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[PATCH] USB Serial: move old changelog comments out of source code
[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 */
37#define DRIVER_VERSION "v0.12"
38#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
39
40static int debug;
41
42#define PL2303_CLOSING_WAIT (30*HZ)
43
44#define PL2303_BUF_SIZE 1024
45#define PL2303_TMP_BUF_SIZE 1024
46
47static DECLARE_MUTEX(pl2303_tmp_buf_sem);
48
49struct pl2303_buf {
50 unsigned int buf_size;
51 char *buf_buf;
52 char *buf_get;
53 char *buf_put;
54};
55
56static struct usb_device_id id_table [] = {
57 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
58 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
59 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
60 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
61 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
62 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
63 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
64 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
65 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
66 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
67 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
68 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
69 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
70 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
71 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
72 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
73 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
74 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
75 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
acbb36f1 76 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
68e110a0 77 { USB_DEVICE( NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID ) },
1da177e4
LT		 78 { } /* Terminating entry */
79};
80
81MODULE_DEVICE_TABLE (usb, id_table);
82
83static struct usb_driver pl2303_driver = {
84 .owner = THIS_MODULE,
85 .name = "pl2303",
86 .probe = usb_serial_probe,
87 .disconnect = usb_serial_disconnect,
88 .id_table = id_table,
89};
90
91#define SET_LINE_REQUEST_TYPE 0x21
92#define SET_LINE_REQUEST 0x20
93
94#define SET_CONTROL_REQUEST_TYPE 0x21
95#define SET_CONTROL_REQUEST 0x22
96#define CONTROL_DTR 0x01
97#define CONTROL_RTS 0x02
98
99#define BREAK_REQUEST_TYPE 0x21
100#define BREAK_REQUEST 0x23
101#define BREAK_ON 0xffff
102#define BREAK_OFF 0x0000
103
104#define GET_LINE_REQUEST_TYPE 0xa1
105#define GET_LINE_REQUEST 0x21
106
107#define VENDOR_WRITE_REQUEST_TYPE 0x40
108#define VENDOR_WRITE_REQUEST 0x01
109
110#define VENDOR_READ_REQUEST_TYPE 0xc0
111#define VENDOR_READ_REQUEST 0x01
112
113#define UART_STATE 0x08
114#define UART_STATE_TRANSIENT_MASK 0x74
115#define UART_DCD 0x01
116#define UART_DSR 0x02
117#define UART_BREAK_ERROR 0x04
118#define UART_RING 0x08
119#define UART_FRAME_ERROR 0x10
120#define UART_PARITY_ERROR 0x20
121#define UART_OVERRUN_ERROR 0x40
122#define UART_CTS 0x80
123
124/* function prototypes for a PL2303 serial converter */
125static int pl2303_open (struct usb_serial_port *port, struct file *filp);
126static void pl2303_close (struct usb_serial_port *port, struct file *filp);
127static void pl2303_set_termios (struct usb_serial_port *port,
128 struct termios *old);
129static int pl2303_ioctl (struct usb_serial_port *port, struct file *file,
130 unsigned int cmd, unsigned long arg);
131static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs);
132static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
133static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
134static int pl2303_write (struct usb_serial_port *port,
135 const unsigned char *buf, int count);
136static void pl2303_send (struct usb_serial_port *port);
137static int pl2303_write_room(struct usb_serial_port *port);
138static int pl2303_chars_in_buffer(struct usb_serial_port *port);
139static void pl2303_break_ctl(struct usb_serial_port *port,int break_state);
140static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file);
141static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
142 unsigned int set, unsigned int clear);
143static int pl2303_startup (struct usb_serial *serial);
144static void pl2303_shutdown (struct usb_serial *serial);
145static struct pl2303_buf *pl2303_buf_alloc(unsigned int size);
146static void pl2303_buf_free(struct pl2303_buf *pb);
147static void pl2303_buf_clear(struct pl2303_buf *pb);
148static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb);
149static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb);
150static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
151 unsigned int count);
152static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
153 unsigned int count);
154
155
156/* All of the device info needed for the PL2303 SIO serial converter */
ea65370d 157static struct usb_serial_driver pl2303_device = {
18fcac35
GKH		 158 .driver = {
159 .owner = THIS_MODULE,
160 },
1da177e4
LT		 161 .name = "PL-2303",
162 .id_table = id_table,
163 .num_interrupt_in = NUM_DONT_CARE,
164 .num_bulk_in = 1,
165 .num_bulk_out = 1,
166 .num_ports = 1,
167 .open = pl2303_open,
168 .close = pl2303_close,
169 .write = pl2303_write,
170 .ioctl = pl2303_ioctl,
171 .break_ctl = pl2303_break_ctl,
172 .set_termios = pl2303_set_termios,
173 .tiocmget = pl2303_tiocmget,
174 .tiocmset = pl2303_tiocmset,
175 .read_bulk_callback = pl2303_read_bulk_callback,
176 .read_int_callback = pl2303_read_int_callback,
177 .write_bulk_callback = pl2303_write_bulk_callback,
178 .write_room = pl2303_write_room,
179 .chars_in_buffer = pl2303_chars_in_buffer,
180 .attach = pl2303_startup,
181 .shutdown = pl2303_shutdown,
182};
183
184enum pl2303_type {
185 type_0, /* don't know the difference between type 0 and */
186 type_1, /* type 1, until someone from prolific tells us... */
187 HX, /* HX version of the pl2303 chip */
188};
189
190struct pl2303_private {
191 spinlock_t lock;
192 struct pl2303_buf *buf;
193 int write_urb_in_use;
194 wait_queue_head_t delta_msr_wait;
195 u8 line_control;
196 u8 line_status;
197 u8 termios_initialized;
198 enum pl2303_type type;
199};
200
201
202static int pl2303_startup (struct usb_serial *serial)
203{
204 struct pl2303_private *priv;
205 enum pl2303_type type = type_0;
206 int i;
207
208 if (serial->dev->descriptor.bDeviceClass == 0x02)
209 type = type_0;
210 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
211 type = HX;
212 else if (serial->dev->descriptor.bDeviceClass == 0x00)
213 type = type_1;
214 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
215 type = type_1;
216 dbg("device type: %d", type);
217
218 for (i = 0; i < serial->num_ports; ++i) {
219 priv = kmalloc (sizeof (struct pl2303_private), GFP_KERNEL);
220 if (!priv)
221 goto cleanup;
222 memset (priv, 0x00, sizeof (struct pl2303_private));
223 spin_lock_init(&priv->lock);
224 priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
225 if (priv->buf == NULL) {
226 kfree(priv);
227 goto cleanup;
228 }
229 init_waitqueue_head(&priv->delta_msr_wait);
230 priv->type = type;
231 usb_set_serial_port_data(serial->port[i], priv);
232 }
233 return 0;
234
235cleanup:
236 for (--i; i>=0; --i) {
237 priv = usb_get_serial_port_data(serial->port[i]);
238 pl2303_buf_free(priv->buf);
239 kfree(priv);
240 usb_set_serial_port_data(serial->port[i], NULL);
241 }
242 return -ENOMEM;
243}
244
245static int set_control_lines (struct usb_device *dev, u8 value)
246{
247 int retval;
248
249 retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0),
250 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
251 value, 0, NULL, 0, 100);
252 dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
253 return retval;
254}
255
256static int pl2303_write (struct usb_serial_port *port, const unsigned char *buf, int count)
257{
258 struct pl2303_private *priv = usb_get_serial_port_data(port);
259 unsigned long flags;
260
261 dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
262
263 if (!count)
264 return count;
265
266 spin_lock_irqsave(&priv->lock, flags);
267 count = pl2303_buf_put(priv->buf, buf, count);
268 spin_unlock_irqrestore(&priv->lock, flags);
269
270 pl2303_send(port);
271
272 return count;
273}
274
275static void pl2303_send(struct usb_serial_port *port)
276{
277 int count, result;
278 struct pl2303_private *priv = usb_get_serial_port_data(port);
279 unsigned long flags;
280
281 dbg("%s - port %d", __FUNCTION__, port->number);
282
283 spin_lock_irqsave(&priv->lock, flags);
284
285 if (priv->write_urb_in_use) {
286 spin_unlock_irqrestore(&priv->lock, flags);
287 return;
288 }
289
290 count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
291 port->bulk_out_size);
292
293 if (count == 0) {
294 spin_unlock_irqrestore(&priv->lock, flags);
295 return;
296 }
297
298 priv->write_urb_in_use = 1;
299
300 spin_unlock_irqrestore(&priv->lock, flags);
301
302 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
303
304 port->write_urb->transfer_buffer_length = count;
305 port->write_urb->dev = port->serial->dev;
306 result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
307 if (result) {
308 dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
309 priv->write_urb_in_use = 0;
310 // TODO: reschedule pl2303_send
311 }
312
313 schedule_work(&port->work);
314}
315
316static int pl2303_write_room(struct usb_serial_port *port)
317{
318 struct pl2303_private *priv = usb_get_serial_port_data(port);
319 int room = 0;
320 unsigned long flags;
321
322 dbg("%s - port %d", __FUNCTION__, port->number);
323
324 spin_lock_irqsave(&priv->lock, flags);
325 room = pl2303_buf_space_avail(priv->buf);
326 spin_unlock_irqrestore(&priv->lock, flags);
327
328 dbg("%s - returns %d", __FUNCTION__, room);
329 return room;
330}
331
332static int pl2303_chars_in_buffer(struct usb_serial_port *port)
333{
334 struct pl2303_private *priv = usb_get_serial_port_data(port);
335 int chars = 0;
336 unsigned long flags;
337
338 dbg("%s - port %d", __FUNCTION__, port->number);
339
340 spin_lock_irqsave(&priv->lock, flags);
341 chars = pl2303_buf_data_avail(priv->buf);
342 spin_unlock_irqrestore(&priv->lock, flags);
343
344 dbg("%s - returns %d", __FUNCTION__, chars);
345 return chars;
346}
347
348static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios)
349{
350 struct usb_serial *serial = port->serial;
351 struct pl2303_private *priv = usb_get_serial_port_data(port);
352 unsigned long flags;
353 unsigned int cflag;
354 unsigned char *buf;
355 int baud;
356 int i;
357 u8 control;
358
359 dbg("%s - port %d", __FUNCTION__, port->number);
360
361 if ((!port->tty) || (!port->tty->termios)) {
362 dbg("%s - no tty structures", __FUNCTION__);
363 return;
364 }
365
366 spin_lock_irqsave(&priv->lock, flags);
367 if (!priv->termios_initialized) {
368 *(port->tty->termios) = tty_std_termios;
369 port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
370 priv->termios_initialized = 1;
371 }
372 spin_unlock_irqrestore(&priv->lock, flags);
373
374 cflag = port->tty->termios->c_cflag;
375 /* check that they really want us to change something */
376 if (old_termios) {
377 if ((cflag == old_termios->c_cflag) &&
378 (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
379 dbg("%s - nothing to change...", __FUNCTION__);
380 return;
381 }
382 }
383
384 buf = kmalloc (7, GFP_KERNEL);
385 if (!buf) {
386 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
387 return;
388 }
389 memset (buf, 0x00, 0x07);
390
391 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
392 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
393 0, 0, buf, 7, 100);
394 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
395 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
396
397
398 if (cflag & CSIZE) {
399 switch (cflag & CSIZE) {
400 case CS5: buf[6] = 5; break;
401 case CS6: buf[6] = 6; break;
402 case CS7: buf[6] = 7; break;
403 default:
404 case CS8: buf[6] = 8; break;
405 }
406 dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
407 }
408
409 baud = 0;
410 switch (cflag & CBAUD) {
411 case B0: baud = 0; break;
412 case B75: baud = 75; break;
413 case B150: baud = 150; break;
414 case B300: baud = 300; break;
415 case B600: baud = 600; break;
416 case B1200: baud = 1200; break;
417 case B1800: baud = 1800; break;
418 case B2400: baud = 2400; break;
419 case B4800: baud = 4800; break;
420 case B9600: baud = 9600; break;
421 case B19200: baud = 19200; break;
422 case B38400: baud = 38400; break;
423 case B57600: baud = 57600; break;
424 case B115200: baud = 115200; break;
425 case B230400: baud = 230400; break;
426 case B460800: baud = 460800; break;
427 default:
428 dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n");
429 break;
430 }
431 dbg("%s - baud = %d", __FUNCTION__, baud);
432 if (baud) {
433 buf[0] = baud & 0xff;
434 buf[1] = (baud >> 8) & 0xff;
435 buf[2] = (baud >> 16) & 0xff;
436 buf[3] = (baud >> 24) & 0xff;
437 }
438
439 /* For reference buf[4]=0 is 1 stop bits */
440 /* For reference buf[4]=1 is 1.5 stop bits */
441 /* For reference buf[4]=2 is 2 stop bits */
442 if (cflag & CSTOPB) {
443 buf[4] = 2;
444 dbg("%s - stop bits = 2", __FUNCTION__);
445 } else {
446 buf[4] = 0;
447 dbg("%s - stop bits = 1", __FUNCTION__);
448 }
449
450 if (cflag & PARENB) {
451 /* For reference buf[5]=0 is none parity */
452 /* For reference buf[5]=1 is odd parity */
453 /* For reference buf[5]=2 is even parity */
454 /* For reference buf[5]=3 is mark parity */
455 /* For reference buf[5]=4 is space parity */
456 if (cflag & PARODD) {
457 buf[5] = 1;
458 dbg("%s - parity = odd", __FUNCTION__);
459 } else {
460 buf[5] = 2;
461 dbg("%s - parity = even", __FUNCTION__);
462 }
463 } else {
464 buf[5] = 0;
465 dbg("%s - parity = none", __FUNCTION__);
466 }
467
468 i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
469 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
470 0, 0, buf, 7, 100);
471 dbg ("0x21:0x20:0:0 %d", i);
472
473 /* change control lines if we are switching to or from B0 */
474 spin_lock_irqsave(&priv->lock, flags);
475 control = priv->line_control;
476 if ((cflag & CBAUD) == B0)
477 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
478 else
479 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
480 if (control != priv->line_control) {
481 control = priv->line_control;
482 spin_unlock_irqrestore(&priv->lock, flags);
483 set_control_lines(serial->dev, control);
484 } else {
485 spin_unlock_irqrestore(&priv->lock, flags);
486 }
487
488 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
489
490 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
491 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
492 0, 0, buf, 7, 100);
493 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
494 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
495
496 if (cflag & CRTSCTS) {
497 __u16 index;
498 if (priv->type == HX)
499 index = 0x61;
500 else
501 index = 0x41;
502 i = usb_control_msg(serial->dev,
503 usb_sndctrlpipe(serial->dev, 0),
504 VENDOR_WRITE_REQUEST,
505 VENDOR_WRITE_REQUEST_TYPE,
506 0x0, index, NULL, 0, 100);
507 dbg ("0x40:0x1:0x0:0x%x %d", index, i);
508 }
509
510 kfree (buf);
511}
512
513static int pl2303_open (struct usb_serial_port *port, struct file *filp)
514{
515 struct termios tmp_termios;
516 struct usb_serial *serial = port->serial;
517 struct pl2303_private *priv = usb_get_serial_port_data(port);
518 unsigned char *buf;
519 int result;
520
521 dbg("%s - port %d", __FUNCTION__, port->number);
522
1694899f
D		 523 if (priv->type != HX) {
524 usb_clear_halt(serial->dev, port->write_urb->pipe);
525 usb_clear_halt(serial->dev, port->read_urb->pipe);
526 }
1da177e4
LT		 527
528 buf = kmalloc(10, GFP_KERNEL);
529 if (buf==NULL)
530 return -ENOMEM;
531
532#define FISH(a,b,c,d) \
533 result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
534 b, a, c, d, buf, 1, 100); \
535 dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
536
537#define SOUP(a,b,c,d) \
538 result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
539 b, a, c, d, NULL, 0, 100); \
540 dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
541
542 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
543 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
544 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
545 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
546 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
547 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
548 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
549 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
550 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
551 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
552
553 if (priv->type == HX) {
554 /* HX chip */
555 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
556 /* reset upstream data pipes */
557 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
558 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
559 } else {
560 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
561 }
562
563 kfree(buf);
564
565 /* Setup termios */
566 if (port->tty) {
567 pl2303_set_termios (port, &tmp_termios);
568 }
569
570 //FIXME: need to assert RTS and DTR if CRTSCTS off
571
572 dbg("%s - submitting read urb", __FUNCTION__);
573 port->read_urb->dev = serial->dev;
574 result = usb_submit_urb (port->read_urb, GFP_KERNEL);
575 if (result) {
576 dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
577 pl2303_close (port, NULL);
578 return -EPROTO;
579 }
580
581 dbg("%s - submitting interrupt urb", __FUNCTION__);
582 port->interrupt_in_urb->dev = serial->dev;
583 result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL);
584 if (result) {
585 dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result);
586 pl2303_close (port, NULL);
587 return -EPROTO;
588 }
589 return 0;
590}
591
592
593static void pl2303_close (struct usb_serial_port *port, struct file *filp)
594{
595 struct pl2303_private *priv = usb_get_serial_port_data(port);
596 unsigned long flags;
597 unsigned int c_cflag;
598 int bps;
599 long timeout;
600 wait_queue_t wait; \
601
602 dbg("%s - port %d", __FUNCTION__, port->number);
603
604 /* wait for data to drain from the buffer */
605 spin_lock_irqsave(&priv->lock, flags);
606 timeout = PL2303_CLOSING_WAIT;
607 init_waitqueue_entry(&wait, current);
608 add_wait_queue(&port->tty->write_wait, &wait);
609 for (;;) {
610 set_current_state(TASK_INTERRUPTIBLE);
611 if (pl2303_buf_data_avail(priv->buf) == 0
612 || timeout == 0 || signal_pending(current)
613 || !usb_get_intfdata(port->serial->interface)) /* disconnect */
614 break;
615 spin_unlock_irqrestore(&priv->lock, flags);
616 timeout = schedule_timeout(timeout);
617 spin_lock_irqsave(&priv->lock, flags);
618 }
619 set_current_state(TASK_RUNNING);
620 remove_wait_queue(&port->tty->write_wait, &wait);
621 /* clear out any remaining data in the buffer */
622 pl2303_buf_clear(priv->buf);
623 spin_unlock_irqrestore(&priv->lock, flags);
624
625 /* wait for characters to drain from the device */
626 /* (this is long enough for the entire 256 byte */
627 /* pl2303 hardware buffer to drain with no flow */
628 /* control for data rates of 1200 bps or more, */
629 /* for lower rates we should really know how much */
630 /* data is in the buffer to compute a delay */
631 /* that is not unnecessarily long) */
632 bps = tty_get_baud_rate(port->tty);
633 if (bps > 1200)
634 timeout = max((HZ*2560)/bps,HZ/10);
635 else
636 timeout = 2*HZ;
22c43863 637 schedule_timeout_interruptible(timeout);
1da177e4
LT		 638
639 /* shutdown our urbs */
640 dbg("%s - shutting down urbs", __FUNCTION__);
641 usb_kill_urb(port->write_urb);
642 usb_kill_urb(port->read_urb);
643 usb_kill_urb(port->interrupt_in_urb);
644
645 if (port->tty) {
646 c_cflag = port->tty->termios->c_cflag;
647 if (c_cflag & HUPCL) {
648 /* drop DTR and RTS */
649 spin_lock_irqsave(&priv->lock, flags);
650 priv->line_control = 0;
651 spin_unlock_irqrestore (&priv->lock, flags);
652 set_control_lines (port->serial->dev, 0);
653 }
654 }
655}
656
657static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
658 unsigned int set, unsigned int clear)
659{
660 struct pl2303_private *priv = usb_get_serial_port_data(port);
661 unsigned long flags;
662 u8 control;
663
6fdd8e8e
FL		 664 if (!usb_get_intfdata(port->serial->interface))
665 return -ENODEV;
666
1da177e4
LT		 667 spin_lock_irqsave (&priv->lock, flags);
668 if (set & TIOCM_RTS)
669 priv->line_control |= CONTROL_RTS;
670 if (set & TIOCM_DTR)
671 priv->line_control |= CONTROL_DTR;
672 if (clear & TIOCM_RTS)
673 priv->line_control &= ~CONTROL_RTS;
674 if (clear & TIOCM_DTR)
675 priv->line_control &= ~CONTROL_DTR;
676 control = priv->line_control;
677 spin_unlock_irqrestore (&priv->lock, flags);
678
679 return set_control_lines (port->serial->dev, control);
680}
681
682static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file)
683{
684 struct pl2303_private *priv = usb_get_serial_port_data(port);
685 unsigned long flags;
686 unsigned int mcr;
687 unsigned int status;
688 unsigned int result;
689
690 dbg("%s (%d)", __FUNCTION__, port->number);
691
6fdd8e8e
FL		 692 if (!usb_get_intfdata(port->serial->interface))
693 return -ENODEV;
694
1da177e4
LT		 695 spin_lock_irqsave (&priv->lock, flags);
696 mcr = priv->line_control;
697 status = priv->line_status;
698 spin_unlock_irqrestore (&priv->lock, flags);
699
700 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
701 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
702 | ((status & UART_CTS) ? TIOCM_CTS : 0)
703 | ((status & UART_DSR) ? TIOCM_DSR : 0)
704 | ((status & UART_RING) ? TIOCM_RI : 0)
705 | ((status & UART_DCD) ? TIOCM_CD : 0);
706
707 dbg("%s - result = %x", __FUNCTION__, result);
708
709 return result;
710}
711
712static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
713{
714 struct pl2303_private *priv = usb_get_serial_port_data(port);
715 unsigned long flags;
716 unsigned int prevstatus;
717 unsigned int status;
718 unsigned int changed;
719
720 spin_lock_irqsave (&priv->lock, flags);
721 prevstatus = priv->line_status;
722 spin_unlock_irqrestore (&priv->lock, flags);
723
724 while (1) {
725 interruptible_sleep_on(&priv->delta_msr_wait);
726 /* see if a signal did it */
727 if (signal_pending(current))
728 return -ERESTARTSYS;
729
730 spin_lock_irqsave (&priv->lock, flags);
731 status = priv->line_status;
732 spin_unlock_irqrestore (&priv->lock, flags);
733
734 changed=prevstatus^status;
735
736 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
737 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
738 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
739 ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
740 return 0;
741 }
742 prevstatus = status;
743 }
744 /* NOTREACHED */
745 return 0;
746}
747
748static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
749{
750 dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
751
752 switch (cmd) {
753 case TIOCMIWAIT:
754 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
755 return wait_modem_info(port, arg);
756
757 default:
758 dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
759 break;
760 }
761
762 return -ENOIOCTLCMD;
763}
764
765static void pl2303_break_ctl (struct usb_serial_port *port, int break_state)
766{
767 struct usb_serial *serial = port->serial;
768 u16 state;
769 int result;
770
771 dbg("%s - port %d", __FUNCTION__, port->number);
772
773 if (break_state == 0)
774 state = BREAK_OFF;
775 else
776 state = BREAK_ON;
777 dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
778
779 result = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
780 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
781 0, NULL, 0, 100);
782 if (result)
783 dbg("%s - error sending break = %d", __FUNCTION__, result);
784}
785
786
787static void pl2303_shutdown (struct usb_serial *serial)
788{
789 int i;
790 struct pl2303_private *priv;
791
792 dbg("%s", __FUNCTION__);
793
794 for (i = 0; i < serial->num_ports; ++i) {
795 priv = usb_get_serial_port_data(serial->port[i]);
796 if (priv) {
797 pl2303_buf_free(priv->buf);
798 kfree(priv);
799 usb_set_serial_port_data(serial->port[i], NULL);
800 }
801 }
802}
803
97bb13ec
FL		 804static void pl2303_update_line_status(struct usb_serial_port *port,
805 unsigned char *data,
806 unsigned int actual_length)
807{
808
809 struct pl2303_private *priv = usb_get_serial_port_data(port);
810 unsigned long flags;
811 u8 status_idx = UART_STATE;
812 u8 length = UART_STATE;
813
814 if ((le16_to_cpu(port->serial->dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) &&
815 (le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X65)) {
816 length = 1;
817 status_idx = 0;
818 }
819
820 if (actual_length < length)
821 goto exit;
822
823 /* Save off the uart status for others to look at */
824 spin_lock_irqsave(&priv->lock, flags);
825 priv->line_status = data[status_idx];
826 spin_unlock_irqrestore(&priv->lock, flags);
827
828exit:
829 return;
830}
1da177e4
LT		 831
832static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs)
833{
834 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
1da177e4 835 unsigned char *data = urb->transfer_buffer;
97bb13ec 836 unsigned int actual_length = urb->actual_length;
1da177e4 837 int status;
1da177e4
LT		 838
839 dbg("%s (%d)", __FUNCTION__, port->number);
840
841 switch (urb->status) {
842 case 0:
843 /* success */
844 break;
845 case -ECONNRESET:
846 case -ENOENT:
847 case -ESHUTDOWN:
848 /* this urb is terminated, clean up */
849 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
850 return;
851 default:
852 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
853 goto exit;
854 }
855
1da177e4 856 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
97bb13ec 857 pl2303_update_line_status(port, data, actual_length);
1da177e4 858
1da177e4
LT		 859exit:
860 status = usb_submit_urb (urb, GFP_ATOMIC);
861 if (status)
862 dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
863 __FUNCTION__, status);
864}
865
866
867static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
868{
869 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
870 struct pl2303_private *priv = usb_get_serial_port_data(port);
871 struct tty_struct *tty;
872 unsigned char *data = urb->transfer_buffer;
873 unsigned long flags;
874 int i;
875 int result;
876 u8 status;
877 char tty_flag;
878
879 dbg("%s - port %d", __FUNCTION__, port->number);
880
881 if (urb->status) {
882 dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
883 if (!port->open_count) {
884 dbg("%s - port is closed, exiting.", __FUNCTION__);
885 return;
886 }
887 if (urb->status == -EPROTO) {
888 /* PL2303 mysteriously fails with -EPROTO reschedule the read */
889 dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__);
890 urb->status = 0;
891 urb->dev = port->serial->dev;
892 result = usb_submit_urb(urb, GFP_ATOMIC);
893 if (result)
894 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
895 return;
896 }
897 dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
898 return;
899 }
900
901 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
902
903 /* get tty_flag from status */
904 tty_flag = TTY_NORMAL;
905
906 spin_lock_irqsave(&priv->lock, flags);
907 status = priv->line_status;
908 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
909 spin_unlock_irqrestore(&priv->lock, flags);
910 wake_up_interruptible (&priv->delta_msr_wait);
911
912 /* break takes precedence over parity, */
913 /* which takes precedence over framing errors */
914 if (status & UART_BREAK_ERROR )
915 tty_flag = TTY_BREAK;
916 else if (status & UART_PARITY_ERROR)
917 tty_flag = TTY_PARITY;
918 else if (status & UART_FRAME_ERROR)
919 tty_flag = TTY_FRAME;
920 dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
921
922 tty = port->tty;
923 if (tty && urb->actual_length) {
924 /* overrun is special, not associated with a char */
925 if (status & UART_OVERRUN_ERROR)
926 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
927
928 for (i = 0; i < urb->actual_length; ++i) {
929 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
930 tty_flip_buffer_push(tty);
931 }
932 tty_insert_flip_char (tty, data[i], tty_flag);
933 }
934 tty_flip_buffer_push (tty);
935 }
936
937 /* Schedule the next read _if_ we are still open */
938 if (port->open_count) {
939 urb->dev = port->serial->dev;
940 result = usb_submit_urb(urb, GFP_ATOMIC);
941 if (result)
942 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
943 }
944
945 return;
946}
947
948
949
950static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
951{
952 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
953 struct pl2303_private *priv = usb_get_serial_port_data(port);
954 int result;
955
956 dbg("%s - port %d", __FUNCTION__, port->number);
957
958 switch (urb->status) {
959 case 0:
960 /* success */
961 break;
962 case -ECONNRESET:
963 case -ENOENT:
964 case -ESHUTDOWN:
965 /* this urb is terminated, clean up */
966 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
967 priv->write_urb_in_use = 0;
968 return;
969 default:
970 /* error in the urb, so we have to resubmit it */
971 dbg("%s - Overflow in write", __FUNCTION__);
972 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
973 port->write_urb->transfer_buffer_length = 1;
974 port->write_urb->dev = port->serial->dev;
975 result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
976 if (result)
977 dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result);
978 else
979 return;
980 }
981
982 priv->write_urb_in_use = 0;
983
984 /* send any buffered data */
985 pl2303_send(port);
986}
987
988
989/*
990 * pl2303_buf_alloc
991 *
992 * Allocate a circular buffer and all associated memory.
993 */
994
995static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
996{
997
998 struct pl2303_buf *pb;
999
1000
1001 if (size == 0)
1002 return NULL;
1003
1004 pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
1005 if (pb == NULL)
1006 return NULL;
1007
1008 pb->buf_buf = kmalloc(size, GFP_KERNEL);
1009 if (pb->buf_buf == NULL) {
1010 kfree(pb);
1011 return NULL;
1012 }
1013
1014 pb->buf_size = size;
1015 pb->buf_get = pb->buf_put = pb->buf_buf;
1016
1017 return pb;
1018
1019}
1020
1021
1022/*
1023 * pl2303_buf_free
1024 *
1025 * Free the buffer and all associated memory.
1026 */
1027
1028static void pl2303_buf_free(struct pl2303_buf *pb)
1029{
1bc3c9e1
JJ		 1030 if (pb) {
1031 kfree(pb->buf_buf);
1da177e4
LT		 1032 kfree(pb);
1033 }
1034}
1035
1036
1037/*
1038 * pl2303_buf_clear
1039 *
1040 * Clear out all data in the circular buffer.
1041 */
1042
1043static void pl2303_buf_clear(struct pl2303_buf *pb)
1044{
1045 if (pb != NULL)
1046 pb->buf_get = pb->buf_put;
1047 /* equivalent to a get of all data available */
1048}
1049
1050
1051/*
1052 * pl2303_buf_data_avail
1053 *
1054 * Return the number of bytes of data available in the circular
1055 * buffer.
1056 */
1057
1058static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
1059{
1060 if (pb != NULL)
1061 return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
1062 else
1063 return 0;
1064}
1065
1066
1067/*
1068 * pl2303_buf_space_avail
1069 *
1070 * Return the number of bytes of space available in the circular
1071 * buffer.
1072 */
1073
1074static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
1075{
1076 if (pb != NULL)
1077 return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
1078 else
1079 return 0;
1080}
1081
1082
1083/*
1084 * pl2303_buf_put
1085 *
1086 * Copy data data from a user buffer and put it into the circular buffer.
1087 * Restrict to the amount of space available.
1088 *
1089 * Return the number of bytes copied.
1090 */
1091
1092static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
1093 unsigned int count)
1094{
1095
1096 unsigned int len;
1097
1098
1099 if (pb == NULL)
1100 return 0;
1101
1102 len = pl2303_buf_space_avail(pb);
1103 if (count > len)
1104 count = len;
1105
1106 if (count == 0)
1107 return 0;
1108
1109 len = pb->buf_buf + pb->buf_size - pb->buf_put;
1110 if (count > len) {
1111 memcpy(pb->buf_put, buf, len);
1112 memcpy(pb->buf_buf, buf+len, count - len);
1113 pb->buf_put = pb->buf_buf + count - len;
1114 } else {
1115 memcpy(pb->buf_put, buf, count);
1116 if (count < len)
1117 pb->buf_put += count;
1118 else /* count == len */
1119 pb->buf_put = pb->buf_buf;
1120 }
1121
1122 return count;
1123
1124}
1125
1126
1127/*
1128 * pl2303_buf_get
1129 *
1130 * Get data from the circular buffer and copy to the given buffer.
1131 * Restrict to the amount of data available.
1132 *
1133 * Return the number of bytes copied.
1134 */
1135
1136static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
1137 unsigned int count)
1138{
1139
1140 unsigned int len;
1141
1142
1143 if (pb == NULL)
1144 return 0;
1145
1146 len = pl2303_buf_data_avail(pb);
1147 if (count > len)
1148 count = len;
1149
1150 if (count == 0)
1151 return 0;
1152
1153 len = pb->buf_buf + pb->buf_size - pb->buf_get;
1154 if (count > len) {
1155 memcpy(buf, pb->buf_get, len);
1156 memcpy(buf+len, pb->buf_buf, count - len);
1157 pb->buf_get = pb->buf_buf + count - len;
1158 } else {
1159 memcpy(buf, pb->buf_get, count);
1160 if (count < len)
1161 pb->buf_get += count;
1162 else /* count == len */
1163 pb->buf_get = pb->buf_buf;
1164 }
1165
1166 return count;
1167
1168}
1169
1170static int __init pl2303_init (void)
1171{
1172 int retval;
1173 retval = usb_serial_register(&pl2303_device);
1174 if (retval)
1175 goto failed_usb_serial_register;
1176 retval = usb_register(&pl2303_driver);
1177 if (retval)
1178 goto failed_usb_register;
1179 info(DRIVER_DESC " " DRIVER_VERSION);
1180 return 0;
1181failed_usb_register:
1182 usb_serial_deregister(&pl2303_device);
1183failed_usb_serial_register:
1184 return retval;
1185}
1186
1187
1188static void __exit pl2303_exit (void)
1189{
1190 usb_deregister (&pl2303_driver);
1191 usb_serial_deregister (&pl2303_device);
1192}
1193
1194
1195module_init(pl2303_init);
1196module_exit(pl2303_exit);
1197
1198MODULE_DESCRIPTION(DRIVER_DESC);
1199MODULE_VERSION(DRIVER_VERSION);
1200MODULE_LICENSE("GPL");
1201
1202module_param(debug, bool, S_IRUGO | S_IWUSR);
1203MODULE_PARM_DESC(debug, "Debug enabled or not");
1204
kernel source for telekom puls (alcatel/mediatek)