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USB: serial: remove unneeded number endpoints settings
[deliverable/linux.git] / drivers / usb / serial / spcp8x5.c
CommitLineData
619a6f1d
GKH		 1/*
2 * spcp8x5 USB to serial adaptor driver
3 *
4 * Copyright (C) 2006 Linxb (xubin.lin@worldplus.com.cn)
5 * Copyright (C) 2006 S1 Corp.
6 *
7 * Original driver for 2.6.10 pl2303 driver by
8 * Greg Kroah-Hartman (greg@kroah.com)
9 * Changes for 2.6.20 by Harald Klein <hari@vt100.at>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 *
17 */
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/module.h>
26#include <linux/spinlock.h>
27#include <linux/usb.h>
28#include <linux/usb/serial.h>
29
30
31/* Version Information */
32#define DRIVER_VERSION "v0.04"
33#define DRIVER_DESC "SPCP8x5 USB to serial adaptor driver"
34
35static int debug;
36
37#define SPCP8x5_007_VID 0x04FC
38#define SPCP8x5_007_PID 0x0201
39#define SPCP8x5_008_VID 0x04fc
40#define SPCP8x5_008_PID 0x0235
41#define SPCP8x5_PHILIPS_VID 0x0471
42#define SPCP8x5_PHILIPS_PID 0x081e
43#define SPCP8x5_INTERMATIC_VID 0x04FC
44#define SPCP8x5_INTERMATIC_PID 0x0204
45#define SPCP8x5_835_VID 0x04fc
46#define SPCP8x5_835_PID 0x0231
47
48static struct usb_device_id id_table [] = {
49 { USB_DEVICE(SPCP8x5_PHILIPS_VID , SPCP8x5_PHILIPS_PID)},
50 { USB_DEVICE(SPCP8x5_INTERMATIC_VID, SPCP8x5_INTERMATIC_PID)},
51 { USB_DEVICE(SPCP8x5_835_VID, SPCP8x5_835_PID)},
52 { USB_DEVICE(SPCP8x5_008_VID, SPCP8x5_008_PID)},
53 { USB_DEVICE(SPCP8x5_007_VID, SPCP8x5_007_PID)},
54 { } /* Terminating entry */
55};
56MODULE_DEVICE_TABLE(usb, id_table);
57
58struct spcp8x5_usb_ctrl_arg {
59 u8 type;
60 u8 cmd;
61 u8 cmd_type;
62 u16 value;
63 u16 index;
64 u16 length;
65};
66
67/* wait 30s before close */
68#define SPCP8x5_CLOSING_WAIT (30*HZ)
69
70#define SPCP8x5_BUF_SIZE 1024
71
72
73/* spcp8x5 spec register define */
74#define MCR_CONTROL_LINE_RTS 0x02
75#define MCR_CONTROL_LINE_DTR 0x01
76#define MCR_DTR 0x01
77#define MCR_RTS 0x02
78
79#define MSR_STATUS_LINE_DCD 0x80
80#define MSR_STATUS_LINE_RI 0x40
81#define MSR_STATUS_LINE_DSR 0x20
82#define MSR_STATUS_LINE_CTS 0x10
83
84/* verdor command here , we should define myself */
85#define SET_DEFAULT 0x40
86#define SET_DEFAULT_TYPE 0x20
87
88#define SET_UART_FORMAT 0x40
89#define SET_UART_FORMAT_TYPE 0x21
90#define SET_UART_FORMAT_SIZE_5 0x00
91#define SET_UART_FORMAT_SIZE_6 0x01
92#define SET_UART_FORMAT_SIZE_7 0x02
93#define SET_UART_FORMAT_SIZE_8 0x03
94#define SET_UART_FORMAT_STOP_1 0x00
95#define SET_UART_FORMAT_STOP_2 0x04
96#define SET_UART_FORMAT_PAR_NONE 0x00
97#define SET_UART_FORMAT_PAR_ODD 0x10
98#define SET_UART_FORMAT_PAR_EVEN 0x30
99#define SET_UART_FORMAT_PAR_MASK 0xD0
100#define SET_UART_FORMAT_PAR_SPACE 0x90
101
102#define GET_UART_STATUS_TYPE 0xc0
103#define GET_UART_STATUS 0x22
104#define GET_UART_STATUS_MSR 0x06
105
106#define SET_UART_STATUS 0x40
107#define SET_UART_STATUS_TYPE 0x23
108#define SET_UART_STATUS_MCR 0x0004
109#define SET_UART_STATUS_MCR_DTR 0x01
110#define SET_UART_STATUS_MCR_RTS 0x02
111#define SET_UART_STATUS_MCR_LOOP 0x10
112
113#define SET_WORKING_MODE 0x40
114#define SET_WORKING_MODE_TYPE 0x24
115#define SET_WORKING_MODE_U2C 0x00
116#define SET_WORKING_MODE_RS485 0x01
117#define SET_WORKING_MODE_PDMA 0x02
118#define SET_WORKING_MODE_SPP 0x03
119
120#define SET_FLOWCTL_CHAR 0x40
121#define SET_FLOWCTL_CHAR_TYPE 0x25
122
123#define GET_VERSION 0xc0
124#define GET_VERSION_TYPE 0x26
125
126#define SET_REGISTER 0x40
127#define SET_REGISTER_TYPE 0x27
128
129#define GET_REGISTER 0xc0
130#define GET_REGISTER_TYPE 0x28
131
132#define SET_RAM 0x40
133#define SET_RAM_TYPE 0x31
134
135#define GET_RAM 0xc0
136#define GET_RAM_TYPE 0x32
137
138/* how come ??? */
139#define UART_STATE 0x08
140#define UART_STATE_TRANSIENT_MASK 0x74
141#define UART_DCD 0x01
142#define UART_DSR 0x02
143#define UART_BREAK_ERROR 0x04
144#define UART_RING 0x08
145#define UART_FRAME_ERROR 0x10
146#define UART_PARITY_ERROR 0x20
147#define UART_OVERRUN_ERROR 0x40
148#define UART_CTS 0x80
149
150enum spcp8x5_type {
151 SPCP825_007_TYPE,
152 SPCP825_008_TYPE,
153 SPCP825_PHILIP_TYPE,
154 SPCP825_INTERMATIC_TYPE,
155 SPCP835_TYPE,
156};
157
158/* 1st in 1st out buffer 4 driver */
159struct ringbuf {
160 unsigned int buf_size;
161 char *buf_buf;
162 char *buf_get;
163 char *buf_put;
164};
165
166/* alloc the ring buf and alloc the buffer itself */
167static inline struct ringbuf *alloc_ringbuf(unsigned int size)
168{
169 struct ringbuf *pb;
170
171 if (size == 0)
172 return NULL;
173
174 pb = kmalloc(sizeof(*pb), GFP_KERNEL);
175 if (pb == NULL)
176 return NULL;
177
178 pb->buf_buf = kmalloc(size, GFP_KERNEL);
179 if (pb->buf_buf == NULL) {
180 kfree(pb);
181 return NULL;
182 }
183
184 pb->buf_size = size;
185 pb->buf_get = pb->buf_put = pb->buf_buf;
186
187 return pb;
188}
189
190/* free the ring buf and the buffer itself */
191static inline void free_ringbuf(struct ringbuf *pb)
192{
193 if (pb != NULL) {
194 kfree(pb->buf_buf);
195 kfree(pb);
196 }
197}
198
199/* clear pipo , juest repoint the pointer here */
200static inline void clear_ringbuf(struct ringbuf *pb)
201{
202 if (pb != NULL)
203 pb->buf_get = pb->buf_put;
204}
205
206/* get the number of data in the pipo */
207static inline unsigned int ringbuf_avail_data(struct ringbuf *pb)
208{
209 if (pb == NULL)
210 return 0;
211 return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
212}
213
214/* get the number of space in the pipo */
215static inline unsigned int ringbuf_avail_space(struct ringbuf *pb)
216{
217 if (pb == NULL)
218 return 0;
219 return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
220}
221
222/* put count data into pipo */
223static unsigned int put_ringbuf(struct ringbuf *pb, const char *buf,
224 unsigned int count)
225{
226 unsigned int len;
227
228 if (pb == NULL)
229 return 0;
230
231 len = ringbuf_avail_space(pb);
232 if (count > len)
233 count = len;
234
235 if (count == 0)
236 return 0;
237
238 len = pb->buf_buf + pb->buf_size - pb->buf_put;
239 if (count > len) {
240 memcpy(pb->buf_put, buf, len);
241 memcpy(pb->buf_buf, buf+len, count - len);
242 pb->buf_put = pb->buf_buf + count - len;
243 } else {
244 memcpy(pb->buf_put, buf, count);
245 if (count < len)
246 pb->buf_put += count;
247 else /* count == len */
248 pb->buf_put = pb->buf_buf;
249 }
250 return count;
251}
252
253/* get count data from pipo */
254static unsigned int get_ringbuf(struct ringbuf *pb, char *buf,
255 unsigned int count)
256{
257 unsigned int len;
258
259 if (pb == NULL || buf == NULL)
260 return 0;
261
262 len = ringbuf_avail_data(pb);
263 if (count > len)
264 count = len;
265
266 if (count == 0)
267 return 0;
268
269 len = pb->buf_buf + pb->buf_size - pb->buf_get;
270 if (count > len) {
271 memcpy(buf, pb->buf_get, len);
272 memcpy(buf+len, pb->buf_buf, count - len);
273 pb->buf_get = pb->buf_buf + count - len;
274 } else {
275 memcpy(buf, pb->buf_get, count);
276 if (count < len)
277 pb->buf_get += count;
278 else /* count == len */
279 pb->buf_get = pb->buf_buf;
280 }
281
282 return count;
283}
284
285static struct usb_driver spcp8x5_driver = {
286 .name = "spcp8x5",
287 .probe = usb_serial_probe,
288 .disconnect = usb_serial_disconnect,
289 .id_table = id_table,
290 .no_dynamic_id = 1,
291};
292
293
294struct spcp8x5_private {
295 spinlock_t lock;
296 struct ringbuf *buf;
297 int write_urb_in_use;
298 enum spcp8x5_type type;
299 wait_queue_head_t delta_msr_wait;
300 u8 line_control;
301 u8 line_status;
302 u8 termios_initialized;
303};
304
305/* desc : when device plug in,this function would be called.
306 * thanks to usb_serial subsystem,then do almost every things for us. And what
307 * we should do just alloc the buffer */
308static int spcp8x5_startup(struct usb_serial *serial)
309{
310 struct spcp8x5_private *priv;
311 int i;
312 enum spcp8x5_type type = SPCP825_007_TYPE;
313
314 if (serial->dev->descriptor.idProduct == 0x0201)
315 type = SPCP825_007_TYPE;
316 else if (serial->dev->descriptor.idProduct == 0x0231)
317 type = SPCP835_TYPE;
318 else if (serial->dev->descriptor.idProduct == 0x0235)
319 type = SPCP825_008_TYPE;
320 else if (serial->dev->descriptor.idProduct == 0x0204)
321 type = SPCP825_INTERMATIC_TYPE;
322 else if (serial->dev->descriptor.idProduct == 0x0471 &&
323 serial->dev->descriptor.idVendor == 0x081e)
324 type = SPCP825_PHILIP_TYPE;
325 dev_dbg(&serial->dev->dev, "device type = %d\n", (int)type);
326
327 for (i = 0; i < serial->num_ports; ++i) {
328 priv = kzalloc(sizeof(struct spcp8x5_private), GFP_KERNEL);
329 if (!priv)
330 goto cleanup;
331
332 spin_lock_init(&priv->lock);
333 priv->buf = alloc_ringbuf(SPCP8x5_BUF_SIZE);
334 if (priv->buf == NULL)
335 goto cleanup2;
336
337 init_waitqueue_head(&priv->delta_msr_wait);
338 priv->type = type;
339 usb_set_serial_port_data(serial->port[i] , priv);
340
341 }
342
343 return 0;
344
345cleanup2:
346 kfree(priv);
347cleanup:
348 for (--i; i >= 0; --i) {
349 priv = usb_get_serial_port_data(serial->port[i]);
350 free_ringbuf(priv->buf);
351 kfree(priv);
352 usb_set_serial_port_data(serial->port[i] , NULL);
353 }
354 return -ENOMEM;
355}
356
357/* call when the device plug out. free all the memory alloced by probe */
358static void spcp8x5_shutdown(struct usb_serial *serial)
359{
360 int i;
361 struct spcp8x5_private *priv;
362
363 for (i = 0; i < serial->num_ports; i++) {
364 priv = usb_get_serial_port_data(serial->port[i]);
365 if (priv) {
366 free_ringbuf(priv->buf);
367 kfree(priv);
368 usb_set_serial_port_data(serial->port[i] , NULL);
369 }
370 }
371}
372
373/* set the modem control line of the device.
374 * NOTE spcp825-007 not supported this */
375static int spcp8x5_set_ctrlLine(struct usb_device *dev, u8 value,
376 enum spcp8x5_type type)
377{
378 int retval;
379 u8 mcr = 0 ;
380
381 if (type == SPCP825_007_TYPE)
382 return -EPERM;
383
384 mcr = (unsigned short)value;
385 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
386 SET_UART_STATUS_TYPE, SET_UART_STATUS,
387 mcr, 0x04, NULL, 0, 100);
388 if (retval != 0)
389 dev_dbg(&dev->dev, "usb_control_msg return %#x\n", retval);
390 return retval;
391}
392
393/* get the modem status register of the device
394 * NOTE spcp825-007 not supported this */
395static int spcp8x5_get_msr(struct usb_device *dev, u8 *status,
396 enum spcp8x5_type type)
397{
398 u8 *status_buffer;
399 int ret;
400
401 /* I return Permited not support here but seem inval device
402 * is more fix */
403 if (type == SPCP825_007_TYPE)
404 return -EPERM;
405 if (status == NULL)
406 return -EINVAL;
407
408 status_buffer = kmalloc(1, GFP_KERNEL);
409 if (!status_buffer)
410 return -ENOMEM;
411 status_buffer[0] = status[0];
412
413 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
414 GET_UART_STATUS, GET_UART_STATUS_TYPE,
415 0, GET_UART_STATUS_MSR, status_buffer, 1, 100);
416 if (ret < 0)
417 dev_dbg(&dev->dev, "Get MSR = 0x%p failed (error = %d)",
418 status_buffer, ret);
419
420 dev_dbg(&dev->dev, "0xc0:0x22:0:6 %d - 0x%p ", ret, status_buffer);
421 status[0] = status_buffer[0];
422 kfree(status_buffer);
423
424 return ret;
425}
426
427/* select the work mode.
428 * NOTE this function not supported by spcp825-007 */
429static void spcp8x5_set_workMode(struct usb_device *dev, u16 value,
430 u16 index, enum spcp8x5_type type)
431{
432 int ret;
433
434 /* I return Permited not support here but seem inval device
435 * is more fix */
436 if (type == SPCP825_007_TYPE)
437 return;
438
439 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
440 SET_WORKING_MODE_TYPE, SET_WORKING_MODE,
441 value, index, NULL, 0, 100);
442 dev_dbg(&dev->dev, "value = %#x , index = %#x\n", value, index);
443 if (ret < 0)
444 dev_dbg(&dev->dev,
445 "RTSCTS usb_control_msg(enable flowctrl) = %d\n", ret);
446}
447
448/* close the serial port. We should wait for data sending to device 1st and
449 * then kill all urb. */
450static void spcp8x5_close(struct usb_serial_port *port, struct file *filp)
451{
452 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
453 unsigned long flags;
454 unsigned int c_cflag;
455 int bps;
456 long timeout;
457 wait_queue_t wait;
458 int result;
459
460 dbg("%s - port %d", __func__, port->number);
461
462 /* wait for data to drain from the buffer */
463 spin_lock_irqsave(&priv->lock, flags);
464 timeout = SPCP8x5_CLOSING_WAIT;
465 init_waitqueue_entry(&wait, current);
466 add_wait_queue(&port->tty->write_wait, &wait);
467 for (;;) {
468 set_current_state(TASK_INTERRUPTIBLE);
469 if (ringbuf_avail_data(priv->buf) == 0 ||
470 timeout == 0 || signal_pending(current))
471 break;
472 spin_unlock_irqrestore(&priv->lock, flags);
473 timeout = schedule_timeout(timeout);
474 spin_lock_irqsave(&priv->lock, flags);
475 }
476 set_current_state(TASK_RUNNING);
477 remove_wait_queue(&port->tty->write_wait, &wait);
478
479 /* clear out any remaining data in the buffer */
480 clear_ringbuf(priv->buf);
481 spin_unlock_irqrestore(&priv->lock, flags);
482
483 /* wait for characters to drain from the device (this is long enough
484 * for the entire all byte spcp8x5 hardware buffer to drain with no
485 * flow control for data rates of 1200 bps or more, for lower rates we
486 * should really know how much data is in the buffer to compute a delay
487 * that is not unnecessarily long) */
488 bps = tty_get_baud_rate(port->tty);
489 if (bps > 1200)
490 timeout = max((HZ*2560) / bps, HZ/10);
491 else
492 timeout = 2*HZ;
493 set_current_state(TASK_INTERRUPTIBLE);
494 schedule_timeout(timeout);
495
496 /* clear control lines */
497 if (port->tty) {
498 c_cflag = port->tty->termios->c_cflag;
499 if (c_cflag & HUPCL) {
500 spin_lock_irqsave(&priv->lock, flags);
501 priv->line_control = 0;
502 spin_unlock_irqrestore(&priv->lock, flags);
503 spcp8x5_set_ctrlLine(port->serial->dev, 0 , priv->type);
504 }
505 }
506
507 /* kill urb */
508 if (port->write_urb != NULL) {
509 result = usb_unlink_urb(port->write_urb);
510 if (result)
511 dev_dbg(&port->dev,
512 "usb_unlink_urb(write_urb) = %d\n", result);
513 }
514 result = usb_unlink_urb(port->read_urb);
515 if (result)
516 dev_dbg(&port->dev, "usb_unlink_urb(read_urb) = %d\n", result);
517}
518
519/* set the serial param for transfer. we should check if we really need to
520 * transfer. then if be set flow contorl we should do this too. */
521static void spcp8x5_set_termios(struct usb_serial_port *port,
522 struct ktermios *old_termios)
523{
524 struct usb_serial *serial = port->serial;
525 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
526 unsigned long flags;
527 unsigned int cflag = port->tty->termios->c_cflag;
528 unsigned int old_cflag = old_termios->c_cflag;
529 unsigned short uartdata;
530 unsigned char buf[2] = {0, 0};
531 int baud;
532 int i;
533 u8 control;
534
535 if ((!port->tty) || (!port->tty->termios))
536 return;
537
538 /* for the 1st time call this function */
539 spin_lock_irqsave(&priv->lock, flags);
540 if (!priv->termios_initialized) {
541 *(port->tty->termios) = tty_std_termios;
542 port->tty->termios->c_cflag = B115200 | CS8 | CREAD |
543 HUPCL | CLOCAL;
544 priv->termios_initialized = 1;
545 }
546 spin_unlock_irqrestore(&priv->lock, flags);
547
548 /* check that they really want us to change something */
549 if (!tty_termios_hw_change(port->tty->termios, old_termios))
550 return;
551
552 /* set DTR/RTS active */
553 spin_lock_irqsave(&priv->lock, flags);
554 control = priv->line_control;
555 if ((old_cflag & CBAUD) == B0) {
556 priv->line_control |= MCR_DTR;
557 if (!(old_cflag & CRTSCTS))
558 priv->line_control |= MCR_RTS;
559 }
560 if (control != priv->line_control) {
561 control = priv->line_control;
562 spin_unlock_irqrestore(&priv->lock, flags);
563 spcp8x5_set_ctrlLine(serial->dev, control , priv->type);
564 } else {
565 spin_unlock_irqrestore(&priv->lock, flags);
566 }
567
568 /* Set Baud Rate */
569 baud = tty_get_baud_rate(port->tty);;
570 switch (baud) {
571 case 300: buf[0] = 0x00; break;
572 case 600: buf[0] = 0x01; break;
573 case 1200: buf[0] = 0x02; break;
574 case 2400: buf[0] = 0x03; break;
575 case 4800: buf[0] = 0x04; break;
576 case 9600: buf[0] = 0x05; break;
577 case 19200: buf[0] = 0x07; break;
578 case 38400: buf[0] = 0x09; break;
579 case 57600: buf[0] = 0x0a; break;
580 case 115200: buf[0] = 0x0b; break;
581 case 230400: buf[0] = 0x0c; break;
582 case 460800: buf[0] = 0x0d; break;
583 case 921600: buf[0] = 0x0e; break;
584/* case 1200000: buf[0] = 0x0f; break; */
585/* case 2400000: buf[0] = 0x10; break; */
586 case 3000000: buf[0] = 0x11; break;
587/* case 6000000: buf[0] = 0x12; break; */
588 case 0:
589 case 1000000:
590 buf[0] = 0x0b; break;
591 default:
592 err("spcp825 driver does not support the baudrate "
593 "requested, using default of 9600.");
594 }
595
596 /* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
597 if (cflag & CSIZE) {
598 switch (cflag & CSIZE) {
599 case CS5:
600 buf[1] |= SET_UART_FORMAT_SIZE_5;
601 break;
602 case CS6:
603 buf[1] |= SET_UART_FORMAT_SIZE_6;
604 break;
605 case CS7:
606 buf[1] |= SET_UART_FORMAT_SIZE_7;
607 break;
608 default:
609 case CS8:
610 buf[1] |= SET_UART_FORMAT_SIZE_8;
611 break;
612 }
613 }
614
615 /* Set Stop bit2 : 0:1bit 1:2bit */
616 buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 :
617 SET_UART_FORMAT_STOP_1;
618
619 /* Set Parity bit3-4 01:Odd 11:Even */
620 if (cflag & PARENB) {
621 buf[1] |= (cflag & PARODD) ?
622 SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ;
623 } else
624 buf[1] |= SET_UART_FORMAT_PAR_NONE;
625
626 uartdata = buf[0] | buf[1]<<8;
627
628 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
629 SET_UART_FORMAT_TYPE, SET_UART_FORMAT,
630 uartdata, 0, NULL, 0, 100);
631 if (i < 0)
632 err("Set UART format %#x failed (error = %d)", uartdata, i);
633 dbg("0x21:0x40:0:0 %d\n", i);
634
635 if (cflag & CRTSCTS) {
636 /* enable hardware flow control */
637 spcp8x5_set_workMode(serial->dev, 0x000a,
638 SET_WORKING_MODE_U2C, priv->type);
639 }
640 return;
641}
642
643/* open the serial port. do some usb system call. set termios and get the line
644 * status of the device. then submit the read urb */
645static int spcp8x5_open(struct usb_serial_port *port, struct file *filp)
646{
647 struct ktermios tmp_termios;
648 struct usb_serial *serial = port->serial;
649 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
650 int ret;
651 unsigned long flags;
652 u8 status = 0x30;
653 /* status 0x30 means DSR and CTS = 1 other CDC RI and delta = 0 */
654
655 dbg("%s - port %d", __func__, port->number);
656
657 usb_clear_halt(serial->dev, port->write_urb->pipe);
658 usb_clear_halt(serial->dev, port->read_urb->pipe);
659
660 ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
661 0x09, 0x00,
662 0x01, 0x00, NULL, 0x00, 100);
663 if (ret)
664 return ret;
665
666 spin_lock_irqsave(&priv->lock, flags);
667 if (port->tty->termios->c_cflag & CBAUD)
668 priv->line_control = MCR_DTR | MCR_RTS;
669 else
670 priv->line_control = 0;
671 spin_unlock_irqrestore(&priv->lock, flags);
672
673 spcp8x5_set_ctrlLine(serial->dev, priv->line_control , priv->type);
674
675 /* Setup termios */
676 if (port->tty)
677 spcp8x5_set_termios(port, &tmp_termios);
678
679 spcp8x5_get_msr(serial->dev, &status, priv->type);
680
681 /* may be we should update uart status here but now we did not do */
682 spin_lock_irqsave(&priv->lock, flags);
683 priv->line_status = status & 0xf0 ;
684 spin_unlock_irqrestore(&priv->lock, flags);
685
686 /* FIXME: need to assert RTS and DTR if CRTSCTS off */
687
688 dbg("%s - submitting read urb", __func__);
689 port->read_urb->dev = serial->dev;
690 ret = usb_submit_urb(port->read_urb, GFP_KERNEL);
691 if (ret) {
692 spcp8x5_close(port, NULL);
693 return -EPROTO;
694 }
695 return 0;
696}
697
698/* bulk read call back function. check the status of the urb. if transfer
699 * failed return. then update the status and the tty send data to tty subsys.
700 * submit urb again.
701 */
702static void spcp8x5_read_bulk_callback(struct urb *urb)
703{
704 struct usb_serial_port *port = urb->context;
705 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
706 struct tty_struct *tty;
707 unsigned char *data = urb->transfer_buffer;
708 unsigned long flags;
709 int i;
710 int result;
711 u8 status = 0;
712 char tty_flag;
713
714 dev_dbg(&port->dev, "start, urb->status = %d, "
715 "urb->actual_length = %d\n,", urb->status, urb->actual_length);
716
717 /* check the urb status */
718 if (urb->status) {
719 if (!port->open_count)
720 return;
721 if (urb->status == -EPROTO) {
722 /* spcp8x5 mysteriously fails with -EPROTO */
723 /* reschedule the read */
724 urb->status = 0;
725 urb->dev = port->serial->dev;
726 result = usb_submit_urb(urb , GFP_ATOMIC);
727 if (result)
728 dev_dbg(&port->dev,
729 "failed submitting read urb %d\n",
730 result);
731 return;
732 }
733 dev_dbg(&port->dev, "unable to handle the error, exiting.\n");
734 return;
735 }
736
737 /* get tty_flag from status */
738 tty_flag = TTY_NORMAL;
739
740 spin_lock_irqsave(&priv->lock, flags);
741 status = priv->line_status;
742 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
743 spin_unlock_irqrestore(&priv->lock, flags);
744 /* wake up the wait for termios */
745 wake_up_interruptible(&priv->delta_msr_wait);
746
747 /* break takes precedence over parity, which takes precedence over
748 * framing errors */
749 if (status & UART_BREAK_ERROR)
750 tty_flag = TTY_BREAK;
751 else if (status & UART_PARITY_ERROR)
752 tty_flag = TTY_PARITY;
753 else if (status & UART_FRAME_ERROR)
754 tty_flag = TTY_FRAME;
755 dev_dbg(&port->dev, "tty_flag = %d\n", tty_flag);
756
757 tty = port->tty;
758 if (tty && urb->actual_length) {
759 tty_buffer_request_room(tty, urb->actual_length + 1);
760 /* overrun is special, not associated with a char */
761 if (status & UART_OVERRUN_ERROR)
762 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
763 for (i = 0; i < urb->actual_length; ++i)
764 tty_insert_flip_char(tty, data[i], tty_flag);
765 tty_flip_buffer_push(tty);
766 }
767
768 /* Schedule the next read _if_ we are still open */
769 if (port->open_count) {
770 urb->dev = port->serial->dev;
771 result = usb_submit_urb(urb , GFP_ATOMIC);
772 if (result)
773 dev_dbg(&port->dev, "failed submitting read urb %d\n",
774 result);
775 }
776
777 return;
778}
779
780/* get data from ring buffer and then write to usb bus */
781static void spcp8x5_send(struct usb_serial_port *port)
782{
783 int count, result;
784 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
785 unsigned long flags;
786
787 spin_lock_irqsave(&priv->lock, flags);
788
789 if (priv->write_urb_in_use) {
790 dev_dbg(&port->dev, "write urb still used\n");
791 spin_unlock_irqrestore(&priv->lock, flags);
792 return;
793 }
794
795 /* send the 1st urb for writting */
796 memset(port->write_urb->transfer_buffer , 0x00 , port->bulk_out_size);
797 count = get_ringbuf(priv->buf, port->write_urb->transfer_buffer,
798 port->bulk_out_size);
799
800 if (count == 0) {
801 spin_unlock_irqrestore(&priv->lock, flags);
802 return;
803 }
804
805 /* update the urb status */
806 priv->write_urb_in_use = 1;
807
808 spin_unlock_irqrestore(&priv->lock, flags);
809
810 port->write_urb->transfer_buffer_length = count;
811 port->write_urb->dev = port->serial->dev;
812
813 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
814 if (result) {
815 dev_dbg(&port->dev, "failed submitting write urb, error %d\n",
816 result);
817 priv->write_urb_in_use = 0;
818 /* TODO: reschedule spcp8x5_send */
819 }
820
821
822 schedule_work(&port->work);
823}
824
825/* this is the call back function for write urb. NOTE we should not sleep in
826 * this routine. check the urb return code and then submit the write urb again
827 * to hold the write loop */
828static void spcp8x5_write_bulk_callback(struct urb *urb)
829{
830 struct usb_serial_port *port = urb->context;
831 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
832 int result;
833
834 switch (urb->status) {
835 case 0:
836 /* success */
837 break;
838 case -ECONNRESET:
839 case -ENOENT:
840 case -ESHUTDOWN:
841 /* this urb is terminated, clean up */
842 dev_dbg(&port->dev, "urb shutting down with status: %d\n",
843 urb->status);
844 priv->write_urb_in_use = 0;
845 return;
846 default:
847 /* error in the urb, so we have to resubmit it */
848 dbg("%s - Overflow in write", __func__);
849 dbg("%s - nonzero write bulk status received: %d",
850 __func__, urb->status);
851 port->write_urb->transfer_buffer_length = 1;
852 port->write_urb->dev = port->serial->dev;
853 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
854 if (result)
855 dev_dbg(&port->dev,
856 "failed resubmitting write urb %d\n", result);
857 else
858 return;
859 }
860
861 priv->write_urb_in_use = 0;
862
863 /* send any buffered data */
864 spcp8x5_send(port);
865}
866
867/* write data to ring buffer. and then start the write transfer */
868static int spcp8x5_write(struct usb_serial_port *port,
869 const unsigned char *buf, int count)
870{
871 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
872 unsigned long flags;
873
874 dev_dbg(&port->dev, "%d bytes\n", count);
875
876 if (!count)
877 return count;
878
879 spin_lock_irqsave(&priv->lock, flags);
880 count = put_ringbuf(priv->buf, buf, count);
881 spin_unlock_irqrestore(&priv->lock, flags);
882
883 spcp8x5_send(port);
884
885 return count;
886}
887
888static int spcp8x5_wait_modem_info(struct usb_serial_port *port,
889 unsigned int arg)
890{
891 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
892 unsigned long flags;
893 unsigned int prevstatus;
894 unsigned int status;
895 unsigned int changed;
896
897 spin_lock_irqsave(&priv->lock, flags);
898 prevstatus = priv->line_status;
899 spin_unlock_irqrestore(&priv->lock, flags);
900
901 while (1) {
902 /* wake up in bulk read */
903 interruptible_sleep_on(&priv->delta_msr_wait);
904
905 /* see if a signal did it */
906 if (signal_pending(current))
907 return -ERESTARTSYS;
908
909 spin_lock_irqsave(&priv->lock, flags);
910 status = priv->line_status;
911 spin_unlock_irqrestore(&priv->lock, flags);
912
913 changed = prevstatus^status;
914
915 if (((arg & TIOCM_RNG) && (changed & MSR_STATUS_LINE_RI)) ||
916 ((arg & TIOCM_DSR) && (changed & MSR_STATUS_LINE_DSR)) ||
917 ((arg & TIOCM_CD) && (changed & MSR_STATUS_LINE_DCD)) ||
918 ((arg & TIOCM_CTS) && (changed & MSR_STATUS_LINE_CTS)))
919 return 0;
920
921 prevstatus = status;
922 }
923 /* NOTREACHED */
924 return 0;
925}
926
927static int spcp8x5_ioctl(struct usb_serial_port *port, struct file *file,
928 unsigned int cmd, unsigned long arg)
929{
930 dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
931
932 switch (cmd) {
933 case TIOCMIWAIT:
934 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
935 return spcp8x5_wait_modem_info(port, arg);
936
937 default:
938 dbg("%s not supported = 0x%04x", __func__, cmd);
939 break;
940 }
941
942 return -ENOIOCTLCMD;
943}
944
945static int spcp8x5_tiocmset(struct usb_serial_port *port, struct file *file,
946 unsigned int set, unsigned int clear)
947{
948 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
949 unsigned long flags;
950 u8 control;
951
952 spin_lock_irqsave(&priv->lock, flags);
953 if (set & TIOCM_RTS)
954 priv->line_control |= MCR_RTS;
955 if (set & TIOCM_DTR)
956 priv->line_control |= MCR_DTR;
957 if (clear & TIOCM_RTS)
958 priv->line_control &= ~MCR_RTS;
959 if (clear & TIOCM_DTR)
960 priv->line_control &= ~MCR_DTR;
961 control = priv->line_control;
962 spin_unlock_irqrestore(&priv->lock, flags);
963
964 return spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
965}
966
967static int spcp8x5_tiocmget(struct usb_serial_port *port, struct file *file)
968{
969 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
970 unsigned long flags;
971 unsigned int mcr;
972 unsigned int status;
973 unsigned int result;
974
975 spin_lock_irqsave(&priv->lock, flags);
976 mcr = priv->line_control;
977 status = priv->line_status;
978 spin_unlock_irqrestore(&priv->lock, flags);
979
980 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
981 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
982 | ((status & MSR_STATUS_LINE_CTS) ? TIOCM_CTS : 0)
983 | ((status & MSR_STATUS_LINE_DSR) ? TIOCM_DSR : 0)
984 | ((status & MSR_STATUS_LINE_RI) ? TIOCM_RI : 0)
985 | ((status & MSR_STATUS_LINE_DCD) ? TIOCM_CD : 0);
986
987 return result;
988}
989
990/* get the avail space room in ring buffer */
991static int spcp8x5_write_room(struct usb_serial_port *port)
992{
993 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
994 int room = 0;
995 unsigned long flags;
996
997 spin_lock_irqsave(&priv->lock, flags);
998 room = ringbuf_avail_space(priv->buf);
999 spin_unlock_irqrestore(&priv->lock, flags);
1000
1001 return room;
1002}
1003
1004/* get the number of avail data in write ring buffer */
1005static int spcp8x5_chars_in_buffer(struct usb_serial_port *port)
1006{
1007 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
1008 int chars = 0;
1009 unsigned long flags;
1010
1011 spin_lock_irqsave(&priv->lock, flags);
1012 chars = ringbuf_avail_data(priv->buf);
1013 spin_unlock_irqrestore(&priv->lock, flags);
1014
1015 return chars;
1016}
1017
1018/* All of the device info needed for the spcp8x5 SIO serial converter */
1019static struct usb_serial_driver spcp8x5_device = {
1020 .driver = {
1021 .owner = THIS_MODULE,
1022 .name = "SPCP8x5",
1023 },
1024 .id_table = id_table,
619a6f1d
GKH		 1025 .num_ports = 1,
1026 .open = spcp8x5_open,
1027 .close = spcp8x5_close,
1028 .write = spcp8x5_write,
1029 .set_termios = spcp8x5_set_termios,
1030 .ioctl = spcp8x5_ioctl,
1031 .tiocmget = spcp8x5_tiocmget,
1032 .tiocmset = spcp8x5_tiocmset,
1033 .write_room = spcp8x5_write_room,
1034 .read_bulk_callback = spcp8x5_read_bulk_callback,
1035 .write_bulk_callback = spcp8x5_write_bulk_callback,
1036 .chars_in_buffer = spcp8x5_chars_in_buffer,
1037 .attach = spcp8x5_startup,
1038 .shutdown = spcp8x5_shutdown,
1039};
1040
1041static int __init spcp8x5_init(void)
1042{
1043 int retval;
1044 retval = usb_serial_register(&spcp8x5_device);
1045 if (retval)
1046 goto failed_usb_serial_register;
1047 retval = usb_register(&spcp8x5_driver);
1048 if (retval)
1049 goto failed_usb_register;
1050 info(DRIVER_DESC " " DRIVER_VERSION);
1051 return 0;
1052failed_usb_register:
1053 usb_serial_deregister(&spcp8x5_device);
1054failed_usb_serial_register:
1055 return retval;
1056}
1057
1058static void __exit spcp8x5_exit(void)
1059{
1060 usb_deregister(&spcp8x5_driver);
1061 usb_serial_deregister(&spcp8x5_device);
1062}
1063
1064module_init(spcp8x5_init);
1065module_exit(spcp8x5_exit);
1066
1067MODULE_DESCRIPTION(DRIVER_DESC);
1068MODULE_VERSION(DRIVER_VERSION);
1069MODULE_LICENSE("GPL");
1070
1071module_param(debug, bool, S_IRUGO | S_IWUSR);
1072MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux kernel - Deliverables
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