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Merge trivial low-risk suspend hotkey bugzilla-5918 into release
[mirror_ubuntu-hirsute-kernel.git] / drivers / usb / serial / pl2303.c
CommitLineData
1da177e4
LT		 1/*
2 * Prolific PL2303 USB to serial adaptor driver
3 *
4 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
5 * Copyright (C) 2003 IBM Corp.
6 *
7 * Original driver for 2.2.x by anonymous
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
502b95c1 11 * the Free Software Foundation; either version 2 of the License.
1da177e4
LT		 12 *
13 * See Documentation/usb/usb-serial.txt for more information on using this driver
14 *
1da177e4
LT		 15 */
16
1da177e4
LT		 17#include <linux/kernel.h>
18#include <linux/errno.h>
19#include <linux/init.h>
20#include <linux/slab.h>
21#include <linux/tty.h>
22#include <linux/tty_driver.h>
23#include <linux/tty_flip.h>
24#include <linux/serial.h>
25#include <linux/module.h>
26#include <linux/moduleparam.h>
27#include <linux/spinlock.h>
28#include <asm/uaccess.h>
29#include <linux/usb.h>
a969888c 30#include <linux/usb/serial.h>
1da177e4
LT		 31#include "pl2303.h"
32
33/*
34 * Version Information
35 */
1da177e4
LT		 36#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
37
38static int debug;
39
40#define PL2303_CLOSING_WAIT (30*HZ)
41
42#define PL2303_BUF_SIZE 1024
43#define PL2303_TMP_BUF_SIZE 1024
44
1da177e4
LT		 45struct pl2303_buf {
46 unsigned int buf_size;
47 char *buf_buf;
48 char *buf_get;
49 char *buf_put;
50};
51
52static struct usb_device_id id_table [] = {
53 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
54 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
3d861494 55 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
1da177e4
LT		 56 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
57 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
58 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
59 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
60 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
61 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
62 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
63 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
58381719 64 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
1da177e4
LT		 65 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
66 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
67 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
68 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
69 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
70 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
71 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
72 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
a8310f3b 73 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
1da177e4 74 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
a8310f3b 75 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
acbb36f1 76 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
c6c27721
CL		 77 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
78 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
6cceb05f 79 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
c6c27721 80 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
491b04ce 81 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
e853bf4a 82 { USB_DEVICE(OTI_VENDOR_ID, OTI_PRODUCT_ID) },
3b928474 83 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
b7aa94b6 84 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
1da177e4
LT		 85 { } /* Terminating entry */
86};
87
88MODULE_DEVICE_TABLE (usb, id_table);
89
90static struct usb_driver pl2303_driver = {
1da177e4
LT		 91 .name = "pl2303",
92 .probe = usb_serial_probe,
93 .disconnect = usb_serial_disconnect,
94 .id_table = id_table,
ba9dc657 95 .no_dynamic_id = 1,
1da177e4
LT		 96};
97
98#define SET_LINE_REQUEST_TYPE 0x21
99#define SET_LINE_REQUEST 0x20
100
101#define SET_CONTROL_REQUEST_TYPE 0x21
102#define SET_CONTROL_REQUEST 0x22
103#define CONTROL_DTR 0x01
104#define CONTROL_RTS 0x02
105
106#define BREAK_REQUEST_TYPE 0x21
107#define BREAK_REQUEST 0x23
108#define BREAK_ON 0xffff
109#define BREAK_OFF 0x0000
110
111#define GET_LINE_REQUEST_TYPE 0xa1
112#define GET_LINE_REQUEST 0x21
113
114#define VENDOR_WRITE_REQUEST_TYPE 0x40
115#define VENDOR_WRITE_REQUEST 0x01
116
117#define VENDOR_READ_REQUEST_TYPE 0xc0
118#define VENDOR_READ_REQUEST 0x01
119
120#define UART_STATE 0x08
121#define UART_STATE_TRANSIENT_MASK 0x74
122#define UART_DCD 0x01
123#define UART_DSR 0x02
124#define UART_BREAK_ERROR 0x04
125#define UART_RING 0x08
126#define UART_FRAME_ERROR 0x10
127#define UART_PARITY_ERROR 0x20
128#define UART_OVERRUN_ERROR 0x40
129#define UART_CTS 0x80
130
131/* function prototypes for a PL2303 serial converter */
132static int pl2303_open (struct usb_serial_port *port, struct file *filp);
133static void pl2303_close (struct usb_serial_port *port, struct file *filp);
134static void pl2303_set_termios (struct usb_serial_port *port,
135 struct termios *old);
136static int pl2303_ioctl (struct usb_serial_port *port, struct file *file,
137 unsigned int cmd, unsigned long arg);
138static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs);
139static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
140static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
141static int pl2303_write (struct usb_serial_port *port,
142 const unsigned char *buf, int count);
143static void pl2303_send (struct usb_serial_port *port);
144static int pl2303_write_room(struct usb_serial_port *port);
145static int pl2303_chars_in_buffer(struct usb_serial_port *port);
146static void pl2303_break_ctl(struct usb_serial_port *port,int break_state);
147static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file);
148static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
149 unsigned int set, unsigned int clear);
150static int pl2303_startup (struct usb_serial *serial);
151static void pl2303_shutdown (struct usb_serial *serial);
152static struct pl2303_buf *pl2303_buf_alloc(unsigned int size);
153static void pl2303_buf_free(struct pl2303_buf *pb);
154static void pl2303_buf_clear(struct pl2303_buf *pb);
155static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb);
156static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb);
157static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
158 unsigned int count);
159static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
160 unsigned int count);
161
162
163/* All of the device info needed for the PL2303 SIO serial converter */
ea65370d 164static struct usb_serial_driver pl2303_device = {
18fcac35
GKH		 165 .driver = {
166 .owner = THIS_MODULE,
269bda1c 167 .name = "pl2303",
18fcac35 168 },
1da177e4
LT		 169 .id_table = id_table,
170 .num_interrupt_in = NUM_DONT_CARE,
171 .num_bulk_in = 1,
172 .num_bulk_out = 1,
173 .num_ports = 1,
174 .open = pl2303_open,
175 .close = pl2303_close,
176 .write = pl2303_write,
177 .ioctl = pl2303_ioctl,
178 .break_ctl = pl2303_break_ctl,
179 .set_termios = pl2303_set_termios,
180 .tiocmget = pl2303_tiocmget,
181 .tiocmset = pl2303_tiocmset,
182 .read_bulk_callback = pl2303_read_bulk_callback,
183 .read_int_callback = pl2303_read_int_callback,
184 .write_bulk_callback = pl2303_write_bulk_callback,
185 .write_room = pl2303_write_room,
186 .chars_in_buffer = pl2303_chars_in_buffer,
187 .attach = pl2303_startup,
188 .shutdown = pl2303_shutdown,
189};
190
191enum pl2303_type {
192 type_0, /* don't know the difference between type 0 and */
193 type_1, /* type 1, until someone from prolific tells us... */
194 HX, /* HX version of the pl2303 chip */
195};
196
197struct pl2303_private {
198 spinlock_t lock;
199 struct pl2303_buf *buf;
200 int write_urb_in_use;
201 wait_queue_head_t delta_msr_wait;
202 u8 line_control;
203 u8 line_status;
204 u8 termios_initialized;
205 enum pl2303_type type;
206};
207
208
209static int pl2303_startup (struct usb_serial *serial)
210{
211 struct pl2303_private *priv;
212 enum pl2303_type type = type_0;
213 int i;
214
215 if (serial->dev->descriptor.bDeviceClass == 0x02)
216 type = type_0;
217 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
218 type = HX;
219 else if (serial->dev->descriptor.bDeviceClass == 0x00)
220 type = type_1;
221 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
222 type = type_1;
223 dbg("device type: %d", type);
224
225 for (i = 0; i < serial->num_ports; ++i) {
80b6ca48 226 priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
1da177e4
LT		 227 if (!priv)
228 goto cleanup;
1da177e4
LT		 229 spin_lock_init(&priv->lock);
230 priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
231 if (priv->buf == NULL) {
232 kfree(priv);
233 goto cleanup;
234 }
235 init_waitqueue_head(&priv->delta_msr_wait);
236 priv->type = type;
237 usb_set_serial_port_data(serial->port[i], priv);
238 }
239 return 0;
240
241cleanup:
242 for (--i; i>=0; --i) {
243 priv = usb_get_serial_port_data(serial->port[i]);
244 pl2303_buf_free(priv->buf);
245 kfree(priv);
246 usb_set_serial_port_data(serial->port[i], NULL);
247 }
248 return -ENOMEM;
249}
250
251static int set_control_lines (struct usb_device *dev, u8 value)
252{
253 int retval;
254
255 retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0),
256 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
257 value, 0, NULL, 0, 100);
258 dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
259 return retval;
260}
261
262static int pl2303_write (struct usb_serial_port *port, const unsigned char *buf, int count)
263{
264 struct pl2303_private *priv = usb_get_serial_port_data(port);
265 unsigned long flags;
266
267 dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
268
269 if (!count)
270 return count;
271
272 spin_lock_irqsave(&priv->lock, flags);
273 count = pl2303_buf_put(priv->buf, buf, count);
274 spin_unlock_irqrestore(&priv->lock, flags);
275
276 pl2303_send(port);
277
278 return count;
279}
280
281static void pl2303_send(struct usb_serial_port *port)
282{
283 int count, result;
284 struct pl2303_private *priv = usb_get_serial_port_data(port);
285 unsigned long flags;
286
287 dbg("%s - port %d", __FUNCTION__, port->number);
288
289 spin_lock_irqsave(&priv->lock, flags);
290
291 if (priv->write_urb_in_use) {
292 spin_unlock_irqrestore(&priv->lock, flags);
293 return;
294 }
295
296 count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
297 port->bulk_out_size);
298
299 if (count == 0) {
300 spin_unlock_irqrestore(&priv->lock, flags);
301 return;
302 }
303
304 priv->write_urb_in_use = 1;
305
306 spin_unlock_irqrestore(&priv->lock, flags);
307
308 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
309
310 port->write_urb->transfer_buffer_length = count;
311 port->write_urb->dev = port->serial->dev;
312 result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
313 if (result) {
314 dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
315 priv->write_urb_in_use = 0;
316 // TODO: reschedule pl2303_send
317 }
318
cf2c7481 319 usb_serial_port_softint(port);
1da177e4
LT		 320}
321
322static int pl2303_write_room(struct usb_serial_port *port)
323{
324 struct pl2303_private *priv = usb_get_serial_port_data(port);
325 int room = 0;
326 unsigned long flags;
327
328 dbg("%s - port %d", __FUNCTION__, port->number);
329
330 spin_lock_irqsave(&priv->lock, flags);
331 room = pl2303_buf_space_avail(priv->buf);
332 spin_unlock_irqrestore(&priv->lock, flags);
333
334 dbg("%s - returns %d", __FUNCTION__, room);
335 return room;
336}
337
338static int pl2303_chars_in_buffer(struct usb_serial_port *port)
339{
340 struct pl2303_private *priv = usb_get_serial_port_data(port);
341 int chars = 0;
342 unsigned long flags;
343
344 dbg("%s - port %d", __FUNCTION__, port->number);
345
346 spin_lock_irqsave(&priv->lock, flags);
347 chars = pl2303_buf_data_avail(priv->buf);
348 spin_unlock_irqrestore(&priv->lock, flags);
349
350 dbg("%s - returns %d", __FUNCTION__, chars);
351 return chars;
352}
353
354static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios)
355{
356 struct usb_serial *serial = port->serial;
357 struct pl2303_private *priv = usb_get_serial_port_data(port);
358 unsigned long flags;
359 unsigned int cflag;
360 unsigned char *buf;
361 int baud;
362 int i;
363 u8 control;
364
365 dbg("%s - port %d", __FUNCTION__, port->number);
366
367 if ((!port->tty) || (!port->tty->termios)) {
368 dbg("%s - no tty structures", __FUNCTION__);
369 return;
370 }
371
372 spin_lock_irqsave(&priv->lock, flags);
373 if (!priv->termios_initialized) {
374 *(port->tty->termios) = tty_std_termios;
375 port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
376 priv->termios_initialized = 1;
377 }
378 spin_unlock_irqrestore(&priv->lock, flags);
379
380 cflag = port->tty->termios->c_cflag;
381 /* check that they really want us to change something */
382 if (old_termios) {
383 if ((cflag == old_termios->c_cflag) &&
384 (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
385 dbg("%s - nothing to change...", __FUNCTION__);
386 return;
387 }
388 }
389
80b6ca48 390 buf = kzalloc (7, GFP_KERNEL);
1da177e4
LT		 391 if (!buf) {
392 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
393 return;
394 }
1da177e4
LT		 395
396 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
397 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
398 0, 0, buf, 7, 100);
399 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
400 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
401
402
403 if (cflag & CSIZE) {
404 switch (cflag & CSIZE) {
405 case CS5: buf[6] = 5; break;
406 case CS6: buf[6] = 6; break;
407 case CS7: buf[6] = 7; break;
408 default:
409 case CS8: buf[6] = 8; break;
410 }
411 dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
412 }
413
414 baud = 0;
415 switch (cflag & CBAUD) {
416 case B0: baud = 0; break;
417 case B75: baud = 75; break;
418 case B150: baud = 150; break;
419 case B300: baud = 300; break;
420 case B600: baud = 600; break;
421 case B1200: baud = 1200; break;
422 case B1800: baud = 1800; break;
423 case B2400: baud = 2400; break;
424 case B4800: baud = 4800; break;
425 case B9600: baud = 9600; break;
426 case B19200: baud = 19200; break;
427 case B38400: baud = 38400; break;
428 case B57600: baud = 57600; break;
429 case B115200: baud = 115200; break;
430 case B230400: baud = 230400; break;
431 case B460800: baud = 460800; break;
432 default:
433 dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n");
434 break;
435 }
436 dbg("%s - baud = %d", __FUNCTION__, baud);
437 if (baud) {
438 buf[0] = baud & 0xff;
439 buf[1] = (baud >> 8) & 0xff;
440 buf[2] = (baud >> 16) & 0xff;
441 buf[3] = (baud >> 24) & 0xff;
442 }
443
444 /* For reference buf[4]=0 is 1 stop bits */
445 /* For reference buf[4]=1 is 1.5 stop bits */
446 /* For reference buf[4]=2 is 2 stop bits */
447 if (cflag & CSTOPB) {
448 buf[4] = 2;
449 dbg("%s - stop bits = 2", __FUNCTION__);
450 } else {
451 buf[4] = 0;
452 dbg("%s - stop bits = 1", __FUNCTION__);
453 }
454
455 if (cflag & PARENB) {
456 /* For reference buf[5]=0 is none parity */
457 /* For reference buf[5]=1 is odd parity */
458 /* For reference buf[5]=2 is even parity */
459 /* For reference buf[5]=3 is mark parity */
460 /* For reference buf[5]=4 is space parity */
461 if (cflag & PARODD) {
462 buf[5] = 1;
463 dbg("%s - parity = odd", __FUNCTION__);
464 } else {
465 buf[5] = 2;
466 dbg("%s - parity = even", __FUNCTION__);
467 }
468 } else {
469 buf[5] = 0;
470 dbg("%s - parity = none", __FUNCTION__);
471 }
472
473 i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
474 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
475 0, 0, buf, 7, 100);
476 dbg ("0x21:0x20:0:0 %d", i);
477
478 /* change control lines if we are switching to or from B0 */
479 spin_lock_irqsave(&priv->lock, flags);
480 control = priv->line_control;
481 if ((cflag & CBAUD) == B0)
482 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
483 else
484 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
485 if (control != priv->line_control) {
486 control = priv->line_control;
487 spin_unlock_irqrestore(&priv->lock, flags);
488 set_control_lines(serial->dev, control);
489 } else {
490 spin_unlock_irqrestore(&priv->lock, flags);
491 }
492
493 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
494
495 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
496 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
497 0, 0, buf, 7, 100);
498 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
499 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
500
501 if (cflag & CRTSCTS) {
502 __u16 index;
503 if (priv->type == HX)
504 index = 0x61;
505 else
506 index = 0x41;
507 i = usb_control_msg(serial->dev,
508 usb_sndctrlpipe(serial->dev, 0),
509 VENDOR_WRITE_REQUEST,
510 VENDOR_WRITE_REQUEST_TYPE,
511 0x0, index, NULL, 0, 100);
512 dbg ("0x40:0x1:0x0:0x%x %d", index, i);
513 }
514
515 kfree (buf);
516}
517
518static int pl2303_open (struct usb_serial_port *port, struct file *filp)
519{
520 struct termios tmp_termios;
521 struct usb_serial *serial = port->serial;
522 struct pl2303_private *priv = usb_get_serial_port_data(port);
523 unsigned char *buf;
524 int result;
525
526 dbg("%s - port %d", __FUNCTION__, port->number);
527
1694899f
D		 528 if (priv->type != HX) {
529 usb_clear_halt(serial->dev, port->write_urb->pipe);
530 usb_clear_halt(serial->dev, port->read_urb->pipe);
531 }
1da177e4
LT		 532
533 buf = kmalloc(10, GFP_KERNEL);
534 if (buf==NULL)
535 return -ENOMEM;
536
537#define FISH(a,b,c,d) \
538 result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
539 b, a, c, d, buf, 1, 100); \
540 dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
541
542#define SOUP(a,b,c,d) \
543 result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
544 b, a, c, d, NULL, 0, 100); \
545 dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
546
547 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
548 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
549 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
550 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
551 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
552 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
553 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
554 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
555 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
556 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
557
558 if (priv->type == HX) {
559 /* HX chip */
560 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
561 /* reset upstream data pipes */
562 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
563 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
564 } else {
565 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
566 }
567
568 kfree(buf);
569
570 /* Setup termios */
571 if (port->tty) {
572 pl2303_set_termios (port, &tmp_termios);
573 }
574
575 //FIXME: need to assert RTS and DTR if CRTSCTS off
576
577 dbg("%s - submitting read urb", __FUNCTION__);
578 port->read_urb->dev = serial->dev;
579 result = usb_submit_urb (port->read_urb, GFP_KERNEL);
580 if (result) {
581 dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
582 pl2303_close (port, NULL);
583 return -EPROTO;
584 }
585
586 dbg("%s - submitting interrupt urb", __FUNCTION__);
587 port->interrupt_in_urb->dev = serial->dev;
588 result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL);
589 if (result) {
590 dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result);
591 pl2303_close (port, NULL);
592 return -EPROTO;
593 }
594 return 0;
595}
596
597
598static void pl2303_close (struct usb_serial_port *port, struct file *filp)
599{
600 struct pl2303_private *priv = usb_get_serial_port_data(port);
601 unsigned long flags;
602 unsigned int c_cflag;
603 int bps;
604 long timeout;
80b47853 605 wait_queue_t wait;
1da177e4
LT		 606
607 dbg("%s - port %d", __FUNCTION__, port->number);
608
609 /* wait for data to drain from the buffer */
610 spin_lock_irqsave(&priv->lock, flags);
611 timeout = PL2303_CLOSING_WAIT;
612 init_waitqueue_entry(&wait, current);
613 add_wait_queue(&port->tty->write_wait, &wait);
614 for (;;) {
615 set_current_state(TASK_INTERRUPTIBLE);
616 if (pl2303_buf_data_avail(priv->buf) == 0
617 || timeout == 0 || signal_pending(current)
618 || !usb_get_intfdata(port->serial->interface)) /* disconnect */
619 break;
620 spin_unlock_irqrestore(&priv->lock, flags);
621 timeout = schedule_timeout(timeout);
622 spin_lock_irqsave(&priv->lock, flags);
623 }
624 set_current_state(TASK_RUNNING);
625 remove_wait_queue(&port->tty->write_wait, &wait);
626 /* clear out any remaining data in the buffer */
627 pl2303_buf_clear(priv->buf);
628 spin_unlock_irqrestore(&priv->lock, flags);
629
630 /* wait for characters to drain from the device */
631 /* (this is long enough for the entire 256 byte */
632 /* pl2303 hardware buffer to drain with no flow */
633 /* control for data rates of 1200 bps or more, */
634 /* for lower rates we should really know how much */
635 /* data is in the buffer to compute a delay */
636 /* that is not unnecessarily long) */
637 bps = tty_get_baud_rate(port->tty);
638 if (bps > 1200)
639 timeout = max((HZ*2560)/bps,HZ/10);
640 else
641 timeout = 2*HZ;
22c43863 642 schedule_timeout_interruptible(timeout);
1da177e4
LT		 643
644 /* shutdown our urbs */
645 dbg("%s - shutting down urbs", __FUNCTION__);
646 usb_kill_urb(port->write_urb);
647 usb_kill_urb(port->read_urb);
648 usb_kill_urb(port->interrupt_in_urb);
649
650 if (port->tty) {
651 c_cflag = port->tty->termios->c_cflag;
652 if (c_cflag & HUPCL) {
653 /* drop DTR and RTS */
654 spin_lock_irqsave(&priv->lock, flags);
655 priv->line_control = 0;
656 spin_unlock_irqrestore (&priv->lock, flags);
657 set_control_lines (port->serial->dev, 0);
658 }
659 }
660}
661
662static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
663 unsigned int set, unsigned int clear)
664{
665 struct pl2303_private *priv = usb_get_serial_port_data(port);
666 unsigned long flags;
667 u8 control;
668
6fdd8e8e
FL		 669 if (!usb_get_intfdata(port->serial->interface))
670 return -ENODEV;
671
1da177e4
LT		 672 spin_lock_irqsave (&priv->lock, flags);
673 if (set & TIOCM_RTS)
674 priv->line_control |= CONTROL_RTS;
675 if (set & TIOCM_DTR)
676 priv->line_control |= CONTROL_DTR;
677 if (clear & TIOCM_RTS)
678 priv->line_control &= ~CONTROL_RTS;
679 if (clear & TIOCM_DTR)
680 priv->line_control &= ~CONTROL_DTR;
681 control = priv->line_control;
682 spin_unlock_irqrestore (&priv->lock, flags);
683
684 return set_control_lines (port->serial->dev, control);
685}
686
687static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file)
688{
689 struct pl2303_private *priv = usb_get_serial_port_data(port);
690 unsigned long flags;
691 unsigned int mcr;
692 unsigned int status;
693 unsigned int result;
694
695 dbg("%s (%d)", __FUNCTION__, port->number);
696
6fdd8e8e
FL		 697 if (!usb_get_intfdata(port->serial->interface))
698 return -ENODEV;
699
1da177e4
LT		 700 spin_lock_irqsave (&priv->lock, flags);
701 mcr = priv->line_control;
702 status = priv->line_status;
703 spin_unlock_irqrestore (&priv->lock, flags);
704
705 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
706 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
707 | ((status & UART_CTS) ? TIOCM_CTS : 0)
708 | ((status & UART_DSR) ? TIOCM_DSR : 0)
709 | ((status & UART_RING) ? TIOCM_RI : 0)
710 | ((status & UART_DCD) ? TIOCM_CD : 0);
711
712 dbg("%s - result = %x", __FUNCTION__, result);
713
714 return result;
715}
716
717static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
718{
719 struct pl2303_private *priv = usb_get_serial_port_data(port);
720 unsigned long flags;
721 unsigned int prevstatus;
722 unsigned int status;
723 unsigned int changed;
724
725 spin_lock_irqsave (&priv->lock, flags);
726 prevstatus = priv->line_status;
727 spin_unlock_irqrestore (&priv->lock, flags);
728
729 while (1) {
730 interruptible_sleep_on(&priv->delta_msr_wait);
731 /* see if a signal did it */
732 if (signal_pending(current))
733 return -ERESTARTSYS;
734
735 spin_lock_irqsave (&priv->lock, flags);
736 status = priv->line_status;
737 spin_unlock_irqrestore (&priv->lock, flags);
738
739 changed=prevstatus^status;
740
741 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
742 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
743 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
744 ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
745 return 0;
746 }
747 prevstatus = status;
748 }
749 /* NOTREACHED */
750 return 0;
751}
752
753static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
754{
755 dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
756
757 switch (cmd) {
758 case TIOCMIWAIT:
759 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
760 return wait_modem_info(port, arg);
761
762 default:
763 dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
764 break;
765 }
766
767 return -ENOIOCTLCMD;
768}
769
770static void pl2303_break_ctl (struct usb_serial_port *port, int break_state)
771{
772 struct usb_serial *serial = port->serial;
773 u16 state;
774 int result;
775
776 dbg("%s - port %d", __FUNCTION__, port->number);
777
778 if (break_state == 0)
779 state = BREAK_OFF;
780 else
781 state = BREAK_ON;
782 dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
783
784 result = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
785 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
786 0, NULL, 0, 100);
787 if (result)
788 dbg("%s - error sending break = %d", __FUNCTION__, result);
789}
790
791
792static void pl2303_shutdown (struct usb_serial *serial)
793{
794 int i;
795 struct pl2303_private *priv;
796
797 dbg("%s", __FUNCTION__);
798
799 for (i = 0; i < serial->num_ports; ++i) {
800 priv = usb_get_serial_port_data(serial->port[i]);
801 if (priv) {
802 pl2303_buf_free(priv->buf);
803 kfree(priv);
804 usb_set_serial_port_data(serial->port[i], NULL);
805 }
806 }
807}
808
97bb13ec
FL		 809static void pl2303_update_line_status(struct usb_serial_port *port,
810 unsigned char *data,
811 unsigned int actual_length)
812{
813
814 struct pl2303_private *priv = usb_get_serial_port_data(port);
815 unsigned long flags;
816 u8 status_idx = UART_STATE;
95f209f9 817 u8 length = UART_STATE + 1;
97bb13ec
FL		 818
819 if ((le16_to_cpu(port->serial->dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) &&
b8f4c1d6
LFC		 820 (le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X65 ||
821 le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_SX1 ||
822 le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X75)) {
97bb13ec
FL		 823 length = 1;
824 status_idx = 0;
825 }
826
827 if (actual_length < length)
828 goto exit;
829
830 /* Save off the uart status for others to look at */
831 spin_lock_irqsave(&priv->lock, flags);
832 priv->line_status = data[status_idx];
833 spin_unlock_irqrestore(&priv->lock, flags);
96050b11 834 wake_up_interruptible (&priv->delta_msr_wait);
97bb13ec
FL		 835
836exit:
837 return;
838}
1da177e4
LT		 839
840static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs)
841{
842 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
1da177e4 843 unsigned char *data = urb->transfer_buffer;
97bb13ec 844 unsigned int actual_length = urb->actual_length;
1da177e4 845 int status;
1da177e4
LT		 846
847 dbg("%s (%d)", __FUNCTION__, port->number);
848
849 switch (urb->status) {
850 case 0:
851 /* success */
852 break;
853 case -ECONNRESET:
854 case -ENOENT:
855 case -ESHUTDOWN:
856 /* this urb is terminated, clean up */
857 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
858 return;
859 default:
860 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
861 goto exit;
862 }
863
1da177e4 864 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
97bb13ec 865 pl2303_update_line_status(port, data, actual_length);
1da177e4 866
1da177e4
LT		 867exit:
868 status = usb_submit_urb (urb, GFP_ATOMIC);
869 if (status)
870 dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
871 __FUNCTION__, status);
872}
873
874
875static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
876{
877 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
878 struct pl2303_private *priv = usb_get_serial_port_data(port);
879 struct tty_struct *tty;
880 unsigned char *data = urb->transfer_buffer;
881 unsigned long flags;
882 int i;
883 int result;
884 u8 status;
885 char tty_flag;
886
887 dbg("%s - port %d", __FUNCTION__, port->number);
888
889 if (urb->status) {
890 dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
891 if (!port->open_count) {
892 dbg("%s - port is closed, exiting.", __FUNCTION__);
893 return;
894 }
895 if (urb->status == -EPROTO) {
896 /* PL2303 mysteriously fails with -EPROTO reschedule the read */
897 dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__);
898 urb->status = 0;
899 urb->dev = port->serial->dev;
900 result = usb_submit_urb(urb, GFP_ATOMIC);
901 if (result)
902 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
903 return;
904 }
905 dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
906 return;
907 }
908
909 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
910
911 /* get tty_flag from status */
912 tty_flag = TTY_NORMAL;
913
914 spin_lock_irqsave(&priv->lock, flags);
915 status = priv->line_status;
916 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
917 spin_unlock_irqrestore(&priv->lock, flags);
918 wake_up_interruptible (&priv->delta_msr_wait);
919
920 /* break takes precedence over parity, */
921 /* which takes precedence over framing errors */
922 if (status & UART_BREAK_ERROR )
923 tty_flag = TTY_BREAK;
924 else if (status & UART_PARITY_ERROR)
925 tty_flag = TTY_PARITY;
926 else if (status & UART_FRAME_ERROR)
927 tty_flag = TTY_FRAME;
928 dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
929
930 tty = port->tty;
931 if (tty && urb->actual_length) {
33f0f88f 932 tty_buffer_request_room(tty, urb->actual_length + 1);
1da177e4
LT		 933 /* overrun is special, not associated with a char */
934 if (status & UART_OVERRUN_ERROR)
935 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
33f0f88f 936 for (i = 0; i < urb->actual_length; ++i)
1da177e4 937 tty_insert_flip_char (tty, data[i], tty_flag);
1da177e4
LT		 938 tty_flip_buffer_push (tty);
939 }
940
941 /* Schedule the next read _if_ we are still open */
942 if (port->open_count) {
943 urb->dev = port->serial->dev;
944 result = usb_submit_urb(urb, GFP_ATOMIC);
945 if (result)
946 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
947 }
948
949 return;
950}
951
952
953
954static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
955{
956 struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
957 struct pl2303_private *priv = usb_get_serial_port_data(port);
958 int result;
959
960 dbg("%s - port %d", __FUNCTION__, port->number);
961
962 switch (urb->status) {
963 case 0:
964 /* success */
965 break;
966 case -ECONNRESET:
967 case -ENOENT:
968 case -ESHUTDOWN:
969 /* this urb is terminated, clean up */
970 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
971 priv->write_urb_in_use = 0;
972 return;
973 default:
974 /* error in the urb, so we have to resubmit it */
975 dbg("%s - Overflow in write", __FUNCTION__);
976 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
977 port->write_urb->transfer_buffer_length = 1;
978 port->write_urb->dev = port->serial->dev;
979 result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
980 if (result)
981 dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result);
982 else
983 return;
984 }
985
986 priv->write_urb_in_use = 0;
987
988 /* send any buffered data */
989 pl2303_send(port);
990}
991
992
993/*
994 * pl2303_buf_alloc
995 *
996 * Allocate a circular buffer and all associated memory.
997 */
998
999static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
1000{
1001
1002 struct pl2303_buf *pb;
1003
1004
1005 if (size == 0)
1006 return NULL;
1007
1008 pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
1009 if (pb == NULL)
1010 return NULL;
1011
1012 pb->buf_buf = kmalloc(size, GFP_KERNEL);
1013 if (pb->buf_buf == NULL) {
1014 kfree(pb);
1015 return NULL;
1016 }
1017
1018 pb->buf_size = size;
1019 pb->buf_get = pb->buf_put = pb->buf_buf;
1020
1021 return pb;
1022
1023}
1024
1025
1026/*
1027 * pl2303_buf_free
1028 *
1029 * Free the buffer and all associated memory.
1030 */
1031
1032static void pl2303_buf_free(struct pl2303_buf *pb)
1033{
1bc3c9e1
JJ		 1034 if (pb) {
1035 kfree(pb->buf_buf);
1da177e4
LT		 1036 kfree(pb);
1037 }
1038}
1039
1040
1041/*
1042 * pl2303_buf_clear
1043 *
1044 * Clear out all data in the circular buffer.
1045 */
1046
1047static void pl2303_buf_clear(struct pl2303_buf *pb)
1048{
1049 if (pb != NULL)
1050 pb->buf_get = pb->buf_put;
1051 /* equivalent to a get of all data available */
1052}
1053
1054
1055/*
1056 * pl2303_buf_data_avail
1057 *
1058 * Return the number of bytes of data available in the circular
1059 * buffer.
1060 */
1061
1062static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
1063{
1064 if (pb != NULL)
1065 return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
1066 else
1067 return 0;
1068}
1069
1070
1071/*
1072 * pl2303_buf_space_avail
1073 *
1074 * Return the number of bytes of space available in the circular
1075 * buffer.
1076 */
1077
1078static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
1079{
1080 if (pb != NULL)
1081 return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
1082 else
1083 return 0;
1084}
1085
1086
1087/*
1088 * pl2303_buf_put
1089 *
1090 * Copy data data from a user buffer and put it into the circular buffer.
1091 * Restrict to the amount of space available.
1092 *
1093 * Return the number of bytes copied.
1094 */
1095
1096static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
1097 unsigned int count)
1098{
1099
1100 unsigned int len;
1101
1102
1103 if (pb == NULL)
1104 return 0;
1105
1106 len = pl2303_buf_space_avail(pb);
1107 if (count > len)
1108 count = len;
1109
1110 if (count == 0)
1111 return 0;
1112
1113 len = pb->buf_buf + pb->buf_size - pb->buf_put;
1114 if (count > len) {
1115 memcpy(pb->buf_put, buf, len);
1116 memcpy(pb->buf_buf, buf+len, count - len);
1117 pb->buf_put = pb->buf_buf + count - len;
1118 } else {
1119 memcpy(pb->buf_put, buf, count);
1120 if (count < len)
1121 pb->buf_put += count;
1122 else /* count == len */
1123 pb->buf_put = pb->buf_buf;
1124 }
1125
1126 return count;
1127
1128}
1129
1130
1131/*
1132 * pl2303_buf_get
1133 *
1134 * Get data from the circular buffer and copy to the given buffer.
1135 * Restrict to the amount of data available.
1136 *
1137 * Return the number of bytes copied.
1138 */
1139
1140static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
1141 unsigned int count)
1142{
1143
1144 unsigned int len;
1145
1146
1147 if (pb == NULL)
1148 return 0;
1149
1150 len = pl2303_buf_data_avail(pb);
1151 if (count > len)
1152 count = len;
1153
1154 if (count == 0)
1155 return 0;
1156
1157 len = pb->buf_buf + pb->buf_size - pb->buf_get;
1158 if (count > len) {
1159 memcpy(buf, pb->buf_get, len);
1160 memcpy(buf+len, pb->buf_buf, count - len);
1161 pb->buf_get = pb->buf_buf + count - len;
1162 } else {
1163 memcpy(buf, pb->buf_get, count);
1164 if (count < len)
1165 pb->buf_get += count;
1166 else /* count == len */
1167 pb->buf_get = pb->buf_buf;
1168 }
1169
1170 return count;
1171
1172}
1173
1174static int __init pl2303_init (void)
1175{
1176 int retval;
1177 retval = usb_serial_register(&pl2303_device);
1178 if (retval)
1179 goto failed_usb_serial_register;
1180 retval = usb_register(&pl2303_driver);
1181 if (retval)
1182 goto failed_usb_register;
17a882fc 1183 info(DRIVER_DESC);
1da177e4
LT		 1184 return 0;
1185failed_usb_register:
1186 usb_serial_deregister(&pl2303_device);
1187failed_usb_serial_register:
1188 return retval;
1189}
1190
1191
1192static void __exit pl2303_exit (void)
1193{
1194 usb_deregister (&pl2303_driver);
1195 usb_serial_deregister (&pl2303_device);
1196}
1197
1198
1199module_init(pl2303_init);
1200module_exit(pl2303_exit);
1201
1202MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4
LT		 1203MODULE_LICENSE("GPL");
1204
1205module_param(debug, bool, S_IRUGO | S_IWUSR);
1206MODULE_PARM_DESC(debug, "Debug enabled or not");
1207
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