1 /* 2 * USB ConnectTech WhiteHEAT driver 3 * 4 * Copyright (C) 2002 5 * Connect Tech Inc. 6 * 7 * Copyright (C) 1999 - 2001 8 * Greg Kroah-Hartman (greg@kroah.com) 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * See Documentation/usb/usb-serial.txt for more information on using this driver 16 * 17 * (10/09/2002) Stuart MacDonald (stuartm@connecttech.com) 18 * Upgrade to full working driver 19 * 20 * (05/30/2001) gkh 21 * switched from using spinlock to a semaphore, which fixes lots of problems. 22 * 23 * (04/08/2001) gb 24 * Identify version on module load. 25 * 26 * 2001_Mar_19 gkh 27 * Fixed MOD_INC and MOD_DEC logic, the ability to open a port more 28 * than once, and the got the proper usb_device_id table entries so 29 * the driver works again. 30 * 31 * (11/01/2000) Adam J. Richter 32 * usb_device_id table support 33 * 34 * (10/05/2000) gkh 35 * Fixed bug with urb->dev not being set properly, now that the usb 36 * core needs it. 37 * 38 * (10/03/2000) smd 39 * firmware is improved to guard against crap sent to device 40 * firmware now replies CMD_FAILURE on bad things 41 * read_callback fix you provided for private info struct 42 * command_finished now indicates success or fail 43 * setup_port struct now packed to avoid gcc padding 44 * firmware uses 1 based port numbering, driver now handles that 45 * 46 * (09/11/2000) gkh 47 * Removed DEBUG #ifdefs with call to usb_serial_debug_data 48 * 49 * (07/19/2000) gkh 50 * Added module_init and module_exit functions to handle the fact that this 51 * driver is a loadable module now. 52 * Fixed bug with port->minor that was found by Al Borchers 53 * 54 * (07/04/2000) gkh 55 * Added support for port settings. Baud rate can now be changed. Line signals 56 * are not transferred to and from the tty layer yet, but things seem to be 57 * working well now. 58 * 59 * (05/04/2000) gkh 60 * First cut at open and close commands. Data can flow through the ports at 61 * default speeds now. 62 * 63 * (03/26/2000) gkh 64 * Split driver up into device specific pieces. 65 * 66 */ 67 68 #include <linux/kernel.h> 69 #include <linux/errno.h> 70 #include <linux/init.h> 71 #include <linux/slab.h> 72 #include <linux/tty.h> 73 #include <linux/tty_driver.h> 74 #include <linux/tty_flip.h> 75 #include <linux/module.h> 76 #include <linux/spinlock.h> 77 #include <asm/uaccess.h> 78 #include <asm/termbits.h> 79 #include <linux/usb.h> 80 #include <linux/serial_reg.h> 81 #include <linux/serial.h> 82 #include <linux/usb/serial.h> 83 #include "whiteheat_fw.h" /* firmware for the ConnectTech WhiteHEAT device */ 84 #include "whiteheat.h" /* WhiteHEAT specific commands */ 85 86 static int debug; 87 88 #ifndef CMSPAR 89 #define CMSPAR 0 90 #endif 91 92 /* 93 * Version Information 94 */ 95 #define DRIVER_VERSION "v2.0" 96 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>" 97 #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver" 98 99 #define CONNECT_TECH_VENDOR_ID 0x0710 100 #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001 101 #define CONNECT_TECH_WHITE_HEAT_ID 0x8001 102 103 /* 104 ID tables for whiteheat are unusual, because we want to different 105 things for different versions of the device. Eventually, this 106 will be doable from a single table. But, for now, we define two 107 separate ID tables, and then a third table that combines them 108 just for the purpose of exporting the autoloading information. 109 */ 110 static struct usb_device_id id_table_std [] = { 111 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) }, 112 { } /* Terminating entry */ 113 }; 114 115 static struct usb_device_id id_table_prerenumeration [] = { 116 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) }, 117 { } /* Terminating entry */ 118 }; 119 120 static struct usb_device_id id_table_combined [] = { 121 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) }, 122 { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) }, 123 { } /* Terminating entry */ 124 }; 125 126 MODULE_DEVICE_TABLE (usb, id_table_combined); 127 128 static struct usb_driver whiteheat_driver = { 129 .name = "whiteheat", 130 .probe = usb_serial_probe, 131 .disconnect = usb_serial_disconnect, 132 .id_table = id_table_combined, 133 .no_dynamic_id = 1, 134 }; 135 136 /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */ 137 static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id); 138 static int whiteheat_firmware_attach (struct usb_serial *serial); 139 140 /* function prototypes for the Connect Tech WhiteHEAT serial converter */ 141 static int whiteheat_attach (struct usb_serial *serial); 142 static void whiteheat_shutdown (struct usb_serial *serial); 143 static int whiteheat_open (struct usb_serial_port *port, struct file *filp); 144 static void whiteheat_close (struct usb_serial_port *port, struct file *filp); 145 static int whiteheat_write (struct usb_serial_port *port, const unsigned char *buf, int count); 146 static int whiteheat_write_room (struct usb_serial_port *port); 147 static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); 148 static void whiteheat_set_termios (struct usb_serial_port *port, struct ktermios * old); 149 static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file); 150 static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); 151 static void whiteheat_break_ctl (struct usb_serial_port *port, int break_state); 152 static int whiteheat_chars_in_buffer (struct usb_serial_port *port); 153 static void whiteheat_throttle (struct usb_serial_port *port); 154 static void whiteheat_unthrottle (struct usb_serial_port *port); 155 static void whiteheat_read_callback (struct urb *urb); 156 static void whiteheat_write_callback (struct urb *urb); 157 158 static struct usb_serial_driver whiteheat_fake_device = { 159 .driver = { 160 .owner = THIS_MODULE, 161 .name = "whiteheatnofirm", 162 }, 163 .description = "Connect Tech - WhiteHEAT - (prerenumeration)", 164 .usb_driver = &whiteheat_driver, 165 .id_table = id_table_prerenumeration, 166 .num_interrupt_in = NUM_DONT_CARE, 167 .num_bulk_in = NUM_DONT_CARE, 168 .num_bulk_out = NUM_DONT_CARE, 169 .num_ports = 1, 170 .probe = whiteheat_firmware_download, 171 .attach = whiteheat_firmware_attach, 172 }; 173 174 static struct usb_serial_driver whiteheat_device = { 175 .driver = { 176 .owner = THIS_MODULE, 177 .name = "whiteheat", 178 }, 179 .description = "Connect Tech - WhiteHEAT", 180 .usb_driver = &whiteheat_driver, 181 .id_table = id_table_std, 182 .num_interrupt_in = NUM_DONT_CARE, 183 .num_bulk_in = NUM_DONT_CARE, 184 .num_bulk_out = NUM_DONT_CARE, 185 .num_ports = 4, 186 .attach = whiteheat_attach, 187 .shutdown = whiteheat_shutdown, 188 .open = whiteheat_open, 189 .close = whiteheat_close, 190 .write = whiteheat_write, 191 .write_room = whiteheat_write_room, 192 .ioctl = whiteheat_ioctl, 193 .set_termios = whiteheat_set_termios, 194 .break_ctl = whiteheat_break_ctl, 195 .tiocmget = whiteheat_tiocmget, 196 .tiocmset = whiteheat_tiocmset, 197 .chars_in_buffer = whiteheat_chars_in_buffer, 198 .throttle = whiteheat_throttle, 199 .unthrottle = whiteheat_unthrottle, 200 .read_bulk_callback = whiteheat_read_callback, 201 .write_bulk_callback = whiteheat_write_callback, 202 }; 203 204 205 struct whiteheat_command_private { 206 spinlock_t lock; 207 __u8 port_running; 208 __u8 command_finished; 209 wait_queue_head_t wait_command; /* for handling sleeping while waiting for a command to finish */ 210 __u8 result_buffer[64]; 211 }; 212 213 214 #define THROTTLED 0x01 215 #define ACTUALLY_THROTTLED 0x02 216 217 static int urb_pool_size = 8; 218 219 struct whiteheat_urb_wrap { 220 struct list_head list; 221 struct urb *urb; 222 }; 223 224 struct whiteheat_private { 225 spinlock_t lock; 226 __u8 flags; 227 __u8 mcr; 228 struct list_head rx_urbs_free; 229 struct list_head rx_urbs_submitted; 230 struct list_head rx_urb_q; 231 struct work_struct rx_work; 232 struct usb_serial_port *port; 233 struct list_head tx_urbs_free; 234 struct list_head tx_urbs_submitted; 235 }; 236 237 238 /* local function prototypes */ 239 static int start_command_port(struct usb_serial *serial); 240 static void stop_command_port(struct usb_serial *serial); 241 static void command_port_write_callback(struct urb *urb); 242 static void command_port_read_callback(struct urb *urb); 243 244 static int start_port_read(struct usb_serial_port *port); 245 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head); 246 static struct list_head *list_first(struct list_head *head); 247 static void rx_data_softint(struct work_struct *work); 248 249 static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize); 250 static int firm_open(struct usb_serial_port *port); 251 static int firm_close(struct usb_serial_port *port); 252 static int firm_setup_port(struct usb_serial_port *port); 253 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff); 254 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff); 255 static int firm_set_break(struct usb_serial_port *port, __u8 onoff); 256 static int firm_purge(struct usb_serial_port *port, __u8 rxtx); 257 static int firm_get_dtr_rts(struct usb_serial_port *port); 258 static int firm_report_tx_done(struct usb_serial_port *port); 259 260 261 #define COMMAND_PORT 4 262 #define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */ 263 #define COMMAND_TIMEOUT_MS 2000 264 #define CLOSING_DELAY (30 * HZ) 265 266 267 /***************************************************************************** 268 * Connect Tech's White Heat prerenumeration driver functions 269 *****************************************************************************/ 270 271 /* steps to download the firmware to the WhiteHEAT device: 272 - hold the reset (by writing to the reset bit of the CPUCS register) 273 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD 274 - release the reset (by writing to the CPUCS register) 275 - download the WH.HEX file for all addresses greater than 0x1b3f using 276 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD 277 - hold the reset 278 - download the WH.HEX file for all addresses less than 0x1b40 using 279 VENDOR_REQUEST_ANCHOR_LOAD 280 - release the reset 281 - device renumerated itself and comes up as new device id with all 282 firmware download completed. 283 */ 284 static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id) 285 { 286 int response; 287 const struct whiteheat_hex_record *record; 288 289 dbg("%s", __FUNCTION__); 290 291 response = ezusb_set_reset (serial, 1); 292 293 record = &whiteheat_loader[0]; 294 while (record->address != 0xffff) { 295 response = ezusb_writememory (serial, record->address, 296 (unsigned char *)record->data, record->data_size, 0xa0); 297 if (response < 0) { 298 err("%s - ezusb_writememory failed for loader (%d %04X %p %d)", 299 __FUNCTION__, response, record->address, record->data, record->data_size); 300 break; 301 } 302 ++record; 303 } 304 305 response = ezusb_set_reset (serial, 0); 306 307 record = &whiteheat_firmware[0]; 308 while (record->address < 0x1b40) { 309 ++record; 310 } 311 while (record->address != 0xffff) { 312 response = ezusb_writememory (serial, record->address, 313 (unsigned char *)record->data, record->data_size, 0xa3); 314 if (response < 0) { 315 err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)", 316 __FUNCTION__, response, record->address, record->data, record->data_size); 317 break; 318 } 319 ++record; 320 } 321 322 response = ezusb_set_reset (serial, 1); 323 324 record = &whiteheat_firmware[0]; 325 while (record->address < 0x1b40) { 326 response = ezusb_writememory (serial, record->address, 327 (unsigned char *)record->data, record->data_size, 0xa0); 328 if (response < 0) { 329 err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)", 330 __FUNCTION__, response, record->address, record->data, record->data_size); 331 break; 332 } 333 ++record; 334 } 335 336 response = ezusb_set_reset (serial, 0); 337 338 return 0; 339 } 340 341 342 static int whiteheat_firmware_attach (struct usb_serial *serial) 343 { 344 /* We want this device to fail to have a driver assigned to it */ 345 return 1; 346 } 347 348 349 /***************************************************************************** 350 * Connect Tech's White Heat serial driver functions 351 *****************************************************************************/ 352 static int whiteheat_attach (struct usb_serial *serial) 353 { 354 struct usb_serial_port *command_port; 355 struct whiteheat_command_private *command_info; 356 struct usb_serial_port *port; 357 struct whiteheat_private *info; 358 struct whiteheat_hw_info *hw_info; 359 int pipe; 360 int ret; 361 int alen; 362 __u8 *command; 363 __u8 *result; 364 int i; 365 int j; 366 struct urb *urb; 367 int buf_size; 368 struct whiteheat_urb_wrap *wrap; 369 struct list_head *tmp; 370 371 command_port = serial->port[COMMAND_PORT]; 372 373 pipe = usb_sndbulkpipe (serial->dev, command_port->bulk_out_endpointAddress); 374 command = kmalloc(2, GFP_KERNEL); 375 if (!command) 376 goto no_command_buffer; 377 command[0] = WHITEHEAT_GET_HW_INFO; 378 command[1] = 0; 379 380 result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL); 381 if (!result) 382 goto no_result_buffer; 383 /* 384 * When the module is reloaded the firmware is still there and 385 * the endpoints are still in the usb core unchanged. This is the 386 * unlinking bug in disguise. Same for the call below. 387 */ 388 usb_clear_halt(serial->dev, pipe); 389 ret = usb_bulk_msg (serial->dev, pipe, command, 2, &alen, COMMAND_TIMEOUT_MS); 390 if (ret) { 391 err("%s: Couldn't send command [%d]", serial->type->description, ret); 392 goto no_firmware; 393 } else if (alen != 2) { 394 err("%s: Send command incomplete [%d]", serial->type->description, alen); 395 goto no_firmware; 396 } 397 398 pipe = usb_rcvbulkpipe (serial->dev, command_port->bulk_in_endpointAddress); 399 /* See the comment on the usb_clear_halt() above */ 400 usb_clear_halt(serial->dev, pipe); 401 ret = usb_bulk_msg (serial->dev, pipe, result, sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS); 402 if (ret) { 403 err("%s: Couldn't get results [%d]", serial->type->description, ret); 404 goto no_firmware; 405 } else if (alen != sizeof(*hw_info) + 1) { 406 err("%s: Get results incomplete [%d]", serial->type->description, alen); 407 goto no_firmware; 408 } else if (result[0] != command[0]) { 409 err("%s: Command failed [%d]", serial->type->description, result[0]); 410 goto no_firmware; 411 } 412 413 hw_info = (struct whiteheat_hw_info *)&result[1]; 414 415 info("%s: Driver %s: Firmware v%d.%02d", serial->type->description, 416 DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev); 417 418 for (i = 0; i < serial->num_ports; i++) { 419 port = serial->port[i]; 420 421 info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL); 422 if (info == NULL) { 423 err("%s: Out of memory for port structures\n", serial->type->description); 424 goto no_private; 425 } 426 427 spin_lock_init(&info->lock); 428 info->flags = 0; 429 info->mcr = 0; 430 INIT_WORK(&info->rx_work, rx_data_softint); 431 info->port = port; 432 433 INIT_LIST_HEAD(&info->rx_urbs_free); 434 INIT_LIST_HEAD(&info->rx_urbs_submitted); 435 INIT_LIST_HEAD(&info->rx_urb_q); 436 INIT_LIST_HEAD(&info->tx_urbs_free); 437 INIT_LIST_HEAD(&info->tx_urbs_submitted); 438 439 for (j = 0; j < urb_pool_size; j++) { 440 urb = usb_alloc_urb(0, GFP_KERNEL); 441 if (!urb) { 442 err("No free urbs available"); 443 goto no_rx_urb; 444 } 445 buf_size = port->read_urb->transfer_buffer_length; 446 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 447 if (!urb->transfer_buffer) { 448 err("Couldn't allocate urb buffer"); 449 goto no_rx_buf; 450 } 451 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 452 if (!wrap) { 453 err("Couldn't allocate urb wrapper"); 454 goto no_rx_wrap; 455 } 456 usb_fill_bulk_urb(urb, serial->dev, 457 usb_rcvbulkpipe(serial->dev, 458 port->bulk_in_endpointAddress), 459 urb->transfer_buffer, buf_size, 460 whiteheat_read_callback, port); 461 wrap->urb = urb; 462 list_add(&wrap->list, &info->rx_urbs_free); 463 464 urb = usb_alloc_urb(0, GFP_KERNEL); 465 if (!urb) { 466 err("No free urbs available"); 467 goto no_tx_urb; 468 } 469 buf_size = port->write_urb->transfer_buffer_length; 470 urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); 471 if (!urb->transfer_buffer) { 472 err("Couldn't allocate urb buffer"); 473 goto no_tx_buf; 474 } 475 wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); 476 if (!wrap) { 477 err("Couldn't allocate urb wrapper"); 478 goto no_tx_wrap; 479 } 480 usb_fill_bulk_urb(urb, serial->dev, 481 usb_sndbulkpipe(serial->dev, 482 port->bulk_out_endpointAddress), 483 urb->transfer_buffer, buf_size, 484 whiteheat_write_callback, port); 485 wrap->urb = urb; 486 list_add(&wrap->list, &info->tx_urbs_free); 487 } 488 489 usb_set_serial_port_data(port, info); 490 } 491 492 command_info = kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL); 493 if (command_info == NULL) { 494 err("%s: Out of memory for port structures\n", serial->type->description); 495 goto no_command_private; 496 } 497 498 spin_lock_init(&command_info->lock); 499 command_info->port_running = 0; 500 init_waitqueue_head(&command_info->wait_command); 501 usb_set_serial_port_data(command_port, command_info); 502 command_port->write_urb->complete = command_port_write_callback; 503 command_port->read_urb->complete = command_port_read_callback; 504 kfree(result); 505 kfree(command); 506 507 return 0; 508 509 no_firmware: 510 /* Firmware likely not running */ 511 err("%s: Unable to retrieve firmware version, try replugging\n", serial->type->description); 512 err("%s: If the firmware is not running (status led not blinking)\n", serial->type->description); 513 err("%s: please contact support@connecttech.com\n", serial->type->description); 514 kfree(result); 515 return -ENODEV; 516 517 no_command_private: 518 for (i = serial->num_ports - 1; i >= 0; i--) { 519 port = serial->port[i]; 520 info = usb_get_serial_port_data(port); 521 for (j = urb_pool_size - 1; j >= 0; j--) { 522 tmp = list_first(&info->tx_urbs_free); 523 list_del(tmp); 524 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 525 urb = wrap->urb; 526 kfree(wrap); 527 no_tx_wrap: 528 kfree(urb->transfer_buffer); 529 no_tx_buf: 530 usb_free_urb(urb); 531 no_tx_urb: 532 tmp = list_first(&info->rx_urbs_free); 533 list_del(tmp); 534 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 535 urb = wrap->urb; 536 kfree(wrap); 537 no_rx_wrap: 538 kfree(urb->transfer_buffer); 539 no_rx_buf: 540 usb_free_urb(urb); 541 no_rx_urb: 542 ; 543 } 544 kfree(info); 545 no_private: 546 ; 547 } 548 kfree(result); 549 no_result_buffer: 550 kfree(command); 551 no_command_buffer: 552 return -ENOMEM; 553 } 554 555 556 static void whiteheat_shutdown (struct usb_serial *serial) 557 { 558 struct usb_serial_port *command_port; 559 struct usb_serial_port *port; 560 struct whiteheat_private *info; 561 struct whiteheat_urb_wrap *wrap; 562 struct urb *urb; 563 struct list_head *tmp; 564 struct list_head *tmp2; 565 int i; 566 567 dbg("%s", __FUNCTION__); 568 569 /* free up our private data for our command port */ 570 command_port = serial->port[COMMAND_PORT]; 571 kfree (usb_get_serial_port_data(command_port)); 572 573 for (i = 0; i < serial->num_ports; i++) { 574 port = serial->port[i]; 575 info = usb_get_serial_port_data(port); 576 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 577 list_del(tmp); 578 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 579 urb = wrap->urb; 580 kfree(wrap); 581 kfree(urb->transfer_buffer); 582 usb_free_urb(urb); 583 } 584 list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) { 585 list_del(tmp); 586 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 587 urb = wrap->urb; 588 kfree(wrap); 589 kfree(urb->transfer_buffer); 590 usb_free_urb(urb); 591 } 592 kfree(info); 593 } 594 595 return; 596 } 597 598 599 static int whiteheat_open (struct usb_serial_port *port, struct file *filp) 600 { 601 int retval = 0; 602 struct ktermios old_term; 603 604 dbg("%s - port %d", __FUNCTION__, port->number); 605 606 retval = start_command_port(port->serial); 607 if (retval) 608 goto exit; 609 610 if (port->tty) 611 port->tty->low_latency = 1; 612 613 /* send an open port command */ 614 retval = firm_open(port); 615 if (retval) { 616 stop_command_port(port->serial); 617 goto exit; 618 } 619 620 retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX); 621 if (retval) { 622 firm_close(port); 623 stop_command_port(port->serial); 624 goto exit; 625 } 626 627 old_term.c_cflag = ~port->tty->termios->c_cflag; 628 old_term.c_iflag = ~port->tty->termios->c_iflag; 629 whiteheat_set_termios(port, &old_term); 630 631 /* Work around HCD bugs */ 632 usb_clear_halt(port->serial->dev, port->read_urb->pipe); 633 usb_clear_halt(port->serial->dev, port->write_urb->pipe); 634 635 /* Start reading from the device */ 636 retval = start_port_read(port); 637 if (retval) { 638 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval); 639 firm_close(port); 640 stop_command_port(port->serial); 641 goto exit; 642 } 643 644 exit: 645 dbg("%s - exit, retval = %d", __FUNCTION__, retval); 646 return retval; 647 } 648 649 650 static void whiteheat_close(struct usb_serial_port *port, struct file * filp) 651 { 652 struct whiteheat_private *info = usb_get_serial_port_data(port); 653 struct whiteheat_urb_wrap *wrap; 654 struct urb *urb; 655 struct list_head *tmp; 656 struct list_head *tmp2; 657 unsigned long flags; 658 659 dbg("%s - port %d", __FUNCTION__, port->number); 660 661 /* filp is NULL when called from usb_serial_disconnect */ 662 if (filp && (tty_hung_up_p(filp))) { 663 return; 664 } 665 666 port->tty->closing = 1; 667 668 /* 669 * Not currently in use; tty_wait_until_sent() calls 670 * serial_chars_in_buffer() which deadlocks on the second semaphore 671 * acquisition. This should be fixed at some point. Greg's been 672 * notified. 673 if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) { 674 tty_wait_until_sent(port->tty, CLOSING_DELAY); 675 } 676 */ 677 678 if (port->tty->driver->flush_buffer) 679 port->tty->driver->flush_buffer(port->tty); 680 tty_ldisc_flush(port->tty); 681 682 firm_report_tx_done(port); 683 684 firm_close(port); 685 686 /* shutdown our bulk reads and writes */ 687 spin_lock_irqsave(&info->lock, flags); 688 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 689 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 690 urb = wrap->urb; 691 usb_kill_urb(urb); 692 list_move(tmp, &info->rx_urbs_free); 693 } 694 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) 695 list_move(tmp, &info->rx_urbs_free); 696 697 list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) { 698 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 699 urb = wrap->urb; 700 usb_kill_urb(urb); 701 list_move(tmp, &info->tx_urbs_free); 702 } 703 spin_unlock_irqrestore(&info->lock, flags); 704 705 stop_command_port(port->serial); 706 707 port->tty->closing = 0; 708 } 709 710 711 static int whiteheat_write(struct usb_serial_port *port, const unsigned char *buf, int count) 712 { 713 struct usb_serial *serial = port->serial; 714 struct whiteheat_private *info = usb_get_serial_port_data(port); 715 struct whiteheat_urb_wrap *wrap; 716 struct urb *urb; 717 int result; 718 int bytes; 719 int sent = 0; 720 unsigned long flags; 721 struct list_head *tmp; 722 723 dbg("%s - port %d", __FUNCTION__, port->number); 724 725 if (count == 0) { 726 dbg("%s - write request of 0 bytes", __FUNCTION__); 727 return (0); 728 } 729 730 while (count) { 731 spin_lock_irqsave(&info->lock, flags); 732 if (list_empty(&info->tx_urbs_free)) { 733 spin_unlock_irqrestore(&info->lock, flags); 734 break; 735 } 736 tmp = list_first(&info->tx_urbs_free); 737 list_del(tmp); 738 spin_unlock_irqrestore(&info->lock, flags); 739 740 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 741 urb = wrap->urb; 742 bytes = (count > port->bulk_out_size) ? port->bulk_out_size : count; 743 memcpy (urb->transfer_buffer, buf + sent, bytes); 744 745 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, bytes, urb->transfer_buffer); 746 747 urb->dev = serial->dev; 748 urb->transfer_buffer_length = bytes; 749 result = usb_submit_urb(urb, GFP_ATOMIC); 750 if (result) { 751 err("%s - failed submitting write urb, error %d", __FUNCTION__, result); 752 sent = result; 753 spin_lock_irqsave(&info->lock, flags); 754 list_add(tmp, &info->tx_urbs_free); 755 spin_unlock_irqrestore(&info->lock, flags); 756 break; 757 } else { 758 sent += bytes; 759 count -= bytes; 760 spin_lock_irqsave(&info->lock, flags); 761 list_add(tmp, &info->tx_urbs_submitted); 762 spin_unlock_irqrestore(&info->lock, flags); 763 } 764 } 765 766 return sent; 767 } 768 769 770 static int whiteheat_write_room(struct usb_serial_port *port) 771 { 772 struct whiteheat_private *info = usb_get_serial_port_data(port); 773 struct list_head *tmp; 774 int room = 0; 775 unsigned long flags; 776 777 dbg("%s - port %d", __FUNCTION__, port->number); 778 779 spin_lock_irqsave(&info->lock, flags); 780 list_for_each(tmp, &info->tx_urbs_free) 781 room++; 782 spin_unlock_irqrestore(&info->lock, flags); 783 room *= port->bulk_out_size; 784 785 dbg("%s - returns %d", __FUNCTION__, room); 786 return (room); 787 } 788 789 790 static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file) 791 { 792 struct whiteheat_private *info = usb_get_serial_port_data(port); 793 unsigned int modem_signals = 0; 794 795 dbg("%s - port %d", __FUNCTION__, port->number); 796 797 firm_get_dtr_rts(port); 798 if (info->mcr & UART_MCR_DTR) 799 modem_signals |= TIOCM_DTR; 800 if (info->mcr & UART_MCR_RTS) 801 modem_signals |= TIOCM_RTS; 802 803 return modem_signals; 804 } 805 806 807 static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file, 808 unsigned int set, unsigned int clear) 809 { 810 struct whiteheat_private *info = usb_get_serial_port_data(port); 811 812 dbg("%s - port %d", __FUNCTION__, port->number); 813 814 if (set & TIOCM_RTS) 815 info->mcr |= UART_MCR_RTS; 816 if (set & TIOCM_DTR) 817 info->mcr |= UART_MCR_DTR; 818 819 if (clear & TIOCM_RTS) 820 info->mcr &= ~UART_MCR_RTS; 821 if (clear & TIOCM_DTR) 822 info->mcr &= ~UART_MCR_DTR; 823 824 firm_set_dtr(port, info->mcr & UART_MCR_DTR); 825 firm_set_rts(port, info->mcr & UART_MCR_RTS); 826 return 0; 827 } 828 829 830 static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) 831 { 832 struct serial_struct serstruct; 833 void __user *user_arg = (void __user *)arg; 834 835 dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); 836 837 switch (cmd) { 838 case TIOCGSERIAL: 839 memset(&serstruct, 0, sizeof(serstruct)); 840 serstruct.type = PORT_16654; 841 serstruct.line = port->serial->minor; 842 serstruct.port = port->number; 843 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 844 serstruct.xmit_fifo_size = port->bulk_out_size; 845 serstruct.custom_divisor = 0; 846 serstruct.baud_base = 460800; 847 serstruct.close_delay = CLOSING_DELAY; 848 serstruct.closing_wait = CLOSING_DELAY; 849 850 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct))) 851 return -EFAULT; 852 853 break; 854 855 case TIOCSSERIAL: 856 if (copy_from_user(&serstruct, user_arg, sizeof(serstruct))) 857 return -EFAULT; 858 859 /* 860 * For now this is ignored. dip sets the ASYNC_[V]HI flags 861 * but this isn't used by us at all. Maybe someone somewhere 862 * will need the custom_divisor setting. 863 */ 864 865 break; 866 867 default: 868 break; 869 } 870 871 return -ENOIOCTLCMD; 872 } 873 874 875 static void whiteheat_set_termios (struct usb_serial_port *port, struct ktermios *old_termios) 876 { 877 dbg("%s -port %d", __FUNCTION__, port->number); 878 879 if ((!port->tty) || (!port->tty->termios)) { 880 dbg("%s - no tty structures", __FUNCTION__); 881 goto exit; 882 } 883 884 /* check that they really want us to change something */ 885 if (old_termios) { 886 if ((port->tty->termios->c_cflag == old_termios->c_cflag) && 887 (port->tty->termios->c_iflag == old_termios->c_iflag)) { 888 dbg("%s - nothing to change...", __FUNCTION__); 889 goto exit; 890 } 891 } 892 893 firm_setup_port(port); 894 895 exit: 896 return; 897 } 898 899 900 static void whiteheat_break_ctl(struct usb_serial_port *port, int break_state) { 901 firm_set_break(port, break_state); 902 } 903 904 905 static int whiteheat_chars_in_buffer(struct usb_serial_port *port) 906 { 907 struct whiteheat_private *info = usb_get_serial_port_data(port); 908 struct list_head *tmp; 909 struct whiteheat_urb_wrap *wrap; 910 int chars = 0; 911 unsigned long flags; 912 913 dbg("%s - port %d", __FUNCTION__, port->number); 914 915 spin_lock_irqsave(&info->lock, flags); 916 list_for_each(tmp, &info->tx_urbs_submitted) { 917 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 918 chars += wrap->urb->transfer_buffer_length; 919 } 920 spin_unlock_irqrestore(&info->lock, flags); 921 922 dbg ("%s - returns %d", __FUNCTION__, chars); 923 return (chars); 924 } 925 926 927 static void whiteheat_throttle (struct usb_serial_port *port) 928 { 929 struct whiteheat_private *info = usb_get_serial_port_data(port); 930 unsigned long flags; 931 932 dbg("%s - port %d", __FUNCTION__, port->number); 933 934 spin_lock_irqsave(&info->lock, flags); 935 info->flags |= THROTTLED; 936 spin_unlock_irqrestore(&info->lock, flags); 937 938 return; 939 } 940 941 942 static void whiteheat_unthrottle (struct usb_serial_port *port) 943 { 944 struct whiteheat_private *info = usb_get_serial_port_data(port); 945 int actually_throttled; 946 unsigned long flags; 947 948 dbg("%s - port %d", __FUNCTION__, port->number); 949 950 spin_lock_irqsave(&info->lock, flags); 951 actually_throttled = info->flags & ACTUALLY_THROTTLED; 952 info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 953 spin_unlock_irqrestore(&info->lock, flags); 954 955 if (actually_throttled) 956 rx_data_softint(&info->rx_work); 957 958 return; 959 } 960 961 962 /***************************************************************************** 963 * Connect Tech's White Heat callback routines 964 *****************************************************************************/ 965 static void command_port_write_callback (struct urb *urb) 966 { 967 dbg("%s", __FUNCTION__); 968 969 if (urb->status) { 970 dbg ("nonzero urb status: %d", urb->status); 971 return; 972 } 973 } 974 975 976 static void command_port_read_callback (struct urb *urb) 977 { 978 struct usb_serial_port *command_port = (struct usb_serial_port *)urb->context; 979 struct whiteheat_command_private *command_info; 980 unsigned char *data = urb->transfer_buffer; 981 int result; 982 unsigned long flags; 983 984 dbg("%s", __FUNCTION__); 985 986 if (urb->status) { 987 dbg("%s - nonzero urb status: %d", __FUNCTION__, urb->status); 988 return; 989 } 990 991 usb_serial_debug_data(debug, &command_port->dev, __FUNCTION__, urb->actual_length, data); 992 993 command_info = usb_get_serial_port_data(command_port); 994 if (!command_info) { 995 dbg ("%s - command_info is NULL, exiting.", __FUNCTION__); 996 return; 997 } 998 spin_lock_irqsave(&command_info->lock, flags); 999 1000 if (data[0] == WHITEHEAT_CMD_COMPLETE) { 1001 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1002 wake_up_interruptible(&command_info->wait_command); 1003 } else if (data[0] == WHITEHEAT_CMD_FAILURE) { 1004 command_info->command_finished = WHITEHEAT_CMD_FAILURE; 1005 wake_up_interruptible(&command_info->wait_command); 1006 } else if (data[0] == WHITEHEAT_EVENT) { 1007 /* These are unsolicited reports from the firmware, hence no waiting command to wakeup */ 1008 dbg("%s - event received", __FUNCTION__); 1009 } else if (data[0] == WHITEHEAT_GET_DTR_RTS) { 1010 memcpy(command_info->result_buffer, &data[1], urb->actual_length - 1); 1011 command_info->command_finished = WHITEHEAT_CMD_COMPLETE; 1012 wake_up_interruptible(&command_info->wait_command); 1013 } else { 1014 dbg("%s - bad reply from firmware", __FUNCTION__); 1015 } 1016 1017 /* Continue trying to always read */ 1018 command_port->read_urb->dev = command_port->serial->dev; 1019 result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC); 1020 spin_unlock_irqrestore(&command_info->lock, flags); 1021 if (result) 1022 dbg("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 1023 } 1024 1025 1026 static void whiteheat_read_callback(struct urb *urb) 1027 { 1028 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1029 struct whiteheat_urb_wrap *wrap; 1030 unsigned char *data = urb->transfer_buffer; 1031 struct whiteheat_private *info = usb_get_serial_port_data(port); 1032 1033 dbg("%s - port %d", __FUNCTION__, port->number); 1034 1035 spin_lock(&info->lock); 1036 wrap = urb_to_wrap(urb, &info->rx_urbs_submitted); 1037 if (!wrap) { 1038 spin_unlock(&info->lock); 1039 err("%s - Not my urb!", __FUNCTION__); 1040 return; 1041 } 1042 list_del(&wrap->list); 1043 spin_unlock(&info->lock); 1044 1045 if (urb->status) { 1046 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status); 1047 spin_lock(&info->lock); 1048 list_add(&wrap->list, &info->rx_urbs_free); 1049 spin_unlock(&info->lock); 1050 return; 1051 } 1052 1053 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 1054 1055 spin_lock(&info->lock); 1056 list_add_tail(&wrap->list, &info->rx_urb_q); 1057 if (info->flags & THROTTLED) { 1058 info->flags |= ACTUALLY_THROTTLED; 1059 spin_unlock(&info->lock); 1060 return; 1061 } 1062 spin_unlock(&info->lock); 1063 1064 schedule_work(&info->rx_work); 1065 } 1066 1067 1068 static void whiteheat_write_callback(struct urb *urb) 1069 { 1070 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1071 struct whiteheat_private *info = usb_get_serial_port_data(port); 1072 struct whiteheat_urb_wrap *wrap; 1073 1074 dbg("%s - port %d", __FUNCTION__, port->number); 1075 1076 spin_lock(&info->lock); 1077 wrap = urb_to_wrap(urb, &info->tx_urbs_submitted); 1078 if (!wrap) { 1079 spin_unlock(&info->lock); 1080 err("%s - Not my urb!", __FUNCTION__); 1081 return; 1082 } 1083 list_move(&wrap->list, &info->tx_urbs_free); 1084 spin_unlock(&info->lock); 1085 1086 if (urb->status) { 1087 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); 1088 return; 1089 } 1090 1091 usb_serial_port_softint(port); 1092 } 1093 1094 1095 /***************************************************************************** 1096 * Connect Tech's White Heat firmware interface 1097 *****************************************************************************/ 1098 static int firm_send_command (struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize) 1099 { 1100 struct usb_serial_port *command_port; 1101 struct whiteheat_command_private *command_info; 1102 struct whiteheat_private *info; 1103 __u8 *transfer_buffer; 1104 int retval = 0; 1105 unsigned long flags; 1106 1107 dbg("%s - command %d", __FUNCTION__, command); 1108 1109 command_port = port->serial->port[COMMAND_PORT]; 1110 command_info = usb_get_serial_port_data(command_port); 1111 spin_lock_irqsave(&command_info->lock, flags); 1112 command_info->command_finished = FALSE; 1113 1114 transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer; 1115 transfer_buffer[0] = command; 1116 memcpy (&transfer_buffer[1], data, datasize); 1117 command_port->write_urb->transfer_buffer_length = datasize + 1; 1118 command_port->write_urb->dev = port->serial->dev; 1119 retval = usb_submit_urb (command_port->write_urb, GFP_KERNEL); 1120 if (retval) { 1121 dbg("%s - submit urb failed", __FUNCTION__); 1122 goto exit; 1123 } 1124 spin_unlock_irqrestore(&command_info->lock, flags); 1125 1126 /* wait for the command to complete */ 1127 wait_event_interruptible_timeout(command_info->wait_command, 1128 (command_info->command_finished != FALSE), COMMAND_TIMEOUT); 1129 1130 spin_lock_irqsave(&command_info->lock, flags); 1131 1132 if (command_info->command_finished == FALSE) { 1133 dbg("%s - command timed out.", __FUNCTION__); 1134 retval = -ETIMEDOUT; 1135 goto exit; 1136 } 1137 1138 if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) { 1139 dbg("%s - command failed.", __FUNCTION__); 1140 retval = -EIO; 1141 goto exit; 1142 } 1143 1144 if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) { 1145 dbg("%s - command completed.", __FUNCTION__); 1146 switch (command) { 1147 case WHITEHEAT_GET_DTR_RTS: 1148 info = usb_get_serial_port_data(port); 1149 memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info)); 1150 break; 1151 } 1152 } 1153 1154 exit: 1155 spin_unlock_irqrestore(&command_info->lock, flags); 1156 return retval; 1157 } 1158 1159 1160 static int firm_open(struct usb_serial_port *port) { 1161 struct whiteheat_simple open_command; 1162 1163 open_command.port = port->number - port->serial->minor + 1; 1164 return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command)); 1165 } 1166 1167 1168 static int firm_close(struct usb_serial_port *port) { 1169 struct whiteheat_simple close_command; 1170 1171 close_command.port = port->number - port->serial->minor + 1; 1172 return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command)); 1173 } 1174 1175 1176 static int firm_setup_port(struct usb_serial_port *port) { 1177 struct whiteheat_port_settings port_settings; 1178 unsigned int cflag = port->tty->termios->c_cflag; 1179 1180 port_settings.port = port->number + 1; 1181 1182 /* get the byte size */ 1183 switch (cflag & CSIZE) { 1184 case CS5: port_settings.bits = 5; break; 1185 case CS6: port_settings.bits = 6; break; 1186 case CS7: port_settings.bits = 7; break; 1187 default: 1188 case CS8: port_settings.bits = 8; break; 1189 } 1190 dbg("%s - data bits = %d", __FUNCTION__, port_settings.bits); 1191 1192 /* determine the parity */ 1193 if (cflag & PARENB) 1194 if (cflag & CMSPAR) 1195 if (cflag & PARODD) 1196 port_settings.parity = WHITEHEAT_PAR_MARK; 1197 else 1198 port_settings.parity = WHITEHEAT_PAR_SPACE; 1199 else 1200 if (cflag & PARODD) 1201 port_settings.parity = WHITEHEAT_PAR_ODD; 1202 else 1203 port_settings.parity = WHITEHEAT_PAR_EVEN; 1204 else 1205 port_settings.parity = WHITEHEAT_PAR_NONE; 1206 dbg("%s - parity = %c", __FUNCTION__, port_settings.parity); 1207 1208 /* figure out the stop bits requested */ 1209 if (cflag & CSTOPB) 1210 port_settings.stop = 2; 1211 else 1212 port_settings.stop = 1; 1213 dbg("%s - stop bits = %d", __FUNCTION__, port_settings.stop); 1214 1215 /* figure out the flow control settings */ 1216 if (cflag & CRTSCTS) 1217 port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS); 1218 else 1219 port_settings.hflow = WHITEHEAT_HFLOW_NONE; 1220 dbg("%s - hardware flow control = %s %s %s %s", __FUNCTION__, 1221 (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "", 1222 (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "", 1223 (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "", 1224 (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : ""); 1225 1226 /* determine software flow control */ 1227 if (I_IXOFF(port->tty)) 1228 port_settings.sflow = WHITEHEAT_SFLOW_RXTX; 1229 else 1230 port_settings.sflow = WHITEHEAT_SFLOW_NONE; 1231 dbg("%s - software flow control = %c", __FUNCTION__, port_settings.sflow); 1232 1233 port_settings.xon = START_CHAR(port->tty); 1234 port_settings.xoff = STOP_CHAR(port->tty); 1235 dbg("%s - XON = %2x, XOFF = %2x", __FUNCTION__, port_settings.xon, port_settings.xoff); 1236 1237 /* get the baud rate wanted */ 1238 port_settings.baud = tty_get_baud_rate(port->tty); 1239 dbg("%s - baud rate = %d", __FUNCTION__, port_settings.baud); 1240 1241 /* handle any settings that aren't specified in the tty structure */ 1242 port_settings.lloop = 0; 1243 1244 /* now send the message to the device */ 1245 return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings)); 1246 } 1247 1248 1249 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) { 1250 struct whiteheat_set_rdb rts_command; 1251 1252 rts_command.port = port->number - port->serial->minor + 1; 1253 rts_command.state = onoff; 1254 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command)); 1255 } 1256 1257 1258 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) { 1259 struct whiteheat_set_rdb dtr_command; 1260 1261 dtr_command.port = port->number - port->serial->minor + 1; 1262 dtr_command.state = onoff; 1263 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command)); 1264 } 1265 1266 1267 static int firm_set_break(struct usb_serial_port *port, __u8 onoff) { 1268 struct whiteheat_set_rdb break_command; 1269 1270 break_command.port = port->number - port->serial->minor + 1; 1271 break_command.state = onoff; 1272 return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command)); 1273 } 1274 1275 1276 static int firm_purge(struct usb_serial_port *port, __u8 rxtx) { 1277 struct whiteheat_purge purge_command; 1278 1279 purge_command.port = port->number - port->serial->minor + 1; 1280 purge_command.what = rxtx; 1281 return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command)); 1282 } 1283 1284 1285 static int firm_get_dtr_rts(struct usb_serial_port *port) { 1286 struct whiteheat_simple get_dr_command; 1287 1288 get_dr_command.port = port->number - port->serial->minor + 1; 1289 return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command)); 1290 } 1291 1292 1293 static int firm_report_tx_done(struct usb_serial_port *port) { 1294 struct whiteheat_simple close_command; 1295 1296 close_command.port = port->number - port->serial->minor + 1; 1297 return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command)); 1298 } 1299 1300 1301 /***************************************************************************** 1302 * Connect Tech's White Heat utility functions 1303 *****************************************************************************/ 1304 static int start_command_port(struct usb_serial *serial) 1305 { 1306 struct usb_serial_port *command_port; 1307 struct whiteheat_command_private *command_info; 1308 unsigned long flags; 1309 int retval = 0; 1310 1311 command_port = serial->port[COMMAND_PORT]; 1312 command_info = usb_get_serial_port_data(command_port); 1313 spin_lock_irqsave(&command_info->lock, flags); 1314 if (!command_info->port_running) { 1315 /* Work around HCD bugs */ 1316 usb_clear_halt(serial->dev, command_port->read_urb->pipe); 1317 1318 command_port->read_urb->dev = serial->dev; 1319 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL); 1320 if (retval) { 1321 err("%s - failed submitting read urb, error %d", __FUNCTION__, retval); 1322 goto exit; 1323 } 1324 } 1325 command_info->port_running++; 1326 1327 exit: 1328 spin_unlock_irqrestore(&command_info->lock, flags); 1329 return retval; 1330 } 1331 1332 1333 static void stop_command_port(struct usb_serial *serial) 1334 { 1335 struct usb_serial_port *command_port; 1336 struct whiteheat_command_private *command_info; 1337 unsigned long flags; 1338 1339 command_port = serial->port[COMMAND_PORT]; 1340 command_info = usb_get_serial_port_data(command_port); 1341 spin_lock_irqsave(&command_info->lock, flags); 1342 command_info->port_running--; 1343 if (!command_info->port_running) 1344 usb_kill_urb(command_port->read_urb); 1345 spin_unlock_irqrestore(&command_info->lock, flags); 1346 } 1347 1348 1349 static int start_port_read(struct usb_serial_port *port) 1350 { 1351 struct whiteheat_private *info = usb_get_serial_port_data(port); 1352 struct whiteheat_urb_wrap *wrap; 1353 struct urb *urb; 1354 int retval = 0; 1355 unsigned long flags; 1356 struct list_head *tmp; 1357 struct list_head *tmp2; 1358 1359 spin_lock_irqsave(&info->lock, flags); 1360 1361 list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { 1362 list_del(tmp); 1363 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1364 urb = wrap->urb; 1365 urb->dev = port->serial->dev; 1366 retval = usb_submit_urb(urb, GFP_KERNEL); 1367 if (retval) { 1368 list_add(tmp, &info->rx_urbs_free); 1369 list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { 1370 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1371 urb = wrap->urb; 1372 usb_kill_urb(urb); 1373 list_move(tmp, &info->rx_urbs_free); 1374 } 1375 break; 1376 } 1377 list_add(tmp, &info->rx_urbs_submitted); 1378 } 1379 1380 spin_unlock_irqrestore(&info->lock, flags); 1381 1382 return retval; 1383 } 1384 1385 1386 static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head) 1387 { 1388 struct whiteheat_urb_wrap *wrap; 1389 struct list_head *tmp; 1390 1391 list_for_each(tmp, head) { 1392 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1393 if (wrap->urb == urb) 1394 return wrap; 1395 } 1396 1397 return NULL; 1398 } 1399 1400 1401 static struct list_head *list_first(struct list_head *head) 1402 { 1403 return head->next; 1404 } 1405 1406 1407 static void rx_data_softint(struct work_struct *work) 1408 { 1409 struct whiteheat_private *info = 1410 container_of(work, struct whiteheat_private, rx_work); 1411 struct usb_serial_port *port = info->port; 1412 struct tty_struct *tty = port->tty; 1413 struct whiteheat_urb_wrap *wrap; 1414 struct urb *urb; 1415 unsigned long flags; 1416 struct list_head *tmp; 1417 struct list_head *tmp2; 1418 int result; 1419 int sent = 0; 1420 1421 spin_lock_irqsave(&info->lock, flags); 1422 if (info->flags & THROTTLED) { 1423 spin_unlock_irqrestore(&info->lock, flags); 1424 return; 1425 } 1426 1427 list_for_each_safe(tmp, tmp2, &info->rx_urb_q) { 1428 list_del(tmp); 1429 spin_unlock_irqrestore(&info->lock, flags); 1430 1431 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); 1432 urb = wrap->urb; 1433 1434 if (tty && urb->actual_length) { 1435 int len = tty_buffer_request_room(tty, urb->actual_length); 1436 /* This stuff can go away now I suspect */ 1437 if (unlikely(len < urb->actual_length)) { 1438 spin_lock_irqsave(&info->lock, flags); 1439 list_add(tmp, &info->rx_urb_q); 1440 spin_unlock_irqrestore(&info->lock, flags); 1441 tty_flip_buffer_push(tty); 1442 schedule_work(&info->rx_work); 1443 return; 1444 } 1445 tty_insert_flip_string(tty, urb->transfer_buffer, len); 1446 sent += len; 1447 } 1448 1449 urb->dev = port->serial->dev; 1450 result = usb_submit_urb(urb, GFP_ATOMIC); 1451 if (result) { 1452 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 1453 spin_lock_irqsave(&info->lock, flags); 1454 list_add(tmp, &info->rx_urbs_free); 1455 continue; 1456 } 1457 1458 spin_lock_irqsave(&info->lock, flags); 1459 list_add(tmp, &info->rx_urbs_submitted); 1460 } 1461 spin_unlock_irqrestore(&info->lock, flags); 1462 1463 if (sent) 1464 tty_flip_buffer_push(tty); 1465 } 1466 1467 1468 /***************************************************************************** 1469 * Connect Tech's White Heat module functions 1470 *****************************************************************************/ 1471 static int __init whiteheat_init (void) 1472 { 1473 int retval; 1474 retval = usb_serial_register(&whiteheat_fake_device); 1475 if (retval) 1476 goto failed_fake_register; 1477 retval = usb_serial_register(&whiteheat_device); 1478 if (retval) 1479 goto failed_device_register; 1480 retval = usb_register(&whiteheat_driver); 1481 if (retval) 1482 goto failed_usb_register; 1483 info(DRIVER_DESC " " DRIVER_VERSION); 1484 return 0; 1485 failed_usb_register: 1486 usb_serial_deregister(&whiteheat_device); 1487 failed_device_register: 1488 usb_serial_deregister(&whiteheat_fake_device); 1489 failed_fake_register: 1490 return retval; 1491 } 1492 1493 1494 static void __exit whiteheat_exit (void) 1495 { 1496 usb_deregister (&whiteheat_driver); 1497 usb_serial_deregister (&whiteheat_fake_device); 1498 usb_serial_deregister (&whiteheat_device); 1499 } 1500 1501 1502 module_init(whiteheat_init); 1503 module_exit(whiteheat_exit); 1504 1505 MODULE_AUTHOR( DRIVER_AUTHOR ); 1506 MODULE_DESCRIPTION( DRIVER_DESC ); 1507 MODULE_LICENSE("GPL"); 1508 1509 module_param(urb_pool_size, int, 0); 1510 MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering"); 1511 1512 module_param(debug, bool, S_IRUGO | S_IWUSR); 1513 MODULE_PARM_DESC(debug, "Debug enabled or not"); 1514