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USB: io_edgeport race condition in counters
[deliverable/linux.git] / drivers / usb / serial / mos7840.c
CommitLineData
3f542974
PS		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 *
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
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 */
24
25#include <linux/kernel.h>
26#include <linux/errno.h>
27#include <linux/init.h>
28#include <linux/slab.h>
29#include <linux/tty.h>
30#include <linux/tty_driver.h>
31#include <linux/tty_flip.h>
32#include <linux/module.h>
33#include <linux/serial.h>
34#include <linux/usb.h>
35#include <linux/usb/serial.h>
36#include <asm/uaccess.h>
37
38/*
39 * Version Information
40 */
41#define DRIVER_VERSION "1.3.1"
42#define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
43
44/*
45 * 16C50 UART register defines
46 */
47
48#define LCR_BITS_5 0x00 /* 5 bits/char */
49#define LCR_BITS_6 0x01 /* 6 bits/char */
50#define LCR_BITS_7 0x02 /* 7 bits/char */
51#define LCR_BITS_8 0x03 /* 8 bits/char */
52#define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
53
54#define LCR_STOP_1 0x00 /* 1 stop bit */
55#define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
56#define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
57#define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
58
59#define LCR_PAR_NONE 0x00 /* No parity */
60#define LCR_PAR_ODD 0x08 /* Odd parity */
61#define LCR_PAR_EVEN 0x18 /* Even parity */
62#define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
63#define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
64#define LCR_PAR_MASK 0x38 /* Mask for parity field */
65
66#define LCR_SET_BREAK 0x40 /* Set Break condition */
67#define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
68
69#define MCR_DTR 0x01 /* Assert DTR */
70#define MCR_RTS 0x02 /* Assert RTS */
71#define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
72#define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
73#define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
74#define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
75
76#define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
77#define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
78#define MOS7840_MSR_RI 0x40 /* Current state of RI */
79#define MOS7840_MSR_CD 0x80 /* Current state of CD */
80
81/*
82 * Defines used for sending commands to port
83 */
84
85#define WAIT_FOR_EVER (HZ * 0 ) /* timeout urb is wait for ever */
86#define MOS_WDR_TIMEOUT (HZ * 5 ) /* default urb timeout */
87
88#define MOS_PORT1 0x0200
89#define MOS_PORT2 0x0300
90#define MOS_VENREG 0x0000
91#define MOS_MAX_PORT 0x02
92#define MOS_WRITE 0x0E
93#define MOS_READ 0x0D
94
95/* Requests */
96#define MCS_RD_RTYPE 0xC0
97#define MCS_WR_RTYPE 0x40
98#define MCS_RDREQ 0x0D
99#define MCS_WRREQ 0x0E
100#define MCS_CTRL_TIMEOUT 500
101#define VENDOR_READ_LENGTH (0x01)
102
103#define MAX_NAME_LEN 64
104
105#define ZLP_REG1 0x3A //Zero_Flag_Reg1 58
106#define ZLP_REG5 0x3E //Zero_Flag_Reg5 62
107
108/* For higher baud Rates use TIOCEXBAUD */
109#define TIOCEXBAUD 0x5462
110
111/* vendor id and device id defines */
112
113#define USB_VENDOR_ID_MOSCHIP 0x9710
114#define MOSCHIP_DEVICE_ID_7840 0x7840
115#define MOSCHIP_DEVICE_ID_7820 0x7820
116
117/* Interrupt Rotinue Defines */
118
119#define SERIAL_IIR_RLS 0x06
120#define SERIAL_IIR_MS 0x00
121
122/*
123 * Emulation of the bit mask on the LINE STATUS REGISTER.
124 */
125#define SERIAL_LSR_DR 0x0001
126#define SERIAL_LSR_OE 0x0002
127#define SERIAL_LSR_PE 0x0004
128#define SERIAL_LSR_FE 0x0008
129#define SERIAL_LSR_BI 0x0010
130
131#define MOS_MSR_DELTA_CTS 0x10
132#define MOS_MSR_DELTA_DSR 0x20
133#define MOS_MSR_DELTA_RI 0x40
134#define MOS_MSR_DELTA_CD 0x80
135
136// Serial Port register Address
137#define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
138#define FIFO_CONTROL_REGISTER ((__u16)(0x02))
139#define LINE_CONTROL_REGISTER ((__u16)(0x03))
140#define MODEM_CONTROL_REGISTER ((__u16)(0x04))
141#define LINE_STATUS_REGISTER ((__u16)(0x05))
142#define MODEM_STATUS_REGISTER ((__u16)(0x06))
143#define SCRATCH_PAD_REGISTER ((__u16)(0x07))
144#define DIVISOR_LATCH_LSB ((__u16)(0x00))
145#define DIVISOR_LATCH_MSB ((__u16)(0x01))
146
147#define CLK_MULTI_REGISTER ((__u16)(0x02))
148#define CLK_START_VALUE_REGISTER ((__u16)(0x03))
149
150#define SERIAL_LCR_DLAB ((__u16)(0x0080))
151
152/*
153 * URB POOL related defines
154 */
155#define NUM_URBS 16 /* URB Count */
156#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
157
158
159static struct usb_device_id moschip_port_id_table[] = {
160 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
161 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
162 {} /* terminating entry */
163};
164
165static __devinitdata struct usb_device_id moschip_id_table_combined[] = {
166 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
167 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
168 {} /* terminating entry */
169};
170
171MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
172
173/* This structure holds all of the local port information */
174
175struct moschip_port {
176 int port_num; /*Actual port number in the device(1,2,etc) */
177 struct urb *write_urb; /* write URB for this port */
178 struct urb *read_urb; /* read URB for this port */
179 __u8 shadowLCR; /* last LCR value received */
180 __u8 shadowMCR; /* last MCR value received */
181 char open;
182 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
183 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
184 int delta_msr_cond;
185 struct async_icount icount;
186 struct usb_serial_port *port; /* loop back to the owner of this object */
187
188 /*Offsets */
189 __u8 SpRegOffset;
190 __u8 ControlRegOffset;
191 __u8 DcrRegOffset;
192 //for processing control URBS in interrupt context
193 struct urb *control_urb;
194 char *ctrl_buf;
195 int MsrLsr;
196
197 struct urb *write_urb_pool[NUM_URBS];
198};
199
200
201static int debug;
202static int mos7840_num_ports; //this says the number of ports in the device
203static int mos7840_num_open_ports;
204
205
206/*
207 * mos7840_set_reg_sync
208 * To set the Control register by calling usb_fill_control_urb function
209 * by passing usb_sndctrlpipe function as parameter.
210 */
211
212static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
213 __u16 val)
214{
215 struct usb_device *dev = port->serial->dev;
216 val = val & 0x00ff;
217 dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
218
219 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
220 MCS_WR_RTYPE, val, reg, NULL, 0,
221 MOS_WDR_TIMEOUT);
222}
223
224/*
225 * mos7840_get_reg_sync
226 * To set the Uart register by calling usb_fill_control_urb function by
227 * passing usb_rcvctrlpipe function as parameter.
228 */
229
230static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
231 __u16 * val)
232{
233 struct usb_device *dev = port->serial->dev;
234 int ret = 0;
235
236 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
237 MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH,
238 MOS_WDR_TIMEOUT);
239 dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val);
240 *val = (*val) & 0x00ff;
241 return ret;
242}
243
244/*
245 * mos7840_set_uart_reg
246 * To set the Uart register by calling usb_fill_control_urb function by
247 * passing usb_sndctrlpipe function as parameter.
248 */
249
250static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
251 __u16 val)
252{
253
254 struct usb_device *dev = port->serial->dev;
255 val = val & 0x00ff;
256 // For the UART control registers, the application number need to be Or'ed
257 if (mos7840_num_ports == 4) {
258 val |=
259 (((__u16) port->number - (__u16) (port->serial->minor)) +
260 1) << 8;
261 dbg("mos7840_set_uart_reg application number is %x\n", val);
262 } else {
263 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
264 val |=
265 (((__u16) port->number -
266 (__u16) (port->serial->minor)) + 1) << 8;
267 dbg("mos7840_set_uart_reg application number is %x\n",
268 val);
269 } else {
270 val |=
271 (((__u16) port->number -
272 (__u16) (port->serial->minor)) + 2) << 8;
273 dbg("mos7840_set_uart_reg application number is %x\n",
274 val);
275 }
276 }
277 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
278 MCS_WR_RTYPE, val, reg, NULL, 0,
279 MOS_WDR_TIMEOUT);
280
281}
282
283/*
284 * mos7840_get_uart_reg
285 * To set the Control register by calling usb_fill_control_urb function
286 * by passing usb_rcvctrlpipe function as parameter.
287 */
288static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
289 __u16 * val)
290{
291 struct usb_device *dev = port->serial->dev;
292 int ret = 0;
293 __u16 Wval;
294
295 //dbg("application number is %4x \n",(((__u16)port->number - (__u16)(port->serial->minor))+1)<<8);
296 /*Wval is same as application number */
297 if (mos7840_num_ports == 4) {
298 Wval =
299 (((__u16) port->number - (__u16) (port->serial->minor)) +
300 1) << 8;
301 dbg("mos7840_get_uart_reg application number is %x\n", Wval);
302 } else {
303 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
304 Wval =
305 (((__u16) port->number -
306 (__u16) (port->serial->minor)) + 1) << 8;
307 dbg("mos7840_get_uart_reg application number is %x\n",
308 Wval);
309 } else {
310 Wval =
311 (((__u16) port->number -
312 (__u16) (port->serial->minor)) + 2) << 8;
313 dbg("mos7840_get_uart_reg application number is %x\n",
314 Wval);
315 }
316 }
317 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
318 MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH,
319 MOS_WDR_TIMEOUT);
320 *val = (*val) & 0x00ff;
321 return ret;
322}
323
324static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
325{
326
327 dbg("***************************************\n");
328 dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
329 dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset);
330 dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset);
331 dbg("***************************************\n");
332
333}
334
335/************************************************************************/
336/************************************************************************/
337/* I N T E R F A C E F U N C T I O N S */
338/* I N T E R F A C E F U N C T I O N S */
339/************************************************************************/
340/************************************************************************/
341
342static inline void mos7840_set_port_private(struct usb_serial_port *port,
343 struct moschip_port *data)
344{
345 usb_set_serial_port_data(port, (void *)data);
346}
347
348static inline struct moschip_port *mos7840_get_port_private(struct
349 usb_serial_port
350 *port)
351{
352 return (struct moschip_port *)usb_get_serial_port_data(port);
353}
354
355static int mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
356{
357 struct moschip_port *mos7840_port;
358 struct async_icount *icount;
359 mos7840_port = port;
360 icount = &mos7840_port->icount;
361 if (new_msr &
362 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
363 MOS_MSR_DELTA_CD)) {
364 icount = &mos7840_port->icount;
365
366 /* update input line counters */
367 if (new_msr & MOS_MSR_DELTA_CTS) {
368 icount->cts++;
369 }
370 if (new_msr & MOS_MSR_DELTA_DSR) {
371 icount->dsr++;
372 }
373 if (new_msr & MOS_MSR_DELTA_CD) {
374 icount->dcd++;
375 }
376 if (new_msr & MOS_MSR_DELTA_RI) {
377 icount->rng++;
378 }
379 }
380
381 return 0;
382}
383
384static int mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
385{
386 struct async_icount *icount;
387
388 dbg("%s - %02x", __FUNCTION__, new_lsr);
389
390 if (new_lsr & SERIAL_LSR_BI) {
391 //
392 // Parity and Framing errors only count if they
393 // occur exclusive of a break being
394 // received.
395 //
396 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
397 }
398
399 /* update input line counters */
400 icount = &port->icount;
401 if (new_lsr & SERIAL_LSR_BI) {
402 icount->brk++;
403 }
404 if (new_lsr & SERIAL_LSR_OE) {
405 icount->overrun++;
406 }
407 if (new_lsr & SERIAL_LSR_PE) {
408 icount->parity++;
409 }
410 if (new_lsr & SERIAL_LSR_FE) {
411 icount->frame++;
412 }
413
414 return 0;
415}
416
417/************************************************************************/
418/************************************************************************/
419/* U S B C A L L B A C K F U N C T I O N S */
420/* U S B C A L L B A C K F U N C T I O N S */
421/************************************************************************/
422/************************************************************************/
423
7d12e780 424static void mos7840_control_callback(struct urb *urb)
3f542974
PS		 425{
426 unsigned char *data;
427 struct moschip_port *mos7840_port;
428 __u8 regval = 0x0;
429
430 if (!urb) {
431 dbg("%s", "Invalid Pointer !!!!:\n");
432 return;
433 }
434
435 switch (urb->status) {
436 case 0:
437 /* success */
438 break;
439 case -ECONNRESET:
440 case -ENOENT:
441 case -ESHUTDOWN:
442 /* this urb is terminated, clean up */
443 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
444 urb->status);
445 return;
446 default:
447 dbg("%s - nonzero urb status received: %d", __FUNCTION__,
448 urb->status);
449 goto exit;
450 }
451
452 mos7840_port = (struct moschip_port *)urb->context;
453
454 dbg("%s urb buffer size is %d\n", __FUNCTION__, urb->actual_length);
455 dbg("%s mos7840_port->MsrLsr is %d port %d\n", __FUNCTION__,
456 mos7840_port->MsrLsr, mos7840_port->port_num);
457 data = urb->transfer_buffer;
458 regval = (__u8) data[0];
459 dbg("%s data is %x\n", __FUNCTION__, regval);
460 if (mos7840_port->MsrLsr == 0)
461 mos7840_handle_new_msr(mos7840_port, regval);
462 else if (mos7840_port->MsrLsr == 1)
463 mos7840_handle_new_lsr(mos7840_port, regval);
464
465 exit:
466 return;
467}
468
469static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
470 __u16 * val)
471{
472 struct usb_device *dev = mcs->port->serial->dev;
473 struct usb_ctrlrequest *dr = NULL;
474 unsigned char *buffer = NULL;
475 int ret = 0;
476 buffer = (__u8 *) mcs->ctrl_buf;
477
478// dr=(struct usb_ctrlrequest *)(buffer);
479 dr = (void *)(buffer + 2);
480 dr->bRequestType = MCS_RD_RTYPE;
481 dr->bRequest = MCS_RDREQ;
482 dr->wValue = cpu_to_le16(Wval); //0;
483 dr->wIndex = cpu_to_le16(reg);
484 dr->wLength = cpu_to_le16(2);
485
486 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
487 (unsigned char *)dr, buffer, 2,
488 mos7840_control_callback, mcs);
489 mcs->control_urb->transfer_buffer_length = 2;
490 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
491 return ret;
492}
493
494/*****************************************************************************
495 * mos7840_interrupt_callback
496 * this is the callback function for when we have received data on the
497 * interrupt endpoint.
498 *****************************************************************************/
499
7d12e780 500static void mos7840_interrupt_callback(struct urb *urb)
3f542974
PS		 501{
502 int result;
503 int length;
504 struct moschip_port *mos7840_port;
505 struct usb_serial *serial;
506 __u16 Data;
507 unsigned char *data;
508 __u8 sp[5], st;
509 int i;
510 __u16 wval;
511
512 dbg("%s", " : Entering\n");
513 if (!urb) {
514 dbg("%s", "Invalid Pointer !!!!:\n");
515 return;
516 }
517
518 switch (urb->status) {
519 case 0:
520 /* success */
521 break;
522 case -ECONNRESET:
523 case -ENOENT:
524 case -ESHUTDOWN:
525 /* this urb is terminated, clean up */
526 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
527 urb->status);
528 return;
529 default:
530 dbg("%s - nonzero urb status received: %d", __FUNCTION__,
531 urb->status);
532 goto exit;
533 }
534
535 length = urb->actual_length;
536 data = urb->transfer_buffer;
537
538 serial = (struct usb_serial *)urb->context;
539
540 /* Moschip get 5 bytes
541 * Byte 1 IIR Port 1 (port.number is 0)
542 * Byte 2 IIR Port 2 (port.number is 1)
543 * Byte 3 IIR Port 3 (port.number is 2)
544 * Byte 4 IIR Port 4 (port.number is 3)
545 * Byte 5 FIFO status for both */
546
547 if (length && length > 5) {
548 dbg("%s \n", "Wrong data !!!");
549 return;
550 }
551
552 sp[0] = (__u8) data[0];
553 sp[1] = (__u8) data[1];
554 sp[2] = (__u8) data[2];
555 sp[3] = (__u8) data[3];
556 st = (__u8) data[4];
557
558 for (i = 0; i < serial->num_ports; i++) {
559 mos7840_port = mos7840_get_port_private(serial->port[i]);
560 wval =
561 (((__u16) serial->port[i]->number -
562 (__u16) (serial->minor)) + 1) << 8;
563 if (mos7840_port->open) {
564 if (sp[i] & 0x01) {
565 dbg("SP%d No Interrupt !!!\n", i);
566 } else {
567 switch (sp[i] & 0x0f) {
568 case SERIAL_IIR_RLS:
569 dbg("Serial Port %d: Receiver status error or ", i);
570 dbg("address bit detected in 9-bit mode\n");
571 mos7840_port->MsrLsr = 1;
572 mos7840_get_reg(mos7840_port, wval,
573 LINE_STATUS_REGISTER,
574 &Data);
575 break;
576 case SERIAL_IIR_MS:
577 dbg("Serial Port %d: Modem status change\n", i);
578 mos7840_port->MsrLsr = 0;
579 mos7840_get_reg(mos7840_port, wval,
580 MODEM_STATUS_REGISTER,
581 &Data);
582 break;
583 }
584 }
585 }
586 }
587 exit:
588 result = usb_submit_urb(urb, GFP_ATOMIC);
589 if (result) {
590 dev_err(&urb->dev->dev,
591 "%s - Error %d submitting interrupt urb\n",
592 __FUNCTION__, result);
593 }
594
595 return;
596
597}
598
599static int mos7840_port_paranoia_check(struct usb_serial_port *port,
600 const char *function)
601{
602 if (!port) {
603 dbg("%s - port == NULL", function);
604 return -1;
605 }
606 if (!port->serial) {
607 dbg("%s - port->serial == NULL", function);
608 return -1;
609 }
610
611 return 0;
612}
613
614/* Inline functions to check the sanity of a pointer that is passed to us */
615static int mos7840_serial_paranoia_check(struct usb_serial *serial,
616 const char *function)
617{
618 if (!serial) {
619 dbg("%s - serial == NULL", function);
620 return -1;
621 }
622 if (!serial->type) {
623 dbg("%s - serial->type == NULL!", function);
624 return -1;
625 }
626
627 return 0;
628}
629
630static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
631 const char *function)
632{
633 /* if no port was specified, or it fails a paranoia check */
634 if (!port ||
635 mos7840_port_paranoia_check(port, function) ||
636 mos7840_serial_paranoia_check(port->serial, function)) {
637 /* then say that we don't have a valid usb_serial thing, which will * end up genrating -ENODEV return values */
638 return NULL;
639 }
640
641 return port->serial;
642}
643
644/*****************************************************************************
645 * mos7840_bulk_in_callback
646 * this is the callback function for when we have received data on the
647 * bulk in endpoint.
648 *****************************************************************************/
649
7d12e780 650static void mos7840_bulk_in_callback(struct urb *urb)
3f542974
PS		 651{
652 int status;
653 unsigned char *data;
654 struct usb_serial *serial;
655 struct usb_serial_port *port;
656 struct moschip_port *mos7840_port;
657 struct tty_struct *tty;
658
659 if (!urb) {
660 dbg("%s", "Invalid Pointer !!!!:\n");
661 return;
662 }
663
664 if (urb->status) {
665 dbg("nonzero read bulk status received: %d", urb->status);
666 return;
667 }
668
669 mos7840_port = (struct moschip_port *)urb->context;
670 if (!mos7840_port) {
671 dbg("%s", "NULL mos7840_port pointer \n");
672 return;
673 }
674
675 port = (struct usb_serial_port *)mos7840_port->port;
676 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
677 dbg("%s", "Port Paranoia failed \n");
678 return;
679 }
680
681 serial = mos7840_get_usb_serial(port, __FUNCTION__);
682 if (!serial) {
683 dbg("%s\n", "Bad serial pointer ");
684 return;
685 }
686
687 dbg("%s\n", "Entering... \n");
688
689 data = urb->transfer_buffer;
690
691 dbg("%s", "Entering ........... \n");
692
693 if (urb->actual_length) {
694 tty = mos7840_port->port->tty;
695 if (tty) {
696 tty_buffer_request_room(tty, urb->actual_length);
697 tty_insert_flip_string(tty, data, urb->actual_length);
698 dbg(" %s \n", data);
699 tty_flip_buffer_push(tty);
700 }
701 mos7840_port->icount.rx += urb->actual_length;
702 dbg("mos7840_port->icount.rx is %d:\n",
703 mos7840_port->icount.rx);
704 }
705
706 if (!mos7840_port->read_urb) {
707 dbg("%s", "URB KILLED !!!\n");
708 return;
709 }
710
711 if (mos7840_port->read_urb->status != -EINPROGRESS) {
712 mos7840_port->read_urb->dev = serial->dev;
713
714 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
715
716 if (status) {
717 dbg(" usb_submit_urb(read bulk) failed, status = %d",
718 status);
719 }
720 }
721}
722
723/*****************************************************************************
724 * mos7840_bulk_out_data_callback
725 * this is the callback function for when we have finished sending serial data
726 * on the bulk out endpoint.
727 *****************************************************************************/
728
7d12e780 729static void mos7840_bulk_out_data_callback(struct urb *urb)
3f542974
PS		 730{
731 struct moschip_port *mos7840_port;
732 struct tty_struct *tty;
733 if (!urb) {
734 dbg("%s", "Invalid Pointer !!!!:\n");
735 return;
736 }
737
738 if (urb->status) {
739 dbg("nonzero write bulk status received:%d\n", urb->status);
740 return;
741 }
742
743 mos7840_port = (struct moschip_port *)urb->context;
744 if (!mos7840_port) {
745 dbg("%s", "NULL mos7840_port pointer \n");
746 return;
747 }
748
749 if (mos7840_port_paranoia_check(mos7840_port->port, __FUNCTION__)) {
750 dbg("%s", "Port Paranoia failed \n");
751 return;
752 }
753
754 dbg("%s \n", "Entering .........");
755
756 tty = mos7840_port->port->tty;
757
b963a844
JS		 758 if (tty && mos7840_port->open)
759 tty_wakeup(tty);
3f542974
PS		 760
761}
762
763/************************************************************************/
764/* D R I V E R T T Y I N T E R F A C E F U N C T I O N S */
765/************************************************************************/
766#ifdef MCSSerialProbe
767static int mos7840_serial_probe(struct usb_serial *serial,
768 const struct usb_device_id *id)
769{
770
771 /*need to implement the mode_reg reading and updating\
772 structures usb_serial_ device_type\
773 (i.e num_ports, num_bulkin,bulkout etc) */
774 /* Also we can update the changes attach */
775 return 1;
776}
777#endif
778
779/*****************************************************************************
780 * mos7840_open
781 * this function is called by the tty driver when a port is opened
782 * If successful, we return 0
783 * Otherwise we return a negative error number.
784 *****************************************************************************/
785
786static int mos7840_open(struct usb_serial_port *port, struct file *filp)
787{
788 int response;
789 int j;
790 struct usb_serial *serial;
791 struct urb *urb;
792 __u16 Data;
793 int status;
794 struct moschip_port *mos7840_port;
795
796 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
797 dbg("%s", "Port Paranoia failed \n");
798 return -ENODEV;
799 }
800
801 mos7840_num_open_ports++;
802 serial = port->serial;
803
804 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
805 dbg("%s", "Serial Paranoia failed \n");
806 return -ENODEV;
807 }
808
809 mos7840_port = mos7840_get_port_private(port);
810
811 if (mos7840_port == NULL)
812 return -ENODEV;
813
814 usb_clear_halt(serial->dev, port->write_urb->pipe);
815 usb_clear_halt(serial->dev, port->read_urb->pipe);
816
817 /* Initialising the write urb pool */
818 for (j = 0; j < NUM_URBS; ++j) {
54e6ecb2 819 urb = usb_alloc_urb(0, GFP_ATOMIC);
3f542974
PS		 820 mos7840_port->write_urb_pool[j] = urb;
821
822 if (urb == NULL) {
823 err("No more urbs???");
824 continue;
825 }
826
827 urb->transfer_buffer = NULL;
828 urb->transfer_buffer =
829 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
830 if (!urb->transfer_buffer) {
831 err("%s-out of memory for urb buffers.", __FUNCTION__);
832 continue;
833 }
834 }
835
836/*****************************************************************************
837 * Initialize MCS7840 -- Write Init values to corresponding Registers
838 *
839 * Register Index
840 * 1 : IER
841 * 2 : FCR
842 * 3 : LCR
843 * 4 : MCR
844 *
845 * 0x08 : SP1/2 Control Reg
846 *****************************************************************************/
847
848//NEED to check the following Block
849
850 status = 0;
851 Data = 0x0;
852 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
853 if (status < 0) {
854 dbg("Reading Spreg failed\n");
855 return -1;
856 }
857 Data |= 0x80;
858 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
859 if (status < 0) {
860 dbg("writing Spreg failed\n");
861 return -1;
862 }
863
864 Data &= ~0x80;
865 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
866 if (status < 0) {
867 dbg("writing Spreg failed\n");
868 return -1;
869 }
870//End of block to be checked
871
872 status = 0;
873 Data = 0x0;
874 status =
875 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
876 if (status < 0) {
877 dbg("Reading Controlreg failed\n");
878 return -1;
879 }
880 Data |= 0x08; //Driver done bit
881 Data |= 0x20; //rx_disable
882 status = 0;
883 status =
884 mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
885 if (status < 0) {
886 dbg("writing Controlreg failed\n");
887 return -1;
888 }
889 //do register settings here
890 // Set all regs to the device default values.
891 ////////////////////////////////////
892 // First Disable all interrupts.
893 ////////////////////////////////////
894
895 Data = 0x00;
896 status = 0;
897 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
898 if (status < 0) {
899 dbg("disableing interrupts failed\n");
900 return -1;
901 }
902 // Set FIFO_CONTROL_REGISTER to the default value
903 Data = 0x00;
904 status = 0;
905 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
906 if (status < 0) {
907 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
908 return -1;
909 }
910
911 Data = 0xcf;
912 status = 0;
913 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
914 if (status < 0) {
915 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
916 return -1;
917 }
918
919 Data = 0x03;
920 status = 0;
921 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
922 mos7840_port->shadowLCR = Data;
923
924 Data = 0x0b;
925 status = 0;
926 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
927 mos7840_port->shadowMCR = Data;
928
929 Data = 0x00;
930 status = 0;
931 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
932 mos7840_port->shadowLCR = Data;
933
934 Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80
935 status = 0;
936 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
937
938 Data = 0x0c;
939 status = 0;
940 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
941
942 Data = 0x0;
943 status = 0;
944 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
945
946 Data = 0x00;
947 status = 0;
948 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
949
950 Data = Data & ~SERIAL_LCR_DLAB;
951 status = 0;
952 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
953 mos7840_port->shadowLCR = Data;
954
955 //clearing Bulkin and Bulkout Fifo
956 Data = 0x0;
957 status = 0;
958 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
959
960 Data = Data | 0x0c;
961 status = 0;
962 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
963
964 Data = Data & ~0x0c;
965 status = 0;
966 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
967 //Finally enable all interrupts
968 Data = 0x0;
969 Data = 0x0c;
970 status = 0;
971 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
972
973 //clearing rx_disable
974 Data = 0x0;
975 status = 0;
976 status =
977 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
978 Data = Data & ~0x20;
979 status = 0;
980 status =
981 mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
982
983 // rx_negate
984 Data = 0x0;
985 status = 0;
986 status =
987 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
988 Data = Data | 0x10;
989 status = 0;
990 status =
991 mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
992
993 /* force low_latency on so that our tty_push actually forces *
994 * the data through,otherwise it is scheduled, and with *
995 * high data rates (like with OHCI) data can get lost. */
996
997 if (port->tty)
998 port->tty->low_latency = 1;
999/* Check to see if we've set up our endpoint info yet *
1000 * (can't set it up in mos7840_startup as the structures *
1001 * were not set up at that time.) */
1002 if (mos7840_num_open_ports == 1) {
1003 if (serial->port[0]->interrupt_in_buffer == NULL) {
1004
1005 /* set up interrupt urb */
1006
1007 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1008 serial->dev,
1009 usb_rcvintpipe(serial->dev,
1010 serial->port[0]->
1011 interrupt_in_endpointAddress),
1012 serial->port[0]->interrupt_in_buffer,
1013 serial->port[0]->interrupt_in_urb->
1014 transfer_buffer_length,
1015 mos7840_interrupt_callback,
1016 serial,
1017 serial->port[0]->interrupt_in_urb->
1018 interval);
1019
1020 /* start interrupt read for mos7840 *
1021 * will continue as long as mos7840 is connected */
1022
1023 response =
1024 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1025 GFP_KERNEL);
1026 if (response) {
1027 err("%s - Error %d submitting interrupt urb",
1028 __FUNCTION__, response);
1029 }
1030
1031 }
1032
1033 }
1034
1035 /* see if we've set up our endpoint info yet *
1036 * (can't set it up in mos7840_startup as the *
1037 * structures were not set up at that time.) */
1038
1039 dbg("port number is %d \n", port->number);
1040 dbg("serial number is %d \n", port->serial->minor);
1041 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress);
1042 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress);
1043 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress);
1044 dbg("port's number in the device is %d\n", mos7840_port->port_num);
1045 mos7840_port->read_urb = port->read_urb;
1046
1047 /* set up our bulk in urb */
1048
1049 usb_fill_bulk_urb(mos7840_port->read_urb,
1050 serial->dev,
1051 usb_rcvbulkpipe(serial->dev,
1052 port->bulk_in_endpointAddress),
1053 port->bulk_in_buffer,
1054 mos7840_port->read_urb->transfer_buffer_length,
1055 mos7840_bulk_in_callback, mos7840_port);
1056
1057 dbg("mos7840_open: bulkin endpoint is %d\n",
1058 port->bulk_in_endpointAddress);
1059 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1060 if (response) {
1061 err("%s - Error %d submitting control urb", __FUNCTION__,
1062 response);
1063 }
1064
1065 /* initialize our wait queues */
1066 init_waitqueue_head(&mos7840_port->wait_chase);
1067 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1068
1069 /* initialize our icount structure */
1070 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1071
1072 /* initialize our port settings */
1073 mos7840_port->shadowMCR = MCR_MASTER_IE; /* Must set to enable ints! */
1074 /* send a open port command */
1075 mos7840_port->open = 1;
1076 //mos7840_change_port_settings(mos7840_port,old_termios);
1077 mos7840_port->icount.tx = 0;
1078 mos7840_port->icount.rx = 0;
1079
97c4965d 1080 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n", serial, mos7840_port, port);
3f542974
PS		 1081
1082 return 0;
1083
1084}
1085
1086/*****************************************************************************
1087 * mos7840_chars_in_buffer
1088 * this function is called by the tty driver when it wants to know how many
1089 * bytes of data we currently have outstanding in the port (data that has
1090 * been written, but hasn't made it out the port yet)
1091 * If successful, we return the number of bytes left to be written in the
1092 * system,
1093 * Otherwise we return a negative error number.
1094 *****************************************************************************/
1095
1096static int mos7840_chars_in_buffer(struct usb_serial_port *port)
1097{
1098 int i;
1099 int chars = 0;
1100 struct moschip_port *mos7840_port;
1101
1102 dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
1103
1104 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1105 dbg("%s", "Invalid port \n");
1106 return -1;
1107 }
1108
1109 mos7840_port = mos7840_get_port_private(port);
1110 if (mos7840_port == NULL) {
1111 dbg("%s \n", "mos7840_break:leaving ...........");
1112 return -1;
1113 }
1114
1115 for (i = 0; i < NUM_URBS; ++i) {
1116 if (mos7840_port->write_urb_pool[i]->status == -EINPROGRESS) {
1117 chars += URB_TRANSFER_BUFFER_SIZE;
1118 }
1119 }
1120 dbg("%s - returns %d", __FUNCTION__, chars);
1121 return (chars);
1122
1123}
1124
1125/************************************************************************
1126 *
1127 * mos7840_block_until_tx_empty
1128 *
1129 * This function will block the close until one of the following:
1130 * 1. TX count are 0
1131 * 2. The mos7840 has stopped
1132 * 3. A timout of 3 seconds without activity has expired
1133 *
1134 ************************************************************************/
1135static void mos7840_block_until_tx_empty(struct moschip_port *mos7840_port)
1136{
1137 int timeout = HZ / 10;
1138 int wait = 30;
1139 int count;
1140
1141 while (1) {
1142
1143 count = mos7840_chars_in_buffer(mos7840_port->port);
1144
1145 /* Check for Buffer status */
1146 if (count <= 0) {
1147 return;
1148 }
1149
1150 /* Block the thread for a while */
1151 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1152 timeout);
1153
1154 /* No activity.. count down section */
1155 wait--;
1156 if (wait == 0) {
1157 dbg("%s - TIMEOUT", __FUNCTION__);
1158 return;
1159 } else {
1160 /* Reset timout value back to seconds */
1161 wait = 30;
1162 }
1163 }
1164}
1165
1166/*****************************************************************************
1167 * mos7840_close
1168 * this function is called by the tty driver when a port is closed
1169 *****************************************************************************/
1170
1171static void mos7840_close(struct usb_serial_port *port, struct file *filp)
1172{
1173 struct usb_serial *serial;
1174 struct moschip_port *mos7840_port;
1175 int j;
1176 __u16 Data;
1177
1178 dbg("%s\n", "mos7840_close:entering...");
1179
1180 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1181 dbg("%s", "Port Paranoia failed \n");
1182 return;
1183 }
1184
1185 serial = mos7840_get_usb_serial(port, __FUNCTION__);
1186 if (!serial) {
1187 dbg("%s", "Serial Paranoia failed \n");
1188 return;
1189 }
1190
1191 mos7840_port = mos7840_get_port_private(port);
1192
1193 if (mos7840_port == NULL) {
1194 return;
1195 }
1196
1197 for (j = 0; j < NUM_URBS; ++j)
1198 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1199
1200 /* Freeing Write URBs */
1201 for (j = 0; j < NUM_URBS; ++j) {
1202 if (mos7840_port->write_urb_pool[j]) {
1203 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1204 kfree(mos7840_port->write_urb_pool[j]->
1205 transfer_buffer);
1206
1207 usb_free_urb(mos7840_port->write_urb_pool[j]);
1208 }
1209 }
1210
1211 if (serial->dev) {
1212 /* flush and block until tx is empty */
1213 mos7840_block_until_tx_empty(mos7840_port);
1214 }
1215
1216 /* While closing port, shutdown all bulk read, write *
1217 * and interrupt read if they exists */
1218 if (serial->dev) {
1219
1220 if (mos7840_port->write_urb) {
1221 dbg("%s", "Shutdown bulk write\n");
1222 usb_kill_urb(mos7840_port->write_urb);
1223 }
1224
1225 if (mos7840_port->read_urb) {
1226 dbg("%s", "Shutdown bulk read\n");
1227 usb_kill_urb(mos7840_port->read_urb);
1228 }
1229 if ((&mos7840_port->control_urb)) {
1230 dbg("%s", "Shutdown control read\n");
1231 // usb_kill_urb (mos7840_port->control_urb);
1232
1233 }
1234 }
1235// if(mos7840_port->ctrl_buf != NULL)
1236// kfree(mos7840_port->ctrl_buf);
1237 mos7840_num_open_ports--;
1238 dbg("mos7840_num_open_ports in close%d:in port%d\n",
1239 mos7840_num_open_ports, port->number);
1240 if (mos7840_num_open_ports == 0) {
1241 if (serial->port[0]->interrupt_in_urb) {
1242 dbg("%s", "Shutdown interrupt_in_urb\n");
1243 }
1244 }
1245
1246 if (mos7840_port->write_urb) {
1247 /* if this urb had a transfer buffer already (old tx) free it */
1248
1249 if (mos7840_port->write_urb->transfer_buffer != NULL) {
1250 kfree(mos7840_port->write_urb->transfer_buffer);
1251 }
1252 usb_free_urb(mos7840_port->write_urb);
1253 }
1254
1255 Data = 0x0;
1256 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1257
1258 Data = 0x00;
1259 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1260
1261 mos7840_port->open = 0;
1262
1263 dbg("%s \n", "Leaving ............");
1264}
1265
1266/************************************************************************
1267 *
1268 * mos7840_block_until_chase_response
1269 *
1270 * This function will block the close until one of the following:
1271 * 1. Response to our Chase comes from mos7840
1272 * 2. A timout of 10 seconds without activity has expired
1273 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1274 *
1275 ************************************************************************/
1276
1277static void mos7840_block_until_chase_response(struct moschip_port
1278 *mos7840_port)
1279{
1280 int timeout = 1 * HZ;
1281 int wait = 10;
1282 int count;
1283
1284 while (1) {
1285 count = mos7840_chars_in_buffer(mos7840_port->port);
1286
1287 /* Check for Buffer status */
1288 if (count <= 0) {
1289 return;
1290 }
1291
1292 /* Block the thread for a while */
1293 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1294 timeout);
1295 /* No activity.. count down section */
1296 wait--;
1297 if (wait == 0) {
1298 dbg("%s - TIMEOUT", __FUNCTION__);
1299 return;
1300 } else {
1301 /* Reset timout value back to seconds */
1302 wait = 10;
1303 }
1304 }
1305
1306}
1307
1308/*****************************************************************************
1309 * mos7840_break
1310 * this function sends a break to the port
1311 *****************************************************************************/
1312static void mos7840_break(struct usb_serial_port *port, int break_state)
1313{
1314 unsigned char data;
1315 struct usb_serial *serial;
1316 struct moschip_port *mos7840_port;
1317
1318 dbg("%s \n", "Entering ...........");
1319 dbg("mos7840_break: Start\n");
1320
1321 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1322 dbg("%s", "Port Paranoia failed \n");
1323 return;
1324 }
1325
1326 serial = mos7840_get_usb_serial(port, __FUNCTION__);
1327 if (!serial) {
1328 dbg("%s", "Serial Paranoia failed \n");
1329 return;
1330 }
1331
1332 mos7840_port = mos7840_get_port_private(port);
1333
1334 if (mos7840_port == NULL) {
1335 return;
1336 }
1337
1338 if (serial->dev) {
1339
1340 /* flush and block until tx is empty */
1341 mos7840_block_until_chase_response(mos7840_port);
1342 }
1343
1344 if (break_state == -1) {
1345 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1346 } else {
1347 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1348 }
1349
1350 mos7840_port->shadowLCR = data;
1351 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
1352 mos7840_port->shadowLCR);
1353 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1354 mos7840_port->shadowLCR);
1355
1356 return;
1357}
1358
1359/*****************************************************************************
1360 * mos7840_write_room
1361 * this function is called by the tty driver when it wants to know how many
1362 * bytes of data we can accept for a specific port.
1363 * If successful, we return the amount of room that we have for this port
1364 * Otherwise we return a negative error number.
1365 *****************************************************************************/
1366
1367static int mos7840_write_room(struct usb_serial_port *port)
1368{
1369 int i;
1370 int room = 0;
1371 struct moschip_port *mos7840_port;
1372
1373 dbg("%s \n", " mos7840_write_room:entering ...........");
1374
1375 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1376 dbg("%s", "Invalid port \n");
1377 dbg("%s \n", " mos7840_write_room:leaving ...........");
1378 return -1;
1379 }
1380
1381 mos7840_port = mos7840_get_port_private(port);
1382 if (mos7840_port == NULL) {
1383 dbg("%s \n", "mos7840_break:leaving ...........");
1384 return -1;
1385 }
1386
1387 for (i = 0; i < NUM_URBS; ++i) {
1388 if (mos7840_port->write_urb_pool[i]->status != -EINPROGRESS) {
1389 room += URB_TRANSFER_BUFFER_SIZE;
1390 }
1391 }
1392
1393 dbg("%s - returns %d", __FUNCTION__, room);
1394 return (room);
1395
1396}
1397
1398/*****************************************************************************
1399 * mos7840_write
1400 * this function is called by the tty driver when data should be written to
1401 * the port.
1402 * If successful, we return the number of bytes written, otherwise we
1403 * return a negative error number.
1404 *****************************************************************************/
1405
1406static int mos7840_write(struct usb_serial_port *port,
1407 const unsigned char *data, int count)
1408{
1409 int status;
1410 int i;
1411 int bytes_sent = 0;
1412 int transfer_size;
3f542974
PS		 1413
1414 struct moschip_port *mos7840_port;
1415 struct usb_serial *serial;
1416 struct urb *urb;
1417 //__u16 Data;
1418 const unsigned char *current_position = data;
1419 unsigned char *data1;
1420 dbg("%s \n", "entering ...........");
1421 //dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",mos7840_port->shadowLCR);
1422
1423#ifdef NOTMOS7840
1424 Data = 0x00;
1425 status = 0;
1426 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1427 mos7840_port->shadowLCR = Data;
1428 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
1429 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1430 mos7840_port->shadowLCR);
1431
1432 //Data = 0x03;
1433 //status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data);
1434 //mos7840_port->shadowLCR=Data;//Need to add later
1435
1436 Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80
1437 status = 0;
1438 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1439
1440 //Data = 0x0c;
1441 //status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data);
1442 Data = 0x00;
1443 status = 0;
1444 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1445 dbg("mos7840_write:DLL value is %x\n", Data);
1446
1447 Data = 0x0;
1448 status = 0;
1449 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1450 dbg("mos7840_write:DLM value is %x\n", Data);
1451
1452 Data = Data & ~SERIAL_LCR_DLAB;
1453 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1454 mos7840_port->shadowLCR);
1455 status = 0;
1456 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1457#endif
1458
1459 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1460 dbg("%s", "Port Paranoia failed \n");
1461 return -1;
1462 }
1463
1464 serial = port->serial;
1465 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
1466 dbg("%s", "Serial Paranoia failed \n");
1467 return -1;
1468 }
1469
1470 mos7840_port = mos7840_get_port_private(port);
1471 if (mos7840_port == NULL) {
1472 dbg("%s", "mos7840_port is NULL\n");
1473 return -1;
1474 }
1475
1476 /* try to find a free urb in the list */
1477 urb = NULL;
1478
1479 for (i = 0; i < NUM_URBS; ++i) {
1480 if (mos7840_port->write_urb_pool[i]->status != -EINPROGRESS) {
1481 urb = mos7840_port->write_urb_pool[i];
1482 dbg("\nURB:%d", i);
1483 break;
1484 }
1485 }
1486
1487 if (urb == NULL) {
1488 dbg("%s - no more free urbs", __FUNCTION__);
1489 goto exit;
1490 }
1491
1492 if (urb->transfer_buffer == NULL) {
1493 urb->transfer_buffer =
1494 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1495
1496 if (urb->transfer_buffer == NULL) {
1497 err("%s no more kernel memory...", __FUNCTION__);
1498 goto exit;
1499 }
1500 }
1501 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1502
97c4965d 1503 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1504
1505 /* fill urb with data and submit */
1506 usb_fill_bulk_urb(urb,
1507 serial->dev,
1508 usb_sndbulkpipe(serial->dev,
1509 port->bulk_out_endpointAddress),
1510 urb->transfer_buffer,
1511 transfer_size,
1512 mos7840_bulk_out_data_callback, mos7840_port);
1513
1514 data1 = urb->transfer_buffer;
1515 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress);
1516
1517 /* send it down the pipe */
1518 status = usb_submit_urb(urb, GFP_ATOMIC);
1519
1520 if (status) {
1521 err("%s - usb_submit_urb(write bulk) failed with status = %d",
1522 __FUNCTION__, status);
1523 bytes_sent = status;
1524 goto exit;
1525 }
1526 bytes_sent = transfer_size;
1527 mos7840_port->icount.tx += transfer_size;
1528 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
1529 exit:
1530
1531 return bytes_sent;
1532
1533}
1534
1535/*****************************************************************************
1536 * mos7840_throttle
1537 * this function is called by the tty driver when it wants to stop the data
1538 * being read from the port.
1539 *****************************************************************************/
1540
1541static void mos7840_throttle(struct usb_serial_port *port)
1542{
1543 struct moschip_port *mos7840_port;
1544 struct tty_struct *tty;
1545 int status;
1546
1547 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1548 dbg("%s", "Invalid port \n");
1549 return;
1550 }
1551
1552 dbg("- port %d\n", port->number);
1553
1554 mos7840_port = mos7840_get_port_private(port);
1555
1556 if (mos7840_port == NULL)
1557 return;
1558
1559 if (!mos7840_port->open) {
1560 dbg("%s\n", "port not opened");
1561 return;
1562 }
1563
1564 dbg("%s", "Entering .......... \n");
1565
1566 tty = port->tty;
1567 if (!tty) {
1568 dbg("%s - no tty available", __FUNCTION__);
1569 return;
1570 }
1571
1572 /* if we are implementing XON/XOFF, send the stop character */
1573 if (I_IXOFF(tty)) {
1574 unsigned char stop_char = STOP_CHAR(tty);
1575 status = mos7840_write(port, &stop_char, 1);
1576 if (status <= 0) {
1577 return;
1578 }
1579 }
1580
1581 /* if we are implementing RTS/CTS, toggle that line */
1582 if (tty->termios->c_cflag & CRTSCTS) {
1583 mos7840_port->shadowMCR &= ~MCR_RTS;
1584 status = 0;
1585 status =
1586 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1587 mos7840_port->shadowMCR);
1588
1589 if (status < 0) {
1590 return;
1591 }
1592 }
1593
1594 return;
1595}
1596
1597/*****************************************************************************
1598 * mos7840_unthrottle
1599 * this function is called by the tty driver when it wants to resume the data
1600 * being read from the port (called after SerialThrottle is called)
1601 *****************************************************************************/
1602static void mos7840_unthrottle(struct usb_serial_port *port)
1603{
1604 struct tty_struct *tty;
1605 int status;
1606 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1607
1608 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1609 dbg("%s", "Invalid port \n");
1610 return;
1611 }
1612
1613 if (mos7840_port == NULL)
1614 return;
1615
1616 if (!mos7840_port->open) {
1617 dbg("%s - port not opened", __FUNCTION__);
1618 return;
1619 }
1620
1621 dbg("%s", "Entering .......... \n");
1622
1623 tty = port->tty;
1624 if (!tty) {
1625 dbg("%s - no tty available", __FUNCTION__);
1626 return;
1627 }
1628
1629 /* if we are implementing XON/XOFF, send the start character */
1630 if (I_IXOFF(tty)) {
1631 unsigned char start_char = START_CHAR(tty);
1632 status = mos7840_write(port, &start_char, 1);
1633 if (status <= 0) {
1634 return;
1635 }
1636 }
1637
1638 /* if we are implementing RTS/CTS, toggle that line */
1639 if (tty->termios->c_cflag & CRTSCTS) {
1640 mos7840_port->shadowMCR |= MCR_RTS;
1641 status = 0;
1642 status =
1643 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1644 mos7840_port->shadowMCR);
1645 if (status < 0) {
1646 return;
1647 }
1648 }
1649
1650 return;
1651}
1652
1653static int mos7840_tiocmget(struct usb_serial_port *port, struct file *file)
1654{
1655 struct moschip_port *mos7840_port;
1656 unsigned int result;
1657 __u16 msr;
1658 __u16 mcr;
1659 int status = 0;
1660 mos7840_port = mos7840_get_port_private(port);
1661
1662 dbg("%s - port %d", __FUNCTION__, port->number);
1663
1664 if (mos7840_port == NULL)
1665 return -ENODEV;
1666
1667 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1668 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1669 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1670 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1671 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1672 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1673 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1674 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1675 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1676
1677 dbg("%s - 0x%04X", __FUNCTION__, result);
1678
1679 return result;
1680}
1681
1682static int mos7840_tiocmset(struct usb_serial_port *port, struct file *file,
1683 unsigned int set, unsigned int clear)
1684{
1685 struct moschip_port *mos7840_port;
1686 unsigned int mcr;
1687 unsigned int status;
1688
1689 dbg("%s - port %d", __FUNCTION__, port->number);
1690
1691 mos7840_port = mos7840_get_port_private(port);
1692
1693 if (mos7840_port == NULL)
1694 return -ENODEV;
1695
1696 mcr = mos7840_port->shadowMCR;
1697 if (clear & TIOCM_RTS)
1698 mcr &= ~MCR_RTS;
1699 if (clear & TIOCM_DTR)
1700 mcr &= ~MCR_DTR;
1701 if (clear & TIOCM_LOOP)
1702 mcr &= ~MCR_LOOPBACK;
1703
1704 if (set & TIOCM_RTS)
1705 mcr |= MCR_RTS;
1706 if (set & TIOCM_DTR)
1707 mcr |= MCR_DTR;
1708 if (set & TIOCM_LOOP)
1709 mcr |= MCR_LOOPBACK;
1710
1711 mos7840_port->shadowMCR = mcr;
1712
1713 status = 0;
1714 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1715 if (status < 0) {
1716 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
1717 return -1;
1718 }
1719
1720 return 0;
1721}
1722
1723/*****************************************************************************
1724 * mos7840_calc_baud_rate_divisor
1725 * this function calculates the proper baud rate divisor for the specified
1726 * baud rate.
1727 *****************************************************************************/
1728static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1729 __u16 * clk_sel_val)
1730{
1731
1732 dbg("%s - %d", __FUNCTION__, baudRate);
1733
1734 if (baudRate <= 115200) {
1735 *divisor = 115200 / baudRate;
1736 *clk_sel_val = 0x0;
1737 }
1738 if ((baudRate > 115200) && (baudRate <= 230400)) {
1739 *divisor = 230400 / baudRate;
1740 *clk_sel_val = 0x10;
1741 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1742 *divisor = 403200 / baudRate;
1743 *clk_sel_val = 0x20;
1744 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1745 *divisor = 460800 / baudRate;
1746 *clk_sel_val = 0x30;
1747 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1748 *divisor = 806400 / baudRate;
1749 *clk_sel_val = 0x40;
1750 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1751 *divisor = 921600 / baudRate;
1752 *clk_sel_val = 0x50;
1753 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1754 *divisor = 1572864 / baudRate;
1755 *clk_sel_val = 0x60;
1756 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1757 *divisor = 3145728 / baudRate;
1758 *clk_sel_val = 0x70;
1759 }
1760 return 0;
1761
1762#ifdef NOTMCS7840
1763
1764 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1765 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1766 *divisor = mos7840_divisor_table[i].Divisor;
1767 return 0;
1768 }
1769 }
1770
1771 /* After trying for all the standard baud rates *
1772 * Try calculating the divisor for this baud rate */
1773
1774 if (baudrate > 75 && baudrate < 230400) {
1775 /* get the divisor */
1776 custom = (__u16) (230400L / baudrate);
1777
1778 /* Check for round off */
1779 round1 = (__u16) (2304000L / baudrate);
1780 round = (__u16) (round1 - (custom * 10));
1781 if (round > 4) {
1782 custom++;
1783 }
1784 *divisor = custom;
1785
1786 dbg(" Baud %d = %d\n", baudrate, custom);
1787 return 0;
1788 }
1789
1790 dbg("%s\n", " Baud calculation Failed...");
1791 return -1;
1792#endif
1793}
1794
1795/*****************************************************************************
1796 * mos7840_send_cmd_write_baud_rate
1797 * this function sends the proper command to change the baud rate of the
1798 * specified port.
1799 *****************************************************************************/
1800
1801static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1802 int baudRate)
1803{
1804 int divisor = 0;
1805 int status;
1806 __u16 Data;
1807 unsigned char number;
1808 __u16 clk_sel_val;
1809 struct usb_serial_port *port;
1810
1811 if (mos7840_port == NULL)
1812 return -1;
1813
1814 port = (struct usb_serial_port *)mos7840_port->port;
1815 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1816 dbg("%s", "Invalid port \n");
1817 return -1;
1818 }
1819
1820 if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) {
1821 dbg("%s", "Invalid Serial \n");
1822 return -1;
1823 }
1824
1825 dbg("%s", "Entering .......... \n");
1826
1827 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1828
1829 dbg("%s - port = %d, baud = %d", __FUNCTION__,
1830 mos7840_port->port->number, baudRate);
1831 //reset clk_uart_sel in spregOffset
1832 if (baudRate > 115200) {
1833#ifdef HW_flow_control
1834 //NOTE: need to see the pther register to modify
1835 //setting h/w flow control bit to 1;
1836 status = 0;
1837 Data = 0x2b;
1838 mos7840_port->shadowMCR = Data;
1839 status =
1840 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1841 if (status < 0) {
1842 dbg("Writing spreg failed in set_serial_baud\n");
1843 return -1;
1844 }
1845#endif
1846
1847 } else {
1848#ifdef HW_flow_control
1849 //setting h/w flow control bit to 0;
1850 status = 0;
1851 Data = 0xb;
1852 mos7840_port->shadowMCR = Data;
1853 status =
1854 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1855 if (status < 0) {
1856 dbg("Writing spreg failed in set_serial_baud\n");
1857 return -1;
1858 }
1859#endif
1860
1861 }
1862
1863 if (1) //baudRate <= 115200)
1864 {
1865 clk_sel_val = 0x0;
1866 Data = 0x0;
1867 status = 0;
1868 status =
1869 mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1870 &clk_sel_val);
1871 status =
1872 mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1873 &Data);
1874 if (status < 0) {
1875 dbg("reading spreg failed in set_serial_baud\n");
1876 return -1;
1877 }
1878 Data = (Data & 0x8f) | clk_sel_val;
1879 status = 0;
1880 status =
1881 mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1882 if (status < 0) {
1883 dbg("Writing spreg failed in set_serial_baud\n");
1884 return -1;
1885 }
1886 /* Calculate the Divisor */
1887
1888 if (status) {
1889 err("%s - bad baud rate", __FUNCTION__);
1890 dbg("%s\n", "bad baud rate");
1891 return status;
1892 }
1893 /* Enable access to divisor latch */
1894 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1895 mos7840_port->shadowLCR = Data;
1896 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1897
1898 /* Write the divisor */
1899 Data = (unsigned char)(divisor & 0xff);
1900 dbg("set_serial_baud Value to write DLL is %x\n", Data);
1901 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1902
1903 Data = (unsigned char)((divisor & 0xff00) >> 8);
1904 dbg("set_serial_baud Value to write DLM is %x\n", Data);
1905 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1906
1907 /* Disable access to divisor latch */
1908 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1909 mos7840_port->shadowLCR = Data;
1910 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1911
1912 }
1913
1914 return status;
1915}
1916
1917/*****************************************************************************
1918 * mos7840_change_port_settings
1919 * This routine is called to set the UART on the device to match
1920 * the specified new settings.
1921 *****************************************************************************/
1922
1923static void mos7840_change_port_settings(struct moschip_port *mos7840_port,
606d099c 1924 struct ktermios *old_termios)
3f542974
PS		 1925{
1926 struct tty_struct *tty;
1927 int baud;
1928 unsigned cflag;
1929 unsigned iflag;
1930 __u8 lData;
1931 __u8 lParity;
1932 __u8 lStop;
1933 int status;
1934 __u16 Data;
1935 struct usb_serial_port *port;
1936 struct usb_serial *serial;
1937
1938 if (mos7840_port == NULL)
1939 return;
1940
1941 port = (struct usb_serial_port *)mos7840_port->port;
1942
1943 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1944 dbg("%s", "Invalid port \n");
1945 return;
1946 }
1947
1948 if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) {
1949 dbg("%s", "Invalid Serial \n");
1950 return;
1951 }
1952
1953 serial = port->serial;
1954
1955 dbg("%s - port %d", __FUNCTION__, mos7840_port->port->number);
1956
1957 if (!mos7840_port->open) {
1958 dbg("%s - port not opened", __FUNCTION__);
1959 return;
1960 }
1961
1962 tty = mos7840_port->port->tty;
1963
1964 if ((!tty) || (!tty->termios)) {
1965 dbg("%s - no tty structures", __FUNCTION__);
1966 return;
1967 }
1968
1969 dbg("%s", "Entering .......... \n");
1970
1971 lData = LCR_BITS_8;
1972 lStop = LCR_STOP_1;
1973 lParity = LCR_PAR_NONE;
1974
1975 cflag = tty->termios->c_cflag;
1976 iflag = tty->termios->c_iflag;
1977
1978 /* Change the number of bits */
1979 if (cflag & CSIZE) {
1980 switch (cflag & CSIZE) {
1981 case CS5:
1982 lData = LCR_BITS_5;
1983 break;
1984
1985 case CS6:
1986 lData = LCR_BITS_6;
1987 break;
1988
1989 case CS7:
1990 lData = LCR_BITS_7;
1991 break;
1992 default:
1993 case CS8:
1994 lData = LCR_BITS_8;
1995 break;
1996 }
1997 }
1998 /* Change the Parity bit */
1999 if (cflag & PARENB) {
2000 if (cflag & PARODD) {
2001 lParity = LCR_PAR_ODD;
2002 dbg("%s - parity = odd", __FUNCTION__);
2003 } else {
2004 lParity = LCR_PAR_EVEN;
2005 dbg("%s - parity = even", __FUNCTION__);
2006 }
2007
2008 } else {
2009 dbg("%s - parity = none", __FUNCTION__);
2010 }
2011
2012 if (cflag & CMSPAR) {
2013 lParity = lParity | 0x20;
2014 }
2015
2016 /* Change the Stop bit */
2017 if (cflag & CSTOPB) {
2018 lStop = LCR_STOP_2;
2019 dbg("%s - stop bits = 2", __FUNCTION__);
2020 } else {
2021 lStop = LCR_STOP_1;
2022 dbg("%s - stop bits = 1", __FUNCTION__);
2023 }
2024
2025 /* Update the LCR with the correct value */
2026 mos7840_port->shadowLCR &=
2027 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2028 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2029
2030 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
2031 mos7840_port->shadowLCR);
2032 /* Disable Interrupts */
2033 Data = 0x00;
2034 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2035
2036 Data = 0x00;
2037 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2038
2039 Data = 0xcf;
2040 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2041
2042 /* Send the updated LCR value to the mos7840 */
2043 Data = mos7840_port->shadowLCR;
2044
2045 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2046
2047 Data = 0x00b;
2048 mos7840_port->shadowMCR = Data;
2049 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2050 Data = 0x00b;
2051 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2052
2053 /* set up the MCR register and send it to the mos7840 */
2054
2055 mos7840_port->shadowMCR = MCR_MASTER_IE;
2056 if (cflag & CBAUD) {
2057 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2058 }
2059
2060 if (cflag & CRTSCTS) {
2061 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2062
2063 } else {
2064 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2065 }
2066
2067 Data = mos7840_port->shadowMCR;
2068 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2069
2070 /* Determine divisor based on baud rate */
2071 baud = tty_get_baud_rate(tty);
2072
2073 if (!baud) {
2074 /* pick a default, any default... */
2075 dbg("%s\n", "Picked default baud...");
2076 baud = 9600;
2077 }
2078
2079 dbg("%s - baud rate = %d", __FUNCTION__, baud);
2080 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2081
2082 /* Enable Interrupts */
2083 Data = 0x0c;
2084 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2085
2086 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2087 mos7840_port->read_urb->dev = serial->dev;
2088
2089 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2090
2091 if (status) {
2092 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2093 status);
2094 }
2095 }
2096 wake_up(&mos7840_port->delta_msr_wait);
2097 mos7840_port->delta_msr_cond = 1;
2098 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
2099 mos7840_port->shadowLCR);
2100
2101 return;
2102}
2103
2104/*****************************************************************************
2105 * mos7840_set_termios
2106 * this function is called by the tty driver when it wants to change
2107 * the termios structure
2108 *****************************************************************************/
2109
2110static void mos7840_set_termios(struct usb_serial_port *port,
606d099c 2111 struct ktermios *old_termios)
3f542974
PS		 2112{
2113 int status;
2114 unsigned int cflag;
2115 struct usb_serial *serial;
2116 struct moschip_port *mos7840_port;
2117 struct tty_struct *tty;
2118 dbg("mos7840_set_termios: START\n");
2119 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
2120 dbg("%s", "Invalid port \n");
2121 return;
2122 }
2123
2124 serial = port->serial;
2125
2126 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
2127 dbg("%s", "Invalid Serial \n");
2128 return;
2129 }
2130
2131 mos7840_port = mos7840_get_port_private(port);
2132
2133 if (mos7840_port == NULL)
2134 return;
2135
2136 tty = port->tty;
2137
2138 if (!port->tty || !port->tty->termios) {
2139 dbg("%s - no tty or termios", __FUNCTION__);
2140 return;
2141 }
2142
2143 if (!mos7840_port->open) {
2144 dbg("%s - port not opened", __FUNCTION__);
2145 return;
2146 }
2147
2148 dbg("%s\n", "setting termios - ");
2149
2150 cflag = tty->termios->c_cflag;
2151
2152 if (!cflag) {
2153 dbg("%s %s\n", __FUNCTION__, "cflag is NULL");
2154 return;
2155 }
2156
2157 /* check that they really want us to change something */
2158 if (old_termios) {
2159 if ((cflag == old_termios->c_cflag) &&
2160 (RELEVANT_IFLAG(tty->termios->c_iflag) ==
2161 RELEVANT_IFLAG(old_termios->c_iflag))) {
2162 dbg("%s\n", "Nothing to change");
2163 return;
2164 }
2165 }
2166
2167 dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
2168 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2169
2170 if (old_termios) {
2171 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
2172 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2173 }
2174
2175 dbg("%s - port %d", __FUNCTION__, port->number);
2176
2177 /* change the port settings to the new ones specified */
2178
2179 mos7840_change_port_settings(mos7840_port, old_termios);
2180
2181 if (!mos7840_port->read_urb) {
2182 dbg("%s", "URB KILLED !!!!!\n");
2183 return;
2184 }
2185
2186 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2187 mos7840_port->read_urb->dev = serial->dev;
2188 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2189 if (status) {
2190 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2191 status);
2192 }
2193 }
2194 return;
2195}
2196
2197/*****************************************************************************
2198 * mos7840_get_lsr_info - get line status register info
2199 *
2200 * Purpose: Let user call ioctl() to get info when the UART physically
2201 * is emptied. On bus types like RS485, the transmitter must
2202 * release the bus after transmitting. This must be done when
2203 * the transmit shift register is empty, not be done when the
2204 * transmit holding register is empty. This functionality
2205 * allows an RS485 driver to be written in user space.
2206 *****************************************************************************/
2207
2208static int mos7840_get_lsr_info(struct moschip_port *mos7840_port,
97c4965d 2209 unsigned int __user *value)
3f542974
PS		 2210{
2211 int count;
2212 unsigned int result = 0;
2213
2214 count = mos7840_chars_in_buffer(mos7840_port->port);
2215 if (count == 0) {
2216 dbg("%s -- Empty", __FUNCTION__);
2217 result = TIOCSER_TEMT;
2218 }
2219
2220 if (copy_to_user(value, &result, sizeof(int)))
2221 return -EFAULT;
2222 return 0;
2223}
2224
2225/*****************************************************************************
2226 * mos7840_get_bytes_avail - get number of bytes available
2227 *
2228 * Purpose: Let user call ioctl to get the count of number of bytes available.
2229 *****************************************************************************/
2230
2231static int mos7840_get_bytes_avail(struct moschip_port *mos7840_port,
97c4965d 2232 unsigned int __user *value)
3f542974
PS		 2233{
2234 unsigned int result = 0;
2235 struct tty_struct *tty = mos7840_port->port->tty;
2236
2237 if (!tty)
2238 return -ENOIOCTLCMD;
2239
2240 result = tty->read_cnt;
2241
2242 dbg("%s(%d) = %d", __FUNCTION__, mos7840_port->port->number, result);
2243 if (copy_to_user(value, &result, sizeof(int)))
2244 return -EFAULT;
2245
2246 return -ENOIOCTLCMD;
2247}
2248
2249/*****************************************************************************
2250 * mos7840_set_modem_info
2251 * function to set modem info
2252 *****************************************************************************/
2253
2254static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
97c4965d 2255 unsigned int cmd, unsigned int __user *value)
3f542974
PS		 2256{
2257 unsigned int mcr;
2258 unsigned int arg;
2259 __u16 Data;
2260 int status;
2261 struct usb_serial_port *port;
2262
2263 if (mos7840_port == NULL)
2264 return -1;
2265
2266 port = (struct usb_serial_port *)mos7840_port->port;
2267 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
2268 dbg("%s", "Invalid port \n");
2269 return -1;
2270 }
2271
2272 mcr = mos7840_port->shadowMCR;
2273
2274 if (copy_from_user(&arg, value, sizeof(int)))
2275 return -EFAULT;
2276
2277 switch (cmd) {
2278 case TIOCMBIS:
2279 if (arg & TIOCM_RTS)
2280 mcr |= MCR_RTS;
2281 if (arg & TIOCM_DTR)
2282 mcr |= MCR_RTS;
2283 if (arg & TIOCM_LOOP)
2284 mcr |= MCR_LOOPBACK;
2285 break;
2286
2287 case TIOCMBIC:
2288 if (arg & TIOCM_RTS)
2289 mcr &= ~MCR_RTS;
2290 if (arg & TIOCM_DTR)
2291 mcr &= ~MCR_RTS;
2292 if (arg & TIOCM_LOOP)
2293 mcr &= ~MCR_LOOPBACK;
2294 break;
2295
2296 case TIOCMSET:
2297 /* turn off the RTS and DTR and LOOPBACK
2298 * and then only turn on what was asked to */
2299 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK);
2300 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0);
2301 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0);
2302 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0);
2303 break;
2304 }
2305
2306 mos7840_port->shadowMCR = mcr;
2307
2308 Data = mos7840_port->shadowMCR;
2309 status = 0;
2310 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2311 if (status < 0) {
2312 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
2313 return -1;
2314 }
2315
2316 return 0;
2317}
2318
2319/*****************************************************************************
2320 * mos7840_get_modem_info
2321 * function to get modem info
2322 *****************************************************************************/
2323
2324static int mos7840_get_modem_info(struct moschip_port *mos7840_port,
97c4965d 2325 unsigned int __user *value)
3f542974
PS		 2326{
2327 unsigned int result = 0;
2328 __u16 msr;
2329 unsigned int mcr = mos7840_port->shadowMCR;
2330 int status = 0;
2331 status =
2332 mos7840_get_uart_reg(mos7840_port->port, MODEM_STATUS_REGISTER,
2333 &msr);
2334 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
2335 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
2336 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
2337 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */
2338 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
2339 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
2340
2341 dbg("%s -- %x", __FUNCTION__, result);
2342
2343 if (copy_to_user(value, &result, sizeof(int)))
2344 return -EFAULT;
2345 return 0;
2346}
2347
2348/*****************************************************************************
2349 * mos7840_get_serial_info
2350 * function to get information about serial port
2351 *****************************************************************************/
2352
2353static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2354 struct serial_struct __user *retinfo)
3f542974
PS		 2355{
2356 struct serial_struct tmp;
2357
2358 if (mos7840_port == NULL)
2359 return -1;
2360
2361 if (!retinfo)
2362 return -EFAULT;
2363
2364 memset(&tmp, 0, sizeof(tmp));
2365
2366 tmp.type = PORT_16550A;
2367 tmp.line = mos7840_port->port->serial->minor;
2368 tmp.port = mos7840_port->port->number;
2369 tmp.irq = 0;
2370 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2371 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2372 tmp.baud_base = 9600;
2373 tmp.close_delay = 5 * HZ;
2374 tmp.closing_wait = 30 * HZ;
2375
2376 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2377 return -EFAULT;
2378 return 0;
2379}
2380
2381/*****************************************************************************
2382 * SerialIoctl
2383 * this function handles any ioctl calls to the driver
2384 *****************************************************************************/
2385
2386static int mos7840_ioctl(struct usb_serial_port *port, struct file *file,
2387 unsigned int cmd, unsigned long arg)
2388{
97c4965d 2389 void __user *argp = (void __user *)arg;
3f542974
PS		 2390 struct moschip_port *mos7840_port;
2391 struct tty_struct *tty;
2392
2393 struct async_icount cnow;
2394 struct async_icount cprev;
2395 struct serial_icounter_struct icount;
2396 int mosret = 0;
2397 int retval;
2398 struct tty_ldisc *ld;
2399
2400 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
2401 dbg("%s", "Invalid port \n");
2402 return -1;
2403 }
2404
2405 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2406
2407 if (mos7840_port == NULL)
2408 return -1;
2409
ad18027f
AB		 2410 tty = mos7840_port->port->tty;
2411
3f542974
PS		 2412 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
2413
2414 switch (cmd) {
2415 /* return number of bytes available */
2416
2417 case TIOCINQ:
2418 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
97c4965d 2419 return mos7840_get_bytes_avail(mos7840_port, argp);
3f542974
PS		 2420
2421 case TIOCOUTQ:
2422 dbg("%s (%d) TIOCOUTQ", __FUNCTION__, port->number);
2423 return put_user(tty->driver->chars_in_buffer ?
2424 tty->driver->chars_in_buffer(tty) : 0,
2425 (int __user *)arg);
3f542974
PS		 2426
2427 case TCFLSH:
2428 retval = tty_check_change(tty);
2429 if (retval)
2430 return retval;
2431
2432 ld = tty_ldisc_ref(tty);
2433 switch (arg) {
2434 case TCIFLUSH:
2435 if (ld && ld->flush_buffer)
2436 ld->flush_buffer(tty);
2437 break;
2438 case TCIOFLUSH:
2439 if (ld && ld->flush_buffer)
2440 ld->flush_buffer(tty);
2441 /* fall through */
2442 case TCOFLUSH:
2443 if (tty->driver->flush_buffer)
2444 tty->driver->flush_buffer(tty);
2445 break;
2446 default:
2447 tty_ldisc_deref(ld);
2448 return -EINVAL;
2449 }
2450 tty_ldisc_deref(ld);
2451 return 0;
2452
3f542974
PS		 2453 case TIOCSERGETLSR:
2454 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
97c4965d 2455 return mos7840_get_lsr_info(mos7840_port, argp);
3f542974
PS		 2456 return 0;
2457
2458 case TIOCMBIS:
2459 case TIOCMBIC:
2460 case TIOCMSET:
2461 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,
2462 port->number);
2463 mosret =
97c4965d 2464 mos7840_set_modem_info(mos7840_port, cmd, argp);
3f542974
PS		 2465 return mosret;
2466
2467 case TIOCMGET:
2468 dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number);
97c4965d 2469 return mos7840_get_modem_info(mos7840_port, argp);
3f542974
PS		 2470
2471 case TIOCGSERIAL:
2472 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
97c4965d 2473 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2474
2475 case TIOCSSERIAL:
2476 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
2477 break;
2478
2479 case TIOCMIWAIT:
2480 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
2481 cprev = mos7840_port->icount;
2482 while (1) {
2483 //interruptible_sleep_on(&mos7840_port->delta_msr_wait);
2484 mos7840_port->delta_msr_cond = 0;
2485 wait_event_interruptible(mos7840_port->delta_msr_wait,
2486 (mos7840_port->
2487 delta_msr_cond == 1));
2488
2489 /* see if a signal did it */
2490 if (signal_pending(current))
2491 return -ERESTARTSYS;
2492 cnow = mos7840_port->icount;
2493 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2494 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2495 return -EIO; /* no change => error */
2496 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2497 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2498 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2499 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2500 return 0;
2501 }
2502 cprev = cnow;
2503 }
2504 /* NOTREACHED */
2505 break;
2506
2507 case TIOCGICOUNT:
2508 cnow = mos7840_port->icount;
2509 icount.cts = cnow.cts;
2510 icount.dsr = cnow.dsr;
2511 icount.rng = cnow.rng;
2512 icount.dcd = cnow.dcd;
2513 icount.rx = cnow.rx;
2514 icount.tx = cnow.tx;
2515 icount.frame = cnow.frame;
2516 icount.overrun = cnow.overrun;
2517 icount.parity = cnow.parity;
2518 icount.brk = cnow.brk;
2519 icount.buf_overrun = cnow.buf_overrun;
2520
2521 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,
2522 port->number, icount.rx, icount.tx);
97c4965d 2523 if (copy_to_user(argp, &icount, sizeof(icount)))
3f542974
PS		 2524 return -EFAULT;
2525 return 0;
2526
2527 case TIOCEXBAUD:
2528 return 0;
2529 default:
2530 break;
2531 }
2532
2533 return -ENOIOCTLCMD;
2534}
2535
2536static int mos7840_calc_num_ports(struct usb_serial *serial)
2537{
2538
2539 dbg("numberofendpoints: %d \n",
2540 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
2541 dbg("numberofendpoints: %d \n",
2542 (int)serial->interface->altsetting->desc.bNumEndpoints);
2543 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
2544 mos7840_num_ports = 2;
2545 serial->type->num_ports = 2;
2546 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
2547 mos7840_num_ports = 4;
2548 serial->type->num_bulk_in = 4;
2549 serial->type->num_bulk_out = 4;
2550 serial->type->num_ports = 4;
2551 }
2552
2553 return mos7840_num_ports;
2554}
2555
2556/****************************************************************************
2557 * mos7840_startup
2558 ****************************************************************************/
2559
2560static int mos7840_startup(struct usb_serial *serial)
2561{
2562 struct moschip_port *mos7840_port;
2563 struct usb_device *dev;
2564 int i, status;
2565
2566 __u16 Data;
2567 dbg("%s \n", " mos7840_startup :entering..........");
2568
2569 if (!serial) {
2570 dbg("%s\n", "Invalid Handler");
2571 return -1;
2572 }
2573
2574 dev = serial->dev;
2575
2576 dbg("%s\n", "Entering...");
2577
2578 /* we set up the pointers to the endpoints in the mos7840_open *
2579 * function, as the structures aren't created yet. */
2580
2581 /* set up port private structures */
2582 for (i = 0; i < serial->num_ports; ++i) {
7ac9da10 2583 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
3f542974
PS		 2584 if (mos7840_port == NULL) {
2585 err("%s - Out of memory", __FUNCTION__);
2586 return -ENOMEM;
2587 }
3f542974
PS		 2588
2589 /* Initialize all port interrupt end point to port 0 int endpoint *
2590 * Our device has only one interrupt end point comman to all port */
2591
2592 mos7840_port->port = serial->port[i];
2593 mos7840_set_port_private(serial->port[i], mos7840_port);
2594
2595 mos7840_port->port_num = ((serial->port[i]->number -
2596 (serial->port[i]->serial->minor)) +
2597 1);
2598
2599 if (mos7840_port->port_num == 1) {
2600 mos7840_port->SpRegOffset = 0x0;
2601 mos7840_port->ControlRegOffset = 0x1;
2602 mos7840_port->DcrRegOffset = 0x4;
2603 } else if ((mos7840_port->port_num == 2)
2604 && (mos7840_num_ports == 4)) {
2605 mos7840_port->SpRegOffset = 0x8;
2606 mos7840_port->ControlRegOffset = 0x9;
2607 mos7840_port->DcrRegOffset = 0x16;
2608 } else if ((mos7840_port->port_num == 2)
2609 && (mos7840_num_ports == 2)) {
2610 mos7840_port->SpRegOffset = 0xa;
2611 mos7840_port->ControlRegOffset = 0xb;
2612 mos7840_port->DcrRegOffset = 0x19;
2613 } else if ((mos7840_port->port_num == 3)
2614 && (mos7840_num_ports == 4)) {
2615 mos7840_port->SpRegOffset = 0xa;
2616 mos7840_port->ControlRegOffset = 0xb;
2617 mos7840_port->DcrRegOffset = 0x19;
2618 } else if ((mos7840_port->port_num == 4)
2619 && (mos7840_num_ports == 4)) {
2620 mos7840_port->SpRegOffset = 0xc;
2621 mos7840_port->ControlRegOffset = 0xd;
2622 mos7840_port->DcrRegOffset = 0x1c;
2623 }
2624 mos7840_dump_serial_port(mos7840_port);
2625
2626 mos7840_set_port_private(serial->port[i], mos7840_port);
2627
2628 //enable rx_disable bit in control register
2629
2630 status =
2631 mos7840_get_reg_sync(serial->port[i],
2632 mos7840_port->ControlRegOffset, &Data);
2633 if (status < 0) {
2634 dbg("Reading ControlReg failed status-0x%x\n", status);
2635 break;
2636 } else
2637 dbg("ControlReg Reading success val is %x, status%d\n",
2638 Data, status);
2639 Data |= 0x08; //setting driver done bit
2640 Data |= 0x04; //sp1_bit to have cts change reflect in modem status reg
2641
2642 //Data |= 0x20; //rx_disable bit
2643 status = 0;
2644 status =
2645 mos7840_set_reg_sync(serial->port[i],
2646 mos7840_port->ControlRegOffset, Data);
2647 if (status < 0) {
2648 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2649 break;
2650 } else
2651 dbg("ControlReg Writing success(rx_disable) status%d\n",
2652 status);
2653
2654 //Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 and 0x24 in DCR3
2655 Data = 0x01;
2656 status = 0;
2657 status =
2658 mos7840_set_reg_sync(serial->port[i],
2659 (__u16) (mos7840_port->DcrRegOffset +
2660 0), Data);
2661 if (status < 0) {
2662 dbg("Writing DCR0 failed status-0x%x\n", status);
2663 break;
2664 } else
2665 dbg("DCR0 Writing success status%d\n", status);
2666
2667 Data = 0x05;
2668 status = 0;
2669 status =
2670 mos7840_set_reg_sync(serial->port[i],
2671 (__u16) (mos7840_port->DcrRegOffset +
2672 1), Data);
2673 if (status < 0) {
2674 dbg("Writing DCR1 failed status-0x%x\n", status);
2675 break;
2676 } else
2677 dbg("DCR1 Writing success status%d\n", status);
2678
2679 Data = 0x24;
2680 status = 0;
2681 status =
2682 mos7840_set_reg_sync(serial->port[i],
2683 (__u16) (mos7840_port->DcrRegOffset +
2684 2), Data);
2685 if (status < 0) {
2686 dbg("Writing DCR2 failed status-0x%x\n", status);
2687 break;
2688 } else
2689 dbg("DCR2 Writing success status%d\n", status);
2690
2691 // write values in clkstart0x0 and clkmulti 0x20
2692 Data = 0x0;
2693 status = 0;
2694 status =
2695 mos7840_set_reg_sync(serial->port[i],
2696 CLK_START_VALUE_REGISTER, Data);
2697 if (status < 0) {
2698 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2699 break;
2700 } else
2701 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2702
2703 Data = 0x20;
2704 status = 0;
2705 status =
2706 mos7840_set_reg_sync(serial->port[i], CLK_MULTI_REGISTER,
2707 Data);
2708 if (status < 0) {
2709 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
2710 status);
2711 break;
2712 } else
2713 dbg("CLK_MULTI_REGISTER Writing success status%d\n",
2714 status);
2715
2716 //write value 0x0 to scratchpad register
2717 Data = 0x00;
2718 status = 0;
2719 status =
2720 mos7840_set_uart_reg(serial->port[i], SCRATCH_PAD_REGISTER,
2721 Data);
2722 if (status < 0) {
2723 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
2724 status);
2725 break;
2726 } else
2727 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
2728 status);
2729
2730 //Zero Length flag register
2731 if ((mos7840_port->port_num != 1)
2732 && (mos7840_num_ports == 2)) {
2733
2734 Data = 0xff;
2735 status = 0;
2736 status = mos7840_set_reg_sync(serial->port[i],
2737 (__u16) (ZLP_REG1 +
2738 ((__u16)
2739 mos7840_port->
2740 port_num)),
2741 Data);
2742 dbg("ZLIP offset%x\n",
2743 (__u16) (ZLP_REG1 +
2744 ((__u16) mos7840_port->port_num)));
2745 if (status < 0) {
2746 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2747 i + 2, status);
2748 break;
2749 } else
2750 dbg("ZLP_REG%d Writing success status%d\n",
2751 i + 2, status);
2752 } else {
2753 Data = 0xff;
2754 status = 0;
2755 status = mos7840_set_reg_sync(serial->port[i],
2756 (__u16) (ZLP_REG1 +
2757 ((__u16)
2758 mos7840_port->
2759 port_num) -
2760 0x1), Data);
2761 dbg("ZLIP offset%x\n",
2762 (__u16) (ZLP_REG1 +
2763 ((__u16) mos7840_port->port_num) - 0x1));
2764 if (status < 0) {
2765 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2766 i + 1, status);
2767 break;
2768 } else
2769 dbg("ZLP_REG%d Writing success status%d\n",
2770 i + 1, status);
2771
2772 }
54e6ecb2 2773 mos7840_port->control_urb = usb_alloc_urb(0, GFP_ATOMIC);
3f542974
PS		 2774 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2775
2776 }
2777
2778 //Zero Length flag enable
2779 Data = 0x0f;
2780 status = 0;
2781 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2782 if (status < 0) {
2783 dbg("Writing ZLP_REG5 failed status-0x%x\n", status);
2784 return -1;
2785 } else
2786 dbg("ZLP_REG5 Writing success status%d\n", status);
2787
2788 /* setting configuration feature to one */
2789 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
97c4965d 2790 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
3f542974
PS		 2791 return 0;
2792}
2793
2794/****************************************************************************
2795 * mos7840_shutdown
2796 * This function is called whenever the device is removed from the usb bus.
2797 ****************************************************************************/
2798
2799static void mos7840_shutdown(struct usb_serial *serial)
2800{
2801 int i;
2802 struct moschip_port *mos7840_port;
2803 dbg("%s \n", " shutdown :entering..........");
2804
2805 if (!serial) {
2806 dbg("%s", "Invalid Handler \n");
2807 return;
2808 }
2809
2810 /* check for the ports to be closed,close the ports and disconnect */
2811
2812 /* free private structure allocated for serial port *
2813 * stop reads and writes on all ports */
2814
2815 for (i = 0; i < serial->num_ports; ++i) {
2816 mos7840_port = mos7840_get_port_private(serial->port[i]);
2817 kfree(mos7840_port->ctrl_buf);
2818 usb_kill_urb(mos7840_port->control_urb);
2819 kfree(mos7840_port);
2820 mos7840_set_port_private(serial->port[i], NULL);
2821 }
2822
2823 dbg("%s\n", "Thank u :: ");
2824
2825}
2826
d9b1b787
JH		 2827static struct usb_driver io_driver = {
2828 .name = "mos7840",
2829 .probe = usb_serial_probe,
2830 .disconnect = usb_serial_disconnect,
2831 .id_table = moschip_id_table_combined,
2832 .no_dynamic_id = 1,
2833};
2834
3f542974
PS		 2835static struct usb_serial_driver moschip7840_4port_device = {
2836 .driver = {
2837 .owner = THIS_MODULE,
2838 .name = "mos7840",
2839 },
2840 .description = DRIVER_DESC,
d9b1b787 2841 .usb_driver = &io_driver,
3f542974
PS		 2842 .id_table = moschip_port_id_table,
2843 .num_interrupt_in = 1, //NUM_DONT_CARE,//1,
2844#ifdef check
2845 .num_bulk_in = 4,
2846 .num_bulk_out = 4,
2847 .num_ports = 4,
2848#endif
2849 .open = mos7840_open,
2850 .close = mos7840_close,
2851 .write = mos7840_write,
2852 .write_room = mos7840_write_room,
2853 .chars_in_buffer = mos7840_chars_in_buffer,
2854 .throttle = mos7840_throttle,
2855 .unthrottle = mos7840_unthrottle,
2856 .calc_num_ports = mos7840_calc_num_ports,
2857#ifdef MCSSerialProbe
2858 .probe = mos7840_serial_probe,
2859#endif
2860 .ioctl = mos7840_ioctl,
2861 .set_termios = mos7840_set_termios,
2862 .break_ctl = mos7840_break,
2863 .tiocmget = mos7840_tiocmget,
2864 .tiocmset = mos7840_tiocmset,
2865 .attach = mos7840_startup,
2866 .shutdown = mos7840_shutdown,
2867 .read_bulk_callback = mos7840_bulk_in_callback,
2868 .read_int_callback = mos7840_interrupt_callback,
2869};
2870
3f542974
PS		 2871/****************************************************************************
2872 * moschip7840_init
2873 * This is called by the module subsystem, or on startup to initialize us
2874 ****************************************************************************/
2875static int __init moschip7840_init(void)
2876{
2877 int retval;
2878
2879 dbg("%s \n", " mos7840_init :entering..........");
2880
2881 /* Register with the usb serial */
2882 retval = usb_serial_register(&moschip7840_4port_device);
2883
2884 if (retval)
2885 goto failed_port_device_register;
2886
2887 dbg("%s\n", "Entring...");
2888 info(DRIVER_DESC " " DRIVER_VERSION);
2889
2890 /* Register with the usb */
2891 retval = usb_register(&io_driver);
2892
2893 if (retval)
2894 goto failed_usb_register;
2895
2896 if (retval == 0) {
2897 dbg("%s\n", "Leaving...");
2898 return 0;
2899 }
2900
2901 failed_usb_register:
2902 usb_serial_deregister(&moschip7840_4port_device);
2903
2904 failed_port_device_register:
2905
2906 return retval;
2907}
2908
2909/****************************************************************************
2910 * moschip7840_exit
2911 * Called when the driver is about to be unloaded.
2912 ****************************************************************************/
2913static void __exit moschip7840_exit(void)
2914{
2915
2916 dbg("%s \n", " mos7840_exit :entering..........");
2917
2918 usb_deregister(&io_driver);
2919
2920 usb_serial_deregister(&moschip7840_4port_device);
2921
2922 dbg("%s\n", "Entring...");
2923}
2924
2925module_init(moschip7840_init);
2926module_exit(moschip7840_exit);
2927
2928/* Module information */
2929MODULE_DESCRIPTION(DRIVER_DESC);
2930MODULE_LICENSE("GPL");
2931
2932module_param(debug, bool, S_IRUGO | S_IWUSR);
2933MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux kernel - Deliverables
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