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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen...
[deliverable/linux.git] / drivers / usb / serial / mos7840.c
CommitLineData
3f542974
PS		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 *
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
18 *
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
22 *
23 */
24
25#include <linux/kernel.h>
26#include <linux/errno.h>
27#include <linux/init.h>
28#include <linux/slab.h>
29#include <linux/tty.h>
30#include <linux/tty_driver.h>
31#include <linux/tty_flip.h>
32#include <linux/module.h>
33#include <linux/serial.h>
34#include <linux/usb.h>
35#include <linux/usb/serial.h>
880af9db 36#include <linux/uaccess.h>
3f542974
PS		 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
880af9db
AC		 85#define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
86#define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
3f542974
PS		 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
880af9db
AC		 105#define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
106#define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
3f542974
PS		 107
108/* For higher baud Rates use TIOCEXBAUD */
109#define TIOCEXBAUD 0x5462
110
111/* vendor id and device id defines */
112
11e1abb4 113/* The native mos7840/7820 component */
3f542974
PS		 114#define USB_VENDOR_ID_MOSCHIP 0x9710
115#define MOSCHIP_DEVICE_ID_7840 0x7840
116#define MOSCHIP_DEVICE_ID_7820 0x7820
11e1abb4
DL		 117/* The native component can have its vendor/device id's overridden
118 * in vendor-specific implementations. Such devices can be handled
119 * by making a change here, in moschip_port_id_table, and in
120 * moschip_id_table_combined
121 */
122#define USB_VENDOR_ID_BANDB 0x0856
123#define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
124#define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
3f542974 125
11e1abb4 126/* Interrupt Routine Defines */
3f542974
PS		 127
128#define SERIAL_IIR_RLS 0x06
129#define SERIAL_IIR_MS 0x00
130
131/*
132 * Emulation of the bit mask on the LINE STATUS REGISTER.
133 */
134#define SERIAL_LSR_DR 0x0001
135#define SERIAL_LSR_OE 0x0002
136#define SERIAL_LSR_PE 0x0004
137#define SERIAL_LSR_FE 0x0008
138#define SERIAL_LSR_BI 0x0010
139
140#define MOS_MSR_DELTA_CTS 0x10
141#define MOS_MSR_DELTA_DSR 0x20
142#define MOS_MSR_DELTA_RI 0x40
143#define MOS_MSR_DELTA_CD 0x80
144
880af9db 145/* Serial Port register Address */
3f542974
PS		 146#define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
147#define FIFO_CONTROL_REGISTER ((__u16)(0x02))
148#define LINE_CONTROL_REGISTER ((__u16)(0x03))
149#define MODEM_CONTROL_REGISTER ((__u16)(0x04))
150#define LINE_STATUS_REGISTER ((__u16)(0x05))
151#define MODEM_STATUS_REGISTER ((__u16)(0x06))
152#define SCRATCH_PAD_REGISTER ((__u16)(0x07))
153#define DIVISOR_LATCH_LSB ((__u16)(0x00))
154#define DIVISOR_LATCH_MSB ((__u16)(0x01))
155
156#define CLK_MULTI_REGISTER ((__u16)(0x02))
157#define CLK_START_VALUE_REGISTER ((__u16)(0x03))
158
159#define SERIAL_LCR_DLAB ((__u16)(0x0080))
160
161/*
162 * URB POOL related defines
163 */
164#define NUM_URBS 16 /* URB Count */
165#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
166
167
168static struct usb_device_id moschip_port_id_table[] = {
169 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
170 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
11e1abb4
DL		 171 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
172 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
3f542974
PS		 173 {} /* terminating entry */
174};
175
176static __devinitdata struct usb_device_id moschip_id_table_combined[] = {
177 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
178 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
11e1abb4
DL		 179 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
180 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
3f542974
PS		 181 {} /* terminating entry */
182};
183
184MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
185
186/* This structure holds all of the local port information */
187
188struct moschip_port {
189 int port_num; /*Actual port number in the device(1,2,etc) */
190 struct urb *write_urb; /* write URB for this port */
191 struct urb *read_urb; /* read URB for this port */
0de9a702 192 struct urb *int_urb;
3f542974
PS		 193 __u8 shadowLCR; /* last LCR value received */
194 __u8 shadowMCR; /* last MCR value received */
195 char open;
0de9a702
ON		 196 char open_ports;
197 char zombie;
3f542974
PS		 198 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
199 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
200 int delta_msr_cond;
201 struct async_icount icount;
202 struct usb_serial_port *port; /* loop back to the owner of this object */
203
880af9db 204 /* Offsets */
3f542974
PS		 205 __u8 SpRegOffset;
206 __u8 ControlRegOffset;
207 __u8 DcrRegOffset;
880af9db 208 /* for processing control URBS in interrupt context */
3f542974 209 struct urb *control_urb;
0de9a702 210 struct usb_ctrlrequest *dr;
3f542974
PS		 211 char *ctrl_buf;
212 int MsrLsr;
213
0de9a702 214 spinlock_t pool_lock;
3f542974 215 struct urb *write_urb_pool[NUM_URBS];
0de9a702 216 char busy[NUM_URBS];
3f542974
PS		 217};
218
219
220static int debug;
3f542974
PS		 221
222/*
223 * mos7840_set_reg_sync
224 * To set the Control register by calling usb_fill_control_urb function
225 * by passing usb_sndctrlpipe function as parameter.
226 */
227
228static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
229 __u16 val)
230{
231 struct usb_device *dev = port->serial->dev;
232 val = val & 0x00ff;
233 dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
234
235 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
236 MCS_WR_RTYPE, val, reg, NULL, 0,
237 MOS_WDR_TIMEOUT);
238}
239
240/*
241 * mos7840_get_reg_sync
242 * To set the Uart register by calling usb_fill_control_urb function by
243 * passing usb_rcvctrlpipe function as parameter.
244 */
245
246static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
880af9db 247 __u16 *val)
3f542974
PS		 248{
249 struct usb_device *dev = port->serial->dev;
250 int ret = 0;
251
252 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
253 MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH,
254 MOS_WDR_TIMEOUT);
255 dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val);
256 *val = (*val) & 0x00ff;
257 return ret;
258}
259
260/*
261 * mos7840_set_uart_reg
262 * To set the Uart register by calling usb_fill_control_urb function by
263 * passing usb_sndctrlpipe function as parameter.
264 */
265
266static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
267 __u16 val)
268{
269
270 struct usb_device *dev = port->serial->dev;
271 val = val & 0x00ff;
880af9db
AC		 272 /* For the UART control registers, the application number need
273 to be Or'ed */
0de9a702 274 if (port->serial->num_ports == 4) {
880af9db
AC		 275 val |= (((__u16) port->number -
276 (__u16) (port->serial->minor)) + 1) << 8;
3f542974
PS		 277 dbg("mos7840_set_uart_reg application number is %x\n", val);
278 } else {
279 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 280 val |= (((__u16) port->number -
3f542974
PS		 281 (__u16) (port->serial->minor)) + 1) << 8;
282 dbg("mos7840_set_uart_reg application number is %x\n",
283 val);
284 } else {
285 val |=
286 (((__u16) port->number -
287 (__u16) (port->serial->minor)) + 2) << 8;
288 dbg("mos7840_set_uart_reg application number is %x\n",
289 val);
290 }
291 }
292 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
293 MCS_WR_RTYPE, val, reg, NULL, 0,
294 MOS_WDR_TIMEOUT);
295
296}
297
298/*
299 * mos7840_get_uart_reg
300 * To set the Control register by calling usb_fill_control_urb function
301 * by passing usb_rcvctrlpipe function as parameter.
302 */
303static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
880af9db 304 __u16 *val)
3f542974
PS		 305{
306 struct usb_device *dev = port->serial->dev;
307 int ret = 0;
308 __u16 Wval;
309
880af9db
AC		 310 /* dbg("application number is %4x \n",
311 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
312 /* Wval is same as application number */
0de9a702 313 if (port->serial->num_ports == 4) {
3f542974
PS		 314 Wval =
315 (((__u16) port->number - (__u16) (port->serial->minor)) +
316 1) << 8;
317 dbg("mos7840_get_uart_reg application number is %x\n", Wval);
318 } else {
319 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 320 Wval = (((__u16) port->number -
3f542974
PS		 321 (__u16) (port->serial->minor)) + 1) << 8;
322 dbg("mos7840_get_uart_reg application number is %x\n",
323 Wval);
324 } else {
880af9db 325 Wval = (((__u16) port->number -
3f542974
PS		 326 (__u16) (port->serial->minor)) + 2) << 8;
327 dbg("mos7840_get_uart_reg application number is %x\n",
328 Wval);
329 }
330 }
331 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
332 MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH,
333 MOS_WDR_TIMEOUT);
334 *val = (*val) & 0x00ff;
335 return ret;
336}
337
338static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
339{
340
341 dbg("***************************************\n");
342 dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
343 dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset);
344 dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset);
345 dbg("***************************************\n");
346
347}
348
349/************************************************************************/
350/************************************************************************/
351/* I N T E R F A C E F U N C T I O N S */
352/* I N T E R F A C E F U N C T I O N S */
353/************************************************************************/
354/************************************************************************/
355
356static inline void mos7840_set_port_private(struct usb_serial_port *port,
357 struct moschip_port *data)
358{
359 usb_set_serial_port_data(port, (void *)data);
360}
361
362static inline struct moschip_port *mos7840_get_port_private(struct
363 usb_serial_port
364 *port)
365{
366 return (struct moschip_port *)usb_get_serial_port_data(port);
367}
368
0de9a702 369static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
3f542974
PS		 370{
371 struct moschip_port *mos7840_port;
372 struct async_icount *icount;
373 mos7840_port = port;
374 icount = &mos7840_port->icount;
375 if (new_msr &
376 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
377 MOS_MSR_DELTA_CD)) {
378 icount = &mos7840_port->icount;
379
380 /* update input line counters */
381 if (new_msr & MOS_MSR_DELTA_CTS) {
382 icount->cts++;
0de9a702 383 smp_wmb();
3f542974
PS		 384 }
385 if (new_msr & MOS_MSR_DELTA_DSR) {
386 icount->dsr++;
0de9a702 387 smp_wmb();
3f542974
PS		 388 }
389 if (new_msr & MOS_MSR_DELTA_CD) {
390 icount->dcd++;
0de9a702 391 smp_wmb();
3f542974
PS		 392 }
393 if (new_msr & MOS_MSR_DELTA_RI) {
394 icount->rng++;
0de9a702 395 smp_wmb();
3f542974
PS		 396 }
397 }
3f542974
PS		 398}
399
0de9a702 400static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
3f542974
PS		 401{
402 struct async_icount *icount;
403
441b62c1 404 dbg("%s - %02x", __func__, new_lsr);
3f542974
PS		 405
406 if (new_lsr & SERIAL_LSR_BI) {
880af9db
AC		 407 /*
408 * Parity and Framing errors only count if they
409 * occur exclusive of a break being
410 * received.
411 */
3f542974
PS		 412 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
413 }
414
415 /* update input line counters */
416 icount = &port->icount;
417 if (new_lsr & SERIAL_LSR_BI) {
418 icount->brk++;
0de9a702 419 smp_wmb();
3f542974
PS		 420 }
421 if (new_lsr & SERIAL_LSR_OE) {
422 icount->overrun++;
0de9a702 423 smp_wmb();
3f542974
PS		 424 }
425 if (new_lsr & SERIAL_LSR_PE) {
426 icount->parity++;
0de9a702 427 smp_wmb();
3f542974
PS		 428 }
429 if (new_lsr & SERIAL_LSR_FE) {
430 icount->frame++;
0de9a702 431 smp_wmb();
3f542974 432 }
3f542974
PS		 433}
434
435/************************************************************************/
436/************************************************************************/
437/* U S B C A L L B A C K F U N C T I O N S */
438/* U S B C A L L B A C K F U N C T I O N S */
439/************************************************************************/
440/************************************************************************/
441
7d12e780 442static void mos7840_control_callback(struct urb *urb)
3f542974
PS		 443{
444 unsigned char *data;
445 struct moschip_port *mos7840_port;
446 __u8 regval = 0x0;
0de9a702 447 int result = 0;
0643c724 448 int status = urb->status;
3f542974 449
cdc97792 450 mos7840_port = urb->context;
0de9a702 451
0643c724 452 switch (status) {
3f542974
PS		 453 case 0:
454 /* success */
455 break;
456 case -ECONNRESET:
457 case -ENOENT:
458 case -ESHUTDOWN:
459 /* this urb is terminated, clean up */
441b62c1 460 dbg("%s - urb shutting down with status: %d", __func__,
0643c724 461 status);
3f542974
PS		 462 return;
463 default:
441b62c1 464 dbg("%s - nonzero urb status received: %d", __func__,
0643c724 465 status);
3f542974
PS		 466 goto exit;
467 }
468
441b62c1
HH		 469 dbg("%s urb buffer size is %d\n", __func__, urb->actual_length);
470 dbg("%s mos7840_port->MsrLsr is %d port %d\n", __func__,
3f542974
PS		 471 mos7840_port->MsrLsr, mos7840_port->port_num);
472 data = urb->transfer_buffer;
473 regval = (__u8) data[0];
441b62c1 474 dbg("%s data is %x\n", __func__, regval);
3f542974
PS		 475 if (mos7840_port->MsrLsr == 0)
476 mos7840_handle_new_msr(mos7840_port, regval);
477 else if (mos7840_port->MsrLsr == 1)
478 mos7840_handle_new_lsr(mos7840_port, regval);
479
0de9a702
ON		 480exit:
481 spin_lock(&mos7840_port->pool_lock);
482 if (!mos7840_port->zombie)
483 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
484 spin_unlock(&mos7840_port->pool_lock);
485 if (result) {
486 dev_err(&urb->dev->dev,
487 "%s - Error %d submitting interrupt urb\n",
441b62c1 488 __func__, result);
0de9a702 489 }
3f542974
PS		 490}
491
492static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
880af9db 493 __u16 *val)
3f542974
PS		 494{
495 struct usb_device *dev = mcs->port->serial->dev;
0de9a702
ON		 496 struct usb_ctrlrequest *dr = mcs->dr;
497 unsigned char *buffer = mcs->ctrl_buf;
498 int ret;
3f542974 499
3f542974
PS		 500 dr->bRequestType = MCS_RD_RTYPE;
501 dr->bRequest = MCS_RDREQ;
880af9db 502 dr->wValue = cpu_to_le16(Wval); /* 0 */
3f542974
PS		 503 dr->wIndex = cpu_to_le16(reg);
504 dr->wLength = cpu_to_le16(2);
505
506 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
507 (unsigned char *)dr, buffer, 2,
508 mos7840_control_callback, mcs);
509 mcs->control_urb->transfer_buffer_length = 2;
510 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
511 return ret;
512}
513
514/*****************************************************************************
515 * mos7840_interrupt_callback
516 * this is the callback function for when we have received data on the
517 * interrupt endpoint.
518 *****************************************************************************/
519
7d12e780 520static void mos7840_interrupt_callback(struct urb *urb)
3f542974
PS		 521{
522 int result;
523 int length;
524 struct moschip_port *mos7840_port;
525 struct usb_serial *serial;
526 __u16 Data;
527 unsigned char *data;
528 __u8 sp[5], st;
0de9a702
ON		 529 int i, rv = 0;
530 __u16 wval, wreg = 0;
0643c724 531 int status = urb->status;
3f542974
PS		 532
533 dbg("%s", " : Entering\n");
3f542974 534
0643c724 535 switch (status) {
3f542974
PS		 536 case 0:
537 /* success */
538 break;
539 case -ECONNRESET:
540 case -ENOENT:
541 case -ESHUTDOWN:
542 /* this urb is terminated, clean up */
441b62c1 543 dbg("%s - urb shutting down with status: %d", __func__,
0643c724 544 status);
3f542974
PS		 545 return;
546 default:
441b62c1 547 dbg("%s - nonzero urb status received: %d", __func__,
0643c724 548 status);
3f542974
PS		 549 goto exit;
550 }
551
552 length = urb->actual_length;
553 data = urb->transfer_buffer;
554
cdc97792 555 serial = urb->context;
3f542974
PS		 556
557 /* Moschip get 5 bytes
558 * Byte 1 IIR Port 1 (port.number is 0)
559 * Byte 2 IIR Port 2 (port.number is 1)
560 * Byte 3 IIR Port 3 (port.number is 2)
561 * Byte 4 IIR Port 4 (port.number is 3)
562 * Byte 5 FIFO status for both */
563
564 if (length && length > 5) {
565 dbg("%s \n", "Wrong data !!!");
566 return;
567 }
568
569 sp[0] = (__u8) data[0];
570 sp[1] = (__u8) data[1];
571 sp[2] = (__u8) data[2];
572 sp[3] = (__u8) data[3];
573 st = (__u8) data[4];
574
575 for (i = 0; i < serial->num_ports; i++) {
576 mos7840_port = mos7840_get_port_private(serial->port[i]);
577 wval =
578 (((__u16) serial->port[i]->number -
579 (__u16) (serial->minor)) + 1) << 8;
580 if (mos7840_port->open) {
581 if (sp[i] & 0x01) {
582 dbg("SP%d No Interrupt !!!\n", i);
583 } else {
584 switch (sp[i] & 0x0f) {
585 case SERIAL_IIR_RLS:
586 dbg("Serial Port %d: Receiver status error or ", i);
587 dbg("address bit detected in 9-bit mode\n");
588 mos7840_port->MsrLsr = 1;
0de9a702 589 wreg = LINE_STATUS_REGISTER;
3f542974
PS		 590 break;
591 case SERIAL_IIR_MS:
592 dbg("Serial Port %d: Modem status change\n", i);
593 mos7840_port->MsrLsr = 0;
0de9a702 594 wreg = MODEM_STATUS_REGISTER;
3f542974
PS		 595 break;
596 }
0de9a702
ON		 597 spin_lock(&mos7840_port->pool_lock);
598 if (!mos7840_port->zombie) {
599 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
600 } else {
601 spin_unlock(&mos7840_port->pool_lock);
602 return;
603 }
604 spin_unlock(&mos7840_port->pool_lock);
3f542974
PS		 605 }
606 }
607 }
880af9db
AC		 608 if (!(rv < 0))
609 /* the completion handler for the control urb will resubmit */
0de9a702
ON		 610 return;
611exit:
3f542974
PS		 612 result = usb_submit_urb(urb, GFP_ATOMIC);
613 if (result) {
614 dev_err(&urb->dev->dev,
615 "%s - Error %d submitting interrupt urb\n",
441b62c1 616 __func__, result);
3f542974 617 }
3f542974
PS		 618}
619
620static int mos7840_port_paranoia_check(struct usb_serial_port *port,
621 const char *function)
622{
623 if (!port) {
624 dbg("%s - port == NULL", function);
625 return -1;
626 }
627 if (!port->serial) {
628 dbg("%s - port->serial == NULL", function);
629 return -1;
630 }
631
632 return 0;
633}
634
635/* Inline functions to check the sanity of a pointer that is passed to us */
636static int mos7840_serial_paranoia_check(struct usb_serial *serial,
637 const char *function)
638{
639 if (!serial) {
640 dbg("%s - serial == NULL", function);
641 return -1;
642 }
643 if (!serial->type) {
644 dbg("%s - serial->type == NULL!", function);
645 return -1;
646 }
647
648 return 0;
649}
650
651static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
652 const char *function)
653{
654 /* if no port was specified, or it fails a paranoia check */
655 if (!port ||
656 mos7840_port_paranoia_check(port, function) ||
657 mos7840_serial_paranoia_check(port->serial, function)) {
880af9db
AC		 658 /* then say that we don't have a valid usb_serial thing,
659 * which will end up genrating -ENODEV return values */
3f542974
PS		 660 return NULL;
661 }
662
663 return port->serial;
664}
665
666/*****************************************************************************
667 * mos7840_bulk_in_callback
668 * this is the callback function for when we have received data on the
669 * bulk in endpoint.
670 *****************************************************************************/
671
7d12e780 672static void mos7840_bulk_in_callback(struct urb *urb)
3f542974 673{
0643c724 674 int retval;
3f542974
PS		 675 unsigned char *data;
676 struct usb_serial *serial;
677 struct usb_serial_port *port;
678 struct moschip_port *mos7840_port;
679 struct tty_struct *tty;
0643c724 680 int status = urb->status;
3f542974 681
0643c724
GKH		 682 if (status) {
683 dbg("nonzero read bulk status received: %d", status);
3f542974
PS		 684 return;
685 }
686
cdc97792 687 mos7840_port = urb->context;
3f542974
PS		 688 if (!mos7840_port) {
689 dbg("%s", "NULL mos7840_port pointer \n");
690 return;
691 }
692
693 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 694 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 695 dbg("%s", "Port Paranoia failed \n");
696 return;
697 }
698
441b62c1 699 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 700 if (!serial) {
701 dbg("%s\n", "Bad serial pointer ");
702 return;
703 }
704
705 dbg("%s\n", "Entering... \n");
706
707 data = urb->transfer_buffer;
708
709 dbg("%s", "Entering ........... \n");
710
711 if (urb->actual_length) {
4a90f09b 712 tty = tty_port_tty_get(&mos7840_port->port->port);
3f542974
PS		 713 if (tty) {
714 tty_buffer_request_room(tty, urb->actual_length);
715 tty_insert_flip_string(tty, data, urb->actual_length);
716 dbg(" %s \n", data);
717 tty_flip_buffer_push(tty);
4a90f09b 718 tty_kref_put(tty);
3f542974
PS		 719 }
720 mos7840_port->icount.rx += urb->actual_length;
0de9a702 721 smp_wmb();
3f542974
PS		 722 dbg("mos7840_port->icount.rx is %d:\n",
723 mos7840_port->icount.rx);
724 }
725
726 if (!mos7840_port->read_urb) {
727 dbg("%s", "URB KILLED !!!\n");
728 return;
729 }
730
3f542974 731
0de9a702 732 mos7840_port->read_urb->dev = serial->dev;
3f542974 733
0643c724 734 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
0de9a702 735
0643c724
GKH		 736 if (retval) {
737 dbg(" usb_submit_urb(read bulk) failed, retval = %d",
738 retval);
3f542974
PS		 739 }
740}
741
742/*****************************************************************************
743 * mos7840_bulk_out_data_callback
880af9db
AC		 744 * this is the callback function for when we have finished sending
745 * serial data on the bulk out endpoint.
3f542974
PS		 746 *****************************************************************************/
747
7d12e780 748static void mos7840_bulk_out_data_callback(struct urb *urb)
3f542974
PS		 749{
750 struct moschip_port *mos7840_port;
751 struct tty_struct *tty;
0643c724 752 int status = urb->status;
0de9a702
ON		 753 int i;
754
cdc97792 755 mos7840_port = urb->context;
0de9a702
ON		 756 spin_lock(&mos7840_port->pool_lock);
757 for (i = 0; i < NUM_URBS; i++) {
758 if (urb == mos7840_port->write_urb_pool[i]) {
759 mos7840_port->busy[i] = 0;
760 break;
761 }
762 }
763 spin_unlock(&mos7840_port->pool_lock);
764
0643c724
GKH		 765 if (status) {
766 dbg("nonzero write bulk status received:%d\n", status);
3f542974
PS		 767 return;
768 }
769
441b62c1 770 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
3f542974
PS		 771 dbg("%s", "Port Paranoia failed \n");
772 return;
773 }
774
775 dbg("%s \n", "Entering .........");
776
4a90f09b 777 tty = tty_port_tty_get(&mos7840_port->port->port);
b963a844
JS		 778 if (tty && mos7840_port->open)
779 tty_wakeup(tty);
4a90f09b 780 tty_kref_put(tty);
3f542974
PS		 781
782}
783
784/************************************************************************/
785/* 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 */
786/************************************************************************/
787#ifdef MCSSerialProbe
788static int mos7840_serial_probe(struct usb_serial *serial,
789 const struct usb_device_id *id)
790{
791
792 /*need to implement the mode_reg reading and updating\
793 structures usb_serial_ device_type\
794 (i.e num_ports, num_bulkin,bulkout etc) */
795 /* Also we can update the changes attach */
796 return 1;
797}
798#endif
799
800/*****************************************************************************
801 * mos7840_open
802 * this function is called by the tty driver when a port is opened
803 * If successful, we return 0
804 * Otherwise we return a negative error number.
805 *****************************************************************************/
806
95da310e
AC		 807static int mos7840_open(struct tty_struct *tty,
808 struct usb_serial_port *port, struct file *filp)
3f542974
PS		 809{
810 int response;
811 int j;
812 struct usb_serial *serial;
813 struct urb *urb;
814 __u16 Data;
815 int status;
816 struct moschip_port *mos7840_port;
0de9a702 817 struct moschip_port *port0;
3f542974 818
441b62c1 819 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 820 dbg("%s", "Port Paranoia failed \n");
821 return -ENODEV;
822 }
823
3f542974
PS		 824 serial = port->serial;
825
441b62c1 826 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 827 dbg("%s", "Serial Paranoia failed \n");
828 return -ENODEV;
829 }
830
831 mos7840_port = mos7840_get_port_private(port);
0de9a702 832 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 833
0de9a702 834 if (mos7840_port == NULL || port0 == NULL)
3f542974
PS		 835 return -ENODEV;
836
837 usb_clear_halt(serial->dev, port->write_urb->pipe);
838 usb_clear_halt(serial->dev, port->read_urb->pipe);
0de9a702 839 port0->open_ports++;
3f542974
PS		 840
841 /* Initialising the write urb pool */
842 for (j = 0; j < NUM_URBS; ++j) {
0de9a702 843 urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974
PS		 844 mos7840_port->write_urb_pool[j] = urb;
845
846 if (urb == NULL) {
194343d9 847 dev_err(&port->dev, "No more urbs???\n");
3f542974
PS		 848 continue;
849 }
850
880af9db
AC		 851 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
852 GFP_KERNEL);
3f542974 853 if (!urb->transfer_buffer) {
0de9a702
ON		 854 usb_free_urb(urb);
855 mos7840_port->write_urb_pool[j] = NULL;
194343d9
GKH		 856 dev_err(&port->dev,
857 "%s-out of memory for urb buffers.\n",
858 __func__);
3f542974
PS		 859 continue;
860 }
861 }
862
863/*****************************************************************************
864 * Initialize MCS7840 -- Write Init values to corresponding Registers
865 *
866 * Register Index
867 * 1 : IER
868 * 2 : FCR
869 * 3 : LCR
870 * 4 : MCR
871 *
872 * 0x08 : SP1/2 Control Reg
873 *****************************************************************************/
874
880af9db 875 /* NEED to check the following Block */
3f542974 876
3f542974
PS		 877 Data = 0x0;
878 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
879 if (status < 0) {
880 dbg("Reading Spreg failed\n");
881 return -1;
882 }
883 Data |= 0x80;
884 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
885 if (status < 0) {
886 dbg("writing Spreg failed\n");
887 return -1;
888 }
889
890 Data &= ~0x80;
891 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
892 if (status < 0) {
893 dbg("writing Spreg failed\n");
894 return -1;
895 }
880af9db 896 /* End of block to be checked */
3f542974 897
3f542974 898 Data = 0x0;
880af9db
AC		 899 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
900 &Data);
3f542974
PS		 901 if (status < 0) {
902 dbg("Reading Controlreg failed\n");
903 return -1;
904 }
880af9db
AC		 905 Data |= 0x08; /* Driver done bit */
906 Data |= 0x20; /* rx_disable */
907 status = mos7840_set_reg_sync(port,
908 mos7840_port->ControlRegOffset, Data);
3f542974
PS		 909 if (status < 0) {
910 dbg("writing Controlreg failed\n");
911 return -1;
912 }
880af9db
AC		 913 /* do register settings here */
914 /* Set all regs to the device default values. */
915 /***********************************
916 * First Disable all interrupts.
917 ***********************************/
3f542974 918 Data = 0x00;
3f542974
PS		 919 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
920 if (status < 0) {
921 dbg("disableing interrupts failed\n");
922 return -1;
923 }
880af9db 924 /* Set FIFO_CONTROL_REGISTER to the default value */
3f542974 925 Data = 0x00;
3f542974
PS		 926 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
927 if (status < 0) {
928 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
929 return -1;
930 }
931
932 Data = 0xcf;
3f542974
PS		 933 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
934 if (status < 0) {
935 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
936 return -1;
937 }
938
939 Data = 0x03;
3f542974
PS		 940 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
941 mos7840_port->shadowLCR = Data;
942
943 Data = 0x0b;
3f542974
PS		 944 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
945 mos7840_port->shadowMCR = Data;
946
947 Data = 0x00;
3f542974
PS		 948 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
949 mos7840_port->shadowLCR = Data;
950
880af9db 951 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 952 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
953
954 Data = 0x0c;
3f542974
PS		 955 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
956
957 Data = 0x0;
3f542974
PS		 958 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
959
960 Data = 0x00;
3f542974
PS		 961 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
962
963 Data = Data & ~SERIAL_LCR_DLAB;
3f542974
PS		 964 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
965 mos7840_port->shadowLCR = Data;
966
880af9db 967 /* clearing Bulkin and Bulkout Fifo */
3f542974 968 Data = 0x0;
3f542974
PS		 969 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
970
971 Data = Data | 0x0c;
3f542974
PS		 972 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
973
974 Data = Data & ~0x0c;
3f542974 975 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
880af9db 976 /* Finally enable all interrupts */
3f542974 977 Data = 0x0c;
3f542974
PS		 978 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
979
880af9db 980 /* clearing rx_disable */
3f542974 981 Data = 0x0;
880af9db
AC		 982 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
983 &Data);
3f542974 984 Data = Data & ~0x20;
880af9db
AC		 985 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
986 Data);
3f542974 987
880af9db 988 /* rx_negate */
3f542974 989 Data = 0x0;
880af9db
AC		 990 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
991 &Data);
3f542974 992 Data = Data | 0x10;
880af9db
AC		 993 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
994 Data);
3f542974
PS		 995
996 /* force low_latency on so that our tty_push actually forces *
997 * the data through,otherwise it is scheduled, and with *
998 * high data rates (like with OHCI) data can get lost. */
95da310e
AC		 999 if (tty)
1000 tty->low_latency = 1;
880af9db
AC		 1001
1002 /* Check to see if we've set up our endpoint info yet *
1003 * (can't set it up in mos7840_startup as the structures *
1004 * were not set up at that time.) */
0de9a702 1005 if (port0->open_ports == 1) {
3f542974 1006 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1007 /* set up interrupt urb */
3f542974 1008 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1009 serial->dev,
1010 usb_rcvintpipe(serial->dev,
1011 serial->port[0]->interrupt_in_endpointAddress),
1012 serial->port[0]->interrupt_in_buffer,
1013 serial->port[0]->interrupt_in_urb->
1014 transfer_buffer_length,
1015 mos7840_interrupt_callback,
1016 serial,
1017 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1018
1019 /* start interrupt read for mos7840 *
1020 * will continue as long as mos7840 is connected */
1021
1022 response =
1023 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1024 GFP_KERNEL);
1025 if (response) {
194343d9
GKH		 1026 dev_err(&port->dev, "%s - Error %d submitting "
1027 "interrupt urb\n", __func__, response);
3f542974
PS		 1028 }
1029
1030 }
1031
1032 }
1033
1034 /* see if we've set up our endpoint info yet *
1035 * (can't set it up in mos7840_startup as the *
1036 * structures were not set up at that time.) */
1037
1038 dbg("port number is %d \n", port->number);
1039 dbg("serial number is %d \n", port->serial->minor);
1040 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress);
1041 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress);
1042 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress);
1043 dbg("port's number in the device is %d\n", mos7840_port->port_num);
1044 mos7840_port->read_urb = port->read_urb;
1045
1046 /* set up our bulk in urb */
1047
1048 usb_fill_bulk_urb(mos7840_port->read_urb,
1049 serial->dev,
1050 usb_rcvbulkpipe(serial->dev,
1051 port->bulk_in_endpointAddress),
1052 port->bulk_in_buffer,
1053 mos7840_port->read_urb->transfer_buffer_length,
1054 mos7840_bulk_in_callback, mos7840_port);
1055
1056 dbg("mos7840_open: bulkin endpoint is %d\n",
1057 port->bulk_in_endpointAddress);
1058 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1059 if (response) {
194343d9
GKH		 1060 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1061 __func__, response);
3f542974
PS		 1062 }
1063
1064 /* initialize our wait queues */
1065 init_waitqueue_head(&mos7840_port->wait_chase);
1066 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1067
1068 /* initialize our icount structure */
1069 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1070
1071 /* initialize our port settings */
880af9db
AC		 1072 /* Must set to enable ints! */
1073 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1074 /* send a open port command */
1075 mos7840_port->open = 1;
880af9db 1076 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974
PS		 1077 mos7840_port->icount.tx = 0;
1078 mos7840_port->icount.rx = 0;
1079
880af9db
AC		 1080 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n",
1081 serial, mos7840_port, port);
3f542974
PS		 1082
1083 return 0;
1084
1085}
1086
1087/*****************************************************************************
1088 * mos7840_chars_in_buffer
1089 * this function is called by the tty driver when it wants to know how many
1090 * bytes of data we currently have outstanding in the port (data that has
1091 * been written, but hasn't made it out the port yet)
1092 * If successful, we return the number of bytes left to be written in the
1093 * system,
95da310e 1094 * Otherwise we return zero.
3f542974
PS		 1095 *****************************************************************************/
1096
95da310e 1097static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1098{
95da310e 1099 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1100 int i;
1101 int chars = 0;
0de9a702 1102 unsigned long flags;
3f542974
PS		 1103 struct moschip_port *mos7840_port;
1104
1105 dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
1106
441b62c1 1107 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974 1108 dbg("%s", "Invalid port \n");
95da310e 1109 return 0;
3f542974
PS		 1110 }
1111
1112 mos7840_port = mos7840_get_port_private(port);
1113 if (mos7840_port == NULL) {
1114 dbg("%s \n", "mos7840_break:leaving ...........");
95da310e 1115 return 0;
3f542974
PS		 1116 }
1117
880af9db 1118 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
95da310e
AC		 1119 for (i = 0; i < NUM_URBS; ++i)
1120 if (mos7840_port->busy[i])
3f542974 1121 chars += URB_TRANSFER_BUFFER_SIZE;
880af9db 1122 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
441b62c1 1123 dbg("%s - returns %d", __func__, chars);
0de9a702 1124 return chars;
3f542974
PS		 1125
1126}
1127
1128/************************************************************************
1129 *
1130 * mos7840_block_until_tx_empty
1131 *
1132 * This function will block the close until one of the following:
1133 * 1. TX count are 0
1134 * 2. The mos7840 has stopped
dc0d5c1e 1135 * 3. A timeout of 3 seconds without activity has expired
3f542974
PS		 1136 *
1137 ************************************************************************/
95da310e
AC		 1138static void mos7840_block_until_tx_empty(struct tty_struct *tty,
1139 struct moschip_port *mos7840_port)
3f542974
PS		 1140{
1141 int timeout = HZ / 10;
1142 int wait = 30;
1143 int count;
1144
1145 while (1) {
1146
95da310e 1147 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1148
1149 /* Check for Buffer status */
880af9db 1150 if (count <= 0)
3f542974 1151 return;
3f542974
PS		 1152
1153 /* Block the thread for a while */
1154 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1155 timeout);
1156
1157 /* No activity.. count down section */
1158 wait--;
1159 if (wait == 0) {
441b62c1 1160 dbg("%s - TIMEOUT", __func__);
3f542974
PS		 1161 return;
1162 } else {
dc0d5c1e 1163 /* Reset timeout value back to seconds */
3f542974
PS		 1164 wait = 30;
1165 }
1166 }
1167}
1168
1169/*****************************************************************************
1170 * mos7840_close
1171 * this function is called by the tty driver when a port is closed
1172 *****************************************************************************/
1173
95da310e
AC		 1174static void mos7840_close(struct tty_struct *tty,
1175 struct usb_serial_port *port, struct file *filp)
3f542974
PS		 1176{
1177 struct usb_serial *serial;
1178 struct moschip_port *mos7840_port;
0de9a702 1179 struct moschip_port *port0;
3f542974
PS		 1180 int j;
1181 __u16 Data;
1182
1183 dbg("%s\n", "mos7840_close:entering...");
1184
441b62c1 1185 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1186 dbg("%s", "Port Paranoia failed \n");
1187 return;
1188 }
1189
441b62c1 1190 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 1191 if (!serial) {
1192 dbg("%s", "Serial Paranoia failed \n");
1193 return;
1194 }
1195
1196 mos7840_port = mos7840_get_port_private(port);
0de9a702 1197 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1198
0de9a702 1199 if (mos7840_port == NULL || port0 == NULL)
3f542974 1200 return;
3f542974
PS		 1201
1202 for (j = 0; j < NUM_URBS; ++j)
1203 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1204
1205 /* Freeing Write URBs */
1206 for (j = 0; j < NUM_URBS; ++j) {
1207 if (mos7840_port->write_urb_pool[j]) {
1208 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1209 kfree(mos7840_port->write_urb_pool[j]->
1210 transfer_buffer);
1211
1212 usb_free_urb(mos7840_port->write_urb_pool[j]);
1213 }
1214 }
1215
95da310e 1216 if (serial->dev)
3f542974 1217 /* flush and block until tx is empty */
95da310e 1218 mos7840_block_until_tx_empty(tty, mos7840_port);
3f542974
PS		 1219
1220 /* While closing port, shutdown all bulk read, write *
1221 * and interrupt read if they exists */
1222 if (serial->dev) {
3f542974
PS		 1223 if (mos7840_port->write_urb) {
1224 dbg("%s", "Shutdown bulk write\n");
1225 usb_kill_urb(mos7840_port->write_urb);
1226 }
3f542974
PS		 1227 if (mos7840_port->read_urb) {
1228 dbg("%s", "Shutdown bulk read\n");
1229 usb_kill_urb(mos7840_port->read_urb);
1230 }
1231 if ((&mos7840_port->control_urb)) {
1232 dbg("%s", "Shutdown control read\n");
880af9db 1233 /*/ usb_kill_urb (mos7840_port->control_urb); */
3f542974
PS		 1234 }
1235 }
880af9db
AC		 1236/* if(mos7840_port->ctrl_buf != NULL) */
1237/* kfree(mos7840_port->ctrl_buf); */
0de9a702 1238 port0->open_ports--;
3f542974 1239 dbg("mos7840_num_open_ports in close%d:in port%d\n",
0de9a702
ON		 1240 port0->open_ports, port->number);
1241 if (port0->open_ports == 0) {
3f542974
PS		 1242 if (serial->port[0]->interrupt_in_urb) {
1243 dbg("%s", "Shutdown interrupt_in_urb\n");
0de9a702 1244 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1245 }
1246 }
1247
1248 if (mos7840_port->write_urb) {
1249 /* if this urb had a transfer buffer already (old tx) free it */
880af9db 1250 if (mos7840_port->write_urb->transfer_buffer != NULL)
3f542974 1251 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1252 usb_free_urb(mos7840_port->write_urb);
1253 }
1254
1255 Data = 0x0;
1256 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1257
1258 Data = 0x00;
1259 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1260
1261 mos7840_port->open = 0;
1262
1263 dbg("%s \n", "Leaving ............");
1264}
1265
1266/************************************************************************
1267 *
1268 * mos7840_block_until_chase_response
1269 *
1270 * This function will block the close until one of the following:
1271 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1272 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1273 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1274 *
1275 ************************************************************************/
1276
95da310e
AC		 1277static void mos7840_block_until_chase_response(struct tty_struct *tty,
1278 struct moschip_port *mos7840_port)
3f542974
PS		 1279{
1280 int timeout = 1 * HZ;
1281 int wait = 10;
1282 int count;
1283
1284 while (1) {
95da310e 1285 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1286
1287 /* Check for Buffer status */
880af9db 1288 if (count <= 0)
3f542974 1289 return;
3f542974
PS		 1290
1291 /* Block the thread for a while */
1292 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1293 timeout);
1294 /* No activity.. count down section */
1295 wait--;
1296 if (wait == 0) {
441b62c1 1297 dbg("%s - TIMEOUT", __func__);
3f542974
PS		 1298 return;
1299 } else {
dc0d5c1e 1300 /* Reset timeout value back to seconds */
3f542974
PS		 1301 wait = 10;
1302 }
1303 }
1304
1305}
1306
1307/*****************************************************************************
1308 * mos7840_break
1309 * this function sends a break to the port
1310 *****************************************************************************/
95da310e 1311static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1312{
95da310e 1313 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1314 unsigned char data;
1315 struct usb_serial *serial;
1316 struct moschip_port *mos7840_port;
1317
1318 dbg("%s \n", "Entering ...........");
1319 dbg("mos7840_break: Start\n");
1320
441b62c1 1321 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1322 dbg("%s", "Port Paranoia failed \n");
1323 return;
1324 }
1325
441b62c1 1326 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 1327 if (!serial) {
1328 dbg("%s", "Serial Paranoia failed \n");
1329 return;
1330 }
1331
1332 mos7840_port = mos7840_get_port_private(port);
1333
880af9db 1334 if (mos7840_port == NULL)
3f542974 1335 return;
3f542974 1336
95da310e 1337 if (serial->dev)
3f542974 1338 /* flush and block until tx is empty */
95da310e 1339 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1340
95da310e 1341 if (break_state == -1)
3f542974 1342 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1343 else
3f542974 1344 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974
PS		 1345
1346 mos7840_port->shadowLCR = data;
1347 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
1348 mos7840_port->shadowLCR);
1349 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1350 mos7840_port->shadowLCR);
1351
1352 return;
1353}
1354
1355/*****************************************************************************
1356 * mos7840_write_room
1357 * this function is called by the tty driver when it wants to know how many
1358 * bytes of data we can accept for a specific port.
1359 * If successful, we return the amount of room that we have for this port
1360 * Otherwise we return a negative error number.
1361 *****************************************************************************/
1362
95da310e 1363static int mos7840_write_room(struct tty_struct *tty)
3f542974 1364{
95da310e 1365 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1366 int i;
1367 int room = 0;
0de9a702 1368 unsigned long flags;
3f542974
PS		 1369 struct moschip_port *mos7840_port;
1370
1371 dbg("%s \n", " mos7840_write_room:entering ...........");
1372
441b62c1 1373 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1374 dbg("%s", "Invalid port \n");
1375 dbg("%s \n", " mos7840_write_room:leaving ...........");
1376 return -1;
1377 }
1378
1379 mos7840_port = mos7840_get_port_private(port);
1380 if (mos7840_port == NULL) {
1381 dbg("%s \n", "mos7840_break:leaving ...........");
1382 return -1;
1383 }
1384
0de9a702 1385 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1386 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1387 if (!mos7840_port->busy[i])
3f542974 1388 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1389 }
0de9a702 1390 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1391
0de9a702 1392 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
441b62c1 1393 dbg("%s - returns %d", __func__, room);
0de9a702 1394 return room;
3f542974
PS		 1395
1396}
1397
1398/*****************************************************************************
1399 * mos7840_write
1400 * this function is called by the tty driver when data should be written to
1401 * the port.
1402 * If successful, we return the number of bytes written, otherwise we
1403 * return a negative error number.
1404 *****************************************************************************/
1405
95da310e 1406static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1407 const unsigned char *data, int count)
1408{
1409 int status;
1410 int i;
1411 int bytes_sent = 0;
1412 int transfer_size;
0de9a702 1413 unsigned long flags;
3f542974
PS		 1414
1415 struct moschip_port *mos7840_port;
1416 struct usb_serial *serial;
1417 struct urb *urb;
880af9db 1418 /* __u16 Data; */
3f542974
PS		 1419 const unsigned char *current_position = data;
1420 unsigned char *data1;
1421 dbg("%s \n", "entering ...........");
880af9db
AC		 1422 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1423 mos7840_port->shadowLCR); */
3f542974
PS		 1424
1425#ifdef NOTMOS7840
1426 Data = 0x00;
3f542974
PS		 1427 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1428 mos7840_port->shadowLCR = Data;
1429 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
1430 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1431 mos7840_port->shadowLCR);
1432
880af9db
AC		 1433 /* Data = 0x03; */
1434 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1435 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1436
880af9db 1437 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1438 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1439
880af9db
AC		 1440 /* Data = 0x0c; */
1441 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1442 Data = 0x00;
3f542974
PS		 1443 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1444 dbg("mos7840_write:DLL value is %x\n", Data);
1445
1446 Data = 0x0;
3f542974
PS		 1447 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1448 dbg("mos7840_write:DLM value is %x\n", Data);
1449
1450 Data = Data & ~SERIAL_LCR_DLAB;
1451 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1452 mos7840_port->shadowLCR);
3f542974
PS		 1453 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1454#endif
1455
441b62c1 1456 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1457 dbg("%s", "Port Paranoia failed \n");
1458 return -1;
1459 }
1460
1461 serial = port->serial;
441b62c1 1462 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 1463 dbg("%s", "Serial Paranoia failed \n");
1464 return -1;
1465 }
1466
1467 mos7840_port = mos7840_get_port_private(port);
1468 if (mos7840_port == NULL) {
1469 dbg("%s", "mos7840_port is NULL\n");
1470 return -1;
1471 }
1472
1473 /* try to find a free urb in the list */
1474 urb = NULL;
1475
0de9a702 1476 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1477 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1478 if (!mos7840_port->busy[i]) {
1479 mos7840_port->busy[i] = 1;
3f542974
PS		 1480 urb = mos7840_port->write_urb_pool[i];
1481 dbg("\nURB:%d", i);
1482 break;
1483 }
1484 }
0de9a702 1485 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1486
1487 if (urb == NULL) {
441b62c1 1488 dbg("%s - no more free urbs", __func__);
3f542974
PS		 1489 goto exit;
1490 }
1491
1492 if (urb->transfer_buffer == NULL) {
1493 urb->transfer_buffer =
1494 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1495
1496 if (urb->transfer_buffer == NULL) {
194343d9
GKH		 1497 dev_err(&port->dev, "%s no more kernel memory...\n",
1498 __func__);
3f542974
PS		 1499 goto exit;
1500 }
1501 }
1502 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1503
97c4965d 1504 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1505
1506 /* fill urb with data and submit */
1507 usb_fill_bulk_urb(urb,
1508 serial->dev,
1509 usb_sndbulkpipe(serial->dev,
1510 port->bulk_out_endpointAddress),
1511 urb->transfer_buffer,
1512 transfer_size,
1513 mos7840_bulk_out_data_callback, mos7840_port);
1514
1515 data1 = urb->transfer_buffer;
1516 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress);
1517
1518 /* send it down the pipe */
1519 status = usb_submit_urb(urb, GFP_ATOMIC);
1520
1521 if (status) {
0de9a702 1522 mos7840_port->busy[i] = 0;
194343d9
GKH		 1523 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1524 "with status = %d\n", __func__, status);
3f542974
PS		 1525 bytes_sent = status;
1526 goto exit;
1527 }
1528 bytes_sent = transfer_size;
1529 mos7840_port->icount.tx += transfer_size;
0de9a702 1530 smp_wmb();
3f542974 1531 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
95da310e 1532exit:
3f542974
PS		 1533 return bytes_sent;
1534
1535}
1536
1537/*****************************************************************************
1538 * mos7840_throttle
1539 * this function is called by the tty driver when it wants to stop the data
1540 * being read from the port.
1541 *****************************************************************************/
1542
95da310e 1543static void mos7840_throttle(struct tty_struct *tty)
3f542974 1544{
95da310e 1545 struct usb_serial_port *port = tty->driver_data;
3f542974 1546 struct moschip_port *mos7840_port;
3f542974
PS		 1547 int status;
1548
441b62c1 1549 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1550 dbg("%s", "Invalid port \n");
1551 return;
1552 }
1553
1554 dbg("- port %d\n", port->number);
1555
1556 mos7840_port = mos7840_get_port_private(port);
1557
1558 if (mos7840_port == NULL)
1559 return;
1560
1561 if (!mos7840_port->open) {
1562 dbg("%s\n", "port not opened");
1563 return;
1564 }
1565
1566 dbg("%s", "Entering .......... \n");
1567
3f542974
PS		 1568 /* if we are implementing XON/XOFF, send the stop character */
1569 if (I_IXOFF(tty)) {
1570 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1571 status = mos7840_write(tty, port, &stop_char, 1);
1572 if (status <= 0)
3f542974 1573 return;
3f542974 1574 }
3f542974
PS		 1575 /* if we are implementing RTS/CTS, toggle that line */
1576 if (tty->termios->c_cflag & CRTSCTS) {
1577 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1578 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1579 mos7840_port->shadowMCR);
95da310e 1580 if (status < 0)
3f542974 1581 return;
3f542974
PS		 1582 }
1583
1584 return;
1585}
1586
1587/*****************************************************************************
1588 * mos7840_unthrottle
880af9db
AC		 1589 * this function is called by the tty driver when it wants to resume
1590 * the data being read from the port (called after mos7840_throttle is
1591 * called)
3f542974 1592 *****************************************************************************/
95da310e 1593static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1594{
95da310e 1595 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1596 int status;
1597 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1598
441b62c1 1599 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1600 dbg("%s", "Invalid port \n");
1601 return;
1602 }
1603
1604 if (mos7840_port == NULL)
1605 return;
1606
1607 if (!mos7840_port->open) {
441b62c1 1608 dbg("%s - port not opened", __func__);
3f542974
PS		 1609 return;
1610 }
1611
1612 dbg("%s", "Entering .......... \n");
1613
3f542974
PS		 1614 /* if we are implementing XON/XOFF, send the start character */
1615 if (I_IXOFF(tty)) {
1616 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1617 status = mos7840_write(tty, port, &start_char, 1);
1618 if (status <= 0)
3f542974 1619 return;
3f542974
PS		 1620 }
1621
1622 /* if we are implementing RTS/CTS, toggle that line */
1623 if (tty->termios->c_cflag & CRTSCTS) {
1624 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1625 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1626 mos7840_port->shadowMCR);
95da310e 1627 if (status < 0)
3f542974 1628 return;
3f542974 1629 }
3f542974
PS		 1630}
1631
95da310e 1632static int mos7840_tiocmget(struct tty_struct *tty, struct file *file)
3f542974 1633{
95da310e 1634 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1635 struct moschip_port *mos7840_port;
1636 unsigned int result;
1637 __u16 msr;
1638 __u16 mcr;
880af9db 1639 int status;
3f542974
PS		 1640 mos7840_port = mos7840_get_port_private(port);
1641
441b62c1 1642 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1643
1644 if (mos7840_port == NULL)
1645 return -ENODEV;
1646
1647 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1648 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1649 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1650 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1651 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1652 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1653 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1654 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1655 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1656
441b62c1 1657 dbg("%s - 0x%04X", __func__, result);
3f542974
PS		 1658
1659 return result;
1660}
1661
95da310e 1662static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
3f542974
PS		 1663 unsigned int set, unsigned int clear)
1664{
95da310e 1665 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1666 struct moschip_port *mos7840_port;
1667 unsigned int mcr;
87521c46 1668 int status;
3f542974 1669
441b62c1 1670 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1671
1672 mos7840_port = mos7840_get_port_private(port);
1673
1674 if (mos7840_port == NULL)
1675 return -ENODEV;
1676
e2984494 1677 /* FIXME: What locks the port registers ? */
3f542974
PS		 1678 mcr = mos7840_port->shadowMCR;
1679 if (clear & TIOCM_RTS)
1680 mcr &= ~MCR_RTS;
1681 if (clear & TIOCM_DTR)
1682 mcr &= ~MCR_DTR;
1683 if (clear & TIOCM_LOOP)
1684 mcr &= ~MCR_LOOPBACK;
1685
1686 if (set & TIOCM_RTS)
1687 mcr |= MCR_RTS;
1688 if (set & TIOCM_DTR)
1689 mcr |= MCR_DTR;
1690 if (set & TIOCM_LOOP)
1691 mcr |= MCR_LOOPBACK;
1692
1693 mos7840_port->shadowMCR = mcr;
1694
3f542974
PS		 1695 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1696 if (status < 0) {
1697 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
87521c46 1698 return status;
3f542974
PS		 1699 }
1700
1701 return 0;
1702}
1703
1704/*****************************************************************************
1705 * mos7840_calc_baud_rate_divisor
1706 * this function calculates the proper baud rate divisor for the specified
1707 * baud rate.
1708 *****************************************************************************/
1709static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
880af9db 1710 __u16 *clk_sel_val)
3f542974
PS		 1711{
1712
441b62c1 1713 dbg("%s - %d", __func__, baudRate);
3f542974
PS		 1714
1715 if (baudRate <= 115200) {
1716 *divisor = 115200 / baudRate;
1717 *clk_sel_val = 0x0;
1718 }
1719 if ((baudRate > 115200) && (baudRate <= 230400)) {
1720 *divisor = 230400 / baudRate;
1721 *clk_sel_val = 0x10;
1722 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1723 *divisor = 403200 / baudRate;
1724 *clk_sel_val = 0x20;
1725 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1726 *divisor = 460800 / baudRate;
1727 *clk_sel_val = 0x30;
1728 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1729 *divisor = 806400 / baudRate;
1730 *clk_sel_val = 0x40;
1731 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1732 *divisor = 921600 / baudRate;
1733 *clk_sel_val = 0x50;
1734 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1735 *divisor = 1572864 / baudRate;
1736 *clk_sel_val = 0x60;
1737 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1738 *divisor = 3145728 / baudRate;
1739 *clk_sel_val = 0x70;
1740 }
1741 return 0;
1742
1743#ifdef NOTMCS7840
1744
1745 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1746 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1747 *divisor = mos7840_divisor_table[i].Divisor;
1748 return 0;
1749 }
1750 }
1751
1752 /* After trying for all the standard baud rates *
1753 * Try calculating the divisor for this baud rate */
1754
1755 if (baudrate > 75 && baudrate < 230400) {
1756 /* get the divisor */
1757 custom = (__u16) (230400L / baudrate);
1758
1759 /* Check for round off */
1760 round1 = (__u16) (2304000L / baudrate);
1761 round = (__u16) (round1 - (custom * 10));
880af9db 1762 if (round > 4)
3f542974 1763 custom++;
3f542974
PS		 1764 *divisor = custom;
1765
1766 dbg(" Baud %d = %d\n", baudrate, custom);
1767 return 0;
1768 }
1769
1770 dbg("%s\n", " Baud calculation Failed...");
1771 return -1;
1772#endif
1773}
1774
1775/*****************************************************************************
1776 * mos7840_send_cmd_write_baud_rate
1777 * this function sends the proper command to change the baud rate of the
1778 * specified port.
1779 *****************************************************************************/
1780
1781static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1782 int baudRate)
1783{
1784 int divisor = 0;
1785 int status;
1786 __u16 Data;
1787 unsigned char number;
1788 __u16 clk_sel_val;
1789 struct usb_serial_port *port;
1790
1791 if (mos7840_port == NULL)
1792 return -1;
1793
1794 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 1795 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1796 dbg("%s", "Invalid port \n");
1797 return -1;
1798 }
1799
441b62c1 1800 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
3f542974
PS		 1801 dbg("%s", "Invalid Serial \n");
1802 return -1;
1803 }
1804
1805 dbg("%s", "Entering .......... \n");
1806
1807 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1808
441b62c1 1809 dbg("%s - port = %d, baud = %d", __func__,
3f542974 1810 mos7840_port->port->number, baudRate);
880af9db 1811 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1812 if (baudRate > 115200) {
1813#ifdef HW_flow_control
880af9db
AC		 1814 /* NOTE: need to see the pther register to modify */
1815 /* setting h/w flow control bit to 1 */
3f542974
PS		 1816 Data = 0x2b;
1817 mos7840_port->shadowMCR = Data;
880af9db
AC		 1818 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1819 Data);
3f542974
PS		 1820 if (status < 0) {
1821 dbg("Writing spreg failed in set_serial_baud\n");
1822 return -1;
1823 }
1824#endif
1825
1826 } else {
1827#ifdef HW_flow_control
880af9db 1828 / *setting h/w flow control bit to 0 */
3f542974
PS		 1829 Data = 0xb;
1830 mos7840_port->shadowMCR = Data;
880af9db
AC		 1831 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1832 Data);
3f542974
PS		 1833 if (status < 0) {
1834 dbg("Writing spreg failed in set_serial_baud\n");
1835 return -1;
1836 }
1837#endif
1838
1839 }
1840
880af9db 1841 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1842 clk_sel_val = 0x0;
1843 Data = 0x0;
880af9db 1844 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
3f542974 1845 &clk_sel_val);
880af9db
AC		 1846 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1847 &Data);
3f542974
PS		 1848 if (status < 0) {
1849 dbg("reading spreg failed in set_serial_baud\n");
1850 return -1;
1851 }
1852 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1853 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1854 Data);
3f542974
PS		 1855 if (status < 0) {
1856 dbg("Writing spreg failed in set_serial_baud\n");
1857 return -1;
1858 }
1859 /* Calculate the Divisor */
1860
1861 if (status) {
194343d9 1862 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1863 return status;
1864 }
1865 /* Enable access to divisor latch */
1866 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1867 mos7840_port->shadowLCR = Data;
1868 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1869
1870 /* Write the divisor */
1871 Data = (unsigned char)(divisor & 0xff);
1872 dbg("set_serial_baud Value to write DLL is %x\n", Data);
1873 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1874
1875 Data = (unsigned char)((divisor & 0xff00) >> 8);
1876 dbg("set_serial_baud Value to write DLM is %x\n", Data);
1877 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1878
1879 /* Disable access to divisor latch */
1880 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1881 mos7840_port->shadowLCR = Data;
1882 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1883
1884 }
3f542974
PS		 1885 return status;
1886}
1887
1888/*****************************************************************************
1889 * mos7840_change_port_settings
1890 * This routine is called to set the UART on the device to match
1891 * the specified new settings.
1892 *****************************************************************************/
1893
95da310e
AC		 1894static void mos7840_change_port_settings(struct tty_struct *tty,
1895 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1896{
3f542974
PS		 1897 int baud;
1898 unsigned cflag;
1899 unsigned iflag;
1900 __u8 lData;
1901 __u8 lParity;
1902 __u8 lStop;
1903 int status;
1904 __u16 Data;
1905 struct usb_serial_port *port;
1906 struct usb_serial *serial;
1907
1908 if (mos7840_port == NULL)
1909 return;
1910
1911 port = (struct usb_serial_port *)mos7840_port->port;
1912
441b62c1 1913 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1914 dbg("%s", "Invalid port \n");
1915 return;
1916 }
1917
441b62c1 1918 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
3f542974
PS		 1919 dbg("%s", "Invalid Serial \n");
1920 return;
1921 }
1922
1923 serial = port->serial;
1924
441b62c1 1925 dbg("%s - port %d", __func__, mos7840_port->port->number);
3f542974
PS		 1926
1927 if (!mos7840_port->open) {
441b62c1 1928 dbg("%s - port not opened", __func__);
3f542974
PS		 1929 return;
1930 }
1931
3f542974
PS		 1932 dbg("%s", "Entering .......... \n");
1933
1934 lData = LCR_BITS_8;
1935 lStop = LCR_STOP_1;
1936 lParity = LCR_PAR_NONE;
1937
1938 cflag = tty->termios->c_cflag;
1939 iflag = tty->termios->c_iflag;
1940
1941 /* Change the number of bits */
1942 if (cflag & CSIZE) {
1943 switch (cflag & CSIZE) {
1944 case CS5:
1945 lData = LCR_BITS_5;
1946 break;
1947
1948 case CS6:
1949 lData = LCR_BITS_6;
1950 break;
1951
1952 case CS7:
1953 lData = LCR_BITS_7;
1954 break;
1955 default:
1956 case CS8:
1957 lData = LCR_BITS_8;
1958 break;
1959 }
1960 }
1961 /* Change the Parity bit */
1962 if (cflag & PARENB) {
1963 if (cflag & PARODD) {
1964 lParity = LCR_PAR_ODD;
441b62c1 1965 dbg("%s - parity = odd", __func__);
3f542974
PS		 1966 } else {
1967 lParity = LCR_PAR_EVEN;
441b62c1 1968 dbg("%s - parity = even", __func__);
3f542974
PS		 1969 }
1970
1971 } else {
441b62c1 1972 dbg("%s - parity = none", __func__);
3f542974
PS		 1973 }
1974
880af9db 1975 if (cflag & CMSPAR)
3f542974 1976 lParity = lParity | 0x20;
3f542974
PS		 1977
1978 /* Change the Stop bit */
1979 if (cflag & CSTOPB) {
1980 lStop = LCR_STOP_2;
441b62c1 1981 dbg("%s - stop bits = 2", __func__);
3f542974
PS		 1982 } else {
1983 lStop = LCR_STOP_1;
441b62c1 1984 dbg("%s - stop bits = 1", __func__);
3f542974
PS		 1985 }
1986
1987 /* Update the LCR with the correct value */
1988 mos7840_port->shadowLCR &=
1989 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1990 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1991
1992 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
1993 mos7840_port->shadowLCR);
1994 /* Disable Interrupts */
1995 Data = 0x00;
1996 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1997
1998 Data = 0x00;
1999 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2000
2001 Data = 0xcf;
2002 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2003
2004 /* Send the updated LCR value to the mos7840 */
2005 Data = mos7840_port->shadowLCR;
2006
2007 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2008
2009 Data = 0x00b;
2010 mos7840_port->shadowMCR = Data;
2011 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2012 Data = 0x00b;
2013 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2014
2015 /* set up the MCR register and send it to the mos7840 */
2016
2017 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 2018 if (cflag & CBAUD)
3f542974 2019 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 2020
880af9db 2021 if (cflag & CRTSCTS)
3f542974 2022 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 2023 else
3f542974 2024 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 2025
2026 Data = mos7840_port->shadowMCR;
2027 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2028
2029 /* Determine divisor based on baud rate */
2030 baud = tty_get_baud_rate(tty);
2031
2032 if (!baud) {
2033 /* pick a default, any default... */
2034 dbg("%s\n", "Picked default baud...");
2035 baud = 9600;
2036 }
2037
441b62c1 2038 dbg("%s - baud rate = %d", __func__, baud);
3f542974
PS		 2039 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2040
2041 /* Enable Interrupts */
2042 Data = 0x0c;
2043 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2044
2045 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2046 mos7840_port->read_urb->dev = serial->dev;
2047
2048 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2049
2050 if (status) {
2051 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2052 status);
2053 }
2054 }
2055 wake_up(&mos7840_port->delta_msr_wait);
2056 mos7840_port->delta_msr_cond = 1;
2057 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
2058 mos7840_port->shadowLCR);
2059
2060 return;
2061}
2062
2063/*****************************************************************************
2064 * mos7840_set_termios
2065 * this function is called by the tty driver when it wants to change
2066 * the termios structure
2067 *****************************************************************************/
2068
95da310e
AC		 2069static void mos7840_set_termios(struct tty_struct *tty,
2070 struct usb_serial_port *port,
606d099c 2071 struct ktermios *old_termios)
3f542974
PS		 2072{
2073 int status;
2074 unsigned int cflag;
2075 struct usb_serial *serial;
2076 struct moschip_port *mos7840_port;
3f542974 2077 dbg("mos7840_set_termios: START\n");
441b62c1 2078 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2079 dbg("%s", "Invalid port \n");
2080 return;
2081 }
2082
2083 serial = port->serial;
2084
441b62c1 2085 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 2086 dbg("%s", "Invalid Serial \n");
2087 return;
2088 }
2089
2090 mos7840_port = mos7840_get_port_private(port);
2091
2092 if (mos7840_port == NULL)
2093 return;
2094
3f542974 2095 if (!mos7840_port->open) {
441b62c1 2096 dbg("%s - port not opened", __func__);
3f542974
PS		 2097 return;
2098 }
2099
2100 dbg("%s\n", "setting termios - ");
2101
2102 cflag = tty->termios->c_cflag;
2103
441b62c1 2104 dbg("%s - clfag %08x iflag %08x", __func__,
3f542974 2105 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
441b62c1 2106 dbg("%s - old clfag %08x old iflag %08x", __func__,
3d3ddce5 2107 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
441b62c1 2108 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 2109
2110 /* change the port settings to the new ones specified */
2111
95da310e 2112 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2113
2114 if (!mos7840_port->read_urb) {
2115 dbg("%s", "URB KILLED !!!!!\n");
2116 return;
2117 }
2118
2119 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2120 mos7840_port->read_urb->dev = serial->dev;
2121 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2122 if (status) {
2123 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2124 status);
2125 }
2126 }
2127 return;
2128}
2129
2130/*****************************************************************************
2131 * mos7840_get_lsr_info - get line status register info
2132 *
2133 * Purpose: Let user call ioctl() to get info when the UART physically
2134 * is emptied. On bus types like RS485, the transmitter must
2135 * release the bus after transmitting. This must be done when
2136 * the transmit shift register is empty, not be done when the
2137 * transmit holding register is empty. This functionality
2138 * allows an RS485 driver to be written in user space.
2139 *****************************************************************************/
2140
95da310e 2141static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2142 unsigned int __user *value)
3f542974
PS		 2143{
2144 int count;
2145 unsigned int result = 0;
2146
95da310e 2147 count = mos7840_chars_in_buffer(tty);
3f542974 2148 if (count == 0) {
441b62c1 2149 dbg("%s -- Empty", __func__);
3f542974
PS		 2150 result = TIOCSER_TEMT;
2151 }
2152
2153 if (copy_to_user(value, &result, sizeof(int)))
2154 return -EFAULT;
2155 return 0;
2156}
2157
3f542974
PS		 2158/*****************************************************************************
2159 * mos7840_set_modem_info
2160 * function to set modem info
2161 *****************************************************************************/
2162
95da310e
AC		 2163/* FIXME: Should be using the model control hooks */
2164
3f542974 2165static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
97c4965d 2166 unsigned int cmd, unsigned int __user *value)
3f542974
PS		 2167{
2168 unsigned int mcr;
2169 unsigned int arg;
2170 __u16 Data;
2171 int status;
2172 struct usb_serial_port *port;
2173
2174 if (mos7840_port == NULL)
2175 return -1;
2176
2177 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 2178 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2179 dbg("%s", "Invalid port \n");
2180 return -1;
2181 }
2182
2183 mcr = mos7840_port->shadowMCR;
2184
2185 if (copy_from_user(&arg, value, sizeof(int)))
2186 return -EFAULT;
2187
2188 switch (cmd) {
2189 case TIOCMBIS:
2190 if (arg & TIOCM_RTS)
2191 mcr |= MCR_RTS;
2192 if (arg & TIOCM_DTR)
2193 mcr |= MCR_RTS;
2194 if (arg & TIOCM_LOOP)
2195 mcr |= MCR_LOOPBACK;
2196 break;
2197
2198 case TIOCMBIC:
2199 if (arg & TIOCM_RTS)
2200 mcr &= ~MCR_RTS;
2201 if (arg & TIOCM_DTR)
2202 mcr &= ~MCR_RTS;
2203 if (arg & TIOCM_LOOP)
2204 mcr &= ~MCR_LOOPBACK;
2205 break;
2206
2207 case TIOCMSET:
2208 /* turn off the RTS and DTR and LOOPBACK
2209 * and then only turn on what was asked to */
2210 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK);
2211 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0);
2212 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0);
2213 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0);
2214 break;
2215 }
2216
2217 mos7840_port->shadowMCR = mcr;
2218
2219 Data = mos7840_port->shadowMCR;
3f542974
PS		 2220 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2221 if (status < 0) {
2222 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
2223 return -1;
2224 }
2225
2226 return 0;
2227}
2228
2229/*****************************************************************************
2230 * mos7840_get_modem_info
2231 * function to get modem info
2232 *****************************************************************************/
2233
2234static int mos7840_get_modem_info(struct moschip_port *mos7840_port,
97c4965d 2235 unsigned int __user *value)
3f542974
PS		 2236{
2237 unsigned int result = 0;
2238 __u16 msr;
2239 unsigned int mcr = mos7840_port->shadowMCR;
880af9db 2240 mos7840_get_uart_reg(mos7840_port->port,
95da310e 2241 MODEM_STATUS_REGISTER, &msr);
3f542974
PS		 2242 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
2243 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
2244 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
2245 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */
2246 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
2247 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
2248
441b62c1 2249 dbg("%s -- %x", __func__, result);
3f542974
PS		 2250
2251 if (copy_to_user(value, &result, sizeof(int)))
2252 return -EFAULT;
2253 return 0;
2254}
2255
2256/*****************************************************************************
2257 * mos7840_get_serial_info
2258 * function to get information about serial port
2259 *****************************************************************************/
2260
2261static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2262 struct serial_struct __user *retinfo)
3f542974
PS		 2263{
2264 struct serial_struct tmp;
2265
2266 if (mos7840_port == NULL)
2267 return -1;
2268
2269 if (!retinfo)
2270 return -EFAULT;
2271
2272 memset(&tmp, 0, sizeof(tmp));
2273
2274 tmp.type = PORT_16550A;
2275 tmp.line = mos7840_port->port->serial->minor;
2276 tmp.port = mos7840_port->port->number;
2277 tmp.irq = 0;
2278 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2279 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2280 tmp.baud_base = 9600;
2281 tmp.close_delay = 5 * HZ;
2282 tmp.closing_wait = 30 * HZ;
2283
2284 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2285 return -EFAULT;
2286 return 0;
2287}
2288
2289/*****************************************************************************
2290 * SerialIoctl
2291 * this function handles any ioctl calls to the driver
2292 *****************************************************************************/
2293
95da310e 2294static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
3f542974
PS		 2295 unsigned int cmd, unsigned long arg)
2296{
95da310e 2297 struct usb_serial_port *port = tty->driver_data;
97c4965d 2298 void __user *argp = (void __user *)arg;
3f542974 2299 struct moschip_port *mos7840_port;
3f542974
PS		 2300
2301 struct async_icount cnow;
2302 struct async_icount cprev;
2303 struct serial_icounter_struct icount;
2304 int mosret = 0;
3f542974 2305
441b62c1 2306 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2307 dbg("%s", "Invalid port \n");
2308 return -1;
2309 }
2310
2311 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2312
2313 if (mos7840_port == NULL)
2314 return -1;
2315
441b62c1 2316 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
3f542974
PS		 2317
2318 switch (cmd) {
2319 /* return number of bytes available */
2320
3f542974 2321 case TIOCSERGETLSR:
441b62c1 2322 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
95da310e 2323 return mos7840_get_lsr_info(tty, argp);
3f542974
PS		 2324 return 0;
2325
95da310e 2326 /* FIXME: use the modem hooks and remove this */
3f542974
PS		 2327 case TIOCMBIS:
2328 case TIOCMBIC:
2329 case TIOCMSET:
441b62c1 2330 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__,
3f542974
PS		 2331 port->number);
2332 mosret =
97c4965d 2333 mos7840_set_modem_info(mos7840_port, cmd, argp);
3f542974
PS		 2334 return mosret;
2335
2336 case TIOCMGET:
441b62c1 2337 dbg("%s (%d) TIOCMGET", __func__, port->number);
97c4965d 2338 return mos7840_get_modem_info(mos7840_port, argp);
3f542974
PS		 2339
2340 case TIOCGSERIAL:
441b62c1 2341 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
97c4965d 2342 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2343
2344 case TIOCSSERIAL:
441b62c1 2345 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
3f542974
PS		 2346 break;
2347
2348 case TIOCMIWAIT:
441b62c1 2349 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
3f542974
PS		 2350 cprev = mos7840_port->icount;
2351 while (1) {
880af9db 2352 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974
PS		 2353 mos7840_port->delta_msr_cond = 0;
2354 wait_event_interruptible(mos7840_port->delta_msr_wait,
2355 (mos7840_port->
2356 delta_msr_cond == 1));
2357
2358 /* see if a signal did it */
2359 if (signal_pending(current))
2360 return -ERESTARTSYS;
2361 cnow = mos7840_port->icount;
0de9a702 2362 smp_rmb();
3f542974
PS		 2363 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2364 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2365 return -EIO; /* no change => error */
2366 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2367 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2368 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2369 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2370 return 0;
2371 }
2372 cprev = cnow;
2373 }
2374 /* NOTREACHED */
2375 break;
2376
2377 case TIOCGICOUNT:
2378 cnow = mos7840_port->icount;
0de9a702 2379 smp_rmb();
3f542974
PS		 2380 icount.cts = cnow.cts;
2381 icount.dsr = cnow.dsr;
2382 icount.rng = cnow.rng;
2383 icount.dcd = cnow.dcd;
2384 icount.rx = cnow.rx;
2385 icount.tx = cnow.tx;
2386 icount.frame = cnow.frame;
2387 icount.overrun = cnow.overrun;
2388 icount.parity = cnow.parity;
2389 icount.brk = cnow.brk;
2390 icount.buf_overrun = cnow.buf_overrun;
2391
441b62c1 2392 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
3f542974 2393 port->number, icount.rx, icount.tx);
97c4965d 2394 if (copy_to_user(argp, &icount, sizeof(icount)))
3f542974
PS		 2395 return -EFAULT;
2396 return 0;
3f542974
PS		 2397 default:
2398 break;
2399 }
3f542974
PS		 2400 return -ENOIOCTLCMD;
2401}
2402
2403static int mos7840_calc_num_ports(struct usb_serial *serial)
2404{
0de9a702 2405 int mos7840_num_ports = 0;
3f542974
PS		 2406
2407 dbg("numberofendpoints: %d \n",
2408 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
2409 dbg("numberofendpoints: %d \n",
2410 (int)serial->interface->altsetting->desc.bNumEndpoints);
2411 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
0de9a702 2412 mos7840_num_ports = serial->num_ports = 2;
3f542974 2413 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
0de9a702
ON		 2414 serial->num_bulk_in = 4;
2415 serial->num_bulk_out = 4;
2416 mos7840_num_ports = serial->num_ports = 4;
3f542974
PS		 2417 }
2418
2419 return mos7840_num_ports;
2420}
2421
2422/****************************************************************************
2423 * mos7840_startup
2424 ****************************************************************************/
2425
2426static int mos7840_startup(struct usb_serial *serial)
2427{
2428 struct moschip_port *mos7840_port;
2429 struct usb_device *dev;
2430 int i, status;
2431
2432 __u16 Data;
2433 dbg("%s \n", " mos7840_startup :entering..........");
2434
2435 if (!serial) {
2436 dbg("%s\n", "Invalid Handler");
2437 return -1;
2438 }
2439
2440 dev = serial->dev;
2441
2442 dbg("%s\n", "Entering...");
2443
2444 /* we set up the pointers to the endpoints in the mos7840_open *
2445 * function, as the structures aren't created yet. */
2446
2447 /* set up port private structures */
2448 for (i = 0; i < serial->num_ports; ++i) {
7ac9da10 2449 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
3f542974 2450 if (mos7840_port == NULL) {
194343d9 2451 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
0de9a702
ON		 2452 status = -ENOMEM;
2453 i--; /* don't follow NULL pointer cleaning up */
2454 goto error;
3f542974 2455 }
3f542974 2456
880af9db
AC		 2457 /* Initialize all port interrupt end point to port 0 int
2458 * endpoint. Our device has only one interrupt end point
2459 * common to all port */
3f542974
PS		 2460
2461 mos7840_port->port = serial->port[i];
2462 mos7840_set_port_private(serial->port[i], mos7840_port);
0de9a702 2463 spin_lock_init(&mos7840_port->pool_lock);
3f542974
PS		 2464
2465 mos7840_port->port_num = ((serial->port[i]->number -
2466 (serial->port[i]->serial->minor)) +
2467 1);
2468
2469 if (mos7840_port->port_num == 1) {
2470 mos7840_port->SpRegOffset = 0x0;
2471 mos7840_port->ControlRegOffset = 0x1;
2472 mos7840_port->DcrRegOffset = 0x4;
2473 } else if ((mos7840_port->port_num == 2)
0de9a702 2474 && (serial->num_ports == 4)) {
3f542974
PS		 2475 mos7840_port->SpRegOffset = 0x8;
2476 mos7840_port->ControlRegOffset = 0x9;
2477 mos7840_port->DcrRegOffset = 0x16;
2478 } else if ((mos7840_port->port_num == 2)
0de9a702 2479 && (serial->num_ports == 2)) {
3f542974
PS		 2480 mos7840_port->SpRegOffset = 0xa;
2481 mos7840_port->ControlRegOffset = 0xb;
2482 mos7840_port->DcrRegOffset = 0x19;
2483 } else if ((mos7840_port->port_num == 3)
0de9a702 2484 && (serial->num_ports == 4)) {
3f542974
PS		 2485 mos7840_port->SpRegOffset = 0xa;
2486 mos7840_port->ControlRegOffset = 0xb;
2487 mos7840_port->DcrRegOffset = 0x19;
2488 } else if ((mos7840_port->port_num == 4)
0de9a702 2489 && (serial->num_ports == 4)) {
3f542974
PS		 2490 mos7840_port->SpRegOffset = 0xc;
2491 mos7840_port->ControlRegOffset = 0xd;
2492 mos7840_port->DcrRegOffset = 0x1c;
2493 }
2494 mos7840_dump_serial_port(mos7840_port);
3f542974
PS		 2495 mos7840_set_port_private(serial->port[i], mos7840_port);
2496
880af9db
AC		 2497 /* enable rx_disable bit in control register */
2498 status = mos7840_get_reg_sync(serial->port[i],
2499 mos7840_port->ControlRegOffset, &Data);
3f542974
PS		 2500 if (status < 0) {
2501 dbg("Reading ControlReg failed status-0x%x\n", status);
2502 break;
2503 } else
2504 dbg("ControlReg Reading success val is %x, status%d\n",
2505 Data, status);
880af9db
AC		 2506 Data |= 0x08; /* setting driver done bit */
2507 Data |= 0x04; /* sp1_bit to have cts change reflect in
2508 modem status reg */
3f542974 2509
880af9db
AC		 2510 /* Data |= 0x20; //rx_disable bit */
2511 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2512 mos7840_port->ControlRegOffset, Data);
2513 if (status < 0) {
2514 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2515 break;
2516 } else
2517 dbg("ControlReg Writing success(rx_disable) status%d\n",
2518 status);
2519
880af9db
AC		 2520 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2521 and 0x24 in DCR3 */
3f542974 2522 Data = 0x01;
880af9db
AC		 2523 status = mos7840_set_reg_sync(serial->port[i],
2524 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
3f542974
PS		 2525 if (status < 0) {
2526 dbg("Writing DCR0 failed status-0x%x\n", status);
2527 break;
2528 } else
2529 dbg("DCR0 Writing success status%d\n", status);
2530
2531 Data = 0x05;
880af9db
AC		 2532 status = mos7840_set_reg_sync(serial->port[i],
2533 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
3f542974
PS		 2534 if (status < 0) {
2535 dbg("Writing DCR1 failed status-0x%x\n", status);
2536 break;
2537 } else
2538 dbg("DCR1 Writing success status%d\n", status);
2539
2540 Data = 0x24;
880af9db
AC		 2541 status = mos7840_set_reg_sync(serial->port[i],
2542 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
3f542974
PS		 2543 if (status < 0) {
2544 dbg("Writing DCR2 failed status-0x%x\n", status);
2545 break;
2546 } else
2547 dbg("DCR2 Writing success status%d\n", status);
2548
880af9db 2549 /* write values in clkstart0x0 and clkmulti 0x20 */
3f542974 2550 Data = 0x0;
880af9db 2551 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2552 CLK_START_VALUE_REGISTER, Data);
2553 if (status < 0) {
2554 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2555 break;
2556 } else
2557 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2558
2559 Data = 0x20;
880af9db
AC		 2560 status = mos7840_set_reg_sync(serial->port[i],
2561 CLK_MULTI_REGISTER, Data);
3f542974
PS		 2562 if (status < 0) {
2563 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
2564 status);
0de9a702 2565 goto error;
3f542974
PS		 2566 } else
2567 dbg("CLK_MULTI_REGISTER Writing success status%d\n",
2568 status);
2569
880af9db 2570 /* write value 0x0 to scratchpad register */
3f542974 2571 Data = 0x00;
880af9db
AC		 2572 status = mos7840_set_uart_reg(serial->port[i],
2573 SCRATCH_PAD_REGISTER, Data);
3f542974
PS		 2574 if (status < 0) {
2575 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
2576 status);
2577 break;
2578 } else
2579 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
2580 status);
2581
880af9db 2582 /* Zero Length flag register */
3f542974 2583 if ((mos7840_port->port_num != 1)
0de9a702 2584 && (serial->num_ports == 2)) {
3f542974
PS		 2585
2586 Data = 0xff;
3f542974 2587 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2588 (__u16) (ZLP_REG1 +
2589 ((__u16)mos7840_port->port_num)), Data);
3f542974
PS		 2590 dbg("ZLIP offset%x\n",
2591 (__u16) (ZLP_REG1 +
880af9db 2592 ((__u16) mos7840_port->port_num)));
3f542974
PS		 2593 if (status < 0) {
2594 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2595 i + 2, status);
2596 break;
2597 } else
2598 dbg("ZLP_REG%d Writing success status%d\n",
2599 i + 2, status);
2600 } else {
2601 Data = 0xff;
3f542974 2602 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2603 (__u16) (ZLP_REG1 +
2604 ((__u16)mos7840_port->port_num) - 0x1), Data);
3f542974
PS		 2605 dbg("ZLIP offset%x\n",
2606 (__u16) (ZLP_REG1 +
2607 ((__u16) mos7840_port->port_num) - 0x1));
2608 if (status < 0) {
2609 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2610 i + 1, status);
2611 break;
2612 } else
2613 dbg("ZLP_REG%d Writing success status%d\n",
2614 i + 1, status);
2615
2616 }
0de9a702 2617 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974 2618 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
880af9db
AC		 2619 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2620 GFP_KERNEL);
2621 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2622 !mos7840_port->dr) {
0de9a702
ON		 2623 status = -ENOMEM;
2624 goto error;
2625 }
3f542974
PS		 2626 }
2627
880af9db 2628 /* Zero Length flag enable */
3f542974 2629 Data = 0x0f;
3f542974
PS		 2630 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2631 if (status < 0) {
2632 dbg("Writing ZLP_REG5 failed status-0x%x\n", status);
7ced46c3 2633 goto error;
3f542974
PS		 2634 } else
2635 dbg("ZLP_REG5 Writing success status%d\n", status);
2636
2637 /* setting configuration feature to one */
2638 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
97c4965d 2639 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
3f542974 2640 return 0;
0de9a702
ON		 2641error:
2642 for (/* nothing */; i >= 0; i--) {
2643 mos7840_port = mos7840_get_port_private(serial->port[i]);
2644
2645 kfree(mos7840_port->dr);
2646 kfree(mos7840_port->ctrl_buf);
2647 usb_free_urb(mos7840_port->control_urb);
2648 kfree(mos7840_port);
2649 serial->port[i] = NULL;
2650 }
2651 return status;
3f542974
PS		 2652}
2653
2654/****************************************************************************
2655 * mos7840_shutdown
2656 * This function is called whenever the device is removed from the usb bus.
2657 ****************************************************************************/
2658
2659static void mos7840_shutdown(struct usb_serial *serial)
2660{
2661 int i;
0de9a702 2662 unsigned long flags;
3f542974
PS		 2663 struct moschip_port *mos7840_port;
2664 dbg("%s \n", " shutdown :entering..........");
2665
2666 if (!serial) {
2667 dbg("%s", "Invalid Handler \n");
2668 return;
2669 }
2670
880af9db 2671 /* check for the ports to be closed,close the ports and disconnect */
3f542974
PS		 2672
2673 /* free private structure allocated for serial port *
2674 * stop reads and writes on all ports */
2675
2676 for (i = 0; i < serial->num_ports; ++i) {
2677 mos7840_port = mos7840_get_port_private(serial->port[i]);
0de9a702
ON		 2678 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2679 mos7840_port->zombie = 1;
2680 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 2681 usb_kill_urb(mos7840_port->control_urb);
0de9a702
ON		 2682 kfree(mos7840_port->ctrl_buf);
2683 kfree(mos7840_port->dr);
3f542974
PS		 2684 kfree(mos7840_port);
2685 mos7840_set_port_private(serial->port[i], NULL);
2686 }
2687
2688 dbg("%s\n", "Thank u :: ");
2689
2690}
2691
d9b1b787
JH		 2692static struct usb_driver io_driver = {
2693 .name = "mos7840",
2694 .probe = usb_serial_probe,
2695 .disconnect = usb_serial_disconnect,
2696 .id_table = moschip_id_table_combined,
2697 .no_dynamic_id = 1,
2698};
2699
3f542974
PS		 2700static struct usb_serial_driver moschip7840_4port_device = {
2701 .driver = {
2702 .owner = THIS_MODULE,
2703 .name = "mos7840",
2704 },
2705 .description = DRIVER_DESC,
d9b1b787 2706 .usb_driver = &io_driver,
3f542974 2707 .id_table = moschip_port_id_table,
3f542974 2708 .num_ports = 4,
3f542974
PS		 2709 .open = mos7840_open,
2710 .close = mos7840_close,
2711 .write = mos7840_write,
2712 .write_room = mos7840_write_room,
2713 .chars_in_buffer = mos7840_chars_in_buffer,
2714 .throttle = mos7840_throttle,
2715 .unthrottle = mos7840_unthrottle,
2716 .calc_num_ports = mos7840_calc_num_ports,
2717#ifdef MCSSerialProbe
2718 .probe = mos7840_serial_probe,
2719#endif
2720 .ioctl = mos7840_ioctl,
2721 .set_termios = mos7840_set_termios,
2722 .break_ctl = mos7840_break,
2723 .tiocmget = mos7840_tiocmget,
2724 .tiocmset = mos7840_tiocmset,
2725 .attach = mos7840_startup,
2726 .shutdown = mos7840_shutdown,
2727 .read_bulk_callback = mos7840_bulk_in_callback,
2728 .read_int_callback = mos7840_interrupt_callback,
2729};
2730
3f542974
PS		 2731/****************************************************************************
2732 * moschip7840_init
2733 * This is called by the module subsystem, or on startup to initialize us
2734 ****************************************************************************/
2735static int __init moschip7840_init(void)
2736{
2737 int retval;
2738
2739 dbg("%s \n", " mos7840_init :entering..........");
2740
2741 /* Register with the usb serial */
2742 retval = usb_serial_register(&moschip7840_4port_device);
2743
2744 if (retval)
2745 goto failed_port_device_register;
2746
2747 dbg("%s\n", "Entring...");
c197a8db
GKH		 2748 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2749 DRIVER_DESC "\n");
3f542974
PS		 2750
2751 /* Register with the usb */
2752 retval = usb_register(&io_driver);
3f542974
PS		 2753 if (retval == 0) {
2754 dbg("%s\n", "Leaving...");
2755 return 0;
2756 }
3f542974 2757 usb_serial_deregister(&moschip7840_4port_device);
880af9db 2758failed_port_device_register:
3f542974
PS		 2759 return retval;
2760}
2761
2762/****************************************************************************
2763 * moschip7840_exit
2764 * Called when the driver is about to be unloaded.
2765 ****************************************************************************/
2766static void __exit moschip7840_exit(void)
2767{
2768
2769 dbg("%s \n", " mos7840_exit :entering..........");
2770
2771 usb_deregister(&io_driver);
2772
2773 usb_serial_deregister(&moschip7840_4port_device);
2774
2775 dbg("%s\n", "Entring...");
2776}
2777
2778module_init(moschip7840_init);
2779module_exit(moschip7840_exit);
2780
2781/* Module information */
2782MODULE_DESCRIPTION(DRIVER_DESC);
2783MODULE_LICENSE("GPL");
2784
2785module_param(debug, bool, S_IRUGO | S_IWUSR);
2786MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux kernel - Deliverables
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