1 /* 2 USB Driver for Sierra Wireless 3 4 Copyright (C) 2006, 2007, 2008 Kevin Lloyd <klloyd@sierrawireless.com>, 5 6 Copyright (C) 2008, 2009 Elina Pasheva, Matthew Safar, Rory Filer 7 <linux@sierrawireless.com> 8 9 IMPORTANT DISCLAIMER: This driver is not commercially supported by 10 Sierra Wireless. Use at your own risk. 11 12 This driver is free software; you can redistribute it and/or modify 13 it under the terms of Version 2 of the GNU General Public License as 14 published by the Free Software Foundation. 15 16 Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de> 17 Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org> 18 */ 19 20 #define DRIVER_VERSION "v.1.3.7" 21 #define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer" 22 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems" 23 24 #include <linux/kernel.h> 25 #include <linux/jiffies.h> 26 #include <linux/errno.h> 27 #include <linux/tty.h> 28 #include <linux/tty_flip.h> 29 #include <linux/module.h> 30 #include <linux/usb.h> 31 #include <linux/usb/serial.h> 32 33 #define SWIMS_USB_REQUEST_SetPower 0x00 34 #define SWIMS_USB_REQUEST_SetNmea 0x07 35 36 #define N_IN_URB 8 37 #define N_OUT_URB 64 38 #define IN_BUFLEN 4096 39 40 #define MAX_TRANSFER (PAGE_SIZE - 512) 41 /* MAX_TRANSFER is chosen so that the VM is not stressed by 42 allocations > PAGE_SIZE and the number of packets in a page 43 is an integer 512 is the largest possible packet on EHCI */ 44 45 static int debug; 46 static int nmea; 47 48 /* Used in interface blacklisting */ 49 struct sierra_iface_info { 50 const u32 infolen; /* number of interface numbers on blacklist */ 51 const u8 *ifaceinfo; /* pointer to the array holding the numbers */ 52 }; 53 54 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState) 55 { 56 int result; 57 dev_dbg(&udev->dev, "%s\n", __func__); 58 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 59 SWIMS_USB_REQUEST_SetPower, /* __u8 request */ 60 USB_TYPE_VENDOR, /* __u8 request type */ 61 swiState, /* __u16 value */ 62 0, /* __u16 index */ 63 NULL, /* void *data */ 64 0, /* __u16 size */ 65 USB_CTRL_SET_TIMEOUT); /* int timeout */ 66 return result; 67 } 68 69 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable) 70 { 71 int result; 72 dev_dbg(&udev->dev, "%s\n", __func__); 73 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 74 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */ 75 USB_TYPE_VENDOR, /* __u8 request type */ 76 enable, /* __u16 value */ 77 0x0000, /* __u16 index */ 78 NULL, /* void *data */ 79 0, /* __u16 size */ 80 USB_CTRL_SET_TIMEOUT); /* int timeout */ 81 return result; 82 } 83 84 static int sierra_calc_num_ports(struct usb_serial *serial) 85 { 86 int num_ports = 0; 87 u8 ifnum, numendpoints; 88 89 dev_dbg(&serial->dev->dev, "%s\n", __func__); 90 91 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber; 92 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints; 93 94 /* Dummy interface present on some SKUs should be ignored */ 95 if (ifnum == 0x99) 96 num_ports = 0; 97 else if (numendpoints <= 3) 98 num_ports = 1; 99 else 100 num_ports = (numendpoints-1)/2; 101 return num_ports; 102 } 103 104 static int is_blacklisted(const u8 ifnum, 105 const struct sierra_iface_info *blacklist) 106 { 107 const u8 *info; 108 int i; 109 110 if (blacklist) { 111 info = blacklist->ifaceinfo; 112 113 for (i = 0; i < blacklist->infolen; i++) { 114 if (info[i] == ifnum) 115 return 1; 116 } 117 } 118 return 0; 119 } 120 121 static int sierra_calc_interface(struct usb_serial *serial) 122 { 123 int interface; 124 struct usb_interface *p_interface; 125 struct usb_host_interface *p_host_interface; 126 dev_dbg(&serial->dev->dev, "%s\n", __func__); 127 128 /* Get the interface structure pointer from the serial struct */ 129 p_interface = serial->interface; 130 131 /* Get a pointer to the host interface structure */ 132 p_host_interface = p_interface->cur_altsetting; 133 134 /* read the interface descriptor for this active altsetting 135 * to find out the interface number we are on 136 */ 137 interface = p_host_interface->desc.bInterfaceNumber; 138 139 return interface; 140 } 141 142 static int sierra_probe(struct usb_serial *serial, 143 const struct usb_device_id *id) 144 { 145 int result = 0; 146 struct usb_device *udev; 147 u8 ifnum; 148 149 udev = serial->dev; 150 dev_dbg(&udev->dev, "%s\n", __func__); 151 152 ifnum = sierra_calc_interface(serial); 153 /* 154 * If this interface supports more than 1 alternate 155 * select the 2nd one 156 */ 157 if (serial->interface->num_altsetting == 2) { 158 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n", 159 ifnum); 160 /* We know the alternate setting is 1 for the MC8785 */ 161 usb_set_interface(udev, ifnum, 1); 162 } 163 164 /* ifnum could have changed - by calling usb_set_interface */ 165 ifnum = sierra_calc_interface(serial); 166 167 if (is_blacklisted(ifnum, 168 (struct sierra_iface_info *)id->driver_info)) { 169 dev_dbg(&serial->dev->dev, 170 "Ignoring blacklisted interface #%d\n", ifnum); 171 return -ENODEV; 172 } 173 174 return result; 175 } 176 177 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11 }; 178 static const struct sierra_iface_info direct_ip_interface_blacklist = { 179 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces), 180 .ifaceinfo = direct_ip_non_serial_ifaces, 181 }; 182 183 static struct usb_device_id id_table [] = { 184 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */ 185 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */ 186 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */ 187 188 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */ 189 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */ 190 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */ 191 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */ 192 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */ 193 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */ 194 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */ 195 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */ 196 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */ 197 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */ 198 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */ 199 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */ 200 /* Sierra Wireless C597 */ 201 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) }, 202 /* Sierra Wireless T598 */ 203 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) }, 204 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */ 205 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */ 206 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */ 207 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */ 208 209 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */ 210 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */ 211 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */ 212 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */ 213 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */ 214 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */ 215 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */ 216 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */ 217 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */ 218 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */ 219 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */ 220 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */ 221 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */ 222 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */ 223 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */ 224 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */ 225 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */ 226 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */ 227 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */ 228 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */ 229 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */ 230 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */ 231 { USB_DEVICE(0x1199, 0x683C) }, 232 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */ 233 /* Sierra Wireless MC8790, MC8791, MC8792 */ 234 { USB_DEVICE(0x1199, 0x683E) }, 235 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */ 236 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */ 237 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */ 238 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */ 239 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */ 240 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */ 241 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */ 242 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */ 243 /* Sierra Wireless C885 */ 244 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)}, 245 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */ 246 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)}, 247 /* Sierra Wireless C22/C33 */ 248 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)}, 249 /* Sierra Wireless HSPA Non-Composite Device */ 250 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)}, 251 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */ 252 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */ 253 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist 254 }, 255 256 { } 257 }; 258 MODULE_DEVICE_TABLE(usb, id_table); 259 260 static struct usb_driver sierra_driver = { 261 .name = "sierra", 262 .probe = usb_serial_probe, 263 .disconnect = usb_serial_disconnect, 264 .id_table = id_table, 265 .no_dynamic_id = 1, 266 }; 267 268 struct sierra_port_private { 269 spinlock_t lock; /* lock the structure */ 270 int outstanding_urbs; /* number of out urbs in flight */ 271 272 /* Input endpoints and buffers for this port */ 273 struct urb *in_urbs[N_IN_URB]; 274 275 /* Settings for the port */ 276 int rts_state; /* Handshaking pins (outputs) */ 277 int dtr_state; 278 int cts_state; /* Handshaking pins (inputs) */ 279 int dsr_state; 280 int dcd_state; 281 int ri_state; 282 }; 283 284 static int sierra_send_setup(struct usb_serial_port *port) 285 { 286 struct usb_serial *serial = port->serial; 287 struct sierra_port_private *portdata; 288 __u16 interface = 0; 289 int val = 0; 290 291 dev_dbg(&port->dev, "%s\n", __func__); 292 293 portdata = usb_get_serial_port_data(port); 294 295 if (portdata->dtr_state) 296 val |= 0x01; 297 if (portdata->rts_state) 298 val |= 0x02; 299 300 /* If composite device then properly report interface */ 301 if (serial->num_ports == 1) { 302 interface = sierra_calc_interface(serial); 303 /* Control message is sent only to interfaces with 304 * interrupt_in endpoints 305 */ 306 if (port->interrupt_in_urb) { 307 /* send control message */ 308 return usb_control_msg(serial->dev, 309 usb_rcvctrlpipe(serial->dev, 0), 310 0x22, 0x21, val, interface, 311 NULL, 0, USB_CTRL_SET_TIMEOUT); 312 } 313 } 314 315 /* Otherwise the need to do non-composite mapping */ 316 else { 317 if (port->bulk_out_endpointAddress == 2) 318 interface = 0; 319 else if (port->bulk_out_endpointAddress == 4) 320 interface = 1; 321 else if (port->bulk_out_endpointAddress == 5) 322 interface = 2; 323 return usb_control_msg(serial->dev, 324 usb_rcvctrlpipe(serial->dev, 0), 325 0x22, 0x21, val, interface, 326 NULL, 0, USB_CTRL_SET_TIMEOUT); 327 } 328 return 0; 329 } 330 331 static void sierra_set_termios(struct tty_struct *tty, 332 struct usb_serial_port *port, struct ktermios *old_termios) 333 { 334 dev_dbg(&port->dev, "%s\n", __func__); 335 tty_termios_copy_hw(tty->termios, old_termios); 336 sierra_send_setup(port); 337 } 338 339 static int sierra_tiocmget(struct tty_struct *tty, struct file *file) 340 { 341 struct usb_serial_port *port = tty->driver_data; 342 unsigned int value; 343 struct sierra_port_private *portdata; 344 345 dev_dbg(&port->dev, "%s\n", __func__); 346 portdata = usb_get_serial_port_data(port); 347 348 value = ((portdata->rts_state) ? TIOCM_RTS : 0) | 349 ((portdata->dtr_state) ? TIOCM_DTR : 0) | 350 ((portdata->cts_state) ? TIOCM_CTS : 0) | 351 ((portdata->dsr_state) ? TIOCM_DSR : 0) | 352 ((portdata->dcd_state) ? TIOCM_CAR : 0) | 353 ((portdata->ri_state) ? TIOCM_RNG : 0); 354 355 return value; 356 } 357 358 static int sierra_tiocmset(struct tty_struct *tty, struct file *file, 359 unsigned int set, unsigned int clear) 360 { 361 struct usb_serial_port *port = tty->driver_data; 362 struct sierra_port_private *portdata; 363 364 portdata = usb_get_serial_port_data(port); 365 366 if (set & TIOCM_RTS) 367 portdata->rts_state = 1; 368 if (set & TIOCM_DTR) 369 portdata->dtr_state = 1; 370 371 if (clear & TIOCM_RTS) 372 portdata->rts_state = 0; 373 if (clear & TIOCM_DTR) 374 portdata->dtr_state = 0; 375 return sierra_send_setup(port); 376 } 377 378 static void sierra_release_urb(struct urb *urb) 379 { 380 struct usb_serial_port *port; 381 if (urb) { 382 port = urb->context; 383 dev_dbg(&port->dev, "%s: %p\n", __func__, urb); 384 kfree(urb->transfer_buffer); 385 usb_free_urb(urb); 386 } 387 } 388 389 static void sierra_outdat_callback(struct urb *urb) 390 { 391 struct usb_serial_port *port = urb->context; 392 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 393 int status = urb->status; 394 unsigned long flags; 395 396 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number); 397 398 /* free up the transfer buffer, as usb_free_urb() does not do this */ 399 kfree(urb->transfer_buffer); 400 401 if (status) 402 dev_dbg(&port->dev, "%s - nonzero write bulk status " 403 "received: %d\n", __func__, status); 404 405 spin_lock_irqsave(&portdata->lock, flags); 406 --portdata->outstanding_urbs; 407 spin_unlock_irqrestore(&portdata->lock, flags); 408 409 usb_serial_port_softint(port); 410 } 411 412 /* Write */ 413 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port, 414 const unsigned char *buf, int count) 415 { 416 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 417 struct usb_serial *serial = port->serial; 418 unsigned long flags; 419 unsigned char *buffer; 420 struct urb *urb; 421 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER); 422 int retval = 0; 423 424 /* verify that we actually have some data to write */ 425 if (count == 0) 426 return 0; 427 428 portdata = usb_get_serial_port_data(port); 429 430 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize); 431 432 spin_lock_irqsave(&portdata->lock, flags); 433 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__, 434 portdata->outstanding_urbs); 435 if (portdata->outstanding_urbs > N_OUT_URB) { 436 spin_unlock_irqrestore(&portdata->lock, flags); 437 dev_dbg(&port->dev, "%s - write limit hit\n", __func__); 438 return 0; 439 } 440 portdata->outstanding_urbs++; 441 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__, 442 portdata->outstanding_urbs); 443 spin_unlock_irqrestore(&portdata->lock, flags); 444 445 buffer = kmalloc(writesize, GFP_ATOMIC); 446 if (!buffer) { 447 dev_err(&port->dev, "out of memory\n"); 448 retval = -ENOMEM; 449 goto error_no_buffer; 450 } 451 452 urb = usb_alloc_urb(0, GFP_ATOMIC); 453 if (!urb) { 454 dev_err(&port->dev, "no more free urbs\n"); 455 retval = -ENOMEM; 456 goto error_no_urb; 457 } 458 459 memcpy(buffer, buf, writesize); 460 461 usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer); 462 463 usb_fill_bulk_urb(urb, serial->dev, 464 usb_sndbulkpipe(serial->dev, 465 port->bulk_out_endpointAddress), 466 buffer, writesize, sierra_outdat_callback, port); 467 468 /* Handle the need to send a zero length packet */ 469 urb->transfer_flags |= URB_ZERO_PACKET; 470 471 /* send it down the pipe */ 472 retval = usb_submit_urb(urb, GFP_ATOMIC); 473 if (retval) { 474 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " 475 "with status = %d\n", __func__, retval); 476 goto error; 477 } 478 479 /* we are done with this urb, so let the host driver 480 * really free it when it is finished with it */ 481 usb_free_urb(urb); 482 483 return writesize; 484 error: 485 usb_free_urb(urb); 486 error_no_urb: 487 kfree(buffer); 488 error_no_buffer: 489 spin_lock_irqsave(&portdata->lock, flags); 490 --portdata->outstanding_urbs; 491 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__, 492 portdata->outstanding_urbs); 493 spin_unlock_irqrestore(&portdata->lock, flags); 494 return retval; 495 } 496 497 static void sierra_indat_callback(struct urb *urb) 498 { 499 int err; 500 int endpoint; 501 struct usb_serial_port *port; 502 struct tty_struct *tty; 503 unsigned char *data = urb->transfer_buffer; 504 int status = urb->status; 505 506 endpoint = usb_pipeendpoint(urb->pipe); 507 port = urb->context; 508 509 dev_dbg(&port->dev, "%s: %p\n", __func__, urb); 510 511 if (status) { 512 dev_dbg(&port->dev, "%s: nonzero status: %d on" 513 " endpoint %02x\n", __func__, status, endpoint); 514 } else { 515 if (urb->actual_length) { 516 tty = tty_port_tty_get(&port->port); 517 518 tty_buffer_request_room(tty, urb->actual_length); 519 tty_insert_flip_string(tty, data, urb->actual_length); 520 tty_flip_buffer_push(tty); 521 522 tty_kref_put(tty); 523 usb_serial_debug_data(debug, &port->dev, __func__, 524 urb->actual_length, data); 525 } else { 526 dev_dbg(&port->dev, "%s: empty read urb" 527 " received\n", __func__); 528 } 529 } 530 531 /* Resubmit urb so we continue receiving */ 532 if (port->port.count && status != -ESHUTDOWN && status != -EPERM) { 533 err = usb_submit_urb(urb, GFP_ATOMIC); 534 if (err) 535 dev_err(&port->dev, "resubmit read urb failed." 536 "(%d)\n", err); 537 } 538 539 return; 540 } 541 542 static void sierra_instat_callback(struct urb *urb) 543 { 544 int err; 545 int status = urb->status; 546 struct usb_serial_port *port = urb->context; 547 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 548 struct usb_serial *serial = port->serial; 549 550 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__, 551 urb, port, portdata); 552 553 if (status == 0) { 554 struct usb_ctrlrequest *req_pkt = 555 (struct usb_ctrlrequest *)urb->transfer_buffer; 556 557 if (!req_pkt) { 558 dev_dbg(&port->dev, "%s: NULL req_pkt\n", 559 __func__); 560 return; 561 } 562 if ((req_pkt->bRequestType == 0xA1) && 563 (req_pkt->bRequest == 0x20)) { 564 int old_dcd_state; 565 unsigned char signals = *((unsigned char *) 566 urb->transfer_buffer + 567 sizeof(struct usb_ctrlrequest)); 568 struct tty_struct *tty; 569 570 dev_dbg(&port->dev, "%s: signal x%x\n", __func__, 571 signals); 572 573 old_dcd_state = portdata->dcd_state; 574 portdata->cts_state = 1; 575 portdata->dcd_state = ((signals & 0x01) ? 1 : 0); 576 portdata->dsr_state = ((signals & 0x02) ? 1 : 0); 577 portdata->ri_state = ((signals & 0x08) ? 1 : 0); 578 579 tty = tty_port_tty_get(&port->port); 580 if (tty && !C_CLOCAL(tty) && 581 old_dcd_state && !portdata->dcd_state) 582 tty_hangup(tty); 583 tty_kref_put(tty); 584 } else { 585 dev_dbg(&port->dev, "%s: type %x req %x\n", 586 __func__, req_pkt->bRequestType, 587 req_pkt->bRequest); 588 } 589 } else 590 dev_dbg(&port->dev, "%s: error %d\n", __func__, status); 591 592 /* Resubmit urb so we continue receiving IRQ data */ 593 if (port->port.count && status != -ESHUTDOWN && status != -ENOENT) { 594 urb->dev = serial->dev; 595 err = usb_submit_urb(urb, GFP_ATOMIC); 596 if (err) 597 dev_err(&port->dev, "%s: resubmit intr urb " 598 "failed. (%d)\n", __func__, err); 599 } 600 } 601 602 static int sierra_write_room(struct tty_struct *tty) 603 { 604 struct usb_serial_port *port = tty->driver_data; 605 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 606 unsigned long flags; 607 608 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number); 609 610 /* try to give a good number back based on if we have any free urbs at 611 * this point in time */ 612 spin_lock_irqsave(&portdata->lock, flags); 613 if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) { 614 spin_unlock_irqrestore(&portdata->lock, flags); 615 dev_dbg(&port->dev, "%s - write limit hit\n", __func__); 616 return 0; 617 } 618 spin_unlock_irqrestore(&portdata->lock, flags); 619 620 return 2048; 621 } 622 623 static void sierra_stop_rx_urbs(struct usb_serial_port *port) 624 { 625 int i; 626 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 627 628 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++) 629 usb_kill_urb(portdata->in_urbs[i]); 630 631 usb_kill_urb(port->interrupt_in_urb); 632 } 633 634 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags) 635 { 636 int ok_cnt; 637 int err = -EINVAL; 638 int i; 639 struct urb *urb; 640 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 641 642 ok_cnt = 0; 643 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++) { 644 urb = portdata->in_urbs[i]; 645 if (!urb) 646 continue; 647 err = usb_submit_urb(urb, mem_flags); 648 if (err) { 649 dev_err(&port->dev, "%s: submit urb failed: %d\n", 650 __func__, err); 651 } else { 652 ok_cnt++; 653 } 654 } 655 656 if (ok_cnt && port->interrupt_in_urb) { 657 err = usb_submit_urb(port->interrupt_in_urb, mem_flags); 658 if (err) { 659 dev_err(&port->dev, "%s: submit intr urb failed: %d\n", 660 __func__, err); 661 } 662 } 663 664 if (ok_cnt > 0) /* at least one rx urb submitted */ 665 return 0; 666 else 667 return err; 668 } 669 670 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint, 671 int dir, void *ctx, int len, 672 gfp_t mem_flags, 673 usb_complete_t callback) 674 { 675 struct urb *urb; 676 u8 *buf; 677 678 if (endpoint == -1) 679 return NULL; 680 681 urb = usb_alloc_urb(0, mem_flags); 682 if (urb == NULL) { 683 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n", 684 __func__, endpoint); 685 return NULL; 686 } 687 688 buf = kmalloc(len, mem_flags); 689 if (buf) { 690 /* Fill URB using supplied data */ 691 usb_fill_bulk_urb(urb, serial->dev, 692 usb_sndbulkpipe(serial->dev, endpoint) | dir, 693 buf, len, callback, ctx); 694 695 /* debug */ 696 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__, 697 dir == USB_DIR_IN ? 'i' : 'o', urb, buf); 698 } else { 699 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__, 700 dir == USB_DIR_IN ? 'i' : 'o', urb, buf); 701 702 sierra_release_urb(urb); 703 urb = NULL; 704 } 705 706 return urb; 707 } 708 709 static void sierra_close(struct usb_serial_port *port) 710 { 711 int i; 712 struct usb_serial *serial = port->serial; 713 struct sierra_port_private *portdata; 714 715 dev_dbg(&port->dev, "%s\n", __func__); 716 portdata = usb_get_serial_port_data(port); 717 718 portdata->rts_state = 0; 719 portdata->dtr_state = 0; 720 721 if (serial->dev) { 722 mutex_lock(&serial->disc_mutex); 723 if (!serial->disconnected) 724 sierra_send_setup(port); 725 mutex_unlock(&serial->disc_mutex); 726 727 /* Stop reading urbs */ 728 sierra_stop_rx_urbs(port); 729 /* .. and release them */ 730 for (i = 0; i < N_IN_URB; i++) { 731 sierra_release_urb(portdata->in_urbs[i]); 732 portdata->in_urbs[i] = NULL; 733 } 734 } 735 } 736 737 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port) 738 { 739 struct sierra_port_private *portdata; 740 struct usb_serial *serial = port->serial; 741 int i; 742 int err; 743 int endpoint; 744 struct urb *urb; 745 746 portdata = usb_get_serial_port_data(port); 747 748 dev_dbg(&port->dev, "%s\n", __func__); 749 750 /* Set some sane defaults */ 751 portdata->rts_state = 1; 752 portdata->dtr_state = 1; 753 754 755 endpoint = port->bulk_in_endpointAddress; 756 for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++) { 757 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port, 758 IN_BUFLEN, GFP_KERNEL, 759 sierra_indat_callback); 760 portdata->in_urbs[i] = urb; 761 } 762 /* clear halt condition */ 763 usb_clear_halt(serial->dev, 764 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN); 765 766 err = sierra_submit_rx_urbs(port, GFP_KERNEL); 767 if (err) { 768 /* get rid of everything as in close */ 769 sierra_close(port); 770 return err; 771 } 772 sierra_send_setup(port); 773 774 return 0; 775 } 776 777 778 static void sierra_dtr_rts(struct usb_serial_port *port, int on) 779 { 780 struct usb_serial *serial = port->serial; 781 struct sierra_port_private *portdata; 782 783 portdata = usb_get_serial_port_data(port); 784 portdata->rts_state = on; 785 portdata->dtr_state = on; 786 787 if (serial->dev) { 788 mutex_lock(&serial->disc_mutex); 789 if (!serial->disconnected) 790 sierra_send_setup(port); 791 mutex_unlock(&serial->disc_mutex); 792 } 793 } 794 795 static int sierra_startup(struct usb_serial *serial) 796 { 797 struct usb_serial_port *port; 798 struct sierra_port_private *portdata; 799 int i; 800 801 dev_dbg(&serial->dev->dev, "%s\n", __func__); 802 803 /* Set Device mode to D0 */ 804 sierra_set_power_state(serial->dev, 0x0000); 805 806 /* Check NMEA and set */ 807 if (nmea) 808 sierra_vsc_set_nmea(serial->dev, 1); 809 810 /* Now setup per port private data */ 811 for (i = 0; i < serial->num_ports; i++) { 812 port = serial->port[i]; 813 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL); 814 if (!portdata) { 815 dev_dbg(&port->dev, "%s: kmalloc for " 816 "sierra_port_private (%d) failed!.\n", 817 __func__, i); 818 return -ENOMEM; 819 } 820 spin_lock_init(&portdata->lock); 821 /* Set the port private data pointer */ 822 usb_set_serial_port_data(port, portdata); 823 } 824 825 return 0; 826 } 827 828 static void sierra_release(struct usb_serial *serial) 829 { 830 int i; 831 struct usb_serial_port *port; 832 struct sierra_port_private *portdata; 833 834 dev_dbg(&serial->dev->dev, "%s\n", __func__); 835 836 for (i = 0; i < serial->num_ports; ++i) { 837 port = serial->port[i]; 838 if (!port) 839 continue; 840 portdata = usb_get_serial_port_data(port); 841 if (!portdata) 842 continue; 843 kfree(portdata); 844 } 845 } 846 847 static struct usb_serial_driver sierra_device = { 848 .driver = { 849 .owner = THIS_MODULE, 850 .name = "sierra", 851 }, 852 .description = "Sierra USB modem", 853 .id_table = id_table, 854 .usb_driver = &sierra_driver, 855 .calc_num_ports = sierra_calc_num_ports, 856 .probe = sierra_probe, 857 .open = sierra_open, 858 .close = sierra_close, 859 .dtr_rts = sierra_dtr_rts, 860 .write = sierra_write, 861 .write_room = sierra_write_room, 862 .set_termios = sierra_set_termios, 863 .tiocmget = sierra_tiocmget, 864 .tiocmset = sierra_tiocmset, 865 .attach = sierra_startup, 866 .release = sierra_release, 867 .read_int_callback = sierra_instat_callback, 868 }; 869 870 /* Functions used by new usb-serial code. */ 871 static int __init sierra_init(void) 872 { 873 int retval; 874 retval = usb_serial_register(&sierra_device); 875 if (retval) 876 goto failed_device_register; 877 878 879 retval = usb_register(&sierra_driver); 880 if (retval) 881 goto failed_driver_register; 882 883 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 884 DRIVER_DESC "\n"); 885 886 return 0; 887 888 failed_driver_register: 889 usb_serial_deregister(&sierra_device); 890 failed_device_register: 891 return retval; 892 } 893 894 static void __exit sierra_exit(void) 895 { 896 usb_deregister(&sierra_driver); 897 usb_serial_deregister(&sierra_device); 898 } 899 900 module_init(sierra_init); 901 module_exit(sierra_exit); 902 903 MODULE_AUTHOR(DRIVER_AUTHOR); 904 MODULE_DESCRIPTION(DRIVER_DESC); 905 MODULE_VERSION(DRIVER_VERSION); 906 MODULE_LICENSE("GPL"); 907 908 module_param(nmea, bool, S_IRUGO | S_IWUSR); 909 MODULE_PARM_DESC(nmea, "NMEA streaming"); 910 911 module_param(debug, bool, S_IRUGO | S_IWUSR); 912 MODULE_PARM_DESC(debug, "Debug messages"); 913