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 * Copyright (c) 2011 Johan Hovold	<jhovold@gmail.com>
  11 *
  12 * USB Abstract Control Model driver for USB modems and ISDN adapters
  13 *
  14 * Sponsored by SuSE
  15 *
  16 * This program is free software; you can redistribute it and/or modify
  17 * it under the terms of the GNU General Public License as published by
  18 * the Free Software Foundation; either version 2 of the License, or
  19 * (at your option) any later version.
  20 *
  21 * This program is distributed in the hope that it will be useful,
  22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 * GNU General Public License for more details.
  25 *
  26 * You should have received a copy of the GNU General Public License
  27 * along with this program; if not, write to the Free Software
  28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  29 */
  30
  31#undef DEBUG
  32#undef VERBOSE_DEBUG
  33
  34#include <linux/kernel.h>
 
  35#include <linux/errno.h>
  36#include <linux/init.h>
  37#include <linux/slab.h>
 
  38#include <linux/tty.h>
  39#include <linux/serial.h>
  40#include <linux/tty_driver.h>
  41#include <linux/tty_flip.h>
  42#include <linux/module.h>
  43#include <linux/mutex.h>
  44#include <linux/uaccess.h>
  45#include <linux/usb.h>
  46#include <linux/usb/cdc.h>
  47#include <asm/byteorder.h>
  48#include <asm/unaligned.h>
 
  49#include <linux/list.h>
  50
  51#include "cdc-acm.h"
  52
  53
  54#define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
  55#define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
  56
  57static struct usb_driver acm_driver;
  58static struct tty_driver *acm_tty_driver;
  59static struct acm *acm_table[ACM_TTY_MINORS];
  60
  61static DEFINE_MUTEX(acm_table_lock);
 
 
 
 
  62
  63/*
  64 * acm_table accessors
  65 */
  66
  67/*
  68 * Look up an ACM structure by index. If found and not disconnected, increment
  69 * its refcount and return it with its mutex held.
  70 */
  71static struct acm *acm_get_by_index(unsigned index)
  72{
  73	struct acm *acm;
  74
  75	mutex_lock(&acm_table_lock);
  76	acm = acm_table[index];
  77	if (acm) {
  78		mutex_lock(&acm->mutex);
  79		if (acm->disconnected) {
  80			mutex_unlock(&acm->mutex);
  81			acm = NULL;
  82		} else {
  83			tty_port_get(&acm->port);
  84			mutex_unlock(&acm->mutex);
  85		}
  86	}
  87	mutex_unlock(&acm_table_lock);
  88	return acm;
  89}
  90
  91/*
  92 * Try to find an available minor number and if found, associate it with 'acm'.
  93 */
  94static int acm_alloc_minor(struct acm *acm)
  95{
  96	int minor;
  97
  98	mutex_lock(&acm_table_lock);
  99	for (minor = 0; minor < ACM_TTY_MINORS; minor++) {
 100		if (!acm_table[minor]) {
 101			acm_table[minor] = acm;
 102			break;
 103		}
 104	}
 105	mutex_unlock(&acm_table_lock);
 106
 107	return minor;
 108}
 109
 110/* Release the minor number associated with 'acm'.  */
 111static void acm_release_minor(struct acm *acm)
 112{
 113	mutex_lock(&acm_table_lock);
 114	acm_table[acm->minor] = NULL;
 115	mutex_unlock(&acm_table_lock);
 116}
 117
 118/*
 119 * Functions for ACM control messages.
 120 */
 121
 122static int acm_ctrl_msg(struct acm *acm, int request, int value,
 123							void *buf, int len)
 124{
 125	int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
 
 
 
 
 
 
 126		request, USB_RT_ACM, value,
 127		acm->control->altsetting[0].desc.bInterfaceNumber,
 128		buf, len, 5000);
 
 129	dev_dbg(&acm->control->dev,
 130			"%s - rq 0x%02x, val %#x, len %#x, result %d\n",
 131			__func__, request, value, len, retval);
 
 
 
 132	return retval < 0 ? retval : 0;
 133}
 134
 135/* devices aren't required to support these requests.
 136 * the cdc acm descriptor tells whether they do...
 137 */
 138#define acm_set_control(acm, control) \
 139	acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
 
 
 
 
 
 
 
 140#define acm_set_line(acm, line) \
 141	acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
 142#define acm_send_break(acm, ms) \
 143	acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
 144
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 145/*
 146 * Write buffer management.
 147 * All of these assume proper locks taken by the caller.
 148 */
 149
 150static int acm_wb_alloc(struct acm *acm)
 151{
 152	int i, wbn;
 153	struct acm_wb *wb;
 154
 155	wbn = 0;
 156	i = 0;
 157	for (;;) {
 158		wb = &acm->wb[wbn];
 159		if (!wb->use) {
 160			wb->use = 1;
 
 161			return wbn;
 162		}
 163		wbn = (wbn + 1) % ACM_NW;
 164		if (++i >= ACM_NW)
 165			return -1;
 166	}
 167}
 168
 169static int acm_wb_is_avail(struct acm *acm)
 170{
 171	int i, n;
 172	unsigned long flags;
 173
 174	n = ACM_NW;
 175	spin_lock_irqsave(&acm->write_lock, flags);
 176	for (i = 0; i < ACM_NW; i++)
 177		n -= acm->wb[i].use;
 
 178	spin_unlock_irqrestore(&acm->write_lock, flags);
 179	return n;
 180}
 181
 182/*
 183 * Finish write. Caller must hold acm->write_lock
 184 */
 185static void acm_write_done(struct acm *acm, struct acm_wb *wb)
 186{
 187	wb->use = 0;
 188	acm->transmitting--;
 189	usb_autopm_put_interface_async(acm->control);
 190}
 191
 192/*
 193 * Poke write.
 194 *
 195 * the caller is responsible for locking
 196 */
 197
 198static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
 199{
 200	int rc;
 201
 202	acm->transmitting++;
 203
 204	wb->urb->transfer_buffer = wb->buf;
 205	wb->urb->transfer_dma = wb->dmah;
 206	wb->urb->transfer_buffer_length = wb->len;
 207	wb->urb->dev = acm->dev;
 208
 209	rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
 210	if (rc < 0) {
 211		dev_err(&acm->data->dev,
 212			"%s - usb_submit_urb(write bulk) failed: %d\n",
 213			__func__, rc);
 
 214		acm_write_done(acm, wb);
 215	}
 216	return rc;
 217}
 218
 219/*
 220 * attributes exported through sysfs
 221 */
 222static ssize_t show_caps
 223(struct device *dev, struct device_attribute *attr, char *buf)
 224{
 225	struct usb_interface *intf = to_usb_interface(dev);
 226	struct acm *acm = usb_get_intfdata(intf);
 227
 228	return sprintf(buf, "%d", acm->ctrl_caps);
 229}
 230static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
 231
 232static ssize_t show_country_codes
 233(struct device *dev, struct device_attribute *attr, char *buf)
 234{
 235	struct usb_interface *intf = to_usb_interface(dev);
 236	struct acm *acm = usb_get_intfdata(intf);
 237
 238	memcpy(buf, acm->country_codes, acm->country_code_size);
 239	return acm->country_code_size;
 240}
 241
 242static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
 243
 244static ssize_t show_country_rel_date
 245(struct device *dev, struct device_attribute *attr, char *buf)
 246{
 247	struct usb_interface *intf = to_usb_interface(dev);
 248	struct acm *acm = usb_get_intfdata(intf);
 249
 250	return sprintf(buf, "%d", acm->country_rel_date);
 251}
 252
 253static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
 254/*
 255 * Interrupt handlers for various ACM device responses
 256 */
 257
 258/* control interface reports status changes with "interrupt" transfers */
 259static void acm_ctrl_irq(struct urb *urb)
 260{
 261	struct acm *acm = urb->context;
 262	struct usb_cdc_notification *dr = urb->transfer_buffer;
 263	unsigned char *data;
 264	int newctrl;
 265	int difference;
 266	int retval;
 267	int status = urb->status;
 268
 269	switch (status) {
 270	case 0:
 271		/* success */
 272		break;
 273	case -ECONNRESET:
 274	case -ENOENT:
 275	case -ESHUTDOWN:
 276		/* this urb is terminated, clean up */
 277		dev_dbg(&acm->control->dev,
 278				"%s - urb shutting down with status: %d\n",
 279				__func__, status);
 280		return;
 281	default:
 282		dev_dbg(&acm->control->dev,
 283				"%s - nonzero urb status received: %d\n",
 284				__func__, status);
 285		goto exit;
 286	}
 287
 288	usb_mark_last_busy(acm->dev);
 289
 290	data = (unsigned char *)(dr + 1);
 291	switch (dr->bNotificationType) {
 292	case USB_CDC_NOTIFY_NETWORK_CONNECTION:
 293		dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
 294							__func__, dr->wValue);
 295		break;
 296
 297	case USB_CDC_NOTIFY_SERIAL_STATE:
 
 
 
 
 
 
 298		newctrl = get_unaligned_le16(data);
 
 
 299
 300		if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
 301			dev_dbg(&acm->control->dev, "%s - calling hangup\n",
 302					__func__);
 303			tty_port_tty_hangup(&acm->port, false);
 304		}
 305
 306		difference = acm->ctrlin ^ newctrl;
 307		spin_lock(&acm->read_lock);
 308		acm->ctrlin = newctrl;
 309		acm->oldcount = acm->iocount;
 310
 311		if (difference & ACM_CTRL_DSR)
 312			acm->iocount.dsr++;
 313		if (difference & ACM_CTRL_BRK)
 314			acm->iocount.brk++;
 315		if (difference & ACM_CTRL_RI)
 316			acm->iocount.rng++;
 317		if (difference & ACM_CTRL_DCD)
 318			acm->iocount.dcd++;
 319		if (difference & ACM_CTRL_FRAMING)
 
 
 
 
 
 
 320			acm->iocount.frame++;
 321		if (difference & ACM_CTRL_PARITY)
 322			acm->iocount.parity++;
 323		if (difference & ACM_CTRL_OVERRUN)
 324			acm->iocount.overrun++;
 325		spin_unlock(&acm->read_lock);
 
 
 
 326
 327		if (difference)
 328			wake_up_all(&acm->wioctl);
 329
 330		break;
 331
 332	default:
 333		dev_dbg(&acm->control->dev,
 334			"%s - unknown notification %d received: index %d "
 335			"len %d data0 %d data1 %d\n",
 336			__func__,
 337			dr->bNotificationType, dr->wIndex,
 338			dr->wLength, data[0], data[1]);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 339		break;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 340	}
 
 
 
 
 
 
 
 341exit:
 342	retval = usb_submit_urb(urb, GFP_ATOMIC);
 343	if (retval)
 344		dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
 345							__func__, retval);
 
 
 
 346}
 347
 348static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
 349{
 350	int res;
 351
 352	if (!test_and_clear_bit(index, &acm->read_urbs_free))
 353		return 0;
 354
 355	dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
 356
 357	res = usb_submit_urb(acm->read_urbs[index], mem_flags);
 358	if (res) {
 359		if (res != -EPERM) {
 360			dev_err(&acm->data->dev,
 361					"%s - usb_submit_urb failed: %d\n",
 362					__func__, res);
 
 
 363		}
 364		set_bit(index, &acm->read_urbs_free);
 365		return res;
 
 
 366	}
 367
 368	return 0;
 369}
 370
 371static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
 372{
 373	int res;
 374	int i;
 375
 376	for (i = 0; i < acm->rx_buflimit; ++i) {
 377		res = acm_submit_read_urb(acm, i, mem_flags);
 378		if (res)
 379			return res;
 380	}
 381
 382	return 0;
 383}
 384
 385static void acm_process_read_urb(struct acm *acm, struct urb *urb)
 386{
 
 
 387	if (!urb->actual_length)
 388		return;
 389
 
 390	tty_insert_flip_string(&acm->port, urb->transfer_buffer,
 391			urb->actual_length);
 
 
 392	tty_flip_buffer_push(&acm->port);
 393}
 394
 395static void acm_read_bulk_callback(struct urb *urb)
 396{
 397	struct acm_rb *rb = urb->context;
 398	struct acm *acm = rb->instance;
 399	unsigned long flags;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 400
 401	dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
 402					rb->index, urb->actual_length);
 
 
 
 
 403	set_bit(rb->index, &acm->read_urbs_free);
 
 
 
 
 
 
 404
 405	if (!acm->dev) {
 406		dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
 
 
 
 407		return;
 408	}
 409	usb_mark_last_busy(acm->dev);
 410
 411	if (urb->status) {
 412		dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
 413							__func__, urb->status);
 414		return;
 415	}
 416	acm_process_read_urb(acm, urb);
 417
 418	/* throttle device if requested by tty */
 419	spin_lock_irqsave(&acm->read_lock, flags);
 420	acm->throttled = acm->throttle_req;
 421	if (!acm->throttled && !acm->susp_count) {
 422		spin_unlock_irqrestore(&acm->read_lock, flags);
 423		acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
 424	} else {
 425		spin_unlock_irqrestore(&acm->read_lock, flags);
 426	}
 427}
 428
 429/* data interface wrote those outgoing bytes */
 430static void acm_write_bulk(struct urb *urb)
 431{
 432	struct acm_wb *wb = urb->context;
 433	struct acm *acm = wb->instance;
 434	unsigned long flags;
 
 435
 436	if (urb->status	|| (urb->actual_length != urb->transfer_buffer_length))
 437		dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
 438			__func__,
 439			urb->actual_length,
 440			urb->transfer_buffer_length,
 441			urb->status);
 442
 443	spin_lock_irqsave(&acm->write_lock, flags);
 444	acm_write_done(acm, wb);
 445	spin_unlock_irqrestore(&acm->write_lock, flags);
 446	schedule_work(&acm->work);
 
 447}
 448
 449static void acm_softint(struct work_struct *work)
 450{
 451	struct acm *acm = container_of(work, struct acm, work);
 
 452
 453	dev_vdbg(&acm->data->dev, "%s\n", __func__);
 
 
 
 
 
 
 
 
 
 454
 455	tty_port_tty_wakeup(&acm->port);
 
 
 
 
 
 
 
 456}
 457
 458/*
 459 * TTY handlers
 460 */
 461
 462static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
 463{
 464	struct acm *acm;
 465	int retval;
 466
 467	dev_dbg(tty->dev, "%s\n", __func__);
 468
 469	acm = acm_get_by_index(tty->index);
 470	if (!acm)
 471		return -ENODEV;
 472
 473	retval = tty_standard_install(driver, tty);
 474	if (retval)
 475		goto error_init_termios;
 476
 
 
 
 
 
 
 
 477	tty->driver_data = acm;
 478
 479	return 0;
 480
 481error_init_termios:
 482	tty_port_put(&acm->port);
 483	return retval;
 484}
 485
 486static int acm_tty_open(struct tty_struct *tty, struct file *filp)
 487{
 488	struct acm *acm = tty->driver_data;
 489
 490	dev_dbg(tty->dev, "%s\n", __func__);
 491
 492	return tty_port_open(&acm->port, tty, filp);
 493}
 494
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 495static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
 496{
 497	struct acm *acm = container_of(port, struct acm, port);
 498	int retval = -ENODEV;
 499
 500	dev_dbg(&acm->control->dev, "%s\n", __func__);
 501
 502	mutex_lock(&acm->mutex);
 503	if (acm->disconnected)
 504		goto disconnected;
 505
 506	retval = usb_autopm_get_interface(acm->control);
 507	if (retval)
 508		goto error_get_interface;
 509
 510	/*
 511	 * FIXME: Why do we need this? Allocating 64K of physically contiguous
 512	 * memory is really nasty...
 513	 */
 514	set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
 515	acm->control->needs_remote_wakeup = 1;
 516
 517	acm->ctrlurb->dev = acm->dev;
 518	if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) {
 
 519		dev_err(&acm->control->dev,
 520			"%s - usb_submit_urb(ctrl irq) failed\n", __func__);
 521		usb_autopm_put_interface(acm->control);
 522		goto error_submit_urb;
 523	}
 524
 525	acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
 526	if (acm_set_control(acm, acm->ctrlout) < 0 &&
 527	    (acm->ctrl_caps & USB_CDC_CAP_LINE)) {
 528		usb_autopm_put_interface(acm->control);
 529		goto error_set_control;
 530	}
 531
 532	usb_autopm_put_interface(acm->control);
 533
 534	/*
 535	 * Unthrottle device in case the TTY was closed while throttled.
 536	 */
 537	spin_lock_irq(&acm->read_lock);
 538	acm->throttled = 0;
 539	acm->throttle_req = 0;
 540	spin_unlock_irq(&acm->read_lock);
 541
 542	if (acm_submit_read_urbs(acm, GFP_KERNEL))
 
 543		goto error_submit_read_urbs;
 544
 
 
 545	mutex_unlock(&acm->mutex);
 546
 547	return 0;
 548
 549error_submit_read_urbs:
 550	acm->ctrlout = 0;
 551	acm_set_control(acm, acm->ctrlout);
 552error_set_control:
 553	usb_kill_urb(acm->ctrlurb);
 554error_submit_urb:
 
 555error_get_interface:
 556disconnected:
 557	mutex_unlock(&acm->mutex);
 558	return retval;
 
 559}
 560
 561static void acm_port_destruct(struct tty_port *port)
 562{
 563	struct acm *acm = container_of(port, struct acm, port);
 564
 565	dev_dbg(&acm->control->dev, "%s\n", __func__);
 566
 567	acm_release_minor(acm);
 568	usb_put_intf(acm->control);
 569	kfree(acm->country_codes);
 570	kfree(acm);
 571}
 572
 573static void acm_port_shutdown(struct tty_port *port)
 574{
 575	struct acm *acm = container_of(port, struct acm, port);
 576	int i;
 
 577
 578	dev_dbg(&acm->control->dev, "%s\n", __func__);
 
 
 
 
 
 
 579
 580	mutex_lock(&acm->mutex);
 581	if (!acm->disconnected) {
 582		usb_autopm_get_interface(acm->control);
 583		acm_set_control(acm, acm->ctrlout = 0);
 584		usb_kill_urb(acm->ctrlurb);
 585		for (i = 0; i < ACM_NW; i++)
 586			usb_kill_urb(acm->wb[i].urb);
 587		for (i = 0; i < acm->rx_buflimit; i++)
 588			usb_kill_urb(acm->read_urbs[i]);
 589		acm->control->needs_remote_wakeup = 0;
 590		usb_autopm_put_interface(acm->control);
 591	}
 592	mutex_unlock(&acm->mutex);
 
 
 593}
 594
 595static void acm_tty_cleanup(struct tty_struct *tty)
 596{
 597	struct acm *acm = tty->driver_data;
 598	dev_dbg(&acm->control->dev, "%s\n", __func__);
 599	tty_port_put(&acm->port);
 600}
 601
 602static void acm_tty_hangup(struct tty_struct *tty)
 603{
 604	struct acm *acm = tty->driver_data;
 605	dev_dbg(&acm->control->dev, "%s\n", __func__);
 606	tty_port_hangup(&acm->port);
 607}
 608
 609static void acm_tty_close(struct tty_struct *tty, struct file *filp)
 610{
 611	struct acm *acm = tty->driver_data;
 612	dev_dbg(&acm->control->dev, "%s\n", __func__);
 613	tty_port_close(&acm->port, tty, filp);
 614}
 615
 616static int acm_tty_write(struct tty_struct *tty,
 617					const unsigned char *buf, int count)
 618{
 619	struct acm *acm = tty->driver_data;
 620	int stat;
 621	unsigned long flags;
 622	int wbn;
 623	struct acm_wb *wb;
 624
 625	if (!count)
 626		return 0;
 627
 628	dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
 629
 630	spin_lock_irqsave(&acm->write_lock, flags);
 631	wbn = acm_wb_alloc(acm);
 632	if (wbn < 0) {
 633		spin_unlock_irqrestore(&acm->write_lock, flags);
 634		return 0;
 635	}
 636	wb = &acm->wb[wbn];
 637
 638	if (!acm->dev) {
 639		wb->use = 0;
 640		spin_unlock_irqrestore(&acm->write_lock, flags);
 641		return -ENODEV;
 642	}
 643
 644	count = (count > acm->writesize) ? acm->writesize : count;
 645	dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
 646	memcpy(wb->buf, buf, count);
 647	wb->len = count;
 648
 649	usb_autopm_get_interface_async(acm->control);
 
 
 
 
 
 
 650	if (acm->susp_count) {
 651		if (!acm->delayed_wb)
 652			acm->delayed_wb = wb;
 653		else
 654			usb_autopm_put_interface_async(acm->control);
 655		spin_unlock_irqrestore(&acm->write_lock, flags);
 656		return count;	/* A white lie */
 657	}
 658	usb_mark_last_busy(acm->dev);
 659
 660	stat = acm_start_wb(acm, wb);
 661	spin_unlock_irqrestore(&acm->write_lock, flags);
 662
 663	if (stat < 0)
 664		return stat;
 665	return count;
 666}
 667
 668static int acm_tty_write_room(struct tty_struct *tty)
 669{
 670	struct acm *acm = tty->driver_data;
 671	/*
 672	 * Do not let the line discipline to know that we have a reserve,
 673	 * or it might get too enthusiastic.
 674	 */
 675	return acm_wb_is_avail(acm) ? acm->writesize : 0;
 676}
 677
 678static int acm_tty_chars_in_buffer(struct tty_struct *tty)
 679{
 680	struct acm *acm = tty->driver_data;
 681	/*
 682	 * if the device was unplugged then any remaining characters fell out
 683	 * of the connector ;)
 684	 */
 685	if (acm->disconnected)
 686		return 0;
 687	/*
 688	 * This is inaccurate (overcounts), but it works.
 689	 */
 690	return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
 691}
 692
 693static void acm_tty_throttle(struct tty_struct *tty)
 694{
 695	struct acm *acm = tty->driver_data;
 696
 697	spin_lock_irq(&acm->read_lock);
 698	acm->throttle_req = 1;
 699	spin_unlock_irq(&acm->read_lock);
 700}
 701
 702static void acm_tty_unthrottle(struct tty_struct *tty)
 703{
 704	struct acm *acm = tty->driver_data;
 705	unsigned int was_throttled;
 706
 707	spin_lock_irq(&acm->read_lock);
 708	was_throttled = acm->throttled;
 709	acm->throttled = 0;
 710	acm->throttle_req = 0;
 711	spin_unlock_irq(&acm->read_lock);
 712
 713	if (was_throttled)
 714		acm_submit_read_urbs(acm, GFP_KERNEL);
 
 
 715}
 716
 717static int acm_tty_break_ctl(struct tty_struct *tty, int state)
 718{
 719	struct acm *acm = tty->driver_data;
 720	int retval;
 721
 722	retval = acm_send_break(acm, state ? 0xffff : 0);
 723	if (retval < 0)
 724		dev_dbg(&acm->control->dev, "%s - send break failed\n",
 725								__func__);
 726	return retval;
 727}
 728
 729static int acm_tty_tiocmget(struct tty_struct *tty)
 730{
 731	struct acm *acm = tty->driver_data;
 732
 733	return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
 734	       (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
 735	       (acm->ctrlin  & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
 736	       (acm->ctrlin  & ACM_CTRL_RI  ? TIOCM_RI  : 0) |
 737	       (acm->ctrlin  & ACM_CTRL_DCD ? TIOCM_CD  : 0) |
 738	       TIOCM_CTS;
 739}
 740
 741static int acm_tty_tiocmset(struct tty_struct *tty,
 742			    unsigned int set, unsigned int clear)
 743{
 744	struct acm *acm = tty->driver_data;
 745	unsigned int newctrl;
 746
 747	newctrl = acm->ctrlout;
 748	set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
 749					(set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
 750	clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
 751					(clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
 752
 753	newctrl = (newctrl & ~clear) | set;
 754
 755	if (acm->ctrlout == newctrl)
 756		return 0;
 757	return acm_set_control(acm, acm->ctrlout = newctrl);
 758}
 759
 760static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
 761{
 762	struct serial_struct tmp;
 763
 764	if (!info)
 765		return -EINVAL;
 766
 767	memset(&tmp, 0, sizeof(tmp));
 768	tmp.flags = ASYNC_LOW_LATENCY;
 769	tmp.xmit_fifo_size = acm->writesize;
 770	tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
 771	tmp.close_delay	= acm->port.close_delay / 10;
 772	tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
 773				ASYNC_CLOSING_WAIT_NONE :
 774				acm->port.closing_wait / 10;
 775
 776	if (copy_to_user(info, &tmp, sizeof(tmp)))
 777		return -EFAULT;
 778	else
 779		return 0;
 780}
 781
 782static int set_serial_info(struct acm *acm,
 783				struct serial_struct __user *newinfo)
 784{
 785	struct serial_struct new_serial;
 786	unsigned int closing_wait, close_delay;
 787	int retval = 0;
 788
 789	if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
 790		return -EFAULT;
 791
 792	close_delay = new_serial.close_delay * 10;
 793	closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
 794			ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
 795
 796	mutex_lock(&acm->port.mutex);
 797
 798	if (!capable(CAP_SYS_ADMIN)) {
 799		if ((close_delay != acm->port.close_delay) ||
 800		    (closing_wait != acm->port.closing_wait))
 801			retval = -EPERM;
 802		else
 803			retval = -EOPNOTSUPP;
 804	} else {
 805		acm->port.close_delay  = close_delay;
 806		acm->port.closing_wait = closing_wait;
 807	}
 808
 809	mutex_unlock(&acm->port.mutex);
 810	return retval;
 811}
 812
 813static int wait_serial_change(struct acm *acm, unsigned long arg)
 814{
 815	int rv = 0;
 816	DECLARE_WAITQUEUE(wait, current);
 817	struct async_icount old, new;
 818
 819	if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
 820		return -EINVAL;
 821	do {
 822		spin_lock_irq(&acm->read_lock);
 823		old = acm->oldcount;
 824		new = acm->iocount;
 825		acm->oldcount = new;
 826		spin_unlock_irq(&acm->read_lock);
 827
 828		if ((arg & TIOCM_DSR) &&
 829			old.dsr != new.dsr)
 830			break;
 831		if ((arg & TIOCM_CD)  &&
 832			old.dcd != new.dcd)
 833			break;
 834		if ((arg & TIOCM_RI) &&
 835			old.rng != new.rng)
 836			break;
 837
 838		add_wait_queue(&acm->wioctl, &wait);
 839		set_current_state(TASK_INTERRUPTIBLE);
 840		schedule();
 841		remove_wait_queue(&acm->wioctl, &wait);
 842		if (acm->disconnected) {
 843			if (arg & TIOCM_CD)
 844				break;
 845			else
 846				rv = -ENODEV;
 847		} else {
 848			if (signal_pending(current))
 849				rv = -ERESTARTSYS;
 850		}
 851	} while (!rv);
 852
 853	
 854
 855	return rv;
 856}
 857
 858static int get_serial_usage(struct acm *acm,
 859			    struct serial_icounter_struct __user *count)
 860{
 861	struct serial_icounter_struct icount;
 862	int rv = 0;
 863
 864	memset(&icount, 0, sizeof(icount));
 865	icount.dsr = acm->iocount.dsr;
 866	icount.rng = acm->iocount.rng;
 867	icount.dcd = acm->iocount.dcd;
 868	icount.frame = acm->iocount.frame;
 869	icount.overrun = acm->iocount.overrun;
 870	icount.parity = acm->iocount.parity;
 871	icount.brk = acm->iocount.brk;
 872
 873	if (copy_to_user(count, &icount, sizeof(icount)) > 0)
 874		rv = -EFAULT;
 
 
 
 
 
 875
 876	return rv;
 877}
 878
 879static int acm_tty_ioctl(struct tty_struct *tty,
 880					unsigned int cmd, unsigned long arg)
 881{
 882	struct acm *acm = tty->driver_data;
 883	int rv = -ENOIOCTLCMD;
 884
 885	switch (cmd) {
 886	case TIOCGSERIAL: /* gets serial port data */
 887		rv = get_serial_info(acm, (struct serial_struct __user *) arg);
 888		break;
 889	case TIOCSSERIAL:
 890		rv = set_serial_info(acm, (struct serial_struct __user *) arg);
 891		break;
 892	case TIOCMIWAIT:
 893		rv = usb_autopm_get_interface(acm->control);
 894		if (rv < 0) {
 895			rv = -EIO;
 896			break;
 897		}
 898		rv = wait_serial_change(acm, arg);
 899		usb_autopm_put_interface(acm->control);
 900		break;
 901	case TIOCGICOUNT:
 902		rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
 903		break;
 904	}
 905
 906	return rv;
 907}
 908
 909static void acm_tty_set_termios(struct tty_struct *tty,
 910						struct ktermios *termios_old)
 911{
 912	struct acm *acm = tty->driver_data;
 913	struct ktermios *termios = &tty->termios;
 914	struct usb_cdc_line_coding newline;
 915	int newctrl = acm->ctrlout;
 916
 917	newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
 918	newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
 919	newline.bParityType = termios->c_cflag & PARENB ?
 920				(termios->c_cflag & PARODD ? 1 : 2) +
 921				(termios->c_cflag & CMSPAR ? 2 : 0) : 0;
 922	switch (termios->c_cflag & CSIZE) {
 923	case CS5:
 924		newline.bDataBits = 5;
 925		break;
 926	case CS6:
 927		newline.bDataBits = 6;
 928		break;
 929	case CS7:
 930		newline.bDataBits = 7;
 931		break;
 932	case CS8:
 933	default:
 934		newline.bDataBits = 8;
 935		break;
 936	}
 937	/* FIXME: Needs to clear unsupported bits in the termios */
 938	acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
 939
 940	if (!newline.dwDTERate) {
 941		newline.dwDTERate = acm->line.dwDTERate;
 942		newctrl &= ~ACM_CTRL_DTR;
 943	} else
 944		newctrl |=  ACM_CTRL_DTR;
 
 945
 946	if (newctrl != acm->ctrlout)
 947		acm_set_control(acm, acm->ctrlout = newctrl);
 948
 949	if (memcmp(&acm->line, &newline, sizeof newline)) {
 950		memcpy(&acm->line, &newline, sizeof newline);
 951		dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
 952			__func__,
 953			le32_to_cpu(newline.dwDTERate),
 954			newline.bCharFormat, newline.bParityType,
 955			newline.bDataBits);
 956		acm_set_line(acm, &acm->line);
 957	}
 958}
 959
 960static const struct tty_port_operations acm_port_ops = {
 
 961	.shutdown = acm_port_shutdown,
 962	.activate = acm_port_activate,
 963	.destruct = acm_port_destruct,
 964};
 965
 966/*
 967 * USB probe and disconnect routines.
 968 */
 969
 970/* Little helpers: write/read buffers free */
 971static void acm_write_buffers_free(struct acm *acm)
 972{
 973	int i;
 974	struct acm_wb *wb;
 975	struct usb_device *usb_dev = interface_to_usbdev(acm->control);
 976
 977	for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
 978		usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
 979}
 980
 981static void acm_read_buffers_free(struct acm *acm)
 982{
 983	struct usb_device *usb_dev = interface_to_usbdev(acm->control);
 984	int i;
 985
 986	for (i = 0; i < acm->rx_buflimit; i++)
 987		usb_free_coherent(usb_dev, acm->readsize,
 988			  acm->read_buffers[i].base, acm->read_buffers[i].dma);
 989}
 990
 991/* Little helper: write buffers allocate */
 992static int acm_write_buffers_alloc(struct acm *acm)
 993{
 994	int i;
 995	struct acm_wb *wb;
 996
 997	for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
 998		wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
 999		    &wb->dmah);
1000		if (!wb->buf) {
1001			while (i != 0) {
1002				--i;
1003				--wb;
1004				usb_free_coherent(acm->dev, acm->writesize,
1005				    wb->buf, wb->dmah);
1006			}
1007			return -ENOMEM;
1008		}
1009	}
1010	return 0;
1011}
1012
1013static int acm_probe(struct usb_interface *intf,
1014		     const struct usb_device_id *id)
1015{
1016	struct usb_cdc_union_desc *union_header = NULL;
1017	struct usb_cdc_country_functional_desc *cfd = NULL;
1018	unsigned char *buffer = intf->altsetting->extra;
1019	int buflen = intf->altsetting->extralen;
1020	struct usb_interface *control_interface;
1021	struct usb_interface *data_interface;
1022	struct usb_endpoint_descriptor *epctrl = NULL;
1023	struct usb_endpoint_descriptor *epread = NULL;
1024	struct usb_endpoint_descriptor *epwrite = NULL;
1025	struct usb_device *usb_dev = interface_to_usbdev(intf);
 
1026	struct acm *acm;
1027	int minor;
1028	int ctrlsize, readsize;
1029	u8 *buf;
1030	u8 ac_management_function = 0;
1031	u8 call_management_function = 0;
1032	int call_interface_num = -1;
1033	int data_interface_num = -1;
1034	unsigned long quirks;
1035	int num_rx_buf;
1036	int i;
1037	int combined_interfaces = 0;
1038	struct device *tty_dev;
1039	int rv = -ENOMEM;
 
1040
1041	/* normal quirks */
1042	quirks = (unsigned long)id->driver_info;
1043
1044	if (quirks == IGNORE_DEVICE)
1045		return -ENODEV;
1046
 
 
1047	num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1048
1049	/* handle quirks deadly to normal probing*/
1050	if (quirks == NO_UNION_NORMAL) {
1051		data_interface = usb_ifnum_to_if(usb_dev, 1);
1052		control_interface = usb_ifnum_to_if(usb_dev, 0);
 
 
 
1053		goto skip_normal_probe;
1054	}
1055
1056	/* normal probing*/
1057	if (!buffer) {
1058		dev_err(&intf->dev, "Weird descriptor references\n");
1059		return -EINVAL;
1060	}
1061
1062	if (!buflen) {
1063		if (intf->cur_altsetting->endpoint &&
1064				intf->cur_altsetting->endpoint->extralen &&
1065				intf->cur_altsetting->endpoint->extra) {
1066			dev_dbg(&intf->dev,
1067				"Seeking extra descriptors on endpoint\n");
1068			buflen = intf->cur_altsetting->endpoint->extralen;
1069			buffer = intf->cur_altsetting->endpoint->extra;
1070		} else {
1071			dev_err(&intf->dev,
1072				"Zero length descriptor references\n");
1073			return -EINVAL;
1074		}
1075	}
1076
1077	while (buflen > 0) {
1078		if (buffer[1] != USB_DT_CS_INTERFACE) {
1079			dev_err(&intf->dev, "skipping garbage\n");
1080			goto next_desc;
1081		}
1082
1083		switch (buffer[2]) {
1084		case USB_CDC_UNION_TYPE: /* we've found it */
1085			if (union_header) {
1086				dev_err(&intf->dev, "More than one "
1087					"union descriptor, skipping ...\n");
1088				goto next_desc;
1089			}
1090			union_header = (struct usb_cdc_union_desc *)buffer;
1091			break;
1092		case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1093			cfd = (struct usb_cdc_country_functional_desc *)buffer;
1094			break;
1095		case USB_CDC_HEADER_TYPE: /* maybe check version */
1096			break; /* for now we ignore it */
1097		case USB_CDC_ACM_TYPE:
1098			ac_management_function = buffer[3];
1099			break;
1100		case USB_CDC_CALL_MANAGEMENT_TYPE:
1101			call_management_function = buffer[3];
1102			call_interface_num = buffer[4];
1103			if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
1104				dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1105			break;
1106		default:
1107			/* there are LOTS more CDC descriptors that
1108			 * could legitimately be found here.
1109			 */
1110			dev_dbg(&intf->dev, "Ignoring descriptor: "
1111					"type %02x, length %d\n",
1112					buffer[2], buffer[0]);
1113			break;
1114		}
1115next_desc:
1116		buflen -= buffer[0];
1117		buffer += buffer[0];
1118	}
1119
1120	if (!union_header) {
1121		if (call_interface_num > 0) {
 
 
 
 
 
1122			dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1123			/* quirks for Droids MuIn LCD */
1124			if (quirks & NO_DATA_INTERFACE)
1125				data_interface = usb_ifnum_to_if(usb_dev, 0);
1126			else
1127				data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1128			control_interface = intf;
1129		} else {
1130			if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1131				dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1132				return -ENODEV;
1133			} else {
1134				dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1135				combined_interfaces = 1;
1136				control_interface = data_interface = intf;
1137				goto look_for_collapsed_interface;
1138			}
1139		}
1140	} else {
 
 
 
1141		control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1142		data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1143		if (!control_interface || !data_interface) {
1144			dev_dbg(&intf->dev, "no interfaces\n");
1145			return -ENODEV;
 
 
 
 
 
 
1146		}
1147	}
1148
1149	if (data_interface_num != call_interface_num)
 
 
 
 
 
1150		dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1151
1152	if (control_interface == data_interface) {
1153		/* some broken devices designed for windows work this way */
1154		dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1155		combined_interfaces = 1;
1156		/* a popular other OS doesn't use it */
1157		quirks |= NO_CAP_LINE;
1158		if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1159			dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1160			return -EINVAL;
1161		}
1162look_for_collapsed_interface:
1163		for (i = 0; i < 3; i++) {
1164			struct usb_endpoint_descriptor *ep;
1165			ep = &data_interface->cur_altsetting->endpoint[i].desc;
1166
1167			if (usb_endpoint_is_int_in(ep))
1168				epctrl = ep;
1169			else if (usb_endpoint_is_bulk_out(ep))
1170				epwrite = ep;
1171			else if (usb_endpoint_is_bulk_in(ep))
1172				epread = ep;
1173			else
1174				return -EINVAL;
1175		}
1176		if (!epctrl || !epread || !epwrite)
1177			return -ENODEV;
1178		else
1179			goto made_compressed_probe;
1180	}
1181
1182skip_normal_probe:
1183
1184	/*workaround for switched interfaces */
1185	if (data_interface->cur_altsetting->desc.bInterfaceClass
1186						!= CDC_DATA_INTERFACE_TYPE) {
1187		if (control_interface->cur_altsetting->desc.bInterfaceClass
1188						== CDC_DATA_INTERFACE_TYPE) {
1189			struct usb_interface *t;
1190			dev_dbg(&intf->dev,
1191				"Your device has switched interfaces.\n");
1192			t = control_interface;
1193			control_interface = data_interface;
1194			data_interface = t;
1195		} else {
1196			return -EINVAL;
1197		}
1198	}
1199
1200	/* Accept probe requests only for the control interface */
1201	if (!combined_interfaces && intf != control_interface)
1202		return -ENODEV;
1203
1204	if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1205		/* valid in this context */
1206		dev_dbg(&intf->dev, "The data interface isn't available\n");
1207		return -EBUSY;
1208	}
1209
1210
1211	if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1212	    control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1213		return -EINVAL;
1214
1215	epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1216	epread = &data_interface->cur_altsetting->endpoint[0].desc;
1217	epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1218
1219
1220	/* workaround for switched endpoints */
1221	if (!usb_endpoint_dir_in(epread)) {
1222		/* descriptors are swapped */
1223		struct usb_endpoint_descriptor *t;
1224		dev_dbg(&intf->dev,
1225			"The data interface has switched endpoints\n");
1226		t = epread;
1227		epread = epwrite;
1228		epwrite = t;
1229	}
1230made_compressed_probe:
1231	dev_dbg(&intf->dev, "interfaces are valid\n");
1232
1233	acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1234	if (acm == NULL) {
1235		dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1236		goto alloc_fail;
1237	}
1238
1239	minor = acm_alloc_minor(acm);
1240	if (minor == ACM_TTY_MINORS) {
1241		dev_err(&intf->dev, "no more free acm devices\n");
1242		kfree(acm);
1243		return -ENODEV;
1244	}
1245
1246	ctrlsize = usb_endpoint_maxp(epctrl);
1247	readsize = usb_endpoint_maxp(epread) *
1248				(quirks == SINGLE_RX_URB ? 1 : 2);
1249	acm->combined_interfaces = combined_interfaces;
1250	acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1251	acm->control = control_interface;
1252	acm->data = data_interface;
 
 
 
 
 
 
 
 
 
1253	acm->minor = minor;
1254	acm->dev = usb_dev;
1255	acm->ctrl_caps = ac_management_function;
 
1256	if (quirks & NO_CAP_LINE)
1257		acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1258	acm->ctrlsize = ctrlsize;
1259	acm->readsize = readsize;
1260	acm->rx_buflimit = num_rx_buf;
1261	INIT_WORK(&acm->work, acm_softint);
1262	init_waitqueue_head(&acm->wioctl);
1263	spin_lock_init(&acm->write_lock);
1264	spin_lock_init(&acm->read_lock);
1265	mutex_init(&acm->mutex);
1266	acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1267	acm->is_int_ep = usb_endpoint_xfer_int(epread);
1268	if (acm->is_int_ep)
1269		acm->bInterval = epread->bInterval;
1270	tty_port_init(&acm->port);
1271	acm->port.ops = &acm_port_ops;
 
 
 
 
 
 
 
 
1272
1273	buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1274	if (!buf) {
1275		dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1276		goto alloc_fail2;
1277	}
1278	acm->ctrl_buffer = buf;
1279
1280	if (acm_write_buffers_alloc(acm) < 0) {
1281		dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1282		goto alloc_fail4;
1283	}
1284
1285	acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1286	if (!acm->ctrlurb) {
1287		dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1288		goto alloc_fail5;
1289	}
1290	for (i = 0; i < num_rx_buf; i++) {
1291		struct acm_rb *rb = &(acm->read_buffers[i]);
1292		struct urb *urb;
1293
1294		rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1295								&rb->dma);
1296		if (!rb->base) {
1297			dev_err(&intf->dev, "out of memory "
1298					"(read bufs usb_alloc_coherent)\n");
1299			goto alloc_fail6;
1300		}
1301		rb->index = i;
1302		rb->instance = acm;
1303
1304		urb = usb_alloc_urb(0, GFP_KERNEL);
1305		if (!urb) {
1306			dev_err(&intf->dev,
1307				"out of memory (read urbs usb_alloc_urb)\n");
1308			goto alloc_fail6;
1309		}
1310		urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1311		urb->transfer_dma = rb->dma;
1312		if (acm->is_int_ep) {
1313			usb_fill_int_urb(urb, acm->dev,
1314					 acm->rx_endpoint,
1315					 rb->base,
1316					 acm->readsize,
1317					 acm_read_bulk_callback, rb,
1318					 acm->bInterval);
1319		} else {
1320			usb_fill_bulk_urb(urb, acm->dev,
1321					  acm->rx_endpoint,
1322					  rb->base,
1323					  acm->readsize,
1324					  acm_read_bulk_callback, rb);
1325		}
1326
1327		acm->read_urbs[i] = urb;
1328		__set_bit(i, &acm->read_urbs_free);
1329	}
1330	for (i = 0; i < ACM_NW; i++) {
1331		struct acm_wb *snd = &(acm->wb[i]);
1332
1333		snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1334		if (snd->urb == NULL) {
1335			dev_err(&intf->dev,
1336				"out of memory (write urbs usb_alloc_urb)\n");
1337			goto alloc_fail7;
1338		}
1339
1340		if (usb_endpoint_xfer_int(epwrite))
1341			usb_fill_int_urb(snd->urb, usb_dev,
1342				usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1343				NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1344		else
1345			usb_fill_bulk_urb(snd->urb, usb_dev,
1346				usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1347				NULL, acm->writesize, acm_write_bulk, snd);
1348		snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 
 
1349		snd->instance = acm;
1350	}
1351
1352	usb_set_intfdata(intf, acm);
1353
1354	i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1355	if (i < 0)
1356		goto alloc_fail7;
 
 
 
 
1357
1358	if (cfd) { /* export the country data */
1359		acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1360		if (!acm->country_codes)
1361			goto skip_countries;
1362		acm->country_code_size = cfd->bLength - 4;
1363		memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1364							cfd->bLength - 4);
1365		acm->country_rel_date = cfd->iCountryCodeRelDate;
1366
1367		i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1368		if (i < 0) {
1369			kfree(acm->country_codes);
1370			acm->country_codes = NULL;
1371			acm->country_code_size = 0;
1372			goto skip_countries;
1373		}
1374
1375		i = device_create_file(&intf->dev,
1376						&dev_attr_iCountryCodeRelDate);
1377		if (i < 0) {
1378			device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1379			kfree(acm->country_codes);
1380			acm->country_codes = NULL;
1381			acm->country_code_size = 0;
1382			goto skip_countries;
1383		}
1384	}
1385
1386skip_countries:
1387	usb_fill_int_urb(acm->ctrlurb, usb_dev,
1388			 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1389			 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1390			 /* works around buggy devices */
1391			 epctrl->bInterval ? epctrl->bInterval : 16);
1392	acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1393	acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1394
1395	dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1396
1397	acm_set_control(acm, acm->ctrlout);
1398
1399	acm->line.dwDTERate = cpu_to_le32(9600);
1400	acm->line.bDataBits = 8;
1401	acm_set_line(acm, &acm->line);
1402
1403	usb_driver_claim_interface(&acm_driver, data_interface, acm);
1404	usb_set_intfdata(data_interface, acm);
 
 
 
1405
1406	usb_get_intf(control_interface);
1407	tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1408			&control_interface->dev);
1409	if (IS_ERR(tty_dev)) {
1410		rv = PTR_ERR(tty_dev);
1411		goto alloc_fail8;
1412	}
1413
 
 
 
 
 
 
 
1414	return 0;
1415alloc_fail8:
 
 
 
 
 
 
 
1416	if (acm->country_codes) {
1417		device_remove_file(&acm->control->dev,
1418				&dev_attr_wCountryCodes);
1419		device_remove_file(&acm->control->dev,
1420				&dev_attr_iCountryCodeRelDate);
1421	}
1422	device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1423alloc_fail7:
1424	usb_set_intfdata(intf, NULL);
1425	for (i = 0; i < ACM_NW; i++)
1426		usb_free_urb(acm->wb[i].urb);
1427alloc_fail6:
1428	for (i = 0; i < num_rx_buf; i++)
1429		usb_free_urb(acm->read_urbs[i]);
1430	acm_read_buffers_free(acm);
1431	usb_free_urb(acm->ctrlurb);
1432alloc_fail5:
1433	acm_write_buffers_free(acm);
1434alloc_fail4:
1435	usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1436alloc_fail2:
1437	acm_release_minor(acm);
1438	kfree(acm);
1439alloc_fail:
1440	return rv;
1441}
1442
1443static void stop_data_traffic(struct acm *acm)
1444{
1445	int i;
1446
1447	dev_dbg(&acm->control->dev, "%s\n", __func__);
1448
1449	usb_kill_urb(acm->ctrlurb);
1450	for (i = 0; i < ACM_NW; i++)
1451		usb_kill_urb(acm->wb[i].urb);
1452	for (i = 0; i < acm->rx_buflimit; i++)
1453		usb_kill_urb(acm->read_urbs[i]);
1454
1455	cancel_work_sync(&acm->work);
1456}
1457
1458static void acm_disconnect(struct usb_interface *intf)
1459{
1460	struct acm *acm = usb_get_intfdata(intf);
1461	struct usb_device *usb_dev = interface_to_usbdev(intf);
1462	struct tty_struct *tty;
1463	int i;
1464
1465	dev_dbg(&intf->dev, "%s\n", __func__);
1466
1467	/* sibling interface is already cleaning up */
1468	if (!acm)
1469		return;
1470
1471	mutex_lock(&acm->mutex);
1472	acm->disconnected = true;
 
 
 
 
 
 
 
1473	if (acm->country_codes) {
1474		device_remove_file(&acm->control->dev,
1475				&dev_attr_wCountryCodes);
1476		device_remove_file(&acm->control->dev,
1477				&dev_attr_iCountryCodeRelDate);
1478	}
1479	wake_up_all(&acm->wioctl);
1480	device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1481	usb_set_intfdata(acm->control, NULL);
1482	usb_set_intfdata(acm->data, NULL);
1483	mutex_unlock(&acm->mutex);
1484
1485	tty = tty_port_tty_get(&acm->port);
1486	if (tty) {
1487		tty_vhangup(tty);
1488		tty_kref_put(tty);
1489	}
1490
1491	stop_data_traffic(acm);
1492
1493	tty_unregister_device(acm_tty_driver, acm->minor);
1494
1495	usb_free_urb(acm->ctrlurb);
1496	for (i = 0; i < ACM_NW; i++)
1497		usb_free_urb(acm->wb[i].urb);
1498	for (i = 0; i < acm->rx_buflimit; i++)
1499		usb_free_urb(acm->read_urbs[i]);
1500	acm_write_buffers_free(acm);
1501	usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1502	acm_read_buffers_free(acm);
1503
 
 
1504	if (!acm->combined_interfaces)
1505		usb_driver_release_interface(&acm_driver, intf == acm->control ?
1506					acm->data : acm->control);
1507
1508	tty_port_put(&acm->port);
1509}
1510
1511#ifdef CONFIG_PM
1512static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1513{
1514	struct acm *acm = usb_get_intfdata(intf);
1515	int cnt;
1516
 
1517	if (PMSG_IS_AUTO(message)) {
1518		int b;
1519
1520		spin_lock_irq(&acm->write_lock);
1521		b = acm->transmitting;
1522		spin_unlock_irq(&acm->write_lock);
1523		if (b)
1524			return -EBUSY;
 
1525	}
1526
1527	spin_lock_irq(&acm->read_lock);
1528	spin_lock(&acm->write_lock);
1529	cnt = acm->susp_count++;
1530	spin_unlock(&acm->write_lock);
1531	spin_unlock_irq(&acm->read_lock);
1532
1533	if (cnt)
1534		return 0;
1535
1536	if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1537		stop_data_traffic(acm);
 
1538
1539	return 0;
1540}
1541
1542static int acm_resume(struct usb_interface *intf)
1543{
1544	struct acm *acm = usb_get_intfdata(intf);
1545	struct acm_wb *wb;
1546	int rv = 0;
1547	int cnt;
1548
1549	spin_lock_irq(&acm->read_lock);
1550	acm->susp_count -= 1;
1551	cnt = acm->susp_count;
1552	spin_unlock_irq(&acm->read_lock);
1553
1554	if (cnt)
1555		return 0;
1556
1557	if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
1558		rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO);
1559
1560		spin_lock_irq(&acm->write_lock);
1561		if (acm->delayed_wb) {
1562			wb = acm->delayed_wb;
1563			acm->delayed_wb = NULL;
1564			spin_unlock_irq(&acm->write_lock);
1565			acm_start_wb(acm, wb);
1566		} else {
1567			spin_unlock_irq(&acm->write_lock);
 
1568		}
1569
1570		/*
1571		 * delayed error checking because we must
1572		 * do the write path at all cost
1573		 */
1574		if (rv < 0)
1575			goto err_out;
1576
1577		rv = acm_submit_read_urbs(acm, GFP_NOIO);
1578	}
 
 
1579
1580err_out:
1581	return rv;
1582}
1583
1584static int acm_reset_resume(struct usb_interface *intf)
1585{
1586	struct acm *acm = usb_get_intfdata(intf);
1587
1588	if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1589		tty_port_tty_hangup(&acm->port, false);
1590
1591	return acm_resume(intf);
1592}
1593
1594#endif /* CONFIG_PM */
1595
 
 
 
 
 
 
 
 
 
 
1596#define NOKIA_PCSUITE_ACM_INFO(x) \
1597		USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1598		USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1599		USB_CDC_ACM_PROTO_VENDOR)
1600
1601#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1602		USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1603		USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1604		USB_CDC_ACM_PROTO_VENDOR)
1605
1606/*
1607 * USB driver structure.
1608 */
1609
1610static const struct usb_device_id acm_ids[] = {
1611	/* quirky and broken devices */
 
 
 
 
1612	{ USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1613	.driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1614	{ USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1615	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1616	},
 
 
 
 
 
 
 
 
 
1617	{ USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1618	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1619	},
 
 
 
1620	{ USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1621	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1622	},
1623	{ USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1624	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1625	},
1626	{ USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1627	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1628	},
1629	{ USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1630	.driver_info = SINGLE_RX_URB,
1631	},
1632	{ USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1633	.driver_info = SINGLE_RX_URB, /* firmware bug */
1634	},
1635	{ USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1636	.driver_info = SINGLE_RX_URB, /* firmware bug */
1637	},
 
 
 
 
 
 
1638	{ USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1639	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1640	},
1641	{ USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1642	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1643	},
1644	{ USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1645	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1646	},
1647	{ USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1648	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1649	},
1650	{ USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1651	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1652	},
 
 
 
 
 
 
 
1653	{ USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1654	},
1655	/* Motorola H24 HSPA module: */
1656	{ USB_DEVICE(0x22b8, 0x2d91) }, /* modem                                */
1657	{ USB_DEVICE(0x22b8, 0x2d92),   /* modem           + diagnostics        */
1658	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1659	},
1660	{ USB_DEVICE(0x22b8, 0x2d93),   /* modem + AT port                      */
1661	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1662	},
1663	{ USB_DEVICE(0x22b8, 0x2d95),   /* modem + AT port + diagnostics        */
1664	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1665	},
1666	{ USB_DEVICE(0x22b8, 0x2d96),   /* modem                         + NMEA */
1667	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1668	},
1669	{ USB_DEVICE(0x22b8, 0x2d97),   /* modem           + diagnostics + NMEA */
1670	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1671	},
1672	{ USB_DEVICE(0x22b8, 0x2d99),   /* modem + AT port               + NMEA */
1673	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1674	},
1675	{ USB_DEVICE(0x22b8, 0x2d9a),   /* modem + AT port + diagnostics + NMEA */
1676	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1677	},
1678
1679	{ USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1680	.driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1681					   data interface instead of
1682					   communications interface.
1683					   Maybe we should define a new
1684					   quirk for this. */
1685	},
1686	{ USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1687	.driver_info = NO_UNION_NORMAL,
1688	},
1689	{ USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1690	.driver_info = NO_UNION_NORMAL,
1691	},
1692	{ USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1693	.driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1694	},
1695	{ USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1696	.driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1697	},
 
 
 
 
 
 
 
 
 
 
 
 
 
1698
1699	/* Nokia S60 phones expose two ACM channels. The first is
1700	 * a modem and is picked up by the standard AT-command
1701	 * information below. The second is 'vendor-specific' but
1702	 * is treated as a serial device at the S60 end, so we want
1703	 * to expose it on Linux too. */
1704	{ NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1705	{ NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1706	{ NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1707	{ NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1708	{ NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1709	{ NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1710	{ NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1711	{ NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1712	{ NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1713	{ NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1714	{ NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1715	{ NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1716	{ NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1717	{ NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1718	{ NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1719	{ NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1720	{ NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1721	{ NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i  */
1722	{ NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1723	{ NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1724	{ NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1725	{ NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic &  */
1726	{ NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1727	{ NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1728	{ NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1729	{ NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1730	{ NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1731	{ NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1732	{ NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1733	{ NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1734	{ NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1735	{ NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB  */
1736	{ NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1737	{ NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1738	{ NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1739	{ NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1740	{ NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1741	{ NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1742	{ NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1743	{ NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3  */
1744	{ NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1745	{ NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1746	{ NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1747	{ NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1748	{ NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1749	{ NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1750	{ NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1751	{ NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1752	{ NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1753	{ NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1754	{ NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1755	{ NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1756	{ NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1757	{ NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1758	{ NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1759	{ NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1760	{ NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1761	{ SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1762
1763	/* Support for Owen devices */
1764	{ USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1765
1766	/* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1767
1768	/* Support Lego NXT using pbLua firmware */
1769	{ USB_DEVICE(0x0694, 0xff00),
1770	.driver_info = NOT_A_MODEM,
1771	},
1772
1773	/* Support for Droids MuIn LCD */
1774	{ USB_DEVICE(0x04d8, 0x000b),
1775	.driver_info = NO_DATA_INTERFACE,
1776	},
1777
1778#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1779	{ USB_DEVICE(0x04d8, 0x0082),	/* Application mode */
1780	.driver_info = IGNORE_DEVICE,
1781	},
1782	{ USB_DEVICE(0x04d8, 0x0083),	/* Bootloader mode */
1783	.driver_info = IGNORE_DEVICE,
1784	},
1785#endif
1786
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1787	/* control interfaces without any protocol set */
1788	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1789		USB_CDC_PROTO_NONE) },
1790
1791	/* control interfaces with various AT-command sets */
1792	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1793		USB_CDC_ACM_PROTO_AT_V25TER) },
1794	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1795		USB_CDC_ACM_PROTO_AT_PCCA101) },
1796	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1797		USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1798	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1799		USB_CDC_ACM_PROTO_AT_GSM) },
1800	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1801		USB_CDC_ACM_PROTO_AT_3G) },
1802	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1803		USB_CDC_ACM_PROTO_AT_CDMA) },
1804
 
 
 
 
1805	{ }
1806};
1807
1808MODULE_DEVICE_TABLE(usb, acm_ids);
1809
1810static struct usb_driver acm_driver = {
1811	.name =		"cdc_acm",
1812	.probe =	acm_probe,
1813	.disconnect =	acm_disconnect,
1814#ifdef CONFIG_PM
1815	.suspend =	acm_suspend,
1816	.resume =	acm_resume,
1817	.reset_resume =	acm_reset_resume,
1818#endif
 
1819	.id_table =	acm_ids,
1820#ifdef CONFIG_PM
1821	.supports_autosuspend = 1,
1822#endif
1823	.disable_hub_initiated_lpm = 1,
1824};
1825
1826/*
1827 * TTY driver structures.
1828 */
1829
1830static const struct tty_operations acm_ops = {
1831	.install =		acm_tty_install,
1832	.open =			acm_tty_open,
1833	.close =		acm_tty_close,
1834	.cleanup =		acm_tty_cleanup,
1835	.hangup =		acm_tty_hangup,
1836	.write =		acm_tty_write,
1837	.write_room =		acm_tty_write_room,
1838	.ioctl =		acm_tty_ioctl,
1839	.throttle =		acm_tty_throttle,
1840	.unthrottle =		acm_tty_unthrottle,
1841	.chars_in_buffer =	acm_tty_chars_in_buffer,
1842	.break_ctl =		acm_tty_break_ctl,
1843	.set_termios =		acm_tty_set_termios,
1844	.tiocmget =		acm_tty_tiocmget,
1845	.tiocmset =		acm_tty_tiocmset,
 
 
 
1846};
1847
1848/*
1849 * Init / exit.
1850 */
1851
1852static int __init acm_init(void)
1853{
1854	int retval;
1855	acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1856	if (!acm_tty_driver)
1857		return -ENOMEM;
1858	acm_tty_driver->driver_name = "acm",
1859	acm_tty_driver->name = "ttyACM",
1860	acm_tty_driver->major = ACM_TTY_MAJOR,
1861	acm_tty_driver->minor_start = 0,
1862	acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1863	acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1864	acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1865	acm_tty_driver->init_termios = tty_std_termios;
1866	acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1867								HUPCL | CLOCAL;
1868	tty_set_operations(acm_tty_driver, &acm_ops);
1869
1870	retval = tty_register_driver(acm_tty_driver);
1871	if (retval) {
1872		put_tty_driver(acm_tty_driver);
1873		return retval;
1874	}
1875
1876	retval = usb_register(&acm_driver);
1877	if (retval) {
1878		tty_unregister_driver(acm_tty_driver);
1879		put_tty_driver(acm_tty_driver);
1880		return retval;
1881	}
1882
1883	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1884
1885	return 0;
1886}
1887
1888static void __exit acm_exit(void)
1889{
1890	usb_deregister(&acm_driver);
1891	tty_unregister_driver(acm_tty_driver);
1892	put_tty_driver(acm_tty_driver);
 
1893}
1894
1895module_init(acm_init);
1896module_exit(acm_exit);
1897
1898MODULE_AUTHOR(DRIVER_AUTHOR);
1899MODULE_DESCRIPTION(DRIVER_DESC);
1900MODULE_LICENSE("GPL");
1901MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);