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[PATCH] TTY layer buffering revamp
[deliverable/linux.git] / drivers / usb / serial / kl5kusb105.c
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1da177e4
LT		 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/config.h>
49#include <linux/kernel.h>
50#include <linux/errno.h>
51#include <linux/init.h>
52#include <linux/slab.h>
53#include <linux/tty.h>
54#include <linux/tty_driver.h>
55#include <linux/tty_flip.h>
56#include <linux/module.h>
57#include <asm/uaccess.h>
58#include <linux/usb.h>
59#include "usb-serial.h"
60#include "kl5kusb105.h"
61
62static 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 */
75static int klsi_105_startup (struct usb_serial *serial);
76static void klsi_105_shutdown (struct usb_serial *serial);
77static int klsi_105_open (struct usb_serial_port *port,
78 struct file *filp);
79static void klsi_105_close (struct usb_serial_port *port,
80 struct file *filp);
81static int klsi_105_write (struct usb_serial_port *port,
82 const unsigned char *buf,
83 int count);
84static void klsi_105_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
85static int klsi_105_chars_in_buffer (struct usb_serial_port *port);
86static int klsi_105_write_room (struct usb_serial_port *port);
87
88static void klsi_105_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
89static void klsi_105_set_termios (struct usb_serial_port *port,
90 struct termios * old);
91static int klsi_105_ioctl (struct usb_serial_port *port,
92 struct file * file,
93 unsigned int cmd,
94 unsigned long arg);
95static void klsi_105_throttle (struct usb_serial_port *port);
96static void klsi_105_unthrottle (struct usb_serial_port *port);
97/*
98static void klsi_105_break_ctl (struct usb_serial_port *port,
99 int break_state );
100 */
101static int klsi_105_tiocmget (struct usb_serial_port *port,
102 struct file *file);
103static int klsi_105_tiocmset (struct usb_serial_port *port,
104 struct file *file, unsigned int set,
105 unsigned int clear);
106
107/*
108 * All of the device info needed for the KLSI converters.
109 */
110static struct usb_device_id id_table [] = {
111 { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) },
112 { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) },
113 { } /* Terminating entry */
114};
115
116MODULE_DEVICE_TABLE (usb, id_table);
117
118static struct usb_driver kl5kusb105d_driver = {
1da177e4
LT		 119 .name = "kl5kusb105d",
120 .probe = usb_serial_probe,
121 .disconnect = usb_serial_disconnect,
122 .id_table = id_table,
ba9dc657 123 .no_dynamic_id = 1,
1da177e4
LT		 124};
125
ea65370d 126static struct usb_serial_driver kl5kusb105d_device = {
18fcac35
GKH		 127 .driver = {
128 .owner = THIS_MODULE,
269bda1c 129 .name = "kl5kusb105d",
18fcac35 130 },
269bda1c 131 .description = "KL5KUSB105D / PalmConnect",
1da177e4
LT		 132 .id_table = id_table,
133 .num_interrupt_in = 1,
134 .num_bulk_in = 1,
135 .num_bulk_out = 1,
136 .num_ports = 1,
137 .open = klsi_105_open,
138 .close = klsi_105_close,
139 .write = klsi_105_write,
140 .write_bulk_callback = klsi_105_write_bulk_callback,
141 .chars_in_buffer = klsi_105_chars_in_buffer,
142 .write_room = klsi_105_write_room,
143 .read_bulk_callback =klsi_105_read_bulk_callback,
144 .ioctl = klsi_105_ioctl,
145 .set_termios = klsi_105_set_termios,
146 /*.break_ctl = klsi_105_break_ctl,*/
147 .tiocmget = klsi_105_tiocmget,
148 .tiocmset = klsi_105_tiocmset,
149 .attach = klsi_105_startup,
150 .shutdown = klsi_105_shutdown,
151 .throttle = klsi_105_throttle,
152 .unthrottle = klsi_105_unthrottle,
153};
154
155struct klsi_105_port_settings {
156 __u8 pktlen; /* always 5, it seems */
157 __u8 baudrate;
158 __u8 databits;
159 __u8 unknown1;
160 __u8 unknown2;
161} __attribute__ ((packed));
162
163/* we implement a pool of NUM_URBS urbs per usb_serial */
164#define NUM_URBS 1
165#define URB_TRANSFER_BUFFER_SIZE 64
166struct klsi_105_private {
167 struct klsi_105_port_settings cfg;
168 struct termios termios;
169 unsigned long line_state; /* modem line settings */
170 /* write pool */
171 struct urb * write_urb_pool[NUM_URBS];
172 spinlock_t lock;
173 unsigned long bytes_in;
174 unsigned long bytes_out;
175};
176
177
178/*
179 * Handle vendor specific USB requests
180 */
181
182
183#define KLSI_TIMEOUT 5000 /* default urb timeout */
184
185static int klsi_105_chg_port_settings(struct usb_serial_port *port,
186 struct klsi_105_port_settings *settings)
187{
188 int rc;
189
190 rc = usb_control_msg(port->serial->dev,
191 usb_sndctrlpipe(port->serial->dev, 0),
192 KL5KUSB105A_SIO_SET_DATA,
193 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE,
194 0, /* value */
195 0, /* index */
196 settings,
197 sizeof(struct klsi_105_port_settings),
198 KLSI_TIMEOUT);
199 if (rc < 0)
200 err("Change port settings failed (error = %d)", rc);
201 info("%s - %d byte block, baudrate %x, databits %d, u1 %d, u2 %d",
202 __FUNCTION__,
203 settings->pktlen,
204 settings->baudrate, settings->databits,
205 settings->unknown1, settings->unknown2);
206 return rc;
207} /* klsi_105_chg_port_settings */
208
209/* translate a 16-bit status value from the device to linux's TIO bits */
210static unsigned long klsi_105_status2linestate(const __u16 status)
211{
212 unsigned long res = 0;
213
214 res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0)
215 | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0)
216 ;
217
218 return res;
219}
220/*
221 * Read line control via vendor command and return result through
222 * *line_state_p
223 */
224/* It seems that the status buffer has always only 2 bytes length */
225#define KLSI_STATUSBUF_LEN 2
226static int klsi_105_get_line_state(struct usb_serial_port *port,
227 unsigned long *line_state_p)
228{
229 int rc;
230 __u8 status_buf[KLSI_STATUSBUF_LEN] = { -1,-1};
231 __u16 status;
232
233 info("%s - sending SIO Poll request", __FUNCTION__);
234 rc = usb_control_msg(port->serial->dev,
235 usb_rcvctrlpipe(port->serial->dev, 0),
236 KL5KUSB105A_SIO_POLL,
237 USB_TYPE_VENDOR | USB_DIR_IN,
238 0, /* value */
239 0, /* index */
240 status_buf, KLSI_STATUSBUF_LEN,
241 10000
242 );
243 if (rc < 0)
244 err("Reading line status failed (error = %d)", rc);
245 else {
246 status = status_buf[0] + (status_buf[1]<<8);
247
248 info("%s - read status %x %x", __FUNCTION__,
249 status_buf[0], status_buf[1]);
250
251 *line_state_p = klsi_105_status2linestate(status);
252 }
253
254 return rc;
255}
256
257
258/*
259 * Driver's tty interface functions
260 */
261
262static int klsi_105_startup (struct usb_serial *serial)
263{
264 struct klsi_105_private *priv;
265 int i;
266
267 /* check if we support the product id (see keyspan.c)
268 * FIXME
269 */
270
271 /* allocate the private data structure */
272 for (i=0; i<serial->num_ports; i++) {
273 int j;
274 priv = kmalloc(sizeof(struct klsi_105_private),
275 GFP_KERNEL);
276 if (!priv) {
277 dbg("%skmalloc for klsi_105_private failed.", __FUNCTION__);
278 return -ENOMEM;
279 }
280 /* set initial values for control structures */
281 priv->cfg.pktlen = 5;
282 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
283 priv->cfg.databits = kl5kusb105a_dtb_8;
284 priv->cfg.unknown1 = 0;
285 priv->cfg.unknown2 = 1;
286
287 priv->line_state = 0;
288
289 priv->bytes_in = 0;
290 priv->bytes_out = 0;
291 usb_set_serial_port_data(serial->port[i], priv);
292
293 spin_lock_init (&priv->lock);
294 for (j=0; j<NUM_URBS; j++) {
295 struct urb* urb = usb_alloc_urb(0, GFP_KERNEL);
296
297 priv->write_urb_pool[j] = urb;
298 if (urb == NULL) {
299 err("No more urbs???");
300 continue;
301 }
302
303 urb->transfer_buffer = NULL;
304 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE,
305 GFP_KERNEL);
306 if (!urb->transfer_buffer) {
307 err("%s - out of memory for urb buffers.", __FUNCTION__);
308 continue;
309 }
310 }
311
312 /* priv->termios is left uninitalized until port opening */
313 init_waitqueue_head(&serial->port[i]->write_wait);
314 }
315
316 return (0);
317} /* klsi_105_startup */
318
319
320static void klsi_105_shutdown (struct usb_serial *serial)
321{
322 int i;
323
324 dbg("%s", __FUNCTION__);
325
326 /* stop reads and writes on all ports */
327 for (i=0; i < serial->num_ports; ++i) {
328 struct klsi_105_private *priv = usb_get_serial_port_data(serial->port[i]);
329 unsigned long flags;
330
331 if (priv) {
332 /* kill our write urb pool */
333 int j;
334 struct urb **write_urbs = priv->write_urb_pool;
335 spin_lock_irqsave(&priv->lock,flags);
336
337 for (j = 0; j < NUM_URBS; j++) {
338 if (write_urbs[j]) {
339 /* FIXME - uncomment the following
340 * usb_kill_urb call when the host
341 * controllers get fixed to set
342 * urb->dev = NULL after the urb is
343 * finished. Otherwise this call
344 * oopses. */
345 /* usb_kill_urb(write_urbs[j]); */
1bc3c9e1 346 kfree(write_urbs[j]->transfer_buffer);
1da177e4
LT		 347 usb_free_urb (write_urbs[j]);
348 }
349 }
350
351 spin_unlock_irqrestore (&priv->lock, flags);
352
353 kfree(priv);
354 usb_set_serial_port_data(serial->port[i], NULL);
355 }
356 }
357} /* klsi_105_shutdown */
358
359static int klsi_105_open (struct usb_serial_port *port, struct file *filp)
360{
361 struct klsi_105_private *priv = usb_get_serial_port_data(port);
362 int retval = 0;
363 int rc;
364 int i;
365 unsigned long line_state;
366 struct klsi_105_port_settings cfg;
367 unsigned long flags;
368
369 dbg("%s port %d", __FUNCTION__, port->number);
370
371 /* force low_latency on so that our tty_push actually forces
372 * the data through
373 * port->tty->low_latency = 1; */
374
375 /* Do a defined restart:
376 * Set up sane default baud rate and send the 'READ_ON'
377 * vendor command.
378 * FIXME: set modem line control (how?)
379 * Then read the modem line control and store values in
380 * priv->line_state.
381 */
382 cfg.pktlen = 5;
383 cfg.baudrate = kl5kusb105a_sio_b9600;
384 cfg.databits = kl5kusb105a_dtb_8;
385 cfg.unknown1 = 0;
386 cfg.unknown2 = 1;
387 klsi_105_chg_port_settings(port, &cfg);
388
389 /* set up termios structure */
390 spin_lock_irqsave (&priv->lock, flags);
391 priv->termios.c_iflag = port->tty->termios->c_iflag;
392 priv->termios.c_oflag = port->tty->termios->c_oflag;
393 priv->termios.c_cflag = port->tty->termios->c_cflag;
394 priv->termios.c_lflag = port->tty->termios->c_lflag;
395 for (i=0; i<NCCS; i++)
396 priv->termios.c_cc[i] = port->tty->termios->c_cc[i];
397 priv->cfg.pktlen = cfg.pktlen;
398 priv->cfg.baudrate = cfg.baudrate;
399 priv->cfg.databits = cfg.databits;
400 priv->cfg.unknown1 = cfg.unknown1;
401 priv->cfg.unknown2 = cfg.unknown2;
402 spin_unlock_irqrestore (&priv->lock, flags);
403
404 /* READ_ON and urb submission */
405 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
406 usb_rcvbulkpipe(port->serial->dev,
407 port->bulk_in_endpointAddress),
408 port->read_urb->transfer_buffer,
409 port->read_urb->transfer_buffer_length,
410 klsi_105_read_bulk_callback,
411 port);
412
413 rc = usb_submit_urb(port->read_urb, GFP_KERNEL);
414 if (rc) {
415 err("%s - failed submitting read urb, error %d", __FUNCTION__, rc);
416 retval = rc;
417 goto exit;
418 }
419
420 rc = usb_control_msg(port->serial->dev,
421 usb_sndctrlpipe(port->serial->dev,0),
422 KL5KUSB105A_SIO_CONFIGURE,
423 USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
424 KL5KUSB105A_SIO_CONFIGURE_READ_ON,
425 0, /* index */
426 NULL,
427 0,
428 KLSI_TIMEOUT);
429 if (rc < 0) {
430 err("Enabling read failed (error = %d)", rc);
431 retval = rc;
432 } else
433 dbg("%s - enabled reading", __FUNCTION__);
434
435 rc = klsi_105_get_line_state(port, &line_state);
436 if (rc >= 0) {
437 spin_lock_irqsave (&priv->lock, flags);
438 priv->line_state = line_state;
439 spin_unlock_irqrestore (&priv->lock, flags);
440 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state);
441 retval = 0;
442 } else
443 retval = rc;
444
445exit:
446 return retval;
447} /* klsi_105_open */
448
449
450static void klsi_105_close (struct usb_serial_port *port, struct file *filp)
451{
452 struct klsi_105_private *priv = usb_get_serial_port_data(port);
453 int rc;
454
455 dbg("%s port %d", __FUNCTION__, port->number);
456
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 /* shutdown our bulk reads and writes */
470 usb_kill_urb(port->write_urb);
471 usb_kill_urb(port->read_urb);
472 /* unlink our write pool */
473 /* FIXME */
474 /* wgg - do I need this? I think so. */
475 usb_kill_urb(port->interrupt_in_urb);
476 info("kl5kusb105 port stats: %ld bytes in, %ld bytes out", priv->bytes_in, priv->bytes_out);
477} /* klsi_105_close */
478
479
480/* We need to write a complete 64-byte data block and encode the
481 * number actually sent in the first double-byte, LSB-order. That
482 * leaves at most 62 bytes of payload.
483 */
484#define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */
485
486
487static int klsi_105_write (struct usb_serial_port *port,
488 const unsigned char *buf, int count)
489{
490 struct klsi_105_private *priv = usb_get_serial_port_data(port);
491 int result, size;
492 int bytes_sent=0;
493
494 dbg("%s - port %d", __FUNCTION__, port->number);
495
496 while (count > 0) {
497 /* try to find a free urb (write 0 bytes if none) */
498 struct urb *urb = NULL;
499 unsigned long flags;
500 int i;
501 /* since the pool is per-port we might not need the spin lock !? */
502 spin_lock_irqsave (&priv->lock, flags);
503 for (i=0; i<NUM_URBS; i++) {
504 if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
505 urb = priv->write_urb_pool[i];
506 dbg("%s - using pool URB %d", __FUNCTION__, i);
507 break;
508 }
509 }
510 spin_unlock_irqrestore (&priv->lock, flags);
511
512 if (urb==NULL) {
513 dbg("%s - no more free urbs", __FUNCTION__);
514 goto exit;
515 }
516
517 if (urb->transfer_buffer == NULL) {
518 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
519 if (urb->transfer_buffer == NULL) {
520 err("%s - no more kernel memory...", __FUNCTION__);
521 goto exit;
522 }
523 }
524
525 size = min (count, port->bulk_out_size - KLSI_105_DATA_OFFSET);
526 size = min (size, URB_TRANSFER_BUFFER_SIZE - KLSI_105_DATA_OFFSET);
527
528 memcpy (urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size);
529
530 /* write payload size into transfer buffer */
531 ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF);
532 ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8);
533
534 /* set up our urb */
535 usb_fill_bulk_urb(urb, port->serial->dev,
536 usb_sndbulkpipe(port->serial->dev,
537 port->bulk_out_endpointAddress),
538 urb->transfer_buffer,
539 URB_TRANSFER_BUFFER_SIZE,
540 klsi_105_write_bulk_callback,
541 port);
542
543 /* send the data out the bulk port */
544 result = usb_submit_urb(urb, GFP_ATOMIC);
545 if (result) {
546 err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
547 goto exit;
548 }
549 buf += size;
550 bytes_sent += size;
551 count -= size;
552 }
553exit:
554 /* lockless, but it's for debug info only... */
555 priv->bytes_out+=bytes_sent;
556
557 return bytes_sent; /* that's how much we wrote */
558} /* klsi_105_write */
559
560static void klsi_105_write_bulk_callback ( struct urb *urb, struct pt_regs *regs)
561{
562 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
563
564 dbg("%s - port %d", __FUNCTION__, port->number);
565
566 if (urb->status) {
567 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__,
568 urb->status);
569 return;
570 }
571
572 /* from generic_write_bulk_callback */
573 schedule_work(&port->work);
574} /* klsi_105_write_bulk_completion_callback */
575
576
577/* return number of characters currently in the writing process */
578static int klsi_105_chars_in_buffer (struct usb_serial_port *port)
579{
580 int chars = 0;
581 int i;
582 unsigned long flags;
583 struct klsi_105_private *priv = usb_get_serial_port_data(port);
584
585 spin_lock_irqsave (&priv->lock, flags);
586
587 for (i = 0; i < NUM_URBS; ++i) {
588 if (priv->write_urb_pool[i]->status == -EINPROGRESS) {
589 chars += URB_TRANSFER_BUFFER_SIZE;
590 }
591 }
592
593 spin_unlock_irqrestore (&priv->lock, flags);
594
595 dbg("%s - returns %d", __FUNCTION__, chars);
596 return (chars);
597}
598
599static int klsi_105_write_room (struct usb_serial_port *port)
600{
601 unsigned long flags;
602 int i;
603 int room = 0;
604 struct klsi_105_private *priv = usb_get_serial_port_data(port);
605
606 spin_lock_irqsave (&priv->lock, flags);
607 for (i = 0; i < NUM_URBS; ++i) {
608 if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
609 room += URB_TRANSFER_BUFFER_SIZE;
610 }
611 }
612
613 spin_unlock_irqrestore (&priv->lock, flags);
614
615 dbg("%s - returns %d", __FUNCTION__, room);
616 return (room);
617}
618
619
620
621static void klsi_105_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
622{
623 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
624 struct klsi_105_private *priv = usb_get_serial_port_data(port);
625 struct tty_struct *tty;
626 unsigned char *data = urb->transfer_buffer;
627 int rc;
628
629 dbg("%s - port %d", __FUNCTION__, port->number);
630
631 /* The urb might have been killed. */
632 if (urb->status) {
633 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__,
634 urb->status);
635 return;
636 }
637
638 /* The data received is again preceded by a length double-byte in LSB-
639 * first order (see klsi_105_write() )
640 */
641 if (urb->actual_length == 0) {
642 /* empty urbs seem to happen, we ignore them */
643 /* dbg("%s - emtpy URB", __FUNCTION__); */
644 ;
645 } else if (urb->actual_length <= 2) {
646 dbg("%s - size %d URB not understood", __FUNCTION__,
647 urb->actual_length);
648 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
649 urb->actual_length, data);
650 } else {
1da177e4
LT		 651 int bytes_sent = ((__u8 *) data)[0] +
652 ((unsigned int) ((__u8 *) data)[1] << 8);
653 tty = port->tty;
654 /* we should immediately resubmit the URB, before attempting
655 * to pass the data on to the tty layer. But that needs locking
656 * against re-entry an then mixed-up data because of
657 * intermixed tty_flip_buffer_push()s
658 * FIXME
659 */
660 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
661 urb->actual_length, data);
662
663 if (bytes_sent + 2 > urb->actual_length) {
664 dbg("%s - trying to read more data than available"
665 " (%d vs. %d)", __FUNCTION__,
666 bytes_sent+2, urb->actual_length);
667 /* cap at implied limit */
668 bytes_sent = urb->actual_length - 2;
669 }
670
33f0f88f
AC		 671 tty_buffer_request_room(tty, bytes_sent);
672 tty_insert_flip_string(tty, data + 2, bytes_sent);
1da177e4
LT		 673 tty_flip_buffer_push(tty);
674
675 /* again lockless, but debug info only */
676 priv->bytes_in += bytes_sent;
677 }
678 /* Continue trying to always read */
679 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
680 usb_rcvbulkpipe(port->serial->dev,
681 port->bulk_in_endpointAddress),
682 port->read_urb->transfer_buffer,
683 port->read_urb->transfer_buffer_length,
684 klsi_105_read_bulk_callback,
685 port);
686 rc = usb_submit_urb(port->read_urb, GFP_ATOMIC);
687 if (rc)
688 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, rc);
689} /* klsi_105_read_bulk_callback */
690
691
692static void klsi_105_set_termios (struct usb_serial_port *port,
693 struct termios *old_termios)
694{
695 struct klsi_105_private *priv = usb_get_serial_port_data(port);
696 unsigned int iflag = port->tty->termios->c_iflag;
697 unsigned int old_iflag = old_termios->c_iflag;
698 unsigned int cflag = port->tty->termios->c_cflag;
699 unsigned int old_cflag = old_termios->c_cflag;
700 struct klsi_105_port_settings cfg;
701 unsigned long flags;
702
703 /* lock while we are modifying the settings */
704 spin_lock_irqsave (&priv->lock, flags);
705
706 /*
707 * Update baud rate
708 */
709 if( (cflag & CBAUD) != (old_cflag & CBAUD) ) {
710 /* reassert DTR and (maybe) RTS on transition from B0 */
711 if( (old_cflag & CBAUD) == B0 ) {
712 dbg("%s: baud was B0", __FUNCTION__);
713#if 0
714 priv->control_state |= TIOCM_DTR;
715 /* don't set RTS if using hardware flow control */
716 if (!(old_cflag & CRTSCTS)) {
717 priv->control_state |= TIOCM_RTS;
718 }
719 mct_u232_set_modem_ctrl(serial, priv->control_state);
720#endif
721 }
722
723 switch(cflag & CBAUD) {
724 case B0: /* handled below */
725 break;
726 case B1200: priv->cfg.baudrate = kl5kusb105a_sio_b1200;
727 break;
728 case B2400: priv->cfg.baudrate = kl5kusb105a_sio_b2400;
729 break;
730 case B4800: priv->cfg.baudrate = kl5kusb105a_sio_b4800;
731 break;
732 case B9600: priv->cfg.baudrate = kl5kusb105a_sio_b9600;
733 break;
734 case B19200: priv->cfg.baudrate = kl5kusb105a_sio_b19200;
735 break;
736 case B38400: priv->cfg.baudrate = kl5kusb105a_sio_b38400;
737 break;
738 case B57600: priv->cfg.baudrate = kl5kusb105a_sio_b57600;
739 break;
740 case B115200: priv->cfg.baudrate = kl5kusb105a_sio_b115200;
741 break;
742 default:
743 err("KLSI USB->Serial converter:"
744 " unsupported baudrate request, using default"
745 " of 9600");
746 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
747 break;
748 }
749 if ((cflag & CBAUD) == B0 ) {
750 dbg("%s: baud is B0", __FUNCTION__);
751 /* Drop RTS and DTR */
752 /* maybe this should be simulated by sending read
753 * disable and read enable messages?
754 */
755 ;
756#if 0
757 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
758 mct_u232_set_modem_ctrl(serial, priv->control_state);
759#endif
760 }
761 }
762
763 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
764 /* set the number of data bits */
765 switch (cflag & CSIZE) {
766 case CS5:
767 dbg("%s - 5 bits/byte not supported", __FUNCTION__);
768 spin_unlock_irqrestore (&priv->lock, flags);
769 return ;
770 case CS6:
771 dbg("%s - 6 bits/byte not supported", __FUNCTION__);
772 spin_unlock_irqrestore (&priv->lock, flags);
773 return ;
774 case CS7:
775 priv->cfg.databits = kl5kusb105a_dtb_7;
776 break;
777 case CS8:
778 priv->cfg.databits = kl5kusb105a_dtb_8;
779 break;
780 default:
781 err("CSIZE was not CS5-CS8, using default of 8");
782 priv->cfg.databits = kl5kusb105a_dtb_8;
783 break;
784 }
785 }
786
787 /*
788 * Update line control register (LCR)
789 */
790 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
791 || (cflag & CSTOPB) != (old_cflag & CSTOPB) ) {
792
793#if 0
794 priv->last_lcr = 0;
795
796 /* set the parity */
797 if (cflag & PARENB)
798 priv->last_lcr |= (cflag & PARODD) ?
799 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
800 else
801 priv->last_lcr |= MCT_U232_PARITY_NONE;
802
803 /* set the number of stop bits */
804 priv->last_lcr |= (cflag & CSTOPB) ?
805 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
806
807 mct_u232_set_line_ctrl(serial, priv->last_lcr);
808#endif
809 ;
810 }
811
812 /*
813 * Set flow control: well, I do not really now how to handle DTR/RTS.
814 * Just do what we have seen with SniffUSB on Win98.
815 */
816 if( (iflag & IXOFF) != (old_iflag & IXOFF)
817 || (iflag & IXON) != (old_iflag & IXON)
818 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS) ) {
819
820 /* Drop DTR/RTS if no flow control otherwise assert */
821#if 0
822 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS) )
823 priv->control_state |= TIOCM_DTR | TIOCM_RTS;
824 else
825 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
826 mct_u232_set_modem_ctrl(serial, priv->control_state);
827#endif
828 ;
829 }
830 memcpy (&cfg, &priv->cfg, sizeof(cfg));
831 spin_unlock_irqrestore (&priv->lock, flags);
832
833 /* now commit changes to device */
834 klsi_105_chg_port_settings(port, &cfg);
835} /* klsi_105_set_termios */
836
837
838#if 0
839static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state )
840{
841 struct usb_serial *serial = port->serial;
842 struct mct_u232_private *priv = (struct mct_u232_private *)port->private;
843 unsigned char lcr = priv->last_lcr;
844
845 dbg("%sstate=%d", __FUNCTION__, break_state);
846
847 if (break_state)
848 lcr |= MCT_U232_SET_BREAK;
849
850 mct_u232_set_line_ctrl(serial, lcr);
851} /* mct_u232_break_ctl */
852#endif
853
854static int klsi_105_tiocmget (struct usb_serial_port *port, struct file *file)
855{
856 struct klsi_105_private *priv = usb_get_serial_port_data(port);
857 unsigned long flags;
858 int rc;
859 unsigned long line_state;
860 dbg("%s - request, just guessing", __FUNCTION__);
861
862 rc = klsi_105_get_line_state(port, &line_state);
863 if (rc < 0) {
864 err("Reading line control failed (error = %d)", rc);
865 /* better return value? EAGAIN? */
866 return rc;
867 }
868
869 spin_lock_irqsave (&priv->lock, flags);
870 priv->line_state = line_state;
871 spin_unlock_irqrestore (&priv->lock, flags);
872 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state);
873 return (int)line_state;
874}
875
876static int klsi_105_tiocmset (struct usb_serial_port *port, struct file *file,
877 unsigned int set, unsigned int clear)
878{
879 int retval = -EINVAL;
880
881 dbg("%s", __FUNCTION__);
882
883/* if this ever gets implemented, it should be done something like this:
884 struct usb_serial *serial = port->serial;
885 struct klsi_105_private *priv = usb_get_serial_port_data(port);
886 unsigned long flags;
887 int control;
888
889 spin_lock_irqsave (&priv->lock, flags);
890 if (set & TIOCM_RTS)
891 priv->control_state |= TIOCM_RTS;
892 if (set & TIOCM_DTR)
893 priv->control_state |= TIOCM_DTR;
894 if (clear & TIOCM_RTS)
895 priv->control_state &= ~TIOCM_RTS;
896 if (clear & TIOCM_DTR)
897 priv->control_state &= ~TIOCM_DTR;
898 control = priv->control_state;
899 spin_unlock_irqrestore (&priv->lock, flags);
900 retval = mct_u232_set_modem_ctrl(serial, control);
901*/
902 return retval;
903}
904
905static int klsi_105_ioctl (struct usb_serial_port *port, struct file * file,
906 unsigned int cmd, unsigned long arg)
907{
908 struct klsi_105_private *priv = usb_get_serial_port_data(port);
909 void __user *user_arg = (void __user *)arg;
910
911 dbg("%scmd=0x%x", __FUNCTION__, cmd);
912
913 /* Based on code from acm.c and others */
914 switch (cmd) {
915 case TIOCMIWAIT:
916 /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/
917 /* TODO */
918 dbg("%s - TIOCMIWAIT not handled", __FUNCTION__);
919 return -ENOIOCTLCMD;
920 case TIOCGICOUNT:
921 /* return count of modemline transitions */
922 /* TODO */
923 dbg("%s - TIOCGICOUNT not handled", __FUNCTION__);
924 return -ENOIOCTLCMD;
925 case TCGETS:
926 /* return current info to caller */
927 dbg("%s - TCGETS data faked/incomplete", __FUNCTION__);
928
929 if (!access_ok(VERIFY_WRITE, user_arg, sizeof(struct termios)))
930 return -EFAULT;
931
932 if (kernel_termios_to_user_termios((struct termios __user *)arg,
933 &priv->termios))
934 return -EFAULT;
935 return 0;
936 case TCSETS:
937 /* set port termios to the one given by the user */
938 dbg("%s - TCSETS not handled", __FUNCTION__);
939
940 if (!access_ok(VERIFY_READ, user_arg, sizeof(struct termios)))
941 return -EFAULT;
942
943 if (user_termios_to_kernel_termios(&priv->termios,
944 (struct termios __user *)arg))
945 return -EFAULT;
946 klsi_105_set_termios(port, &priv->termios);
947 return 0;
948 case TCSETSW: {
949 /* set port termios and try to wait for completion of last
950 * write operation */
951 /* We guess here. If there are not too many write urbs
952 * outstanding, we lie. */
953 /* what is the right way to wait here? schedule() ? */
954 /*
955 while (klsi_105_chars_in_buffer(port) > (NUM_URBS / 4 ) * URB_TRANSFER_BUFFER_SIZE)
956 schedule();
957 */
958 return -ENOIOCTLCMD;
959 }
960 default:
961 dbg("%s: arg not supported - 0x%04x", __FUNCTION__,cmd);
962 return(-ENOIOCTLCMD);
963 break;
964 }
965 return 0;
966} /* klsi_105_ioctl */
967
968static void klsi_105_throttle (struct usb_serial_port *port)
969{
970 dbg("%s - port %d", __FUNCTION__, port->number);
971 usb_kill_urb(port->read_urb);
972}
973
974static void klsi_105_unthrottle (struct usb_serial_port *port)
975{
976 int result;
977
978 dbg("%s - port %d", __FUNCTION__, port->number);
979
980 port->read_urb->dev = port->serial->dev;
981 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
982 if (result)
983 err("%s - failed submitting read urb, error %d", __FUNCTION__,
984 result);
985}
986
987
988
989static 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 info(DRIVER_DESC " " DRIVER_VERSION);
1000 return 0;
1001failed_usb_register:
1002 usb_serial_deregister(&kl5kusb105d_device);
1003failed_usb_serial_register:
1004 return retval;
1005}
1006
1007
1008static void __exit klsi_105_exit (void)
1009{
1010 usb_deregister (&kl5kusb105d_driver);
1011 usb_serial_deregister (&kl5kusb105d_device);
1012}
1013
1014
1015module_init (klsi_105_init);
1016module_exit (klsi_105_exit);
1017
1018MODULE_AUTHOR( DRIVER_AUTHOR );
1019MODULE_DESCRIPTION( DRIVER_DESC );
1020MODULE_LICENSE("GPL");
1021
1022
1023module_param(debug, bool, S_IRUGO | S_IWUSR);
1024MODULE_PARM_DESC(debug, "enable extensive debugging messages");
1025
1026/* vim: set sts=8 ts=8 sw=8: */
Linux kernel - Deliverables
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