?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH] USB: move usb-serial.h to include/linux/usb/
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / serial / cypress_m8.c
blobee70fddcab6031a8f1c045da4e71c09b3c4d1f9b
1 /*
2 * USB Cypress M8 driver
3 *
4 * Copyright (C) 2004
5 * Lonnie Mendez (dignome@gmail.com)
6 * Copyright (C) 2003,2004
7 * Neil Whelchel (koyama@firstlight.net)
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * See Documentation/usb/usb-serial.txt for more information on using this driver
15 *
16 * See http://geocities.com/i0xox0i for information on this driver and the
17 * earthmate usb device.
18 *
19 * Lonnie Mendez <dignome@gmail.com>
20 * 4-29-2005
21 * Fixed problem where setting or retreiving the serial config would fail with
22 * EPIPE. Removed CRTS toggling so the driver behaves more like other usbserial
23 * adapters. Issued new interval of 1ms instead of the default 10ms. As a
24 * result, transfer speed has been substantially increased. From avg. 850bps to
25 * avg. 3300bps. initial termios has also been modified. Cleaned up code and
26 * formatting issues so it is more readable. Replaced the C++ style comments.
27 *
28 * Lonnie Mendez <dignome@gmail.com>
29 * 12-15-2004
30 * Incorporated write buffering from pl2303 driver. Fixed bug with line
31 * handling so both lines are raised in cypress_open. (was dropping rts)
32 * Various code cleanups made as well along with other misc bug fixes.
33 *
34 * Lonnie Mendez <dignome@gmail.com>
35 * 04-10-2004
36 * Driver modified to support dynamic line settings. Various improvments
37 * and features.
38 *
39 * Neil Whelchel
40 * 10-2003
41 * Driver first released.
42 *
43 */
44
45 /* Thanks to Neil Whelchel for writing the first cypress m8 implementation for linux. */
46 /* Thanks to cypress for providing references for the hid reports. */
47 /* Thanks to Jiang Zhang for providing links and for general help. */
48 /* Code originates and was built up from ftdi_sio, belkin, pl2303 and others. */
49
50
51 #include <linux/kernel.h>
52 #include <linux/errno.h>
53 #include <linux/init.h>
54 #include <linux/slab.h>
55 #include <linux/tty.h>
56 #include <linux/tty_driver.h>
57 #include <linux/tty_flip.h>
58 #include <linux/module.h>
59 #include <linux/moduleparam.h>
60 #include <linux/spinlock.h>
61 #include <linux/usb.h>
62 #include <linux/usb/serial.h>
63 #include <linux/serial.h>
64 #include <linux/delay.h>
65 #include <asm/uaccess.h>
66
67 #include "cypress_m8.h"
68
69
70 #ifdef CONFIG_USB_SERIAL_DEBUG
71 static int debug = 1;
72 #else
73 static int debug;
74 #endif
75 static int stats;
76 static int interval;
77
78 /*
79 * Version Information
80 */
81 #define DRIVER_VERSION "v1.09"
82 #define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>"
83 #define DRIVER_DESC "Cypress USB to Serial Driver"
84
85 /* write buffer size defines */
86 #define CYPRESS_BUF_SIZE 1024
87 #define CYPRESS_CLOSING_WAIT (30*HZ)
88
89 static struct usb_device_id id_table_earthmate [] = {
90 { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) },
91 { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) },
92 { } /* Terminating entry */
93 };
94
95 static struct usb_device_id id_table_cyphidcomrs232 [] = {
96 { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) },
97 { } /* Terminating entry */
98 };
99
100 static struct usb_device_id id_table_nokiaca42v2 [] = {
101 { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) },
102 { } /* Terminating entry */
103 };
104
105 static struct usb_device_id id_table_combined [] = {
106 { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) },
107 { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) },
108 { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) },
109 { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) },
110 { } /* Terminating entry */
111 };
112
113 MODULE_DEVICE_TABLE (usb, id_table_combined);
114
115 static struct usb_driver cypress_driver = {
116 .name = "cypress",
117 .probe = usb_serial_probe,
118 .disconnect = usb_serial_disconnect,
119 .id_table = id_table_combined,
120 .no_dynamic_id = 1,
121 };
122
123 struct cypress_private {
124 spinlock_t lock; /* private lock */
125 int chiptype; /* identifier of device, for quirks/etc */
126 int bytes_in; /* used for statistics */
127 int bytes_out; /* used for statistics */
128 int cmd_count; /* used for statistics */
129 int cmd_ctrl; /* always set this to 1 before issuing a command */
130 struct cypress_buf *buf; /* write buffer */
131 int write_urb_in_use; /* write urb in use indicator */
132 int termios_initialized;
133 __u8 line_control; /* holds dtr / rts value */
134 __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */
135 __u8 current_config; /* stores the current configuration byte */
136 __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */
137 int baud_rate; /* stores current baud rate in integer form */
138 int cbr_mask; /* stores current baud rate in masked form */
139 int isthrottled; /* if throttled, discard reads */
140 wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */
141 char prev_status, diff_status; /* used for TIOCMIWAIT */
142 /* we pass a pointer to this as the arguement sent to cypress_set_termios old_termios */
143 struct termios tmp_termios; /* stores the old termios settings */
144 };
145
146 /* write buffer structure */
147 struct cypress_buf {
148 unsigned int buf_size;
149 char *buf_buf;
150 char *buf_get;
151 char *buf_put;
152 };
153
154 /* function prototypes for the Cypress USB to serial device */
155 static int cypress_earthmate_startup (struct usb_serial *serial);
156 static int cypress_hidcom_startup (struct usb_serial *serial);
157 static int cypress_ca42v2_startup (struct usb_serial *serial);
158 static void cypress_shutdown (struct usb_serial *serial);
159 static int cypress_open (struct usb_serial_port *port, struct file *filp);
160 static void cypress_close (struct usb_serial_port *port, struct file *filp);
161 static int cypress_write (struct usb_serial_port *port, const unsigned char *buf, int count);
162 static void cypress_send (struct usb_serial_port *port);
163 static int cypress_write_room (struct usb_serial_port *port);
164 static int cypress_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
165 static void cypress_set_termios (struct usb_serial_port *port, struct termios * old);
166 static int cypress_tiocmget (struct usb_serial_port *port, struct file *file);
167 static int cypress_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
168 static int cypress_chars_in_buffer (struct usb_serial_port *port);
169 static void cypress_throttle (struct usb_serial_port *port);
170 static void cypress_unthrottle (struct usb_serial_port *port);
171 static void cypress_read_int_callback (struct urb *urb, struct pt_regs *regs);
172 static void cypress_write_int_callback (struct urb *urb, struct pt_regs *regs);
173 /* baud helper functions */
174 static int mask_to_rate (unsigned mask);
175 static unsigned rate_to_mask (int rate);
176 /* write buffer functions */
177 static struct cypress_buf *cypress_buf_alloc(unsigned int size);
178 static void cypress_buf_free(struct cypress_buf *cb);
179 static void cypress_buf_clear(struct cypress_buf *cb);
180 static unsigned int cypress_buf_data_avail(struct cypress_buf *cb);
181 static unsigned int cypress_buf_space_avail(struct cypress_buf *cb);
182 static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, unsigned int count);
183 static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf, unsigned int count);
184
185
186 static struct usb_serial_driver cypress_earthmate_device = {
187 .driver = {
188 .owner = THIS_MODULE,
189 .name = "earthmate",
190 },
191 .description = "DeLorme Earthmate USB",
192 .id_table = id_table_earthmate,
193 .num_interrupt_in = 1,
194 .num_interrupt_out = 1,
195 .num_bulk_in = NUM_DONT_CARE,
196 .num_bulk_out = NUM_DONT_CARE,
197 .num_ports = 1,
198 .attach = cypress_earthmate_startup,
199 .shutdown = cypress_shutdown,
200 .open = cypress_open,
201 .close = cypress_close,
202 .write = cypress_write,
203 .write_room = cypress_write_room,
204 .ioctl = cypress_ioctl,
205 .set_termios = cypress_set_termios,
206 .tiocmget = cypress_tiocmget,
207 .tiocmset = cypress_tiocmset,
208 .chars_in_buffer = cypress_chars_in_buffer,
209 .throttle = cypress_throttle,
210 .unthrottle = cypress_unthrottle,
211 .read_int_callback = cypress_read_int_callback,
212 .write_int_callback = cypress_write_int_callback,
213 };
214
215 static struct usb_serial_driver cypress_hidcom_device = {
216 .driver = {
217 .owner = THIS_MODULE,
218 .name = "cyphidcom",
219 },
220 .description = "HID->COM RS232 Adapter",
221 .id_table = id_table_cyphidcomrs232,
222 .num_interrupt_in = 1,
223 .num_interrupt_out = 1,
224 .num_bulk_in = NUM_DONT_CARE,
225 .num_bulk_out = NUM_DONT_CARE,
226 .num_ports = 1,
227 .attach = cypress_hidcom_startup,
228 .shutdown = cypress_shutdown,
229 .open = cypress_open,
230 .close = cypress_close,
231 .write = cypress_write,
232 .write_room = cypress_write_room,
233 .ioctl = cypress_ioctl,
234 .set_termios = cypress_set_termios,
235 .tiocmget = cypress_tiocmget,
236 .tiocmset = cypress_tiocmset,
237 .chars_in_buffer = cypress_chars_in_buffer,
238 .throttle = cypress_throttle,
239 .unthrottle = cypress_unthrottle,
240 .read_int_callback = cypress_read_int_callback,
241 .write_int_callback = cypress_write_int_callback,
242 };
243
244 static struct usb_serial_driver cypress_ca42v2_device = {
245 .driver = {
246 .owner = THIS_MODULE,
247 .name = "nokiaca42v2",
248 },
249 .description = "Nokia CA-42 V2 Adapter",
250 .id_table = id_table_nokiaca42v2,
251 .num_interrupt_in = 1,
252 .num_interrupt_out = 1,
253 .num_bulk_in = NUM_DONT_CARE,
254 .num_bulk_out = NUM_DONT_CARE,
255 .num_ports = 1,
256 .attach = cypress_ca42v2_startup,
257 .shutdown = cypress_shutdown,
258 .open = cypress_open,
259 .close = cypress_close,
260 .write = cypress_write,
261 .write_room = cypress_write_room,
262 .ioctl = cypress_ioctl,
263 .set_termios = cypress_set_termios,
264 .tiocmget = cypress_tiocmget,
265 .tiocmset = cypress_tiocmset,
266 .chars_in_buffer = cypress_chars_in_buffer,
267 .throttle = cypress_throttle,
268 .unthrottle = cypress_unthrottle,
269 .read_int_callback = cypress_read_int_callback,
270 .write_int_callback = cypress_write_int_callback,
271 };
272
273 /*****************************************************************************
274 * Cypress serial helper functions
275 *****************************************************************************/
276
277
278 /* This function can either set or retrieve the current serial line settings */
279 static int cypress_serial_control (struct usb_serial_port *port, unsigned baud_mask, int data_bits, int stop_bits,
280 int parity_enable, int parity_type, int reset, int cypress_request_type)
281 {
282 int new_baudrate = 0, retval = 0, tries = 0;
283 struct cypress_private *priv;
284 __u8 feature_buffer[8];
285 unsigned long flags;
286
287 dbg("%s", __FUNCTION__);
288
289 priv = usb_get_serial_port_data(port);
290
291 switch(cypress_request_type) {
292 case CYPRESS_SET_CONFIG:
293
294 /*
295 * The general purpose firmware for the Cypress M8 allows for a maximum speed
296 * of 57600bps (I have no idea whether DeLorme chose to use the general purpose
297 * firmware or not), if you need to modify this speed setting for your own
298 * project please add your own chiptype and modify the code likewise. The
299 * Cypress HID->COM device will work successfully up to 115200bps (but the
300 * actual throughput is around 3kBps).
301 */
302 if (baud_mask != priv->cbr_mask) {
303 dbg("%s - baud rate is changing", __FUNCTION__);
304 if ( priv->chiptype == CT_EARTHMATE ) {
305 /* 300 and 600 baud rates are supported under the generic firmware,
306 * but are not used with NMEA and SiRF protocols */
307
308 if ( (baud_mask == B300) || (baud_mask == B600) ) {
309 err("%s - failed setting baud rate, unsupported speed",
310 __FUNCTION__);
311 new_baudrate = priv->baud_rate;
312 } else if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) {
313 err("%s - failed setting baud rate, unsupported speed",
314 __FUNCTION__);
315 new_baudrate = priv->baud_rate;
316 }
317 } else if (priv->chiptype == CT_CYPHIDCOM) {
318 if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) {
319 err("%s - failed setting baud rate, unsupported speed",
320 __FUNCTION__);
321 new_baudrate = priv->baud_rate;
322 }
323 } else if (priv->chiptype == CT_CA42V2) {
324 if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) {
325 err("%s - failed setting baud rate, unsupported speed",
326 __FUNCTION__);
327 new_baudrate = priv->baud_rate;
328 }
329 } else if (priv->chiptype == CT_GENERIC) {
330 if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) {
331 err("%s - failed setting baud rate, unsupported speed",
332 __FUNCTION__);
333 new_baudrate = priv->baud_rate;
334 }
335 } else {
336 info("%s - please define your chiptype", __FUNCTION__);
337 new_baudrate = priv->baud_rate;
338 }
339 } else { /* baud rate not changing, keep the old */
340 new_baudrate = priv->baud_rate;
341 }
342 dbg("%s - baud rate is being sent as %d", __FUNCTION__, new_baudrate);
343
344 memset(feature_buffer, 0, 8);
345 /* fill the feature_buffer with new configuration */
346 *((u_int32_t *)feature_buffer) = new_baudrate;
347
348 feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */
349 /* 1 bit gap */
350 feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */
351 feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */
352 feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */
353 /* 1 bit gap */
354 feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */
355
356 dbg("%s - device is being sent this feature report:", __FUNCTION__);
357 dbg("%s - %02X - %02X - %02X - %02X - %02X", __FUNCTION__, feature_buffer[0], feature_buffer[1],
358 feature_buffer[2], feature_buffer[3], feature_buffer[4]);
359
360 do {
361 retval = usb_control_msg (port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
362 HID_REQ_SET_REPORT, USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS,
363 0x0300, 0, feature_buffer, 8, 500);
364
365 if (tries++ >= 3)
366 break;
367
368 if (retval == EPIPE)
369 usb_clear_halt(port->serial->dev, 0x00);
370 } while (retval != 8 && retval != ENODEV);
371
372 if (retval != 8)
373 err("%s - failed sending serial line settings - %d", __FUNCTION__, retval);
374 else {
375 spin_lock_irqsave(&priv->lock, flags);
376 priv->baud_rate = new_baudrate;
377 priv->cbr_mask = baud_mask;
378 priv->current_config = feature_buffer[4];
379 spin_unlock_irqrestore(&priv->lock, flags);
380 }
381 break;
382 case CYPRESS_GET_CONFIG:
383 dbg("%s - retreiving serial line settings", __FUNCTION__);
384 /* set initial values in feature buffer */
385 memset(feature_buffer, 0, 8);
386
387 do {
388 retval = usb_control_msg (port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0),
389 HID_REQ_GET_REPORT, USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS,
390 0x0300, 0, feature_buffer, 8, 500);
391
392 if (tries++ >= 3)
393 break;
394
395 if (retval == EPIPE)
396 usb_clear_halt(port->serial->dev, 0x00);
397 } while (retval != 5 && retval != ENODEV);
398
399 if (retval != 5) {
400 err("%s - failed to retrieve serial line settings - %d", __FUNCTION__, retval);
401 return retval;
402 } else {
403 spin_lock_irqsave(&priv->lock, flags);
404
405 /* store the config in one byte, and later use bit masks to check values */
406 priv->current_config = feature_buffer[4];
407 priv->baud_rate = *((u_int32_t *)feature_buffer);
408
409 if ( (priv->cbr_mask = rate_to_mask(priv->baud_rate)) == 0x40)
410 dbg("%s - failed setting the baud mask (not defined)", __FUNCTION__);
411 spin_unlock_irqrestore(&priv->lock, flags);
412 }
413 }
414 spin_lock_irqsave(&priv->lock, flags);
415 ++priv->cmd_count;
416 spin_unlock_irqrestore(&priv->lock, flags);
417
418 return retval;
419 } /* cypress_serial_control */
420
421
422 /* given a baud mask, it will return integer baud on success */
423 static int mask_to_rate (unsigned mask)
424 {
425 int rate;
426
427 switch (mask) {
428 case B0: rate = 0; break;
429 case B300: rate = 300; break;
430 case B600: rate = 600; break;
431 case B1200: rate = 1200; break;
432 case B2400: rate = 2400; break;
433 case B4800: rate = 4800; break;
434 case B9600: rate = 9600; break;
435 case B19200: rate = 19200; break;
436 case B38400: rate = 38400; break;
437 case B57600: rate = 57600; break;
438 case B115200: rate = 115200; break;
439 default: rate = -1;
440 }
441
442 return rate;
443 }
444
445
446 static unsigned rate_to_mask (int rate)
447 {
448 unsigned mask;
449
450 switch (rate) {
451 case 0: mask = B0; break;
452 case 300: mask = B300; break;
453 case 600: mask = B600; break;
454 case 1200: mask = B1200; break;
455 case 2400: mask = B2400; break;
456 case 4800: mask = B4800; break;
457 case 9600: mask = B9600; break;
458 case 19200: mask = B19200; break;
459 case 38400: mask = B38400; break;
460 case 57600: mask = B57600; break;
461 case 115200: mask = B115200; break;
462 default: mask = 0x40;
463 }
464
465 return mask;
466 }
467 /*****************************************************************************
468 * Cypress serial driver functions
469 *****************************************************************************/
470
471
472 static int generic_startup (struct usb_serial *serial)
473 {
474 struct cypress_private *priv;
475
476 dbg("%s - port %d", __FUNCTION__, serial->port[0]->number);
477
478 priv = kzalloc(sizeof (struct cypress_private), GFP_KERNEL);
479 if (!priv)
480 return -ENOMEM;
481
482 spin_lock_init(&priv->lock);
483 priv->buf = cypress_buf_alloc(CYPRESS_BUF_SIZE);
484 if (priv->buf == NULL) {
485 kfree(priv);
486 return -ENOMEM;
487 }
488 init_waitqueue_head(&priv->delta_msr_wait);
489
490 usb_reset_configuration (serial->dev);
491
492 interval = 1;
493 priv->cmd_ctrl = 0;
494 priv->line_control = 0;
495 priv->termios_initialized = 0;
496 priv->rx_flags = 0;
497 priv->cbr_mask = B300;
498 usb_set_serial_port_data(serial->port[0], priv);
499
500 return 0;
501 }
502
503
504 static int cypress_earthmate_startup (struct usb_serial *serial)
505 {
506 struct cypress_private *priv;
507
508 dbg("%s", __FUNCTION__);
509
510 if (generic_startup(serial)) {
511 dbg("%s - Failed setting up port %d", __FUNCTION__,
512 serial->port[0]->number);
513 return 1;
514 }
515
516 priv = usb_get_serial_port_data(serial->port[0]);
517 priv->chiptype = CT_EARTHMATE;
518
519 return 0;
520 } /* cypress_earthmate_startup */
521
522
523 static int cypress_hidcom_startup (struct usb_serial *serial)
524 {
525 struct cypress_private *priv;
526
527 dbg("%s", __FUNCTION__);
528
529 if (generic_startup(serial)) {
530 dbg("%s - Failed setting up port %d", __FUNCTION__,
531 serial->port[0]->number);
532 return 1;
533 }
534
535 priv = usb_get_serial_port_data(serial->port[0]);
536 priv->chiptype = CT_CYPHIDCOM;
537
538 return 0;
539 } /* cypress_hidcom_startup */
540
541
542 static int cypress_ca42v2_startup (struct usb_serial *serial)
543 {
544 struct cypress_private *priv;
545
546 dbg("%s", __FUNCTION__);
547
548 if (generic_startup(serial)) {
549 dbg("%s - Failed setting up port %d", __FUNCTION__,
550 serial->port[0]->number);
551 return 1;
552 }
553
554 priv = usb_get_serial_port_data(serial->port[0]);
555 priv->chiptype = CT_CA42V2;
556
557 return 0;
558 } /* cypress_ca42v2_startup */
559
560
561 static void cypress_shutdown (struct usb_serial *serial)
562 {
563 struct cypress_private *priv;
564
565 dbg ("%s - port %d", __FUNCTION__, serial->port[0]->number);
566
567 /* all open ports are closed at this point */
568
569 priv = usb_get_serial_port_data(serial->port[0]);
570
571 if (priv) {
572 cypress_buf_free(priv->buf);
573 kfree(priv);
574 usb_set_serial_port_data(serial->port[0], NULL);
575 }
576 }
577
578
579 static int cypress_open (struct usb_serial_port *port, struct file *filp)
580 {
581 struct cypress_private *priv = usb_get_serial_port_data(port);
582 struct usb_serial *serial = port->serial;
583 unsigned long flags;
584 int result = 0;
585
586 dbg("%s - port %d", __FUNCTION__, port->number);
587
588 /* clear halts before open */
589 usb_clear_halt(serial->dev, 0x81);
590 usb_clear_halt(serial->dev, 0x02);
591
592 spin_lock_irqsave(&priv->lock, flags);
593 /* reset read/write statistics */
594 priv->bytes_in = 0;
595 priv->bytes_out = 0;
596 priv->cmd_count = 0;
597 priv->rx_flags = 0;
598 spin_unlock_irqrestore(&priv->lock, flags);
599
600 /* setting to zero could cause data loss */
601 port->tty->low_latency = 1;
602
603 /* raise both lines and set termios */
604 spin_lock_irqsave(&priv->lock, flags);
605 priv->line_control = CONTROL_DTR | CONTROL_RTS;
606 priv->cmd_ctrl = 1;
607 spin_unlock_irqrestore(&priv->lock, flags);
608 result = cypress_write(port, NULL, 0);
609
610 if (result) {
611 dev_err(&port->dev, "%s - failed setting the control lines - error %d\n", __FUNCTION__, result);
612 return result;
613 } else
614 dbg("%s - success setting the control lines", __FUNCTION__);
615
616 cypress_set_termios(port, &priv->tmp_termios);
617
618 /* setup the port and start reading from the device */
619 if(!port->interrupt_in_urb){
620 err("%s - interrupt_in_urb is empty!", __FUNCTION__);
621 return(-1);
622 }
623
624 usb_fill_int_urb(port->interrupt_in_urb, serial->dev,
625 usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress),
626 port->interrupt_in_urb->transfer_buffer, port->interrupt_in_urb->transfer_buffer_length,
627 cypress_read_int_callback, port, interval);
628 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
629
630 if (result){
631 dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
632 }
633
634 return result;
635 } /* cypress_open */
636
637
638 static void cypress_close(struct usb_serial_port *port, struct file * filp)
639 {
640 struct cypress_private *priv = usb_get_serial_port_data(port);
641 unsigned int c_cflag;
642 unsigned long flags;
643 int bps;
644 long timeout;
645 wait_queue_t wait;
646
647 dbg("%s - port %d", __FUNCTION__, port->number);
648
649 /* wait for data to drain from buffer */
650 spin_lock_irqsave(&priv->lock, flags);
651 timeout = CYPRESS_CLOSING_WAIT;
652 init_waitqueue_entry(&wait, current);
653 add_wait_queue(&port->tty->write_wait, &wait);
654 for (;;) {
655 set_current_state(TASK_INTERRUPTIBLE);
656 if (cypress_buf_data_avail(priv->buf) == 0
657 || timeout == 0 || signal_pending(current)
658 || !usb_get_intfdata(port->serial->interface))
659 break;
660 spin_unlock_irqrestore(&priv->lock, flags);
661 timeout = schedule_timeout(timeout);
662 spin_lock_irqsave(&priv->lock, flags);
663 }
664 set_current_state(TASK_RUNNING);
665 remove_wait_queue(&port->tty->write_wait, &wait);
666 /* clear out any remaining data in the buffer */
667 cypress_buf_clear(priv->buf);
668 spin_unlock_irqrestore(&priv->lock, flags);
669
670 /* wait for characters to drain from device */
671 bps = tty_get_baud_rate(port->tty);
672 if (bps > 1200)
673 timeout = max((HZ*2560)/bps,HZ/10);
674 else
675 timeout = 2*HZ;
676 schedule_timeout_interruptible(timeout);
677
678 dbg("%s - stopping urbs", __FUNCTION__);
679 usb_kill_urb (port->interrupt_in_urb);
680 usb_kill_urb (port->interrupt_out_urb);
681
682 if (port->tty) {
683 c_cflag = port->tty->termios->c_cflag;
684 if (c_cflag & HUPCL) {
685 /* drop dtr and rts */
686 priv = usb_get_serial_port_data(port);
687 spin_lock_irqsave(&priv->lock, flags);
688 priv->line_control = 0;
689 priv->cmd_ctrl = 1;
690 spin_unlock_irqrestore(&priv->lock, flags);
691 cypress_write(port, NULL, 0);
692 }
693 }
694
695 if (stats)
696 dev_info (&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n",
697 priv->bytes_in, priv->bytes_out, priv->cmd_count);
698 } /* cypress_close */
699
700
701 static int cypress_write(struct usb_serial_port *port, const unsigned char *buf, int count)
702 {
703 struct cypress_private *priv = usb_get_serial_port_data(port);
704 unsigned long flags;
705
706 dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
707
708 /* line control commands, which need to be executed immediately,
709 are not put into the buffer for obvious reasons.
710 */
711 if (priv->cmd_ctrl) {
712 count = 0;
713 goto finish;
714 }
715
716 if (!count)
717 return count;
718
719 spin_lock_irqsave(&priv->lock, flags);
720 count = cypress_buf_put(priv->buf, buf, count);
721 spin_unlock_irqrestore(&priv->lock, flags);
722
723 finish:
724 cypress_send(port);
725
726 return count;
727 } /* cypress_write */
728
729
730 static void cypress_send(struct usb_serial_port *port)
731 {
732 int count = 0, result, offset, actual_size;
733 struct cypress_private *priv = usb_get_serial_port_data(port);
734 unsigned long flags;
735
736 dbg("%s - port %d", __FUNCTION__, port->number);
737 dbg("%s - interrupt out size is %d", __FUNCTION__, port->interrupt_out_size);
738
739 spin_lock_irqsave(&priv->lock, flags);
740 if (priv->write_urb_in_use) {
741 dbg("%s - can't write, urb in use", __FUNCTION__);
742 spin_unlock_irqrestore(&priv->lock, flags);
743 return;
744 }
745 spin_unlock_irqrestore(&priv->lock, flags);
746
747 /* clear buffer */
748 memset(port->interrupt_out_urb->transfer_buffer, 0, port->interrupt_out_size);
749
750 spin_lock_irqsave(&priv->lock, flags);
751 switch (port->interrupt_out_size) {
752 case 32:
753 /* this is for the CY7C64013... */
754 offset = 2;
755 port->interrupt_out_buffer[0] = priv->line_control;
756 break;
757 case 8:
758 /* this is for the CY7C63743... */
759 offset = 1;
760 port->interrupt_out_buffer[0] = priv->line_control;
761 break;
762 default:
763 dbg("%s - wrong packet size", __FUNCTION__);
764 spin_unlock_irqrestore(&priv->lock, flags);
765 return;
766 }
767
768 if (priv->line_control & CONTROL_RESET)
769 priv->line_control &= ~CONTROL_RESET;
770
771 if (priv->cmd_ctrl) {
772 priv->cmd_count++;
773 dbg("%s - line control command being issued", __FUNCTION__);
774 spin_unlock_irqrestore(&priv->lock, flags);
775 goto send;
776 } else
777 spin_unlock_irqrestore(&priv->lock, flags);
778
779 count = cypress_buf_get(priv->buf, &port->interrupt_out_buffer[offset],
780 port->interrupt_out_size-offset);
781
782 if (count == 0) {
783 return;
784 }
785
786 switch (port->interrupt_out_size) {
787 case 32:
788 port->interrupt_out_buffer[1] = count;
789 break;
790 case 8:
791 port->interrupt_out_buffer[0] |= count;
792 }
793
794 dbg("%s - count is %d", __FUNCTION__, count);
795
796 send:
797 spin_lock_irqsave(&priv->lock, flags);
798 priv->write_urb_in_use = 1;
799 spin_unlock_irqrestore(&priv->lock, flags);
800
801 if (priv->cmd_ctrl)
802 actual_size = 1;
803 else
804 actual_size = count + (port->interrupt_out_size == 32 ? 2 : 1);
805
806 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, port->interrupt_out_size,
807 port->interrupt_out_urb->transfer_buffer);
808
809 port->interrupt_out_urb->transfer_buffer_length = actual_size;
810 port->interrupt_out_urb->dev = port->serial->dev;
811 port->interrupt_out_urb->interval = interval;
812 result = usb_submit_urb (port->interrupt_out_urb, GFP_ATOMIC);
813 if (result) {
814 dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__,
815 result);
816 priv->write_urb_in_use = 0;
817 }
818
819 spin_lock_irqsave(&priv->lock, flags);
820 if (priv->cmd_ctrl) {
821 priv->cmd_ctrl = 0;
822 }
823 priv->bytes_out += count; /* do not count the line control and size bytes */
824 spin_unlock_irqrestore(&priv->lock, flags);
825
826 usb_serial_port_softint(port);
827 } /* cypress_send */
828
829
830 /* returns how much space is available in the soft buffer */
831 static int cypress_write_room(struct usb_serial_port *port)
832 {
833 struct cypress_private *priv = usb_get_serial_port_data(port);
834 int room = 0;
835 unsigned long flags;
836
837 dbg("%s - port %d", __FUNCTION__, port->number);
838
839 spin_lock_irqsave(&priv->lock, flags);
840 room = cypress_buf_space_avail(priv->buf);
841 spin_unlock_irqrestore(&priv->lock, flags);
842
843 dbg("%s - returns %d", __FUNCTION__, room);
844 return room;
845 }
846
847
848 static int cypress_tiocmget (struct usb_serial_port *port, struct file *file)
849 {
850 struct cypress_private *priv = usb_get_serial_port_data(port);
851 __u8 status, control;
852 unsigned int result = 0;
853 unsigned long flags;
854
855 dbg("%s - port %d", __FUNCTION__, port->number);
856
857 spin_lock_irqsave(&priv->lock, flags);
858 control = priv->line_control;
859 status = priv->current_status;
860 spin_unlock_irqrestore(&priv->lock, flags);
861
862 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
863 | ((control & CONTROL_RTS) ? TIOCM_RTS : 0)
864 | ((status & UART_CTS) ? TIOCM_CTS : 0)
865 | ((status & UART_DSR) ? TIOCM_DSR : 0)
866 | ((status & UART_RI) ? TIOCM_RI : 0)
867 | ((status & UART_CD) ? TIOCM_CD : 0);
868
869 dbg("%s - result = %x", __FUNCTION__, result);
870
871 return result;
872 }
873
874
875 static int cypress_tiocmset (struct usb_serial_port *port, struct file *file,
876 unsigned int set, unsigned int clear)
877 {
878 struct cypress_private *priv = usb_get_serial_port_data(port);
879 unsigned long flags;
880
881 dbg("%s - port %d", __FUNCTION__, port->number);
882
883 spin_lock_irqsave(&priv->lock, flags);
884 if (set & TIOCM_RTS)
885 priv->line_control |= CONTROL_RTS;
886 if (set & TIOCM_DTR)
887 priv->line_control |= CONTROL_DTR;
888 if (clear & TIOCM_RTS)
889 priv->line_control &= ~CONTROL_RTS;
890 if (clear & TIOCM_DTR)
891 priv->line_control &= ~CONTROL_DTR;
892 spin_unlock_irqrestore(&priv->lock, flags);
893
894 priv->cmd_ctrl = 1;
895 return cypress_write(port, NULL, 0);
896 }
897
898
899 static int cypress_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
900 {
901 struct cypress_private *priv = usb_get_serial_port_data(port);
902
903 dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
904
905 switch (cmd) {
906 case TIOCGSERIAL:
907 if (copy_to_user((void __user *)arg, port->tty->termios, sizeof(struct termios))) {
908 return -EFAULT;
909 }
910 return (0);
911 break;
912 case TIOCSSERIAL:
913 if (copy_from_user(port->tty->termios, (void __user *)arg, sizeof(struct termios))) {
914 return -EFAULT;
915 }
916 /* here we need to call cypress_set_termios to invoke the new settings */
917 cypress_set_termios(port, &priv->tmp_termios);
918 return (0);
919 break;
920 /* these are called when setting baud rate from gpsd */
921 case TCGETS:
922 if (copy_to_user((void __user *)arg, port->tty->termios, sizeof(struct termios))) {
923 return -EFAULT;
924 }
925 return (0);
926 break;
927 case TCSETS:
928 if (copy_from_user(port->tty->termios, (void __user *)arg, sizeof(struct termios))) {
929 return -EFAULT;
930 }
931 /* here we need to call cypress_set_termios to invoke the new settings */
932 cypress_set_termios(port, &priv->tmp_termios);
933 return (0);
934 break;
935 /* This code comes from drivers/char/serial.c and ftdi_sio.c */
936 case TIOCMIWAIT:
937 while (priv != NULL) {
938 interruptible_sleep_on(&priv->delta_msr_wait);
939 /* see if a signal did it */
940 if (signal_pending(current))
941 return -ERESTARTSYS;
942 else {
943 char diff = priv->diff_status;
944
945 if (diff == 0) {
946 return -EIO; /* no change => error */
947 }
948
949 /* consume all events */
950 priv->diff_status = 0;
951
952 /* return 0 if caller wanted to know about these bits */
953 if ( ((arg & TIOCM_RNG) && (diff & UART_RI)) ||
954 ((arg & TIOCM_DSR) && (diff & UART_DSR)) ||
955 ((arg & TIOCM_CD) && (diff & UART_CD)) ||
956 ((arg & TIOCM_CTS) && (diff & UART_CTS)) ) {
957 return 0;
958 }
959 /* otherwise caller can't care less about what happened,
960 * and so we continue to wait for more events.
961 */
962 }
963 }
964 return 0;
965 break;
966 default:
967 break;
968 }
969
970 dbg("%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h", __FUNCTION__, cmd);
971
972 return -ENOIOCTLCMD;
973 } /* cypress_ioctl */
974
975
976 static void cypress_set_termios (struct usb_serial_port *port,
977 struct termios *old_termios)
978 {
979 struct cypress_private *priv = usb_get_serial_port_data(port);
980 struct tty_struct *tty;
981 int data_bits, stop_bits, parity_type, parity_enable;
982 unsigned cflag, iflag, baud_mask;
983 unsigned long flags;
984 __u8 oldlines;
985 int linechange = 0;
986
987 dbg("%s - port %d", __FUNCTION__, port->number);
988
989 tty = port->tty;
990 if ((!tty) || (!tty->termios)) {
991 dbg("%s - no tty structures", __FUNCTION__);
992 return;
993 }
994
995 spin_lock_irqsave(&priv->lock, flags);
996 if (!priv->termios_initialized) {
997 if (priv->chiptype == CT_EARTHMATE) {
998 *(tty->termios) = tty_std_termios;
999 tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL |
1000 CLOCAL;
1001 } else if (priv->chiptype == CT_CYPHIDCOM) {
1002 *(tty->termios) = tty_std_termios;
1003 tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL |
1004 CLOCAL;
1005 } else if (priv->chiptype == CT_CA42V2) {
1006 *(tty->termios) = tty_std_termios;
1007 tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL |
1008 CLOCAL;
1009 }
1010 priv->termios_initialized = 1;
1011 }
1012 spin_unlock_irqrestore(&priv->lock, flags);
1013
1014 cflag = tty->termios->c_cflag;
1015 iflag = tty->termios->c_iflag;
1016
1017 /* check if there are new settings */
1018 if (old_termios) {
1019 if ((cflag != old_termios->c_cflag) ||
1020 (RELEVANT_IFLAG(iflag) !=
1021 RELEVANT_IFLAG(old_termios->c_iflag))) {
1022 dbg("%s - attempting to set new termios settings",
1023 __FUNCTION__);
1024 /* should make a copy of this in case something goes
1025 * wrong in the function, we can restore it */
1026 spin_lock_irqsave(&priv->lock, flags);
1027 priv->tmp_termios = *(tty->termios);
1028 spin_unlock_irqrestore(&priv->lock, flags);
1029 } else {
1030 dbg("%s - nothing to do, exiting", __FUNCTION__);
1031 return;
1032 }
1033 } else
1034 return;
1035
1036 /* set number of data bits, parity, stop bits */
1037 /* when parity is disabled the parity type bit is ignored */
1038
1039 /* 1 means 2 stop bits, 0 means 1 stop bit */
1040 stop_bits = cflag & CSTOPB ? 1 : 0;
1041
1042 if (cflag & PARENB) {
1043 parity_enable = 1;
1044 /* 1 means odd parity, 0 means even parity */
1045 parity_type = cflag & PARODD ? 1 : 0;
1046 } else
1047 parity_enable = parity_type = 0;
1048
1049 if (cflag & CSIZE) {
1050 switch (cflag & CSIZE) {
1051 case CS5:
1052 data_bits = 0;
1053 break;
1054 case CS6:
1055 data_bits = 1;
1056 break;
1057 case CS7:
1058 data_bits = 2;
1059 break;
1060 case CS8:
1061 data_bits = 3;
1062 break;
1063 default:
1064 err("%s - CSIZE was set, but not CS5-CS8",
1065 __FUNCTION__);
1066 data_bits = 3;
1067 }
1068 } else
1069 data_bits = 3;
1070
1071 spin_lock_irqsave(&priv->lock, flags);
1072 oldlines = priv->line_control;
1073 if ((cflag & CBAUD) == B0) {
1074 /* drop dtr and rts */
1075 dbg("%s - dropping the lines, baud rate 0bps", __FUNCTION__);
1076 baud_mask = B0;
1077 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
1078 } else {
1079 baud_mask = (cflag & CBAUD);
1080 switch(baud_mask) {
1081 case B300:
1082 dbg("%s - setting baud 300bps", __FUNCTION__);
1083 break;
1084 case B600:
1085 dbg("%s - setting baud 600bps", __FUNCTION__);
1086 break;
1087 case B1200:
1088 dbg("%s - setting baud 1200bps", __FUNCTION__);
1089 break;
1090 case B2400:
1091 dbg("%s - setting baud 2400bps", __FUNCTION__);
1092 break;
1093 case B4800:
1094 dbg("%s - setting baud 4800bps", __FUNCTION__);
1095 break;
1096 case B9600:
1097 dbg("%s - setting baud 9600bps", __FUNCTION__);
1098 break;
1099 case B19200:
1100 dbg("%s - setting baud 19200bps", __FUNCTION__);
1101 break;
1102 case B38400:
1103 dbg("%s - setting baud 38400bps", __FUNCTION__);
1104 break;
1105 case B57600:
1106 dbg("%s - setting baud 57600bps", __FUNCTION__);
1107 break;
1108 case B115200:
1109 dbg("%s - setting baud 115200bps", __FUNCTION__);
1110 break;
1111 default:
1112 dbg("%s - unknown masked baud rate", __FUNCTION__);
1113 }
1114 priv->line_control = (CONTROL_DTR | CONTROL_RTS);
1115 }
1116 spin_unlock_irqrestore(&priv->lock, flags);
1117
1118 dbg("%s - sending %d stop_bits, %d parity_enable, %d parity_type, "
1119 "%d data_bits (+5)", __FUNCTION__, stop_bits,
1120 parity_enable, parity_type, data_bits);
1121
1122 cypress_serial_control(port, baud_mask, data_bits, stop_bits,
1123 parity_enable, parity_type, 0, CYPRESS_SET_CONFIG);
1124
1125 /* we perform a CYPRESS_GET_CONFIG so that the current settings are
1126 * filled into the private structure this should confirm that all is
1127 * working if it returns what we just set */
1128 cypress_serial_control(port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG);
1129
1130 /* Here we can define custom tty settings for devices; the main tty
1131 * termios flag base comes from empeg.c */
1132
1133 spin_lock_irqsave(&priv->lock, flags);
1134 if ( (priv->chiptype == CT_EARTHMATE) && (priv->baud_rate == 4800) ) {
1135 dbg("Using custom termios settings for a baud rate of "
1136 "4800bps.");
1137 /* define custom termios settings for NMEA protocol */
1138
1139 tty->termios->c_iflag /* input modes - */
1140 &= ~(IGNBRK /* disable ignore break */
1141 | BRKINT /* disable break causes interrupt */
1142 | PARMRK /* disable mark parity errors */
1143 | ISTRIP /* disable clear high bit of input char */
1144 | INLCR /* disable translate NL to CR */
1145 | IGNCR /* disable ignore CR */
1146 | ICRNL /* disable translate CR to NL */
1147 | IXON); /* disable enable XON/XOFF flow control */
1148
1149 tty->termios->c_oflag /* output modes */
1150 &= ~OPOST; /* disable postprocess output char */
1151
1152 tty->termios->c_lflag /* line discipline modes */
1153 &= ~(ECHO /* disable echo input characters */
1154 | ECHONL /* disable echo new line */
1155 | ICANON /* disable erase, kill, werase, and rprnt
1156 special characters */
1157 | ISIG /* disable interrupt, quit, and suspend
1158 special characters */
1159 | IEXTEN); /* disable non-POSIX special characters */
1160 } /* CT_CYPHIDCOM: Application should handle this for device */
1161
1162 linechange = (priv->line_control != oldlines);
1163 spin_unlock_irqrestore(&priv->lock, flags);
1164
1165 /* if necessary, set lines */
1166 if (linechange) {
1167 priv->cmd_ctrl = 1;
1168 cypress_write(port, NULL, 0);
1169 }
1170 } /* cypress_set_termios */
1171
1172
1173 /* returns amount of data still left in soft buffer */
1174 static int cypress_chars_in_buffer(struct usb_serial_port *port)
1175 {
1176 struct cypress_private *priv = usb_get_serial_port_data(port);
1177 int chars = 0;
1178 unsigned long flags;
1179
1180 dbg("%s - port %d", __FUNCTION__, port->number);
1181
1182 spin_lock_irqsave(&priv->lock, flags);
1183 chars = cypress_buf_data_avail(priv->buf);
1184 spin_unlock_irqrestore(&priv->lock, flags);
1185
1186 dbg("%s - returns %d", __FUNCTION__, chars);
1187 return chars;
1188 }
1189
1190
1191 static void cypress_throttle (struct usb_serial_port *port)
1192 {
1193 struct cypress_private *priv = usb_get_serial_port_data(port);
1194 unsigned long flags;
1195
1196 dbg("%s - port %d", __FUNCTION__, port->number);
1197
1198 spin_lock_irqsave(&priv->lock, flags);
1199 priv->rx_flags = THROTTLED;
1200 spin_unlock_irqrestore(&priv->lock, flags);
1201 }
1202
1203
1204 static void cypress_unthrottle (struct usb_serial_port *port)
1205 {
1206 struct cypress_private *priv = usb_get_serial_port_data(port);
1207 int actually_throttled, result;
1208 unsigned long flags;
1209
1210 dbg("%s - port %d", __FUNCTION__, port->number);
1211
1212 spin_lock_irqsave(&priv->lock, flags);
1213 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED;
1214 priv->rx_flags = 0;
1215 spin_unlock_irqrestore(&priv->lock, flags);
1216
1217 if (actually_throttled) {
1218 port->interrupt_in_urb->dev = port->serial->dev;
1219
1220 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
1221 if (result)
1222 dev_err(&port->dev, "%s - failed submitting read urb, "
1223 "error %d\n", __FUNCTION__, result);
1224 }
1225 }
1226
1227
1228 static void cypress_read_int_callback(struct urb *urb, struct pt_regs *regs)
1229 {
1230 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1231 struct cypress_private *priv = usb_get_serial_port_data(port);
1232 struct tty_struct *tty;
1233 unsigned char *data = urb->transfer_buffer;
1234 unsigned long flags;
1235 char tty_flag = TTY_NORMAL;
1236 int havedata = 0;
1237 int bytes = 0;
1238 int result;
1239 int i = 0;
1240
1241 dbg("%s - port %d", __FUNCTION__, port->number);
1242
1243 if (urb->status) {
1244 dbg("%s - nonzero read status received: %d", __FUNCTION__,
1245 urb->status);
1246 return;
1247 }
1248
1249 spin_lock_irqsave(&priv->lock, flags);
1250 if (priv->rx_flags & THROTTLED) {
1251 dbg("%s - now throttling", __FUNCTION__);
1252 priv->rx_flags |= ACTUALLY_THROTTLED;
1253 spin_unlock_irqrestore(&priv->lock, flags);
1254 return;
1255 }
1256 spin_unlock_irqrestore(&priv->lock, flags);
1257
1258 tty = port->tty;
1259 if (!tty) {
1260 dbg("%s - bad tty pointer - exiting", __FUNCTION__);
1261 return;
1262 }
1263
1264 spin_lock_irqsave(&priv->lock, flags);
1265 switch(urb->actual_length) {
1266 case 32:
1267 /* This is for the CY7C64013... */
1268 priv->current_status = data[0] & 0xF8;
1269 bytes = data[1] + 2;
1270 i = 2;
1271 if (bytes > 2)
1272 havedata = 1;
1273 break;
1274 case 8:
1275 /* This is for the CY7C63743... */
1276 priv->current_status = data[0] & 0xF8;
1277 bytes = (data[0] & 0x07) + 1;
1278 i = 1;
1279 if (bytes > 1)
1280 havedata = 1;
1281 break;
1282 default:
1283 dbg("%s - wrong packet size - received %d bytes",
1284 __FUNCTION__, urb->actual_length);
1285 spin_unlock_irqrestore(&priv->lock, flags);
1286 goto continue_read;
1287 }
1288 spin_unlock_irqrestore(&priv->lock, flags);
1289
1290 usb_serial_debug_data (debug, &port->dev, __FUNCTION__,
1291 urb->actual_length, data);
1292
1293 spin_lock_irqsave(&priv->lock, flags);
1294 /* check to see if status has changed */
1295 if (priv != NULL) {
1296 if (priv->current_status != priv->prev_status) {
1297 priv->diff_status |= priv->current_status ^
1298 priv->prev_status;
1299 wake_up_interruptible(&priv->delta_msr_wait);
1300 priv->prev_status = priv->current_status;
1301 }
1302 }
1303 spin_unlock_irqrestore(&priv->lock, flags);
1304
1305 /* hangup, as defined in acm.c... this might be a bad place for it
1306 * though */
1307 if (tty && !(tty->termios->c_cflag & CLOCAL) &&
1308 !(priv->current_status & UART_CD)) {
1309 dbg("%s - calling hangup", __FUNCTION__);
1310 tty_hangup(tty);
1311 goto continue_read;
1312 }
1313
1314 /* There is one error bit... I'm assuming it is a parity error
1315 * indicator as the generic firmware will set this bit to 1 if a
1316 * parity error occurs.
1317 * I can not find reference to any other error events. */
1318 spin_lock_irqsave(&priv->lock, flags);
1319 if (priv->current_status & CYP_ERROR) {
1320 spin_unlock_irqrestore(&priv->lock, flags);
1321 tty_flag = TTY_PARITY;
1322 dbg("%s - Parity Error detected", __FUNCTION__);
1323 } else
1324 spin_unlock_irqrestore(&priv->lock, flags);
1325
1326 /* process read if there is data other than line status */
1327 if (tty && (bytes > i)) {
1328 bytes = tty_buffer_request_room(tty, bytes);
1329 for (; i < bytes ; ++i) {
1330 dbg("pushing byte number %d - %d - %c", i, data[i],
1331 data[i]);
1332 tty_insert_flip_char(tty, data[i], tty_flag);
1333 }
1334 tty_flip_buffer_push(port->tty);
1335 }
1336
1337 spin_lock_irqsave(&priv->lock, flags);
1338 /* control and status byte(s) are also counted */
1339 priv->bytes_in += bytes;
1340 spin_unlock_irqrestore(&priv->lock, flags);
1341
1342 continue_read:
1343
1344 /* Continue trying to always read... unless the port has closed. */
1345
1346 if (port->open_count > 0) {
1347 usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev,
1348 usb_rcvintpipe(port->serial->dev,
1349 port->interrupt_in_endpointAddress),
1350 port->interrupt_in_urb->transfer_buffer,
1351 port->interrupt_in_urb->transfer_buffer_length,
1352 cypress_read_int_callback, port, interval);
1353 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
1354 if (result)
1355 dev_err(&urb->dev->dev, "%s - failed resubmitting "
1356 "read urb, error %d\n", __FUNCTION__,
1357 result);
1358 }
1359
1360 return;
1361 } /* cypress_read_int_callback */
1362
1363
1364 static void cypress_write_int_callback(struct urb *urb, struct pt_regs *regs)
1365 {
1366 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1367 struct cypress_private *priv = usb_get_serial_port_data(port);
1368 int result;
1369
1370 dbg("%s - port %d", __FUNCTION__, port->number);
1371
1372 switch (urb->status) {
1373 case 0:
1374 /* success */
1375 break;
1376 case -ECONNRESET:
1377 case -ENOENT:
1378 case -ESHUTDOWN:
1379 /* this urb is terminated, clean up */
1380 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
1381 priv->write_urb_in_use = 0;
1382 return;
1383 case -EPIPE: /* no break needed */
1384 usb_clear_halt(port->serial->dev, 0x02);
1385 default:
1386 /* error in the urb, so we have to resubmit it */
1387 dbg("%s - Overflow in write", __FUNCTION__);
1388 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
1389 port->interrupt_out_urb->transfer_buffer_length = 1;
1390 port->interrupt_out_urb->dev = port->serial->dev;
1391 result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC);
1392 if (result)
1393 dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n",
1394 __FUNCTION__, result);
1395 else
1396 return;
1397 }
1398
1399 priv->write_urb_in_use = 0;
1400
1401 /* send any buffered data */
1402 cypress_send(port);
1403 }
1404
1405
1406 /*****************************************************************************
1407 * Write buffer functions - buffering code from pl2303 used
1408 *****************************************************************************/
1409
1410 /*
1411 * cypress_buf_alloc
1412 *
1413 * Allocate a circular buffer and all associated memory.
1414 */
1415
1416 static struct cypress_buf *cypress_buf_alloc(unsigned int size)
1417 {
1418
1419 struct cypress_buf *cb;
1420
1421
1422 if (size == 0)
1423 return NULL;
1424
1425 cb = (struct cypress_buf *)kmalloc(sizeof(struct cypress_buf), GFP_KERNEL);
1426 if (cb == NULL)
1427 return NULL;
1428
1429 cb->buf_buf = kmalloc(size, GFP_KERNEL);
1430 if (cb->buf_buf == NULL) {
1431 kfree(cb);
1432 return NULL;
1433 }
1434
1435 cb->buf_size = size;
1436 cb->buf_get = cb->buf_put = cb->buf_buf;
1437
1438 return cb;
1439
1440 }
1441
1442
1443 /*
1444 * cypress_buf_free
1445 *
1446 * Free the buffer and all associated memory.
1447 */
1448
1449 static void cypress_buf_free(struct cypress_buf *cb)
1450 {
1451 if (cb) {
1452 kfree(cb->buf_buf);
1453 kfree(cb);
1454 }
1455 }
1456
1457
1458 /*
1459 * cypress_buf_clear
1460 *
1461 * Clear out all data in the circular buffer.
1462 */
1463
1464 static void cypress_buf_clear(struct cypress_buf *cb)
1465 {
1466 if (cb != NULL)
1467 cb->buf_get = cb->buf_put;
1468 /* equivalent to a get of all data available */
1469 }
1470
1471
1472 /*
1473 * cypress_buf_data_avail
1474 *
1475 * Return the number of bytes of data available in the circular
1476 * buffer.
1477 */
1478
1479 static unsigned int cypress_buf_data_avail(struct cypress_buf *cb)
1480 {
1481 if (cb != NULL)
1482 return ((cb->buf_size + cb->buf_put - cb->buf_get) % cb->buf_size);
1483 else
1484 return 0;
1485 }
1486
1487
1488 /*
1489 * cypress_buf_space_avail
1490 *
1491 * Return the number of bytes of space available in the circular
1492 * buffer.
1493 */
1494
1495 static unsigned int cypress_buf_space_avail(struct cypress_buf *cb)
1496 {
1497 if (cb != NULL)
1498 return ((cb->buf_size + cb->buf_get - cb->buf_put - 1) % cb->buf_size);
1499 else
1500 return 0;
1501 }
1502
1503
1504 /*
1505 * cypress_buf_put
1506 *
1507 * Copy data data from a user buffer and put it into the circular buffer.
1508 * Restrict to the amount of space available.
1509 *
1510 * Return the number of bytes copied.
1511 */
1512
1513 static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf,
1514 unsigned int count)
1515 {
1516
1517 unsigned int len;
1518
1519
1520 if (cb == NULL)
1521 return 0;
1522
1523 len = cypress_buf_space_avail(cb);
1524 if (count > len)
1525 count = len;
1526
1527 if (count == 0)
1528 return 0;
1529
1530 len = cb->buf_buf + cb->buf_size - cb->buf_put;
1531 if (count > len) {
1532 memcpy(cb->buf_put, buf, len);
1533 memcpy(cb->buf_buf, buf+len, count - len);
1534 cb->buf_put = cb->buf_buf + count - len;
1535 } else {
1536 memcpy(cb->buf_put, buf, count);
1537 if (count < len)
1538 cb->buf_put += count;
1539 else /* count == len */
1540 cb->buf_put = cb->buf_buf;
1541 }
1542
1543 return count;
1544
1545 }
1546
1547
1548 /*
1549 * cypress_buf_get
1550 *
1551 * Get data from the circular buffer and copy to the given buffer.
1552 * Restrict to the amount of data available.
1553 *
1554 * Return the number of bytes copied.
1555 */
1556
1557 static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf,
1558 unsigned int count)
1559 {
1560
1561 unsigned int len;
1562
1563
1564 if (cb == NULL)
1565 return 0;
1566
1567 len = cypress_buf_data_avail(cb);
1568 if (count > len)
1569 count = len;
1570
1571 if (count == 0)
1572 return 0;
1573
1574 len = cb->buf_buf + cb->buf_size - cb->buf_get;
1575 if (count > len) {
1576 memcpy(buf, cb->buf_get, len);
1577 memcpy(buf+len, cb->buf_buf, count - len);
1578 cb->buf_get = cb->buf_buf + count - len;
1579 } else {
1580 memcpy(buf, cb->buf_get, count);
1581 if (count < len)
1582 cb->buf_get += count;
1583 else /* count == len */
1584 cb->buf_get = cb->buf_buf;
1585 }
1586
1587 return count;
1588
1589 }
1590
1591 /*****************************************************************************
1592 * Module functions
1593 *****************************************************************************/
1594
1595 static int __init cypress_init(void)
1596 {
1597 int retval;
1598
1599 dbg("%s", __FUNCTION__);
1600
1601 retval = usb_serial_register(&cypress_earthmate_device);
1602 if (retval)
1603 goto failed_em_register;
1604 retval = usb_serial_register(&cypress_hidcom_device);
1605 if (retval)
1606 goto failed_hidcom_register;
1607 retval = usb_serial_register(&cypress_ca42v2_device);
1608 if (retval)
1609 goto failed_ca42v2_register;
1610 retval = usb_register(&cypress_driver);
1611 if (retval)
1612 goto failed_usb_register;
1613
1614 info(DRIVER_DESC " " DRIVER_VERSION);
1615 return 0;
1616 failed_usb_register:
1617 usb_deregister(&cypress_driver);
1618 failed_ca42v2_register:
1619 usb_serial_deregister(&cypress_ca42v2_device);
1620 failed_hidcom_register:
1621 usb_serial_deregister(&cypress_hidcom_device);
1622 failed_em_register:
1623 usb_serial_deregister(&cypress_earthmate_device);
1624
1625 return retval;
1626 }
1627
1628
1629 static void __exit cypress_exit (void)
1630 {
1631 dbg("%s", __FUNCTION__);
1632
1633 usb_deregister (&cypress_driver);
1634 usb_serial_deregister (&cypress_earthmate_device);
1635 usb_serial_deregister (&cypress_hidcom_device);
1636 usb_serial_deregister (&cypress_ca42v2_device);
1637 }
1638
1639
1640 module_init(cypress_init);
1641 module_exit(cypress_exit);
1642
1643 MODULE_AUTHOR( DRIVER_AUTHOR );
1644 MODULE_DESCRIPTION( DRIVER_DESC );
1645 MODULE_VERSION( DRIVER_VERSION );
1646 MODULE_LICENSE("GPL");
1647
1648 module_param(debug, bool, S_IRUGO | S_IWUSR);
1649 MODULE_PARM_DESC(debug, "Debug enabled or not");
1650 module_param(stats, bool, S_IRUGO | S_IWUSR);
1651 MODULE_PARM_DESC(stats, "Enable statistics or not");
1652 module_param(interval, int, S_IRUGO | S_IWUSR);
1653 MODULE_PARM_DESC(interval, "Overrides interrupt interval");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree