?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
revert-mm-fix-blkdev-size-calculation-in-generic_write_checks
[linux-2.6/linux-trees-mm.git] / drivers / usb / serial / pl2303.c
blob2cd3f1d4b687f834a529e9cf2ccac2688ff123dd
1 /*
2 * Prolific PL2303 USB to serial adaptor driver
3 *
4 * Copyright (C) 2001-2007 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
10 * modify it under the terms of the GNU General Public License version
11 * 2 as published by the Free Software Foundation.
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(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
60 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
61 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
62 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
63 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
64 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
65 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
66 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
67 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
68 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
69 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
70 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
71 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
72 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
73 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
74 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
75 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
76 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
77 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
78 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
79 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
80 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
81 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
82 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
83 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
84 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
85 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
86 { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
87 { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_ID) },
88 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
89 { } /* Terminating entry */
90 };
91
92 MODULE_DEVICE_TABLE(usb, id_table);
93
94 static struct usb_driver pl2303_driver = {
95 .name = "pl2303",
96 .probe = usb_serial_probe,
97 .disconnect = usb_serial_disconnect,
98 .id_table = id_table,
99 .no_dynamic_id = 1,
100 };
101
102 #define SET_LINE_REQUEST_TYPE 0x21
103 #define SET_LINE_REQUEST 0x20
104
105 #define SET_CONTROL_REQUEST_TYPE 0x21
106 #define SET_CONTROL_REQUEST 0x22
107 #define CONTROL_DTR 0x01
108 #define CONTROL_RTS 0x02
109
110 #define BREAK_REQUEST_TYPE 0x21
111 #define BREAK_REQUEST 0x23
112 #define BREAK_ON 0xffff
113 #define BREAK_OFF 0x0000
114
115 #define GET_LINE_REQUEST_TYPE 0xa1
116 #define GET_LINE_REQUEST 0x21
117
118 #define VENDOR_WRITE_REQUEST_TYPE 0x40
119 #define VENDOR_WRITE_REQUEST 0x01
120
121 #define VENDOR_READ_REQUEST_TYPE 0xc0
122 #define VENDOR_READ_REQUEST 0x01
123
124 #define UART_STATE 0x08
125 #define UART_STATE_TRANSIENT_MASK 0x74
126 #define UART_DCD 0x01
127 #define UART_DSR 0x02
128 #define UART_BREAK_ERROR 0x04
129 #define UART_RING 0x08
130 #define UART_FRAME_ERROR 0x10
131 #define UART_PARITY_ERROR 0x20
132 #define UART_OVERRUN_ERROR 0x40
133 #define UART_CTS 0x80
134
135
136 enum pl2303_type {
137 type_0, /* don't know the difference between type 0 and */
138 type_1, /* type 1, until someone from prolific tells us... */
139 HX, /* HX version of the pl2303 chip */
140 };
141
142 struct pl2303_private {
143 spinlock_t lock;
144 struct pl2303_buf *buf;
145 int write_urb_in_use;
146 wait_queue_head_t delta_msr_wait;
147 u8 line_control;
148 u8 line_status;
149 u8 termios_initialized;
150 enum pl2303_type type;
151 };
152
153 /*
154 * pl2303_buf_alloc
155 *
156 * Allocate a circular buffer and all associated memory.
157 */
158 static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
159 {
160 struct pl2303_buf *pb;
161
162 if (size == 0)
163 return NULL;
164
165 pb = kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
166 if (pb == NULL)
167 return NULL;
168
169 pb->buf_buf = kmalloc(size, GFP_KERNEL);
170 if (pb->buf_buf == NULL) {
171 kfree(pb);
172 return NULL;
173 }
174
175 pb->buf_size = size;
176 pb->buf_get = pb->buf_put = pb->buf_buf;
177
178 return pb;
179 }
180
181 /*
182 * pl2303_buf_free
183 *
184 * Free the buffer and all associated memory.
185 */
186 static void pl2303_buf_free(struct pl2303_buf *pb)
187 {
188 if (pb) {
189 kfree(pb->buf_buf);
190 kfree(pb);
191 }
192 }
193
194 /*
195 * pl2303_buf_clear
196 *
197 * Clear out all data in the circular buffer.
198 */
199 static void pl2303_buf_clear(struct pl2303_buf *pb)
200 {
201 if (pb != NULL)
202 pb->buf_get = pb->buf_put;
203 /* equivalent to a get of all data available */
204 }
205
206 /*
207 * pl2303_buf_data_avail
208 *
209 * Return the number of bytes of data available in the circular
210 * buffer.
211 */
212 static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
213 {
214 if (pb == NULL)
215 return 0;
216
217 return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
218 }
219
220 /*
221 * pl2303_buf_space_avail
222 *
223 * Return the number of bytes of space available in the circular
224 * buffer.
225 */
226 static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
227 {
228 if (pb == NULL)
229 return 0;
230
231 return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
232 }
233
234 /*
235 * pl2303_buf_put
236 *
237 * Copy data data from a user buffer and put it into the circular buffer.
238 * Restrict to the amount of space available.
239 *
240 * Return the number of bytes copied.
241 */
242 static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
243 unsigned int count)
244 {
245 unsigned int len;
246
247 if (pb == NULL)
248 return 0;
249
250 len = pl2303_buf_space_avail(pb);
251 if (count > len)
252 count = len;
253
254 if (count == 0)
255 return 0;
256
257 len = pb->buf_buf + pb->buf_size - pb->buf_put;
258 if (count > len) {
259 memcpy(pb->buf_put, buf, len);
260 memcpy(pb->buf_buf, buf+len, count - len);
261 pb->buf_put = pb->buf_buf + count - len;
262 } else {
263 memcpy(pb->buf_put, buf, count);
264 if (count < len)
265 pb->buf_put += count;
266 else /* count == len */
267 pb->buf_put = pb->buf_buf;
268 }
269
270 return count;
271 }
272
273 /*
274 * pl2303_buf_get
275 *
276 * Get data from the circular buffer and copy to the given buffer.
277 * Restrict to the amount of data available.
278 *
279 * Return the number of bytes copied.
280 */
281 static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
282 unsigned int count)
283 {
284 unsigned int len;
285
286 if (pb == NULL)
287 return 0;
288
289 len = pl2303_buf_data_avail(pb);
290 if (count > len)
291 count = len;
292
293 if (count == 0)
294 return 0;
295
296 len = pb->buf_buf + pb->buf_size - pb->buf_get;
297 if (count > len) {
298 memcpy(buf, pb->buf_get, len);
299 memcpy(buf+len, pb->buf_buf, count - len);
300 pb->buf_get = pb->buf_buf + count - len;
301 } else {
302 memcpy(buf, pb->buf_get, count);
303 if (count < len)
304 pb->buf_get += count;
305 else /* count == len */
306 pb->buf_get = pb->buf_buf;
307 }
308
309 return count;
310 }
311
312 static int pl2303_startup(struct usb_serial *serial)
313 {
314 struct pl2303_private *priv;
315 enum pl2303_type type = type_0;
316 int i;
317
318 if (serial->dev->descriptor.bDeviceClass == 0x02)
319 type = type_0;
320 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
321 type = HX;
322 else if (serial->dev->descriptor.bDeviceClass == 0x00)
323 type = type_1;
324 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
325 type = type_1;
326 dbg("device type: %d", type);
327
328 for (i = 0; i < serial->num_ports; ++i) {
329 priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
330 if (!priv)
331 goto cleanup;
332 spin_lock_init(&priv->lock);
333 priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
334 if (priv->buf == NULL) {
335 kfree(priv);
336 goto cleanup;
337 }
338 init_waitqueue_head(&priv->delta_msr_wait);
339 priv->type = type;
340 usb_set_serial_port_data(serial->port[i], priv);
341 }
342 return 0;
343
344 cleanup:
345 for (--i; i>=0; --i) {
346 priv = usb_get_serial_port_data(serial->port[i]);
347 pl2303_buf_free(priv->buf);
348 kfree(priv);
349 usb_set_serial_port_data(serial->port[i], NULL);
350 }
351 return -ENOMEM;
352 }
353
354 static int set_control_lines(struct usb_device *dev, u8 value)
355 {
356 int retval;
357
358 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
359 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
360 value, 0, NULL, 0, 100);
361 dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
362 return retval;
363 }
364
365 static void pl2303_send(struct usb_serial_port *port)
366 {
367 int count, result;
368 struct pl2303_private *priv = usb_get_serial_port_data(port);
369 unsigned long flags;
370
371 dbg("%s - port %d", __FUNCTION__, port->number);
372
373 spin_lock_irqsave(&priv->lock, flags);
374
375 if (priv->write_urb_in_use) {
376 spin_unlock_irqrestore(&priv->lock, flags);
377 return;
378 }
379
380 count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
381 port->bulk_out_size);
382
383 if (count == 0) {
384 spin_unlock_irqrestore(&priv->lock, flags);
385 return;
386 }
387
388 priv->write_urb_in_use = 1;
389
390 spin_unlock_irqrestore(&priv->lock, flags);
391
392 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count,
393 port->write_urb->transfer_buffer);
394
395 port->write_urb->transfer_buffer_length = count;
396 port->write_urb->dev = port->serial->dev;
397 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
398 if (result) {
399 dev_err(&port->dev, "%s - failed submitting write urb,"
400 " error %d\n", __FUNCTION__, result);
401 priv->write_urb_in_use = 0;
402 // TODO: reschedule pl2303_send
403 }
404
405 usb_serial_port_softint(port);
406 }
407
408 static int pl2303_write(struct usb_serial_port *port, const unsigned char *buf,
409 int count)
410 {
411 struct pl2303_private *priv = usb_get_serial_port_data(port);
412 unsigned long flags;
413
414 dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
415
416 if (!count)
417 return count;
418
419 spin_lock_irqsave(&priv->lock, flags);
420 count = pl2303_buf_put(priv->buf, buf, count);
421 spin_unlock_irqrestore(&priv->lock, flags);
422
423 pl2303_send(port);
424
425 return count;
426 }
427
428 static int pl2303_write_room(struct usb_serial_port *port)
429 {
430 struct pl2303_private *priv = usb_get_serial_port_data(port);
431 int room = 0;
432 unsigned long flags;
433
434 dbg("%s - port %d", __FUNCTION__, port->number);
435
436 spin_lock_irqsave(&priv->lock, flags);
437 room = pl2303_buf_space_avail(priv->buf);
438 spin_unlock_irqrestore(&priv->lock, flags);
439
440 dbg("%s - returns %d", __FUNCTION__, room);
441 return room;
442 }
443
444 static int pl2303_chars_in_buffer(struct usb_serial_port *port)
445 {
446 struct pl2303_private *priv = usb_get_serial_port_data(port);
447 int chars = 0;
448 unsigned long flags;
449
450 dbg("%s - port %d", __FUNCTION__, port->number);
451
452 spin_lock_irqsave(&priv->lock, flags);
453 chars = pl2303_buf_data_avail(priv->buf);
454 spin_unlock_irqrestore(&priv->lock, flags);
455
456 dbg("%s - returns %d", __FUNCTION__, chars);
457 return chars;
458 }
459
460 static void pl2303_set_termios(struct usb_serial_port *port,
461 struct ktermios *old_termios)
462 {
463 struct usb_serial *serial = port->serial;
464 struct pl2303_private *priv = usb_get_serial_port_data(port);
465 unsigned long flags;
466 unsigned int cflag;
467 unsigned char *buf;
468 int baud;
469 int i;
470 u8 control;
471
472 dbg("%s - port %d", __FUNCTION__, port->number);
473
474 spin_lock_irqsave(&priv->lock, flags);
475 if (!priv->termios_initialized) {
476 *(port->tty->termios) = tty_std_termios;
477 port->tty->termios->c_cflag = B9600 | CS8 | CREAD |
478 HUPCL | CLOCAL;
479 port->tty->termios->c_ispeed = 9600;
480 port->tty->termios->c_ospeed = 9600;
481 priv->termios_initialized = 1;
482 }
483 spin_unlock_irqrestore(&priv->lock, flags);
484
485 cflag = port->tty->termios->c_cflag;
486
487 buf = kzalloc(7, GFP_KERNEL);
488 if (!buf) {
489 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
490 return;
491 }
492
493 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
494 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
495 0, 0, buf, 7, 100);
496 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
497 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
498
499 if (cflag & CSIZE) {
500 switch (cflag & CSIZE) {
501 case CS5: buf[6] = 5; break;
502 case CS6: buf[6] = 6; break;
503 case CS7: buf[6] = 7; break;
504 default:
505 case CS8: buf[6] = 8; break;
506 }
507 dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
508 }
509
510 baud = tty_get_baud_rate(port->tty);;
511 dbg("%s - baud = %d", __FUNCTION__, baud);
512 if (baud) {
513 buf[0] = baud & 0xff;
514 buf[1] = (baud >> 8) & 0xff;
515 buf[2] = (baud >> 16) & 0xff;
516 buf[3] = (baud >> 24) & 0xff;
517 }
518
519 /* For reference buf[4]=0 is 1 stop bits */
520 /* For reference buf[4]=1 is 1.5 stop bits */
521 /* For reference buf[4]=2 is 2 stop bits */
522 if (cflag & CSTOPB) {
523 buf[4] = 2;
524 dbg("%s - stop bits = 2", __FUNCTION__);
525 } else {
526 buf[4] = 0;
527 dbg("%s - stop bits = 1", __FUNCTION__);
528 }
529
530 if (cflag & PARENB) {
531 /* For reference buf[5]=0 is none parity */
532 /* For reference buf[5]=1 is odd parity */
533 /* For reference buf[5]=2 is even parity */
534 /* For reference buf[5]=3 is mark parity */
535 /* For reference buf[5]=4 is space parity */
536 if (cflag & PARODD) {
537 buf[5] = 1;
538 dbg("%s - parity = odd", __FUNCTION__);
539 } else {
540 buf[5] = 2;
541 dbg("%s - parity = even", __FUNCTION__);
542 }
543 } else {
544 buf[5] = 0;
545 dbg("%s - parity = none", __FUNCTION__);
546 }
547
548 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
549 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
550 0, 0, buf, 7, 100);
551 dbg("0x21:0x20:0:0 %d", i);
552
553 /* change control lines if we are switching to or from B0 */
554 spin_lock_irqsave(&priv->lock, flags);
555 control = priv->line_control;
556 if ((cflag & CBAUD) == B0)
557 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
558 else
559 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
560 if (control != priv->line_control) {
561 control = priv->line_control;
562 spin_unlock_irqrestore(&priv->lock, flags);
563 set_control_lines(serial->dev, control);
564 } else {
565 spin_unlock_irqrestore(&priv->lock, flags);
566 }
567
568 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
569
570 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
571 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
572 0, 0, buf, 7, 100);
573 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
574 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
575
576 if (cflag & CRTSCTS) {
577 __u16 index;
578 if (priv->type == HX)
579 index = 0x61;
580 else
581 index = 0x41;
582 i = usb_control_msg(serial->dev,
583 usb_sndctrlpipe(serial->dev, 0),
584 VENDOR_WRITE_REQUEST,
585 VENDOR_WRITE_REQUEST_TYPE,
586 0x0, index, NULL, 0, 100);
587 dbg("0x40:0x1:0x0:0x%x %d", index, i);
588 } else {
589 i = usb_control_msg(serial->dev,
590 usb_sndctrlpipe(serial->dev, 0),
591 VENDOR_WRITE_REQUEST,
592 VENDOR_WRITE_REQUEST_TYPE,
593 0x0, 0x0, NULL, 0, 100);
594 dbg ("0x40:0x1:0x0:0x0 %d", i);
595 }
596
597 /* FIXME: Need to read back resulting baud rate */
598 if (baud)
599 tty_encode_baud_rate(port->tty, baud, baud);
600
601 kfree(buf);
602 }
603
604 static void pl2303_close(struct usb_serial_port *port, struct file *filp)
605 {
606 struct pl2303_private *priv = usb_get_serial_port_data(port);
607 unsigned long flags;
608 unsigned int c_cflag;
609 int bps;
610 long timeout;
611 wait_queue_t wait;
612
613 dbg("%s - port %d", __FUNCTION__, port->number);
614
615 /* wait for data to drain from the buffer */
616 spin_lock_irqsave(&priv->lock, flags);
617 timeout = PL2303_CLOSING_WAIT;
618 init_waitqueue_entry(&wait, current);
619 add_wait_queue(&port->tty->write_wait, &wait);
620 for (;;) {
621 set_current_state(TASK_INTERRUPTIBLE);
622 if (pl2303_buf_data_avail(priv->buf) == 0 ||
623 timeout == 0 || signal_pending(current) ||
624 !usb_get_intfdata(port->serial->interface)) /* disconnect */
625 break;
626 spin_unlock_irqrestore(&priv->lock, flags);
627 timeout = schedule_timeout(timeout);
628 spin_lock_irqsave(&priv->lock, flags);
629 }
630 set_current_state(TASK_RUNNING);
631 remove_wait_queue(&port->tty->write_wait, &wait);
632 /* clear out any remaining data in the buffer */
633 pl2303_buf_clear(priv->buf);
634 spin_unlock_irqrestore(&priv->lock, flags);
635
636 /* wait for characters to drain from the device */
637 /* (this is long enough for the entire 256 byte */
638 /* pl2303 hardware buffer to drain with no flow */
639 /* control for data rates of 1200 bps or more, */
640 /* for lower rates we should really know how much */
641 /* data is in the buffer to compute a delay */
642 /* that is not unnecessarily long) */
643 bps = tty_get_baud_rate(port->tty);
644 if (bps > 1200)
645 timeout = max((HZ*2560)/bps,HZ/10);
646 else
647 timeout = 2*HZ;
648 schedule_timeout_interruptible(timeout);
649
650 /* shutdown our urbs */
651 dbg("%s - shutting down urbs", __FUNCTION__);
652 usb_kill_urb(port->write_urb);
653 usb_kill_urb(port->read_urb);
654 usb_kill_urb(port->interrupt_in_urb);
655
656 if (port->tty) {
657 c_cflag = port->tty->termios->c_cflag;
658 if (c_cflag & HUPCL) {
659 /* drop DTR and RTS */
660 spin_lock_irqsave(&priv->lock, flags);
661 priv->line_control = 0;
662 spin_unlock_irqrestore(&priv->lock, flags);
663 set_control_lines(port->serial->dev, 0);
664 }
665 }
666 }
667
668 static int pl2303_open(struct usb_serial_port *port, struct file *filp)
669 {
670 struct ktermios tmp_termios;
671 struct usb_serial *serial = port->serial;
672 struct pl2303_private *priv = usb_get_serial_port_data(port);
673 unsigned char *buf;
674 int result;
675
676 dbg("%s - port %d", __FUNCTION__, port->number);
677
678 if (priv->type != HX) {
679 usb_clear_halt(serial->dev, port->write_urb->pipe);
680 usb_clear_halt(serial->dev, port->read_urb->pipe);
681 }
682
683 buf = kmalloc(10, GFP_KERNEL);
684 if (buf==NULL)
685 return -ENOMEM;
686
687 #define FISH(a,b,c,d) \
688 result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
689 b, a, c, d, buf, 1, 100); \
690 dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
691
692 #define SOUP(a,b,c,d) \
693 result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
694 b, a, c, d, NULL, 0, 100); \
695 dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
696
697 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
698 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
699 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
700 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
701 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
702 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
703 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
704 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
705 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
706 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
707
708 if (priv->type == HX) {
709 /* HX chip */
710 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
711 /* reset upstream data pipes */
712 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
713 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
714 } else {
715 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
716 }
717
718 kfree(buf);
719
720 /* Setup termios */
721 if (port->tty) {
722 pl2303_set_termios(port, &tmp_termios);
723 }
724
725 //FIXME: need to assert RTS and DTR if CRTSCTS off
726
727 dbg("%s - submitting read urb", __FUNCTION__);
728 port->read_urb->dev = serial->dev;
729 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
730 if (result) {
731 dev_err(&port->dev, "%s - failed submitting read urb,"
732 " error %d\n", __FUNCTION__, result);
733 pl2303_close(port, NULL);
734 return -EPROTO;
735 }
736
737 dbg("%s - submitting interrupt urb", __FUNCTION__);
738 port->interrupt_in_urb->dev = serial->dev;
739 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
740 if (result) {
741 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
742 " error %d\n", __FUNCTION__, result);
743 pl2303_close(port, NULL);
744 return -EPROTO;
745 }
746 return 0;
747 }
748
749 static int pl2303_tiocmset(struct usb_serial_port *port, struct file *file,
750 unsigned int set, unsigned int clear)
751 {
752 struct pl2303_private *priv = usb_get_serial_port_data(port);
753 unsigned long flags;
754 u8 control;
755
756 if (!usb_get_intfdata(port->serial->interface))
757 return -ENODEV;
758
759 spin_lock_irqsave(&priv->lock, flags);
760 if (set & TIOCM_RTS)
761 priv->line_control |= CONTROL_RTS;
762 if (set & TIOCM_DTR)
763 priv->line_control |= CONTROL_DTR;
764 if (clear & TIOCM_RTS)
765 priv->line_control &= ~CONTROL_RTS;
766 if (clear & TIOCM_DTR)
767 priv->line_control &= ~CONTROL_DTR;
768 control = priv->line_control;
769 spin_unlock_irqrestore(&priv->lock, flags);
770
771 return set_control_lines(port->serial->dev, control);
772 }
773
774 static int pl2303_tiocmget(struct usb_serial_port *port, struct file *file)
775 {
776 struct pl2303_private *priv = usb_get_serial_port_data(port);
777 unsigned long flags;
778 unsigned int mcr;
779 unsigned int status;
780 unsigned int result;
781
782 dbg("%s (%d)", __FUNCTION__, port->number);
783
784 if (!usb_get_intfdata(port->serial->interface))
785 return -ENODEV;
786
787 spin_lock_irqsave(&priv->lock, flags);
788 mcr = priv->line_control;
789 status = priv->line_status;
790 spin_unlock_irqrestore(&priv->lock, flags);
791
792 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
793 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
794 | ((status & UART_CTS) ? TIOCM_CTS : 0)
795 | ((status & UART_DSR) ? TIOCM_DSR : 0)
796 | ((status & UART_RING) ? TIOCM_RI : 0)
797 | ((status & UART_DCD) ? TIOCM_CD : 0);
798
799 dbg("%s - result = %x", __FUNCTION__, result);
800
801 return result;
802 }
803
804 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
805 {
806 struct pl2303_private *priv = usb_get_serial_port_data(port);
807 unsigned long flags;
808 unsigned int prevstatus;
809 unsigned int status;
810 unsigned int changed;
811
812 spin_lock_irqsave(&priv->lock, flags);
813 prevstatus = priv->line_status;
814 spin_unlock_irqrestore(&priv->lock, flags);
815
816 while (1) {
817 interruptible_sleep_on(&priv->delta_msr_wait);
818 /* see if a signal did it */
819 if (signal_pending(current))
820 return -ERESTARTSYS;
821
822 spin_lock_irqsave(&priv->lock, flags);
823 status = priv->line_status;
824 spin_unlock_irqrestore(&priv->lock, flags);
825
826 changed=prevstatus^status;
827
828 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
829 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
830 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
831 ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
832 return 0;
833 }
834 prevstatus = status;
835 }
836 /* NOTREACHED */
837 return 0;
838 }
839
840 static int pl2303_ioctl(struct usb_serial_port *port, struct file *file,
841 unsigned int cmd, unsigned long arg)
842 {
843 dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
844
845 switch (cmd) {
846 case TIOCMIWAIT:
847 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
848 return wait_modem_info(port, arg);
849
850 default:
851 dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
852 break;
853 }
854
855 return -ENOIOCTLCMD;
856 }
857
858 static void pl2303_break_ctl(struct usb_serial_port *port, int break_state)
859 {
860 struct usb_serial *serial = port->serial;
861 u16 state;
862 int result;
863
864 dbg("%s - port %d", __FUNCTION__, port->number);
865
866 if (break_state == 0)
867 state = BREAK_OFF;
868 else
869 state = BREAK_ON;
870 dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
871
872 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
873 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
874 0, NULL, 0, 100);
875 if (result)
876 dbg("%s - error sending break = %d", __FUNCTION__, result);
877 }
878
879 static void pl2303_shutdown(struct usb_serial *serial)
880 {
881 int i;
882 struct pl2303_private *priv;
883
884 dbg("%s", __FUNCTION__);
885
886 for (i = 0; i < serial->num_ports; ++i) {
887 priv = usb_get_serial_port_data(serial->port[i]);
888 if (priv) {
889 pl2303_buf_free(priv->buf);
890 kfree(priv);
891 usb_set_serial_port_data(serial->port[i], NULL);
892 }
893 }
894 }
895
896 static void pl2303_update_line_status(struct usb_serial_port *port,
897 unsigned char *data,
898 unsigned int actual_length)
899 {
900
901 struct pl2303_private *priv = usb_get_serial_port_data(port);
902 unsigned long flags;
903 u8 status_idx = UART_STATE;
904 u8 length = UART_STATE + 1;
905 u16 idv, idp;
906
907 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
908 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
909
910
911 if (idv == SIEMENS_VENDOR_ID) {
912 if (idp == SIEMENS_PRODUCT_ID_X65 ||
913 idp == SIEMENS_PRODUCT_ID_SX1 ||
914 idp == SIEMENS_PRODUCT_ID_X75) {
915
916 length = 1;
917 status_idx = 0;
918 }
919 }
920
921 if (actual_length < length)
922 return;
923
924 /* Save off the uart status for others to look at */
925 spin_lock_irqsave(&priv->lock, flags);
926 priv->line_status = data[status_idx];
927 spin_unlock_irqrestore(&priv->lock, flags);
928 wake_up_interruptible(&priv->delta_msr_wait);
929 }
930
931 static void pl2303_read_int_callback(struct urb *urb)
932 {
933 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
934 unsigned char *data = urb->transfer_buffer;
935 unsigned int actual_length = urb->actual_length;
936 int status = urb->status;
937 int retval;
938
939 dbg("%s (%d)", __FUNCTION__, port->number);
940
941 switch (status) {
942 case 0:
943 /* success */
944 break;
945 case -ECONNRESET:
946 case -ENOENT:
947 case -ESHUTDOWN:
948 /* this urb is terminated, clean up */
949 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
950 status);
951 return;
952 default:
953 dbg("%s - nonzero urb status received: %d", __FUNCTION__,
954 status);
955 goto exit;
956 }
957
958 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
959 urb->actual_length, urb->transfer_buffer);
960
961 pl2303_update_line_status(port, data, actual_length);
962
963 exit:
964 retval = usb_submit_urb(urb, GFP_ATOMIC);
965 if (retval)
966 dev_err(&urb->dev->dev,
967 "%s - usb_submit_urb failed with result %d\n",
968 __FUNCTION__, retval);
969 }
970
971 static void pl2303_read_bulk_callback(struct urb *urb)
972 {
973 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
974 struct pl2303_private *priv = usb_get_serial_port_data(port);
975 struct tty_struct *tty;
976 unsigned char *data = urb->transfer_buffer;
977 unsigned long flags;
978 int i;
979 int result;
980 int status = urb->status;
981 u8 line_status;
982 char tty_flag;
983
984 dbg("%s - port %d", __FUNCTION__, port->number);
985
986 if (status) {
987 dbg("%s - urb status = %d", __FUNCTION__, status);
988 if (!port->open_count) {
989 dbg("%s - port is closed, exiting.", __FUNCTION__);
990 return;
991 }
992 if (status == -EPROTO) {
993 /* PL2303 mysteriously fails with -EPROTO reschedule
994 * the read */
995 dbg("%s - caught -EPROTO, resubmitting the urb",
996 __FUNCTION__);
997 urb->dev = port->serial->dev;
998 result = usb_submit_urb(urb, GFP_ATOMIC);
999 if (result)
1000 dev_err(&urb->dev->dev, "%s - failed"
1001 " resubmitting read urb, error %d\n",
1002 __FUNCTION__, result);
1003 return;
1004 }
1005 dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
1006 return;
1007 }
1008
1009 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
1010 urb->actual_length, data);
1011
1012 /* get tty_flag from status */
1013 tty_flag = TTY_NORMAL;
1014
1015 spin_lock_irqsave(&priv->lock, flags);
1016 line_status = priv->line_status;
1017 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
1018 spin_unlock_irqrestore(&priv->lock, flags);
1019 wake_up_interruptible(&priv->delta_msr_wait);
1020
1021 /* break takes precedence over parity, */
1022 /* which takes precedence over framing errors */
1023 if (line_status & UART_BREAK_ERROR )
1024 tty_flag = TTY_BREAK;
1025 else if (line_status & UART_PARITY_ERROR)
1026 tty_flag = TTY_PARITY;
1027 else if (line_status & UART_FRAME_ERROR)
1028 tty_flag = TTY_FRAME;
1029 dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
1030
1031 tty = port->tty;
1032 if (tty && urb->actual_length) {
1033 tty_buffer_request_room(tty, urb->actual_length + 1);
1034 /* overrun is special, not associated with a char */
1035 if (line_status & UART_OVERRUN_ERROR)
1036 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
1037 for (i = 0; i < urb->actual_length; ++i)
1038 tty_insert_flip_char(tty, data[i], tty_flag);
1039 tty_flip_buffer_push(tty);
1040 }
1041
1042 /* Schedule the next read _if_ we are still open */
1043 if (port->open_count) {
1044 urb->dev = port->serial->dev;
1045 result = usb_submit_urb(urb, GFP_ATOMIC);
1046 if (result)
1047 dev_err(&urb->dev->dev, "%s - failed resubmitting"
1048 " read urb, error %d\n", __FUNCTION__, result);
1049 }
1050
1051 return;
1052 }
1053
1054 static void pl2303_write_bulk_callback(struct urb *urb)
1055 {
1056 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
1057 struct pl2303_private *priv = usb_get_serial_port_data(port);
1058 int result;
1059 int status = urb->status;
1060
1061 dbg("%s - port %d", __FUNCTION__, port->number);
1062
1063 switch (status) {
1064 case 0:
1065 /* success */
1066 break;
1067 case -ECONNRESET:
1068 case -ENOENT:
1069 case -ESHUTDOWN:
1070 /* this urb is terminated, clean up */
1071 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
1072 status);
1073 priv->write_urb_in_use = 0;
1074 return;
1075 default:
1076 /* error in the urb, so we have to resubmit it */
1077 dbg("%s - Overflow in write", __FUNCTION__);
1078 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__,
1079 status);
1080 port->write_urb->transfer_buffer_length = 1;
1081 port->write_urb->dev = port->serial->dev;
1082 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1083 if (result)
1084 dev_err(&urb->dev->dev, "%s - failed resubmitting write"
1085 " urb, error %d\n", __FUNCTION__, result);
1086 else
1087 return;
1088 }
1089
1090 priv->write_urb_in_use = 0;
1091
1092 /* send any buffered data */
1093 pl2303_send(port);
1094 }
1095
1096 /* All of the device info needed for the PL2303 SIO serial converter */
1097 static struct usb_serial_driver pl2303_device = {
1098 .driver = {
1099 .owner = THIS_MODULE,
1100 .name = "pl2303",
1101 },
1102 .id_table = id_table,
1103 .usb_driver = &pl2303_driver,
1104 .num_interrupt_in = NUM_DONT_CARE,
1105 .num_bulk_in = 1,
1106 .num_bulk_out = 1,
1107 .num_ports = 1,
1108 .open = pl2303_open,
1109 .close = pl2303_close,
1110 .write = pl2303_write,
1111 .ioctl = pl2303_ioctl,
1112 .break_ctl = pl2303_break_ctl,
1113 .set_termios = pl2303_set_termios,
1114 .tiocmget = pl2303_tiocmget,
1115 .tiocmset = pl2303_tiocmset,
1116 .read_bulk_callback = pl2303_read_bulk_callback,
1117 .read_int_callback = pl2303_read_int_callback,
1118 .write_bulk_callback = pl2303_write_bulk_callback,
1119 .write_room = pl2303_write_room,
1120 .chars_in_buffer = pl2303_chars_in_buffer,
1121 .attach = pl2303_startup,
1122 .shutdown = pl2303_shutdown,
1123 };
1124
1125 static int __init pl2303_init(void)
1126 {
1127 int retval;
1128
1129 retval = usb_serial_register(&pl2303_device);
1130 if (retval)
1131 goto failed_usb_serial_register;
1132 retval = usb_register(&pl2303_driver);
1133 if (retval)
1134 goto failed_usb_register;
1135 info(DRIVER_DESC);
1136 return 0;
1137 failed_usb_register:
1138 usb_serial_deregister(&pl2303_device);
1139 failed_usb_serial_register:
1140 return retval;
1141 }
1142
1143 static void __exit pl2303_exit(void)
1144 {
1145 usb_deregister(&pl2303_driver);
1146 usb_serial_deregister(&pl2303_device);
1147 }
1148
1149 module_init(pl2303_init);
1150 module_exit(pl2303_exit);
1151
1152 MODULE_DESCRIPTION(DRIVER_DESC);
1153 MODULE_LICENSE("GPL");
1154
1155 module_param(debug, bool, S_IRUGO | S_IWUSR);
1156 MODULE_PARM_DESC(debug, "Debug enabled or not");
1157
Linux -mm trees (mirror)