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-rw-r--r--drivers/usb/serial/mos7840.c2962
1 files changed, 2962 insertions, 0 deletions
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
new file mode 100644
index 000000000000..95bf57166c59
--- /dev/null
+++ b/drivers/usb/serial/mos7840.c
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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
424static void mos7840_control_callback(struct urb *urb, struct pt_regs *regs)
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
500static void mos7840_interrupt_callback(struct urb *urb, struct pt_regs *regs)
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
650static void mos7840_bulk_in_callback(struct urb *urb, struct pt_regs *regs)
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
729static void mos7840_bulk_out_data_callback(struct urb *urb,
730 struct pt_regs *regs)
731{
732 struct moschip_port *mos7840_port;
733 struct tty_struct *tty;
734 if (!urb) {
735 dbg("%s", "Invalid Pointer !!!!:\n");
736 return;
737 }
738
739 if (urb->status) {
740 dbg("nonzero write bulk status received:%d\n", urb->status);
741 return;
742 }
743
744 mos7840_port = (struct moschip_port *)urb->context;
745 if (!mos7840_port) {
746 dbg("%s", "NULL mos7840_port pointer \n");
747 return;
748 }
749
750 if (mos7840_port_paranoia_check(mos7840_port->port, __FUNCTION__)) {
751 dbg("%s", "Port Paranoia failed \n");
752 return;
753 }
754
755 dbg("%s \n", "Entering .........");
756
757 tty = mos7840_port->port->tty;
758
759 if (tty && mos7840_port->open) {
760 /* let the tty driver wakeup if it has a special *
761 * write_wakeup function */
762
763 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP))
764 && tty->ldisc.write_wakeup) {
765 (tty->ldisc.write_wakeup) (tty);
766 }
767
768 /* tell the tty driver that something has changed */
769 wake_up_interruptible(&tty->write_wait);
770 }
771
772}
773
774/************************************************************************/
775/* 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 */
776/************************************************************************/
777#ifdef MCSSerialProbe
778static int mos7840_serial_probe(struct usb_serial *serial,
779 const struct usb_device_id *id)
780{
781
782 /*need to implement the mode_reg reading and updating\
783 structures usb_serial_ device_type\
784 (i.e num_ports, num_bulkin,bulkout etc) */
785 /* Also we can update the changes attach */
786 return 1;
787}
788#endif
789
790/*****************************************************************************
791 * mos7840_open
792 * this function is called by the tty driver when a port is opened
793 * If successful, we return 0
794 * Otherwise we return a negative error number.
795 *****************************************************************************/
796
797static int mos7840_open(struct usb_serial_port *port, struct file *filp)
798{
799 int response;
800 int j;
801 struct usb_serial *serial;
802 struct urb *urb;
803 __u16 Data;
804 int status;
805 struct moschip_port *mos7840_port;
806
807 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
808 dbg("%s", "Port Paranoia failed \n");
809 return -ENODEV;
810 }
811
812 mos7840_num_open_ports++;
813 serial = port->serial;
814
815 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
816 dbg("%s", "Serial Paranoia failed \n");
817 return -ENODEV;
818 }
819
820 mos7840_port = mos7840_get_port_private(port);
821
822 if (mos7840_port == NULL)
823 return -ENODEV;
824
825 usb_clear_halt(serial->dev, port->write_urb->pipe);
826 usb_clear_halt(serial->dev, port->read_urb->pipe);
827
828 /* Initialising the write urb pool */
829 for (j = 0; j < NUM_URBS; ++j) {
830 urb = usb_alloc_urb(0, SLAB_ATOMIC);
831 mos7840_port->write_urb_pool[j] = urb;
832
833 if (urb == NULL) {
834 err("No more urbs???");
835 continue;
836 }
837
838 urb->transfer_buffer = NULL;
839 urb->transfer_buffer =
840 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
841 if (!urb->transfer_buffer) {
842 err("%s-out of memory for urb buffers.", __FUNCTION__);
843 continue;
844 }
845 }
846
847/*****************************************************************************
848 * Initialize MCS7840 -- Write Init values to corresponding Registers
849 *
850 * Register Index
851 * 1 : IER
852 * 2 : FCR
853 * 3 : LCR
854 * 4 : MCR
855 *
856 * 0x08 : SP1/2 Control Reg
857 *****************************************************************************/
858
859//NEED to check the following Block
860
861 status = 0;
862 Data = 0x0;
863 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
864 if (status < 0) {
865 dbg("Reading Spreg failed\n");
866 return -1;
867 }
868 Data |= 0x80;
869 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
870 if (status < 0) {
871 dbg("writing Spreg failed\n");
872 return -1;
873 }
874
875 Data &= ~0x80;
876 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
877 if (status < 0) {
878 dbg("writing Spreg failed\n");
879 return -1;
880 }
881//End of block to be checked
882
883 status = 0;
884 Data = 0x0;
885 status =
886 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
887 if (status < 0) {
888 dbg("Reading Controlreg failed\n");
889 return -1;
890 }
891 Data |= 0x08; //Driver done bit
892 Data |= 0x20; //rx_disable
893 status = 0;
894 status =
895 mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
896 if (status < 0) {
897 dbg("writing Controlreg failed\n");
898 return -1;
899 }
900 //do register settings here
901 // Set all regs to the device default values.
902 ////////////////////////////////////
903 // First Disable all interrupts.
904 ////////////////////////////////////
905
906 Data = 0x00;
907 status = 0;
908 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
909 if (status < 0) {
910 dbg("disableing interrupts failed\n");
911 return -1;
912 }
913 // Set FIFO_CONTROL_REGISTER to the default value
914 Data = 0x00;
915 status = 0;
916 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
917 if (status < 0) {
918 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
919 return -1;
920 }
921
922 Data = 0xcf;
923 status = 0;
924 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
925 if (status < 0) {
926 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
927 return -1;
928 }
929
930 Data = 0x03;
931 status = 0;
932 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
933 mos7840_port->shadowLCR = Data;
934
935 Data = 0x0b;
936 status = 0;
937 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
938 mos7840_port->shadowMCR = Data;
939
940 Data = 0x00;
941 status = 0;
942 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
943 mos7840_port->shadowLCR = Data;
944
945 Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80
946 status = 0;
947 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
948
949 Data = 0x0c;
950 status = 0;
951 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
952
953 Data = 0x0;
954 status = 0;
955 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
956
957 Data = 0x00;
958 status = 0;
959 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
960
961 Data = Data & ~SERIAL_LCR_DLAB;
962 status = 0;
963 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
964 mos7840_port->shadowLCR = Data;
965
966 //clearing Bulkin and Bulkout Fifo
967 Data = 0x0;
968 status = 0;
969 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
970
971 Data = Data | 0x0c;
972 status = 0;
973 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
974
975 Data = Data & ~0x0c;
976 status = 0;
977 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
978 //Finally enable all interrupts
979 Data = 0x0;
980 Data = 0x0c;
981 status = 0;
982 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
983
984 //clearing rx_disable
985 Data = 0x0;
986 status = 0;
987 status =
988 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
989 Data = Data & ~0x20;
990 status = 0;
991 status =
992 mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
993
994 // rx_negate
995 Data = 0x0;
996 status = 0;
997 status =
998 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
999 Data = Data | 0x10;
1000 status = 0;
1001 status =
1002 mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
1003
1004 /* force low_latency on so that our tty_push actually forces *
1005 * the data through,otherwise it is scheduled, and with *
1006 * high data rates (like with OHCI) data can get lost. */
1007
1008 if (port->tty)
1009 port->tty->low_latency = 1;
1010/* Check to see if we've set up our endpoint info yet *
1011 * (can't set it up in mos7840_startup as the structures *
1012 * were not set up at that time.) */
1013 if (mos7840_num_open_ports == 1) {
1014 if (serial->port[0]->interrupt_in_buffer == NULL) {
1015
1016 /* set up interrupt urb */
1017
1018 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1019 serial->dev,
1020 usb_rcvintpipe(serial->dev,
1021 serial->port[0]->
1022 interrupt_in_endpointAddress),
1023 serial->port[0]->interrupt_in_buffer,
1024 serial->port[0]->interrupt_in_urb->
1025 transfer_buffer_length,
1026 mos7840_interrupt_callback,
1027 serial,
1028 serial->port[0]->interrupt_in_urb->
1029 interval);
1030
1031 /* start interrupt read for mos7840 *
1032 * will continue as long as mos7840 is connected */
1033
1034 response =
1035 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1036 GFP_KERNEL);
1037 if (response) {
1038 err("%s - Error %d submitting interrupt urb",
1039 __FUNCTION__, response);
1040 }
1041
1042 }
1043
1044 }
1045
1046 /* see if we've set up our endpoint info yet *
1047 * (can't set it up in mos7840_startup as the *
1048 * structures were not set up at that time.) */
1049
1050 dbg("port number is %d \n", port->number);
1051 dbg("serial number is %d \n", port->serial->minor);
1052 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress);
1053 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress);
1054 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress);
1055 dbg("port's number in the device is %d\n", mos7840_port->port_num);
1056 mos7840_port->read_urb = port->read_urb;
1057
1058 /* set up our bulk in urb */
1059
1060 usb_fill_bulk_urb(mos7840_port->read_urb,
1061 serial->dev,
1062 usb_rcvbulkpipe(serial->dev,
1063 port->bulk_in_endpointAddress),
1064 port->bulk_in_buffer,
1065 mos7840_port->read_urb->transfer_buffer_length,
1066 mos7840_bulk_in_callback, mos7840_port);
1067
1068 dbg("mos7840_open: bulkin endpoint is %d\n",
1069 port->bulk_in_endpointAddress);
1070 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1071 if (response) {
1072 err("%s - Error %d submitting control urb", __FUNCTION__,
1073 response);
1074 }
1075
1076 /* initialize our wait queues */
1077 init_waitqueue_head(&mos7840_port->wait_chase);
1078 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1079
1080 /* initialize our icount structure */
1081 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1082
1083 /* initialize our port settings */
1084 mos7840_port->shadowMCR = MCR_MASTER_IE; /* Must set to enable ints! */
1085 /* send a open port command */
1086 mos7840_port->open = 1;
1087 //mos7840_change_port_settings(mos7840_port,old_termios);
1088 mos7840_port->icount.tx = 0;
1089 mos7840_port->icount.rx = 0;
1090
1091 dbg("\n\nusb_serial serial:%x mos7840_port:%x\n usb_serial_port port:%x\n\n", (unsigned int)serial, (unsigned int)mos7840_port, (unsigned int)port);
1092
1093 return 0;
1094
1095}
1096
1097/*****************************************************************************
1098 * mos7840_chars_in_buffer
1099 * this function is called by the tty driver when it wants to know how many
1100 * bytes of data we currently have outstanding in the port (data that has
1101 * been written, but hasn't made it out the port yet)
1102 * If successful, we return the number of bytes left to be written in the
1103 * system,
1104 * Otherwise we return a negative error number.
1105 *****************************************************************************/
1106
1107static int mos7840_chars_in_buffer(struct usb_serial_port *port)
1108{
1109 int i;
1110 int chars = 0;
1111 struct moschip_port *mos7840_port;
1112
1113 dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
1114
1115 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1116 dbg("%s", "Invalid port \n");
1117 return -1;
1118 }
1119
1120 mos7840_port = mos7840_get_port_private(port);
1121 if (mos7840_port == NULL) {
1122 dbg("%s \n", "mos7840_break:leaving ...........");
1123 return -1;
1124 }
1125
1126 for (i = 0; i < NUM_URBS; ++i) {
1127 if (mos7840_port->write_urb_pool[i]->status == -EINPROGRESS) {
1128 chars += URB_TRANSFER_BUFFER_SIZE;
1129 }
1130 }
1131 dbg("%s - returns %d", __FUNCTION__, chars);
1132 return (chars);
1133
1134}
1135
1136/************************************************************************
1137 *
1138 * mos7840_block_until_tx_empty
1139 *
1140 * This function will block the close until one of the following:
1141 * 1. TX count are 0
1142 * 2. The mos7840 has stopped
1143 * 3. A timout of 3 seconds without activity has expired
1144 *
1145 ************************************************************************/
1146static void mos7840_block_until_tx_empty(struct moschip_port *mos7840_port)
1147{
1148 int timeout = HZ / 10;
1149 int wait = 30;
1150 int count;
1151
1152 while (1) {
1153
1154 count = mos7840_chars_in_buffer(mos7840_port->port);
1155
1156 /* Check for Buffer status */
1157 if (count <= 0) {
1158 return;
1159 }
1160
1161 /* Block the thread for a while */
1162 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1163 timeout);
1164
1165 /* No activity.. count down section */
1166 wait--;
1167 if (wait == 0) {
1168 dbg("%s - TIMEOUT", __FUNCTION__);
1169 return;
1170 } else {
1171 /* Reset timout value back to seconds */
1172 wait = 30;
1173 }
1174 }
1175}
1176
1177/*****************************************************************************
1178 * mos7840_close
1179 * this function is called by the tty driver when a port is closed
1180 *****************************************************************************/
1181
1182static void mos7840_close(struct usb_serial_port *port, struct file *filp)
1183{
1184 struct usb_serial *serial;
1185 struct moschip_port *mos7840_port;
1186 int j;
1187 __u16 Data;
1188
1189 dbg("%s\n", "mos7840_close:entering...");
1190
1191 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1192 dbg("%s", "Port Paranoia failed \n");
1193 return;
1194 }
1195
1196 serial = mos7840_get_usb_serial(port, __FUNCTION__);
1197 if (!serial) {
1198 dbg("%s", "Serial Paranoia failed \n");
1199 return;
1200 }
1201
1202 mos7840_port = mos7840_get_port_private(port);
1203
1204 if (mos7840_port == NULL) {
1205 return;
1206 }
1207
1208 for (j = 0; j < NUM_URBS; ++j)
1209 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1210
1211 /* Freeing Write URBs */
1212 for (j = 0; j < NUM_URBS; ++j) {
1213 if (mos7840_port->write_urb_pool[j]) {
1214 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1215 kfree(mos7840_port->write_urb_pool[j]->
1216 transfer_buffer);
1217
1218 usb_free_urb(mos7840_port->write_urb_pool[j]);
1219 }
1220 }
1221
1222 if (serial->dev) {
1223 /* flush and block until tx is empty */
1224 mos7840_block_until_tx_empty(mos7840_port);
1225 }
1226
1227 /* While closing port, shutdown all bulk read, write *
1228 * and interrupt read if they exists */
1229 if (serial->dev) {
1230
1231 if (mos7840_port->write_urb) {
1232 dbg("%s", "Shutdown bulk write\n");
1233 usb_kill_urb(mos7840_port->write_urb);
1234 }
1235
1236 if (mos7840_port->read_urb) {
1237 dbg("%s", "Shutdown bulk read\n");
1238 usb_kill_urb(mos7840_port->read_urb);
1239 }
1240 if ((&mos7840_port->control_urb)) {
1241 dbg("%s", "Shutdown control read\n");
1242 // usb_kill_urb (mos7840_port->control_urb);
1243
1244 }
1245 }
1246// if(mos7840_port->ctrl_buf != NULL)
1247// kfree(mos7840_port->ctrl_buf);
1248 mos7840_num_open_ports--;
1249 dbg("mos7840_num_open_ports in close%d:in port%d\n",
1250 mos7840_num_open_ports, port->number);
1251 if (mos7840_num_open_ports == 0) {
1252 if (serial->port[0]->interrupt_in_urb) {
1253 dbg("%s", "Shutdown interrupt_in_urb\n");
1254 }
1255 }
1256
1257 if (mos7840_port->write_urb) {
1258 /* if this urb had a transfer buffer already (old tx) free it */
1259
1260 if (mos7840_port->write_urb->transfer_buffer != NULL) {
1261 kfree(mos7840_port->write_urb->transfer_buffer);
1262 }
1263 usb_free_urb(mos7840_port->write_urb);
1264 }
1265
1266 Data = 0x0;
1267 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1268
1269 Data = 0x00;
1270 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1271
1272 mos7840_port->open = 0;
1273
1274 dbg("%s \n", "Leaving ............");
1275}
1276
1277/************************************************************************
1278 *
1279 * mos7840_block_until_chase_response
1280 *
1281 * This function will block the close until one of the following:
1282 * 1. Response to our Chase comes from mos7840
1283 * 2. A timout of 10 seconds without activity has expired
1284 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1285 *
1286 ************************************************************************/
1287
1288static void mos7840_block_until_chase_response(struct moschip_port
1289 *mos7840_port)
1290{
1291 int timeout = 1 * HZ;
1292 int wait = 10;
1293 int count;
1294
1295 while (1) {
1296 count = mos7840_chars_in_buffer(mos7840_port->port);
1297
1298 /* Check for Buffer status */
1299 if (count <= 0) {
1300 return;
1301 }
1302
1303 /* Block the thread for a while */
1304 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1305 timeout);
1306 /* No activity.. count down section */
1307 wait--;
1308 if (wait == 0) {
1309 dbg("%s - TIMEOUT", __FUNCTION__);
1310 return;
1311 } else {
1312 /* Reset timout value back to seconds */
1313 wait = 10;
1314 }
1315 }
1316
1317}
1318
1319/*****************************************************************************
1320 * mos7840_break
1321 * this function sends a break to the port
1322 *****************************************************************************/
1323static void mos7840_break(struct usb_serial_port *port, int break_state)
1324{
1325 unsigned char data;
1326 struct usb_serial *serial;
1327 struct moschip_port *mos7840_port;
1328
1329 dbg("%s \n", "Entering ...........");
1330 dbg("mos7840_break: Start\n");
1331
1332 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1333 dbg("%s", "Port Paranoia failed \n");
1334 return;
1335 }
1336
1337 serial = mos7840_get_usb_serial(port, __FUNCTION__);
1338 if (!serial) {
1339 dbg("%s", "Serial Paranoia failed \n");
1340 return;
1341 }
1342
1343 mos7840_port = mos7840_get_port_private(port);
1344
1345 if (mos7840_port == NULL) {
1346 return;
1347 }
1348
1349 if (serial->dev) {
1350
1351 /* flush and block until tx is empty */
1352 mos7840_block_until_chase_response(mos7840_port);
1353 }
1354
1355 if (break_state == -1) {
1356 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1357 } else {
1358 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1359 }
1360
1361 mos7840_port->shadowLCR = data;
1362 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
1363 mos7840_port->shadowLCR);
1364 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1365 mos7840_port->shadowLCR);
1366
1367 return;
1368}
1369
1370/*****************************************************************************
1371 * mos7840_write_room
1372 * this function is called by the tty driver when it wants to know how many
1373 * bytes of data we can accept for a specific port.
1374 * If successful, we return the amount of room that we have for this port
1375 * Otherwise we return a negative error number.
1376 *****************************************************************************/
1377
1378static int mos7840_write_room(struct usb_serial_port *port)
1379{
1380 int i;
1381 int room = 0;
1382 struct moschip_port *mos7840_port;
1383
1384 dbg("%s \n", " mos7840_write_room:entering ...........");
1385
1386 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1387 dbg("%s", "Invalid port \n");
1388 dbg("%s \n", " mos7840_write_room:leaving ...........");
1389 return -1;
1390 }
1391
1392 mos7840_port = mos7840_get_port_private(port);
1393 if (mos7840_port == NULL) {
1394 dbg("%s \n", "mos7840_break:leaving ...........");
1395 return -1;
1396 }
1397
1398 for (i = 0; i < NUM_URBS; ++i) {
1399 if (mos7840_port->write_urb_pool[i]->status != -EINPROGRESS) {
1400 room += URB_TRANSFER_BUFFER_SIZE;
1401 }
1402 }
1403
1404 dbg("%s - returns %d", __FUNCTION__, room);
1405 return (room);
1406
1407}
1408
1409/*****************************************************************************
1410 * mos7840_write
1411 * this function is called by the tty driver when data should be written to
1412 * the port.
1413 * If successful, we return the number of bytes written, otherwise we
1414 * return a negative error number.
1415 *****************************************************************************/
1416
1417static int mos7840_write(struct usb_serial_port *port,
1418 const unsigned char *data, int count)
1419{
1420 int status;
1421 int i;
1422 int bytes_sent = 0;
1423 int transfer_size;
1424 int from_user = 0;
1425
1426 struct moschip_port *mos7840_port;
1427 struct usb_serial *serial;
1428 struct urb *urb;
1429 //__u16 Data;
1430 const unsigned char *current_position = data;
1431 unsigned char *data1;
1432 dbg("%s \n", "entering ...........");
1433 //dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",mos7840_port->shadowLCR);
1434
1435#ifdef NOTMOS7840
1436 Data = 0x00;
1437 status = 0;
1438 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1439 mos7840_port->shadowLCR = Data;
1440 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
1441 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1442 mos7840_port->shadowLCR);
1443
1444 //Data = 0x03;
1445 //status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data);
1446 //mos7840_port->shadowLCR=Data;//Need to add later
1447
1448 Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80
1449 status = 0;
1450 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1451
1452 //Data = 0x0c;
1453 //status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data);
1454 Data = 0x00;
1455 status = 0;
1456 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1457 dbg("mos7840_write:DLL value is %x\n", Data);
1458
1459 Data = 0x0;
1460 status = 0;
1461 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1462 dbg("mos7840_write:DLM value is %x\n", Data);
1463
1464 Data = Data & ~SERIAL_LCR_DLAB;
1465 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1466 mos7840_port->shadowLCR);
1467 status = 0;
1468 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1469#endif
1470
1471 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1472 dbg("%s", "Port Paranoia failed \n");
1473 return -1;
1474 }
1475
1476 serial = port->serial;
1477 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
1478 dbg("%s", "Serial Paranoia failed \n");
1479 return -1;
1480 }
1481
1482 mos7840_port = mos7840_get_port_private(port);
1483 if (mos7840_port == NULL) {
1484 dbg("%s", "mos7840_port is NULL\n");
1485 return -1;
1486 }
1487
1488 /* try to find a free urb in the list */
1489 urb = NULL;
1490
1491 for (i = 0; i < NUM_URBS; ++i) {
1492 if (mos7840_port->write_urb_pool[i]->status != -EINPROGRESS) {
1493 urb = mos7840_port->write_urb_pool[i];
1494 dbg("\nURB:%d", i);
1495 break;
1496 }
1497 }
1498
1499 if (urb == NULL) {
1500 dbg("%s - no more free urbs", __FUNCTION__);
1501 goto exit;
1502 }
1503
1504 if (urb->transfer_buffer == NULL) {
1505 urb->transfer_buffer =
1506 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1507
1508 if (urb->transfer_buffer == NULL) {
1509 err("%s no more kernel memory...", __FUNCTION__);
1510 goto exit;
1511 }
1512 }
1513 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1514
1515 if (from_user) {
1516 if (copy_from_user
1517 (urb->transfer_buffer, current_position, transfer_size)) {
1518 bytes_sent = -EFAULT;
1519 goto exit;
1520 }
1521 } else {
1522 memcpy(urb->transfer_buffer, current_position, transfer_size);
1523 }
1524
1525 /* fill urb with data and submit */
1526 usb_fill_bulk_urb(urb,
1527 serial->dev,
1528 usb_sndbulkpipe(serial->dev,
1529 port->bulk_out_endpointAddress),
1530 urb->transfer_buffer,
1531 transfer_size,
1532 mos7840_bulk_out_data_callback, mos7840_port);
1533
1534 data1 = urb->transfer_buffer;
1535 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress);
1536
1537 /* send it down the pipe */
1538 status = usb_submit_urb(urb, GFP_ATOMIC);
1539
1540 if (status) {
1541 err("%s - usb_submit_urb(write bulk) failed with status = %d",
1542 __FUNCTION__, status);
1543 bytes_sent = status;
1544 goto exit;
1545 }
1546 bytes_sent = transfer_size;
1547 mos7840_port->icount.tx += transfer_size;
1548 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
1549 exit:
1550
1551 return bytes_sent;
1552
1553}
1554
1555/*****************************************************************************
1556 * mos7840_throttle
1557 * this function is called by the tty driver when it wants to stop the data
1558 * being read from the port.
1559 *****************************************************************************/
1560
1561static void mos7840_throttle(struct usb_serial_port *port)
1562{
1563 struct moschip_port *mos7840_port;
1564 struct tty_struct *tty;
1565 int status;
1566
1567 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1568 dbg("%s", "Invalid port \n");
1569 return;
1570 }
1571
1572 dbg("- port %d\n", port->number);
1573
1574 mos7840_port = mos7840_get_port_private(port);
1575
1576 if (mos7840_port == NULL)
1577 return;
1578
1579 if (!mos7840_port->open) {
1580 dbg("%s\n", "port not opened");
1581 return;
1582 }
1583
1584 dbg("%s", "Entering .......... \n");
1585
1586 tty = port->tty;
1587 if (!tty) {
1588 dbg("%s - no tty available", __FUNCTION__);
1589 return;
1590 }
1591
1592 /* if we are implementing XON/XOFF, send the stop character */
1593 if (I_IXOFF(tty)) {
1594 unsigned char stop_char = STOP_CHAR(tty);
1595 status = mos7840_write(port, &stop_char, 1);
1596 if (status <= 0) {
1597 return;
1598 }
1599 }
1600
1601 /* if we are implementing RTS/CTS, toggle that line */
1602 if (tty->termios->c_cflag & CRTSCTS) {
1603 mos7840_port->shadowMCR &= ~MCR_RTS;
1604 status = 0;
1605 status =
1606 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1607 mos7840_port->shadowMCR);
1608
1609 if (status < 0) {
1610 return;
1611 }
1612 }
1613
1614 return;
1615}
1616
1617/*****************************************************************************
1618 * mos7840_unthrottle
1619 * this function is called by the tty driver when it wants to resume the data
1620 * being read from the port (called after SerialThrottle is called)
1621 *****************************************************************************/
1622static void mos7840_unthrottle(struct usb_serial_port *port)
1623{
1624 struct tty_struct *tty;
1625 int status;
1626 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1627
1628 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1629 dbg("%s", "Invalid port \n");
1630 return;
1631 }
1632
1633 if (mos7840_port == NULL)
1634 return;
1635
1636 if (!mos7840_port->open) {
1637 dbg("%s - port not opened", __FUNCTION__);
1638 return;
1639 }
1640
1641 dbg("%s", "Entering .......... \n");
1642
1643 tty = port->tty;
1644 if (!tty) {
1645 dbg("%s - no tty available", __FUNCTION__);
1646 return;
1647 }
1648
1649 /* if we are implementing XON/XOFF, send the start character */
1650 if (I_IXOFF(tty)) {
1651 unsigned char start_char = START_CHAR(tty);
1652 status = mos7840_write(port, &start_char, 1);
1653 if (status <= 0) {
1654 return;
1655 }
1656 }
1657
1658 /* if we are implementing RTS/CTS, toggle that line */
1659 if (tty->termios->c_cflag & CRTSCTS) {
1660 mos7840_port->shadowMCR |= MCR_RTS;
1661 status = 0;
1662 status =
1663 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1664 mos7840_port->shadowMCR);
1665 if (status < 0) {
1666 return;
1667 }
1668 }
1669
1670 return;
1671}
1672
1673static int mos7840_tiocmget(struct usb_serial_port *port, struct file *file)
1674{
1675 struct moschip_port *mos7840_port;
1676 unsigned int result;
1677 __u16 msr;
1678 __u16 mcr;
1679 int status = 0;
1680 mos7840_port = mos7840_get_port_private(port);
1681
1682 dbg("%s - port %d", __FUNCTION__, port->number);
1683
1684 if (mos7840_port == NULL)
1685 return -ENODEV;
1686
1687 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1688 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1689 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1690 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1691 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1692 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1693 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1694 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1695 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1696
1697 dbg("%s - 0x%04X", __FUNCTION__, result);
1698
1699 return result;
1700}
1701
1702static int mos7840_tiocmset(struct usb_serial_port *port, struct file *file,
1703 unsigned int set, unsigned int clear)
1704{
1705 struct moschip_port *mos7840_port;
1706 unsigned int mcr;
1707 unsigned int status;
1708
1709 dbg("%s - port %d", __FUNCTION__, port->number);
1710
1711 mos7840_port = mos7840_get_port_private(port);
1712
1713 if (mos7840_port == NULL)
1714 return -ENODEV;
1715
1716 mcr = mos7840_port->shadowMCR;
1717 if (clear & TIOCM_RTS)
1718 mcr &= ~MCR_RTS;
1719 if (clear & TIOCM_DTR)
1720 mcr &= ~MCR_DTR;
1721 if (clear & TIOCM_LOOP)
1722 mcr &= ~MCR_LOOPBACK;
1723
1724 if (set & TIOCM_RTS)
1725 mcr |= MCR_RTS;
1726 if (set & TIOCM_DTR)
1727 mcr |= MCR_DTR;
1728 if (set & TIOCM_LOOP)
1729 mcr |= MCR_LOOPBACK;
1730
1731 mos7840_port->shadowMCR = mcr;
1732
1733 status = 0;
1734 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1735 if (status < 0) {
1736 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
1737 return -1;
1738 }
1739
1740 return 0;
1741}
1742
1743/*****************************************************************************
1744 * mos7840_calc_baud_rate_divisor
1745 * this function calculates the proper baud rate divisor for the specified
1746 * baud rate.
1747 *****************************************************************************/
1748static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1749 __u16 * clk_sel_val)
1750{
1751
1752 dbg("%s - %d", __FUNCTION__, baudRate);
1753
1754 if (baudRate <= 115200) {
1755 *divisor = 115200 / baudRate;
1756 *clk_sel_val = 0x0;
1757 }
1758 if ((baudRate > 115200) && (baudRate <= 230400)) {
1759 *divisor = 230400 / baudRate;
1760 *clk_sel_val = 0x10;
1761 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1762 *divisor = 403200 / baudRate;
1763 *clk_sel_val = 0x20;
1764 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1765 *divisor = 460800 / baudRate;
1766 *clk_sel_val = 0x30;
1767 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1768 *divisor = 806400 / baudRate;
1769 *clk_sel_val = 0x40;
1770 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1771 *divisor = 921600 / baudRate;
1772 *clk_sel_val = 0x50;
1773 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1774 *divisor = 1572864 / baudRate;
1775 *clk_sel_val = 0x60;
1776 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1777 *divisor = 3145728 / baudRate;
1778 *clk_sel_val = 0x70;
1779 }
1780 return 0;
1781
1782#ifdef NOTMCS7840
1783
1784 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1785 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1786 *divisor = mos7840_divisor_table[i].Divisor;
1787 return 0;
1788 }
1789 }
1790
1791 /* After trying for all the standard baud rates *
1792 * Try calculating the divisor for this baud rate */
1793
1794 if (baudrate > 75 && baudrate < 230400) {
1795 /* get the divisor */
1796 custom = (__u16) (230400L / baudrate);
1797
1798 /* Check for round off */
1799 round1 = (__u16) (2304000L / baudrate);
1800 round = (__u16) (round1 - (custom * 10));
1801 if (round > 4) {
1802 custom++;
1803 }
1804 *divisor = custom;
1805
1806 dbg(" Baud %d = %d\n", baudrate, custom);
1807 return 0;
1808 }
1809
1810 dbg("%s\n", " Baud calculation Failed...");
1811 return -1;
1812#endif
1813}
1814
1815/*****************************************************************************
1816 * mos7840_send_cmd_write_baud_rate
1817 * this function sends the proper command to change the baud rate of the
1818 * specified port.
1819 *****************************************************************************/
1820
1821static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1822 int baudRate)
1823{
1824 int divisor = 0;
1825 int status;
1826 __u16 Data;
1827 unsigned char number;
1828 __u16 clk_sel_val;
1829 struct usb_serial_port *port;
1830
1831 if (mos7840_port == NULL)
1832 return -1;
1833
1834 port = (struct usb_serial_port *)mos7840_port->port;
1835 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1836 dbg("%s", "Invalid port \n");
1837 return -1;
1838 }
1839
1840 if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) {
1841 dbg("%s", "Invalid Serial \n");
1842 return -1;
1843 }
1844
1845 dbg("%s", "Entering .......... \n");
1846
1847 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1848
1849 dbg("%s - port = %d, baud = %d", __FUNCTION__,
1850 mos7840_port->port->number, baudRate);
1851 //reset clk_uart_sel in spregOffset
1852 if (baudRate > 115200) {
1853#ifdef HW_flow_control
1854 //NOTE: need to see the pther register to modify
1855 //setting h/w flow control bit to 1;
1856 status = 0;
1857 Data = 0x2b;
1858 mos7840_port->shadowMCR = Data;
1859 status =
1860 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1861 if (status < 0) {
1862 dbg("Writing spreg failed in set_serial_baud\n");
1863 return -1;
1864 }
1865#endif
1866
1867 } else {
1868#ifdef HW_flow_control
1869 //setting h/w flow control bit to 0;
1870 status = 0;
1871 Data = 0xb;
1872 mos7840_port->shadowMCR = Data;
1873 status =
1874 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1875 if (status < 0) {
1876 dbg("Writing spreg failed in set_serial_baud\n");
1877 return -1;
1878 }
1879#endif
1880
1881 }
1882
1883 if (1) //baudRate <= 115200)
1884 {
1885 clk_sel_val = 0x0;
1886 Data = 0x0;
1887 status = 0;
1888 status =
1889 mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1890 &clk_sel_val);
1891 status =
1892 mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1893 &Data);
1894 if (status < 0) {
1895 dbg("reading spreg failed in set_serial_baud\n");
1896 return -1;
1897 }
1898 Data = (Data & 0x8f) | clk_sel_val;
1899 status = 0;
1900 status =
1901 mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1902 if (status < 0) {
1903 dbg("Writing spreg failed in set_serial_baud\n");
1904 return -1;
1905 }
1906 /* Calculate the Divisor */
1907
1908 if (status) {
1909 err("%s - bad baud rate", __FUNCTION__);
1910 dbg("%s\n", "bad baud rate");
1911 return status;
1912 }
1913 /* Enable access to divisor latch */
1914 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1915 mos7840_port->shadowLCR = Data;
1916 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1917
1918 /* Write the divisor */
1919 Data = (unsigned char)(divisor & 0xff);
1920 dbg("set_serial_baud Value to write DLL is %x\n", Data);
1921 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1922
1923 Data = (unsigned char)((divisor & 0xff00) >> 8);
1924 dbg("set_serial_baud Value to write DLM is %x\n", Data);
1925 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1926
1927 /* Disable access to divisor latch */
1928 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1929 mos7840_port->shadowLCR = Data;
1930 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1931
1932 }
1933
1934 return status;
1935}
1936
1937/*****************************************************************************
1938 * mos7840_change_port_settings
1939 * This routine is called to set the UART on the device to match
1940 * the specified new settings.
1941 *****************************************************************************/
1942
1943static void mos7840_change_port_settings(struct moschip_port *mos7840_port,
1944 struct termios *old_termios)
1945{
1946 struct tty_struct *tty;
1947 int baud;
1948 unsigned cflag;
1949 unsigned iflag;
1950 __u8 lData;
1951 __u8 lParity;
1952 __u8 lStop;
1953 int status;
1954 __u16 Data;
1955 struct usb_serial_port *port;
1956 struct usb_serial *serial;
1957
1958 if (mos7840_port == NULL)
1959 return;
1960
1961 port = (struct usb_serial_port *)mos7840_port->port;
1962
1963 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1964 dbg("%s", "Invalid port \n");
1965 return;
1966 }
1967
1968 if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) {
1969 dbg("%s", "Invalid Serial \n");
1970 return;
1971 }
1972
1973 serial = port->serial;
1974
1975 dbg("%s - port %d", __FUNCTION__, mos7840_port->port->number);
1976
1977 if (!mos7840_port->open) {
1978 dbg("%s - port not opened", __FUNCTION__);
1979 return;
1980 }
1981
1982 tty = mos7840_port->port->tty;
1983
1984 if ((!tty) || (!tty->termios)) {
1985 dbg("%s - no tty structures", __FUNCTION__);
1986 return;
1987 }
1988
1989 dbg("%s", "Entering .......... \n");
1990
1991 lData = LCR_BITS_8;
1992 lStop = LCR_STOP_1;
1993 lParity = LCR_PAR_NONE;
1994
1995 cflag = tty->termios->c_cflag;
1996 iflag = tty->termios->c_iflag;
1997
1998 /* Change the number of bits */
1999 if (cflag & CSIZE) {
2000 switch (cflag & CSIZE) {
2001 case CS5:
2002 lData = LCR_BITS_5;
2003 break;
2004
2005 case CS6:
2006 lData = LCR_BITS_6;
2007 break;
2008
2009 case CS7:
2010 lData = LCR_BITS_7;
2011 break;
2012 default:
2013 case CS8:
2014 lData = LCR_BITS_8;
2015 break;
2016 }
2017 }
2018 /* Change the Parity bit */
2019 if (cflag & PARENB) {
2020 if (cflag & PARODD) {
2021 lParity = LCR_PAR_ODD;
2022 dbg("%s - parity = odd", __FUNCTION__);
2023 } else {
2024 lParity = LCR_PAR_EVEN;
2025 dbg("%s - parity = even", __FUNCTION__);
2026 }
2027
2028 } else {
2029 dbg("%s - parity = none", __FUNCTION__);
2030 }
2031
2032 if (cflag & CMSPAR) {
2033 lParity = lParity | 0x20;
2034 }
2035
2036 /* Change the Stop bit */
2037 if (cflag & CSTOPB) {
2038 lStop = LCR_STOP_2;
2039 dbg("%s - stop bits = 2", __FUNCTION__);
2040 } else {
2041 lStop = LCR_STOP_1;
2042 dbg("%s - stop bits = 1", __FUNCTION__);
2043 }
2044
2045 /* Update the LCR with the correct value */
2046 mos7840_port->shadowLCR &=
2047 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2048 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2049
2050 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
2051 mos7840_port->shadowLCR);
2052 /* Disable Interrupts */
2053 Data = 0x00;
2054 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2055
2056 Data = 0x00;
2057 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2058
2059 Data = 0xcf;
2060 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2061
2062 /* Send the updated LCR value to the mos7840 */
2063 Data = mos7840_port->shadowLCR;
2064
2065 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2066
2067 Data = 0x00b;
2068 mos7840_port->shadowMCR = Data;
2069 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2070 Data = 0x00b;
2071 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2072
2073 /* set up the MCR register and send it to the mos7840 */
2074
2075 mos7840_port->shadowMCR = MCR_MASTER_IE;
2076 if (cflag & CBAUD) {
2077 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2078 }
2079
2080 if (cflag & CRTSCTS) {
2081 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2082
2083 } else {
2084 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2085 }
2086
2087 Data = mos7840_port->shadowMCR;
2088 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2089
2090 /* Determine divisor based on baud rate */
2091 baud = tty_get_baud_rate(tty);
2092
2093 if (!baud) {
2094 /* pick a default, any default... */
2095 dbg("%s\n", "Picked default baud...");
2096 baud = 9600;
2097 }
2098
2099 dbg("%s - baud rate = %d", __FUNCTION__, baud);
2100 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2101
2102 /* Enable Interrupts */
2103 Data = 0x0c;
2104 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2105
2106 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2107 mos7840_port->read_urb->dev = serial->dev;
2108
2109 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2110
2111 if (status) {
2112 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2113 status);
2114 }
2115 }
2116 wake_up(&mos7840_port->delta_msr_wait);
2117 mos7840_port->delta_msr_cond = 1;
2118 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
2119 mos7840_port->shadowLCR);
2120
2121 return;
2122}
2123
2124/*****************************************************************************
2125 * mos7840_set_termios
2126 * this function is called by the tty driver when it wants to change
2127 * the termios structure
2128 *****************************************************************************/
2129
2130static void mos7840_set_termios(struct usb_serial_port *port,
2131 struct termios *old_termios)
2132{
2133 int status;
2134 unsigned int cflag;
2135 struct usb_serial *serial;
2136 struct moschip_port *mos7840_port;
2137 struct tty_struct *tty;
2138 dbg("mos7840_set_termios: START\n");
2139 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
2140 dbg("%s", "Invalid port \n");
2141 return;
2142 }
2143
2144 serial = port->serial;
2145
2146 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
2147 dbg("%s", "Invalid Serial \n");
2148 return;
2149 }
2150
2151 mos7840_port = mos7840_get_port_private(port);
2152
2153 if (mos7840_port == NULL)
2154 return;
2155
2156 tty = port->tty;
2157
2158 if (!port->tty || !port->tty->termios) {
2159 dbg("%s - no tty or termios", __FUNCTION__);
2160 return;
2161 }
2162
2163 if (!mos7840_port->open) {
2164 dbg("%s - port not opened", __FUNCTION__);
2165 return;
2166 }
2167
2168 dbg("%s\n", "setting termios - ");
2169
2170 cflag = tty->termios->c_cflag;
2171
2172 if (!cflag) {
2173 dbg("%s %s\n", __FUNCTION__, "cflag is NULL");
2174 return;
2175 }
2176
2177 /* check that they really want us to change something */
2178 if (old_termios) {
2179 if ((cflag == old_termios->c_cflag) &&
2180 (RELEVANT_IFLAG(tty->termios->c_iflag) ==
2181 RELEVANT_IFLAG(old_termios->c_iflag))) {
2182 dbg("%s\n", "Nothing to change");
2183 return;
2184 }
2185 }
2186
2187 dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
2188 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2189
2190 if (old_termios) {
2191 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
2192 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2193 }
2194
2195 dbg("%s - port %d", __FUNCTION__, port->number);
2196
2197 /* change the port settings to the new ones specified */
2198
2199 mos7840_change_port_settings(mos7840_port, old_termios);
2200
2201 if (!mos7840_port->read_urb) {
2202 dbg("%s", "URB KILLED !!!!!\n");
2203 return;
2204 }
2205
2206 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2207 mos7840_port->read_urb->dev = serial->dev;
2208 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2209 if (status) {
2210 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2211 status);
2212 }
2213 }
2214 return;
2215}
2216
2217/*****************************************************************************
2218 * mos7840_get_lsr_info - get line status register info
2219 *
2220 * Purpose: Let user call ioctl() to get info when the UART physically
2221 * is emptied. On bus types like RS485, the transmitter must
2222 * release the bus after transmitting. This must be done when
2223 * the transmit shift register is empty, not be done when the
2224 * transmit holding register is empty. This functionality
2225 * allows an RS485 driver to be written in user space.
2226 *****************************************************************************/
2227
2228static int mos7840_get_lsr_info(struct moschip_port *mos7840_port,
2229 unsigned int *value)
2230{
2231 int count;
2232 unsigned int result = 0;
2233
2234 count = mos7840_chars_in_buffer(mos7840_port->port);
2235 if (count == 0) {
2236 dbg("%s -- Empty", __FUNCTION__);
2237 result = TIOCSER_TEMT;
2238 }
2239
2240 if (copy_to_user(value, &result, sizeof(int)))
2241 return -EFAULT;
2242 return 0;
2243}
2244
2245/*****************************************************************************
2246 * mos7840_get_bytes_avail - get number of bytes available
2247 *
2248 * Purpose: Let user call ioctl to get the count of number of bytes available.
2249 *****************************************************************************/
2250
2251static int mos7840_get_bytes_avail(struct moschip_port *mos7840_port,
2252 unsigned int *value)
2253{
2254 unsigned int result = 0;
2255 struct tty_struct *tty = mos7840_port->port->tty;
2256
2257 if (!tty)
2258 return -ENOIOCTLCMD;
2259
2260 result = tty->read_cnt;
2261
2262 dbg("%s(%d) = %d", __FUNCTION__, mos7840_port->port->number, result);
2263 if (copy_to_user(value, &result, sizeof(int)))
2264 return -EFAULT;
2265
2266 return -ENOIOCTLCMD;
2267}
2268
2269/*****************************************************************************
2270 * mos7840_set_modem_info
2271 * function to set modem info
2272 *****************************************************************************/
2273
2274static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
2275 unsigned int cmd, unsigned int *value)
2276{
2277 unsigned int mcr;
2278 unsigned int arg;
2279 __u16 Data;
2280 int status;
2281 struct usb_serial_port *port;
2282
2283 if (mos7840_port == NULL)
2284 return -1;
2285
2286 port = (struct usb_serial_port *)mos7840_port->port;
2287 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
2288 dbg("%s", "Invalid port \n");
2289 return -1;
2290 }
2291
2292 mcr = mos7840_port->shadowMCR;
2293
2294 if (copy_from_user(&arg, value, sizeof(int)))
2295 return -EFAULT;
2296
2297 switch (cmd) {
2298 case TIOCMBIS:
2299 if (arg & TIOCM_RTS)
2300 mcr |= MCR_RTS;
2301 if (arg & TIOCM_DTR)
2302 mcr |= MCR_RTS;
2303 if (arg & TIOCM_LOOP)
2304 mcr |= MCR_LOOPBACK;
2305 break;
2306
2307 case TIOCMBIC:
2308 if (arg & TIOCM_RTS)
2309 mcr &= ~MCR_RTS;
2310 if (arg & TIOCM_DTR)
2311 mcr &= ~MCR_RTS;
2312 if (arg & TIOCM_LOOP)
2313 mcr &= ~MCR_LOOPBACK;
2314 break;
2315
2316 case TIOCMSET:
2317 /* turn off the RTS and DTR and LOOPBACK
2318 * and then only turn on what was asked to */
2319 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK);
2320 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0);
2321 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0);
2322 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0);
2323 break;
2324 }
2325
2326 mos7840_port->shadowMCR = mcr;
2327
2328 Data = mos7840_port->shadowMCR;
2329 status = 0;
2330 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2331 if (status < 0) {
2332 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
2333 return -1;
2334 }
2335
2336 return 0;
2337}
2338
2339/*****************************************************************************
2340 * mos7840_get_modem_info
2341 * function to get modem info
2342 *****************************************************************************/
2343
2344static int mos7840_get_modem_info(struct moschip_port *mos7840_port,
2345 unsigned int *value)
2346{
2347 unsigned int result = 0;
2348 __u16 msr;
2349 unsigned int mcr = mos7840_port->shadowMCR;
2350 int status = 0;
2351 status =
2352 mos7840_get_uart_reg(mos7840_port->port, MODEM_STATUS_REGISTER,
2353 &msr);
2354 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
2355 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
2356 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
2357 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */
2358 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
2359 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
2360
2361 dbg("%s -- %x", __FUNCTION__, result);
2362
2363 if (copy_to_user(value, &result, sizeof(int)))
2364 return -EFAULT;
2365 return 0;
2366}
2367
2368/*****************************************************************************
2369 * mos7840_get_serial_info
2370 * function to get information about serial port
2371 *****************************************************************************/
2372
2373static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2374 struct serial_struct *retinfo)
2375{
2376 struct serial_struct tmp;
2377
2378 if (mos7840_port == NULL)
2379 return -1;
2380
2381 if (!retinfo)
2382 return -EFAULT;
2383
2384 memset(&tmp, 0, sizeof(tmp));
2385
2386 tmp.type = PORT_16550A;
2387 tmp.line = mos7840_port->port->serial->minor;
2388 tmp.port = mos7840_port->port->number;
2389 tmp.irq = 0;
2390 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2391 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2392 tmp.baud_base = 9600;
2393 tmp.close_delay = 5 * HZ;
2394 tmp.closing_wait = 30 * HZ;
2395
2396 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2397 return -EFAULT;
2398 return 0;
2399}
2400
2401/*****************************************************************************
2402 * SerialIoctl
2403 * this function handles any ioctl calls to the driver
2404 *****************************************************************************/
2405
2406static int mos7840_ioctl(struct usb_serial_port *port, struct file *file,
2407 unsigned int cmd, unsigned long arg)
2408{
2409 struct moschip_port *mos7840_port;
2410 struct tty_struct *tty;
2411
2412 struct async_icount cnow;
2413 struct async_icount cprev;
2414 struct serial_icounter_struct icount;
2415 int mosret = 0;
2416 int retval;
2417 struct tty_ldisc *ld;
2418
2419 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
2420 dbg("%s", "Invalid port \n");
2421 return -1;
2422 }
2423
2424 mos7840_port = mos7840_get_port_private(port);
2425 tty = mos7840_port->port->tty;
2426
2427 if (mos7840_port == NULL)
2428 return -1;
2429
2430 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
2431
2432 switch (cmd) {
2433 /* return number of bytes available */
2434
2435 case TIOCINQ:
2436 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
2437 return mos7840_get_bytes_avail(mos7840_port,
2438 (unsigned int *)arg);
2439 break;
2440
2441 case TIOCOUTQ:
2442 dbg("%s (%d) TIOCOUTQ", __FUNCTION__, port->number);
2443 return put_user(tty->driver->chars_in_buffer ?
2444 tty->driver->chars_in_buffer(tty) : 0,
2445 (int __user *)arg);
2446 break;
2447
2448 case TCFLSH:
2449 retval = tty_check_change(tty);
2450 if (retval)
2451 return retval;
2452
2453 ld = tty_ldisc_ref(tty);
2454 switch (arg) {
2455 case TCIFLUSH:
2456 if (ld && ld->flush_buffer)
2457 ld->flush_buffer(tty);
2458 break;
2459 case TCIOFLUSH:
2460 if (ld && ld->flush_buffer)
2461 ld->flush_buffer(tty);
2462 /* fall through */
2463 case TCOFLUSH:
2464 if (tty->driver->flush_buffer)
2465 tty->driver->flush_buffer(tty);
2466 break;
2467 default:
2468 tty_ldisc_deref(ld);
2469 return -EINVAL;
2470 }
2471 tty_ldisc_deref(ld);
2472 return 0;
2473
2474 case TCGETS:
2475 if (kernel_termios_to_user_termios
2476 ((struct termios __user *)arg, tty->termios))
2477 return -EFAULT;
2478 return 0;
2479
2480 case TIOCSERGETLSR:
2481 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
2482 return mos7840_get_lsr_info(mos7840_port, (unsigned int *)arg);
2483 return 0;
2484
2485 case TIOCMBIS:
2486 case TIOCMBIC:
2487 case TIOCMSET:
2488 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,
2489 port->number);
2490 mosret =
2491 mos7840_set_modem_info(mos7840_port, cmd,
2492 (unsigned int *)arg);
2493 return mosret;
2494
2495 case TIOCMGET:
2496 dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number);
2497 return mos7840_get_modem_info(mos7840_port,
2498 (unsigned int *)arg);
2499
2500 case TIOCGSERIAL:
2501 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
2502 return mos7840_get_serial_info(mos7840_port,
2503 (struct serial_struct *)arg);
2504
2505 case TIOCSSERIAL:
2506 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
2507 break;
2508
2509 case TIOCMIWAIT:
2510 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
2511 cprev = mos7840_port->icount;
2512 while (1) {
2513 //interruptible_sleep_on(&mos7840_port->delta_msr_wait);
2514 mos7840_port->delta_msr_cond = 0;
2515 wait_event_interruptible(mos7840_port->delta_msr_wait,
2516 (mos7840_port->
2517 delta_msr_cond == 1));
2518
2519 /* see if a signal did it */
2520 if (signal_pending(current))
2521 return -ERESTARTSYS;
2522 cnow = mos7840_port->icount;
2523 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2524 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2525 return -EIO; /* no change => error */
2526 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2527 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2528 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2529 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2530 return 0;
2531 }
2532 cprev = cnow;
2533 }
2534 /* NOTREACHED */
2535 break;
2536
2537 case TIOCGICOUNT:
2538 cnow = mos7840_port->icount;
2539 icount.cts = cnow.cts;
2540 icount.dsr = cnow.dsr;
2541 icount.rng = cnow.rng;
2542 icount.dcd = cnow.dcd;
2543 icount.rx = cnow.rx;
2544 icount.tx = cnow.tx;
2545 icount.frame = cnow.frame;
2546 icount.overrun = cnow.overrun;
2547 icount.parity = cnow.parity;
2548 icount.brk = cnow.brk;
2549 icount.buf_overrun = cnow.buf_overrun;
2550
2551 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,
2552 port->number, icount.rx, icount.tx);
2553 if (copy_to_user((void *)arg, &icount, sizeof(icount)))
2554 return -EFAULT;
2555 return 0;
2556
2557 case TIOCEXBAUD:
2558 return 0;
2559 default:
2560 break;
2561 }
2562
2563 return -ENOIOCTLCMD;
2564}
2565
2566static int mos7840_calc_num_ports(struct usb_serial *serial)
2567{
2568
2569 dbg("numberofendpoints: %d \n",
2570 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
2571 dbg("numberofendpoints: %d \n",
2572 (int)serial->interface->altsetting->desc.bNumEndpoints);
2573 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
2574 mos7840_num_ports = 2;
2575 serial->type->num_ports = 2;
2576 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
2577 mos7840_num_ports = 4;
2578 serial->type->num_bulk_in = 4;
2579 serial->type->num_bulk_out = 4;
2580 serial->type->num_ports = 4;
2581 }
2582
2583 return mos7840_num_ports;
2584}
2585
2586/****************************************************************************
2587 * mos7840_startup
2588 ****************************************************************************/
2589
2590static int mos7840_startup(struct usb_serial *serial)
2591{
2592 struct moschip_port *mos7840_port;
2593 struct usb_device *dev;
2594 int i, status;
2595
2596 __u16 Data;
2597 dbg("%s \n", " mos7840_startup :entering..........");
2598
2599 if (!serial) {
2600 dbg("%s\n", "Invalid Handler");
2601 return -1;
2602 }
2603
2604 dev = serial->dev;
2605
2606 dbg("%s\n", "Entering...");
2607
2608 /* we set up the pointers to the endpoints in the mos7840_open *
2609 * function, as the structures aren't created yet. */
2610
2611 /* set up port private structures */
2612 for (i = 0; i < serial->num_ports; ++i) {
2613 mos7840_port = kmalloc(sizeof(struct moschip_port), GFP_KERNEL);
2614 if (mos7840_port == NULL) {
2615 err("%s - Out of memory", __FUNCTION__);
2616 return -ENOMEM;
2617 }
2618 memset(mos7840_port, 0, sizeof(struct moschip_port));
2619
2620 /* Initialize all port interrupt end point to port 0 int endpoint *
2621 * Our device has only one interrupt end point comman to all port */
2622
2623 mos7840_port->port = serial->port[i];
2624 mos7840_set_port_private(serial->port[i], mos7840_port);
2625
2626 mos7840_port->port_num = ((serial->port[i]->number -
2627 (serial->port[i]->serial->minor)) +
2628 1);
2629
2630 if (mos7840_port->port_num == 1) {
2631 mos7840_port->SpRegOffset = 0x0;
2632 mos7840_port->ControlRegOffset = 0x1;
2633 mos7840_port->DcrRegOffset = 0x4;
2634 } else if ((mos7840_port->port_num == 2)
2635 && (mos7840_num_ports == 4)) {
2636 mos7840_port->SpRegOffset = 0x8;
2637 mos7840_port->ControlRegOffset = 0x9;
2638 mos7840_port->DcrRegOffset = 0x16;
2639 } else if ((mos7840_port->port_num == 2)
2640 && (mos7840_num_ports == 2)) {
2641 mos7840_port->SpRegOffset = 0xa;
2642 mos7840_port->ControlRegOffset = 0xb;
2643 mos7840_port->DcrRegOffset = 0x19;
2644 } else if ((mos7840_port->port_num == 3)
2645 && (mos7840_num_ports == 4)) {
2646 mos7840_port->SpRegOffset = 0xa;
2647 mos7840_port->ControlRegOffset = 0xb;
2648 mos7840_port->DcrRegOffset = 0x19;
2649 } else if ((mos7840_port->port_num == 4)
2650 && (mos7840_num_ports == 4)) {
2651 mos7840_port->SpRegOffset = 0xc;
2652 mos7840_port->ControlRegOffset = 0xd;
2653 mos7840_port->DcrRegOffset = 0x1c;
2654 }
2655 mos7840_dump_serial_port(mos7840_port);
2656
2657 mos7840_set_port_private(serial->port[i], mos7840_port);
2658
2659 //enable rx_disable bit in control register
2660
2661 status =
2662 mos7840_get_reg_sync(serial->port[i],
2663 mos7840_port->ControlRegOffset, &Data);
2664 if (status < 0) {
2665 dbg("Reading ControlReg failed status-0x%x\n", status);
2666 break;
2667 } else
2668 dbg("ControlReg Reading success val is %x, status%d\n",
2669 Data, status);
2670 Data |= 0x08; //setting driver done bit
2671 Data |= 0x04; //sp1_bit to have cts change reflect in modem status reg
2672
2673 //Data |= 0x20; //rx_disable bit
2674 status = 0;
2675 status =
2676 mos7840_set_reg_sync(serial->port[i],
2677 mos7840_port->ControlRegOffset, Data);
2678 if (status < 0) {
2679 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2680 break;
2681 } else
2682 dbg("ControlReg Writing success(rx_disable) status%d\n",
2683 status);
2684
2685 //Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 and 0x24 in DCR3
2686 Data = 0x01;
2687 status = 0;
2688 status =
2689 mos7840_set_reg_sync(serial->port[i],
2690 (__u16) (mos7840_port->DcrRegOffset +
2691 0), Data);
2692 if (status < 0) {
2693 dbg("Writing DCR0 failed status-0x%x\n", status);
2694 break;
2695 } else
2696 dbg("DCR0 Writing success status%d\n", status);
2697
2698 Data = 0x05;
2699 status = 0;
2700 status =
2701 mos7840_set_reg_sync(serial->port[i],
2702 (__u16) (mos7840_port->DcrRegOffset +
2703 1), Data);
2704 if (status < 0) {
2705 dbg("Writing DCR1 failed status-0x%x\n", status);
2706 break;
2707 } else
2708 dbg("DCR1 Writing success status%d\n", status);
2709
2710 Data = 0x24;
2711 status = 0;
2712 status =
2713 mos7840_set_reg_sync(serial->port[i],
2714 (__u16) (mos7840_port->DcrRegOffset +
2715 2), Data);
2716 if (status < 0) {
2717 dbg("Writing DCR2 failed status-0x%x\n", status);
2718 break;
2719 } else
2720 dbg("DCR2 Writing success status%d\n", status);
2721
2722 // write values in clkstart0x0 and clkmulti 0x20
2723 Data = 0x0;
2724 status = 0;
2725 status =
2726 mos7840_set_reg_sync(serial->port[i],
2727 CLK_START_VALUE_REGISTER, Data);
2728 if (status < 0) {
2729 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2730 break;
2731 } else
2732 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2733
2734 Data = 0x20;
2735 status = 0;
2736 status =
2737 mos7840_set_reg_sync(serial->port[i], CLK_MULTI_REGISTER,
2738 Data);
2739 if (status < 0) {
2740 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
2741 status);
2742 break;
2743 } else
2744 dbg("CLK_MULTI_REGISTER Writing success status%d\n",
2745 status);
2746
2747 //write value 0x0 to scratchpad register
2748 Data = 0x00;
2749 status = 0;
2750 status =
2751 mos7840_set_uart_reg(serial->port[i], SCRATCH_PAD_REGISTER,
2752 Data);
2753 if (status < 0) {
2754 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
2755 status);
2756 break;
2757 } else
2758 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
2759 status);
2760
2761 //Zero Length flag register
2762 if ((mos7840_port->port_num != 1)
2763 && (mos7840_num_ports == 2)) {
2764
2765 Data = 0xff;
2766 status = 0;
2767 status = mos7840_set_reg_sync(serial->port[i],
2768 (__u16) (ZLP_REG1 +
2769 ((__u16)
2770 mos7840_port->
2771 port_num)),
2772 Data);
2773 dbg("ZLIP offset%x\n",
2774 (__u16) (ZLP_REG1 +
2775 ((__u16) mos7840_port->port_num)));
2776 if (status < 0) {
2777 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2778 i + 2, status);
2779 break;
2780 } else
2781 dbg("ZLP_REG%d Writing success status%d\n",
2782 i + 2, status);
2783 } else {
2784 Data = 0xff;
2785 status = 0;
2786 status = mos7840_set_reg_sync(serial->port[i],
2787 (__u16) (ZLP_REG1 +
2788 ((__u16)
2789 mos7840_port->
2790 port_num) -
2791 0x1), Data);
2792 dbg("ZLIP offset%x\n",
2793 (__u16) (ZLP_REG1 +
2794 ((__u16) mos7840_port->port_num) - 0x1));
2795 if (status < 0) {
2796 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2797 i + 1, status);
2798 break;
2799 } else
2800 dbg("ZLP_REG%d Writing success status%d\n",
2801 i + 1, status);
2802
2803 }
2804 mos7840_port->control_urb = usb_alloc_urb(0, SLAB_ATOMIC);
2805 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2806
2807 }
2808
2809 //Zero Length flag enable
2810 Data = 0x0f;
2811 status = 0;
2812 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2813 if (status < 0) {
2814 dbg("Writing ZLP_REG5 failed status-0x%x\n", status);
2815 return -1;
2816 } else
2817 dbg("ZLP_REG5 Writing success status%d\n", status);
2818
2819 /* setting configuration feature to one */
2820 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2821 (__u8) 0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 5 * HZ);
2822 return 0;
2823}
2824
2825/****************************************************************************
2826 * mos7840_shutdown
2827 * This function is called whenever the device is removed from the usb bus.
2828 ****************************************************************************/
2829
2830static void mos7840_shutdown(struct usb_serial *serial)
2831{
2832 int i;
2833 struct moschip_port *mos7840_port;
2834 dbg("%s \n", " shutdown :entering..........");
2835
2836 if (!serial) {
2837 dbg("%s", "Invalid Handler \n");
2838 return;
2839 }
2840
2841 /* check for the ports to be closed,close the ports and disconnect */
2842
2843 /* free private structure allocated for serial port *
2844 * stop reads and writes on all ports */
2845
2846 for (i = 0; i < serial->num_ports; ++i) {
2847 mos7840_port = mos7840_get_port_private(serial->port[i]);
2848 kfree(mos7840_port->ctrl_buf);
2849 usb_kill_urb(mos7840_port->control_urb);
2850 kfree(mos7840_port);
2851 mos7840_set_port_private(serial->port[i], NULL);
2852 }
2853
2854 dbg("%s\n", "Thank u :: ");
2855
2856}
2857
2858static struct usb_serial_driver moschip7840_4port_device = {
2859 .driver = {
2860 .owner = THIS_MODULE,
2861 .name = "mos7840",
2862 },
2863 .description = DRIVER_DESC,
2864 .id_table = moschip_port_id_table,
2865 .num_interrupt_in = 1, //NUM_DONT_CARE,//1,
2866#ifdef check
2867 .num_bulk_in = 4,
2868 .num_bulk_out = 4,
2869 .num_ports = 4,
2870#endif
2871 .open = mos7840_open,
2872 .close = mos7840_close,
2873 .write = mos7840_write,
2874 .write_room = mos7840_write_room,
2875 .chars_in_buffer = mos7840_chars_in_buffer,
2876 .throttle = mos7840_throttle,
2877 .unthrottle = mos7840_unthrottle,
2878 .calc_num_ports = mos7840_calc_num_ports,
2879#ifdef MCSSerialProbe
2880 .probe = mos7840_serial_probe,
2881#endif
2882 .ioctl = mos7840_ioctl,
2883 .set_termios = mos7840_set_termios,
2884 .break_ctl = mos7840_break,
2885 .tiocmget = mos7840_tiocmget,
2886 .tiocmset = mos7840_tiocmset,
2887 .attach = mos7840_startup,
2888 .shutdown = mos7840_shutdown,
2889 .read_bulk_callback = mos7840_bulk_in_callback,
2890 .read_int_callback = mos7840_interrupt_callback,
2891};
2892
2893static struct usb_driver io_driver = {
2894 .name = "mos7840",
2895 .probe = usb_serial_probe,
2896 .disconnect = usb_serial_disconnect,
2897 .id_table = moschip_id_table_combined,
2898};
2899
2900/****************************************************************************
2901 * moschip7840_init
2902 * This is called by the module subsystem, or on startup to initialize us
2903 ****************************************************************************/
2904static int __init moschip7840_init(void)
2905{
2906 int retval;
2907
2908 dbg("%s \n", " mos7840_init :entering..........");
2909
2910 /* Register with the usb serial */
2911 retval = usb_serial_register(&moschip7840_4port_device);
2912
2913 if (retval)
2914 goto failed_port_device_register;
2915
2916 dbg("%s\n", "Entring...");
2917 info(DRIVER_DESC " " DRIVER_VERSION);
2918
2919 /* Register with the usb */
2920 retval = usb_register(&io_driver);
2921
2922 if (retval)
2923 goto failed_usb_register;
2924
2925 if (retval == 0) {
2926 dbg("%s\n", "Leaving...");
2927 return 0;
2928 }
2929
2930 failed_usb_register:
2931 usb_serial_deregister(&moschip7840_4port_device);
2932
2933 failed_port_device_register:
2934
2935 return retval;
2936}
2937
2938/****************************************************************************
2939 * moschip7840_exit
2940 * Called when the driver is about to be unloaded.
2941 ****************************************************************************/
2942static void __exit moschip7840_exit(void)
2943{
2944
2945 dbg("%s \n", " mos7840_exit :entering..........");
2946
2947 usb_deregister(&io_driver);
2948
2949 usb_serial_deregister(&moschip7840_4port_device);
2950
2951 dbg("%s\n", "Entring...");
2952}
2953
2954module_init(moschip7840_init);
2955module_exit(moschip7840_exit);
2956
2957/* Module information */
2958MODULE_DESCRIPTION(DRIVER_DESC);
2959MODULE_LICENSE("GPL");
2960
2961module_param(debug, bool, S_IRUGO | S_IWUSR);
2962MODULE_PARM_DESC(debug, "Debug enabled or not");
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-03 14:57:31 -0500