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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
758 if (tty && mos7840_port->open) {
759 /* let the tty driver wakeup if it has a special *
760 * write_wakeup function */
761
762 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP))
763 && tty->ldisc.write_wakeup) {
764 (tty->ldisc.write_wakeup) (tty);
765 }
766
767 /* tell the tty driver that something has changed */
768 wake_up_interruptible(&tty->write_wait);
769 }
770
771}
772
773/************************************************************************/
774/* 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 */
775/************************************************************************/
776#ifdef MCSSerialProbe
777static int mos7840_serial_probe(struct usb_serial *serial,
778 const struct usb_device_id *id)
779{
780
781 /*need to implement the mode_reg reading and updating\
782 structures usb_serial_ device_type\
783 (i.e num_ports, num_bulkin,bulkout etc) */
784 /* Also we can update the changes attach */
785 return 1;
786}
787#endif
788
789/*****************************************************************************
790 * mos7840_open
791 * this function is called by the tty driver when a port is opened
792 * If successful, we return 0
793 * Otherwise we return a negative error number.
794 *****************************************************************************/
795
796static int mos7840_open(struct usb_serial_port *port, struct file *filp)
797{
798 int response;
799 int j;
800 struct usb_serial *serial;
801 struct urb *urb;
802 __u16 Data;
803 int status;
804 struct moschip_port *mos7840_port;
805
806 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
807 dbg("%s", "Port Paranoia failed \n");
808 return -ENODEV;
809 }
810
811 mos7840_num_open_ports++;
812 serial = port->serial;
813
814 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
815 dbg("%s", "Serial Paranoia failed \n");
816 return -ENODEV;
817 }
818
819 mos7840_port = mos7840_get_port_private(port);
820
821 if (mos7840_port == NULL)
822 return -ENODEV;
823
824 usb_clear_halt(serial->dev, port->write_urb->pipe);
825 usb_clear_halt(serial->dev, port->read_urb->pipe);
826
827 /* Initialising the write urb pool */
828 for (j = 0; j < NUM_URBS; ++j) {
54e6ecb2 829 urb = usb_alloc_urb(0, GFP_ATOMIC);
3f542974
PS		 830 mos7840_port->write_urb_pool[j] = urb;
831
832 if (urb == NULL) {
833 err("No more urbs???");
834 continue;
835 }
836
837 urb->transfer_buffer = NULL;
838 urb->transfer_buffer =
839 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
840 if (!urb->transfer_buffer) {
841 err("%s-out of memory for urb buffers.", __FUNCTION__);
842 continue;
843 }
844 }
845
846/*****************************************************************************
847 * Initialize MCS7840 -- Write Init values to corresponding Registers
848 *
849 * Register Index
850 * 1 : IER
851 * 2 : FCR
852 * 3 : LCR
853 * 4 : MCR
854 *
855 * 0x08 : SP1/2 Control Reg
856 *****************************************************************************/
857
858//NEED to check the following Block
859
860 status = 0;
861 Data = 0x0;
862 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
863 if (status < 0) {
864 dbg("Reading Spreg failed\n");
865 return -1;
866 }
867 Data |= 0x80;
868 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
869 if (status < 0) {
870 dbg("writing Spreg failed\n");
871 return -1;
872 }
873
874 Data &= ~0x80;
875 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
876 if (status < 0) {
877 dbg("writing Spreg failed\n");
878 return -1;
879 }
880//End of block to be checked
881
882 status = 0;
883 Data = 0x0;
884 status =
885 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
886 if (status < 0) {
887 dbg("Reading Controlreg failed\n");
888 return -1;
889 }
890 Data |= 0x08; //Driver done bit
891 Data |= 0x20; //rx_disable
892 status = 0;
893 status =
894 mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
895 if (status < 0) {
896 dbg("writing Controlreg failed\n");
897 return -1;
898 }
899 //do register settings here
900 // Set all regs to the device default values.
901 ////////////////////////////////////
902 // First Disable all interrupts.
903 ////////////////////////////////////
904
905 Data = 0x00;
906 status = 0;
907 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
908 if (status < 0) {
909 dbg("disableing interrupts failed\n");
910 return -1;
911 }
912 // Set FIFO_CONTROL_REGISTER to the default value
913 Data = 0x00;
914 status = 0;
915 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
916 if (status < 0) {
917 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
918 return -1;
919 }
920
921 Data = 0xcf;
922 status = 0;
923 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
924 if (status < 0) {
925 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
926 return -1;
927 }
928
929 Data = 0x03;
930 status = 0;
931 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
932 mos7840_port->shadowLCR = Data;
933
934 Data = 0x0b;
935 status = 0;
936 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
937 mos7840_port->shadowMCR = Data;
938
939 Data = 0x00;
940 status = 0;
941 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
942 mos7840_port->shadowLCR = Data;
943
944 Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80
945 status = 0;
946 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
947
948 Data = 0x0c;
949 status = 0;
950 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
951
952 Data = 0x0;
953 status = 0;
954 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
955
956 Data = 0x00;
957 status = 0;
958 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
959
960 Data = Data & ~SERIAL_LCR_DLAB;
961 status = 0;
962 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
963 mos7840_port->shadowLCR = Data;
964
965 //clearing Bulkin and Bulkout Fifo
966 Data = 0x0;
967 status = 0;
968 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
969
970 Data = Data | 0x0c;
971 status = 0;
972 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
973
974 Data = Data & ~0x0c;
975 status = 0;
976 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
977 //Finally enable all interrupts
978 Data = 0x0;
979 Data = 0x0c;
980 status = 0;
981 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
982
983 //clearing rx_disable
984 Data = 0x0;
985 status = 0;
986 status =
987 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
988 Data = Data & ~0x20;
989 status = 0;
990 status =
991 mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
992
993 // rx_negate
994 Data = 0x0;
995 status = 0;
996 status =
997 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
998 Data = Data | 0x10;
999 status = 0;
1000 status =
1001 mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
1002
1003 /* force low_latency on so that our tty_push actually forces *
1004 * the data through,otherwise it is scheduled, and with *
1005 * high data rates (like with OHCI) data can get lost. */
1006
1007 if (port->tty)
1008 port->tty->low_latency = 1;
1009/* Check to see if we've set up our endpoint info yet *
1010 * (can't set it up in mos7840_startup as the structures *
1011 * were not set up at that time.) */
1012 if (mos7840_num_open_ports == 1) {
1013 if (serial->port[0]->interrupt_in_buffer == NULL) {
1014
1015 /* set up interrupt urb */
1016
1017 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1018 serial->dev,
1019 usb_rcvintpipe(serial->dev,
1020 serial->port[0]->
1021 interrupt_in_endpointAddress),
1022 serial->port[0]->interrupt_in_buffer,
1023 serial->port[0]->interrupt_in_urb->
1024 transfer_buffer_length,
1025 mos7840_interrupt_callback,
1026 serial,
1027 serial->port[0]->interrupt_in_urb->
1028 interval);
1029
1030 /* start interrupt read for mos7840 *
1031 * will continue as long as mos7840 is connected */
1032
1033 response =
1034 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1035 GFP_KERNEL);
1036 if (response) {
1037 err("%s - Error %d submitting interrupt urb",
1038 __FUNCTION__, response);
1039 }
1040
1041 }
1042
1043 }
1044
1045 /* see if we've set up our endpoint info yet *
1046 * (can't set it up in mos7840_startup as the *
1047 * structures were not set up at that time.) */
1048
1049 dbg("port number is %d \n", port->number);
1050 dbg("serial number is %d \n", port->serial->minor);
1051 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress);
1052 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress);
1053 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress);
1054 dbg("port's number in the device is %d\n", mos7840_port->port_num);
1055 mos7840_port->read_urb = port->read_urb;
1056
1057 /* set up our bulk in urb */
1058
1059 usb_fill_bulk_urb(mos7840_port->read_urb,
1060 serial->dev,
1061 usb_rcvbulkpipe(serial->dev,
1062 port->bulk_in_endpointAddress),
1063 port->bulk_in_buffer,
1064 mos7840_port->read_urb->transfer_buffer_length,
1065 mos7840_bulk_in_callback, mos7840_port);
1066
1067 dbg("mos7840_open: bulkin endpoint is %d\n",
1068 port->bulk_in_endpointAddress);
1069 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1070 if (response) {
1071 err("%s - Error %d submitting control urb", __FUNCTION__,
1072 response);
1073 }
1074
1075 /* initialize our wait queues */
1076 init_waitqueue_head(&mos7840_port->wait_chase);
1077 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1078
1079 /* initialize our icount structure */
1080 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1081
1082 /* initialize our port settings */
1083 mos7840_port->shadowMCR = MCR_MASTER_IE; /* Must set to enable ints! */
1084 /* send a open port command */
1085 mos7840_port->open = 1;
1086 //mos7840_change_port_settings(mos7840_port,old_termios);
1087 mos7840_port->icount.tx = 0;
1088 mos7840_port->icount.rx = 0;
1089
97c4965d 1090 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n", serial, mos7840_port, port);
3f542974
PS		 1091
1092 return 0;
1093
1094}
1095
1096/*****************************************************************************
1097 * mos7840_chars_in_buffer
1098 * this function is called by the tty driver when it wants to know how many
1099 * bytes of data we currently have outstanding in the port (data that has
1100 * been written, but hasn't made it out the port yet)
1101 * If successful, we return the number of bytes left to be written in the
1102 * system,
1103 * Otherwise we return a negative error number.
1104 *****************************************************************************/
1105
1106static int mos7840_chars_in_buffer(struct usb_serial_port *port)
1107{
1108 int i;
1109 int chars = 0;
1110 struct moschip_port *mos7840_port;
1111
1112 dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
1113
1114 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1115 dbg("%s", "Invalid port \n");
1116 return -1;
1117 }
1118
1119 mos7840_port = mos7840_get_port_private(port);
1120 if (mos7840_port == NULL) {
1121 dbg("%s \n", "mos7840_break:leaving ...........");
1122 return -1;
1123 }
1124
1125 for (i = 0; i < NUM_URBS; ++i) {
1126 if (mos7840_port->write_urb_pool[i]->status == -EINPROGRESS) {
1127 chars += URB_TRANSFER_BUFFER_SIZE;
1128 }
1129 }
1130 dbg("%s - returns %d", __FUNCTION__, chars);
1131 return (chars);
1132
1133}
1134
1135/************************************************************************
1136 *
1137 * mos7840_block_until_tx_empty
1138 *
1139 * This function will block the close until one of the following:
1140 * 1. TX count are 0
1141 * 2. The mos7840 has stopped
1142 * 3. A timout of 3 seconds without activity has expired
1143 *
1144 ************************************************************************/
1145static void mos7840_block_until_tx_empty(struct moschip_port *mos7840_port)
1146{
1147 int timeout = HZ / 10;
1148 int wait = 30;
1149 int count;
1150
1151 while (1) {
1152
1153 count = mos7840_chars_in_buffer(mos7840_port->port);
1154
1155 /* Check for Buffer status */
1156 if (count <= 0) {
1157 return;
1158 }
1159
1160 /* Block the thread for a while */
1161 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1162 timeout);
1163
1164 /* No activity.. count down section */
1165 wait--;
1166 if (wait == 0) {
1167 dbg("%s - TIMEOUT", __FUNCTION__);
1168 return;
1169 } else {
1170 /* Reset timout value back to seconds */
1171 wait = 30;
1172 }
1173 }
1174}
1175
1176/*****************************************************************************
1177 * mos7840_close
1178 * this function is called by the tty driver when a port is closed
1179 *****************************************************************************/
1180
1181static void mos7840_close(struct usb_serial_port *port, struct file *filp)
1182{
1183 struct usb_serial *serial;
1184 struct moschip_port *mos7840_port;
1185 int j;
1186 __u16 Data;
1187
1188 dbg("%s\n", "mos7840_close:entering...");
1189
1190 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1191 dbg("%s", "Port Paranoia failed \n");
1192 return;
1193 }
1194
1195 serial = mos7840_get_usb_serial(port, __FUNCTION__);
1196 if (!serial) {
1197 dbg("%s", "Serial Paranoia failed \n");
1198 return;
1199 }
1200
1201 mos7840_port = mos7840_get_port_private(port);
1202
1203 if (mos7840_port == NULL) {
1204 return;
1205 }
1206
1207 for (j = 0; j < NUM_URBS; ++j)
1208 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1209
1210 /* Freeing Write URBs */
1211 for (j = 0; j < NUM_URBS; ++j) {
1212 if (mos7840_port->write_urb_pool[j]) {
1213 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1214 kfree(mos7840_port->write_urb_pool[j]->
1215 transfer_buffer);
1216
1217 usb_free_urb(mos7840_port->write_urb_pool[j]);
1218 }
1219 }
1220
1221 if (serial->dev) {
1222 /* flush and block until tx is empty */
1223 mos7840_block_until_tx_empty(mos7840_port);
1224 }
1225
1226 /* While closing port, shutdown all bulk read, write *
1227 * and interrupt read if they exists */
1228 if (serial->dev) {
1229
1230 if (mos7840_port->write_urb) {
1231 dbg("%s", "Shutdown bulk write\n");
1232 usb_kill_urb(mos7840_port->write_urb);
1233 }
1234
1235 if (mos7840_port->read_urb) {
1236 dbg("%s", "Shutdown bulk read\n");
1237 usb_kill_urb(mos7840_port->read_urb);
1238 }
1239 if ((&mos7840_port->control_urb)) {
1240 dbg("%s", "Shutdown control read\n");
1241 // usb_kill_urb (mos7840_port->control_urb);
1242
1243 }
1244 }
1245// if(mos7840_port->ctrl_buf != NULL)
1246// kfree(mos7840_port->ctrl_buf);
1247 mos7840_num_open_ports--;
1248 dbg("mos7840_num_open_ports in close%d:in port%d\n",
1249 mos7840_num_open_ports, port->number);
1250 if (mos7840_num_open_ports == 0) {
1251 if (serial->port[0]->interrupt_in_urb) {
1252 dbg("%s", "Shutdown interrupt_in_urb\n");
1253 }
1254 }
1255
1256 if (mos7840_port->write_urb) {
1257 /* if this urb had a transfer buffer already (old tx) free it */
1258
1259 if (mos7840_port->write_urb->transfer_buffer != NULL) {
1260 kfree(mos7840_port->write_urb->transfer_buffer);
1261 }
1262 usb_free_urb(mos7840_port->write_urb);
1263 }
1264
1265 Data = 0x0;
1266 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1267
1268 Data = 0x00;
1269 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1270
1271 mos7840_port->open = 0;
1272
1273 dbg("%s \n", "Leaving ............");
1274}
1275
1276/************************************************************************
1277 *
1278 * mos7840_block_until_chase_response
1279 *
1280 * This function will block the close until one of the following:
1281 * 1. Response to our Chase comes from mos7840
1282 * 2. A timout of 10 seconds without activity has expired
1283 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1284 *
1285 ************************************************************************/
1286
1287static void mos7840_block_until_chase_response(struct moschip_port
1288 *mos7840_port)
1289{
1290 int timeout = 1 * HZ;
1291 int wait = 10;
1292 int count;
1293
1294 while (1) {
1295 count = mos7840_chars_in_buffer(mos7840_port->port);
1296
1297 /* Check for Buffer status */
1298 if (count <= 0) {
1299 return;
1300 }
1301
1302 /* Block the thread for a while */
1303 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1304 timeout);
1305 /* No activity.. count down section */
1306 wait--;
1307 if (wait == 0) {
1308 dbg("%s - TIMEOUT", __FUNCTION__);
1309 return;
1310 } else {
1311 /* Reset timout value back to seconds */
1312 wait = 10;
1313 }
1314 }
1315
1316}
1317
1318/*****************************************************************************
1319 * mos7840_break
1320 * this function sends a break to the port
1321 *****************************************************************************/
1322static void mos7840_break(struct usb_serial_port *port, int break_state)
1323{
1324 unsigned char data;
1325 struct usb_serial *serial;
1326 struct moschip_port *mos7840_port;
1327
1328 dbg("%s \n", "Entering ...........");
1329 dbg("mos7840_break: Start\n");
1330
1331 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1332 dbg("%s", "Port Paranoia failed \n");
1333 return;
1334 }
1335
1336 serial = mos7840_get_usb_serial(port, __FUNCTION__);
1337 if (!serial) {
1338 dbg("%s", "Serial Paranoia failed \n");
1339 return;
1340 }
1341
1342 mos7840_port = mos7840_get_port_private(port);
1343
1344 if (mos7840_port == NULL) {
1345 return;
1346 }
1347
1348 if (serial->dev) {
1349
1350 /* flush and block until tx is empty */
1351 mos7840_block_until_chase_response(mos7840_port);
1352 }
1353
1354 if (break_state == -1) {
1355 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1356 } else {
1357 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1358 }
1359
1360 mos7840_port->shadowLCR = data;
1361 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
1362 mos7840_port->shadowLCR);
1363 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1364 mos7840_port->shadowLCR);
1365
1366 return;
1367}
1368
1369/*****************************************************************************
1370 * mos7840_write_room
1371 * this function is called by the tty driver when it wants to know how many
1372 * bytes of data we can accept for a specific port.
1373 * If successful, we return the amount of room that we have for this port
1374 * Otherwise we return a negative error number.
1375 *****************************************************************************/
1376
1377static int mos7840_write_room(struct usb_serial_port *port)
1378{
1379 int i;
1380 int room = 0;
1381 struct moschip_port *mos7840_port;
1382
1383 dbg("%s \n", " mos7840_write_room:entering ...........");
1384
1385 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1386 dbg("%s", "Invalid port \n");
1387 dbg("%s \n", " mos7840_write_room:leaving ...........");
1388 return -1;
1389 }
1390
1391 mos7840_port = mos7840_get_port_private(port);
1392 if (mos7840_port == NULL) {
1393 dbg("%s \n", "mos7840_break:leaving ...........");
1394 return -1;
1395 }
1396
1397 for (i = 0; i < NUM_URBS; ++i) {
1398 if (mos7840_port->write_urb_pool[i]->status != -EINPROGRESS) {
1399 room += URB_TRANSFER_BUFFER_SIZE;
1400 }
1401 }
1402
1403 dbg("%s - returns %d", __FUNCTION__, room);
1404 return (room);
1405
1406}
1407
1408/*****************************************************************************
1409 * mos7840_write
1410 * this function is called by the tty driver when data should be written to
1411 * the port.
1412 * If successful, we return the number of bytes written, otherwise we
1413 * return a negative error number.
1414 *****************************************************************************/
1415
1416static int mos7840_write(struct usb_serial_port *port,
1417 const unsigned char *data, int count)
1418{
1419 int status;
1420 int i;
1421 int bytes_sent = 0;
1422 int transfer_size;
3f542974
PS		 1423
1424 struct moschip_port *mos7840_port;
1425 struct usb_serial *serial;
1426 struct urb *urb;
1427 //__u16 Data;
1428 const unsigned char *current_position = data;
1429 unsigned char *data1;
1430 dbg("%s \n", "entering ...........");
1431 //dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",mos7840_port->shadowLCR);
1432
1433#ifdef NOTMOS7840
1434 Data = 0x00;
1435 status = 0;
1436 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1437 mos7840_port->shadowLCR = Data;
1438 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
1439 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1440 mos7840_port->shadowLCR);
1441
1442 //Data = 0x03;
1443 //status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data);
1444 //mos7840_port->shadowLCR=Data;//Need to add later
1445
1446 Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80
1447 status = 0;
1448 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1449
1450 //Data = 0x0c;
1451 //status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data);
1452 Data = 0x00;
1453 status = 0;
1454 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1455 dbg("mos7840_write:DLL value is %x\n", Data);
1456
1457 Data = 0x0;
1458 status = 0;
1459 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1460 dbg("mos7840_write:DLM value is %x\n", Data);
1461
1462 Data = Data & ~SERIAL_LCR_DLAB;
1463 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1464 mos7840_port->shadowLCR);
1465 status = 0;
1466 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1467#endif
1468
1469 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1470 dbg("%s", "Port Paranoia failed \n");
1471 return -1;
1472 }
1473
1474 serial = port->serial;
1475 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
1476 dbg("%s", "Serial Paranoia failed \n");
1477 return -1;
1478 }
1479
1480 mos7840_port = mos7840_get_port_private(port);
1481 if (mos7840_port == NULL) {
1482 dbg("%s", "mos7840_port is NULL\n");
1483 return -1;
1484 }
1485
1486 /* try to find a free urb in the list */
1487 urb = NULL;
1488
1489 for (i = 0; i < NUM_URBS; ++i) {
1490 if (mos7840_port->write_urb_pool[i]->status != -EINPROGRESS) {
1491 urb = mos7840_port->write_urb_pool[i];
1492 dbg("\nURB:%d", i);
1493 break;
1494 }
1495 }
1496
1497 if (urb == NULL) {
1498 dbg("%s - no more free urbs", __FUNCTION__);
1499 goto exit;
1500 }
1501
1502 if (urb->transfer_buffer == NULL) {
1503 urb->transfer_buffer =
1504 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1505
1506 if (urb->transfer_buffer == NULL) {
1507 err("%s no more kernel memory...", __FUNCTION__);
1508 goto exit;
1509 }
1510 }
1511 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1512
97c4965d 1513 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1514
1515 /* fill urb with data and submit */
1516 usb_fill_bulk_urb(urb,
1517 serial->dev,
1518 usb_sndbulkpipe(serial->dev,
1519 port->bulk_out_endpointAddress),
1520 urb->transfer_buffer,
1521 transfer_size,
1522 mos7840_bulk_out_data_callback, mos7840_port);
1523
1524 data1 = urb->transfer_buffer;
1525 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress);
1526
1527 /* send it down the pipe */
1528 status = usb_submit_urb(urb, GFP_ATOMIC);
1529
1530 if (status) {
1531 err("%s - usb_submit_urb(write bulk) failed with status = %d",
1532 __FUNCTION__, status);
1533 bytes_sent = status;
1534 goto exit;
1535 }
1536 bytes_sent = transfer_size;
1537 mos7840_port->icount.tx += transfer_size;
1538 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
1539 exit:
1540
1541 return bytes_sent;
1542
1543}
1544
1545/*****************************************************************************
1546 * mos7840_throttle
1547 * this function is called by the tty driver when it wants to stop the data
1548 * being read from the port.
1549 *****************************************************************************/
1550
1551static void mos7840_throttle(struct usb_serial_port *port)
1552{
1553 struct moschip_port *mos7840_port;
1554 struct tty_struct *tty;
1555 int status;
1556
1557 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1558 dbg("%s", "Invalid port \n");
1559 return;
1560 }
1561
1562 dbg("- port %d\n", port->number);
1563
1564 mos7840_port = mos7840_get_port_private(port);
1565
1566 if (mos7840_port == NULL)
1567 return;
1568
1569 if (!mos7840_port->open) {
1570 dbg("%s\n", "port not opened");
1571 return;
1572 }
1573
1574 dbg("%s", "Entering .......... \n");
1575
1576 tty = port->tty;
1577 if (!tty) {
1578 dbg("%s - no tty available", __FUNCTION__);
1579 return;
1580 }
1581
1582 /* if we are implementing XON/XOFF, send the stop character */
1583 if (I_IXOFF(tty)) {
1584 unsigned char stop_char = STOP_CHAR(tty);
1585 status = mos7840_write(port, &stop_char, 1);
1586 if (status <= 0) {
1587 return;
1588 }
1589 }
1590
1591 /* if we are implementing RTS/CTS, toggle that line */
1592 if (tty->termios->c_cflag & CRTSCTS) {
1593 mos7840_port->shadowMCR &= ~MCR_RTS;
1594 status = 0;
1595 status =
1596 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1597 mos7840_port->shadowMCR);
1598
1599 if (status < 0) {
1600 return;
1601 }
1602 }
1603
1604 return;
1605}
1606
1607/*****************************************************************************
1608 * mos7840_unthrottle
1609 * this function is called by the tty driver when it wants to resume the data
1610 * being read from the port (called after SerialThrottle is called)
1611 *****************************************************************************/
1612static void mos7840_unthrottle(struct usb_serial_port *port)
1613{
1614 struct tty_struct *tty;
1615 int status;
1616 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1617
1618 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1619 dbg("%s", "Invalid port \n");
1620 return;
1621 }
1622
1623 if (mos7840_port == NULL)
1624 return;
1625
1626 if (!mos7840_port->open) {
1627 dbg("%s - port not opened", __FUNCTION__);
1628 return;
1629 }
1630
1631 dbg("%s", "Entering .......... \n");
1632
1633 tty = port->tty;
1634 if (!tty) {
1635 dbg("%s - no tty available", __FUNCTION__);
1636 return;
1637 }
1638
1639 /* if we are implementing XON/XOFF, send the start character */
1640 if (I_IXOFF(tty)) {
1641 unsigned char start_char = START_CHAR(tty);
1642 status = mos7840_write(port, &start_char, 1);
1643 if (status <= 0) {
1644 return;
1645 }
1646 }
1647
1648 /* if we are implementing RTS/CTS, toggle that line */
1649 if (tty->termios->c_cflag & CRTSCTS) {
1650 mos7840_port->shadowMCR |= MCR_RTS;
1651 status = 0;
1652 status =
1653 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1654 mos7840_port->shadowMCR);
1655 if (status < 0) {
1656 return;
1657 }
1658 }
1659
1660 return;
1661}
1662
1663static int mos7840_tiocmget(struct usb_serial_port *port, struct file *file)
1664{
1665 struct moschip_port *mos7840_port;
1666 unsigned int result;
1667 __u16 msr;
1668 __u16 mcr;
1669 int status = 0;
1670 mos7840_port = mos7840_get_port_private(port);
1671
1672 dbg("%s - port %d", __FUNCTION__, port->number);
1673
1674 if (mos7840_port == NULL)
1675 return -ENODEV;
1676
1677 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1678 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1679 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1680 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1681 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1682 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1683 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1684 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1685 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1686
1687 dbg("%s - 0x%04X", __FUNCTION__, result);
1688
1689 return result;
1690}
1691
1692static int mos7840_tiocmset(struct usb_serial_port *port, struct file *file,
1693 unsigned int set, unsigned int clear)
1694{
1695 struct moschip_port *mos7840_port;
1696 unsigned int mcr;
1697 unsigned int status;
1698
1699 dbg("%s - port %d", __FUNCTION__, port->number);
1700
1701 mos7840_port = mos7840_get_port_private(port);
1702
1703 if (mos7840_port == NULL)
1704 return -ENODEV;
1705
1706 mcr = mos7840_port->shadowMCR;
1707 if (clear & TIOCM_RTS)
1708 mcr &= ~MCR_RTS;
1709 if (clear & TIOCM_DTR)
1710 mcr &= ~MCR_DTR;
1711 if (clear & TIOCM_LOOP)
1712 mcr &= ~MCR_LOOPBACK;
1713
1714 if (set & TIOCM_RTS)
1715 mcr |= MCR_RTS;
1716 if (set & TIOCM_DTR)
1717 mcr |= MCR_DTR;
1718 if (set & TIOCM_LOOP)
1719 mcr |= MCR_LOOPBACK;
1720
1721 mos7840_port->shadowMCR = mcr;
1722
1723 status = 0;
1724 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1725 if (status < 0) {
1726 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
1727 return -1;
1728 }
1729
1730 return 0;
1731}
1732
1733/*****************************************************************************
1734 * mos7840_calc_baud_rate_divisor
1735 * this function calculates the proper baud rate divisor for the specified
1736 * baud rate.
1737 *****************************************************************************/
1738static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1739 __u16 * clk_sel_val)
1740{
1741
1742 dbg("%s - %d", __FUNCTION__, baudRate);
1743
1744 if (baudRate <= 115200) {
1745 *divisor = 115200 / baudRate;
1746 *clk_sel_val = 0x0;
1747 }
1748 if ((baudRate > 115200) && (baudRate <= 230400)) {
1749 *divisor = 230400 / baudRate;
1750 *clk_sel_val = 0x10;
1751 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1752 *divisor = 403200 / baudRate;
1753 *clk_sel_val = 0x20;
1754 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1755 *divisor = 460800 / baudRate;
1756 *clk_sel_val = 0x30;
1757 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1758 *divisor = 806400 / baudRate;
1759 *clk_sel_val = 0x40;
1760 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1761 *divisor = 921600 / baudRate;
1762 *clk_sel_val = 0x50;
1763 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1764 *divisor = 1572864 / baudRate;
1765 *clk_sel_val = 0x60;
1766 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1767 *divisor = 3145728 / baudRate;
1768 *clk_sel_val = 0x70;
1769 }
1770 return 0;
1771
1772#ifdef NOTMCS7840
1773
1774 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1775 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1776 *divisor = mos7840_divisor_table[i].Divisor;
1777 return 0;
1778 }
1779 }
1780
1781 /* After trying for all the standard baud rates *
1782 * Try calculating the divisor for this baud rate */
1783
1784 if (baudrate > 75 && baudrate < 230400) {
1785 /* get the divisor */
1786 custom = (__u16) (230400L / baudrate);
1787
1788 /* Check for round off */
1789 round1 = (__u16) (2304000L / baudrate);
1790 round = (__u16) (round1 - (custom * 10));
1791 if (round > 4) {
1792 custom++;
1793 }
1794 *divisor = custom;
1795
1796 dbg(" Baud %d = %d\n", baudrate, custom);
1797 return 0;
1798 }
1799
1800 dbg("%s\n", " Baud calculation Failed...");
1801 return -1;
1802#endif
1803}
1804
1805/*****************************************************************************
1806 * mos7840_send_cmd_write_baud_rate
1807 * this function sends the proper command to change the baud rate of the
1808 * specified port.
1809 *****************************************************************************/
1810
1811static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1812 int baudRate)
1813{
1814 int divisor = 0;
1815 int status;
1816 __u16 Data;
1817 unsigned char number;
1818 __u16 clk_sel_val;
1819 struct usb_serial_port *port;
1820
1821 if (mos7840_port == NULL)
1822 return -1;
1823
1824 port = (struct usb_serial_port *)mos7840_port->port;
1825 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1826 dbg("%s", "Invalid port \n");
1827 return -1;
1828 }
1829
1830 if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) {
1831 dbg("%s", "Invalid Serial \n");
1832 return -1;
1833 }
1834
1835 dbg("%s", "Entering .......... \n");
1836
1837 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1838
1839 dbg("%s - port = %d, baud = %d", __FUNCTION__,
1840 mos7840_port->port->number, baudRate);
1841 //reset clk_uart_sel in spregOffset
1842 if (baudRate > 115200) {
1843#ifdef HW_flow_control
1844 //NOTE: need to see the pther register to modify
1845 //setting h/w flow control bit to 1;
1846 status = 0;
1847 Data = 0x2b;
1848 mos7840_port->shadowMCR = Data;
1849 status =
1850 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1851 if (status < 0) {
1852 dbg("Writing spreg failed in set_serial_baud\n");
1853 return -1;
1854 }
1855#endif
1856
1857 } else {
1858#ifdef HW_flow_control
1859 //setting h/w flow control bit to 0;
1860 status = 0;
1861 Data = 0xb;
1862 mos7840_port->shadowMCR = Data;
1863 status =
1864 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1865 if (status < 0) {
1866 dbg("Writing spreg failed in set_serial_baud\n");
1867 return -1;
1868 }
1869#endif
1870
1871 }
1872
1873 if (1) //baudRate <= 115200)
1874 {
1875 clk_sel_val = 0x0;
1876 Data = 0x0;
1877 status = 0;
1878 status =
1879 mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1880 &clk_sel_val);
1881 status =
1882 mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1883 &Data);
1884 if (status < 0) {
1885 dbg("reading spreg failed in set_serial_baud\n");
1886 return -1;
1887 }
1888 Data = (Data & 0x8f) | clk_sel_val;
1889 status = 0;
1890 status =
1891 mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1892 if (status < 0) {
1893 dbg("Writing spreg failed in set_serial_baud\n");
1894 return -1;
1895 }
1896 /* Calculate the Divisor */
1897
1898 if (status) {
1899 err("%s - bad baud rate", __FUNCTION__);
1900 dbg("%s\n", "bad baud rate");
1901 return status;
1902 }
1903 /* Enable access to divisor latch */
1904 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1905 mos7840_port->shadowLCR = Data;
1906 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1907
1908 /* Write the divisor */
1909 Data = (unsigned char)(divisor & 0xff);
1910 dbg("set_serial_baud Value to write DLL is %x\n", Data);
1911 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1912
1913 Data = (unsigned char)((divisor & 0xff00) >> 8);
1914 dbg("set_serial_baud Value to write DLM is %x\n", Data);
1915 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1916
1917 /* Disable access to divisor latch */
1918 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1919 mos7840_port->shadowLCR = Data;
1920 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1921
1922 }
1923
1924 return status;
1925}
1926
1927/*****************************************************************************
1928 * mos7840_change_port_settings
1929 * This routine is called to set the UART on the device to match
1930 * the specified new settings.
1931 *****************************************************************************/
1932
1933static void mos7840_change_port_settings(struct moschip_port *mos7840_port,
1934 struct termios *old_termios)
1935{
1936 struct tty_struct *tty;
1937 int baud;
1938 unsigned cflag;
1939 unsigned iflag;
1940 __u8 lData;
1941 __u8 lParity;
1942 __u8 lStop;
1943 int status;
1944 __u16 Data;
1945 struct usb_serial_port *port;
1946 struct usb_serial *serial;
1947
1948 if (mos7840_port == NULL)
1949 return;
1950
1951 port = (struct usb_serial_port *)mos7840_port->port;
1952
1953 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1954 dbg("%s", "Invalid port \n");
1955 return;
1956 }
1957
1958 if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) {
1959 dbg("%s", "Invalid Serial \n");
1960 return;
1961 }
1962
1963 serial = port->serial;
1964
1965 dbg("%s - port %d", __FUNCTION__, mos7840_port->port->number);
1966
1967 if (!mos7840_port->open) {
1968 dbg("%s - port not opened", __FUNCTION__);
1969 return;
1970 }
1971
1972 tty = mos7840_port->port->tty;
1973
1974 if ((!tty) || (!tty->termios)) {
1975 dbg("%s - no tty structures", __FUNCTION__);
1976 return;
1977 }
1978
1979 dbg("%s", "Entering .......... \n");
1980
1981 lData = LCR_BITS_8;
1982 lStop = LCR_STOP_1;
1983 lParity = LCR_PAR_NONE;
1984
1985 cflag = tty->termios->c_cflag;
1986 iflag = tty->termios->c_iflag;
1987
1988 /* Change the number of bits */
1989 if (cflag & CSIZE) {
1990 switch (cflag & CSIZE) {
1991 case CS5:
1992 lData = LCR_BITS_5;
1993 break;
1994
1995 case CS6:
1996 lData = LCR_BITS_6;
1997 break;
1998
1999 case CS7:
2000 lData = LCR_BITS_7;
2001 break;
2002 default:
2003 case CS8:
2004 lData = LCR_BITS_8;
2005 break;
2006 }
2007 }
2008 /* Change the Parity bit */
2009 if (cflag & PARENB) {
2010 if (cflag & PARODD) {
2011 lParity = LCR_PAR_ODD;
2012 dbg("%s - parity = odd", __FUNCTION__);
2013 } else {
2014 lParity = LCR_PAR_EVEN;
2015 dbg("%s - parity = even", __FUNCTION__);
2016 }
2017
2018 } else {
2019 dbg("%s - parity = none", __FUNCTION__);
2020 }
2021
2022 if (cflag & CMSPAR) {
2023 lParity = lParity | 0x20;
2024 }
2025
2026 /* Change the Stop bit */
2027 if (cflag & CSTOPB) {
2028 lStop = LCR_STOP_2;
2029 dbg("%s - stop bits = 2", __FUNCTION__);
2030 } else {
2031 lStop = LCR_STOP_1;
2032 dbg("%s - stop bits = 1", __FUNCTION__);
2033 }
2034
2035 /* Update the LCR with the correct value */
2036 mos7840_port->shadowLCR &=
2037 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2038 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2039
2040 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
2041 mos7840_port->shadowLCR);
2042 /* Disable Interrupts */
2043 Data = 0x00;
2044 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2045
2046 Data = 0x00;
2047 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2048
2049 Data = 0xcf;
2050 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2051
2052 /* Send the updated LCR value to the mos7840 */
2053 Data = mos7840_port->shadowLCR;
2054
2055 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2056
2057 Data = 0x00b;
2058 mos7840_port->shadowMCR = Data;
2059 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2060 Data = 0x00b;
2061 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2062
2063 /* set up the MCR register and send it to the mos7840 */
2064
2065 mos7840_port->shadowMCR = MCR_MASTER_IE;
2066 if (cflag & CBAUD) {
2067 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2068 }
2069
2070 if (cflag & CRTSCTS) {
2071 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2072
2073 } else {
2074 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2075 }
2076
2077 Data = mos7840_port->shadowMCR;
2078 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2079
2080 /* Determine divisor based on baud rate */
2081 baud = tty_get_baud_rate(tty);
2082
2083 if (!baud) {
2084 /* pick a default, any default... */
2085 dbg("%s\n", "Picked default baud...");
2086 baud = 9600;
2087 }
2088
2089 dbg("%s - baud rate = %d", __FUNCTION__, baud);
2090 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2091
2092 /* Enable Interrupts */
2093 Data = 0x0c;
2094 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2095
2096 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2097 mos7840_port->read_urb->dev = serial->dev;
2098
2099 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2100
2101 if (status) {
2102 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2103 status);
2104 }
2105 }
2106 wake_up(&mos7840_port->delta_msr_wait);
2107 mos7840_port->delta_msr_cond = 1;
2108 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
2109 mos7840_port->shadowLCR);
2110
2111 return;
2112}
2113
2114/*****************************************************************************
2115 * mos7840_set_termios
2116 * this function is called by the tty driver when it wants to change
2117 * the termios structure
2118 *****************************************************************************/
2119
2120static void mos7840_set_termios(struct usb_serial_port *port,
2121 struct termios *old_termios)
2122{
2123 int status;
2124 unsigned int cflag;
2125 struct usb_serial *serial;
2126 struct moschip_port *mos7840_port;
2127 struct tty_struct *tty;
2128 dbg("mos7840_set_termios: START\n");
2129 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
2130 dbg("%s", "Invalid port \n");
2131 return;
2132 }
2133
2134 serial = port->serial;
2135
2136 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
2137 dbg("%s", "Invalid Serial \n");
2138 return;
2139 }
2140
2141 mos7840_port = mos7840_get_port_private(port);
2142
2143 if (mos7840_port == NULL)
2144 return;
2145
2146 tty = port->tty;
2147
2148 if (!port->tty || !port->tty->termios) {
2149 dbg("%s - no tty or termios", __FUNCTION__);
2150 return;
2151 }
2152
2153 if (!mos7840_port->open) {
2154 dbg("%s - port not opened", __FUNCTION__);
2155 return;
2156 }
2157
2158 dbg("%s\n", "setting termios - ");
2159
2160 cflag = tty->termios->c_cflag;
2161
2162 if (!cflag) {
2163 dbg("%s %s\n", __FUNCTION__, "cflag is NULL");
2164 return;
2165 }
2166
2167 /* check that they really want us to change something */
2168 if (old_termios) {
2169 if ((cflag == old_termios->c_cflag) &&
2170 (RELEVANT_IFLAG(tty->termios->c_iflag) ==
2171 RELEVANT_IFLAG(old_termios->c_iflag))) {
2172 dbg("%s\n", "Nothing to change");
2173 return;
2174 }
2175 }
2176
2177 dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
2178 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2179
2180 if (old_termios) {
2181 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
2182 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2183 }
2184
2185 dbg("%s - port %d", __FUNCTION__, port->number);
2186
2187 /* change the port settings to the new ones specified */
2188
2189 mos7840_change_port_settings(mos7840_port, old_termios);
2190
2191 if (!mos7840_port->read_urb) {
2192 dbg("%s", "URB KILLED !!!!!\n");
2193 return;
2194 }
2195
2196 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2197 mos7840_port->read_urb->dev = serial->dev;
2198 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2199 if (status) {
2200 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2201 status);
2202 }
2203 }
2204 return;
2205}
2206
2207/*****************************************************************************
2208 * mos7840_get_lsr_info - get line status register info
2209 *
2210 * Purpose: Let user call ioctl() to get info when the UART physically
2211 * is emptied. On bus types like RS485, the transmitter must
2212 * release the bus after transmitting. This must be done when
2213 * the transmit shift register is empty, not be done when the
2214 * transmit holding register is empty. This functionality
2215 * allows an RS485 driver to be written in user space.
2216 *****************************************************************************/
2217
2218static int mos7840_get_lsr_info(struct moschip_port *mos7840_port,
97c4965d 2219 unsigned int __user *value)
3f542974
PS		 2220{
2221 int count;
2222 unsigned int result = 0;
2223
2224 count = mos7840_chars_in_buffer(mos7840_port->port);
2225 if (count == 0) {
2226 dbg("%s -- Empty", __FUNCTION__);
2227 result = TIOCSER_TEMT;
2228 }
2229
2230 if (copy_to_user(value, &result, sizeof(int)))
2231 return -EFAULT;
2232 return 0;
2233}
2234
2235/*****************************************************************************
2236 * mos7840_get_bytes_avail - get number of bytes available
2237 *
2238 * Purpose: Let user call ioctl to get the count of number of bytes available.
2239 *****************************************************************************/
2240
2241static int mos7840_get_bytes_avail(struct moschip_port *mos7840_port,
97c4965d 2242 unsigned int __user *value)
3f542974
PS		 2243{
2244 unsigned int result = 0;
2245 struct tty_struct *tty = mos7840_port->port->tty;
2246
2247 if (!tty)
2248 return -ENOIOCTLCMD;
2249
2250 result = tty->read_cnt;
2251
2252 dbg("%s(%d) = %d", __FUNCTION__, mos7840_port->port->number, result);
2253 if (copy_to_user(value, &result, sizeof(int)))
2254 return -EFAULT;
2255
2256 return -ENOIOCTLCMD;
2257}
2258
2259/*****************************************************************************
2260 * mos7840_set_modem_info
2261 * function to set modem info
2262 *****************************************************************************/
2263
2264static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
97c4965d 2265 unsigned int cmd, unsigned int __user *value)
3f542974
PS		 2266{
2267 unsigned int mcr;
2268 unsigned int arg;
2269 __u16 Data;
2270 int status;
2271 struct usb_serial_port *port;
2272
2273 if (mos7840_port == NULL)
2274 return -1;
2275
2276 port = (struct usb_serial_port *)mos7840_port->port;
2277 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
2278 dbg("%s", "Invalid port \n");
2279 return -1;
2280 }
2281
2282 mcr = mos7840_port->shadowMCR;
2283
2284 if (copy_from_user(&arg, value, sizeof(int)))
2285 return -EFAULT;
2286
2287 switch (cmd) {
2288 case TIOCMBIS:
2289 if (arg & TIOCM_RTS)
2290 mcr |= MCR_RTS;
2291 if (arg & TIOCM_DTR)
2292 mcr |= MCR_RTS;
2293 if (arg & TIOCM_LOOP)
2294 mcr |= MCR_LOOPBACK;
2295 break;
2296
2297 case TIOCMBIC:
2298 if (arg & TIOCM_RTS)
2299 mcr &= ~MCR_RTS;
2300 if (arg & TIOCM_DTR)
2301 mcr &= ~MCR_RTS;
2302 if (arg & TIOCM_LOOP)
2303 mcr &= ~MCR_LOOPBACK;
2304 break;
2305
2306 case TIOCMSET:
2307 /* turn off the RTS and DTR and LOOPBACK
2308 * and then only turn on what was asked to */
2309 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK);
2310 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0);
2311 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0);
2312 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0);
2313 break;
2314 }
2315
2316 mos7840_port->shadowMCR = mcr;
2317
2318 Data = mos7840_port->shadowMCR;
2319 status = 0;
2320 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2321 if (status < 0) {
2322 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
2323 return -1;
2324 }
2325
2326 return 0;
2327}
2328
2329/*****************************************************************************
2330 * mos7840_get_modem_info
2331 * function to get modem info
2332 *****************************************************************************/
2333
2334static int mos7840_get_modem_info(struct moschip_port *mos7840_port,
97c4965d 2335 unsigned int __user *value)
3f542974
PS		 2336{
2337 unsigned int result = 0;
2338 __u16 msr;
2339 unsigned int mcr = mos7840_port->shadowMCR;
2340 int status = 0;
2341 status =
2342 mos7840_get_uart_reg(mos7840_port->port, MODEM_STATUS_REGISTER,
2343 &msr);
2344 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
2345 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
2346 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
2347 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */
2348 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
2349 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
2350
2351 dbg("%s -- %x", __FUNCTION__, result);
2352
2353 if (copy_to_user(value, &result, sizeof(int)))
2354 return -EFAULT;
2355 return 0;
2356}
2357
2358/*****************************************************************************
2359 * mos7840_get_serial_info
2360 * function to get information about serial port
2361 *****************************************************************************/
2362
2363static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2364 struct serial_struct __user *retinfo)
3f542974
PS		 2365{
2366 struct serial_struct tmp;
2367
2368 if (mos7840_port == NULL)
2369 return -1;
2370
2371 if (!retinfo)
2372 return -EFAULT;
2373
2374 memset(&tmp, 0, sizeof(tmp));
2375
2376 tmp.type = PORT_16550A;
2377 tmp.line = mos7840_port->port->serial->minor;
2378 tmp.port = mos7840_port->port->number;
2379 tmp.irq = 0;
2380 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2381 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2382 tmp.baud_base = 9600;
2383 tmp.close_delay = 5 * HZ;
2384 tmp.closing_wait = 30 * HZ;
2385
2386 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2387 return -EFAULT;
2388 return 0;
2389}
2390
2391/*****************************************************************************
2392 * SerialIoctl
2393 * this function handles any ioctl calls to the driver
2394 *****************************************************************************/
2395
2396static int mos7840_ioctl(struct usb_serial_port *port, struct file *file,
2397 unsigned int cmd, unsigned long arg)
2398{
97c4965d 2399 void __user *argp = (void __user *)arg;
3f542974
PS		 2400 struct moschip_port *mos7840_port;
2401 struct tty_struct *tty;
2402
2403 struct async_icount cnow;
2404 struct async_icount cprev;
2405 struct serial_icounter_struct icount;
2406 int mosret = 0;
2407 int retval;
2408 struct tty_ldisc *ld;
2409
2410 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
2411 dbg("%s", "Invalid port \n");
2412 return -1;
2413 }
2414
2415 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2416
2417 if (mos7840_port == NULL)
2418 return -1;
2419
ad18027f
AB		 2420 tty = mos7840_port->port->tty;
2421
3f542974
PS		 2422 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
2423
2424 switch (cmd) {
2425 /* return number of bytes available */
2426
2427 case TIOCINQ:
2428 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
97c4965d 2429 return mos7840_get_bytes_avail(mos7840_port, argp);
3f542974
PS		 2430
2431 case TIOCOUTQ:
2432 dbg("%s (%d) TIOCOUTQ", __FUNCTION__, port->number);
2433 return put_user(tty->driver->chars_in_buffer ?
2434 tty->driver->chars_in_buffer(tty) : 0,
2435 (int __user *)arg);
3f542974
PS		 2436
2437 case TCFLSH:
2438 retval = tty_check_change(tty);
2439 if (retval)
2440 return retval;
2441
2442 ld = tty_ldisc_ref(tty);
2443 switch (arg) {
2444 case TCIFLUSH:
2445 if (ld && ld->flush_buffer)
2446 ld->flush_buffer(tty);
2447 break;
2448 case TCIOFLUSH:
2449 if (ld && ld->flush_buffer)
2450 ld->flush_buffer(tty);
2451 /* fall through */
2452 case TCOFLUSH:
2453 if (tty->driver->flush_buffer)
2454 tty->driver->flush_buffer(tty);
2455 break;
2456 default:
2457 tty_ldisc_deref(ld);
2458 return -EINVAL;
2459 }
2460 tty_ldisc_deref(ld);
2461 return 0;
2462
2463 case TCGETS:
2464 if (kernel_termios_to_user_termios
97c4965d 2465 ((struct termios __user *)argp, tty->termios))
3f542974
PS		 2466 return -EFAULT;
2467 return 0;
2468
2469 case TIOCSERGETLSR:
2470 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
97c4965d 2471 return mos7840_get_lsr_info(mos7840_port, argp);
3f542974
PS		 2472 return 0;
2473
2474 case TIOCMBIS:
2475 case TIOCMBIC:
2476 case TIOCMSET:
2477 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,
2478 port->number);
2479 mosret =
97c4965d 2480 mos7840_set_modem_info(mos7840_port, cmd, argp);
3f542974
PS		 2481 return mosret;
2482
2483 case TIOCMGET:
2484 dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number);
97c4965d 2485 return mos7840_get_modem_info(mos7840_port, argp);
3f542974
PS		 2486
2487 case TIOCGSERIAL:
2488 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
97c4965d 2489 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2490
2491 case TIOCSSERIAL:
2492 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
2493 break;
2494
2495 case TIOCMIWAIT:
2496 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
2497 cprev = mos7840_port->icount;
2498 while (1) {
2499 //interruptible_sleep_on(&mos7840_port->delta_msr_wait);
2500 mos7840_port->delta_msr_cond = 0;
2501 wait_event_interruptible(mos7840_port->delta_msr_wait,
2502 (mos7840_port->
2503 delta_msr_cond == 1));
2504
2505 /* see if a signal did it */
2506 if (signal_pending(current))
2507 return -ERESTARTSYS;
2508 cnow = mos7840_port->icount;
2509 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2510 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2511 return -EIO; /* no change => error */
2512 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2513 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2514 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2515 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2516 return 0;
2517 }
2518 cprev = cnow;
2519 }
2520 /* NOTREACHED */
2521 break;
2522
2523 case TIOCGICOUNT:
2524 cnow = mos7840_port->icount;
2525 icount.cts = cnow.cts;
2526 icount.dsr = cnow.dsr;
2527 icount.rng = cnow.rng;
2528 icount.dcd = cnow.dcd;
2529 icount.rx = cnow.rx;
2530 icount.tx = cnow.tx;
2531 icount.frame = cnow.frame;
2532 icount.overrun = cnow.overrun;
2533 icount.parity = cnow.parity;
2534 icount.brk = cnow.brk;
2535 icount.buf_overrun = cnow.buf_overrun;
2536
2537 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,
2538 port->number, icount.rx, icount.tx);
97c4965d 2539 if (copy_to_user(argp, &icount, sizeof(icount)))
3f542974
PS		 2540 return -EFAULT;
2541 return 0;
2542
2543 case TIOCEXBAUD:
2544 return 0;
2545 default:
2546 break;
2547 }
2548
2549 return -ENOIOCTLCMD;
2550}
2551
2552static int mos7840_calc_num_ports(struct usb_serial *serial)
2553{
2554
2555 dbg("numberofendpoints: %d \n",
2556 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
2557 dbg("numberofendpoints: %d \n",
2558 (int)serial->interface->altsetting->desc.bNumEndpoints);
2559 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
2560 mos7840_num_ports = 2;
2561 serial->type->num_ports = 2;
2562 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
2563 mos7840_num_ports = 4;
2564 serial->type->num_bulk_in = 4;
2565 serial->type->num_bulk_out = 4;
2566 serial->type->num_ports = 4;
2567 }
2568
2569 return mos7840_num_ports;
2570}
2571
2572/****************************************************************************
2573 * mos7840_startup
2574 ****************************************************************************/
2575
2576static int mos7840_startup(struct usb_serial *serial)
2577{
2578 struct moschip_port *mos7840_port;
2579 struct usb_device *dev;
2580 int i, status;
2581
2582 __u16 Data;
2583 dbg("%s \n", " mos7840_startup :entering..........");
2584
2585 if (!serial) {
2586 dbg("%s\n", "Invalid Handler");
2587 return -1;
2588 }
2589
2590 dev = serial->dev;
2591
2592 dbg("%s\n", "Entering...");
2593
2594 /* we set up the pointers to the endpoints in the mos7840_open *
2595 * function, as the structures aren't created yet. */
2596
2597 /* set up port private structures */
2598 for (i = 0; i < serial->num_ports; ++i) {
7ac9da10 2599 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
3f542974
PS		 2600 if (mos7840_port == NULL) {
2601 err("%s - Out of memory", __FUNCTION__);
2602 return -ENOMEM;
2603 }
3f542974
PS		 2604
2605 /* Initialize all port interrupt end point to port 0 int endpoint *
2606 * Our device has only one interrupt end point comman to all port */
2607
2608 mos7840_port->port = serial->port[i];
2609 mos7840_set_port_private(serial->port[i], mos7840_port);
2610
2611 mos7840_port->port_num = ((serial->port[i]->number -
2612 (serial->port[i]->serial->minor)) +
2613 1);
2614
2615 if (mos7840_port->port_num == 1) {
2616 mos7840_port->SpRegOffset = 0x0;
2617 mos7840_port->ControlRegOffset = 0x1;
2618 mos7840_port->DcrRegOffset = 0x4;
2619 } else if ((mos7840_port->port_num == 2)
2620 && (mos7840_num_ports == 4)) {
2621 mos7840_port->SpRegOffset = 0x8;
2622 mos7840_port->ControlRegOffset = 0x9;
2623 mos7840_port->DcrRegOffset = 0x16;
2624 } else if ((mos7840_port->port_num == 2)
2625 && (mos7840_num_ports == 2)) {
2626 mos7840_port->SpRegOffset = 0xa;
2627 mos7840_port->ControlRegOffset = 0xb;
2628 mos7840_port->DcrRegOffset = 0x19;
2629 } else if ((mos7840_port->port_num == 3)
2630 && (mos7840_num_ports == 4)) {
2631 mos7840_port->SpRegOffset = 0xa;
2632 mos7840_port->ControlRegOffset = 0xb;
2633 mos7840_port->DcrRegOffset = 0x19;
2634 } else if ((mos7840_port->port_num == 4)
2635 && (mos7840_num_ports == 4)) {
2636 mos7840_port->SpRegOffset = 0xc;
2637 mos7840_port->ControlRegOffset = 0xd;
2638 mos7840_port->DcrRegOffset = 0x1c;
2639 }
2640 mos7840_dump_serial_port(mos7840_port);
2641
2642 mos7840_set_port_private(serial->port[i], mos7840_port);
2643
2644 //enable rx_disable bit in control register
2645
2646 status =
2647 mos7840_get_reg_sync(serial->port[i],
2648 mos7840_port->ControlRegOffset, &Data);
2649 if (status < 0) {
2650 dbg("Reading ControlReg failed status-0x%x\n", status);
2651 break;
2652 } else
2653 dbg("ControlReg Reading success val is %x, status%d\n",
2654 Data, status);
2655 Data |= 0x08; //setting driver done bit
2656 Data |= 0x04; //sp1_bit to have cts change reflect in modem status reg
2657
2658 //Data |= 0x20; //rx_disable bit
2659 status = 0;
2660 status =
2661 mos7840_set_reg_sync(serial->port[i],
2662 mos7840_port->ControlRegOffset, Data);
2663 if (status < 0) {
2664 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2665 break;
2666 } else
2667 dbg("ControlReg Writing success(rx_disable) status%d\n",
2668 status);
2669
2670 //Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 and 0x24 in DCR3
2671 Data = 0x01;
2672 status = 0;
2673 status =
2674 mos7840_set_reg_sync(serial->port[i],
2675 (__u16) (mos7840_port->DcrRegOffset +
2676 0), Data);
2677 if (status < 0) {
2678 dbg("Writing DCR0 failed status-0x%x\n", status);
2679 break;
2680 } else
2681 dbg("DCR0 Writing success status%d\n", status);
2682
2683 Data = 0x05;
2684 status = 0;
2685 status =
2686 mos7840_set_reg_sync(serial->port[i],
2687 (__u16) (mos7840_port->DcrRegOffset +
2688 1), Data);
2689 if (status < 0) {
2690 dbg("Writing DCR1 failed status-0x%x\n", status);
2691 break;
2692 } else
2693 dbg("DCR1 Writing success status%d\n", status);
2694
2695 Data = 0x24;
2696 status = 0;
2697 status =
2698 mos7840_set_reg_sync(serial->port[i],
2699 (__u16) (mos7840_port->DcrRegOffset +
2700 2), Data);
2701 if (status < 0) {
2702 dbg("Writing DCR2 failed status-0x%x\n", status);
2703 break;
2704 } else
2705 dbg("DCR2 Writing success status%d\n", status);
2706
2707 // write values in clkstart0x0 and clkmulti 0x20
2708 Data = 0x0;
2709 status = 0;
2710 status =
2711 mos7840_set_reg_sync(serial->port[i],
2712 CLK_START_VALUE_REGISTER, Data);
2713 if (status < 0) {
2714 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2715 break;
2716 } else
2717 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2718
2719 Data = 0x20;
2720 status = 0;
2721 status =
2722 mos7840_set_reg_sync(serial->port[i], CLK_MULTI_REGISTER,
2723 Data);
2724 if (status < 0) {
2725 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
2726 status);
2727 break;
2728 } else
2729 dbg("CLK_MULTI_REGISTER Writing success status%d\n",
2730 status);
2731
2732 //write value 0x0 to scratchpad register
2733 Data = 0x00;
2734 status = 0;
2735 status =
2736 mos7840_set_uart_reg(serial->port[i], SCRATCH_PAD_REGISTER,
2737 Data);
2738 if (status < 0) {
2739 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
2740 status);
2741 break;
2742 } else
2743 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
2744 status);
2745
2746 //Zero Length flag register
2747 if ((mos7840_port->port_num != 1)
2748 && (mos7840_num_ports == 2)) {
2749
2750 Data = 0xff;
2751 status = 0;
2752 status = mos7840_set_reg_sync(serial->port[i],
2753 (__u16) (ZLP_REG1 +
2754 ((__u16)
2755 mos7840_port->
2756 port_num)),
2757 Data);
2758 dbg("ZLIP offset%x\n",
2759 (__u16) (ZLP_REG1 +
2760 ((__u16) mos7840_port->port_num)));
2761 if (status < 0) {
2762 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2763 i + 2, status);
2764 break;
2765 } else
2766 dbg("ZLP_REG%d Writing success status%d\n",
2767 i + 2, status);
2768 } else {
2769 Data = 0xff;
2770 status = 0;
2771 status = mos7840_set_reg_sync(serial->port[i],
2772 (__u16) (ZLP_REG1 +
2773 ((__u16)
2774 mos7840_port->
2775 port_num) -
2776 0x1), Data);
2777 dbg("ZLIP offset%x\n",
2778 (__u16) (ZLP_REG1 +
2779 ((__u16) mos7840_port->port_num) - 0x1));
2780 if (status < 0) {
2781 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2782 i + 1, status);
2783 break;
2784 } else
2785 dbg("ZLP_REG%d Writing success status%d\n",
2786 i + 1, status);
2787
2788 }
54e6ecb2 2789 mos7840_port->control_urb = usb_alloc_urb(0, GFP_ATOMIC);
3f542974
PS		 2790 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2791
2792 }
2793
2794 //Zero Length flag enable
2795 Data = 0x0f;
2796 status = 0;
2797 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2798 if (status < 0) {
2799 dbg("Writing ZLP_REG5 failed status-0x%x\n", status);
2800 return -1;
2801 } else
2802 dbg("ZLP_REG5 Writing success status%d\n", status);
2803
2804 /* setting configuration feature to one */
2805 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
97c4965d 2806 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
3f542974
PS		 2807 return 0;
2808}
2809
2810/****************************************************************************
2811 * mos7840_shutdown
2812 * This function is called whenever the device is removed from the usb bus.
2813 ****************************************************************************/
2814
2815static void mos7840_shutdown(struct usb_serial *serial)
2816{
2817 int i;
2818 struct moschip_port *mos7840_port;
2819 dbg("%s \n", " shutdown :entering..........");
2820
2821 if (!serial) {
2822 dbg("%s", "Invalid Handler \n");
2823 return;
2824 }
2825
2826 /* check for the ports to be closed,close the ports and disconnect */
2827
2828 /* free private structure allocated for serial port *
2829 * stop reads and writes on all ports */
2830
2831 for (i = 0; i < serial->num_ports; ++i) {
2832 mos7840_port = mos7840_get_port_private(serial->port[i]);
2833 kfree(mos7840_port->ctrl_buf);
2834 usb_kill_urb(mos7840_port->control_urb);
2835 kfree(mos7840_port);
2836 mos7840_set_port_private(serial->port[i], NULL);
2837 }
2838
2839 dbg("%s\n", "Thank u :: ");
2840
2841}
2842
2843static struct usb_serial_driver moschip7840_4port_device = {
2844 .driver = {
2845 .owner = THIS_MODULE,
2846 .name = "mos7840",
2847 },
2848 .description = DRIVER_DESC,
2849 .id_table = moschip_port_id_table,
2850 .num_interrupt_in = 1, //NUM_DONT_CARE,//1,
2851#ifdef check
2852 .num_bulk_in = 4,
2853 .num_bulk_out = 4,
2854 .num_ports = 4,
2855#endif
2856 .open = mos7840_open,
2857 .close = mos7840_close,
2858 .write = mos7840_write,
2859 .write_room = mos7840_write_room,
2860 .chars_in_buffer = mos7840_chars_in_buffer,
2861 .throttle = mos7840_throttle,
2862 .unthrottle = mos7840_unthrottle,
2863 .calc_num_ports = mos7840_calc_num_ports,
2864#ifdef MCSSerialProbe
2865 .probe = mos7840_serial_probe,
2866#endif
2867 .ioctl = mos7840_ioctl,
2868 .set_termios = mos7840_set_termios,
2869 .break_ctl = mos7840_break,
2870 .tiocmget = mos7840_tiocmget,
2871 .tiocmset = mos7840_tiocmset,
2872 .attach = mos7840_startup,
2873 .shutdown = mos7840_shutdown,
2874 .read_bulk_callback = mos7840_bulk_in_callback,
2875 .read_int_callback = mos7840_interrupt_callback,
2876};
2877
2878static struct usb_driver io_driver = {
2879 .name = "mos7840",
2880 .probe = usb_serial_probe,
2881 .disconnect = usb_serial_disconnect,
2882 .id_table = moschip_id_table_combined,
2883};
2884
2885/****************************************************************************
2886 * moschip7840_init
2887 * This is called by the module subsystem, or on startup to initialize us
2888 ****************************************************************************/
2889static int __init moschip7840_init(void)
2890{
2891 int retval;
2892
2893 dbg("%s \n", " mos7840_init :entering..........");
2894
2895 /* Register with the usb serial */
2896 retval = usb_serial_register(&moschip7840_4port_device);
2897
2898 if (retval)
2899 goto failed_port_device_register;
2900
2901 dbg("%s\n", "Entring...");
2902 info(DRIVER_DESC " " DRIVER_VERSION);
2903
2904 /* Register with the usb */
2905 retval = usb_register(&io_driver);
2906
2907 if (retval)
2908 goto failed_usb_register;
2909
2910 if (retval == 0) {
2911 dbg("%s\n", "Leaving...");
2912 return 0;
2913 }
2914
2915 failed_usb_register:
2916 usb_serial_deregister(&moschip7840_4port_device);
2917
2918 failed_port_device_register:
2919
2920 return retval;
2921}
2922
2923/****************************************************************************
2924 * moschip7840_exit
2925 * Called when the driver is about to be unloaded.
2926 ****************************************************************************/
2927static void __exit moschip7840_exit(void)
2928{
2929
2930 dbg("%s \n", " mos7840_exit :entering..........");
2931
2932 usb_deregister(&io_driver);
2933
2934 usb_serial_deregister(&moschip7840_4port_device);
2935
2936 dbg("%s\n", "Entring...");
2937}
2938
2939module_init(moschip7840_init);
2940module_exit(moschip7840_exit);
2941
2942/* Module information */
2943MODULE_DESCRIPTION(DRIVER_DESC);
2944MODULE_LICENSE("GPL");
2945
2946module_param(debug, bool, S_IRUGO | S_IWUSR);
2947MODULE_PARM_DESC(debug, "Debug enabled or not");
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