| 1 | /* |
| 2 | * cdc-acm.c |
| 3 | * |
| 4 | * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> |
| 5 | * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> |
| 6 | * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> |
| 7 | * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> |
| 8 | * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> |
| 9 | * Copyright (c) 2005 David Kubicek <dave@awk.cz> |
| 10 | * |
| 11 | * USB Abstract Control Model driver for USB modems and ISDN adapters |
| 12 | * |
| 13 | * Sponsored by SuSE |
| 14 | * |
| 15 | * ChangeLog: |
| 16 | * v0.9 - thorough cleaning, URBification, almost a rewrite |
| 17 | * v0.10 - some more cleanups |
| 18 | * v0.11 - fixed flow control, read error doesn't stop reads |
| 19 | * v0.12 - added TIOCM ioctls, added break handling, made struct acm |
| 20 | * kmalloced |
| 21 | * v0.13 - added termios, added hangup |
| 22 | * v0.14 - sized down struct acm |
| 23 | * v0.15 - fixed flow control again - characters could be lost |
| 24 | * v0.16 - added code for modems with swapped data and control interfaces |
| 25 | * v0.17 - added new style probing |
| 26 | * v0.18 - fixed new style probing for devices with more configurations |
| 27 | * v0.19 - fixed CLOCAL handling (thanks to Richard Shih-Ping Chan) |
| 28 | * v0.20 - switched to probing on interface (rather than device) class |
| 29 | * v0.21 - revert to probing on device for devices with multiple configs |
| 30 | * v0.22 - probe only the control interface. if usbcore doesn't choose the |
| 31 | * config we want, sysadmin changes bConfigurationValue in sysfs. |
| 32 | * v0.23 - use softirq for rx processing, as needed by tty layer |
| 33 | * v0.24 - change probe method to evaluate CDC union descriptor |
| 34 | * v0.25 - downstream tasks paralelized to maximize throughput |
| 35 | * v0.26 - multiple write urbs, writesize increased |
| 36 | */ |
| 37 | |
| 38 | /* |
| 39 | * This program is free software; you can redistribute it and/or modify |
| 40 | * it under the terms of the GNU General Public License as published by |
| 41 | * the Free Software Foundation; either version 2 of the License, or |
| 42 | * (at your option) any later version. |
| 43 | * |
| 44 | * This program is distributed in the hope that it will be useful, |
| 45 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 46 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 47 | * GNU General Public License for more details. |
| 48 | * |
| 49 | * You should have received a copy of the GNU General Public License |
| 50 | * along with this program; if not, write to the Free Software |
| 51 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 52 | */ |
| 53 | |
| 54 | #undef DEBUG |
| 55 | #undef VERBOSE_DEBUG |
| 56 | |
| 57 | #include <linux/kernel.h> |
| 58 | #include <linux/errno.h> |
| 59 | #include <linux/init.h> |
| 60 | #include <linux/slab.h> |
| 61 | #include <linux/tty.h> |
| 62 | #include <linux/serial.h> |
| 63 | #include <linux/tty_driver.h> |
| 64 | #include <linux/tty_flip.h> |
| 65 | #include <linux/module.h> |
| 66 | #include <linux/mutex.h> |
| 67 | #include <linux/uaccess.h> |
| 68 | #include <linux/usb.h> |
| 69 | #include <linux/usb/cdc.h> |
| 70 | #include <asm/byteorder.h> |
| 71 | #include <asm/unaligned.h> |
| 72 | #include <linux/list.h> |
| 73 | |
| 74 | #include "cdc-acm.h" |
| 75 | |
| 76 | |
| 77 | #define ACM_CLOSE_TIMEOUT 15 /* seconds to let writes drain */ |
| 78 | |
| 79 | /* |
| 80 | * Version Information |
| 81 | */ |
| 82 | #define DRIVER_VERSION "v0.26" |
| 83 | #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek" |
| 84 | #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" |
| 85 | |
| 86 | static struct usb_driver acm_driver; |
| 87 | static struct tty_driver *acm_tty_driver; |
| 88 | static struct acm *acm_table[ACM_TTY_MINORS]; |
| 89 | |
| 90 | static DEFINE_MUTEX(open_mutex); |
| 91 | |
| 92 | #define ACM_READY(acm) (acm && acm->dev && acm->port.count) |
| 93 | |
| 94 | static const struct tty_port_operations acm_port_ops = { |
| 95 | }; |
| 96 | |
| 97 | #ifdef VERBOSE_DEBUG |
| 98 | #define verbose 1 |
| 99 | #else |
| 100 | #define verbose 0 |
| 101 | #endif |
| 102 | |
| 103 | /* |
| 104 | * Functions for ACM control messages. |
| 105 | */ |
| 106 | |
| 107 | static int acm_ctrl_msg(struct acm *acm, int request, int value, |
| 108 | void *buf, int len) |
| 109 | { |
| 110 | int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), |
| 111 | request, USB_RT_ACM, value, |
| 112 | acm->control->altsetting[0].desc.bInterfaceNumber, |
| 113 | buf, len, 5000); |
| 114 | dbg("acm_control_msg: rq: 0x%02x val: %#x len: %#x result: %d", |
| 115 | request, value, len, retval); |
| 116 | return retval < 0 ? retval : 0; |
| 117 | } |
| 118 | |
| 119 | /* devices aren't required to support these requests. |
| 120 | * the cdc acm descriptor tells whether they do... |
| 121 | */ |
| 122 | #define acm_set_control(acm, control) \ |
| 123 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0) |
| 124 | #define acm_set_line(acm, line) \ |
| 125 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) |
| 126 | #define acm_send_break(acm, ms) \ |
| 127 | acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) |
| 128 | |
| 129 | /* |
| 130 | * Write buffer management. |
| 131 | * All of these assume proper locks taken by the caller. |
| 132 | */ |
| 133 | |
| 134 | static int acm_wb_alloc(struct acm *acm) |
| 135 | { |
| 136 | int i, wbn; |
| 137 | struct acm_wb *wb; |
| 138 | |
| 139 | wbn = 0; |
| 140 | i = 0; |
| 141 | for (;;) { |
| 142 | wb = &acm->wb[wbn]; |
| 143 | if (!wb->use) { |
| 144 | wb->use = 1; |
| 145 | return wbn; |
| 146 | } |
| 147 | wbn = (wbn + 1) % ACM_NW; |
| 148 | if (++i >= ACM_NW) |
| 149 | return -1; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | static int acm_wb_is_avail(struct acm *acm) |
| 154 | { |
| 155 | int i, n; |
| 156 | unsigned long flags; |
| 157 | |
| 158 | n = ACM_NW; |
| 159 | spin_lock_irqsave(&acm->write_lock, flags); |
| 160 | for (i = 0; i < ACM_NW; i++) |
| 161 | n -= acm->wb[i].use; |
| 162 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 163 | return n; |
| 164 | } |
| 165 | |
| 166 | /* |
| 167 | * Finish write. Caller must hold acm->write_lock |
| 168 | */ |
| 169 | static void acm_write_done(struct acm *acm, struct acm_wb *wb) |
| 170 | { |
| 171 | wb->use = 0; |
| 172 | acm->transmitting--; |
| 173 | usb_autopm_put_interface_async(acm->control); |
| 174 | } |
| 175 | |
| 176 | /* |
| 177 | * Poke write. |
| 178 | * |
| 179 | * the caller is responsible for locking |
| 180 | */ |
| 181 | |
| 182 | static int acm_start_wb(struct acm *acm, struct acm_wb *wb) |
| 183 | { |
| 184 | int rc; |
| 185 | |
| 186 | acm->transmitting++; |
| 187 | |
| 188 | wb->urb->transfer_buffer = wb->buf; |
| 189 | wb->urb->transfer_dma = wb->dmah; |
| 190 | wb->urb->transfer_buffer_length = wb->len; |
| 191 | wb->urb->dev = acm->dev; |
| 192 | |
| 193 | rc = usb_submit_urb(wb->urb, GFP_ATOMIC); |
| 194 | if (rc < 0) { |
| 195 | dbg("usb_submit_urb(write bulk) failed: %d", rc); |
| 196 | acm_write_done(acm, wb); |
| 197 | } |
| 198 | return rc; |
| 199 | } |
| 200 | |
| 201 | static int acm_write_start(struct acm *acm, int wbn) |
| 202 | { |
| 203 | unsigned long flags; |
| 204 | struct acm_wb *wb = &acm->wb[wbn]; |
| 205 | int rc; |
| 206 | |
| 207 | spin_lock_irqsave(&acm->write_lock, flags); |
| 208 | if (!acm->dev) { |
| 209 | wb->use = 0; |
| 210 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 211 | return -ENODEV; |
| 212 | } |
| 213 | |
| 214 | dbg("%s susp_count: %d", __func__, acm->susp_count); |
| 215 | usb_autopm_get_interface_async(acm->control); |
| 216 | if (acm->susp_count) { |
| 217 | if (!acm->delayed_wb) |
| 218 | acm->delayed_wb = wb; |
| 219 | else |
| 220 | usb_autopm_put_interface_async(acm->control); |
| 221 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 222 | return 0; /* A white lie */ |
| 223 | } |
| 224 | usb_mark_last_busy(acm->dev); |
| 225 | |
| 226 | rc = acm_start_wb(acm, wb); |
| 227 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 228 | |
| 229 | return rc; |
| 230 | |
| 231 | } |
| 232 | /* |
| 233 | * attributes exported through sysfs |
| 234 | */ |
| 235 | static ssize_t show_caps |
| 236 | (struct device *dev, struct device_attribute *attr, char *buf) |
| 237 | { |
| 238 | struct usb_interface *intf = to_usb_interface(dev); |
| 239 | struct acm *acm = usb_get_intfdata(intf); |
| 240 | |
| 241 | return sprintf(buf, "%d", acm->ctrl_caps); |
| 242 | } |
| 243 | static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); |
| 244 | |
| 245 | static ssize_t show_country_codes |
| 246 | (struct device *dev, struct device_attribute *attr, char *buf) |
| 247 | { |
| 248 | struct usb_interface *intf = to_usb_interface(dev); |
| 249 | struct acm *acm = usb_get_intfdata(intf); |
| 250 | |
| 251 | memcpy(buf, acm->country_codes, acm->country_code_size); |
| 252 | return acm->country_code_size; |
| 253 | } |
| 254 | |
| 255 | static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); |
| 256 | |
| 257 | static ssize_t show_country_rel_date |
| 258 | (struct device *dev, struct device_attribute *attr, char *buf) |
| 259 | { |
| 260 | struct usb_interface *intf = to_usb_interface(dev); |
| 261 | struct acm *acm = usb_get_intfdata(intf); |
| 262 | |
| 263 | return sprintf(buf, "%d", acm->country_rel_date); |
| 264 | } |
| 265 | |
| 266 | static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); |
| 267 | /* |
| 268 | * Interrupt handlers for various ACM device responses |
| 269 | */ |
| 270 | |
| 271 | /* control interface reports status changes with "interrupt" transfers */ |
| 272 | static void acm_ctrl_irq(struct urb *urb) |
| 273 | { |
| 274 | struct acm *acm = urb->context; |
| 275 | struct usb_cdc_notification *dr = urb->transfer_buffer; |
| 276 | struct tty_struct *tty; |
| 277 | unsigned char *data; |
| 278 | int newctrl; |
| 279 | int retval; |
| 280 | int status = urb->status; |
| 281 | |
| 282 | switch (status) { |
| 283 | case 0: |
| 284 | /* success */ |
| 285 | break; |
| 286 | case -ECONNRESET: |
| 287 | case -ENOENT: |
| 288 | case -ESHUTDOWN: |
| 289 | /* this urb is terminated, clean up */ |
| 290 | dbg("%s - urb shutting down with status: %d", __func__, status); |
| 291 | return; |
| 292 | default: |
| 293 | dbg("%s - nonzero urb status received: %d", __func__, status); |
| 294 | goto exit; |
| 295 | } |
| 296 | |
| 297 | if (!ACM_READY(acm)) |
| 298 | goto exit; |
| 299 | |
| 300 | data = (unsigned char *)(dr + 1); |
| 301 | switch (dr->bNotificationType) { |
| 302 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: |
| 303 | dbg("%s network", dr->wValue ? |
| 304 | "connected to" : "disconnected from"); |
| 305 | break; |
| 306 | |
| 307 | case USB_CDC_NOTIFY_SERIAL_STATE: |
| 308 | tty = tty_port_tty_get(&acm->port); |
| 309 | newctrl = get_unaligned_le16(data); |
| 310 | |
| 311 | if (tty) { |
| 312 | if (!acm->clocal && |
| 313 | (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { |
| 314 | dbg("calling hangup"); |
| 315 | tty_hangup(tty); |
| 316 | } |
| 317 | tty_kref_put(tty); |
| 318 | } |
| 319 | |
| 320 | acm->ctrlin = newctrl; |
| 321 | |
| 322 | dbg("input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c", |
| 323 | acm->ctrlin & ACM_CTRL_DCD ? '+' : '-', |
| 324 | acm->ctrlin & ACM_CTRL_DSR ? '+' : '-', |
| 325 | acm->ctrlin & ACM_CTRL_BRK ? '+' : '-', |
| 326 | acm->ctrlin & ACM_CTRL_RI ? '+' : '-', |
| 327 | acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-', |
| 328 | acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-', |
| 329 | acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-'); |
| 330 | break; |
| 331 | |
| 332 | default: |
| 333 | dbg("unknown notification %d received: index %d len %d data0 %d data1 %d", |
| 334 | dr->bNotificationType, dr->wIndex, |
| 335 | dr->wLength, data[0], data[1]); |
| 336 | break; |
| 337 | } |
| 338 | exit: |
| 339 | usb_mark_last_busy(acm->dev); |
| 340 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
| 341 | if (retval) |
| 342 | dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with " |
| 343 | "result %d", __func__, retval); |
| 344 | } |
| 345 | |
| 346 | /* data interface returns incoming bytes, or we got unthrottled */ |
| 347 | static void acm_read_bulk(struct urb *urb) |
| 348 | { |
| 349 | struct acm_rb *buf; |
| 350 | struct acm_ru *rcv = urb->context; |
| 351 | struct acm *acm = rcv->instance; |
| 352 | int status = urb->status; |
| 353 | |
| 354 | dbg("Entering acm_read_bulk with status %d", status); |
| 355 | |
| 356 | if (!ACM_READY(acm)) { |
| 357 | dev_dbg(&acm->data->dev, "Aborting, acm not ready"); |
| 358 | return; |
| 359 | } |
| 360 | usb_mark_last_busy(acm->dev); |
| 361 | |
| 362 | if (status) |
| 363 | dev_dbg(&acm->data->dev, "bulk rx status %d\n", status); |
| 364 | |
| 365 | buf = rcv->buffer; |
| 366 | buf->size = urb->actual_length; |
| 367 | |
| 368 | if (likely(status == 0)) { |
| 369 | spin_lock(&acm->read_lock); |
| 370 | acm->processing++; |
| 371 | list_add_tail(&rcv->list, &acm->spare_read_urbs); |
| 372 | list_add_tail(&buf->list, &acm->filled_read_bufs); |
| 373 | spin_unlock(&acm->read_lock); |
| 374 | } else { |
| 375 | /* we drop the buffer due to an error */ |
| 376 | spin_lock(&acm->read_lock); |
| 377 | list_add_tail(&rcv->list, &acm->spare_read_urbs); |
| 378 | list_add(&buf->list, &acm->spare_read_bufs); |
| 379 | spin_unlock(&acm->read_lock); |
| 380 | /* nevertheless the tasklet must be kicked unconditionally |
| 381 | so the queue cannot dry up */ |
| 382 | } |
| 383 | if (likely(!acm->susp_count)) |
| 384 | tasklet_schedule(&acm->urb_task); |
| 385 | } |
| 386 | |
| 387 | static void acm_rx_tasklet(unsigned long _acm) |
| 388 | { |
| 389 | struct acm *acm = (void *)_acm; |
| 390 | struct acm_rb *buf; |
| 391 | struct tty_struct *tty; |
| 392 | struct acm_ru *rcv; |
| 393 | unsigned long flags; |
| 394 | unsigned char throttled; |
| 395 | |
| 396 | dbg("Entering acm_rx_tasklet"); |
| 397 | |
| 398 | if (!ACM_READY(acm)) { |
| 399 | dbg("acm_rx_tasklet: ACM not ready"); |
| 400 | return; |
| 401 | } |
| 402 | |
| 403 | spin_lock_irqsave(&acm->throttle_lock, flags); |
| 404 | throttled = acm->throttle; |
| 405 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
| 406 | if (throttled) { |
| 407 | dbg("acm_rx_tasklet: throttled"); |
| 408 | return; |
| 409 | } |
| 410 | |
| 411 | tty = tty_port_tty_get(&acm->port); |
| 412 | |
| 413 | next_buffer: |
| 414 | spin_lock_irqsave(&acm->read_lock, flags); |
| 415 | if (list_empty(&acm->filled_read_bufs)) { |
| 416 | spin_unlock_irqrestore(&acm->read_lock, flags); |
| 417 | goto urbs; |
| 418 | } |
| 419 | buf = list_entry(acm->filled_read_bufs.next, |
| 420 | struct acm_rb, list); |
| 421 | list_del(&buf->list); |
| 422 | spin_unlock_irqrestore(&acm->read_lock, flags); |
| 423 | |
| 424 | dbg("acm_rx_tasklet: procesing buf 0x%p, size = %d", buf, buf->size); |
| 425 | |
| 426 | if (tty) { |
| 427 | spin_lock_irqsave(&acm->throttle_lock, flags); |
| 428 | throttled = acm->throttle; |
| 429 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
| 430 | if (!throttled) { |
| 431 | tty_insert_flip_string(tty, buf->base, buf->size); |
| 432 | tty_flip_buffer_push(tty); |
| 433 | } else { |
| 434 | tty_kref_put(tty); |
| 435 | dbg("Throttling noticed"); |
| 436 | spin_lock_irqsave(&acm->read_lock, flags); |
| 437 | list_add(&buf->list, &acm->filled_read_bufs); |
| 438 | spin_unlock_irqrestore(&acm->read_lock, flags); |
| 439 | return; |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | spin_lock_irqsave(&acm->read_lock, flags); |
| 444 | list_add(&buf->list, &acm->spare_read_bufs); |
| 445 | spin_unlock_irqrestore(&acm->read_lock, flags); |
| 446 | goto next_buffer; |
| 447 | |
| 448 | urbs: |
| 449 | tty_kref_put(tty); |
| 450 | |
| 451 | while (!list_empty(&acm->spare_read_bufs)) { |
| 452 | spin_lock_irqsave(&acm->read_lock, flags); |
| 453 | if (list_empty(&acm->spare_read_urbs)) { |
| 454 | acm->processing = 0; |
| 455 | spin_unlock_irqrestore(&acm->read_lock, flags); |
| 456 | return; |
| 457 | } |
| 458 | rcv = list_entry(acm->spare_read_urbs.next, |
| 459 | struct acm_ru, list); |
| 460 | list_del(&rcv->list); |
| 461 | spin_unlock_irqrestore(&acm->read_lock, flags); |
| 462 | |
| 463 | buf = list_entry(acm->spare_read_bufs.next, |
| 464 | struct acm_rb, list); |
| 465 | list_del(&buf->list); |
| 466 | |
| 467 | rcv->buffer = buf; |
| 468 | |
| 469 | if (acm->is_int_ep) |
| 470 | usb_fill_int_urb(rcv->urb, acm->dev, |
| 471 | acm->rx_endpoint, |
| 472 | buf->base, |
| 473 | acm->readsize, |
| 474 | acm_read_bulk, rcv, acm->bInterval); |
| 475 | else |
| 476 | usb_fill_bulk_urb(rcv->urb, acm->dev, |
| 477 | acm->rx_endpoint, |
| 478 | buf->base, |
| 479 | acm->readsize, |
| 480 | acm_read_bulk, rcv); |
| 481 | rcv->urb->transfer_dma = buf->dma; |
| 482 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 483 | |
| 484 | /* This shouldn't kill the driver as unsuccessful URBs are |
| 485 | returned to the free-urbs-pool and resubmited ASAP */ |
| 486 | spin_lock_irqsave(&acm->read_lock, flags); |
| 487 | if (acm->susp_count || |
| 488 | usb_submit_urb(rcv->urb, GFP_ATOMIC) < 0) { |
| 489 | list_add(&buf->list, &acm->spare_read_bufs); |
| 490 | list_add(&rcv->list, &acm->spare_read_urbs); |
| 491 | acm->processing = 0; |
| 492 | spin_unlock_irqrestore(&acm->read_lock, flags); |
| 493 | return; |
| 494 | } else { |
| 495 | spin_unlock_irqrestore(&acm->read_lock, flags); |
| 496 | dbg("acm_rx_tasklet: sending urb 0x%p, rcv 0x%p, buf 0x%p", rcv->urb, rcv, buf); |
| 497 | } |
| 498 | } |
| 499 | spin_lock_irqsave(&acm->read_lock, flags); |
| 500 | acm->processing = 0; |
| 501 | spin_unlock_irqrestore(&acm->read_lock, flags); |
| 502 | } |
| 503 | |
| 504 | /* data interface wrote those outgoing bytes */ |
| 505 | static void acm_write_bulk(struct urb *urb) |
| 506 | { |
| 507 | struct acm_wb *wb = urb->context; |
| 508 | struct acm *acm = wb->instance; |
| 509 | unsigned long flags; |
| 510 | |
| 511 | if (verbose || urb->status |
| 512 | || (urb->actual_length != urb->transfer_buffer_length)) |
| 513 | dev_dbg(&acm->data->dev, "tx %d/%d bytes -- > %d\n", |
| 514 | urb->actual_length, |
| 515 | urb->transfer_buffer_length, |
| 516 | urb->status); |
| 517 | |
| 518 | spin_lock_irqsave(&acm->write_lock, flags); |
| 519 | acm_write_done(acm, wb); |
| 520 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 521 | if (ACM_READY(acm)) |
| 522 | schedule_work(&acm->work); |
| 523 | else |
| 524 | wake_up_interruptible(&acm->drain_wait); |
| 525 | } |
| 526 | |
| 527 | static void acm_softint(struct work_struct *work) |
| 528 | { |
| 529 | struct acm *acm = container_of(work, struct acm, work); |
| 530 | struct tty_struct *tty; |
| 531 | |
| 532 | dev_vdbg(&acm->data->dev, "tx work\n"); |
| 533 | if (!ACM_READY(acm)) |
| 534 | return; |
| 535 | tty = tty_port_tty_get(&acm->port); |
| 536 | tty_wakeup(tty); |
| 537 | tty_kref_put(tty); |
| 538 | } |
| 539 | |
| 540 | /* |
| 541 | * TTY handlers |
| 542 | */ |
| 543 | |
| 544 | static int acm_tty_open(struct tty_struct *tty, struct file *filp) |
| 545 | { |
| 546 | struct acm *acm; |
| 547 | int rv = -ENODEV; |
| 548 | int i; |
| 549 | dbg("Entering acm_tty_open."); |
| 550 | |
| 551 | mutex_lock(&open_mutex); |
| 552 | |
| 553 | acm = acm_table[tty->index]; |
| 554 | if (!acm || !acm->dev) |
| 555 | goto out; |
| 556 | else |
| 557 | rv = 0; |
| 558 | |
| 559 | set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); |
| 560 | |
| 561 | tty->driver_data = acm; |
| 562 | tty_port_tty_set(&acm->port, tty); |
| 563 | |
| 564 | if (usb_autopm_get_interface(acm->control) < 0) |
| 565 | goto early_bail; |
| 566 | else |
| 567 | acm->control->needs_remote_wakeup = 1; |
| 568 | |
| 569 | mutex_lock(&acm->mutex); |
| 570 | if (acm->port.count++) { |
| 571 | mutex_unlock(&acm->mutex); |
| 572 | usb_autopm_put_interface(acm->control); |
| 573 | goto out; |
| 574 | } |
| 575 | |
| 576 | acm->ctrlurb->dev = acm->dev; |
| 577 | if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { |
| 578 | dbg("usb_submit_urb(ctrl irq) failed"); |
| 579 | goto bail_out; |
| 580 | } |
| 581 | |
| 582 | if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) && |
| 583 | (acm->ctrl_caps & USB_CDC_CAP_LINE)) |
| 584 | goto full_bailout; |
| 585 | |
| 586 | usb_autopm_put_interface(acm->control); |
| 587 | |
| 588 | INIT_LIST_HEAD(&acm->spare_read_urbs); |
| 589 | INIT_LIST_HEAD(&acm->spare_read_bufs); |
| 590 | INIT_LIST_HEAD(&acm->filled_read_bufs); |
| 591 | |
| 592 | for (i = 0; i < acm->rx_buflimit; i++) |
| 593 | list_add(&(acm->ru[i].list), &acm->spare_read_urbs); |
| 594 | for (i = 0; i < acm->rx_buflimit; i++) |
| 595 | list_add(&(acm->rb[i].list), &acm->spare_read_bufs); |
| 596 | |
| 597 | acm->throttle = 0; |
| 598 | |
| 599 | set_bit(ASYNCB_INITIALIZED, &acm->port.flags); |
| 600 | rv = tty_port_block_til_ready(&acm->port, tty, filp); |
| 601 | tasklet_schedule(&acm->urb_task); |
| 602 | |
| 603 | mutex_unlock(&acm->mutex); |
| 604 | out: |
| 605 | mutex_unlock(&open_mutex); |
| 606 | return rv; |
| 607 | |
| 608 | full_bailout: |
| 609 | usb_kill_urb(acm->ctrlurb); |
| 610 | bail_out: |
| 611 | acm->port.count--; |
| 612 | mutex_unlock(&acm->mutex); |
| 613 | usb_autopm_put_interface(acm->control); |
| 614 | early_bail: |
| 615 | mutex_unlock(&open_mutex); |
| 616 | tty_port_tty_set(&acm->port, NULL); |
| 617 | return -EIO; |
| 618 | } |
| 619 | |
| 620 | static void acm_tty_unregister(struct acm *acm) |
| 621 | { |
| 622 | int i, nr; |
| 623 | |
| 624 | nr = acm->rx_buflimit; |
| 625 | tty_unregister_device(acm_tty_driver, acm->minor); |
| 626 | usb_put_intf(acm->control); |
| 627 | acm_table[acm->minor] = NULL; |
| 628 | usb_free_urb(acm->ctrlurb); |
| 629 | for (i = 0; i < ACM_NW; i++) |
| 630 | usb_free_urb(acm->wb[i].urb); |
| 631 | for (i = 0; i < nr; i++) |
| 632 | usb_free_urb(acm->ru[i].urb); |
| 633 | kfree(acm->country_codes); |
| 634 | kfree(acm); |
| 635 | } |
| 636 | |
| 637 | static int acm_tty_chars_in_buffer(struct tty_struct *tty); |
| 638 | |
| 639 | static void acm_port_down(struct acm *acm) |
| 640 | { |
| 641 | int i, nr = acm->rx_buflimit; |
| 642 | mutex_lock(&open_mutex); |
| 643 | if (acm->dev) { |
| 644 | usb_autopm_get_interface(acm->control); |
| 645 | acm_set_control(acm, acm->ctrlout = 0); |
| 646 | usb_kill_urb(acm->ctrlurb); |
| 647 | for (i = 0; i < ACM_NW; i++) |
| 648 | usb_kill_urb(acm->wb[i].urb); |
| 649 | for (i = 0; i < nr; i++) |
| 650 | usb_kill_urb(acm->ru[i].urb); |
| 651 | acm->control->needs_remote_wakeup = 0; |
| 652 | usb_autopm_put_interface(acm->control); |
| 653 | } |
| 654 | mutex_unlock(&open_mutex); |
| 655 | } |
| 656 | |
| 657 | static void acm_tty_hangup(struct tty_struct *tty) |
| 658 | { |
| 659 | struct acm *acm = tty->driver_data; |
| 660 | tty_port_hangup(&acm->port); |
| 661 | acm_port_down(acm); |
| 662 | } |
| 663 | |
| 664 | static void acm_tty_close(struct tty_struct *tty, struct file *filp) |
| 665 | { |
| 666 | struct acm *acm = tty->driver_data; |
| 667 | |
| 668 | /* Perform the closing process and see if we need to do the hardware |
| 669 | shutdown */ |
| 670 | if (!acm) |
| 671 | return; |
| 672 | if (tty_port_close_start(&acm->port, tty, filp) == 0) { |
| 673 | mutex_lock(&open_mutex); |
| 674 | if (!acm->dev) { |
| 675 | tty_port_tty_set(&acm->port, NULL); |
| 676 | acm_tty_unregister(acm); |
| 677 | tty->driver_data = NULL; |
| 678 | } |
| 679 | mutex_unlock(&open_mutex); |
| 680 | return; |
| 681 | } |
| 682 | acm_port_down(acm); |
| 683 | tty_port_close_end(&acm->port, tty); |
| 684 | tty_port_tty_set(&acm->port, NULL); |
| 685 | } |
| 686 | |
| 687 | static int acm_tty_write(struct tty_struct *tty, |
| 688 | const unsigned char *buf, int count) |
| 689 | { |
| 690 | struct acm *acm = tty->driver_data; |
| 691 | int stat; |
| 692 | unsigned long flags; |
| 693 | int wbn; |
| 694 | struct acm_wb *wb; |
| 695 | |
| 696 | dbg("Entering acm_tty_write to write %d bytes,", count); |
| 697 | |
| 698 | if (!ACM_READY(acm)) |
| 699 | return -EINVAL; |
| 700 | if (!count) |
| 701 | return 0; |
| 702 | |
| 703 | spin_lock_irqsave(&acm->write_lock, flags); |
| 704 | wbn = acm_wb_alloc(acm); |
| 705 | if (wbn < 0) { |
| 706 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 707 | return 0; |
| 708 | } |
| 709 | wb = &acm->wb[wbn]; |
| 710 | |
| 711 | count = (count > acm->writesize) ? acm->writesize : count; |
| 712 | dbg("Get %d bytes...", count); |
| 713 | memcpy(wb->buf, buf, count); |
| 714 | wb->len = count; |
| 715 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 716 | |
| 717 | stat = acm_write_start(acm, wbn); |
| 718 | if (stat < 0) |
| 719 | return stat; |
| 720 | return count; |
| 721 | } |
| 722 | |
| 723 | static int acm_tty_write_room(struct tty_struct *tty) |
| 724 | { |
| 725 | struct acm *acm = tty->driver_data; |
| 726 | if (!ACM_READY(acm)) |
| 727 | return -EINVAL; |
| 728 | /* |
| 729 | * Do not let the line discipline to know that we have a reserve, |
| 730 | * or it might get too enthusiastic. |
| 731 | */ |
| 732 | return acm_wb_is_avail(acm) ? acm->writesize : 0; |
| 733 | } |
| 734 | |
| 735 | static int acm_tty_chars_in_buffer(struct tty_struct *tty) |
| 736 | { |
| 737 | struct acm *acm = tty->driver_data; |
| 738 | if (!ACM_READY(acm)) |
| 739 | return 0; |
| 740 | /* |
| 741 | * This is inaccurate (overcounts), but it works. |
| 742 | */ |
| 743 | return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; |
| 744 | } |
| 745 | |
| 746 | static void acm_tty_throttle(struct tty_struct *tty) |
| 747 | { |
| 748 | struct acm *acm = tty->driver_data; |
| 749 | if (!ACM_READY(acm)) |
| 750 | return; |
| 751 | spin_lock_bh(&acm->throttle_lock); |
| 752 | acm->throttle = 1; |
| 753 | spin_unlock_bh(&acm->throttle_lock); |
| 754 | } |
| 755 | |
| 756 | static void acm_tty_unthrottle(struct tty_struct *tty) |
| 757 | { |
| 758 | struct acm *acm = tty->driver_data; |
| 759 | if (!ACM_READY(acm)) |
| 760 | return; |
| 761 | spin_lock_bh(&acm->throttle_lock); |
| 762 | acm->throttle = 0; |
| 763 | spin_unlock_bh(&acm->throttle_lock); |
| 764 | tasklet_schedule(&acm->urb_task); |
| 765 | } |
| 766 | |
| 767 | static int acm_tty_break_ctl(struct tty_struct *tty, int state) |
| 768 | { |
| 769 | struct acm *acm = tty->driver_data; |
| 770 | int retval; |
| 771 | if (!ACM_READY(acm)) |
| 772 | return -EINVAL; |
| 773 | retval = acm_send_break(acm, state ? 0xffff : 0); |
| 774 | if (retval < 0) |
| 775 | dbg("send break failed"); |
| 776 | return retval; |
| 777 | } |
| 778 | |
| 779 | static int acm_tty_tiocmget(struct tty_struct *tty, struct file *file) |
| 780 | { |
| 781 | struct acm *acm = tty->driver_data; |
| 782 | |
| 783 | if (!ACM_READY(acm)) |
| 784 | return -EINVAL; |
| 785 | |
| 786 | return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | |
| 787 | (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | |
| 788 | (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | |
| 789 | (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | |
| 790 | (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | |
| 791 | TIOCM_CTS; |
| 792 | } |
| 793 | |
| 794 | static int acm_tty_tiocmset(struct tty_struct *tty, struct file *file, |
| 795 | unsigned int set, unsigned int clear) |
| 796 | { |
| 797 | struct acm *acm = tty->driver_data; |
| 798 | unsigned int newctrl; |
| 799 | |
| 800 | if (!ACM_READY(acm)) |
| 801 | return -EINVAL; |
| 802 | |
| 803 | newctrl = acm->ctrlout; |
| 804 | set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | |
| 805 | (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); |
| 806 | clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | |
| 807 | (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); |
| 808 | |
| 809 | newctrl = (newctrl & ~clear) | set; |
| 810 | |
| 811 | if (acm->ctrlout == newctrl) |
| 812 | return 0; |
| 813 | return acm_set_control(acm, acm->ctrlout = newctrl); |
| 814 | } |
| 815 | |
| 816 | static int acm_tty_ioctl(struct tty_struct *tty, struct file *file, |
| 817 | unsigned int cmd, unsigned long arg) |
| 818 | { |
| 819 | struct acm *acm = tty->driver_data; |
| 820 | |
| 821 | if (!ACM_READY(acm)) |
| 822 | return -EINVAL; |
| 823 | |
| 824 | return -ENOIOCTLCMD; |
| 825 | } |
| 826 | |
| 827 | static const __u32 acm_tty_speed[] = { |
| 828 | 0, 50, 75, 110, 134, 150, 200, 300, 600, |
| 829 | 1200, 1800, 2400, 4800, 9600, 19200, 38400, |
| 830 | 57600, 115200, 230400, 460800, 500000, 576000, |
| 831 | 921600, 1000000, 1152000, 1500000, 2000000, |
| 832 | 2500000, 3000000, 3500000, 4000000 |
| 833 | }; |
| 834 | |
| 835 | static const __u8 acm_tty_size[] = { |
| 836 | 5, 6, 7, 8 |
| 837 | }; |
| 838 | |
| 839 | static void acm_tty_set_termios(struct tty_struct *tty, |
| 840 | struct ktermios *termios_old) |
| 841 | { |
| 842 | struct acm *acm = tty->driver_data; |
| 843 | struct ktermios *termios = tty->termios; |
| 844 | struct usb_cdc_line_coding newline; |
| 845 | int newctrl = acm->ctrlout; |
| 846 | |
| 847 | if (!ACM_READY(acm)) |
| 848 | return; |
| 849 | |
| 850 | newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); |
| 851 | newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; |
| 852 | newline.bParityType = termios->c_cflag & PARENB ? |
| 853 | (termios->c_cflag & PARODD ? 1 : 2) + |
| 854 | (termios->c_cflag & CMSPAR ? 2 : 0) : 0; |
| 855 | newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4]; |
| 856 | /* FIXME: Needs to clear unsupported bits in the termios */ |
| 857 | acm->clocal = ((termios->c_cflag & CLOCAL) != 0); |
| 858 | |
| 859 | if (!newline.dwDTERate) { |
| 860 | newline.dwDTERate = acm->line.dwDTERate; |
| 861 | newctrl &= ~ACM_CTRL_DTR; |
| 862 | } else |
| 863 | newctrl |= ACM_CTRL_DTR; |
| 864 | |
| 865 | if (newctrl != acm->ctrlout) |
| 866 | acm_set_control(acm, acm->ctrlout = newctrl); |
| 867 | |
| 868 | if (memcmp(&acm->line, &newline, sizeof newline)) { |
| 869 | memcpy(&acm->line, &newline, sizeof newline); |
| 870 | dbg("set line: %d %d %d %d", le32_to_cpu(newline.dwDTERate), |
| 871 | newline.bCharFormat, newline.bParityType, |
| 872 | newline.bDataBits); |
| 873 | acm_set_line(acm, &acm->line); |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | /* |
| 878 | * USB probe and disconnect routines. |
| 879 | */ |
| 880 | |
| 881 | /* Little helpers: write/read buffers free */ |
| 882 | static void acm_write_buffers_free(struct acm *acm) |
| 883 | { |
| 884 | int i; |
| 885 | struct acm_wb *wb; |
| 886 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); |
| 887 | |
| 888 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) |
| 889 | usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah); |
| 890 | } |
| 891 | |
| 892 | static void acm_read_buffers_free(struct acm *acm) |
| 893 | { |
| 894 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); |
| 895 | int i, n = acm->rx_buflimit; |
| 896 | |
| 897 | for (i = 0; i < n; i++) |
| 898 | usb_free_coherent(usb_dev, acm->readsize, |
| 899 | acm->rb[i].base, acm->rb[i].dma); |
| 900 | } |
| 901 | |
| 902 | /* Little helper: write buffers allocate */ |
| 903 | static int acm_write_buffers_alloc(struct acm *acm) |
| 904 | { |
| 905 | int i; |
| 906 | struct acm_wb *wb; |
| 907 | |
| 908 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
| 909 | wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, |
| 910 | &wb->dmah); |
| 911 | if (!wb->buf) { |
| 912 | while (i != 0) { |
| 913 | --i; |
| 914 | --wb; |
| 915 | usb_free_coherent(acm->dev, acm->writesize, |
| 916 | wb->buf, wb->dmah); |
| 917 | } |
| 918 | return -ENOMEM; |
| 919 | } |
| 920 | } |
| 921 | return 0; |
| 922 | } |
| 923 | |
| 924 | static int acm_probe(struct usb_interface *intf, |
| 925 | const struct usb_device_id *id) |
| 926 | { |
| 927 | struct usb_cdc_union_desc *union_header = NULL; |
| 928 | struct usb_cdc_country_functional_desc *cfd = NULL; |
| 929 | unsigned char *buffer = intf->altsetting->extra; |
| 930 | int buflen = intf->altsetting->extralen; |
| 931 | struct usb_interface *control_interface; |
| 932 | struct usb_interface *data_interface; |
| 933 | struct usb_endpoint_descriptor *epctrl = NULL; |
| 934 | struct usb_endpoint_descriptor *epread = NULL; |
| 935 | struct usb_endpoint_descriptor *epwrite = NULL; |
| 936 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
| 937 | struct acm *acm; |
| 938 | int minor; |
| 939 | int ctrlsize, readsize; |
| 940 | u8 *buf; |
| 941 | u8 ac_management_function = 0; |
| 942 | u8 call_management_function = 0; |
| 943 | int call_interface_num = -1; |
| 944 | int data_interface_num; |
| 945 | unsigned long quirks; |
| 946 | int num_rx_buf; |
| 947 | int i; |
| 948 | int combined_interfaces = 0; |
| 949 | |
| 950 | /* normal quirks */ |
| 951 | quirks = (unsigned long)id->driver_info; |
| 952 | num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; |
| 953 | |
| 954 | /* handle quirks deadly to normal probing*/ |
| 955 | if (quirks == NO_UNION_NORMAL) { |
| 956 | data_interface = usb_ifnum_to_if(usb_dev, 1); |
| 957 | control_interface = usb_ifnum_to_if(usb_dev, 0); |
| 958 | goto skip_normal_probe; |
| 959 | } |
| 960 | |
| 961 | /* normal probing*/ |
| 962 | if (!buffer) { |
| 963 | dev_err(&intf->dev, "Weird descriptor references\n"); |
| 964 | return -EINVAL; |
| 965 | } |
| 966 | |
| 967 | if (!buflen) { |
| 968 | if (intf->cur_altsetting->endpoint && |
| 969 | intf->cur_altsetting->endpoint->extralen && |
| 970 | intf->cur_altsetting->endpoint->extra) { |
| 971 | dev_dbg(&intf->dev, |
| 972 | "Seeking extra descriptors on endpoint\n"); |
| 973 | buflen = intf->cur_altsetting->endpoint->extralen; |
| 974 | buffer = intf->cur_altsetting->endpoint->extra; |
| 975 | } else { |
| 976 | dev_err(&intf->dev, |
| 977 | "Zero length descriptor references\n"); |
| 978 | return -EINVAL; |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | while (buflen > 0) { |
| 983 | if (buffer[1] != USB_DT_CS_INTERFACE) { |
| 984 | dev_err(&intf->dev, "skipping garbage\n"); |
| 985 | goto next_desc; |
| 986 | } |
| 987 | |
| 988 | switch (buffer[2]) { |
| 989 | case USB_CDC_UNION_TYPE: /* we've found it */ |
| 990 | if (union_header) { |
| 991 | dev_err(&intf->dev, "More than one " |
| 992 | "union descriptor, skipping ...\n"); |
| 993 | goto next_desc; |
| 994 | } |
| 995 | union_header = (struct usb_cdc_union_desc *)buffer; |
| 996 | break; |
| 997 | case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ |
| 998 | cfd = (struct usb_cdc_country_functional_desc *)buffer; |
| 999 | break; |
| 1000 | case USB_CDC_HEADER_TYPE: /* maybe check version */ |
| 1001 | break; /* for now we ignore it */ |
| 1002 | case USB_CDC_ACM_TYPE: |
| 1003 | ac_management_function = buffer[3]; |
| 1004 | break; |
| 1005 | case USB_CDC_CALL_MANAGEMENT_TYPE: |
| 1006 | call_management_function = buffer[3]; |
| 1007 | call_interface_num = buffer[4]; |
| 1008 | if ( (quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3) |
| 1009 | dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n"); |
| 1010 | break; |
| 1011 | default: |
| 1012 | /* there are LOTS more CDC descriptors that |
| 1013 | * could legitimately be found here. |
| 1014 | */ |
| 1015 | dev_dbg(&intf->dev, "Ignoring descriptor: " |
| 1016 | "type %02x, length %d\n", |
| 1017 | buffer[2], buffer[0]); |
| 1018 | break; |
| 1019 | } |
| 1020 | next_desc: |
| 1021 | buflen -= buffer[0]; |
| 1022 | buffer += buffer[0]; |
| 1023 | } |
| 1024 | |
| 1025 | if (!union_header) { |
| 1026 | if (call_interface_num > 0) { |
| 1027 | dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); |
| 1028 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); |
| 1029 | control_interface = intf; |
| 1030 | } else { |
| 1031 | if (intf->cur_altsetting->desc.bNumEndpoints != 3) { |
| 1032 | dev_dbg(&intf->dev,"No union descriptor, giving up\n"); |
| 1033 | return -ENODEV; |
| 1034 | } else { |
| 1035 | dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); |
| 1036 | combined_interfaces = 1; |
| 1037 | control_interface = data_interface = intf; |
| 1038 | goto look_for_collapsed_interface; |
| 1039 | } |
| 1040 | } |
| 1041 | } else { |
| 1042 | control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); |
| 1043 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); |
| 1044 | if (!control_interface || !data_interface) { |
| 1045 | dev_dbg(&intf->dev, "no interfaces\n"); |
| 1046 | return -ENODEV; |
| 1047 | } |
| 1048 | } |
| 1049 | |
| 1050 | if (data_interface_num != call_interface_num) |
| 1051 | dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); |
| 1052 | |
| 1053 | if (control_interface == data_interface) { |
| 1054 | /* some broken devices designed for windows work this way */ |
| 1055 | dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); |
| 1056 | combined_interfaces = 1; |
| 1057 | /* a popular other OS doesn't use it */ |
| 1058 | quirks |= NO_CAP_LINE; |
| 1059 | if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { |
| 1060 | dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); |
| 1061 | return -EINVAL; |
| 1062 | } |
| 1063 | look_for_collapsed_interface: |
| 1064 | for (i = 0; i < 3; i++) { |
| 1065 | struct usb_endpoint_descriptor *ep; |
| 1066 | ep = &data_interface->cur_altsetting->endpoint[i].desc; |
| 1067 | |
| 1068 | if (usb_endpoint_is_int_in(ep)) |
| 1069 | epctrl = ep; |
| 1070 | else if (usb_endpoint_is_bulk_out(ep)) |
| 1071 | epwrite = ep; |
| 1072 | else if (usb_endpoint_is_bulk_in(ep)) |
| 1073 | epread = ep; |
| 1074 | else |
| 1075 | return -EINVAL; |
| 1076 | } |
| 1077 | if (!epctrl || !epread || !epwrite) |
| 1078 | return -ENODEV; |
| 1079 | else |
| 1080 | goto made_compressed_probe; |
| 1081 | } |
| 1082 | |
| 1083 | skip_normal_probe: |
| 1084 | |
| 1085 | /*workaround for switched interfaces */ |
| 1086 | if (data_interface->cur_altsetting->desc.bInterfaceClass |
| 1087 | != CDC_DATA_INTERFACE_TYPE) { |
| 1088 | if (control_interface->cur_altsetting->desc.bInterfaceClass |
| 1089 | == CDC_DATA_INTERFACE_TYPE) { |
| 1090 | struct usb_interface *t; |
| 1091 | dev_dbg(&intf->dev, |
| 1092 | "Your device has switched interfaces.\n"); |
| 1093 | t = control_interface; |
| 1094 | control_interface = data_interface; |
| 1095 | data_interface = t; |
| 1096 | } else { |
| 1097 | return -EINVAL; |
| 1098 | } |
| 1099 | } |
| 1100 | |
| 1101 | /* Accept probe requests only for the control interface */ |
| 1102 | if (!combined_interfaces && intf != control_interface) |
| 1103 | return -ENODEV; |
| 1104 | |
| 1105 | if (!combined_interfaces && usb_interface_claimed(data_interface)) { |
| 1106 | /* valid in this context */ |
| 1107 | dev_dbg(&intf->dev, "The data interface isn't available\n"); |
| 1108 | return -EBUSY; |
| 1109 | } |
| 1110 | |
| 1111 | |
| 1112 | if (data_interface->cur_altsetting->desc.bNumEndpoints < 2) |
| 1113 | return -EINVAL; |
| 1114 | |
| 1115 | epctrl = &control_interface->cur_altsetting->endpoint[0].desc; |
| 1116 | epread = &data_interface->cur_altsetting->endpoint[0].desc; |
| 1117 | epwrite = &data_interface->cur_altsetting->endpoint[1].desc; |
| 1118 | |
| 1119 | |
| 1120 | /* workaround for switched endpoints */ |
| 1121 | if (!usb_endpoint_dir_in(epread)) { |
| 1122 | /* descriptors are swapped */ |
| 1123 | struct usb_endpoint_descriptor *t; |
| 1124 | dev_dbg(&intf->dev, |
| 1125 | "The data interface has switched endpoints\n"); |
| 1126 | t = epread; |
| 1127 | epread = epwrite; |
| 1128 | epwrite = t; |
| 1129 | } |
| 1130 | made_compressed_probe: |
| 1131 | dbg("interfaces are valid"); |
| 1132 | for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++); |
| 1133 | |
| 1134 | if (minor == ACM_TTY_MINORS) { |
| 1135 | dev_err(&intf->dev, "no more free acm devices\n"); |
| 1136 | return -ENODEV; |
| 1137 | } |
| 1138 | |
| 1139 | acm = kzalloc(sizeof(struct acm), GFP_KERNEL); |
| 1140 | if (acm == NULL) { |
| 1141 | dev_dbg(&intf->dev, "out of memory (acm kzalloc)\n"); |
| 1142 | goto alloc_fail; |
| 1143 | } |
| 1144 | |
| 1145 | ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize); |
| 1146 | readsize = le16_to_cpu(epread->wMaxPacketSize) * |
| 1147 | (quirks == SINGLE_RX_URB ? 1 : 2); |
| 1148 | acm->combined_interfaces = combined_interfaces; |
| 1149 | acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20; |
| 1150 | acm->control = control_interface; |
| 1151 | acm->data = data_interface; |
| 1152 | acm->minor = minor; |
| 1153 | acm->dev = usb_dev; |
| 1154 | acm->ctrl_caps = ac_management_function; |
| 1155 | if (quirks & NO_CAP_LINE) |
| 1156 | acm->ctrl_caps &= ~USB_CDC_CAP_LINE; |
| 1157 | acm->ctrlsize = ctrlsize; |
| 1158 | acm->readsize = readsize; |
| 1159 | acm->rx_buflimit = num_rx_buf; |
| 1160 | acm->urb_task.func = acm_rx_tasklet; |
| 1161 | acm->urb_task.data = (unsigned long) acm; |
| 1162 | INIT_WORK(&acm->work, acm_softint); |
| 1163 | init_waitqueue_head(&acm->drain_wait); |
| 1164 | spin_lock_init(&acm->throttle_lock); |
| 1165 | spin_lock_init(&acm->write_lock); |
| 1166 | spin_lock_init(&acm->read_lock); |
| 1167 | mutex_init(&acm->mutex); |
| 1168 | acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); |
| 1169 | acm->is_int_ep = usb_endpoint_xfer_int(epread); |
| 1170 | if (acm->is_int_ep) |
| 1171 | acm->bInterval = epread->bInterval; |
| 1172 | tty_port_init(&acm->port); |
| 1173 | acm->port.ops = &acm_port_ops; |
| 1174 | |
| 1175 | buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); |
| 1176 | if (!buf) { |
| 1177 | dev_dbg(&intf->dev, "out of memory (ctrl buffer alloc)\n"); |
| 1178 | goto alloc_fail2; |
| 1179 | } |
| 1180 | acm->ctrl_buffer = buf; |
| 1181 | |
| 1182 | if (acm_write_buffers_alloc(acm) < 0) { |
| 1183 | dev_dbg(&intf->dev, "out of memory (write buffer alloc)\n"); |
| 1184 | goto alloc_fail4; |
| 1185 | } |
| 1186 | |
| 1187 | acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); |
| 1188 | if (!acm->ctrlurb) { |
| 1189 | dev_dbg(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); |
| 1190 | goto alloc_fail5; |
| 1191 | } |
| 1192 | for (i = 0; i < num_rx_buf; i++) { |
| 1193 | struct acm_ru *rcv = &(acm->ru[i]); |
| 1194 | |
| 1195 | rcv->urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1196 | if (rcv->urb == NULL) { |
| 1197 | dev_dbg(&intf->dev, |
| 1198 | "out of memory (read urbs usb_alloc_urb)\n"); |
| 1199 | goto alloc_fail6; |
| 1200 | } |
| 1201 | |
| 1202 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 1203 | rcv->instance = acm; |
| 1204 | } |
| 1205 | for (i = 0; i < num_rx_buf; i++) { |
| 1206 | struct acm_rb *rb = &(acm->rb[i]); |
| 1207 | |
| 1208 | rb->base = usb_alloc_coherent(acm->dev, readsize, |
| 1209 | GFP_KERNEL, &rb->dma); |
| 1210 | if (!rb->base) { |
| 1211 | dev_dbg(&intf->dev, |
| 1212 | "out of memory (read bufs usb_alloc_coherent)\n"); |
| 1213 | goto alloc_fail7; |
| 1214 | } |
| 1215 | } |
| 1216 | for (i = 0; i < ACM_NW; i++) { |
| 1217 | struct acm_wb *snd = &(acm->wb[i]); |
| 1218 | |
| 1219 | snd->urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1220 | if (snd->urb == NULL) { |
| 1221 | dev_dbg(&intf->dev, |
| 1222 | "out of memory (write urbs usb_alloc_urb)"); |
| 1223 | goto alloc_fail8; |
| 1224 | } |
| 1225 | |
| 1226 | if (usb_endpoint_xfer_int(epwrite)) |
| 1227 | usb_fill_int_urb(snd->urb, usb_dev, |
| 1228 | usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), |
| 1229 | NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); |
| 1230 | else |
| 1231 | usb_fill_bulk_urb(snd->urb, usb_dev, |
| 1232 | usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), |
| 1233 | NULL, acm->writesize, acm_write_bulk, snd); |
| 1234 | snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 1235 | snd->instance = acm; |
| 1236 | } |
| 1237 | |
| 1238 | usb_set_intfdata(intf, acm); |
| 1239 | |
| 1240 | i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); |
| 1241 | if (i < 0) |
| 1242 | goto alloc_fail8; |
| 1243 | |
| 1244 | if (cfd) { /* export the country data */ |
| 1245 | acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); |
| 1246 | if (!acm->country_codes) |
| 1247 | goto skip_countries; |
| 1248 | acm->country_code_size = cfd->bLength - 4; |
| 1249 | memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, |
| 1250 | cfd->bLength - 4); |
| 1251 | acm->country_rel_date = cfd->iCountryCodeRelDate; |
| 1252 | |
| 1253 | i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); |
| 1254 | if (i < 0) { |
| 1255 | kfree(acm->country_codes); |
| 1256 | goto skip_countries; |
| 1257 | } |
| 1258 | |
| 1259 | i = device_create_file(&intf->dev, |
| 1260 | &dev_attr_iCountryCodeRelDate); |
| 1261 | if (i < 0) { |
| 1262 | device_remove_file(&intf->dev, &dev_attr_wCountryCodes); |
| 1263 | kfree(acm->country_codes); |
| 1264 | goto skip_countries; |
| 1265 | } |
| 1266 | } |
| 1267 | |
| 1268 | skip_countries: |
| 1269 | usb_fill_int_urb(acm->ctrlurb, usb_dev, |
| 1270 | usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), |
| 1271 | acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, |
| 1272 | /* works around buggy devices */ |
| 1273 | epctrl->bInterval ? epctrl->bInterval : 0xff); |
| 1274 | acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 1275 | acm->ctrlurb->transfer_dma = acm->ctrl_dma; |
| 1276 | |
| 1277 | dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); |
| 1278 | |
| 1279 | acm_set_control(acm, acm->ctrlout); |
| 1280 | |
| 1281 | acm->line.dwDTERate = cpu_to_le32(9600); |
| 1282 | acm->line.bDataBits = 8; |
| 1283 | acm_set_line(acm, &acm->line); |
| 1284 | |
| 1285 | usb_driver_claim_interface(&acm_driver, data_interface, acm); |
| 1286 | usb_set_intfdata(data_interface, acm); |
| 1287 | |
| 1288 | usb_get_intf(control_interface); |
| 1289 | tty_register_device(acm_tty_driver, minor, &control_interface->dev); |
| 1290 | |
| 1291 | acm_table[minor] = acm; |
| 1292 | |
| 1293 | return 0; |
| 1294 | alloc_fail8: |
| 1295 | for (i = 0; i < ACM_NW; i++) |
| 1296 | usb_free_urb(acm->wb[i].urb); |
| 1297 | alloc_fail7: |
| 1298 | acm_read_buffers_free(acm); |
| 1299 | alloc_fail6: |
| 1300 | for (i = 0; i < num_rx_buf; i++) |
| 1301 | usb_free_urb(acm->ru[i].urb); |
| 1302 | usb_free_urb(acm->ctrlurb); |
| 1303 | alloc_fail5: |
| 1304 | acm_write_buffers_free(acm); |
| 1305 | alloc_fail4: |
| 1306 | usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
| 1307 | alloc_fail2: |
| 1308 | kfree(acm); |
| 1309 | alloc_fail: |
| 1310 | return -ENOMEM; |
| 1311 | } |
| 1312 | |
| 1313 | static void stop_data_traffic(struct acm *acm) |
| 1314 | { |
| 1315 | int i; |
| 1316 | dbg("Entering stop_data_traffic"); |
| 1317 | |
| 1318 | tasklet_disable(&acm->urb_task); |
| 1319 | |
| 1320 | usb_kill_urb(acm->ctrlurb); |
| 1321 | for (i = 0; i < ACM_NW; i++) |
| 1322 | usb_kill_urb(acm->wb[i].urb); |
| 1323 | for (i = 0; i < acm->rx_buflimit; i++) |
| 1324 | usb_kill_urb(acm->ru[i].urb); |
| 1325 | |
| 1326 | tasklet_enable(&acm->urb_task); |
| 1327 | |
| 1328 | cancel_work_sync(&acm->work); |
| 1329 | } |
| 1330 | |
| 1331 | static void acm_disconnect(struct usb_interface *intf) |
| 1332 | { |
| 1333 | struct acm *acm = usb_get_intfdata(intf); |
| 1334 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
| 1335 | struct tty_struct *tty; |
| 1336 | |
| 1337 | /* sibling interface is already cleaning up */ |
| 1338 | if (!acm) |
| 1339 | return; |
| 1340 | |
| 1341 | mutex_lock(&open_mutex); |
| 1342 | if (acm->country_codes) { |
| 1343 | device_remove_file(&acm->control->dev, |
| 1344 | &dev_attr_wCountryCodes); |
| 1345 | device_remove_file(&acm->control->dev, |
| 1346 | &dev_attr_iCountryCodeRelDate); |
| 1347 | } |
| 1348 | device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); |
| 1349 | acm->dev = NULL; |
| 1350 | usb_set_intfdata(acm->control, NULL); |
| 1351 | usb_set_intfdata(acm->data, NULL); |
| 1352 | |
| 1353 | stop_data_traffic(acm); |
| 1354 | |
| 1355 | acm_write_buffers_free(acm); |
| 1356 | usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, |
| 1357 | acm->ctrl_dma); |
| 1358 | acm_read_buffers_free(acm); |
| 1359 | |
| 1360 | if (!acm->combined_interfaces) |
| 1361 | usb_driver_release_interface(&acm_driver, intf == acm->control ? |
| 1362 | acm->data : acm->control); |
| 1363 | |
| 1364 | if (acm->port.count == 0) { |
| 1365 | acm_tty_unregister(acm); |
| 1366 | mutex_unlock(&open_mutex); |
| 1367 | return; |
| 1368 | } |
| 1369 | |
| 1370 | mutex_unlock(&open_mutex); |
| 1371 | tty = tty_port_tty_get(&acm->port); |
| 1372 | if (tty) { |
| 1373 | tty_hangup(tty); |
| 1374 | tty_kref_put(tty); |
| 1375 | } |
| 1376 | } |
| 1377 | |
| 1378 | #ifdef CONFIG_PM |
| 1379 | static int acm_suspend(struct usb_interface *intf, pm_message_t message) |
| 1380 | { |
| 1381 | struct acm *acm = usb_get_intfdata(intf); |
| 1382 | int cnt; |
| 1383 | |
| 1384 | if (message.event & PM_EVENT_AUTO) { |
| 1385 | int b; |
| 1386 | |
| 1387 | spin_lock_irq(&acm->read_lock); |
| 1388 | spin_lock(&acm->write_lock); |
| 1389 | b = acm->processing + acm->transmitting; |
| 1390 | spin_unlock(&acm->write_lock); |
| 1391 | spin_unlock_irq(&acm->read_lock); |
| 1392 | if (b) |
| 1393 | return -EBUSY; |
| 1394 | } |
| 1395 | |
| 1396 | spin_lock_irq(&acm->read_lock); |
| 1397 | spin_lock(&acm->write_lock); |
| 1398 | cnt = acm->susp_count++; |
| 1399 | spin_unlock(&acm->write_lock); |
| 1400 | spin_unlock_irq(&acm->read_lock); |
| 1401 | |
| 1402 | if (cnt) |
| 1403 | return 0; |
| 1404 | /* |
| 1405 | we treat opened interfaces differently, |
| 1406 | we must guard against open |
| 1407 | */ |
| 1408 | mutex_lock(&acm->mutex); |
| 1409 | |
| 1410 | if (acm->port.count) |
| 1411 | stop_data_traffic(acm); |
| 1412 | |
| 1413 | mutex_unlock(&acm->mutex); |
| 1414 | return 0; |
| 1415 | } |
| 1416 | |
| 1417 | static int acm_resume(struct usb_interface *intf) |
| 1418 | { |
| 1419 | struct acm *acm = usb_get_intfdata(intf); |
| 1420 | struct acm_wb *wb; |
| 1421 | int rv = 0; |
| 1422 | int cnt; |
| 1423 | |
| 1424 | spin_lock_irq(&acm->read_lock); |
| 1425 | acm->susp_count -= 1; |
| 1426 | cnt = acm->susp_count; |
| 1427 | spin_unlock_irq(&acm->read_lock); |
| 1428 | |
| 1429 | if (cnt) |
| 1430 | return 0; |
| 1431 | |
| 1432 | mutex_lock(&acm->mutex); |
| 1433 | if (acm->port.count) { |
| 1434 | rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO); |
| 1435 | |
| 1436 | spin_lock_irq(&acm->write_lock); |
| 1437 | if (acm->delayed_wb) { |
| 1438 | wb = acm->delayed_wb; |
| 1439 | acm->delayed_wb = NULL; |
| 1440 | spin_unlock_irq(&acm->write_lock); |
| 1441 | acm_start_wb(acm, wb); |
| 1442 | } else { |
| 1443 | spin_unlock_irq(&acm->write_lock); |
| 1444 | } |
| 1445 | |
| 1446 | /* |
| 1447 | * delayed error checking because we must |
| 1448 | * do the write path at all cost |
| 1449 | */ |
| 1450 | if (rv < 0) |
| 1451 | goto err_out; |
| 1452 | |
| 1453 | tasklet_schedule(&acm->urb_task); |
| 1454 | } |
| 1455 | |
| 1456 | err_out: |
| 1457 | mutex_unlock(&acm->mutex); |
| 1458 | return rv; |
| 1459 | } |
| 1460 | |
| 1461 | static int acm_reset_resume(struct usb_interface *intf) |
| 1462 | { |
| 1463 | struct acm *acm = usb_get_intfdata(intf); |
| 1464 | struct tty_struct *tty; |
| 1465 | |
| 1466 | mutex_lock(&acm->mutex); |
| 1467 | if (acm->port.count) { |
| 1468 | tty = tty_port_tty_get(&acm->port); |
| 1469 | if (tty) { |
| 1470 | tty_hangup(tty); |
| 1471 | tty_kref_put(tty); |
| 1472 | } |
| 1473 | } |
| 1474 | mutex_unlock(&acm->mutex); |
| 1475 | return acm_resume(intf); |
| 1476 | } |
| 1477 | |
| 1478 | #endif /* CONFIG_PM */ |
| 1479 | |
| 1480 | #define NOKIA_PCSUITE_ACM_INFO(x) \ |
| 1481 | USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ |
| 1482 | USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ |
| 1483 | USB_CDC_ACM_PROTO_VENDOR) |
| 1484 | |
| 1485 | #define SAMSUNG_PCSUITE_ACM_INFO(x) \ |
| 1486 | USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ |
| 1487 | USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ |
| 1488 | USB_CDC_ACM_PROTO_VENDOR) |
| 1489 | |
| 1490 | /* |
| 1491 | * USB driver structure. |
| 1492 | */ |
| 1493 | |
| 1494 | static const struct usb_device_id acm_ids[] = { |
| 1495 | /* quirky and broken devices */ |
| 1496 | { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ |
| 1497 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1498 | }, |
| 1499 | { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ |
| 1500 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1501 | }, |
| 1502 | { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ |
| 1503 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1504 | }, |
| 1505 | { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ |
| 1506 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1507 | }, |
| 1508 | { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ |
| 1509 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1510 | }, |
| 1511 | { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ |
| 1512 | .driver_info = SINGLE_RX_URB, |
| 1513 | }, |
| 1514 | { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ |
| 1515 | .driver_info = SINGLE_RX_URB, /* firmware bug */ |
| 1516 | }, |
| 1517 | { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ |
| 1518 | .driver_info = SINGLE_RX_URB, /* firmware bug */ |
| 1519 | }, |
| 1520 | { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ |
| 1521 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1522 | }, |
| 1523 | { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ |
| 1524 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1525 | }, |
| 1526 | { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ |
| 1527 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1528 | }, |
| 1529 | { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ |
| 1530 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1531 | }, |
| 1532 | { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ |
| 1533 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1534 | }, |
| 1535 | { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ |
| 1536 | }, |
| 1537 | { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ |
| 1538 | .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on |
| 1539 | data interface instead of |
| 1540 | communications interface. |
| 1541 | Maybe we should define a new |
| 1542 | quirk for this. */ |
| 1543 | }, |
| 1544 | { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ |
| 1545 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ |
| 1546 | }, |
| 1547 | { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ |
| 1548 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ |
| 1549 | }, |
| 1550 | |
| 1551 | /* Nokia S60 phones expose two ACM channels. The first is |
| 1552 | * a modem and is picked up by the standard AT-command |
| 1553 | * information below. The second is 'vendor-specific' but |
| 1554 | * is treated as a serial device at the S60 end, so we want |
| 1555 | * to expose it on Linux too. */ |
| 1556 | { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ |
| 1557 | { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ |
| 1558 | { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ |
| 1559 | { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ |
| 1560 | { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ |
| 1561 | { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ |
| 1562 | { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ |
| 1563 | { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ |
| 1564 | { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ |
| 1565 | { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ |
| 1566 | { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ |
| 1567 | { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ |
| 1568 | { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ |
| 1569 | { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ |
| 1570 | { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ |
| 1571 | { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ |
| 1572 | { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ |
| 1573 | { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ |
| 1574 | { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ |
| 1575 | { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ |
| 1576 | { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ |
| 1577 | { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ |
| 1578 | { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ |
| 1579 | { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ |
| 1580 | { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ |
| 1581 | { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ |
| 1582 | { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ |
| 1583 | { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ |
| 1584 | { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ |
| 1585 | { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ |
| 1586 | { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ |
| 1587 | { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ |
| 1588 | { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ |
| 1589 | { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ |
| 1590 | { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ |
| 1591 | { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ |
| 1592 | { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ |
| 1593 | { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ |
| 1594 | { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ |
| 1595 | { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ |
| 1596 | { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ |
| 1597 | { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ |
| 1598 | { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ |
| 1599 | { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ |
| 1600 | { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ |
| 1601 | { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ |
| 1602 | { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ |
| 1603 | { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ |
| 1604 | { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ |
| 1605 | { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ |
| 1606 | { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ |
| 1607 | { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ |
| 1608 | { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ |
| 1609 | { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ |
| 1610 | { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ |
| 1611 | |
| 1612 | /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ |
| 1613 | |
| 1614 | /* Support Lego NXT using pbLua firmware */ |
| 1615 | { USB_DEVICE(0x0694, 0xff00), |
| 1616 | .driver_info = NOT_A_MODEM, |
| 1617 | }, |
| 1618 | |
| 1619 | /* control interfaces without any protocol set */ |
| 1620 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1621 | USB_CDC_PROTO_NONE) }, |
| 1622 | |
| 1623 | /* control interfaces with various AT-command sets */ |
| 1624 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1625 | USB_CDC_ACM_PROTO_AT_V25TER) }, |
| 1626 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1627 | USB_CDC_ACM_PROTO_AT_PCCA101) }, |
| 1628 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1629 | USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, |
| 1630 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1631 | USB_CDC_ACM_PROTO_AT_GSM) }, |
| 1632 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1633 | USB_CDC_ACM_PROTO_AT_3G) }, |
| 1634 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1635 | USB_CDC_ACM_PROTO_AT_CDMA) }, |
| 1636 | |
| 1637 | { } |
| 1638 | }; |
| 1639 | |
| 1640 | MODULE_DEVICE_TABLE(usb, acm_ids); |
| 1641 | |
| 1642 | static struct usb_driver acm_driver = { |
| 1643 | .name = "cdc_acm", |
| 1644 | .probe = acm_probe, |
| 1645 | .disconnect = acm_disconnect, |
| 1646 | #ifdef CONFIG_PM |
| 1647 | .suspend = acm_suspend, |
| 1648 | .resume = acm_resume, |
| 1649 | .reset_resume = acm_reset_resume, |
| 1650 | #endif |
| 1651 | .id_table = acm_ids, |
| 1652 | #ifdef CONFIG_PM |
| 1653 | .supports_autosuspend = 1, |
| 1654 | #endif |
| 1655 | }; |
| 1656 | |
| 1657 | /* |
| 1658 | * TTY driver structures. |
| 1659 | */ |
| 1660 | |
| 1661 | static const struct tty_operations acm_ops = { |
| 1662 | .open = acm_tty_open, |
| 1663 | .close = acm_tty_close, |
| 1664 | .hangup = acm_tty_hangup, |
| 1665 | .write = acm_tty_write, |
| 1666 | .write_room = acm_tty_write_room, |
| 1667 | .ioctl = acm_tty_ioctl, |
| 1668 | .throttle = acm_tty_throttle, |
| 1669 | .unthrottle = acm_tty_unthrottle, |
| 1670 | .chars_in_buffer = acm_tty_chars_in_buffer, |
| 1671 | .break_ctl = acm_tty_break_ctl, |
| 1672 | .set_termios = acm_tty_set_termios, |
| 1673 | .tiocmget = acm_tty_tiocmget, |
| 1674 | .tiocmset = acm_tty_tiocmset, |
| 1675 | }; |
| 1676 | |
| 1677 | /* |
| 1678 | * Init / exit. |
| 1679 | */ |
| 1680 | |
| 1681 | static int __init acm_init(void) |
| 1682 | { |
| 1683 | int retval; |
| 1684 | acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); |
| 1685 | if (!acm_tty_driver) |
| 1686 | return -ENOMEM; |
| 1687 | acm_tty_driver->owner = THIS_MODULE, |
| 1688 | acm_tty_driver->driver_name = "acm", |
| 1689 | acm_tty_driver->name = "ttyACM", |
| 1690 | acm_tty_driver->major = ACM_TTY_MAJOR, |
| 1691 | acm_tty_driver->minor_start = 0, |
| 1692 | acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, |
| 1693 | acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, |
| 1694 | acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
| 1695 | acm_tty_driver->init_termios = tty_std_termios; |
| 1696 | acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | |
| 1697 | HUPCL | CLOCAL; |
| 1698 | tty_set_operations(acm_tty_driver, &acm_ops); |
| 1699 | |
| 1700 | retval = tty_register_driver(acm_tty_driver); |
| 1701 | if (retval) { |
| 1702 | put_tty_driver(acm_tty_driver); |
| 1703 | return retval; |
| 1704 | } |
| 1705 | |
| 1706 | retval = usb_register(&acm_driver); |
| 1707 | if (retval) { |
| 1708 | tty_unregister_driver(acm_tty_driver); |
| 1709 | put_tty_driver(acm_tty_driver); |
| 1710 | return retval; |
| 1711 | } |
| 1712 | |
| 1713 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
| 1714 | DRIVER_DESC "\n"); |
| 1715 | |
| 1716 | return 0; |
| 1717 | } |
| 1718 | |
| 1719 | static void __exit acm_exit(void) |
| 1720 | { |
| 1721 | usb_deregister(&acm_driver); |
| 1722 | tty_unregister_driver(acm_tty_driver); |
| 1723 | put_tty_driver(acm_tty_driver); |
| 1724 | } |
| 1725 | |
| 1726 | module_init(acm_init); |
| 1727 | module_exit(acm_exit); |
| 1728 | |
| 1729 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1730 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 1731 | MODULE_LICENSE("GPL"); |
| 1732 | MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); |