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x86: 64-bit, add the new split_large_page() function
[wrt350n-kernel.git] / drivers / usb / serial / mos7720.c
blobe02c198016b02204ee5ef92c43850356e99d9264
1 /*
2 * mos7720.c
3 * Controls the Moschip 7720 usb to dual port serial convertor
4 *
5 * Copyright 2006 Moschip Semiconductor Tech. Ltd.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, version 2 of the License.
10 *
11 * Developed by:
12 * Vijaya Kumar <vijaykumar.gn@gmail.com>
13 * Ajay Kumar <naanuajay@yahoo.com>
14 * Gurudeva <ngurudeva@yahoo.com>
15 *
16 * Cleaned up from the original by:
17 * Greg Kroah-Hartman <gregkh@suse.de>
18 *
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
22 */
23 #include <linux/kernel.h>
24 #include <linux/errno.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/tty.h>
28 #include <linux/tty_driver.h>
29 #include <linux/tty_flip.h>
30 #include <linux/module.h>
31 #include <linux/spinlock.h>
32 #include <linux/serial.h>
33 #include <linux/serial_reg.h>
34 #include <linux/usb.h>
35 #include <linux/usb/serial.h>
36 #include <asm/uaccess.h>
37
38
39 /*
40 * Version Information
41 */
42 #define DRIVER_VERSION "1.0.0.4F"
43 #define DRIVER_AUTHOR "Aspire Communications pvt Ltd."
44 #define DRIVER_DESC "Moschip USB Serial Driver"
45
46 /* default urb timeout */
47 #define MOS_WDR_TIMEOUT (HZ * 5)
48
49 #define MOS_PORT1 0x0200
50 #define MOS_PORT2 0x0300
51 #define MOS_VENREG 0x0000
52 #define MOS_MAX_PORT 0x02
53 #define MOS_WRITE 0x0E
54 #define MOS_READ 0x0D
55
56 /* Interrupt Rotinue Defines */
57 #define SERIAL_IIR_RLS 0x06
58 #define SERIAL_IIR_RDA 0x04
59 #define SERIAL_IIR_CTI 0x0c
60 #define SERIAL_IIR_THR 0x02
61 #define SERIAL_IIR_MS 0x00
62
63 #define NUM_URBS 16 /* URB Count */
64 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
65
66 /* This structure holds all of the local port information */
67 struct moschip_port
68 {
69 __u8 shadowLCR; /* last LCR value received */
70 __u8 shadowMCR; /* last MCR value received */
71 __u8 shadowMSR; /* last MSR value received */
72 char open;
73 struct async_icount icount;
74 struct usb_serial_port *port; /* loop back to the owner */
75 struct urb *write_urb_pool[NUM_URBS];
76 };
77
78 /* This structure holds all of the individual serial device information */
79 struct moschip_serial
80 {
81 int interrupt_started;
82 };
83
84 static int debug;
85
86 #define USB_VENDOR_ID_MOSCHIP 0x9710
87 #define MOSCHIP_DEVICE_ID_7720 0x7720
88 #define MOSCHIP_DEVICE_ID_7715 0x7715
89
90 static struct usb_device_id moschip_port_id_table [] = {
91 { USB_DEVICE(USB_VENDOR_ID_MOSCHIP,MOSCHIP_DEVICE_ID_7720) },
92 { } /* terminating entry */
93 };
94 MODULE_DEVICE_TABLE(usb, moschip_port_id_table);
95
96
97 /*
98 * mos7720_interrupt_callback
99 * this is the callback function for when we have received data on the
100 * interrupt endpoint.
101 */
102 static void mos7720_interrupt_callback(struct urb *urb)
103 {
104 int result;
105 int length;
106 int status = urb->status;
107 __u8 *data;
108 __u8 sp1;
109 __u8 sp2;
110
111 dbg("%s"," : Entering\n");
112
113 switch (status) {
114 case 0:
115 /* success */
116 break;
117 case -ECONNRESET:
118 case -ENOENT:
119 case -ESHUTDOWN:
120 /* this urb is terminated, clean up */
121 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
122 status);
123 return;
124 default:
125 dbg("%s - nonzero urb status received: %d", __FUNCTION__,
126 status);
127 goto exit;
128 }
129
130 length = urb->actual_length;
131 data = urb->transfer_buffer;
132
133 /* Moschip get 4 bytes
134 * Byte 1 IIR Port 1 (port.number is 0)
135 * Byte 2 IIR Port 2 (port.number is 1)
136 * Byte 3 --------------
137 * Byte 4 FIFO status for both */
138
139 /* the above description is inverted
140 * oneukum 2007-03-14 */
141
142 if (unlikely(length != 4)) {
143 dbg("Wrong data !!!");
144 return;
145 }
146
147 sp1 = data[3];
148 sp2 = data[2];
149
150 if ((sp1 | sp2) & 0x01) {
151 /* No Interrupt Pending in both the ports */
152 dbg("No Interrupt !!!");
153 } else {
154 switch (sp1 & 0x0f) {
155 case SERIAL_IIR_RLS:
156 dbg("Serial Port 1: Receiver status error or address "
157 "bit detected in 9-bit mode\n");
158 break;
159 case SERIAL_IIR_CTI:
160 dbg("Serial Port 1: Receiver time out");
161 break;
162 case SERIAL_IIR_MS:
163 dbg("Serial Port 1: Modem status change");
164 break;
165 }
166
167 switch (sp2 & 0x0f) {
168 case SERIAL_IIR_RLS:
169 dbg("Serial Port 2: Receiver status error or address "
170 "bit detected in 9-bit mode");
171 break;
172 case SERIAL_IIR_CTI:
173 dbg("Serial Port 2: Receiver time out");
174 break;
175 case SERIAL_IIR_MS:
176 dbg("Serial Port 2: Modem status change");
177 break;
178 }
179 }
180
181 exit:
182 result = usb_submit_urb(urb, GFP_ATOMIC);
183 if (result)
184 dev_err(&urb->dev->dev,
185 "%s - Error %d submitting control urb\n",
186 __FUNCTION__, result);
187 return;
188 }
189
190 /*
191 * mos7720_bulk_in_callback
192 * this is the callback function for when we have received data on the
193 * bulk in endpoint.
194 */
195 static void mos7720_bulk_in_callback(struct urb *urb)
196 {
197 int retval;
198 unsigned char *data ;
199 struct usb_serial_port *port;
200 struct moschip_port *mos7720_port;
201 struct tty_struct *tty;
202 int status = urb->status;
203
204 if (status) {
205 dbg("nonzero read bulk status received: %d", status);
206 return;
207 }
208
209 mos7720_port = urb->context;
210 if (!mos7720_port) {
211 dbg("%s","NULL mos7720_port pointer \n");
212 return ;
213 }
214
215 port = mos7720_port->port;
216
217 dbg("Entering...%s", __FUNCTION__);
218
219 data = urb->transfer_buffer;
220
221 tty = port->tty;
222 if (tty && urb->actual_length) {
223 tty_buffer_request_room(tty, urb->actual_length);
224 tty_insert_flip_string(tty, data, urb->actual_length);
225 tty_flip_buffer_push(tty);
226 }
227
228 if (!port->read_urb) {
229 dbg("URB KILLED !!!");
230 return;
231 }
232
233 if (port->read_urb->status != -EINPROGRESS) {
234 port->read_urb->dev = port->serial->dev;
235
236 retval = usb_submit_urb(port->read_urb, GFP_ATOMIC);
237 if (retval)
238 dbg("usb_submit_urb(read bulk) failed, retval = %d",
239 retval);
240 }
241 }
242
243 /*
244 * mos7720_bulk_out_data_callback
245 * this is the callback function for when we have finished sending serial
246 * data on the bulk out endpoint.
247 */
248 static void mos7720_bulk_out_data_callback(struct urb *urb)
249 {
250 struct moschip_port *mos7720_port;
251 struct tty_struct *tty;
252 int status = urb->status;
253
254 if (status) {
255 dbg("nonzero write bulk status received:%d", status);
256 return;
257 }
258
259 mos7720_port = urb->context;
260 if (!mos7720_port) {
261 dbg("NULL mos7720_port pointer");
262 return ;
263 }
264
265 dbg("Entering .........");
266
267 tty = mos7720_port->port->tty;
268
269 if (tty && mos7720_port->open)
270 tty_wakeup(tty);
271 }
272
273 /*
274 * send_mos_cmd
275 * this function will be used for sending command to device
276 */
277 static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value,
278 __u16 index, void *data)
279 {
280 int status;
281 unsigned int pipe;
282 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
283 __u8 requesttype;
284 __u16 size = 0x0000;
285
286 if (value < MOS_MAX_PORT) {
287 if (product == MOSCHIP_DEVICE_ID_7715) {
288 value = value*0x100+0x100;
289 } else {
290 value = value*0x100+0x200;
291 }
292 } else {
293 value = 0x0000;
294 if ((product == MOSCHIP_DEVICE_ID_7715) &&
295 (index != 0x08)) {
296 dbg("serial->product== MOSCHIP_DEVICE_ID_7715");
297 //index = 0x01 ;
298 }
299 }
300
301 if (request == MOS_WRITE) {
302 request = (__u8)MOS_WRITE;
303 requesttype = (__u8)0x40;
304 value = value + (__u16)*((unsigned char *)data);
305 data = NULL;
306 pipe = usb_sndctrlpipe(serial->dev, 0);
307 } else {
308 request = (__u8)MOS_READ;
309 requesttype = (__u8)0xC0;
310 size = 0x01;
311 pipe = usb_rcvctrlpipe(serial->dev,0);
312 }
313
314 status = usb_control_msg(serial->dev, pipe, request, requesttype,
315 value, index, data, size, MOS_WDR_TIMEOUT);
316
317 if (status < 0)
318 dbg("Command Write failed Value %x index %x\n",value,index);
319
320 return status;
321 }
322
323 static int mos7720_open(struct usb_serial_port *port, struct file * filp)
324 {
325 struct usb_serial *serial;
326 struct usb_serial_port *port0;
327 struct urb *urb;
328 struct moschip_serial *mos7720_serial;
329 struct moschip_port *mos7720_port;
330 int response;
331 int port_number;
332 char data;
333 int allocated_urbs = 0;
334 int j;
335
336 serial = port->serial;
337
338 mos7720_port = usb_get_serial_port_data(port);
339 if (mos7720_port == NULL)
340 return -ENODEV;
341
342 port0 = serial->port[0];
343
344 mos7720_serial = usb_get_serial_data(serial);
345
346 if (mos7720_serial == NULL || port0 == NULL)
347 return -ENODEV;
348
349 usb_clear_halt(serial->dev, port->write_urb->pipe);
350 usb_clear_halt(serial->dev, port->read_urb->pipe);
351
352 /* Initialising the write urb pool */
353 for (j = 0; j < NUM_URBS; ++j) {
354 urb = usb_alloc_urb(0,GFP_KERNEL);
355 mos7720_port->write_urb_pool[j] = urb;
356
357 if (urb == NULL) {
358 err("No more urbs???");
359 continue;
360 }
361
362 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
363 GFP_KERNEL);
364 if (!urb->transfer_buffer) {
365 err("%s-out of memory for urb buffers.", __FUNCTION__);
366 usb_free_urb(mos7720_port->write_urb_pool[j]);
367 mos7720_port->write_urb_pool[j] = NULL;
368 continue;
369 }
370 allocated_urbs++;
371 }
372
373 if (!allocated_urbs)
374 return -ENOMEM;
375
376 /* Initialize MCS7720 -- Write Init values to corresponding Registers
377 *
378 * Register Index
379 * 1 : IER
380 * 2 : FCR
381 * 3 : LCR
382 * 4 : MCR
383 *
384 * 0x08 : SP1/2 Control Reg
385 */
386 port_number = port->number - port->serial->minor;
387 send_mos_cmd(port->serial, MOS_READ, port_number, UART_LSR, &data);
388 dbg("SS::%p LSR:%x\n",mos7720_port, data);
389
390 dbg("Check:Sending Command ..........");
391
392 data = 0x02;
393 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x01, &data);
394 data = 0x02;
395 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x02, &data);
396
397 data = 0x00;
398 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
399 data = 0x00;
400 send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
401
402 data = 0xCF;
403 send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
404 data = 0x03;
405 mos7720_port->shadowLCR = data;
406 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
407 data = 0x0b;
408 mos7720_port->shadowMCR = data;
409 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
410 data = 0x0b;
411 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
412
413 data = 0x00;
414 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
415 data = 0x00;
416 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
417
418 /* data = 0x00;
419 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, port_number + 1, &data);
420 data = 0x03;
421 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
422 data = 0x00;
423 send_mos_cmd(port->serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
424 */
425 data = 0x00;
426 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
427
428 data = data | (port->number - port->serial->minor + 1);
429 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
430
431 data = 0x83;
432 mos7720_port->shadowLCR = data;
433 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
434 data = 0x0c;
435 send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
436 data = 0x00;
437 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
438 data = 0x03;
439 mos7720_port->shadowLCR = data;
440 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
441 data = 0x0c;
442 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
443 data = 0x0c;
444 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
445
446 //Matrix
447
448 /* force low_latency on so that our tty_push actually forces *
449 * the data through,otherwise it is scheduled, and with *
450 * high data rates (like with OHCI) data can get lost. */
451
452 if (port->tty)
453 port->tty->low_latency = 1;
454
455 /* see if we've set up our endpoint info yet *
456 * (can't set it up in mos7720_startup as the *
457 * structures were not set up at that time.) */
458 if (!mos7720_serial->interrupt_started) {
459 dbg("Interrupt buffer NULL !!!");
460
461 /* not set up yet, so do it now */
462 mos7720_serial->interrupt_started = 1;
463
464 dbg("To Submit URB !!!");
465
466 /* set up our interrupt urb */
467 usb_fill_int_urb(port0->interrupt_in_urb, serial->dev,
468 usb_rcvintpipe(serial->dev,
469 port->interrupt_in_endpointAddress),
470 port0->interrupt_in_buffer,
471 port0->interrupt_in_urb->transfer_buffer_length,
472 mos7720_interrupt_callback, mos7720_port,
473 port0->interrupt_in_urb->interval);
474
475 /* start interrupt read for this mos7720 this interrupt *
476 * will continue as long as the mos7720 is connected */
477 dbg("Submit URB over !!!");
478 response = usb_submit_urb(port0->interrupt_in_urb, GFP_KERNEL);
479 if (response)
480 dev_err(&port->dev,
481 "%s - Error %d submitting control urb\n",
482 __FUNCTION__, response);
483 }
484
485 /* set up our bulk in urb */
486 usb_fill_bulk_urb(port->read_urb, serial->dev,
487 usb_rcvbulkpipe(serial->dev,
488 port->bulk_in_endpointAddress),
489 port->bulk_in_buffer,
490 port->read_urb->transfer_buffer_length,
491 mos7720_bulk_in_callback, mos7720_port);
492 response = usb_submit_urb(port->read_urb, GFP_KERNEL);
493 if (response)
494 dev_err(&port->dev,
495 "%s - Error %d submitting read urb\n", __FUNCTION__, response);
496
497 /* initialize our icount structure */
498 memset(&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount));
499
500 /* initialize our port settings */
501 mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */
502
503 /* send a open port command */
504 mos7720_port->open = 1;
505
506 return 0;
507 }
508
509 /*
510 * mos7720_chars_in_buffer
511 * this function is called by the tty driver when it wants to know how many
512 * bytes of data we currently have outstanding in the port (data that has
513 * been written, but hasn't made it out the port yet)
514 * If successful, we return the number of bytes left to be written in the
515 * system,
516 * Otherwise we return a negative error number.
517 */
518 static int mos7720_chars_in_buffer(struct usb_serial_port *port)
519 {
520 int i;
521 int chars = 0;
522 struct moschip_port *mos7720_port;
523
524 dbg("%s:entering ...........", __FUNCTION__);
525
526 mos7720_port = usb_get_serial_port_data(port);
527 if (mos7720_port == NULL) {
528 dbg("%s:leaving ...........", __FUNCTION__);
529 return -ENODEV;
530 }
531
532 for (i = 0; i < NUM_URBS; ++i) {
533 if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status == -EINPROGRESS)
534 chars += URB_TRANSFER_BUFFER_SIZE;
535 }
536 dbg("%s - returns %d", __FUNCTION__, chars);
537 return chars;
538 }
539
540 static void mos7720_close(struct usb_serial_port *port, struct file *filp)
541 {
542 struct usb_serial *serial;
543 struct moschip_port *mos7720_port;
544 char data;
545 int j;
546
547 dbg("mos7720_close:entering...");
548
549 serial = port->serial;
550
551 mos7720_port = usb_get_serial_port_data(port);
552 if (mos7720_port == NULL)
553 return;
554
555 for (j = 0; j < NUM_URBS; ++j)
556 usb_kill_urb(mos7720_port->write_urb_pool[j]);
557
558 /* Freeing Write URBs */
559 for (j = 0; j < NUM_URBS; ++j) {
560 if (mos7720_port->write_urb_pool[j]) {
561 kfree(mos7720_port->write_urb_pool[j]->transfer_buffer);
562 usb_free_urb(mos7720_port->write_urb_pool[j]);
563 }
564 }
565
566 /* While closing port, shutdown all bulk read, write *
567 * and interrupt read if they exists */
568 if (serial->dev) {
569 dbg("Shutdown bulk write");
570 usb_kill_urb(port->write_urb);
571 dbg("Shutdown bulk read");
572 usb_kill_urb(port->read_urb);
573 }
574
575 data = 0x00;
576 send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
577 0x04, &data);
578
579 data = 0x00;
580 send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
581 0x01, &data);
582
583 mos7720_port->open = 0;
584
585 dbg("Leaving %s", __FUNCTION__);
586 }
587
588 static void mos7720_break(struct usb_serial_port *port, int break_state)
589 {
590 unsigned char data;
591 struct usb_serial *serial;
592 struct moschip_port *mos7720_port;
593
594 dbg("Entering %s", __FUNCTION__);
595
596 serial = port->serial;
597
598 mos7720_port = usb_get_serial_port_data(port);
599 if (mos7720_port == NULL)
600 return;
601
602 if (break_state == -1)
603 data = mos7720_port->shadowLCR | UART_LCR_SBC;
604 else
605 data = mos7720_port->shadowLCR & ~UART_LCR_SBC;
606
607 mos7720_port->shadowLCR = data;
608 send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
609 0x03, &data);
610
611 return;
612 }
613
614 /*
615 * mos7720_write_room
616 * this function is called by the tty driver when it wants to know how many
617 * bytes of data we can accept for a specific port.
618 * If successful, we return the amount of room that we have for this port
619 * Otherwise we return a negative error number.
620 */
621 static int mos7720_write_room(struct usb_serial_port *port)
622 {
623 struct moschip_port *mos7720_port;
624 int room = 0;
625 int i;
626
627 dbg("%s:entering ...........", __FUNCTION__);
628
629 mos7720_port = usb_get_serial_port_data(port);
630 if (mos7720_port == NULL) {
631 dbg("%s:leaving ...........", __FUNCTION__);
632 return -ENODEV;
633 }
634
635 for (i = 0; i < NUM_URBS; ++i) {
636 if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
637 room += URB_TRANSFER_BUFFER_SIZE;
638 }
639
640 dbg("%s - returns %d", __FUNCTION__, room);
641 return room;
642 }
643
644 static int mos7720_write(struct usb_serial_port *port,
645 const unsigned char *data, int count)
646 {
647 int status;
648 int i;
649 int bytes_sent = 0;
650 int transfer_size;
651
652 struct moschip_port *mos7720_port;
653 struct usb_serial *serial;
654 struct urb *urb;
655 const unsigned char *current_position = data;
656
657 dbg("%s:entering ...........", __FUNCTION__);
658
659 serial = port->serial;
660
661 mos7720_port = usb_get_serial_port_data(port);
662 if (mos7720_port == NULL) {
663 dbg("mos7720_port is NULL");
664 return -ENODEV;
665 }
666
667 /* try to find a free urb in the list */
668 urb = NULL;
669
670 for (i = 0; i < NUM_URBS; ++i) {
671 if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) {
672 urb = mos7720_port->write_urb_pool[i];
673 dbg("URB:%d",i);
674 break;
675 }
676 }
677
678 if (urb == NULL) {
679 dbg("%s - no more free urbs", __FUNCTION__);
680 goto exit;
681 }
682
683 if (urb->transfer_buffer == NULL) {
684 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
685 GFP_KERNEL);
686 if (urb->transfer_buffer == NULL) {
687 err("%s no more kernel memory...", __FUNCTION__);
688 goto exit;
689 }
690 }
691 transfer_size = min (count, URB_TRANSFER_BUFFER_SIZE);
692
693 memcpy(urb->transfer_buffer, current_position, transfer_size);
694 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size,
695 urb->transfer_buffer);
696
697 /* fill urb with data and submit */
698 usb_fill_bulk_urb(urb, serial->dev,
699 usb_sndbulkpipe(serial->dev,
700 port->bulk_out_endpointAddress),
701 urb->transfer_buffer, transfer_size,
702 mos7720_bulk_out_data_callback, mos7720_port);
703
704 /* send it down the pipe */
705 status = usb_submit_urb(urb,GFP_ATOMIC);
706 if (status) {
707 err("%s - usb_submit_urb(write bulk) failed with status = %d",
708 __FUNCTION__, status);
709 bytes_sent = status;
710 goto exit;
711 }
712 bytes_sent = transfer_size;
713
714 exit:
715 return bytes_sent;
716 }
717
718 static void mos7720_throttle(struct usb_serial_port *port)
719 {
720 struct moschip_port *mos7720_port;
721 struct tty_struct *tty;
722 int status;
723
724 dbg("%s- port %d\n", __FUNCTION__, port->number);
725
726 mos7720_port = usb_get_serial_port_data(port);
727
728 if (mos7720_port == NULL)
729 return;
730
731 if (!mos7720_port->open) {
732 dbg("port not opened");
733 return;
734 }
735
736 dbg("%s: Entering ..........", __FUNCTION__);
737
738 tty = port->tty;
739 if (!tty) {
740 dbg("%s - no tty available", __FUNCTION__);
741 return;
742 }
743
744 /* if we are implementing XON/XOFF, send the stop character */
745 if (I_IXOFF(tty)) {
746 unsigned char stop_char = STOP_CHAR(tty);
747 status = mos7720_write(port, &stop_char, 1);
748 if (status <= 0)
749 return;
750 }
751
752 /* if we are implementing RTS/CTS, toggle that line */
753 if (tty->termios->c_cflag & CRTSCTS) {
754 mos7720_port->shadowMCR &= ~UART_MCR_RTS;
755 status = send_mos_cmd(port->serial, MOS_WRITE,
756 port->number - port->serial->minor,
757 UART_MCR, &mos7720_port->shadowMCR);
758 if (status != 0)
759 return;
760 }
761 }
762
763 static void mos7720_unthrottle(struct usb_serial_port *port)
764 {
765 struct tty_struct *tty;
766 int status;
767 struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
768
769 if (mos7720_port == NULL)
770 return;
771
772 if (!mos7720_port->open) {
773 dbg("%s - port not opened", __FUNCTION__);
774 return;
775 }
776
777 dbg("%s: Entering ..........", __FUNCTION__);
778
779 tty = port->tty;
780 if (!tty) {
781 dbg("%s - no tty available", __FUNCTION__);
782 return;
783 }
784
785 /* if we are implementing XON/XOFF, send the start character */
786 if (I_IXOFF(tty)) {
787 unsigned char start_char = START_CHAR(tty);
788 status = mos7720_write(port, &start_char, 1);
789 if (status <= 0)
790 return;
791 }
792
793 /* if we are implementing RTS/CTS, toggle that line */
794 if (tty->termios->c_cflag & CRTSCTS) {
795 mos7720_port->shadowMCR |= UART_MCR_RTS;
796 status = send_mos_cmd(port->serial, MOS_WRITE,
797 port->number - port->serial->minor,
798 UART_MCR, &mos7720_port->shadowMCR);
799 if (status != 0)
800 return;
801 }
802 }
803
804 static int set_higher_rates(struct moschip_port *mos7720_port,
805 unsigned int baud)
806 {
807 unsigned char data;
808 struct usb_serial_port *port;
809 struct usb_serial *serial;
810 int port_number;
811
812 if (mos7720_port == NULL)
813 return -EINVAL;
814
815 port = mos7720_port->port;
816 serial = port->serial;
817
818 /***********************************************
819 * Init Sequence for higher rates
820 ***********************************************/
821 dbg("Sending Setting Commands ..........");
822 port_number = port->number - port->serial->minor;
823
824 data = 0x000;
825 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
826 data = 0x000;
827 send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
828 data = 0x0CF;
829 send_mos_cmd(serial, MOS_WRITE, port->number, 0x02, &data);
830 data = 0x00b;
831 mos7720_port->shadowMCR = data;
832 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
833 data = 0x00b;
834 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
835
836 data = 0x000;
837 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
838 data = 0x000;
839 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
840
841
842 /***********************************************
843 * Set for higher rates *
844 ***********************************************/
845
846 data = baud * 0x10;
847 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1,&data);
848
849 data = 0x003;
850 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
851 data = 0x003;
852 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
853
854 data = 0x02b;
855 mos7720_port->shadowMCR = data;
856 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
857 data = 0x02b;
858 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
859
860 /***********************************************
861 * Set DLL/DLM
862 ***********************************************/
863
864 data = mos7720_port->shadowLCR | UART_LCR_DLAB;
865 mos7720_port->shadowLCR = data;
866 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
867
868 data = 0x001; /* DLL */
869 send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
870 data = 0x000; /* DLM */
871 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
872
873 data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
874 mos7720_port->shadowLCR = data;
875 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
876
877 return 0;
878 }
879
880 /* baud rate information */
881 struct divisor_table_entry
882 {
883 __u32 baudrate;
884 __u16 divisor;
885 };
886
887 /* Define table of divisors for moschip 7720 hardware *
888 * These assume a 3.6864MHz crystal, the standard /16, and *
889 * MCR.7 = 0. */
890 static struct divisor_table_entry divisor_table[] = {
891 { 50, 2304},
892 { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */
893 { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */
894 { 150, 768},
895 { 300, 384},
896 { 600, 192},
897 { 1200, 96},
898 { 1800, 64},
899 { 2400, 48},
900 { 4800, 24},
901 { 7200, 16},
902 { 9600, 12},
903 { 19200, 6},
904 { 38400, 3},
905 { 57600, 2},
906 { 115200, 1},
907 };
908
909 /*****************************************************************************
910 * calc_baud_rate_divisor
911 * this function calculates the proper baud rate divisor for the specified
912 * baud rate.
913 *****************************************************************************/
914 static int calc_baud_rate_divisor(int baudrate, int *divisor)
915 {
916 int i;
917 __u16 custom;
918 __u16 round1;
919 __u16 round;
920
921
922 dbg("%s - %d", __FUNCTION__, baudrate);
923
924 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
925 if (divisor_table[i].baudrate == baudrate) {
926 *divisor = divisor_table[i].divisor;
927 return 0;
928 }
929 }
930
931 /* After trying for all the standard baud rates *
932 * Try calculating the divisor for this baud rate */
933 if (baudrate > 75 && baudrate < 230400) {
934 /* get the divisor */
935 custom = (__u16)(230400L / baudrate);
936
937 /* Check for round off */
938 round1 = (__u16)(2304000L / baudrate);
939 round = (__u16)(round1 - (custom * 10));
940 if (round > 4)
941 custom++;
942 *divisor = custom;
943
944 dbg("Baud %d = %d",baudrate, custom);
945 return 0;
946 }
947
948 dbg("Baud calculation Failed...");
949 return -EINVAL;
950 }
951
952 /*
953 * send_cmd_write_baud_rate
954 * this function sends the proper command to change the baud rate of the
955 * specified port.
956 */
957 static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port,
958 int baudrate)
959 {
960 struct usb_serial_port *port;
961 struct usb_serial *serial;
962 int divisor;
963 int status;
964 unsigned char data;
965 unsigned char number;
966
967 if (mos7720_port == NULL)
968 return -1;
969
970 port = mos7720_port->port;
971 serial = port->serial;
972
973 dbg("%s: Entering ..........", __FUNCTION__);
974
975 number = port->number - port->serial->minor;
976 dbg("%s - port = %d, baud = %d", __FUNCTION__, port->number, baudrate);
977
978 /* Calculate the Divisor */
979 status = calc_baud_rate_divisor(baudrate, &divisor);
980 if (status) {
981 err("%s - bad baud rate", __FUNCTION__);
982 return status;
983 }
984
985 /* Enable access to divisor latch */
986 data = mos7720_port->shadowLCR | UART_LCR_DLAB;
987 mos7720_port->shadowLCR = data;
988 send_mos_cmd(serial, MOS_WRITE, number, UART_LCR, &data);
989
990 /* Write the divisor */
991 data = ((unsigned char)(divisor & 0xff));
992 send_mos_cmd(serial, MOS_WRITE, number, 0x00, &data);
993
994 data = ((unsigned char)((divisor & 0xff00) >> 8));
995 send_mos_cmd(serial, MOS_WRITE, number, 0x01, &data);
996
997 /* Disable access to divisor latch */
998 data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
999 mos7720_port->shadowLCR = data;
1000 send_mos_cmd(serial, MOS_WRITE, number, 0x03, &data);
1001
1002 return status;
1003 }
1004
1005 /*
1006 * change_port_settings
1007 * This routine is called to set the UART on the device to match
1008 * the specified new settings.
1009 */
1010 static void change_port_settings(struct moschip_port *mos7720_port,
1011 struct ktermios *old_termios)
1012 {
1013 struct usb_serial_port *port;
1014 struct usb_serial *serial;
1015 struct tty_struct *tty;
1016 int baud;
1017 unsigned cflag;
1018 unsigned iflag;
1019 __u8 mask = 0xff;
1020 __u8 lData;
1021 __u8 lParity;
1022 __u8 lStop;
1023 int status;
1024 int port_number;
1025 char data;
1026
1027 if (mos7720_port == NULL)
1028 return ;
1029
1030 port = mos7720_port->port;
1031 serial = port->serial;
1032 port_number = port->number - port->serial->minor;
1033
1034 dbg("%s - port %d", __FUNCTION__, port->number);
1035
1036 if (!mos7720_port->open) {
1037 dbg("%s - port not opened", __FUNCTION__);
1038 return;
1039 }
1040
1041 tty = mos7720_port->port->tty;
1042
1043 if ((!tty) || (!tty->termios)) {
1044 dbg("%s - no tty structures", __FUNCTION__);
1045 return;
1046 }
1047
1048 dbg("%s: Entering ..........", __FUNCTION__);
1049
1050 lData = UART_LCR_WLEN8;
1051 lStop = 0x00; /* 1 stop bit */
1052 lParity = 0x00; /* No parity */
1053
1054 cflag = tty->termios->c_cflag;
1055 iflag = tty->termios->c_iflag;
1056
1057 /* Change the number of bits */
1058 switch (cflag & CSIZE) {
1059 case CS5:
1060 lData = UART_LCR_WLEN5;
1061 mask = 0x1f;
1062 break;
1063
1064 case CS6:
1065 lData = UART_LCR_WLEN6;
1066 mask = 0x3f;
1067 break;
1068
1069 case CS7:
1070 lData = UART_LCR_WLEN7;
1071 mask = 0x7f;
1072 break;
1073 default:
1074 case CS8:
1075 lData = UART_LCR_WLEN8;
1076 break;
1077 }
1078
1079 /* Change the Parity bit */
1080 if (cflag & PARENB) {
1081 if (cflag & PARODD) {
1082 lParity = UART_LCR_PARITY;
1083 dbg("%s - parity = odd", __FUNCTION__);
1084 } else {
1085 lParity = (UART_LCR_EPAR | UART_LCR_PARITY);
1086 dbg("%s - parity = even", __FUNCTION__);
1087 }
1088
1089 } else {
1090 dbg("%s - parity = none", __FUNCTION__);
1091 }
1092
1093 if (cflag & CMSPAR)
1094 lParity = lParity | 0x20;
1095
1096 /* Change the Stop bit */
1097 if (cflag & CSTOPB) {
1098 lStop = UART_LCR_STOP;
1099 dbg("%s - stop bits = 2", __FUNCTION__);
1100 } else {
1101 lStop = 0x00;
1102 dbg("%s - stop bits = 1", __FUNCTION__);
1103 }
1104
1105 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
1106 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
1107 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
1108
1109 /* Update the LCR with the correct value */
1110 mos7720_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1111 mos7720_port->shadowLCR |= (lData | lParity | lStop);
1112
1113
1114 /* Disable Interrupts */
1115 data = 0x00;
1116 send_mos_cmd(serial,MOS_WRITE,port->number - port->serial->minor, UART_IER, &data);
1117
1118 data = 0x00;
1119 send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
1120
1121 data = 0xcf;
1122 send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
1123
1124 /* Send the updated LCR value to the mos7720 */
1125 data = mos7720_port->shadowLCR;
1126 send_mos_cmd(serial, MOS_WRITE, port_number, UART_LCR, &data);
1127
1128 data = 0x00b;
1129 mos7720_port->shadowMCR = data;
1130 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
1131 data = 0x00b;
1132 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
1133
1134 /* set up the MCR register and send it to the mos7720 */
1135 mos7720_port->shadowMCR = UART_MCR_OUT2;
1136 if (cflag & CBAUD)
1137 mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS);
1138
1139 if (cflag & CRTSCTS) {
1140 mos7720_port->shadowMCR |= (UART_MCR_XONANY);
1141
1142 /* To set hardware flow control to the specified *
1143 * serial port, in SP1/2_CONTROL_REG */
1144 if (port->number) {
1145 data = 0x001;
1146 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
1147 0x08, &data);
1148 } else {
1149 data = 0x002;
1150 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
1151 0x08, &data);
1152 }
1153 } else {
1154 mos7720_port->shadowMCR &= ~(UART_MCR_XONANY);
1155 }
1156
1157 data = mos7720_port->shadowMCR;
1158 send_mos_cmd(serial, MOS_WRITE, port_number, UART_MCR, &data);
1159
1160 /* Determine divisor based on baud rate */
1161 baud = tty_get_baud_rate(tty);
1162 if (!baud) {
1163 /* pick a default, any default... */
1164 dbg("Picked default baud...");
1165 baud = 9600;
1166 }
1167
1168 if (baud >= 230400) {
1169 set_higher_rates(mos7720_port, baud);
1170 /* Enable Interrupts */
1171 data = 0x0c;
1172 send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
1173 return;
1174 }
1175
1176 dbg("%s - baud rate = %d", __FUNCTION__, baud);
1177 status = send_cmd_write_baud_rate(mos7720_port, baud);
1178
1179 /* Enable Interrupts */
1180 data = 0x0c;
1181 send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
1182
1183 if (port->read_urb->status != -EINPROGRESS) {
1184 port->read_urb->dev = serial->dev;
1185
1186 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1187 if (status)
1188 dbg("usb_submit_urb(read bulk) failed, status = %d",
1189 status);
1190 }
1191 return;
1192 }
1193
1194 /*
1195 * mos7720_set_termios
1196 * this function is called by the tty driver when it wants to change the
1197 * termios structure.
1198 */
1199 static void mos7720_set_termios(struct usb_serial_port *port,
1200 struct ktermios *old_termios)
1201 {
1202 int status;
1203 unsigned int cflag;
1204 struct usb_serial *serial;
1205 struct moschip_port *mos7720_port;
1206 struct tty_struct *tty;
1207
1208 serial = port->serial;
1209
1210 mos7720_port = usb_get_serial_port_data(port);
1211
1212 if (mos7720_port == NULL)
1213 return;
1214
1215 tty = port->tty;
1216
1217 if (!port->tty || !port->tty->termios) {
1218 dbg("%s - no tty or termios", __FUNCTION__);
1219 return;
1220 }
1221
1222 if (!mos7720_port->open) {
1223 dbg("%s - port not opened", __FUNCTION__);
1224 return;
1225 }
1226
1227 dbg("%s\n","setting termios - ASPIRE");
1228
1229 cflag = tty->termios->c_cflag;
1230
1231 if (!cflag) {
1232 printk("%s %s\n",__FUNCTION__,"cflag is NULL");
1233 return;
1234 }
1235
1236 dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
1237 tty->termios->c_cflag,
1238 RELEVANT_IFLAG(tty->termios->c_iflag));
1239
1240 if (old_termios)
1241 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
1242 old_termios->c_cflag,
1243 RELEVANT_IFLAG(old_termios->c_iflag));
1244
1245 dbg("%s - port %d", __FUNCTION__, port->number);
1246
1247 /* change the port settings to the new ones specified */
1248 change_port_settings(mos7720_port, old_termios);
1249
1250 if(!port->read_urb) {
1251 dbg("%s","URB KILLED !!!!!\n");
1252 return;
1253 }
1254
1255 if(port->read_urb->status != -EINPROGRESS) {
1256 port->read_urb->dev = serial->dev;
1257 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1258 if (status)
1259 dbg("usb_submit_urb(read bulk) failed, status = %d",
1260 status);
1261 }
1262 return;
1263 }
1264
1265 /*
1266 * get_lsr_info - get line status register info
1267 *
1268 * Purpose: Let user call ioctl() to get info when the UART physically
1269 * is emptied. On bus types like RS485, the transmitter must
1270 * release the bus after transmitting. This must be done when
1271 * the transmit shift register is empty, not be done when the
1272 * transmit holding register is empty. This functionality
1273 * allows an RS485 driver to be written in user space.
1274 */
1275 static int get_lsr_info(struct moschip_port *mos7720_port,
1276 unsigned int __user *value)
1277 {
1278 int count;
1279 unsigned int result = 0;
1280
1281 count = mos7720_chars_in_buffer(mos7720_port->port);
1282 if (count == 0) {
1283 dbg("%s -- Empty", __FUNCTION__);
1284 result = TIOCSER_TEMT;
1285 }
1286
1287 if (copy_to_user(value, &result, sizeof(int)))
1288 return -EFAULT;
1289 return 0;
1290 }
1291
1292 /*
1293 * get_number_bytes_avail - get number of bytes available
1294 *
1295 * Purpose: Let user call ioctl to get the count of number of bytes available.
1296 */
1297 static int get_number_bytes_avail(struct moschip_port *mos7720_port,
1298 unsigned int __user *value)
1299 {
1300 unsigned int result = 0;
1301 struct tty_struct *tty = mos7720_port->port->tty;
1302
1303 if (!tty)
1304 return -ENOIOCTLCMD;
1305
1306 result = tty->read_cnt;
1307
1308 dbg("%s(%d) = %d", __FUNCTION__, mos7720_port->port->number, result);
1309 if (copy_to_user(value, &result, sizeof(int)))
1310 return -EFAULT;
1311
1312 return -ENOIOCTLCMD;
1313 }
1314
1315 static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
1316 unsigned int __user *value)
1317 {
1318 unsigned int mcr ;
1319 unsigned int arg;
1320 unsigned char data;
1321
1322 struct usb_serial_port *port;
1323
1324 if (mos7720_port == NULL)
1325 return -1;
1326
1327 port = (struct usb_serial_port*)mos7720_port->port;
1328 mcr = mos7720_port->shadowMCR;
1329
1330 if (copy_from_user(&arg, value, sizeof(int)))
1331 return -EFAULT;
1332
1333 switch (cmd) {
1334 case TIOCMBIS:
1335 if (arg & TIOCM_RTS)
1336 mcr |= UART_MCR_RTS;
1337 if (arg & TIOCM_DTR)
1338 mcr |= UART_MCR_RTS;
1339 if (arg & TIOCM_LOOP)
1340 mcr |= UART_MCR_LOOP;
1341 break;
1342
1343 case TIOCMBIC:
1344 if (arg & TIOCM_RTS)
1345 mcr &= ~UART_MCR_RTS;
1346 if (arg & TIOCM_DTR)
1347 mcr &= ~UART_MCR_RTS;
1348 if (arg & TIOCM_LOOP)
1349 mcr &= ~UART_MCR_LOOP;
1350 break;
1351
1352 case TIOCMSET:
1353 /* turn off the RTS and DTR and LOOPBACK
1354 * and then only turn on what was asked to */
1355 mcr &= ~(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_LOOP);
1356 mcr |= ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0);
1357 mcr |= ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0);
1358 mcr |= ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0);
1359 break;
1360 }
1361
1362 mos7720_port->shadowMCR = mcr;
1363
1364 data = mos7720_port->shadowMCR;
1365 send_mos_cmd(port->serial, MOS_WRITE,
1366 port->number - port->serial->minor, UART_MCR, &data);
1367
1368 return 0;
1369 }
1370
1371 static int get_modem_info(struct moschip_port *mos7720_port,
1372 unsigned int __user *value)
1373 {
1374 unsigned int result = 0;
1375 unsigned int msr = mos7720_port->shadowMSR;
1376 unsigned int mcr = mos7720_port->shadowMCR;
1377
1378 result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1379 | ((mcr & UART_MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1380 | ((msr & UART_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1381 | ((msr & UART_MSR_DCD) ? TIOCM_CAR: 0) /* 0x040 */
1382 | ((msr & UART_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1383 | ((msr & UART_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1384
1385
1386 dbg("%s -- %x", __FUNCTION__, result);
1387
1388 if (copy_to_user(value, &result, sizeof(int)))
1389 return -EFAULT;
1390 return 0;
1391 }
1392
1393 static int get_serial_info(struct moschip_port *mos7720_port,
1394 struct serial_struct __user *retinfo)
1395 {
1396 struct serial_struct tmp;
1397
1398 if (!retinfo)
1399 return -EFAULT;
1400
1401 memset(&tmp, 0, sizeof(tmp));
1402
1403 tmp.type = PORT_16550A;
1404 tmp.line = mos7720_port->port->serial->minor;
1405 tmp.port = mos7720_port->port->number;
1406 tmp.irq = 0;
1407 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1408 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
1409 tmp.baud_base = 9600;
1410 tmp.close_delay = 5*HZ;
1411 tmp.closing_wait = 30*HZ;
1412
1413 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1414 return -EFAULT;
1415 return 0;
1416 }
1417
1418 static int mos7720_ioctl(struct usb_serial_port *port, struct file *file,
1419 unsigned int cmd, unsigned long arg)
1420 {
1421 struct moschip_port *mos7720_port;
1422 struct async_icount cnow;
1423 struct async_icount cprev;
1424 struct serial_icounter_struct icount;
1425
1426 mos7720_port = usb_get_serial_port_data(port);
1427 if (mos7720_port == NULL)
1428 return -ENODEV;
1429
1430 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
1431
1432 switch (cmd) {
1433 case TIOCINQ:
1434 /* return number of bytes available */
1435 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
1436 return get_number_bytes_avail(mos7720_port,
1437 (unsigned int __user *)arg);
1438 break;
1439
1440 case TIOCSERGETLSR:
1441 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
1442 return get_lsr_info(mos7720_port, (unsigned int __user *)arg);
1443 return 0;
1444
1445 case TIOCMBIS:
1446 case TIOCMBIC:
1447 case TIOCMSET:
1448 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,
1449 port->number);
1450 return set_modem_info(mos7720_port, cmd,
1451 (unsigned int __user *)arg);
1452
1453 case TIOCMGET:
1454 dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number);
1455 return get_modem_info(mos7720_port,
1456 (unsigned int __user *)arg);
1457
1458 case TIOCGSERIAL:
1459 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
1460 return get_serial_info(mos7720_port,
1461 (struct serial_struct __user *)arg);
1462
1463 case TIOCSSERIAL:
1464 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
1465 break;
1466
1467 case TIOCMIWAIT:
1468 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
1469 cprev = mos7720_port->icount;
1470 while (1) {
1471 if (signal_pending(current))
1472 return -ERESTARTSYS;
1473 cnow = mos7720_port->icount;
1474 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1475 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1476 return -EIO; /* no change => error */
1477 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1478 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1479 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1480 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1481 return 0;
1482 }
1483 cprev = cnow;
1484 }
1485 /* NOTREACHED */
1486 break;
1487
1488 case TIOCGICOUNT:
1489 cnow = mos7720_port->icount;
1490 icount.cts = cnow.cts;
1491 icount.dsr = cnow.dsr;
1492 icount.rng = cnow.rng;
1493 icount.dcd = cnow.dcd;
1494 icount.rx = cnow.rx;
1495 icount.tx = cnow.tx;
1496 icount.frame = cnow.frame;
1497 icount.overrun = cnow.overrun;
1498 icount.parity = cnow.parity;
1499 icount.brk = cnow.brk;
1500 icount.buf_overrun = cnow.buf_overrun;
1501
1502 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,
1503 port->number, icount.rx, icount.tx );
1504 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1505 return -EFAULT;
1506 return 0;
1507 }
1508
1509 return -ENOIOCTLCMD;
1510 }
1511
1512 static int mos7720_startup(struct usb_serial *serial)
1513 {
1514 struct moschip_serial *mos7720_serial;
1515 struct moschip_port *mos7720_port;
1516 struct usb_device *dev;
1517 int i;
1518 char data;
1519
1520 dbg("%s: Entering ..........", __FUNCTION__);
1521
1522 if (!serial) {
1523 dbg("Invalid Handler");
1524 return -ENODEV;
1525 }
1526
1527 dev = serial->dev;
1528
1529 /* create our private serial structure */
1530 mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL);
1531 if (mos7720_serial == NULL) {
1532 err("%s - Out of memory", __FUNCTION__);
1533 return -ENOMEM;
1534 }
1535
1536 usb_set_serial_data(serial, mos7720_serial);
1537
1538 /* we set up the pointers to the endpoints in the mos7720_open *
1539 * function, as the structures aren't created yet. */
1540
1541 /* set up port private structures */
1542 for (i = 0; i < serial->num_ports; ++i) {
1543 mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
1544 if (mos7720_port == NULL) {
1545 err("%s - Out of memory", __FUNCTION__);
1546 usb_set_serial_data(serial, NULL);
1547 kfree(mos7720_serial);
1548 return -ENOMEM;
1549 }
1550
1551 /* Initialize all port interrupt end point to port 0 int
1552 * endpoint. Our device has only one interrupt endpoint
1553 * comman to all ports */
1554 serial->port[i]->interrupt_in_endpointAddress = serial->port[0]->interrupt_in_endpointAddress;
1555
1556 mos7720_port->port = serial->port[i];
1557 usb_set_serial_port_data(serial->port[i], mos7720_port);
1558
1559 dbg("port number is %d", serial->port[i]->number);
1560 dbg("serial number is %d", serial->minor);
1561 }
1562
1563
1564 /* setting configuration feature to one */
1565 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1566 (__u8)0x03, 0x00,0x01,0x00, NULL, 0x00, 5*HZ);
1567
1568 send_mos_cmd(serial,MOS_READ,0x00, UART_LSR, &data); // LSR For Port 1
1569 dbg("LSR:%x",data);
1570
1571 send_mos_cmd(serial,MOS_READ,0x01, UART_LSR, &data); // LSR For Port 2
1572 dbg("LSR:%x",data);
1573
1574 return 0;
1575 }
1576
1577 static void mos7720_shutdown(struct usb_serial *serial)
1578 {
1579 int i;
1580
1581 /* free private structure allocated for serial port */
1582 for (i=0; i < serial->num_ports; ++i) {
1583 kfree(usb_get_serial_port_data(serial->port[i]));
1584 usb_set_serial_port_data(serial->port[i], NULL);
1585 }
1586
1587 /* free private structure allocated for serial device */
1588 kfree(usb_get_serial_data(serial));
1589 usb_set_serial_data(serial, NULL);
1590 }
1591
1592 static struct usb_driver usb_driver = {
1593 .name = "moschip7720",
1594 .probe = usb_serial_probe,
1595 .disconnect = usb_serial_disconnect,
1596 .id_table = moschip_port_id_table,
1597 .no_dynamic_id = 1,
1598 };
1599
1600 static struct usb_serial_driver moschip7720_2port_driver = {
1601 .driver = {
1602 .owner = THIS_MODULE,
1603 .name = "moschip7720",
1604 },
1605 .description = "Moschip 2 port adapter",
1606 .usb_driver = &usb_driver,
1607 .id_table = moschip_port_id_table,
1608 .num_interrupt_in = 1,
1609 .num_bulk_in = 2,
1610 .num_bulk_out = 2,
1611 .num_ports = 2,
1612 .open = mos7720_open,
1613 .close = mos7720_close,
1614 .throttle = mos7720_throttle,
1615 .unthrottle = mos7720_unthrottle,
1616 .attach = mos7720_startup,
1617 .shutdown = mos7720_shutdown,
1618 .ioctl = mos7720_ioctl,
1619 .set_termios = mos7720_set_termios,
1620 .write = mos7720_write,
1621 .write_room = mos7720_write_room,
1622 .chars_in_buffer = mos7720_chars_in_buffer,
1623 .break_ctl = mos7720_break,
1624 .read_bulk_callback = mos7720_bulk_in_callback,
1625 .read_int_callback = mos7720_interrupt_callback,
1626 };
1627
1628 static int __init moschip7720_init(void)
1629 {
1630 int retval;
1631
1632 dbg("%s: Entering ..........", __FUNCTION__);
1633
1634 /* Register with the usb serial */
1635 retval = usb_serial_register(&moschip7720_2port_driver);
1636 if (retval)
1637 goto failed_port_device_register;
1638
1639 info(DRIVER_DESC " " DRIVER_VERSION);
1640
1641 /* Register with the usb */
1642 retval = usb_register(&usb_driver);
1643 if (retval)
1644 goto failed_usb_register;
1645
1646 return 0;
1647
1648 failed_usb_register:
1649 usb_serial_deregister(&moschip7720_2port_driver);
1650
1651 failed_port_device_register:
1652 return retval;
1653 }
1654
1655 static void __exit moschip7720_exit(void)
1656 {
1657 usb_deregister(&usb_driver);
1658 usb_serial_deregister(&moschip7720_2port_driver);
1659 }
1660
1661 module_init(moschip7720_init);
1662 module_exit(moschip7720_exit);
1663
1664 /* Module information */
1665 MODULE_AUTHOR( DRIVER_AUTHOR );
1666 MODULE_DESCRIPTION( DRIVER_DESC );
1667 MODULE_LICENSE("GPL");
1668
1669 module_param(debug, bool, S_IRUGO | S_IWUSR);
1670 MODULE_PARM_DESC(debug, "Debug enabled or not");
WRT350N Kernel Patches