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[PATCH] USB: onetouch doesn't suspend yet
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / serial / pl2303.c
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1da177e4
LT		 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
502b95c1 11 * the Free Software Foundation; either version 2 of the License.
1da177e4
LT		 12 *
13 * See Documentation/usb/usb-serial.txt for more information on using this driver
14 *
1da177e4
LT		 15 */
16
17#include <linux/config.h>
18#include <linux/kernel.h>
19#include <linux/errno.h>
20#include <linux/init.h>
21#include <linux/slab.h>
22#include <linux/tty.h>
23#include <linux/tty_driver.h>
24#include <linux/tty_flip.h>
25#include <linux/serial.h>
26#include <linux/module.h>
27#include <linux/moduleparam.h>
28#include <linux/spinlock.h>
29#include <asm/uaccess.h>
30#include <linux/usb.h>
31#include "usb-serial.h"
32#include "pl2303.h"
33
34/*
35 * Version Information
36 */
1da177e4
LT		 37#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
38
39static int debug;
40
41#define PL2303_CLOSING_WAIT (30*HZ)
42
43#define PL2303_BUF_SIZE 1024
44#define PL2303_TMP_BUF_SIZE 1024
45
46static DECLARE_MUTEX(pl2303_tmp_buf_sem);
47
48struct pl2303_buf {
49 unsigned int buf_size;
50 char *buf_buf;
51 char *buf_get;
52 char *buf_put;
53};
54
55static struct usb_device_id id_table [] = {
56 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
57 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
58 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
59 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
60 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
61 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
62 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
63 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
64 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
65 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
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_X65) },
acbb36f1 75 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
68e110a0 76 { USB_DEVICE( NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID ) },
1da177e4
LT		 77 { } /* Terminating entry */
78};
79
80MODULE_DEVICE_TABLE (usb, id_table);
81
82static struct usb_driver pl2303_driver = {
83 .owner = THIS_MODULE,
84 .name = "pl2303",
85 .probe = usb_serial_probe,
86 .disconnect = usb_serial_disconnect,
87 .id_table = id_table,
88};
89
90#define SET_LINE_REQUEST_TYPE 0x21
91#define SET_LINE_REQUEST 0x20
92
93#define SET_CONTROL_REQUEST_TYPE 0x21
94#define SET_CONTROL_REQUEST 0x22
95#define CONTROL_DTR 0x01
96#define CONTROL_RTS 0x02
97
98#define BREAK_REQUEST_TYPE 0x21
99#define BREAK_REQUEST 0x23
100#define BREAK_ON 0xffff
101#define BREAK_OFF 0x0000
102
103#define GET_LINE_REQUEST_TYPE 0xa1
104#define GET_LINE_REQUEST 0x21
105
106#define VENDOR_WRITE_REQUEST_TYPE 0x40
107#define VENDOR_WRITE_REQUEST 0x01
108
109#define VENDOR_READ_REQUEST_TYPE 0xc0
110#define VENDOR_READ_REQUEST 0x01
111
112#define UART_STATE 0x08
113#define UART_STATE_TRANSIENT_MASK 0x74
114#define UART_DCD 0x01
115#define UART_DSR 0x02
116#define UART_BREAK_ERROR 0x04
117#define UART_RING 0x08
118#define UART_FRAME_ERROR 0x10
119#define UART_PARITY_ERROR 0x20
120#define UART_OVERRUN_ERROR 0x40
121#define UART_CTS 0x80
122
123/* function prototypes for a PL2303 serial converter */
124static int pl2303_open (struct usb_serial_port *port, struct file *filp);
125static void pl2303_close (struct usb_serial_port *port, struct file *filp);
126static void pl2303_set_termios (struct usb_serial_port *port,
127 struct termios *old);
128static int pl2303_ioctl (struct usb_serial_port *port, struct file *file,
129 unsigned int cmd, unsigned long arg);
130static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs);
131static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
132static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
133static int pl2303_write (struct usb_serial_port *port,
134 const unsigned char *buf, int count);
135static void pl2303_send (struct usb_serial_port *port);
136static int pl2303_write_room(struct usb_serial_port *port);
137static int pl2303_chars_in_buffer(struct usb_serial_port *port);
138static void pl2303_break_ctl(struct usb_serial_port *port,int break_state);
139static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file);
140static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
141 unsigned int set, unsigned int clear);
142static int pl2303_startup (struct usb_serial *serial);
143static void pl2303_shutdown (struct usb_serial *serial);
144static struct pl2303_buf *pl2303_buf_alloc(unsigned int size);
145static void pl2303_buf_free(struct pl2303_buf *pb);
146static void pl2303_buf_clear(struct pl2303_buf *pb);
147static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb);
148static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb);
149static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
150 unsigned int count);
151static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
152 unsigned int count);
153
154
155/* All of the device info needed for the PL2303 SIO serial converter */
ea65370d 156static struct usb_serial_driver pl2303_device = {
18fcac35
GKH		 157 .driver = {
158 .owner = THIS_MODULE,
269bda1c 159 .name = "pl2303",
18fcac35 160 },
1da177e4
LT		 161 .id_table = id_table,
162 .num_interrupt_in = NUM_DONT_CARE,
163 .num_bulk_in = 1,
164 .num_bulk_out = 1,
165 .num_ports = 1,
166 .open = pl2303_open,
167 .close = pl2303_close,
168 .write = pl2303_write,
169 .ioctl = pl2303_ioctl,
170 .break_ctl = pl2303_break_ctl,
171 .set_termios = pl2303_set_termios,
172 .tiocmget = pl2303_tiocmget,
173 .tiocmset = pl2303_tiocmset,
174 .read_bulk_callback = pl2303_read_bulk_callback,
175 .read_int_callback = pl2303_read_int_callback,
176 .write_bulk_callback = pl2303_write_bulk_callback,
177 .write_room = pl2303_write_room,
178 .chars_in_buffer = pl2303_chars_in_buffer,
179 .attach = pl2303_startup,
180 .shutdown = pl2303_shutdown,
181};
182
183enum pl2303_type {
184 type_0, /* don't know the difference between type 0 and */
185 type_1, /* type 1, until someone from prolific tells us... */
186 HX, /* HX version of the pl2303 chip */
187};
188
189struct pl2303_private {
190 spinlock_t lock;
191 struct pl2303_buf *buf;
192 int write_urb_in_use;
193 wait_queue_head_t delta_msr_wait;
194 u8 line_control;
195 u8 line_status;
196 u8 termios_initialized;
197 enum pl2303_type type;
198};
199
200
201static int pl2303_startup (struct usb_serial *serial)
202{
203 struct pl2303_private *priv;
204 enum pl2303_type type = type_0;
205 int i;
206
207 if (serial->dev->descriptor.bDeviceClass == 0x02)
208 type = type_0;
209 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
210 type = HX;
211 else if (serial->dev->descriptor.bDeviceClass == 0x00)
212 type = type_1;
213 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
214 type = type_1;
215 dbg("device type: %d", type);
216
217 for (i = 0; i < serial->num_ports; ++i) {
218 priv = kmalloc (sizeof (struct pl2303_private), GFP_KERNEL);
219 if (!priv)
220 goto cleanup;
221 memset (priv, 0x00, sizeof (struct pl2303_private));
222 spin_lock_init(&priv->lock);
223 priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
224 if (priv->buf == NULL) {
225 kfree(priv);
226 goto cleanup;
227 }
228 init_waitqueue_head(&priv->delta_msr_wait);
229 priv->type = type;
230 usb_set_serial_port_data(serial->port[i], priv);
231 }
232 return 0;
233
234cleanup:
235 for (--i; i>=0; --i) {
236 priv = usb_get_serial_port_data(serial->port[i]);
237 pl2303_buf_free(priv->buf);
238 kfree(priv);
239 usb_set_serial_port_data(serial->port[i], NULL);
240 }
241 return -ENOMEM;
242}
243
244static int set_control_lines (struct usb_device *dev, u8 value)
245{
246 int retval;
247
248 retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0),
249 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
250 value, 0, NULL, 0, 100);
251 dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
252 return retval;
253}
254
255static int pl2303_write (struct usb_serial_port *port, const unsigned char *buf, int count)
256{
257 struct pl2303_private *priv = usb_get_serial_port_data(port);
258 unsigned long flags;
259
260 dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
261
262 if (!count)
263 return count;
264
265 spin_lock_irqsave(&priv->lock, flags);
266 count = pl2303_buf_put(priv->buf, buf, count);
267 spin_unlock_irqrestore(&priv->lock, flags);
268
269 pl2303_send(port);
270
271 return count;
272}
273
274static void pl2303_send(struct usb_serial_port *port)
275{
276 int count, result;
277 struct pl2303_private *priv = usb_get_serial_port_data(port);
278 unsigned long flags;
279
280 dbg("%s - port %d", __FUNCTION__, port->number);
281
282 spin_lock_irqsave(&priv->lock, flags);
283
284 if (priv->write_urb_in_use) {
285 spin_unlock_irqrestore(&priv->lock, flags);
286 return;
287 }
288
289 count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
290 port->bulk_out_size);
291
292 if (count == 0) {
293 spin_unlock_irqrestore(&priv->lock, flags);
294 return;
295 }
296
297 priv->write_urb_in_use = 1;
298
299 spin_unlock_irqrestore(&priv->lock, flags);
300
301 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
302
303 port->write_urb->transfer_buffer_length = count;
304 port->write_urb->dev = port->serial->dev;
305 result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
306 if (result) {
307 dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
308 priv->write_urb_in_use = 0;
309 // TODO: reschedule pl2303_send
310 }
311
312 schedule_work(&port->work);
313}
314
315static int pl2303_write_room(struct usb_serial_port *port)
316{
317 struct pl2303_private *priv = usb_get_serial_port_data(port);
318 int room = 0;
319 unsigned long flags;
320
321 dbg("%s - port %d", __FUNCTION__, port->number);
322
323 spin_lock_irqsave(&priv->lock, flags);
324 room = pl2303_buf_space_avail(priv->buf);
325 spin_unlock_irqrestore(&priv->lock, flags);
326
327 dbg("%s - returns %d", __FUNCTION__, room);
328 return room;
329}
330
331static int pl2303_chars_in_buffer(struct usb_serial_port *port)
332{
333 struct pl2303_private *priv = usb_get_serial_port_data(port);
334 int chars = 0;
335 unsigned long flags;
336
337 dbg("%s - port %d", __FUNCTION__, port->number);
338
339 spin_lock_irqsave(&priv->lock, flags);
340 chars = pl2303_buf_data_avail(priv->buf);
341 spin_unlock_irqrestore(&priv->lock, flags);
342
343 dbg("%s - returns %d", __FUNCTION__, chars);
344 return chars;
345}
346
347static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios)
348{
349 struct usb_serial *serial = port->serial;
350 struct pl2303_private *priv = usb_get_serial_port_data(port);
351 unsigned long flags;
352 unsigned int cflag;
353 unsigned char *buf;
354 int baud;
355 int i;
356 u8 control;
357
358 dbg("%s - port %d", __FUNCTION__, port->number);
359
360 if ((!port->tty) || (!port->tty->termios)) {
361 dbg("%s - no tty structures", __FUNCTION__);
362 return;
363 }
364
365 spin_lock_irqsave(&priv->lock, flags);
366 if (!priv->termios_initialized) {
367 *(port->tty->termios) = tty_std_termios;
368 port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
369 priv->termios_initialized = 1;
370 }
371 spin_unlock_irqrestore(&priv->lock, flags);
372
373 cflag = port->tty->termios->c_cflag;
374 /* check that they really want us to change something */
375 if (old_termios) {
376 if ((cflag == old_termios->c_cflag) &&
377 (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
378 dbg("%s - nothing to change...", __FUNCTION__);
379 return;
380 }
381 }
382
383 buf = kmalloc (7, GFP_KERNEL);
384 if (!buf) {
385 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
386 return;
387 }
388 memset (buf, 0x00, 0x07);
389
390 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
391 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
392 0, 0, buf, 7, 100);
393 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
394 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
395
396
397 if (cflag & CSIZE) {
398 switch (cflag & CSIZE) {
399 case CS5: buf[6] = 5; break;
400 case CS6: buf[6] = 6; break;
401 case CS7: buf[6] = 7; break;
402 default:
403 case CS8: buf[6] = 8; break;
404 }
405 dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
406 }
407
408 baud = 0;
409 switch (cflag & CBAUD) {
410 case B0: baud = 0; break;
411 case B75: baud = 75; break;
412 case B150: baud = 150; break;
413 case B300: baud = 300; break;
414 case B600: baud = 600; break;
415 case B1200: baud = 1200; break;
416 case B1800: baud = 1800; break;
417 case B2400: baud = 2400; break;
418 case B4800: baud = 4800; break;
419 case B9600: baud = 9600; break;
420 case B19200: baud = 19200; break;
421 case B38400: baud = 38400; break;
422 case B57600: baud = 57600; break;
423 case B115200: baud = 115200; break;
424 case B230400: baud = 230400; break;
425 case B460800: baud = 460800; break;
426 default:
427 dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n");
428 break;
429 }
430 dbg("%s - baud = %d", __FUNCTION__, baud);
431 if (baud) {
432 buf[0] = baud & 0xff;
433 buf[1] = (baud >> 8) & 0xff;
434 buf[2] = (baud >> 16) & 0xff;
435 buf[3] = (baud >> 24) & 0xff;
436 }
437
438 /* For reference buf[4]=0 is 1 stop bits */
439 /* For reference buf[4]=1 is 1.5 stop bits */
440 /* For reference buf[4]=2 is 2 stop bits */
441 if (cflag & CSTOPB) {
442 buf[4] = 2;
443 dbg("%s - stop bits = 2", __FUNCTION__);
444 } else {
445 buf[4] = 0;
446 dbg("%s - stop bits = 1", __FUNCTION__);
447 }
448
449 if (cflag & PARENB) {
450 /* For reference buf[5]=0 is none parity */
451 /* For reference buf[5]=1 is odd parity */
452 /* For reference buf[5]=2 is even parity */
453 /* For reference buf[5]=3 is mark parity */
454 /* For reference buf[5]=4 is space parity */
455 if (cflag & PARODD) {
456 buf[5] = 1;
457 dbg("%s - parity = odd", __FUNCTION__);
458 } else {
459 buf[5] = 2;
460 dbg("%s - parity = even", __FUNCTION__);
461 }
462 } else {
463 buf[5] = 0;
464 dbg("%s - parity = none", __FUNCTION__);
465 }
466
467 i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
468 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
469 0, 0, buf, 7, 100);
470 dbg ("0x21:0x20:0:0 %d", i);
471
472 /* change control lines if we are switching to or from B0 */
473 spin_lock_irqsave(&priv->lock, flags);
474 control = priv->line_control;
475 if ((cflag & CBAUD) == B0)
476 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
477 else
478 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
479 if (control != priv->line_control) {
480 control = priv->line_control;
481 spin_unlock_irqrestore(&priv->lock, flags);
482 set_control_lines(serial->dev, control);
483 } else {
484 spin_unlock_irqrestore(&priv->lock, flags);
485 }
486
487 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
488
489 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
490 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
491 0, 0, buf, 7, 100);
492 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
493 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
494
495 if (cflag & CRTSCTS) {
496 __u16 index;
497 if (priv->type == HX)
498 index = 0x61;
499 else
500 index = 0x41;
501 i = usb_control_msg(serial->dev,
502 usb_sndctrlpipe(serial->dev, 0),
503 VENDOR_WRITE_REQUEST,
504 VENDOR_WRITE_REQUEST_TYPE,
505 0x0, index, NULL, 0, 100);
506 dbg ("0x40:0x1:0x0:0x%x %d", index, i);
507 }
508
509 kfree (buf);
510}
511
512static int pl2303_open (struct usb_serial_port *port, struct file *filp)
513{
514 struct termios tmp_termios;
515 struct usb_serial *serial = port->serial;
516 struct pl2303_private *priv = usb_get_serial_port_data(port);
517 unsigned char *buf;
518 int result;
519
520 dbg("%s - port %d", __FUNCTION__, port->number);
521
1694899f
D		 522 if (priv->type != HX) {
523 usb_clear_halt(serial->dev, port->write_urb->pipe);
524 usb_clear_halt(serial->dev, port->read_urb->pipe);
525 }
1da177e4
LT		 526
527 buf = kmalloc(10, GFP_KERNEL);
528 if (buf==NULL)
529 return -ENOMEM;
530
531#define FISH(a,b,c,d) \
532 result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
533 b, a, c, d, buf, 1, 100); \
534 dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
535
536#define SOUP(a,b,c,d) \
537 result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
538 b, a, c, d, NULL, 0, 100); \
539 dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
540
541 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
542 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
543 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
544 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
545 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
546 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
547 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
548 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
549 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
550 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
551
552 if (priv->type == HX) {
553 /* HX chip */
554 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
555 /* reset upstream data pipes */
556 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
557 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
558 } else {
559 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
560 }
561
562 kfree(buf);
563
564 /* Setup termios */
565 if (port->tty) {
566 pl2303_set_termios (port, &tmp_termios);
567 }
568
569 //FIXME: need to assert RTS and DTR if CRTSCTS off
570
571 dbg("%s - submitting read urb", __FUNCTION__);
572 port->read_urb->dev = serial->dev;
573 result = usb_submit_urb (port->read_urb, GFP_KERNEL);
574 if (result) {
575 dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
576 pl2303_close (port, NULL);
577 return -EPROTO;
578 }
579
580 dbg("%s - submitting interrupt urb", __FUNCTION__);
581 port->interrupt_in_urb->dev = serial->dev;
582 result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL);
583 if (result) {
584 dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result);
585 pl2303_close (port, NULL);
586 return -EPROTO;
587 }
588 return 0;
589}
590
591
592static void pl2303_close (struct usb_serial_port *port, struct file *filp)
593{
594 struct pl2303_private *priv = usb_get_serial_port_data(port);
595 unsigned long flags;
596 unsigned int c_cflag;
597 int bps;
598 long timeout;
599 wait_queue_t wait; \
600
601 dbg("%s - port %d", __FUNCTION__, port->number);
602
603 /* wait for data to drain from the buffer */
604 spin_lock_irqsave(&priv->lock, flags);
605 timeout = PL2303_CLOSING_WAIT;
606 init_waitqueue_entry(&wait, current);
607 add_wait_queue(&port->tty->write_wait, &wait);
608 for (;;) {
609 set_current_state(TASK_INTERRUPTIBLE);
610 if (pl2303_buf_data_avail(priv->buf) == 0
611 || timeout == 0 || signal_pending(current)
612 || !usb_get_intfdata(port->serial->interface)) /* disconnect */
613 break;
614 spin_unlock_irqrestore(&priv->lock, flags);
615 timeout = schedule_timeout(timeout);
616 spin_lock_irqsave(&priv->lock, flags);
617 }
618 set_current_state(TASK_RUNNING);
619 remove_wait_queue(&port->tty->write_wait, &wait);
620 /* clear out any remaining data in the buffer */
621 pl2303_buf_clear(priv->buf);
622 spin_unlock_irqrestore(&priv->lock, flags);
623
624 /* wait for characters to drain from the device */
625 /* (this is long enough for the entire 256 byte */
626 /* pl2303 hardware buffer to drain with no flow */
627 /* control for data rates of 1200 bps or more, */
628 /* for lower rates we should really know how much */
629 /* data is in the buffer to compute a delay */
630 /* that is not unnecessarily long) */
631 bps = tty_get_baud_rate(port->tty);
632 if (bps > 1200)
633 timeout = max((HZ*2560)/bps,HZ/10);
634 else
635 timeout = 2*HZ;
22c43863 636 schedule_timeout_interruptible(timeout);
1da177e4
LT		 637
638 /* shutdown our urbs */
639 dbg("%s - shutting down urbs", __FUNCTION__);
640 usb_kill_urb(port->write_urb);
641 usb_kill_urb(port->read_urb);
642 usb_kill_urb(port->interrupt_in_urb);
643
644 if (port->tty) {
645 c_cflag = port->tty->termios->c_cflag;
646 if (c_cflag & HUPCL) {
647 /* drop DTR and RTS */
648 spin_lock_irqsave(&priv->lock, flags);
649 priv->line_control = 0;
650 spin_unlock_irqrestore (&priv->lock, flags);
651 set_control_lines (port->serial->dev, 0);
652 }
653 }
654}
655
656static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
657 unsigned int set, unsigned int clear)
658{
659 struct pl2303_private *priv = usb_get_serial_port_data(port);
660 unsigned long flags;
661 u8 control;
662
6fdd8e8e
FL		 663 if (!usb_get_intfdata(port->serial->interface))
664 return -ENODEV;
665
1da177e4
LT		 666 spin_lock_irqsave (&priv->lock, flags);
667 if (set & TIOCM_RTS)
668 priv->line_control |= CONTROL_RTS;
669 if (set & TIOCM_DTR)
670 priv->line_control |= CONTROL_DTR;
671 if (clear & TIOCM_RTS)
672 priv->line_control &= ~CONTROL_RTS;
673 if (clear & TIOCM_DTR)
674 priv->line_control &= ~CONTROL_DTR;
675 control = priv->line_control;
676 spin_unlock_irqrestore (&priv->lock, flags);
677
678 return set_control_lines (port->serial->dev, control);
679}
680
681static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file)
682{
683 struct pl2303_private *priv = usb_get_serial_port_data(port);
684 unsigned long flags;
685 unsigned int mcr;
686 unsigned int status;
687 unsigned int result;
688
689 dbg("%s (%d)", __FUNCTION__, port->number);
690
6fdd8e8e
FL		 691 if (!usb_get_intfdata(port->serial->interface))
692 return -ENODEV;
693
1da177e4
LT		 694 spin_lock_irqsave (&priv->lock, flags);
695 mcr = priv->line_control;
696 status = priv->line_status;
697 spin_unlock_irqrestore (&priv->lock, flags);
698
699 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
700 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
701 | ((status & UART_CTS) ? TIOCM_CTS : 0)
702 | ((status & UART_DSR) ? TIOCM_DSR : 0)
703 | ((status & UART_RING) ? TIOCM_RI : 0)
704 | ((status & UART_DCD) ? TIOCM_CD : 0);
705
706 dbg("%s - result = %x", __FUNCTION__, result);
707
708 return result;
709}
710
711static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
712{
713 struct pl2303_private *priv = usb_get_serial_port_data(port);
714 unsigned long flags;
715 unsigned int prevstatus;
716 unsigned int status;
717 unsigned int changed;
718
719 spin_lock_irqsave (&priv->lock, flags);
720 prevstatus = priv->line_status;
721 spin_unlock_irqrestore (&priv->lock, flags);
722
723 while (1) {
724 interruptible_sleep_on(&priv->delta_msr_wait);
725 /* see if a signal did it */
726 if (signal_pending(current))
727 return -ERESTARTSYS;
728
729 spin_lock_irqsave (&priv->lock, flags);
730 status = priv->line_status;
731 spin_unlock_irqrestore (&priv->lock, flags);
732
733 changed=prevstatus^status;
734
735 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
736 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
737 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
738 ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
739 return 0;
740 }
741 prevstatus = status;
742 }
743 /* NOTREACHED */
744 return 0;
745}
746
747static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
748{
749 dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
750
751 switch (cmd) {
752 case TIOCMIWAIT:
753 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
754 return wait_modem_info(port, arg);
755
756 default:
757 dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
758 break;
759 }
760
761 return -ENOIOCTLCMD;
762}
763
764static void pl2303_break_ctl (struct usb_serial_port *port, int break_state)
765{
766 struct usb_serial *serial = port->serial;
767 u16 state;
768 int result;
769
770 dbg("%s - port %d", __FUNCTION__, port->number);
771
772 if (break_state == 0)
773 state = BREAK_OFF;
774 else
775 state = BREAK_ON;
776 dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
777
778 result = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
779 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
780 0, NULL, 0, 100);
781 if (result)
782 dbg("%s - error sending break = %d", __FUNCTION__, result);
783}
784
785
786static void pl2303_shutdown (struct usb_serial *serial)
787{
788 int i;
789 struct pl2303_private *priv;
790
791 dbg("%s", __FUNCTION__);
792
793 for (i = 0; i < serial->num_ports; ++i) {
794 priv = usb_get_serial_port_data(serial->port[i]);
795 if (priv) {
796 pl2303_buf_free(priv->buf);
797 kfree(priv);
798 usb_set_serial_port_data(serial->port[i], NULL);
799 }
800 }
801}
802
97bb13ec
FL		 803static void pl2303_update_line_status(struct usb_serial_port *port,
804 unsigned char *data,
805 unsigned int actual_length)
806{
807
808 struct pl2303_private *priv = usb_get_serial_port_data(port);
809 unsigned long flags;
810 u8 status_idx = UART_STATE;
811 u8 length = UART_STATE;
812
813 if ((le16_to_cpu(port->serial->dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) &&
814 (le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X65)) {
815 length = 1;
816 status_idx = 0;
817 }
818
819 if (actual_length < length)
820 goto exit;
821
822 /* Save off the uart status for others to look at */
823 spin_lock_irqsave(&priv->lock, flags);
824 priv->line_status = data[status_idx];
825 spin_unlock_irqrestore(&priv->lock, flags);
826
827exit:
828 return;
829}
1da177e4
LT		 830
831static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs)
832{
833 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
1da177e4 834 unsigned char *data = urb->transfer_buffer;
97bb13ec 835 unsigned int actual_length = urb->actual_length;
1da177e4 836 int status;
1da177e4
LT		 837
838 dbg("%s (%d)", __FUNCTION__, port->number);
839
840 switch (urb->status) {
841 case 0:
842 /* success */
843 break;
844 case -ECONNRESET:
845 case -ENOENT:
846 case -ESHUTDOWN:
847 /* this urb is terminated, clean up */
848 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
849 return;
850 default:
851 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
852 goto exit;
853 }
854
1da177e4 855 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
97bb13ec 856 pl2303_update_line_status(port, data, actual_length);
1da177e4 857
1da177e4
LT		 858exit:
859 status = usb_submit_urb (urb, GFP_ATOMIC);
860 if (status)
861 dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
862 __FUNCTION__, status);
863}
864
865
866static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
867{
868 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
869 struct pl2303_private *priv = usb_get_serial_port_data(port);
870 struct tty_struct *tty;
871 unsigned char *data = urb->transfer_buffer;
872 unsigned long flags;
873 int i;
874 int result;
875 u8 status;
876 char tty_flag;
877
878 dbg("%s - port %d", __FUNCTION__, port->number);
879
880 if (urb->status) {
881 dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
882 if (!port->open_count) {
883 dbg("%s - port is closed, exiting.", __FUNCTION__);
884 return;
885 }
886 if (urb->status == -EPROTO) {
887 /* PL2303 mysteriously fails with -EPROTO reschedule the read */
888 dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__);
889 urb->status = 0;
890 urb->dev = port->serial->dev;
891 result = usb_submit_urb(urb, GFP_ATOMIC);
892 if (result)
893 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
894 return;
895 }
896 dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
897 return;
898 }
899
900 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
901
902 /* get tty_flag from status */
903 tty_flag = TTY_NORMAL;
904
905 spin_lock_irqsave(&priv->lock, flags);
906 status = priv->line_status;
907 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
908 spin_unlock_irqrestore(&priv->lock, flags);
909 wake_up_interruptible (&priv->delta_msr_wait);
910
911 /* break takes precedence over parity, */
912 /* which takes precedence over framing errors */
913 if (status & UART_BREAK_ERROR )
914 tty_flag = TTY_BREAK;
915 else if (status & UART_PARITY_ERROR)
916 tty_flag = TTY_PARITY;
917 else if (status & UART_FRAME_ERROR)
918 tty_flag = TTY_FRAME;
919 dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
920
921 tty = port->tty;
922 if (tty && urb->actual_length) {
923 /* overrun is special, not associated with a char */
924 if (status & UART_OVERRUN_ERROR)
925 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
926
927 for (i = 0; i < urb->actual_length; ++i) {
928 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
929 tty_flip_buffer_push(tty);
930 }
931 tty_insert_flip_char (tty, data[i], tty_flag);
932 }
933 tty_flip_buffer_push (tty);
934 }
935
936 /* Schedule the next read _if_ we are still open */
937 if (port->open_count) {
938 urb->dev = port->serial->dev;
939 result = usb_submit_urb(urb, GFP_ATOMIC);
940 if (result)
941 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
942 }
943
944 return;
945}
946
947
948
949static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
950{
951 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
952 struct pl2303_private *priv = usb_get_serial_port_data(port);
953 int result;
954
955 dbg("%s - port %d", __FUNCTION__, port->number);
956
957 switch (urb->status) {
958 case 0:
959 /* success */
960 break;
961 case -ECONNRESET:
962 case -ENOENT:
963 case -ESHUTDOWN:
964 /* this urb is terminated, clean up */
965 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
966 priv->write_urb_in_use = 0;
967 return;
968 default:
969 /* error in the urb, so we have to resubmit it */
970 dbg("%s - Overflow in write", __FUNCTION__);
971 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
972 port->write_urb->transfer_buffer_length = 1;
973 port->write_urb->dev = port->serial->dev;
974 result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
975 if (result)
976 dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result);
977 else
978 return;
979 }
980
981 priv->write_urb_in_use = 0;
982
983 /* send any buffered data */
984 pl2303_send(port);
985}
986
987
988/*
989 * pl2303_buf_alloc
990 *
991 * Allocate a circular buffer and all associated memory.
992 */
993
994static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
995{
996
997 struct pl2303_buf *pb;
998
999
1000 if (size == 0)
1001 return NULL;
1002
1003 pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
1004 if (pb == NULL)
1005 return NULL;
1006
1007 pb->buf_buf = kmalloc(size, GFP_KERNEL);
1008 if (pb->buf_buf == NULL) {
1009 kfree(pb);
1010 return NULL;
1011 }
1012
1013 pb->buf_size = size;
1014 pb->buf_get = pb->buf_put = pb->buf_buf;
1015
1016 return pb;
1017
1018}
1019
1020
1021/*
1022 * pl2303_buf_free
1023 *
1024 * Free the buffer and all associated memory.
1025 */
1026
1027static void pl2303_buf_free(struct pl2303_buf *pb)
1028{
1bc3c9e1
JJ		 1029 if (pb) {
1030 kfree(pb->buf_buf);
1da177e4
LT		 1031 kfree(pb);
1032 }
1033}
1034
1035
1036/*
1037 * pl2303_buf_clear
1038 *
1039 * Clear out all data in the circular buffer.
1040 */
1041
1042static void pl2303_buf_clear(struct pl2303_buf *pb)
1043{
1044 if (pb != NULL)
1045 pb->buf_get = pb->buf_put;
1046 /* equivalent to a get of all data available */
1047}
1048
1049
1050/*
1051 * pl2303_buf_data_avail
1052 *
1053 * Return the number of bytes of data available in the circular
1054 * buffer.
1055 */
1056
1057static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
1058{
1059 if (pb != NULL)
1060 return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
1061 else
1062 return 0;
1063}
1064
1065
1066/*
1067 * pl2303_buf_space_avail
1068 *
1069 * Return the number of bytes of space available in the circular
1070 * buffer.
1071 */
1072
1073static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
1074{
1075 if (pb != NULL)
1076 return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
1077 else
1078 return 0;
1079}
1080
1081
1082/*
1083 * pl2303_buf_put
1084 *
1085 * Copy data data from a user buffer and put it into the circular buffer.
1086 * Restrict to the amount of space available.
1087 *
1088 * Return the number of bytes copied.
1089 */
1090
1091static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
1092 unsigned int count)
1093{
1094
1095 unsigned int len;
1096
1097
1098 if (pb == NULL)
1099 return 0;
1100
1101 len = pl2303_buf_space_avail(pb);
1102 if (count > len)
1103 count = len;
1104
1105 if (count == 0)
1106 return 0;
1107
1108 len = pb->buf_buf + pb->buf_size - pb->buf_put;
1109 if (count > len) {
1110 memcpy(pb->buf_put, buf, len);
1111 memcpy(pb->buf_buf, buf+len, count - len);
1112 pb->buf_put = pb->buf_buf + count - len;
1113 } else {
1114 memcpy(pb->buf_put, buf, count);
1115 if (count < len)
1116 pb->buf_put += count;
1117 else /* count == len */
1118 pb->buf_put = pb->buf_buf;
1119 }
1120
1121 return count;
1122
1123}
1124
1125
1126/*
1127 * pl2303_buf_get
1128 *
1129 * Get data from the circular buffer and copy to the given buffer.
1130 * Restrict to the amount of data available.
1131 *
1132 * Return the number of bytes copied.
1133 */
1134
1135static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
1136 unsigned int count)
1137{
1138
1139 unsigned int len;
1140
1141
1142 if (pb == NULL)
1143 return 0;
1144
1145 len = pl2303_buf_data_avail(pb);
1146 if (count > len)
1147 count = len;
1148
1149 if (count == 0)
1150 return 0;
1151
1152 len = pb->buf_buf + pb->buf_size - pb->buf_get;
1153 if (count > len) {
1154 memcpy(buf, pb->buf_get, len);
1155 memcpy(buf+len, pb->buf_buf, count - len);
1156 pb->buf_get = pb->buf_buf + count - len;
1157 } else {
1158 memcpy(buf, pb->buf_get, count);
1159 if (count < len)
1160 pb->buf_get += count;
1161 else /* count == len */
1162 pb->buf_get = pb->buf_buf;
1163 }
1164
1165 return count;
1166
1167}
1168
1169static int __init pl2303_init (void)
1170{
1171 int retval;
1172 retval = usb_serial_register(&pl2303_device);
1173 if (retval)
1174 goto failed_usb_serial_register;
1175 retval = usb_register(&pl2303_driver);
1176 if (retval)
1177 goto failed_usb_register;
17a882fc 1178 info(DRIVER_DESC);
1da177e4
LT		 1179 return 0;
1180failed_usb_register:
1181 usb_serial_deregister(&pl2303_device);
1182failed_usb_serial_register:
1183 return retval;
1184}
1185
1186
1187static void __exit pl2303_exit (void)
1188{
1189 usb_deregister (&pl2303_driver);
1190 usb_serial_deregister (&pl2303_device);
1191}
1192
1193
1194module_init(pl2303_init);
1195module_exit(pl2303_exit);
1196
1197MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4
LT		 1198MODULE_LICENSE("GPL");
1199
1200module_param(debug, bool, S_IRUGO | S_IWUSR);
1201MODULE_PARM_DESC(debug, "Debug enabled or not");
1202
kernel source for telekom puls (alcatel/mediatek)