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USB: spcp8x5: correct handling of CS5 setting
[mirror_ubuntu-artful-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 189};
3f542974 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
PS		 224 struct usb_serial_port *port; /* loop back to the owner of this object */
225
880af9db 226 /* Offsets */
3f542974
PS		 227 __u8 SpRegOffset;
228 __u8 ControlRegOffset;
229 __u8 DcrRegOffset;
880af9db 230 /* for processing control URBS in interrupt context */
3f542974 231 struct urb *control_urb;
0de9a702 232 struct usb_ctrlrequest *dr;
3f542974
PS		 233 char *ctrl_buf;
234 int MsrLsr;
235
0de9a702 236 spinlock_t pool_lock;
3f542974 237 struct urb *write_urb_pool[NUM_URBS];
0de9a702 238 char busy[NUM_URBS];
50de36f7 239 bool read_urb_busy;
3f542974 240
0eafe4de
D		 241 /* For device(s) with LED indicator */
242 bool has_led;
0eafe4de
D		 243 struct timer_list led_timer1; /* Timer for LED on */
244 struct timer_list led_timer2; /* Timer for LED off */
05cf0dec
JH		 245 struct urb *led_urb;
246 struct usb_ctrlrequest *led_dr;
d8a083cc
JH		 247
248 unsigned long flags;
0eafe4de 249};
3f542974 250
3f542974
PS		 251/*
252 * mos7840_set_reg_sync
253 * To set the Control register by calling usb_fill_control_urb function
254 * by passing usb_sndctrlpipe function as parameter.
255 */
256
257static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
258 __u16 val)
259{
260 struct usb_device *dev = port->serial->dev;
261 val = val & 0x00ff;
9c134a14 262 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
3f542974
PS		 263
264 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
265 MCS_WR_RTYPE, val, reg, NULL, 0,
266 MOS_WDR_TIMEOUT);
267}
268
269/*
270 * mos7840_get_reg_sync
271 * To set the Uart register by calling usb_fill_control_urb function by
272 * passing usb_rcvctrlpipe function as parameter.
273 */
274
275static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
880af9db 276 __u16 *val)
3f542974
PS		 277{
278 struct usb_device *dev = port->serial->dev;
279 int ret = 0;
9e221a35
JH		 280 u8 *buf;
281
282 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
283 if (!buf)
284 return -ENOMEM;
3f542974
PS		 285
286 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 287 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
3f542974 288 MOS_WDR_TIMEOUT);
9e221a35 289 *val = buf[0];
9c134a14 290 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
9e221a35
JH		 291
292 kfree(buf);
3f542974
PS		 293 return ret;
294}
295
296/*
297 * mos7840_set_uart_reg
298 * To set the Uart register by calling usb_fill_control_urb function by
299 * passing usb_sndctrlpipe function as parameter.
300 */
301
302static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
303 __u16 val)
304{
305
306 struct usb_device *dev = port->serial->dev;
307 val = val & 0x00ff;
880af9db
AC		 308 /* For the UART control registers, the application number need
309 to be Or'ed */
0de9a702 310 if (port->serial->num_ports == 4) {
1143832e 311 val |= ((__u16)port->port_number + 1) << 8;
3f542974 312 } else {
1143832e
GKH		 313 if (port->port_number == 0) {
314 val |= ((__u16)port->port_number + 1) << 8;
3f542974 315 } else {
1143832e 316 val |= ((__u16)port->port_number + 2) << 8;
3f542974
PS		 317 }
318 }
9c134a14 319 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
3f542974
PS		 320 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
321 MCS_WR_RTYPE, val, reg, NULL, 0,
322 MOS_WDR_TIMEOUT);
323
324}
325
326/*
327 * mos7840_get_uart_reg
328 * To set the Control register by calling usb_fill_control_urb function
329 * by passing usb_rcvctrlpipe function as parameter.
330 */
331static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
880af9db 332 __u16 *val)
3f542974
PS		 333{
334 struct usb_device *dev = port->serial->dev;
335 int ret = 0;
336 __u16 Wval;
9e221a35
JH		 337 u8 *buf;
338
339 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
340 if (!buf)
341 return -ENOMEM;
3f542974 342
880af9db 343 /* Wval is same as application number */
0de9a702 344 if (port->serial->num_ports == 4) {
1143832e 345 Wval = ((__u16)port->port_number + 1) << 8;
3f542974 346 } else {
1143832e
GKH		 347 if (port->port_number == 0) {
348 Wval = ((__u16)port->port_number + 1) << 8;
3f542974 349 } else {
1143832e 350 Wval = ((__u16)port->port_number + 2) << 8;
3f542974
PS		 351 }
352 }
9c134a14 353 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
3f542974 354 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 355 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
3f542974 356 MOS_WDR_TIMEOUT);
9e221a35
JH		 357 *val = buf[0];
358
359 kfree(buf);
3f542974
PS		 360 return ret;
361}
362
9c134a14
GKH		 363static void mos7840_dump_serial_port(struct usb_serial_port *port,
364 struct moschip_port *mos7840_port)
3f542974
PS		 365{
366
9c134a14
GKH		 367 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
368 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
369 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
3f542974
PS		 370
371}
372
373/************************************************************************/
374/************************************************************************/
375/* I N T E R F A C E F U N C T I O N S */
376/* I N T E R F A C E F U N C T I O N S */
377/************************************************************************/
378/************************************************************************/
379
380static inline void mos7840_set_port_private(struct usb_serial_port *port,
381 struct moschip_port *data)
382{
383 usb_set_serial_port_data(port, (void *)data);
384}
385
386static inline struct moschip_port *mos7840_get_port_private(struct
387 usb_serial_port
388 *port)
389{
390 return (struct moschip_port *)usb_get_serial_port_data(port);
391}
392
0de9a702 393static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
3f542974
PS		 394{
395 struct moschip_port *mos7840_port;
396 struct async_icount *icount;
397 mos7840_port = port;
3f542974
PS		 398 if (new_msr &
399 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
400 MOS_MSR_DELTA_CD)) {
8c1a07ff 401 icount = &mos7840_port->port->icount;
3f542974
PS		 402
403 /* update input line counters */
c9fac853 404 if (new_msr & MOS_MSR_DELTA_CTS)
3f542974 405 icount->cts++;
c9fac853 406 if (new_msr & MOS_MSR_DELTA_DSR)
3f542974 407 icount->dsr++;
c9fac853 408 if (new_msr & MOS_MSR_DELTA_CD)
3f542974 409 icount->dcd++;
c9fac853 410 if (new_msr & MOS_MSR_DELTA_RI)
3f542974 411 icount->rng++;
e670c6af 412
0c613371 413 wake_up_interruptible(&port->port->port.delta_msr_wait);
3f542974 414 }
3f542974
PS		 415}
416
0de9a702 417static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
3f542974
PS		 418{
419 struct async_icount *icount;
420
3f542974 421 if (new_lsr & SERIAL_LSR_BI) {
880af9db
AC		 422 /*
423 * Parity and Framing errors only count if they
424 * occur exclusive of a break being
425 * received.
426 */
3f542974
PS		 427 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
428 }
429
430 /* update input line counters */
8c1a07ff 431 icount = &port->port->icount;
c9fac853 432 if (new_lsr & SERIAL_LSR_BI)
3f542974 433 icount->brk++;
c9fac853 434 if (new_lsr & SERIAL_LSR_OE)
3f542974 435 icount->overrun++;
c9fac853 436 if (new_lsr & SERIAL_LSR_PE)
3f542974 437 icount->parity++;
c9fac853 438 if (new_lsr & SERIAL_LSR_FE)
3f542974 439 icount->frame++;
3f542974
PS		 440}
441
442/************************************************************************/
443/************************************************************************/
444/* U S B C A L L B A C K F U N C T I O N S */
445/* U S B C A L L B A C K F U N C T I O N S */
446/************************************************************************/
447/************************************************************************/
448
7d12e780 449static void mos7840_control_callback(struct urb *urb)
3f542974
PS		 450{
451 unsigned char *data;
452 struct moschip_port *mos7840_port;
9c134a14 453 struct device *dev = &urb->dev->dev;
3f542974 454 __u8 regval = 0x0;
0643c724 455 int status = urb->status;
3f542974 456
cdc97792 457 mos7840_port = urb->context;
0de9a702 458
0643c724 459 switch (status) {
3f542974
PS		 460 case 0:
461 /* success */
462 break;
463 case -ECONNRESET:
464 case -ENOENT:
465 case -ESHUTDOWN:
466 /* this urb is terminated, clean up */
9c134a14 467 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
d8a083cc 468 goto out;
3f542974 469 default:
9c134a14 470 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
d8a083cc 471 goto out;
3f542974
PS		 472 }
473
9c134a14
GKH		 474 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
475 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
476 mos7840_port->MsrLsr, mos7840_port->port_num);
3f542974
PS		 477 data = urb->transfer_buffer;
478 regval = (__u8) data[0];
9c134a14 479 dev_dbg(dev, "%s data is %x\n", __func__, regval);
3f542974
PS		 480 if (mos7840_port->MsrLsr == 0)
481 mos7840_handle_new_msr(mos7840_port, regval);
482 else if (mos7840_port->MsrLsr == 1)
483 mos7840_handle_new_lsr(mos7840_port, regval);
d8a083cc
JH		 484out:
485 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags);
3f542974
PS		 486}
487
488static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
880af9db 489 __u16 *val)
3f542974
PS		 490{
491 struct usb_device *dev = mcs->port->serial->dev;
0de9a702
ON		 492 struct usb_ctrlrequest *dr = mcs->dr;
493 unsigned char *buffer = mcs->ctrl_buf;
494 int ret;
3f542974 495
d8a083cc
JH		 496 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags))
497 return -EBUSY;
498
3f542974
PS		 499 dr->bRequestType = MCS_RD_RTYPE;
500 dr->bRequest = MCS_RDREQ;
880af9db 501 dr->wValue = cpu_to_le16(Wval); /* 0 */
3f542974
PS		 502 dr->wIndex = cpu_to_le16(reg);
503 dr->wLength = cpu_to_le16(2);
504
505 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
506 (unsigned char *)dr, buffer, 2,
507 mos7840_control_callback, mcs);
508 mcs->control_urb->transfer_buffer_length = 2;
509 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
d8a083cc
JH		 510 if (ret)
511 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags);
512
3f542974
PS		 513 return ret;
514}
515
0eafe4de
D		 516static void mos7840_set_led_callback(struct urb *urb)
517{
518 switch (urb->status) {
519 case 0:
520 /* Success */
521 break;
522 case -ECONNRESET:
523 case -ENOENT:
524 case -ESHUTDOWN:
525 /* This urb is terminated, clean up */
9c134a14
GKH		 526 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
527 __func__, urb->status);
0eafe4de
D		 528 break;
529 default:
9c134a14
GKH		 530 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
531 __func__, urb->status);
0eafe4de
D		 532 }
533}
534
535static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
536 __u16 reg)
537{
538 struct usb_device *dev = mcs->port->serial->dev;
05cf0dec 539 struct usb_ctrlrequest *dr = mcs->led_dr;
0eafe4de
D		 540
541 dr->bRequestType = MCS_WR_RTYPE;
542 dr->bRequest = MCS_WRREQ;
543 dr->wValue = cpu_to_le16(wval);
544 dr->wIndex = cpu_to_le16(reg);
545 dr->wLength = cpu_to_le16(0);
546
05cf0dec 547 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0),
0eafe4de
D		 548 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
549
05cf0dec 550 usb_submit_urb(mcs->led_urb, GFP_ATOMIC);
0eafe4de
D		 551}
552
553static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
554 __u16 val)
555{
556 struct usb_device *dev = port->serial->dev;
557
558 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
559 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
560}
561
562static void mos7840_led_off(unsigned long arg)
563{
564 struct moschip_port *mcs = (struct moschip_port *) arg;
565
566 /* Turn off LED */
567 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
568 mod_timer(&mcs->led_timer2,
569 jiffies + msecs_to_jiffies(LED_OFF_MS));
570}
571
572static void mos7840_led_flag_off(unsigned long arg)
573{
574 struct moschip_port *mcs = (struct moschip_port *) arg;
575
05cf0dec
JH		 576 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags);
577}
578
579static void mos7840_led_activity(struct usb_serial_port *port)
580{
581 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
582
583 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags))
584 return;
585
586 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER);
587 mod_timer(&mos7840_port->led_timer1,
588 jiffies + msecs_to_jiffies(LED_ON_MS));
0eafe4de
D		 589}
590
3f542974
PS		 591/*****************************************************************************
592 * mos7840_interrupt_callback
593 * this is the callback function for when we have received data on the
594 * interrupt endpoint.
595 *****************************************************************************/
596
7d12e780 597static void mos7840_interrupt_callback(struct urb *urb)
3f542974
PS		 598{
599 int result;
600 int length;
601 struct moschip_port *mos7840_port;
602 struct usb_serial *serial;
603 __u16 Data;
604 unsigned char *data;
605 __u8 sp[5], st;
0de9a702
ON		 606 int i, rv = 0;
607 __u16 wval, wreg = 0;
0643c724 608 int status = urb->status;
3f542974 609
0643c724 610 switch (status) {
3f542974
PS		 611 case 0:
612 /* success */
613 break;
614 case -ECONNRESET:
615 case -ENOENT:
616 case -ESHUTDOWN:
617 /* this urb is terminated, clean up */
9c134a14
GKH		 618 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
619 __func__, status);
3f542974
PS		 620 return;
621 default:
9c134a14
GKH		 622 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
623 __func__, status);
3f542974
PS		 624 goto exit;
625 }
626
627 length = urb->actual_length;
628 data = urb->transfer_buffer;
629
cdc97792 630 serial = urb->context;
3f542974
PS		 631
632 /* Moschip get 5 bytes
633 * Byte 1 IIR Port 1 (port.number is 0)
634 * Byte 2 IIR Port 2 (port.number is 1)
635 * Byte 3 IIR Port 3 (port.number is 2)
636 * Byte 4 IIR Port 4 (port.number is 3)
637 * Byte 5 FIFO status for both */
638
639 if (length && length > 5) {
9c134a14 640 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
3f542974
PS		 641 return;
642 }
643
644 sp[0] = (__u8) data[0];
645 sp[1] = (__u8) data[1];
646 sp[2] = (__u8) data[2];
647 sp[3] = (__u8) data[3];
648 st = (__u8) data[4];
649
650 for (i = 0; i < serial->num_ports; i++) {
651 mos7840_port = mos7840_get_port_private(serial->port[i]);
1143832e 652 wval = ((__u16)serial->port[i]->port_number + 1) << 8;
3f542974
PS		 653 if (mos7840_port->open) {
654 if (sp[i] & 0x01) {
9c134a14 655 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
3f542974
PS		 656 } else {
657 switch (sp[i] & 0x0f) {
658 case SERIAL_IIR_RLS:
9c134a14
GKH		 659 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
660 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
3f542974 661 mos7840_port->MsrLsr = 1;
0de9a702 662 wreg = LINE_STATUS_REGISTER;
3f542974
PS		 663 break;
664 case SERIAL_IIR_MS:
9c134a14 665 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
3f542974 666 mos7840_port->MsrLsr = 0;
0de9a702 667 wreg = MODEM_STATUS_REGISTER;
3f542974
PS		 668 break;
669 }
e681b66f 670 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
3f542974
PS		 671 }
672 }
673 }
880af9db
AC		 674 if (!(rv < 0))
675 /* the completion handler for the control urb will resubmit */
0de9a702
ON		 676 return;
677exit:
3f542974
PS		 678 result = usb_submit_urb(urb, GFP_ATOMIC);
679 if (result) {
680 dev_err(&urb->dev->dev,
681 "%s - Error %d submitting interrupt urb\n",
441b62c1 682 __func__, result);
3f542974 683 }
3f542974
PS		 684}
685
686static int mos7840_port_paranoia_check(struct usb_serial_port *port,
687 const char *function)
688{
689 if (!port) {
9c134a14 690 pr_debug("%s - port == NULL\n", function);
3f542974
PS		 691 return -1;
692 }
693 if (!port->serial) {
9c134a14 694 pr_debug("%s - port->serial == NULL\n", function);
3f542974
PS		 695 return -1;
696 }
697
698 return 0;
699}
700
701/* Inline functions to check the sanity of a pointer that is passed to us */
702static int mos7840_serial_paranoia_check(struct usb_serial *serial,
703 const char *function)
704{
705 if (!serial) {
9c134a14 706 pr_debug("%s - serial == NULL\n", function);
3f542974
PS		 707 return -1;
708 }
709 if (!serial->type) {
9c134a14 710 pr_debug("%s - serial->type == NULL!\n", function);
3f542974
PS		 711 return -1;
712 }
713
714 return 0;
715}
716
717static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
718 const char *function)
719{
720 /* if no port was specified, or it fails a paranoia check */
721 if (!port ||
722 mos7840_port_paranoia_check(port, function) ||
723 mos7840_serial_paranoia_check(port->serial, function)) {
880af9db
AC		 724 /* then say that we don't have a valid usb_serial thing,
725 * which will end up genrating -ENODEV return values */
3f542974
PS		 726 return NULL;
727 }
728
729 return port->serial;
730}
731
732/*****************************************************************************
733 * mos7840_bulk_in_callback
734 * this is the callback function for when we have received data on the
735 * bulk in endpoint.
736 *****************************************************************************/
737
7d12e780 738static void mos7840_bulk_in_callback(struct urb *urb)
3f542974 739{
0643c724 740 int retval;
3f542974
PS		 741 unsigned char *data;
742 struct usb_serial *serial;
743 struct usb_serial_port *port;
744 struct moschip_port *mos7840_port;
0643c724 745 int status = urb->status;
3f542974 746
cdc97792 747 mos7840_port = urb->context;
9c134a14 748 if (!mos7840_port)
50de36f7 749 return;
50de36f7
GKH		 750
751 if (status) {
9c134a14 752 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
50de36f7 753 mos7840_port->read_urb_busy = false;
3f542974
PS		 754 return;
755 }
756
9c134a14 757 port = mos7840_port->port;
441b62c1 758 if (mos7840_port_paranoia_check(port, __func__)) {
50de36f7 759 mos7840_port->read_urb_busy = false;
3f542974
PS		 760 return;
761 }
762
441b62c1 763 serial = mos7840_get_usb_serial(port, __func__);
3f542974 764 if (!serial) {
50de36f7 765 mos7840_port->read_urb_busy = false;
3f542974
PS		 766 return;
767 }
768
3f542974 769 data = urb->transfer_buffer;
59d33f2f 770 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
3f542974 771
3f542974 772 if (urb->actual_length) {
05c7cd39 773 struct tty_port *tport = &mos7840_port->port->port;
2e124b4a
JS		 774 tty_insert_flip_string(tport, data, urb->actual_length);
775 tty_flip_buffer_push(tport);
8c1a07ff
JH		 776 port->icount.rx += urb->actual_length;
777 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx);
3f542974
PS		 778 }
779
780 if (!mos7840_port->read_urb) {
9c134a14 781 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
50de36f7 782 mos7840_port->read_urb_busy = false;
3f542974
PS		 783 return;
784 }
785
05cf0dec
JH		 786 if (mos7840_port->has_led)
787 mos7840_led_activity(port);
3f542974 788
50de36f7 789 mos7840_port->read_urb_busy = true;
0643c724 790 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
0de9a702 791
0643c724 792 if (retval) {
9c134a14 793 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
50de36f7 794 mos7840_port->read_urb_busy = false;
3f542974
PS		 795 }
796}
797
798/*****************************************************************************
799 * mos7840_bulk_out_data_callback
880af9db
AC		 800 * this is the callback function for when we have finished sending
801 * serial data on the bulk out endpoint.
3f542974
PS		 802 *****************************************************************************/
803
7d12e780 804static void mos7840_bulk_out_data_callback(struct urb *urb)
3f542974
PS		 805{
806 struct moschip_port *mos7840_port;
9c134a14 807 struct usb_serial_port *port;
0643c724 808 int status = urb->status;
0de9a702
ON		 809 int i;
810
cdc97792 811 mos7840_port = urb->context;
9c134a14 812 port = mos7840_port->port;
0de9a702
ON		 813 spin_lock(&mos7840_port->pool_lock);
814 for (i = 0; i < NUM_URBS; i++) {
815 if (urb == mos7840_port->write_urb_pool[i]) {
816 mos7840_port->busy[i] = 0;
817 break;
818 }
819 }
820 spin_unlock(&mos7840_port->pool_lock);
821
0643c724 822 if (status) {
9c134a14 823 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
3f542974
PS		 824 return;
825 }
826
9c134a14 827 if (mos7840_port_paranoia_check(port, __func__))
3f542974 828 return;
3f542974 829
6aad04f2
JS		 830 if (mos7840_port->open)
831 tty_port_tty_wakeup(&port->port);
3f542974
PS		 832
833}
834
835/************************************************************************/
836/* 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 */
837/************************************************************************/
3f542974
PS		 838
839/*****************************************************************************
840 * mos7840_open
841 * this function is called by the tty driver when a port is opened
842 * If successful, we return 0
843 * Otherwise we return a negative error number.
844 *****************************************************************************/
845
a509a7e4 846static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
3f542974
PS		 847{
848 int response;
849 int j;
850 struct usb_serial *serial;
851 struct urb *urb;
852 __u16 Data;
853 int status;
854 struct moschip_port *mos7840_port;
0de9a702 855 struct moschip_port *port0;
3f542974 856
9c134a14 857 if (mos7840_port_paranoia_check(port, __func__))
3f542974 858 return -ENODEV;
3f542974 859
3f542974
PS		 860 serial = port->serial;
861
9c134a14 862 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 863 return -ENODEV;
3f542974
PS		 864
865 mos7840_port = mos7840_get_port_private(port);
0de9a702 866 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 867
0de9a702 868 if (mos7840_port == NULL || port0 == NULL)
3f542974
PS		 869 return -ENODEV;
870
871 usb_clear_halt(serial->dev, port->write_urb->pipe);
872 usb_clear_halt(serial->dev, port->read_urb->pipe);
0de9a702 873 port0->open_ports++;
3f542974
PS		 874
875 /* Initialising the write urb pool */
876 for (j = 0; j < NUM_URBS; ++j) {
0de9a702 877 urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974
PS		 878 mos7840_port->write_urb_pool[j] = urb;
879
880 if (urb == NULL) {
194343d9 881 dev_err(&port->dev, "No more urbs???\n");
3f542974
PS		 882 continue;
883 }
884
880af9db
AC		 885 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
886 GFP_KERNEL);
3f542974 887 if (!urb->transfer_buffer) {
0de9a702
ON		 888 usb_free_urb(urb);
889 mos7840_port->write_urb_pool[j] = NULL;
194343d9
GKH		 890 dev_err(&port->dev,
891 "%s-out of memory for urb buffers.\n",
892 __func__);
3f542974
PS		 893 continue;
894 }
895 }
896
897/*****************************************************************************
898 * Initialize MCS7840 -- Write Init values to corresponding Registers
899 *
900 * Register Index
901 * 1 : IER
902 * 2 : FCR
903 * 3 : LCR
904 * 4 : MCR
905 *
906 * 0x08 : SP1/2 Control Reg
907 *****************************************************************************/
908
880af9db 909 /* NEED to check the following Block */
3f542974 910
3f542974
PS		 911 Data = 0x0;
912 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
913 if (status < 0) {
9c134a14 914 dev_dbg(&port->dev, "Reading Spreg failed\n");
5f8a2e68 915 goto err;
3f542974
PS		 916 }
917 Data |= 0x80;
918 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
919 if (status < 0) {
9c134a14 920 dev_dbg(&port->dev, "writing Spreg failed\n");
5f8a2e68 921 goto err;
3f542974
PS		 922 }
923
924 Data &= ~0x80;
925 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
926 if (status < 0) {
9c134a14 927 dev_dbg(&port->dev, "writing Spreg failed\n");
5f8a2e68 928 goto err;
3f542974 929 }
880af9db 930 /* End of block to be checked */
3f542974 931
3f542974 932 Data = 0x0;
880af9db
AC		 933 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
934 &Data);
3f542974 935 if (status < 0) {
9c134a14 936 dev_dbg(&port->dev, "Reading Controlreg failed\n");
5f8a2e68 937 goto err;
3f542974 938 }
880af9db
AC		 939 Data |= 0x08; /* Driver done bit */
940 Data |= 0x20; /* rx_disable */
941 status = mos7840_set_reg_sync(port,
942 mos7840_port->ControlRegOffset, Data);
3f542974 943 if (status < 0) {
9c134a14 944 dev_dbg(&port->dev, "writing Controlreg failed\n");
5f8a2e68 945 goto err;
3f542974 946 }
880af9db
AC		 947 /* do register settings here */
948 /* Set all regs to the device default values. */
949 /***********************************
950 * First Disable all interrupts.
951 ***********************************/
3f542974 952 Data = 0x00;
3f542974
PS		 953 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
954 if (status < 0) {
9c134a14 955 dev_dbg(&port->dev, "disabling interrupts failed\n");
5f8a2e68 956 goto err;
3f542974 957 }
880af9db 958 /* Set FIFO_CONTROL_REGISTER to the default value */
3f542974 959 Data = 0x00;
3f542974
PS		 960 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
961 if (status < 0) {
9c134a14 962 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
5f8a2e68 963 goto err;
3f542974
PS		 964 }
965
966 Data = 0xcf;
3f542974
PS		 967 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
968 if (status < 0) {
9c134a14 969 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
5f8a2e68 970 goto err;
3f542974
PS		 971 }
972
973 Data = 0x03;
3f542974
PS		 974 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
975 mos7840_port->shadowLCR = Data;
976
977 Data = 0x0b;
3f542974
PS		 978 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
979 mos7840_port->shadowMCR = Data;
980
981 Data = 0x00;
3f542974
PS		 982 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
983 mos7840_port->shadowLCR = Data;
984
880af9db 985 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 986 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
987
988 Data = 0x0c;
3f542974
PS		 989 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
990
991 Data = 0x0;
3f542974
PS		 992 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
993
994 Data = 0x00;
3f542974
PS		 995 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
996
997 Data = Data & ~SERIAL_LCR_DLAB;
3f542974
PS		 998 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
999 mos7840_port->shadowLCR = Data;
1000
880af9db 1001 /* clearing Bulkin and Bulkout Fifo */
3f542974 1002 Data = 0x0;
3f542974
PS		 1003 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1004
1005 Data = Data | 0x0c;
3f542974
PS		 1006 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1007
1008 Data = Data & ~0x0c;
3f542974 1009 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
880af9db 1010 /* Finally enable all interrupts */
3f542974 1011 Data = 0x0c;
3f542974
PS		 1012 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1013
880af9db 1014 /* clearing rx_disable */
3f542974 1015 Data = 0x0;
880af9db
AC		 1016 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1017 &Data);
3f542974 1018 Data = Data & ~0x20;
880af9db
AC		 1019 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1020 Data);
3f542974 1021
880af9db 1022 /* rx_negate */
3f542974 1023 Data = 0x0;
880af9db
AC		 1024 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1025 &Data);
3f542974 1026 Data = Data | 0x10;
880af9db
AC		 1027 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1028 Data);
3f542974 1029
880af9db
AC		 1030 /* Check to see if we've set up our endpoint info yet *
1031 * (can't set it up in mos7840_startup as the structures *
1032 * were not set up at that time.) */
0de9a702 1033 if (port0->open_ports == 1) {
3f542974 1034 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1035 /* set up interrupt urb */
3f542974 1036 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1037 serial->dev,
1038 usb_rcvintpipe(serial->dev,
1039 serial->port[0]->interrupt_in_endpointAddress),
1040 serial->port[0]->interrupt_in_buffer,
1041 serial->port[0]->interrupt_in_urb->
1042 transfer_buffer_length,
1043 mos7840_interrupt_callback,
1044 serial,
1045 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1046
1047 /* start interrupt read for mos7840 *
1048 * will continue as long as mos7840 is connected */
1049
1050 response =
1051 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1052 GFP_KERNEL);
1053 if (response) {
194343d9
GKH		 1054 dev_err(&port->dev, "%s - Error %d submitting "
1055 "interrupt urb\n", __func__, response);
3f542974
PS		 1056 }
1057
1058 }
1059
1060 }
1061
1062 /* see if we've set up our endpoint info yet *
1063 * (can't set it up in mos7840_startup as the *
1064 * structures were not set up at that time.) */
1065
1143832e 1066 dev_dbg(&port->dev, "port number is %d\n", port->port_number);
e5b1e206 1067 dev_dbg(&port->dev, "minor number is %d\n", port->minor);
9c134a14
GKH		 1068 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1069 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1070 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1071 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
3f542974
PS		 1072 mos7840_port->read_urb = port->read_urb;
1073
1074 /* set up our bulk in urb */
1143832e 1075 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
093ea2d3
DL		 1076 usb_fill_bulk_urb(mos7840_port->read_urb,
1077 serial->dev,
1078 usb_rcvbulkpipe(serial->dev,
1079 (port->bulk_in_endpointAddress) + 2),
1080 port->bulk_in_buffer,
1081 mos7840_port->read_urb->transfer_buffer_length,
1082 mos7840_bulk_in_callback, mos7840_port);
1083 } else {
1084 usb_fill_bulk_urb(mos7840_port->read_urb,
1085 serial->dev,
1086 usb_rcvbulkpipe(serial->dev,
1087 port->bulk_in_endpointAddress),
1088 port->bulk_in_buffer,
1089 mos7840_port->read_urb->transfer_buffer_length,
1090 mos7840_bulk_in_callback, mos7840_port);
1091 }
3f542974 1092
9c134a14 1093 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
50de36f7 1094 mos7840_port->read_urb_busy = true;
3f542974
PS		 1095 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1096 if (response) {
194343d9
GKH		 1097 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1098 __func__, response);
50de36f7 1099 mos7840_port->read_urb_busy = false;
3f542974
PS		 1100 }
1101
3f542974 1102 /* initialize our port settings */
880af9db
AC		 1103 /* Must set to enable ints! */
1104 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1105 /* send a open port command */
1106 mos7840_port->open = 1;
880af9db 1107 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974 1108
3f542974 1109 return 0;
5f8a2e68
JH		 1110err:
1111 for (j = 0; j < NUM_URBS; ++j) {
1112 urb = mos7840_port->write_urb_pool[j];
1113 if (!urb)
1114 continue;
1115 kfree(urb->transfer_buffer);
1116 usb_free_urb(urb);
1117 }
1118 return status;
3f542974
PS		 1119}
1120
1121/*****************************************************************************
1122 * mos7840_chars_in_buffer
1123 * this function is called by the tty driver when it wants to know how many
1124 * bytes of data we currently have outstanding in the port (data that has
1125 * been written, but hasn't made it out the port yet)
1126 * If successful, we return the number of bytes left to be written in the
1127 * system,
95da310e 1128 * Otherwise we return zero.
3f542974
PS		 1129 *****************************************************************************/
1130
95da310e 1131static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1132{
95da310e 1133 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1134 int i;
1135 int chars = 0;
0de9a702 1136 unsigned long flags;
3f542974
PS		 1137 struct moschip_port *mos7840_port;
1138
9c134a14 1139 if (mos7840_port_paranoia_check(port, __func__))
95da310e 1140 return 0;
3f542974
PS		 1141
1142 mos7840_port = mos7840_get_port_private(port);
3363155b 1143 if (mos7840_port == NULL)
95da310e 1144 return 0;
3f542974 1145
880af9db 1146 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
5c263b92
MF		 1147 for (i = 0; i < NUM_URBS; ++i) {
1148 if (mos7840_port->busy[i]) {
1149 struct urb *urb = mos7840_port->write_urb_pool[i];
1150 chars += urb->transfer_buffer_length;
1151 }
1152 }
880af9db 1153 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
9c134a14 1154 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
0de9a702 1155 return chars;
3f542974
PS		 1156
1157}
1158
3f542974
PS		 1159/*****************************************************************************
1160 * mos7840_close
1161 * this function is called by the tty driver when a port is closed
1162 *****************************************************************************/
1163
335f8514 1164static void mos7840_close(struct usb_serial_port *port)
3f542974
PS		 1165{
1166 struct usb_serial *serial;
1167 struct moschip_port *mos7840_port;
0de9a702 1168 struct moschip_port *port0;
3f542974
PS		 1169 int j;
1170 __u16 Data;
1171
9c134a14 1172 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1173 return;
3f542974 1174
441b62c1 1175 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1176 if (!serial)
3f542974 1177 return;
3f542974
PS		 1178
1179 mos7840_port = mos7840_get_port_private(port);
0de9a702 1180 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1181
0de9a702 1182 if (mos7840_port == NULL || port0 == NULL)
3f542974 1183 return;
3f542974
PS		 1184
1185 for (j = 0; j < NUM_URBS; ++j)
1186 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1187
1188 /* Freeing Write URBs */
1189 for (j = 0; j < NUM_URBS; ++j) {
1190 if (mos7840_port->write_urb_pool[j]) {
1191 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1192 kfree(mos7840_port->write_urb_pool[j]->
1193 transfer_buffer);
1194
1195 usb_free_urb(mos7840_port->write_urb_pool[j]);
1196 }
1197 }
1198
bb3529c6
JH		 1199 usb_kill_urb(mos7840_port->write_urb);
1200 usb_kill_urb(mos7840_port->read_urb);
1201 mos7840_port->read_urb_busy = false;
1202
0de9a702 1203 port0->open_ports--;
1143832e 1204 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports);
0de9a702 1205 if (port0->open_ports == 0) {
3f542974 1206 if (serial->port[0]->interrupt_in_urb) {
9c134a14 1207 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
0de9a702 1208 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1209 }
1210 }
1211
1212 if (mos7840_port->write_urb) {
1213 /* if this urb had a transfer buffer already (old tx) free it */
ae8d4879 1214 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1215 usb_free_urb(mos7840_port->write_urb);
1216 }
1217
1218 Data = 0x0;
1219 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1220
1221 Data = 0x00;
1222 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1223
1224 mos7840_port->open = 0;
3f542974
PS		 1225}
1226
3f542974
PS		 1227/*****************************************************************************
1228 * mos7840_break
1229 * this function sends a break to the port
1230 *****************************************************************************/
95da310e 1231static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1232{
95da310e 1233 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1234 unsigned char data;
1235 struct usb_serial *serial;
1236 struct moschip_port *mos7840_port;
1237
9c134a14 1238 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1239 return;
3f542974 1240
441b62c1 1241 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1242 if (!serial)
3f542974 1243 return;
3f542974
PS		 1244
1245 mos7840_port = mos7840_get_port_private(port);
1246
880af9db 1247 if (mos7840_port == NULL)
3f542974 1248 return;
3f542974 1249
95da310e 1250 if (break_state == -1)
3f542974 1251 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1252 else
3f542974 1253 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974 1254
6b447f04 1255 /* FIXME: no locking on shadowLCR anywhere in driver */
3f542974 1256 mos7840_port->shadowLCR = data;
9c134a14 1257 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1258 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1259 mos7840_port->shadowLCR);
3f542974
PS		 1260}
1261
1262/*****************************************************************************
1263 * mos7840_write_room
1264 * this function is called by the tty driver when it wants to know how many
1265 * bytes of data we can accept for a specific port.
1266 * If successful, we return the amount of room that we have for this port
1267 * Otherwise we return a negative error number.
1268 *****************************************************************************/
1269
95da310e 1270static int mos7840_write_room(struct tty_struct *tty)
3f542974 1271{
95da310e 1272 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1273 int i;
1274 int room = 0;
0de9a702 1275 unsigned long flags;
3f542974
PS		 1276 struct moschip_port *mos7840_port;
1277
9c134a14 1278 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1279 return -1;
3f542974
PS		 1280
1281 mos7840_port = mos7840_get_port_private(port);
9c134a14 1282 if (mos7840_port == NULL)
3f542974 1283 return -1;
3f542974 1284
0de9a702 1285 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1286 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1287 if (!mos7840_port->busy[i])
3f542974 1288 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1289 }
0de9a702 1290 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1291
0de9a702 1292 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
9c134a14 1293 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
0de9a702 1294 return room;
3f542974
PS		 1295
1296}
1297
1298/*****************************************************************************
1299 * mos7840_write
1300 * this function is called by the tty driver when data should be written to
1301 * the port.
1302 * If successful, we return the number of bytes written, otherwise we
1303 * return a negative error number.
1304 *****************************************************************************/
1305
95da310e 1306static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1307 const unsigned char *data, int count)
1308{
1309 int status;
1310 int i;
1311 int bytes_sent = 0;
1312 int transfer_size;
0de9a702 1313 unsigned long flags;
3f542974
PS		 1314
1315 struct moschip_port *mos7840_port;
1316 struct usb_serial *serial;
1317 struct urb *urb;
880af9db 1318 /* __u16 Data; */
3f542974
PS		 1319 const unsigned char *current_position = data;
1320 unsigned char *data1;
3f542974
PS		 1321
1322#ifdef NOTMOS7840
1323 Data = 0x00;
3f542974
PS		 1324 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1325 mos7840_port->shadowLCR = Data;
9c134a14
GKH		 1326 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1327 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974 1328
880af9db
AC		 1329 /* Data = 0x03; */
1330 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1331 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1332
880af9db 1333 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1334 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1335
880af9db
AC		 1336 /* Data = 0x0c; */
1337 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1338 Data = 0x00;
3f542974 1339 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
9c134a14 1340 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
3f542974
PS		 1341
1342 Data = 0x0;
3f542974 1343 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
9c134a14 1344 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
3f542974
PS		 1345
1346 Data = Data & ~SERIAL_LCR_DLAB;
9c134a14 1347 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1348 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1349#endif
1350
9c134a14 1351 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1352 return -1;
3f542974
PS		 1353
1354 serial = port->serial;
9c134a14 1355 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 1356 return -1;
3f542974
PS		 1357
1358 mos7840_port = mos7840_get_port_private(port);
9c134a14 1359 if (mos7840_port == NULL)
3f542974 1360 return -1;
3f542974
PS		 1361
1362 /* try to find a free urb in the list */
1363 urb = NULL;
1364
0de9a702 1365 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1366 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1367 if (!mos7840_port->busy[i]) {
1368 mos7840_port->busy[i] = 1;
3f542974 1369 urb = mos7840_port->write_urb_pool[i];
9c134a14 1370 dev_dbg(&port->dev, "URB:%d\n", i);
3f542974
PS		 1371 break;
1372 }
1373 }
0de9a702 1374 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1375
1376 if (urb == NULL) {
9c134a14 1377 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
3f542974
PS		 1378 goto exit;
1379 }
1380
1381 if (urb->transfer_buffer == NULL) {
1382 urb->transfer_buffer =
1383 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1384
1385 if (urb->transfer_buffer == NULL) {
22a416c4 1386 dev_err_console(port, "%s no more kernel memory...\n",
194343d9 1387 __func__);
3f542974
PS		 1388 goto exit;
1389 }
1390 }
1391 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1392
97c4965d 1393 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1394
1395 /* fill urb with data and submit */
1143832e 1396 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
093ea2d3
DL		 1397 usb_fill_bulk_urb(urb,
1398 serial->dev,
1399 usb_sndbulkpipe(serial->dev,
1400 (port->bulk_out_endpointAddress) + 2),
1401 urb->transfer_buffer,
1402 transfer_size,
1403 mos7840_bulk_out_data_callback, mos7840_port);
1404 } else {
1405 usb_fill_bulk_urb(urb,
1406 serial->dev,
1407 usb_sndbulkpipe(serial->dev,
1408 port->bulk_out_endpointAddress),
1409 urb->transfer_buffer,
1410 transfer_size,
1411 mos7840_bulk_out_data_callback, mos7840_port);
1412 }
3f542974
PS		 1413
1414 data1 = urb->transfer_buffer;
9c134a14 1415 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
3f542974 1416
05cf0dec
JH		 1417 if (mos7840_port->has_led)
1418 mos7840_led_activity(port);
0eafe4de 1419
3f542974
PS		 1420 /* send it down the pipe */
1421 status = usb_submit_urb(urb, GFP_ATOMIC);
1422
1423 if (status) {
0de9a702 1424 mos7840_port->busy[i] = 0;
22a416c4 1425 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
194343d9 1426 "with status = %d\n", __func__, status);
3f542974
PS		 1427 bytes_sent = status;
1428 goto exit;
1429 }
1430 bytes_sent = transfer_size;
8c1a07ff
JH		 1431 port->icount.tx += transfer_size;
1432 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx);
95da310e 1433exit:
3f542974
PS		 1434 return bytes_sent;
1435
1436}
1437
1438/*****************************************************************************
1439 * mos7840_throttle
1440 * this function is called by the tty driver when it wants to stop the data
1441 * being read from the port.
1442 *****************************************************************************/
1443
95da310e 1444static void mos7840_throttle(struct tty_struct *tty)
3f542974 1445{
95da310e 1446 struct usb_serial_port *port = tty->driver_data;
3f542974 1447 struct moschip_port *mos7840_port;
3f542974
PS		 1448 int status;
1449
9c134a14 1450 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1451 return;
3f542974
PS		 1452
1453 mos7840_port = mos7840_get_port_private(port);
1454
1455 if (mos7840_port == NULL)
1456 return;
1457
1458 if (!mos7840_port->open) {
9c134a14 1459 dev_dbg(&port->dev, "%s", "port not opened\n");
3f542974
PS		 1460 return;
1461 }
1462
3f542974
PS		 1463 /* if we are implementing XON/XOFF, send the stop character */
1464 if (I_IXOFF(tty)) {
1465 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1466 status = mos7840_write(tty, port, &stop_char, 1);
1467 if (status <= 0)
3f542974 1468 return;
3f542974 1469 }
3f542974 1470 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1471 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1472 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1473 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1474 mos7840_port->shadowMCR);
95da310e 1475 if (status < 0)
3f542974 1476 return;
3f542974 1477 }
3f542974
PS		 1478}
1479
1480/*****************************************************************************
1481 * mos7840_unthrottle
880af9db
AC		 1482 * this function is called by the tty driver when it wants to resume
1483 * the data being read from the port (called after mos7840_throttle is
1484 * called)
3f542974 1485 *****************************************************************************/
95da310e 1486static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1487{
95da310e 1488 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1489 int status;
1490 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1491
9c134a14 1492 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1493 return;
3f542974
PS		 1494
1495 if (mos7840_port == NULL)
1496 return;
1497
1498 if (!mos7840_port->open) {
9c134a14 1499 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1500 return;
1501 }
1502
3f542974
PS		 1503 /* if we are implementing XON/XOFF, send the start character */
1504 if (I_IXOFF(tty)) {
1505 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1506 status = mos7840_write(tty, port, &start_char, 1);
1507 if (status <= 0)
3f542974 1508 return;
3f542974
PS		 1509 }
1510
1511 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1512 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1513 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1514 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1515 mos7840_port->shadowMCR);
95da310e 1516 if (status < 0)
3f542974 1517 return;
3f542974 1518 }
3f542974
PS		 1519}
1520
60b33c13 1521static int mos7840_tiocmget(struct tty_struct *tty)
3f542974 1522{
95da310e 1523 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1524 struct moschip_port *mos7840_port;
1525 unsigned int result;
1526 __u16 msr;
1527 __u16 mcr;
880af9db 1528 int status;
3f542974
PS		 1529 mos7840_port = mos7840_get_port_private(port);
1530
3f542974
PS		 1531 if (mos7840_port == NULL)
1532 return -ENODEV;
1533
1534 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
a91ccd26
JH		 1535 if (status != 1)
1536 return -EIO;
3f542974 1537 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
a91ccd26
JH		 1538 if (status != 1)
1539 return -EIO;
3f542974
PS		 1540 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1541 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1542 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1543 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1544 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1545 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1546 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1547
9c134a14 1548 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
3f542974
PS		 1549
1550 return result;
1551}
1552
20b9d177 1553static int mos7840_tiocmset(struct tty_struct *tty,
3f542974
PS		 1554 unsigned int set, unsigned int clear)
1555{
95da310e 1556 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1557 struct moschip_port *mos7840_port;
1558 unsigned int mcr;
87521c46 1559 int status;
3f542974 1560
3f542974
PS		 1561 mos7840_port = mos7840_get_port_private(port);
1562
1563 if (mos7840_port == NULL)
1564 return -ENODEV;
1565
e2984494 1566 /* FIXME: What locks the port registers ? */
3f542974
PS		 1567 mcr = mos7840_port->shadowMCR;
1568 if (clear & TIOCM_RTS)
1569 mcr &= ~MCR_RTS;
1570 if (clear & TIOCM_DTR)
1571 mcr &= ~MCR_DTR;
1572 if (clear & TIOCM_LOOP)
1573 mcr &= ~MCR_LOOPBACK;
1574
1575 if (set & TIOCM_RTS)
1576 mcr |= MCR_RTS;
1577 if (set & TIOCM_DTR)
1578 mcr |= MCR_DTR;
1579 if (set & TIOCM_LOOP)
1580 mcr |= MCR_LOOPBACK;
1581
1582 mos7840_port->shadowMCR = mcr;
1583
3f542974
PS		 1584 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1585 if (status < 0) {
9c134a14 1586 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
87521c46 1587 return status;
3f542974
PS		 1588 }
1589
1590 return 0;
1591}
1592
1593/*****************************************************************************
1594 * mos7840_calc_baud_rate_divisor
1595 * this function calculates the proper baud rate divisor for the specified
1596 * baud rate.
1597 *****************************************************************************/
9c134a14
GKH		 1598static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1599 int baudRate, int *divisor,
880af9db 1600 __u16 *clk_sel_val)
3f542974 1601{
9c134a14 1602 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
3f542974
PS		 1603
1604 if (baudRate <= 115200) {
1605 *divisor = 115200 / baudRate;
1606 *clk_sel_val = 0x0;
1607 }
1608 if ((baudRate > 115200) && (baudRate <= 230400)) {
1609 *divisor = 230400 / baudRate;
1610 *clk_sel_val = 0x10;
1611 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1612 *divisor = 403200 / baudRate;
1613 *clk_sel_val = 0x20;
1614 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1615 *divisor = 460800 / baudRate;
1616 *clk_sel_val = 0x30;
1617 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1618 *divisor = 806400 / baudRate;
1619 *clk_sel_val = 0x40;
1620 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1621 *divisor = 921600 / baudRate;
1622 *clk_sel_val = 0x50;
1623 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1624 *divisor = 1572864 / baudRate;
1625 *clk_sel_val = 0x60;
1626 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1627 *divisor = 3145728 / baudRate;
1628 *clk_sel_val = 0x70;
1629 }
1630 return 0;
1631
1632#ifdef NOTMCS7840
1633
1634 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1635 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1636 *divisor = mos7840_divisor_table[i].Divisor;
1637 return 0;
1638 }
1639 }
1640
1641 /* After trying for all the standard baud rates *
1642 * Try calculating the divisor for this baud rate */
1643
1644 if (baudrate > 75 && baudrate < 230400) {
1645 /* get the divisor */
1646 custom = (__u16) (230400L / baudrate);
1647
1648 /* Check for round off */
1649 round1 = (__u16) (2304000L / baudrate);
1650 round = (__u16) (round1 - (custom * 10));
880af9db 1651 if (round > 4)
3f542974 1652 custom++;
3f542974
PS		 1653 *divisor = custom;
1654
9c134a14 1655 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
3f542974
PS		 1656 return 0;
1657 }
1658
9c134a14 1659 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
3f542974
PS		 1660 return -1;
1661#endif
1662}
1663
1664/*****************************************************************************
1665 * mos7840_send_cmd_write_baud_rate
1666 * this function sends the proper command to change the baud rate of the
1667 * specified port.
1668 *****************************************************************************/
1669
1670static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1671 int baudRate)
1672{
1673 int divisor = 0;
1674 int status;
1675 __u16 Data;
1676 unsigned char number;
1677 __u16 clk_sel_val;
1678 struct usb_serial_port *port;
1679
1680 if (mos7840_port == NULL)
1681 return -1;
1682
9c134a14
GKH		 1683 port = mos7840_port->port;
1684 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1685 return -1;
3f542974 1686
9c134a14 1687 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1688 return -1;
3f542974 1689
1143832e 1690 number = mos7840_port->port->port_number;
3f542974 1691
1143832e 1692 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate);
880af9db 1693 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1694 if (baudRate > 115200) {
1695#ifdef HW_flow_control
880af9db
AC		 1696 /* NOTE: need to see the pther register to modify */
1697 /* setting h/w flow control bit to 1 */
3f542974
PS		 1698 Data = 0x2b;
1699 mos7840_port->shadowMCR = Data;
880af9db
AC		 1700 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1701 Data);
3f542974 1702 if (status < 0) {
9c134a14 1703 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1704 return -1;
1705 }
1706#endif
1707
1708 } else {
1709#ifdef HW_flow_control
093ea2d3 1710 /* setting h/w flow control bit to 0 */
3f542974
PS		 1711 Data = 0xb;
1712 mos7840_port->shadowMCR = Data;
880af9db
AC		 1713 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1714 Data);
3f542974 1715 if (status < 0) {
9c134a14 1716 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1717 return -1;
1718 }
1719#endif
1720
1721 }
1722
880af9db 1723 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1724 clk_sel_val = 0x0;
1725 Data = 0x0;
9c134a14 1726 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
3f542974 1727 &clk_sel_val);
880af9db
AC		 1728 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1729 &Data);
3f542974 1730 if (status < 0) {
9c134a14 1731 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
3f542974
PS		 1732 return -1;
1733 }
1734 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1735 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1736 Data);
3f542974 1737 if (status < 0) {
9c134a14 1738 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1739 return -1;
1740 }
1741 /* Calculate the Divisor */
1742
1743 if (status) {
194343d9 1744 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1745 return status;
1746 }
1747 /* Enable access to divisor latch */
1748 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1749 mos7840_port->shadowLCR = Data;
1750 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1751
1752 /* Write the divisor */
1753 Data = (unsigned char)(divisor & 0xff);
9c134a14 1754 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
3f542974
PS		 1755 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1756
1757 Data = (unsigned char)((divisor & 0xff00) >> 8);
9c134a14 1758 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
3f542974
PS		 1759 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1760
1761 /* Disable access to divisor latch */
1762 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1763 mos7840_port->shadowLCR = Data;
1764 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1765
1766 }
3f542974
PS		 1767 return status;
1768}
1769
1770/*****************************************************************************
1771 * mos7840_change_port_settings
1772 * This routine is called to set the UART on the device to match
1773 * the specified new settings.
1774 *****************************************************************************/
1775
95da310e
AC		 1776static void mos7840_change_port_settings(struct tty_struct *tty,
1777 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1778{
3f542974
PS		 1779 int baud;
1780 unsigned cflag;
1781 unsigned iflag;
1782 __u8 lData;
1783 __u8 lParity;
1784 __u8 lStop;
1785 int status;
1786 __u16 Data;
1787 struct usb_serial_port *port;
1788 struct usb_serial *serial;
1789
1790 if (mos7840_port == NULL)
1791 return;
1792
9c134a14 1793 port = mos7840_port->port;
3f542974 1794
9c134a14 1795 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1796 return;
3f542974 1797
9c134a14 1798 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1799 return;
3f542974
PS		 1800
1801 serial = port->serial;
1802
3f542974 1803 if (!mos7840_port->open) {
9c134a14 1804 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1805 return;
1806 }
1807
3f542974
PS		 1808 lData = LCR_BITS_8;
1809 lStop = LCR_STOP_1;
1810 lParity = LCR_PAR_NONE;
1811
adc8d746
AC		 1812 cflag = tty->termios.c_cflag;
1813 iflag = tty->termios.c_iflag;
3f542974
PS		 1814
1815 /* Change the number of bits */
1816 if (cflag & CSIZE) {
1817 switch (cflag & CSIZE) {
1818 case CS5:
1819 lData = LCR_BITS_5;
1820 break;
1821
1822 case CS6:
1823 lData = LCR_BITS_6;
1824 break;
1825
1826 case CS7:
1827 lData = LCR_BITS_7;
1828 break;
1829 default:
1830 case CS8:
1831 lData = LCR_BITS_8;
1832 break;
1833 }
1834 }
1835 /* Change the Parity bit */
1836 if (cflag & PARENB) {
1837 if (cflag & PARODD) {
1838 lParity = LCR_PAR_ODD;
9c134a14 1839 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
3f542974
PS		 1840 } else {
1841 lParity = LCR_PAR_EVEN;
9c134a14 1842 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
3f542974
PS		 1843 }
1844
1845 } else {
9c134a14 1846 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
3f542974
PS		 1847 }
1848
880af9db 1849 if (cflag & CMSPAR)
3f542974 1850 lParity = lParity | 0x20;
3f542974
PS		 1851
1852 /* Change the Stop bit */
1853 if (cflag & CSTOPB) {
1854 lStop = LCR_STOP_2;
9c134a14 1855 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
3f542974
PS		 1856 } else {
1857 lStop = LCR_STOP_1;
9c134a14 1858 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
3f542974
PS		 1859 }
1860
1861 /* Update the LCR with the correct value */
1862 mos7840_port->shadowLCR &=
1863 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1864 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1865
9c134a14
GKH		 1866 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1867 mos7840_port->shadowLCR);
3f542974
PS		 1868 /* Disable Interrupts */
1869 Data = 0x00;
1870 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1871
1872 Data = 0x00;
1873 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1874
1875 Data = 0xcf;
1876 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1877
1878 /* Send the updated LCR value to the mos7840 */
1879 Data = mos7840_port->shadowLCR;
1880
1881 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1882
1883 Data = 0x00b;
1884 mos7840_port->shadowMCR = Data;
1885 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1886 Data = 0x00b;
1887 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1888
1889 /* set up the MCR register and send it to the mos7840 */
1890
1891 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 1892 if (cflag & CBAUD)
3f542974 1893 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 1894
880af9db 1895 if (cflag & CRTSCTS)
3f542974 1896 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 1897 else
3f542974 1898 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 1899
1900 Data = mos7840_port->shadowMCR;
1901 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1902
1903 /* Determine divisor based on baud rate */
1904 baud = tty_get_baud_rate(tty);
1905
1906 if (!baud) {
1907 /* pick a default, any default... */
9c134a14 1908 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
3f542974
PS		 1909 baud = 9600;
1910 }
1911
9c134a14 1912 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
3f542974
PS		 1913 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1914
1915 /* Enable Interrupts */
1916 Data = 0x0c;
1917 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1918
50de36f7 1919 if (mos7840_port->read_urb_busy == false) {
50de36f7 1920 mos7840_port->read_urb_busy = true;
3f542974 1921 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
3f542974 1922 if (status) {
9c134a14 1923 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 1924 status);
50de36f7 1925 mos7840_port->read_urb_busy = false;
3f542974
PS		 1926 }
1927 }
9c134a14
GKH		 1928 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1929 mos7840_port->shadowLCR);
3f542974
PS		 1930}
1931
1932/*****************************************************************************
1933 * mos7840_set_termios
1934 * this function is called by the tty driver when it wants to change
1935 * the termios structure
1936 *****************************************************************************/
1937
95da310e
AC		 1938static void mos7840_set_termios(struct tty_struct *tty,
1939 struct usb_serial_port *port,
606d099c 1940 struct ktermios *old_termios)
3f542974
PS		 1941{
1942 int status;
1943 unsigned int cflag;
1944 struct usb_serial *serial;
1945 struct moschip_port *mos7840_port;
3363155b 1946
9c134a14 1947 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1948 return;
3f542974
PS		 1949
1950 serial = port->serial;
1951
9c134a14 1952 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 1953 return;
3f542974
PS		 1954
1955 mos7840_port = mos7840_get_port_private(port);
1956
1957 if (mos7840_port == NULL)
1958 return;
1959
3f542974 1960 if (!mos7840_port->open) {
9c134a14 1961 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1962 return;
1963 }
1964
9c134a14 1965 dev_dbg(&port->dev, "%s", "setting termios - \n");
3f542974 1966
adc8d746 1967 cflag = tty->termios.c_cflag;
3f542974 1968
9c134a14 1969 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
d9a80746 1970 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
9c134a14
GKH		 1971 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
1972 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
3f542974
PS		 1973
1974 /* change the port settings to the new ones specified */
1975
95da310e 1976 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 1977
1978 if (!mos7840_port->read_urb) {
9c134a14 1979 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
3f542974
PS		 1980 return;
1981 }
1982
50de36f7 1983 if (mos7840_port->read_urb_busy == false) {
50de36f7 1984 mos7840_port->read_urb_busy = true;
3f542974
PS		 1985 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
1986 if (status) {
9c134a14 1987 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 1988 status);
50de36f7 1989 mos7840_port->read_urb_busy = false;
3f542974
PS		 1990 }
1991 }
3f542974
PS		 1992}
1993
1994/*****************************************************************************
1995 * mos7840_get_lsr_info - get line status register info
1996 *
1997 * Purpose: Let user call ioctl() to get info when the UART physically
1998 * is emptied. On bus types like RS485, the transmitter must
1999 * release the bus after transmitting. This must be done when
2000 * the transmit shift register is empty, not be done when the
2001 * transmit holding register is empty. This functionality
2002 * allows an RS485 driver to be written in user space.
2003 *****************************************************************************/
2004
95da310e 2005static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2006 unsigned int __user *value)
3f542974
PS		 2007{
2008 int count;
2009 unsigned int result = 0;
2010
95da310e 2011 count = mos7840_chars_in_buffer(tty);
9c134a14 2012 if (count == 0)
3f542974 2013 result = TIOCSER_TEMT;
3f542974
PS		 2014
2015 if (copy_to_user(value, &result, sizeof(int)))
2016 return -EFAULT;
2017 return 0;
2018}
2019
3f542974
PS		 2020/*****************************************************************************
2021 * mos7840_get_serial_info
2022 * function to get information about serial port
2023 *****************************************************************************/
2024
2025static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2026 struct serial_struct __user *retinfo)
3f542974
PS		 2027{
2028 struct serial_struct tmp;
2029
2030 if (mos7840_port == NULL)
2031 return -1;
2032
2033 if (!retinfo)
2034 return -EFAULT;
2035
2036 memset(&tmp, 0, sizeof(tmp));
2037
2038 tmp.type = PORT_16550A;
e5b1e206 2039 tmp.line = mos7840_port->port->minor;
1143832e 2040 tmp.port = mos7840_port->port->port_number;
3f542974
PS		 2041 tmp.irq = 0;
2042 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2043 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2044 tmp.baud_base = 9600;
2045 tmp.close_delay = 5 * HZ;
2046 tmp.closing_wait = 30 * HZ;
2047
2048 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2049 return -EFAULT;
2050 return 0;
2051}
2052
2053/*****************************************************************************
2054 * SerialIoctl
2055 * this function handles any ioctl calls to the driver
2056 *****************************************************************************/
2057
00a0d0d6 2058static int mos7840_ioctl(struct tty_struct *tty,
3f542974
PS		 2059 unsigned int cmd, unsigned long arg)
2060{
95da310e 2061 struct usb_serial_port *port = tty->driver_data;
97c4965d 2062 void __user *argp = (void __user *)arg;
3f542974 2063 struct moschip_port *mos7840_port;
3f542974 2064
9c134a14 2065 if (mos7840_port_paranoia_check(port, __func__))
3f542974 2066 return -1;
3f542974
PS		 2067
2068 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2069
2070 if (mos7840_port == NULL)
2071 return -1;
2072
9c134a14 2073 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
3f542974
PS		 2074
2075 switch (cmd) {
2076 /* return number of bytes available */
2077
3f542974 2078 case TIOCSERGETLSR:
9c134a14 2079 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
95da310e 2080 return mos7840_get_lsr_info(tty, argp);
3f542974 2081
3f542974 2082 case TIOCGSERIAL:
9c134a14 2083 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
97c4965d 2084 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2085
2086 case TIOCSSERIAL:
9c134a14 2087 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
3f542974 2088 break;
3f542974
PS		 2089 default:
2090 break;
2091 }
3f542974
PS		 2092 return -ENOIOCTLCMD;
2093}
2094
0eafe4de
D		 2095static int mos7810_check(struct usb_serial *serial)
2096{
2097 int i, pass_count = 0;
15ee89c3 2098 u8 *buf;
0eafe4de
D		 2099 __u16 data = 0, mcr_data = 0;
2100 __u16 test_pattern = 0x55AA;
15ee89c3
JH		 2101 int res;
2102
2103 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2104 if (!buf)
2105 return 0; /* failed to identify 7810 */
0eafe4de
D		 2106
2107 /* Store MCR setting */
15ee89c3 2108 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
0eafe4de 2109 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
15ee89c3
JH		 2110 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2111 if (res == VENDOR_READ_LENGTH)
2112 mcr_data = *buf;
0eafe4de
D		 2113
2114 for (i = 0; i < 16; i++) {
2115 /* Send the 1-bit test pattern out to MCS7810 test pin */
2116 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2117 MCS_WRREQ, MCS_WR_RTYPE,
2118 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2119 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2120
2121 /* Read the test pattern back */
15ee89c3
JH		 2122 res = usb_control_msg(serial->dev,
2123 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ,
2124 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2125 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2126 if (res == VENDOR_READ_LENGTH)
2127 data = *buf;
0eafe4de
D		 2128
2129 /* If this is a MCS7810 device, both test patterns must match */
2130 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2131 break;
2132
2133 pass_count++;
2134 }
2135
2136 /* Restore MCR setting */
2137 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2138 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2139 0, MOS_WDR_TIMEOUT);
2140
15ee89c3
JH		 2141 kfree(buf);
2142
0eafe4de
D		 2143 if (pass_count == 16)
2144 return 1;
2145
2146 return 0;
2147}
2148
40c24f28
JH		 2149static int mos7840_probe(struct usb_serial *serial,
2150 const struct usb_device_id *id)
3f542974 2151{
d551ec9b 2152 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
15ee89c3 2153 u8 *buf;
40c24f28
JH		 2154 int device_type;
2155
2156 if (product == MOSCHIP_DEVICE_ID_7810 ||
2157 product == MOSCHIP_DEVICE_ID_7820) {
2158 device_type = product;
2159 goto out;
2160 }
093ea2d3 2161
15ee89c3 2162 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
40c24f28
JH		 2163 if (!buf)
2164 return -ENOMEM;
2165
2166 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
15ee89c3
JH		 2167 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2168 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
093ea2d3 2169
40c24f28
JH		 2170 /* For a MCS7840 device GPIO0 must be set to 1 */
2171 if (buf[0] & 0x01)
2172 device_type = MOSCHIP_DEVICE_ID_7840;
2173 else if (mos7810_check(serial))
2174 device_type = MOSCHIP_DEVICE_ID_7810;
2175 else
2176 device_type = MOSCHIP_DEVICE_ID_7820;
2177
2178 kfree(buf);
2179out:
683a0e4d 2180 usb_set_serial_data(serial, (void *)(unsigned long)device_type);
40c24f28
JH		 2181
2182 return 0;
2183}
2184
2185static int mos7840_calc_num_ports(struct usb_serial *serial)
2186{
683a0e4d 2187 int device_type = (unsigned long)usb_get_serial_data(serial);
40c24f28 2188 int mos7840_num_ports;
093ea2d3 2189
0eafe4de 2190 mos7840_num_ports = (device_type >> 4) & 0x000F;
0eafe4de 2191
3f542974
PS		 2192 return mos7840_num_ports;
2193}
2194
80c00750 2195static int mos7840_port_probe(struct usb_serial_port *port)
3f542974 2196{
80c00750 2197 struct usb_serial *serial = port->serial;
683a0e4d 2198 int device_type = (unsigned long)usb_get_serial_data(serial);
3f542974 2199 struct moschip_port *mos7840_port;
80c00750
JH		 2200 int status;
2201 int pnum;
3f542974 2202 __u16 Data;
3f542974 2203
3f542974
PS		 2204 /* we set up the pointers to the endpoints in the mos7840_open *
2205 * function, as the structures aren't created yet. */
2206
1143832e 2207 pnum = port->port_number;
80c00750 2208
ae685eff
JH		 2209 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2210 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2211 if (mos7840_port == NULL) {
2212 dev_err(&port->dev, "%s - Out of memory\n", __func__);
2213 return -ENOMEM;
2214 }
3f542974 2215
ae685eff
JH		 2216 /* Initialize all port interrupt end point to port 0 int
2217 * endpoint. Our device has only one interrupt end point
2218 * common to all port */
2219
2220 mos7840_port->port = port;
2221 mos7840_set_port_private(port, mos7840_port);
2222 spin_lock_init(&mos7840_port->pool_lock);
2223
2224 /* minor is not initialised until later by
2225 * usb-serial.c:get_free_serial() and cannot therefore be used
2226 * to index device instances */
2227 mos7840_port->port_num = pnum + 1;
e5b1e206 2228 dev_dbg(&port->dev, "port->minor = %d\n", port->minor);
ae685eff 2229 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
ae685eff
JH		 2230
2231 if (mos7840_port->port_num == 1) {
2232 mos7840_port->SpRegOffset = 0x0;
2233 mos7840_port->ControlRegOffset = 0x1;
2234 mos7840_port->DcrRegOffset = 0x4;
2235 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2236 mos7840_port->SpRegOffset = 0x8;
2237 mos7840_port->ControlRegOffset = 0x9;
2238 mos7840_port->DcrRegOffset = 0x16;
2239 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2240 mos7840_port->SpRegOffset = 0xa;
2241 mos7840_port->ControlRegOffset = 0xb;
2242 mos7840_port->DcrRegOffset = 0x19;
2243 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2244 mos7840_port->SpRegOffset = 0xa;
2245 mos7840_port->ControlRegOffset = 0xb;
2246 mos7840_port->DcrRegOffset = 0x19;
2247 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2248 mos7840_port->SpRegOffset = 0xc;
2249 mos7840_port->ControlRegOffset = 0xd;
2250 mos7840_port->DcrRegOffset = 0x1c;
2251 }
2252 mos7840_dump_serial_port(port, mos7840_port);
2253 mos7840_set_port_private(port, mos7840_port);
2254
2255 /* enable rx_disable bit in control register */
2256 status = mos7840_get_reg_sync(port,
2257 mos7840_port->ControlRegOffset, &Data);
2258 if (status < 0) {
2259 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2260 goto out;
2261 } else
2262 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2263 Data |= 0x08; /* setting driver done bit */
2264 Data |= 0x04; /* sp1_bit to have cts change reflect in
2265 modem status reg */
2266
2267 /* Data |= 0x20; //rx_disable bit */
2268 status = mos7840_set_reg_sync(port,
2269 mos7840_port->ControlRegOffset, Data);
2270 if (status < 0) {
2271 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2272 goto out;
2273 } else
2274 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2275
2276 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2277 and 0x24 in DCR3 */
2278 Data = 0x01;
2279 status = mos7840_set_reg_sync(port,
2280 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2281 if (status < 0) {
2282 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2283 goto out;
2284 } else
2285 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
3f542974 2286
ae685eff
JH		 2287 Data = 0x05;
2288 status = mos7840_set_reg_sync(port,
2289 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2290 if (status < 0) {
2291 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2292 goto out;
2293 } else
2294 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
3f542974 2295
ae685eff
JH		 2296 Data = 0x24;
2297 status = mos7840_set_reg_sync(port,
2298 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2299 if (status < 0) {
2300 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2301 goto out;
2302 } else
2303 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
3f542974 2304
ae685eff
JH		 2305 /* write values in clkstart0x0 and clkmulti 0x20 */
2306 Data = 0x0;
2307 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2308 if (status < 0) {
2309 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2310 goto out;
2311 } else
2312 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
3f542974 2313
ae685eff
JH		 2314 Data = 0x20;
2315 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2316 if (status < 0) {
2317 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2318 goto error;
2319 } else
2320 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
3f542974 2321
ae685eff
JH		 2322 /* write value 0x0 to scratchpad register */
2323 Data = 0x00;
2324 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2325 if (status < 0) {
2326 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2327 goto out;
2328 } else
2329 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2330
2331 /* Zero Length flag register */
2332 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2333 Data = 0xff;
80c00750 2334 status = mos7840_set_reg_sync(port,
ae685eff
JH		 2335 (__u16) (ZLP_REG1 +
2336 ((__u16)mos7840_port->port_num)), Data);
2337 dev_dbg(&port->dev, "ZLIP offset %x\n",
2338 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
3f542974 2339 if (status < 0) {
ae685eff
JH		 2340 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2341 goto out;
3f542974 2342 } else
ae685eff
JH		 2343 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2344 } else {
2345 Data = 0xff;
80c00750 2346 status = mos7840_set_reg_sync(port,
ae685eff
JH		 2347 (__u16) (ZLP_REG1 +
2348 ((__u16)mos7840_port->port_num) - 0x1), Data);
2349 dev_dbg(&port->dev, "ZLIP offset %x\n",
2350 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
3f542974 2351 if (status < 0) {
ae685eff
JH		 2352 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2353 goto out;
3f542974 2354 } else
ae685eff 2355 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
3f542974 2356
ae685eff
JH		 2357 }
2358 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2359 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2360 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2361 GFP_KERNEL);
2362 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2363 !mos7840_port->dr) {
2364 status = -ENOMEM;
2365 goto error;
2366 }
0eafe4de 2367
ae685eff 2368 mos7840_port->has_led = false;
0eafe4de 2369
ae685eff
JH		 2370 /* Initialize LED timers */
2371 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2372 mos7840_port->has_led = true;
0eafe4de 2373
05cf0dec
JH		 2374 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL);
2375 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr),
2376 GFP_KERNEL);
2377 if (!mos7840_port->led_urb || !mos7840_port->led_dr) {
2378 status = -ENOMEM;
2379 goto error;
2380 }
2381
ae685eff
JH		 2382 init_timer(&mos7840_port->led_timer1);
2383 mos7840_port->led_timer1.function = mos7840_led_off;
2384 mos7840_port->led_timer1.expires =
2385 jiffies + msecs_to_jiffies(LED_ON_MS);
2386 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
0eafe4de 2387
ae685eff
JH		 2388 init_timer(&mos7840_port->led_timer2);
2389 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2390 mos7840_port->led_timer2.expires =
2391 jiffies + msecs_to_jiffies(LED_OFF_MS);
2392 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
0eafe4de 2393
ae685eff
JH		 2394 /* Turn off LED */
2395 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2396 }
2397out:
80c00750
JH		 2398 if (pnum == serial->num_ports - 1) {
2399 /* Zero Length flag enable */
2400 Data = 0x0f;
2401 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2402 if (status < 0) {
2403 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2404 goto error;
2405 } else
2406 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2407
2408 /* setting configuration feature to one */
2409 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2410 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2411 MOS_WDR_TIMEOUT);
2412 }
3f542974 2413 return 0;
0de9a702 2414error:
05cf0dec
JH		 2415 kfree(mos7840_port->led_dr);
2416 usb_free_urb(mos7840_port->led_urb);
80c00750
JH		 2417 kfree(mos7840_port->dr);
2418 kfree(mos7840_port->ctrl_buf);
2419 usb_free_urb(mos7840_port->control_urb);
2420 kfree(mos7840_port);
0de9a702 2421
0de9a702 2422 return status;
3f542974
PS		 2423}
2424
80c00750 2425static int mos7840_port_remove(struct usb_serial_port *port)
3f542974 2426{
3f542974 2427 struct moschip_port *mos7840_port;
3f542974 2428
80c00750 2429 mos7840_port = mos7840_get_port_private(port);
3f542974 2430
80c00750
JH		 2431 if (mos7840_port->has_led) {
2432 /* Turn off LED */
2433 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
3f542974 2434
80c00750
JH		 2435 del_timer_sync(&mos7840_port->led_timer1);
2436 del_timer_sync(&mos7840_port->led_timer2);
05cf0dec
JH		 2437
2438 usb_kill_urb(mos7840_port->led_urb);
2439 usb_free_urb(mos7840_port->led_urb);
2440 kfree(mos7840_port->led_dr);
f9c99bb8 2441 }
80c00750
JH		 2442 usb_kill_urb(mos7840_port->control_urb);
2443 usb_free_urb(mos7840_port->control_urb);
2444 kfree(mos7840_port->ctrl_buf);
2445 kfree(mos7840_port->dr);
2446 kfree(mos7840_port);
f9c99bb8 2447
80c00750 2448 return 0;
3f542974
PS		 2449}
2450
2451static struct usb_serial_driver moschip7840_4port_device = {
2452 .driver = {
2453 .owner = THIS_MODULE,
2454 .name = "mos7840",
2455 },
2456 .description = DRIVER_DESC,
68e24113 2457 .id_table = id_table,
3f542974 2458 .num_ports = 4,
3f542974
PS		 2459 .open = mos7840_open,
2460 .close = mos7840_close,
2461 .write = mos7840_write,
2462 .write_room = mos7840_write_room,
2463 .chars_in_buffer = mos7840_chars_in_buffer,
2464 .throttle = mos7840_throttle,
2465 .unthrottle = mos7840_unthrottle,
2466 .calc_num_ports = mos7840_calc_num_ports,
40c24f28 2467 .probe = mos7840_probe,
3f542974
PS		 2468 .ioctl = mos7840_ioctl,
2469 .set_termios = mos7840_set_termios,
2470 .break_ctl = mos7840_break,
2471 .tiocmget = mos7840_tiocmget,
2472 .tiocmset = mos7840_tiocmset,
0c613371 2473 .tiocmiwait = usb_serial_generic_tiocmiwait,
8c1a07ff 2474 .get_icount = usb_serial_generic_get_icount,
80c00750
JH		 2475 .port_probe = mos7840_port_probe,
2476 .port_remove = mos7840_port_remove,
3f542974
PS		 2477 .read_bulk_callback = mos7840_bulk_in_callback,
2478 .read_int_callback = mos7840_interrupt_callback,
2479};
2480
4d2a7aff
AS		 2481static struct usb_serial_driver * const serial_drivers[] = {
2482 &moschip7840_4port_device, NULL
2483};
2484
68e24113 2485module_usb_serial_driver(serial_drivers, id_table);
3f542974 2486
3f542974
PS		 2487MODULE_DESCRIPTION(DRIVER_DESC);
2488MODULE_LICENSE("GPL");
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