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tty: Implement a drain delay in the tty port
[deliverable/linux.git] / drivers / usb / serial / mos7840.c
CommitLineData
3f542974
PS		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 *
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
18 *
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
22 *
23 */
24
25#include <linux/kernel.h>
26#include <linux/errno.h>
27#include <linux/init.h>
28#include <linux/slab.h>
29#include <linux/tty.h>
30#include <linux/tty_driver.h>
31#include <linux/tty_flip.h>
32#include <linux/module.h>
33#include <linux/serial.h>
34#include <linux/usb.h>
35#include <linux/usb/serial.h>
880af9db 36#include <linux/uaccess.h>
3f542974
PS		 37
38/*
39 * Version Information
40 */
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
1138/************************************************************************
1139 *
1140 * mos7840_block_until_tx_empty
1141 *
1142 * This function will block the close until one of the following:
1143 * 1. TX count are 0
1144 * 2. The mos7840 has stopped
dc0d5c1e 1145 * 3. A timeout of 3 seconds without activity has expired
3f542974
PS		 1146 *
1147 ************************************************************************/
95da310e
AC		 1148static void mos7840_block_until_tx_empty(struct tty_struct *tty,
1149 struct moschip_port *mos7840_port)
3f542974
PS		 1150{
1151 int timeout = HZ / 10;
1152 int wait = 30;
1153 int count;
1154
1155 while (1) {
1156
95da310e 1157 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1158
1159 /* Check for Buffer status */
880af9db 1160 if (count <= 0)
3f542974 1161 return;
3f542974
PS		 1162
1163 /* Block the thread for a while */
1164 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1165 timeout);
1166
1167 /* No activity.. count down section */
1168 wait--;
1169 if (wait == 0) {
441b62c1 1170 dbg("%s - TIMEOUT", __func__);
3f542974
PS		 1171 return;
1172 } else {
dc0d5c1e 1173 /* Reset timeout value back to seconds */
3f542974
PS		 1174 wait = 30;
1175 }
1176 }
1177}
1178
1179/*****************************************************************************
1180 * mos7840_close
1181 * this function is called by the tty driver when a port is closed
1182 *****************************************************************************/
1183
95da310e
AC		 1184static void mos7840_close(struct tty_struct *tty,
1185 struct usb_serial_port *port, struct file *filp)
3f542974
PS		 1186{
1187 struct usb_serial *serial;
1188 struct moschip_port *mos7840_port;
0de9a702 1189 struct moschip_port *port0;
3f542974
PS		 1190 int j;
1191 __u16 Data;
1192
1193 dbg("%s\n", "mos7840_close:entering...");
1194
441b62c1 1195 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1196 dbg("%s", "Port Paranoia failed \n");
1197 return;
1198 }
1199
441b62c1 1200 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 1201 if (!serial) {
1202 dbg("%s", "Serial Paranoia failed \n");
1203 return;
1204 }
1205
1206 mos7840_port = mos7840_get_port_private(port);
0de9a702 1207 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1208
0de9a702 1209 if (mos7840_port == NULL || port0 == NULL)
3f542974 1210 return;
3f542974
PS		 1211
1212 for (j = 0; j < NUM_URBS; ++j)
1213 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1214
1215 /* Freeing Write URBs */
1216 for (j = 0; j < NUM_URBS; ++j) {
1217 if (mos7840_port->write_urb_pool[j]) {
1218 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1219 kfree(mos7840_port->write_urb_pool[j]->
1220 transfer_buffer);
1221
1222 usb_free_urb(mos7840_port->write_urb_pool[j]);
1223 }
1224 }
1225
95da310e 1226 if (serial->dev)
3f542974 1227 /* flush and block until tx is empty */
95da310e 1228 mos7840_block_until_tx_empty(tty, mos7840_port);
3f542974
PS		 1229
1230 /* While closing port, shutdown all bulk read, write *
1231 * and interrupt read if they exists */
1232 if (serial->dev) {
3f542974
PS		 1233 if (mos7840_port->write_urb) {
1234 dbg("%s", "Shutdown bulk write\n");
1235 usb_kill_urb(mos7840_port->write_urb);
1236 }
3f542974
PS		 1237 if (mos7840_port->read_urb) {
1238 dbg("%s", "Shutdown bulk read\n");
1239 usb_kill_urb(mos7840_port->read_urb);
50de36f7 1240 mos7840_port->read_urb_busy = false;
3f542974
PS		 1241 }
1242 if ((&mos7840_port->control_urb)) {
1243 dbg("%s", "Shutdown control read\n");
880af9db 1244 /*/ usb_kill_urb (mos7840_port->control_urb); */
3f542974
PS		 1245 }
1246 }
880af9db
AC		 1247/* if(mos7840_port->ctrl_buf != NULL) */
1248/* kfree(mos7840_port->ctrl_buf); */
0de9a702 1249 port0->open_ports--;
3f542974 1250 dbg("mos7840_num_open_ports in close%d:in port%d\n",
0de9a702
ON		 1251 port0->open_ports, port->number);
1252 if (port0->open_ports == 0) {
3f542974
PS		 1253 if (serial->port[0]->interrupt_in_urb) {
1254 dbg("%s", "Shutdown interrupt_in_urb\n");
0de9a702 1255 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1256 }
1257 }
1258
1259 if (mos7840_port->write_urb) {
1260 /* if this urb had a transfer buffer already (old tx) free it */
880af9db 1261 if (mos7840_port->write_urb->transfer_buffer != NULL)
3f542974 1262 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1263 usb_free_urb(mos7840_port->write_urb);
1264 }
1265
1266 Data = 0x0;
1267 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1268
1269 Data = 0x00;
1270 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1271
1272 mos7840_port->open = 0;
1273
1274 dbg("%s \n", "Leaving ............");
1275}
1276
1277/************************************************************************
1278 *
1279 * mos7840_block_until_chase_response
1280 *
1281 * This function will block the close until one of the following:
1282 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1283 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1284 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1285 *
1286 ************************************************************************/
1287
95da310e
AC		 1288static void mos7840_block_until_chase_response(struct tty_struct *tty,
1289 struct moschip_port *mos7840_port)
3f542974
PS		 1290{
1291 int timeout = 1 * HZ;
1292 int wait = 10;
1293 int count;
1294
1295 while (1) {
95da310e 1296 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1297
1298 /* Check for Buffer status */
880af9db 1299 if (count <= 0)
3f542974 1300 return;
3f542974
PS		 1301
1302 /* Block the thread for a while */
1303 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1304 timeout);
1305 /* No activity.. count down section */
1306 wait--;
1307 if (wait == 0) {
441b62c1 1308 dbg("%s - TIMEOUT", __func__);
3f542974
PS		 1309 return;
1310 } else {
dc0d5c1e 1311 /* Reset timeout value back to seconds */
3f542974
PS		 1312 wait = 10;
1313 }
1314 }
1315
1316}
1317
1318/*****************************************************************************
1319 * mos7840_break
1320 * this function sends a break to the port
1321 *****************************************************************************/
95da310e 1322static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1323{
95da310e 1324 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1325 unsigned char data;
1326 struct usb_serial *serial;
1327 struct moschip_port *mos7840_port;
1328
1329 dbg("%s \n", "Entering ...........");
1330 dbg("mos7840_break: Start\n");
1331
441b62c1 1332 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1333 dbg("%s", "Port Paranoia failed \n");
1334 return;
1335 }
1336
441b62c1 1337 serial = mos7840_get_usb_serial(port, __func__);
3f542974
PS		 1338 if (!serial) {
1339 dbg("%s", "Serial Paranoia failed \n");
1340 return;
1341 }
1342
1343 mos7840_port = mos7840_get_port_private(port);
1344
880af9db 1345 if (mos7840_port == NULL)
3f542974 1346 return;
3f542974 1347
95da310e 1348 if (serial->dev)
3f542974 1349 /* flush and block until tx is empty */
95da310e 1350 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1351
95da310e 1352 if (break_state == -1)
3f542974 1353 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1354 else
3f542974 1355 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974 1356
6b447f04 1357 /* FIXME: no locking on shadowLCR anywhere in driver */
3f542974
PS		 1358 mos7840_port->shadowLCR = data;
1359 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
1360 mos7840_port->shadowLCR);
1361 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1362 mos7840_port->shadowLCR);
1363
1364 return;
1365}
1366
1367/*****************************************************************************
1368 * mos7840_write_room
1369 * this function is called by the tty driver when it wants to know how many
1370 * bytes of data we can accept for a specific port.
1371 * If successful, we return the amount of room that we have for this port
1372 * Otherwise we return a negative error number.
1373 *****************************************************************************/
1374
95da310e 1375static int mos7840_write_room(struct tty_struct *tty)
3f542974 1376{
95da310e 1377 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1378 int i;
1379 int room = 0;
0de9a702 1380 unsigned long flags;
3f542974
PS		 1381 struct moschip_port *mos7840_port;
1382
1383 dbg("%s \n", " mos7840_write_room:entering ...........");
1384
441b62c1 1385 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1386 dbg("%s", "Invalid port \n");
1387 dbg("%s \n", " mos7840_write_room:leaving ...........");
1388 return -1;
1389 }
1390
1391 mos7840_port = mos7840_get_port_private(port);
1392 if (mos7840_port == NULL) {
1393 dbg("%s \n", "mos7840_break:leaving ...........");
1394 return -1;
1395 }
1396
0de9a702 1397 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1398 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1399 if (!mos7840_port->busy[i])
3f542974 1400 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1401 }
0de9a702 1402 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1403
0de9a702 1404 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
441b62c1 1405 dbg("%s - returns %d", __func__, room);
0de9a702 1406 return room;
3f542974
PS		 1407
1408}
1409
1410/*****************************************************************************
1411 * mos7840_write
1412 * this function is called by the tty driver when data should be written to
1413 * the port.
1414 * If successful, we return the number of bytes written, otherwise we
1415 * return a negative error number.
1416 *****************************************************************************/
1417
95da310e 1418static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1419 const unsigned char *data, int count)
1420{
1421 int status;
1422 int i;
1423 int bytes_sent = 0;
1424 int transfer_size;
0de9a702 1425 unsigned long flags;
3f542974
PS		 1426
1427 struct moschip_port *mos7840_port;
1428 struct usb_serial *serial;
1429 struct urb *urb;
880af9db 1430 /* __u16 Data; */
3f542974
PS		 1431 const unsigned char *current_position = data;
1432 unsigned char *data1;
1433 dbg("%s \n", "entering ...........");
880af9db
AC		 1434 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1435 mos7840_port->shadowLCR); */
3f542974
PS		 1436
1437#ifdef NOTMOS7840
1438 Data = 0x00;
3f542974
PS		 1439 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1440 mos7840_port->shadowLCR = Data;
1441 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
1442 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1443 mos7840_port->shadowLCR);
1444
880af9db
AC		 1445 /* Data = 0x03; */
1446 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1447 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1448
880af9db 1449 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1450 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1451
880af9db
AC		 1452 /* Data = 0x0c; */
1453 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1454 Data = 0x00;
3f542974
PS		 1455 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1456 dbg("mos7840_write:DLL value is %x\n", Data);
1457
1458 Data = 0x0;
3f542974
PS		 1459 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1460 dbg("mos7840_write:DLM value is %x\n", Data);
1461
1462 Data = Data & ~SERIAL_LCR_DLAB;
1463 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1464 mos7840_port->shadowLCR);
3f542974
PS		 1465 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1466#endif
1467
441b62c1 1468 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1469 dbg("%s", "Port Paranoia failed \n");
1470 return -1;
1471 }
1472
1473 serial = port->serial;
441b62c1 1474 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 1475 dbg("%s", "Serial Paranoia failed \n");
1476 return -1;
1477 }
1478
1479 mos7840_port = mos7840_get_port_private(port);
1480 if (mos7840_port == NULL) {
1481 dbg("%s", "mos7840_port is NULL\n");
1482 return -1;
1483 }
1484
1485 /* try to find a free urb in the list */
1486 urb = NULL;
1487
0de9a702 1488 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1489 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1490 if (!mos7840_port->busy[i]) {
1491 mos7840_port->busy[i] = 1;
3f542974
PS		 1492 urb = mos7840_port->write_urb_pool[i];
1493 dbg("\nURB:%d", i);
1494 break;
1495 }
1496 }
0de9a702 1497 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1498
1499 if (urb == NULL) {
441b62c1 1500 dbg("%s - no more free urbs", __func__);
3f542974
PS		 1501 goto exit;
1502 }
1503
1504 if (urb->transfer_buffer == NULL) {
1505 urb->transfer_buffer =
1506 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1507
1508 if (urb->transfer_buffer == NULL) {
194343d9
GKH		 1509 dev_err(&port->dev, "%s no more kernel memory...\n",
1510 __func__);
3f542974
PS		 1511 goto exit;
1512 }
1513 }
1514 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1515
97c4965d 1516 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1517
1518 /* fill urb with data and submit */
1519 usb_fill_bulk_urb(urb,
1520 serial->dev,
1521 usb_sndbulkpipe(serial->dev,
1522 port->bulk_out_endpointAddress),
1523 urb->transfer_buffer,
1524 transfer_size,
1525 mos7840_bulk_out_data_callback, mos7840_port);
1526
1527 data1 = urb->transfer_buffer;
1528 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress);
1529
1530 /* send it down the pipe */
1531 status = usb_submit_urb(urb, GFP_ATOMIC);
1532
1533 if (status) {
0de9a702 1534 mos7840_port->busy[i] = 0;
194343d9
GKH		 1535 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1536 "with status = %d\n", __func__, status);
3f542974
PS		 1537 bytes_sent = status;
1538 goto exit;
1539 }
1540 bytes_sent = transfer_size;
1541 mos7840_port->icount.tx += transfer_size;
0de9a702 1542 smp_wmb();
3f542974 1543 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
95da310e 1544exit:
3f542974
PS		 1545 return bytes_sent;
1546
1547}
1548
1549/*****************************************************************************
1550 * mos7840_throttle
1551 * this function is called by the tty driver when it wants to stop the data
1552 * being read from the port.
1553 *****************************************************************************/
1554
95da310e 1555static void mos7840_throttle(struct tty_struct *tty)
3f542974 1556{
95da310e 1557 struct usb_serial_port *port = tty->driver_data;
3f542974 1558 struct moschip_port *mos7840_port;
3f542974
PS		 1559 int status;
1560
441b62c1 1561 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1562 dbg("%s", "Invalid port \n");
1563 return;
1564 }
1565
1566 dbg("- port %d\n", port->number);
1567
1568 mos7840_port = mos7840_get_port_private(port);
1569
1570 if (mos7840_port == NULL)
1571 return;
1572
1573 if (!mos7840_port->open) {
1574 dbg("%s\n", "port not opened");
1575 return;
1576 }
1577
1578 dbg("%s", "Entering .......... \n");
1579
3f542974
PS		 1580 /* if we are implementing XON/XOFF, send the stop character */
1581 if (I_IXOFF(tty)) {
1582 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1583 status = mos7840_write(tty, port, &stop_char, 1);
1584 if (status <= 0)
3f542974 1585 return;
3f542974 1586 }
3f542974
PS		 1587 /* if we are implementing RTS/CTS, toggle that line */
1588 if (tty->termios->c_cflag & CRTSCTS) {
1589 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1590 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1591 mos7840_port->shadowMCR);
95da310e 1592 if (status < 0)
3f542974 1593 return;
3f542974
PS		 1594 }
1595
1596 return;
1597}
1598
1599/*****************************************************************************
1600 * mos7840_unthrottle
880af9db
AC		 1601 * this function is called by the tty driver when it wants to resume
1602 * the data being read from the port (called after mos7840_throttle is
1603 * called)
3f542974 1604 *****************************************************************************/
95da310e 1605static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1606{
95da310e 1607 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1608 int status;
1609 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1610
441b62c1 1611 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1612 dbg("%s", "Invalid port \n");
1613 return;
1614 }
1615
1616 if (mos7840_port == NULL)
1617 return;
1618
1619 if (!mos7840_port->open) {
441b62c1 1620 dbg("%s - port not opened", __func__);
3f542974
PS		 1621 return;
1622 }
1623
1624 dbg("%s", "Entering .......... \n");
1625
3f542974
PS		 1626 /* if we are implementing XON/XOFF, send the start character */
1627 if (I_IXOFF(tty)) {
1628 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1629 status = mos7840_write(tty, port, &start_char, 1);
1630 if (status <= 0)
3f542974 1631 return;
3f542974
PS		 1632 }
1633
1634 /* if we are implementing RTS/CTS, toggle that line */
1635 if (tty->termios->c_cflag & CRTSCTS) {
1636 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1637 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1638 mos7840_port->shadowMCR);
95da310e 1639 if (status < 0)
3f542974 1640 return;
3f542974 1641 }
3f542974
PS		 1642}
1643
95da310e 1644static int mos7840_tiocmget(struct tty_struct *tty, struct file *file)
3f542974 1645{
95da310e 1646 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1647 struct moschip_port *mos7840_port;
1648 unsigned int result;
1649 __u16 msr;
1650 __u16 mcr;
880af9db 1651 int status;
3f542974
PS		 1652 mos7840_port = mos7840_get_port_private(port);
1653
441b62c1 1654 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1655
1656 if (mos7840_port == NULL)
1657 return -ENODEV;
1658
1659 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1660 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1661 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1662 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1663 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1664 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1665 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1666 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1667 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1668
441b62c1 1669 dbg("%s - 0x%04X", __func__, result);
3f542974
PS		 1670
1671 return result;
1672}
1673
95da310e 1674static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
3f542974
PS		 1675 unsigned int set, unsigned int clear)
1676{
95da310e 1677 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1678 struct moschip_port *mos7840_port;
1679 unsigned int mcr;
87521c46 1680 int status;
3f542974 1681
441b62c1 1682 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1683
1684 mos7840_port = mos7840_get_port_private(port);
1685
1686 if (mos7840_port == NULL)
1687 return -ENODEV;
1688
e2984494 1689 /* FIXME: What locks the port registers ? */
3f542974
PS		 1690 mcr = mos7840_port->shadowMCR;
1691 if (clear & TIOCM_RTS)
1692 mcr &= ~MCR_RTS;
1693 if (clear & TIOCM_DTR)
1694 mcr &= ~MCR_DTR;
1695 if (clear & TIOCM_LOOP)
1696 mcr &= ~MCR_LOOPBACK;
1697
1698 if (set & TIOCM_RTS)
1699 mcr |= MCR_RTS;
1700 if (set & TIOCM_DTR)
1701 mcr |= MCR_DTR;
1702 if (set & TIOCM_LOOP)
1703 mcr |= MCR_LOOPBACK;
1704
1705 mos7840_port->shadowMCR = mcr;
1706
3f542974
PS		 1707 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1708 if (status < 0) {
1709 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
87521c46 1710 return status;
3f542974
PS		 1711 }
1712
1713 return 0;
1714}
1715
1716/*****************************************************************************
1717 * mos7840_calc_baud_rate_divisor
1718 * this function calculates the proper baud rate divisor for the specified
1719 * baud rate.
1720 *****************************************************************************/
1721static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
880af9db 1722 __u16 *clk_sel_val)
3f542974
PS		 1723{
1724
441b62c1 1725 dbg("%s - %d", __func__, baudRate);
3f542974
PS		 1726
1727 if (baudRate <= 115200) {
1728 *divisor = 115200 / baudRate;
1729 *clk_sel_val = 0x0;
1730 }
1731 if ((baudRate > 115200) && (baudRate <= 230400)) {
1732 *divisor = 230400 / baudRate;
1733 *clk_sel_val = 0x10;
1734 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1735 *divisor = 403200 / baudRate;
1736 *clk_sel_val = 0x20;
1737 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1738 *divisor = 460800 / baudRate;
1739 *clk_sel_val = 0x30;
1740 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1741 *divisor = 806400 / baudRate;
1742 *clk_sel_val = 0x40;
1743 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1744 *divisor = 921600 / baudRate;
1745 *clk_sel_val = 0x50;
1746 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1747 *divisor = 1572864 / baudRate;
1748 *clk_sel_val = 0x60;
1749 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1750 *divisor = 3145728 / baudRate;
1751 *clk_sel_val = 0x70;
1752 }
1753 return 0;
1754
1755#ifdef NOTMCS7840
1756
1757 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1758 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1759 *divisor = mos7840_divisor_table[i].Divisor;
1760 return 0;
1761 }
1762 }
1763
1764 /* After trying for all the standard baud rates *
1765 * Try calculating the divisor for this baud rate */
1766
1767 if (baudrate > 75 && baudrate < 230400) {
1768 /* get the divisor */
1769 custom = (__u16) (230400L / baudrate);
1770
1771 /* Check for round off */
1772 round1 = (__u16) (2304000L / baudrate);
1773 round = (__u16) (round1 - (custom * 10));
880af9db 1774 if (round > 4)
3f542974 1775 custom++;
3f542974
PS		 1776 *divisor = custom;
1777
1778 dbg(" Baud %d = %d\n", baudrate, custom);
1779 return 0;
1780 }
1781
1782 dbg("%s\n", " Baud calculation Failed...");
1783 return -1;
1784#endif
1785}
1786
1787/*****************************************************************************
1788 * mos7840_send_cmd_write_baud_rate
1789 * this function sends the proper command to change the baud rate of the
1790 * specified port.
1791 *****************************************************************************/
1792
1793static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1794 int baudRate)
1795{
1796 int divisor = 0;
1797 int status;
1798 __u16 Data;
1799 unsigned char number;
1800 __u16 clk_sel_val;
1801 struct usb_serial_port *port;
1802
1803 if (mos7840_port == NULL)
1804 return -1;
1805
1806 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 1807 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1808 dbg("%s", "Invalid port \n");
1809 return -1;
1810 }
1811
441b62c1 1812 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
3f542974
PS		 1813 dbg("%s", "Invalid Serial \n");
1814 return -1;
1815 }
1816
1817 dbg("%s", "Entering .......... \n");
1818
1819 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1820
441b62c1 1821 dbg("%s - port = %d, baud = %d", __func__,
3f542974 1822 mos7840_port->port->number, baudRate);
880af9db 1823 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1824 if (baudRate > 115200) {
1825#ifdef HW_flow_control
880af9db
AC		 1826 /* NOTE: need to see the pther register to modify */
1827 /* setting h/w flow control bit to 1 */
3f542974
PS		 1828 Data = 0x2b;
1829 mos7840_port->shadowMCR = Data;
880af9db
AC		 1830 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1831 Data);
3f542974
PS		 1832 if (status < 0) {
1833 dbg("Writing spreg failed in set_serial_baud\n");
1834 return -1;
1835 }
1836#endif
1837
1838 } else {
1839#ifdef HW_flow_control
880af9db 1840 / *setting h/w flow control bit to 0 */
3f542974
PS		 1841 Data = 0xb;
1842 mos7840_port->shadowMCR = Data;
880af9db
AC		 1843 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1844 Data);
3f542974
PS		 1845 if (status < 0) {
1846 dbg("Writing spreg failed in set_serial_baud\n");
1847 return -1;
1848 }
1849#endif
1850
1851 }
1852
880af9db 1853 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1854 clk_sel_val = 0x0;
1855 Data = 0x0;
880af9db 1856 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
3f542974 1857 &clk_sel_val);
880af9db
AC		 1858 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1859 &Data);
3f542974
PS		 1860 if (status < 0) {
1861 dbg("reading spreg failed in set_serial_baud\n");
1862 return -1;
1863 }
1864 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1865 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1866 Data);
3f542974
PS		 1867 if (status < 0) {
1868 dbg("Writing spreg failed in set_serial_baud\n");
1869 return -1;
1870 }
1871 /* Calculate the Divisor */
1872
1873 if (status) {
194343d9 1874 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1875 return status;
1876 }
1877 /* Enable access to divisor latch */
1878 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1879 mos7840_port->shadowLCR = Data;
1880 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1881
1882 /* Write the divisor */
1883 Data = (unsigned char)(divisor & 0xff);
1884 dbg("set_serial_baud Value to write DLL is %x\n", Data);
1885 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1886
1887 Data = (unsigned char)((divisor & 0xff00) >> 8);
1888 dbg("set_serial_baud Value to write DLM is %x\n", Data);
1889 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1890
1891 /* Disable access to divisor latch */
1892 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1893 mos7840_port->shadowLCR = Data;
1894 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1895
1896 }
3f542974
PS		 1897 return status;
1898}
1899
1900/*****************************************************************************
1901 * mos7840_change_port_settings
1902 * This routine is called to set the UART on the device to match
1903 * the specified new settings.
1904 *****************************************************************************/
1905
95da310e
AC		 1906static void mos7840_change_port_settings(struct tty_struct *tty,
1907 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1908{
3f542974
PS		 1909 int baud;
1910 unsigned cflag;
1911 unsigned iflag;
1912 __u8 lData;
1913 __u8 lParity;
1914 __u8 lStop;
1915 int status;
1916 __u16 Data;
1917 struct usb_serial_port *port;
1918 struct usb_serial *serial;
1919
1920 if (mos7840_port == NULL)
1921 return;
1922
1923 port = (struct usb_serial_port *)mos7840_port->port;
1924
441b62c1 1925 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 1926 dbg("%s", "Invalid port \n");
1927 return;
1928 }
1929
441b62c1 1930 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
3f542974
PS		 1931 dbg("%s", "Invalid Serial \n");
1932 return;
1933 }
1934
1935 serial = port->serial;
1936
441b62c1 1937 dbg("%s - port %d", __func__, mos7840_port->port->number);
3f542974
PS		 1938
1939 if (!mos7840_port->open) {
441b62c1 1940 dbg("%s - port not opened", __func__);
3f542974
PS		 1941 return;
1942 }
1943
3f542974
PS		 1944 dbg("%s", "Entering .......... \n");
1945
1946 lData = LCR_BITS_8;
1947 lStop = LCR_STOP_1;
1948 lParity = LCR_PAR_NONE;
1949
1950 cflag = tty->termios->c_cflag;
1951 iflag = tty->termios->c_iflag;
1952
1953 /* Change the number of bits */
1954 if (cflag & CSIZE) {
1955 switch (cflag & CSIZE) {
1956 case CS5:
1957 lData = LCR_BITS_5;
1958 break;
1959
1960 case CS6:
1961 lData = LCR_BITS_6;
1962 break;
1963
1964 case CS7:
1965 lData = LCR_BITS_7;
1966 break;
1967 default:
1968 case CS8:
1969 lData = LCR_BITS_8;
1970 break;
1971 }
1972 }
1973 /* Change the Parity bit */
1974 if (cflag & PARENB) {
1975 if (cflag & PARODD) {
1976 lParity = LCR_PAR_ODD;
441b62c1 1977 dbg("%s - parity = odd", __func__);
3f542974
PS		 1978 } else {
1979 lParity = LCR_PAR_EVEN;
441b62c1 1980 dbg("%s - parity = even", __func__);
3f542974
PS		 1981 }
1982
1983 } else {
441b62c1 1984 dbg("%s - parity = none", __func__);
3f542974
PS		 1985 }
1986
880af9db 1987 if (cflag & CMSPAR)
3f542974 1988 lParity = lParity | 0x20;
3f542974
PS		 1989
1990 /* Change the Stop bit */
1991 if (cflag & CSTOPB) {
1992 lStop = LCR_STOP_2;
441b62c1 1993 dbg("%s - stop bits = 2", __func__);
3f542974
PS		 1994 } else {
1995 lStop = LCR_STOP_1;
441b62c1 1996 dbg("%s - stop bits = 1", __func__);
3f542974
PS		 1997 }
1998
1999 /* Update the LCR with the correct value */
2000 mos7840_port->shadowLCR &=
2001 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2002 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2003
2004 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
2005 mos7840_port->shadowLCR);
2006 /* Disable Interrupts */
2007 Data = 0x00;
2008 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2009
2010 Data = 0x00;
2011 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2012
2013 Data = 0xcf;
2014 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2015
2016 /* Send the updated LCR value to the mos7840 */
2017 Data = mos7840_port->shadowLCR;
2018
2019 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2020
2021 Data = 0x00b;
2022 mos7840_port->shadowMCR = Data;
2023 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2024 Data = 0x00b;
2025 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2026
2027 /* set up the MCR register and send it to the mos7840 */
2028
2029 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 2030 if (cflag & CBAUD)
3f542974 2031 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 2032
880af9db 2033 if (cflag & CRTSCTS)
3f542974 2034 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 2035 else
3f542974 2036 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 2037
2038 Data = mos7840_port->shadowMCR;
2039 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2040
2041 /* Determine divisor based on baud rate */
2042 baud = tty_get_baud_rate(tty);
2043
2044 if (!baud) {
2045 /* pick a default, any default... */
2046 dbg("%s\n", "Picked default baud...");
2047 baud = 9600;
2048 }
2049
441b62c1 2050 dbg("%s - baud rate = %d", __func__, baud);
3f542974
PS		 2051 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2052
2053 /* Enable Interrupts */
2054 Data = 0x0c;
2055 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2056
50de36f7 2057 if (mos7840_port->read_urb_busy == false) {
3f542974 2058 mos7840_port->read_urb->dev = serial->dev;
50de36f7 2059 mos7840_port->read_urb_busy = true;
3f542974 2060 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
3f542974 2061 if (status) {
50de36f7 2062 dbg("usb_submit_urb(read bulk) failed, status = %d",
3f542974 2063 status);
50de36f7 2064 mos7840_port->read_urb_busy = false;
3f542974
PS		 2065 }
2066 }
2067 wake_up(&mos7840_port->delta_msr_wait);
2068 mos7840_port->delta_msr_cond = 1;
2069 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
2070 mos7840_port->shadowLCR);
2071
2072 return;
2073}
2074
2075/*****************************************************************************
2076 * mos7840_set_termios
2077 * this function is called by the tty driver when it wants to change
2078 * the termios structure
2079 *****************************************************************************/
2080
95da310e
AC		 2081static void mos7840_set_termios(struct tty_struct *tty,
2082 struct usb_serial_port *port,
606d099c 2083 struct ktermios *old_termios)
3f542974
PS		 2084{
2085 int status;
2086 unsigned int cflag;
2087 struct usb_serial *serial;
2088 struct moschip_port *mos7840_port;
3f542974 2089 dbg("mos7840_set_termios: START\n");
441b62c1 2090 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2091 dbg("%s", "Invalid port \n");
2092 return;
2093 }
2094
2095 serial = port->serial;
2096
441b62c1 2097 if (mos7840_serial_paranoia_check(serial, __func__)) {
3f542974
PS		 2098 dbg("%s", "Invalid Serial \n");
2099 return;
2100 }
2101
2102 mos7840_port = mos7840_get_port_private(port);
2103
2104 if (mos7840_port == NULL)
2105 return;
2106
3f542974 2107 if (!mos7840_port->open) {
441b62c1 2108 dbg("%s - port not opened", __func__);
3f542974
PS		 2109 return;
2110 }
2111
2112 dbg("%s\n", "setting termios - ");
2113
2114 cflag = tty->termios->c_cflag;
2115
441b62c1 2116 dbg("%s - clfag %08x iflag %08x", __func__,
3f542974 2117 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
441b62c1 2118 dbg("%s - old clfag %08x old iflag %08x", __func__,
3d3ddce5 2119 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
441b62c1 2120 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 2121
2122 /* change the port settings to the new ones specified */
2123
95da310e 2124 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2125
2126 if (!mos7840_port->read_urb) {
2127 dbg("%s", "URB KILLED !!!!!\n");
2128 return;
2129 }
2130
50de36f7 2131 if (mos7840_port->read_urb_busy == false) {
3f542974 2132 mos7840_port->read_urb->dev = serial->dev;
50de36f7 2133 mos7840_port->read_urb_busy = true;
3f542974
PS		 2134 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2135 if (status) {
50de36f7 2136 dbg("usb_submit_urb(read bulk) failed, status = %d",
3f542974 2137 status);
50de36f7 2138 mos7840_port->read_urb_busy = false;
3f542974
PS		 2139 }
2140 }
2141 return;
2142}
2143
2144/*****************************************************************************
2145 * mos7840_get_lsr_info - get line status register info
2146 *
2147 * Purpose: Let user call ioctl() to get info when the UART physically
2148 * is emptied. On bus types like RS485, the transmitter must
2149 * release the bus after transmitting. This must be done when
2150 * the transmit shift register is empty, not be done when the
2151 * transmit holding register is empty. This functionality
2152 * allows an RS485 driver to be written in user space.
2153 *****************************************************************************/
2154
95da310e 2155static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2156 unsigned int __user *value)
3f542974
PS		 2157{
2158 int count;
2159 unsigned int result = 0;
2160
95da310e 2161 count = mos7840_chars_in_buffer(tty);
3f542974 2162 if (count == 0) {
441b62c1 2163 dbg("%s -- Empty", __func__);
3f542974
PS		 2164 result = TIOCSER_TEMT;
2165 }
2166
2167 if (copy_to_user(value, &result, sizeof(int)))
2168 return -EFAULT;
2169 return 0;
2170}
2171
3f542974
PS		 2172/*****************************************************************************
2173 * mos7840_set_modem_info
2174 * function to set modem info
2175 *****************************************************************************/
2176
95da310e
AC		 2177/* FIXME: Should be using the model control hooks */
2178
3f542974 2179static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
97c4965d 2180 unsigned int cmd, unsigned int __user *value)
3f542974
PS		 2181{
2182 unsigned int mcr;
2183 unsigned int arg;
2184 __u16 Data;
2185 int status;
2186 struct usb_serial_port *port;
2187
2188 if (mos7840_port == NULL)
2189 return -1;
2190
2191 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 2192 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2193 dbg("%s", "Invalid port \n");
2194 return -1;
2195 }
2196
2197 mcr = mos7840_port->shadowMCR;
2198
2199 if (copy_from_user(&arg, value, sizeof(int)))
2200 return -EFAULT;
2201
2202 switch (cmd) {
2203 case TIOCMBIS:
2204 if (arg & TIOCM_RTS)
2205 mcr |= MCR_RTS;
2206 if (arg & TIOCM_DTR)
2207 mcr |= MCR_RTS;
2208 if (arg & TIOCM_LOOP)
2209 mcr |= MCR_LOOPBACK;
2210 break;
2211
2212 case TIOCMBIC:
2213 if (arg & TIOCM_RTS)
2214 mcr &= ~MCR_RTS;
2215 if (arg & TIOCM_DTR)
2216 mcr &= ~MCR_RTS;
2217 if (arg & TIOCM_LOOP)
2218 mcr &= ~MCR_LOOPBACK;
2219 break;
2220
2221 case TIOCMSET:
2222 /* turn off the RTS and DTR and LOOPBACK
2223 * and then only turn on what was asked to */
2224 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK);
2225 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0);
2226 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0);
2227 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0);
2228 break;
2229 }
2230
6b447f04 2231 lock_kernel();
3f542974
PS		 2232 mos7840_port->shadowMCR = mcr;
2233
2234 Data = mos7840_port->shadowMCR;
3f542974 2235 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
6b447f04 2236 unlock_kernel();
3f542974
PS		 2237 if (status < 0) {
2238 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
2239 return -1;
2240 }
2241
2242 return 0;
2243}
2244
2245/*****************************************************************************
2246 * mos7840_get_modem_info
2247 * function to get modem info
2248 *****************************************************************************/
2249
2250static int mos7840_get_modem_info(struct moschip_port *mos7840_port,
97c4965d 2251 unsigned int __user *value)
3f542974
PS		 2252{
2253 unsigned int result = 0;
2254 __u16 msr;
2255 unsigned int mcr = mos7840_port->shadowMCR;
880af9db 2256 mos7840_get_uart_reg(mos7840_port->port,
95da310e 2257 MODEM_STATUS_REGISTER, &msr);
3f542974
PS		 2258 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
2259 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
2260 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
2261 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */
2262 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
2263 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
2264
441b62c1 2265 dbg("%s -- %x", __func__, result);
3f542974
PS		 2266
2267 if (copy_to_user(value, &result, sizeof(int)))
2268 return -EFAULT;
2269 return 0;
2270}
2271
2272/*****************************************************************************
2273 * mos7840_get_serial_info
2274 * function to get information about serial port
2275 *****************************************************************************/
2276
2277static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2278 struct serial_struct __user *retinfo)
3f542974
PS		 2279{
2280 struct serial_struct tmp;
2281
2282 if (mos7840_port == NULL)
2283 return -1;
2284
2285 if (!retinfo)
2286 return -EFAULT;
2287
2288 memset(&tmp, 0, sizeof(tmp));
2289
2290 tmp.type = PORT_16550A;
2291 tmp.line = mos7840_port->port->serial->minor;
2292 tmp.port = mos7840_port->port->number;
2293 tmp.irq = 0;
2294 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2295 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2296 tmp.baud_base = 9600;
2297 tmp.close_delay = 5 * HZ;
2298 tmp.closing_wait = 30 * HZ;
2299
2300 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2301 return -EFAULT;
2302 return 0;
2303}
2304
2305/*****************************************************************************
2306 * SerialIoctl
2307 * this function handles any ioctl calls to the driver
2308 *****************************************************************************/
2309
95da310e 2310static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
3f542974
PS		 2311 unsigned int cmd, unsigned long arg)
2312{
95da310e 2313 struct usb_serial_port *port = tty->driver_data;
97c4965d 2314 void __user *argp = (void __user *)arg;
3f542974 2315 struct moschip_port *mos7840_port;
3f542974
PS		 2316
2317 struct async_icount cnow;
2318 struct async_icount cprev;
2319 struct serial_icounter_struct icount;
2320 int mosret = 0;
3f542974 2321
441b62c1 2322 if (mos7840_port_paranoia_check(port, __func__)) {
3f542974
PS		 2323 dbg("%s", "Invalid port \n");
2324 return -1;
2325 }
2326
2327 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2328
2329 if (mos7840_port == NULL)
2330 return -1;
2331
441b62c1 2332 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
3f542974
PS		 2333
2334 switch (cmd) {
2335 /* return number of bytes available */
2336
3f542974 2337 case TIOCSERGETLSR:
441b62c1 2338 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
95da310e 2339 return mos7840_get_lsr_info(tty, argp);
3f542974
PS		 2340 return 0;
2341
95da310e 2342 /* FIXME: use the modem hooks and remove this */
3f542974
PS		 2343 case TIOCMBIS:
2344 case TIOCMBIC:
2345 case TIOCMSET:
441b62c1 2346 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__,
3f542974
PS		 2347 port->number);
2348 mosret =
97c4965d 2349 mos7840_set_modem_info(mos7840_port, cmd, argp);
3f542974
PS		 2350 return mosret;
2351
2352 case TIOCMGET:
441b62c1 2353 dbg("%s (%d) TIOCMGET", __func__, port->number);
97c4965d 2354 return mos7840_get_modem_info(mos7840_port, argp);
3f542974
PS		 2355
2356 case TIOCGSERIAL:
441b62c1 2357 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
97c4965d 2358 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2359
2360 case TIOCSSERIAL:
441b62c1 2361 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
3f542974
PS		 2362 break;
2363
2364 case TIOCMIWAIT:
441b62c1 2365 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
3f542974
PS		 2366 cprev = mos7840_port->icount;
2367 while (1) {
880af9db 2368 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974
PS		 2369 mos7840_port->delta_msr_cond = 0;
2370 wait_event_interruptible(mos7840_port->delta_msr_wait,
2371 (mos7840_port->
2372 delta_msr_cond == 1));
2373
2374 /* see if a signal did it */
2375 if (signal_pending(current))
2376 return -ERESTARTSYS;
2377 cnow = mos7840_port->icount;
0de9a702 2378 smp_rmb();
3f542974
PS		 2379 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2380 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2381 return -EIO; /* no change => error */
2382 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2383 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2384 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2385 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2386 return 0;
2387 }
2388 cprev = cnow;
2389 }
2390 /* NOTREACHED */
2391 break;
2392
2393 case TIOCGICOUNT:
2394 cnow = mos7840_port->icount;
0de9a702 2395 smp_rmb();
3f542974
PS		 2396 icount.cts = cnow.cts;
2397 icount.dsr = cnow.dsr;
2398 icount.rng = cnow.rng;
2399 icount.dcd = cnow.dcd;
2400 icount.rx = cnow.rx;
2401 icount.tx = cnow.tx;
2402 icount.frame = cnow.frame;
2403 icount.overrun = cnow.overrun;
2404 icount.parity = cnow.parity;
2405 icount.brk = cnow.brk;
2406 icount.buf_overrun = cnow.buf_overrun;
2407
441b62c1 2408 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
3f542974 2409 port->number, icount.rx, icount.tx);
97c4965d 2410 if (copy_to_user(argp, &icount, sizeof(icount)))
3f542974
PS		 2411 return -EFAULT;
2412 return 0;
3f542974
PS		 2413 default:
2414 break;
2415 }
3f542974
PS		 2416 return -ENOIOCTLCMD;
2417}
2418
2419static int mos7840_calc_num_ports(struct usb_serial *serial)
2420{
0de9a702 2421 int mos7840_num_ports = 0;
3f542974
PS		 2422
2423 dbg("numberofendpoints: %d \n",
2424 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
2425 dbg("numberofendpoints: %d \n",
2426 (int)serial->interface->altsetting->desc.bNumEndpoints);
2427 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
0de9a702 2428 mos7840_num_ports = serial->num_ports = 2;
3f542974 2429 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
0de9a702
ON		 2430 serial->num_bulk_in = 4;
2431 serial->num_bulk_out = 4;
2432 mos7840_num_ports = serial->num_ports = 4;
3f542974
PS		 2433 }
2434
2435 return mos7840_num_ports;
2436}
2437
2438/****************************************************************************
2439 * mos7840_startup
2440 ****************************************************************************/
2441
2442static int mos7840_startup(struct usb_serial *serial)
2443{
2444 struct moschip_port *mos7840_port;
2445 struct usb_device *dev;
2446 int i, status;
2447
2448 __u16 Data;
2449 dbg("%s \n", " mos7840_startup :entering..........");
2450
2451 if (!serial) {
2452 dbg("%s\n", "Invalid Handler");
2453 return -1;
2454 }
2455
2456 dev = serial->dev;
2457
2458 dbg("%s\n", "Entering...");
2459
2460 /* we set up the pointers to the endpoints in the mos7840_open *
2461 * function, as the structures aren't created yet. */
2462
2463 /* set up port private structures */
2464 for (i = 0; i < serial->num_ports; ++i) {
7ac9da10 2465 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
3f542974 2466 if (mos7840_port == NULL) {
194343d9 2467 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
0de9a702
ON		 2468 status = -ENOMEM;
2469 i--; /* don't follow NULL pointer cleaning up */
2470 goto error;
3f542974 2471 }
3f542974 2472
880af9db
AC		 2473 /* Initialize all port interrupt end point to port 0 int
2474 * endpoint. Our device has only one interrupt end point
2475 * common to all port */
3f542974
PS		 2476
2477 mos7840_port->port = serial->port[i];
2478 mos7840_set_port_private(serial->port[i], mos7840_port);
0de9a702 2479 spin_lock_init(&mos7840_port->pool_lock);
3f542974 2480
37768adf
TC		 2481 /* minor is not initialised until later by
2482 * usb-serial.c:get_free_serial() and cannot therefore be used
2483 * to index device instances */
2484 mos7840_port->port_num = i + 1;
2485 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2486 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2487 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2488 dbg ("serial->minor = %d", serial->minor);
3f542974
PS		 2489
2490 if (mos7840_port->port_num == 1) {
2491 mos7840_port->SpRegOffset = 0x0;
2492 mos7840_port->ControlRegOffset = 0x1;
2493 mos7840_port->DcrRegOffset = 0x4;
2494 } else if ((mos7840_port->port_num == 2)
0de9a702 2495 && (serial->num_ports == 4)) {
3f542974
PS		 2496 mos7840_port->SpRegOffset = 0x8;
2497 mos7840_port->ControlRegOffset = 0x9;
2498 mos7840_port->DcrRegOffset = 0x16;
2499 } else if ((mos7840_port->port_num == 2)
0de9a702 2500 && (serial->num_ports == 2)) {
3f542974
PS		 2501 mos7840_port->SpRegOffset = 0xa;
2502 mos7840_port->ControlRegOffset = 0xb;
2503 mos7840_port->DcrRegOffset = 0x19;
2504 } else if ((mos7840_port->port_num == 3)
0de9a702 2505 && (serial->num_ports == 4)) {
3f542974
PS		 2506 mos7840_port->SpRegOffset = 0xa;
2507 mos7840_port->ControlRegOffset = 0xb;
2508 mos7840_port->DcrRegOffset = 0x19;
2509 } else if ((mos7840_port->port_num == 4)
0de9a702 2510 && (serial->num_ports == 4)) {
3f542974
PS		 2511 mos7840_port->SpRegOffset = 0xc;
2512 mos7840_port->ControlRegOffset = 0xd;
2513 mos7840_port->DcrRegOffset = 0x1c;
2514 }
2515 mos7840_dump_serial_port(mos7840_port);
3f542974
PS		 2516 mos7840_set_port_private(serial->port[i], mos7840_port);
2517
880af9db
AC		 2518 /* enable rx_disable bit in control register */
2519 status = mos7840_get_reg_sync(serial->port[i],
2520 mos7840_port->ControlRegOffset, &Data);
3f542974
PS		 2521 if (status < 0) {
2522 dbg("Reading ControlReg failed status-0x%x\n", status);
2523 break;
2524 } else
2525 dbg("ControlReg Reading success val is %x, status%d\n",
2526 Data, status);
880af9db
AC		 2527 Data |= 0x08; /* setting driver done bit */
2528 Data |= 0x04; /* sp1_bit to have cts change reflect in
2529 modem status reg */
3f542974 2530
880af9db
AC		 2531 /* Data |= 0x20; //rx_disable bit */
2532 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2533 mos7840_port->ControlRegOffset, Data);
2534 if (status < 0) {
2535 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2536 break;
2537 } else
2538 dbg("ControlReg Writing success(rx_disable) status%d\n",
2539 status);
2540
880af9db
AC		 2541 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2542 and 0x24 in DCR3 */
3f542974 2543 Data = 0x01;
880af9db
AC		 2544 status = mos7840_set_reg_sync(serial->port[i],
2545 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
3f542974
PS		 2546 if (status < 0) {
2547 dbg("Writing DCR0 failed status-0x%x\n", status);
2548 break;
2549 } else
2550 dbg("DCR0 Writing success status%d\n", status);
2551
2552 Data = 0x05;
880af9db
AC		 2553 status = mos7840_set_reg_sync(serial->port[i],
2554 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
3f542974
PS		 2555 if (status < 0) {
2556 dbg("Writing DCR1 failed status-0x%x\n", status);
2557 break;
2558 } else
2559 dbg("DCR1 Writing success status%d\n", status);
2560
2561 Data = 0x24;
880af9db
AC		 2562 status = mos7840_set_reg_sync(serial->port[i],
2563 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
3f542974
PS		 2564 if (status < 0) {
2565 dbg("Writing DCR2 failed status-0x%x\n", status);
2566 break;
2567 } else
2568 dbg("DCR2 Writing success status%d\n", status);
2569
880af9db 2570 /* write values in clkstart0x0 and clkmulti 0x20 */
3f542974 2571 Data = 0x0;
880af9db 2572 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2573 CLK_START_VALUE_REGISTER, Data);
2574 if (status < 0) {
2575 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2576 break;
2577 } else
2578 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2579
2580 Data = 0x20;
880af9db
AC		 2581 status = mos7840_set_reg_sync(serial->port[i],
2582 CLK_MULTI_REGISTER, Data);
3f542974
PS		 2583 if (status < 0) {
2584 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
2585 status);
0de9a702 2586 goto error;
3f542974
PS		 2587 } else
2588 dbg("CLK_MULTI_REGISTER Writing success status%d\n",
2589 status);
2590
880af9db 2591 /* write value 0x0 to scratchpad register */
3f542974 2592 Data = 0x00;
880af9db
AC		 2593 status = mos7840_set_uart_reg(serial->port[i],
2594 SCRATCH_PAD_REGISTER, Data);
3f542974
PS		 2595 if (status < 0) {
2596 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
2597 status);
2598 break;
2599 } else
2600 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
2601 status);
2602
880af9db 2603 /* Zero Length flag register */
3f542974 2604 if ((mos7840_port->port_num != 1)
0de9a702 2605 && (serial->num_ports == 2)) {
3f542974
PS		 2606
2607 Data = 0xff;
3f542974 2608 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2609 (__u16) (ZLP_REG1 +
2610 ((__u16)mos7840_port->port_num)), Data);
3f542974
PS		 2611 dbg("ZLIP offset%x\n",
2612 (__u16) (ZLP_REG1 +
880af9db 2613 ((__u16) mos7840_port->port_num)));
3f542974
PS		 2614 if (status < 0) {
2615 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2616 i + 2, status);
2617 break;
2618 } else
2619 dbg("ZLP_REG%d Writing success status%d\n",
2620 i + 2, status);
2621 } else {
2622 Data = 0xff;
3f542974 2623 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2624 (__u16) (ZLP_REG1 +
2625 ((__u16)mos7840_port->port_num) - 0x1), Data);
3f542974
PS		 2626 dbg("ZLIP offset%x\n",
2627 (__u16) (ZLP_REG1 +
2628 ((__u16) mos7840_port->port_num) - 0x1));
2629 if (status < 0) {
2630 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2631 i + 1, status);
2632 break;
2633 } else
2634 dbg("ZLP_REG%d Writing success status%d\n",
2635 i + 1, status);
2636
2637 }
0de9a702 2638 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974 2639 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
880af9db
AC		 2640 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2641 GFP_KERNEL);
2642 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2643 !mos7840_port->dr) {
0de9a702
ON		 2644 status = -ENOMEM;
2645 goto error;
2646 }
3f542974
PS		 2647 }
2648
880af9db 2649 /* Zero Length flag enable */
3f542974 2650 Data = 0x0f;
3f542974
PS		 2651 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2652 if (status < 0) {
2653 dbg("Writing ZLP_REG5 failed status-0x%x\n", status);
7ced46c3 2654 goto error;
3f542974
PS		 2655 } else
2656 dbg("ZLP_REG5 Writing success status%d\n", status);
2657
2658 /* setting configuration feature to one */
2659 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
97c4965d 2660 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
3f542974 2661 return 0;
0de9a702
ON		 2662error:
2663 for (/* nothing */; i >= 0; i--) {
2664 mos7840_port = mos7840_get_port_private(serial->port[i]);
2665
2666 kfree(mos7840_port->dr);
2667 kfree(mos7840_port->ctrl_buf);
2668 usb_free_urb(mos7840_port->control_urb);
2669 kfree(mos7840_port);
2670 serial->port[i] = NULL;
2671 }
2672 return status;
3f542974
PS		 2673}
2674
2675/****************************************************************************
2676 * mos7840_shutdown
2677 * This function is called whenever the device is removed from the usb bus.
2678 ****************************************************************************/
2679
2680static void mos7840_shutdown(struct usb_serial *serial)
2681{
2682 int i;
0de9a702 2683 unsigned long flags;
3f542974
PS		 2684 struct moschip_port *mos7840_port;
2685 dbg("%s \n", " shutdown :entering..........");
2686
2687 if (!serial) {
2688 dbg("%s", "Invalid Handler \n");
2689 return;
2690 }
2691
880af9db 2692 /* check for the ports to be closed,close the ports and disconnect */
3f542974
PS		 2693
2694 /* free private structure allocated for serial port *
2695 * stop reads and writes on all ports */
2696
2697 for (i = 0; i < serial->num_ports; ++i) {
2698 mos7840_port = mos7840_get_port_private(serial->port[i]);
37768adf
TC		 2699 dbg ("mos7840_port %d = %p", i, mos7840_port);
2700 if (mos7840_port) {
2701 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2702 mos7840_port->zombie = 1;
2703 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
2704 usb_kill_urb(mos7840_port->control_urb);
2705 kfree(mos7840_port->ctrl_buf);
2706 kfree(mos7840_port->dr);
2707 kfree(mos7840_port);
2708 }
3f542974
PS		 2709 mos7840_set_port_private(serial->port[i], NULL);
2710 }
2711
2712 dbg("%s\n", "Thank u :: ");
2713
2714}
2715
d9b1b787
JH		 2716static struct usb_driver io_driver = {
2717 .name = "mos7840",
2718 .probe = usb_serial_probe,
2719 .disconnect = usb_serial_disconnect,
2720 .id_table = moschip_id_table_combined,
2721 .no_dynamic_id = 1,
2722};
2723
3f542974
PS		 2724static struct usb_serial_driver moschip7840_4port_device = {
2725 .driver = {
2726 .owner = THIS_MODULE,
2727 .name = "mos7840",
2728 },
2729 .description = DRIVER_DESC,
d9b1b787 2730 .usb_driver = &io_driver,
3f542974 2731 .id_table = moschip_port_id_table,
3f542974 2732 .num_ports = 4,
3f542974
PS		 2733 .open = mos7840_open,
2734 .close = mos7840_close,
2735 .write = mos7840_write,
2736 .write_room = mos7840_write_room,
2737 .chars_in_buffer = mos7840_chars_in_buffer,
2738 .throttle = mos7840_throttle,
2739 .unthrottle = mos7840_unthrottle,
2740 .calc_num_ports = mos7840_calc_num_ports,
2741#ifdef MCSSerialProbe
2742 .probe = mos7840_serial_probe,
2743#endif
2744 .ioctl = mos7840_ioctl,
2745 .set_termios = mos7840_set_termios,
2746 .break_ctl = mos7840_break,
2747 .tiocmget = mos7840_tiocmget,
2748 .tiocmset = mos7840_tiocmset,
2749 .attach = mos7840_startup,
2750 .shutdown = mos7840_shutdown,
2751 .read_bulk_callback = mos7840_bulk_in_callback,
2752 .read_int_callback = mos7840_interrupt_callback,
2753};
2754
3f542974
PS		 2755/****************************************************************************
2756 * moschip7840_init
2757 * This is called by the module subsystem, or on startup to initialize us
2758 ****************************************************************************/
2759static int __init moschip7840_init(void)
2760{
2761 int retval;
2762
2763 dbg("%s \n", " mos7840_init :entering..........");
2764
2765 /* Register with the usb serial */
2766 retval = usb_serial_register(&moschip7840_4port_device);
2767
2768 if (retval)
2769 goto failed_port_device_register;
2770
2771 dbg("%s\n", "Entring...");
c197a8db
GKH		 2772 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2773 DRIVER_DESC "\n");
3f542974
PS		 2774
2775 /* Register with the usb */
2776 retval = usb_register(&io_driver);
3f542974
PS		 2777 if (retval == 0) {
2778 dbg("%s\n", "Leaving...");
2779 return 0;
2780 }
3f542974 2781 usb_serial_deregister(&moschip7840_4port_device);
880af9db 2782failed_port_device_register:
3f542974
PS		 2783 return retval;
2784}
2785
2786/****************************************************************************
2787 * moschip7840_exit
2788 * Called when the driver is about to be unloaded.
2789 ****************************************************************************/
2790static void __exit moschip7840_exit(void)
2791{
2792
2793 dbg("%s \n", " mos7840_exit :entering..........");
2794
2795 usb_deregister(&io_driver);
2796
2797 usb_serial_deregister(&moschip7840_4port_device);
2798
2799 dbg("%s\n", "Entring...");
2800}
2801
2802module_init(moschip7840_init);
2803module_exit(moschip7840_exit);
2804
2805/* Module information */
2806MODULE_DESCRIPTION(DRIVER_DESC);
2807MODULE_LICENSE("GPL");
2808
2809module_param(debug, bool, S_IRUGO | S_IWUSR);
2810MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux kernel - Deliverables
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