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[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / usb / serial / kl5kusb105.c
bloba11e829e38c8a04e8c90b1d3fa8f262176a4b41e
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
62 static int debug;
63
64 /*
65 * Version Information
66 */
67 #define DRIVER_VERSION "v0.3a"
68 #define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>"
69 #define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver"
70
71
72 /*
73 * Function prototypes
74 */
75 static int klsi_105_startup (struct usb_serial *serial);
76 static void klsi_105_shutdown (struct usb_serial *serial);
77 static int klsi_105_open (struct usb_serial_port *port,
78 struct file *filp);
79 static void klsi_105_close (struct usb_serial_port *port,
80 struct file *filp);
81 static int klsi_105_write (struct usb_serial_port *port,
82 const unsigned char *buf,
83 int count);
84 static void klsi_105_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
85 static int klsi_105_chars_in_buffer (struct usb_serial_port *port);
86 static int klsi_105_write_room (struct usb_serial_port *port);
87
88 static void klsi_105_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
89 static void klsi_105_set_termios (struct usb_serial_port *port,
90 struct termios * old);
91 static int klsi_105_ioctl (struct usb_serial_port *port,
92 struct file * file,
93 unsigned int cmd,
94 unsigned long arg);
95 static void klsi_105_throttle (struct usb_serial_port *port);
96 static void klsi_105_unthrottle (struct usb_serial_port *port);
97 /*
98 static void klsi_105_break_ctl (struct usb_serial_port *port,
99 int break_state );
100 */
101 static int klsi_105_tiocmget (struct usb_serial_port *port,
102 struct file *file);
103 static 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 */
110 static 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
116 MODULE_DEVICE_TABLE (usb, id_table);
117
118 static 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
126 static 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
153 struct 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
164 struct 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
183 static 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 */
208 static 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
224 static 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
260 static 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
318 static 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 kfree(write_urbs[j]->transfer_buffer);
345 usb_free_urb (write_urbs[j]);
346 }
347 }
348
349 spin_unlock_irqrestore (&priv->lock, flags);
350
351 kfree(priv);
352 usb_set_serial_port_data(serial->port[i], NULL);
353 }
354 }
355 } /* klsi_105_shutdown */
356
357 static int klsi_105_open (struct usb_serial_port *port, struct file *filp)
358 {
359 struct klsi_105_private *priv = usb_get_serial_port_data(port);
360 int retval = 0;
361 int rc;
362 int i;
363 unsigned long line_state;
364 struct klsi_105_port_settings cfg;
365 unsigned long flags;
366
367 dbg("%s port %d", __FUNCTION__, port->number);
368
369 /* force low_latency on so that our tty_push actually forces
370 * the data through
371 * port->tty->low_latency = 1; */
372
373 /* Do a defined restart:
374 * Set up sane default baud rate and send the 'READ_ON'
375 * vendor command.
376 * FIXME: set modem line control (how?)
377 * Then read the modem line control and store values in
378 * priv->line_state.
379 */
380 cfg.pktlen = 5;
381 cfg.baudrate = kl5kusb105a_sio_b9600;
382 cfg.databits = kl5kusb105a_dtb_8;
383 cfg.unknown1 = 0;
384 cfg.unknown2 = 1;
385 klsi_105_chg_port_settings(port, &cfg);
386
387 /* set up termios structure */
388 spin_lock_irqsave (&priv->lock, flags);
389 priv->termios.c_iflag = port->tty->termios->c_iflag;
390 priv->termios.c_oflag = port->tty->termios->c_oflag;
391 priv->termios.c_cflag = port->tty->termios->c_cflag;
392 priv->termios.c_lflag = port->tty->termios->c_lflag;
393 for (i=0; i<NCCS; i++)
394 priv->termios.c_cc[i] = port->tty->termios->c_cc[i];
395 priv->cfg.pktlen = cfg.pktlen;
396 priv->cfg.baudrate = cfg.baudrate;
397 priv->cfg.databits = cfg.databits;
398 priv->cfg.unknown1 = cfg.unknown1;
399 priv->cfg.unknown2 = cfg.unknown2;
400 spin_unlock_irqrestore (&priv->lock, flags);
401
402 /* READ_ON and urb submission */
403 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
404 usb_rcvbulkpipe(port->serial->dev,
405 port->bulk_in_endpointAddress),
406 port->read_urb->transfer_buffer,
407 port->read_urb->transfer_buffer_length,
408 klsi_105_read_bulk_callback,
409 port);
410
411 rc = usb_submit_urb(port->read_urb, GFP_KERNEL);
412 if (rc) {
413 err("%s - failed submitting read urb, error %d", __FUNCTION__, rc);
414 retval = rc;
415 goto exit;
416 }
417
418 rc = usb_control_msg(port->serial->dev,
419 usb_sndctrlpipe(port->serial->dev,0),
420 KL5KUSB105A_SIO_CONFIGURE,
421 USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
422 KL5KUSB105A_SIO_CONFIGURE_READ_ON,
423 0, /* index */
424 NULL,
425 0,
426 KLSI_TIMEOUT);
427 if (rc < 0) {
428 err("Enabling read failed (error = %d)", rc);
429 retval = rc;
430 } else
431 dbg("%s - enabled reading", __FUNCTION__);
432
433 rc = klsi_105_get_line_state(port, &line_state);
434 if (rc >= 0) {
435 spin_lock_irqsave (&priv->lock, flags);
436 priv->line_state = line_state;
437 spin_unlock_irqrestore (&priv->lock, flags);
438 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state);
439 retval = 0;
440 } else
441 retval = rc;
442
443 exit:
444 return retval;
445 } /* klsi_105_open */
446
447
448 static void klsi_105_close (struct usb_serial_port *port, struct file *filp)
449 {
450 struct klsi_105_private *priv = usb_get_serial_port_data(port);
451 int rc;
452
453 dbg("%s port %d", __FUNCTION__, port->number);
454
455 /* send READ_OFF */
456 rc = usb_control_msg (port->serial->dev,
457 usb_sndctrlpipe(port->serial->dev, 0),
458 KL5KUSB105A_SIO_CONFIGURE,
459 USB_TYPE_VENDOR | USB_DIR_OUT,
460 KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
461 0, /* index */
462 NULL, 0,
463 KLSI_TIMEOUT);
464 if (rc < 0)
465 err("Disabling read failed (error = %d)", rc);
466
467 /* shutdown our bulk reads and writes */
468 usb_kill_urb(port->write_urb);
469 usb_kill_urb(port->read_urb);
470 /* unlink our write pool */
471 /* FIXME */
472 /* wgg - do I need this? I think so. */
473 usb_kill_urb(port->interrupt_in_urb);
474 info("kl5kusb105 port stats: %ld bytes in, %ld bytes out", priv->bytes_in, priv->bytes_out);
475 } /* klsi_105_close */
476
477
478 /* We need to write a complete 64-byte data block and encode the
479 * number actually sent in the first double-byte, LSB-order. That
480 * leaves at most 62 bytes of payload.
481 */
482 #define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */
483
484
485 static int klsi_105_write (struct usb_serial_port *port,
486 const unsigned char *buf, int count)
487 {
488 struct klsi_105_private *priv = usb_get_serial_port_data(port);
489 int result, size;
490 int bytes_sent=0;
491
492 dbg("%s - port %d", __FUNCTION__, port->number);
493
494 while (count > 0) {
495 /* try to find a free urb (write 0 bytes if none) */
496 struct urb *urb = NULL;
497 unsigned long flags;
498 int i;
499 /* since the pool is per-port we might not need the spin lock !? */
500 spin_lock_irqsave (&priv->lock, flags);
501 for (i=0; i<NUM_URBS; i++) {
502 if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
503 urb = priv->write_urb_pool[i];
504 dbg("%s - using pool URB %d", __FUNCTION__, i);
505 break;
506 }
507 }
508 spin_unlock_irqrestore (&priv->lock, flags);
509
510 if (urb==NULL) {
511 dbg("%s - no more free urbs", __FUNCTION__);
512 goto exit;
513 }
514
515 if (urb->transfer_buffer == NULL) {
516 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
517 if (urb->transfer_buffer == NULL) {
518 err("%s - no more kernel memory...", __FUNCTION__);
519 goto exit;
520 }
521 }
522
523 size = min (count, port->bulk_out_size - KLSI_105_DATA_OFFSET);
524 size = min (size, URB_TRANSFER_BUFFER_SIZE - KLSI_105_DATA_OFFSET);
525
526 memcpy (urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size);
527
528 /* write payload size into transfer buffer */
529 ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF);
530 ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8);
531
532 /* set up our urb */
533 usb_fill_bulk_urb(urb, port->serial->dev,
534 usb_sndbulkpipe(port->serial->dev,
535 port->bulk_out_endpointAddress),
536 urb->transfer_buffer,
537 URB_TRANSFER_BUFFER_SIZE,
538 klsi_105_write_bulk_callback,
539 port);
540
541 /* send the data out the bulk port */
542 result = usb_submit_urb(urb, GFP_ATOMIC);
543 if (result) {
544 err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
545 goto exit;
546 }
547 buf += size;
548 bytes_sent += size;
549 count -= size;
550 }
551 exit:
552 /* lockless, but it's for debug info only... */
553 priv->bytes_out+=bytes_sent;
554
555 return bytes_sent; /* that's how much we wrote */
556 } /* klsi_105_write */
557
558 static void klsi_105_write_bulk_callback ( struct urb *urb, struct pt_regs *regs)
559 {
560 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
561
562 dbg("%s - port %d", __FUNCTION__, port->number);
563
564 if (urb->status) {
565 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__,
566 urb->status);
567 return;
568 }
569
570 /* from generic_write_bulk_callback */
571 schedule_work(&port->work);
572 } /* klsi_105_write_bulk_completion_callback */
573
574
575 /* return number of characters currently in the writing process */
576 static int klsi_105_chars_in_buffer (struct usb_serial_port *port)
577 {
578 int chars = 0;
579 int i;
580 unsigned long flags;
581 struct klsi_105_private *priv = usb_get_serial_port_data(port);
582
583 spin_lock_irqsave (&priv->lock, flags);
584
585 for (i = 0; i < NUM_URBS; ++i) {
586 if (priv->write_urb_pool[i]->status == -EINPROGRESS) {
587 chars += URB_TRANSFER_BUFFER_SIZE;
588 }
589 }
590
591 spin_unlock_irqrestore (&priv->lock, flags);
592
593 dbg("%s - returns %d", __FUNCTION__, chars);
594 return (chars);
595 }
596
597 static int klsi_105_write_room (struct usb_serial_port *port)
598 {
599 unsigned long flags;
600 int i;
601 int room = 0;
602 struct klsi_105_private *priv = usb_get_serial_port_data(port);
603
604 spin_lock_irqsave (&priv->lock, flags);
605 for (i = 0; i < NUM_URBS; ++i) {
606 if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
607 room += URB_TRANSFER_BUFFER_SIZE;
608 }
609 }
610
611 spin_unlock_irqrestore (&priv->lock, flags);
612
613 dbg("%s - returns %d", __FUNCTION__, room);
614 return (room);
615 }
616
617
618
619 static void klsi_105_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
620 {
621 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
622 struct klsi_105_private *priv = usb_get_serial_port_data(port);
623 struct tty_struct *tty;
624 unsigned char *data = urb->transfer_buffer;
625 int rc;
626
627 dbg("%s - port %d", __FUNCTION__, port->number);
628
629 /* The urb might have been killed. */
630 if (urb->status) {
631 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__,
632 urb->status);
633 return;
634 }
635
636 /* The data received is again preceded by a length double-byte in LSB-
637 * first order (see klsi_105_write() )
638 */
639 if (urb->actual_length == 0) {
640 /* empty urbs seem to happen, we ignore them */
641 /* dbg("%s - emtpy URB", __FUNCTION__); */
642 ;
643 } else if (urb->actual_length <= 2) {
644 dbg("%s - size %d URB not understood", __FUNCTION__,
645 urb->actual_length);
646 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
647 urb->actual_length, data);
648 } else {
649 int i;
650 int bytes_sent = ((__u8 *) data)[0] +
651 ((unsigned int) ((__u8 *) data)[1] << 8);
652 tty = port->tty;
653 /* we should immediately resubmit the URB, before attempting
654 * to pass the data on to the tty layer. But that needs locking
655 * against re-entry an then mixed-up data because of
656 * intermixed tty_flip_buffer_push()s
657 * FIXME
658 */
659 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
660 urb->actual_length, data);
661
662 if (bytes_sent + 2 > urb->actual_length) {
663 dbg("%s - trying to read more data than available"
664 " (%d vs. %d)", __FUNCTION__,
665 bytes_sent+2, urb->actual_length);
666 /* cap at implied limit */
667 bytes_sent = urb->actual_length - 2;
668 }
669
670 for (i = 2; i < 2+bytes_sent; i++) {
671 /* if we insert more than TTY_FLIPBUF_SIZE characters,
672 * we drop them. */
673 if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
674 tty_flip_buffer_push(tty);
675 }
676 /* this doesn't actually push the data through unless
677 * tty->low_latency is set */
678 tty_insert_flip_char(tty, ((__u8*) data)[i], 0);
679 }
680 tty_flip_buffer_push(tty);
681
682 /* again lockless, but debug info only */
683 priv->bytes_in += bytes_sent;
684 }
685 /* Continue trying to always read */
686 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
687 usb_rcvbulkpipe(port->serial->dev,
688 port->bulk_in_endpointAddress),
689 port->read_urb->transfer_buffer,
690 port->read_urb->transfer_buffer_length,
691 klsi_105_read_bulk_callback,
692 port);
693 rc = usb_submit_urb(port->read_urb, GFP_ATOMIC);
694 if (rc)
695 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, rc);
696 } /* klsi_105_read_bulk_callback */
697
698
699 static void klsi_105_set_termios (struct usb_serial_port *port,
700 struct termios *old_termios)
701 {
702 struct klsi_105_private *priv = usb_get_serial_port_data(port);
703 unsigned int iflag = port->tty->termios->c_iflag;
704 unsigned int old_iflag = old_termios->c_iflag;
705 unsigned int cflag = port->tty->termios->c_cflag;
706 unsigned int old_cflag = old_termios->c_cflag;
707 struct klsi_105_port_settings cfg;
708 unsigned long flags;
709
710 /* lock while we are modifying the settings */
711 spin_lock_irqsave (&priv->lock, flags);
712
713 /*
714 * Update baud rate
715 */
716 if( (cflag & CBAUD) != (old_cflag & CBAUD) ) {
717 /* reassert DTR and (maybe) RTS on transition from B0 */
718 if( (old_cflag & CBAUD) == B0 ) {
719 dbg("%s: baud was B0", __FUNCTION__);
720 #if 0
721 priv->control_state |= TIOCM_DTR;
722 /* don't set RTS if using hardware flow control */
723 if (!(old_cflag & CRTSCTS)) {
724 priv->control_state |= TIOCM_RTS;
725 }
726 mct_u232_set_modem_ctrl(serial, priv->control_state);
727 #endif
728 }
729
730 switch(cflag & CBAUD) {
731 case B0: /* handled below */
732 break;
733 case B1200: priv->cfg.baudrate = kl5kusb105a_sio_b1200;
734 break;
735 case B2400: priv->cfg.baudrate = kl5kusb105a_sio_b2400;
736 break;
737 case B4800: priv->cfg.baudrate = kl5kusb105a_sio_b4800;
738 break;
739 case B9600: priv->cfg.baudrate = kl5kusb105a_sio_b9600;
740 break;
741 case B19200: priv->cfg.baudrate = kl5kusb105a_sio_b19200;
742 break;
743 case B38400: priv->cfg.baudrate = kl5kusb105a_sio_b38400;
744 break;
745 case B57600: priv->cfg.baudrate = kl5kusb105a_sio_b57600;
746 break;
747 case B115200: priv->cfg.baudrate = kl5kusb105a_sio_b115200;
748 break;
749 default:
750 err("KLSI USB->Serial converter:"
751 " unsupported baudrate request, using default"
752 " of 9600");
753 priv->cfg.baudrate = kl5kusb105a_sio_b9600;
754 break;
755 }
756 if ((cflag & CBAUD) == B0 ) {
757 dbg("%s: baud is B0", __FUNCTION__);
758 /* Drop RTS and DTR */
759 /* maybe this should be simulated by sending read
760 * disable and read enable messages?
761 */
762 ;
763 #if 0
764 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
765 mct_u232_set_modem_ctrl(serial, priv->control_state);
766 #endif
767 }
768 }
769
770 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
771 /* set the number of data bits */
772 switch (cflag & CSIZE) {
773 case CS5:
774 dbg("%s - 5 bits/byte not supported", __FUNCTION__);
775 spin_unlock_irqrestore (&priv->lock, flags);
776 return ;
777 case CS6:
778 dbg("%s - 6 bits/byte not supported", __FUNCTION__);
779 spin_unlock_irqrestore (&priv->lock, flags);
780 return ;
781 case CS7:
782 priv->cfg.databits = kl5kusb105a_dtb_7;
783 break;
784 case CS8:
785 priv->cfg.databits = kl5kusb105a_dtb_8;
786 break;
787 default:
788 err("CSIZE was not CS5-CS8, using default of 8");
789 priv->cfg.databits = kl5kusb105a_dtb_8;
790 break;
791 }
792 }
793
794 /*
795 * Update line control register (LCR)
796 */
797 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
798 || (cflag & CSTOPB) != (old_cflag & CSTOPB) ) {
799
800 #if 0
801 priv->last_lcr = 0;
802
803 /* set the parity */
804 if (cflag & PARENB)
805 priv->last_lcr |= (cflag & PARODD) ?
806 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
807 else
808 priv->last_lcr |= MCT_U232_PARITY_NONE;
809
810 /* set the number of stop bits */
811 priv->last_lcr |= (cflag & CSTOPB) ?
812 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
813
814 mct_u232_set_line_ctrl(serial, priv->last_lcr);
815 #endif
816 ;
817 }
818
819 /*
820 * Set flow control: well, I do not really now how to handle DTR/RTS.
821 * Just do what we have seen with SniffUSB on Win98.
822 */
823 if( (iflag & IXOFF) != (old_iflag & IXOFF)
824 || (iflag & IXON) != (old_iflag & IXON)
825 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS) ) {
826
827 /* Drop DTR/RTS if no flow control otherwise assert */
828 #if 0
829 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS) )
830 priv->control_state |= TIOCM_DTR | TIOCM_RTS;
831 else
832 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
833 mct_u232_set_modem_ctrl(serial, priv->control_state);
834 #endif
835 ;
836 }
837 memcpy (&cfg, &priv->cfg, sizeof(cfg));
838 spin_unlock_irqrestore (&priv->lock, flags);
839
840 /* now commit changes to device */
841 klsi_105_chg_port_settings(port, &cfg);
842 } /* klsi_105_set_termios */
843
844
845 #if 0
846 static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state )
847 {
848 struct usb_serial *serial = port->serial;
849 struct mct_u232_private *priv = (struct mct_u232_private *)port->private;
850 unsigned char lcr = priv->last_lcr;
851
852 dbg("%sstate=%d", __FUNCTION__, break_state);
853
854 if (break_state)
855 lcr |= MCT_U232_SET_BREAK;
856
857 mct_u232_set_line_ctrl(serial, lcr);
858 } /* mct_u232_break_ctl */
859 #endif
860
861 static int klsi_105_tiocmget (struct usb_serial_port *port, struct file *file)
862 {
863 struct klsi_105_private *priv = usb_get_serial_port_data(port);
864 unsigned long flags;
865 int rc;
866 unsigned long line_state;
867 dbg("%s - request, just guessing", __FUNCTION__);
868
869 rc = klsi_105_get_line_state(port, &line_state);
870 if (rc < 0) {
871 err("Reading line control failed (error = %d)", rc);
872 /* better return value? EAGAIN? */
873 return rc;
874 }
875
876 spin_lock_irqsave (&priv->lock, flags);
877 priv->line_state = line_state;
878 spin_unlock_irqrestore (&priv->lock, flags);
879 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state);
880 return (int)line_state;
881 }
882
883 static int klsi_105_tiocmset (struct usb_serial_port *port, struct file *file,
884 unsigned int set, unsigned int clear)
885 {
886 int retval = -EINVAL;
887
888 dbg("%s", __FUNCTION__);
889
890 /* if this ever gets implemented, it should be done something like this:
891 struct usb_serial *serial = port->serial;
892 struct klsi_105_private *priv = usb_get_serial_port_data(port);
893 unsigned long flags;
894 int control;
895
896 spin_lock_irqsave (&priv->lock, flags);
897 if (set & TIOCM_RTS)
898 priv->control_state |= TIOCM_RTS;
899 if (set & TIOCM_DTR)
900 priv->control_state |= TIOCM_DTR;
901 if (clear & TIOCM_RTS)
902 priv->control_state &= ~TIOCM_RTS;
903 if (clear & TIOCM_DTR)
904 priv->control_state &= ~TIOCM_DTR;
905 control = priv->control_state;
906 spin_unlock_irqrestore (&priv->lock, flags);
907 retval = mct_u232_set_modem_ctrl(serial, control);
908 */
909 return retval;
910 }
911
912 static int klsi_105_ioctl (struct usb_serial_port *port, struct file * file,
913 unsigned int cmd, unsigned long arg)
914 {
915 struct klsi_105_private *priv = usb_get_serial_port_data(port);
916 void __user *user_arg = (void __user *)arg;
917
918 dbg("%scmd=0x%x", __FUNCTION__, cmd);
919
920 /* Based on code from acm.c and others */
921 switch (cmd) {
922 case TIOCMIWAIT:
923 /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/
924 /* TODO */
925 dbg("%s - TIOCMIWAIT not handled", __FUNCTION__);
926 return -ENOIOCTLCMD;
927 case TIOCGICOUNT:
928 /* return count of modemline transitions */
929 /* TODO */
930 dbg("%s - TIOCGICOUNT not handled", __FUNCTION__);
931 return -ENOIOCTLCMD;
932 case TCGETS:
933 /* return current info to caller */
934 dbg("%s - TCGETS data faked/incomplete", __FUNCTION__);
935
936 if (!access_ok(VERIFY_WRITE, user_arg, sizeof(struct termios)))
937 return -EFAULT;
938
939 if (kernel_termios_to_user_termios((struct termios __user *)arg,
940 &priv->termios))
941 return -EFAULT;
942 return 0;
943 case TCSETS:
944 /* set port termios to the one given by the user */
945 dbg("%s - TCSETS not handled", __FUNCTION__);
946
947 if (!access_ok(VERIFY_READ, user_arg, sizeof(struct termios)))
948 return -EFAULT;
949
950 if (user_termios_to_kernel_termios(&priv->termios,
951 (struct termios __user *)arg))
952 return -EFAULT;
953 klsi_105_set_termios(port, &priv->termios);
954 return 0;
955 case TCSETSW: {
956 /* set port termios and try to wait for completion of last
957 * write operation */
958 /* We guess here. If there are not too many write urbs
959 * outstanding, we lie. */
960 /* what is the right way to wait here? schedule() ? */
961 /*
962 while (klsi_105_chars_in_buffer(port) > (NUM_URBS / 4 ) * URB_TRANSFER_BUFFER_SIZE)
963 schedule();
964 */
965 return -ENOIOCTLCMD;
966 }
967 default:
968 dbg("%s: arg not supported - 0x%04x", __FUNCTION__,cmd);
969 return(-ENOIOCTLCMD);
970 break;
971 }
972 return 0;
973 } /* klsi_105_ioctl */
974
975 static void klsi_105_throttle (struct usb_serial_port *port)
976 {
977 dbg("%s - port %d", __FUNCTION__, port->number);
978 usb_kill_urb(port->read_urb);
979 }
980
981 static void klsi_105_unthrottle (struct usb_serial_port *port)
982 {
983 int result;
984
985 dbg("%s - port %d", __FUNCTION__, port->number);
986
987 port->read_urb->dev = port->serial->dev;
988 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
989 if (result)
990 err("%s - failed submitting read urb, error %d", __FUNCTION__,
991 result);
992 }
993
994
995
996 static int __init klsi_105_init (void)
997 {
998 int retval;
999 retval = usb_serial_register(&kl5kusb105d_device);
1000 if (retval)
1001 goto failed_usb_serial_register;
1002 retval = usb_register(&kl5kusb105d_driver);
1003 if (retval)
1004 goto failed_usb_register;
1005
1006 info(DRIVER_DESC " " DRIVER_VERSION);
1007 return 0;
1008 failed_usb_register:
1009 usb_serial_deregister(&kl5kusb105d_device);
1010 failed_usb_serial_register:
1011 return retval;
1012 }
1013
1014
1015 static void __exit klsi_105_exit (void)
1016 {
1017 usb_deregister (&kl5kusb105d_driver);
1018 usb_serial_deregister (&kl5kusb105d_device);
1019 }
1020
1021
1022 module_init (klsi_105_init);
1023 module_exit (klsi_105_exit);
1024
1025 MODULE_AUTHOR( DRIVER_AUTHOR );
1026 MODULE_DESCRIPTION( DRIVER_DESC );
1027 MODULE_LICENSE("GPL");
1028
1029
1030 module_param(debug, bool, S_IRUGO | S_IWUSR);
1031 MODULE_PARM_DESC(debug, "enable extensive debugging messages");
1032
1033 /* vim: set sts=8 ts=8 sw=8: */
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