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 #define DRIVER_VERSION "v.1.7.16" 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 int debug; 50 static int nmea; 51 52 /* Used in interface blacklisting */ 53 struct sierra_iface_info { 54 const u32 infolen; /* number of interface numbers on blacklist */ 55 const u8 *ifaceinfo; /* pointer to the array holding the numbers */ 56 }; 57 58 struct sierra_intf_private { 59 spinlock_t susp_lock; 60 unsigned int suspended:1; 61 int in_flight; 62 }; 63 64 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState) 65 { 66 int result; 67 dev_dbg(&udev->dev, "%s\n", __func__); 68 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 69 SWIMS_USB_REQUEST_SetPower, /* __u8 request */ 70 USB_TYPE_VENDOR, /* __u8 request type */ 71 swiState, /* __u16 value */ 72 0, /* __u16 index */ 73 NULL, /* void *data */ 74 0, /* __u16 size */ 75 USB_CTRL_SET_TIMEOUT); /* int timeout */ 76 return result; 77 } 78 79 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable) 80 { 81 int result; 82 dev_dbg(&udev->dev, "%s\n", __func__); 83 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 84 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */ 85 USB_TYPE_VENDOR, /* __u8 request type */ 86 enable, /* __u16 value */ 87 0x0000, /* __u16 index */ 88 NULL, /* void *data */ 89 0, /* __u16 size */ 90 USB_CTRL_SET_TIMEOUT); /* int timeout */ 91 return result; 92 } 93 94 static int sierra_calc_num_ports(struct usb_serial *serial) 95 { 96 int num_ports = 0; 97 u8 ifnum, numendpoints; 98 99 dev_dbg(&serial->dev->dev, "%s\n", __func__); 100 101 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber; 102 numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints; 103 104 /* Dummy interface present on some SKUs should be ignored */ 105 if (ifnum == 0x99) 106 num_ports = 0; 107 else if (numendpoints <= 3) 108 num_ports = 1; 109 else 110 num_ports = (numendpoints-1)/2; 111 return num_ports; 112 } 113 114 static int is_blacklisted(const u8 ifnum, 115 const struct sierra_iface_info *blacklist) 116 { 117 const u8 *info; 118 int i; 119 120 if (blacklist) { 121 info = blacklist->ifaceinfo; 122 123 for (i = 0; i < blacklist->infolen; i++) { 124 if (info[i] == ifnum) 125 return 1; 126 } 127 } 128 return 0; 129 } 130 131 static int is_himemory(const u8 ifnum, 132 const struct sierra_iface_info *himemorylist) 133 { 134 const u8 *info; 135 int i; 136 137 if (himemorylist) { 138 info = himemorylist->ifaceinfo; 139 140 for (i=0; i < himemorylist->infolen; i++) { 141 if (info[i] == ifnum) 142 return 1; 143 } 144 } 145 return 0; 146 } 147 148 static int sierra_calc_interface(struct usb_serial *serial) 149 { 150 int interface; 151 struct usb_interface *p_interface; 152 struct usb_host_interface *p_host_interface; 153 dev_dbg(&serial->dev->dev, "%s\n", __func__); 154 155 /* Get the interface structure pointer from the serial struct */ 156 p_interface = serial->interface; 157 158 /* Get a pointer to the host interface structure */ 159 p_host_interface = p_interface->cur_altsetting; 160 161 /* read the interface descriptor for this active altsetting 162 * to find out the interface number we are on 163 */ 164 interface = p_host_interface->desc.bInterfaceNumber; 165 166 return interface; 167 } 168 169 static int sierra_probe(struct usb_serial *serial, 170 const struct usb_device_id *id) 171 { 172 int result = 0; 173 struct usb_device *udev; 174 struct sierra_intf_private *data; 175 u8 ifnum; 176 177 udev = serial->dev; 178 dev_dbg(&udev->dev, "%s\n", __func__); 179 180 ifnum = sierra_calc_interface(serial); 181 /* 182 * If this interface supports more than 1 alternate 183 * select the 2nd one 184 */ 185 if (serial->interface->num_altsetting == 2) { 186 dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n", 187 ifnum); 188 /* We know the alternate setting is 1 for the MC8785 */ 189 usb_set_interface(udev, ifnum, 1); 190 } 191 192 /* ifnum could have changed - by calling usb_set_interface */ 193 ifnum = sierra_calc_interface(serial); 194 195 if (is_blacklisted(ifnum, 196 (struct sierra_iface_info *)id->driver_info)) { 197 dev_dbg(&serial->dev->dev, 198 "Ignoring blacklisted interface #%d\n", ifnum); 199 return -ENODEV; 200 } 201 202 data = serial->private = kzalloc(sizeof(struct sierra_intf_private), GFP_KERNEL); 203 if (!data) 204 return -ENOMEM; 205 spin_lock_init(&data->susp_lock); 206 207 return result; 208 } 209 210 /* interfaces with higher memory requirements */ 211 static const u8 hi_memory_typeA_ifaces[] = { 0, 2 }; 212 static const struct sierra_iface_info typeA_interface_list = { 213 .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces), 214 .ifaceinfo = hi_memory_typeA_ifaces, 215 }; 216 217 static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 }; 218 static const struct sierra_iface_info typeB_interface_list = { 219 .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces), 220 .ifaceinfo = hi_memory_typeB_ifaces, 221 }; 222 223 /* 'blacklist' of interfaces not served by this driver */ 224 static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11 }; 225 static const struct sierra_iface_info direct_ip_interface_blacklist = { 226 .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces), 227 .ifaceinfo = direct_ip_non_serial_ifaces, 228 }; 229 230 static const struct usb_device_id id_table[] = { 231 { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */ 232 { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */ 233 { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */ 234 { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */ 235 236 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */ 237 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */ 238 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */ 239 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */ 240 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */ 241 { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */ 242 { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */ 243 { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */ 244 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */ 245 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */ 246 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */ 247 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */ 248 { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U */ 249 /* Sierra Wireless C597 */ 250 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) }, 251 /* Sierra Wireless T598 */ 252 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) }, 253 { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */ 254 { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */ 255 { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */ 256 { USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */ 257 258 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */ 259 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */ 260 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */ 261 { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */ 262 { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */ 263 { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */ 264 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */ 265 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */ 266 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */ 267 { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */ 268 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */ 269 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */ 270 { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */ 271 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */ 272 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */ 273 { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */ 274 { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */ 275 { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */ 276 { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */ 277 { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */ 278 { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */ 279 /* Sierra Wireless MC8790, MC8791, MC8792 Composite */ 280 { USB_DEVICE(0x1199, 0x683C) }, 281 { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */ 282 /* Sierra Wireless MC8790, MC8791, MC8792 */ 283 { USB_DEVICE(0x1199, 0x683E) }, 284 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */ 285 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */ 286 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */ 287 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */ 288 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */ 289 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */ 290 { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */ 291 { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */ 292 /* Sierra Wireless C885 */ 293 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)}, 294 /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */ 295 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)}, 296 /* Sierra Wireless C22/C33 */ 297 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)}, 298 /* Sierra Wireless HSPA Non-Composite Device */ 299 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)}, 300 { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */ 301 { USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */ 302 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist 303 }, 304 { USB_DEVICE(0x0f3d, 0x68A3), /* Airprime/Sierra Wireless Direct IP modems */ 305 .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist 306 }, 307 { USB_DEVICE(0x413C, 0x08133) }, /* Dell Computer Corp. Wireless 5720 VZW Mobile Broadband (EVDO Rev-A) Minicard GPS Port */ 308 309 { } 310 }; 311 MODULE_DEVICE_TABLE(usb, id_table); 312 313 314 struct sierra_port_private { 315 spinlock_t lock; /* lock the structure */ 316 int outstanding_urbs; /* number of out urbs in flight */ 317 struct usb_anchor active; 318 struct usb_anchor delayed; 319 320 int num_out_urbs; 321 int num_in_urbs; 322 /* Input endpoints and buffers for this port */ 323 struct urb *in_urbs[N_IN_URB_HM]; 324 325 /* Settings for the port */ 326 int rts_state; /* Handshaking pins (outputs) */ 327 int dtr_state; 328 int cts_state; /* Handshaking pins (inputs) */ 329 int dsr_state; 330 int dcd_state; 331 int ri_state; 332 unsigned int opened:1; 333 }; 334 335 static int sierra_send_setup(struct usb_serial_port *port) 336 { 337 struct usb_serial *serial = port->serial; 338 struct sierra_port_private *portdata; 339 __u16 interface = 0; 340 int val = 0; 341 int do_send = 0; 342 int retval; 343 344 dev_dbg(&port->dev, "%s\n", __func__); 345 346 portdata = usb_get_serial_port_data(port); 347 348 if (portdata->dtr_state) 349 val |= 0x01; 350 if (portdata->rts_state) 351 val |= 0x02; 352 353 /* If composite device then properly report interface */ 354 if (serial->num_ports == 1) { 355 interface = sierra_calc_interface(serial); 356 /* Control message is sent only to interfaces with 357 * interrupt_in endpoints 358 */ 359 if (port->interrupt_in_urb) { 360 /* send control message */ 361 do_send = 1; 362 } 363 } 364 365 /* Otherwise the need to do non-composite mapping */ 366 else { 367 if (port->bulk_out_endpointAddress == 2) 368 interface = 0; 369 else if (port->bulk_out_endpointAddress == 4) 370 interface = 1; 371 else if (port->bulk_out_endpointAddress == 5) 372 interface = 2; 373 374 do_send = 1; 375 } 376 if (!do_send) 377 return 0; 378 379 retval = usb_autopm_get_interface(serial->interface); 380 if (retval < 0) 381 return retval; 382 383 retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 384 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT); 385 usb_autopm_put_interface(serial->interface); 386 387 return retval; 388 } 389 390 static void sierra_set_termios(struct tty_struct *tty, 391 struct usb_serial_port *port, struct ktermios *old_termios) 392 { 393 dev_dbg(&port->dev, "%s\n", __func__); 394 tty_termios_copy_hw(tty->termios, old_termios); 395 sierra_send_setup(port); 396 } 397 398 static int sierra_tiocmget(struct tty_struct *tty) 399 { 400 struct usb_serial_port *port = tty->driver_data; 401 unsigned int value; 402 struct sierra_port_private *portdata; 403 404 dev_dbg(&port->dev, "%s\n", __func__); 405 portdata = usb_get_serial_port_data(port); 406 407 value = ((portdata->rts_state) ? TIOCM_RTS : 0) | 408 ((portdata->dtr_state) ? TIOCM_DTR : 0) | 409 ((portdata->cts_state) ? TIOCM_CTS : 0) | 410 ((portdata->dsr_state) ? TIOCM_DSR : 0) | 411 ((portdata->dcd_state) ? TIOCM_CAR : 0) | 412 ((portdata->ri_state) ? TIOCM_RNG : 0); 413 414 return value; 415 } 416 417 static int sierra_tiocmset(struct tty_struct *tty, 418 unsigned int set, unsigned int clear) 419 { 420 struct usb_serial_port *port = tty->driver_data; 421 struct sierra_port_private *portdata; 422 423 portdata = usb_get_serial_port_data(port); 424 425 if (set & TIOCM_RTS) 426 portdata->rts_state = 1; 427 if (set & TIOCM_DTR) 428 portdata->dtr_state = 1; 429 430 if (clear & TIOCM_RTS) 431 portdata->rts_state = 0; 432 if (clear & TIOCM_DTR) 433 portdata->dtr_state = 0; 434 return sierra_send_setup(port); 435 } 436 437 static void sierra_release_urb(struct urb *urb) 438 { 439 struct usb_serial_port *port; 440 if (urb) { 441 port = urb->context; 442 dev_dbg(&port->dev, "%s: %p\n", __func__, urb); 443 kfree(urb->transfer_buffer); 444 usb_free_urb(urb); 445 } 446 } 447 448 static void sierra_outdat_callback(struct urb *urb) 449 { 450 struct usb_serial_port *port = urb->context; 451 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 452 struct sierra_intf_private *intfdata; 453 int status = urb->status; 454 455 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number); 456 intfdata = port->serial->private; 457 458 /* free up the transfer buffer, as usb_free_urb() does not do this */ 459 kfree(urb->transfer_buffer); 460 usb_autopm_put_interface_async(port->serial->interface); 461 if (status) 462 dev_dbg(&port->dev, "%s - nonzero write bulk status " 463 "received: %d\n", __func__, status); 464 465 spin_lock(&portdata->lock); 466 --portdata->outstanding_urbs; 467 spin_unlock(&portdata->lock); 468 spin_lock(&intfdata->susp_lock); 469 --intfdata->in_flight; 470 spin_unlock(&intfdata->susp_lock); 471 472 usb_serial_port_softint(port); 473 } 474 475 /* Write */ 476 static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port, 477 const unsigned char *buf, int count) 478 { 479 struct sierra_port_private *portdata; 480 struct sierra_intf_private *intfdata; 481 struct usb_serial *serial = port->serial; 482 unsigned long flags; 483 unsigned char *buffer; 484 struct urb *urb; 485 size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER); 486 int retval = 0; 487 488 /* verify that we actually have some data to write */ 489 if (count == 0) 490 return 0; 491 492 portdata = usb_get_serial_port_data(port); 493 intfdata = serial->private; 494 495 dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize); 496 spin_lock_irqsave(&portdata->lock, flags); 497 dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__, 498 portdata->outstanding_urbs); 499 if (portdata->outstanding_urbs > portdata->num_out_urbs) { 500 spin_unlock_irqrestore(&portdata->lock, flags); 501 dev_dbg(&port->dev, "%s - write limit hit\n", __func__); 502 return 0; 503 } 504 portdata->outstanding_urbs++; 505 dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__, 506 portdata->outstanding_urbs); 507 spin_unlock_irqrestore(&portdata->lock, flags); 508 509 retval = usb_autopm_get_interface_async(serial->interface); 510 if (retval < 0) { 511 spin_lock_irqsave(&portdata->lock, flags); 512 portdata->outstanding_urbs--; 513 spin_unlock_irqrestore(&portdata->lock, flags); 514 goto error_simple; 515 } 516 517 buffer = kmalloc(writesize, GFP_ATOMIC); 518 if (!buffer) { 519 dev_err(&port->dev, "out of memory\n"); 520 retval = -ENOMEM; 521 goto error_no_buffer; 522 } 523 524 urb = usb_alloc_urb(0, GFP_ATOMIC); 525 if (!urb) { 526 dev_err(&port->dev, "no more free urbs\n"); 527 retval = -ENOMEM; 528 goto error_no_urb; 529 } 530 531 memcpy(buffer, buf, writesize); 532 533 usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer); 534 535 usb_fill_bulk_urb(urb, serial->dev, 536 usb_sndbulkpipe(serial->dev, 537 port->bulk_out_endpointAddress), 538 buffer, writesize, sierra_outdat_callback, port); 539 540 /* Handle the need to send a zero length packet */ 541 urb->transfer_flags |= URB_ZERO_PACKET; 542 543 spin_lock_irqsave(&intfdata->susp_lock, flags); 544 545 if (intfdata->suspended) { 546 usb_anchor_urb(urb, &portdata->delayed); 547 spin_unlock_irqrestore(&intfdata->susp_lock, flags); 548 goto skip_power; 549 } else { 550 usb_anchor_urb(urb, &portdata->active); 551 } 552 /* send it down the pipe */ 553 retval = usb_submit_urb(urb, GFP_ATOMIC); 554 if (retval) { 555 usb_unanchor_urb(urb); 556 spin_unlock_irqrestore(&intfdata->susp_lock, flags); 557 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " 558 "with status = %d\n", __func__, retval); 559 goto error; 560 } else { 561 intfdata->in_flight++; 562 spin_unlock_irqrestore(&intfdata->susp_lock, flags); 563 } 564 565 skip_power: 566 /* we are done with this urb, so let the host driver 567 * really free it when it is finished with it */ 568 usb_free_urb(urb); 569 570 return writesize; 571 error: 572 usb_free_urb(urb); 573 error_no_urb: 574 kfree(buffer); 575 error_no_buffer: 576 spin_lock_irqsave(&portdata->lock, flags); 577 --portdata->outstanding_urbs; 578 dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__, 579 portdata->outstanding_urbs); 580 spin_unlock_irqrestore(&portdata->lock, flags); 581 usb_autopm_put_interface_async(serial->interface); 582 error_simple: 583 return retval; 584 } 585 586 static void sierra_indat_callback(struct urb *urb) 587 { 588 int err; 589 int endpoint; 590 struct usb_serial_port *port; 591 struct tty_struct *tty; 592 unsigned char *data = urb->transfer_buffer; 593 int status = urb->status; 594 595 endpoint = usb_pipeendpoint(urb->pipe); 596 port = urb->context; 597 598 dev_dbg(&port->dev, "%s: %p\n", __func__, urb); 599 600 if (status) { 601 dev_dbg(&port->dev, "%s: nonzero status: %d on" 602 " endpoint %02x\n", __func__, status, endpoint); 603 } else { 604 if (urb->actual_length) { 605 tty = tty_port_tty_get(&port->port); 606 if (tty) { 607 tty_insert_flip_string(tty, data, 608 urb->actual_length); 609 tty_flip_buffer_push(tty); 610 611 tty_kref_put(tty); 612 usb_serial_debug_data(debug, &port->dev, 613 __func__, urb->actual_length, data); 614 } 615 } else { 616 dev_dbg(&port->dev, "%s: empty read urb" 617 " received\n", __func__); 618 } 619 } 620 621 /* Resubmit urb so we continue receiving */ 622 if (status != -ESHUTDOWN && status != -EPERM) { 623 usb_mark_last_busy(port->serial->dev); 624 err = usb_submit_urb(urb, GFP_ATOMIC); 625 if (err && err != -EPERM) 626 dev_err(&port->dev, "resubmit read urb failed." 627 "(%d)\n", err); 628 } 629 } 630 631 static void sierra_instat_callback(struct urb *urb) 632 { 633 int err; 634 int status = urb->status; 635 struct usb_serial_port *port = urb->context; 636 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 637 struct usb_serial *serial = port->serial; 638 639 dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__, 640 urb, port, portdata); 641 642 if (status == 0) { 643 struct usb_ctrlrequest *req_pkt = 644 (struct usb_ctrlrequest *)urb->transfer_buffer; 645 646 if (!req_pkt) { 647 dev_dbg(&port->dev, "%s: NULL req_pkt\n", 648 __func__); 649 return; 650 } 651 if ((req_pkt->bRequestType == 0xA1) && 652 (req_pkt->bRequest == 0x20)) { 653 int old_dcd_state; 654 unsigned char signals = *((unsigned char *) 655 urb->transfer_buffer + 656 sizeof(struct usb_ctrlrequest)); 657 struct tty_struct *tty; 658 659 dev_dbg(&port->dev, "%s: signal x%x\n", __func__, 660 signals); 661 662 old_dcd_state = portdata->dcd_state; 663 portdata->cts_state = 1; 664 portdata->dcd_state = ((signals & 0x01) ? 1 : 0); 665 portdata->dsr_state = ((signals & 0x02) ? 1 : 0); 666 portdata->ri_state = ((signals & 0x08) ? 1 : 0); 667 668 tty = tty_port_tty_get(&port->port); 669 if (tty && !C_CLOCAL(tty) && 670 old_dcd_state && !portdata->dcd_state) 671 tty_hangup(tty); 672 tty_kref_put(tty); 673 } else { 674 dev_dbg(&port->dev, "%s: type %x req %x\n", 675 __func__, req_pkt->bRequestType, 676 req_pkt->bRequest); 677 } 678 } else 679 dev_dbg(&port->dev, "%s: error %d\n", __func__, status); 680 681 /* Resubmit urb so we continue receiving IRQ data */ 682 if (status != -ESHUTDOWN && status != -ENOENT) { 683 usb_mark_last_busy(serial->dev); 684 urb->dev = serial->dev; 685 err = usb_submit_urb(urb, GFP_ATOMIC); 686 if (err && err != -EPERM) 687 dev_err(&port->dev, "%s: resubmit intr urb " 688 "failed. (%d)\n", __func__, err); 689 } 690 } 691 692 static int sierra_write_room(struct tty_struct *tty) 693 { 694 struct usb_serial_port *port = tty->driver_data; 695 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 696 unsigned long flags; 697 698 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number); 699 700 /* try to give a good number back based on if we have any free urbs at 701 * this point in time */ 702 spin_lock_irqsave(&portdata->lock, flags); 703 if (portdata->outstanding_urbs > (portdata->num_out_urbs * 2) / 3) { 704 spin_unlock_irqrestore(&portdata->lock, flags); 705 dev_dbg(&port->dev, "%s - write limit hit\n", __func__); 706 return 0; 707 } 708 spin_unlock_irqrestore(&portdata->lock, flags); 709 710 return 2048; 711 } 712 713 static void sierra_stop_rx_urbs(struct usb_serial_port *port) 714 { 715 int i; 716 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 717 718 for (i = 0; i < portdata->num_in_urbs; i++) 719 usb_kill_urb(portdata->in_urbs[i]); 720 721 usb_kill_urb(port->interrupt_in_urb); 722 } 723 724 static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags) 725 { 726 int ok_cnt; 727 int err = -EINVAL; 728 int i; 729 struct urb *urb; 730 struct sierra_port_private *portdata = usb_get_serial_port_data(port); 731 732 ok_cnt = 0; 733 for (i = 0; i < portdata->num_in_urbs; i++) { 734 urb = portdata->in_urbs[i]; 735 if (!urb) 736 continue; 737 err = usb_submit_urb(urb, mem_flags); 738 if (err) { 739 dev_err(&port->dev, "%s: submit urb failed: %d\n", 740 __func__, err); 741 } else { 742 ok_cnt++; 743 } 744 } 745 746 if (ok_cnt && port->interrupt_in_urb) { 747 err = usb_submit_urb(port->interrupt_in_urb, mem_flags); 748 if (err) { 749 dev_err(&port->dev, "%s: submit intr urb failed: %d\n", 750 __func__, err); 751 } 752 } 753 754 if (ok_cnt > 0) /* at least one rx urb submitted */ 755 return 0; 756 else 757 return err; 758 } 759 760 static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint, 761 int dir, void *ctx, int len, 762 gfp_t mem_flags, 763 usb_complete_t callback) 764 { 765 struct urb *urb; 766 u8 *buf; 767 768 if (endpoint == -1) 769 return NULL; 770 771 urb = usb_alloc_urb(0, mem_flags); 772 if (urb == NULL) { 773 dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n", 774 __func__, endpoint); 775 return NULL; 776 } 777 778 buf = kmalloc(len, mem_flags); 779 if (buf) { 780 /* Fill URB using supplied data */ 781 usb_fill_bulk_urb(urb, serial->dev, 782 usb_sndbulkpipe(serial->dev, endpoint) | dir, 783 buf, len, callback, ctx); 784 785 /* debug */ 786 dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__, 787 dir == USB_DIR_IN ? 'i' : 'o', urb, buf); 788 } else { 789 dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__, 790 dir == USB_DIR_IN ? 'i' : 'o', urb, buf); 791 792 sierra_release_urb(urb); 793 urb = NULL; 794 } 795 796 return urb; 797 } 798 799 static void sierra_close(struct usb_serial_port *port) 800 { 801 int i; 802 struct usb_serial *serial = port->serial; 803 struct sierra_port_private *portdata; 804 struct sierra_intf_private *intfdata = port->serial->private; 805 806 807 dev_dbg(&port->dev, "%s\n", __func__); 808 portdata = usb_get_serial_port_data(port); 809 810 portdata->rts_state = 0; 811 portdata->dtr_state = 0; 812 813 if (serial->dev) { 814 mutex_lock(&serial->disc_mutex); 815 if (!serial->disconnected) { 816 serial->interface->needs_remote_wakeup = 0; 817 /* odd error handling due to pm counters */ 818 if (!usb_autopm_get_interface(serial->interface)) 819 sierra_send_setup(port); 820 else 821 usb_autopm_get_interface_no_resume(serial->interface); 822 823 } 824 mutex_unlock(&serial->disc_mutex); 825 spin_lock_irq(&intfdata->susp_lock); 826 portdata->opened = 0; 827 spin_unlock_irq(&intfdata->susp_lock); 828 829 830 /* Stop reading urbs */ 831 sierra_stop_rx_urbs(port); 832 /* .. and release them */ 833 for (i = 0; i < portdata->num_in_urbs; i++) { 834 sierra_release_urb(portdata->in_urbs[i]); 835 portdata->in_urbs[i] = NULL; 836 } 837 } 838 } 839 840 static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port) 841 { 842 struct sierra_port_private *portdata; 843 struct usb_serial *serial = port->serial; 844 struct sierra_intf_private *intfdata = serial->private; 845 int i; 846 int err; 847 int endpoint; 848 struct urb *urb; 849 850 portdata = usb_get_serial_port_data(port); 851 852 dev_dbg(&port->dev, "%s\n", __func__); 853 854 /* Set some sane defaults */ 855 portdata->rts_state = 1; 856 portdata->dtr_state = 1; 857 858 859 endpoint = port->bulk_in_endpointAddress; 860 for (i = 0; i < portdata->num_in_urbs; i++) { 861 urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port, 862 IN_BUFLEN, GFP_KERNEL, 863 sierra_indat_callback); 864 portdata->in_urbs[i] = urb; 865 } 866 /* clear halt condition */ 867 usb_clear_halt(serial->dev, 868 usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN); 869 870 err = sierra_submit_rx_urbs(port, GFP_KERNEL); 871 if (err) { 872 /* get rid of everything as in close */ 873 sierra_close(port); 874 /* restore balance for autopm */ 875 if (!serial->disconnected) 876 usb_autopm_put_interface(serial->interface); 877 return err; 878 } 879 sierra_send_setup(port); 880 881 serial->interface->needs_remote_wakeup = 1; 882 spin_lock_irq(&intfdata->susp_lock); 883 portdata->opened = 1; 884 spin_unlock_irq(&intfdata->susp_lock); 885 usb_autopm_put_interface(serial->interface); 886 887 return 0; 888 } 889 890 891 static void sierra_dtr_rts(struct usb_serial_port *port, int on) 892 { 893 struct usb_serial *serial = port->serial; 894 struct sierra_port_private *portdata; 895 896 portdata = usb_get_serial_port_data(port); 897 portdata->rts_state = on; 898 portdata->dtr_state = on; 899 900 if (serial->dev) { 901 mutex_lock(&serial->disc_mutex); 902 if (!serial->disconnected) 903 sierra_send_setup(port); 904 mutex_unlock(&serial->disc_mutex); 905 } 906 } 907 908 static int sierra_startup(struct usb_serial *serial) 909 { 910 struct usb_serial_port *port; 911 struct sierra_port_private *portdata; 912 struct sierra_iface_info *himemoryp = NULL; 913 int i; 914 u8 ifnum; 915 916 dev_dbg(&serial->dev->dev, "%s\n", __func__); 917 918 /* Set Device mode to D0 */ 919 sierra_set_power_state(serial->dev, 0x0000); 920 921 /* Check NMEA and set */ 922 if (nmea) 923 sierra_vsc_set_nmea(serial->dev, 1); 924 925 /* Now setup per port private data */ 926 for (i = 0; i < serial->num_ports; i++) { 927 port = serial->port[i]; 928 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL); 929 if (!portdata) { 930 dev_dbg(&port->dev, "%s: kmalloc for " 931 "sierra_port_private (%d) failed!\n", 932 __func__, i); 933 return -ENOMEM; 934 } 935 spin_lock_init(&portdata->lock); 936 init_usb_anchor(&portdata->active); 937 init_usb_anchor(&portdata->delayed); 938 ifnum = i; 939 /* Assume low memory requirements */ 940 portdata->num_out_urbs = N_OUT_URB; 941 portdata->num_in_urbs = N_IN_URB; 942 943 /* Determine actual memory requirements */ 944 if (serial->num_ports == 1) { 945 /* Get interface number for composite device */ 946 ifnum = sierra_calc_interface(serial); 947 himemoryp = 948 (struct sierra_iface_info *)&typeB_interface_list; 949 if (is_himemory(ifnum, himemoryp)) { 950 portdata->num_out_urbs = N_OUT_URB_HM; 951 portdata->num_in_urbs = N_IN_URB_HM; 952 } 953 } 954 else { 955 himemoryp = 956 (struct sierra_iface_info *)&typeA_interface_list; 957 if (is_himemory(i, himemoryp)) { 958 portdata->num_out_urbs = N_OUT_URB_HM; 959 portdata->num_in_urbs = N_IN_URB_HM; 960 } 961 } 962 dev_dbg(&serial->dev->dev, 963 "Memory usage (urbs) interface #%d, in=%d, out=%d\n", 964 ifnum,portdata->num_in_urbs, portdata->num_out_urbs ); 965 /* Set the port private data pointer */ 966 usb_set_serial_port_data(port, portdata); 967 } 968 969 return 0; 970 } 971 972 static void sierra_release(struct usb_serial *serial) 973 { 974 int i; 975 struct usb_serial_port *port; 976 struct sierra_port_private *portdata; 977 978 dev_dbg(&serial->dev->dev, "%s\n", __func__); 979 980 for (i = 0; i < serial->num_ports; ++i) { 981 port = serial->port[i]; 982 if (!port) 983 continue; 984 portdata = usb_get_serial_port_data(port); 985 if (!portdata) 986 continue; 987 kfree(portdata); 988 } 989 } 990 991 #ifdef CONFIG_PM 992 static void stop_read_write_urbs(struct usb_serial *serial) 993 { 994 int i; 995 struct usb_serial_port *port; 996 struct sierra_port_private *portdata; 997 998 /* Stop reading/writing urbs */ 999 for (i = 0; i < serial->num_ports; ++i) { 1000 port = serial->port[i]; 1001 portdata = usb_get_serial_port_data(port); 1002 sierra_stop_rx_urbs(port); 1003 usb_kill_anchored_urbs(&portdata->active); 1004 } 1005 } 1006 1007 static int sierra_suspend(struct usb_serial *serial, pm_message_t message) 1008 { 1009 struct sierra_intf_private *intfdata; 1010 int b; 1011 1012 if (message.event & PM_EVENT_AUTO) { 1013 intfdata = serial->private; 1014 spin_lock_irq(&intfdata->susp_lock); 1015 b = intfdata->in_flight; 1016 1017 if (b) { 1018 spin_unlock_irq(&intfdata->susp_lock); 1019 return -EBUSY; 1020 } else { 1021 intfdata->suspended = 1; 1022 spin_unlock_irq(&intfdata->susp_lock); 1023 } 1024 } 1025 stop_read_write_urbs(serial); 1026 1027 return 0; 1028 } 1029 1030 static int sierra_resume(struct usb_serial *serial) 1031 { 1032 struct usb_serial_port *port; 1033 struct sierra_intf_private *intfdata = serial->private; 1034 struct sierra_port_private *portdata; 1035 struct urb *urb; 1036 int ec = 0; 1037 int i, err; 1038 1039 spin_lock_irq(&intfdata->susp_lock); 1040 for (i = 0; i < serial->num_ports; i++) { 1041 port = serial->port[i]; 1042 portdata = usb_get_serial_port_data(port); 1043 1044 while ((urb = usb_get_from_anchor(&portdata->delayed))) { 1045 usb_anchor_urb(urb, &portdata->active); 1046 intfdata->in_flight++; 1047 err = usb_submit_urb(urb, GFP_ATOMIC); 1048 if (err < 0) { 1049 intfdata->in_flight--; 1050 usb_unanchor_urb(urb); 1051 usb_scuttle_anchored_urbs(&portdata->delayed); 1052 break; 1053 } 1054 } 1055 1056 if (portdata->opened) { 1057 err = sierra_submit_rx_urbs(port, GFP_ATOMIC); 1058 if (err) 1059 ec++; 1060 } 1061 } 1062 intfdata->suspended = 0; 1063 spin_unlock_irq(&intfdata->susp_lock); 1064 1065 return ec ? -EIO : 0; 1066 } 1067 1068 static int sierra_reset_resume(struct usb_interface *intf) 1069 { 1070 struct usb_serial *serial = usb_get_intfdata(intf); 1071 dev_err(&serial->dev->dev, "%s\n", __func__); 1072 return usb_serial_resume(intf); 1073 } 1074 #else 1075 #define sierra_suspend NULL 1076 #define sierra_resume NULL 1077 #define sierra_reset_resume NULL 1078 #endif 1079 1080 static struct usb_driver sierra_driver = { 1081 .name = "sierra", 1082 .probe = usb_serial_probe, 1083 .disconnect = usb_serial_disconnect, 1084 .suspend = usb_serial_suspend, 1085 .resume = usb_serial_resume, 1086 .reset_resume = sierra_reset_resume, 1087 .id_table = id_table, 1088 .no_dynamic_id = 1, 1089 .supports_autosuspend = 1, 1090 }; 1091 1092 static struct usb_serial_driver sierra_device = { 1093 .driver = { 1094 .owner = THIS_MODULE, 1095 .name = "sierra", 1096 }, 1097 .description = "Sierra USB modem", 1098 .id_table = id_table, 1099 .usb_driver = &sierra_driver, 1100 .calc_num_ports = sierra_calc_num_ports, 1101 .probe = sierra_probe, 1102 .open = sierra_open, 1103 .close = sierra_close, 1104 .dtr_rts = sierra_dtr_rts, 1105 .write = sierra_write, 1106 .write_room = sierra_write_room, 1107 .set_termios = sierra_set_termios, 1108 .tiocmget = sierra_tiocmget, 1109 .tiocmset = sierra_tiocmset, 1110 .attach = sierra_startup, 1111 .release = sierra_release, 1112 .suspend = sierra_suspend, 1113 .resume = sierra_resume, 1114 .read_int_callback = sierra_instat_callback, 1115 }; 1116 1117 /* Functions used by new usb-serial code. */ 1118 static int __init sierra_init(void) 1119 { 1120 int retval; 1121 retval = usb_serial_register(&sierra_device); 1122 if (retval) 1123 goto failed_device_register; 1124 1125 1126 retval = usb_register(&sierra_driver); 1127 if (retval) 1128 goto failed_driver_register; 1129 1130 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 1131 DRIVER_DESC "\n"); 1132 1133 return 0; 1134 1135 failed_driver_register: 1136 usb_serial_deregister(&sierra_device); 1137 failed_device_register: 1138 return retval; 1139 } 1140 1141 static void __exit sierra_exit(void) 1142 { 1143 usb_deregister(&sierra_driver); 1144 usb_serial_deregister(&sierra_device); 1145 } 1146 1147 module_init(sierra_init); 1148 module_exit(sierra_exit); 1149 1150 MODULE_AUTHOR(DRIVER_AUTHOR); 1151 MODULE_DESCRIPTION(DRIVER_DESC); 1152 MODULE_VERSION(DRIVER_VERSION); 1153 MODULE_LICENSE("GPL"); 1154 1155 module_param(nmea, bool, S_IRUGO | S_IWUSR); 1156 MODULE_PARM_DESC(nmea, "NMEA streaming"); 1157 1158 module_param(debug, bool, S_IRUGO | S_IWUSR); 1159 MODULE_PARM_DESC(debug, "Debug messages"); 1160