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FreeBSD/Linux Kernel Cross Reference
sys/drivers/usb/serial/sierra.c
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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 /* Uncomment to log function calls */ 20 /* #define DEBUG */ 21 22 #define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer" 23 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems" 24 25 #include <linux/kernel.h> 26 #include <linux/jiffies.h> 27 #include <linux/errno.h> 28 #include <linux/tty.h> 29 #include <linux/slab.h> 30 #include <linux/tty_flip.h> 31 #include <linux/module.h> 32 #include <linux/usb.h> 33 #include <linux/usb/serial.h> 34 35 #define SWIMS_USB_REQUEST_SetPower 0x00 36 #define SWIMS_USB_REQUEST_SetNmea 0x07 37 38 #define N_IN_URB_HM 8 39 #define N_OUT_URB_HM 64 40 #define N_IN_URB 4 41 #define N_OUT_URB 4 42 #define IN_BUFLEN 4096 43 44 #define MAX_TRANSFER (PAGE_SIZE - 512) 45 /* MAX_TRANSFER is chosen so that the VM is not stressed by 46 allocations > PAGE_SIZE and the number of packets in a page 47 is an integer 512 is the largest possible packet on EHCI */ 48 49 static bool nmea; 50 51 /* Used in interface blacklisting */ 52 struct sierra_iface_info { 53 const u32 infolen; /* number of interface numbers on blacklist */ 54 const u8 *ifaceinfo; /* pointer to the array holding the numbers */ 55 }; 56 57 struct sierra_intf_private { 58 spinlock_t susp_lock; 59 unsigned int suspended:1; 60 int in_flight; 61 }; 62 63 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState) 64 { 65 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 66 SWIMS_USB_REQUEST_SetPower, /* __u8 request */ 67 USB_TYPE_VENDOR, /* __u8 request type */ 68 swiState, /* __u16 value */ 69 0, /* __u16 index */ 70 NULL, /* void *data */ 71 0, /* __u16 size */ 72 USB_CTRL_SET_TIMEOUT); /* int timeout */ 73 } 74 75 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable) 76 { 77 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 78 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */ 79 USB_TYPE_VENDOR, /* __u8 request type */ 80 enable, /* __u16 value */ 81 0x0000, /* __u16 index */ 82 NULL, /* void *data */ 83 0, /* __u16 size */ 84 USB_CTRL_SET_TIMEOUT); /* int timeout */ 85 } 86 87 static int sierra_calc_num_ports(struct usb_serial *serial) 88 { 89 int num_ports = 0; 90 u8 ifnum, numendpoints; 91 92 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber; 93 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints; 94 95 /* Dummy interface present on some SKUs should be ignored */ 96 if (ifnum == 0x99) 97 num_ports = 0; 98 else if (numendpoints <= 3) 99 num_ports = 1; 100 else 101 num_ports = (numendpoints-1)/2; 102 return num_ports; 103 } 104 105 static int is_blacklisted(const u8 ifnum, 106 const struct sierra_iface_info *blacklist) 107 { 108 const u8 *info; 109 int i; 110 111 if (blacklist) { 112 info = blacklist->ifaceinfo; 113 114 for (i = 0; i < blacklist->infolen; i++) { 115 if (info[i] == ifnum) 116 return 1; 117 } 118 } 119 return 0; 120 } 121 122 static int is_himemory(const u8 ifnum, 123 const struct sierra_iface_info *himemorylist) 124 { 125 const u8 *info; 126 int i; 127 128 if (himemorylist) { 129 info = himemorylist->ifaceinfo; 130 131 for (i=0; i < himemorylist->infolen; i++) { 132 if (info[i] == ifnum) 133 return 1; 134 } 135 } 136 return 0; 137 } 138 139 static int sierra_calc_interface(struct usb_serial *serial) 140 { 141 int interface; 142 struct usb_interface *p_interface; 143 struct usb_host_interface *p_host_interface; 144 145 /* Get the interface structure pointer from the serial struct */ 146 p_interface = serial->interface; 147 148 /* Get a pointer to the host interface structure */ 149 p_host_interface = p_interface->cur_altsetting; 150 151 /* read the interface descriptor for this active altsetting 152 * to find out the interface number we are on 153 */ 154 interface = p_host_interface->desc.bInterfaceNumber; 155 156 return interface; 157 } 158 159 static int sierra_probe(struct usb_serial *serial, 160 const struct usb_device_id *id) 161 { 162 int result = 0; 163 struct usb_device *udev; 164 u8 ifnum; 165 166 udev = serial->dev; 167 ifnum = sierra_calc_interface(serial); 168 169 /* 170 * If this interface supports more than 1 alternate 171 * select the 2nd one 172 */ 173 if (serial->interface->num_altsetting == 2) { 174 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n", 175 ifnum); 176 /* We know the alternate setting is 1 for the MC8785 */ 177 usb_set_interface(udev, ifnum, 1); 178 } 179 180 /* ifnum could have changed - by calling usb_set_interface */ 181 ifnum = sierra_calc_interface(serial); 182 183 if (is_blacklisted(ifnum, 184 (struct sierra_iface_info *)id->driver_info)) { 185 dev_dbg(&serial->dev->dev, 186 "Ignoring blacklisted interface #%d\n", ifnum); 187 return -ENODEV; 188 } 189 190 return result; 191 } 192 193 /* interfaces with higher memory requirements */ 194 static const u8 hi_memory_typeA_ifaces[] = { 0, 2 }; 195 static const struct sierra_iface_info typeA_interface_list = { 196 .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces), 197 .ifaceinfo = hi_memory_typeA_ifaces, 198 }; 199 200 static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 }; 201 static const struct sierra_iface_info typeB_interface_list = { 202 .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces), 203 .ifaceinfo = hi_memory_typeB_ifaces, 204 }; 205 206 /* 'blacklist' of interfaces not served by this driver */ 207 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11, 19, 20 }; 208 static const struct sierra_iface_info direct_ip_interface_blacklist = { 209 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces), 210 .ifaceinfo = direct_ip_non_serial_ifaces, 211 }; 212 213 static const struct usb_device_id id_table[] = { 214 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */ 215 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */ 216 { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */ 217 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */ 218 219 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */ 220 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */ 221 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */ 222 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */ 223 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */ 224 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */ 225 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */ 226 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */ 227 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */ 228 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */ 229 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */ 230 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */ 231 { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */ 232 /* Sierra Wireless C597 */ 233 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) }, 234 /* Sierra Wireless T598 */ 235 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) }, 236 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */ 237 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */ 238 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */ 239 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */ 240 241 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */ 242 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */ 243 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */ 244 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */ 245 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */ 246 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */ 247 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */ 248 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */ 249 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */ 250 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */ 251 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */ 252 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */ 253 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */ 254 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */ 255 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */ 256 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */ 257 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */ 258 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */ 259 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */ 260 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */ 261 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */ 262 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */ 263 { USB_DEVICE(0x1199, 0x683C) }, 264 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */ 265 /* Sierra Wireless MC8790, MC8791, MC8792 */ 266 { USB_DEVICE(0x1199, 0x683E) }, 267 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */ 268 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */ 269 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */ 270 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */ 271 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */ 272 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */ 273 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */ 274 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */ 275 /* Sierra Wireless C885 */ 276 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)}, 277 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */ 278 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)}, 279 /* Sierra Wireless C22/C33 */ 280 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)}, 281 /* Sierra Wireless HSPA Non-Composite Device */ 282 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)}, 283 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */ 284 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */ 285 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist 286 }, 287 /* AT&T Direct IP LTE modems */ 288 { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF), 289 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist 290 }, 291 { USB_DEVICE(0x0f3d, 0x68A3), /* Airprime/Sierra Wireless Direct IP modems */ 292 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist 293 }, 294 { USB_DEVICE(0x413C, 0x08133) }, /* Dell Computer Corp. Wireless 5720 VZW Mobile Broadband (EVDO Rev-A) Minicard GPS Port */ 295 296 { } 297 }; 298 MODULE_DEVICE_TABLE(usb, id_table); 299 300 301 struct sierra_port_private { 302 spinlock_t lock; /* lock the structure */ 303 int outstanding_urbs; /* number of out urbs in flight */ 304 struct usb_anchor active; 305 struct usb_anchor delayed; 306 307 int num_out_urbs; 308 int num_in_urbs; 309 /* Input endpoints and buffers for this port */ 310 struct urb *in_urbs[N_IN_URB_HM]; 311 312 /* Settings for the port */ 313 int rts_state; /* Handshaking pins (outputs) */ 314 int dtr_state; 315 int cts_state; /* Handshaking pins (inputs) */ 316 int dsr_state; 317 int dcd_state; 318 int ri_state; 319 unsigned int opened:1; 320 }; 321 322 static int sierra_send_setup(struct usb_serial_port *port) 323 { 324 struct usb_serial *serial = port->serial; 325 struct sierra_port_private *portdata; 326 __u16 interface = 0; 327 int val = 0; 328 int do_send = 0; 329 int retval; 330 331 portdata = usb_get_serial_port_data(port); 332 333 if (portdata->dtr_state) 334 val |= 0x01; 335 if (portdata->rts_state) 336 val |= 0x02; 337 338 /* If composite device then properly report interface */ 339 if (serial->num_ports == 1) { 340 interface = sierra_calc_interface(serial); 341 /* Control message is sent only to interfaces with 342 * interrupt_in endpoints 343 */ 344 if (port->interrupt_in_urb) { 345 /* send control message */ 346 do_send = 1; 347 } 348 } 349 350 /* Otherwise the need to do non-composite mapping */ 351 else { 352 if (port->bulk_out_endpointAddress == 2) 353 interface = 0; 354 else if (port->bulk_out_endpointAddress == 4) 355 interface = 1; 356 else if (port->bulk_out_endpointAddress == 5) 357 interface = 2; 358 359 do_send = 1; 360 } 361 if (!do_send) 362 return 0; 363 364 retval = usb_autopm_get_interface(serial->interface); 365 if (retval < 0) 366 return retval; 367 368 retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 369 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT); 370 usb_autopm_put_interface(serial->interface); 371 372 return retval; 373 } 374 375 static void sierra_set_termios(struct tty_struct *tty, 376 struct usb_serial_port *port, struct ktermios *old_termios) 377 { 378 tty_termios_copy_hw(&tty->termios, old_termios); 379 sierra_send_setup(port); 380 } 381 382 static int sierra_tiocmget(struct tty_struct *tty) 383 { 384 struct usb_serial_port *port = tty->driver_data; 385 unsigned int value; 386 struct sierra_port_private *portdata; 387 388 portdata = usb_get_serial_port_data(port); 389 390 value = ((portdata->rts_state) ? TIOCM_RTS : 0) | 391 ((portdata->dtr_state) ? TIOCM_DTR : 0) | 392 ((portdata->cts_state) ? TIOCM_CTS : 0) | 393 ((portdata->dsr_state) ? TIOCM_DSR : 0) | 394 ((portdata->dcd_state) ? TIOCM_CAR : 0) | 395 ((portdata->ri_state) ? TIOCM_RNG : 0); 396 397 return value; 398 } 399 400 static int sierra_tiocmset(struct tty_struct *tty, 401 unsigned int set, unsigned int clear) 402 { 403 struct usb_serial_port *port = tty->driver_data; 404 struct sierra_port_private *portdata; 405 406 portdata = usb_get_serial_port_data(port); 407 408 if (set & TIOCM_RTS) 409 portdata->rts_state = 1; 410 if (set & TIOCM_DTR) 411 portdata->dtr_state = 1; 412 413 if (clear & TIOCM_RTS) 414 portdata->rts_state = 0; 415 if (clear & TIOCM_DTR) 416 portdata->dtr_state = 0; 417 return sierra_send_setup(port); 418 } 419 420 static void sierra_release_urb(struct urb *urb) 421 { 422 struct usb_serial_port *port; 423 if (urb) { 424 port = urb->context; 425 kfree(urb->transfer_buffer); 426 usb_free_urb(urb); 427 } 428 } 429 430 static void sierra_outdat_callback(struct urb *urb) 431 { 432 struct usb_serial_port *port = urb->context; 433 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 434 struct sierra_intf_private *intfdata; 435 int status = urb->status; 436 437 intfdata = port->serial->private; 438 439 /* free up the transfer buffer, as usb_free_urb() does not do this */ 440 kfree(urb->transfer_buffer); 441 usb_autopm_put_interface_async(port->serial->interface); 442 if (status) 443 dev_dbg(&port->dev, "%s - nonzero write bulk status " 444 "received: %d\n", __func__, status); 445 446 spin_lock(&portdata->lock); 447 --portdata->outstanding_urbs; 448 spin_unlock(&portdata->lock); 449 spin_lock(&intfdata->susp_lock); 450 --intfdata->in_flight; 451 spin_unlock(&intfdata->susp_lock); 452 453 usb_serial_port_softint(port); 454 } 455 456 /* Write */ 457 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port, 458 const unsigned char *buf, int count) 459 { 460 struct sierra_port_private *portdata; 461 struct sierra_intf_private *intfdata; 462 struct usb_serial *serial = port->serial; 463 unsigned long flags; 464 unsigned char *buffer; 465 struct urb *urb; 466 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER); 467 int retval = 0; 468 469 /* verify that we actually have some data to write */ 470 if (count == 0) 471 return 0; 472 473 portdata = usb_get_serial_port_data(port); 474 intfdata = serial->private; 475 476 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize); 477 spin_lock_irqsave(&portdata->lock, flags); 478 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__, 479 portdata->outstanding_urbs); 480 if (portdata->outstanding_urbs > portdata->num_out_urbs) { 481 spin_unlock_irqrestore(&portdata->lock, flags); 482 dev_dbg(&port->dev, "%s - write limit hit\n", __func__); 483 return 0; 484 } 485 portdata->outstanding_urbs++; 486 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__, 487 portdata->outstanding_urbs); 488 spin_unlock_irqrestore(&portdata->lock, flags); 489 490 retval = usb_autopm_get_interface_async(serial->interface); 491 if (retval < 0) { 492 spin_lock_irqsave(&portdata->lock, flags); 493 portdata->outstanding_urbs--; 494 spin_unlock_irqrestore(&portdata->lock, flags); 495 goto error_simple; 496 } 497 498 buffer = kmalloc(writesize, GFP_ATOMIC); 499 if (!buffer) { 500 dev_err(&port->dev, "out of memory\n"); 501 retval = -ENOMEM; 502 goto error_no_buffer; 503 } 504 505 urb = usb_alloc_urb(0, GFP_ATOMIC); 506 if (!urb) { 507 dev_err(&port->dev, "no more free urbs\n"); 508 retval = -ENOMEM; 509 goto error_no_urb; 510 } 511 512 memcpy(buffer, buf, writesize); 513 514 usb_serial_debug_data(&port->dev, __func__, writesize, buffer); 515 516 usb_fill_bulk_urb(urb, serial->dev, 517 usb_sndbulkpipe(serial->dev, 518 port->bulk_out_endpointAddress), 519 buffer, writesize, sierra_outdat_callback, port); 520 521 /* Handle the need to send a zero length packet */ 522 urb->transfer_flags |= URB_ZERO_PACKET; 523 524 spin_lock_irqsave(&intfdata->susp_lock, flags); 525 526 if (intfdata->suspended) { 527 usb_anchor_urb(urb, &portdata->delayed); 528 spin_unlock_irqrestore(&intfdata->susp_lock, flags); 529 goto skip_power; 530 } else { 531 usb_anchor_urb(urb, &portdata->active); 532 } 533 /* send it down the pipe */ 534 retval = usb_submit_urb(urb, GFP_ATOMIC); 535 if (retval) { 536 usb_unanchor_urb(urb); 537 spin_unlock_irqrestore(&intfdata->susp_lock, flags); 538 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " 539 "with status = %d\n", __func__, retval); 540 goto error; 541 } else { 542 intfdata->in_flight++; 543 spin_unlock_irqrestore(&intfdata->susp_lock, flags); 544 } 545 546 skip_power: 547 /* we are done with this urb, so let the host driver 548 * really free it when it is finished with it */ 549 usb_free_urb(urb); 550 551 return writesize; 552 error: 553 usb_free_urb(urb); 554 error_no_urb: 555 kfree(buffer); 556 error_no_buffer: 557 spin_lock_irqsave(&portdata->lock, flags); 558 --portdata->outstanding_urbs; 559 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__, 560 portdata->outstanding_urbs); 561 spin_unlock_irqrestore(&portdata->lock, flags); 562 usb_autopm_put_interface_async(serial->interface); 563 error_simple: 564 return retval; 565 } 566 567 static void sierra_indat_callback(struct urb *urb) 568 { 569 int err; 570 int endpoint; 571 struct usb_serial_port *port; 572 struct tty_struct *tty; 573 unsigned char *data = urb->transfer_buffer; 574 int status = urb->status; 575 576 endpoint = usb_pipeendpoint(urb->pipe); 577 port = urb->context; 578 579 if (status) { 580 dev_dbg(&port->dev, "%s: nonzero status: %d on" 581 " endpoint %02x\n", __func__, status, endpoint); 582 } else { 583 if (urb->actual_length) { 584 tty = tty_port_tty_get(&port->port); 585 if (tty) { 586 tty_insert_flip_string(tty, data, 587 urb->actual_length); 588 tty_flip_buffer_push(tty); 589 590 tty_kref_put(tty); 591 usb_serial_debug_data(&port->dev, __func__, 592 urb->actual_length, data); 593 } 594 } else { 595 dev_dbg(&port->dev, "%s: empty read urb" 596 " received\n", __func__); 597 } 598 } 599 600 /* Resubmit urb so we continue receiving */ 601 if (status != -ESHUTDOWN && status != -EPERM) { 602 usb_mark_last_busy(port->serial->dev); 603 err = usb_submit_urb(urb, GFP_ATOMIC); 604 if (err && err != -EPERM) 605 dev_err(&port->dev, "resubmit read urb failed." 606 "(%d)\n", err); 607 } 608 } 609 610 static void sierra_instat_callback(struct urb *urb) 611 { 612 int err; 613 int status = urb->status; 614 struct usb_serial_port *port = urb->context; 615 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 616 struct usb_serial *serial = port->serial; 617 618 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__, 619 urb, port, portdata); 620 621 if (status == 0) { 622 struct usb_ctrlrequest *req_pkt = 623 (struct usb_ctrlrequest *)urb->transfer_buffer; 624 625 if (!req_pkt) { 626 dev_dbg(&port->dev, "%s: NULL req_pkt\n", 627 __func__); 628 return; 629 } 630 if ((req_pkt->bRequestType == 0xA1) && 631 (req_pkt->bRequest == 0x20)) { 632 int old_dcd_state; 633 unsigned char signals = *((unsigned char *) 634 urb->transfer_buffer + 635 sizeof(struct usb_ctrlrequest)); 636 struct tty_struct *tty; 637 638 dev_dbg(&port->dev, "%s: signal x%x\n", __func__, 639 signals); 640 641 old_dcd_state = portdata->dcd_state; 642 portdata->cts_state = 1; 643 portdata->dcd_state = ((signals & 0x01) ? 1 : 0); 644 portdata->dsr_state = ((signals & 0x02) ? 1 : 0); 645 portdata->ri_state = ((signals & 0x08) ? 1 : 0); 646 647 tty = tty_port_tty_get(&port->port); 648 if (tty && !C_CLOCAL(tty) && 649 old_dcd_state && !portdata->dcd_state) 650 tty_hangup(tty); 651 tty_kref_put(tty); 652 } else { 653 dev_dbg(&port->dev, "%s: type %x req %x\n", 654 __func__, req_pkt->bRequestType, 655 req_pkt->bRequest); 656 } 657 } else 658 dev_dbg(&port->dev, "%s: error %d\n", __func__, status); 659 660 /* Resubmit urb so we continue receiving IRQ data */ 661 if (status != -ESHUTDOWN && status != -ENOENT) { 662 usb_mark_last_busy(serial->dev); 663 err = usb_submit_urb(urb, GFP_ATOMIC); 664 if (err && err != -EPERM) 665 dev_err(&port->dev, "%s: resubmit intr urb " 666 "failed. (%d)\n", __func__, err); 667 } 668 } 669 670 static int sierra_write_room(struct tty_struct *tty) 671 { 672 struct usb_serial_port *port = tty->driver_data; 673 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 674 unsigned long flags; 675 676 /* try to give a good number back based on if we have any free urbs at 677 * this point in time */ 678 spin_lock_irqsave(&portdata->lock, flags); 679 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) { 680 spin_unlock_irqrestore(&portdata->lock, flags); 681 dev_dbg(&port->dev, "%s - write limit hit\n", __func__); 682 return 0; 683 } 684 spin_unlock_irqrestore(&portdata->lock, flags); 685 686 return 2048; 687 } 688 689 static void sierra_stop_rx_urbs(struct usb_serial_port *port) 690 { 691 int i; 692 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 693 694 for (i = 0; i < portdata->num_in_urbs; i++) 695 usb_kill_urb(portdata->in_urbs[i]); 696 697 usb_kill_urb(port->interrupt_in_urb); 698 } 699 700 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags) 701 { 702 int ok_cnt; 703 int err = -EINVAL; 704 int i; 705 struct urb *urb; 706 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 707 708 ok_cnt = 0; 709 for (i = 0; i < portdata->num_in_urbs; i++) { 710 urb = portdata->in_urbs[i]; 711 if (!urb) 712 continue; 713 err = usb_submit_urb(urb, mem_flags); 714 if (err) { 715 dev_err(&port->dev, "%s: submit urb failed: %d\n", 716 __func__, err); 717 } else { 718 ok_cnt++; 719 } 720 } 721 722 if (ok_cnt && port->interrupt_in_urb) { 723 err = usb_submit_urb(port->interrupt_in_urb, mem_flags); 724 if (err) { 725 dev_err(&port->dev, "%s: submit intr urb failed: %d\n", 726 __func__, err); 727 } 728 } 729 730 if (ok_cnt > 0) /* at least one rx urb submitted */ 731 return 0; 732 else 733 return err; 734 } 735 736 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint, 737 int dir, void *ctx, int len, 738 gfp_t mem_flags, 739 usb_complete_t callback) 740 { 741 struct urb *urb; 742 u8 *buf; 743 744 if (endpoint == -1) 745 return NULL; 746 747 urb = usb_alloc_urb(0, mem_flags); 748 if (urb == NULL) { 749 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n", 750 __func__, endpoint); 751 return NULL; 752 } 753 754 buf = kmalloc(len, mem_flags); 755 if (buf) { 756 /* Fill URB using supplied data */ 757 usb_fill_bulk_urb(urb, serial->dev, 758 usb_sndbulkpipe(serial->dev, endpoint) | dir, 759 buf, len, callback, ctx); 760 761 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__, 762 dir == USB_DIR_IN ? 'i' : 'o', urb, buf); 763 } else { 764 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__, 765 dir == USB_DIR_IN ? 'i' : 'o', urb, buf); 766 767 sierra_release_urb(urb); 768 urb = NULL; 769 } 770 771 return urb; 772 } 773 774 static void sierra_close(struct usb_serial_port *port) 775 { 776 int i; 777 struct usb_serial *serial = port->serial; 778 struct sierra_port_private *portdata; 779 struct sierra_intf_private *intfdata = port->serial->private; 780 781 portdata = usb_get_serial_port_data(port); 782 783 portdata->rts_state = 0; 784 portdata->dtr_state = 0; 785 786 if (serial->dev) { 787 mutex_lock(&serial->disc_mutex); 788 if (!serial->disconnected) { 789 serial->interface->needs_remote_wakeup = 0; 790 /* odd error handling due to pm counters */ 791 if (!usb_autopm_get_interface(serial->interface)) 792 sierra_send_setup(port); 793 else 794 usb_autopm_get_interface_no_resume(serial->interface); 795 796 } 797 mutex_unlock(&serial->disc_mutex); 798 spin_lock_irq(&intfdata->susp_lock); 799 portdata->opened = 0; 800 spin_unlock_irq(&intfdata->susp_lock); 801 802 803 /* Stop reading urbs */ 804 sierra_stop_rx_urbs(port); 805 /* .. and release them */ 806 for (i = 0; i < portdata->num_in_urbs; i++) { 807 sierra_release_urb(portdata->in_urbs[i]); 808 portdata->in_urbs[i] = NULL; 809 } 810 } 811 } 812 813 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port) 814 { 815 struct sierra_port_private *portdata; 816 struct usb_serial *serial = port->serial; 817 struct sierra_intf_private *intfdata = serial->private; 818 int i; 819 int err; 820 int endpoint; 821 struct urb *urb; 822 823 portdata = usb_get_serial_port_data(port); 824 825 /* Set some sane defaults */ 826 portdata->rts_state = 1; 827 portdata->dtr_state = 1; 828 829 830 endpoint = port->bulk_in_endpointAddress; 831 for (i = 0; i < portdata->num_in_urbs; i++) { 832 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port, 833 IN_BUFLEN, GFP_KERNEL, 834 sierra_indat_callback); 835 portdata->in_urbs[i] = urb; 836 } 837 /* clear halt condition */ 838 usb_clear_halt(serial->dev, 839 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN); 840 841 err = sierra_submit_rx_urbs(port, GFP_KERNEL); 842 if (err) { 843 /* get rid of everything as in close */ 844 sierra_close(port); 845 /* restore balance for autopm */ 846 if (!serial->disconnected) 847 usb_autopm_put_interface(serial->interface); 848 return err; 849 } 850 sierra_send_setup(port); 851 852 serial->interface->needs_remote_wakeup = 1; 853 spin_lock_irq(&intfdata->susp_lock); 854 portdata->opened = 1; 855 spin_unlock_irq(&intfdata->susp_lock); 856 usb_autopm_put_interface(serial->interface); 857 858 return 0; 859 } 860 861 862 static void sierra_dtr_rts(struct usb_serial_port *port, int on) 863 { 864 struct usb_serial *serial = port->serial; 865 struct sierra_port_private *portdata; 866 867 portdata = usb_get_serial_port_data(port); 868 portdata->rts_state = on; 869 portdata->dtr_state = on; 870 871 if (serial->dev) { 872 mutex_lock(&serial->disc_mutex); 873 if (!serial->disconnected) 874 sierra_send_setup(port); 875 mutex_unlock(&serial->disc_mutex); 876 } 877 } 878 879 static int sierra_startup(struct usb_serial *serial) 880 { 881 struct sierra_intf_private *intfdata; 882 883 intfdata = kzalloc(sizeof(*intfdata), GFP_KERNEL); 884 if (!intfdata) 885 return -ENOMEM; 886 887 spin_lock_init(&intfdata->susp_lock); 888 889 usb_set_serial_data(serial, intfdata); 890 891 /* Set Device mode to D0 */ 892 sierra_set_power_state(serial->dev, 0x0000); 893 894 /* Check NMEA and set */ 895 if (nmea) 896 sierra_vsc_set_nmea(serial->dev, 1); 897 898 return 0; 899 } 900 901 static void sierra_release(struct usb_serial *serial) 902 { 903 struct sierra_intf_private *intfdata; 904 905 intfdata = usb_get_serial_data(serial); 906 kfree(intfdata); 907 } 908 909 static int sierra_port_probe(struct usb_serial_port *port) 910 { 911 struct usb_serial *serial = port->serial; 912 struct sierra_port_private *portdata; 913 const struct sierra_iface_info *himemoryp; 914 u8 ifnum; 915 916 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL); 917 if (!portdata) 918 return -ENOMEM; 919 920 spin_lock_init(&portdata->lock); 921 init_usb_anchor(&portdata->active); 922 init_usb_anchor(&portdata->delayed); 923 924 /* Assume low memory requirements */ 925 portdata->num_out_urbs = N_OUT_URB; 926 portdata->num_in_urbs = N_IN_URB; 927 928 /* Determine actual memory requirements */ 929 if (serial->num_ports == 1) { 930 /* Get interface number for composite device */ 931 ifnum = sierra_calc_interface(serial); 932 himemoryp = &typeB_interface_list; 933 } else { 934 /* This is really the usb-serial port number of the interface 935 * rather than the interface number. 936 */ 937 ifnum = port->number - serial->minor; 938 himemoryp = &typeA_interface_list; 939 } 940 941 if (is_himemory(ifnum, himemoryp)) { 942 portdata->num_out_urbs = N_OUT_URB_HM; 943 portdata->num_in_urbs = N_IN_URB_HM; 944 } 945 946 dev_dbg(&port->dev, 947 "Memory usage (urbs) interface #%d, in=%d, out=%d\n", 948 ifnum, portdata->num_in_urbs, portdata->num_out_urbs); 949 950 usb_set_serial_port_data(port, portdata); 951 952 return 0; 953 } 954 955 static int sierra_port_remove(struct usb_serial_port *port) 956 { 957 struct sierra_port_private *portdata; 958 959 portdata = usb_get_serial_port_data(port); 960 kfree(portdata); 961 962 return 0; 963 } 964 965 #ifdef CONFIG_PM 966 static void stop_read_write_urbs(struct usb_serial *serial) 967 { 968 int i; 969 struct usb_serial_port *port; 970 struct sierra_port_private *portdata; 971 972 /* Stop reading/writing urbs */ 973 for (i = 0; i < serial->num_ports; ++i) { 974 port = serial->port[i]; 975 portdata = usb_get_serial_port_data(port); 976 sierra_stop_rx_urbs(port); 977 usb_kill_anchored_urbs(&portdata->active); 978 } 979 } 980 981 static int sierra_suspend(struct usb_serial *serial, pm_message_t message) 982 { 983 struct sierra_intf_private *intfdata; 984 int b; 985 986 if (PMSG_IS_AUTO(message)) { 987 intfdata = serial->private; 988 spin_lock_irq(&intfdata->susp_lock); 989 b = intfdata->in_flight; 990 991 if (b) { 992 spin_unlock_irq(&intfdata->susp_lock); 993 return -EBUSY; 994 } else { 995 intfdata->suspended = 1; 996 spin_unlock_irq(&intfdata->susp_lock); 997 } 998 } 999 stop_read_write_urbs(serial); 1000 1001 return 0; 1002 } 1003 1004 static int sierra_resume(struct usb_serial *serial) 1005 { 1006 struct usb_serial_port *port; 1007 struct sierra_intf_private *intfdata = serial->private; 1008 struct sierra_port_private *portdata; 1009 struct urb *urb; 1010 int ec = 0; 1011 int i, err; 1012 1013 spin_lock_irq(&intfdata->susp_lock); 1014 for (i = 0; i < serial->num_ports; i++) { 1015 port = serial->port[i]; 1016 portdata = usb_get_serial_port_data(port); 1017 1018 while ((urb = usb_get_from_anchor(&portdata->delayed))) { 1019 usb_anchor_urb(urb, &portdata->active); 1020 intfdata->in_flight++; 1021 err = usb_submit_urb(urb, GFP_ATOMIC); 1022 if (err < 0) { 1023 intfdata->in_flight--; 1024 usb_unanchor_urb(urb); 1025 usb_scuttle_anchored_urbs(&portdata->delayed); 1026 break; 1027 } 1028 } 1029 1030 if (portdata->opened) { 1031 err = sierra_submit_rx_urbs(port, GFP_ATOMIC); 1032 if (err) 1033 ec++; 1034 } 1035 } 1036 intfdata->suspended = 0; 1037 spin_unlock_irq(&intfdata->susp_lock); 1038 1039 return ec ? -EIO : 0; 1040 } 1041 1042 #else 1043 #define sierra_suspend NULL 1044 #define sierra_resume NULL 1045 #endif 1046 1047 static struct usb_serial_driver sierra_device = { 1048 .driver = { 1049 .owner = THIS_MODULE, 1050 .name = "sierra", 1051 }, 1052 .description = "Sierra USB modem", 1053 .id_table = id_table, 1054 .calc_num_ports = sierra_calc_num_ports, 1055 .probe = sierra_probe, 1056 .open = sierra_open, 1057 .close = sierra_close, 1058 .dtr_rts = sierra_dtr_rts, 1059 .write = sierra_write, 1060 .write_room = sierra_write_room, 1061 .set_termios = sierra_set_termios, 1062 .tiocmget = sierra_tiocmget, 1063 .tiocmset = sierra_tiocmset, 1064 .attach = sierra_startup, 1065 .release = sierra_release, 1066 .port_probe = sierra_port_probe, 1067 .port_remove = sierra_port_remove, 1068 .suspend = sierra_suspend, 1069 .resume = sierra_resume, 1070 .read_int_callback = sierra_instat_callback, 1071 }; 1072 1073 static struct usb_serial_driver * const serial_drivers[] = { 1074 &sierra_device, NULL 1075 }; 1076 1077 module_usb_serial_driver(serial_drivers, id_table); 1078 1079 MODULE_AUTHOR(DRIVER_AUTHOR); 1080 MODULE_DESCRIPTION(DRIVER_DESC); 1081 MODULE_LICENSE("GPL"); 1082 1083 module_param(nmea, bool, S_IRUGO | S_IWUSR); 1084 MODULE_PARM_DESC(nmea, "NMEA streaming");
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