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drivers/usb: Remove unnecessary return's from void functions
[net-next-2.6.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
acf509ae
CB		 123#define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
124#define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
125#define BANDB_DEVICE_ID_US9ML2_2 0xAC29
126#define BANDB_DEVICE_ID_US9ML2_4 0xAC30
127#define BANDB_DEVICE_ID_USPTL4_2 0xAC31
128#define BANDB_DEVICE_ID_USPTL4_4 0xAC32
27f1281d
BG		 129#define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
130#define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
131#define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
3f542974 132
9d498bea
RL		 133/* This driver also supports
134 * ATEN UC2324 device using Moschip MCS7840
135 * ATEN UC2322 device using Moschip MCS7820
136 */
e9b8cffa
TC		 137#define USB_VENDOR_ID_ATENINTL 0x0557
138#define ATENINTL_DEVICE_ID_UC2324 0x2011
9d498bea 139#define ATENINTL_DEVICE_ID_UC2322 0x7820
e9b8cffa 140
11e1abb4 141/* Interrupt Routine Defines */
3f542974
PS		 142
143#define SERIAL_IIR_RLS 0x06
144#define SERIAL_IIR_MS 0x00
145
146/*
147 * Emulation of the bit mask on the LINE STATUS REGISTER.
148 */
149#define SERIAL_LSR_DR 0x0001
150#define SERIAL_LSR_OE 0x0002
151#define SERIAL_LSR_PE 0x0004
152#define SERIAL_LSR_FE 0x0008
153#define SERIAL_LSR_BI 0x0010
154
155#define MOS_MSR_DELTA_CTS 0x10
156#define MOS_MSR_DELTA_DSR 0x20
157#define MOS_MSR_DELTA_RI 0x40
158#define MOS_MSR_DELTA_CD 0x80
159
880af9db 160/* Serial Port register Address */
3f542974
PS		 161#define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
162#define FIFO_CONTROL_REGISTER ((__u16)(0x02))
163#define LINE_CONTROL_REGISTER ((__u16)(0x03))
164#define MODEM_CONTROL_REGISTER ((__u16)(0x04))
165#define LINE_STATUS_REGISTER ((__u16)(0x05))
166#define MODEM_STATUS_REGISTER ((__u16)(0x06))
167#define SCRATCH_PAD_REGISTER ((__u16)(0x07))
168#define DIVISOR_LATCH_LSB ((__u16)(0x00))
169#define DIVISOR_LATCH_MSB ((__u16)(0x01))
170
171#define CLK_MULTI_REGISTER ((__u16)(0x02))
172#define CLK_START_VALUE_REGISTER ((__u16)(0x03))
173
174#define SERIAL_LCR_DLAB ((__u16)(0x0080))
175
176/*
177 * URB POOL related defines
178 */
179#define NUM_URBS 16 /* URB Count */
180#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
181
182
7d40d7e8 183static const struct usb_device_id moschip_port_id_table[] = {
3f542974
PS		 184 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
185 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
acf509ae
CB		 186 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
187 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
188 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
189 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
190 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
191 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
11e1abb4 192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
acf509ae 193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
27f1281d 194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
e9b8cffa 195 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
9d498bea 196 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
3f542974
PS		 197 {} /* terminating entry */
198};
199
7d40d7e8 200static const struct usb_device_id moschip_id_table_combined[] __devinitconst = {
3f542974
PS		 201 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
202 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
acf509ae
CB		 203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
208 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
11e1abb4 209 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
acf509ae 210 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
27f1281d 211 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
e9b8cffa 212 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
9d498bea 213 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
3f542974
PS		 214 {} /* terminating entry */
215};
216
217MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
218
219/* This structure holds all of the local port information */
220
221struct moschip_port {
222 int port_num; /*Actual port number in the device(1,2,etc) */
223 struct urb *write_urb; /* write URB for this port */
224 struct urb *read_urb; /* read URB for this port */
0de9a702 225 struct urb *int_urb;
3f542974
PS		 226 __u8 shadowLCR; /* last LCR value received */
227 __u8 shadowMCR; /* last MCR value received */
228 char open;
0de9a702
ON		 229 char open_ports;
230 char zombie;
3f542974
PS		 231 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
232 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
233 int delta_msr_cond;
234 struct async_icount icount;
235 struct usb_serial_port *port; /* loop back to the owner of this object */
236
880af9db 237 /* Offsets */
3f542974
PS		 238 __u8 SpRegOffset;
239 __u8 ControlRegOffset;
240 __u8 DcrRegOffset;
880af9db 241 /* for processing control URBS in interrupt context */
3f542974 242 struct urb *control_urb;
0de9a702 243 struct usb_ctrlrequest *dr;
3f542974
PS		 244 char *ctrl_buf;
245 int MsrLsr;
246
0de9a702 247 spinlock_t pool_lock;
3f542974 248 struct urb *write_urb_pool[NUM_URBS];
0de9a702 249 char busy[NUM_URBS];
50de36f7 250 bool read_urb_busy;
3f542974
PS		 251};
252
253
254static int debug;
3f542974
PS		 255
256/*
257 * mos7840_set_reg_sync
258 * To set the Control register by calling usb_fill_control_urb function
259 * by passing usb_sndctrlpipe function as parameter.
260 */
261
262static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
263 __u16 val)
264{
265 struct usb_device *dev = port->serial->dev;
266 val = val & 0x00ff;
84fe6e79 267 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val);
3f542974
PS		 268
269 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
270 MCS_WR_RTYPE, val, reg, NULL, 0,
271 MOS_WDR_TIMEOUT);
272}
273
274/*
275 * mos7840_get_reg_sync
276 * To set the Uart register by calling usb_fill_control_urb function by
277 * passing usb_rcvctrlpipe function as parameter.
278 */
279
280static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
880af9db 281 __u16 *val)
3f542974
PS		 282{
283 struct usb_device *dev = port->serial->dev;
284 int ret = 0;
9e221a35
JH		 285 u8 *buf;
286
287 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
288 if (!buf)
289 return -ENOMEM;
3f542974
PS		 290
291 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 292 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
3f542974 293 MOS_WDR_TIMEOUT);
9e221a35 294 *val = buf[0];
84fe6e79 295 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
9e221a35
JH		 296
297 kfree(buf);
3f542974
PS		 298 return ret;
299}
300
301/*
302 * mos7840_set_uart_reg
303 * To set the Uart register by calling usb_fill_control_urb function by
304 * passing usb_sndctrlpipe function as parameter.
305 */
306
307static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
308 __u16 val)
309{
310
311 struct usb_device *dev = port->serial->dev;
312 val = val & 0x00ff;
880af9db
AC		 313 /* For the UART control registers, the application number need
314 to be Or'ed */
0de9a702 315 if (port->serial->num_ports == 4) {
880af9db
AC		 316 val |= (((__u16) port->number -
317 (__u16) (port->serial->minor)) + 1) << 8;
84fe6e79 318 dbg("mos7840_set_uart_reg application number is %x", val);
3f542974
PS		 319 } else {
320 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 321 val |= (((__u16) port->number -
3f542974 322 (__u16) (port->serial->minor)) + 1) << 8;
84fe6e79 323 dbg("mos7840_set_uart_reg application number is %x",
3f542974
PS		 324 val);
325 } else {
326 val |=
327 (((__u16) port->number -
328 (__u16) (port->serial->minor)) + 2) << 8;
84fe6e79 329 dbg("mos7840_set_uart_reg application number is %x",
3f542974
PS		 330 val);
331 }
332 }
333 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
334 MCS_WR_RTYPE, val, reg, NULL, 0,
335 MOS_WDR_TIMEOUT);
336
337}
338
339/*
340 * mos7840_get_uart_reg
341 * To set the Control register by calling usb_fill_control_urb function
342 * by passing usb_rcvctrlpipe function as parameter.
343 */
344static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
880af9db 345 __u16 *val)
3f542974
PS		 346{
347 struct usb_device *dev = port->serial->dev;
348 int ret = 0;
349 __u16 Wval;
9e221a35
JH		 350 u8 *buf;
351
352 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
353 if (!buf)
354 return -ENOMEM;
3f542974 355
84fe6e79 356 /* dbg("application number is %4x",
880af9db
AC		 357 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
358 /* Wval is same as application number */
0de9a702 359 if (port->serial->num_ports == 4) {
3f542974
PS		 360 Wval =
361 (((__u16) port->number - (__u16) (port->serial->minor)) +
362 1) << 8;
84fe6e79 363 dbg("mos7840_get_uart_reg application number is %x", Wval);
3f542974
PS		 364 } else {
365 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 366 Wval = (((__u16) port->number -
3f542974 367 (__u16) (port->serial->minor)) + 1) << 8;
84fe6e79 368 dbg("mos7840_get_uart_reg application number is %x",
3f542974
PS		 369 Wval);
370 } else {
880af9db 371 Wval = (((__u16) port->number -
3f542974 372 (__u16) (port->serial->minor)) + 2) << 8;
84fe6e79 373 dbg("mos7840_get_uart_reg application number is %x",
3f542974
PS		 374 Wval);
375 }
376 }
377 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 378 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
3f542974 379 MOS_WDR_TIMEOUT);
9e221a35
JH		 380 *val = buf[0];
381
382 kfree(buf);
3f542974
PS		 383 return ret;
384}
385
386static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
387{
388
84fe6e79
TC		 389 dbg("***************************************");
390 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset);
391 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset);
392 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset);
393 dbg("***************************************");
3f542974
PS		 394
395}
396
397/************************************************************************/
398/************************************************************************/
399/* I N T E R F A C E F U N C T I O N S */
400/* I N T E R F A C E F U N C T I O N S */
401/************************************************************************/
402/************************************************************************/
403
404static inline void mos7840_set_port_private(struct usb_serial_port *port,
405 struct moschip_port *data)
406{
407 usb_set_serial_port_data(port, (void *)data);
408}
409
410static inline struct moschip_port *mos7840_get_port_private(struct
411 usb_serial_port
412 *port)
413{
414 return (struct moschip_port *)usb_get_serial_port_data(port);
415}
416
0de9a702 417static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
3f542974
PS		 418{
419 struct moschip_port *mos7840_port;
420 struct async_icount *icount;
421 mos7840_port = port;
422 icount = &mos7840_port->icount;
423 if (new_msr &
424 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
425 MOS_MSR_DELTA_CD)) {
426 icount = &mos7840_port->icount;
427
428 /* update input line counters */
429 if (new_msr & MOS_MSR_DELTA_CTS) {
430 icount->cts++;
0de9a702 431 smp_wmb();
3f542974
PS		 432 }
433 if (new_msr & MOS_MSR_DELTA_DSR) {
434 icount->dsr++;
0de9a702 435 smp_wmb();
3f542974
PS		 436 }
437 if (new_msr & MOS_MSR_DELTA_CD) {
438 icount->dcd++;
0de9a702 439 smp_wmb();
3f542974
PS		 440 }
441 if (new_msr & MOS_MSR_DELTA_RI) {
442 icount->rng++;
0de9a702 443 smp_wmb();
3f542974
PS		 444 }
445 }
3f542974
PS		 446}
447
0de9a702 448static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
3f542974
PS		 449{
450 struct async_icount *icount;
451
441b62c1 452 dbg("%s - %02x", __func__, new_lsr);
3f542974
PS		 453
454 if (new_lsr & SERIAL_LSR_BI) {
880af9db
AC		 455 /*
456 * Parity and Framing errors only count if they
457 * occur exclusive of a break being
458 * received.
459 */
3f542974
PS		 460 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
461 }
462
463 /* update input line counters */
464 icount = &port->icount;
465 if (new_lsr & SERIAL_LSR_BI) {
466 icount->brk++;
0de9a702 467 smp_wmb();
3f542974
PS		 468 }
469 if (new_lsr & SERIAL_LSR_OE) {
470 icount->overrun++;
0de9a702 471 smp_wmb();
3f542974
PS		 472 }
473 if (new_lsr & SERIAL_LSR_PE) {
474 icount->parity++;
0de9a702 475 smp_wmb();
3f542974
PS		 476 }
477 if (new_lsr & SERIAL_LSR_FE) {
478 icount->frame++;
0de9a702 479 smp_wmb();
3f542974 480 }
3f542974
PS		 481}
482
483/************************************************************************/
484/************************************************************************/
485/* U S B C A L L B A C K F U N C T I O N S */
486/* U S B C A L L B A C K F U N C T I O N S */
487/************************************************************************/
488/************************************************************************/
489
7d12e780 490static void mos7840_control_callback(struct urb *urb)
3f542974
PS		 491{
492 unsigned char *data;
493 struct moschip_port *mos7840_port;
494 __u8 regval = 0x0;
0de9a702 495 int result = 0;
0643c724 496 int status = urb->status;
3f542974 497
cdc97792 498 mos7840_port = urb->context;
0de9a702 499
0643c724 500 switch (status) {
3f542974
PS		 501 case 0:
502 /* success */
503 break;
504 case -ECONNRESET:
505 case -ENOENT:
506 case -ESHUTDOWN:
507 /* this urb is terminated, clean up */
441b62c1 508 dbg("%s - urb shutting down with status: %d", __func__,
0643c724 509 status);
3f542974
PS		 510 return;
511 default:
441b62c1 512 dbg("%s - nonzero urb status received: %d", __func__,
0643c724 513 status);
3f542974
PS		 514 goto exit;
515 }
516
84fe6e79
TC		 517 dbg("%s urb buffer size is %d", __func__, urb->actual_length);
518 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__,
3f542974
PS		 519 mos7840_port->MsrLsr, mos7840_port->port_num);
520 data = urb->transfer_buffer;
521 regval = (__u8) data[0];
84fe6e79 522 dbg("%s data is %x", __func__, regval);
3f542974
PS		 523 if (mos7840_port->MsrLsr == 0)
524 mos7840_handle_new_msr(mos7840_port, regval);
525 else if (mos7840_port->MsrLsr == 1)
526 mos7840_handle_new_lsr(mos7840_port, regval);
527
0de9a702
ON		 528exit:
529 spin_lock(&mos7840_port->pool_lock);
530 if (!mos7840_port->zombie)
531 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
532 spin_unlock(&mos7840_port->pool_lock);
533 if (result) {
534 dev_err(&urb->dev->dev,
535 "%s - Error %d submitting interrupt urb\n",
441b62c1 536 __func__, result);
0de9a702 537 }
3f542974
PS		 538}
539
540static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
880af9db 541 __u16 *val)
3f542974
PS		 542{
543 struct usb_device *dev = mcs->port->serial->dev;
0de9a702
ON		 544 struct usb_ctrlrequest *dr = mcs->dr;
545 unsigned char *buffer = mcs->ctrl_buf;
546 int ret;
3f542974 547
3f542974
PS		 548 dr->bRequestType = MCS_RD_RTYPE;
549 dr->bRequest = MCS_RDREQ;
880af9db 550 dr->wValue = cpu_to_le16(Wval); /* 0 */
3f542974
PS		 551 dr->wIndex = cpu_to_le16(reg);
552 dr->wLength = cpu_to_le16(2);
553
554 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
555 (unsigned char *)dr, buffer, 2,
556 mos7840_control_callback, mcs);
557 mcs->control_urb->transfer_buffer_length = 2;
558 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
559 return ret;
560}
561
562/*****************************************************************************
563 * mos7840_interrupt_callback
564 * this is the callback function for when we have received data on the
565 * interrupt endpoint.
566 *****************************************************************************/
567
7d12e780 568static void mos7840_interrupt_callback(struct urb *urb)
3f542974
PS		 569{
570 int result;
571 int length;
572 struct moschip_port *mos7840_port;
573 struct usb_serial *serial;
574 __u16 Data;
575 unsigned char *data;
576 __u8 sp[5], st;
0de9a702
ON		 577 int i, rv = 0;
578 __u16 wval, wreg = 0;
0643c724 579 int status = urb->status;
3f542974 580
84fe6e79 581 dbg("%s", " : Entering");
3f542974 582
0643c724 583 switch (status) {
3f542974
PS		 584 case 0:
585 /* success */
586 break;
587 case -ECONNRESET:
588 case -ENOENT:
589 case -ESHUTDOWN:
590 /* this urb is terminated, clean up */
441b62c1 591 dbg("%s - urb shutting down with status: %d", __func__,
0643c724 592 status);
3f542974
PS		 593 return;
594 default:
441b62c1 595 dbg("%s - nonzero urb status received: %d", __func__,
0643c724 596 status);
3f542974
PS		 597 goto exit;
598 }
599
600 length = urb->actual_length;
601 data = urb->transfer_buffer;
602
cdc97792 603 serial = urb->context;
3f542974
PS		 604
605 /* Moschip get 5 bytes
606 * Byte 1 IIR Port 1 (port.number is 0)
607 * Byte 2 IIR Port 2 (port.number is 1)
608 * Byte 3 IIR Port 3 (port.number is 2)
609 * Byte 4 IIR Port 4 (port.number is 3)
610 * Byte 5 FIFO status for both */
611
612 if (length && length > 5) {
84fe6e79 613 dbg("%s", "Wrong data !!!");
3f542974
PS		 614 return;
615 }
616
617 sp[0] = (__u8) data[0];
618 sp[1] = (__u8) data[1];
619 sp[2] = (__u8) data[2];
620 sp[3] = (__u8) data[3];
621 st = (__u8) data[4];
622
623 for (i = 0; i < serial->num_ports; i++) {
624 mos7840_port = mos7840_get_port_private(serial->port[i]);
625 wval =
626 (((__u16) serial->port[i]->number -
627 (__u16) (serial->minor)) + 1) << 8;
628 if (mos7840_port->open) {
629 if (sp[i] & 0x01) {
84fe6e79 630 dbg("SP%d No Interrupt !!!", i);
3f542974
PS		 631 } else {
632 switch (sp[i] & 0x0f) {
633 case SERIAL_IIR_RLS:
634 dbg("Serial Port %d: Receiver status error or ", i);
84fe6e79 635 dbg("address bit detected in 9-bit mode");
3f542974 636 mos7840_port->MsrLsr = 1;
0de9a702 637 wreg = LINE_STATUS_REGISTER;
3f542974
PS		 638 break;
639 case SERIAL_IIR_MS:
84fe6e79 640 dbg("Serial Port %d: Modem status change", i);
3f542974 641 mos7840_port->MsrLsr = 0;
0de9a702 642 wreg = MODEM_STATUS_REGISTER;
3f542974
PS		 643 break;
644 }
0de9a702
ON		 645 spin_lock(&mos7840_port->pool_lock);
646 if (!mos7840_port->zombie) {
647 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
648 } else {
649 spin_unlock(&mos7840_port->pool_lock);
650 return;
651 }
652 spin_unlock(&mos7840_port->pool_lock);
3f542974
PS		 653 }
654 }
655 }
880af9db
AC		 656 if (!(rv < 0))
657 /* the completion handler for the control urb will resubmit */
0de9a702
ON		 658 return;
659exit:
3f542974
PS		 660 result = usb_submit_urb(urb, GFP_ATOMIC);
661 if (result) {
662 dev_err(&urb->dev->dev,
663 "%s - Error %d submitting interrupt urb\n",
441b62c1 664 __func__, result);
3f542974 665 }
3f542974
PS		 666}
667
668static int mos7840_port_paranoia_check(struct usb_serial_port *port,
669 const char *function)
670{
671 if (!port) {
672 dbg("%s - port == NULL", function);
673 return -1;
674 }
675 if (!port->serial) {
676 dbg("%s - port->serial == NULL", function);
677 return -1;
678 }
679
680 return 0;
681}
682
683/* Inline functions to check the sanity of a pointer that is passed to us */
684static int mos7840_serial_paranoia_check(struct usb_serial *serial,
685 const char *function)
686{
687 if (!serial) {
688 dbg("%s - serial == NULL", function);
689 return -1;
690 }
691 if (!serial->type) {
692 dbg("%s - serial->type == NULL!", function);
693 return -1;
694 }
695
696 return 0;
697}
698
699static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
700 const char *function)
701{
702 /* if no port was specified, or it fails a paranoia check */
703 if (!port ||
704 mos7840_port_paranoia_check(port, function) ||
705 mos7840_serial_paranoia_check(port->serial, function)) {
880af9db
AC		 706 /* then say that we don't have a valid usb_serial thing,
707 * which will end up genrating -ENODEV return values */
3f542974
PS		 708 return NULL;
709 }
710
711 return port->serial;
712}
713
714/*****************************************************************************
715 * mos7840_bulk_in_callback
716 * this is the callback function for when we have received data on the
717 * bulk in endpoint.
718 *****************************************************************************/
719
7d12e780 720static void mos7840_bulk_in_callback(struct urb *urb)
3f542974 721{
0643c724 722 int retval;
3f542974
PS		 723 unsigned char *data;
724 struct usb_serial *serial;
725 struct usb_serial_port *port;
726 struct moschip_port *mos7840_port;
727 struct tty_struct *tty;
0643c724 728 int status = urb->status;
3f542974 729
cdc97792 730 mos7840_port = urb->context;
3f542974 731 if (!mos7840_port) {
84fe6e79 732 dbg("%s", "NULL mos7840_port pointer");
50de36f7
GKH		 733 return;
734 }
735
736 if (status) {
737 dbg("nonzero read bulk status received: %d", status);
738 mos7840_port->read_urb_busy = false;
3f542974
PS		 739 return;
740 }
741
742 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 743 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 744 dbg("%s", "Port Paranoia failed");
50de36f7 745 mos7840_port->read_urb_busy = false;
3f542974
PS		 746 return;
747 }
748
441b62c1 749 serial = mos7840_get_usb_serial(port, __func__);
3f542974 750 if (!serial) {
84fe6e79 751 dbg("%s", "Bad serial pointer");
50de36f7 752 mos7840_port->read_urb_busy = false;
3f542974
PS		 753 return;
754 }
755
84fe6e79 756 dbg("%s", "Entering... ");
3f542974
PS		 757
758 data = urb->transfer_buffer;
759
84fe6e79 760 dbg("%s", "Entering ...........");
3f542974
PS		 761
762 if (urb->actual_length) {
4a90f09b 763 tty = tty_port_tty_get(&mos7840_port->port->port);
3f542974 764 if (tty) {
3f542974 765 tty_insert_flip_string(tty, data, urb->actual_length);
84fe6e79 766 dbg(" %s ", data);
3f542974 767 tty_flip_buffer_push(tty);
4a90f09b 768 tty_kref_put(tty);
3f542974
PS		 769 }
770 mos7840_port->icount.rx += urb->actual_length;
0de9a702 771 smp_wmb();
84fe6e79 772 dbg("mos7840_port->icount.rx is %d:",
3f542974
PS		 773 mos7840_port->icount.rx);
774 }
775
776 if (!mos7840_port->read_urb) {
84fe6e79 777 dbg("%s", "URB KILLED !!!");
50de36f7 778 mos7840_port->read_urb_busy = false;
3f542974
PS		 779 return;
780 }
781
3f542974 782
0de9a702 783 mos7840_port->read_urb->dev = serial->dev;
3f542974 784
50de36f7 785 mos7840_port->read_urb_busy = true;
0643c724 786 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
0de9a702 787
0643c724 788 if (retval) {
50de36f7
GKH		 789 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
790 mos7840_port->read_urb_busy = false;
3f542974
PS		 791 }
792}
793
794/*****************************************************************************
795 * mos7840_bulk_out_data_callback
880af9db
AC		 796 * this is the callback function for when we have finished sending
797 * serial data on the bulk out endpoint.
3f542974
PS		 798 *****************************************************************************/
799
7d12e780 800static void mos7840_bulk_out_data_callback(struct urb *urb)
3f542974
PS		 801{
802 struct moschip_port *mos7840_port;
803 struct tty_struct *tty;
0643c724 804 int status = urb->status;
0de9a702
ON		 805 int i;
806
cdc97792 807 mos7840_port = urb->context;
0de9a702
ON		 808 spin_lock(&mos7840_port->pool_lock);
809 for (i = 0; i < NUM_URBS; i++) {
810 if (urb == mos7840_port->write_urb_pool[i]) {
811 mos7840_port->busy[i] = 0;
812 break;
813 }
814 }
815 spin_unlock(&mos7840_port->pool_lock);
816
0643c724 817 if (status) {
84fe6e79 818 dbg("nonzero write bulk status received:%d", status);
3f542974
PS		 819 return;
820 }
821
441b62c1 822 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
84fe6e79 823 dbg("%s", "Port Paranoia failed");
3f542974
PS		 824 return;
825 }
826
84fe6e79 827 dbg("%s", "Entering .........");
3f542974 828
4a90f09b 829 tty = tty_port_tty_get(&mos7840_port->port->port);
b963a844
JS		 830 if (tty && mos7840_port->open)
831 tty_wakeup(tty);
4a90f09b 832 tty_kref_put(tty);
3f542974
PS		 833
834}
835
836/************************************************************************/
837/* 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 */
838/************************************************************************/
839#ifdef MCSSerialProbe
840static int mos7840_serial_probe(struct usb_serial *serial,
841 const struct usb_device_id *id)
842{
843
844 /*need to implement the mode_reg reading and updating\
845 structures usb_serial_ device_type\
846 (i.e num_ports, num_bulkin,bulkout etc) */
847 /* Also we can update the changes attach */
848 return 1;
849}
850#endif
851
852/*****************************************************************************
853 * mos7840_open
854 * this function is called by the tty driver when a port is opened
855 * If successful, we return 0
856 * Otherwise we return a negative error number.
857 *****************************************************************************/
858
a509a7e4 859static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
3f542974
PS		 860{
861 int response;
862 int j;
863 struct usb_serial *serial;
864 struct urb *urb;
865 __u16 Data;
866 int status;
867 struct moschip_port *mos7840_port;
0de9a702 868 struct moschip_port *port0;
3f542974 869
84fe6e79
TC		 870 dbg ("%s enter", __func__);
871
441b62c1 872 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 873 dbg("%s", "Port Paranoia failed");
3f542974
PS		 874 return -ENODEV;
875 }
876
3f542974
PS		 877 serial = port->serial;
878
441b62c1 879 if (mos7840_serial_paranoia_check(serial, __func__)) {
84fe6e79 880 dbg("%s", "Serial Paranoia failed");
3f542974
PS		 881 return -ENODEV;
882 }
883
884 mos7840_port = mos7840_get_port_private(port);
0de9a702 885 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 886
0de9a702 887 if (mos7840_port == NULL || port0 == NULL)
3f542974
PS		 888 return -ENODEV;
889
890 usb_clear_halt(serial->dev, port->write_urb->pipe);
891 usb_clear_halt(serial->dev, port->read_urb->pipe);
0de9a702 892 port0->open_ports++;
3f542974
PS		 893
894 /* Initialising the write urb pool */
895 for (j = 0; j < NUM_URBS; ++j) {
0de9a702 896 urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974
PS		 897 mos7840_port->write_urb_pool[j] = urb;
898
899 if (urb == NULL) {
194343d9 900 dev_err(&port->dev, "No more urbs???\n");
3f542974
PS		 901 continue;
902 }
903
880af9db
AC		 904 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
905 GFP_KERNEL);
3f542974 906 if (!urb->transfer_buffer) {
0de9a702
ON		 907 usb_free_urb(urb);
908 mos7840_port->write_urb_pool[j] = NULL;
194343d9
GKH		 909 dev_err(&port->dev,
910 "%s-out of memory for urb buffers.\n",
911 __func__);
3f542974
PS		 912 continue;
913 }
914 }
915
916/*****************************************************************************
917 * Initialize MCS7840 -- Write Init values to corresponding Registers
918 *
919 * Register Index
920 * 1 : IER
921 * 2 : FCR
922 * 3 : LCR
923 * 4 : MCR
924 *
925 * 0x08 : SP1/2 Control Reg
926 *****************************************************************************/
927
880af9db 928 /* NEED to check the following Block */
3f542974 929
3f542974
PS		 930 Data = 0x0;
931 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
932 if (status < 0) {
84fe6e79 933 dbg("Reading Spreg failed");
3f542974
PS		 934 return -1;
935 }
936 Data |= 0x80;
937 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
938 if (status < 0) {
84fe6e79 939 dbg("writing Spreg failed");
3f542974
PS		 940 return -1;
941 }
942
943 Data &= ~0x80;
944 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
945 if (status < 0) {
84fe6e79 946 dbg("writing Spreg failed");
3f542974
PS		 947 return -1;
948 }
880af9db 949 /* End of block to be checked */
3f542974 950
3f542974 951 Data = 0x0;
880af9db
AC		 952 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
953 &Data);
3f542974 954 if (status < 0) {
84fe6e79 955 dbg("Reading Controlreg failed");
3f542974
PS		 956 return -1;
957 }
880af9db
AC		 958 Data |= 0x08; /* Driver done bit */
959 Data |= 0x20; /* rx_disable */
960 status = mos7840_set_reg_sync(port,
961 mos7840_port->ControlRegOffset, Data);
3f542974 962 if (status < 0) {
84fe6e79 963 dbg("writing Controlreg failed");
3f542974
PS		 964 return -1;
965 }
880af9db
AC		 966 /* do register settings here */
967 /* Set all regs to the device default values. */
968 /***********************************
969 * First Disable all interrupts.
970 ***********************************/
3f542974 971 Data = 0x00;
3f542974
PS		 972 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
973 if (status < 0) {
84fe6e79 974 dbg("disabling interrupts failed");
3f542974
PS		 975 return -1;
976 }
880af9db 977 /* Set FIFO_CONTROL_REGISTER to the default value */
3f542974 978 Data = 0x00;
3f542974
PS		 979 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
980 if (status < 0) {
84fe6e79 981 dbg("Writing FIFO_CONTROL_REGISTER failed");
3f542974
PS		 982 return -1;
983 }
984
985 Data = 0xcf;
3f542974
PS		 986 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
987 if (status < 0) {
84fe6e79 988 dbg("Writing FIFO_CONTROL_REGISTER failed");
3f542974
PS		 989 return -1;
990 }
991
992 Data = 0x03;
3f542974
PS		 993 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
994 mos7840_port->shadowLCR = Data;
995
996 Data = 0x0b;
3f542974
PS		 997 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
998 mos7840_port->shadowMCR = Data;
999
1000 Data = 0x00;
3f542974
PS		 1001 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1002 mos7840_port->shadowLCR = Data;
1003
880af9db 1004 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1005 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1006
1007 Data = 0x0c;
3f542974
PS		 1008 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1009
1010 Data = 0x0;
3f542974
PS		 1011 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1012
1013 Data = 0x00;
3f542974
PS		 1014 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1015
1016 Data = Data & ~SERIAL_LCR_DLAB;
3f542974
PS		 1017 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1018 mos7840_port->shadowLCR = Data;
1019
880af9db 1020 /* clearing Bulkin and Bulkout Fifo */
3f542974 1021 Data = 0x0;
3f542974
PS		 1022 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1023
1024 Data = Data | 0x0c;
3f542974
PS		 1025 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1026
1027 Data = Data & ~0x0c;
3f542974 1028 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
880af9db 1029 /* Finally enable all interrupts */
3f542974 1030 Data = 0x0c;
3f542974
PS		 1031 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1032
880af9db 1033 /* clearing rx_disable */
3f542974 1034 Data = 0x0;
880af9db
AC		 1035 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1036 &Data);
3f542974 1037 Data = Data & ~0x20;
880af9db
AC		 1038 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1039 Data);
3f542974 1040
880af9db 1041 /* rx_negate */
3f542974 1042 Data = 0x0;
880af9db
AC		 1043 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1044 &Data);
3f542974 1045 Data = Data | 0x10;
880af9db
AC		 1046 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1047 Data);
3f542974 1048
880af9db
AC		 1049 /* Check to see if we've set up our endpoint info yet *
1050 * (can't set it up in mos7840_startup as the structures *
1051 * were not set up at that time.) */
0de9a702 1052 if (port0->open_ports == 1) {
3f542974 1053 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1054 /* set up interrupt urb */
3f542974 1055 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1056 serial->dev,
1057 usb_rcvintpipe(serial->dev,
1058 serial->port[0]->interrupt_in_endpointAddress),
1059 serial->port[0]->interrupt_in_buffer,
1060 serial->port[0]->interrupt_in_urb->
1061 transfer_buffer_length,
1062 mos7840_interrupt_callback,
1063 serial,
1064 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1065
1066 /* start interrupt read for mos7840 *
1067 * will continue as long as mos7840 is connected */
1068
1069 response =
1070 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1071 GFP_KERNEL);
1072 if (response) {
194343d9
GKH		 1073 dev_err(&port->dev, "%s - Error %d submitting "
1074 "interrupt urb\n", __func__, response);
3f542974
PS		 1075 }
1076
1077 }
1078
1079 }
1080
1081 /* see if we've set up our endpoint info yet *
1082 * (can't set it up in mos7840_startup as the *
1083 * structures were not set up at that time.) */
1084
84fe6e79
TC		 1085 dbg("port number is %d", port->number);
1086 dbg("serial number is %d", port->serial->minor);
1087 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
1088 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
1089 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
1090 dbg("port's number in the device is %d", mos7840_port->port_num);
3f542974
PS		 1091 mos7840_port->read_urb = port->read_urb;
1092
1093 /* set up our bulk in urb */
1094
1095 usb_fill_bulk_urb(mos7840_port->read_urb,
1096 serial->dev,
1097 usb_rcvbulkpipe(serial->dev,
1098 port->bulk_in_endpointAddress),
1099 port->bulk_in_buffer,
1100 mos7840_port->read_urb->transfer_buffer_length,
1101 mos7840_bulk_in_callback, mos7840_port);
1102
84fe6e79 1103 dbg("mos7840_open: bulkin endpoint is %d",
3f542974 1104 port->bulk_in_endpointAddress);
50de36f7 1105 mos7840_port->read_urb_busy = true;
3f542974
PS		 1106 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1107 if (response) {
194343d9
GKH		 1108 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1109 __func__, response);
50de36f7 1110 mos7840_port->read_urb_busy = false;
3f542974
PS		 1111 }
1112
1113 /* initialize our wait queues */
1114 init_waitqueue_head(&mos7840_port->wait_chase);
1115 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1116
1117 /* initialize our icount structure */
1118 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1119
1120 /* initialize our port settings */
880af9db
AC		 1121 /* Must set to enable ints! */
1122 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1123 /* send a open port command */
1124 mos7840_port->open = 1;
880af9db 1125 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974
PS		 1126 mos7840_port->icount.tx = 0;
1127 mos7840_port->icount.rx = 0;
1128
84fe6e79 1129 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
880af9db 1130 serial, mos7840_port, port);
3f542974 1131
84fe6e79
TC		 1132 dbg ("%s leave", __func__);
1133
3f542974
PS		 1134 return 0;
1135
1136}
1137
1138/*****************************************************************************
1139 * mos7840_chars_in_buffer
1140 * this function is called by the tty driver when it wants to know how many
1141 * bytes of data we currently have outstanding in the port (data that has
1142 * been written, but hasn't made it out the port yet)
1143 * If successful, we return the number of bytes left to be written in the
1144 * system,
95da310e 1145 * Otherwise we return zero.
3f542974
PS		 1146 *****************************************************************************/
1147
95da310e 1148static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1149{
95da310e 1150 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1151 int i;
1152 int chars = 0;
0de9a702 1153 unsigned long flags;
3f542974
PS		 1154 struct moschip_port *mos7840_port;
1155
84fe6e79 1156 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
3f542974 1157
441b62c1 1158 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1159 dbg("%s", "Invalid port");
95da310e 1160 return 0;
3f542974
PS		 1161 }
1162
1163 mos7840_port = mos7840_get_port_private(port);
1164 if (mos7840_port == NULL) {
84fe6e79 1165 dbg("%s", "mos7840_break:leaving ...........");
95da310e 1166 return 0;
3f542974
PS		 1167 }
1168
880af9db 1169 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
95da310e
AC		 1170 for (i = 0; i < NUM_URBS; ++i)
1171 if (mos7840_port->busy[i])
3f542974 1172 chars += URB_TRANSFER_BUFFER_SIZE;
880af9db 1173 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
441b62c1 1174 dbg("%s - returns %d", __func__, chars);
0de9a702 1175 return chars;
3f542974
PS		 1176
1177}
1178
3f542974
PS		 1179/*****************************************************************************
1180 * mos7840_close
1181 * this function is called by the tty driver when a port is closed
1182 *****************************************************************************/
1183
335f8514 1184static void mos7840_close(struct usb_serial_port *port)
3f542974
PS		 1185{
1186 struct usb_serial *serial;
1187 struct moschip_port *mos7840_port;
0de9a702 1188 struct moschip_port *port0;
3f542974
PS		 1189 int j;
1190 __u16 Data;
1191
84fe6e79 1192 dbg("%s", "mos7840_close:entering...");
3f542974 1193
441b62c1 1194 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1195 dbg("%s", "Port Paranoia failed");
3f542974
PS		 1196 return;
1197 }
1198
441b62c1 1199 serial = mos7840_get_usb_serial(port, __func__);
3f542974 1200 if (!serial) {
84fe6e79 1201 dbg("%s", "Serial Paranoia failed");
3f542974
PS		 1202 return;
1203 }
1204
1205 mos7840_port = mos7840_get_port_private(port);
0de9a702 1206 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1207
0de9a702 1208 if (mos7840_port == NULL || port0 == NULL)
3f542974 1209 return;
3f542974
PS		 1210
1211 for (j = 0; j < NUM_URBS; ++j)
1212 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1213
1214 /* Freeing Write URBs */
1215 for (j = 0; j < NUM_URBS; ++j) {
1216 if (mos7840_port->write_urb_pool[j]) {
1217 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1218 kfree(mos7840_port->write_urb_pool[j]->
1219 transfer_buffer);
1220
1221 usb_free_urb(mos7840_port->write_urb_pool[j]);
1222 }
1223 }
1224
3f542974
PS		 1225 /* While closing port, shutdown all bulk read, write *
1226 * and interrupt read if they exists */
1227 if (serial->dev) {
3f542974 1228 if (mos7840_port->write_urb) {
84fe6e79 1229 dbg("%s", "Shutdown bulk write");
3f542974
PS		 1230 usb_kill_urb(mos7840_port->write_urb);
1231 }
3f542974 1232 if (mos7840_port->read_urb) {
84fe6e79 1233 dbg("%s", "Shutdown bulk read");
3f542974 1234 usb_kill_urb(mos7840_port->read_urb);
50de36f7 1235 mos7840_port->read_urb_busy = false;
3f542974
PS		 1236 }
1237 if ((&mos7840_port->control_urb)) {
84fe6e79 1238 dbg("%s", "Shutdown control read");
880af9db 1239 /*/ usb_kill_urb (mos7840_port->control_urb); */
3f542974
PS		 1240 }
1241 }
880af9db
AC		 1242/* if(mos7840_port->ctrl_buf != NULL) */
1243/* kfree(mos7840_port->ctrl_buf); */
0de9a702 1244 port0->open_ports--;
84fe6e79 1245 dbg("mos7840_num_open_ports in close%d:in port%d",
0de9a702
ON		 1246 port0->open_ports, port->number);
1247 if (port0->open_ports == 0) {
3f542974 1248 if (serial->port[0]->interrupt_in_urb) {
84fe6e79 1249 dbg("%s", "Shutdown interrupt_in_urb");
0de9a702 1250 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1251 }
1252 }
1253
1254 if (mos7840_port->write_urb) {
1255 /* if this urb had a transfer buffer already (old tx) free it */
880af9db 1256 if (mos7840_port->write_urb->transfer_buffer != NULL)
3f542974 1257 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1258 usb_free_urb(mos7840_port->write_urb);
1259 }
1260
1261 Data = 0x0;
1262 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1263
1264 Data = 0x00;
1265 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1266
1267 mos7840_port->open = 0;
1268
84fe6e79 1269 dbg("%s", "Leaving ............");
3f542974
PS		 1270}
1271
1272/************************************************************************
1273 *
1274 * mos7840_block_until_chase_response
1275 *
1276 * This function will block the close until one of the following:
1277 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1278 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1279 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1280 *
1281 ************************************************************************/
1282
95da310e
AC		 1283static void mos7840_block_until_chase_response(struct tty_struct *tty,
1284 struct moschip_port *mos7840_port)
3f542974
PS		 1285{
1286 int timeout = 1 * HZ;
1287 int wait = 10;
1288 int count;
1289
1290 while (1) {
95da310e 1291 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1292
1293 /* Check for Buffer status */
880af9db 1294 if (count <= 0)
3f542974 1295 return;
3f542974
PS		 1296
1297 /* Block the thread for a while */
1298 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1299 timeout);
1300 /* No activity.. count down section */
1301 wait--;
1302 if (wait == 0) {
441b62c1 1303 dbg("%s - TIMEOUT", __func__);
3f542974
PS		 1304 return;
1305 } else {
dc0d5c1e 1306 /* Reset timeout value back to seconds */
3f542974
PS		 1307 wait = 10;
1308 }
1309 }
1310
1311}
1312
1313/*****************************************************************************
1314 * mos7840_break
1315 * this function sends a break to the port
1316 *****************************************************************************/
95da310e 1317static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1318{
95da310e 1319 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1320 unsigned char data;
1321 struct usb_serial *serial;
1322 struct moschip_port *mos7840_port;
1323
84fe6e79
TC		 1324 dbg("%s", "Entering ...........");
1325 dbg("mos7840_break: Start");
3f542974 1326
441b62c1 1327 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1328 dbg("%s", "Port Paranoia failed");
3f542974
PS		 1329 return;
1330 }
1331
441b62c1 1332 serial = mos7840_get_usb_serial(port, __func__);
3f542974 1333 if (!serial) {
84fe6e79 1334 dbg("%s", "Serial Paranoia failed");
3f542974
PS		 1335 return;
1336 }
1337
1338 mos7840_port = mos7840_get_port_private(port);
1339
880af9db 1340 if (mos7840_port == NULL)
3f542974 1341 return;
3f542974 1342
95da310e 1343 if (serial->dev)
3f542974 1344 /* flush and block until tx is empty */
95da310e 1345 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1346
95da310e 1347 if (break_state == -1)
3f542974 1348 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1349 else
3f542974 1350 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974 1351
6b447f04 1352 /* FIXME: no locking on shadowLCR anywhere in driver */
3f542974 1353 mos7840_port->shadowLCR = data;
84fe6e79 1354 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
3f542974
PS		 1355 mos7840_port->shadowLCR);
1356 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1357 mos7840_port->shadowLCR);
3f542974
PS		 1358}
1359
1360/*****************************************************************************
1361 * mos7840_write_room
1362 * this function is called by the tty driver when it wants to know how many
1363 * bytes of data we can accept for a specific port.
1364 * If successful, we return the amount of room that we have for this port
1365 * Otherwise we return a negative error number.
1366 *****************************************************************************/
1367
95da310e 1368static int mos7840_write_room(struct tty_struct *tty)
3f542974 1369{
95da310e 1370 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1371 int i;
1372 int room = 0;
0de9a702 1373 unsigned long flags;
3f542974
PS		 1374 struct moschip_port *mos7840_port;
1375
84fe6e79 1376 dbg("%s", " mos7840_write_room:entering ...........");
3f542974 1377
441b62c1 1378 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79
TC		 1379 dbg("%s", "Invalid port");
1380 dbg("%s", " mos7840_write_room:leaving ...........");
3f542974
PS		 1381 return -1;
1382 }
1383
1384 mos7840_port = mos7840_get_port_private(port);
1385 if (mos7840_port == NULL) {
84fe6e79 1386 dbg("%s", "mos7840_break:leaving ...........");
3f542974
PS		 1387 return -1;
1388 }
1389
0de9a702 1390 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1391 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1392 if (!mos7840_port->busy[i])
3f542974 1393 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1394 }
0de9a702 1395 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1396
0de9a702 1397 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
441b62c1 1398 dbg("%s - returns %d", __func__, room);
0de9a702 1399 return room;
3f542974
PS		 1400
1401}
1402
1403/*****************************************************************************
1404 * mos7840_write
1405 * this function is called by the tty driver when data should be written to
1406 * the port.
1407 * If successful, we return the number of bytes written, otherwise we
1408 * return a negative error number.
1409 *****************************************************************************/
1410
95da310e 1411static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1412 const unsigned char *data, int count)
1413{
1414 int status;
1415 int i;
1416 int bytes_sent = 0;
1417 int transfer_size;
0de9a702 1418 unsigned long flags;
3f542974
PS		 1419
1420 struct moschip_port *mos7840_port;
1421 struct usb_serial *serial;
1422 struct urb *urb;
880af9db 1423 /* __u16 Data; */
3f542974
PS		 1424 const unsigned char *current_position = data;
1425 unsigned char *data1;
84fe6e79
TC		 1426 dbg("%s", "entering ...........");
1427 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
880af9db 1428 mos7840_port->shadowLCR); */
3f542974
PS		 1429
1430#ifdef NOTMOS7840
1431 Data = 0x00;
3f542974
PS		 1432 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1433 mos7840_port->shadowLCR = Data;
84fe6e79
TC		 1434 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
1435 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
3f542974
PS		 1436 mos7840_port->shadowLCR);
1437
880af9db
AC		 1438 /* Data = 0x03; */
1439 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1440 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1441
880af9db 1442 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1443 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1444
880af9db
AC		 1445 /* Data = 0x0c; */
1446 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1447 Data = 0x00;
3f542974 1448 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
84fe6e79 1449 dbg("mos7840_write:DLL value is %x", Data);
3f542974
PS		 1450
1451 Data = 0x0;
3f542974 1452 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
84fe6e79 1453 dbg("mos7840_write:DLM value is %x", Data);
3f542974
PS		 1454
1455 Data = Data & ~SERIAL_LCR_DLAB;
84fe6e79 1456 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
3f542974 1457 mos7840_port->shadowLCR);
3f542974
PS		 1458 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1459#endif
1460
441b62c1 1461 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1462 dbg("%s", "Port Paranoia failed");
3f542974
PS		 1463 return -1;
1464 }
1465
1466 serial = port->serial;
441b62c1 1467 if (mos7840_serial_paranoia_check(serial, __func__)) {
84fe6e79 1468 dbg("%s", "Serial Paranoia failed");
3f542974
PS		 1469 return -1;
1470 }
1471
1472 mos7840_port = mos7840_get_port_private(port);
1473 if (mos7840_port == NULL) {
84fe6e79 1474 dbg("%s", "mos7840_port is NULL");
3f542974
PS		 1475 return -1;
1476 }
1477
1478 /* try to find a free urb in the list */
1479 urb = NULL;
1480
0de9a702 1481 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1482 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1483 if (!mos7840_port->busy[i]) {
1484 mos7840_port->busy[i] = 1;
3f542974 1485 urb = mos7840_port->write_urb_pool[i];
84fe6e79 1486 dbg("URB:%d", i);
3f542974
PS		 1487 break;
1488 }
1489 }
0de9a702 1490 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1491
1492 if (urb == NULL) {
441b62c1 1493 dbg("%s - no more free urbs", __func__);
3f542974
PS		 1494 goto exit;
1495 }
1496
1497 if (urb->transfer_buffer == NULL) {
1498 urb->transfer_buffer =
1499 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1500
1501 if (urb->transfer_buffer == NULL) {
194343d9
GKH		 1502 dev_err(&port->dev, "%s no more kernel memory...\n",
1503 __func__);
3f542974
PS		 1504 goto exit;
1505 }
1506 }
1507 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1508
97c4965d 1509 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1510
1511 /* fill urb with data and submit */
1512 usb_fill_bulk_urb(urb,
1513 serial->dev,
1514 usb_sndbulkpipe(serial->dev,
1515 port->bulk_out_endpointAddress),
1516 urb->transfer_buffer,
1517 transfer_size,
1518 mos7840_bulk_out_data_callback, mos7840_port);
1519
1520 data1 = urb->transfer_buffer;
84fe6e79 1521 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
3f542974
PS		 1522
1523 /* send it down the pipe */
1524 status = usb_submit_urb(urb, GFP_ATOMIC);
1525
1526 if (status) {
0de9a702 1527 mos7840_port->busy[i] = 0;
194343d9
GKH		 1528 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1529 "with status = %d\n", __func__, status);
3f542974
PS		 1530 bytes_sent = status;
1531 goto exit;
1532 }
1533 bytes_sent = transfer_size;
1534 mos7840_port->icount.tx += transfer_size;
0de9a702 1535 smp_wmb();
84fe6e79 1536 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
95da310e 1537exit:
3f542974
PS		 1538 return bytes_sent;
1539
1540}
1541
1542/*****************************************************************************
1543 * mos7840_throttle
1544 * this function is called by the tty driver when it wants to stop the data
1545 * being read from the port.
1546 *****************************************************************************/
1547
95da310e 1548static void mos7840_throttle(struct tty_struct *tty)
3f542974 1549{
95da310e 1550 struct usb_serial_port *port = tty->driver_data;
3f542974 1551 struct moschip_port *mos7840_port;
3f542974
PS		 1552 int status;
1553
441b62c1 1554 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1555 dbg("%s", "Invalid port");
3f542974
PS		 1556 return;
1557 }
1558
84fe6e79 1559 dbg("- port %d", port->number);
3f542974
PS		 1560
1561 mos7840_port = mos7840_get_port_private(port);
1562
1563 if (mos7840_port == NULL)
1564 return;
1565
1566 if (!mos7840_port->open) {
84fe6e79 1567 dbg("%s", "port not opened");
3f542974
PS		 1568 return;
1569 }
1570
84fe6e79 1571 dbg("%s", "Entering ..........");
3f542974 1572
3f542974
PS		 1573 /* if we are implementing XON/XOFF, send the stop character */
1574 if (I_IXOFF(tty)) {
1575 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1576 status = mos7840_write(tty, port, &stop_char, 1);
1577 if (status <= 0)
3f542974 1578 return;
3f542974 1579 }
3f542974
PS		 1580 /* if we are implementing RTS/CTS, toggle that line */
1581 if (tty->termios->c_cflag & CRTSCTS) {
1582 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1583 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1584 mos7840_port->shadowMCR);
95da310e 1585 if (status < 0)
3f542974 1586 return;
3f542974 1587 }
3f542974
PS		 1588}
1589
1590/*****************************************************************************
1591 * mos7840_unthrottle
880af9db
AC		 1592 * this function is called by the tty driver when it wants to resume
1593 * the data being read from the port (called after mos7840_throttle is
1594 * called)
3f542974 1595 *****************************************************************************/
95da310e 1596static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1597{
95da310e 1598 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1599 int status;
1600 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1601
441b62c1 1602 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1603 dbg("%s", "Invalid port");
3f542974
PS		 1604 return;
1605 }
1606
1607 if (mos7840_port == NULL)
1608 return;
1609
1610 if (!mos7840_port->open) {
441b62c1 1611 dbg("%s - port not opened", __func__);
3f542974
PS		 1612 return;
1613 }
1614
84fe6e79 1615 dbg("%s", "Entering ..........");
3f542974 1616
3f542974
PS		 1617 /* if we are implementing XON/XOFF, send the start character */
1618 if (I_IXOFF(tty)) {
1619 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1620 status = mos7840_write(tty, port, &start_char, 1);
1621 if (status <= 0)
3f542974 1622 return;
3f542974
PS		 1623 }
1624
1625 /* if we are implementing RTS/CTS, toggle that line */
1626 if (tty->termios->c_cflag & CRTSCTS) {
1627 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1628 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1629 mos7840_port->shadowMCR);
95da310e 1630 if (status < 0)
3f542974 1631 return;
3f542974 1632 }
3f542974
PS		 1633}
1634
95da310e 1635static int mos7840_tiocmget(struct tty_struct *tty, struct file *file)
3f542974 1636{
95da310e 1637 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1638 struct moschip_port *mos7840_port;
1639 unsigned int result;
1640 __u16 msr;
1641 __u16 mcr;
880af9db 1642 int status;
3f542974
PS		 1643 mos7840_port = mos7840_get_port_private(port);
1644
441b62c1 1645 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1646
1647 if (mos7840_port == NULL)
1648 return -ENODEV;
1649
1650 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1651 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1652 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1653 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1654 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1655 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1656 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1657 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1658 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1659
441b62c1 1660 dbg("%s - 0x%04X", __func__, result);
3f542974
PS		 1661
1662 return result;
1663}
1664
95da310e 1665static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
3f542974
PS		 1666 unsigned int set, unsigned int clear)
1667{
95da310e 1668 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1669 struct moschip_port *mos7840_port;
1670 unsigned int mcr;
87521c46 1671 int status;
3f542974 1672
441b62c1 1673 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1674
1675 mos7840_port = mos7840_get_port_private(port);
1676
1677 if (mos7840_port == NULL)
1678 return -ENODEV;
1679
e2984494 1680 /* FIXME: What locks the port registers ? */
3f542974
PS		 1681 mcr = mos7840_port->shadowMCR;
1682 if (clear & TIOCM_RTS)
1683 mcr &= ~MCR_RTS;
1684 if (clear & TIOCM_DTR)
1685 mcr &= ~MCR_DTR;
1686 if (clear & TIOCM_LOOP)
1687 mcr &= ~MCR_LOOPBACK;
1688
1689 if (set & TIOCM_RTS)
1690 mcr |= MCR_RTS;
1691 if (set & TIOCM_DTR)
1692 mcr |= MCR_DTR;
1693 if (set & TIOCM_LOOP)
1694 mcr |= MCR_LOOPBACK;
1695
1696 mos7840_port->shadowMCR = mcr;
1697
3f542974
PS		 1698 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1699 if (status < 0) {
84fe6e79 1700 dbg("setting MODEM_CONTROL_REGISTER Failed");
87521c46 1701 return status;
3f542974
PS		 1702 }
1703
1704 return 0;
1705}
1706
1707/*****************************************************************************
1708 * mos7840_calc_baud_rate_divisor
1709 * this function calculates the proper baud rate divisor for the specified
1710 * baud rate.
1711 *****************************************************************************/
1712static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
880af9db 1713 __u16 *clk_sel_val)
3f542974
PS		 1714{
1715
441b62c1 1716 dbg("%s - %d", __func__, baudRate);
3f542974
PS		 1717
1718 if (baudRate <= 115200) {
1719 *divisor = 115200 / baudRate;
1720 *clk_sel_val = 0x0;
1721 }
1722 if ((baudRate > 115200) && (baudRate <= 230400)) {
1723 *divisor = 230400 / baudRate;
1724 *clk_sel_val = 0x10;
1725 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1726 *divisor = 403200 / baudRate;
1727 *clk_sel_val = 0x20;
1728 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1729 *divisor = 460800 / baudRate;
1730 *clk_sel_val = 0x30;
1731 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1732 *divisor = 806400 / baudRate;
1733 *clk_sel_val = 0x40;
1734 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1735 *divisor = 921600 / baudRate;
1736 *clk_sel_val = 0x50;
1737 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1738 *divisor = 1572864 / baudRate;
1739 *clk_sel_val = 0x60;
1740 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1741 *divisor = 3145728 / baudRate;
1742 *clk_sel_val = 0x70;
1743 }
1744 return 0;
1745
1746#ifdef NOTMCS7840
1747
1748 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1749 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1750 *divisor = mos7840_divisor_table[i].Divisor;
1751 return 0;
1752 }
1753 }
1754
1755 /* After trying for all the standard baud rates *
1756 * Try calculating the divisor for this baud rate */
1757
1758 if (baudrate > 75 && baudrate < 230400) {
1759 /* get the divisor */
1760 custom = (__u16) (230400L / baudrate);
1761
1762 /* Check for round off */
1763 round1 = (__u16) (2304000L / baudrate);
1764 round = (__u16) (round1 - (custom * 10));
880af9db 1765 if (round > 4)
3f542974 1766 custom++;
3f542974
PS		 1767 *divisor = custom;
1768
84fe6e79 1769 dbg(" Baud %d = %d", baudrate, custom);
3f542974
PS		 1770 return 0;
1771 }
1772
84fe6e79 1773 dbg("%s", " Baud calculation Failed...");
3f542974
PS		 1774 return -1;
1775#endif
1776}
1777
1778/*****************************************************************************
1779 * mos7840_send_cmd_write_baud_rate
1780 * this function sends the proper command to change the baud rate of the
1781 * specified port.
1782 *****************************************************************************/
1783
1784static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1785 int baudRate)
1786{
1787 int divisor = 0;
1788 int status;
1789 __u16 Data;
1790 unsigned char number;
1791 __u16 clk_sel_val;
1792 struct usb_serial_port *port;
1793
1794 if (mos7840_port == NULL)
1795 return -1;
1796
1797 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 1798 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1799 dbg("%s", "Invalid port");
3f542974
PS		 1800 return -1;
1801 }
1802
441b62c1 1803 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
84fe6e79 1804 dbg("%s", "Invalid Serial");
3f542974
PS		 1805 return -1;
1806 }
1807
84fe6e79 1808 dbg("%s", "Entering ..........");
3f542974
PS		 1809
1810 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1811
441b62c1 1812 dbg("%s - port = %d, baud = %d", __func__,
3f542974 1813 mos7840_port->port->number, baudRate);
880af9db 1814 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1815 if (baudRate > 115200) {
1816#ifdef HW_flow_control
880af9db
AC		 1817 /* NOTE: need to see the pther register to modify */
1818 /* setting h/w flow control bit to 1 */
3f542974
PS		 1819 Data = 0x2b;
1820 mos7840_port->shadowMCR = Data;
880af9db
AC		 1821 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1822 Data);
3f542974 1823 if (status < 0) {
84fe6e79 1824 dbg("Writing spreg failed in set_serial_baud");
3f542974
PS		 1825 return -1;
1826 }
1827#endif
1828
1829 } else {
1830#ifdef HW_flow_control
880af9db 1831 / *setting h/w flow control bit to 0 */
3f542974
PS		 1832 Data = 0xb;
1833 mos7840_port->shadowMCR = Data;
880af9db
AC		 1834 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1835 Data);
3f542974 1836 if (status < 0) {
84fe6e79 1837 dbg("Writing spreg failed in set_serial_baud");
3f542974
PS		 1838 return -1;
1839 }
1840#endif
1841
1842 }
1843
880af9db 1844 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1845 clk_sel_val = 0x0;
1846 Data = 0x0;
880af9db 1847 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
3f542974 1848 &clk_sel_val);
880af9db
AC		 1849 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1850 &Data);
3f542974 1851 if (status < 0) {
84fe6e79 1852 dbg("reading spreg failed in set_serial_baud");
3f542974
PS		 1853 return -1;
1854 }
1855 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1856 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1857 Data);
3f542974 1858 if (status < 0) {
84fe6e79 1859 dbg("Writing spreg failed in set_serial_baud");
3f542974
PS		 1860 return -1;
1861 }
1862 /* Calculate the Divisor */
1863
1864 if (status) {
194343d9 1865 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1866 return status;
1867 }
1868 /* Enable access to divisor latch */
1869 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1870 mos7840_port->shadowLCR = Data;
1871 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1872
1873 /* Write the divisor */
1874 Data = (unsigned char)(divisor & 0xff);
84fe6e79 1875 dbg("set_serial_baud Value to write DLL is %x", Data);
3f542974
PS		 1876 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1877
1878 Data = (unsigned char)((divisor & 0xff00) >> 8);
84fe6e79 1879 dbg("set_serial_baud Value to write DLM is %x", Data);
3f542974
PS		 1880 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1881
1882 /* Disable access to divisor latch */
1883 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1884 mos7840_port->shadowLCR = Data;
1885 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1886
1887 }
3f542974
PS		 1888 return status;
1889}
1890
1891/*****************************************************************************
1892 * mos7840_change_port_settings
1893 * This routine is called to set the UART on the device to match
1894 * the specified new settings.
1895 *****************************************************************************/
1896
95da310e
AC		 1897static void mos7840_change_port_settings(struct tty_struct *tty,
1898 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1899{
3f542974
PS		 1900 int baud;
1901 unsigned cflag;
1902 unsigned iflag;
1903 __u8 lData;
1904 __u8 lParity;
1905 __u8 lStop;
1906 int status;
1907 __u16 Data;
1908 struct usb_serial_port *port;
1909 struct usb_serial *serial;
1910
1911 if (mos7840_port == NULL)
1912 return;
1913
1914 port = (struct usb_serial_port *)mos7840_port->port;
1915
441b62c1 1916 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1917 dbg("%s", "Invalid port");
3f542974
PS		 1918 return;
1919 }
1920
441b62c1 1921 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
84fe6e79 1922 dbg("%s", "Invalid Serial");
3f542974
PS		 1923 return;
1924 }
1925
1926 serial = port->serial;
1927
441b62c1 1928 dbg("%s - port %d", __func__, mos7840_port->port->number);
3f542974
PS		 1929
1930 if (!mos7840_port->open) {
441b62c1 1931 dbg("%s - port not opened", __func__);
3f542974
PS		 1932 return;
1933 }
1934
84fe6e79 1935 dbg("%s", "Entering ..........");
3f542974
PS		 1936
1937 lData = LCR_BITS_8;
1938 lStop = LCR_STOP_1;
1939 lParity = LCR_PAR_NONE;
1940
1941 cflag = tty->termios->c_cflag;
1942 iflag = tty->termios->c_iflag;
1943
1944 /* Change the number of bits */
1945 if (cflag & CSIZE) {
1946 switch (cflag & CSIZE) {
1947 case CS5:
1948 lData = LCR_BITS_5;
1949 break;
1950
1951 case CS6:
1952 lData = LCR_BITS_6;
1953 break;
1954
1955 case CS7:
1956 lData = LCR_BITS_7;
1957 break;
1958 default:
1959 case CS8:
1960 lData = LCR_BITS_8;
1961 break;
1962 }
1963 }
1964 /* Change the Parity bit */
1965 if (cflag & PARENB) {
1966 if (cflag & PARODD) {
1967 lParity = LCR_PAR_ODD;
441b62c1 1968 dbg("%s - parity = odd", __func__);
3f542974
PS		 1969 } else {
1970 lParity = LCR_PAR_EVEN;
441b62c1 1971 dbg("%s - parity = even", __func__);
3f542974
PS		 1972 }
1973
1974 } else {
441b62c1 1975 dbg("%s - parity = none", __func__);
3f542974
PS		 1976 }
1977
880af9db 1978 if (cflag & CMSPAR)
3f542974 1979 lParity = lParity | 0x20;
3f542974
PS		 1980
1981 /* Change the Stop bit */
1982 if (cflag & CSTOPB) {
1983 lStop = LCR_STOP_2;
441b62c1 1984 dbg("%s - stop bits = 2", __func__);
3f542974
PS		 1985 } else {
1986 lStop = LCR_STOP_1;
441b62c1 1987 dbg("%s - stop bits = 1", __func__);
3f542974
PS		 1988 }
1989
1990 /* Update the LCR with the correct value */
1991 mos7840_port->shadowLCR &=
1992 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1993 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1994
84fe6e79 1995 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
3f542974
PS		 1996 mos7840_port->shadowLCR);
1997 /* Disable Interrupts */
1998 Data = 0x00;
1999 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2000
2001 Data = 0x00;
2002 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2003
2004 Data = 0xcf;
2005 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2006
2007 /* Send the updated LCR value to the mos7840 */
2008 Data = mos7840_port->shadowLCR;
2009
2010 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2011
2012 Data = 0x00b;
2013 mos7840_port->shadowMCR = Data;
2014 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2015 Data = 0x00b;
2016 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2017
2018 /* set up the MCR register and send it to the mos7840 */
2019
2020 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 2021 if (cflag & CBAUD)
3f542974 2022 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 2023
880af9db 2024 if (cflag & CRTSCTS)
3f542974 2025 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 2026 else
3f542974 2027 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 2028
2029 Data = mos7840_port->shadowMCR;
2030 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2031
2032 /* Determine divisor based on baud rate */
2033 baud = tty_get_baud_rate(tty);
2034
2035 if (!baud) {
2036 /* pick a default, any default... */
84fe6e79 2037 dbg("%s", "Picked default baud...");
3f542974
PS		 2038 baud = 9600;
2039 }
2040
441b62c1 2041 dbg("%s - baud rate = %d", __func__, baud);
3f542974
PS		 2042 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2043
2044 /* Enable Interrupts */
2045 Data = 0x0c;
2046 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2047
50de36f7 2048 if (mos7840_port->read_urb_busy == false) {
3f542974 2049 mos7840_port->read_urb->dev = serial->dev;
50de36f7 2050 mos7840_port->read_urb_busy = true;
3f542974 2051 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
3f542974 2052 if (status) {
50de36f7 2053 dbg("usb_submit_urb(read bulk) failed, status = %d",
3f542974 2054 status);
50de36f7 2055 mos7840_port->read_urb_busy = false;
3f542974
PS		 2056 }
2057 }
2058 wake_up(&mos7840_port->delta_msr_wait);
2059 mos7840_port->delta_msr_cond = 1;
84fe6e79 2060 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
3f542974 2061 mos7840_port->shadowLCR);
3f542974
PS		 2062}
2063
2064/*****************************************************************************
2065 * mos7840_set_termios
2066 * this function is called by the tty driver when it wants to change
2067 * the termios structure
2068 *****************************************************************************/
2069
95da310e
AC		 2070static void mos7840_set_termios(struct tty_struct *tty,
2071 struct usb_serial_port *port,
606d099c 2072 struct ktermios *old_termios)
3f542974
PS		 2073{
2074 int status;
2075 unsigned int cflag;
2076 struct usb_serial *serial;
2077 struct moschip_port *mos7840_port;
84fe6e79 2078 dbg("mos7840_set_termios: START");
441b62c1 2079 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 2080 dbg("%s", "Invalid port");
3f542974
PS		 2081 return;
2082 }
2083
2084 serial = port->serial;
2085
441b62c1 2086 if (mos7840_serial_paranoia_check(serial, __func__)) {
84fe6e79 2087 dbg("%s", "Invalid Serial");
3f542974
PS		 2088 return;
2089 }
2090
2091 mos7840_port = mos7840_get_port_private(port);
2092
2093 if (mos7840_port == NULL)
2094 return;
2095
3f542974 2096 if (!mos7840_port->open) {
441b62c1 2097 dbg("%s - port not opened", __func__);
3f542974
PS		 2098 return;
2099 }
2100
84fe6e79 2101 dbg("%s", "setting termios - ");
3f542974
PS		 2102
2103 cflag = tty->termios->c_cflag;
2104
441b62c1 2105 dbg("%s - clfag %08x iflag %08x", __func__,
3f542974 2106 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
441b62c1 2107 dbg("%s - old clfag %08x old iflag %08x", __func__,
3d3ddce5 2108 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
441b62c1 2109 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 2110
2111 /* change the port settings to the new ones specified */
2112
95da310e 2113 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2114
2115 if (!mos7840_port->read_urb) {
84fe6e79 2116 dbg("%s", "URB KILLED !!!!!");
3f542974
PS		 2117 return;
2118 }
2119
50de36f7 2120 if (mos7840_port->read_urb_busy == false) {
3f542974 2121 mos7840_port->read_urb->dev = serial->dev;
50de36f7 2122 mos7840_port->read_urb_busy = true;
3f542974
PS		 2123 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2124 if (status) {
50de36f7 2125 dbg("usb_submit_urb(read bulk) failed, status = %d",
3f542974 2126 status);
50de36f7 2127 mos7840_port->read_urb_busy = false;
3f542974
PS		 2128 }
2129 }
3f542974
PS		 2130}
2131
2132/*****************************************************************************
2133 * mos7840_get_lsr_info - get line status register info
2134 *
2135 * Purpose: Let user call ioctl() to get info when the UART physically
2136 * is emptied. On bus types like RS485, the transmitter must
2137 * release the bus after transmitting. This must be done when
2138 * the transmit shift register is empty, not be done when the
2139 * transmit holding register is empty. This functionality
2140 * allows an RS485 driver to be written in user space.
2141 *****************************************************************************/
2142
95da310e 2143static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2144 unsigned int __user *value)
3f542974
PS		 2145{
2146 int count;
2147 unsigned int result = 0;
2148
95da310e 2149 count = mos7840_chars_in_buffer(tty);
3f542974 2150 if (count == 0) {
441b62c1 2151 dbg("%s -- Empty", __func__);
3f542974
PS		 2152 result = TIOCSER_TEMT;
2153 }
2154
2155 if (copy_to_user(value, &result, sizeof(int)))
2156 return -EFAULT;
2157 return 0;
2158}
2159
3f542974
PS		 2160/*****************************************************************************
2161 * mos7840_get_serial_info
2162 * function to get information about serial port
2163 *****************************************************************************/
2164
2165static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2166 struct serial_struct __user *retinfo)
3f542974
PS		 2167{
2168 struct serial_struct tmp;
2169
2170 if (mos7840_port == NULL)
2171 return -1;
2172
2173 if (!retinfo)
2174 return -EFAULT;
2175
2176 memset(&tmp, 0, sizeof(tmp));
2177
2178 tmp.type = PORT_16550A;
2179 tmp.line = mos7840_port->port->serial->minor;
2180 tmp.port = mos7840_port->port->number;
2181 tmp.irq = 0;
2182 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2183 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2184 tmp.baud_base = 9600;
2185 tmp.close_delay = 5 * HZ;
2186 tmp.closing_wait = 30 * HZ;
2187
2188 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2189 return -EFAULT;
2190 return 0;
2191}
2192
2193/*****************************************************************************
2194 * SerialIoctl
2195 * this function handles any ioctl calls to the driver
2196 *****************************************************************************/
2197
95da310e 2198static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
3f542974
PS		 2199 unsigned int cmd, unsigned long arg)
2200{
95da310e 2201 struct usb_serial_port *port = tty->driver_data;
97c4965d 2202 void __user *argp = (void __user *)arg;
3f542974 2203 struct moschip_port *mos7840_port;
3f542974
PS		 2204
2205 struct async_icount cnow;
2206 struct async_icount cprev;
2207 struct serial_icounter_struct icount;
3f542974 2208
441b62c1 2209 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 2210 dbg("%s", "Invalid port");
3f542974
PS		 2211 return -1;
2212 }
2213
2214 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2215
2216 if (mos7840_port == NULL)
2217 return -1;
2218
441b62c1 2219 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
3f542974
PS		 2220
2221 switch (cmd) {
2222 /* return number of bytes available */
2223
3f542974 2224 case TIOCSERGETLSR:
441b62c1 2225 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
95da310e 2226 return mos7840_get_lsr_info(tty, argp);
3f542974
PS		 2227 return 0;
2228
3f542974 2229 case TIOCGSERIAL:
441b62c1 2230 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
97c4965d 2231 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2232
2233 case TIOCSSERIAL:
441b62c1 2234 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
3f542974
PS		 2235 break;
2236
2237 case TIOCMIWAIT:
441b62c1 2238 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
3f542974
PS		 2239 cprev = mos7840_port->icount;
2240 while (1) {
880af9db 2241 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974
PS		 2242 mos7840_port->delta_msr_cond = 0;
2243 wait_event_interruptible(mos7840_port->delta_msr_wait,
2244 (mos7840_port->
2245 delta_msr_cond == 1));
2246
2247 /* see if a signal did it */
2248 if (signal_pending(current))
2249 return -ERESTARTSYS;
2250 cnow = mos7840_port->icount;
0de9a702 2251 smp_rmb();
3f542974
PS		 2252 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2253 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2254 return -EIO; /* no change => error */
2255 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2256 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2257 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2258 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2259 return 0;
2260 }
2261 cprev = cnow;
2262 }
2263 /* NOTREACHED */
2264 break;
2265
2266 case TIOCGICOUNT:
2267 cnow = mos7840_port->icount;
0de9a702 2268 smp_rmb();
3f542974
PS		 2269 icount.cts = cnow.cts;
2270 icount.dsr = cnow.dsr;
2271 icount.rng = cnow.rng;
2272 icount.dcd = cnow.dcd;
2273 icount.rx = cnow.rx;
2274 icount.tx = cnow.tx;
2275 icount.frame = cnow.frame;
2276 icount.overrun = cnow.overrun;
2277 icount.parity = cnow.parity;
2278 icount.brk = cnow.brk;
2279 icount.buf_overrun = cnow.buf_overrun;
2280
441b62c1 2281 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
3f542974 2282 port->number, icount.rx, icount.tx);
97c4965d 2283 if (copy_to_user(argp, &icount, sizeof(icount)))
3f542974
PS		 2284 return -EFAULT;
2285 return 0;
3f542974
PS		 2286 default:
2287 break;
2288 }
3f542974
PS		 2289 return -ENOIOCTLCMD;
2290}
2291
2292static int mos7840_calc_num_ports(struct usb_serial *serial)
2293{
0de9a702 2294 int mos7840_num_ports = 0;
3f542974 2295
84fe6e79
TC		 2296 dbg("numberofendpoints: cur %d, alt %d",
2297 (int)serial->interface->cur_altsetting->desc.bNumEndpoints,
3f542974
PS		 2298 (int)serial->interface->altsetting->desc.bNumEndpoints);
2299 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
0de9a702 2300 mos7840_num_ports = serial->num_ports = 2;
3f542974 2301 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
0de9a702
ON		 2302 serial->num_bulk_in = 4;
2303 serial->num_bulk_out = 4;
2304 mos7840_num_ports = serial->num_ports = 4;
3f542974 2305 }
84fe6e79 2306 dbg ("mos7840_num_ports = %d", mos7840_num_ports);
3f542974
PS		 2307 return mos7840_num_ports;
2308}
2309
2310/****************************************************************************
2311 * mos7840_startup
2312 ****************************************************************************/
2313
2314static int mos7840_startup(struct usb_serial *serial)
2315{
2316 struct moschip_port *mos7840_port;
2317 struct usb_device *dev;
2318 int i, status;
2319
2320 __u16 Data;
84fe6e79 2321 dbg("%s", "mos7840_startup :Entering..........");
3f542974
PS		 2322
2323 if (!serial) {
84fe6e79 2324 dbg("%s", "Invalid Handler");
3f542974
PS		 2325 return -1;
2326 }
2327
2328 dev = serial->dev;
2329
84fe6e79
TC		 2330 dbg("%s", "Entering...");
2331 dbg ("mos7840_startup: serial = %p", serial);
3f542974
PS		 2332
2333 /* we set up the pointers to the endpoints in the mos7840_open *
2334 * function, as the structures aren't created yet. */
2335
2336 /* set up port private structures */
2337 for (i = 0; i < serial->num_ports; ++i) {
84fe6e79 2338 dbg ("mos7840_startup: configuring port %d............", i);
7ac9da10 2339 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
3f542974 2340 if (mos7840_port == NULL) {
194343d9 2341 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
0de9a702
ON		 2342 status = -ENOMEM;
2343 i--; /* don't follow NULL pointer cleaning up */
2344 goto error;
3f542974 2345 }
3f542974 2346
880af9db
AC		 2347 /* Initialize all port interrupt end point to port 0 int
2348 * endpoint. Our device has only one interrupt end point
2349 * common to all port */
3f542974
PS		 2350
2351 mos7840_port->port = serial->port[i];
2352 mos7840_set_port_private(serial->port[i], mos7840_port);
0de9a702 2353 spin_lock_init(&mos7840_port->pool_lock);
3f542974 2354
37768adf
TC		 2355 /* minor is not initialised until later by
2356 * usb-serial.c:get_free_serial() and cannot therefore be used
2357 * to index device instances */
2358 mos7840_port->port_num = i + 1;
2359 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2360 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2361 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2362 dbg ("serial->minor = %d", serial->minor);
3f542974
PS		 2363
2364 if (mos7840_port->port_num == 1) {
2365 mos7840_port->SpRegOffset = 0x0;
2366 mos7840_port->ControlRegOffset = 0x1;
2367 mos7840_port->DcrRegOffset = 0x4;
2368 } else if ((mos7840_port->port_num == 2)
0de9a702 2369 && (serial->num_ports == 4)) {
3f542974
PS		 2370 mos7840_port->SpRegOffset = 0x8;
2371 mos7840_port->ControlRegOffset = 0x9;
2372 mos7840_port->DcrRegOffset = 0x16;
2373 } else if ((mos7840_port->port_num == 2)
0de9a702 2374 && (serial->num_ports == 2)) {
3f542974
PS		 2375 mos7840_port->SpRegOffset = 0xa;
2376 mos7840_port->ControlRegOffset = 0xb;
2377 mos7840_port->DcrRegOffset = 0x19;
2378 } else if ((mos7840_port->port_num == 3)
0de9a702 2379 && (serial->num_ports == 4)) {
3f542974
PS		 2380 mos7840_port->SpRegOffset = 0xa;
2381 mos7840_port->ControlRegOffset = 0xb;
2382 mos7840_port->DcrRegOffset = 0x19;
2383 } else if ((mos7840_port->port_num == 4)
0de9a702 2384 && (serial->num_ports == 4)) {
3f542974
PS		 2385 mos7840_port->SpRegOffset = 0xc;
2386 mos7840_port->ControlRegOffset = 0xd;
2387 mos7840_port->DcrRegOffset = 0x1c;
2388 }
2389 mos7840_dump_serial_port(mos7840_port);
3f542974
PS		 2390 mos7840_set_port_private(serial->port[i], mos7840_port);
2391
880af9db
AC		 2392 /* enable rx_disable bit in control register */
2393 status = mos7840_get_reg_sync(serial->port[i],
2394 mos7840_port->ControlRegOffset, &Data);
3f542974 2395 if (status < 0) {
84fe6e79 2396 dbg("Reading ControlReg failed status-0x%x", status);
3f542974
PS		 2397 break;
2398 } else
84fe6e79 2399 dbg("ControlReg Reading success val is %x, status%d",
3f542974 2400 Data, status);
880af9db
AC		 2401 Data |= 0x08; /* setting driver done bit */
2402 Data |= 0x04; /* sp1_bit to have cts change reflect in
2403 modem status reg */
3f542974 2404
880af9db
AC		 2405 /* Data |= 0x20; //rx_disable bit */
2406 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2407 mos7840_port->ControlRegOffset, Data);
2408 if (status < 0) {
84fe6e79 2409 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
3f542974
PS		 2410 break;
2411 } else
84fe6e79 2412 dbg("ControlReg Writing success(rx_disable) status%d",
3f542974
PS		 2413 status);
2414
880af9db
AC		 2415 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2416 and 0x24 in DCR3 */
3f542974 2417 Data = 0x01;
880af9db
AC		 2418 status = mos7840_set_reg_sync(serial->port[i],
2419 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
3f542974 2420 if (status < 0) {
84fe6e79 2421 dbg("Writing DCR0 failed status-0x%x", status);
3f542974
PS		 2422 break;
2423 } else
84fe6e79 2424 dbg("DCR0 Writing success status%d", status);
3f542974
PS		 2425
2426 Data = 0x05;
880af9db
AC		 2427 status = mos7840_set_reg_sync(serial->port[i],
2428 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
3f542974 2429 if (status < 0) {
84fe6e79 2430 dbg("Writing DCR1 failed status-0x%x", status);
3f542974
PS		 2431 break;
2432 } else
84fe6e79 2433 dbg("DCR1 Writing success status%d", status);
3f542974
PS		 2434
2435 Data = 0x24;
880af9db
AC		 2436 status = mos7840_set_reg_sync(serial->port[i],
2437 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
3f542974 2438 if (status < 0) {
84fe6e79 2439 dbg("Writing DCR2 failed status-0x%x", status);
3f542974
PS		 2440 break;
2441 } else
84fe6e79 2442 dbg("DCR2 Writing success status%d", status);
3f542974 2443
880af9db 2444 /* write values in clkstart0x0 and clkmulti 0x20 */
3f542974 2445 Data = 0x0;
880af9db 2446 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2447 CLK_START_VALUE_REGISTER, Data);
2448 if (status < 0) {
84fe6e79 2449 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
3f542974
PS		 2450 break;
2451 } else
84fe6e79 2452 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
3f542974
PS		 2453
2454 Data = 0x20;
880af9db
AC		 2455 status = mos7840_set_reg_sync(serial->port[i],
2456 CLK_MULTI_REGISTER, Data);
3f542974 2457 if (status < 0) {
84fe6e79 2458 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
3f542974 2459 status);
0de9a702 2460 goto error;
3f542974 2461 } else
84fe6e79 2462 dbg("CLK_MULTI_REGISTER Writing success status%d",
3f542974
PS		 2463 status);
2464
880af9db 2465 /* write value 0x0 to scratchpad register */
3f542974 2466 Data = 0x00;
880af9db
AC		 2467 status = mos7840_set_uart_reg(serial->port[i],
2468 SCRATCH_PAD_REGISTER, Data);
3f542974 2469 if (status < 0) {
84fe6e79 2470 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
3f542974
PS		 2471 status);
2472 break;
2473 } else
84fe6e79 2474 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
3f542974
PS		 2475 status);
2476
880af9db 2477 /* Zero Length flag register */
3f542974 2478 if ((mos7840_port->port_num != 1)
0de9a702 2479 && (serial->num_ports == 2)) {
3f542974
PS		 2480
2481 Data = 0xff;
3f542974 2482 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2483 (__u16) (ZLP_REG1 +
2484 ((__u16)mos7840_port->port_num)), Data);
84fe6e79 2485 dbg("ZLIP offset %x",
3f542974 2486 (__u16) (ZLP_REG1 +
880af9db 2487 ((__u16) mos7840_port->port_num)));
3f542974 2488 if (status < 0) {
84fe6e79 2489 dbg("Writing ZLP_REG%d failed status-0x%x",
3f542974
PS		 2490 i + 2, status);
2491 break;
2492 } else
84fe6e79 2493 dbg("ZLP_REG%d Writing success status%d",
3f542974
PS		 2494 i + 2, status);
2495 } else {
2496 Data = 0xff;
3f542974 2497 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2498 (__u16) (ZLP_REG1 +
2499 ((__u16)mos7840_port->port_num) - 0x1), Data);
84fe6e79 2500 dbg("ZLIP offset %x",
3f542974
PS		 2501 (__u16) (ZLP_REG1 +
2502 ((__u16) mos7840_port->port_num) - 0x1));
2503 if (status < 0) {
84fe6e79 2504 dbg("Writing ZLP_REG%d failed status-0x%x",
3f542974
PS		 2505 i + 1, status);
2506 break;
2507 } else
84fe6e79 2508 dbg("ZLP_REG%d Writing success status%d",
3f542974
PS		 2509 i + 1, status);
2510
2511 }
0de9a702 2512 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974 2513 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
880af9db
AC		 2514 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2515 GFP_KERNEL);
2516 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2517 !mos7840_port->dr) {
0de9a702
ON		 2518 status = -ENOMEM;
2519 goto error;
2520 }
3f542974 2521 }
84fe6e79 2522 dbg ("mos7840_startup: all ports configured...........");
3f542974 2523
880af9db 2524 /* Zero Length flag enable */
3f542974 2525 Data = 0x0f;
3f542974
PS		 2526 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2527 if (status < 0) {
84fe6e79 2528 dbg("Writing ZLP_REG5 failed status-0x%x", status);
7ced46c3 2529 goto error;
3f542974 2530 } else
84fe6e79 2531 dbg("ZLP_REG5 Writing success status%d", status);
3f542974
PS		 2532
2533 /* setting configuration feature to one */
2534 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
97c4965d 2535 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
3f542974 2536 return 0;
0de9a702
ON		 2537error:
2538 for (/* nothing */; i >= 0; i--) {
2539 mos7840_port = mos7840_get_port_private(serial->port[i]);
2540
2541 kfree(mos7840_port->dr);
2542 kfree(mos7840_port->ctrl_buf);
2543 usb_free_urb(mos7840_port->control_urb);
2544 kfree(mos7840_port);
2545 serial->port[i] = NULL;
2546 }
2547 return status;
3f542974
PS		 2548}
2549
2550/****************************************************************************
f9c99bb8 2551 * mos7840_disconnect
3f542974
PS		 2552 * This function is called whenever the device is removed from the usb bus.
2553 ****************************************************************************/
2554
f9c99bb8 2555static void mos7840_disconnect(struct usb_serial *serial)
3f542974
PS		 2556{
2557 int i;
0de9a702 2558 unsigned long flags;
3f542974 2559 struct moschip_port *mos7840_port;
f9c99bb8 2560 dbg("%s", " disconnect :entering..........");
3f542974
PS		 2561
2562 if (!serial) {
84fe6e79 2563 dbg("%s", "Invalid Handler");
3f542974
PS		 2564 return;
2565 }
2566
880af9db 2567 /* check for the ports to be closed,close the ports and disconnect */
3f542974
PS		 2568
2569 /* free private structure allocated for serial port *
2570 * stop reads and writes on all ports */
2571
2572 for (i = 0; i < serial->num_ports; ++i) {
2573 mos7840_port = mos7840_get_port_private(serial->port[i]);
37768adf
TC		 2574 dbg ("mos7840_port %d = %p", i, mos7840_port);
2575 if (mos7840_port) {
2576 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2577 mos7840_port->zombie = 1;
2578 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
2579 usb_kill_urb(mos7840_port->control_urb);
f9c99bb8
AS		 2580 }
2581 }
2582
2583 dbg("%s", "Thank u :: ");
2584
2585}
2586
2587/****************************************************************************
2588 * mos7840_release
2589 * This function is called when the usb_serial structure is freed.
2590 ****************************************************************************/
2591
2592static void mos7840_release(struct usb_serial *serial)
2593{
2594 int i;
2595 struct moschip_port *mos7840_port;
2596 dbg("%s", " release :entering..........");
2597
2598 if (!serial) {
2599 dbg("%s", "Invalid Handler");
2600 return;
2601 }
2602
2603 /* check for the ports to be closed,close the ports and disconnect */
2604
2605 /* free private structure allocated for serial port *
2606 * stop reads and writes on all ports */
2607
2608 for (i = 0; i < serial->num_ports; ++i) {
2609 mos7840_port = mos7840_get_port_private(serial->port[i]);
2610 dbg("mos7840_port %d = %p", i, mos7840_port);
2611 if (mos7840_port) {
37768adf
TC		 2612 kfree(mos7840_port->ctrl_buf);
2613 kfree(mos7840_port->dr);
2614 kfree(mos7840_port);
2615 }
3f542974
PS		 2616 }
2617
84fe6e79 2618 dbg("%s", "Thank u :: ");
3f542974
PS		 2619
2620}
2621
d9b1b787
JH		 2622static struct usb_driver io_driver = {
2623 .name = "mos7840",
2624 .probe = usb_serial_probe,
2625 .disconnect = usb_serial_disconnect,
2626 .id_table = moschip_id_table_combined,
2627 .no_dynamic_id = 1,
2628};
2629
3f542974
PS		 2630static struct usb_serial_driver moschip7840_4port_device = {
2631 .driver = {
2632 .owner = THIS_MODULE,
2633 .name = "mos7840",
2634 },
2635 .description = DRIVER_DESC,
d9b1b787 2636 .usb_driver = &io_driver,
3f542974 2637 .id_table = moschip_port_id_table,
3f542974 2638 .num_ports = 4,
3f542974
PS		 2639 .open = mos7840_open,
2640 .close = mos7840_close,
2641 .write = mos7840_write,
2642 .write_room = mos7840_write_room,
2643 .chars_in_buffer = mos7840_chars_in_buffer,
2644 .throttle = mos7840_throttle,
2645 .unthrottle = mos7840_unthrottle,
2646 .calc_num_ports = mos7840_calc_num_ports,
2647#ifdef MCSSerialProbe
2648 .probe = mos7840_serial_probe,
2649#endif
2650 .ioctl = mos7840_ioctl,
2651 .set_termios = mos7840_set_termios,
2652 .break_ctl = mos7840_break,
2653 .tiocmget = mos7840_tiocmget,
2654 .tiocmset = mos7840_tiocmset,
2655 .attach = mos7840_startup,
f9c99bb8
AS		 2656 .disconnect = mos7840_disconnect,
2657 .release = mos7840_release,
3f542974
PS		 2658 .read_bulk_callback = mos7840_bulk_in_callback,
2659 .read_int_callback = mos7840_interrupt_callback,
2660};
2661
3f542974
PS		 2662/****************************************************************************
2663 * moschip7840_init
2664 * This is called by the module subsystem, or on startup to initialize us
2665 ****************************************************************************/
2666static int __init moschip7840_init(void)
2667{
2668 int retval;
2669
84fe6e79 2670 dbg("%s", " mos7840_init :entering..........");
3f542974
PS		 2671
2672 /* Register with the usb serial */
2673 retval = usb_serial_register(&moschip7840_4port_device);
2674
2675 if (retval)
2676 goto failed_port_device_register;
2677
84fe6e79 2678 dbg("%s", "Entering...");
c197a8db
GKH		 2679 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2680 DRIVER_DESC "\n");
3f542974
PS		 2681
2682 /* Register with the usb */
2683 retval = usb_register(&io_driver);
3f542974 2684 if (retval == 0) {
84fe6e79 2685 dbg("%s", "Leaving...");
3f542974
PS		 2686 return 0;
2687 }
3f542974 2688 usb_serial_deregister(&moschip7840_4port_device);
880af9db 2689failed_port_device_register:
3f542974
PS		 2690 return retval;
2691}
2692
2693/****************************************************************************
2694 * moschip7840_exit
2695 * Called when the driver is about to be unloaded.
2696 ****************************************************************************/
2697static void __exit moschip7840_exit(void)
2698{
2699
84fe6e79 2700 dbg("%s", " mos7840_exit :entering..........");
3f542974
PS		 2701
2702 usb_deregister(&io_driver);
2703
2704 usb_serial_deregister(&moschip7840_4port_device);
2705
84fe6e79 2706 dbg("%s", "Entering...");
3f542974
PS		 2707}
2708
2709module_init(moschip7840_init);
2710module_exit(moschip7840_exit);
2711
2712/* Module information */
2713MODULE_DESCRIPTION(DRIVER_DESC);
2714MODULE_LICENSE("GPL");
2715
2716module_param(debug, bool, S_IRUGO | S_IWUSR);
2717MODULE_PARM_DESC(debug, "Debug enabled or not");
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