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