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Diffstat (limited to 'drivers/usb/serial/kl5kusb105.c')
-rw-r--r--drivers/usb/serial/kl5kusb105.c1034
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diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c
new file mode 100644
index 000000000000..49c602a0b4df
--- /dev/null
+++ b/drivers/usb/serial/kl5kusb105.c
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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 = {
119 .owner = THIS_MODULE,
120 .name = "kl5kusb105d",
121 .probe = usb_serial_probe,
122 .disconnect = usb_serial_disconnect,
123 .id_table = id_table,
124};
125
126static struct usb_serial_device_type kl5kusb105d_device = {
127 .owner = THIS_MODULE,
128 .name = "KL5KUSB105D / PalmConnect",
129 .short_name = "kl5kusb105d",
130 .id_table = id_table,
131 .num_interrupt_in = 1,
132 .num_bulk_in = 1,
133 .num_bulk_out = 1,
134 .num_ports = 1,
135 .open = klsi_105_open,
136 .close = klsi_105_close,
137 .write = klsi_105_write,
138 .write_bulk_callback = klsi_105_write_bulk_callback,
139 .chars_in_buffer = klsi_105_chars_in_buffer,
140 .write_room = klsi_105_write_room,
141 .read_bulk_callback =klsi_105_read_bulk_callback,
142 .ioctl = klsi_105_ioctl,
143 .set_termios = klsi_105_set_termios,
144 /*.break_ctl = klsi_105_break_ctl,*/
145 .tiocmget = klsi_105_tiocmget,
146 .tiocmset = klsi_105_tiocmset,
147 .attach = klsi_105_startup,
148 .shutdown = klsi_105_shutdown,
149 .throttle = klsi_105_throttle,
150 .unthrottle = klsi_105_unthrottle,
151};
152
153struct klsi_105_port_settings {
154 __u8 pktlen; /* always 5, it seems */
155 __u8 baudrate;
156 __u8 databits;
157 __u8 unknown1;
158 __u8 unknown2;
159} __attribute__ ((packed));
160
161/* we implement a pool of NUM_URBS urbs per usb_serial */
162#define NUM_URBS 1
163#define URB_TRANSFER_BUFFER_SIZE 64
164struct klsi_105_private {
165 struct klsi_105_port_settings cfg;
166 struct termios termios;
167 unsigned long line_state; /* modem line settings */
168 /* write pool */
169 struct urb * write_urb_pool[NUM_URBS];
170 spinlock_t lock;
171 unsigned long bytes_in;
172 unsigned long bytes_out;
173};
174
175
176/*
177 * Handle vendor specific USB requests
178 */
179
180
181#define KLSI_TIMEOUT 5000 /* default urb timeout */
182
183static int klsi_105_chg_port_settings(struct usb_serial_port *port,
184 struct klsi_105_port_settings *settings)
185{
186 int rc;
187
188 rc = usb_control_msg(port->serial->dev,
189 usb_sndctrlpipe(port->serial->dev, 0),
190 KL5KUSB105A_SIO_SET_DATA,
191 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE,
192 0, /* value */
193 0, /* index */
194 settings,
195 sizeof(struct klsi_105_port_settings),
196 KLSI_TIMEOUT);
197 if (rc < 0)
198 err("Change port settings failed (error = %d)", rc);
199 info("%s - %d byte block, baudrate %x, databits %d, u1 %d, u2 %d",
200 __FUNCTION__,
201 settings->pktlen,
202 settings->baudrate, settings->databits,
203 settings->unknown1, settings->unknown2);
204 return rc;
205} /* klsi_105_chg_port_settings */
206
207/* translate a 16-bit status value from the device to linux's TIO bits */
208static unsigned long klsi_105_status2linestate(const __u16 status)
209{
210 unsigned long res = 0;
211
212 res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0)
213 | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0)
214 ;
215
216 return res;
217}
218/*
219 * Read line control via vendor command and return result through
220 * *line_state_p
221 */
222/* It seems that the status buffer has always only 2 bytes length */
223#define KLSI_STATUSBUF_LEN 2
224static int klsi_105_get_line_state(struct usb_serial_port *port,
225 unsigned long *line_state_p)
226{
227 int rc;
228 __u8 status_buf[KLSI_STATUSBUF_LEN] = { -1,-1};
229 __u16 status;
230
231 info("%s - sending SIO Poll request", __FUNCTION__);
232 rc = usb_control_msg(port->serial->dev,
233 usb_rcvctrlpipe(port->serial->dev, 0),
234 KL5KUSB105A_SIO_POLL,
235 USB_TYPE_VENDOR | USB_DIR_IN,
236 0, /* value */
237 0, /* index */
238 status_buf, KLSI_STATUSBUF_LEN,
239 10000
240 );
241 if (rc < 0)
242 err("Reading line status failed (error = %d)", rc);
243 else {
244 status = status_buf[0] + (status_buf[1]<<8);
245
246 info("%s - read status %x %x", __FUNCTION__,
247 status_buf[0], status_buf[1]);
248
249 *line_state_p = klsi_105_status2linestate(status);
250 }
251
252 return rc;
253}
254
255
256/*
257 * Driver's tty interface functions
258 */
259
260static int klsi_105_startup (struct usb_serial *serial)
261{
262 struct klsi_105_private *priv;
263 int i;
264
265 /* check if we support the product id (see keyspan.c)
266 * FIXME
267 */
268
269 /* allocate the private data structure */
270 for (i=0; i<serial->num_ports; i++) {
271 int j;
272 priv = kmalloc(sizeof(struct klsi_105_private),
273 GFP_KERNEL);
274 if (!priv) {
275 dbg("%skmalloc for klsi_105_private failed.", __FUNCTION__);
276 return -ENOMEM;
277 }
278 /* set initial values for control structures */
279 priv->cfg.pktlen = 5;
280 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
281 priv->cfg.databits = kl5kusb105a_dtb_8;
282 priv->cfg.unknown1 = 0;
283 priv->cfg.unknown2 = 1;
284
285 priv->line_state = 0;
286
287 priv->bytes_in = 0;
288 priv->bytes_out = 0;
289 usb_set_serial_port_data(serial->port[i], priv);
290
291 spin_lock_init (&priv->lock);
292 for (j=0; j<NUM_URBS; j++) {
293 struct urb* urb = usb_alloc_urb(0, GFP_KERNEL);
294
295 priv->write_urb_pool[j] = urb;
296 if (urb == NULL) {
297 err("No more urbs???");
298 continue;
299 }
300
301 urb->transfer_buffer = NULL;
302 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE,
303 GFP_KERNEL);
304 if (!urb->transfer_buffer) {
305 err("%s - out of memory for urb buffers.", __FUNCTION__);
306 continue;
307 }
308 }
309
310 /* priv->termios is left uninitalized until port opening */
311 init_waitqueue_head(&serial->port[i]->write_wait);
312 }
313
314 return (0);
315} /* klsi_105_startup */
316
317
318static void klsi_105_shutdown (struct usb_serial *serial)
319{
320 int i;
321
322 dbg("%s", __FUNCTION__);
323
324 /* stop reads and writes on all ports */
325 for (i=0; i < serial->num_ports; ++i) {
326 struct klsi_105_private *priv = usb_get_serial_port_data(serial->port[i]);
327 unsigned long flags;
328
329 if (priv) {
330 /* kill our write urb pool */
331 int j;
332 struct urb **write_urbs = priv->write_urb_pool;
333 spin_lock_irqsave(&priv->lock,flags);
334
335 for (j = 0; j < NUM_URBS; j++) {
336 if (write_urbs[j]) {
337 /* FIXME - uncomment the following
338 * usb_kill_urb call when the host
339 * controllers get fixed to set
340 * urb->dev = NULL after the urb is
341 * finished. Otherwise this call
342 * oopses. */
343 /* usb_kill_urb(write_urbs[j]); */
344 if (write_urbs[j]->transfer_buffer)
345 kfree(write_urbs[j]->transfer_buffer);
346 usb_free_urb (write_urbs[j]);
347 }
348 }
349
350 spin_unlock_irqrestore (&priv->lock, flags);
351
352 kfree(priv);
353 usb_set_serial_port_data(serial->port[i], NULL);
354 }
355 }
356} /* klsi_105_shutdown */
357
358static int klsi_105_open (struct usb_serial_port *port, struct file *filp)
359{
360 struct klsi_105_private *priv = usb_get_serial_port_data(port);
361 int retval = 0;
362 int rc;
363 int i;
364 unsigned long line_state;
365 struct klsi_105_port_settings cfg;
366 unsigned long flags;
367
368 dbg("%s port %d", __FUNCTION__, port->number);
369
370 /* force low_latency on so that our tty_push actually forces
371 * the data through
372 * port->tty->low_latency = 1; */
373
374 /* Do a defined restart:
375 * Set up sane default baud rate and send the 'READ_ON'
376 * vendor command.
377 * FIXME: set modem line control (how?)
378 * Then read the modem line control and store values in
379 * priv->line_state.
380 */
381 cfg.pktlen = 5;
382 cfg.baudrate = kl5kusb105a_sio_b9600;
383 cfg.databits = kl5kusb105a_dtb_8;
384 cfg.unknown1 = 0;
385 cfg.unknown2 = 1;
386 klsi_105_chg_port_settings(port, &cfg);
387
388 /* set up termios structure */
389 spin_lock_irqsave (&priv->lock, flags);
390 priv->termios.c_iflag = port->tty->termios->c_iflag;
391 priv->termios.c_oflag = port->tty->termios->c_oflag;
392 priv->termios.c_cflag = port->tty->termios->c_cflag;
393 priv->termios.c_lflag = port->tty->termios->c_lflag;
394 for (i=0; i<NCCS; i++)
395 priv->termios.c_cc[i] = port->tty->termios->c_cc[i];
396 priv->cfg.pktlen = cfg.pktlen;
397 priv->cfg.baudrate = cfg.baudrate;
398 priv->cfg.databits = cfg.databits;
399 priv->cfg.unknown1 = cfg.unknown1;
400 priv->cfg.unknown2 = cfg.unknown2;
401 spin_unlock_irqrestore (&priv->lock, flags);
402
403 /* READ_ON and urb submission */
404 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
405 usb_rcvbulkpipe(port->serial->dev,
406 port->bulk_in_endpointAddress),
407 port->read_urb->transfer_buffer,
408 port->read_urb->transfer_buffer_length,
409 klsi_105_read_bulk_callback,
410 port);
411
412 rc = usb_submit_urb(port->read_urb, GFP_KERNEL);
413 if (rc) {
414 err("%s - failed submitting read urb, error %d", __FUNCTION__, rc);
415 retval = rc;
416 goto exit;
417 }
418
419 rc = usb_control_msg(port->serial->dev,
420 usb_sndctrlpipe(port->serial->dev,0),
421 KL5KUSB105A_SIO_CONFIGURE,
422 USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
423 KL5KUSB105A_SIO_CONFIGURE_READ_ON,
424 0, /* index */
425 NULL,
426 0,
427 KLSI_TIMEOUT);
428 if (rc < 0) {
429 err("Enabling read failed (error = %d)", rc);
430 retval = rc;
431 } else
432 dbg("%s - enabled reading", __FUNCTION__);
433
434 rc = klsi_105_get_line_state(port, &line_state);
435 if (rc >= 0) {
436 spin_lock_irqsave (&priv->lock, flags);
437 priv->line_state = line_state;
438 spin_unlock_irqrestore (&priv->lock, flags);
439 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state);
440 retval = 0;
441 } else
442 retval = rc;
443
444exit:
445 return retval;
446} /* klsi_105_open */
447
448
449static void klsi_105_close (struct usb_serial_port *port, struct file *filp)
450{
451 struct klsi_105_private *priv = usb_get_serial_port_data(port);
452 int rc;
453
454 dbg("%s port %d", __FUNCTION__, port->number);
455
456 /* send READ_OFF */
457 rc = usb_control_msg (port->serial->dev,
458 usb_sndctrlpipe(port->serial->dev, 0),
459 KL5KUSB105A_SIO_CONFIGURE,
460 USB_TYPE_VENDOR | USB_DIR_OUT,
461 KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
462 0, /* index */
463 NULL, 0,
464 KLSI_TIMEOUT);
465 if (rc < 0)
466 err("Disabling read failed (error = %d)", rc);
467
468 /* shutdown our bulk reads and writes */
469 usb_kill_urb(port->write_urb);
470 usb_kill_urb(port->read_urb);
471 /* unlink our write pool */
472 /* FIXME */
473 /* wgg - do I need this? I think so. */
474 usb_kill_urb(port->interrupt_in_urb);
475 info("kl5kusb105 port stats: %ld bytes in, %ld bytes out", priv->bytes_in, priv->bytes_out);
476} /* klsi_105_close */
477
478
479/* We need to write a complete 64-byte data block and encode the
480 * number actually sent in the first double-byte, LSB-order. That
481 * leaves at most 62 bytes of payload.
482 */
483#define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */
484
485
486static int klsi_105_write (struct usb_serial_port *port,
487 const unsigned char *buf, int count)
488{
489 struct klsi_105_private *priv = usb_get_serial_port_data(port);
490 int result, size;
491 int bytes_sent=0;
492
493 dbg("%s - port %d", __FUNCTION__, port->number);
494
495 while (count > 0) {
496 /* try to find a free urb (write 0 bytes if none) */
497 struct urb *urb = NULL;
498 unsigned long flags;
499 int i;
500 /* since the pool is per-port we might not need the spin lock !? */
501 spin_lock_irqsave (&priv->lock, flags);
502 for (i=0; i<NUM_URBS; i++) {
503 if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
504 urb = priv->write_urb_pool[i];
505 dbg("%s - using pool URB %d", __FUNCTION__, i);
506 break;
507 }
508 }
509 spin_unlock_irqrestore (&priv->lock, flags);
510
511 if (urb==NULL) {
512 dbg("%s - no more free urbs", __FUNCTION__);
513 goto exit;
514 }
515
516 if (urb->transfer_buffer == NULL) {
517 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
518 if (urb->transfer_buffer == NULL) {
519 err("%s - no more kernel memory...", __FUNCTION__);
520 goto exit;
521 }
522 }
523
524 size = min (count, port->bulk_out_size - KLSI_105_DATA_OFFSET);
525 size = min (size, URB_TRANSFER_BUFFER_SIZE - KLSI_105_DATA_OFFSET);
526
527 memcpy (urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size);
528
529 /* write payload size into transfer buffer */
530 ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF);
531 ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8);
532
533 /* set up our urb */
534 usb_fill_bulk_urb(urb, port->serial->dev,
535 usb_sndbulkpipe(port->serial->dev,
536 port->bulk_out_endpointAddress),
537 urb->transfer_buffer,
538 URB_TRANSFER_BUFFER_SIZE,
539 klsi_105_write_bulk_callback,
540 port);
541
542 /* send the data out the bulk port */
543 result = usb_submit_urb(urb, GFP_ATOMIC);
544 if (result) {
545 err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
546 goto exit;
547 }
548 buf += size;
549 bytes_sent += size;
550 count -= size;
551 }
552exit:
553 /* lockless, but it's for debug info only... */
554 priv->bytes_out+=bytes_sent;
555
556 return bytes_sent; /* that's how much we wrote */
557} /* klsi_105_write */
558
559static void klsi_105_write_bulk_callback ( struct urb *urb, struct pt_regs *regs)
560{
561 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
562
563 dbg("%s - port %d", __FUNCTION__, port->number);
564
565 if (urb->status) {
566 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__,
567 urb->status);
568 return;
569 }
570
571 /* from generic_write_bulk_callback */
572 schedule_work(&port->work);
573} /* klsi_105_write_bulk_completion_callback */
574
575
576/* return number of characters currently in the writing process */
577static int klsi_105_chars_in_buffer (struct usb_serial_port *port)
578{
579 int chars = 0;
580 int i;
581 unsigned long flags;
582 struct klsi_105_private *priv = usb_get_serial_port_data(port);
583
584 spin_lock_irqsave (&priv->lock, flags);
585
586 for (i = 0; i < NUM_URBS; ++i) {
587 if (priv->write_urb_pool[i]->status == -EINPROGRESS) {
588 chars += URB_TRANSFER_BUFFER_SIZE;
589 }
590 }
591
592 spin_unlock_irqrestore (&priv->lock, flags);
593
594 dbg("%s - returns %d", __FUNCTION__, chars);
595 return (chars);
596}
597
598static int klsi_105_write_room (struct usb_serial_port *port)
599{
600 unsigned long flags;
601 int i;
602 int room = 0;
603 struct klsi_105_private *priv = usb_get_serial_port_data(port);
604
605 spin_lock_irqsave (&priv->lock, flags);
606 for (i = 0; i < NUM_URBS; ++i) {
607 if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
608 room += URB_TRANSFER_BUFFER_SIZE;
609 }
610 }
611
612 spin_unlock_irqrestore (&priv->lock, flags);
613
614 dbg("%s - returns %d", __FUNCTION__, room);
615 return (room);
616}
617
618
619
620static void klsi_105_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
621{
622 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
623 struct klsi_105_private *priv = usb_get_serial_port_data(port);
624 struct tty_struct *tty;
625 unsigned char *data = urb->transfer_buffer;
626 int rc;
627
628 dbg("%s - port %d", __FUNCTION__, port->number);
629
630 /* The urb might have been killed. */
631 if (urb->status) {
632 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__,
633 urb->status);
634 return;
635 }
636
637 /* The data received is again preceded by a length double-byte in LSB-
638 * first order (see klsi_105_write() )
639 */
640 if (urb->actual_length == 0) {
641 /* empty urbs seem to happen, we ignore them */
642 /* dbg("%s - emtpy URB", __FUNCTION__); */
643 ;
644 } else if (urb->actual_length <= 2) {
645 dbg("%s - size %d URB not understood", __FUNCTION__,
646 urb->actual_length);
647 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
648 urb->actual_length, data);
649 } else {
650 int i;
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
671 for (i = 2; i < 2+bytes_sent; i++) {
672 /* if we insert more than TTY_FLIPBUF_SIZE characters,
673 * we drop them. */
674 if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
675 tty_flip_buffer_push(tty);
676 }
677 /* this doesn't actually push the data through unless
678 * tty->low_latency is set */
679 tty_insert_flip_char(tty, ((__u8*) data)[i], 0);
680 }
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
700static void klsi_105_set_termios (struct usb_serial_port *port,
701 struct termios *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(cflag & CBAUD) {
732 case B0: /* handled below */
733 break;
734 case B1200: priv->cfg.baudrate = kl5kusb105a_sio_b1200;
735 break;
736 case B2400: priv->cfg.baudrate = kl5kusb105a_sio_b2400;
737 break;
738 case B4800: priv->cfg.baudrate = kl5kusb105a_sio_b4800;
739 break;
740 case B9600: priv->cfg.baudrate = kl5kusb105a_sio_b9600;
741 break;
742 case B19200: priv->cfg.baudrate = kl5kusb105a_sio_b19200;
743 break;
744 case B38400: priv->cfg.baudrate = kl5kusb105a_sio_b38400;
745 break;
746 case B57600: priv->cfg.baudrate = kl5kusb105a_sio_b57600;
747 break;
748 case B115200: priv->cfg.baudrate = kl5kusb105a_sio_b115200;
749 break;
750 default:
751 err("KLSI USB->Serial converter:"
752 " unsupported baudrate request, using default"
753 " of 9600");
754 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
755 break;
756 }
757 if ((cflag & CBAUD) == B0 ) {
758 dbg("%s: baud is B0", __FUNCTION__);
759 /* Drop RTS and DTR */
760 /* maybe this should be simulated by sending read
761 * disable and read enable messages?
762 */
763 ;
764#if 0
765 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
766 mct_u232_set_modem_ctrl(serial, priv->control_state);
767#endif
768 }
769 }
770
771 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
772 /* set the number of data bits */
773 switch (cflag & CSIZE) {
774 case CS5:
775 dbg("%s - 5 bits/byte not supported", __FUNCTION__);
776 spin_unlock_irqrestore (&priv->lock, flags);
777 return ;
778 case CS6:
779 dbg("%s - 6 bits/byte not supported", __FUNCTION__);
780 spin_unlock_irqrestore (&priv->lock, flags);
781 return ;
782 case CS7:
783 priv->cfg.databits = kl5kusb105a_dtb_7;
784 break;
785 case CS8:
786 priv->cfg.databits = kl5kusb105a_dtb_8;
787 break;
788 default:
789 err("CSIZE was not CS5-CS8, using default of 8");
790 priv->cfg.databits = kl5kusb105a_dtb_8;
791 break;
792 }
793 }
794
795 /*
796 * Update line control register (LCR)
797 */
798 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
799 || (cflag & CSTOPB) != (old_cflag & CSTOPB) ) {
800
801#if 0
802 priv->last_lcr = 0;
803
804 /* set the parity */
805 if (cflag & PARENB)
806 priv->last_lcr |= (cflag & PARODD) ?
807 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
808 else
809 priv->last_lcr |= MCT_U232_PARITY_NONE;
810
811 /* set the number of stop bits */
812 priv->last_lcr |= (cflag & CSTOPB) ?
813 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
814
815 mct_u232_set_line_ctrl(serial, priv->last_lcr);
816#endif
817 ;
818 }
819
820 /*
821 * Set flow control: well, I do not really now how to handle DTR/RTS.
822 * Just do what we have seen with SniffUSB on Win98.
823 */
824 if( (iflag & IXOFF) != (old_iflag & IXOFF)
825 || (iflag & IXON) != (old_iflag & IXON)
826 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS) ) {
827
828 /* Drop DTR/RTS if no flow control otherwise assert */
829#if 0
830 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS) )
831 priv->control_state |= TIOCM_DTR | TIOCM_RTS;
832 else
833 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
834 mct_u232_set_modem_ctrl(serial, priv->control_state);
835#endif
836 ;
837 }
838 memcpy (&cfg, &priv->cfg, sizeof(cfg));
839 spin_unlock_irqrestore (&priv->lock, flags);
840
841 /* now commit changes to device */
842 klsi_105_chg_port_settings(port, &cfg);
843} /* klsi_105_set_termios */
844
845
846#if 0
847static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state )
848{
849 struct usb_serial *serial = port->serial;
850 struct mct_u232_private *priv = (struct mct_u232_private *)port->private;
851 unsigned char lcr = priv->last_lcr;
852
853 dbg("%sstate=%d", __FUNCTION__, break_state);
854
855 if (break_state)
856 lcr |= MCT_U232_SET_BREAK;
857
858 mct_u232_set_line_ctrl(serial, lcr);
859} /* mct_u232_break_ctl */
860#endif
861
862static int klsi_105_tiocmget (struct usb_serial_port *port, struct file *file)
863{
864 struct klsi_105_private *priv = usb_get_serial_port_data(port);
865 unsigned long flags;
866 int rc;
867 unsigned long line_state;
868 dbg("%s - request, just guessing", __FUNCTION__);
869
870 rc = klsi_105_get_line_state(port, &line_state);
871 if (rc < 0) {
872 err("Reading line control failed (error = %d)", rc);
873 /* better return value? EAGAIN? */
874 return rc;
875 }
876
877 spin_lock_irqsave (&priv->lock, flags);
878 priv->line_state = line_state;
879 spin_unlock_irqrestore (&priv->lock, flags);
880 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state);
881 return (int)line_state;
882}
883
884static int klsi_105_tiocmset (struct usb_serial_port *port, struct file *file,
885 unsigned int set, unsigned int clear)
886{
887 int retval = -EINVAL;
888
889 dbg("%s", __FUNCTION__);
890
891/* if this ever gets implemented, it should be done something like this:
892 struct usb_serial *serial = port->serial;
893 struct klsi_105_private *priv = usb_get_serial_port_data(port);
894 unsigned long flags;
895 int control;
896
897 spin_lock_irqsave (&priv->lock, flags);
898 if (set & TIOCM_RTS)
899 priv->control_state |= TIOCM_RTS;
900 if (set & TIOCM_DTR)
901 priv->control_state |= TIOCM_DTR;
902 if (clear & TIOCM_RTS)
903 priv->control_state &= ~TIOCM_RTS;
904 if (clear & TIOCM_DTR)
905 priv->control_state &= ~TIOCM_DTR;
906 control = priv->control_state;
907 spin_unlock_irqrestore (&priv->lock, flags);
908 retval = mct_u232_set_modem_ctrl(serial, control);
909*/
910 return retval;
911}
912
913static int klsi_105_ioctl (struct usb_serial_port *port, struct file * file,
914 unsigned int cmd, unsigned long arg)
915{
916 struct klsi_105_private *priv = usb_get_serial_port_data(port);
917 void __user *user_arg = (void __user *)arg;
918
919 dbg("%scmd=0x%x", __FUNCTION__, cmd);
920
921 /* Based on code from acm.c and others */
922 switch (cmd) {
923 case TIOCMIWAIT:
924 /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/
925 /* TODO */
926 dbg("%s - TIOCMIWAIT not handled", __FUNCTION__);
927 return -ENOIOCTLCMD;
928 case TIOCGICOUNT:
929 /* return count of modemline transitions */
930 /* TODO */
931 dbg("%s - TIOCGICOUNT not handled", __FUNCTION__);
932 return -ENOIOCTLCMD;
933 case TCGETS:
934 /* return current info to caller */
935 dbg("%s - TCGETS data faked/incomplete", __FUNCTION__);
936
937 if (!access_ok(VERIFY_WRITE, user_arg, sizeof(struct termios)))
938 return -EFAULT;
939
940 if (kernel_termios_to_user_termios((struct termios __user *)arg,
941 &priv->termios))
942 return -EFAULT;
943 return 0;
944 case TCSETS:
945 /* set port termios to the one given by the user */
946 dbg("%s - TCSETS not handled", __FUNCTION__);
947
948 if (!access_ok(VERIFY_READ, user_arg, sizeof(struct termios)))
949 return -EFAULT;
950
951 if (user_termios_to_kernel_termios(&priv->termios,
952 (struct termios __user *)arg))
953 return -EFAULT;
954 klsi_105_set_termios(port, &priv->termios);
955 return 0;
956 case TCSETSW: {
957 /* set port termios and try to wait for completion of last
958 * write operation */
959 /* We guess here. If there are not too many write urbs
960 * outstanding, we lie. */
961 /* what is the right way to wait here? schedule() ? */
962 /*
963 while (klsi_105_chars_in_buffer(port) > (NUM_URBS / 4 ) * URB_TRANSFER_BUFFER_SIZE)
964 schedule();
965 */
966 return -ENOIOCTLCMD;
967 }
968 default:
969 dbg("%s: arg not supported - 0x%04x", __FUNCTION__,cmd);
970 return(-ENOIOCTLCMD);
971 break;
972 }
973 return 0;
974} /* klsi_105_ioctl */
975
976static void klsi_105_throttle (struct usb_serial_port *port)
977{
978 dbg("%s - port %d", __FUNCTION__, port->number);
979 usb_kill_urb(port->read_urb);
980}
981
982static void klsi_105_unthrottle (struct usb_serial_port *port)
983{
984 int result;
985
986 dbg("%s - port %d", __FUNCTION__, port->number);
987
988 port->read_urb->dev = port->serial->dev;
989 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
990 if (result)
991 err("%s - failed submitting read urb, error %d", __FUNCTION__,
992 result);
993}
994
995
996
997static int __init klsi_105_init (void)
998{
999 int retval;
1000 retval = usb_serial_register(&kl5kusb105d_device);
1001 if (retval)
1002 goto failed_usb_serial_register;
1003 retval = usb_register(&kl5kusb105d_driver);
1004 if (retval)
1005 goto failed_usb_register;
1006
1007 info(DRIVER_DESC " " DRIVER_VERSION);
1008 return 0;
1009failed_usb_register:
1010 usb_serial_deregister(&kl5kusb105d_device);
1011failed_usb_serial_register:
1012 return retval;
1013}
1014
1015
1016static void __exit klsi_105_exit (void)
1017{
1018 usb_deregister (&kl5kusb105d_driver);
1019 usb_serial_deregister (&kl5kusb105d_device);
1020}
1021
1022
1023module_init (klsi_105_init);
1024module_exit (klsi_105_exit);
1025
1026MODULE_AUTHOR( DRIVER_AUTHOR );
1027MODULE_DESCRIPTION( DRIVER_DESC );
1028MODULE_LICENSE("GPL");
1029
1030
1031module_param(debug, bool, S_IRUGO | S_IWUSR);
1032MODULE_PARM_DESC(debug, "enable extensive debugging messages");
1033
1034/* vim: set sts=8 ts=8 sw=8: */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-19 16:17:34 -0500