Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * cdc-acm.c |
| 3 | * |
| 4 | * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> |
| 5 | * Copyright (c) 1999 Pavel Machek <pavel@suse.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> |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 9 | * Copyright (c) 2005 David Kubicek <dave@awk.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * |
| 11 | * USB Abstract Control Model driver for USB modems and ISDN adapters |
| 12 | * |
| 13 | * Sponsored by SuSE |
| 14 | * |
| 15 | * ChangeLog: |
| 16 | * v0.9 - thorough cleaning, URBification, almost a rewrite |
| 17 | * v0.10 - some more cleanups |
| 18 | * v0.11 - fixed flow control, read error doesn't stop reads |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 19 | * v0.12 - added TIOCM ioctls, added break handling, made struct acm |
| 20 | * kmalloced |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | * v0.13 - added termios, added hangup |
| 22 | * v0.14 - sized down struct acm |
| 23 | * v0.15 - fixed flow control again - characters could be lost |
| 24 | * v0.16 - added code for modems with swapped data and control interfaces |
| 25 | * v0.17 - added new style probing |
| 26 | * v0.18 - fixed new style probing for devices with more configurations |
| 27 | * v0.19 - fixed CLOCAL handling (thanks to Richard Shih-Ping Chan) |
| 28 | * v0.20 - switched to probing on interface (rather than device) class |
| 29 | * v0.21 - revert to probing on device for devices with multiple configs |
| 30 | * v0.22 - probe only the control interface. if usbcore doesn't choose the |
| 31 | * config we want, sysadmin changes bConfigurationValue in sysfs. |
| 32 | * v0.23 - use softirq for rx processing, as needed by tty layer |
| 33 | * v0.24 - change probe method to evaluate CDC union descriptor |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 34 | * v0.25 - downstream tasks paralelized to maximize throughput |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 35 | * v0.26 - multiple write urbs, writesize increased |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | */ |
| 37 | |
| 38 | /* |
| 39 | * This program is free software; you can redistribute it and/or modify |
| 40 | * it under the terms of the GNU General Public License as published by |
| 41 | * the Free Software Foundation; either version 2 of the License, or |
| 42 | * (at your option) any later version. |
| 43 | * |
| 44 | * This program is distributed in the hope that it will be useful, |
| 45 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 46 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 47 | * GNU General Public License for more details. |
| 48 | * |
| 49 | * You should have received a copy of the GNU General Public License |
| 50 | * along with this program; if not, write to the Free Software |
| 51 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 52 | */ |
| 53 | |
| 54 | #undef DEBUG |
David Brownell | e5fbab5 | 2008-08-06 18:46:10 -0700 | [diff] [blame] | 55 | #undef VERBOSE_DEBUG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | #include <linux/kernel.h> |
| 58 | #include <linux/errno.h> |
| 59 | #include <linux/init.h> |
| 60 | #include <linux/slab.h> |
| 61 | #include <linux/tty.h> |
| 62 | #include <linux/tty_driver.h> |
| 63 | #include <linux/tty_flip.h> |
| 64 | #include <linux/module.h> |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 65 | #include <linux/mutex.h> |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 66 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #include <linux/usb.h> |
David Brownell | a8c28f2 | 2006-06-13 09:57:47 -0700 | [diff] [blame] | 68 | #include <linux/usb/cdc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #include <asm/byteorder.h> |
| 70 | #include <asm/unaligned.h> |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 71 | #include <linux/list.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | #include "cdc-acm.h" |
| 74 | |
David Brownell | e5fbab5 | 2008-08-06 18:46:10 -0700 | [diff] [blame] | 75 | |
| 76 | #define ACM_CLOSE_TIMEOUT 15 /* seconds to let writes drain */ |
| 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | /* |
| 79 | * Version Information |
| 80 | */ |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 81 | #define DRIVER_VERSION "v0.26" |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 82 | #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" |
| 84 | |
| 85 | static struct usb_driver acm_driver; |
| 86 | static struct tty_driver *acm_tty_driver; |
| 87 | static struct acm *acm_table[ACM_TTY_MINORS]; |
| 88 | |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 89 | static DEFINE_MUTEX(open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 91 | #define ACM_READY(acm) (acm && acm->dev && acm->port.count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
Alan Cox | 739e028 | 2009-06-11 12:27:50 +0100 | [diff] [blame] | 93 | static const struct tty_port_operations acm_port_ops = { |
| 94 | }; |
| 95 | |
David Brownell | e5fbab5 | 2008-08-06 18:46:10 -0700 | [diff] [blame] | 96 | #ifdef VERBOSE_DEBUG |
| 97 | #define verbose 1 |
| 98 | #else |
| 99 | #define verbose 0 |
| 100 | #endif |
| 101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | /* |
| 103 | * Functions for ACM control messages. |
| 104 | */ |
| 105 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 106 | static int acm_ctrl_msg(struct acm *acm, int request, int value, |
| 107 | void *buf, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | { |
| 109 | int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), |
| 110 | request, USB_RT_ACM, value, |
| 111 | acm->control->altsetting[0].desc.bInterfaceNumber, |
| 112 | buf, len, 5000); |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 113 | dbg("acm_control_msg: rq: 0x%02x val: %#x len: %#x result: %d", |
| 114 | request, value, len, retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | return retval < 0 ? retval : 0; |
| 116 | } |
| 117 | |
| 118 | /* devices aren't required to support these requests. |
| 119 | * the cdc acm descriptor tells whether they do... |
| 120 | */ |
| 121 | #define acm_set_control(acm, control) \ |
| 122 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0) |
| 123 | #define acm_set_line(acm, line) \ |
| 124 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) |
| 125 | #define acm_send_break(acm, ms) \ |
| 126 | acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) |
| 127 | |
| 128 | /* |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 129 | * Write buffer management. |
| 130 | * All of these assume proper locks taken by the caller. |
| 131 | */ |
| 132 | |
| 133 | static int acm_wb_alloc(struct acm *acm) |
| 134 | { |
| 135 | int i, wbn; |
| 136 | struct acm_wb *wb; |
| 137 | |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 138 | wbn = 0; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 139 | i = 0; |
| 140 | for (;;) { |
| 141 | wb = &acm->wb[wbn]; |
| 142 | if (!wb->use) { |
| 143 | wb->use = 1; |
| 144 | return wbn; |
| 145 | } |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 146 | wbn = (wbn + 1) % ACM_NW; |
| 147 | if (++i >= ACM_NW) |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 148 | return -1; |
| 149 | } |
| 150 | } |
| 151 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 152 | static int acm_wb_is_avail(struct acm *acm) |
| 153 | { |
| 154 | int i, n; |
David Brownell | e5fbab5 | 2008-08-06 18:46:10 -0700 | [diff] [blame] | 155 | unsigned long flags; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 156 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 157 | n = ACM_NW; |
David Brownell | e5fbab5 | 2008-08-06 18:46:10 -0700 | [diff] [blame] | 158 | spin_lock_irqsave(&acm->write_lock, flags); |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 159 | for (i = 0; i < ACM_NW; i++) |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 160 | n -= acm->wb[i].use; |
David Brownell | e5fbab5 | 2008-08-06 18:46:10 -0700 | [diff] [blame] | 161 | spin_unlock_irqrestore(&acm->write_lock, flags); |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 162 | return n; |
| 163 | } |
| 164 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 165 | /* |
Brandon Philips | ad0b65e | 2008-11-06 11:19:11 -0800 | [diff] [blame] | 166 | * Finish write. Caller must hold acm->write_lock |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 167 | */ |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 168 | static void acm_write_done(struct acm *acm, struct acm_wb *wb) |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 169 | { |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 170 | wb->use = 0; |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 171 | acm->transmitting--; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 172 | } |
| 173 | |
| 174 | /* |
| 175 | * Poke write. |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 176 | * |
| 177 | * the caller is responsible for locking |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 178 | */ |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 179 | |
| 180 | static int acm_start_wb(struct acm *acm, struct acm_wb *wb) |
| 181 | { |
| 182 | int rc; |
| 183 | |
| 184 | acm->transmitting++; |
| 185 | |
| 186 | wb->urb->transfer_buffer = wb->buf; |
| 187 | wb->urb->transfer_dma = wb->dmah; |
| 188 | wb->urb->transfer_buffer_length = wb->len; |
| 189 | wb->urb->dev = acm->dev; |
| 190 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 191 | rc = usb_submit_urb(wb->urb, GFP_ATOMIC); |
| 192 | if (rc < 0) { |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 193 | dbg("usb_submit_urb(write bulk) failed: %d", rc); |
| 194 | acm_write_done(acm, wb); |
| 195 | } |
| 196 | return rc; |
| 197 | } |
| 198 | |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 199 | static int acm_write_start(struct acm *acm, int wbn) |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 200 | { |
| 201 | unsigned long flags; |
David Brownell | 934da46 | 2008-08-06 18:44:12 -0700 | [diff] [blame] | 202 | struct acm_wb *wb = &acm->wb[wbn]; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 203 | int rc; |
| 204 | |
| 205 | spin_lock_irqsave(&acm->write_lock, flags); |
| 206 | if (!acm->dev) { |
David Brownell | 934da46 | 2008-08-06 18:44:12 -0700 | [diff] [blame] | 207 | wb->use = 0; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 208 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 209 | return -ENODEV; |
| 210 | } |
| 211 | |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 212 | dbg("%s susp_count: %d", __func__, acm->susp_count); |
| 213 | if (acm->susp_count) { |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 214 | acm->delayed_wb = wb; |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 215 | schedule_work(&acm->waker); |
| 216 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 217 | return 0; /* A white lie */ |
| 218 | } |
| 219 | usb_mark_last_busy(acm->dev); |
| 220 | |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 221 | rc = acm_start_wb(acm, wb); |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 222 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 223 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 224 | return rc; |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 225 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 226 | } |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 227 | /* |
| 228 | * attributes exported through sysfs |
| 229 | */ |
| 230 | static ssize_t show_caps |
| 231 | (struct device *dev, struct device_attribute *attr, char *buf) |
| 232 | { |
| 233 | struct usb_interface *intf = to_usb_interface(dev); |
| 234 | struct acm *acm = usb_get_intfdata(intf); |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 235 | |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 236 | return sprintf(buf, "%d", acm->ctrl_caps); |
| 237 | } |
| 238 | static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); |
| 239 | |
| 240 | static ssize_t show_country_codes |
| 241 | (struct device *dev, struct device_attribute *attr, char *buf) |
| 242 | { |
| 243 | struct usb_interface *intf = to_usb_interface(dev); |
| 244 | struct acm *acm = usb_get_intfdata(intf); |
| 245 | |
| 246 | memcpy(buf, acm->country_codes, acm->country_code_size); |
| 247 | return acm->country_code_size; |
| 248 | } |
| 249 | |
| 250 | static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); |
| 251 | |
| 252 | static ssize_t show_country_rel_date |
| 253 | (struct device *dev, struct device_attribute *attr, char *buf) |
| 254 | { |
| 255 | struct usb_interface *intf = to_usb_interface(dev); |
| 256 | struct acm *acm = usb_get_intfdata(intf); |
| 257 | |
| 258 | return sprintf(buf, "%d", acm->country_rel_date); |
| 259 | } |
| 260 | |
| 261 | static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 262 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | * Interrupt handlers for various ACM device responses |
| 264 | */ |
| 265 | |
| 266 | /* control interface reports status changes with "interrupt" transfers */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 267 | static void acm_ctrl_irq(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | { |
| 269 | struct acm *acm = urb->context; |
| 270 | struct usb_cdc_notification *dr = urb->transfer_buffer; |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 271 | struct tty_struct *tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | unsigned char *data; |
| 273 | int newctrl; |
Greg Kroah-Hartman | 185d405 | 2007-07-18 10:58:02 -0700 | [diff] [blame] | 274 | int retval; |
| 275 | int status = urb->status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
Greg Kroah-Hartman | 185d405 | 2007-07-18 10:58:02 -0700 | [diff] [blame] | 277 | switch (status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | case 0: |
| 279 | /* success */ |
| 280 | break; |
| 281 | case -ECONNRESET: |
| 282 | case -ENOENT: |
| 283 | case -ESHUTDOWN: |
| 284 | /* this urb is terminated, clean up */ |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 285 | dbg("%s - urb shutting down with status: %d", __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | return; |
| 287 | default: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 288 | dbg("%s - nonzero urb status received: %d", __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | goto exit; |
| 290 | } |
| 291 | |
| 292 | if (!ACM_READY(acm)) |
| 293 | goto exit; |
| 294 | |
| 295 | data = (unsigned char *)(dr + 1); |
| 296 | switch (dr->bNotificationType) { |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 297 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: |
| 298 | dbg("%s network", dr->wValue ? |
| 299 | "connected to" : "disconnected from"); |
| 300 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 302 | case USB_CDC_NOTIFY_SERIAL_STATE: |
| 303 | tty = tty_port_tty_get(&acm->port); |
| 304 | newctrl = get_unaligned_le16(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 306 | if (tty) { |
| 307 | if (!acm->clocal && |
| 308 | (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { |
| 309 | dbg("calling hangup"); |
| 310 | tty_hangup(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | } |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 312 | tty_kref_put(tty); |
| 313 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 315 | acm->ctrlin = newctrl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 317 | dbg("input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c", |
| 318 | acm->ctrlin & ACM_CTRL_DCD ? '+' : '-', |
| 319 | acm->ctrlin & ACM_CTRL_DSR ? '+' : '-', |
| 320 | acm->ctrlin & ACM_CTRL_BRK ? '+' : '-', |
| 321 | acm->ctrlin & ACM_CTRL_RI ? '+' : '-', |
| 322 | acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-', |
| 323 | acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-', |
| 324 | acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-'); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | break; |
| 326 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 327 | default: |
| 328 | dbg("unknown notification %d received: index %d len %d data0 %d data1 %d", |
| 329 | dr->bNotificationType, dr->wIndex, |
| 330 | dr->wLength, data[0], data[1]); |
| 331 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | } |
| 333 | exit: |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 334 | usb_mark_last_busy(acm->dev); |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 335 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
Greg Kroah-Hartman | 185d405 | 2007-07-18 10:58:02 -0700 | [diff] [blame] | 336 | if (retval) |
Greg Kroah-Hartman | 9908a32 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 337 | dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with " |
| 338 | "result %d", __func__, retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | } |
| 340 | |
| 341 | /* data interface returns incoming bytes, or we got unthrottled */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 342 | static void acm_read_bulk(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | { |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 344 | struct acm_rb *buf; |
| 345 | struct acm_ru *rcv = urb->context; |
| 346 | struct acm *acm = rcv->instance; |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 347 | int status = urb->status; |
Greg Kroah-Hartman | 185d405 | 2007-07-18 10:58:02 -0700 | [diff] [blame] | 348 | |
| 349 | dbg("Entering acm_read_bulk with status %d", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 351 | if (!ACM_READY(acm)) { |
| 352 | dev_dbg(&acm->data->dev, "Aborting, acm not ready"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | return; |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 354 | } |
| 355 | usb_mark_last_busy(acm->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 357 | if (status) |
Joe Perches | 898eb71 | 2007-10-18 03:06:30 -0700 | [diff] [blame] | 358 | dev_dbg(&acm->data->dev, "bulk rx status %d\n", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 360 | buf = rcv->buffer; |
| 361 | buf->size = urb->actual_length; |
| 362 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 363 | if (likely(status == 0)) { |
| 364 | spin_lock(&acm->read_lock); |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 365 | acm->processing++; |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 366 | list_add_tail(&rcv->list, &acm->spare_read_urbs); |
| 367 | list_add_tail(&buf->list, &acm->filled_read_bufs); |
| 368 | spin_unlock(&acm->read_lock); |
| 369 | } else { |
| 370 | /* we drop the buffer due to an error */ |
| 371 | spin_lock(&acm->read_lock); |
| 372 | list_add_tail(&rcv->list, &acm->spare_read_urbs); |
| 373 | list_add(&buf->list, &acm->spare_read_bufs); |
| 374 | spin_unlock(&acm->read_lock); |
| 375 | /* nevertheless the tasklet must be kicked unconditionally |
| 376 | so the queue cannot dry up */ |
| 377 | } |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 378 | if (likely(!acm->susp_count)) |
| 379 | tasklet_schedule(&acm->urb_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | static void acm_rx_tasklet(unsigned long _acm) |
| 383 | { |
| 384 | struct acm *acm = (void *)_acm; |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 385 | struct acm_rb *buf; |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 386 | struct tty_struct *tty; |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 387 | struct acm_ru *rcv; |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 388 | unsigned long flags; |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 389 | unsigned char throttled; |
Arseniy Lartsev | 5186ffe | 2009-07-01 16:27:26 +0400 | [diff] [blame] | 390 | struct usb_host_endpoint *ep; |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 391 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | dbg("Entering acm_rx_tasklet"); |
| 393 | |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 394 | if (!ACM_READY(acm)) { |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 395 | dbg("acm_rx_tasklet: ACM not ready"); |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 396 | return; |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 397 | } |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 398 | |
Oliver Neukum | 834dbca | 2007-03-06 10:47:04 +0100 | [diff] [blame] | 399 | spin_lock_irqsave(&acm->throttle_lock, flags); |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 400 | throttled = acm->throttle; |
Oliver Neukum | 834dbca | 2007-03-06 10:47:04 +0100 | [diff] [blame] | 401 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 402 | if (throttled) { |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 403 | dbg("acm_rx_tasklet: throttled"); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 404 | return; |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 405 | } |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 406 | |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 407 | tty = tty_port_tty_get(&acm->port); |
| 408 | |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 409 | next_buffer: |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 410 | spin_lock_irqsave(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 411 | if (list_empty(&acm->filled_read_bufs)) { |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 412 | spin_unlock_irqrestore(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 413 | goto urbs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | } |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 415 | buf = list_entry(acm->filled_read_bufs.next, |
| 416 | struct acm_rb, list); |
| 417 | list_del(&buf->list); |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 418 | spin_unlock_irqrestore(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 419 | |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 420 | dbg("acm_rx_tasklet: procesing buf 0x%p, size = %d", buf, buf->size); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 421 | |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 422 | if (tty) { |
| 423 | spin_lock_irqsave(&acm->throttle_lock, flags); |
| 424 | throttled = acm->throttle; |
| 425 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
| 426 | if (!throttled) { |
| 427 | tty_buffer_request_room(tty, buf->size); |
| 428 | tty_insert_flip_string(tty, buf->base, buf->size); |
| 429 | tty_flip_buffer_push(tty); |
| 430 | } else { |
| 431 | tty_kref_put(tty); |
| 432 | dbg("Throttling noticed"); |
| 433 | spin_lock_irqsave(&acm->read_lock, flags); |
| 434 | list_add(&buf->list, &acm->filled_read_bufs); |
| 435 | spin_unlock_irqrestore(&acm->read_lock, flags); |
| 436 | return; |
| 437 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 440 | spin_lock_irqsave(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 441 | list_add(&buf->list, &acm->spare_read_bufs); |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 442 | spin_unlock_irqrestore(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 443 | goto next_buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 445 | urbs: |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 446 | tty_kref_put(tty); |
| 447 | |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 448 | while (!list_empty(&acm->spare_read_bufs)) { |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 449 | spin_lock_irqsave(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 450 | if (list_empty(&acm->spare_read_urbs)) { |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 451 | acm->processing = 0; |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 452 | spin_unlock_irqrestore(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 453 | return; |
| 454 | } |
| 455 | rcv = list_entry(acm->spare_read_urbs.next, |
| 456 | struct acm_ru, list); |
| 457 | list_del(&rcv->list); |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 458 | spin_unlock_irqrestore(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 459 | |
| 460 | buf = list_entry(acm->spare_read_bufs.next, |
| 461 | struct acm_rb, list); |
| 462 | list_del(&buf->list); |
| 463 | |
| 464 | rcv->buffer = buf; |
| 465 | |
Arseniy Lartsev | 5186ffe | 2009-07-01 16:27:26 +0400 | [diff] [blame] | 466 | ep = (usb_pipein(acm->rx_endpoint) ? acm->dev->ep_in : acm->dev->ep_out) |
| 467 | [usb_pipeendpoint(acm->rx_endpoint)]; |
| 468 | if (usb_endpoint_xfer_int(&ep->desc)) |
| 469 | usb_fill_int_urb(rcv->urb, acm->dev, |
| 470 | acm->rx_endpoint, |
| 471 | buf->base, |
| 472 | acm->readsize, |
| 473 | acm_read_bulk, rcv, ep->desc.bInterval); |
| 474 | else |
| 475 | usb_fill_bulk_urb(rcv->urb, acm->dev, |
| 476 | acm->rx_endpoint, |
| 477 | buf->base, |
| 478 | acm->readsize, |
| 479 | acm_read_bulk, rcv); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 480 | rcv->urb->transfer_dma = buf->dma; |
| 481 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 482 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 483 | /* This shouldn't kill the driver as unsuccessful URBs are |
| 484 | returned to the free-urbs-pool and resubmited ASAP */ |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 485 | spin_lock_irqsave(&acm->read_lock, flags); |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 486 | if (acm->susp_count || |
| 487 | usb_submit_urb(rcv->urb, GFP_ATOMIC) < 0) { |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 488 | list_add(&buf->list, &acm->spare_read_bufs); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 489 | list_add(&rcv->list, &acm->spare_read_urbs); |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 490 | acm->processing = 0; |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 491 | spin_unlock_irqrestore(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 492 | return; |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 493 | } else { |
| 494 | spin_unlock_irqrestore(&acm->read_lock, flags); |
| 495 | dbg("acm_rx_tasklet: sending urb 0x%p, rcv 0x%p, buf 0x%p", rcv->urb, rcv, buf); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 496 | } |
| 497 | } |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 498 | spin_lock_irqsave(&acm->read_lock, flags); |
| 499 | acm->processing = 0; |
| 500 | spin_unlock_irqrestore(&acm->read_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
| 502 | |
| 503 | /* data interface wrote those outgoing bytes */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 504 | static void acm_write_bulk(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | { |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 506 | struct acm_wb *wb = urb->context; |
David Brownell | e5fbab5 | 2008-08-06 18:46:10 -0700 | [diff] [blame] | 507 | struct acm *acm = wb->instance; |
Brandon Philips | ad0b65e | 2008-11-06 11:19:11 -0800 | [diff] [blame] | 508 | unsigned long flags; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 509 | |
David Brownell | e5fbab5 | 2008-08-06 18:46:10 -0700 | [diff] [blame] | 510 | if (verbose || urb->status |
| 511 | || (urb->actual_length != urb->transfer_buffer_length)) |
| 512 | dev_dbg(&acm->data->dev, "tx %d/%d bytes -- > %d\n", |
| 513 | urb->actual_length, |
| 514 | urb->transfer_buffer_length, |
| 515 | urb->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | |
Brandon Philips | ad0b65e | 2008-11-06 11:19:11 -0800 | [diff] [blame] | 517 | spin_lock_irqsave(&acm->write_lock, flags); |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 518 | acm_write_done(acm, wb); |
Brandon Philips | ad0b65e | 2008-11-06 11:19:11 -0800 | [diff] [blame] | 519 | spin_unlock_irqrestore(&acm->write_lock, flags); |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 520 | if (ACM_READY(acm)) |
| 521 | schedule_work(&acm->work); |
David Brownell | e5fbab5 | 2008-08-06 18:46:10 -0700 | [diff] [blame] | 522 | else |
| 523 | wake_up_interruptible(&acm->drain_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | } |
| 525 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 526 | static void acm_softint(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 528 | struct acm *acm = container_of(work, struct acm, work); |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 529 | struct tty_struct *tty; |
David Brownell | e5fbab5 | 2008-08-06 18:46:10 -0700 | [diff] [blame] | 530 | |
| 531 | dev_vdbg(&acm->data->dev, "tx work\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | if (!ACM_READY(acm)) |
| 533 | return; |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 534 | tty = tty_port_tty_get(&acm->port); |
| 535 | tty_wakeup(tty); |
| 536 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | } |
| 538 | |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 539 | static void acm_waker(struct work_struct *waker) |
| 540 | { |
| 541 | struct acm *acm = container_of(waker, struct acm, waker); |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 542 | int rv; |
| 543 | |
| 544 | rv = usb_autopm_get_interface(acm->control); |
| 545 | if (rv < 0) { |
Greg Kroah-Hartman | 9908a32 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 546 | dev_err(&acm->dev->dev, "Autopm failure in %s\n", __func__); |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 547 | return; |
| 548 | } |
| 549 | if (acm->delayed_wb) { |
| 550 | acm_start_wb(acm, acm->delayed_wb); |
| 551 | acm->delayed_wb = NULL; |
| 552 | } |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 553 | usb_autopm_put_interface(acm->control); |
| 554 | } |
| 555 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | /* |
| 557 | * TTY handlers |
| 558 | */ |
| 559 | |
| 560 | static int acm_tty_open(struct tty_struct *tty, struct file *filp) |
| 561 | { |
| 562 | struct acm *acm; |
Thadeu Lima de Souza Cascardo | 42dd2aa | 2009-06-25 14:41:24 +0100 | [diff] [blame] | 563 | int rv = -ENODEV; |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 564 | int i; |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 565 | dbg("Entering acm_tty_open."); |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 566 | |
| 567 | mutex_lock(&open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
| 569 | acm = acm_table[tty->index]; |
| 570 | if (!acm || !acm->dev) |
| 571 | goto err_out; |
| 572 | else |
| 573 | rv = 0; |
| 574 | |
David Engraf | 28d1dfa | 2008-03-20 10:53:52 +0100 | [diff] [blame] | 575 | set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 576 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | tty->driver_data = acm; |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 578 | tty_port_tty_set(&acm->port, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | |
Oliver Neukum | 94409cc | 2008-02-11 15:22:29 +0100 | [diff] [blame] | 580 | if (usb_autopm_get_interface(acm->control) < 0) |
| 581 | goto early_bail; |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 582 | else |
| 583 | acm->control->needs_remote_wakeup = 1; |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 584 | |
| 585 | mutex_lock(&acm->mutex); |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 586 | if (acm->port.count++) { |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 587 | usb_autopm_put_interface(acm->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | goto done; |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 589 | } |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 590 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | acm->ctrlurb->dev = acm->dev; |
| 592 | if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { |
| 593 | dbg("usb_submit_urb(ctrl irq) failed"); |
| 594 | goto bail_out; |
| 595 | } |
| 596 | |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 597 | if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) && |
| 598 | (acm->ctrl_caps & USB_CDC_CAP_LINE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | goto full_bailout; |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 600 | |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 601 | usb_autopm_put_interface(acm->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 603 | INIT_LIST_HEAD(&acm->spare_read_urbs); |
| 604 | INIT_LIST_HEAD(&acm->spare_read_bufs); |
| 605 | INIT_LIST_HEAD(&acm->filled_read_bufs); |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 606 | |
| 607 | for (i = 0; i < acm->rx_buflimit; i++) |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 608 | list_add(&(acm->ru[i].list), &acm->spare_read_urbs); |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 609 | for (i = 0; i < acm->rx_buflimit; i++) |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 610 | list_add(&(acm->rb[i].list), &acm->spare_read_bufs); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 611 | |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 612 | acm->throttle = 0; |
| 613 | |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 614 | tasklet_schedule(&acm->urb_task); |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 615 | rv = tty_port_block_til_ready(&acm->port, tty, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | done: |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 617 | mutex_unlock(&acm->mutex); |
Alexey Dobriyan | 74573ee | 2008-08-20 16:56:04 -0700 | [diff] [blame] | 618 | err_out: |
Oliver Neukum | 94409cc | 2008-02-11 15:22:29 +0100 | [diff] [blame] | 619 | mutex_unlock(&open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | return rv; |
| 621 | |
| 622 | full_bailout: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | usb_kill_urb(acm->ctrlurb); |
| 624 | bail_out: |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 625 | usb_autopm_put_interface(acm->control); |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 626 | acm->port.count--; |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 627 | mutex_unlock(&acm->mutex); |
Oliver Neukum | 94409cc | 2008-02-11 15:22:29 +0100 | [diff] [blame] | 628 | early_bail: |
| 629 | mutex_unlock(&open_mutex); |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 630 | tty_port_tty_set(&acm->port, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | return -EIO; |
| 632 | } |
| 633 | |
brian@murphy.dk | 83ef344 | 2005-06-29 16:53:29 -0700 | [diff] [blame] | 634 | static void acm_tty_unregister(struct acm *acm) |
| 635 | { |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 636 | int i, nr; |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 637 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 638 | nr = acm->rx_buflimit; |
brian@murphy.dk | 83ef344 | 2005-06-29 16:53:29 -0700 | [diff] [blame] | 639 | tty_unregister_device(acm_tty_driver, acm->minor); |
| 640 | usb_put_intf(acm->control); |
| 641 | acm_table[acm->minor] = NULL; |
| 642 | usb_free_urb(acm->ctrlurb); |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 643 | for (i = 0; i < ACM_NW; i++) |
| 644 | usb_free_urb(acm->wb[i].urb); |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 645 | for (i = 0; i < nr; i++) |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 646 | usb_free_urb(acm->ru[i].urb); |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 647 | kfree(acm->country_codes); |
brian@murphy.dk | 83ef344 | 2005-06-29 16:53:29 -0700 | [diff] [blame] | 648 | kfree(acm); |
| 649 | } |
| 650 | |
David Brownell | e5fbab5 | 2008-08-06 18:46:10 -0700 | [diff] [blame] | 651 | static int acm_tty_chars_in_buffer(struct tty_struct *tty); |
| 652 | |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 653 | static void acm_port_down(struct acm *acm, int drain) |
| 654 | { |
| 655 | int i, nr = acm->rx_buflimit; |
| 656 | mutex_lock(&open_mutex); |
| 657 | if (acm->dev) { |
| 658 | usb_autopm_get_interface(acm->control); |
| 659 | acm_set_control(acm, acm->ctrlout = 0); |
| 660 | /* try letting the last writes drain naturally */ |
| 661 | if (drain) { |
| 662 | wait_event_interruptible_timeout(acm->drain_wait, |
| 663 | (ACM_NW == acm_wb_is_avail(acm)) || !acm->dev, |
| 664 | ACM_CLOSE_TIMEOUT * HZ); |
| 665 | } |
| 666 | usb_kill_urb(acm->ctrlurb); |
| 667 | for (i = 0; i < ACM_NW; i++) |
| 668 | usb_kill_urb(acm->wb[i].urb); |
| 669 | for (i = 0; i < nr; i++) |
| 670 | usb_kill_urb(acm->ru[i].urb); |
| 671 | acm->control->needs_remote_wakeup = 0; |
| 672 | usb_autopm_put_interface(acm->control); |
| 673 | } |
| 674 | mutex_unlock(&open_mutex); |
| 675 | } |
| 676 | |
| 677 | static void acm_tty_hangup(struct tty_struct *tty) |
| 678 | { |
| 679 | struct acm *acm = tty->driver_data; |
| 680 | tty_port_hangup(&acm->port); |
| 681 | acm_port_down(acm, 0); |
| 682 | } |
| 683 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | static void acm_tty_close(struct tty_struct *tty, struct file *filp) |
| 685 | { |
| 686 | struct acm *acm = tty->driver_data; |
| 687 | |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 688 | /* Perform the closing process and see if we need to do the hardware |
| 689 | shutdown */ |
Thadeu Lima de Souza Cascardo | 922b135 | 2009-06-25 14:41:30 +0100 | [diff] [blame] | 690 | if (!acm || tty_port_close_start(&acm->port, tty, filp) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | return; |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 692 | acm_port_down(acm, 0); |
| 693 | tty_port_close_end(&acm->port, tty); |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 694 | mutex_lock(&open_mutex); |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 695 | tty_port_tty_set(&acm->port, NULL); |
| 696 | if (!acm->dev) |
| 697 | acm_tty_unregister(acm); |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 698 | mutex_unlock(&open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | } |
| 700 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 701 | static int acm_tty_write(struct tty_struct *tty, |
| 702 | const unsigned char *buf, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | { |
| 704 | struct acm *acm = tty->driver_data; |
| 705 | int stat; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 706 | unsigned long flags; |
| 707 | int wbn; |
| 708 | struct acm_wb *wb; |
| 709 | |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 710 | dbg("Entering acm_tty_write to write %d bytes,", count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
| 712 | if (!ACM_READY(acm)) |
| 713 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | if (!count) |
| 715 | return 0; |
| 716 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 717 | spin_lock_irqsave(&acm->write_lock, flags); |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 718 | wbn = acm_wb_alloc(acm); |
| 719 | if (wbn < 0) { |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 720 | spin_unlock_irqrestore(&acm->write_lock, flags); |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 721 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | } |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 723 | wb = &acm->wb[wbn]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 725 | count = (count > acm->writesize) ? acm->writesize : count; |
| 726 | dbg("Get %d bytes...", count); |
| 727 | memcpy(wb->buf, buf, count); |
| 728 | wb->len = count; |
| 729 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 730 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 731 | stat = acm_write_start(acm, wbn); |
| 732 | if (stat < 0) |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 733 | return stat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | return count; |
| 735 | } |
| 736 | |
| 737 | static int acm_tty_write_room(struct tty_struct *tty) |
| 738 | { |
| 739 | struct acm *acm = tty->driver_data; |
| 740 | if (!ACM_READY(acm)) |
| 741 | return -EINVAL; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 742 | /* |
| 743 | * Do not let the line discipline to know that we have a reserve, |
| 744 | * or it might get too enthusiastic. |
| 745 | */ |
David Brownell | 934da46 | 2008-08-06 18:44:12 -0700 | [diff] [blame] | 746 | return acm_wb_is_avail(acm) ? acm->writesize : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | } |
| 748 | |
| 749 | static int acm_tty_chars_in_buffer(struct tty_struct *tty) |
| 750 | { |
| 751 | struct acm *acm = tty->driver_data; |
| 752 | if (!ACM_READY(acm)) |
Alan Cox | 23198fd | 2009-07-20 16:05:27 +0100 | [diff] [blame] | 753 | return 0; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 754 | /* |
| 755 | * This is inaccurate (overcounts), but it works. |
| 756 | */ |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 757 | return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | } |
| 759 | |
| 760 | static void acm_tty_throttle(struct tty_struct *tty) |
| 761 | { |
| 762 | struct acm *acm = tty->driver_data; |
| 763 | if (!ACM_READY(acm)) |
| 764 | return; |
| 765 | spin_lock_bh(&acm->throttle_lock); |
| 766 | acm->throttle = 1; |
| 767 | spin_unlock_bh(&acm->throttle_lock); |
| 768 | } |
| 769 | |
| 770 | static void acm_tty_unthrottle(struct tty_struct *tty) |
| 771 | { |
| 772 | struct acm *acm = tty->driver_data; |
| 773 | if (!ACM_READY(acm)) |
| 774 | return; |
| 775 | spin_lock_bh(&acm->throttle_lock); |
| 776 | acm->throttle = 0; |
| 777 | spin_unlock_bh(&acm->throttle_lock); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 778 | tasklet_schedule(&acm->urb_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | } |
| 780 | |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 781 | static int acm_tty_break_ctl(struct tty_struct *tty, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | { |
| 783 | struct acm *acm = tty->driver_data; |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 784 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | if (!ACM_READY(acm)) |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 786 | return -EINVAL; |
| 787 | retval = acm_send_break(acm, state ? 0xffff : 0); |
| 788 | if (retval < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | dbg("send break failed"); |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 790 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | } |
| 792 | |
| 793 | static int acm_tty_tiocmget(struct tty_struct *tty, struct file *file) |
| 794 | { |
| 795 | struct acm *acm = tty->driver_data; |
| 796 | |
| 797 | if (!ACM_READY(acm)) |
| 798 | return -EINVAL; |
| 799 | |
| 800 | return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | |
| 801 | (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | |
| 802 | (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | |
| 803 | (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | |
| 804 | (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | |
| 805 | TIOCM_CTS; |
| 806 | } |
| 807 | |
| 808 | static int acm_tty_tiocmset(struct tty_struct *tty, struct file *file, |
| 809 | unsigned int set, unsigned int clear) |
| 810 | { |
| 811 | struct acm *acm = tty->driver_data; |
| 812 | unsigned int newctrl; |
| 813 | |
| 814 | if (!ACM_READY(acm)) |
| 815 | return -EINVAL; |
| 816 | |
| 817 | newctrl = acm->ctrlout; |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 818 | set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | |
| 819 | (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); |
| 820 | clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | |
| 821 | (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | |
| 823 | newctrl = (newctrl & ~clear) | set; |
| 824 | |
| 825 | if (acm->ctrlout == newctrl) |
| 826 | return 0; |
| 827 | return acm_set_control(acm, acm->ctrlout = newctrl); |
| 828 | } |
| 829 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 830 | static int acm_tty_ioctl(struct tty_struct *tty, struct file *file, |
| 831 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | { |
| 833 | struct acm *acm = tty->driver_data; |
| 834 | |
| 835 | if (!ACM_READY(acm)) |
| 836 | return -EINVAL; |
| 837 | |
| 838 | return -ENOIOCTLCMD; |
| 839 | } |
| 840 | |
Arjan van de Ven | 4c4c943 | 2005-11-29 09:43:42 +0100 | [diff] [blame] | 841 | static const __u32 acm_tty_speed[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | 0, 50, 75, 110, 134, 150, 200, 300, 600, |
| 843 | 1200, 1800, 2400, 4800, 9600, 19200, 38400, |
| 844 | 57600, 115200, 230400, 460800, 500000, 576000, |
| 845 | 921600, 1000000, 1152000, 1500000, 2000000, |
| 846 | 2500000, 3000000, 3500000, 4000000 |
| 847 | }; |
| 848 | |
Arjan van de Ven | 4c4c943 | 2005-11-29 09:43:42 +0100 | [diff] [blame] | 849 | static const __u8 acm_tty_size[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | 5, 6, 7, 8 |
| 851 | }; |
| 852 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 853 | static void acm_tty_set_termios(struct tty_struct *tty, |
| 854 | struct ktermios *termios_old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | { |
| 856 | struct acm *acm = tty->driver_data; |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 857 | struct ktermios *termios = tty->termios; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | struct usb_cdc_line_coding newline; |
| 859 | int newctrl = acm->ctrlout; |
| 860 | |
| 861 | if (!ACM_READY(acm)) |
| 862 | return; |
| 863 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 864 | /* FIXME: Needs to support the tty_baud interface */ |
| 865 | /* FIXME: Broken on sparc */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | newline.dwDTERate = cpu_to_le32p(acm_tty_speed + |
| 867 | (termios->c_cflag & CBAUD & ~CBAUDEX) + (termios->c_cflag & CBAUDEX ? 15 : 0)); |
| 868 | newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; |
| 869 | newline.bParityType = termios->c_cflag & PARENB ? |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 870 | (termios->c_cflag & PARODD ? 1 : 2) + |
| 871 | (termios->c_cflag & CMSPAR ? 2 : 0) : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4]; |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 873 | /* FIXME: Needs to clear unsupported bits in the termios */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | acm->clocal = ((termios->c_cflag & CLOCAL) != 0); |
| 875 | |
| 876 | if (!newline.dwDTERate) { |
| 877 | newline.dwDTERate = acm->line.dwDTERate; |
| 878 | newctrl &= ~ACM_CTRL_DTR; |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 879 | } else |
| 880 | newctrl |= ACM_CTRL_DTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | |
| 882 | if (newctrl != acm->ctrlout) |
| 883 | acm_set_control(acm, acm->ctrlout = newctrl); |
| 884 | |
| 885 | if (memcmp(&acm->line, &newline, sizeof newline)) { |
| 886 | memcpy(&acm->line, &newline, sizeof newline); |
| 887 | dbg("set line: %d %d %d %d", le32_to_cpu(newline.dwDTERate), |
| 888 | newline.bCharFormat, newline.bParityType, |
| 889 | newline.bDataBits); |
| 890 | acm_set_line(acm, &acm->line); |
| 891 | } |
| 892 | } |
| 893 | |
| 894 | /* |
| 895 | * USB probe and disconnect routines. |
| 896 | */ |
| 897 | |
Oliver Neukum | 830f402 | 2008-06-25 14:17:16 +0200 | [diff] [blame] | 898 | /* Little helpers: write/read buffers free */ |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 899 | static void acm_write_buffers_free(struct acm *acm) |
| 900 | { |
| 901 | int i; |
| 902 | struct acm_wb *wb; |
Oliver Neukum | a496c64 | 2008-10-21 10:39:04 +0200 | [diff] [blame] | 903 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 904 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 905 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) |
Oliver Neukum | a496c64 | 2008-10-21 10:39:04 +0200 | [diff] [blame] | 906 | usb_buffer_free(usb_dev, acm->writesize, wb->buf, wb->dmah); |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 907 | } |
| 908 | |
Oliver Neukum | 830f402 | 2008-06-25 14:17:16 +0200 | [diff] [blame] | 909 | static void acm_read_buffers_free(struct acm *acm) |
| 910 | { |
| 911 | struct usb_device *usb_dev = interface_to_usbdev(acm->control); |
| 912 | int i, n = acm->rx_buflimit; |
| 913 | |
| 914 | for (i = 0; i < n; i++) |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 915 | usb_buffer_free(usb_dev, acm->readsize, |
| 916 | acm->rb[i].base, acm->rb[i].dma); |
Oliver Neukum | 830f402 | 2008-06-25 14:17:16 +0200 | [diff] [blame] | 917 | } |
| 918 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 919 | /* Little helper: write buffers allocate */ |
| 920 | static int acm_write_buffers_alloc(struct acm *acm) |
| 921 | { |
| 922 | int i; |
| 923 | struct acm_wb *wb; |
| 924 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 925 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 926 | wb->buf = usb_buffer_alloc(acm->dev, acm->writesize, GFP_KERNEL, |
| 927 | &wb->dmah); |
| 928 | if (!wb->buf) { |
| 929 | while (i != 0) { |
| 930 | --i; |
| 931 | --wb; |
| 932 | usb_buffer_free(acm->dev, acm->writesize, |
| 933 | wb->buf, wb->dmah); |
| 934 | } |
| 935 | return -ENOMEM; |
| 936 | } |
| 937 | } |
| 938 | return 0; |
| 939 | } |
| 940 | |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 941 | static int acm_probe(struct usb_interface *intf, |
| 942 | const struct usb_device_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | { |
| 944 | struct usb_cdc_union_desc *union_header = NULL; |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 945 | struct usb_cdc_country_functional_desc *cfd = NULL; |
David Brownell | c6dbf55 | 2008-04-13 14:00:44 -0700 | [diff] [blame] | 946 | unsigned char *buffer = intf->altsetting->extra; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | int buflen = intf->altsetting->extralen; |
| 948 | struct usb_interface *control_interface; |
| 949 | struct usb_interface *data_interface; |
Oliver Neukum | a2bfb4a | 2009-05-16 21:13:19 +0200 | [diff] [blame] | 950 | struct usb_endpoint_descriptor *epctrl = NULL; |
| 951 | struct usb_endpoint_descriptor *epread = NULL; |
| 952 | struct usb_endpoint_descriptor *epwrite = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
| 954 | struct acm *acm; |
| 955 | int minor; |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 956 | int ctrlsize, readsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | u8 *buf; |
| 958 | u8 ac_management_function = 0; |
| 959 | u8 call_management_function = 0; |
| 960 | int call_interface_num = -1; |
| 961 | int data_interface_num; |
| 962 | unsigned long quirks; |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 963 | int num_rx_buf; |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 964 | int i; |
Oliver Neukum | a2bfb4a | 2009-05-16 21:13:19 +0200 | [diff] [blame] | 965 | int combined_interfaces = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 967 | /* normal quirks */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | quirks = (unsigned long)id->driver_info; |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 969 | num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; |
| 970 | |
| 971 | /* handle quirks deadly to normal probing*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | if (quirks == NO_UNION_NORMAL) { |
| 973 | data_interface = usb_ifnum_to_if(usb_dev, 1); |
| 974 | control_interface = usb_ifnum_to_if(usb_dev, 0); |
| 975 | goto skip_normal_probe; |
| 976 | } |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 977 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | /* normal probing*/ |
| 979 | if (!buffer) { |
Greg Kroah-Hartman | 9908a32 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 980 | dev_err(&intf->dev, "Weird descriptor references\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | return -EINVAL; |
| 982 | } |
| 983 | |
| 984 | if (!buflen) { |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 985 | if (intf->cur_altsetting->endpoint->extralen && |
| 986 | intf->cur_altsetting->endpoint->extra) { |
| 987 | dev_dbg(&intf->dev, |
| 988 | "Seeking extra descriptors on endpoint\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | buflen = intf->cur_altsetting->endpoint->extralen; |
| 990 | buffer = intf->cur_altsetting->endpoint->extra; |
| 991 | } else { |
Greg Kroah-Hartman | 9908a32 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 992 | dev_err(&intf->dev, |
| 993 | "Zero length descriptor references\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | return -EINVAL; |
| 995 | } |
| 996 | } |
| 997 | |
| 998 | while (buflen > 0) { |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 999 | if (buffer[1] != USB_DT_CS_INTERFACE) { |
Greg Kroah-Hartman | 9908a32 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 1000 | dev_err(&intf->dev, "skipping garbage\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | goto next_desc; |
| 1002 | } |
| 1003 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1004 | switch (buffer[2]) { |
| 1005 | case USB_CDC_UNION_TYPE: /* we've found it */ |
| 1006 | if (union_header) { |
| 1007 | dev_err(&intf->dev, "More than one " |
| 1008 | "union descriptor, skipping ...\n"); |
| 1009 | goto next_desc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | } |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1011 | union_header = (struct usb_cdc_union_desc *)buffer; |
| 1012 | break; |
| 1013 | case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ |
| 1014 | cfd = (struct usb_cdc_country_functional_desc *)buffer; |
| 1015 | break; |
| 1016 | case USB_CDC_HEADER_TYPE: /* maybe check version */ |
| 1017 | break; /* for now we ignore it */ |
| 1018 | case USB_CDC_ACM_TYPE: |
| 1019 | ac_management_function = buffer[3]; |
| 1020 | break; |
| 1021 | case USB_CDC_CALL_MANAGEMENT_TYPE: |
| 1022 | call_management_function = buffer[3]; |
| 1023 | call_interface_num = buffer[4]; |
| 1024 | if ((call_management_function & 3) != 3) |
| 1025 | dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n"); |
| 1026 | break; |
| 1027 | default: |
| 1028 | /* there are LOTS more CDC descriptors that |
| 1029 | * could legitimately be found here. |
| 1030 | */ |
| 1031 | dev_dbg(&intf->dev, "Ignoring descriptor: " |
| 1032 | "type %02x, length %d\n", |
| 1033 | buffer[2], buffer[0]); |
| 1034 | break; |
| 1035 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | next_desc: |
| 1037 | buflen -= buffer[0]; |
| 1038 | buffer += buffer[0]; |
| 1039 | } |
| 1040 | |
| 1041 | if (!union_header) { |
| 1042 | if (call_interface_num > 0) { |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1043 | dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); |
| 1045 | control_interface = intf; |
| 1046 | } else { |
Oliver Neukum | a2bfb4a | 2009-05-16 21:13:19 +0200 | [diff] [blame] | 1047 | if (intf->cur_altsetting->desc.bNumEndpoints != 3) { |
| 1048 | dev_dbg(&intf->dev,"No union descriptor, giving up\n"); |
| 1049 | return -ENODEV; |
| 1050 | } else { |
| 1051 | dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); |
| 1052 | combined_interfaces = 1; |
| 1053 | control_interface = data_interface = intf; |
| 1054 | goto look_for_collapsed_interface; |
| 1055 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | } |
| 1057 | } else { |
| 1058 | control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); |
| 1059 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); |
| 1060 | if (!control_interface || !data_interface) { |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1061 | dev_dbg(&intf->dev, "no interfaces\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | return -ENODEV; |
| 1063 | } |
| 1064 | } |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1065 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | if (data_interface_num != call_interface_num) |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1067 | dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | |
Oliver Neukum | a2bfb4a | 2009-05-16 21:13:19 +0200 | [diff] [blame] | 1069 | if (control_interface == data_interface) { |
| 1070 | /* some broken devices designed for windows work this way */ |
| 1071 | dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); |
| 1072 | combined_interfaces = 1; |
| 1073 | /* a popular other OS doesn't use it */ |
| 1074 | quirks |= NO_CAP_LINE; |
| 1075 | if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { |
| 1076 | dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); |
| 1077 | return -EINVAL; |
| 1078 | } |
| 1079 | look_for_collapsed_interface: |
| 1080 | for (i = 0; i < 3; i++) { |
| 1081 | struct usb_endpoint_descriptor *ep; |
| 1082 | ep = &data_interface->cur_altsetting->endpoint[i].desc; |
| 1083 | |
| 1084 | if (usb_endpoint_is_int_in(ep)) |
| 1085 | epctrl = ep; |
| 1086 | else if (usb_endpoint_is_bulk_out(ep)) |
| 1087 | epwrite = ep; |
| 1088 | else if (usb_endpoint_is_bulk_in(ep)) |
| 1089 | epread = ep; |
| 1090 | else |
| 1091 | return -EINVAL; |
| 1092 | } |
| 1093 | if (!epctrl || !epread || !epwrite) |
| 1094 | return -ENODEV; |
| 1095 | else |
| 1096 | goto made_compressed_probe; |
| 1097 | } |
| 1098 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | skip_normal_probe: |
| 1100 | |
| 1101 | /*workaround for switched interfaces */ |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1102 | if (data_interface->cur_altsetting->desc.bInterfaceClass |
| 1103 | != CDC_DATA_INTERFACE_TYPE) { |
| 1104 | if (control_interface->cur_altsetting->desc.bInterfaceClass |
| 1105 | == CDC_DATA_INTERFACE_TYPE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | struct usb_interface *t; |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1107 | dev_dbg(&intf->dev, |
| 1108 | "Your device has switched interfaces.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | t = control_interface; |
| 1110 | control_interface = data_interface; |
| 1111 | data_interface = t; |
| 1112 | } else { |
| 1113 | return -EINVAL; |
| 1114 | } |
| 1115 | } |
Alan Stern | 74da5d6 | 2007-08-02 13:29:10 -0400 | [diff] [blame] | 1116 | |
| 1117 | /* Accept probe requests only for the control interface */ |
Oliver Neukum | a2bfb4a | 2009-05-16 21:13:19 +0200 | [diff] [blame] | 1118 | if (!combined_interfaces && intf != control_interface) |
Alan Stern | 74da5d6 | 2007-08-02 13:29:10 -0400 | [diff] [blame] | 1119 | return -ENODEV; |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1120 | |
Oliver Neukum | a2bfb4a | 2009-05-16 21:13:19 +0200 | [diff] [blame] | 1121 | if (!combined_interfaces && usb_interface_claimed(data_interface)) { |
| 1122 | /* valid in this context */ |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1123 | dev_dbg(&intf->dev, "The data interface isn't available\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | return -EBUSY; |
| 1125 | } |
| 1126 | |
| 1127 | |
| 1128 | if (data_interface->cur_altsetting->desc.bNumEndpoints < 2) |
| 1129 | return -EINVAL; |
| 1130 | |
| 1131 | epctrl = &control_interface->cur_altsetting->endpoint[0].desc; |
| 1132 | epread = &data_interface->cur_altsetting->endpoint[0].desc; |
| 1133 | epwrite = &data_interface->cur_altsetting->endpoint[1].desc; |
| 1134 | |
| 1135 | |
| 1136 | /* workaround for switched endpoints */ |
Luiz Fernando N. Capitulino | 45aea70 | 2006-10-26 13:02:48 -0300 | [diff] [blame] | 1137 | if (!usb_endpoint_dir_in(epread)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | /* descriptors are swapped */ |
| 1139 | struct usb_endpoint_descriptor *t; |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1140 | dev_dbg(&intf->dev, |
| 1141 | "The data interface has switched endpoints\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | t = epread; |
| 1143 | epread = epwrite; |
| 1144 | epwrite = t; |
| 1145 | } |
Oliver Neukum | a2bfb4a | 2009-05-16 21:13:19 +0200 | [diff] [blame] | 1146 | made_compressed_probe: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | dbg("interfaces are valid"); |
| 1148 | for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++); |
| 1149 | |
| 1150 | if (minor == ACM_TTY_MINORS) { |
Greg Kroah-Hartman | 9908a32 | 2008-08-14 09:37:34 -0700 | [diff] [blame] | 1151 | dev_err(&intf->dev, "no more free acm devices\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | return -ENODEV; |
| 1153 | } |
| 1154 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1155 | acm = kzalloc(sizeof(struct acm), GFP_KERNEL); |
| 1156 | if (acm == NULL) { |
Joe Perches | 898eb71 | 2007-10-18 03:06:30 -0700 | [diff] [blame] | 1157 | dev_dbg(&intf->dev, "out of memory (acm kzalloc)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | goto alloc_fail; |
| 1159 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | |
| 1161 | ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize); |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1162 | readsize = le16_to_cpu(epread->wMaxPacketSize) * |
| 1163 | (quirks == SINGLE_RX_URB ? 1 : 2); |
Oliver Neukum | a2bfb4a | 2009-05-16 21:13:19 +0200 | [diff] [blame] | 1164 | acm->combined_interfaces = combined_interfaces; |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 1165 | acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | acm->control = control_interface; |
| 1167 | acm->data = data_interface; |
| 1168 | acm->minor = minor; |
| 1169 | acm->dev = usb_dev; |
| 1170 | acm->ctrl_caps = ac_management_function; |
Oliver Neukum | a2bfb4a | 2009-05-16 21:13:19 +0200 | [diff] [blame] | 1171 | if (quirks & NO_CAP_LINE) |
| 1172 | acm->ctrl_caps &= ~USB_CDC_CAP_LINE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | acm->ctrlsize = ctrlsize; |
| 1174 | acm->readsize = readsize; |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 1175 | acm->rx_buflimit = num_rx_buf; |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1176 | acm->urb_task.func = acm_rx_tasklet; |
| 1177 | acm->urb_task.data = (unsigned long) acm; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1178 | INIT_WORK(&acm->work, acm_softint); |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 1179 | INIT_WORK(&acm->waker, acm_waker); |
David Brownell | e5fbab5 | 2008-08-06 18:46:10 -0700 | [diff] [blame] | 1180 | init_waitqueue_head(&acm->drain_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | spin_lock_init(&acm->throttle_lock); |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 1182 | spin_lock_init(&acm->write_lock); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1183 | spin_lock_init(&acm->read_lock); |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1184 | mutex_init(&acm->mutex); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1185 | acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); |
Alan Cox | 739e028 | 2009-06-11 12:27:50 +0100 | [diff] [blame] | 1186 | tty_port_init(&acm->port); |
| 1187 | acm->port.ops = &acm_port_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | |
| 1189 | buf = usb_buffer_alloc(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); |
| 1190 | if (!buf) { |
Joe Perches | 898eb71 | 2007-10-18 03:06:30 -0700 | [diff] [blame] | 1191 | dev_dbg(&intf->dev, "out of memory (ctrl buffer alloc)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | goto alloc_fail2; |
| 1193 | } |
| 1194 | acm->ctrl_buffer = buf; |
| 1195 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 1196 | if (acm_write_buffers_alloc(acm) < 0) { |
Joe Perches | 898eb71 | 2007-10-18 03:06:30 -0700 | [diff] [blame] | 1197 | dev_dbg(&intf->dev, "out of memory (write buffer alloc)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | goto alloc_fail4; |
| 1199 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | |
| 1201 | acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); |
| 1202 | if (!acm->ctrlurb) { |
Joe Perches | 898eb71 | 2007-10-18 03:06:30 -0700 | [diff] [blame] | 1203 | dev_dbg(&intf->dev, "out of memory (ctrlurb kmalloc)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | goto alloc_fail5; |
| 1205 | } |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 1206 | for (i = 0; i < num_rx_buf; i++) { |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1207 | struct acm_ru *rcv = &(acm->ru[i]); |
| 1208 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1209 | rcv->urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1210 | if (rcv->urb == NULL) { |
| 1211 | dev_dbg(&intf->dev, |
| 1212 | "out of memory (read urbs usb_alloc_urb)\n"); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1213 | goto alloc_fail7; |
| 1214 | } |
| 1215 | |
| 1216 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 1217 | rcv->instance = acm; |
| 1218 | } |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 1219 | for (i = 0; i < num_rx_buf; i++) { |
David Brownell | 672c4e1 | 2008-08-06 18:41:12 -0700 | [diff] [blame] | 1220 | struct acm_rb *rb = &(acm->rb[i]); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1221 | |
David Brownell | 672c4e1 | 2008-08-06 18:41:12 -0700 | [diff] [blame] | 1222 | rb->base = usb_buffer_alloc(acm->dev, readsize, |
| 1223 | GFP_KERNEL, &rb->dma); |
| 1224 | if (!rb->base) { |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1225 | dev_dbg(&intf->dev, |
| 1226 | "out of memory (read bufs usb_buffer_alloc)\n"); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1227 | goto alloc_fail7; |
| 1228 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | } |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1230 | for (i = 0; i < ACM_NW; i++) { |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 1231 | struct acm_wb *snd = &(acm->wb[i]); |
| 1232 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1233 | snd->urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1234 | if (snd->urb == NULL) { |
| 1235 | dev_dbg(&intf->dev, |
| 1236 | "out of memory (write urbs usb_alloc_urb)"); |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 1237 | goto alloc_fail7; |
| 1238 | } |
| 1239 | |
Arseniy Lartsev | 5186ffe | 2009-07-01 16:27:26 +0400 | [diff] [blame] | 1240 | if (usb_endpoint_xfer_int(epwrite)) |
| 1241 | usb_fill_int_urb(snd->urb, usb_dev, |
| 1242 | usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), |
| 1243 | NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); |
| 1244 | else |
| 1245 | usb_fill_bulk_urb(snd->urb, usb_dev, |
| 1246 | usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), |
| 1247 | NULL, acm->writesize, acm_write_bulk, snd); |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 1248 | snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 1249 | snd->instance = acm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | } |
| 1251 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1252 | usb_set_intfdata(intf, acm); |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 1253 | |
| 1254 | i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); |
| 1255 | if (i < 0) |
| 1256 | goto alloc_fail8; |
| 1257 | |
| 1258 | if (cfd) { /* export the country data */ |
| 1259 | acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); |
| 1260 | if (!acm->country_codes) |
| 1261 | goto skip_countries; |
| 1262 | acm->country_code_size = cfd->bLength - 4; |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1263 | memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, |
| 1264 | cfd->bLength - 4); |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 1265 | acm->country_rel_date = cfd->iCountryCodeRelDate; |
| 1266 | |
| 1267 | i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); |
| 1268 | if (i < 0) { |
| 1269 | kfree(acm->country_codes); |
| 1270 | goto skip_countries; |
| 1271 | } |
| 1272 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1273 | i = device_create_file(&intf->dev, |
| 1274 | &dev_attr_iCountryCodeRelDate); |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 1275 | if (i < 0) { |
| 1276 | kfree(acm->country_codes); |
| 1277 | goto skip_countries; |
| 1278 | } |
| 1279 | } |
| 1280 | |
| 1281 | skip_countries: |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1282 | usb_fill_int_urb(acm->ctrlurb, usb_dev, |
Oliver Neukum | a2bfb4a | 2009-05-16 21:13:19 +0200 | [diff] [blame] | 1283 | usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), |
| 1284 | acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, |
| 1285 | /* works around buggy devices */ |
| 1286 | epctrl->bInterval ? epctrl->bInterval : 0xff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 1288 | acm->ctrlurb->transfer_dma = acm->ctrl_dma; |
| 1289 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); |
| 1291 | |
| 1292 | acm_set_control(acm, acm->ctrlout); |
| 1293 | |
| 1294 | acm->line.dwDTERate = cpu_to_le32(9600); |
| 1295 | acm->line.bDataBits = 8; |
| 1296 | acm_set_line(acm, &acm->line); |
| 1297 | |
| 1298 | usb_driver_claim_interface(&acm_driver, data_interface, acm); |
David Brownell | 672c4e1 | 2008-08-06 18:41:12 -0700 | [diff] [blame] | 1299 | usb_set_intfdata(data_interface, acm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | |
brian@murphy.dk | 83ef344 | 2005-06-29 16:53:29 -0700 | [diff] [blame] | 1301 | usb_get_intf(control_interface); |
| 1302 | tty_register_device(acm_tty_driver, minor, &control_interface->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | |
| 1304 | acm_table[minor] = acm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 1306 | return 0; |
| 1307 | alloc_fail8: |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 1308 | for (i = 0; i < ACM_NW; i++) |
| 1309 | usb_free_urb(acm->wb[i].urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | alloc_fail7: |
Oliver Neukum | 830f402 | 2008-06-25 14:17:16 +0200 | [diff] [blame] | 1311 | acm_read_buffers_free(acm); |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 1312 | for (i = 0; i < num_rx_buf; i++) |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1313 | usb_free_urb(acm->ru[i].urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | usb_free_urb(acm->ctrlurb); |
| 1315 | alloc_fail5: |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 1316 | acm_write_buffers_free(acm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | alloc_fail4: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | usb_buffer_free(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
| 1319 | alloc_fail2: |
| 1320 | kfree(acm); |
| 1321 | alloc_fail: |
| 1322 | return -ENOMEM; |
| 1323 | } |
| 1324 | |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1325 | static void stop_data_traffic(struct acm *acm) |
| 1326 | { |
| 1327 | int i; |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 1328 | dbg("Entering stop_data_traffic"); |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1329 | |
| 1330 | tasklet_disable(&acm->urb_task); |
| 1331 | |
| 1332 | usb_kill_urb(acm->ctrlurb); |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1333 | for (i = 0; i < ACM_NW; i++) |
David Engraf | e4cf3aa | 2008-03-20 10:01:34 +0100 | [diff] [blame] | 1334 | usb_kill_urb(acm->wb[i].urb); |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1335 | for (i = 0; i < acm->rx_buflimit; i++) |
| 1336 | usb_kill_urb(acm->ru[i].urb); |
| 1337 | |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1338 | tasklet_enable(&acm->urb_task); |
| 1339 | |
| 1340 | cancel_work_sync(&acm->work); |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 1341 | cancel_work_sync(&acm->waker); |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1342 | } |
| 1343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | static void acm_disconnect(struct usb_interface *intf) |
| 1345 | { |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 1346 | struct acm *acm = usb_get_intfdata(intf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 1348 | struct tty_struct *tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | |
David Brownell | 672c4e1 | 2008-08-06 18:41:12 -0700 | [diff] [blame] | 1350 | /* sibling interface is already cleaning up */ |
| 1351 | if (!acm) |
Oliver Neukum | 86067eea | 2006-01-08 12:39:13 +0100 | [diff] [blame] | 1352 | return; |
David Brownell | 672c4e1 | 2008-08-06 18:41:12 -0700 | [diff] [blame] | 1353 | |
| 1354 | mutex_lock(&open_mutex); |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1355 | if (acm->country_codes) { |
Alan Stern | 74da5d6 | 2007-08-02 13:29:10 -0400 | [diff] [blame] | 1356 | device_remove_file(&acm->control->dev, |
| 1357 | &dev_attr_wCountryCodes); |
| 1358 | device_remove_file(&acm->control->dev, |
| 1359 | &dev_attr_iCountryCodeRelDate); |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 1360 | } |
Alan Stern | 74da5d6 | 2007-08-02 13:29:10 -0400 | [diff] [blame] | 1361 | device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | acm->dev = NULL; |
Oliver Neukum | 86067eea | 2006-01-08 12:39:13 +0100 | [diff] [blame] | 1363 | usb_set_intfdata(acm->control, NULL); |
| 1364 | usb_set_intfdata(acm->data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1366 | stop_data_traffic(acm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 1368 | acm_write_buffers_free(acm); |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1369 | usb_buffer_free(usb_dev, acm->ctrlsize, acm->ctrl_buffer, |
| 1370 | acm->ctrl_dma); |
Oliver Neukum | 830f402 | 2008-06-25 14:17:16 +0200 | [diff] [blame] | 1371 | acm_read_buffers_free(acm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | |
Oliver Neukum | a2bfb4a | 2009-05-16 21:13:19 +0200 | [diff] [blame] | 1373 | if (!acm->combined_interfaces) |
| 1374 | usb_driver_release_interface(&acm_driver, intf == acm->control ? |
Oliver Neukum | 830f402 | 2008-06-25 14:17:16 +0200 | [diff] [blame] | 1375 | acm->data : acm->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 1377 | if (acm->port.count == 0) { |
brian@murphy.dk | 83ef344 | 2005-06-29 16:53:29 -0700 | [diff] [blame] | 1378 | acm_tty_unregister(acm); |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 1379 | mutex_unlock(&open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | return; |
| 1381 | } |
| 1382 | |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 1383 | mutex_unlock(&open_mutex); |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 1384 | tty = tty_port_tty_get(&acm->port); |
| 1385 | if (tty) { |
| 1386 | tty_hangup(tty); |
| 1387 | tty_kref_put(tty); |
| 1388 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | } |
| 1390 | |
Oliver Neukum | 3575858 | 2008-07-01 19:10:08 +0200 | [diff] [blame] | 1391 | #ifdef CONFIG_PM |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1392 | static int acm_suspend(struct usb_interface *intf, pm_message_t message) |
| 1393 | { |
| 1394 | struct acm *acm = usb_get_intfdata(intf); |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 1395 | int cnt; |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1396 | |
Alan Stern | 65bfd29 | 2008-11-25 16:39:18 -0500 | [diff] [blame] | 1397 | if (message.event & PM_EVENT_AUTO) { |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 1398 | int b; |
| 1399 | |
| 1400 | spin_lock_irq(&acm->read_lock); |
| 1401 | spin_lock(&acm->write_lock); |
| 1402 | b = acm->processing + acm->transmitting; |
| 1403 | spin_unlock(&acm->write_lock); |
| 1404 | spin_unlock_irq(&acm->read_lock); |
| 1405 | if (b) |
| 1406 | return -EBUSY; |
| 1407 | } |
| 1408 | |
| 1409 | spin_lock_irq(&acm->read_lock); |
| 1410 | spin_lock(&acm->write_lock); |
| 1411 | cnt = acm->susp_count++; |
| 1412 | spin_unlock(&acm->write_lock); |
| 1413 | spin_unlock_irq(&acm->read_lock); |
| 1414 | |
| 1415 | if (cnt) |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1416 | return 0; |
| 1417 | /* |
| 1418 | we treat opened interfaces differently, |
| 1419 | we must guard against open |
| 1420 | */ |
| 1421 | mutex_lock(&acm->mutex); |
| 1422 | |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 1423 | if (acm->port.count) |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1424 | stop_data_traffic(acm); |
| 1425 | |
| 1426 | mutex_unlock(&acm->mutex); |
| 1427 | return 0; |
| 1428 | } |
| 1429 | |
| 1430 | static int acm_resume(struct usb_interface *intf) |
| 1431 | { |
| 1432 | struct acm *acm = usb_get_intfdata(intf); |
| 1433 | int rv = 0; |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 1434 | int cnt; |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1435 | |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 1436 | spin_lock_irq(&acm->read_lock); |
| 1437 | acm->susp_count -= 1; |
| 1438 | cnt = acm->susp_count; |
| 1439 | spin_unlock_irq(&acm->read_lock); |
| 1440 | |
| 1441 | if (cnt) |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1442 | return 0; |
| 1443 | |
| 1444 | mutex_lock(&acm->mutex); |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 1445 | if (acm->port.count) { |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1446 | rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO); |
| 1447 | if (rv < 0) |
Oliver Neukum | 11ea859 | 2008-06-20 11:25:57 +0200 | [diff] [blame] | 1448 | goto err_out; |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1449 | |
| 1450 | tasklet_schedule(&acm->urb_task); |
| 1451 | } |
| 1452 | |
| 1453 | err_out: |
| 1454 | mutex_unlock(&acm->mutex); |
| 1455 | return rv; |
| 1456 | } |
Oliver Neukum | 3575858 | 2008-07-01 19:10:08 +0200 | [diff] [blame] | 1457 | |
| 1458 | #endif /* CONFIG_PM */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | /* |
| 1460 | * USB driver structure. |
| 1461 | */ |
| 1462 | |
| 1463 | static struct usb_device_id acm_ids[] = { |
| 1464 | /* quirky and broken devices */ |
| 1465 | { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ |
| 1466 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1467 | }, |
Andrey Arapov | b0e2a70 | 2007-07-04 17:11:42 +0200 | [diff] [blame] | 1468 | { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ |
| 1469 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1470 | }, |
Andrew Lunn | 0f9c7b4 | 2008-12-23 17:31:23 +0100 | [diff] [blame] | 1471 | { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ |
| 1472 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1473 | }, |
Masahito Omote | 8753e65 | 2005-07-29 12:17:25 -0700 | [diff] [blame] | 1474 | { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ |
| 1475 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1476 | }, |
Chris Malley | 91a9c92 | 2006-10-03 10:08:28 +0100 | [diff] [blame] | 1477 | { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ |
| 1478 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1479 | }, |
Alan Cox | 7abcf20 | 2009-04-06 17:35:01 +0100 | [diff] [blame] | 1480 | { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ |
| 1481 | .driver_info = SINGLE_RX_URB, |
| 1482 | }, |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 1483 | { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ |
| 1484 | .driver_info = SINGLE_RX_URB, /* firmware bug */ |
| 1485 | }, |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 1486 | { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ |
| 1487 | .driver_info = SINGLE_RX_URB, /* firmware bug */ |
| 1488 | }, |
Oliver Neukum | 9be8456 | 2007-02-12 08:50:03 +0100 | [diff] [blame] | 1489 | { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ |
| 1490 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1491 | }, |
Iain McFarlane | 6149ed5 | 2008-05-04 00:13:49 +0100 | [diff] [blame] | 1492 | { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ |
| 1493 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1494 | }, |
Eric Sandeen | c8fd2c3 | 2008-08-14 08:25:40 -0500 | [diff] [blame] | 1495 | { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ |
| 1496 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1497 | }, |
Alan Cox | c89c60e | 2009-01-11 19:53:10 +0000 | [diff] [blame] | 1498 | { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ |
| 1499 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1500 | }, |
Xiao Kaijian | cab98a0 | 2009-05-08 00:48:23 +0800 | [diff] [blame] | 1501 | { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ |
| 1502 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1503 | }, |
Dmitriy Taychenachev | 155df65 | 2009-02-25 12:36:51 +0800 | [diff] [blame] | 1504 | { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ |
| 1505 | }, |
Adam Richter | c332b4e | 2009-02-18 16:17:15 -0800 | [diff] [blame] | 1506 | { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ |
| 1507 | .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on |
| 1508 | data interface instead of |
| 1509 | communications interface. |
| 1510 | Maybe we should define a new |
| 1511 | quirk for this. */ |
| 1512 | }, |
Kir Kolyshkin | 1f17c50 | 2009-05-28 20:33:58 +0400 | [diff] [blame] | 1513 | { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ |
| 1514 | .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ |
| 1515 | }, |
Oliver Neukum | 9be8456 | 2007-02-12 08:50:03 +0100 | [diff] [blame] | 1516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | /* control interfaces with various AT-command sets */ |
| 1518 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1519 | USB_CDC_ACM_PROTO_AT_V25TER) }, |
| 1520 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1521 | USB_CDC_ACM_PROTO_AT_PCCA101) }, |
| 1522 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1523 | USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, |
| 1524 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1525 | USB_CDC_ACM_PROTO_AT_GSM) }, |
| 1526 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1527 | USB_CDC_ACM_PROTO_AT_3G) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1529 | USB_CDC_ACM_PROTO_AT_CDMA) }, |
| 1530 | |
| 1531 | /* NOTE: COMM/ACM/0xff is likely MSFT RNDIS ... NOT a modem!! */ |
| 1532 | { } |
| 1533 | }; |
| 1534 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1535 | MODULE_DEVICE_TABLE(usb, acm_ids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | |
| 1537 | static struct usb_driver acm_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | .name = "cdc_acm", |
| 1539 | .probe = acm_probe, |
| 1540 | .disconnect = acm_disconnect, |
Oliver Neukum | 3575858 | 2008-07-01 19:10:08 +0200 | [diff] [blame] | 1541 | #ifdef CONFIG_PM |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1542 | .suspend = acm_suspend, |
| 1543 | .resume = acm_resume, |
Oliver Neukum | 3575858 | 2008-07-01 19:10:08 +0200 | [diff] [blame] | 1544 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | .id_table = acm_ids, |
Oliver Neukum | 3575858 | 2008-07-01 19:10:08 +0200 | [diff] [blame] | 1546 | #ifdef CONFIG_PM |
Oliver Neukum | 1365baf | 2007-10-12 17:24:28 +0200 | [diff] [blame] | 1547 | .supports_autosuspend = 1, |
Oliver Neukum | 3575858 | 2008-07-01 19:10:08 +0200 | [diff] [blame] | 1548 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | }; |
| 1550 | |
| 1551 | /* |
| 1552 | * TTY driver structures. |
| 1553 | */ |
| 1554 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 1555 | static const struct tty_operations acm_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | .open = acm_tty_open, |
| 1557 | .close = acm_tty_close, |
Alan Cox | 10077d4 | 2009-06-11 12:36:09 +0100 | [diff] [blame] | 1558 | .hangup = acm_tty_hangup, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | .write = acm_tty_write, |
| 1560 | .write_room = acm_tty_write_room, |
| 1561 | .ioctl = acm_tty_ioctl, |
| 1562 | .throttle = acm_tty_throttle, |
| 1563 | .unthrottle = acm_tty_unthrottle, |
| 1564 | .chars_in_buffer = acm_tty_chars_in_buffer, |
| 1565 | .break_ctl = acm_tty_break_ctl, |
| 1566 | .set_termios = acm_tty_set_termios, |
| 1567 | .tiocmget = acm_tty_tiocmget, |
| 1568 | .tiocmset = acm_tty_tiocmset, |
| 1569 | }; |
| 1570 | |
| 1571 | /* |
| 1572 | * Init / exit. |
| 1573 | */ |
| 1574 | |
| 1575 | static int __init acm_init(void) |
| 1576 | { |
| 1577 | int retval; |
| 1578 | acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); |
| 1579 | if (!acm_tty_driver) |
| 1580 | return -ENOMEM; |
| 1581 | acm_tty_driver->owner = THIS_MODULE, |
| 1582 | acm_tty_driver->driver_name = "acm", |
| 1583 | acm_tty_driver->name = "ttyACM", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | acm_tty_driver->major = ACM_TTY_MAJOR, |
| 1585 | acm_tty_driver->minor_start = 0, |
| 1586 | acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, |
| 1587 | acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, |
Greg Kroah-Hartman | 331b831 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1588 | acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | acm_tty_driver->init_termios = tty_std_termios; |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1590 | acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | |
| 1591 | HUPCL | CLOCAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | tty_set_operations(acm_tty_driver, &acm_ops); |
| 1593 | |
| 1594 | retval = tty_register_driver(acm_tty_driver); |
| 1595 | if (retval) { |
| 1596 | put_tty_driver(acm_tty_driver); |
| 1597 | return retval; |
| 1598 | } |
| 1599 | |
| 1600 | retval = usb_register(&acm_driver); |
| 1601 | if (retval) { |
| 1602 | tty_unregister_driver(acm_tty_driver); |
| 1603 | put_tty_driver(acm_tty_driver); |
| 1604 | return retval; |
| 1605 | } |
| 1606 | |
Greg Kroah-Hartman | 5909f6e | 2008-08-18 13:21:04 -0700 | [diff] [blame] | 1607 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
| 1608 | DRIVER_DESC "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | |
| 1610 | return 0; |
| 1611 | } |
| 1612 | |
| 1613 | static void __exit acm_exit(void) |
| 1614 | { |
| 1615 | usb_deregister(&acm_driver); |
| 1616 | tty_unregister_driver(acm_tty_driver); |
| 1617 | put_tty_driver(acm_tty_driver); |
| 1618 | } |
| 1619 | |
| 1620 | module_init(acm_init); |
| 1621 | module_exit(acm_exit); |
| 1622 | |
Alan Cox | 6e47e06 | 2009-06-11 12:37:06 +0100 | [diff] [blame] | 1623 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1624 | MODULE_DESCRIPTION(DRIVER_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | MODULE_LICENSE("GPL"); |
Scott James Remnant | e766aeb | 2009-04-06 17:33:18 +0100 | [diff] [blame] | 1626 | MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); |