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[MIPS] update cobalt_defconfig
[pv_ops_mirror.git] / drivers / usb / serial / pl2303.c
blob83dfae93a45db37278ee130e3b99fb30a2328a23
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 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
87 { } /* Terminating entry */
88 };
89
90 MODULE_DEVICE_TABLE(usb, id_table);
91
92 static struct usb_driver pl2303_driver = {
93 .name = "pl2303",
94 .probe = usb_serial_probe,
95 .disconnect = usb_serial_disconnect,
96 .id_table = id_table,
97 .no_dynamic_id = 1,
98 };
99
100 #define SET_LINE_REQUEST_TYPE 0x21
101 #define SET_LINE_REQUEST 0x20
102
103 #define SET_CONTROL_REQUEST_TYPE 0x21
104 #define SET_CONTROL_REQUEST 0x22
105 #define CONTROL_DTR 0x01
106 #define CONTROL_RTS 0x02
107
108 #define BREAK_REQUEST_TYPE 0x21
109 #define BREAK_REQUEST 0x23
110 #define BREAK_ON 0xffff
111 #define BREAK_OFF 0x0000
112
113 #define GET_LINE_REQUEST_TYPE 0xa1
114 #define GET_LINE_REQUEST 0x21
115
116 #define VENDOR_WRITE_REQUEST_TYPE 0x40
117 #define VENDOR_WRITE_REQUEST 0x01
118
119 #define VENDOR_READ_REQUEST_TYPE 0xc0
120 #define VENDOR_READ_REQUEST 0x01
121
122 #define UART_STATE 0x08
123 #define UART_STATE_TRANSIENT_MASK 0x74
124 #define UART_DCD 0x01
125 #define UART_DSR 0x02
126 #define UART_BREAK_ERROR 0x04
127 #define UART_RING 0x08
128 #define UART_FRAME_ERROR 0x10
129 #define UART_PARITY_ERROR 0x20
130 #define UART_OVERRUN_ERROR 0x40
131 #define UART_CTS 0x80
132
133
134 enum pl2303_type {
135 type_0, /* don't know the difference between type 0 and */
136 type_1, /* type 1, until someone from prolific tells us... */
137 HX, /* HX version of the pl2303 chip */
138 };
139
140 struct pl2303_private {
141 spinlock_t lock;
142 struct pl2303_buf *buf;
143 int write_urb_in_use;
144 wait_queue_head_t delta_msr_wait;
145 u8 line_control;
146 u8 line_status;
147 u8 termios_initialized;
148 enum pl2303_type type;
149 };
150
151 /*
152 * pl2303_buf_alloc
153 *
154 * Allocate a circular buffer and all associated memory.
155 */
156 static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
157 {
158 struct pl2303_buf *pb;
159
160 if (size == 0)
161 return NULL;
162
163 pb = kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
164 if (pb == NULL)
165 return NULL;
166
167 pb->buf_buf = kmalloc(size, GFP_KERNEL);
168 if (pb->buf_buf == NULL) {
169 kfree(pb);
170 return NULL;
171 }
172
173 pb->buf_size = size;
174 pb->buf_get = pb->buf_put = pb->buf_buf;
175
176 return pb;
177 }
178
179 /*
180 * pl2303_buf_free
181 *
182 * Free the buffer and all associated memory.
183 */
184 static void pl2303_buf_free(struct pl2303_buf *pb)
185 {
186 if (pb) {
187 kfree(pb->buf_buf);
188 kfree(pb);
189 }
190 }
191
192 /*
193 * pl2303_buf_clear
194 *
195 * Clear out all data in the circular buffer.
196 */
197 static void pl2303_buf_clear(struct pl2303_buf *pb)
198 {
199 if (pb != NULL)
200 pb->buf_get = pb->buf_put;
201 /* equivalent to a get of all data available */
202 }
203
204 /*
205 * pl2303_buf_data_avail
206 *
207 * Return the number of bytes of data available in the circular
208 * buffer.
209 */
210 static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
211 {
212 if (pb == NULL)
213 return 0;
214
215 return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
216 }
217
218 /*
219 * pl2303_buf_space_avail
220 *
221 * Return the number of bytes of space available in the circular
222 * buffer.
223 */
224 static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
225 {
226 if (pb == NULL)
227 return 0;
228
229 return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
230 }
231
232 /*
233 * pl2303_buf_put
234 *
235 * Copy data data from a user buffer and put it into the circular buffer.
236 * Restrict to the amount of space available.
237 *
238 * Return the number of bytes copied.
239 */
240 static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
241 unsigned int count)
242 {
243 unsigned int len;
244
245 if (pb == NULL)
246 return 0;
247
248 len = pl2303_buf_space_avail(pb);
249 if (count > len)
250 count = len;
251
252 if (count == 0)
253 return 0;
254
255 len = pb->buf_buf + pb->buf_size - pb->buf_put;
256 if (count > len) {
257 memcpy(pb->buf_put, buf, len);
258 memcpy(pb->buf_buf, buf+len, count - len);
259 pb->buf_put = pb->buf_buf + count - len;
260 } else {
261 memcpy(pb->buf_put, buf, count);
262 if (count < len)
263 pb->buf_put += count;
264 else /* count == len */
265 pb->buf_put = pb->buf_buf;
266 }
267
268 return count;
269 }
270
271 /*
272 * pl2303_buf_get
273 *
274 * Get data from the circular buffer and copy to the given buffer.
275 * Restrict to the amount of data available.
276 *
277 * Return the number of bytes copied.
278 */
279 static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
280 unsigned int count)
281 {
282 unsigned int len;
283
284 if (pb == NULL)
285 return 0;
286
287 len = pl2303_buf_data_avail(pb);
288 if (count > len)
289 count = len;
290
291 if (count == 0)
292 return 0;
293
294 len = pb->buf_buf + pb->buf_size - pb->buf_get;
295 if (count > len) {
296 memcpy(buf, pb->buf_get, len);
297 memcpy(buf+len, pb->buf_buf, count - len);
298 pb->buf_get = pb->buf_buf + count - len;
299 } else {
300 memcpy(buf, pb->buf_get, count);
301 if (count < len)
302 pb->buf_get += count;
303 else /* count == len */
304 pb->buf_get = pb->buf_buf;
305 }
306
307 return count;
308 }
309
310 static int pl2303_startup(struct usb_serial *serial)
311 {
312 struct pl2303_private *priv;
313 enum pl2303_type type = type_0;
314 int i;
315
316 if (serial->dev->descriptor.bDeviceClass == 0x02)
317 type = type_0;
318 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
319 type = HX;
320 else if (serial->dev->descriptor.bDeviceClass == 0x00)
321 type = type_1;
322 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
323 type = type_1;
324 dbg("device type: %d", type);
325
326 for (i = 0; i < serial->num_ports; ++i) {
327 priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
328 if (!priv)
329 goto cleanup;
330 spin_lock_init(&priv->lock);
331 priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
332 if (priv->buf == NULL) {
333 kfree(priv);
334 goto cleanup;
335 }
336 init_waitqueue_head(&priv->delta_msr_wait);
337 priv->type = type;
338 usb_set_serial_port_data(serial->port[i], priv);
339 }
340 return 0;
341
342 cleanup:
343 for (--i; i>=0; --i) {
344 priv = usb_get_serial_port_data(serial->port[i]);
345 pl2303_buf_free(priv->buf);
346 kfree(priv);
347 usb_set_serial_port_data(serial->port[i], NULL);
348 }
349 return -ENOMEM;
350 }
351
352 static int set_control_lines(struct usb_device *dev, u8 value)
353 {
354 int retval;
355
356 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
357 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
358 value, 0, NULL, 0, 100);
359 dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
360 return retval;
361 }
362
363 static void pl2303_send(struct usb_serial_port *port)
364 {
365 int count, result;
366 struct pl2303_private *priv = usb_get_serial_port_data(port);
367 unsigned long flags;
368
369 dbg("%s - port %d", __FUNCTION__, port->number);
370
371 spin_lock_irqsave(&priv->lock, flags);
372
373 if (priv->write_urb_in_use) {
374 spin_unlock_irqrestore(&priv->lock, flags);
375 return;
376 }
377
378 count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
379 port->bulk_out_size);
380
381 if (count == 0) {
382 spin_unlock_irqrestore(&priv->lock, flags);
383 return;
384 }
385
386 priv->write_urb_in_use = 1;
387
388 spin_unlock_irqrestore(&priv->lock, flags);
389
390 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count,
391 port->write_urb->transfer_buffer);
392
393 port->write_urb->transfer_buffer_length = count;
394 port->write_urb->dev = port->serial->dev;
395 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
396 if (result) {
397 dev_err(&port->dev, "%s - failed submitting write urb,"
398 " error %d\n", __FUNCTION__, result);
399 priv->write_urb_in_use = 0;
400 // TODO: reschedule pl2303_send
401 }
402
403 usb_serial_port_softint(port);
404 }
405
406 static int pl2303_write(struct usb_serial_port *port, const unsigned char *buf,
407 int count)
408 {
409 struct pl2303_private *priv = usb_get_serial_port_data(port);
410 unsigned long flags;
411
412 dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
413
414 if (!count)
415 return count;
416
417 spin_lock_irqsave(&priv->lock, flags);
418 count = pl2303_buf_put(priv->buf, buf, count);
419 spin_unlock_irqrestore(&priv->lock, flags);
420
421 pl2303_send(port);
422
423 return count;
424 }
425
426 static int pl2303_write_room(struct usb_serial_port *port)
427 {
428 struct pl2303_private *priv = usb_get_serial_port_data(port);
429 int room = 0;
430 unsigned long flags;
431
432 dbg("%s - port %d", __FUNCTION__, port->number);
433
434 spin_lock_irqsave(&priv->lock, flags);
435 room = pl2303_buf_space_avail(priv->buf);
436 spin_unlock_irqrestore(&priv->lock, flags);
437
438 dbg("%s - returns %d", __FUNCTION__, room);
439 return room;
440 }
441
442 static int pl2303_chars_in_buffer(struct usb_serial_port *port)
443 {
444 struct pl2303_private *priv = usb_get_serial_port_data(port);
445 int chars = 0;
446 unsigned long flags;
447
448 dbg("%s - port %d", __FUNCTION__, port->number);
449
450 spin_lock_irqsave(&priv->lock, flags);
451 chars = pl2303_buf_data_avail(priv->buf);
452 spin_unlock_irqrestore(&priv->lock, flags);
453
454 dbg("%s - returns %d", __FUNCTION__, chars);
455 return chars;
456 }
457
458 static void pl2303_set_termios(struct usb_serial_port *port,
459 struct ktermios *old_termios)
460 {
461 struct usb_serial *serial = port->serial;
462 struct pl2303_private *priv = usb_get_serial_port_data(port);
463 unsigned long flags;
464 unsigned int cflag;
465 unsigned char *buf;
466 int baud;
467 int i;
468 u8 control;
469
470 dbg("%s - port %d", __FUNCTION__, port->number);
471
472 if ((!port->tty) || (!port->tty->termios)) {
473 dbg("%s - no tty structures", __FUNCTION__);
474 return;
475 }
476
477 spin_lock_irqsave(&priv->lock, flags);
478 if (!priv->termios_initialized) {
479 *(port->tty->termios) = tty_std_termios;
480 port->tty->termios->c_cflag = B9600 | CS8 | CREAD |
481 HUPCL | CLOCAL;
482 priv->termios_initialized = 1;
483 }
484 spin_unlock_irqrestore(&priv->lock, flags);
485
486 cflag = port->tty->termios->c_cflag;
487 /* check that they really want us to change something */
488 if (old_termios) {
489 if ((cflag == old_termios->c_cflag) &&
490 (RELEVANT_IFLAG(port->tty->termios->c_iflag) ==
491 RELEVANT_IFLAG(old_termios->c_iflag))) {
492 dbg("%s - nothing to change...", __FUNCTION__);
493 return;
494 }
495 }
496
497 buf = kzalloc(7, GFP_KERNEL);
498 if (!buf) {
499 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
500 return;
501 }
502
503 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
504 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
505 0, 0, buf, 7, 100);
506 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
507 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
508
509 if (cflag & CSIZE) {
510 switch (cflag & CSIZE) {
511 case CS5: buf[6] = 5; break;
512 case CS6: buf[6] = 6; break;
513 case CS7: buf[6] = 7; break;
514 default:
515 case CS8: buf[6] = 8; break;
516 }
517 dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
518 }
519
520 baud = 0;
521 switch (cflag & CBAUD) {
522 case B0: baud = 0; break;
523 case B75: baud = 75; break;
524 case B150: baud = 150; break;
525 case B300: baud = 300; break;
526 case B600: baud = 600; break;
527 case B1200: baud = 1200; break;
528 case B1800: baud = 1800; break;
529 case B2400: baud = 2400; break;
530 case B4800: baud = 4800; break;
531 case B9600: baud = 9600; break;
532 case B19200: baud = 19200; break;
533 case B38400: baud = 38400; break;
534 case B57600: baud = 57600; break;
535 case B115200: baud = 115200; break;
536 case B230400: baud = 230400; break;
537 case B460800: baud = 460800; break;
538 default:
539 dev_err(&port->dev, "pl2303 driver does not support"
540 " the baudrate requested (fix it)\n");
541 break;
542 }
543 dbg("%s - baud = %d", __FUNCTION__, baud);
544 if (baud) {
545 buf[0] = baud & 0xff;
546 buf[1] = (baud >> 8) & 0xff;
547 buf[2] = (baud >> 16) & 0xff;
548 buf[3] = (baud >> 24) & 0xff;
549 }
550
551 /* For reference buf[4]=0 is 1 stop bits */
552 /* For reference buf[4]=1 is 1.5 stop bits */
553 /* For reference buf[4]=2 is 2 stop bits */
554 if (cflag & CSTOPB) {
555 buf[4] = 2;
556 dbg("%s - stop bits = 2", __FUNCTION__);
557 } else {
558 buf[4] = 0;
559 dbg("%s - stop bits = 1", __FUNCTION__);
560 }
561
562 if (cflag & PARENB) {
563 /* For reference buf[5]=0 is none parity */
564 /* For reference buf[5]=1 is odd parity */
565 /* For reference buf[5]=2 is even parity */
566 /* For reference buf[5]=3 is mark parity */
567 /* For reference buf[5]=4 is space parity */
568 if (cflag & PARODD) {
569 buf[5] = 1;
570 dbg("%s - parity = odd", __FUNCTION__);
571 } else {
572 buf[5] = 2;
573 dbg("%s - parity = even", __FUNCTION__);
574 }
575 } else {
576 buf[5] = 0;
577 dbg("%s - parity = none", __FUNCTION__);
578 }
579
580 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
581 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
582 0, 0, buf, 7, 100);
583 dbg("0x21:0x20:0:0 %d", i);
584
585 /* change control lines if we are switching to or from B0 */
586 spin_lock_irqsave(&priv->lock, flags);
587 control = priv->line_control;
588 if ((cflag & CBAUD) == B0)
589 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
590 else
591 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
592 if (control != priv->line_control) {
593 control = priv->line_control;
594 spin_unlock_irqrestore(&priv->lock, flags);
595 set_control_lines(serial->dev, control);
596 } else {
597 spin_unlock_irqrestore(&priv->lock, flags);
598 }
599
600 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
601
602 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
603 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
604 0, 0, buf, 7, 100);
605 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
606 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
607
608 if (cflag & CRTSCTS) {
609 __u16 index;
610 if (priv->type == HX)
611 index = 0x61;
612 else
613 index = 0x41;
614 i = usb_control_msg(serial->dev,
615 usb_sndctrlpipe(serial->dev, 0),
616 VENDOR_WRITE_REQUEST,
617 VENDOR_WRITE_REQUEST_TYPE,
618 0x0, index, NULL, 0, 100);
619 dbg("0x40:0x1:0x0:0x%x %d", index, i);
620 }
621
622 kfree(buf);
623 }
624
625 static void pl2303_close(struct usb_serial_port *port, struct file *filp)
626 {
627 struct pl2303_private *priv = usb_get_serial_port_data(port);
628 unsigned long flags;
629 unsigned int c_cflag;
630 int bps;
631 long timeout;
632 wait_queue_t wait;
633
634 dbg("%s - port %d", __FUNCTION__, port->number);
635
636 /* wait for data to drain from the buffer */
637 spin_lock_irqsave(&priv->lock, flags);
638 timeout = PL2303_CLOSING_WAIT;
639 init_waitqueue_entry(&wait, current);
640 add_wait_queue(&port->tty->write_wait, &wait);
641 for (;;) {
642 set_current_state(TASK_INTERRUPTIBLE);
643 if (pl2303_buf_data_avail(priv->buf) == 0 ||
644 timeout == 0 || signal_pending(current) ||
645 !usb_get_intfdata(port->serial->interface)) /* disconnect */
646 break;
647 spin_unlock_irqrestore(&priv->lock, flags);
648 timeout = schedule_timeout(timeout);
649 spin_lock_irqsave(&priv->lock, flags);
650 }
651 set_current_state(TASK_RUNNING);
652 remove_wait_queue(&port->tty->write_wait, &wait);
653 /* clear out any remaining data in the buffer */
654 pl2303_buf_clear(priv->buf);
655 spin_unlock_irqrestore(&priv->lock, flags);
656
657 /* wait for characters to drain from the device */
658 /* (this is long enough for the entire 256 byte */
659 /* pl2303 hardware buffer to drain with no flow */
660 /* control for data rates of 1200 bps or more, */
661 /* for lower rates we should really know how much */
662 /* data is in the buffer to compute a delay */
663 /* that is not unnecessarily long) */
664 bps = tty_get_baud_rate(port->tty);
665 if (bps > 1200)
666 timeout = max((HZ*2560)/bps,HZ/10);
667 else
668 timeout = 2*HZ;
669 schedule_timeout_interruptible(timeout);
670
671 /* shutdown our urbs */
672 dbg("%s - shutting down urbs", __FUNCTION__);
673 usb_kill_urb(port->write_urb);
674 usb_kill_urb(port->read_urb);
675 usb_kill_urb(port->interrupt_in_urb);
676
677 if (port->tty) {
678 c_cflag = port->tty->termios->c_cflag;
679 if (c_cflag & HUPCL) {
680 /* drop DTR and RTS */
681 spin_lock_irqsave(&priv->lock, flags);
682 priv->line_control = 0;
683 spin_unlock_irqrestore(&priv->lock, flags);
684 set_control_lines(port->serial->dev, 0);
685 }
686 }
687 }
688
689 static int pl2303_open(struct usb_serial_port *port, struct file *filp)
690 {
691 struct ktermios tmp_termios;
692 struct usb_serial *serial = port->serial;
693 struct pl2303_private *priv = usb_get_serial_port_data(port);
694 unsigned char *buf;
695 int result;
696
697 dbg("%s - port %d", __FUNCTION__, port->number);
698
699 if (priv->type != HX) {
700 usb_clear_halt(serial->dev, port->write_urb->pipe);
701 usb_clear_halt(serial->dev, port->read_urb->pipe);
702 }
703
704 buf = kmalloc(10, GFP_KERNEL);
705 if (buf==NULL)
706 return -ENOMEM;
707
708 #define FISH(a,b,c,d) \
709 result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
710 b, a, c, d, buf, 1, 100); \
711 dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
712
713 #define SOUP(a,b,c,d) \
714 result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
715 b, a, c, d, NULL, 0, 100); \
716 dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
717
718 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
719 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
720 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
721 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
722 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
723 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
724 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
725 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
726 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
727 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
728
729 if (priv->type == HX) {
730 /* HX chip */
731 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
732 /* reset upstream data pipes */
733 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
734 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
735 } else {
736 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
737 }
738
739 kfree(buf);
740
741 /* Setup termios */
742 if (port->tty) {
743 pl2303_set_termios(port, &tmp_termios);
744 }
745
746 //FIXME: need to assert RTS and DTR if CRTSCTS off
747
748 dbg("%s - submitting read urb", __FUNCTION__);
749 port->read_urb->dev = serial->dev;
750 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
751 if (result) {
752 dev_err(&port->dev, "%s - failed submitting read urb,"
753 " error %d\n", __FUNCTION__, result);
754 pl2303_close(port, NULL);
755 return -EPROTO;
756 }
757
758 dbg("%s - submitting interrupt urb", __FUNCTION__);
759 port->interrupt_in_urb->dev = serial->dev;
760 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
761 if (result) {
762 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
763 " error %d\n", __FUNCTION__, result);
764 pl2303_close(port, NULL);
765 return -EPROTO;
766 }
767 return 0;
768 }
769
770 static int pl2303_tiocmset(struct usb_serial_port *port, struct file *file,
771 unsigned int set, unsigned int clear)
772 {
773 struct pl2303_private *priv = usb_get_serial_port_data(port);
774 unsigned long flags;
775 u8 control;
776
777 if (!usb_get_intfdata(port->serial->interface))
778 return -ENODEV;
779
780 spin_lock_irqsave(&priv->lock, flags);
781 if (set & TIOCM_RTS)
782 priv->line_control |= CONTROL_RTS;
783 if (set & TIOCM_DTR)
784 priv->line_control |= CONTROL_DTR;
785 if (clear & TIOCM_RTS)
786 priv->line_control &= ~CONTROL_RTS;
787 if (clear & TIOCM_DTR)
788 priv->line_control &= ~CONTROL_DTR;
789 control = priv->line_control;
790 spin_unlock_irqrestore(&priv->lock, flags);
791
792 return set_control_lines(port->serial->dev, control);
793 }
794
795 static int pl2303_tiocmget(struct usb_serial_port *port, struct file *file)
796 {
797 struct pl2303_private *priv = usb_get_serial_port_data(port);
798 unsigned long flags;
799 unsigned int mcr;
800 unsigned int status;
801 unsigned int result;
802
803 dbg("%s (%d)", __FUNCTION__, port->number);
804
805 if (!usb_get_intfdata(port->serial->interface))
806 return -ENODEV;
807
808 spin_lock_irqsave(&priv->lock, flags);
809 mcr = priv->line_control;
810 status = priv->line_status;
811 spin_unlock_irqrestore(&priv->lock, flags);
812
813 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
814 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
815 | ((status & UART_CTS) ? TIOCM_CTS : 0)
816 | ((status & UART_DSR) ? TIOCM_DSR : 0)
817 | ((status & UART_RING) ? TIOCM_RI : 0)
818 | ((status & UART_DCD) ? TIOCM_CD : 0);
819
820 dbg("%s - result = %x", __FUNCTION__, result);
821
822 return result;
823 }
824
825 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
826 {
827 struct pl2303_private *priv = usb_get_serial_port_data(port);
828 unsigned long flags;
829 unsigned int prevstatus;
830 unsigned int status;
831 unsigned int changed;
832
833 spin_lock_irqsave(&priv->lock, flags);
834 prevstatus = priv->line_status;
835 spin_unlock_irqrestore(&priv->lock, flags);
836
837 while (1) {
838 interruptible_sleep_on(&priv->delta_msr_wait);
839 /* see if a signal did it */
840 if (signal_pending(current))
841 return -ERESTARTSYS;
842
843 spin_lock_irqsave(&priv->lock, flags);
844 status = priv->line_status;
845 spin_unlock_irqrestore(&priv->lock, flags);
846
847 changed=prevstatus^status;
848
849 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
850 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
851 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
852 ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
853 return 0;
854 }
855 prevstatus = status;
856 }
857 /* NOTREACHED */
858 return 0;
859 }
860
861 static int pl2303_ioctl(struct usb_serial_port *port, struct file *file,
862 unsigned int cmd, unsigned long arg)
863 {
864 dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
865
866 switch (cmd) {
867 case TIOCMIWAIT:
868 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
869 return wait_modem_info(port, arg);
870
871 default:
872 dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
873 break;
874 }
875
876 return -ENOIOCTLCMD;
877 }
878
879 static void pl2303_break_ctl(struct usb_serial_port *port, int break_state)
880 {
881 struct usb_serial *serial = port->serial;
882 u16 state;
883 int result;
884
885 dbg("%s - port %d", __FUNCTION__, port->number);
886
887 if (break_state == 0)
888 state = BREAK_OFF;
889 else
890 state = BREAK_ON;
891 dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
892
893 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
894 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
895 0, NULL, 0, 100);
896 if (result)
897 dbg("%s - error sending break = %d", __FUNCTION__, result);
898 }
899
900 static void pl2303_shutdown(struct usb_serial *serial)
901 {
902 int i;
903 struct pl2303_private *priv;
904
905 dbg("%s", __FUNCTION__);
906
907 for (i = 0; i < serial->num_ports; ++i) {
908 priv = usb_get_serial_port_data(serial->port[i]);
909 if (priv) {
910 pl2303_buf_free(priv->buf);
911 kfree(priv);
912 usb_set_serial_port_data(serial->port[i], NULL);
913 }
914 }
915 }
916
917 static void pl2303_update_line_status(struct usb_serial_port *port,
918 unsigned char *data,
919 unsigned int actual_length)
920 {
921
922 struct pl2303_private *priv = usb_get_serial_port_data(port);
923 unsigned long flags;
924 u8 status_idx = UART_STATE;
925 u8 length = UART_STATE + 1;
926 u16 idv, idp;
927
928 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
929 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
930
931
932 if (idv == SIEMENS_VENDOR_ID) {
933 if (idp == SIEMENS_PRODUCT_ID_X65 ||
934 idp == SIEMENS_PRODUCT_ID_SX1 ||
935 idp == SIEMENS_PRODUCT_ID_X75) {
936
937 length = 1;
938 status_idx = 0;
939 }
940 }
941
942 if (actual_length < length)
943 return;
944
945 /* Save off the uart status for others to look at */
946 spin_lock_irqsave(&priv->lock, flags);
947 priv->line_status = data[status_idx];
948 spin_unlock_irqrestore(&priv->lock, flags);
949 wake_up_interruptible(&priv->delta_msr_wait);
950 }
951
952 static void pl2303_read_int_callback(struct urb *urb)
953 {
954 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
955 unsigned char *data = urb->transfer_buffer;
956 unsigned int actual_length = urb->actual_length;
957 int status;
958
959 dbg("%s (%d)", __FUNCTION__, port->number);
960
961 switch (urb->status) {
962 case 0:
963 /* success */
964 break;
965 case -ECONNRESET:
966 case -ENOENT:
967 case -ESHUTDOWN:
968 /* this urb is terminated, clean up */
969 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
970 urb->status);
971 return;
972 default:
973 dbg("%s - nonzero urb status received: %d", __FUNCTION__,
974 urb->status);
975 goto exit;
976 }
977
978 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
979 urb->actual_length, urb->transfer_buffer);
980
981 pl2303_update_line_status(port, data, actual_length);
982
983 exit:
984 status = usb_submit_urb(urb, GFP_ATOMIC);
985 if (status)
986 dev_err(&urb->dev->dev,
987 "%s - usb_submit_urb failed with result %d\n",
988 __FUNCTION__, status);
989 }
990
991 static void pl2303_read_bulk_callback(struct urb *urb)
992 {
993 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
994 struct pl2303_private *priv = usb_get_serial_port_data(port);
995 struct tty_struct *tty;
996 unsigned char *data = urb->transfer_buffer;
997 unsigned long flags;
998 int i;
999 int result;
1000 u8 status;
1001 char tty_flag;
1002
1003 dbg("%s - port %d", __FUNCTION__, port->number);
1004
1005 if (urb->status) {
1006 dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
1007 if (!port->open_count) {
1008 dbg("%s - port is closed, exiting.", __FUNCTION__);
1009 return;
1010 }
1011 if (urb->status == -EPROTO) {
1012 /* PL2303 mysteriously fails with -EPROTO reschedule
1013 * the read */
1014 dbg("%s - caught -EPROTO, resubmitting the urb",
1015 __FUNCTION__);
1016 urb->status = 0;
1017 urb->dev = port->serial->dev;
1018 result = usb_submit_urb(urb, GFP_ATOMIC);
1019 if (result)
1020 dev_err(&urb->dev->dev, "%s - failed"
1021 " resubmitting read urb, error %d\n",
1022 __FUNCTION__, result);
1023 return;
1024 }
1025 dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
1026 return;
1027 }
1028
1029 usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
1030 urb->actual_length, data);
1031
1032 /* get tty_flag from status */
1033 tty_flag = TTY_NORMAL;
1034
1035 spin_lock_irqsave(&priv->lock, flags);
1036 status = priv->line_status;
1037 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
1038 spin_unlock_irqrestore(&priv->lock, flags);
1039 wake_up_interruptible(&priv->delta_msr_wait);
1040
1041 /* break takes precedence over parity, */
1042 /* which takes precedence over framing errors */
1043 if (status & UART_BREAK_ERROR )
1044 tty_flag = TTY_BREAK;
1045 else if (status & UART_PARITY_ERROR)
1046 tty_flag = TTY_PARITY;
1047 else if (status & UART_FRAME_ERROR)
1048 tty_flag = TTY_FRAME;
1049 dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
1050
1051 tty = port->tty;
1052 if (tty && urb->actual_length) {
1053 tty_buffer_request_room(tty, urb->actual_length + 1);
1054 /* overrun is special, not associated with a char */
1055 if (status & UART_OVERRUN_ERROR)
1056 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
1057 for (i = 0; i < urb->actual_length; ++i)
1058 tty_insert_flip_char(tty, data[i], tty_flag);
1059 tty_flip_buffer_push(tty);
1060 }
1061
1062 /* Schedule the next read _if_ we are still open */
1063 if (port->open_count) {
1064 urb->dev = port->serial->dev;
1065 result = usb_submit_urb(urb, GFP_ATOMIC);
1066 if (result)
1067 dev_err(&urb->dev->dev, "%s - failed resubmitting"
1068 " read urb, error %d\n", __FUNCTION__, result);
1069 }
1070
1071 return;
1072 }
1073
1074 static void pl2303_write_bulk_callback(struct urb *urb)
1075 {
1076 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
1077 struct pl2303_private *priv = usb_get_serial_port_data(port);
1078 int result;
1079
1080 dbg("%s - port %d", __FUNCTION__, port->number);
1081
1082 switch (urb->status) {
1083 case 0:
1084 /* success */
1085 break;
1086 case -ECONNRESET:
1087 case -ENOENT:
1088 case -ESHUTDOWN:
1089 /* this urb is terminated, clean up */
1090 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
1091 urb->status);
1092 priv->write_urb_in_use = 0;
1093 return;
1094 default:
1095 /* error in the urb, so we have to resubmit it */
1096 dbg("%s - Overflow in write", __FUNCTION__);
1097 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__,
1098 urb->status);
1099 port->write_urb->transfer_buffer_length = 1;
1100 port->write_urb->dev = port->serial->dev;
1101 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1102 if (result)
1103 dev_err(&urb->dev->dev, "%s - failed resubmitting write"
1104 " urb, error %d\n", __FUNCTION__, result);
1105 else
1106 return;
1107 }
1108
1109 priv->write_urb_in_use = 0;
1110
1111 /* send any buffered data */
1112 pl2303_send(port);
1113 }
1114
1115 /* All of the device info needed for the PL2303 SIO serial converter */
1116 static struct usb_serial_driver pl2303_device = {
1117 .driver = {
1118 .owner = THIS_MODULE,
1119 .name = "pl2303",
1120 },
1121 .id_table = id_table,
1122 .usb_driver = &pl2303_driver,
1123 .num_interrupt_in = NUM_DONT_CARE,
1124 .num_bulk_in = 1,
1125 .num_bulk_out = 1,
1126 .num_ports = 1,
1127 .open = pl2303_open,
1128 .close = pl2303_close,
1129 .write = pl2303_write,
1130 .ioctl = pl2303_ioctl,
1131 .break_ctl = pl2303_break_ctl,
1132 .set_termios = pl2303_set_termios,
1133 .tiocmget = pl2303_tiocmget,
1134 .tiocmset = pl2303_tiocmset,
1135 .read_bulk_callback = pl2303_read_bulk_callback,
1136 .read_int_callback = pl2303_read_int_callback,
1137 .write_bulk_callback = pl2303_write_bulk_callback,
1138 .write_room = pl2303_write_room,
1139 .chars_in_buffer = pl2303_chars_in_buffer,
1140 .attach = pl2303_startup,
1141 .shutdown = pl2303_shutdown,
1142 };
1143
1144 static int __init pl2303_init(void)
1145 {
1146 int retval;
1147
1148 retval = usb_serial_register(&pl2303_device);
1149 if (retval)
1150 goto failed_usb_serial_register;
1151 retval = usb_register(&pl2303_driver);
1152 if (retval)
1153 goto failed_usb_register;
1154 info(DRIVER_DESC);
1155 return 0;
1156 failed_usb_register:
1157 usb_serial_deregister(&pl2303_device);
1158 failed_usb_serial_register:
1159 return retval;
1160 }
1161
1162 static void __exit pl2303_exit(void)
1163 {
1164 usb_deregister(&pl2303_driver);
1165 usb_serial_deregister(&pl2303_device);
1166 }
1167
1168 module_init(pl2303_init);
1169 module_exit(pl2303_exit);
1170
1171 MODULE_DESCRIPTION(DRIVER_DESC);
1172 MODULE_LICENSE("GPL");
1173
1174 module_param(debug, bool, S_IRUGO | S_IWUSR);
1175 MODULE_PARM_DESC(debug, "Debug enabled or not");
1176
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