sky2: remove unneede workaround
[linux-2.6/mini2440.git] / drivers / usb / serial / kl5kusb105.c
blobfcd9082f3e7f05d93fedc3073e3f6a87c318a6a8
1 /*
2 * KLSI KL5KUSB105 chip RS232 converter driver
4 * Copyright (C) 2001 Utz-Uwe Haus <haus@uuhaus.de>
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.
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.
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.
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!
32 /* TODO:
33 * check modem line signals
34 * implement handshaking or decide that we do not support it
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
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.
48 #include <linux/kernel.h>
49 #include <linux/errno.h>
50 #include <linux/init.h>
51 #include <linux/slab.h>
52 #include <linux/tty.h>
53 #include <linux/tty_driver.h>
54 #include <linux/tty_flip.h>
55 #include <linux/module.h>
56 #include <linux/uaccess.h>
57 #include <asm/unaligned.h>
58 #include <linux/usb.h>
59 #include <linux/usb/serial.h>
60 #include "kl5kusb105.h"
62 static int debug;
65 * Version Information
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"
73 * Function prototypes
75 static int klsi_105_startup(struct usb_serial *serial);
76 static void klsi_105_shutdown(struct usb_serial *serial);
77 static int klsi_105_open(struct tty_struct *tty,
78 struct usb_serial_port *port, struct file *filp);
79 static void klsi_105_close(struct tty_struct *tty,
80 struct usb_serial_port *port, struct file *filp);
81 static int klsi_105_write(struct tty_struct *tty,
82 struct usb_serial_port *port, const unsigned char *buf, int count);
83 static void klsi_105_write_bulk_callback(struct urb *urb);
84 static int klsi_105_chars_in_buffer(struct tty_struct *tty);
85 static int klsi_105_write_room(struct tty_struct *tty);
86 static void klsi_105_read_bulk_callback(struct urb *urb);
87 static void klsi_105_set_termios(struct tty_struct *tty,
88 struct usb_serial_port *port, struct ktermios *old);
89 static void klsi_105_throttle(struct tty_struct *tty);
90 static void klsi_105_unthrottle(struct tty_struct *tty);
91 static int klsi_105_tiocmget(struct tty_struct *tty, struct file *file);
92 static int klsi_105_tiocmset(struct tty_struct *tty, struct file *file,
93 unsigned int set, unsigned int clear);
96 * All of the device info needed for the KLSI converters.
98 static struct usb_device_id id_table [] = {
99 { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) },
100 { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) },
101 { } /* Terminating entry */
104 MODULE_DEVICE_TABLE(usb, id_table);
106 static struct usb_driver kl5kusb105d_driver = {
107 .name = "kl5kusb105d",
108 .probe = usb_serial_probe,
109 .disconnect = usb_serial_disconnect,
110 .id_table = id_table,
111 .no_dynamic_id = 1,
114 static struct usb_serial_driver kl5kusb105d_device = {
115 .driver = {
116 .owner = THIS_MODULE,
117 .name = "kl5kusb105d",
119 .description = "KL5KUSB105D / PalmConnect",
120 .usb_driver = &kl5kusb105d_driver,
121 .id_table = id_table,
122 .num_ports = 1,
123 .open = klsi_105_open,
124 .close = klsi_105_close,
125 .write = klsi_105_write,
126 .write_bulk_callback = klsi_105_write_bulk_callback,
127 .chars_in_buffer = klsi_105_chars_in_buffer,
128 .write_room = klsi_105_write_room,
129 .read_bulk_callback = klsi_105_read_bulk_callback,
130 .set_termios = klsi_105_set_termios,
131 /*.break_ctl = klsi_105_break_ctl,*/
132 .tiocmget = klsi_105_tiocmget,
133 .tiocmset = klsi_105_tiocmset,
134 .attach = klsi_105_startup,
135 .shutdown = klsi_105_shutdown,
136 .throttle = klsi_105_throttle,
137 .unthrottle = klsi_105_unthrottle,
140 struct klsi_105_port_settings {
141 __u8 pktlen; /* always 5, it seems */
142 __u8 baudrate;
143 __u8 databits;
144 __u8 unknown1;
145 __u8 unknown2;
146 } __attribute__ ((packed));
148 /* we implement a pool of NUM_URBS urbs per usb_serial */
149 #define NUM_URBS 1
150 #define URB_TRANSFER_BUFFER_SIZE 64
151 struct klsi_105_private {
152 struct klsi_105_port_settings cfg;
153 struct ktermios termios;
154 unsigned long line_state; /* modem line settings */
155 /* write pool */
156 struct urb *write_urb_pool[NUM_URBS];
157 spinlock_t lock;
158 unsigned long bytes_in;
159 unsigned long bytes_out;
164 * Handle vendor specific USB requests
168 #define KLSI_TIMEOUT 5000 /* default urb timeout */
170 static int klsi_105_chg_port_settings(struct usb_serial_port *port,
171 struct klsi_105_port_settings *settings)
173 int rc;
175 rc = usb_control_msg(port->serial->dev,
176 usb_sndctrlpipe(port->serial->dev, 0),
177 KL5KUSB105A_SIO_SET_DATA,
178 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE,
179 0, /* value */
180 0, /* index */
181 settings,
182 sizeof(struct klsi_105_port_settings),
183 KLSI_TIMEOUT);
184 if (rc < 0)
185 dev_err(&port->dev,
186 "Change port settings failed (error = %d)\n", rc);
187 dev_info(&port->serial->dev->dev,
188 "%d byte block, baudrate %x, databits %d, u1 %d, u2 %d\n",
189 settings->pktlen, settings->baudrate, settings->databits,
190 settings->unknown1, settings->unknown2);
191 return rc;
192 } /* klsi_105_chg_port_settings */
194 /* translate a 16-bit status value from the device to linux's TIO bits */
195 static unsigned long klsi_105_status2linestate(const __u16 status)
197 unsigned long res = 0;
199 res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0)
200 | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0)
203 return res;
206 * Read line control via vendor command and return result through
207 * *line_state_p
209 /* It seems that the status buffer has always only 2 bytes length */
210 #define KLSI_STATUSBUF_LEN 2
211 static int klsi_105_get_line_state(struct usb_serial_port *port,
212 unsigned long *line_state_p)
214 int rc;
215 __u8 status_buf[KLSI_STATUSBUF_LEN] = { -1, -1};
216 __u16 status;
218 dev_info(&port->serial->dev->dev, "sending SIO Poll request\n");
219 rc = usb_control_msg(port->serial->dev,
220 usb_rcvctrlpipe(port->serial->dev, 0),
221 KL5KUSB105A_SIO_POLL,
222 USB_TYPE_VENDOR | USB_DIR_IN,
223 0, /* value */
224 0, /* index */
225 status_buf, KLSI_STATUSBUF_LEN,
226 10000
228 if (rc < 0)
229 dev_err(&port->dev, "Reading line status failed (error = %d)\n",
230 rc);
231 else {
232 status = get_unaligned_le16(status_buf);
234 dev_info(&port->serial->dev->dev, "read status %x %x",
235 status_buf[0], status_buf[1]);
237 *line_state_p = klsi_105_status2linestate(status);
239 return rc;
244 * Driver's tty interface functions
247 static int klsi_105_startup(struct usb_serial *serial)
249 struct klsi_105_private *priv;
250 int i, j;
252 /* check if we support the product id (see keyspan.c)
253 * FIXME
256 /* allocate the private data structure */
257 for (i = 0; i < serial->num_ports; i++) {
258 priv = kmalloc(sizeof(struct klsi_105_private),
259 GFP_KERNEL);
260 if (!priv) {
261 dbg("%skmalloc for klsi_105_private failed.", __func__);
262 i--;
263 goto err_cleanup;
265 /* set initial values for control structures */
266 priv->cfg.pktlen = 5;
267 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
268 priv->cfg.databits = kl5kusb105a_dtb_8;
269 priv->cfg.unknown1 = 0;
270 priv->cfg.unknown2 = 1;
272 priv->line_state = 0;
274 priv->bytes_in = 0;
275 priv->bytes_out = 0;
276 usb_set_serial_port_data(serial->port[i], priv);
278 spin_lock_init(&priv->lock);
279 for (j = 0; j < NUM_URBS; j++) {
280 struct urb *urb = usb_alloc_urb(0, GFP_KERNEL);
282 priv->write_urb_pool[j] = urb;
283 if (urb == NULL) {
284 dev_err(&serial->dev->dev, "No more urbs???\n");
285 goto err_cleanup;
288 urb->transfer_buffer =
289 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
290 if (!urb->transfer_buffer) {
291 dev_err(&serial->dev->dev,
292 "%s - out of memory for urb buffers.\n",
293 __func__);
294 goto err_cleanup;
298 /* priv->termios is left uninitalized until port opening */
299 init_waitqueue_head(&serial->port[i]->write_wait);
302 return 0;
304 err_cleanup:
305 for (; i >= 0; i--) {
306 priv = usb_get_serial_port_data(serial->port[i]);
307 for (j = 0; j < NUM_URBS; j++) {
308 if (priv->write_urb_pool[j]) {
309 kfree(priv->write_urb_pool[j]->transfer_buffer);
310 usb_free_urb(priv->write_urb_pool[j]);
313 usb_set_serial_port_data(serial->port[i], NULL);
315 return -ENOMEM;
316 } /* klsi_105_startup */
319 static void klsi_105_shutdown(struct usb_serial *serial)
321 int i;
323 dbg("%s", __func__);
325 /* stop reads and writes on all ports */
326 for (i = 0; i < serial->num_ports; ++i) {
327 struct klsi_105_private *priv =
328 usb_get_serial_port_data(serial->port[i]);
329 unsigned long flags;
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);
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]); */
346 kfree(write_urbs[j]->transfer_buffer);
347 usb_free_urb(write_urbs[j]);
350 spin_unlock_irqrestore(&priv->lock, flags);
351 kfree(priv);
352 usb_set_serial_port_data(serial->port[i], NULL);
355 } /* klsi_105_shutdown */
357 static int klsi_105_open(struct tty_struct *tty,
358 struct usb_serial_port *port, struct file *filp)
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;
368 dbg("%s port %d", __func__, port->number);
370 /* force low_latency on so that our tty_push actually forces
371 * the data through
372 * tty->low_latency = 1; */
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.
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);
388 /* set up termios structure */
389 spin_lock_irqsave(&priv->lock, flags);
390 priv->termios.c_iflag = tty->termios->c_iflag;
391 priv->termios.c_oflag = tty->termios->c_oflag;
392 priv->termios.c_cflag = tty->termios->c_cflag;
393 priv->termios.c_lflag = tty->termios->c_lflag;
394 for (i = 0; i < NCCS; i++)
395 priv->termios.c_cc[i] = 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);
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);
412 rc = usb_submit_urb(port->read_urb, GFP_KERNEL);
413 if (rc) {
414 dev_err(&port->dev, "%s - failed submitting read urb, "
415 "error %d\n", __func__, rc);
416 retval = rc;
417 goto exit;
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,
428 KLSI_TIMEOUT);
429 if (rc < 0) {
430 dev_err(&port->dev, "Enabling read failed (error = %d)\n", rc);
431 retval = rc;
432 } else
433 dbg("%s - enabled reading", __func__);
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", __func__, line_state);
441 retval = 0;
442 } else
443 retval = rc;
445 exit:
446 return retval;
447 } /* klsi_105_open */
450 static void klsi_105_close(struct tty_struct *tty,
451 struct usb_serial_port *port, struct file *filp)
453 struct klsi_105_private *priv = usb_get_serial_port_data(port);
454 int rc;
456 dbg("%s port %d", __func__, port->number);
458 mutex_lock(&port->serial->disc_mutex);
459 if (!port->serial->disconnected) {
460 /* send READ_OFF */
461 rc = usb_control_msg(port->serial->dev,
462 usb_sndctrlpipe(port->serial->dev, 0),
463 KL5KUSB105A_SIO_CONFIGURE,
464 USB_TYPE_VENDOR | USB_DIR_OUT,
465 KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
466 0, /* index */
467 NULL, 0,
468 KLSI_TIMEOUT);
469 if (rc < 0)
470 dev_err(&port->dev,
471 "Disabling read failed (error = %d)\n", rc);
473 mutex_unlock(&port->serial->disc_mutex);
475 /* shutdown our bulk reads and writes */
476 usb_kill_urb(port->write_urb);
477 usb_kill_urb(port->read_urb);
478 /* unlink our write pool */
479 /* FIXME */
480 /* wgg - do I need this? I think so. */
481 usb_kill_urb(port->interrupt_in_urb);
482 dev_info(&port->serial->dev->dev,
483 "port stats: %ld bytes in, %ld bytes out\n",
484 priv->bytes_in, priv->bytes_out);
485 } /* klsi_105_close */
488 /* We need to write a complete 64-byte data block and encode the
489 * number actually sent in the first double-byte, LSB-order. That
490 * leaves at most 62 bytes of payload.
492 #define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */
495 static int klsi_105_write(struct tty_struct *tty,
496 struct usb_serial_port *port, const unsigned char *buf, int count)
498 struct klsi_105_private *priv = usb_get_serial_port_data(port);
499 int result, size;
500 int bytes_sent = 0;
502 dbg("%s - port %d", __func__, port->number);
504 while (count > 0) {
505 /* try to find a free urb (write 0 bytes if none) */
506 struct urb *urb = NULL;
507 unsigned long flags;
508 int i;
509 /* since the pool is per-port we might not need
510 the spin lock !? */
511 spin_lock_irqsave(&priv->lock, flags);
512 for (i = 0; i < NUM_URBS; i++) {
513 if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
514 urb = priv->write_urb_pool[i];
515 dbg("%s - using pool URB %d", __func__, i);
516 break;
519 spin_unlock_irqrestore(&priv->lock, flags);
521 if (urb == NULL) {
522 dbg("%s - no more free urbs", __func__);
523 goto exit;
526 if (urb->transfer_buffer == NULL) {
527 urb->transfer_buffer =
528 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
529 if (urb->transfer_buffer == NULL) {
530 dev_err(&port->dev,
531 "%s - no more kernel memory...\n",
532 __func__);
533 goto exit;
537 size = min(count, port->bulk_out_size - KLSI_105_DATA_OFFSET);
538 size = min(size, URB_TRANSFER_BUFFER_SIZE -
539 KLSI_105_DATA_OFFSET);
541 memcpy(urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size);
543 /* write payload size into transfer buffer */
544 ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF);
545 ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8);
547 /* set up our urb */
548 usb_fill_bulk_urb(urb, port->serial->dev,
549 usb_sndbulkpipe(port->serial->dev,
550 port->bulk_out_endpointAddress),
551 urb->transfer_buffer,
552 URB_TRANSFER_BUFFER_SIZE,
553 klsi_105_write_bulk_callback,
554 port);
556 /* send the data out the bulk port */
557 result = usb_submit_urb(urb, GFP_ATOMIC);
558 if (result) {
559 dev_err(&port->dev,
560 "%s - failed submitting write urb, error %d\n",
561 __func__, result);
562 goto exit;
564 buf += size;
565 bytes_sent += size;
566 count -= size;
568 exit:
569 /* lockless, but it's for debug info only... */
570 priv->bytes_out += bytes_sent;
572 return bytes_sent; /* that's how much we wrote */
573 } /* klsi_105_write */
575 static void klsi_105_write_bulk_callback(struct urb *urb)
577 struct usb_serial_port *port = urb->context;
578 int status = urb->status;
580 dbg("%s - port %d", __func__, port->number);
582 if (status) {
583 dbg("%s - nonzero write bulk status received: %d", __func__,
584 status);
585 return;
588 usb_serial_port_softint(port);
589 } /* klsi_105_write_bulk_completion_callback */
592 /* return number of characters currently in the writing process */
593 static int klsi_105_chars_in_buffer(struct tty_struct *tty)
595 struct usb_serial_port *port = tty->driver_data;
596 int chars = 0;
597 int i;
598 unsigned long flags;
599 struct klsi_105_private *priv = usb_get_serial_port_data(port);
601 spin_lock_irqsave(&priv->lock, flags);
603 for (i = 0; i < NUM_URBS; ++i) {
604 if (priv->write_urb_pool[i]->status == -EINPROGRESS)
605 chars += URB_TRANSFER_BUFFER_SIZE;
608 spin_unlock_irqrestore(&priv->lock, flags);
610 dbg("%s - returns %d", __func__, chars);
611 return chars;
614 static int klsi_105_write_room(struct tty_struct *tty)
616 struct usb_serial_port *port = tty->driver_data;
617 unsigned long flags;
618 int i;
619 int room = 0;
620 struct klsi_105_private *priv = usb_get_serial_port_data(port);
622 spin_lock_irqsave(&priv->lock, flags);
623 for (i = 0; i < NUM_URBS; ++i) {
624 if (priv->write_urb_pool[i]->status != -EINPROGRESS)
625 room += URB_TRANSFER_BUFFER_SIZE;
628 spin_unlock_irqrestore(&priv->lock, flags);
630 dbg("%s - returns %d", __func__, room);
631 return room;
636 static void klsi_105_read_bulk_callback(struct urb *urb)
638 struct usb_serial_port *port = urb->context;
639 struct klsi_105_private *priv = usb_get_serial_port_data(port);
640 struct tty_struct *tty;
641 unsigned char *data = urb->transfer_buffer;
642 int rc;
643 int status = urb->status;
645 dbg("%s - port %d", __func__, port->number);
647 /* The urb might have been killed. */
648 if (status) {
649 dbg("%s - nonzero read bulk status received: %d", __func__,
650 status);
651 return;
654 /* The data received is again preceded by a length double-byte in LSB-
655 * first order (see klsi_105_write() )
657 if (urb->actual_length == 0) {
658 /* empty urbs seem to happen, we ignore them */
659 /* dbg("%s - emtpy URB", __func__); */
661 } else if (urb->actual_length <= 2) {
662 dbg("%s - size %d URB not understood", __func__,
663 urb->actual_length);
664 usb_serial_debug_data(debug, &port->dev, __func__,
665 urb->actual_length, data);
666 } else {
667 int bytes_sent = ((__u8 *) data)[0] +
668 ((unsigned int) ((__u8 *) data)[1] << 8);
669 tty = tty_port_tty_get(&port->port);
670 /* we should immediately resubmit the URB, before attempting
671 * to pass the data on to the tty layer. But that needs locking
672 * against re-entry an then mixed-up data because of
673 * intermixed tty_flip_buffer_push()s
674 * FIXME
676 usb_serial_debug_data(debug, &port->dev, __func__,
677 urb->actual_length, data);
679 if (bytes_sent + 2 > urb->actual_length) {
680 dbg("%s - trying to read more data than available"
681 " (%d vs. %d)", __func__,
682 bytes_sent+2, urb->actual_length);
683 /* cap at implied limit */
684 bytes_sent = urb->actual_length - 2;
687 tty_buffer_request_room(tty, bytes_sent);
688 tty_insert_flip_string(tty, data + 2, bytes_sent);
689 tty_flip_buffer_push(tty);
690 tty_kref_put(tty);
692 /* again lockless, but debug info only */
693 priv->bytes_in += bytes_sent;
695 /* Continue trying to always read */
696 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
697 usb_rcvbulkpipe(port->serial->dev,
698 port->bulk_in_endpointAddress),
699 port->read_urb->transfer_buffer,
700 port->read_urb->transfer_buffer_length,
701 klsi_105_read_bulk_callback,
702 port);
703 rc = usb_submit_urb(port->read_urb, GFP_ATOMIC);
704 if (rc)
705 dev_err(&port->dev,
706 "%s - failed resubmitting read urb, error %d\n",
707 __func__, rc);
708 } /* klsi_105_read_bulk_callback */
711 static void klsi_105_set_termios(struct tty_struct *tty,
712 struct usb_serial_port *port,
713 struct ktermios *old_termios)
715 struct klsi_105_private *priv = usb_get_serial_port_data(port);
716 unsigned int iflag = tty->termios->c_iflag;
717 unsigned int old_iflag = old_termios->c_iflag;
718 unsigned int cflag = tty->termios->c_cflag;
719 unsigned int old_cflag = old_termios->c_cflag;
720 struct klsi_105_port_settings cfg;
721 unsigned long flags;
722 speed_t baud;
724 /* lock while we are modifying the settings */
725 spin_lock_irqsave(&priv->lock, flags);
728 * Update baud rate
730 baud = tty_get_baud_rate(tty);
732 if ((cflag & CBAUD) != (old_cflag & CBAUD)) {
733 /* reassert DTR and (maybe) RTS on transition from B0 */
734 if ((old_cflag & CBAUD) == B0) {
735 dbg("%s: baud was B0", __func__);
736 #if 0
737 priv->control_state |= TIOCM_DTR;
738 /* don't set RTS if using hardware flow control */
739 if (!(old_cflag & CRTSCTS))
740 priv->control_state |= TIOCM_RTS;
741 mct_u232_set_modem_ctrl(serial, priv->control_state);
742 #endif
745 switch (baud) {
746 case 0: /* handled below */
747 break;
748 case 1200:
749 priv->cfg.baudrate = kl5kusb105a_sio_b1200;
750 break;
751 case 2400:
752 priv->cfg.baudrate = kl5kusb105a_sio_b2400;
753 break;
754 case 4800:
755 priv->cfg.baudrate = kl5kusb105a_sio_b4800;
756 break;
757 case 9600:
758 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
759 break;
760 case 19200:
761 priv->cfg.baudrate = kl5kusb105a_sio_b19200;
762 break;
763 case 38400:
764 priv->cfg.baudrate = kl5kusb105a_sio_b38400;
765 break;
766 case 57600:
767 priv->cfg.baudrate = kl5kusb105a_sio_b57600;
768 break;
769 case 115200:
770 priv->cfg.baudrate = kl5kusb105a_sio_b115200;
771 break;
772 default:
773 dbg("KLSI USB->Serial converter:"
774 " unsupported baudrate request, using default of 9600");
775 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
776 baud = 9600;
777 break;
779 if ((cflag & CBAUD) == B0) {
780 dbg("%s: baud is B0", __func__);
781 /* Drop RTS and DTR */
782 /* maybe this should be simulated by sending read
783 * disable and read enable messages?
786 #if 0
787 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
788 mct_u232_set_modem_ctrl(serial, priv->control_state);
789 #endif
791 tty_encode_baud_rate(tty, baud, baud);
793 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
794 /* set the number of data bits */
795 switch (cflag & CSIZE) {
796 case CS5:
797 dbg("%s - 5 bits/byte not supported", __func__);
798 spin_unlock_irqrestore(&priv->lock, flags);
799 return ;
800 case CS6:
801 dbg("%s - 6 bits/byte not supported", __func__);
802 spin_unlock_irqrestore(&priv->lock, flags);
803 return ;
804 case CS7:
805 priv->cfg.databits = kl5kusb105a_dtb_7;
806 break;
807 case CS8:
808 priv->cfg.databits = kl5kusb105a_dtb_8;
809 break;
810 default:
811 dev_err(&port->dev,
812 "CSIZE was not CS5-CS8, using default of 8\n");
813 priv->cfg.databits = kl5kusb105a_dtb_8;
814 break;
819 * Update line control register (LCR)
821 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
822 || (cflag & CSTOPB) != (old_cflag & CSTOPB)) {
823 /* Not currently supported */
824 tty->termios->c_cflag &= ~(PARENB|PARODD|CSTOPB);
825 #if 0
826 priv->last_lcr = 0;
828 /* set the parity */
829 if (cflag & PARENB)
830 priv->last_lcr |= (cflag & PARODD) ?
831 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
832 else
833 priv->last_lcr |= MCT_U232_PARITY_NONE;
835 /* set the number of stop bits */
836 priv->last_lcr |= (cflag & CSTOPB) ?
837 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
839 mct_u232_set_line_ctrl(serial, priv->last_lcr);
840 #endif
844 * Set flow control: well, I do not really now how to handle DTR/RTS.
845 * Just do what we have seen with SniffUSB on Win98.
847 if ((iflag & IXOFF) != (old_iflag & IXOFF)
848 || (iflag & IXON) != (old_iflag & IXON)
849 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
850 /* Not currently supported */
851 tty->termios->c_cflag &= ~CRTSCTS;
852 /* Drop DTR/RTS if no flow control otherwise assert */
853 #if 0
854 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS))
855 priv->control_state |= TIOCM_DTR | TIOCM_RTS;
856 else
857 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
858 mct_u232_set_modem_ctrl(serial, priv->control_state);
859 #endif
862 memcpy(&cfg, &priv->cfg, sizeof(cfg));
863 spin_unlock_irqrestore(&priv->lock, flags);
865 /* now commit changes to device */
866 klsi_105_chg_port_settings(port, &cfg);
867 } /* klsi_105_set_termios */
870 #if 0
871 static void mct_u232_break_ctl(struct tty_struct *tty, int break_state)
873 struct usb_serial_port *port = tty->driver_data;
874 struct usb_serial *serial = port->serial;
875 struct mct_u232_private *priv =
876 (struct mct_u232_private *)port->private;
877 unsigned char lcr = priv->last_lcr;
879 dbg("%sstate=%d", __func__, break_state);
881 /* LOCKING */
882 if (break_state)
883 lcr |= MCT_U232_SET_BREAK;
885 mct_u232_set_line_ctrl(serial, lcr);
886 } /* mct_u232_break_ctl */
887 #endif
889 static int klsi_105_tiocmget(struct tty_struct *tty, struct file *file)
891 struct usb_serial_port *port = tty->driver_data;
892 struct klsi_105_private *priv = usb_get_serial_port_data(port);
893 unsigned long flags;
894 int rc;
895 unsigned long line_state;
896 dbg("%s - request, just guessing", __func__);
898 rc = klsi_105_get_line_state(port, &line_state);
899 if (rc < 0) {
900 dev_err(&port->dev,
901 "Reading line control failed (error = %d)\n", rc);
902 /* better return value? EAGAIN? */
903 return rc;
906 spin_lock_irqsave(&priv->lock, flags);
907 priv->line_state = line_state;
908 spin_unlock_irqrestore(&priv->lock, flags);
909 dbg("%s - read line state 0x%lx", __func__, line_state);
910 return (int)line_state;
913 static int klsi_105_tiocmset(struct tty_struct *tty, struct file *file,
914 unsigned int set, unsigned int clear)
916 int retval = -EINVAL;
918 dbg("%s", __func__);
920 /* if this ever gets implemented, it should be done something like this:
921 struct usb_serial *serial = port->serial;
922 struct klsi_105_private *priv = usb_get_serial_port_data(port);
923 unsigned long flags;
924 int control;
926 spin_lock_irqsave (&priv->lock, flags);
927 if (set & TIOCM_RTS)
928 priv->control_state |= TIOCM_RTS;
929 if (set & TIOCM_DTR)
930 priv->control_state |= TIOCM_DTR;
931 if (clear & TIOCM_RTS)
932 priv->control_state &= ~TIOCM_RTS;
933 if (clear & TIOCM_DTR)
934 priv->control_state &= ~TIOCM_DTR;
935 control = priv->control_state;
936 spin_unlock_irqrestore (&priv->lock, flags);
937 retval = mct_u232_set_modem_ctrl(serial, control);
939 return retval;
942 static void klsi_105_throttle(struct tty_struct *tty)
944 struct usb_serial_port *port = tty->driver_data;
945 dbg("%s - port %d", __func__, port->number);
946 usb_kill_urb(port->read_urb);
949 static void klsi_105_unthrottle(struct tty_struct *tty)
951 struct usb_serial_port *port = tty->driver_data;
952 int result;
954 dbg("%s - port %d", __func__, port->number);
956 port->read_urb->dev = port->serial->dev;
957 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
958 if (result)
959 dev_err(&port->dev,
960 "%s - failed submitting read urb, error %d\n",
961 __func__, result);
966 static int __init klsi_105_init(void)
968 int retval;
969 retval = usb_serial_register(&kl5kusb105d_device);
970 if (retval)
971 goto failed_usb_serial_register;
972 retval = usb_register(&kl5kusb105d_driver);
973 if (retval)
974 goto failed_usb_register;
976 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
977 DRIVER_DESC "\n");
978 return 0;
979 failed_usb_register:
980 usb_serial_deregister(&kl5kusb105d_device);
981 failed_usb_serial_register:
982 return retval;
986 static void __exit klsi_105_exit(void)
988 usb_deregister(&kl5kusb105d_driver);
989 usb_serial_deregister(&kl5kusb105d_device);
993 module_init(klsi_105_init);
994 module_exit(klsi_105_exit);
996 MODULE_AUTHOR(DRIVER_AUTHOR);
997 MODULE_DESCRIPTION(DRIVER_DESC);
998 MODULE_LICENSE("GPL");
1001 module_param(debug, bool, S_IRUGO | S_IWUSR);
1002 MODULE_PARM_DESC(debug, "enable extensive debugging messages");
1004 /* vim: set sts=8 ts=8 sw=8: */