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Merge branch 'x86-mrst-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/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 do 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_disconnect(struct usb_serial *serial);
77 static void klsi_105_release(struct usb_serial *serial);
78 static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port);
79 static void klsi_105_close(struct usb_serial_port *port);
80 static int klsi_105_write(struct tty_struct *tty,
81 struct usb_serial_port *port, const unsigned char *buf, int count);
82 static void klsi_105_write_bulk_callback(struct urb *urb);
83 static int klsi_105_chars_in_buffer(struct tty_struct *tty);
84 static int klsi_105_write_room(struct tty_struct *tty);
85 static void klsi_105_read_bulk_callback(struct urb *urb);
86 static void klsi_105_set_termios(struct tty_struct *tty,
87 struct usb_serial_port *port, struct ktermios *old);
88 static void klsi_105_throttle(struct tty_struct *tty);
89 static void klsi_105_unthrottle(struct tty_struct *tty);
90 static int klsi_105_tiocmget(struct tty_struct *tty, struct file *file);
91 static int klsi_105_tiocmset(struct tty_struct *tty, struct file *file,
92 unsigned int set, unsigned int clear);
93
94 /*
95 * All of the device info needed for the KLSI converters.
96 */
97 static const struct usb_device_id id_table[] = {
98 { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) },
99 { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) },
100 { } /* Terminating entry */
101 };
102
103 MODULE_DEVICE_TABLE(usb, id_table);
104
105 static struct usb_driver kl5kusb105d_driver = {
106 .name = "kl5kusb105d",
107 .probe = usb_serial_probe,
108 .disconnect = usb_serial_disconnect,
109 .id_table = id_table,
110 .no_dynamic_id = 1,
111 };
112
113 static struct usb_serial_driver kl5kusb105d_device = {
114 .driver = {
115 .owner = THIS_MODULE,
116 .name = "kl5kusb105d",
117 },
118 .description = "KL5KUSB105D / PalmConnect",
119 .usb_driver = &kl5kusb105d_driver,
120 .id_table = id_table,
121 .num_ports = 1,
122 .open = klsi_105_open,
123 .close = klsi_105_close,
124 .write = klsi_105_write,
125 .write_bulk_callback = klsi_105_write_bulk_callback,
126 .chars_in_buffer = klsi_105_chars_in_buffer,
127 .write_room = klsi_105_write_room,
128 .read_bulk_callback = klsi_105_read_bulk_callback,
129 .set_termios = klsi_105_set_termios,
130 /*.break_ctl = klsi_105_break_ctl,*/
131 .tiocmget = klsi_105_tiocmget,
132 .tiocmset = klsi_105_tiocmset,
133 .attach = klsi_105_startup,
134 .disconnect = klsi_105_disconnect,
135 .release = klsi_105_release,
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 dev_err(&port->dev,
186 "Change port settings failed (error = %d)\n", rc);
187 dev_info(&port->serial->dev->dev,
188 "%d byte block, baudrate %x, databits %d, u1 %d, u2 %d\n",
189 settings->pktlen, 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;
216 __u16 status;
217
218 dev_info(&port->serial->dev->dev, "sending SIO Poll request\n");
219
220 status_buf = kmalloc(KLSI_STATUSBUF_LEN, GFP_KERNEL);
221 if (!status_buf) {
222 dev_err(&port->dev, "%s - out of memory for status buffer.\n",
223 __func__);
224 return -ENOMEM;
225 }
226 status_buf[0] = 0xff;
227 status_buf[1] = 0xff;
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 dev_err(&port->dev, "Reading line status failed (error = %d)\n",
239 rc);
240 else {
241 status = get_unaligned_le16(status_buf);
242
243 dev_info(&port->serial->dev->dev, "read status %x %x",
244 status_buf[0], status_buf[1]);
245
246 *line_state_p = klsi_105_status2linestate(status);
247 }
248
249 kfree(status_buf);
250 return rc;
251 }
252
253
254 /*
255 * Driver's tty interface functions
256 */
257
258 static int klsi_105_startup(struct usb_serial *serial)
259 {
260 struct klsi_105_private *priv;
261 int i, j;
262
263 /* check if we support the product id (see keyspan.c)
264 * FIXME
265 */
266
267 /* allocate the private data structure */
268 for (i = 0; i < serial->num_ports; i++) {
269 priv = kmalloc(sizeof(struct klsi_105_private),
270 GFP_KERNEL);
271 if (!priv) {
272 dbg("%skmalloc for klsi_105_private failed.", __func__);
273 i--;
274 goto err_cleanup;
275 }
276 /* set initial values for control structures */
277 priv->cfg.pktlen = 5;
278 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
279 priv->cfg.databits = kl5kusb105a_dtb_8;
280 priv->cfg.unknown1 = 0;
281 priv->cfg.unknown2 = 1;
282
283 priv->line_state = 0;
284
285 priv->bytes_in = 0;
286 priv->bytes_out = 0;
287 usb_set_serial_port_data(serial->port[i], priv);
288
289 spin_lock_init(&priv->lock);
290 for (j = 0; j < NUM_URBS; j++) {
291 struct urb *urb = usb_alloc_urb(0, GFP_KERNEL);
292
293 priv->write_urb_pool[j] = urb;
294 if (urb == NULL) {
295 dev_err(&serial->dev->dev, "No more urbs???\n");
296 goto err_cleanup;
297 }
298
299 urb->transfer_buffer =
300 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
301 if (!urb->transfer_buffer) {
302 dev_err(&serial->dev->dev,
303 "%s - out of memory for urb buffers.\n",
304 __func__);
305 goto err_cleanup;
306 }
307 }
308
309 /* priv->termios is left uninitalized until port opening */
310 init_waitqueue_head(&serial->port[i]->write_wait);
311 }
312
313 return 0;
314
315 err_cleanup:
316 for (; i >= 0; i--) {
317 priv = usb_get_serial_port_data(serial->port[i]);
318 for (j = 0; j < NUM_URBS; j++) {
319 if (priv->write_urb_pool[j]) {
320 kfree(priv->write_urb_pool[j]->transfer_buffer);
321 usb_free_urb(priv->write_urb_pool[j]);
322 }
323 }
324 usb_set_serial_port_data(serial->port[i], NULL);
325 }
326 return -ENOMEM;
327 } /* klsi_105_startup */
328
329
330 static void klsi_105_disconnect(struct usb_serial *serial)
331 {
332 int i;
333
334 dbg("%s", __func__);
335
336 /* stop reads and writes on all ports */
337 for (i = 0; i < serial->num_ports; ++i) {
338 struct klsi_105_private *priv =
339 usb_get_serial_port_data(serial->port[i]);
340
341 if (priv) {
342 /* kill our write urb pool */
343 int j;
344 struct urb **write_urbs = priv->write_urb_pool;
345
346 for (j = 0; j < NUM_URBS; j++) {
347 if (write_urbs[j]) {
348 usb_kill_urb(write_urbs[j]);
349 usb_free_urb(write_urbs[j]);
350 }
351 }
352 }
353 }
354 } /* klsi_105_disconnect */
355
356
357 static void klsi_105_release(struct usb_serial *serial)
358 {
359 int i;
360
361 dbg("%s", __func__);
362
363 for (i = 0; i < serial->num_ports; ++i) {
364 struct klsi_105_private *priv =
365 usb_get_serial_port_data(serial->port[i]);
366
367 kfree(priv);
368 }
369 } /* klsi_105_release */
370
371 static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port)
372 {
373 struct klsi_105_private *priv = usb_get_serial_port_data(port);
374 int retval = 0;
375 int rc;
376 int i;
377 unsigned long line_state;
378 struct klsi_105_port_settings *cfg;
379 unsigned long flags;
380
381 dbg("%s port %d", __func__, port->number);
382
383 /* Do a defined restart:
384 * Set up sane default baud rate and send the 'READ_ON'
385 * vendor command.
386 * FIXME: set modem line control (how?)
387 * Then read the modem line control and store values in
388 * priv->line_state.
389 */
390 cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
391 if (!cfg) {
392 dev_err(&port->dev, "%s - out of memory for config buffer.\n",
393 __func__);
394 return -ENOMEM;
395 }
396 cfg->pktlen = 5;
397 cfg->baudrate = kl5kusb105a_sio_b9600;
398 cfg->databits = kl5kusb105a_dtb_8;
399 cfg->unknown1 = 0;
400 cfg->unknown2 = 1;
401 klsi_105_chg_port_settings(port, cfg);
402
403 /* set up termios structure */
404 spin_lock_irqsave(&priv->lock, flags);
405 priv->termios.c_iflag = tty->termios->c_iflag;
406 priv->termios.c_oflag = tty->termios->c_oflag;
407 priv->termios.c_cflag = tty->termios->c_cflag;
408 priv->termios.c_lflag = tty->termios->c_lflag;
409 for (i = 0; i < NCCS; i++)
410 priv->termios.c_cc[i] = tty->termios->c_cc[i];
411 priv->cfg.pktlen = cfg->pktlen;
412 priv->cfg.baudrate = cfg->baudrate;
413 priv->cfg.databits = cfg->databits;
414 priv->cfg.unknown1 = cfg->unknown1;
415 priv->cfg.unknown2 = cfg->unknown2;
416 spin_unlock_irqrestore(&priv->lock, flags);
417
418 /* READ_ON and urb submission */
419 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
420 usb_rcvbulkpipe(port->serial->dev,
421 port->bulk_in_endpointAddress),
422 port->read_urb->transfer_buffer,
423 port->read_urb->transfer_buffer_length,
424 klsi_105_read_bulk_callback,
425 port);
426
427 rc = usb_submit_urb(port->read_urb, GFP_KERNEL);
428 if (rc) {
429 dev_err(&port->dev, "%s - failed submitting read urb, "
430 "error %d\n", __func__, rc);
431 retval = rc;
432 goto exit;
433 }
434
435 rc = usb_control_msg(port->serial->dev,
436 usb_sndctrlpipe(port->serial->dev, 0),
437 KL5KUSB105A_SIO_CONFIGURE,
438 USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
439 KL5KUSB105A_SIO_CONFIGURE_READ_ON,
440 0, /* index */
441 NULL,
442 0,
443 KLSI_TIMEOUT);
444 if (rc < 0) {
445 dev_err(&port->dev, "Enabling read failed (error = %d)\n", rc);
446 retval = rc;
447 } else
448 dbg("%s - enabled reading", __func__);
449
450 rc = klsi_105_get_line_state(port, &line_state);
451 if (rc >= 0) {
452 spin_lock_irqsave(&priv->lock, flags);
453 priv->line_state = line_state;
454 spin_unlock_irqrestore(&priv->lock, flags);
455 dbg("%s - read line state 0x%lx", __func__, line_state);
456 retval = 0;
457 } else
458 retval = rc;
459
460 exit:
461 kfree(cfg);
462 return retval;
463 } /* klsi_105_open */
464
465
466 static void klsi_105_close(struct usb_serial_port *port)
467 {
468 struct klsi_105_private *priv = usb_get_serial_port_data(port);
469 int rc;
470
471 dbg("%s port %d", __func__, port->number);
472
473 mutex_lock(&port->serial->disc_mutex);
474 if (!port->serial->disconnected) {
475 /* send READ_OFF */
476 rc = usb_control_msg(port->serial->dev,
477 usb_sndctrlpipe(port->serial->dev, 0),
478 KL5KUSB105A_SIO_CONFIGURE,
479 USB_TYPE_VENDOR | USB_DIR_OUT,
480 KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
481 0, /* index */
482 NULL, 0,
483 KLSI_TIMEOUT);
484 if (rc < 0)
485 dev_err(&port->dev,
486 "Disabling read failed (error = %d)\n", rc);
487 }
488 mutex_unlock(&port->serial->disc_mutex);
489
490 /* shutdown our bulk reads and writes */
491 usb_kill_urb(port->write_urb);
492 usb_kill_urb(port->read_urb);
493 /* unlink our write pool */
494 /* FIXME */
495 /* wgg - do I need this? I think so. */
496 usb_kill_urb(port->interrupt_in_urb);
497 dev_info(&port->serial->dev->dev,
498 "port stats: %ld bytes in, %ld bytes out\n",
499 priv->bytes_in, priv->bytes_out);
500 } /* klsi_105_close */
501
502
503 /* We need to write a complete 64-byte data block and encode the
504 * number actually sent in the first double-byte, LSB-order. That
505 * leaves at most 62 bytes of payload.
506 */
507 #define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */
508
509
510 static int klsi_105_write(struct tty_struct *tty,
511 struct usb_serial_port *port, const unsigned char *buf, int count)
512 {
513 struct klsi_105_private *priv = usb_get_serial_port_data(port);
514 int result, size;
515 int bytes_sent = 0;
516
517 dbg("%s - port %d", __func__, port->number);
518
519 while (count > 0) {
520 /* try to find a free urb (write 0 bytes if none) */
521 struct urb *urb = NULL;
522 unsigned long flags;
523 int i;
524 /* since the pool is per-port we might not need
525 the spin lock !? */
526 spin_lock_irqsave(&priv->lock, flags);
527 for (i = 0; i < NUM_URBS; i++) {
528 if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
529 urb = priv->write_urb_pool[i];
530 dbg("%s - using pool URB %d", __func__, i);
531 break;
532 }
533 }
534 spin_unlock_irqrestore(&priv->lock, flags);
535
536 if (urb == NULL) {
537 dbg("%s - no more free urbs", __func__);
538 goto exit;
539 }
540
541 if (urb->transfer_buffer == NULL) {
542 urb->transfer_buffer =
543 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
544 if (urb->transfer_buffer == NULL) {
545 dev_err(&port->dev,
546 "%s - no more kernel memory...\n",
547 __func__);
548 goto exit;
549 }
550 }
551
552 size = min(count, port->bulk_out_size - KLSI_105_DATA_OFFSET);
553 size = min(size, URB_TRANSFER_BUFFER_SIZE -
554 KLSI_105_DATA_OFFSET);
555
556 memcpy(urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size);
557
558 /* write payload size into transfer buffer */
559 ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF);
560 ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8);
561
562 /* set up our urb */
563 usb_fill_bulk_urb(urb, port->serial->dev,
564 usb_sndbulkpipe(port->serial->dev,
565 port->bulk_out_endpointAddress),
566 urb->transfer_buffer,
567 URB_TRANSFER_BUFFER_SIZE,
568 klsi_105_write_bulk_callback,
569 port);
570
571 /* send the data out the bulk port */
572 result = usb_submit_urb(urb, GFP_ATOMIC);
573 if (result) {
574 dev_err(&port->dev,
575 "%s - failed submitting write urb, error %d\n",
576 __func__, result);
577 goto exit;
578 }
579 buf += size;
580 bytes_sent += size;
581 count -= size;
582 }
583 exit:
584 /* lockless, but it's for debug info only... */
585 priv->bytes_out += bytes_sent;
586
587 return bytes_sent; /* that's how much we wrote */
588 } /* klsi_105_write */
589
590 static void klsi_105_write_bulk_callback(struct urb *urb)
591 {
592 struct usb_serial_port *port = urb->context;
593 int status = urb->status;
594
595 dbg("%s - port %d", __func__, port->number);
596
597 if (status) {
598 dbg("%s - nonzero write bulk status received: %d", __func__,
599 status);
600 return;
601 }
602
603 usb_serial_port_softint(port);
604 } /* klsi_105_write_bulk_completion_callback */
605
606
607 /* return number of characters currently in the writing process */
608 static int klsi_105_chars_in_buffer(struct tty_struct *tty)
609 {
610 struct usb_serial_port *port = tty->driver_data;
611 int chars = 0;
612 int i;
613 unsigned long flags;
614 struct klsi_105_private *priv = usb_get_serial_port_data(port);
615
616 spin_lock_irqsave(&priv->lock, flags);
617
618 for (i = 0; i < NUM_URBS; ++i) {
619 if (priv->write_urb_pool[i]->status == -EINPROGRESS)
620 chars += URB_TRANSFER_BUFFER_SIZE;
621 }
622
623 spin_unlock_irqrestore(&priv->lock, flags);
624
625 dbg("%s - returns %d", __func__, chars);
626 return chars;
627 }
628
629 static int klsi_105_write_room(struct tty_struct *tty)
630 {
631 struct usb_serial_port *port = tty->driver_data;
632 unsigned long flags;
633 int i;
634 int room = 0;
635 struct klsi_105_private *priv = usb_get_serial_port_data(port);
636
637 spin_lock_irqsave(&priv->lock, flags);
638 for (i = 0; i < NUM_URBS; ++i) {
639 if (priv->write_urb_pool[i]->status != -EINPROGRESS)
640 room += URB_TRANSFER_BUFFER_SIZE;
641 }
642
643 spin_unlock_irqrestore(&priv->lock, flags);
644
645 dbg("%s - returns %d", __func__, room);
646 return room;
647 }
648
649
650
651 static void klsi_105_read_bulk_callback(struct urb *urb)
652 {
653 struct usb_serial_port *port = urb->context;
654 struct klsi_105_private *priv = usb_get_serial_port_data(port);
655 struct tty_struct *tty;
656 unsigned char *data = urb->transfer_buffer;
657 int rc;
658 int status = urb->status;
659
660 dbg("%s - port %d", __func__, port->number);
661
662 /* The urb might have been killed. */
663 if (status) {
664 dbg("%s - nonzero read bulk status received: %d", __func__,
665 status);
666 return;
667 }
668
669 /* The data received is again preceded by a length double-byte in LSB-
670 * first order (see klsi_105_write() )
671 */
672 if (urb->actual_length == 0) {
673 /* empty urbs seem to happen, we ignore them */
674 /* dbg("%s - emtpy URB", __func__); */
675 ;
676 } else if (urb->actual_length <= 2) {
677 dbg("%s - size %d URB not understood", __func__,
678 urb->actual_length);
679 usb_serial_debug_data(debug, &port->dev, __func__,
680 urb->actual_length, data);
681 } else {
682 int bytes_sent = ((__u8 *) data)[0] +
683 ((unsigned int) ((__u8 *) data)[1] << 8);
684 tty = tty_port_tty_get(&port->port);
685 /* we should immediately resubmit the URB, before attempting
686 * to pass the data on to the tty layer. But that needs locking
687 * against re-entry an then mixed-up data because of
688 * intermixed tty_flip_buffer_push()s
689 * FIXME
690 */
691 usb_serial_debug_data(debug, &port->dev, __func__,
692 urb->actual_length, data);
693
694 if (bytes_sent + 2 > urb->actual_length) {
695 dbg("%s - trying to read more data than available"
696 " (%d vs. %d)", __func__,
697 bytes_sent+2, urb->actual_length);
698 /* cap at implied limit */
699 bytes_sent = urb->actual_length - 2;
700 }
701
702 tty_insert_flip_string(tty, data + 2, bytes_sent);
703 tty_flip_buffer_push(tty);
704 tty_kref_put(tty);
705
706 /* again lockless, but debug info only */
707 priv->bytes_in += bytes_sent;
708 }
709 /* Continue trying to always read */
710 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
711 usb_rcvbulkpipe(port->serial->dev,
712 port->bulk_in_endpointAddress),
713 port->read_urb->transfer_buffer,
714 port->read_urb->transfer_buffer_length,
715 klsi_105_read_bulk_callback,
716 port);
717 rc = usb_submit_urb(port->read_urb, GFP_ATOMIC);
718 if (rc)
719 dev_err(&port->dev,
720 "%s - failed resubmitting read urb, error %d\n",
721 __func__, rc);
722 } /* klsi_105_read_bulk_callback */
723
724
725 static void klsi_105_set_termios(struct tty_struct *tty,
726 struct usb_serial_port *port,
727 struct ktermios *old_termios)
728 {
729 struct klsi_105_private *priv = usb_get_serial_port_data(port);
730 unsigned int iflag = tty->termios->c_iflag;
731 unsigned int old_iflag = old_termios->c_iflag;
732 unsigned int cflag = tty->termios->c_cflag;
733 unsigned int old_cflag = old_termios->c_cflag;
734 struct klsi_105_port_settings *cfg;
735 unsigned long flags;
736 speed_t baud;
737
738 cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
739 if (!cfg) {
740 dev_err(&port->dev, "%s - out of memory for config buffer.\n",
741 __func__);
742 return;
743 }
744
745 /* lock while we are modifying the settings */
746 spin_lock_irqsave(&priv->lock, flags);
747
748 /*
749 * Update baud rate
750 */
751 baud = tty_get_baud_rate(tty);
752
753 if ((cflag & CBAUD) != (old_cflag & CBAUD)) {
754 /* reassert DTR and (maybe) RTS on transition from B0 */
755 if ((old_cflag & CBAUD) == B0) {
756 dbg("%s: baud was B0", __func__);
757 #if 0
758 priv->control_state |= TIOCM_DTR;
759 /* don't set RTS if using hardware flow control */
760 if (!(old_cflag & CRTSCTS))
761 priv->control_state |= TIOCM_RTS;
762 mct_u232_set_modem_ctrl(serial, priv->control_state);
763 #endif
764 }
765 }
766 switch (baud) {
767 case 0: /* handled below */
768 break;
769 case 1200:
770 priv->cfg.baudrate = kl5kusb105a_sio_b1200;
771 break;
772 case 2400:
773 priv->cfg.baudrate = kl5kusb105a_sio_b2400;
774 break;
775 case 4800:
776 priv->cfg.baudrate = kl5kusb105a_sio_b4800;
777 break;
778 case 9600:
779 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
780 break;
781 case 19200:
782 priv->cfg.baudrate = kl5kusb105a_sio_b19200;
783 break;
784 case 38400:
785 priv->cfg.baudrate = kl5kusb105a_sio_b38400;
786 break;
787 case 57600:
788 priv->cfg.baudrate = kl5kusb105a_sio_b57600;
789 break;
790 case 115200:
791 priv->cfg.baudrate = kl5kusb105a_sio_b115200;
792 break;
793 default:
794 dbg("KLSI USB->Serial converter:"
795 " unsupported baudrate request, using default of 9600");
796 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
797 baud = 9600;
798 break;
799 }
800 if ((cflag & CBAUD) == B0) {
801 dbg("%s: baud is B0", __func__);
802 /* Drop RTS and DTR */
803 /* maybe this should be simulated by sending read
804 * disable and read enable messages?
805 */
806 ;
807 #if 0
808 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
809 mct_u232_set_modem_ctrl(serial, priv->control_state);
810 #endif
811 }
812 tty_encode_baud_rate(tty, baud, baud);
813
814 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
815 /* set the number of data bits */
816 switch (cflag & CSIZE) {
817 case CS5:
818 dbg("%s - 5 bits/byte not supported", __func__);
819 spin_unlock_irqrestore(&priv->lock, flags);
820 goto err;
821 case CS6:
822 dbg("%s - 6 bits/byte not supported", __func__);
823 spin_unlock_irqrestore(&priv->lock, flags);
824 goto err;
825 case CS7:
826 priv->cfg.databits = kl5kusb105a_dtb_7;
827 break;
828 case CS8:
829 priv->cfg.databits = kl5kusb105a_dtb_8;
830 break;
831 default:
832 dev_err(&port->dev,
833 "CSIZE was not CS5-CS8, using default of 8\n");
834 priv->cfg.databits = kl5kusb105a_dtb_8;
835 break;
836 }
837 }
838
839 /*
840 * Update line control register (LCR)
841 */
842 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
843 || (cflag & CSTOPB) != (old_cflag & CSTOPB)) {
844 /* Not currently supported */
845 tty->termios->c_cflag &= ~(PARENB|PARODD|CSTOPB);
846 #if 0
847 priv->last_lcr = 0;
848
849 /* set the parity */
850 if (cflag & PARENB)
851 priv->last_lcr |= (cflag & PARODD) ?
852 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
853 else
854 priv->last_lcr |= MCT_U232_PARITY_NONE;
855
856 /* set the number of stop bits */
857 priv->last_lcr |= (cflag & CSTOPB) ?
858 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
859
860 mct_u232_set_line_ctrl(serial, priv->last_lcr);
861 #endif
862 ;
863 }
864 /*
865 * Set flow control: well, I do not really now how to handle DTR/RTS.
866 * Just do what we have seen with SniffUSB on Win98.
867 */
868 if ((iflag & IXOFF) != (old_iflag & IXOFF)
869 || (iflag & IXON) != (old_iflag & IXON)
870 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
871 /* Not currently supported */
872 tty->termios->c_cflag &= ~CRTSCTS;
873 /* Drop DTR/RTS if no flow control otherwise assert */
874 #if 0
875 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS))
876 priv->control_state |= TIOCM_DTR | TIOCM_RTS;
877 else
878 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
879 mct_u232_set_modem_ctrl(serial, priv->control_state);
880 #endif
881 ;
882 }
883 memcpy(cfg, &priv->cfg, sizeof(*cfg));
884 spin_unlock_irqrestore(&priv->lock, flags);
885
886 /* now commit changes to device */
887 klsi_105_chg_port_settings(port, cfg);
888 err:
889 kfree(cfg);
890 } /* klsi_105_set_termios */
891
892
893 #if 0
894 static void mct_u232_break_ctl(struct tty_struct *tty, int break_state)
895 {
896 struct usb_serial_port *port = tty->driver_data;
897 struct usb_serial *serial = port->serial;
898 struct mct_u232_private *priv =
899 (struct mct_u232_private *)port->private;
900 unsigned char lcr = priv->last_lcr;
901
902 dbg("%sstate=%d", __func__, break_state);
903
904 /* LOCKING */
905 if (break_state)
906 lcr |= MCT_U232_SET_BREAK;
907
908 mct_u232_set_line_ctrl(serial, lcr);
909 } /* mct_u232_break_ctl */
910 #endif
911
912 static int klsi_105_tiocmget(struct tty_struct *tty, struct file *file)
913 {
914 struct usb_serial_port *port = tty->driver_data;
915 struct klsi_105_private *priv = usb_get_serial_port_data(port);
916 unsigned long flags;
917 int rc;
918 unsigned long line_state;
919 dbg("%s - request, just guessing", __func__);
920
921 rc = klsi_105_get_line_state(port, &line_state);
922 if (rc < 0) {
923 dev_err(&port->dev,
924 "Reading line control failed (error = %d)\n", rc);
925 /* better return value? EAGAIN? */
926 return rc;
927 }
928
929 spin_lock_irqsave(&priv->lock, flags);
930 priv->line_state = line_state;
931 spin_unlock_irqrestore(&priv->lock, flags);
932 dbg("%s - read line state 0x%lx", __func__, line_state);
933 return (int)line_state;
934 }
935
936 static int klsi_105_tiocmset(struct tty_struct *tty, struct file *file,
937 unsigned int set, unsigned int clear)
938 {
939 int retval = -EINVAL;
940
941 dbg("%s", __func__);
942
943 /* if this ever gets implemented, it should be done something like this:
944 struct usb_serial *serial = port->serial;
945 struct klsi_105_private *priv = usb_get_serial_port_data(port);
946 unsigned long flags;
947 int control;
948
949 spin_lock_irqsave (&priv->lock, flags);
950 if (set & TIOCM_RTS)
951 priv->control_state |= TIOCM_RTS;
952 if (set & TIOCM_DTR)
953 priv->control_state |= TIOCM_DTR;
954 if (clear & TIOCM_RTS)
955 priv->control_state &= ~TIOCM_RTS;
956 if (clear & TIOCM_DTR)
957 priv->control_state &= ~TIOCM_DTR;
958 control = priv->control_state;
959 spin_unlock_irqrestore (&priv->lock, flags);
960 retval = mct_u232_set_modem_ctrl(serial, control);
961 */
962 return retval;
963 }
964
965 static void klsi_105_throttle(struct tty_struct *tty)
966 {
967 struct usb_serial_port *port = tty->driver_data;
968 dbg("%s - port %d", __func__, port->number);
969 usb_kill_urb(port->read_urb);
970 }
971
972 static void klsi_105_unthrottle(struct tty_struct *tty)
973 {
974 struct usb_serial_port *port = tty->driver_data;
975 int result;
976
977 dbg("%s - port %d", __func__, port->number);
978
979 port->read_urb->dev = port->serial->dev;
980 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
981 if (result)
982 dev_err(&port->dev,
983 "%s - failed submitting read urb, error %d\n",
984 __func__, result);
985 }
986
987
988
989 static int __init klsi_105_init(void)
990 {
991 int retval;
992 retval = usb_serial_register(&kl5kusb105d_device);
993 if (retval)
994 goto failed_usb_serial_register;
995 retval = usb_register(&kl5kusb105d_driver);
996 if (retval)
997 goto failed_usb_register;
998
999 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1000 DRIVER_DESC "\n");
1001 return 0;
1002 failed_usb_register:
1003 usb_serial_deregister(&kl5kusb105d_device);
1004 failed_usb_serial_register:
1005 return retval;
1006 }
1007
1008
1009 static void __exit klsi_105_exit(void)
1010 {
1011 usb_deregister(&kl5kusb105d_driver);
1012 usb_serial_deregister(&kl5kusb105d_device);
1013 }
1014
1015
1016 module_init(klsi_105_init);
1017 module_exit(klsi_105_exit);
1018
1019 MODULE_AUTHOR(DRIVER_AUTHOR);
1020 MODULE_DESCRIPTION(DRIVER_DESC);
1021 MODULE_LICENSE("GPL");
1022
1023
1024 module_param(debug, bool, S_IRUGO | S_IWUSR);
1025 MODULE_PARM_DESC(debug, "enable extensive debugging messages");
1026
1027 /* vim: set sts=8 ts=8 sw=8: */
Linux kernel - Deliverables
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