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usb serial: support Alcor Micro Corp. USB 2.0 TO RS-232 through pl2303 driver
[linux-2.6/linux-2.6-openrd.git] / drivers / usb / serial / pl2303.c
blob1036d436ed231116e7283ea94c59a056f1206e7d
1 /*
2 * Prolific PL2303 USB to serial adaptor driver
3 *
4 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
5 * Copyright (C) 2003 IBM Corp.
6 *
7 * Original driver for 2.2.x by anonymous
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License.
12 *
13 * See Documentation/usb/usb-serial.txt for more information on using this driver
14 *
15 */
16
17 #include <linux/kernel.h>
18 #include <linux/errno.h>
19 #include <linux/init.h>
20 #include <linux/slab.h>
21 #include <linux/tty.h>
22 #include <linux/tty_driver.h>
23 #include <linux/tty_flip.h>
24 #include <linux/serial.h>
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/spinlock.h>
28 #include <asm/uaccess.h>
29 #include <linux/usb.h>
30 #include <linux/usb/serial.h>
31 #include "pl2303.h"
32
33 /*
34 * Version Information
35 */
36 #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
37
38 static int debug;
39
40 #define PL2303_CLOSING_WAIT (30*HZ)
41
42 #define PL2303_BUF_SIZE 1024
43 #define PL2303_TMP_BUF_SIZE 1024
44
45 struct pl2303_buf {
46 unsigned int buf_size;
47 char *buf_buf;
48 char *buf_get;
49 char *buf_put;
50 };
51
52 static struct usb_device_id id_table [] = {
53 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
54 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
55 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
56 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
57 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
58 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
59 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
60 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
61 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
62 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
63 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
64 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
65 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
66 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
67 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
68 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
69 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
70 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
71 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
72 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
73 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
74 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
75 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
76 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
77 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
78 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
79 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
80 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
81 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
82 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
83 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
84 { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
85 { } /* Terminating entry */
86 };
87
88 MODULE_DEVICE_TABLE(usb, id_table);
89
90 static struct usb_driver pl2303_driver = {
91 .name = "pl2303",
92 .probe = usb_serial_probe,
93 .disconnect = usb_serial_disconnect,
94 .id_table = id_table,
95 .no_dynamic_id = 1,
96 };
97
98 #define SET_LINE_REQUEST_TYPE 0x21
99 #define SET_LINE_REQUEST 0x20
100
101 #define SET_CONTROL_REQUEST_TYPE 0x21
102 #define SET_CONTROL_REQUEST 0x22
103 #define CONTROL_DTR 0x01
104 #define CONTROL_RTS 0x02
105
106 #define BREAK_REQUEST_TYPE 0x21
107 #define BREAK_REQUEST 0x23
108 #define BREAK_ON 0xffff
109 #define BREAK_OFF 0x0000
110
111 #define GET_LINE_REQUEST_TYPE 0xa1
112 #define GET_LINE_REQUEST 0x21
113
114 #define VENDOR_WRITE_REQUEST_TYPE 0x40
115 #define VENDOR_WRITE_REQUEST 0x01
116
117 #define VENDOR_READ_REQUEST_TYPE 0xc0
118 #define VENDOR_READ_REQUEST 0x01
119
120 #define UART_STATE 0x08
121 #define UART_STATE_TRANSIENT_MASK 0x74
122 #define UART_DCD 0x01
123 #define UART_DSR 0x02
124 #define UART_BREAK_ERROR 0x04
125 #define UART_RING 0x08
126 #define UART_FRAME_ERROR 0x10
127 #define UART_PARITY_ERROR 0x20
128 #define UART_OVERRUN_ERROR 0x40
129 #define UART_CTS 0x80
130
131
132 enum pl2303_type {
133 type_0, /* don't know the difference between type 0 and */
134 type_1, /* type 1, until someone from prolific tells us... */
135 HX, /* HX version of the pl2303 chip */
136 };
137
138 struct pl2303_private {
139 spinlock_t lock;
140 struct pl2303_buf *buf;
141 int write_urb_in_use;
142 wait_queue_head_t delta_msr_wait;
143 u8 line_control;
144 u8 line_status;
145 u8 termios_initialized;
146 enum pl2303_type type;
147 };
148
149 /*
150 * pl2303_buf_alloc
151 *
152 * Allocate a circular buffer and all associated memory.
153 */
154 static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
155 {
156 struct pl2303_buf *pb;
157
158 if (size == 0)
159 return NULL;
160
161 pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
162 if (pb == NULL)
163 return NULL;
164
165 pb->buf_buf = kmalloc(size, GFP_KERNEL);
166 if (pb->buf_buf == NULL) {
167 kfree(pb);
168 return NULL;
169 }
170
171 pb->buf_size = size;
172 pb->buf_get = pb->buf_put = pb->buf_buf;
173
174 return pb;
175 }
176
177 /*
178 * pl2303_buf_free
179 *
180 * Free the buffer and all associated memory.
181 */
182 static void pl2303_buf_free(struct pl2303_buf *pb)
183 {
184 if (pb) {
185 kfree(pb->buf_buf);
186 kfree(pb);
187 }
188 }
189
190 /*
191 * pl2303_buf_clear
192 *
193 * Clear out all data in the circular buffer.
194 */
195 static void pl2303_buf_clear(struct pl2303_buf *pb)
196 {
197 if (pb != NULL)
198 pb->buf_get = pb->buf_put;
199 /* equivalent to a get of all data available */
200 }
201
202 /*
203 * pl2303_buf_data_avail
204 *
205 * Return the number of bytes of data available in the circular
206 * buffer.
207 */
208 static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
209 {
210 if (pb == NULL)
211 return 0;
212
213 return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
214 }
215
216 /*
217 * pl2303_buf_space_avail
218 *
219 * Return the number of bytes of space available in the circular
220 * buffer.
221 */
222 static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
223 {
224 if (pb == NULL)
225 return 0;
226
227 return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
228 }
229
230 /*
231 * pl2303_buf_put
232 *
233 * Copy data data from a user buffer and put it into the circular buffer.
234 * Restrict to the amount of space available.
235 *
236 * Return the number of bytes copied.
237 */
238 static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
239 unsigned int count)
240 {
241 unsigned int len;
242
243 if (pb == NULL)
244 return 0;
245
246 len = pl2303_buf_space_avail(pb);
247 if (count > len)
248 count = len;
249
250 if (count == 0)
251 return 0;
252
253 len = pb->buf_buf + pb->buf_size - pb->buf_put;
254 if (count > len) {
255 memcpy(pb->buf_put, buf, len);
256 memcpy(pb->buf_buf, buf+len, count - len);
257 pb->buf_put = pb->buf_buf + count - len;
258 } else {
259 memcpy(pb->buf_put, buf, count);
260 if (count < len)
261 pb->buf_put += count;
262 else /* count == len */
263 pb->buf_put = pb->buf_buf;
264 }
265
266 return count;
267 }
268
269 /*
270 * pl2303_buf_get
271 *
272 * Get data from the circular buffer and copy to the given buffer.
273 * Restrict to the amount of data available.
274 *
275 * Return the number of bytes copied.
276 */
277 static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
278 unsigned int count)
279 {
280 unsigned int len;
281
282 if (pb == NULL)
283 return 0;
284
285 len = pl2303_buf_data_avail(pb);
286 if (count > len)
287 count = len;
288
289 if (count == 0)
290 return 0;
291
292 len = pb->buf_buf + pb->buf_size - pb->buf_get;
293 if (count > len) {
294 memcpy(buf, pb->buf_get, len);
295 memcpy(buf+len, pb->buf_buf, count - len);
296 pb->buf_get = pb->buf_buf + count - len;
297 } else {
298 memcpy(buf, pb->buf_get, count);
299 if (count < len)
300 pb->buf_get += count;
301 else /* count == len */
302 pb->buf_get = pb->buf_buf;
303 }
304
305 return count;
306 }
307
308 static int pl2303_startup(struct usb_serial *serial)
309 {
310 struct pl2303_private *priv;
311 enum pl2303_type type = type_0;
312 int i;
313
314 if (serial->dev->descriptor.bDeviceClass == 0x02)
315 type = type_0;
316 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
317 type = HX;
318 else if (serial->dev->descriptor.bDeviceClass == 0x00)
319 type = type_1;
320 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
321 type = type_1;
322 dbg("device type: %d", type);
323
324 for (i = 0; i < serial->num_ports; ++i) {
325 priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
326 if (!priv)
327 goto cleanup;
328 spin_lock_init(&priv->lock);
329 priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
330 if (priv->buf == NULL) {
331 kfree(priv);
332 goto cleanup;
333 }
334 init_waitqueue_head(&priv->delta_msr_wait);
335 priv->type = type;
336 usb_set_serial_port_data(serial->port[i], priv);
337 }
338 return 0;
339
340 cleanup:
341 for (--i; i>=0; --i) {
342 priv = usb_get_serial_port_data(serial->port[i]);
343 pl2303_buf_free(priv->buf);
344 kfree(priv);
345 usb_set_serial_port_data(serial->port[i], NULL);
346 }
347 return -ENOMEM;
348 }
349
350 static int set_control_lines(struct usb_device *dev, u8 value)
351 {
352 int retval;
353
354 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
355 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
356 value, 0, NULL, 0, 100);
357 dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
358 return retval;
359 }
360
361 static void pl2303_send(struct usb_serial_port *port)
362 {
363 int count, result;
364 struct pl2303_private *priv = usb_get_serial_port_data(port);
365 unsigned long flags;
366
367 dbg("%s - port %d", __FUNCTION__, port->number);
368
369 spin_lock_irqsave(&priv->lock, flags);
370
371 if (priv->write_urb_in_use) {
372 spin_unlock_irqrestore(&priv->lock, flags);
373 return;
374 }
375
376 count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
377 port->bulk_out_size);
378
379 if (count == 0) {
380 spin_unlock_irqrestore(&priv->lock, flags);
381 return;
382 }
383
384 priv->write_urb_in_use = 1;
385
386 spin_unlock_irqrestore(&priv->lock, flags);
387
388 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count,
389 port->write_urb->transfer_buffer);
390
391 port->write_urb->transfer_buffer_length = count;
392 port->write_urb->dev = port->serial->dev;
393 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
394 if (result) {
395 dev_err(&port->dev, "%s - failed submitting write urb,"
396 " error %d\n", __FUNCTION__, result);
397 priv->write_urb_in_use = 0;
398 // TODO: reschedule pl2303_send
399 }
400
401 usb_serial_port_softint(port);
402 }
403
404 static int pl2303_write(struct usb_serial_port *port, const unsigned char *buf,
405 int count)
406 {
407 struct pl2303_private *priv = usb_get_serial_port_data(port);
408 unsigned long flags;
409
410 dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
411
412 if (!count)
413 return count;
414
415 spin_lock_irqsave(&priv->lock, flags);
416 count = pl2303_buf_put(priv->buf, buf, count);
417 spin_unlock_irqrestore(&priv->lock, flags);
418
419 pl2303_send(port);
420
421 return count;
422 }
423
424 static int pl2303_write_room(struct usb_serial_port *port)
425 {
426 struct pl2303_private *priv = usb_get_serial_port_data(port);
427 int room = 0;
428 unsigned long flags;
429
430 dbg("%s - port %d", __FUNCTION__, port->number);
431
432 spin_lock_irqsave(&priv->lock, flags);
433 room = pl2303_buf_space_avail(priv->buf);
434 spin_unlock_irqrestore(&priv->lock, flags);
435
436 dbg("%s - returns %d", __FUNCTION__, room);
437 return room;
438 }
439
440 static int pl2303_chars_in_buffer(struct usb_serial_port *port)
441 {
442 struct pl2303_private *priv = usb_get_serial_port_data(port);
443 int chars = 0;
444 unsigned long flags;
445
446 dbg("%s - port %d", __FUNCTION__, port->number);
447
448 spin_lock_irqsave(&priv->lock, flags);
449 chars = pl2303_buf_data_avail(priv->buf);
450 spin_unlock_irqrestore(&priv->lock, flags);
451
452 dbg("%s - returns %d", __FUNCTION__, chars);
453 return chars;
454 }
455
456 static void pl2303_set_termios(struct usb_serial_port *port,
457 struct termios *old_termios)
458 {
459 struct usb_serial *serial = port->serial;
460 struct pl2303_private *priv = usb_get_serial_port_data(port);
461 unsigned long flags;
462 unsigned int cflag;
463 unsigned char *buf;
464 int baud;
465 int i;
466 u8 control;
467
468 dbg("%s - port %d", __FUNCTION__, port->number);
469
470 if ((!port->tty) || (!port->tty->termios)) {
471 dbg("%s - no tty structures", __FUNCTION__);
472 return;
473 }
474
475 spin_lock_irqsave(&priv->lock, flags);
476 if (!priv->termios_initialized) {
477 *(port->tty->termios) = tty_std_termios;
478 port->tty->termios->c_cflag = B9600 | CS8 | CREAD |
479 HUPCL | CLOCAL;
480 priv->termios_initialized = 1;
481 }
482 spin_unlock_irqrestore(&priv->lock, flags);
483
484 cflag = port->tty->termios->c_cflag;
485 /* check that they really want us to change something */
486 if (old_termios) {
487 if ((cflag == old_termios->c_cflag) &&
488 (RELEVANT_IFLAG(port->tty->termios->c_iflag) ==
489 RELEVANT_IFLAG(old_termios->c_iflag))) {
490 dbg("%s - nothing to change...", __FUNCTION__);
491 return;
492 }
493 }
494
495 buf = kzalloc(7, GFP_KERNEL);
496 if (!buf) {
497 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
498 return;
499 }
500
501 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
502 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
503 0, 0, buf, 7, 100);
504 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
505 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
506
507 if (cflag & CSIZE) {
508 switch (cflag & CSIZE) {
509 case CS5: buf[6] = 5; break;
510 case CS6: buf[6] = 6; break;
511 case CS7: buf[6] = 7; break;
512 default:
513 case CS8: buf[6] = 8; break;
514 }
515 dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
516 }
517
518 baud = 0;
519 switch (cflag & CBAUD) {
520 case B0: baud = 0; break;
521 case B75: baud = 75; break;
522 case B150: baud = 150; break;
523 case B300: baud = 300; break;
524 case B600: baud = 600; break;
525 case B1200: baud = 1200; break;
526 case B1800: baud = 1800; break;
527 case B2400: baud = 2400; break;
528 case B4800: baud = 4800; break;
529 case B9600: baud = 9600; break;
530 case B19200: baud = 19200; break;
531 case B38400: baud = 38400; break;
532 case B57600: baud = 57600; break;
533 case B115200: baud = 115200; break;
534 case B230400: baud = 230400; break;
535 case B460800: baud = 460800; break;
536 default:
537 dev_err(&port->dev, "pl2303 driver does not support"
538 " the baudrate requested (fix it)\n");
539 break;
540 }
541 dbg("%s - baud = %d", __FUNCTION__, baud);
542 if (baud) {
543 buf[0] = baud & 0xff;
544 buf[1] = (baud >> 8) & 0xff;
545 buf[2] = (baud >> 16) & 0xff;
546 buf[3] = (baud >> 24) & 0xff;
547 }
548
549 /* For reference buf[4]=0 is 1 stop bits */
550 /* For reference buf[4]=1 is 1.5 stop bits */
551 /* For reference buf[4]=2 is 2 stop bits */
552 if (cflag & CSTOPB) {
553 buf[4] = 2;
554 dbg("%s - stop bits = 2", __FUNCTION__);
555 } else {
556 buf[4] = 0;
557 dbg("%s - stop bits = 1", __FUNCTION__);
558 }
559
560 if (cflag & PARENB) {
561 /* For reference buf[5]=0 is none parity */
562 /* For reference buf[5]=1 is odd parity */
563 /* For reference buf[5]=2 is even parity */
564 /* For reference buf[5]=3 is mark parity */
565 /* For reference buf[5]=4 is space parity */
566 if (cflag & PARODD) {
567 buf[5] = 1;
568 dbg("%s - parity = odd", __FUNCTION__);
569 } else {
570 buf[5] = 2;
571 dbg("%s - parity = even", __FUNCTION__);
572 }
573 } else {
574 buf[5] = 0;
575 dbg("%s - parity = none", __FUNCTION__);
576 }
577
578 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
579 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
580 0, 0, buf, 7, 100);
581 dbg("0x21:0x20:0:0 %d", i);
582
583 /* change control lines if we are switching to or from B0 */
584 spin_lock_irqsave(&priv->lock, flags);
585 control = priv->line_control;
586 if ((cflag & CBAUD) == B0)
587 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
588 else
589 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
590 if (control != priv->line_control) {
591 control = priv->line_control;
592 spin_unlock_irqrestore(&priv->lock, flags);
593 set_control_lines(serial->dev, control);
594 } else {
595 spin_unlock_irqrestore(&priv->lock, flags);
596 }
597
598 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
599
600 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
601 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
602 0, 0, buf, 7, 100);
603 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
604 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
605
606 if (cflag & CRTSCTS) {
607 __u16 index;
608 if (priv->type == HX)
609 index = 0x61;
610 else
611 index = 0x41;
612 i = usb_control_msg(serial->dev,
613 usb_sndctrlpipe(serial->dev, 0),
614 VENDOR_WRITE_REQUEST,
615 VENDOR_WRITE_REQUEST_TYPE,
616 0x0, index, NULL, 0, 100);
617 dbg("0x40:0x1:0x0:0x%x %d", index, i);
618 }
619
620 kfree(buf);
621 }
622
623 static void pl2303_close(struct usb_serial_port *port, struct file *filp)
624 {
625 struct pl2303_private *priv = usb_get_serial_port_data(port);
626 unsigned long flags;
627 unsigned int c_cflag;
628 int bps;
629 long timeout;
630 wait_queue_t wait;
631
632 dbg("%s - port %d", __FUNCTION__, port->number);
633
634 /* wait for data to drain from the buffer */
635 spin_lock_irqsave(&priv->lock, flags);
636 timeout = PL2303_CLOSING_WAIT;
637 init_waitqueue_entry(&wait, current);
638 add_wait_queue(&port->tty->write_wait, &wait);
639 for (;;) {
640 set_current_state(TASK_INTERRUPTIBLE);
641 if (pl2303_buf_data_avail(priv->buf) == 0 ||
642 timeout == 0 || signal_pending(current) ||
643 !usb_get_intfdata(port->serial->interface)) /* disconnect */
644 break;
645 spin_unlock_irqrestore(&priv->lock, flags);
646 timeout = schedule_timeout(timeout);
647 spin_lock_irqsave(&priv->lock, flags);
648 }
649 set_current_state(TASK_RUNNING);
650 remove_wait_queue(&port->tty->write_wait, &wait);
651 /* clear out any remaining data in the buffer */
652 pl2303_buf_clear(priv->buf);
653 spin_unlock_irqrestore(&priv->lock, flags);
654
655 /* wait for characters to drain from the device */
656 /* (this is long enough for the entire 256 byte */
657 /* pl2303 hardware buffer to drain with no flow */
658 /* control for data rates of 1200 bps or more, */
659 /* for lower rates we should really know how much */
660 /* data is in the buffer to compute a delay */
661 /* that is not unnecessarily long) */
662 bps = tty_get_baud_rate(port->tty);
663 if (bps > 1200)
664 timeout = max((HZ*2560)/bps,HZ/10);
665 else
666 timeout = 2*HZ;
667 schedule_timeout_interruptible(timeout);
668
669 /* shutdown our urbs */
670 dbg("%s - shutting down urbs", __FUNCTION__);
671 usb_kill_urb(port->write_urb);
672 usb_kill_urb(port->read_urb);
673 usb_kill_urb(port->interrupt_in_urb);
674
675 if (port->tty) {
676 c_cflag = port->tty->termios->c_cflag;
677 if (c_cflag & HUPCL) {
678 /* drop DTR and RTS */
679 spin_lock_irqsave(&priv->lock, flags);
680 priv->line_control = 0;
681 spin_unlock_irqrestore(&priv->lock, flags);
682 set_control_lines(port->serial->dev, 0);
683 }
684 }
685 }
686
687 static int pl2303_open(struct usb_serial_port *port, struct file *filp)
688 {
689 struct termios tmp_termios;
690 struct usb_serial *serial = port->serial;
691 struct pl2303_private *priv = usb_get_serial_port_data(port);
692 unsigned char *buf;
693 int result;
694
695 dbg("%s - port %d", __FUNCTION__, port->number);
696
697 if (priv->type != HX) {
698 usb_clear_halt(serial->dev, port->write_urb->pipe);
699 usb_clear_halt(serial->dev, port->read_urb->pipe);
700 }
701
702 buf = kmalloc(10, GFP_KERNEL);
703 if (buf==NULL)
704 return -ENOMEM;
705
706 #define FISH(a,b,c,d) \
707 result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
708 b, a, c, d, buf, 1, 100); \
709 dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
710
711 #define SOUP(a,b,c,d) \
712 result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
713 b, a, c, d, NULL, 0, 100); \
714 dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
715
716 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
717 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
718 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
719 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
720 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
721 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
722 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
723 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
724 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
725 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
726
727 if (priv->type == HX) {
728 /* HX chip */
729 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
730 /* reset upstream data pipes */
731 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
732 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
733 } else {
734 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
735 }
736
737 kfree(buf);
738
739 /* Setup termios */
740 if (port->tty) {
741 pl2303_set_termios(port, &tmp_termios);
742 }
743
744 //FIXME: need to assert RTS and DTR if CRTSCTS off
745
746 dbg("%s - submitting read urb", __FUNCTION__);
747 port->read_urb->dev = serial->dev;
748 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
749 if (result) {
750 dev_err(&port->dev, "%s - failed submitting read urb,"
751 " error %d\n", __FUNCTION__, result);
752 pl2303_close(port, NULL);
753 return -EPROTO;
754 }
755
756 dbg("%s - submitting interrupt urb", __FUNCTION__);
757 port->interrupt_in_urb->dev = serial->dev;
758 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
759 if (result) {
760 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
761 " error %d\n", __FUNCTION__, result);
762 pl2303_close(port, NULL);
763 return -EPROTO;
764 }
765 return 0;
766 }
767
768 static int pl2303_tiocmset(struct usb_serial_port *port, struct file *file,
769 unsigned int set, unsigned int clear)
770 {
771 struct pl2303_private *priv = usb_get_serial_port_data(port);
772 unsigned long flags;
773 u8 control;
774
775 if (!usb_get_intfdata(port->serial->interface))
776 return -ENODEV;
777
778 spin_lock_irqsave(&priv->lock, flags);
779 if (set & TIOCM_RTS)
780 priv->line_control |= CONTROL_RTS;
781 if (set & TIOCM_DTR)
782 priv->line_control |= CONTROL_DTR;
783 if (clear & TIOCM_RTS)
784 priv->line_control &= ~CONTROL_RTS;
785 if (clear & TIOCM_DTR)
786 priv->line_control &= ~CONTROL_DTR;
787 control = priv->line_control;
788 spin_unlock_irqrestore(&priv->lock, flags);
789
790 return set_control_lines(port->serial->dev, control);
791 }
792
793 static int pl2303_tiocmget(struct usb_serial_port *port, struct file *file)
794 {
795 struct pl2303_private *priv = usb_get_serial_port_data(port);
796 unsigned long flags;
797 unsigned int mcr;
798 unsigned int status;
799 unsigned int result;
800
801 dbg("%s (%d)", __FUNCTION__, port->number);
802
803 if (!usb_get_intfdata(port->serial->interface))
804 return -ENODEV;
805
806 spin_lock_irqsave(&priv->lock, flags);
807 mcr = priv->line_control;
808 status = priv->line_status;
809 spin_unlock_irqrestore(&priv->lock, flags);
810
811 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
812 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
813 | ((status & UART_CTS) ? TIOCM_CTS : 0)
814 | ((status & UART_DSR) ? TIOCM_DSR : 0)
815 | ((status & UART_RING) ? TIOCM_RI : 0)
816 | ((status & UART_DCD) ? TIOCM_CD : 0);
817
818 dbg("%s - result = %x", __FUNCTION__, result);
819
820 return result;
821 }
822
823 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
824 {
825 struct pl2303_private *priv = usb_get_serial_port_data(port);
826 unsigned long flags;
827 unsigned int prevstatus;
828 unsigned int status;
829 unsigned int changed;
830
831 spin_lock_irqsave(&priv->lock, flags);
832 prevstatus = priv->line_status;
833 spin_unlock_irqrestore(&priv->lock, flags);
834
835 while (1) {
836 interruptible_sleep_on(&priv->delta_msr_wait);
837 /* see if a signal did it */
838 if (signal_pending(current))
839 return -ERESTARTSYS;
840
841 spin_lock_irqsave(&priv->lock, flags);
842 status = priv->line_status;
843 spin_unlock_irqrestore(&priv->lock, flags);
844
845 changed=prevstatus^status;
846
847 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
848 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
849 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
850 ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
851 return 0;
852 }
853 prevstatus = status;
854 }
855 /* NOTREACHED */
856 return 0;
857 }
858
859 static int pl2303_ioctl(struct usb_serial_port *port, struct file *file,
860 unsigned int cmd, unsigned long arg)
861 {
862 dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
863
864 switch (cmd) {
865 case TIOCMIWAIT:
866 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
867 return wait_modem_info(port, arg);
868
869 default:
870 dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
871 break;
872 }
873
874 return -ENOIOCTLCMD;
875 }
876
877 static void pl2303_break_ctl(struct usb_serial_port *port, int break_state)
878 {
879 struct usb_serial *serial = port->serial;
880 u16 state;
881 int result;
882
883 dbg("%s - port %d", __FUNCTION__, port->number);
884
885 if (break_state == 0)
886 state = BREAK_OFF;
887 else
888 state = BREAK_ON;
889 dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
890
891 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
892 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
893 0, NULL, 0, 100);
894 if (result)
895 dbg("%s - error sending break = %d", __FUNCTION__, result);
896 }
897
898 static void pl2303_shutdown(struct usb_serial *serial)
899 {
900 int i;
901 struct pl2303_private *priv;
902
903 dbg("%s", __FUNCTION__);
904
905 for (i = 0; i < serial->num_ports; ++i) {
906 priv = usb_get_serial_port_data(serial->port[i]);
907 if (priv) {
908 pl2303_buf_free(priv->buf);
909 kfree(priv);
910 usb_set_serial_port_data(serial->port[i], NULL);
911 }
912 }
913 }
914
915 static void pl2303_update_line_status(struct usb_serial_port *port,
916 unsigned char *data,
917 unsigned int actual_length)
918 {
919
920 struct pl2303_private *priv = usb_get_serial_port_data(port);
921 unsigned long flags;
922 u8 status_idx = UART_STATE;
923 u8 length = UART_STATE + 1;
924 u16 idv, idp;
925
926 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
927 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
928
929
930 if (idv == SIEMENS_VENDOR_ID) {
931 if (idp == SIEMENS_PRODUCT_ID_X65 ||
932 idp == SIEMENS_PRODUCT_ID_SX1 ||
933 idp == SIEMENS_PRODUCT_ID_X75) {
934
935 length = 1;
936 status_idx = 0;
937 }
938 }
939
940 if (actual_length < length)
941 return;
942
943 /* Save off the uart status for others to look at */
944 spin_lock_irqsave(&priv->lock, flags);
945 priv->line_status = data[status_idx];
946 spin_unlock_irqrestore(&priv->lock, flags);
947 wake_up_interruptible(&priv->delta_msr_wait);
948 }
949
950 static void pl2303_read_int_callback(struct urb *urb, struct pt_regs *regs)
951 {
952 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
953 unsigned char *data = urb->transfer_buffer;
954 unsigned int actual_length = urb->actual_length;
955 int status;
956
957 dbg("%s (%d)", __FUNCTION__, port->number);
958
959 switch (urb->status) {
960 case 0:
961 /* success */
962 break;
963 case -ECONNRESET:
964 case -ENOENT:
965 case -ESHUTDOWN:
966 /* this urb is terminated, clean up */
967 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
968 urb->status);
969 return;
970 default:
971 dbg("%s - nonzero urb status received: %d", __FUNCTION__,
972 urb->status);
973 goto exit;
974 }
975
976 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
977 urb->actual_length, urb->transfer_buffer);
978
979 pl2303_update_line_status(port, data, actual_length);
980
981 exit:
982 status = usb_submit_urb(urb, GFP_ATOMIC);
983 if (status)
984 dev_err(&urb->dev->dev,
985 "%s - usb_submit_urb failed with result %d\n",
986 __FUNCTION__, status);
987 }
988
989 static void pl2303_read_bulk_callback(struct urb *urb, struct pt_regs *regs)
990 {
991 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
992 struct pl2303_private *priv = usb_get_serial_port_data(port);
993 struct tty_struct *tty;
994 unsigned char *data = urb->transfer_buffer;
995 unsigned long flags;
996 int i;
997 int result;
998 u8 status;
999 char tty_flag;
1000
1001 dbg("%s - port %d", __FUNCTION__, port->number);
1002
1003 if (urb->status) {
1004 dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
1005 if (!port->open_count) {
1006 dbg("%s - port is closed, exiting.", __FUNCTION__);
1007 return;
1008 }
1009 if (urb->status == -EPROTO) {
1010 /* PL2303 mysteriously fails with -EPROTO reschedule
1011 * the read */
1012 dbg("%s - caught -EPROTO, resubmitting the urb",
1013 __FUNCTION__);
1014 urb->status = 0;
1015 urb->dev = port->serial->dev;
1016 result = usb_submit_urb(urb, GFP_ATOMIC);
1017 if (result)
1018 dev_err(&urb->dev->dev, "%s - failed"
1019 " resubmitting read urb, error %d\n",
1020 __FUNCTION__, result);
1021 return;
1022 }
1023 dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
1024 return;
1025 }
1026
1027 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
1028 urb->actual_length, data);
1029
1030 /* get tty_flag from status */
1031 tty_flag = TTY_NORMAL;
1032
1033 spin_lock_irqsave(&priv->lock, flags);
1034 status = priv->line_status;
1035 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
1036 spin_unlock_irqrestore(&priv->lock, flags);
1037 wake_up_interruptible(&priv->delta_msr_wait);
1038
1039 /* break takes precedence over parity, */
1040 /* which takes precedence over framing errors */
1041 if (status & UART_BREAK_ERROR )
1042 tty_flag = TTY_BREAK;
1043 else if (status & UART_PARITY_ERROR)
1044 tty_flag = TTY_PARITY;
1045 else if (status & UART_FRAME_ERROR)
1046 tty_flag = TTY_FRAME;
1047 dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
1048
1049 tty = port->tty;
1050 if (tty && urb->actual_length) {
1051 tty_buffer_request_room(tty, urb->actual_length + 1);
1052 /* overrun is special, not associated with a char */
1053 if (status & UART_OVERRUN_ERROR)
1054 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
1055 for (i = 0; i < urb->actual_length; ++i)
1056 tty_insert_flip_char(tty, data[i], tty_flag);
1057 tty_flip_buffer_push(tty);
1058 }
1059
1060 /* Schedule the next read _if_ we are still open */
1061 if (port->open_count) {
1062 urb->dev = port->serial->dev;
1063 result = usb_submit_urb(urb, GFP_ATOMIC);
1064 if (result)
1065 dev_err(&urb->dev->dev, "%s - failed resubmitting"
1066 " read urb, error %d\n", __FUNCTION__, result);
1067 }
1068
1069 return;
1070 }
1071
1072 static void pl2303_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
1073 {
1074 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
1075 struct pl2303_private *priv = usb_get_serial_port_data(port);
1076 int result;
1077
1078 dbg("%s - port %d", __FUNCTION__, port->number);
1079
1080 switch (urb->status) {
1081 case 0:
1082 /* success */
1083 break;
1084 case -ECONNRESET:
1085 case -ENOENT:
1086 case -ESHUTDOWN:
1087 /* this urb is terminated, clean up */
1088 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
1089 urb->status);
1090 priv->write_urb_in_use = 0;
1091 return;
1092 default:
1093 /* error in the urb, so we have to resubmit it */
1094 dbg("%s - Overflow in write", __FUNCTION__);
1095 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__,
1096 urb->status);
1097 port->write_urb->transfer_buffer_length = 1;
1098 port->write_urb->dev = port->serial->dev;
1099 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1100 if (result)
1101 dev_err(&urb->dev->dev, "%s - failed resubmitting write"
1102 " urb, error %d\n", __FUNCTION__, result);
1103 else
1104 return;
1105 }
1106
1107 priv->write_urb_in_use = 0;
1108
1109 /* send any buffered data */
1110 pl2303_send(port);
1111 }
1112
1113 /* All of the device info needed for the PL2303 SIO serial converter */
1114 static struct usb_serial_driver pl2303_device = {
1115 .driver = {
1116 .owner = THIS_MODULE,
1117 .name = "pl2303",
1118 },
1119 .id_table = id_table,
1120 .num_interrupt_in = NUM_DONT_CARE,
1121 .num_bulk_in = 1,
1122 .num_bulk_out = 1,
1123 .num_ports = 1,
1124 .open = pl2303_open,
1125 .close = pl2303_close,
1126 .write = pl2303_write,
1127 .ioctl = pl2303_ioctl,
1128 .break_ctl = pl2303_break_ctl,
1129 .set_termios = pl2303_set_termios,
1130 .tiocmget = pl2303_tiocmget,
1131 .tiocmset = pl2303_tiocmset,
1132 .read_bulk_callback = pl2303_read_bulk_callback,
1133 .read_int_callback = pl2303_read_int_callback,
1134 .write_bulk_callback = pl2303_write_bulk_callback,
1135 .write_room = pl2303_write_room,
1136 .chars_in_buffer = pl2303_chars_in_buffer,
1137 .attach = pl2303_startup,
1138 .shutdown = pl2303_shutdown,
1139 };
1140
1141 static int __init pl2303_init(void)
1142 {
1143 int retval;
1144
1145 retval = usb_serial_register(&pl2303_device);
1146 if (retval)
1147 goto failed_usb_serial_register;
1148 retval = usb_register(&pl2303_driver);
1149 if (retval)
1150 goto failed_usb_register;
1151 info(DRIVER_DESC);
1152 return 0;
1153 failed_usb_register:
1154 usb_serial_deregister(&pl2303_device);
1155 failed_usb_serial_register:
1156 return retval;
1157 }
1158
1159 static void __exit pl2303_exit(void)
1160 {
1161 usb_deregister(&pl2303_driver);
1162 usb_serial_deregister(&pl2303_device);
1163 }
1164
1165 module_init(pl2303_init);
1166 module_exit(pl2303_exit);
1167
1168 MODULE_DESCRIPTION(DRIVER_DESC);
1169 MODULE_LICENSE("GPL");
1170
1171 module_param(debug, bool, S_IRUGO | S_IWUSR);
1172 MODULE_PARM_DESC(debug, "Debug enabled or not");
1173
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