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

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