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USB: isp1760: Fix probe in PCI glue code
[mirror_ubuntu-bionic-kernel.git] / drivers / usb / serial / mos7840.c
CommitLineData
3f542974
PS		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 *
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
18 *
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
22 *
23 */
24
25#include <linux/kernel.h>
26#include <linux/errno.h>
27#include <linux/init.h>
28#include <linux/slab.h>
29#include <linux/tty.h>
30#include <linux/tty_driver.h>
31#include <linux/tty_flip.h>
32#include <linux/module.h>
33#include <linux/serial.h>
34#include <linux/usb.h>
35#include <linux/usb/serial.h>
880af9db 36#include <linux/uaccess.h>
3f542974
PS		 37
38/*
39 * Version Information
40 */
41#define DRIVER_VERSION "1.3.1"
42#define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
43
44/*
45 * 16C50 UART register defines
46 */
47
48#define LCR_BITS_5 0x00 /* 5 bits/char */
49#define LCR_BITS_6 0x01 /* 6 bits/char */
50#define LCR_BITS_7 0x02 /* 7 bits/char */
51#define LCR_BITS_8 0x03 /* 8 bits/char */
52#define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
53
54#define LCR_STOP_1 0x00 /* 1 stop bit */
55#define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
56#define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
57#define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
58
59#define LCR_PAR_NONE 0x00 /* No parity */
60#define LCR_PAR_ODD 0x08 /* Odd parity */
61#define LCR_PAR_EVEN 0x18 /* Even parity */
62#define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
63#define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
64#define LCR_PAR_MASK 0x38 /* Mask for parity field */
65
66#define LCR_SET_BREAK 0x40 /* Set Break condition */
67#define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
68
69#define MCR_DTR 0x01 /* Assert DTR */
70#define MCR_RTS 0x02 /* Assert RTS */
71#define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
72#define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
73#define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
74#define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
75
76#define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
77#define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
78#define MOS7840_MSR_RI 0x40 /* Current state of RI */
79#define MOS7840_MSR_CD 0x80 /* Current state of CD */
80
81/*
82 * Defines used for sending commands to port
83 */
84
880af9db
AC		 85#define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
86#define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
3f542974
PS		 87
88#define MOS_PORT1 0x0200
89#define MOS_PORT2 0x0300
90#define MOS_VENREG 0x0000
91#define MOS_MAX_PORT 0x02
92#define MOS_WRITE 0x0E
93#define MOS_READ 0x0D
94
95/* Requests */
96#define MCS_RD_RTYPE 0xC0
97#define MCS_WR_RTYPE 0x40
98#define MCS_RDREQ 0x0D
99#define MCS_WRREQ 0x0E
100#define MCS_CTRL_TIMEOUT 500
101#define VENDOR_READ_LENGTH (0x01)
102
103#define MAX_NAME_LEN 64
104
880af9db
AC		 105#define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
106#define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
3f542974
PS		 107
108/* For higher baud Rates use TIOCEXBAUD */
109#define TIOCEXBAUD 0x5462
110
111/* vendor id and device id defines */
112
11e1abb4 113/* The native mos7840/7820 component */
3f542974
PS		 114#define USB_VENDOR_ID_MOSCHIP 0x9710
115#define MOSCHIP_DEVICE_ID_7840 0x7840
116#define MOSCHIP_DEVICE_ID_7820 0x7820
11e1abb4
DL		 117/* The native component can have its vendor/device id's overridden
118 * in vendor-specific implementations. Such devices can be handled
119 * by making a change here, in moschip_port_id_table, and in
120 * moschip_id_table_combined
121 */
122#define USB_VENDOR_ID_BANDB 0x0856
123#define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
124#define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
3f542974 125
11e1abb4 126/* Interrupt Routine Defines */
3f542974
PS		 127
128#define SERIAL_IIR_RLS 0x06
129#define SERIAL_IIR_MS 0x00
130
131/*
132 * Emulation of the bit mask on the LINE STATUS REGISTER.
133 */
134#define SERIAL_LSR_DR 0x0001
135#define SERIAL_LSR_OE 0x0002
136#define SERIAL_LSR_PE 0x0004
137#define SERIAL_LSR_FE 0x0008
138#define SERIAL_LSR_BI 0x0010
139
140#define MOS_MSR_DELTA_CTS 0x10
141#define MOS_MSR_DELTA_DSR 0x20
142#define MOS_MSR_DELTA_RI 0x40
143#define MOS_MSR_DELTA_CD 0x80
144
880af9db 145/* Serial Port register Address */
3f542974
PS		 146#define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
147#define FIFO_CONTROL_REGISTER ((__u16)(0x02))
148#define LINE_CONTROL_REGISTER ((__u16)(0x03))
149#define MODEM_CONTROL_REGISTER ((__u16)(0x04))
150#define LINE_STATUS_REGISTER ((__u16)(0x05))
151#define MODEM_STATUS_REGISTER ((__u16)(0x06))
152#define SCRATCH_PAD_REGISTER ((__u16)(0x07))
153#define DIVISOR_LATCH_LSB ((__u16)(0x00))
154#define DIVISOR_LATCH_MSB ((__u16)(0x01))
155
156#define CLK_MULTI_REGISTER ((__u16)(0x02))
157#define CLK_START_VALUE_REGISTER ((__u16)(0x03))
158
159#define SERIAL_LCR_DLAB ((__u16)(0x0080))
160
161/*
162 * URB POOL related defines
163 */
164#define NUM_URBS 16 /* URB Count */
165#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
166
167
168static struct usb_device_id moschip_port_id_table[] = {
169 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
170 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
11e1abb4
DL		 171 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
172 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
3f542974
PS		 173 {} /* terminating entry */
174};
175
176static __devinitdata struct usb_device_id moschip_id_table_combined[] = {
177 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
178 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
11e1abb4
DL		 179 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
180 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
3f542974
PS		 181 {} /* terminating entry */
182};
183
184MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
185
186/* This structure holds all of the local port information */
187
188struct moschip_port {
189 int port_num; /*Actual port number in the device(1,2,etc) */
190 struct urb *write_urb; /* write URB for this port */
191 struct urb *read_urb; /* read URB for this port */
0de9a702 192 struct urb *int_urb;
3f542974
PS		 193 __u8 shadowLCR; /* last LCR value received */
194 __u8 shadowMCR; /* last MCR value received */
195 char open;
0de9a702
ON		 196 char open_ports;
197 char zombie;
3f542974
PS		 198 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
199 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
200 int delta_msr_cond;
201 struct async_icount icount;
202 struct usb_serial_port *port; /* loop back to the owner of this object */
203
880af9db 204 /* Offsets */
3f542974
PS		 205 __u8 SpRegOffset;
206 __u8 ControlRegOffset;
207 __u8 DcrRegOffset;
880af9db 208 /* for processing control URBS in interrupt context */
3f542974 209 struct urb *control_urb;
0de9a702 210 struct usb_ctrlrequest *dr;
3f542974
PS		 211 char *ctrl_buf;
212 int MsrLsr;
213
0de9a702 214 spinlock_t pool_lock;
3f542974 215 struct urb *write_urb_pool[NUM_URBS];
0de9a702 216 char busy[NUM_URBS];
3f542974
PS		 217};
218
219
220static int debug;
3f542974
PS		 221
222/*
223 * mos7840_set_reg_sync
224 * To set the Control register by calling usb_fill_control_urb function
225 * by passing usb_sndctrlpipe function as parameter.
226 */
227
228static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
229 __u16 val)
230{
231 struct usb_device *dev = port->serial->dev;
232 val = val & 0x00ff;
233 dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
234
235 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
236 MCS_WR_RTYPE, val, reg, NULL, 0,
237 MOS_WDR_TIMEOUT);
238}
239
240/*
241 * mos7840_get_reg_sync
242 * To set the Uart register by calling usb_fill_control_urb function by
243 * passing usb_rcvctrlpipe function as parameter.
244 */
245
246static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
880af9db 247 __u16 *val)
3f542974
PS		 248{
249 struct usb_device *dev = port->serial->dev;
250 int ret = 0;
251
252 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
253 MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH,
254 MOS_WDR_TIMEOUT);
255 dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val);
256 *val = (*val) & 0x00ff;
257 return ret;
258}
259
260/*
261 * mos7840_set_uart_reg
262 * To set the Uart register by calling usb_fill_control_urb function by
263 * passing usb_sndctrlpipe function as parameter.
264 */
265
266static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
267 __u16 val)
268{
269
270 struct usb_device *dev = port->serial->dev;
271 val = val & 0x00ff;
880af9db
AC		 272 /* For the UART control registers, the application number need
273 to be Or'ed */
0de9a702 274 if (port->serial->num_ports == 4) {
880af9db
AC		 275 val |= (((__u16) port->number -
276 (__u16) (port->serial->minor)) + 1) << 8;
3f542974
PS		 277 dbg("mos7840_set_uart_reg application number is %x\n", val);
278 } else {
279 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 280 val |= (((__u16) port->number -
3f542974
PS		 281 (__u16) (port->serial->minor)) + 1) << 8;
282 dbg("mos7840_set_uart_reg application number is %x\n",
283 val);
284 } else {
285 val |=
286 (((__u16) port->number -
287 (__u16) (port->serial->minor)) + 2) << 8;
288 dbg("mos7840_set_uart_reg application number is %x\n",
289 val);
290 }
291 }
292 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
293 MCS_WR_RTYPE, val, reg, NULL, 0,
294 MOS_WDR_TIMEOUT);
295
296}
297
298/*
299 * mos7840_get_uart_reg
300 * To set the Control register by calling usb_fill_control_urb function
301 * by passing usb_rcvctrlpipe function as parameter.
302 */
303static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
880af9db 304 __u16 *val)
3f542974
PS		 305{
306 struct usb_device *dev = port->serial->dev;
307 int ret = 0;
308 __u16 Wval;
309
880af9db
AC		 310 /* dbg("application number is %4x \n",
311 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
312 /* Wval is same as application number */
0de9a702 313 if (port->serial->num_ports == 4) {
3f542974
PS		 314 Wval =
315 (((__u16) port->number - (__u16) (port->serial->minor)) +
316 1) << 8;
317 dbg("mos7840_get_uart_reg application number is %x\n", Wval);
318 } else {
319 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 320 Wval = (((__u16) port->number -
3f542974
PS		 321 (__u16) (port->serial->minor)) + 1) << 8;
322 dbg("mos7840_get_uart_reg application number is %x\n",
323 Wval);
324 } else {
880af9db 325 Wval = (((__u16) port->number -
3f542974
PS		 326 (__u16) (port->serial->minor)) + 2) << 8;
327 dbg("mos7840_get_uart_reg application number is %x\n",
328 Wval);
329 }
330 }
331 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
332 MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH,
333 MOS_WDR_TIMEOUT);
334 *val = (*val) & 0x00ff;
335 return ret;
336}
337
338static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
339{
340
341 dbg("***************************************\n");
342 dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
343 dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset);
344 dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset);
345 dbg("***************************************\n");
346
347}
348
349/************************************************************************/
350/************************************************************************/
351/* I N T E R F A C E F U N C T I O N S */
352/* I N T E R F A C E F U N C T I O N S */
353/************************************************************************/
354/************************************************************************/
355
356static inline void mos7840_set_port_private(struct usb_serial_port *port,
357 struct moschip_port *data)
358{
359 usb_set_serial_port_data(port, (void *)data);
360}
361
362static inline struct moschip_port *mos7840_get_port_private(struct
363 usb_serial_port
364 *port)
365{
366 return (struct moschip_port *)usb_get_serial_port_data(port);
367}
368
0de9a702 369static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
3f542974
PS		 370{
371 struct moschip_port *mos7840_port;
372 struct async_icount *icount;
373 mos7840_port = port;
374 icount = &mos7840_port->icount;
375 if (new_msr &
376 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
377 MOS_MSR_DELTA_CD)) {
378 icount = &mos7840_port->icount;
379
380 /* update input line counters */
381 if (new_msr & MOS_MSR_DELTA_CTS) {
382 icount->cts++;
0de9a702 383 smp_wmb();
3f542974
PS		 384 }
385 if (new_msr & MOS_MSR_DELTA_DSR) {
386 icount->dsr++;
0de9a702 387 smp_wmb();
3f542974
PS		 388 }
389 if (new_msr & MOS_MSR_DELTA_CD) {
390 icount->dcd++;
0de9a702 391 smp_wmb();
3f542974
PS		 392 }
393 if (new_msr & MOS_MSR_DELTA_RI) {
394 icount->rng++;
0de9a702 395 smp_wmb();
3f542974
PS		 396 }
397 }
3f542974
PS		 398}
399
0de9a702 400static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
3f542974
PS		 401{
402 struct async_icount *icount;
403
441b62c1 404 dbg("%s - %02x", __func__, new_lsr);
3f542974
PS		 405
406 if (new_lsr & SERIAL_LSR_BI) {
880af9db
AC		 407 /*
408 * Parity and Framing errors only count if they
409 * occur exclusive of a break being
410 * received.
411 */
3f542974
PS		 412 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
413 }
414
415 /* update input line counters */
416 icount = &port->icount;
417 if (new_lsr & SERIAL_LSR_BI) {
418 icount->brk++;
0de9a702 419 smp_wmb();
3f542974
PS		 420 }
421 if (new_lsr & SERIAL_LSR_OE) {
422 icount->overrun++;
0de9a702 423 smp_wmb();
3f542974
PS		 424 }
425 if (new_lsr & SERIAL_LSR_PE) {
426 icount->parity++;
0de9a702 427 smp_wmb();
3f542974
PS		 428 }
429 if (new_lsr & SERIAL_LSR_FE) {
430 icount->frame++;
0de9a702 431 smp_wmb();
3f542974 432 }
3f542974
PS		 433}
434
435/************************************************************************/
436/************************************************************************/
437/* U S B C A L L B A C K F U N C T I O N S */
438/* U S B C A L L B A C K F U N C T I O N S */
439/************************************************************************/
440/************************************************************************/
441
7d12e780 442static void mos7840_control_callback(struct urb *urb)
3f542974
PS		 443{
444 unsigned char *data;
445 struct moschip_port *mos7840_port;
446 __u8 regval = 0x0;
0de9a702 447 int result = 0;
0643c724 448 int status = urb->status;
3f542974 449
cdc97792 450 mos7840_port = urb->context;
0de9a702 451
0643c724 452 switch (status) {
3f542974
PS		 453 case 0:
454 /* success */
455 break;
456 case -ECONNRESET:
457 case -ENOENT:
458 case -ESHUTDOWN:
459 /* this urb is terminated, clean up */
441b62c1 460 dbg("%s - urb shutting down with status: %d", __func__,
0643c724 461 status);
3f542974
PS		 462 return;
463 default:
441b62c1 464 dbg("%s - nonzero urb status received: %d", __func__,
0643c724 465 status);
3f542974
PS		 466 goto exit;
467 }
468
441b62c1
HH		 469 dbg("%s urb buffer size is %d\n", __func__, urb->actual_length);
470 dbg("%s mos7840_port->MsrLsr is %d port %d\n", __func__,
3f542974
PS		 471 mos7840_port->MsrLsr, mos7840_port->port_num);
472 data = urb->transfer_buffer;
473 regval = (__u8) data[0];
441b62c1 474 dbg("%s data is %x\n", __func__, regval);
3f542974
PS		 475 if (mos7840_port->MsrLsr == 0)
476 mos7840_handle_new_msr(mos7840_port, regval);
477 else if (mos7840_port->MsrLsr == 1)
478 mos7840_handle_new_lsr(mos7840_port, regval);
479
0de9a702
ON		 480exit:
481 spin_lock(&mos7840_port->pool_lock);
482 if (!mos7840_port->zombie)
483 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
484 spin_unlock(&mos7840_port->pool_lock);
485 if (result) {
486 dev_err(&urb->dev->dev,
487 "%s - Error %d submitting interrupt urb\n",
441b62c1 488 __func__, result);
0de9a702 489 }
3f542974
PS		 490}
491
492static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
880af9db 493 __u16 *val)
3f542974
PS		 494{
495 struct usb_device *dev = mcs->port->serial->dev;
0de9a702
ON		 496 struct usb_ctrlrequest *dr = mcs->dr;
497 unsigned char *buffer = mcs->ctrl_buf;
498 int ret;
3f542974 499
3f542974
PS		 500 dr->bRequestType = MCS_RD_RTYPE;
501 dr->bRequest = MCS_RDREQ;
880af9db 502 dr->wValue = cpu_to_le16(Wval); /* 0 */
3f542974
PS		 503 dr->wIndex = cpu_to_le16(reg);
504 dr->wLength = cpu_to_le16(2);
505
506 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
507 (unsigned char *)dr, buffer, 2,
508 mos7840_control_callback, mcs);
509 mcs->control_urb->transfer_buffer_length = 2;
510 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
511 return ret;
512}
513
514/*****************************************************************************
515 * mos7840_interrupt_callback
516 * this is the callback function for when we have received data on the
517 * interrupt endpoint.
518 *****************************************************************************/
519
7d12e780 520static void mos7840_interrupt_callback(struct urb *urb)
3f542974
PS		 521{
522 int result;
523 int length;
524 struct moschip_port *mos7840_port;
525 struct usb_serial *serial;
526 __u16 Data;
527 unsigned char *data;
528 __u8 sp[5], st;
0de9a702
ON		 529 int i, rv = 0;
530 __u16 wval, wreg = 0;
0643c724 531 int status = urb->status;
3f542974
PS		 532
533 dbg("%s", " : Entering\n");
3f542974 534
0643c724 535 switch (status) {
3f542974
PS		 536 case 0:
537 /* success */
538 break;
539 case -ECONNRESET:
540 case -ENOENT:
541 case -ESHUTDOWN:
542 /* this urb is terminated, clean up */
441b62c1 543 dbg("%s - urb shutting down with status: %d", __func__,
0643c724 544 status);
3f542974
PS		 545 return;
546 default:
441b62c1 547 dbg("%s - nonzero urb status received: %d", __func__,
0643c724 548 status);
3f542974
PS		 549 goto exit;
550 }
551
552 length = urb->actual_length;
553 data = urb->transfer_buffer;
554
cdc97792 555 serial = urb->context;
3f542974
PS		 556
557 /* Moschip get 5 bytes
558 * Byte 1 IIR Port 1 (port.number is 0)
559 * Byte 2 IIR Port 2 (port.number is 1)
560 * Byte 3 IIR Port 3 (port.number is 2)
561 * Byte 4 IIR Port 4 (port.number is 3)
562 * Byte 5 FIFO status for both */
563
564 if (length && length > 5) {
565 dbg("%s \n", "Wrong data !!!");
566 return;
567 }
568
569 sp[0] = (__u8) data[0];
570 sp[1] = (__u8) data[1];
571 sp[2] = (__u8) data[2];
572 sp[3] = (__u8) data[3];
573 st = (__u8) data[4];
574
575 for (i = 0; i < serial->num_ports; i++) {
576 mos7840_port = mos7840_get_port_private(serial->port[i]);
577 wval =
578 (((__u16) serial->port[i]->number -
579 (__u16) (serial->minor)) + 1) << 8;
580 if (mos7840_port->open) {
581 if (sp[i] & 0x01) {
582 dbg("SP%d No Interrupt !!!\n", i);
583 } else {
584 switch (sp[i] & 0x0f) {
585 case SERIAL_IIR_RLS:
586 dbg("Serial Port %d: Receiver status error or ", i);
587 dbg("address bit detected in 9-bit mode\n");
588 mos7840_port->MsrLsr = 1;
0de9a702 589 wreg = LINE_STATUS_REGISTER;
3f542974
PS		 590 break;
591 case SERIAL_IIR_MS:
592 dbg("Serial Port %d: Modem status change\n", i);
593 mos7840_port->MsrLsr = 0;
0de9a702 594 wreg = MODEM_STATUS_REGISTER;
3f542974
PS		 595 break;
596 }
0de9a702
ON		 597 spin_lock(&mos7840_port->pool_lock);
598 if (!mos7840_port->zombie) {
599 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
600 } else {
601 spin_unlock(&mos7840_port->pool_lock);
602 return;
603 }
604 spin_unlock(&mos7840_port->pool_lock);
3f542974
PS		 605 }
606 }
607 }
880af9db
AC		 608 if (!(rv < 0))
609 /* the completion handler for the control urb will resubmit */
0de9a702
ON		 610 return;
611exit:
3f542974
PS		 612 result = usb_submit_urb(urb, GFP_ATOMIC);
613 if (result) {
614 dev_err(&urb->dev->dev,
615 "%s - Error %d submitting interrupt urb\n",
441b62c1 616 __func__, result);
3f542974 617 }
3f542974
PS		 618}
619
620static int mos7840_port_paranoia_check(struct usb_serial_port *port,
621 const char *function)
622{
623 if (!port) {
624 dbg("%s - port == NULL", function);
625 return -1;
626 }
627 if (!port->serial) {
628 dbg("%s - port->serial == NULL", function);
629 return -1;
630 }
631
632 return 0;
633}
634
635/* Inline functions to check the sanity of a pointer that is passed to us */
636static int mos7840_serial_paranoia_check(struct usb_serial *serial,
637 const char *function)
638{
639 if (!serial) {
640 dbg("%s - serial == NULL", function);
641 return -1;
642 }
643 if (!serial->type) {
644 dbg("%s - serial->type == NULL!", function);
645 return -1;
646 }
647
648 return 0;
649}
650
651static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
652 const char *function)
653{
654 /* if no port was specified, or it fails a paranoia check */
655 if (!port ||
656 mos7840_port_paranoia_check(port, function) ||
657 mos7840_serial_paranoia_check(port->serial, function)) {
880af9db
AC		 658 /* then say that we don't have a valid usb_serial thing,
659 * which will end up genrating -ENODEV return values */
3f542974
PS		 660 return NULL;
661 }
662
663 return port->serial;
664}
665
666/*****************************************************************************
667 * mos7840_bulk_in_callback
668 * this is the callback function for when we have received data on the
669 * bulk in endpoint.
670 *****************************************************************************/
671
7d12e780 672static void mos7840_bulk_in_callback(struct urb *urb)
3f542974 673{
0643c724 674 int retval;
3f542974
PS		 675 unsigned char *data;
676 struct usb_serial *serial;
677 struct usb_serial_port *port;
678 struct moschip_port *mos7840_port;
679 struct tty_struct *tty;
0643c724 680 int status = urb->status;
3f542974 681
0643c724
GKH		 682 if (status) {
683 dbg("nonzero read bulk status received: %d", status);
3f542974
PS		 684 return;
685 }
686
cdc97792 687 mos7840_port = urb->context;
3f542974
PS		 688 if (!mos7840_port) {
689 dbg("%s", "NULL mos7840_port pointer \n");
690 return;
691 }
692
693 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 694 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 695 dbg("%s", "Port Paranoia failed \n");
696 return;
697 }
698
441b62c1 699 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 700 if (!serial) {
701 dbg("%s\n", "Bad serial pointer ");
702 return;
703 }
704
705 dbg("%s\n", "Entering... \n");
706
707 data = urb->transfer_buffer;
708
709 dbg("%s", "Entering ........... \n");
710
711 if (urb->actual_length) {
4a90f09b 712 tty = tty_port_tty_get(&mos7840_port->port->port);
3f542974
PS		 713 if (tty) {
714 tty_buffer_request_room(tty, urb->actual_length);
715 tty_insert_flip_string(tty, data, urb->actual_length);
716 dbg(" %s \n", data);
717 tty_flip_buffer_push(tty);
4a90f09b 718 tty_kref_put(tty);
3f542974
PS		 719 }
720 mos7840_port->icount.rx += urb->actual_length;
0de9a702 721 smp_wmb();
3f542974
PS		 722 dbg("mos7840_port->icount.rx is %d:\n",
723 mos7840_port->icount.rx);
724 }
725
726 if (!mos7840_port->read_urb) {
727 dbg("%s", "URB KILLED !!!\n");
728 return;
729 }
730
3f542974 731
0de9a702 732 mos7840_port->read_urb->dev = serial->dev;
3f542974 733
0643c724 734 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
0de9a702 735
0643c724
GKH		 736 if (retval) {
737 dbg(" usb_submit_urb(read bulk) failed, retval = %d",
738 retval);
3f542974
PS		 739 }
740}
741
742/*****************************************************************************
743 * mos7840_bulk_out_data_callback
880af9db
AC		 744 * this is the callback function for when we have finished sending
745 * serial data on the bulk out endpoint.
3f542974
PS		 746 *****************************************************************************/
747
7d12e780 748static void mos7840_bulk_out_data_callback(struct urb *urb)
3f542974
PS		 749{
750 struct moschip_port *mos7840_port;
751 struct tty_struct *tty;
0643c724 752 int status = urb->status;
0de9a702
ON		 753 int i;
754
cdc97792 755 mos7840_port = urb->context;
0de9a702
ON		 756 spin_lock(&mos7840_port->pool_lock);
757 for (i = 0; i < NUM_URBS; i++) {
758 if (urb == mos7840_port->write_urb_pool[i]) {
759 mos7840_port->busy[i] = 0;
760 break;
761 }
762 }
763 spin_unlock(&mos7840_port->pool_lock);
764
0643c724
GKH		 765 if (status) {
766 dbg("nonzero write bulk status received:%d\n", status);
3f542974
PS		 767 return;
768 }
769
441b62c1 770 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
3f542974
PS		 771 dbg("%s", "Port Paranoia failed \n");
772 return;
773 }
774
775 dbg("%s \n", "Entering .........");
776
4a90f09b 777 tty = tty_port_tty_get(&mos7840_port->port->port);
b963a844
JS		 778 if (tty && mos7840_port->open)
779 tty_wakeup(tty);
4a90f09b 780 tty_kref_put(tty);
3f542974
PS		 781
782}
783
784/************************************************************************/
785/* D R I V E R T T Y I N T E R F A C E F U N C T I O N S */
786/************************************************************************/
787#ifdef MCSSerialProbe
788static int mos7840_serial_probe(struct usb_serial *serial,
789 const struct usb_device_id *id)
790{
791
792 /*need to implement the mode_reg reading and updating\
793 structures usb_serial_ device_type\
794 (i.e num_ports, num_bulkin,bulkout etc) */
795 /* Also we can update the changes attach */
796 return 1;
797}
798#endif
799
800/*****************************************************************************
801 * mos7840_open
802 * this function is called by the tty driver when a port is opened
803 * If successful, we return 0
804 * Otherwise we return a negative error number.
805 *****************************************************************************/
806
95da310e
AC		 807static int mos7840_open(struct tty_struct *tty,
808 struct usb_serial_port *port, struct file *filp)
3f542974
PS		 809{
810 int response;
811 int j;
812 struct usb_serial *serial;
813 struct urb *urb;
814 __u16 Data;
815 int status;
816 struct moschip_port *mos7840_port;
0de9a702 817 struct moschip_port *port0;
3f542974 818
441b62c1 819 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 820 dbg("%s", "Port Paranoia failed \n");
821 return -ENODEV;
822 }
823
3f542974
PS		 824 serial = port->serial;
825
441b62c1 826 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 827 dbg("%s", "Serial Paranoia failed \n");
828 return -ENODEV;
829 }
830
831 mos7840_port = mos7840_get_port_private(port);
0de9a702 832 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 833
0de9a702 834 if (mos7840_port == NULL || port0 == NULL)
3f542974
PS		 835 return -ENODEV;
836
837 usb_clear_halt(serial->dev, port->write_urb->pipe);
838 usb_clear_halt(serial->dev, port->read_urb->pipe);
0de9a702 839 port0->open_ports++;
3f542974
PS		 840
841 /* Initialising the write urb pool */
842 for (j = 0; j < NUM_URBS; ++j) {
0de9a702 843 urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974
PS		 844 mos7840_port->write_urb_pool[j] = urb;
845
846 if (urb == NULL) {
194343d9 847 dev_err(&port->dev, "No more urbs???\n");
3f542974
PS		 848 continue;
849 }
850
880af9db
AC		 851 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
852 GFP_KERNEL);
3f542974 853 if (!urb->transfer_buffer) {
0de9a702
ON		 854 usb_free_urb(urb);
855 mos7840_port->write_urb_pool[j] = NULL;
194343d9
GKH		 856 dev_err(&port->dev,
857 "%s-out of memory for urb buffers.\n",
858 __func__);
3f542974
PS		 859 continue;
860 }
861 }
862
863/*****************************************************************************
864 * Initialize MCS7840 -- Write Init values to corresponding Registers
865 *
866 * Register Index
867 * 1 : IER
868 * 2 : FCR
869 * 3 : LCR
870 * 4 : MCR
871 *
872 * 0x08 : SP1/2 Control Reg
873 *****************************************************************************/
874
880af9db 875 /* NEED to check the following Block */
3f542974 876
3f542974
PS		 877 Data = 0x0;
878 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
879 if (status < 0) {
880 dbg("Reading Spreg failed\n");
881 return -1;
882 }
883 Data |= 0x80;
884 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
885 if (status < 0) {
886 dbg("writing Spreg failed\n");
887 return -1;
888 }
889
890 Data &= ~0x80;
891 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
892 if (status < 0) {
893 dbg("writing Spreg failed\n");
894 return -1;
895 }
880af9db 896 /* End of block to be checked */
3f542974 897
3f542974 898 Data = 0x0;
880af9db
AC		 899 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
900 &Data);
3f542974
PS		 901 if (status < 0) {
902 dbg("Reading Controlreg failed\n");
903 return -1;
904 }
880af9db
AC		 905 Data |= 0x08; /* Driver done bit */
906 Data |= 0x20; /* rx_disable */
907 status = mos7840_set_reg_sync(port,
908 mos7840_port->ControlRegOffset, Data);
3f542974
PS		 909 if (status < 0) {
910 dbg("writing Controlreg failed\n");
911 return -1;
912 }
880af9db
AC		 913 /* do register settings here */
914 /* Set all regs to the device default values. */
915 /***********************************
916 * First Disable all interrupts.
917 ***********************************/
3f542974 918 Data = 0x00;
3f542974
PS		 919 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
920 if (status < 0) {
921 dbg("disableing interrupts failed\n");
922 return -1;
923 }
880af9db 924 /* Set FIFO_CONTROL_REGISTER to the default value */
3f542974 925 Data = 0x00;
3f542974
PS		 926 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
927 if (status < 0) {
928 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
929 return -1;
930 }
931
932 Data = 0xcf;
3f542974
PS		 933 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
934 if (status < 0) {
935 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
936 return -1;
937 }
938
939 Data = 0x03;
3f542974
PS		 940 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
941 mos7840_port->shadowLCR = Data;
942
943 Data = 0x0b;
3f542974
PS		 944 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
945 mos7840_port->shadowMCR = Data;
946
947 Data = 0x00;
3f542974
PS		 948 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
949 mos7840_port->shadowLCR = Data;
950
880af9db 951 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 952 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
953
954 Data = 0x0c;
3f542974
PS		 955 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
956
957 Data = 0x0;
3f542974
PS		 958 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
959
960 Data = 0x00;
3f542974
PS		 961 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
962
963 Data = Data & ~SERIAL_LCR_DLAB;
3f542974
PS		 964 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
965 mos7840_port->shadowLCR = Data;
966
880af9db 967 /* clearing Bulkin and Bulkout Fifo */
3f542974 968 Data = 0x0;
3f542974
PS		 969 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
970
971 Data = Data | 0x0c;
3f542974
PS		 972 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
973
974 Data = Data & ~0x0c;
3f542974 975 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
880af9db 976 /* Finally enable all interrupts */
3f542974 977 Data = 0x0c;
3f542974
PS		 978 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
979
880af9db 980 /* clearing rx_disable */
3f542974 981 Data = 0x0;
880af9db
AC		 982 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
983 &Data);
3f542974 984 Data = Data & ~0x20;
880af9db
AC		 985 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
986 Data);
3f542974 987
880af9db 988 /* rx_negate */
3f542974 989 Data = 0x0;
880af9db
AC		 990 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
991 &Data);
3f542974 992 Data = Data | 0x10;
880af9db
AC		 993 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
994 Data);
3f542974
PS		 995
996 /* force low_latency on so that our tty_push actually forces *
997 * the data through,otherwise it is scheduled, and with *
998 * high data rates (like with OHCI) data can get lost. */
95da310e
AC		 999 if (tty)
1000 tty->low_latency = 1;
880af9db
AC		 1001
1002 /* Check to see if we've set up our endpoint info yet *
1003 * (can't set it up in mos7840_startup as the structures *
1004 * were not set up at that time.) */
0de9a702 1005 if (port0->open_ports == 1) {
3f542974 1006 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1007 /* set up interrupt urb */
3f542974 1008 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1009 serial->dev,
1010 usb_rcvintpipe(serial->dev,
1011 serial->port[0]->interrupt_in_endpointAddress),
1012 serial->port[0]->interrupt_in_buffer,
1013 serial->port[0]->interrupt_in_urb->
1014 transfer_buffer_length,
1015 mos7840_interrupt_callback,
1016 serial,
1017 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1018
1019 /* start interrupt read for mos7840 *
1020 * will continue as long as mos7840 is connected */
1021
1022 response =
1023 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1024 GFP_KERNEL);
1025 if (response) {
194343d9
GKH		 1026 dev_err(&port->dev, "%s - Error %d submitting "
1027 "interrupt urb\n", __func__, response);
3f542974
PS		 1028 }
1029
1030 }
1031
1032 }
1033
1034 /* see if we've set up our endpoint info yet *
1035 * (can't set it up in mos7840_startup as the *
1036 * structures were not set up at that time.) */
1037
1038 dbg("port number is %d \n", port->number);
1039 dbg("serial number is %d \n", port->serial->minor);
1040 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress);
1041 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress);
1042 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress);
1043 dbg("port's number in the device is %d\n", mos7840_port->port_num);
1044 mos7840_port->read_urb = port->read_urb;
1045
1046 /* set up our bulk in urb */
1047
1048 usb_fill_bulk_urb(mos7840_port->read_urb,
1049 serial->dev,
1050 usb_rcvbulkpipe(serial->dev,
1051 port->bulk_in_endpointAddress),
1052 port->bulk_in_buffer,
1053 mos7840_port->read_urb->transfer_buffer_length,
1054 mos7840_bulk_in_callback, mos7840_port);
1055
1056 dbg("mos7840_open: bulkin endpoint is %d\n",
1057 port->bulk_in_endpointAddress);
1058 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1059 if (response) {
194343d9
GKH		 1060 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1061 __func__, response);
3f542974
PS		 1062 }
1063
1064 /* initialize our wait queues */
1065 init_waitqueue_head(&mos7840_port->wait_chase);
1066 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1067
1068 /* initialize our icount structure */
1069 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1070
1071 /* initialize our port settings */
880af9db
AC		 1072 /* Must set to enable ints! */
1073 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1074 /* send a open port command */
1075 mos7840_port->open = 1;
880af9db 1076 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974
PS		 1077 mos7840_port->icount.tx = 0;
1078 mos7840_port->icount.rx = 0;
1079
880af9db
AC		 1080 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n",
1081 serial, mos7840_port, port);
3f542974
PS		 1082
1083 return 0;
1084
1085}
1086
1087/*****************************************************************************
1088 * mos7840_chars_in_buffer
1089 * this function is called by the tty driver when it wants to know how many
1090 * bytes of data we currently have outstanding in the port (data that has
1091 * been written, but hasn't made it out the port yet)
1092 * If successful, we return the number of bytes left to be written in the
1093 * system,
95da310e 1094 * Otherwise we return zero.
3f542974
PS		 1095 *****************************************************************************/
1096
95da310e 1097static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1098{
95da310e 1099 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1100 int i;
1101 int chars = 0;
0de9a702 1102 unsigned long flags;
3f542974
PS		 1103 struct moschip_port *mos7840_port;
1104
1105 dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
1106
441b62c1 1107 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974 1108 dbg("%s", "Invalid port \n");
95da310e 1109 return 0;
3f542974
PS		 1110 }
1111
1112 mos7840_port = mos7840_get_port_private(port);
1113 if (mos7840_port == NULL) {
1114 dbg("%s \n", "mos7840_break:leaving ...........");
95da310e 1115 return 0;
3f542974
PS		 1116 }
1117
880af9db 1118 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
95da310e
AC		 1119 for (i = 0; i < NUM_URBS; ++i)
1120 if (mos7840_port->busy[i])
3f542974 1121 chars += URB_TRANSFER_BUFFER_SIZE;
880af9db 1122 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
441b62c1 1123 dbg("%s - returns %d", __func__, chars);
0de9a702 1124 return chars;
3f542974
PS		 1125
1126}
1127
1128/************************************************************************
1129 *
1130 * mos7840_block_until_tx_empty
1131 *
1132 * This function will block the close until one of the following:
1133 * 1. TX count are 0
1134 * 2. The mos7840 has stopped
dc0d5c1e 1135 * 3. A timeout of 3 seconds without activity has expired
3f542974
PS		 1136 *
1137 ************************************************************************/
95da310e
AC		 1138static void mos7840_block_until_tx_empty(struct tty_struct *tty,
1139 struct moschip_port *mos7840_port)
3f542974
PS		 1140{
1141 int timeout = HZ / 10;
1142 int wait = 30;
1143 int count;
1144
1145 while (1) {
1146
95da310e 1147 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1148
1149 /* Check for Buffer status */
880af9db 1150 if (count <= 0)
3f542974 1151 return;
3f542974
PS		 1152
1153 /* Block the thread for a while */
1154 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1155 timeout);
1156
1157 /* No activity.. count down section */
1158 wait--;
1159 if (wait == 0) {
441b62c1 1160 dbg("%s - TIMEOUT", __func__);
3f542974
PS		 1161 return;
1162 } else {
dc0d5c1e 1163 /* Reset timeout value back to seconds */
3f542974
PS		 1164 wait = 30;
1165 }
1166 }
1167}
1168
1169/*****************************************************************************
1170 * mos7840_close
1171 * this function is called by the tty driver when a port is closed
1172 *****************************************************************************/
1173
95da310e
AC		 1174static void mos7840_close(struct tty_struct *tty,
1175 struct usb_serial_port *port, struct file *filp)
3f542974
PS		 1176{
1177 struct usb_serial *serial;
1178 struct moschip_port *mos7840_port;
0de9a702 1179 struct moschip_port *port0;
3f542974
PS		 1180 int j;
1181 __u16 Data;
1182
1183 dbg("%s\n", "mos7840_close:entering...");
1184
441b62c1 1185 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1186 dbg("%s", "Port Paranoia failed \n");
1187 return;
1188 }
1189
441b62c1 1190 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 1191 if (!serial) {
1192 dbg("%s", "Serial Paranoia failed \n");
1193 return;
1194 }
1195
1196 mos7840_port = mos7840_get_port_private(port);
0de9a702 1197 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1198
0de9a702 1199 if (mos7840_port == NULL || port0 == NULL)
3f542974 1200 return;
3f542974
PS		 1201
1202 for (j = 0; j < NUM_URBS; ++j)
1203 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1204
1205 /* Freeing Write URBs */
1206 for (j = 0; j < NUM_URBS; ++j) {
1207 if (mos7840_port->write_urb_pool[j]) {
1208 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1209 kfree(mos7840_port->write_urb_pool[j]->
1210 transfer_buffer);
1211
1212 usb_free_urb(mos7840_port->write_urb_pool[j]);
1213 }
1214 }
1215
95da310e 1216 if (serial->dev)
3f542974 1217 /* flush and block until tx is empty */
95da310e 1218 mos7840_block_until_tx_empty(tty, mos7840_port);
3f542974
PS		 1219
1220 /* While closing port, shutdown all bulk read, write *
1221 * and interrupt read if they exists */
1222 if (serial->dev) {
3f542974
PS		 1223 if (mos7840_port->write_urb) {
1224 dbg("%s", "Shutdown bulk write\n");
1225 usb_kill_urb(mos7840_port->write_urb);
1226 }
3f542974
PS		 1227 if (mos7840_port->read_urb) {
1228 dbg("%s", "Shutdown bulk read\n");
1229 usb_kill_urb(mos7840_port->read_urb);
1230 }
1231 if ((&mos7840_port->control_urb)) {
1232 dbg("%s", "Shutdown control read\n");
880af9db 1233 /*/ usb_kill_urb (mos7840_port->control_urb); */
3f542974
PS		 1234 }
1235 }
880af9db
AC		 1236/* if(mos7840_port->ctrl_buf != NULL) */
1237/* kfree(mos7840_port->ctrl_buf); */
0de9a702 1238 port0->open_ports--;
3f542974 1239 dbg("mos7840_num_open_ports in close%d:in port%d\n",
0de9a702
ON		 1240 port0->open_ports, port->number);
1241 if (port0->open_ports == 0) {
3f542974
PS		 1242 if (serial->port[0]->interrupt_in_urb) {
1243 dbg("%s", "Shutdown interrupt_in_urb\n");
0de9a702 1244 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1245 }
1246 }
1247
1248 if (mos7840_port->write_urb) {
1249 /* if this urb had a transfer buffer already (old tx) free it */
880af9db 1250 if (mos7840_port->write_urb->transfer_buffer != NULL)
3f542974 1251 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1252 usb_free_urb(mos7840_port->write_urb);
1253 }
1254
1255 Data = 0x0;
1256 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1257
1258 Data = 0x00;
1259 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1260
1261 mos7840_port->open = 0;
1262
1263 dbg("%s \n", "Leaving ............");
1264}
1265
1266/************************************************************************
1267 *
1268 * mos7840_block_until_chase_response
1269 *
1270 * This function will block the close until one of the following:
1271 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1272 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1273 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1274 *
1275 ************************************************************************/
1276
95da310e
AC		 1277static void mos7840_block_until_chase_response(struct tty_struct *tty,
1278 struct moschip_port *mos7840_port)
3f542974
PS		 1279{
1280 int timeout = 1 * HZ;
1281 int wait = 10;
1282 int count;
1283
1284 while (1) {
95da310e 1285 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1286
1287 /* Check for Buffer status */
880af9db 1288 if (count <= 0)
3f542974 1289 return;
3f542974
PS		 1290
1291 /* Block the thread for a while */
1292 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1293 timeout);
1294 /* No activity.. count down section */
1295 wait--;
1296 if (wait == 0) {
441b62c1 1297 dbg("%s - TIMEOUT", __func__);
3f542974
PS		 1298 return;
1299 } else {
dc0d5c1e 1300 /* Reset timeout value back to seconds */
3f542974
PS		 1301 wait = 10;
1302 }
1303 }
1304
1305}
1306
1307/*****************************************************************************
1308 * mos7840_break
1309 * this function sends a break to the port
1310 *****************************************************************************/
95da310e 1311static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1312{
95da310e 1313 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1314 unsigned char data;
1315 struct usb_serial *serial;
1316 struct moschip_port *mos7840_port;
1317
1318 dbg("%s \n", "Entering ...........");
1319 dbg("mos7840_break: Start\n");
1320
441b62c1 1321 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1322 dbg("%s", "Port Paranoia failed \n");
1323 return;
1324 }
1325
441b62c1 1326 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 1327 if (!serial) {
1328 dbg("%s", "Serial Paranoia failed \n");
1329 return;
1330 }
1331
1332 mos7840_port = mos7840_get_port_private(port);
1333
880af9db 1334 if (mos7840_port == NULL)
3f542974 1335 return;
3f542974 1336
95da310e 1337 if (serial->dev)
3f542974 1338 /* flush and block until tx is empty */
95da310e 1339 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1340
95da310e 1341 if (break_state == -1)
3f542974 1342 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1343 else
3f542974 1344 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974 1345
6b447f04 1346 /* FIXME: no locking on shadowLCR anywhere in driver */
3f542974
PS		 1347 mos7840_port->shadowLCR = data;
1348 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
1349 mos7840_port->shadowLCR);
1350 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1351 mos7840_port->shadowLCR);
1352
1353 return;
1354}
1355
1356/*****************************************************************************
1357 * mos7840_write_room
1358 * this function is called by the tty driver when it wants to know how many
1359 * bytes of data we can accept for a specific port.
1360 * If successful, we return the amount of room that we have for this port
1361 * Otherwise we return a negative error number.
1362 *****************************************************************************/
1363
95da310e 1364static int mos7840_write_room(struct tty_struct *tty)
3f542974 1365{
95da310e 1366 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1367 int i;
1368 int room = 0;
0de9a702 1369 unsigned long flags;
3f542974
PS		 1370 struct moschip_port *mos7840_port;
1371
1372 dbg("%s \n", " mos7840_write_room:entering ...........");
1373
441b62c1 1374 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1375 dbg("%s", "Invalid port \n");
1376 dbg("%s \n", " mos7840_write_room:leaving ...........");
1377 return -1;
1378 }
1379
1380 mos7840_port = mos7840_get_port_private(port);
1381 if (mos7840_port == NULL) {
1382 dbg("%s \n", "mos7840_break:leaving ...........");
1383 return -1;
1384 }
1385
0de9a702 1386 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1387 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1388 if (!mos7840_port->busy[i])
3f542974 1389 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1390 }
0de9a702 1391 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1392
0de9a702 1393 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
441b62c1 1394 dbg("%s - returns %d", __func__, room);
0de9a702 1395 return room;
3f542974
PS		 1396
1397}
1398
1399/*****************************************************************************
1400 * mos7840_write
1401 * this function is called by the tty driver when data should be written to
1402 * the port.
1403 * If successful, we return the number of bytes written, otherwise we
1404 * return a negative error number.
1405 *****************************************************************************/
1406
95da310e 1407static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1408 const unsigned char *data, int count)
1409{
1410 int status;
1411 int i;
1412 int bytes_sent = 0;
1413 int transfer_size;
0de9a702 1414 unsigned long flags;
3f542974
PS		 1415
1416 struct moschip_port *mos7840_port;
1417 struct usb_serial *serial;
1418 struct urb *urb;
880af9db 1419 /* __u16 Data; */
3f542974
PS		 1420 const unsigned char *current_position = data;
1421 unsigned char *data1;
1422 dbg("%s \n", "entering ...........");
880af9db
AC		 1423 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1424 mos7840_port->shadowLCR); */
3f542974
PS		 1425
1426#ifdef NOTMOS7840
1427 Data = 0x00;
3f542974
PS		 1428 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1429 mos7840_port->shadowLCR = Data;
1430 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
1431 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1432 mos7840_port->shadowLCR);
1433
880af9db
AC		 1434 /* Data = 0x03; */
1435 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1436 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1437
880af9db 1438 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1439 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1440
880af9db
AC		 1441 /* Data = 0x0c; */
1442 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1443 Data = 0x00;
3f542974
PS		 1444 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1445 dbg("mos7840_write:DLL value is %x\n", Data);
1446
1447 Data = 0x0;
3f542974
PS		 1448 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1449 dbg("mos7840_write:DLM value is %x\n", Data);
1450
1451 Data = Data & ~SERIAL_LCR_DLAB;
1452 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1453 mos7840_port->shadowLCR);
3f542974
PS		 1454 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1455#endif
1456
441b62c1 1457 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1458 dbg("%s", "Port Paranoia failed \n");
1459 return -1;
1460 }
1461
1462 serial = port->serial;
441b62c1 1463 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 1464 dbg("%s", "Serial Paranoia failed \n");
1465 return -1;
1466 }
1467
1468 mos7840_port = mos7840_get_port_private(port);
1469 if (mos7840_port == NULL) {
1470 dbg("%s", "mos7840_port is NULL\n");
1471 return -1;
1472 }
1473
1474 /* try to find a free urb in the list */
1475 urb = NULL;
1476
0de9a702 1477 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1478 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1479 if (!mos7840_port->busy[i]) {
1480 mos7840_port->busy[i] = 1;
3f542974
PS		 1481 urb = mos7840_port->write_urb_pool[i];
1482 dbg("\nURB:%d", i);
1483 break;
1484 }
1485 }
0de9a702 1486 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1487
1488 if (urb == NULL) {
441b62c1 1489 dbg("%s - no more free urbs", __func__);
3f542974
PS		 1490 goto exit;
1491 }
1492
1493 if (urb->transfer_buffer == NULL) {
1494 urb->transfer_buffer =
1495 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1496
1497 if (urb->transfer_buffer == NULL) {
194343d9
GKH		 1498 dev_err(&port->dev, "%s no more kernel memory...\n",
1499 __func__);
3f542974
PS		 1500 goto exit;
1501 }
1502 }
1503 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1504
97c4965d 1505 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1506
1507 /* fill urb with data and submit */
1508 usb_fill_bulk_urb(urb,
1509 serial->dev,
1510 usb_sndbulkpipe(serial->dev,
1511 port->bulk_out_endpointAddress),
1512 urb->transfer_buffer,
1513 transfer_size,
1514 mos7840_bulk_out_data_callback, mos7840_port);
1515
1516 data1 = urb->transfer_buffer;
1517 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress);
1518
1519 /* send it down the pipe */
1520 status = usb_submit_urb(urb, GFP_ATOMIC);
1521
1522 if (status) {
0de9a702 1523 mos7840_port->busy[i] = 0;
194343d9
GKH		 1524 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1525 "with status = %d\n", __func__, status);
3f542974
PS		 1526 bytes_sent = status;
1527 goto exit;
1528 }
1529 bytes_sent = transfer_size;
1530 mos7840_port->icount.tx += transfer_size;
0de9a702 1531 smp_wmb();
3f542974 1532 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
95da310e 1533exit:
3f542974
PS		 1534 return bytes_sent;
1535
1536}
1537
1538/*****************************************************************************
1539 * mos7840_throttle
1540 * this function is called by the tty driver when it wants to stop the data
1541 * being read from the port.
1542 *****************************************************************************/
1543
95da310e 1544static void mos7840_throttle(struct tty_struct *tty)
3f542974 1545{
95da310e 1546 struct usb_serial_port *port = tty->driver_data;
3f542974 1547 struct moschip_port *mos7840_port;
3f542974
PS		 1548 int status;
1549
441b62c1 1550 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1551 dbg("%s", "Invalid port \n");
1552 return;
1553 }
1554
1555 dbg("- port %d\n", port->number);
1556
1557 mos7840_port = mos7840_get_port_private(port);
1558
1559 if (mos7840_port == NULL)
1560 return;
1561
1562 if (!mos7840_port->open) {
1563 dbg("%s\n", "port not opened");
1564 return;
1565 }
1566
1567 dbg("%s", "Entering .......... \n");
1568
3f542974
PS		 1569 /* if we are implementing XON/XOFF, send the stop character */
1570 if (I_IXOFF(tty)) {
1571 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1572 status = mos7840_write(tty, port, &stop_char, 1);
1573 if (status <= 0)
3f542974 1574 return;
3f542974 1575 }
3f542974
PS		 1576 /* if we are implementing RTS/CTS, toggle that line */
1577 if (tty->termios->c_cflag & CRTSCTS) {
1578 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1579 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1580 mos7840_port->shadowMCR);
95da310e 1581 if (status < 0)
3f542974 1582 return;
3f542974
PS		 1583 }
1584
1585 return;
1586}
1587
1588/*****************************************************************************
1589 * mos7840_unthrottle
880af9db
AC		 1590 * this function is called by the tty driver when it wants to resume
1591 * the data being read from the port (called after mos7840_throttle is
1592 * called)
3f542974 1593 *****************************************************************************/
95da310e 1594static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1595{
95da310e 1596 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1597 int status;
1598 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1599
441b62c1 1600 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1601 dbg("%s", "Invalid port \n");
1602 return;
1603 }
1604
1605 if (mos7840_port == NULL)
1606 return;
1607
1608 if (!mos7840_port->open) {
441b62c1 1609 dbg("%s - port not opened", __func__);
3f542974
PS		 1610 return;
1611 }
1612
1613 dbg("%s", "Entering .......... \n");
1614
3f542974
PS		 1615 /* if we are implementing XON/XOFF, send the start character */
1616 if (I_IXOFF(tty)) {
1617 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1618 status = mos7840_write(tty, port, &start_char, 1);
1619 if (status <= 0)
3f542974 1620 return;
3f542974
PS		 1621 }
1622
1623 /* if we are implementing RTS/CTS, toggle that line */
1624 if (tty->termios->c_cflag & CRTSCTS) {
1625 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1626 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1627 mos7840_port->shadowMCR);
95da310e 1628 if (status < 0)
3f542974 1629 return;
3f542974 1630 }
3f542974
PS		 1631}
1632
95da310e 1633static int mos7840_tiocmget(struct tty_struct *tty, struct file *file)
3f542974 1634{
95da310e 1635 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1636 struct moschip_port *mos7840_port;
1637 unsigned int result;
1638 __u16 msr;
1639 __u16 mcr;
880af9db 1640 int status;
3f542974
PS		 1641 mos7840_port = mos7840_get_port_private(port);
1642
441b62c1 1643 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1644
1645 if (mos7840_port == NULL)
1646 return -ENODEV;
1647
1648 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1649 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1650 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1651 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1652 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1653 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1654 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1655 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1656 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1657
441b62c1 1658 dbg("%s - 0x%04X", __func__, result);
3f542974
PS		 1659
1660 return result;
1661}
1662
95da310e 1663static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
3f542974
PS		 1664 unsigned int set, unsigned int clear)
1665{
95da310e 1666 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1667 struct moschip_port *mos7840_port;
1668 unsigned int mcr;
87521c46 1669 int status;
3f542974 1670
441b62c1 1671 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1672
1673 mos7840_port = mos7840_get_port_private(port);
1674
1675 if (mos7840_port == NULL)
1676 return -ENODEV;
1677
e2984494 1678 /* FIXME: What locks the port registers ? */
3f542974
PS		 1679 mcr = mos7840_port->shadowMCR;
1680 if (clear & TIOCM_RTS)
1681 mcr &= ~MCR_RTS;
1682 if (clear & TIOCM_DTR)
1683 mcr &= ~MCR_DTR;
1684 if (clear & TIOCM_LOOP)
1685 mcr &= ~MCR_LOOPBACK;
1686
1687 if (set & TIOCM_RTS)
1688 mcr |= MCR_RTS;
1689 if (set & TIOCM_DTR)
1690 mcr |= MCR_DTR;
1691 if (set & TIOCM_LOOP)
1692 mcr |= MCR_LOOPBACK;
1693
1694 mos7840_port->shadowMCR = mcr;
1695
3f542974
PS		 1696 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1697 if (status < 0) {
1698 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
87521c46 1699 return status;
3f542974
PS		 1700 }
1701
1702 return 0;
1703}
1704
1705/*****************************************************************************
1706 * mos7840_calc_baud_rate_divisor
1707 * this function calculates the proper baud rate divisor for the specified
1708 * baud rate.
1709 *****************************************************************************/
1710static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
880af9db 1711 __u16 *clk_sel_val)
3f542974
PS		 1712{
1713
441b62c1 1714 dbg("%s - %d", __func__, baudRate);
3f542974
PS		 1715
1716 if (baudRate <= 115200) {
1717 *divisor = 115200 / baudRate;
1718 *clk_sel_val = 0x0;
1719 }
1720 if ((baudRate > 115200) && (baudRate <= 230400)) {
1721 *divisor = 230400 / baudRate;
1722 *clk_sel_val = 0x10;
1723 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1724 *divisor = 403200 / baudRate;
1725 *clk_sel_val = 0x20;
1726 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1727 *divisor = 460800 / baudRate;
1728 *clk_sel_val = 0x30;
1729 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1730 *divisor = 806400 / baudRate;
1731 *clk_sel_val = 0x40;
1732 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1733 *divisor = 921600 / baudRate;
1734 *clk_sel_val = 0x50;
1735 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1736 *divisor = 1572864 / baudRate;
1737 *clk_sel_val = 0x60;
1738 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1739 *divisor = 3145728 / baudRate;
1740 *clk_sel_val = 0x70;
1741 }
1742 return 0;
1743
1744#ifdef NOTMCS7840
1745
1746 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1747 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1748 *divisor = mos7840_divisor_table[i].Divisor;
1749 return 0;
1750 }
1751 }
1752
1753 /* After trying for all the standard baud rates *
1754 * Try calculating the divisor for this baud rate */
1755
1756 if (baudrate > 75 && baudrate < 230400) {
1757 /* get the divisor */
1758 custom = (__u16) (230400L / baudrate);
1759
1760 /* Check for round off */
1761 round1 = (__u16) (2304000L / baudrate);
1762 round = (__u16) (round1 - (custom * 10));
880af9db 1763 if (round > 4)
3f542974 1764 custom++;
3f542974
PS		 1765 *divisor = custom;
1766
1767 dbg(" Baud %d = %d\n", baudrate, custom);
1768 return 0;
1769 }
1770
1771 dbg("%s\n", " Baud calculation Failed...");
1772 return -1;
1773#endif
1774}
1775
1776/*****************************************************************************
1777 * mos7840_send_cmd_write_baud_rate
1778 * this function sends the proper command to change the baud rate of the
1779 * specified port.
1780 *****************************************************************************/
1781
1782static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1783 int baudRate)
1784{
1785 int divisor = 0;
1786 int status;
1787 __u16 Data;
1788 unsigned char number;
1789 __u16 clk_sel_val;
1790 struct usb_serial_port *port;
1791
1792 if (mos7840_port == NULL)
1793 return -1;
1794
1795 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 1796 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1797 dbg("%s", "Invalid port \n");
1798 return -1;
1799 }
1800
441b62c1 1801 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
3f542974
PS		 1802 dbg("%s", "Invalid Serial \n");
1803 return -1;
1804 }
1805
1806 dbg("%s", "Entering .......... \n");
1807
1808 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1809
441b62c1 1810 dbg("%s - port = %d, baud = %d", __func__,
3f542974 1811 mos7840_port->port->number, baudRate);
880af9db 1812 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1813 if (baudRate > 115200) {
1814#ifdef HW_flow_control
880af9db
AC		 1815 /* NOTE: need to see the pther register to modify */
1816 /* setting h/w flow control bit to 1 */
3f542974
PS		 1817 Data = 0x2b;
1818 mos7840_port->shadowMCR = Data;
880af9db
AC		 1819 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1820 Data);
3f542974
PS		 1821 if (status < 0) {
1822 dbg("Writing spreg failed in set_serial_baud\n");
1823 return -1;
1824 }
1825#endif
1826
1827 } else {
1828#ifdef HW_flow_control
880af9db 1829 / *setting h/w flow control bit to 0 */
3f542974
PS		 1830 Data = 0xb;
1831 mos7840_port->shadowMCR = Data;
880af9db
AC		 1832 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1833 Data);
3f542974
PS		 1834 if (status < 0) {
1835 dbg("Writing spreg failed in set_serial_baud\n");
1836 return -1;
1837 }
1838#endif
1839
1840 }
1841
880af9db 1842 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1843 clk_sel_val = 0x0;
1844 Data = 0x0;
880af9db 1845 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
3f542974 1846 &clk_sel_val);
880af9db
AC		 1847 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1848 &Data);
3f542974
PS		 1849 if (status < 0) {
1850 dbg("reading spreg failed in set_serial_baud\n");
1851 return -1;
1852 }
1853 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1854 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1855 Data);
3f542974
PS		 1856 if (status < 0) {
1857 dbg("Writing spreg failed in set_serial_baud\n");
1858 return -1;
1859 }
1860 /* Calculate the Divisor */
1861
1862 if (status) {
194343d9 1863 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1864 return status;
1865 }
1866 /* Enable access to divisor latch */
1867 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1868 mos7840_port->shadowLCR = Data;
1869 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1870
1871 /* Write the divisor */
1872 Data = (unsigned char)(divisor & 0xff);
1873 dbg("set_serial_baud Value to write DLL is %x\n", Data);
1874 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1875
1876 Data = (unsigned char)((divisor & 0xff00) >> 8);
1877 dbg("set_serial_baud Value to write DLM is %x\n", Data);
1878 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1879
1880 /* Disable access to divisor latch */
1881 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1882 mos7840_port->shadowLCR = Data;
1883 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1884
1885 }
3f542974
PS		 1886 return status;
1887}
1888
1889/*****************************************************************************
1890 * mos7840_change_port_settings
1891 * This routine is called to set the UART on the device to match
1892 * the specified new settings.
1893 *****************************************************************************/
1894
95da310e
AC		 1895static void mos7840_change_port_settings(struct tty_struct *tty,
1896 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1897{
3f542974
PS		 1898 int baud;
1899 unsigned cflag;
1900 unsigned iflag;
1901 __u8 lData;
1902 __u8 lParity;
1903 __u8 lStop;
1904 int status;
1905 __u16 Data;
1906 struct usb_serial_port *port;
1907 struct usb_serial *serial;
1908
1909 if (mos7840_port == NULL)
1910 return;
1911
1912 port = (struct usb_serial_port *)mos7840_port->port;
1913
441b62c1 1914 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1915 dbg("%s", "Invalid port \n");
1916 return;
1917 }
1918
441b62c1 1919 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
3f542974
PS		 1920 dbg("%s", "Invalid Serial \n");
1921 return;
1922 }
1923
1924 serial = port->serial;
1925
441b62c1 1926 dbg("%s - port %d", __func__, mos7840_port->port->number);
3f542974
PS		 1927
1928 if (!mos7840_port->open) {
441b62c1 1929 dbg("%s - port not opened", __func__);
3f542974
PS		 1930 return;
1931 }
1932
3f542974
PS		 1933 dbg("%s", "Entering .......... \n");
1934
1935 lData = LCR_BITS_8;
1936 lStop = LCR_STOP_1;
1937 lParity = LCR_PAR_NONE;
1938
1939 cflag = tty->termios->c_cflag;
1940 iflag = tty->termios->c_iflag;
1941
1942 /* Change the number of bits */
1943 if (cflag & CSIZE) {
1944 switch (cflag & CSIZE) {
1945 case CS5:
1946 lData = LCR_BITS_5;
1947 break;
1948
1949 case CS6:
1950 lData = LCR_BITS_6;
1951 break;
1952
1953 case CS7:
1954 lData = LCR_BITS_7;
1955 break;
1956 default:
1957 case CS8:
1958 lData = LCR_BITS_8;
1959 break;
1960 }
1961 }
1962 /* Change the Parity bit */
1963 if (cflag & PARENB) {
1964 if (cflag & PARODD) {
1965 lParity = LCR_PAR_ODD;
441b62c1 1966 dbg("%s - parity = odd", __func__);
3f542974
PS		 1967 } else {
1968 lParity = LCR_PAR_EVEN;
441b62c1 1969 dbg("%s - parity = even", __func__);
3f542974
PS		 1970 }
1971
1972 } else {
441b62c1 1973 dbg("%s - parity = none", __func__);
3f542974
PS		 1974 }
1975
880af9db 1976 if (cflag & CMSPAR)
3f542974 1977 lParity = lParity | 0x20;
3f542974
PS		 1978
1979 /* Change the Stop bit */
1980 if (cflag & CSTOPB) {
1981 lStop = LCR_STOP_2;
441b62c1 1982 dbg("%s - stop bits = 2", __func__);
3f542974
PS		 1983 } else {
1984 lStop = LCR_STOP_1;
441b62c1 1985 dbg("%s - stop bits = 1", __func__);
3f542974
PS		 1986 }
1987
1988 /* Update the LCR with the correct value */
1989 mos7840_port->shadowLCR &=
1990 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1991 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1992
1993 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
1994 mos7840_port->shadowLCR);
1995 /* Disable Interrupts */
1996 Data = 0x00;
1997 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1998
1999 Data = 0x00;
2000 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2001
2002 Data = 0xcf;
2003 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2004
2005 /* Send the updated LCR value to the mos7840 */
2006 Data = mos7840_port->shadowLCR;
2007
2008 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2009
2010 Data = 0x00b;
2011 mos7840_port->shadowMCR = Data;
2012 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2013 Data = 0x00b;
2014 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2015
2016 /* set up the MCR register and send it to the mos7840 */
2017
2018 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 2019 if (cflag & CBAUD)
3f542974 2020 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 2021
880af9db 2022 if (cflag & CRTSCTS)
3f542974 2023 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 2024 else
3f542974 2025 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 2026
2027 Data = mos7840_port->shadowMCR;
2028 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2029
2030 /* Determine divisor based on baud rate */
2031 baud = tty_get_baud_rate(tty);
2032
2033 if (!baud) {
2034 /* pick a default, any default... */
2035 dbg("%s\n", "Picked default baud...");
2036 baud = 9600;
2037 }
2038
441b62c1 2039 dbg("%s - baud rate = %d", __func__, baud);
3f542974
PS		 2040 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2041
2042 /* Enable Interrupts */
2043 Data = 0x0c;
2044 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2045
2046 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2047 mos7840_port->read_urb->dev = serial->dev;
2048
2049 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2050
2051 if (status) {
2052 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2053 status);
2054 }
2055 }
2056 wake_up(&mos7840_port->delta_msr_wait);
2057 mos7840_port->delta_msr_cond = 1;
2058 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
2059 mos7840_port->shadowLCR);
2060
2061 return;
2062}
2063
2064/*****************************************************************************
2065 * mos7840_set_termios
2066 * this function is called by the tty driver when it wants to change
2067 * the termios structure
2068 *****************************************************************************/
2069
95da310e
AC		 2070static void mos7840_set_termios(struct tty_struct *tty,
2071 struct usb_serial_port *port,
606d099c 2072 struct ktermios *old_termios)
3f542974
PS		 2073{
2074 int status;
2075 unsigned int cflag;
2076 struct usb_serial *serial;
2077 struct moschip_port *mos7840_port;
3f542974 2078 dbg("mos7840_set_termios: START\n");
441b62c1 2079 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2080 dbg("%s", "Invalid port \n");
2081 return;
2082 }
2083
2084 serial = port->serial;
2085
441b62c1 2086 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 2087 dbg("%s", "Invalid Serial \n");
2088 return;
2089 }
2090
2091 mos7840_port = mos7840_get_port_private(port);
2092
2093 if (mos7840_port == NULL)
2094 return;
2095
3f542974 2096 if (!mos7840_port->open) {
441b62c1 2097 dbg("%s - port not opened", __func__);
3f542974
PS		 2098 return;
2099 }
2100
2101 dbg("%s\n", "setting termios - ");
2102
2103 cflag = tty->termios->c_cflag;
2104
441b62c1 2105 dbg("%s - clfag %08x iflag %08x", __func__,
3f542974 2106 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
441b62c1 2107 dbg("%s - old clfag %08x old iflag %08x", __func__,
3d3ddce5 2108 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
441b62c1 2109 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 2110
2111 /* change the port settings to the new ones specified */
2112
95da310e 2113 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2114
2115 if (!mos7840_port->read_urb) {
2116 dbg("%s", "URB KILLED !!!!!\n");
2117 return;
2118 }
2119
2120 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2121 mos7840_port->read_urb->dev = serial->dev;
2122 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2123 if (status) {
2124 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2125 status);
2126 }
2127 }
2128 return;
2129}
2130
2131/*****************************************************************************
2132 * mos7840_get_lsr_info - get line status register info
2133 *
2134 * Purpose: Let user call ioctl() to get info when the UART physically
2135 * is emptied. On bus types like RS485, the transmitter must
2136 * release the bus after transmitting. This must be done when
2137 * the transmit shift register is empty, not be done when the
2138 * transmit holding register is empty. This functionality
2139 * allows an RS485 driver to be written in user space.
2140 *****************************************************************************/
2141
95da310e 2142static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2143 unsigned int __user *value)
3f542974
PS		 2144{
2145 int count;
2146 unsigned int result = 0;
2147
95da310e 2148 count = mos7840_chars_in_buffer(tty);
3f542974 2149 if (count == 0) {
441b62c1 2150 dbg("%s -- Empty", __func__);
3f542974
PS		 2151 result = TIOCSER_TEMT;
2152 }
2153
2154 if (copy_to_user(value, &result, sizeof(int)))
2155 return -EFAULT;
2156 return 0;
2157}
2158
3f542974
PS		 2159/*****************************************************************************
2160 * mos7840_set_modem_info
2161 * function to set modem info
2162 *****************************************************************************/
2163
95da310e
AC		 2164/* FIXME: Should be using the model control hooks */
2165
3f542974 2166static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
97c4965d 2167 unsigned int cmd, unsigned int __user *value)
3f542974
PS		 2168{
2169 unsigned int mcr;
2170 unsigned int arg;
2171 __u16 Data;
2172 int status;
2173 struct usb_serial_port *port;
2174
2175 if (mos7840_port == NULL)
2176 return -1;
2177
2178 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 2179 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2180 dbg("%s", "Invalid port \n");
2181 return -1;
2182 }
2183
2184 mcr = mos7840_port->shadowMCR;
2185
2186 if (copy_from_user(&arg, value, sizeof(int)))
2187 return -EFAULT;
2188
2189 switch (cmd) {
2190 case TIOCMBIS:
2191 if (arg & TIOCM_RTS)
2192 mcr |= MCR_RTS;
2193 if (arg & TIOCM_DTR)
2194 mcr |= MCR_RTS;
2195 if (arg & TIOCM_LOOP)
2196 mcr |= MCR_LOOPBACK;
2197 break;
2198
2199 case TIOCMBIC:
2200 if (arg & TIOCM_RTS)
2201 mcr &= ~MCR_RTS;
2202 if (arg & TIOCM_DTR)
2203 mcr &= ~MCR_RTS;
2204 if (arg & TIOCM_LOOP)
2205 mcr &= ~MCR_LOOPBACK;
2206 break;
2207
2208 case TIOCMSET:
2209 /* turn off the RTS and DTR and LOOPBACK
2210 * and then only turn on what was asked to */
2211 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK);
2212 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0);
2213 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0);
2214 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0);
2215 break;
2216 }
2217
6b447f04 2218 lock_kernel();
3f542974
PS		 2219 mos7840_port->shadowMCR = mcr;
2220
2221 Data = mos7840_port->shadowMCR;
3f542974 2222 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
6b447f04 2223 unlock_kernel();
3f542974
PS		 2224 if (status < 0) {
2225 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
2226 return -1;
2227 }
2228
2229 return 0;
2230}
2231
2232/*****************************************************************************
2233 * mos7840_get_modem_info
2234 * function to get modem info
2235 *****************************************************************************/
2236
2237static int mos7840_get_modem_info(struct moschip_port *mos7840_port,
97c4965d 2238 unsigned int __user *value)
3f542974
PS		 2239{
2240 unsigned int result = 0;
2241 __u16 msr;
2242 unsigned int mcr = mos7840_port->shadowMCR;
880af9db 2243 mos7840_get_uart_reg(mos7840_port->port,
95da310e 2244 MODEM_STATUS_REGISTER, &msr);
3f542974
PS		 2245 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
2246 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
2247 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
2248 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */
2249 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
2250 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
2251
441b62c1 2252 dbg("%s -- %x", __func__, result);
3f542974
PS		 2253
2254 if (copy_to_user(value, &result, sizeof(int)))
2255 return -EFAULT;
2256 return 0;
2257}
2258
2259/*****************************************************************************
2260 * mos7840_get_serial_info
2261 * function to get information about serial port
2262 *****************************************************************************/
2263
2264static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2265 struct serial_struct __user *retinfo)
3f542974
PS		 2266{
2267 struct serial_struct tmp;
2268
2269 if (mos7840_port == NULL)
2270 return -1;
2271
2272 if (!retinfo)
2273 return -EFAULT;
2274
2275 memset(&tmp, 0, sizeof(tmp));
2276
2277 tmp.type = PORT_16550A;
2278 tmp.line = mos7840_port->port->serial->minor;
2279 tmp.port = mos7840_port->port->number;
2280 tmp.irq = 0;
2281 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2282 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2283 tmp.baud_base = 9600;
2284 tmp.close_delay = 5 * HZ;
2285 tmp.closing_wait = 30 * HZ;
2286
2287 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2288 return -EFAULT;
2289 return 0;
2290}
2291
2292/*****************************************************************************
2293 * SerialIoctl
2294 * this function handles any ioctl calls to the driver
2295 *****************************************************************************/
2296
95da310e 2297static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
3f542974
PS		 2298 unsigned int cmd, unsigned long arg)
2299{
95da310e 2300 struct usb_serial_port *port = tty->driver_data;
97c4965d 2301 void __user *argp = (void __user *)arg;
3f542974 2302 struct moschip_port *mos7840_port;
3f542974
PS		 2303
2304 struct async_icount cnow;
2305 struct async_icount cprev;
2306 struct serial_icounter_struct icount;
2307 int mosret = 0;
3f542974 2308
441b62c1 2309 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2310 dbg("%s", "Invalid port \n");
2311 return -1;
2312 }
2313
2314 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2315
2316 if (mos7840_port == NULL)
2317 return -1;
2318
441b62c1 2319 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
3f542974
PS		 2320
2321 switch (cmd) {
2322 /* return number of bytes available */
2323
3f542974 2324 case TIOCSERGETLSR:
441b62c1 2325 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
95da310e 2326 return mos7840_get_lsr_info(tty, argp);
3f542974
PS		 2327 return 0;
2328
95da310e 2329 /* FIXME: use the modem hooks and remove this */
3f542974
PS		 2330 case TIOCMBIS:
2331 case TIOCMBIC:
2332 case TIOCMSET:
441b62c1 2333 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__,
3f542974
PS		 2334 port->number);
2335 mosret =
97c4965d 2336 mos7840_set_modem_info(mos7840_port, cmd, argp);
3f542974
PS		 2337 return mosret;
2338
2339 case TIOCMGET:
441b62c1 2340 dbg("%s (%d) TIOCMGET", __func__, port->number);
97c4965d 2341 return mos7840_get_modem_info(mos7840_port, argp);
3f542974
PS		 2342
2343 case TIOCGSERIAL:
441b62c1 2344 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
97c4965d 2345 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2346
2347 case TIOCSSERIAL:
441b62c1 2348 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
3f542974
PS		 2349 break;
2350
2351 case TIOCMIWAIT:
441b62c1 2352 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
3f542974
PS		 2353 cprev = mos7840_port->icount;
2354 while (1) {
880af9db 2355 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974
PS		 2356 mos7840_port->delta_msr_cond = 0;
2357 wait_event_interruptible(mos7840_port->delta_msr_wait,
2358 (mos7840_port->
2359 delta_msr_cond == 1));
2360
2361 /* see if a signal did it */
2362 if (signal_pending(current))
2363 return -ERESTARTSYS;
2364 cnow = mos7840_port->icount;
0de9a702 2365 smp_rmb();
3f542974
PS		 2366 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2367 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2368 return -EIO; /* no change => error */
2369 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2370 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2371 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2372 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2373 return 0;
2374 }
2375 cprev = cnow;
2376 }
2377 /* NOTREACHED */
2378 break;
2379
2380 case TIOCGICOUNT:
2381 cnow = mos7840_port->icount;
0de9a702 2382 smp_rmb();
3f542974
PS		 2383 icount.cts = cnow.cts;
2384 icount.dsr = cnow.dsr;
2385 icount.rng = cnow.rng;
2386 icount.dcd = cnow.dcd;
2387 icount.rx = cnow.rx;
2388 icount.tx = cnow.tx;
2389 icount.frame = cnow.frame;
2390 icount.overrun = cnow.overrun;
2391 icount.parity = cnow.parity;
2392 icount.brk = cnow.brk;
2393 icount.buf_overrun = cnow.buf_overrun;
2394
441b62c1 2395 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
3f542974 2396 port->number, icount.rx, icount.tx);
97c4965d 2397 if (copy_to_user(argp, &icount, sizeof(icount)))
3f542974
PS		 2398 return -EFAULT;
2399 return 0;
3f542974
PS		 2400 default:
2401 break;
2402 }
3f542974
PS		 2403 return -ENOIOCTLCMD;
2404}
2405
2406static int mos7840_calc_num_ports(struct usb_serial *serial)
2407{
0de9a702 2408 int mos7840_num_ports = 0;
3f542974
PS		 2409
2410 dbg("numberofendpoints: %d \n",
2411 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
2412 dbg("numberofendpoints: %d \n",
2413 (int)serial->interface->altsetting->desc.bNumEndpoints);
2414 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
0de9a702 2415 mos7840_num_ports = serial->num_ports = 2;
3f542974 2416 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
0de9a702
ON		 2417 serial->num_bulk_in = 4;
2418 serial->num_bulk_out = 4;
2419 mos7840_num_ports = serial->num_ports = 4;
3f542974
PS		 2420 }
2421
2422 return mos7840_num_ports;
2423}
2424
2425/****************************************************************************
2426 * mos7840_startup
2427 ****************************************************************************/
2428
2429static int mos7840_startup(struct usb_serial *serial)
2430{
2431 struct moschip_port *mos7840_port;
2432 struct usb_device *dev;
2433 int i, status;
2434
2435 __u16 Data;
2436 dbg("%s \n", " mos7840_startup :entering..........");
2437
2438 if (!serial) {
2439 dbg("%s\n", "Invalid Handler");
2440 return -1;
2441 }
2442
2443 dev = serial->dev;
2444
2445 dbg("%s\n", "Entering...");
2446
2447 /* we set up the pointers to the endpoints in the mos7840_open *
2448 * function, as the structures aren't created yet. */
2449
2450 /* set up port private structures */
2451 for (i = 0; i < serial->num_ports; ++i) {
7ac9da10 2452 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
3f542974 2453 if (mos7840_port == NULL) {
194343d9 2454 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
0de9a702
ON		 2455 status = -ENOMEM;
2456 i--; /* don't follow NULL pointer cleaning up */
2457 goto error;
3f542974 2458 }
3f542974 2459
880af9db
AC		 2460 /* Initialize all port interrupt end point to port 0 int
2461 * endpoint. Our device has only one interrupt end point
2462 * common to all port */
3f542974
PS		 2463
2464 mos7840_port->port = serial->port[i];
2465 mos7840_set_port_private(serial->port[i], mos7840_port);
0de9a702 2466 spin_lock_init(&mos7840_port->pool_lock);
3f542974
PS		 2467
2468 mos7840_port->port_num = ((serial->port[i]->number -
2469 (serial->port[i]->serial->minor)) +
2470 1);
2471
2472 if (mos7840_port->port_num == 1) {
2473 mos7840_port->SpRegOffset = 0x0;
2474 mos7840_port->ControlRegOffset = 0x1;
2475 mos7840_port->DcrRegOffset = 0x4;
2476 } else if ((mos7840_port->port_num == 2)
0de9a702 2477 && (serial->num_ports == 4)) {
3f542974
PS		 2478 mos7840_port->SpRegOffset = 0x8;
2479 mos7840_port->ControlRegOffset = 0x9;
2480 mos7840_port->DcrRegOffset = 0x16;
2481 } else if ((mos7840_port->port_num == 2)
0de9a702 2482 && (serial->num_ports == 2)) {
3f542974
PS		 2483 mos7840_port->SpRegOffset = 0xa;
2484 mos7840_port->ControlRegOffset = 0xb;
2485 mos7840_port->DcrRegOffset = 0x19;
2486 } else if ((mos7840_port->port_num == 3)
0de9a702 2487 && (serial->num_ports == 4)) {
3f542974
PS		 2488 mos7840_port->SpRegOffset = 0xa;
2489 mos7840_port->ControlRegOffset = 0xb;
2490 mos7840_port->DcrRegOffset = 0x19;
2491 } else if ((mos7840_port->port_num == 4)
0de9a702 2492 && (serial->num_ports == 4)) {
3f542974
PS		 2493 mos7840_port->SpRegOffset = 0xc;
2494 mos7840_port->ControlRegOffset = 0xd;
2495 mos7840_port->DcrRegOffset = 0x1c;
2496 }
2497 mos7840_dump_serial_port(mos7840_port);
3f542974
PS		 2498 mos7840_set_port_private(serial->port[i], mos7840_port);
2499
880af9db
AC		 2500 /* enable rx_disable bit in control register */
2501 status = mos7840_get_reg_sync(serial->port[i],
2502 mos7840_port->ControlRegOffset, &Data);
3f542974
PS		 2503 if (status < 0) {
2504 dbg("Reading ControlReg failed status-0x%x\n", status);
2505 break;
2506 } else
2507 dbg("ControlReg Reading success val is %x, status%d\n",
2508 Data, status);
880af9db
AC		 2509 Data |= 0x08; /* setting driver done bit */
2510 Data |= 0x04; /* sp1_bit to have cts change reflect in
2511 modem status reg */
3f542974 2512
880af9db
AC		 2513 /* Data |= 0x20; //rx_disable bit */
2514 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2515 mos7840_port->ControlRegOffset, Data);
2516 if (status < 0) {
2517 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2518 break;
2519 } else
2520 dbg("ControlReg Writing success(rx_disable) status%d\n",
2521 status);
2522
880af9db
AC		 2523 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2524 and 0x24 in DCR3 */
3f542974 2525 Data = 0x01;
880af9db
AC		 2526 status = mos7840_set_reg_sync(serial->port[i],
2527 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
3f542974
PS		 2528 if (status < 0) {
2529 dbg("Writing DCR0 failed status-0x%x\n", status);
2530 break;
2531 } else
2532 dbg("DCR0 Writing success status%d\n", status);
2533
2534 Data = 0x05;
880af9db
AC		 2535 status = mos7840_set_reg_sync(serial->port[i],
2536 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
3f542974
PS		 2537 if (status < 0) {
2538 dbg("Writing DCR1 failed status-0x%x\n", status);
2539 break;
2540 } else
2541 dbg("DCR1 Writing success status%d\n", status);
2542
2543 Data = 0x24;
880af9db
AC		 2544 status = mos7840_set_reg_sync(serial->port[i],
2545 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
3f542974
PS		 2546 if (status < 0) {
2547 dbg("Writing DCR2 failed status-0x%x\n", status);
2548 break;
2549 } else
2550 dbg("DCR2 Writing success status%d\n", status);
2551
880af9db 2552 /* write values in clkstart0x0 and clkmulti 0x20 */
3f542974 2553 Data = 0x0;
880af9db 2554 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2555 CLK_START_VALUE_REGISTER, Data);
2556 if (status < 0) {
2557 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2558 break;
2559 } else
2560 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2561
2562 Data = 0x20;
880af9db
AC		 2563 status = mos7840_set_reg_sync(serial->port[i],
2564 CLK_MULTI_REGISTER, Data);
3f542974
PS		 2565 if (status < 0) {
2566 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
2567 status);
0de9a702 2568 goto error;
3f542974
PS		 2569 } else
2570 dbg("CLK_MULTI_REGISTER Writing success status%d\n",
2571 status);
2572
880af9db 2573 /* write value 0x0 to scratchpad register */
3f542974 2574 Data = 0x00;
880af9db
AC		 2575 status = mos7840_set_uart_reg(serial->port[i],
2576 SCRATCH_PAD_REGISTER, Data);
3f542974
PS		 2577 if (status < 0) {
2578 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
2579 status);
2580 break;
2581 } else
2582 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
2583 status);
2584
880af9db 2585 /* Zero Length flag register */
3f542974 2586 if ((mos7840_port->port_num != 1)
0de9a702 2587 && (serial->num_ports == 2)) {
3f542974
PS		 2588
2589 Data = 0xff;
3f542974 2590 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2591 (__u16) (ZLP_REG1 +
2592 ((__u16)mos7840_port->port_num)), Data);
3f542974
PS		 2593 dbg("ZLIP offset%x\n",
2594 (__u16) (ZLP_REG1 +
880af9db 2595 ((__u16) mos7840_port->port_num)));
3f542974
PS		 2596 if (status < 0) {
2597 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2598 i + 2, status);
2599 break;
2600 } else
2601 dbg("ZLP_REG%d Writing success status%d\n",
2602 i + 2, status);
2603 } else {
2604 Data = 0xff;
3f542974 2605 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2606 (__u16) (ZLP_REG1 +
2607 ((__u16)mos7840_port->port_num) - 0x1), Data);
3f542974
PS		 2608 dbg("ZLIP offset%x\n",
2609 (__u16) (ZLP_REG1 +
2610 ((__u16) mos7840_port->port_num) - 0x1));
2611 if (status < 0) {
2612 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2613 i + 1, status);
2614 break;
2615 } else
2616 dbg("ZLP_REG%d Writing success status%d\n",
2617 i + 1, status);
2618
2619 }
0de9a702 2620 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974 2621 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
880af9db
AC		 2622 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2623 GFP_KERNEL);
2624 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2625 !mos7840_port->dr) {
0de9a702
ON		 2626 status = -ENOMEM;
2627 goto error;
2628 }
3f542974
PS		 2629 }
2630
880af9db 2631 /* Zero Length flag enable */
3f542974 2632 Data = 0x0f;
3f542974
PS		 2633 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2634 if (status < 0) {
2635 dbg("Writing ZLP_REG5 failed status-0x%x\n", status);
7ced46c3 2636 goto error;
3f542974
PS		 2637 } else
2638 dbg("ZLP_REG5 Writing success status%d\n", status);
2639
2640 /* setting configuration feature to one */
2641 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
97c4965d 2642 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
3f542974 2643 return 0;
0de9a702
ON		 2644error:
2645 for (/* nothing */; i >= 0; i--) {
2646 mos7840_port = mos7840_get_port_private(serial->port[i]);
2647
2648 kfree(mos7840_port->dr);
2649 kfree(mos7840_port->ctrl_buf);
2650 usb_free_urb(mos7840_port->control_urb);
2651 kfree(mos7840_port);
2652 serial->port[i] = NULL;
2653 }
2654 return status;
3f542974
PS		 2655}
2656
2657/****************************************************************************
2658 * mos7840_shutdown
2659 * This function is called whenever the device is removed from the usb bus.
2660 ****************************************************************************/
2661
2662static void mos7840_shutdown(struct usb_serial *serial)
2663{
2664 int i;
0de9a702 2665 unsigned long flags;
3f542974
PS		 2666 struct moschip_port *mos7840_port;
2667 dbg("%s \n", " shutdown :entering..........");
2668
2669 if (!serial) {
2670 dbg("%s", "Invalid Handler \n");
2671 return;
2672 }
2673
880af9db 2674 /* check for the ports to be closed,close the ports and disconnect */
3f542974
PS		 2675
2676 /* free private structure allocated for serial port *
2677 * stop reads and writes on all ports */
2678
2679 for (i = 0; i < serial->num_ports; ++i) {
2680 mos7840_port = mos7840_get_port_private(serial->port[i]);
0de9a702
ON		 2681 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2682 mos7840_port->zombie = 1;
2683 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 2684 usb_kill_urb(mos7840_port->control_urb);
0de9a702
ON		 2685 kfree(mos7840_port->ctrl_buf);
2686 kfree(mos7840_port->dr);
3f542974
PS		 2687 kfree(mos7840_port);
2688 mos7840_set_port_private(serial->port[i], NULL);
2689 }
2690
2691 dbg("%s\n", "Thank u :: ");
2692
2693}
2694
d9b1b787
JH		 2695static struct usb_driver io_driver = {
2696 .name = "mos7840",
2697 .probe = usb_serial_probe,
2698 .disconnect = usb_serial_disconnect,
2699 .id_table = moschip_id_table_combined,
2700 .no_dynamic_id = 1,
2701};
2702
3f542974
PS		 2703static struct usb_serial_driver moschip7840_4port_device = {
2704 .driver = {
2705 .owner = THIS_MODULE,
2706 .name = "mos7840",
2707 },
2708 .description = DRIVER_DESC,
d9b1b787 2709 .usb_driver = &io_driver,
3f542974 2710 .id_table = moschip_port_id_table,
3f542974 2711 .num_ports = 4,
3f542974
PS		 2712 .open = mos7840_open,
2713 .close = mos7840_close,
2714 .write = mos7840_write,
2715 .write_room = mos7840_write_room,
2716 .chars_in_buffer = mos7840_chars_in_buffer,
2717 .throttle = mos7840_throttle,
2718 .unthrottle = mos7840_unthrottle,
2719 .calc_num_ports = mos7840_calc_num_ports,
2720#ifdef MCSSerialProbe
2721 .probe = mos7840_serial_probe,
2722#endif
2723 .ioctl = mos7840_ioctl,
2724 .set_termios = mos7840_set_termios,
2725 .break_ctl = mos7840_break,
2726 .tiocmget = mos7840_tiocmget,
2727 .tiocmset = mos7840_tiocmset,
2728 .attach = mos7840_startup,
2729 .shutdown = mos7840_shutdown,
2730 .read_bulk_callback = mos7840_bulk_in_callback,
2731 .read_int_callback = mos7840_interrupt_callback,
2732};
2733
3f542974
PS		 2734/****************************************************************************
2735 * moschip7840_init
2736 * This is called by the module subsystem, or on startup to initialize us
2737 ****************************************************************************/
2738static int __init moschip7840_init(void)
2739{
2740 int retval;
2741
2742 dbg("%s \n", " mos7840_init :entering..........");
2743
2744 /* Register with the usb serial */
2745 retval = usb_serial_register(&moschip7840_4port_device);
2746
2747 if (retval)
2748 goto failed_port_device_register;
2749
2750 dbg("%s\n", "Entring...");
c197a8db
GKH		 2751 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2752 DRIVER_DESC "\n");
3f542974
PS		 2753
2754 /* Register with the usb */
2755 retval = usb_register(&io_driver);
3f542974
PS		 2756 if (retval == 0) {
2757 dbg("%s\n", "Leaving...");
2758 return 0;
2759 }
3f542974 2760 usb_serial_deregister(&moschip7840_4port_device);
880af9db 2761failed_port_device_register:
3f542974
PS		 2762 return retval;
2763}
2764
2765/****************************************************************************
2766 * moschip7840_exit
2767 * Called when the driver is about to be unloaded.
2768 ****************************************************************************/
2769static void __exit moschip7840_exit(void)
2770{
2771
2772 dbg("%s \n", " mos7840_exit :entering..........");
2773
2774 usb_deregister(&io_driver);
2775
2776 usb_serial_deregister(&moschip7840_4port_device);
2777
2778 dbg("%s\n", "Entring...");
2779}
2780
2781module_init(moschip7840_init);
2782module_exit(moschip7840_exit);
2783
2784/* Module information */
2785MODULE_DESCRIPTION(DRIVER_DESC);
2786MODULE_LICENSE("GPL");
2787
2788module_param(debug, bool, S_IRUGO | S_IWUSR);
2789MODULE_PARM_DESC(debug, "Debug enabled or not");
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