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/idr.h>
  50#include <linux/list.h>
  51
  52#include "cdc-acm.h"
  53
  54
  55#define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
  56#define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
  57
  58static struct usb_driver acm_driver;
  59static struct tty_driver *acm_tty_driver;
  60
  61static DEFINE_IDR(acm_minors);
  62static DEFINE_MUTEX(acm_minors_lock);
  63
  64static void acm_tty_set_termios(struct tty_struct *tty,
  65				struct ktermios *termios_old);
  66
  67/*
  68 * acm_minors accessors
  69 */
  70
  71/*
  72 * Look up an ACM structure by minor. If found and not disconnected, increment
  73 * its refcount and return it with its mutex held.
  74 */
  75static struct acm *acm_get_by_minor(unsigned int minor)
  76{
  77	struct acm *acm;
  78
  79	mutex_lock(&acm_minors_lock);
  80	acm = idr_find(&acm_minors, minor);
  81	if (acm) {
  82		mutex_lock(&acm->mutex);
  83		if (acm->disconnected) {
  84			mutex_unlock(&acm->mutex);
  85			acm = NULL;
  86		} else {
  87			tty_port_get(&acm->port);
  88			mutex_unlock(&acm->mutex);
  89		}
  90	}
  91	mutex_unlock(&acm_minors_lock);
  92	return acm;
  93}
  94
  95/*
  96 * Try to find an available minor number and if found, associate it with 'acm'.
  97 */
  98static int acm_alloc_minor(struct acm *acm)
  99{
 100	int minor;
 101
 102	mutex_lock(&acm_minors_lock);
 103	minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL);
 104	mutex_unlock(&acm_minors_lock);
 105
 106	return minor;
 107}
 108
 109/* Release the minor number associated with 'acm'.  */
 110static void acm_release_minor(struct acm *acm)
 111{
 112	mutex_lock(&acm_minors_lock);
 113	idr_remove(&acm_minors, acm->minor);
 114	mutex_unlock(&acm_minors_lock);
 115}
 116
 117/*
 118 * Functions for ACM control messages.
 119 */
 120
 121static int acm_ctrl_msg(struct acm *acm, int request, int value,
 122							void *buf, int len)
 123{
 124	int retval;
 125
 126	retval = usb_autopm_get_interface(acm->control);
 127	if (retval)
 128		return retval;
 129
 130	retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
 131		request, USB_RT_ACM, value,
 132		acm->control->altsetting[0].desc.bInterfaceNumber,
 133		buf, len, 5000);
 134
 135	dev_dbg(&acm->control->dev,
 136			"%s - rq 0x%02x, val %#x, len %#x, result %d\n",
 137			__func__, request, value, len, retval);
 138
 139	usb_autopm_put_interface(acm->control);
 140
 141	return retval < 0 ? retval : 0;
 142}
 143
 144/* devices aren't required to support these requests.
 145 * the cdc acm descriptor tells whether they do...
 146 */
 147static inline int acm_set_control(struct acm *acm, int control)
 148{
 149	if (acm->quirks & QUIRK_CONTROL_LINE_STATE)
 150		return -EOPNOTSUPP;
 151
 152	return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
 153			control, NULL, 0);
 154}
 155
 156#define acm_set_line(acm, line) \
 157	acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
 158#define acm_send_break(acm, ms) \
 159	acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
 160
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 161/*
 162 * Write buffer management.
 163 * All of these assume proper locks taken by the caller.
 164 */
 165
 166static int acm_wb_alloc(struct acm *acm)
 167{
 168	int i, wbn;
 169	struct acm_wb *wb;
 170
 171	wbn = 0;
 172	i = 0;
 173	for (;;) {
 174		wb = &acm->wb[wbn];
 175		if (!wb->use) {
 176			wb->use = 1;
 
 177			return wbn;
 178		}
 179		wbn = (wbn + 1) % ACM_NW;
 180		if (++i >= ACM_NW)
 181			return -1;
 182	}
 183}
 184
 185static int acm_wb_is_avail(struct acm *acm)
 186{
 187	int i, n;
 188	unsigned long flags;
 189
 190	n = ACM_NW;
 191	spin_lock_irqsave(&acm->write_lock, flags);
 192	for (i = 0; i < ACM_NW; i++)
 193		n -= acm->wb[i].use;
 
 194	spin_unlock_irqrestore(&acm->write_lock, flags);
 195	return n;
 196}
 197
 198/*
 199 * Finish write. Caller must hold acm->write_lock
 200 */
 201static void acm_write_done(struct acm *acm, struct acm_wb *wb)
 202{
 203	wb->use = 0;
 204	acm->transmitting--;
 205	usb_autopm_put_interface_async(acm->control);
 206}
 207
 208/*
 209 * Poke write.
 210 *
 211 * the caller is responsible for locking
 212 */
 213
 214static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
 215{
 216	int rc;
 217
 218	acm->transmitting++;
 219
 220	wb->urb->transfer_buffer = wb->buf;
 221	wb->urb->transfer_dma = wb->dmah;
 222	wb->urb->transfer_buffer_length = wb->len;
 223	wb->urb->dev = acm->dev;
 224
 225	rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
 226	if (rc < 0) {
 227		dev_err(&acm->data->dev,
 228			"%s - usb_submit_urb(write bulk) failed: %d\n",
 229			__func__, rc);
 
 230		acm_write_done(acm, wb);
 231	}
 232	return rc;
 233}
 234
 235/*
 236 * attributes exported through sysfs
 237 */
 238static ssize_t show_caps
 239(struct device *dev, struct device_attribute *attr, char *buf)
 240{
 241	struct usb_interface *intf = to_usb_interface(dev);
 242	struct acm *acm = usb_get_intfdata(intf);
 243
 244	return sprintf(buf, "%d", acm->ctrl_caps);
 245}
 246static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
 247
 248static ssize_t show_country_codes
 249(struct device *dev, struct device_attribute *attr, char *buf)
 250{
 251	struct usb_interface *intf = to_usb_interface(dev);
 252	struct acm *acm = usb_get_intfdata(intf);
 253
 254	memcpy(buf, acm->country_codes, acm->country_code_size);
 255	return acm->country_code_size;
 256}
 257
 258static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
 259
 260static ssize_t show_country_rel_date
 261(struct device *dev, struct device_attribute *attr, char *buf)
 262{
 263	struct usb_interface *intf = to_usb_interface(dev);
 264	struct acm *acm = usb_get_intfdata(intf);
 265
 266	return sprintf(buf, "%d", acm->country_rel_date);
 267}
 268
 269static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
 270/*
 271 * Interrupt handlers for various ACM device responses
 272 */
 273
 274/* control interface reports status changes with "interrupt" transfers */
 275static void acm_ctrl_irq(struct urb *urb)
 276{
 277	struct acm *acm = urb->context;
 278	struct usb_cdc_notification *dr = urb->transfer_buffer;
 279	unsigned char *data;
 280	int newctrl;
 281	int difference;
 282	int retval;
 283	int status = urb->status;
 284
 285	switch (status) {
 286	case 0:
 287		/* success */
 288		break;
 289	case -ECONNRESET:
 290	case -ENOENT:
 291	case -ESHUTDOWN:
 292		/* this urb is terminated, clean up */
 293		dev_dbg(&acm->control->dev,
 294				"%s - urb shutting down with status: %d\n",
 295				__func__, status);
 296		return;
 297	default:
 298		dev_dbg(&acm->control->dev,
 299				"%s - nonzero urb status received: %d\n",
 300				__func__, status);
 301		goto exit;
 302	}
 303
 304	usb_mark_last_busy(acm->dev);
 305
 306	data = (unsigned char *)(dr + 1);
 307	switch (dr->bNotificationType) {
 308	case USB_CDC_NOTIFY_NETWORK_CONNECTION:
 309		dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
 310							__func__, dr->wValue);
 311		break;
 312
 313	case USB_CDC_NOTIFY_SERIAL_STATE:
 
 
 
 
 
 
 314		newctrl = get_unaligned_le16(data);
 
 
 315
 316		if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
 317			dev_dbg(&acm->control->dev, "%s - calling hangup\n",
 318					__func__);
 319			tty_port_tty_hangup(&acm->port, false);
 320		}
 321
 322		difference = acm->ctrlin ^ newctrl;
 323		spin_lock(&acm->read_lock);
 324		acm->ctrlin = newctrl;
 325		acm->oldcount = acm->iocount;
 326
 327		if (difference & ACM_CTRL_DSR)
 328			acm->iocount.dsr++;
 329		if (difference & ACM_CTRL_BRK)
 
 
 330			acm->iocount.brk++;
 331		if (difference & ACM_CTRL_RI)
 
 
 332			acm->iocount.rng++;
 333		if (difference & ACM_CTRL_DCD)
 334			acm->iocount.dcd++;
 335		if (difference & ACM_CTRL_FRAMING)
 336			acm->iocount.frame++;
 337		if (difference & ACM_CTRL_PARITY)
 338			acm->iocount.parity++;
 339		if (difference & ACM_CTRL_OVERRUN)
 340			acm->iocount.overrun++;
 341		spin_unlock(&acm->read_lock);
 
 
 
 342
 343		if (difference)
 344			wake_up_all(&acm->wioctl);
 345
 346		break;
 347
 348	default:
 349		dev_dbg(&acm->control->dev,
 350			"%s - unknown notification %d received: index %d "
 351			"len %d data0 %d data1 %d\n",
 352			__func__,
 353			dr->bNotificationType, dr->wIndex,
 354			dr->wLength, data[0], data[1]);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 355		break;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 356	}
 
 357exit:
 358	retval = usb_submit_urb(urb, GFP_ATOMIC);
 359	if (retval && retval != -EPERM)
 360		dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
 361							__func__, retval);
 
 
 
 362}
 363
 364static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
 365{
 366	int res;
 367
 368	if (!test_and_clear_bit(index, &acm->read_urbs_free))
 369		return 0;
 370
 371	dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
 372
 373	res = usb_submit_urb(acm->read_urbs[index], mem_flags);
 374	if (res) {
 375		if (res != -EPERM) {
 376			dev_err(&acm->data->dev,
 377					"%s - usb_submit_urb failed: %d\n",
 378					__func__, res);
 
 
 379		}
 380		set_bit(index, &acm->read_urbs_free);
 381		return res;
 
 
 382	}
 383
 384	return 0;
 385}
 386
 387static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
 388{
 389	int res;
 390	int i;
 391
 392	for (i = 0; i < acm->rx_buflimit; ++i) {
 393		res = acm_submit_read_urb(acm, i, mem_flags);
 394		if (res)
 395			return res;
 396	}
 397
 398	return 0;
 399}
 400
 401static void acm_process_read_urb(struct acm *acm, struct urb *urb)
 402{
 
 
 403	if (!urb->actual_length)
 404		return;
 405
 
 406	tty_insert_flip_string(&acm->port, urb->transfer_buffer,
 407			urb->actual_length);
 
 
 408	tty_flip_buffer_push(&acm->port);
 409}
 410
 411static void acm_read_bulk_callback(struct urb *urb)
 412{
 413	struct acm_rb *rb = urb->context;
 414	struct acm *acm = rb->instance;
 415	unsigned long flags;
 416	int status = urb->status;
 
 
 
 417
 418	dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
 419					rb->index, urb->actual_length);
 420
 421	if (!acm->dev) {
 422		set_bit(rb->index, &acm->read_urbs_free);
 423		dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
 424		return;
 425	}
 426
 427	if (status) {
 428		set_bit(rb->index, &acm->read_urbs_free);
 429		dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
 430							__func__, status);
 431		if ((status != -ENOENT) || (urb->actual_length == 0))
 432			return;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 433	}
 434
 435	usb_mark_last_busy(acm->dev);
 436
 437	acm_process_read_urb(acm, urb);
 438	/*
 439	 * Unthrottle may run on another CPU which needs to see events
 440	 * in the same order. Submission has an implict barrier
 
 441	 */
 442	smp_mb__before_atomic();
 443	set_bit(rb->index, &acm->read_urbs_free);
 
 
 
 
 
 
 444
 445	/* throttle device if requested by tty */
 446	spin_lock_irqsave(&acm->read_lock, flags);
 447	acm->throttled = acm->throttle_req;
 448	if (!acm->throttled) {
 449		spin_unlock_irqrestore(&acm->read_lock, flags);
 450		acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
 451	} else {
 452		spin_unlock_irqrestore(&acm->read_lock, flags);
 453	}
 
 
 
 
 
 454}
 455
 456/* data interface wrote those outgoing bytes */
 457static void acm_write_bulk(struct urb *urb)
 458{
 459	struct acm_wb *wb = urb->context;
 460	struct acm *acm = wb->instance;
 461	unsigned long flags;
 462	int status = urb->status;
 463
 464	if (status || (urb->actual_length != urb->transfer_buffer_length))
 465		dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
 466			__func__,
 467			urb->actual_length,
 468			urb->transfer_buffer_length,
 469			status);
 470
 471	spin_lock_irqsave(&acm->write_lock, flags);
 472	acm_write_done(acm, wb);
 473	spin_unlock_irqrestore(&acm->write_lock, flags);
 474	schedule_work(&acm->work);
 
 475}
 476
 477static void acm_softint(struct work_struct *work)
 478{
 479	struct acm *acm = container_of(work, struct acm, work);
 
 480
 481	dev_vdbg(&acm->data->dev, "%s\n", __func__);
 
 
 
 
 
 
 
 
 
 482
 483	tty_port_tty_wakeup(&acm->port);
 
 
 
 
 
 
 
 484}
 485
 486/*
 487 * TTY handlers
 488 */
 489
 490static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
 491{
 492	struct acm *acm;
 493	int retval;
 494
 495	dev_dbg(tty->dev, "%s\n", __func__);
 496
 497	acm = acm_get_by_minor(tty->index);
 498	if (!acm)
 499		return -ENODEV;
 500
 501	retval = tty_standard_install(driver, tty);
 502	if (retval)
 503		goto error_init_termios;
 504
 
 
 
 
 
 
 
 505	tty->driver_data = acm;
 506
 507	return 0;
 508
 509error_init_termios:
 510	tty_port_put(&acm->port);
 511	return retval;
 512}
 513
 514static int acm_tty_open(struct tty_struct *tty, struct file *filp)
 515{
 516	struct acm *acm = tty->driver_data;
 517
 518	dev_dbg(tty->dev, "%s\n", __func__);
 519
 520	return tty_port_open(&acm->port, tty, filp);
 521}
 522
 523static void acm_port_dtr_rts(struct tty_port *port, int raise)
 524{
 525	struct acm *acm = container_of(port, struct acm, port);
 526	int val;
 527	int res;
 528
 529	if (raise)
 530		val = ACM_CTRL_DTR | ACM_CTRL_RTS;
 531	else
 532		val = 0;
 533
 534	/* FIXME: add missing ctrlout locking throughout driver */
 535	acm->ctrlout = val;
 536
 537	res = acm_set_control(acm, val);
 538	if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE))
 539		dev_err(&acm->control->dev, "failed to set dtr/rts\n");
 
 540}
 541
 542static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
 543{
 544	struct acm *acm = container_of(port, struct acm, port);
 545	int retval = -ENODEV;
 546	int i;
 547
 548	dev_dbg(&acm->control->dev, "%s\n", __func__);
 549
 550	mutex_lock(&acm->mutex);
 551	if (acm->disconnected)
 552		goto disconnected;
 553
 554	retval = usb_autopm_get_interface(acm->control);
 555	if (retval)
 556		goto error_get_interface;
 557
 558	/*
 559	 * FIXME: Why do we need this? Allocating 64K of physically contiguous
 560	 * memory is really nasty...
 561	 */
 562	set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
 563	acm->control->needs_remote_wakeup = 1;
 564
 565	acm->ctrlurb->dev = acm->dev;
 566	retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
 567	if (retval) {
 568		dev_err(&acm->control->dev,
 569			"%s - usb_submit_urb(ctrl irq) failed\n", __func__);
 570		goto error_submit_urb;
 571	}
 572
 573	acm_tty_set_termios(tty, NULL);
 574
 575	/*
 576	 * Unthrottle device in case the TTY was closed while throttled.
 577	 */
 578	spin_lock_irq(&acm->read_lock);
 579	acm->throttled = 0;
 580	acm->throttle_req = 0;
 581	spin_unlock_irq(&acm->read_lock);
 582
 583	retval = acm_submit_read_urbs(acm, GFP_KERNEL);
 584	if (retval)
 585		goto error_submit_read_urbs;
 586
 587	usb_autopm_put_interface(acm->control);
 588
 589	mutex_unlock(&acm->mutex);
 590
 591	return 0;
 592
 593error_submit_read_urbs:
 594	for (i = 0; i < acm->rx_buflimit; i++)
 595		usb_kill_urb(acm->read_urbs[i]);
 596	usb_kill_urb(acm->ctrlurb);
 597error_submit_urb:
 598	usb_autopm_put_interface(acm->control);
 599error_get_interface:
 600disconnected:
 601	mutex_unlock(&acm->mutex);
 602
 603	return usb_translate_errors(retval);
 604}
 605
 606static void acm_port_destruct(struct tty_port *port)
 607{
 608	struct acm *acm = container_of(port, struct acm, port);
 609
 610	dev_dbg(&acm->control->dev, "%s\n", __func__);
 611
 612	acm_release_minor(acm);
 613	usb_put_intf(acm->control);
 614	kfree(acm->country_codes);
 615	kfree(acm);
 616}
 617
 618static void acm_port_shutdown(struct tty_port *port)
 619{
 620	struct acm *acm = container_of(port, struct acm, port);
 621	struct urb *urb;
 622	struct acm_wb *wb;
 623	int i;
 624
 625	dev_dbg(&acm->control->dev, "%s\n", __func__);
 626
 627	/*
 628	 * Need to grab write_lock to prevent race with resume, but no need to
 629	 * hold it due to the tty-port initialised flag.
 630	 */
 
 631	spin_lock_irq(&acm->write_lock);
 632	spin_unlock_irq(&acm->write_lock);
 633
 634	usb_autopm_get_interface_no_resume(acm->control);
 635	acm->control->needs_remote_wakeup = 0;
 636	usb_autopm_put_interface(acm->control);
 637
 638	for (;;) {
 639		urb = usb_get_from_anchor(&acm->delayed);
 640		if (!urb)
 641			break;
 642		wb = urb->context;
 643		wb->use = 0;
 644		usb_autopm_put_interface_async(acm->control);
 645	}
 646
 647	usb_kill_urb(acm->ctrlurb);
 648	for (i = 0; i < ACM_NW; i++)
 649		usb_kill_urb(acm->wb[i].urb);
 650	for (i = 0; i < acm->rx_buflimit; i++)
 651		usb_kill_urb(acm->read_urbs[i]);
 652}
 653
 654static void acm_tty_cleanup(struct tty_struct *tty)
 655{
 656	struct acm *acm = tty->driver_data;
 657	dev_dbg(&acm->control->dev, "%s\n", __func__);
 658	tty_port_put(&acm->port);
 659}
 660
 661static void acm_tty_hangup(struct tty_struct *tty)
 662{
 663	struct acm *acm = tty->driver_data;
 664	dev_dbg(&acm->control->dev, "%s\n", __func__);
 665	tty_port_hangup(&acm->port);
 666}
 667
 668static void acm_tty_close(struct tty_struct *tty, struct file *filp)
 669{
 670	struct acm *acm = tty->driver_data;
 671	dev_dbg(&acm->control->dev, "%s\n", __func__);
 672	tty_port_close(&acm->port, tty, filp);
 673}
 674
 675static int acm_tty_write(struct tty_struct *tty,
 676					const unsigned char *buf, int count)
 677{
 678	struct acm *acm = tty->driver_data;
 679	int stat;
 680	unsigned long flags;
 681	int wbn;
 682	struct acm_wb *wb;
 683
 684	if (!count)
 685		return 0;
 686
 687	dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
 688
 689	spin_lock_irqsave(&acm->write_lock, flags);
 690	wbn = acm_wb_alloc(acm);
 691	if (wbn < 0) {
 692		spin_unlock_irqrestore(&acm->write_lock, flags);
 693		return 0;
 694	}
 695	wb = &acm->wb[wbn];
 696
 697	if (!acm->dev) {
 698		wb->use = 0;
 699		spin_unlock_irqrestore(&acm->write_lock, flags);
 700		return -ENODEV;
 701	}
 702
 703	count = (count > acm->writesize) ? acm->writesize : count;
 704	dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
 705	memcpy(wb->buf, buf, count);
 706	wb->len = count;
 707
 708	stat = usb_autopm_get_interface_async(acm->control);
 709	if (stat) {
 710		wb->use = 0;
 711		spin_unlock_irqrestore(&acm->write_lock, flags);
 712		return stat;
 713	}
 714
 715	if (acm->susp_count) {
 716		if (acm->putbuffer) {
 717			/* now to preserve order */
 718			usb_anchor_urb(acm->putbuffer->urb, &acm->delayed);
 719			acm->putbuffer = NULL;
 720		}
 721		usb_anchor_urb(wb->urb, &acm->delayed);
 722		spin_unlock_irqrestore(&acm->write_lock, flags);
 723		return count;
 724	} else {
 725		if (acm->putbuffer) {
 726			/* at this point there is no good way to handle errors */
 727			acm_start_wb(acm, acm->putbuffer);
 728			acm->putbuffer = NULL;
 729		}
 730	}
 731
 732	stat = acm_start_wb(acm, wb);
 733	spin_unlock_irqrestore(&acm->write_lock, flags);
 734
 735	if (stat < 0)
 736		return stat;
 737	return count;
 738}
 739
 740static void acm_tty_flush_chars(struct tty_struct *tty)
 741{
 742	struct acm *acm = tty->driver_data;
 743	struct acm_wb *cur = acm->putbuffer;
 744	int err;
 745	unsigned long flags;
 746
 747	if (!cur) /* nothing to do */
 748		return;
 749
 750	acm->putbuffer = NULL;
 751	err = usb_autopm_get_interface_async(acm->control);
 752	spin_lock_irqsave(&acm->write_lock, flags);
 753	if (err < 0) {
 754		cur->use = 0;
 755		acm->putbuffer = cur;
 756		goto out;
 757	}
 758
 759	if (acm->susp_count)
 760		usb_anchor_urb(cur->urb, &acm->delayed);
 761	else
 762		acm_start_wb(acm, cur);
 763out:
 764	spin_unlock_irqrestore(&acm->write_lock, flags);
 765	return;
 766}
 767
 768static int acm_tty_put_char(struct tty_struct *tty, unsigned char ch)
 769{
 770	struct acm *acm = tty->driver_data;
 771	struct acm_wb *cur;
 772	int wbn;
 773	unsigned long flags;
 774
 775overflow:
 776	cur = acm->putbuffer;
 777	if (!cur) {
 778		spin_lock_irqsave(&acm->write_lock, flags);
 779		wbn = acm_wb_alloc(acm);
 780		if (wbn >= 0) {
 781			cur = &acm->wb[wbn];
 782			acm->putbuffer = cur;
 783		}
 784		spin_unlock_irqrestore(&acm->write_lock, flags);
 785		if (!cur)
 786			return 0;
 787	}
 788
 789	if (cur->len == acm->writesize) {
 790		acm_tty_flush_chars(tty);
 791		goto overflow;
 792	}
 793
 794	cur->buf[cur->len++] = ch;
 795	return 1;
 796}
 797
 798static int acm_tty_write_room(struct tty_struct *tty)
 799{
 800	struct acm *acm = tty->driver_data;
 801	/*
 802	 * Do not let the line discipline to know that we have a reserve,
 803	 * or it might get too enthusiastic.
 804	 */
 805	return acm_wb_is_avail(acm) ? acm->writesize : 0;
 806}
 807
 808static int acm_tty_chars_in_buffer(struct tty_struct *tty)
 809{
 810	struct acm *acm = tty->driver_data;
 811	/*
 812	 * if the device was unplugged then any remaining characters fell out
 813	 * of the connector ;)
 814	 */
 815	if (acm->disconnected)
 816		return 0;
 817	/*
 818	 * This is inaccurate (overcounts), but it works.
 819	 */
 820	return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
 821}
 822
 823static void acm_tty_throttle(struct tty_struct *tty)
 824{
 825	struct acm *acm = tty->driver_data;
 826
 827	spin_lock_irq(&acm->read_lock);
 828	acm->throttle_req = 1;
 829	spin_unlock_irq(&acm->read_lock);
 830}
 831
 832static void acm_tty_unthrottle(struct tty_struct *tty)
 833{
 834	struct acm *acm = tty->driver_data;
 835	unsigned int was_throttled;
 836
 837	spin_lock_irq(&acm->read_lock);
 838	was_throttled = acm->throttled;
 839	acm->throttled = 0;
 840	acm->throttle_req = 0;
 841	spin_unlock_irq(&acm->read_lock);
 842
 843	if (was_throttled)
 844		acm_submit_read_urbs(acm, GFP_KERNEL);
 845}
 846
 847static int acm_tty_break_ctl(struct tty_struct *tty, int state)
 848{
 849	struct acm *acm = tty->driver_data;
 850	int retval;
 851
 852	retval = acm_send_break(acm, state ? 0xffff : 0);
 853	if (retval < 0)
 854		dev_dbg(&acm->control->dev, "%s - send break failed\n",
 855								__func__);
 856	return retval;
 857}
 858
 859static int acm_tty_tiocmget(struct tty_struct *tty)
 860{
 861	struct acm *acm = tty->driver_data;
 862
 863	return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
 864	       (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
 865	       (acm->ctrlin  & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
 866	       (acm->ctrlin  & ACM_CTRL_RI  ? TIOCM_RI  : 0) |
 867	       (acm->ctrlin  & ACM_CTRL_DCD ? TIOCM_CD  : 0) |
 868	       TIOCM_CTS;
 869}
 870
 871static int acm_tty_tiocmset(struct tty_struct *tty,
 872			    unsigned int set, unsigned int clear)
 873{
 874	struct acm *acm = tty->driver_data;
 875	unsigned int newctrl;
 876
 877	newctrl = acm->ctrlout;
 878	set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
 879					(set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
 880	clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
 881					(clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
 882
 883	newctrl = (newctrl & ~clear) | set;
 884
 885	if (acm->ctrlout == newctrl)
 886		return 0;
 887	return acm_set_control(acm, acm->ctrlout = newctrl);
 888}
 889
 890static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
 891{
 892	struct serial_struct tmp;
 893
 894	if (!info)
 895		return -EINVAL;
 896
 897	memset(&tmp, 0, sizeof(tmp));
 898	tmp.flags = ASYNC_LOW_LATENCY;
 899	tmp.xmit_fifo_size = acm->writesize;
 900	tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
 901	tmp.close_delay	= acm->port.close_delay / 10;
 902	tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
 903				ASYNC_CLOSING_WAIT_NONE :
 904				acm->port.closing_wait / 10;
 905
 906	if (copy_to_user(info, &tmp, sizeof(tmp)))
 907		return -EFAULT;
 908	else
 909		return 0;
 910}
 911
 912static int set_serial_info(struct acm *acm,
 913				struct serial_struct __user *newinfo)
 914{
 915	struct serial_struct new_serial;
 916	unsigned int closing_wait, close_delay;
 917	int retval = 0;
 918
 919	if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
 920		return -EFAULT;
 921
 922	close_delay = new_serial.close_delay * 10;
 923	closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
 924			ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
 925
 926	mutex_lock(&acm->port.mutex);
 927
 928	if (!capable(CAP_SYS_ADMIN)) {
 929		if ((close_delay != acm->port.close_delay) ||
 930		    (closing_wait != acm->port.closing_wait))
 931			retval = -EPERM;
 932		else
 933			retval = -EOPNOTSUPP;
 934	} else {
 935		acm->port.close_delay  = close_delay;
 936		acm->port.closing_wait = closing_wait;
 937	}
 938
 939	mutex_unlock(&acm->port.mutex);
 940	return retval;
 941}
 942
 943static int wait_serial_change(struct acm *acm, unsigned long arg)
 944{
 945	int rv = 0;
 946	DECLARE_WAITQUEUE(wait, current);
 947	struct async_icount old, new;
 948
 949	if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD ))
 950		return -EINVAL;
 951	do {
 952		spin_lock_irq(&acm->read_lock);
 953		old = acm->oldcount;
 954		new = acm->iocount;
 955		acm->oldcount = new;
 956		spin_unlock_irq(&acm->read_lock);
 957
 958		if ((arg & TIOCM_DSR) &&
 959			old.dsr != new.dsr)
 960			break;
 961		if ((arg & TIOCM_CD)  &&
 962			old.dcd != new.dcd)
 963			break;
 964		if ((arg & TIOCM_RI) &&
 965			old.rng != new.rng)
 966			break;
 967
 968		add_wait_queue(&acm->wioctl, &wait);
 969		set_current_state(TASK_INTERRUPTIBLE);
 970		schedule();
 971		remove_wait_queue(&acm->wioctl, &wait);
 972		if (acm->disconnected) {
 973			if (arg & TIOCM_CD)
 974				break;
 975			else
 976				rv = -ENODEV;
 977		} else {
 978			if (signal_pending(current))
 979				rv = -ERESTARTSYS;
 980		}
 981	} while (!rv);
 982
 983	
 984
 985	return rv;
 986}
 987
 988static int get_serial_usage(struct acm *acm,
 989			    struct serial_icounter_struct __user *count)
 990{
 991	struct serial_icounter_struct icount;
 992	int rv = 0;
 993
 994	memset(&icount, 0, sizeof(icount));
 995	icount.dsr = acm->iocount.dsr;
 996	icount.rng = acm->iocount.rng;
 997	icount.dcd = acm->iocount.dcd;
 998	icount.frame = acm->iocount.frame;
 999	icount.overrun = acm->iocount.overrun;
1000	icount.parity = acm->iocount.parity;
1001	icount.brk = acm->iocount.brk;
1002
1003	if (copy_to_user(count, &icount, sizeof(icount)) > 0)
1004		rv = -EFAULT;
 
 
 
 
 
1005
1006	return rv;
1007}
1008
1009static int acm_tty_ioctl(struct tty_struct *tty,
1010					unsigned int cmd, unsigned long arg)
1011{
1012	struct acm *acm = tty->driver_data;
1013	int rv = -ENOIOCTLCMD;
1014
1015	switch (cmd) {
1016	case TIOCGSERIAL: /* gets serial port data */
1017		rv = get_serial_info(acm, (struct serial_struct __user *) arg);
1018		break;
1019	case TIOCSSERIAL:
1020		rv = set_serial_info(acm, (struct serial_struct __user *) arg);
1021		break;
1022	case TIOCMIWAIT:
1023		rv = usb_autopm_get_interface(acm->control);
1024		if (rv < 0) {
1025			rv = -EIO;
1026			break;
1027		}
1028		rv = wait_serial_change(acm, arg);
1029		usb_autopm_put_interface(acm->control);
1030		break;
1031	case TIOCGICOUNT:
1032		rv = get_serial_usage(acm, (struct serial_icounter_struct __user *) arg);
1033		break;
1034	}
1035
1036	return rv;
1037}
1038
1039static void acm_tty_set_termios(struct tty_struct *tty,
1040						struct ktermios *termios_old)
1041{
1042	struct acm *acm = tty->driver_data;
1043	struct ktermios *termios = &tty->termios;
1044	struct usb_cdc_line_coding newline;
1045	int newctrl = acm->ctrlout;
1046
1047	newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1048	newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1049	newline.bParityType = termios->c_cflag & PARENB ?
1050				(termios->c_cflag & PARODD ? 1 : 2) +
1051				(termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1052	switch (termios->c_cflag & CSIZE) {
1053	case CS5:
1054		newline.bDataBits = 5;
1055		break;
1056	case CS6:
1057		newline.bDataBits = 6;
1058		break;
1059	case CS7:
1060		newline.bDataBits = 7;
1061		break;
1062	case CS8:
1063	default:
1064		newline.bDataBits = 8;
1065		break;
1066	}
1067	/* FIXME: Needs to clear unsupported bits in the termios */
1068	acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1069
1070	if (C_BAUD(tty) == B0) {
1071		newline.dwDTERate = acm->line.dwDTERate;
1072		newctrl &= ~ACM_CTRL_DTR;
1073	} else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1074		newctrl |=  ACM_CTRL_DTR;
1075	}
1076
1077	if (newctrl != acm->ctrlout)
1078		acm_set_control(acm, acm->ctrlout = newctrl);
1079
1080	if (memcmp(&acm->line, &newline, sizeof newline)) {
1081		memcpy(&acm->line, &newline, sizeof newline);
1082		dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1083			__func__,
1084			le32_to_cpu(newline.dwDTERate),
1085			newline.bCharFormat, newline.bParityType,
1086			newline.bDataBits);
1087		acm_set_line(acm, &acm->line);
1088	}
1089}
1090
1091static const struct tty_port_operations acm_port_ops = {
1092	.dtr_rts = acm_port_dtr_rts,
1093	.shutdown = acm_port_shutdown,
1094	.activate = acm_port_activate,
1095	.destruct = acm_port_destruct,
1096};
1097
1098/*
1099 * USB probe and disconnect routines.
1100 */
1101
1102/* Little helpers: write/read buffers free */
1103static void acm_write_buffers_free(struct acm *acm)
1104{
1105	int i;
1106	struct acm_wb *wb;
1107	struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1108
1109	for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1110		usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
1111}
1112
1113static void acm_read_buffers_free(struct acm *acm)
1114{
1115	struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1116	int i;
1117
1118	for (i = 0; i < acm->rx_buflimit; i++)
1119		usb_free_coherent(usb_dev, acm->readsize,
1120			  acm->read_buffers[i].base, acm->read_buffers[i].dma);
1121}
1122
1123/* Little helper: write buffers allocate */
1124static int acm_write_buffers_alloc(struct acm *acm)
1125{
1126	int i;
1127	struct acm_wb *wb;
1128
1129	for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1130		wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1131		    &wb->dmah);
1132		if (!wb->buf) {
1133			while (i != 0) {
1134				--i;
1135				--wb;
1136				usb_free_coherent(acm->dev, acm->writesize,
1137				    wb->buf, wb->dmah);
1138			}
1139			return -ENOMEM;
1140		}
1141	}
1142	return 0;
1143}
1144
1145static int acm_probe(struct usb_interface *intf,
1146		     const struct usb_device_id *id)
1147{
1148	struct usb_cdc_union_desc *union_header = NULL;
1149	struct usb_cdc_country_functional_desc *cfd = NULL;
1150	unsigned char *buffer = intf->altsetting->extra;
1151	int buflen = intf->altsetting->extralen;
1152	struct usb_interface *control_interface;
1153	struct usb_interface *data_interface;
1154	struct usb_endpoint_descriptor *epctrl = NULL;
1155	struct usb_endpoint_descriptor *epread = NULL;
1156	struct usb_endpoint_descriptor *epwrite = NULL;
1157	struct usb_device *usb_dev = interface_to_usbdev(intf);
 
1158	struct acm *acm;
1159	int minor;
1160	int ctrlsize, readsize;
1161	u8 *buf;
1162	u8 ac_management_function = 0;
1163	u8 call_management_function = 0;
1164	int call_interface_num = -1;
1165	int data_interface_num = -1;
1166	unsigned long quirks;
1167	int num_rx_buf;
1168	int i;
1169	unsigned int elength = 0;
1170	int combined_interfaces = 0;
1171	struct device *tty_dev;
1172	int rv = -ENOMEM;
 
1173
1174	/* normal quirks */
1175	quirks = (unsigned long)id->driver_info;
1176
1177	if (quirks == IGNORE_DEVICE)
1178		return -ENODEV;
1179
 
 
1180	num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1181
1182	/* handle quirks deadly to normal probing*/
1183	if (quirks == NO_UNION_NORMAL) {
1184		data_interface = usb_ifnum_to_if(usb_dev, 1);
1185		control_interface = usb_ifnum_to_if(usb_dev, 0);
1186		/* we would crash */
1187		if (!data_interface || !control_interface)
1188			return -ENODEV;
1189		goto skip_normal_probe;
1190	}
1191
1192	/* normal probing*/
1193	if (!buffer) {
1194		dev_err(&intf->dev, "Weird descriptor references\n");
1195		return -EINVAL;
1196	}
1197
1198	if (!buflen) {
1199		if (intf->cur_altsetting->endpoint &&
1200				intf->cur_altsetting->endpoint->extralen &&
1201				intf->cur_altsetting->endpoint->extra) {
1202			dev_dbg(&intf->dev,
1203				"Seeking extra descriptors on endpoint\n");
1204			buflen = intf->cur_altsetting->endpoint->extralen;
1205			buffer = intf->cur_altsetting->endpoint->extra;
1206		} else {
1207			dev_err(&intf->dev,
1208				"Zero length descriptor references\n");
1209			return -EINVAL;
1210		}
1211	}
1212
1213	while (buflen > 0) {
1214		elength = buffer[0];
1215		if (!elength) {
1216			dev_err(&intf->dev, "skipping garbage byte\n");
1217			elength = 1;
1218			goto next_desc;
1219		}
1220		if (buffer[1] != USB_DT_CS_INTERFACE) {
1221			dev_err(&intf->dev, "skipping garbage\n");
1222			goto next_desc;
1223		}
1224
1225		switch (buffer[2]) {
1226		case USB_CDC_UNION_TYPE: /* we've found it */
1227			if (elength < sizeof(struct usb_cdc_union_desc))
1228				goto next_desc;
1229			if (union_header) {
1230				dev_err(&intf->dev, "More than one "
1231					"union descriptor, skipping ...\n");
1232				goto next_desc;
1233			}
1234			union_header = (struct usb_cdc_union_desc *)buffer;
1235			break;
1236		case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1237			if (elength < sizeof(struct usb_cdc_country_functional_desc))
1238				goto next_desc;
1239			cfd = (struct usb_cdc_country_functional_desc *)buffer;
1240			break;
1241		case USB_CDC_HEADER_TYPE: /* maybe check version */
1242			break; /* for now we ignore it */
1243		case USB_CDC_ACM_TYPE:
1244			if (elength < 4)
1245				goto next_desc;
1246			ac_management_function = buffer[3];
1247			break;
1248		case USB_CDC_CALL_MANAGEMENT_TYPE:
1249			if (elength < 5)
1250				goto next_desc;
1251			call_management_function = buffer[3];
1252			call_interface_num = buffer[4];
1253			break;
1254		default:
1255			/*
1256			 * there are LOTS more CDC descriptors that
1257			 * could legitimately be found here.
1258			 */
1259			dev_dbg(&intf->dev, "Ignoring descriptor: "
1260					"type %02x, length %ud\n",
1261					buffer[2], elength);
1262			break;
1263		}
1264next_desc:
1265		buflen -= elength;
1266		buffer += elength;
1267	}
1268
1269	if (!union_header) {
1270		if (call_interface_num > 0) {
 
 
 
 
 
1271			dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1272			/* quirks for Droids MuIn LCD */
1273			if (quirks & NO_DATA_INTERFACE)
1274				data_interface = usb_ifnum_to_if(usb_dev, 0);
1275			else
1276				data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1277			control_interface = intf;
1278		} else {
1279			if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1280				dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1281				return -ENODEV;
1282			} else {
1283				dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1284				combined_interfaces = 1;
1285				control_interface = data_interface = intf;
1286				goto look_for_collapsed_interface;
1287			}
1288		}
1289	} else {
 
 
 
1290		control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1291		data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
 
 
 
 
 
 
 
 
 
 
1292	}
1293
1294	if (!control_interface || !data_interface) {
1295		dev_dbg(&intf->dev, "no interfaces\n");
1296		return -ENODEV;
1297	}
1298
1299	if (data_interface_num != call_interface_num)
1300		dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1301
1302	if (control_interface == data_interface) {
1303		/* some broken devices designed for windows work this way */
1304		dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1305		combined_interfaces = 1;
1306		/* a popular other OS doesn't use it */
1307		quirks |= NO_CAP_LINE;
1308		if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1309			dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1310			return -EINVAL;
1311		}
1312look_for_collapsed_interface:
1313		for (i = 0; i < 3; i++) {
1314			struct usb_endpoint_descriptor *ep;
1315			ep = &data_interface->cur_altsetting->endpoint[i].desc;
1316
1317			if (usb_endpoint_is_int_in(ep))
1318				epctrl = ep;
1319			else if (usb_endpoint_is_bulk_out(ep))
1320				epwrite = ep;
1321			else if (usb_endpoint_is_bulk_in(ep))
1322				epread = ep;
1323			else
1324				return -EINVAL;
1325		}
1326		if (!epctrl || !epread || !epwrite)
1327			return -ENODEV;
1328		else
1329			goto made_compressed_probe;
1330	}
1331
1332skip_normal_probe:
1333
1334	/*workaround for switched interfaces */
1335	if (data_interface->cur_altsetting->desc.bInterfaceClass
1336						!= CDC_DATA_INTERFACE_TYPE) {
1337		if (control_interface->cur_altsetting->desc.bInterfaceClass
1338						== CDC_DATA_INTERFACE_TYPE) {
1339			dev_dbg(&intf->dev,
1340				"Your device has switched interfaces.\n");
1341			swap(control_interface, data_interface);
1342		} else {
1343			return -EINVAL;
1344		}
1345	}
1346
1347	/* Accept probe requests only for the control interface */
1348	if (!combined_interfaces && intf != control_interface)
1349		return -ENODEV;
1350
1351	if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1352		/* valid in this context */
1353		dev_dbg(&intf->dev, "The data interface isn't available\n");
1354		return -EBUSY;
1355	}
1356
1357
1358	if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1359	    control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1360		return -EINVAL;
1361
1362	epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1363	epread = &data_interface->cur_altsetting->endpoint[0].desc;
1364	epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1365
1366
1367	/* workaround for switched endpoints */
1368	if (!usb_endpoint_dir_in(epread)) {
1369		/* descriptors are swapped */
1370		dev_dbg(&intf->dev,
1371			"The data interface has switched endpoints\n");
1372		swap(epread, epwrite);
1373	}
1374made_compressed_probe:
1375	dev_dbg(&intf->dev, "interfaces are valid\n");
1376
1377	acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1378	if (acm == NULL)
1379		goto alloc_fail;
1380
1381	minor = acm_alloc_minor(acm);
1382	if (minor < 0) {
1383		dev_err(&intf->dev, "no more free acm devices\n");
1384		kfree(acm);
1385		return -ENODEV;
1386	}
1387
1388	ctrlsize = usb_endpoint_maxp(epctrl);
1389	readsize = usb_endpoint_maxp(epread) *
1390				(quirks == SINGLE_RX_URB ? 1 : 2);
1391	acm->combined_interfaces = combined_interfaces;
1392	acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1393	acm->control = control_interface;
1394	acm->data = data_interface;
 
 
 
 
 
 
 
 
 
1395	acm->minor = minor;
1396	acm->dev = usb_dev;
1397	acm->ctrl_caps = ac_management_function;
 
1398	if (quirks & NO_CAP_LINE)
1399		acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1400	acm->ctrlsize = ctrlsize;
1401	acm->readsize = readsize;
1402	acm->rx_buflimit = num_rx_buf;
1403	INIT_WORK(&acm->work, acm_softint);
1404	init_waitqueue_head(&acm->wioctl);
1405	spin_lock_init(&acm->write_lock);
1406	spin_lock_init(&acm->read_lock);
1407	mutex_init(&acm->mutex);
1408	acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1409	acm->is_int_ep = usb_endpoint_xfer_int(epread);
1410	if (acm->is_int_ep)
1411		acm->bInterval = epread->bInterval;
1412	tty_port_init(&acm->port);
1413	acm->port.ops = &acm_port_ops;
 
 
 
 
 
 
1414	init_usb_anchor(&acm->delayed);
1415	acm->quirks = quirks;
1416
1417	buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1418	if (!buf)
1419		goto alloc_fail2;
1420	acm->ctrl_buffer = buf;
1421
1422	if (acm_write_buffers_alloc(acm) < 0)
1423		goto alloc_fail4;
1424
1425	acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1426	if (!acm->ctrlurb)
1427		goto alloc_fail5;
1428
1429	for (i = 0; i < num_rx_buf; i++) {
1430		struct acm_rb *rb = &(acm->read_buffers[i]);
1431		struct urb *urb;
1432
1433		rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1434								&rb->dma);
1435		if (!rb->base)
1436			goto alloc_fail6;
1437		rb->index = i;
1438		rb->instance = acm;
1439
1440		urb = usb_alloc_urb(0, GFP_KERNEL);
1441		if (!urb)
1442			goto alloc_fail6;
1443
1444		urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1445		urb->transfer_dma = rb->dma;
1446		if (acm->is_int_ep) {
1447			usb_fill_int_urb(urb, acm->dev,
1448					 acm->rx_endpoint,
1449					 rb->base,
1450					 acm->readsize,
1451					 acm_read_bulk_callback, rb,
1452					 acm->bInterval);
1453		} else {
1454			usb_fill_bulk_urb(urb, acm->dev,
1455					  acm->rx_endpoint,
1456					  rb->base,
1457					  acm->readsize,
1458					  acm_read_bulk_callback, rb);
1459		}
1460
1461		acm->read_urbs[i] = urb;
1462		__set_bit(i, &acm->read_urbs_free);
1463	}
1464	for (i = 0; i < ACM_NW; i++) {
1465		struct acm_wb *snd = &(acm->wb[i]);
1466
1467		snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1468		if (snd->urb == NULL)
1469			goto alloc_fail7;
1470
1471		if (usb_endpoint_xfer_int(epwrite))
1472			usb_fill_int_urb(snd->urb, usb_dev,
1473				usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1474				NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1475		else
1476			usb_fill_bulk_urb(snd->urb, usb_dev,
1477				usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1478				NULL, acm->writesize, acm_write_bulk, snd);
1479		snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1480		if (quirks & SEND_ZERO_PACKET)
1481			snd->urb->transfer_flags |= URB_ZERO_PACKET;
1482		snd->instance = acm;
1483	}
1484
1485	usb_set_intfdata(intf, acm);
1486
1487	i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1488	if (i < 0)
1489		goto alloc_fail7;
 
 
 
 
1490
1491	if (cfd) { /* export the country data */
1492		acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1493		if (!acm->country_codes)
1494			goto skip_countries;
1495		acm->country_code_size = cfd->bLength - 4;
1496		memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1497							cfd->bLength - 4);
1498		acm->country_rel_date = cfd->iCountryCodeRelDate;
1499
1500		i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1501		if (i < 0) {
1502			kfree(acm->country_codes);
1503			acm->country_codes = NULL;
1504			acm->country_code_size = 0;
1505			goto skip_countries;
1506		}
1507
1508		i = device_create_file(&intf->dev,
1509						&dev_attr_iCountryCodeRelDate);
1510		if (i < 0) {
1511			device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1512			kfree(acm->country_codes);
1513			acm->country_codes = NULL;
1514			acm->country_code_size = 0;
1515			goto skip_countries;
1516		}
1517	}
1518
1519skip_countries:
1520	usb_fill_int_urb(acm->ctrlurb, usb_dev,
1521			 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1522			 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1523			 /* works around buggy devices */
1524			 epctrl->bInterval ? epctrl->bInterval : 16);
1525	acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1526	acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1527
1528	dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
 
1529
1530	acm->line.dwDTERate = cpu_to_le32(9600);
1531	acm->line.bDataBits = 8;
1532	acm_set_line(acm, &acm->line);
1533
1534	usb_driver_claim_interface(&acm_driver, data_interface, acm);
1535	usb_set_intfdata(data_interface, acm);
 
 
 
1536
1537	usb_get_intf(control_interface);
1538	tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1539			&control_interface->dev);
1540	if (IS_ERR(tty_dev)) {
1541		rv = PTR_ERR(tty_dev);
1542		goto alloc_fail8;
1543	}
1544
1545	if (quirks & CLEAR_HALT_CONDITIONS) {
1546		usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
1547		usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
1548	}
1549
 
 
1550	return 0;
1551alloc_fail8:
 
 
 
 
 
 
 
1552	if (acm->country_codes) {
1553		device_remove_file(&acm->control->dev,
1554				&dev_attr_wCountryCodes);
1555		device_remove_file(&acm->control->dev,
1556				&dev_attr_iCountryCodeRelDate);
1557		kfree(acm->country_codes);
1558	}
1559	device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1560alloc_fail7:
1561	usb_set_intfdata(intf, NULL);
1562	for (i = 0; i < ACM_NW; i++)
1563		usb_free_urb(acm->wb[i].urb);
1564alloc_fail6:
1565	for (i = 0; i < num_rx_buf; i++)
1566		usb_free_urb(acm->read_urbs[i]);
1567	acm_read_buffers_free(acm);
1568	usb_free_urb(acm->ctrlurb);
1569alloc_fail5:
1570	acm_write_buffers_free(acm);
1571alloc_fail4:
1572	usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1573alloc_fail2:
1574	acm_release_minor(acm);
1575	kfree(acm);
1576alloc_fail:
1577	return rv;
1578}
1579
1580static void stop_data_traffic(struct acm *acm)
1581{
1582	int i;
1583
1584	dev_dbg(&acm->control->dev, "%s\n", __func__);
1585
1586	usb_kill_urb(acm->ctrlurb);
1587	for (i = 0; i < ACM_NW; i++)
1588		usb_kill_urb(acm->wb[i].urb);
1589	for (i = 0; i < acm->rx_buflimit; i++)
1590		usb_kill_urb(acm->read_urbs[i]);
1591
1592	cancel_work_sync(&acm->work);
1593}
1594
1595static void acm_disconnect(struct usb_interface *intf)
1596{
1597	struct acm *acm = usb_get_intfdata(intf);
1598	struct usb_device *usb_dev = interface_to_usbdev(intf);
1599	struct tty_struct *tty;
1600	int i;
1601
1602	dev_dbg(&intf->dev, "%s\n", __func__);
1603
1604	/* sibling interface is already cleaning up */
1605	if (!acm)
1606		return;
1607
1608	mutex_lock(&acm->mutex);
1609	acm->disconnected = true;
 
 
 
 
 
 
 
1610	if (acm->country_codes) {
1611		device_remove_file(&acm->control->dev,
1612				&dev_attr_wCountryCodes);
1613		device_remove_file(&acm->control->dev,
1614				&dev_attr_iCountryCodeRelDate);
1615	}
1616	wake_up_all(&acm->wioctl);
1617	device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1618	usb_set_intfdata(acm->control, NULL);
1619	usb_set_intfdata(acm->data, NULL);
1620	mutex_unlock(&acm->mutex);
1621
1622	tty = tty_port_tty_get(&acm->port);
1623	if (tty) {
1624		tty_vhangup(tty);
1625		tty_kref_put(tty);
1626	}
1627
1628	stop_data_traffic(acm);
1629
1630	tty_unregister_device(acm_tty_driver, acm->minor);
1631
1632	usb_free_urb(acm->ctrlurb);
1633	for (i = 0; i < ACM_NW; i++)
1634		usb_free_urb(acm->wb[i].urb);
1635	for (i = 0; i < acm->rx_buflimit; i++)
1636		usb_free_urb(acm->read_urbs[i]);
1637	acm_write_buffers_free(acm);
1638	usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1639	acm_read_buffers_free(acm);
1640
 
 
1641	if (!acm->combined_interfaces)
1642		usb_driver_release_interface(&acm_driver, intf == acm->control ?
1643					acm->data : acm->control);
1644
1645	tty_port_put(&acm->port);
1646}
1647
1648#ifdef CONFIG_PM
1649static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1650{
1651	struct acm *acm = usb_get_intfdata(intf);
1652	int cnt;
1653
1654	spin_lock_irq(&acm->write_lock);
1655	if (PMSG_IS_AUTO(message)) {
1656		if (acm->transmitting) {
1657			spin_unlock_irq(&acm->write_lock);
1658			return -EBUSY;
1659		}
1660	}
1661	cnt = acm->susp_count++;
1662	spin_unlock_irq(&acm->write_lock);
1663
1664	if (cnt)
1665		return 0;
1666
1667	stop_data_traffic(acm);
 
 
1668
1669	return 0;
1670}
1671
1672static int acm_resume(struct usb_interface *intf)
1673{
1674	struct acm *acm = usb_get_intfdata(intf);
1675	struct urb *urb;
1676	int rv = 0;
1677
1678	spin_lock_irq(&acm->write_lock);
1679
1680	if (--acm->susp_count)
1681		goto out;
1682
1683	if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
 
 
1684		rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1685
1686		for (;;) {
1687			urb = usb_get_from_anchor(&acm->delayed);
1688			if (!urb)
1689				break;
1690
1691			acm_start_wb(acm, urb->context);
1692		}
1693
1694		/*
1695		 * delayed error checking because we must
1696		 * do the write path at all cost
1697		 */
1698		if (rv < 0)
1699			goto out;
1700
1701		rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1702	}
1703out:
1704	spin_unlock_irq(&acm->write_lock);
1705
1706	return rv;
1707}
1708
1709static int acm_reset_resume(struct usb_interface *intf)
1710{
1711	struct acm *acm = usb_get_intfdata(intf);
1712
1713	if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1714		tty_port_tty_hangup(&acm->port, false);
1715
1716	return acm_resume(intf);
1717}
1718
1719#endif /* CONFIG_PM */
1720
 
 
 
 
 
 
 
 
 
 
1721#define NOKIA_PCSUITE_ACM_INFO(x) \
1722		USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1723		USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1724		USB_CDC_ACM_PROTO_VENDOR)
1725
1726#define SAMSUNG_PCSUITE_ACM_INFO(x) \
1727		USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1728		USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1729		USB_CDC_ACM_PROTO_VENDOR)
1730
1731/*
1732 * USB driver structure.
1733 */
1734
1735static const struct usb_device_id acm_ids[] = {
1736	/* quirky and broken devices */
 
 
1737	{ USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */
1738	.driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1739	{ USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1740	.driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1741	{ USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1742	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1743	},
 
 
 
 
 
 
 
 
 
1744	{ USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1745	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1746	},
 
 
 
1747	{ USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1748	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1749	},
1750	{ USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1751	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1752	},
1753	{ USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1754	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1755	},
1756	{ USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1757	.driver_info = SINGLE_RX_URB,
1758	},
1759	{ USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1760	.driver_info = SINGLE_RX_URB, /* firmware bug */
1761	},
1762	{ USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1763	.driver_info = SINGLE_RX_URB, /* firmware bug */
1764	},
 
 
 
 
 
 
1765	{ USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1766	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1767	},
1768	{ USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1769	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1770	},
1771	{ USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1772	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1773	},
1774	{ USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1775	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1776	},
1777	{ USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1778	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1779	},
 
 
 
1780	{ USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */
1781	.driver_info = QUIRK_CONTROL_LINE_STATE, },
1782	{ USB_DEVICE(0x2184, 0x001c) },	/* GW Instek AFG-2225 */
 
1783	{ USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1784	},
1785	/* Motorola H24 HSPA module: */
1786	{ USB_DEVICE(0x22b8, 0x2d91) }, /* modem                                */
1787	{ USB_DEVICE(0x22b8, 0x2d92),   /* modem           + diagnostics        */
1788	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1789	},
1790	{ USB_DEVICE(0x22b8, 0x2d93),   /* modem + AT port                      */
1791	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1792	},
1793	{ USB_DEVICE(0x22b8, 0x2d95),   /* modem + AT port + diagnostics        */
1794	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1795	},
1796	{ USB_DEVICE(0x22b8, 0x2d96),   /* modem                         + NMEA */
1797	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1798	},
1799	{ USB_DEVICE(0x22b8, 0x2d97),   /* modem           + diagnostics + NMEA */
1800	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1801	},
1802	{ USB_DEVICE(0x22b8, 0x2d99),   /* modem + AT port               + NMEA */
1803	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1804	},
1805	{ USB_DEVICE(0x22b8, 0x2d9a),   /* modem + AT port + diagnostics + NMEA */
1806	.driver_info = NO_UNION_NORMAL, /* handle only modem interface          */
1807	},
1808
1809	{ USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1810	.driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1811					   data interface instead of
1812					   communications interface.
1813					   Maybe we should define a new
1814					   quirk for this. */
1815	},
1816	{ USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1817	.driver_info = NO_UNION_NORMAL,
1818	},
1819	{ USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1820	.driver_info = NO_UNION_NORMAL,
1821	},
1822	{ USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1823	.driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1824	},
1825	{ USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1826	.driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1827	},
 
 
 
 
 
 
 
 
 
 
 
 
1828
1829	{ USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
1830	.driver_info = CLEAR_HALT_CONDITIONS,
1831	},
1832
1833	/* Nokia S60 phones expose two ACM channels. The first is
1834	 * a modem and is picked up by the standard AT-command
1835	 * information below. The second is 'vendor-specific' but
1836	 * is treated as a serial device at the S60 end, so we want
1837	 * to expose it on Linux too. */
1838	{ NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1839	{ NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1840	{ NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1841	{ NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1842	{ NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1843	{ NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1844	{ NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1845	{ NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1846	{ NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1847	{ NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1848	{ NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1849	{ NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1850	{ NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1851	{ NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1852	{ NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1853	{ NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1854	{ NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1855	{ NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i  */
1856	{ NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1857	{ NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1858	{ NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1859	{ NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic &  */
1860	{ NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1861	{ NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1862	{ NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1863	{ NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1864	{ NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1865	{ NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1866	{ NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1867	{ NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1868	{ NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1869	{ NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB  */
1870	{ NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1871	{ NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1872	{ NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1873	{ NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1874	{ NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1875	{ NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1876	{ NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1877	{ NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3  */
1878	{ NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1879	{ NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1880	{ NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1881	{ NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1882	{ NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1883	{ NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1884	{ NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1885	{ NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1886	{ NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1887	{ NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1888	{ NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1889	{ NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1890	{ NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1891	{ NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1892	{ NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1893	{ NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1894	{ NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1895	{ SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1896
1897	/* Support for Owen devices */
1898	{ USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1899
1900	/* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1901
1902	/* Support for Droids MuIn LCD */
1903	{ USB_DEVICE(0x04d8, 0x000b),
1904	.driver_info = NO_DATA_INTERFACE,
1905	},
1906
1907#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
1908	{ USB_DEVICE(0x04d8, 0x0082),	/* Application mode */
1909	.driver_info = IGNORE_DEVICE,
1910	},
1911	{ USB_DEVICE(0x04d8, 0x0083),	/* Bootloader mode */
1912	.driver_info = IGNORE_DEVICE,
1913	},
1914#endif
1915
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1916	/*Samsung phone in firmware update mode */
1917	{ USB_DEVICE(0x04e8, 0x685d),
1918	.driver_info = IGNORE_DEVICE,
1919	},
1920
1921	/* Exclude Infineon Flash Loader utility */
1922	{ USB_DEVICE(0x058b, 0x0041),
1923	.driver_info = IGNORE_DEVICE,
1924	},
1925
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1926	/* control interfaces without any protocol set */
1927	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1928		USB_CDC_PROTO_NONE) },
1929
1930	/* control interfaces with various AT-command sets */
1931	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1932		USB_CDC_ACM_PROTO_AT_V25TER) },
1933	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1934		USB_CDC_ACM_PROTO_AT_PCCA101) },
1935	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1936		USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1937	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1938		USB_CDC_ACM_PROTO_AT_GSM) },
1939	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1940		USB_CDC_ACM_PROTO_AT_3G) },
1941	{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1942		USB_CDC_ACM_PROTO_AT_CDMA) },
1943
1944	{ USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */
1945	.driver_info = SEND_ZERO_PACKET,
1946	},
1947
1948	{ }
1949};
1950
1951MODULE_DEVICE_TABLE(usb, acm_ids);
1952
1953static struct usb_driver acm_driver = {
1954	.name =		"cdc_acm",
1955	.probe =	acm_probe,
1956	.disconnect =	acm_disconnect,
1957#ifdef CONFIG_PM
1958	.suspend =	acm_suspend,
1959	.resume =	acm_resume,
1960	.reset_resume =	acm_reset_resume,
1961#endif
 
1962	.id_table =	acm_ids,
1963#ifdef CONFIG_PM
1964	.supports_autosuspend = 1,
1965#endif
1966	.disable_hub_initiated_lpm = 1,
1967};
1968
1969/*
1970 * TTY driver structures.
1971 */
1972
1973static const struct tty_operations acm_ops = {
1974	.install =		acm_tty_install,
1975	.open =			acm_tty_open,
1976	.close =		acm_tty_close,
1977	.cleanup =		acm_tty_cleanup,
1978	.hangup =		acm_tty_hangup,
1979	.write =		acm_tty_write,
1980	.put_char =		acm_tty_put_char,
1981	.flush_chars =		acm_tty_flush_chars,
1982	.write_room =		acm_tty_write_room,
1983	.ioctl =		acm_tty_ioctl,
1984	.throttle =		acm_tty_throttle,
1985	.unthrottle =		acm_tty_unthrottle,
1986	.chars_in_buffer =	acm_tty_chars_in_buffer,
1987	.break_ctl =		acm_tty_break_ctl,
1988	.set_termios =		acm_tty_set_termios,
1989	.tiocmget =		acm_tty_tiocmget,
1990	.tiocmset =		acm_tty_tiocmset,
 
 
 
1991};
1992
1993/*
1994 * Init / exit.
1995 */
1996
1997static int __init acm_init(void)
1998{
1999	int retval;
2000	acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
2001	if (!acm_tty_driver)
2002		return -ENOMEM;
 
2003	acm_tty_driver->driver_name = "acm",
2004	acm_tty_driver->name = "ttyACM",
2005	acm_tty_driver->major = ACM_TTY_MAJOR,
2006	acm_tty_driver->minor_start = 0,
2007	acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
2008	acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
2009	acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
2010	acm_tty_driver->init_termios = tty_std_termios;
2011	acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
2012								HUPCL | CLOCAL;
2013	tty_set_operations(acm_tty_driver, &acm_ops);
2014
2015	retval = tty_register_driver(acm_tty_driver);
2016	if (retval) {
2017		put_tty_driver(acm_tty_driver);
2018		return retval;
2019	}
2020
2021	retval = usb_register(&acm_driver);
2022	if (retval) {
2023		tty_unregister_driver(acm_tty_driver);
2024		put_tty_driver(acm_tty_driver);
2025		return retval;
2026	}
2027
2028	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
2029
2030	return 0;
2031}
2032
2033static void __exit acm_exit(void)
2034{
2035	usb_deregister(&acm_driver);
2036	tty_unregister_driver(acm_tty_driver);
2037	put_tty_driver(acm_tty_driver);
2038	idr_destroy(&acm_minors);
2039}
2040
2041module_init(acm_init);
2042module_exit(acm_exit);
2043
2044MODULE_AUTHOR(DRIVER_AUTHOR);
2045MODULE_DESCRIPTION(DRIVER_DESC);
2046MODULE_LICENSE("GPL");
2047MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);