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Update libata drive blacklist to the latest from 2.6.21
[linux/fpc-iii.git] / drivers / usb / serial / pl2303.c
blob5dc2ac9afa90b01a210d1993c05b3dea47323309
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 { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_ID) },
86 { } /* Terminating entry */
87 };
88
89 MODULE_DEVICE_TABLE(usb, id_table);
90
91 static struct usb_driver pl2303_driver = {
92 .name = "pl2303",
93 .probe = usb_serial_probe,
94 .disconnect = usb_serial_disconnect,
95 .id_table = id_table,
96 .no_dynamic_id = 1,
97 };
98
99 #define SET_LINE_REQUEST_TYPE 0x21
100 #define SET_LINE_REQUEST 0x20
101
102 #define SET_CONTROL_REQUEST_TYPE 0x21
103 #define SET_CONTROL_REQUEST 0x22
104 #define CONTROL_DTR 0x01
105 #define CONTROL_RTS 0x02
106
107 #define BREAK_REQUEST_TYPE 0x21
108 #define BREAK_REQUEST 0x23
109 #define BREAK_ON 0xffff
110 #define BREAK_OFF 0x0000
111
112 #define GET_LINE_REQUEST_TYPE 0xa1
113 #define GET_LINE_REQUEST 0x21
114
115 #define VENDOR_WRITE_REQUEST_TYPE 0x40
116 #define VENDOR_WRITE_REQUEST 0x01
117
118 #define VENDOR_READ_REQUEST_TYPE 0xc0
119 #define VENDOR_READ_REQUEST 0x01
120
121 #define UART_STATE 0x08
122 #define UART_STATE_TRANSIENT_MASK 0x74
123 #define UART_DCD 0x01
124 #define UART_DSR 0x02
125 #define UART_BREAK_ERROR 0x04
126 #define UART_RING 0x08
127 #define UART_FRAME_ERROR 0x10
128 #define UART_PARITY_ERROR 0x20
129 #define UART_OVERRUN_ERROR 0x40
130 #define UART_CTS 0x80
131
132
133 enum pl2303_type {
134 type_0, /* don't know the difference between type 0 and */
135 type_1, /* type 1, until someone from prolific tells us... */
136 HX, /* HX version of the pl2303 chip */
137 };
138
139 struct pl2303_private {
140 spinlock_t lock;
141 struct pl2303_buf *buf;
142 int write_urb_in_use;
143 wait_queue_head_t delta_msr_wait;
144 u8 line_control;
145 u8 line_status;
146 u8 termios_initialized;
147 enum pl2303_type type;
148 };
149
150 /*
151 * pl2303_buf_alloc
152 *
153 * Allocate a circular buffer and all associated memory.
154 */
155 static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
156 {
157 struct pl2303_buf *pb;
158
159 if (size == 0)
160 return NULL;
161
162 pb = kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
163 if (pb == NULL)
164 return NULL;
165
166 pb->buf_buf = kmalloc(size, GFP_KERNEL);
167 if (pb->buf_buf == NULL) {
168 kfree(pb);
169 return NULL;
170 }
171
172 pb->buf_size = size;
173 pb->buf_get = pb->buf_put = pb->buf_buf;
174
175 return pb;
176 }
177
178 /*
179 * pl2303_buf_free
180 *
181 * Free the buffer and all associated memory.
182 */
183 static void pl2303_buf_free(struct pl2303_buf *pb)
184 {
185 if (pb) {
186 kfree(pb->buf_buf);
187 kfree(pb);
188 }
189 }
190
191 /*
192 * pl2303_buf_clear
193 *
194 * Clear out all data in the circular buffer.
195 */
196 static void pl2303_buf_clear(struct pl2303_buf *pb)
197 {
198 if (pb != NULL)
199 pb->buf_get = pb->buf_put;
200 /* equivalent to a get of all data available */
201 }
202
203 /*
204 * pl2303_buf_data_avail
205 *
206 * Return the number of bytes of data available in the circular
207 * buffer.
208 */
209 static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
210 {
211 if (pb == NULL)
212 return 0;
213
214 return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
215 }
216
217 /*
218 * pl2303_buf_space_avail
219 *
220 * Return the number of bytes of space available in the circular
221 * buffer.
222 */
223 static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
224 {
225 if (pb == NULL)
226 return 0;
227
228 return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
229 }
230
231 /*
232 * pl2303_buf_put
233 *
234 * Copy data data from a user buffer and put it into the circular buffer.
235 * Restrict to the amount of space available.
236 *
237 * Return the number of bytes copied.
238 */
239 static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
240 unsigned int count)
241 {
242 unsigned int len;
243
244 if (pb == NULL)
245 return 0;
246
247 len = pl2303_buf_space_avail(pb);
248 if (count > len)
249 count = len;
250
251 if (count == 0)
252 return 0;
253
254 len = pb->buf_buf + pb->buf_size - pb->buf_put;
255 if (count > len) {
256 memcpy(pb->buf_put, buf, len);
257 memcpy(pb->buf_buf, buf+len, count - len);
258 pb->buf_put = pb->buf_buf + count - len;
259 } else {
260 memcpy(pb->buf_put, buf, count);
261 if (count < len)
262 pb->buf_put += count;
263 else /* count == len */
264 pb->buf_put = pb->buf_buf;
265 }
266
267 return count;
268 }
269
270 /*
271 * pl2303_buf_get
272 *
273 * Get data from the circular buffer and copy to the given buffer.
274 * Restrict to the amount of data available.
275 *
276 * Return the number of bytes copied.
277 */
278 static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
279 unsigned int count)
280 {
281 unsigned int len;
282
283 if (pb == NULL)
284 return 0;
285
286 len = pl2303_buf_data_avail(pb);
287 if (count > len)
288 count = len;
289
290 if (count == 0)
291 return 0;
292
293 len = pb->buf_buf + pb->buf_size - pb->buf_get;
294 if (count > len) {
295 memcpy(buf, pb->buf_get, len);
296 memcpy(buf+len, pb->buf_buf, count - len);
297 pb->buf_get = pb->buf_buf + count - len;
298 } else {
299 memcpy(buf, pb->buf_get, count);
300 if (count < len)
301 pb->buf_get += count;
302 else /* count == len */
303 pb->buf_get = pb->buf_buf;
304 }
305
306 return count;
307 }
308
309 static int pl2303_startup(struct usb_serial *serial)
310 {
311 struct pl2303_private *priv;
312 enum pl2303_type type = type_0;
313 int i;
314
315 if (serial->dev->descriptor.bDeviceClass == 0x02)
316 type = type_0;
317 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
318 type = HX;
319 else if (serial->dev->descriptor.bDeviceClass == 0x00)
320 type = type_1;
321 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
322 type = type_1;
323 dbg("device type: %d", type);
324
325 for (i = 0; i < serial->num_ports; ++i) {
326 priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
327 if (!priv)
328 goto cleanup;
329 spin_lock_init(&priv->lock);
330 priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
331 if (priv->buf == NULL) {
332 kfree(priv);
333 goto cleanup;
334 }
335 init_waitqueue_head(&priv->delta_msr_wait);
336 priv->type = type;
337 usb_set_serial_port_data(serial->port[i], priv);
338 }
339 return 0;
340
341 cleanup:
342 for (--i; i>=0; --i) {
343 priv = usb_get_serial_port_data(serial->port[i]);
344 pl2303_buf_free(priv->buf);
345 kfree(priv);
346 usb_set_serial_port_data(serial->port[i], NULL);
347 }
348 return -ENOMEM;
349 }
350
351 static int set_control_lines(struct usb_device *dev, u8 value)
352 {
353 int retval;
354
355 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
356 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
357 value, 0, NULL, 0, 100);
358 dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
359 return retval;
360 }
361
362 static void pl2303_send(struct usb_serial_port *port)
363 {
364 int count, result;
365 struct pl2303_private *priv = usb_get_serial_port_data(port);
366 unsigned long flags;
367
368 dbg("%s - port %d", __FUNCTION__, port->number);
369
370 spin_lock_irqsave(&priv->lock, flags);
371
372 if (priv->write_urb_in_use) {
373 spin_unlock_irqrestore(&priv->lock, flags);
374 return;
375 }
376
377 count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
378 port->bulk_out_size);
379
380 if (count == 0) {
381 spin_unlock_irqrestore(&priv->lock, flags);
382 return;
383 }
384
385 priv->write_urb_in_use = 1;
386
387 spin_unlock_irqrestore(&priv->lock, flags);
388
389 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count,
390 port->write_urb->transfer_buffer);
391
392 port->write_urb->transfer_buffer_length = count;
393 port->write_urb->dev = port->serial->dev;
394 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
395 if (result) {
396 dev_err(&port->dev, "%s - failed submitting write urb,"
397 " error %d\n", __FUNCTION__, result);
398 priv->write_urb_in_use = 0;
399 // TODO: reschedule pl2303_send
400 }
401
402 usb_serial_port_softint(port);
403 }
404
405 static int pl2303_write(struct usb_serial_port *port, const unsigned char *buf,
406 int count)
407 {
408 struct pl2303_private *priv = usb_get_serial_port_data(port);
409 unsigned long flags;
410
411 dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
412
413 if (!count)
414 return count;
415
416 spin_lock_irqsave(&priv->lock, flags);
417 count = pl2303_buf_put(priv->buf, buf, count);
418 spin_unlock_irqrestore(&priv->lock, flags);
419
420 pl2303_send(port);
421
422 return count;
423 }
424
425 static int pl2303_write_room(struct usb_serial_port *port)
426 {
427 struct pl2303_private *priv = usb_get_serial_port_data(port);
428 int room = 0;
429 unsigned long flags;
430
431 dbg("%s - port %d", __FUNCTION__, port->number);
432
433 spin_lock_irqsave(&priv->lock, flags);
434 room = pl2303_buf_space_avail(priv->buf);
435 spin_unlock_irqrestore(&priv->lock, flags);
436
437 dbg("%s - returns %d", __FUNCTION__, room);
438 return room;
439 }
440
441 static int pl2303_chars_in_buffer(struct usb_serial_port *port)
442 {
443 struct pl2303_private *priv = usb_get_serial_port_data(port);
444 int chars = 0;
445 unsigned long flags;
446
447 dbg("%s - port %d", __FUNCTION__, port->number);
448
449 spin_lock_irqsave(&priv->lock, flags);
450 chars = pl2303_buf_data_avail(priv->buf);
451 spin_unlock_irqrestore(&priv->lock, flags);
452
453 dbg("%s - returns %d", __FUNCTION__, chars);
454 return chars;
455 }
456
457 static void pl2303_set_termios(struct usb_serial_port *port,
458 struct ktermios *old_termios)
459 {
460 struct usb_serial *serial = port->serial;
461 struct pl2303_private *priv = usb_get_serial_port_data(port);
462 unsigned long flags;
463 unsigned int cflag;
464 unsigned char *buf;
465 int baud;
466 int i;
467 u8 control;
468
469 dbg("%s - port %d", __FUNCTION__, port->number);
470
471 if ((!port->tty) || (!port->tty->termios)) {
472 dbg("%s - no tty structures", __FUNCTION__);
473 return;
474 }
475
476 spin_lock_irqsave(&priv->lock, flags);
477 if (!priv->termios_initialized) {
478 *(port->tty->termios) = tty_std_termios;
479 port->tty->termios->c_cflag = B9600 | CS8 | CREAD |
480 HUPCL | CLOCAL;
481 priv->termios_initialized = 1;
482 }
483 spin_unlock_irqrestore(&priv->lock, flags);
484
485 cflag = port->tty->termios->c_cflag;
486 /* check that they really want us to change something */
487 if (old_termios) {
488 if ((cflag == old_termios->c_cflag) &&
489 (RELEVANT_IFLAG(port->tty->termios->c_iflag) ==
490 RELEVANT_IFLAG(old_termios->c_iflag))) {
491 dbg("%s - nothing to change...", __FUNCTION__);
492 return;
493 }
494 }
495
496 buf = kzalloc(7, GFP_KERNEL);
497 if (!buf) {
498 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
499 return;
500 }
501
502 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
503 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
504 0, 0, buf, 7, 100);
505 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
506 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
507
508 if (cflag & CSIZE) {
509 switch (cflag & CSIZE) {
510 case CS5: buf[6] = 5; break;
511 case CS6: buf[6] = 6; break;
512 case CS7: buf[6] = 7; break;
513 default:
514 case CS8: buf[6] = 8; break;
515 }
516 dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
517 }
518
519 baud = 0;
520 switch (cflag & CBAUD) {
521 case B0: baud = 0; break;
522 case B75: baud = 75; break;
523 case B150: baud = 150; break;
524 case B300: baud = 300; break;
525 case B600: baud = 600; break;
526 case B1200: baud = 1200; break;
527 case B1800: baud = 1800; break;
528 case B2400: baud = 2400; break;
529 case B4800: baud = 4800; break;
530 case B9600: baud = 9600; break;
531 case B19200: baud = 19200; break;
532 case B38400: baud = 38400; break;
533 case B57600: baud = 57600; break;
534 case B115200: baud = 115200; break;
535 case B230400: baud = 230400; break;
536 case B460800: baud = 460800; break;
537 default:
538 dev_err(&port->dev, "pl2303 driver does not support"
539 " the baudrate requested (fix it)\n");
540 break;
541 }
542 dbg("%s - baud = %d", __FUNCTION__, baud);
543 if (baud) {
544 buf[0] = baud & 0xff;
545 buf[1] = (baud >> 8) & 0xff;
546 buf[2] = (baud >> 16) & 0xff;
547 buf[3] = (baud >> 24) & 0xff;
548 }
549
550 /* For reference buf[4]=0 is 1 stop bits */
551 /* For reference buf[4]=1 is 1.5 stop bits */
552 /* For reference buf[4]=2 is 2 stop bits */
553 if (cflag & CSTOPB) {
554 buf[4] = 2;
555 dbg("%s - stop bits = 2", __FUNCTION__);
556 } else {
557 buf[4] = 0;
558 dbg("%s - stop bits = 1", __FUNCTION__);
559 }
560
561 if (cflag & PARENB) {
562 /* For reference buf[5]=0 is none parity */
563 /* For reference buf[5]=1 is odd parity */
564 /* For reference buf[5]=2 is even parity */
565 /* For reference buf[5]=3 is mark parity */
566 /* For reference buf[5]=4 is space parity */
567 if (cflag & PARODD) {
568 buf[5] = 1;
569 dbg("%s - parity = odd", __FUNCTION__);
570 } else {
571 buf[5] = 2;
572 dbg("%s - parity = even", __FUNCTION__);
573 }
574 } else {
575 buf[5] = 0;
576 dbg("%s - parity = none", __FUNCTION__);
577 }
578
579 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
580 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
581 0, 0, buf, 7, 100);
582 dbg("0x21:0x20:0:0 %d", i);
583
584 /* change control lines if we are switching to or from B0 */
585 spin_lock_irqsave(&priv->lock, flags);
586 control = priv->line_control;
587 if ((cflag & CBAUD) == B0)
588 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
589 else
590 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
591 if (control != priv->line_control) {
592 control = priv->line_control;
593 spin_unlock_irqrestore(&priv->lock, flags);
594 set_control_lines(serial->dev, control);
595 } else {
596 spin_unlock_irqrestore(&priv->lock, flags);
597 }
598
599 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
600
601 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
602 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
603 0, 0, buf, 7, 100);
604 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
605 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
606
607 if (cflag & CRTSCTS) {
608 __u16 index;
609 if (priv->type == HX)
610 index = 0x61;
611 else
612 index = 0x41;
613 i = usb_control_msg(serial->dev,
614 usb_sndctrlpipe(serial->dev, 0),
615 VENDOR_WRITE_REQUEST,
616 VENDOR_WRITE_REQUEST_TYPE,
617 0x0, index, NULL, 0, 100);
618 dbg("0x40:0x1:0x0:0x%x %d", index, i);
619 }
620
621 kfree(buf);
622 }
623
624 static void pl2303_close(struct usb_serial_port *port, struct file *filp)
625 {
626 struct pl2303_private *priv = usb_get_serial_port_data(port);
627 unsigned long flags;
628 unsigned int c_cflag;
629 int bps;
630 long timeout;
631 wait_queue_t wait;
632
633 dbg("%s - port %d", __FUNCTION__, port->number);
634
635 /* wait for data to drain from the buffer */
636 spin_lock_irqsave(&priv->lock, flags);
637 timeout = PL2303_CLOSING_WAIT;
638 init_waitqueue_entry(&wait, current);
639 add_wait_queue(&port->tty->write_wait, &wait);
640 for (;;) {
641 set_current_state(TASK_INTERRUPTIBLE);
642 if (pl2303_buf_data_avail(priv->buf) == 0 ||
643 timeout == 0 || signal_pending(current) ||
644 !usb_get_intfdata(port->serial->interface)) /* disconnect */
645 break;
646 spin_unlock_irqrestore(&priv->lock, flags);
647 timeout = schedule_timeout(timeout);
648 spin_lock_irqsave(&priv->lock, flags);
649 }
650 set_current_state(TASK_RUNNING);
651 remove_wait_queue(&port->tty->write_wait, &wait);
652 /* clear out any remaining data in the buffer */
653 pl2303_buf_clear(priv->buf);
654 spin_unlock_irqrestore(&priv->lock, flags);
655
656 /* wait for characters to drain from the device */
657 /* (this is long enough for the entire 256 byte */
658 /* pl2303 hardware buffer to drain with no flow */
659 /* control for data rates of 1200 bps or more, */
660 /* for lower rates we should really know how much */
661 /* data is in the buffer to compute a delay */
662 /* that is not unnecessarily long) */
663 bps = tty_get_baud_rate(port->tty);
664 if (bps > 1200)
665 timeout = max((HZ*2560)/bps,HZ/10);
666 else
667 timeout = 2*HZ;
668 schedule_timeout_interruptible(timeout);
669
670 /* shutdown our urbs */
671 dbg("%s - shutting down urbs", __FUNCTION__);
672 usb_kill_urb(port->write_urb);
673 usb_kill_urb(port->read_urb);
674 usb_kill_urb(port->interrupt_in_urb);
675
676 if (port->tty) {
677 c_cflag = port->tty->termios->c_cflag;
678 if (c_cflag & HUPCL) {
679 /* drop DTR and RTS */
680 spin_lock_irqsave(&priv->lock, flags);
681 priv->line_control = 0;
682 spin_unlock_irqrestore(&priv->lock, flags);
683 set_control_lines(port->serial->dev, 0);
684 }
685 }
686 }
687
688 static int pl2303_open(struct usb_serial_port *port, struct file *filp)
689 {
690 struct ktermios tmp_termios;
691 struct usb_serial *serial = port->serial;
692 struct pl2303_private *priv = usb_get_serial_port_data(port);
693 unsigned char *buf;
694 int result;
695
696 dbg("%s - port %d", __FUNCTION__, port->number);
697
698 if (priv->type != HX) {
699 usb_clear_halt(serial->dev, port->write_urb->pipe);
700 usb_clear_halt(serial->dev, port->read_urb->pipe);
701 }
702
703 buf = kmalloc(10, GFP_KERNEL);
704 if (buf==NULL)
705 return -ENOMEM;
706
707 #define FISH(a,b,c,d) \
708 result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
709 b, a, c, d, buf, 1, 100); \
710 dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
711
712 #define SOUP(a,b,c,d) \
713 result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
714 b, a, c, d, NULL, 0, 100); \
715 dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
716
717 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
718 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
719 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
720 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
721 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
722 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
723 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
724 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
725 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
726 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
727
728 if (priv->type == HX) {
729 /* HX chip */
730 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
731 /* reset upstream data pipes */
732 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
733 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
734 } else {
735 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
736 }
737
738 kfree(buf);
739
740 /* Setup termios */
741 if (port->tty) {
742 pl2303_set_termios(port, &tmp_termios);
743 }
744
745 //FIXME: need to assert RTS and DTR if CRTSCTS off
746
747 dbg("%s - submitting read urb", __FUNCTION__);
748 port->read_urb->dev = serial->dev;
749 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
750 if (result) {
751 dev_err(&port->dev, "%s - failed submitting read urb,"
752 " error %d\n", __FUNCTION__, result);
753 pl2303_close(port, NULL);
754 return -EPROTO;
755 }
756
757 dbg("%s - submitting interrupt urb", __FUNCTION__);
758 port->interrupt_in_urb->dev = serial->dev;
759 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
760 if (result) {
761 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
762 " error %d\n", __FUNCTION__, result);
763 pl2303_close(port, NULL);
764 return -EPROTO;
765 }
766 return 0;
767 }
768
769 static int pl2303_tiocmset(struct usb_serial_port *port, struct file *file,
770 unsigned int set, unsigned int clear)
771 {
772 struct pl2303_private *priv = usb_get_serial_port_data(port);
773 unsigned long flags;
774 u8 control;
775
776 if (!usb_get_intfdata(port->serial->interface))
777 return -ENODEV;
778
779 spin_lock_irqsave(&priv->lock, flags);
780 if (set & TIOCM_RTS)
781 priv->line_control |= CONTROL_RTS;
782 if (set & TIOCM_DTR)
783 priv->line_control |= CONTROL_DTR;
784 if (clear & TIOCM_RTS)
785 priv->line_control &= ~CONTROL_RTS;
786 if (clear & TIOCM_DTR)
787 priv->line_control &= ~CONTROL_DTR;
788 control = priv->line_control;
789 spin_unlock_irqrestore(&priv->lock, flags);
790
791 return set_control_lines(port->serial->dev, control);
792 }
793
794 static int pl2303_tiocmget(struct usb_serial_port *port, struct file *file)
795 {
796 struct pl2303_private *priv = usb_get_serial_port_data(port);
797 unsigned long flags;
798 unsigned int mcr;
799 unsigned int status;
800 unsigned int result;
801
802 dbg("%s (%d)", __FUNCTION__, port->number);
803
804 if (!usb_get_intfdata(port->serial->interface))
805 return -ENODEV;
806
807 spin_lock_irqsave(&priv->lock, flags);
808 mcr = priv->line_control;
809 status = priv->line_status;
810 spin_unlock_irqrestore(&priv->lock, flags);
811
812 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
813 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
814 | ((status & UART_CTS) ? TIOCM_CTS : 0)
815 | ((status & UART_DSR) ? TIOCM_DSR : 0)
816 | ((status & UART_RING) ? TIOCM_RI : 0)
817 | ((status & UART_DCD) ? TIOCM_CD : 0);
818
819 dbg("%s - result = %x", __FUNCTION__, result);
820
821 return result;
822 }
823
824 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
825 {
826 struct pl2303_private *priv = usb_get_serial_port_data(port);
827 unsigned long flags;
828 unsigned int prevstatus;
829 unsigned int status;
830 unsigned int changed;
831
832 spin_lock_irqsave(&priv->lock, flags);
833 prevstatus = priv->line_status;
834 spin_unlock_irqrestore(&priv->lock, flags);
835
836 while (1) {
837 interruptible_sleep_on(&priv->delta_msr_wait);
838 /* see if a signal did it */
839 if (signal_pending(current))
840 return -ERESTARTSYS;
841
842 spin_lock_irqsave(&priv->lock, flags);
843 status = priv->line_status;
844 spin_unlock_irqrestore(&priv->lock, flags);
845
846 changed=prevstatus^status;
847
848 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
849 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
850 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
851 ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
852 return 0;
853 }
854 prevstatus = status;
855 }
856 /* NOTREACHED */
857 return 0;
858 }
859
860 static int pl2303_ioctl(struct usb_serial_port *port, struct file *file,
861 unsigned int cmd, unsigned long arg)
862 {
863 dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
864
865 switch (cmd) {
866 case TIOCMIWAIT:
867 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
868 return wait_modem_info(port, arg);
869
870 default:
871 dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
872 break;
873 }
874
875 return -ENOIOCTLCMD;
876 }
877
878 static void pl2303_break_ctl(struct usb_serial_port *port, int break_state)
879 {
880 struct usb_serial *serial = port->serial;
881 u16 state;
882 int result;
883
884 dbg("%s - port %d", __FUNCTION__, port->number);
885
886 if (break_state == 0)
887 state = BREAK_OFF;
888 else
889 state = BREAK_ON;
890 dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
891
892 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
893 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
894 0, NULL, 0, 100);
895 if (result)
896 dbg("%s - error sending break = %d", __FUNCTION__, result);
897 }
898
899 static void pl2303_shutdown(struct usb_serial *serial)
900 {
901 int i;
902 struct pl2303_private *priv;
903
904 dbg("%s", __FUNCTION__);
905
906 for (i = 0; i < serial->num_ports; ++i) {
907 priv = usb_get_serial_port_data(serial->port[i]);
908 if (priv) {
909 pl2303_buf_free(priv->buf);
910 kfree(priv);
911 usb_set_serial_port_data(serial->port[i], NULL);
912 }
913 }
914 }
915
916 static void pl2303_update_line_status(struct usb_serial_port *port,
917 unsigned char *data,
918 unsigned int actual_length)
919 {
920
921 struct pl2303_private *priv = usb_get_serial_port_data(port);
922 unsigned long flags;
923 u8 status_idx = UART_STATE;
924 u8 length = UART_STATE + 1;
925 u16 idv, idp;
926
927 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
928 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
929
930
931 if (idv == SIEMENS_VENDOR_ID) {
932 if (idp == SIEMENS_PRODUCT_ID_X65 ||
933 idp == SIEMENS_PRODUCT_ID_SX1 ||
934 idp == SIEMENS_PRODUCT_ID_X75) {
935
936 length = 1;
937 status_idx = 0;
938 }
939 }
940
941 if (actual_length < length)
942 return;
943
944 /* Save off the uart status for others to look at */
945 spin_lock_irqsave(&priv->lock, flags);
946 priv->line_status = data[status_idx];
947 spin_unlock_irqrestore(&priv->lock, flags);
948 wake_up_interruptible(&priv->delta_msr_wait);
949 }
950
951 static void pl2303_read_int_callback(struct urb *urb)
952 {
953 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
954 unsigned char *data = urb->transfer_buffer;
955 unsigned int actual_length = urb->actual_length;
956 int status;
957
958 dbg("%s (%d)", __FUNCTION__, port->number);
959
960 switch (urb->status) {
961 case 0:
962 /* success */
963 break;
964 case -ECONNRESET:
965 case -ENOENT:
966 case -ESHUTDOWN:
967 /* this urb is terminated, clean up */
968 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
969 urb->status);
970 return;
971 default:
972 dbg("%s - nonzero urb status received: %d", __FUNCTION__,
973 urb->status);
974 goto exit;
975 }
976
977 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
978 urb->actual_length, urb->transfer_buffer);
979
980 pl2303_update_line_status(port, data, actual_length);
981
982 exit:
983 status = usb_submit_urb(urb, GFP_ATOMIC);
984 if (status)
985 dev_err(&urb->dev->dev,
986 "%s - usb_submit_urb failed with result %d\n",
987 __FUNCTION__, status);
988 }
989
990 static void pl2303_read_bulk_callback(struct urb *urb)
991 {
992 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
993 struct pl2303_private *priv = usb_get_serial_port_data(port);
994 struct tty_struct *tty;
995 unsigned char *data = urb->transfer_buffer;
996 unsigned long flags;
997 int i;
998 int result;
999 u8 status;
1000 char tty_flag;
1001
1002 dbg("%s - port %d", __FUNCTION__, port->number);
1003
1004 if (urb->status) {
1005 dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
1006 if (!port->open_count) {
1007 dbg("%s - port is closed, exiting.", __FUNCTION__);
1008 return;
1009 }
1010 if (urb->status == -EPROTO) {
1011 /* PL2303 mysteriously fails with -EPROTO reschedule
1012 * the read */
1013 dbg("%s - caught -EPROTO, resubmitting the urb",
1014 __FUNCTION__);
1015 urb->status = 0;
1016 urb->dev = port->serial->dev;
1017 result = usb_submit_urb(urb, GFP_ATOMIC);
1018 if (result)
1019 dev_err(&urb->dev->dev, "%s - failed"
1020 " resubmitting read urb, error %d\n",
1021 __FUNCTION__, result);
1022 return;
1023 }
1024 dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
1025 return;
1026 }
1027
1028 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
1029 urb->actual_length, data);
1030
1031 /* get tty_flag from status */
1032 tty_flag = TTY_NORMAL;
1033
1034 spin_lock_irqsave(&priv->lock, flags);
1035 status = priv->line_status;
1036 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
1037 spin_unlock_irqrestore(&priv->lock, flags);
1038 wake_up_interruptible(&priv->delta_msr_wait);
1039
1040 /* break takes precedence over parity, */
1041 /* which takes precedence over framing errors */
1042 if (status & UART_BREAK_ERROR )
1043 tty_flag = TTY_BREAK;
1044 else if (status & UART_PARITY_ERROR)
1045 tty_flag = TTY_PARITY;
1046 else if (status & UART_FRAME_ERROR)
1047 tty_flag = TTY_FRAME;
1048 dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
1049
1050 tty = port->tty;
1051 if (tty && urb->actual_length) {
1052 tty_buffer_request_room(tty, urb->actual_length + 1);
1053 /* overrun is special, not associated with a char */
1054 if (status & UART_OVERRUN_ERROR)
1055 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
1056 for (i = 0; i < urb->actual_length; ++i)
1057 tty_insert_flip_char(tty, data[i], tty_flag);
1058 tty_flip_buffer_push(tty);
1059 }
1060
1061 /* Schedule the next read _if_ we are still open */
1062 if (port->open_count) {
1063 urb->dev = port->serial->dev;
1064 result = usb_submit_urb(urb, GFP_ATOMIC);
1065 if (result)
1066 dev_err(&urb->dev->dev, "%s - failed resubmitting"
1067 " read urb, error %d\n", __FUNCTION__, result);
1068 }
1069
1070 return;
1071 }
1072
1073 static void pl2303_write_bulk_callback(struct urb *urb)
1074 {
1075 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
1076 struct pl2303_private *priv = usb_get_serial_port_data(port);
1077 int result;
1078
1079 dbg("%s - port %d", __FUNCTION__, port->number);
1080
1081 switch (urb->status) {
1082 case 0:
1083 /* success */
1084 break;
1085 case -ECONNRESET:
1086 case -ENOENT:
1087 case -ESHUTDOWN:
1088 /* this urb is terminated, clean up */
1089 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
1090 urb->status);
1091 priv->write_urb_in_use = 0;
1092 return;
1093 default:
1094 /* error in the urb, so we have to resubmit it */
1095 dbg("%s - Overflow in write", __FUNCTION__);
1096 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__,
1097 urb->status);
1098 port->write_urb->transfer_buffer_length = 1;
1099 port->write_urb->dev = port->serial->dev;
1100 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1101 if (result)
1102 dev_err(&urb->dev->dev, "%s - failed resubmitting write"
1103 " urb, error %d\n", __FUNCTION__, result);
1104 else
1105 return;
1106 }
1107
1108 priv->write_urb_in_use = 0;
1109
1110 /* send any buffered data */
1111 pl2303_send(port);
1112 }
1113
1114 /* All of the device info needed for the PL2303 SIO serial converter */
1115 static struct usb_serial_driver pl2303_device = {
1116 .driver = {
1117 .owner = THIS_MODULE,
1118 .name = "pl2303",
1119 },
1120 .id_table = id_table,
1121 .num_interrupt_in = NUM_DONT_CARE,
1122 .num_bulk_in = 1,
1123 .num_bulk_out = 1,
1124 .num_ports = 1,
1125 .open = pl2303_open,
1126 .close = pl2303_close,
1127 .write = pl2303_write,
1128 .ioctl = pl2303_ioctl,
1129 .break_ctl = pl2303_break_ctl,
1130 .set_termios = pl2303_set_termios,
1131 .tiocmget = pl2303_tiocmget,
1132 .tiocmset = pl2303_tiocmset,
1133 .read_bulk_callback = pl2303_read_bulk_callback,
1134 .read_int_callback = pl2303_read_int_callback,
1135 .write_bulk_callback = pl2303_write_bulk_callback,
1136 .write_room = pl2303_write_room,
1137 .chars_in_buffer = pl2303_chars_in_buffer,
1138 .attach = pl2303_startup,
1139 .shutdown = pl2303_shutdown,
1140 };
1141
1142 static int __init pl2303_init(void)
1143 {
1144 int retval;
1145
1146 retval = usb_serial_register(&pl2303_device);
1147 if (retval)
1148 goto failed_usb_serial_register;
1149 retval = usb_register(&pl2303_driver);
1150 if (retval)
1151 goto failed_usb_register;
1152 info(DRIVER_DESC);
1153 return 0;
1154 failed_usb_register:
1155 usb_serial_deregister(&pl2303_device);
1156 failed_usb_serial_register:
1157 return retval;
1158 }
1159
1160 static void __exit pl2303_exit(void)
1161 {
1162 usb_deregister(&pl2303_driver);
1163 usb_serial_deregister(&pl2303_device);
1164 }
1165
1166 module_init(pl2303_init);
1167 module_exit(pl2303_exit);
1168
1169 MODULE_DESCRIPTION(DRIVER_DESC);
1170 MODULE_LICENSE("GPL");
1171
1172 module_param(debug, bool, S_IRUGO | S_IWUSR);
1173 MODULE_PARM_DESC(debug, "Debug enabled or not");
1174
Linux with added FPC-III support