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Merge branch 'next-s3c' of git://aeryn.fluff.org.uk/bjdooks/linux into devel
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / serial / spcp8x5.c
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
35 static 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
48 static 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 };
56 MODULE_DEVICE_TABLE(usb, id_table);
57
58 struct 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
150 enum 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 */
159 struct 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 */
167 static 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 */
191 static 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 */
200 static 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 */
207 static 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 */
215 static 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 */
223 static 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 */
254 static 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
285 static 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
294 struct 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 */
308 static 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 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
314
315 if (product == 0x0201)
316 type = SPCP825_007_TYPE;
317 else if (product == 0x0231)
318 type = SPCP835_TYPE;
319 else if (product == 0x0235)
320 type = SPCP825_008_TYPE;
321 else if (product == 0x0204)
322 type = SPCP825_INTERMATIC_TYPE;
323 else if (product == 0x0471 &&
324 serial->dev->descriptor.idVendor == cpu_to_le16(0x081e))
325 type = SPCP825_PHILIP_TYPE;
326 dev_dbg(&serial->dev->dev, "device type = %d\n", (int)type);
327
328 for (i = 0; i < serial->num_ports; ++i) {
329 priv = kzalloc(sizeof(struct spcp8x5_private), GFP_KERNEL);
330 if (!priv)
331 goto cleanup;
332
333 spin_lock_init(&priv->lock);
334 priv->buf = alloc_ringbuf(SPCP8x5_BUF_SIZE);
335 if (priv->buf == NULL)
336 goto cleanup2;
337
338 init_waitqueue_head(&priv->delta_msr_wait);
339 priv->type = type;
340 usb_set_serial_port_data(serial->port[i] , priv);
341
342 }
343
344 return 0;
345
346 cleanup2:
347 kfree(priv);
348 cleanup:
349 for (--i; i >= 0; --i) {
350 priv = usb_get_serial_port_data(serial->port[i]);
351 free_ringbuf(priv->buf);
352 kfree(priv);
353 usb_set_serial_port_data(serial->port[i] , NULL);
354 }
355 return -ENOMEM;
356 }
357
358 /* call when the device plug out. free all the memory alloced by probe */
359 static void spcp8x5_release(struct usb_serial *serial)
360 {
361 int i;
362 struct spcp8x5_private *priv;
363
364 for (i = 0; i < serial->num_ports; i++) {
365 priv = usb_get_serial_port_data(serial->port[i]);
366 if (priv) {
367 free_ringbuf(priv->buf);
368 kfree(priv);
369 }
370 }
371 }
372
373 /* set the modem control line of the device.
374 * NOTE spcp825-007 not supported this */
375 static 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 */
395 static 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 */
429 static 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 static int spcp8x5_carrier_raised(struct usb_serial_port *port)
449 {
450 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
451 if (priv->line_status & MSR_STATUS_LINE_DCD)
452 return 1;
453 return 0;
454 }
455
456 static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on)
457 {
458 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
459 unsigned long flags;
460 u8 control;
461
462 spin_lock_irqsave(&priv->lock, flags);
463 if (on)
464 priv->line_control = MCR_CONTROL_LINE_DTR
465 | MCR_CONTROL_LINE_RTS;
466 else
467 priv->line_control &= ~ (MCR_CONTROL_LINE_DTR
468 | MCR_CONTROL_LINE_RTS);
469 control = priv->line_control;
470 spin_unlock_irqrestore(&priv->lock, flags);
471 spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
472 }
473
474 /* close the serial port. We should wait for data sending to device 1st and
475 * then kill all urb. */
476 static void spcp8x5_close(struct usb_serial_port *port)
477 {
478 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
479 unsigned long flags;
480 int result;
481
482 dbg("%s - port %d", __func__, port->number);
483
484 spin_lock_irqsave(&priv->lock, flags);
485 /* clear out any remaining data in the buffer */
486 clear_ringbuf(priv->buf);
487 spin_unlock_irqrestore(&priv->lock, flags);
488
489 /* kill urb */
490 if (port->write_urb != NULL) {
491 result = usb_unlink_urb(port->write_urb);
492 if (result)
493 dev_dbg(&port->dev,
494 "usb_unlink_urb(write_urb) = %d\n", result);
495 }
496 result = usb_unlink_urb(port->read_urb);
497 if (result)
498 dev_dbg(&port->dev, "usb_unlink_urb(read_urb) = %d\n", result);
499 }
500
501 /* set the serial param for transfer. we should check if we really need to
502 * transfer. if we set flow control we should do this too. */
503 static void spcp8x5_set_termios(struct tty_struct *tty,
504 struct usb_serial_port *port, struct ktermios *old_termios)
505 {
506 struct usb_serial *serial = port->serial;
507 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
508 unsigned long flags;
509 unsigned int cflag = tty->termios->c_cflag;
510 unsigned int old_cflag = old_termios->c_cflag;
511 unsigned short uartdata;
512 unsigned char buf[2] = {0, 0};
513 int baud;
514 int i;
515 u8 control;
516
517 /* for the 1st time call this function */
518 spin_lock_irqsave(&priv->lock, flags);
519 if (!priv->termios_initialized) {
520 *(tty->termios) = tty_std_termios;
521 tty->termios->c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
522 tty->termios->c_ispeed = 115200;
523 tty->termios->c_ospeed = 115200;
524 priv->termios_initialized = 1;
525 }
526 spin_unlock_irqrestore(&priv->lock, flags);
527
528 /* check that they really want us to change something */
529 if (!tty_termios_hw_change(tty->termios, old_termios))
530 return;
531
532 /* set DTR/RTS active */
533 spin_lock_irqsave(&priv->lock, flags);
534 control = priv->line_control;
535 if ((old_cflag & CBAUD) == B0) {
536 priv->line_control |= MCR_DTR;
537 if (!(old_cflag & CRTSCTS))
538 priv->line_control |= MCR_RTS;
539 }
540 if (control != priv->line_control) {
541 control = priv->line_control;
542 spin_unlock_irqrestore(&priv->lock, flags);
543 spcp8x5_set_ctrlLine(serial->dev, control , priv->type);
544 } else {
545 spin_unlock_irqrestore(&priv->lock, flags);
546 }
547
548 /* Set Baud Rate */
549 baud = tty_get_baud_rate(tty);;
550 switch (baud) {
551 case 300: buf[0] = 0x00; break;
552 case 600: buf[0] = 0x01; break;
553 case 1200: buf[0] = 0x02; break;
554 case 2400: buf[0] = 0x03; break;
555 case 4800: buf[0] = 0x04; break;
556 case 9600: buf[0] = 0x05; break;
557 case 19200: buf[0] = 0x07; break;
558 case 38400: buf[0] = 0x09; break;
559 case 57600: buf[0] = 0x0a; break;
560 case 115200: buf[0] = 0x0b; break;
561 case 230400: buf[0] = 0x0c; break;
562 case 460800: buf[0] = 0x0d; break;
563 case 921600: buf[0] = 0x0e; break;
564 /* case 1200000: buf[0] = 0x0f; break; */
565 /* case 2400000: buf[0] = 0x10; break; */
566 case 3000000: buf[0] = 0x11; break;
567 /* case 6000000: buf[0] = 0x12; break; */
568 case 0:
569 case 1000000:
570 buf[0] = 0x0b; break;
571 default:
572 dev_err(&port->dev, "spcp825 driver does not support the "
573 "baudrate requested, using default of 9600.\n");
574 }
575
576 /* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
577 if (cflag & CSIZE) {
578 switch (cflag & CSIZE) {
579 case CS5:
580 buf[1] |= SET_UART_FORMAT_SIZE_5;
581 break;
582 case CS6:
583 buf[1] |= SET_UART_FORMAT_SIZE_6;
584 break;
585 case CS7:
586 buf[1] |= SET_UART_FORMAT_SIZE_7;
587 break;
588 default:
589 case CS8:
590 buf[1] |= SET_UART_FORMAT_SIZE_8;
591 break;
592 }
593 }
594
595 /* Set Stop bit2 : 0:1bit 1:2bit */
596 buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 :
597 SET_UART_FORMAT_STOP_1;
598
599 /* Set Parity bit3-4 01:Odd 11:Even */
600 if (cflag & PARENB) {
601 buf[1] |= (cflag & PARODD) ?
602 SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ;
603 } else
604 buf[1] |= SET_UART_FORMAT_PAR_NONE;
605
606 uartdata = buf[0] | buf[1]<<8;
607
608 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
609 SET_UART_FORMAT_TYPE, SET_UART_FORMAT,
610 uartdata, 0, NULL, 0, 100);
611 if (i < 0)
612 dev_err(&port->dev, "Set UART format %#x failed (error = %d)\n",
613 uartdata, i);
614 dbg("0x21:0x40:0:0 %d\n", i);
615
616 if (cflag & CRTSCTS) {
617 /* enable hardware flow control */
618 spcp8x5_set_workMode(serial->dev, 0x000a,
619 SET_WORKING_MODE_U2C, priv->type);
620 }
621 return;
622 }
623
624 /* open the serial port. do some usb system call. set termios and get the line
625 * status of the device. then submit the read urb */
626 static int spcp8x5_open(struct tty_struct *tty,
627 struct usb_serial_port *port, struct file *filp)
628 {
629 struct ktermios tmp_termios;
630 struct usb_serial *serial = port->serial;
631 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
632 int ret;
633 unsigned long flags;
634 u8 status = 0x30;
635 /* status 0x30 means DSR and CTS = 1 other CDC RI and delta = 0 */
636
637 dbg("%s - port %d", __func__, port->number);
638
639 usb_clear_halt(serial->dev, port->write_urb->pipe);
640 usb_clear_halt(serial->dev, port->read_urb->pipe);
641
642 ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
643 0x09, 0x00,
644 0x01, 0x00, NULL, 0x00, 100);
645 if (ret)
646 return ret;
647
648 spcp8x5_set_ctrlLine(serial->dev, priv->line_control , priv->type);
649
650 /* Setup termios */
651 if (tty)
652 spcp8x5_set_termios(tty, port, &tmp_termios);
653
654 spcp8x5_get_msr(serial->dev, &status, priv->type);
655
656 /* may be we should update uart status here but now we did not do */
657 spin_lock_irqsave(&priv->lock, flags);
658 priv->line_status = status & 0xf0 ;
659 spin_unlock_irqrestore(&priv->lock, flags);
660
661 /* FIXME: need to assert RTS and DTR if CRTSCTS off */
662
663 dbg("%s - submitting read urb", __func__);
664 port->read_urb->dev = serial->dev;
665 ret = usb_submit_urb(port->read_urb, GFP_KERNEL);
666 if (ret) {
667 spcp8x5_close(port);
668 return -EPROTO;
669 }
670 port->port.drain_delay = 256;
671 return 0;
672 }
673
674 /* bulk read call back function. check the status of the urb. if transfer
675 * failed return. then update the status and the tty send data to tty subsys.
676 * submit urb again.
677 */
678 static void spcp8x5_read_bulk_callback(struct urb *urb)
679 {
680 struct usb_serial_port *port = urb->context;
681 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
682 struct tty_struct *tty;
683 unsigned char *data = urb->transfer_buffer;
684 unsigned long flags;
685 int i;
686 int result = urb->status;
687 u8 status;
688 char tty_flag;
689
690 dev_dbg(&port->dev, "start, result = %d, urb->actual_length = %d\n,",
691 result, urb->actual_length);
692
693 /* check the urb status */
694 if (result) {
695 if (!port->port.count)
696 return;
697 if (result == -EPROTO) {
698 /* spcp8x5 mysteriously fails with -EPROTO */
699 /* reschedule the read */
700 urb->dev = port->serial->dev;
701 result = usb_submit_urb(urb , GFP_ATOMIC);
702 if (result)
703 dev_dbg(&port->dev,
704 "failed submitting read urb %d\n",
705 result);
706 return;
707 }
708 dev_dbg(&port->dev, "unable to handle the error, exiting.\n");
709 return;
710 }
711
712 /* get tty_flag from status */
713 tty_flag = TTY_NORMAL;
714
715 spin_lock_irqsave(&priv->lock, flags);
716 status = priv->line_status;
717 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
718 spin_unlock_irqrestore(&priv->lock, flags);
719 /* wake up the wait for termios */
720 wake_up_interruptible(&priv->delta_msr_wait);
721
722 /* break takes precedence over parity, which takes precedence over
723 * framing errors */
724 if (status & UART_BREAK_ERROR)
725 tty_flag = TTY_BREAK;
726 else if (status & UART_PARITY_ERROR)
727 tty_flag = TTY_PARITY;
728 else if (status & UART_FRAME_ERROR)
729 tty_flag = TTY_FRAME;
730 dev_dbg(&port->dev, "tty_flag = %d\n", tty_flag);
731
732 tty = tty_port_tty_get(&port->port);
733 if (tty && urb->actual_length) {
734 tty_buffer_request_room(tty, urb->actual_length + 1);
735 /* overrun is special, not associated with a char */
736 if (status & UART_OVERRUN_ERROR)
737 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
738 for (i = 0; i < urb->actual_length; ++i)
739 tty_insert_flip_char(tty, data[i], tty_flag);
740 tty_flip_buffer_push(tty);
741 }
742 tty_kref_put(tty);
743
744 /* Schedule the next read _if_ we are still open */
745 if (port->port.count) {
746 urb->dev = port->serial->dev;
747 result = usb_submit_urb(urb , GFP_ATOMIC);
748 if (result)
749 dev_dbg(&port->dev, "failed submitting read urb %d\n",
750 result);
751 }
752
753 return;
754 }
755
756 /* get data from ring buffer and then write to usb bus */
757 static void spcp8x5_send(struct usb_serial_port *port)
758 {
759 int count, result;
760 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
761 unsigned long flags;
762
763 spin_lock_irqsave(&priv->lock, flags);
764
765 if (priv->write_urb_in_use) {
766 dev_dbg(&port->dev, "write urb still used\n");
767 spin_unlock_irqrestore(&priv->lock, flags);
768 return;
769 }
770
771 /* send the 1st urb for writting */
772 memset(port->write_urb->transfer_buffer , 0x00 , port->bulk_out_size);
773 count = get_ringbuf(priv->buf, port->write_urb->transfer_buffer,
774 port->bulk_out_size);
775
776 if (count == 0) {
777 spin_unlock_irqrestore(&priv->lock, flags);
778 return;
779 }
780
781 /* update the urb status */
782 priv->write_urb_in_use = 1;
783
784 spin_unlock_irqrestore(&priv->lock, flags);
785
786 port->write_urb->transfer_buffer_length = count;
787 port->write_urb->dev = port->serial->dev;
788
789 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
790 if (result) {
791 dev_dbg(&port->dev, "failed submitting write urb, error %d\n",
792 result);
793 priv->write_urb_in_use = 0;
794 /* TODO: reschedule spcp8x5_send */
795 }
796
797
798 schedule_work(&port->work);
799 }
800
801 /* this is the call back function for write urb. NOTE we should not sleep in
802 * this routine. check the urb return code and then submit the write urb again
803 * to hold the write loop */
804 static void spcp8x5_write_bulk_callback(struct urb *urb)
805 {
806 struct usb_serial_port *port = urb->context;
807 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
808 int result;
809 int status = urb->status;
810
811 switch (status) {
812 case 0:
813 /* success */
814 break;
815 case -ECONNRESET:
816 case -ENOENT:
817 case -ESHUTDOWN:
818 /* this urb is terminated, clean up */
819 dev_dbg(&port->dev, "urb shutting down with status: %d\n",
820 status);
821 priv->write_urb_in_use = 0;
822 return;
823 default:
824 /* error in the urb, so we have to resubmit it */
825 dbg("%s - Overflow in write", __func__);
826 dbg("%s - nonzero write bulk status received: %d",
827 __func__, status);
828 port->write_urb->transfer_buffer_length = 1;
829 port->write_urb->dev = port->serial->dev;
830 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
831 if (result)
832 dev_dbg(&port->dev,
833 "failed resubmitting write urb %d\n", result);
834 else
835 return;
836 }
837
838 priv->write_urb_in_use = 0;
839
840 /* send any buffered data */
841 spcp8x5_send(port);
842 }
843
844 /* write data to ring buffer. and then start the write transfer */
845 static int spcp8x5_write(struct tty_struct *tty, struct usb_serial_port *port,
846 const unsigned char *buf, int count)
847 {
848 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
849 unsigned long flags;
850
851 dev_dbg(&port->dev, "%d bytes\n", count);
852
853 if (!count)
854 return count;
855
856 spin_lock_irqsave(&priv->lock, flags);
857 count = put_ringbuf(priv->buf, buf, count);
858 spin_unlock_irqrestore(&priv->lock, flags);
859
860 spcp8x5_send(port);
861
862 return count;
863 }
864
865 static int spcp8x5_wait_modem_info(struct usb_serial_port *port,
866 unsigned int arg)
867 {
868 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
869 unsigned long flags;
870 unsigned int prevstatus;
871 unsigned int status;
872 unsigned int changed;
873
874 spin_lock_irqsave(&priv->lock, flags);
875 prevstatus = priv->line_status;
876 spin_unlock_irqrestore(&priv->lock, flags);
877
878 while (1) {
879 /* wake up in bulk read */
880 interruptible_sleep_on(&priv->delta_msr_wait);
881
882 /* see if a signal did it */
883 if (signal_pending(current))
884 return -ERESTARTSYS;
885
886 spin_lock_irqsave(&priv->lock, flags);
887 status = priv->line_status;
888 spin_unlock_irqrestore(&priv->lock, flags);
889
890 changed = prevstatus^status;
891
892 if (((arg & TIOCM_RNG) && (changed & MSR_STATUS_LINE_RI)) ||
893 ((arg & TIOCM_DSR) && (changed & MSR_STATUS_LINE_DSR)) ||
894 ((arg & TIOCM_CD) && (changed & MSR_STATUS_LINE_DCD)) ||
895 ((arg & TIOCM_CTS) && (changed & MSR_STATUS_LINE_CTS)))
896 return 0;
897
898 prevstatus = status;
899 }
900 /* NOTREACHED */
901 return 0;
902 }
903
904 static int spcp8x5_ioctl(struct tty_struct *tty, struct file *file,
905 unsigned int cmd, unsigned long arg)
906 {
907 struct usb_serial_port *port = tty->driver_data;
908 dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
909
910 switch (cmd) {
911 case TIOCMIWAIT:
912 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
913 return spcp8x5_wait_modem_info(port, arg);
914
915 default:
916 dbg("%s not supported = 0x%04x", __func__, cmd);
917 break;
918 }
919
920 return -ENOIOCTLCMD;
921 }
922
923 static int spcp8x5_tiocmset(struct tty_struct *tty, struct file *file,
924 unsigned int set, unsigned int clear)
925 {
926 struct usb_serial_port *port = tty->driver_data;
927 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
928 unsigned long flags;
929 u8 control;
930
931 spin_lock_irqsave(&priv->lock, flags);
932 if (set & TIOCM_RTS)
933 priv->line_control |= MCR_RTS;
934 if (set & TIOCM_DTR)
935 priv->line_control |= MCR_DTR;
936 if (clear & TIOCM_RTS)
937 priv->line_control &= ~MCR_RTS;
938 if (clear & TIOCM_DTR)
939 priv->line_control &= ~MCR_DTR;
940 control = priv->line_control;
941 spin_unlock_irqrestore(&priv->lock, flags);
942
943 return spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
944 }
945
946 static int spcp8x5_tiocmget(struct tty_struct *tty, struct file *file)
947 {
948 struct usb_serial_port *port = tty->driver_data;
949 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
950 unsigned long flags;
951 unsigned int mcr;
952 unsigned int status;
953 unsigned int result;
954
955 spin_lock_irqsave(&priv->lock, flags);
956 mcr = priv->line_control;
957 status = priv->line_status;
958 spin_unlock_irqrestore(&priv->lock, flags);
959
960 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
961 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
962 | ((status & MSR_STATUS_LINE_CTS) ? TIOCM_CTS : 0)
963 | ((status & MSR_STATUS_LINE_DSR) ? TIOCM_DSR : 0)
964 | ((status & MSR_STATUS_LINE_RI) ? TIOCM_RI : 0)
965 | ((status & MSR_STATUS_LINE_DCD) ? TIOCM_CD : 0);
966
967 return result;
968 }
969
970 /* get the avail space room in ring buffer */
971 static int spcp8x5_write_room(struct tty_struct *tty)
972 {
973 struct usb_serial_port *port = tty->driver_data;
974 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
975 int room = 0;
976 unsigned long flags;
977
978 spin_lock_irqsave(&priv->lock, flags);
979 room = ringbuf_avail_space(priv->buf);
980 spin_unlock_irqrestore(&priv->lock, flags);
981
982 return room;
983 }
984
985 /* get the number of avail data in write ring buffer */
986 static int spcp8x5_chars_in_buffer(struct tty_struct *tty)
987 {
988 struct usb_serial_port *port = tty->driver_data;
989 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
990 int chars = 0;
991 unsigned long flags;
992
993 spin_lock_irqsave(&priv->lock, flags);
994 chars = ringbuf_avail_data(priv->buf);
995 spin_unlock_irqrestore(&priv->lock, flags);
996
997 return chars;
998 }
999
1000 /* All of the device info needed for the spcp8x5 SIO serial converter */
1001 static struct usb_serial_driver spcp8x5_device = {
1002 .driver = {
1003 .owner = THIS_MODULE,
1004 .name = "SPCP8x5",
1005 },
1006 .id_table = id_table,
1007 .num_ports = 1,
1008 .open = spcp8x5_open,
1009 .close = spcp8x5_close,
1010 .dtr_rts = spcp8x5_dtr_rts,
1011 .carrier_raised = spcp8x5_carrier_raised,
1012 .write = spcp8x5_write,
1013 .set_termios = spcp8x5_set_termios,
1014 .ioctl = spcp8x5_ioctl,
1015 .tiocmget = spcp8x5_tiocmget,
1016 .tiocmset = spcp8x5_tiocmset,
1017 .write_room = spcp8x5_write_room,
1018 .read_bulk_callback = spcp8x5_read_bulk_callback,
1019 .write_bulk_callback = spcp8x5_write_bulk_callback,
1020 .chars_in_buffer = spcp8x5_chars_in_buffer,
1021 .attach = spcp8x5_startup,
1022 .release = spcp8x5_release,
1023 };
1024
1025 static int __init spcp8x5_init(void)
1026 {
1027 int retval;
1028 retval = usb_serial_register(&spcp8x5_device);
1029 if (retval)
1030 goto failed_usb_serial_register;
1031 retval = usb_register(&spcp8x5_driver);
1032 if (retval)
1033 goto failed_usb_register;
1034 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1035 DRIVER_DESC "\n");
1036 return 0;
1037 failed_usb_register:
1038 usb_serial_deregister(&spcp8x5_device);
1039 failed_usb_serial_register:
1040 return retval;
1041 }
1042
1043 static void __exit spcp8x5_exit(void)
1044 {
1045 usb_deregister(&spcp8x5_driver);
1046 usb_serial_deregister(&spcp8x5_device);
1047 }
1048
1049 module_init(spcp8x5_init);
1050 module_exit(spcp8x5_exit);
1051
1052 MODULE_DESCRIPTION(DRIVER_DESC);
1053 MODULE_VERSION(DRIVER_VERSION);
1054 MODULE_LICENSE("GPL");
1055
1056 module_param(debug, bool, S_IRUGO | S_IWUSR);
1057 MODULE_PARM_DESC(debug, "Debug enabled or not");
kernel source for telekom puls (alcatel/mediatek)