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Linux 2.6.26-rc5
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / usb / serial / mos7720.c
blob50f1fe263338dc5fb736a4c8024ddd1afb4fb765
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", __func__,
122 status);
123 return;
124 default:
125 dbg("%s - nonzero urb status received: %d", __func__,
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 __func__, 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", __func__);
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.", __func__);
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 __func__, 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", __func__, 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 ...........", __func__);
525
526 mos7720_port = usb_get_serial_port_data(port);
527 if (mos7720_port == NULL) {
528 dbg("%s:leaving ...........", __func__);
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", __func__, 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, otherwise nop */
568 dbg("Shutdown bulk write");
569 usb_kill_urb(port->write_urb);
570 dbg("Shutdown bulk read");
571 usb_kill_urb(port->read_urb);
572
573 mutex_lock(&serial->disc_mutex);
574 /* these commands must not be issued if the device has
575 * been disconnected */
576 if (!serial->disconnected) {
577 data = 0x00;
578 send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
579 0x04, &data);
580
581 data = 0x00;
582 send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
583 0x01, &data);
584 }
585 mutex_unlock(&serial->disc_mutex);
586 mos7720_port->open = 0;
587
588 dbg("Leaving %s", __func__);
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", __func__);
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 ...........", __func__);
631
632 mos7720_port = usb_get_serial_port_data(port);
633 if (mos7720_port == NULL) {
634 dbg("%s:leaving ...........", __func__);
635 return -ENODEV;
636 }
637
638 /* FIXME: Locking */
639 for (i = 0; i < NUM_URBS; ++i) {
640 if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
641 room += URB_TRANSFER_BUFFER_SIZE;
642 }
643
644 dbg("%s - returns %d", __func__, room);
645 return room;
646 }
647
648 static int mos7720_write(struct usb_serial_port *port,
649 const unsigned char *data, int count)
650 {
651 int status;
652 int i;
653 int bytes_sent = 0;
654 int transfer_size;
655
656 struct moschip_port *mos7720_port;
657 struct usb_serial *serial;
658 struct urb *urb;
659 const unsigned char *current_position = data;
660
661 dbg("%s:entering ...........", __func__);
662
663 serial = port->serial;
664
665 mos7720_port = usb_get_serial_port_data(port);
666 if (mos7720_port == NULL) {
667 dbg("mos7720_port is NULL");
668 return -ENODEV;
669 }
670
671 /* try to find a free urb in the list */
672 urb = NULL;
673
674 for (i = 0; i < NUM_URBS; ++i) {
675 if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) {
676 urb = mos7720_port->write_urb_pool[i];
677 dbg("URB:%d",i);
678 break;
679 }
680 }
681
682 if (urb == NULL) {
683 dbg("%s - no more free urbs", __func__);
684 goto exit;
685 }
686
687 if (urb->transfer_buffer == NULL) {
688 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
689 GFP_KERNEL);
690 if (urb->transfer_buffer == NULL) {
691 err("%s no more kernel memory...", __func__);
692 goto exit;
693 }
694 }
695 transfer_size = min (count, URB_TRANSFER_BUFFER_SIZE);
696
697 memcpy(urb->transfer_buffer, current_position, transfer_size);
698 usb_serial_debug_data(debug, &port->dev, __func__, transfer_size,
699 urb->transfer_buffer);
700
701 /* fill urb with data and submit */
702 usb_fill_bulk_urb(urb, serial->dev,
703 usb_sndbulkpipe(serial->dev,
704 port->bulk_out_endpointAddress),
705 urb->transfer_buffer, transfer_size,
706 mos7720_bulk_out_data_callback, mos7720_port);
707
708 /* send it down the pipe */
709 status = usb_submit_urb(urb,GFP_ATOMIC);
710 if (status) {
711 err("%s - usb_submit_urb(write bulk) failed with status = %d",
712 __func__, status);
713 bytes_sent = status;
714 goto exit;
715 }
716 bytes_sent = transfer_size;
717
718 exit:
719 return bytes_sent;
720 }
721
722 static void mos7720_throttle(struct usb_serial_port *port)
723 {
724 struct moschip_port *mos7720_port;
725 struct tty_struct *tty;
726 int status;
727
728 dbg("%s- port %d\n", __func__, port->number);
729
730 mos7720_port = usb_get_serial_port_data(port);
731
732 if (mos7720_port == NULL)
733 return;
734
735 if (!mos7720_port->open) {
736 dbg("port not opened");
737 return;
738 }
739
740 dbg("%s: Entering ..........", __func__);
741
742 tty = port->tty;
743 if (!tty) {
744 dbg("%s - no tty available", __func__);
745 return;
746 }
747
748 /* if we are implementing XON/XOFF, send the stop character */
749 if (I_IXOFF(tty)) {
750 unsigned char stop_char = STOP_CHAR(tty);
751 status = mos7720_write(port, &stop_char, 1);
752 if (status <= 0)
753 return;
754 }
755
756 /* if we are implementing RTS/CTS, toggle that line */
757 if (tty->termios->c_cflag & CRTSCTS) {
758 mos7720_port->shadowMCR &= ~UART_MCR_RTS;
759 status = send_mos_cmd(port->serial, MOS_WRITE,
760 port->number - port->serial->minor,
761 UART_MCR, &mos7720_port->shadowMCR);
762 if (status != 0)
763 return;
764 }
765 }
766
767 static void mos7720_unthrottle(struct usb_serial_port *port)
768 {
769 struct tty_struct *tty;
770 int status;
771 struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
772
773 if (mos7720_port == NULL)
774 return;
775
776 if (!mos7720_port->open) {
777 dbg("%s - port not opened", __func__);
778 return;
779 }
780
781 dbg("%s: Entering ..........", __func__);
782
783 tty = port->tty;
784 if (!tty) {
785 dbg("%s - no tty available", __func__);
786 return;
787 }
788
789 /* if we are implementing XON/XOFF, send the start character */
790 if (I_IXOFF(tty)) {
791 unsigned char start_char = START_CHAR(tty);
792 status = mos7720_write(port, &start_char, 1);
793 if (status <= 0)
794 return;
795 }
796
797 /* if we are implementing RTS/CTS, toggle that line */
798 if (tty->termios->c_cflag & CRTSCTS) {
799 mos7720_port->shadowMCR |= UART_MCR_RTS;
800 status = send_mos_cmd(port->serial, MOS_WRITE,
801 port->number - port->serial->minor,
802 UART_MCR, &mos7720_port->shadowMCR);
803 if (status != 0)
804 return;
805 }
806 }
807
808 static int set_higher_rates(struct moschip_port *mos7720_port,
809 unsigned int baud)
810 {
811 unsigned char data;
812 struct usb_serial_port *port;
813 struct usb_serial *serial;
814 int port_number;
815
816 if (mos7720_port == NULL)
817 return -EINVAL;
818
819 port = mos7720_port->port;
820 serial = port->serial;
821
822 /***********************************************
823 * Init Sequence for higher rates
824 ***********************************************/
825 dbg("Sending Setting Commands ..........");
826 port_number = port->number - port->serial->minor;
827
828 data = 0x000;
829 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
830 data = 0x000;
831 send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
832 data = 0x0CF;
833 send_mos_cmd(serial, MOS_WRITE, port->number, 0x02, &data);
834 data = 0x00b;
835 mos7720_port->shadowMCR = data;
836 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
837 data = 0x00b;
838 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
839
840 data = 0x000;
841 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
842 data = 0x000;
843 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
844
845
846 /***********************************************
847 * Set for higher rates *
848 ***********************************************/
849
850 data = baud * 0x10;
851 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1,&data);
852
853 data = 0x003;
854 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
855 data = 0x003;
856 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
857
858 data = 0x02b;
859 mos7720_port->shadowMCR = data;
860 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
861 data = 0x02b;
862 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
863
864 /***********************************************
865 * Set DLL/DLM
866 ***********************************************/
867
868 data = mos7720_port->shadowLCR | UART_LCR_DLAB;
869 mos7720_port->shadowLCR = data;
870 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
871
872 data = 0x001; /* DLL */
873 send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
874 data = 0x000; /* DLM */
875 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
876
877 data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
878 mos7720_port->shadowLCR = data;
879 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
880
881 return 0;
882 }
883
884 /* baud rate information */
885 struct divisor_table_entry
886 {
887 __u32 baudrate;
888 __u16 divisor;
889 };
890
891 /* Define table of divisors for moschip 7720 hardware *
892 * These assume a 3.6864MHz crystal, the standard /16, and *
893 * MCR.7 = 0. */
894 static struct divisor_table_entry divisor_table[] = {
895 { 50, 2304},
896 { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */
897 { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */
898 { 150, 768},
899 { 300, 384},
900 { 600, 192},
901 { 1200, 96},
902 { 1800, 64},
903 { 2400, 48},
904 { 4800, 24},
905 { 7200, 16},
906 { 9600, 12},
907 { 19200, 6},
908 { 38400, 3},
909 { 57600, 2},
910 { 115200, 1},
911 };
912
913 /*****************************************************************************
914 * calc_baud_rate_divisor
915 * this function calculates the proper baud rate divisor for the specified
916 * baud rate.
917 *****************************************************************************/
918 static int calc_baud_rate_divisor(int baudrate, int *divisor)
919 {
920 int i;
921 __u16 custom;
922 __u16 round1;
923 __u16 round;
924
925
926 dbg("%s - %d", __func__, baudrate);
927
928 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
929 if (divisor_table[i].baudrate == baudrate) {
930 *divisor = divisor_table[i].divisor;
931 return 0;
932 }
933 }
934
935 /* After trying for all the standard baud rates *
936 * Try calculating the divisor for this baud rate */
937 if (baudrate > 75 && baudrate < 230400) {
938 /* get the divisor */
939 custom = (__u16)(230400L / baudrate);
940
941 /* Check for round off */
942 round1 = (__u16)(2304000L / baudrate);
943 round = (__u16)(round1 - (custom * 10));
944 if (round > 4)
945 custom++;
946 *divisor = custom;
947
948 dbg("Baud %d = %d",baudrate, custom);
949 return 0;
950 }
951
952 dbg("Baud calculation Failed...");
953 return -EINVAL;
954 }
955
956 /*
957 * send_cmd_write_baud_rate
958 * this function sends the proper command to change the baud rate of the
959 * specified port.
960 */
961 static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port,
962 int baudrate)
963 {
964 struct usb_serial_port *port;
965 struct usb_serial *serial;
966 int divisor;
967 int status;
968 unsigned char data;
969 unsigned char number;
970
971 if (mos7720_port == NULL)
972 return -1;
973
974 port = mos7720_port->port;
975 serial = port->serial;
976
977 dbg("%s: Entering ..........", __func__);
978
979 number = port->number - port->serial->minor;
980 dbg("%s - port = %d, baud = %d", __func__, port->number, baudrate);
981
982 /* Calculate the Divisor */
983 status = calc_baud_rate_divisor(baudrate, &divisor);
984 if (status) {
985 err("%s - bad baud rate", __func__);
986 return status;
987 }
988
989 /* Enable access to divisor latch */
990 data = mos7720_port->shadowLCR | UART_LCR_DLAB;
991 mos7720_port->shadowLCR = data;
992 send_mos_cmd(serial, MOS_WRITE, number, UART_LCR, &data);
993
994 /* Write the divisor */
995 data = ((unsigned char)(divisor & 0xff));
996 send_mos_cmd(serial, MOS_WRITE, number, 0x00, &data);
997
998 data = ((unsigned char)((divisor & 0xff00) >> 8));
999 send_mos_cmd(serial, MOS_WRITE, number, 0x01, &data);
1000
1001 /* Disable access to divisor latch */
1002 data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
1003 mos7720_port->shadowLCR = data;
1004 send_mos_cmd(serial, MOS_WRITE, number, 0x03, &data);
1005
1006 return status;
1007 }
1008
1009 /*
1010 * change_port_settings
1011 * This routine is called to set the UART on the device to match
1012 * the specified new settings.
1013 */
1014 static void change_port_settings(struct moschip_port *mos7720_port,
1015 struct ktermios *old_termios)
1016 {
1017 struct usb_serial_port *port;
1018 struct usb_serial *serial;
1019 struct tty_struct *tty;
1020 int baud;
1021 unsigned cflag;
1022 unsigned iflag;
1023 __u8 mask = 0xff;
1024 __u8 lData;
1025 __u8 lParity;
1026 __u8 lStop;
1027 int status;
1028 int port_number;
1029 char data;
1030
1031 if (mos7720_port == NULL)
1032 return ;
1033
1034 port = mos7720_port->port;
1035 serial = port->serial;
1036 port_number = port->number - port->serial->minor;
1037
1038 dbg("%s - port %d", __func__, port->number);
1039
1040 if (!mos7720_port->open) {
1041 dbg("%s - port not opened", __func__);
1042 return;
1043 }
1044
1045 tty = mos7720_port->port->tty;
1046
1047 dbg("%s: Entering ..........", __func__);
1048
1049 lData = UART_LCR_WLEN8;
1050 lStop = 0x00; /* 1 stop bit */
1051 lParity = 0x00; /* No parity */
1052
1053 cflag = tty->termios->c_cflag;
1054 iflag = tty->termios->c_iflag;
1055
1056 /* Change the number of bits */
1057 switch (cflag & CSIZE) {
1058 case CS5:
1059 lData = UART_LCR_WLEN5;
1060 mask = 0x1f;
1061 break;
1062
1063 case CS6:
1064 lData = UART_LCR_WLEN6;
1065 mask = 0x3f;
1066 break;
1067
1068 case CS7:
1069 lData = UART_LCR_WLEN7;
1070 mask = 0x7f;
1071 break;
1072 default:
1073 case CS8:
1074 lData = UART_LCR_WLEN8;
1075 break;
1076 }
1077
1078 /* Change the Parity bit */
1079 if (cflag & PARENB) {
1080 if (cflag & PARODD) {
1081 lParity = UART_LCR_PARITY;
1082 dbg("%s - parity = odd", __func__);
1083 } else {
1084 lParity = (UART_LCR_EPAR | UART_LCR_PARITY);
1085 dbg("%s - parity = even", __func__);
1086 }
1087
1088 } else {
1089 dbg("%s - parity = none", __func__);
1090 }
1091
1092 if (cflag & CMSPAR)
1093 lParity = lParity | 0x20;
1094
1095 /* Change the Stop bit */
1096 if (cflag & CSTOPB) {
1097 lStop = UART_LCR_STOP;
1098 dbg("%s - stop bits = 2", __func__);
1099 } else {
1100 lStop = 0x00;
1101 dbg("%s - stop bits = 1", __func__);
1102 }
1103
1104 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
1105 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
1106 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
1107
1108 /* Update the LCR with the correct value */
1109 mos7720_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1110 mos7720_port->shadowLCR |= (lData | lParity | lStop);
1111
1112
1113 /* Disable Interrupts */
1114 data = 0x00;
1115 send_mos_cmd(serial,MOS_WRITE,port->number - port->serial->minor, UART_IER, &data);
1116
1117 data = 0x00;
1118 send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
1119
1120 data = 0xcf;
1121 send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
1122
1123 /* Send the updated LCR value to the mos7720 */
1124 data = mos7720_port->shadowLCR;
1125 send_mos_cmd(serial, MOS_WRITE, port_number, UART_LCR, &data);
1126
1127 data = 0x00b;
1128 mos7720_port->shadowMCR = data;
1129 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
1130 data = 0x00b;
1131 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
1132
1133 /* set up the MCR register and send it to the mos7720 */
1134 mos7720_port->shadowMCR = UART_MCR_OUT2;
1135 if (cflag & CBAUD)
1136 mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS);
1137
1138 if (cflag & CRTSCTS) {
1139 mos7720_port->shadowMCR |= (UART_MCR_XONANY);
1140
1141 /* To set hardware flow control to the specified *
1142 * serial port, in SP1/2_CONTROL_REG */
1143 if (port->number) {
1144 data = 0x001;
1145 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
1146 0x08, &data);
1147 } else {
1148 data = 0x002;
1149 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
1150 0x08, &data);
1151 }
1152 } else {
1153 mos7720_port->shadowMCR &= ~(UART_MCR_XONANY);
1154 }
1155
1156 data = mos7720_port->shadowMCR;
1157 send_mos_cmd(serial, MOS_WRITE, port_number, UART_MCR, &data);
1158
1159 /* Determine divisor based on baud rate */
1160 baud = tty_get_baud_rate(tty);
1161 if (!baud) {
1162 /* pick a default, any default... */
1163 dbg("Picked default baud...");
1164 baud = 9600;
1165 }
1166
1167 if (baud >= 230400) {
1168 set_higher_rates(mos7720_port, baud);
1169 /* Enable Interrupts */
1170 data = 0x0c;
1171 send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
1172 return;
1173 }
1174
1175 dbg("%s - baud rate = %d", __func__, baud);
1176 status = send_cmd_write_baud_rate(mos7720_port, baud);
1177 /* FIXME: needs to write actual resulting baud back not just
1178 blindly do so */
1179 if (cflag & CBAUD)
1180 tty_encode_baud_rate(tty, baud, baud);
1181 /* Enable Interrupts */
1182 data = 0x0c;
1183 send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
1184
1185 if (port->read_urb->status != -EINPROGRESS) {
1186 port->read_urb->dev = serial->dev;
1187
1188 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1189 if (status)
1190 dbg("usb_submit_urb(read bulk) failed, status = %d",
1191 status);
1192 }
1193 return;
1194 }
1195
1196 /*
1197 * mos7720_set_termios
1198 * this function is called by the tty driver when it wants to change the
1199 * termios structure.
1200 */
1201 static void mos7720_set_termios(struct usb_serial_port *port,
1202 struct ktermios *old_termios)
1203 {
1204 int status;
1205 unsigned int cflag;
1206 struct usb_serial *serial;
1207 struct moschip_port *mos7720_port;
1208 struct tty_struct *tty;
1209
1210 serial = port->serial;
1211
1212 mos7720_port = usb_get_serial_port_data(port);
1213
1214 if (mos7720_port == NULL)
1215 return;
1216
1217 tty = port->tty;
1218
1219
1220 if (!mos7720_port->open) {
1221 dbg("%s - port not opened", __func__);
1222 return;
1223 }
1224
1225 dbg("%s\n","setting termios - ASPIRE");
1226
1227 cflag = tty->termios->c_cflag;
1228
1229 dbg("%s - cflag %08x iflag %08x", __func__,
1230 tty->termios->c_cflag,
1231 RELEVANT_IFLAG(tty->termios->c_iflag));
1232
1233 dbg("%s - old cflag %08x old iflag %08x", __func__,
1234 old_termios->c_cflag,
1235 RELEVANT_IFLAG(old_termios->c_iflag));
1236
1237 dbg("%s - port %d", __func__, port->number);
1238
1239 /* change the port settings to the new ones specified */
1240 change_port_settings(mos7720_port, old_termios);
1241
1242 if(!port->read_urb) {
1243 dbg("%s","URB KILLED !!!!!\n");
1244 return;
1245 }
1246
1247 if(port->read_urb->status != -EINPROGRESS) {
1248 port->read_urb->dev = serial->dev;
1249 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1250 if (status)
1251 dbg("usb_submit_urb(read bulk) failed, status = %d",
1252 status);
1253 }
1254 return;
1255 }
1256
1257 /*
1258 * get_lsr_info - get line status register info
1259 *
1260 * Purpose: Let user call ioctl() to get info when the UART physically
1261 * is emptied. On bus types like RS485, the transmitter must
1262 * release the bus after transmitting. This must be done when
1263 * the transmit shift register is empty, not be done when the
1264 * transmit holding register is empty. This functionality
1265 * allows an RS485 driver to be written in user space.
1266 */
1267 static int get_lsr_info(struct moschip_port *mos7720_port,
1268 unsigned int __user *value)
1269 {
1270 int count;
1271 unsigned int result = 0;
1272
1273 count = mos7720_chars_in_buffer(mos7720_port->port);
1274 if (count == 0) {
1275 dbg("%s -- Empty", __func__);
1276 result = TIOCSER_TEMT;
1277 }
1278
1279 if (copy_to_user(value, &result, sizeof(int)))
1280 return -EFAULT;
1281 return 0;
1282 }
1283
1284 /*
1285 * get_number_bytes_avail - get number of bytes available
1286 *
1287 * Purpose: Let user call ioctl to get the count of number of bytes available.
1288 */
1289 static int get_number_bytes_avail(struct moschip_port *mos7720_port,
1290 unsigned int __user *value)
1291 {
1292 unsigned int result = 0;
1293 struct tty_struct *tty = mos7720_port->port->tty;
1294
1295 if (!tty)
1296 return -ENOIOCTLCMD;
1297
1298 result = tty->read_cnt;
1299
1300 dbg("%s(%d) = %d", __func__, mos7720_port->port->number, result);
1301 if (copy_to_user(value, &result, sizeof(int)))
1302 return -EFAULT;
1303
1304 return -ENOIOCTLCMD;
1305 }
1306
1307 static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
1308 unsigned int __user *value)
1309 {
1310 unsigned int mcr ;
1311 unsigned int arg;
1312 unsigned char data;
1313
1314 struct usb_serial_port *port;
1315
1316 if (mos7720_port == NULL)
1317 return -1;
1318
1319 port = (struct usb_serial_port*)mos7720_port->port;
1320 mcr = mos7720_port->shadowMCR;
1321
1322 if (copy_from_user(&arg, value, sizeof(int)))
1323 return -EFAULT;
1324
1325 switch (cmd) {
1326 case TIOCMBIS:
1327 if (arg & TIOCM_RTS)
1328 mcr |= UART_MCR_RTS;
1329 if (arg & TIOCM_DTR)
1330 mcr |= UART_MCR_RTS;
1331 if (arg & TIOCM_LOOP)
1332 mcr |= UART_MCR_LOOP;
1333 break;
1334
1335 case TIOCMBIC:
1336 if (arg & TIOCM_RTS)
1337 mcr &= ~UART_MCR_RTS;
1338 if (arg & TIOCM_DTR)
1339 mcr &= ~UART_MCR_RTS;
1340 if (arg & TIOCM_LOOP)
1341 mcr &= ~UART_MCR_LOOP;
1342 break;
1343
1344 case TIOCMSET:
1345 /* turn off the RTS and DTR and LOOPBACK
1346 * and then only turn on what was asked to */
1347 mcr &= ~(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_LOOP);
1348 mcr |= ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0);
1349 mcr |= ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0);
1350 mcr |= ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0);
1351 break;
1352 }
1353
1354 mos7720_port->shadowMCR = mcr;
1355
1356 data = mos7720_port->shadowMCR;
1357 send_mos_cmd(port->serial, MOS_WRITE,
1358 port->number - port->serial->minor, UART_MCR, &data);
1359
1360 return 0;
1361 }
1362
1363 static int get_modem_info(struct moschip_port *mos7720_port,
1364 unsigned int __user *value)
1365 {
1366 unsigned int result = 0;
1367 unsigned int msr = mos7720_port->shadowMSR;
1368 unsigned int mcr = mos7720_port->shadowMCR;
1369
1370 result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1371 | ((mcr & UART_MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1372 | ((msr & UART_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1373 | ((msr & UART_MSR_DCD) ? TIOCM_CAR: 0) /* 0x040 */
1374 | ((msr & UART_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1375 | ((msr & UART_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1376
1377
1378 dbg("%s -- %x", __func__, result);
1379
1380 if (copy_to_user(value, &result, sizeof(int)))
1381 return -EFAULT;
1382 return 0;
1383 }
1384
1385 static int get_serial_info(struct moschip_port *mos7720_port,
1386 struct serial_struct __user *retinfo)
1387 {
1388 struct serial_struct tmp;
1389
1390 if (!retinfo)
1391 return -EFAULT;
1392
1393 memset(&tmp, 0, sizeof(tmp));
1394
1395 tmp.type = PORT_16550A;
1396 tmp.line = mos7720_port->port->serial->minor;
1397 tmp.port = mos7720_port->port->number;
1398 tmp.irq = 0;
1399 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1400 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
1401 tmp.baud_base = 9600;
1402 tmp.close_delay = 5*HZ;
1403 tmp.closing_wait = 30*HZ;
1404
1405 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1406 return -EFAULT;
1407 return 0;
1408 }
1409
1410 static int mos7720_ioctl(struct usb_serial_port *port, struct file *file,
1411 unsigned int cmd, unsigned long arg)
1412 {
1413 struct moschip_port *mos7720_port;
1414 struct async_icount cnow;
1415 struct async_icount cprev;
1416 struct serial_icounter_struct icount;
1417
1418 mos7720_port = usb_get_serial_port_data(port);
1419 if (mos7720_port == NULL)
1420 return -ENODEV;
1421
1422 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1423
1424 switch (cmd) {
1425 case TIOCINQ:
1426 /* return number of bytes available */
1427 dbg("%s (%d) TIOCINQ", __func__, port->number);
1428 return get_number_bytes_avail(mos7720_port,
1429 (unsigned int __user *)arg);
1430 break;
1431
1432 case TIOCSERGETLSR:
1433 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
1434 return get_lsr_info(mos7720_port, (unsigned int __user *)arg);
1435 return 0;
1436
1437 case TIOCMBIS:
1438 case TIOCMBIC:
1439 case TIOCMSET:
1440 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__,
1441 port->number);
1442 return set_modem_info(mos7720_port, cmd,
1443 (unsigned int __user *)arg);
1444
1445 case TIOCMGET:
1446 dbg("%s (%d) TIOCMGET", __func__, port->number);
1447 return get_modem_info(mos7720_port,
1448 (unsigned int __user *)arg);
1449
1450 case TIOCGSERIAL:
1451 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
1452 return get_serial_info(mos7720_port,
1453 (struct serial_struct __user *)arg);
1454
1455 case TIOCSSERIAL:
1456 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
1457 break;
1458
1459 case TIOCMIWAIT:
1460 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
1461 cprev = mos7720_port->icount;
1462 while (1) {
1463 if (signal_pending(current))
1464 return -ERESTARTSYS;
1465 cnow = mos7720_port->icount;
1466 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1467 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1468 return -EIO; /* no change => error */
1469 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1470 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1471 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1472 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1473 return 0;
1474 }
1475 cprev = cnow;
1476 }
1477 /* NOTREACHED */
1478 break;
1479
1480 case TIOCGICOUNT:
1481 cnow = mos7720_port->icount;
1482 icount.cts = cnow.cts;
1483 icount.dsr = cnow.dsr;
1484 icount.rng = cnow.rng;
1485 icount.dcd = cnow.dcd;
1486 icount.rx = cnow.rx;
1487 icount.tx = cnow.tx;
1488 icount.frame = cnow.frame;
1489 icount.overrun = cnow.overrun;
1490 icount.parity = cnow.parity;
1491 icount.brk = cnow.brk;
1492 icount.buf_overrun = cnow.buf_overrun;
1493
1494 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
1495 port->number, icount.rx, icount.tx );
1496 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1497 return -EFAULT;
1498 return 0;
1499 }
1500
1501 return -ENOIOCTLCMD;
1502 }
1503
1504 static int mos7720_startup(struct usb_serial *serial)
1505 {
1506 struct moschip_serial *mos7720_serial;
1507 struct moschip_port *mos7720_port;
1508 struct usb_device *dev;
1509 int i;
1510 char data;
1511
1512 dbg("%s: Entering ..........", __func__);
1513
1514 if (!serial) {
1515 dbg("Invalid Handler");
1516 return -ENODEV;
1517 }
1518
1519 dev = serial->dev;
1520
1521 /* create our private serial structure */
1522 mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL);
1523 if (mos7720_serial == NULL) {
1524 err("%s - Out of memory", __func__);
1525 return -ENOMEM;
1526 }
1527
1528 usb_set_serial_data(serial, mos7720_serial);
1529
1530 /* we set up the pointers to the endpoints in the mos7720_open *
1531 * function, as the structures aren't created yet. */
1532
1533 /* set up port private structures */
1534 for (i = 0; i < serial->num_ports; ++i) {
1535 mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
1536 if (mos7720_port == NULL) {
1537 err("%s - Out of memory", __func__);
1538 usb_set_serial_data(serial, NULL);
1539 kfree(mos7720_serial);
1540 return -ENOMEM;
1541 }
1542
1543 /* Initialize all port interrupt end point to port 0 int
1544 * endpoint. Our device has only one interrupt endpoint
1545 * comman to all ports */
1546 serial->port[i]->interrupt_in_endpointAddress = serial->port[0]->interrupt_in_endpointAddress;
1547
1548 mos7720_port->port = serial->port[i];
1549 usb_set_serial_port_data(serial->port[i], mos7720_port);
1550
1551 dbg("port number is %d", serial->port[i]->number);
1552 dbg("serial number is %d", serial->minor);
1553 }
1554
1555
1556 /* setting configuration feature to one */
1557 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1558 (__u8)0x03, 0x00,0x01,0x00, NULL, 0x00, 5*HZ);
1559
1560 send_mos_cmd(serial,MOS_READ,0x00, UART_LSR, &data); // LSR For Port 1
1561 dbg("LSR:%x",data);
1562
1563 send_mos_cmd(serial,MOS_READ,0x01, UART_LSR, &data); // LSR For Port 2
1564 dbg("LSR:%x",data);
1565
1566 return 0;
1567 }
1568
1569 static void mos7720_shutdown(struct usb_serial *serial)
1570 {
1571 int i;
1572
1573 /* free private structure allocated for serial port */
1574 for (i=0; i < serial->num_ports; ++i) {
1575 kfree(usb_get_serial_port_data(serial->port[i]));
1576 usb_set_serial_port_data(serial->port[i], NULL);
1577 }
1578
1579 /* free private structure allocated for serial device */
1580 kfree(usb_get_serial_data(serial));
1581 usb_set_serial_data(serial, NULL);
1582 }
1583
1584 static struct usb_driver usb_driver = {
1585 .name = "moschip7720",
1586 .probe = usb_serial_probe,
1587 .disconnect = usb_serial_disconnect,
1588 .id_table = moschip_port_id_table,
1589 .no_dynamic_id = 1,
1590 };
1591
1592 static struct usb_serial_driver moschip7720_2port_driver = {
1593 .driver = {
1594 .owner = THIS_MODULE,
1595 .name = "moschip7720",
1596 },
1597 .description = "Moschip 2 port adapter",
1598 .usb_driver = &usb_driver,
1599 .id_table = moschip_port_id_table,
1600 .num_ports = 2,
1601 .open = mos7720_open,
1602 .close = mos7720_close,
1603 .throttle = mos7720_throttle,
1604 .unthrottle = mos7720_unthrottle,
1605 .attach = mos7720_startup,
1606 .shutdown = mos7720_shutdown,
1607 .ioctl = mos7720_ioctl,
1608 .set_termios = mos7720_set_termios,
1609 .write = mos7720_write,
1610 .write_room = mos7720_write_room,
1611 .chars_in_buffer = mos7720_chars_in_buffer,
1612 .break_ctl = mos7720_break,
1613 .read_bulk_callback = mos7720_bulk_in_callback,
1614 .read_int_callback = mos7720_interrupt_callback,
1615 };
1616
1617 static int __init moschip7720_init(void)
1618 {
1619 int retval;
1620
1621 dbg("%s: Entering ..........", __func__);
1622
1623 /* Register with the usb serial */
1624 retval = usb_serial_register(&moschip7720_2port_driver);
1625 if (retval)
1626 goto failed_port_device_register;
1627
1628 info(DRIVER_DESC " " DRIVER_VERSION);
1629
1630 /* Register with the usb */
1631 retval = usb_register(&usb_driver);
1632 if (retval)
1633 goto failed_usb_register;
1634
1635 return 0;
1636
1637 failed_usb_register:
1638 usb_serial_deregister(&moschip7720_2port_driver);
1639
1640 failed_port_device_register:
1641 return retval;
1642 }
1643
1644 static void __exit moschip7720_exit(void)
1645 {
1646 usb_deregister(&usb_driver);
1647 usb_serial_deregister(&moschip7720_2port_driver);
1648 }
1649
1650 module_init(moschip7720_init);
1651 module_exit(moschip7720_exit);
1652
1653 /* Module information */
1654 MODULE_AUTHOR( DRIVER_AUTHOR );
1655 MODULE_DESCRIPTION( DRIVER_DESC );
1656 MODULE_LICENSE("GPL");
1657
1658 module_param(debug, bool, S_IRUGO | S_IWUSR);
1659 MODULE_PARM_DESC(debug, "Debug enabled or not");
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