projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'parisc' from /home/kyle/repos/parisc-2.6.git
[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 <asm/uaccess.h>
57 #include <linux/usb.h>
58 #include <linux/usb/serial.h>
59 #include "kl5kusb105.h"
60
61 static int debug;
62
63 /*
64 * Version Information
65 */
66 #define DRIVER_VERSION "v0.3a"
67 #define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>"
68 #define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver"
69
70
71 /*
72 * Function prototypes
73 */
74 static int klsi_105_startup (struct usb_serial *serial);
75 static void klsi_105_shutdown (struct usb_serial *serial);
76 static int klsi_105_open (struct usb_serial_port *port,
77 struct file *filp);
78 static void klsi_105_close (struct usb_serial_port *port,
79 struct file *filp);
80 static int klsi_105_write (struct usb_serial_port *port,
81 const unsigned char *buf,
82 int count);
83 static void klsi_105_write_bulk_callback (struct urb *urb);
84 static int klsi_105_chars_in_buffer (struct usb_serial_port *port);
85 static int klsi_105_write_room (struct usb_serial_port *port);
86
87 static void klsi_105_read_bulk_callback (struct urb *urb);
88 static void klsi_105_set_termios (struct usb_serial_port *port,
89 struct ktermios *old);
90 static void klsi_105_throttle (struct usb_serial_port *port);
91 static void klsi_105_unthrottle (struct usb_serial_port *port);
92 /*
93 static void klsi_105_break_ctl (struct usb_serial_port *port,
94 int break_state );
95 */
96 static int klsi_105_tiocmget (struct usb_serial_port *port,
97 struct file *file);
98 static int klsi_105_tiocmset (struct usb_serial_port *port,
99 struct file *file, unsigned int set,
100 unsigned int clear);
101
102 /*
103 * All of the device info needed for the KLSI converters.
104 */
105 static struct usb_device_id id_table [] = {
106 { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) },
107 { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) },
108 { } /* Terminating entry */
109 };
110
111 MODULE_DEVICE_TABLE (usb, id_table);
112
113 static struct usb_driver kl5kusb105d_driver = {
114 .name = "kl5kusb105d",
115 .probe = usb_serial_probe,
116 .disconnect = usb_serial_disconnect,
117 .id_table = id_table,
118 .no_dynamic_id = 1,
119 };
120
121 static struct usb_serial_driver kl5kusb105d_device = {
122 .driver = {
123 .owner = THIS_MODULE,
124 .name = "kl5kusb105d",
125 },
126 .description = "KL5KUSB105D / PalmConnect",
127 .id_table = id_table,
128 .num_interrupt_in = 1,
129 .num_bulk_in = 1,
130 .num_bulk_out = 1,
131 .num_ports = 1,
132 .open = klsi_105_open,
133 .close = klsi_105_close,
134 .write = klsi_105_write,
135 .write_bulk_callback = klsi_105_write_bulk_callback,
136 .chars_in_buffer = klsi_105_chars_in_buffer,
137 .write_room = klsi_105_write_room,
138 .read_bulk_callback =klsi_105_read_bulk_callback,
139 .set_termios = klsi_105_set_termios,
140 /*.break_ctl = klsi_105_break_ctl,*/
141 .tiocmget = klsi_105_tiocmget,
142 .tiocmset = klsi_105_tiocmset,
143 .attach = klsi_105_startup,
144 .shutdown = klsi_105_shutdown,
145 .throttle = klsi_105_throttle,
146 .unthrottle = klsi_105_unthrottle,
147 };
148
149 struct klsi_105_port_settings {
150 __u8 pktlen; /* always 5, it seems */
151 __u8 baudrate;
152 __u8 databits;
153 __u8 unknown1;
154 __u8 unknown2;
155 } __attribute__ ((packed));
156
157 /* we implement a pool of NUM_URBS urbs per usb_serial */
158 #define NUM_URBS 1
159 #define URB_TRANSFER_BUFFER_SIZE 64
160 struct klsi_105_private {
161 struct klsi_105_port_settings cfg;
162 struct ktermios termios;
163 unsigned long line_state; /* modem line settings */
164 /* write pool */
165 struct urb * write_urb_pool[NUM_URBS];
166 spinlock_t lock;
167 unsigned long bytes_in;
168 unsigned long bytes_out;
169 };
170
171
172 /*
173 * Handle vendor specific USB requests
174 */
175
176
177 #define KLSI_TIMEOUT 5000 /* default urb timeout */
178
179 static int klsi_105_chg_port_settings(struct usb_serial_port *port,
180 struct klsi_105_port_settings *settings)
181 {
182 int rc;
183
184 rc = usb_control_msg(port->serial->dev,
185 usb_sndctrlpipe(port->serial->dev, 0),
186 KL5KUSB105A_SIO_SET_DATA,
187 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE,
188 0, /* value */
189 0, /* index */
190 settings,
191 sizeof(struct klsi_105_port_settings),
192 KLSI_TIMEOUT);
193 if (rc < 0)
194 err("Change port settings failed (error = %d)", rc);
195 info("%s - %d byte block, baudrate %x, databits %d, u1 %d, u2 %d",
196 __FUNCTION__,
197 settings->pktlen,
198 settings->baudrate, settings->databits,
199 settings->unknown1, settings->unknown2);
200 return rc;
201 } /* klsi_105_chg_port_settings */
202
203 /* translate a 16-bit status value from the device to linux's TIO bits */
204 static unsigned long klsi_105_status2linestate(const __u16 status)
205 {
206 unsigned long res = 0;
207
208 res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0)
209 | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0)
210 ;
211
212 return res;
213 }
214 /*
215 * Read line control via vendor command and return result through
216 * *line_state_p
217 */
218 /* It seems that the status buffer has always only 2 bytes length */
219 #define KLSI_STATUSBUF_LEN 2
220 static int klsi_105_get_line_state(struct usb_serial_port *port,
221 unsigned long *line_state_p)
222 {
223 int rc;
224 __u8 status_buf[KLSI_STATUSBUF_LEN] = { -1,-1};
225 __u16 status;
226
227 info("%s - sending SIO Poll request", __FUNCTION__);
228 rc = usb_control_msg(port->serial->dev,
229 usb_rcvctrlpipe(port->serial->dev, 0),
230 KL5KUSB105A_SIO_POLL,
231 USB_TYPE_VENDOR | USB_DIR_IN,
232 0, /* value */
233 0, /* index */
234 status_buf, KLSI_STATUSBUF_LEN,
235 10000
236 );
237 if (rc < 0)
238 err("Reading line status failed (error = %d)", rc);
239 else {
240 status = status_buf[0] + (status_buf[1]<<8);
241
242 info("%s - read status %x %x", __FUNCTION__,
243 status_buf[0], status_buf[1]);
244
245 *line_state_p = klsi_105_status2linestate(status);
246 }
247
248 return rc;
249 }
250
251
252 /*
253 * Driver's tty interface functions
254 */
255
256 static int klsi_105_startup (struct usb_serial *serial)
257 {
258 struct klsi_105_private *priv;
259 int i;
260
261 /* check if we support the product id (see keyspan.c)
262 * FIXME
263 */
264
265 /* allocate the private data structure */
266 for (i=0; i<serial->num_ports; i++) {
267 int j;
268 priv = kmalloc(sizeof(struct klsi_105_private),
269 GFP_KERNEL);
270 if (!priv) {
271 dbg("%skmalloc for klsi_105_private failed.", __FUNCTION__);
272 return -ENOMEM;
273 }
274 /* set initial values for control structures */
275 priv->cfg.pktlen = 5;
276 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
277 priv->cfg.databits = kl5kusb105a_dtb_8;
278 priv->cfg.unknown1 = 0;
279 priv->cfg.unknown2 = 1;
280
281 priv->line_state = 0;
282
283 priv->bytes_in = 0;
284 priv->bytes_out = 0;
285 usb_set_serial_port_data(serial->port[i], priv);
286
287 spin_lock_init (&priv->lock);
288 for (j=0; j<NUM_URBS; j++) {
289 struct urb* urb = usb_alloc_urb(0, GFP_KERNEL);
290
291 priv->write_urb_pool[j] = urb;
292 if (urb == NULL) {
293 err("No more urbs???");
294 continue;
295 }
296
297 urb->transfer_buffer = NULL;
298 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE,
299 GFP_KERNEL);
300 if (!urb->transfer_buffer) {
301 err("%s - out of memory for urb buffers.", __FUNCTION__);
302 continue;
303 }
304 }
305
306 /* priv->termios is left uninitalized until port opening */
307 init_waitqueue_head(&serial->port[i]->write_wait);
308 }
309
310 return (0);
311 } /* klsi_105_startup */
312
313
314 static void klsi_105_shutdown (struct usb_serial *serial)
315 {
316 int i;
317
318 dbg("%s", __FUNCTION__);
319
320 /* stop reads and writes on all ports */
321 for (i=0; i < serial->num_ports; ++i) {
322 struct klsi_105_private *priv = usb_get_serial_port_data(serial->port[i]);
323 unsigned long flags;
324
325 if (priv) {
326 /* kill our write urb pool */
327 int j;
328 struct urb **write_urbs = priv->write_urb_pool;
329 spin_lock_irqsave(&priv->lock,flags);
330
331 for (j = 0; j < NUM_URBS; j++) {
332 if (write_urbs[j]) {
333 /* FIXME - uncomment the following
334 * usb_kill_urb call when the host
335 * controllers get fixed to set
336 * urb->dev = NULL after the urb is
337 * finished. Otherwise this call
338 * oopses. */
339 /* usb_kill_urb(write_urbs[j]); */
340 kfree(write_urbs[j]->transfer_buffer);
341 usb_free_urb (write_urbs[j]);
342 }
343 }
344
345 spin_unlock_irqrestore (&priv->lock, flags);
346
347 kfree(priv);
348 usb_set_serial_port_data(serial->port[i], NULL);
349 }
350 }
351 } /* klsi_105_shutdown */
352
353 static int klsi_105_open (struct usb_serial_port *port, struct file *filp)
354 {
355 struct klsi_105_private *priv = usb_get_serial_port_data(port);
356 int retval = 0;
357 int rc;
358 int i;
359 unsigned long line_state;
360 struct klsi_105_port_settings cfg;
361 unsigned long flags;
362
363 dbg("%s port %d", __FUNCTION__, port->number);
364
365 /* force low_latency on so that our tty_push actually forces
366 * the data through
367 * port->tty->low_latency = 1; */
368
369 /* Do a defined restart:
370 * Set up sane default baud rate and send the 'READ_ON'
371 * vendor command.
372 * FIXME: set modem line control (how?)
373 * Then read the modem line control and store values in
374 * priv->line_state.
375 */
376 cfg.pktlen = 5;
377 cfg.baudrate = kl5kusb105a_sio_b9600;
378 cfg.databits = kl5kusb105a_dtb_8;
379 cfg.unknown1 = 0;
380 cfg.unknown2 = 1;
381 klsi_105_chg_port_settings(port, &cfg);
382
383 /* set up termios structure */
384 spin_lock_irqsave (&priv->lock, flags);
385 priv->termios.c_iflag = port->tty->termios->c_iflag;
386 priv->termios.c_oflag = port->tty->termios->c_oflag;
387 priv->termios.c_cflag = port->tty->termios->c_cflag;
388 priv->termios.c_lflag = port->tty->termios->c_lflag;
389 for (i=0; i<NCCS; i++)
390 priv->termios.c_cc[i] = port->tty->termios->c_cc[i];
391 priv->cfg.pktlen = cfg.pktlen;
392 priv->cfg.baudrate = cfg.baudrate;
393 priv->cfg.databits = cfg.databits;
394 priv->cfg.unknown1 = cfg.unknown1;
395 priv->cfg.unknown2 = cfg.unknown2;
396 spin_unlock_irqrestore (&priv->lock, flags);
397
398 /* READ_ON and urb submission */
399 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
400 usb_rcvbulkpipe(port->serial->dev,
401 port->bulk_in_endpointAddress),
402 port->read_urb->transfer_buffer,
403 port->read_urb->transfer_buffer_length,
404 klsi_105_read_bulk_callback,
405 port);
406
407 rc = usb_submit_urb(port->read_urb, GFP_KERNEL);
408 if (rc) {
409 err("%s - failed submitting read urb, error %d", __FUNCTION__, rc);
410 retval = rc;
411 goto exit;
412 }
413
414 rc = usb_control_msg(port->serial->dev,
415 usb_sndctrlpipe(port->serial->dev,0),
416 KL5KUSB105A_SIO_CONFIGURE,
417 USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
418 KL5KUSB105A_SIO_CONFIGURE_READ_ON,
419 0, /* index */
420 NULL,
421 0,
422 KLSI_TIMEOUT);
423 if (rc < 0) {
424 err("Enabling read failed (error = %d)", rc);
425 retval = rc;
426 } else
427 dbg("%s - enabled reading", __FUNCTION__);
428
429 rc = klsi_105_get_line_state(port, &line_state);
430 if (rc >= 0) {
431 spin_lock_irqsave (&priv->lock, flags);
432 priv->line_state = line_state;
433 spin_unlock_irqrestore (&priv->lock, flags);
434 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state);
435 retval = 0;
436 } else
437 retval = rc;
438
439 exit:
440 return retval;
441 } /* klsi_105_open */
442
443
444 static void klsi_105_close (struct usb_serial_port *port, struct file *filp)
445 {
446 struct klsi_105_private *priv = usb_get_serial_port_data(port);
447 int rc;
448
449 dbg("%s port %d", __FUNCTION__, port->number);
450
451 /* send READ_OFF */
452 rc = usb_control_msg (port->serial->dev,
453 usb_sndctrlpipe(port->serial->dev, 0),
454 KL5KUSB105A_SIO_CONFIGURE,
455 USB_TYPE_VENDOR | USB_DIR_OUT,
456 KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
457 0, /* index */
458 NULL, 0,
459 KLSI_TIMEOUT);
460 if (rc < 0)
461 err("Disabling read failed (error = %d)", rc);
462
463 /* shutdown our bulk reads and writes */
464 usb_kill_urb(port->write_urb);
465 usb_kill_urb(port->read_urb);
466 /* unlink our write pool */
467 /* FIXME */
468 /* wgg - do I need this? I think so. */
469 usb_kill_urb(port->interrupt_in_urb);
470 info("kl5kusb105 port stats: %ld bytes in, %ld bytes out", priv->bytes_in, priv->bytes_out);
471 } /* klsi_105_close */
472
473
474 /* We need to write a complete 64-byte data block and encode the
475 * number actually sent in the first double-byte, LSB-order. That
476 * leaves at most 62 bytes of payload.
477 */
478 #define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */
479
480
481 static int klsi_105_write (struct usb_serial_port *port,
482 const unsigned char *buf, int count)
483 {
484 struct klsi_105_private *priv = usb_get_serial_port_data(port);
485 int result, size;
486 int bytes_sent=0;
487
488 dbg("%s - port %d", __FUNCTION__, port->number);
489
490 while (count > 0) {
491 /* try to find a free urb (write 0 bytes if none) */
492 struct urb *urb = NULL;
493 unsigned long flags;
494 int i;
495 /* since the pool is per-port we might not need the spin lock !? */
496 spin_lock_irqsave (&priv->lock, flags);
497 for (i=0; i<NUM_URBS; i++) {
498 if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
499 urb = priv->write_urb_pool[i];
500 dbg("%s - using pool URB %d", __FUNCTION__, i);
501 break;
502 }
503 }
504 spin_unlock_irqrestore (&priv->lock, flags);
505
506 if (urb==NULL) {
507 dbg("%s - no more free urbs", __FUNCTION__);
508 goto exit;
509 }
510
511 if (urb->transfer_buffer == NULL) {
512 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
513 if (urb->transfer_buffer == NULL) {
514 err("%s - no more kernel memory...", __FUNCTION__);
515 goto exit;
516 }
517 }
518
519 size = min (count, port->bulk_out_size - KLSI_105_DATA_OFFSET);
520 size = min (size, URB_TRANSFER_BUFFER_SIZE - KLSI_105_DATA_OFFSET);
521
522 memcpy (urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size);
523
524 /* write payload size into transfer buffer */
525 ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF);
526 ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8);
527
528 /* set up our urb */
529 usb_fill_bulk_urb(urb, port->serial->dev,
530 usb_sndbulkpipe(port->serial->dev,
531 port->bulk_out_endpointAddress),
532 urb->transfer_buffer,
533 URB_TRANSFER_BUFFER_SIZE,
534 klsi_105_write_bulk_callback,
535 port);
536
537 /* send the data out the bulk port */
538 result = usb_submit_urb(urb, GFP_ATOMIC);
539 if (result) {
540 err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
541 goto exit;
542 }
543 buf += size;
544 bytes_sent += size;
545 count -= size;
546 }
547 exit:
548 /* lockless, but it's for debug info only... */
549 priv->bytes_out+=bytes_sent;
550
551 return bytes_sent; /* that's how much we wrote */
552 } /* klsi_105_write */
553
554 static void klsi_105_write_bulk_callback ( struct urb *urb)
555 {
556 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
557
558 dbg("%s - port %d", __FUNCTION__, port->number);
559
560 if (urb->status) {
561 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__,
562 urb->status);
563 return;
564 }
565
566 usb_serial_port_softint(port);
567 } /* klsi_105_write_bulk_completion_callback */
568
569
570 /* return number of characters currently in the writing process */
571 static int klsi_105_chars_in_buffer (struct usb_serial_port *port)
572 {
573 int chars = 0;
574 int i;
575 unsigned long flags;
576 struct klsi_105_private *priv = usb_get_serial_port_data(port);
577
578 spin_lock_irqsave (&priv->lock, flags);
579
580 for (i = 0; i < NUM_URBS; ++i) {
581 if (priv->write_urb_pool[i]->status == -EINPROGRESS) {
582 chars += URB_TRANSFER_BUFFER_SIZE;
583 }
584 }
585
586 spin_unlock_irqrestore (&priv->lock, flags);
587
588 dbg("%s - returns %d", __FUNCTION__, chars);
589 return (chars);
590 }
591
592 static int klsi_105_write_room (struct usb_serial_port *port)
593 {
594 unsigned long flags;
595 int i;
596 int room = 0;
597 struct klsi_105_private *priv = usb_get_serial_port_data(port);
598
599 spin_lock_irqsave (&priv->lock, flags);
600 for (i = 0; i < NUM_URBS; ++i) {
601 if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
602 room += URB_TRANSFER_BUFFER_SIZE;
603 }
604 }
605
606 spin_unlock_irqrestore (&priv->lock, flags);
607
608 dbg("%s - returns %d", __FUNCTION__, room);
609 return (room);
610 }
611
612
613
614 static void klsi_105_read_bulk_callback (struct urb *urb)
615 {
616 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
617 struct klsi_105_private *priv = usb_get_serial_port_data(port);
618 struct tty_struct *tty;
619 unsigned char *data = urb->transfer_buffer;
620 int rc;
621
622 dbg("%s - port %d", __FUNCTION__, port->number);
623
624 /* The urb might have been killed. */
625 if (urb->status) {
626 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__,
627 urb->status);
628 return;
629 }
630
631 /* The data received is again preceded by a length double-byte in LSB-
632 * first order (see klsi_105_write() )
633 */
634 if (urb->actual_length == 0) {
635 /* empty urbs seem to happen, we ignore them */
636 /* dbg("%s - emtpy URB", __FUNCTION__); */
637 ;
638 } else if (urb->actual_length <= 2) {
639 dbg("%s - size %d URB not understood", __FUNCTION__,
640 urb->actual_length);
641 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
642 urb->actual_length, data);
643 } else {
644 int bytes_sent = ((__u8 *) data)[0] +
645 ((unsigned int) ((__u8 *) data)[1] << 8);
646 tty = port->tty;
647 /* we should immediately resubmit the URB, before attempting
648 * to pass the data on to the tty layer. But that needs locking
649 * against re-entry an then mixed-up data because of
650 * intermixed tty_flip_buffer_push()s
651 * FIXME
652 */
653 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
654 urb->actual_length, data);
655
656 if (bytes_sent + 2 > urb->actual_length) {
657 dbg("%s - trying to read more data than available"
658 " (%d vs. %d)", __FUNCTION__,
659 bytes_sent+2, urb->actual_length);
660 /* cap at implied limit */
661 bytes_sent = urb->actual_length - 2;
662 }
663
664 tty_buffer_request_room(tty, bytes_sent);
665 tty_insert_flip_string(tty, data + 2, bytes_sent);
666 tty_flip_buffer_push(tty);
667
668 /* again lockless, but debug info only */
669 priv->bytes_in += bytes_sent;
670 }
671 /* Continue trying to always read */
672 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
673 usb_rcvbulkpipe(port->serial->dev,
674 port->bulk_in_endpointAddress),
675 port->read_urb->transfer_buffer,
676 port->read_urb->transfer_buffer_length,
677 klsi_105_read_bulk_callback,
678 port);
679 rc = usb_submit_urb(port->read_urb, GFP_ATOMIC);
680 if (rc)
681 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, rc);
682 } /* klsi_105_read_bulk_callback */
683
684
685 static void klsi_105_set_termios (struct usb_serial_port *port,
686 struct ktermios *old_termios)
687 {
688 struct klsi_105_private *priv = usb_get_serial_port_data(port);
689 unsigned int iflag = port->tty->termios->c_iflag;
690 unsigned int old_iflag = old_termios->c_iflag;
691 unsigned int cflag = port->tty->termios->c_cflag;
692 unsigned int old_cflag = old_termios->c_cflag;
693 struct klsi_105_port_settings cfg;
694 unsigned long flags;
695
696 /* lock while we are modifying the settings */
697 spin_lock_irqsave (&priv->lock, flags);
698
699 /*
700 * Update baud rate
701 */
702 if( (cflag & CBAUD) != (old_cflag & CBAUD) ) {
703 /* reassert DTR and (maybe) RTS on transition from B0 */
704 if( (old_cflag & CBAUD) == B0 ) {
705 dbg("%s: baud was B0", __FUNCTION__);
706 #if 0
707 priv->control_state |= TIOCM_DTR;
708 /* don't set RTS if using hardware flow control */
709 if (!(old_cflag & CRTSCTS)) {
710 priv->control_state |= TIOCM_RTS;
711 }
712 mct_u232_set_modem_ctrl(serial, priv->control_state);
713 #endif
714 }
715
716 switch(cflag & CBAUD) {
717 case B0: /* handled below */
718 break;
719 case B1200: priv->cfg.baudrate = kl5kusb105a_sio_b1200;
720 break;
721 case B2400: priv->cfg.baudrate = kl5kusb105a_sio_b2400;
722 break;
723 case B4800: priv->cfg.baudrate = kl5kusb105a_sio_b4800;
724 break;
725 case B9600: priv->cfg.baudrate = kl5kusb105a_sio_b9600;
726 break;
727 case B19200: priv->cfg.baudrate = kl5kusb105a_sio_b19200;
728 break;
729 case B38400: priv->cfg.baudrate = kl5kusb105a_sio_b38400;
730 break;
731 case B57600: priv->cfg.baudrate = kl5kusb105a_sio_b57600;
732 break;
733 case B115200: priv->cfg.baudrate = kl5kusb105a_sio_b115200;
734 break;
735 default:
736 err("KLSI USB->Serial converter:"
737 " unsupported baudrate request, using default"
738 " of 9600");
739 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
740 break;
741 }
742 if ((cflag & CBAUD) == B0 ) {
743 dbg("%s: baud is B0", __FUNCTION__);
744 /* Drop RTS and DTR */
745 /* maybe this should be simulated by sending read
746 * disable and read enable messages?
747 */
748 ;
749 #if 0
750 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
751 mct_u232_set_modem_ctrl(serial, priv->control_state);
752 #endif
753 }
754 }
755
756 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
757 /* set the number of data bits */
758 switch (cflag & CSIZE) {
759 case CS5:
760 dbg("%s - 5 bits/byte not supported", __FUNCTION__);
761 spin_unlock_irqrestore (&priv->lock, flags);
762 return ;
763 case CS6:
764 dbg("%s - 6 bits/byte not supported", __FUNCTION__);
765 spin_unlock_irqrestore (&priv->lock, flags);
766 return ;
767 case CS7:
768 priv->cfg.databits = kl5kusb105a_dtb_7;
769 break;
770 case CS8:
771 priv->cfg.databits = kl5kusb105a_dtb_8;
772 break;
773 default:
774 err("CSIZE was not CS5-CS8, using default of 8");
775 priv->cfg.databits = kl5kusb105a_dtb_8;
776 break;
777 }
778 }
779
780 /*
781 * Update line control register (LCR)
782 */
783 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
784 || (cflag & CSTOPB) != (old_cflag & CSTOPB) ) {
785
786 #if 0
787 priv->last_lcr = 0;
788
789 /* set the parity */
790 if (cflag & PARENB)
791 priv->last_lcr |= (cflag & PARODD) ?
792 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
793 else
794 priv->last_lcr |= MCT_U232_PARITY_NONE;
795
796 /* set the number of stop bits */
797 priv->last_lcr |= (cflag & CSTOPB) ?
798 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
799
800 mct_u232_set_line_ctrl(serial, priv->last_lcr);
801 #endif
802 ;
803 }
804
805 /*
806 * Set flow control: well, I do not really now how to handle DTR/RTS.
807 * Just do what we have seen with SniffUSB on Win98.
808 */
809 if( (iflag & IXOFF) != (old_iflag & IXOFF)
810 || (iflag & IXON) != (old_iflag & IXON)
811 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS) ) {
812
813 /* Drop DTR/RTS if no flow control otherwise assert */
814 #if 0
815 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS) )
816 priv->control_state |= TIOCM_DTR | TIOCM_RTS;
817 else
818 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
819 mct_u232_set_modem_ctrl(serial, priv->control_state);
820 #endif
821 ;
822 }
823 memcpy (&cfg, &priv->cfg, sizeof(cfg));
824 spin_unlock_irqrestore (&priv->lock, flags);
825
826 /* now commit changes to device */
827 klsi_105_chg_port_settings(port, &cfg);
828 } /* klsi_105_set_termios */
829
830
831 #if 0
832 static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state )
833 {
834 struct usb_serial *serial = port->serial;
835 struct mct_u232_private *priv = (struct mct_u232_private *)port->private;
836 unsigned char lcr = priv->last_lcr;
837
838 dbg("%sstate=%d", __FUNCTION__, break_state);
839
840 if (break_state)
841 lcr |= MCT_U232_SET_BREAK;
842
843 mct_u232_set_line_ctrl(serial, lcr);
844 } /* mct_u232_break_ctl */
845 #endif
846
847 static int klsi_105_tiocmget (struct usb_serial_port *port, struct file *file)
848 {
849 struct klsi_105_private *priv = usb_get_serial_port_data(port);
850 unsigned long flags;
851 int rc;
852 unsigned long line_state;
853 dbg("%s - request, just guessing", __FUNCTION__);
854
855 rc = klsi_105_get_line_state(port, &line_state);
856 if (rc < 0) {
857 err("Reading line control failed (error = %d)", rc);
858 /* better return value? EAGAIN? */
859 return rc;
860 }
861
862 spin_lock_irqsave (&priv->lock, flags);
863 priv->line_state = line_state;
864 spin_unlock_irqrestore (&priv->lock, flags);
865 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state);
866 return (int)line_state;
867 }
868
869 static int klsi_105_tiocmset (struct usb_serial_port *port, struct file *file,
870 unsigned int set, unsigned int clear)
871 {
872 int retval = -EINVAL;
873
874 dbg("%s", __FUNCTION__);
875
876 /* if this ever gets implemented, it should be done something like this:
877 struct usb_serial *serial = port->serial;
878 struct klsi_105_private *priv = usb_get_serial_port_data(port);
879 unsigned long flags;
880 int control;
881
882 spin_lock_irqsave (&priv->lock, flags);
883 if (set & TIOCM_RTS)
884 priv->control_state |= TIOCM_RTS;
885 if (set & TIOCM_DTR)
886 priv->control_state |= TIOCM_DTR;
887 if (clear & TIOCM_RTS)
888 priv->control_state &= ~TIOCM_RTS;
889 if (clear & TIOCM_DTR)
890 priv->control_state &= ~TIOCM_DTR;
891 control = priv->control_state;
892 spin_unlock_irqrestore (&priv->lock, flags);
893 retval = mct_u232_set_modem_ctrl(serial, control);
894 */
895 return retval;
896 }
897
898 static void klsi_105_throttle (struct usb_serial_port *port)
899 {
900 dbg("%s - port %d", __FUNCTION__, port->number);
901 usb_kill_urb(port->read_urb);
902 }
903
904 static void klsi_105_unthrottle (struct usb_serial_port *port)
905 {
906 int result;
907
908 dbg("%s - port %d", __FUNCTION__, port->number);
909
910 port->read_urb->dev = port->serial->dev;
911 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
912 if (result)
913 err("%s - failed submitting read urb, error %d", __FUNCTION__,
914 result);
915 }
916
917
918
919 static int __init klsi_105_init (void)
920 {
921 int retval;
922 retval = usb_serial_register(&kl5kusb105d_device);
923 if (retval)
924 goto failed_usb_serial_register;
925 retval = usb_register(&kl5kusb105d_driver);
926 if (retval)
927 goto failed_usb_register;
928
929 info(DRIVER_DESC " " DRIVER_VERSION);
930 return 0;
931 failed_usb_register:
932 usb_serial_deregister(&kl5kusb105d_device);
933 failed_usb_serial_register:
934 return retval;
935 }
936
937
938 static void __exit klsi_105_exit (void)
939 {
940 usb_deregister (&kl5kusb105d_driver);
941 usb_serial_deregister (&kl5kusb105d_device);
942 }
943
944
945 module_init (klsi_105_init);
946 module_exit (klsi_105_exit);
947
948 MODULE_AUTHOR( DRIVER_AUTHOR );
949 MODULE_DESCRIPTION( DRIVER_DESC );
950 MODULE_LICENSE("GPL");
951
952
953 module_param(debug, bool, S_IRUGO | S_IWUSR);
954 MODULE_PARM_DESC(debug, "enable extensive debugging messages");
955
956 /* vim: set sts=8 ts=8 sw=8: */
Linux kernel - Deliverables
This page took 0.069424 seconds and 6 git commands to generate.