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x86: 64-bit, add the new split_large_page() function
[wrt350n-kernel.git] / drivers / usb / serial / kl5kusb105.c
blob90e3216abd1f006800f0d2ed018a83c12a9b5cc0
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 .usb_driver = &kl5kusb105d_driver,
128 .id_table = id_table,
129 .num_interrupt_in = 1,
130 .num_bulk_in = 1,
131 .num_bulk_out = 1,
132 .num_ports = 1,
133 .open = klsi_105_open,
134 .close = klsi_105_close,
135 .write = klsi_105_write,
136 .write_bulk_callback = klsi_105_write_bulk_callback,
137 .chars_in_buffer = klsi_105_chars_in_buffer,
138 .write_room = klsi_105_write_room,
139 .read_bulk_callback =klsi_105_read_bulk_callback,
140 .set_termios = klsi_105_set_termios,
141 /*.break_ctl = klsi_105_break_ctl,*/
142 .tiocmget = klsi_105_tiocmget,
143 .tiocmset = klsi_105_tiocmset,
144 .attach = klsi_105_startup,
145 .shutdown = klsi_105_shutdown,
146 .throttle = klsi_105_throttle,
147 .unthrottle = klsi_105_unthrottle,
148 };
149
150 struct klsi_105_port_settings {
151 __u8 pktlen; /* always 5, it seems */
152 __u8 baudrate;
153 __u8 databits;
154 __u8 unknown1;
155 __u8 unknown2;
156 } __attribute__ ((packed));
157
158 /* we implement a pool of NUM_URBS urbs per usb_serial */
159 #define NUM_URBS 1
160 #define URB_TRANSFER_BUFFER_SIZE 64
161 struct klsi_105_private {
162 struct klsi_105_port_settings cfg;
163 struct ktermios termios;
164 unsigned long line_state; /* modem line settings */
165 /* write pool */
166 struct urb * write_urb_pool[NUM_URBS];
167 spinlock_t lock;
168 unsigned long bytes_in;
169 unsigned long bytes_out;
170 };
171
172
173 /*
174 * Handle vendor specific USB requests
175 */
176
177
178 #define KLSI_TIMEOUT 5000 /* default urb timeout */
179
180 static int klsi_105_chg_port_settings(struct usb_serial_port *port,
181 struct klsi_105_port_settings *settings)
182 {
183 int rc;
184
185 rc = usb_control_msg(port->serial->dev,
186 usb_sndctrlpipe(port->serial->dev, 0),
187 KL5KUSB105A_SIO_SET_DATA,
188 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE,
189 0, /* value */
190 0, /* index */
191 settings,
192 sizeof(struct klsi_105_port_settings),
193 KLSI_TIMEOUT);
194 if (rc < 0)
195 err("Change port settings failed (error = %d)", rc);
196 info("%s - %d byte block, baudrate %x, databits %d, u1 %d, u2 %d",
197 __FUNCTION__,
198 settings->pktlen,
199 settings->baudrate, settings->databits,
200 settings->unknown1, settings->unknown2);
201 return rc;
202 } /* klsi_105_chg_port_settings */
203
204 /* translate a 16-bit status value from the device to linux's TIO bits */
205 static unsigned long klsi_105_status2linestate(const __u16 status)
206 {
207 unsigned long res = 0;
208
209 res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0)
210 | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0)
211 ;
212
213 return res;
214 }
215 /*
216 * Read line control via vendor command and return result through
217 * *line_state_p
218 */
219 /* It seems that the status buffer has always only 2 bytes length */
220 #define KLSI_STATUSBUF_LEN 2
221 static int klsi_105_get_line_state(struct usb_serial_port *port,
222 unsigned long *line_state_p)
223 {
224 int rc;
225 __u8 status_buf[KLSI_STATUSBUF_LEN] = { -1,-1};
226 __u16 status;
227
228 info("%s - sending SIO Poll request", __FUNCTION__);
229 rc = usb_control_msg(port->serial->dev,
230 usb_rcvctrlpipe(port->serial->dev, 0),
231 KL5KUSB105A_SIO_POLL,
232 USB_TYPE_VENDOR | USB_DIR_IN,
233 0, /* value */
234 0, /* index */
235 status_buf, KLSI_STATUSBUF_LEN,
236 10000
237 );
238 if (rc < 0)
239 err("Reading line status failed (error = %d)", rc);
240 else {
241 status = le16_to_cpu(*(u16 *)status_buf);
242
243 info("%s - read status %x %x", __FUNCTION__,
244 status_buf[0], status_buf[1]);
245
246 *line_state_p = klsi_105_status2linestate(status);
247 }
248
249 return rc;
250 }
251
252
253 /*
254 * Driver's tty interface functions
255 */
256
257 static int klsi_105_startup (struct usb_serial *serial)
258 {
259 struct klsi_105_private *priv;
260 int i, j;
261
262 /* check if we support the product id (see keyspan.c)
263 * FIXME
264 */
265
266 /* allocate the private data structure */
267 for (i=0; i<serial->num_ports; i++) {
268 priv = kmalloc(sizeof(struct klsi_105_private),
269 GFP_KERNEL);
270 if (!priv) {
271 dbg("%skmalloc for klsi_105_private failed.", __FUNCTION__);
272 i--;
273 goto err_cleanup;
274 }
275 /* set initial values for control structures */
276 priv->cfg.pktlen = 5;
277 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
278 priv->cfg.databits = kl5kusb105a_dtb_8;
279 priv->cfg.unknown1 = 0;
280 priv->cfg.unknown2 = 1;
281
282 priv->line_state = 0;
283
284 priv->bytes_in = 0;
285 priv->bytes_out = 0;
286 usb_set_serial_port_data(serial->port[i], priv);
287
288 spin_lock_init (&priv->lock);
289 for (j=0; j<NUM_URBS; j++) {
290 struct urb* urb = usb_alloc_urb(0, GFP_KERNEL);
291
292 priv->write_urb_pool[j] = urb;
293 if (urb == NULL) {
294 err("No more urbs???");
295 goto err_cleanup;
296 }
297
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 goto err_cleanup;
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
312 err_cleanup:
313 for (; i >= 0; i--) {
314 priv = usb_get_serial_port_data(serial->port[i]);
315 for (j=0; j < NUM_URBS; j++) {
316 if (priv->write_urb_pool[j]) {
317 kfree(priv->write_urb_pool[j]->transfer_buffer);
318 usb_free_urb(priv->write_urb_pool[j]);
319 }
320 }
321 usb_set_serial_port_data(serial->port[i], NULL);
322 }
323 return -ENOMEM;
324 } /* klsi_105_startup */
325
326
327 static void klsi_105_shutdown (struct usb_serial *serial)
328 {
329 int i;
330
331 dbg("%s", __FUNCTION__);
332
333 /* stop reads and writes on all ports */
334 for (i=0; i < serial->num_ports; ++i) {
335 struct klsi_105_private *priv = usb_get_serial_port_data(serial->port[i]);
336 unsigned long flags;
337
338 if (priv) {
339 /* kill our write urb pool */
340 int j;
341 struct urb **write_urbs = priv->write_urb_pool;
342 spin_lock_irqsave(&priv->lock,flags);
343
344 for (j = 0; j < NUM_URBS; j++) {
345 if (write_urbs[j]) {
346 /* FIXME - uncomment the following
347 * usb_kill_urb call when the host
348 * controllers get fixed to set
349 * urb->dev = NULL after the urb is
350 * finished. Otherwise this call
351 * oopses. */
352 /* usb_kill_urb(write_urbs[j]); */
353 kfree(write_urbs[j]->transfer_buffer);
354 usb_free_urb (write_urbs[j]);
355 }
356 }
357
358 spin_unlock_irqrestore (&priv->lock, flags);
359
360 kfree(priv);
361 usb_set_serial_port_data(serial->port[i], NULL);
362 }
363 }
364 } /* klsi_105_shutdown */
365
366 static int klsi_105_open (struct usb_serial_port *port, struct file *filp)
367 {
368 struct klsi_105_private *priv = usb_get_serial_port_data(port);
369 int retval = 0;
370 int rc;
371 int i;
372 unsigned long line_state;
373 struct klsi_105_port_settings cfg;
374 unsigned long flags;
375
376 dbg("%s port %d", __FUNCTION__, port->number);
377
378 /* force low_latency on so that our tty_push actually forces
379 * the data through
380 * port->tty->low_latency = 1; */
381
382 /* Do a defined restart:
383 * Set up sane default baud rate and send the 'READ_ON'
384 * vendor command.
385 * FIXME: set modem line control (how?)
386 * Then read the modem line control and store values in
387 * priv->line_state.
388 */
389 cfg.pktlen = 5;
390 cfg.baudrate = kl5kusb105a_sio_b9600;
391 cfg.databits = kl5kusb105a_dtb_8;
392 cfg.unknown1 = 0;
393 cfg.unknown2 = 1;
394 klsi_105_chg_port_settings(port, &cfg);
395
396 /* set up termios structure */
397 spin_lock_irqsave (&priv->lock, flags);
398 priv->termios.c_iflag = port->tty->termios->c_iflag;
399 priv->termios.c_oflag = port->tty->termios->c_oflag;
400 priv->termios.c_cflag = port->tty->termios->c_cflag;
401 priv->termios.c_lflag = port->tty->termios->c_lflag;
402 for (i=0; i<NCCS; i++)
403 priv->termios.c_cc[i] = port->tty->termios->c_cc[i];
404 priv->cfg.pktlen = cfg.pktlen;
405 priv->cfg.baudrate = cfg.baudrate;
406 priv->cfg.databits = cfg.databits;
407 priv->cfg.unknown1 = cfg.unknown1;
408 priv->cfg.unknown2 = cfg.unknown2;
409 spin_unlock_irqrestore (&priv->lock, flags);
410
411 /* READ_ON and urb submission */
412 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
413 usb_rcvbulkpipe(port->serial->dev,
414 port->bulk_in_endpointAddress),
415 port->read_urb->transfer_buffer,
416 port->read_urb->transfer_buffer_length,
417 klsi_105_read_bulk_callback,
418 port);
419
420 rc = usb_submit_urb(port->read_urb, GFP_KERNEL);
421 if (rc) {
422 err("%s - failed submitting read urb, error %d", __FUNCTION__, rc);
423 retval = rc;
424 goto exit;
425 }
426
427 rc = usb_control_msg(port->serial->dev,
428 usb_sndctrlpipe(port->serial->dev,0),
429 KL5KUSB105A_SIO_CONFIGURE,
430 USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
431 KL5KUSB105A_SIO_CONFIGURE_READ_ON,
432 0, /* index */
433 NULL,
434 0,
435 KLSI_TIMEOUT);
436 if (rc < 0) {
437 err("Enabling read failed (error = %d)", rc);
438 retval = rc;
439 } else
440 dbg("%s - enabled reading", __FUNCTION__);
441
442 rc = klsi_105_get_line_state(port, &line_state);
443 if (rc >= 0) {
444 spin_lock_irqsave (&priv->lock, flags);
445 priv->line_state = line_state;
446 spin_unlock_irqrestore (&priv->lock, flags);
447 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state);
448 retval = 0;
449 } else
450 retval = rc;
451
452 exit:
453 return retval;
454 } /* klsi_105_open */
455
456
457 static void klsi_105_close (struct usb_serial_port *port, struct file *filp)
458 {
459 struct klsi_105_private *priv = usb_get_serial_port_data(port);
460 int rc;
461
462 dbg("%s port %d", __FUNCTION__, port->number);
463
464 /* send READ_OFF */
465 rc = usb_control_msg (port->serial->dev,
466 usb_sndctrlpipe(port->serial->dev, 0),
467 KL5KUSB105A_SIO_CONFIGURE,
468 USB_TYPE_VENDOR | USB_DIR_OUT,
469 KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
470 0, /* index */
471 NULL, 0,
472 KLSI_TIMEOUT);
473 if (rc < 0)
474 err("Disabling read failed (error = %d)", rc);
475
476 /* shutdown our bulk reads and writes */
477 usb_kill_urb(port->write_urb);
478 usb_kill_urb(port->read_urb);
479 /* unlink our write pool */
480 /* FIXME */
481 /* wgg - do I need this? I think so. */
482 usb_kill_urb(port->interrupt_in_urb);
483 info("kl5kusb105 port stats: %ld bytes in, %ld bytes out", priv->bytes_in, priv->bytes_out);
484 } /* klsi_105_close */
485
486
487 /* We need to write a complete 64-byte data block and encode the
488 * number actually sent in the first double-byte, LSB-order. That
489 * leaves at most 62 bytes of payload.
490 */
491 #define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */
492
493
494 static int klsi_105_write (struct usb_serial_port *port,
495 const unsigned char *buf, int count)
496 {
497 struct klsi_105_private *priv = usb_get_serial_port_data(port);
498 int result, size;
499 int bytes_sent=0;
500
501 dbg("%s - port %d", __FUNCTION__, port->number);
502
503 while (count > 0) {
504 /* try to find a free urb (write 0 bytes if none) */
505 struct urb *urb = NULL;
506 unsigned long flags;
507 int i;
508 /* since the pool is per-port we might not need the spin lock !? */
509 spin_lock_irqsave (&priv->lock, flags);
510 for (i=0; i<NUM_URBS; i++) {
511 if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
512 urb = priv->write_urb_pool[i];
513 dbg("%s - using pool URB %d", __FUNCTION__, i);
514 break;
515 }
516 }
517 spin_unlock_irqrestore (&priv->lock, flags);
518
519 if (urb==NULL) {
520 dbg("%s - no more free urbs", __FUNCTION__);
521 goto exit;
522 }
523
524 if (urb->transfer_buffer == NULL) {
525 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
526 if (urb->transfer_buffer == NULL) {
527 err("%s - no more kernel memory...", __FUNCTION__);
528 goto exit;
529 }
530 }
531
532 size = min (count, port->bulk_out_size - KLSI_105_DATA_OFFSET);
533 size = min (size, URB_TRANSFER_BUFFER_SIZE - KLSI_105_DATA_OFFSET);
534
535 memcpy (urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size);
536
537 /* write payload size into transfer buffer */
538 ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF);
539 ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8);
540
541 /* set up our urb */
542 usb_fill_bulk_urb(urb, port->serial->dev,
543 usb_sndbulkpipe(port->serial->dev,
544 port->bulk_out_endpointAddress),
545 urb->transfer_buffer,
546 URB_TRANSFER_BUFFER_SIZE,
547 klsi_105_write_bulk_callback,
548 port);
549
550 /* send the data out the bulk port */
551 result = usb_submit_urb(urb, GFP_ATOMIC);
552 if (result) {
553 err("%s - failed submitting write urb, error %d", __FUNCTION__, 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 = (struct usb_serial_port *)urb->context;
570 int status = urb->status;
571
572 dbg("%s - port %d", __FUNCTION__, port->number);
573
574 if (status) {
575 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__,
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 usb_serial_port *port)
586 {
587 int chars = 0;
588 int i;
589 unsigned long flags;
590 struct klsi_105_private *priv = usb_get_serial_port_data(port);
591
592 spin_lock_irqsave (&priv->lock, flags);
593
594 for (i = 0; i < NUM_URBS; ++i) {
595 if (priv->write_urb_pool[i]->status == -EINPROGRESS) {
596 chars += URB_TRANSFER_BUFFER_SIZE;
597 }
598 }
599
600 spin_unlock_irqrestore (&priv->lock, flags);
601
602 dbg("%s - returns %d", __FUNCTION__, chars);
603 return (chars);
604 }
605
606 static int klsi_105_write_room (struct usb_serial_port *port)
607 {
608 unsigned long flags;
609 int i;
610 int room = 0;
611 struct klsi_105_private *priv = usb_get_serial_port_data(port);
612
613 spin_lock_irqsave (&priv->lock, flags);
614 for (i = 0; i < NUM_URBS; ++i) {
615 if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
616 room += URB_TRANSFER_BUFFER_SIZE;
617 }
618 }
619
620 spin_unlock_irqrestore (&priv->lock, flags);
621
622 dbg("%s - returns %d", __FUNCTION__, 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 = (struct usb_serial_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", __FUNCTION__, port->number);
638
639 /* The urb might have been killed. */
640 if (status) {
641 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__,
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", __FUNCTION__); */
652 ;
653 } else if (urb->actual_length <= 2) {
654 dbg("%s - size %d URB not understood", __FUNCTION__,
655 urb->actual_length);
656 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
657 urb->actual_length, data);
658 } else {
659 int bytes_sent = ((__u8 *) data)[0] +
660 ((unsigned int) ((__u8 *) data)[1] << 8);
661 tty = port->tty;
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, __FUNCTION__,
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)", __FUNCTION__,
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
683 /* again lockless, but debug info only */
684 priv->bytes_in += bytes_sent;
685 }
686 /* Continue trying to always read */
687 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
688 usb_rcvbulkpipe(port->serial->dev,
689 port->bulk_in_endpointAddress),
690 port->read_urb->transfer_buffer,
691 port->read_urb->transfer_buffer_length,
692 klsi_105_read_bulk_callback,
693 port);
694 rc = usb_submit_urb(port->read_urb, GFP_ATOMIC);
695 if (rc)
696 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, rc);
697 } /* klsi_105_read_bulk_callback */
698
699
700 static void klsi_105_set_termios (struct usb_serial_port *port,
701 struct ktermios *old_termios)
702 {
703 struct klsi_105_private *priv = usb_get_serial_port_data(port);
704 unsigned int iflag = port->tty->termios->c_iflag;
705 unsigned int old_iflag = old_termios->c_iflag;
706 unsigned int cflag = port->tty->termios->c_cflag;
707 unsigned int old_cflag = old_termios->c_cflag;
708 struct klsi_105_port_settings cfg;
709 unsigned long flags;
710
711 /* lock while we are modifying the settings */
712 spin_lock_irqsave (&priv->lock, flags);
713
714 /*
715 * Update baud rate
716 */
717 if( (cflag & CBAUD) != (old_cflag & CBAUD) ) {
718 /* reassert DTR and (maybe) RTS on transition from B0 */
719 if( (old_cflag & CBAUD) == B0 ) {
720 dbg("%s: baud was B0", __FUNCTION__);
721 #if 0
722 priv->control_state |= TIOCM_DTR;
723 /* don't set RTS if using hardware flow control */
724 if (!(old_cflag & CRTSCTS)) {
725 priv->control_state |= TIOCM_RTS;
726 }
727 mct_u232_set_modem_ctrl(serial, priv->control_state);
728 #endif
729 }
730
731 switch(tty_get_baud_rate(port->tty)) {
732 case 0: /* handled below */
733 break;
734 case 1200:
735 priv->cfg.baudrate = kl5kusb105a_sio_b1200;
736 break;
737 case 2400:
738 priv->cfg.baudrate = kl5kusb105a_sio_b2400;
739 break;
740 case 4800:
741 priv->cfg.baudrate = kl5kusb105a_sio_b4800;
742 break;
743 case 9600:
744 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
745 break;
746 case 19200:
747 priv->cfg.baudrate = kl5kusb105a_sio_b19200;
748 break;
749 case 38400:
750 priv->cfg.baudrate = kl5kusb105a_sio_b38400;
751 break;
752 case 57600:
753 priv->cfg.baudrate = kl5kusb105a_sio_b57600;
754 break;
755 case 115200:
756 priv->cfg.baudrate = kl5kusb105a_sio_b115200;
757 break;
758 default:
759 err("KLSI USB->Serial converter:"
760 " unsupported baudrate request, using default"
761 " of 9600");
762 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
763 break;
764 }
765 if ((cflag & CBAUD) == B0 ) {
766 dbg("%s: baud is B0", __FUNCTION__);
767 /* Drop RTS and DTR */
768 /* maybe this should be simulated by sending read
769 * disable and read enable messages?
770 */
771 ;
772 #if 0
773 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
774 mct_u232_set_modem_ctrl(serial, priv->control_state);
775 #endif
776 }
777 }
778
779 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
780 /* set the number of data bits */
781 switch (cflag & CSIZE) {
782 case CS5:
783 dbg("%s - 5 bits/byte not supported", __FUNCTION__);
784 spin_unlock_irqrestore (&priv->lock, flags);
785 return ;
786 case CS6:
787 dbg("%s - 6 bits/byte not supported", __FUNCTION__);
788 spin_unlock_irqrestore (&priv->lock, flags);
789 return ;
790 case CS7:
791 priv->cfg.databits = kl5kusb105a_dtb_7;
792 break;
793 case CS8:
794 priv->cfg.databits = kl5kusb105a_dtb_8;
795 break;
796 default:
797 err("CSIZE was not CS5-CS8, using default of 8");
798 priv->cfg.databits = kl5kusb105a_dtb_8;
799 break;
800 }
801 }
802
803 /*
804 * Update line control register (LCR)
805 */
806 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
807 || (cflag & CSTOPB) != (old_cflag & CSTOPB) ) {
808
809 #if 0
810 priv->last_lcr = 0;
811
812 /* set the parity */
813 if (cflag & PARENB)
814 priv->last_lcr |= (cflag & PARODD) ?
815 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
816 else
817 priv->last_lcr |= MCT_U232_PARITY_NONE;
818
819 /* set the number of stop bits */
820 priv->last_lcr |= (cflag & CSTOPB) ?
821 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
822
823 mct_u232_set_line_ctrl(serial, priv->last_lcr);
824 #endif
825 ;
826 }
827
828 /*
829 * Set flow control: well, I do not really now how to handle DTR/RTS.
830 * Just do what we have seen with SniffUSB on Win98.
831 */
832 if( (iflag & IXOFF) != (old_iflag & IXOFF)
833 || (iflag & IXON) != (old_iflag & IXON)
834 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS) ) {
835
836 /* Drop DTR/RTS if no flow control otherwise assert */
837 #if 0
838 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS) )
839 priv->control_state |= TIOCM_DTR | TIOCM_RTS;
840 else
841 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
842 mct_u232_set_modem_ctrl(serial, priv->control_state);
843 #endif
844 ;
845 }
846 memcpy (&cfg, &priv->cfg, sizeof(cfg));
847 spin_unlock_irqrestore (&priv->lock, flags);
848
849 /* now commit changes to device */
850 klsi_105_chg_port_settings(port, &cfg);
851 } /* klsi_105_set_termios */
852
853
854 #if 0
855 static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state )
856 {
857 struct usb_serial *serial = port->serial;
858 struct mct_u232_private *priv = (struct mct_u232_private *)port->private;
859 unsigned char lcr = priv->last_lcr;
860
861 dbg("%sstate=%d", __FUNCTION__, break_state);
862
863 if (break_state)
864 lcr |= MCT_U232_SET_BREAK;
865
866 mct_u232_set_line_ctrl(serial, lcr);
867 } /* mct_u232_break_ctl */
868 #endif
869
870 static int klsi_105_tiocmget (struct usb_serial_port *port, struct file *file)
871 {
872 struct klsi_105_private *priv = usb_get_serial_port_data(port);
873 unsigned long flags;
874 int rc;
875 unsigned long line_state;
876 dbg("%s - request, just guessing", __FUNCTION__);
877
878 rc = klsi_105_get_line_state(port, &line_state);
879 if (rc < 0) {
880 err("Reading line control failed (error = %d)", rc);
881 /* better return value? EAGAIN? */
882 return rc;
883 }
884
885 spin_lock_irqsave (&priv->lock, flags);
886 priv->line_state = line_state;
887 spin_unlock_irqrestore (&priv->lock, flags);
888 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state);
889 return (int)line_state;
890 }
891
892 static int klsi_105_tiocmset (struct usb_serial_port *port, struct file *file,
893 unsigned int set, unsigned int clear)
894 {
895 int retval = -EINVAL;
896
897 dbg("%s", __FUNCTION__);
898
899 /* if this ever gets implemented, it should be done something like this:
900 struct usb_serial *serial = port->serial;
901 struct klsi_105_private *priv = usb_get_serial_port_data(port);
902 unsigned long flags;
903 int control;
904
905 spin_lock_irqsave (&priv->lock, flags);
906 if (set & TIOCM_RTS)
907 priv->control_state |= TIOCM_RTS;
908 if (set & TIOCM_DTR)
909 priv->control_state |= TIOCM_DTR;
910 if (clear & TIOCM_RTS)
911 priv->control_state &= ~TIOCM_RTS;
912 if (clear & TIOCM_DTR)
913 priv->control_state &= ~TIOCM_DTR;
914 control = priv->control_state;
915 spin_unlock_irqrestore (&priv->lock, flags);
916 retval = mct_u232_set_modem_ctrl(serial, control);
917 */
918 return retval;
919 }
920
921 static void klsi_105_throttle (struct usb_serial_port *port)
922 {
923 dbg("%s - port %d", __FUNCTION__, port->number);
924 usb_kill_urb(port->read_urb);
925 }
926
927 static void klsi_105_unthrottle (struct usb_serial_port *port)
928 {
929 int result;
930
931 dbg("%s - port %d", __FUNCTION__, port->number);
932
933 port->read_urb->dev = port->serial->dev;
934 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
935 if (result)
936 err("%s - failed submitting read urb, error %d", __FUNCTION__,
937 result);
938 }
939
940
941
942 static int __init klsi_105_init (void)
943 {
944 int retval;
945 retval = usb_serial_register(&kl5kusb105d_device);
946 if (retval)
947 goto failed_usb_serial_register;
948 retval = usb_register(&kl5kusb105d_driver);
949 if (retval)
950 goto failed_usb_register;
951
952 info(DRIVER_DESC " " DRIVER_VERSION);
953 return 0;
954 failed_usb_register:
955 usb_serial_deregister(&kl5kusb105d_device);
956 failed_usb_serial_register:
957 return retval;
958 }
959
960
961 static void __exit klsi_105_exit (void)
962 {
963 usb_deregister (&kl5kusb105d_driver);
964 usb_serial_deregister (&kl5kusb105d_device);
965 }
966
967
968 module_init (klsi_105_init);
969 module_exit (klsi_105_exit);
970
971 MODULE_AUTHOR( DRIVER_AUTHOR );
972 MODULE_DESCRIPTION( DRIVER_DESC );
973 MODULE_LICENSE("GPL");
974
975
976 module_param(debug, bool, S_IRUGO | S_IWUSR);
977 MODULE_PARM_DESC(debug, "enable extensive debugging messages");
978
979 /* vim: set sts=8 ts=8 sw=8: */
WRT350N Kernel Patches