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Merge tag 'firewire-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...
[deliverable/linux.git] / drivers / usb / serial / mos7840.c
CommitLineData
3f542974
PS		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 *
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
18 *
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
22 *
23 */
24
25#include <linux/kernel.h>
26#include <linux/errno.h>
27#include <linux/init.h>
28#include <linux/slab.h>
29#include <linux/tty.h>
30#include <linux/tty_driver.h>
31#include <linux/tty_flip.h>
32#include <linux/module.h>
33#include <linux/serial.h>
34#include <linux/usb.h>
35#include <linux/usb/serial.h>
880af9db 36#include <linux/uaccess.h>
3f542974
PS		 37
38/*
39 * Version Information
40 */
37768adf 41#define DRIVER_VERSION "1.3.2"
3f542974
PS		 42#define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
43
44/*
45 * 16C50 UART register defines
46 */
47
48#define LCR_BITS_5 0x00 /* 5 bits/char */
49#define LCR_BITS_6 0x01 /* 6 bits/char */
50#define LCR_BITS_7 0x02 /* 7 bits/char */
51#define LCR_BITS_8 0x03 /* 8 bits/char */
52#define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
53
54#define LCR_STOP_1 0x00 /* 1 stop bit */
55#define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
56#define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
57#define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
58
59#define LCR_PAR_NONE 0x00 /* No parity */
60#define LCR_PAR_ODD 0x08 /* Odd parity */
61#define LCR_PAR_EVEN 0x18 /* Even parity */
62#define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
63#define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
64#define LCR_PAR_MASK 0x38 /* Mask for parity field */
65
66#define LCR_SET_BREAK 0x40 /* Set Break condition */
67#define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
68
69#define MCR_DTR 0x01 /* Assert DTR */
70#define MCR_RTS 0x02 /* Assert RTS */
71#define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
72#define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
73#define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
74#define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
75
76#define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
77#define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
78#define MOS7840_MSR_RI 0x40 /* Current state of RI */
79#define MOS7840_MSR_CD 0x80 /* Current state of CD */
80
81/*
82 * Defines used for sending commands to port
83 */
84
1e658489 85#define MOS_WDR_TIMEOUT 5000 /* default urb timeout */
3f542974
PS		 86
87#define MOS_PORT1 0x0200
88#define MOS_PORT2 0x0300
89#define MOS_VENREG 0x0000
90#define MOS_MAX_PORT 0x02
91#define MOS_WRITE 0x0E
92#define MOS_READ 0x0D
93
94/* Requests */
95#define MCS_RD_RTYPE 0xC0
96#define MCS_WR_RTYPE 0x40
97#define MCS_RDREQ 0x0D
98#define MCS_WRREQ 0x0E
99#define MCS_CTRL_TIMEOUT 500
100#define VENDOR_READ_LENGTH (0x01)
101
102#define MAX_NAME_LEN 64
103
880af9db
AC		 104#define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
105#define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
3f542974
PS		 106
107/* For higher baud Rates use TIOCEXBAUD */
108#define TIOCEXBAUD 0x5462
109
110/* vendor id and device id defines */
111
11e1abb4 112/* The native mos7840/7820 component */
3f542974
PS		 113#define USB_VENDOR_ID_MOSCHIP 0x9710
114#define MOSCHIP_DEVICE_ID_7840 0x7840
115#define MOSCHIP_DEVICE_ID_7820 0x7820
0eafe4de 116#define MOSCHIP_DEVICE_ID_7810 0x7810
11e1abb4
DL		 117/* The native component can have its vendor/device id's overridden
118 * in vendor-specific implementations. Such devices can be handled
68e24113 119 * by making a change here, in id_table.
11e1abb4 120 */
870408c8
DL		 121#define USB_VENDOR_ID_BANDB 0x0856
122#define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
123#define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
124#define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
125#define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
126#define BANDB_DEVICE_ID_US9ML2_2 0xAC29
127#define BANDB_DEVICE_ID_US9ML2_4 0xAC30
128#define BANDB_DEVICE_ID_USPTL4_2 0xAC31
129#define BANDB_DEVICE_ID_USPTL4_4 0xAC32
130#define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
131#define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
132#define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
133#define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
134#define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
3f542974 135
9d498bea
RL		 136/* This driver also supports
137 * ATEN UC2324 device using Moschip MCS7840
138 * ATEN UC2322 device using Moschip MCS7820
139 */
e9b8cffa
TC		 140#define USB_VENDOR_ID_ATENINTL 0x0557
141#define ATENINTL_DEVICE_ID_UC2324 0x2011
9d498bea 142#define ATENINTL_DEVICE_ID_UC2322 0x7820
e9b8cffa 143
11e1abb4 144/* Interrupt Routine Defines */
3f542974
PS		 145
146#define SERIAL_IIR_RLS 0x06
147#define SERIAL_IIR_MS 0x00
148
149/*
150 * Emulation of the bit mask on the LINE STATUS REGISTER.
151 */
152#define SERIAL_LSR_DR 0x0001
153#define SERIAL_LSR_OE 0x0002
154#define SERIAL_LSR_PE 0x0004
155#define SERIAL_LSR_FE 0x0008
156#define SERIAL_LSR_BI 0x0010
157
158#define MOS_MSR_DELTA_CTS 0x10
159#define MOS_MSR_DELTA_DSR 0x20
160#define MOS_MSR_DELTA_RI 0x40
161#define MOS_MSR_DELTA_CD 0x80
162
880af9db 163/* Serial Port register Address */
3f542974
PS		 164#define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
165#define FIFO_CONTROL_REGISTER ((__u16)(0x02))
166#define LINE_CONTROL_REGISTER ((__u16)(0x03))
167#define MODEM_CONTROL_REGISTER ((__u16)(0x04))
168#define LINE_STATUS_REGISTER ((__u16)(0x05))
169#define MODEM_STATUS_REGISTER ((__u16)(0x06))
170#define SCRATCH_PAD_REGISTER ((__u16)(0x07))
171#define DIVISOR_LATCH_LSB ((__u16)(0x00))
172#define DIVISOR_LATCH_MSB ((__u16)(0x01))
173
174#define CLK_MULTI_REGISTER ((__u16)(0x02))
175#define CLK_START_VALUE_REGISTER ((__u16)(0x03))
093ea2d3 176#define GPIO_REGISTER ((__u16)(0x07))
3f542974
PS		 177
178#define SERIAL_LCR_DLAB ((__u16)(0x0080))
179
180/*
181 * URB POOL related defines
182 */
183#define NUM_URBS 16 /* URB Count */
184#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
185
0eafe4de
D		 186/* LED on/off milliseconds*/
187#define LED_ON_MS 500
188#define LED_OFF_MS 500
189
190static int device_type;
3f542974 191
b9c87663 192static const struct usb_device_id id_table[] = {
3f542974
PS		 193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
0eafe4de 195 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
acf509ae 196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
870408c8 197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
acf509ae 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
870408c8 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
acf509ae
CB		 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
11e1abb4 204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
870408c8 205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
acf509ae 206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
870408c8 207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
27f1281d 208 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
e9b8cffa 209 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
9d498bea 210 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
3f542974
PS		 211 {} /* terminating entry */
212};
68e24113 213MODULE_DEVICE_TABLE(usb, id_table);
3f542974
PS		 214
215/* This structure holds all of the local port information */
216
217struct moschip_port {
218 int port_num; /*Actual port number in the device(1,2,etc) */
219 struct urb *write_urb; /* write URB for this port */
220 struct urb *read_urb; /* read URB for this port */
0de9a702 221 struct urb *int_urb;
3f542974
PS		 222 __u8 shadowLCR; /* last LCR value received */
223 __u8 shadowMCR; /* last MCR value received */
224 char open;
0de9a702
ON		 225 char open_ports;
226 char zombie;
3f542974
PS		 227 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
228 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
229 int delta_msr_cond;
230 struct async_icount icount;
231 struct usb_serial_port *port; /* loop back to the owner of this object */
232
880af9db 233 /* Offsets */
3f542974
PS		 234 __u8 SpRegOffset;
235 __u8 ControlRegOffset;
236 __u8 DcrRegOffset;
880af9db 237 /* for processing control URBS in interrupt context */
3f542974 238 struct urb *control_urb;
0de9a702 239 struct usb_ctrlrequest *dr;
3f542974
PS		 240 char *ctrl_buf;
241 int MsrLsr;
242
0de9a702 243 spinlock_t pool_lock;
3f542974 244 struct urb *write_urb_pool[NUM_URBS];
0de9a702 245 char busy[NUM_URBS];
50de36f7 246 bool read_urb_busy;
3f542974 247
0eafe4de
D		 248 /* For device(s) with LED indicator */
249 bool has_led;
250 bool led_flag;
251 struct timer_list led_timer1; /* Timer for LED on */
252 struct timer_list led_timer2; /* Timer for LED off */
253};
3f542974 254
3f542974
PS		 255/*
256 * mos7840_set_reg_sync
257 * To set the Control register by calling usb_fill_control_urb function
258 * by passing usb_sndctrlpipe function as parameter.
259 */
260
261static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
262 __u16 val)
263{
264 struct usb_device *dev = port->serial->dev;
265 val = val & 0x00ff;
9c134a14 266 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
3f542974
PS		 267
268 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
269 MCS_WR_RTYPE, val, reg, NULL, 0,
270 MOS_WDR_TIMEOUT);
271}
272
273/*
274 * mos7840_get_reg_sync
275 * To set the Uart register by calling usb_fill_control_urb function by
276 * passing usb_rcvctrlpipe function as parameter.
277 */
278
279static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
880af9db 280 __u16 *val)
3f542974
PS		 281{
282 struct usb_device *dev = port->serial->dev;
283 int ret = 0;
9e221a35
JH		 284 u8 *buf;
285
286 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
287 if (!buf)
288 return -ENOMEM;
3f542974
PS		 289
290 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 291 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
3f542974 292 MOS_WDR_TIMEOUT);
9e221a35 293 *val = buf[0];
9c134a14 294 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
9e221a35
JH		 295
296 kfree(buf);
3f542974
PS		 297 return ret;
298}
299
300/*
301 * mos7840_set_uart_reg
302 * To set the Uart register by calling usb_fill_control_urb function by
303 * passing usb_sndctrlpipe function as parameter.
304 */
305
306static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
307 __u16 val)
308{
309
310 struct usb_device *dev = port->serial->dev;
311 val = val & 0x00ff;
880af9db
AC		 312 /* For the UART control registers, the application number need
313 to be Or'ed */
0de9a702 314 if (port->serial->num_ports == 4) {
880af9db
AC		 315 val |= (((__u16) port->number -
316 (__u16) (port->serial->minor)) + 1) << 8;
3f542974
PS		 317 } else {
318 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 319 val |= (((__u16) port->number -
3f542974 320 (__u16) (port->serial->minor)) + 1) << 8;
3f542974 321 } else {
9c134a14 322 val |= (((__u16) port->number -
3f542974 323 (__u16) (port->serial->minor)) + 2) << 8;
3f542974
PS		 324 }
325 }
9c134a14 326 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
3f542974
PS		 327 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
328 MCS_WR_RTYPE, val, reg, NULL, 0,
329 MOS_WDR_TIMEOUT);
330
331}
332
333/*
334 * mos7840_get_uart_reg
335 * To set the Control register by calling usb_fill_control_urb function
336 * by passing usb_rcvctrlpipe function as parameter.
337 */
338static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
880af9db 339 __u16 *val)
3f542974
PS		 340{
341 struct usb_device *dev = port->serial->dev;
342 int ret = 0;
343 __u16 Wval;
9e221a35
JH		 344 u8 *buf;
345
346 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
347 if (!buf)
348 return -ENOMEM;
3f542974 349
880af9db 350 /* Wval is same as application number */
0de9a702 351 if (port->serial->num_ports == 4) {
3f542974
PS		 352 Wval =
353 (((__u16) port->number - (__u16) (port->serial->minor)) +
354 1) << 8;
3f542974
PS		 355 } else {
356 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 357 Wval = (((__u16) port->number -
3f542974 358 (__u16) (port->serial->minor)) + 1) << 8;
3f542974 359 } else {
880af9db 360 Wval = (((__u16) port->number -
3f542974 361 (__u16) (port->serial->minor)) + 2) << 8;
3f542974
PS		 362 }
363 }
9c134a14 364 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
3f542974 365 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 366 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
3f542974 367 MOS_WDR_TIMEOUT);
9e221a35
JH		 368 *val = buf[0];
369
370 kfree(buf);
3f542974
PS		 371 return ret;
372}
373
9c134a14
GKH		 374static void mos7840_dump_serial_port(struct usb_serial_port *port,
375 struct moschip_port *mos7840_port)
3f542974
PS		 376{
377
9c134a14
GKH		 378 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
379 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
380 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
3f542974
PS		 381
382}
383
384/************************************************************************/
385/************************************************************************/
386/* I N T E R F A C E F U N C T I O N S */
387/* I N T E R F A C E F U N C T I O N S */
388/************************************************************************/
389/************************************************************************/
390
391static inline void mos7840_set_port_private(struct usb_serial_port *port,
392 struct moschip_port *data)
393{
394 usb_set_serial_port_data(port, (void *)data);
395}
396
397static inline struct moschip_port *mos7840_get_port_private(struct
398 usb_serial_port
399 *port)
400{
401 return (struct moschip_port *)usb_get_serial_port_data(port);
402}
403
0de9a702 404static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
3f542974
PS		 405{
406 struct moschip_port *mos7840_port;
407 struct async_icount *icount;
408 mos7840_port = port;
409 icount = &mos7840_port->icount;
410 if (new_msr &
411 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
412 MOS_MSR_DELTA_CD)) {
413 icount = &mos7840_port->icount;
414
415 /* update input line counters */
416 if (new_msr & MOS_MSR_DELTA_CTS) {
417 icount->cts++;
0de9a702 418 smp_wmb();
3f542974
PS		 419 }
420 if (new_msr & MOS_MSR_DELTA_DSR) {
421 icount->dsr++;
0de9a702 422 smp_wmb();
3f542974
PS		 423 }
424 if (new_msr & MOS_MSR_DELTA_CD) {
425 icount->dcd++;
0de9a702 426 smp_wmb();
3f542974
PS		 427 }
428 if (new_msr & MOS_MSR_DELTA_RI) {
429 icount->rng++;
0de9a702 430 smp_wmb();
3f542974
PS		 431 }
432 }
3f542974
PS		 433}
434
0de9a702 435static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
3f542974
PS		 436{
437 struct async_icount *icount;
438
3f542974 439 if (new_lsr & SERIAL_LSR_BI) {
880af9db
AC		 440 /*
441 * Parity and Framing errors only count if they
442 * occur exclusive of a break being
443 * received.
444 */
3f542974
PS		 445 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
446 }
447
448 /* update input line counters */
449 icount = &port->icount;
450 if (new_lsr & SERIAL_LSR_BI) {
451 icount->brk++;
0de9a702 452 smp_wmb();
3f542974
PS		 453 }
454 if (new_lsr & SERIAL_LSR_OE) {
455 icount->overrun++;
0de9a702 456 smp_wmb();
3f542974
PS		 457 }
458 if (new_lsr & SERIAL_LSR_PE) {
459 icount->parity++;
0de9a702 460 smp_wmb();
3f542974
PS		 461 }
462 if (new_lsr & SERIAL_LSR_FE) {
463 icount->frame++;
0de9a702 464 smp_wmb();
3f542974 465 }
3f542974
PS		 466}
467
468/************************************************************************/
469/************************************************************************/
470/* U S B C A L L B A C K F U N C T I O N S */
471/* U S B C A L L B A C K F U N C T I O N S */
472/************************************************************************/
473/************************************************************************/
474
7d12e780 475static void mos7840_control_callback(struct urb *urb)
3f542974
PS		 476{
477 unsigned char *data;
478 struct moschip_port *mos7840_port;
9c134a14 479 struct device *dev = &urb->dev->dev;
3f542974 480 __u8 regval = 0x0;
0de9a702 481 int result = 0;
0643c724 482 int status = urb->status;
3f542974 483
cdc97792 484 mos7840_port = urb->context;
0de9a702 485
0643c724 486 switch (status) {
3f542974
PS		 487 case 0:
488 /* success */
489 break;
490 case -ECONNRESET:
491 case -ENOENT:
492 case -ESHUTDOWN:
493 /* this urb is terminated, clean up */
9c134a14 494 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
3f542974
PS		 495 return;
496 default:
9c134a14 497 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
3f542974
PS		 498 goto exit;
499 }
500
9c134a14
GKH		 501 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
502 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
503 mos7840_port->MsrLsr, mos7840_port->port_num);
3f542974
PS		 504 data = urb->transfer_buffer;
505 regval = (__u8) data[0];
9c134a14 506 dev_dbg(dev, "%s data is %x\n", __func__, regval);
3f542974
PS		 507 if (mos7840_port->MsrLsr == 0)
508 mos7840_handle_new_msr(mos7840_port, regval);
509 else if (mos7840_port->MsrLsr == 1)
510 mos7840_handle_new_lsr(mos7840_port, regval);
511
0de9a702
ON		 512exit:
513 spin_lock(&mos7840_port->pool_lock);
514 if (!mos7840_port->zombie)
515 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
516 spin_unlock(&mos7840_port->pool_lock);
517 if (result) {
9c134a14 518 dev_err(dev, "%s - Error %d submitting interrupt urb\n",
441b62c1 519 __func__, result);
0de9a702 520 }
3f542974
PS		 521}
522
523static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
880af9db 524 __u16 *val)
3f542974
PS		 525{
526 struct usb_device *dev = mcs->port->serial->dev;
0de9a702
ON		 527 struct usb_ctrlrequest *dr = mcs->dr;
528 unsigned char *buffer = mcs->ctrl_buf;
529 int ret;
3f542974 530
3f542974
PS		 531 dr->bRequestType = MCS_RD_RTYPE;
532 dr->bRequest = MCS_RDREQ;
880af9db 533 dr->wValue = cpu_to_le16(Wval); /* 0 */
3f542974
PS		 534 dr->wIndex = cpu_to_le16(reg);
535 dr->wLength = cpu_to_le16(2);
536
537 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
538 (unsigned char *)dr, buffer, 2,
539 mos7840_control_callback, mcs);
540 mcs->control_urb->transfer_buffer_length = 2;
541 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
542 return ret;
543}
544
0eafe4de
D		 545static void mos7840_set_led_callback(struct urb *urb)
546{
547 switch (urb->status) {
548 case 0:
549 /* Success */
550 break;
551 case -ECONNRESET:
552 case -ENOENT:
553 case -ESHUTDOWN:
554 /* This urb is terminated, clean up */
9c134a14
GKH		 555 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
556 __func__, urb->status);
0eafe4de
D		 557 break;
558 default:
9c134a14
GKH		 559 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
560 __func__, urb->status);
0eafe4de
D		 561 }
562}
563
564static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
565 __u16 reg)
566{
567 struct usb_device *dev = mcs->port->serial->dev;
568 struct usb_ctrlrequest *dr = mcs->dr;
569
570 dr->bRequestType = MCS_WR_RTYPE;
571 dr->bRequest = MCS_WRREQ;
572 dr->wValue = cpu_to_le16(wval);
573 dr->wIndex = cpu_to_le16(reg);
574 dr->wLength = cpu_to_le16(0);
575
576 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),
577 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
578
579 usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
580}
581
582static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
583 __u16 val)
584{
585 struct usb_device *dev = port->serial->dev;
586
587 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
588 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
589}
590
591static void mos7840_led_off(unsigned long arg)
592{
593 struct moschip_port *mcs = (struct moschip_port *) arg;
594
595 /* Turn off LED */
596 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
597 mod_timer(&mcs->led_timer2,
598 jiffies + msecs_to_jiffies(LED_OFF_MS));
599}
600
601static void mos7840_led_flag_off(unsigned long arg)
602{
603 struct moschip_port *mcs = (struct moschip_port *) arg;
604
605 mcs->led_flag = false;
606}
607
3f542974
PS		 608/*****************************************************************************
609 * mos7840_interrupt_callback
610 * this is the callback function for when we have received data on the
611 * interrupt endpoint.
612 *****************************************************************************/
613
7d12e780 614static void mos7840_interrupt_callback(struct urb *urb)
3f542974
PS		 615{
616 int result;
617 int length;
618 struct moschip_port *mos7840_port;
619 struct usb_serial *serial;
620 __u16 Data;
621 unsigned char *data;
622 __u8 sp[5], st;
0de9a702
ON		 623 int i, rv = 0;
624 __u16 wval, wreg = 0;
0643c724 625 int status = urb->status;
3f542974 626
0643c724 627 switch (status) {
3f542974
PS		 628 case 0:
629 /* success */
630 break;
631 case -ECONNRESET:
632 case -ENOENT:
633 case -ESHUTDOWN:
634 /* this urb is terminated, clean up */
9c134a14
GKH		 635 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
636 __func__, status);
3f542974
PS		 637 return;
638 default:
9c134a14
GKH		 639 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
640 __func__, status);
3f542974
PS		 641 goto exit;
642 }
643
644 length = urb->actual_length;
645 data = urb->transfer_buffer;
646
cdc97792 647 serial = urb->context;
3f542974
PS		 648
649 /* Moschip get 5 bytes
650 * Byte 1 IIR Port 1 (port.number is 0)
651 * Byte 2 IIR Port 2 (port.number is 1)
652 * Byte 3 IIR Port 3 (port.number is 2)
653 * Byte 4 IIR Port 4 (port.number is 3)
654 * Byte 5 FIFO status for both */
655
656 if (length && length > 5) {
9c134a14 657 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
3f542974
PS		 658 return;
659 }
660
661 sp[0] = (__u8) data[0];
662 sp[1] = (__u8) data[1];
663 sp[2] = (__u8) data[2];
664 sp[3] = (__u8) data[3];
665 st = (__u8) data[4];
666
667 for (i = 0; i < serial->num_ports; i++) {
668 mos7840_port = mos7840_get_port_private(serial->port[i]);
669 wval =
670 (((__u16) serial->port[i]->number -
671 (__u16) (serial->minor)) + 1) << 8;
672 if (mos7840_port->open) {
673 if (sp[i] & 0x01) {
9c134a14 674 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
3f542974
PS		 675 } else {
676 switch (sp[i] & 0x0f) {
677 case SERIAL_IIR_RLS:
9c134a14
GKH		 678 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
679 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
3f542974 680 mos7840_port->MsrLsr = 1;
0de9a702 681 wreg = LINE_STATUS_REGISTER;
3f542974
PS		 682 break;
683 case SERIAL_IIR_MS:
9c134a14 684 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
3f542974 685 mos7840_port->MsrLsr = 0;
0de9a702 686 wreg = MODEM_STATUS_REGISTER;
3f542974
PS		 687 break;
688 }
0de9a702
ON		 689 spin_lock(&mos7840_port->pool_lock);
690 if (!mos7840_port->zombie) {
691 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
692 } else {
693 spin_unlock(&mos7840_port->pool_lock);
694 return;
695 }
696 spin_unlock(&mos7840_port->pool_lock);
3f542974
PS		 697 }
698 }
699 }
880af9db
AC		 700 if (!(rv < 0))
701 /* the completion handler for the control urb will resubmit */
0de9a702
ON		 702 return;
703exit:
3f542974
PS		 704 result = usb_submit_urb(urb, GFP_ATOMIC);
705 if (result) {
706 dev_err(&urb->dev->dev,
707 "%s - Error %d submitting interrupt urb\n",
441b62c1 708 __func__, result);
3f542974 709 }
3f542974
PS		 710}
711
712static int mos7840_port_paranoia_check(struct usb_serial_port *port,
713 const char *function)
714{
715 if (!port) {
9c134a14 716 pr_debug("%s - port == NULL\n", function);
3f542974
PS		 717 return -1;
718 }
719 if (!port->serial) {
9c134a14 720 pr_debug("%s - port->serial == NULL\n", function);
3f542974
PS		 721 return -1;
722 }
723
724 return 0;
725}
726
727/* Inline functions to check the sanity of a pointer that is passed to us */
728static int mos7840_serial_paranoia_check(struct usb_serial *serial,
729 const char *function)
730{
731 if (!serial) {
9c134a14 732 pr_debug("%s - serial == NULL\n", function);
3f542974
PS		 733 return -1;
734 }
735 if (!serial->type) {
9c134a14 736 pr_debug("%s - serial->type == NULL!\n", function);
3f542974
PS		 737 return -1;
738 }
739
740 return 0;
741}
742
743static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
744 const char *function)
745{
746 /* if no port was specified, or it fails a paranoia check */
747 if (!port ||
748 mos7840_port_paranoia_check(port, function) ||
749 mos7840_serial_paranoia_check(port->serial, function)) {
880af9db
AC		 750 /* then say that we don't have a valid usb_serial thing,
751 * which will end up genrating -ENODEV return values */
3f542974
PS		 752 return NULL;
753 }
754
755 return port->serial;
756}
757
758/*****************************************************************************
759 * mos7840_bulk_in_callback
760 * this is the callback function for when we have received data on the
761 * bulk in endpoint.
762 *****************************************************************************/
763
7d12e780 764static void mos7840_bulk_in_callback(struct urb *urb)
3f542974 765{
0643c724 766 int retval;
3f542974
PS		 767 unsigned char *data;
768 struct usb_serial *serial;
769 struct usb_serial_port *port;
770 struct moschip_port *mos7840_port;
771 struct tty_struct *tty;
0643c724 772 int status = urb->status;
3f542974 773
cdc97792 774 mos7840_port = urb->context;
9c134a14 775 if (!mos7840_port)
50de36f7 776 return;
50de36f7
GKH		 777
778 if (status) {
9c134a14 779 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
50de36f7 780 mos7840_port->read_urb_busy = false;
3f542974
PS		 781 return;
782 }
783
9c134a14 784 port = mos7840_port->port;
441b62c1 785 if (mos7840_port_paranoia_check(port, __func__)) {
50de36f7 786 mos7840_port->read_urb_busy = false;
3f542974
PS		 787 return;
788 }
789
441b62c1 790 serial = mos7840_get_usb_serial(port, __func__);
3f542974 791 if (!serial) {
50de36f7 792 mos7840_port->read_urb_busy = false;
3f542974
PS		 793 return;
794 }
795
3f542974 796 data = urb->transfer_buffer;
59d33f2f 797 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
3f542974 798
3f542974 799 if (urb->actual_length) {
4a90f09b 800 tty = tty_port_tty_get(&mos7840_port->port->port);
3f542974 801 if (tty) {
3f542974 802 tty_insert_flip_string(tty, data, urb->actual_length);
3f542974 803 tty_flip_buffer_push(tty);
4a90f09b 804 tty_kref_put(tty);
3f542974
PS		 805 }
806 mos7840_port->icount.rx += urb->actual_length;
0de9a702 807 smp_wmb();
9c134a14 808 dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx);
3f542974
PS		 809 }
810
811 if (!mos7840_port->read_urb) {
9c134a14 812 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
50de36f7 813 mos7840_port->read_urb_busy = false;
3f542974
PS		 814 return;
815 }
816
0eafe4de
D		 817 /* Turn on LED */
818 if (mos7840_port->has_led && !mos7840_port->led_flag) {
819 mos7840_port->led_flag = true;
820 mos7840_set_led_async(mos7840_port, 0x0301,
821 MODEM_CONTROL_REGISTER);
822 mod_timer(&mos7840_port->led_timer1,
823 jiffies + msecs_to_jiffies(LED_ON_MS));
824 }
3f542974 825
50de36f7 826 mos7840_port->read_urb_busy = true;
0643c724 827 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
0de9a702 828
0643c724 829 if (retval) {
9c134a14 830 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
50de36f7 831 mos7840_port->read_urb_busy = false;
3f542974
PS		 832 }
833}
834
835/*****************************************************************************
836 * mos7840_bulk_out_data_callback
880af9db
AC		 837 * this is the callback function for when we have finished sending
838 * serial data on the bulk out endpoint.
3f542974
PS		 839 *****************************************************************************/
840
7d12e780 841static void mos7840_bulk_out_data_callback(struct urb *urb)
3f542974
PS		 842{
843 struct moschip_port *mos7840_port;
9c134a14 844 struct usb_serial_port *port;
3f542974 845 struct tty_struct *tty;
0643c724 846 int status = urb->status;
0de9a702
ON		 847 int i;
848
cdc97792 849 mos7840_port = urb->context;
9c134a14 850 port = mos7840_port->port;
0de9a702
ON		 851 spin_lock(&mos7840_port->pool_lock);
852 for (i = 0; i < NUM_URBS; i++) {
853 if (urb == mos7840_port->write_urb_pool[i]) {
854 mos7840_port->busy[i] = 0;
855 break;
856 }
857 }
858 spin_unlock(&mos7840_port->pool_lock);
859
0643c724 860 if (status) {
9c134a14 861 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
3f542974
PS		 862 return;
863 }
864
9c134a14 865 if (mos7840_port_paranoia_check(port, __func__))
3f542974 866 return;
3f542974 867
9c134a14 868 tty = tty_port_tty_get(&port->port);
b963a844
JS		 869 if (tty && mos7840_port->open)
870 tty_wakeup(tty);
4a90f09b 871 tty_kref_put(tty);
3f542974
PS		 872
873}
874
875/************************************************************************/
876/* 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 */
877/************************************************************************/
878#ifdef MCSSerialProbe
879static int mos7840_serial_probe(struct usb_serial *serial,
880 const struct usb_device_id *id)
881{
882
883 /*need to implement the mode_reg reading and updating\
884 structures usb_serial_ device_type\
885 (i.e num_ports, num_bulkin,bulkout etc) */
886 /* Also we can update the changes attach */
887 return 1;
888}
889#endif
890
891/*****************************************************************************
892 * mos7840_open
893 * this function is called by the tty driver when a port is opened
894 * If successful, we return 0
895 * Otherwise we return a negative error number.
896 *****************************************************************************/
897
a509a7e4 898static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
3f542974
PS		 899{
900 int response;
901 int j;
902 struct usb_serial *serial;
903 struct urb *urb;
904 __u16 Data;
905 int status;
906 struct moschip_port *mos7840_port;
0de9a702 907 struct moschip_port *port0;
3f542974 908
9c134a14 909 if (mos7840_port_paranoia_check(port, __func__))
3f542974 910 return -ENODEV;
3f542974 911
3f542974
PS		 912 serial = port->serial;
913
9c134a14 914 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 915 return -ENODEV;
3f542974
PS		 916
917 mos7840_port = mos7840_get_port_private(port);
0de9a702 918 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 919
0de9a702 920 if (mos7840_port == NULL || port0 == NULL)
3f542974
PS		 921 return -ENODEV;
922
923 usb_clear_halt(serial->dev, port->write_urb->pipe);
924 usb_clear_halt(serial->dev, port->read_urb->pipe);
0de9a702 925 port0->open_ports++;
3f542974
PS		 926
927 /* Initialising the write urb pool */
928 for (j = 0; j < NUM_URBS; ++j) {
0de9a702 929 urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974
PS		 930 mos7840_port->write_urb_pool[j] = urb;
931
932 if (urb == NULL) {
194343d9 933 dev_err(&port->dev, "No more urbs???\n");
3f542974
PS		 934 continue;
935 }
936
880af9db
AC		 937 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
938 GFP_KERNEL);
3f542974 939 if (!urb->transfer_buffer) {
0de9a702
ON		 940 usb_free_urb(urb);
941 mos7840_port->write_urb_pool[j] = NULL;
194343d9
GKH		 942 dev_err(&port->dev,
943 "%s-out of memory for urb buffers.\n",
944 __func__);
3f542974
PS		 945 continue;
946 }
947 }
948
949/*****************************************************************************
950 * Initialize MCS7840 -- Write Init values to corresponding Registers
951 *
952 * Register Index
953 * 1 : IER
954 * 2 : FCR
955 * 3 : LCR
956 * 4 : MCR
957 *
958 * 0x08 : SP1/2 Control Reg
959 *****************************************************************************/
960
880af9db 961 /* NEED to check the following Block */
3f542974 962
3f542974
PS		 963 Data = 0x0;
964 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
965 if (status < 0) {
9c134a14 966 dev_dbg(&port->dev, "Reading Spreg failed\n");
3f542974
PS		 967 return -1;
968 }
969 Data |= 0x80;
970 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
971 if (status < 0) {
9c134a14 972 dev_dbg(&port->dev, "writing Spreg failed\n");
3f542974
PS		 973 return -1;
974 }
975
976 Data &= ~0x80;
977 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
978 if (status < 0) {
9c134a14 979 dev_dbg(&port->dev, "writing Spreg failed\n");
3f542974
PS		 980 return -1;
981 }
880af9db 982 /* End of block to be checked */
3f542974 983
3f542974 984 Data = 0x0;
880af9db
AC		 985 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
986 &Data);
3f542974 987 if (status < 0) {
9c134a14 988 dev_dbg(&port->dev, "Reading Controlreg failed\n");
3f542974
PS		 989 return -1;
990 }
880af9db
AC		 991 Data |= 0x08; /* Driver done bit */
992 Data |= 0x20; /* rx_disable */
993 status = mos7840_set_reg_sync(port,
994 mos7840_port->ControlRegOffset, Data);
3f542974 995 if (status < 0) {
9c134a14 996 dev_dbg(&port->dev, "writing Controlreg failed\n");
3f542974
PS		 997 return -1;
998 }
880af9db
AC		 999 /* do register settings here */
1000 /* Set all regs to the device default values. */
1001 /***********************************
1002 * First Disable all interrupts.
1003 ***********************************/
3f542974 1004 Data = 0x00;
3f542974
PS		 1005 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1006 if (status < 0) {
9c134a14 1007 dev_dbg(&port->dev, "disabling interrupts failed\n");
3f542974
PS		 1008 return -1;
1009 }
880af9db 1010 /* Set FIFO_CONTROL_REGISTER to the default value */
3f542974 1011 Data = 0x00;
3f542974
PS		 1012 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1013 if (status < 0) {
9c134a14 1014 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
3f542974
PS		 1015 return -1;
1016 }
1017
1018 Data = 0xcf;
3f542974
PS		 1019 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1020 if (status < 0) {
9c134a14 1021 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
3f542974
PS		 1022 return -1;
1023 }
1024
1025 Data = 0x03;
3f542974
PS		 1026 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1027 mos7840_port->shadowLCR = Data;
1028
1029 Data = 0x0b;
3f542974
PS		 1030 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1031 mos7840_port->shadowMCR = Data;
1032
1033 Data = 0x00;
3f542974
PS		 1034 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1035 mos7840_port->shadowLCR = Data;
1036
880af9db 1037 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1038 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1039
1040 Data = 0x0c;
3f542974
PS		 1041 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1042
1043 Data = 0x0;
3f542974
PS		 1044 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1045
1046 Data = 0x00;
3f542974
PS		 1047 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1048
1049 Data = Data & ~SERIAL_LCR_DLAB;
3f542974
PS		 1050 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1051 mos7840_port->shadowLCR = Data;
1052
880af9db 1053 /* clearing Bulkin and Bulkout Fifo */
3f542974 1054 Data = 0x0;
3f542974
PS		 1055 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1056
1057 Data = Data | 0x0c;
3f542974
PS		 1058 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1059
1060 Data = Data & ~0x0c;
3f542974 1061 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
880af9db 1062 /* Finally enable all interrupts */
3f542974 1063 Data = 0x0c;
3f542974
PS		 1064 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1065
880af9db 1066 /* clearing rx_disable */
3f542974 1067 Data = 0x0;
880af9db
AC		 1068 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1069 &Data);
3f542974 1070 Data = Data & ~0x20;
880af9db
AC		 1071 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1072 Data);
3f542974 1073
880af9db 1074 /* rx_negate */
3f542974 1075 Data = 0x0;
880af9db
AC		 1076 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1077 &Data);
3f542974 1078 Data = Data | 0x10;
880af9db
AC		 1079 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1080 Data);
3f542974 1081
880af9db
AC		 1082 /* Check to see if we've set up our endpoint info yet *
1083 * (can't set it up in mos7840_startup as the structures *
1084 * were not set up at that time.) */
0de9a702 1085 if (port0->open_ports == 1) {
3f542974 1086 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1087 /* set up interrupt urb */
3f542974 1088 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1089 serial->dev,
1090 usb_rcvintpipe(serial->dev,
1091 serial->port[0]->interrupt_in_endpointAddress),
1092 serial->port[0]->interrupt_in_buffer,
1093 serial->port[0]->interrupt_in_urb->
1094 transfer_buffer_length,
1095 mos7840_interrupt_callback,
1096 serial,
1097 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1098
1099 /* start interrupt read for mos7840 *
1100 * will continue as long as mos7840 is connected */
1101
1102 response =
1103 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1104 GFP_KERNEL);
1105 if (response) {
194343d9
GKH		 1106 dev_err(&port->dev, "%s - Error %d submitting "
1107 "interrupt urb\n", __func__, response);
3f542974
PS		 1108 }
1109
1110 }
1111
1112 }
1113
1114 /* see if we've set up our endpoint info yet *
1115 * (can't set it up in mos7840_startup as the *
1116 * structures were not set up at that time.) */
1117
9c134a14
GKH		 1118 dev_dbg(&port->dev, "port number is %d\n", port->number);
1119 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor);
1120 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1121 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1122 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1123 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
3f542974
PS		 1124 mos7840_port->read_urb = port->read_urb;
1125
1126 /* set up our bulk in urb */
093ea2d3
DL		 1127 if ((serial->num_ports == 2)
1128 && ((((__u16)port->number -
1129 (__u16)(port->serial->minor)) % 2) != 0)) {
1130 usb_fill_bulk_urb(mos7840_port->read_urb,
1131 serial->dev,
1132 usb_rcvbulkpipe(serial->dev,
1133 (port->bulk_in_endpointAddress) + 2),
1134 port->bulk_in_buffer,
1135 mos7840_port->read_urb->transfer_buffer_length,
1136 mos7840_bulk_in_callback, mos7840_port);
1137 } else {
1138 usb_fill_bulk_urb(mos7840_port->read_urb,
1139 serial->dev,
1140 usb_rcvbulkpipe(serial->dev,
1141 port->bulk_in_endpointAddress),
1142 port->bulk_in_buffer,
1143 mos7840_port->read_urb->transfer_buffer_length,
1144 mos7840_bulk_in_callback, mos7840_port);
1145 }
3f542974 1146
9c134a14 1147 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
50de36f7 1148 mos7840_port->read_urb_busy = true;
3f542974
PS		 1149 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1150 if (response) {
194343d9
GKH		 1151 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1152 __func__, response);
50de36f7 1153 mos7840_port->read_urb_busy = false;
3f542974
PS		 1154 }
1155
1156 /* initialize our wait queues */
1157 init_waitqueue_head(&mos7840_port->wait_chase);
1158 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1159
1160 /* initialize our icount structure */
1161 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1162
1163 /* initialize our port settings */
880af9db
AC		 1164 /* Must set to enable ints! */
1165 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1166 /* send a open port command */
1167 mos7840_port->open = 1;
880af9db 1168 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974
PS		 1169 mos7840_port->icount.tx = 0;
1170 mos7840_port->icount.rx = 0;
1171
3f542974 1172 return 0;
3f542974
PS		 1173}
1174
1175/*****************************************************************************
1176 * mos7840_chars_in_buffer
1177 * this function is called by the tty driver when it wants to know how many
1178 * bytes of data we currently have outstanding in the port (data that has
1179 * been written, but hasn't made it out the port yet)
1180 * If successful, we return the number of bytes left to be written in the
1181 * system,
95da310e 1182 * Otherwise we return zero.
3f542974
PS		 1183 *****************************************************************************/
1184
95da310e 1185static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1186{
95da310e 1187 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1188 int i;
1189 int chars = 0;
0de9a702 1190 unsigned long flags;
3f542974
PS		 1191 struct moschip_port *mos7840_port;
1192
9c134a14 1193 if (mos7840_port_paranoia_check(port, __func__))
95da310e 1194 return 0;
3f542974
PS		 1195
1196 mos7840_port = mos7840_get_port_private(port);
3363155b 1197 if (mos7840_port == NULL)
95da310e 1198 return 0;
3f542974 1199
880af9db 1200 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
5c263b92
MF		 1201 for (i = 0; i < NUM_URBS; ++i) {
1202 if (mos7840_port->busy[i]) {
1203 struct urb *urb = mos7840_port->write_urb_pool[i];
1204 chars += urb->transfer_buffer_length;
1205 }
1206 }
880af9db 1207 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
9c134a14 1208 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
0de9a702 1209 return chars;
3f542974
PS		 1210
1211}
1212
3f542974
PS		 1213/*****************************************************************************
1214 * mos7840_close
1215 * this function is called by the tty driver when a port is closed
1216 *****************************************************************************/
1217
335f8514 1218static void mos7840_close(struct usb_serial_port *port)
3f542974
PS		 1219{
1220 struct usb_serial *serial;
1221 struct moschip_port *mos7840_port;
0de9a702 1222 struct moschip_port *port0;
3f542974
PS		 1223 int j;
1224 __u16 Data;
1225
9c134a14 1226 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1227 return;
3f542974 1228
441b62c1 1229 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1230 if (!serial)
3f542974 1231 return;
3f542974
PS		 1232
1233 mos7840_port = mos7840_get_port_private(port);
0de9a702 1234 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1235
0de9a702 1236 if (mos7840_port == NULL || port0 == NULL)
3f542974 1237 return;
3f542974
PS		 1238
1239 for (j = 0; j < NUM_URBS; ++j)
1240 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1241
1242 /* Freeing Write URBs */
1243 for (j = 0; j < NUM_URBS; ++j) {
1244 if (mos7840_port->write_urb_pool[j]) {
1245 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1246 kfree(mos7840_port->write_urb_pool[j]->
1247 transfer_buffer);
1248
1249 usb_free_urb(mos7840_port->write_urb_pool[j]);
1250 }
1251 }
1252
3f542974
PS		 1253 /* While closing port, shutdown all bulk read, write *
1254 * and interrupt read if they exists */
1255 if (serial->dev) {
3f542974 1256 if (mos7840_port->write_urb) {
9c134a14 1257 dev_dbg(&port->dev, "%s", "Shutdown bulk write\n");
3f542974
PS		 1258 usb_kill_urb(mos7840_port->write_urb);
1259 }
3f542974 1260 if (mos7840_port->read_urb) {
9c134a14 1261 dev_dbg(&port->dev, "%s", "Shutdown bulk read\n");
3f542974 1262 usb_kill_urb(mos7840_port->read_urb);
50de36f7 1263 mos7840_port->read_urb_busy = false;
3f542974
PS		 1264 }
1265 if ((&mos7840_port->control_urb)) {
9c134a14 1266 dev_dbg(&port->dev, "%s", "Shutdown control read\n");
880af9db 1267 /*/ usb_kill_urb (mos7840_port->control_urb); */
3f542974
PS		 1268 }
1269 }
880af9db
AC		 1270/* if(mos7840_port->ctrl_buf != NULL) */
1271/* kfree(mos7840_port->ctrl_buf); */
0de9a702 1272 port0->open_ports--;
9c134a14 1273 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number);
0de9a702 1274 if (port0->open_ports == 0) {
3f542974 1275 if (serial->port[0]->interrupt_in_urb) {
9c134a14 1276 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
0de9a702 1277 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1278 }
1279 }
1280
1281 if (mos7840_port->write_urb) {
1282 /* if this urb had a transfer buffer already (old tx) free it */
880af9db 1283 if (mos7840_port->write_urb->transfer_buffer != NULL)
3f542974 1284 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1285 usb_free_urb(mos7840_port->write_urb);
1286 }
1287
1288 Data = 0x0;
1289 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1290
1291 Data = 0x00;
1292 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1293
1294 mos7840_port->open = 0;
3f542974
PS		 1295}
1296
1297/************************************************************************
1298 *
1299 * mos7840_block_until_chase_response
1300 *
1301 * This function will block the close until one of the following:
1302 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1303 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1304 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1305 *
1306 ************************************************************************/
1307
95da310e
AC		 1308static void mos7840_block_until_chase_response(struct tty_struct *tty,
1309 struct moschip_port *mos7840_port)
3f542974 1310{
1e658489 1311 int timeout = msecs_to_jiffies(1000);
3f542974
PS		 1312 int wait = 10;
1313 int count;
1314
1315 while (1) {
95da310e 1316 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1317
1318 /* Check for Buffer status */
880af9db 1319 if (count <= 0)
3f542974 1320 return;
3f542974
PS		 1321
1322 /* Block the thread for a while */
1323 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1324 timeout);
1325 /* No activity.. count down section */
1326 wait--;
1327 if (wait == 0) {
9c134a14 1328 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__);
3f542974
PS		 1329 return;
1330 } else {
dc0d5c1e 1331 /* Reset timeout value back to seconds */
3f542974
PS		 1332 wait = 10;
1333 }
1334 }
1335
1336}
1337
1338/*****************************************************************************
1339 * mos7840_break
1340 * this function sends a break to the port
1341 *****************************************************************************/
95da310e 1342static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1343{
95da310e 1344 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1345 unsigned char data;
1346 struct usb_serial *serial;
1347 struct moschip_port *mos7840_port;
1348
9c134a14 1349 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1350 return;
3f542974 1351
441b62c1 1352 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1353 if (!serial)
3f542974 1354 return;
3f542974
PS		 1355
1356 mos7840_port = mos7840_get_port_private(port);
1357
880af9db 1358 if (mos7840_port == NULL)
3f542974 1359 return;
3f542974 1360
95da310e 1361 if (serial->dev)
3f542974 1362 /* flush and block until tx is empty */
95da310e 1363 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1364
95da310e 1365 if (break_state == -1)
3f542974 1366 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1367 else
3f542974 1368 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974 1369
6b447f04 1370 /* FIXME: no locking on shadowLCR anywhere in driver */
3f542974 1371 mos7840_port->shadowLCR = data;
9c134a14 1372 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1373 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1374 mos7840_port->shadowLCR);
3f542974
PS		 1375}
1376
1377/*****************************************************************************
1378 * mos7840_write_room
1379 * this function is called by the tty driver when it wants to know how many
1380 * bytes of data we can accept for a specific port.
1381 * If successful, we return the amount of room that we have for this port
1382 * Otherwise we return a negative error number.
1383 *****************************************************************************/
1384
95da310e 1385static int mos7840_write_room(struct tty_struct *tty)
3f542974 1386{
95da310e 1387 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1388 int i;
1389 int room = 0;
0de9a702 1390 unsigned long flags;
3f542974
PS		 1391 struct moschip_port *mos7840_port;
1392
9c134a14 1393 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1394 return -1;
3f542974
PS		 1395
1396 mos7840_port = mos7840_get_port_private(port);
9c134a14 1397 if (mos7840_port == NULL)
3f542974 1398 return -1;
3f542974 1399
0de9a702 1400 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1401 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1402 if (!mos7840_port->busy[i])
3f542974 1403 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1404 }
0de9a702 1405 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1406
0de9a702 1407 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
9c134a14 1408 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
0de9a702 1409 return room;
3f542974
PS		 1410
1411}
1412
1413/*****************************************************************************
1414 * mos7840_write
1415 * this function is called by the tty driver when data should be written to
1416 * the port.
1417 * If successful, we return the number of bytes written, otherwise we
1418 * return a negative error number.
1419 *****************************************************************************/
1420
95da310e 1421static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1422 const unsigned char *data, int count)
1423{
1424 int status;
1425 int i;
1426 int bytes_sent = 0;
1427 int transfer_size;
0de9a702 1428 unsigned long flags;
3f542974
PS		 1429
1430 struct moschip_port *mos7840_port;
1431 struct usb_serial *serial;
1432 struct urb *urb;
880af9db 1433 /* __u16 Data; */
3f542974
PS		 1434 const unsigned char *current_position = data;
1435 unsigned char *data1;
3f542974
PS		 1436
1437#ifdef NOTMOS7840
1438 Data = 0x00;
3f542974
PS		 1439 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1440 mos7840_port->shadowLCR = Data;
9c134a14
GKH		 1441 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1442 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974 1443
880af9db
AC		 1444 /* Data = 0x03; */
1445 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1446 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1447
880af9db 1448 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1449 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1450
880af9db
AC		 1451 /* Data = 0x0c; */
1452 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1453 Data = 0x00;
3f542974 1454 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
9c134a14 1455 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
3f542974
PS		 1456
1457 Data = 0x0;
3f542974 1458 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
9c134a14 1459 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
3f542974
PS		 1460
1461 Data = Data & ~SERIAL_LCR_DLAB;
9c134a14 1462 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1463 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1464#endif
1465
9c134a14 1466 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1467 return -1;
3f542974
PS		 1468
1469 serial = port->serial;
9c134a14 1470 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 1471 return -1;
3f542974
PS		 1472
1473 mos7840_port = mos7840_get_port_private(port);
9c134a14 1474 if (mos7840_port == NULL)
3f542974 1475 return -1;
3f542974
PS		 1476
1477 /* try to find a free urb in the list */
1478 urb = NULL;
1479
0de9a702 1480 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1481 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1482 if (!mos7840_port->busy[i]) {
1483 mos7840_port->busy[i] = 1;
3f542974 1484 urb = mos7840_port->write_urb_pool[i];
9c134a14 1485 dev_dbg(&port->dev, "URB:%d\n", i);
3f542974
PS		 1486 break;
1487 }
1488 }
0de9a702 1489 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1490
1491 if (urb == NULL) {
9c134a14 1492 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
3f542974
PS		 1493 goto exit;
1494 }
1495
1496 if (urb->transfer_buffer == NULL) {
1497 urb->transfer_buffer =
1498 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1499
1500 if (urb->transfer_buffer == NULL) {
22a416c4 1501 dev_err_console(port, "%s no more kernel memory...\n",
194343d9 1502 __func__);
3f542974
PS		 1503 goto exit;
1504 }
1505 }
1506 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1507
97c4965d 1508 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1509
1510 /* fill urb with data and submit */
093ea2d3
DL		 1511 if ((serial->num_ports == 2)
1512 && ((((__u16)port->number -
1513 (__u16)(port->serial->minor)) % 2) != 0)) {
1514 usb_fill_bulk_urb(urb,
1515 serial->dev,
1516 usb_sndbulkpipe(serial->dev,
1517 (port->bulk_out_endpointAddress) + 2),
1518 urb->transfer_buffer,
1519 transfer_size,
1520 mos7840_bulk_out_data_callback, mos7840_port);
1521 } else {
1522 usb_fill_bulk_urb(urb,
1523 serial->dev,
1524 usb_sndbulkpipe(serial->dev,
1525 port->bulk_out_endpointAddress),
1526 urb->transfer_buffer,
1527 transfer_size,
1528 mos7840_bulk_out_data_callback, mos7840_port);
1529 }
3f542974
PS		 1530
1531 data1 = urb->transfer_buffer;
9c134a14 1532 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
3f542974 1533
0eafe4de
D		 1534 /* Turn on LED */
1535 if (mos7840_port->has_led && !mos7840_port->led_flag) {
1536 mos7840_port->led_flag = true;
1537 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);
1538 mod_timer(&mos7840_port->led_timer1,
1539 jiffies + msecs_to_jiffies(LED_ON_MS));
1540 }
1541
3f542974
PS		 1542 /* send it down the pipe */
1543 status = usb_submit_urb(urb, GFP_ATOMIC);
1544
1545 if (status) {
0de9a702 1546 mos7840_port->busy[i] = 0;
22a416c4 1547 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
194343d9 1548 "with status = %d\n", __func__, status);
3f542974
PS		 1549 bytes_sent = status;
1550 goto exit;
1551 }
1552 bytes_sent = transfer_size;
1553 mos7840_port->icount.tx += transfer_size;
0de9a702 1554 smp_wmb();
9c134a14 1555 dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
95da310e 1556exit:
3f542974
PS		 1557 return bytes_sent;
1558
1559}
1560
1561/*****************************************************************************
1562 * mos7840_throttle
1563 * this function is called by the tty driver when it wants to stop the data
1564 * being read from the port.
1565 *****************************************************************************/
1566
95da310e 1567static void mos7840_throttle(struct tty_struct *tty)
3f542974 1568{
95da310e 1569 struct usb_serial_port *port = tty->driver_data;
3f542974 1570 struct moschip_port *mos7840_port;
3f542974
PS		 1571 int status;
1572
9c134a14 1573 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1574 return;
3f542974
PS		 1575
1576 mos7840_port = mos7840_get_port_private(port);
1577
1578 if (mos7840_port == NULL)
1579 return;
1580
1581 if (!mos7840_port->open) {
9c134a14 1582 dev_dbg(&port->dev, "%s", "port not opened\n");
3f542974
PS		 1583 return;
1584 }
1585
3f542974
PS		 1586 /* if we are implementing XON/XOFF, send the stop character */
1587 if (I_IXOFF(tty)) {
1588 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1589 status = mos7840_write(tty, port, &stop_char, 1);
1590 if (status <= 0)
3f542974 1591 return;
3f542974 1592 }
3f542974 1593 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1594 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1595 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1596 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1597 mos7840_port->shadowMCR);
95da310e 1598 if (status < 0)
3f542974 1599 return;
3f542974 1600 }
3f542974
PS		 1601}
1602
1603/*****************************************************************************
1604 * mos7840_unthrottle
880af9db
AC		 1605 * this function is called by the tty driver when it wants to resume
1606 * the data being read from the port (called after mos7840_throttle is
1607 * called)
3f542974 1608 *****************************************************************************/
95da310e 1609static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1610{
95da310e 1611 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1612 int status;
1613 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1614
9c134a14 1615 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1616 return;
3f542974
PS		 1617
1618 if (mos7840_port == NULL)
1619 return;
1620
1621 if (!mos7840_port->open) {
9c134a14 1622 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1623 return;
1624 }
1625
3f542974
PS		 1626 /* if we are implementing XON/XOFF, send the start character */
1627 if (I_IXOFF(tty)) {
1628 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1629 status = mos7840_write(tty, port, &start_char, 1);
1630 if (status <= 0)
3f542974 1631 return;
3f542974
PS		 1632 }
1633
1634 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1635 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1636 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1637 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1638 mos7840_port->shadowMCR);
95da310e 1639 if (status < 0)
3f542974 1640 return;
3f542974 1641 }
3f542974
PS		 1642}
1643
60b33c13 1644static int mos7840_tiocmget(struct tty_struct *tty)
3f542974 1645{
95da310e 1646 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1647 struct moschip_port *mos7840_port;
1648 unsigned int result;
1649 __u16 msr;
1650 __u16 mcr;
880af9db 1651 int status;
3f542974
PS		 1652 mos7840_port = mos7840_get_port_private(port);
1653
3f542974
PS		 1654 if (mos7840_port == NULL)
1655 return -ENODEV;
1656
1657 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1658 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1659 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1660 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1661 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1662 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1663 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1664 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1665 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1666
9c134a14 1667 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
3f542974
PS		 1668
1669 return result;
1670}
1671
20b9d177 1672static int mos7840_tiocmset(struct tty_struct *tty,
3f542974
PS		 1673 unsigned int set, unsigned int clear)
1674{
95da310e 1675 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1676 struct moschip_port *mos7840_port;
1677 unsigned int mcr;
87521c46 1678 int status;
3f542974 1679
3f542974
PS		 1680 mos7840_port = mos7840_get_port_private(port);
1681
1682 if (mos7840_port == NULL)
1683 return -ENODEV;
1684
e2984494 1685 /* FIXME: What locks the port registers ? */
3f542974
PS		 1686 mcr = mos7840_port->shadowMCR;
1687 if (clear & TIOCM_RTS)
1688 mcr &= ~MCR_RTS;
1689 if (clear & TIOCM_DTR)
1690 mcr &= ~MCR_DTR;
1691 if (clear & TIOCM_LOOP)
1692 mcr &= ~MCR_LOOPBACK;
1693
1694 if (set & TIOCM_RTS)
1695 mcr |= MCR_RTS;
1696 if (set & TIOCM_DTR)
1697 mcr |= MCR_DTR;
1698 if (set & TIOCM_LOOP)
1699 mcr |= MCR_LOOPBACK;
1700
1701 mos7840_port->shadowMCR = mcr;
1702
3f542974
PS		 1703 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1704 if (status < 0) {
9c134a14 1705 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
87521c46 1706 return status;
3f542974
PS		 1707 }
1708
1709 return 0;
1710}
1711
1712/*****************************************************************************
1713 * mos7840_calc_baud_rate_divisor
1714 * this function calculates the proper baud rate divisor for the specified
1715 * baud rate.
1716 *****************************************************************************/
9c134a14
GKH		 1717static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1718 int baudRate, int *divisor,
880af9db 1719 __u16 *clk_sel_val)
3f542974 1720{
9c134a14 1721 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
3f542974
PS		 1722
1723 if (baudRate <= 115200) {
1724 *divisor = 115200 / baudRate;
1725 *clk_sel_val = 0x0;
1726 }
1727 if ((baudRate > 115200) && (baudRate <= 230400)) {
1728 *divisor = 230400 / baudRate;
1729 *clk_sel_val = 0x10;
1730 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1731 *divisor = 403200 / baudRate;
1732 *clk_sel_val = 0x20;
1733 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1734 *divisor = 460800 / baudRate;
1735 *clk_sel_val = 0x30;
1736 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1737 *divisor = 806400 / baudRate;
1738 *clk_sel_val = 0x40;
1739 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1740 *divisor = 921600 / baudRate;
1741 *clk_sel_val = 0x50;
1742 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1743 *divisor = 1572864 / baudRate;
1744 *clk_sel_val = 0x60;
1745 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1746 *divisor = 3145728 / baudRate;
1747 *clk_sel_val = 0x70;
1748 }
1749 return 0;
1750
1751#ifdef NOTMCS7840
1752
1753 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1754 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1755 *divisor = mos7840_divisor_table[i].Divisor;
1756 return 0;
1757 }
1758 }
1759
1760 /* After trying for all the standard baud rates *
1761 * Try calculating the divisor for this baud rate */
1762
1763 if (baudrate > 75 && baudrate < 230400) {
1764 /* get the divisor */
1765 custom = (__u16) (230400L / baudrate);
1766
1767 /* Check for round off */
1768 round1 = (__u16) (2304000L / baudrate);
1769 round = (__u16) (round1 - (custom * 10));
880af9db 1770 if (round > 4)
3f542974 1771 custom++;
3f542974
PS		 1772 *divisor = custom;
1773
9c134a14 1774 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
3f542974
PS		 1775 return 0;
1776 }
1777
9c134a14 1778 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
3f542974
PS		 1779 return -1;
1780#endif
1781}
1782
1783/*****************************************************************************
1784 * mos7840_send_cmd_write_baud_rate
1785 * this function sends the proper command to change the baud rate of the
1786 * specified port.
1787 *****************************************************************************/
1788
1789static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1790 int baudRate)
1791{
1792 int divisor = 0;
1793 int status;
1794 __u16 Data;
1795 unsigned char number;
1796 __u16 clk_sel_val;
1797 struct usb_serial_port *port;
1798
1799 if (mos7840_port == NULL)
1800 return -1;
1801
9c134a14
GKH		 1802 port = mos7840_port->port;
1803 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1804 return -1;
3f542974 1805
9c134a14 1806 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1807 return -1;
3f542974 1808
3f542974
PS		 1809 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1810
9c134a14
GKH		 1811 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__,
1812 mos7840_port->port->number, baudRate);
880af9db 1813 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1814 if (baudRate > 115200) {
1815#ifdef HW_flow_control
880af9db
AC		 1816 /* NOTE: need to see the pther register to modify */
1817 /* setting h/w flow control bit to 1 */
3f542974
PS		 1818 Data = 0x2b;
1819 mos7840_port->shadowMCR = Data;
880af9db
AC		 1820 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1821 Data);
3f542974 1822 if (status < 0) {
9c134a14 1823 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1824 return -1;
1825 }
1826#endif
1827
1828 } else {
1829#ifdef HW_flow_control
093ea2d3 1830 /* setting h/w flow control bit to 0 */
3f542974
PS		 1831 Data = 0xb;
1832 mos7840_port->shadowMCR = Data;
880af9db
AC		 1833 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1834 Data);
3f542974 1835 if (status < 0) {
9c134a14 1836 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1837 return -1;
1838 }
1839#endif
1840
1841 }
1842
880af9db 1843 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1844 clk_sel_val = 0x0;
1845 Data = 0x0;
9c134a14 1846 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
3f542974 1847 &clk_sel_val);
880af9db
AC		 1848 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1849 &Data);
3f542974 1850 if (status < 0) {
9c134a14 1851 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
3f542974
PS		 1852 return -1;
1853 }
1854 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1855 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1856 Data);
3f542974 1857 if (status < 0) {
9c134a14 1858 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1859 return -1;
1860 }
1861 /* Calculate the Divisor */
1862
1863 if (status) {
194343d9 1864 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1865 return status;
1866 }
1867 /* Enable access to divisor latch */
1868 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1869 mos7840_port->shadowLCR = Data;
1870 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1871
1872 /* Write the divisor */
1873 Data = (unsigned char)(divisor & 0xff);
9c134a14 1874 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
3f542974
PS		 1875 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1876
1877 Data = (unsigned char)((divisor & 0xff00) >> 8);
9c134a14 1878 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
3f542974
PS		 1879 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1880
1881 /* Disable access to divisor latch */
1882 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1883 mos7840_port->shadowLCR = Data;
1884 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1885
1886 }
3f542974
PS		 1887 return status;
1888}
1889
1890/*****************************************************************************
1891 * mos7840_change_port_settings
1892 * This routine is called to set the UART on the device to match
1893 * the specified new settings.
1894 *****************************************************************************/
1895
95da310e
AC		 1896static void mos7840_change_port_settings(struct tty_struct *tty,
1897 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1898{
3f542974
PS		 1899 int baud;
1900 unsigned cflag;
1901 unsigned iflag;
1902 __u8 lData;
1903 __u8 lParity;
1904 __u8 lStop;
1905 int status;
1906 __u16 Data;
1907 struct usb_serial_port *port;
1908 struct usb_serial *serial;
1909
1910 if (mos7840_port == NULL)
1911 return;
1912
9c134a14 1913 port = mos7840_port->port;
3f542974 1914
9c134a14 1915 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1916 return;
3f542974 1917
9c134a14 1918 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1919 return;
3f542974
PS		 1920
1921 serial = port->serial;
1922
3f542974 1923 if (!mos7840_port->open) {
9c134a14 1924 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1925 return;
1926 }
1927
3f542974
PS		 1928 lData = LCR_BITS_8;
1929 lStop = LCR_STOP_1;
1930 lParity = LCR_PAR_NONE;
1931
adc8d746
AC		 1932 cflag = tty->termios.c_cflag;
1933 iflag = tty->termios.c_iflag;
3f542974
PS		 1934
1935 /* Change the number of bits */
1936 if (cflag & CSIZE) {
1937 switch (cflag & CSIZE) {
1938 case CS5:
1939 lData = LCR_BITS_5;
1940 break;
1941
1942 case CS6:
1943 lData = LCR_BITS_6;
1944 break;
1945
1946 case CS7:
1947 lData = LCR_BITS_7;
1948 break;
1949 default:
1950 case CS8:
1951 lData = LCR_BITS_8;
1952 break;
1953 }
1954 }
1955 /* Change the Parity bit */
1956 if (cflag & PARENB) {
1957 if (cflag & PARODD) {
1958 lParity = LCR_PAR_ODD;
9c134a14 1959 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
3f542974
PS		 1960 } else {
1961 lParity = LCR_PAR_EVEN;
9c134a14 1962 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
3f542974
PS		 1963 }
1964
1965 } else {
9c134a14 1966 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
3f542974
PS		 1967 }
1968
880af9db 1969 if (cflag & CMSPAR)
3f542974 1970 lParity = lParity | 0x20;
3f542974
PS		 1971
1972 /* Change the Stop bit */
1973 if (cflag & CSTOPB) {
1974 lStop = LCR_STOP_2;
9c134a14 1975 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
3f542974
PS		 1976 } else {
1977 lStop = LCR_STOP_1;
9c134a14 1978 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
3f542974
PS		 1979 }
1980
1981 /* Update the LCR with the correct value */
1982 mos7840_port->shadowLCR &=
1983 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1984 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1985
9c134a14
GKH		 1986 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1987 mos7840_port->shadowLCR);
3f542974
PS		 1988 /* Disable Interrupts */
1989 Data = 0x00;
1990 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1991
1992 Data = 0x00;
1993 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1994
1995 Data = 0xcf;
1996 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1997
1998 /* Send the updated LCR value to the mos7840 */
1999 Data = mos7840_port->shadowLCR;
2000
2001 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2002
2003 Data = 0x00b;
2004 mos7840_port->shadowMCR = Data;
2005 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2006 Data = 0x00b;
2007 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2008
2009 /* set up the MCR register and send it to the mos7840 */
2010
2011 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 2012 if (cflag & CBAUD)
3f542974 2013 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 2014
880af9db 2015 if (cflag & CRTSCTS)
3f542974 2016 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 2017 else
3f542974 2018 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 2019
2020 Data = mos7840_port->shadowMCR;
2021 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2022
2023 /* Determine divisor based on baud rate */
2024 baud = tty_get_baud_rate(tty);
2025
2026 if (!baud) {
2027 /* pick a default, any default... */
9c134a14 2028 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
3f542974
PS		 2029 baud = 9600;
2030 }
2031
9c134a14 2032 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
3f542974
PS		 2033 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2034
2035 /* Enable Interrupts */
2036 Data = 0x0c;
2037 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2038
50de36f7 2039 if (mos7840_port->read_urb_busy == false) {
50de36f7 2040 mos7840_port->read_urb_busy = true;
3f542974 2041 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
3f542974 2042 if (status) {
9c134a14 2043 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 2044 status);
50de36f7 2045 mos7840_port->read_urb_busy = false;
3f542974
PS		 2046 }
2047 }
2048 wake_up(&mos7840_port->delta_msr_wait);
2049 mos7840_port->delta_msr_cond = 1;
9c134a14
GKH		 2050 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
2051 mos7840_port->shadowLCR);
3f542974
PS		 2052}
2053
2054/*****************************************************************************
2055 * mos7840_set_termios
2056 * this function is called by the tty driver when it wants to change
2057 * the termios structure
2058 *****************************************************************************/
2059
95da310e
AC		 2060static void mos7840_set_termios(struct tty_struct *tty,
2061 struct usb_serial_port *port,
606d099c 2062 struct ktermios *old_termios)
3f542974
PS		 2063{
2064 int status;
2065 unsigned int cflag;
2066 struct usb_serial *serial;
2067 struct moschip_port *mos7840_port;
3363155b 2068
9c134a14 2069 if (mos7840_port_paranoia_check(port, __func__))
3f542974 2070 return;
3f542974
PS		 2071
2072 serial = port->serial;
2073
9c134a14 2074 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 2075 return;
3f542974
PS		 2076
2077 mos7840_port = mos7840_get_port_private(port);
2078
2079 if (mos7840_port == NULL)
2080 return;
2081
3f542974 2082 if (!mos7840_port->open) {
9c134a14 2083 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 2084 return;
2085 }
2086
9c134a14 2087 dev_dbg(&port->dev, "%s", "setting termios - \n");
3f542974 2088
adc8d746 2089 cflag = tty->termios.c_cflag;
3f542974 2090
9c134a14 2091 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
d9a80746 2092 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
9c134a14
GKH		 2093 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2094 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2095 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
3f542974
PS		 2096
2097 /* change the port settings to the new ones specified */
2098
95da310e 2099 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2100
2101 if (!mos7840_port->read_urb) {
9c134a14 2102 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
3f542974
PS		 2103 return;
2104 }
2105
50de36f7 2106 if (mos7840_port->read_urb_busy == false) {
50de36f7 2107 mos7840_port->read_urb_busy = true;
3f542974
PS		 2108 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2109 if (status) {
9c134a14 2110 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 2111 status);
50de36f7 2112 mos7840_port->read_urb_busy = false;
3f542974
PS		 2113 }
2114 }
3f542974
PS		 2115}
2116
2117/*****************************************************************************
2118 * mos7840_get_lsr_info - get line status register info
2119 *
2120 * Purpose: Let user call ioctl() to get info when the UART physically
2121 * is emptied. On bus types like RS485, the transmitter must
2122 * release the bus after transmitting. This must be done when
2123 * the transmit shift register is empty, not be done when the
2124 * transmit holding register is empty. This functionality
2125 * allows an RS485 driver to be written in user space.
2126 *****************************************************************************/
2127
95da310e 2128static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2129 unsigned int __user *value)
3f542974
PS		 2130{
2131 int count;
2132 unsigned int result = 0;
2133
95da310e 2134 count = mos7840_chars_in_buffer(tty);
9c134a14 2135 if (count == 0)
3f542974 2136 result = TIOCSER_TEMT;
3f542974
PS		 2137
2138 if (copy_to_user(value, &result, sizeof(int)))
2139 return -EFAULT;
2140 return 0;
2141}
2142
3f542974
PS		 2143/*****************************************************************************
2144 * mos7840_get_serial_info
2145 * function to get information about serial port
2146 *****************************************************************************/
2147
2148static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2149 struct serial_struct __user *retinfo)
3f542974
PS		 2150{
2151 struct serial_struct tmp;
2152
2153 if (mos7840_port == NULL)
2154 return -1;
2155
2156 if (!retinfo)
2157 return -EFAULT;
2158
2159 memset(&tmp, 0, sizeof(tmp));
2160
2161 tmp.type = PORT_16550A;
2162 tmp.line = mos7840_port->port->serial->minor;
2163 tmp.port = mos7840_port->port->number;
2164 tmp.irq = 0;
2165 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2166 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2167 tmp.baud_base = 9600;
2168 tmp.close_delay = 5 * HZ;
2169 tmp.closing_wait = 30 * HZ;
2170
2171 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2172 return -EFAULT;
2173 return 0;
2174}
2175
0bca1b91
AC		 2176static int mos7840_get_icount(struct tty_struct *tty,
2177 struct serial_icounter_struct *icount)
2178{
2179 struct usb_serial_port *port = tty->driver_data;
2180 struct moschip_port *mos7840_port;
2181 struct async_icount cnow;
2182
2183 mos7840_port = mos7840_get_port_private(port);
2184 cnow = mos7840_port->icount;
2185
2186 smp_rmb();
2187 icount->cts = cnow.cts;
2188 icount->dsr = cnow.dsr;
2189 icount->rng = cnow.rng;
2190 icount->dcd = cnow.dcd;
2191 icount->rx = cnow.rx;
2192 icount->tx = cnow.tx;
2193 icount->frame = cnow.frame;
2194 icount->overrun = cnow.overrun;
2195 icount->parity = cnow.parity;
2196 icount->brk = cnow.brk;
2197 icount->buf_overrun = cnow.buf_overrun;
2198
9c134a14
GKH		 2199 dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__,
2200 icount->rx, icount->tx);
0bca1b91
AC		 2201 return 0;
2202}
2203
3f542974
PS		 2204/*****************************************************************************
2205 * SerialIoctl
2206 * this function handles any ioctl calls to the driver
2207 *****************************************************************************/
2208
00a0d0d6 2209static int mos7840_ioctl(struct tty_struct *tty,
3f542974
PS		 2210 unsigned int cmd, unsigned long arg)
2211{
95da310e 2212 struct usb_serial_port *port = tty->driver_data;
97c4965d 2213 void __user *argp = (void __user *)arg;
3f542974 2214 struct moschip_port *mos7840_port;
3f542974
PS		 2215
2216 struct async_icount cnow;
2217 struct async_icount cprev;
3f542974 2218
9c134a14 2219 if (mos7840_port_paranoia_check(port, __func__))
3f542974 2220 return -1;
3f542974
PS		 2221
2222 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2223
2224 if (mos7840_port == NULL)
2225 return -1;
2226
9c134a14 2227 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
3f542974
PS		 2228
2229 switch (cmd) {
2230 /* return number of bytes available */
2231
3f542974 2232 case TIOCSERGETLSR:
9c134a14 2233 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
95da310e 2234 return mos7840_get_lsr_info(tty, argp);
3f542974 2235
3f542974 2236 case TIOCGSERIAL:
9c134a14 2237 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
97c4965d 2238 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2239
2240 case TIOCSSERIAL:
9c134a14 2241 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
3f542974
PS		 2242 break;
2243
2244 case TIOCMIWAIT:
9c134a14 2245 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__);
3f542974
PS		 2246 cprev = mos7840_port->icount;
2247 while (1) {
880af9db 2248 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974
PS		 2249 mos7840_port->delta_msr_cond = 0;
2250 wait_event_interruptible(mos7840_port->delta_msr_wait,
2251 (mos7840_port->
2252 delta_msr_cond == 1));
2253
2254 /* see if a signal did it */
2255 if (signal_pending(current))
2256 return -ERESTARTSYS;
2257 cnow = mos7840_port->icount;
0de9a702 2258 smp_rmb();
3f542974
PS		 2259 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2260 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2261 return -EIO; /* no change => error */
2262 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2263 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2264 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2265 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2266 return 0;
2267 }
2268 cprev = cnow;
2269 }
2270 /* NOTREACHED */
2271 break;
2272
3f542974
PS		 2273 default:
2274 break;
2275 }
3f542974
PS		 2276 return -ENOIOCTLCMD;
2277}
2278
0eafe4de
D		 2279static int mos7810_check(struct usb_serial *serial)
2280{
2281 int i, pass_count = 0;
2282 __u16 data = 0, mcr_data = 0;
2283 __u16 test_pattern = 0x55AA;
2284
2285 /* Store MCR setting */
2286 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2287 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2288 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2289
2290 for (i = 0; i < 16; i++) {
2291 /* Send the 1-bit test pattern out to MCS7810 test pin */
2292 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2293 MCS_WRREQ, MCS_WR_RTYPE,
2294 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2295 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2296
2297 /* Read the test pattern back */
2298 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2299 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2300 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2301
2302 /* If this is a MCS7810 device, both test patterns must match */
2303 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2304 break;
2305
2306 pass_count++;
2307 }
2308
2309 /* Restore MCR setting */
2310 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2311 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2312 0, MOS_WDR_TIMEOUT);
2313
2314 if (pass_count == 16)
2315 return 1;
2316
2317 return 0;
2318}
2319
3f542974
PS		 2320static int mos7840_calc_num_ports(struct usb_serial *serial)
2321{
0eafe4de 2322 __u16 data = 0x00;
093ea2d3
DL		 2323 int mos7840_num_ports;
2324
0eafe4de
D		 2325 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2326 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
093ea2d3
DL		 2327 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2328
0eafe4de
D		 2329 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||
2330 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {
2331 device_type = serial->dev->descriptor.idProduct;
093ea2d3 2332 } else {
0eafe4de
D		 2333 /* For a MCS7840 device GPIO0 must be set to 1 */
2334 if ((data & 0x01) == 1)
2335 device_type = MOSCHIP_DEVICE_ID_7840;
2336 else if (mos7810_check(serial))
2337 device_type = MOSCHIP_DEVICE_ID_7810;
2338 else
2339 device_type = MOSCHIP_DEVICE_ID_7820;
3f542974 2340 }
093ea2d3 2341
0eafe4de
D		 2342 mos7840_num_ports = (device_type >> 4) & 0x000F;
2343 serial->num_bulk_in = mos7840_num_ports;
2344 serial->num_bulk_out = mos7840_num_ports;
2345 serial->num_ports = mos7840_num_ports;
2346
3f542974
PS		 2347 return mos7840_num_ports;
2348}
2349
2350/****************************************************************************
2351 * mos7840_startup
2352 ****************************************************************************/
2353
2354static int mos7840_startup(struct usb_serial *serial)
2355{
2356 struct moschip_port *mos7840_port;
2357 struct usb_device *dev;
2358 int i, status;
3f542974 2359 __u16 Data;
3f542974 2360
3f542974
PS		 2361 dev = serial->dev;
2362
3f542974
PS		 2363 /* we set up the pointers to the endpoints in the mos7840_open *
2364 * function, as the structures aren't created yet. */
2365
2366 /* set up port private structures */
2367 for (i = 0; i < serial->num_ports; ++i) {
9c134a14 2368 dev_dbg(&dev->dev, "mos7840_startup: configuring port %d............\n", i);
7ac9da10 2369 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
3f542974 2370 if (mos7840_port == NULL) {
194343d9 2371 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
0de9a702
ON		 2372 status = -ENOMEM;
2373 i--; /* don't follow NULL pointer cleaning up */
2374 goto error;
3f542974 2375 }
3f542974 2376
880af9db
AC		 2377 /* Initialize all port interrupt end point to port 0 int
2378 * endpoint. Our device has only one interrupt end point
2379 * common to all port */
3f542974
PS		 2380
2381 mos7840_port->port = serial->port[i];
2382 mos7840_set_port_private(serial->port[i], mos7840_port);
0de9a702 2383 spin_lock_init(&mos7840_port->pool_lock);
3f542974 2384
37768adf
TC		 2385 /* minor is not initialised until later by
2386 * usb-serial.c:get_free_serial() and cannot therefore be used
2387 * to index device instances */
2388 mos7840_port->port_num = i + 1;
9c134a14
GKH		 2389 dev_dbg(&dev->dev, "serial->port[i]->number = %d\n", serial->port[i]->number);
2390 dev_dbg(&dev->dev, "serial->port[i]->serial->minor = %d\n", serial->port[i]->serial->minor);
2391 dev_dbg(&dev->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2392 dev_dbg(&dev->dev, "serial->minor = %d\n", serial->minor);
3f542974
PS		 2393
2394 if (mos7840_port->port_num == 1) {
2395 mos7840_port->SpRegOffset = 0x0;
2396 mos7840_port->ControlRegOffset = 0x1;
2397 mos7840_port->DcrRegOffset = 0x4;
2398 } else if ((mos7840_port->port_num == 2)
0de9a702 2399 && (serial->num_ports == 4)) {
3f542974
PS		 2400 mos7840_port->SpRegOffset = 0x8;
2401 mos7840_port->ControlRegOffset = 0x9;
2402 mos7840_port->DcrRegOffset = 0x16;
2403 } else if ((mos7840_port->port_num == 2)
0de9a702 2404 && (serial->num_ports == 2)) {
3f542974
PS		 2405 mos7840_port->SpRegOffset = 0xa;
2406 mos7840_port->ControlRegOffset = 0xb;
2407 mos7840_port->DcrRegOffset = 0x19;
2408 } else if ((mos7840_port->port_num == 3)
0de9a702 2409 && (serial->num_ports == 4)) {
3f542974
PS		 2410 mos7840_port->SpRegOffset = 0xa;
2411 mos7840_port->ControlRegOffset = 0xb;
2412 mos7840_port->DcrRegOffset = 0x19;
2413 } else if ((mos7840_port->port_num == 4)
0de9a702 2414 && (serial->num_ports == 4)) {
3f542974
PS		 2415 mos7840_port->SpRegOffset = 0xc;
2416 mos7840_port->ControlRegOffset = 0xd;
2417 mos7840_port->DcrRegOffset = 0x1c;
2418 }
9c134a14 2419 mos7840_dump_serial_port(serial->port[i], mos7840_port);
3f542974
PS		 2420 mos7840_set_port_private(serial->port[i], mos7840_port);
2421
880af9db
AC		 2422 /* enable rx_disable bit in control register */
2423 status = mos7840_get_reg_sync(serial->port[i],
2424 mos7840_port->ControlRegOffset, &Data);
3f542974 2425 if (status < 0) {
9c134a14 2426 dev_dbg(&dev->dev, "Reading ControlReg failed status-0x%x\n", status);
3f542974
PS		 2427 break;
2428 } else
9c134a14 2429 dev_dbg(&dev->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
880af9db
AC		 2430 Data |= 0x08; /* setting driver done bit */
2431 Data |= 0x04; /* sp1_bit to have cts change reflect in
2432 modem status reg */
3f542974 2433
880af9db
AC		 2434 /* Data |= 0x20; //rx_disable bit */
2435 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2436 mos7840_port->ControlRegOffset, Data);
2437 if (status < 0) {
9c134a14 2438 dev_dbg(&dev->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
3f542974
PS		 2439 break;
2440 } else
9c134a14 2441 dev_dbg(&dev->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
3f542974 2442
880af9db
AC		 2443 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2444 and 0x24 in DCR3 */
3f542974 2445 Data = 0x01;
880af9db
AC		 2446 status = mos7840_set_reg_sync(serial->port[i],
2447 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
3f542974 2448 if (status < 0) {
9c134a14 2449 dev_dbg(&dev->dev, "Writing DCR0 failed status-0x%x\n", status);
3f542974
PS		 2450 break;
2451 } else
9c134a14 2452 dev_dbg(&dev->dev, "DCR0 Writing success status%d\n", status);
3f542974
PS		 2453
2454 Data = 0x05;
880af9db
AC		 2455 status = mos7840_set_reg_sync(serial->port[i],
2456 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
3f542974 2457 if (status < 0) {
9c134a14 2458 dev_dbg(&dev->dev, "Writing DCR1 failed status-0x%x\n", status);
3f542974
PS		 2459 break;
2460 } else
9c134a14 2461 dev_dbg(&dev->dev, "DCR1 Writing success status%d\n", status);
3f542974
PS		 2462
2463 Data = 0x24;
880af9db
AC		 2464 status = mos7840_set_reg_sync(serial->port[i],
2465 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
3f542974 2466 if (status < 0) {
9c134a14 2467 dev_dbg(&dev->dev, "Writing DCR2 failed status-0x%x\n", status);
3f542974
PS		 2468 break;
2469 } else
9c134a14 2470 dev_dbg(&dev->dev, "DCR2 Writing success status%d\n", status);
3f542974 2471
880af9db 2472 /* write values in clkstart0x0 and clkmulti 0x20 */
3f542974 2473 Data = 0x0;
880af9db 2474 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2475 CLK_START_VALUE_REGISTER, Data);
2476 if (status < 0) {
9c134a14 2477 dev_dbg(&dev->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
3f542974
PS		 2478 break;
2479 } else
9c134a14 2480 dev_dbg(&dev->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
3f542974
PS		 2481
2482 Data = 0x20;
880af9db
AC		 2483 status = mos7840_set_reg_sync(serial->port[i],
2484 CLK_MULTI_REGISTER, Data);
3f542974 2485 if (status < 0) {
9c134a14 2486 dev_dbg(&dev->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
0de9a702 2487 goto error;
3f542974 2488 } else
9c134a14 2489 dev_dbg(&dev->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
3f542974 2490
880af9db 2491 /* write value 0x0 to scratchpad register */
3f542974 2492 Data = 0x00;
880af9db
AC		 2493 status = mos7840_set_uart_reg(serial->port[i],
2494 SCRATCH_PAD_REGISTER, Data);
3f542974 2495 if (status < 0) {
9c134a14 2496 dev_dbg(&dev->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
3f542974
PS		 2497 break;
2498 } else
9c134a14 2499 dev_dbg(&dev->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
3f542974 2500
880af9db 2501 /* Zero Length flag register */
3f542974 2502 if ((mos7840_port->port_num != 1)
0de9a702 2503 && (serial->num_ports == 2)) {
3f542974
PS		 2504
2505 Data = 0xff;
3f542974 2506 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2507 (__u16) (ZLP_REG1 +
2508 ((__u16)mos7840_port->port_num)), Data);
9c134a14
GKH		 2509 dev_dbg(&dev->dev, "ZLIP offset %x\n",
2510 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
3f542974 2511 if (status < 0) {
9c134a14 2512 dev_dbg(&dev->dev, "Writing ZLP_REG%d failed status-0x%x\n", i + 2, status);
3f542974
PS		 2513 break;
2514 } else
9c134a14 2515 dev_dbg(&dev->dev, "ZLP_REG%d Writing success status%d\n", i + 2, status);
3f542974
PS		 2516 } else {
2517 Data = 0xff;
3f542974 2518 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2519 (__u16) (ZLP_REG1 +
2520 ((__u16)mos7840_port->port_num) - 0x1), Data);
9c134a14
GKH		 2521 dev_dbg(&dev->dev, "ZLIP offset %x\n",
2522 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
3f542974 2523 if (status < 0) {
9c134a14 2524 dev_dbg(&dev->dev, "Writing ZLP_REG%d failed status-0x%x\n", i + 1, status);
3f542974
PS		 2525 break;
2526 } else
9c134a14 2527 dev_dbg(&dev->dev, "ZLP_REG%d Writing success status%d\n", i + 1, status);
3f542974
PS		 2528
2529 }
0de9a702 2530 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974 2531 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
880af9db
AC		 2532 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2533 GFP_KERNEL);
2534 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2535 !mos7840_port->dr) {
0de9a702
ON		 2536 status = -ENOMEM;
2537 goto error;
2538 }
0eafe4de
D		 2539
2540 mos7840_port->has_led = false;
2541
2542 /* Initialize LED timers */
2543 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2544 mos7840_port->has_led = true;
2545
2546 init_timer(&mos7840_port->led_timer1);
2547 mos7840_port->led_timer1.function = mos7840_led_off;
2548 mos7840_port->led_timer1.expires =
2549 jiffies + msecs_to_jiffies(LED_ON_MS);
2550 mos7840_port->led_timer1.data =
2551 (unsigned long)mos7840_port;
2552
2553 init_timer(&mos7840_port->led_timer2);
2554 mos7840_port->led_timer2.function =
2555 mos7840_led_flag_off;
2556 mos7840_port->led_timer2.expires =
2557 jiffies + msecs_to_jiffies(LED_OFF_MS);
2558 mos7840_port->led_timer2.data =
2559 (unsigned long)mos7840_port;
2560
2561 mos7840_port->led_flag = false;
2562
2563 /* Turn off LED */
2564 mos7840_set_led_sync(serial->port[i],
2565 MODEM_CONTROL_REGISTER, 0x0300);
2566 }
3f542974
PS		 2567 }
2568
880af9db 2569 /* Zero Length flag enable */
3f542974 2570 Data = 0x0f;
3f542974
PS		 2571 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2572 if (status < 0) {
9c134a14 2573 dev_dbg(&dev->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
7ced46c3 2574 goto error;
3f542974 2575 } else
9c134a14 2576 dev_dbg(&dev->dev, "ZLP_REG5 Writing success status%d\n", status);
3f542974
PS		 2577
2578 /* setting configuration feature to one */
2579 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1e658489 2580 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, MOS_WDR_TIMEOUT);
3f542974 2581 return 0;
0de9a702
ON		 2582error:
2583 for (/* nothing */; i >= 0; i--) {
2584 mos7840_port = mos7840_get_port_private(serial->port[i]);
2585
2586 kfree(mos7840_port->dr);
2587 kfree(mos7840_port->ctrl_buf);
2588 usb_free_urb(mos7840_port->control_urb);
2589 kfree(mos7840_port);
2590 serial->port[i] = NULL;
2591 }
2592 return status;
3f542974
PS		 2593}
2594
2595/****************************************************************************
f9c99bb8 2596 * mos7840_disconnect
3f542974
PS		 2597 * This function is called whenever the device is removed from the usb bus.
2598 ****************************************************************************/
2599
f9c99bb8 2600static void mos7840_disconnect(struct usb_serial *serial)
3f542974
PS		 2601{
2602 int i;
0de9a702 2603 unsigned long flags;
3f542974 2604 struct moschip_port *mos7840_port;
3f542974 2605
880af9db 2606 /* check for the ports to be closed,close the ports and disconnect */
3f542974
PS		 2607
2608 /* free private structure allocated for serial port *
2609 * stop reads and writes on all ports */
2610
2611 for (i = 0; i < serial->num_ports; ++i) {
2612 mos7840_port = mos7840_get_port_private(serial->port[i]);
37768adf
TC		 2613 if (mos7840_port) {
2614 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2615 mos7840_port->zombie = 1;
2616 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
2617 usb_kill_urb(mos7840_port->control_urb);
f9c99bb8
AS		 2618 }
2619 }
f9c99bb8
AS		 2620}
2621
2622/****************************************************************************
2623 * mos7840_release
2624 * This function is called when the usb_serial structure is freed.
2625 ****************************************************************************/
2626
2627static void mos7840_release(struct usb_serial *serial)
2628{
2629 int i;
2630 struct moschip_port *mos7840_port;
f9c99bb8 2631
f9c99bb8
AS		 2632 /* check for the ports to be closed,close the ports and disconnect */
2633
2634 /* free private structure allocated for serial port *
2635 * stop reads and writes on all ports */
2636
2637 for (i = 0; i < serial->num_ports; ++i) {
2638 mos7840_port = mos7840_get_port_private(serial->port[i]);
f9c99bb8 2639 if (mos7840_port) {
0eafe4de
D		 2640 if (mos7840_port->has_led) {
2641 /* Turn off LED */
2642 mos7840_set_led_sync(mos7840_port->port,
2643 MODEM_CONTROL_REGISTER, 0x0300);
2644
2645 del_timer_sync(&mos7840_port->led_timer1);
2646 del_timer_sync(&mos7840_port->led_timer2);
2647 }
37768adf
TC		 2648 kfree(mos7840_port->ctrl_buf);
2649 kfree(mos7840_port->dr);
2650 kfree(mos7840_port);
2651 }
3f542974 2652 }
3f542974
PS		 2653}
2654
2655static struct usb_serial_driver moschip7840_4port_device = {
2656 .driver = {
2657 .owner = THIS_MODULE,
2658 .name = "mos7840",
2659 },
2660 .description = DRIVER_DESC,
68e24113 2661 .id_table = id_table,
3f542974 2662 .num_ports = 4,
3f542974
PS		 2663 .open = mos7840_open,
2664 .close = mos7840_close,
2665 .write = mos7840_write,
2666 .write_room = mos7840_write_room,
2667 .chars_in_buffer = mos7840_chars_in_buffer,
2668 .throttle = mos7840_throttle,
2669 .unthrottle = mos7840_unthrottle,
2670 .calc_num_ports = mos7840_calc_num_ports,
2671#ifdef MCSSerialProbe
2672 .probe = mos7840_serial_probe,
2673#endif
2674 .ioctl = mos7840_ioctl,
2675 .set_termios = mos7840_set_termios,
2676 .break_ctl = mos7840_break,
2677 .tiocmget = mos7840_tiocmget,
2678 .tiocmset = mos7840_tiocmset,
0bca1b91 2679 .get_icount = mos7840_get_icount,
3f542974 2680 .attach = mos7840_startup,
f9c99bb8
AS		 2681 .disconnect = mos7840_disconnect,
2682 .release = mos7840_release,
3f542974
PS		 2683 .read_bulk_callback = mos7840_bulk_in_callback,
2684 .read_int_callback = mos7840_interrupt_callback,
2685};
2686
4d2a7aff
AS		 2687static struct usb_serial_driver * const serial_drivers[] = {
2688 &moschip7840_4port_device, NULL
2689};
2690
68e24113 2691module_usb_serial_driver(serial_drivers, id_table);
3f542974 2692
3f542974
PS		 2693MODULE_DESCRIPTION(DRIVER_DESC);
2694MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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