Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5

Linux/drivers/usb/serial/whiteheat.c

  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
 16  * driver
 17  */
 18 
 19 #include <linux/kernel.h>
 20 #include <linux/errno.h>
 21 #include <linux/slab.h>
 22 #include <linux/tty.h>
 23 #include <linux/tty_driver.h>
 24 #include <linux/tty_flip.h>
 25 #include <linux/module.h>
 26 #include <linux/spinlock.h>
 27 #include <linux/mutex.h>
 28 #include <linux/uaccess.h>
 29 #include <asm/termbits.h>
 30 #include <linux/usb.h>
 31 #include <linux/serial_reg.h>
 32 #include <linux/serial.h>
 33 #include <linux/usb/serial.h>
 34 #include <linux/usb/ezusb.h>
 35 #include "whiteheat.h"                  /* WhiteHEAT specific commands */
 36 
 37 #ifndef CMSPAR
 38 #define CMSPAR 0
 39 #endif
 40 
 41 /*
 42  * Version Information
 43  */
 44 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
 45 #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
 46 
 47 #define CONNECT_TECH_VENDOR_ID          0x0710
 48 #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
 49 #define CONNECT_TECH_WHITE_HEAT_ID      0x8001
 50 
 51 /*
 52    ID tables for whiteheat are unusual, because we want to different
 53    things for different versions of the device.  Eventually, this
 54    will be doable from a single table.  But, for now, we define two
 55    separate ID tables, and then a third table that combines them
 56    just for the purpose of exporting the autoloading information.
 57 */
 58 static const struct usb_device_id id_table_std[] = {
 59         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
 60         { }                                             /* Terminating entry */
 61 };
 62 
 63 static const struct usb_device_id id_table_prerenumeration[] = {
 64         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
 65         { }                                             /* Terminating entry */
 66 };
 67 
 68 static const struct usb_device_id id_table_combined[] = {
 69         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
 70         { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
 71         { }                                             /* Terminating entry */
 72 };
 73 
 74 MODULE_DEVICE_TABLE(usb, id_table_combined);
 75 
 76 
 77 /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
 78 static int  whiteheat_firmware_download(struct usb_serial *serial,
 79                                         const struct usb_device_id *id);
 80 static int  whiteheat_firmware_attach(struct usb_serial *serial);
 81 
 82 /* function prototypes for the Connect Tech WhiteHEAT serial converter */
 83 static int whiteheat_probe(struct usb_serial *serial,
 84                                 const struct usb_device_id *id);
 85 static int  whiteheat_attach(struct usb_serial *serial);
 86 static void whiteheat_release(struct usb_serial *serial);
 87 static int  whiteheat_port_probe(struct usb_serial_port *port);
 88 static int  whiteheat_port_remove(struct usb_serial_port *port);
 89 static int  whiteheat_open(struct tty_struct *tty,
 90                         struct usb_serial_port *port);
 91 static void whiteheat_close(struct usb_serial_port *port);
 92 static int  whiteheat_ioctl(struct tty_struct *tty,
 93                         unsigned int cmd, unsigned long arg);
 94 static void whiteheat_set_termios(struct tty_struct *tty,
 95                         struct usb_serial_port *port, struct ktermios *old);
 96 static int  whiteheat_tiocmget(struct tty_struct *tty);
 97 static int  whiteheat_tiocmset(struct tty_struct *tty,
 98                         unsigned int set, unsigned int clear);
 99 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state);
100 
101 static struct usb_serial_driver whiteheat_fake_device = {
102         .driver = {
103                 .owner =        THIS_MODULE,
104                 .name =         "whiteheatnofirm",
105         },
106         .description =          "Connect Tech - WhiteHEAT - (prerenumeration)",
107         .id_table =             id_table_prerenumeration,
108         .num_ports =            1,
109         .probe =                whiteheat_firmware_download,
110         .attach =               whiteheat_firmware_attach,
111 };
112 
113 static struct usb_serial_driver whiteheat_device = {
114         .driver = {
115                 .owner =        THIS_MODULE,
116                 .name =         "whiteheat",
117         },
118         .description =          "Connect Tech - WhiteHEAT",
119         .id_table =             id_table_std,
120         .num_ports =            4,
121         .probe =                whiteheat_probe,
122         .attach =               whiteheat_attach,
123         .release =              whiteheat_release,
124         .port_probe =           whiteheat_port_probe,
125         .port_remove =          whiteheat_port_remove,
126         .open =                 whiteheat_open,
127         .close =                whiteheat_close,
128         .ioctl =                whiteheat_ioctl,
129         .set_termios =          whiteheat_set_termios,
130         .break_ctl =            whiteheat_break_ctl,
131         .tiocmget =             whiteheat_tiocmget,
132         .tiocmset =             whiteheat_tiocmset,
133         .throttle =             usb_serial_generic_throttle,
134         .unthrottle =           usb_serial_generic_unthrottle,
135 };
136 
137 static struct usb_serial_driver * const serial_drivers[] = {
138         &whiteheat_fake_device, &whiteheat_device, NULL
139 };
140 
141 struct whiteheat_command_private {
142         struct mutex            mutex;
143         __u8                    port_running;
144         __u8                    command_finished;
145         wait_queue_head_t       wait_command; /* for handling sleeping whilst
146                                                  waiting for a command to
147                                                  finish */
148         __u8                    result_buffer[64];
149 };
150 
151 struct whiteheat_private {
152         __u8                    mcr;            /* FIXME: no locking on mcr */
153 };
154 
155 
156 /* local function prototypes */
157 static int start_command_port(struct usb_serial *serial);
158 static void stop_command_port(struct usb_serial *serial);
159 static void command_port_write_callback(struct urb *urb);
160 static void command_port_read_callback(struct urb *urb);
161 
162 static int firm_send_command(struct usb_serial_port *port, __u8 command,
163                                                 __u8 *data, __u8 datasize);
164 static int firm_open(struct usb_serial_port *port);
165 static int firm_close(struct usb_serial_port *port);
166 static void firm_setup_port(struct tty_struct *tty);
167 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
168 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
169 static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
170 static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
171 static int firm_get_dtr_rts(struct usb_serial_port *port);
172 static int firm_report_tx_done(struct usb_serial_port *port);
173 
174 
175 #define COMMAND_PORT            4
176 #define COMMAND_TIMEOUT         (2*HZ)  /* 2 second timeout for a command */
177 #define COMMAND_TIMEOUT_MS      2000
178 #define CLOSING_DELAY           (30 * HZ)
179 
180 
181 /*****************************************************************************
182  * Connect Tech's White Heat prerenumeration driver functions
183  *****************************************************************************/
184 
185 /* steps to download the firmware to the WhiteHEAT device:
186  - hold the reset (by writing to the reset bit of the CPUCS register)
187  - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
188  - release the reset (by writing to the CPUCS register)
189  - download the WH.HEX file for all addresses greater than 0x1b3f using
190    VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
191  - hold the reset
192  - download the WH.HEX file for all addresses less than 0x1b40 using
193    VENDOR_REQUEST_ANCHOR_LOAD
194  - release the reset
195  - device renumerated itself and comes up as new device id with all
196    firmware download completed.
197 */
198 static int whiteheat_firmware_download(struct usb_serial *serial,
199                                         const struct usb_device_id *id)
200 {
201         int response;
202 
203         response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat_loader.fw");
204         if (response >= 0) {
205                 response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat.fw");
206                 if (response >= 0)
207                         return 0;
208         }
209         return -ENOENT;
210 }
211 
212 
213 static int whiteheat_firmware_attach(struct usb_serial *serial)
214 {
215         /* We want this device to fail to have a driver assigned to it */
216         return 1;
217 }
218 
219 
220 /*****************************************************************************
221  * Connect Tech's White Heat serial driver functions
222  *****************************************************************************/
223 
224 static int whiteheat_probe(struct usb_serial *serial,
225                                 const struct usb_device_id *id)
226 {
227         struct usb_host_interface *iface_desc;
228         struct usb_endpoint_descriptor *endpoint;
229         size_t num_bulk_in = 0;
230         size_t num_bulk_out = 0;
231         size_t min_num_bulk;
232         unsigned int i;
233 
234         iface_desc = serial->interface->cur_altsetting;
235 
236         for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
237                 endpoint = &iface_desc->endpoint[i].desc;
238                 if (usb_endpoint_is_bulk_in(endpoint))
239                         ++num_bulk_in;
240                 if (usb_endpoint_is_bulk_out(endpoint))
241                         ++num_bulk_out;
242         }
243 
244         min_num_bulk = COMMAND_PORT + 1;
245         if (num_bulk_in < min_num_bulk || num_bulk_out < min_num_bulk)
246                 return -ENODEV;
247 
248         return 0;
249 }
250 
251 static int whiteheat_attach(struct usb_serial *serial)
252 {
253         struct usb_serial_port *command_port;
254         struct whiteheat_command_private *command_info;
255         struct whiteheat_hw_info *hw_info;
256         int pipe;
257         int ret;
258         int alen;
259         __u8 *command;
260         __u8 *result;
261 
262         command_port = serial->port[COMMAND_PORT];
263 
264         pipe = usb_sndbulkpipe(serial->dev,
265                         command_port->bulk_out_endpointAddress);
266         command = kmalloc(2, GFP_KERNEL);
267         if (!command)
268                 goto no_command_buffer;
269         command[0] = WHITEHEAT_GET_HW_INFO;
270         command[1] = 0;
271 
272         result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
273         if (!result)
274                 goto no_result_buffer;
275         /*
276          * When the module is reloaded the firmware is still there and
277          * the endpoints are still in the usb core unchanged. This is the
278          * unlinking bug in disguise. Same for the call below.
279          */
280         usb_clear_halt(serial->dev, pipe);
281         ret = usb_bulk_msg(serial->dev, pipe, command, 2,
282                                                 &alen, COMMAND_TIMEOUT_MS);
283         if (ret) {
284                 dev_err(&serial->dev->dev, "%s: Couldn't send command [%d]\n",
285                         serial->type->description, ret);
286                 goto no_firmware;
287         } else if (alen != 2) {
288                 dev_err(&serial->dev->dev, "%s: Send command incomplete [%d]\n",
289                         serial->type->description, alen);
290                 goto no_firmware;
291         }
292 
293         pipe = usb_rcvbulkpipe(serial->dev,
294                                 command_port->bulk_in_endpointAddress);
295         /* See the comment on the usb_clear_halt() above */
296         usb_clear_halt(serial->dev, pipe);
297         ret = usb_bulk_msg(serial->dev, pipe, result,
298                         sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
299         if (ret) {
300                 dev_err(&serial->dev->dev, "%s: Couldn't get results [%d]\n",
301                         serial->type->description, ret);
302                 goto no_firmware;
303         } else if (alen != sizeof(*hw_info) + 1) {
304                 dev_err(&serial->dev->dev, "%s: Get results incomplete [%d]\n",
305                         serial->type->description, alen);
306                 goto no_firmware;
307         } else if (result[0] != command[0]) {
308                 dev_err(&serial->dev->dev, "%s: Command failed [%d]\n",
309                         serial->type->description, result[0]);
310                 goto no_firmware;
311         }
312 
313         hw_info = (struct whiteheat_hw_info *)&result[1];
314 
315         dev_info(&serial->dev->dev, "%s: Firmware v%d.%02d\n",
316                  serial->type->description,
317                  hw_info->sw_major_rev, hw_info->sw_minor_rev);
318 
319         command_info = kmalloc(sizeof(struct whiteheat_command_private),
320                                                                 GFP_KERNEL);
321         if (!command_info)
322                 goto no_command_private;
323 
324         mutex_init(&command_info->mutex);
325         command_info->port_running = 0;
326         init_waitqueue_head(&command_info->wait_command);
327         usb_set_serial_port_data(command_port, command_info);
328         command_port->write_urb->complete = command_port_write_callback;
329         command_port->read_urb->complete = command_port_read_callback;
330         kfree(result);
331         kfree(command);
332 
333         return 0;
334 
335 no_firmware:
336         /* Firmware likely not running */
337         dev_err(&serial->dev->dev,
338                 "%s: Unable to retrieve firmware version, try replugging\n",
339                 serial->type->description);
340         dev_err(&serial->dev->dev,
341                 "%s: If the firmware is not running (status led not blinking)\n",
342                 serial->type->description);
343         dev_err(&serial->dev->dev,
344                 "%s: please contact support@connecttech.com\n",
345                 serial->type->description);
346         kfree(result);
347         kfree(command);
348         return -ENODEV;
349 
350 no_command_private:
351         kfree(result);
352 no_result_buffer:
353         kfree(command);
354 no_command_buffer:
355         return -ENOMEM;
356 }
357 
358 static void whiteheat_release(struct usb_serial *serial)
359 {
360         struct usb_serial_port *command_port;
361 
362         /* free up our private data for our command port */
363         command_port = serial->port[COMMAND_PORT];
364         kfree(usb_get_serial_port_data(command_port));
365 }
366 
367 static int whiteheat_port_probe(struct usb_serial_port *port)
368 {
369         struct whiteheat_private *info;
370 
371         info = kzalloc(sizeof(*info), GFP_KERNEL);
372         if (!info)
373                 return -ENOMEM;
374 
375         usb_set_serial_port_data(port, info);
376 
377         return 0;
378 }
379 
380 static int whiteheat_port_remove(struct usb_serial_port *port)
381 {
382         struct whiteheat_private *info;
383 
384         info = usb_get_serial_port_data(port);
385         kfree(info);
386 
387         return 0;
388 }
389 
390 static int whiteheat_open(struct tty_struct *tty, struct usb_serial_port *port)
391 {
392         int retval;
393 
394         retval = start_command_port(port->serial);
395         if (retval)
396                 goto exit;
397 
398         /* send an open port command */
399         retval = firm_open(port);
400         if (retval) {
401                 stop_command_port(port->serial);
402                 goto exit;
403         }
404 
405         retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
406         if (retval) {
407                 firm_close(port);
408                 stop_command_port(port->serial);
409                 goto exit;
410         }
411 
412         if (tty)
413                 firm_setup_port(tty);
414 
415         /* Work around HCD bugs */
416         usb_clear_halt(port->serial->dev, port->read_urb->pipe);
417         usb_clear_halt(port->serial->dev, port->write_urb->pipe);
418 
419         retval = usb_serial_generic_open(tty, port);
420         if (retval) {
421                 firm_close(port);
422                 stop_command_port(port->serial);
423                 goto exit;
424         }
425 exit:
426         return retval;
427 }
428 
429 
430 static void whiteheat_close(struct usb_serial_port *port)
431 {
432         firm_report_tx_done(port);
433         firm_close(port);
434 
435         usb_serial_generic_close(port);
436 
437         stop_command_port(port->serial);
438 }
439 
440 static int whiteheat_tiocmget(struct tty_struct *tty)
441 {
442         struct usb_serial_port *port = tty->driver_data;
443         struct whiteheat_private *info = usb_get_serial_port_data(port);
444         unsigned int modem_signals = 0;
445 
446         firm_get_dtr_rts(port);
447         if (info->mcr & UART_MCR_DTR)
448                 modem_signals |= TIOCM_DTR;
449         if (info->mcr & UART_MCR_RTS)
450                 modem_signals |= TIOCM_RTS;
451 
452         return modem_signals;
453 }
454 
455 static int whiteheat_tiocmset(struct tty_struct *tty,
456                                unsigned int set, unsigned int clear)
457 {
458         struct usb_serial_port *port = tty->driver_data;
459         struct whiteheat_private *info = usb_get_serial_port_data(port);
460 
461         if (set & TIOCM_RTS)
462                 info->mcr |= UART_MCR_RTS;
463         if (set & TIOCM_DTR)
464                 info->mcr |= UART_MCR_DTR;
465 
466         if (clear & TIOCM_RTS)
467                 info->mcr &= ~UART_MCR_RTS;
468         if (clear & TIOCM_DTR)
469                 info->mcr &= ~UART_MCR_DTR;
470 
471         firm_set_dtr(port, info->mcr & UART_MCR_DTR);
472         firm_set_rts(port, info->mcr & UART_MCR_RTS);
473         return 0;
474 }
475 
476 
477 static int whiteheat_ioctl(struct tty_struct *tty,
478                                         unsigned int cmd, unsigned long arg)
479 {
480         struct usb_serial_port *port = tty->driver_data;
481         struct serial_struct serstruct;
482         void __user *user_arg = (void __user *)arg;
483 
484         switch (cmd) {
485         case TIOCGSERIAL:
486                 memset(&serstruct, 0, sizeof(serstruct));
487                 serstruct.type = PORT_16654;
488                 serstruct.line = port->minor;
489                 serstruct.port = port->port_number;
490                 serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
491                 serstruct.xmit_fifo_size = kfifo_size(&port->write_fifo);
492                 serstruct.custom_divisor = 0;
493                 serstruct.baud_base = 460800;
494                 serstruct.close_delay = CLOSING_DELAY;
495                 serstruct.closing_wait = CLOSING_DELAY;
496 
497                 if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
498                         return -EFAULT;
499                 break;
500         default:
501                 break;
502         }
503 
504         return -ENOIOCTLCMD;
505 }
506 
507 
508 static void whiteheat_set_termios(struct tty_struct *tty,
509         struct usb_serial_port *port, struct ktermios *old_termios)
510 {
511         firm_setup_port(tty);
512 }
513 
514 static void whiteheat_break_ctl(struct tty_struct *tty, int break_state)
515 {
516         struct usb_serial_port *port = tty->driver_data;
517         firm_set_break(port, break_state);
518 }
519 
520 
521 /*****************************************************************************
522  * Connect Tech's White Heat callback routines
523  *****************************************************************************/
524 static void command_port_write_callback(struct urb *urb)
525 {
526         int status = urb->status;
527 
528         if (status) {
529                 dev_dbg(&urb->dev->dev, "nonzero urb status: %d\n", status);
530                 return;
531         }
532 }
533 
534 
535 static void command_port_read_callback(struct urb *urb)
536 {
537         struct usb_serial_port *command_port = urb->context;
538         struct whiteheat_command_private *command_info;
539         int status = urb->status;
540         unsigned char *data = urb->transfer_buffer;
541         int result;
542 
543         command_info = usb_get_serial_port_data(command_port);
544         if (!command_info) {
545                 dev_dbg(&urb->dev->dev, "%s - command_info is NULL, exiting.\n", __func__);
546                 return;
547         }
548         if (!urb->actual_length) {
549                 dev_dbg(&urb->dev->dev, "%s - empty response, exiting.\n", __func__);
550                 return;
551         }
552         if (status) {
553                 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n", __func__, status);
554                 if (status != -ENOENT)
555                         command_info->command_finished = WHITEHEAT_CMD_FAILURE;
556                 wake_up(&command_info->wait_command);
557                 return;
558         }
559 
560         usb_serial_debug_data(&command_port->dev, __func__, urb->actual_length, data);
561 
562         if (data[0] == WHITEHEAT_CMD_COMPLETE) {
563                 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
564                 wake_up(&command_info->wait_command);
565         } else if (data[0] == WHITEHEAT_CMD_FAILURE) {
566                 command_info->command_finished = WHITEHEAT_CMD_FAILURE;
567                 wake_up(&command_info->wait_command);
568         } else if (data[0] == WHITEHEAT_EVENT) {
569                 /* These are unsolicited reports from the firmware, hence no
570                    waiting command to wakeup */
571                 dev_dbg(&urb->dev->dev, "%s - event received\n", __func__);
572         } else if ((data[0] == WHITEHEAT_GET_DTR_RTS) &&
573                 (urb->actual_length - 1 <= sizeof(command_info->result_buffer))) {
574                 memcpy(command_info->result_buffer, &data[1],
575                                                 urb->actual_length - 1);
576                 command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
577                 wake_up(&command_info->wait_command);
578         } else
579                 dev_dbg(&urb->dev->dev, "%s - bad reply from firmware\n", __func__);
580 
581         /* Continue trying to always read */
582         result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
583         if (result)
584                 dev_dbg(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n",
585                         __func__, result);
586 }
587 
588 
589 /*****************************************************************************
590  * Connect Tech's White Heat firmware interface
591  *****************************************************************************/
592 static int firm_send_command(struct usb_serial_port *port, __u8 command,
593                                                 __u8 *data, __u8 datasize)
594 {
595         struct usb_serial_port *command_port;
596         struct whiteheat_command_private *command_info;
597         struct whiteheat_private *info;
598         struct device *dev = &port->dev;
599         __u8 *transfer_buffer;
600         int retval = 0;
601         int t;
602 
603         dev_dbg(dev, "%s - command %d\n", __func__, command);
604 
605         command_port = port->serial->port[COMMAND_PORT];
606         command_info = usb_get_serial_port_data(command_port);
607         mutex_lock(&command_info->mutex);
608         command_info->command_finished = false;
609 
610         transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
611         transfer_buffer[0] = command;
612         memcpy(&transfer_buffer[1], data, datasize);
613         command_port->write_urb->transfer_buffer_length = datasize + 1;
614         retval = usb_submit_urb(command_port->write_urb, GFP_NOIO);
615         if (retval) {
616                 dev_dbg(dev, "%s - submit urb failed\n", __func__);
617                 goto exit;
618         }
619 
620         /* wait for the command to complete */
621         t = wait_event_timeout(command_info->wait_command,
622                 (bool)command_info->command_finished, COMMAND_TIMEOUT);
623         if (!t)
624                 usb_kill_urb(command_port->write_urb);
625 
626         if (command_info->command_finished == false) {
627                 dev_dbg(dev, "%s - command timed out.\n", __func__);
628                 retval = -ETIMEDOUT;
629                 goto exit;
630         }
631 
632         if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
633                 dev_dbg(dev, "%s - command failed.\n", __func__);
634                 retval = -EIO;
635                 goto exit;
636         }
637 
638         if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
639                 dev_dbg(dev, "%s - command completed.\n", __func__);
640                 switch (command) {
641                 case WHITEHEAT_GET_DTR_RTS:
642                         info = usb_get_serial_port_data(port);
643                         memcpy(&info->mcr, command_info->result_buffer,
644                                         sizeof(struct whiteheat_dr_info));
645                                 break;
646                 }
647         }
648 exit:
649         mutex_unlock(&command_info->mutex);
650         return retval;
651 }
652 
653 
654 static int firm_open(struct usb_serial_port *port)
655 {
656         struct whiteheat_simple open_command;
657 
658         open_command.port = port->port_number + 1;
659         return firm_send_command(port, WHITEHEAT_OPEN,
660                 (__u8 *)&open_command, sizeof(open_command));
661 }
662 
663 
664 static int firm_close(struct usb_serial_port *port)
665 {
666         struct whiteheat_simple close_command;
667 
668         close_command.port = port->port_number + 1;
669         return firm_send_command(port, WHITEHEAT_CLOSE,
670                         (__u8 *)&close_command, sizeof(close_command));
671 }
672 
673 
674 static void firm_setup_port(struct tty_struct *tty)
675 {
676         struct usb_serial_port *port = tty->driver_data;
677         struct device *dev = &port->dev;
678         struct whiteheat_port_settings port_settings;
679         unsigned int cflag = tty->termios.c_cflag;
680 
681         port_settings.port = port->port_number + 1;
682 
683         /* get the byte size */
684         switch (cflag & CSIZE) {
685         case CS5:       port_settings.bits = 5;   break;
686         case CS6:       port_settings.bits = 6;   break;
687         case CS7:       port_settings.bits = 7;   break;
688         default:
689         case CS8:       port_settings.bits = 8;   break;
690         }
691         dev_dbg(dev, "%s - data bits = %d\n", __func__, port_settings.bits);
692 
693         /* determine the parity */
694         if (cflag & PARENB)
695                 if (cflag & CMSPAR)
696                         if (cflag & PARODD)
697                                 port_settings.parity = WHITEHEAT_PAR_MARK;
698                         else
699                                 port_settings.parity = WHITEHEAT_PAR_SPACE;
700                 else
701                         if (cflag & PARODD)
702                                 port_settings.parity = WHITEHEAT_PAR_ODD;
703                         else
704                                 port_settings.parity = WHITEHEAT_PAR_EVEN;
705         else
706                 port_settings.parity = WHITEHEAT_PAR_NONE;
707         dev_dbg(dev, "%s - parity = %c\n", __func__, port_settings.parity);
708 
709         /* figure out the stop bits requested */
710         if (cflag & CSTOPB)
711                 port_settings.stop = 2;
712         else
713                 port_settings.stop = 1;
714         dev_dbg(dev, "%s - stop bits = %d\n", __func__, port_settings.stop);
715 
716         /* figure out the flow control settings */
717         if (cflag & CRTSCTS)
718                 port_settings.hflow = (WHITEHEAT_HFLOW_CTS |
719                                                 WHITEHEAT_HFLOW_RTS);
720         else
721                 port_settings.hflow = WHITEHEAT_HFLOW_NONE;
722         dev_dbg(dev, "%s - hardware flow control = %s %s %s %s\n", __func__,
723             (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
724             (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
725             (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
726             (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
727 
728         /* determine software flow control */
729         if (I_IXOFF(tty))
730                 port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
731         else
732                 port_settings.sflow = WHITEHEAT_SFLOW_NONE;
733         dev_dbg(dev, "%s - software flow control = %c\n", __func__, port_settings.sflow);
734 
735         port_settings.xon = START_CHAR(tty);
736         port_settings.xoff = STOP_CHAR(tty);
737         dev_dbg(dev, "%s - XON = %2x, XOFF = %2x\n", __func__, port_settings.xon, port_settings.xoff);
738 
739         /* get the baud rate wanted */
740         port_settings.baud = tty_get_baud_rate(tty);
741         dev_dbg(dev, "%s - baud rate = %d\n", __func__, port_settings.baud);
742 
743         /* fixme: should set validated settings */
744         tty_encode_baud_rate(tty, port_settings.baud, port_settings.baud);
745         /* handle any settings that aren't specified in the tty structure */
746         port_settings.lloop = 0;
747 
748         /* now send the message to the device */
749         firm_send_command(port, WHITEHEAT_SETUP_PORT,
750                         (__u8 *)&port_settings, sizeof(port_settings));
751 }
752 
753 
754 static int firm_set_rts(struct usb_serial_port *port, __u8 onoff)
755 {
756         struct whiteheat_set_rdb rts_command;
757 
758         rts_command.port = port->port_number + 1;
759         rts_command.state = onoff;
760         return firm_send_command(port, WHITEHEAT_SET_RTS,
761                         (__u8 *)&rts_command, sizeof(rts_command));
762 }
763 
764 
765 static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff)
766 {
767         struct whiteheat_set_rdb dtr_command;
768 
769         dtr_command.port = port->port_number + 1;
770         dtr_command.state = onoff;
771         return firm_send_command(port, WHITEHEAT_SET_DTR,
772                         (__u8 *)&dtr_command, sizeof(dtr_command));
773 }
774 
775 
776 static int firm_set_break(struct usb_serial_port *port, __u8 onoff)
777 {
778         struct whiteheat_set_rdb break_command;
779 
780         break_command.port = port->port_number + 1;
781         break_command.state = onoff;
782         return firm_send_command(port, WHITEHEAT_SET_BREAK,
783                         (__u8 *)&break_command, sizeof(break_command));
784 }
785 
786 
787 static int firm_purge(struct usb_serial_port *port, __u8 rxtx)
788 {
789         struct whiteheat_purge purge_command;
790 
791         purge_command.port = port->port_number + 1;
792         purge_command.what = rxtx;
793         return firm_send_command(port, WHITEHEAT_PURGE,
794                         (__u8 *)&purge_command, sizeof(purge_command));
795 }
796 
797 
798 static int firm_get_dtr_rts(struct usb_serial_port *port)
799 {
800         struct whiteheat_simple get_dr_command;
801 
802         get_dr_command.port = port->port_number + 1;
803         return firm_send_command(port, WHITEHEAT_GET_DTR_RTS,
804                         (__u8 *)&get_dr_command, sizeof(get_dr_command));
805 }
806 
807 
808 static int firm_report_tx_done(struct usb_serial_port *port)
809 {
810         struct whiteheat_simple close_command;
811 
812         close_command.port = port->port_number + 1;
813         return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE,
814                         (__u8 *)&close_command, sizeof(close_command));
815 }
816 
817 
818 /*****************************************************************************
819  * Connect Tech's White Heat utility functions
820  *****************************************************************************/
821 static int start_command_port(struct usb_serial *serial)
822 {
823         struct usb_serial_port *command_port;
824         struct whiteheat_command_private *command_info;
825         int retval = 0;
826 
827         command_port = serial->port[COMMAND_PORT];
828         command_info = usb_get_serial_port_data(command_port);
829         mutex_lock(&command_info->mutex);
830         if (!command_info->port_running) {
831                 /* Work around HCD bugs */
832                 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
833 
834                 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
835                 if (retval) {
836                         dev_err(&serial->dev->dev,
837                                 "%s - failed submitting read urb, error %d\n",
838                                 __func__, retval);
839                         goto exit;
840                 }
841         }
842         command_info->port_running++;
843 
844 exit:
845         mutex_unlock(&command_info->mutex);
846         return retval;
847 }
848 
849 
850 static void stop_command_port(struct usb_serial *serial)
851 {
852         struct usb_serial_port *command_port;
853         struct whiteheat_command_private *command_info;
854 
855         command_port = serial->port[COMMAND_PORT];
856         command_info = usb_get_serial_port_data(command_port);
857         mutex_lock(&command_info->mutex);
858         command_info->port_running--;
859         if (!command_info->port_running)
860                 usb_kill_urb(command_port->read_urb);
861         mutex_unlock(&command_info->mutex);
862 }
863 
864 module_usb_serial_driver(serial_drivers, id_table_combined);
865 
866 MODULE_AUTHOR(DRIVER_AUTHOR);
867 MODULE_DESCRIPTION(DRIVER_DESC);
868 MODULE_LICENSE("GPL");
869 
870 MODULE_FIRMWARE("whiteheat.fw");
871 MODULE_FIRMWARE("whiteheat_loader.fw");
872 

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