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TTY: move low_latency to tty_port
[deliverable/linux.git] / drivers / usb / serial / mos7840.c
CommitLineData
3f542974
PS		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 *
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
18 *
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
22 *
23 */
24
25#include <linux/kernel.h>
26#include <linux/errno.h>
27#include <linux/init.h>
28#include <linux/slab.h>
29#include <linux/tty.h>
30#include <linux/tty_driver.h>
31#include <linux/tty_flip.h>
32#include <linux/module.h>
33#include <linux/serial.h>
34#include <linux/usb.h>
35#include <linux/usb/serial.h>
880af9db 36#include <linux/uaccess.h>
3f542974 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
186static int device_type;
3f542974 187
b9c87663 188static const struct usb_device_id id_table[] = {
3f542974
PS		 189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
190 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
0eafe4de 191 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
acf509ae 192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
870408c8 193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
acf509ae 194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
870408c8 195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
acf509ae
CB		 196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
11e1abb4 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
870408c8 201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
acf509ae 202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
870408c8 203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
27f1281d 204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
e9b8cffa 205 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
9d498bea 206 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
3f542974
PS		 207 {} /* terminating entry */
208};
68e24113 209MODULE_DEVICE_TABLE(usb, id_table);
3f542974
PS		 210
211/* This structure holds all of the local port information */
212
213struct moschip_port {
214 int port_num; /*Actual port number in the device(1,2,etc) */
215 struct urb *write_urb; /* write URB for this port */
216 struct urb *read_urb; /* read URB for this port */
217 __u8 shadowLCR; /* last LCR value received */
218 __u8 shadowMCR; /* last MCR value received */
219 char open;
0de9a702 220 char open_ports;
3f542974
PS		 221 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
222 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
223 int delta_msr_cond;
224 struct async_icount icount;
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;
244 bool led_flag;
245 struct timer_list led_timer1; /* Timer for LED on */
246 struct timer_list led_timer2; /* Timer for LED off */
247};
3f542974 248
3f542974
PS		 249/*
250 * mos7840_set_reg_sync
251 * To set the Control register by calling usb_fill_control_urb function
252 * by passing usb_sndctrlpipe function as parameter.
253 */
254
255static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
256 __u16 val)
257{
258 struct usb_device *dev = port->serial->dev;
259 val = val & 0x00ff;
9c134a14 260 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
3f542974
PS		 261
262 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
263 MCS_WR_RTYPE, val, reg, NULL, 0,
264 MOS_WDR_TIMEOUT);
265}
266
267/*
268 * mos7840_get_reg_sync
269 * To set the Uart register by calling usb_fill_control_urb function by
270 * passing usb_rcvctrlpipe function as parameter.
271 */
272
273static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
880af9db 274 __u16 *val)
3f542974
PS		 275{
276 struct usb_device *dev = port->serial->dev;
277 int ret = 0;
9e221a35
JH		 278 u8 *buf;
279
280 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
281 if (!buf)
282 return -ENOMEM;
3f542974
PS		 283
284 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 285 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
3f542974 286 MOS_WDR_TIMEOUT);
9e221a35 287 *val = buf[0];
9c134a14 288 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
9e221a35
JH		 289
290 kfree(buf);
3f542974
PS		 291 return ret;
292}
293
294/*
295 * mos7840_set_uart_reg
296 * To set the Uart register by calling usb_fill_control_urb function by
297 * passing usb_sndctrlpipe function as parameter.
298 */
299
300static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
301 __u16 val)
302{
303
304 struct usb_device *dev = port->serial->dev;
305 val = val & 0x00ff;
880af9db
AC		 306 /* For the UART control registers, the application number need
307 to be Or'ed */
0de9a702 308 if (port->serial->num_ports == 4) {
880af9db
AC		 309 val |= (((__u16) port->number -
310 (__u16) (port->serial->minor)) + 1) << 8;
3f542974
PS		 311 } else {
312 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 313 val |= (((__u16) port->number -
3f542974 314 (__u16) (port->serial->minor)) + 1) << 8;
3f542974 315 } else {
9c134a14 316 val |= (((__u16) port->number -
3f542974 317 (__u16) (port->serial->minor)) + 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) {
3f542974
PS		 346 Wval =
347 (((__u16) port->number - (__u16) (port->serial->minor)) +
348 1) << 8;
3f542974
PS		 349 } else {
350 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 351 Wval = (((__u16) port->number -
3f542974 352 (__u16) (port->serial->minor)) + 1) << 8;
3f542974 353 } else {
880af9db 354 Wval = (((__u16) port->number -
3f542974 355 (__u16) (port->serial->minor)) + 2) << 8;
3f542974
PS		 356 }
357 }
9c134a14 358 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
3f542974 359 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 360 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
3f542974 361 MOS_WDR_TIMEOUT);
9e221a35
JH		 362 *val = buf[0];
363
364 kfree(buf);
3f542974
PS		 365 return ret;
366}
367
9c134a14
GKH		 368static void mos7840_dump_serial_port(struct usb_serial_port *port,
369 struct moschip_port *mos7840_port)
3f542974
PS		 370{
371
9c134a14
GKH		 372 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
373 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
374 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
3f542974
PS		 375
376}
377
378/************************************************************************/
379/************************************************************************/
380/* I N T E R F A C E F U N C T I O N S */
381/* I N T E R F A C E F U N C T I O N S */
382/************************************************************************/
383/************************************************************************/
384
385static inline void mos7840_set_port_private(struct usb_serial_port *port,
386 struct moschip_port *data)
387{
388 usb_set_serial_port_data(port, (void *)data);
389}
390
391static inline struct moschip_port *mos7840_get_port_private(struct
392 usb_serial_port
393 *port)
394{
395 return (struct moschip_port *)usb_get_serial_port_data(port);
396}
397
0de9a702 398static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
3f542974
PS		 399{
400 struct moschip_port *mos7840_port;
401 struct async_icount *icount;
402 mos7840_port = port;
403 icount = &mos7840_port->icount;
404 if (new_msr &
405 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
406 MOS_MSR_DELTA_CD)) {
407 icount = &mos7840_port->icount;
408
409 /* update input line counters */
410 if (new_msr & MOS_MSR_DELTA_CTS) {
411 icount->cts++;
0de9a702 412 smp_wmb();
3f542974
PS		 413 }
414 if (new_msr & MOS_MSR_DELTA_DSR) {
415 icount->dsr++;
0de9a702 416 smp_wmb();
3f542974
PS		 417 }
418 if (new_msr & MOS_MSR_DELTA_CD) {
419 icount->dcd++;
0de9a702 420 smp_wmb();
3f542974
PS		 421 }
422 if (new_msr & MOS_MSR_DELTA_RI) {
423 icount->rng++;
0de9a702 424 smp_wmb();
3f542974
PS		 425 }
426 }
3f542974
PS		 427}
428
0de9a702 429static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
3f542974
PS		 430{
431 struct async_icount *icount;
432
3f542974 433 if (new_lsr & SERIAL_LSR_BI) {
880af9db
AC		 434 /*
435 * Parity and Framing errors only count if they
436 * occur exclusive of a break being
437 * received.
438 */
3f542974
PS		 439 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
440 }
441
442 /* update input line counters */
443 icount = &port->icount;
444 if (new_lsr & SERIAL_LSR_BI) {
445 icount->brk++;
0de9a702 446 smp_wmb();
3f542974
PS		 447 }
448 if (new_lsr & SERIAL_LSR_OE) {
449 icount->overrun++;
0de9a702 450 smp_wmb();
3f542974
PS		 451 }
452 if (new_lsr & SERIAL_LSR_PE) {
453 icount->parity++;
0de9a702 454 smp_wmb();
3f542974
PS		 455 }
456 if (new_lsr & SERIAL_LSR_FE) {
457 icount->frame++;
0de9a702 458 smp_wmb();
3f542974 459 }
3f542974
PS		 460}
461
462/************************************************************************/
463/************************************************************************/
464/* U S B C A L L B A C K F U N C T I O N S */
465/* U S B C A L L B A C K F U N C T I O N S */
466/************************************************************************/
467/************************************************************************/
468
7d12e780 469static void mos7840_control_callback(struct urb *urb)
3f542974
PS		 470{
471 unsigned char *data;
472 struct moschip_port *mos7840_port;
9c134a14 473 struct device *dev = &urb->dev->dev;
3f542974 474 __u8 regval = 0x0;
0643c724 475 int status = urb->status;
3f542974 476
cdc97792 477 mos7840_port = urb->context;
0de9a702 478
0643c724 479 switch (status) {
3f542974
PS		 480 case 0:
481 /* success */
482 break;
483 case -ECONNRESET:
484 case -ENOENT:
485 case -ESHUTDOWN:
486 /* this urb is terminated, clean up */
9c134a14 487 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
3f542974
PS		 488 return;
489 default:
9c134a14 490 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
28c3ae9a 491 return;
3f542974
PS		 492 }
493
9c134a14
GKH		 494 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
495 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
496 mos7840_port->MsrLsr, mos7840_port->port_num);
3f542974
PS		 497 data = urb->transfer_buffer;
498 regval = (__u8) data[0];
9c134a14 499 dev_dbg(dev, "%s data is %x\n", __func__, regval);
3f542974
PS		 500 if (mos7840_port->MsrLsr == 0)
501 mos7840_handle_new_msr(mos7840_port, regval);
502 else if (mos7840_port->MsrLsr == 1)
503 mos7840_handle_new_lsr(mos7840_port, regval);
3f542974
PS		 504}
505
506static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
880af9db 507 __u16 *val)
3f542974
PS		 508{
509 struct usb_device *dev = mcs->port->serial->dev;
0de9a702
ON		 510 struct usb_ctrlrequest *dr = mcs->dr;
511 unsigned char *buffer = mcs->ctrl_buf;
512 int ret;
3f542974 513
3f542974
PS		 514 dr->bRequestType = MCS_RD_RTYPE;
515 dr->bRequest = MCS_RDREQ;
880af9db 516 dr->wValue = cpu_to_le16(Wval); /* 0 */
3f542974
PS		 517 dr->wIndex = cpu_to_le16(reg);
518 dr->wLength = cpu_to_le16(2);
519
520 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
521 (unsigned char *)dr, buffer, 2,
522 mos7840_control_callback, mcs);
523 mcs->control_urb->transfer_buffer_length = 2;
524 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
525 return ret;
526}
527
0eafe4de
D		 528static void mos7840_set_led_callback(struct urb *urb)
529{
530 switch (urb->status) {
531 case 0:
532 /* Success */
533 break;
534 case -ECONNRESET:
535 case -ENOENT:
536 case -ESHUTDOWN:
537 /* This urb is terminated, clean up */
9c134a14
GKH		 538 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
539 __func__, urb->status);
0eafe4de
D		 540 break;
541 default:
9c134a14
GKH		 542 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
543 __func__, urb->status);
0eafe4de
D		 544 }
545}
546
547static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
548 __u16 reg)
549{
550 struct usb_device *dev = mcs->port->serial->dev;
551 struct usb_ctrlrequest *dr = mcs->dr;
552
553 dr->bRequestType = MCS_WR_RTYPE;
554 dr->bRequest = MCS_WRREQ;
555 dr->wValue = cpu_to_le16(wval);
556 dr->wIndex = cpu_to_le16(reg);
557 dr->wLength = cpu_to_le16(0);
558
559 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),
560 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
561
562 usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
563}
564
565static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
566 __u16 val)
567{
568 struct usb_device *dev = port->serial->dev;
569
570 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
571 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
572}
573
574static void mos7840_led_off(unsigned long arg)
575{
576 struct moschip_port *mcs = (struct moschip_port *) arg;
577
578 /* Turn off LED */
579 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
580 mod_timer(&mcs->led_timer2,
581 jiffies + msecs_to_jiffies(LED_OFF_MS));
582}
583
584static void mos7840_led_flag_off(unsigned long arg)
585{
586 struct moschip_port *mcs = (struct moschip_port *) arg;
587
588 mcs->led_flag = false;
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]);
652 wval =
653 (((__u16) serial->port[i]->number -
654 (__u16) (serial->minor)) + 1) << 8;
655 if (mos7840_port->open) {
656 if (sp[i] & 0x01) {
9c134a14 657 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
3f542974
PS		 658 } else {
659 switch (sp[i] & 0x0f) {
660 case SERIAL_IIR_RLS:
9c134a14
GKH		 661 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
662 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
3f542974 663 mos7840_port->MsrLsr = 1;
0de9a702 664 wreg = LINE_STATUS_REGISTER;
3f542974
PS		 665 break;
666 case SERIAL_IIR_MS:
9c134a14 667 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
3f542974 668 mos7840_port->MsrLsr = 0;
0de9a702 669 wreg = MODEM_STATUS_REGISTER;
3f542974
PS		 670 break;
671 }
e681b66f 672 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
3f542974
PS		 673 }
674 }
675 }
880af9db
AC		 676 if (!(rv < 0))
677 /* the completion handler for the control urb will resubmit */
0de9a702
ON		 678 return;
679exit:
3f542974
PS		 680 result = usb_submit_urb(urb, GFP_ATOMIC);
681 if (result) {
682 dev_err(&urb->dev->dev,
683 "%s - Error %d submitting interrupt urb\n",
441b62c1 684 __func__, result);
3f542974 685 }
3f542974
PS		 686}
687
688static int mos7840_port_paranoia_check(struct usb_serial_port *port,
689 const char *function)
690{
691 if (!port) {
9c134a14 692 pr_debug("%s - port == NULL\n", function);
3f542974
PS		 693 return -1;
694 }
695 if (!port->serial) {
9c134a14 696 pr_debug("%s - port->serial == NULL\n", function);
3f542974
PS		 697 return -1;
698 }
699
700 return 0;
701}
702
703/* Inline functions to check the sanity of a pointer that is passed to us */
704static int mos7840_serial_paranoia_check(struct usb_serial *serial,
705 const char *function)
706{
707 if (!serial) {
9c134a14 708 pr_debug("%s - serial == NULL\n", function);
3f542974
PS		 709 return -1;
710 }
711 if (!serial->type) {
9c134a14 712 pr_debug("%s - serial->type == NULL!\n", function);
3f542974
PS		 713 return -1;
714 }
715
716 return 0;
717}
718
719static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
720 const char *function)
721{
722 /* if no port was specified, or it fails a paranoia check */
723 if (!port ||
724 mos7840_port_paranoia_check(port, function) ||
725 mos7840_serial_paranoia_check(port->serial, function)) {
880af9db
AC		 726 /* then say that we don't have a valid usb_serial thing,
727 * which will end up genrating -ENODEV return values */
3f542974
PS		 728 return NULL;
729 }
730
731 return port->serial;
732}
733
734/*****************************************************************************
735 * mos7840_bulk_in_callback
736 * this is the callback function for when we have received data on the
737 * bulk in endpoint.
738 *****************************************************************************/
739
7d12e780 740static void mos7840_bulk_in_callback(struct urb *urb)
3f542974 741{
0643c724 742 int retval;
3f542974
PS		 743 unsigned char *data;
744 struct usb_serial *serial;
745 struct usb_serial_port *port;
746 struct moschip_port *mos7840_port;
747 struct tty_struct *tty;
0643c724 748 int status = urb->status;
3f542974 749
cdc97792 750 mos7840_port = urb->context;
9c134a14 751 if (!mos7840_port)
50de36f7 752 return;
50de36f7
GKH		 753
754 if (status) {
9c134a14 755 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
50de36f7 756 mos7840_port->read_urb_busy = false;
3f542974
PS		 757 return;
758 }
759
9c134a14 760 port = mos7840_port->port;
441b62c1 761 if (mos7840_port_paranoia_check(port, __func__)) {
50de36f7 762 mos7840_port->read_urb_busy = false;
3f542974
PS		 763 return;
764 }
765
441b62c1 766 serial = mos7840_get_usb_serial(port, __func__);
3f542974 767 if (!serial) {
50de36f7 768 mos7840_port->read_urb_busy = false;
3f542974
PS		 769 return;
770 }
771
3f542974 772 data = urb->transfer_buffer;
59d33f2f 773 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
3f542974 774
3f542974 775 if (urb->actual_length) {
05c7cd39
JS		 776 struct tty_port *tport = &mos7840_port->port->port;
777 tty = tty_port_tty_get(tport);
3f542974 778 if (tty) {
05c7cd39 779 tty_insert_flip_string(tport, data, urb->actual_length);
3f542974 780 tty_flip_buffer_push(tty);
4a90f09b 781 tty_kref_put(tty);
3f542974
PS		 782 }
783 mos7840_port->icount.rx += urb->actual_length;
0de9a702 784 smp_wmb();
9c134a14 785 dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx);
3f542974
PS		 786 }
787
788 if (!mos7840_port->read_urb) {
9c134a14 789 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
50de36f7 790 mos7840_port->read_urb_busy = false;
3f542974
PS		 791 return;
792 }
793
0eafe4de
D		 794 /* Turn on LED */
795 if (mos7840_port->has_led && !mos7840_port->led_flag) {
796 mos7840_port->led_flag = true;
797 mos7840_set_led_async(mos7840_port, 0x0301,
798 MODEM_CONTROL_REGISTER);
799 mod_timer(&mos7840_port->led_timer1,
800 jiffies + msecs_to_jiffies(LED_ON_MS));
801 }
3f542974 802
50de36f7 803 mos7840_port->read_urb_busy = true;
0643c724 804 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
0de9a702 805
0643c724 806 if (retval) {
9c134a14 807 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
50de36f7 808 mos7840_port->read_urb_busy = false;
3f542974
PS		 809 }
810}
811
812/*****************************************************************************
813 * mos7840_bulk_out_data_callback
880af9db
AC		 814 * this is the callback function for when we have finished sending
815 * serial data on the bulk out endpoint.
3f542974
PS		 816 *****************************************************************************/
817
7d12e780 818static void mos7840_bulk_out_data_callback(struct urb *urb)
3f542974
PS		 819{
820 struct moschip_port *mos7840_port;
9c134a14 821 struct usb_serial_port *port;
3f542974 822 struct tty_struct *tty;
0643c724 823 int status = urb->status;
0de9a702
ON		 824 int i;
825
cdc97792 826 mos7840_port = urb->context;
9c134a14 827 port = mos7840_port->port;
0de9a702
ON		 828 spin_lock(&mos7840_port->pool_lock);
829 for (i = 0; i < NUM_URBS; i++) {
830 if (urb == mos7840_port->write_urb_pool[i]) {
831 mos7840_port->busy[i] = 0;
832 break;
833 }
834 }
835 spin_unlock(&mos7840_port->pool_lock);
836
0643c724 837 if (status) {
9c134a14 838 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
3f542974
PS		 839 return;
840 }
841
9c134a14 842 if (mos7840_port_paranoia_check(port, __func__))
3f542974 843 return;
3f542974 844
9c134a14 845 tty = tty_port_tty_get(&port->port);
b963a844
JS		 846 if (tty && mos7840_port->open)
847 tty_wakeup(tty);
4a90f09b 848 tty_kref_put(tty);
3f542974
PS		 849
850}
851
852/************************************************************************/
853/* 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 */
854/************************************************************************/
855#ifdef MCSSerialProbe
856static int mos7840_serial_probe(struct usb_serial *serial,
857 const struct usb_device_id *id)
858{
859
860 /*need to implement the mode_reg reading and updating\
861 structures usb_serial_ device_type\
862 (i.e num_ports, num_bulkin,bulkout etc) */
863 /* Also we can update the changes attach */
864 return 1;
865}
866#endif
867
868/*****************************************************************************
869 * mos7840_open
870 * this function is called by the tty driver when a port is opened
871 * If successful, we return 0
872 * Otherwise we return a negative error number.
873 *****************************************************************************/
874
a509a7e4 875static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
3f542974
PS		 876{
877 int response;
878 int j;
879 struct usb_serial *serial;
880 struct urb *urb;
881 __u16 Data;
882 int status;
883 struct moschip_port *mos7840_port;
0de9a702 884 struct moschip_port *port0;
3f542974 885
9c134a14 886 if (mos7840_port_paranoia_check(port, __func__))
3f542974 887 return -ENODEV;
3f542974 888
3f542974
PS		 889 serial = port->serial;
890
9c134a14 891 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 892 return -ENODEV;
3f542974
PS		 893
894 mos7840_port = mos7840_get_port_private(port);
0de9a702 895 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 896
0de9a702 897 if (mos7840_port == NULL || port0 == NULL)
3f542974
PS		 898 return -ENODEV;
899
900 usb_clear_halt(serial->dev, port->write_urb->pipe);
901 usb_clear_halt(serial->dev, port->read_urb->pipe);
0de9a702 902 port0->open_ports++;
3f542974
PS		 903
904 /* Initialising the write urb pool */
905 for (j = 0; j < NUM_URBS; ++j) {
0de9a702 906 urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974
PS		 907 mos7840_port->write_urb_pool[j] = urb;
908
909 if (urb == NULL) {
194343d9 910 dev_err(&port->dev, "No more urbs???\n");
3f542974
PS		 911 continue;
912 }
913
880af9db
AC		 914 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
915 GFP_KERNEL);
3f542974 916 if (!urb->transfer_buffer) {
0de9a702
ON		 917 usb_free_urb(urb);
918 mos7840_port->write_urb_pool[j] = NULL;
194343d9
GKH		 919 dev_err(&port->dev,
920 "%s-out of memory for urb buffers.\n",
921 __func__);
3f542974
PS		 922 continue;
923 }
924 }
925
926/*****************************************************************************
927 * Initialize MCS7840 -- Write Init values to corresponding Registers
928 *
929 * Register Index
930 * 1 : IER
931 * 2 : FCR
932 * 3 : LCR
933 * 4 : MCR
934 *
935 * 0x08 : SP1/2 Control Reg
936 *****************************************************************************/
937
880af9db 938 /* NEED to check the following Block */
3f542974 939
3f542974
PS		 940 Data = 0x0;
941 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
942 if (status < 0) {
9c134a14 943 dev_dbg(&port->dev, "Reading Spreg failed\n");
3f542974
PS		 944 return -1;
945 }
946 Data |= 0x80;
947 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
948 if (status < 0) {
9c134a14 949 dev_dbg(&port->dev, "writing Spreg failed\n");
3f542974
PS		 950 return -1;
951 }
952
953 Data &= ~0x80;
954 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
955 if (status < 0) {
9c134a14 956 dev_dbg(&port->dev, "writing Spreg failed\n");
3f542974
PS		 957 return -1;
958 }
880af9db 959 /* End of block to be checked */
3f542974 960
3f542974 961 Data = 0x0;
880af9db
AC		 962 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
963 &Data);
3f542974 964 if (status < 0) {
9c134a14 965 dev_dbg(&port->dev, "Reading Controlreg failed\n");
3f542974
PS		 966 return -1;
967 }
880af9db
AC		 968 Data |= 0x08; /* Driver done bit */
969 Data |= 0x20; /* rx_disable */
970 status = mos7840_set_reg_sync(port,
971 mos7840_port->ControlRegOffset, Data);
3f542974 972 if (status < 0) {
9c134a14 973 dev_dbg(&port->dev, "writing Controlreg failed\n");
3f542974
PS		 974 return -1;
975 }
880af9db
AC		 976 /* do register settings here */
977 /* Set all regs to the device default values. */
978 /***********************************
979 * First Disable all interrupts.
980 ***********************************/
3f542974 981 Data = 0x00;
3f542974
PS		 982 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
983 if (status < 0) {
9c134a14 984 dev_dbg(&port->dev, "disabling interrupts failed\n");
3f542974
PS		 985 return -1;
986 }
880af9db 987 /* Set FIFO_CONTROL_REGISTER to the default value */
3f542974 988 Data = 0x00;
3f542974
PS		 989 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
990 if (status < 0) {
9c134a14 991 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
3f542974
PS		 992 return -1;
993 }
994
995 Data = 0xcf;
3f542974
PS		 996 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
997 if (status < 0) {
9c134a14 998 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
3f542974
PS		 999 return -1;
1000 }
1001
1002 Data = 0x03;
3f542974
PS		 1003 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1004 mos7840_port->shadowLCR = Data;
1005
1006 Data = 0x0b;
3f542974
PS		 1007 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1008 mos7840_port->shadowMCR = Data;
1009
1010 Data = 0x00;
3f542974
PS		 1011 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1012 mos7840_port->shadowLCR = Data;
1013
880af9db 1014 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1015 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1016
1017 Data = 0x0c;
3f542974
PS		 1018 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1019
1020 Data = 0x0;
3f542974
PS		 1021 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1022
1023 Data = 0x00;
3f542974
PS		 1024 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1025
1026 Data = Data & ~SERIAL_LCR_DLAB;
3f542974
PS		 1027 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1028 mos7840_port->shadowLCR = Data;
1029
880af9db 1030 /* clearing Bulkin and Bulkout Fifo */
3f542974 1031 Data = 0x0;
3f542974
PS		 1032 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1033
1034 Data = Data | 0x0c;
3f542974
PS		 1035 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1036
1037 Data = Data & ~0x0c;
3f542974 1038 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
880af9db 1039 /* Finally enable all interrupts */
3f542974 1040 Data = 0x0c;
3f542974
PS		 1041 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1042
880af9db 1043 /* clearing rx_disable */
3f542974 1044 Data = 0x0;
880af9db
AC		 1045 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1046 &Data);
3f542974 1047 Data = Data & ~0x20;
880af9db
AC		 1048 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1049 Data);
3f542974 1050
880af9db 1051 /* rx_negate */
3f542974 1052 Data = 0x0;
880af9db
AC		 1053 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1054 &Data);
3f542974 1055 Data = Data | 0x10;
880af9db
AC		 1056 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1057 Data);
3f542974 1058
880af9db
AC		 1059 /* Check to see if we've set up our endpoint info yet *
1060 * (can't set it up in mos7840_startup as the structures *
1061 * were not set up at that time.) */
0de9a702 1062 if (port0->open_ports == 1) {
3f542974 1063 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1064 /* set up interrupt urb */
3f542974 1065 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1066 serial->dev,
1067 usb_rcvintpipe(serial->dev,
1068 serial->port[0]->interrupt_in_endpointAddress),
1069 serial->port[0]->interrupt_in_buffer,
1070 serial->port[0]->interrupt_in_urb->
1071 transfer_buffer_length,
1072 mos7840_interrupt_callback,
1073 serial,
1074 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1075
1076 /* start interrupt read for mos7840 *
1077 * will continue as long as mos7840 is connected */
1078
1079 response =
1080 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1081 GFP_KERNEL);
1082 if (response) {
194343d9
GKH		 1083 dev_err(&port->dev, "%s - Error %d submitting "
1084 "interrupt urb\n", __func__, response);
3f542974
PS		 1085 }
1086
1087 }
1088
1089 }
1090
1091 /* see if we've set up our endpoint info yet *
1092 * (can't set it up in mos7840_startup as the *
1093 * structures were not set up at that time.) */
1094
9c134a14
GKH		 1095 dev_dbg(&port->dev, "port number is %d\n", port->number);
1096 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor);
1097 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1098 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1099 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1100 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
3f542974
PS		 1101 mos7840_port->read_urb = port->read_urb;
1102
1103 /* set up our bulk in urb */
093ea2d3
DL		 1104 if ((serial->num_ports == 2)
1105 && ((((__u16)port->number -
1106 (__u16)(port->serial->minor)) % 2) != 0)) {
1107 usb_fill_bulk_urb(mos7840_port->read_urb,
1108 serial->dev,
1109 usb_rcvbulkpipe(serial->dev,
1110 (port->bulk_in_endpointAddress) + 2),
1111 port->bulk_in_buffer,
1112 mos7840_port->read_urb->transfer_buffer_length,
1113 mos7840_bulk_in_callback, mos7840_port);
1114 } else {
1115 usb_fill_bulk_urb(mos7840_port->read_urb,
1116 serial->dev,
1117 usb_rcvbulkpipe(serial->dev,
1118 port->bulk_in_endpointAddress),
1119 port->bulk_in_buffer,
1120 mos7840_port->read_urb->transfer_buffer_length,
1121 mos7840_bulk_in_callback, mos7840_port);
1122 }
3f542974 1123
9c134a14 1124 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
50de36f7 1125 mos7840_port->read_urb_busy = true;
3f542974
PS		 1126 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1127 if (response) {
194343d9
GKH		 1128 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1129 __func__, response);
50de36f7 1130 mos7840_port->read_urb_busy = false;
3f542974
PS		 1131 }
1132
1133 /* initialize our wait queues */
1134 init_waitqueue_head(&mos7840_port->wait_chase);
1135 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1136
1137 /* initialize our icount structure */
1138 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1139
1140 /* initialize our port settings */
880af9db
AC		 1141 /* Must set to enable ints! */
1142 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1143 /* send a open port command */
1144 mos7840_port->open = 1;
880af9db 1145 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974
PS		 1146 mos7840_port->icount.tx = 0;
1147 mos7840_port->icount.rx = 0;
1148
3f542974 1149 return 0;
3f542974
PS		 1150}
1151
1152/*****************************************************************************
1153 * mos7840_chars_in_buffer
1154 * this function is called by the tty driver when it wants to know how many
1155 * bytes of data we currently have outstanding in the port (data that has
1156 * been written, but hasn't made it out the port yet)
1157 * If successful, we return the number of bytes left to be written in the
1158 * system,
95da310e 1159 * Otherwise we return zero.
3f542974
PS		 1160 *****************************************************************************/
1161
95da310e 1162static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1163{
95da310e 1164 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1165 int i;
1166 int chars = 0;
0de9a702 1167 unsigned long flags;
3f542974
PS		 1168 struct moschip_port *mos7840_port;
1169
9c134a14 1170 if (mos7840_port_paranoia_check(port, __func__))
95da310e 1171 return 0;
3f542974
PS		 1172
1173 mos7840_port = mos7840_get_port_private(port);
3363155b 1174 if (mos7840_port == NULL)
95da310e 1175 return 0;
3f542974 1176
880af9db 1177 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
5c263b92
MF		 1178 for (i = 0; i < NUM_URBS; ++i) {
1179 if (mos7840_port->busy[i]) {
1180 struct urb *urb = mos7840_port->write_urb_pool[i];
1181 chars += urb->transfer_buffer_length;
1182 }
1183 }
880af9db 1184 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
9c134a14 1185 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
0de9a702 1186 return chars;
3f542974
PS		 1187
1188}
1189
3f542974
PS		 1190/*****************************************************************************
1191 * mos7840_close
1192 * this function is called by the tty driver when a port is closed
1193 *****************************************************************************/
1194
335f8514 1195static void mos7840_close(struct usb_serial_port *port)
3f542974
PS		 1196{
1197 struct usb_serial *serial;
1198 struct moschip_port *mos7840_port;
0de9a702 1199 struct moschip_port *port0;
3f542974
PS		 1200 int j;
1201 __u16 Data;
1202
9c134a14 1203 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1204 return;
3f542974 1205
441b62c1 1206 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1207 if (!serial)
3f542974 1208 return;
3f542974
PS		 1209
1210 mos7840_port = mos7840_get_port_private(port);
0de9a702 1211 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1212
0de9a702 1213 if (mos7840_port == NULL || port0 == NULL)
3f542974 1214 return;
3f542974
PS		 1215
1216 for (j = 0; j < NUM_URBS; ++j)
1217 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1218
1219 /* Freeing Write URBs */
1220 for (j = 0; j < NUM_URBS; ++j) {
1221 if (mos7840_port->write_urb_pool[j]) {
1222 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1223 kfree(mos7840_port->write_urb_pool[j]->
1224 transfer_buffer);
1225
1226 usb_free_urb(mos7840_port->write_urb_pool[j]);
1227 }
1228 }
1229
3f542974
PS		 1230 /* While closing port, shutdown all bulk read, write *
1231 * and interrupt read if they exists */
1232 if (serial->dev) {
3f542974 1233 if (mos7840_port->write_urb) {
9c134a14 1234 dev_dbg(&port->dev, "%s", "Shutdown bulk write\n");
3f542974
PS		 1235 usb_kill_urb(mos7840_port->write_urb);
1236 }
3f542974 1237 if (mos7840_port->read_urb) {
9c134a14 1238 dev_dbg(&port->dev, "%s", "Shutdown bulk read\n");
3f542974 1239 usb_kill_urb(mos7840_port->read_urb);
50de36f7 1240 mos7840_port->read_urb_busy = false;
3f542974
PS		 1241 }
1242 if ((&mos7840_port->control_urb)) {
9c134a14 1243 dev_dbg(&port->dev, "%s", "Shutdown control read\n");
880af9db 1244 /*/ usb_kill_urb (mos7840_port->control_urb); */
3f542974
PS		 1245 }
1246 }
880af9db
AC		 1247/* if(mos7840_port->ctrl_buf != NULL) */
1248/* kfree(mos7840_port->ctrl_buf); */
0de9a702 1249 port0->open_ports--;
9c134a14 1250 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number);
0de9a702 1251 if (port0->open_ports == 0) {
3f542974 1252 if (serial->port[0]->interrupt_in_urb) {
9c134a14 1253 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
0de9a702 1254 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1255 }
1256 }
1257
1258 if (mos7840_port->write_urb) {
1259 /* if this urb had a transfer buffer already (old tx) free it */
880af9db 1260 if (mos7840_port->write_urb->transfer_buffer != NULL)
3f542974 1261 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1262 usb_free_urb(mos7840_port->write_urb);
1263 }
1264
1265 Data = 0x0;
1266 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1267
1268 Data = 0x00;
1269 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1270
1271 mos7840_port->open = 0;
3f542974
PS		 1272}
1273
1274/************************************************************************
1275 *
1276 * mos7840_block_until_chase_response
1277 *
1278 * This function will block the close until one of the following:
1279 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1280 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1281 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1282 *
1283 ************************************************************************/
1284
95da310e
AC		 1285static void mos7840_block_until_chase_response(struct tty_struct *tty,
1286 struct moschip_port *mos7840_port)
3f542974 1287{
1e658489 1288 int timeout = msecs_to_jiffies(1000);
3f542974
PS		 1289 int wait = 10;
1290 int count;
1291
1292 while (1) {
95da310e 1293 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1294
1295 /* Check for Buffer status */
880af9db 1296 if (count <= 0)
3f542974 1297 return;
3f542974
PS		 1298
1299 /* Block the thread for a while */
1300 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1301 timeout);
1302 /* No activity.. count down section */
1303 wait--;
1304 if (wait == 0) {
9c134a14 1305 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__);
3f542974
PS		 1306 return;
1307 } else {
dc0d5c1e 1308 /* Reset timeout value back to seconds */
3f542974
PS		 1309 wait = 10;
1310 }
1311 }
1312
1313}
1314
1315/*****************************************************************************
1316 * mos7840_break
1317 * this function sends a break to the port
1318 *****************************************************************************/
95da310e 1319static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1320{
95da310e 1321 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1322 unsigned char data;
1323 struct usb_serial *serial;
1324 struct moschip_port *mos7840_port;
1325
9c134a14 1326 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1327 return;
3f542974 1328
441b62c1 1329 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1330 if (!serial)
3f542974 1331 return;
3f542974
PS		 1332
1333 mos7840_port = mos7840_get_port_private(port);
1334
880af9db 1335 if (mos7840_port == NULL)
3f542974 1336 return;
3f542974 1337
95da310e 1338 if (serial->dev)
3f542974 1339 /* flush and block until tx is empty */
95da310e 1340 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1341
95da310e 1342 if (break_state == -1)
3f542974 1343 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1344 else
3f542974 1345 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974 1346
6b447f04 1347 /* FIXME: no locking on shadowLCR anywhere in driver */
3f542974 1348 mos7840_port->shadowLCR = data;
9c134a14 1349 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1350 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1351 mos7840_port->shadowLCR);
3f542974
PS		 1352}
1353
1354/*****************************************************************************
1355 * mos7840_write_room
1356 * this function is called by the tty driver when it wants to know how many
1357 * bytes of data we can accept for a specific port.
1358 * If successful, we return the amount of room that we have for this port
1359 * Otherwise we return a negative error number.
1360 *****************************************************************************/
1361
95da310e 1362static int mos7840_write_room(struct tty_struct *tty)
3f542974 1363{
95da310e 1364 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1365 int i;
1366 int room = 0;
0de9a702 1367 unsigned long flags;
3f542974
PS		 1368 struct moschip_port *mos7840_port;
1369
9c134a14 1370 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1371 return -1;
3f542974
PS		 1372
1373 mos7840_port = mos7840_get_port_private(port);
9c134a14 1374 if (mos7840_port == NULL)
3f542974 1375 return -1;
3f542974 1376
0de9a702 1377 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1378 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1379 if (!mos7840_port->busy[i])
3f542974 1380 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1381 }
0de9a702 1382 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1383
0de9a702 1384 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
9c134a14 1385 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
0de9a702 1386 return room;
3f542974
PS		 1387
1388}
1389
1390/*****************************************************************************
1391 * mos7840_write
1392 * this function is called by the tty driver when data should be written to
1393 * the port.
1394 * If successful, we return the number of bytes written, otherwise we
1395 * return a negative error number.
1396 *****************************************************************************/
1397
95da310e 1398static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1399 const unsigned char *data, int count)
1400{
1401 int status;
1402 int i;
1403 int bytes_sent = 0;
1404 int transfer_size;
0de9a702 1405 unsigned long flags;
3f542974
PS		 1406
1407 struct moschip_port *mos7840_port;
1408 struct usb_serial *serial;
1409 struct urb *urb;
880af9db 1410 /* __u16 Data; */
3f542974
PS		 1411 const unsigned char *current_position = data;
1412 unsigned char *data1;
3f542974
PS		 1413
1414#ifdef NOTMOS7840
1415 Data = 0x00;
3f542974
PS		 1416 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1417 mos7840_port->shadowLCR = Data;
9c134a14
GKH		 1418 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1419 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974 1420
880af9db
AC		 1421 /* Data = 0x03; */
1422 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1423 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1424
880af9db 1425 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1426 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1427
880af9db
AC		 1428 /* Data = 0x0c; */
1429 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1430 Data = 0x00;
3f542974 1431 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
9c134a14 1432 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
3f542974
PS		 1433
1434 Data = 0x0;
3f542974 1435 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
9c134a14 1436 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
3f542974
PS		 1437
1438 Data = Data & ~SERIAL_LCR_DLAB;
9c134a14 1439 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1440 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1441#endif
1442
9c134a14 1443 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1444 return -1;
3f542974
PS		 1445
1446 serial = port->serial;
9c134a14 1447 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 1448 return -1;
3f542974
PS		 1449
1450 mos7840_port = mos7840_get_port_private(port);
9c134a14 1451 if (mos7840_port == NULL)
3f542974 1452 return -1;
3f542974
PS		 1453
1454 /* try to find a free urb in the list */
1455 urb = NULL;
1456
0de9a702 1457 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1458 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1459 if (!mos7840_port->busy[i]) {
1460 mos7840_port->busy[i] = 1;
3f542974 1461 urb = mos7840_port->write_urb_pool[i];
9c134a14 1462 dev_dbg(&port->dev, "URB:%d\n", i);
3f542974
PS		 1463 break;
1464 }
1465 }
0de9a702 1466 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1467
1468 if (urb == NULL) {
9c134a14 1469 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
3f542974
PS		 1470 goto exit;
1471 }
1472
1473 if (urb->transfer_buffer == NULL) {
1474 urb->transfer_buffer =
1475 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1476
1477 if (urb->transfer_buffer == NULL) {
22a416c4 1478 dev_err_console(port, "%s no more kernel memory...\n",
194343d9 1479 __func__);
3f542974
PS		 1480 goto exit;
1481 }
1482 }
1483 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1484
97c4965d 1485 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1486
1487 /* fill urb with data and submit */
093ea2d3
DL		 1488 if ((serial->num_ports == 2)
1489 && ((((__u16)port->number -
1490 (__u16)(port->serial->minor)) % 2) != 0)) {
1491 usb_fill_bulk_urb(urb,
1492 serial->dev,
1493 usb_sndbulkpipe(serial->dev,
1494 (port->bulk_out_endpointAddress) + 2),
1495 urb->transfer_buffer,
1496 transfer_size,
1497 mos7840_bulk_out_data_callback, mos7840_port);
1498 } else {
1499 usb_fill_bulk_urb(urb,
1500 serial->dev,
1501 usb_sndbulkpipe(serial->dev,
1502 port->bulk_out_endpointAddress),
1503 urb->transfer_buffer,
1504 transfer_size,
1505 mos7840_bulk_out_data_callback, mos7840_port);
1506 }
3f542974
PS		 1507
1508 data1 = urb->transfer_buffer;
9c134a14 1509 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
3f542974 1510
0eafe4de
D		 1511 /* Turn on LED */
1512 if (mos7840_port->has_led && !mos7840_port->led_flag) {
1513 mos7840_port->led_flag = true;
1514 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);
1515 mod_timer(&mos7840_port->led_timer1,
1516 jiffies + msecs_to_jiffies(LED_ON_MS));
1517 }
1518
3f542974
PS		 1519 /* send it down the pipe */
1520 status = usb_submit_urb(urb, GFP_ATOMIC);
1521
1522 if (status) {
0de9a702 1523 mos7840_port->busy[i] = 0;
22a416c4 1524 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
194343d9 1525 "with status = %d\n", __func__, status);
3f542974
PS		 1526 bytes_sent = status;
1527 goto exit;
1528 }
1529 bytes_sent = transfer_size;
1530 mos7840_port->icount.tx += transfer_size;
0de9a702 1531 smp_wmb();
9c134a14 1532 dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
95da310e 1533exit:
3f542974
PS		 1534 return bytes_sent;
1535
1536}
1537
1538/*****************************************************************************
1539 * mos7840_throttle
1540 * this function is called by the tty driver when it wants to stop the data
1541 * being read from the port.
1542 *****************************************************************************/
1543
95da310e 1544static void mos7840_throttle(struct tty_struct *tty)
3f542974 1545{
95da310e 1546 struct usb_serial_port *port = tty->driver_data;
3f542974 1547 struct moschip_port *mos7840_port;
3f542974
PS		 1548 int status;
1549
9c134a14 1550 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1551 return;
3f542974
PS		 1552
1553 mos7840_port = mos7840_get_port_private(port);
1554
1555 if (mos7840_port == NULL)
1556 return;
1557
1558 if (!mos7840_port->open) {
9c134a14 1559 dev_dbg(&port->dev, "%s", "port not opened\n");
3f542974
PS		 1560 return;
1561 }
1562
3f542974
PS		 1563 /* if we are implementing XON/XOFF, send the stop character */
1564 if (I_IXOFF(tty)) {
1565 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1566 status = mos7840_write(tty, port, &stop_char, 1);
1567 if (status <= 0)
3f542974 1568 return;
3f542974 1569 }
3f542974 1570 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1571 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1572 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1573 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1574 mos7840_port->shadowMCR);
95da310e 1575 if (status < 0)
3f542974 1576 return;
3f542974 1577 }
3f542974
PS		 1578}
1579
1580/*****************************************************************************
1581 * mos7840_unthrottle
880af9db
AC		 1582 * this function is called by the tty driver when it wants to resume
1583 * the data being read from the port (called after mos7840_throttle is
1584 * called)
3f542974 1585 *****************************************************************************/
95da310e 1586static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1587{
95da310e 1588 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1589 int status;
1590 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1591
9c134a14 1592 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1593 return;
3f542974
PS		 1594
1595 if (mos7840_port == NULL)
1596 return;
1597
1598 if (!mos7840_port->open) {
9c134a14 1599 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1600 return;
1601 }
1602
3f542974
PS		 1603 /* if we are implementing XON/XOFF, send the start character */
1604 if (I_IXOFF(tty)) {
1605 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1606 status = mos7840_write(tty, port, &start_char, 1);
1607 if (status <= 0)
3f542974 1608 return;
3f542974
PS		 1609 }
1610
1611 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1612 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1613 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1614 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1615 mos7840_port->shadowMCR);
95da310e 1616 if (status < 0)
3f542974 1617 return;
3f542974 1618 }
3f542974
PS		 1619}
1620
60b33c13 1621static int mos7840_tiocmget(struct tty_struct *tty)
3f542974 1622{
95da310e 1623 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1624 struct moschip_port *mos7840_port;
1625 unsigned int result;
1626 __u16 msr;
1627 __u16 mcr;
880af9db 1628 int status;
3f542974
PS		 1629 mos7840_port = mos7840_get_port_private(port);
1630
3f542974
PS		 1631 if (mos7840_port == NULL)
1632 return -ENODEV;
1633
1634 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1635 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1636 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1637 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1638 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1639 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1640 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1641 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1642 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1643
9c134a14 1644 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
3f542974
PS		 1645
1646 return result;
1647}
1648
20b9d177 1649static int mos7840_tiocmset(struct tty_struct *tty,
3f542974
PS		 1650 unsigned int set, unsigned int clear)
1651{
95da310e 1652 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1653 struct moschip_port *mos7840_port;
1654 unsigned int mcr;
87521c46 1655 int status;
3f542974 1656
3f542974
PS		 1657 mos7840_port = mos7840_get_port_private(port);
1658
1659 if (mos7840_port == NULL)
1660 return -ENODEV;
1661
e2984494 1662 /* FIXME: What locks the port registers ? */
3f542974
PS		 1663 mcr = mos7840_port->shadowMCR;
1664 if (clear & TIOCM_RTS)
1665 mcr &= ~MCR_RTS;
1666 if (clear & TIOCM_DTR)
1667 mcr &= ~MCR_DTR;
1668 if (clear & TIOCM_LOOP)
1669 mcr &= ~MCR_LOOPBACK;
1670
1671 if (set & TIOCM_RTS)
1672 mcr |= MCR_RTS;
1673 if (set & TIOCM_DTR)
1674 mcr |= MCR_DTR;
1675 if (set & TIOCM_LOOP)
1676 mcr |= MCR_LOOPBACK;
1677
1678 mos7840_port->shadowMCR = mcr;
1679
3f542974
PS		 1680 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1681 if (status < 0) {
9c134a14 1682 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
87521c46 1683 return status;
3f542974
PS		 1684 }
1685
1686 return 0;
1687}
1688
1689/*****************************************************************************
1690 * mos7840_calc_baud_rate_divisor
1691 * this function calculates the proper baud rate divisor for the specified
1692 * baud rate.
1693 *****************************************************************************/
9c134a14
GKH		 1694static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1695 int baudRate, int *divisor,
880af9db 1696 __u16 *clk_sel_val)
3f542974 1697{
9c134a14 1698 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
3f542974
PS		 1699
1700 if (baudRate <= 115200) {
1701 *divisor = 115200 / baudRate;
1702 *clk_sel_val = 0x0;
1703 }
1704 if ((baudRate > 115200) && (baudRate <= 230400)) {
1705 *divisor = 230400 / baudRate;
1706 *clk_sel_val = 0x10;
1707 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1708 *divisor = 403200 / baudRate;
1709 *clk_sel_val = 0x20;
1710 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1711 *divisor = 460800 / baudRate;
1712 *clk_sel_val = 0x30;
1713 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1714 *divisor = 806400 / baudRate;
1715 *clk_sel_val = 0x40;
1716 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1717 *divisor = 921600 / baudRate;
1718 *clk_sel_val = 0x50;
1719 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1720 *divisor = 1572864 / baudRate;
1721 *clk_sel_val = 0x60;
1722 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1723 *divisor = 3145728 / baudRate;
1724 *clk_sel_val = 0x70;
1725 }
1726 return 0;
1727
1728#ifdef NOTMCS7840
1729
1730 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1731 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1732 *divisor = mos7840_divisor_table[i].Divisor;
1733 return 0;
1734 }
1735 }
1736
1737 /* After trying for all the standard baud rates *
1738 * Try calculating the divisor for this baud rate */
1739
1740 if (baudrate > 75 && baudrate < 230400) {
1741 /* get the divisor */
1742 custom = (__u16) (230400L / baudrate);
1743
1744 /* Check for round off */
1745 round1 = (__u16) (2304000L / baudrate);
1746 round = (__u16) (round1 - (custom * 10));
880af9db 1747 if (round > 4)
3f542974 1748 custom++;
3f542974
PS		 1749 *divisor = custom;
1750
9c134a14 1751 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
3f542974
PS		 1752 return 0;
1753 }
1754
9c134a14 1755 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
3f542974
PS		 1756 return -1;
1757#endif
1758}
1759
1760/*****************************************************************************
1761 * mos7840_send_cmd_write_baud_rate
1762 * this function sends the proper command to change the baud rate of the
1763 * specified port.
1764 *****************************************************************************/
1765
1766static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1767 int baudRate)
1768{
1769 int divisor = 0;
1770 int status;
1771 __u16 Data;
1772 unsigned char number;
1773 __u16 clk_sel_val;
1774 struct usb_serial_port *port;
1775
1776 if (mos7840_port == NULL)
1777 return -1;
1778
9c134a14
GKH		 1779 port = mos7840_port->port;
1780 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1781 return -1;
3f542974 1782
9c134a14 1783 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1784 return -1;
3f542974 1785
3f542974
PS		 1786 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1787
9c134a14
GKH		 1788 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__,
1789 mos7840_port->port->number, baudRate);
880af9db 1790 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1791 if (baudRate > 115200) {
1792#ifdef HW_flow_control
880af9db
AC		 1793 /* NOTE: need to see the pther register to modify */
1794 /* setting h/w flow control bit to 1 */
3f542974
PS		 1795 Data = 0x2b;
1796 mos7840_port->shadowMCR = Data;
880af9db
AC		 1797 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1798 Data);
3f542974 1799 if (status < 0) {
9c134a14 1800 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1801 return -1;
1802 }
1803#endif
1804
1805 } else {
1806#ifdef HW_flow_control
093ea2d3 1807 /* setting h/w flow control bit to 0 */
3f542974
PS		 1808 Data = 0xb;
1809 mos7840_port->shadowMCR = Data;
880af9db
AC		 1810 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1811 Data);
3f542974 1812 if (status < 0) {
9c134a14 1813 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1814 return -1;
1815 }
1816#endif
1817
1818 }
1819
880af9db 1820 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1821 clk_sel_val = 0x0;
1822 Data = 0x0;
9c134a14 1823 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
3f542974 1824 &clk_sel_val);
880af9db
AC		 1825 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1826 &Data);
3f542974 1827 if (status < 0) {
9c134a14 1828 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
3f542974
PS		 1829 return -1;
1830 }
1831 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1832 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1833 Data);
3f542974 1834 if (status < 0) {
9c134a14 1835 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1836 return -1;
1837 }
1838 /* Calculate the Divisor */
1839
1840 if (status) {
194343d9 1841 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1842 return status;
1843 }
1844 /* Enable access to divisor latch */
1845 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1846 mos7840_port->shadowLCR = Data;
1847 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1848
1849 /* Write the divisor */
1850 Data = (unsigned char)(divisor & 0xff);
9c134a14 1851 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
3f542974
PS		 1852 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1853
1854 Data = (unsigned char)((divisor & 0xff00) >> 8);
9c134a14 1855 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
3f542974
PS		 1856 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1857
1858 /* Disable access to divisor latch */
1859 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1860 mos7840_port->shadowLCR = Data;
1861 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1862
1863 }
3f542974
PS		 1864 return status;
1865}
1866
1867/*****************************************************************************
1868 * mos7840_change_port_settings
1869 * This routine is called to set the UART on the device to match
1870 * the specified new settings.
1871 *****************************************************************************/
1872
95da310e
AC		 1873static void mos7840_change_port_settings(struct tty_struct *tty,
1874 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1875{
3f542974
PS		 1876 int baud;
1877 unsigned cflag;
1878 unsigned iflag;
1879 __u8 lData;
1880 __u8 lParity;
1881 __u8 lStop;
1882 int status;
1883 __u16 Data;
1884 struct usb_serial_port *port;
1885 struct usb_serial *serial;
1886
1887 if (mos7840_port == NULL)
1888 return;
1889
9c134a14 1890 port = mos7840_port->port;
3f542974 1891
9c134a14 1892 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1893 return;
3f542974 1894
9c134a14 1895 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1896 return;
3f542974
PS		 1897
1898 serial = port->serial;
1899
3f542974 1900 if (!mos7840_port->open) {
9c134a14 1901 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1902 return;
1903 }
1904
3f542974
PS		 1905 lData = LCR_BITS_8;
1906 lStop = LCR_STOP_1;
1907 lParity = LCR_PAR_NONE;
1908
adc8d746
AC		 1909 cflag = tty->termios.c_cflag;
1910 iflag = tty->termios.c_iflag;
3f542974
PS		 1911
1912 /* Change the number of bits */
1913 if (cflag & CSIZE) {
1914 switch (cflag & CSIZE) {
1915 case CS5:
1916 lData = LCR_BITS_5;
1917 break;
1918
1919 case CS6:
1920 lData = LCR_BITS_6;
1921 break;
1922
1923 case CS7:
1924 lData = LCR_BITS_7;
1925 break;
1926 default:
1927 case CS8:
1928 lData = LCR_BITS_8;
1929 break;
1930 }
1931 }
1932 /* Change the Parity bit */
1933 if (cflag & PARENB) {
1934 if (cflag & PARODD) {
1935 lParity = LCR_PAR_ODD;
9c134a14 1936 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
3f542974
PS		 1937 } else {
1938 lParity = LCR_PAR_EVEN;
9c134a14 1939 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
3f542974
PS		 1940 }
1941
1942 } else {
9c134a14 1943 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
3f542974
PS		 1944 }
1945
880af9db 1946 if (cflag & CMSPAR)
3f542974 1947 lParity = lParity | 0x20;
3f542974
PS		 1948
1949 /* Change the Stop bit */
1950 if (cflag & CSTOPB) {
1951 lStop = LCR_STOP_2;
9c134a14 1952 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
3f542974
PS		 1953 } else {
1954 lStop = LCR_STOP_1;
9c134a14 1955 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
3f542974
PS		 1956 }
1957
1958 /* Update the LCR with the correct value */
1959 mos7840_port->shadowLCR &=
1960 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1961 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1962
9c134a14
GKH		 1963 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1964 mos7840_port->shadowLCR);
3f542974
PS		 1965 /* Disable Interrupts */
1966 Data = 0x00;
1967 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1968
1969 Data = 0x00;
1970 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1971
1972 Data = 0xcf;
1973 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1974
1975 /* Send the updated LCR value to the mos7840 */
1976 Data = mos7840_port->shadowLCR;
1977
1978 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1979
1980 Data = 0x00b;
1981 mos7840_port->shadowMCR = Data;
1982 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1983 Data = 0x00b;
1984 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1985
1986 /* set up the MCR register and send it to the mos7840 */
1987
1988 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 1989 if (cflag & CBAUD)
3f542974 1990 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 1991
880af9db 1992 if (cflag & CRTSCTS)
3f542974 1993 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 1994 else
3f542974 1995 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 1996
1997 Data = mos7840_port->shadowMCR;
1998 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1999
2000 /* Determine divisor based on baud rate */
2001 baud = tty_get_baud_rate(tty);
2002
2003 if (!baud) {
2004 /* pick a default, any default... */
9c134a14 2005 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
3f542974
PS		 2006 baud = 9600;
2007 }
2008
9c134a14 2009 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
3f542974
PS		 2010 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2011
2012 /* Enable Interrupts */
2013 Data = 0x0c;
2014 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2015
50de36f7 2016 if (mos7840_port->read_urb_busy == false) {
50de36f7 2017 mos7840_port->read_urb_busy = true;
3f542974 2018 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
3f542974 2019 if (status) {
9c134a14 2020 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 2021 status);
50de36f7 2022 mos7840_port->read_urb_busy = false;
3f542974
PS		 2023 }
2024 }
2025 wake_up(&mos7840_port->delta_msr_wait);
2026 mos7840_port->delta_msr_cond = 1;
9c134a14
GKH		 2027 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
2028 mos7840_port->shadowLCR);
3f542974
PS		 2029}
2030
2031/*****************************************************************************
2032 * mos7840_set_termios
2033 * this function is called by the tty driver when it wants to change
2034 * the termios structure
2035 *****************************************************************************/
2036
95da310e
AC		 2037static void mos7840_set_termios(struct tty_struct *tty,
2038 struct usb_serial_port *port,
606d099c 2039 struct ktermios *old_termios)
3f542974
PS		 2040{
2041 int status;
2042 unsigned int cflag;
2043 struct usb_serial *serial;
2044 struct moschip_port *mos7840_port;
3363155b 2045
9c134a14 2046 if (mos7840_port_paranoia_check(port, __func__))
3f542974 2047 return;
3f542974
PS		 2048
2049 serial = port->serial;
2050
9c134a14 2051 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 2052 return;
3f542974
PS		 2053
2054 mos7840_port = mos7840_get_port_private(port);
2055
2056 if (mos7840_port == NULL)
2057 return;
2058
3f542974 2059 if (!mos7840_port->open) {
9c134a14 2060 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 2061 return;
2062 }
2063
9c134a14 2064 dev_dbg(&port->dev, "%s", "setting termios - \n");
3f542974 2065
adc8d746 2066 cflag = tty->termios.c_cflag;
3f542974 2067
9c134a14 2068 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
d9a80746 2069 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
9c134a14
GKH		 2070 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2071 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2072 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
3f542974
PS		 2073
2074 /* change the port settings to the new ones specified */
2075
95da310e 2076 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2077
2078 if (!mos7840_port->read_urb) {
9c134a14 2079 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
3f542974
PS		 2080 return;
2081 }
2082
50de36f7 2083 if (mos7840_port->read_urb_busy == false) {
50de36f7 2084 mos7840_port->read_urb_busy = true;
3f542974
PS		 2085 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2086 if (status) {
9c134a14 2087 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 2088 status);
50de36f7 2089 mos7840_port->read_urb_busy = false;
3f542974
PS		 2090 }
2091 }
3f542974
PS		 2092}
2093
2094/*****************************************************************************
2095 * mos7840_get_lsr_info - get line status register info
2096 *
2097 * Purpose: Let user call ioctl() to get info when the UART physically
2098 * is emptied. On bus types like RS485, the transmitter must
2099 * release the bus after transmitting. This must be done when
2100 * the transmit shift register is empty, not be done when the
2101 * transmit holding register is empty. This functionality
2102 * allows an RS485 driver to be written in user space.
2103 *****************************************************************************/
2104
95da310e 2105static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2106 unsigned int __user *value)
3f542974
PS		 2107{
2108 int count;
2109 unsigned int result = 0;
2110
95da310e 2111 count = mos7840_chars_in_buffer(tty);
9c134a14 2112 if (count == 0)
3f542974 2113 result = TIOCSER_TEMT;
3f542974
PS		 2114
2115 if (copy_to_user(value, &result, sizeof(int)))
2116 return -EFAULT;
2117 return 0;
2118}
2119
3f542974
PS		 2120/*****************************************************************************
2121 * mos7840_get_serial_info
2122 * function to get information about serial port
2123 *****************************************************************************/
2124
2125static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2126 struct serial_struct __user *retinfo)
3f542974
PS		 2127{
2128 struct serial_struct tmp;
2129
2130 if (mos7840_port == NULL)
2131 return -1;
2132
2133 if (!retinfo)
2134 return -EFAULT;
2135
2136 memset(&tmp, 0, sizeof(tmp));
2137
2138 tmp.type = PORT_16550A;
2139 tmp.line = mos7840_port->port->serial->minor;
2140 tmp.port = mos7840_port->port->number;
2141 tmp.irq = 0;
2142 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2143 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2144 tmp.baud_base = 9600;
2145 tmp.close_delay = 5 * HZ;
2146 tmp.closing_wait = 30 * HZ;
2147
2148 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2149 return -EFAULT;
2150 return 0;
2151}
2152
0bca1b91
AC		 2153static int mos7840_get_icount(struct tty_struct *tty,
2154 struct serial_icounter_struct *icount)
2155{
2156 struct usb_serial_port *port = tty->driver_data;
2157 struct moschip_port *mos7840_port;
2158 struct async_icount cnow;
2159
2160 mos7840_port = mos7840_get_port_private(port);
2161 cnow = mos7840_port->icount;
2162
2163 smp_rmb();
2164 icount->cts = cnow.cts;
2165 icount->dsr = cnow.dsr;
2166 icount->rng = cnow.rng;
2167 icount->dcd = cnow.dcd;
2168 icount->rx = cnow.rx;
2169 icount->tx = cnow.tx;
2170 icount->frame = cnow.frame;
2171 icount->overrun = cnow.overrun;
2172 icount->parity = cnow.parity;
2173 icount->brk = cnow.brk;
2174 icount->buf_overrun = cnow.buf_overrun;
2175
9c134a14
GKH		 2176 dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__,
2177 icount->rx, icount->tx);
0bca1b91
AC		 2178 return 0;
2179}
2180
3f542974
PS		 2181/*****************************************************************************
2182 * SerialIoctl
2183 * this function handles any ioctl calls to the driver
2184 *****************************************************************************/
2185
00a0d0d6 2186static int mos7840_ioctl(struct tty_struct *tty,
3f542974
PS		 2187 unsigned int cmd, unsigned long arg)
2188{
95da310e 2189 struct usb_serial_port *port = tty->driver_data;
97c4965d 2190 void __user *argp = (void __user *)arg;
3f542974 2191 struct moschip_port *mos7840_port;
3f542974
PS		 2192
2193 struct async_icount cnow;
2194 struct async_icount cprev;
3f542974 2195
9c134a14 2196 if (mos7840_port_paranoia_check(port, __func__))
3f542974 2197 return -1;
3f542974
PS		 2198
2199 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2200
2201 if (mos7840_port == NULL)
2202 return -1;
2203
9c134a14 2204 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
3f542974
PS		 2205
2206 switch (cmd) {
2207 /* return number of bytes available */
2208
3f542974 2209 case TIOCSERGETLSR:
9c134a14 2210 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
95da310e 2211 return mos7840_get_lsr_info(tty, argp);
3f542974 2212
3f542974 2213 case TIOCGSERIAL:
9c134a14 2214 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
97c4965d 2215 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2216
2217 case TIOCSSERIAL:
9c134a14 2218 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
3f542974
PS		 2219 break;
2220
2221 case TIOCMIWAIT:
9c134a14 2222 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__);
3f542974
PS		 2223 cprev = mos7840_port->icount;
2224 while (1) {
880af9db 2225 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974
PS		 2226 mos7840_port->delta_msr_cond = 0;
2227 wait_event_interruptible(mos7840_port->delta_msr_wait,
2228 (mos7840_port->
2229 delta_msr_cond == 1));
2230
2231 /* see if a signal did it */
2232 if (signal_pending(current))
2233 return -ERESTARTSYS;
2234 cnow = mos7840_port->icount;
0de9a702 2235 smp_rmb();
3f542974
PS		 2236 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2237 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2238 return -EIO; /* no change => error */
2239 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2240 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2241 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2242 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2243 return 0;
2244 }
2245 cprev = cnow;
2246 }
2247 /* NOTREACHED */
2248 break;
2249
3f542974
PS		 2250 default:
2251 break;
2252 }
3f542974
PS		 2253 return -ENOIOCTLCMD;
2254}
2255
0eafe4de
D		 2256static int mos7810_check(struct usb_serial *serial)
2257{
2258 int i, pass_count = 0;
2259 __u16 data = 0, mcr_data = 0;
2260 __u16 test_pattern = 0x55AA;
2261
2262 /* Store MCR setting */
2263 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2264 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2265 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2266
2267 for (i = 0; i < 16; i++) {
2268 /* Send the 1-bit test pattern out to MCS7810 test pin */
2269 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2270 MCS_WRREQ, MCS_WR_RTYPE,
2271 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2272 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2273
2274 /* Read the test pattern back */
2275 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2276 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2277 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2278
2279 /* If this is a MCS7810 device, both test patterns must match */
2280 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2281 break;
2282
2283 pass_count++;
2284 }
2285
2286 /* Restore MCR setting */
2287 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2288 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2289 0, MOS_WDR_TIMEOUT);
2290
2291 if (pass_count == 16)
2292 return 1;
2293
2294 return 0;
2295}
2296
3f542974
PS		 2297static int mos7840_calc_num_ports(struct usb_serial *serial)
2298{
0eafe4de 2299 __u16 data = 0x00;
093ea2d3
DL		 2300 int mos7840_num_ports;
2301
0eafe4de
D		 2302 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2303 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
093ea2d3
DL		 2304 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2305
0eafe4de
D		 2306 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||
2307 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {
2308 device_type = serial->dev->descriptor.idProduct;
093ea2d3 2309 } else {
0eafe4de
D		 2310 /* For a MCS7840 device GPIO0 must be set to 1 */
2311 if ((data & 0x01) == 1)
2312 device_type = MOSCHIP_DEVICE_ID_7840;
2313 else if (mos7810_check(serial))
2314 device_type = MOSCHIP_DEVICE_ID_7810;
2315 else
2316 device_type = MOSCHIP_DEVICE_ID_7820;
3f542974 2317 }
093ea2d3 2318
0eafe4de
D		 2319 mos7840_num_ports = (device_type >> 4) & 0x000F;
2320 serial->num_bulk_in = mos7840_num_ports;
2321 serial->num_bulk_out = mos7840_num_ports;
2322 serial->num_ports = mos7840_num_ports;
2323
3f542974
PS		 2324 return mos7840_num_ports;
2325}
2326
80c00750 2327static int mos7840_port_probe(struct usb_serial_port *port)
3f542974 2328{
80c00750 2329 struct usb_serial *serial = port->serial;
3f542974 2330 struct moschip_port *mos7840_port;
80c00750
JH		 2331 int status;
2332 int pnum;
3f542974 2333 __u16 Data;
3f542974 2334
3f542974
PS		 2335 /* we set up the pointers to the endpoints in the mos7840_open *
2336 * function, as the structures aren't created yet. */
2337
80c00750
JH		 2338 pnum = port->number - serial->minor;
2339
ae685eff
JH		 2340 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2341 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2342 if (mos7840_port == NULL) {
2343 dev_err(&port->dev, "%s - Out of memory\n", __func__);
2344 return -ENOMEM;
2345 }
3f542974 2346
ae685eff
JH		 2347 /* Initialize all port interrupt end point to port 0 int
2348 * endpoint. Our device has only one interrupt end point
2349 * common to all port */
2350
2351 mos7840_port->port = port;
2352 mos7840_set_port_private(port, mos7840_port);
2353 spin_lock_init(&mos7840_port->pool_lock);
2354
2355 /* minor is not initialised until later by
2356 * usb-serial.c:get_free_serial() and cannot therefore be used
2357 * to index device instances */
2358 mos7840_port->port_num = pnum + 1;
2359 dev_dbg(&port->dev, "port->number = %d\n", port->number);
2360 dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor);
2361 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2362 dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor);
2363
2364 if (mos7840_port->port_num == 1) {
2365 mos7840_port->SpRegOffset = 0x0;
2366 mos7840_port->ControlRegOffset = 0x1;
2367 mos7840_port->DcrRegOffset = 0x4;
2368 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2369 mos7840_port->SpRegOffset = 0x8;
2370 mos7840_port->ControlRegOffset = 0x9;
2371 mos7840_port->DcrRegOffset = 0x16;
2372 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2373 mos7840_port->SpRegOffset = 0xa;
2374 mos7840_port->ControlRegOffset = 0xb;
2375 mos7840_port->DcrRegOffset = 0x19;
2376 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2377 mos7840_port->SpRegOffset = 0xa;
2378 mos7840_port->ControlRegOffset = 0xb;
2379 mos7840_port->DcrRegOffset = 0x19;
2380 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2381 mos7840_port->SpRegOffset = 0xc;
2382 mos7840_port->ControlRegOffset = 0xd;
2383 mos7840_port->DcrRegOffset = 0x1c;
2384 }
2385 mos7840_dump_serial_port(port, mos7840_port);
2386 mos7840_set_port_private(port, mos7840_port);
2387
2388 /* enable rx_disable bit in control register */
2389 status = mos7840_get_reg_sync(port,
2390 mos7840_port->ControlRegOffset, &Data);
2391 if (status < 0) {
2392 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2393 goto out;
2394 } else
2395 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2396 Data |= 0x08; /* setting driver done bit */
2397 Data |= 0x04; /* sp1_bit to have cts change reflect in
2398 modem status reg */
2399
2400 /* Data |= 0x20; //rx_disable bit */
2401 status = mos7840_set_reg_sync(port,
2402 mos7840_port->ControlRegOffset, Data);
2403 if (status < 0) {
2404 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2405 goto out;
2406 } else
2407 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2408
2409 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2410 and 0x24 in DCR3 */
2411 Data = 0x01;
2412 status = mos7840_set_reg_sync(port,
2413 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2414 if (status < 0) {
2415 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2416 goto out;
2417 } else
2418 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
3f542974 2419
ae685eff
JH		 2420 Data = 0x05;
2421 status = mos7840_set_reg_sync(port,
2422 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2423 if (status < 0) {
2424 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2425 goto out;
2426 } else
2427 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
3f542974 2428
ae685eff
JH		 2429 Data = 0x24;
2430 status = mos7840_set_reg_sync(port,
2431 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2432 if (status < 0) {
2433 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2434 goto out;
2435 } else
2436 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
3f542974 2437
ae685eff
JH		 2438 /* write values in clkstart0x0 and clkmulti 0x20 */
2439 Data = 0x0;
2440 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2441 if (status < 0) {
2442 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2443 goto out;
2444 } else
2445 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
3f542974 2446
ae685eff
JH		 2447 Data = 0x20;
2448 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2449 if (status < 0) {
2450 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2451 goto error;
2452 } else
2453 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
3f542974 2454
ae685eff
JH		 2455 /* write value 0x0 to scratchpad register */
2456 Data = 0x00;
2457 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2458 if (status < 0) {
2459 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2460 goto out;
2461 } else
2462 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2463
2464 /* Zero Length flag register */
2465 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2466 Data = 0xff;
80c00750 2467 status = mos7840_set_reg_sync(port,
ae685eff
JH		 2468 (__u16) (ZLP_REG1 +
2469 ((__u16)mos7840_port->port_num)), Data);
2470 dev_dbg(&port->dev, "ZLIP offset %x\n",
2471 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
3f542974 2472 if (status < 0) {
ae685eff
JH		 2473 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2474 goto out;
3f542974 2475 } else
ae685eff
JH		 2476 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2477 } else {
2478 Data = 0xff;
80c00750 2479 status = mos7840_set_reg_sync(port,
ae685eff
JH		 2480 (__u16) (ZLP_REG1 +
2481 ((__u16)mos7840_port->port_num) - 0x1), Data);
2482 dev_dbg(&port->dev, "ZLIP offset %x\n",
2483 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
3f542974 2484 if (status < 0) {
ae685eff
JH		 2485 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2486 goto out;
3f542974 2487 } else
ae685eff 2488 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
3f542974 2489
ae685eff
JH		 2490 }
2491 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2492 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2493 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2494 GFP_KERNEL);
2495 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2496 !mos7840_port->dr) {
2497 status = -ENOMEM;
2498 goto error;
2499 }
0eafe4de 2500
ae685eff 2501 mos7840_port->has_led = false;
0eafe4de 2502
ae685eff
JH		 2503 /* Initialize LED timers */
2504 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2505 mos7840_port->has_led = true;
0eafe4de 2506
ae685eff
JH		 2507 init_timer(&mos7840_port->led_timer1);
2508 mos7840_port->led_timer1.function = mos7840_led_off;
2509 mos7840_port->led_timer1.expires =
2510 jiffies + msecs_to_jiffies(LED_ON_MS);
2511 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
0eafe4de 2512
ae685eff
JH		 2513 init_timer(&mos7840_port->led_timer2);
2514 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2515 mos7840_port->led_timer2.expires =
2516 jiffies + msecs_to_jiffies(LED_OFF_MS);
2517 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
0eafe4de 2518
ae685eff 2519 mos7840_port->led_flag = false;
3f542974 2520
ae685eff
JH		 2521 /* Turn off LED */
2522 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2523 }
2524out:
80c00750
JH		 2525 if (pnum == serial->num_ports - 1) {
2526 /* Zero Length flag enable */
2527 Data = 0x0f;
2528 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2529 if (status < 0) {
2530 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2531 goto error;
2532 } else
2533 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2534
2535 /* setting configuration feature to one */
2536 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2537 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2538 MOS_WDR_TIMEOUT);
2539 }
3f542974 2540 return 0;
0de9a702 2541error:
80c00750
JH		 2542 kfree(mos7840_port->dr);
2543 kfree(mos7840_port->ctrl_buf);
2544 usb_free_urb(mos7840_port->control_urb);
2545 kfree(mos7840_port);
0de9a702 2546
0de9a702 2547 return status;
3f542974
PS		 2548}
2549
80c00750 2550static int mos7840_port_remove(struct usb_serial_port *port)
3f542974 2551{
3f542974 2552 struct moschip_port *mos7840_port;
3f542974 2553
80c00750 2554 mos7840_port = mos7840_get_port_private(port);
3f542974 2555
80c00750
JH		 2556 if (mos7840_port->has_led) {
2557 /* Turn off LED */
2558 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
3f542974 2559
80c00750
JH		 2560 del_timer_sync(&mos7840_port->led_timer1);
2561 del_timer_sync(&mos7840_port->led_timer2);
f9c99bb8 2562 }
80c00750
JH		 2563 usb_kill_urb(mos7840_port->control_urb);
2564 usb_free_urb(mos7840_port->control_urb);
2565 kfree(mos7840_port->ctrl_buf);
2566 kfree(mos7840_port->dr);
2567 kfree(mos7840_port);
f9c99bb8 2568
80c00750 2569 return 0;
3f542974
PS		 2570}
2571
2572static struct usb_serial_driver moschip7840_4port_device = {
2573 .driver = {
2574 .owner = THIS_MODULE,
2575 .name = "mos7840",
2576 },
2577 .description = DRIVER_DESC,
68e24113 2578 .id_table = id_table,
3f542974 2579 .num_ports = 4,
3f542974
PS		 2580 .open = mos7840_open,
2581 .close = mos7840_close,
2582 .write = mos7840_write,
2583 .write_room = mos7840_write_room,
2584 .chars_in_buffer = mos7840_chars_in_buffer,
2585 .throttle = mos7840_throttle,
2586 .unthrottle = mos7840_unthrottle,
2587 .calc_num_ports = mos7840_calc_num_ports,
2588#ifdef MCSSerialProbe
2589 .probe = mos7840_serial_probe,
2590#endif
2591 .ioctl = mos7840_ioctl,
2592 .set_termios = mos7840_set_termios,
2593 .break_ctl = mos7840_break,
2594 .tiocmget = mos7840_tiocmget,
2595 .tiocmset = mos7840_tiocmset,
0bca1b91 2596 .get_icount = mos7840_get_icount,
80c00750
JH		 2597 .port_probe = mos7840_port_probe,
2598 .port_remove = mos7840_port_remove,
3f542974
PS		 2599 .read_bulk_callback = mos7840_bulk_in_callback,
2600 .read_int_callback = mos7840_interrupt_callback,
2601};
2602
4d2a7aff
AS		 2603static struct usb_serial_driver * const serial_drivers[] = {
2604 &moschip7840_4port_device, NULL
2605};
2606
68e24113 2607module_usb_serial_driver(serial_drivers, id_table);
3f542974 2608
3f542974
PS		 2609MODULE_DESCRIPTION(DRIVER_DESC);
2610MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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