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USB: mos7840: fix race in led handling
[people/arne_f/kernel.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 37
3f542974
PS		 38#define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
39
40/*
41 * 16C50 UART register defines
42 */
43
44#define LCR_BITS_5 0x00 /* 5 bits/char */
45#define LCR_BITS_6 0x01 /* 6 bits/char */
46#define LCR_BITS_7 0x02 /* 7 bits/char */
47#define LCR_BITS_8 0x03 /* 8 bits/char */
48#define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
49
50#define LCR_STOP_1 0x00 /* 1 stop bit */
51#define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
52#define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
53#define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
54
55#define LCR_PAR_NONE 0x00 /* No parity */
56#define LCR_PAR_ODD 0x08 /* Odd parity */
57#define LCR_PAR_EVEN 0x18 /* Even parity */
58#define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
59#define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
60#define LCR_PAR_MASK 0x38 /* Mask for parity field */
61
62#define LCR_SET_BREAK 0x40 /* Set Break condition */
63#define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
64
65#define MCR_DTR 0x01 /* Assert DTR */
66#define MCR_RTS 0x02 /* Assert RTS */
67#define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
68#define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
69#define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
70#define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
71
72#define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
73#define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
74#define MOS7840_MSR_RI 0x40 /* Current state of RI */
75#define MOS7840_MSR_CD 0x80 /* Current state of CD */
76
77/*
78 * Defines used for sending commands to port
79 */
80
1e658489 81#define MOS_WDR_TIMEOUT 5000 /* default urb timeout */
3f542974
PS		 82
83#define MOS_PORT1 0x0200
84#define MOS_PORT2 0x0300
85#define MOS_VENREG 0x0000
86#define MOS_MAX_PORT 0x02
87#define MOS_WRITE 0x0E
88#define MOS_READ 0x0D
89
90/* Requests */
91#define MCS_RD_RTYPE 0xC0
92#define MCS_WR_RTYPE 0x40
93#define MCS_RDREQ 0x0D
94#define MCS_WRREQ 0x0E
95#define MCS_CTRL_TIMEOUT 500
96#define VENDOR_READ_LENGTH (0x01)
97
98#define MAX_NAME_LEN 64
99
880af9db
AC		 100#define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
101#define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
3f542974
PS		 102
103/* For higher baud Rates use TIOCEXBAUD */
104#define TIOCEXBAUD 0x5462
105
106/* vendor id and device id defines */
107
11e1abb4 108/* The native mos7840/7820 component */
3f542974
PS		 109#define USB_VENDOR_ID_MOSCHIP 0x9710
110#define MOSCHIP_DEVICE_ID_7840 0x7840
111#define MOSCHIP_DEVICE_ID_7820 0x7820
0eafe4de 112#define MOSCHIP_DEVICE_ID_7810 0x7810
11e1abb4
DL		 113/* The native component can have its vendor/device id's overridden
114 * in vendor-specific implementations. Such devices can be handled
68e24113 115 * by making a change here, in id_table.
11e1abb4 116 */
870408c8
DL		 117#define USB_VENDOR_ID_BANDB 0x0856
118#define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
119#define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
120#define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
121#define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
122#define BANDB_DEVICE_ID_US9ML2_2 0xAC29
123#define BANDB_DEVICE_ID_US9ML2_4 0xAC30
124#define BANDB_DEVICE_ID_USPTL4_2 0xAC31
125#define BANDB_DEVICE_ID_USPTL4_4 0xAC32
126#define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
127#define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
128#define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
129#define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
130#define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
3f542974 131
9d498bea
RL		 132/* This driver also supports
133 * ATEN UC2324 device using Moschip MCS7840
134 * ATEN UC2322 device using Moschip MCS7820
135 */
e9b8cffa
TC		 136#define USB_VENDOR_ID_ATENINTL 0x0557
137#define ATENINTL_DEVICE_ID_UC2324 0x2011
9d498bea 138#define ATENINTL_DEVICE_ID_UC2322 0x7820
e9b8cffa 139
11e1abb4 140/* Interrupt Routine Defines */
3f542974
PS		 141
142#define SERIAL_IIR_RLS 0x06
143#define SERIAL_IIR_MS 0x00
144
145/*
146 * Emulation of the bit mask on the LINE STATUS REGISTER.
147 */
148#define SERIAL_LSR_DR 0x0001
149#define SERIAL_LSR_OE 0x0002
150#define SERIAL_LSR_PE 0x0004
151#define SERIAL_LSR_FE 0x0008
152#define SERIAL_LSR_BI 0x0010
153
154#define MOS_MSR_DELTA_CTS 0x10
155#define MOS_MSR_DELTA_DSR 0x20
156#define MOS_MSR_DELTA_RI 0x40
157#define MOS_MSR_DELTA_CD 0x80
158
880af9db 159/* Serial Port register Address */
3f542974
PS		 160#define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
161#define FIFO_CONTROL_REGISTER ((__u16)(0x02))
162#define LINE_CONTROL_REGISTER ((__u16)(0x03))
163#define MODEM_CONTROL_REGISTER ((__u16)(0x04))
164#define LINE_STATUS_REGISTER ((__u16)(0x05))
165#define MODEM_STATUS_REGISTER ((__u16)(0x06))
166#define SCRATCH_PAD_REGISTER ((__u16)(0x07))
167#define DIVISOR_LATCH_LSB ((__u16)(0x00))
168#define DIVISOR_LATCH_MSB ((__u16)(0x01))
169
170#define CLK_MULTI_REGISTER ((__u16)(0x02))
171#define CLK_START_VALUE_REGISTER ((__u16)(0x03))
093ea2d3 172#define GPIO_REGISTER ((__u16)(0x07))
3f542974
PS		 173
174#define SERIAL_LCR_DLAB ((__u16)(0x0080))
175
176/*
177 * URB POOL related defines
178 */
179#define NUM_URBS 16 /* URB Count */
180#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
181
0eafe4de
D		 182/* LED on/off milliseconds*/
183#define LED_ON_MS 500
184#define LED_OFF_MS 500
185
d8a083cc
JH		 186enum mos7840_flag {
187 MOS7840_FLAG_CTRL_BUSY,
05cf0dec 188 MOS7840_FLAG_LED_BUSY,
d8a083cc
JH		 189};
190
b9c87663 191static const struct usb_device_id id_table[] = {
3f542974
PS		 192 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
0eafe4de 194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
acf509ae 195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
870408c8 196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
acf509ae 197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
870408c8 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
acf509ae
CB		 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
11e1abb4 203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
870408c8 204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
acf509ae 205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
870408c8 206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
27f1281d 207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
e9b8cffa 208 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
9d498bea 209 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
3f542974
PS		 210 {} /* terminating entry */
211};
68e24113 212MODULE_DEVICE_TABLE(usb, id_table);
3f542974
PS		 213
214/* This structure holds all of the local port information */
215
216struct moschip_port {
217 int port_num; /*Actual port number in the device(1,2,etc) */
218 struct urb *write_urb; /* write URB for this port */
219 struct urb *read_urb; /* read URB for this port */
220 __u8 shadowLCR; /* last LCR value received */
221 __u8 shadowMCR; /* last MCR value received */
222 char open;
0de9a702 223 char open_ports;
3f542974 224 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
3f542974
PS		 225 struct usb_serial_port *port; /* loop back to the owner of this object */
226
880af9db 227 /* Offsets */
3f542974
PS		 228 __u8 SpRegOffset;
229 __u8 ControlRegOffset;
230 __u8 DcrRegOffset;
880af9db 231 /* for processing control URBS in interrupt context */
3f542974 232 struct urb *control_urb;
0de9a702 233 struct usb_ctrlrequest *dr;
3f542974
PS		 234 char *ctrl_buf;
235 int MsrLsr;
236
0de9a702 237 spinlock_t pool_lock;
3f542974 238 struct urb *write_urb_pool[NUM_URBS];
0de9a702 239 char busy[NUM_URBS];
50de36f7 240 bool read_urb_busy;
3f542974 241
0eafe4de
D		 242 /* For device(s) with LED indicator */
243 bool has_led;
0eafe4de
D		 244 struct timer_list led_timer1; /* Timer for LED on */
245 struct timer_list led_timer2; /* Timer for LED off */
05cf0dec
JH		 246 struct urb *led_urb;
247 struct usb_ctrlrequest *led_dr;
d8a083cc
JH		 248
249 unsigned long flags;
0eafe4de 250};
3f542974 251
3f542974
PS		 252/*
253 * mos7840_set_reg_sync
254 * To set the Control register by calling usb_fill_control_urb function
255 * by passing usb_sndctrlpipe function as parameter.
256 */
257
258static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
259 __u16 val)
260{
261 struct usb_device *dev = port->serial->dev;
262 val = val & 0x00ff;
9c134a14 263 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
3f542974
PS		 264
265 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
266 MCS_WR_RTYPE, val, reg, NULL, 0,
267 MOS_WDR_TIMEOUT);
268}
269
270/*
271 * mos7840_get_reg_sync
272 * To set the Uart register by calling usb_fill_control_urb function by
273 * passing usb_rcvctrlpipe function as parameter.
274 */
275
276static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
880af9db 277 __u16 *val)
3f542974
PS		 278{
279 struct usb_device *dev = port->serial->dev;
280 int ret = 0;
9e221a35
JH		 281 u8 *buf;
282
283 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
284 if (!buf)
285 return -ENOMEM;
3f542974
PS		 286
287 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 288 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
3f542974 289 MOS_WDR_TIMEOUT);
9e221a35 290 *val = buf[0];
9c134a14 291 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
9e221a35
JH		 292
293 kfree(buf);
3f542974
PS		 294 return ret;
295}
296
297/*
298 * mos7840_set_uart_reg
299 * To set the Uart register by calling usb_fill_control_urb function by
300 * passing usb_sndctrlpipe function as parameter.
301 */
302
303static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
304 __u16 val)
305{
306
307 struct usb_device *dev = port->serial->dev;
308 val = val & 0x00ff;
880af9db
AC		 309 /* For the UART control registers, the application number need
310 to be Or'ed */
0de9a702 311 if (port->serial->num_ports == 4) {
1143832e 312 val |= ((__u16)port->port_number + 1) << 8;
3f542974 313 } else {
1143832e
GKH		 314 if (port->port_number == 0) {
315 val |= ((__u16)port->port_number + 1) << 8;
3f542974 316 } else {
1143832e 317 val |= ((__u16)port->port_number + 2) << 8;
3f542974
PS		 318 }
319 }
9c134a14 320 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
3f542974
PS		 321 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
322 MCS_WR_RTYPE, val, reg, NULL, 0,
323 MOS_WDR_TIMEOUT);
324
325}
326
327/*
328 * mos7840_get_uart_reg
329 * To set the Control register by calling usb_fill_control_urb function
330 * by passing usb_rcvctrlpipe function as parameter.
331 */
332static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
880af9db 333 __u16 *val)
3f542974
PS		 334{
335 struct usb_device *dev = port->serial->dev;
336 int ret = 0;
337 __u16 Wval;
9e221a35
JH		 338 u8 *buf;
339
340 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
341 if (!buf)
342 return -ENOMEM;
3f542974 343
880af9db 344 /* Wval is same as application number */
0de9a702 345 if (port->serial->num_ports == 4) {
1143832e 346 Wval = ((__u16)port->port_number + 1) << 8;
3f542974 347 } else {
1143832e
GKH		 348 if (port->port_number == 0) {
349 Wval = ((__u16)port->port_number + 1) << 8;
3f542974 350 } else {
1143832e 351 Wval = ((__u16)port->port_number + 2) << 8;
3f542974
PS		 352 }
353 }
9c134a14 354 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
3f542974 355 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 356 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
3f542974 357 MOS_WDR_TIMEOUT);
9e221a35
JH		 358 *val = buf[0];
359
360 kfree(buf);
3f542974
PS		 361 return ret;
362}
363
9c134a14
GKH		 364static void mos7840_dump_serial_port(struct usb_serial_port *port,
365 struct moschip_port *mos7840_port)
3f542974
PS		 366{
367
9c134a14
GKH		 368 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
369 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
370 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
3f542974
PS		 371
372}
373
374/************************************************************************/
375/************************************************************************/
376/* I N T E R F A C E F U N C T I O N S */
377/* I N T E R F A C E F U N C T I O N S */
378/************************************************************************/
379/************************************************************************/
380
381static inline void mos7840_set_port_private(struct usb_serial_port *port,
382 struct moschip_port *data)
383{
384 usb_set_serial_port_data(port, (void *)data);
385}
386
387static inline struct moschip_port *mos7840_get_port_private(struct
388 usb_serial_port
389 *port)
390{
391 return (struct moschip_port *)usb_get_serial_port_data(port);
392}
393
0de9a702 394static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
3f542974
PS		 395{
396 struct moschip_port *mos7840_port;
397 struct async_icount *icount;
398 mos7840_port = port;
3f542974
PS		 399 if (new_msr &
400 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
401 MOS_MSR_DELTA_CD)) {
8c1a07ff 402 icount = &mos7840_port->port->icount;
3f542974
PS		 403
404 /* update input line counters */
c9fac853 405 if (new_msr & MOS_MSR_DELTA_CTS)
3f542974 406 icount->cts++;
c9fac853 407 if (new_msr & MOS_MSR_DELTA_DSR)
3f542974 408 icount->dsr++;
c9fac853 409 if (new_msr & MOS_MSR_DELTA_CD)
3f542974 410 icount->dcd++;
c9fac853 411 if (new_msr & MOS_MSR_DELTA_RI)
3f542974 412 icount->rng++;
e670c6af 413
0c613371 414 wake_up_interruptible(&port->port->port.delta_msr_wait);
3f542974 415 }
3f542974
PS		 416}
417
0de9a702 418static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
3f542974
PS		 419{
420 struct async_icount *icount;
421
3f542974 422 if (new_lsr & SERIAL_LSR_BI) {
880af9db
AC		 423 /*
424 * Parity and Framing errors only count if they
425 * occur exclusive of a break being
426 * received.
427 */
3f542974
PS		 428 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
429 }
430
431 /* update input line counters */
8c1a07ff 432 icount = &port->port->icount;
c9fac853 433 if (new_lsr & SERIAL_LSR_BI)
3f542974 434 icount->brk++;
c9fac853 435 if (new_lsr & SERIAL_LSR_OE)
3f542974 436 icount->overrun++;
c9fac853 437 if (new_lsr & SERIAL_LSR_PE)
3f542974 438 icount->parity++;
c9fac853 439 if (new_lsr & SERIAL_LSR_FE)
3f542974 440 icount->frame++;
3f542974
PS		 441}
442
443/************************************************************************/
444/************************************************************************/
445/* U S B C A L L B A C K F U N C T I O N S */
446/* U S B C A L L B A C K F U N C T I O N S */
447/************************************************************************/
448/************************************************************************/
449
7d12e780 450static void mos7840_control_callback(struct urb *urb)
3f542974
PS		 451{
452 unsigned char *data;
453 struct moschip_port *mos7840_port;
9c134a14 454 struct device *dev = &urb->dev->dev;
3f542974 455 __u8 regval = 0x0;
0643c724 456 int status = urb->status;
3f542974 457
cdc97792 458 mos7840_port = urb->context;
0de9a702 459
0643c724 460 switch (status) {
3f542974
PS		 461 case 0:
462 /* success */
463 break;
464 case -ECONNRESET:
465 case -ENOENT:
466 case -ESHUTDOWN:
467 /* this urb is terminated, clean up */
9c134a14 468 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
d8a083cc 469 goto out;
3f542974 470 default:
9c134a14 471 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
d8a083cc 472 goto out;
3f542974
PS		 473 }
474
9c134a14
GKH		 475 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
476 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
477 mos7840_port->MsrLsr, mos7840_port->port_num);
3f542974
PS		 478 data = urb->transfer_buffer;
479 regval = (__u8) data[0];
9c134a14 480 dev_dbg(dev, "%s data is %x\n", __func__, regval);
3f542974
PS		 481 if (mos7840_port->MsrLsr == 0)
482 mos7840_handle_new_msr(mos7840_port, regval);
483 else if (mos7840_port->MsrLsr == 1)
484 mos7840_handle_new_lsr(mos7840_port, regval);
d8a083cc
JH		 485out:
486 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags);
3f542974
PS		 487}
488
489static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
880af9db 490 __u16 *val)
3f542974
PS		 491{
492 struct usb_device *dev = mcs->port->serial->dev;
0de9a702
ON		 493 struct usb_ctrlrequest *dr = mcs->dr;
494 unsigned char *buffer = mcs->ctrl_buf;
495 int ret;
3f542974 496
d8a083cc
JH		 497 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags))
498 return -EBUSY;
499
3f542974
PS		 500 dr->bRequestType = MCS_RD_RTYPE;
501 dr->bRequest = MCS_RDREQ;
880af9db 502 dr->wValue = cpu_to_le16(Wval); /* 0 */
3f542974
PS		 503 dr->wIndex = cpu_to_le16(reg);
504 dr->wLength = cpu_to_le16(2);
505
506 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
507 (unsigned char *)dr, buffer, 2,
508 mos7840_control_callback, mcs);
509 mcs->control_urb->transfer_buffer_length = 2;
510 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
d8a083cc
JH		 511 if (ret)
512 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags);
513
3f542974
PS		 514 return ret;
515}
516
0eafe4de
D		 517static void mos7840_set_led_callback(struct urb *urb)
518{
519 switch (urb->status) {
520 case 0:
521 /* Success */
522 break;
523 case -ECONNRESET:
524 case -ENOENT:
525 case -ESHUTDOWN:
526 /* This urb is terminated, clean up */
9c134a14
GKH		 527 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
528 __func__, urb->status);
0eafe4de
D		 529 break;
530 default:
9c134a14
GKH		 531 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
532 __func__, urb->status);
0eafe4de
D		 533 }
534}
535
536static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
537 __u16 reg)
538{
539 struct usb_device *dev = mcs->port->serial->dev;
05cf0dec 540 struct usb_ctrlrequest *dr = mcs->led_dr;
0eafe4de
D		 541
542 dr->bRequestType = MCS_WR_RTYPE;
543 dr->bRequest = MCS_WRREQ;
544 dr->wValue = cpu_to_le16(wval);
545 dr->wIndex = cpu_to_le16(reg);
546 dr->wLength = cpu_to_le16(0);
547
05cf0dec 548 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0),
0eafe4de
D		 549 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
550
05cf0dec 551 usb_submit_urb(mcs->led_urb, GFP_ATOMIC);
0eafe4de
D		 552}
553
554static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
555 __u16 val)
556{
557 struct usb_device *dev = port->serial->dev;
558
559 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
560 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
561}
562
563static void mos7840_led_off(unsigned long arg)
564{
565 struct moschip_port *mcs = (struct moschip_port *) arg;
566
567 /* Turn off LED */
568 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
569 mod_timer(&mcs->led_timer2,
570 jiffies + msecs_to_jiffies(LED_OFF_MS));
571}
572
573static void mos7840_led_flag_off(unsigned long arg)
574{
575 struct moschip_port *mcs = (struct moschip_port *) arg;
576
05cf0dec
JH		 577 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags);
578}
579
580static void mos7840_led_activity(struct usb_serial_port *port)
581{
582 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
583
584 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags))
585 return;
586
587 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER);
588 mod_timer(&mos7840_port->led_timer1,
589 jiffies + msecs_to_jiffies(LED_ON_MS));
0eafe4de
D		 590}
591
3f542974
PS		 592/*****************************************************************************
593 * mos7840_interrupt_callback
594 * this is the callback function for when we have received data on the
595 * interrupt endpoint.
596 *****************************************************************************/
597
7d12e780 598static void mos7840_interrupt_callback(struct urb *urb)
3f542974
PS		 599{
600 int result;
601 int length;
602 struct moschip_port *mos7840_port;
603 struct usb_serial *serial;
604 __u16 Data;
605 unsigned char *data;
606 __u8 sp[5], st;
0de9a702
ON		 607 int i, rv = 0;
608 __u16 wval, wreg = 0;
0643c724 609 int status = urb->status;
3f542974 610
0643c724 611 switch (status) {
3f542974
PS		 612 case 0:
613 /* success */
614 break;
615 case -ECONNRESET:
616 case -ENOENT:
617 case -ESHUTDOWN:
618 /* this urb is terminated, clean up */
9c134a14
GKH		 619 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
620 __func__, status);
3f542974
PS		 621 return;
622 default:
9c134a14
GKH		 623 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
624 __func__, status);
3f542974
PS		 625 goto exit;
626 }
627
628 length = urb->actual_length;
629 data = urb->transfer_buffer;
630
cdc97792 631 serial = urb->context;
3f542974
PS		 632
633 /* Moschip get 5 bytes
634 * Byte 1 IIR Port 1 (port.number is 0)
635 * Byte 2 IIR Port 2 (port.number is 1)
636 * Byte 3 IIR Port 3 (port.number is 2)
637 * Byte 4 IIR Port 4 (port.number is 3)
638 * Byte 5 FIFO status for both */
639
640 if (length && length > 5) {
9c134a14 641 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
3f542974
PS		 642 return;
643 }
644
645 sp[0] = (__u8) data[0];
646 sp[1] = (__u8) data[1];
647 sp[2] = (__u8) data[2];
648 sp[3] = (__u8) data[3];
649 st = (__u8) data[4];
650
651 for (i = 0; i < serial->num_ports; i++) {
652 mos7840_port = mos7840_get_port_private(serial->port[i]);
1143832e 653 wval = ((__u16)serial->port[i]->port_number + 1) << 8;
3f542974
PS		 654 if (mos7840_port->open) {
655 if (sp[i] & 0x01) {
9c134a14 656 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
3f542974
PS		 657 } else {
658 switch (sp[i] & 0x0f) {
659 case SERIAL_IIR_RLS:
9c134a14
GKH		 660 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
661 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
3f542974 662 mos7840_port->MsrLsr = 1;
0de9a702 663 wreg = LINE_STATUS_REGISTER;
3f542974
PS		 664 break;
665 case SERIAL_IIR_MS:
9c134a14 666 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
3f542974 667 mos7840_port->MsrLsr = 0;
0de9a702 668 wreg = MODEM_STATUS_REGISTER;
3f542974
PS		 669 break;
670 }
e681b66f 671 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
3f542974
PS		 672 }
673 }
674 }
880af9db
AC		 675 if (!(rv < 0))
676 /* the completion handler for the control urb will resubmit */
0de9a702
ON		 677 return;
678exit:
3f542974
PS		 679 result = usb_submit_urb(urb, GFP_ATOMIC);
680 if (result) {
681 dev_err(&urb->dev->dev,
682 "%s - Error %d submitting interrupt urb\n",
441b62c1 683 __func__, result);
3f542974 684 }
3f542974
PS		 685}
686
687static int mos7840_port_paranoia_check(struct usb_serial_port *port,
688 const char *function)
689{
690 if (!port) {
9c134a14 691 pr_debug("%s - port == NULL\n", function);
3f542974
PS		 692 return -1;
693 }
694 if (!port->serial) {
9c134a14 695 pr_debug("%s - port->serial == NULL\n", function);
3f542974
PS		 696 return -1;
697 }
698
699 return 0;
700}
701
702/* Inline functions to check the sanity of a pointer that is passed to us */
703static int mos7840_serial_paranoia_check(struct usb_serial *serial,
704 const char *function)
705{
706 if (!serial) {
9c134a14 707 pr_debug("%s - serial == NULL\n", function);
3f542974
PS		 708 return -1;
709 }
710 if (!serial->type) {
9c134a14 711 pr_debug("%s - serial->type == NULL!\n", function);
3f542974
PS		 712 return -1;
713 }
714
715 return 0;
716}
717
718static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
719 const char *function)
720{
721 /* if no port was specified, or it fails a paranoia check */
722 if (!port ||
723 mos7840_port_paranoia_check(port, function) ||
724 mos7840_serial_paranoia_check(port->serial, function)) {
880af9db
AC		 725 /* then say that we don't have a valid usb_serial thing,
726 * which will end up genrating -ENODEV return values */
3f542974
PS		 727 return NULL;
728 }
729
730 return port->serial;
731}
732
733/*****************************************************************************
734 * mos7840_bulk_in_callback
735 * this is the callback function for when we have received data on the
736 * bulk in endpoint.
737 *****************************************************************************/
738
7d12e780 739static void mos7840_bulk_in_callback(struct urb *urb)
3f542974 740{
0643c724 741 int retval;
3f542974
PS		 742 unsigned char *data;
743 struct usb_serial *serial;
744 struct usb_serial_port *port;
745 struct moschip_port *mos7840_port;
0643c724 746 int status = urb->status;
3f542974 747
cdc97792 748 mos7840_port = urb->context;
9c134a14 749 if (!mos7840_port)
50de36f7 750 return;
50de36f7
GKH		 751
752 if (status) {
9c134a14 753 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
50de36f7 754 mos7840_port->read_urb_busy = false;
3f542974
PS		 755 return;
756 }
757
9c134a14 758 port = mos7840_port->port;
441b62c1 759 if (mos7840_port_paranoia_check(port, __func__)) {
50de36f7 760 mos7840_port->read_urb_busy = false;
3f542974
PS		 761 return;
762 }
763
441b62c1 764 serial = mos7840_get_usb_serial(port, __func__);
3f542974 765 if (!serial) {
50de36f7 766 mos7840_port->read_urb_busy = false;
3f542974
PS		 767 return;
768 }
769
3f542974 770 data = urb->transfer_buffer;
59d33f2f 771 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
3f542974 772
3f542974 773 if (urb->actual_length) {
05c7cd39 774 struct tty_port *tport = &mos7840_port->port->port;
2e124b4a
JS		 775 tty_insert_flip_string(tport, data, urb->actual_length);
776 tty_flip_buffer_push(tport);
8c1a07ff
JH		 777 port->icount.rx += urb->actual_length;
778 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx);
3f542974
PS		 779 }
780
781 if (!mos7840_port->read_urb) {
9c134a14 782 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
50de36f7 783 mos7840_port->read_urb_busy = false;
3f542974
PS		 784 return;
785 }
786
05cf0dec
JH		 787 if (mos7840_port->has_led)
788 mos7840_led_activity(port);
3f542974 789
50de36f7 790 mos7840_port->read_urb_busy = true;
0643c724 791 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
0de9a702 792
0643c724 793 if (retval) {
9c134a14 794 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
50de36f7 795 mos7840_port->read_urb_busy = false;
3f542974
PS		 796 }
797}
798
799/*****************************************************************************
800 * mos7840_bulk_out_data_callback
880af9db
AC		 801 * this is the callback function for when we have finished sending
802 * serial data on the bulk out endpoint.
3f542974
PS		 803 *****************************************************************************/
804
7d12e780 805static void mos7840_bulk_out_data_callback(struct urb *urb)
3f542974
PS		 806{
807 struct moschip_port *mos7840_port;
9c134a14 808 struct usb_serial_port *port;
0643c724 809 int status = urb->status;
0de9a702
ON		 810 int i;
811
cdc97792 812 mos7840_port = urb->context;
9c134a14 813 port = mos7840_port->port;
0de9a702
ON		 814 spin_lock(&mos7840_port->pool_lock);
815 for (i = 0; i < NUM_URBS; i++) {
816 if (urb == mos7840_port->write_urb_pool[i]) {
817 mos7840_port->busy[i] = 0;
818 break;
819 }
820 }
821 spin_unlock(&mos7840_port->pool_lock);
822
0643c724 823 if (status) {
9c134a14 824 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
3f542974
PS		 825 return;
826 }
827
9c134a14 828 if (mos7840_port_paranoia_check(port, __func__))
3f542974 829 return;
3f542974 830
6aad04f2
JS		 831 if (mos7840_port->open)
832 tty_port_tty_wakeup(&port->port);
3f542974
PS		 833
834}
835
836/************************************************************************/
837/* D R I V E R T T Y I N T E R F A C E F U N C T I O N S */
838/************************************************************************/
3f542974
PS		 839
840/*****************************************************************************
841 * mos7840_open
842 * this function is called by the tty driver when a port is opened
843 * If successful, we return 0
844 * Otherwise we return a negative error number.
845 *****************************************************************************/
846
a509a7e4 847static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
3f542974
PS		 848{
849 int response;
850 int j;
851 struct usb_serial *serial;
852 struct urb *urb;
853 __u16 Data;
854 int status;
855 struct moschip_port *mos7840_port;
0de9a702 856 struct moschip_port *port0;
3f542974 857
9c134a14 858 if (mos7840_port_paranoia_check(port, __func__))
3f542974 859 return -ENODEV;
3f542974 860
3f542974
PS		 861 serial = port->serial;
862
9c134a14 863 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 864 return -ENODEV;
3f542974
PS		 865
866 mos7840_port = mos7840_get_port_private(port);
0de9a702 867 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 868
0de9a702 869 if (mos7840_port == NULL || port0 == NULL)
3f542974
PS		 870 return -ENODEV;
871
872 usb_clear_halt(serial->dev, port->write_urb->pipe);
873 usb_clear_halt(serial->dev, port->read_urb->pipe);
0de9a702 874 port0->open_ports++;
3f542974
PS		 875
876 /* Initialising the write urb pool */
877 for (j = 0; j < NUM_URBS; ++j) {
0de9a702 878 urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974
PS		 879 mos7840_port->write_urb_pool[j] = urb;
880
881 if (urb == NULL) {
194343d9 882 dev_err(&port->dev, "No more urbs???\n");
3f542974
PS		 883 continue;
884 }
885
880af9db
AC		 886 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
887 GFP_KERNEL);
3f542974 888 if (!urb->transfer_buffer) {
0de9a702
ON		 889 usb_free_urb(urb);
890 mos7840_port->write_urb_pool[j] = NULL;
194343d9
GKH		 891 dev_err(&port->dev,
892 "%s-out of memory for urb buffers.\n",
893 __func__);
3f542974
PS		 894 continue;
895 }
896 }
897
898/*****************************************************************************
899 * Initialize MCS7840 -- Write Init values to corresponding Registers
900 *
901 * Register Index
902 * 1 : IER
903 * 2 : FCR
904 * 3 : LCR
905 * 4 : MCR
906 *
907 * 0x08 : SP1/2 Control Reg
908 *****************************************************************************/
909
880af9db 910 /* NEED to check the following Block */
3f542974 911
3f542974
PS		 912 Data = 0x0;
913 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
914 if (status < 0) {
9c134a14 915 dev_dbg(&port->dev, "Reading Spreg failed\n");
5f8a2e68 916 goto err;
3f542974
PS		 917 }
918 Data |= 0x80;
919 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
920 if (status < 0) {
9c134a14 921 dev_dbg(&port->dev, "writing Spreg failed\n");
5f8a2e68 922 goto err;
3f542974
PS		 923 }
924
925 Data &= ~0x80;
926 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
927 if (status < 0) {
9c134a14 928 dev_dbg(&port->dev, "writing Spreg failed\n");
5f8a2e68 929 goto err;
3f542974 930 }
880af9db 931 /* End of block to be checked */
3f542974 932
3f542974 933 Data = 0x0;
880af9db
AC		 934 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
935 &Data);
3f542974 936 if (status < 0) {
9c134a14 937 dev_dbg(&port->dev, "Reading Controlreg failed\n");
5f8a2e68 938 goto err;
3f542974 939 }
880af9db
AC		 940 Data |= 0x08; /* Driver done bit */
941 Data |= 0x20; /* rx_disable */
942 status = mos7840_set_reg_sync(port,
943 mos7840_port->ControlRegOffset, Data);
3f542974 944 if (status < 0) {
9c134a14 945 dev_dbg(&port->dev, "writing Controlreg failed\n");
5f8a2e68 946 goto err;
3f542974 947 }
880af9db
AC		 948 /* do register settings here */
949 /* Set all regs to the device default values. */
950 /***********************************
951 * First Disable all interrupts.
952 ***********************************/
3f542974 953 Data = 0x00;
3f542974
PS		 954 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
955 if (status < 0) {
9c134a14 956 dev_dbg(&port->dev, "disabling interrupts failed\n");
5f8a2e68 957 goto err;
3f542974 958 }
880af9db 959 /* Set FIFO_CONTROL_REGISTER to the default value */
3f542974 960 Data = 0x00;
3f542974
PS		 961 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
962 if (status < 0) {
9c134a14 963 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
5f8a2e68 964 goto err;
3f542974
PS		 965 }
966
967 Data = 0xcf;
3f542974
PS		 968 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
969 if (status < 0) {
9c134a14 970 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
5f8a2e68 971 goto err;
3f542974
PS		 972 }
973
974 Data = 0x03;
3f542974
PS		 975 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
976 mos7840_port->shadowLCR = Data;
977
978 Data = 0x0b;
3f542974
PS		 979 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
980 mos7840_port->shadowMCR = Data;
981
982 Data = 0x00;
3f542974
PS		 983 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
984 mos7840_port->shadowLCR = Data;
985
880af9db 986 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 987 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
988
989 Data = 0x0c;
3f542974
PS		 990 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
991
992 Data = 0x0;
3f542974
PS		 993 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
994
995 Data = 0x00;
3f542974
PS		 996 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
997
998 Data = Data & ~SERIAL_LCR_DLAB;
3f542974
PS		 999 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1000 mos7840_port->shadowLCR = Data;
1001
880af9db 1002 /* clearing Bulkin and Bulkout Fifo */
3f542974 1003 Data = 0x0;
3f542974
PS		 1004 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1005
1006 Data = Data | 0x0c;
3f542974
PS		 1007 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1008
1009 Data = Data & ~0x0c;
3f542974 1010 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
880af9db 1011 /* Finally enable all interrupts */
3f542974 1012 Data = 0x0c;
3f542974
PS		 1013 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1014
880af9db 1015 /* clearing rx_disable */
3f542974 1016 Data = 0x0;
880af9db
AC		 1017 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1018 &Data);
3f542974 1019 Data = Data & ~0x20;
880af9db
AC		 1020 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1021 Data);
3f542974 1022
880af9db 1023 /* rx_negate */
3f542974 1024 Data = 0x0;
880af9db
AC		 1025 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1026 &Data);
3f542974 1027 Data = Data | 0x10;
880af9db
AC		 1028 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1029 Data);
3f542974 1030
880af9db
AC		 1031 /* Check to see if we've set up our endpoint info yet *
1032 * (can't set it up in mos7840_startup as the structures *
1033 * were not set up at that time.) */
0de9a702 1034 if (port0->open_ports == 1) {
3f542974 1035 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1036 /* set up interrupt urb */
3f542974 1037 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1038 serial->dev,
1039 usb_rcvintpipe(serial->dev,
1040 serial->port[0]->interrupt_in_endpointAddress),
1041 serial->port[0]->interrupt_in_buffer,
1042 serial->port[0]->interrupt_in_urb->
1043 transfer_buffer_length,
1044 mos7840_interrupt_callback,
1045 serial,
1046 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1047
1048 /* start interrupt read for mos7840 *
1049 * will continue as long as mos7840 is connected */
1050
1051 response =
1052 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1053 GFP_KERNEL);
1054 if (response) {
194343d9
GKH		 1055 dev_err(&port->dev, "%s - Error %d submitting "
1056 "interrupt urb\n", __func__, response);
3f542974
PS		 1057 }
1058
1059 }
1060
1061 }
1062
1063 /* see if we've set up our endpoint info yet *
1064 * (can't set it up in mos7840_startup as the *
1065 * structures were not set up at that time.) */
1066
1143832e 1067 dev_dbg(&port->dev, "port number is %d\n", port->port_number);
e5b1e206 1068 dev_dbg(&port->dev, "minor number is %d\n", port->minor);
9c134a14
GKH		 1069 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1070 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1071 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1072 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
3f542974
PS		 1073 mos7840_port->read_urb = port->read_urb;
1074
1075 /* set up our bulk in urb */
1143832e 1076 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
093ea2d3
DL		 1077 usb_fill_bulk_urb(mos7840_port->read_urb,
1078 serial->dev,
1079 usb_rcvbulkpipe(serial->dev,
1080 (port->bulk_in_endpointAddress) + 2),
1081 port->bulk_in_buffer,
1082 mos7840_port->read_urb->transfer_buffer_length,
1083 mos7840_bulk_in_callback, mos7840_port);
1084 } else {
1085 usb_fill_bulk_urb(mos7840_port->read_urb,
1086 serial->dev,
1087 usb_rcvbulkpipe(serial->dev,
1088 port->bulk_in_endpointAddress),
1089 port->bulk_in_buffer,
1090 mos7840_port->read_urb->transfer_buffer_length,
1091 mos7840_bulk_in_callback, mos7840_port);
1092 }
3f542974 1093
9c134a14 1094 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
50de36f7 1095 mos7840_port->read_urb_busy = true;
3f542974
PS		 1096 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1097 if (response) {
194343d9
GKH		 1098 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1099 __func__, response);
50de36f7 1100 mos7840_port->read_urb_busy = false;
3f542974
PS		 1101 }
1102
1103 /* initialize our wait queues */
1104 init_waitqueue_head(&mos7840_port->wait_chase);
3f542974 1105
3f542974 1106 /* initialize our port settings */
880af9db
AC		 1107 /* Must set to enable ints! */
1108 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1109 /* send a open port command */
1110 mos7840_port->open = 1;
880af9db 1111 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974 1112
3f542974 1113 return 0;
5f8a2e68
JH		 1114err:
1115 for (j = 0; j < NUM_URBS; ++j) {
1116 urb = mos7840_port->write_urb_pool[j];
1117 if (!urb)
1118 continue;
1119 kfree(urb->transfer_buffer);
1120 usb_free_urb(urb);
1121 }
1122 return status;
3f542974
PS		 1123}
1124
1125/*****************************************************************************
1126 * mos7840_chars_in_buffer
1127 * this function is called by the tty driver when it wants to know how many
1128 * bytes of data we currently have outstanding in the port (data that has
1129 * been written, but hasn't made it out the port yet)
1130 * If successful, we return the number of bytes left to be written in the
1131 * system,
95da310e 1132 * Otherwise we return zero.
3f542974
PS		 1133 *****************************************************************************/
1134
95da310e 1135static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1136{
95da310e 1137 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1138 int i;
1139 int chars = 0;
0de9a702 1140 unsigned long flags;
3f542974
PS		 1141 struct moschip_port *mos7840_port;
1142
9c134a14 1143 if (mos7840_port_paranoia_check(port, __func__))
95da310e 1144 return 0;
3f542974
PS		 1145
1146 mos7840_port = mos7840_get_port_private(port);
3363155b 1147 if (mos7840_port == NULL)
95da310e 1148 return 0;
3f542974 1149
880af9db 1150 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
5c263b92
MF		 1151 for (i = 0; i < NUM_URBS; ++i) {
1152 if (mos7840_port->busy[i]) {
1153 struct urb *urb = mos7840_port->write_urb_pool[i];
1154 chars += urb->transfer_buffer_length;
1155 }
1156 }
880af9db 1157 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
9c134a14 1158 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
0de9a702 1159 return chars;
3f542974
PS		 1160
1161}
1162
3f542974
PS		 1163/*****************************************************************************
1164 * mos7840_close
1165 * this function is called by the tty driver when a port is closed
1166 *****************************************************************************/
1167
335f8514 1168static void mos7840_close(struct usb_serial_port *port)
3f542974
PS		 1169{
1170 struct usb_serial *serial;
1171 struct moschip_port *mos7840_port;
0de9a702 1172 struct moschip_port *port0;
3f542974
PS		 1173 int j;
1174 __u16 Data;
1175
9c134a14 1176 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1177 return;
3f542974 1178
441b62c1 1179 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1180 if (!serial)
3f542974 1181 return;
3f542974
PS		 1182
1183 mos7840_port = mos7840_get_port_private(port);
0de9a702 1184 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1185
0de9a702 1186 if (mos7840_port == NULL || port0 == NULL)
3f542974 1187 return;
3f542974
PS		 1188
1189 for (j = 0; j < NUM_URBS; ++j)
1190 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1191
1192 /* Freeing Write URBs */
1193 for (j = 0; j < NUM_URBS; ++j) {
1194 if (mos7840_port->write_urb_pool[j]) {
1195 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1196 kfree(mos7840_port->write_urb_pool[j]->
1197 transfer_buffer);
1198
1199 usb_free_urb(mos7840_port->write_urb_pool[j]);
1200 }
1201 }
1202
bb3529c6
JH		 1203 usb_kill_urb(mos7840_port->write_urb);
1204 usb_kill_urb(mos7840_port->read_urb);
1205 mos7840_port->read_urb_busy = false;
1206
0de9a702 1207 port0->open_ports--;
1143832e 1208 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports);
0de9a702 1209 if (port0->open_ports == 0) {
3f542974 1210 if (serial->port[0]->interrupt_in_urb) {
9c134a14 1211 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
0de9a702 1212 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1213 }
1214 }
1215
1216 if (mos7840_port->write_urb) {
1217 /* if this urb had a transfer buffer already (old tx) free it */
ae8d4879 1218 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1219 usb_free_urb(mos7840_port->write_urb);
1220 }
1221
1222 Data = 0x0;
1223 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1224
1225 Data = 0x00;
1226 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1227
1228 mos7840_port->open = 0;
3f542974
PS		 1229}
1230
1231/************************************************************************
1232 *
1233 * mos7840_block_until_chase_response
1234 *
1235 * This function will block the close until one of the following:
1236 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1237 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1238 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1239 *
1240 ************************************************************************/
1241
95da310e
AC		 1242static void mos7840_block_until_chase_response(struct tty_struct *tty,
1243 struct moschip_port *mos7840_port)
3f542974 1244{
1e658489 1245 int timeout = msecs_to_jiffies(1000);
3f542974
PS		 1246 int wait = 10;
1247 int count;
1248
1249 while (1) {
95da310e 1250 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1251
1252 /* Check for Buffer status */
880af9db 1253 if (count <= 0)
3f542974 1254 return;
3f542974
PS		 1255
1256 /* Block the thread for a while */
1257 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1258 timeout);
1259 /* No activity.. count down section */
1260 wait--;
1261 if (wait == 0) {
9c134a14 1262 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__);
3f542974
PS		 1263 return;
1264 } else {
dc0d5c1e 1265 /* Reset timeout value back to seconds */
3f542974
PS		 1266 wait = 10;
1267 }
1268 }
1269
1270}
1271
1272/*****************************************************************************
1273 * mos7840_break
1274 * this function sends a break to the port
1275 *****************************************************************************/
95da310e 1276static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1277{
95da310e 1278 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1279 unsigned char data;
1280 struct usb_serial *serial;
1281 struct moschip_port *mos7840_port;
1282
9c134a14 1283 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1284 return;
3f542974 1285
441b62c1 1286 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1287 if (!serial)
3f542974 1288 return;
3f542974
PS		 1289
1290 mos7840_port = mos7840_get_port_private(port);
1291
880af9db 1292 if (mos7840_port == NULL)
3f542974 1293 return;
3f542974 1294
bb3529c6
JH		 1295 /* flush and block until tx is empty */
1296 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1297
95da310e 1298 if (break_state == -1)
3f542974 1299 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1300 else
3f542974 1301 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974 1302
6b447f04 1303 /* FIXME: no locking on shadowLCR anywhere in driver */
3f542974 1304 mos7840_port->shadowLCR = data;
9c134a14 1305 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1306 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1307 mos7840_port->shadowLCR);
3f542974
PS		 1308}
1309
1310/*****************************************************************************
1311 * mos7840_write_room
1312 * this function is called by the tty driver when it wants to know how many
1313 * bytes of data we can accept for a specific port.
1314 * If successful, we return the amount of room that we have for this port
1315 * Otherwise we return a negative error number.
1316 *****************************************************************************/
1317
95da310e 1318static int mos7840_write_room(struct tty_struct *tty)
3f542974 1319{
95da310e 1320 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1321 int i;
1322 int room = 0;
0de9a702 1323 unsigned long flags;
3f542974
PS		 1324 struct moschip_port *mos7840_port;
1325
9c134a14 1326 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1327 return -1;
3f542974
PS		 1328
1329 mos7840_port = mos7840_get_port_private(port);
9c134a14 1330 if (mos7840_port == NULL)
3f542974 1331 return -1;
3f542974 1332
0de9a702 1333 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1334 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1335 if (!mos7840_port->busy[i])
3f542974 1336 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1337 }
0de9a702 1338 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1339
0de9a702 1340 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
9c134a14 1341 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
0de9a702 1342 return room;
3f542974
PS		 1343
1344}
1345
1346/*****************************************************************************
1347 * mos7840_write
1348 * this function is called by the tty driver when data should be written to
1349 * the port.
1350 * If successful, we return the number of bytes written, otherwise we
1351 * return a negative error number.
1352 *****************************************************************************/
1353
95da310e 1354static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1355 const unsigned char *data, int count)
1356{
1357 int status;
1358 int i;
1359 int bytes_sent = 0;
1360 int transfer_size;
0de9a702 1361 unsigned long flags;
3f542974
PS		 1362
1363 struct moschip_port *mos7840_port;
1364 struct usb_serial *serial;
1365 struct urb *urb;
880af9db 1366 /* __u16 Data; */
3f542974
PS		 1367 const unsigned char *current_position = data;
1368 unsigned char *data1;
3f542974
PS		 1369
1370#ifdef NOTMOS7840
1371 Data = 0x00;
3f542974
PS		 1372 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1373 mos7840_port->shadowLCR = Data;
9c134a14
GKH		 1374 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1375 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974 1376
880af9db
AC		 1377 /* Data = 0x03; */
1378 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1379 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1380
880af9db 1381 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1382 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1383
880af9db
AC		 1384 /* Data = 0x0c; */
1385 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1386 Data = 0x00;
3f542974 1387 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
9c134a14 1388 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
3f542974
PS		 1389
1390 Data = 0x0;
3f542974 1391 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
9c134a14 1392 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
3f542974
PS		 1393
1394 Data = Data & ~SERIAL_LCR_DLAB;
9c134a14 1395 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1396 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1397#endif
1398
9c134a14 1399 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1400 return -1;
3f542974
PS		 1401
1402 serial = port->serial;
9c134a14 1403 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 1404 return -1;
3f542974
PS		 1405
1406 mos7840_port = mos7840_get_port_private(port);
9c134a14 1407 if (mos7840_port == NULL)
3f542974 1408 return -1;
3f542974
PS		 1409
1410 /* try to find a free urb in the list */
1411 urb = NULL;
1412
0de9a702 1413 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1414 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1415 if (!mos7840_port->busy[i]) {
1416 mos7840_port->busy[i] = 1;
3f542974 1417 urb = mos7840_port->write_urb_pool[i];
9c134a14 1418 dev_dbg(&port->dev, "URB:%d\n", i);
3f542974
PS		 1419 break;
1420 }
1421 }
0de9a702 1422 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1423
1424 if (urb == NULL) {
9c134a14 1425 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
3f542974
PS		 1426 goto exit;
1427 }
1428
1429 if (urb->transfer_buffer == NULL) {
1430 urb->transfer_buffer =
1431 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1432
1433 if (urb->transfer_buffer == NULL) {
22a416c4 1434 dev_err_console(port, "%s no more kernel memory...\n",
194343d9 1435 __func__);
3f542974
PS		 1436 goto exit;
1437 }
1438 }
1439 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1440
97c4965d 1441 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1442
1443 /* fill urb with data and submit */
1143832e 1444 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
093ea2d3
DL		 1445 usb_fill_bulk_urb(urb,
1446 serial->dev,
1447 usb_sndbulkpipe(serial->dev,
1448 (port->bulk_out_endpointAddress) + 2),
1449 urb->transfer_buffer,
1450 transfer_size,
1451 mos7840_bulk_out_data_callback, mos7840_port);
1452 } else {
1453 usb_fill_bulk_urb(urb,
1454 serial->dev,
1455 usb_sndbulkpipe(serial->dev,
1456 port->bulk_out_endpointAddress),
1457 urb->transfer_buffer,
1458 transfer_size,
1459 mos7840_bulk_out_data_callback, mos7840_port);
1460 }
3f542974
PS		 1461
1462 data1 = urb->transfer_buffer;
9c134a14 1463 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
3f542974 1464
05cf0dec
JH		 1465 if (mos7840_port->has_led)
1466 mos7840_led_activity(port);
0eafe4de 1467
3f542974
PS		 1468 /* send it down the pipe */
1469 status = usb_submit_urb(urb, GFP_ATOMIC);
1470
1471 if (status) {
0de9a702 1472 mos7840_port->busy[i] = 0;
22a416c4 1473 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
194343d9 1474 "with status = %d\n", __func__, status);
3f542974
PS		 1475 bytes_sent = status;
1476 goto exit;
1477 }
1478 bytes_sent = transfer_size;
8c1a07ff
JH		 1479 port->icount.tx += transfer_size;
1480 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx);
95da310e 1481exit:
3f542974
PS		 1482 return bytes_sent;
1483
1484}
1485
1486/*****************************************************************************
1487 * mos7840_throttle
1488 * this function is called by the tty driver when it wants to stop the data
1489 * being read from the port.
1490 *****************************************************************************/
1491
95da310e 1492static void mos7840_throttle(struct tty_struct *tty)
3f542974 1493{
95da310e 1494 struct usb_serial_port *port = tty->driver_data;
3f542974 1495 struct moschip_port *mos7840_port;
3f542974
PS		 1496 int status;
1497
9c134a14 1498 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1499 return;
3f542974
PS		 1500
1501 mos7840_port = mos7840_get_port_private(port);
1502
1503 if (mos7840_port == NULL)
1504 return;
1505
1506 if (!mos7840_port->open) {
9c134a14 1507 dev_dbg(&port->dev, "%s", "port not opened\n");
3f542974
PS		 1508 return;
1509 }
1510
3f542974
PS		 1511 /* if we are implementing XON/XOFF, send the stop character */
1512 if (I_IXOFF(tty)) {
1513 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1514 status = mos7840_write(tty, port, &stop_char, 1);
1515 if (status <= 0)
3f542974 1516 return;
3f542974 1517 }
3f542974 1518 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1519 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1520 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1521 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1522 mos7840_port->shadowMCR);
95da310e 1523 if (status < 0)
3f542974 1524 return;
3f542974 1525 }
3f542974
PS		 1526}
1527
1528/*****************************************************************************
1529 * mos7840_unthrottle
880af9db
AC		 1530 * this function is called by the tty driver when it wants to resume
1531 * the data being read from the port (called after mos7840_throttle is
1532 * called)
3f542974 1533 *****************************************************************************/
95da310e 1534static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1535{
95da310e 1536 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1537 int status;
1538 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1539
9c134a14 1540 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1541 return;
3f542974
PS		 1542
1543 if (mos7840_port == NULL)
1544 return;
1545
1546 if (!mos7840_port->open) {
9c134a14 1547 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1548 return;
1549 }
1550
3f542974
PS		 1551 /* if we are implementing XON/XOFF, send the start character */
1552 if (I_IXOFF(tty)) {
1553 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1554 status = mos7840_write(tty, port, &start_char, 1);
1555 if (status <= 0)
3f542974 1556 return;
3f542974
PS		 1557 }
1558
1559 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1560 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1561 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1562 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1563 mos7840_port->shadowMCR);
95da310e 1564 if (status < 0)
3f542974 1565 return;
3f542974 1566 }
3f542974
PS		 1567}
1568
60b33c13 1569static int mos7840_tiocmget(struct tty_struct *tty)
3f542974 1570{
95da310e 1571 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1572 struct moschip_port *mos7840_port;
1573 unsigned int result;
1574 __u16 msr;
1575 __u16 mcr;
880af9db 1576 int status;
3f542974
PS		 1577 mos7840_port = mos7840_get_port_private(port);
1578
3f542974
PS		 1579 if (mos7840_port == NULL)
1580 return -ENODEV;
1581
1582 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1583 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1584 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1585 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1586 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1587 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1588 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1589 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1590 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1591
9c134a14 1592 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
3f542974
PS		 1593
1594 return result;
1595}
1596
20b9d177 1597static int mos7840_tiocmset(struct tty_struct *tty,
3f542974
PS		 1598 unsigned int set, unsigned int clear)
1599{
95da310e 1600 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1601 struct moschip_port *mos7840_port;
1602 unsigned int mcr;
87521c46 1603 int status;
3f542974 1604
3f542974
PS		 1605 mos7840_port = mos7840_get_port_private(port);
1606
1607 if (mos7840_port == NULL)
1608 return -ENODEV;
1609
e2984494 1610 /* FIXME: What locks the port registers ? */
3f542974
PS		 1611 mcr = mos7840_port->shadowMCR;
1612 if (clear & TIOCM_RTS)
1613 mcr &= ~MCR_RTS;
1614 if (clear & TIOCM_DTR)
1615 mcr &= ~MCR_DTR;
1616 if (clear & TIOCM_LOOP)
1617 mcr &= ~MCR_LOOPBACK;
1618
1619 if (set & TIOCM_RTS)
1620 mcr |= MCR_RTS;
1621 if (set & TIOCM_DTR)
1622 mcr |= MCR_DTR;
1623 if (set & TIOCM_LOOP)
1624 mcr |= MCR_LOOPBACK;
1625
1626 mos7840_port->shadowMCR = mcr;
1627
3f542974
PS		 1628 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1629 if (status < 0) {
9c134a14 1630 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
87521c46 1631 return status;
3f542974
PS		 1632 }
1633
1634 return 0;
1635}
1636
1637/*****************************************************************************
1638 * mos7840_calc_baud_rate_divisor
1639 * this function calculates the proper baud rate divisor for the specified
1640 * baud rate.
1641 *****************************************************************************/
9c134a14
GKH		 1642static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1643 int baudRate, int *divisor,
880af9db 1644 __u16 *clk_sel_val)
3f542974 1645{
9c134a14 1646 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
3f542974
PS		 1647
1648 if (baudRate <= 115200) {
1649 *divisor = 115200 / baudRate;
1650 *clk_sel_val = 0x0;
1651 }
1652 if ((baudRate > 115200) && (baudRate <= 230400)) {
1653 *divisor = 230400 / baudRate;
1654 *clk_sel_val = 0x10;
1655 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1656 *divisor = 403200 / baudRate;
1657 *clk_sel_val = 0x20;
1658 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1659 *divisor = 460800 / baudRate;
1660 *clk_sel_val = 0x30;
1661 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1662 *divisor = 806400 / baudRate;
1663 *clk_sel_val = 0x40;
1664 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1665 *divisor = 921600 / baudRate;
1666 *clk_sel_val = 0x50;
1667 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1668 *divisor = 1572864 / baudRate;
1669 *clk_sel_val = 0x60;
1670 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1671 *divisor = 3145728 / baudRate;
1672 *clk_sel_val = 0x70;
1673 }
1674 return 0;
1675
1676#ifdef NOTMCS7840
1677
1678 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1679 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1680 *divisor = mos7840_divisor_table[i].Divisor;
1681 return 0;
1682 }
1683 }
1684
1685 /* After trying for all the standard baud rates *
1686 * Try calculating the divisor for this baud rate */
1687
1688 if (baudrate > 75 && baudrate < 230400) {
1689 /* get the divisor */
1690 custom = (__u16) (230400L / baudrate);
1691
1692 /* Check for round off */
1693 round1 = (__u16) (2304000L / baudrate);
1694 round = (__u16) (round1 - (custom * 10));
880af9db 1695 if (round > 4)
3f542974 1696 custom++;
3f542974
PS		 1697 *divisor = custom;
1698
9c134a14 1699 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
3f542974
PS		 1700 return 0;
1701 }
1702
9c134a14 1703 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
3f542974
PS		 1704 return -1;
1705#endif
1706}
1707
1708/*****************************************************************************
1709 * mos7840_send_cmd_write_baud_rate
1710 * this function sends the proper command to change the baud rate of the
1711 * specified port.
1712 *****************************************************************************/
1713
1714static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1715 int baudRate)
1716{
1717 int divisor = 0;
1718 int status;
1719 __u16 Data;
1720 unsigned char number;
1721 __u16 clk_sel_val;
1722 struct usb_serial_port *port;
1723
1724 if (mos7840_port == NULL)
1725 return -1;
1726
9c134a14
GKH		 1727 port = mos7840_port->port;
1728 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1729 return -1;
3f542974 1730
9c134a14 1731 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1732 return -1;
3f542974 1733
1143832e 1734 number = mos7840_port->port->port_number;
3f542974 1735
1143832e 1736 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate);
880af9db 1737 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1738 if (baudRate > 115200) {
1739#ifdef HW_flow_control
880af9db
AC		 1740 /* NOTE: need to see the pther register to modify */
1741 /* setting h/w flow control bit to 1 */
3f542974
PS		 1742 Data = 0x2b;
1743 mos7840_port->shadowMCR = Data;
880af9db
AC		 1744 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1745 Data);
3f542974 1746 if (status < 0) {
9c134a14 1747 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1748 return -1;
1749 }
1750#endif
1751
1752 } else {
1753#ifdef HW_flow_control
093ea2d3 1754 /* setting h/w flow control bit to 0 */
3f542974
PS		 1755 Data = 0xb;
1756 mos7840_port->shadowMCR = Data;
880af9db
AC		 1757 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1758 Data);
3f542974 1759 if (status < 0) {
9c134a14 1760 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1761 return -1;
1762 }
1763#endif
1764
1765 }
1766
880af9db 1767 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1768 clk_sel_val = 0x0;
1769 Data = 0x0;
9c134a14 1770 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
3f542974 1771 &clk_sel_val);
880af9db
AC		 1772 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1773 &Data);
3f542974 1774 if (status < 0) {
9c134a14 1775 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
3f542974
PS		 1776 return -1;
1777 }
1778 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1779 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1780 Data);
3f542974 1781 if (status < 0) {
9c134a14 1782 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1783 return -1;
1784 }
1785 /* Calculate the Divisor */
1786
1787 if (status) {
194343d9 1788 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1789 return status;
1790 }
1791 /* Enable access to divisor latch */
1792 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1793 mos7840_port->shadowLCR = Data;
1794 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1795
1796 /* Write the divisor */
1797 Data = (unsigned char)(divisor & 0xff);
9c134a14 1798 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
3f542974
PS		 1799 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1800
1801 Data = (unsigned char)((divisor & 0xff00) >> 8);
9c134a14 1802 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
3f542974
PS		 1803 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1804
1805 /* Disable access to divisor latch */
1806 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1807 mos7840_port->shadowLCR = Data;
1808 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1809
1810 }
3f542974
PS		 1811 return status;
1812}
1813
1814/*****************************************************************************
1815 * mos7840_change_port_settings
1816 * This routine is called to set the UART on the device to match
1817 * the specified new settings.
1818 *****************************************************************************/
1819
95da310e
AC		 1820static void mos7840_change_port_settings(struct tty_struct *tty,
1821 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1822{
3f542974
PS		 1823 int baud;
1824 unsigned cflag;
1825 unsigned iflag;
1826 __u8 lData;
1827 __u8 lParity;
1828 __u8 lStop;
1829 int status;
1830 __u16 Data;
1831 struct usb_serial_port *port;
1832 struct usb_serial *serial;
1833
1834 if (mos7840_port == NULL)
1835 return;
1836
9c134a14 1837 port = mos7840_port->port;
3f542974 1838
9c134a14 1839 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1840 return;
3f542974 1841
9c134a14 1842 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1843 return;
3f542974
PS		 1844
1845 serial = port->serial;
1846
3f542974 1847 if (!mos7840_port->open) {
9c134a14 1848 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1849 return;
1850 }
1851
3f542974
PS		 1852 lData = LCR_BITS_8;
1853 lStop = LCR_STOP_1;
1854 lParity = LCR_PAR_NONE;
1855
adc8d746
AC		 1856 cflag = tty->termios.c_cflag;
1857 iflag = tty->termios.c_iflag;
3f542974
PS		 1858
1859 /* Change the number of bits */
1860 if (cflag & CSIZE) {
1861 switch (cflag & CSIZE) {
1862 case CS5:
1863 lData = LCR_BITS_5;
1864 break;
1865
1866 case CS6:
1867 lData = LCR_BITS_6;
1868 break;
1869
1870 case CS7:
1871 lData = LCR_BITS_7;
1872 break;
1873 default:
1874 case CS8:
1875 lData = LCR_BITS_8;
1876 break;
1877 }
1878 }
1879 /* Change the Parity bit */
1880 if (cflag & PARENB) {
1881 if (cflag & PARODD) {
1882 lParity = LCR_PAR_ODD;
9c134a14 1883 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
3f542974
PS		 1884 } else {
1885 lParity = LCR_PAR_EVEN;
9c134a14 1886 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
3f542974
PS		 1887 }
1888
1889 } else {
9c134a14 1890 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
3f542974
PS		 1891 }
1892
880af9db 1893 if (cflag & CMSPAR)
3f542974 1894 lParity = lParity | 0x20;
3f542974
PS		 1895
1896 /* Change the Stop bit */
1897 if (cflag & CSTOPB) {
1898 lStop = LCR_STOP_2;
9c134a14 1899 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
3f542974
PS		 1900 } else {
1901 lStop = LCR_STOP_1;
9c134a14 1902 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
3f542974
PS		 1903 }
1904
1905 /* Update the LCR with the correct value */
1906 mos7840_port->shadowLCR &=
1907 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1908 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1909
9c134a14
GKH		 1910 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1911 mos7840_port->shadowLCR);
3f542974
PS		 1912 /* Disable Interrupts */
1913 Data = 0x00;
1914 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1915
1916 Data = 0x00;
1917 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1918
1919 Data = 0xcf;
1920 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1921
1922 /* Send the updated LCR value to the mos7840 */
1923 Data = mos7840_port->shadowLCR;
1924
1925 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1926
1927 Data = 0x00b;
1928 mos7840_port->shadowMCR = Data;
1929 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1930 Data = 0x00b;
1931 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1932
1933 /* set up the MCR register and send it to the mos7840 */
1934
1935 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 1936 if (cflag & CBAUD)
3f542974 1937 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 1938
880af9db 1939 if (cflag & CRTSCTS)
3f542974 1940 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 1941 else
3f542974 1942 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 1943
1944 Data = mos7840_port->shadowMCR;
1945 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1946
1947 /* Determine divisor based on baud rate */
1948 baud = tty_get_baud_rate(tty);
1949
1950 if (!baud) {
1951 /* pick a default, any default... */
9c134a14 1952 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
3f542974
PS		 1953 baud = 9600;
1954 }
1955
9c134a14 1956 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
3f542974
PS		 1957 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1958
1959 /* Enable Interrupts */
1960 Data = 0x0c;
1961 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1962
50de36f7 1963 if (mos7840_port->read_urb_busy == false) {
50de36f7 1964 mos7840_port->read_urb_busy = true;
3f542974 1965 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
3f542974 1966 if (status) {
9c134a14 1967 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 1968 status);
50de36f7 1969 mos7840_port->read_urb_busy = false;
3f542974
PS		 1970 }
1971 }
9c134a14
GKH		 1972 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1973 mos7840_port->shadowLCR);
3f542974
PS		 1974}
1975
1976/*****************************************************************************
1977 * mos7840_set_termios
1978 * this function is called by the tty driver when it wants to change
1979 * the termios structure
1980 *****************************************************************************/
1981
95da310e
AC		 1982static void mos7840_set_termios(struct tty_struct *tty,
1983 struct usb_serial_port *port,
606d099c 1984 struct ktermios *old_termios)
3f542974
PS		 1985{
1986 int status;
1987 unsigned int cflag;
1988 struct usb_serial *serial;
1989 struct moschip_port *mos7840_port;
3363155b 1990
9c134a14 1991 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1992 return;
3f542974
PS		 1993
1994 serial = port->serial;
1995
9c134a14 1996 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 1997 return;
3f542974
PS		 1998
1999 mos7840_port = mos7840_get_port_private(port);
2000
2001 if (mos7840_port == NULL)
2002 return;
2003
3f542974 2004 if (!mos7840_port->open) {
9c134a14 2005 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 2006 return;
2007 }
2008
9c134a14 2009 dev_dbg(&port->dev, "%s", "setting termios - \n");
3f542974 2010
adc8d746 2011 cflag = tty->termios.c_cflag;
3f542974 2012
9c134a14 2013 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
d9a80746 2014 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
9c134a14
GKH		 2015 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2016 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
3f542974
PS		 2017
2018 /* change the port settings to the new ones specified */
2019
95da310e 2020 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2021
2022 if (!mos7840_port->read_urb) {
9c134a14 2023 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
3f542974
PS		 2024 return;
2025 }
2026
50de36f7 2027 if (mos7840_port->read_urb_busy == false) {
50de36f7 2028 mos7840_port->read_urb_busy = true;
3f542974
PS		 2029 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2030 if (status) {
9c134a14 2031 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 2032 status);
50de36f7 2033 mos7840_port->read_urb_busy = false;
3f542974
PS		 2034 }
2035 }
3f542974
PS		 2036}
2037
2038/*****************************************************************************
2039 * mos7840_get_lsr_info - get line status register info
2040 *
2041 * Purpose: Let user call ioctl() to get info when the UART physically
2042 * is emptied. On bus types like RS485, the transmitter must
2043 * release the bus after transmitting. This must be done when
2044 * the transmit shift register is empty, not be done when the
2045 * transmit holding register is empty. This functionality
2046 * allows an RS485 driver to be written in user space.
2047 *****************************************************************************/
2048
95da310e 2049static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2050 unsigned int __user *value)
3f542974
PS		 2051{
2052 int count;
2053 unsigned int result = 0;
2054
95da310e 2055 count = mos7840_chars_in_buffer(tty);
9c134a14 2056 if (count == 0)
3f542974 2057 result = TIOCSER_TEMT;
3f542974
PS		 2058
2059 if (copy_to_user(value, &result, sizeof(int)))
2060 return -EFAULT;
2061 return 0;
2062}
2063
3f542974
PS		 2064/*****************************************************************************
2065 * mos7840_get_serial_info
2066 * function to get information about serial port
2067 *****************************************************************************/
2068
2069static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2070 struct serial_struct __user *retinfo)
3f542974
PS		 2071{
2072 struct serial_struct tmp;
2073
2074 if (mos7840_port == NULL)
2075 return -1;
2076
2077 if (!retinfo)
2078 return -EFAULT;
2079
2080 memset(&tmp, 0, sizeof(tmp));
2081
2082 tmp.type = PORT_16550A;
e5b1e206 2083 tmp.line = mos7840_port->port->minor;
1143832e 2084 tmp.port = mos7840_port->port->port_number;
3f542974
PS		 2085 tmp.irq = 0;
2086 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2087 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2088 tmp.baud_base = 9600;
2089 tmp.close_delay = 5 * HZ;
2090 tmp.closing_wait = 30 * HZ;
2091
2092 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2093 return -EFAULT;
2094 return 0;
2095}
2096
2097/*****************************************************************************
2098 * SerialIoctl
2099 * this function handles any ioctl calls to the driver
2100 *****************************************************************************/
2101
00a0d0d6 2102static int mos7840_ioctl(struct tty_struct *tty,
3f542974
PS		 2103 unsigned int cmd, unsigned long arg)
2104{
95da310e 2105 struct usb_serial_port *port = tty->driver_data;
97c4965d 2106 void __user *argp = (void __user *)arg;
3f542974 2107 struct moschip_port *mos7840_port;
3f542974 2108
9c134a14 2109 if (mos7840_port_paranoia_check(port, __func__))
3f542974 2110 return -1;
3f542974
PS		 2111
2112 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2113
2114 if (mos7840_port == NULL)
2115 return -1;
2116
9c134a14 2117 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
3f542974
PS		 2118
2119 switch (cmd) {
2120 /* return number of bytes available */
2121
3f542974 2122 case TIOCSERGETLSR:
9c134a14 2123 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
95da310e 2124 return mos7840_get_lsr_info(tty, argp);
3f542974 2125
3f542974 2126 case TIOCGSERIAL:
9c134a14 2127 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
97c4965d 2128 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2129
2130 case TIOCSSERIAL:
9c134a14 2131 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
3f542974 2132 break;
3f542974
PS		 2133 default:
2134 break;
2135 }
3f542974
PS		 2136 return -ENOIOCTLCMD;
2137}
2138
0eafe4de
D		 2139static int mos7810_check(struct usb_serial *serial)
2140{
2141 int i, pass_count = 0;
15ee89c3 2142 u8 *buf;
0eafe4de
D		 2143 __u16 data = 0, mcr_data = 0;
2144 __u16 test_pattern = 0x55AA;
15ee89c3
JH		 2145 int res;
2146
2147 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2148 if (!buf)
2149 return 0; /* failed to identify 7810 */
0eafe4de
D		 2150
2151 /* Store MCR setting */
15ee89c3 2152 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
0eafe4de 2153 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
15ee89c3
JH		 2154 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2155 if (res == VENDOR_READ_LENGTH)
2156 mcr_data = *buf;
0eafe4de
D		 2157
2158 for (i = 0; i < 16; i++) {
2159 /* Send the 1-bit test pattern out to MCS7810 test pin */
2160 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2161 MCS_WRREQ, MCS_WR_RTYPE,
2162 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2163 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2164
2165 /* Read the test pattern back */
15ee89c3
JH		 2166 res = usb_control_msg(serial->dev,
2167 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ,
2168 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2169 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2170 if (res == VENDOR_READ_LENGTH)
2171 data = *buf;
0eafe4de
D		 2172
2173 /* If this is a MCS7810 device, both test patterns must match */
2174 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2175 break;
2176
2177 pass_count++;
2178 }
2179
2180 /* Restore MCR setting */
2181 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2182 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2183 0, MOS_WDR_TIMEOUT);
2184
15ee89c3
JH		 2185 kfree(buf);
2186
0eafe4de
D		 2187 if (pass_count == 16)
2188 return 1;
2189
2190 return 0;
2191}
2192
40c24f28
JH		 2193static int mos7840_probe(struct usb_serial *serial,
2194 const struct usb_device_id *id)
3f542974 2195{
40c24f28 2196 u16 product = serial->dev->descriptor.idProduct;
15ee89c3 2197 u8 *buf;
40c24f28
JH		 2198 int device_type;
2199
2200 if (product == MOSCHIP_DEVICE_ID_7810 ||
2201 product == MOSCHIP_DEVICE_ID_7820) {
2202 device_type = product;
2203 goto out;
2204 }
093ea2d3 2205
15ee89c3 2206 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
40c24f28
JH		 2207 if (!buf)
2208 return -ENOMEM;
2209
2210 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
15ee89c3
JH		 2211 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2212 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
093ea2d3 2213
40c24f28
JH		 2214 /* For a MCS7840 device GPIO0 must be set to 1 */
2215 if (buf[0] & 0x01)
2216 device_type = MOSCHIP_DEVICE_ID_7840;
2217 else if (mos7810_check(serial))
2218 device_type = MOSCHIP_DEVICE_ID_7810;
2219 else
2220 device_type = MOSCHIP_DEVICE_ID_7820;
2221
2222 kfree(buf);
2223out:
2224 usb_set_serial_data(serial, (void *)device_type);
2225
2226 return 0;
2227}
2228
2229static int mos7840_calc_num_ports(struct usb_serial *serial)
2230{
2231 int device_type = (int)usb_get_serial_data(serial);
2232 int mos7840_num_ports;
093ea2d3 2233
0eafe4de 2234 mos7840_num_ports = (device_type >> 4) & 0x000F;
0eafe4de 2235
3f542974
PS		 2236 return mos7840_num_ports;
2237}
2238
80c00750 2239static int mos7840_port_probe(struct usb_serial_port *port)
3f542974 2240{
80c00750 2241 struct usb_serial *serial = port->serial;
40c24f28 2242 int device_type = (int)usb_get_serial_data(serial);
3f542974 2243 struct moschip_port *mos7840_port;
80c00750
JH		 2244 int status;
2245 int pnum;
3f542974 2246 __u16 Data;
3f542974 2247
3f542974
PS		 2248 /* we set up the pointers to the endpoints in the mos7840_open *
2249 * function, as the structures aren't created yet. */
2250
1143832e 2251 pnum = port->port_number;
80c00750 2252
ae685eff
JH		 2253 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2254 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2255 if (mos7840_port == NULL) {
2256 dev_err(&port->dev, "%s - Out of memory\n", __func__);
2257 return -ENOMEM;
2258 }
3f542974 2259
ae685eff
JH		 2260 /* Initialize all port interrupt end point to port 0 int
2261 * endpoint. Our device has only one interrupt end point
2262 * common to all port */
2263
2264 mos7840_port->port = port;
2265 mos7840_set_port_private(port, mos7840_port);
2266 spin_lock_init(&mos7840_port->pool_lock);
2267
2268 /* minor is not initialised until later by
2269 * usb-serial.c:get_free_serial() and cannot therefore be used
2270 * to index device instances */
2271 mos7840_port->port_num = pnum + 1;
e5b1e206 2272 dev_dbg(&port->dev, "port->minor = %d\n", port->minor);
ae685eff 2273 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
ae685eff
JH		 2274
2275 if (mos7840_port->port_num == 1) {
2276 mos7840_port->SpRegOffset = 0x0;
2277 mos7840_port->ControlRegOffset = 0x1;
2278 mos7840_port->DcrRegOffset = 0x4;
2279 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2280 mos7840_port->SpRegOffset = 0x8;
2281 mos7840_port->ControlRegOffset = 0x9;
2282 mos7840_port->DcrRegOffset = 0x16;
2283 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2284 mos7840_port->SpRegOffset = 0xa;
2285 mos7840_port->ControlRegOffset = 0xb;
2286 mos7840_port->DcrRegOffset = 0x19;
2287 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2288 mos7840_port->SpRegOffset = 0xa;
2289 mos7840_port->ControlRegOffset = 0xb;
2290 mos7840_port->DcrRegOffset = 0x19;
2291 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2292 mos7840_port->SpRegOffset = 0xc;
2293 mos7840_port->ControlRegOffset = 0xd;
2294 mos7840_port->DcrRegOffset = 0x1c;
2295 }
2296 mos7840_dump_serial_port(port, mos7840_port);
2297 mos7840_set_port_private(port, mos7840_port);
2298
2299 /* enable rx_disable bit in control register */
2300 status = mos7840_get_reg_sync(port,
2301 mos7840_port->ControlRegOffset, &Data);
2302 if (status < 0) {
2303 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2304 goto out;
2305 } else
2306 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2307 Data |= 0x08; /* setting driver done bit */
2308 Data |= 0x04; /* sp1_bit to have cts change reflect in
2309 modem status reg */
2310
2311 /* Data |= 0x20; //rx_disable bit */
2312 status = mos7840_set_reg_sync(port,
2313 mos7840_port->ControlRegOffset, Data);
2314 if (status < 0) {
2315 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2316 goto out;
2317 } else
2318 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2319
2320 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2321 and 0x24 in DCR3 */
2322 Data = 0x01;
2323 status = mos7840_set_reg_sync(port,
2324 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2325 if (status < 0) {
2326 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2327 goto out;
2328 } else
2329 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
3f542974 2330
ae685eff
JH		 2331 Data = 0x05;
2332 status = mos7840_set_reg_sync(port,
2333 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2334 if (status < 0) {
2335 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2336 goto out;
2337 } else
2338 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
3f542974 2339
ae685eff
JH		 2340 Data = 0x24;
2341 status = mos7840_set_reg_sync(port,
2342 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2343 if (status < 0) {
2344 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2345 goto out;
2346 } else
2347 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
3f542974 2348
ae685eff
JH		 2349 /* write values in clkstart0x0 and clkmulti 0x20 */
2350 Data = 0x0;
2351 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2352 if (status < 0) {
2353 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2354 goto out;
2355 } else
2356 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
3f542974 2357
ae685eff
JH		 2358 Data = 0x20;
2359 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2360 if (status < 0) {
2361 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2362 goto error;
2363 } else
2364 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
3f542974 2365
ae685eff
JH		 2366 /* write value 0x0 to scratchpad register */
2367 Data = 0x00;
2368 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2369 if (status < 0) {
2370 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2371 goto out;
2372 } else
2373 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2374
2375 /* Zero Length flag register */
2376 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2377 Data = 0xff;
80c00750 2378 status = mos7840_set_reg_sync(port,
ae685eff
JH		 2379 (__u16) (ZLP_REG1 +
2380 ((__u16)mos7840_port->port_num)), Data);
2381 dev_dbg(&port->dev, "ZLIP offset %x\n",
2382 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
3f542974 2383 if (status < 0) {
ae685eff
JH		 2384 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2385 goto out;
3f542974 2386 } else
ae685eff
JH		 2387 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2388 } else {
2389 Data = 0xff;
80c00750 2390 status = mos7840_set_reg_sync(port,
ae685eff
JH		 2391 (__u16) (ZLP_REG1 +
2392 ((__u16)mos7840_port->port_num) - 0x1), Data);
2393 dev_dbg(&port->dev, "ZLIP offset %x\n",
2394 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
3f542974 2395 if (status < 0) {
ae685eff
JH		 2396 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2397 goto out;
3f542974 2398 } else
ae685eff 2399 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
3f542974 2400
ae685eff
JH		 2401 }
2402 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2403 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2404 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2405 GFP_KERNEL);
2406 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2407 !mos7840_port->dr) {
2408 status = -ENOMEM;
2409 goto error;
2410 }
0eafe4de 2411
ae685eff 2412 mos7840_port->has_led = false;
0eafe4de 2413
ae685eff
JH		 2414 /* Initialize LED timers */
2415 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2416 mos7840_port->has_led = true;
0eafe4de 2417
05cf0dec
JH		 2418 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL);
2419 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr),
2420 GFP_KERNEL);
2421 if (!mos7840_port->led_urb || !mos7840_port->led_dr) {
2422 status = -ENOMEM;
2423 goto error;
2424 }
2425
ae685eff
JH		 2426 init_timer(&mos7840_port->led_timer1);
2427 mos7840_port->led_timer1.function = mos7840_led_off;
2428 mos7840_port->led_timer1.expires =
2429 jiffies + msecs_to_jiffies(LED_ON_MS);
2430 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
0eafe4de 2431
ae685eff
JH		 2432 init_timer(&mos7840_port->led_timer2);
2433 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2434 mos7840_port->led_timer2.expires =
2435 jiffies + msecs_to_jiffies(LED_OFF_MS);
2436 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
0eafe4de 2437
ae685eff
JH		 2438 /* Turn off LED */
2439 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2440 }
2441out:
80c00750
JH		 2442 if (pnum == serial->num_ports - 1) {
2443 /* Zero Length flag enable */
2444 Data = 0x0f;
2445 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2446 if (status < 0) {
2447 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2448 goto error;
2449 } else
2450 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2451
2452 /* setting configuration feature to one */
2453 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2454 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2455 MOS_WDR_TIMEOUT);
2456 }
3f542974 2457 return 0;
0de9a702 2458error:
05cf0dec
JH		 2459 kfree(mos7840_port->led_dr);
2460 usb_free_urb(mos7840_port->led_urb);
80c00750
JH		 2461 kfree(mos7840_port->dr);
2462 kfree(mos7840_port->ctrl_buf);
2463 usb_free_urb(mos7840_port->control_urb);
2464 kfree(mos7840_port);
0de9a702 2465
0de9a702 2466 return status;
3f542974
PS		 2467}
2468
80c00750 2469static int mos7840_port_remove(struct usb_serial_port *port)
3f542974 2470{
3f542974 2471 struct moschip_port *mos7840_port;
3f542974 2472
80c00750 2473 mos7840_port = mos7840_get_port_private(port);
3f542974 2474
80c00750
JH		 2475 if (mos7840_port->has_led) {
2476 /* Turn off LED */
2477 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
3f542974 2478
80c00750
JH		 2479 del_timer_sync(&mos7840_port->led_timer1);
2480 del_timer_sync(&mos7840_port->led_timer2);
05cf0dec
JH		 2481
2482 usb_kill_urb(mos7840_port->led_urb);
2483 usb_free_urb(mos7840_port->led_urb);
2484 kfree(mos7840_port->led_dr);
f9c99bb8 2485 }
80c00750
JH		 2486 usb_kill_urb(mos7840_port->control_urb);
2487 usb_free_urb(mos7840_port->control_urb);
2488 kfree(mos7840_port->ctrl_buf);
2489 kfree(mos7840_port->dr);
2490 kfree(mos7840_port);
f9c99bb8 2491
80c00750 2492 return 0;
3f542974
PS		 2493}
2494
2495static struct usb_serial_driver moschip7840_4port_device = {
2496 .driver = {
2497 .owner = THIS_MODULE,
2498 .name = "mos7840",
2499 },
2500 .description = DRIVER_DESC,
68e24113 2501 .id_table = id_table,
3f542974 2502 .num_ports = 4,
3f542974
PS		 2503 .open = mos7840_open,
2504 .close = mos7840_close,
2505 .write = mos7840_write,
2506 .write_room = mos7840_write_room,
2507 .chars_in_buffer = mos7840_chars_in_buffer,
2508 .throttle = mos7840_throttle,
2509 .unthrottle = mos7840_unthrottle,
2510 .calc_num_ports = mos7840_calc_num_ports,
40c24f28 2511 .probe = mos7840_probe,
3f542974
PS		 2512 .ioctl = mos7840_ioctl,
2513 .set_termios = mos7840_set_termios,
2514 .break_ctl = mos7840_break,
2515 .tiocmget = mos7840_tiocmget,
2516 .tiocmset = mos7840_tiocmset,
0c613371 2517 .tiocmiwait = usb_serial_generic_tiocmiwait,
8c1a07ff 2518 .get_icount = usb_serial_generic_get_icount,
80c00750
JH		 2519 .port_probe = mos7840_port_probe,
2520 .port_remove = mos7840_port_remove,
3f542974
PS		 2521 .read_bulk_callback = mos7840_bulk_in_callback,
2522 .read_int_callback = mos7840_interrupt_callback,
2523};
2524
4d2a7aff
AS		 2525static struct usb_serial_driver * const serial_drivers[] = {
2526 &moschip7840_4port_device, NULL
2527};
2528
68e24113 2529module_usb_serial_driver(serial_drivers, id_table);
3f542974 2530
3f542974
PS		 2531MODULE_DESCRIPTION(DRIVER_DESC);
2532MODULE_LICENSE("GPL");
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