", |
| 711 | ucs->retry_cmd_in); |
| 712 | } |
| 713 | error_reset(cs); |
| 714 | } |
| 715 | |
| 716 | kfree(ucs->rcvbuf); |
| 717 | ucs->rcvbuf = NULL; |
| 718 | ucs->rcvbuf_size = 0; |
| 719 | spin_unlock_irqrestore(&cs->lock, flags); |
| 720 | if (have_data) { |
| 721 | dbg(DEBUG_INTR, "%s-->BH", __func__); |
| 722 | gigaset_schedule_event(cs); |
| 723 | } |
| 724 | } |
| 725 | |
| 726 | /* read_iso_callback |
| 727 | * USB completion handler for B channel isochronous input |
| 728 | * called by the USB subsystem in interrupt context |
| 729 | * parameter: |
| 730 | * urb USB request block of completed request |
| 731 | * urb->context = bc_state structure |
| 732 | */ |
| 733 | static void read_iso_callback(struct urb *urb, struct pt_regs *regs) |
| 734 | { |
| 735 | struct bc_state *bcs; |
| 736 | struct bas_bc_state *ubc; |
| 737 | unsigned long flags; |
| 738 | int i, rc; |
| 739 | |
| 740 | IFNULLRET(urb); |
| 741 | IFNULLRET(urb->context); |
| 742 | IFNULLRET(cardstate); |
| 743 | |
| 744 | /* status codes not worth bothering the tasklet with */ |
| 745 | if (unlikely(urb->status == -ENOENT || urb->status == -ECONNRESET || |
| 746 | urb->status == -EINPROGRESS)) { |
| 747 | dbg(DEBUG_ISO, |
| 748 | "%s: %s", __func__, get_usb_statmsg(urb->status)); |
| 749 | return; |
| 750 | } |
| 751 | |
| 752 | bcs = (struct bc_state *) urb->context; |
| 753 | ubc = bcs->hw.bas; |
| 754 | IFNULLRET(ubc); |
| 755 | |
| 756 | spin_lock_irqsave(&ubc->isoinlock, flags); |
| 757 | if (likely(ubc->isoindone == NULL)) { |
| 758 | /* pass URB to tasklet */ |
| 759 | ubc->isoindone = urb; |
| 760 | tasklet_schedule(&ubc->rcvd_tasklet); |
| 761 | } else { |
| 762 | /* tasklet still busy, drop data and resubmit URB */ |
| 763 | ubc->loststatus = urb->status; |
| 764 | for (i = 0; i < BAS_NUMFRAMES; i++) { |
| 765 | ubc->isoinlost += urb->iso_frame_desc[i].actual_length; |
| 766 | if (unlikely(urb->iso_frame_desc[i].status != 0 && |
| 767 | urb->iso_frame_desc[i].status != -EINPROGRESS)) { |
| 768 | ubc->loststatus = urb->iso_frame_desc[i].status; |
| 769 | } |
| 770 | urb->iso_frame_desc[i].status = 0; |
| 771 | urb->iso_frame_desc[i].actual_length = 0; |
| 772 | } |
| 773 | if (likely(atomic_read(&ubc->running))) { |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame^] | 774 | urb->dev = bcs->cs->hw.bas->udev; /* clobbered by USB subsystem */ |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 775 | urb->transfer_flags = URB_ISO_ASAP; |
| 776 | urb->number_of_packets = BAS_NUMFRAMES; |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame^] | 777 | dbg(DEBUG_ISO, "%s: isoc read overrun/resubmit", |
| 778 | __func__); |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 779 | rc = usb_submit_urb(urb, SLAB_ATOMIC); |
| 780 | if (unlikely(rc != 0)) { |
| 781 | err("could not resubmit isochronous read URB: %s", |
| 782 | get_usb_statmsg(rc)); |
| 783 | dump_urb(DEBUG_ISO, "isoc read", urb); |
| 784 | error_hangup(bcs); |
| 785 | } |
| 786 | } |
| 787 | } |
| 788 | spin_unlock_irqrestore(&ubc->isoinlock, flags); |
| 789 | } |
| 790 | |
| 791 | /* write_iso_callback |
| 792 | * USB completion handler for B channel isochronous output |
| 793 | * called by the USB subsystem in interrupt context |
| 794 | * parameter: |
| 795 | * urb USB request block of completed request |
| 796 | * urb->context = isow_urbctx_t structure |
| 797 | */ |
| 798 | static void write_iso_callback(struct urb *urb, struct pt_regs *regs) |
| 799 | { |
| 800 | struct isow_urbctx_t *ucx; |
| 801 | struct bas_bc_state *ubc; |
| 802 | unsigned long flags; |
| 803 | |
| 804 | IFNULLRET(urb); |
| 805 | IFNULLRET(urb->context); |
| 806 | IFNULLRET(cardstate); |
| 807 | |
| 808 | /* status codes not worth bothering the tasklet with */ |
| 809 | if (unlikely(urb->status == -ENOENT || urb->status == -ECONNRESET || |
| 810 | urb->status == -EINPROGRESS)) { |
| 811 | dbg(DEBUG_ISO, |
| 812 | "%s: %s", __func__, get_usb_statmsg(urb->status)); |
| 813 | return; |
| 814 | } |
| 815 | |
| 816 | /* pass URB context to tasklet */ |
| 817 | ucx = (struct isow_urbctx_t *) urb->context; |
| 818 | IFNULLRET(ucx->bcs); |
| 819 | ubc = ucx->bcs->hw.bas; |
| 820 | IFNULLRET(ubc); |
| 821 | |
| 822 | spin_lock_irqsave(&ubc->isooutlock, flags); |
| 823 | ubc->isooutovfl = ubc->isooutdone; |
| 824 | ubc->isooutdone = ucx; |
| 825 | spin_unlock_irqrestore(&ubc->isooutlock, flags); |
| 826 | tasklet_schedule(&ubc->sent_tasklet); |
| 827 | } |
| 828 | |
| 829 | /* starturbs |
| 830 | * prepare and submit USB request blocks for isochronous input and output |
| 831 | * argument: |
| 832 | * B channel control structure |
| 833 | * return value: |
| 834 | * 0 on success |
| 835 | * < 0 on error (no URBs submitted) |
| 836 | */ |
| 837 | static int starturbs(struct bc_state *bcs) |
| 838 | { |
| 839 | struct urb *urb; |
| 840 | struct bas_bc_state *ubc; |
| 841 | int j, k; |
| 842 | int rc; |
| 843 | |
| 844 | IFNULLRETVAL(bcs, -EFAULT); |
| 845 | ubc = bcs->hw.bas; |
| 846 | IFNULLRETVAL(ubc, -EFAULT); |
| 847 | |
| 848 | /* initialize L2 reception */ |
| 849 | if (bcs->proto2 == ISDN_PROTO_L2_HDLC) |
| 850 | bcs->inputstate |= INS_flag_hunt; |
| 851 | |
| 852 | /* submit all isochronous input URBs */ |
| 853 | atomic_set(&ubc->running, 1); |
| 854 | for (k = 0; k < BAS_INURBS; k++) { |
| 855 | urb = ubc->isoinurbs[k]; |
| 856 | if (!urb) { |
| 857 | err("isoinurbs[%d]==NULL", k); |
| 858 | rc = -EFAULT; |
| 859 | goto error; |
| 860 | } |
| 861 | |
| 862 | urb->dev = bcs->cs->hw.bas->udev; |
| 863 | urb->pipe = usb_rcvisocpipe(urb->dev, 3 + 2 * bcs->channel); |
| 864 | urb->transfer_flags = URB_ISO_ASAP; |
| 865 | urb->transfer_buffer = ubc->isoinbuf + k * BAS_INBUFSIZE; |
| 866 | urb->transfer_buffer_length = BAS_INBUFSIZE; |
| 867 | urb->number_of_packets = BAS_NUMFRAMES; |
| 868 | urb->interval = BAS_FRAMETIME; |
| 869 | urb->complete = read_iso_callback; |
| 870 | urb->context = bcs; |
| 871 | for (j = 0; j < BAS_NUMFRAMES; j++) { |
| 872 | urb->iso_frame_desc[j].offset = j * BAS_MAXFRAME; |
| 873 | urb->iso_frame_desc[j].length = BAS_MAXFRAME; |
| 874 | urb->iso_frame_desc[j].status = 0; |
| 875 | urb->iso_frame_desc[j].actual_length = 0; |
| 876 | } |
| 877 | |
| 878 | dump_urb(DEBUG_ISO, "Initial isoc read", urb); |
| 879 | if ((rc = usb_submit_urb(urb, SLAB_ATOMIC)) != 0) { |
| 880 | err("could not submit isochronous read URB %d: %s", |
| 881 | k, get_usb_statmsg(rc)); |
| 882 | goto error; |
| 883 | } |
| 884 | } |
| 885 | |
| 886 | /* initialize L2 transmission */ |
| 887 | gigaset_isowbuf_init(ubc->isooutbuf, PPP_FLAG); |
| 888 | |
| 889 | /* set up isochronous output URBs for flag idling */ |
| 890 | for (k = 0; k < BAS_OUTURBS; ++k) { |
| 891 | urb = ubc->isoouturbs[k].urb; |
| 892 | if (!urb) { |
| 893 | err("isoouturbs[%d].urb==NULL", k); |
| 894 | rc = -EFAULT; |
| 895 | goto error; |
| 896 | } |
| 897 | urb->dev = bcs->cs->hw.bas->udev; |
| 898 | urb->pipe = usb_sndisocpipe(urb->dev, 4 + 2 * bcs->channel); |
| 899 | urb->transfer_flags = URB_ISO_ASAP; |
| 900 | urb->transfer_buffer = ubc->isooutbuf->data; |
| 901 | urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data); |
| 902 | urb->number_of_packets = BAS_NUMFRAMES; |
| 903 | urb->interval = BAS_FRAMETIME; |
| 904 | urb->complete = write_iso_callback; |
| 905 | urb->context = &ubc->isoouturbs[k]; |
| 906 | for (j = 0; j < BAS_NUMFRAMES; ++j) { |
| 907 | urb->iso_frame_desc[j].offset = BAS_OUTBUFSIZE; |
| 908 | urb->iso_frame_desc[j].length = BAS_NORMFRAME; |
| 909 | urb->iso_frame_desc[j].status = 0; |
| 910 | urb->iso_frame_desc[j].actual_length = 0; |
| 911 | } |
| 912 | ubc->isoouturbs[k].limit = -1; |
| 913 | } |
| 914 | |
| 915 | /* submit two URBs, keep third one */ |
| 916 | for (k = 0; k < 2; ++k) { |
| 917 | dump_urb(DEBUG_ISO, "Initial isoc write", urb); |
| 918 | rc = usb_submit_urb(ubc->isoouturbs[k].urb, SLAB_ATOMIC); |
| 919 | if (rc != 0) { |
| 920 | err("could not submit isochronous write URB %d: %s", |
| 921 | k, get_usb_statmsg(rc)); |
| 922 | goto error; |
| 923 | } |
| 924 | } |
| 925 | dump_urb(DEBUG_ISO, "Initial isoc write (free)", urb); |
| 926 | ubc->isooutfree = &ubc->isoouturbs[2]; |
| 927 | ubc->isooutdone = ubc->isooutovfl = NULL; |
| 928 | return 0; |
| 929 | error: |
| 930 | stopurbs(ubc); |
| 931 | return rc; |
| 932 | } |
| 933 | |
| 934 | /* stopurbs |
| 935 | * cancel the USB request blocks for isochronous input and output |
| 936 | * errors are silently ignored |
| 937 | * argument: |
| 938 | * B channel control structure |
| 939 | */ |
| 940 | static void stopurbs(struct bas_bc_state *ubc) |
| 941 | { |
| 942 | int k, rc; |
| 943 | |
| 944 | IFNULLRET(ubc); |
| 945 | |
| 946 | atomic_set(&ubc->running, 0); |
| 947 | |
| 948 | for (k = 0; k < BAS_INURBS; ++k) { |
| 949 | rc = usb_unlink_urb(ubc->isoinurbs[k]); |
| 950 | dbg(DEBUG_ISO, "%s: isoc input URB %d unlinked, result = %d", |
| 951 | __func__, k, rc); |
| 952 | } |
| 953 | |
| 954 | for (k = 0; k < BAS_OUTURBS; ++k) { |
| 955 | rc = usb_unlink_urb(ubc->isoouturbs[k].urb); |
| 956 | dbg(DEBUG_ISO, "%s: isoc output URB %d unlinked, result = %d", |
| 957 | __func__, k, rc); |
| 958 | } |
| 959 | } |
| 960 | |
| 961 | /* Isochronous Write - Bottom Half */ |
| 962 | /* =============================== */ |
| 963 | |
| 964 | /* submit_iso_write_urb |
| 965 | * fill and submit the next isochronous write URB |
| 966 | * parameters: |
| 967 | * bcs B channel state structure |
| 968 | * return value: |
| 969 | * number of frames submitted in URB |
| 970 | * 0 if URB not submitted because no data available (isooutbuf busy) |
| 971 | * error code < 0 on error |
| 972 | */ |
| 973 | static int submit_iso_write_urb(struct isow_urbctx_t *ucx) |
| 974 | { |
| 975 | struct urb *urb; |
| 976 | struct bas_bc_state *ubc; |
| 977 | struct usb_iso_packet_descriptor *ifd; |
| 978 | int corrbytes, nframe, rc; |
| 979 | |
| 980 | IFNULLRETVAL(ucx, -EFAULT); |
| 981 | urb = ucx->urb; |
| 982 | IFNULLRETVAL(urb, -EFAULT); |
| 983 | IFNULLRETVAL(ucx->bcs, -EFAULT); |
| 984 | ubc = ucx->bcs->hw.bas; |
| 985 | IFNULLRETVAL(ubc, -EFAULT); |
| 986 | |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame^] | 987 | urb->dev = ucx->bcs->cs->hw.bas->udev; /* clobbered by USB subsystem */ |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 988 | urb->transfer_flags = URB_ISO_ASAP; |
| 989 | urb->transfer_buffer = ubc->isooutbuf->data; |
| 990 | urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data); |
| 991 | |
| 992 | for (nframe = 0; nframe < BAS_NUMFRAMES; nframe++) { |
| 993 | ifd = &urb->iso_frame_desc[nframe]; |
| 994 | |
| 995 | /* compute frame length according to flow control */ |
| 996 | ifd->length = BAS_NORMFRAME; |
| 997 | if ((corrbytes = atomic_read(&ubc->corrbytes)) != 0) { |
| 998 | dbg(DEBUG_ISO, "%s: corrbytes=%d", __func__, corrbytes); |
| 999 | if (corrbytes > BAS_HIGHFRAME - BAS_NORMFRAME) |
| 1000 | corrbytes = BAS_HIGHFRAME - BAS_NORMFRAME; |
| 1001 | else if (corrbytes < BAS_LOWFRAME - BAS_NORMFRAME) |
| 1002 | corrbytes = BAS_LOWFRAME - BAS_NORMFRAME; |
| 1003 | ifd->length += corrbytes; |
| 1004 | atomic_add(-corrbytes, &ubc->corrbytes); |
| 1005 | } |
| 1006 | //dbg(DEBUG_ISO, "%s: frame %d length=%d", __func__, nframe, ifd->length); |
| 1007 | |
| 1008 | /* retrieve block of data to send */ |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame^] | 1009 | ifd->offset = gigaset_isowbuf_getbytes(ubc->isooutbuf, |
| 1010 | ifd->length); |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 1011 | if (ifd->offset < 0) { |
| 1012 | if (ifd->offset == -EBUSY) { |
| 1013 | dbg(DEBUG_ISO, "%s: buffer busy at frame %d", |
| 1014 | __func__, nframe); |
| 1015 | /* tasklet will be restarted from gigaset_send_skb() */ |
| 1016 | } else { |
| 1017 | err("%s: buffer error %d at frame %d", |
| 1018 | __func__, ifd->offset, nframe); |
| 1019 | return ifd->offset; |
| 1020 | } |
| 1021 | break; |
| 1022 | } |
| 1023 | ucx->limit = atomic_read(&ubc->isooutbuf->nextread); |
| 1024 | ifd->status = 0; |
| 1025 | ifd->actual_length = 0; |
| 1026 | } |
| 1027 | if ((urb->number_of_packets = nframe) > 0) { |
| 1028 | if ((rc = usb_submit_urb(urb, SLAB_ATOMIC)) != 0) { |
| 1029 | err("could not submit isochronous write URB: %s", |
| 1030 | get_usb_statmsg(rc)); |
| 1031 | dump_urb(DEBUG_ISO, "isoc write", urb); |
| 1032 | return rc; |
| 1033 | } |
| 1034 | ++ubc->numsub; |
| 1035 | } |
| 1036 | return nframe; |
| 1037 | } |
| 1038 | |
| 1039 | /* write_iso_tasklet |
| 1040 | * tasklet scheduled when an isochronous output URB from the Gigaset device |
| 1041 | * has completed |
| 1042 | * parameter: |
| 1043 | * data B channel state structure |
| 1044 | */ |
| 1045 | static void write_iso_tasklet(unsigned long data) |
| 1046 | { |
| 1047 | struct bc_state *bcs; |
| 1048 | struct bas_bc_state *ubc; |
| 1049 | struct cardstate *cs; |
| 1050 | struct isow_urbctx_t *done, *next, *ovfl; |
| 1051 | struct urb *urb; |
| 1052 | struct usb_iso_packet_descriptor *ifd; |
| 1053 | int offset; |
| 1054 | unsigned long flags; |
| 1055 | int i; |
| 1056 | struct sk_buff *skb; |
| 1057 | int len; |
| 1058 | |
| 1059 | bcs = (struct bc_state *) data; |
| 1060 | IFNULLRET(bcs); |
| 1061 | ubc = bcs->hw.bas; |
| 1062 | IFNULLRET(ubc); |
| 1063 | cs = bcs->cs; |
| 1064 | IFNULLRET(cs); |
| 1065 | |
| 1066 | /* loop while completed URBs arrive in time */ |
| 1067 | for (;;) { |
| 1068 | if (unlikely(!atomic_read(&cs->connected))) { |
| 1069 | warn("%s: disconnected", __func__); |
| 1070 | return; |
| 1071 | } |
| 1072 | |
| 1073 | if (unlikely(!(atomic_read(&ubc->running)))) { |
| 1074 | dbg(DEBUG_ISO, "%s: not running", __func__); |
| 1075 | return; |
| 1076 | } |
| 1077 | |
| 1078 | /* retrieve completed URBs */ |
| 1079 | spin_lock_irqsave(&ubc->isooutlock, flags); |
| 1080 | done = ubc->isooutdone; |
| 1081 | ubc->isooutdone = NULL; |
| 1082 | ovfl = ubc->isooutovfl; |
| 1083 | ubc->isooutovfl = NULL; |
| 1084 | spin_unlock_irqrestore(&ubc->isooutlock, flags); |
| 1085 | if (ovfl) { |
| 1086 | err("isochronous write buffer underrun - buy a faster machine :-)"); |
| 1087 | error_hangup(bcs); |
| 1088 | break; |
| 1089 | } |
| 1090 | if (!done) |
| 1091 | break; |
| 1092 | |
| 1093 | /* submit free URB if available */ |
| 1094 | spin_lock_irqsave(&ubc->isooutlock, flags); |
| 1095 | next = ubc->isooutfree; |
| 1096 | ubc->isooutfree = NULL; |
| 1097 | spin_unlock_irqrestore(&ubc->isooutlock, flags); |
| 1098 | if (next) { |
| 1099 | if (submit_iso_write_urb(next) <= 0) { |
| 1100 | /* could not submit URB, put it back */ |
| 1101 | spin_lock_irqsave(&ubc->isooutlock, flags); |
| 1102 | if (ubc->isooutfree == NULL) { |
| 1103 | ubc->isooutfree = next; |
| 1104 | next = NULL; |
| 1105 | } |
| 1106 | spin_unlock_irqrestore(&ubc->isooutlock, flags); |
| 1107 | if (next) { |
| 1108 | /* couldn't put it back */ |
| 1109 | err("losing isochronous write URB"); |
| 1110 | error_hangup(bcs); |
| 1111 | } |
| 1112 | } |
| 1113 | } |
| 1114 | |
| 1115 | /* process completed URB */ |
| 1116 | urb = done->urb; |
| 1117 | switch (urb->status) { |
| 1118 | case 0: /* normal completion */ |
| 1119 | break; |
| 1120 | case -EXDEV: /* inspect individual frames */ |
| 1121 | /* assumptions (for lack of documentation): |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame^] | 1122 | * - actual_length bytes of the frame in error are |
| 1123 | * successfully sent |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 1124 | * - all following frames are not sent at all |
| 1125 | */ |
| 1126 | dbg(DEBUG_ISO, "%s: URB partially completed", __func__); |
| 1127 | offset = done->limit; /* just in case */ |
| 1128 | for (i = 0; i < BAS_NUMFRAMES; i++) { |
| 1129 | ifd = &urb->iso_frame_desc[i]; |
| 1130 | if (ifd->status || |
| 1131 | ifd->actual_length != ifd->length) { |
| 1132 | warn("isochronous write: frame %d: %s, " |
| 1133 | "only %d of %d bytes sent", |
| 1134 | i, get_usb_statmsg(ifd->status), |
| 1135 | ifd->actual_length, ifd->length); |
| 1136 | offset = (ifd->offset + |
| 1137 | ifd->actual_length) |
| 1138 | % BAS_OUTBUFSIZE; |
| 1139 | break; |
| 1140 | } |
| 1141 | } |
| 1142 | #ifdef CONFIG_GIGASET_DEBUG |
| 1143 | /* check assumption on remaining frames */ |
| 1144 | for (; i < BAS_NUMFRAMES; i++) { |
| 1145 | ifd = &urb->iso_frame_desc[i]; |
| 1146 | if (ifd->status != -EINPROGRESS |
| 1147 | || ifd->actual_length != 0) { |
| 1148 | warn("isochronous write: frame %d: %s, " |
| 1149 | "%d of %d bytes sent", |
| 1150 | i, get_usb_statmsg(ifd->status), |
| 1151 | ifd->actual_length, ifd->length); |
| 1152 | offset = (ifd->offset + |
| 1153 | ifd->actual_length) |
| 1154 | % BAS_OUTBUFSIZE; |
| 1155 | break; |
| 1156 | } |
| 1157 | } |
| 1158 | #endif |
| 1159 | break; |
| 1160 | case -EPIPE: //FIXME is this the code for "underrun"? |
| 1161 | err("isochronous write stalled"); |
| 1162 | error_hangup(bcs); |
| 1163 | break; |
| 1164 | default: /* severe trouble */ |
| 1165 | warn("isochronous write: %s", |
| 1166 | get_usb_statmsg(urb->status)); |
| 1167 | } |
| 1168 | |
| 1169 | /* mark the write buffer area covered by this URB as free */ |
| 1170 | if (done->limit >= 0) |
| 1171 | atomic_set(&ubc->isooutbuf->read, done->limit); |
| 1172 | |
| 1173 | /* mark URB as free */ |
| 1174 | spin_lock_irqsave(&ubc->isooutlock, flags); |
| 1175 | next = ubc->isooutfree; |
| 1176 | ubc->isooutfree = done; |
| 1177 | spin_unlock_irqrestore(&ubc->isooutlock, flags); |
| 1178 | if (next) { |
| 1179 | /* only one URB still active - resubmit one */ |
| 1180 | if (submit_iso_write_urb(next) <= 0) { |
| 1181 | /* couldn't submit */ |
| 1182 | error_hangup(bcs); |
| 1183 | } |
| 1184 | } |
| 1185 | } |
| 1186 | |
| 1187 | /* process queued SKBs */ |
| 1188 | while ((skb = skb_dequeue(&bcs->squeue))) { |
| 1189 | /* copy to output buffer, doing L2 encapsulation */ |
| 1190 | len = skb->len; |
| 1191 | if (gigaset_isoc_buildframe(bcs, skb->data, len) == -EAGAIN) { |
| 1192 | /* insufficient buffer space, push back onto queue */ |
| 1193 | skb_queue_head(&bcs->squeue, skb); |
| 1194 | dbg(DEBUG_ISO, "%s: skb requeued, qlen=%d", |
| 1195 | __func__, skb_queue_len(&bcs->squeue)); |
| 1196 | break; |
| 1197 | } |
| 1198 | skb_pull(skb, len); |
| 1199 | gigaset_skb_sent(bcs, skb); |
| 1200 | dev_kfree_skb_any(skb); |
| 1201 | } |
| 1202 | } |
| 1203 | |
| 1204 | /* Isochronous Read - Bottom Half */ |
| 1205 | /* ============================== */ |
| 1206 | |
| 1207 | /* read_iso_tasklet |
| 1208 | * tasklet scheduled when an isochronous input URB from the Gigaset device |
| 1209 | * has completed |
| 1210 | * parameter: |
| 1211 | * data B channel state structure |
| 1212 | */ |
| 1213 | static void read_iso_tasklet(unsigned long data) |
| 1214 | { |
| 1215 | struct bc_state *bcs; |
| 1216 | struct bas_bc_state *ubc; |
| 1217 | struct cardstate *cs; |
| 1218 | struct urb *urb; |
| 1219 | char *rcvbuf; |
| 1220 | unsigned long flags; |
| 1221 | int totleft, numbytes, offset, frame, rc; |
| 1222 | |
| 1223 | bcs = (struct bc_state *) data; |
| 1224 | IFNULLRET(bcs); |
| 1225 | ubc = bcs->hw.bas; |
| 1226 | IFNULLRET(ubc); |
| 1227 | cs = bcs->cs; |
| 1228 | IFNULLRET(cs); |
| 1229 | |
| 1230 | /* loop while more completed URBs arrive in the meantime */ |
| 1231 | for (;;) { |
| 1232 | if (!atomic_read(&cs->connected)) { |
| 1233 | warn("%s: disconnected", __func__); |
| 1234 | return; |
| 1235 | } |
| 1236 | |
| 1237 | /* retrieve URB */ |
| 1238 | spin_lock_irqsave(&ubc->isoinlock, flags); |
| 1239 | if (!(urb = ubc->isoindone)) { |
| 1240 | spin_unlock_irqrestore(&ubc->isoinlock, flags); |
| 1241 | return; |
| 1242 | } |
| 1243 | ubc->isoindone = NULL; |
| 1244 | if (unlikely(ubc->loststatus != -EINPROGRESS)) { |
| 1245 | warn("isochronous read overrun, dropped URB with status: %s, %d bytes lost", |
| 1246 | get_usb_statmsg(ubc->loststatus), ubc->isoinlost); |
| 1247 | ubc->loststatus = -EINPROGRESS; |
| 1248 | } |
| 1249 | spin_unlock_irqrestore(&ubc->isoinlock, flags); |
| 1250 | |
| 1251 | if (unlikely(!(atomic_read(&ubc->running)))) { |
| 1252 | dbg(DEBUG_ISO, "%s: channel not running, dropped URB with status: %s", |
| 1253 | __func__, get_usb_statmsg(urb->status)); |
| 1254 | return; |
| 1255 | } |
| 1256 | |
| 1257 | switch (urb->status) { |
| 1258 | case 0: /* normal completion */ |
| 1259 | break; |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame^] | 1260 | case -EXDEV: /* inspect individual frames |
| 1261 | (we do that anyway) */ |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 1262 | dbg(DEBUG_ISO, "%s: URB partially completed", __func__); |
| 1263 | break; |
| 1264 | case -ENOENT: |
| 1265 | case -ECONNRESET: |
| 1266 | dbg(DEBUG_ISO, "%s: URB canceled", __func__); |
| 1267 | continue; /* -> skip */ |
| 1268 | case -EINPROGRESS: /* huh? */ |
| 1269 | dbg(DEBUG_ISO, "%s: URB still pending", __func__); |
| 1270 | continue; /* -> skip */ |
| 1271 | case -EPIPE: |
| 1272 | err("isochronous read stalled"); |
| 1273 | error_hangup(bcs); |
| 1274 | continue; /* -> skip */ |
| 1275 | default: /* severe trouble */ |
| 1276 | warn("isochronous read: %s", |
| 1277 | get_usb_statmsg(urb->status)); |
| 1278 | goto error; |
| 1279 | } |
| 1280 | |
| 1281 | rcvbuf = urb->transfer_buffer; |
| 1282 | totleft = urb->actual_length; |
| 1283 | for (frame = 0; totleft > 0 && frame < BAS_NUMFRAMES; frame++) { |
| 1284 | if (unlikely(urb->iso_frame_desc[frame].status)) { |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame^] | 1285 | warn("isochronous read: frame %d: %s", frame, |
| 1286 | get_usb_statmsg(urb->iso_frame_desc[frame].status)); |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 1287 | break; |
| 1288 | } |
| 1289 | numbytes = urb->iso_frame_desc[frame].actual_length; |
| 1290 | if (unlikely(numbytes > BAS_MAXFRAME)) { |
| 1291 | warn("isochronous read: frame %d: numbytes (%d) > BAS_MAXFRAME", |
| 1292 | frame, numbytes); |
| 1293 | break; |
| 1294 | } |
| 1295 | if (unlikely(numbytes > totleft)) { |
| 1296 | warn("isochronous read: frame %d: numbytes (%d) > totleft (%d)", |
| 1297 | frame, numbytes, totleft); |
| 1298 | break; |
| 1299 | } |
| 1300 | offset = urb->iso_frame_desc[frame].offset; |
| 1301 | if (unlikely(offset + numbytes > BAS_INBUFSIZE)) { |
| 1302 | warn("isochronous read: frame %d: offset (%d) + numbytes (%d) > BAS_INBUFSIZE", |
| 1303 | frame, offset, numbytes); |
| 1304 | break; |
| 1305 | } |
| 1306 | gigaset_isoc_receive(rcvbuf + offset, numbytes, bcs); |
| 1307 | totleft -= numbytes; |
| 1308 | } |
| 1309 | if (unlikely(totleft > 0)) |
| 1310 | warn("isochronous read: %d data bytes missing", |
| 1311 | totleft); |
| 1312 | |
| 1313 | error: |
| 1314 | /* URB processed, resubmit */ |
| 1315 | for (frame = 0; frame < BAS_NUMFRAMES; frame++) { |
| 1316 | urb->iso_frame_desc[frame].status = 0; |
| 1317 | urb->iso_frame_desc[frame].actual_length = 0; |
| 1318 | } |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame^] | 1319 | urb->dev = bcs->cs->hw.bas->udev; /* clobbered by USB subsystem */ |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 1320 | urb->transfer_flags = URB_ISO_ASAP; |
| 1321 | urb->number_of_packets = BAS_NUMFRAMES; |
| 1322 | if ((rc = usb_submit_urb(urb, SLAB_ATOMIC)) != 0) { |
| 1323 | err("could not resubmit isochronous read URB: %s", |
| 1324 | get_usb_statmsg(rc)); |
| 1325 | dump_urb(DEBUG_ISO, "resubmit iso read", urb); |
| 1326 | error_hangup(bcs); |
| 1327 | } |
| 1328 | } |
| 1329 | } |
| 1330 | |
| 1331 | /* Channel Operations */ |
| 1332 | /* ================== */ |
| 1333 | |
| 1334 | /* req_timeout |
| 1335 | * timeout routine for control output request |
| 1336 | * argument: |
| 1337 | * B channel control structure |
| 1338 | */ |
| 1339 | static void req_timeout(unsigned long data) |
| 1340 | { |
| 1341 | struct bc_state *bcs = (struct bc_state *) data; |
| 1342 | struct bas_cardstate *ucs; |
| 1343 | int pending; |
| 1344 | unsigned long flags; |
| 1345 | |
| 1346 | IFNULLRET(bcs); |
| 1347 | IFNULLRET(bcs->cs); |
| 1348 | ucs = bcs->cs->hw.bas; |
| 1349 | IFNULLRET(ucs); |
| 1350 | |
| 1351 | check_pending(ucs); |
| 1352 | |
| 1353 | spin_lock_irqsave(&ucs->lock, flags); |
| 1354 | pending = ucs->pending; |
| 1355 | ucs->pending = 0; |
| 1356 | spin_unlock_irqrestore(&ucs->lock, flags); |
| 1357 | |
| 1358 | switch (pending) { |
| 1359 | case 0: /* no pending request */ |
| 1360 | dbg(DEBUG_USBREQ, "%s: no request pending", __func__); |
| 1361 | break; |
| 1362 | |
| 1363 | case HD_OPEN_ATCHANNEL: |
| 1364 | err("timeout opening AT channel"); |
| 1365 | error_reset(bcs->cs); |
| 1366 | break; |
| 1367 | |
| 1368 | case HD_OPEN_B2CHANNEL: |
| 1369 | case HD_OPEN_B1CHANNEL: |
| 1370 | err("timeout opening channel %d", bcs->channel + 1); |
| 1371 | error_hangup(bcs); |
| 1372 | break; |
| 1373 | |
| 1374 | case HD_CLOSE_ATCHANNEL: |
| 1375 | err("timeout closing AT channel"); |
| 1376 | //wake_up_interruptible(cs->initwait); |
| 1377 | //FIXME need own wait queue? |
| 1378 | break; |
| 1379 | |
| 1380 | case HD_CLOSE_B2CHANNEL: |
| 1381 | case HD_CLOSE_B1CHANNEL: |
| 1382 | err("timeout closing channel %d", bcs->channel + 1); |
| 1383 | break; |
| 1384 | |
| 1385 | default: |
| 1386 | warn("request 0x%02x timed out, clearing", pending); |
| 1387 | } |
| 1388 | } |
| 1389 | |
| 1390 | /* write_ctrl_callback |
| 1391 | * USB completion handler for control pipe output |
| 1392 | * called by the USB subsystem in interrupt context |
| 1393 | * parameter: |
| 1394 | * urb USB request block of completed request |
| 1395 | * urb->context = hardware specific controller state structure |
| 1396 | */ |
| 1397 | static void write_ctrl_callback(struct urb *urb, struct pt_regs *regs) |
| 1398 | { |
| 1399 | struct bas_cardstate *ucs; |
| 1400 | unsigned long flags; |
| 1401 | |
| 1402 | IFNULLRET(urb); |
| 1403 | IFNULLRET(urb->context); |
| 1404 | IFNULLRET(cardstate); |
| 1405 | |
| 1406 | ucs = (struct bas_cardstate *) urb->context; |
| 1407 | spin_lock_irqsave(&ucs->lock, flags); |
| 1408 | if (urb->status && ucs->pending) { |
| 1409 | err("control request 0x%02x failed: %s", |
| 1410 | ucs->pending, get_usb_statmsg(urb->status)); |
| 1411 | del_timer(&ucs->timer_ctrl); |
| 1412 | ucs->pending = 0; |
| 1413 | } |
| 1414 | /* individual handling of specific request types */ |
| 1415 | switch (ucs->pending) { |
| 1416 | case HD_DEVICE_INIT_ACK: /* no reply expected */ |
| 1417 | ucs->pending = 0; |
| 1418 | break; |
| 1419 | } |
| 1420 | spin_unlock_irqrestore(&ucs->lock, flags); |
| 1421 | } |
| 1422 | |
| 1423 | /* req_submit |
| 1424 | * submit a control output request without message buffer to the Gigaset base |
| 1425 | * and optionally start a timeout |
| 1426 | * parameters: |
| 1427 | * bcs B channel control structure |
| 1428 | * req control request code (HD_*) |
| 1429 | * val control request parameter value (set to 0 if unused) |
| 1430 | * timeout timeout in seconds (0: no timeout) |
| 1431 | * return value: |
| 1432 | * 0 on success |
| 1433 | * -EINVAL if a NULL pointer is encountered somewhere |
| 1434 | * -EBUSY if another request is pending |
| 1435 | * any URB submission error code |
| 1436 | */ |
| 1437 | static int req_submit(struct bc_state *bcs, int req, int val, int timeout) |
| 1438 | { |
| 1439 | struct bas_cardstate *ucs; |
| 1440 | int ret; |
| 1441 | unsigned long flags; |
| 1442 | |
| 1443 | IFNULLRETVAL(bcs, -EINVAL); |
| 1444 | IFNULLRETVAL(bcs->cs, -EINVAL); |
| 1445 | ucs = bcs->cs->hw.bas; |
| 1446 | IFNULLRETVAL(ucs, -EINVAL); |
| 1447 | IFNULLRETVAL(ucs->urb_ctrl, -EINVAL); |
| 1448 | |
| 1449 | dbg(DEBUG_USBREQ, "-------> 0x%02x (%d)", req, val); |
| 1450 | |
| 1451 | spin_lock_irqsave(&ucs->lock, flags); |
| 1452 | if (ucs->pending) { |
| 1453 | spin_unlock_irqrestore(&ucs->lock, flags); |
| 1454 | err("submission of request 0x%02x failed: request 0x%02x still pending", |
| 1455 | req, ucs->pending); |
| 1456 | return -EBUSY; |
| 1457 | } |
| 1458 | if (ucs->urb_ctrl->status == -EINPROGRESS) { |
| 1459 | spin_unlock_irqrestore(&ucs->lock, flags); |
| 1460 | err("could not submit request 0x%02x: URB busy", req); |
| 1461 | return -EBUSY; |
| 1462 | } |
| 1463 | |
| 1464 | ucs->dr_ctrl.bRequestType = OUT_VENDOR_REQ; |
| 1465 | ucs->dr_ctrl.bRequest = req; |
| 1466 | ucs->dr_ctrl.wValue = cpu_to_le16(val); |
| 1467 | ucs->dr_ctrl.wIndex = 0; |
| 1468 | ucs->dr_ctrl.wLength = 0; |
| 1469 | usb_fill_control_urb(ucs->urb_ctrl, ucs->udev, |
| 1470 | usb_sndctrlpipe(ucs->udev, 0), |
| 1471 | (unsigned char*) &ucs->dr_ctrl, NULL, 0, |
| 1472 | write_ctrl_callback, ucs); |
| 1473 | if ((ret = usb_submit_urb(ucs->urb_ctrl, SLAB_ATOMIC)) != 0) { |
| 1474 | err("could not submit request 0x%02x: %s", |
| 1475 | req, get_usb_statmsg(ret)); |
| 1476 | spin_unlock_irqrestore(&ucs->lock, flags); |
| 1477 | return ret; |
| 1478 | } |
| 1479 | ucs->pending = req; |
| 1480 | |
| 1481 | if (timeout > 0) { |
| 1482 | dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout); |
| 1483 | ucs->timer_ctrl.expires = jiffies + timeout * HZ / 10; |
| 1484 | ucs->timer_ctrl.data = (unsigned long) bcs; |
| 1485 | ucs->timer_ctrl.function = req_timeout; |
| 1486 | add_timer(&ucs->timer_ctrl); |
| 1487 | } |
| 1488 | |
| 1489 | spin_unlock_irqrestore(&ucs->lock, flags); |
| 1490 | return 0; |
| 1491 | } |
| 1492 | |
| 1493 | /* gigaset_init_bchannel |
| 1494 | * called by common.c to connect a B channel |
| 1495 | * initialize isochronous I/O and tell the Gigaset base to open the channel |
| 1496 | * argument: |
| 1497 | * B channel control structure |
| 1498 | * return value: |
| 1499 | * 0 on success, error code < 0 on error |
| 1500 | */ |
| 1501 | static int gigaset_init_bchannel(struct bc_state *bcs) |
| 1502 | { |
| 1503 | int req, ret; |
| 1504 | |
| 1505 | IFNULLRETVAL(bcs, -EINVAL); |
| 1506 | |
| 1507 | if ((ret = starturbs(bcs)) < 0) { |
| 1508 | err("could not start isochronous I/O for channel %d", |
| 1509 | bcs->channel + 1); |
| 1510 | error_hangup(bcs); |
| 1511 | return ret; |
| 1512 | } |
| 1513 | |
| 1514 | req = bcs->channel ? HD_OPEN_B2CHANNEL : HD_OPEN_B1CHANNEL; |
| 1515 | if ((ret = req_submit(bcs, req, 0, BAS_TIMEOUT)) < 0) { |
| 1516 | err("could not open channel %d: %s", |
| 1517 | bcs->channel + 1, get_usb_statmsg(ret)); |
| 1518 | stopurbs(bcs->hw.bas); |
| 1519 | error_hangup(bcs); |
| 1520 | } |
| 1521 | return ret; |
| 1522 | } |
| 1523 | |
| 1524 | /* gigaset_close_bchannel |
| 1525 | * called by common.c to disconnect a B channel |
| 1526 | * tell the Gigaset base to close the channel |
| 1527 | * stopping isochronous I/O and LL notification will be done when the |
| 1528 | * acknowledgement for the close arrives |
| 1529 | * argument: |
| 1530 | * B channel control structure |
| 1531 | * return value: |
| 1532 | * 0 on success, error code < 0 on error |
| 1533 | */ |
| 1534 | static int gigaset_close_bchannel(struct bc_state *bcs) |
| 1535 | { |
| 1536 | int req, ret; |
| 1537 | |
| 1538 | IFNULLRETVAL(bcs, -EINVAL); |
| 1539 | |
| 1540 | if (!(atomic_read(&bcs->cs->hw.bas->basstate) & |
| 1541 | (bcs->channel ? BS_B2OPEN : BS_B1OPEN))) { |
| 1542 | /* channel not running: just signal common.c */ |
| 1543 | gigaset_bchannel_down(bcs); |
| 1544 | return 0; |
| 1545 | } |
| 1546 | |
| 1547 | req = bcs->channel ? HD_CLOSE_B2CHANNEL : HD_CLOSE_B1CHANNEL; |
| 1548 | if ((ret = req_submit(bcs, req, 0, BAS_TIMEOUT)) < 0) |
| 1549 | err("could not submit HD_CLOSE_BxCHANNEL request: %s", |
| 1550 | get_usb_statmsg(ret)); |
| 1551 | return ret; |
| 1552 | } |
| 1553 | |
| 1554 | /* Device Operations */ |
| 1555 | /* ================= */ |
| 1556 | |
| 1557 | /* complete_cb |
| 1558 | * unqueue first command buffer from queue, waking any sleepers |
| 1559 | * must be called with cs->cmdlock held |
| 1560 | * parameter: |
| 1561 | * cs controller state structure |
| 1562 | */ |
| 1563 | static void complete_cb(struct cardstate *cs) |
| 1564 | { |
| 1565 | struct cmdbuf_t *cb; |
| 1566 | |
| 1567 | IFNULLRET(cs); |
| 1568 | cb = cs->cmdbuf; |
| 1569 | IFNULLRET(cb); |
| 1570 | |
| 1571 | /* unqueue completed buffer */ |
| 1572 | cs->cmdbytes -= cs->curlen; |
| 1573 | dbg(DEBUG_TRANSCMD | DEBUG_LOCKCMD, |
| 1574 | "write_command: sent %u bytes, %u left", |
| 1575 | cs->curlen, cs->cmdbytes); |
| 1576 | if ((cs->cmdbuf = cb->next) != NULL) { |
| 1577 | cs->cmdbuf->prev = NULL; |
| 1578 | cs->curlen = cs->cmdbuf->len; |
| 1579 | } else { |
| 1580 | cs->lastcmdbuf = NULL; |
| 1581 | cs->curlen = 0; |
| 1582 | } |
| 1583 | |
| 1584 | if (cb->wake_tasklet) |
| 1585 | tasklet_schedule(cb->wake_tasklet); |
| 1586 | |
| 1587 | kfree(cb); |
| 1588 | } |
| 1589 | |
| 1590 | static int atwrite_submit(struct cardstate *cs, unsigned char *buf, int len); |
| 1591 | |
| 1592 | /* write_command_callback |
| 1593 | * USB completion handler for AT command transmission |
| 1594 | * called by the USB subsystem in interrupt context |
| 1595 | * parameter: |
| 1596 | * urb USB request block of completed request |
| 1597 | * urb->context = controller state structure |
| 1598 | */ |
| 1599 | static void write_command_callback(struct urb *urb, struct pt_regs *regs) |
| 1600 | { |
| 1601 | struct cardstate *cs; |
| 1602 | unsigned long flags; |
| 1603 | struct bas_cardstate *ucs; |
| 1604 | |
| 1605 | IFNULLRET(urb); |
| 1606 | cs = (struct cardstate *) urb->context; |
| 1607 | IFNULLRET(cs); |
| 1608 | ucs = cs->hw.bas; |
| 1609 | IFNULLRET(ucs); |
| 1610 | |
| 1611 | /* check status */ |
| 1612 | switch (urb->status) { |
| 1613 | case 0: /* normal completion */ |
| 1614 | break; |
| 1615 | case -ENOENT: /* canceled */ |
| 1616 | case -ECONNRESET: /* canceled (async) */ |
| 1617 | case -EINPROGRESS: /* pending */ |
| 1618 | /* ignore silently */ |
| 1619 | dbg(DEBUG_USBREQ, |
| 1620 | "%s: %s", __func__, get_usb_statmsg(urb->status)); |
| 1621 | return; |
| 1622 | default: /* any failure */ |
| 1623 | if (++ucs->retry_cmd_out > BAS_RETRY) { |
| 1624 | warn("command write: %s, giving up after %d retries", |
| 1625 | get_usb_statmsg(urb->status), ucs->retry_cmd_out); |
| 1626 | break; |
| 1627 | } |
| 1628 | if (cs->cmdbuf == NULL) { |
| 1629 | warn("command write: %s, cannot retry - cmdbuf gone", |
| 1630 | get_usb_statmsg(urb->status)); |
| 1631 | break; |
| 1632 | } |
| 1633 | notice("command write: %s, retry %d", |
| 1634 | get_usb_statmsg(urb->status), ucs->retry_cmd_out); |
| 1635 | if (atwrite_submit(cs, cs->cmdbuf->buf, cs->cmdbuf->len) >= 0) |
| 1636 | /* resubmitted - bypass regular exit block */ |
| 1637 | return; |
| 1638 | /* command send failed, assume base still waiting */ |
| 1639 | update_basstate(ucs, BS_ATREADY, 0); |
| 1640 | } |
| 1641 | |
| 1642 | spin_lock_irqsave(&cs->cmdlock, flags); |
| 1643 | if (cs->cmdbuf != NULL) |
| 1644 | complete_cb(cs); |
| 1645 | spin_unlock_irqrestore(&cs->cmdlock, flags); |
| 1646 | } |
| 1647 | |
| 1648 | /* atrdy_timeout |
| 1649 | * timeout routine for AT command transmission |
| 1650 | * argument: |
| 1651 | * controller state structure |
| 1652 | */ |
| 1653 | static void atrdy_timeout(unsigned long data) |
| 1654 | { |
| 1655 | struct cardstate *cs = (struct cardstate *) data; |
| 1656 | struct bas_cardstate *ucs; |
| 1657 | |
| 1658 | IFNULLRET(cs); |
| 1659 | ucs = cs->hw.bas; |
| 1660 | IFNULLRET(ucs); |
| 1661 | |
| 1662 | warn("timeout waiting for HD_READY_SEND_ATDATA"); |
| 1663 | |
| 1664 | /* fake the missing signal - what else can I do? */ |
| 1665 | update_basstate(ucs, BS_ATREADY, BS_ATTIMER); |
| 1666 | start_cbsend(cs); |
| 1667 | } |
| 1668 | |
| 1669 | /* atwrite_submit |
| 1670 | * submit an HD_WRITE_ATMESSAGE command URB |
| 1671 | * parameters: |
| 1672 | * cs controller state structure |
| 1673 | * buf buffer containing command to send |
| 1674 | * len length of command to send |
| 1675 | * return value: |
| 1676 | * 0 on success |
| 1677 | * -EFAULT if a NULL pointer is encountered somewhere |
| 1678 | * -EBUSY if another request is pending |
| 1679 | * any URB submission error code |
| 1680 | */ |
| 1681 | static int atwrite_submit(struct cardstate *cs, unsigned char *buf, int len) |
| 1682 | { |
| 1683 | struct bas_cardstate *ucs; |
| 1684 | int ret; |
| 1685 | |
| 1686 | IFNULLRETVAL(cs, -EFAULT); |
| 1687 | ucs = cs->hw.bas; |
| 1688 | IFNULLRETVAL(ucs, -EFAULT); |
| 1689 | IFNULLRETVAL(ucs->urb_cmd_out, -EFAULT); |
| 1690 | |
| 1691 | dbg(DEBUG_USBREQ, "-------> HD_WRITE_ATMESSAGE (%d)", len); |
| 1692 | |
| 1693 | if (ucs->urb_cmd_out->status == -EINPROGRESS) { |
| 1694 | err("could not submit HD_WRITE_ATMESSAGE: URB busy"); |
| 1695 | return -EBUSY; |
| 1696 | } |
| 1697 | |
| 1698 | ucs->dr_cmd_out.bRequestType = OUT_VENDOR_REQ; |
| 1699 | ucs->dr_cmd_out.bRequest = HD_WRITE_ATMESSAGE; |
| 1700 | ucs->dr_cmd_out.wValue = 0; |
| 1701 | ucs->dr_cmd_out.wIndex = 0; |
| 1702 | ucs->dr_cmd_out.wLength = cpu_to_le16(len); |
| 1703 | usb_fill_control_urb(ucs->urb_cmd_out, ucs->udev, |
| 1704 | usb_sndctrlpipe(ucs->udev, 0), |
| 1705 | (unsigned char*) &ucs->dr_cmd_out, buf, len, |
| 1706 | write_command_callback, cs); |
| 1707 | |
| 1708 | if ((ret = usb_submit_urb(ucs->urb_cmd_out, SLAB_ATOMIC)) != 0) { |
| 1709 | err("could not submit HD_WRITE_ATMESSAGE: %s", |
| 1710 | get_usb_statmsg(ret)); |
| 1711 | return ret; |
| 1712 | } |
| 1713 | |
| 1714 | /* submitted successfully */ |
| 1715 | update_basstate(ucs, 0, BS_ATREADY); |
| 1716 | |
| 1717 | /* start timeout if necessary */ |
| 1718 | if (!(atomic_read(&ucs->basstate) & BS_ATTIMER)) { |
| 1719 | dbg(DEBUG_OUTPUT, |
| 1720 | "setting ATREADY timeout of %d/10 secs", ATRDY_TIMEOUT); |
| 1721 | ucs->timer_atrdy.expires = jiffies + ATRDY_TIMEOUT * HZ / 10; |
| 1722 | ucs->timer_atrdy.data = (unsigned long) cs; |
| 1723 | ucs->timer_atrdy.function = atrdy_timeout; |
| 1724 | add_timer(&ucs->timer_atrdy); |
| 1725 | update_basstate(ucs, BS_ATTIMER, 0); |
| 1726 | } |
| 1727 | return 0; |
| 1728 | } |
| 1729 | |
| 1730 | /* start_cbsend |
| 1731 | * start transmission of AT command queue if necessary |
| 1732 | * parameter: |
| 1733 | * cs controller state structure |
| 1734 | * return value: |
| 1735 | * 0 on success |
| 1736 | * error code < 0 on error |
| 1737 | */ |
| 1738 | static int start_cbsend(struct cardstate *cs) |
| 1739 | { |
| 1740 | struct cmdbuf_t *cb; |
| 1741 | struct bas_cardstate *ucs; |
| 1742 | unsigned long flags; |
| 1743 | int rc; |
| 1744 | int retval = 0; |
| 1745 | |
| 1746 | IFNULLRETVAL(cs, -EFAULT); |
| 1747 | ucs = cs->hw.bas; |
| 1748 | IFNULLRETVAL(ucs, -EFAULT); |
| 1749 | |
| 1750 | /* check if AT channel is open */ |
| 1751 | if (!(atomic_read(&ucs->basstate) & BS_ATOPEN)) { |
| 1752 | dbg(DEBUG_TRANSCMD | DEBUG_LOCKCMD, "AT channel not open"); |
| 1753 | rc = req_submit(cs->bcs, HD_OPEN_ATCHANNEL, 0, BAS_TIMEOUT); |
| 1754 | if (rc < 0) { |
| 1755 | err("could not open AT channel"); |
| 1756 | /* flush command queue */ |
| 1757 | spin_lock_irqsave(&cs->cmdlock, flags); |
| 1758 | while (cs->cmdbuf != NULL) |
| 1759 | complete_cb(cs); |
| 1760 | spin_unlock_irqrestore(&cs->cmdlock, flags); |
| 1761 | } |
| 1762 | return rc; |
| 1763 | } |
| 1764 | |
| 1765 | /* try to send first command in queue */ |
| 1766 | spin_lock_irqsave(&cs->cmdlock, flags); |
| 1767 | |
| 1768 | while ((cb = cs->cmdbuf) != NULL && |
| 1769 | atomic_read(&ucs->basstate) & BS_ATREADY) { |
| 1770 | ucs->retry_cmd_out = 0; |
| 1771 | rc = atwrite_submit(cs, cb->buf, cb->len); |
| 1772 | if (unlikely(rc)) { |
| 1773 | retval = rc; |
| 1774 | complete_cb(cs); |
| 1775 | } |
| 1776 | } |
| 1777 | |
| 1778 | spin_unlock_irqrestore(&cs->cmdlock, flags); |
| 1779 | return retval; |
| 1780 | } |
| 1781 | |
| 1782 | /* gigaset_write_cmd |
| 1783 | * This function is called by the device independent part of the driver |
| 1784 | * to transmit an AT command string to the Gigaset device. |
| 1785 | * It encapsulates the device specific method for transmission over the |
| 1786 | * direct USB connection to the base. |
| 1787 | * The command string is added to the queue of commands to send, and |
| 1788 | * USB transmission is started if necessary. |
| 1789 | * parameters: |
| 1790 | * cs controller state structure |
| 1791 | * buf command string to send |
| 1792 | * len number of bytes to send (max. IF_WRITEBUF) |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame^] | 1793 | * wake_tasklet tasklet to run when transmission is completed |
| 1794 | * (NULL if none) |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 1795 | * return value: |
| 1796 | * number of bytes queued on success |
| 1797 | * error code < 0 on error |
| 1798 | */ |
| 1799 | static int gigaset_write_cmd(struct cardstate *cs, |
| 1800 | const unsigned char *buf, int len, |
| 1801 | struct tasklet_struct *wake_tasklet) |
| 1802 | { |
| 1803 | struct cmdbuf_t *cb; |
| 1804 | unsigned long flags; |
| 1805 | int status; |
| 1806 | |
| 1807 | gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ? |
| 1808 | DEBUG_TRANSCMD : DEBUG_LOCKCMD, |
| 1809 | "CMD Transmit", len, buf, 0); |
| 1810 | |
| 1811 | if (!atomic_read(&cs->connected)) { |
| 1812 | err("%s: not connected", __func__); |
| 1813 | return -ENODEV; |
| 1814 | } |
| 1815 | |
| 1816 | if (len <= 0) |
| 1817 | return 0; /* nothing to do */ |
| 1818 | |
| 1819 | if (len > IF_WRITEBUF) |
| 1820 | len = IF_WRITEBUF; |
| 1821 | if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) { |
| 1822 | err("%s: out of memory", __func__); |
| 1823 | return -ENOMEM; |
| 1824 | } |
| 1825 | |
| 1826 | memcpy(cb->buf, buf, len); |
| 1827 | cb->len = len; |
| 1828 | cb->offset = 0; |
| 1829 | cb->next = NULL; |
| 1830 | cb->wake_tasklet = wake_tasklet; |
| 1831 | |
| 1832 | spin_lock_irqsave(&cs->cmdlock, flags); |
| 1833 | cb->prev = cs->lastcmdbuf; |
| 1834 | if (cs->lastcmdbuf) |
| 1835 | cs->lastcmdbuf->next = cb; |
| 1836 | else { |
| 1837 | cs->cmdbuf = cb; |
| 1838 | cs->curlen = len; |
| 1839 | } |
| 1840 | cs->cmdbytes += len; |
| 1841 | cs->lastcmdbuf = cb; |
| 1842 | spin_unlock_irqrestore(&cs->cmdlock, flags); |
| 1843 | |
| 1844 | status = start_cbsend(cs); |
| 1845 | |
| 1846 | return status < 0 ? status : len; |
| 1847 | } |
| 1848 | |
| 1849 | /* gigaset_write_room |
| 1850 | * tty_driver.write_room interface routine |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame^] | 1851 | * return number of characters the driver will accept to be written via |
| 1852 | * gigaset_write_cmd |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 1853 | * parameter: |
| 1854 | * controller state structure |
| 1855 | * return value: |
| 1856 | * number of characters |
| 1857 | */ |
| 1858 | static int gigaset_write_room(struct cardstate *cs) |
| 1859 | { |
| 1860 | return IF_WRITEBUF; |
| 1861 | } |
| 1862 | |
| 1863 | /* gigaset_chars_in_buffer |
| 1864 | * tty_driver.chars_in_buffer interface routine |
| 1865 | * return number of characters waiting to be sent |
| 1866 | * parameter: |
| 1867 | * controller state structure |
| 1868 | * return value: |
| 1869 | * number of characters |
| 1870 | */ |
| 1871 | static int gigaset_chars_in_buffer(struct cardstate *cs) |
| 1872 | { |
| 1873 | unsigned long flags; |
| 1874 | unsigned bytes; |
| 1875 | |
| 1876 | spin_lock_irqsave(&cs->cmdlock, flags); |
| 1877 | bytes = cs->cmdbytes; |
| 1878 | spin_unlock_irqrestore(&cs->cmdlock, flags); |
| 1879 | |
| 1880 | return bytes; |
| 1881 | } |
| 1882 | |
| 1883 | /* gigaset_brkchars |
| 1884 | * implementation of ioctl(GIGASET_BRKCHARS) |
| 1885 | * parameter: |
| 1886 | * controller state structure |
| 1887 | * return value: |
| 1888 | * -EINVAL (unimplemented function) |
| 1889 | */ |
| 1890 | static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6]) |
| 1891 | { |
| 1892 | return -EINVAL; |
| 1893 | } |
| 1894 | |
| 1895 | |
| 1896 | /* Device Initialization/Shutdown */ |
| 1897 | /* ============================== */ |
| 1898 | |
| 1899 | /* Free hardware dependent part of the B channel structure |
| 1900 | * parameter: |
| 1901 | * bcs B channel structure |
| 1902 | * return value: |
| 1903 | * !=0 on success |
| 1904 | */ |
| 1905 | static int gigaset_freebcshw(struct bc_state *bcs) |
| 1906 | { |
| 1907 | if (!bcs->hw.bas) |
| 1908 | return 0; |
| 1909 | |
| 1910 | if (bcs->hw.bas->isooutbuf) |
| 1911 | kfree(bcs->hw.bas->isooutbuf); |
| 1912 | kfree(bcs->hw.bas); |
| 1913 | bcs->hw.bas = NULL; |
| 1914 | return 1; |
| 1915 | } |
| 1916 | |
| 1917 | /* Initialize hardware dependent part of the B channel structure |
| 1918 | * parameter: |
| 1919 | * bcs B channel structure |
| 1920 | * return value: |
| 1921 | * !=0 on success |
| 1922 | */ |
| 1923 | static int gigaset_initbcshw(struct bc_state *bcs) |
| 1924 | { |
| 1925 | int i; |
| 1926 | struct bas_bc_state *ubc; |
| 1927 | |
| 1928 | bcs->hw.bas = ubc = kmalloc(sizeof(struct bas_bc_state), GFP_KERNEL); |
| 1929 | if (!ubc) { |
| 1930 | err("could not allocate bas_bc_state"); |
| 1931 | return 0; |
| 1932 | } |
| 1933 | |
| 1934 | atomic_set(&ubc->running, 0); |
| 1935 | atomic_set(&ubc->corrbytes, 0); |
| 1936 | spin_lock_init(&ubc->isooutlock); |
| 1937 | for (i = 0; i < BAS_OUTURBS; ++i) { |
| 1938 | ubc->isoouturbs[i].urb = NULL; |
| 1939 | ubc->isoouturbs[i].bcs = bcs; |
| 1940 | } |
| 1941 | ubc->isooutdone = ubc->isooutfree = ubc->isooutovfl = NULL; |
| 1942 | ubc->numsub = 0; |
| 1943 | if (!(ubc->isooutbuf = kmalloc(sizeof(struct isowbuf_t), GFP_KERNEL))) { |
| 1944 | err("could not allocate isochronous output buffer"); |
| 1945 | kfree(ubc); |
| 1946 | bcs->hw.bas = NULL; |
| 1947 | return 0; |
| 1948 | } |
| 1949 | tasklet_init(&ubc->sent_tasklet, |
| 1950 | &write_iso_tasklet, (unsigned long) bcs); |
| 1951 | |
| 1952 | spin_lock_init(&ubc->isoinlock); |
| 1953 | for (i = 0; i < BAS_INURBS; ++i) |
| 1954 | ubc->isoinurbs[i] = NULL; |
| 1955 | ubc->isoindone = NULL; |
| 1956 | ubc->loststatus = -EINPROGRESS; |
| 1957 | ubc->isoinlost = 0; |
| 1958 | ubc->seqlen = 0; |
| 1959 | ubc->inbyte = 0; |
| 1960 | ubc->inbits = 0; |
| 1961 | ubc->goodbytes = 0; |
| 1962 | ubc->alignerrs = 0; |
| 1963 | ubc->fcserrs = 0; |
| 1964 | ubc->frameerrs = 0; |
| 1965 | ubc->giants = 0; |
| 1966 | ubc->runts = 0; |
| 1967 | ubc->aborts = 0; |
| 1968 | ubc->shared0s = 0; |
| 1969 | ubc->stolen0s = 0; |
| 1970 | tasklet_init(&ubc->rcvd_tasklet, |
| 1971 | &read_iso_tasklet, (unsigned long) bcs); |
| 1972 | return 1; |
| 1973 | } |
| 1974 | |
| 1975 | static void gigaset_reinitbcshw(struct bc_state *bcs) |
| 1976 | { |
| 1977 | struct bas_bc_state *ubc = bcs->hw.bas; |
| 1978 | |
| 1979 | atomic_set(&bcs->hw.bas->running, 0); |
| 1980 | atomic_set(&bcs->hw.bas->corrbytes, 0); |
| 1981 | bcs->hw.bas->numsub = 0; |
| 1982 | spin_lock_init(&ubc->isooutlock); |
| 1983 | spin_lock_init(&ubc->isoinlock); |
| 1984 | ubc->loststatus = -EINPROGRESS; |
| 1985 | } |
| 1986 | |
| 1987 | static void gigaset_freecshw(struct cardstate *cs) |
| 1988 | { |
| 1989 | struct bas_cardstate *ucs = cs->hw.bas; |
| 1990 | |
| 1991 | del_timer(&ucs->timer_ctrl); |
| 1992 | del_timer(&ucs->timer_atrdy); |
| 1993 | del_timer(&ucs->timer_cmd_in); |
| 1994 | |
| 1995 | kfree(cs->hw.bas); |
| 1996 | } |
| 1997 | |
| 1998 | static int gigaset_initcshw(struct cardstate *cs) |
| 1999 | { |
| 2000 | struct bas_cardstate *ucs; |
| 2001 | |
| 2002 | cs->hw.bas = ucs = kmalloc(sizeof *ucs, GFP_KERNEL); |
| 2003 | if (!ucs) |
| 2004 | return 0; |
| 2005 | |
| 2006 | ucs->urb_cmd_in = NULL; |
| 2007 | ucs->urb_cmd_out = NULL; |
| 2008 | ucs->rcvbuf = NULL; |
| 2009 | ucs->rcvbuf_size = 0; |
| 2010 | |
| 2011 | spin_lock_init(&ucs->lock); |
| 2012 | ucs->pending = 0; |
| 2013 | |
| 2014 | atomic_set(&ucs->basstate, 0); |
| 2015 | init_timer(&ucs->timer_ctrl); |
| 2016 | init_timer(&ucs->timer_atrdy); |
| 2017 | init_timer(&ucs->timer_cmd_in); |
| 2018 | |
| 2019 | return 1; |
| 2020 | } |
| 2021 | |
| 2022 | /* freeurbs |
| 2023 | * unlink and deallocate all URBs unconditionally |
| 2024 | * caller must make sure that no commands are still in progress |
| 2025 | * parameter: |
| 2026 | * cs controller state structure |
| 2027 | */ |
| 2028 | static void freeurbs(struct cardstate *cs) |
| 2029 | { |
| 2030 | struct bas_cardstate *ucs; |
| 2031 | struct bas_bc_state *ubc; |
| 2032 | int i, j; |
| 2033 | |
| 2034 | IFNULLRET(cs); |
| 2035 | ucs = cs->hw.bas; |
| 2036 | IFNULLRET(ucs); |
| 2037 | |
| 2038 | for (j = 0; j < 2; ++j) { |
| 2039 | ubc = cs->bcs[j].hw.bas; |
| 2040 | IFNULLCONT(ubc); |
| 2041 | for (i = 0; i < BAS_OUTURBS; ++i) |
| 2042 | if (ubc->isoouturbs[i].urb) { |
| 2043 | usb_kill_urb(ubc->isoouturbs[i].urb); |
| 2044 | dbg(DEBUG_INIT, |
| 2045 | "%s: isoc output URB %d/%d unlinked", |
| 2046 | __func__, j, i); |
| 2047 | usb_free_urb(ubc->isoouturbs[i].urb); |
| 2048 | ubc->isoouturbs[i].urb = NULL; |
| 2049 | } |
| 2050 | for (i = 0; i < BAS_INURBS; ++i) |
| 2051 | if (ubc->isoinurbs[i]) { |
| 2052 | usb_kill_urb(ubc->isoinurbs[i]); |
| 2053 | dbg(DEBUG_INIT, |
| 2054 | "%s: isoc input URB %d/%d unlinked", |
| 2055 | __func__, j, i); |
| 2056 | usb_free_urb(ubc->isoinurbs[i]); |
| 2057 | ubc->isoinurbs[i] = NULL; |
| 2058 | } |
| 2059 | } |
| 2060 | if (ucs->urb_int_in) { |
| 2061 | usb_kill_urb(ucs->urb_int_in); |
| 2062 | dbg(DEBUG_INIT, "%s: interrupt input URB unlinked", __func__); |
| 2063 | usb_free_urb(ucs->urb_int_in); |
| 2064 | ucs->urb_int_in = NULL; |
| 2065 | } |
| 2066 | if (ucs->urb_cmd_out) { |
| 2067 | usb_kill_urb(ucs->urb_cmd_out); |
| 2068 | dbg(DEBUG_INIT, "%s: command output URB unlinked", __func__); |
| 2069 | usb_free_urb(ucs->urb_cmd_out); |
| 2070 | ucs->urb_cmd_out = NULL; |
| 2071 | } |
| 2072 | if (ucs->urb_cmd_in) { |
| 2073 | usb_kill_urb(ucs->urb_cmd_in); |
| 2074 | dbg(DEBUG_INIT, "%s: command input URB unlinked", __func__); |
| 2075 | usb_free_urb(ucs->urb_cmd_in); |
| 2076 | ucs->urb_cmd_in = NULL; |
| 2077 | } |
| 2078 | if (ucs->urb_ctrl) { |
| 2079 | usb_kill_urb(ucs->urb_ctrl); |
| 2080 | dbg(DEBUG_INIT, "%s: control output URB unlinked", __func__); |
| 2081 | usb_free_urb(ucs->urb_ctrl); |
| 2082 | ucs->urb_ctrl = NULL; |
| 2083 | } |
| 2084 | } |
| 2085 | |
| 2086 | /* gigaset_probe |
| 2087 | * This function is called when a new USB device is connected. |
| 2088 | * It checks whether the new device is handled by this driver. |
| 2089 | */ |
| 2090 | static int gigaset_probe(struct usb_interface *interface, |
| 2091 | const struct usb_device_id *id) |
| 2092 | { |
| 2093 | struct usb_host_interface *hostif; |
| 2094 | struct usb_device *udev = interface_to_usbdev(interface); |
| 2095 | struct cardstate *cs = NULL; |
| 2096 | struct bas_cardstate *ucs = NULL; |
| 2097 | struct bas_bc_state *ubc; |
| 2098 | struct usb_endpoint_descriptor *endpoint; |
| 2099 | int i, j; |
| 2100 | int ret; |
| 2101 | |
| 2102 | IFNULLRETVAL(udev, -ENODEV); |
| 2103 | |
| 2104 | dbg(DEBUG_ANY, |
| 2105 | "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)", |
| 2106 | __func__, le16_to_cpu(udev->descriptor.idVendor), |
| 2107 | le16_to_cpu(udev->descriptor.idProduct)); |
| 2108 | |
| 2109 | /* See if the device offered us matches what we can accept */ |
| 2110 | if ((le16_to_cpu(udev->descriptor.idVendor) != USB_GIGA_VENDOR_ID) || |
| 2111 | (le16_to_cpu(udev->descriptor.idProduct) != USB_GIGA_PRODUCT_ID && |
| 2112 | le16_to_cpu(udev->descriptor.idProduct) != USB_4175_PRODUCT_ID && |
| 2113 | le16_to_cpu(udev->descriptor.idProduct) != USB_SX303_PRODUCT_ID && |
| 2114 | le16_to_cpu(udev->descriptor.idProduct) != USB_SX353_PRODUCT_ID)) { |
| 2115 | dbg(DEBUG_ANY, "%s: unmatched ID - exiting", __func__); |
| 2116 | return -ENODEV; |
| 2117 | } |
| 2118 | |
| 2119 | /* set required alternate setting */ |
| 2120 | hostif = interface->cur_altsetting; |
| 2121 | if (hostif->desc.bAlternateSetting != 3) { |
| 2122 | dbg(DEBUG_ANY, |
| 2123 | "%s: wrong alternate setting %d - trying to switch", |
| 2124 | __func__, hostif->desc.bAlternateSetting); |
| 2125 | if (usb_set_interface(udev, hostif->desc.bInterfaceNumber, 3) < 0) { |
| 2126 | warn("usb_set_interface failed, device %d interface %d altsetting %d", |
| 2127 | udev->devnum, hostif->desc.bInterfaceNumber, |
| 2128 | hostif->desc.bAlternateSetting); |
| 2129 | return -ENODEV; |
| 2130 | } |
| 2131 | hostif = interface->cur_altsetting; |
| 2132 | } |
| 2133 | |
| 2134 | /* Reject application specific interfaces |
| 2135 | */ |
| 2136 | if (hostif->desc.bInterfaceClass != 255) { |
| 2137 | warn("%s: bInterfaceClass == %d", |
| 2138 | __func__, hostif->desc.bInterfaceClass); |
| 2139 | return -ENODEV; |
| 2140 | } |
| 2141 | |
| 2142 | info("%s: Device matched (Vendor: 0x%x, Product: 0x%x)", |
| 2143 | __func__, le16_to_cpu(udev->descriptor.idVendor), |
| 2144 | le16_to_cpu(udev->descriptor.idProduct)); |
| 2145 | |
| 2146 | cs = gigaset_getunassignedcs(driver); |
| 2147 | if (!cs) { |
| 2148 | err("%s: no free cardstate", __func__); |
| 2149 | return -ENODEV; |
| 2150 | } |
| 2151 | ucs = cs->hw.bas; |
| 2152 | ucs->udev = udev; |
| 2153 | ucs->interface = interface; |
| 2154 | |
| 2155 | /* allocate URBs: |
| 2156 | * - one for the interrupt pipe |
| 2157 | * - three for the different uses of the default control pipe |
| 2158 | * - three for each isochronous pipe |
| 2159 | */ |
| 2160 | ucs->urb_int_in = usb_alloc_urb(0, SLAB_KERNEL); |
| 2161 | if (!ucs->urb_int_in) { |
| 2162 | err("No free urbs available"); |
| 2163 | goto error; |
| 2164 | } |
| 2165 | ucs->urb_cmd_in = usb_alloc_urb(0, SLAB_KERNEL); |
| 2166 | if (!ucs->urb_cmd_in) { |
| 2167 | err("No free urbs available"); |
| 2168 | goto error; |
| 2169 | } |
| 2170 | ucs->urb_cmd_out = usb_alloc_urb(0, SLAB_KERNEL); |
| 2171 | if (!ucs->urb_cmd_out) { |
| 2172 | err("No free urbs available"); |
| 2173 | goto error; |
| 2174 | } |
| 2175 | ucs->urb_ctrl = usb_alloc_urb(0, SLAB_KERNEL); |
| 2176 | if (!ucs->urb_ctrl) { |
| 2177 | err("No free urbs available"); |
| 2178 | goto error; |
| 2179 | } |
| 2180 | |
| 2181 | for (j = 0; j < 2; ++j) { |
| 2182 | ubc = cs->bcs[j].hw.bas; |
| 2183 | for (i = 0; i < BAS_OUTURBS; ++i) { |
| 2184 | ubc->isoouturbs[i].urb = |
| 2185 | usb_alloc_urb(BAS_NUMFRAMES, SLAB_KERNEL); |
| 2186 | if (!ubc->isoouturbs[i].urb) { |
| 2187 | err("No free urbs available"); |
| 2188 | goto error; |
| 2189 | } |
| 2190 | } |
| 2191 | for (i = 0; i < BAS_INURBS; ++i) { |
| 2192 | ubc->isoinurbs[i] = |
| 2193 | usb_alloc_urb(BAS_NUMFRAMES, SLAB_KERNEL); |
| 2194 | if (!ubc->isoinurbs[i]) { |
| 2195 | err("No free urbs available"); |
| 2196 | goto error; |
| 2197 | } |
| 2198 | } |
| 2199 | } |
| 2200 | |
| 2201 | ucs->rcvbuf = NULL; |
| 2202 | ucs->rcvbuf_size = 0; |
| 2203 | |
| 2204 | /* Fill the interrupt urb and send it to the core */ |
| 2205 | endpoint = &hostif->endpoint[0].desc; |
| 2206 | usb_fill_int_urb(ucs->urb_int_in, udev, |
| 2207 | usb_rcvintpipe(udev, |
| 2208 | (endpoint->bEndpointAddress) & 0x0f), |
| 2209 | ucs->int_in_buf, 3, read_int_callback, cs, |
| 2210 | endpoint->bInterval); |
| 2211 | ret = usb_submit_urb(ucs->urb_int_in, SLAB_KERNEL); |
| 2212 | if (ret) { |
| 2213 | err("could not submit interrupt URB: %s", get_usb_statmsg(ret)); |
| 2214 | goto error; |
| 2215 | } |
| 2216 | |
| 2217 | /* tell the device that the driver is ready */ |
| 2218 | if ((ret = req_submit(cs->bcs, HD_DEVICE_INIT_ACK, 0, 0)) != 0) |
| 2219 | goto error; |
| 2220 | |
| 2221 | /* tell common part that the device is ready */ |
| 2222 | if (startmode == SM_LOCKED) |
| 2223 | atomic_set(&cs->mstate, MS_LOCKED); |
| 2224 | if (!gigaset_start(cs)) |
| 2225 | goto error; |
| 2226 | |
| 2227 | /* save address of controller structure */ |
| 2228 | usb_set_intfdata(interface, cs); |
| 2229 | |
| 2230 | /* set up device sysfs */ |
| 2231 | gigaset_init_dev_sysfs(interface); |
| 2232 | return 0; |
| 2233 | |
| 2234 | error: |
| 2235 | freeurbs(cs); |
| 2236 | gigaset_unassign(cs); |
| 2237 | return -ENODEV; |
| 2238 | } |
| 2239 | |
| 2240 | /* gigaset_disconnect |
| 2241 | * This function is called when the Gigaset base is unplugged. |
| 2242 | */ |
| 2243 | static void gigaset_disconnect(struct usb_interface *interface) |
| 2244 | { |
| 2245 | struct cardstate *cs; |
| 2246 | struct bas_cardstate *ucs; |
| 2247 | |
| 2248 | /* clear device sysfs */ |
| 2249 | gigaset_free_dev_sysfs(interface); |
| 2250 | |
| 2251 | cs = usb_get_intfdata(interface); |
| 2252 | usb_set_intfdata(interface, NULL); |
| 2253 | |
| 2254 | IFNULLRET(cs); |
| 2255 | ucs = cs->hw.bas; |
| 2256 | IFNULLRET(ucs); |
| 2257 | |
| 2258 | info("disconnecting GigaSet base"); |
| 2259 | gigaset_stop(cs); |
| 2260 | freeurbs(cs); |
| 2261 | kfree(ucs->rcvbuf); |
| 2262 | ucs->rcvbuf = NULL; |
| 2263 | ucs->rcvbuf_size = 0; |
| 2264 | atomic_set(&ucs->basstate, 0); |
| 2265 | gigaset_unassign(cs); |
| 2266 | } |
| 2267 | |
| 2268 | static struct gigaset_ops gigops = { |
| 2269 | gigaset_write_cmd, |
| 2270 | gigaset_write_room, |
| 2271 | gigaset_chars_in_buffer, |
| 2272 | gigaset_brkchars, |
| 2273 | gigaset_init_bchannel, |
| 2274 | gigaset_close_bchannel, |
| 2275 | gigaset_initbcshw, |
| 2276 | gigaset_freebcshw, |
| 2277 | gigaset_reinitbcshw, |
| 2278 | gigaset_initcshw, |
| 2279 | gigaset_freecshw, |
| 2280 | gigaset_set_modem_ctrl, |
| 2281 | gigaset_baud_rate, |
| 2282 | gigaset_set_line_ctrl, |
| 2283 | gigaset_isoc_send_skb, |
| 2284 | gigaset_isoc_input, |
| 2285 | }; |
| 2286 | |
| 2287 | /* bas_gigaset_init |
| 2288 | * This function is called after the kernel module is loaded. |
| 2289 | */ |
| 2290 | static int __init bas_gigaset_init(void) |
| 2291 | { |
| 2292 | int result; |
| 2293 | |
| 2294 | /* allocate memory for our driver state and intialize it */ |
| 2295 | if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS, |
| 2296 | GIGASET_MODULENAME, GIGASET_DEVNAME, |
| 2297 | GIGASET_DEVFSNAME, &gigops, |
| 2298 | THIS_MODULE)) == NULL) |
| 2299 | goto error; |
| 2300 | |
| 2301 | /* allocate memory for our device state and intialize it */ |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame^] | 2302 | cardstate = gigaset_initcs(driver, 2, 0, 0, cidmode, |
| 2303 | GIGASET_MODULENAME); |
Hansjoerg Lipp | cf7776d | 2006-03-26 01:38:34 -0800 | [diff] [blame] | 2304 | if (!cardstate) |
| 2305 | goto error; |
| 2306 | |
| 2307 | /* register this driver with the USB subsystem */ |
| 2308 | result = usb_register(&gigaset_usb_driver); |
| 2309 | if (result < 0) { |
| 2310 | err("usb_register failed (error %d)", -result); |
| 2311 | goto error; |
| 2312 | } |
| 2313 | |
| 2314 | info(DRIVER_AUTHOR); |
| 2315 | info(DRIVER_DESC); |
| 2316 | return 0; |
| 2317 | |
| 2318 | error: if (cardstate) |
| 2319 | gigaset_freecs(cardstate); |
| 2320 | cardstate = NULL; |
| 2321 | if (driver) |
| 2322 | gigaset_freedriver(driver); |
| 2323 | driver = NULL; |
| 2324 | return -1; |
| 2325 | } |
| 2326 | |
| 2327 | /* bas_gigaset_exit |
| 2328 | * This function is called before the kernel module is unloaded. |
| 2329 | */ |
| 2330 | static void __exit bas_gigaset_exit(void) |
| 2331 | { |
| 2332 | gigaset_blockdriver(driver); /* => probe will fail |
| 2333 | * => no gigaset_start any more |
| 2334 | */ |
| 2335 | |
| 2336 | gigaset_shutdown(cardstate); |
| 2337 | /* from now on, no isdn callback should be possible */ |
| 2338 | |
| 2339 | if (atomic_read(&cardstate->hw.bas->basstate) & BS_ATOPEN) { |
| 2340 | dbg(DEBUG_ANY, "closing AT channel"); |
| 2341 | if (req_submit(cardstate->bcs, |
| 2342 | HD_CLOSE_ATCHANNEL, 0, BAS_TIMEOUT) >= 0) { |
| 2343 | /* successfully submitted - wait for completion */ |
| 2344 | //wait_event_interruptible(cs->initwait, !cs->hw.bas->pending); |
| 2345 | //FIXME need own wait queue? wakeup? |
| 2346 | } |
| 2347 | } |
| 2348 | |
| 2349 | /* deregister this driver with the USB subsystem */ |
| 2350 | usb_deregister(&gigaset_usb_driver); |
| 2351 | /* this will call the disconnect-callback */ |
| 2352 | /* from now on, no disconnect/probe callback should be running */ |
| 2353 | |
| 2354 | gigaset_freecs(cardstate); |
| 2355 | cardstate = NULL; |
| 2356 | gigaset_freedriver(driver); |
| 2357 | driver = NULL; |
| 2358 | } |
| 2359 | |
| 2360 | |
| 2361 | module_init(bas_gigaset_init); |
| 2362 | module_exit(bas_gigaset_exit); |
| 2363 | |
| 2364 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 2365 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 2366 | MODULE_LICENSE("GPL"); |