Hemant Kumar | 14401d5 | 2011-11-03 16:40:32 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2011, Code Aurora Forum. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/errno.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/kref.h> |
| 19 | #include <linux/debugfs.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/uaccess.h> |
| 22 | #include <linux/ratelimit.h> |
| 23 | #include <linux/usb/ch9.h> |
| 24 | #include <linux/usb/cdc.h> |
| 25 | #include <linux/termios.h> |
| 26 | #include <asm/unaligned.h> |
| 27 | #include <mach/usb_bridge.h> |
| 28 | |
| 29 | static const char *ctrl_bridge_names[] = { |
| 30 | "dun_ctrl_hsic0", |
| 31 | "rmnet_ctrl_hsic0" |
| 32 | }; |
| 33 | |
| 34 | /* polling interval for Interrupt ep */ |
| 35 | #define HS_INTERVAL 7 |
| 36 | #define FS_LS_INTERVAL 3 |
| 37 | |
| 38 | #define ACM_CTRL_DTR (1 << 0) |
| 39 | #define DEFAULT_READ_URB_LENGTH 4096 |
| 40 | |
| 41 | struct ctrl_bridge { |
| 42 | |
| 43 | struct usb_device *udev; |
| 44 | struct usb_interface *intf; |
| 45 | |
| 46 | unsigned int int_pipe; |
| 47 | struct urb *inturb; |
| 48 | void *intbuf; |
| 49 | |
| 50 | struct urb *readurb; |
| 51 | void *readbuf; |
| 52 | |
| 53 | struct usb_anchor tx_submitted; |
| 54 | struct usb_ctrlrequest *in_ctlreq; |
| 55 | |
| 56 | struct bridge *brdg; |
| 57 | struct platform_device *pdev; |
| 58 | |
| 59 | /* input control lines (DSR, CTS, CD, RI) */ |
| 60 | unsigned int cbits_tohost; |
| 61 | |
| 62 | /* output control lines (DTR, RTS) */ |
| 63 | unsigned int cbits_tomdm; |
| 64 | |
| 65 | /* counters */ |
| 66 | unsigned int snd_encap_cmd; |
| 67 | unsigned int get_encap_res; |
| 68 | unsigned int resp_avail; |
| 69 | unsigned int set_ctrl_line_sts; |
| 70 | unsigned int notify_ser_state; |
| 71 | |
| 72 | }; |
| 73 | |
| 74 | static struct ctrl_bridge *__dev[MAX_BRIDGE_DEVICES]; |
| 75 | |
| 76 | /* counter used for indexing ctrl bridge devices */ |
| 77 | static int ch_id; |
| 78 | |
| 79 | unsigned int ctrl_bridge_get_cbits_tohost(unsigned int id) |
| 80 | { |
| 81 | struct ctrl_bridge *dev; |
| 82 | |
| 83 | if (id >= MAX_BRIDGE_DEVICES) |
| 84 | return -EINVAL; |
| 85 | |
| 86 | dev = __dev[id]; |
| 87 | if (!dev) |
| 88 | return -ENODEV; |
| 89 | |
| 90 | return dev->cbits_tohost; |
| 91 | } |
| 92 | EXPORT_SYMBOL(ctrl_bridge_get_cbits_tohost); |
| 93 | |
| 94 | int ctrl_bridge_set_cbits(unsigned int id, unsigned int cbits) |
| 95 | { |
| 96 | struct ctrl_bridge *dev; |
| 97 | struct bridge *brdg; |
| 98 | int retval; |
| 99 | |
| 100 | if (id >= MAX_BRIDGE_DEVICES) |
| 101 | return -EINVAL; |
| 102 | |
| 103 | dev = __dev[id]; |
| 104 | if (!dev) |
| 105 | return -ENODEV; |
| 106 | |
| 107 | pr_debug("%s: dev[id] =%u cbits : %u\n", __func__, id, cbits); |
| 108 | |
| 109 | brdg = dev->brdg; |
| 110 | if (!brdg) |
| 111 | return -ENODEV; |
| 112 | |
| 113 | dev->cbits_tomdm = cbits; |
| 114 | |
| 115 | retval = ctrl_bridge_write(id, NULL, 0); |
| 116 | |
| 117 | /* if DTR is high, update latest modem info to host */ |
| 118 | if (brdg && (cbits & ACM_CTRL_DTR) && brdg->ops.send_cbits) |
| 119 | brdg->ops.send_cbits(brdg->ctx, dev->cbits_tohost); |
| 120 | |
| 121 | return retval; |
| 122 | } |
| 123 | EXPORT_SYMBOL(ctrl_bridge_set_cbits); |
| 124 | |
| 125 | static void resp_avail_cb(struct urb *urb) |
| 126 | { |
| 127 | struct ctrl_bridge *dev = urb->context; |
| 128 | struct usb_device *udev; |
| 129 | int status = 0; |
| 130 | int resubmit_urb = 1; |
| 131 | struct bridge *brdg = dev->brdg; |
| 132 | |
| 133 | udev = interface_to_usbdev(dev->intf); |
| 134 | switch (urb->status) { |
| 135 | case 0: |
| 136 | /*success*/ |
| 137 | dev->get_encap_res++; |
| 138 | if (brdg && brdg->ops.send_pkt) |
| 139 | brdg->ops.send_pkt(brdg->ctx, urb->transfer_buffer, |
| 140 | urb->actual_length); |
| 141 | break; |
| 142 | |
| 143 | /*do not resubmit*/ |
| 144 | case -ESHUTDOWN: |
| 145 | case -ENOENT: |
| 146 | case -ECONNRESET: |
| 147 | /* unplug */ |
| 148 | case -EPROTO: |
| 149 | /*babble error*/ |
| 150 | resubmit_urb = 0; |
| 151 | /*resubmit*/ |
| 152 | case -EOVERFLOW: |
| 153 | default: |
| 154 | dev_dbg(&udev->dev, "%s: non zero urb status = %d\n", |
| 155 | __func__, urb->status); |
| 156 | } |
| 157 | |
| 158 | if (resubmit_urb) { |
| 159 | /*re- submit int urb to check response available*/ |
| 160 | status = usb_submit_urb(dev->inturb, GFP_ATOMIC); |
| 161 | if (status) |
| 162 | dev_err(&udev->dev, |
| 163 | "%s: Error re-submitting Int URB %d\n", |
| 164 | __func__, status); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | static void notification_available_cb(struct urb *urb) |
| 169 | { |
| 170 | int status; |
| 171 | struct usb_cdc_notification *ctrl; |
| 172 | struct usb_device *udev; |
| 173 | struct ctrl_bridge *dev = urb->context; |
| 174 | struct bridge *brdg = dev->brdg; |
| 175 | unsigned int ctrl_bits; |
| 176 | unsigned char *data; |
| 177 | |
| 178 | udev = interface_to_usbdev(dev->intf); |
| 179 | |
| 180 | switch (urb->status) { |
| 181 | case 0: |
| 182 | /*success*/ |
| 183 | break; |
| 184 | case -ESHUTDOWN: |
| 185 | case -ENOENT: |
| 186 | case -ECONNRESET: |
| 187 | case -EPROTO: |
| 188 | /* unplug */ |
| 189 | return; |
| 190 | case -EPIPE: |
| 191 | dev_err(&udev->dev, "%s: stall on int endpoint\n", __func__); |
| 192 | /* TBD : halt to be cleared in work */ |
| 193 | case -EOVERFLOW: |
| 194 | default: |
| 195 | pr_debug_ratelimited("%s: non zero urb status = %d\n", |
| 196 | __func__, urb->status); |
| 197 | goto resubmit_int_urb; |
| 198 | } |
| 199 | |
| 200 | ctrl = (struct usb_cdc_notification *)urb->transfer_buffer; |
| 201 | data = (unsigned char *)(ctrl + 1); |
| 202 | |
| 203 | switch (ctrl->bNotificationType) { |
| 204 | case USB_CDC_NOTIFY_RESPONSE_AVAILABLE: |
| 205 | dev->resp_avail++; |
| 206 | usb_fill_control_urb(dev->readurb, udev, |
| 207 | usb_rcvctrlpipe(udev, 0), |
| 208 | (unsigned char *)dev->in_ctlreq, |
| 209 | dev->readbuf, |
| 210 | DEFAULT_READ_URB_LENGTH, |
| 211 | resp_avail_cb, dev); |
| 212 | |
| 213 | status = usb_submit_urb(dev->readurb, GFP_ATOMIC); |
| 214 | if (status) { |
| 215 | dev_err(&udev->dev, |
| 216 | "%s: Error submitting Read URB %d\n", |
| 217 | __func__, status); |
| 218 | goto resubmit_int_urb; |
| 219 | } |
| 220 | return; |
| 221 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: |
| 222 | dev_dbg(&udev->dev, "%s network\n", ctrl->wValue ? |
| 223 | "connected to" : "disconnected from"); |
| 224 | break; |
| 225 | case USB_CDC_NOTIFY_SERIAL_STATE: |
| 226 | dev->notify_ser_state++; |
| 227 | ctrl_bits = get_unaligned_le16(data); |
| 228 | dev_dbg(&udev->dev, "serial state: %d\n", ctrl_bits); |
| 229 | dev->cbits_tohost = ctrl_bits; |
| 230 | if (brdg && brdg->ops.send_cbits) |
| 231 | brdg->ops.send_cbits(brdg->ctx, ctrl_bits); |
| 232 | break; |
| 233 | default: |
| 234 | dev_err(&udev->dev, "%s: unknown notification %d received:" |
| 235 | "index %d len %d data0 %d data1 %d", |
| 236 | __func__, ctrl->bNotificationType, ctrl->wIndex, |
| 237 | ctrl->wLength, data[0], data[1]); |
| 238 | } |
| 239 | |
| 240 | resubmit_int_urb: |
| 241 | status = usb_submit_urb(urb, GFP_ATOMIC); |
| 242 | if (status) |
| 243 | dev_err(&udev->dev, "%s: Error re-submitting Int URB %d\n", |
| 244 | __func__, status); |
| 245 | } |
| 246 | |
| 247 | int ctrl_bridge_start_read(struct ctrl_bridge *dev) |
| 248 | { |
| 249 | int retval = 0; |
| 250 | struct usb_device *udev; |
| 251 | |
| 252 | udev = interface_to_usbdev(dev->intf); |
| 253 | |
| 254 | retval = usb_autopm_get_interface_async(dev->intf); |
| 255 | if (retval < 0) { |
| 256 | dev_err(&udev->dev, "%s resumption fail\n", __func__); |
| 257 | goto done_nopm; |
| 258 | } |
| 259 | |
| 260 | retval = usb_submit_urb(dev->inturb, GFP_KERNEL); |
| 261 | if (retval < 0) |
| 262 | dev_err(&udev->dev, "%s intr submit %d\n", __func__, retval); |
| 263 | |
| 264 | usb_autopm_put_interface_async(dev->intf); |
| 265 | done_nopm: |
| 266 | return retval; |
| 267 | } |
| 268 | |
| 269 | static int ctrl_bridge_stop_read(struct ctrl_bridge *dev) |
| 270 | { |
| 271 | if (dev->readurb) { |
| 272 | dev_dbg(&dev->udev->dev, "killing rcv urb\n"); |
| 273 | usb_unlink_urb(dev->readurb); |
| 274 | } |
| 275 | |
| 276 | if (dev->inturb) { |
| 277 | dev_dbg(&dev->udev->dev, "killing int urb\n"); |
| 278 | usb_unlink_urb(dev->inturb); |
| 279 | } |
| 280 | |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | int ctrl_bridge_open(struct bridge *brdg) |
| 285 | { |
| 286 | struct ctrl_bridge *dev; |
| 287 | |
| 288 | if (!brdg) { |
| 289 | err("bridge is null\n"); |
| 290 | return -EINVAL; |
| 291 | } |
| 292 | |
| 293 | if (brdg->ch_id >= MAX_BRIDGE_DEVICES) |
| 294 | return -EINVAL; |
| 295 | |
| 296 | dev = __dev[brdg->ch_id]; |
| 297 | if (!dev) { |
| 298 | err("dev is null\n"); |
| 299 | return -ENODEV; |
| 300 | } |
| 301 | |
| 302 | dev->brdg = brdg; |
| 303 | dev->snd_encap_cmd = 0; |
| 304 | dev->get_encap_res = 0; |
| 305 | dev->resp_avail = 0; |
| 306 | dev->set_ctrl_line_sts = 0; |
| 307 | dev->notify_ser_state = 0; |
| 308 | |
| 309 | return ctrl_bridge_start_read(dev); |
| 310 | } |
| 311 | EXPORT_SYMBOL(ctrl_bridge_open); |
| 312 | |
| 313 | void ctrl_bridge_close(unsigned int id) |
| 314 | { |
| 315 | struct ctrl_bridge *dev; |
| 316 | |
| 317 | if (id >= MAX_BRIDGE_DEVICES) |
| 318 | return; |
| 319 | |
| 320 | dev = __dev[id]; |
Jack Pham | a7c9267 | 2011-11-29 16:38:21 -0800 | [diff] [blame] | 321 | if (!dev || !dev->brdg) |
Hemant Kumar | 14401d5 | 2011-11-03 16:40:32 -0700 | [diff] [blame] | 322 | return; |
| 323 | |
| 324 | dev_dbg(&dev->udev->dev, "%s:\n", __func__); |
| 325 | |
| 326 | ctrl_bridge_set_cbits(dev->brdg->ch_id, 0); |
| 327 | usb_unlink_anchored_urbs(&dev->tx_submitted); |
| 328 | ctrl_bridge_stop_read(dev); |
| 329 | |
| 330 | dev->brdg = NULL; |
| 331 | } |
| 332 | EXPORT_SYMBOL(ctrl_bridge_close); |
| 333 | |
| 334 | static void ctrl_write_callback(struct urb *urb) |
| 335 | { |
Hemant Kumar | f13358e | 2012-01-19 12:07:20 -0800 | [diff] [blame] | 336 | struct ctrl_bridge *dev = urb->context; |
Hemant Kumar | 14401d5 | 2011-11-03 16:40:32 -0700 | [diff] [blame] | 337 | |
| 338 | if (urb->status) { |
| 339 | pr_debug("Write status/size %d/%d\n", |
| 340 | urb->status, urb->actual_length); |
| 341 | } |
| 342 | |
| 343 | kfree(urb->transfer_buffer); |
| 344 | kfree(urb->setup_packet); |
| 345 | usb_free_urb(urb); |
Hemant Kumar | f13358e | 2012-01-19 12:07:20 -0800 | [diff] [blame] | 346 | usb_autopm_put_interface_async(dev->intf); |
Hemant Kumar | 14401d5 | 2011-11-03 16:40:32 -0700 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | int ctrl_bridge_write(unsigned int id, char *data, size_t size) |
| 350 | { |
| 351 | int result; |
| 352 | struct urb *writeurb; |
| 353 | struct usb_ctrlrequest *out_ctlreq; |
| 354 | struct usb_device *udev; |
| 355 | struct ctrl_bridge *dev; |
| 356 | |
| 357 | if (id >= MAX_BRIDGE_DEVICES) { |
| 358 | result = -EINVAL; |
| 359 | goto free_data; |
| 360 | } |
| 361 | |
| 362 | dev = __dev[id]; |
| 363 | |
| 364 | if (!dev) { |
| 365 | result = -ENODEV; |
| 366 | goto free_data; |
| 367 | } |
| 368 | |
| 369 | udev = interface_to_usbdev(dev->intf); |
| 370 | |
| 371 | dev_dbg(&udev->dev, "%s:[id]:%u: write (%d bytes)\n", |
| 372 | __func__, id, size); |
| 373 | |
| 374 | writeurb = usb_alloc_urb(0, GFP_ATOMIC); |
| 375 | if (!writeurb) { |
| 376 | dev_err(&udev->dev, "%s: error allocating read urb\n", |
| 377 | __func__); |
| 378 | result = -ENOMEM; |
| 379 | goto free_data; |
| 380 | } |
| 381 | |
| 382 | out_ctlreq = kmalloc(sizeof(*out_ctlreq), GFP_ATOMIC); |
| 383 | if (!out_ctlreq) { |
| 384 | dev_err(&udev->dev, |
| 385 | "%s: error allocating setup packet buffer\n", |
| 386 | __func__); |
| 387 | result = -ENOMEM; |
| 388 | goto free_urb; |
| 389 | } |
| 390 | |
| 391 | /* CDC Send Encapsulated Request packet */ |
| 392 | out_ctlreq->bRequestType = (USB_DIR_OUT | USB_TYPE_CLASS | |
| 393 | USB_RECIP_INTERFACE); |
| 394 | if (!data && !size) { |
| 395 | out_ctlreq->bRequest = USB_CDC_REQ_SET_CONTROL_LINE_STATE; |
| 396 | out_ctlreq->wValue = dev->cbits_tomdm; |
| 397 | dev->set_ctrl_line_sts++; |
| 398 | } else { |
| 399 | out_ctlreq->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; |
| 400 | out_ctlreq->wValue = 0; |
| 401 | dev->snd_encap_cmd++; |
| 402 | } |
| 403 | out_ctlreq->wIndex = |
| 404 | dev->intf->cur_altsetting->desc.bInterfaceNumber; |
| 405 | out_ctlreq->wLength = cpu_to_le16(size); |
| 406 | |
| 407 | usb_fill_control_urb(writeurb, udev, |
| 408 | usb_sndctrlpipe(udev, 0), |
| 409 | (unsigned char *)out_ctlreq, |
| 410 | (void *)data, size, |
Hemant Kumar | f13358e | 2012-01-19 12:07:20 -0800 | [diff] [blame] | 411 | ctrl_write_callback, dev); |
Hemant Kumar | 14401d5 | 2011-11-03 16:40:32 -0700 | [diff] [blame] | 412 | |
| 413 | result = usb_autopm_get_interface_async(dev->intf); |
| 414 | if (result < 0) { |
| 415 | dev_err(&udev->dev, "%s: unable to resume interface: %d\n", |
| 416 | __func__, result); |
| 417 | |
| 418 | /* |
| 419 | * Revisit: if (result == -EPERM) |
| 420 | * bridge_suspend(dev->intf, PMSG_SUSPEND); |
| 421 | */ |
| 422 | |
| 423 | goto free_ctrlreq; |
| 424 | } |
| 425 | |
| 426 | usb_anchor_urb(writeurb, &dev->tx_submitted); |
| 427 | result = usb_submit_urb(writeurb, GFP_ATOMIC); |
| 428 | if (result < 0) { |
| 429 | dev_err(&udev->dev, "%s: submit URB error %d\n", |
| 430 | __func__, result); |
| 431 | usb_autopm_put_interface_async(dev->intf); |
| 432 | goto unanchor_urb; |
| 433 | } |
| 434 | |
| 435 | return size; |
| 436 | |
| 437 | unanchor_urb: |
| 438 | usb_unanchor_urb(writeurb); |
| 439 | free_ctrlreq: |
| 440 | kfree(out_ctlreq); |
| 441 | free_urb: |
| 442 | usb_free_urb(writeurb); |
| 443 | free_data: |
| 444 | kfree(data); |
| 445 | |
| 446 | return result; |
| 447 | } |
| 448 | EXPORT_SYMBOL(ctrl_bridge_write); |
| 449 | |
| 450 | int ctrl_bridge_suspend(unsigned int id) |
| 451 | { |
| 452 | struct ctrl_bridge *dev; |
| 453 | |
| 454 | if (id >= MAX_BRIDGE_DEVICES) |
| 455 | return -EINVAL; |
| 456 | |
| 457 | dev = __dev[id]; |
| 458 | if (!dev) |
| 459 | return -ENODEV; |
| 460 | |
| 461 | usb_kill_anchored_urbs(&dev->tx_submitted); |
| 462 | |
| 463 | return ctrl_bridge_stop_read(dev); |
| 464 | } |
| 465 | |
| 466 | int ctrl_bridge_resume(unsigned int id) |
| 467 | { |
| 468 | struct ctrl_bridge *dev; |
| 469 | |
| 470 | if (id >= MAX_BRIDGE_DEVICES) |
| 471 | return -EINVAL; |
| 472 | |
| 473 | dev = __dev[id]; |
| 474 | if (!dev) |
| 475 | return -ENODEV; |
| 476 | |
| 477 | return ctrl_bridge_start_read(dev); |
| 478 | } |
| 479 | |
| 480 | #if defined(CONFIG_DEBUG_FS) |
| 481 | #define DEBUG_BUF_SIZE 1024 |
| 482 | static ssize_t ctrl_bridge_read_stats(struct file *file, char __user *ubuf, |
| 483 | size_t count, loff_t *ppos) |
| 484 | { |
| 485 | struct ctrl_bridge *dev; |
| 486 | char *buf; |
| 487 | int ret; |
| 488 | int i; |
| 489 | int temp = 0; |
| 490 | |
| 491 | buf = kzalloc(sizeof(char) * DEBUG_BUF_SIZE, GFP_KERNEL); |
| 492 | if (!buf) |
| 493 | return -ENOMEM; |
| 494 | |
| 495 | for (i = 0; i < ch_id; i++) { |
| 496 | dev = __dev[i]; |
| 497 | if (!dev) |
| 498 | continue; |
| 499 | |
| 500 | temp += scnprintf(buf + temp, DEBUG_BUF_SIZE - temp, |
| 501 | "\nName#%s dev %p\n" |
| 502 | "snd encap cmd cnt: %u\n" |
| 503 | "get encap res cnt: %u\n" |
| 504 | "res available cnt: %u\n" |
| 505 | "set ctrlline sts cnt: %u\n" |
| 506 | "notify ser state cnt: %u\n" |
| 507 | "cbits_tomdm: %d\n" |
| 508 | "cbits_tohost: %d\n", |
| 509 | dev->pdev->name, dev, |
| 510 | dev->snd_encap_cmd, |
| 511 | dev->get_encap_res, |
| 512 | dev->resp_avail, |
| 513 | dev->set_ctrl_line_sts, |
| 514 | dev->notify_ser_state, |
| 515 | dev->cbits_tomdm, |
| 516 | dev->cbits_tohost); |
| 517 | |
| 518 | } |
| 519 | |
| 520 | ret = simple_read_from_buffer(ubuf, count, ppos, buf, temp); |
| 521 | |
| 522 | kfree(buf); |
| 523 | |
| 524 | return ret; |
| 525 | } |
| 526 | |
| 527 | static ssize_t ctrl_bridge_reset_stats(struct file *file, |
| 528 | const char __user *buf, size_t count, loff_t *ppos) |
| 529 | { |
| 530 | struct ctrl_bridge *dev; |
| 531 | int i; |
| 532 | |
| 533 | for (i = 0; i < ch_id; i++) { |
| 534 | dev = __dev[i]; |
| 535 | if (!dev) |
| 536 | continue; |
| 537 | |
| 538 | dev->snd_encap_cmd = 0; |
| 539 | dev->get_encap_res = 0; |
| 540 | dev->resp_avail = 0; |
| 541 | dev->set_ctrl_line_sts = 0; |
| 542 | dev->notify_ser_state = 0; |
| 543 | } |
| 544 | return count; |
| 545 | } |
| 546 | |
| 547 | const struct file_operations ctrl_stats_ops = { |
| 548 | .read = ctrl_bridge_read_stats, |
| 549 | .write = ctrl_bridge_reset_stats, |
| 550 | }; |
| 551 | |
| 552 | struct dentry *ctrl_dent; |
| 553 | struct dentry *ctrl_dfile; |
| 554 | static void ctrl_bridge_debugfs_init(void) |
| 555 | { |
| 556 | ctrl_dent = debugfs_create_dir("ctrl_hsic_bridge", 0); |
| 557 | if (IS_ERR(ctrl_dent)) |
| 558 | return; |
| 559 | |
| 560 | ctrl_dfile = |
| 561 | debugfs_create_file("status", 0644, ctrl_dent, 0, |
| 562 | &ctrl_stats_ops); |
| 563 | if (!ctrl_dfile || IS_ERR(ctrl_dfile)) |
| 564 | debugfs_remove(ctrl_dent); |
| 565 | } |
| 566 | |
| 567 | static void ctrl_bridge_debugfs_exit(void) |
| 568 | { |
| 569 | debugfs_remove(ctrl_dfile); |
| 570 | debugfs_remove(ctrl_dent); |
| 571 | } |
| 572 | |
| 573 | #else |
| 574 | static void ctrl_bridge_debugfs_init(void) { } |
| 575 | static void ctrl_bridge_debugfs_exit(void) { } |
| 576 | #endif |
| 577 | |
| 578 | int |
| 579 | ctrl_bridge_probe(struct usb_interface *ifc, struct usb_host_endpoint *int_in, |
| 580 | int id) |
| 581 | { |
| 582 | struct ctrl_bridge *dev; |
| 583 | struct usb_device *udev; |
| 584 | struct usb_endpoint_descriptor *ep; |
| 585 | u16 wMaxPacketSize; |
| 586 | int retval = 0; |
| 587 | int interval; |
| 588 | |
| 589 | udev = interface_to_usbdev(ifc); |
| 590 | |
| 591 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 592 | if (!dev) { |
| 593 | dev_err(&udev->dev, "%s: unable to allocate dev\n", |
| 594 | __func__); |
| 595 | return -ENOMEM; |
| 596 | } |
| 597 | dev->pdev = platform_device_alloc(ctrl_bridge_names[id], id); |
| 598 | if (!dev->pdev) { |
| 599 | dev_err(&dev->udev->dev, |
| 600 | "%s: unable to allocate platform device\n", __func__); |
| 601 | retval = -ENOMEM; |
| 602 | goto nomem; |
| 603 | } |
| 604 | |
| 605 | dev->udev = udev; |
| 606 | dev->int_pipe = usb_rcvintpipe(udev, |
| 607 | int_in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); |
| 608 | dev->intf = ifc; |
| 609 | |
| 610 | init_usb_anchor(&dev->tx_submitted); |
| 611 | |
| 612 | /*use max pkt size from ep desc*/ |
| 613 | ep = &dev->intf->cur_altsetting->endpoint[0].desc; |
| 614 | |
| 615 | dev->inturb = usb_alloc_urb(0, GFP_KERNEL); |
| 616 | if (!dev->inturb) { |
| 617 | dev_err(&udev->dev, "%s: error allocating int urb\n", __func__); |
| 618 | retval = -ENOMEM; |
| 619 | goto pdev_del; |
| 620 | } |
| 621 | |
| 622 | wMaxPacketSize = le16_to_cpu(ep->wMaxPacketSize); |
| 623 | |
| 624 | dev->intbuf = kmalloc(wMaxPacketSize, GFP_KERNEL); |
| 625 | if (!dev->intbuf) { |
| 626 | dev_err(&udev->dev, "%s: error allocating int buffer\n", |
| 627 | __func__); |
| 628 | retval = -ENOMEM; |
| 629 | goto free_inturb; |
| 630 | } |
| 631 | |
| 632 | interval = |
| 633 | (udev->speed == USB_SPEED_HIGH) ? HS_INTERVAL : FS_LS_INTERVAL; |
| 634 | |
| 635 | usb_fill_int_urb(dev->inturb, udev, dev->int_pipe, |
| 636 | dev->intbuf, wMaxPacketSize, |
| 637 | notification_available_cb, dev, interval); |
| 638 | |
| 639 | dev->readurb = usb_alloc_urb(0, GFP_KERNEL); |
| 640 | if (!dev->readurb) { |
| 641 | dev_err(&udev->dev, "%s: error allocating read urb\n", |
| 642 | __func__); |
| 643 | retval = -ENOMEM; |
| 644 | goto free_intbuf; |
| 645 | } |
| 646 | |
| 647 | dev->readbuf = kmalloc(DEFAULT_READ_URB_LENGTH, GFP_KERNEL); |
| 648 | if (!dev->readbuf) { |
| 649 | dev_err(&udev->dev, "%s: error allocating read buffer\n", |
| 650 | __func__); |
| 651 | retval = -ENOMEM; |
| 652 | goto free_rurb; |
| 653 | } |
| 654 | |
| 655 | dev->in_ctlreq = kmalloc(sizeof(*dev->in_ctlreq), GFP_KERNEL); |
| 656 | if (!dev->in_ctlreq) { |
| 657 | dev_err(&udev->dev, |
| 658 | "%s:error allocating setup packet buffer\n", |
| 659 | __func__); |
| 660 | retval = -ENOMEM; |
| 661 | goto free_rbuf; |
| 662 | } |
| 663 | |
| 664 | dev->in_ctlreq->bRequestType = |
| 665 | (USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE); |
| 666 | dev->in_ctlreq->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; |
| 667 | dev->in_ctlreq->wValue = 0; |
| 668 | dev->in_ctlreq->wIndex = |
| 669 | dev->intf->cur_altsetting->desc.bInterfaceNumber; |
| 670 | dev->in_ctlreq->wLength = cpu_to_le16(DEFAULT_READ_URB_LENGTH); |
| 671 | |
| 672 | __dev[id] = dev; |
| 673 | |
| 674 | platform_device_add(dev->pdev); |
| 675 | |
| 676 | ch_id++; |
| 677 | |
| 678 | return retval; |
| 679 | |
| 680 | free_rbuf: |
| 681 | kfree(dev->readbuf); |
| 682 | free_rurb: |
| 683 | usb_free_urb(dev->readurb); |
| 684 | free_intbuf: |
| 685 | kfree(dev->intbuf); |
| 686 | free_inturb: |
| 687 | usb_free_urb(dev->inturb); |
| 688 | pdev_del: |
| 689 | platform_device_del(dev->pdev); |
| 690 | nomem: |
| 691 | kfree(dev); |
| 692 | |
| 693 | return retval; |
| 694 | } |
| 695 | |
| 696 | void ctrl_bridge_disconnect(unsigned int id) |
| 697 | { |
| 698 | struct ctrl_bridge *dev = __dev[id]; |
| 699 | |
| 700 | dev_dbg(&dev->udev->dev, "%s:\n", __func__); |
| 701 | |
Jack Pham | 452c692 | 2011-12-14 18:15:26 -0800 | [diff] [blame] | 702 | platform_device_del(dev->pdev); |
| 703 | |
Hemant Kumar | 14401d5 | 2011-11-03 16:40:32 -0700 | [diff] [blame] | 704 | kfree(dev->in_ctlreq); |
| 705 | kfree(dev->readbuf); |
| 706 | kfree(dev->intbuf); |
| 707 | |
| 708 | usb_free_urb(dev->readurb); |
| 709 | usb_free_urb(dev->inturb); |
| 710 | |
Hemant Kumar | 14401d5 | 2011-11-03 16:40:32 -0700 | [diff] [blame] | 711 | __dev[id] = NULL; |
| 712 | ch_id--; |
| 713 | |
| 714 | kfree(dev); |
| 715 | } |
| 716 | |
| 717 | static int __init ctrl_bridge_init(void) |
| 718 | { |
| 719 | ctrl_bridge_debugfs_init(); |
| 720 | |
| 721 | return 0; |
| 722 | } |
| 723 | module_init(ctrl_bridge_init); |
| 724 | |
| 725 | static void __exit ctrl_bridge_exit(void) |
| 726 | { |
| 727 | ctrl_bridge_debugfs_exit(); |
| 728 | } |
| 729 | module_exit(ctrl_bridge_exit); |
| 730 | |
| 731 | MODULE_DESCRIPTION("Qualcomm modem control bridge driver"); |
| 732 | MODULE_LICENSE("GPL v2"); |