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