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USB: mos7840: add new device id
[deliverable/linux.git] / drivers / usb / serial / mos7840.c
CommitLineData
3f542974
PS		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 *
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
18 *
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
22 *
23 */
24
25#include <linux/kernel.h>
26#include <linux/errno.h>
27#include <linux/init.h>
28#include <linux/slab.h>
29#include <linux/tty.h>
30#include <linux/tty_driver.h>
31#include <linux/tty_flip.h>
32#include <linux/module.h>
33#include <linux/serial.h>
34#include <linux/usb.h>
35#include <linux/usb/serial.h>
880af9db 36#include <linux/uaccess.h>
3f542974
PS		 37
38/*
39 * Version Information
40 */
41#define DRIVER_VERSION "1.3.1"
42#define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
43
44/*
45 * 16C50 UART register defines
46 */
47
48#define LCR_BITS_5 0x00 /* 5 bits/char */
49#define LCR_BITS_6 0x01 /* 6 bits/char */
50#define LCR_BITS_7 0x02 /* 7 bits/char */
51#define LCR_BITS_8 0x03 /* 8 bits/char */
52#define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
53
54#define LCR_STOP_1 0x00 /* 1 stop bit */
55#define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
56#define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
57#define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
58
59#define LCR_PAR_NONE 0x00 /* No parity */
60#define LCR_PAR_ODD 0x08 /* Odd parity */
61#define LCR_PAR_EVEN 0x18 /* Even parity */
62#define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
63#define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
64#define LCR_PAR_MASK 0x38 /* Mask for parity field */
65
66#define LCR_SET_BREAK 0x40 /* Set Break condition */
67#define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
68
69#define MCR_DTR 0x01 /* Assert DTR */
70#define MCR_RTS 0x02 /* Assert RTS */
71#define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
72#define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
73#define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
74#define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
75
76#define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
77#define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
78#define MOS7840_MSR_RI 0x40 /* Current state of RI */
79#define MOS7840_MSR_CD 0x80 /* Current state of CD */
80
81/*
82 * Defines used for sending commands to port
83 */
84
880af9db
AC		 85#define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
86#define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
3f542974
PS		 87
88#define MOS_PORT1 0x0200
89#define MOS_PORT2 0x0300
90#define MOS_VENREG 0x0000
91#define MOS_MAX_PORT 0x02
92#define MOS_WRITE 0x0E
93#define MOS_READ 0x0D
94
95/* Requests */
96#define MCS_RD_RTYPE 0xC0
97#define MCS_WR_RTYPE 0x40
98#define MCS_RDREQ 0x0D
99#define MCS_WRREQ 0x0E
100#define MCS_CTRL_TIMEOUT 500
101#define VENDOR_READ_LENGTH (0x01)
102
103#define MAX_NAME_LEN 64
104
880af9db
AC		 105#define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
106#define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
3f542974
PS		 107
108/* For higher baud Rates use TIOCEXBAUD */
109#define TIOCEXBAUD 0x5462
110
111/* vendor id and device id defines */
112
11e1abb4 113/* The native mos7840/7820 component */
3f542974
PS		 114#define USB_VENDOR_ID_MOSCHIP 0x9710
115#define MOSCHIP_DEVICE_ID_7840 0x7840
116#define MOSCHIP_DEVICE_ID_7820 0x7820
11e1abb4
DL		 117/* The native component can have its vendor/device id's overridden
118 * in vendor-specific implementations. Such devices can be handled
119 * by making a change here, in moschip_port_id_table, and in
120 * moschip_id_table_combined
121 */
122#define USB_VENDOR_ID_BANDB 0x0856
123#define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
124#define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
3f542974 125
e9b8cffa
TC		 126/* This driver also supports the ATEN UC2324 device since it is mos7840 based
127 * - if I knew the device id it would also support the ATEN UC2322 */
128#define USB_VENDOR_ID_ATENINTL 0x0557
129#define ATENINTL_DEVICE_ID_UC2324 0x2011
130
11e1abb4 131/* Interrupt Routine Defines */
3f542974
PS		 132
133#define SERIAL_IIR_RLS 0x06
134#define SERIAL_IIR_MS 0x00
135
136/*
137 * Emulation of the bit mask on the LINE STATUS REGISTER.
138 */
139#define SERIAL_LSR_DR 0x0001
140#define SERIAL_LSR_OE 0x0002
141#define SERIAL_LSR_PE 0x0004
142#define SERIAL_LSR_FE 0x0008
143#define SERIAL_LSR_BI 0x0010
144
145#define MOS_MSR_DELTA_CTS 0x10
146#define MOS_MSR_DELTA_DSR 0x20
147#define MOS_MSR_DELTA_RI 0x40
148#define MOS_MSR_DELTA_CD 0x80
149
880af9db 150/* Serial Port register Address */
3f542974
PS		 151#define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
152#define FIFO_CONTROL_REGISTER ((__u16)(0x02))
153#define LINE_CONTROL_REGISTER ((__u16)(0x03))
154#define MODEM_CONTROL_REGISTER ((__u16)(0x04))
155#define LINE_STATUS_REGISTER ((__u16)(0x05))
156#define MODEM_STATUS_REGISTER ((__u16)(0x06))
157#define SCRATCH_PAD_REGISTER ((__u16)(0x07))
158#define DIVISOR_LATCH_LSB ((__u16)(0x00))
159#define DIVISOR_LATCH_MSB ((__u16)(0x01))
160
161#define CLK_MULTI_REGISTER ((__u16)(0x02))
162#define CLK_START_VALUE_REGISTER ((__u16)(0x03))
163
164#define SERIAL_LCR_DLAB ((__u16)(0x0080))
165
166/*
167 * URB POOL related defines
168 */
169#define NUM_URBS 16 /* URB Count */
170#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
171
172
173static struct usb_device_id moschip_port_id_table[] = {
174 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
175 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
11e1abb4
DL		 176 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
177 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
e9b8cffa 178 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
3f542974
PS		 179 {} /* terminating entry */
180};
181
182static __devinitdata struct usb_device_id moschip_id_table_combined[] = {
183 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
184 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
11e1abb4
DL		 185 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
186 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
e9b8cffa 187 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
3f542974
PS		 188 {} /* terminating entry */
189};
190
191MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
192
193/* This structure holds all of the local port information */
194
195struct moschip_port {
196 int port_num; /*Actual port number in the device(1,2,etc) */
197 struct urb *write_urb; /* write URB for this port */
198 struct urb *read_urb; /* read URB for this port */
0de9a702 199 struct urb *int_urb;
3f542974
PS		 200 __u8 shadowLCR; /* last LCR value received */
201 __u8 shadowMCR; /* last MCR value received */
202 char open;
0de9a702
ON		 203 char open_ports;
204 char zombie;
3f542974
PS		 205 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
206 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
207 int delta_msr_cond;
208 struct async_icount icount;
209 struct usb_serial_port *port; /* loop back to the owner of this object */
210
880af9db 211 /* Offsets */
3f542974
PS		 212 __u8 SpRegOffset;
213 __u8 ControlRegOffset;
214 __u8 DcrRegOffset;
880af9db 215 /* for processing control URBS in interrupt context */
3f542974 216 struct urb *control_urb;
0de9a702 217 struct usb_ctrlrequest *dr;
3f542974
PS		 218 char *ctrl_buf;
219 int MsrLsr;
220
0de9a702 221 spinlock_t pool_lock;
3f542974 222 struct urb *write_urb_pool[NUM_URBS];
0de9a702 223 char busy[NUM_URBS];
50de36f7 224 bool read_urb_busy;
3f542974
PS		 225};
226
227
228static int debug;
3f542974
PS		 229
230/*
231 * mos7840_set_reg_sync
232 * To set the Control register by calling usb_fill_control_urb function
233 * by passing usb_sndctrlpipe function as parameter.
234 */
235
236static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
237 __u16 val)
238{
239 struct usb_device *dev = port->serial->dev;
240 val = val & 0x00ff;
241 dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
242
243 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
244 MCS_WR_RTYPE, val, reg, NULL, 0,
245 MOS_WDR_TIMEOUT);
246}
247
248/*
249 * mos7840_get_reg_sync
250 * To set the Uart register by calling usb_fill_control_urb function by
251 * passing usb_rcvctrlpipe function as parameter.
252 */
253
254static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
880af9db 255 __u16 *val)
3f542974
PS		 256{
257 struct usb_device *dev = port->serial->dev;
258 int ret = 0;
259
260 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
261 MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH,
262 MOS_WDR_TIMEOUT);
263 dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val);
264 *val = (*val) & 0x00ff;
265 return ret;
266}
267
268/*
269 * mos7840_set_uart_reg
270 * To set the Uart register by calling usb_fill_control_urb function by
271 * passing usb_sndctrlpipe function as parameter.
272 */
273
274static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
275 __u16 val)
276{
277
278 struct usb_device *dev = port->serial->dev;
279 val = val & 0x00ff;
880af9db
AC		 280 /* For the UART control registers, the application number need
281 to be Or'ed */
0de9a702 282 if (port->serial->num_ports == 4) {
880af9db
AC		 283 val |= (((__u16) port->number -
284 (__u16) (port->serial->minor)) + 1) << 8;
3f542974
PS		 285 dbg("mos7840_set_uart_reg application number is %x\n", val);
286 } else {
287 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 288 val |= (((__u16) port->number -
3f542974
PS		 289 (__u16) (port->serial->minor)) + 1) << 8;
290 dbg("mos7840_set_uart_reg application number is %x\n",
291 val);
292 } else {
293 val |=
294 (((__u16) port->number -
295 (__u16) (port->serial->minor)) + 2) << 8;
296 dbg("mos7840_set_uart_reg application number is %x\n",
297 val);
298 }
299 }
300 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
301 MCS_WR_RTYPE, val, reg, NULL, 0,
302 MOS_WDR_TIMEOUT);
303
304}
305
306/*
307 * mos7840_get_uart_reg
308 * To set the Control register by calling usb_fill_control_urb function
309 * by passing usb_rcvctrlpipe function as parameter.
310 */
311static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
880af9db 312 __u16 *val)
3f542974
PS		 313{
314 struct usb_device *dev = port->serial->dev;
315 int ret = 0;
316 __u16 Wval;
317
880af9db
AC		 318 /* dbg("application number is %4x \n",
319 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
320 /* Wval is same as application number */
0de9a702 321 if (port->serial->num_ports == 4) {
3f542974
PS		 322 Wval =
323 (((__u16) port->number - (__u16) (port->serial->minor)) +
324 1) << 8;
325 dbg("mos7840_get_uart_reg application number is %x\n", Wval);
326 } else {
327 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 328 Wval = (((__u16) port->number -
3f542974
PS		 329 (__u16) (port->serial->minor)) + 1) << 8;
330 dbg("mos7840_get_uart_reg application number is %x\n",
331 Wval);
332 } else {
880af9db 333 Wval = (((__u16) port->number -
3f542974
PS		 334 (__u16) (port->serial->minor)) + 2) << 8;
335 dbg("mos7840_get_uart_reg application number is %x\n",
336 Wval);
337 }
338 }
339 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
340 MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH,
341 MOS_WDR_TIMEOUT);
342 *val = (*val) & 0x00ff;
343 return ret;
344}
345
346static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
347{
348
349 dbg("***************************************\n");
350 dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
351 dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset);
352 dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset);
353 dbg("***************************************\n");
354
355}
356
357/************************************************************************/
358/************************************************************************/
359/* I N T E R F A C E F U N C T I O N S */
360/* I N T E R F A C E F U N C T I O N S */
361/************************************************************************/
362/************************************************************************/
363
364static inline void mos7840_set_port_private(struct usb_serial_port *port,
365 struct moschip_port *data)
366{
367 usb_set_serial_port_data(port, (void *)data);
368}
369
370static inline struct moschip_port *mos7840_get_port_private(struct
371 usb_serial_port
372 *port)
373{
374 return (struct moschip_port *)usb_get_serial_port_data(port);
375}
376
0de9a702 377static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
3f542974
PS		 378{
379 struct moschip_port *mos7840_port;
380 struct async_icount *icount;
381 mos7840_port = port;
382 icount = &mos7840_port->icount;
383 if (new_msr &
384 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
385 MOS_MSR_DELTA_CD)) {
386 icount = &mos7840_port->icount;
387
388 /* update input line counters */
389 if (new_msr & MOS_MSR_DELTA_CTS) {
390 icount->cts++;
0de9a702 391 smp_wmb();
3f542974
PS		 392 }
393 if (new_msr & MOS_MSR_DELTA_DSR) {
394 icount->dsr++;
0de9a702 395 smp_wmb();
3f542974
PS		 396 }
397 if (new_msr & MOS_MSR_DELTA_CD) {
398 icount->dcd++;
0de9a702 399 smp_wmb();
3f542974
PS		 400 }
401 if (new_msr & MOS_MSR_DELTA_RI) {
402 icount->rng++;
0de9a702 403 smp_wmb();
3f542974
PS		 404 }
405 }
3f542974
PS		 406}
407
0de9a702 408static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
3f542974
PS		 409{
410 struct async_icount *icount;
411
441b62c1 412 dbg("%s - %02x", __func__, new_lsr);
3f542974
PS		 413
414 if (new_lsr & SERIAL_LSR_BI) {
880af9db
AC		 415 /*
416 * Parity and Framing errors only count if they
417 * occur exclusive of a break being
418 * received.
419 */
3f542974
PS		 420 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
421 }
422
423 /* update input line counters */
424 icount = &port->icount;
425 if (new_lsr & SERIAL_LSR_BI) {
426 icount->brk++;
0de9a702 427 smp_wmb();
3f542974
PS		 428 }
429 if (new_lsr & SERIAL_LSR_OE) {
430 icount->overrun++;
0de9a702 431 smp_wmb();
3f542974
PS		 432 }
433 if (new_lsr & SERIAL_LSR_PE) {
434 icount->parity++;
0de9a702 435 smp_wmb();
3f542974
PS		 436 }
437 if (new_lsr & SERIAL_LSR_FE) {
438 icount->frame++;
0de9a702 439 smp_wmb();
3f542974 440 }
3f542974
PS		 441}
442
443/************************************************************************/
444/************************************************************************/
445/* U S B C A L L B A C K F U N C T I O N S */
446/* U S B C A L L B A C K F U N C T I O N S */
447/************************************************************************/
448/************************************************************************/
449
7d12e780 450static void mos7840_control_callback(struct urb *urb)
3f542974
PS		 451{
452 unsigned char *data;
453 struct moschip_port *mos7840_port;
454 __u8 regval = 0x0;
0de9a702 455 int result = 0;
0643c724 456 int status = urb->status;
3f542974 457
cdc97792 458 mos7840_port = urb->context;
0de9a702 459
0643c724 460 switch (status) {
3f542974
PS		 461 case 0:
462 /* success */
463 break;
464 case -ECONNRESET:
465 case -ENOENT:
466 case -ESHUTDOWN:
467 /* this urb is terminated, clean up */
441b62c1 468 dbg("%s - urb shutting down with status: %d", __func__,
0643c724 469 status);
3f542974
PS		 470 return;
471 default:
441b62c1 472 dbg("%s - nonzero urb status received: %d", __func__,
0643c724 473 status);
3f542974
PS		 474 goto exit;
475 }
476
441b62c1
HH		 477 dbg("%s urb buffer size is %d\n", __func__, urb->actual_length);
478 dbg("%s mos7840_port->MsrLsr is %d port %d\n", __func__,
3f542974
PS		 479 mos7840_port->MsrLsr, mos7840_port->port_num);
480 data = urb->transfer_buffer;
481 regval = (__u8) data[0];
441b62c1 482 dbg("%s data is %x\n", __func__, regval);
3f542974
PS		 483 if (mos7840_port->MsrLsr == 0)
484 mos7840_handle_new_msr(mos7840_port, regval);
485 else if (mos7840_port->MsrLsr == 1)
486 mos7840_handle_new_lsr(mos7840_port, regval);
487
0de9a702
ON		 488exit:
489 spin_lock(&mos7840_port->pool_lock);
490 if (!mos7840_port->zombie)
491 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
492 spin_unlock(&mos7840_port->pool_lock);
493 if (result) {
494 dev_err(&urb->dev->dev,
495 "%s - Error %d submitting interrupt urb\n",
441b62c1 496 __func__, result);
0de9a702 497 }
3f542974
PS		 498}
499
500static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
880af9db 501 __u16 *val)
3f542974
PS		 502{
503 struct usb_device *dev = mcs->port->serial->dev;
0de9a702
ON		 504 struct usb_ctrlrequest *dr = mcs->dr;
505 unsigned char *buffer = mcs->ctrl_buf;
506 int ret;
3f542974 507
3f542974
PS		 508 dr->bRequestType = MCS_RD_RTYPE;
509 dr->bRequest = MCS_RDREQ;
880af9db 510 dr->wValue = cpu_to_le16(Wval); /* 0 */
3f542974
PS		 511 dr->wIndex = cpu_to_le16(reg);
512 dr->wLength = cpu_to_le16(2);
513
514 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
515 (unsigned char *)dr, buffer, 2,
516 mos7840_control_callback, mcs);
517 mcs->control_urb->transfer_buffer_length = 2;
518 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
519 return ret;
520}
521
522/*****************************************************************************
523 * mos7840_interrupt_callback
524 * this is the callback function for when we have received data on the
525 * interrupt endpoint.
526 *****************************************************************************/
527
7d12e780 528static void mos7840_interrupt_callback(struct urb *urb)
3f542974
PS		 529{
530 int result;
531 int length;
532 struct moschip_port *mos7840_port;
533 struct usb_serial *serial;
534 __u16 Data;
535 unsigned char *data;
536 __u8 sp[5], st;
0de9a702
ON		 537 int i, rv = 0;
538 __u16 wval, wreg = 0;
0643c724 539 int status = urb->status;
3f542974
PS		 540
541 dbg("%s", " : Entering\n");
3f542974 542
0643c724 543 switch (status) {
3f542974
PS		 544 case 0:
545 /* success */
546 break;
547 case -ECONNRESET:
548 case -ENOENT:
549 case -ESHUTDOWN:
550 /* this urb is terminated, clean up */
441b62c1 551 dbg("%s - urb shutting down with status: %d", __func__,
0643c724 552 status);
3f542974
PS		 553 return;
554 default:
441b62c1 555 dbg("%s - nonzero urb status received: %d", __func__,
0643c724 556 status);
3f542974
PS		 557 goto exit;
558 }
559
560 length = urb->actual_length;
561 data = urb->transfer_buffer;
562
cdc97792 563 serial = urb->context;
3f542974
PS		 564
565 /* Moschip get 5 bytes
566 * Byte 1 IIR Port 1 (port.number is 0)
567 * Byte 2 IIR Port 2 (port.number is 1)
568 * Byte 3 IIR Port 3 (port.number is 2)
569 * Byte 4 IIR Port 4 (port.number is 3)
570 * Byte 5 FIFO status for both */
571
572 if (length && length > 5) {
573 dbg("%s \n", "Wrong data !!!");
574 return;
575 }
576
577 sp[0] = (__u8) data[0];
578 sp[1] = (__u8) data[1];
579 sp[2] = (__u8) data[2];
580 sp[3] = (__u8) data[3];
581 st = (__u8) data[4];
582
583 for (i = 0; i < serial->num_ports; i++) {
584 mos7840_port = mos7840_get_port_private(serial->port[i]);
585 wval =
586 (((__u16) serial->port[i]->number -
587 (__u16) (serial->minor)) + 1) << 8;
588 if (mos7840_port->open) {
589 if (sp[i] & 0x01) {
590 dbg("SP%d No Interrupt !!!\n", i);
591 } else {
592 switch (sp[i] & 0x0f) {
593 case SERIAL_IIR_RLS:
594 dbg("Serial Port %d: Receiver status error or ", i);
595 dbg("address bit detected in 9-bit mode\n");
596 mos7840_port->MsrLsr = 1;
0de9a702 597 wreg = LINE_STATUS_REGISTER;
3f542974
PS		 598 break;
599 case SERIAL_IIR_MS:
600 dbg("Serial Port %d: Modem status change\n", i);
601 mos7840_port->MsrLsr = 0;
0de9a702 602 wreg = MODEM_STATUS_REGISTER;
3f542974
PS		 603 break;
604 }
0de9a702
ON		 605 spin_lock(&mos7840_port->pool_lock);
606 if (!mos7840_port->zombie) {
607 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
608 } else {
609 spin_unlock(&mos7840_port->pool_lock);
610 return;
611 }
612 spin_unlock(&mos7840_port->pool_lock);
3f542974
PS		 613 }
614 }
615 }
880af9db
AC		 616 if (!(rv < 0))
617 /* the completion handler for the control urb will resubmit */
0de9a702
ON		 618 return;
619exit:
3f542974
PS		 620 result = usb_submit_urb(urb, GFP_ATOMIC);
621 if (result) {
622 dev_err(&urb->dev->dev,
623 "%s - Error %d submitting interrupt urb\n",
441b62c1 624 __func__, result);
3f542974 625 }
3f542974
PS		 626}
627
628static int mos7840_port_paranoia_check(struct usb_serial_port *port,
629 const char *function)
630{
631 if (!port) {
632 dbg("%s - port == NULL", function);
633 return -1;
634 }
635 if (!port->serial) {
636 dbg("%s - port->serial == NULL", function);
637 return -1;
638 }
639
640 return 0;
641}
642
643/* Inline functions to check the sanity of a pointer that is passed to us */
644static int mos7840_serial_paranoia_check(struct usb_serial *serial,
645 const char *function)
646{
647 if (!serial) {
648 dbg("%s - serial == NULL", function);
649 return -1;
650 }
651 if (!serial->type) {
652 dbg("%s - serial->type == NULL!", function);
653 return -1;
654 }
655
656 return 0;
657}
658
659static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
660 const char *function)
661{
662 /* if no port was specified, or it fails a paranoia check */
663 if (!port ||
664 mos7840_port_paranoia_check(port, function) ||
665 mos7840_serial_paranoia_check(port->serial, function)) {
880af9db
AC		 666 /* then say that we don't have a valid usb_serial thing,
667 * which will end up genrating -ENODEV return values */
3f542974
PS		 668 return NULL;
669 }
670
671 return port->serial;
672}
673
674/*****************************************************************************
675 * mos7840_bulk_in_callback
676 * this is the callback function for when we have received data on the
677 * bulk in endpoint.
678 *****************************************************************************/
679
7d12e780 680static void mos7840_bulk_in_callback(struct urb *urb)
3f542974 681{
0643c724 682 int retval;
3f542974
PS		 683 unsigned char *data;
684 struct usb_serial *serial;
685 struct usb_serial_port *port;
686 struct moschip_port *mos7840_port;
687 struct tty_struct *tty;
0643c724 688 int status = urb->status;
3f542974 689
cdc97792 690 mos7840_port = urb->context;
3f542974
PS		 691 if (!mos7840_port) {
692 dbg("%s", "NULL mos7840_port pointer \n");
50de36f7
GKH		 693 mos7840_port->read_urb_busy = false;
694 return;
695 }
696
697 if (status) {
698 dbg("nonzero read bulk status received: %d", status);
699 mos7840_port->read_urb_busy = false;
3f542974
PS		 700 return;
701 }
702
703 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 704 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974 705 dbg("%s", "Port Paranoia failed \n");
50de36f7 706 mos7840_port->read_urb_busy = false;
3f542974
PS		 707 return;
708 }
709
441b62c1 710 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 711 if (!serial) {
712 dbg("%s\n", "Bad serial pointer ");
50de36f7 713 mos7840_port->read_urb_busy = false;
3f542974
PS		 714 return;
715 }
716
717 dbg("%s\n", "Entering... \n");
718
719 data = urb->transfer_buffer;
720
721 dbg("%s", "Entering ........... \n");
722
723 if (urb->actual_length) {
4a90f09b 724 tty = tty_port_tty_get(&mos7840_port->port->port);
3f542974
PS		 725 if (tty) {
726 tty_buffer_request_room(tty, urb->actual_length);
727 tty_insert_flip_string(tty, data, urb->actual_length);
728 dbg(" %s \n", data);
729 tty_flip_buffer_push(tty);
4a90f09b 730 tty_kref_put(tty);
3f542974
PS		 731 }
732 mos7840_port->icount.rx += urb->actual_length;
0de9a702 733 smp_wmb();
3f542974
PS		 734 dbg("mos7840_port->icount.rx is %d:\n",
735 mos7840_port->icount.rx);
736 }
737
738 if (!mos7840_port->read_urb) {
739 dbg("%s", "URB KILLED !!!\n");
50de36f7 740 mos7840_port->read_urb_busy = false;
3f542974
PS		 741 return;
742 }
743
3f542974 744
0de9a702 745 mos7840_port->read_urb->dev = serial->dev;
3f542974 746
50de36f7 747 mos7840_port->read_urb_busy = true;
0643c724 748 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
0de9a702 749
0643c724 750 if (retval) {
50de36f7
GKH		 751 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
752 mos7840_port->read_urb_busy = false;
3f542974
PS		 753 }
754}
755
756/*****************************************************************************
757 * mos7840_bulk_out_data_callback
880af9db
AC		 758 * this is the callback function for when we have finished sending
759 * serial data on the bulk out endpoint.
3f542974
PS		 760 *****************************************************************************/
761
7d12e780 762static void mos7840_bulk_out_data_callback(struct urb *urb)
3f542974
PS		 763{
764 struct moschip_port *mos7840_port;
765 struct tty_struct *tty;
0643c724 766 int status = urb->status;
0de9a702
ON		 767 int i;
768
cdc97792 769 mos7840_port = urb->context;
0de9a702
ON		 770 spin_lock(&mos7840_port->pool_lock);
771 for (i = 0; i < NUM_URBS; i++) {
772 if (urb == mos7840_port->write_urb_pool[i]) {
773 mos7840_port->busy[i] = 0;
774 break;
775 }
776 }
777 spin_unlock(&mos7840_port->pool_lock);
778
0643c724
GKH		 779 if (status) {
780 dbg("nonzero write bulk status received:%d\n", status);
3f542974
PS		 781 return;
782 }
783
441b62c1 784 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
3f542974
PS		 785 dbg("%s", "Port Paranoia failed \n");
786 return;
787 }
788
789 dbg("%s \n", "Entering .........");
790
4a90f09b 791 tty = tty_port_tty_get(&mos7840_port->port->port);
b963a844
JS		 792 if (tty && mos7840_port->open)
793 tty_wakeup(tty);
4a90f09b 794 tty_kref_put(tty);
3f542974
PS		 795
796}
797
798/************************************************************************/
799/* 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 */
800/************************************************************************/
801#ifdef MCSSerialProbe
802static int mos7840_serial_probe(struct usb_serial *serial,
803 const struct usb_device_id *id)
804{
805
806 /*need to implement the mode_reg reading and updating\
807 structures usb_serial_ device_type\
808 (i.e num_ports, num_bulkin,bulkout etc) */
809 /* Also we can update the changes attach */
810 return 1;
811}
812#endif
813
814/*****************************************************************************
815 * mos7840_open
816 * this function is called by the tty driver when a port is opened
817 * If successful, we return 0
818 * Otherwise we return a negative error number.
819 *****************************************************************************/
820
95da310e
AC		 821static int mos7840_open(struct tty_struct *tty,
822 struct usb_serial_port *port, struct file *filp)
3f542974
PS		 823{
824 int response;
825 int j;
826 struct usb_serial *serial;
827 struct urb *urb;
828 __u16 Data;
829 int status;
830 struct moschip_port *mos7840_port;
0de9a702 831 struct moschip_port *port0;
3f542974 832
441b62c1 833 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 834 dbg("%s", "Port Paranoia failed \n");
835 return -ENODEV;
836 }
837
3f542974
PS		 838 serial = port->serial;
839
441b62c1 840 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 841 dbg("%s", "Serial Paranoia failed \n");
842 return -ENODEV;
843 }
844
845 mos7840_port = mos7840_get_port_private(port);
0de9a702 846 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 847
0de9a702 848 if (mos7840_port == NULL || port0 == NULL)
3f542974
PS		 849 return -ENODEV;
850
851 usb_clear_halt(serial->dev, port->write_urb->pipe);
852 usb_clear_halt(serial->dev, port->read_urb->pipe);
0de9a702 853 port0->open_ports++;
3f542974
PS		 854
855 /* Initialising the write urb pool */
856 for (j = 0; j < NUM_URBS; ++j) {
0de9a702 857 urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974
PS		 858 mos7840_port->write_urb_pool[j] = urb;
859
860 if (urb == NULL) {
194343d9 861 dev_err(&port->dev, "No more urbs???\n");
3f542974
PS		 862 continue;
863 }
864
880af9db
AC		 865 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
866 GFP_KERNEL);
3f542974 867 if (!urb->transfer_buffer) {
0de9a702
ON		 868 usb_free_urb(urb);
869 mos7840_port->write_urb_pool[j] = NULL;
194343d9
GKH		 870 dev_err(&port->dev,
871 "%s-out of memory for urb buffers.\n",
872 __func__);
3f542974
PS		 873 continue;
874 }
875 }
876
877/*****************************************************************************
878 * Initialize MCS7840 -- Write Init values to corresponding Registers
879 *
880 * Register Index
881 * 1 : IER
882 * 2 : FCR
883 * 3 : LCR
884 * 4 : MCR
885 *
886 * 0x08 : SP1/2 Control Reg
887 *****************************************************************************/
888
880af9db 889 /* NEED to check the following Block */
3f542974 890
3f542974
PS		 891 Data = 0x0;
892 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
893 if (status < 0) {
894 dbg("Reading Spreg failed\n");
895 return -1;
896 }
897 Data |= 0x80;
898 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
899 if (status < 0) {
900 dbg("writing Spreg failed\n");
901 return -1;
902 }
903
904 Data &= ~0x80;
905 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
906 if (status < 0) {
907 dbg("writing Spreg failed\n");
908 return -1;
909 }
880af9db 910 /* End of block to be checked */
3f542974 911
3f542974 912 Data = 0x0;
880af9db
AC		 913 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
914 &Data);
3f542974
PS		 915 if (status < 0) {
916 dbg("Reading Controlreg failed\n");
917 return -1;
918 }
880af9db
AC		 919 Data |= 0x08; /* Driver done bit */
920 Data |= 0x20; /* rx_disable */
921 status = mos7840_set_reg_sync(port,
922 mos7840_port->ControlRegOffset, Data);
3f542974
PS		 923 if (status < 0) {
924 dbg("writing Controlreg failed\n");
925 return -1;
926 }
880af9db
AC		 927 /* do register settings here */
928 /* Set all regs to the device default values. */
929 /***********************************
930 * First Disable all interrupts.
931 ***********************************/
3f542974 932 Data = 0x00;
3f542974
PS		 933 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
934 if (status < 0) {
935 dbg("disableing interrupts failed\n");
936 return -1;
937 }
880af9db 938 /* Set FIFO_CONTROL_REGISTER to the default value */
3f542974 939 Data = 0x00;
3f542974
PS		 940 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
941 if (status < 0) {
942 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
943 return -1;
944 }
945
946 Data = 0xcf;
3f542974
PS		 947 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
948 if (status < 0) {
949 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
950 return -1;
951 }
952
953 Data = 0x03;
3f542974
PS		 954 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
955 mos7840_port->shadowLCR = Data;
956
957 Data = 0x0b;
3f542974
PS		 958 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
959 mos7840_port->shadowMCR = Data;
960
961 Data = 0x00;
3f542974
PS		 962 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
963 mos7840_port->shadowLCR = Data;
964
880af9db 965 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 966 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
967
968 Data = 0x0c;
3f542974
PS		 969 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
970
971 Data = 0x0;
3f542974
PS		 972 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
973
974 Data = 0x00;
3f542974
PS		 975 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
976
977 Data = Data & ~SERIAL_LCR_DLAB;
3f542974
PS		 978 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
979 mos7840_port->shadowLCR = Data;
980
880af9db 981 /* clearing Bulkin and Bulkout Fifo */
3f542974 982 Data = 0x0;
3f542974
PS		 983 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
984
985 Data = Data | 0x0c;
3f542974
PS		 986 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
987
988 Data = Data & ~0x0c;
3f542974 989 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
880af9db 990 /* Finally enable all interrupts */
3f542974 991 Data = 0x0c;
3f542974
PS		 992 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
993
880af9db 994 /* clearing rx_disable */
3f542974 995 Data = 0x0;
880af9db
AC		 996 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
997 &Data);
3f542974 998 Data = Data & ~0x20;
880af9db
AC		 999 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1000 Data);
3f542974 1001
880af9db 1002 /* rx_negate */
3f542974 1003 Data = 0x0;
880af9db
AC		 1004 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1005 &Data);
3f542974 1006 Data = Data | 0x10;
880af9db
AC		 1007 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1008 Data);
3f542974
PS		 1009
1010 /* force low_latency on so that our tty_push actually forces *
1011 * the data through,otherwise it is scheduled, and with *
1012 * high data rates (like with OHCI) data can get lost. */
95da310e
AC		 1013 if (tty)
1014 tty->low_latency = 1;
880af9db
AC		 1015
1016 /* Check to see if we've set up our endpoint info yet *
1017 * (can't set it up in mos7840_startup as the structures *
1018 * were not set up at that time.) */
0de9a702 1019 if (port0->open_ports == 1) {
3f542974 1020 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1021 /* set up interrupt urb */
3f542974 1022 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1023 serial->dev,
1024 usb_rcvintpipe(serial->dev,
1025 serial->port[0]->interrupt_in_endpointAddress),
1026 serial->port[0]->interrupt_in_buffer,
1027 serial->port[0]->interrupt_in_urb->
1028 transfer_buffer_length,
1029 mos7840_interrupt_callback,
1030 serial,
1031 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1032
1033 /* start interrupt read for mos7840 *
1034 * will continue as long as mos7840 is connected */
1035
1036 response =
1037 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1038 GFP_KERNEL);
1039 if (response) {
194343d9
GKH		 1040 dev_err(&port->dev, "%s - Error %d submitting "
1041 "interrupt urb\n", __func__, response);
3f542974
PS		 1042 }
1043
1044 }
1045
1046 }
1047
1048 /* see if we've set up our endpoint info yet *
1049 * (can't set it up in mos7840_startup as the *
1050 * structures were not set up at that time.) */
1051
1052 dbg("port number is %d \n", port->number);
1053 dbg("serial number is %d \n", port->serial->minor);
1054 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress);
1055 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress);
1056 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress);
1057 dbg("port's number in the device is %d\n", mos7840_port->port_num);
1058 mos7840_port->read_urb = port->read_urb;
1059
1060 /* set up our bulk in urb */
1061
1062 usb_fill_bulk_urb(mos7840_port->read_urb,
1063 serial->dev,
1064 usb_rcvbulkpipe(serial->dev,
1065 port->bulk_in_endpointAddress),
1066 port->bulk_in_buffer,
1067 mos7840_port->read_urb->transfer_buffer_length,
1068 mos7840_bulk_in_callback, mos7840_port);
1069
1070 dbg("mos7840_open: bulkin endpoint is %d\n",
1071 port->bulk_in_endpointAddress);
50de36f7 1072 mos7840_port->read_urb_busy = true;
3f542974
PS		 1073 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1074 if (response) {
194343d9
GKH		 1075 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1076 __func__, response);
50de36f7 1077 mos7840_port->read_urb_busy = false;
3f542974
PS		 1078 }
1079
1080 /* initialize our wait queues */
1081 init_waitqueue_head(&mos7840_port->wait_chase);
1082 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1083
1084 /* initialize our icount structure */
1085 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1086
1087 /* initialize our port settings */
880af9db
AC		 1088 /* Must set to enable ints! */
1089 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1090 /* send a open port command */
1091 mos7840_port->open = 1;
880af9db 1092 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974
PS		 1093 mos7840_port->icount.tx = 0;
1094 mos7840_port->icount.rx = 0;
1095
880af9db
AC		 1096 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n",
1097 serial, mos7840_port, port);
3f542974
PS		 1098
1099 return 0;
1100
1101}
1102
1103/*****************************************************************************
1104 * mos7840_chars_in_buffer
1105 * this function is called by the tty driver when it wants to know how many
1106 * bytes of data we currently have outstanding in the port (data that has
1107 * been written, but hasn't made it out the port yet)
1108 * If successful, we return the number of bytes left to be written in the
1109 * system,
95da310e 1110 * Otherwise we return zero.
3f542974
PS		 1111 *****************************************************************************/
1112
95da310e 1113static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1114{
95da310e 1115 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1116 int i;
1117 int chars = 0;
0de9a702 1118 unsigned long flags;
3f542974
PS		 1119 struct moschip_port *mos7840_port;
1120
1121 dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
1122
441b62c1 1123 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974 1124 dbg("%s", "Invalid port \n");
95da310e 1125 return 0;
3f542974
PS		 1126 }
1127
1128 mos7840_port = mos7840_get_port_private(port);
1129 if (mos7840_port == NULL) {
1130 dbg("%s \n", "mos7840_break:leaving ...........");
95da310e 1131 return 0;
3f542974
PS		 1132 }
1133
880af9db 1134 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
95da310e
AC		 1135 for (i = 0; i < NUM_URBS; ++i)
1136 if (mos7840_port->busy[i])
3f542974 1137 chars += URB_TRANSFER_BUFFER_SIZE;
880af9db 1138 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
441b62c1 1139 dbg("%s - returns %d", __func__, chars);
0de9a702 1140 return chars;
3f542974
PS		 1141
1142}
1143
1144/************************************************************************
1145 *
1146 * mos7840_block_until_tx_empty
1147 *
1148 * This function will block the close until one of the following:
1149 * 1. TX count are 0
1150 * 2. The mos7840 has stopped
dc0d5c1e 1151 * 3. A timeout of 3 seconds without activity has expired
3f542974
PS		 1152 *
1153 ************************************************************************/
95da310e
AC		 1154static void mos7840_block_until_tx_empty(struct tty_struct *tty,
1155 struct moschip_port *mos7840_port)
3f542974
PS		 1156{
1157 int timeout = HZ / 10;
1158 int wait = 30;
1159 int count;
1160
1161 while (1) {
1162
95da310e 1163 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1164
1165 /* Check for Buffer status */
880af9db 1166 if (count <= 0)
3f542974 1167 return;
3f542974
PS		 1168
1169 /* Block the thread for a while */
1170 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1171 timeout);
1172
1173 /* No activity.. count down section */
1174 wait--;
1175 if (wait == 0) {
441b62c1 1176 dbg("%s - TIMEOUT", __func__);
3f542974
PS		 1177 return;
1178 } else {
dc0d5c1e 1179 /* Reset timeout value back to seconds */
3f542974
PS		 1180 wait = 30;
1181 }
1182 }
1183}
1184
1185/*****************************************************************************
1186 * mos7840_close
1187 * this function is called by the tty driver when a port is closed
1188 *****************************************************************************/
1189
95da310e
AC		 1190static void mos7840_close(struct tty_struct *tty,
1191 struct usb_serial_port *port, struct file *filp)
3f542974
PS		 1192{
1193 struct usb_serial *serial;
1194 struct moschip_port *mos7840_port;
0de9a702 1195 struct moschip_port *port0;
3f542974
PS		 1196 int j;
1197 __u16 Data;
1198
1199 dbg("%s\n", "mos7840_close:entering...");
1200
441b62c1 1201 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1202 dbg("%s", "Port Paranoia failed \n");
1203 return;
1204 }
1205
441b62c1 1206 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 1207 if (!serial) {
1208 dbg("%s", "Serial Paranoia failed \n");
1209 return;
1210 }
1211
1212 mos7840_port = mos7840_get_port_private(port);
0de9a702 1213 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1214
0de9a702 1215 if (mos7840_port == NULL || port0 == NULL)
3f542974 1216 return;
3f542974
PS		 1217
1218 for (j = 0; j < NUM_URBS; ++j)
1219 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1220
1221 /* Freeing Write URBs */
1222 for (j = 0; j < NUM_URBS; ++j) {
1223 if (mos7840_port->write_urb_pool[j]) {
1224 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1225 kfree(mos7840_port->write_urb_pool[j]->
1226 transfer_buffer);
1227
1228 usb_free_urb(mos7840_port->write_urb_pool[j]);
1229 }
1230 }
1231
95da310e 1232 if (serial->dev)
3f542974 1233 /* flush and block until tx is empty */
95da310e 1234 mos7840_block_until_tx_empty(tty, mos7840_port);
3f542974
PS		 1235
1236 /* While closing port, shutdown all bulk read, write *
1237 * and interrupt read if they exists */
1238 if (serial->dev) {
3f542974
PS		 1239 if (mos7840_port->write_urb) {
1240 dbg("%s", "Shutdown bulk write\n");
1241 usb_kill_urb(mos7840_port->write_urb);
1242 }
3f542974
PS		 1243 if (mos7840_port->read_urb) {
1244 dbg("%s", "Shutdown bulk read\n");
1245 usb_kill_urb(mos7840_port->read_urb);
50de36f7 1246 mos7840_port->read_urb_busy = false;
3f542974
PS		 1247 }
1248 if ((&mos7840_port->control_urb)) {
1249 dbg("%s", "Shutdown control read\n");
880af9db 1250 /*/ usb_kill_urb (mos7840_port->control_urb); */
3f542974
PS		 1251 }
1252 }
880af9db
AC		 1253/* if(mos7840_port->ctrl_buf != NULL) */
1254/* kfree(mos7840_port->ctrl_buf); */
0de9a702 1255 port0->open_ports--;
3f542974 1256 dbg("mos7840_num_open_ports in close%d:in port%d\n",
0de9a702
ON		 1257 port0->open_ports, port->number);
1258 if (port0->open_ports == 0) {
3f542974
PS		 1259 if (serial->port[0]->interrupt_in_urb) {
1260 dbg("%s", "Shutdown interrupt_in_urb\n");
0de9a702 1261 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1262 }
1263 }
1264
1265 if (mos7840_port->write_urb) {
1266 /* if this urb had a transfer buffer already (old tx) free it */
880af9db 1267 if (mos7840_port->write_urb->transfer_buffer != NULL)
3f542974 1268 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1269 usb_free_urb(mos7840_port->write_urb);
1270 }
1271
1272 Data = 0x0;
1273 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1274
1275 Data = 0x00;
1276 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1277
1278 mos7840_port->open = 0;
1279
1280 dbg("%s \n", "Leaving ............");
1281}
1282
1283/************************************************************************
1284 *
1285 * mos7840_block_until_chase_response
1286 *
1287 * This function will block the close until one of the following:
1288 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1289 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1290 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1291 *
1292 ************************************************************************/
1293
95da310e
AC		 1294static void mos7840_block_until_chase_response(struct tty_struct *tty,
1295 struct moschip_port *mos7840_port)
3f542974
PS		 1296{
1297 int timeout = 1 * HZ;
1298 int wait = 10;
1299 int count;
1300
1301 while (1) {
95da310e 1302 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1303
1304 /* Check for Buffer status */
880af9db 1305 if (count <= 0)
3f542974 1306 return;
3f542974
PS		 1307
1308 /* Block the thread for a while */
1309 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1310 timeout);
1311 /* No activity.. count down section */
1312 wait--;
1313 if (wait == 0) {
441b62c1 1314 dbg("%s - TIMEOUT", __func__);
3f542974
PS		 1315 return;
1316 } else {
dc0d5c1e 1317 /* Reset timeout value back to seconds */
3f542974
PS		 1318 wait = 10;
1319 }
1320 }
1321
1322}
1323
1324/*****************************************************************************
1325 * mos7840_break
1326 * this function sends a break to the port
1327 *****************************************************************************/
95da310e 1328static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1329{
95da310e 1330 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1331 unsigned char data;
1332 struct usb_serial *serial;
1333 struct moschip_port *mos7840_port;
1334
1335 dbg("%s \n", "Entering ...........");
1336 dbg("mos7840_break: Start\n");
1337
441b62c1 1338 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1339 dbg("%s", "Port Paranoia failed \n");
1340 return;
1341 }
1342
441b62c1 1343 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 1344 if (!serial) {
1345 dbg("%s", "Serial Paranoia failed \n");
1346 return;
1347 }
1348
1349 mos7840_port = mos7840_get_port_private(port);
1350
880af9db 1351 if (mos7840_port == NULL)
3f542974 1352 return;
3f542974 1353
95da310e 1354 if (serial->dev)
3f542974 1355 /* flush and block until tx is empty */
95da310e 1356 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1357
95da310e 1358 if (break_state == -1)
3f542974 1359 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1360 else
3f542974 1361 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974 1362
6b447f04 1363 /* FIXME: no locking on shadowLCR anywhere in driver */
3f542974
PS		 1364 mos7840_port->shadowLCR = data;
1365 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
1366 mos7840_port->shadowLCR);
1367 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1368 mos7840_port->shadowLCR);
1369
1370 return;
1371}
1372
1373/*****************************************************************************
1374 * mos7840_write_room
1375 * this function is called by the tty driver when it wants to know how many
1376 * bytes of data we can accept for a specific port.
1377 * If successful, we return the amount of room that we have for this port
1378 * Otherwise we return a negative error number.
1379 *****************************************************************************/
1380
95da310e 1381static int mos7840_write_room(struct tty_struct *tty)
3f542974 1382{
95da310e 1383 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1384 int i;
1385 int room = 0;
0de9a702 1386 unsigned long flags;
3f542974
PS		 1387 struct moschip_port *mos7840_port;
1388
1389 dbg("%s \n", " mos7840_write_room:entering ...........");
1390
441b62c1 1391 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1392 dbg("%s", "Invalid port \n");
1393 dbg("%s \n", " mos7840_write_room:leaving ...........");
1394 return -1;
1395 }
1396
1397 mos7840_port = mos7840_get_port_private(port);
1398 if (mos7840_port == NULL) {
1399 dbg("%s \n", "mos7840_break:leaving ...........");
1400 return -1;
1401 }
1402
0de9a702 1403 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1404 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1405 if (!mos7840_port->busy[i])
3f542974 1406 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1407 }
0de9a702 1408 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1409
0de9a702 1410 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
441b62c1 1411 dbg("%s - returns %d", __func__, room);
0de9a702 1412 return room;
3f542974
PS		 1413
1414}
1415
1416/*****************************************************************************
1417 * mos7840_write
1418 * this function is called by the tty driver when data should be written to
1419 * the port.
1420 * If successful, we return the number of bytes written, otherwise we
1421 * return a negative error number.
1422 *****************************************************************************/
1423
95da310e 1424static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1425 const unsigned char *data, int count)
1426{
1427 int status;
1428 int i;
1429 int bytes_sent = 0;
1430 int transfer_size;
0de9a702 1431 unsigned long flags;
3f542974
PS		 1432
1433 struct moschip_port *mos7840_port;
1434 struct usb_serial *serial;
1435 struct urb *urb;
880af9db 1436 /* __u16 Data; */
3f542974
PS		 1437 const unsigned char *current_position = data;
1438 unsigned char *data1;
1439 dbg("%s \n", "entering ...........");
880af9db
AC		 1440 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1441 mos7840_port->shadowLCR); */
3f542974
PS		 1442
1443#ifdef NOTMOS7840
1444 Data = 0x00;
3f542974
PS		 1445 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1446 mos7840_port->shadowLCR = Data;
1447 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
1448 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1449 mos7840_port->shadowLCR);
1450
880af9db
AC		 1451 /* Data = 0x03; */
1452 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1453 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1454
880af9db 1455 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1456 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1457
880af9db
AC		 1458 /* Data = 0x0c; */
1459 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1460 Data = 0x00;
3f542974
PS		 1461 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1462 dbg("mos7840_write:DLL value is %x\n", Data);
1463
1464 Data = 0x0;
3f542974
PS		 1465 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1466 dbg("mos7840_write:DLM value is %x\n", Data);
1467
1468 Data = Data & ~SERIAL_LCR_DLAB;
1469 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1470 mos7840_port->shadowLCR);
3f542974
PS		 1471 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1472#endif
1473
441b62c1 1474 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1475 dbg("%s", "Port Paranoia failed \n");
1476 return -1;
1477 }
1478
1479 serial = port->serial;
441b62c1 1480 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 1481 dbg("%s", "Serial Paranoia failed \n");
1482 return -1;
1483 }
1484
1485 mos7840_port = mos7840_get_port_private(port);
1486 if (mos7840_port == NULL) {
1487 dbg("%s", "mos7840_port is NULL\n");
1488 return -1;
1489 }
1490
1491 /* try to find a free urb in the list */
1492 urb = NULL;
1493
0de9a702 1494 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1495 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1496 if (!mos7840_port->busy[i]) {
1497 mos7840_port->busy[i] = 1;
3f542974
PS		 1498 urb = mos7840_port->write_urb_pool[i];
1499 dbg("\nURB:%d", i);
1500 break;
1501 }
1502 }
0de9a702 1503 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1504
1505 if (urb == NULL) {
441b62c1 1506 dbg("%s - no more free urbs", __func__);
3f542974
PS		 1507 goto exit;
1508 }
1509
1510 if (urb->transfer_buffer == NULL) {
1511 urb->transfer_buffer =
1512 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1513
1514 if (urb->transfer_buffer == NULL) {
194343d9
GKH		 1515 dev_err(&port->dev, "%s no more kernel memory...\n",
1516 __func__);
3f542974
PS		 1517 goto exit;
1518 }
1519 }
1520 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1521
97c4965d 1522 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1523
1524 /* fill urb with data and submit */
1525 usb_fill_bulk_urb(urb,
1526 serial->dev,
1527 usb_sndbulkpipe(serial->dev,
1528 port->bulk_out_endpointAddress),
1529 urb->transfer_buffer,
1530 transfer_size,
1531 mos7840_bulk_out_data_callback, mos7840_port);
1532
1533 data1 = urb->transfer_buffer;
1534 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress);
1535
1536 /* send it down the pipe */
1537 status = usb_submit_urb(urb, GFP_ATOMIC);
1538
1539 if (status) {
0de9a702 1540 mos7840_port->busy[i] = 0;
194343d9
GKH		 1541 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1542 "with status = %d\n", __func__, status);
3f542974
PS		 1543 bytes_sent = status;
1544 goto exit;
1545 }
1546 bytes_sent = transfer_size;
1547 mos7840_port->icount.tx += transfer_size;
0de9a702 1548 smp_wmb();
3f542974 1549 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
95da310e 1550exit:
3f542974
PS		 1551 return bytes_sent;
1552
1553}
1554
1555/*****************************************************************************
1556 * mos7840_throttle
1557 * this function is called by the tty driver when it wants to stop the data
1558 * being read from the port.
1559 *****************************************************************************/
1560
95da310e 1561static void mos7840_throttle(struct tty_struct *tty)
3f542974 1562{
95da310e 1563 struct usb_serial_port *port = tty->driver_data;
3f542974 1564 struct moschip_port *mos7840_port;
3f542974
PS		 1565 int status;
1566
441b62c1 1567 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1568 dbg("%s", "Invalid port \n");
1569 return;
1570 }
1571
1572 dbg("- port %d\n", port->number);
1573
1574 mos7840_port = mos7840_get_port_private(port);
1575
1576 if (mos7840_port == NULL)
1577 return;
1578
1579 if (!mos7840_port->open) {
1580 dbg("%s\n", "port not opened");
1581 return;
1582 }
1583
1584 dbg("%s", "Entering .......... \n");
1585
3f542974
PS		 1586 /* if we are implementing XON/XOFF, send the stop character */
1587 if (I_IXOFF(tty)) {
1588 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1589 status = mos7840_write(tty, port, &stop_char, 1);
1590 if (status <= 0)
3f542974 1591 return;
3f542974 1592 }
3f542974
PS		 1593 /* if we are implementing RTS/CTS, toggle that line */
1594 if (tty->termios->c_cflag & CRTSCTS) {
1595 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1596 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1597 mos7840_port->shadowMCR);
95da310e 1598 if (status < 0)
3f542974 1599 return;
3f542974
PS		 1600 }
1601
1602 return;
1603}
1604
1605/*****************************************************************************
1606 * mos7840_unthrottle
880af9db
AC		 1607 * this function is called by the tty driver when it wants to resume
1608 * the data being read from the port (called after mos7840_throttle is
1609 * called)
3f542974 1610 *****************************************************************************/
95da310e 1611static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1612{
95da310e 1613 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1614 int status;
1615 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1616
441b62c1 1617 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1618 dbg("%s", "Invalid port \n");
1619 return;
1620 }
1621
1622 if (mos7840_port == NULL)
1623 return;
1624
1625 if (!mos7840_port->open) {
441b62c1 1626 dbg("%s - port not opened", __func__);
3f542974
PS		 1627 return;
1628 }
1629
1630 dbg("%s", "Entering .......... \n");
1631
3f542974
PS		 1632 /* if we are implementing XON/XOFF, send the start character */
1633 if (I_IXOFF(tty)) {
1634 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1635 status = mos7840_write(tty, port, &start_char, 1);
1636 if (status <= 0)
3f542974 1637 return;
3f542974
PS		 1638 }
1639
1640 /* if we are implementing RTS/CTS, toggle that line */
1641 if (tty->termios->c_cflag & CRTSCTS) {
1642 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1643 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1644 mos7840_port->shadowMCR);
95da310e 1645 if (status < 0)
3f542974 1646 return;
3f542974 1647 }
3f542974
PS		 1648}
1649
95da310e 1650static int mos7840_tiocmget(struct tty_struct *tty, struct file *file)
3f542974 1651{
95da310e 1652 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1653 struct moschip_port *mos7840_port;
1654 unsigned int result;
1655 __u16 msr;
1656 __u16 mcr;
880af9db 1657 int status;
3f542974
PS		 1658 mos7840_port = mos7840_get_port_private(port);
1659
441b62c1 1660 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1661
1662 if (mos7840_port == NULL)
1663 return -ENODEV;
1664
1665 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1666 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1667 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1668 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1669 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1670 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1671 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1672 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1673 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1674
441b62c1 1675 dbg("%s - 0x%04X", __func__, result);
3f542974
PS		 1676
1677 return result;
1678}
1679
95da310e 1680static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
3f542974
PS		 1681 unsigned int set, unsigned int clear)
1682{
95da310e 1683 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1684 struct moschip_port *mos7840_port;
1685 unsigned int mcr;
87521c46 1686 int status;
3f542974 1687
441b62c1 1688 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1689
1690 mos7840_port = mos7840_get_port_private(port);
1691
1692 if (mos7840_port == NULL)
1693 return -ENODEV;
1694
e2984494 1695 /* FIXME: What locks the port registers ? */
3f542974
PS		 1696 mcr = mos7840_port->shadowMCR;
1697 if (clear & TIOCM_RTS)
1698 mcr &= ~MCR_RTS;
1699 if (clear & TIOCM_DTR)
1700 mcr &= ~MCR_DTR;
1701 if (clear & TIOCM_LOOP)
1702 mcr &= ~MCR_LOOPBACK;
1703
1704 if (set & TIOCM_RTS)
1705 mcr |= MCR_RTS;
1706 if (set & TIOCM_DTR)
1707 mcr |= MCR_DTR;
1708 if (set & TIOCM_LOOP)
1709 mcr |= MCR_LOOPBACK;
1710
1711 mos7840_port->shadowMCR = mcr;
1712
3f542974
PS		 1713 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1714 if (status < 0) {
1715 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
87521c46 1716 return status;
3f542974
PS		 1717 }
1718
1719 return 0;
1720}
1721
1722/*****************************************************************************
1723 * mos7840_calc_baud_rate_divisor
1724 * this function calculates the proper baud rate divisor for the specified
1725 * baud rate.
1726 *****************************************************************************/
1727static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
880af9db 1728 __u16 *clk_sel_val)
3f542974
PS		 1729{
1730
441b62c1 1731 dbg("%s - %d", __func__, baudRate);
3f542974
PS		 1732
1733 if (baudRate <= 115200) {
1734 *divisor = 115200 / baudRate;
1735 *clk_sel_val = 0x0;
1736 }
1737 if ((baudRate > 115200) && (baudRate <= 230400)) {
1738 *divisor = 230400 / baudRate;
1739 *clk_sel_val = 0x10;
1740 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1741 *divisor = 403200 / baudRate;
1742 *clk_sel_val = 0x20;
1743 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1744 *divisor = 460800 / baudRate;
1745 *clk_sel_val = 0x30;
1746 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1747 *divisor = 806400 / baudRate;
1748 *clk_sel_val = 0x40;
1749 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1750 *divisor = 921600 / baudRate;
1751 *clk_sel_val = 0x50;
1752 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1753 *divisor = 1572864 / baudRate;
1754 *clk_sel_val = 0x60;
1755 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1756 *divisor = 3145728 / baudRate;
1757 *clk_sel_val = 0x70;
1758 }
1759 return 0;
1760
1761#ifdef NOTMCS7840
1762
1763 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1764 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1765 *divisor = mos7840_divisor_table[i].Divisor;
1766 return 0;
1767 }
1768 }
1769
1770 /* After trying for all the standard baud rates *
1771 * Try calculating the divisor for this baud rate */
1772
1773 if (baudrate > 75 && baudrate < 230400) {
1774 /* get the divisor */
1775 custom = (__u16) (230400L / baudrate);
1776
1777 /* Check for round off */
1778 round1 = (__u16) (2304000L / baudrate);
1779 round = (__u16) (round1 - (custom * 10));
880af9db 1780 if (round > 4)
3f542974 1781 custom++;
3f542974
PS		 1782 *divisor = custom;
1783
1784 dbg(" Baud %d = %d\n", baudrate, custom);
1785 return 0;
1786 }
1787
1788 dbg("%s\n", " Baud calculation Failed...");
1789 return -1;
1790#endif
1791}
1792
1793/*****************************************************************************
1794 * mos7840_send_cmd_write_baud_rate
1795 * this function sends the proper command to change the baud rate of the
1796 * specified port.
1797 *****************************************************************************/
1798
1799static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1800 int baudRate)
1801{
1802 int divisor = 0;
1803 int status;
1804 __u16 Data;
1805 unsigned char number;
1806 __u16 clk_sel_val;
1807 struct usb_serial_port *port;
1808
1809 if (mos7840_port == NULL)
1810 return -1;
1811
1812 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 1813 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1814 dbg("%s", "Invalid port \n");
1815 return -1;
1816 }
1817
441b62c1 1818 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
3f542974
PS		 1819 dbg("%s", "Invalid Serial \n");
1820 return -1;
1821 }
1822
1823 dbg("%s", "Entering .......... \n");
1824
1825 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1826
441b62c1 1827 dbg("%s - port = %d, baud = %d", __func__,
3f542974 1828 mos7840_port->port->number, baudRate);
880af9db 1829 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1830 if (baudRate > 115200) {
1831#ifdef HW_flow_control
880af9db
AC		 1832 /* NOTE: need to see the pther register to modify */
1833 /* setting h/w flow control bit to 1 */
3f542974
PS		 1834 Data = 0x2b;
1835 mos7840_port->shadowMCR = Data;
880af9db
AC		 1836 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1837 Data);
3f542974
PS		 1838 if (status < 0) {
1839 dbg("Writing spreg failed in set_serial_baud\n");
1840 return -1;
1841 }
1842#endif
1843
1844 } else {
1845#ifdef HW_flow_control
880af9db 1846 / *setting h/w flow control bit to 0 */
3f542974
PS		 1847 Data = 0xb;
1848 mos7840_port->shadowMCR = Data;
880af9db
AC		 1849 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1850 Data);
3f542974
PS		 1851 if (status < 0) {
1852 dbg("Writing spreg failed in set_serial_baud\n");
1853 return -1;
1854 }
1855#endif
1856
1857 }
1858
880af9db 1859 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1860 clk_sel_val = 0x0;
1861 Data = 0x0;
880af9db 1862 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
3f542974 1863 &clk_sel_val);
880af9db
AC		 1864 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1865 &Data);
3f542974
PS		 1866 if (status < 0) {
1867 dbg("reading spreg failed in set_serial_baud\n");
1868 return -1;
1869 }
1870 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1871 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1872 Data);
3f542974
PS		 1873 if (status < 0) {
1874 dbg("Writing spreg failed in set_serial_baud\n");
1875 return -1;
1876 }
1877 /* Calculate the Divisor */
1878
1879 if (status) {
194343d9 1880 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1881 return status;
1882 }
1883 /* Enable access to divisor latch */
1884 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1885 mos7840_port->shadowLCR = Data;
1886 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1887
1888 /* Write the divisor */
1889 Data = (unsigned char)(divisor & 0xff);
1890 dbg("set_serial_baud Value to write DLL is %x\n", Data);
1891 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1892
1893 Data = (unsigned char)((divisor & 0xff00) >> 8);
1894 dbg("set_serial_baud Value to write DLM is %x\n", Data);
1895 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1896
1897 /* Disable access to divisor latch */
1898 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1899 mos7840_port->shadowLCR = Data;
1900 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1901
1902 }
3f542974
PS		 1903 return status;
1904}
1905
1906/*****************************************************************************
1907 * mos7840_change_port_settings
1908 * This routine is called to set the UART on the device to match
1909 * the specified new settings.
1910 *****************************************************************************/
1911
95da310e
AC		 1912static void mos7840_change_port_settings(struct tty_struct *tty,
1913 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1914{
3f542974
PS		 1915 int baud;
1916 unsigned cflag;
1917 unsigned iflag;
1918 __u8 lData;
1919 __u8 lParity;
1920 __u8 lStop;
1921 int status;
1922 __u16 Data;
1923 struct usb_serial_port *port;
1924 struct usb_serial *serial;
1925
1926 if (mos7840_port == NULL)
1927 return;
1928
1929 port = (struct usb_serial_port *)mos7840_port->port;
1930
441b62c1 1931 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1932 dbg("%s", "Invalid port \n");
1933 return;
1934 }
1935
441b62c1 1936 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
3f542974
PS		 1937 dbg("%s", "Invalid Serial \n");
1938 return;
1939 }
1940
1941 serial = port->serial;
1942
441b62c1 1943 dbg("%s - port %d", __func__, mos7840_port->port->number);
3f542974
PS		 1944
1945 if (!mos7840_port->open) {
441b62c1 1946 dbg("%s - port not opened", __func__);
3f542974
PS		 1947 return;
1948 }
1949
3f542974
PS		 1950 dbg("%s", "Entering .......... \n");
1951
1952 lData = LCR_BITS_8;
1953 lStop = LCR_STOP_1;
1954 lParity = LCR_PAR_NONE;
1955
1956 cflag = tty->termios->c_cflag;
1957 iflag = tty->termios->c_iflag;
1958
1959 /* Change the number of bits */
1960 if (cflag & CSIZE) {
1961 switch (cflag & CSIZE) {
1962 case CS5:
1963 lData = LCR_BITS_5;
1964 break;
1965
1966 case CS6:
1967 lData = LCR_BITS_6;
1968 break;
1969
1970 case CS7:
1971 lData = LCR_BITS_7;
1972 break;
1973 default:
1974 case CS8:
1975 lData = LCR_BITS_8;
1976 break;
1977 }
1978 }
1979 /* Change the Parity bit */
1980 if (cflag & PARENB) {
1981 if (cflag & PARODD) {
1982 lParity = LCR_PAR_ODD;
441b62c1 1983 dbg("%s - parity = odd", __func__);
3f542974
PS		 1984 } else {
1985 lParity = LCR_PAR_EVEN;
441b62c1 1986 dbg("%s - parity = even", __func__);
3f542974
PS		 1987 }
1988
1989 } else {
441b62c1 1990 dbg("%s - parity = none", __func__);
3f542974
PS		 1991 }
1992
880af9db 1993 if (cflag & CMSPAR)
3f542974 1994 lParity = lParity | 0x20;
3f542974
PS		 1995
1996 /* Change the Stop bit */
1997 if (cflag & CSTOPB) {
1998 lStop = LCR_STOP_2;
441b62c1 1999 dbg("%s - stop bits = 2", __func__);
3f542974
PS		 2000 } else {
2001 lStop = LCR_STOP_1;
441b62c1 2002 dbg("%s - stop bits = 1", __func__);
3f542974
PS		 2003 }
2004
2005 /* Update the LCR with the correct value */
2006 mos7840_port->shadowLCR &=
2007 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2008 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2009
2010 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
2011 mos7840_port->shadowLCR);
2012 /* Disable Interrupts */
2013 Data = 0x00;
2014 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2015
2016 Data = 0x00;
2017 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2018
2019 Data = 0xcf;
2020 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2021
2022 /* Send the updated LCR value to the mos7840 */
2023 Data = mos7840_port->shadowLCR;
2024
2025 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2026
2027 Data = 0x00b;
2028 mos7840_port->shadowMCR = Data;
2029 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2030 Data = 0x00b;
2031 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2032
2033 /* set up the MCR register and send it to the mos7840 */
2034
2035 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 2036 if (cflag & CBAUD)
3f542974 2037 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 2038
880af9db 2039 if (cflag & CRTSCTS)
3f542974 2040 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 2041 else
3f542974 2042 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 2043
2044 Data = mos7840_port->shadowMCR;
2045 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2046
2047 /* Determine divisor based on baud rate */
2048 baud = tty_get_baud_rate(tty);
2049
2050 if (!baud) {
2051 /* pick a default, any default... */
2052 dbg("%s\n", "Picked default baud...");
2053 baud = 9600;
2054 }
2055
441b62c1 2056 dbg("%s - baud rate = %d", __func__, baud);
3f542974
PS		 2057 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2058
2059 /* Enable Interrupts */
2060 Data = 0x0c;
2061 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2062
50de36f7 2063 if (mos7840_port->read_urb_busy == false) {
3f542974 2064 mos7840_port->read_urb->dev = serial->dev;
50de36f7 2065 mos7840_port->read_urb_busy = true;
3f542974 2066 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
3f542974 2067 if (status) {
50de36f7 2068 dbg("usb_submit_urb(read bulk) failed, status = %d",
3f542974 2069 status);
50de36f7 2070 mos7840_port->read_urb_busy = false;
3f542974
PS		 2071 }
2072 }
2073 wake_up(&mos7840_port->delta_msr_wait);
2074 mos7840_port->delta_msr_cond = 1;
2075 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
2076 mos7840_port->shadowLCR);
2077
2078 return;
2079}
2080
2081/*****************************************************************************
2082 * mos7840_set_termios
2083 * this function is called by the tty driver when it wants to change
2084 * the termios structure
2085 *****************************************************************************/
2086
95da310e
AC		 2087static void mos7840_set_termios(struct tty_struct *tty,
2088 struct usb_serial_port *port,
606d099c 2089 struct ktermios *old_termios)
3f542974
PS		 2090{
2091 int status;
2092 unsigned int cflag;
2093 struct usb_serial *serial;
2094 struct moschip_port *mos7840_port;
3f542974 2095 dbg("mos7840_set_termios: START\n");
441b62c1 2096 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2097 dbg("%s", "Invalid port \n");
2098 return;
2099 }
2100
2101 serial = port->serial;
2102
441b62c1 2103 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 2104 dbg("%s", "Invalid Serial \n");
2105 return;
2106 }
2107
2108 mos7840_port = mos7840_get_port_private(port);
2109
2110 if (mos7840_port == NULL)
2111 return;
2112
3f542974 2113 if (!mos7840_port->open) {
441b62c1 2114 dbg("%s - port not opened", __func__);
3f542974
PS		 2115 return;
2116 }
2117
2118 dbg("%s\n", "setting termios - ");
2119
2120 cflag = tty->termios->c_cflag;
2121
441b62c1 2122 dbg("%s - clfag %08x iflag %08x", __func__,
3f542974 2123 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
441b62c1 2124 dbg("%s - old clfag %08x old iflag %08x", __func__,
3d3ddce5 2125 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
441b62c1 2126 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 2127
2128 /* change the port settings to the new ones specified */
2129
95da310e 2130 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2131
2132 if (!mos7840_port->read_urb) {
2133 dbg("%s", "URB KILLED !!!!!\n");
2134 return;
2135 }
2136
50de36f7 2137 if (mos7840_port->read_urb_busy == false) {
3f542974 2138 mos7840_port->read_urb->dev = serial->dev;
50de36f7 2139 mos7840_port->read_urb_busy = true;
3f542974
PS		 2140 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2141 if (status) {
50de36f7 2142 dbg("usb_submit_urb(read bulk) failed, status = %d",
3f542974 2143 status);
50de36f7 2144 mos7840_port->read_urb_busy = false;
3f542974
PS		 2145 }
2146 }
2147 return;
2148}
2149
2150/*****************************************************************************
2151 * mos7840_get_lsr_info - get line status register info
2152 *
2153 * Purpose: Let user call ioctl() to get info when the UART physically
2154 * is emptied. On bus types like RS485, the transmitter must
2155 * release the bus after transmitting. This must be done when
2156 * the transmit shift register is empty, not be done when the
2157 * transmit holding register is empty. This functionality
2158 * allows an RS485 driver to be written in user space.
2159 *****************************************************************************/
2160
95da310e 2161static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2162 unsigned int __user *value)
3f542974
PS		 2163{
2164 int count;
2165 unsigned int result = 0;
2166
95da310e 2167 count = mos7840_chars_in_buffer(tty);
3f542974 2168 if (count == 0) {
441b62c1 2169 dbg("%s -- Empty", __func__);
3f542974
PS		 2170 result = TIOCSER_TEMT;
2171 }
2172
2173 if (copy_to_user(value, &result, sizeof(int)))
2174 return -EFAULT;
2175 return 0;
2176}
2177
3f542974
PS		 2178/*****************************************************************************
2179 * mos7840_set_modem_info
2180 * function to set modem info
2181 *****************************************************************************/
2182
95da310e
AC		 2183/* FIXME: Should be using the model control hooks */
2184
3f542974 2185static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
97c4965d 2186 unsigned int cmd, unsigned int __user *value)
3f542974
PS		 2187{
2188 unsigned int mcr;
2189 unsigned int arg;
2190 __u16 Data;
2191 int status;
2192 struct usb_serial_port *port;
2193
2194 if (mos7840_port == NULL)
2195 return -1;
2196
2197 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 2198 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2199 dbg("%s", "Invalid port \n");
2200 return -1;
2201 }
2202
2203 mcr = mos7840_port->shadowMCR;
2204
2205 if (copy_from_user(&arg, value, sizeof(int)))
2206 return -EFAULT;
2207
2208 switch (cmd) {
2209 case TIOCMBIS:
2210 if (arg & TIOCM_RTS)
2211 mcr |= MCR_RTS;
2212 if (arg & TIOCM_DTR)
2213 mcr |= MCR_RTS;
2214 if (arg & TIOCM_LOOP)
2215 mcr |= MCR_LOOPBACK;
2216 break;
2217
2218 case TIOCMBIC:
2219 if (arg & TIOCM_RTS)
2220 mcr &= ~MCR_RTS;
2221 if (arg & TIOCM_DTR)
2222 mcr &= ~MCR_RTS;
2223 if (arg & TIOCM_LOOP)
2224 mcr &= ~MCR_LOOPBACK;
2225 break;
2226
2227 case TIOCMSET:
2228 /* turn off the RTS and DTR and LOOPBACK
2229 * and then only turn on what was asked to */
2230 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK);
2231 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0);
2232 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0);
2233 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0);
2234 break;
2235 }
2236
6b447f04 2237 lock_kernel();
3f542974
PS		 2238 mos7840_port->shadowMCR = mcr;
2239
2240 Data = mos7840_port->shadowMCR;
3f542974 2241 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
6b447f04 2242 unlock_kernel();
3f542974
PS		 2243 if (status < 0) {
2244 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
2245 return -1;
2246 }
2247
2248 return 0;
2249}
2250
2251/*****************************************************************************
2252 * mos7840_get_modem_info
2253 * function to get modem info
2254 *****************************************************************************/
2255
2256static int mos7840_get_modem_info(struct moschip_port *mos7840_port,
97c4965d 2257 unsigned int __user *value)
3f542974
PS		 2258{
2259 unsigned int result = 0;
2260 __u16 msr;
2261 unsigned int mcr = mos7840_port->shadowMCR;
880af9db 2262 mos7840_get_uart_reg(mos7840_port->port,
95da310e 2263 MODEM_STATUS_REGISTER, &msr);
3f542974
PS		 2264 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
2265 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
2266 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
2267 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */
2268 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
2269 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
2270
441b62c1 2271 dbg("%s -- %x", __func__, result);
3f542974
PS		 2272
2273 if (copy_to_user(value, &result, sizeof(int)))
2274 return -EFAULT;
2275 return 0;
2276}
2277
2278/*****************************************************************************
2279 * mos7840_get_serial_info
2280 * function to get information about serial port
2281 *****************************************************************************/
2282
2283static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2284 struct serial_struct __user *retinfo)
3f542974
PS		 2285{
2286 struct serial_struct tmp;
2287
2288 if (mos7840_port == NULL)
2289 return -1;
2290
2291 if (!retinfo)
2292 return -EFAULT;
2293
2294 memset(&tmp, 0, sizeof(tmp));
2295
2296 tmp.type = PORT_16550A;
2297 tmp.line = mos7840_port->port->serial->minor;
2298 tmp.port = mos7840_port->port->number;
2299 tmp.irq = 0;
2300 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2301 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2302 tmp.baud_base = 9600;
2303 tmp.close_delay = 5 * HZ;
2304 tmp.closing_wait = 30 * HZ;
2305
2306 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2307 return -EFAULT;
2308 return 0;
2309}
2310
2311/*****************************************************************************
2312 * SerialIoctl
2313 * this function handles any ioctl calls to the driver
2314 *****************************************************************************/
2315
95da310e 2316static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
3f542974
PS		 2317 unsigned int cmd, unsigned long arg)
2318{
95da310e 2319 struct usb_serial_port *port = tty->driver_data;
97c4965d 2320 void __user *argp = (void __user *)arg;
3f542974 2321 struct moschip_port *mos7840_port;
3f542974
PS		 2322
2323 struct async_icount cnow;
2324 struct async_icount cprev;
2325 struct serial_icounter_struct icount;
2326 int mosret = 0;
3f542974 2327
441b62c1 2328 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2329 dbg("%s", "Invalid port \n");
2330 return -1;
2331 }
2332
2333 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2334
2335 if (mos7840_port == NULL)
2336 return -1;
2337
441b62c1 2338 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
3f542974
PS		 2339
2340 switch (cmd) {
2341 /* return number of bytes available */
2342
3f542974 2343 case TIOCSERGETLSR:
441b62c1 2344 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
95da310e 2345 return mos7840_get_lsr_info(tty, argp);
3f542974
PS		 2346 return 0;
2347
95da310e 2348 /* FIXME: use the modem hooks and remove this */
3f542974
PS		 2349 case TIOCMBIS:
2350 case TIOCMBIC:
2351 case TIOCMSET:
441b62c1 2352 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__,
3f542974
PS		 2353 port->number);
2354 mosret =
97c4965d 2355 mos7840_set_modem_info(mos7840_port, cmd, argp);
3f542974
PS		 2356 return mosret;
2357
2358 case TIOCMGET:
441b62c1 2359 dbg("%s (%d) TIOCMGET", __func__, port->number);
97c4965d 2360 return mos7840_get_modem_info(mos7840_port, argp);
3f542974
PS		 2361
2362 case TIOCGSERIAL:
441b62c1 2363 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
97c4965d 2364 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2365
2366 case TIOCSSERIAL:
441b62c1 2367 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
3f542974
PS		 2368 break;
2369
2370 case TIOCMIWAIT:
441b62c1 2371 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
3f542974
PS		 2372 cprev = mos7840_port->icount;
2373 while (1) {
880af9db 2374 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974
PS		 2375 mos7840_port->delta_msr_cond = 0;
2376 wait_event_interruptible(mos7840_port->delta_msr_wait,
2377 (mos7840_port->
2378 delta_msr_cond == 1));
2379
2380 /* see if a signal did it */
2381 if (signal_pending(current))
2382 return -ERESTARTSYS;
2383 cnow = mos7840_port->icount;
0de9a702 2384 smp_rmb();
3f542974
PS		 2385 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2386 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2387 return -EIO; /* no change => error */
2388 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2389 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2390 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2391 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2392 return 0;
2393 }
2394 cprev = cnow;
2395 }
2396 /* NOTREACHED */
2397 break;
2398
2399 case TIOCGICOUNT:
2400 cnow = mos7840_port->icount;
0de9a702 2401 smp_rmb();
3f542974
PS		 2402 icount.cts = cnow.cts;
2403 icount.dsr = cnow.dsr;
2404 icount.rng = cnow.rng;
2405 icount.dcd = cnow.dcd;
2406 icount.rx = cnow.rx;
2407 icount.tx = cnow.tx;
2408 icount.frame = cnow.frame;
2409 icount.overrun = cnow.overrun;
2410 icount.parity = cnow.parity;
2411 icount.brk = cnow.brk;
2412 icount.buf_overrun = cnow.buf_overrun;
2413
441b62c1 2414 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
3f542974 2415 port->number, icount.rx, icount.tx);
97c4965d 2416 if (copy_to_user(argp, &icount, sizeof(icount)))
3f542974
PS		 2417 return -EFAULT;
2418 return 0;
3f542974
PS		 2419 default:
2420 break;
2421 }
3f542974
PS		 2422 return -ENOIOCTLCMD;
2423}
2424
2425static int mos7840_calc_num_ports(struct usb_serial *serial)
2426{
0de9a702 2427 int mos7840_num_ports = 0;
3f542974
PS		 2428
2429 dbg("numberofendpoints: %d \n",
2430 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
2431 dbg("numberofendpoints: %d \n",
2432 (int)serial->interface->altsetting->desc.bNumEndpoints);
2433 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
0de9a702 2434 mos7840_num_ports = serial->num_ports = 2;
3f542974 2435 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
0de9a702
ON		 2436 serial->num_bulk_in = 4;
2437 serial->num_bulk_out = 4;
2438 mos7840_num_ports = serial->num_ports = 4;
3f542974
PS		 2439 }
2440
2441 return mos7840_num_ports;
2442}
2443
2444/****************************************************************************
2445 * mos7840_startup
2446 ****************************************************************************/
2447
2448static int mos7840_startup(struct usb_serial *serial)
2449{
2450 struct moschip_port *mos7840_port;
2451 struct usb_device *dev;
2452 int i, status;
2453
2454 __u16 Data;
2455 dbg("%s \n", " mos7840_startup :entering..........");
2456
2457 if (!serial) {
2458 dbg("%s\n", "Invalid Handler");
2459 return -1;
2460 }
2461
2462 dev = serial->dev;
2463
2464 dbg("%s\n", "Entering...");
2465
2466 /* we set up the pointers to the endpoints in the mos7840_open *
2467 * function, as the structures aren't created yet. */
2468
2469 /* set up port private structures */
2470 for (i = 0; i < serial->num_ports; ++i) {
7ac9da10 2471 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
3f542974 2472 if (mos7840_port == NULL) {
194343d9 2473 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
0de9a702
ON		 2474 status = -ENOMEM;
2475 i--; /* don't follow NULL pointer cleaning up */
2476 goto error;
3f542974 2477 }
3f542974 2478
880af9db
AC		 2479 /* Initialize all port interrupt end point to port 0 int
2480 * endpoint. Our device has only one interrupt end point
2481 * common to all port */
3f542974
PS		 2482
2483 mos7840_port->port = serial->port[i];
2484 mos7840_set_port_private(serial->port[i], mos7840_port);
0de9a702 2485 spin_lock_init(&mos7840_port->pool_lock);
3f542974
PS		 2486
2487 mos7840_port->port_num = ((serial->port[i]->number -
2488 (serial->port[i]->serial->minor)) +
2489 1);
2490
2491 if (mos7840_port->port_num == 1) {
2492 mos7840_port->SpRegOffset = 0x0;
2493 mos7840_port->ControlRegOffset = 0x1;
2494 mos7840_port->DcrRegOffset = 0x4;
2495 } else if ((mos7840_port->port_num == 2)
0de9a702 2496 && (serial->num_ports == 4)) {
3f542974
PS		 2497 mos7840_port->SpRegOffset = 0x8;
2498 mos7840_port->ControlRegOffset = 0x9;
2499 mos7840_port->DcrRegOffset = 0x16;
2500 } else if ((mos7840_port->port_num == 2)
0de9a702 2501 && (serial->num_ports == 2)) {
3f542974
PS		 2502 mos7840_port->SpRegOffset = 0xa;
2503 mos7840_port->ControlRegOffset = 0xb;
2504 mos7840_port->DcrRegOffset = 0x19;
2505 } else if ((mos7840_port->port_num == 3)
0de9a702 2506 && (serial->num_ports == 4)) {
3f542974
PS		 2507 mos7840_port->SpRegOffset = 0xa;
2508 mos7840_port->ControlRegOffset = 0xb;
2509 mos7840_port->DcrRegOffset = 0x19;
2510 } else if ((mos7840_port->port_num == 4)
0de9a702 2511 && (serial->num_ports == 4)) {
3f542974
PS		 2512 mos7840_port->SpRegOffset = 0xc;
2513 mos7840_port->ControlRegOffset = 0xd;
2514 mos7840_port->DcrRegOffset = 0x1c;
2515 }
2516 mos7840_dump_serial_port(mos7840_port);
3f542974
PS		 2517 mos7840_set_port_private(serial->port[i], mos7840_port);
2518
880af9db
AC		 2519 /* enable rx_disable bit in control register */
2520 status = mos7840_get_reg_sync(serial->port[i],
2521 mos7840_port->ControlRegOffset, &Data);
3f542974
PS		 2522 if (status < 0) {
2523 dbg("Reading ControlReg failed status-0x%x\n", status);
2524 break;
2525 } else
2526 dbg("ControlReg Reading success val is %x, status%d\n",
2527 Data, status);
880af9db
AC		 2528 Data |= 0x08; /* setting driver done bit */
2529 Data |= 0x04; /* sp1_bit to have cts change reflect in
2530 modem status reg */
3f542974 2531
880af9db
AC		 2532 /* Data |= 0x20; //rx_disable bit */
2533 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2534 mos7840_port->ControlRegOffset, Data);
2535 if (status < 0) {
2536 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2537 break;
2538 } else
2539 dbg("ControlReg Writing success(rx_disable) status%d\n",
2540 status);
2541
880af9db
AC		 2542 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2543 and 0x24 in DCR3 */
3f542974 2544 Data = 0x01;
880af9db
AC		 2545 status = mos7840_set_reg_sync(serial->port[i],
2546 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
3f542974
PS		 2547 if (status < 0) {
2548 dbg("Writing DCR0 failed status-0x%x\n", status);
2549 break;
2550 } else
2551 dbg("DCR0 Writing success status%d\n", status);
2552
2553 Data = 0x05;
880af9db
AC		 2554 status = mos7840_set_reg_sync(serial->port[i],
2555 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
3f542974
PS		 2556 if (status < 0) {
2557 dbg("Writing DCR1 failed status-0x%x\n", status);
2558 break;
2559 } else
2560 dbg("DCR1 Writing success status%d\n", status);
2561
2562 Data = 0x24;
880af9db
AC		 2563 status = mos7840_set_reg_sync(serial->port[i],
2564 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
3f542974
PS		 2565 if (status < 0) {
2566 dbg("Writing DCR2 failed status-0x%x\n", status);
2567 break;
2568 } else
2569 dbg("DCR2 Writing success status%d\n", status);
2570
880af9db 2571 /* write values in clkstart0x0 and clkmulti 0x20 */
3f542974 2572 Data = 0x0;
880af9db 2573 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2574 CLK_START_VALUE_REGISTER, Data);
2575 if (status < 0) {
2576 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2577 break;
2578 } else
2579 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2580
2581 Data = 0x20;
880af9db
AC		 2582 status = mos7840_set_reg_sync(serial->port[i],
2583 CLK_MULTI_REGISTER, Data);
3f542974
PS		 2584 if (status < 0) {
2585 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
2586 status);
0de9a702 2587 goto error;
3f542974
PS		 2588 } else
2589 dbg("CLK_MULTI_REGISTER Writing success status%d\n",
2590 status);
2591
880af9db 2592 /* write value 0x0 to scratchpad register */
3f542974 2593 Data = 0x00;
880af9db
AC		 2594 status = mos7840_set_uart_reg(serial->port[i],
2595 SCRATCH_PAD_REGISTER, Data);
3f542974
PS		 2596 if (status < 0) {
2597 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
2598 status);
2599 break;
2600 } else
2601 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
2602 status);
2603
880af9db 2604 /* Zero Length flag register */
3f542974 2605 if ((mos7840_port->port_num != 1)
0de9a702 2606 && (serial->num_ports == 2)) {
3f542974
PS		 2607
2608 Data = 0xff;
3f542974 2609 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2610 (__u16) (ZLP_REG1 +
2611 ((__u16)mos7840_port->port_num)), Data);
3f542974
PS		 2612 dbg("ZLIP offset%x\n",
2613 (__u16) (ZLP_REG1 +
880af9db 2614 ((__u16) mos7840_port->port_num)));
3f542974
PS		 2615 if (status < 0) {
2616 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2617 i + 2, status);
2618 break;
2619 } else
2620 dbg("ZLP_REG%d Writing success status%d\n",
2621 i + 2, status);
2622 } else {
2623 Data = 0xff;
3f542974 2624 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2625 (__u16) (ZLP_REG1 +
2626 ((__u16)mos7840_port->port_num) - 0x1), Data);
3f542974
PS		 2627 dbg("ZLIP offset%x\n",
2628 (__u16) (ZLP_REG1 +
2629 ((__u16) mos7840_port->port_num) - 0x1));
2630 if (status < 0) {
2631 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2632 i + 1, status);
2633 break;
2634 } else
2635 dbg("ZLP_REG%d Writing success status%d\n",
2636 i + 1, status);
2637
2638 }
0de9a702 2639 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974 2640 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
880af9db
AC		 2641 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2642 GFP_KERNEL);
2643 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2644 !mos7840_port->dr) {
0de9a702
ON		 2645 status = -ENOMEM;
2646 goto error;
2647 }
3f542974
PS		 2648 }
2649
880af9db 2650 /* Zero Length flag enable */
3f542974 2651 Data = 0x0f;
3f542974
PS		 2652 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2653 if (status < 0) {
2654 dbg("Writing ZLP_REG5 failed status-0x%x\n", status);
7ced46c3 2655 goto error;
3f542974
PS		 2656 } else
2657 dbg("ZLP_REG5 Writing success status%d\n", status);
2658
2659 /* setting configuration feature to one */
2660 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
97c4965d 2661 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
3f542974 2662 return 0;
0de9a702
ON		 2663error:
2664 for (/* nothing */; i >= 0; i--) {
2665 mos7840_port = mos7840_get_port_private(serial->port[i]);
2666
2667 kfree(mos7840_port->dr);
2668 kfree(mos7840_port->ctrl_buf);
2669 usb_free_urb(mos7840_port->control_urb);
2670 kfree(mos7840_port);
2671 serial->port[i] = NULL;
2672 }
2673 return status;
3f542974
PS		 2674}
2675
2676/****************************************************************************
2677 * mos7840_shutdown
2678 * This function is called whenever the device is removed from the usb bus.
2679 ****************************************************************************/
2680
2681static void mos7840_shutdown(struct usb_serial *serial)
2682{
2683 int i;
0de9a702 2684 unsigned long flags;
3f542974
PS		 2685 struct moschip_port *mos7840_port;
2686 dbg("%s \n", " shutdown :entering..........");
2687
2688 if (!serial) {
2689 dbg("%s", "Invalid Handler \n");
2690 return;
2691 }
2692
880af9db 2693 /* check for the ports to be closed,close the ports and disconnect */
3f542974
PS		 2694
2695 /* free private structure allocated for serial port *
2696 * stop reads and writes on all ports */
2697
2698 for (i = 0; i < serial->num_ports; ++i) {
2699 mos7840_port = mos7840_get_port_private(serial->port[i]);
0de9a702
ON		 2700 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2701 mos7840_port->zombie = 1;
2702 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 2703 usb_kill_urb(mos7840_port->control_urb);
0de9a702
ON		 2704 kfree(mos7840_port->ctrl_buf);
2705 kfree(mos7840_port->dr);
3f542974
PS		 2706 kfree(mos7840_port);
2707 mos7840_set_port_private(serial->port[i], NULL);
2708 }
2709
2710 dbg("%s\n", "Thank u :: ");
2711
2712}
2713
d9b1b787
JH		 2714static struct usb_driver io_driver = {
2715 .name = "mos7840",
2716 .probe = usb_serial_probe,
2717 .disconnect = usb_serial_disconnect,
2718 .id_table = moschip_id_table_combined,
2719 .no_dynamic_id = 1,
2720};
2721
3f542974
PS		 2722static struct usb_serial_driver moschip7840_4port_device = {
2723 .driver = {
2724 .owner = THIS_MODULE,
2725 .name = "mos7840",
2726 },
2727 .description = DRIVER_DESC,
d9b1b787 2728 .usb_driver = &io_driver,
3f542974 2729 .id_table = moschip_port_id_table,
3f542974 2730 .num_ports = 4,
3f542974
PS		 2731 .open = mos7840_open,
2732 .close = mos7840_close,
2733 .write = mos7840_write,
2734 .write_room = mos7840_write_room,
2735 .chars_in_buffer = mos7840_chars_in_buffer,
2736 .throttle = mos7840_throttle,
2737 .unthrottle = mos7840_unthrottle,
2738 .calc_num_ports = mos7840_calc_num_ports,
2739#ifdef MCSSerialProbe
2740 .probe = mos7840_serial_probe,
2741#endif
2742 .ioctl = mos7840_ioctl,
2743 .set_termios = mos7840_set_termios,
2744 .break_ctl = mos7840_break,
2745 .tiocmget = mos7840_tiocmget,
2746 .tiocmset = mos7840_tiocmset,
2747 .attach = mos7840_startup,
2748 .shutdown = mos7840_shutdown,
2749 .read_bulk_callback = mos7840_bulk_in_callback,
2750 .read_int_callback = mos7840_interrupt_callback,
2751};
2752
3f542974
PS		 2753/****************************************************************************
2754 * moschip7840_init
2755 * This is called by the module subsystem, or on startup to initialize us
2756 ****************************************************************************/
2757static int __init moschip7840_init(void)
2758{
2759 int retval;
2760
2761 dbg("%s \n", " mos7840_init :entering..........");
2762
2763 /* Register with the usb serial */
2764 retval = usb_serial_register(&moschip7840_4port_device);
2765
2766 if (retval)
2767 goto failed_port_device_register;
2768
2769 dbg("%s\n", "Entring...");
c197a8db
GKH		 2770 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2771 DRIVER_DESC "\n");
3f542974
PS		 2772
2773 /* Register with the usb */
2774 retval = usb_register(&io_driver);
3f542974
PS		 2775 if (retval == 0) {
2776 dbg("%s\n", "Leaving...");
2777 return 0;
2778 }
3f542974 2779 usb_serial_deregister(&moschip7840_4port_device);
880af9db 2780failed_port_device_register:
3f542974
PS		 2781 return retval;
2782}
2783
2784/****************************************************************************
2785 * moschip7840_exit
2786 * Called when the driver is about to be unloaded.
2787 ****************************************************************************/
2788static void __exit moschip7840_exit(void)
2789{
2790
2791 dbg("%s \n", " mos7840_exit :entering..........");
2792
2793 usb_deregister(&io_driver);
2794
2795 usb_serial_deregister(&moschip7840_4port_device);
2796
2797 dbg("%s\n", "Entring...");
2798}
2799
2800module_init(moschip7840_init);
2801module_exit(moschip7840_exit);
2802
2803/* Module information */
2804MODULE_DESCRIPTION(DRIVER_DESC);
2805MODULE_LICENSE("GPL");
2806
2807module_param(debug, bool, S_IRUGO | S_IWUSR);
2808MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux kernel - Deliverables
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