]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/usb/serial/mos7720.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'topic/lx6464es' into for-linus
[mirror_ubuntu-artful-kernel.git] / drivers / usb / serial / mos7720.c
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 <linux/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 __u8 shadowLCR; /* last LCR value received */
69 __u8 shadowMCR; /* last MCR value received */
70 __u8 shadowMSR; /* last MSR value received */
71 char open;
72 struct async_icount icount;
73 struct usb_serial_port *port; /* loop back to the owner */
74 struct urb *write_urb_pool[NUM_URBS];
75 };
76
77 /* This structure holds all of the individual serial device information */
78 struct moschip_serial {
79 int interrupt_started;
80 };
81
82 static int debug;
83
84 #define USB_VENDOR_ID_MOSCHIP 0x9710
85 #define MOSCHIP_DEVICE_ID_7720 0x7720
86 #define MOSCHIP_DEVICE_ID_7715 0x7715
87
88 static struct usb_device_id moschip_port_id_table [] = {
89 { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) },
90 { } /* terminating entry */
91 };
92 MODULE_DEVICE_TABLE(usb, moschip_port_id_table);
93
94
95 /*
96 * mos7720_interrupt_callback
97 * this is the callback function for when we have received data on the
98 * interrupt endpoint.
99 */
100 static void mos7720_interrupt_callback(struct urb *urb)
101 {
102 int result;
103 int length;
104 int status = urb->status;
105 __u8 *data;
106 __u8 sp1;
107 __u8 sp2;
108
109 dbg("%s", " : Entering\n");
110
111 switch (status) {
112 case 0:
113 /* success */
114 break;
115 case -ECONNRESET:
116 case -ENOENT:
117 case -ESHUTDOWN:
118 /* this urb is terminated, clean up */
119 dbg("%s - urb shutting down with status: %d", __func__,
120 status);
121 return;
122 default:
123 dbg("%s - nonzero urb status received: %d", __func__,
124 status);
125 goto exit;
126 }
127
128 length = urb->actual_length;
129 data = urb->transfer_buffer;
130
131 /* Moschip get 4 bytes
132 * Byte 1 IIR Port 1 (port.number is 0)
133 * Byte 2 IIR Port 2 (port.number is 1)
134 * Byte 3 --------------
135 * Byte 4 FIFO status for both */
136
137 /* the above description is inverted
138 * oneukum 2007-03-14 */
139
140 if (unlikely(length != 4)) {
141 dbg("Wrong data !!!");
142 return;
143 }
144
145 sp1 = data[3];
146 sp2 = data[2];
147
148 if ((sp1 | sp2) & 0x01) {
149 /* No Interrupt Pending in both the ports */
150 dbg("No Interrupt !!!");
151 } else {
152 switch (sp1 & 0x0f) {
153 case SERIAL_IIR_RLS:
154 dbg("Serial Port 1: Receiver status error or address "
155 "bit detected in 9-bit mode\n");
156 break;
157 case SERIAL_IIR_CTI:
158 dbg("Serial Port 1: Receiver time out");
159 break;
160 case SERIAL_IIR_MS:
161 dbg("Serial Port 1: Modem status change");
162 break;
163 }
164
165 switch (sp2 & 0x0f) {
166 case SERIAL_IIR_RLS:
167 dbg("Serial Port 2: Receiver status error or address "
168 "bit detected in 9-bit mode");
169 break;
170 case SERIAL_IIR_CTI:
171 dbg("Serial Port 2: Receiver time out");
172 break;
173 case SERIAL_IIR_MS:
174 dbg("Serial Port 2: Modem status change");
175 break;
176 }
177 }
178
179 exit:
180 result = usb_submit_urb(urb, GFP_ATOMIC);
181 if (result)
182 dev_err(&urb->dev->dev,
183 "%s - Error %d submitting control urb\n",
184 __func__, result);
185 return;
186 }
187
188 /*
189 * mos7720_bulk_in_callback
190 * this is the callback function for when we have received data on the
191 * bulk in endpoint.
192 */
193 static void mos7720_bulk_in_callback(struct urb *urb)
194 {
195 int retval;
196 unsigned char *data ;
197 struct usb_serial_port *port;
198 struct moschip_port *mos7720_port;
199 struct tty_struct *tty;
200 int status = urb->status;
201
202 if (status) {
203 dbg("nonzero read bulk status received: %d", status);
204 return;
205 }
206
207 mos7720_port = urb->context;
208 if (!mos7720_port) {
209 dbg("%s", "NULL mos7720_port pointer \n");
210 return ;
211 }
212
213 port = mos7720_port->port;
214
215 dbg("Entering...%s", __func__);
216
217 data = urb->transfer_buffer;
218
219 tty = tty_port_tty_get(&port->port);
220 if (tty && urb->actual_length) {
221 tty_buffer_request_room(tty, urb->actual_length);
222 tty_insert_flip_string(tty, data, urb->actual_length);
223 tty_flip_buffer_push(tty);
224 }
225 tty_kref_put(tty);
226
227 if (!port->read_urb) {
228 dbg("URB KILLED !!!");
229 return;
230 }
231
232 if (port->read_urb->status != -EINPROGRESS) {
233 port->read_urb->dev = port->serial->dev;
234
235 retval = usb_submit_urb(port->read_urb, GFP_ATOMIC);
236 if (retval)
237 dbg("usb_submit_urb(read bulk) failed, retval = %d",
238 retval);
239 }
240 }
241
242 /*
243 * mos7720_bulk_out_data_callback
244 * this is the callback function for when we have finished sending serial
245 * data on the bulk out endpoint.
246 */
247 static void mos7720_bulk_out_data_callback(struct urb *urb)
248 {
249 struct moschip_port *mos7720_port;
250 struct tty_struct *tty;
251 int status = urb->status;
252
253 if (status) {
254 dbg("nonzero write bulk status received:%d", status);
255 return;
256 }
257
258 mos7720_port = urb->context;
259 if (!mos7720_port) {
260 dbg("NULL mos7720_port pointer");
261 return ;
262 }
263
264 dbg("Entering .........");
265
266 tty = tty_port_tty_get(&mos7720_port->port->port);
267
268 if (tty && mos7720_port->open)
269 tty_wakeup(tty);
270 tty_kref_put(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 } else {
292 value = 0x0000;
293 if ((product == MOSCHIP_DEVICE_ID_7715) &&
294 (index != 0x08)) {
295 dbg("serial->product== MOSCHIP_DEVICE_ID_7715");
296 /* index = 0x01 ; */
297 }
298 }
299
300 if (request == MOS_WRITE) {
301 request = (__u8)MOS_WRITE;
302 requesttype = (__u8)0x40;
303 value = value + (__u16)*((unsigned char *)data);
304 data = NULL;
305 pipe = usb_sndctrlpipe(serial->dev, 0);
306 } else {
307 request = (__u8)MOS_READ;
308 requesttype = (__u8)0xC0;
309 size = 0x01;
310 pipe = usb_rcvctrlpipe(serial->dev, 0);
311 }
312
313 status = usb_control_msg(serial->dev, pipe, request, requesttype,
314 value, index, data, size, MOS_WDR_TIMEOUT);
315
316 if (status < 0)
317 dbg("Command Write failed Value %x index %x\n", value, index);
318
319 return status;
320 }
321
322 static int mos7720_open(struct tty_struct *tty,
323 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 dev_err(&port->dev, "No more urbs???\n");
359 continue;
360 }
361
362 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
363 GFP_KERNEL);
364 if (!urb->transfer_buffer) {
365 dev_err(&port->dev,
366 "%s-out of memory for urb buffers.\n",
367 __func__);
368 usb_free_urb(mos7720_port->write_urb_pool[j]);
369 mos7720_port->write_urb_pool[j] = NULL;
370 continue;
371 }
372 allocated_urbs++;
373 }
374
375 if (!allocated_urbs)
376 return -ENOMEM;
377
378 /* Initialize MCS7720 -- Write Init values to corresponding Registers
379 *
380 * Register Index
381 * 1 : IER
382 * 2 : FCR
383 * 3 : LCR
384 * 4 : MCR
385 *
386 * 0x08 : SP1/2 Control Reg
387 */
388 port_number = port->number - port->serial->minor;
389 send_mos_cmd(port->serial, MOS_READ, port_number, UART_LSR, &data);
390 dbg("SS::%p LSR:%x\n", mos7720_port, data);
391
392 dbg("Check:Sending Command ..........");
393
394 data = 0x02;
395 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x01, &data);
396 data = 0x02;
397 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x02, &data);
398
399 data = 0x00;
400 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
401 data = 0x00;
402 send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
403
404 data = 0xCF;
405 send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
406 data = 0x03;
407 mos7720_port->shadowLCR = data;
408 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
409 data = 0x0b;
410 mos7720_port->shadowMCR = data;
411 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
412 data = 0x0b;
413 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
414
415 data = 0x00;
416 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
417 data = 0x00;
418 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
419
420 /* data = 0x00;
421 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, port_number + 1, &data);
422 data = 0x03;
423 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
424 data = 0x00;
425 send_mos_cmd(port->serial, MOS_WRITE, MOS_MAX_PORT,
426 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 /* see if we've set up our endpoint info yet *
450 * (can't set it up in mos7720_startup as the *
451 * structures were not set up at that time.) */
452 if (!mos7720_serial->interrupt_started) {
453 dbg("Interrupt buffer NULL !!!");
454
455 /* not set up yet, so do it now */
456 mos7720_serial->interrupt_started = 1;
457
458 dbg("To Submit URB !!!");
459
460 /* set up our interrupt urb */
461 usb_fill_int_urb(port0->interrupt_in_urb, serial->dev,
462 usb_rcvintpipe(serial->dev,
463 port->interrupt_in_endpointAddress),
464 port0->interrupt_in_buffer,
465 port0->interrupt_in_urb->transfer_buffer_length,
466 mos7720_interrupt_callback, mos7720_port,
467 port0->interrupt_in_urb->interval);
468
469 /* start interrupt read for this mos7720 this interrupt *
470 * will continue as long as the mos7720 is connected */
471 dbg("Submit URB over !!!");
472 response = usb_submit_urb(port0->interrupt_in_urb, GFP_KERNEL);
473 if (response)
474 dev_err(&port->dev,
475 "%s - Error %d submitting control urb\n",
476 __func__, response);
477 }
478
479 /* set up our bulk in urb */
480 usb_fill_bulk_urb(port->read_urb, serial->dev,
481 usb_rcvbulkpipe(serial->dev,
482 port->bulk_in_endpointAddress),
483 port->bulk_in_buffer,
484 port->read_urb->transfer_buffer_length,
485 mos7720_bulk_in_callback, mos7720_port);
486 response = usb_submit_urb(port->read_urb, GFP_KERNEL);
487 if (response)
488 dev_err(&port->dev, "%s - Error %d submitting read urb\n",
489 __func__, response);
490
491 /* initialize our icount structure */
492 memset(&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount));
493
494 /* initialize our port settings */
495 mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */
496
497 /* send a open port command */
498 mos7720_port->open = 1;
499
500 return 0;
501 }
502
503 /*
504 * mos7720_chars_in_buffer
505 * this function is called by the tty driver when it wants to know how many
506 * bytes of data we currently have outstanding in the port (data that has
507 * been written, but hasn't made it out the port yet)
508 * If successful, we return the number of bytes left to be written in the
509 * system,
510 * Otherwise we return a negative error number.
511 */
512 static int mos7720_chars_in_buffer(struct tty_struct *tty)
513 {
514 struct usb_serial_port *port = tty->driver_data;
515 int i;
516 int chars = 0;
517 struct moschip_port *mos7720_port;
518
519 dbg("%s:entering ...........", __func__);
520
521 mos7720_port = usb_get_serial_port_data(port);
522 if (mos7720_port == NULL) {
523 dbg("%s:leaving ...........", __func__);
524 return -ENODEV;
525 }
526
527 for (i = 0; i < NUM_URBS; ++i) {
528 if (mos7720_port->write_urb_pool[i] &&
529 mos7720_port->write_urb_pool[i]->status == -EINPROGRESS)
530 chars += URB_TRANSFER_BUFFER_SIZE;
531 }
532 dbg("%s - returns %d", __func__, chars);
533 return chars;
534 }
535
536 static void mos7720_close(struct tty_struct *tty,
537 struct usb_serial_port *port, struct file *filp)
538 {
539 struct usb_serial *serial;
540 struct moschip_port *mos7720_port;
541 char data;
542 int j;
543
544 dbg("mos7720_close:entering...");
545
546 serial = port->serial;
547
548 mos7720_port = usb_get_serial_port_data(port);
549 if (mos7720_port == NULL)
550 return;
551
552 for (j = 0; j < NUM_URBS; ++j)
553 usb_kill_urb(mos7720_port->write_urb_pool[j]);
554
555 /* Freeing Write URBs */
556 for (j = 0; j < NUM_URBS; ++j) {
557 if (mos7720_port->write_urb_pool[j]) {
558 kfree(mos7720_port->write_urb_pool[j]->transfer_buffer);
559 usb_free_urb(mos7720_port->write_urb_pool[j]);
560 }
561 }
562
563 /* While closing port, shutdown all bulk read, write *
564 * and interrupt read if they exists, otherwise nop */
565 dbg("Shutdown bulk write");
566 usb_kill_urb(port->write_urb);
567 dbg("Shutdown bulk read");
568 usb_kill_urb(port->read_urb);
569
570 mutex_lock(&serial->disc_mutex);
571 /* these commands must not be issued if the device has
572 * been disconnected */
573 if (!serial->disconnected) {
574 data = 0x00;
575 send_mos_cmd(serial, MOS_WRITE,
576 port->number - port->serial->minor, 0x04, &data);
577
578 data = 0x00;
579 send_mos_cmd(serial, MOS_WRITE,
580 port->number - port->serial->minor, 0x01, &data);
581 }
582 mutex_unlock(&serial->disc_mutex);
583 mos7720_port->open = 0;
584
585 dbg("Leaving %s", __func__);
586 }
587
588 static void mos7720_break(struct tty_struct *tty, int break_state)
589 {
590 struct usb_serial_port *port = tty->driver_data;
591 unsigned char data;
592 struct usb_serial *serial;
593 struct moschip_port *mos7720_port;
594
595 dbg("Entering %s", __func__);
596
597 serial = port->serial;
598
599 mos7720_port = usb_get_serial_port_data(port);
600 if (mos7720_port == NULL)
601 return;
602
603 if (break_state == -1)
604 data = mos7720_port->shadowLCR | UART_LCR_SBC;
605 else
606 data = mos7720_port->shadowLCR & ~UART_LCR_SBC;
607
608 mos7720_port->shadowLCR = data;
609 send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
610 0x03, &data);
611
612 return;
613 }
614
615 /*
616 * mos7720_write_room
617 * this function is called by the tty driver when it wants to know how many
618 * bytes of data we can accept for a specific port.
619 * If successful, we return the amount of room that we have for this port
620 * Otherwise we return a negative error number.
621 */
622 static int mos7720_write_room(struct tty_struct *tty)
623 {
624 struct usb_serial_port *port = tty->driver_data;
625 struct moschip_port *mos7720_port;
626 int room = 0;
627 int i;
628
629 dbg("%s:entering ...........", __func__);
630
631 mos7720_port = usb_get_serial_port_data(port);
632 if (mos7720_port == NULL) {
633 dbg("%s:leaving ...........", __func__);
634 return -ENODEV;
635 }
636
637 /* FIXME: Locking */
638 for (i = 0; i < NUM_URBS; ++i) {
639 if (mos7720_port->write_urb_pool[i] &&
640 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 tty_struct *tty, 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] &&
676 mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) {
677 urb = mos7720_port->write_urb_pool[i];
678 dbg("URB:%d", i);
679 break;
680 }
681 }
682
683 if (urb == NULL) {
684 dbg("%s - no more free urbs", __func__);
685 goto exit;
686 }
687
688 if (urb->transfer_buffer == NULL) {
689 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
690 GFP_KERNEL);
691 if (urb->transfer_buffer == NULL) {
692 dev_err(&port->dev, "%s no more kernel memory...\n",
693 __func__);
694 goto exit;
695 }
696 }
697 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
698
699 memcpy(urb->transfer_buffer, current_position, transfer_size);
700 usb_serial_debug_data(debug, &port->dev, __func__, transfer_size,
701 urb->transfer_buffer);
702
703 /* fill urb with data and submit */
704 usb_fill_bulk_urb(urb, serial->dev,
705 usb_sndbulkpipe(serial->dev,
706 port->bulk_out_endpointAddress),
707 urb->transfer_buffer, transfer_size,
708 mos7720_bulk_out_data_callback, mos7720_port);
709
710 /* send it down the pipe */
711 status = usb_submit_urb(urb, GFP_ATOMIC);
712 if (status) {
713 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
714 "with status = %d\n", __func__, status);
715 bytes_sent = status;
716 goto exit;
717 }
718 bytes_sent = transfer_size;
719
720 exit:
721 return bytes_sent;
722 }
723
724 static void mos7720_throttle(struct tty_struct *tty)
725 {
726 struct usb_serial_port *port = tty->driver_data;
727 struct moschip_port *mos7720_port;
728 int status;
729
730 dbg("%s- port %d\n", __func__, port->number);
731
732 mos7720_port = usb_get_serial_port_data(port);
733
734 if (mos7720_port == NULL)
735 return;
736
737 if (!mos7720_port->open) {
738 dbg("port not opened");
739 return;
740 }
741
742 dbg("%s: Entering ..........", __func__);
743
744 /* if we are implementing XON/XOFF, send the stop character */
745 if (I_IXOFF(tty)) {
746 unsigned char stop_char = STOP_CHAR(tty);
747 status = mos7720_write(tty, port, &stop_char, 1);
748 if (status <= 0)
749 return;
750 }
751
752 /* if we are implementing RTS/CTS, toggle that line */
753 if (tty->termios->c_cflag & CRTSCTS) {
754 mos7720_port->shadowMCR &= ~UART_MCR_RTS;
755 status = send_mos_cmd(port->serial, MOS_WRITE,
756 port->number - port->serial->minor,
757 UART_MCR, &mos7720_port->shadowMCR);
758 if (status != 0)
759 return;
760 }
761 }
762
763 static void mos7720_unthrottle(struct tty_struct *tty)
764 {
765 struct usb_serial_port *port = tty->driver_data;
766 struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
767 int status;
768
769 if (mos7720_port == NULL)
770 return;
771
772 if (!mos7720_port->open) {
773 dbg("%s - port not opened", __func__);
774 return;
775 }
776
777 dbg("%s: Entering ..........", __func__);
778
779 /* if we are implementing XON/XOFF, send the start character */
780 if (I_IXOFF(tty)) {
781 unsigned char start_char = START_CHAR(tty);
782 status = mos7720_write(tty, port, &start_char, 1);
783 if (status <= 0)
784 return;
785 }
786
787 /* if we are implementing RTS/CTS, toggle that line */
788 if (tty->termios->c_cflag & CRTSCTS) {
789 mos7720_port->shadowMCR |= UART_MCR_RTS;
790 status = send_mos_cmd(port->serial, MOS_WRITE,
791 port->number - port->serial->minor,
792 UART_MCR, &mos7720_port->shadowMCR);
793 if (status != 0)
794 return;
795 }
796 }
797
798 static int set_higher_rates(struct moschip_port *mos7720_port,
799 unsigned int baud)
800 {
801 unsigned char data;
802 struct usb_serial_port *port;
803 struct usb_serial *serial;
804 int port_number;
805
806 if (mos7720_port == NULL)
807 return -EINVAL;
808
809 port = mos7720_port->port;
810 serial = port->serial;
811
812 /***********************************************
813 * Init Sequence for higher rates
814 ***********************************************/
815 dbg("Sending Setting Commands ..........");
816 port_number = port->number - port->serial->minor;
817
818 data = 0x000;
819 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
820 data = 0x000;
821 send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
822 data = 0x0CF;
823 send_mos_cmd(serial, MOS_WRITE, port->number, 0x02, &data);
824 data = 0x00b;
825 mos7720_port->shadowMCR = data;
826 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
827 data = 0x00b;
828 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
829
830 data = 0x000;
831 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
832 data = 0x000;
833 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
834
835
836 /***********************************************
837 * Set for higher rates *
838 ***********************************************/
839
840 data = baud * 0x10;
841 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
842
843 data = 0x003;
844 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
845 data = 0x003;
846 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
847
848 data = 0x02b;
849 mos7720_port->shadowMCR = data;
850 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
851 data = 0x02b;
852 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
853
854 /***********************************************
855 * Set DLL/DLM
856 ***********************************************/
857
858 data = mos7720_port->shadowLCR | UART_LCR_DLAB;
859 mos7720_port->shadowLCR = data;
860 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
861
862 data = 0x001; /* DLL */
863 send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
864 data = 0x000; /* DLM */
865 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
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 return 0;
872 }
873
874 /* baud rate information */
875 struct divisor_table_entry {
876 __u32 baudrate;
877 __u16 divisor;
878 };
879
880 /* Define table of divisors for moschip 7720 hardware *
881 * These assume a 3.6864MHz crystal, the standard /16, and *
882 * MCR.7 = 0. */
883 static struct divisor_table_entry divisor_table[] = {
884 { 50, 2304},
885 { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */
886 { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */
887 { 150, 768},
888 { 300, 384},
889 { 600, 192},
890 { 1200, 96},
891 { 1800, 64},
892 { 2400, 48},
893 { 4800, 24},
894 { 7200, 16},
895 { 9600, 12},
896 { 19200, 6},
897 { 38400, 3},
898 { 57600, 2},
899 { 115200, 1},
900 };
901
902 /*****************************************************************************
903 * calc_baud_rate_divisor
904 * this function calculates the proper baud rate divisor for the specified
905 * baud rate.
906 *****************************************************************************/
907 static int calc_baud_rate_divisor(int baudrate, int *divisor)
908 {
909 int i;
910 __u16 custom;
911 __u16 round1;
912 __u16 round;
913
914
915 dbg("%s - %d", __func__, baudrate);
916
917 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
918 if (divisor_table[i].baudrate == baudrate) {
919 *divisor = divisor_table[i].divisor;
920 return 0;
921 }
922 }
923
924 /* After trying for all the standard baud rates *
925 * Try calculating the divisor for this baud rate */
926 if (baudrate > 75 && baudrate < 230400) {
927 /* get the divisor */
928 custom = (__u16)(230400L / baudrate);
929
930 /* Check for round off */
931 round1 = (__u16)(2304000L / baudrate);
932 round = (__u16)(round1 - (custom * 10));
933 if (round > 4)
934 custom++;
935 *divisor = custom;
936
937 dbg("Baud %d = %d", baudrate, custom);
938 return 0;
939 }
940
941 dbg("Baud calculation Failed...");
942 return -EINVAL;
943 }
944
945 /*
946 * send_cmd_write_baud_rate
947 * this function sends the proper command to change the baud rate of the
948 * specified port.
949 */
950 static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port,
951 int baudrate)
952 {
953 struct usb_serial_port *port;
954 struct usb_serial *serial;
955 int divisor;
956 int status;
957 unsigned char data;
958 unsigned char number;
959
960 if (mos7720_port == NULL)
961 return -1;
962
963 port = mos7720_port->port;
964 serial = port->serial;
965
966 dbg("%s: Entering ..........", __func__);
967
968 number = port->number - port->serial->minor;
969 dbg("%s - port = %d, baud = %d", __func__, port->number, baudrate);
970
971 /* Calculate the Divisor */
972 status = calc_baud_rate_divisor(baudrate, &divisor);
973 if (status) {
974 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
975 return status;
976 }
977
978 /* Enable access to divisor latch */
979 data = mos7720_port->shadowLCR | UART_LCR_DLAB;
980 mos7720_port->shadowLCR = data;
981 send_mos_cmd(serial, MOS_WRITE, number, UART_LCR, &data);
982
983 /* Write the divisor */
984 data = ((unsigned char)(divisor & 0xff));
985 send_mos_cmd(serial, MOS_WRITE, number, 0x00, &data);
986
987 data = ((unsigned char)((divisor & 0xff00) >> 8));
988 send_mos_cmd(serial, MOS_WRITE, number, 0x01, &data);
989
990 /* Disable access to divisor latch */
991 data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
992 mos7720_port->shadowLCR = data;
993 send_mos_cmd(serial, MOS_WRITE, number, 0x03, &data);
994
995 return status;
996 }
997
998 /*
999 * change_port_settings
1000 * This routine is called to set the UART on the device to match
1001 * the specified new settings.
1002 */
1003 static void change_port_settings(struct tty_struct *tty,
1004 struct moschip_port *mos7720_port,
1005 struct ktermios *old_termios)
1006 {
1007 struct usb_serial_port *port;
1008 struct usb_serial *serial;
1009 int baud;
1010 unsigned cflag;
1011 unsigned iflag;
1012 __u8 mask = 0xff;
1013 __u8 lData;
1014 __u8 lParity;
1015 __u8 lStop;
1016 int status;
1017 int port_number;
1018 char data;
1019
1020 if (mos7720_port == NULL)
1021 return ;
1022
1023 port = mos7720_port->port;
1024 serial = port->serial;
1025 port_number = port->number - port->serial->minor;
1026
1027 dbg("%s - port %d", __func__, port->number);
1028
1029 if (!mos7720_port->open) {
1030 dbg("%s - port not opened", __func__);
1031 return;
1032 }
1033
1034 dbg("%s: Entering ..........", __func__);
1035
1036 lData = UART_LCR_WLEN8;
1037 lStop = 0x00; /* 1 stop bit */
1038 lParity = 0x00; /* No parity */
1039
1040 cflag = tty->termios->c_cflag;
1041 iflag = tty->termios->c_iflag;
1042
1043 /* Change the number of bits */
1044 switch (cflag & CSIZE) {
1045 case CS5:
1046 lData = UART_LCR_WLEN5;
1047 mask = 0x1f;
1048 break;
1049
1050 case CS6:
1051 lData = UART_LCR_WLEN6;
1052 mask = 0x3f;
1053 break;
1054
1055 case CS7:
1056 lData = UART_LCR_WLEN7;
1057 mask = 0x7f;
1058 break;
1059 default:
1060 case CS8:
1061 lData = UART_LCR_WLEN8;
1062 break;
1063 }
1064
1065 /* Change the Parity bit */
1066 if (cflag & PARENB) {
1067 if (cflag & PARODD) {
1068 lParity = UART_LCR_PARITY;
1069 dbg("%s - parity = odd", __func__);
1070 } else {
1071 lParity = (UART_LCR_EPAR | UART_LCR_PARITY);
1072 dbg("%s - parity = even", __func__);
1073 }
1074
1075 } else {
1076 dbg("%s - parity = none", __func__);
1077 }
1078
1079 if (cflag & CMSPAR)
1080 lParity = lParity | 0x20;
1081
1082 /* Change the Stop bit */
1083 if (cflag & CSTOPB) {
1084 lStop = UART_LCR_STOP;
1085 dbg("%s - stop bits = 2", __func__);
1086 } else {
1087 lStop = 0x00;
1088 dbg("%s - stop bits = 1", __func__);
1089 }
1090
1091 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
1092 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
1093 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
1094
1095 /* Update the LCR with the correct value */
1096 mos7720_port->shadowLCR &=
1097 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1098 mos7720_port->shadowLCR |= (lData | lParity | lStop);
1099
1100
1101 /* Disable Interrupts */
1102 data = 0x00;
1103 send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
1104 UART_IER, &data);
1105
1106 data = 0x00;
1107 send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
1108
1109 data = 0xcf;
1110 send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
1111
1112 /* Send the updated LCR value to the mos7720 */
1113 data = mos7720_port->shadowLCR;
1114 send_mos_cmd(serial, MOS_WRITE, port_number, UART_LCR, &data);
1115
1116 data = 0x00b;
1117 mos7720_port->shadowMCR = data;
1118 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
1119 data = 0x00b;
1120 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
1121
1122 /* set up the MCR register and send it to the mos7720 */
1123 mos7720_port->shadowMCR = UART_MCR_OUT2;
1124 if (cflag & CBAUD)
1125 mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS);
1126
1127 if (cflag & CRTSCTS) {
1128 mos7720_port->shadowMCR |= (UART_MCR_XONANY);
1129 /* To set hardware flow control to the specified *
1130 * serial port, in SP1/2_CONTROL_REG */
1131 if (port->number) {
1132 data = 0x001;
1133 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
1134 0x08, &data);
1135 } else {
1136 data = 0x002;
1137 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
1138 0x08, &data);
1139 }
1140 } else {
1141 mos7720_port->shadowMCR &= ~(UART_MCR_XONANY);
1142 }
1143
1144 data = mos7720_port->shadowMCR;
1145 send_mos_cmd(serial, MOS_WRITE, port_number, UART_MCR, &data);
1146
1147 /* Determine divisor based on baud rate */
1148 baud = tty_get_baud_rate(tty);
1149 if (!baud) {
1150 /* pick a default, any default... */
1151 dbg("Picked default baud...");
1152 baud = 9600;
1153 }
1154
1155 if (baud >= 230400) {
1156 set_higher_rates(mos7720_port, baud);
1157 /* Enable Interrupts */
1158 data = 0x0c;
1159 send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
1160 return;
1161 }
1162
1163 dbg("%s - baud rate = %d", __func__, baud);
1164 status = send_cmd_write_baud_rate(mos7720_port, baud);
1165 /* FIXME: needs to write actual resulting baud back not just
1166 blindly do so */
1167 if (cflag & CBAUD)
1168 tty_encode_baud_rate(tty, baud, baud);
1169 /* Enable Interrupts */
1170 data = 0x0c;
1171 send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
1172
1173 if (port->read_urb->status != -EINPROGRESS) {
1174 port->read_urb->dev = serial->dev;
1175
1176 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1177 if (status)
1178 dbg("usb_submit_urb(read bulk) failed, status = %d",
1179 status);
1180 }
1181 return;
1182 }
1183
1184 /*
1185 * mos7720_set_termios
1186 * this function is called by the tty driver when it wants to change the
1187 * termios structure.
1188 */
1189 static void mos7720_set_termios(struct tty_struct *tty,
1190 struct usb_serial_port *port, struct ktermios *old_termios)
1191 {
1192 int status;
1193 unsigned int cflag;
1194 struct usb_serial *serial;
1195 struct moschip_port *mos7720_port;
1196
1197 serial = port->serial;
1198
1199 mos7720_port = usb_get_serial_port_data(port);
1200
1201 if (mos7720_port == NULL)
1202 return;
1203
1204 if (!mos7720_port->open) {
1205 dbg("%s - port not opened", __func__);
1206 return;
1207 }
1208
1209 dbg("%s\n", "setting termios - ASPIRE");
1210
1211 cflag = tty->termios->c_cflag;
1212
1213 dbg("%s - cflag %08x iflag %08x", __func__,
1214 tty->termios->c_cflag,
1215 RELEVANT_IFLAG(tty->termios->c_iflag));
1216
1217 dbg("%s - old cflag %08x old iflag %08x", __func__,
1218 old_termios->c_cflag,
1219 RELEVANT_IFLAG(old_termios->c_iflag));
1220
1221 dbg("%s - port %d", __func__, port->number);
1222
1223 /* change the port settings to the new ones specified */
1224 change_port_settings(tty, mos7720_port, old_termios);
1225
1226 if (!port->read_urb) {
1227 dbg("%s", "URB KILLED !!!!!\n");
1228 return;
1229 }
1230
1231 if (port->read_urb->status != -EINPROGRESS) {
1232 port->read_urb->dev = serial->dev;
1233 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1234 if (status)
1235 dbg("usb_submit_urb(read bulk) failed, status = %d",
1236 status);
1237 }
1238 return;
1239 }
1240
1241 /*
1242 * get_lsr_info - get line status register info
1243 *
1244 * Purpose: Let user call ioctl() to get info when the UART physically
1245 * is emptied. On bus types like RS485, the transmitter must
1246 * release the bus after transmitting. This must be done when
1247 * the transmit shift register is empty, not be done when the
1248 * transmit holding register is empty. This functionality
1249 * allows an RS485 driver to be written in user space.
1250 */
1251 static int get_lsr_info(struct tty_struct *tty,
1252 struct moschip_port *mos7720_port, unsigned int __user *value)
1253 {
1254 int count;
1255 unsigned int result = 0;
1256
1257 count = mos7720_chars_in_buffer(tty);
1258 if (count == 0) {
1259 dbg("%s -- Empty", __func__);
1260 result = TIOCSER_TEMT;
1261 }
1262
1263 if (copy_to_user(value, &result, sizeof(int)))
1264 return -EFAULT;
1265 return 0;
1266 }
1267
1268 static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
1269 unsigned int __user *value)
1270 {
1271 unsigned int mcr ;
1272 unsigned int arg;
1273 unsigned char data;
1274
1275 struct usb_serial_port *port;
1276
1277 if (mos7720_port == NULL)
1278 return -1;
1279
1280 port = (struct usb_serial_port *)mos7720_port->port;
1281 mcr = mos7720_port->shadowMCR;
1282
1283 if (copy_from_user(&arg, value, sizeof(int)))
1284 return -EFAULT;
1285
1286 switch (cmd) {
1287 case TIOCMBIS:
1288 if (arg & TIOCM_RTS)
1289 mcr |= UART_MCR_RTS;
1290 if (arg & TIOCM_DTR)
1291 mcr |= UART_MCR_RTS;
1292 if (arg & TIOCM_LOOP)
1293 mcr |= UART_MCR_LOOP;
1294 break;
1295
1296 case TIOCMBIC:
1297 if (arg & TIOCM_RTS)
1298 mcr &= ~UART_MCR_RTS;
1299 if (arg & TIOCM_DTR)
1300 mcr &= ~UART_MCR_RTS;
1301 if (arg & TIOCM_LOOP)
1302 mcr &= ~UART_MCR_LOOP;
1303 break;
1304
1305 case TIOCMSET:
1306 /* turn off the RTS and DTR and LOOPBACK
1307 * and then only turn on what was asked to */
1308 mcr &= ~(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_LOOP);
1309 mcr |= ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0);
1310 mcr |= ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0);
1311 mcr |= ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0);
1312 break;
1313 }
1314
1315 mos7720_port->shadowMCR = mcr;
1316
1317 data = mos7720_port->shadowMCR;
1318 send_mos_cmd(port->serial, MOS_WRITE,
1319 port->number - port->serial->minor, UART_MCR, &data);
1320
1321 return 0;
1322 }
1323
1324 static int get_modem_info(struct moschip_port *mos7720_port,
1325 unsigned int __user *value)
1326 {
1327 unsigned int result = 0;
1328 unsigned int msr = mos7720_port->shadowMSR;
1329 unsigned int mcr = mos7720_port->shadowMCR;
1330
1331 result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1332 | ((mcr & UART_MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1333 | ((msr & UART_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1334 | ((msr & UART_MSR_DCD) ? TIOCM_CAR: 0) /* 0x040 */
1335 | ((msr & UART_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1336 | ((msr & UART_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1337
1338
1339 dbg("%s -- %x", __func__, result);
1340
1341 if (copy_to_user(value, &result, sizeof(int)))
1342 return -EFAULT;
1343 return 0;
1344 }
1345
1346 static int get_serial_info(struct moschip_port *mos7720_port,
1347 struct serial_struct __user *retinfo)
1348 {
1349 struct serial_struct tmp;
1350
1351 if (!retinfo)
1352 return -EFAULT;
1353
1354 memset(&tmp, 0, sizeof(tmp));
1355
1356 tmp.type = PORT_16550A;
1357 tmp.line = mos7720_port->port->serial->minor;
1358 tmp.port = mos7720_port->port->number;
1359 tmp.irq = 0;
1360 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1361 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
1362 tmp.baud_base = 9600;
1363 tmp.close_delay = 5*HZ;
1364 tmp.closing_wait = 30*HZ;
1365
1366 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1367 return -EFAULT;
1368 return 0;
1369 }
1370
1371 static int mos7720_ioctl(struct tty_struct *tty, struct file *file,
1372 unsigned int cmd, unsigned long arg)
1373 {
1374 struct usb_serial_port *port = tty->driver_data;
1375 struct moschip_port *mos7720_port;
1376 struct async_icount cnow;
1377 struct async_icount cprev;
1378 struct serial_icounter_struct icount;
1379
1380 mos7720_port = usb_get_serial_port_data(port);
1381 if (mos7720_port == NULL)
1382 return -ENODEV;
1383
1384 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1385
1386 switch (cmd) {
1387 case TIOCSERGETLSR:
1388 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
1389 return get_lsr_info(tty, mos7720_port,
1390 (unsigned int __user *)arg);
1391 return 0;
1392
1393 /* FIXME: These should be using the mode methods */
1394 case TIOCMBIS:
1395 case TIOCMBIC:
1396 case TIOCMSET:
1397 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET",
1398 __func__, port->number);
1399 return set_modem_info(mos7720_port, cmd,
1400 (unsigned int __user *)arg);
1401
1402 case TIOCMGET:
1403 dbg("%s (%d) TIOCMGET", __func__, port->number);
1404 return get_modem_info(mos7720_port,
1405 (unsigned int __user *)arg);
1406
1407 case TIOCGSERIAL:
1408 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
1409 return get_serial_info(mos7720_port,
1410 (struct serial_struct __user *)arg);
1411
1412 case TIOCMIWAIT:
1413 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
1414 cprev = mos7720_port->icount;
1415 while (1) {
1416 if (signal_pending(current))
1417 return -ERESTARTSYS;
1418 cnow = mos7720_port->icount;
1419 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1420 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1421 return -EIO; /* no change => error */
1422 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1423 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1424 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1425 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1426 return 0;
1427 }
1428 cprev = cnow;
1429 }
1430 /* NOTREACHED */
1431 break;
1432
1433 case TIOCGICOUNT:
1434 cnow = mos7720_port->icount;
1435 icount.cts = cnow.cts;
1436 icount.dsr = cnow.dsr;
1437 icount.rng = cnow.rng;
1438 icount.dcd = cnow.dcd;
1439 icount.rx = cnow.rx;
1440 icount.tx = cnow.tx;
1441 icount.frame = cnow.frame;
1442 icount.overrun = cnow.overrun;
1443 icount.parity = cnow.parity;
1444 icount.brk = cnow.brk;
1445 icount.buf_overrun = cnow.buf_overrun;
1446
1447 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
1448 port->number, icount.rx, icount.tx);
1449 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1450 return -EFAULT;
1451 return 0;
1452 }
1453
1454 return -ENOIOCTLCMD;
1455 }
1456
1457 static int mos7720_startup(struct usb_serial *serial)
1458 {
1459 struct moschip_serial *mos7720_serial;
1460 struct moschip_port *mos7720_port;
1461 struct usb_device *dev;
1462 int i;
1463 char data;
1464
1465 dbg("%s: Entering ..........", __func__);
1466
1467 if (!serial) {
1468 dbg("Invalid Handler");
1469 return -ENODEV;
1470 }
1471
1472 dev = serial->dev;
1473
1474 /* create our private serial structure */
1475 mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL);
1476 if (mos7720_serial == NULL) {
1477 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
1478 return -ENOMEM;
1479 }
1480
1481 usb_set_serial_data(serial, mos7720_serial);
1482
1483 /* we set up the pointers to the endpoints in the mos7720_open *
1484 * function, as the structures aren't created yet. */
1485
1486 /* set up port private structures */
1487 for (i = 0; i < serial->num_ports; ++i) {
1488 mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
1489 if (mos7720_port == NULL) {
1490 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
1491 usb_set_serial_data(serial, NULL);
1492 kfree(mos7720_serial);
1493 return -ENOMEM;
1494 }
1495
1496 /* Initialize all port interrupt end point to port 0 int
1497 * endpoint. Our device has only one interrupt endpoint
1498 * comman to all ports */
1499 serial->port[i]->interrupt_in_endpointAddress =
1500 serial->port[0]->interrupt_in_endpointAddress;
1501
1502 mos7720_port->port = serial->port[i];
1503 usb_set_serial_port_data(serial->port[i], mos7720_port);
1504
1505 dbg("port number is %d", serial->port[i]->number);
1506 dbg("serial number is %d", serial->minor);
1507 }
1508
1509
1510 /* setting configuration feature to one */
1511 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1512 (__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5*HZ);
1513
1514 /* LSR For Port 1 */
1515 send_mos_cmd(serial, MOS_READ, 0x00, UART_LSR, &data);
1516 dbg("LSR:%x", data);
1517
1518 /* LSR For Port 2 */
1519 send_mos_cmd(serial, MOS_READ, 0x01, UART_LSR, &data);
1520 dbg("LSR:%x", data);
1521
1522 return 0;
1523 }
1524
1525 static void mos7720_shutdown(struct usb_serial *serial)
1526 {
1527 int i;
1528
1529 /* free private structure allocated for serial port */
1530 for (i = 0; i < serial->num_ports; ++i) {
1531 kfree(usb_get_serial_port_data(serial->port[i]));
1532 usb_set_serial_port_data(serial->port[i], NULL);
1533 }
1534
1535 /* free private structure allocated for serial device */
1536 kfree(usb_get_serial_data(serial));
1537 usb_set_serial_data(serial, NULL);
1538 }
1539
1540 static struct usb_driver usb_driver = {
1541 .name = "moschip7720",
1542 .probe = usb_serial_probe,
1543 .disconnect = usb_serial_disconnect,
1544 .id_table = moschip_port_id_table,
1545 .no_dynamic_id = 1,
1546 };
1547
1548 static struct usb_serial_driver moschip7720_2port_driver = {
1549 .driver = {
1550 .owner = THIS_MODULE,
1551 .name = "moschip7720",
1552 },
1553 .description = "Moschip 2 port adapter",
1554 .usb_driver = &usb_driver,
1555 .id_table = moschip_port_id_table,
1556 .num_ports = 2,
1557 .open = mos7720_open,
1558 .close = mos7720_close,
1559 .throttle = mos7720_throttle,
1560 .unthrottle = mos7720_unthrottle,
1561 .attach = mos7720_startup,
1562 .shutdown = mos7720_shutdown,
1563 .ioctl = mos7720_ioctl,
1564 .set_termios = mos7720_set_termios,
1565 .write = mos7720_write,
1566 .write_room = mos7720_write_room,
1567 .chars_in_buffer = mos7720_chars_in_buffer,
1568 .break_ctl = mos7720_break,
1569 .read_bulk_callback = mos7720_bulk_in_callback,
1570 .read_int_callback = mos7720_interrupt_callback,
1571 };
1572
1573 static int __init moschip7720_init(void)
1574 {
1575 int retval;
1576
1577 dbg("%s: Entering ..........", __func__);
1578
1579 /* Register with the usb serial */
1580 retval = usb_serial_register(&moschip7720_2port_driver);
1581 if (retval)
1582 goto failed_port_device_register;
1583
1584 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1585 DRIVER_DESC "\n");
1586
1587 /* Register with the usb */
1588 retval = usb_register(&usb_driver);
1589 if (retval)
1590 goto failed_usb_register;
1591
1592 return 0;
1593
1594 failed_usb_register:
1595 usb_serial_deregister(&moschip7720_2port_driver);
1596
1597 failed_port_device_register:
1598 return retval;
1599 }
1600
1601 static void __exit moschip7720_exit(void)
1602 {
1603 usb_deregister(&usb_driver);
1604 usb_serial_deregister(&moschip7720_2port_driver);
1605 }
1606
1607 module_init(moschip7720_init);
1608 module_exit(moschip7720_exit);
1609
1610 /* Module information */
1611 MODULE_AUTHOR(DRIVER_AUTHOR);
1612 MODULE_DESCRIPTION(DRIVER_DESC);
1613 MODULE_LICENSE("GPL");
1614
1615 module_param(debug, bool, S_IRUGO | S_IWUSR);
1616 MODULE_PARM_DESC(debug, "Debug enabled or not");
Ubuntu Artful kernel mirror