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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
159 static 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
165 static __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
171 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
172
173 /* This structure holds all of the local port information */
174
175 struct 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 struct urb *int_urb;
180 __u8 shadowLCR; /* last LCR value received */
181 __u8 shadowMCR; /* last MCR value received */
182 char open;
183 char open_ports;
184 char zombie;
185 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
186 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
187 int delta_msr_cond;
188 struct async_icount icount;
189 struct usb_serial_port *port; /* loop back to the owner of this object */
190
191 /*Offsets */
192 __u8 SpRegOffset;
193 __u8 ControlRegOffset;
194 __u8 DcrRegOffset;
195 //for processing control URBS in interrupt context
196 struct urb *control_urb;
197 struct usb_ctrlrequest *dr;
198 char *ctrl_buf;
199 int MsrLsr;
200
201 spinlock_t pool_lock;
202 struct urb *write_urb_pool[NUM_URBS];
203 char busy[NUM_URBS];
204 };
205
206
207 static int debug;
208
209 /*
210 * mos7840_set_reg_sync
211 * To set the Control register by calling usb_fill_control_urb function
212 * by passing usb_sndctrlpipe function as parameter.
213 */
214
215 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
216 __u16 val)
217 {
218 struct usb_device *dev = port->serial->dev;
219 val = val & 0x00ff;
220 dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
221
222 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
223 MCS_WR_RTYPE, val, reg, NULL, 0,
224 MOS_WDR_TIMEOUT);
225 }
226
227 /*
228 * mos7840_get_reg_sync
229 * To set the Uart register by calling usb_fill_control_urb function by
230 * passing usb_rcvctrlpipe function as parameter.
231 */
232
233 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
234 __u16 * val)
235 {
236 struct usb_device *dev = port->serial->dev;
237 int ret = 0;
238
239 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
240 MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH,
241 MOS_WDR_TIMEOUT);
242 dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val);
243 *val = (*val) & 0x00ff;
244 return ret;
245 }
246
247 /*
248 * mos7840_set_uart_reg
249 * To set the Uart register by calling usb_fill_control_urb function by
250 * passing usb_sndctrlpipe function as parameter.
251 */
252
253 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
254 __u16 val)
255 {
256
257 struct usb_device *dev = port->serial->dev;
258 val = val & 0x00ff;
259 // For the UART control registers, the application number need to be Or'ed
260 if (port->serial->num_ports == 4) {
261 val |=
262 (((__u16) port->number - (__u16) (port->serial->minor)) +
263 1) << 8;
264 dbg("mos7840_set_uart_reg application number is %x\n", val);
265 } else {
266 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
267 val |=
268 (((__u16) port->number -
269 (__u16) (port->serial->minor)) + 1) << 8;
270 dbg("mos7840_set_uart_reg application number is %x\n",
271 val);
272 } else {
273 val |=
274 (((__u16) port->number -
275 (__u16) (port->serial->minor)) + 2) << 8;
276 dbg("mos7840_set_uart_reg application number is %x\n",
277 val);
278 }
279 }
280 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
281 MCS_WR_RTYPE, val, reg, NULL, 0,
282 MOS_WDR_TIMEOUT);
283
284 }
285
286 /*
287 * mos7840_get_uart_reg
288 * To set the Control register by calling usb_fill_control_urb function
289 * by passing usb_rcvctrlpipe function as parameter.
290 */
291 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
292 __u16 * val)
293 {
294 struct usb_device *dev = port->serial->dev;
295 int ret = 0;
296 __u16 Wval;
297
298 //dbg("application number is %4x \n",(((__u16)port->number - (__u16)(port->serial->minor))+1)<<8);
299 /*Wval is same as application number */
300 if (port->serial->num_ports == 4) {
301 Wval =
302 (((__u16) port->number - (__u16) (port->serial->minor)) +
303 1) << 8;
304 dbg("mos7840_get_uart_reg application number is %x\n", Wval);
305 } else {
306 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
307 Wval =
308 (((__u16) port->number -
309 (__u16) (port->serial->minor)) + 1) << 8;
310 dbg("mos7840_get_uart_reg application number is %x\n",
311 Wval);
312 } else {
313 Wval =
314 (((__u16) port->number -
315 (__u16) (port->serial->minor)) + 2) << 8;
316 dbg("mos7840_get_uart_reg application number is %x\n",
317 Wval);
318 }
319 }
320 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
321 MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH,
322 MOS_WDR_TIMEOUT);
323 *val = (*val) & 0x00ff;
324 return ret;
325 }
326
327 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
328 {
329
330 dbg("***************************************\n");
331 dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
332 dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset);
333 dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset);
334 dbg("***************************************\n");
335
336 }
337
338 /************************************************************************/
339 /************************************************************************/
340 /* I N T E R F A C E F U N C T I O N S */
341 /* I N T E R F A C E F U N C T I O N S */
342 /************************************************************************/
343 /************************************************************************/
344
345 static inline void mos7840_set_port_private(struct usb_serial_port *port,
346 struct moschip_port *data)
347 {
348 usb_set_serial_port_data(port, (void *)data);
349 }
350
351 static inline struct moschip_port *mos7840_get_port_private(struct
352 usb_serial_port
353 *port)
354 {
355 return (struct moschip_port *)usb_get_serial_port_data(port);
356 }
357
358 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
359 {
360 struct moschip_port *mos7840_port;
361 struct async_icount *icount;
362 mos7840_port = port;
363 icount = &mos7840_port->icount;
364 if (new_msr &
365 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
366 MOS_MSR_DELTA_CD)) {
367 icount = &mos7840_port->icount;
368
369 /* update input line counters */
370 if (new_msr & MOS_MSR_DELTA_CTS) {
371 icount->cts++;
372 smp_wmb();
373 }
374 if (new_msr & MOS_MSR_DELTA_DSR) {
375 icount->dsr++;
376 smp_wmb();
377 }
378 if (new_msr & MOS_MSR_DELTA_CD) {
379 icount->dcd++;
380 smp_wmb();
381 }
382 if (new_msr & MOS_MSR_DELTA_RI) {
383 icount->rng++;
384 smp_wmb();
385 }
386 }
387 }
388
389 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
390 {
391 struct async_icount *icount;
392
393 dbg("%s - %02x", __FUNCTION__, new_lsr);
394
395 if (new_lsr & SERIAL_LSR_BI) {
396 //
397 // Parity and Framing errors only count if they
398 // occur exclusive of a break being
399 // received.
400 //
401 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
402 }
403
404 /* update input line counters */
405 icount = &port->icount;
406 if (new_lsr & SERIAL_LSR_BI) {
407 icount->brk++;
408 smp_wmb();
409 }
410 if (new_lsr & SERIAL_LSR_OE) {
411 icount->overrun++;
412 smp_wmb();
413 }
414 if (new_lsr & SERIAL_LSR_PE) {
415 icount->parity++;
416 smp_wmb();
417 }
418 if (new_lsr & SERIAL_LSR_FE) {
419 icount->frame++;
420 smp_wmb();
421 }
422 }
423
424 /************************************************************************/
425 /************************************************************************/
426 /* U S B C A L L B A C K F U N C T I O N S */
427 /* U S B C A L L B A C K F U N C T I O N S */
428 /************************************************************************/
429 /************************************************************************/
430
431 static void mos7840_control_callback(struct urb *urb)
432 {
433 unsigned char *data;
434 struct moschip_port *mos7840_port;
435 __u8 regval = 0x0;
436 int result = 0;
437
438 if (!urb) {
439 dbg("%s", "Invalid Pointer !!!!:\n");
440 return;
441 }
442
443 mos7840_port = (struct moschip_port *)urb->context;
444
445 switch (urb->status) {
446 case 0:
447 /* success */
448 break;
449 case -ECONNRESET:
450 case -ENOENT:
451 case -ESHUTDOWN:
452 /* this urb is terminated, clean up */
453 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
454 urb->status);
455 return;
456 default:
457 dbg("%s - nonzero urb status received: %d", __FUNCTION__,
458 urb->status);
459 goto exit;
460 }
461
462 dbg("%s urb buffer size is %d\n", __FUNCTION__, urb->actual_length);
463 dbg("%s mos7840_port->MsrLsr is %d port %d\n", __FUNCTION__,
464 mos7840_port->MsrLsr, mos7840_port->port_num);
465 data = urb->transfer_buffer;
466 regval = (__u8) data[0];
467 dbg("%s data is %x\n", __FUNCTION__, regval);
468 if (mos7840_port->MsrLsr == 0)
469 mos7840_handle_new_msr(mos7840_port, regval);
470 else if (mos7840_port->MsrLsr == 1)
471 mos7840_handle_new_lsr(mos7840_port, regval);
472
473 exit:
474 spin_lock(&mos7840_port->pool_lock);
475 if (!mos7840_port->zombie)
476 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
477 spin_unlock(&mos7840_port->pool_lock);
478 if (result) {
479 dev_err(&urb->dev->dev,
480 "%s - Error %d submitting interrupt urb\n",
481 __FUNCTION__, result);
482 }
483 }
484
485 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
486 __u16 * val)
487 {
488 struct usb_device *dev = mcs->port->serial->dev;
489 struct usb_ctrlrequest *dr = mcs->dr;
490 unsigned char *buffer = mcs->ctrl_buf;
491 int ret;
492
493 dr->bRequestType = MCS_RD_RTYPE;
494 dr->bRequest = MCS_RDREQ;
495 dr->wValue = cpu_to_le16(Wval); //0;
496 dr->wIndex = cpu_to_le16(reg);
497 dr->wLength = cpu_to_le16(2);
498
499 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
500 (unsigned char *)dr, buffer, 2,
501 mos7840_control_callback, mcs);
502 mcs->control_urb->transfer_buffer_length = 2;
503 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
504 return ret;
505 }
506
507 /*****************************************************************************
508 * mos7840_interrupt_callback
509 * this is the callback function for when we have received data on the
510 * interrupt endpoint.
511 *****************************************************************************/
512
513 static void mos7840_interrupt_callback(struct urb *urb)
514 {
515 int result;
516 int length;
517 struct moschip_port *mos7840_port;
518 struct usb_serial *serial;
519 __u16 Data;
520 unsigned char *data;
521 __u8 sp[5], st;
522 int i, rv = 0;
523 __u16 wval, wreg = 0;
524
525 dbg("%s", " : Entering\n");
526 if (!urb) {
527 dbg("%s", "Invalid Pointer !!!!:\n");
528 return;
529 }
530
531 switch (urb->status) {
532 case 0:
533 /* success */
534 break;
535 case -ECONNRESET:
536 case -ENOENT:
537 case -ESHUTDOWN:
538 /* this urb is terminated, clean up */
539 dbg("%s - urb shutting down with status: %d", __FUNCTION__,
540 urb->status);
541 return;
542 default:
543 dbg("%s - nonzero urb status received: %d", __FUNCTION__,
544 urb->status);
545 goto exit;
546 }
547
548 length = urb->actual_length;
549 data = urb->transfer_buffer;
550
551 serial = (struct usb_serial *)urb->context;
552
553 /* Moschip get 5 bytes
554 * Byte 1 IIR Port 1 (port.number is 0)
555 * Byte 2 IIR Port 2 (port.number is 1)
556 * Byte 3 IIR Port 3 (port.number is 2)
557 * Byte 4 IIR Port 4 (port.number is 3)
558 * Byte 5 FIFO status for both */
559
560 if (length && length > 5) {
561 dbg("%s \n", "Wrong data !!!");
562 return;
563 }
564
565 sp[0] = (__u8) data[0];
566 sp[1] = (__u8) data[1];
567 sp[2] = (__u8) data[2];
568 sp[3] = (__u8) data[3];
569 st = (__u8) data[4];
570
571 for (i = 0; i < serial->num_ports; i++) {
572 mos7840_port = mos7840_get_port_private(serial->port[i]);
573 wval =
574 (((__u16) serial->port[i]->number -
575 (__u16) (serial->minor)) + 1) << 8;
576 if (mos7840_port->open) {
577 if (sp[i] & 0x01) {
578 dbg("SP%d No Interrupt !!!\n", i);
579 } else {
580 switch (sp[i] & 0x0f) {
581 case SERIAL_IIR_RLS:
582 dbg("Serial Port %d: Receiver status error or ", i);
583 dbg("address bit detected in 9-bit mode\n");
584 mos7840_port->MsrLsr = 1;
585 wreg = LINE_STATUS_REGISTER;
586 break;
587 case SERIAL_IIR_MS:
588 dbg("Serial Port %d: Modem status change\n", i);
589 mos7840_port->MsrLsr = 0;
590 wreg = MODEM_STATUS_REGISTER;
591 break;
592 }
593 spin_lock(&mos7840_port->pool_lock);
594 if (!mos7840_port->zombie) {
595 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
596 } else {
597 spin_unlock(&mos7840_port->pool_lock);
598 return;
599 }
600 spin_unlock(&mos7840_port->pool_lock);
601 }
602 }
603 }
604 if (!(rv < 0)) /* the completion handler for the control urb will resubmit */
605 return;
606 exit:
607 result = usb_submit_urb(urb, GFP_ATOMIC);
608 if (result) {
609 dev_err(&urb->dev->dev,
610 "%s - Error %d submitting interrupt urb\n",
611 __FUNCTION__, result);
612 }
613 }
614
615 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
616 const char *function)
617 {
618 if (!port) {
619 dbg("%s - port == NULL", function);
620 return -1;
621 }
622 if (!port->serial) {
623 dbg("%s - port->serial == NULL", function);
624 return -1;
625 }
626
627 return 0;
628 }
629
630 /* Inline functions to check the sanity of a pointer that is passed to us */
631 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
632 const char *function)
633 {
634 if (!serial) {
635 dbg("%s - serial == NULL", function);
636 return -1;
637 }
638 if (!serial->type) {
639 dbg("%s - serial->type == NULL!", function);
640 return -1;
641 }
642
643 return 0;
644 }
645
646 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
647 const char *function)
648 {
649 /* if no port was specified, or it fails a paranoia check */
650 if (!port ||
651 mos7840_port_paranoia_check(port, function) ||
652 mos7840_serial_paranoia_check(port->serial, function)) {
653 /* then say that we don't have a valid usb_serial thing, which will
654 * end up genrating -ENODEV return values */
655 return NULL;
656 }
657
658 return port->serial;
659 }
660
661 /*****************************************************************************
662 * mos7840_bulk_in_callback
663 * this is the callback function for when we have received data on the
664 * bulk in endpoint.
665 *****************************************************************************/
666
667 static void mos7840_bulk_in_callback(struct urb *urb)
668 {
669 int status;
670 unsigned char *data;
671 struct usb_serial *serial;
672 struct usb_serial_port *port;
673 struct moschip_port *mos7840_port;
674 struct tty_struct *tty;
675
676 if (!urb) {
677 dbg("%s", "Invalid Pointer !!!!:\n");
678 return;
679 }
680
681 if (urb->status) {
682 dbg("nonzero read bulk status received: %d", urb->status);
683 return;
684 }
685
686 mos7840_port = (struct moschip_port *)urb->context;
687 if (!mos7840_port) {
688 dbg("%s", "NULL mos7840_port pointer \n");
689 return;
690 }
691
692 port = (struct usb_serial_port *)mos7840_port->port;
693 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
694 dbg("%s", "Port Paranoia failed \n");
695 return;
696 }
697
698 serial = mos7840_get_usb_serial(port, __FUNCTION__);
699 if (!serial) {
700 dbg("%s\n", "Bad serial pointer ");
701 return;
702 }
703
704 dbg("%s\n", "Entering... \n");
705
706 data = urb->transfer_buffer;
707
708 dbg("%s", "Entering ........... \n");
709
710 if (urb->actual_length) {
711 tty = mos7840_port->port->tty;
712 if (tty) {
713 tty_buffer_request_room(tty, urb->actual_length);
714 tty_insert_flip_string(tty, data, urb->actual_length);
715 dbg(" %s \n", data);
716 tty_flip_buffer_push(tty);
717 }
718 mos7840_port->icount.rx += urb->actual_length;
719 smp_wmb();
720 dbg("mos7840_port->icount.rx is %d:\n",
721 mos7840_port->icount.rx);
722 }
723
724 if (!mos7840_port->read_urb) {
725 dbg("%s", "URB KILLED !!!\n");
726 return;
727 }
728
729
730 mos7840_port->read_urb->dev = serial->dev;
731
732 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
733
734 if (status) {
735 dbg(" usb_submit_urb(read bulk) failed, status = %d",
736 status);
737 }
738 }
739
740 /*****************************************************************************
741 * mos7840_bulk_out_data_callback
742 * this is the callback function for when we have finished sending serial data
743 * on the bulk out endpoint.
744 *****************************************************************************/
745
746 static void mos7840_bulk_out_data_callback(struct urb *urb)
747 {
748 struct moschip_port *mos7840_port;
749 struct tty_struct *tty;
750 int i;
751
752 if (!urb) {
753 dbg("%s", "Invalid Pointer !!!!:\n");
754 return;
755 }
756
757 mos7840_port = (struct moschip_port *)urb->context;
758 spin_lock(&mos7840_port->pool_lock);
759 for (i = 0; i < NUM_URBS; i++) {
760 if (urb == mos7840_port->write_urb_pool[i]) {
761 mos7840_port->busy[i] = 0;
762 break;
763 }
764 }
765 spin_unlock(&mos7840_port->pool_lock);
766
767 if (urb->status) {
768 dbg("nonzero write bulk status received:%d\n", urb->status);
769 return;
770 }
771
772 if (!mos7840_port) {
773 dbg("%s", "NULL mos7840_port pointer \n");
774 return;
775 }
776
777 if (mos7840_port_paranoia_check(mos7840_port->port, __FUNCTION__)) {
778 dbg("%s", "Port Paranoia failed \n");
779 return;
780 }
781
782 dbg("%s \n", "Entering .........");
783
784 tty = mos7840_port->port->tty;
785
786 if (tty && mos7840_port->open)
787 tty_wakeup(tty);
788
789 }
790
791 /************************************************************************/
792 /* 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 */
793 /************************************************************************/
794 #ifdef MCSSerialProbe
795 static int mos7840_serial_probe(struct usb_serial *serial,
796 const struct usb_device_id *id)
797 {
798
799 /*need to implement the mode_reg reading and updating\
800 structures usb_serial_ device_type\
801 (i.e num_ports, num_bulkin,bulkout etc) */
802 /* Also we can update the changes attach */
803 return 1;
804 }
805 #endif
806
807 /*****************************************************************************
808 * mos7840_open
809 * this function is called by the tty driver when a port is opened
810 * If successful, we return 0
811 * Otherwise we return a negative error number.
812 *****************************************************************************/
813
814 static int mos7840_open(struct usb_serial_port *port, struct file *filp)
815 {
816 int response;
817 int j;
818 struct usb_serial *serial;
819 struct urb *urb;
820 __u16 Data;
821 int status;
822 struct moschip_port *mos7840_port;
823 struct moschip_port *port0;
824
825 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
826 dbg("%s", "Port Paranoia failed \n");
827 return -ENODEV;
828 }
829
830 serial = port->serial;
831
832 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
833 dbg("%s", "Serial Paranoia failed \n");
834 return -ENODEV;
835 }
836
837 mos7840_port = mos7840_get_port_private(port);
838 port0 = mos7840_get_port_private(serial->port[0]);
839
840 if (mos7840_port == NULL || port0 == NULL)
841 return -ENODEV;
842
843 usb_clear_halt(serial->dev, port->write_urb->pipe);
844 usb_clear_halt(serial->dev, port->read_urb->pipe);
845 port0->open_ports++;
846
847 /* Initialising the write urb pool */
848 for (j = 0; j < NUM_URBS; ++j) {
849 urb = usb_alloc_urb(0, GFP_KERNEL);
850 mos7840_port->write_urb_pool[j] = urb;
851
852 if (urb == NULL) {
853 err("No more urbs???");
854 continue;
855 }
856
857 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
858 if (!urb->transfer_buffer) {
859 usb_free_urb(urb);
860 mos7840_port->write_urb_pool[j] = NULL;
861 err("%s-out of memory for urb buffers.", __FUNCTION__);
862 continue;
863 }
864 }
865
866 /*****************************************************************************
867 * Initialize MCS7840 -- Write Init values to corresponding Registers
868 *
869 * Register Index
870 * 1 : IER
871 * 2 : FCR
872 * 3 : LCR
873 * 4 : MCR
874 *
875 * 0x08 : SP1/2 Control Reg
876 *****************************************************************************/
877
878 //NEED to check the following Block
879
880 status = 0;
881 Data = 0x0;
882 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
883 if (status < 0) {
884 dbg("Reading Spreg failed\n");
885 return -1;
886 }
887 Data |= 0x80;
888 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
889 if (status < 0) {
890 dbg("writing Spreg failed\n");
891 return -1;
892 }
893
894 Data &= ~0x80;
895 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
896 if (status < 0) {
897 dbg("writing Spreg failed\n");
898 return -1;
899 }
900 //End of block to be checked
901
902 status = 0;
903 Data = 0x0;
904 status =
905 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
906 if (status < 0) {
907 dbg("Reading Controlreg failed\n");
908 return -1;
909 }
910 Data |= 0x08; //Driver done bit
911 Data |= 0x20; //rx_disable
912 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
913 if (status < 0) {
914 dbg("writing Controlreg failed\n");
915 return -1;
916 }
917 //do register settings here
918 // Set all regs to the device default values.
919 ////////////////////////////////////
920 // First Disable all interrupts.
921 ////////////////////////////////////
922
923 Data = 0x00;
924 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
925 if (status < 0) {
926 dbg("disableing interrupts failed\n");
927 return -1;
928 }
929 // Set FIFO_CONTROL_REGISTER to the default value
930 Data = 0x00;
931 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
932 if (status < 0) {
933 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
934 return -1;
935 }
936
937 Data = 0xcf;
938 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
939 if (status < 0) {
940 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
941 return -1;
942 }
943
944 Data = 0x03;
945 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
946 mos7840_port->shadowLCR = Data;
947
948 Data = 0x0b;
949 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
950 mos7840_port->shadowMCR = Data;
951
952 Data = 0x00;
953 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
954 mos7840_port->shadowLCR = Data;
955
956 Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80
957 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
958
959 Data = 0x0c;
960 status = 0;
961 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
962
963 Data = 0x0;
964 status = 0;
965 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
966
967 Data = 0x00;
968 status = 0;
969 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
970
971 Data = Data & ~SERIAL_LCR_DLAB;
972 status = 0;
973 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
974 mos7840_port->shadowLCR = Data;
975
976 //clearing Bulkin and Bulkout Fifo
977 Data = 0x0;
978 status = 0;
979 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
980
981 Data = Data | 0x0c;
982 status = 0;
983 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
984
985 Data = Data & ~0x0c;
986 status = 0;
987 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
988 //Finally enable all interrupts
989 Data = 0x0;
990 Data = 0x0c;
991 status = 0;
992 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
993
994 //clearing rx_disable
995 Data = 0x0;
996 status = 0;
997 status =
998 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
999 Data = Data & ~0x20;
1000 status = 0;
1001 status =
1002 mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
1003
1004 // rx_negate
1005 Data = 0x0;
1006 status = 0;
1007 status =
1008 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
1009 Data = Data | 0x10;
1010 status = 0;
1011 status =
1012 mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
1013
1014 /* force low_latency on so that our tty_push actually forces *
1015 * the data through,otherwise it is scheduled, and with *
1016 * high data rates (like with OHCI) data can get lost. */
1017
1018 if (port->tty)
1019 port->tty->low_latency = 1;
1020 /* Check to see if we've set up our endpoint info yet *
1021 * (can't set it up in mos7840_startup as the structures *
1022 * were not set up at that time.) */
1023 if (port0->open_ports == 1) {
1024 if (serial->port[0]->interrupt_in_buffer == NULL) {
1025
1026 /* set up interrupt urb */
1027
1028 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1029 serial->dev,
1030 usb_rcvintpipe(serial->dev,
1031 serial->port[0]->
1032 interrupt_in_endpointAddress),
1033 serial->port[0]->interrupt_in_buffer,
1034 serial->port[0]->interrupt_in_urb->
1035 transfer_buffer_length,
1036 mos7840_interrupt_callback,
1037 serial,
1038 serial->port[0]->interrupt_in_urb->
1039 interval);
1040
1041 /* start interrupt read for mos7840 *
1042 * will continue as long as mos7840 is connected */
1043
1044 response =
1045 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1046 GFP_KERNEL);
1047 if (response) {
1048 err("%s - Error %d submitting interrupt urb",
1049 __FUNCTION__, response);
1050 }
1051
1052 }
1053
1054 }
1055
1056 /* see if we've set up our endpoint info yet *
1057 * (can't set it up in mos7840_startup as the *
1058 * structures were not set up at that time.) */
1059
1060 dbg("port number is %d \n", port->number);
1061 dbg("serial number is %d \n", port->serial->minor);
1062 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress);
1063 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress);
1064 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress);
1065 dbg("port's number in the device is %d\n", mos7840_port->port_num);
1066 mos7840_port->read_urb = port->read_urb;
1067
1068 /* set up our bulk in urb */
1069
1070 usb_fill_bulk_urb(mos7840_port->read_urb,
1071 serial->dev,
1072 usb_rcvbulkpipe(serial->dev,
1073 port->bulk_in_endpointAddress),
1074 port->bulk_in_buffer,
1075 mos7840_port->read_urb->transfer_buffer_length,
1076 mos7840_bulk_in_callback, mos7840_port);
1077
1078 dbg("mos7840_open: bulkin endpoint is %d\n",
1079 port->bulk_in_endpointAddress);
1080 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1081 if (response) {
1082 err("%s - Error %d submitting control urb", __FUNCTION__,
1083 response);
1084 }
1085
1086 /* initialize our wait queues */
1087 init_waitqueue_head(&mos7840_port->wait_chase);
1088 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1089
1090 /* initialize our icount structure */
1091 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1092
1093 /* initialize our port settings */
1094 mos7840_port->shadowMCR = MCR_MASTER_IE; /* Must set to enable ints! */
1095 /* send a open port command */
1096 mos7840_port->open = 1;
1097 //mos7840_change_port_settings(mos7840_port,old_termios);
1098 mos7840_port->icount.tx = 0;
1099 mos7840_port->icount.rx = 0;
1100
1101 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n", serial, mos7840_port, port);
1102
1103 return 0;
1104
1105 }
1106
1107 /*****************************************************************************
1108 * mos7840_chars_in_buffer
1109 * this function is called by the tty driver when it wants to know how many
1110 * bytes of data we currently have outstanding in the port (data that has
1111 * been written, but hasn't made it out the port yet)
1112 * If successful, we return the number of bytes left to be written in the
1113 * system,
1114 * Otherwise we return a negative error number.
1115 *****************************************************************************/
1116
1117 static int mos7840_chars_in_buffer(struct usb_serial_port *port)
1118 {
1119 int i;
1120 int chars = 0;
1121 unsigned long flags;
1122 struct moschip_port *mos7840_port;
1123
1124 dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
1125
1126 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1127 dbg("%s", "Invalid port \n");
1128 return -1;
1129 }
1130
1131 mos7840_port = mos7840_get_port_private(port);
1132 if (mos7840_port == NULL) {
1133 dbg("%s \n", "mos7840_break:leaving ...........");
1134 return -1;
1135 }
1136
1137 spin_lock_irqsave(&mos7840_port->pool_lock,flags);
1138 for (i = 0; i < NUM_URBS; ++i) {
1139 if (mos7840_port->busy[i]) {
1140 chars += URB_TRANSFER_BUFFER_SIZE;
1141 }
1142 }
1143 spin_unlock_irqrestore(&mos7840_port->pool_lock,flags);
1144 dbg("%s - returns %d", __FUNCTION__, chars);
1145 return chars;
1146
1147 }
1148
1149 /************************************************************************
1150 *
1151 * mos7840_block_until_tx_empty
1152 *
1153 * This function will block the close until one of the following:
1154 * 1. TX count are 0
1155 * 2. The mos7840 has stopped
1156 * 3. A timout of 3 seconds without activity has expired
1157 *
1158 ************************************************************************/
1159 static void mos7840_block_until_tx_empty(struct moschip_port *mos7840_port)
1160 {
1161 int timeout = HZ / 10;
1162 int wait = 30;
1163 int count;
1164
1165 while (1) {
1166
1167 count = mos7840_chars_in_buffer(mos7840_port->port);
1168
1169 /* Check for Buffer status */
1170 if (count <= 0) {
1171 return;
1172 }
1173
1174 /* Block the thread for a while */
1175 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1176 timeout);
1177
1178 /* No activity.. count down section */
1179 wait--;
1180 if (wait == 0) {
1181 dbg("%s - TIMEOUT", __FUNCTION__);
1182 return;
1183 } else {
1184 /* Reset timout value back to seconds */
1185 wait = 30;
1186 }
1187 }
1188 }
1189
1190 /*****************************************************************************
1191 * mos7840_close
1192 * this function is called by the tty driver when a port is closed
1193 *****************************************************************************/
1194
1195 static void mos7840_close(struct usb_serial_port *port, struct file *filp)
1196 {
1197 struct usb_serial *serial;
1198 struct moschip_port *mos7840_port;
1199 struct moschip_port *port0;
1200 int j;
1201 __u16 Data;
1202
1203 dbg("%s\n", "mos7840_close:entering...");
1204
1205 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1206 dbg("%s", "Port Paranoia failed \n");
1207 return;
1208 }
1209
1210 serial = mos7840_get_usb_serial(port, __FUNCTION__);
1211 if (!serial) {
1212 dbg("%s", "Serial Paranoia failed \n");
1213 return;
1214 }
1215
1216 mos7840_port = mos7840_get_port_private(port);
1217 port0 = mos7840_get_port_private(serial->port[0]);
1218
1219 if (mos7840_port == NULL || port0 == NULL)
1220 return;
1221
1222 for (j = 0; j < NUM_URBS; ++j)
1223 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1224
1225 /* Freeing Write URBs */
1226 for (j = 0; j < NUM_URBS; ++j) {
1227 if (mos7840_port->write_urb_pool[j]) {
1228 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1229 kfree(mos7840_port->write_urb_pool[j]->
1230 transfer_buffer);
1231
1232 usb_free_urb(mos7840_port->write_urb_pool[j]);
1233 }
1234 }
1235
1236 if (serial->dev) {
1237 /* flush and block until tx is empty */
1238 mos7840_block_until_tx_empty(mos7840_port);
1239 }
1240
1241 /* While closing port, shutdown all bulk read, write *
1242 * and interrupt read if they exists */
1243 if (serial->dev) {
1244
1245 if (mos7840_port->write_urb) {
1246 dbg("%s", "Shutdown bulk write\n");
1247 usb_kill_urb(mos7840_port->write_urb);
1248 }
1249
1250 if (mos7840_port->read_urb) {
1251 dbg("%s", "Shutdown bulk read\n");
1252 usb_kill_urb(mos7840_port->read_urb);
1253 }
1254 if ((&mos7840_port->control_urb)) {
1255 dbg("%s", "Shutdown control read\n");
1256 // usb_kill_urb (mos7840_port->control_urb);
1257
1258 }
1259 }
1260 // if(mos7840_port->ctrl_buf != NULL)
1261 // kfree(mos7840_port->ctrl_buf);
1262 port0->open_ports--;
1263 dbg("mos7840_num_open_ports in close%d:in port%d\n",
1264 port0->open_ports, port->number);
1265 if (port0->open_ports == 0) {
1266 if (serial->port[0]->interrupt_in_urb) {
1267 dbg("%s", "Shutdown interrupt_in_urb\n");
1268 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1269 }
1270 }
1271
1272 if (mos7840_port->write_urb) {
1273 /* if this urb had a transfer buffer already (old tx) free it */
1274
1275 if (mos7840_port->write_urb->transfer_buffer != NULL) {
1276 kfree(mos7840_port->write_urb->transfer_buffer);
1277 }
1278 usb_free_urb(mos7840_port->write_urb);
1279 }
1280
1281 Data = 0x0;
1282 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1283
1284 Data = 0x00;
1285 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1286
1287 mos7840_port->open = 0;
1288
1289 dbg("%s \n", "Leaving ............");
1290 }
1291
1292 /************************************************************************
1293 *
1294 * mos7840_block_until_chase_response
1295 *
1296 * This function will block the close until one of the following:
1297 * 1. Response to our Chase comes from mos7840
1298 * 2. A timout of 10 seconds without activity has expired
1299 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1300 *
1301 ************************************************************************/
1302
1303 static void mos7840_block_until_chase_response(struct moschip_port
1304 *mos7840_port)
1305 {
1306 int timeout = 1 * HZ;
1307 int wait = 10;
1308 int count;
1309
1310 while (1) {
1311 count = mos7840_chars_in_buffer(mos7840_port->port);
1312
1313 /* Check for Buffer status */
1314 if (count <= 0) {
1315 return;
1316 }
1317
1318 /* Block the thread for a while */
1319 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1320 timeout);
1321 /* No activity.. count down section */
1322 wait--;
1323 if (wait == 0) {
1324 dbg("%s - TIMEOUT", __FUNCTION__);
1325 return;
1326 } else {
1327 /* Reset timout value back to seconds */
1328 wait = 10;
1329 }
1330 }
1331
1332 }
1333
1334 /*****************************************************************************
1335 * mos7840_break
1336 * this function sends a break to the port
1337 *****************************************************************************/
1338 static void mos7840_break(struct usb_serial_port *port, int break_state)
1339 {
1340 unsigned char data;
1341 struct usb_serial *serial;
1342 struct moschip_port *mos7840_port;
1343
1344 dbg("%s \n", "Entering ...........");
1345 dbg("mos7840_break: Start\n");
1346
1347 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1348 dbg("%s", "Port Paranoia failed \n");
1349 return;
1350 }
1351
1352 serial = mos7840_get_usb_serial(port, __FUNCTION__);
1353 if (!serial) {
1354 dbg("%s", "Serial Paranoia failed \n");
1355 return;
1356 }
1357
1358 mos7840_port = mos7840_get_port_private(port);
1359
1360 if (mos7840_port == NULL) {
1361 return;
1362 }
1363
1364 if (serial->dev) {
1365
1366 /* flush and block until tx is empty */
1367 mos7840_block_until_chase_response(mos7840_port);
1368 }
1369
1370 if (break_state == -1) {
1371 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1372 } else {
1373 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1374 }
1375
1376 mos7840_port->shadowLCR = data;
1377 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
1378 mos7840_port->shadowLCR);
1379 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1380 mos7840_port->shadowLCR);
1381
1382 return;
1383 }
1384
1385 /*****************************************************************************
1386 * mos7840_write_room
1387 * this function is called by the tty driver when it wants to know how many
1388 * bytes of data we can accept for a specific port.
1389 * If successful, we return the amount of room that we have for this port
1390 * Otherwise we return a negative error number.
1391 *****************************************************************************/
1392
1393 static int mos7840_write_room(struct usb_serial_port *port)
1394 {
1395 int i;
1396 int room = 0;
1397 unsigned long flags;
1398 struct moschip_port *mos7840_port;
1399
1400 dbg("%s \n", " mos7840_write_room:entering ...........");
1401
1402 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1403 dbg("%s", "Invalid port \n");
1404 dbg("%s \n", " mos7840_write_room:leaving ...........");
1405 return -1;
1406 }
1407
1408 mos7840_port = mos7840_get_port_private(port);
1409 if (mos7840_port == NULL) {
1410 dbg("%s \n", "mos7840_break:leaving ...........");
1411 return -1;
1412 }
1413
1414 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1415 for (i = 0; i < NUM_URBS; ++i) {
1416 if (!mos7840_port->busy[i]) {
1417 room += URB_TRANSFER_BUFFER_SIZE;
1418 }
1419 }
1420 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1421
1422 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1423 dbg("%s - returns %d", __FUNCTION__, room);
1424 return room;
1425
1426 }
1427
1428 /*****************************************************************************
1429 * mos7840_write
1430 * this function is called by the tty driver when data should be written to
1431 * the port.
1432 * If successful, we return the number of bytes written, otherwise we
1433 * return a negative error number.
1434 *****************************************************************************/
1435
1436 static int mos7840_write(struct usb_serial_port *port,
1437 const unsigned char *data, int count)
1438 {
1439 int status;
1440 int i;
1441 int bytes_sent = 0;
1442 int transfer_size;
1443 unsigned long flags;
1444
1445 struct moschip_port *mos7840_port;
1446 struct usb_serial *serial;
1447 struct urb *urb;
1448 //__u16 Data;
1449 const unsigned char *current_position = data;
1450 unsigned char *data1;
1451 dbg("%s \n", "entering ...........");
1452 //dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",mos7840_port->shadowLCR);
1453
1454 #ifdef NOTMOS7840
1455 Data = 0x00;
1456 status = 0;
1457 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1458 mos7840_port->shadowLCR = Data;
1459 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
1460 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1461 mos7840_port->shadowLCR);
1462
1463 //Data = 0x03;
1464 //status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data);
1465 //mos7840_port->shadowLCR=Data;//Need to add later
1466
1467 Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80
1468 status = 0;
1469 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1470
1471 //Data = 0x0c;
1472 //status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data);
1473 Data = 0x00;
1474 status = 0;
1475 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1476 dbg("mos7840_write:DLL value is %x\n", Data);
1477
1478 Data = 0x0;
1479 status = 0;
1480 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1481 dbg("mos7840_write:DLM value is %x\n", Data);
1482
1483 Data = Data & ~SERIAL_LCR_DLAB;
1484 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1485 mos7840_port->shadowLCR);
1486 status = 0;
1487 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1488 #endif
1489
1490 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1491 dbg("%s", "Port Paranoia failed \n");
1492 return -1;
1493 }
1494
1495 serial = port->serial;
1496 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
1497 dbg("%s", "Serial Paranoia failed \n");
1498 return -1;
1499 }
1500
1501 mos7840_port = mos7840_get_port_private(port);
1502 if (mos7840_port == NULL) {
1503 dbg("%s", "mos7840_port is NULL\n");
1504 return -1;
1505 }
1506
1507 /* try to find a free urb in the list */
1508 urb = NULL;
1509
1510 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1511 for (i = 0; i < NUM_URBS; ++i) {
1512 if (!mos7840_port->busy[i]) {
1513 mos7840_port->busy[i] = 1;
1514 urb = mos7840_port->write_urb_pool[i];
1515 dbg("\nURB:%d", i);
1516 break;
1517 }
1518 }
1519 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1520
1521 if (urb == NULL) {
1522 dbg("%s - no more free urbs", __FUNCTION__);
1523 goto exit;
1524 }
1525
1526 if (urb->transfer_buffer == NULL) {
1527 urb->transfer_buffer =
1528 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1529
1530 if (urb->transfer_buffer == NULL) {
1531 err("%s no more kernel memory...", __FUNCTION__);
1532 goto exit;
1533 }
1534 }
1535 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1536
1537 memcpy(urb->transfer_buffer, current_position, transfer_size);
1538
1539 /* fill urb with data and submit */
1540 usb_fill_bulk_urb(urb,
1541 serial->dev,
1542 usb_sndbulkpipe(serial->dev,
1543 port->bulk_out_endpointAddress),
1544 urb->transfer_buffer,
1545 transfer_size,
1546 mos7840_bulk_out_data_callback, mos7840_port);
1547
1548 data1 = urb->transfer_buffer;
1549 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress);
1550
1551 /* send it down the pipe */
1552 status = usb_submit_urb(urb, GFP_ATOMIC);
1553
1554 if (status) {
1555 mos7840_port->busy[i] = 0;
1556 err("%s - usb_submit_urb(write bulk) failed with status = %d",
1557 __FUNCTION__, status);
1558 bytes_sent = status;
1559 goto exit;
1560 }
1561 bytes_sent = transfer_size;
1562 mos7840_port->icount.tx += transfer_size;
1563 smp_wmb();
1564 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
1565 exit:
1566
1567 return bytes_sent;
1568
1569 }
1570
1571 /*****************************************************************************
1572 * mos7840_throttle
1573 * this function is called by the tty driver when it wants to stop the data
1574 * being read from the port.
1575 *****************************************************************************/
1576
1577 static void mos7840_throttle(struct usb_serial_port *port)
1578 {
1579 struct moschip_port *mos7840_port;
1580 struct tty_struct *tty;
1581 int status;
1582
1583 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1584 dbg("%s", "Invalid port \n");
1585 return;
1586 }
1587
1588 dbg("- port %d\n", port->number);
1589
1590 mos7840_port = mos7840_get_port_private(port);
1591
1592 if (mos7840_port == NULL)
1593 return;
1594
1595 if (!mos7840_port->open) {
1596 dbg("%s\n", "port not opened");
1597 return;
1598 }
1599
1600 dbg("%s", "Entering .......... \n");
1601
1602 tty = port->tty;
1603 if (!tty) {
1604 dbg("%s - no tty available", __FUNCTION__);
1605 return;
1606 }
1607
1608 /* if we are implementing XON/XOFF, send the stop character */
1609 if (I_IXOFF(tty)) {
1610 unsigned char stop_char = STOP_CHAR(tty);
1611 status = mos7840_write(port, &stop_char, 1);
1612 if (status <= 0) {
1613 return;
1614 }
1615 }
1616
1617 /* if we are implementing RTS/CTS, toggle that line */
1618 if (tty->termios->c_cflag & CRTSCTS) {
1619 mos7840_port->shadowMCR &= ~MCR_RTS;
1620 status = 0;
1621 status =
1622 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1623 mos7840_port->shadowMCR);
1624
1625 if (status < 0) {
1626 return;
1627 }
1628 }
1629
1630 return;
1631 }
1632
1633 /*****************************************************************************
1634 * mos7840_unthrottle
1635 * this function is called by the tty driver when it wants to resume the data
1636 * being read from the port (called after SerialThrottle is called)
1637 *****************************************************************************/
1638 static void mos7840_unthrottle(struct usb_serial_port *port)
1639 {
1640 struct tty_struct *tty;
1641 int status;
1642 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1643
1644 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1645 dbg("%s", "Invalid port \n");
1646 return;
1647 }
1648
1649 if (mos7840_port == NULL)
1650 return;
1651
1652 if (!mos7840_port->open) {
1653 dbg("%s - port not opened", __FUNCTION__);
1654 return;
1655 }
1656
1657 dbg("%s", "Entering .......... \n");
1658
1659 tty = port->tty;
1660 if (!tty) {
1661 dbg("%s - no tty available", __FUNCTION__);
1662 return;
1663 }
1664
1665 /* if we are implementing XON/XOFF, send the start character */
1666 if (I_IXOFF(tty)) {
1667 unsigned char start_char = START_CHAR(tty);
1668 status = mos7840_write(port, &start_char, 1);
1669 if (status <= 0) {
1670 return;
1671 }
1672 }
1673
1674 /* if we are implementing RTS/CTS, toggle that line */
1675 if (tty->termios->c_cflag & CRTSCTS) {
1676 mos7840_port->shadowMCR |= MCR_RTS;
1677 status = 0;
1678 status =
1679 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1680 mos7840_port->shadowMCR);
1681 if (status < 0) {
1682 return;
1683 }
1684 }
1685
1686 return;
1687 }
1688
1689 static int mos7840_tiocmget(struct usb_serial_port *port, struct file *file)
1690 {
1691 struct moschip_port *mos7840_port;
1692 unsigned int result;
1693 __u16 msr;
1694 __u16 mcr;
1695 int status = 0;
1696 mos7840_port = mos7840_get_port_private(port);
1697
1698 dbg("%s - port %d", __FUNCTION__, port->number);
1699
1700 if (mos7840_port == NULL)
1701 return -ENODEV;
1702
1703 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1704 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1705 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1706 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1707 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1708 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1709 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1710 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1711 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1712
1713 dbg("%s - 0x%04X", __FUNCTION__, result);
1714
1715 return result;
1716 }
1717
1718 static int mos7840_tiocmset(struct usb_serial_port *port, struct file *file,
1719 unsigned int set, unsigned int clear)
1720 {
1721 struct moschip_port *mos7840_port;
1722 unsigned int mcr;
1723 unsigned int status;
1724
1725 dbg("%s - port %d", __FUNCTION__, port->number);
1726
1727 mos7840_port = mos7840_get_port_private(port);
1728
1729 if (mos7840_port == NULL)
1730 return -ENODEV;
1731
1732 mcr = mos7840_port->shadowMCR;
1733 if (clear & TIOCM_RTS)
1734 mcr &= ~MCR_RTS;
1735 if (clear & TIOCM_DTR)
1736 mcr &= ~MCR_DTR;
1737 if (clear & TIOCM_LOOP)
1738 mcr &= ~MCR_LOOPBACK;
1739
1740 if (set & TIOCM_RTS)
1741 mcr |= MCR_RTS;
1742 if (set & TIOCM_DTR)
1743 mcr |= MCR_DTR;
1744 if (set & TIOCM_LOOP)
1745 mcr |= MCR_LOOPBACK;
1746
1747 mos7840_port->shadowMCR = mcr;
1748
1749 status = 0;
1750 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1751 if (status < 0) {
1752 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
1753 return -1;
1754 }
1755
1756 return 0;
1757 }
1758
1759 /*****************************************************************************
1760 * mos7840_calc_baud_rate_divisor
1761 * this function calculates the proper baud rate divisor for the specified
1762 * baud rate.
1763 *****************************************************************************/
1764 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1765 __u16 * clk_sel_val)
1766 {
1767
1768 dbg("%s - %d", __FUNCTION__, baudRate);
1769
1770 if (baudRate <= 115200) {
1771 *divisor = 115200 / baudRate;
1772 *clk_sel_val = 0x0;
1773 }
1774 if ((baudRate > 115200) && (baudRate <= 230400)) {
1775 *divisor = 230400 / baudRate;
1776 *clk_sel_val = 0x10;
1777 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1778 *divisor = 403200 / baudRate;
1779 *clk_sel_val = 0x20;
1780 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1781 *divisor = 460800 / baudRate;
1782 *clk_sel_val = 0x30;
1783 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1784 *divisor = 806400 / baudRate;
1785 *clk_sel_val = 0x40;
1786 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1787 *divisor = 921600 / baudRate;
1788 *clk_sel_val = 0x50;
1789 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1790 *divisor = 1572864 / baudRate;
1791 *clk_sel_val = 0x60;
1792 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1793 *divisor = 3145728 / baudRate;
1794 *clk_sel_val = 0x70;
1795 }
1796 return 0;
1797
1798 #ifdef NOTMCS7840
1799
1800 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1801 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1802 *divisor = mos7840_divisor_table[i].Divisor;
1803 return 0;
1804 }
1805 }
1806
1807 /* After trying for all the standard baud rates *
1808 * Try calculating the divisor for this baud rate */
1809
1810 if (baudrate > 75 && baudrate < 230400) {
1811 /* get the divisor */
1812 custom = (__u16) (230400L / baudrate);
1813
1814 /* Check for round off */
1815 round1 = (__u16) (2304000L / baudrate);
1816 round = (__u16) (round1 - (custom * 10));
1817 if (round > 4) {
1818 custom++;
1819 }
1820 *divisor = custom;
1821
1822 dbg(" Baud %d = %d\n", baudrate, custom);
1823 return 0;
1824 }
1825
1826 dbg("%s\n", " Baud calculation Failed...");
1827 return -1;
1828 #endif
1829 }
1830
1831 /*****************************************************************************
1832 * mos7840_send_cmd_write_baud_rate
1833 * this function sends the proper command to change the baud rate of the
1834 * specified port.
1835 *****************************************************************************/
1836
1837 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1838 int baudRate)
1839 {
1840 int divisor = 0;
1841 int status;
1842 __u16 Data;
1843 unsigned char number;
1844 __u16 clk_sel_val;
1845 struct usb_serial_port *port;
1846
1847 if (mos7840_port == NULL)
1848 return -1;
1849
1850 port = (struct usb_serial_port *)mos7840_port->port;
1851 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1852 dbg("%s", "Invalid port \n");
1853 return -1;
1854 }
1855
1856 if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) {
1857 dbg("%s", "Invalid Serial \n");
1858 return -1;
1859 }
1860
1861 dbg("%s", "Entering .......... \n");
1862
1863 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1864
1865 dbg("%s - port = %d, baud = %d", __FUNCTION__,
1866 mos7840_port->port->number, baudRate);
1867 //reset clk_uart_sel in spregOffset
1868 if (baudRate > 115200) {
1869 #ifdef HW_flow_control
1870 //NOTE: need to see the pther register to modify
1871 //setting h/w flow control bit to 1;
1872 status = 0;
1873 Data = 0x2b;
1874 mos7840_port->shadowMCR = Data;
1875 status =
1876 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1877 if (status < 0) {
1878 dbg("Writing spreg failed in set_serial_baud\n");
1879 return -1;
1880 }
1881 #endif
1882
1883 } else {
1884 #ifdef HW_flow_control
1885 //setting h/w flow control bit to 0;
1886 status = 0;
1887 Data = 0xb;
1888 mos7840_port->shadowMCR = Data;
1889 status =
1890 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1891 if (status < 0) {
1892 dbg("Writing spreg failed in set_serial_baud\n");
1893 return -1;
1894 }
1895 #endif
1896
1897 }
1898
1899 if (1) //baudRate <= 115200)
1900 {
1901 clk_sel_val = 0x0;
1902 Data = 0x0;
1903 status = 0;
1904 status =
1905 mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1906 &clk_sel_val);
1907 status =
1908 mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1909 &Data);
1910 if (status < 0) {
1911 dbg("reading spreg failed in set_serial_baud\n");
1912 return -1;
1913 }
1914 Data = (Data & 0x8f) | clk_sel_val;
1915 status = 0;
1916 status =
1917 mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1918 if (status < 0) {
1919 dbg("Writing spreg failed in set_serial_baud\n");
1920 return -1;
1921 }
1922 /* Calculate the Divisor */
1923
1924 if (status) {
1925 err("%s - bad baud rate", __FUNCTION__);
1926 dbg("%s\n", "bad baud rate");
1927 return status;
1928 }
1929 /* Enable access to divisor latch */
1930 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1931 mos7840_port->shadowLCR = Data;
1932 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1933
1934 /* Write the divisor */
1935 Data = (unsigned char)(divisor & 0xff);
1936 dbg("set_serial_baud Value to write DLL is %x\n", Data);
1937 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1938
1939 Data = (unsigned char)((divisor & 0xff00) >> 8);
1940 dbg("set_serial_baud Value to write DLM is %x\n", Data);
1941 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1942
1943 /* Disable access to divisor latch */
1944 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1945 mos7840_port->shadowLCR = Data;
1946 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1947
1948 }
1949
1950 return status;
1951 }
1952
1953 /*****************************************************************************
1954 * mos7840_change_port_settings
1955 * This routine is called to set the UART on the device to match
1956 * the specified new settings.
1957 *****************************************************************************/
1958
1959 static void mos7840_change_port_settings(struct moschip_port *mos7840_port,
1960 struct ktermios *old_termios)
1961 {
1962 struct tty_struct *tty;
1963 int baud;
1964 unsigned cflag;
1965 unsigned iflag;
1966 __u8 lData;
1967 __u8 lParity;
1968 __u8 lStop;
1969 int status;
1970 __u16 Data;
1971 struct usb_serial_port *port;
1972 struct usb_serial *serial;
1973
1974 if (mos7840_port == NULL)
1975 return;
1976
1977 port = (struct usb_serial_port *)mos7840_port->port;
1978
1979 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
1980 dbg("%s", "Invalid port \n");
1981 return;
1982 }
1983
1984 if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) {
1985 dbg("%s", "Invalid Serial \n");
1986 return;
1987 }
1988
1989 serial = port->serial;
1990
1991 dbg("%s - port %d", __FUNCTION__, mos7840_port->port->number);
1992
1993 if (!mos7840_port->open) {
1994 dbg("%s - port not opened", __FUNCTION__);
1995 return;
1996 }
1997
1998 tty = mos7840_port->port->tty;
1999
2000 if ((!tty) || (!tty->termios)) {
2001 dbg("%s - no tty structures", __FUNCTION__);
2002 return;
2003 }
2004
2005 dbg("%s", "Entering .......... \n");
2006
2007 lData = LCR_BITS_8;
2008 lStop = LCR_STOP_1;
2009 lParity = LCR_PAR_NONE;
2010
2011 cflag = tty->termios->c_cflag;
2012 iflag = tty->termios->c_iflag;
2013
2014 /* Change the number of bits */
2015 if (cflag & CSIZE) {
2016 switch (cflag & CSIZE) {
2017 case CS5:
2018 lData = LCR_BITS_5;
2019 break;
2020
2021 case CS6:
2022 lData = LCR_BITS_6;
2023 break;
2024
2025 case CS7:
2026 lData = LCR_BITS_7;
2027 break;
2028 default:
2029 case CS8:
2030 lData = LCR_BITS_8;
2031 break;
2032 }
2033 }
2034 /* Change the Parity bit */
2035 if (cflag & PARENB) {
2036 if (cflag & PARODD) {
2037 lParity = LCR_PAR_ODD;
2038 dbg("%s - parity = odd", __FUNCTION__);
2039 } else {
2040 lParity = LCR_PAR_EVEN;
2041 dbg("%s - parity = even", __FUNCTION__);
2042 }
2043
2044 } else {
2045 dbg("%s - parity = none", __FUNCTION__);
2046 }
2047
2048 if (cflag & CMSPAR) {
2049 lParity = lParity | 0x20;
2050 }
2051
2052 /* Change the Stop bit */
2053 if (cflag & CSTOPB) {
2054 lStop = LCR_STOP_2;
2055 dbg("%s - stop bits = 2", __FUNCTION__);
2056 } else {
2057 lStop = LCR_STOP_1;
2058 dbg("%s - stop bits = 1", __FUNCTION__);
2059 }
2060
2061 /* Update the LCR with the correct value */
2062 mos7840_port->shadowLCR &=
2063 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2064 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2065
2066 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
2067 mos7840_port->shadowLCR);
2068 /* Disable Interrupts */
2069 Data = 0x00;
2070 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2071
2072 Data = 0x00;
2073 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2074
2075 Data = 0xcf;
2076 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2077
2078 /* Send the updated LCR value to the mos7840 */
2079 Data = mos7840_port->shadowLCR;
2080
2081 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2082
2083 Data = 0x00b;
2084 mos7840_port->shadowMCR = Data;
2085 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2086 Data = 0x00b;
2087 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2088
2089 /* set up the MCR register and send it to the mos7840 */
2090
2091 mos7840_port->shadowMCR = MCR_MASTER_IE;
2092 if (cflag & CBAUD) {
2093 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2094 }
2095
2096 if (cflag & CRTSCTS) {
2097 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2098
2099 } else {
2100 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2101 }
2102
2103 Data = mos7840_port->shadowMCR;
2104 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2105
2106 /* Determine divisor based on baud rate */
2107 baud = tty_get_baud_rate(tty);
2108
2109 if (!baud) {
2110 /* pick a default, any default... */
2111 dbg("%s\n", "Picked default baud...");
2112 baud = 9600;
2113 }
2114
2115 dbg("%s - baud rate = %d", __FUNCTION__, baud);
2116 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2117
2118 /* Enable Interrupts */
2119 Data = 0x0c;
2120 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2121
2122 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2123 mos7840_port->read_urb->dev = serial->dev;
2124
2125 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2126
2127 if (status) {
2128 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2129 status);
2130 }
2131 }
2132 wake_up(&mos7840_port->delta_msr_wait);
2133 mos7840_port->delta_msr_cond = 1;
2134 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
2135 mos7840_port->shadowLCR);
2136
2137 return;
2138 }
2139
2140 /*****************************************************************************
2141 * mos7840_set_termios
2142 * this function is called by the tty driver when it wants to change
2143 * the termios structure
2144 *****************************************************************************/
2145
2146 static void mos7840_set_termios(struct usb_serial_port *port,
2147 struct ktermios *old_termios)
2148 {
2149 int status;
2150 unsigned int cflag;
2151 struct usb_serial *serial;
2152 struct moschip_port *mos7840_port;
2153 struct tty_struct *tty;
2154 dbg("mos7840_set_termios: START\n");
2155 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
2156 dbg("%s", "Invalid port \n");
2157 return;
2158 }
2159
2160 serial = port->serial;
2161
2162 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
2163 dbg("%s", "Invalid Serial \n");
2164 return;
2165 }
2166
2167 mos7840_port = mos7840_get_port_private(port);
2168
2169 if (mos7840_port == NULL)
2170 return;
2171
2172 tty = port->tty;
2173
2174 if (!port->tty || !port->tty->termios) {
2175 dbg("%s - no tty or termios", __FUNCTION__);
2176 return;
2177 }
2178
2179 if (!mos7840_port->open) {
2180 dbg("%s - port not opened", __FUNCTION__);
2181 return;
2182 }
2183
2184 dbg("%s\n", "setting termios - ");
2185
2186 cflag = tty->termios->c_cflag;
2187
2188 if (!cflag) {
2189 dbg("%s %s\n", __FUNCTION__, "cflag is NULL");
2190 return;
2191 }
2192
2193 /* check that they really want us to change something */
2194 if (old_termios) {
2195 if ((cflag == old_termios->c_cflag) &&
2196 (RELEVANT_IFLAG(tty->termios->c_iflag) ==
2197 RELEVANT_IFLAG(old_termios->c_iflag))) {
2198 dbg("%s\n", "Nothing to change");
2199 return;
2200 }
2201 }
2202
2203 dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
2204 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2205
2206 if (old_termios) {
2207 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
2208 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2209 }
2210
2211 dbg("%s - port %d", __FUNCTION__, port->number);
2212
2213 /* change the port settings to the new ones specified */
2214
2215 mos7840_change_port_settings(mos7840_port, old_termios);
2216
2217 if (!mos7840_port->read_urb) {
2218 dbg("%s", "URB KILLED !!!!!\n");
2219 return;
2220 }
2221
2222 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2223 mos7840_port->read_urb->dev = serial->dev;
2224 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2225 if (status) {
2226 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2227 status);
2228 }
2229 }
2230 return;
2231 }
2232
2233 /*****************************************************************************
2234 * mos7840_get_lsr_info - get line status register info
2235 *
2236 * Purpose: Let user call ioctl() to get info when the UART physically
2237 * is emptied. On bus types like RS485, the transmitter must
2238 * release the bus after transmitting. This must be done when
2239 * the transmit shift register is empty, not be done when the
2240 * transmit holding register is empty. This functionality
2241 * allows an RS485 driver to be written in user space.
2242 *****************************************************************************/
2243
2244 static int mos7840_get_lsr_info(struct moschip_port *mos7840_port,
2245 unsigned int __user *value)
2246 {
2247 int count;
2248 unsigned int result = 0;
2249
2250 count = mos7840_chars_in_buffer(mos7840_port->port);
2251 if (count == 0) {
2252 dbg("%s -- Empty", __FUNCTION__);
2253 result = TIOCSER_TEMT;
2254 }
2255
2256 if (copy_to_user(value, &result, sizeof(int)))
2257 return -EFAULT;
2258 return 0;
2259 }
2260
2261 /*****************************************************************************
2262 * mos7840_get_bytes_avail - get number of bytes available
2263 *
2264 * Purpose: Let user call ioctl to get the count of number of bytes available.
2265 *****************************************************************************/
2266
2267 static int mos7840_get_bytes_avail(struct moschip_port *mos7840_port,
2268 unsigned int __user *value)
2269 {
2270 unsigned int result = 0;
2271 struct tty_struct *tty = mos7840_port->port->tty;
2272
2273 if (!tty)
2274 return -ENOIOCTLCMD;
2275
2276 result = tty->read_cnt;
2277
2278 dbg("%s(%d) = %d", __FUNCTION__, mos7840_port->port->number, result);
2279 if (copy_to_user(value, &result, sizeof(int)))
2280 return -EFAULT;
2281
2282 return -ENOIOCTLCMD;
2283 }
2284
2285 /*****************************************************************************
2286 * mos7840_set_modem_info
2287 * function to set modem info
2288 *****************************************************************************/
2289
2290 static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
2291 unsigned int cmd, unsigned int __user *value)
2292 {
2293 unsigned int mcr;
2294 unsigned int arg;
2295 __u16 Data;
2296 int status;
2297 struct usb_serial_port *port;
2298
2299 if (mos7840_port == NULL)
2300 return -1;
2301
2302 port = (struct usb_serial_port *)mos7840_port->port;
2303 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
2304 dbg("%s", "Invalid port \n");
2305 return -1;
2306 }
2307
2308 mcr = mos7840_port->shadowMCR;
2309
2310 if (copy_from_user(&arg, value, sizeof(int)))
2311 return -EFAULT;
2312
2313 switch (cmd) {
2314 case TIOCMBIS:
2315 if (arg & TIOCM_RTS)
2316 mcr |= MCR_RTS;
2317 if (arg & TIOCM_DTR)
2318 mcr |= MCR_RTS;
2319 if (arg & TIOCM_LOOP)
2320 mcr |= MCR_LOOPBACK;
2321 break;
2322
2323 case TIOCMBIC:
2324 if (arg & TIOCM_RTS)
2325 mcr &= ~MCR_RTS;
2326 if (arg & TIOCM_DTR)
2327 mcr &= ~MCR_RTS;
2328 if (arg & TIOCM_LOOP)
2329 mcr &= ~MCR_LOOPBACK;
2330 break;
2331
2332 case TIOCMSET:
2333 /* turn off the RTS and DTR and LOOPBACK
2334 * and then only turn on what was asked to */
2335 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK);
2336 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0);
2337 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0);
2338 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0);
2339 break;
2340 }
2341
2342 mos7840_port->shadowMCR = mcr;
2343
2344 Data = mos7840_port->shadowMCR;
2345 status = 0;
2346 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2347 if (status < 0) {
2348 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
2349 return -1;
2350 }
2351
2352 return 0;
2353 }
2354
2355 /*****************************************************************************
2356 * mos7840_get_modem_info
2357 * function to get modem info
2358 *****************************************************************************/
2359
2360 static int mos7840_get_modem_info(struct moschip_port *mos7840_port,
2361 unsigned int __user *value)
2362 {
2363 unsigned int result = 0;
2364 __u16 msr;
2365 unsigned int mcr = mos7840_port->shadowMCR;
2366 int status = 0;
2367 status =
2368 mos7840_get_uart_reg(mos7840_port->port, MODEM_STATUS_REGISTER,
2369 &msr);
2370 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
2371 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
2372 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
2373 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */
2374 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
2375 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
2376
2377 dbg("%s -- %x", __FUNCTION__, result);
2378
2379 if (copy_to_user(value, &result, sizeof(int)))
2380 return -EFAULT;
2381 return 0;
2382 }
2383
2384 /*****************************************************************************
2385 * mos7840_get_serial_info
2386 * function to get information about serial port
2387 *****************************************************************************/
2388
2389 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2390 struct serial_struct __user *retinfo)
2391 {
2392 struct serial_struct tmp;
2393
2394 if (mos7840_port == NULL)
2395 return -1;
2396
2397 if (!retinfo)
2398 return -EFAULT;
2399
2400 memset(&tmp, 0, sizeof(tmp));
2401
2402 tmp.type = PORT_16550A;
2403 tmp.line = mos7840_port->port->serial->minor;
2404 tmp.port = mos7840_port->port->number;
2405 tmp.irq = 0;
2406 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2407 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2408 tmp.baud_base = 9600;
2409 tmp.close_delay = 5 * HZ;
2410 tmp.closing_wait = 30 * HZ;
2411
2412 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2413 return -EFAULT;
2414 return 0;
2415 }
2416
2417 /*****************************************************************************
2418 * SerialIoctl
2419 * this function handles any ioctl calls to the driver
2420 *****************************************************************************/
2421
2422 static int mos7840_ioctl(struct usb_serial_port *port, struct file *file,
2423 unsigned int cmd, unsigned long arg)
2424 {
2425 void __user *argp = (void __user *)arg;
2426 struct moschip_port *mos7840_port;
2427 struct tty_struct *tty;
2428
2429 struct async_icount cnow;
2430 struct async_icount cprev;
2431 struct serial_icounter_struct icount;
2432 int mosret = 0;
2433 int retval;
2434 struct tty_ldisc *ld;
2435
2436 if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
2437 dbg("%s", "Invalid port \n");
2438 return -1;
2439 }
2440
2441 mos7840_port = mos7840_get_port_private(port);
2442
2443 if (mos7840_port == NULL)
2444 return -1;
2445
2446 tty = mos7840_port->port->tty;
2447
2448 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
2449
2450 switch (cmd) {
2451 /* return number of bytes available */
2452
2453 case TIOCINQ:
2454 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
2455 return mos7840_get_bytes_avail(mos7840_port, argp);
2456
2457 case TIOCOUTQ:
2458 dbg("%s (%d) TIOCOUTQ", __FUNCTION__, port->number);
2459 return put_user(tty->driver->chars_in_buffer ?
2460 tty->driver->chars_in_buffer(tty) : 0,
2461 (int __user *)arg);
2462
2463 case TCFLSH:
2464 retval = tty_check_change(tty);
2465 if (retval)
2466 return retval;
2467
2468 ld = tty_ldisc_ref(tty);
2469 switch (arg) {
2470 case TCIFLUSH:
2471 if (ld && ld->flush_buffer)
2472 ld->flush_buffer(tty);
2473 break;
2474 case TCIOFLUSH:
2475 if (ld && ld->flush_buffer)
2476 ld->flush_buffer(tty);
2477 /* fall through */
2478 case TCOFLUSH:
2479 if (tty->driver->flush_buffer)
2480 tty->driver->flush_buffer(tty);
2481 break;
2482 default:
2483 tty_ldisc_deref(ld);
2484 return -EINVAL;
2485 }
2486 tty_ldisc_deref(ld);
2487 return 0;
2488
2489 case TIOCSERGETLSR:
2490 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
2491 return mos7840_get_lsr_info(mos7840_port, argp);
2492 return 0;
2493
2494 case TIOCMBIS:
2495 case TIOCMBIC:
2496 case TIOCMSET:
2497 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,
2498 port->number);
2499 mosret =
2500 mos7840_set_modem_info(mos7840_port, cmd, argp);
2501 return mosret;
2502
2503 case TIOCMGET:
2504 dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number);
2505 return mos7840_get_modem_info(mos7840_port, argp);
2506
2507 case TIOCGSERIAL:
2508 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
2509 return mos7840_get_serial_info(mos7840_port, argp);
2510
2511 case TIOCSSERIAL:
2512 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
2513 break;
2514
2515 case TIOCMIWAIT:
2516 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
2517 cprev = mos7840_port->icount;
2518 while (1) {
2519 //interruptible_sleep_on(&mos7840_port->delta_msr_wait);
2520 mos7840_port->delta_msr_cond = 0;
2521 wait_event_interruptible(mos7840_port->delta_msr_wait,
2522 (mos7840_port->
2523 delta_msr_cond == 1));
2524
2525 /* see if a signal did it */
2526 if (signal_pending(current))
2527 return -ERESTARTSYS;
2528 cnow = mos7840_port->icount;
2529 smp_rmb();
2530 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2531 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2532 return -EIO; /* no change => error */
2533 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2534 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2535 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2536 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2537 return 0;
2538 }
2539 cprev = cnow;
2540 }
2541 /* NOTREACHED */
2542 break;
2543
2544 case TIOCGICOUNT:
2545 cnow = mos7840_port->icount;
2546 smp_rmb();
2547 icount.cts = cnow.cts;
2548 icount.dsr = cnow.dsr;
2549 icount.rng = cnow.rng;
2550 icount.dcd = cnow.dcd;
2551 icount.rx = cnow.rx;
2552 icount.tx = cnow.tx;
2553 icount.frame = cnow.frame;
2554 icount.overrun = cnow.overrun;
2555 icount.parity = cnow.parity;
2556 icount.brk = cnow.brk;
2557 icount.buf_overrun = cnow.buf_overrun;
2558
2559 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,
2560 port->number, icount.rx, icount.tx);
2561 if (copy_to_user(argp, &icount, sizeof(icount)))
2562 return -EFAULT;
2563 return 0;
2564
2565 case TIOCEXBAUD:
2566 return 0;
2567 default:
2568 break;
2569 }
2570
2571 return -ENOIOCTLCMD;
2572 }
2573
2574 static int mos7840_calc_num_ports(struct usb_serial *serial)
2575 {
2576 int mos7840_num_ports = 0;
2577
2578 dbg("numberofendpoints: %d \n",
2579 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
2580 dbg("numberofendpoints: %d \n",
2581 (int)serial->interface->altsetting->desc.bNumEndpoints);
2582 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
2583 mos7840_num_ports = serial->num_ports = 2;
2584 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
2585 serial->num_bulk_in = 4;
2586 serial->num_bulk_out = 4;
2587 mos7840_num_ports = serial->num_ports = 4;
2588 }
2589
2590 return mos7840_num_ports;
2591 }
2592
2593 /****************************************************************************
2594 * mos7840_startup
2595 ****************************************************************************/
2596
2597 static int mos7840_startup(struct usb_serial *serial)
2598 {
2599 struct moschip_port *mos7840_port;
2600 struct usb_device *dev;
2601 int i, status;
2602
2603 __u16 Data;
2604 dbg("%s \n", " mos7840_startup :entering..........");
2605
2606 if (!serial) {
2607 dbg("%s\n", "Invalid Handler");
2608 return -1;
2609 }
2610
2611 dev = serial->dev;
2612
2613 dbg("%s\n", "Entering...");
2614
2615 /* we set up the pointers to the endpoints in the mos7840_open *
2616 * function, as the structures aren't created yet. */
2617
2618 /* set up port private structures */
2619 for (i = 0; i < serial->num_ports; ++i) {
2620 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2621 if (mos7840_port == NULL) {
2622 err("%s - Out of memory", __FUNCTION__);
2623 status = -ENOMEM;
2624 i--; /* don't follow NULL pointer cleaning up */
2625 goto error;
2626 }
2627
2628 /* Initialize all port interrupt end point to port 0 int endpoint *
2629 * Our device has only one interrupt end point comman to all port */
2630
2631 mos7840_port->port = serial->port[i];
2632 mos7840_set_port_private(serial->port[i], mos7840_port);
2633 spin_lock_init(&mos7840_port->pool_lock);
2634
2635 mos7840_port->port_num = ((serial->port[i]->number -
2636 (serial->port[i]->serial->minor)) +
2637 1);
2638
2639 if (mos7840_port->port_num == 1) {
2640 mos7840_port->SpRegOffset = 0x0;
2641 mos7840_port->ControlRegOffset = 0x1;
2642 mos7840_port->DcrRegOffset = 0x4;
2643 } else if ((mos7840_port->port_num == 2)
2644 && (serial->num_ports == 4)) {
2645 mos7840_port->SpRegOffset = 0x8;
2646 mos7840_port->ControlRegOffset = 0x9;
2647 mos7840_port->DcrRegOffset = 0x16;
2648 } else if ((mos7840_port->port_num == 2)
2649 && (serial->num_ports == 2)) {
2650 mos7840_port->SpRegOffset = 0xa;
2651 mos7840_port->ControlRegOffset = 0xb;
2652 mos7840_port->DcrRegOffset = 0x19;
2653 } else if ((mos7840_port->port_num == 3)
2654 && (serial->num_ports == 4)) {
2655 mos7840_port->SpRegOffset = 0xa;
2656 mos7840_port->ControlRegOffset = 0xb;
2657 mos7840_port->DcrRegOffset = 0x19;
2658 } else if ((mos7840_port->port_num == 4)
2659 && (serial->num_ports == 4)) {
2660 mos7840_port->SpRegOffset = 0xc;
2661 mos7840_port->ControlRegOffset = 0xd;
2662 mos7840_port->DcrRegOffset = 0x1c;
2663 }
2664 mos7840_dump_serial_port(mos7840_port);
2665
2666 mos7840_set_port_private(serial->port[i], mos7840_port);
2667
2668 //enable rx_disable bit in control register
2669
2670 status =
2671 mos7840_get_reg_sync(serial->port[i],
2672 mos7840_port->ControlRegOffset, &Data);
2673 if (status < 0) {
2674 dbg("Reading ControlReg failed status-0x%x\n", status);
2675 break;
2676 } else
2677 dbg("ControlReg Reading success val is %x, status%d\n",
2678 Data, status);
2679 Data |= 0x08; //setting driver done bit
2680 Data |= 0x04; //sp1_bit to have cts change reflect in modem status reg
2681
2682 //Data |= 0x20; //rx_disable bit
2683 status = 0;
2684 status =
2685 mos7840_set_reg_sync(serial->port[i],
2686 mos7840_port->ControlRegOffset, Data);
2687 if (status < 0) {
2688 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2689 break;
2690 } else
2691 dbg("ControlReg Writing success(rx_disable) status%d\n",
2692 status);
2693
2694 //Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 and 0x24 in DCR3
2695 Data = 0x01;
2696 status = 0;
2697 status =
2698 mos7840_set_reg_sync(serial->port[i],
2699 (__u16) (mos7840_port->DcrRegOffset +
2700 0), Data);
2701 if (status < 0) {
2702 dbg("Writing DCR0 failed status-0x%x\n", status);
2703 break;
2704 } else
2705 dbg("DCR0 Writing success status%d\n", status);
2706
2707 Data = 0x05;
2708 status = 0;
2709 status =
2710 mos7840_set_reg_sync(serial->port[i],
2711 (__u16) (mos7840_port->DcrRegOffset +
2712 1), Data);
2713 if (status < 0) {
2714 dbg("Writing DCR1 failed status-0x%x\n", status);
2715 break;
2716 } else
2717 dbg("DCR1 Writing success status%d\n", status);
2718
2719 Data = 0x24;
2720 status = 0;
2721 status =
2722 mos7840_set_reg_sync(serial->port[i],
2723 (__u16) (mos7840_port->DcrRegOffset +
2724 2), Data);
2725 if (status < 0) {
2726 dbg("Writing DCR2 failed status-0x%x\n", status);
2727 break;
2728 } else
2729 dbg("DCR2 Writing success status%d\n", status);
2730
2731 // write values in clkstart0x0 and clkmulti 0x20
2732 Data = 0x0;
2733 status = 0;
2734 status =
2735 mos7840_set_reg_sync(serial->port[i],
2736 CLK_START_VALUE_REGISTER, Data);
2737 if (status < 0) {
2738 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2739 break;
2740 } else
2741 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2742
2743 Data = 0x20;
2744 status =
2745 mos7840_set_reg_sync(serial->port[i], CLK_MULTI_REGISTER,
2746 Data);
2747 if (status < 0) {
2748 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
2749 status);
2750 goto error;
2751 } else
2752 dbg("CLK_MULTI_REGISTER Writing success status%d\n",
2753 status);
2754
2755 //write value 0x0 to scratchpad register
2756 Data = 0x00;
2757 status =
2758 mos7840_set_uart_reg(serial->port[i], SCRATCH_PAD_REGISTER,
2759 Data);
2760 if (status < 0) {
2761 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
2762 status);
2763 break;
2764 } else
2765 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
2766 status);
2767
2768 //Zero Length flag register
2769 if ((mos7840_port->port_num != 1)
2770 && (serial->num_ports == 2)) {
2771
2772 Data = 0xff;
2773 status = 0;
2774 status = mos7840_set_reg_sync(serial->port[i],
2775 (__u16) (ZLP_REG1 +
2776 ((__u16)
2777 mos7840_port->
2778 port_num)),
2779 Data);
2780 dbg("ZLIP offset%x\n",
2781 (__u16) (ZLP_REG1 +
2782 ((__u16) mos7840_port->port_num)));
2783 if (status < 0) {
2784 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2785 i + 2, status);
2786 break;
2787 } else
2788 dbg("ZLP_REG%d Writing success status%d\n",
2789 i + 2, status);
2790 } else {
2791 Data = 0xff;
2792 status = 0;
2793 status = mos7840_set_reg_sync(serial->port[i],
2794 (__u16) (ZLP_REG1 +
2795 ((__u16)
2796 mos7840_port->
2797 port_num) -
2798 0x1), Data);
2799 dbg("ZLIP offset%x\n",
2800 (__u16) (ZLP_REG1 +
2801 ((__u16) mos7840_port->port_num) - 0x1));
2802 if (status < 0) {
2803 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2804 i + 1, status);
2805 break;
2806 } else
2807 dbg("ZLP_REG%d Writing success status%d\n",
2808 i + 1, status);
2809
2810 }
2811 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2812 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2813 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
2814 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || !mos7840_port->dr) {
2815 status = -ENOMEM;
2816 goto error;
2817 }
2818 }
2819
2820 //Zero Length flag enable
2821 Data = 0x0f;
2822 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2823 if (status < 0) {
2824 dbg("Writing ZLP_REG5 failed status-0x%x\n", status);
2825 return -1;
2826 } else
2827 dbg("ZLP_REG5 Writing success status%d\n", status);
2828
2829 /* setting configuration feature to one */
2830 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2831 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
2832 return 0;
2833 error:
2834 for (/* nothing */; i >= 0; i--) {
2835 mos7840_port = mos7840_get_port_private(serial->port[i]);
2836
2837 kfree(mos7840_port->dr);
2838 kfree(mos7840_port->ctrl_buf);
2839 usb_free_urb(mos7840_port->control_urb);
2840 kfree(mos7840_port);
2841 serial->port[i] = NULL;
2842 }
2843 return status;
2844 }
2845
2846 /****************************************************************************
2847 * mos7840_shutdown
2848 * This function is called whenever the device is removed from the usb bus.
2849 ****************************************************************************/
2850
2851 static void mos7840_shutdown(struct usb_serial *serial)
2852 {
2853 int i;
2854 unsigned long flags;
2855 struct moschip_port *mos7840_port;
2856 dbg("%s \n", " shutdown :entering..........");
2857
2858 if (!serial) {
2859 dbg("%s", "Invalid Handler \n");
2860 return;
2861 }
2862
2863 /* check for the ports to be closed,close the ports and disconnect */
2864
2865 /* free private structure allocated for serial port *
2866 * stop reads and writes on all ports */
2867
2868 for (i = 0; i < serial->num_ports; ++i) {
2869 mos7840_port = mos7840_get_port_private(serial->port[i]);
2870 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2871 mos7840_port->zombie = 1;
2872 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
2873 usb_kill_urb(mos7840_port->control_urb);
2874 kfree(mos7840_port->ctrl_buf);
2875 kfree(mos7840_port->dr);
2876 kfree(mos7840_port);
2877 mos7840_set_port_private(serial->port[i], NULL);
2878 }
2879
2880 dbg("%s\n", "Thank u :: ");
2881
2882 }
2883
2884 static struct usb_driver io_driver = {
2885 .name = "mos7840",
2886 .probe = usb_serial_probe,
2887 .disconnect = usb_serial_disconnect,
2888 .id_table = moschip_id_table_combined,
2889 .no_dynamic_id = 1,
2890 };
2891
2892 static struct usb_serial_driver moschip7840_4port_device = {
2893 .driver = {
2894 .owner = THIS_MODULE,
2895 .name = "mos7840",
2896 },
2897 .description = DRIVER_DESC,
2898 .usb_driver = &io_driver,
2899 .id_table = moschip_port_id_table,
2900 .num_interrupt_in = 1, //NUM_DONT_CARE,//1,
2901 #ifdef check
2902 .num_bulk_in = 4,
2903 .num_bulk_out = 4,
2904 .num_ports = 4,
2905 #endif
2906 .open = mos7840_open,
2907 .close = mos7840_close,
2908 .write = mos7840_write,
2909 .write_room = mos7840_write_room,
2910 .chars_in_buffer = mos7840_chars_in_buffer,
2911 .throttle = mos7840_throttle,
2912 .unthrottle = mos7840_unthrottle,
2913 .calc_num_ports = mos7840_calc_num_ports,
2914 #ifdef MCSSerialProbe
2915 .probe = mos7840_serial_probe,
2916 #endif
2917 .ioctl = mos7840_ioctl,
2918 .set_termios = mos7840_set_termios,
2919 .break_ctl = mos7840_break,
2920 .tiocmget = mos7840_tiocmget,
2921 .tiocmset = mos7840_tiocmset,
2922 .attach = mos7840_startup,
2923 .shutdown = mos7840_shutdown,
2924 .read_bulk_callback = mos7840_bulk_in_callback,
2925 .read_int_callback = mos7840_interrupt_callback,
2926 };
2927
2928 /****************************************************************************
2929 * moschip7840_init
2930 * This is called by the module subsystem, or on startup to initialize us
2931 ****************************************************************************/
2932 static int __init moschip7840_init(void)
2933 {
2934 int retval;
2935
2936 dbg("%s \n", " mos7840_init :entering..........");
2937
2938 /* Register with the usb serial */
2939 retval = usb_serial_register(&moschip7840_4port_device);
2940
2941 if (retval)
2942 goto failed_port_device_register;
2943
2944 dbg("%s\n", "Entring...");
2945 info(DRIVER_DESC " " DRIVER_VERSION);
2946
2947 /* Register with the usb */
2948 retval = usb_register(&io_driver);
2949
2950 if (retval)
2951 goto failed_usb_register;
2952
2953 if (retval == 0) {
2954 dbg("%s\n", "Leaving...");
2955 return 0;
2956 }
2957
2958 failed_usb_register:
2959 usb_serial_deregister(&moschip7840_4port_device);
2960
2961 failed_port_device_register:
2962
2963 return retval;
2964 }
2965
2966 /****************************************************************************
2967 * moschip7840_exit
2968 * Called when the driver is about to be unloaded.
2969 ****************************************************************************/
2970 static void __exit moschip7840_exit(void)
2971 {
2972
2973 dbg("%s \n", " mos7840_exit :entering..........");
2974
2975 usb_deregister(&io_driver);
2976
2977 usb_serial_deregister(&moschip7840_4port_device);
2978
2979 dbg("%s\n", "Entring...");
2980 }
2981
2982 module_init(moschip7840_init);
2983 module_exit(moschip7840_exit);
2984
2985 /* Module information */
2986 MODULE_DESCRIPTION(DRIVER_DESC);
2987 MODULE_LICENSE("GPL");
2988
2989 module_param(debug, bool, S_IRUGO | S_IWUSR);
2990 MODULE_PARM_DESC(debug, "Debug enabled or not");
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