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authorGreg Kroah-Hartman <gregkh@suse.de>2002-04-09 15:14:34 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-10-17 17:46:32 -0400
commit0f64478cbc7a008fe7b7e9ae79a73d8a6904ead8 (patch)
treece55416f6efd38a7383e99e843a826f17bd58f93 /drivers/usb/serial/mos7720.c
parent9fcde235270e6783600d1aee5bcda78c8282bcdd (diff)
USB: add USB serial mos7720 driver
Add support for Moschip 7720 USB dual port usb to serial device. This driver is originally based on the drivers/usb/io_edgeport.c driver. Cleaned up and forward ported by me. Cc: VijayaKumar <vijaykumar@aspirecom.net> Cc: AjayKumar <ajay@aspirecom.net> Cc: Gurudeva <gurudev@aspirecom.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial/mos7720.c')
-rw-r--r--drivers/usb/serial/mos7720.c1683
1 files changed, 1683 insertions, 0 deletions
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
new file mode 100644
index 000000000000..82cd15b894b0
--- /dev/null
+++ b/drivers/usb/serial/mos7720.c
@@ -0,0 +1,1683 @@
1/*
2 * mos7720.c
3 * Controls the Moschip 7720 usb to dual port serial convertor
4 *
5 * Copyright 2006 Moschip Semiconductor Tech. Ltd.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, version 2 of the License.
10 *
11 * Developed by:
12 * VijayaKumar.G.N. <vijaykumar@aspirecom.net>
13 * AjayKumar <ajay@aspirecom.net>
14 * Gurudeva.N. <gurudev@aspirecom.net>
15 *
16 * Cleaned up from the original by:
17 * Greg Kroah-Hartman <gregkh@suse.de>
18 *
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
22 */
23#include <linux/kernel.h>
24#include <linux/errno.h>
25#include <linux/init.h>
26#include <linux/slab.h>
27#include <linux/tty.h>
28#include <linux/tty_driver.h>
29#include <linux/tty_flip.h>
30#include <linux/module.h>
31#include <linux/spinlock.h>
32#include <linux/serial.h>
33#include <linux/serial_reg.h>
34#include <linux/usb.h>
35#include <linux/usb/serial.h>
36#include <asm/uaccess.h>
37
38
39/*
40 * Version Information
41 */
42#define DRIVER_VERSION "1.0.0.4F"
43#define DRIVER_AUTHOR "Aspire Communications pvt Ltd."
44#define DRIVER_DESC "Moschip USB Serial Driver"
45
46/* default urb timeout */
47#define MOS_WDR_TIMEOUT (HZ * 5)
48
49#define MOS_PORT1 0x0200
50#define MOS_PORT2 0x0300
51#define MOS_VENREG 0x0000
52#define MOS_MAX_PORT 0x02
53#define MOS_WRITE 0x0E
54#define MOS_READ 0x0D
55
56/* Interrupt Rotinue Defines */
57#define SERIAL_IIR_RLS 0x06
58#define SERIAL_IIR_RDA 0x04
59#define SERIAL_IIR_CTI 0x0c
60#define SERIAL_IIR_THR 0x02
61#define SERIAL_IIR_MS 0x00
62
63#define NUM_URBS 16 /* URB Count */
64#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
65
66/* This structure holds all of the local port information */
67struct 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 */
79struct moschip_serial
80{
81 int interrupt_started;
82};
83
84static 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
90static struct usb_device_id moschip_port_id_table [] = {
91 { USB_DEVICE(USB_VENDOR_ID_MOSCHIP,MOSCHIP_DEVICE_ID_7720) },
92 { } /* terminating entry */
93};
94MODULE_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 */
102static void mos7720_interrupt_callback(struct urb *urb)
103{
104 int result;
105 int length;
106 __u32 *data;
107 unsigned int status;
108 __u8 sp1;
109 __u8 sp2;
110 __u8 st;
111
112 dbg("%s"," : Entering\n");
113
114 if (!urb) {
115 dbg("%s","Invalid Pointer !!!!:\n");
116 return;
117 }
118
119 switch (urb->status) {
120 case 0:
121 /* success */
122 break;
123 case -ECONNRESET:
124 case -ENOENT:
125 case -ESHUTDOWN:
126 /* this urb is terminated, clean up */
127 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
128 urb->status);
129 return;
130 default:
131 dbg("%s - nonzero urb status received: %d", __FUNCTION__,
132 urb->status);
133 goto exit;
134 }
135
136 length = urb->actual_length;
137 data = urb->transfer_buffer;
138
139 /* Moschip get 4 bytes
140 * Byte 1 IIR Port 1 (port.number is 0)
141 * Byte 2 IIR Port 2 (port.number is 1)
142 * Byte 3 --------------
143 * Byte 4 FIFO status for both */
144 if (length && length > 4) {
145 dbg("Wrong data !!!");
146 return;
147 }
148
149 status = *data;
150
151 sp1 = (status & 0xff000000)>>24;
152 sp2 = (status & 0x00ff0000)>>16;
153 st = status & 0x000000ff;
154
155 if ((sp1 & 0x01) || (sp2 & 0x01)) {
156 /* No Interrupt Pending in both the ports */
157 dbg("No Interrupt !!!");
158 } else {
159 switch (sp1 & 0x0f) {
160 case SERIAL_IIR_RLS:
161 dbg("Serial Port 1: Receiver status error or address "
162 "bit detected in 9-bit mode\n");
163 break;
164 case SERIAL_IIR_CTI:
165 dbg("Serial Port 1: Receiver time out");
166 break;
167 case SERIAL_IIR_MS:
168 dbg("Serial Port 1: Modem status change");
169 break;
170 }
171
172 switch (sp2 & 0x0f) {
173 case SERIAL_IIR_RLS:
174 dbg("Serial Port 2: Receiver status error or address "
175 "bit detected in 9-bit mode");
176 break;
177 case SERIAL_IIR_CTI:
178 dbg("Serial Port 2: Receiver time out");
179 break;
180 case SERIAL_IIR_MS:
181 dbg("Serial Port 2: Modem status change");
182 break;
183 }
184 }
185
186exit:
187 result = usb_submit_urb(urb, GFP_ATOMIC);
188 if (result)
189 dev_err(&urb->dev->dev,
190 "%s - Error %d submitting control urb\n",
191 __FUNCTION__, result);
192 return;
193}
194
195/*
196 * mos7720_bulk_in_callback
197 * this is the callback function for when we have received data on the
198 * bulk in endpoint.
199 */
200static void mos7720_bulk_in_callback(struct urb *urb)
201{
202 int status;
203 unsigned char *data ;
204 struct usb_serial_port *port;
205 struct moschip_port *mos7720_port;
206 struct tty_struct *tty;
207
208 if (urb->status) {
209 dbg("nonzero read bulk status received: %d",urb->status);
210 return;
211 }
212
213 mos7720_port = urb->context;
214 if (!mos7720_port) {
215 dbg("%s","NULL mos7720_port pointer \n");
216 return ;
217 }
218
219 port = mos7720_port->port;
220
221 dbg("Entering...%s", __FUNCTION__);
222
223 data = urb->transfer_buffer;
224
225 tty = port->tty;
226 if (tty && urb->actual_length) {
227 tty_buffer_request_room(tty, urb->actual_length);
228 tty_insert_flip_string(tty, data, urb->actual_length);
229 tty_flip_buffer_push(tty);
230 }
231
232 if (!port->read_urb) {
233 dbg("URB KILLED !!!");
234 return;
235 }
236
237 if (port->read_urb->status != -EINPROGRESS) {
238 port->read_urb->dev = port->serial->dev;
239
240 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
241 if (status)
242 dbg("usb_submit_urb(read bulk) failed, status = %d",
243 status);
244 }
245}
246
247/*
248 * mos7720_bulk_out_data_callback
249 * this is the callback function for when we have finished sending serial
250 * data on the bulk out endpoint.
251 */
252static void mos7720_bulk_out_data_callback(struct urb *urb)
253{
254 struct moschip_port *mos7720_port;
255 struct tty_struct *tty;
256
257 if (urb->status) {
258 dbg("nonzero write bulk status received:%d", urb->status);
259 return;
260 }
261
262 mos7720_port = urb->context;
263 if (!mos7720_port) {
264 dbg("NULL mos7720_port pointer");
265 return ;
266 }
267
268 dbg("Entering .........");
269
270 tty = mos7720_port->port->tty;
271
272 if (tty && mos7720_port->open) {
273 /* let the tty driver wakeup if it has a special *
274 * write_wakeup function */
275 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
276 tty->ldisc.write_wakeup)
277 (tty->ldisc.write_wakeup)(tty);
278
279 /* tell the tty driver that something has changed */
280 wake_up_interruptible(&tty->write_wait);
281 }
282
283 /* schedule_work(&mos7720_port->port->work); */
284}
285
286/*
287 * send_mos_cmd
288 * this function will be used for sending command to device
289 */
290static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value,
291 __u16 index, void *data)
292{
293 int status;
294 unsigned int pipe;
295 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
296 __u8 requesttype;
297 __u16 size = 0x0000;
298
299 if (value < MOS_MAX_PORT) {
300 if (product == MOSCHIP_DEVICE_ID_7715) {
301 value = value*0x100+0x100;
302 } else {
303 value = value*0x100+0x200;
304 }
305 } else {
306 value = 0x0000;
307 if ((product == MOSCHIP_DEVICE_ID_7715) &&
308 (index != 0x08)) {
309 dbg("serial->product== MOSCHIP_DEVICE_ID_7715");
310 //index = 0x01 ;
311 }
312 }
313
314 if (request == MOS_WRITE) {
315 request = (__u8)MOS_WRITE;
316 requesttype = (__u8)0x40;
317 value = value + (__u16)*((unsigned char *)data);
318 data = NULL;
319 pipe = usb_sndctrlpipe(serial->dev, 0);
320 } else {
321 request = (__u8)MOS_READ;
322 requesttype = (__u8)0xC0;
323 size = 0x01;
324 pipe = usb_rcvctrlpipe(serial->dev,0);
325 }
326
327 status = usb_control_msg(serial->dev, pipe, request, requesttype,
328 value, index, data, size, MOS_WDR_TIMEOUT);
329
330 if (status < 0)
331 dbg("Command Write failed Value %x index %x\n",value,index);
332
333 return status;
334}
335
336static int mos7720_open(struct usb_serial_port *port, struct file * filp)
337{
338 struct usb_serial *serial;
339 struct usb_serial_port *port0;
340 struct urb *urb;
341 struct moschip_serial *mos7720_serial;
342 struct moschip_port *mos7720_port;
343 int response;
344 int port_number;
345 char data;
346 int j;
347
348 serial = port->serial;
349
350 mos7720_port = usb_get_serial_port_data(port);
351 if (mos7720_port == NULL)
352 return -ENODEV;
353
354 port0 = serial->port[0];
355
356 mos7720_serial = usb_get_serial_data(serial);
357
358 if (mos7720_serial == NULL || port0 == NULL)
359 return -ENODEV;
360
361 usb_clear_halt(serial->dev, port->write_urb->pipe);
362 usb_clear_halt(serial->dev, port->read_urb->pipe);
363
364 /* Initialising the write urb pool */
365 for (j = 0; j < NUM_URBS; ++j) {
366 urb = usb_alloc_urb(0,SLAB_ATOMIC);
367 mos7720_port->write_urb_pool[j] = urb;
368
369 if (urb == NULL) {
370 err("No more urbs???");
371 continue;
372 }
373
374 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
375 GFP_KERNEL);
376 if (!urb->transfer_buffer) {
377 err("%s-out of memory for urb buffers.", __FUNCTION__);
378 continue;
379 }
380 }
381
382 /* Initialize MCS7720 -- Write Init values to corresponding Registers
383 *
384 * Register Index
385 * 1 : IER
386 * 2 : FCR
387 * 3 : LCR
388 * 4 : MCR
389 *
390 * 0x08 : SP1/2 Control Reg
391 */
392 port_number = port->number - port->serial->minor;
393 send_mos_cmd(port->serial, MOS_READ, port_number, UART_LSR, &data);
394 dbg("SS::%p LSR:%x\n",mos7720_port, data);
395
396 dbg("Check:Sending Command ..........");
397
398 data = 0x02;
399 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x01, &data);
400 data = 0x02;
401 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x02, &data);
402
403 data = 0x00;
404 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
405 data = 0x00;
406 send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
407
408 data = 0xCF;
409 send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
410 data = 0x03;
411 mos7720_port->shadowLCR = data;
412 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
413 data = 0x0b;
414 mos7720_port->shadowMCR = data;
415 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
416 data = 0x0b;
417 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
418
419 data = 0x00;
420 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
421 data = 0x00;
422 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
423
424/* data = 0x00;
425 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, port_number + 1, &data);
426 data = 0x03;
427 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
428 data = 0x00;
429 send_mos_cmd(port->serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
430*/
431 data = 0x00;
432 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
433
434 data = data | (port->number - port->serial->minor + 1);
435 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
436
437 data = 0x83;
438 mos7720_port->shadowLCR = data;
439 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
440 data = 0x0c;
441 send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
442 data = 0x00;
443 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
444 data = 0x03;
445 mos7720_port->shadowLCR = data;
446 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
447 data = 0x0c;
448 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
449 data = 0x0c;
450 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
451
452//Matrix
453
454 /* force low_latency on so that our tty_push actually forces *
455 * the data through,otherwise it is scheduled, and with *
456 * high data rates (like with OHCI) data can get lost. */
457
458 if (port->tty)
459 port->tty->low_latency = 1;
460
461 /* see if we've set up our endpoint info yet *
462 * (can't set it up in mos7720_startup as the *
463 * structures were not set up at that time.) */
464 if (!mos7720_serial->interrupt_started) {
465 dbg("Interrupt buffer NULL !!!");
466
467 /* not set up yet, so do it now */
468 mos7720_serial->interrupt_started = 1;
469
470 dbg("To Submit URB !!!");
471
472 /* set up our interrupt urb */
473 usb_fill_int_urb(port0->interrupt_in_urb, serial->dev,
474 usb_rcvintpipe(serial->dev,
475 port->interrupt_in_endpointAddress),
476 port0->interrupt_in_buffer,
477 port0->interrupt_in_urb->transfer_buffer_length,
478 mos7720_interrupt_callback, mos7720_port,
479 port0->interrupt_in_urb->interval);
480
481 /* start interrupt read for this mos7720 this interrupt *
482 * will continue as long as the mos7720 is connected */
483 dbg("Submit URB over !!!");
484 response = usb_submit_urb(port0->interrupt_in_urb, GFP_KERNEL);
485 if (response)
486 dev_err(&port->dev,
487 "%s - Error %d submitting control urb",
488 __FUNCTION__, response);
489 }
490
491 /* set up our bulk in urb */
492 usb_fill_bulk_urb(port->read_urb, serial->dev,
493 usb_rcvbulkpipe(serial->dev,
494 port->bulk_in_endpointAddress),
495 port->bulk_in_buffer,
496 port->read_urb->transfer_buffer_length,
497 mos7720_bulk_in_callback, mos7720_port);
498 response = usb_submit_urb(port->read_urb, GFP_KERNEL);
499 if (response)
500 dev_err(&port->dev,
501 "%s - Error %d submitting read urb", __FUNCTION__, response);
502
503 /* initialize our icount structure */
504 memset(&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount));
505
506 /* initialize our port settings */
507 mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */
508
509 /* send a open port command */
510 mos7720_port->open = 1;
511
512 return 0;
513}
514
515/*
516 * mos7720_chars_in_buffer
517 * this function is called by the tty driver when it wants to know how many
518 * bytes of data we currently have outstanding in the port (data that has
519 * been written, but hasn't made it out the port yet)
520 * If successful, we return the number of bytes left to be written in the
521 * system,
522 * Otherwise we return a negative error number.
523 */
524static int mos7720_chars_in_buffer(struct usb_serial_port *port)
525{
526 int i;
527 int chars = 0;
528 struct moschip_port *mos7720_port;
529
530 dbg("%s:entering ...........", __FUNCTION__);
531
532 mos7720_port = usb_get_serial_port_data(port);
533 if (mos7720_port == NULL) {
534 dbg("%s:leaving ...........", __FUNCTION__);
535 return -ENODEV;
536 }
537
538 for (i = 0; i < NUM_URBS; ++i) {
539 if (mos7720_port->write_urb_pool[i]->status == -EINPROGRESS)
540 chars += URB_TRANSFER_BUFFER_SIZE;
541 }
542 dbg("%s - returns %d", __FUNCTION__, chars);
543 return chars;
544}
545
546static void mos7720_close(struct usb_serial_port *port, struct file *filp)
547{
548 struct usb_serial *serial;
549 struct moschip_port *mos7720_port;
550 char data;
551 int j;
552
553 dbg("mos7720_close:entering...");
554
555 serial = port->serial;
556
557 mos7720_port = usb_get_serial_port_data(port);
558 if (mos7720_port == NULL)
559 return;
560
561 for (j = 0; j < NUM_URBS; ++j)
562 usb_kill_urb(mos7720_port->write_urb_pool[j]);
563
564 /* Freeing Write URBs */
565 for (j = 0; j < NUM_URBS; ++j) {
566 if (mos7720_port->write_urb_pool[j]) {
567 kfree(mos7720_port->write_urb_pool[j]->transfer_buffer);
568 usb_free_urb(mos7720_port->write_urb_pool[j]);
569 }
570 }
571
572 /* While closing port, shutdown all bulk read, write *
573 * and interrupt read if they exists */
574 if (serial->dev) {
575 dbg("Shutdown bulk write");
576 usb_kill_urb(port->write_urb);
577 dbg("Shutdown bulk read");
578 usb_kill_urb(port->read_urb);
579 }
580
581 data = 0x00;
582 send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
583 0x04, &data);
584
585 data = 0x00;
586 send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
587 0x01, &data);
588
589 mos7720_port->open = 0;
590
591 dbg("Leaving %s", __FUNCTION__);
592}
593
594static void mos7720_break(struct usb_serial_port *port, int break_state)
595{
596 unsigned char data;
597 struct usb_serial *serial;
598 struct moschip_port *mos7720_port;
599
600 dbg("Entering %s", __FUNCTION__);
601
602 serial = port->serial;
603
604 mos7720_port = usb_get_serial_port_data(port);
605 if (mos7720_port == NULL)
606 return;
607
608 if (break_state == -1)
609 data = mos7720_port->shadowLCR | UART_LCR_SBC;
610 else
611 data = mos7720_port->shadowLCR & ~UART_LCR_SBC;
612
613 mos7720_port->shadowLCR = data;
614 send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
615 0x03, &data);
616
617 return;
618}
619
620/*
621 * mos7720_write_room
622 * this function is called by the tty driver when it wants to know how many
623 * bytes of data we can accept for a specific port.
624 * If successful, we return the amount of room that we have for this port
625 * Otherwise we return a negative error number.
626 */
627static int mos7720_write_room(struct usb_serial_port *port)
628{
629 struct moschip_port *mos7720_port;
630 int room = 0;
631 int i;
632
633 dbg("%s:entering ...........", __FUNCTION__);
634
635 mos7720_port = usb_get_serial_port_data(port);
636 if (mos7720_port == NULL) {
637 dbg("%s:leaving ...........", __FUNCTION__);
638 return -ENODEV;
639 }
640
641 for (i = 0; i < NUM_URBS; ++i) {
642 if (mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
643 room += URB_TRANSFER_BUFFER_SIZE;
644 }
645
646 dbg("%s - returns %d", __FUNCTION__, room);
647 return room;
648}
649
650static int mos7720_write(struct usb_serial_port *port,
651 const unsigned char *data, int count)
652{
653 int status;
654 int i;
655 int bytes_sent = 0;
656 int transfer_size;
657
658 struct moschip_port *mos7720_port;
659 struct usb_serial *serial;
660 struct urb *urb;
661 const unsigned char *current_position = data;
662
663 dbg("%s:entering ...........", __FUNCTION__);
664
665 serial = port->serial;
666
667 mos7720_port = usb_get_serial_port_data(port);
668 if (mos7720_port == NULL) {
669 dbg("mos7720_port is NULL");
670 return -ENODEV;
671 }
672
673 /* try to find a free urb in the list */
674 urb = NULL;
675
676 for (i = 0; i < NUM_URBS; ++i) {
677 if (mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) {
678 urb = mos7720_port->write_urb_pool[i];
679 dbg("URB:%d",i);
680 break;
681 }
682 }
683
684 if (urb == NULL) {
685 dbg("%s - no more free urbs", __FUNCTION__);
686 goto exit;
687 }
688
689 if (urb->transfer_buffer == NULL) {
690 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
691 GFP_KERNEL);
692 if (urb->transfer_buffer == NULL) {
693 err("%s no more kernel memory...", __FUNCTION__);
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, __FUNCTION__, 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 err("%s - usb_submit_urb(write bulk) failed with status = %d",
714 __FUNCTION__, status);
715 bytes_sent = status;
716 goto exit;
717 }
718 bytes_sent = transfer_size;
719
720exit:
721 return bytes_sent;
722}
723
724static void mos7720_throttle(struct usb_serial_port *port)
725{
726 struct moschip_port *mos7720_port;
727 struct tty_struct *tty;
728 int status;
729
730 dbg("%s- port %d\n", __FUNCTION__, 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 ..........", __FUNCTION__);
743
744 tty = port->tty;
745 if (!tty) {
746 dbg("%s - no tty available", __FUNCTION__);
747 return;
748 }
749
750 /* if we are implementing XON/XOFF, send the stop character */
751 if (I_IXOFF(tty)) {
752 unsigned char stop_char = STOP_CHAR(tty);
753 status = mos7720_write(port, &stop_char, 1);
754 if (status <= 0)
755 return;
756 }
757
758 /* if we are implementing RTS/CTS, toggle that line */
759 if (tty->termios->c_cflag & CRTSCTS) {
760 mos7720_port->shadowMCR &= ~UART_MCR_RTS;
761 status = send_mos_cmd(port->serial, MOS_WRITE,
762 port->number - port->serial->minor,
763 UART_MCR, &mos7720_port->shadowMCR);
764 if (status != 0)
765 return;
766 }
767}
768
769static void mos7720_unthrottle(struct usb_serial_port *port)
770{
771 struct tty_struct *tty;
772 int status;
773 struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
774
775 if (mos7720_port == NULL)
776 return;
777
778 if (!mos7720_port->open) {
779 dbg("%s - port not opened", __FUNCTION__);
780 return;
781 }
782
783 dbg("%s: Entering ..........", __FUNCTION__);
784
785 tty = port->tty;
786 if (!tty) {
787 dbg("%s - no tty available", __FUNCTION__);
788 return;
789 }
790
791 /* if we are implementing XON/XOFF, send the start character */
792 if (I_IXOFF(tty)) {
793 unsigned char start_char = START_CHAR(tty);
794 status = mos7720_write(port, &start_char, 1);
795 if (status <= 0)
796 return;
797 }
798
799 /* if we are implementing RTS/CTS, toggle that line */
800 if (tty->termios->c_cflag & CRTSCTS) {
801 mos7720_port->shadowMCR |= UART_MCR_RTS;
802 status = send_mos_cmd(port->serial, MOS_WRITE,
803 port->number - port->serial->minor,
804 UART_MCR, &mos7720_port->shadowMCR);
805 if (status != 0)
806 return;
807 }
808}
809
810static int set_higher_rates(struct moschip_port *mos7720_port,
811 unsigned int baud)
812{
813 unsigned char data;
814 struct usb_serial_port *port;
815 struct usb_serial *serial;
816 int port_number;
817
818 if (mos7720_port == NULL)
819 return -EINVAL;
820
821 port = mos7720_port->port;
822 serial = port->serial;
823
824 /***********************************************
825 * Init Sequence for higher rates
826 ***********************************************/
827 dbg("Sending Setting Commands ..........");
828 port_number = port->number - port->serial->minor;
829
830 data = 0x000;
831 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
832 data = 0x000;
833 send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
834 data = 0x0CF;
835 send_mos_cmd(serial, MOS_WRITE, port->number, 0x02, &data);
836 data = 0x00b;
837 mos7720_port->shadowMCR = data;
838 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
839 data = 0x00b;
840 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
841
842 data = 0x000;
843 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
844 data = 0x000;
845 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
846
847
848 /***********************************************
849 * Set for higher rates *
850 ***********************************************/
851
852 data = baud * 0x10;
853 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1,&data);
854
855 data = 0x003;
856 send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
857 data = 0x003;
858 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
859
860 data = 0x02b;
861 mos7720_port->shadowMCR = data;
862 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
863 data = 0x02b;
864 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
865
866 /***********************************************
867 * Set DLL/DLM
868 ***********************************************/
869
870 data = mos7720_port->shadowLCR | UART_LCR_DLAB;
871 mos7720_port->shadowLCR = data;
872 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
873
874 data = 0x001; /* DLL */
875 send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
876 data = 0x000; /* DLM */
877 send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
878
879 data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
880 mos7720_port->shadowLCR = data;
881 send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
882
883 return 0;
884}
885
886/* baud rate information */
887struct divisor_table_entry
888{
889 __u32 baudrate;
890 __u16 divisor;
891};
892
893/* Define table of divisors for moschip 7720 hardware *
894 * These assume a 3.6864MHz crystal, the standard /16, and *
895 * MCR.7 = 0. */
896static struct divisor_table_entry divisor_table[] = {
897 { 50, 2304},
898 { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */
899 { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */
900 { 150, 768},
901 { 300, 384},
902 { 600, 192},
903 { 1200, 96},
904 { 1800, 64},
905 { 2400, 48},
906 { 4800, 24},
907 { 7200, 16},
908 { 9600, 12},
909 { 19200, 6},
910 { 38400, 3},
911 { 57600, 2},
912 { 115200, 1},
913};
914
915/*****************************************************************************
916 * calc_baud_rate_divisor
917 * this function calculates the proper baud rate divisor for the specified
918 * baud rate.
919 *****************************************************************************/
920static int calc_baud_rate_divisor(int baudrate, int *divisor)
921{
922 int i;
923 __u16 custom;
924 __u16 round1;
925 __u16 round;
926
927
928 dbg("%s - %d", __FUNCTION__, baudrate);
929
930 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
931 if (divisor_table[i].baudrate == baudrate) {
932 *divisor = divisor_table[i].divisor;
933 return 0;
934 }
935 }
936
937 /* After trying for all the standard baud rates *
938 * Try calculating the divisor for this baud rate */
939 if (baudrate > 75 && baudrate < 230400) {
940 /* get the divisor */
941 custom = (__u16)(230400L / baudrate);
942
943 /* Check for round off */
944 round1 = (__u16)(2304000L / baudrate);
945 round = (__u16)(round1 - (custom * 10));
946 if (round > 4)
947 custom++;
948 *divisor = custom;
949
950 dbg("Baud %d = %d",baudrate, custom);
951 return 0;
952 }
953
954 dbg("Baud calculation Failed...");
955 return -EINVAL;
956}
957
958/*
959 * send_cmd_write_baud_rate
960 * this function sends the proper command to change the baud rate of the
961 * specified port.
962 */
963static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port,
964 int baudrate)
965{
966 struct usb_serial_port *port;
967 struct usb_serial *serial;
968 int divisor;
969 int status;
970 unsigned char data;
971 unsigned char number;
972
973 if (mos7720_port == NULL)
974 return -1;
975
976 port = mos7720_port->port;
977 serial = port->serial;
978
979 dbg("%s: Entering ..........", __FUNCTION__);
980
981 number = port->number - port->serial->minor;
982 dbg("%s - port = %d, baud = %d", __FUNCTION__, port->number, baudrate);
983
984 /* Calculate the Divisor */
985 status = calc_baud_rate_divisor(baudrate, &divisor);
986 if (status) {
987 err("%s - bad baud rate", __FUNCTION__);
988 return status;
989 }
990
991 /* Enable access to divisor latch */
992 data = mos7720_port->shadowLCR | UART_LCR_DLAB;
993 mos7720_port->shadowLCR = data;
994 send_mos_cmd(serial, MOS_WRITE, number, UART_LCR, &data);
995
996 /* Write the divisor */
997 data = ((unsigned char)(divisor & 0xff));
998 send_mos_cmd(serial, MOS_WRITE, number, 0x00, &data);
999
1000 data = ((unsigned char)((divisor & 0xff00) >> 8));
1001 send_mos_cmd(serial, MOS_WRITE, number, 0x01, &data);
1002
1003 /* Disable access to divisor latch */
1004 data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
1005 mos7720_port->shadowLCR = data;
1006 send_mos_cmd(serial, MOS_WRITE, number, 0x03, &data);
1007
1008 return status;
1009}
1010
1011/*
1012 * change_port_settings
1013 * This routine is called to set the UART on the device to match
1014 * the specified new settings.
1015 */
1016static void change_port_settings(struct moschip_port *mos7720_port,
1017 struct termios *old_termios)
1018{
1019 struct usb_serial_port *port;
1020 struct usb_serial *serial;
1021 struct tty_struct *tty;
1022 int baud;
1023 unsigned cflag;
1024 unsigned iflag;
1025 __u8 mask = 0xff;
1026 __u8 lData;
1027 __u8 lParity;
1028 __u8 lStop;
1029 int status;
1030 int port_number;
1031 char data;
1032
1033 if (mos7720_port == NULL)
1034 return ;
1035
1036 port = mos7720_port->port;
1037 serial = port->serial;
1038 port_number = port->number - port->serial->minor;
1039
1040 dbg("%s - port %d", __FUNCTION__, port->number);
1041
1042 if (!mos7720_port->open) {
1043 dbg("%s - port not opened", __FUNCTION__);
1044 return;
1045 }
1046
1047 tty = mos7720_port->port->tty;
1048
1049 if ((!tty) || (!tty->termios)) {
1050 dbg("%s - no tty structures", __FUNCTION__);
1051 return;
1052 }
1053
1054 dbg("%s: Entering ..........", __FUNCTION__);
1055
1056 lData = UART_LCR_WLEN8;
1057 lStop = 0x00; /* 1 stop bit */
1058 lParity = 0x00; /* No parity */
1059
1060 cflag = tty->termios->c_cflag;
1061 iflag = tty->termios->c_iflag;
1062
1063 /* Change the number of bits */
1064 switch (cflag & CSIZE) {
1065 case CS5:
1066 lData = UART_LCR_WLEN5;
1067 mask = 0x1f;
1068 break;
1069
1070 case CS6:
1071 lData = UART_LCR_WLEN6;
1072 mask = 0x3f;
1073 break;
1074
1075 case CS7:
1076 lData = UART_LCR_WLEN7;
1077 mask = 0x7f;
1078 break;
1079 default:
1080 case CS8:
1081 lData = UART_LCR_WLEN8;
1082 break;
1083 }
1084
1085 /* Change the Parity bit */
1086 if (cflag & PARENB) {
1087 if (cflag & PARODD) {
1088 lParity = UART_LCR_PARITY;
1089 dbg("%s - parity = odd", __FUNCTION__);
1090 } else {
1091 lParity = (UART_LCR_EPAR | UART_LCR_PARITY);
1092 dbg("%s - parity = even", __FUNCTION__);
1093 }
1094
1095 } else {
1096 dbg("%s - parity = none", __FUNCTION__);
1097 }
1098
1099 if (cflag & CMSPAR)
1100 lParity = lParity | 0x20;
1101
1102 /* Change the Stop bit */
1103 if (cflag & CSTOPB) {
1104 lStop = UART_LCR_STOP;
1105 dbg("%s - stop bits = 2", __FUNCTION__);
1106 } else {
1107 lStop = 0x00;
1108 dbg("%s - stop bits = 1", __FUNCTION__);
1109 }
1110
1111#define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
1112#define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
1113#define LCR_PAR_MASK 0x38 /* Mask for parity field */
1114
1115 /* Update the LCR with the correct value */
1116 mos7720_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1117 mos7720_port->shadowLCR |= (lData | lParity | lStop);
1118
1119
1120 /* Disable Interrupts */
1121 data = 0x00;
1122 send_mos_cmd(serial,MOS_WRITE,port->number - port->serial->minor, UART_IER, &data);
1123
1124 data = 0x00;
1125 send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
1126
1127 data = 0xcf;
1128 send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
1129
1130 /* Send the updated LCR value to the mos7720 */
1131 data = mos7720_port->shadowLCR;
1132 send_mos_cmd(serial, MOS_WRITE, port_number, UART_LCR, &data);
1133
1134 data = 0x00b;
1135 mos7720_port->shadowMCR = data;
1136 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
1137 data = 0x00b;
1138 send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
1139
1140 /* set up the MCR register and send it to the mos7720 */
1141 mos7720_port->shadowMCR = UART_MCR_OUT2;
1142 if (cflag & CBAUD)
1143 mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS);
1144
1145 if (cflag & CRTSCTS) {
1146 mos7720_port->shadowMCR |= (UART_MCR_XONANY);
1147
1148 /* To set hardware flow control to the specified *
1149 * serial port, in SP1/2_CONTROL_REG */
1150 if (port->number) {
1151 data = 0x001;
1152 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
1153 0x08, &data);
1154 } else {
1155 data = 0x002;
1156 send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
1157 0x08, &data);
1158 }
1159 } else {
1160 mos7720_port->shadowMCR &= ~(UART_MCR_XONANY);
1161 }
1162
1163 data = mos7720_port->shadowMCR;
1164 send_mos_cmd(serial, MOS_WRITE, port_number, UART_MCR, &data);
1165
1166 /* Determine divisor based on baud rate */
1167 baud = tty_get_baud_rate(tty);
1168 if (!baud) {
1169 /* pick a default, any default... */
1170 dbg("Picked default baud...");
1171 baud = 9600;
1172 }
1173
1174 if (baud >= 230400) {
1175 set_higher_rates(mos7720_port, baud);
1176 /* Enable Interrupts */
1177 data = 0x0c;
1178 send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
1179 return;
1180 }
1181
1182 dbg("%s - baud rate = %d", __FUNCTION__, baud);
1183 status = send_cmd_write_baud_rate(mos7720_port, baud);
1184
1185 /* Enable Interrupts */
1186 data = 0x0c;
1187 send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
1188
1189 if (port->read_urb->status != -EINPROGRESS) {
1190 port->read_urb->dev = serial->dev;
1191
1192 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1193 if (status)
1194 dbg("usb_submit_urb(read bulk) failed, status = %d",
1195 status);
1196 }
1197 return;
1198}
1199
1200/*
1201 * mos7720_set_termios
1202 * this function is called by the tty driver when it wants to change the
1203 * termios structure.
1204 */
1205static void mos7720_set_termios(struct usb_serial_port *port,
1206 struct termios *old_termios)
1207{
1208 int status;
1209 unsigned int cflag;
1210 struct usb_serial *serial;
1211 struct moschip_port *mos7720_port;
1212 struct tty_struct *tty;
1213
1214 serial = port->serial;
1215
1216 mos7720_port = usb_get_serial_port_data(port);
1217
1218 if (mos7720_port == NULL)
1219 return;
1220
1221 tty = port->tty;
1222
1223 if (!port->tty || !port->tty->termios) {
1224 dbg("%s - no tty or termios", __FUNCTION__);
1225 return;
1226 }
1227
1228 if (!mos7720_port->open) {
1229 dbg("%s - port not opened", __FUNCTION__);
1230 return;
1231 }
1232
1233 dbg("%s\n","setting termios - ASPIRE");
1234
1235 cflag = tty->termios->c_cflag;
1236
1237 if (!cflag) {
1238 printk("%s %s\n",__FUNCTION__,"cflag is NULL");
1239 return;
1240 }
1241
1242 /* check that they really want us to change something */
1243 if (old_termios) {
1244 if ((cflag == old_termios->c_cflag) &&
1245 (RELEVANT_IFLAG(tty->termios->c_iflag) ==
1246 RELEVANT_IFLAG(old_termios->c_iflag))) {
1247 dbg("Nothing to change");
1248 return;
1249 }
1250 }
1251
1252 dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
1253 tty->termios->c_cflag,
1254 RELEVANT_IFLAG(tty->termios->c_iflag));
1255
1256 if (old_termios)
1257 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
1258 old_termios->c_cflag,
1259 RELEVANT_IFLAG(old_termios->c_iflag));
1260
1261 dbg("%s - port %d", __FUNCTION__, port->number);
1262
1263 /* change the port settings to the new ones specified */
1264 change_port_settings(mos7720_port, old_termios);
1265
1266 if(!port->read_urb) {
1267 dbg("%s","URB KILLED !!!!!\n");
1268 return;
1269 }
1270
1271 if(port->read_urb->status != -EINPROGRESS) {
1272 port->read_urb->dev = serial->dev;
1273 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1274 if (status)
1275 dbg("usb_submit_urb(read bulk) failed, status = %d",
1276 status);
1277 }
1278 return;
1279}
1280
1281/*
1282 * get_lsr_info - get line status register info
1283 *
1284 * Purpose: Let user call ioctl() to get info when the UART physically
1285 * is emptied. On bus types like RS485, the transmitter must
1286 * release the bus after transmitting. This must be done when
1287 * the transmit shift register is empty, not be done when the
1288 * transmit holding register is empty. This functionality
1289 * allows an RS485 driver to be written in user space.
1290 */
1291static int get_lsr_info(struct moschip_port *mos7720_port,
1292 unsigned int __user *value)
1293{
1294 int count;
1295 unsigned int result = 0;
1296
1297 count = mos7720_chars_in_buffer(mos7720_port->port);
1298 if (count == 0) {
1299 dbg("%s -- Empty", __FUNCTION__);
1300 result = TIOCSER_TEMT;
1301 }
1302
1303 if (copy_to_user(value, &result, sizeof(int)))
1304 return -EFAULT;
1305 return 0;
1306}
1307
1308/*
1309 * get_number_bytes_avail - get number of bytes available
1310 *
1311 * Purpose: Let user call ioctl to get the count of number of bytes available.
1312 */
1313static int get_number_bytes_avail(struct moschip_port *mos7720_port,
1314 unsigned int __user *value)
1315{
1316 unsigned int result = 0;
1317 struct tty_struct *tty = mos7720_port->port->tty;
1318
1319 if (!tty)
1320 return -ENOIOCTLCMD;
1321
1322 result = tty->read_cnt;
1323
1324 dbg("%s(%d) = %d", __FUNCTION__, mos7720_port->port->number, result);
1325 if (copy_to_user(value, &result, sizeof(int)))
1326 return -EFAULT;
1327
1328 return -ENOIOCTLCMD;
1329}
1330
1331static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
1332 unsigned int __user *value)
1333{
1334 unsigned int mcr ;
1335 unsigned int arg;
1336 unsigned char data;
1337
1338 struct usb_serial_port *port;
1339
1340 if (mos7720_port == NULL)
1341 return -1;
1342
1343 port = (struct usb_serial_port*)mos7720_port->port;
1344 mcr = mos7720_port->shadowMCR;
1345
1346 if (copy_from_user(&arg, value, sizeof(int)))
1347 return -EFAULT;
1348
1349 switch (cmd) {
1350 case TIOCMBIS:
1351 if (arg & TIOCM_RTS)
1352 mcr |= UART_MCR_RTS;
1353 if (arg & TIOCM_DTR)
1354 mcr |= UART_MCR_RTS;
1355 if (arg & TIOCM_LOOP)
1356 mcr |= UART_MCR_LOOP;
1357 break;
1358
1359 case TIOCMBIC:
1360 if (arg & TIOCM_RTS)
1361 mcr &= ~UART_MCR_RTS;
1362 if (arg & TIOCM_DTR)
1363 mcr &= ~UART_MCR_RTS;
1364 if (arg & TIOCM_LOOP)
1365 mcr &= ~UART_MCR_LOOP;
1366 break;
1367
1368 case TIOCMSET:
1369 /* turn off the RTS and DTR and LOOPBACK
1370 * and then only turn on what was asked to */
1371 mcr &= ~(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_LOOP);
1372 mcr |= ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0);
1373 mcr |= ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0);
1374 mcr |= ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0);
1375 break;
1376 }
1377
1378 mos7720_port->shadowMCR = mcr;
1379
1380 data = mos7720_port->shadowMCR;
1381 send_mos_cmd(port->serial, MOS_WRITE,
1382 port->number - port->serial->minor, UART_MCR, &data);
1383
1384 return 0;
1385}
1386
1387static int get_modem_info(struct moschip_port *mos7720_port,
1388 unsigned int __user *value)
1389{
1390 unsigned int result = 0;
1391 unsigned int msr = mos7720_port->shadowMSR;
1392 unsigned int mcr = mos7720_port->shadowMCR;
1393
1394 result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1395 | ((mcr & UART_MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1396 | ((msr & UART_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1397 | ((msr & UART_MSR_DCD) ? TIOCM_CAR: 0) /* 0x040 */
1398 | ((msr & UART_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1399 | ((msr & UART_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1400
1401
1402 dbg("%s -- %x", __FUNCTION__, result);
1403
1404 if (copy_to_user(value, &result, sizeof(int)))
1405 return -EFAULT;
1406 return 0;
1407}
1408
1409static int get_serial_info(struct moschip_port *mos7720_port,
1410 struct serial_struct __user *retinfo)
1411{
1412 struct serial_struct tmp;
1413
1414 if (!retinfo)
1415 return -EFAULT;
1416
1417 memset(&tmp, 0, sizeof(tmp));
1418
1419 tmp.type = PORT_16550A;
1420 tmp.line = mos7720_port->port->serial->minor;
1421 tmp.port = mos7720_port->port->number;
1422 tmp.irq = 0;
1423 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1424 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
1425 tmp.baud_base = 9600;
1426 tmp.close_delay = 5*HZ;
1427 tmp.closing_wait = 30*HZ;
1428
1429 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1430 return -EFAULT;
1431 return 0;
1432}
1433
1434static int mos7720_ioctl(struct usb_serial_port *port, struct file *file,
1435 unsigned int cmd, unsigned long arg)
1436{
1437 struct moschip_port *mos7720_port;
1438 struct async_icount cnow;
1439 struct async_icount cprev;
1440 struct serial_icounter_struct icount;
1441
1442 mos7720_port = usb_get_serial_port_data(port);
1443 if (mos7720_port == NULL)
1444 return -ENODEV;
1445
1446 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
1447
1448 switch (cmd) {
1449 case TIOCINQ:
1450 /* return number of bytes available */
1451 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
1452 return get_number_bytes_avail(mos7720_port,
1453 (unsigned int __user *)arg);
1454 break;
1455
1456 case TIOCSERGETLSR:
1457 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
1458 return get_lsr_info(mos7720_port, (unsigned int __user *)arg);
1459 return 0;
1460
1461 case TIOCMBIS:
1462 case TIOCMBIC:
1463 case TIOCMSET:
1464 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,
1465 port->number);
1466 return set_modem_info(mos7720_port, cmd,
1467 (unsigned int __user *)arg);
1468
1469 case TIOCMGET:
1470 dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number);
1471 return get_modem_info(mos7720_port,
1472 (unsigned int __user *)arg);
1473
1474 case TIOCGSERIAL:
1475 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
1476 return get_serial_info(mos7720_port,
1477 (struct serial_struct __user *)arg);
1478
1479 case TIOCSSERIAL:
1480 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
1481 break;
1482
1483 case TIOCMIWAIT:
1484 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
1485 cprev = mos7720_port->icount;
1486 while (1) {
1487 if (signal_pending(current))
1488 return -ERESTARTSYS;
1489 cnow = mos7720_port->icount;
1490 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1491 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1492 return -EIO; /* no change => error */
1493 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1494 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1495 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1496 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1497 return 0;
1498 }
1499 cprev = cnow;
1500 }
1501 /* NOTREACHED */
1502 break;
1503
1504 case TIOCGICOUNT:
1505 cnow = mos7720_port->icount;
1506 icount.cts = cnow.cts;
1507 icount.dsr = cnow.dsr;
1508 icount.rng = cnow.rng;
1509 icount.dcd = cnow.dcd;
1510 icount.rx = cnow.rx;
1511 icount.tx = cnow.tx;
1512 icount.frame = cnow.frame;
1513 icount.overrun = cnow.overrun;
1514 icount.parity = cnow.parity;
1515 icount.brk = cnow.brk;
1516 icount.buf_overrun = cnow.buf_overrun;
1517
1518 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,
1519 port->number, icount.rx, icount.tx );
1520 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1521 return -EFAULT;
1522 return 0;
1523 }
1524
1525 return -ENOIOCTLCMD;
1526}
1527
1528static int mos7720_startup(struct usb_serial *serial)
1529{
1530 struct moschip_serial *mos7720_serial;
1531 struct moschip_port *mos7720_port;
1532 struct usb_device *dev;
1533 int i;
1534 char data;
1535
1536 dbg("%s: Entering ..........", __FUNCTION__);
1537
1538 if (!serial) {
1539 dbg("Invalid Handler");
1540 return -ENODEV;
1541 }
1542
1543 dev = serial->dev;
1544
1545 /* create our private serial structure */
1546 mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL);
1547 if (mos7720_serial == NULL) {
1548 err("%s - Out of memory", __FUNCTION__);
1549 return -ENOMEM;
1550 }
1551
1552 usb_set_serial_data(serial, mos7720_serial);
1553
1554 /* we set up the pointers to the endpoints in the mos7720_open *
1555 * function, as the structures aren't created yet. */
1556
1557 /* set up port private structures */
1558 for (i = 0; i < serial->num_ports; ++i) {
1559 mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
1560 if (mos7720_port == NULL) {
1561 err("%s - Out of memory", __FUNCTION__);
1562 usb_set_serial_data(serial, NULL);
1563 kfree(mos7720_serial);
1564 return -ENOMEM;
1565 }
1566
1567 /* Initialize all port interrupt end point to port 0 int
1568 * endpoint. Our device has only one interrupt endpoint
1569 * comman to all ports */
1570 serial->port[i]->interrupt_in_endpointAddress = serial->port[0]->interrupt_in_endpointAddress;
1571
1572 mos7720_port->port = serial->port[i];
1573 usb_set_serial_port_data(serial->port[i], mos7720_port);
1574
1575 dbg("port number is %d", serial->port[i]->number);
1576 dbg("serial number is %d", serial->minor);
1577 }
1578
1579
1580 /* setting configuration feature to one */
1581 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1582 (__u8)0x03, 0x00,0x01,0x00, NULL, 0x00, 5*HZ);
1583
1584 send_mos_cmd(serial,MOS_READ,0x00, UART_LSR, &data); // LSR For Port 1
1585 dbg("LSR:%x",data);
1586
1587 send_mos_cmd(serial,MOS_READ,0x01, UART_LSR, &data); // LSR For Port 2
1588 dbg("LSR:%x",data);
1589
1590 return 0;
1591}
1592
1593static void mos7720_shutdown(struct usb_serial *serial)
1594{
1595 int i;
1596
1597 /* free private structure allocated for serial port */
1598 for (i=0; i < serial->num_ports; ++i) {
1599 kfree(usb_get_serial_port_data(serial->port[i]));
1600 usb_set_serial_port_data(serial->port[i], NULL);
1601 }
1602
1603 /* free private structure allocated for serial device */
1604 kfree(usb_get_serial_data(serial));
1605 usb_set_serial_data(serial, NULL);
1606}
1607
1608static struct usb_serial_driver moschip7720_2port_driver = {
1609 .driver = {
1610 .owner = THIS_MODULE,
1611 .name = "moschip7720",
1612 },
1613 .description = "Moschip 2 port adapter",
1614 .id_table = moschip_port_id_table,
1615 .num_interrupt_in = 1,
1616 .num_bulk_in = 2,
1617 .num_bulk_out = 2,
1618 .num_ports = 2,
1619 .open = mos7720_open,
1620 .close = mos7720_close,
1621 .throttle = mos7720_throttle,
1622 .unthrottle = mos7720_unthrottle,
1623 .attach = mos7720_startup,
1624 .shutdown = mos7720_shutdown,
1625 .ioctl = mos7720_ioctl,
1626 .set_termios = mos7720_set_termios,
1627 .write = mos7720_write,
1628 .write_room = mos7720_write_room,
1629 .chars_in_buffer = mos7720_chars_in_buffer,
1630 .break_ctl = mos7720_break,
1631 .read_bulk_callback = mos7720_bulk_in_callback,
1632};
1633
1634static struct usb_driver usb_driver = {
1635 .name = "moschip7720",
1636 .probe = usb_serial_probe,
1637 .disconnect = usb_serial_disconnect,
1638 .id_table = moschip_port_id_table,
1639};
1640
1641static int __init moschip7720_init(void)
1642{
1643 int retval;
1644
1645 dbg("%s: Entering ..........", __FUNCTION__);
1646
1647 /* Register with the usb serial */
1648 retval = usb_serial_register(&moschip7720_2port_driver);
1649 if (retval)
1650 goto failed_port_device_register;
1651
1652 info(DRIVER_DESC " " DRIVER_VERSION);
1653
1654 /* Register with the usb */
1655 retval = usb_register(&usb_driver);
1656 if (retval)
1657 goto failed_usb_register;
1658
1659 return 0;
1660
1661failed_usb_register:
1662 usb_serial_deregister(&moschip7720_2port_driver);
1663
1664failed_port_device_register:
1665 return retval;
1666}
1667
1668static void __exit moschip7720_exit(void)
1669{
1670 usb_deregister(&usb_driver);
1671 usb_serial_deregister(&moschip7720_2port_driver);
1672}
1673
1674module_init(moschip7720_init);
1675module_exit(moschip7720_exit);
1676
1677/* Module information */
1678MODULE_AUTHOR( DRIVER_AUTHOR );
1679MODULE_DESCRIPTION( DRIVER_DESC );
1680MODULE_LICENSE("GPL");
1681
1682module_param(debug, bool, S_IRUGO | S_IWUSR);
1683MODULE_PARM_DESC(debug, "Debug enabled or not");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 23:24:01 -0500