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mos7720 update
[linux-2.6/zen-sources.git] / drivers / usb / serial / mos7720.c
blob6ba87e6e28c39376389698c4805f1df9df24fcbd
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 * VijayaKumar.G.N. <vijaykumar@aspirecom.net>
13 * AjayKumar <ajay@aspirecom.net>
14 * Gurudeva.N. <gurudev@aspirecom.net>
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 __u32 *data;
107 unsigned int status;
108 __u8 sp1;
109 __u8 sp2;
110 __u8 st;
111
112 dbg("%s"," : Entering\n");
113
114 if (!urb) {
115 dbg("%s","Invalid Pointer !!!!:\n");
116 return;
117 }
118
119 switch (urb->status) {
120 case 0:
121 /* success */
122 break;
123 case -ECONNRESET:
124 case -ENOENT:
125 case -ESHUTDOWN:
126 /* this urb is terminated, clean up */
127 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
128 urb->status);
129 return;
130 default:
131 dbg("%s - nonzero urb status received: %d", __FUNCTION__,
132 urb->status);
133 goto exit;
134 }
135
136 length = urb->actual_length;
137 data = urb->transfer_buffer;
138
139 /* Moschip get 4 bytes
140 * Byte 1 IIR Port 1 (port.number is 0)
141 * Byte 2 IIR Port 2 (port.number is 1)
142 * Byte 3 --------------
143 * Byte 4 FIFO status for both */
144 if (length && length > 4) {
145 dbg("Wrong data !!!");
146 return;
147 }
148
149 status = *data;
150
151 sp1 = (status & 0xff000000)>>24;
152 sp2 = (status & 0x00ff0000)>>16;
153 st = status & 0x000000ff;
154
155 if ((sp1 & 0x01) || (sp2 & 0x01)) {
156 /* No Interrupt Pending in both the ports */
157 dbg("No Interrupt !!!");
158 } else {
159 switch (sp1 & 0x0f) {
160 case SERIAL_IIR_RLS:
161 dbg("Serial Port 1: Receiver status error or address "
162 "bit detected in 9-bit mode\n");
163 break;
164 case SERIAL_IIR_CTI:
165 dbg("Serial Port 1: Receiver time out");
166 break;
167 case SERIAL_IIR_MS:
168 dbg("Serial Port 1: Modem status change");
169 break;
170 }
171
172 switch (sp2 & 0x0f) {
173 case SERIAL_IIR_RLS:
174 dbg("Serial Port 2: Receiver status error or address "
175 "bit detected in 9-bit mode");
176 break;
177 case SERIAL_IIR_CTI:
178 dbg("Serial Port 2: Receiver time out");
179 break;
180 case SERIAL_IIR_MS:
181 dbg("Serial Port 2: Modem status change");
182 break;
183 }
184 }
185
186 exit:
187 result = usb_submit_urb(urb, GFP_ATOMIC);
188 if (result)
189 dev_err(&urb->dev->dev,
190 "%s - Error %d submitting control urb\n",
191 __FUNCTION__, result);
192 return;
193 }
194
195 /*
196 * mos7720_bulk_in_callback
197 * this is the callback function for when we have received data on the
198 * bulk in endpoint.
199 */
200 static void mos7720_bulk_in_callback(struct urb *urb)
201 {
202 int status;
203 unsigned char *data ;
204 struct usb_serial_port *port;
205 struct moschip_port *mos7720_port;
206 struct tty_struct *tty;
207
208 if (urb->status) {
209 dbg("nonzero read bulk status received: %d",urb->status);
210 return;
211 }
212
213 mos7720_port = urb->context;
214 if (!mos7720_port) {
215 dbg("%s","NULL mos7720_port pointer \n");
216 return ;
217 }
218
219 port = mos7720_port->port;
220
221 dbg("Entering...%s", __FUNCTION__);
222
223 data = urb->transfer_buffer;
224
225 tty = port->tty;
226 if (tty && urb->actual_length) {
227 tty_buffer_request_room(tty, urb->actual_length);
228 tty_insert_flip_string(tty, data, urb->actual_length);
229 tty_flip_buffer_push(tty);
230 }
231
232 if (!port->read_urb) {
233 dbg("URB KILLED !!!");
234 return;
235 }
236
237 if (port->read_urb->status != -EINPROGRESS) {
238 port->read_urb->dev = port->serial->dev;
239
240 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
241 if (status)
242 dbg("usb_submit_urb(read bulk) failed, status = %d",
243 status);
244 }
245 }
246
247 /*
248 * mos7720_bulk_out_data_callback
249 * this is the callback function for when we have finished sending serial
250 * data on the bulk out endpoint.
251 */
252 static void mos7720_bulk_out_data_callback(struct urb *urb)
253 {
254 struct moschip_port *mos7720_port;
255 struct tty_struct *tty;
256
257 if (urb->status) {
258 dbg("nonzero write bulk status received:%d", urb->status);
259 return;
260 }
261
262 mos7720_port = urb->context;
263 if (!mos7720_port) {
264 dbg("NULL mos7720_port pointer");
265 return ;
266 }
267
268 dbg("Entering .........");
269
270 tty = mos7720_port->port->tty;
271
272 if (tty && mos7720_port->open)
273 tty_wakeup(tty);
274 }
275
276 /*
277 * send_mos_cmd
278 * this function will be used for sending command to device
279 */
280 static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value,
281 __u16 index, void *data)
282 {
283 int status;
284 unsigned int pipe;
285 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
286 __u8 requesttype;
287 __u16 size = 0x0000;
288
289 if (value < MOS_MAX_PORT) {
290 if (product == MOSCHIP_DEVICE_ID_7715) {
291 value = value*0x100+0x100;
292 } else {
293 value = value*0x100+0x200;
294 }
295 } else {
296 value = 0x0000;
297 if ((product == MOSCHIP_DEVICE_ID_7715) &&
298 (index != 0x08)) {
299 dbg("serial->product== MOSCHIP_DEVICE_ID_7715");
300 //index = 0x01 ;
301 }
302 }
303
304 if (request == MOS_WRITE) {
305 request = (__u8)MOS_WRITE;
306 requesttype = (__u8)0x40;
307 value = value + (__u16)*((unsigned char *)data);
308 data = NULL;
309 pipe = usb_sndctrlpipe(serial->dev, 0);
310 } else {
311 request = (__u8)MOS_READ;
312 requesttype = (__u8)0xC0;
313 size = 0x01;
314 pipe = usb_rcvctrlpipe(serial->dev,0);
315 }
316
317 status = usb_control_msg(serial->dev, pipe, request, requesttype,
318 value, index, data, size, MOS_WDR_TIMEOUT);
319
320 if (status < 0)
321 dbg("Command Write failed Value %x index %x\n",value,index);
322
323 return status;
324 }
325
326 static int mos7720_open(struct usb_serial_port *port, struct file * filp)
327 {
328 struct usb_serial *serial;
329 struct usb_serial_port *port0;
330 struct urb *urb;
331 struct moschip_serial *mos7720_serial;
332 struct moschip_port *mos7720_port;
333 int response;
334 int port_number;
335 char data;
336 int allocated_urbs = 0;
337 int j;
338
339 serial = port->serial;
340
341 mos7720_port = usb_get_serial_port_data(port);
342 if (mos7720_port == NULL)
343 return -ENODEV;
344
345 port0 = serial->port[0];
346
347 mos7720_serial = usb_get_serial_data(serial);
348
349 if (mos7720_serial == NULL || port0 == NULL)
350 return -ENODEV;
351
352 usb_clear_halt(serial->dev, port->write_urb->pipe);
353 usb_clear_halt(serial->dev, port->read_urb->pipe);
354
355 /* Initialising the write urb pool */
356 for (j = 0; j < NUM_URBS; ++j) {
357 urb = usb_alloc_urb(0,GFP_KERNEL);
358 mos7720_port->write_urb_pool[j] = urb;
359
360 if (urb == NULL) {
361 err("No more urbs???");
362 continue;
363 }
364
365 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
366 GFP_KERNEL);
367 if (!urb->transfer_buffer) {
368 err("%s-out of memory for urb buffers.", __FUNCTION__);
369 usb_free_urb(mos7720_port->write_urb_pool[j]);
370 mos7720_port->write_urb_pool[j] = NULL;
371 continue;
372 }
373 allocated_urbs++;
374 }
375
376 if (!allocated_urbs)
377 return -ENOMEM;
378
379 /* Initialize MCS7720 -- Write Init values to corresponding Registers
380 *
381 * Register Index
382 * 1 : IER
383 * 2 : FCR
384 * 3 : LCR
385 * 4 : MCR
386 *
387 * 0x08 : SP1/2 Control Reg
388 */
389 port_number = port->number - port->serial->minor;
390 send_mos_cmd(port->serial, MOS_READ, port_number, UART_LSR, &data);
391 dbg("SS::%p LSR:%x\n",mos7720_port, data);
392
393 dbg("Check:Sending Command ..........");
394
395 data = 0x02;
396 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x01, &data);
397 data = 0x02;
398 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x02, &data);
399
400 data = 0x00;
401 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
402 data = 0x00;
403 send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
404
405 data = 0xCF;
406 send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
407 data = 0x03;
408 mos7720_port->shadowLCR = data;
409 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
410 data = 0x0b;
411 mos7720_port->shadowMCR = data;
412 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
413 data = 0x0b;
414 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
415
416 data = 0x00;
417 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
418 data = 0x00;
419 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
420
421 /* data = 0x00;
422 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, port_number + 1, &data);
423 data = 0x03;
424 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
425 data = 0x00;
426 send_mos_cmd(port->serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
427 */
428 data = 0x00;
429 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
430
431 data = data | (port->number - port->serial->minor + 1);
432 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
433
434 data = 0x83;
435 mos7720_port->shadowLCR = data;
436 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
437 data = 0x0c;
438 send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
439 data = 0x00;
440 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
441 data = 0x03;
442 mos7720_port->shadowLCR = data;
443 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
444 data = 0x0c;
445 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
446 data = 0x0c;
447 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
448
449 //Matrix
450
451 /* force low_latency on so that our tty_push actually forces *
452 * the data through,otherwise it is scheduled, and with *
453 * high data rates (like with OHCI) data can get lost. */
454
455 if (port->tty)
456 port->tty->low_latency = 1;
457
458 /* see if we've set up our endpoint info yet *
459 * (can't set it up in mos7720_startup as the *
460 * structures were not set up at that time.) */
461 if (!mos7720_serial->interrupt_started) {
462 dbg("Interrupt buffer NULL !!!");
463
464 /* not set up yet, so do it now */
465 mos7720_serial->interrupt_started = 1;
466
467 dbg("To Submit URB !!!");
468
469 /* set up our interrupt urb */
470 usb_fill_int_urb(port0->interrupt_in_urb, serial->dev,
471 usb_rcvintpipe(serial->dev,
472 port->interrupt_in_endpointAddress),
473 port0->interrupt_in_buffer,
474 port0->interrupt_in_urb->transfer_buffer_length,
475 mos7720_interrupt_callback, mos7720_port,
476 port0->interrupt_in_urb->interval);
477
478 /* start interrupt read for this mos7720 this interrupt *
479 * will continue as long as the mos7720 is connected */
480 dbg("Submit URB over !!!");
481 response = usb_submit_urb(port0->interrupt_in_urb, GFP_KERNEL);
482 if (response)
483 dev_err(&port->dev,
484 "%s - Error %d submitting control urb",
485 __FUNCTION__, response);
486 }
487
488 /* set up our bulk in urb */
489 usb_fill_bulk_urb(port->read_urb, serial->dev,
490 usb_rcvbulkpipe(serial->dev,
491 port->bulk_in_endpointAddress),
492 port->bulk_in_buffer,
493 port->read_urb->transfer_buffer_length,
494 mos7720_bulk_in_callback, mos7720_port);
495 response = usb_submit_urb(port->read_urb, GFP_KERNEL);
496 if (response)
497 dev_err(&port->dev,
498 "%s - Error %d submitting read urb", __FUNCTION__, response);
499
500 /* initialize our icount structure */
501 memset(&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount));
502
503 /* initialize our port settings */
504 mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */
505
506 /* send a open port command */
507 mos7720_port->open = 1;
508
509 return 0;
510 }
511
512 /*
513 * mos7720_chars_in_buffer
514 * this function is called by the tty driver when it wants to know how many
515 * bytes of data we currently have outstanding in the port (data that has
516 * been written, but hasn't made it out the port yet)
517 * If successful, we return the number of bytes left to be written in the
518 * system,
519 * Otherwise we return a negative error number.
520 */
521 static int mos7720_chars_in_buffer(struct usb_serial_port *port)
522 {
523 int i;
524 int chars = 0;
525 struct moschip_port *mos7720_port;
526
527 dbg("%s:entering ...........", __FUNCTION__);
528
529 mos7720_port = usb_get_serial_port_data(port);
530 if (mos7720_port == NULL) {
531 dbg("%s:leaving ...........", __FUNCTION__);
532 return -ENODEV;
533 }
534
535 for (i = 0; i < NUM_URBS; ++i) {
536 if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status == -EINPROGRESS)
537 chars += URB_TRANSFER_BUFFER_SIZE;
538 }
539 dbg("%s - returns %d", __FUNCTION__, chars);
540 return chars;
541 }
542
543 static void mos7720_close(struct usb_serial_port *port, struct file *filp)
544 {
545 struct usb_serial *serial;
546 struct moschip_port *mos7720_port;
547 char data;
548 int j;
549
550 dbg("mos7720_close:entering...");
551
552 serial = port->serial;
553
554 mos7720_port = usb_get_serial_port_data(port);
555 if (mos7720_port == NULL)
556 return;
557
558 for (j = 0; j < NUM_URBS; ++j)
559 usb_kill_urb(mos7720_port->write_urb_pool[j]);
560
561 /* Freeing Write URBs */
562 for (j = 0; j < NUM_URBS; ++j) {
563 if (mos7720_port->write_urb_pool[j]) {
564 kfree(mos7720_port->write_urb_pool[j]->transfer_buffer);
565 usb_free_urb(mos7720_port->write_urb_pool[j]);
566 }
567 }
568
569 /* While closing port, shutdown all bulk read, write *
570 * and interrupt read if they exists */
571 if (serial->dev) {
572 dbg("Shutdown bulk write");
573 usb_kill_urb(port->write_urb);
574 dbg("Shutdown bulk read");
575 usb_kill_urb(port->read_urb);
576 }
577
578 data = 0x00;
579 send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
580 0x04, &data);
581
582 data = 0x00;
583 send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
584 0x01, &data);
585
586 mos7720_port->open = 0;
587
588 dbg("Leaving %s", __FUNCTION__);
589 }
590
591 static void mos7720_break(struct usb_serial_port *port, int break_state)
592 {
593 unsigned char data;
594 struct usb_serial *serial;
595 struct moschip_port *mos7720_port;
596
597 dbg("Entering %s", __FUNCTION__);
598
599 serial = port->serial;
600
601 mos7720_port = usb_get_serial_port_data(port);
602 if (mos7720_port == NULL)
603 return;
604
605 if (break_state == -1)
606 data = mos7720_port->shadowLCR | UART_LCR_SBC;
607 else
608 data = mos7720_port->shadowLCR & ~UART_LCR_SBC;
609
610 mos7720_port->shadowLCR = data;
611 send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
612 0x03, &data);
613
614 return;
615 }
616
617 /*
618 * mos7720_write_room
619 * this function is called by the tty driver when it wants to know how many
620 * bytes of data we can accept for a specific port.
621 * If successful, we return the amount of room that we have for this port
622 * Otherwise we return a negative error number.
623 */
624 static int mos7720_write_room(struct usb_serial_port *port)
625 {
626 struct moschip_port *mos7720_port;
627 int room = 0;
628 int i;
629
630 dbg("%s:entering ...........", __FUNCTION__);
631
632 mos7720_port = usb_get_serial_port_data(port);
633 if (mos7720_port == NULL) {
634 dbg("%s:leaving ...........", __FUNCTION__);
635 return -ENODEV;
636 }
637
638 for (i = 0; i < NUM_URBS; ++i) {
639 if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
640 room += URB_TRANSFER_BUFFER_SIZE;
641 }
642
643 dbg("%s - returns %d", __FUNCTION__, room);
644 return room;
645 }
646
647 static int mos7720_write(struct usb_serial_port *port,
648 const unsigned char *data, int count)
649 {
650 int status;
651 int i;
652 int bytes_sent = 0;
653 int transfer_size;
654
655 struct moschip_port *mos7720_port;
656 struct usb_serial *serial;
657 struct urb *urb;
658 const unsigned char *current_position = data;
659
660 dbg("%s:entering ...........", __FUNCTION__);
661
662 serial = port->serial;
663
664 mos7720_port = usb_get_serial_port_data(port);
665 if (mos7720_port == NULL) {
666 dbg("mos7720_port is NULL");
667 return -ENODEV;
668 }
669
670 /* try to find a free urb in the list */
671 urb = NULL;
672
673 for (i = 0; i < NUM_URBS; ++i) {
674 if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) {
675 urb = mos7720_port->write_urb_pool[i];
676 dbg("URB:%d",i);
677 break;
678 }
679 }
680
681 if (urb == NULL) {
682 dbg("%s - no more free urbs", __FUNCTION__);
683 goto exit;
684 }
685
686 if (urb->transfer_buffer == NULL) {
687 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
688 GFP_KERNEL);
689 if (urb->transfer_buffer == NULL) {
690 err("%s no more kernel memory...", __FUNCTION__);
691 goto exit;
692 }
693 }
694 transfer_size = min (count, URB_TRANSFER_BUFFER_SIZE);
695
696 memcpy(urb->transfer_buffer, current_position, transfer_size);
697 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size,
698 urb->transfer_buffer);
699
700 /* fill urb with data and submit */
701 usb_fill_bulk_urb(urb, serial->dev,
702 usb_sndbulkpipe(serial->dev,
703 port->bulk_out_endpointAddress),
704 urb->transfer_buffer, transfer_size,
705 mos7720_bulk_out_data_callback, mos7720_port);
706
707 /* send it down the pipe */
708 status = usb_submit_urb(urb,GFP_ATOMIC);
709 if (status) {
710 err("%s - usb_submit_urb(write bulk) failed with status = %d",
711 __FUNCTION__, status);
712 bytes_sent = status;
713 goto exit;
714 }
715 bytes_sent = transfer_size;
716
717 exit:
718 return bytes_sent;
719 }
720
721 static void mos7720_throttle(struct usb_serial_port *port)
722 {
723 struct moschip_port *mos7720_port;
724 struct tty_struct *tty;
725 int status;
726
727 dbg("%s- port %d\n", __FUNCTION__, port->number);
728
729 mos7720_port = usb_get_serial_port_data(port);
730
731 if (mos7720_port == NULL)
732 return;
733
734 if (!mos7720_port->open) {
735 dbg("port not opened");
736 return;
737 }
738
739 dbg("%s: Entering ..........", __FUNCTION__);
740
741 tty = port->tty;
742 if (!tty) {
743 dbg("%s - no tty available", __FUNCTION__);
744 return;
745 }
746
747 /* if we are implementing XON/XOFF, send the stop character */
748 if (I_IXOFF(tty)) {
749 unsigned char stop_char = STOP_CHAR(tty);
750 status = mos7720_write(port, &stop_char, 1);
751 if (status <= 0)
752 return;
753 }
754
755 /* if we are implementing RTS/CTS, toggle that line */
756 if (tty->termios->c_cflag & CRTSCTS) {
757 mos7720_port->shadowMCR &= ~UART_MCR_RTS;
758 status = send_mos_cmd(port->serial, MOS_WRITE,
759 port->number - port->serial->minor,
760 UART_MCR, &mos7720_port->shadowMCR);
761 if (status != 0)
762 return;
763 }
764 }
765
766 static void mos7720_unthrottle(struct usb_serial_port *port)
767 {
768 struct tty_struct *tty;
769 int status;
770 struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
771
772 if (mos7720_port == NULL)
773 return;
774
775 if (!mos7720_port->open) {
776 dbg("%s - port not opened", __FUNCTION__);
777 return;
778 }
779
780 dbg("%s: Entering ..........", __FUNCTION__);
781
782 tty = port->tty;
783 if (!tty) {
784 dbg("%s - no tty available", __FUNCTION__);
785 return;
786 }
787
788 /* if we are implementing XON/XOFF, send the start character */
789 if (I_IXOFF(tty)) {
790 unsigned char start_char = START_CHAR(tty);
791 status = mos7720_write(port, &start_char, 1);
792 if (status <= 0)
793 return;
794 }
795
796 /* if we are implementing RTS/CTS, toggle that line */
797 if (tty->termios->c_cflag & CRTSCTS) {
798 mos7720_port->shadowMCR |= UART_MCR_RTS;
799 status = send_mos_cmd(port->serial, MOS_WRITE,
800 port->number - port->serial->minor,
801 UART_MCR, &mos7720_port->shadowMCR);
802 if (status != 0)
803 return;
804 }
805 }
806
807 static int set_higher_rates(struct moschip_port *mos7720_port,
808 unsigned int baud)
809 {
810 unsigned char data;
811 struct usb_serial_port *port;
812 struct usb_serial *serial;
813 int port_number;
814
815 if (mos7720_port == NULL)
816 return -EINVAL;
817
818 port = mos7720_port->port;
819 serial = port->serial;
820
821 /***********************************************
822 * Init Sequence for higher rates
823 ***********************************************/
824 dbg("Sending Setting Commands ..........");
825 port_number = port->number - port->serial->minor;
826
827 data = 0x000;
828 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
829 data = 0x000;
830 send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
831 data = 0x0CF;
832 send_mos_cmd(serial, MOS_WRITE, port->number, 0x02, &data);
833 data = 0x00b;
834 mos7720_port->shadowMCR = data;
835 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
836 data = 0x00b;
837 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
838
839 data = 0x000;
840 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
841 data = 0x000;
842 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
843
844
845 /***********************************************
846 * Set for higher rates *
847 ***********************************************/
848
849 data = baud * 0x10;
850 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1,&data);
851
852 data = 0x003;
853 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
854 data = 0x003;
855 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
856
857 data = 0x02b;
858 mos7720_port->shadowMCR = data;
859 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
860 data = 0x02b;
861 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
862
863 /***********************************************
864 * Set DLL/DLM
865 ***********************************************/
866
867 data = mos7720_port->shadowLCR | UART_LCR_DLAB;
868 mos7720_port->shadowLCR = data;
869 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
870
871 data = 0x001; /* DLL */
872 send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
873 data = 0x000; /* DLM */
874 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
875
876 data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
877 mos7720_port->shadowLCR = data;
878 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
879
880 return 0;
881 }
882
883 /* baud rate information */
884 struct divisor_table_entry
885 {
886 __u32 baudrate;
887 __u16 divisor;
888 };
889
890 /* Define table of divisors for moschip 7720 hardware *
891 * These assume a 3.6864MHz crystal, the standard /16, and *
892 * MCR.7 = 0. */
893 static struct divisor_table_entry divisor_table[] = {
894 { 50, 2304},
895 { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */
896 { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */
897 { 150, 768},
898 { 300, 384},
899 { 600, 192},
900 { 1200, 96},
901 { 1800, 64},
902 { 2400, 48},
903 { 4800, 24},
904 { 7200, 16},
905 { 9600, 12},
906 { 19200, 6},
907 { 38400, 3},
908 { 57600, 2},
909 { 115200, 1},
910 };
911
912 /*****************************************************************************
913 * calc_baud_rate_divisor
914 * this function calculates the proper baud rate divisor for the specified
915 * baud rate.
916 *****************************************************************************/
917 static int calc_baud_rate_divisor(int baudrate, int *divisor)
918 {
919 int i;
920 __u16 custom;
921 __u16 round1;
922 __u16 round;
923
924
925 dbg("%s - %d", __FUNCTION__, baudrate);
926
927 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
928 if (divisor_table[i].baudrate == baudrate) {
929 *divisor = divisor_table[i].divisor;
930 return 0;
931 }
932 }
933
934 /* After trying for all the standard baud rates *
935 * Try calculating the divisor for this baud rate */
936 if (baudrate > 75 && baudrate < 230400) {
937 /* get the divisor */
938 custom = (__u16)(230400L / baudrate);
939
940 /* Check for round off */
941 round1 = (__u16)(2304000L / baudrate);
942 round = (__u16)(round1 - (custom * 10));
943 if (round > 4)
944 custom++;
945 *divisor = custom;
946
947 dbg("Baud %d = %d",baudrate, custom);
948 return 0;
949 }
950
951 dbg("Baud calculation Failed...");
952 return -EINVAL;
953 }
954
955 /*
956 * send_cmd_write_baud_rate
957 * this function sends the proper command to change the baud rate of the
958 * specified port.
959 */
960 static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port,
961 int baudrate)
962 {
963 struct usb_serial_port *port;
964 struct usb_serial *serial;
965 int divisor;
966 int status;
967 unsigned char data;
968 unsigned char number;
969
970 if (mos7720_port == NULL)
971 return -1;
972
973 port = mos7720_port->port;
974 serial = port->serial;
975
976 dbg("%s: Entering ..........", __FUNCTION__);
977
978 number = port->number - port->serial->minor;
979 dbg("%s - port = %d, baud = %d", __FUNCTION__, port->number, baudrate);
980
981 /* Calculate the Divisor */
982 status = calc_baud_rate_divisor(baudrate, &divisor);
983 if (status) {
984 err("%s - bad baud rate", __FUNCTION__);
985 return status;
986 }
987
988 /* Enable access to divisor latch */
989 data = mos7720_port->shadowLCR | UART_LCR_DLAB;
990 mos7720_port->shadowLCR = data;
991 send_mos_cmd(serial, MOS_WRITE, number, UART_LCR, &data);
992
993 /* Write the divisor */
994 data = ((unsigned char)(divisor & 0xff));
995 send_mos_cmd(serial, MOS_WRITE, number, 0x00, &data);
996
997 data = ((unsigned char)((divisor & 0xff00) >> 8));
998 send_mos_cmd(serial, MOS_WRITE, number, 0x01, &data);
999
1000 /* Disable access to divisor latch */
1001 data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
1002 mos7720_port->shadowLCR = data;
1003 send_mos_cmd(serial, MOS_WRITE, number, 0x03, &data);
1004
1005 return status;
1006 }
1007
1008 /*
1009 * change_port_settings
1010 * This routine is called to set the UART on the device to match
1011 * the specified new settings.
1012 */
1013 static void change_port_settings(struct moschip_port *mos7720_port,
1014 struct ktermios *old_termios)
1015 {
1016 struct usb_serial_port *port;
1017 struct usb_serial *serial;
1018 struct tty_struct *tty;
1019 int baud;
1020 unsigned cflag;
1021 unsigned iflag;
1022 __u8 mask = 0xff;
1023 __u8 lData;
1024 __u8 lParity;
1025 __u8 lStop;
1026 int status;
1027 int port_number;
1028 char data;
1029
1030 if (mos7720_port == NULL)
1031 return ;
1032
1033 port = mos7720_port->port;
1034 serial = port->serial;
1035 port_number = port->number - port->serial->minor;
1036
1037 dbg("%s - port %d", __FUNCTION__, port->number);
1038
1039 if (!mos7720_port->open) {
1040 dbg("%s - port not opened", __FUNCTION__);
1041 return;
1042 }
1043
1044 tty = mos7720_port->port->tty;
1045
1046 if ((!tty) || (!tty->termios)) {
1047 dbg("%s - no tty structures", __FUNCTION__);
1048 return;
1049 }
1050
1051 dbg("%s: Entering ..........", __FUNCTION__);
1052
1053 lData = UART_LCR_WLEN8;
1054 lStop = 0x00; /* 1 stop bit */
1055 lParity = 0x00; /* No parity */
1056
1057 cflag = tty->termios->c_cflag;
1058 iflag = tty->termios->c_iflag;
1059
1060 /* Change the number of bits */
1061 switch (cflag & CSIZE) {
1062 case CS5:
1063 lData = UART_LCR_WLEN5;
1064 mask = 0x1f;
1065 break;
1066
1067 case CS6:
1068 lData = UART_LCR_WLEN6;
1069 mask = 0x3f;
1070 break;
1071
1072 case CS7:
1073 lData = UART_LCR_WLEN7;
1074 mask = 0x7f;
1075 break;
1076 default:
1077 case CS8:
1078 lData = UART_LCR_WLEN8;
1079 break;
1080 }
1081
1082 /* Change the Parity bit */
1083 if (cflag & PARENB) {
1084 if (cflag & PARODD) {
1085 lParity = UART_LCR_PARITY;
1086 dbg("%s - parity = odd", __FUNCTION__);
1087 } else {
1088 lParity = (UART_LCR_EPAR | UART_LCR_PARITY);
1089 dbg("%s - parity = even", __FUNCTION__);
1090 }
1091
1092 } else {
1093 dbg("%s - parity = none", __FUNCTION__);
1094 }
1095
1096 if (cflag & CMSPAR)
1097 lParity = lParity | 0x20;
1098
1099 /* Change the Stop bit */
1100 if (cflag & CSTOPB) {
1101 lStop = UART_LCR_STOP;
1102 dbg("%s - stop bits = 2", __FUNCTION__);
1103 } else {
1104 lStop = 0x00;
1105 dbg("%s - stop bits = 1", __FUNCTION__);
1106 }
1107
1108 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
1109 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
1110 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
1111
1112 /* Update the LCR with the correct value */
1113 mos7720_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1114 mos7720_port->shadowLCR |= (lData | lParity | lStop);
1115
1116
1117 /* Disable Interrupts */
1118 data = 0x00;
1119 send_mos_cmd(serial,MOS_WRITE,port->number - port->serial->minor, UART_IER, &data);
1120
1121 data = 0x00;
1122 send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
1123
1124 data = 0xcf;
1125 send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
1126
1127 /* Send the updated LCR value to the mos7720 */
1128 data = mos7720_port->shadowLCR;
1129 send_mos_cmd(serial, MOS_WRITE, port_number, UART_LCR, &data);
1130
1131 data = 0x00b;
1132 mos7720_port->shadowMCR = data;
1133 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
1134 data = 0x00b;
1135 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
1136
1137 /* set up the MCR register and send it to the mos7720 */
1138 mos7720_port->shadowMCR = UART_MCR_OUT2;
1139 if (cflag & CBAUD)
1140 mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS);
1141
1142 if (cflag & CRTSCTS) {
1143 mos7720_port->shadowMCR |= (UART_MCR_XONANY);
1144
1145 /* To set hardware flow control to the specified *
1146 * serial port, in SP1/2_CONTROL_REG */
1147 if (port->number) {
1148 data = 0x001;
1149 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
1150 0x08, &data);
1151 } else {
1152 data = 0x002;
1153 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
1154 0x08, &data);
1155 }
1156 } else {
1157 mos7720_port->shadowMCR &= ~(UART_MCR_XONANY);
1158 }
1159
1160 data = mos7720_port->shadowMCR;
1161 send_mos_cmd(serial, MOS_WRITE, port_number, UART_MCR, &data);
1162
1163 /* Determine divisor based on baud rate */
1164 baud = tty_get_baud_rate(tty);
1165 if (!baud) {
1166 /* pick a default, any default... */
1167 dbg("Picked default baud...");
1168 baud = 9600;
1169 }
1170
1171 if (baud >= 230400) {
1172 set_higher_rates(mos7720_port, baud);
1173 /* Enable Interrupts */
1174 data = 0x0c;
1175 send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
1176 return;
1177 }
1178
1179 dbg("%s - baud rate = %d", __FUNCTION__, baud);
1180 status = send_cmd_write_baud_rate(mos7720_port, baud);
1181
1182 /* Enable Interrupts */
1183 data = 0x0c;
1184 send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
1185
1186 if (port->read_urb->status != -EINPROGRESS) {
1187 port->read_urb->dev = serial->dev;
1188
1189 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1190 if (status)
1191 dbg("usb_submit_urb(read bulk) failed, status = %d",
1192 status);
1193 }
1194 return;
1195 }
1196
1197 /*
1198 * mos7720_set_termios
1199 * this function is called by the tty driver when it wants to change the
1200 * termios structure.
1201 */
1202 static void mos7720_set_termios(struct usb_serial_port *port,
1203 struct ktermios *old_termios)
1204 {
1205 int status;
1206 unsigned int cflag;
1207 struct usb_serial *serial;
1208 struct moschip_port *mos7720_port;
1209 struct tty_struct *tty;
1210
1211 serial = port->serial;
1212
1213 mos7720_port = usb_get_serial_port_data(port);
1214
1215 if (mos7720_port == NULL)
1216 return;
1217
1218 tty = port->tty;
1219
1220 if (!port->tty || !port->tty->termios) {
1221 dbg("%s - no tty or termios", __FUNCTION__);
1222 return;
1223 }
1224
1225 if (!mos7720_port->open) {
1226 dbg("%s - port not opened", __FUNCTION__);
1227 return;
1228 }
1229
1230 dbg("%s\n","setting termios - ASPIRE");
1231
1232 cflag = tty->termios->c_cflag;
1233
1234 if (!cflag) {
1235 printk("%s %s\n",__FUNCTION__,"cflag is NULL");
1236 return;
1237 }
1238
1239 /* check that they really want us to change something */
1240 if (old_termios) {
1241 if ((cflag == old_termios->c_cflag) &&
1242 (RELEVANT_IFLAG(tty->termios->c_iflag) ==
1243 RELEVANT_IFLAG(old_termios->c_iflag))) {
1244 dbg("Nothing to change");
1245 return;
1246 }
1247 }
1248
1249 dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
1250 tty->termios->c_cflag,
1251 RELEVANT_IFLAG(tty->termios->c_iflag));
1252
1253 if (old_termios)
1254 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
1255 old_termios->c_cflag,
1256 RELEVANT_IFLAG(old_termios->c_iflag));
1257
1258 dbg("%s - port %d", __FUNCTION__, port->number);
1259
1260 /* change the port settings to the new ones specified */
1261 change_port_settings(mos7720_port, old_termios);
1262
1263 if(!port->read_urb) {
1264 dbg("%s","URB KILLED !!!!!\n");
1265 return;
1266 }
1267
1268 if(port->read_urb->status != -EINPROGRESS) {
1269 port->read_urb->dev = serial->dev;
1270 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1271 if (status)
1272 dbg("usb_submit_urb(read bulk) failed, status = %d",
1273 status);
1274 }
1275 return;
1276 }
1277
1278 /*
1279 * get_lsr_info - get line status register info
1280 *
1281 * Purpose: Let user call ioctl() to get info when the UART physically
1282 * is emptied. On bus types like RS485, the transmitter must
1283 * release the bus after transmitting. This must be done when
1284 * the transmit shift register is empty, not be done when the
1285 * transmit holding register is empty. This functionality
1286 * allows an RS485 driver to be written in user space.
1287 */
1288 static int get_lsr_info(struct moschip_port *mos7720_port,
1289 unsigned int __user *value)
1290 {
1291 int count;
1292 unsigned int result = 0;
1293
1294 count = mos7720_chars_in_buffer(mos7720_port->port);
1295 if (count == 0) {
1296 dbg("%s -- Empty", __FUNCTION__);
1297 result = TIOCSER_TEMT;
1298 }
1299
1300 if (copy_to_user(value, &result, sizeof(int)))
1301 return -EFAULT;
1302 return 0;
1303 }
1304
1305 /*
1306 * get_number_bytes_avail - get number of bytes available
1307 *
1308 * Purpose: Let user call ioctl to get the count of number of bytes available.
1309 */
1310 static int get_number_bytes_avail(struct moschip_port *mos7720_port,
1311 unsigned int __user *value)
1312 {
1313 unsigned int result = 0;
1314 struct tty_struct *tty = mos7720_port->port->tty;
1315
1316 if (!tty)
1317 return -ENOIOCTLCMD;
1318
1319 result = tty->read_cnt;
1320
1321 dbg("%s(%d) = %d", __FUNCTION__, mos7720_port->port->number, result);
1322 if (copy_to_user(value, &result, sizeof(int)))
1323 return -EFAULT;
1324
1325 return -ENOIOCTLCMD;
1326 }
1327
1328 static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
1329 unsigned int __user *value)
1330 {
1331 unsigned int mcr ;
1332 unsigned int arg;
1333 unsigned char data;
1334
1335 struct usb_serial_port *port;
1336
1337 if (mos7720_port == NULL)
1338 return -1;
1339
1340 port = (struct usb_serial_port*)mos7720_port->port;
1341 mcr = mos7720_port->shadowMCR;
1342
1343 if (copy_from_user(&arg, value, sizeof(int)))
1344 return -EFAULT;
1345
1346 switch (cmd) {
1347 case TIOCMBIS:
1348 if (arg & TIOCM_RTS)
1349 mcr |= UART_MCR_RTS;
1350 if (arg & TIOCM_DTR)
1351 mcr |= UART_MCR_RTS;
1352 if (arg & TIOCM_LOOP)
1353 mcr |= UART_MCR_LOOP;
1354 break;
1355
1356 case TIOCMBIC:
1357 if (arg & TIOCM_RTS)
1358 mcr &= ~UART_MCR_RTS;
1359 if (arg & TIOCM_DTR)
1360 mcr &= ~UART_MCR_RTS;
1361 if (arg & TIOCM_LOOP)
1362 mcr &= ~UART_MCR_LOOP;
1363 break;
1364
1365 case TIOCMSET:
1366 /* turn off the RTS and DTR and LOOPBACK
1367 * and then only turn on what was asked to */
1368 mcr &= ~(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_LOOP);
1369 mcr |= ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0);
1370 mcr |= ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0);
1371 mcr |= ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0);
1372 break;
1373 }
1374
1375 mos7720_port->shadowMCR = mcr;
1376
1377 data = mos7720_port->shadowMCR;
1378 send_mos_cmd(port->serial, MOS_WRITE,
1379 port->number - port->serial->minor, UART_MCR, &data);
1380
1381 return 0;
1382 }
1383
1384 static int get_modem_info(struct moschip_port *mos7720_port,
1385 unsigned int __user *value)
1386 {
1387 unsigned int result = 0;
1388 unsigned int msr = mos7720_port->shadowMSR;
1389 unsigned int mcr = mos7720_port->shadowMCR;
1390
1391 result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1392 | ((mcr & UART_MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1393 | ((msr & UART_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1394 | ((msr & UART_MSR_DCD) ? TIOCM_CAR: 0) /* 0x040 */
1395 | ((msr & UART_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1396 | ((msr & UART_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1397
1398
1399 dbg("%s -- %x", __FUNCTION__, result);
1400
1401 if (copy_to_user(value, &result, sizeof(int)))
1402 return -EFAULT;
1403 return 0;
1404 }
1405
1406 static int get_serial_info(struct moschip_port *mos7720_port,
1407 struct serial_struct __user *retinfo)
1408 {
1409 struct serial_struct tmp;
1410
1411 if (!retinfo)
1412 return -EFAULT;
1413
1414 memset(&tmp, 0, sizeof(tmp));
1415
1416 tmp.type = PORT_16550A;
1417 tmp.line = mos7720_port->port->serial->minor;
1418 tmp.port = mos7720_port->port->number;
1419 tmp.irq = 0;
1420 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1421 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
1422 tmp.baud_base = 9600;
1423 tmp.close_delay = 5*HZ;
1424 tmp.closing_wait = 30*HZ;
1425
1426 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1427 return -EFAULT;
1428 return 0;
1429 }
1430
1431 static int mos7720_ioctl(struct usb_serial_port *port, struct file *file,
1432 unsigned int cmd, unsigned long arg)
1433 {
1434 struct moschip_port *mos7720_port;
1435 struct async_icount cnow;
1436 struct async_icount cprev;
1437 struct serial_icounter_struct icount;
1438
1439 mos7720_port = usb_get_serial_port_data(port);
1440 if (mos7720_port == NULL)
1441 return -ENODEV;
1442
1443 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
1444
1445 switch (cmd) {
1446 case TIOCINQ:
1447 /* return number of bytes available */
1448 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
1449 return get_number_bytes_avail(mos7720_port,
1450 (unsigned int __user *)arg);
1451 break;
1452
1453 case TIOCSERGETLSR:
1454 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
1455 return get_lsr_info(mos7720_port, (unsigned int __user *)arg);
1456 return 0;
1457
1458 case TIOCMBIS:
1459 case TIOCMBIC:
1460 case TIOCMSET:
1461 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,
1462 port->number);
1463 return set_modem_info(mos7720_port, cmd,
1464 (unsigned int __user *)arg);
1465
1466 case TIOCMGET:
1467 dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number);
1468 return get_modem_info(mos7720_port,
1469 (unsigned int __user *)arg);
1470
1471 case TIOCGSERIAL:
1472 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
1473 return get_serial_info(mos7720_port,
1474 (struct serial_struct __user *)arg);
1475
1476 case TIOCSSERIAL:
1477 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
1478 break;
1479
1480 case TIOCMIWAIT:
1481 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
1482 cprev = mos7720_port->icount;
1483 while (1) {
1484 if (signal_pending(current))
1485 return -ERESTARTSYS;
1486 cnow = mos7720_port->icount;
1487 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1488 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1489 return -EIO; /* no change => error */
1490 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1491 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1492 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1493 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1494 return 0;
1495 }
1496 cprev = cnow;
1497 }
1498 /* NOTREACHED */
1499 break;
1500
1501 case TIOCGICOUNT:
1502 cnow = mos7720_port->icount;
1503 icount.cts = cnow.cts;
1504 icount.dsr = cnow.dsr;
1505 icount.rng = cnow.rng;
1506 icount.dcd = cnow.dcd;
1507 icount.rx = cnow.rx;
1508 icount.tx = cnow.tx;
1509 icount.frame = cnow.frame;
1510 icount.overrun = cnow.overrun;
1511 icount.parity = cnow.parity;
1512 icount.brk = cnow.brk;
1513 icount.buf_overrun = cnow.buf_overrun;
1514
1515 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,
1516 port->number, icount.rx, icount.tx );
1517 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1518 return -EFAULT;
1519 return 0;
1520 }
1521
1522 return -ENOIOCTLCMD;
1523 }
1524
1525 static int mos7720_startup(struct usb_serial *serial)
1526 {
1527 struct moschip_serial *mos7720_serial;
1528 struct moschip_port *mos7720_port;
1529 struct usb_device *dev;
1530 int i;
1531 char data;
1532
1533 dbg("%s: Entering ..........", __FUNCTION__);
1534
1535 if (!serial) {
1536 dbg("Invalid Handler");
1537 return -ENODEV;
1538 }
1539
1540 dev = serial->dev;
1541
1542 /* create our private serial structure */
1543 mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL);
1544 if (mos7720_serial == NULL) {
1545 err("%s - Out of memory", __FUNCTION__);
1546 return -ENOMEM;
1547 }
1548
1549 usb_set_serial_data(serial, mos7720_serial);
1550
1551 /* we set up the pointers to the endpoints in the mos7720_open *
1552 * function, as the structures aren't created yet. */
1553
1554 /* set up port private structures */
1555 for (i = 0; i < serial->num_ports; ++i) {
1556 mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
1557 if (mos7720_port == NULL) {
1558 err("%s - Out of memory", __FUNCTION__);
1559 usb_set_serial_data(serial, NULL);
1560 kfree(mos7720_serial);
1561 return -ENOMEM;
1562 }
1563
1564 /* Initialize all port interrupt end point to port 0 int
1565 * endpoint. Our device has only one interrupt endpoint
1566 * comman to all ports */
1567 serial->port[i]->interrupt_in_endpointAddress = serial->port[0]->interrupt_in_endpointAddress;
1568
1569 mos7720_port->port = serial->port[i];
1570 usb_set_serial_port_data(serial->port[i], mos7720_port);
1571
1572 dbg("port number is %d", serial->port[i]->number);
1573 dbg("serial number is %d", serial->minor);
1574 }
1575
1576
1577 /* setting configuration feature to one */
1578 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1579 (__u8)0x03, 0x00,0x01,0x00, NULL, 0x00, 5*HZ);
1580
1581 send_mos_cmd(serial,MOS_READ,0x00, UART_LSR, &data); // LSR For Port 1
1582 dbg("LSR:%x",data);
1583
1584 send_mos_cmd(serial,MOS_READ,0x01, UART_LSR, &data); // LSR For Port 2
1585 dbg("LSR:%x",data);
1586
1587 return 0;
1588 }
1589
1590 static void mos7720_shutdown(struct usb_serial *serial)
1591 {
1592 int i;
1593
1594 /* free private structure allocated for serial port */
1595 for (i=0; i < serial->num_ports; ++i) {
1596 kfree(usb_get_serial_port_data(serial->port[i]));
1597 usb_set_serial_port_data(serial->port[i], NULL);
1598 }
1599
1600 /* free private structure allocated for serial device */
1601 kfree(usb_get_serial_data(serial));
1602 usb_set_serial_data(serial, NULL);
1603 }
1604
1605 static struct usb_driver usb_driver = {
1606 .name = "moschip7720",
1607 .probe = usb_serial_probe,
1608 .disconnect = usb_serial_disconnect,
1609 .id_table = moschip_port_id_table,
1610 .no_dynamic_id = 1,
1611 };
1612
1613 static struct usb_serial_driver moschip7720_2port_driver = {
1614 .driver = {
1615 .owner = THIS_MODULE,
1616 .name = "moschip7720",
1617 },
1618 .description = "Moschip 2 port adapter",
1619 .usb_driver = &usb_driver,
1620 .id_table = moschip_port_id_table,
1621 .num_interrupt_in = 1,
1622 .num_bulk_in = 2,
1623 .num_bulk_out = 2,
1624 .num_ports = 2,
1625 .open = mos7720_open,
1626 .close = mos7720_close,
1627 .throttle = mos7720_throttle,
1628 .unthrottle = mos7720_unthrottle,
1629 .attach = mos7720_startup,
1630 .shutdown = mos7720_shutdown,
1631 .ioctl = mos7720_ioctl,
1632 .set_termios = mos7720_set_termios,
1633 .write = mos7720_write,
1634 .write_room = mos7720_write_room,
1635 .chars_in_buffer = mos7720_chars_in_buffer,
1636 .break_ctl = mos7720_break,
1637 .read_bulk_callback = mos7720_bulk_in_callback,
1638 .read_int_callback = mos7720_interrupt_callback,
1639 };
1640
1641 static int __init moschip7720_init(void)
1642 {
1643 int retval;
1644
1645 dbg("%s: Entering ..........", __FUNCTION__);
1646
1647 /* Register with the usb serial */
1648 retval = usb_serial_register(&moschip7720_2port_driver);
1649 if (retval)
1650 goto failed_port_device_register;
1651
1652 info(DRIVER_DESC " " DRIVER_VERSION);
1653
1654 /* Register with the usb */
1655 retval = usb_register(&usb_driver);
1656 if (retval)
1657 goto failed_usb_register;
1658
1659 return 0;
1660
1661 failed_usb_register:
1662 usb_serial_deregister(&moschip7720_2port_driver);
1663
1664 failed_port_device_register:
1665 return retval;
1666 }
1667
1668 static void __exit moschip7720_exit(void)
1669 {
1670 usb_deregister(&usb_driver);
1671 usb_serial_deregister(&moschip7720_2port_driver);
1672 }
1673
1674 module_init(moschip7720_init);
1675 module_exit(moschip7720_exit);
1676
1677 /* Module information */
1678 MODULE_AUTHOR( DRIVER_AUTHOR );
1679 MODULE_DESCRIPTION( DRIVER_DESC );
1680 MODULE_LICENSE("GPL");
1681
1682 module_param(debug, bool, S_IRUGO | S_IWUSR);
1683 MODULE_PARM_DESC(debug, "Debug enabled or not");
Stable & featurefull patchset based on Linus's git branch