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USB: remove warn macro from HID core
[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) {
847 err("No more urbs???");
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;
441b62c1 856 err("%s-out of memory for urb buffers.", __func__);
3f542974
PS		 857 continue;
858 }
859 }
860
861/*****************************************************************************
862 * Initialize MCS7840 -- Write Init values to corresponding Registers
863 *
864 * Register Index
865 * 1 : IER
866 * 2 : FCR
867 * 3 : LCR
868 * 4 : MCR
869 *
870 * 0x08 : SP1/2 Control Reg
871 *****************************************************************************/
872
880af9db 873 /* NEED to check the following Block */
3f542974 874
3f542974
PS		 875 Data = 0x0;
876 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
877 if (status < 0) {
878 dbg("Reading Spreg failed\n");
879 return -1;
880 }
881 Data |= 0x80;
882 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
883 if (status < 0) {
884 dbg("writing Spreg failed\n");
885 return -1;
886 }
887
888 Data &= ~0x80;
889 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
890 if (status < 0) {
891 dbg("writing Spreg failed\n");
892 return -1;
893 }
880af9db 894 /* End of block to be checked */
3f542974 895
3f542974 896 Data = 0x0;
880af9db
AC		 897 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
898 &Data);
3f542974
PS		 899 if (status < 0) {
900 dbg("Reading Controlreg failed\n");
901 return -1;
902 }
880af9db
AC		 903 Data |= 0x08; /* Driver done bit */
904 Data |= 0x20; /* rx_disable */
905 status = mos7840_set_reg_sync(port,
906 mos7840_port->ControlRegOffset, Data);
3f542974
PS		 907 if (status < 0) {
908 dbg("writing Controlreg failed\n");
909 return -1;
910 }
880af9db
AC		 911 /* do register settings here */
912 /* Set all regs to the device default values. */
913 /***********************************
914 * First Disable all interrupts.
915 ***********************************/
3f542974 916 Data = 0x00;
3f542974
PS		 917 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
918 if (status < 0) {
919 dbg("disableing interrupts failed\n");
920 return -1;
921 }
880af9db 922 /* Set FIFO_CONTROL_REGISTER to the default value */
3f542974 923 Data = 0x00;
3f542974
PS		 924 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
925 if (status < 0) {
926 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
927 return -1;
928 }
929
930 Data = 0xcf;
3f542974
PS		 931 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
932 if (status < 0) {
933 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
934 return -1;
935 }
936
937 Data = 0x03;
3f542974
PS		 938 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
939 mos7840_port->shadowLCR = Data;
940
941 Data = 0x0b;
3f542974
PS		 942 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
943 mos7840_port->shadowMCR = Data;
944
945 Data = 0x00;
3f542974
PS		 946 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
947 mos7840_port->shadowLCR = Data;
948
880af9db 949 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 950 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
951
952 Data = 0x0c;
3f542974
PS		 953 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
954
955 Data = 0x0;
3f542974
PS		 956 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
957
958 Data = 0x00;
3f542974
PS		 959 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
960
961 Data = Data & ~SERIAL_LCR_DLAB;
3f542974
PS		 962 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
963 mos7840_port->shadowLCR = Data;
964
880af9db 965 /* clearing Bulkin and Bulkout Fifo */
3f542974 966 Data = 0x0;
3f542974
PS		 967 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
968
969 Data = Data | 0x0c;
3f542974
PS		 970 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
971
972 Data = Data & ~0x0c;
3f542974 973 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
880af9db 974 /* Finally enable all interrupts */
3f542974 975 Data = 0x0c;
3f542974
PS		 976 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
977
880af9db 978 /* clearing rx_disable */
3f542974 979 Data = 0x0;
880af9db
AC		 980 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
981 &Data);
3f542974 982 Data = Data & ~0x20;
880af9db
AC		 983 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
984 Data);
3f542974 985
880af9db 986 /* rx_negate */
3f542974 987 Data = 0x0;
880af9db
AC		 988 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
989 &Data);
3f542974 990 Data = Data | 0x10;
880af9db
AC		 991 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
992 Data);
3f542974
PS		 993
994 /* force low_latency on so that our tty_push actually forces *
995 * the data through,otherwise it is scheduled, and with *
996 * high data rates (like with OHCI) data can get lost. */
95da310e
AC		 997 if (tty)
998 tty->low_latency = 1;
880af9db
AC		 999
1000 /* Check to see if we've set up our endpoint info yet *
1001 * (can't set it up in mos7840_startup as the structures *
1002 * were not set up at that time.) */
0de9a702 1003 if (port0->open_ports == 1) {
3f542974 1004 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1005 /* set up interrupt urb */
3f542974 1006 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1007 serial->dev,
1008 usb_rcvintpipe(serial->dev,
1009 serial->port[0]->interrupt_in_endpointAddress),
1010 serial->port[0]->interrupt_in_buffer,
1011 serial->port[0]->interrupt_in_urb->
1012 transfer_buffer_length,
1013 mos7840_interrupt_callback,
1014 serial,
1015 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1016
1017 /* start interrupt read for mos7840 *
1018 * will continue as long as mos7840 is connected */
1019
1020 response =
1021 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1022 GFP_KERNEL);
1023 if (response) {
1024 err("%s - Error %d submitting interrupt urb",
441b62c1 1025 __func__, response);
3f542974
PS		 1026 }
1027
1028 }
1029
1030 }
1031
1032 /* see if we've set up our endpoint info yet *
1033 * (can't set it up in mos7840_startup as the *
1034 * structures were not set up at that time.) */
1035
1036 dbg("port number is %d \n", port->number);
1037 dbg("serial number is %d \n", port->serial->minor);
1038 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress);
1039 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress);
1040 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress);
1041 dbg("port's number in the device is %d\n", mos7840_port->port_num);
1042 mos7840_port->read_urb = port->read_urb;
1043
1044 /* set up our bulk in urb */
1045
1046 usb_fill_bulk_urb(mos7840_port->read_urb,
1047 serial->dev,
1048 usb_rcvbulkpipe(serial->dev,
1049 port->bulk_in_endpointAddress),
1050 port->bulk_in_buffer,
1051 mos7840_port->read_urb->transfer_buffer_length,
1052 mos7840_bulk_in_callback, mos7840_port);
1053
1054 dbg("mos7840_open: bulkin endpoint is %d\n",
1055 port->bulk_in_endpointAddress);
1056 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1057 if (response) {
441b62c1 1058 err("%s - Error %d submitting control urb", __func__,
3f542974
PS		 1059 response);
1060 }
1061
1062 /* initialize our wait queues */
1063 init_waitqueue_head(&mos7840_port->wait_chase);
1064 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1065
1066 /* initialize our icount structure */
1067 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1068
1069 /* initialize our port settings */
880af9db
AC		 1070 /* Must set to enable ints! */
1071 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1072 /* send a open port command */
1073 mos7840_port->open = 1;
880af9db 1074 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974
PS		 1075 mos7840_port->icount.tx = 0;
1076 mos7840_port->icount.rx = 0;
1077
880af9db
AC		 1078 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n",
1079 serial, mos7840_port, port);
3f542974
PS		 1080
1081 return 0;
1082
1083}
1084
1085/*****************************************************************************
1086 * mos7840_chars_in_buffer
1087 * this function is called by the tty driver when it wants to know how many
1088 * bytes of data we currently have outstanding in the port (data that has
1089 * been written, but hasn't made it out the port yet)
1090 * If successful, we return the number of bytes left to be written in the
1091 * system,
95da310e 1092 * Otherwise we return zero.
3f542974
PS		 1093 *****************************************************************************/
1094
95da310e 1095static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1096{
95da310e 1097 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1098 int i;
1099 int chars = 0;
0de9a702 1100 unsigned long flags;
3f542974
PS		 1101 struct moschip_port *mos7840_port;
1102
1103 dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
1104
441b62c1 1105 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974 1106 dbg("%s", "Invalid port \n");
95da310e 1107 return 0;
3f542974
PS		 1108 }
1109
1110 mos7840_port = mos7840_get_port_private(port);
1111 if (mos7840_port == NULL) {
1112 dbg("%s \n", "mos7840_break:leaving ...........");
95da310e 1113 return 0;
3f542974
PS		 1114 }
1115
880af9db 1116 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
95da310e
AC		 1117 for (i = 0; i < NUM_URBS; ++i)
1118 if (mos7840_port->busy[i])
3f542974 1119 chars += URB_TRANSFER_BUFFER_SIZE;
880af9db 1120 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
441b62c1 1121 dbg("%s - returns %d", __func__, chars);
0de9a702 1122 return chars;
3f542974
PS		 1123
1124}
1125
1126/************************************************************************
1127 *
1128 * mos7840_block_until_tx_empty
1129 *
1130 * This function will block the close until one of the following:
1131 * 1. TX count are 0
1132 * 2. The mos7840 has stopped
dc0d5c1e 1133 * 3. A timeout of 3 seconds without activity has expired
3f542974
PS		 1134 *
1135 ************************************************************************/
95da310e
AC		 1136static void mos7840_block_until_tx_empty(struct tty_struct *tty,
1137 struct moschip_port *mos7840_port)
3f542974
PS		 1138{
1139 int timeout = HZ / 10;
1140 int wait = 30;
1141 int count;
1142
1143 while (1) {
1144
95da310e 1145 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1146
1147 /* Check for Buffer status */
880af9db 1148 if (count <= 0)
3f542974 1149 return;
3f542974
PS		 1150
1151 /* Block the thread for a while */
1152 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1153 timeout);
1154
1155 /* No activity.. count down section */
1156 wait--;
1157 if (wait == 0) {
441b62c1 1158 dbg("%s - TIMEOUT", __func__);
3f542974
PS		 1159 return;
1160 } else {
dc0d5c1e 1161 /* Reset timeout value back to seconds */
3f542974
PS		 1162 wait = 30;
1163 }
1164 }
1165}
1166
1167/*****************************************************************************
1168 * mos7840_close
1169 * this function is called by the tty driver when a port is closed
1170 *****************************************************************************/
1171
95da310e
AC		 1172static void mos7840_close(struct tty_struct *tty,
1173 struct usb_serial_port *port, struct file *filp)
3f542974
PS		 1174{
1175 struct usb_serial *serial;
1176 struct moschip_port *mos7840_port;
0de9a702 1177 struct moschip_port *port0;
3f542974
PS		 1178 int j;
1179 __u16 Data;
1180
1181 dbg("%s\n", "mos7840_close:entering...");
1182
441b62c1 1183 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1184 dbg("%s", "Port Paranoia failed \n");
1185 return;
1186 }
1187
441b62c1 1188 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 1189 if (!serial) {
1190 dbg("%s", "Serial Paranoia failed \n");
1191 return;
1192 }
1193
1194 mos7840_port = mos7840_get_port_private(port);
0de9a702 1195 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1196
0de9a702 1197 if (mos7840_port == NULL || port0 == NULL)
3f542974 1198 return;
3f542974
PS		 1199
1200 for (j = 0; j < NUM_URBS; ++j)
1201 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1202
1203 /* Freeing Write URBs */
1204 for (j = 0; j < NUM_URBS; ++j) {
1205 if (mos7840_port->write_urb_pool[j]) {
1206 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1207 kfree(mos7840_port->write_urb_pool[j]->
1208 transfer_buffer);
1209
1210 usb_free_urb(mos7840_port->write_urb_pool[j]);
1211 }
1212 }
1213
95da310e 1214 if (serial->dev)
3f542974 1215 /* flush and block until tx is empty */
95da310e 1216 mos7840_block_until_tx_empty(tty, mos7840_port);
3f542974
PS		 1217
1218 /* While closing port, shutdown all bulk read, write *
1219 * and interrupt read if they exists */
1220 if (serial->dev) {
3f542974
PS		 1221 if (mos7840_port->write_urb) {
1222 dbg("%s", "Shutdown bulk write\n");
1223 usb_kill_urb(mos7840_port->write_urb);
1224 }
3f542974
PS		 1225 if (mos7840_port->read_urb) {
1226 dbg("%s", "Shutdown bulk read\n");
1227 usb_kill_urb(mos7840_port->read_urb);
1228 }
1229 if ((&mos7840_port->control_urb)) {
1230 dbg("%s", "Shutdown control read\n");
880af9db 1231 /*/ usb_kill_urb (mos7840_port->control_urb); */
3f542974
PS		 1232 }
1233 }
880af9db
AC		 1234/* if(mos7840_port->ctrl_buf != NULL) */
1235/* kfree(mos7840_port->ctrl_buf); */
0de9a702 1236 port0->open_ports--;
3f542974 1237 dbg("mos7840_num_open_ports in close%d:in port%d\n",
0de9a702
ON		 1238 port0->open_ports, port->number);
1239 if (port0->open_ports == 0) {
3f542974
PS		 1240 if (serial->port[0]->interrupt_in_urb) {
1241 dbg("%s", "Shutdown interrupt_in_urb\n");
0de9a702 1242 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1243 }
1244 }
1245
1246 if (mos7840_port->write_urb) {
1247 /* if this urb had a transfer buffer already (old tx) free it */
880af9db 1248 if (mos7840_port->write_urb->transfer_buffer != NULL)
3f542974 1249 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1250 usb_free_urb(mos7840_port->write_urb);
1251 }
1252
1253 Data = 0x0;
1254 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1255
1256 Data = 0x00;
1257 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1258
1259 mos7840_port->open = 0;
1260
1261 dbg("%s \n", "Leaving ............");
1262}
1263
1264/************************************************************************
1265 *
1266 * mos7840_block_until_chase_response
1267 *
1268 * This function will block the close until one of the following:
1269 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1270 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1271 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1272 *
1273 ************************************************************************/
1274
95da310e
AC		 1275static void mos7840_block_until_chase_response(struct tty_struct *tty,
1276 struct moschip_port *mos7840_port)
3f542974
PS		 1277{
1278 int timeout = 1 * HZ;
1279 int wait = 10;
1280 int count;
1281
1282 while (1) {
95da310e 1283 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1284
1285 /* Check for Buffer status */
880af9db 1286 if (count <= 0)
3f542974 1287 return;
3f542974
PS		 1288
1289 /* Block the thread for a while */
1290 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1291 timeout);
1292 /* No activity.. count down section */
1293 wait--;
1294 if (wait == 0) {
441b62c1 1295 dbg("%s - TIMEOUT", __func__);
3f542974
PS		 1296 return;
1297 } else {
dc0d5c1e 1298 /* Reset timeout value back to seconds */
3f542974
PS		 1299 wait = 10;
1300 }
1301 }
1302
1303}
1304
1305/*****************************************************************************
1306 * mos7840_break
1307 * this function sends a break to the port
1308 *****************************************************************************/
95da310e 1309static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1310{
95da310e 1311 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1312 unsigned char data;
1313 struct usb_serial *serial;
1314 struct moschip_port *mos7840_port;
1315
1316 dbg("%s \n", "Entering ...........");
1317 dbg("mos7840_break: Start\n");
1318
441b62c1 1319 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1320 dbg("%s", "Port Paranoia failed \n");
1321 return;
1322 }
1323
441b62c1 1324 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 1325 if (!serial) {
1326 dbg("%s", "Serial Paranoia failed \n");
1327 return;
1328 }
1329
1330 mos7840_port = mos7840_get_port_private(port);
1331
880af9db 1332 if (mos7840_port == NULL)
3f542974 1333 return;
3f542974 1334
95da310e 1335 if (serial->dev)
3f542974 1336 /* flush and block until tx is empty */
95da310e 1337 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1338
95da310e 1339 if (break_state == -1)
3f542974 1340 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1341 else
3f542974 1342 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974
PS		 1343
1344 mos7840_port->shadowLCR = data;
1345 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
1346 mos7840_port->shadowLCR);
1347 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1348 mos7840_port->shadowLCR);
1349
1350 return;
1351}
1352
1353/*****************************************************************************
1354 * mos7840_write_room
1355 * this function is called by the tty driver when it wants to know how many
1356 * bytes of data we can accept for a specific port.
1357 * If successful, we return the amount of room that we have for this port
1358 * Otherwise we return a negative error number.
1359 *****************************************************************************/
1360
95da310e 1361static int mos7840_write_room(struct tty_struct *tty)
3f542974 1362{
95da310e 1363 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1364 int i;
1365 int room = 0;
0de9a702 1366 unsigned long flags;
3f542974
PS		 1367 struct moschip_port *mos7840_port;
1368
1369 dbg("%s \n", " mos7840_write_room:entering ...........");
1370
441b62c1 1371 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1372 dbg("%s", "Invalid port \n");
1373 dbg("%s \n", " mos7840_write_room:leaving ...........");
1374 return -1;
1375 }
1376
1377 mos7840_port = mos7840_get_port_private(port);
1378 if (mos7840_port == NULL) {
1379 dbg("%s \n", "mos7840_break:leaving ...........");
1380 return -1;
1381 }
1382
0de9a702 1383 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1384 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1385 if (!mos7840_port->busy[i])
3f542974 1386 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1387 }
0de9a702 1388 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1389
0de9a702 1390 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
441b62c1 1391 dbg("%s - returns %d", __func__, room);
0de9a702 1392 return room;
3f542974
PS		 1393
1394}
1395
1396/*****************************************************************************
1397 * mos7840_write
1398 * this function is called by the tty driver when data should be written to
1399 * the port.
1400 * If successful, we return the number of bytes written, otherwise we
1401 * return a negative error number.
1402 *****************************************************************************/
1403
95da310e 1404static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1405 const unsigned char *data, int count)
1406{
1407 int status;
1408 int i;
1409 int bytes_sent = 0;
1410 int transfer_size;
0de9a702 1411 unsigned long flags;
3f542974
PS		 1412
1413 struct moschip_port *mos7840_port;
1414 struct usb_serial *serial;
1415 struct urb *urb;
880af9db 1416 /* __u16 Data; */
3f542974
PS		 1417 const unsigned char *current_position = data;
1418 unsigned char *data1;
1419 dbg("%s \n", "entering ...........");
880af9db
AC		 1420 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1421 mos7840_port->shadowLCR); */
3f542974
PS		 1422
1423#ifdef NOTMOS7840
1424 Data = 0x00;
3f542974
PS		 1425 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1426 mos7840_port->shadowLCR = Data;
1427 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
1428 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1429 mos7840_port->shadowLCR);
1430
880af9db
AC		 1431 /* Data = 0x03; */
1432 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1433 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1434
880af9db 1435 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1436 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1437
880af9db
AC		 1438 /* Data = 0x0c; */
1439 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1440 Data = 0x00;
3f542974
PS		 1441 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1442 dbg("mos7840_write:DLL value is %x\n", Data);
1443
1444 Data = 0x0;
3f542974
PS		 1445 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1446 dbg("mos7840_write:DLM value is %x\n", Data);
1447
1448 Data = Data & ~SERIAL_LCR_DLAB;
1449 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1450 mos7840_port->shadowLCR);
3f542974
PS		 1451 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1452#endif
1453
441b62c1 1454 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1455 dbg("%s", "Port Paranoia failed \n");
1456 return -1;
1457 }
1458
1459 serial = port->serial;
441b62c1 1460 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 1461 dbg("%s", "Serial Paranoia failed \n");
1462 return -1;
1463 }
1464
1465 mos7840_port = mos7840_get_port_private(port);
1466 if (mos7840_port == NULL) {
1467 dbg("%s", "mos7840_port is NULL\n");
1468 return -1;
1469 }
1470
1471 /* try to find a free urb in the list */
1472 urb = NULL;
1473
0de9a702 1474 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1475 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1476 if (!mos7840_port->busy[i]) {
1477 mos7840_port->busy[i] = 1;
3f542974
PS		 1478 urb = mos7840_port->write_urb_pool[i];
1479 dbg("\nURB:%d", i);
1480 break;
1481 }
1482 }
0de9a702 1483 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1484
1485 if (urb == NULL) {
441b62c1 1486 dbg("%s - no more free urbs", __func__);
3f542974
PS		 1487 goto exit;
1488 }
1489
1490 if (urb->transfer_buffer == NULL) {
1491 urb->transfer_buffer =
1492 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1493
1494 if (urb->transfer_buffer == NULL) {
441b62c1 1495 err("%s no more kernel memory...", __func__);
3f542974
PS		 1496 goto exit;
1497 }
1498 }
1499 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1500
97c4965d 1501 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1502
1503 /* fill urb with data and submit */
1504 usb_fill_bulk_urb(urb,
1505 serial->dev,
1506 usb_sndbulkpipe(serial->dev,
1507 port->bulk_out_endpointAddress),
1508 urb->transfer_buffer,
1509 transfer_size,
1510 mos7840_bulk_out_data_callback, mos7840_port);
1511
1512 data1 = urb->transfer_buffer;
1513 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress);
1514
1515 /* send it down the pipe */
1516 status = usb_submit_urb(urb, GFP_ATOMIC);
1517
1518 if (status) {
0de9a702 1519 mos7840_port->busy[i] = 0;
3f542974 1520 err("%s - usb_submit_urb(write bulk) failed with status = %d",
441b62c1 1521 __func__, status);
3f542974
PS		 1522 bytes_sent = status;
1523 goto exit;
1524 }
1525 bytes_sent = transfer_size;
1526 mos7840_port->icount.tx += transfer_size;
0de9a702 1527 smp_wmb();
3f542974 1528 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
95da310e 1529exit:
3f542974
PS		 1530 return bytes_sent;
1531
1532}
1533
1534/*****************************************************************************
1535 * mos7840_throttle
1536 * this function is called by the tty driver when it wants to stop the data
1537 * being read from the port.
1538 *****************************************************************************/
1539
95da310e 1540static void mos7840_throttle(struct tty_struct *tty)
3f542974 1541{
95da310e 1542 struct usb_serial_port *port = tty->driver_data;
3f542974 1543 struct moschip_port *mos7840_port;
3f542974
PS		 1544 int status;
1545
441b62c1 1546 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1547 dbg("%s", "Invalid port \n");
1548 return;
1549 }
1550
1551 dbg("- port %d\n", port->number);
1552
1553 mos7840_port = mos7840_get_port_private(port);
1554
1555 if (mos7840_port == NULL)
1556 return;
1557
1558 if (!mos7840_port->open) {
1559 dbg("%s\n", "port not opened");
1560 return;
1561 }
1562
1563 dbg("%s", "Entering .......... \n");
1564
3f542974
PS		 1565 /* if we are implementing XON/XOFF, send the stop character */
1566 if (I_IXOFF(tty)) {
1567 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1568 status = mos7840_write(tty, port, &stop_char, 1);
1569 if (status <= 0)
3f542974 1570 return;
3f542974 1571 }
3f542974
PS		 1572 /* if we are implementing RTS/CTS, toggle that line */
1573 if (tty->termios->c_cflag & CRTSCTS) {
1574 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1575 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1576 mos7840_port->shadowMCR);
95da310e 1577 if (status < 0)
3f542974 1578 return;
3f542974
PS		 1579 }
1580
1581 return;
1582}
1583
1584/*****************************************************************************
1585 * mos7840_unthrottle
880af9db
AC		 1586 * this function is called by the tty driver when it wants to resume
1587 * the data being read from the port (called after mos7840_throttle is
1588 * called)
3f542974 1589 *****************************************************************************/
95da310e 1590static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1591{
95da310e 1592 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1593 int status;
1594 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1595
441b62c1 1596 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1597 dbg("%s", "Invalid port \n");
1598 return;
1599 }
1600
1601 if (mos7840_port == NULL)
1602 return;
1603
1604 if (!mos7840_port->open) {
441b62c1 1605 dbg("%s - port not opened", __func__);
3f542974
PS		 1606 return;
1607 }
1608
1609 dbg("%s", "Entering .......... \n");
1610
3f542974
PS		 1611 /* if we are implementing XON/XOFF, send the start character */
1612 if (I_IXOFF(tty)) {
1613 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1614 status = mos7840_write(tty, port, &start_char, 1);
1615 if (status <= 0)
3f542974 1616 return;
3f542974
PS		 1617 }
1618
1619 /* if we are implementing RTS/CTS, toggle that line */
1620 if (tty->termios->c_cflag & CRTSCTS) {
1621 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1622 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1623 mos7840_port->shadowMCR);
95da310e 1624 if (status < 0)
3f542974 1625 return;
3f542974 1626 }
3f542974
PS		 1627}
1628
95da310e 1629static int mos7840_tiocmget(struct tty_struct *tty, struct file *file)
3f542974 1630{
95da310e 1631 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1632 struct moschip_port *mos7840_port;
1633 unsigned int result;
1634 __u16 msr;
1635 __u16 mcr;
880af9db 1636 int status;
3f542974
PS		 1637 mos7840_port = mos7840_get_port_private(port);
1638
441b62c1 1639 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1640
1641 if (mos7840_port == NULL)
1642 return -ENODEV;
1643
1644 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1645 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1646 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1647 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1648 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1649 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1650 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1651 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1652 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1653
441b62c1 1654 dbg("%s - 0x%04X", __func__, result);
3f542974
PS		 1655
1656 return result;
1657}
1658
95da310e 1659static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
3f542974
PS		 1660 unsigned int set, unsigned int clear)
1661{
95da310e 1662 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1663 struct moschip_port *mos7840_port;
1664 unsigned int mcr;
87521c46 1665 int status;
3f542974 1666
441b62c1 1667 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1668
1669 mos7840_port = mos7840_get_port_private(port);
1670
1671 if (mos7840_port == NULL)
1672 return -ENODEV;
1673
e2984494 1674 /* FIXME: What locks the port registers ? */
3f542974
PS		 1675 mcr = mos7840_port->shadowMCR;
1676 if (clear & TIOCM_RTS)
1677 mcr &= ~MCR_RTS;
1678 if (clear & TIOCM_DTR)
1679 mcr &= ~MCR_DTR;
1680 if (clear & TIOCM_LOOP)
1681 mcr &= ~MCR_LOOPBACK;
1682
1683 if (set & TIOCM_RTS)
1684 mcr |= MCR_RTS;
1685 if (set & TIOCM_DTR)
1686 mcr |= MCR_DTR;
1687 if (set & TIOCM_LOOP)
1688 mcr |= MCR_LOOPBACK;
1689
1690 mos7840_port->shadowMCR = mcr;
1691
3f542974
PS		 1692 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1693 if (status < 0) {
1694 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
87521c46 1695 return status;
3f542974
PS		 1696 }
1697
1698 return 0;
1699}
1700
1701/*****************************************************************************
1702 * mos7840_calc_baud_rate_divisor
1703 * this function calculates the proper baud rate divisor for the specified
1704 * baud rate.
1705 *****************************************************************************/
1706static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
880af9db 1707 __u16 *clk_sel_val)
3f542974
PS		 1708{
1709
441b62c1 1710 dbg("%s - %d", __func__, baudRate);
3f542974
PS		 1711
1712 if (baudRate <= 115200) {
1713 *divisor = 115200 / baudRate;
1714 *clk_sel_val = 0x0;
1715 }
1716 if ((baudRate > 115200) && (baudRate <= 230400)) {
1717 *divisor = 230400 / baudRate;
1718 *clk_sel_val = 0x10;
1719 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1720 *divisor = 403200 / baudRate;
1721 *clk_sel_val = 0x20;
1722 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1723 *divisor = 460800 / baudRate;
1724 *clk_sel_val = 0x30;
1725 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1726 *divisor = 806400 / baudRate;
1727 *clk_sel_val = 0x40;
1728 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1729 *divisor = 921600 / baudRate;
1730 *clk_sel_val = 0x50;
1731 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1732 *divisor = 1572864 / baudRate;
1733 *clk_sel_val = 0x60;
1734 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1735 *divisor = 3145728 / baudRate;
1736 *clk_sel_val = 0x70;
1737 }
1738 return 0;
1739
1740#ifdef NOTMCS7840
1741
1742 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1743 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1744 *divisor = mos7840_divisor_table[i].Divisor;
1745 return 0;
1746 }
1747 }
1748
1749 /* After trying for all the standard baud rates *
1750 * Try calculating the divisor for this baud rate */
1751
1752 if (baudrate > 75 && baudrate < 230400) {
1753 /* get the divisor */
1754 custom = (__u16) (230400L / baudrate);
1755
1756 /* Check for round off */
1757 round1 = (__u16) (2304000L / baudrate);
1758 round = (__u16) (round1 - (custom * 10));
880af9db 1759 if (round > 4)
3f542974 1760 custom++;
3f542974
PS		 1761 *divisor = custom;
1762
1763 dbg(" Baud %d = %d\n", baudrate, custom);
1764 return 0;
1765 }
1766
1767 dbg("%s\n", " Baud calculation Failed...");
1768 return -1;
1769#endif
1770}
1771
1772/*****************************************************************************
1773 * mos7840_send_cmd_write_baud_rate
1774 * this function sends the proper command to change the baud rate of the
1775 * specified port.
1776 *****************************************************************************/
1777
1778static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1779 int baudRate)
1780{
1781 int divisor = 0;
1782 int status;
1783 __u16 Data;
1784 unsigned char number;
1785 __u16 clk_sel_val;
1786 struct usb_serial_port *port;
1787
1788 if (mos7840_port == NULL)
1789 return -1;
1790
1791 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 1792 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1793 dbg("%s", "Invalid port \n");
1794 return -1;
1795 }
1796
441b62c1 1797 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
3f542974
PS		 1798 dbg("%s", "Invalid Serial \n");
1799 return -1;
1800 }
1801
1802 dbg("%s", "Entering .......... \n");
1803
1804 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1805
441b62c1 1806 dbg("%s - port = %d, baud = %d", __func__,
3f542974 1807 mos7840_port->port->number, baudRate);
880af9db 1808 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1809 if (baudRate > 115200) {
1810#ifdef HW_flow_control
880af9db
AC		 1811 /* NOTE: need to see the pther register to modify */
1812 /* setting h/w flow control bit to 1 */
3f542974
PS		 1813 Data = 0x2b;
1814 mos7840_port->shadowMCR = Data;
880af9db
AC		 1815 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1816 Data);
3f542974
PS		 1817 if (status < 0) {
1818 dbg("Writing spreg failed in set_serial_baud\n");
1819 return -1;
1820 }
1821#endif
1822
1823 } else {
1824#ifdef HW_flow_control
880af9db 1825 / *setting h/w flow control bit to 0 */
3f542974
PS		 1826 Data = 0xb;
1827 mos7840_port->shadowMCR = Data;
880af9db
AC		 1828 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1829 Data);
3f542974
PS		 1830 if (status < 0) {
1831 dbg("Writing spreg failed in set_serial_baud\n");
1832 return -1;
1833 }
1834#endif
1835
1836 }
1837
880af9db 1838 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1839 clk_sel_val = 0x0;
1840 Data = 0x0;
880af9db 1841 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
3f542974 1842 &clk_sel_val);
880af9db
AC		 1843 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1844 &Data);
3f542974
PS		 1845 if (status < 0) {
1846 dbg("reading spreg failed in set_serial_baud\n");
1847 return -1;
1848 }
1849 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1850 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1851 Data);
3f542974
PS		 1852 if (status < 0) {
1853 dbg("Writing spreg failed in set_serial_baud\n");
1854 return -1;
1855 }
1856 /* Calculate the Divisor */
1857
1858 if (status) {
441b62c1 1859 err("%s - bad baud rate", __func__);
3f542974
PS		 1860 dbg("%s\n", "bad baud rate");
1861 return status;
1862 }
1863 /* Enable access to divisor latch */
1864 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1865 mos7840_port->shadowLCR = Data;
1866 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1867
1868 /* Write the divisor */
1869 Data = (unsigned char)(divisor & 0xff);
1870 dbg("set_serial_baud Value to write DLL is %x\n", Data);
1871 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1872
1873 Data = (unsigned char)((divisor & 0xff00) >> 8);
1874 dbg("set_serial_baud Value to write DLM is %x\n", Data);
1875 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1876
1877 /* Disable access to divisor latch */
1878 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1879 mos7840_port->shadowLCR = Data;
1880 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1881
1882 }
3f542974
PS		 1883 return status;
1884}
1885
1886/*****************************************************************************
1887 * mos7840_change_port_settings
1888 * This routine is called to set the UART on the device to match
1889 * the specified new settings.
1890 *****************************************************************************/
1891
95da310e
AC		 1892static void mos7840_change_port_settings(struct tty_struct *tty,
1893 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1894{
3f542974
PS		 1895 int baud;
1896 unsigned cflag;
1897 unsigned iflag;
1898 __u8 lData;
1899 __u8 lParity;
1900 __u8 lStop;
1901 int status;
1902 __u16 Data;
1903 struct usb_serial_port *port;
1904 struct usb_serial *serial;
1905
1906 if (mos7840_port == NULL)
1907 return;
1908
1909 port = (struct usb_serial_port *)mos7840_port->port;
1910
441b62c1 1911 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1912 dbg("%s", "Invalid port \n");
1913 return;
1914 }
1915
441b62c1 1916 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
3f542974
PS		 1917 dbg("%s", "Invalid Serial \n");
1918 return;
1919 }
1920
1921 serial = port->serial;
1922
441b62c1 1923 dbg("%s - port %d", __func__, mos7840_port->port->number);
3f542974
PS		 1924
1925 if (!mos7840_port->open) {
441b62c1 1926 dbg("%s - port not opened", __func__);
3f542974
PS		 1927 return;
1928 }
1929
3f542974
PS		 1930 dbg("%s", "Entering .......... \n");
1931
1932 lData = LCR_BITS_8;
1933 lStop = LCR_STOP_1;
1934 lParity = LCR_PAR_NONE;
1935
1936 cflag = tty->termios->c_cflag;
1937 iflag = tty->termios->c_iflag;
1938
1939 /* Change the number of bits */
1940 if (cflag & CSIZE) {
1941 switch (cflag & CSIZE) {
1942 case CS5:
1943 lData = LCR_BITS_5;
1944 break;
1945
1946 case CS6:
1947 lData = LCR_BITS_6;
1948 break;
1949
1950 case CS7:
1951 lData = LCR_BITS_7;
1952 break;
1953 default:
1954 case CS8:
1955 lData = LCR_BITS_8;
1956 break;
1957 }
1958 }
1959 /* Change the Parity bit */
1960 if (cflag & PARENB) {
1961 if (cflag & PARODD) {
1962 lParity = LCR_PAR_ODD;
441b62c1 1963 dbg("%s - parity = odd", __func__);
3f542974
PS		 1964 } else {
1965 lParity = LCR_PAR_EVEN;
441b62c1 1966 dbg("%s - parity = even", __func__);
3f542974
PS		 1967 }
1968
1969 } else {
441b62c1 1970 dbg("%s - parity = none", __func__);
3f542974
PS		 1971 }
1972
880af9db 1973 if (cflag & CMSPAR)
3f542974 1974 lParity = lParity | 0x20;
3f542974
PS		 1975
1976 /* Change the Stop bit */
1977 if (cflag & CSTOPB) {
1978 lStop = LCR_STOP_2;
441b62c1 1979 dbg("%s - stop bits = 2", __func__);
3f542974
PS		 1980 } else {
1981 lStop = LCR_STOP_1;
441b62c1 1982 dbg("%s - stop bits = 1", __func__);
3f542974
PS		 1983 }
1984
1985 /* Update the LCR with the correct value */
1986 mos7840_port->shadowLCR &=
1987 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1988 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1989
1990 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
1991 mos7840_port->shadowLCR);
1992 /* Disable Interrupts */
1993 Data = 0x00;
1994 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1995
1996 Data = 0x00;
1997 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1998
1999 Data = 0xcf;
2000 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2001
2002 /* Send the updated LCR value to the mos7840 */
2003 Data = mos7840_port->shadowLCR;
2004
2005 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2006
2007 Data = 0x00b;
2008 mos7840_port->shadowMCR = Data;
2009 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2010 Data = 0x00b;
2011 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2012
2013 /* set up the MCR register and send it to the mos7840 */
2014
2015 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 2016 if (cflag & CBAUD)
3f542974 2017 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 2018
880af9db 2019 if (cflag & CRTSCTS)
3f542974 2020 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 2021 else
3f542974 2022 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 2023
2024 Data = mos7840_port->shadowMCR;
2025 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2026
2027 /* Determine divisor based on baud rate */
2028 baud = tty_get_baud_rate(tty);
2029
2030 if (!baud) {
2031 /* pick a default, any default... */
2032 dbg("%s\n", "Picked default baud...");
2033 baud = 9600;
2034 }
2035
441b62c1 2036 dbg("%s - baud rate = %d", __func__, baud);
3f542974
PS		 2037 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2038
2039 /* Enable Interrupts */
2040 Data = 0x0c;
2041 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2042
2043 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2044 mos7840_port->read_urb->dev = serial->dev;
2045
2046 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2047
2048 if (status) {
2049 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2050 status);
2051 }
2052 }
2053 wake_up(&mos7840_port->delta_msr_wait);
2054 mos7840_port->delta_msr_cond = 1;
2055 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
2056 mos7840_port->shadowLCR);
2057
2058 return;
2059}
2060
2061/*****************************************************************************
2062 * mos7840_set_termios
2063 * this function is called by the tty driver when it wants to change
2064 * the termios structure
2065 *****************************************************************************/
2066
95da310e
AC		 2067static void mos7840_set_termios(struct tty_struct *tty,
2068 struct usb_serial_port *port,
606d099c 2069 struct ktermios *old_termios)
3f542974
PS		 2070{
2071 int status;
2072 unsigned int cflag;
2073 struct usb_serial *serial;
2074 struct moschip_port *mos7840_port;
3f542974 2075 dbg("mos7840_set_termios: START\n");
441b62c1 2076 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2077 dbg("%s", "Invalid port \n");
2078 return;
2079 }
2080
2081 serial = port->serial;
2082
441b62c1 2083 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 2084 dbg("%s", "Invalid Serial \n");
2085 return;
2086 }
2087
2088 mos7840_port = mos7840_get_port_private(port);
2089
2090 if (mos7840_port == NULL)
2091 return;
2092
3f542974 2093 if (!mos7840_port->open) {
441b62c1 2094 dbg("%s - port not opened", __func__);
3f542974
PS		 2095 return;
2096 }
2097
2098 dbg("%s\n", "setting termios - ");
2099
2100 cflag = tty->termios->c_cflag;
2101
441b62c1 2102 dbg("%s - clfag %08x iflag %08x", __func__,
3f542974 2103 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
441b62c1 2104 dbg("%s - old clfag %08x old iflag %08x", __func__,
3d3ddce5 2105 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
441b62c1 2106 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 2107
2108 /* change the port settings to the new ones specified */
2109
95da310e 2110 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2111
2112 if (!mos7840_port->read_urb) {
2113 dbg("%s", "URB KILLED !!!!!\n");
2114 return;
2115 }
2116
2117 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2118 mos7840_port->read_urb->dev = serial->dev;
2119 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2120 if (status) {
2121 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2122 status);
2123 }
2124 }
2125 return;
2126}
2127
2128/*****************************************************************************
2129 * mos7840_get_lsr_info - get line status register info
2130 *
2131 * Purpose: Let user call ioctl() to get info when the UART physically
2132 * is emptied. On bus types like RS485, the transmitter must
2133 * release the bus after transmitting. This must be done when
2134 * the transmit shift register is empty, not be done when the
2135 * transmit holding register is empty. This functionality
2136 * allows an RS485 driver to be written in user space.
2137 *****************************************************************************/
2138
95da310e 2139static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2140 unsigned int __user *value)
3f542974
PS		 2141{
2142 int count;
2143 unsigned int result = 0;
2144
95da310e 2145 count = mos7840_chars_in_buffer(tty);
3f542974 2146 if (count == 0) {
441b62c1 2147 dbg("%s -- Empty", __func__);
3f542974
PS		 2148 result = TIOCSER_TEMT;
2149 }
2150
2151 if (copy_to_user(value, &result, sizeof(int)))
2152 return -EFAULT;
2153 return 0;
2154}
2155
3f542974
PS		 2156/*****************************************************************************
2157 * mos7840_set_modem_info
2158 * function to set modem info
2159 *****************************************************************************/
2160
95da310e
AC		 2161/* FIXME: Should be using the model control hooks */
2162
3f542974 2163static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
97c4965d 2164 unsigned int cmd, unsigned int __user *value)
3f542974
PS		 2165{
2166 unsigned int mcr;
2167 unsigned int arg;
2168 __u16 Data;
2169 int status;
2170 struct usb_serial_port *port;
2171
2172 if (mos7840_port == NULL)
2173 return -1;
2174
2175 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 2176 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2177 dbg("%s", "Invalid port \n");
2178 return -1;
2179 }
2180
2181 mcr = mos7840_port->shadowMCR;
2182
2183 if (copy_from_user(&arg, value, sizeof(int)))
2184 return -EFAULT;
2185
2186 switch (cmd) {
2187 case TIOCMBIS:
2188 if (arg & TIOCM_RTS)
2189 mcr |= MCR_RTS;
2190 if (arg & TIOCM_DTR)
2191 mcr |= MCR_RTS;
2192 if (arg & TIOCM_LOOP)
2193 mcr |= MCR_LOOPBACK;
2194 break;
2195
2196 case TIOCMBIC:
2197 if (arg & TIOCM_RTS)
2198 mcr &= ~MCR_RTS;
2199 if (arg & TIOCM_DTR)
2200 mcr &= ~MCR_RTS;
2201 if (arg & TIOCM_LOOP)
2202 mcr &= ~MCR_LOOPBACK;
2203 break;
2204
2205 case TIOCMSET:
2206 /* turn off the RTS and DTR and LOOPBACK
2207 * and then only turn on what was asked to */
2208 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK);
2209 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0);
2210 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0);
2211 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0);
2212 break;
2213 }
2214
2215 mos7840_port->shadowMCR = mcr;
2216
2217 Data = mos7840_port->shadowMCR;
3f542974
PS		 2218 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2219 if (status < 0) {
2220 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
2221 return -1;
2222 }
2223
2224 return 0;
2225}
2226
2227/*****************************************************************************
2228 * mos7840_get_modem_info
2229 * function to get modem info
2230 *****************************************************************************/
2231
2232static int mos7840_get_modem_info(struct moschip_port *mos7840_port,
97c4965d 2233 unsigned int __user *value)
3f542974
PS		 2234{
2235 unsigned int result = 0;
2236 __u16 msr;
2237 unsigned int mcr = mos7840_port->shadowMCR;
880af9db 2238 mos7840_get_uart_reg(mos7840_port->port,
95da310e 2239 MODEM_STATUS_REGISTER, &msr);
3f542974
PS		 2240 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
2241 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
2242 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
2243 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */
2244 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
2245 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
2246
441b62c1 2247 dbg("%s -- %x", __func__, result);
3f542974
PS		 2248
2249 if (copy_to_user(value, &result, sizeof(int)))
2250 return -EFAULT;
2251 return 0;
2252}
2253
2254/*****************************************************************************
2255 * mos7840_get_serial_info
2256 * function to get information about serial port
2257 *****************************************************************************/
2258
2259static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2260 struct serial_struct __user *retinfo)
3f542974
PS		 2261{
2262 struct serial_struct tmp;
2263
2264 if (mos7840_port == NULL)
2265 return -1;
2266
2267 if (!retinfo)
2268 return -EFAULT;
2269
2270 memset(&tmp, 0, sizeof(tmp));
2271
2272 tmp.type = PORT_16550A;
2273 tmp.line = mos7840_port->port->serial->minor;
2274 tmp.port = mos7840_port->port->number;
2275 tmp.irq = 0;
2276 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2277 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2278 tmp.baud_base = 9600;
2279 tmp.close_delay = 5 * HZ;
2280 tmp.closing_wait = 30 * HZ;
2281
2282 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2283 return -EFAULT;
2284 return 0;
2285}
2286
2287/*****************************************************************************
2288 * SerialIoctl
2289 * this function handles any ioctl calls to the driver
2290 *****************************************************************************/
2291
95da310e 2292static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
3f542974
PS		 2293 unsigned int cmd, unsigned long arg)
2294{
95da310e 2295 struct usb_serial_port *port = tty->driver_data;
97c4965d 2296 void __user *argp = (void __user *)arg;
3f542974 2297 struct moschip_port *mos7840_port;
3f542974
PS		 2298
2299 struct async_icount cnow;
2300 struct async_icount cprev;
2301 struct serial_icounter_struct icount;
2302 int mosret = 0;
3f542974 2303
441b62c1 2304 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2305 dbg("%s", "Invalid port \n");
2306 return -1;
2307 }
2308
2309 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2310
2311 if (mos7840_port == NULL)
2312 return -1;
2313
441b62c1 2314 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
3f542974
PS		 2315
2316 switch (cmd) {
2317 /* return number of bytes available */
2318
3f542974 2319 case TIOCSERGETLSR:
441b62c1 2320 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
95da310e 2321 return mos7840_get_lsr_info(tty, argp);
3f542974
PS		 2322 return 0;
2323
95da310e 2324 /* FIXME: use the modem hooks and remove this */
3f542974
PS		 2325 case TIOCMBIS:
2326 case TIOCMBIC:
2327 case TIOCMSET:
441b62c1 2328 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__,
3f542974
PS		 2329 port->number);
2330 mosret =
97c4965d 2331 mos7840_set_modem_info(mos7840_port, cmd, argp);
3f542974
PS		 2332 return mosret;
2333
2334 case TIOCMGET:
441b62c1 2335 dbg("%s (%d) TIOCMGET", __func__, port->number);
97c4965d 2336 return mos7840_get_modem_info(mos7840_port, argp);
3f542974
PS		 2337
2338 case TIOCGSERIAL:
441b62c1 2339 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
97c4965d 2340 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2341
2342 case TIOCSSERIAL:
441b62c1 2343 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
3f542974
PS		 2344 break;
2345
2346 case TIOCMIWAIT:
441b62c1 2347 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
3f542974
PS		 2348 cprev = mos7840_port->icount;
2349 while (1) {
880af9db 2350 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974
PS		 2351 mos7840_port->delta_msr_cond = 0;
2352 wait_event_interruptible(mos7840_port->delta_msr_wait,
2353 (mos7840_port->
2354 delta_msr_cond == 1));
2355
2356 /* see if a signal did it */
2357 if (signal_pending(current))
2358 return -ERESTARTSYS;
2359 cnow = mos7840_port->icount;
0de9a702 2360 smp_rmb();
3f542974
PS		 2361 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2362 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2363 return -EIO; /* no change => error */
2364 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2365 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2366 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2367 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2368 return 0;
2369 }
2370 cprev = cnow;
2371 }
2372 /* NOTREACHED */
2373 break;
2374
2375 case TIOCGICOUNT:
2376 cnow = mos7840_port->icount;
0de9a702 2377 smp_rmb();
3f542974
PS		 2378 icount.cts = cnow.cts;
2379 icount.dsr = cnow.dsr;
2380 icount.rng = cnow.rng;
2381 icount.dcd = cnow.dcd;
2382 icount.rx = cnow.rx;
2383 icount.tx = cnow.tx;
2384 icount.frame = cnow.frame;
2385 icount.overrun = cnow.overrun;
2386 icount.parity = cnow.parity;
2387 icount.brk = cnow.brk;
2388 icount.buf_overrun = cnow.buf_overrun;
2389
441b62c1 2390 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
3f542974 2391 port->number, icount.rx, icount.tx);
97c4965d 2392 if (copy_to_user(argp, &icount, sizeof(icount)))
3f542974
PS		 2393 return -EFAULT;
2394 return 0;
3f542974
PS		 2395 default:
2396 break;
2397 }
3f542974
PS		 2398 return -ENOIOCTLCMD;
2399}
2400
2401static int mos7840_calc_num_ports(struct usb_serial *serial)
2402{
0de9a702 2403 int mos7840_num_ports = 0;
3f542974
PS		 2404
2405 dbg("numberofendpoints: %d \n",
2406 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
2407 dbg("numberofendpoints: %d \n",
2408 (int)serial->interface->altsetting->desc.bNumEndpoints);
2409 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
0de9a702 2410 mos7840_num_ports = serial->num_ports = 2;
3f542974 2411 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
0de9a702
ON		 2412 serial->num_bulk_in = 4;
2413 serial->num_bulk_out = 4;
2414 mos7840_num_ports = serial->num_ports = 4;
3f542974
PS		 2415 }
2416
2417 return mos7840_num_ports;
2418}
2419
2420/****************************************************************************
2421 * mos7840_startup
2422 ****************************************************************************/
2423
2424static int mos7840_startup(struct usb_serial *serial)
2425{
2426 struct moschip_port *mos7840_port;
2427 struct usb_device *dev;
2428 int i, status;
2429
2430 __u16 Data;
2431 dbg("%s \n", " mos7840_startup :entering..........");
2432
2433 if (!serial) {
2434 dbg("%s\n", "Invalid Handler");
2435 return -1;
2436 }
2437
2438 dev = serial->dev;
2439
2440 dbg("%s\n", "Entering...");
2441
2442 /* we set up the pointers to the endpoints in the mos7840_open *
2443 * function, as the structures aren't created yet. */
2444
2445 /* set up port private structures */
2446 for (i = 0; i < serial->num_ports; ++i) {
7ac9da10 2447 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
3f542974 2448 if (mos7840_port == NULL) {
441b62c1 2449 err("%s - Out of memory", __func__);
0de9a702
ON		 2450 status = -ENOMEM;
2451 i--; /* don't follow NULL pointer cleaning up */
2452 goto error;
3f542974 2453 }
3f542974 2454
880af9db
AC		 2455 /* Initialize all port interrupt end point to port 0 int
2456 * endpoint. Our device has only one interrupt end point
2457 * common to all port */
3f542974
PS		 2458
2459 mos7840_port->port = serial->port[i];
2460 mos7840_set_port_private(serial->port[i], mos7840_port);
0de9a702 2461 spin_lock_init(&mos7840_port->pool_lock);
3f542974
PS		 2462
2463 mos7840_port->port_num = ((serial->port[i]->number -
2464 (serial->port[i]->serial->minor)) +
2465 1);
2466
2467 if (mos7840_port->port_num == 1) {
2468 mos7840_port->SpRegOffset = 0x0;
2469 mos7840_port->ControlRegOffset = 0x1;
2470 mos7840_port->DcrRegOffset = 0x4;
2471 } else if ((mos7840_port->port_num == 2)
0de9a702 2472 && (serial->num_ports == 4)) {
3f542974
PS		 2473 mos7840_port->SpRegOffset = 0x8;
2474 mos7840_port->ControlRegOffset = 0x9;
2475 mos7840_port->DcrRegOffset = 0x16;
2476 } else if ((mos7840_port->port_num == 2)
0de9a702 2477 && (serial->num_ports == 2)) {
3f542974
PS		 2478 mos7840_port->SpRegOffset = 0xa;
2479 mos7840_port->ControlRegOffset = 0xb;
2480 mos7840_port->DcrRegOffset = 0x19;
2481 } else if ((mos7840_port->port_num == 3)
0de9a702 2482 && (serial->num_ports == 4)) {
3f542974
PS		 2483 mos7840_port->SpRegOffset = 0xa;
2484 mos7840_port->ControlRegOffset = 0xb;
2485 mos7840_port->DcrRegOffset = 0x19;
2486 } else if ((mos7840_port->port_num == 4)
0de9a702 2487 && (serial->num_ports == 4)) {
3f542974
PS		 2488 mos7840_port->SpRegOffset = 0xc;
2489 mos7840_port->ControlRegOffset = 0xd;
2490 mos7840_port->DcrRegOffset = 0x1c;
2491 }
2492 mos7840_dump_serial_port(mos7840_port);
3f542974
PS		 2493 mos7840_set_port_private(serial->port[i], mos7840_port);
2494
880af9db
AC		 2495 /* enable rx_disable bit in control register */
2496 status = mos7840_get_reg_sync(serial->port[i],
2497 mos7840_port->ControlRegOffset, &Data);
3f542974
PS		 2498 if (status < 0) {
2499 dbg("Reading ControlReg failed status-0x%x\n", status);
2500 break;
2501 } else
2502 dbg("ControlReg Reading success val is %x, status%d\n",
2503 Data, status);
880af9db
AC		 2504 Data |= 0x08; /* setting driver done bit */
2505 Data |= 0x04; /* sp1_bit to have cts change reflect in
2506 modem status reg */
3f542974 2507
880af9db
AC		 2508 /* Data |= 0x20; //rx_disable bit */
2509 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2510 mos7840_port->ControlRegOffset, Data);
2511 if (status < 0) {
2512 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2513 break;
2514 } else
2515 dbg("ControlReg Writing success(rx_disable) status%d\n",
2516 status);
2517
880af9db
AC		 2518 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2519 and 0x24 in DCR3 */
3f542974 2520 Data = 0x01;
880af9db
AC		 2521 status = mos7840_set_reg_sync(serial->port[i],
2522 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
3f542974
PS		 2523 if (status < 0) {
2524 dbg("Writing DCR0 failed status-0x%x\n", status);
2525 break;
2526 } else
2527 dbg("DCR0 Writing success status%d\n", status);
2528
2529 Data = 0x05;
880af9db
AC		 2530 status = mos7840_set_reg_sync(serial->port[i],
2531 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
3f542974
PS		 2532 if (status < 0) {
2533 dbg("Writing DCR1 failed status-0x%x\n", status);
2534 break;
2535 } else
2536 dbg("DCR1 Writing success status%d\n", status);
2537
2538 Data = 0x24;
880af9db
AC		 2539 status = mos7840_set_reg_sync(serial->port[i],
2540 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
3f542974
PS		 2541 if (status < 0) {
2542 dbg("Writing DCR2 failed status-0x%x\n", status);
2543 break;
2544 } else
2545 dbg("DCR2 Writing success status%d\n", status);
2546
880af9db 2547 /* write values in clkstart0x0 and clkmulti 0x20 */
3f542974 2548 Data = 0x0;
880af9db 2549 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2550 CLK_START_VALUE_REGISTER, Data);
2551 if (status < 0) {
2552 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2553 break;
2554 } else
2555 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2556
2557 Data = 0x20;
880af9db
AC		 2558 status = mos7840_set_reg_sync(serial->port[i],
2559 CLK_MULTI_REGISTER, Data);
3f542974
PS		 2560 if (status < 0) {
2561 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
2562 status);
0de9a702 2563 goto error;
3f542974
PS		 2564 } else
2565 dbg("CLK_MULTI_REGISTER Writing success status%d\n",
2566 status);
2567
880af9db 2568 /* write value 0x0 to scratchpad register */
3f542974 2569 Data = 0x00;
880af9db
AC		 2570 status = mos7840_set_uart_reg(serial->port[i],
2571 SCRATCH_PAD_REGISTER, Data);
3f542974
PS		 2572 if (status < 0) {
2573 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
2574 status);
2575 break;
2576 } else
2577 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
2578 status);
2579
880af9db 2580 /* Zero Length flag register */
3f542974 2581 if ((mos7840_port->port_num != 1)
0de9a702 2582 && (serial->num_ports == 2)) {
3f542974
PS		 2583
2584 Data = 0xff;
3f542974 2585 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2586 (__u16) (ZLP_REG1 +
2587 ((__u16)mos7840_port->port_num)), Data);
3f542974
PS		 2588 dbg("ZLIP offset%x\n",
2589 (__u16) (ZLP_REG1 +
880af9db 2590 ((__u16) mos7840_port->port_num)));
3f542974
PS		 2591 if (status < 0) {
2592 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2593 i + 2, status);
2594 break;
2595 } else
2596 dbg("ZLP_REG%d Writing success status%d\n",
2597 i + 2, status);
2598 } else {
2599 Data = 0xff;
3f542974 2600 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2601 (__u16) (ZLP_REG1 +
2602 ((__u16)mos7840_port->port_num) - 0x1), Data);
3f542974
PS		 2603 dbg("ZLIP offset%x\n",
2604 (__u16) (ZLP_REG1 +
2605 ((__u16) mos7840_port->port_num) - 0x1));
2606 if (status < 0) {
2607 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2608 i + 1, status);
2609 break;
2610 } else
2611 dbg("ZLP_REG%d Writing success status%d\n",
2612 i + 1, status);
2613
2614 }
0de9a702 2615 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974 2616 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
880af9db
AC		 2617 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2618 GFP_KERNEL);
2619 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2620 !mos7840_port->dr) {
0de9a702
ON		 2621 status = -ENOMEM;
2622 goto error;
2623 }
3f542974
PS		 2624 }
2625
880af9db 2626 /* Zero Length flag enable */
3f542974 2627 Data = 0x0f;
3f542974
PS		 2628 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2629 if (status < 0) {
2630 dbg("Writing ZLP_REG5 failed status-0x%x\n", status);
7ced46c3 2631 goto error;
3f542974
PS		 2632 } else
2633 dbg("ZLP_REG5 Writing success status%d\n", status);
2634
2635 /* setting configuration feature to one */
2636 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
97c4965d 2637 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
3f542974 2638 return 0;
0de9a702
ON		 2639error:
2640 for (/* nothing */; i >= 0; i--) {
2641 mos7840_port = mos7840_get_port_private(serial->port[i]);
2642
2643 kfree(mos7840_port->dr);
2644 kfree(mos7840_port->ctrl_buf);
2645 usb_free_urb(mos7840_port->control_urb);
2646 kfree(mos7840_port);
2647 serial->port[i] = NULL;
2648 }
2649 return status;
3f542974
PS		 2650}
2651
2652/****************************************************************************
2653 * mos7840_shutdown
2654 * This function is called whenever the device is removed from the usb bus.
2655 ****************************************************************************/
2656
2657static void mos7840_shutdown(struct usb_serial *serial)
2658{
2659 int i;
0de9a702 2660 unsigned long flags;
3f542974
PS		 2661 struct moschip_port *mos7840_port;
2662 dbg("%s \n", " shutdown :entering..........");
2663
2664 if (!serial) {
2665 dbg("%s", "Invalid Handler \n");
2666 return;
2667 }
2668
880af9db 2669 /* check for the ports to be closed,close the ports and disconnect */
3f542974
PS		 2670
2671 /* free private structure allocated for serial port *
2672 * stop reads and writes on all ports */
2673
2674 for (i = 0; i < serial->num_ports; ++i) {
2675 mos7840_port = mos7840_get_port_private(serial->port[i]);
0de9a702
ON		 2676 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2677 mos7840_port->zombie = 1;
2678 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 2679 usb_kill_urb(mos7840_port->control_urb);
0de9a702
ON		 2680 kfree(mos7840_port->ctrl_buf);
2681 kfree(mos7840_port->dr);
3f542974
PS		 2682 kfree(mos7840_port);
2683 mos7840_set_port_private(serial->port[i], NULL);
2684 }
2685
2686 dbg("%s\n", "Thank u :: ");
2687
2688}
2689
d9b1b787
JH		 2690static struct usb_driver io_driver = {
2691 .name = "mos7840",
2692 .probe = usb_serial_probe,
2693 .disconnect = usb_serial_disconnect,
2694 .id_table = moschip_id_table_combined,
2695 .no_dynamic_id = 1,
2696};
2697
3f542974
PS		 2698static struct usb_serial_driver moschip7840_4port_device = {
2699 .driver = {
2700 .owner = THIS_MODULE,
2701 .name = "mos7840",
2702 },
2703 .description = DRIVER_DESC,
d9b1b787 2704 .usb_driver = &io_driver,
3f542974 2705 .id_table = moschip_port_id_table,
3f542974 2706 .num_ports = 4,
3f542974
PS		 2707 .open = mos7840_open,
2708 .close = mos7840_close,
2709 .write = mos7840_write,
2710 .write_room = mos7840_write_room,
2711 .chars_in_buffer = mos7840_chars_in_buffer,
2712 .throttle = mos7840_throttle,
2713 .unthrottle = mos7840_unthrottle,
2714 .calc_num_ports = mos7840_calc_num_ports,
2715#ifdef MCSSerialProbe
2716 .probe = mos7840_serial_probe,
2717#endif
2718 .ioctl = mos7840_ioctl,
2719 .set_termios = mos7840_set_termios,
2720 .break_ctl = mos7840_break,
2721 .tiocmget = mos7840_tiocmget,
2722 .tiocmset = mos7840_tiocmset,
2723 .attach = mos7840_startup,
2724 .shutdown = mos7840_shutdown,
2725 .read_bulk_callback = mos7840_bulk_in_callback,
2726 .read_int_callback = mos7840_interrupt_callback,
2727};
2728
3f542974
PS		 2729/****************************************************************************
2730 * moschip7840_init
2731 * This is called by the module subsystem, or on startup to initialize us
2732 ****************************************************************************/
2733static int __init moschip7840_init(void)
2734{
2735 int retval;
2736
2737 dbg("%s \n", " mos7840_init :entering..........");
2738
2739 /* Register with the usb serial */
2740 retval = usb_serial_register(&moschip7840_4port_device);
2741
2742 if (retval)
2743 goto failed_port_device_register;
2744
2745 dbg("%s\n", "Entring...");
2746 info(DRIVER_DESC " " DRIVER_VERSION);
2747
2748 /* Register with the usb */
2749 retval = usb_register(&io_driver);
3f542974
PS		 2750 if (retval == 0) {
2751 dbg("%s\n", "Leaving...");
2752 return 0;
2753 }
3f542974 2754 usb_serial_deregister(&moschip7840_4port_device);
880af9db 2755failed_port_device_register:
3f542974
PS		 2756 return retval;
2757}
2758
2759/****************************************************************************
2760 * moschip7840_exit
2761 * Called when the driver is about to be unloaded.
2762 ****************************************************************************/
2763static void __exit moschip7840_exit(void)
2764{
2765
2766 dbg("%s \n", " mos7840_exit :entering..........");
2767
2768 usb_deregister(&io_driver);
2769
2770 usb_serial_deregister(&moschip7840_4port_device);
2771
2772 dbg("%s\n", "Entring...");
2773}
2774
2775module_init(moschip7840_init);
2776module_exit(moschip7840_exit);
2777
2778/* Module information */
2779MODULE_DESCRIPTION(DRIVER_DESC);
2780MODULE_LICENSE("GPL");
2781
2782module_param(debug, bool, S_IRUGO | S_IWUSR);
2783MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux kernel - Deliverables
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