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[CONNECTOR]: async connector mode.
[linux-2.6/verdex.git] / drivers / usb / serial / pl2303.c
blob3cf245bdda54d0a877989e5850886562d877c2d9
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
61 static 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
68 static DECLARE_MUTEX(pl2303_tmp_buf_sem);
69
70 struct pl2303_buf {
71 unsigned int buf_size;
72 char *buf_buf;
73 char *buf_get;
74 char *buf_put;
75 };
76
77 static 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) },
97 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
98 { USB_DEVICE( NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID ) },
99 { } /* Terminating entry */
100 };
101
102 MODULE_DEVICE_TABLE (usb, id_table);
103
104 static 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 */
146 static int pl2303_open (struct usb_serial_port *port, struct file *filp);
147 static void pl2303_close (struct usb_serial_port *port, struct file *filp);
148 static void pl2303_set_termios (struct usb_serial_port *port,
149 struct termios *old);
150 static int pl2303_ioctl (struct usb_serial_port *port, struct file *file,
151 unsigned int cmd, unsigned long arg);
152 static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs);
153 static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
154 static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
155 static int pl2303_write (struct usb_serial_port *port,
156 const unsigned char *buf, int count);
157 static void pl2303_send (struct usb_serial_port *port);
158 static int pl2303_write_room(struct usb_serial_port *port);
159 static int pl2303_chars_in_buffer(struct usb_serial_port *port);
160 static void pl2303_break_ctl(struct usb_serial_port *port,int break_state);
161 static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file);
162 static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
163 unsigned int set, unsigned int clear);
164 static int pl2303_startup (struct usb_serial *serial);
165 static void pl2303_shutdown (struct usb_serial *serial);
166 static struct pl2303_buf *pl2303_buf_alloc(unsigned int size);
167 static void pl2303_buf_free(struct pl2303_buf *pb);
168 static void pl2303_buf_clear(struct pl2303_buf *pb);
169 static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb);
170 static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb);
171 static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
172 unsigned int count);
173 static 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 */
178 static struct usb_serial_device_type pl2303_device = {
179 .owner = THIS_MODULE,
180 .name = "PL-2303",
181 .id_table = id_table,
182 .num_interrupt_in = NUM_DONT_CARE,
183 .num_bulk_in = 1,
184 .num_bulk_out = 1,
185 .num_ports = 1,
186 .open = pl2303_open,
187 .close = pl2303_close,
188 .write = pl2303_write,
189 .ioctl = pl2303_ioctl,
190 .break_ctl = pl2303_break_ctl,
191 .set_termios = pl2303_set_termios,
192 .tiocmget = pl2303_tiocmget,
193 .tiocmset = pl2303_tiocmset,
194 .read_bulk_callback = pl2303_read_bulk_callback,
195 .read_int_callback = pl2303_read_int_callback,
196 .write_bulk_callback = pl2303_write_bulk_callback,
197 .write_room = pl2303_write_room,
198 .chars_in_buffer = pl2303_chars_in_buffer,
199 .attach = pl2303_startup,
200 .shutdown = pl2303_shutdown,
201 };
202
203 enum pl2303_type {
204 type_0, /* don't know the difference between type 0 and */
205 type_1, /* type 1, until someone from prolific tells us... */
206 HX, /* HX version of the pl2303 chip */
207 };
208
209 struct pl2303_private {
210 spinlock_t lock;
211 struct pl2303_buf *buf;
212 int write_urb_in_use;
213 wait_queue_head_t delta_msr_wait;
214 u8 line_control;
215 u8 line_status;
216 u8 termios_initialized;
217 enum pl2303_type type;
218 };
219
220
221 static int pl2303_startup (struct usb_serial *serial)
222 {
223 struct pl2303_private *priv;
224 enum pl2303_type type = type_0;
225 int i;
226
227 if (serial->dev->descriptor.bDeviceClass == 0x02)
228 type = type_0;
229 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
230 type = HX;
231 else if (serial->dev->descriptor.bDeviceClass == 0x00)
232 type = type_1;
233 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
234 type = type_1;
235 dbg("device type: %d", type);
236
237 for (i = 0; i < serial->num_ports; ++i) {
238 priv = kmalloc (sizeof (struct pl2303_private), GFP_KERNEL);
239 if (!priv)
240 goto cleanup;
241 memset (priv, 0x00, sizeof (struct pl2303_private));
242 spin_lock_init(&priv->lock);
243 priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
244 if (priv->buf == NULL) {
245 kfree(priv);
246 goto cleanup;
247 }
248 init_waitqueue_head(&priv->delta_msr_wait);
249 priv->type = type;
250 usb_set_serial_port_data(serial->port[i], priv);
251 }
252 return 0;
253
254 cleanup:
255 for (--i; i>=0; --i) {
256 priv = usb_get_serial_port_data(serial->port[i]);
257 pl2303_buf_free(priv->buf);
258 kfree(priv);
259 usb_set_serial_port_data(serial->port[i], NULL);
260 }
261 return -ENOMEM;
262 }
263
264 static int set_control_lines (struct usb_device *dev, u8 value)
265 {
266 int retval;
267
268 retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0),
269 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
270 value, 0, NULL, 0, 100);
271 dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
272 return retval;
273 }
274
275 static int pl2303_write (struct usb_serial_port *port, const unsigned char *buf, int count)
276 {
277 struct pl2303_private *priv = usb_get_serial_port_data(port);
278 unsigned long flags;
279
280 dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
281
282 if (!count)
283 return count;
284
285 spin_lock_irqsave(&priv->lock, flags);
286 count = pl2303_buf_put(priv->buf, buf, count);
287 spin_unlock_irqrestore(&priv->lock, flags);
288
289 pl2303_send(port);
290
291 return count;
292 }
293
294 static void pl2303_send(struct usb_serial_port *port)
295 {
296 int count, result;
297 struct pl2303_private *priv = usb_get_serial_port_data(port);
298 unsigned long flags;
299
300 dbg("%s - port %d", __FUNCTION__, port->number);
301
302 spin_lock_irqsave(&priv->lock, flags);
303
304 if (priv->write_urb_in_use) {
305 spin_unlock_irqrestore(&priv->lock, flags);
306 return;
307 }
308
309 count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
310 port->bulk_out_size);
311
312 if (count == 0) {
313 spin_unlock_irqrestore(&priv->lock, flags);
314 return;
315 }
316
317 priv->write_urb_in_use = 1;
318
319 spin_unlock_irqrestore(&priv->lock, flags);
320
321 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
322
323 port->write_urb->transfer_buffer_length = count;
324 port->write_urb->dev = port->serial->dev;
325 result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
326 if (result) {
327 dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
328 priv->write_urb_in_use = 0;
329 // TODO: reschedule pl2303_send
330 }
331
332 schedule_work(&port->work);
333 }
334
335 static int pl2303_write_room(struct usb_serial_port *port)
336 {
337 struct pl2303_private *priv = usb_get_serial_port_data(port);
338 int room = 0;
339 unsigned long flags;
340
341 dbg("%s - port %d", __FUNCTION__, port->number);
342
343 spin_lock_irqsave(&priv->lock, flags);
344 room = pl2303_buf_space_avail(priv->buf);
345 spin_unlock_irqrestore(&priv->lock, flags);
346
347 dbg("%s - returns %d", __FUNCTION__, room);
348 return room;
349 }
350
351 static int pl2303_chars_in_buffer(struct usb_serial_port *port)
352 {
353 struct pl2303_private *priv = usb_get_serial_port_data(port);
354 int chars = 0;
355 unsigned long flags;
356
357 dbg("%s - port %d", __FUNCTION__, port->number);
358
359 spin_lock_irqsave(&priv->lock, flags);
360 chars = pl2303_buf_data_avail(priv->buf);
361 spin_unlock_irqrestore(&priv->lock, flags);
362
363 dbg("%s - returns %d", __FUNCTION__, chars);
364 return chars;
365 }
366
367 static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios)
368 {
369 struct usb_serial *serial = port->serial;
370 struct pl2303_private *priv = usb_get_serial_port_data(port);
371 unsigned long flags;
372 unsigned int cflag;
373 unsigned char *buf;
374 int baud;
375 int i;
376 u8 control;
377
378 dbg("%s - port %d", __FUNCTION__, port->number);
379
380 if ((!port->tty) || (!port->tty->termios)) {
381 dbg("%s - no tty structures", __FUNCTION__);
382 return;
383 }
384
385 spin_lock_irqsave(&priv->lock, flags);
386 if (!priv->termios_initialized) {
387 *(port->tty->termios) = tty_std_termios;
388 port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
389 priv->termios_initialized = 1;
390 }
391 spin_unlock_irqrestore(&priv->lock, flags);
392
393 cflag = port->tty->termios->c_cflag;
394 /* check that they really want us to change something */
395 if (old_termios) {
396 if ((cflag == old_termios->c_cflag) &&
397 (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
398 dbg("%s - nothing to change...", __FUNCTION__);
399 return;
400 }
401 }
402
403 buf = kmalloc (7, GFP_KERNEL);
404 if (!buf) {
405 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
406 return;
407 }
408 memset (buf, 0x00, 0x07);
409
410 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
411 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
412 0, 0, buf, 7, 100);
413 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
414 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
415
416
417 if (cflag & CSIZE) {
418 switch (cflag & CSIZE) {
419 case CS5: buf[6] = 5; break;
420 case CS6: buf[6] = 6; break;
421 case CS7: buf[6] = 7; break;
422 default:
423 case CS8: buf[6] = 8; break;
424 }
425 dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
426 }
427
428 baud = 0;
429 switch (cflag & CBAUD) {
430 case B0: baud = 0; break;
431 case B75: baud = 75; break;
432 case B150: baud = 150; break;
433 case B300: baud = 300; break;
434 case B600: baud = 600; break;
435 case B1200: baud = 1200; break;
436 case B1800: baud = 1800; break;
437 case B2400: baud = 2400; break;
438 case B4800: baud = 4800; break;
439 case B9600: baud = 9600; break;
440 case B19200: baud = 19200; break;
441 case B38400: baud = 38400; break;
442 case B57600: baud = 57600; break;
443 case B115200: baud = 115200; break;
444 case B230400: baud = 230400; break;
445 case B460800: baud = 460800; break;
446 default:
447 dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n");
448 break;
449 }
450 dbg("%s - baud = %d", __FUNCTION__, baud);
451 if (baud) {
452 buf[0] = baud & 0xff;
453 buf[1] = (baud >> 8) & 0xff;
454 buf[2] = (baud >> 16) & 0xff;
455 buf[3] = (baud >> 24) & 0xff;
456 }
457
458 /* For reference buf[4]=0 is 1 stop bits */
459 /* For reference buf[4]=1 is 1.5 stop bits */
460 /* For reference buf[4]=2 is 2 stop bits */
461 if (cflag & CSTOPB) {
462 buf[4] = 2;
463 dbg("%s - stop bits = 2", __FUNCTION__);
464 } else {
465 buf[4] = 0;
466 dbg("%s - stop bits = 1", __FUNCTION__);
467 }
468
469 if (cflag & PARENB) {
470 /* For reference buf[5]=0 is none parity */
471 /* For reference buf[5]=1 is odd parity */
472 /* For reference buf[5]=2 is even parity */
473 /* For reference buf[5]=3 is mark parity */
474 /* For reference buf[5]=4 is space parity */
475 if (cflag & PARODD) {
476 buf[5] = 1;
477 dbg("%s - parity = odd", __FUNCTION__);
478 } else {
479 buf[5] = 2;
480 dbg("%s - parity = even", __FUNCTION__);
481 }
482 } else {
483 buf[5] = 0;
484 dbg("%s - parity = none", __FUNCTION__);
485 }
486
487 i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
488 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
489 0, 0, buf, 7, 100);
490 dbg ("0x21:0x20:0:0 %d", i);
491
492 /* change control lines if we are switching to or from B0 */
493 spin_lock_irqsave(&priv->lock, flags);
494 control = priv->line_control;
495 if ((cflag & CBAUD) == B0)
496 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
497 else
498 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
499 if (control != priv->line_control) {
500 control = priv->line_control;
501 spin_unlock_irqrestore(&priv->lock, flags);
502 set_control_lines(serial->dev, control);
503 } else {
504 spin_unlock_irqrestore(&priv->lock, flags);
505 }
506
507 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
508
509 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
510 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
511 0, 0, buf, 7, 100);
512 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
513 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
514
515 if (cflag & CRTSCTS) {
516 __u16 index;
517 if (priv->type == HX)
518 index = 0x61;
519 else
520 index = 0x41;
521 i = usb_control_msg(serial->dev,
522 usb_sndctrlpipe(serial->dev, 0),
523 VENDOR_WRITE_REQUEST,
524 VENDOR_WRITE_REQUEST_TYPE,
525 0x0, index, NULL, 0, 100);
526 dbg ("0x40:0x1:0x0:0x%x %d", index, i);
527 }
528
529 kfree (buf);
530 }
531
532 static int pl2303_open (struct usb_serial_port *port, struct file *filp)
533 {
534 struct termios tmp_termios;
535 struct usb_serial *serial = port->serial;
536 struct pl2303_private *priv = usb_get_serial_port_data(port);
537 unsigned char *buf;
538 int result;
539
540 dbg("%s - port %d", __FUNCTION__, port->number);
541
542 if (priv->type != HX) {
543 usb_clear_halt(serial->dev, port->write_urb->pipe);
544 usb_clear_halt(serial->dev, port->read_urb->pipe);
545 }
546
547 buf = kmalloc(10, GFP_KERNEL);
548 if (buf==NULL)
549 return -ENOMEM;
550
551 #define FISH(a,b,c,d) \
552 result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
553 b, a, c, d, buf, 1, 100); \
554 dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
555
556 #define SOUP(a,b,c,d) \
557 result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
558 b, a, c, d, NULL, 0, 100); \
559 dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
560
561 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
562 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
563 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
564 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
565 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
566 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
567 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
568 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
569 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
570 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
571
572 if (priv->type == HX) {
573 /* HX chip */
574 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
575 /* reset upstream data pipes */
576 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
577 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
578 } else {
579 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
580 }
581
582 kfree(buf);
583
584 /* Setup termios */
585 if (port->tty) {
586 pl2303_set_termios (port, &tmp_termios);
587 }
588
589 //FIXME: need to assert RTS and DTR if CRTSCTS off
590
591 dbg("%s - submitting read urb", __FUNCTION__);
592 port->read_urb->dev = serial->dev;
593 result = usb_submit_urb (port->read_urb, GFP_KERNEL);
594 if (result) {
595 dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
596 pl2303_close (port, NULL);
597 return -EPROTO;
598 }
599
600 dbg("%s - submitting interrupt urb", __FUNCTION__);
601 port->interrupt_in_urb->dev = serial->dev;
602 result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL);
603 if (result) {
604 dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result);
605 pl2303_close (port, NULL);
606 return -EPROTO;
607 }
608 return 0;
609 }
610
611
612 static void pl2303_close (struct usb_serial_port *port, struct file *filp)
613 {
614 struct pl2303_private *priv = usb_get_serial_port_data(port);
615 unsigned long flags;
616 unsigned int c_cflag;
617 int bps;
618 long timeout;
619 wait_queue_t wait; \
620
621 dbg("%s - port %d", __FUNCTION__, port->number);
622
623 /* wait for data to drain from the buffer */
624 spin_lock_irqsave(&priv->lock, flags);
625 timeout = PL2303_CLOSING_WAIT;
626 init_waitqueue_entry(&wait, current);
627 add_wait_queue(&port->tty->write_wait, &wait);
628 for (;;) {
629 set_current_state(TASK_INTERRUPTIBLE);
630 if (pl2303_buf_data_avail(priv->buf) == 0
631 || timeout == 0 || signal_pending(current)
632 || !usb_get_intfdata(port->serial->interface)) /* disconnect */
633 break;
634 spin_unlock_irqrestore(&priv->lock, flags);
635 timeout = schedule_timeout(timeout);
636 spin_lock_irqsave(&priv->lock, flags);
637 }
638 set_current_state(TASK_RUNNING);
639 remove_wait_queue(&port->tty->write_wait, &wait);
640 /* clear out any remaining data in the buffer */
641 pl2303_buf_clear(priv->buf);
642 spin_unlock_irqrestore(&priv->lock, flags);
643
644 /* wait for characters to drain from the device */
645 /* (this is long enough for the entire 256 byte */
646 /* pl2303 hardware buffer to drain with no flow */
647 /* control for data rates of 1200 bps or more, */
648 /* for lower rates we should really know how much */
649 /* data is in the buffer to compute a delay */
650 /* that is not unnecessarily long) */
651 bps = tty_get_baud_rate(port->tty);
652 if (bps > 1200)
653 timeout = max((HZ*2560)/bps,HZ/10);
654 else
655 timeout = 2*HZ;
656 schedule_timeout_interruptible(timeout);
657
658 /* shutdown our urbs */
659 dbg("%s - shutting down urbs", __FUNCTION__);
660 usb_kill_urb(port->write_urb);
661 usb_kill_urb(port->read_urb);
662 usb_kill_urb(port->interrupt_in_urb);
663
664 if (port->tty) {
665 c_cflag = port->tty->termios->c_cflag;
666 if (c_cflag & HUPCL) {
667 /* drop DTR and RTS */
668 spin_lock_irqsave(&priv->lock, flags);
669 priv->line_control = 0;
670 spin_unlock_irqrestore (&priv->lock, flags);
671 set_control_lines (port->serial->dev, 0);
672 }
673 }
674 }
675
676 static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
677 unsigned int set, unsigned int clear)
678 {
679 struct pl2303_private *priv = usb_get_serial_port_data(port);
680 unsigned long flags;
681 u8 control;
682
683 if (!usb_get_intfdata(port->serial->interface))
684 return -ENODEV;
685
686 spin_lock_irqsave (&priv->lock, flags);
687 if (set & TIOCM_RTS)
688 priv->line_control |= CONTROL_RTS;
689 if (set & TIOCM_DTR)
690 priv->line_control |= CONTROL_DTR;
691 if (clear & TIOCM_RTS)
692 priv->line_control &= ~CONTROL_RTS;
693 if (clear & TIOCM_DTR)
694 priv->line_control &= ~CONTROL_DTR;
695 control = priv->line_control;
696 spin_unlock_irqrestore (&priv->lock, flags);
697
698 return set_control_lines (port->serial->dev, control);
699 }
700
701 static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file)
702 {
703 struct pl2303_private *priv = usb_get_serial_port_data(port);
704 unsigned long flags;
705 unsigned int mcr;
706 unsigned int status;
707 unsigned int result;
708
709 dbg("%s (%d)", __FUNCTION__, port->number);
710
711 if (!usb_get_intfdata(port->serial->interface))
712 return -ENODEV;
713
714 spin_lock_irqsave (&priv->lock, flags);
715 mcr = priv->line_control;
716 status = priv->line_status;
717 spin_unlock_irqrestore (&priv->lock, flags);
718
719 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
720 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
721 | ((status & UART_CTS) ? TIOCM_CTS : 0)
722 | ((status & UART_DSR) ? TIOCM_DSR : 0)
723 | ((status & UART_RING) ? TIOCM_RI : 0)
724 | ((status & UART_DCD) ? TIOCM_CD : 0);
725
726 dbg("%s - result = %x", __FUNCTION__, result);
727
728 return result;
729 }
730
731 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
732 {
733 struct pl2303_private *priv = usb_get_serial_port_data(port);
734 unsigned long flags;
735 unsigned int prevstatus;
736 unsigned int status;
737 unsigned int changed;
738
739 spin_lock_irqsave (&priv->lock, flags);
740 prevstatus = priv->line_status;
741 spin_unlock_irqrestore (&priv->lock, flags);
742
743 while (1) {
744 interruptible_sleep_on(&priv->delta_msr_wait);
745 /* see if a signal did it */
746 if (signal_pending(current))
747 return -ERESTARTSYS;
748
749 spin_lock_irqsave (&priv->lock, flags);
750 status = priv->line_status;
751 spin_unlock_irqrestore (&priv->lock, flags);
752
753 changed=prevstatus^status;
754
755 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
756 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
757 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
758 ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
759 return 0;
760 }
761 prevstatus = status;
762 }
763 /* NOTREACHED */
764 return 0;
765 }
766
767 static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
768 {
769 dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
770
771 switch (cmd) {
772 case TIOCMIWAIT:
773 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
774 return wait_modem_info(port, arg);
775
776 default:
777 dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
778 break;
779 }
780
781 return -ENOIOCTLCMD;
782 }
783
784 static void pl2303_break_ctl (struct usb_serial_port *port, int break_state)
785 {
786 struct usb_serial *serial = port->serial;
787 u16 state;
788 int result;
789
790 dbg("%s - port %d", __FUNCTION__, port->number);
791
792 if (break_state == 0)
793 state = BREAK_OFF;
794 else
795 state = BREAK_ON;
796 dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
797
798 result = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
799 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
800 0, NULL, 0, 100);
801 if (result)
802 dbg("%s - error sending break = %d", __FUNCTION__, result);
803 }
804
805
806 static void pl2303_shutdown (struct usb_serial *serial)
807 {
808 int i;
809 struct pl2303_private *priv;
810
811 dbg("%s", __FUNCTION__);
812
813 for (i = 0; i < serial->num_ports; ++i) {
814 priv = usb_get_serial_port_data(serial->port[i]);
815 if (priv) {
816 pl2303_buf_free(priv->buf);
817 kfree(priv);
818 usb_set_serial_port_data(serial->port[i], NULL);
819 }
820 }
821 }
822
823 static void pl2303_update_line_status(struct usb_serial_port *port,
824 unsigned char *data,
825 unsigned int actual_length)
826 {
827
828 struct pl2303_private *priv = usb_get_serial_port_data(port);
829 unsigned long flags;
830 u8 status_idx = UART_STATE;
831 u8 length = UART_STATE;
832
833 if ((le16_to_cpu(port->serial->dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) &&
834 (le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X65)) {
835 length = 1;
836 status_idx = 0;
837 }
838
839 if (actual_length < length)
840 goto exit;
841
842 /* Save off the uart status for others to look at */
843 spin_lock_irqsave(&priv->lock, flags);
844 priv->line_status = data[status_idx];
845 spin_unlock_irqrestore(&priv->lock, flags);
846
847 exit:
848 return;
849 }
850
851 static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs)
852 {
853 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
854 unsigned char *data = urb->transfer_buffer;
855 unsigned int actual_length = urb->actual_length;
856 int status;
857
858 dbg("%s (%d)", __FUNCTION__, port->number);
859
860 switch (urb->status) {
861 case 0:
862 /* success */
863 break;
864 case -ECONNRESET:
865 case -ENOENT:
866 case -ESHUTDOWN:
867 /* this urb is terminated, clean up */
868 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
869 return;
870 default:
871 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
872 goto exit;
873 }
874
875 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
876 pl2303_update_line_status(port, data, actual_length);
877
878 exit:
879 status = usb_submit_urb (urb, GFP_ATOMIC);
880 if (status)
881 dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
882 __FUNCTION__, status);
883 }
884
885
886 static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
887 {
888 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
889 struct pl2303_private *priv = usb_get_serial_port_data(port);
890 struct tty_struct *tty;
891 unsigned char *data = urb->transfer_buffer;
892 unsigned long flags;
893 int i;
894 int result;
895 u8 status;
896 char tty_flag;
897
898 dbg("%s - port %d", __FUNCTION__, port->number);
899
900 if (urb->status) {
901 dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
902 if (!port->open_count) {
903 dbg("%s - port is closed, exiting.", __FUNCTION__);
904 return;
905 }
906 if (urb->status == -EPROTO) {
907 /* PL2303 mysteriously fails with -EPROTO reschedule the read */
908 dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__);
909 urb->status = 0;
910 urb->dev = port->serial->dev;
911 result = usb_submit_urb(urb, GFP_ATOMIC);
912 if (result)
913 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
914 return;
915 }
916 dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
917 return;
918 }
919
920 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
921
922 /* get tty_flag from status */
923 tty_flag = TTY_NORMAL;
924
925 spin_lock_irqsave(&priv->lock, flags);
926 status = priv->line_status;
927 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
928 spin_unlock_irqrestore(&priv->lock, flags);
929 wake_up_interruptible (&priv->delta_msr_wait);
930
931 /* break takes precedence over parity, */
932 /* which takes precedence over framing errors */
933 if (status & UART_BREAK_ERROR )
934 tty_flag = TTY_BREAK;
935 else if (status & UART_PARITY_ERROR)
936 tty_flag = TTY_PARITY;
937 else if (status & UART_FRAME_ERROR)
938 tty_flag = TTY_FRAME;
939 dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
940
941 tty = port->tty;
942 if (tty && urb->actual_length) {
943 /* overrun is special, not associated with a char */
944 if (status & UART_OVERRUN_ERROR)
945 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
946
947 for (i = 0; i < urb->actual_length; ++i) {
948 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
949 tty_flip_buffer_push(tty);
950 }
951 tty_insert_flip_char (tty, data[i], tty_flag);
952 }
953 tty_flip_buffer_push (tty);
954 }
955
956 /* Schedule the next read _if_ we are still open */
957 if (port->open_count) {
958 urb->dev = port->serial->dev;
959 result = usb_submit_urb(urb, GFP_ATOMIC);
960 if (result)
961 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
962 }
963
964 return;
965 }
966
967
968
969 static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
970 {
971 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
972 struct pl2303_private *priv = usb_get_serial_port_data(port);
973 int result;
974
975 dbg("%s - port %d", __FUNCTION__, port->number);
976
977 switch (urb->status) {
978 case 0:
979 /* success */
980 break;
981 case -ECONNRESET:
982 case -ENOENT:
983 case -ESHUTDOWN:
984 /* this urb is terminated, clean up */
985 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
986 priv->write_urb_in_use = 0;
987 return;
988 default:
989 /* error in the urb, so we have to resubmit it */
990 dbg("%s - Overflow in write", __FUNCTION__);
991 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
992 port->write_urb->transfer_buffer_length = 1;
993 port->write_urb->dev = port->serial->dev;
994 result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
995 if (result)
996 dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result);
997 else
998 return;
999 }
1000
1001 priv->write_urb_in_use = 0;
1002
1003 /* send any buffered data */
1004 pl2303_send(port);
1005 }
1006
1007
1008 /*
1009 * pl2303_buf_alloc
1010 *
1011 * Allocate a circular buffer and all associated memory.
1012 */
1013
1014 static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
1015 {
1016
1017 struct pl2303_buf *pb;
1018
1019
1020 if (size == 0)
1021 return NULL;
1022
1023 pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
1024 if (pb == NULL)
1025 return NULL;
1026
1027 pb->buf_buf = kmalloc(size, GFP_KERNEL);
1028 if (pb->buf_buf == NULL) {
1029 kfree(pb);
1030 return NULL;
1031 }
1032
1033 pb->buf_size = size;
1034 pb->buf_get = pb->buf_put = pb->buf_buf;
1035
1036 return pb;
1037
1038 }
1039
1040
1041 /*
1042 * pl2303_buf_free
1043 *
1044 * Free the buffer and all associated memory.
1045 */
1046
1047 static void pl2303_buf_free(struct pl2303_buf *pb)
1048 {
1049 if (pb) {
1050 kfree(pb->buf_buf);
1051 kfree(pb);
1052 }
1053 }
1054
1055
1056 /*
1057 * pl2303_buf_clear
1058 *
1059 * Clear out all data in the circular buffer.
1060 */
1061
1062 static void pl2303_buf_clear(struct pl2303_buf *pb)
1063 {
1064 if (pb != NULL)
1065 pb->buf_get = pb->buf_put;
1066 /* equivalent to a get of all data available */
1067 }
1068
1069
1070 /*
1071 * pl2303_buf_data_avail
1072 *
1073 * Return the number of bytes of data available in the circular
1074 * buffer.
1075 */
1076
1077 static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
1078 {
1079 if (pb != NULL)
1080 return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
1081 else
1082 return 0;
1083 }
1084
1085
1086 /*
1087 * pl2303_buf_space_avail
1088 *
1089 * Return the number of bytes of space available in the circular
1090 * buffer.
1091 */
1092
1093 static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
1094 {
1095 if (pb != NULL)
1096 return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
1097 else
1098 return 0;
1099 }
1100
1101
1102 /*
1103 * pl2303_buf_put
1104 *
1105 * Copy data data from a user buffer and put it into the circular buffer.
1106 * Restrict to the amount of space available.
1107 *
1108 * Return the number of bytes copied.
1109 */
1110
1111 static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
1112 unsigned int count)
1113 {
1114
1115 unsigned int len;
1116
1117
1118 if (pb == NULL)
1119 return 0;
1120
1121 len = pl2303_buf_space_avail(pb);
1122 if (count > len)
1123 count = len;
1124
1125 if (count == 0)
1126 return 0;
1127
1128 len = pb->buf_buf + pb->buf_size - pb->buf_put;
1129 if (count > len) {
1130 memcpy(pb->buf_put, buf, len);
1131 memcpy(pb->buf_buf, buf+len, count - len);
1132 pb->buf_put = pb->buf_buf + count - len;
1133 } else {
1134 memcpy(pb->buf_put, buf, count);
1135 if (count < len)
1136 pb->buf_put += count;
1137 else /* count == len */
1138 pb->buf_put = pb->buf_buf;
1139 }
1140
1141 return count;
1142
1143 }
1144
1145
1146 /*
1147 * pl2303_buf_get
1148 *
1149 * Get data from the circular buffer and copy to the given buffer.
1150 * Restrict to the amount of data available.
1151 *
1152 * Return the number of bytes copied.
1153 */
1154
1155 static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
1156 unsigned int count)
1157 {
1158
1159 unsigned int len;
1160
1161
1162 if (pb == NULL)
1163 return 0;
1164
1165 len = pl2303_buf_data_avail(pb);
1166 if (count > len)
1167 count = len;
1168
1169 if (count == 0)
1170 return 0;
1171
1172 len = pb->buf_buf + pb->buf_size - pb->buf_get;
1173 if (count > len) {
1174 memcpy(buf, pb->buf_get, len);
1175 memcpy(buf+len, pb->buf_buf, count - len);
1176 pb->buf_get = pb->buf_buf + count - len;
1177 } else {
1178 memcpy(buf, pb->buf_get, count);
1179 if (count < len)
1180 pb->buf_get += count;
1181 else /* count == len */
1182 pb->buf_get = pb->buf_buf;
1183 }
1184
1185 return count;
1186
1187 }
1188
1189 static int __init pl2303_init (void)
1190 {
1191 int retval;
1192 retval = usb_serial_register(&pl2303_device);
1193 if (retval)
1194 goto failed_usb_serial_register;
1195 retval = usb_register(&pl2303_driver);
1196 if (retval)
1197 goto failed_usb_register;
1198 info(DRIVER_DESC " " DRIVER_VERSION);
1199 return 0;
1200 failed_usb_register:
1201 usb_serial_deregister(&pl2303_device);
1202 failed_usb_serial_register:
1203 return retval;
1204 }
1205
1206
1207 static void __exit pl2303_exit (void)
1208 {
1209 usb_deregister (&pl2303_driver);
1210 usb_serial_deregister (&pl2303_device);
1211 }
1212
1213
1214 module_init(pl2303_init);
1215 module_exit(pl2303_exit);
1216
1217 MODULE_DESCRIPTION(DRIVER_DESC);
1218 MODULE_VERSION(DRIVER_VERSION);
1219 MODULE_LICENSE("GPL");
1220
1221 module_param(debug, bool, S_IRUGO | S_IWUSR);
1222 MODULE_PARM_DESC(debug, "Debug enabled or not");
1223
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