?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH] UFS: inode->i_sem is not released in error path
[linux-2.6/verdex.git] / drivers / usb / serial / pl2303.c
blobf037210561905ecd1149e31570a98a112f26dc27
1 /*
2 * Prolific PL2303 USB to serial adaptor driver
3 *
4 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
5 * Copyright (C) 2003 IBM Corp.
6 *
7 * Original driver for 2.2.x by anonymous
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License.
12 *
13 * See Documentation/usb/usb-serial.txt for more information on using this driver
14 *
15 */
16
17 #include <linux/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_DESC "Prolific PL2303 USB to serial adaptor driver"
38
39 static 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
46 static DECLARE_MUTEX(pl2303_tmp_buf_sem);
47
48 struct pl2303_buf {
49 unsigned int buf_size;
50 char *buf_buf;
51 char *buf_get;
52 char *buf_put;
53 };
54
55 static 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_SX1) },
75 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
76 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
77 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
78 { USB_DEVICE( NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID ) },
79 { } /* Terminating entry */
80 };
81
82 MODULE_DEVICE_TABLE (usb, id_table);
83
84 static struct usb_driver pl2303_driver = {
85 .name = "pl2303",
86 .probe = usb_serial_probe,
87 .disconnect = usb_serial_disconnect,
88 .id_table = id_table,
89 .no_dynamic_id = 1,
90 };
91
92 #define SET_LINE_REQUEST_TYPE 0x21
93 #define SET_LINE_REQUEST 0x20
94
95 #define SET_CONTROL_REQUEST_TYPE 0x21
96 #define SET_CONTROL_REQUEST 0x22
97 #define CONTROL_DTR 0x01
98 #define CONTROL_RTS 0x02
99
100 #define BREAK_REQUEST_TYPE 0x21
101 #define BREAK_REQUEST 0x23
102 #define BREAK_ON 0xffff
103 #define BREAK_OFF 0x0000
104
105 #define GET_LINE_REQUEST_TYPE 0xa1
106 #define GET_LINE_REQUEST 0x21
107
108 #define VENDOR_WRITE_REQUEST_TYPE 0x40
109 #define VENDOR_WRITE_REQUEST 0x01
110
111 #define VENDOR_READ_REQUEST_TYPE 0xc0
112 #define VENDOR_READ_REQUEST 0x01
113
114 #define UART_STATE 0x08
115 #define UART_STATE_TRANSIENT_MASK 0x74
116 #define UART_DCD 0x01
117 #define UART_DSR 0x02
118 #define UART_BREAK_ERROR 0x04
119 #define UART_RING 0x08
120 #define UART_FRAME_ERROR 0x10
121 #define UART_PARITY_ERROR 0x20
122 #define UART_OVERRUN_ERROR 0x40
123 #define UART_CTS 0x80
124
125 /* function prototypes for a PL2303 serial converter */
126 static int pl2303_open (struct usb_serial_port *port, struct file *filp);
127 static void pl2303_close (struct usb_serial_port *port, struct file *filp);
128 static void pl2303_set_termios (struct usb_serial_port *port,
129 struct termios *old);
130 static int pl2303_ioctl (struct usb_serial_port *port, struct file *file,
131 unsigned int cmd, unsigned long arg);
132 static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs);
133 static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
134 static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
135 static int pl2303_write (struct usb_serial_port *port,
136 const unsigned char *buf, int count);
137 static void pl2303_send (struct usb_serial_port *port);
138 static int pl2303_write_room(struct usb_serial_port *port);
139 static int pl2303_chars_in_buffer(struct usb_serial_port *port);
140 static void pl2303_break_ctl(struct usb_serial_port *port,int break_state);
141 static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file);
142 static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
143 unsigned int set, unsigned int clear);
144 static int pl2303_startup (struct usb_serial *serial);
145 static void pl2303_shutdown (struct usb_serial *serial);
146 static struct pl2303_buf *pl2303_buf_alloc(unsigned int size);
147 static void pl2303_buf_free(struct pl2303_buf *pb);
148 static void pl2303_buf_clear(struct pl2303_buf *pb);
149 static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb);
150 static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb);
151 static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
152 unsigned int count);
153 static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
154 unsigned int count);
155
156
157 /* All of the device info needed for the PL2303 SIO serial converter */
158 static struct usb_serial_driver pl2303_device = {
159 .driver = {
160 .owner = THIS_MODULE,
161 .name = "pl2303",
162 },
163 .id_table = id_table,
164 .num_interrupt_in = NUM_DONT_CARE,
165 .num_bulk_in = 1,
166 .num_bulk_out = 1,
167 .num_ports = 1,
168 .open = pl2303_open,
169 .close = pl2303_close,
170 .write = pl2303_write,
171 .ioctl = pl2303_ioctl,
172 .break_ctl = pl2303_break_ctl,
173 .set_termios = pl2303_set_termios,
174 .tiocmget = pl2303_tiocmget,
175 .tiocmset = pl2303_tiocmset,
176 .read_bulk_callback = pl2303_read_bulk_callback,
177 .read_int_callback = pl2303_read_int_callback,
178 .write_bulk_callback = pl2303_write_bulk_callback,
179 .write_room = pl2303_write_room,
180 .chars_in_buffer = pl2303_chars_in_buffer,
181 .attach = pl2303_startup,
182 .shutdown = pl2303_shutdown,
183 };
184
185 enum pl2303_type {
186 type_0, /* don't know the difference between type 0 and */
187 type_1, /* type 1, until someone from prolific tells us... */
188 HX, /* HX version of the pl2303 chip */
189 };
190
191 struct pl2303_private {
192 spinlock_t lock;
193 struct pl2303_buf *buf;
194 int write_urb_in_use;
195 wait_queue_head_t delta_msr_wait;
196 u8 line_control;
197 u8 line_status;
198 u8 termios_initialized;
199 enum pl2303_type type;
200 };
201
202
203 static int pl2303_startup (struct usb_serial *serial)
204 {
205 struct pl2303_private *priv;
206 enum pl2303_type type = type_0;
207 int i;
208
209 if (serial->dev->descriptor.bDeviceClass == 0x02)
210 type = type_0;
211 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
212 type = HX;
213 else if (serial->dev->descriptor.bDeviceClass == 0x00)
214 type = type_1;
215 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
216 type = type_1;
217 dbg("device type: %d", type);
218
219 for (i = 0; i < serial->num_ports; ++i) {
220 priv = kmalloc (sizeof (struct pl2303_private), GFP_KERNEL);
221 if (!priv)
222 goto cleanup;
223 memset (priv, 0x00, sizeof (struct pl2303_private));
224 spin_lock_init(&priv->lock);
225 priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
226 if (priv->buf == NULL) {
227 kfree(priv);
228 goto cleanup;
229 }
230 init_waitqueue_head(&priv->delta_msr_wait);
231 priv->type = type;
232 usb_set_serial_port_data(serial->port[i], priv);
233 }
234 return 0;
235
236 cleanup:
237 for (--i; i>=0; --i) {
238 priv = usb_get_serial_port_data(serial->port[i]);
239 pl2303_buf_free(priv->buf);
240 kfree(priv);
241 usb_set_serial_port_data(serial->port[i], NULL);
242 }
243 return -ENOMEM;
244 }
245
246 static int set_control_lines (struct usb_device *dev, u8 value)
247 {
248 int retval;
249
250 retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0),
251 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
252 value, 0, NULL, 0, 100);
253 dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
254 return retval;
255 }
256
257 static int pl2303_write (struct usb_serial_port *port, const unsigned char *buf, int count)
258 {
259 struct pl2303_private *priv = usb_get_serial_port_data(port);
260 unsigned long flags;
261
262 dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
263
264 if (!count)
265 return count;
266
267 spin_lock_irqsave(&priv->lock, flags);
268 count = pl2303_buf_put(priv->buf, buf, count);
269 spin_unlock_irqrestore(&priv->lock, flags);
270
271 pl2303_send(port);
272
273 return count;
274 }
275
276 static void pl2303_send(struct usb_serial_port *port)
277 {
278 int count, result;
279 struct pl2303_private *priv = usb_get_serial_port_data(port);
280 unsigned long flags;
281
282 dbg("%s - port %d", __FUNCTION__, port->number);
283
284 spin_lock_irqsave(&priv->lock, flags);
285
286 if (priv->write_urb_in_use) {
287 spin_unlock_irqrestore(&priv->lock, flags);
288 return;
289 }
290
291 count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
292 port->bulk_out_size);
293
294 if (count == 0) {
295 spin_unlock_irqrestore(&priv->lock, flags);
296 return;
297 }
298
299 priv->write_urb_in_use = 1;
300
301 spin_unlock_irqrestore(&priv->lock, flags);
302
303 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
304
305 port->write_urb->transfer_buffer_length = count;
306 port->write_urb->dev = port->serial->dev;
307 result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
308 if (result) {
309 dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
310 priv->write_urb_in_use = 0;
311 // TODO: reschedule pl2303_send
312 }
313
314 schedule_work(&port->work);
315 }
316
317 static int pl2303_write_room(struct usb_serial_port *port)
318 {
319 struct pl2303_private *priv = usb_get_serial_port_data(port);
320 int room = 0;
321 unsigned long flags;
322
323 dbg("%s - port %d", __FUNCTION__, port->number);
324
325 spin_lock_irqsave(&priv->lock, flags);
326 room = pl2303_buf_space_avail(priv->buf);
327 spin_unlock_irqrestore(&priv->lock, flags);
328
329 dbg("%s - returns %d", __FUNCTION__, room);
330 return room;
331 }
332
333 static int pl2303_chars_in_buffer(struct usb_serial_port *port)
334 {
335 struct pl2303_private *priv = usb_get_serial_port_data(port);
336 int chars = 0;
337 unsigned long flags;
338
339 dbg("%s - port %d", __FUNCTION__, port->number);
340
341 spin_lock_irqsave(&priv->lock, flags);
342 chars = pl2303_buf_data_avail(priv->buf);
343 spin_unlock_irqrestore(&priv->lock, flags);
344
345 dbg("%s - returns %d", __FUNCTION__, chars);
346 return chars;
347 }
348
349 static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios)
350 {
351 struct usb_serial *serial = port->serial;
352 struct pl2303_private *priv = usb_get_serial_port_data(port);
353 unsigned long flags;
354 unsigned int cflag;
355 unsigned char *buf;
356 int baud;
357 int i;
358 u8 control;
359
360 dbg("%s - port %d", __FUNCTION__, port->number);
361
362 if ((!port->tty) || (!port->tty->termios)) {
363 dbg("%s - no tty structures", __FUNCTION__);
364 return;
365 }
366
367 spin_lock_irqsave(&priv->lock, flags);
368 if (!priv->termios_initialized) {
369 *(port->tty->termios) = tty_std_termios;
370 port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
371 priv->termios_initialized = 1;
372 }
373 spin_unlock_irqrestore(&priv->lock, flags);
374
375 cflag = port->tty->termios->c_cflag;
376 /* check that they really want us to change something */
377 if (old_termios) {
378 if ((cflag == old_termios->c_cflag) &&
379 (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
380 dbg("%s - nothing to change...", __FUNCTION__);
381 return;
382 }
383 }
384
385 buf = kmalloc (7, GFP_KERNEL);
386 if (!buf) {
387 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
388 return;
389 }
390 memset (buf, 0x00, 0x07);
391
392 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
393 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
394 0, 0, buf, 7, 100);
395 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
396 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
397
398
399 if (cflag & CSIZE) {
400 switch (cflag & CSIZE) {
401 case CS5: buf[6] = 5; break;
402 case CS6: buf[6] = 6; break;
403 case CS7: buf[6] = 7; break;
404 default:
405 case CS8: buf[6] = 8; break;
406 }
407 dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
408 }
409
410 baud = 0;
411 switch (cflag & CBAUD) {
412 case B0: baud = 0; break;
413 case B75: baud = 75; break;
414 case B150: baud = 150; break;
415 case B300: baud = 300; break;
416 case B600: baud = 600; break;
417 case B1200: baud = 1200; break;
418 case B1800: baud = 1800; break;
419 case B2400: baud = 2400; break;
420 case B4800: baud = 4800; break;
421 case B9600: baud = 9600; break;
422 case B19200: baud = 19200; break;
423 case B38400: baud = 38400; break;
424 case B57600: baud = 57600; break;
425 case B115200: baud = 115200; break;
426 case B230400: baud = 230400; break;
427 case B460800: baud = 460800; break;
428 default:
429 dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n");
430 break;
431 }
432 dbg("%s - baud = %d", __FUNCTION__, baud);
433 if (baud) {
434 buf[0] = baud & 0xff;
435 buf[1] = (baud >> 8) & 0xff;
436 buf[2] = (baud >> 16) & 0xff;
437 buf[3] = (baud >> 24) & 0xff;
438 }
439
440 /* For reference buf[4]=0 is 1 stop bits */
441 /* For reference buf[4]=1 is 1.5 stop bits */
442 /* For reference buf[4]=2 is 2 stop bits */
443 if (cflag & CSTOPB) {
444 buf[4] = 2;
445 dbg("%s - stop bits = 2", __FUNCTION__);
446 } else {
447 buf[4] = 0;
448 dbg("%s - stop bits = 1", __FUNCTION__);
449 }
450
451 if (cflag & PARENB) {
452 /* For reference buf[5]=0 is none parity */
453 /* For reference buf[5]=1 is odd parity */
454 /* For reference buf[5]=2 is even parity */
455 /* For reference buf[5]=3 is mark parity */
456 /* For reference buf[5]=4 is space parity */
457 if (cflag & PARODD) {
458 buf[5] = 1;
459 dbg("%s - parity = odd", __FUNCTION__);
460 } else {
461 buf[5] = 2;
462 dbg("%s - parity = even", __FUNCTION__);
463 }
464 } else {
465 buf[5] = 0;
466 dbg("%s - parity = none", __FUNCTION__);
467 }
468
469 i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
470 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
471 0, 0, buf, 7, 100);
472 dbg ("0x21:0x20:0:0 %d", i);
473
474 /* change control lines if we are switching to or from B0 */
475 spin_lock_irqsave(&priv->lock, flags);
476 control = priv->line_control;
477 if ((cflag & CBAUD) == B0)
478 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
479 else
480 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
481 if (control != priv->line_control) {
482 control = priv->line_control;
483 spin_unlock_irqrestore(&priv->lock, flags);
484 set_control_lines(serial->dev, control);
485 } else {
486 spin_unlock_irqrestore(&priv->lock, flags);
487 }
488
489 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
490
491 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
492 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
493 0, 0, buf, 7, 100);
494 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
495 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
496
497 if (cflag & CRTSCTS) {
498 __u16 index;
499 if (priv->type == HX)
500 index = 0x61;
501 else
502 index = 0x41;
503 i = usb_control_msg(serial->dev,
504 usb_sndctrlpipe(serial->dev, 0),
505 VENDOR_WRITE_REQUEST,
506 VENDOR_WRITE_REQUEST_TYPE,
507 0x0, index, NULL, 0, 100);
508 dbg ("0x40:0x1:0x0:0x%x %d", index, i);
509 }
510
511 kfree (buf);
512 }
513
514 static int pl2303_open (struct usb_serial_port *port, struct file *filp)
515 {
516 struct termios tmp_termios;
517 struct usb_serial *serial = port->serial;
518 struct pl2303_private *priv = usb_get_serial_port_data(port);
519 unsigned char *buf;
520 int result;
521
522 dbg("%s - port %d", __FUNCTION__, port->number);
523
524 if (priv->type != HX) {
525 usb_clear_halt(serial->dev, port->write_urb->pipe);
526 usb_clear_halt(serial->dev, port->read_urb->pipe);
527 }
528
529 buf = kmalloc(10, GFP_KERNEL);
530 if (buf==NULL)
531 return -ENOMEM;
532
533 #define FISH(a,b,c,d) \
534 result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
535 b, a, c, d, buf, 1, 100); \
536 dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
537
538 #define SOUP(a,b,c,d) \
539 result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
540 b, a, c, d, NULL, 0, 100); \
541 dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
542
543 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
544 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
545 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
546 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
547 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
548 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
549 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
550 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
551 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
552 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
553
554 if (priv->type == HX) {
555 /* HX chip */
556 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
557 /* reset upstream data pipes */
558 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
559 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
560 } else {
561 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
562 }
563
564 kfree(buf);
565
566 /* Setup termios */
567 if (port->tty) {
568 pl2303_set_termios (port, &tmp_termios);
569 }
570
571 //FIXME: need to assert RTS and DTR if CRTSCTS off
572
573 dbg("%s - submitting read urb", __FUNCTION__);
574 port->read_urb->dev = serial->dev;
575 result = usb_submit_urb (port->read_urb, GFP_KERNEL);
576 if (result) {
577 dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
578 pl2303_close (port, NULL);
579 return -EPROTO;
580 }
581
582 dbg("%s - submitting interrupt urb", __FUNCTION__);
583 port->interrupt_in_urb->dev = serial->dev;
584 result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL);
585 if (result) {
586 dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result);
587 pl2303_close (port, NULL);
588 return -EPROTO;
589 }
590 return 0;
591 }
592
593
594 static void pl2303_close (struct usb_serial_port *port, struct file *filp)
595 {
596 struct pl2303_private *priv = usb_get_serial_port_data(port);
597 unsigned long flags;
598 unsigned int c_cflag;
599 int bps;
600 long timeout;
601 wait_queue_t wait; \
602
603 dbg("%s - port %d", __FUNCTION__, port->number);
604
605 /* wait for data to drain from the buffer */
606 spin_lock_irqsave(&priv->lock, flags);
607 timeout = PL2303_CLOSING_WAIT;
608 init_waitqueue_entry(&wait, current);
609 add_wait_queue(&port->tty->write_wait, &wait);
610 for (;;) {
611 set_current_state(TASK_INTERRUPTIBLE);
612 if (pl2303_buf_data_avail(priv->buf) == 0
613 || timeout == 0 || signal_pending(current)
614 || !usb_get_intfdata(port->serial->interface)) /* disconnect */
615 break;
616 spin_unlock_irqrestore(&priv->lock, flags);
617 timeout = schedule_timeout(timeout);
618 spin_lock_irqsave(&priv->lock, flags);
619 }
620 set_current_state(TASK_RUNNING);
621 remove_wait_queue(&port->tty->write_wait, &wait);
622 /* clear out any remaining data in the buffer */
623 pl2303_buf_clear(priv->buf);
624 spin_unlock_irqrestore(&priv->lock, flags);
625
626 /* wait for characters to drain from the device */
627 /* (this is long enough for the entire 256 byte */
628 /* pl2303 hardware buffer to drain with no flow */
629 /* control for data rates of 1200 bps or more, */
630 /* for lower rates we should really know how much */
631 /* data is in the buffer to compute a delay */
632 /* that is not unnecessarily long) */
633 bps = tty_get_baud_rate(port->tty);
634 if (bps > 1200)
635 timeout = max((HZ*2560)/bps,HZ/10);
636 else
637 timeout = 2*HZ;
638 schedule_timeout_interruptible(timeout);
639
640 /* shutdown our urbs */
641 dbg("%s - shutting down urbs", __FUNCTION__);
642 usb_kill_urb(port->write_urb);
643 usb_kill_urb(port->read_urb);
644 usb_kill_urb(port->interrupt_in_urb);
645
646 if (port->tty) {
647 c_cflag = port->tty->termios->c_cflag;
648 if (c_cflag & HUPCL) {
649 /* drop DTR and RTS */
650 spin_lock_irqsave(&priv->lock, flags);
651 priv->line_control = 0;
652 spin_unlock_irqrestore (&priv->lock, flags);
653 set_control_lines (port->serial->dev, 0);
654 }
655 }
656 }
657
658 static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
659 unsigned int set, unsigned int clear)
660 {
661 struct pl2303_private *priv = usb_get_serial_port_data(port);
662 unsigned long flags;
663 u8 control;
664
665 if (!usb_get_intfdata(port->serial->interface))
666 return -ENODEV;
667
668 spin_lock_irqsave (&priv->lock, flags);
669 if (set & TIOCM_RTS)
670 priv->line_control |= CONTROL_RTS;
671 if (set & TIOCM_DTR)
672 priv->line_control |= CONTROL_DTR;
673 if (clear & TIOCM_RTS)
674 priv->line_control &= ~CONTROL_RTS;
675 if (clear & TIOCM_DTR)
676 priv->line_control &= ~CONTROL_DTR;
677 control = priv->line_control;
678 spin_unlock_irqrestore (&priv->lock, flags);
679
680 return set_control_lines (port->serial->dev, control);
681 }
682
683 static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file)
684 {
685 struct pl2303_private *priv = usb_get_serial_port_data(port);
686 unsigned long flags;
687 unsigned int mcr;
688 unsigned int status;
689 unsigned int result;
690
691 dbg("%s (%d)", __FUNCTION__, port->number);
692
693 if (!usb_get_intfdata(port->serial->interface))
694 return -ENODEV;
695
696 spin_lock_irqsave (&priv->lock, flags);
697 mcr = priv->line_control;
698 status = priv->line_status;
699 spin_unlock_irqrestore (&priv->lock, flags);
700
701 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
702 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
703 | ((status & UART_CTS) ? TIOCM_CTS : 0)
704 | ((status & UART_DSR) ? TIOCM_DSR : 0)
705 | ((status & UART_RING) ? TIOCM_RI : 0)
706 | ((status & UART_DCD) ? TIOCM_CD : 0);
707
708 dbg("%s - result = %x", __FUNCTION__, result);
709
710 return result;
711 }
712
713 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
714 {
715 struct pl2303_private *priv = usb_get_serial_port_data(port);
716 unsigned long flags;
717 unsigned int prevstatus;
718 unsigned int status;
719 unsigned int changed;
720
721 spin_lock_irqsave (&priv->lock, flags);
722 prevstatus = priv->line_status;
723 spin_unlock_irqrestore (&priv->lock, flags);
724
725 while (1) {
726 interruptible_sleep_on(&priv->delta_msr_wait);
727 /* see if a signal did it */
728 if (signal_pending(current))
729 return -ERESTARTSYS;
730
731 spin_lock_irqsave (&priv->lock, flags);
732 status = priv->line_status;
733 spin_unlock_irqrestore (&priv->lock, flags);
734
735 changed=prevstatus^status;
736
737 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
738 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
739 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
740 ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
741 return 0;
742 }
743 prevstatus = status;
744 }
745 /* NOTREACHED */
746 return 0;
747 }
748
749 static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
750 {
751 dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
752
753 switch (cmd) {
754 case TIOCMIWAIT:
755 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
756 return wait_modem_info(port, arg);
757
758 default:
759 dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
760 break;
761 }
762
763 return -ENOIOCTLCMD;
764 }
765
766 static void pl2303_break_ctl (struct usb_serial_port *port, int break_state)
767 {
768 struct usb_serial *serial = port->serial;
769 u16 state;
770 int result;
771
772 dbg("%s - port %d", __FUNCTION__, port->number);
773
774 if (break_state == 0)
775 state = BREAK_OFF;
776 else
777 state = BREAK_ON;
778 dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
779
780 result = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
781 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
782 0, NULL, 0, 100);
783 if (result)
784 dbg("%s - error sending break = %d", __FUNCTION__, result);
785 }
786
787
788 static void pl2303_shutdown (struct usb_serial *serial)
789 {
790 int i;
791 struct pl2303_private *priv;
792
793 dbg("%s", __FUNCTION__);
794
795 for (i = 0; i < serial->num_ports; ++i) {
796 priv = usb_get_serial_port_data(serial->port[i]);
797 if (priv) {
798 pl2303_buf_free(priv->buf);
799 kfree(priv);
800 usb_set_serial_port_data(serial->port[i], NULL);
801 }
802 }
803 }
804
805 static void pl2303_update_line_status(struct usb_serial_port *port,
806 unsigned char *data,
807 unsigned int actual_length)
808 {
809
810 struct pl2303_private *priv = usb_get_serial_port_data(port);
811 unsigned long flags;
812 u8 status_idx = UART_STATE;
813 u8 length = UART_STATE + 1;
814
815 if ((le16_to_cpu(port->serial->dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) &&
816 (le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X65 ||
817 le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_SX1 ||
818 le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X75)) {
819 length = 1;
820 status_idx = 0;
821 }
822
823 if (actual_length < length)
824 goto exit;
825
826 /* Save off the uart status for others to look at */
827 spin_lock_irqsave(&priv->lock, flags);
828 priv->line_status = data[status_idx];
829 spin_unlock_irqrestore(&priv->lock, flags);
830
831 exit:
832 return;
833 }
834
835 static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs)
836 {
837 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
838 unsigned char *data = urb->transfer_buffer;
839 unsigned int actual_length = urb->actual_length;
840 int status;
841
842 dbg("%s (%d)", __FUNCTION__, port->number);
843
844 switch (urb->status) {
845 case 0:
846 /* success */
847 break;
848 case -ECONNRESET:
849 case -ENOENT:
850 case -ESHUTDOWN:
851 /* this urb is terminated, clean up */
852 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
853 return;
854 default:
855 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
856 goto exit;
857 }
858
859 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
860 pl2303_update_line_status(port, data, actual_length);
861
862 exit:
863 status = usb_submit_urb (urb, GFP_ATOMIC);
864 if (status)
865 dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
866 __FUNCTION__, status);
867 }
868
869
870 static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
871 {
872 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
873 struct pl2303_private *priv = usb_get_serial_port_data(port);
874 struct tty_struct *tty;
875 unsigned char *data = urb->transfer_buffer;
876 unsigned long flags;
877 int i;
878 int result;
879 u8 status;
880 char tty_flag;
881
882 dbg("%s - port %d", __FUNCTION__, port->number);
883
884 if (urb->status) {
885 dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
886 if (!port->open_count) {
887 dbg("%s - port is closed, exiting.", __FUNCTION__);
888 return;
889 }
890 if (urb->status == -EPROTO) {
891 /* PL2303 mysteriously fails with -EPROTO reschedule the read */
892 dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__);
893 urb->status = 0;
894 urb->dev = port->serial->dev;
895 result = usb_submit_urb(urb, GFP_ATOMIC);
896 if (result)
897 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
898 return;
899 }
900 dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
901 return;
902 }
903
904 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
905
906 /* get tty_flag from status */
907 tty_flag = TTY_NORMAL;
908
909 spin_lock_irqsave(&priv->lock, flags);
910 status = priv->line_status;
911 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
912 spin_unlock_irqrestore(&priv->lock, flags);
913 wake_up_interruptible (&priv->delta_msr_wait);
914
915 /* break takes precedence over parity, */
916 /* which takes precedence over framing errors */
917 if (status & UART_BREAK_ERROR )
918 tty_flag = TTY_BREAK;
919 else if (status & UART_PARITY_ERROR)
920 tty_flag = TTY_PARITY;
921 else if (status & UART_FRAME_ERROR)
922 tty_flag = TTY_FRAME;
923 dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
924
925 tty = port->tty;
926 if (tty && urb->actual_length) {
927 /* overrun is special, not associated with a char */
928 if (status & UART_OVERRUN_ERROR)
929 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
930
931 for (i = 0; i < urb->actual_length; ++i) {
932 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
933 tty_flip_buffer_push(tty);
934 }
935 tty_insert_flip_char (tty, data[i], tty_flag);
936 }
937 tty_flip_buffer_push (tty);
938 }
939
940 /* Schedule the next read _if_ we are still open */
941 if (port->open_count) {
942 urb->dev = port->serial->dev;
943 result = usb_submit_urb(urb, GFP_ATOMIC);
944 if (result)
945 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
946 }
947
948 return;
949 }
950
951
952
953 static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
954 {
955 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
956 struct pl2303_private *priv = usb_get_serial_port_data(port);
957 int result;
958
959 dbg("%s - port %d", __FUNCTION__, port->number);
960
961 switch (urb->status) {
962 case 0:
963 /* success */
964 break;
965 case -ECONNRESET:
966 case -ENOENT:
967 case -ESHUTDOWN:
968 /* this urb is terminated, clean up */
969 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
970 priv->write_urb_in_use = 0;
971 return;
972 default:
973 /* error in the urb, so we have to resubmit it */
974 dbg("%s - Overflow in write", __FUNCTION__);
975 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
976 port->write_urb->transfer_buffer_length = 1;
977 port->write_urb->dev = port->serial->dev;
978 result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
979 if (result)
980 dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result);
981 else
982 return;
983 }
984
985 priv->write_urb_in_use = 0;
986
987 /* send any buffered data */
988 pl2303_send(port);
989 }
990
991
992 /*
993 * pl2303_buf_alloc
994 *
995 * Allocate a circular buffer and all associated memory.
996 */
997
998 static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
999 {
1000
1001 struct pl2303_buf *pb;
1002
1003
1004 if (size == 0)
1005 return NULL;
1006
1007 pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
1008 if (pb == NULL)
1009 return NULL;
1010
1011 pb->buf_buf = kmalloc(size, GFP_KERNEL);
1012 if (pb->buf_buf == NULL) {
1013 kfree(pb);
1014 return NULL;
1015 }
1016
1017 pb->buf_size = size;
1018 pb->buf_get = pb->buf_put = pb->buf_buf;
1019
1020 return pb;
1021
1022 }
1023
1024
1025 /*
1026 * pl2303_buf_free
1027 *
1028 * Free the buffer and all associated memory.
1029 */
1030
1031 static void pl2303_buf_free(struct pl2303_buf *pb)
1032 {
1033 if (pb) {
1034 kfree(pb->buf_buf);
1035 kfree(pb);
1036 }
1037 }
1038
1039
1040 /*
1041 * pl2303_buf_clear
1042 *
1043 * Clear out all data in the circular buffer.
1044 */
1045
1046 static void pl2303_buf_clear(struct pl2303_buf *pb)
1047 {
1048 if (pb != NULL)
1049 pb->buf_get = pb->buf_put;
1050 /* equivalent to a get of all data available */
1051 }
1052
1053
1054 /*
1055 * pl2303_buf_data_avail
1056 *
1057 * Return the number of bytes of data available in the circular
1058 * buffer.
1059 */
1060
1061 static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
1062 {
1063 if (pb != NULL)
1064 return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
1065 else
1066 return 0;
1067 }
1068
1069
1070 /*
1071 * pl2303_buf_space_avail
1072 *
1073 * Return the number of bytes of space available in the circular
1074 * buffer.
1075 */
1076
1077 static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
1078 {
1079 if (pb != NULL)
1080 return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
1081 else
1082 return 0;
1083 }
1084
1085
1086 /*
1087 * pl2303_buf_put
1088 *
1089 * Copy data data from a user buffer and put it into the circular buffer.
1090 * Restrict to the amount of space available.
1091 *
1092 * Return the number of bytes copied.
1093 */
1094
1095 static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
1096 unsigned int count)
1097 {
1098
1099 unsigned int len;
1100
1101
1102 if (pb == NULL)
1103 return 0;
1104
1105 len = pl2303_buf_space_avail(pb);
1106 if (count > len)
1107 count = len;
1108
1109 if (count == 0)
1110 return 0;
1111
1112 len = pb->buf_buf + pb->buf_size - pb->buf_put;
1113 if (count > len) {
1114 memcpy(pb->buf_put, buf, len);
1115 memcpy(pb->buf_buf, buf+len, count - len);
1116 pb->buf_put = pb->buf_buf + count - len;
1117 } else {
1118 memcpy(pb->buf_put, buf, count);
1119 if (count < len)
1120 pb->buf_put += count;
1121 else /* count == len */
1122 pb->buf_put = pb->buf_buf;
1123 }
1124
1125 return count;
1126
1127 }
1128
1129
1130 /*
1131 * pl2303_buf_get
1132 *
1133 * Get data from the circular buffer and copy to the given buffer.
1134 * Restrict to the amount of data available.
1135 *
1136 * Return the number of bytes copied.
1137 */
1138
1139 static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
1140 unsigned int count)
1141 {
1142
1143 unsigned int len;
1144
1145
1146 if (pb == NULL)
1147 return 0;
1148
1149 len = pl2303_buf_data_avail(pb);
1150 if (count > len)
1151 count = len;
1152
1153 if (count == 0)
1154 return 0;
1155
1156 len = pb->buf_buf + pb->buf_size - pb->buf_get;
1157 if (count > len) {
1158 memcpy(buf, pb->buf_get, len);
1159 memcpy(buf+len, pb->buf_buf, count - len);
1160 pb->buf_get = pb->buf_buf + count - len;
1161 } else {
1162 memcpy(buf, pb->buf_get, count);
1163 if (count < len)
1164 pb->buf_get += count;
1165 else /* count == len */
1166 pb->buf_get = pb->buf_buf;
1167 }
1168
1169 return count;
1170
1171 }
1172
1173 static int __init pl2303_init (void)
1174 {
1175 int retval;
1176 retval = usb_serial_register(&pl2303_device);
1177 if (retval)
1178 goto failed_usb_serial_register;
1179 retval = usb_register(&pl2303_driver);
1180 if (retval)
1181 goto failed_usb_register;
1182 info(DRIVER_DESC);
1183 return 0;
1184 failed_usb_register:
1185 usb_serial_deregister(&pl2303_device);
1186 failed_usb_serial_register:
1187 return retval;
1188 }
1189
1190
1191 static void __exit pl2303_exit (void)
1192 {
1193 usb_deregister (&pl2303_driver);
1194 usb_serial_deregister (&pl2303_device);
1195 }
1196
1197
1198 module_init(pl2303_init);
1199 module_exit(pl2303_exit);
1200
1201 MODULE_DESCRIPTION(DRIVER_DESC);
1202 MODULE_LICENSE("GPL");
1203
1204 module_param(debug, bool, S_IRUGO | S_IWUSR);
1205 MODULE_PARM_DESC(debug, "Debug enabled or not");
1206
Verdex Pro support