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 |
| 19 | * v0.12 - added TIOCM ioctls, added break handling, made struct acm kmalloced |
| 20 | * v0.13 - added termios, added hangup |
| 21 | * v0.14 - sized down struct acm |
| 22 | * v0.15 - fixed flow control again - characters could be lost |
| 23 | * v0.16 - added code for modems with swapped data and control interfaces |
| 24 | * v0.17 - added new style probing |
| 25 | * v0.18 - fixed new style probing for devices with more configurations |
| 26 | * v0.19 - fixed CLOCAL handling (thanks to Richard Shih-Ping Chan) |
| 27 | * v0.20 - switched to probing on interface (rather than device) class |
| 28 | * v0.21 - revert to probing on device for devices with multiple configs |
| 29 | * v0.22 - probe only the control interface. if usbcore doesn't choose the |
| 30 | * config we want, sysadmin changes bConfigurationValue in sysfs. |
| 31 | * v0.23 - use softirq for rx processing, as needed by tty layer |
| 32 | * v0.24 - change probe method to evaluate CDC union descriptor |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 33 | * v0.25 - downstream tasks paralelized to maximize throughput |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | */ |
| 35 | |
| 36 | /* |
| 37 | * This program is free software; you can redistribute it and/or modify |
| 38 | * it under the terms of the GNU General Public License as published by |
| 39 | * the Free Software Foundation; either version 2 of the License, or |
| 40 | * (at your option) any later version. |
| 41 | * |
| 42 | * This program is distributed in the hope that it will be useful, |
| 43 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 44 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 45 | * GNU General Public License for more details. |
| 46 | * |
| 47 | * You should have received a copy of the GNU General Public License |
| 48 | * along with this program; if not, write to the Free Software |
| 49 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 50 | */ |
| 51 | |
| 52 | #undef DEBUG |
| 53 | |
| 54 | #include <linux/kernel.h> |
| 55 | #include <linux/errno.h> |
| 56 | #include <linux/init.h> |
| 57 | #include <linux/slab.h> |
| 58 | #include <linux/tty.h> |
| 59 | #include <linux/tty_driver.h> |
| 60 | #include <linux/tty_flip.h> |
| 61 | #include <linux/module.h> |
| 62 | #include <linux/smp_lock.h> |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 63 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #include <asm/uaccess.h> |
| 65 | #include <linux/usb.h> |
David Brownell | a8c28f2 | 2006-06-13 09:57:47 -0700 | [diff] [blame] | 66 | #include <linux/usb/cdc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #include <asm/byteorder.h> |
| 68 | #include <asm/unaligned.h> |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 69 | #include <linux/list.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
| 71 | #include "cdc-acm.h" |
| 72 | |
| 73 | /* |
| 74 | * Version Information |
| 75 | */ |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 76 | #define DRIVER_VERSION "v0.25" |
| 77 | #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] | 78 | #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" |
| 79 | |
| 80 | static struct usb_driver acm_driver; |
| 81 | static struct tty_driver *acm_tty_driver; |
| 82 | static struct acm *acm_table[ACM_TTY_MINORS]; |
| 83 | |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 84 | static DEFINE_MUTEX(open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
| 86 | #define ACM_READY(acm) (acm && acm->dev && acm->used) |
| 87 | |
| 88 | /* |
| 89 | * Functions for ACM control messages. |
| 90 | */ |
| 91 | |
| 92 | static int acm_ctrl_msg(struct acm *acm, int request, int value, void *buf, int len) |
| 93 | { |
| 94 | int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), |
| 95 | request, USB_RT_ACM, value, |
| 96 | acm->control->altsetting[0].desc.bInterfaceNumber, |
| 97 | buf, len, 5000); |
| 98 | dbg("acm_control_msg: rq: 0x%02x val: %#x len: %#x result: %d", request, value, len, retval); |
| 99 | return retval < 0 ? retval : 0; |
| 100 | } |
| 101 | |
| 102 | /* devices aren't required to support these requests. |
| 103 | * the cdc acm descriptor tells whether they do... |
| 104 | */ |
| 105 | #define acm_set_control(acm, control) \ |
| 106 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0) |
| 107 | #define acm_set_line(acm, line) \ |
| 108 | acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) |
| 109 | #define acm_send_break(acm, ms) \ |
| 110 | acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) |
| 111 | |
| 112 | /* |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 113 | * Write buffer management. |
| 114 | * All of these assume proper locks taken by the caller. |
| 115 | */ |
| 116 | |
| 117 | static int acm_wb_alloc(struct acm *acm) |
| 118 | { |
| 119 | int i, wbn; |
| 120 | struct acm_wb *wb; |
| 121 | |
| 122 | wbn = acm->write_current; |
| 123 | i = 0; |
| 124 | for (;;) { |
| 125 | wb = &acm->wb[wbn]; |
| 126 | if (!wb->use) { |
| 127 | wb->use = 1; |
| 128 | return wbn; |
| 129 | } |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 130 | wbn = (wbn + 1) % ACM_NW; |
| 131 | if (++i >= ACM_NW) |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 132 | return -1; |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | static void acm_wb_free(struct acm *acm, int wbn) |
| 137 | { |
| 138 | acm->wb[wbn].use = 0; |
| 139 | } |
| 140 | |
| 141 | static int acm_wb_is_avail(struct acm *acm) |
| 142 | { |
| 143 | int i, n; |
| 144 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 145 | n = ACM_NW; |
| 146 | for (i = 0; i < ACM_NW; i++) { |
| 147 | n -= acm->wb[i].use; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 148 | } |
| 149 | return n; |
| 150 | } |
| 151 | |
| 152 | static inline int acm_wb_is_used(struct acm *acm, int wbn) |
| 153 | { |
| 154 | return acm->wb[wbn].use; |
| 155 | } |
| 156 | |
| 157 | /* |
| 158 | * Finish write. |
| 159 | */ |
| 160 | static void acm_write_done(struct acm *acm) |
| 161 | { |
| 162 | unsigned long flags; |
| 163 | int wbn; |
| 164 | |
| 165 | spin_lock_irqsave(&acm->write_lock, flags); |
| 166 | acm->write_ready = 1; |
| 167 | wbn = acm->write_current; |
| 168 | acm_wb_free(acm, wbn); |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 169 | acm->write_current = (wbn + 1) % ACM_NW; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 170 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 171 | } |
| 172 | |
| 173 | /* |
| 174 | * Poke write. |
| 175 | */ |
| 176 | static int acm_write_start(struct acm *acm) |
| 177 | { |
| 178 | unsigned long flags; |
| 179 | int wbn; |
| 180 | struct acm_wb *wb; |
| 181 | int rc; |
| 182 | |
| 183 | spin_lock_irqsave(&acm->write_lock, flags); |
| 184 | if (!acm->dev) { |
| 185 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 186 | return -ENODEV; |
| 187 | } |
| 188 | |
| 189 | if (!acm->write_ready) { |
| 190 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 191 | return 0; /* A white lie */ |
| 192 | } |
| 193 | |
| 194 | wbn = acm->write_current; |
| 195 | if (!acm_wb_is_used(acm, wbn)) { |
| 196 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 197 | return 0; |
| 198 | } |
| 199 | wb = &acm->wb[wbn]; |
| 200 | |
| 201 | acm->write_ready = 0; |
| 202 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 203 | |
| 204 | acm->writeurb->transfer_buffer = wb->buf; |
| 205 | acm->writeurb->transfer_dma = wb->dmah; |
| 206 | acm->writeurb->transfer_buffer_length = wb->len; |
| 207 | acm->writeurb->dev = acm->dev; |
| 208 | |
| 209 | if ((rc = usb_submit_urb(acm->writeurb, GFP_ATOMIC)) < 0) { |
| 210 | dbg("usb_submit_urb(write bulk) failed: %d", rc); |
| 211 | acm_write_done(acm); |
| 212 | } |
| 213 | return rc; |
| 214 | } |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 215 | /* |
| 216 | * attributes exported through sysfs |
| 217 | */ |
| 218 | static ssize_t show_caps |
| 219 | (struct device *dev, struct device_attribute *attr, char *buf) |
| 220 | { |
| 221 | struct usb_interface *intf = to_usb_interface(dev); |
| 222 | struct acm *acm = usb_get_intfdata(intf); |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 223 | |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 224 | return sprintf(buf, "%d", acm->ctrl_caps); |
| 225 | } |
| 226 | static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL); |
| 227 | |
| 228 | static ssize_t show_country_codes |
| 229 | (struct device *dev, struct device_attribute *attr, char *buf) |
| 230 | { |
| 231 | struct usb_interface *intf = to_usb_interface(dev); |
| 232 | struct acm *acm = usb_get_intfdata(intf); |
| 233 | |
| 234 | memcpy(buf, acm->country_codes, acm->country_code_size); |
| 235 | return acm->country_code_size; |
| 236 | } |
| 237 | |
| 238 | static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL); |
| 239 | |
| 240 | static ssize_t show_country_rel_date |
| 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 | return sprintf(buf, "%d", acm->country_rel_date); |
| 247 | } |
| 248 | |
| 249 | static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL); |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 250 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | * Interrupt handlers for various ACM device responses |
| 252 | */ |
| 253 | |
| 254 | /* control interface reports status changes with "interrupt" transfers */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 255 | static void acm_ctrl_irq(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | { |
| 257 | struct acm *acm = urb->context; |
| 258 | struct usb_cdc_notification *dr = urb->transfer_buffer; |
| 259 | unsigned char *data; |
| 260 | int newctrl; |
| 261 | int status; |
| 262 | |
| 263 | switch (urb->status) { |
| 264 | case 0: |
| 265 | /* success */ |
| 266 | break; |
| 267 | case -ECONNRESET: |
| 268 | case -ENOENT: |
| 269 | case -ESHUTDOWN: |
| 270 | /* this urb is terminated, clean up */ |
| 271 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); |
| 272 | return; |
| 273 | default: |
| 274 | dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); |
| 275 | goto exit; |
| 276 | } |
| 277 | |
| 278 | if (!ACM_READY(acm)) |
| 279 | goto exit; |
| 280 | |
| 281 | data = (unsigned char *)(dr + 1); |
| 282 | switch (dr->bNotificationType) { |
| 283 | |
| 284 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: |
| 285 | |
| 286 | dbg("%s network", dr->wValue ? "connected to" : "disconnected from"); |
| 287 | break; |
| 288 | |
| 289 | case USB_CDC_NOTIFY_SERIAL_STATE: |
| 290 | |
| 291 | newctrl = le16_to_cpu(get_unaligned((__le16 *) data)); |
| 292 | |
| 293 | if (acm->tty && !acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { |
| 294 | dbg("calling hangup"); |
| 295 | tty_hangup(acm->tty); |
| 296 | } |
| 297 | |
| 298 | acm->ctrlin = newctrl; |
| 299 | |
| 300 | dbg("input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c", |
| 301 | acm->ctrlin & ACM_CTRL_DCD ? '+' : '-', acm->ctrlin & ACM_CTRL_DSR ? '+' : '-', |
| 302 | acm->ctrlin & ACM_CTRL_BRK ? '+' : '-', acm->ctrlin & ACM_CTRL_RI ? '+' : '-', |
| 303 | acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-', acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-', |
| 304 | acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-'); |
| 305 | |
| 306 | break; |
| 307 | |
| 308 | default: |
| 309 | dbg("unknown notification %d received: index %d len %d data0 %d data1 %d", |
| 310 | dr->bNotificationType, dr->wIndex, |
| 311 | dr->wLength, data[0], data[1]); |
| 312 | break; |
| 313 | } |
| 314 | exit: |
| 315 | status = usb_submit_urb (urb, GFP_ATOMIC); |
| 316 | if (status) |
| 317 | err ("%s - usb_submit_urb failed with result %d", |
| 318 | __FUNCTION__, status); |
| 319 | } |
| 320 | |
| 321 | /* data interface returns incoming bytes, or we got unthrottled */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 322 | static void acm_read_bulk(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | { |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 324 | struct acm_rb *buf; |
| 325 | struct acm_ru *rcv = urb->context; |
| 326 | struct acm *acm = rcv->instance; |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 327 | int status = urb->status; |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 328 | dbg("Entering acm_read_bulk with status %d", urb->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
| 330 | if (!ACM_READY(acm)) |
| 331 | return; |
| 332 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 333 | if (status) |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 334 | dev_dbg(&acm->data->dev, "bulk rx status %d", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 336 | buf = rcv->buffer; |
| 337 | buf->size = urb->actual_length; |
| 338 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 339 | if (likely(status == 0)) { |
| 340 | spin_lock(&acm->read_lock); |
| 341 | list_add_tail(&rcv->list, &acm->spare_read_urbs); |
| 342 | list_add_tail(&buf->list, &acm->filled_read_bufs); |
| 343 | spin_unlock(&acm->read_lock); |
| 344 | } else { |
| 345 | /* we drop the buffer due to an error */ |
| 346 | spin_lock(&acm->read_lock); |
| 347 | list_add_tail(&rcv->list, &acm->spare_read_urbs); |
| 348 | list_add(&buf->list, &acm->spare_read_bufs); |
| 349 | spin_unlock(&acm->read_lock); |
| 350 | /* nevertheless the tasklet must be kicked unconditionally |
| 351 | so the queue cannot dry up */ |
| 352 | } |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 353 | tasklet_schedule(&acm->urb_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | static void acm_rx_tasklet(unsigned long _acm) |
| 357 | { |
| 358 | struct acm *acm = (void *)_acm; |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 359 | struct acm_rb *buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | struct tty_struct *tty = acm->tty; |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 361 | struct acm_ru *rcv; |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 362 | unsigned long flags; |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 363 | unsigned char throttled; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | dbg("Entering acm_rx_tasklet"); |
| 365 | |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 366 | if (!ACM_READY(acm)) |
| 367 | return; |
| 368 | |
Oliver Neukum | 834dbca | 2007-03-06 10:47:04 +0100 | [diff] [blame] | 369 | spin_lock_irqsave(&acm->throttle_lock, flags); |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 370 | throttled = acm->throttle; |
Oliver Neukum | 834dbca | 2007-03-06 10:47:04 +0100 | [diff] [blame] | 371 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 372 | if (throttled) |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 373 | return; |
| 374 | |
| 375 | next_buffer: |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 376 | spin_lock_irqsave(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 377 | if (list_empty(&acm->filled_read_bufs)) { |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 378 | spin_unlock_irqrestore(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 379 | goto urbs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 381 | buf = list_entry(acm->filled_read_bufs.next, |
| 382 | struct acm_rb, list); |
| 383 | list_del(&buf->list); |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 384 | spin_unlock_irqrestore(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 385 | |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 386 | 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] | 387 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 388 | tty_buffer_request_room(tty, buf->size); |
Oliver Neukum | 834dbca | 2007-03-06 10:47:04 +0100 | [diff] [blame] | 389 | spin_lock_irqsave(&acm->throttle_lock, flags); |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 390 | throttled = acm->throttle; |
Oliver Neukum | 834dbca | 2007-03-06 10:47:04 +0100 | [diff] [blame] | 391 | spin_unlock_irqrestore(&acm->throttle_lock, flags); |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 392 | if (!throttled) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 393 | tty_insert_flip_string(tty, buf->base, buf->size); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 394 | tty_flip_buffer_push(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 396 | if (throttled) { |
| 397 | dbg("Throttling noticed"); |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 398 | spin_lock_irqsave(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 399 | list_add(&buf->list, &acm->filled_read_bufs); |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 400 | spin_unlock_irqrestore(&acm->read_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | return; |
| 402 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 404 | spin_lock_irqsave(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 405 | list_add(&buf->list, &acm->spare_read_bufs); |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 406 | spin_unlock_irqrestore(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 407 | goto next_buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 409 | urbs: |
| 410 | while (!list_empty(&acm->spare_read_bufs)) { |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 411 | spin_lock_irqsave(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 412 | if (list_empty(&acm->spare_read_urbs)) { |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 413 | spin_unlock_irqrestore(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 414 | return; |
| 415 | } |
| 416 | rcv = list_entry(acm->spare_read_urbs.next, |
| 417 | struct acm_ru, list); |
| 418 | list_del(&rcv->list); |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 419 | spin_unlock_irqrestore(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 420 | |
| 421 | buf = list_entry(acm->spare_read_bufs.next, |
| 422 | struct acm_rb, list); |
| 423 | list_del(&buf->list); |
| 424 | |
| 425 | rcv->buffer = buf; |
| 426 | |
| 427 | usb_fill_bulk_urb(rcv->urb, acm->dev, |
| 428 | acm->rx_endpoint, |
| 429 | buf->base, |
| 430 | acm->readsize, |
| 431 | acm_read_bulk, rcv); |
| 432 | rcv->urb->transfer_dma = buf->dma; |
| 433 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 434 | |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 435 | 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] | 436 | |
| 437 | /* This shouldn't kill the driver as unsuccessful URBs are returned to the |
| 438 | free-urbs-pool and resubmited ASAP */ |
| 439 | if (usb_submit_urb(rcv->urb, GFP_ATOMIC) < 0) { |
| 440 | list_add(&buf->list, &acm->spare_read_bufs); |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 441 | spin_lock_irqsave(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 442 | list_add(&rcv->list, &acm->spare_read_urbs); |
Jarek Poplawski | 762f007 | 2006-10-06 07:23:11 +0200 | [diff] [blame] | 443 | spin_unlock_irqrestore(&acm->read_lock, flags); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 444 | return; |
| 445 | } |
| 446 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | } |
| 448 | |
| 449 | /* data interface wrote those outgoing bytes */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 450 | static void acm_write_bulk(struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | { |
| 452 | struct acm *acm = (struct acm *)urb->context; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 453 | |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 454 | dbg("Entering acm_write_bulk with status %d", urb->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 456 | acm_write_done(acm); |
| 457 | acm_write_start(acm); |
| 458 | if (ACM_READY(acm)) |
| 459 | schedule_work(&acm->work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | } |
| 461 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 462 | static void acm_softint(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 464 | struct acm *acm = container_of(work, struct acm, work); |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 465 | dbg("Entering acm_softint."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
| 467 | if (!ACM_READY(acm)) |
| 468 | return; |
| 469 | tty_wakeup(acm->tty); |
| 470 | } |
| 471 | |
| 472 | /* |
| 473 | * TTY handlers |
| 474 | */ |
| 475 | |
| 476 | static int acm_tty_open(struct tty_struct *tty, struct file *filp) |
| 477 | { |
| 478 | struct acm *acm; |
| 479 | int rv = -EINVAL; |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 480 | int i; |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 481 | dbg("Entering acm_tty_open."); |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 482 | |
| 483 | mutex_lock(&open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | |
| 485 | acm = acm_table[tty->index]; |
| 486 | if (!acm || !acm->dev) |
| 487 | goto err_out; |
| 488 | else |
| 489 | rv = 0; |
| 490 | |
| 491 | tty->driver_data = acm; |
| 492 | acm->tty = tty; |
| 493 | |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 494 | /* force low_latency on so that our tty_push actually forces the data through, |
| 495 | otherwise it is scheduled, and with high data rates data can get lost. */ |
| 496 | tty->low_latency = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | |
| 498 | if (acm->used++) { |
| 499 | goto done; |
| 500 | } |
| 501 | |
| 502 | acm->ctrlurb->dev = acm->dev; |
| 503 | if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { |
| 504 | dbg("usb_submit_urb(ctrl irq) failed"); |
| 505 | goto bail_out; |
| 506 | } |
| 507 | |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 508 | if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) && |
| 509 | (acm->ctrl_caps & USB_CDC_CAP_LINE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | goto full_bailout; |
| 511 | |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 512 | INIT_LIST_HEAD(&acm->spare_read_urbs); |
| 513 | INIT_LIST_HEAD(&acm->spare_read_bufs); |
| 514 | INIT_LIST_HEAD(&acm->filled_read_bufs); |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 515 | for (i = 0; i < acm->rx_buflimit; i++) { |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 516 | list_add(&(acm->ru[i].list), &acm->spare_read_urbs); |
| 517 | } |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 518 | for (i = 0; i < acm->rx_buflimit; i++) { |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 519 | list_add(&(acm->rb[i].list), &acm->spare_read_bufs); |
| 520 | } |
| 521 | |
Oliver Neukum | ca79b7b | 2007-02-12 08:41:35 +0100 | [diff] [blame] | 522 | acm->throttle = 0; |
| 523 | |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 524 | tasklet_schedule(&acm->urb_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | |
| 526 | done: |
| 527 | err_out: |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 528 | mutex_unlock(&open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | return rv; |
| 530 | |
| 531 | full_bailout: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | usb_kill_urb(acm->ctrlurb); |
| 533 | bail_out: |
| 534 | acm->used--; |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 535 | mutex_unlock(&open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | return -EIO; |
| 537 | } |
| 538 | |
brian@murphy.dk | 83ef344 | 2005-06-29 16:53:29 -0700 | [diff] [blame] | 539 | static void acm_tty_unregister(struct acm *acm) |
| 540 | { |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 541 | int i,nr; |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 542 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 543 | nr = acm->rx_buflimit; |
brian@murphy.dk | 83ef344 | 2005-06-29 16:53:29 -0700 | [diff] [blame] | 544 | tty_unregister_device(acm_tty_driver, acm->minor); |
| 545 | usb_put_intf(acm->control); |
| 546 | acm_table[acm->minor] = NULL; |
| 547 | usb_free_urb(acm->ctrlurb); |
brian@murphy.dk | 83ef344 | 2005-06-29 16:53:29 -0700 | [diff] [blame] | 548 | usb_free_urb(acm->writeurb); |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 549 | for (i = 0; i < nr; i++) |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 550 | usb_free_urb(acm->ru[i].urb); |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 551 | kfree(acm->country_codes); |
brian@murphy.dk | 83ef344 | 2005-06-29 16:53:29 -0700 | [diff] [blame] | 552 | kfree(acm); |
| 553 | } |
| 554 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | static void acm_tty_close(struct tty_struct *tty, struct file *filp) |
| 556 | { |
| 557 | struct acm *acm = tty->driver_data; |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 558 | int i,nr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | |
| 560 | if (!acm || !acm->used) |
| 561 | return; |
| 562 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 563 | nr = acm->rx_buflimit; |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 564 | mutex_lock(&open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | if (!--acm->used) { |
| 566 | if (acm->dev) { |
| 567 | acm_set_control(acm, acm->ctrlout = 0); |
| 568 | usb_kill_urb(acm->ctrlurb); |
| 569 | usb_kill_urb(acm->writeurb); |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 570 | for (i = 0; i < nr; i++) |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 571 | usb_kill_urb(acm->ru[i].urb); |
brian@murphy.dk | 83ef344 | 2005-06-29 16:53:29 -0700 | [diff] [blame] | 572 | } else |
| 573 | acm_tty_unregister(acm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 575 | mutex_unlock(&open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | } |
| 577 | |
| 578 | static int acm_tty_write(struct tty_struct *tty, const unsigned char *buf, int count) |
| 579 | { |
| 580 | struct acm *acm = tty->driver_data; |
| 581 | int stat; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 582 | unsigned long flags; |
| 583 | int wbn; |
| 584 | struct acm_wb *wb; |
| 585 | |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 586 | dbg("Entering acm_tty_write to write %d bytes,", count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | |
| 588 | if (!ACM_READY(acm)) |
| 589 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | if (!count) |
| 591 | return 0; |
| 592 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 593 | spin_lock_irqsave(&acm->write_lock, flags); |
| 594 | if ((wbn = acm_wb_alloc(acm)) < 0) { |
| 595 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 596 | acm_write_start(acm); |
| 597 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | } |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 599 | wb = &acm->wb[wbn]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 601 | count = (count > acm->writesize) ? acm->writesize : count; |
| 602 | dbg("Get %d bytes...", count); |
| 603 | memcpy(wb->buf, buf, count); |
| 604 | wb->len = count; |
| 605 | spin_unlock_irqrestore(&acm->write_lock, flags); |
| 606 | |
| 607 | if ((stat = acm_write_start(acm)) < 0) |
| 608 | return stat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | return count; |
| 610 | } |
| 611 | |
| 612 | static int acm_tty_write_room(struct tty_struct *tty) |
| 613 | { |
| 614 | struct acm *acm = tty->driver_data; |
| 615 | if (!ACM_READY(acm)) |
| 616 | return -EINVAL; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 617 | /* |
| 618 | * Do not let the line discipline to know that we have a reserve, |
| 619 | * or it might get too enthusiastic. |
| 620 | */ |
| 621 | return (acm->write_ready && acm_wb_is_avail(acm)) ? acm->writesize : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | } |
| 623 | |
| 624 | static int acm_tty_chars_in_buffer(struct tty_struct *tty) |
| 625 | { |
| 626 | struct acm *acm = tty->driver_data; |
| 627 | if (!ACM_READY(acm)) |
| 628 | return -EINVAL; |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 629 | /* |
| 630 | * This is inaccurate (overcounts), but it works. |
| 631 | */ |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 632 | return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | } |
| 634 | |
| 635 | static void acm_tty_throttle(struct tty_struct *tty) |
| 636 | { |
| 637 | struct acm *acm = tty->driver_data; |
| 638 | if (!ACM_READY(acm)) |
| 639 | return; |
| 640 | spin_lock_bh(&acm->throttle_lock); |
| 641 | acm->throttle = 1; |
| 642 | spin_unlock_bh(&acm->throttle_lock); |
| 643 | } |
| 644 | |
| 645 | static void acm_tty_unthrottle(struct tty_struct *tty) |
| 646 | { |
| 647 | struct acm *acm = tty->driver_data; |
| 648 | if (!ACM_READY(acm)) |
| 649 | return; |
| 650 | spin_lock_bh(&acm->throttle_lock); |
| 651 | acm->throttle = 0; |
| 652 | spin_unlock_bh(&acm->throttle_lock); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 653 | tasklet_schedule(&acm->urb_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | } |
| 655 | |
| 656 | static void acm_tty_break_ctl(struct tty_struct *tty, int state) |
| 657 | { |
| 658 | struct acm *acm = tty->driver_data; |
| 659 | if (!ACM_READY(acm)) |
| 660 | return; |
| 661 | if (acm_send_break(acm, state ? 0xffff : 0)) |
| 662 | dbg("send break failed"); |
| 663 | } |
| 664 | |
| 665 | static int acm_tty_tiocmget(struct tty_struct *tty, struct file *file) |
| 666 | { |
| 667 | struct acm *acm = tty->driver_data; |
| 668 | |
| 669 | if (!ACM_READY(acm)) |
| 670 | return -EINVAL; |
| 671 | |
| 672 | return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | |
| 673 | (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | |
| 674 | (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | |
| 675 | (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | |
| 676 | (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | |
| 677 | TIOCM_CTS; |
| 678 | } |
| 679 | |
| 680 | static int acm_tty_tiocmset(struct tty_struct *tty, struct file *file, |
| 681 | unsigned int set, unsigned int clear) |
| 682 | { |
| 683 | struct acm *acm = tty->driver_data; |
| 684 | unsigned int newctrl; |
| 685 | |
| 686 | if (!ACM_READY(acm)) |
| 687 | return -EINVAL; |
| 688 | |
| 689 | newctrl = acm->ctrlout; |
| 690 | set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); |
| 691 | clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); |
| 692 | |
| 693 | newctrl = (newctrl & ~clear) | set; |
| 694 | |
| 695 | if (acm->ctrlout == newctrl) |
| 696 | return 0; |
| 697 | return acm_set_control(acm, acm->ctrlout = newctrl); |
| 698 | } |
| 699 | |
| 700 | static int acm_tty_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) |
| 701 | { |
| 702 | struct acm *acm = tty->driver_data; |
| 703 | |
| 704 | if (!ACM_READY(acm)) |
| 705 | return -EINVAL; |
| 706 | |
| 707 | return -ENOIOCTLCMD; |
| 708 | } |
| 709 | |
Arjan van de Ven | 4c4c943 | 2005-11-29 09:43:42 +0100 | [diff] [blame] | 710 | static const __u32 acm_tty_speed[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | 0, 50, 75, 110, 134, 150, 200, 300, 600, |
| 712 | 1200, 1800, 2400, 4800, 9600, 19200, 38400, |
| 713 | 57600, 115200, 230400, 460800, 500000, 576000, |
| 714 | 921600, 1000000, 1152000, 1500000, 2000000, |
| 715 | 2500000, 3000000, 3500000, 4000000 |
| 716 | }; |
| 717 | |
Arjan van de Ven | 4c4c943 | 2005-11-29 09:43:42 +0100 | [diff] [blame] | 718 | static const __u8 acm_tty_size[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | 5, 6, 7, 8 |
| 720 | }; |
| 721 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 722 | static void acm_tty_set_termios(struct tty_struct *tty, struct ktermios *termios_old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | { |
| 724 | struct acm *acm = tty->driver_data; |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 725 | struct ktermios *termios = tty->termios; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | struct usb_cdc_line_coding newline; |
| 727 | int newctrl = acm->ctrlout; |
| 728 | |
| 729 | if (!ACM_READY(acm)) |
| 730 | return; |
| 731 | |
| 732 | newline.dwDTERate = cpu_to_le32p(acm_tty_speed + |
| 733 | (termios->c_cflag & CBAUD & ~CBAUDEX) + (termios->c_cflag & CBAUDEX ? 15 : 0)); |
| 734 | newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; |
| 735 | newline.bParityType = termios->c_cflag & PARENB ? |
| 736 | (termios->c_cflag & PARODD ? 1 : 2) + (termios->c_cflag & CMSPAR ? 2 : 0) : 0; |
| 737 | newline.bDataBits = acm_tty_size[(termios->c_cflag & CSIZE) >> 4]; |
| 738 | |
| 739 | acm->clocal = ((termios->c_cflag & CLOCAL) != 0); |
| 740 | |
| 741 | if (!newline.dwDTERate) { |
| 742 | newline.dwDTERate = acm->line.dwDTERate; |
| 743 | newctrl &= ~ACM_CTRL_DTR; |
| 744 | } else newctrl |= ACM_CTRL_DTR; |
| 745 | |
| 746 | if (newctrl != acm->ctrlout) |
| 747 | acm_set_control(acm, acm->ctrlout = newctrl); |
| 748 | |
| 749 | if (memcmp(&acm->line, &newline, sizeof newline)) { |
| 750 | memcpy(&acm->line, &newline, sizeof newline); |
| 751 | dbg("set line: %d %d %d %d", le32_to_cpu(newline.dwDTERate), |
| 752 | newline.bCharFormat, newline.bParityType, |
| 753 | newline.bDataBits); |
| 754 | acm_set_line(acm, &acm->line); |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | /* |
| 759 | * USB probe and disconnect routines. |
| 760 | */ |
| 761 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 762 | /* Little helper: write buffers free */ |
| 763 | static void acm_write_buffers_free(struct acm *acm) |
| 764 | { |
| 765 | int i; |
| 766 | struct acm_wb *wb; |
| 767 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 768 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 769 | usb_buffer_free(acm->dev, acm->writesize, wb->buf, wb->dmah); |
| 770 | } |
| 771 | } |
| 772 | |
| 773 | /* Little helper: write buffers allocate */ |
| 774 | static int acm_write_buffers_alloc(struct acm *acm) |
| 775 | { |
| 776 | int i; |
| 777 | struct acm_wb *wb; |
| 778 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 779 | for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 780 | wb->buf = usb_buffer_alloc(acm->dev, acm->writesize, GFP_KERNEL, |
| 781 | &wb->dmah); |
| 782 | if (!wb->buf) { |
| 783 | while (i != 0) { |
| 784 | --i; |
| 785 | --wb; |
| 786 | usb_buffer_free(acm->dev, acm->writesize, |
| 787 | wb->buf, wb->dmah); |
| 788 | } |
| 789 | return -ENOMEM; |
| 790 | } |
| 791 | } |
| 792 | return 0; |
| 793 | } |
| 794 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | static int acm_probe (struct usb_interface *intf, |
| 796 | const struct usb_device_id *id) |
| 797 | { |
| 798 | struct usb_cdc_union_desc *union_header = NULL; |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 799 | struct usb_cdc_country_functional_desc *cfd = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | char *buffer = intf->altsetting->extra; |
| 801 | int buflen = intf->altsetting->extralen; |
| 802 | struct usb_interface *control_interface; |
| 803 | struct usb_interface *data_interface; |
| 804 | struct usb_endpoint_descriptor *epctrl; |
| 805 | struct usb_endpoint_descriptor *epread; |
| 806 | struct usb_endpoint_descriptor *epwrite; |
| 807 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
| 808 | struct acm *acm; |
| 809 | int minor; |
| 810 | int ctrlsize,readsize; |
| 811 | u8 *buf; |
| 812 | u8 ac_management_function = 0; |
| 813 | u8 call_management_function = 0; |
| 814 | int call_interface_num = -1; |
| 815 | int data_interface_num; |
| 816 | unsigned long quirks; |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 817 | int num_rx_buf; |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 818 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 820 | /* normal quirks */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | quirks = (unsigned long)id->driver_info; |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 822 | num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; |
| 823 | |
| 824 | /* handle quirks deadly to normal probing*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | if (quirks == NO_UNION_NORMAL) { |
| 826 | data_interface = usb_ifnum_to_if(usb_dev, 1); |
| 827 | control_interface = usb_ifnum_to_if(usb_dev, 0); |
| 828 | goto skip_normal_probe; |
| 829 | } |
| 830 | |
| 831 | /* normal probing*/ |
| 832 | if (!buffer) { |
| 833 | err("Wierd descriptor references\n"); |
| 834 | return -EINVAL; |
| 835 | } |
| 836 | |
| 837 | if (!buflen) { |
| 838 | if (intf->cur_altsetting->endpoint->extralen && intf->cur_altsetting->endpoint->extra) { |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 839 | dev_dbg(&intf->dev,"Seeking extra descriptors on endpoint"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | buflen = intf->cur_altsetting->endpoint->extralen; |
| 841 | buffer = intf->cur_altsetting->endpoint->extra; |
| 842 | } else { |
| 843 | err("Zero length descriptor references\n"); |
| 844 | return -EINVAL; |
| 845 | } |
| 846 | } |
| 847 | |
| 848 | while (buflen > 0) { |
| 849 | if (buffer [1] != USB_DT_CS_INTERFACE) { |
| 850 | err("skipping garbage\n"); |
| 851 | goto next_desc; |
| 852 | } |
| 853 | |
| 854 | switch (buffer [2]) { |
| 855 | case USB_CDC_UNION_TYPE: /* we've found it */ |
| 856 | if (union_header) { |
| 857 | err("More than one union descriptor, skipping ..."); |
| 858 | goto next_desc; |
| 859 | } |
| 860 | union_header = (struct usb_cdc_union_desc *) |
| 861 | buffer; |
| 862 | break; |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 863 | case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/ |
| 864 | cfd = (struct usb_cdc_country_functional_desc *)buffer; |
| 865 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | case USB_CDC_HEADER_TYPE: /* maybe check version */ |
| 867 | break; /* for now we ignore it */ |
| 868 | case USB_CDC_ACM_TYPE: |
| 869 | ac_management_function = buffer[3]; |
| 870 | break; |
| 871 | case USB_CDC_CALL_MANAGEMENT_TYPE: |
| 872 | call_management_function = buffer[3]; |
| 873 | call_interface_num = buffer[4]; |
| 874 | if ((call_management_function & 3) != 3) |
| 875 | err("This device cannot do calls on its own. It is no modem."); |
| 876 | break; |
| 877 | |
| 878 | default: |
| 879 | err("Ignoring extra header, type %d, length %d", buffer[2], buffer[0]); |
| 880 | break; |
| 881 | } |
| 882 | next_desc: |
| 883 | buflen -= buffer[0]; |
| 884 | buffer += buffer[0]; |
| 885 | } |
| 886 | |
| 887 | if (!union_header) { |
| 888 | if (call_interface_num > 0) { |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 889 | dev_dbg(&intf->dev,"No union descriptor, using call management descriptor"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num)); |
| 891 | control_interface = intf; |
| 892 | } else { |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 893 | dev_dbg(&intf->dev,"No union descriptor, giving up"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | return -ENODEV; |
| 895 | } |
| 896 | } else { |
| 897 | control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); |
| 898 | data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0)); |
| 899 | if (!control_interface || !data_interface) { |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 900 | dev_dbg(&intf->dev,"no interfaces"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | return -ENODEV; |
| 902 | } |
| 903 | } |
| 904 | |
| 905 | if (data_interface_num != call_interface_num) |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 906 | dev_dbg(&intf->dev,"Seperate call control interface. That is not fully supported."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | |
| 908 | skip_normal_probe: |
| 909 | |
| 910 | /*workaround for switched interfaces */ |
| 911 | if (data_interface->cur_altsetting->desc.bInterfaceClass != CDC_DATA_INTERFACE_TYPE) { |
| 912 | if (control_interface->cur_altsetting->desc.bInterfaceClass == CDC_DATA_INTERFACE_TYPE) { |
| 913 | struct usb_interface *t; |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 914 | dev_dbg(&intf->dev,"Your device has switched interfaces."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | |
| 916 | t = control_interface; |
| 917 | control_interface = data_interface; |
| 918 | data_interface = t; |
| 919 | } else { |
| 920 | return -EINVAL; |
| 921 | } |
| 922 | } |
| 923 | |
| 924 | if (usb_interface_claimed(data_interface)) { /* valid in this context */ |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 925 | dev_dbg(&intf->dev,"The data interface isn't available"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | return -EBUSY; |
| 927 | } |
| 928 | |
| 929 | |
| 930 | if (data_interface->cur_altsetting->desc.bNumEndpoints < 2) |
| 931 | return -EINVAL; |
| 932 | |
| 933 | epctrl = &control_interface->cur_altsetting->endpoint[0].desc; |
| 934 | epread = &data_interface->cur_altsetting->endpoint[0].desc; |
| 935 | epwrite = &data_interface->cur_altsetting->endpoint[1].desc; |
| 936 | |
| 937 | |
| 938 | /* workaround for switched endpoints */ |
Luiz Fernando N. Capitulino | 45aea70 | 2006-10-26 13:02:48 -0300 | [diff] [blame] | 939 | if (!usb_endpoint_dir_in(epread)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | /* descriptors are swapped */ |
| 941 | struct usb_endpoint_descriptor *t; |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 942 | dev_dbg(&intf->dev,"The data interface has switched endpoints"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
| 944 | t = epread; |
| 945 | epread = epwrite; |
| 946 | epwrite = t; |
| 947 | } |
| 948 | dbg("interfaces are valid"); |
| 949 | for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++); |
| 950 | |
| 951 | if (minor == ACM_TTY_MINORS) { |
| 952 | err("no more free acm devices"); |
| 953 | return -ENODEV; |
| 954 | } |
| 955 | |
Oliver Neukum | 46f116e | 2005-10-24 22:42:35 +0200 | [diff] [blame] | 956 | if (!(acm = kzalloc(sizeof(struct acm), GFP_KERNEL))) { |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 957 | dev_dbg(&intf->dev, "out of memory (acm kzalloc)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | goto alloc_fail; |
| 959 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | |
| 961 | ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize); |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 962 | readsize = le16_to_cpu(epread->wMaxPacketSize)* ( quirks == SINGLE_RX_URB ? 1 : 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize); |
| 964 | acm->control = control_interface; |
| 965 | acm->data = data_interface; |
| 966 | acm->minor = minor; |
| 967 | acm->dev = usb_dev; |
| 968 | acm->ctrl_caps = ac_management_function; |
| 969 | acm->ctrlsize = ctrlsize; |
| 970 | acm->readsize = readsize; |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 971 | acm->rx_buflimit = num_rx_buf; |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 972 | acm->urb_task.func = acm_rx_tasklet; |
| 973 | acm->urb_task.data = (unsigned long) acm; |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 974 | INIT_WORK(&acm->work, acm_softint); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | spin_lock_init(&acm->throttle_lock); |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 976 | spin_lock_init(&acm->write_lock); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 977 | spin_lock_init(&acm->read_lock); |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 978 | acm->write_ready = 1; |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 979 | acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | |
| 981 | buf = usb_buffer_alloc(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); |
| 982 | if (!buf) { |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 983 | dev_dbg(&intf->dev, "out of memory (ctrl buffer alloc)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | goto alloc_fail2; |
| 985 | } |
| 986 | acm->ctrl_buffer = buf; |
| 987 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 988 | if (acm_write_buffers_alloc(acm) < 0) { |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 989 | dev_dbg(&intf->dev, "out of memory (write buffer alloc)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | goto alloc_fail4; |
| 991 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | |
| 993 | acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); |
| 994 | if (!acm->ctrlurb) { |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 995 | dev_dbg(&intf->dev, "out of memory (ctrlurb kmalloc)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | goto alloc_fail5; |
| 997 | } |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 998 | for (i = 0; i < num_rx_buf; i++) { |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 999 | struct acm_ru *rcv = &(acm->ru[i]); |
| 1000 | |
| 1001 | if (!(rcv->urb = usb_alloc_urb(0, GFP_KERNEL))) { |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 1002 | dev_dbg(&intf->dev, "out of memory (read urbs usb_alloc_urb)"); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1003 | goto alloc_fail7; |
| 1004 | } |
| 1005 | |
| 1006 | rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 1007 | rcv->instance = acm; |
| 1008 | } |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 1009 | for (i = 0; i < num_rx_buf; i++) { |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1010 | struct acm_rb *buf = &(acm->rb[i]); |
| 1011 | |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1012 | if (!(buf->base = usb_buffer_alloc(acm->dev, readsize, GFP_KERNEL, &buf->dma))) { |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 1013 | dev_dbg(&intf->dev, "out of memory (read bufs usb_buffer_alloc)"); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1014 | goto alloc_fail7; |
| 1015 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | } |
| 1017 | acm->writeurb = usb_alloc_urb(0, GFP_KERNEL); |
| 1018 | if (!acm->writeurb) { |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 1019 | dev_dbg(&intf->dev, "out of memory (writeurb kmalloc)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | goto alloc_fail7; |
| 1021 | } |
| 1022 | |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 1023 | usb_set_intfdata (intf, acm); |
| 1024 | |
| 1025 | i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); |
| 1026 | if (i < 0) |
| 1027 | goto alloc_fail8; |
| 1028 | |
| 1029 | if (cfd) { /* export the country data */ |
| 1030 | acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); |
| 1031 | if (!acm->country_codes) |
| 1032 | goto skip_countries; |
| 1033 | acm->country_code_size = cfd->bLength - 4; |
| 1034 | memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, cfd->bLength - 4); |
| 1035 | acm->country_rel_date = cfd->iCountryCodeRelDate; |
| 1036 | |
| 1037 | i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); |
| 1038 | if (i < 0) { |
| 1039 | kfree(acm->country_codes); |
| 1040 | goto skip_countries; |
| 1041 | } |
| 1042 | |
| 1043 | i = device_create_file(&intf->dev, &dev_attr_iCountryCodeRelDate); |
| 1044 | if (i < 0) { |
| 1045 | kfree(acm->country_codes); |
| 1046 | goto skip_countries; |
| 1047 | } |
| 1048 | } |
| 1049 | |
| 1050 | skip_countries: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | usb_fill_int_urb(acm->ctrlurb, usb_dev, usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), |
| 1052 | acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, epctrl->bInterval); |
| 1053 | acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 1054 | acm->ctrlurb->transfer_dma = acm->ctrl_dma; |
| 1055 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | usb_fill_bulk_urb(acm->writeurb, usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 1057 | NULL, acm->writesize, acm_write_bulk, acm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | acm->writeurb->transfer_flags |= URB_NO_FSBR | URB_NO_TRANSFER_DMA_MAP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | |
| 1060 | dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); |
| 1061 | |
| 1062 | acm_set_control(acm, acm->ctrlout); |
| 1063 | |
| 1064 | acm->line.dwDTERate = cpu_to_le32(9600); |
| 1065 | acm->line.bDataBits = 8; |
| 1066 | acm_set_line(acm, &acm->line); |
| 1067 | |
| 1068 | usb_driver_claim_interface(&acm_driver, data_interface, acm); |
| 1069 | |
brian@murphy.dk | 83ef344 | 2005-06-29 16:53:29 -0700 | [diff] [blame] | 1070 | usb_get_intf(control_interface); |
| 1071 | tty_register_device(acm_tty_driver, minor, &control_interface->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | |
| 1073 | acm_table[minor] = acm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 1075 | return 0; |
| 1076 | alloc_fail8: |
| 1077 | usb_free_urb(acm->writeurb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | alloc_fail7: |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 1079 | for (i = 0; i < num_rx_buf; i++) |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1080 | usb_buffer_free(usb_dev, acm->readsize, acm->rb[i].base, acm->rb[i].dma); |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 1081 | for (i = 0; i < num_rx_buf; i++) |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1082 | usb_free_urb(acm->ru[i].urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | usb_free_urb(acm->ctrlurb); |
| 1084 | alloc_fail5: |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 1085 | acm_write_buffers_free(acm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | alloc_fail4: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | usb_buffer_free(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
| 1088 | alloc_fail2: |
| 1089 | kfree(acm); |
| 1090 | alloc_fail: |
| 1091 | return -ENOMEM; |
| 1092 | } |
| 1093 | |
| 1094 | static void acm_disconnect(struct usb_interface *intf) |
| 1095 | { |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 1096 | struct acm *acm = usb_get_intfdata(intf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1098 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | |
| 1100 | if (!acm || !acm->dev) { |
| 1101 | dbg("disconnect on nonexisting interface"); |
| 1102 | return; |
| 1103 | } |
| 1104 | |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 1105 | mutex_lock(&open_mutex); |
Oliver Neukum | 86067eea | 2006-01-08 12:39:13 +0100 | [diff] [blame] | 1106 | if (!usb_get_intfdata(intf)) { |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 1107 | mutex_unlock(&open_mutex); |
Oliver Neukum | 86067eea | 2006-01-08 12:39:13 +0100 | [diff] [blame] | 1108 | return; |
| 1109 | } |
Oliver Neukum | c4cabd2 | 2007-02-27 15:28:55 +0100 | [diff] [blame] | 1110 | if (acm->country_codes){ |
| 1111 | device_remove_file(&intf->dev, &dev_attr_wCountryCodes); |
| 1112 | device_remove_file(&intf->dev, &dev_attr_iCountryCodeRelDate); |
| 1113 | } |
| 1114 | device_remove_file(&intf->dev, &dev_attr_bmCapabilities); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | acm->dev = NULL; |
Oliver Neukum | 86067eea | 2006-01-08 12:39:13 +0100 | [diff] [blame] | 1116 | usb_set_intfdata(acm->control, NULL); |
| 1117 | usb_set_intfdata(acm->data, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1119 | tasklet_disable(&acm->urb_task); |
| 1120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | usb_kill_urb(acm->ctrlurb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | usb_kill_urb(acm->writeurb); |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 1123 | for (i = 0; i < acm->rx_buflimit; i++) |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1124 | usb_kill_urb(acm->ru[i].urb); |
| 1125 | |
| 1126 | INIT_LIST_HEAD(&acm->filled_read_bufs); |
| 1127 | INIT_LIST_HEAD(&acm->spare_read_bufs); |
| 1128 | |
| 1129 | tasklet_enable(&acm->urb_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | |
| 1131 | flush_scheduled_work(); /* wait for acm_softint */ |
| 1132 | |
Oliver Neukum | 884b600 | 2005-04-21 21:28:02 +0200 | [diff] [blame] | 1133 | acm_write_buffers_free(acm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | usb_buffer_free(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 1135 | for (i = 0; i < acm->rx_buflimit; i++) |
David Kubicek | 61a87ad | 2005-11-01 18:51:34 +0100 | [diff] [blame] | 1136 | usb_buffer_free(usb_dev, acm->readsize, acm->rb[i].base, acm->rb[i].dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | |
Oliver Neukum | 86067eea | 2006-01-08 12:39:13 +0100 | [diff] [blame] | 1138 | usb_driver_release_interface(&acm_driver, intf == acm->control ? acm->data : intf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | |
| 1140 | if (!acm->used) { |
brian@murphy.dk | 83ef344 | 2005-06-29 16:53:29 -0700 | [diff] [blame] | 1141 | acm_tty_unregister(acm); |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 1142 | mutex_unlock(&open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | return; |
| 1144 | } |
| 1145 | |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 1146 | mutex_unlock(&open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | |
| 1148 | if (acm->tty) |
| 1149 | tty_hangup(acm->tty); |
| 1150 | } |
| 1151 | |
| 1152 | /* |
| 1153 | * USB driver structure. |
| 1154 | */ |
| 1155 | |
| 1156 | static struct usb_device_id acm_ids[] = { |
| 1157 | /* quirky and broken devices */ |
| 1158 | { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ |
| 1159 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1160 | }, |
Masahito Omote | 8753e65 | 2005-07-29 12:17:25 -0700 | [diff] [blame] | 1161 | { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ |
| 1162 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1163 | }, |
Chris Malley | 91a9c92 | 2006-10-03 10:08:28 +0100 | [diff] [blame] | 1164 | { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ |
| 1165 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1166 | }, |
Oliver Neukum | 8647894 | 2006-05-13 22:50:47 +0200 | [diff] [blame] | 1167 | { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ |
| 1168 | .driver_info = SINGLE_RX_URB, /* firmware bug */ |
| 1169 | }, |
Oliver Neukum | 3dd2ae8 | 2006-06-23 09:14:17 +0200 | [diff] [blame] | 1170 | { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ |
| 1171 | .driver_info = SINGLE_RX_URB, /* firmware bug */ |
| 1172 | }, |
Oliver Neukum | 9be8456 | 2007-02-12 08:50:03 +0100 | [diff] [blame] | 1173 | { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ |
| 1174 | .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ |
| 1175 | }, |
| 1176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | /* control interfaces with various AT-command sets */ |
| 1178 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1179 | USB_CDC_ACM_PROTO_AT_V25TER) }, |
| 1180 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1181 | USB_CDC_ACM_PROTO_AT_PCCA101) }, |
| 1182 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1183 | USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, |
| 1184 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1185 | USB_CDC_ACM_PROTO_AT_GSM) }, |
| 1186 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1187 | USB_CDC_ACM_PROTO_AT_3G ) }, |
| 1188 | { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| 1189 | USB_CDC_ACM_PROTO_AT_CDMA) }, |
| 1190 | |
| 1191 | /* NOTE: COMM/ACM/0xff is likely MSFT RNDIS ... NOT a modem!! */ |
| 1192 | { } |
| 1193 | }; |
| 1194 | |
| 1195 | MODULE_DEVICE_TABLE (usb, acm_ids); |
| 1196 | |
| 1197 | static struct usb_driver acm_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | .name = "cdc_acm", |
| 1199 | .probe = acm_probe, |
| 1200 | .disconnect = acm_disconnect, |
| 1201 | .id_table = acm_ids, |
| 1202 | }; |
| 1203 | |
| 1204 | /* |
| 1205 | * TTY driver structures. |
| 1206 | */ |
| 1207 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 1208 | static const struct tty_operations acm_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | .open = acm_tty_open, |
| 1210 | .close = acm_tty_close, |
| 1211 | .write = acm_tty_write, |
| 1212 | .write_room = acm_tty_write_room, |
| 1213 | .ioctl = acm_tty_ioctl, |
| 1214 | .throttle = acm_tty_throttle, |
| 1215 | .unthrottle = acm_tty_unthrottle, |
| 1216 | .chars_in_buffer = acm_tty_chars_in_buffer, |
| 1217 | .break_ctl = acm_tty_break_ctl, |
| 1218 | .set_termios = acm_tty_set_termios, |
| 1219 | .tiocmget = acm_tty_tiocmget, |
| 1220 | .tiocmset = acm_tty_tiocmset, |
| 1221 | }; |
| 1222 | |
| 1223 | /* |
| 1224 | * Init / exit. |
| 1225 | */ |
| 1226 | |
| 1227 | static int __init acm_init(void) |
| 1228 | { |
| 1229 | int retval; |
| 1230 | acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); |
| 1231 | if (!acm_tty_driver) |
| 1232 | return -ENOMEM; |
| 1233 | acm_tty_driver->owner = THIS_MODULE, |
| 1234 | acm_tty_driver->driver_name = "acm", |
| 1235 | acm_tty_driver->name = "ttyACM", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | acm_tty_driver->major = ACM_TTY_MAJOR, |
| 1237 | acm_tty_driver->minor_start = 0, |
| 1238 | acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, |
| 1239 | acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, |
Greg Kroah-Hartman | 331b831 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1240 | acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | acm_tty_driver->init_termios = tty_std_termios; |
| 1242 | acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| 1243 | tty_set_operations(acm_tty_driver, &acm_ops); |
| 1244 | |
| 1245 | retval = tty_register_driver(acm_tty_driver); |
| 1246 | if (retval) { |
| 1247 | put_tty_driver(acm_tty_driver); |
| 1248 | return retval; |
| 1249 | } |
| 1250 | |
| 1251 | retval = usb_register(&acm_driver); |
| 1252 | if (retval) { |
| 1253 | tty_unregister_driver(acm_tty_driver); |
| 1254 | put_tty_driver(acm_tty_driver); |
| 1255 | return retval; |
| 1256 | } |
| 1257 | |
| 1258 | info(DRIVER_VERSION ":" DRIVER_DESC); |
| 1259 | |
| 1260 | return 0; |
| 1261 | } |
| 1262 | |
| 1263 | static void __exit acm_exit(void) |
| 1264 | { |
| 1265 | usb_deregister(&acm_driver); |
| 1266 | tty_unregister_driver(acm_tty_driver); |
| 1267 | put_tty_driver(acm_tty_driver); |
| 1268 | } |
| 1269 | |
| 1270 | module_init(acm_init); |
| 1271 | module_exit(acm_exit); |
| 1272 | |
| 1273 | MODULE_AUTHOR( DRIVER_AUTHOR ); |
| 1274 | MODULE_DESCRIPTION( DRIVER_DESC ); |
| 1275 | MODULE_LICENSE("GPL"); |
| 1276 | |