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tty: Bring the usb tty port structure into more use
[GitHub/mt8127/android_kernel_alcatel_ttab.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 */
37768adf 41#define DRIVER_VERSION "1.3.2"
3f542974
PS		 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 1009
880af9db
AC		 1010 /* Check to see if we've set up our endpoint info yet *
1011 * (can't set it up in mos7840_startup as the structures *
1012 * were not set up at that time.) */
0de9a702 1013 if (port0->open_ports == 1) {
3f542974 1014 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1015 /* set up interrupt urb */
3f542974 1016 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1017 serial->dev,
1018 usb_rcvintpipe(serial->dev,
1019 serial->port[0]->interrupt_in_endpointAddress),
1020 serial->port[0]->interrupt_in_buffer,
1021 serial->port[0]->interrupt_in_urb->
1022 transfer_buffer_length,
1023 mos7840_interrupt_callback,
1024 serial,
1025 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1026
1027 /* start interrupt read for mos7840 *
1028 * will continue as long as mos7840 is connected */
1029
1030 response =
1031 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1032 GFP_KERNEL);
1033 if (response) {
194343d9
GKH		 1034 dev_err(&port->dev, "%s - Error %d submitting "
1035 "interrupt urb\n", __func__, response);
3f542974
PS		 1036 }
1037
1038 }
1039
1040 }
1041
1042 /* see if we've set up our endpoint info yet *
1043 * (can't set it up in mos7840_startup as the *
1044 * structures were not set up at that time.) */
1045
1046 dbg("port number is %d \n", port->number);
1047 dbg("serial number is %d \n", port->serial->minor);
1048 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress);
1049 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress);
1050 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress);
1051 dbg("port's number in the device is %d\n", mos7840_port->port_num);
1052 mos7840_port->read_urb = port->read_urb;
1053
1054 /* set up our bulk in urb */
1055
1056 usb_fill_bulk_urb(mos7840_port->read_urb,
1057 serial->dev,
1058 usb_rcvbulkpipe(serial->dev,
1059 port->bulk_in_endpointAddress),
1060 port->bulk_in_buffer,
1061 mos7840_port->read_urb->transfer_buffer_length,
1062 mos7840_bulk_in_callback, mos7840_port);
1063
1064 dbg("mos7840_open: bulkin endpoint is %d\n",
1065 port->bulk_in_endpointAddress);
50de36f7 1066 mos7840_port->read_urb_busy = true;
3f542974
PS		 1067 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1068 if (response) {
194343d9
GKH		 1069 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1070 __func__, response);
50de36f7 1071 mos7840_port->read_urb_busy = false;
3f542974
PS		 1072 }
1073
1074 /* initialize our wait queues */
1075 init_waitqueue_head(&mos7840_port->wait_chase);
1076 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1077
1078 /* initialize our icount structure */
1079 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1080
1081 /* initialize our port settings */
880af9db
AC		 1082 /* Must set to enable ints! */
1083 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1084 /* send a open port command */
1085 mos7840_port->open = 1;
880af9db 1086 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974
PS		 1087 mos7840_port->icount.tx = 0;
1088 mos7840_port->icount.rx = 0;
1089
880af9db
AC		 1090 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n",
1091 serial, mos7840_port, port);
3f542974
PS		 1092
1093 return 0;
1094
1095}
1096
1097/*****************************************************************************
1098 * mos7840_chars_in_buffer
1099 * this function is called by the tty driver when it wants to know how many
1100 * bytes of data we currently have outstanding in the port (data that has
1101 * been written, but hasn't made it out the port yet)
1102 * If successful, we return the number of bytes left to be written in the
1103 * system,
95da310e 1104 * Otherwise we return zero.
3f542974
PS		 1105 *****************************************************************************/
1106
95da310e 1107static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1108{
95da310e 1109 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1110 int i;
1111 int chars = 0;
0de9a702 1112 unsigned long flags;
3f542974
PS		 1113 struct moschip_port *mos7840_port;
1114
1115 dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
1116
441b62c1 1117 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974 1118 dbg("%s", "Invalid port \n");
95da310e 1119 return 0;
3f542974
PS		 1120 }
1121
1122 mos7840_port = mos7840_get_port_private(port);
1123 if (mos7840_port == NULL) {
1124 dbg("%s \n", "mos7840_break:leaving ...........");
95da310e 1125 return 0;
3f542974
PS		 1126 }
1127
880af9db 1128 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
95da310e
AC		 1129 for (i = 0; i < NUM_URBS; ++i)
1130 if (mos7840_port->busy[i])
3f542974 1131 chars += URB_TRANSFER_BUFFER_SIZE;
880af9db 1132 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
441b62c1 1133 dbg("%s - returns %d", __func__, chars);
0de9a702 1134 return chars;
3f542974
PS		 1135
1136}
1137
3f542974
PS		 1138/*****************************************************************************
1139 * mos7840_close
1140 * this function is called by the tty driver when a port is closed
1141 *****************************************************************************/
1142
335f8514 1143static void mos7840_close(struct usb_serial_port *port)
3f542974
PS		 1144{
1145 struct usb_serial *serial;
1146 struct moschip_port *mos7840_port;
0de9a702 1147 struct moschip_port *port0;
3f542974
PS		 1148 int j;
1149 __u16 Data;
1150
1151 dbg("%s\n", "mos7840_close:entering...");
1152
441b62c1 1153 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1154 dbg("%s", "Port Paranoia failed \n");
1155 return;
1156 }
1157
441b62c1 1158 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 1159 if (!serial) {
1160 dbg("%s", "Serial Paranoia failed \n");
1161 return;
1162 }
1163
1164 mos7840_port = mos7840_get_port_private(port);
0de9a702 1165 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1166
0de9a702 1167 if (mos7840_port == NULL || port0 == NULL)
3f542974 1168 return;
3f542974
PS		 1169
1170 for (j = 0; j < NUM_URBS; ++j)
1171 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1172
1173 /* Freeing Write URBs */
1174 for (j = 0; j < NUM_URBS; ++j) {
1175 if (mos7840_port->write_urb_pool[j]) {
1176 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1177 kfree(mos7840_port->write_urb_pool[j]->
1178 transfer_buffer);
1179
1180 usb_free_urb(mos7840_port->write_urb_pool[j]);
1181 }
1182 }
1183
3f542974
PS		 1184 /* While closing port, shutdown all bulk read, write *
1185 * and interrupt read if they exists */
1186 if (serial->dev) {
3f542974
PS		 1187 if (mos7840_port->write_urb) {
1188 dbg("%s", "Shutdown bulk write\n");
1189 usb_kill_urb(mos7840_port->write_urb);
1190 }
3f542974
PS		 1191 if (mos7840_port->read_urb) {
1192 dbg("%s", "Shutdown bulk read\n");
1193 usb_kill_urb(mos7840_port->read_urb);
50de36f7 1194 mos7840_port->read_urb_busy = false;
3f542974
PS		 1195 }
1196 if ((&mos7840_port->control_urb)) {
1197 dbg("%s", "Shutdown control read\n");
880af9db 1198 /*/ usb_kill_urb (mos7840_port->control_urb); */
3f542974
PS		 1199 }
1200 }
880af9db
AC		 1201/* if(mos7840_port->ctrl_buf != NULL) */
1202/* kfree(mos7840_port->ctrl_buf); */
0de9a702 1203 port0->open_ports--;
3f542974 1204 dbg("mos7840_num_open_ports in close%d:in port%d\n",
0de9a702
ON		 1205 port0->open_ports, port->number);
1206 if (port0->open_ports == 0) {
3f542974
PS		 1207 if (serial->port[0]->interrupt_in_urb) {
1208 dbg("%s", "Shutdown interrupt_in_urb\n");
0de9a702 1209 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1210 }
1211 }
1212
1213 if (mos7840_port->write_urb) {
1214 /* if this urb had a transfer buffer already (old tx) free it */
880af9db 1215 if (mos7840_port->write_urb->transfer_buffer != NULL)
3f542974 1216 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1217 usb_free_urb(mos7840_port->write_urb);
1218 }
1219
1220 Data = 0x0;
1221 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1222
1223 Data = 0x00;
1224 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1225
1226 mos7840_port->open = 0;
1227
1228 dbg("%s \n", "Leaving ............");
1229}
1230
1231/************************************************************************
1232 *
1233 * mos7840_block_until_chase_response
1234 *
1235 * This function will block the close until one of the following:
1236 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1237 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1238 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1239 *
1240 ************************************************************************/
1241
95da310e
AC		 1242static void mos7840_block_until_chase_response(struct tty_struct *tty,
1243 struct moschip_port *mos7840_port)
3f542974
PS		 1244{
1245 int timeout = 1 * HZ;
1246 int wait = 10;
1247 int count;
1248
1249 while (1) {
95da310e 1250 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1251
1252 /* Check for Buffer status */
880af9db 1253 if (count <= 0)
3f542974 1254 return;
3f542974
PS		 1255
1256 /* Block the thread for a while */
1257 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1258 timeout);
1259 /* No activity.. count down section */
1260 wait--;
1261 if (wait == 0) {
441b62c1 1262 dbg("%s - TIMEOUT", __func__);
3f542974
PS		 1263 return;
1264 } else {
dc0d5c1e 1265 /* Reset timeout value back to seconds */
3f542974
PS		 1266 wait = 10;
1267 }
1268 }
1269
1270}
1271
1272/*****************************************************************************
1273 * mos7840_break
1274 * this function sends a break to the port
1275 *****************************************************************************/
95da310e 1276static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1277{
95da310e 1278 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1279 unsigned char data;
1280 struct usb_serial *serial;
1281 struct moschip_port *mos7840_port;
1282
1283 dbg("%s \n", "Entering ...........");
1284 dbg("mos7840_break: Start\n");
1285
441b62c1 1286 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1287 dbg("%s", "Port Paranoia failed \n");
1288 return;
1289 }
1290
441b62c1 1291 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 1292 if (!serial) {
1293 dbg("%s", "Serial Paranoia failed \n");
1294 return;
1295 }
1296
1297 mos7840_port = mos7840_get_port_private(port);
1298
880af9db 1299 if (mos7840_port == NULL)
3f542974 1300 return;
3f542974 1301
95da310e 1302 if (serial->dev)
3f542974 1303 /* flush and block until tx is empty */
95da310e 1304 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1305
95da310e 1306 if (break_state == -1)
3f542974 1307 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1308 else
3f542974 1309 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974 1310
6b447f04 1311 /* FIXME: no locking on shadowLCR anywhere in driver */
3f542974
PS		 1312 mos7840_port->shadowLCR = data;
1313 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
1314 mos7840_port->shadowLCR);
1315 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1316 mos7840_port->shadowLCR);
1317
1318 return;
1319}
1320
1321/*****************************************************************************
1322 * mos7840_write_room
1323 * this function is called by the tty driver when it wants to know how many
1324 * bytes of data we can accept for a specific port.
1325 * If successful, we return the amount of room that we have for this port
1326 * Otherwise we return a negative error number.
1327 *****************************************************************************/
1328
95da310e 1329static int mos7840_write_room(struct tty_struct *tty)
3f542974 1330{
95da310e 1331 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1332 int i;
1333 int room = 0;
0de9a702 1334 unsigned long flags;
3f542974
PS		 1335 struct moschip_port *mos7840_port;
1336
1337 dbg("%s \n", " mos7840_write_room:entering ...........");
1338
441b62c1 1339 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1340 dbg("%s", "Invalid port \n");
1341 dbg("%s \n", " mos7840_write_room:leaving ...........");
1342 return -1;
1343 }
1344
1345 mos7840_port = mos7840_get_port_private(port);
1346 if (mos7840_port == NULL) {
1347 dbg("%s \n", "mos7840_break:leaving ...........");
1348 return -1;
1349 }
1350
0de9a702 1351 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1352 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1353 if (!mos7840_port->busy[i])
3f542974 1354 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1355 }
0de9a702 1356 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1357
0de9a702 1358 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
441b62c1 1359 dbg("%s - returns %d", __func__, room);
0de9a702 1360 return room;
3f542974
PS		 1361
1362}
1363
1364/*****************************************************************************
1365 * mos7840_write
1366 * this function is called by the tty driver when data should be written to
1367 * the port.
1368 * If successful, we return the number of bytes written, otherwise we
1369 * return a negative error number.
1370 *****************************************************************************/
1371
95da310e 1372static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1373 const unsigned char *data, int count)
1374{
1375 int status;
1376 int i;
1377 int bytes_sent = 0;
1378 int transfer_size;
0de9a702 1379 unsigned long flags;
3f542974
PS		 1380
1381 struct moschip_port *mos7840_port;
1382 struct usb_serial *serial;
1383 struct urb *urb;
880af9db 1384 /* __u16 Data; */
3f542974
PS		 1385 const unsigned char *current_position = data;
1386 unsigned char *data1;
1387 dbg("%s \n", "entering ...........");
880af9db
AC		 1388 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1389 mos7840_port->shadowLCR); */
3f542974
PS		 1390
1391#ifdef NOTMOS7840
1392 Data = 0x00;
3f542974
PS		 1393 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1394 mos7840_port->shadowLCR = Data;
1395 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
1396 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1397 mos7840_port->shadowLCR);
1398
880af9db
AC		 1399 /* Data = 0x03; */
1400 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1401 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1402
880af9db 1403 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1404 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1405
880af9db
AC		 1406 /* Data = 0x0c; */
1407 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1408 Data = 0x00;
3f542974
PS		 1409 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1410 dbg("mos7840_write:DLL value is %x\n", Data);
1411
1412 Data = 0x0;
3f542974
PS		 1413 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1414 dbg("mos7840_write:DLM value is %x\n", Data);
1415
1416 Data = Data & ~SERIAL_LCR_DLAB;
1417 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1418 mos7840_port->shadowLCR);
3f542974
PS		 1419 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1420#endif
1421
441b62c1 1422 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1423 dbg("%s", "Port Paranoia failed \n");
1424 return -1;
1425 }
1426
1427 serial = port->serial;
441b62c1 1428 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 1429 dbg("%s", "Serial Paranoia failed \n");
1430 return -1;
1431 }
1432
1433 mos7840_port = mos7840_get_port_private(port);
1434 if (mos7840_port == NULL) {
1435 dbg("%s", "mos7840_port is NULL\n");
1436 return -1;
1437 }
1438
1439 /* try to find a free urb in the list */
1440 urb = NULL;
1441
0de9a702 1442 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1443 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1444 if (!mos7840_port->busy[i]) {
1445 mos7840_port->busy[i] = 1;
3f542974
PS		 1446 urb = mos7840_port->write_urb_pool[i];
1447 dbg("\nURB:%d", i);
1448 break;
1449 }
1450 }
0de9a702 1451 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1452
1453 if (urb == NULL) {
441b62c1 1454 dbg("%s - no more free urbs", __func__);
3f542974
PS		 1455 goto exit;
1456 }
1457
1458 if (urb->transfer_buffer == NULL) {
1459 urb->transfer_buffer =
1460 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1461
1462 if (urb->transfer_buffer == NULL) {
194343d9
GKH		 1463 dev_err(&port->dev, "%s no more kernel memory...\n",
1464 __func__);
3f542974
PS		 1465 goto exit;
1466 }
1467 }
1468 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1469
97c4965d 1470 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1471
1472 /* fill urb with data and submit */
1473 usb_fill_bulk_urb(urb,
1474 serial->dev,
1475 usb_sndbulkpipe(serial->dev,
1476 port->bulk_out_endpointAddress),
1477 urb->transfer_buffer,
1478 transfer_size,
1479 mos7840_bulk_out_data_callback, mos7840_port);
1480
1481 data1 = urb->transfer_buffer;
1482 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress);
1483
1484 /* send it down the pipe */
1485 status = usb_submit_urb(urb, GFP_ATOMIC);
1486
1487 if (status) {
0de9a702 1488 mos7840_port->busy[i] = 0;
194343d9
GKH		 1489 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1490 "with status = %d\n", __func__, status);
3f542974
PS		 1491 bytes_sent = status;
1492 goto exit;
1493 }
1494 bytes_sent = transfer_size;
1495 mos7840_port->icount.tx += transfer_size;
0de9a702 1496 smp_wmb();
3f542974 1497 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
95da310e 1498exit:
3f542974
PS		 1499 return bytes_sent;
1500
1501}
1502
1503/*****************************************************************************
1504 * mos7840_throttle
1505 * this function is called by the tty driver when it wants to stop the data
1506 * being read from the port.
1507 *****************************************************************************/
1508
95da310e 1509static void mos7840_throttle(struct tty_struct *tty)
3f542974 1510{
95da310e 1511 struct usb_serial_port *port = tty->driver_data;
3f542974 1512 struct moschip_port *mos7840_port;
3f542974
PS		 1513 int status;
1514
441b62c1 1515 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1516 dbg("%s", "Invalid port \n");
1517 return;
1518 }
1519
1520 dbg("- port %d\n", port->number);
1521
1522 mos7840_port = mos7840_get_port_private(port);
1523
1524 if (mos7840_port == NULL)
1525 return;
1526
1527 if (!mos7840_port->open) {
1528 dbg("%s\n", "port not opened");
1529 return;
1530 }
1531
1532 dbg("%s", "Entering .......... \n");
1533
3f542974
PS		 1534 /* if we are implementing XON/XOFF, send the stop character */
1535 if (I_IXOFF(tty)) {
1536 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1537 status = mos7840_write(tty, port, &stop_char, 1);
1538 if (status <= 0)
3f542974 1539 return;
3f542974 1540 }
3f542974
PS		 1541 /* if we are implementing RTS/CTS, toggle that line */
1542 if (tty->termios->c_cflag & CRTSCTS) {
1543 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1544 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1545 mos7840_port->shadowMCR);
95da310e 1546 if (status < 0)
3f542974 1547 return;
3f542974
PS		 1548 }
1549
1550 return;
1551}
1552
1553/*****************************************************************************
1554 * mos7840_unthrottle
880af9db
AC		 1555 * this function is called by the tty driver when it wants to resume
1556 * the data being read from the port (called after mos7840_throttle is
1557 * called)
3f542974 1558 *****************************************************************************/
95da310e 1559static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1560{
95da310e 1561 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1562 int status;
1563 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1564
441b62c1 1565 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1566 dbg("%s", "Invalid port \n");
1567 return;
1568 }
1569
1570 if (mos7840_port == NULL)
1571 return;
1572
1573 if (!mos7840_port->open) {
441b62c1 1574 dbg("%s - port not opened", __func__);
3f542974
PS		 1575 return;
1576 }
1577
1578 dbg("%s", "Entering .......... \n");
1579
3f542974
PS		 1580 /* if we are implementing XON/XOFF, send the start character */
1581 if (I_IXOFF(tty)) {
1582 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1583 status = mos7840_write(tty, port, &start_char, 1);
1584 if (status <= 0)
3f542974 1585 return;
3f542974
PS		 1586 }
1587
1588 /* if we are implementing RTS/CTS, toggle that line */
1589 if (tty->termios->c_cflag & CRTSCTS) {
1590 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1591 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1592 mos7840_port->shadowMCR);
95da310e 1593 if (status < 0)
3f542974 1594 return;
3f542974 1595 }
3f542974
PS		 1596}
1597
95da310e 1598static int mos7840_tiocmget(struct tty_struct *tty, struct file *file)
3f542974 1599{
95da310e 1600 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1601 struct moschip_port *mos7840_port;
1602 unsigned int result;
1603 __u16 msr;
1604 __u16 mcr;
880af9db 1605 int status;
3f542974
PS		 1606 mos7840_port = mos7840_get_port_private(port);
1607
441b62c1 1608 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1609
1610 if (mos7840_port == NULL)
1611 return -ENODEV;
1612
1613 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1614 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1615 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1616 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1617 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1618 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1619 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1620 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1621 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1622
441b62c1 1623 dbg("%s - 0x%04X", __func__, result);
3f542974
PS		 1624
1625 return result;
1626}
1627
95da310e 1628static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
3f542974
PS		 1629 unsigned int set, unsigned int clear)
1630{
95da310e 1631 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1632 struct moschip_port *mos7840_port;
1633 unsigned int mcr;
87521c46 1634 int status;
3f542974 1635
441b62c1 1636 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1637
1638 mos7840_port = mos7840_get_port_private(port);
1639
1640 if (mos7840_port == NULL)
1641 return -ENODEV;
1642
e2984494 1643 /* FIXME: What locks the port registers ? */
3f542974
PS		 1644 mcr = mos7840_port->shadowMCR;
1645 if (clear & TIOCM_RTS)
1646 mcr &= ~MCR_RTS;
1647 if (clear & TIOCM_DTR)
1648 mcr &= ~MCR_DTR;
1649 if (clear & TIOCM_LOOP)
1650 mcr &= ~MCR_LOOPBACK;
1651
1652 if (set & TIOCM_RTS)
1653 mcr |= MCR_RTS;
1654 if (set & TIOCM_DTR)
1655 mcr |= MCR_DTR;
1656 if (set & TIOCM_LOOP)
1657 mcr |= MCR_LOOPBACK;
1658
1659 mos7840_port->shadowMCR = mcr;
1660
3f542974
PS		 1661 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1662 if (status < 0) {
1663 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
87521c46 1664 return status;
3f542974
PS		 1665 }
1666
1667 return 0;
1668}
1669
1670/*****************************************************************************
1671 * mos7840_calc_baud_rate_divisor
1672 * this function calculates the proper baud rate divisor for the specified
1673 * baud rate.
1674 *****************************************************************************/
1675static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
880af9db 1676 __u16 *clk_sel_val)
3f542974
PS		 1677{
1678
441b62c1 1679 dbg("%s - %d", __func__, baudRate);
3f542974
PS		 1680
1681 if (baudRate <= 115200) {
1682 *divisor = 115200 / baudRate;
1683 *clk_sel_val = 0x0;
1684 }
1685 if ((baudRate > 115200) && (baudRate <= 230400)) {
1686 *divisor = 230400 / baudRate;
1687 *clk_sel_val = 0x10;
1688 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1689 *divisor = 403200 / baudRate;
1690 *clk_sel_val = 0x20;
1691 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1692 *divisor = 460800 / baudRate;
1693 *clk_sel_val = 0x30;
1694 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1695 *divisor = 806400 / baudRate;
1696 *clk_sel_val = 0x40;
1697 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1698 *divisor = 921600 / baudRate;
1699 *clk_sel_val = 0x50;
1700 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1701 *divisor = 1572864 / baudRate;
1702 *clk_sel_val = 0x60;
1703 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1704 *divisor = 3145728 / baudRate;
1705 *clk_sel_val = 0x70;
1706 }
1707 return 0;
1708
1709#ifdef NOTMCS7840
1710
1711 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1712 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1713 *divisor = mos7840_divisor_table[i].Divisor;
1714 return 0;
1715 }
1716 }
1717
1718 /* After trying for all the standard baud rates *
1719 * Try calculating the divisor for this baud rate */
1720
1721 if (baudrate > 75 && baudrate < 230400) {
1722 /* get the divisor */
1723 custom = (__u16) (230400L / baudrate);
1724
1725 /* Check for round off */
1726 round1 = (__u16) (2304000L / baudrate);
1727 round = (__u16) (round1 - (custom * 10));
880af9db 1728 if (round > 4)
3f542974 1729 custom++;
3f542974
PS		 1730 *divisor = custom;
1731
1732 dbg(" Baud %d = %d\n", baudrate, custom);
1733 return 0;
1734 }
1735
1736 dbg("%s\n", " Baud calculation Failed...");
1737 return -1;
1738#endif
1739}
1740
1741/*****************************************************************************
1742 * mos7840_send_cmd_write_baud_rate
1743 * this function sends the proper command to change the baud rate of the
1744 * specified port.
1745 *****************************************************************************/
1746
1747static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1748 int baudRate)
1749{
1750 int divisor = 0;
1751 int status;
1752 __u16 Data;
1753 unsigned char number;
1754 __u16 clk_sel_val;
1755 struct usb_serial_port *port;
1756
1757 if (mos7840_port == NULL)
1758 return -1;
1759
1760 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 1761 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1762 dbg("%s", "Invalid port \n");
1763 return -1;
1764 }
1765
441b62c1 1766 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
3f542974
PS		 1767 dbg("%s", "Invalid Serial \n");
1768 return -1;
1769 }
1770
1771 dbg("%s", "Entering .......... \n");
1772
1773 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1774
441b62c1 1775 dbg("%s - port = %d, baud = %d", __func__,
3f542974 1776 mos7840_port->port->number, baudRate);
880af9db 1777 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1778 if (baudRate > 115200) {
1779#ifdef HW_flow_control
880af9db
AC		 1780 /* NOTE: need to see the pther register to modify */
1781 /* setting h/w flow control bit to 1 */
3f542974
PS		 1782 Data = 0x2b;
1783 mos7840_port->shadowMCR = Data;
880af9db
AC		 1784 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1785 Data);
3f542974
PS		 1786 if (status < 0) {
1787 dbg("Writing spreg failed in set_serial_baud\n");
1788 return -1;
1789 }
1790#endif
1791
1792 } else {
1793#ifdef HW_flow_control
880af9db 1794 / *setting h/w flow control bit to 0 */
3f542974
PS		 1795 Data = 0xb;
1796 mos7840_port->shadowMCR = Data;
880af9db
AC		 1797 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1798 Data);
3f542974
PS		 1799 if (status < 0) {
1800 dbg("Writing spreg failed in set_serial_baud\n");
1801 return -1;
1802 }
1803#endif
1804
1805 }
1806
880af9db 1807 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1808 clk_sel_val = 0x0;
1809 Data = 0x0;
880af9db 1810 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
3f542974 1811 &clk_sel_val);
880af9db
AC		 1812 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1813 &Data);
3f542974
PS		 1814 if (status < 0) {
1815 dbg("reading spreg failed in set_serial_baud\n");
1816 return -1;
1817 }
1818 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1819 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1820 Data);
3f542974
PS		 1821 if (status < 0) {
1822 dbg("Writing spreg failed in set_serial_baud\n");
1823 return -1;
1824 }
1825 /* Calculate the Divisor */
1826
1827 if (status) {
194343d9 1828 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1829 return status;
1830 }
1831 /* Enable access to divisor latch */
1832 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1833 mos7840_port->shadowLCR = Data;
1834 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1835
1836 /* Write the divisor */
1837 Data = (unsigned char)(divisor & 0xff);
1838 dbg("set_serial_baud Value to write DLL is %x\n", Data);
1839 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1840
1841 Data = (unsigned char)((divisor & 0xff00) >> 8);
1842 dbg("set_serial_baud Value to write DLM is %x\n", Data);
1843 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1844
1845 /* Disable access to divisor latch */
1846 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1847 mos7840_port->shadowLCR = Data;
1848 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1849
1850 }
3f542974
PS		 1851 return status;
1852}
1853
1854/*****************************************************************************
1855 * mos7840_change_port_settings
1856 * This routine is called to set the UART on the device to match
1857 * the specified new settings.
1858 *****************************************************************************/
1859
95da310e
AC		 1860static void mos7840_change_port_settings(struct tty_struct *tty,
1861 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1862{
3f542974
PS		 1863 int baud;
1864 unsigned cflag;
1865 unsigned iflag;
1866 __u8 lData;
1867 __u8 lParity;
1868 __u8 lStop;
1869 int status;
1870 __u16 Data;
1871 struct usb_serial_port *port;
1872 struct usb_serial *serial;
1873
1874 if (mos7840_port == NULL)
1875 return;
1876
1877 port = (struct usb_serial_port *)mos7840_port->port;
1878
441b62c1 1879 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1880 dbg("%s", "Invalid port \n");
1881 return;
1882 }
1883
441b62c1 1884 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
3f542974
PS		 1885 dbg("%s", "Invalid Serial \n");
1886 return;
1887 }
1888
1889 serial = port->serial;
1890
441b62c1 1891 dbg("%s - port %d", __func__, mos7840_port->port->number);
3f542974
PS		 1892
1893 if (!mos7840_port->open) {
441b62c1 1894 dbg("%s - port not opened", __func__);
3f542974
PS		 1895 return;
1896 }
1897
3f542974
PS		 1898 dbg("%s", "Entering .......... \n");
1899
1900 lData = LCR_BITS_8;
1901 lStop = LCR_STOP_1;
1902 lParity = LCR_PAR_NONE;
1903
1904 cflag = tty->termios->c_cflag;
1905 iflag = tty->termios->c_iflag;
1906
1907 /* Change the number of bits */
1908 if (cflag & CSIZE) {
1909 switch (cflag & CSIZE) {
1910 case CS5:
1911 lData = LCR_BITS_5;
1912 break;
1913
1914 case CS6:
1915 lData = LCR_BITS_6;
1916 break;
1917
1918 case CS7:
1919 lData = LCR_BITS_7;
1920 break;
1921 default:
1922 case CS8:
1923 lData = LCR_BITS_8;
1924 break;
1925 }
1926 }
1927 /* Change the Parity bit */
1928 if (cflag & PARENB) {
1929 if (cflag & PARODD) {
1930 lParity = LCR_PAR_ODD;
441b62c1 1931 dbg("%s - parity = odd", __func__);
3f542974
PS		 1932 } else {
1933 lParity = LCR_PAR_EVEN;
441b62c1 1934 dbg("%s - parity = even", __func__);
3f542974
PS		 1935 }
1936
1937 } else {
441b62c1 1938 dbg("%s - parity = none", __func__);
3f542974
PS		 1939 }
1940
880af9db 1941 if (cflag & CMSPAR)
3f542974 1942 lParity = lParity | 0x20;
3f542974
PS		 1943
1944 /* Change the Stop bit */
1945 if (cflag & CSTOPB) {
1946 lStop = LCR_STOP_2;
441b62c1 1947 dbg("%s - stop bits = 2", __func__);
3f542974
PS		 1948 } else {
1949 lStop = LCR_STOP_1;
441b62c1 1950 dbg("%s - stop bits = 1", __func__);
3f542974
PS		 1951 }
1952
1953 /* Update the LCR with the correct value */
1954 mos7840_port->shadowLCR &=
1955 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1956 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1957
1958 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
1959 mos7840_port->shadowLCR);
1960 /* Disable Interrupts */
1961 Data = 0x00;
1962 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1963
1964 Data = 0x00;
1965 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1966
1967 Data = 0xcf;
1968 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1969
1970 /* Send the updated LCR value to the mos7840 */
1971 Data = mos7840_port->shadowLCR;
1972
1973 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1974
1975 Data = 0x00b;
1976 mos7840_port->shadowMCR = Data;
1977 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1978 Data = 0x00b;
1979 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1980
1981 /* set up the MCR register and send it to the mos7840 */
1982
1983 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 1984 if (cflag & CBAUD)
3f542974 1985 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 1986
880af9db 1987 if (cflag & CRTSCTS)
3f542974 1988 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 1989 else
3f542974 1990 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 1991
1992 Data = mos7840_port->shadowMCR;
1993 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1994
1995 /* Determine divisor based on baud rate */
1996 baud = tty_get_baud_rate(tty);
1997
1998 if (!baud) {
1999 /* pick a default, any default... */
2000 dbg("%s\n", "Picked default baud...");
2001 baud = 9600;
2002 }
2003
441b62c1 2004 dbg("%s - baud rate = %d", __func__, baud);
3f542974
PS		 2005 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2006
2007 /* Enable Interrupts */
2008 Data = 0x0c;
2009 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2010
50de36f7 2011 if (mos7840_port->read_urb_busy == false) {
3f542974 2012 mos7840_port->read_urb->dev = serial->dev;
50de36f7 2013 mos7840_port->read_urb_busy = true;
3f542974 2014 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
3f542974 2015 if (status) {
50de36f7 2016 dbg("usb_submit_urb(read bulk) failed, status = %d",
3f542974 2017 status);
50de36f7 2018 mos7840_port->read_urb_busy = false;
3f542974
PS		 2019 }
2020 }
2021 wake_up(&mos7840_port->delta_msr_wait);
2022 mos7840_port->delta_msr_cond = 1;
2023 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
2024 mos7840_port->shadowLCR);
2025
2026 return;
2027}
2028
2029/*****************************************************************************
2030 * mos7840_set_termios
2031 * this function is called by the tty driver when it wants to change
2032 * the termios structure
2033 *****************************************************************************/
2034
95da310e
AC		 2035static void mos7840_set_termios(struct tty_struct *tty,
2036 struct usb_serial_port *port,
606d099c 2037 struct ktermios *old_termios)
3f542974
PS		 2038{
2039 int status;
2040 unsigned int cflag;
2041 struct usb_serial *serial;
2042 struct moschip_port *mos7840_port;
3f542974 2043 dbg("mos7840_set_termios: START\n");
441b62c1 2044 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2045 dbg("%s", "Invalid port \n");
2046 return;
2047 }
2048
2049 serial = port->serial;
2050
441b62c1 2051 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 2052 dbg("%s", "Invalid Serial \n");
2053 return;
2054 }
2055
2056 mos7840_port = mos7840_get_port_private(port);
2057
2058 if (mos7840_port == NULL)
2059 return;
2060
3f542974 2061 if (!mos7840_port->open) {
441b62c1 2062 dbg("%s - port not opened", __func__);
3f542974
PS		 2063 return;
2064 }
2065
2066 dbg("%s\n", "setting termios - ");
2067
2068 cflag = tty->termios->c_cflag;
2069
441b62c1 2070 dbg("%s - clfag %08x iflag %08x", __func__,
3f542974 2071 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
441b62c1 2072 dbg("%s - old clfag %08x old iflag %08x", __func__,
3d3ddce5 2073 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
441b62c1 2074 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 2075
2076 /* change the port settings to the new ones specified */
2077
95da310e 2078 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2079
2080 if (!mos7840_port->read_urb) {
2081 dbg("%s", "URB KILLED !!!!!\n");
2082 return;
2083 }
2084
50de36f7 2085 if (mos7840_port->read_urb_busy == false) {
3f542974 2086 mos7840_port->read_urb->dev = serial->dev;
50de36f7 2087 mos7840_port->read_urb_busy = true;
3f542974
PS		 2088 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2089 if (status) {
50de36f7 2090 dbg("usb_submit_urb(read bulk) failed, status = %d",
3f542974 2091 status);
50de36f7 2092 mos7840_port->read_urb_busy = false;
3f542974
PS		 2093 }
2094 }
2095 return;
2096}
2097
2098/*****************************************************************************
2099 * mos7840_get_lsr_info - get line status register info
2100 *
2101 * Purpose: Let user call ioctl() to get info when the UART physically
2102 * is emptied. On bus types like RS485, the transmitter must
2103 * release the bus after transmitting. This must be done when
2104 * the transmit shift register is empty, not be done when the
2105 * transmit holding register is empty. This functionality
2106 * allows an RS485 driver to be written in user space.
2107 *****************************************************************************/
2108
95da310e 2109static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2110 unsigned int __user *value)
3f542974
PS		 2111{
2112 int count;
2113 unsigned int result = 0;
2114
95da310e 2115 count = mos7840_chars_in_buffer(tty);
3f542974 2116 if (count == 0) {
441b62c1 2117 dbg("%s -- Empty", __func__);
3f542974
PS		 2118 result = TIOCSER_TEMT;
2119 }
2120
2121 if (copy_to_user(value, &result, sizeof(int)))
2122 return -EFAULT;
2123 return 0;
2124}
2125
3f542974
PS		 2126/*****************************************************************************
2127 * mos7840_set_modem_info
2128 * function to set modem info
2129 *****************************************************************************/
2130
95da310e
AC		 2131/* FIXME: Should be using the model control hooks */
2132
3f542974 2133static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
97c4965d 2134 unsigned int cmd, unsigned int __user *value)
3f542974
PS		 2135{
2136 unsigned int mcr;
2137 unsigned int arg;
2138 __u16 Data;
2139 int status;
2140 struct usb_serial_port *port;
2141
2142 if (mos7840_port == NULL)
2143 return -1;
2144
2145 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 2146 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2147 dbg("%s", "Invalid port \n");
2148 return -1;
2149 }
2150
2151 mcr = mos7840_port->shadowMCR;
2152
2153 if (copy_from_user(&arg, value, sizeof(int)))
2154 return -EFAULT;
2155
2156 switch (cmd) {
2157 case TIOCMBIS:
2158 if (arg & TIOCM_RTS)
2159 mcr |= MCR_RTS;
2160 if (arg & TIOCM_DTR)
2161 mcr |= MCR_RTS;
2162 if (arg & TIOCM_LOOP)
2163 mcr |= MCR_LOOPBACK;
2164 break;
2165
2166 case TIOCMBIC:
2167 if (arg & TIOCM_RTS)
2168 mcr &= ~MCR_RTS;
2169 if (arg & TIOCM_DTR)
2170 mcr &= ~MCR_RTS;
2171 if (arg & TIOCM_LOOP)
2172 mcr &= ~MCR_LOOPBACK;
2173 break;
2174
2175 case TIOCMSET:
2176 /* turn off the RTS and DTR and LOOPBACK
2177 * and then only turn on what was asked to */
2178 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK);
2179 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0);
2180 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0);
2181 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0);
2182 break;
2183 }
2184
6b447f04 2185 lock_kernel();
3f542974
PS		 2186 mos7840_port->shadowMCR = mcr;
2187
2188 Data = mos7840_port->shadowMCR;
3f542974 2189 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
6b447f04 2190 unlock_kernel();
3f542974
PS		 2191 if (status < 0) {
2192 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
2193 return -1;
2194 }
2195
2196 return 0;
2197}
2198
2199/*****************************************************************************
2200 * mos7840_get_modem_info
2201 * function to get modem info
2202 *****************************************************************************/
2203
2204static int mos7840_get_modem_info(struct moschip_port *mos7840_port,
97c4965d 2205 unsigned int __user *value)
3f542974
PS		 2206{
2207 unsigned int result = 0;
2208 __u16 msr;
2209 unsigned int mcr = mos7840_port->shadowMCR;
880af9db 2210 mos7840_get_uart_reg(mos7840_port->port,
95da310e 2211 MODEM_STATUS_REGISTER, &msr);
3f542974
PS		 2212 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
2213 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
2214 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
2215 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */
2216 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
2217 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
2218
441b62c1 2219 dbg("%s -- %x", __func__, result);
3f542974
PS		 2220
2221 if (copy_to_user(value, &result, sizeof(int)))
2222 return -EFAULT;
2223 return 0;
2224}
2225
2226/*****************************************************************************
2227 * mos7840_get_serial_info
2228 * function to get information about serial port
2229 *****************************************************************************/
2230
2231static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2232 struct serial_struct __user *retinfo)
3f542974
PS		 2233{
2234 struct serial_struct tmp;
2235
2236 if (mos7840_port == NULL)
2237 return -1;
2238
2239 if (!retinfo)
2240 return -EFAULT;
2241
2242 memset(&tmp, 0, sizeof(tmp));
2243
2244 tmp.type = PORT_16550A;
2245 tmp.line = mos7840_port->port->serial->minor;
2246 tmp.port = mos7840_port->port->number;
2247 tmp.irq = 0;
2248 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2249 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2250 tmp.baud_base = 9600;
2251 tmp.close_delay = 5 * HZ;
2252 tmp.closing_wait = 30 * HZ;
2253
2254 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2255 return -EFAULT;
2256 return 0;
2257}
2258
2259/*****************************************************************************
2260 * SerialIoctl
2261 * this function handles any ioctl calls to the driver
2262 *****************************************************************************/
2263
95da310e 2264static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
3f542974
PS		 2265 unsigned int cmd, unsigned long arg)
2266{
95da310e 2267 struct usb_serial_port *port = tty->driver_data;
97c4965d 2268 void __user *argp = (void __user *)arg;
3f542974 2269 struct moschip_port *mos7840_port;
3f542974
PS		 2270
2271 struct async_icount cnow;
2272 struct async_icount cprev;
2273 struct serial_icounter_struct icount;
2274 int mosret = 0;
3f542974 2275
441b62c1 2276 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2277 dbg("%s", "Invalid port \n");
2278 return -1;
2279 }
2280
2281 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2282
2283 if (mos7840_port == NULL)
2284 return -1;
2285
441b62c1 2286 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
3f542974
PS		 2287
2288 switch (cmd) {
2289 /* return number of bytes available */
2290
3f542974 2291 case TIOCSERGETLSR:
441b62c1 2292 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
95da310e 2293 return mos7840_get_lsr_info(tty, argp);
3f542974
PS		 2294 return 0;
2295
95da310e 2296 /* FIXME: use the modem hooks and remove this */
3f542974
PS		 2297 case TIOCMBIS:
2298 case TIOCMBIC:
2299 case TIOCMSET:
441b62c1 2300 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__,
3f542974
PS		 2301 port->number);
2302 mosret =
97c4965d 2303 mos7840_set_modem_info(mos7840_port, cmd, argp);
3f542974
PS		 2304 return mosret;
2305
2306 case TIOCMGET:
441b62c1 2307 dbg("%s (%d) TIOCMGET", __func__, port->number);
97c4965d 2308 return mos7840_get_modem_info(mos7840_port, argp);
3f542974
PS		 2309
2310 case TIOCGSERIAL:
441b62c1 2311 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
97c4965d 2312 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2313
2314 case TIOCSSERIAL:
441b62c1 2315 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
3f542974
PS		 2316 break;
2317
2318 case TIOCMIWAIT:
441b62c1 2319 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
3f542974
PS		 2320 cprev = mos7840_port->icount;
2321 while (1) {
880af9db 2322 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974
PS		 2323 mos7840_port->delta_msr_cond = 0;
2324 wait_event_interruptible(mos7840_port->delta_msr_wait,
2325 (mos7840_port->
2326 delta_msr_cond == 1));
2327
2328 /* see if a signal did it */
2329 if (signal_pending(current))
2330 return -ERESTARTSYS;
2331 cnow = mos7840_port->icount;
0de9a702 2332 smp_rmb();
3f542974
PS		 2333 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2334 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2335 return -EIO; /* no change => error */
2336 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2337 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2338 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2339 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2340 return 0;
2341 }
2342 cprev = cnow;
2343 }
2344 /* NOTREACHED */
2345 break;
2346
2347 case TIOCGICOUNT:
2348 cnow = mos7840_port->icount;
0de9a702 2349 smp_rmb();
3f542974
PS		 2350 icount.cts = cnow.cts;
2351 icount.dsr = cnow.dsr;
2352 icount.rng = cnow.rng;
2353 icount.dcd = cnow.dcd;
2354 icount.rx = cnow.rx;
2355 icount.tx = cnow.tx;
2356 icount.frame = cnow.frame;
2357 icount.overrun = cnow.overrun;
2358 icount.parity = cnow.parity;
2359 icount.brk = cnow.brk;
2360 icount.buf_overrun = cnow.buf_overrun;
2361
441b62c1 2362 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
3f542974 2363 port->number, icount.rx, icount.tx);
97c4965d 2364 if (copy_to_user(argp, &icount, sizeof(icount)))
3f542974
PS		 2365 return -EFAULT;
2366 return 0;
3f542974
PS		 2367 default:
2368 break;
2369 }
3f542974
PS		 2370 return -ENOIOCTLCMD;
2371}
2372
2373static int mos7840_calc_num_ports(struct usb_serial *serial)
2374{
0de9a702 2375 int mos7840_num_ports = 0;
3f542974
PS		 2376
2377 dbg("numberofendpoints: %d \n",
2378 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
2379 dbg("numberofendpoints: %d \n",
2380 (int)serial->interface->altsetting->desc.bNumEndpoints);
2381 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
0de9a702 2382 mos7840_num_ports = serial->num_ports = 2;
3f542974 2383 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
0de9a702
ON		 2384 serial->num_bulk_in = 4;
2385 serial->num_bulk_out = 4;
2386 mos7840_num_ports = serial->num_ports = 4;
3f542974
PS		 2387 }
2388
2389 return mos7840_num_ports;
2390}
2391
2392/****************************************************************************
2393 * mos7840_startup
2394 ****************************************************************************/
2395
2396static int mos7840_startup(struct usb_serial *serial)
2397{
2398 struct moschip_port *mos7840_port;
2399 struct usb_device *dev;
2400 int i, status;
2401
2402 __u16 Data;
2403 dbg("%s \n", " mos7840_startup :entering..........");
2404
2405 if (!serial) {
2406 dbg("%s\n", "Invalid Handler");
2407 return -1;
2408 }
2409
2410 dev = serial->dev;
2411
2412 dbg("%s\n", "Entering...");
2413
2414 /* we set up the pointers to the endpoints in the mos7840_open *
2415 * function, as the structures aren't created yet. */
2416
2417 /* set up port private structures */
2418 for (i = 0; i < serial->num_ports; ++i) {
7ac9da10 2419 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
3f542974 2420 if (mos7840_port == NULL) {
194343d9 2421 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
0de9a702
ON		 2422 status = -ENOMEM;
2423 i--; /* don't follow NULL pointer cleaning up */
2424 goto error;
3f542974 2425 }
3f542974 2426
880af9db
AC		 2427 /* Initialize all port interrupt end point to port 0 int
2428 * endpoint. Our device has only one interrupt end point
2429 * common to all port */
3f542974
PS		 2430
2431 mos7840_port->port = serial->port[i];
2432 mos7840_set_port_private(serial->port[i], mos7840_port);
0de9a702 2433 spin_lock_init(&mos7840_port->pool_lock);
3f542974 2434
37768adf
TC		 2435 /* minor is not initialised until later by
2436 * usb-serial.c:get_free_serial() and cannot therefore be used
2437 * to index device instances */
2438 mos7840_port->port_num = i + 1;
2439 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2440 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2441 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2442 dbg ("serial->minor = %d", serial->minor);
3f542974
PS		 2443
2444 if (mos7840_port->port_num == 1) {
2445 mos7840_port->SpRegOffset = 0x0;
2446 mos7840_port->ControlRegOffset = 0x1;
2447 mos7840_port->DcrRegOffset = 0x4;
2448 } else if ((mos7840_port->port_num == 2)
0de9a702 2449 && (serial->num_ports == 4)) {
3f542974
PS		 2450 mos7840_port->SpRegOffset = 0x8;
2451 mos7840_port->ControlRegOffset = 0x9;
2452 mos7840_port->DcrRegOffset = 0x16;
2453 } else if ((mos7840_port->port_num == 2)
0de9a702 2454 && (serial->num_ports == 2)) {
3f542974
PS		 2455 mos7840_port->SpRegOffset = 0xa;
2456 mos7840_port->ControlRegOffset = 0xb;
2457 mos7840_port->DcrRegOffset = 0x19;
2458 } else if ((mos7840_port->port_num == 3)
0de9a702 2459 && (serial->num_ports == 4)) {
3f542974
PS		 2460 mos7840_port->SpRegOffset = 0xa;
2461 mos7840_port->ControlRegOffset = 0xb;
2462 mos7840_port->DcrRegOffset = 0x19;
2463 } else if ((mos7840_port->port_num == 4)
0de9a702 2464 && (serial->num_ports == 4)) {
3f542974
PS		 2465 mos7840_port->SpRegOffset = 0xc;
2466 mos7840_port->ControlRegOffset = 0xd;
2467 mos7840_port->DcrRegOffset = 0x1c;
2468 }
2469 mos7840_dump_serial_port(mos7840_port);
3f542974
PS		 2470 mos7840_set_port_private(serial->port[i], mos7840_port);
2471
880af9db
AC		 2472 /* enable rx_disable bit in control register */
2473 status = mos7840_get_reg_sync(serial->port[i],
2474 mos7840_port->ControlRegOffset, &Data);
3f542974
PS		 2475 if (status < 0) {
2476 dbg("Reading ControlReg failed status-0x%x\n", status);
2477 break;
2478 } else
2479 dbg("ControlReg Reading success val is %x, status%d\n",
2480 Data, status);
880af9db
AC		 2481 Data |= 0x08; /* setting driver done bit */
2482 Data |= 0x04; /* sp1_bit to have cts change reflect in
2483 modem status reg */
3f542974 2484
880af9db
AC		 2485 /* Data |= 0x20; //rx_disable bit */
2486 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2487 mos7840_port->ControlRegOffset, Data);
2488 if (status < 0) {
2489 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2490 break;
2491 } else
2492 dbg("ControlReg Writing success(rx_disable) status%d\n",
2493 status);
2494
880af9db
AC		 2495 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2496 and 0x24 in DCR3 */
3f542974 2497 Data = 0x01;
880af9db
AC		 2498 status = mos7840_set_reg_sync(serial->port[i],
2499 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
3f542974
PS		 2500 if (status < 0) {
2501 dbg("Writing DCR0 failed status-0x%x\n", status);
2502 break;
2503 } else
2504 dbg("DCR0 Writing success status%d\n", status);
2505
2506 Data = 0x05;
880af9db
AC		 2507 status = mos7840_set_reg_sync(serial->port[i],
2508 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
3f542974
PS		 2509 if (status < 0) {
2510 dbg("Writing DCR1 failed status-0x%x\n", status);
2511 break;
2512 } else
2513 dbg("DCR1 Writing success status%d\n", status);
2514
2515 Data = 0x24;
880af9db
AC		 2516 status = mos7840_set_reg_sync(serial->port[i],
2517 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
3f542974
PS		 2518 if (status < 0) {
2519 dbg("Writing DCR2 failed status-0x%x\n", status);
2520 break;
2521 } else
2522 dbg("DCR2 Writing success status%d\n", status);
2523
880af9db 2524 /* write values in clkstart0x0 and clkmulti 0x20 */
3f542974 2525 Data = 0x0;
880af9db 2526 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2527 CLK_START_VALUE_REGISTER, Data);
2528 if (status < 0) {
2529 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2530 break;
2531 } else
2532 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2533
2534 Data = 0x20;
880af9db
AC		 2535 status = mos7840_set_reg_sync(serial->port[i],
2536 CLK_MULTI_REGISTER, Data);
3f542974
PS		 2537 if (status < 0) {
2538 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
2539 status);
0de9a702 2540 goto error;
3f542974
PS		 2541 } else
2542 dbg("CLK_MULTI_REGISTER Writing success status%d\n",
2543 status);
2544
880af9db 2545 /* write value 0x0 to scratchpad register */
3f542974 2546 Data = 0x00;
880af9db
AC		 2547 status = mos7840_set_uart_reg(serial->port[i],
2548 SCRATCH_PAD_REGISTER, Data);
3f542974
PS		 2549 if (status < 0) {
2550 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
2551 status);
2552 break;
2553 } else
2554 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
2555 status);
2556
880af9db 2557 /* Zero Length flag register */
3f542974 2558 if ((mos7840_port->port_num != 1)
0de9a702 2559 && (serial->num_ports == 2)) {
3f542974
PS		 2560
2561 Data = 0xff;
3f542974 2562 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2563 (__u16) (ZLP_REG1 +
2564 ((__u16)mos7840_port->port_num)), Data);
3f542974
PS		 2565 dbg("ZLIP offset%x\n",
2566 (__u16) (ZLP_REG1 +
880af9db 2567 ((__u16) mos7840_port->port_num)));
3f542974
PS		 2568 if (status < 0) {
2569 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2570 i + 2, status);
2571 break;
2572 } else
2573 dbg("ZLP_REG%d Writing success status%d\n",
2574 i + 2, status);
2575 } else {
2576 Data = 0xff;
3f542974 2577 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2578 (__u16) (ZLP_REG1 +
2579 ((__u16)mos7840_port->port_num) - 0x1), Data);
3f542974
PS		 2580 dbg("ZLIP offset%x\n",
2581 (__u16) (ZLP_REG1 +
2582 ((__u16) mos7840_port->port_num) - 0x1));
2583 if (status < 0) {
2584 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2585 i + 1, status);
2586 break;
2587 } else
2588 dbg("ZLP_REG%d Writing success status%d\n",
2589 i + 1, status);
2590
2591 }
0de9a702 2592 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974 2593 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
880af9db
AC		 2594 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2595 GFP_KERNEL);
2596 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2597 !mos7840_port->dr) {
0de9a702
ON		 2598 status = -ENOMEM;
2599 goto error;
2600 }
3f542974
PS		 2601 }
2602
880af9db 2603 /* Zero Length flag enable */
3f542974 2604 Data = 0x0f;
3f542974
PS		 2605 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2606 if (status < 0) {
2607 dbg("Writing ZLP_REG5 failed status-0x%x\n", status);
7ced46c3 2608 goto error;
3f542974
PS		 2609 } else
2610 dbg("ZLP_REG5 Writing success status%d\n", status);
2611
2612 /* setting configuration feature to one */
2613 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
97c4965d 2614 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
3f542974 2615 return 0;
0de9a702
ON		 2616error:
2617 for (/* nothing */; i >= 0; i--) {
2618 mos7840_port = mos7840_get_port_private(serial->port[i]);
2619
2620 kfree(mos7840_port->dr);
2621 kfree(mos7840_port->ctrl_buf);
2622 usb_free_urb(mos7840_port->control_urb);
2623 kfree(mos7840_port);
2624 serial->port[i] = NULL;
2625 }
2626 return status;
3f542974
PS		 2627}
2628
2629/****************************************************************************
2630 * mos7840_shutdown
2631 * This function is called whenever the device is removed from the usb bus.
2632 ****************************************************************************/
2633
2634static void mos7840_shutdown(struct usb_serial *serial)
2635{
2636 int i;
0de9a702 2637 unsigned long flags;
3f542974
PS		 2638 struct moschip_port *mos7840_port;
2639 dbg("%s \n", " shutdown :entering..........");
2640
2641 if (!serial) {
2642 dbg("%s", "Invalid Handler \n");
2643 return;
2644 }
2645
880af9db 2646 /* check for the ports to be closed,close the ports and disconnect */
3f542974
PS		 2647
2648 /* free private structure allocated for serial port *
2649 * stop reads and writes on all ports */
2650
2651 for (i = 0; i < serial->num_ports; ++i) {
2652 mos7840_port = mos7840_get_port_private(serial->port[i]);
37768adf
TC		 2653 dbg ("mos7840_port %d = %p", i, mos7840_port);
2654 if (mos7840_port) {
2655 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2656 mos7840_port->zombie = 1;
2657 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
2658 usb_kill_urb(mos7840_port->control_urb);
2659 kfree(mos7840_port->ctrl_buf);
2660 kfree(mos7840_port->dr);
2661 kfree(mos7840_port);
2662 }
3f542974
PS		 2663 mos7840_set_port_private(serial->port[i], NULL);
2664 }
2665
2666 dbg("%s\n", "Thank u :: ");
2667
2668}
2669
d9b1b787
JH		 2670static struct usb_driver io_driver = {
2671 .name = "mos7840",
2672 .probe = usb_serial_probe,
2673 .disconnect = usb_serial_disconnect,
2674 .id_table = moschip_id_table_combined,
2675 .no_dynamic_id = 1,
2676};
2677
3f542974
PS		 2678static struct usb_serial_driver moschip7840_4port_device = {
2679 .driver = {
2680 .owner = THIS_MODULE,
2681 .name = "mos7840",
2682 },
2683 .description = DRIVER_DESC,
d9b1b787 2684 .usb_driver = &io_driver,
3f542974 2685 .id_table = moschip_port_id_table,
3f542974 2686 .num_ports = 4,
3f542974
PS		 2687 .open = mos7840_open,
2688 .close = mos7840_close,
2689 .write = mos7840_write,
2690 .write_room = mos7840_write_room,
2691 .chars_in_buffer = mos7840_chars_in_buffer,
2692 .throttle = mos7840_throttle,
2693 .unthrottle = mos7840_unthrottle,
2694 .calc_num_ports = mos7840_calc_num_ports,
2695#ifdef MCSSerialProbe
2696 .probe = mos7840_serial_probe,
2697#endif
2698 .ioctl = mos7840_ioctl,
2699 .set_termios = mos7840_set_termios,
2700 .break_ctl = mos7840_break,
2701 .tiocmget = mos7840_tiocmget,
2702 .tiocmset = mos7840_tiocmset,
2703 .attach = mos7840_startup,
2704 .shutdown = mos7840_shutdown,
2705 .read_bulk_callback = mos7840_bulk_in_callback,
2706 .read_int_callback = mos7840_interrupt_callback,
2707};
2708
3f542974
PS		 2709/****************************************************************************
2710 * moschip7840_init
2711 * This is called by the module subsystem, or on startup to initialize us
2712 ****************************************************************************/
2713static int __init moschip7840_init(void)
2714{
2715 int retval;
2716
2717 dbg("%s \n", " mos7840_init :entering..........");
2718
2719 /* Register with the usb serial */
2720 retval = usb_serial_register(&moschip7840_4port_device);
2721
2722 if (retval)
2723 goto failed_port_device_register;
2724
2725 dbg("%s\n", "Entring...");
c197a8db
GKH		 2726 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2727 DRIVER_DESC "\n");
3f542974
PS		 2728
2729 /* Register with the usb */
2730 retval = usb_register(&io_driver);
3f542974
PS		 2731 if (retval == 0) {
2732 dbg("%s\n", "Leaving...");
2733 return 0;
2734 }
3f542974 2735 usb_serial_deregister(&moschip7840_4port_device);
880af9db 2736failed_port_device_register:
3f542974
PS		 2737 return retval;
2738}
2739
2740/****************************************************************************
2741 * moschip7840_exit
2742 * Called when the driver is about to be unloaded.
2743 ****************************************************************************/
2744static void __exit moschip7840_exit(void)
2745{
2746
2747 dbg("%s \n", " mos7840_exit :entering..........");
2748
2749 usb_deregister(&io_driver);
2750
2751 usb_serial_deregister(&moschip7840_4port_device);
2752
2753 dbg("%s\n", "Entring...");
2754}
2755
2756module_init(moschip7840_init);
2757module_exit(moschip7840_exit);
2758
2759/* Module information */
2760MODULE_DESCRIPTION(DRIVER_DESC);
2761MODULE_LICENSE("GPL");
2762
2763module_param(debug, bool, S_IRUGO | S_IWUSR);
2764MODULE_PARM_DESC(debug, "Debug enabled or not");
kernel source for telekom puls (alcatel/mediatek)