projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
USB: mos7840: remove invalid disconnect handling
[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 */
221 __u8 shadowLCR; /* last LCR value received */
222 __u8 shadowMCR; /* last MCR value received */
223 char open;
0de9a702 224 char open_ports;
3f542974
PS		 225 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
226 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
227 int delta_msr_cond;
228 struct async_icount icount;
229 struct usb_serial_port *port; /* loop back to the owner of this object */
230
880af9db 231 /* Offsets */
3f542974
PS		 232 __u8 SpRegOffset;
233 __u8 ControlRegOffset;
234 __u8 DcrRegOffset;
880af9db 235 /* for processing control URBS in interrupt context */
3f542974 236 struct urb *control_urb;
0de9a702 237 struct usb_ctrlrequest *dr;
3f542974
PS		 238 char *ctrl_buf;
239 int MsrLsr;
240
0de9a702 241 spinlock_t pool_lock;
3f542974 242 struct urb *write_urb_pool[NUM_URBS];
0de9a702 243 char busy[NUM_URBS];
50de36f7 244 bool read_urb_busy;
3f542974 245
0eafe4de
D		 246 /* For device(s) with LED indicator */
247 bool has_led;
248 bool led_flag;
249 struct timer_list led_timer1; /* Timer for LED on */
250 struct timer_list led_timer2; /* Timer for LED off */
251};
3f542974 252
3f542974
PS		 253/*
254 * mos7840_set_reg_sync
255 * To set the Control register by calling usb_fill_control_urb function
256 * by passing usb_sndctrlpipe function as parameter.
257 */
258
259static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
260 __u16 val)
261{
262 struct usb_device *dev = port->serial->dev;
263 val = val & 0x00ff;
9c134a14 264 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
3f542974
PS		 265
266 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
267 MCS_WR_RTYPE, val, reg, NULL, 0,
268 MOS_WDR_TIMEOUT);
269}
270
271/*
272 * mos7840_get_reg_sync
273 * To set the Uart register by calling usb_fill_control_urb function by
274 * passing usb_rcvctrlpipe function as parameter.
275 */
276
277static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
880af9db 278 __u16 *val)
3f542974
PS		 279{
280 struct usb_device *dev = port->serial->dev;
281 int ret = 0;
9e221a35
JH		 282 u8 *buf;
283
284 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
285 if (!buf)
286 return -ENOMEM;
3f542974
PS		 287
288 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 289 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
3f542974 290 MOS_WDR_TIMEOUT);
9e221a35 291 *val = buf[0];
9c134a14 292 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
9e221a35
JH		 293
294 kfree(buf);
3f542974
PS		 295 return ret;
296}
297
298/*
299 * mos7840_set_uart_reg
300 * To set the Uart register by calling usb_fill_control_urb function by
301 * passing usb_sndctrlpipe function as parameter.
302 */
303
304static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
305 __u16 val)
306{
307
308 struct usb_device *dev = port->serial->dev;
309 val = val & 0x00ff;
880af9db
AC		 310 /* For the UART control registers, the application number need
311 to be Or'ed */
0de9a702 312 if (port->serial->num_ports == 4) {
880af9db
AC		 313 val |= (((__u16) port->number -
314 (__u16) (port->serial->minor)) + 1) << 8;
3f542974
PS		 315 } else {
316 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 317 val |= (((__u16) port->number -
3f542974 318 (__u16) (port->serial->minor)) + 1) << 8;
3f542974 319 } else {
9c134a14 320 val |= (((__u16) port->number -
3f542974 321 (__u16) (port->serial->minor)) + 2) << 8;
3f542974
PS		 322 }
323 }
9c134a14 324 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
3f542974
PS		 325 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
326 MCS_WR_RTYPE, val, reg, NULL, 0,
327 MOS_WDR_TIMEOUT);
328
329}
330
331/*
332 * mos7840_get_uart_reg
333 * To set the Control register by calling usb_fill_control_urb function
334 * by passing usb_rcvctrlpipe function as parameter.
335 */
336static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
880af9db 337 __u16 *val)
3f542974
PS		 338{
339 struct usb_device *dev = port->serial->dev;
340 int ret = 0;
341 __u16 Wval;
9e221a35
JH		 342 u8 *buf;
343
344 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
345 if (!buf)
346 return -ENOMEM;
3f542974 347
880af9db 348 /* Wval is same as application number */
0de9a702 349 if (port->serial->num_ports == 4) {
3f542974
PS		 350 Wval =
351 (((__u16) port->number - (__u16) (port->serial->minor)) +
352 1) << 8;
3f542974
PS		 353 } else {
354 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 355 Wval = (((__u16) port->number -
3f542974 356 (__u16) (port->serial->minor)) + 1) << 8;
3f542974 357 } else {
880af9db 358 Wval = (((__u16) port->number -
3f542974 359 (__u16) (port->serial->minor)) + 2) << 8;
3f542974
PS		 360 }
361 }
9c134a14 362 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
3f542974 363 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 364 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
3f542974 365 MOS_WDR_TIMEOUT);
9e221a35
JH		 366 *val = buf[0];
367
368 kfree(buf);
3f542974
PS		 369 return ret;
370}
371
9c134a14
GKH		 372static void mos7840_dump_serial_port(struct usb_serial_port *port,
373 struct moschip_port *mos7840_port)
3f542974
PS		 374{
375
9c134a14
GKH		 376 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
377 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
378 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
3f542974
PS		 379
380}
381
382/************************************************************************/
383/************************************************************************/
384/* I N T E R F A C E F U N C T I O N S */
385/* I N T E R F A C E F U N C T I O N S */
386/************************************************************************/
387/************************************************************************/
388
389static inline void mos7840_set_port_private(struct usb_serial_port *port,
390 struct moschip_port *data)
391{
392 usb_set_serial_port_data(port, (void *)data);
393}
394
395static inline struct moschip_port *mos7840_get_port_private(struct
396 usb_serial_port
397 *port)
398{
399 return (struct moschip_port *)usb_get_serial_port_data(port);
400}
401
0de9a702 402static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
3f542974
PS		 403{
404 struct moschip_port *mos7840_port;
405 struct async_icount *icount;
406 mos7840_port = port;
407 icount = &mos7840_port->icount;
408 if (new_msr &
409 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
410 MOS_MSR_DELTA_CD)) {
411 icount = &mos7840_port->icount;
412
413 /* update input line counters */
414 if (new_msr & MOS_MSR_DELTA_CTS) {
415 icount->cts++;
0de9a702 416 smp_wmb();
3f542974
PS		 417 }
418 if (new_msr & MOS_MSR_DELTA_DSR) {
419 icount->dsr++;
0de9a702 420 smp_wmb();
3f542974
PS		 421 }
422 if (new_msr & MOS_MSR_DELTA_CD) {
423 icount->dcd++;
0de9a702 424 smp_wmb();
3f542974
PS		 425 }
426 if (new_msr & MOS_MSR_DELTA_RI) {
427 icount->rng++;
0de9a702 428 smp_wmb();
3f542974
PS		 429 }
430 }
3f542974
PS		 431}
432
0de9a702 433static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
3f542974
PS		 434{
435 struct async_icount *icount;
436
3f542974 437 if (new_lsr & SERIAL_LSR_BI) {
880af9db
AC		 438 /*
439 * Parity and Framing errors only count if they
440 * occur exclusive of a break being
441 * received.
442 */
3f542974
PS		 443 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
444 }
445
446 /* update input line counters */
447 icount = &port->icount;
448 if (new_lsr & SERIAL_LSR_BI) {
449 icount->brk++;
0de9a702 450 smp_wmb();
3f542974
PS		 451 }
452 if (new_lsr & SERIAL_LSR_OE) {
453 icount->overrun++;
0de9a702 454 smp_wmb();
3f542974
PS		 455 }
456 if (new_lsr & SERIAL_LSR_PE) {
457 icount->parity++;
0de9a702 458 smp_wmb();
3f542974
PS		 459 }
460 if (new_lsr & SERIAL_LSR_FE) {
461 icount->frame++;
0de9a702 462 smp_wmb();
3f542974 463 }
3f542974
PS		 464}
465
466/************************************************************************/
467/************************************************************************/
468/* U S B C A L L B A C K F U N C T I O N S */
469/* U S B C A L L B A C K F U N C T I O N S */
470/************************************************************************/
471/************************************************************************/
472
7d12e780 473static void mos7840_control_callback(struct urb *urb)
3f542974
PS		 474{
475 unsigned char *data;
476 struct moschip_port *mos7840_port;
9c134a14 477 struct device *dev = &urb->dev->dev;
3f542974 478 __u8 regval = 0x0;
0643c724 479 int status = urb->status;
3f542974 480
cdc97792 481 mos7840_port = urb->context;
0de9a702 482
0643c724 483 switch (status) {
3f542974
PS		 484 case 0:
485 /* success */
486 break;
487 case -ECONNRESET:
488 case -ENOENT:
489 case -ESHUTDOWN:
490 /* this urb is terminated, clean up */
9c134a14 491 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
3f542974
PS		 492 return;
493 default:
9c134a14 494 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
28c3ae9a 495 return;
3f542974
PS		 496 }
497
9c134a14
GKH		 498 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
499 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
500 mos7840_port->MsrLsr, mos7840_port->port_num);
3f542974
PS		 501 data = urb->transfer_buffer;
502 regval = (__u8) data[0];
9c134a14 503 dev_dbg(dev, "%s data is %x\n", __func__, regval);
3f542974
PS		 504 if (mos7840_port->MsrLsr == 0)
505 mos7840_handle_new_msr(mos7840_port, regval);
506 else if (mos7840_port->MsrLsr == 1)
507 mos7840_handle_new_lsr(mos7840_port, regval);
3f542974
PS		 508}
509
510static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
880af9db 511 __u16 *val)
3f542974
PS		 512{
513 struct usb_device *dev = mcs->port->serial->dev;
0de9a702
ON		 514 struct usb_ctrlrequest *dr = mcs->dr;
515 unsigned char *buffer = mcs->ctrl_buf;
516 int ret;
3f542974 517
3f542974
PS		 518 dr->bRequestType = MCS_RD_RTYPE;
519 dr->bRequest = MCS_RDREQ;
880af9db 520 dr->wValue = cpu_to_le16(Wval); /* 0 */
3f542974
PS		 521 dr->wIndex = cpu_to_le16(reg);
522 dr->wLength = cpu_to_le16(2);
523
524 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
525 (unsigned char *)dr, buffer, 2,
526 mos7840_control_callback, mcs);
527 mcs->control_urb->transfer_buffer_length = 2;
528 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
529 return ret;
530}
531
0eafe4de
D		 532static void mos7840_set_led_callback(struct urb *urb)
533{
534 switch (urb->status) {
535 case 0:
536 /* Success */
537 break;
538 case -ECONNRESET:
539 case -ENOENT:
540 case -ESHUTDOWN:
541 /* This urb is terminated, clean up */
9c134a14
GKH		 542 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
543 __func__, urb->status);
0eafe4de
D		 544 break;
545 default:
9c134a14
GKH		 546 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
547 __func__, urb->status);
0eafe4de
D		 548 }
549}
550
551static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
552 __u16 reg)
553{
554 struct usb_device *dev = mcs->port->serial->dev;
555 struct usb_ctrlrequest *dr = mcs->dr;
556
557 dr->bRequestType = MCS_WR_RTYPE;
558 dr->bRequest = MCS_WRREQ;
559 dr->wValue = cpu_to_le16(wval);
560 dr->wIndex = cpu_to_le16(reg);
561 dr->wLength = cpu_to_le16(0);
562
563 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),
564 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
565
566 usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
567}
568
569static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
570 __u16 val)
571{
572 struct usb_device *dev = port->serial->dev;
573
574 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
575 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
576}
577
578static void mos7840_led_off(unsigned long arg)
579{
580 struct moschip_port *mcs = (struct moschip_port *) arg;
581
582 /* Turn off LED */
583 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
584 mod_timer(&mcs->led_timer2,
585 jiffies + msecs_to_jiffies(LED_OFF_MS));
586}
587
588static void mos7840_led_flag_off(unsigned long arg)
589{
590 struct moschip_port *mcs = (struct moschip_port *) arg;
591
592 mcs->led_flag = false;
593}
594
3f542974
PS		 595/*****************************************************************************
596 * mos7840_interrupt_callback
597 * this is the callback function for when we have received data on the
598 * interrupt endpoint.
599 *****************************************************************************/
600
7d12e780 601static void mos7840_interrupt_callback(struct urb *urb)
3f542974
PS		 602{
603 int result;
604 int length;
605 struct moschip_port *mos7840_port;
606 struct usb_serial *serial;
607 __u16 Data;
608 unsigned char *data;
609 __u8 sp[5], st;
0de9a702
ON		 610 int i, rv = 0;
611 __u16 wval, wreg = 0;
0643c724 612 int status = urb->status;
3f542974 613
0643c724 614 switch (status) {
3f542974
PS		 615 case 0:
616 /* success */
617 break;
618 case -ECONNRESET:
619 case -ENOENT:
620 case -ESHUTDOWN:
621 /* this urb is terminated, clean up */
9c134a14
GKH		 622 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
623 __func__, status);
3f542974
PS		 624 return;
625 default:
9c134a14
GKH		 626 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
627 __func__, status);
3f542974
PS		 628 goto exit;
629 }
630
631 length = urb->actual_length;
632 data = urb->transfer_buffer;
633
cdc97792 634 serial = urb->context;
3f542974
PS		 635
636 /* Moschip get 5 bytes
637 * Byte 1 IIR Port 1 (port.number is 0)
638 * Byte 2 IIR Port 2 (port.number is 1)
639 * Byte 3 IIR Port 3 (port.number is 2)
640 * Byte 4 IIR Port 4 (port.number is 3)
641 * Byte 5 FIFO status for both */
642
643 if (length && length > 5) {
9c134a14 644 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
3f542974
PS		 645 return;
646 }
647
648 sp[0] = (__u8) data[0];
649 sp[1] = (__u8) data[1];
650 sp[2] = (__u8) data[2];
651 sp[3] = (__u8) data[3];
652 st = (__u8) data[4];
653
654 for (i = 0; i < serial->num_ports; i++) {
655 mos7840_port = mos7840_get_port_private(serial->port[i]);
656 wval =
657 (((__u16) serial->port[i]->number -
658 (__u16) (serial->minor)) + 1) << 8;
659 if (mos7840_port->open) {
660 if (sp[i] & 0x01) {
9c134a14 661 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
3f542974
PS		 662 } else {
663 switch (sp[i] & 0x0f) {
664 case SERIAL_IIR_RLS:
9c134a14
GKH		 665 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
666 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
3f542974 667 mos7840_port->MsrLsr = 1;
0de9a702 668 wreg = LINE_STATUS_REGISTER;
3f542974
PS		 669 break;
670 case SERIAL_IIR_MS:
9c134a14 671 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
3f542974 672 mos7840_port->MsrLsr = 0;
0de9a702 673 wreg = MODEM_STATUS_REGISTER;
3f542974
PS		 674 break;
675 }
e681b66f 676 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
3f542974
PS		 677 }
678 }
679 }
880af9db
AC		 680 if (!(rv < 0))
681 /* the completion handler for the control urb will resubmit */
0de9a702
ON		 682 return;
683exit:
3f542974
PS		 684 result = usb_submit_urb(urb, GFP_ATOMIC);
685 if (result) {
686 dev_err(&urb->dev->dev,
687 "%s - Error %d submitting interrupt urb\n",
441b62c1 688 __func__, result);
3f542974 689 }
3f542974
PS		 690}
691
692static int mos7840_port_paranoia_check(struct usb_serial_port *port,
693 const char *function)
694{
695 if (!port) {
9c134a14 696 pr_debug("%s - port == NULL\n", function);
3f542974
PS		 697 return -1;
698 }
699 if (!port->serial) {
9c134a14 700 pr_debug("%s - port->serial == NULL\n", function);
3f542974
PS		 701 return -1;
702 }
703
704 return 0;
705}
706
707/* Inline functions to check the sanity of a pointer that is passed to us */
708static int mos7840_serial_paranoia_check(struct usb_serial *serial,
709 const char *function)
710{
711 if (!serial) {
9c134a14 712 pr_debug("%s - serial == NULL\n", function);
3f542974
PS		 713 return -1;
714 }
715 if (!serial->type) {
9c134a14 716 pr_debug("%s - serial->type == NULL!\n", function);
3f542974
PS		 717 return -1;
718 }
719
720 return 0;
721}
722
723static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
724 const char *function)
725{
726 /* if no port was specified, or it fails a paranoia check */
727 if (!port ||
728 mos7840_port_paranoia_check(port, function) ||
729 mos7840_serial_paranoia_check(port->serial, function)) {
880af9db
AC		 730 /* then say that we don't have a valid usb_serial thing,
731 * which will end up genrating -ENODEV return values */
3f542974
PS		 732 return NULL;
733 }
734
735 return port->serial;
736}
737
738/*****************************************************************************
739 * mos7840_bulk_in_callback
740 * this is the callback function for when we have received data on the
741 * bulk in endpoint.
742 *****************************************************************************/
743
7d12e780 744static void mos7840_bulk_in_callback(struct urb *urb)
3f542974 745{
0643c724 746 int retval;
3f542974
PS		 747 unsigned char *data;
748 struct usb_serial *serial;
749 struct usb_serial_port *port;
750 struct moschip_port *mos7840_port;
751 struct tty_struct *tty;
0643c724 752 int status = urb->status;
3f542974 753
cdc97792 754 mos7840_port = urb->context;
9c134a14 755 if (!mos7840_port)
50de36f7 756 return;
50de36f7
GKH		 757
758 if (status) {
9c134a14 759 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
50de36f7 760 mos7840_port->read_urb_busy = false;
3f542974
PS		 761 return;
762 }
763
9c134a14 764 port = mos7840_port->port;
441b62c1 765 if (mos7840_port_paranoia_check(port, __func__)) {
50de36f7 766 mos7840_port->read_urb_busy = false;
3f542974
PS		 767 return;
768 }
769
441b62c1 770 serial = mos7840_get_usb_serial(port, __func__);
3f542974 771 if (!serial) {
50de36f7 772 mos7840_port->read_urb_busy = false;
3f542974
PS		 773 return;
774 }
775
3f542974 776 data = urb->transfer_buffer;
59d33f2f 777 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
3f542974 778
3f542974 779 if (urb->actual_length) {
4a90f09b 780 tty = tty_port_tty_get(&mos7840_port->port->port);
3f542974 781 if (tty) {
3f542974 782 tty_insert_flip_string(tty, data, urb->actual_length);
3f542974 783 tty_flip_buffer_push(tty);
4a90f09b 784 tty_kref_put(tty);
3f542974
PS		 785 }
786 mos7840_port->icount.rx += urb->actual_length;
0de9a702 787 smp_wmb();
9c134a14 788 dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx);
3f542974
PS		 789 }
790
791 if (!mos7840_port->read_urb) {
9c134a14 792 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
50de36f7 793 mos7840_port->read_urb_busy = false;
3f542974
PS		 794 return;
795 }
796
0eafe4de
D		 797 /* Turn on LED */
798 if (mos7840_port->has_led && !mos7840_port->led_flag) {
799 mos7840_port->led_flag = true;
800 mos7840_set_led_async(mos7840_port, 0x0301,
801 MODEM_CONTROL_REGISTER);
802 mod_timer(&mos7840_port->led_timer1,
803 jiffies + msecs_to_jiffies(LED_ON_MS));
804 }
3f542974 805
50de36f7 806 mos7840_port->read_urb_busy = true;
0643c724 807 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
0de9a702 808
0643c724 809 if (retval) {
9c134a14 810 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
50de36f7 811 mos7840_port->read_urb_busy = false;
3f542974
PS		 812 }
813}
814
815/*****************************************************************************
816 * mos7840_bulk_out_data_callback
880af9db
AC		 817 * this is the callback function for when we have finished sending
818 * serial data on the bulk out endpoint.
3f542974
PS		 819 *****************************************************************************/
820
7d12e780 821static void mos7840_bulk_out_data_callback(struct urb *urb)
3f542974
PS		 822{
823 struct moschip_port *mos7840_port;
9c134a14 824 struct usb_serial_port *port;
3f542974 825 struct tty_struct *tty;
0643c724 826 int status = urb->status;
0de9a702
ON		 827 int i;
828
cdc97792 829 mos7840_port = urb->context;
9c134a14 830 port = mos7840_port->port;
0de9a702
ON		 831 spin_lock(&mos7840_port->pool_lock);
832 for (i = 0; i < NUM_URBS; i++) {
833 if (urb == mos7840_port->write_urb_pool[i]) {
834 mos7840_port->busy[i] = 0;
835 break;
836 }
837 }
838 spin_unlock(&mos7840_port->pool_lock);
839
0643c724 840 if (status) {
9c134a14 841 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
3f542974
PS		 842 return;
843 }
844
9c134a14 845 if (mos7840_port_paranoia_check(port, __func__))
3f542974 846 return;
3f542974 847
9c134a14 848 tty = tty_port_tty_get(&port->port);
b963a844
JS		 849 if (tty && mos7840_port->open)
850 tty_wakeup(tty);
4a90f09b 851 tty_kref_put(tty);
3f542974
PS		 852
853}
854
855/************************************************************************/
856/* 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 */
857/************************************************************************/
858#ifdef MCSSerialProbe
859static int mos7840_serial_probe(struct usb_serial *serial,
860 const struct usb_device_id *id)
861{
862
863 /*need to implement the mode_reg reading and updating\
864 structures usb_serial_ device_type\
865 (i.e num_ports, num_bulkin,bulkout etc) */
866 /* Also we can update the changes attach */
867 return 1;
868}
869#endif
870
871/*****************************************************************************
872 * mos7840_open
873 * this function is called by the tty driver when a port is opened
874 * If successful, we return 0
875 * Otherwise we return a negative error number.
876 *****************************************************************************/
877
a509a7e4 878static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
3f542974
PS		 879{
880 int response;
881 int j;
882 struct usb_serial *serial;
883 struct urb *urb;
884 __u16 Data;
885 int status;
886 struct moschip_port *mos7840_port;
0de9a702 887 struct moschip_port *port0;
3f542974 888
9c134a14 889 if (mos7840_port_paranoia_check(port, __func__))
3f542974 890 return -ENODEV;
3f542974 891
3f542974
PS		 892 serial = port->serial;
893
9c134a14 894 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 895 return -ENODEV;
3f542974
PS		 896
897 mos7840_port = mos7840_get_port_private(port);
0de9a702 898 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 899
0de9a702 900 if (mos7840_port == NULL || port0 == NULL)
3f542974
PS		 901 return -ENODEV;
902
903 usb_clear_halt(serial->dev, port->write_urb->pipe);
904 usb_clear_halt(serial->dev, port->read_urb->pipe);
0de9a702 905 port0->open_ports++;
3f542974
PS		 906
907 /* Initialising the write urb pool */
908 for (j = 0; j < NUM_URBS; ++j) {
0de9a702 909 urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974
PS		 910 mos7840_port->write_urb_pool[j] = urb;
911
912 if (urb == NULL) {
194343d9 913 dev_err(&port->dev, "No more urbs???\n");
3f542974
PS		 914 continue;
915 }
916
880af9db
AC		 917 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
918 GFP_KERNEL);
3f542974 919 if (!urb->transfer_buffer) {
0de9a702
ON		 920 usb_free_urb(urb);
921 mos7840_port->write_urb_pool[j] = NULL;
194343d9
GKH		 922 dev_err(&port->dev,
923 "%s-out of memory for urb buffers.\n",
924 __func__);
3f542974
PS		 925 continue;
926 }
927 }
928
929/*****************************************************************************
930 * Initialize MCS7840 -- Write Init values to corresponding Registers
931 *
932 * Register Index
933 * 1 : IER
934 * 2 : FCR
935 * 3 : LCR
936 * 4 : MCR
937 *
938 * 0x08 : SP1/2 Control Reg
939 *****************************************************************************/
940
880af9db 941 /* NEED to check the following Block */
3f542974 942
3f542974
PS		 943 Data = 0x0;
944 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
945 if (status < 0) {
9c134a14 946 dev_dbg(&port->dev, "Reading Spreg failed\n");
3f542974
PS		 947 return -1;
948 }
949 Data |= 0x80;
950 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
951 if (status < 0) {
9c134a14 952 dev_dbg(&port->dev, "writing Spreg failed\n");
3f542974
PS		 953 return -1;
954 }
955
956 Data &= ~0x80;
957 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
958 if (status < 0) {
9c134a14 959 dev_dbg(&port->dev, "writing Spreg failed\n");
3f542974
PS		 960 return -1;
961 }
880af9db 962 /* End of block to be checked */
3f542974 963
3f542974 964 Data = 0x0;
880af9db
AC		 965 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
966 &Data);
3f542974 967 if (status < 0) {
9c134a14 968 dev_dbg(&port->dev, "Reading Controlreg failed\n");
3f542974
PS		 969 return -1;
970 }
880af9db
AC		 971 Data |= 0x08; /* Driver done bit */
972 Data |= 0x20; /* rx_disable */
973 status = mos7840_set_reg_sync(port,
974 mos7840_port->ControlRegOffset, Data);
3f542974 975 if (status < 0) {
9c134a14 976 dev_dbg(&port->dev, "writing Controlreg failed\n");
3f542974
PS		 977 return -1;
978 }
880af9db
AC		 979 /* do register settings here */
980 /* Set all regs to the device default values. */
981 /***********************************
982 * First Disable all interrupts.
983 ***********************************/
3f542974 984 Data = 0x00;
3f542974
PS		 985 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
986 if (status < 0) {
9c134a14 987 dev_dbg(&port->dev, "disabling interrupts failed\n");
3f542974
PS		 988 return -1;
989 }
880af9db 990 /* Set FIFO_CONTROL_REGISTER to the default value */
3f542974 991 Data = 0x00;
3f542974
PS		 992 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
993 if (status < 0) {
9c134a14 994 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
3f542974
PS		 995 return -1;
996 }
997
998 Data = 0xcf;
3f542974
PS		 999 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1000 if (status < 0) {
9c134a14 1001 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
3f542974
PS		 1002 return -1;
1003 }
1004
1005 Data = 0x03;
3f542974
PS		 1006 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1007 mos7840_port->shadowLCR = Data;
1008
1009 Data = 0x0b;
3f542974
PS		 1010 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1011 mos7840_port->shadowMCR = Data;
1012
1013 Data = 0x00;
3f542974
PS		 1014 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1015 mos7840_port->shadowLCR = Data;
1016
880af9db 1017 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1018 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1019
1020 Data = 0x0c;
3f542974
PS		 1021 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1022
1023 Data = 0x0;
3f542974
PS		 1024 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1025
1026 Data = 0x00;
3f542974
PS		 1027 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1028
1029 Data = Data & ~SERIAL_LCR_DLAB;
3f542974
PS		 1030 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1031 mos7840_port->shadowLCR = Data;
1032
880af9db 1033 /* clearing Bulkin and Bulkout Fifo */
3f542974 1034 Data = 0x0;
3f542974
PS		 1035 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1036
1037 Data = Data | 0x0c;
3f542974
PS		 1038 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1039
1040 Data = Data & ~0x0c;
3f542974 1041 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
880af9db 1042 /* Finally enable all interrupts */
3f542974 1043 Data = 0x0c;
3f542974
PS		 1044 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1045
880af9db 1046 /* clearing rx_disable */
3f542974 1047 Data = 0x0;
880af9db
AC		 1048 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1049 &Data);
3f542974 1050 Data = Data & ~0x20;
880af9db
AC		 1051 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1052 Data);
3f542974 1053
880af9db 1054 /* rx_negate */
3f542974 1055 Data = 0x0;
880af9db
AC		 1056 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1057 &Data);
3f542974 1058 Data = Data | 0x10;
880af9db
AC		 1059 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1060 Data);
3f542974 1061
880af9db
AC		 1062 /* Check to see if we've set up our endpoint info yet *
1063 * (can't set it up in mos7840_startup as the structures *
1064 * were not set up at that time.) */
0de9a702 1065 if (port0->open_ports == 1) {
3f542974 1066 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1067 /* set up interrupt urb */
3f542974 1068 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1069 serial->dev,
1070 usb_rcvintpipe(serial->dev,
1071 serial->port[0]->interrupt_in_endpointAddress),
1072 serial->port[0]->interrupt_in_buffer,
1073 serial->port[0]->interrupt_in_urb->
1074 transfer_buffer_length,
1075 mos7840_interrupt_callback,
1076 serial,
1077 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1078
1079 /* start interrupt read for mos7840 *
1080 * will continue as long as mos7840 is connected */
1081
1082 response =
1083 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1084 GFP_KERNEL);
1085 if (response) {
194343d9
GKH		 1086 dev_err(&port->dev, "%s - Error %d submitting "
1087 "interrupt urb\n", __func__, response);
3f542974
PS		 1088 }
1089
1090 }
1091
1092 }
1093
1094 /* see if we've set up our endpoint info yet *
1095 * (can't set it up in mos7840_startup as the *
1096 * structures were not set up at that time.) */
1097
9c134a14
GKH		 1098 dev_dbg(&port->dev, "port number is %d\n", port->number);
1099 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor);
1100 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1101 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1102 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1103 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
3f542974
PS		 1104 mos7840_port->read_urb = port->read_urb;
1105
1106 /* set up our bulk in urb */
093ea2d3
DL		 1107 if ((serial->num_ports == 2)
1108 && ((((__u16)port->number -
1109 (__u16)(port->serial->minor)) % 2) != 0)) {
1110 usb_fill_bulk_urb(mos7840_port->read_urb,
1111 serial->dev,
1112 usb_rcvbulkpipe(serial->dev,
1113 (port->bulk_in_endpointAddress) + 2),
1114 port->bulk_in_buffer,
1115 mos7840_port->read_urb->transfer_buffer_length,
1116 mos7840_bulk_in_callback, mos7840_port);
1117 } else {
1118 usb_fill_bulk_urb(mos7840_port->read_urb,
1119 serial->dev,
1120 usb_rcvbulkpipe(serial->dev,
1121 port->bulk_in_endpointAddress),
1122 port->bulk_in_buffer,
1123 mos7840_port->read_urb->transfer_buffer_length,
1124 mos7840_bulk_in_callback, mos7840_port);
1125 }
3f542974 1126
9c134a14 1127 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
50de36f7 1128 mos7840_port->read_urb_busy = true;
3f542974
PS		 1129 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1130 if (response) {
194343d9
GKH		 1131 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1132 __func__, response);
50de36f7 1133 mos7840_port->read_urb_busy = false;
3f542974
PS		 1134 }
1135
1136 /* initialize our wait queues */
1137 init_waitqueue_head(&mos7840_port->wait_chase);
1138 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1139
1140 /* initialize our icount structure */
1141 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1142
1143 /* initialize our port settings */
880af9db
AC		 1144 /* Must set to enable ints! */
1145 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1146 /* send a open port command */
1147 mos7840_port->open = 1;
880af9db 1148 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974
PS		 1149 mos7840_port->icount.tx = 0;
1150 mos7840_port->icount.rx = 0;
1151
3f542974 1152 return 0;
3f542974
PS		 1153}
1154
1155/*****************************************************************************
1156 * mos7840_chars_in_buffer
1157 * this function is called by the tty driver when it wants to know how many
1158 * bytes of data we currently have outstanding in the port (data that has
1159 * been written, but hasn't made it out the port yet)
1160 * If successful, we return the number of bytes left to be written in the
1161 * system,
95da310e 1162 * Otherwise we return zero.
3f542974
PS		 1163 *****************************************************************************/
1164
95da310e 1165static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1166{
95da310e 1167 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1168 int i;
1169 int chars = 0;
0de9a702 1170 unsigned long flags;
3f542974
PS		 1171 struct moschip_port *mos7840_port;
1172
9c134a14 1173 if (mos7840_port_paranoia_check(port, __func__))
95da310e 1174 return 0;
3f542974
PS		 1175
1176 mos7840_port = mos7840_get_port_private(port);
3363155b 1177 if (mos7840_port == NULL)
95da310e 1178 return 0;
3f542974 1179
880af9db 1180 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
5c263b92
MF		 1181 for (i = 0; i < NUM_URBS; ++i) {
1182 if (mos7840_port->busy[i]) {
1183 struct urb *urb = mos7840_port->write_urb_pool[i];
1184 chars += urb->transfer_buffer_length;
1185 }
1186 }
880af9db 1187 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
9c134a14 1188 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
0de9a702 1189 return chars;
3f542974
PS		 1190
1191}
1192
3f542974
PS		 1193/*****************************************************************************
1194 * mos7840_close
1195 * this function is called by the tty driver when a port is closed
1196 *****************************************************************************/
1197
335f8514 1198static void mos7840_close(struct usb_serial_port *port)
3f542974
PS		 1199{
1200 struct usb_serial *serial;
1201 struct moschip_port *mos7840_port;
0de9a702 1202 struct moschip_port *port0;
3f542974
PS		 1203 int j;
1204 __u16 Data;
1205
9c134a14 1206 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1207 return;
3f542974 1208
441b62c1 1209 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1210 if (!serial)
3f542974 1211 return;
3f542974
PS		 1212
1213 mos7840_port = mos7840_get_port_private(port);
0de9a702 1214 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1215
0de9a702 1216 if (mos7840_port == NULL || port0 == NULL)
3f542974 1217 return;
3f542974
PS		 1218
1219 for (j = 0; j < NUM_URBS; ++j)
1220 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1221
1222 /* Freeing Write URBs */
1223 for (j = 0; j < NUM_URBS; ++j) {
1224 if (mos7840_port->write_urb_pool[j]) {
1225 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1226 kfree(mos7840_port->write_urb_pool[j]->
1227 transfer_buffer);
1228
1229 usb_free_urb(mos7840_port->write_urb_pool[j]);
1230 }
1231 }
1232
3f542974
PS		 1233 /* While closing port, shutdown all bulk read, write *
1234 * and interrupt read if they exists */
1235 if (serial->dev) {
3f542974 1236 if (mos7840_port->write_urb) {
9c134a14 1237 dev_dbg(&port->dev, "%s", "Shutdown bulk write\n");
3f542974
PS		 1238 usb_kill_urb(mos7840_port->write_urb);
1239 }
3f542974 1240 if (mos7840_port->read_urb) {
9c134a14 1241 dev_dbg(&port->dev, "%s", "Shutdown bulk read\n");
3f542974 1242 usb_kill_urb(mos7840_port->read_urb);
50de36f7 1243 mos7840_port->read_urb_busy = false;
3f542974
PS		 1244 }
1245 if ((&mos7840_port->control_urb)) {
9c134a14 1246 dev_dbg(&port->dev, "%s", "Shutdown control read\n");
880af9db 1247 /*/ usb_kill_urb (mos7840_port->control_urb); */
3f542974
PS		 1248 }
1249 }
880af9db
AC		 1250/* if(mos7840_port->ctrl_buf != NULL) */
1251/* kfree(mos7840_port->ctrl_buf); */
0de9a702 1252 port0->open_ports--;
9c134a14 1253 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number);
0de9a702 1254 if (port0->open_ports == 0) {
3f542974 1255 if (serial->port[0]->interrupt_in_urb) {
9c134a14 1256 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
0de9a702 1257 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1258 }
1259 }
1260
1261 if (mos7840_port->write_urb) {
1262 /* if this urb had a transfer buffer already (old tx) free it */
880af9db 1263 if (mos7840_port->write_urb->transfer_buffer != NULL)
3f542974 1264 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1265 usb_free_urb(mos7840_port->write_urb);
1266 }
1267
1268 Data = 0x0;
1269 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1270
1271 Data = 0x00;
1272 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1273
1274 mos7840_port->open = 0;
3f542974
PS		 1275}
1276
1277/************************************************************************
1278 *
1279 * mos7840_block_until_chase_response
1280 *
1281 * This function will block the close until one of the following:
1282 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1283 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1284 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1285 *
1286 ************************************************************************/
1287
95da310e
AC		 1288static void mos7840_block_until_chase_response(struct tty_struct *tty,
1289 struct moschip_port *mos7840_port)
3f542974 1290{
1e658489 1291 int timeout = msecs_to_jiffies(1000);
3f542974
PS		 1292 int wait = 10;
1293 int count;
1294
1295 while (1) {
95da310e 1296 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1297
1298 /* Check for Buffer status */
880af9db 1299 if (count <= 0)
3f542974 1300 return;
3f542974
PS		 1301
1302 /* Block the thread for a while */
1303 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1304 timeout);
1305 /* No activity.. count down section */
1306 wait--;
1307 if (wait == 0) {
9c134a14 1308 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__);
3f542974
PS		 1309 return;
1310 } else {
dc0d5c1e 1311 /* Reset timeout value back to seconds */
3f542974
PS		 1312 wait = 10;
1313 }
1314 }
1315
1316}
1317
1318/*****************************************************************************
1319 * mos7840_break
1320 * this function sends a break to the port
1321 *****************************************************************************/
95da310e 1322static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1323{
95da310e 1324 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1325 unsigned char data;
1326 struct usb_serial *serial;
1327 struct moschip_port *mos7840_port;
1328
9c134a14 1329 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1330 return;
3f542974 1331
441b62c1 1332 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1333 if (!serial)
3f542974 1334 return;
3f542974
PS		 1335
1336 mos7840_port = mos7840_get_port_private(port);
1337
880af9db 1338 if (mos7840_port == NULL)
3f542974 1339 return;
3f542974 1340
95da310e 1341 if (serial->dev)
3f542974 1342 /* flush and block until tx is empty */
95da310e 1343 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1344
95da310e 1345 if (break_state == -1)
3f542974 1346 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1347 else
3f542974 1348 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974 1349
6b447f04 1350 /* FIXME: no locking on shadowLCR anywhere in driver */
3f542974 1351 mos7840_port->shadowLCR = data;
9c134a14 1352 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1353 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1354 mos7840_port->shadowLCR);
3f542974
PS		 1355}
1356
1357/*****************************************************************************
1358 * mos7840_write_room
1359 * this function is called by the tty driver when it wants to know how many
1360 * bytes of data we can accept for a specific port.
1361 * If successful, we return the amount of room that we have for this port
1362 * Otherwise we return a negative error number.
1363 *****************************************************************************/
1364
95da310e 1365static int mos7840_write_room(struct tty_struct *tty)
3f542974 1366{
95da310e 1367 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1368 int i;
1369 int room = 0;
0de9a702 1370 unsigned long flags;
3f542974
PS		 1371 struct moschip_port *mos7840_port;
1372
9c134a14 1373 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1374 return -1;
3f542974
PS		 1375
1376 mos7840_port = mos7840_get_port_private(port);
9c134a14 1377 if (mos7840_port == NULL)
3f542974 1378 return -1;
3f542974 1379
0de9a702 1380 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1381 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1382 if (!mos7840_port->busy[i])
3f542974 1383 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1384 }
0de9a702 1385 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1386
0de9a702 1387 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
9c134a14 1388 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
0de9a702 1389 return room;
3f542974
PS		 1390
1391}
1392
1393/*****************************************************************************
1394 * mos7840_write
1395 * this function is called by the tty driver when data should be written to
1396 * the port.
1397 * If successful, we return the number of bytes written, otherwise we
1398 * return a negative error number.
1399 *****************************************************************************/
1400
95da310e 1401static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1402 const unsigned char *data, int count)
1403{
1404 int status;
1405 int i;
1406 int bytes_sent = 0;
1407 int transfer_size;
0de9a702 1408 unsigned long flags;
3f542974
PS		 1409
1410 struct moschip_port *mos7840_port;
1411 struct usb_serial *serial;
1412 struct urb *urb;
880af9db 1413 /* __u16 Data; */
3f542974
PS		 1414 const unsigned char *current_position = data;
1415 unsigned char *data1;
3f542974
PS		 1416
1417#ifdef NOTMOS7840
1418 Data = 0x00;
3f542974
PS		 1419 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1420 mos7840_port->shadowLCR = Data;
9c134a14
GKH		 1421 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1422 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974 1423
880af9db
AC		 1424 /* Data = 0x03; */
1425 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1426 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1427
880af9db 1428 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1429 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1430
880af9db
AC		 1431 /* Data = 0x0c; */
1432 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1433 Data = 0x00;
3f542974 1434 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
9c134a14 1435 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
3f542974
PS		 1436
1437 Data = 0x0;
3f542974 1438 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
9c134a14 1439 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
3f542974
PS		 1440
1441 Data = Data & ~SERIAL_LCR_DLAB;
9c134a14 1442 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1443 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1444#endif
1445
9c134a14 1446 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1447 return -1;
3f542974
PS		 1448
1449 serial = port->serial;
9c134a14 1450 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 1451 return -1;
3f542974
PS		 1452
1453 mos7840_port = mos7840_get_port_private(port);
9c134a14 1454 if (mos7840_port == NULL)
3f542974 1455 return -1;
3f542974
PS		 1456
1457 /* try to find a free urb in the list */
1458 urb = NULL;
1459
0de9a702 1460 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1461 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1462 if (!mos7840_port->busy[i]) {
1463 mos7840_port->busy[i] = 1;
3f542974 1464 urb = mos7840_port->write_urb_pool[i];
9c134a14 1465 dev_dbg(&port->dev, "URB:%d\n", i);
3f542974
PS		 1466 break;
1467 }
1468 }
0de9a702 1469 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1470
1471 if (urb == NULL) {
9c134a14 1472 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
3f542974
PS		 1473 goto exit;
1474 }
1475
1476 if (urb->transfer_buffer == NULL) {
1477 urb->transfer_buffer =
1478 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1479
1480 if (urb->transfer_buffer == NULL) {
22a416c4 1481 dev_err_console(port, "%s no more kernel memory...\n",
194343d9 1482 __func__);
3f542974
PS		 1483 goto exit;
1484 }
1485 }
1486 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1487
97c4965d 1488 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1489
1490 /* fill urb with data and submit */
093ea2d3
DL		 1491 if ((serial->num_ports == 2)
1492 && ((((__u16)port->number -
1493 (__u16)(port->serial->minor)) % 2) != 0)) {
1494 usb_fill_bulk_urb(urb,
1495 serial->dev,
1496 usb_sndbulkpipe(serial->dev,
1497 (port->bulk_out_endpointAddress) + 2),
1498 urb->transfer_buffer,
1499 transfer_size,
1500 mos7840_bulk_out_data_callback, mos7840_port);
1501 } else {
1502 usb_fill_bulk_urb(urb,
1503 serial->dev,
1504 usb_sndbulkpipe(serial->dev,
1505 port->bulk_out_endpointAddress),
1506 urb->transfer_buffer,
1507 transfer_size,
1508 mos7840_bulk_out_data_callback, mos7840_port);
1509 }
3f542974
PS		 1510
1511 data1 = urb->transfer_buffer;
9c134a14 1512 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
3f542974 1513
0eafe4de
D		 1514 /* Turn on LED */
1515 if (mos7840_port->has_led && !mos7840_port->led_flag) {
1516 mos7840_port->led_flag = true;
1517 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);
1518 mod_timer(&mos7840_port->led_timer1,
1519 jiffies + msecs_to_jiffies(LED_ON_MS));
1520 }
1521
3f542974
PS		 1522 /* send it down the pipe */
1523 status = usb_submit_urb(urb, GFP_ATOMIC);
1524
1525 if (status) {
0de9a702 1526 mos7840_port->busy[i] = 0;
22a416c4 1527 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
194343d9 1528 "with status = %d\n", __func__, status);
3f542974
PS		 1529 bytes_sent = status;
1530 goto exit;
1531 }
1532 bytes_sent = transfer_size;
1533 mos7840_port->icount.tx += transfer_size;
0de9a702 1534 smp_wmb();
9c134a14 1535 dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
95da310e 1536exit:
3f542974
PS		 1537 return bytes_sent;
1538
1539}
1540
1541/*****************************************************************************
1542 * mos7840_throttle
1543 * this function is called by the tty driver when it wants to stop the data
1544 * being read from the port.
1545 *****************************************************************************/
1546
95da310e 1547static void mos7840_throttle(struct tty_struct *tty)
3f542974 1548{
95da310e 1549 struct usb_serial_port *port = tty->driver_data;
3f542974 1550 struct moschip_port *mos7840_port;
3f542974
PS		 1551 int status;
1552
9c134a14 1553 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1554 return;
3f542974
PS		 1555
1556 mos7840_port = mos7840_get_port_private(port);
1557
1558 if (mos7840_port == NULL)
1559 return;
1560
1561 if (!mos7840_port->open) {
9c134a14 1562 dev_dbg(&port->dev, "%s", "port not opened\n");
3f542974
PS		 1563 return;
1564 }
1565
3f542974
PS		 1566 /* if we are implementing XON/XOFF, send the stop character */
1567 if (I_IXOFF(tty)) {
1568 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1569 status = mos7840_write(tty, port, &stop_char, 1);
1570 if (status <= 0)
3f542974 1571 return;
3f542974 1572 }
3f542974 1573 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1574 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1575 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1576 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1577 mos7840_port->shadowMCR);
95da310e 1578 if (status < 0)
3f542974 1579 return;
3f542974 1580 }
3f542974
PS		 1581}
1582
1583/*****************************************************************************
1584 * mos7840_unthrottle
880af9db
AC		 1585 * this function is called by the tty driver when it wants to resume
1586 * the data being read from the port (called after mos7840_throttle is
1587 * called)
3f542974 1588 *****************************************************************************/
95da310e 1589static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1590{
95da310e 1591 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1592 int status;
1593 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1594
9c134a14 1595 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1596 return;
3f542974
PS		 1597
1598 if (mos7840_port == NULL)
1599 return;
1600
1601 if (!mos7840_port->open) {
9c134a14 1602 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1603 return;
1604 }
1605
3f542974
PS		 1606 /* if we are implementing XON/XOFF, send the start character */
1607 if (I_IXOFF(tty)) {
1608 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1609 status = mos7840_write(tty, port, &start_char, 1);
1610 if (status <= 0)
3f542974 1611 return;
3f542974
PS		 1612 }
1613
1614 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1615 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1616 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1617 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1618 mos7840_port->shadowMCR);
95da310e 1619 if (status < 0)
3f542974 1620 return;
3f542974 1621 }
3f542974
PS		 1622}
1623
60b33c13 1624static int mos7840_tiocmget(struct tty_struct *tty)
3f542974 1625{
95da310e 1626 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1627 struct moschip_port *mos7840_port;
1628 unsigned int result;
1629 __u16 msr;
1630 __u16 mcr;
880af9db 1631 int status;
3f542974
PS		 1632 mos7840_port = mos7840_get_port_private(port);
1633
3f542974
PS		 1634 if (mos7840_port == NULL)
1635 return -ENODEV;
1636
1637 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1638 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1639 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1640 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1641 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1642 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1643 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1644 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1645 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1646
9c134a14 1647 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
3f542974
PS		 1648
1649 return result;
1650}
1651
20b9d177 1652static int mos7840_tiocmset(struct tty_struct *tty,
3f542974
PS		 1653 unsigned int set, unsigned int clear)
1654{
95da310e 1655 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1656 struct moschip_port *mos7840_port;
1657 unsigned int mcr;
87521c46 1658 int status;
3f542974 1659
3f542974
PS		 1660 mos7840_port = mos7840_get_port_private(port);
1661
1662 if (mos7840_port == NULL)
1663 return -ENODEV;
1664
e2984494 1665 /* FIXME: What locks the port registers ? */
3f542974
PS		 1666 mcr = mos7840_port->shadowMCR;
1667 if (clear & TIOCM_RTS)
1668 mcr &= ~MCR_RTS;
1669 if (clear & TIOCM_DTR)
1670 mcr &= ~MCR_DTR;
1671 if (clear & TIOCM_LOOP)
1672 mcr &= ~MCR_LOOPBACK;
1673
1674 if (set & TIOCM_RTS)
1675 mcr |= MCR_RTS;
1676 if (set & TIOCM_DTR)
1677 mcr |= MCR_DTR;
1678 if (set & TIOCM_LOOP)
1679 mcr |= MCR_LOOPBACK;
1680
1681 mos7840_port->shadowMCR = mcr;
1682
3f542974
PS		 1683 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1684 if (status < 0) {
9c134a14 1685 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
87521c46 1686 return status;
3f542974
PS		 1687 }
1688
1689 return 0;
1690}
1691
1692/*****************************************************************************
1693 * mos7840_calc_baud_rate_divisor
1694 * this function calculates the proper baud rate divisor for the specified
1695 * baud rate.
1696 *****************************************************************************/
9c134a14
GKH		 1697static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1698 int baudRate, int *divisor,
880af9db 1699 __u16 *clk_sel_val)
3f542974 1700{
9c134a14 1701 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
3f542974
PS		 1702
1703 if (baudRate <= 115200) {
1704 *divisor = 115200 / baudRate;
1705 *clk_sel_val = 0x0;
1706 }
1707 if ((baudRate > 115200) && (baudRate <= 230400)) {
1708 *divisor = 230400 / baudRate;
1709 *clk_sel_val = 0x10;
1710 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1711 *divisor = 403200 / baudRate;
1712 *clk_sel_val = 0x20;
1713 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1714 *divisor = 460800 / baudRate;
1715 *clk_sel_val = 0x30;
1716 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1717 *divisor = 806400 / baudRate;
1718 *clk_sel_val = 0x40;
1719 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1720 *divisor = 921600 / baudRate;
1721 *clk_sel_val = 0x50;
1722 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1723 *divisor = 1572864 / baudRate;
1724 *clk_sel_val = 0x60;
1725 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1726 *divisor = 3145728 / baudRate;
1727 *clk_sel_val = 0x70;
1728 }
1729 return 0;
1730
1731#ifdef NOTMCS7840
1732
1733 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1734 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1735 *divisor = mos7840_divisor_table[i].Divisor;
1736 return 0;
1737 }
1738 }
1739
1740 /* After trying for all the standard baud rates *
1741 * Try calculating the divisor for this baud rate */
1742
1743 if (baudrate > 75 && baudrate < 230400) {
1744 /* get the divisor */
1745 custom = (__u16) (230400L / baudrate);
1746
1747 /* Check for round off */
1748 round1 = (__u16) (2304000L / baudrate);
1749 round = (__u16) (round1 - (custom * 10));
880af9db 1750 if (round > 4)
3f542974 1751 custom++;
3f542974
PS		 1752 *divisor = custom;
1753
9c134a14 1754 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
3f542974
PS		 1755 return 0;
1756 }
1757
9c134a14 1758 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
3f542974
PS		 1759 return -1;
1760#endif
1761}
1762
1763/*****************************************************************************
1764 * mos7840_send_cmd_write_baud_rate
1765 * this function sends the proper command to change the baud rate of the
1766 * specified port.
1767 *****************************************************************************/
1768
1769static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1770 int baudRate)
1771{
1772 int divisor = 0;
1773 int status;
1774 __u16 Data;
1775 unsigned char number;
1776 __u16 clk_sel_val;
1777 struct usb_serial_port *port;
1778
1779 if (mos7840_port == NULL)
1780 return -1;
1781
9c134a14
GKH		 1782 port = mos7840_port->port;
1783 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1784 return -1;
3f542974 1785
9c134a14 1786 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1787 return -1;
3f542974 1788
3f542974
PS		 1789 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1790
9c134a14
GKH		 1791 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__,
1792 mos7840_port->port->number, baudRate);
880af9db 1793 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1794 if (baudRate > 115200) {
1795#ifdef HW_flow_control
880af9db
AC		 1796 /* NOTE: need to see the pther register to modify */
1797 /* setting h/w flow control bit to 1 */
3f542974
PS		 1798 Data = 0x2b;
1799 mos7840_port->shadowMCR = Data;
880af9db
AC		 1800 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1801 Data);
3f542974 1802 if (status < 0) {
9c134a14 1803 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1804 return -1;
1805 }
1806#endif
1807
1808 } else {
1809#ifdef HW_flow_control
093ea2d3 1810 /* setting h/w flow control bit to 0 */
3f542974
PS		 1811 Data = 0xb;
1812 mos7840_port->shadowMCR = Data;
880af9db
AC		 1813 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1814 Data);
3f542974 1815 if (status < 0) {
9c134a14 1816 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1817 return -1;
1818 }
1819#endif
1820
1821 }
1822
880af9db 1823 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1824 clk_sel_val = 0x0;
1825 Data = 0x0;
9c134a14 1826 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
3f542974 1827 &clk_sel_val);
880af9db
AC		 1828 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1829 &Data);
3f542974 1830 if (status < 0) {
9c134a14 1831 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
3f542974
PS		 1832 return -1;
1833 }
1834 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1835 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1836 Data);
3f542974 1837 if (status < 0) {
9c134a14 1838 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1839 return -1;
1840 }
1841 /* Calculate the Divisor */
1842
1843 if (status) {
194343d9 1844 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1845 return status;
1846 }
1847 /* Enable access to divisor latch */
1848 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1849 mos7840_port->shadowLCR = Data;
1850 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1851
1852 /* Write the divisor */
1853 Data = (unsigned char)(divisor & 0xff);
9c134a14 1854 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
3f542974
PS		 1855 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1856
1857 Data = (unsigned char)((divisor & 0xff00) >> 8);
9c134a14 1858 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
3f542974
PS		 1859 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1860
1861 /* Disable access to divisor latch */
1862 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1863 mos7840_port->shadowLCR = Data;
1864 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1865
1866 }
3f542974
PS		 1867 return status;
1868}
1869
1870/*****************************************************************************
1871 * mos7840_change_port_settings
1872 * This routine is called to set the UART on the device to match
1873 * the specified new settings.
1874 *****************************************************************************/
1875
95da310e
AC		 1876static void mos7840_change_port_settings(struct tty_struct *tty,
1877 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1878{
3f542974
PS		 1879 int baud;
1880 unsigned cflag;
1881 unsigned iflag;
1882 __u8 lData;
1883 __u8 lParity;
1884 __u8 lStop;
1885 int status;
1886 __u16 Data;
1887 struct usb_serial_port *port;
1888 struct usb_serial *serial;
1889
1890 if (mos7840_port == NULL)
1891 return;
1892
9c134a14 1893 port = mos7840_port->port;
3f542974 1894
9c134a14 1895 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1896 return;
3f542974 1897
9c134a14 1898 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1899 return;
3f542974
PS		 1900
1901 serial = port->serial;
1902
3f542974 1903 if (!mos7840_port->open) {
9c134a14 1904 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1905 return;
1906 }
1907
3f542974
PS		 1908 lData = LCR_BITS_8;
1909 lStop = LCR_STOP_1;
1910 lParity = LCR_PAR_NONE;
1911
adc8d746
AC		 1912 cflag = tty->termios.c_cflag;
1913 iflag = tty->termios.c_iflag;
3f542974
PS		 1914
1915 /* Change the number of bits */
1916 if (cflag & CSIZE) {
1917 switch (cflag & CSIZE) {
1918 case CS5:
1919 lData = LCR_BITS_5;
1920 break;
1921
1922 case CS6:
1923 lData = LCR_BITS_6;
1924 break;
1925
1926 case CS7:
1927 lData = LCR_BITS_7;
1928 break;
1929 default:
1930 case CS8:
1931 lData = LCR_BITS_8;
1932 break;
1933 }
1934 }
1935 /* Change the Parity bit */
1936 if (cflag & PARENB) {
1937 if (cflag & PARODD) {
1938 lParity = LCR_PAR_ODD;
9c134a14 1939 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
3f542974
PS		 1940 } else {
1941 lParity = LCR_PAR_EVEN;
9c134a14 1942 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
3f542974
PS		 1943 }
1944
1945 } else {
9c134a14 1946 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
3f542974
PS		 1947 }
1948
880af9db 1949 if (cflag & CMSPAR)
3f542974 1950 lParity = lParity | 0x20;
3f542974
PS		 1951
1952 /* Change the Stop bit */
1953 if (cflag & CSTOPB) {
1954 lStop = LCR_STOP_2;
9c134a14 1955 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
3f542974
PS		 1956 } else {
1957 lStop = LCR_STOP_1;
9c134a14 1958 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
3f542974
PS		 1959 }
1960
1961 /* Update the LCR with the correct value */
1962 mos7840_port->shadowLCR &=
1963 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1964 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1965
9c134a14
GKH		 1966 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1967 mos7840_port->shadowLCR);
3f542974
PS		 1968 /* Disable Interrupts */
1969 Data = 0x00;
1970 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1971
1972 Data = 0x00;
1973 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1974
1975 Data = 0xcf;
1976 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1977
1978 /* Send the updated LCR value to the mos7840 */
1979 Data = mos7840_port->shadowLCR;
1980
1981 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1982
1983 Data = 0x00b;
1984 mos7840_port->shadowMCR = Data;
1985 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1986 Data = 0x00b;
1987 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1988
1989 /* set up the MCR register and send it to the mos7840 */
1990
1991 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 1992 if (cflag & CBAUD)
3f542974 1993 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 1994
880af9db 1995 if (cflag & CRTSCTS)
3f542974 1996 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 1997 else
3f542974 1998 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 1999
2000 Data = mos7840_port->shadowMCR;
2001 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2002
2003 /* Determine divisor based on baud rate */
2004 baud = tty_get_baud_rate(tty);
2005
2006 if (!baud) {
2007 /* pick a default, any default... */
9c134a14 2008 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
3f542974
PS		 2009 baud = 9600;
2010 }
2011
9c134a14 2012 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
3f542974
PS		 2013 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2014
2015 /* Enable Interrupts */
2016 Data = 0x0c;
2017 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2018
50de36f7 2019 if (mos7840_port->read_urb_busy == false) {
50de36f7 2020 mos7840_port->read_urb_busy = true;
3f542974 2021 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
3f542974 2022 if (status) {
9c134a14 2023 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 2024 status);
50de36f7 2025 mos7840_port->read_urb_busy = false;
3f542974
PS		 2026 }
2027 }
2028 wake_up(&mos7840_port->delta_msr_wait);
2029 mos7840_port->delta_msr_cond = 1;
9c134a14
GKH		 2030 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
2031 mos7840_port->shadowLCR);
3f542974
PS		 2032}
2033
2034/*****************************************************************************
2035 * mos7840_set_termios
2036 * this function is called by the tty driver when it wants to change
2037 * the termios structure
2038 *****************************************************************************/
2039
95da310e
AC		 2040static void mos7840_set_termios(struct tty_struct *tty,
2041 struct usb_serial_port *port,
606d099c 2042 struct ktermios *old_termios)
3f542974
PS		 2043{
2044 int status;
2045 unsigned int cflag;
2046 struct usb_serial *serial;
2047 struct moschip_port *mos7840_port;
3363155b 2048
9c134a14 2049 if (mos7840_port_paranoia_check(port, __func__))
3f542974 2050 return;
3f542974
PS		 2051
2052 serial = port->serial;
2053
9c134a14 2054 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 2055 return;
3f542974
PS		 2056
2057 mos7840_port = mos7840_get_port_private(port);
2058
2059 if (mos7840_port == NULL)
2060 return;
2061
3f542974 2062 if (!mos7840_port->open) {
9c134a14 2063 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 2064 return;
2065 }
2066
9c134a14 2067 dev_dbg(&port->dev, "%s", "setting termios - \n");
3f542974 2068
adc8d746 2069 cflag = tty->termios.c_cflag;
3f542974 2070
9c134a14 2071 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
d9a80746 2072 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
9c134a14
GKH		 2073 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2074 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2075 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
3f542974
PS		 2076
2077 /* change the port settings to the new ones specified */
2078
95da310e 2079 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2080
2081 if (!mos7840_port->read_urb) {
9c134a14 2082 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
3f542974
PS		 2083 return;
2084 }
2085
50de36f7 2086 if (mos7840_port->read_urb_busy == false) {
50de36f7 2087 mos7840_port->read_urb_busy = true;
3f542974
PS		 2088 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2089 if (status) {
9c134a14 2090 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 2091 status);
50de36f7 2092 mos7840_port->read_urb_busy = false;
3f542974
PS		 2093 }
2094 }
3f542974
PS		 2095}
2096
2097/*****************************************************************************
2098 * mos7840_get_lsr_info - get line status register info
2099 *
2100 * Purpose: Let user call ioctl() to get info when the UART physically
2101 * is emptied. On bus types like RS485, the transmitter must
2102 * release the bus after transmitting. This must be done when
2103 * the transmit shift register is empty, not be done when the
2104 * transmit holding register is empty. This functionality
2105 * allows an RS485 driver to be written in user space.
2106 *****************************************************************************/
2107
95da310e 2108static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2109 unsigned int __user *value)
3f542974
PS		 2110{
2111 int count;
2112 unsigned int result = 0;
2113
95da310e 2114 count = mos7840_chars_in_buffer(tty);
9c134a14 2115 if (count == 0)
3f542974 2116 result = TIOCSER_TEMT;
3f542974
PS		 2117
2118 if (copy_to_user(value, &result, sizeof(int)))
2119 return -EFAULT;
2120 return 0;
2121}
2122
3f542974
PS		 2123/*****************************************************************************
2124 * mos7840_get_serial_info
2125 * function to get information about serial port
2126 *****************************************************************************/
2127
2128static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2129 struct serial_struct __user *retinfo)
3f542974
PS		 2130{
2131 struct serial_struct tmp;
2132
2133 if (mos7840_port == NULL)
2134 return -1;
2135
2136 if (!retinfo)
2137 return -EFAULT;
2138
2139 memset(&tmp, 0, sizeof(tmp));
2140
2141 tmp.type = PORT_16550A;
2142 tmp.line = mos7840_port->port->serial->minor;
2143 tmp.port = mos7840_port->port->number;
2144 tmp.irq = 0;
2145 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2146 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2147 tmp.baud_base = 9600;
2148 tmp.close_delay = 5 * HZ;
2149 tmp.closing_wait = 30 * HZ;
2150
2151 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2152 return -EFAULT;
2153 return 0;
2154}
2155
0bca1b91
AC		 2156static int mos7840_get_icount(struct tty_struct *tty,
2157 struct serial_icounter_struct *icount)
2158{
2159 struct usb_serial_port *port = tty->driver_data;
2160 struct moschip_port *mos7840_port;
2161 struct async_icount cnow;
2162
2163 mos7840_port = mos7840_get_port_private(port);
2164 cnow = mos7840_port->icount;
2165
2166 smp_rmb();
2167 icount->cts = cnow.cts;
2168 icount->dsr = cnow.dsr;
2169 icount->rng = cnow.rng;
2170 icount->dcd = cnow.dcd;
2171 icount->rx = cnow.rx;
2172 icount->tx = cnow.tx;
2173 icount->frame = cnow.frame;
2174 icount->overrun = cnow.overrun;
2175 icount->parity = cnow.parity;
2176 icount->brk = cnow.brk;
2177 icount->buf_overrun = cnow.buf_overrun;
2178
9c134a14
GKH		 2179 dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__,
2180 icount->rx, icount->tx);
0bca1b91
AC		 2181 return 0;
2182}
2183
3f542974
PS		 2184/*****************************************************************************
2185 * SerialIoctl
2186 * this function handles any ioctl calls to the driver
2187 *****************************************************************************/
2188
00a0d0d6 2189static int mos7840_ioctl(struct tty_struct *tty,
3f542974
PS		 2190 unsigned int cmd, unsigned long arg)
2191{
95da310e 2192 struct usb_serial_port *port = tty->driver_data;
97c4965d 2193 void __user *argp = (void __user *)arg;
3f542974 2194 struct moschip_port *mos7840_port;
3f542974
PS		 2195
2196 struct async_icount cnow;
2197 struct async_icount cprev;
3f542974 2198
9c134a14 2199 if (mos7840_port_paranoia_check(port, __func__))
3f542974 2200 return -1;
3f542974
PS		 2201
2202 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2203
2204 if (mos7840_port == NULL)
2205 return -1;
2206
9c134a14 2207 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
3f542974
PS		 2208
2209 switch (cmd) {
2210 /* return number of bytes available */
2211
3f542974 2212 case TIOCSERGETLSR:
9c134a14 2213 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
95da310e 2214 return mos7840_get_lsr_info(tty, argp);
3f542974 2215
3f542974 2216 case TIOCGSERIAL:
9c134a14 2217 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
97c4965d 2218 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2219
2220 case TIOCSSERIAL:
9c134a14 2221 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
3f542974
PS		 2222 break;
2223
2224 case TIOCMIWAIT:
9c134a14 2225 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__);
3f542974
PS		 2226 cprev = mos7840_port->icount;
2227 while (1) {
880af9db 2228 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974
PS		 2229 mos7840_port->delta_msr_cond = 0;
2230 wait_event_interruptible(mos7840_port->delta_msr_wait,
2231 (mos7840_port->
2232 delta_msr_cond == 1));
2233
2234 /* see if a signal did it */
2235 if (signal_pending(current))
2236 return -ERESTARTSYS;
2237 cnow = mos7840_port->icount;
0de9a702 2238 smp_rmb();
3f542974
PS		 2239 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2240 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2241 return -EIO; /* no change => error */
2242 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2243 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2244 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2245 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2246 return 0;
2247 }
2248 cprev = cnow;
2249 }
2250 /* NOTREACHED */
2251 break;
2252
3f542974
PS		 2253 default:
2254 break;
2255 }
3f542974
PS		 2256 return -ENOIOCTLCMD;
2257}
2258
0eafe4de
D		 2259static int mos7810_check(struct usb_serial *serial)
2260{
2261 int i, pass_count = 0;
2262 __u16 data = 0, mcr_data = 0;
2263 __u16 test_pattern = 0x55AA;
2264
2265 /* Store MCR setting */
2266 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2267 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2268 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2269
2270 for (i = 0; i < 16; i++) {
2271 /* Send the 1-bit test pattern out to MCS7810 test pin */
2272 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2273 MCS_WRREQ, MCS_WR_RTYPE,
2274 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2275 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2276
2277 /* Read the test pattern back */
2278 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2279 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2280 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2281
2282 /* If this is a MCS7810 device, both test patterns must match */
2283 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2284 break;
2285
2286 pass_count++;
2287 }
2288
2289 /* Restore MCR setting */
2290 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2291 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2292 0, MOS_WDR_TIMEOUT);
2293
2294 if (pass_count == 16)
2295 return 1;
2296
2297 return 0;
2298}
2299
3f542974
PS		 2300static int mos7840_calc_num_ports(struct usb_serial *serial)
2301{
0eafe4de 2302 __u16 data = 0x00;
093ea2d3
DL		 2303 int mos7840_num_ports;
2304
0eafe4de
D		 2305 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2306 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
093ea2d3
DL		 2307 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2308
0eafe4de
D		 2309 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||
2310 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {
2311 device_type = serial->dev->descriptor.idProduct;
093ea2d3 2312 } else {
0eafe4de
D		 2313 /* For a MCS7840 device GPIO0 must be set to 1 */
2314 if ((data & 0x01) == 1)
2315 device_type = MOSCHIP_DEVICE_ID_7840;
2316 else if (mos7810_check(serial))
2317 device_type = MOSCHIP_DEVICE_ID_7810;
2318 else
2319 device_type = MOSCHIP_DEVICE_ID_7820;
3f542974 2320 }
093ea2d3 2321
0eafe4de
D		 2322 mos7840_num_ports = (device_type >> 4) & 0x000F;
2323 serial->num_bulk_in = mos7840_num_ports;
2324 serial->num_bulk_out = mos7840_num_ports;
2325 serial->num_ports = mos7840_num_ports;
2326
3f542974
PS		 2327 return mos7840_num_ports;
2328}
2329
2330/****************************************************************************
2331 * mos7840_startup
2332 ****************************************************************************/
2333
2334static int mos7840_startup(struct usb_serial *serial)
2335{
2336 struct moschip_port *mos7840_port;
2337 struct usb_device *dev;
2338 int i, status;
3f542974 2339 __u16 Data;
3f542974 2340
3f542974
PS		 2341 dev = serial->dev;
2342
3f542974
PS		 2343 /* we set up the pointers to the endpoints in the mos7840_open *
2344 * function, as the structures aren't created yet. */
2345
2346 /* set up port private structures */
2347 for (i = 0; i < serial->num_ports; ++i) {
9c134a14 2348 dev_dbg(&dev->dev, "mos7840_startup: configuring port %d............\n", i);
7ac9da10 2349 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
3f542974 2350 if (mos7840_port == NULL) {
194343d9 2351 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
0de9a702
ON		 2352 status = -ENOMEM;
2353 i--; /* don't follow NULL pointer cleaning up */
2354 goto error;
3f542974 2355 }
3f542974 2356
880af9db
AC		 2357 /* Initialize all port interrupt end point to port 0 int
2358 * endpoint. Our device has only one interrupt end point
2359 * common to all port */
3f542974
PS		 2360
2361 mos7840_port->port = serial->port[i];
2362 mos7840_set_port_private(serial->port[i], mos7840_port);
0de9a702 2363 spin_lock_init(&mos7840_port->pool_lock);
3f542974 2364
37768adf
TC		 2365 /* minor is not initialised until later by
2366 * usb-serial.c:get_free_serial() and cannot therefore be used
2367 * to index device instances */
2368 mos7840_port->port_num = i + 1;
9c134a14
GKH		 2369 dev_dbg(&dev->dev, "serial->port[i]->number = %d\n", serial->port[i]->number);
2370 dev_dbg(&dev->dev, "serial->port[i]->serial->minor = %d\n", serial->port[i]->serial->minor);
2371 dev_dbg(&dev->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2372 dev_dbg(&dev->dev, "serial->minor = %d\n", serial->minor);
3f542974
PS		 2373
2374 if (mos7840_port->port_num == 1) {
2375 mos7840_port->SpRegOffset = 0x0;
2376 mos7840_port->ControlRegOffset = 0x1;
2377 mos7840_port->DcrRegOffset = 0x4;
2378 } else if ((mos7840_port->port_num == 2)
0de9a702 2379 && (serial->num_ports == 4)) {
3f542974
PS		 2380 mos7840_port->SpRegOffset = 0x8;
2381 mos7840_port->ControlRegOffset = 0x9;
2382 mos7840_port->DcrRegOffset = 0x16;
2383 } else if ((mos7840_port->port_num == 2)
0de9a702 2384 && (serial->num_ports == 2)) {
3f542974
PS		 2385 mos7840_port->SpRegOffset = 0xa;
2386 mos7840_port->ControlRegOffset = 0xb;
2387 mos7840_port->DcrRegOffset = 0x19;
2388 } else if ((mos7840_port->port_num == 3)
0de9a702 2389 && (serial->num_ports == 4)) {
3f542974
PS		 2390 mos7840_port->SpRegOffset = 0xa;
2391 mos7840_port->ControlRegOffset = 0xb;
2392 mos7840_port->DcrRegOffset = 0x19;
2393 } else if ((mos7840_port->port_num == 4)
0de9a702 2394 && (serial->num_ports == 4)) {
3f542974
PS		 2395 mos7840_port->SpRegOffset = 0xc;
2396 mos7840_port->ControlRegOffset = 0xd;
2397 mos7840_port->DcrRegOffset = 0x1c;
2398 }
9c134a14 2399 mos7840_dump_serial_port(serial->port[i], mos7840_port);
3f542974
PS		 2400 mos7840_set_port_private(serial->port[i], mos7840_port);
2401
880af9db
AC		 2402 /* enable rx_disable bit in control register */
2403 status = mos7840_get_reg_sync(serial->port[i],
2404 mos7840_port->ControlRegOffset, &Data);
3f542974 2405 if (status < 0) {
9c134a14 2406 dev_dbg(&dev->dev, "Reading ControlReg failed status-0x%x\n", status);
3f542974
PS		 2407 break;
2408 } else
9c134a14 2409 dev_dbg(&dev->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
880af9db
AC		 2410 Data |= 0x08; /* setting driver done bit */
2411 Data |= 0x04; /* sp1_bit to have cts change reflect in
2412 modem status reg */
3f542974 2413
880af9db
AC		 2414 /* Data |= 0x20; //rx_disable bit */
2415 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2416 mos7840_port->ControlRegOffset, Data);
2417 if (status < 0) {
9c134a14 2418 dev_dbg(&dev->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
3f542974
PS		 2419 break;
2420 } else
9c134a14 2421 dev_dbg(&dev->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
3f542974 2422
880af9db
AC		 2423 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2424 and 0x24 in DCR3 */
3f542974 2425 Data = 0x01;
880af9db
AC		 2426 status = mos7840_set_reg_sync(serial->port[i],
2427 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
3f542974 2428 if (status < 0) {
9c134a14 2429 dev_dbg(&dev->dev, "Writing DCR0 failed status-0x%x\n", status);
3f542974
PS		 2430 break;
2431 } else
9c134a14 2432 dev_dbg(&dev->dev, "DCR0 Writing success status%d\n", status);
3f542974
PS		 2433
2434 Data = 0x05;
880af9db
AC		 2435 status = mos7840_set_reg_sync(serial->port[i],
2436 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
3f542974 2437 if (status < 0) {
9c134a14 2438 dev_dbg(&dev->dev, "Writing DCR1 failed status-0x%x\n", status);
3f542974
PS		 2439 break;
2440 } else
9c134a14 2441 dev_dbg(&dev->dev, "DCR1 Writing success status%d\n", status);
3f542974
PS		 2442
2443 Data = 0x24;
880af9db
AC		 2444 status = mos7840_set_reg_sync(serial->port[i],
2445 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
3f542974 2446 if (status < 0) {
9c134a14 2447 dev_dbg(&dev->dev, "Writing DCR2 failed status-0x%x\n", status);
3f542974
PS		 2448 break;
2449 } else
9c134a14 2450 dev_dbg(&dev->dev, "DCR2 Writing success status%d\n", status);
3f542974 2451
880af9db 2452 /* write values in clkstart0x0 and clkmulti 0x20 */
3f542974 2453 Data = 0x0;
880af9db 2454 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2455 CLK_START_VALUE_REGISTER, Data);
2456 if (status < 0) {
9c134a14 2457 dev_dbg(&dev->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
3f542974
PS		 2458 break;
2459 } else
9c134a14 2460 dev_dbg(&dev->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
3f542974
PS		 2461
2462 Data = 0x20;
880af9db
AC		 2463 status = mos7840_set_reg_sync(serial->port[i],
2464 CLK_MULTI_REGISTER, Data);
3f542974 2465 if (status < 0) {
9c134a14 2466 dev_dbg(&dev->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
0de9a702 2467 goto error;
3f542974 2468 } else
9c134a14 2469 dev_dbg(&dev->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
3f542974 2470
880af9db 2471 /* write value 0x0 to scratchpad register */
3f542974 2472 Data = 0x00;
880af9db
AC		 2473 status = mos7840_set_uart_reg(serial->port[i],
2474 SCRATCH_PAD_REGISTER, Data);
3f542974 2475 if (status < 0) {
9c134a14 2476 dev_dbg(&dev->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
3f542974
PS		 2477 break;
2478 } else
9c134a14 2479 dev_dbg(&dev->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
3f542974 2480
880af9db 2481 /* Zero Length flag register */
3f542974 2482 if ((mos7840_port->port_num != 1)
0de9a702 2483 && (serial->num_ports == 2)) {
3f542974
PS		 2484
2485 Data = 0xff;
3f542974 2486 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2487 (__u16) (ZLP_REG1 +
2488 ((__u16)mos7840_port->port_num)), Data);
9c134a14
GKH		 2489 dev_dbg(&dev->dev, "ZLIP offset %x\n",
2490 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
3f542974 2491 if (status < 0) {
9c134a14 2492 dev_dbg(&dev->dev, "Writing ZLP_REG%d failed status-0x%x\n", i + 2, status);
3f542974
PS		 2493 break;
2494 } else
9c134a14 2495 dev_dbg(&dev->dev, "ZLP_REG%d Writing success status%d\n", i + 2, status);
3f542974
PS		 2496 } else {
2497 Data = 0xff;
3f542974 2498 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2499 (__u16) (ZLP_REG1 +
2500 ((__u16)mos7840_port->port_num) - 0x1), Data);
9c134a14
GKH		 2501 dev_dbg(&dev->dev, "ZLIP offset %x\n",
2502 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
3f542974 2503 if (status < 0) {
9c134a14 2504 dev_dbg(&dev->dev, "Writing ZLP_REG%d failed status-0x%x\n", i + 1, status);
3f542974
PS		 2505 break;
2506 } else
9c134a14 2507 dev_dbg(&dev->dev, "ZLP_REG%d Writing success status%d\n", i + 1, status);
3f542974
PS		 2508
2509 }
0de9a702 2510 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974 2511 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
880af9db
AC		 2512 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2513 GFP_KERNEL);
2514 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2515 !mos7840_port->dr) {
0de9a702
ON		 2516 status = -ENOMEM;
2517 goto error;
2518 }
0eafe4de
D		 2519
2520 mos7840_port->has_led = false;
2521
2522 /* Initialize LED timers */
2523 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2524 mos7840_port->has_led = true;
2525
2526 init_timer(&mos7840_port->led_timer1);
2527 mos7840_port->led_timer1.function = mos7840_led_off;
2528 mos7840_port->led_timer1.expires =
2529 jiffies + msecs_to_jiffies(LED_ON_MS);
2530 mos7840_port->led_timer1.data =
2531 (unsigned long)mos7840_port;
2532
2533 init_timer(&mos7840_port->led_timer2);
2534 mos7840_port->led_timer2.function =
2535 mos7840_led_flag_off;
2536 mos7840_port->led_timer2.expires =
2537 jiffies + msecs_to_jiffies(LED_OFF_MS);
2538 mos7840_port->led_timer2.data =
2539 (unsigned long)mos7840_port;
2540
2541 mos7840_port->led_flag = false;
2542
2543 /* Turn off LED */
2544 mos7840_set_led_sync(serial->port[i],
2545 MODEM_CONTROL_REGISTER, 0x0300);
2546 }
3f542974
PS		 2547 }
2548
880af9db 2549 /* Zero Length flag enable */
3f542974 2550 Data = 0x0f;
3f542974
PS		 2551 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2552 if (status < 0) {
9c134a14 2553 dev_dbg(&dev->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
7ced46c3 2554 goto error;
3f542974 2555 } else
9c134a14 2556 dev_dbg(&dev->dev, "ZLP_REG5 Writing success status%d\n", status);
3f542974
PS		 2557
2558 /* setting configuration feature to one */
2559 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1e658489 2560 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, MOS_WDR_TIMEOUT);
3f542974 2561 return 0;
0de9a702
ON		 2562error:
2563 for (/* nothing */; i >= 0; i--) {
2564 mos7840_port = mos7840_get_port_private(serial->port[i]);
2565
2566 kfree(mos7840_port->dr);
2567 kfree(mos7840_port->ctrl_buf);
2568 usb_free_urb(mos7840_port->control_urb);
2569 kfree(mos7840_port);
0de9a702
ON		 2570 }
2571 return status;
3f542974
PS		 2572}
2573
2574/****************************************************************************
f9c99bb8 2575 * mos7840_disconnect
3f542974
PS		 2576 * This function is called whenever the device is removed from the usb bus.
2577 ****************************************************************************/
2578
f9c99bb8 2579static void mos7840_disconnect(struct usb_serial *serial)
3f542974
PS		 2580{
2581 int i;
0de9a702 2582 unsigned long flags;
3f542974 2583 struct moschip_port *mos7840_port;
3f542974 2584
880af9db 2585 /* check for the ports to be closed,close the ports and disconnect */
3f542974
PS		 2586
2587 /* free private structure allocated for serial port *
2588 * stop reads and writes on all ports */
2589
2590 for (i = 0; i < serial->num_ports; ++i) {
2591 mos7840_port = mos7840_get_port_private(serial->port[i]);
37768adf 2592 if (mos7840_port) {
37768adf 2593 usb_kill_urb(mos7840_port->control_urb);
f9c99bb8
AS		 2594 }
2595 }
f9c99bb8
AS		 2596}
2597
2598/****************************************************************************
2599 * mos7840_release
2600 * This function is called when the usb_serial structure is freed.
2601 ****************************************************************************/
2602
2603static void mos7840_release(struct usb_serial *serial)
2604{
2605 int i;
2606 struct moschip_port *mos7840_port;
f9c99bb8 2607
f9c99bb8
AS		 2608 /* check for the ports to be closed,close the ports and disconnect */
2609
2610 /* free private structure allocated for serial port *
2611 * stop reads and writes on all ports */
2612
2613 for (i = 0; i < serial->num_ports; ++i) {
2614 mos7840_port = mos7840_get_port_private(serial->port[i]);
f9c99bb8 2615 if (mos7840_port) {
0eafe4de
D		 2616 if (mos7840_port->has_led) {
2617 /* Turn off LED */
2618 mos7840_set_led_sync(mos7840_port->port,
2619 MODEM_CONTROL_REGISTER, 0x0300);
2620
2621 del_timer_sync(&mos7840_port->led_timer1);
2622 del_timer_sync(&mos7840_port->led_timer2);
2623 }
65a4cdbb 2624 usb_free_urb(mos7840_port->control_urb);
37768adf
TC		 2625 kfree(mos7840_port->ctrl_buf);
2626 kfree(mos7840_port->dr);
2627 kfree(mos7840_port);
2628 }
3f542974 2629 }
3f542974
PS		 2630}
2631
2632static struct usb_serial_driver moschip7840_4port_device = {
2633 .driver = {
2634 .owner = THIS_MODULE,
2635 .name = "mos7840",
2636 },
2637 .description = DRIVER_DESC,
68e24113 2638 .id_table = id_table,
3f542974 2639 .num_ports = 4,
3f542974
PS		 2640 .open = mos7840_open,
2641 .close = mos7840_close,
2642 .write = mos7840_write,
2643 .write_room = mos7840_write_room,
2644 .chars_in_buffer = mos7840_chars_in_buffer,
2645 .throttle = mos7840_throttle,
2646 .unthrottle = mos7840_unthrottle,
2647 .calc_num_ports = mos7840_calc_num_ports,
2648#ifdef MCSSerialProbe
2649 .probe = mos7840_serial_probe,
2650#endif
2651 .ioctl = mos7840_ioctl,
2652 .set_termios = mos7840_set_termios,
2653 .break_ctl = mos7840_break,
2654 .tiocmget = mos7840_tiocmget,
2655 .tiocmset = mos7840_tiocmset,
0bca1b91 2656 .get_icount = mos7840_get_icount,
3f542974 2657 .attach = mos7840_startup,
f9c99bb8
AS		 2658 .disconnect = mos7840_disconnect,
2659 .release = mos7840_release,
3f542974
PS		 2660 .read_bulk_callback = mos7840_bulk_in_callback,
2661 .read_int_callback = mos7840_interrupt_callback,
2662};
2663
4d2a7aff
AS		 2664static struct usb_serial_driver * const serial_drivers[] = {
2665 &moschip7840_4port_device, NULL
2666};
2667
68e24113 2668module_usb_serial_driver(serial_drivers, id_table);
3f542974 2669
3f542974
PS		 2670MODULE_DESCRIPTION(DRIVER_DESC);
2671MODULE_LICENSE("GPL");
Linux kernel - Deliverables
This page took 0.769228 seconds and 5 git commands to generate.