Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Driver for ST5481 USB ISDN modem |
| 3 | * |
| 4 | * Author Frode Isaksen |
| 5 | * Copyright 2001 by Frode Isaksen <fisaksen@bewan.com> |
| 6 | * 2001 by Kai Germaschewski <kai.germaschewski@gmx.de> |
| 7 | * |
| 8 | * This software may be used and distributed according to the terms |
| 9 | * of the GNU General Public License, incorporated herein by reference. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/usb.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include "st5481.h" |
| 17 | |
| 18 | /* ====================================================================== |
| 19 | * control pipe |
| 20 | */ |
| 21 | |
| 22 | /* |
| 23 | * Send the next endpoint 0 request stored in the FIFO. |
| 24 | * Called either by the completion or by usb_ctrl_msg. |
| 25 | */ |
| 26 | static void usb_next_ctrl_msg(struct urb *urb, |
| 27 | struct st5481_adapter *adapter) |
| 28 | { |
| 29 | struct st5481_ctrl *ctrl = &adapter->ctrl; |
| 30 | int r_index; |
| 31 | |
| 32 | if (test_and_set_bit(0, &ctrl->busy)) { |
| 33 | return; |
| 34 | } |
| 35 | |
| 36 | if ((r_index = fifo_remove(&ctrl->msg_fifo.f)) < 0) { |
| 37 | test_and_clear_bit(0,&ctrl->busy); |
| 38 | return; |
| 39 | } |
| 40 | urb->setup_packet = |
| 41 | (unsigned char *)&ctrl->msg_fifo.data[r_index]; |
| 42 | |
| 43 | DBG(1,"request=0x%02x,value=0x%04x,index=%x", |
| 44 | ((struct ctrl_msg *)urb->setup_packet)->dr.bRequest, |
| 45 | ((struct ctrl_msg *)urb->setup_packet)->dr.wValue, |
| 46 | ((struct ctrl_msg *)urb->setup_packet)->dr.wIndex); |
| 47 | |
| 48 | // Prepare the URB |
| 49 | urb->dev = adapter->usb_dev; |
| 50 | |
| 51 | SUBMIT_URB(urb, GFP_ATOMIC); |
| 52 | } |
| 53 | |
| 54 | /* |
| 55 | * Asynchronous endpoint 0 request (async version of usb_control_msg). |
| 56 | * The request will be queued up in a FIFO if the endpoint is busy. |
| 57 | */ |
| 58 | void usb_ctrl_msg(struct st5481_adapter *adapter, |
| 59 | u8 request, u8 requesttype, u16 value, u16 index, |
| 60 | ctrl_complete_t complete, void *context) |
| 61 | { |
| 62 | struct st5481_ctrl *ctrl = &adapter->ctrl; |
| 63 | int w_index; |
| 64 | struct ctrl_msg *ctrl_msg; |
| 65 | |
| 66 | if ((w_index = fifo_add(&ctrl->msg_fifo.f)) < 0) { |
| 67 | WARN("control msg FIFO full"); |
| 68 | return; |
| 69 | } |
| 70 | ctrl_msg = &ctrl->msg_fifo.data[w_index]; |
| 71 | |
| 72 | ctrl_msg->dr.bRequestType = requesttype; |
| 73 | ctrl_msg->dr.bRequest = request; |
| 74 | ctrl_msg->dr.wValue = cpu_to_le16p(&value); |
| 75 | ctrl_msg->dr.wIndex = cpu_to_le16p(&index); |
| 76 | ctrl_msg->dr.wLength = 0; |
| 77 | ctrl_msg->complete = complete; |
| 78 | ctrl_msg->context = context; |
| 79 | |
| 80 | usb_next_ctrl_msg(ctrl->urb, adapter); |
| 81 | } |
| 82 | |
| 83 | /* |
| 84 | * Asynchronous endpoint 0 device request. |
| 85 | */ |
| 86 | void st5481_usb_device_ctrl_msg(struct st5481_adapter *adapter, |
| 87 | u8 request, u16 value, |
| 88 | ctrl_complete_t complete, void *context) |
| 89 | { |
| 90 | usb_ctrl_msg(adapter, request, |
| 91 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| 92 | value, 0, complete, context); |
| 93 | } |
| 94 | |
| 95 | /* |
| 96 | * Asynchronous pipe reset (async version of usb_clear_halt). |
| 97 | */ |
| 98 | void st5481_usb_pipe_reset(struct st5481_adapter *adapter, |
| 99 | u_char pipe, |
| 100 | ctrl_complete_t complete, void *context) |
| 101 | { |
| 102 | DBG(1,"pipe=%02x",pipe); |
| 103 | |
| 104 | usb_ctrl_msg(adapter, |
| 105 | USB_REQ_CLEAR_FEATURE, USB_DIR_OUT | USB_RECIP_ENDPOINT, |
| 106 | 0, pipe, complete, context); |
| 107 | } |
| 108 | |
| 109 | |
| 110 | /* |
| 111 | Physical level functions |
| 112 | */ |
| 113 | |
| 114 | void st5481_ph_command(struct st5481_adapter *adapter, unsigned int command) |
| 115 | { |
| 116 | DBG(8,"command=%s", ST5481_CMD_string(command)); |
| 117 | |
| 118 | st5481_usb_device_ctrl_msg(adapter, TXCI, command, NULL, NULL); |
| 119 | } |
| 120 | |
| 121 | /* |
| 122 | * The request on endpoint 0 has completed. |
| 123 | * Call the user provided completion routine and try |
| 124 | * to send the next request. |
| 125 | */ |
| 126 | static void usb_ctrl_complete(struct urb *urb, struct pt_regs *regs) |
| 127 | { |
| 128 | struct st5481_adapter *adapter = urb->context; |
| 129 | struct st5481_ctrl *ctrl = &adapter->ctrl; |
| 130 | struct ctrl_msg *ctrl_msg; |
| 131 | |
| 132 | if (unlikely(urb->status < 0)) { |
| 133 | if (urb->status != -ENOENT && urb->status != -ESHUTDOWN) { |
| 134 | WARN("urb status %d",urb->status); |
| 135 | } else { |
| 136 | DBG(1,"urb killed"); |
| 137 | return; // Give up |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | ctrl_msg = (struct ctrl_msg *)urb->setup_packet; |
| 142 | |
| 143 | if (ctrl_msg->dr.bRequest == USB_REQ_CLEAR_FEATURE) { |
| 144 | /* Special case handling for pipe reset */ |
| 145 | le16_to_cpus(&ctrl_msg->dr.wIndex); |
| 146 | |
| 147 | /* toggle is reset on clear */ |
| 148 | usb_settoggle(adapter->usb_dev, |
| 149 | ctrl_msg->dr.wIndex & ~USB_DIR_IN, |
| 150 | (ctrl_msg->dr.wIndex & USB_DIR_IN) == 0, |
| 151 | 0); |
| 152 | |
| 153 | |
| 154 | } |
| 155 | |
| 156 | if (ctrl_msg->complete) |
| 157 | ctrl_msg->complete(ctrl_msg->context); |
| 158 | |
| 159 | clear_bit(0, &ctrl->busy); |
| 160 | |
| 161 | // Try to send next control message |
| 162 | usb_next_ctrl_msg(urb, adapter); |
| 163 | return; |
| 164 | } |
| 165 | |
| 166 | /* ====================================================================== |
| 167 | * interrupt pipe |
| 168 | */ |
| 169 | |
| 170 | /* |
| 171 | * The interrupt endpoint will be called when any |
| 172 | * of the 6 registers changes state (depending on masks). |
| 173 | * Decode the register values and schedule a private event. |
| 174 | * Called at interrupt. |
| 175 | */ |
| 176 | static void usb_int_complete(struct urb *urb, struct pt_regs *regs) |
| 177 | { |
| 178 | u8 *data = urb->transfer_buffer; |
| 179 | u8 irqbyte; |
| 180 | struct st5481_adapter *adapter = urb->context; |
| 181 | int j; |
| 182 | int status; |
| 183 | |
| 184 | switch (urb->status) { |
| 185 | case 0: |
| 186 | /* success */ |
| 187 | break; |
| 188 | case -ECONNRESET: |
| 189 | case -ENOENT: |
| 190 | case -ESHUTDOWN: |
| 191 | /* this urb is terminated, clean up */ |
| 192 | DBG(1, "urb shutting down with status: %d", urb->status); |
| 193 | return; |
| 194 | default: |
| 195 | WARN("nonzero urb status received: %d", urb->status); |
| 196 | goto exit; |
| 197 | } |
| 198 | |
| 199 | |
| 200 | DBG_PACKET(1, data, INT_PKT_SIZE); |
| 201 | |
| 202 | if (urb->actual_length == 0) { |
| 203 | goto exit; |
| 204 | } |
| 205 | |
| 206 | irqbyte = data[MPINT]; |
| 207 | if (irqbyte & DEN_INT) |
| 208 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_DEN, NULL); |
| 209 | |
| 210 | if (irqbyte & DCOLL_INT) |
| 211 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_COLL, NULL); |
| 212 | |
| 213 | irqbyte = data[FFINT_D]; |
| 214 | if (irqbyte & OUT_UNDERRUN) |
| 215 | FsmEvent(&adapter->d_out.fsm, EV_DOUT_UNDERRUN, NULL); |
| 216 | |
| 217 | if (irqbyte & OUT_DOWN) |
| 218 | ;// printk("OUT_DOWN\n"); |
| 219 | |
| 220 | irqbyte = data[MPINT]; |
| 221 | if (irqbyte & RXCI_INT) |
| 222 | FsmEvent(&adapter->l1m, data[CCIST] & 0x0f, NULL); |
| 223 | |
| 224 | for (j = 0; j < 2; j++) |
| 225 | adapter->bcs[j].b_out.flow_event |= data[FFINT_B1 + j]; |
| 226 | |
| 227 | urb->actual_length = 0; |
| 228 | |
| 229 | exit: |
| 230 | status = usb_submit_urb (urb, GFP_ATOMIC); |
| 231 | if (status) |
| 232 | WARN("usb_submit_urb failed with result %d", status); |
| 233 | } |
| 234 | |
| 235 | /* ====================================================================== |
| 236 | * initialization |
| 237 | */ |
| 238 | |
| 239 | int st5481_setup_usb(struct st5481_adapter *adapter) |
| 240 | { |
| 241 | struct usb_device *dev = adapter->usb_dev; |
| 242 | struct st5481_ctrl *ctrl = &adapter->ctrl; |
| 243 | struct st5481_intr *intr = &adapter->intr; |
| 244 | struct usb_interface *intf; |
| 245 | struct usb_host_interface *altsetting = NULL; |
| 246 | struct usb_host_endpoint *endpoint; |
| 247 | int status; |
| 248 | struct urb *urb; |
| 249 | u8 *buf; |
| 250 | |
| 251 | DBG(1,""); |
| 252 | |
| 253 | if ((status = usb_reset_configuration (dev)) < 0) { |
| 254 | WARN("reset_configuration failed,status=%d",status); |
| 255 | return status; |
| 256 | } |
| 257 | |
| 258 | intf = usb_ifnum_to_if(dev, 0); |
| 259 | if (intf) |
| 260 | altsetting = usb_altnum_to_altsetting(intf, 3); |
| 261 | if (!altsetting) |
| 262 | return -ENXIO; |
| 263 | |
| 264 | // Check if the config is sane |
| 265 | if ( altsetting->desc.bNumEndpoints != 7 ) { |
| 266 | WARN("expecting 7 got %d endpoints!", altsetting->desc.bNumEndpoints); |
| 267 | return -EINVAL; |
| 268 | } |
| 269 | |
| 270 | // The descriptor is wrong for some early samples of the ST5481 chip |
| 271 | altsetting->endpoint[3].desc.wMaxPacketSize = __constant_cpu_to_le16(32); |
| 272 | altsetting->endpoint[4].desc.wMaxPacketSize = __constant_cpu_to_le16(32); |
| 273 | |
| 274 | // Use alternative setting 3 on interface 0 to have 2B+D |
| 275 | if ((status = usb_set_interface (dev, 0, 3)) < 0) { |
| 276 | WARN("usb_set_interface failed,status=%d",status); |
| 277 | return status; |
| 278 | } |
| 279 | |
| 280 | // Allocate URB for control endpoint |
| 281 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 282 | if (!urb) { |
| 283 | return -ENOMEM; |
| 284 | } |
| 285 | ctrl->urb = urb; |
| 286 | |
| 287 | // Fill the control URB |
| 288 | usb_fill_control_urb (urb, dev, |
| 289 | usb_sndctrlpipe(dev, 0), |
| 290 | NULL, NULL, 0, usb_ctrl_complete, adapter); |
| 291 | |
| 292 | |
| 293 | fifo_init(&ctrl->msg_fifo.f, ARRAY_SIZE(ctrl->msg_fifo.data)); |
| 294 | |
| 295 | // Allocate URBs and buffers for interrupt endpoint |
| 296 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 297 | if (!urb) { |
| 298 | return -ENOMEM; |
| 299 | } |
| 300 | intr->urb = urb; |
| 301 | |
| 302 | buf = kmalloc(INT_PKT_SIZE, GFP_KERNEL); |
| 303 | if (!buf) { |
| 304 | return -ENOMEM; |
| 305 | } |
| 306 | |
| 307 | endpoint = &altsetting->endpoint[EP_INT-1]; |
| 308 | |
| 309 | // Fill the interrupt URB |
| 310 | usb_fill_int_urb(urb, dev, |
| 311 | usb_rcvintpipe(dev, endpoint->desc.bEndpointAddress), |
| 312 | buf, INT_PKT_SIZE, |
| 313 | usb_int_complete, adapter, |
| 314 | endpoint->desc.bInterval); |
| 315 | |
| 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | /* |
| 320 | * Release buffers and URBs for the interrupt and control |
| 321 | * endpoint. |
| 322 | */ |
| 323 | void st5481_release_usb(struct st5481_adapter *adapter) |
| 324 | { |
| 325 | struct st5481_intr *intr = &adapter->intr; |
| 326 | struct st5481_ctrl *ctrl = &adapter->ctrl; |
| 327 | |
| 328 | DBG(1,""); |
| 329 | |
| 330 | // Stop and free Control and Interrupt URBs |
| 331 | usb_unlink_urb(ctrl->urb); |
| 332 | if (ctrl->urb->transfer_buffer) |
| 333 | kfree(ctrl->urb->transfer_buffer); |
| 334 | usb_free_urb(ctrl->urb); |
| 335 | |
| 336 | usb_unlink_urb(intr->urb); |
| 337 | if (intr->urb->transfer_buffer) |
| 338 | kfree(intr->urb->transfer_buffer); |
| 339 | usb_free_urb(intr->urb); |
| 340 | } |
| 341 | |
| 342 | /* |
| 343 | * Initialize the adapter. |
| 344 | */ |
| 345 | void st5481_start(struct st5481_adapter *adapter) |
| 346 | { |
| 347 | static const u8 init_cmd_table[]={ |
| 348 | SET_DEFAULT,0, |
| 349 | STT,0, |
| 350 | SDA_MIN,0x0d, |
| 351 | SDA_MAX,0x29, |
| 352 | SDELAY_VALUE,0x14, |
| 353 | GPIO_DIR,0x01, |
| 354 | GPIO_OUT,RED_LED, |
| 355 | // FFCTRL_OUT_D,4, |
| 356 | // FFCTRH_OUT_D,12, |
| 357 | FFCTRL_OUT_B1,6, |
| 358 | FFCTRH_OUT_B1,20, |
| 359 | FFCTRL_OUT_B2,6, |
| 360 | FFCTRH_OUT_B2,20, |
| 361 | MPMSK,RXCI_INT+DEN_INT+DCOLL_INT, |
| 362 | 0 |
| 363 | }; |
| 364 | struct st5481_intr *intr = &adapter->intr; |
| 365 | int i = 0; |
| 366 | u8 request,value; |
| 367 | |
| 368 | DBG(8,""); |
| 369 | |
| 370 | adapter->leds = RED_LED; |
| 371 | |
| 372 | // Start receiving on the interrupt endpoint |
| 373 | SUBMIT_URB(intr->urb, GFP_KERNEL); |
| 374 | |
| 375 | while ((request = init_cmd_table[i++])) { |
| 376 | value = init_cmd_table[i++]; |
| 377 | st5481_usb_device_ctrl_msg(adapter, request, value, NULL, NULL); |
| 378 | } |
| 379 | st5481_ph_command(adapter, ST5481_CMD_PUP); |
| 380 | } |
| 381 | |
| 382 | /* |
| 383 | * Reset the adapter to default values. |
| 384 | */ |
| 385 | void st5481_stop(struct st5481_adapter *adapter) |
| 386 | { |
| 387 | DBG(8,""); |
| 388 | |
| 389 | st5481_usb_device_ctrl_msg(adapter, SET_DEFAULT, 0, NULL, NULL); |
| 390 | } |
| 391 | |
| 392 | /* ====================================================================== |
| 393 | * isochronous USB helpers |
| 394 | */ |
| 395 | |
| 396 | static void |
| 397 | fill_isoc_urb(struct urb *urb, struct usb_device *dev, |
| 398 | unsigned int pipe, void *buf, int num_packets, |
| 399 | int packet_size, usb_complete_t complete, |
| 400 | void *context) |
| 401 | { |
| 402 | int k; |
| 403 | |
| 404 | spin_lock_init(&urb->lock); |
| 405 | urb->dev=dev; |
| 406 | urb->pipe=pipe; |
| 407 | urb->transfer_buffer=buf; |
| 408 | urb->number_of_packets = num_packets; |
| 409 | urb->transfer_buffer_length=num_packets*packet_size; |
| 410 | urb->actual_length = 0; |
| 411 | urb->complete=complete; |
| 412 | urb->context=context; |
| 413 | urb->transfer_flags=URB_ISO_ASAP; |
| 414 | for (k = 0; k < num_packets; k++) { |
| 415 | urb->iso_frame_desc[k].offset = packet_size * k; |
| 416 | urb->iso_frame_desc[k].length = packet_size; |
| 417 | urb->iso_frame_desc[k].actual_length = 0; |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | int |
| 422 | st5481_setup_isocpipes(struct urb* urb[2], struct usb_device *dev, |
| 423 | unsigned int pipe, int num_packets, |
| 424 | int packet_size, int buf_size, |
| 425 | usb_complete_t complete, void *context) |
| 426 | { |
| 427 | int j, retval; |
| 428 | unsigned char *buf; |
| 429 | |
| 430 | for (j = 0; j < 2; j++) { |
| 431 | retval = -ENOMEM; |
| 432 | urb[j] = usb_alloc_urb(num_packets, GFP_KERNEL); |
| 433 | if (!urb[j]) |
| 434 | goto err; |
| 435 | |
| 436 | // Allocate memory for 2000bytes/sec (16Kb/s) |
| 437 | buf = kmalloc(buf_size, GFP_KERNEL); |
| 438 | if (!buf) |
| 439 | goto err; |
| 440 | |
| 441 | // Fill the isochronous URB |
| 442 | fill_isoc_urb(urb[j], dev, pipe, buf, |
| 443 | num_packets, packet_size, complete, |
| 444 | context); |
| 445 | } |
| 446 | return 0; |
| 447 | |
| 448 | err: |
| 449 | for (j = 0; j < 2; j++) { |
| 450 | if (urb[j]) { |
| 451 | if (urb[j]->transfer_buffer) |
| 452 | kfree(urb[j]->transfer_buffer); |
| 453 | usb_free_urb(urb[j]); |
| 454 | } |
| 455 | } |
| 456 | return retval; |
| 457 | } |
| 458 | |
| 459 | void st5481_release_isocpipes(struct urb* urb[2]) |
| 460 | { |
| 461 | int j; |
| 462 | |
| 463 | for (j = 0; j < 2; j++) { |
| 464 | usb_unlink_urb(urb[j]); |
| 465 | if (urb[j]->transfer_buffer) |
| 466 | kfree(urb[j]->transfer_buffer); |
| 467 | usb_free_urb(urb[j]); |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | /* |
| 472 | * Decode frames received on the B/D channel. |
| 473 | * Note that this function will be called continously |
| 474 | * with 64Kbit/s / 16Kbit/s of data and hence it will be |
| 475 | * called 50 times per second with 20 ISOC descriptors. |
| 476 | * Called at interrupt. |
| 477 | */ |
| 478 | static void usb_in_complete(struct urb *urb, struct pt_regs *regs) |
| 479 | { |
| 480 | struct st5481_in *in = urb->context; |
| 481 | unsigned char *ptr; |
| 482 | struct sk_buff *skb; |
| 483 | int len, count, status; |
| 484 | |
| 485 | if (unlikely(urb->status < 0)) { |
| 486 | if (urb->status != -ENOENT && urb->status != -ESHUTDOWN) { |
| 487 | WARN("urb status %d",urb->status); |
| 488 | } else { |
| 489 | DBG(1,"urb killed"); |
| 490 | return; // Give up |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | DBG_ISO_PACKET(0x80,urb); |
| 495 | |
| 496 | len = st5481_isoc_flatten(urb); |
| 497 | ptr = urb->transfer_buffer; |
| 498 | while (len > 0) { |
| 499 | if (in->mode == L1_MODE_TRANS) { |
| 500 | memcpy(in->rcvbuf, ptr, len); |
| 501 | status = len; |
| 502 | len = 0; |
| 503 | } else { |
| 504 | status = isdnhdlc_decode(&in->hdlc_state, ptr, len, &count, |
| 505 | in->rcvbuf, in->bufsize); |
| 506 | ptr += count; |
| 507 | len -= count; |
| 508 | } |
| 509 | |
| 510 | if (status > 0) { |
| 511 | // Good frame received |
| 512 | DBG(4,"count=%d",status); |
| 513 | DBG_PACKET(0x400, in->rcvbuf, status); |
| 514 | if (!(skb = dev_alloc_skb(status))) { |
| 515 | WARN("receive out of memory\n"); |
| 516 | break; |
| 517 | } |
| 518 | memcpy(skb_put(skb, status), in->rcvbuf, status); |
| 519 | in->hisax_if->l1l2(in->hisax_if, PH_DATA | INDICATION, skb); |
| 520 | } else if (status == -HDLC_CRC_ERROR) { |
| 521 | INFO("CRC error"); |
| 522 | } else if (status == -HDLC_FRAMING_ERROR) { |
| 523 | INFO("framing error"); |
| 524 | } else if (status == -HDLC_LENGTH_ERROR) { |
| 525 | INFO("length error"); |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | // Prepare URB for next transfer |
| 530 | urb->dev = in->adapter->usb_dev; |
| 531 | urb->actual_length = 0; |
| 532 | |
| 533 | SUBMIT_URB(urb, GFP_ATOMIC); |
| 534 | } |
| 535 | |
| 536 | int st5481_setup_in(struct st5481_in *in) |
| 537 | { |
| 538 | struct usb_device *dev = in->adapter->usb_dev; |
| 539 | int retval; |
| 540 | |
| 541 | DBG(4,""); |
| 542 | |
| 543 | in->rcvbuf = kmalloc(in->bufsize, GFP_KERNEL); |
| 544 | retval = -ENOMEM; |
| 545 | if (!in->rcvbuf) |
| 546 | goto err; |
| 547 | |
| 548 | retval = st5481_setup_isocpipes(in->urb, dev, |
| 549 | usb_rcvisocpipe(dev, in->ep), |
| 550 | in->num_packets, in->packet_size, |
| 551 | in->num_packets * in->packet_size, |
| 552 | usb_in_complete, in); |
| 553 | if (retval) |
| 554 | goto err_free; |
| 555 | return 0; |
| 556 | |
| 557 | err_free: |
| 558 | kfree(in->rcvbuf); |
| 559 | err: |
| 560 | return retval; |
| 561 | } |
| 562 | |
| 563 | void st5481_release_in(struct st5481_in *in) |
| 564 | { |
| 565 | DBG(2,""); |
| 566 | |
| 567 | st5481_release_isocpipes(in->urb); |
| 568 | } |
| 569 | |
| 570 | /* |
| 571 | * Make the transfer_buffer contiguous by |
| 572 | * copying from the iso descriptors if necessary. |
| 573 | */ |
| 574 | int st5481_isoc_flatten(struct urb *urb) |
| 575 | { |
| 576 | struct usb_iso_packet_descriptor *pipd,*pend; |
| 577 | unsigned char *src,*dst; |
| 578 | unsigned int len; |
| 579 | |
| 580 | if (urb->status < 0) { |
| 581 | return urb->status; |
| 582 | } |
| 583 | for (pipd = &urb->iso_frame_desc[0], |
| 584 | pend = &urb->iso_frame_desc[urb->number_of_packets], |
| 585 | dst = urb->transfer_buffer; |
| 586 | pipd < pend; |
| 587 | pipd++) { |
| 588 | |
| 589 | if (pipd->status < 0) { |
| 590 | return (pipd->status); |
| 591 | } |
| 592 | |
| 593 | len = pipd->actual_length; |
| 594 | pipd->actual_length = 0; |
| 595 | src = urb->transfer_buffer+pipd->offset; |
| 596 | |
| 597 | if (src != dst) { |
| 598 | // Need to copy since isoc buffers not full |
| 599 | while (len--) { |
| 600 | *dst++ = *src++; |
| 601 | } |
| 602 | } else { |
| 603 | // No need to copy, just update destination buffer |
| 604 | dst += len; |
| 605 | } |
| 606 | } |
| 607 | // Return size of flattened buffer |
| 608 | return (dst - (unsigned char *)urb->transfer_buffer); |
| 609 | } |
| 610 | |
| 611 | static void st5481_start_rcv(void *context) |
| 612 | { |
| 613 | struct st5481_in *in = context; |
| 614 | struct st5481_adapter *adapter = in->adapter; |
| 615 | |
| 616 | DBG(4,""); |
| 617 | |
| 618 | in->urb[0]->dev = adapter->usb_dev; |
| 619 | SUBMIT_URB(in->urb[0], GFP_KERNEL); |
| 620 | |
| 621 | in->urb[1]->dev = adapter->usb_dev; |
| 622 | SUBMIT_URB(in->urb[1], GFP_KERNEL); |
| 623 | } |
| 624 | |
| 625 | void st5481_in_mode(struct st5481_in *in, int mode) |
| 626 | { |
| 627 | if (in->mode == mode) |
| 628 | return; |
| 629 | |
| 630 | in->mode = mode; |
| 631 | |
| 632 | usb_unlink_urb(in->urb[0]); |
| 633 | usb_unlink_urb(in->urb[1]); |
| 634 | |
| 635 | if (in->mode != L1_MODE_NULL) { |
| 636 | if (in->mode != L1_MODE_TRANS) |
| 637 | isdnhdlc_rcv_init(&in->hdlc_state, |
| 638 | in->mode == L1_MODE_HDLC_56K); |
| 639 | |
| 640 | st5481_usb_pipe_reset(in->adapter, in->ep, NULL, NULL); |
| 641 | st5481_usb_device_ctrl_msg(in->adapter, in->counter, |
| 642 | in->packet_size, |
| 643 | NULL, NULL); |
| 644 | st5481_start_rcv(in); |
| 645 | } else { |
| 646 | st5481_usb_device_ctrl_msg(in->adapter, in->counter, |
| 647 | 0, NULL, NULL); |
| 648 | } |
| 649 | } |
| 650 | |