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[PATCH] USB Serial: get rid of the .owner field in usb_serial_driver
[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
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * See Documentation/usb/usb-serial.txt for more information on using this driver
15 *
16 * 2002_Mar_26 gkh
17 * allowed driver to work properly if there is no tty assigned to a port
18 * (this happens for serial console devices.)
19 *
20 * 2001_Oct_06 gkh
21 * Added RTS and DTR line control. Thanks to joe@bndlg.de for parts of it.
22 *
23 * 2001_Sep_19 gkh
24 * Added break support.
25 *
26 * 2001_Aug_30 gkh
27 * fixed oops in write_bulk_callback.
28 *
29 * 2001_Aug_28 gkh
30 * reworked buffer logic to be like other usb-serial drivers. Hopefully
31 * removing some reported problems.
32 *
33 * 2001_Jun_06 gkh
34 * finished porting to 2.4 format.
35 *
36 */
37
38#include <linux/config.h>
39#include <linux/kernel.h>
40#include <linux/errno.h>
41#include <linux/init.h>
42#include <linux/slab.h>
43#include <linux/tty.h>
44#include <linux/tty_driver.h>
45#include <linux/tty_flip.h>
46#include <linux/serial.h>
47#include <linux/module.h>
48#include <linux/moduleparam.h>
49#include <linux/spinlock.h>
50#include <asm/uaccess.h>
51#include <linux/usb.h>
52#include "usb-serial.h"
53#include "pl2303.h"
54
55/*
56 * Version Information
57 */
58#define DRIVER_VERSION "v0.12"
59#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
60
61static int debug;
62
63#define PL2303_CLOSING_WAIT (30*HZ)
64
65#define PL2303_BUF_SIZE 1024
66#define PL2303_TMP_BUF_SIZE 1024
67
68static DECLARE_MUTEX(pl2303_tmp_buf_sem);
69
70struct pl2303_buf {
71 unsigned int buf_size;
72 char *buf_buf;
73 char *buf_get;
74 char *buf_put;
75};
76
77static struct usb_device_id id_table [] = {
78 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
79 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
80 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
81 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
82 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
83 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
84 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
85 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
86 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
87 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
88 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
89 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
90 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
91 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
92 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
93 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
94 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
95 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
96 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
acbb36f1 97 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
68e110a0 98 { USB_DEVICE( NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID ) },
1da177e4
LT		 99 { } /* Terminating entry */
100};
101
102MODULE_DEVICE_TABLE (usb, id_table);
103
104static struct usb_driver pl2303_driver = {
105 .owner = THIS_MODULE,
106 .name = "pl2303",
107 .probe = usb_serial_probe,
108 .disconnect = usb_serial_disconnect,
109 .id_table = id_table,
110};
111
112#define SET_LINE_REQUEST_TYPE 0x21
113#define SET_LINE_REQUEST 0x20
114
115#define SET_CONTROL_REQUEST_TYPE 0x21
116#define SET_CONTROL_REQUEST 0x22
117#define CONTROL_DTR 0x01
118#define CONTROL_RTS 0x02
119
120#define BREAK_REQUEST_TYPE 0x21
121#define BREAK_REQUEST 0x23
122#define BREAK_ON 0xffff
123#define BREAK_OFF 0x0000
124
125#define GET_LINE_REQUEST_TYPE 0xa1
126#define GET_LINE_REQUEST 0x21
127
128#define VENDOR_WRITE_REQUEST_TYPE 0x40
129#define VENDOR_WRITE_REQUEST 0x01
130
131#define VENDOR_READ_REQUEST_TYPE 0xc0
132#define VENDOR_READ_REQUEST 0x01
133
134#define UART_STATE 0x08
135#define UART_STATE_TRANSIENT_MASK 0x74
136#define UART_DCD 0x01
137#define UART_DSR 0x02
138#define UART_BREAK_ERROR 0x04
139#define UART_RING 0x08
140#define UART_FRAME_ERROR 0x10
141#define UART_PARITY_ERROR 0x20
142#define UART_OVERRUN_ERROR 0x40
143#define UART_CTS 0x80
144
145/* function prototypes for a PL2303 serial converter */
146static int pl2303_open (struct usb_serial_port *port, struct file *filp);
147static void pl2303_close (struct usb_serial_port *port, struct file *filp);
148static void pl2303_set_termios (struct usb_serial_port *port,
149 struct termios *old);
150static int pl2303_ioctl (struct usb_serial_port *port, struct file *file,
151 unsigned int cmd, unsigned long arg);
152static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs);
153static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
154static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
155static int pl2303_write (struct usb_serial_port *port,
156 const unsigned char *buf, int count);
157static void pl2303_send (struct usb_serial_port *port);
158static int pl2303_write_room(struct usb_serial_port *port);
159static int pl2303_chars_in_buffer(struct usb_serial_port *port);
160static void pl2303_break_ctl(struct usb_serial_port *port,int break_state);
161static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file);
162static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
163 unsigned int set, unsigned int clear);
164static int pl2303_startup (struct usb_serial *serial);
165static void pl2303_shutdown (struct usb_serial *serial);
166static struct pl2303_buf *pl2303_buf_alloc(unsigned int size);
167static void pl2303_buf_free(struct pl2303_buf *pb);
168static void pl2303_buf_clear(struct pl2303_buf *pb);
169static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb);
170static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb);
171static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
172 unsigned int count);
173static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
174 unsigned int count);
175
176
177/* All of the device info needed for the PL2303 SIO serial converter */
ea65370d 178static struct usb_serial_driver pl2303_device = {
18fcac35
GKH		 179 .driver = {
180 .owner = THIS_MODULE,
181 },
1da177e4
LT		 182 .name = "PL-2303",
183 .id_table = id_table,
184 .num_interrupt_in = NUM_DONT_CARE,
185 .num_bulk_in = 1,
186 .num_bulk_out = 1,
187 .num_ports = 1,
188 .open = pl2303_open,
189 .close = pl2303_close,
190 .write = pl2303_write,
191 .ioctl = pl2303_ioctl,
192 .break_ctl = pl2303_break_ctl,
193 .set_termios = pl2303_set_termios,
194 .tiocmget = pl2303_tiocmget,
195 .tiocmset = pl2303_tiocmset,
196 .read_bulk_callback = pl2303_read_bulk_callback,
197 .read_int_callback = pl2303_read_int_callback,
198 .write_bulk_callback = pl2303_write_bulk_callback,
199 .write_room = pl2303_write_room,
200 .chars_in_buffer = pl2303_chars_in_buffer,
201 .attach = pl2303_startup,
202 .shutdown = pl2303_shutdown,
203};
204
205enum pl2303_type {
206 type_0, /* don't know the difference between type 0 and */
207 type_1, /* type 1, until someone from prolific tells us... */
208 HX, /* HX version of the pl2303 chip */
209};
210
211struct pl2303_private {
212 spinlock_t lock;
213 struct pl2303_buf *buf;
214 int write_urb_in_use;
215 wait_queue_head_t delta_msr_wait;
216 u8 line_control;
217 u8 line_status;
218 u8 termios_initialized;
219 enum pl2303_type type;
220};
221
222
223static int pl2303_startup (struct usb_serial *serial)
224{
225 struct pl2303_private *priv;
226 enum pl2303_type type = type_0;
227 int i;
228
229 if (serial->dev->descriptor.bDeviceClass == 0x02)
230 type = type_0;
231 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
232 type = HX;
233 else if (serial->dev->descriptor.bDeviceClass == 0x00)
234 type = type_1;
235 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
236 type = type_1;
237 dbg("device type: %d", type);
238
239 for (i = 0; i < serial->num_ports; ++i) {
240 priv = kmalloc (sizeof (struct pl2303_private), GFP_KERNEL);
241 if (!priv)
242 goto cleanup;
243 memset (priv, 0x00, sizeof (struct pl2303_private));
244 spin_lock_init(&priv->lock);
245 priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
246 if (priv->buf == NULL) {
247 kfree(priv);
248 goto cleanup;
249 }
250 init_waitqueue_head(&priv->delta_msr_wait);
251 priv->type = type;
252 usb_set_serial_port_data(serial->port[i], priv);
253 }
254 return 0;
255
256cleanup:
257 for (--i; i>=0; --i) {
258 priv = usb_get_serial_port_data(serial->port[i]);
259 pl2303_buf_free(priv->buf);
260 kfree(priv);
261 usb_set_serial_port_data(serial->port[i], NULL);
262 }
263 return -ENOMEM;
264}
265
266static int set_control_lines (struct usb_device *dev, u8 value)
267{
268 int retval;
269
270 retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0),
271 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
272 value, 0, NULL, 0, 100);
273 dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
274 return retval;
275}
276
277static int pl2303_write (struct usb_serial_port *port, const unsigned char *buf, int count)
278{
279 struct pl2303_private *priv = usb_get_serial_port_data(port);
280 unsigned long flags;
281
282 dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
283
284 if (!count)
285 return count;
286
287 spin_lock_irqsave(&priv->lock, flags);
288 count = pl2303_buf_put(priv->buf, buf, count);
289 spin_unlock_irqrestore(&priv->lock, flags);
290
291 pl2303_send(port);
292
293 return count;
294}
295
296static void pl2303_send(struct usb_serial_port *port)
297{
298 int count, result;
299 struct pl2303_private *priv = usb_get_serial_port_data(port);
300 unsigned long flags;
301
302 dbg("%s - port %d", __FUNCTION__, port->number);
303
304 spin_lock_irqsave(&priv->lock, flags);
305
306 if (priv->write_urb_in_use) {
307 spin_unlock_irqrestore(&priv->lock, flags);
308 return;
309 }
310
311 count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
312 port->bulk_out_size);
313
314 if (count == 0) {
315 spin_unlock_irqrestore(&priv->lock, flags);
316 return;
317 }
318
319 priv->write_urb_in_use = 1;
320
321 spin_unlock_irqrestore(&priv->lock, flags);
322
323 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
324
325 port->write_urb->transfer_buffer_length = count;
326 port->write_urb->dev = port->serial->dev;
327 result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
328 if (result) {
329 dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
330 priv->write_urb_in_use = 0;
331 // TODO: reschedule pl2303_send
332 }
333
334 schedule_work(&port->work);
335}
336
337static int pl2303_write_room(struct usb_serial_port *port)
338{
339 struct pl2303_private *priv = usb_get_serial_port_data(port);
340 int room = 0;
341 unsigned long flags;
342
343 dbg("%s - port %d", __FUNCTION__, port->number);
344
345 spin_lock_irqsave(&priv->lock, flags);
346 room = pl2303_buf_space_avail(priv->buf);
347 spin_unlock_irqrestore(&priv->lock, flags);
348
349 dbg("%s - returns %d", __FUNCTION__, room);
350 return room;
351}
352
353static int pl2303_chars_in_buffer(struct usb_serial_port *port)
354{
355 struct pl2303_private *priv = usb_get_serial_port_data(port);
356 int chars = 0;
357 unsigned long flags;
358
359 dbg("%s - port %d", __FUNCTION__, port->number);
360
361 spin_lock_irqsave(&priv->lock, flags);
362 chars = pl2303_buf_data_avail(priv->buf);
363 spin_unlock_irqrestore(&priv->lock, flags);
364
365 dbg("%s - returns %d", __FUNCTION__, chars);
366 return chars;
367}
368
369static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios)
370{
371 struct usb_serial *serial = port->serial;
372 struct pl2303_private *priv = usb_get_serial_port_data(port);
373 unsigned long flags;
374 unsigned int cflag;
375 unsigned char *buf;
376 int baud;
377 int i;
378 u8 control;
379
380 dbg("%s - port %d", __FUNCTION__, port->number);
381
382 if ((!port->tty) || (!port->tty->termios)) {
383 dbg("%s - no tty structures", __FUNCTION__);
384 return;
385 }
386
387 spin_lock_irqsave(&priv->lock, flags);
388 if (!priv->termios_initialized) {
389 *(port->tty->termios) = tty_std_termios;
390 port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
391 priv->termios_initialized = 1;
392 }
393 spin_unlock_irqrestore(&priv->lock, flags);
394
395 cflag = port->tty->termios->c_cflag;
396 /* check that they really want us to change something */
397 if (old_termios) {
398 if ((cflag == old_termios->c_cflag) &&
399 (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
400 dbg("%s - nothing to change...", __FUNCTION__);
401 return;
402 }
403 }
404
405 buf = kmalloc (7, GFP_KERNEL);
406 if (!buf) {
407 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
408 return;
409 }
410 memset (buf, 0x00, 0x07);
411
412 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
413 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
414 0, 0, buf, 7, 100);
415 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
416 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
417
418
419 if (cflag & CSIZE) {
420 switch (cflag & CSIZE) {
421 case CS5: buf[6] = 5; break;
422 case CS6: buf[6] = 6; break;
423 case CS7: buf[6] = 7; break;
424 default:
425 case CS8: buf[6] = 8; break;
426 }
427 dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
428 }
429
430 baud = 0;
431 switch (cflag & CBAUD) {
432 case B0: baud = 0; break;
433 case B75: baud = 75; break;
434 case B150: baud = 150; break;
435 case B300: baud = 300; break;
436 case B600: baud = 600; break;
437 case B1200: baud = 1200; break;
438 case B1800: baud = 1800; break;
439 case B2400: baud = 2400; break;
440 case B4800: baud = 4800; break;
441 case B9600: baud = 9600; break;
442 case B19200: baud = 19200; break;
443 case B38400: baud = 38400; break;
444 case B57600: baud = 57600; break;
445 case B115200: baud = 115200; break;
446 case B230400: baud = 230400; break;
447 case B460800: baud = 460800; break;
448 default:
449 dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n");
450 break;
451 }
452 dbg("%s - baud = %d", __FUNCTION__, baud);
453 if (baud) {
454 buf[0] = baud & 0xff;
455 buf[1] = (baud >> 8) & 0xff;
456 buf[2] = (baud >> 16) & 0xff;
457 buf[3] = (baud >> 24) & 0xff;
458 }
459
460 /* For reference buf[4]=0 is 1 stop bits */
461 /* For reference buf[4]=1 is 1.5 stop bits */
462 /* For reference buf[4]=2 is 2 stop bits */
463 if (cflag & CSTOPB) {
464 buf[4] = 2;
465 dbg("%s - stop bits = 2", __FUNCTION__);
466 } else {
467 buf[4] = 0;
468 dbg("%s - stop bits = 1", __FUNCTION__);
469 }
470
471 if (cflag & PARENB) {
472 /* For reference buf[5]=0 is none parity */
473 /* For reference buf[5]=1 is odd parity */
474 /* For reference buf[5]=2 is even parity */
475 /* For reference buf[5]=3 is mark parity */
476 /* For reference buf[5]=4 is space parity */
477 if (cflag & PARODD) {
478 buf[5] = 1;
479 dbg("%s - parity = odd", __FUNCTION__);
480 } else {
481 buf[5] = 2;
482 dbg("%s - parity = even", __FUNCTION__);
483 }
484 } else {
485 buf[5] = 0;
486 dbg("%s - parity = none", __FUNCTION__);
487 }
488
489 i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
490 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
491 0, 0, buf, 7, 100);
492 dbg ("0x21:0x20:0:0 %d", i);
493
494 /* change control lines if we are switching to or from B0 */
495 spin_lock_irqsave(&priv->lock, flags);
496 control = priv->line_control;
497 if ((cflag & CBAUD) == B0)
498 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
499 else
500 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
501 if (control != priv->line_control) {
502 control = priv->line_control;
503 spin_unlock_irqrestore(&priv->lock, flags);
504 set_control_lines(serial->dev, control);
505 } else {
506 spin_unlock_irqrestore(&priv->lock, flags);
507 }
508
509 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
510
511 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
512 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
513 0, 0, buf, 7, 100);
514 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
515 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
516
517 if (cflag & CRTSCTS) {
518 __u16 index;
519 if (priv->type == HX)
520 index = 0x61;
521 else
522 index = 0x41;
523 i = usb_control_msg(serial->dev,
524 usb_sndctrlpipe(serial->dev, 0),
525 VENDOR_WRITE_REQUEST,
526 VENDOR_WRITE_REQUEST_TYPE,
527 0x0, index, NULL, 0, 100);
528 dbg ("0x40:0x1:0x0:0x%x %d", index, i);
529 }
530
531 kfree (buf);
532}
533
534static int pl2303_open (struct usb_serial_port *port, struct file *filp)
535{
536 struct termios tmp_termios;
537 struct usb_serial *serial = port->serial;
538 struct pl2303_private *priv = usb_get_serial_port_data(port);
539 unsigned char *buf;
540 int result;
541
542 dbg("%s - port %d", __FUNCTION__, port->number);
543
1694899f
D		 544 if (priv->type != HX) {
545 usb_clear_halt(serial->dev, port->write_urb->pipe);
546 usb_clear_halt(serial->dev, port->read_urb->pipe);
547 }
1da177e4
LT		 548
549 buf = kmalloc(10, GFP_KERNEL);
550 if (buf==NULL)
551 return -ENOMEM;
552
553#define FISH(a,b,c,d) \
554 result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
555 b, a, c, d, buf, 1, 100); \
556 dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
557
558#define SOUP(a,b,c,d) \
559 result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
560 b, a, c, d, NULL, 0, 100); \
561 dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
562
563 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
564 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
565 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
566 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
567 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
568 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
569 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
570 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
571 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
572 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
573
574 if (priv->type == HX) {
575 /* HX chip */
576 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
577 /* reset upstream data pipes */
578 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
579 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
580 } else {
581 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
582 }
583
584 kfree(buf);
585
586 /* Setup termios */
587 if (port->tty) {
588 pl2303_set_termios (port, &tmp_termios);
589 }
590
591 //FIXME: need to assert RTS and DTR if CRTSCTS off
592
593 dbg("%s - submitting read urb", __FUNCTION__);
594 port->read_urb->dev = serial->dev;
595 result = usb_submit_urb (port->read_urb, GFP_KERNEL);
596 if (result) {
597 dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
598 pl2303_close (port, NULL);
599 return -EPROTO;
600 }
601
602 dbg("%s - submitting interrupt urb", __FUNCTION__);
603 port->interrupt_in_urb->dev = serial->dev;
604 result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL);
605 if (result) {
606 dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result);
607 pl2303_close (port, NULL);
608 return -EPROTO;
609 }
610 return 0;
611}
612
613
614static void pl2303_close (struct usb_serial_port *port, struct file *filp)
615{
616 struct pl2303_private *priv = usb_get_serial_port_data(port);
617 unsigned long flags;
618 unsigned int c_cflag;
619 int bps;
620 long timeout;
621 wait_queue_t wait; \
622
623 dbg("%s - port %d", __FUNCTION__, port->number);
624
625 /* wait for data to drain from the buffer */
626 spin_lock_irqsave(&priv->lock, flags);
627 timeout = PL2303_CLOSING_WAIT;
628 init_waitqueue_entry(&wait, current);
629 add_wait_queue(&port->tty->write_wait, &wait);
630 for (;;) {
631 set_current_state(TASK_INTERRUPTIBLE);
632 if (pl2303_buf_data_avail(priv->buf) == 0
633 || timeout == 0 || signal_pending(current)
634 || !usb_get_intfdata(port->serial->interface)) /* disconnect */
635 break;
636 spin_unlock_irqrestore(&priv->lock, flags);
637 timeout = schedule_timeout(timeout);
638 spin_lock_irqsave(&priv->lock, flags);
639 }
640 set_current_state(TASK_RUNNING);
641 remove_wait_queue(&port->tty->write_wait, &wait);
642 /* clear out any remaining data in the buffer */
643 pl2303_buf_clear(priv->buf);
644 spin_unlock_irqrestore(&priv->lock, flags);
645
646 /* wait for characters to drain from the device */
647 /* (this is long enough for the entire 256 byte */
648 /* pl2303 hardware buffer to drain with no flow */
649 /* control for data rates of 1200 bps or more, */
650 /* for lower rates we should really know how much */
651 /* data is in the buffer to compute a delay */
652 /* that is not unnecessarily long) */
653 bps = tty_get_baud_rate(port->tty);
654 if (bps > 1200)
655 timeout = max((HZ*2560)/bps,HZ/10);
656 else
657 timeout = 2*HZ;
22c43863 658 schedule_timeout_interruptible(timeout);
1da177e4
LT		 659
660 /* shutdown our urbs */
661 dbg("%s - shutting down urbs", __FUNCTION__);
662 usb_kill_urb(port->write_urb);
663 usb_kill_urb(port->read_urb);
664 usb_kill_urb(port->interrupt_in_urb);
665
666 if (port->tty) {
667 c_cflag = port->tty->termios->c_cflag;
668 if (c_cflag & HUPCL) {
669 /* drop DTR and RTS */
670 spin_lock_irqsave(&priv->lock, flags);
671 priv->line_control = 0;
672 spin_unlock_irqrestore (&priv->lock, flags);
673 set_control_lines (port->serial->dev, 0);
674 }
675 }
676}
677
678static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
679 unsigned int set, unsigned int clear)
680{
681 struct pl2303_private *priv = usb_get_serial_port_data(port);
682 unsigned long flags;
683 u8 control;
684
6fdd8e8e
FL		 685 if (!usb_get_intfdata(port->serial->interface))
686 return -ENODEV;
687
1da177e4
LT		 688 spin_lock_irqsave (&priv->lock, flags);
689 if (set & TIOCM_RTS)
690 priv->line_control |= CONTROL_RTS;
691 if (set & TIOCM_DTR)
692 priv->line_control |= CONTROL_DTR;
693 if (clear & TIOCM_RTS)
694 priv->line_control &= ~CONTROL_RTS;
695 if (clear & TIOCM_DTR)
696 priv->line_control &= ~CONTROL_DTR;
697 control = priv->line_control;
698 spin_unlock_irqrestore (&priv->lock, flags);
699
700 return set_control_lines (port->serial->dev, control);
701}
702
703static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file)
704{
705 struct pl2303_private *priv = usb_get_serial_port_data(port);
706 unsigned long flags;
707 unsigned int mcr;
708 unsigned int status;
709 unsigned int result;
710
711 dbg("%s (%d)", __FUNCTION__, port->number);
712
6fdd8e8e
FL		 713 if (!usb_get_intfdata(port->serial->interface))
714 return -ENODEV;
715
1da177e4
LT		 716 spin_lock_irqsave (&priv->lock, flags);
717 mcr = priv->line_control;
718 status = priv->line_status;
719 spin_unlock_irqrestore (&priv->lock, flags);
720
721 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
722 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
723 | ((status & UART_CTS) ? TIOCM_CTS : 0)
724 | ((status & UART_DSR) ? TIOCM_DSR : 0)
725 | ((status & UART_RING) ? TIOCM_RI : 0)
726 | ((status & UART_DCD) ? TIOCM_CD : 0);
727
728 dbg("%s - result = %x", __FUNCTION__, result);
729
730 return result;
731}
732
733static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
734{
735 struct pl2303_private *priv = usb_get_serial_port_data(port);
736 unsigned long flags;
737 unsigned int prevstatus;
738 unsigned int status;
739 unsigned int changed;
740
741 spin_lock_irqsave (&priv->lock, flags);
742 prevstatus = priv->line_status;
743 spin_unlock_irqrestore (&priv->lock, flags);
744
745 while (1) {
746 interruptible_sleep_on(&priv->delta_msr_wait);
747 /* see if a signal did it */
748 if (signal_pending(current))
749 return -ERESTARTSYS;
750
751 spin_lock_irqsave (&priv->lock, flags);
752 status = priv->line_status;
753 spin_unlock_irqrestore (&priv->lock, flags);
754
755 changed=prevstatus^status;
756
757 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
758 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
759 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
760 ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
761 return 0;
762 }
763 prevstatus = status;
764 }
765 /* NOTREACHED */
766 return 0;
767}
768
769static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
770{
771 dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
772
773 switch (cmd) {
774 case TIOCMIWAIT:
775 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
776 return wait_modem_info(port, arg);
777
778 default:
779 dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
780 break;
781 }
782
783 return -ENOIOCTLCMD;
784}
785
786static void pl2303_break_ctl (struct usb_serial_port *port, int break_state)
787{
788 struct usb_serial *serial = port->serial;
789 u16 state;
790 int result;
791
792 dbg("%s - port %d", __FUNCTION__, port->number);
793
794 if (break_state == 0)
795 state = BREAK_OFF;
796 else
797 state = BREAK_ON;
798 dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
799
800 result = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
801 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
802 0, NULL, 0, 100);
803 if (result)
804 dbg("%s - error sending break = %d", __FUNCTION__, result);
805}
806
807
808static void pl2303_shutdown (struct usb_serial *serial)
809{
810 int i;
811 struct pl2303_private *priv;
812
813 dbg("%s", __FUNCTION__);
814
815 for (i = 0; i < serial->num_ports; ++i) {
816 priv = usb_get_serial_port_data(serial->port[i]);
817 if (priv) {
818 pl2303_buf_free(priv->buf);
819 kfree(priv);
820 usb_set_serial_port_data(serial->port[i], NULL);
821 }
822 }
823}
824
97bb13ec
FL		 825static void pl2303_update_line_status(struct usb_serial_port *port,
826 unsigned char *data,
827 unsigned int actual_length)
828{
829
830 struct pl2303_private *priv = usb_get_serial_port_data(port);
831 unsigned long flags;
832 u8 status_idx = UART_STATE;
833 u8 length = UART_STATE;
834
835 if ((le16_to_cpu(port->serial->dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) &&
836 (le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X65)) {
837 length = 1;
838 status_idx = 0;
839 }
840
841 if (actual_length < length)
842 goto exit;
843
844 /* Save off the uart status for others to look at */
845 spin_lock_irqsave(&priv->lock, flags);
846 priv->line_status = data[status_idx];
847 spin_unlock_irqrestore(&priv->lock, flags);
848
849exit:
850 return;
851}
1da177e4
LT		 852
853static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs)
854{
855 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
1da177e4 856 unsigned char *data = urb->transfer_buffer;
97bb13ec 857 unsigned int actual_length = urb->actual_length;
1da177e4 858 int status;
1da177e4
LT		 859
860 dbg("%s (%d)", __FUNCTION__, port->number);
861
862 switch (urb->status) {
863 case 0:
864 /* success */
865 break;
866 case -ECONNRESET:
867 case -ENOENT:
868 case -ESHUTDOWN:
869 /* this urb is terminated, clean up */
870 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
871 return;
872 default:
873 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
874 goto exit;
875 }
876
1da177e4 877 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
97bb13ec 878 pl2303_update_line_status(port, data, actual_length);
1da177e4 879
1da177e4
LT		 880exit:
881 status = usb_submit_urb (urb, GFP_ATOMIC);
882 if (status)
883 dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
884 __FUNCTION__, status);
885}
886
887
888static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
889{
890 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
891 struct pl2303_private *priv = usb_get_serial_port_data(port);
892 struct tty_struct *tty;
893 unsigned char *data = urb->transfer_buffer;
894 unsigned long flags;
895 int i;
896 int result;
897 u8 status;
898 char tty_flag;
899
900 dbg("%s - port %d", __FUNCTION__, port->number);
901
902 if (urb->status) {
903 dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
904 if (!port->open_count) {
905 dbg("%s - port is closed, exiting.", __FUNCTION__);
906 return;
907 }
908 if (urb->status == -EPROTO) {
909 /* PL2303 mysteriously fails with -EPROTO reschedule the read */
910 dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__);
911 urb->status = 0;
912 urb->dev = port->serial->dev;
913 result = usb_submit_urb(urb, GFP_ATOMIC);
914 if (result)
915 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
916 return;
917 }
918 dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
919 return;
920 }
921
922 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
923
924 /* get tty_flag from status */
925 tty_flag = TTY_NORMAL;
926
927 spin_lock_irqsave(&priv->lock, flags);
928 status = priv->line_status;
929 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
930 spin_unlock_irqrestore(&priv->lock, flags);
931 wake_up_interruptible (&priv->delta_msr_wait);
932
933 /* break takes precedence over parity, */
934 /* which takes precedence over framing errors */
935 if (status & UART_BREAK_ERROR )
936 tty_flag = TTY_BREAK;
937 else if (status & UART_PARITY_ERROR)
938 tty_flag = TTY_PARITY;
939 else if (status & UART_FRAME_ERROR)
940 tty_flag = TTY_FRAME;
941 dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
942
943 tty = port->tty;
944 if (tty && urb->actual_length) {
945 /* overrun is special, not associated with a char */
946 if (status & UART_OVERRUN_ERROR)
947 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
948
949 for (i = 0; i < urb->actual_length; ++i) {
950 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
951 tty_flip_buffer_push(tty);
952 }
953 tty_insert_flip_char (tty, data[i], tty_flag);
954 }
955 tty_flip_buffer_push (tty);
956 }
957
958 /* Schedule the next read _if_ we are still open */
959 if (port->open_count) {
960 urb->dev = port->serial->dev;
961 result = usb_submit_urb(urb, GFP_ATOMIC);
962 if (result)
963 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
964 }
965
966 return;
967}
968
969
970
971static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
972{
973 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
974 struct pl2303_private *priv = usb_get_serial_port_data(port);
975 int result;
976
977 dbg("%s - port %d", __FUNCTION__, port->number);
978
979 switch (urb->status) {
980 case 0:
981 /* success */
982 break;
983 case -ECONNRESET:
984 case -ENOENT:
985 case -ESHUTDOWN:
986 /* this urb is terminated, clean up */
987 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
988 priv->write_urb_in_use = 0;
989 return;
990 default:
991 /* error in the urb, so we have to resubmit it */
992 dbg("%s - Overflow in write", __FUNCTION__);
993 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
994 port->write_urb->transfer_buffer_length = 1;
995 port->write_urb->dev = port->serial->dev;
996 result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
997 if (result)
998 dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result);
999 else
1000 return;
1001 }
1002
1003 priv->write_urb_in_use = 0;
1004
1005 /* send any buffered data */
1006 pl2303_send(port);
1007}
1008
1009
1010/*
1011 * pl2303_buf_alloc
1012 *
1013 * Allocate a circular buffer and all associated memory.
1014 */
1015
1016static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
1017{
1018
1019 struct pl2303_buf *pb;
1020
1021
1022 if (size == 0)
1023 return NULL;
1024
1025 pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
1026 if (pb == NULL)
1027 return NULL;
1028
1029 pb->buf_buf = kmalloc(size, GFP_KERNEL);
1030 if (pb->buf_buf == NULL) {
1031 kfree(pb);
1032 return NULL;
1033 }
1034
1035 pb->buf_size = size;
1036 pb->buf_get = pb->buf_put = pb->buf_buf;
1037
1038 return pb;
1039
1040}
1041
1042
1043/*
1044 * pl2303_buf_free
1045 *
1046 * Free the buffer and all associated memory.
1047 */
1048
1049static void pl2303_buf_free(struct pl2303_buf *pb)
1050{
1bc3c9e1
JJ		 1051 if (pb) {
1052 kfree(pb->buf_buf);
1da177e4
LT		 1053 kfree(pb);
1054 }
1055}
1056
1057
1058/*
1059 * pl2303_buf_clear
1060 *
1061 * Clear out all data in the circular buffer.
1062 */
1063
1064static void pl2303_buf_clear(struct pl2303_buf *pb)
1065{
1066 if (pb != NULL)
1067 pb->buf_get = pb->buf_put;
1068 /* equivalent to a get of all data available */
1069}
1070
1071
1072/*
1073 * pl2303_buf_data_avail
1074 *
1075 * Return the number of bytes of data available in the circular
1076 * buffer.
1077 */
1078
1079static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
1080{
1081 if (pb != NULL)
1082 return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
1083 else
1084 return 0;
1085}
1086
1087
1088/*
1089 * pl2303_buf_space_avail
1090 *
1091 * Return the number of bytes of space available in the circular
1092 * buffer.
1093 */
1094
1095static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
1096{
1097 if (pb != NULL)
1098 return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
1099 else
1100 return 0;
1101}
1102
1103
1104/*
1105 * pl2303_buf_put
1106 *
1107 * Copy data data from a user buffer and put it into the circular buffer.
1108 * Restrict to the amount of space available.
1109 *
1110 * Return the number of bytes copied.
1111 */
1112
1113static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
1114 unsigned int count)
1115{
1116
1117 unsigned int len;
1118
1119
1120 if (pb == NULL)
1121 return 0;
1122
1123 len = pl2303_buf_space_avail(pb);
1124 if (count > len)
1125 count = len;
1126
1127 if (count == 0)
1128 return 0;
1129
1130 len = pb->buf_buf + pb->buf_size - pb->buf_put;
1131 if (count > len) {
1132 memcpy(pb->buf_put, buf, len);
1133 memcpy(pb->buf_buf, buf+len, count - len);
1134 pb->buf_put = pb->buf_buf + count - len;
1135 } else {
1136 memcpy(pb->buf_put, buf, count);
1137 if (count < len)
1138 pb->buf_put += count;
1139 else /* count == len */
1140 pb->buf_put = pb->buf_buf;
1141 }
1142
1143 return count;
1144
1145}
1146
1147
1148/*
1149 * pl2303_buf_get
1150 *
1151 * Get data from the circular buffer and copy to the given buffer.
1152 * Restrict to the amount of data available.
1153 *
1154 * Return the number of bytes copied.
1155 */
1156
1157static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
1158 unsigned int count)
1159{
1160
1161 unsigned int len;
1162
1163
1164 if (pb == NULL)
1165 return 0;
1166
1167 len = pl2303_buf_data_avail(pb);
1168 if (count > len)
1169 count = len;
1170
1171 if (count == 0)
1172 return 0;
1173
1174 len = pb->buf_buf + pb->buf_size - pb->buf_get;
1175 if (count > len) {
1176 memcpy(buf, pb->buf_get, len);
1177 memcpy(buf+len, pb->buf_buf, count - len);
1178 pb->buf_get = pb->buf_buf + count - len;
1179 } else {
1180 memcpy(buf, pb->buf_get, count);
1181 if (count < len)
1182 pb->buf_get += count;
1183 else /* count == len */
1184 pb->buf_get = pb->buf_buf;
1185 }
1186
1187 return count;
1188
1189}
1190
1191static int __init pl2303_init (void)
1192{
1193 int retval;
1194 retval = usb_serial_register(&pl2303_device);
1195 if (retval)
1196 goto failed_usb_serial_register;
1197 retval = usb_register(&pl2303_driver);
1198 if (retval)
1199 goto failed_usb_register;
1200 info(DRIVER_DESC " " DRIVER_VERSION);
1201 return 0;
1202failed_usb_register:
1203 usb_serial_deregister(&pl2303_device);
1204failed_usb_serial_register:
1205 return retval;
1206}
1207
1208
1209static void __exit pl2303_exit (void)
1210{
1211 usb_deregister (&pl2303_driver);
1212 usb_serial_deregister (&pl2303_device);
1213}
1214
1215
1216module_init(pl2303_init);
1217module_exit(pl2303_exit);
1218
1219MODULE_DESCRIPTION(DRIVER_DESC);
1220MODULE_VERSION(DRIVER_VERSION);
1221MODULE_LICENSE("GPL");
1222
1223module_param(debug, bool, S_IRUGO | S_IWUSR);
1224MODULE_PARM_DESC(debug, "Debug enabled or not");
1225
kernel source for telekom puls (alcatel/mediatek)