projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[deliverable/linux.git] / drivers / usb / serial / kl5kusb105.c
1 /*
2 * KLSI KL5KUSB105 chip RS232 converter driver
3 *
4 * Copyright (C) 2001 Utz-Uwe Haus <haus@uuhaus.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * All information about the device was acquired using SniffUSB ans snoopUSB
12 * on Windows98.
13 * It was written out of frustration with the PalmConnect USB Serial adapter
14 * sold by Palm Inc.
15 * Neither Palm, nor their contractor (MCCI) or their supplier (KLSI) provided
16 * information that was not already available.
17 *
18 * It seems that KLSI bought some silicon-design information from ScanLogic,
19 * whose SL11R processor is at the core of the KL5KUSB chipset from KLSI.
20 * KLSI has firmware available for their devices; it is probable that the
21 * firmware differs from that used by KLSI in their products. If you have an
22 * original KLSI device and can provide some information on it, I would be
23 * most interested in adding support for it here. If you have any information
24 * on the protocol used (or find errors in my reverse-engineered stuff), please
25 * let me know.
26 *
27 * The code was only tested with a PalmConnect USB adapter; if you
28 * are adventurous, try it with any KLSI-based device and let me know how it
29 * breaks so that I can fix it!
30 */
31
32 /* TODO:
33 * check modem line signals
34 * implement handshaking or decide that we do not support it
35 */
36
37 /* History:
38 * 0.3a - implemented pools of write URBs
39 * 0.3 - alpha version for public testing
40 * 0.2 - TIOCMGET works, so autopilot(1) can be used!
41 * 0.1 - can be used to to pilot-xfer -p /dev/ttyUSB0 -l
42 *
43 * The driver skeleton is mainly based on mct_u232.c and various other
44 * pieces of code shamelessly copied from the drivers/usb/serial/ directory.
45 */
46
47
48 #include <linux/kernel.h>
49 #include <linux/errno.h>
50 #include <linux/init.h>
51 #include <linux/slab.h>
52 #include <linux/tty.h>
53 #include <linux/tty_driver.h>
54 #include <linux/tty_flip.h>
55 #include <linux/module.h>
56 #include <linux/uaccess.h>
57 #include <asm/unaligned.h>
58 #include <linux/usb.h>
59 #include <linux/usb/serial.h>
60 #include "kl5kusb105.h"
61
62 static int debug;
63
64 /*
65 * Version Information
66 */
67 #define DRIVER_VERSION "v0.3a"
68 #define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>"
69 #define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver"
70
71
72 /*
73 * Function prototypes
74 */
75 static int klsi_105_startup(struct usb_serial *serial);
76 static void klsi_105_shutdown(struct usb_serial *serial);
77 static int klsi_105_open(struct tty_struct *tty,
78 struct usb_serial_port *port, struct file *filp);
79 static void klsi_105_close(struct tty_struct *tty,
80 struct usb_serial_port *port, struct file *filp);
81 static int klsi_105_write(struct tty_struct *tty,
82 struct usb_serial_port *port, const unsigned char *buf, int count);
83 static void klsi_105_write_bulk_callback(struct urb *urb);
84 static int klsi_105_chars_in_buffer(struct tty_struct *tty);
85 static int klsi_105_write_room(struct tty_struct *tty);
86 static void klsi_105_read_bulk_callback(struct urb *urb);
87 static void klsi_105_set_termios(struct tty_struct *tty,
88 struct usb_serial_port *port, struct ktermios *old);
89 static void klsi_105_throttle(struct tty_struct *tty);
90 static void klsi_105_unthrottle(struct tty_struct *tty);
91 static int klsi_105_tiocmget(struct tty_struct *tty, struct file *file);
92 static int klsi_105_tiocmset(struct tty_struct *tty, struct file *file,
93 unsigned int set, unsigned int clear);
94
95 /*
96 * All of the device info needed for the KLSI converters.
97 */
98 static struct usb_device_id id_table [] = {
99 { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) },
100 { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) },
101 { } /* Terminating entry */
102 };
103
104 MODULE_DEVICE_TABLE(usb, id_table);
105
106 static struct usb_driver kl5kusb105d_driver = {
107 .name = "kl5kusb105d",
108 .probe = usb_serial_probe,
109 .disconnect = usb_serial_disconnect,
110 .id_table = id_table,
111 .no_dynamic_id = 1,
112 };
113
114 static struct usb_serial_driver kl5kusb105d_device = {
115 .driver = {
116 .owner = THIS_MODULE,
117 .name = "kl5kusb105d",
118 },
119 .description = "KL5KUSB105D / PalmConnect",
120 .usb_driver = &kl5kusb105d_driver,
121 .id_table = id_table,
122 .num_ports = 1,
123 .open = klsi_105_open,
124 .close = klsi_105_close,
125 .write = klsi_105_write,
126 .write_bulk_callback = klsi_105_write_bulk_callback,
127 .chars_in_buffer = klsi_105_chars_in_buffer,
128 .write_room = klsi_105_write_room,
129 .read_bulk_callback = klsi_105_read_bulk_callback,
130 .set_termios = klsi_105_set_termios,
131 /*.break_ctl = klsi_105_break_ctl,*/
132 .tiocmget = klsi_105_tiocmget,
133 .tiocmset = klsi_105_tiocmset,
134 .attach = klsi_105_startup,
135 .shutdown = klsi_105_shutdown,
136 .throttle = klsi_105_throttle,
137 .unthrottle = klsi_105_unthrottle,
138 };
139
140 struct klsi_105_port_settings {
141 __u8 pktlen; /* always 5, it seems */
142 __u8 baudrate;
143 __u8 databits;
144 __u8 unknown1;
145 __u8 unknown2;
146 } __attribute__ ((packed));
147
148 /* we implement a pool of NUM_URBS urbs per usb_serial */
149 #define NUM_URBS 1
150 #define URB_TRANSFER_BUFFER_SIZE 64
151 struct klsi_105_private {
152 struct klsi_105_port_settings cfg;
153 struct ktermios termios;
154 unsigned long line_state; /* modem line settings */
155 /* write pool */
156 struct urb *write_urb_pool[NUM_URBS];
157 spinlock_t lock;
158 unsigned long bytes_in;
159 unsigned long bytes_out;
160 };
161
162
163 /*
164 * Handle vendor specific USB requests
165 */
166
167
168 #define KLSI_TIMEOUT 5000 /* default urb timeout */
169
170 static int klsi_105_chg_port_settings(struct usb_serial_port *port,
171 struct klsi_105_port_settings *settings)
172 {
173 int rc;
174
175 rc = usb_control_msg(port->serial->dev,
176 usb_sndctrlpipe(port->serial->dev, 0),
177 KL5KUSB105A_SIO_SET_DATA,
178 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE,
179 0, /* value */
180 0, /* index */
181 settings,
182 sizeof(struct klsi_105_port_settings),
183 KLSI_TIMEOUT);
184 if (rc < 0)
185 err("Change port settings failed (error = %d)", rc);
186 info("%s - %d byte block, baudrate %x, databits %d, u1 %d, u2 %d",
187 __func__,
188 settings->pktlen,
189 settings->baudrate, settings->databits,
190 settings->unknown1, settings->unknown2);
191 return rc;
192 } /* klsi_105_chg_port_settings */
193
194 /* translate a 16-bit status value from the device to linux's TIO bits */
195 static unsigned long klsi_105_status2linestate(const __u16 status)
196 {
197 unsigned long res = 0;
198
199 res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0)
200 | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0)
201 ;
202
203 return res;
204 }
205 /*
206 * Read line control via vendor command and return result through
207 * *line_state_p
208 */
209 /* It seems that the status buffer has always only 2 bytes length */
210 #define KLSI_STATUSBUF_LEN 2
211 static int klsi_105_get_line_state(struct usb_serial_port *port,
212 unsigned long *line_state_p)
213 {
214 int rc;
215 __u8 status_buf[KLSI_STATUSBUF_LEN] = { -1, -1};
216 __u16 status;
217
218 info("%s - sending SIO Poll request", __func__);
219 rc = usb_control_msg(port->serial->dev,
220 usb_rcvctrlpipe(port->serial->dev, 0),
221 KL5KUSB105A_SIO_POLL,
222 USB_TYPE_VENDOR | USB_DIR_IN,
223 0, /* value */
224 0, /* index */
225 status_buf, KLSI_STATUSBUF_LEN,
226 10000
227 );
228 if (rc < 0)
229 err("Reading line status failed (error = %d)", rc);
230 else {
231 status = get_unaligned_le16(status_buf);
232
233 info("%s - read status %x %x", __func__,
234 status_buf[0], status_buf[1]);
235
236 *line_state_p = klsi_105_status2linestate(status);
237 }
238 return rc;
239 }
240
241
242 /*
243 * Driver's tty interface functions
244 */
245
246 static int klsi_105_startup(struct usb_serial *serial)
247 {
248 struct klsi_105_private *priv;
249 int i, j;
250
251 /* check if we support the product id (see keyspan.c)
252 * FIXME
253 */
254
255 /* allocate the private data structure */
256 for (i = 0; i < serial->num_ports; i++) {
257 priv = kmalloc(sizeof(struct klsi_105_private),
258 GFP_KERNEL);
259 if (!priv) {
260 dbg("%skmalloc for klsi_105_private failed.", __func__);
261 i--;
262 goto err_cleanup;
263 }
264 /* set initial values for control structures */
265 priv->cfg.pktlen = 5;
266 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
267 priv->cfg.databits = kl5kusb105a_dtb_8;
268 priv->cfg.unknown1 = 0;
269 priv->cfg.unknown2 = 1;
270
271 priv->line_state = 0;
272
273 priv->bytes_in = 0;
274 priv->bytes_out = 0;
275 usb_set_serial_port_data(serial->port[i], priv);
276
277 spin_lock_init(&priv->lock);
278 for (j = 0; j < NUM_URBS; j++) {
279 struct urb *urb = usb_alloc_urb(0, GFP_KERNEL);
280
281 priv->write_urb_pool[j] = urb;
282 if (urb == NULL) {
283 err("No more urbs???");
284 goto err_cleanup;
285 }
286
287 urb->transfer_buffer =
288 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
289 if (!urb->transfer_buffer) {
290 err("%s - out of memory for urb buffers.",
291 __func__);
292 goto err_cleanup;
293 }
294 }
295
296 /* priv->termios is left uninitalized until port opening */
297 init_waitqueue_head(&serial->port[i]->write_wait);
298 }
299
300 return 0;
301
302 err_cleanup:
303 for (; i >= 0; i--) {
304 priv = usb_get_serial_port_data(serial->port[i]);
305 for (j = 0; j < NUM_URBS; j++) {
306 if (priv->write_urb_pool[j]) {
307 kfree(priv->write_urb_pool[j]->transfer_buffer);
308 usb_free_urb(priv->write_urb_pool[j]);
309 }
310 }
311 usb_set_serial_port_data(serial->port[i], NULL);
312 }
313 return -ENOMEM;
314 } /* klsi_105_startup */
315
316
317 static void klsi_105_shutdown(struct usb_serial *serial)
318 {
319 int i;
320
321 dbg("%s", __func__);
322
323 /* stop reads and writes on all ports */
324 for (i = 0; i < serial->num_ports; ++i) {
325 struct klsi_105_private *priv =
326 usb_get_serial_port_data(serial->port[i]);
327 unsigned long flags;
328
329 if (priv) {
330 /* kill our write urb pool */
331 int j;
332 struct urb **write_urbs = priv->write_urb_pool;
333 spin_lock_irqsave(&priv->lock, flags);
334
335 for (j = 0; j < NUM_URBS; j++) {
336 if (write_urbs[j]) {
337 /* FIXME - uncomment the following
338 * usb_kill_urb call when the host
339 * controllers get fixed to set
340 * urb->dev = NULL after the urb is
341 * finished. Otherwise this call
342 * oopses. */
343 /* usb_kill_urb(write_urbs[j]); */
344 kfree(write_urbs[j]->transfer_buffer);
345 usb_free_urb(write_urbs[j]);
346 }
347 }
348 spin_unlock_irqrestore(&priv->lock, flags);
349 kfree(priv);
350 usb_set_serial_port_data(serial->port[i], NULL);
351 }
352 }
353 } /* klsi_105_shutdown */
354
355 static int klsi_105_open(struct tty_struct *tty,
356 struct usb_serial_port *port, struct file *filp)
357 {
358 struct klsi_105_private *priv = usb_get_serial_port_data(port);
359 int retval = 0;
360 int rc;
361 int i;
362 unsigned long line_state;
363 struct klsi_105_port_settings cfg;
364 unsigned long flags;
365
366 dbg("%s port %d", __func__, port->number);
367
368 /* force low_latency on so that our tty_push actually forces
369 * the data through
370 * tty->low_latency = 1; */
371
372 /* Do a defined restart:
373 * Set up sane default baud rate and send the 'READ_ON'
374 * vendor command.
375 * FIXME: set modem line control (how?)
376 * Then read the modem line control and store values in
377 * priv->line_state.
378 */
379 cfg.pktlen = 5;
380 cfg.baudrate = kl5kusb105a_sio_b9600;
381 cfg.databits = kl5kusb105a_dtb_8;
382 cfg.unknown1 = 0;
383 cfg.unknown2 = 1;
384 klsi_105_chg_port_settings(port, &cfg);
385
386 /* set up termios structure */
387 spin_lock_irqsave(&priv->lock, flags);
388 priv->termios.c_iflag = tty->termios->c_iflag;
389 priv->termios.c_oflag = tty->termios->c_oflag;
390 priv->termios.c_cflag = tty->termios->c_cflag;
391 priv->termios.c_lflag = tty->termios->c_lflag;
392 for (i = 0; i < NCCS; i++)
393 priv->termios.c_cc[i] = tty->termios->c_cc[i];
394 priv->cfg.pktlen = cfg.pktlen;
395 priv->cfg.baudrate = cfg.baudrate;
396 priv->cfg.databits = cfg.databits;
397 priv->cfg.unknown1 = cfg.unknown1;
398 priv->cfg.unknown2 = cfg.unknown2;
399 spin_unlock_irqrestore(&priv->lock, flags);
400
401 /* READ_ON and urb submission */
402 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
403 usb_rcvbulkpipe(port->serial->dev,
404 port->bulk_in_endpointAddress),
405 port->read_urb->transfer_buffer,
406 port->read_urb->transfer_buffer_length,
407 klsi_105_read_bulk_callback,
408 port);
409
410 rc = usb_submit_urb(port->read_urb, GFP_KERNEL);
411 if (rc) {
412 err("%s - failed submitting read urb, error %d", __func__, rc);
413 retval = rc;
414 goto exit;
415 }
416
417 rc = usb_control_msg(port->serial->dev,
418 usb_sndctrlpipe(port->serial->dev, 0),
419 KL5KUSB105A_SIO_CONFIGURE,
420 USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
421 KL5KUSB105A_SIO_CONFIGURE_READ_ON,
422 0, /* index */
423 NULL,
424 0,
425 KLSI_TIMEOUT);
426 if (rc < 0) {
427 err("Enabling read failed (error = %d)", rc);
428 retval = rc;
429 } else
430 dbg("%s - enabled reading", __func__);
431
432 rc = klsi_105_get_line_state(port, &line_state);
433 if (rc >= 0) {
434 spin_lock_irqsave(&priv->lock, flags);
435 priv->line_state = line_state;
436 spin_unlock_irqrestore(&priv->lock, flags);
437 dbg("%s - read line state 0x%lx", __func__, line_state);
438 retval = 0;
439 } else
440 retval = rc;
441
442 exit:
443 return retval;
444 } /* klsi_105_open */
445
446
447 static void klsi_105_close(struct tty_struct *tty,
448 struct usb_serial_port *port, struct file *filp)
449 {
450 struct klsi_105_private *priv = usb_get_serial_port_data(port);
451 int rc;
452
453 dbg("%s port %d", __func__, port->number);
454
455 mutex_lock(&port->serial->disc_mutex);
456 if (!port->serial->disconnected) {
457 /* send READ_OFF */
458 rc = usb_control_msg(port->serial->dev,
459 usb_sndctrlpipe(port->serial->dev, 0),
460 KL5KUSB105A_SIO_CONFIGURE,
461 USB_TYPE_VENDOR | USB_DIR_OUT,
462 KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
463 0, /* index */
464 NULL, 0,
465 KLSI_TIMEOUT);
466 if (rc < 0)
467 err("Disabling read failed (error = %d)", rc);
468 }
469 mutex_unlock(&port->serial->disc_mutex);
470
471 /* shutdown our bulk reads and writes */
472 usb_kill_urb(port->write_urb);
473 usb_kill_urb(port->read_urb);
474 /* unlink our write pool */
475 /* FIXME */
476 /* wgg - do I need this? I think so. */
477 usb_kill_urb(port->interrupt_in_urb);
478 info("kl5kusb105 port stats: %ld bytes in, %ld bytes out",
479 priv->bytes_in, priv->bytes_out);
480 } /* klsi_105_close */
481
482
483 /* We need to write a complete 64-byte data block and encode the
484 * number actually sent in the first double-byte, LSB-order. That
485 * leaves at most 62 bytes of payload.
486 */
487 #define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */
488
489
490 static int klsi_105_write(struct tty_struct *tty,
491 struct usb_serial_port *port, const unsigned char *buf, int count)
492 {
493 struct klsi_105_private *priv = usb_get_serial_port_data(port);
494 int result, size;
495 int bytes_sent = 0;
496
497 dbg("%s - port %d", __func__, port->number);
498
499 while (count > 0) {
500 /* try to find a free urb (write 0 bytes if none) */
501 struct urb *urb = NULL;
502 unsigned long flags;
503 int i;
504 /* since the pool is per-port we might not need
505 the spin lock !? */
506 spin_lock_irqsave(&priv->lock, flags);
507 for (i = 0; i < NUM_URBS; i++) {
508 if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
509 urb = priv->write_urb_pool[i];
510 dbg("%s - using pool URB %d", __func__, i);
511 break;
512 }
513 }
514 spin_unlock_irqrestore(&priv->lock, flags);
515
516 if (urb == NULL) {
517 dbg("%s - no more free urbs", __func__);
518 goto exit;
519 }
520
521 if (urb->transfer_buffer == NULL) {
522 urb->transfer_buffer =
523 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
524 if (urb->transfer_buffer == NULL) {
525 err("%s - no more kernel memory...", __func__);
526 goto exit;
527 }
528 }
529
530 size = min(count, port->bulk_out_size - KLSI_105_DATA_OFFSET);
531 size = min(size, URB_TRANSFER_BUFFER_SIZE -
532 KLSI_105_DATA_OFFSET);
533
534 memcpy(urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size);
535
536 /* write payload size into transfer buffer */
537 ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF);
538 ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8);
539
540 /* set up our urb */
541 usb_fill_bulk_urb(urb, port->serial->dev,
542 usb_sndbulkpipe(port->serial->dev,
543 port->bulk_out_endpointAddress),
544 urb->transfer_buffer,
545 URB_TRANSFER_BUFFER_SIZE,
546 klsi_105_write_bulk_callback,
547 port);
548
549 /* send the data out the bulk port */
550 result = usb_submit_urb(urb, GFP_ATOMIC);
551 if (result) {
552 err("%s - failed submitting write urb, error %d",
553 __func__, result);
554 goto exit;
555 }
556 buf += size;
557 bytes_sent += size;
558 count -= size;
559 }
560 exit:
561 /* lockless, but it's for debug info only... */
562 priv->bytes_out += bytes_sent;
563
564 return bytes_sent; /* that's how much we wrote */
565 } /* klsi_105_write */
566
567 static void klsi_105_write_bulk_callback(struct urb *urb)
568 {
569 struct usb_serial_port *port = urb->context;
570 int status = urb->status;
571
572 dbg("%s - port %d", __func__, port->number);
573
574 if (status) {
575 dbg("%s - nonzero write bulk status received: %d", __func__,
576 status);
577 return;
578 }
579
580 usb_serial_port_softint(port);
581 } /* klsi_105_write_bulk_completion_callback */
582
583
584 /* return number of characters currently in the writing process */
585 static int klsi_105_chars_in_buffer(struct tty_struct *tty)
586 {
587 struct usb_serial_port *port = tty->driver_data;
588 int chars = 0;
589 int i;
590 unsigned long flags;
591 struct klsi_105_private *priv = usb_get_serial_port_data(port);
592
593 spin_lock_irqsave(&priv->lock, flags);
594
595 for (i = 0; i < NUM_URBS; ++i) {
596 if (priv->write_urb_pool[i]->status == -EINPROGRESS)
597 chars += URB_TRANSFER_BUFFER_SIZE;
598 }
599
600 spin_unlock_irqrestore(&priv->lock, flags);
601
602 dbg("%s - returns %d", __func__, chars);
603 return chars;
604 }
605
606 static int klsi_105_write_room(struct tty_struct *tty)
607 {
608 struct usb_serial_port *port = tty->driver_data;
609 unsigned long flags;
610 int i;
611 int room = 0;
612 struct klsi_105_private *priv = usb_get_serial_port_data(port);
613
614 spin_lock_irqsave(&priv->lock, flags);
615 for (i = 0; i < NUM_URBS; ++i) {
616 if (priv->write_urb_pool[i]->status != -EINPROGRESS)
617 room += URB_TRANSFER_BUFFER_SIZE;
618 }
619
620 spin_unlock_irqrestore(&priv->lock, flags);
621
622 dbg("%s - returns %d", __func__, room);
623 return room;
624 }
625
626
627
628 static void klsi_105_read_bulk_callback(struct urb *urb)
629 {
630 struct usb_serial_port *port = urb->context;
631 struct klsi_105_private *priv = usb_get_serial_port_data(port);
632 struct tty_struct *tty;
633 unsigned char *data = urb->transfer_buffer;
634 int rc;
635 int status = urb->status;
636
637 dbg("%s - port %d", __func__, port->number);
638
639 /* The urb might have been killed. */
640 if (status) {
641 dbg("%s - nonzero read bulk status received: %d", __func__,
642 status);
643 return;
644 }
645
646 /* The data received is again preceded by a length double-byte in LSB-
647 * first order (see klsi_105_write() )
648 */
649 if (urb->actual_length == 0) {
650 /* empty urbs seem to happen, we ignore them */
651 /* dbg("%s - emtpy URB", __func__); */
652 ;
653 } else if (urb->actual_length <= 2) {
654 dbg("%s - size %d URB not understood", __func__,
655 urb->actual_length);
656 usb_serial_debug_data(debug, &port->dev, __func__,
657 urb->actual_length, data);
658 } else {
659 int bytes_sent = ((__u8 *) data)[0] +
660 ((unsigned int) ((__u8 *) data)[1] << 8);
661 tty = tty_port_tty_get(&port->port);
662 /* we should immediately resubmit the URB, before attempting
663 * to pass the data on to the tty layer. But that needs locking
664 * against re-entry an then mixed-up data because of
665 * intermixed tty_flip_buffer_push()s
666 * FIXME
667 */
668 usb_serial_debug_data(debug, &port->dev, __func__,
669 urb->actual_length, data);
670
671 if (bytes_sent + 2 > urb->actual_length) {
672 dbg("%s - trying to read more data than available"
673 " (%d vs. %d)", __func__,
674 bytes_sent+2, urb->actual_length);
675 /* cap at implied limit */
676 bytes_sent = urb->actual_length - 2;
677 }
678
679 tty_buffer_request_room(tty, bytes_sent);
680 tty_insert_flip_string(tty, data + 2, bytes_sent);
681 tty_flip_buffer_push(tty);
682 tty_kref_put(tty);
683
684 /* again lockless, but debug info only */
685 priv->bytes_in += bytes_sent;
686 }
687 /* Continue trying to always read */
688 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
689 usb_rcvbulkpipe(port->serial->dev,
690 port->bulk_in_endpointAddress),
691 port->read_urb->transfer_buffer,
692 port->read_urb->transfer_buffer_length,
693 klsi_105_read_bulk_callback,
694 port);
695 rc = usb_submit_urb(port->read_urb, GFP_ATOMIC);
696 if (rc)
697 err("%s - failed resubmitting read urb, error %d",
698 __func__, rc);
699 } /* klsi_105_read_bulk_callback */
700
701
702 static void klsi_105_set_termios(struct tty_struct *tty,
703 struct usb_serial_port *port,
704 struct ktermios *old_termios)
705 {
706 struct klsi_105_private *priv = usb_get_serial_port_data(port);
707 unsigned int iflag = tty->termios->c_iflag;
708 unsigned int old_iflag = old_termios->c_iflag;
709 unsigned int cflag = tty->termios->c_cflag;
710 unsigned int old_cflag = old_termios->c_cflag;
711 struct klsi_105_port_settings cfg;
712 unsigned long flags;
713 speed_t baud;
714
715 /* lock while we are modifying the settings */
716 spin_lock_irqsave(&priv->lock, flags);
717
718 /*
719 * Update baud rate
720 */
721 baud = tty_get_baud_rate(tty);
722
723 if ((cflag & CBAUD) != (old_cflag & CBAUD)) {
724 /* reassert DTR and (maybe) RTS on transition from B0 */
725 if ((old_cflag & CBAUD) == B0) {
726 dbg("%s: baud was B0", __func__);
727 #if 0
728 priv->control_state |= TIOCM_DTR;
729 /* don't set RTS if using hardware flow control */
730 if (!(old_cflag & CRTSCTS))
731 priv->control_state |= TIOCM_RTS;
732 mct_u232_set_modem_ctrl(serial, priv->control_state);
733 #endif
734 }
735 }
736 switch (baud) {
737 case 0: /* handled below */
738 break;
739 case 1200:
740 priv->cfg.baudrate = kl5kusb105a_sio_b1200;
741 break;
742 case 2400:
743 priv->cfg.baudrate = kl5kusb105a_sio_b2400;
744 break;
745 case 4800:
746 priv->cfg.baudrate = kl5kusb105a_sio_b4800;
747 break;
748 case 9600:
749 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
750 break;
751 case 19200:
752 priv->cfg.baudrate = kl5kusb105a_sio_b19200;
753 break;
754 case 38400:
755 priv->cfg.baudrate = kl5kusb105a_sio_b38400;
756 break;
757 case 57600:
758 priv->cfg.baudrate = kl5kusb105a_sio_b57600;
759 break;
760 case 115200:
761 priv->cfg.baudrate = kl5kusb105a_sio_b115200;
762 break;
763 default:
764 dbg("KLSI USB->Serial converter:"
765 " unsupported baudrate request, using default of 9600");
766 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
767 baud = 9600;
768 break;
769 }
770 if ((cflag & CBAUD) == B0) {
771 dbg("%s: baud is B0", __func__);
772 /* Drop RTS and DTR */
773 /* maybe this should be simulated by sending read
774 * disable and read enable messages?
775 */
776 ;
777 #if 0
778 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
779 mct_u232_set_modem_ctrl(serial, priv->control_state);
780 #endif
781 }
782 tty_encode_baud_rate(tty, baud, baud);
783
784 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
785 /* set the number of data bits */
786 switch (cflag & CSIZE) {
787 case CS5:
788 dbg("%s - 5 bits/byte not supported", __func__);
789 spin_unlock_irqrestore(&priv->lock, flags);
790 return ;
791 case CS6:
792 dbg("%s - 6 bits/byte not supported", __func__);
793 spin_unlock_irqrestore(&priv->lock, flags);
794 return ;
795 case CS7:
796 priv->cfg.databits = kl5kusb105a_dtb_7;
797 break;
798 case CS8:
799 priv->cfg.databits = kl5kusb105a_dtb_8;
800 break;
801 default:
802 err("CSIZE was not CS5-CS8, using default of 8");
803 priv->cfg.databits = kl5kusb105a_dtb_8;
804 break;
805 }
806 }
807
808 /*
809 * Update line control register (LCR)
810 */
811 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
812 || (cflag & CSTOPB) != (old_cflag & CSTOPB)) {
813 /* Not currently supported */
814 tty->termios->c_cflag &= ~(PARENB|PARODD|CSTOPB);
815 #if 0
816 priv->last_lcr = 0;
817
818 /* set the parity */
819 if (cflag & PARENB)
820 priv->last_lcr |= (cflag & PARODD) ?
821 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
822 else
823 priv->last_lcr |= MCT_U232_PARITY_NONE;
824
825 /* set the number of stop bits */
826 priv->last_lcr |= (cflag & CSTOPB) ?
827 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
828
829 mct_u232_set_line_ctrl(serial, priv->last_lcr);
830 #endif
831 ;
832 }
833 /*
834 * Set flow control: well, I do not really now how to handle DTR/RTS.
835 * Just do what we have seen with SniffUSB on Win98.
836 */
837 if ((iflag & IXOFF) != (old_iflag & IXOFF)
838 || (iflag & IXON) != (old_iflag & IXON)
839 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
840 /* Not currently supported */
841 tty->termios->c_cflag &= ~CRTSCTS;
842 /* Drop DTR/RTS if no flow control otherwise assert */
843 #if 0
844 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS))
845 priv->control_state |= TIOCM_DTR | TIOCM_RTS;
846 else
847 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
848 mct_u232_set_modem_ctrl(serial, priv->control_state);
849 #endif
850 ;
851 }
852 memcpy(&cfg, &priv->cfg, sizeof(cfg));
853 spin_unlock_irqrestore(&priv->lock, flags);
854
855 /* now commit changes to device */
856 klsi_105_chg_port_settings(port, &cfg);
857 } /* klsi_105_set_termios */
858
859
860 #if 0
861 static void mct_u232_break_ctl(struct tty_struct *tty, int break_state)
862 {
863 struct usb_serial_port *port = tty->driver_data;
864 struct usb_serial *serial = port->serial;
865 struct mct_u232_private *priv =
866 (struct mct_u232_private *)port->private;
867 unsigned char lcr = priv->last_lcr;
868
869 dbg("%sstate=%d", __func__, break_state);
870
871 if (break_state)
872 lcr |= MCT_U232_SET_BREAK;
873
874 mct_u232_set_line_ctrl(serial, lcr);
875 } /* mct_u232_break_ctl */
876 #endif
877
878 static int klsi_105_tiocmget(struct tty_struct *tty, struct file *file)
879 {
880 struct usb_serial_port *port = tty->driver_data;
881 struct klsi_105_private *priv = usb_get_serial_port_data(port);
882 unsigned long flags;
883 int rc;
884 unsigned long line_state;
885 dbg("%s - request, just guessing", __func__);
886
887 rc = klsi_105_get_line_state(port, &line_state);
888 if (rc < 0) {
889 err("Reading line control failed (error = %d)", rc);
890 /* better return value? EAGAIN? */
891 return rc;
892 }
893
894 spin_lock_irqsave(&priv->lock, flags);
895 priv->line_state = line_state;
896 spin_unlock_irqrestore(&priv->lock, flags);
897 dbg("%s - read line state 0x%lx", __func__, line_state);
898 return (int)line_state;
899 }
900
901 static int klsi_105_tiocmset(struct tty_struct *tty, struct file *file,
902 unsigned int set, unsigned int clear)
903 {
904 int retval = -EINVAL;
905
906 dbg("%s", __func__);
907
908 /* if this ever gets implemented, it should be done something like this:
909 struct usb_serial *serial = port->serial;
910 struct klsi_105_private *priv = usb_get_serial_port_data(port);
911 unsigned long flags;
912 int control;
913
914 spin_lock_irqsave (&priv->lock, flags);
915 if (set & TIOCM_RTS)
916 priv->control_state |= TIOCM_RTS;
917 if (set & TIOCM_DTR)
918 priv->control_state |= TIOCM_DTR;
919 if (clear & TIOCM_RTS)
920 priv->control_state &= ~TIOCM_RTS;
921 if (clear & TIOCM_DTR)
922 priv->control_state &= ~TIOCM_DTR;
923 control = priv->control_state;
924 spin_unlock_irqrestore (&priv->lock, flags);
925 retval = mct_u232_set_modem_ctrl(serial, control);
926 */
927 return retval;
928 }
929
930 static void klsi_105_throttle(struct tty_struct *tty)
931 {
932 struct usb_serial_port *port = tty->driver_data;
933 dbg("%s - port %d", __func__, port->number);
934 usb_kill_urb(port->read_urb);
935 }
936
937 static void klsi_105_unthrottle(struct tty_struct *tty)
938 {
939 struct usb_serial_port *port = tty->driver_data;
940 int result;
941
942 dbg("%s - port %d", __func__, port->number);
943
944 port->read_urb->dev = port->serial->dev;
945 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
946 if (result)
947 err("%s - failed submitting read urb, error %d", __func__,
948 result);
949 }
950
951
952
953 static int __init klsi_105_init(void)
954 {
955 int retval;
956 retval = usb_serial_register(&kl5kusb105d_device);
957 if (retval)
958 goto failed_usb_serial_register;
959 retval = usb_register(&kl5kusb105d_driver);
960 if (retval)
961 goto failed_usb_register;
962
963 info(DRIVER_DESC " " DRIVER_VERSION);
964 return 0;
965 failed_usb_register:
966 usb_serial_deregister(&kl5kusb105d_device);
967 failed_usb_serial_register:
968 return retval;
969 }
970
971
972 static void __exit klsi_105_exit(void)
973 {
974 usb_deregister(&kl5kusb105d_driver);
975 usb_serial_deregister(&kl5kusb105d_device);
976 }
977
978
979 module_init(klsi_105_init);
980 module_exit(klsi_105_exit);
981
982 MODULE_AUTHOR(DRIVER_AUTHOR);
983 MODULE_DESCRIPTION(DRIVER_DESC);
984 MODULE_LICENSE("GPL");
985
986
987 module_param(debug, bool, S_IRUGO | S_IWUSR);
988 MODULE_PARM_DESC(debug, "enable extensive debugging messages");
989
990 /* vim: set sts=8 ts=8 sw=8: */
Linux kernel - Deliverables
This page took 0.269389 seconds and 6 git commands to generate.