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USB: keyspan_pda: remove bogus disconnect test in close
[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 221 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
3f542974
PS		 222 int delta_msr_cond;
223 struct async_icount icount;
224 struct usb_serial_port *port; /* loop back to the owner of this object */
225
880af9db 226 /* Offsets */
3f542974
PS		 227 __u8 SpRegOffset;
228 __u8 ControlRegOffset;
229 __u8 DcrRegOffset;
880af9db 230 /* for processing control URBS in interrupt context */
3f542974 231 struct urb *control_urb;
0de9a702 232 struct usb_ctrlrequest *dr;
3f542974
PS		 233 char *ctrl_buf;
234 int MsrLsr;
235
0de9a702 236 spinlock_t pool_lock;
3f542974 237 struct urb *write_urb_pool[NUM_URBS];
0de9a702 238 char busy[NUM_URBS];
50de36f7 239 bool read_urb_busy;
3f542974 240
0eafe4de
D		 241 /* For device(s) with LED indicator */
242 bool has_led;
243 bool led_flag;
244 struct timer_list led_timer1; /* Timer for LED on */
245 struct timer_list led_timer2; /* Timer for LED off */
246};
3f542974 247
3f542974
PS		 248/*
249 * mos7840_set_reg_sync
250 * To set the Control register by calling usb_fill_control_urb function
251 * by passing usb_sndctrlpipe function as parameter.
252 */
253
254static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
255 __u16 val)
256{
257 struct usb_device *dev = port->serial->dev;
258 val = val & 0x00ff;
9c134a14 259 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
3f542974
PS		 260
261 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
262 MCS_WR_RTYPE, val, reg, NULL, 0,
263 MOS_WDR_TIMEOUT);
264}
265
266/*
267 * mos7840_get_reg_sync
268 * To set the Uart register by calling usb_fill_control_urb function by
269 * passing usb_rcvctrlpipe function as parameter.
270 */
271
272static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
880af9db 273 __u16 *val)
3f542974
PS		 274{
275 struct usb_device *dev = port->serial->dev;
276 int ret = 0;
9e221a35
JH		 277 u8 *buf;
278
279 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
280 if (!buf)
281 return -ENOMEM;
3f542974
PS		 282
283 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 284 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
3f542974 285 MOS_WDR_TIMEOUT);
9e221a35 286 *val = buf[0];
9c134a14 287 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
9e221a35
JH		 288
289 kfree(buf);
3f542974
PS		 290 return ret;
291}
292
293/*
294 * mos7840_set_uart_reg
295 * To set the Uart register by calling usb_fill_control_urb function by
296 * passing usb_sndctrlpipe function as parameter.
297 */
298
299static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
300 __u16 val)
301{
302
303 struct usb_device *dev = port->serial->dev;
304 val = val & 0x00ff;
880af9db
AC		 305 /* For the UART control registers, the application number need
306 to be Or'ed */
0de9a702 307 if (port->serial->num_ports == 4) {
880af9db
AC		 308 val |= (((__u16) port->number -
309 (__u16) (port->serial->minor)) + 1) << 8;
3f542974
PS		 310 } else {
311 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 312 val |= (((__u16) port->number -
3f542974 313 (__u16) (port->serial->minor)) + 1) << 8;
3f542974 314 } else {
9c134a14 315 val |= (((__u16) port->number -
3f542974 316 (__u16) (port->serial->minor)) + 2) << 8;
3f542974
PS		 317 }
318 }
9c134a14 319 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
3f542974
PS		 320 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
321 MCS_WR_RTYPE, val, reg, NULL, 0,
322 MOS_WDR_TIMEOUT);
323
324}
325
326/*
327 * mos7840_get_uart_reg
328 * To set the Control register by calling usb_fill_control_urb function
329 * by passing usb_rcvctrlpipe function as parameter.
330 */
331static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
880af9db 332 __u16 *val)
3f542974
PS		 333{
334 struct usb_device *dev = port->serial->dev;
335 int ret = 0;
336 __u16 Wval;
9e221a35
JH		 337 u8 *buf;
338
339 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
340 if (!buf)
341 return -ENOMEM;
3f542974 342
880af9db 343 /* Wval is same as application number */
0de9a702 344 if (port->serial->num_ports == 4) {
3f542974
PS		 345 Wval =
346 (((__u16) port->number - (__u16) (port->serial->minor)) +
347 1) << 8;
3f542974
PS		 348 } else {
349 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 350 Wval = (((__u16) port->number -
3f542974 351 (__u16) (port->serial->minor)) + 1) << 8;
3f542974 352 } else {
880af9db 353 Wval = (((__u16) port->number -
3f542974 354 (__u16) (port->serial->minor)) + 2) << 8;
3f542974
PS		 355 }
356 }
9c134a14 357 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
3f542974 358 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 359 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
3f542974 360 MOS_WDR_TIMEOUT);
9e221a35
JH		 361 *val = buf[0];
362
363 kfree(buf);
3f542974
PS		 364 return ret;
365}
366
9c134a14
GKH		 367static void mos7840_dump_serial_port(struct usb_serial_port *port,
368 struct moschip_port *mos7840_port)
3f542974
PS		 369{
370
9c134a14
GKH		 371 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
372 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
373 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
3f542974
PS		 374
375}
376
377/************************************************************************/
378/************************************************************************/
379/* I N T E R F A C E F U N C T I O N S */
380/* I N T E R F A C E F U N C T I O N S */
381/************************************************************************/
382/************************************************************************/
383
384static inline void mos7840_set_port_private(struct usb_serial_port *port,
385 struct moschip_port *data)
386{
387 usb_set_serial_port_data(port, (void *)data);
388}
389
390static inline struct moschip_port *mos7840_get_port_private(struct
391 usb_serial_port
392 *port)
393{
394 return (struct moschip_port *)usb_get_serial_port_data(port);
395}
396
0de9a702 397static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
3f542974
PS		 398{
399 struct moschip_port *mos7840_port;
400 struct async_icount *icount;
401 mos7840_port = port;
402 icount = &mos7840_port->icount;
403 if (new_msr &
404 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
405 MOS_MSR_DELTA_CD)) {
406 icount = &mos7840_port->icount;
407
408 /* update input line counters */
409 if (new_msr & MOS_MSR_DELTA_CTS) {
410 icount->cts++;
0de9a702 411 smp_wmb();
3f542974
PS		 412 }
413 if (new_msr & MOS_MSR_DELTA_DSR) {
414 icount->dsr++;
0de9a702 415 smp_wmb();
3f542974
PS		 416 }
417 if (new_msr & MOS_MSR_DELTA_CD) {
418 icount->dcd++;
0de9a702 419 smp_wmb();
3f542974
PS		 420 }
421 if (new_msr & MOS_MSR_DELTA_RI) {
422 icount->rng++;
0de9a702 423 smp_wmb();
3f542974 424 }
e670c6af
JH		 425
426 mos7840_port->delta_msr_cond = 1;
a14430db 427 wake_up_interruptible(&port->port->delta_msr_wait);
3f542974 428 }
3f542974
PS		 429}
430
0de9a702 431static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
3f542974
PS		 432{
433 struct async_icount *icount;
434
3f542974 435 if (new_lsr & SERIAL_LSR_BI) {
880af9db
AC		 436 /*
437 * Parity and Framing errors only count if they
438 * occur exclusive of a break being
439 * received.
440 */
3f542974
PS		 441 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
442 }
443
444 /* update input line counters */
445 icount = &port->icount;
446 if (new_lsr & SERIAL_LSR_BI) {
447 icount->brk++;
0de9a702 448 smp_wmb();
3f542974
PS		 449 }
450 if (new_lsr & SERIAL_LSR_OE) {
451 icount->overrun++;
0de9a702 452 smp_wmb();
3f542974
PS		 453 }
454 if (new_lsr & SERIAL_LSR_PE) {
455 icount->parity++;
0de9a702 456 smp_wmb();
3f542974
PS		 457 }
458 if (new_lsr & SERIAL_LSR_FE) {
459 icount->frame++;
0de9a702 460 smp_wmb();
3f542974 461 }
3f542974
PS		 462}
463
464/************************************************************************/
465/************************************************************************/
466/* U S B C A L L B A C K F U N C T I O N S */
467/* U S B C A L L B A C K F U N C T I O N S */
468/************************************************************************/
469/************************************************************************/
470
7d12e780 471static void mos7840_control_callback(struct urb *urb)
3f542974
PS		 472{
473 unsigned char *data;
474 struct moschip_port *mos7840_port;
9c134a14 475 struct device *dev = &urb->dev->dev;
3f542974 476 __u8 regval = 0x0;
0643c724 477 int status = urb->status;
3f542974 478
cdc97792 479 mos7840_port = urb->context;
0de9a702 480
0643c724 481 switch (status) {
3f542974
PS		 482 case 0:
483 /* success */
484 break;
485 case -ECONNRESET:
486 case -ENOENT:
487 case -ESHUTDOWN:
488 /* this urb is terminated, clean up */
9c134a14 489 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
3f542974
PS		 490 return;
491 default:
9c134a14 492 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
28c3ae9a 493 return;
3f542974
PS		 494 }
495
9c134a14
GKH		 496 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
497 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
498 mos7840_port->MsrLsr, mos7840_port->port_num);
3f542974
PS		 499 data = urb->transfer_buffer;
500 regval = (__u8) data[0];
9c134a14 501 dev_dbg(dev, "%s data is %x\n", __func__, regval);
3f542974
PS		 502 if (mos7840_port->MsrLsr == 0)
503 mos7840_handle_new_msr(mos7840_port, regval);
504 else if (mos7840_port->MsrLsr == 1)
505 mos7840_handle_new_lsr(mos7840_port, regval);
3f542974
PS		 506}
507
508static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
880af9db 509 __u16 *val)
3f542974
PS		 510{
511 struct usb_device *dev = mcs->port->serial->dev;
0de9a702
ON		 512 struct usb_ctrlrequest *dr = mcs->dr;
513 unsigned char *buffer = mcs->ctrl_buf;
514 int ret;
3f542974 515
3f542974
PS		 516 dr->bRequestType = MCS_RD_RTYPE;
517 dr->bRequest = MCS_RDREQ;
880af9db 518 dr->wValue = cpu_to_le16(Wval); /* 0 */
3f542974
PS		 519 dr->wIndex = cpu_to_le16(reg);
520 dr->wLength = cpu_to_le16(2);
521
522 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
523 (unsigned char *)dr, buffer, 2,
524 mos7840_control_callback, mcs);
525 mcs->control_urb->transfer_buffer_length = 2;
526 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
527 return ret;
528}
529
0eafe4de
D		 530static void mos7840_set_led_callback(struct urb *urb)
531{
532 switch (urb->status) {
533 case 0:
534 /* Success */
535 break;
536 case -ECONNRESET:
537 case -ENOENT:
538 case -ESHUTDOWN:
539 /* This urb is terminated, clean up */
9c134a14
GKH		 540 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
541 __func__, urb->status);
0eafe4de
D		 542 break;
543 default:
9c134a14
GKH		 544 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
545 __func__, urb->status);
0eafe4de
D		 546 }
547}
548
549static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
550 __u16 reg)
551{
552 struct usb_device *dev = mcs->port->serial->dev;
553 struct usb_ctrlrequest *dr = mcs->dr;
554
555 dr->bRequestType = MCS_WR_RTYPE;
556 dr->bRequest = MCS_WRREQ;
557 dr->wValue = cpu_to_le16(wval);
558 dr->wIndex = cpu_to_le16(reg);
559 dr->wLength = cpu_to_le16(0);
560
561 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),
562 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
563
564 usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
565}
566
567static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
568 __u16 val)
569{
570 struct usb_device *dev = port->serial->dev;
571
572 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
573 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
574}
575
576static void mos7840_led_off(unsigned long arg)
577{
578 struct moschip_port *mcs = (struct moschip_port *) arg;
579
580 /* Turn off LED */
581 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
582 mod_timer(&mcs->led_timer2,
583 jiffies + msecs_to_jiffies(LED_OFF_MS));
584}
585
586static void mos7840_led_flag_off(unsigned long arg)
587{
588 struct moschip_port *mcs = (struct moschip_port *) arg;
589
590 mcs->led_flag = false;
591}
592
3f542974
PS		 593/*****************************************************************************
594 * mos7840_interrupt_callback
595 * this is the callback function for when we have received data on the
596 * interrupt endpoint.
597 *****************************************************************************/
598
7d12e780 599static void mos7840_interrupt_callback(struct urb *urb)
3f542974
PS		 600{
601 int result;
602 int length;
603 struct moschip_port *mos7840_port;
604 struct usb_serial *serial;
605 __u16 Data;
606 unsigned char *data;
607 __u8 sp[5], st;
0de9a702
ON		 608 int i, rv = 0;
609 __u16 wval, wreg = 0;
0643c724 610 int status = urb->status;
3f542974 611
0643c724 612 switch (status) {
3f542974
PS		 613 case 0:
614 /* success */
615 break;
616 case -ECONNRESET:
617 case -ENOENT:
618 case -ESHUTDOWN:
619 /* this urb is terminated, clean up */
9c134a14
GKH		 620 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
621 __func__, status);
3f542974
PS		 622 return;
623 default:
9c134a14
GKH		 624 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
625 __func__, status);
3f542974
PS		 626 goto exit;
627 }
628
629 length = urb->actual_length;
630 data = urb->transfer_buffer;
631
cdc97792 632 serial = urb->context;
3f542974
PS		 633
634 /* Moschip get 5 bytes
635 * Byte 1 IIR Port 1 (port.number is 0)
636 * Byte 2 IIR Port 2 (port.number is 1)
637 * Byte 3 IIR Port 3 (port.number is 2)
638 * Byte 4 IIR Port 4 (port.number is 3)
639 * Byte 5 FIFO status for both */
640
641 if (length && length > 5) {
9c134a14 642 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
3f542974
PS		 643 return;
644 }
645
646 sp[0] = (__u8) data[0];
647 sp[1] = (__u8) data[1];
648 sp[2] = (__u8) data[2];
649 sp[3] = (__u8) data[3];
650 st = (__u8) data[4];
651
652 for (i = 0; i < serial->num_ports; i++) {
653 mos7840_port = mos7840_get_port_private(serial->port[i]);
654 wval =
655 (((__u16) serial->port[i]->number -
656 (__u16) (serial->minor)) + 1) << 8;
657 if (mos7840_port->open) {
658 if (sp[i] & 0x01) {
9c134a14 659 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
3f542974
PS		 660 } else {
661 switch (sp[i] & 0x0f) {
662 case SERIAL_IIR_RLS:
9c134a14
GKH		 663 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
664 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
3f542974 665 mos7840_port->MsrLsr = 1;
0de9a702 666 wreg = LINE_STATUS_REGISTER;
3f542974
PS		 667 break;
668 case SERIAL_IIR_MS:
9c134a14 669 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
3f542974 670 mos7840_port->MsrLsr = 0;
0de9a702 671 wreg = MODEM_STATUS_REGISTER;
3f542974
PS		 672 break;
673 }
e681b66f 674 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
3f542974
PS		 675 }
676 }
677 }
880af9db
AC		 678 if (!(rv < 0))
679 /* the completion handler for the control urb will resubmit */
0de9a702
ON		 680 return;
681exit:
3f542974
PS		 682 result = usb_submit_urb(urb, GFP_ATOMIC);
683 if (result) {
684 dev_err(&urb->dev->dev,
685 "%s - Error %d submitting interrupt urb\n",
441b62c1 686 __func__, result);
3f542974 687 }
3f542974
PS		 688}
689
690static int mos7840_port_paranoia_check(struct usb_serial_port *port,
691 const char *function)
692{
693 if (!port) {
9c134a14 694 pr_debug("%s - port == NULL\n", function);
3f542974
PS		 695 return -1;
696 }
697 if (!port->serial) {
9c134a14 698 pr_debug("%s - port->serial == NULL\n", function);
3f542974
PS		 699 return -1;
700 }
701
702 return 0;
703}
704
705/* Inline functions to check the sanity of a pointer that is passed to us */
706static int mos7840_serial_paranoia_check(struct usb_serial *serial,
707 const char *function)
708{
709 if (!serial) {
9c134a14 710 pr_debug("%s - serial == NULL\n", function);
3f542974
PS		 711 return -1;
712 }
713 if (!serial->type) {
9c134a14 714 pr_debug("%s - serial->type == NULL!\n", function);
3f542974
PS		 715 return -1;
716 }
717
718 return 0;
719}
720
721static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
722 const char *function)
723{
724 /* if no port was specified, or it fails a paranoia check */
725 if (!port ||
726 mos7840_port_paranoia_check(port, function) ||
727 mos7840_serial_paranoia_check(port->serial, function)) {
880af9db
AC		 728 /* then say that we don't have a valid usb_serial thing,
729 * which will end up genrating -ENODEV return values */
3f542974
PS		 730 return NULL;
731 }
732
733 return port->serial;
734}
735
736/*****************************************************************************
737 * mos7840_bulk_in_callback
738 * this is the callback function for when we have received data on the
739 * bulk in endpoint.
740 *****************************************************************************/
741
7d12e780 742static void mos7840_bulk_in_callback(struct urb *urb)
3f542974 743{
0643c724 744 int retval;
3f542974
PS		 745 unsigned char *data;
746 struct usb_serial *serial;
747 struct usb_serial_port *port;
748 struct moschip_port *mos7840_port;
0643c724 749 int status = urb->status;
3f542974 750
cdc97792 751 mos7840_port = urb->context;
9c134a14 752 if (!mos7840_port)
50de36f7 753 return;
50de36f7
GKH		 754
755 if (status) {
9c134a14 756 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
50de36f7 757 mos7840_port->read_urb_busy = false;
3f542974
PS		 758 return;
759 }
760
9c134a14 761 port = mos7840_port->port;
441b62c1 762 if (mos7840_port_paranoia_check(port, __func__)) {
50de36f7 763 mos7840_port->read_urb_busy = false;
3f542974
PS		 764 return;
765 }
766
441b62c1 767 serial = mos7840_get_usb_serial(port, __func__);
3f542974 768 if (!serial) {
50de36f7 769 mos7840_port->read_urb_busy = false;
3f542974
PS		 770 return;
771 }
772
3f542974 773 data = urb->transfer_buffer;
59d33f2f 774 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
3f542974 775
3f542974 776 if (urb->actual_length) {
05c7cd39 777 struct tty_port *tport = &mos7840_port->port->port;
2e124b4a
JS		 778 tty_insert_flip_string(tport, data, urb->actual_length);
779 tty_flip_buffer_push(tport);
3f542974 780 mos7840_port->icount.rx += urb->actual_length;
0de9a702 781 smp_wmb();
9c134a14 782 dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx);
3f542974
PS		 783 }
784
785 if (!mos7840_port->read_urb) {
9c134a14 786 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
50de36f7 787 mos7840_port->read_urb_busy = false;
3f542974
PS		 788 return;
789 }
790
0eafe4de
D		 791 /* Turn on LED */
792 if (mos7840_port->has_led && !mos7840_port->led_flag) {
793 mos7840_port->led_flag = true;
794 mos7840_set_led_async(mos7840_port, 0x0301,
795 MODEM_CONTROL_REGISTER);
796 mod_timer(&mos7840_port->led_timer1,
797 jiffies + msecs_to_jiffies(LED_ON_MS));
798 }
3f542974 799
50de36f7 800 mos7840_port->read_urb_busy = true;
0643c724 801 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
0de9a702 802
0643c724 803 if (retval) {
9c134a14 804 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
50de36f7 805 mos7840_port->read_urb_busy = false;
3f542974
PS		 806 }
807}
808
809/*****************************************************************************
810 * mos7840_bulk_out_data_callback
880af9db
AC		 811 * this is the callback function for when we have finished sending
812 * serial data on the bulk out endpoint.
3f542974
PS		 813 *****************************************************************************/
814
7d12e780 815static void mos7840_bulk_out_data_callback(struct urb *urb)
3f542974
PS		 816{
817 struct moschip_port *mos7840_port;
9c134a14 818 struct usb_serial_port *port;
3f542974 819 struct tty_struct *tty;
0643c724 820 int status = urb->status;
0de9a702
ON		 821 int i;
822
cdc97792 823 mos7840_port = urb->context;
9c134a14 824 port = mos7840_port->port;
0de9a702
ON		 825 spin_lock(&mos7840_port->pool_lock);
826 for (i = 0; i < NUM_URBS; i++) {
827 if (urb == mos7840_port->write_urb_pool[i]) {
828 mos7840_port->busy[i] = 0;
829 break;
830 }
831 }
832 spin_unlock(&mos7840_port->pool_lock);
833
0643c724 834 if (status) {
9c134a14 835 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
3f542974
PS		 836 return;
837 }
838
9c134a14 839 if (mos7840_port_paranoia_check(port, __func__))
3f542974 840 return;
3f542974 841
9c134a14 842 tty = tty_port_tty_get(&port->port);
b963a844
JS		 843 if (tty && mos7840_port->open)
844 tty_wakeup(tty);
4a90f09b 845 tty_kref_put(tty);
3f542974
PS		 846
847}
848
849/************************************************************************/
850/* 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 */
851/************************************************************************/
852#ifdef MCSSerialProbe
853static int mos7840_serial_probe(struct usb_serial *serial,
854 const struct usb_device_id *id)
855{
856
857 /*need to implement the mode_reg reading and updating\
858 structures usb_serial_ device_type\
859 (i.e num_ports, num_bulkin,bulkout etc) */
860 /* Also we can update the changes attach */
861 return 1;
862}
863#endif
864
865/*****************************************************************************
866 * mos7840_open
867 * this function is called by the tty driver when a port is opened
868 * If successful, we return 0
869 * Otherwise we return a negative error number.
870 *****************************************************************************/
871
a509a7e4 872static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
3f542974
PS		 873{
874 int response;
875 int j;
876 struct usb_serial *serial;
877 struct urb *urb;
878 __u16 Data;
879 int status;
880 struct moschip_port *mos7840_port;
0de9a702 881 struct moschip_port *port0;
3f542974 882
9c134a14 883 if (mos7840_port_paranoia_check(port, __func__))
3f542974 884 return -ENODEV;
3f542974 885
3f542974
PS		 886 serial = port->serial;
887
9c134a14 888 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 889 return -ENODEV;
3f542974
PS		 890
891 mos7840_port = mos7840_get_port_private(port);
0de9a702 892 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 893
0de9a702 894 if (mos7840_port == NULL || port0 == NULL)
3f542974
PS		 895 return -ENODEV;
896
897 usb_clear_halt(serial->dev, port->write_urb->pipe);
898 usb_clear_halt(serial->dev, port->read_urb->pipe);
0de9a702 899 port0->open_ports++;
3f542974
PS		 900
901 /* Initialising the write urb pool */
902 for (j = 0; j < NUM_URBS; ++j) {
0de9a702 903 urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974
PS		 904 mos7840_port->write_urb_pool[j] = urb;
905
906 if (urb == NULL) {
194343d9 907 dev_err(&port->dev, "No more urbs???\n");
3f542974
PS		 908 continue;
909 }
910
880af9db
AC		 911 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
912 GFP_KERNEL);
3f542974 913 if (!urb->transfer_buffer) {
0de9a702
ON		 914 usb_free_urb(urb);
915 mos7840_port->write_urb_pool[j] = NULL;
194343d9
GKH		 916 dev_err(&port->dev,
917 "%s-out of memory for urb buffers.\n",
918 __func__);
3f542974
PS		 919 continue;
920 }
921 }
922
923/*****************************************************************************
924 * Initialize MCS7840 -- Write Init values to corresponding Registers
925 *
926 * Register Index
927 * 1 : IER
928 * 2 : FCR
929 * 3 : LCR
930 * 4 : MCR
931 *
932 * 0x08 : SP1/2 Control Reg
933 *****************************************************************************/
934
880af9db 935 /* NEED to check the following Block */
3f542974 936
3f542974
PS		 937 Data = 0x0;
938 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
939 if (status < 0) {
9c134a14 940 dev_dbg(&port->dev, "Reading Spreg failed\n");
3f542974
PS		 941 return -1;
942 }
943 Data |= 0x80;
944 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
945 if (status < 0) {
9c134a14 946 dev_dbg(&port->dev, "writing Spreg failed\n");
3f542974
PS		 947 return -1;
948 }
949
950 Data &= ~0x80;
951 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
952 if (status < 0) {
9c134a14 953 dev_dbg(&port->dev, "writing Spreg failed\n");
3f542974
PS		 954 return -1;
955 }
880af9db 956 /* End of block to be checked */
3f542974 957
3f542974 958 Data = 0x0;
880af9db
AC		 959 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
960 &Data);
3f542974 961 if (status < 0) {
9c134a14 962 dev_dbg(&port->dev, "Reading Controlreg failed\n");
3f542974
PS		 963 return -1;
964 }
880af9db
AC		 965 Data |= 0x08; /* Driver done bit */
966 Data |= 0x20; /* rx_disable */
967 status = mos7840_set_reg_sync(port,
968 mos7840_port->ControlRegOffset, Data);
3f542974 969 if (status < 0) {
9c134a14 970 dev_dbg(&port->dev, "writing Controlreg failed\n");
3f542974
PS		 971 return -1;
972 }
880af9db
AC		 973 /* do register settings here */
974 /* Set all regs to the device default values. */
975 /***********************************
976 * First Disable all interrupts.
977 ***********************************/
3f542974 978 Data = 0x00;
3f542974
PS		 979 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
980 if (status < 0) {
9c134a14 981 dev_dbg(&port->dev, "disabling interrupts failed\n");
3f542974
PS		 982 return -1;
983 }
880af9db 984 /* Set FIFO_CONTROL_REGISTER to the default value */
3f542974 985 Data = 0x00;
3f542974
PS		 986 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
987 if (status < 0) {
9c134a14 988 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
3f542974
PS		 989 return -1;
990 }
991
992 Data = 0xcf;
3f542974
PS		 993 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
994 if (status < 0) {
9c134a14 995 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
3f542974
PS		 996 return -1;
997 }
998
999 Data = 0x03;
3f542974
PS		 1000 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1001 mos7840_port->shadowLCR = Data;
1002
1003 Data = 0x0b;
3f542974
PS		 1004 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1005 mos7840_port->shadowMCR = Data;
1006
1007 Data = 0x00;
3f542974
PS		 1008 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1009 mos7840_port->shadowLCR = Data;
1010
880af9db 1011 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1012 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1013
1014 Data = 0x0c;
3f542974
PS		 1015 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1016
1017 Data = 0x0;
3f542974
PS		 1018 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1019
1020 Data = 0x00;
3f542974
PS		 1021 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1022
1023 Data = Data & ~SERIAL_LCR_DLAB;
3f542974
PS		 1024 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1025 mos7840_port->shadowLCR = Data;
1026
880af9db 1027 /* clearing Bulkin and Bulkout Fifo */
3f542974 1028 Data = 0x0;
3f542974
PS		 1029 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1030
1031 Data = Data | 0x0c;
3f542974
PS		 1032 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1033
1034 Data = Data & ~0x0c;
3f542974 1035 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
880af9db 1036 /* Finally enable all interrupts */
3f542974 1037 Data = 0x0c;
3f542974
PS		 1038 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1039
880af9db 1040 /* clearing rx_disable */
3f542974 1041 Data = 0x0;
880af9db
AC		 1042 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1043 &Data);
3f542974 1044 Data = Data & ~0x20;
880af9db
AC		 1045 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1046 Data);
3f542974 1047
880af9db 1048 /* rx_negate */
3f542974 1049 Data = 0x0;
880af9db
AC		 1050 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1051 &Data);
3f542974 1052 Data = Data | 0x10;
880af9db
AC		 1053 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1054 Data);
3f542974 1055
880af9db
AC		 1056 /* Check to see if we've set up our endpoint info yet *
1057 * (can't set it up in mos7840_startup as the structures *
1058 * were not set up at that time.) */
0de9a702 1059 if (port0->open_ports == 1) {
3f542974 1060 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1061 /* set up interrupt urb */
3f542974 1062 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1063 serial->dev,
1064 usb_rcvintpipe(serial->dev,
1065 serial->port[0]->interrupt_in_endpointAddress),
1066 serial->port[0]->interrupt_in_buffer,
1067 serial->port[0]->interrupt_in_urb->
1068 transfer_buffer_length,
1069 mos7840_interrupt_callback,
1070 serial,
1071 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1072
1073 /* start interrupt read for mos7840 *
1074 * will continue as long as mos7840 is connected */
1075
1076 response =
1077 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1078 GFP_KERNEL);
1079 if (response) {
194343d9
GKH		 1080 dev_err(&port->dev, "%s - Error %d submitting "
1081 "interrupt urb\n", __func__, response);
3f542974
PS		 1082 }
1083
1084 }
1085
1086 }
1087
1088 /* see if we've set up our endpoint info yet *
1089 * (can't set it up in mos7840_startup as the *
1090 * structures were not set up at that time.) */
1091
9c134a14
GKH		 1092 dev_dbg(&port->dev, "port number is %d\n", port->number);
1093 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor);
1094 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1095 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1096 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1097 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
3f542974
PS		 1098 mos7840_port->read_urb = port->read_urb;
1099
1100 /* set up our bulk in urb */
093ea2d3
DL		 1101 if ((serial->num_ports == 2)
1102 && ((((__u16)port->number -
1103 (__u16)(port->serial->minor)) % 2) != 0)) {
1104 usb_fill_bulk_urb(mos7840_port->read_urb,
1105 serial->dev,
1106 usb_rcvbulkpipe(serial->dev,
1107 (port->bulk_in_endpointAddress) + 2),
1108 port->bulk_in_buffer,
1109 mos7840_port->read_urb->transfer_buffer_length,
1110 mos7840_bulk_in_callback, mos7840_port);
1111 } else {
1112 usb_fill_bulk_urb(mos7840_port->read_urb,
1113 serial->dev,
1114 usb_rcvbulkpipe(serial->dev,
1115 port->bulk_in_endpointAddress),
1116 port->bulk_in_buffer,
1117 mos7840_port->read_urb->transfer_buffer_length,
1118 mos7840_bulk_in_callback, mos7840_port);
1119 }
3f542974 1120
9c134a14 1121 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
50de36f7 1122 mos7840_port->read_urb_busy = true;
3f542974
PS		 1123 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1124 if (response) {
194343d9
GKH		 1125 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1126 __func__, response);
50de36f7 1127 mos7840_port->read_urb_busy = false;
3f542974
PS		 1128 }
1129
1130 /* initialize our wait queues */
1131 init_waitqueue_head(&mos7840_port->wait_chase);
3f542974
PS		 1132
1133 /* initialize our icount structure */
1134 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1135
1136 /* initialize our port settings */
880af9db
AC		 1137 /* Must set to enable ints! */
1138 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1139 /* send a open port command */
1140 mos7840_port->open = 1;
880af9db 1141 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974
PS		 1142 mos7840_port->icount.tx = 0;
1143 mos7840_port->icount.rx = 0;
1144
3f542974 1145 return 0;
3f542974
PS		 1146}
1147
1148/*****************************************************************************
1149 * mos7840_chars_in_buffer
1150 * this function is called by the tty driver when it wants to know how many
1151 * bytes of data we currently have outstanding in the port (data that has
1152 * been written, but hasn't made it out the port yet)
1153 * If successful, we return the number of bytes left to be written in the
1154 * system,
95da310e 1155 * Otherwise we return zero.
3f542974
PS		 1156 *****************************************************************************/
1157
95da310e 1158static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1159{
95da310e 1160 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1161 int i;
1162 int chars = 0;
0de9a702 1163 unsigned long flags;
3f542974
PS		 1164 struct moschip_port *mos7840_port;
1165
9c134a14 1166 if (mos7840_port_paranoia_check(port, __func__))
95da310e 1167 return 0;
3f542974
PS		 1168
1169 mos7840_port = mos7840_get_port_private(port);
3363155b 1170 if (mos7840_port == NULL)
95da310e 1171 return 0;
3f542974 1172
880af9db 1173 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
5c263b92
MF		 1174 for (i = 0; i < NUM_URBS; ++i) {
1175 if (mos7840_port->busy[i]) {
1176 struct urb *urb = mos7840_port->write_urb_pool[i];
1177 chars += urb->transfer_buffer_length;
1178 }
1179 }
880af9db 1180 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
9c134a14 1181 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
0de9a702 1182 return chars;
3f542974
PS		 1183
1184}
1185
3f542974
PS		 1186/*****************************************************************************
1187 * mos7840_close
1188 * this function is called by the tty driver when a port is closed
1189 *****************************************************************************/
1190
335f8514 1191static void mos7840_close(struct usb_serial_port *port)
3f542974
PS		 1192{
1193 struct usb_serial *serial;
1194 struct moschip_port *mos7840_port;
0de9a702 1195 struct moschip_port *port0;
3f542974
PS		 1196 int j;
1197 __u16 Data;
1198
9c134a14 1199 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1200 return;
3f542974 1201
441b62c1 1202 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1203 if (!serial)
3f542974 1204 return;
3f542974
PS		 1205
1206 mos7840_port = mos7840_get_port_private(port);
0de9a702 1207 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1208
0de9a702 1209 if (mos7840_port == NULL || port0 == NULL)
3f542974 1210 return;
3f542974
PS		 1211
1212 for (j = 0; j < NUM_URBS; ++j)
1213 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1214
1215 /* Freeing Write URBs */
1216 for (j = 0; j < NUM_URBS; ++j) {
1217 if (mos7840_port->write_urb_pool[j]) {
1218 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1219 kfree(mos7840_port->write_urb_pool[j]->
1220 transfer_buffer);
1221
1222 usb_free_urb(mos7840_port->write_urb_pool[j]);
1223 }
1224 }
1225
3f542974
PS		 1226 /* While closing port, shutdown all bulk read, write *
1227 * and interrupt read if they exists */
1228 if (serial->dev) {
3f542974 1229 if (mos7840_port->write_urb) {
9c134a14 1230 dev_dbg(&port->dev, "%s", "Shutdown bulk write\n");
3f542974
PS		 1231 usb_kill_urb(mos7840_port->write_urb);
1232 }
3f542974 1233 if (mos7840_port->read_urb) {
9c134a14 1234 dev_dbg(&port->dev, "%s", "Shutdown bulk read\n");
3f542974 1235 usb_kill_urb(mos7840_port->read_urb);
50de36f7 1236 mos7840_port->read_urb_busy = false;
3f542974
PS		 1237 }
1238 if ((&mos7840_port->control_urb)) {
9c134a14 1239 dev_dbg(&port->dev, "%s", "Shutdown control read\n");
880af9db 1240 /*/ usb_kill_urb (mos7840_port->control_urb); */
3f542974
PS		 1241 }
1242 }
880af9db
AC		 1243/* if(mos7840_port->ctrl_buf != NULL) */
1244/* kfree(mos7840_port->ctrl_buf); */
0de9a702 1245 port0->open_ports--;
9c134a14 1246 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number);
0de9a702 1247 if (port0->open_ports == 0) {
3f542974 1248 if (serial->port[0]->interrupt_in_urb) {
9c134a14 1249 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
0de9a702 1250 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1251 }
1252 }
1253
1254 if (mos7840_port->write_urb) {
1255 /* if this urb had a transfer buffer already (old tx) free it */
ae8d4879 1256 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1257 usb_free_urb(mos7840_port->write_urb);
1258 }
1259
1260 Data = 0x0;
1261 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1262
1263 Data = 0x00;
1264 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1265
1266 mos7840_port->open = 0;
3f542974
PS		 1267}
1268
1269/************************************************************************
1270 *
1271 * mos7840_block_until_chase_response
1272 *
1273 * This function will block the close until one of the following:
1274 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1275 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1276 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1277 *
1278 ************************************************************************/
1279
95da310e
AC		 1280static void mos7840_block_until_chase_response(struct tty_struct *tty,
1281 struct moschip_port *mos7840_port)
3f542974 1282{
1e658489 1283 int timeout = msecs_to_jiffies(1000);
3f542974
PS		 1284 int wait = 10;
1285 int count;
1286
1287 while (1) {
95da310e 1288 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1289
1290 /* Check for Buffer status */
880af9db 1291 if (count <= 0)
3f542974 1292 return;
3f542974
PS		 1293
1294 /* Block the thread for a while */
1295 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1296 timeout);
1297 /* No activity.. count down section */
1298 wait--;
1299 if (wait == 0) {
9c134a14 1300 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__);
3f542974
PS		 1301 return;
1302 } else {
dc0d5c1e 1303 /* Reset timeout value back to seconds */
3f542974
PS		 1304 wait = 10;
1305 }
1306 }
1307
1308}
1309
1310/*****************************************************************************
1311 * mos7840_break
1312 * this function sends a break to the port
1313 *****************************************************************************/
95da310e 1314static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1315{
95da310e 1316 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1317 unsigned char data;
1318 struct usb_serial *serial;
1319 struct moschip_port *mos7840_port;
1320
9c134a14 1321 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1322 return;
3f542974 1323
441b62c1 1324 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1325 if (!serial)
3f542974 1326 return;
3f542974
PS		 1327
1328 mos7840_port = mos7840_get_port_private(port);
1329
880af9db 1330 if (mos7840_port == NULL)
3f542974 1331 return;
3f542974 1332
95da310e 1333 if (serial->dev)
3f542974 1334 /* flush and block until tx is empty */
95da310e 1335 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1336
95da310e 1337 if (break_state == -1)
3f542974 1338 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1339 else
3f542974 1340 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974 1341
6b447f04 1342 /* FIXME: no locking on shadowLCR anywhere in driver */
3f542974 1343 mos7840_port->shadowLCR = data;
9c134a14 1344 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1345 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1346 mos7840_port->shadowLCR);
3f542974
PS		 1347}
1348
1349/*****************************************************************************
1350 * mos7840_write_room
1351 * this function is called by the tty driver when it wants to know how many
1352 * bytes of data we can accept for a specific port.
1353 * If successful, we return the amount of room that we have for this port
1354 * Otherwise we return a negative error number.
1355 *****************************************************************************/
1356
95da310e 1357static int mos7840_write_room(struct tty_struct *tty)
3f542974 1358{
95da310e 1359 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1360 int i;
1361 int room = 0;
0de9a702 1362 unsigned long flags;
3f542974
PS		 1363 struct moschip_port *mos7840_port;
1364
9c134a14 1365 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1366 return -1;
3f542974
PS		 1367
1368 mos7840_port = mos7840_get_port_private(port);
9c134a14 1369 if (mos7840_port == NULL)
3f542974 1370 return -1;
3f542974 1371
0de9a702 1372 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1373 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1374 if (!mos7840_port->busy[i])
3f542974 1375 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1376 }
0de9a702 1377 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1378
0de9a702 1379 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
9c134a14 1380 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
0de9a702 1381 return room;
3f542974
PS		 1382
1383}
1384
1385/*****************************************************************************
1386 * mos7840_write
1387 * this function is called by the tty driver when data should be written to
1388 * the port.
1389 * If successful, we return the number of bytes written, otherwise we
1390 * return a negative error number.
1391 *****************************************************************************/
1392
95da310e 1393static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1394 const unsigned char *data, int count)
1395{
1396 int status;
1397 int i;
1398 int bytes_sent = 0;
1399 int transfer_size;
0de9a702 1400 unsigned long flags;
3f542974
PS		 1401
1402 struct moschip_port *mos7840_port;
1403 struct usb_serial *serial;
1404 struct urb *urb;
880af9db 1405 /* __u16 Data; */
3f542974
PS		 1406 const unsigned char *current_position = data;
1407 unsigned char *data1;
3f542974
PS		 1408
1409#ifdef NOTMOS7840
1410 Data = 0x00;
3f542974
PS		 1411 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1412 mos7840_port->shadowLCR = Data;
9c134a14
GKH		 1413 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1414 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974 1415
880af9db
AC		 1416 /* Data = 0x03; */
1417 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1418 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1419
880af9db 1420 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1421 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1422
880af9db
AC		 1423 /* Data = 0x0c; */
1424 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1425 Data = 0x00;
3f542974 1426 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
9c134a14 1427 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
3f542974
PS		 1428
1429 Data = 0x0;
3f542974 1430 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
9c134a14 1431 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
3f542974
PS		 1432
1433 Data = Data & ~SERIAL_LCR_DLAB;
9c134a14 1434 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1435 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1436#endif
1437
9c134a14 1438 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1439 return -1;
3f542974
PS		 1440
1441 serial = port->serial;
9c134a14 1442 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 1443 return -1;
3f542974
PS		 1444
1445 mos7840_port = mos7840_get_port_private(port);
9c134a14 1446 if (mos7840_port == NULL)
3f542974 1447 return -1;
3f542974
PS		 1448
1449 /* try to find a free urb in the list */
1450 urb = NULL;
1451
0de9a702 1452 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1453 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1454 if (!mos7840_port->busy[i]) {
1455 mos7840_port->busy[i] = 1;
3f542974 1456 urb = mos7840_port->write_urb_pool[i];
9c134a14 1457 dev_dbg(&port->dev, "URB:%d\n", i);
3f542974
PS		 1458 break;
1459 }
1460 }
0de9a702 1461 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1462
1463 if (urb == NULL) {
9c134a14 1464 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
3f542974
PS		 1465 goto exit;
1466 }
1467
1468 if (urb->transfer_buffer == NULL) {
1469 urb->transfer_buffer =
1470 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1471
1472 if (urb->transfer_buffer == NULL) {
22a416c4 1473 dev_err_console(port, "%s no more kernel memory...\n",
194343d9 1474 __func__);
3f542974
PS		 1475 goto exit;
1476 }
1477 }
1478 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1479
97c4965d 1480 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1481
1482 /* fill urb with data and submit */
093ea2d3
DL		 1483 if ((serial->num_ports == 2)
1484 && ((((__u16)port->number -
1485 (__u16)(port->serial->minor)) % 2) != 0)) {
1486 usb_fill_bulk_urb(urb,
1487 serial->dev,
1488 usb_sndbulkpipe(serial->dev,
1489 (port->bulk_out_endpointAddress) + 2),
1490 urb->transfer_buffer,
1491 transfer_size,
1492 mos7840_bulk_out_data_callback, mos7840_port);
1493 } else {
1494 usb_fill_bulk_urb(urb,
1495 serial->dev,
1496 usb_sndbulkpipe(serial->dev,
1497 port->bulk_out_endpointAddress),
1498 urb->transfer_buffer,
1499 transfer_size,
1500 mos7840_bulk_out_data_callback, mos7840_port);
1501 }
3f542974
PS		 1502
1503 data1 = urb->transfer_buffer;
9c134a14 1504 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
3f542974 1505
0eafe4de
D		 1506 /* Turn on LED */
1507 if (mos7840_port->has_led && !mos7840_port->led_flag) {
1508 mos7840_port->led_flag = true;
1509 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);
1510 mod_timer(&mos7840_port->led_timer1,
1511 jiffies + msecs_to_jiffies(LED_ON_MS));
1512 }
1513
3f542974
PS		 1514 /* send it down the pipe */
1515 status = usb_submit_urb(urb, GFP_ATOMIC);
1516
1517 if (status) {
0de9a702 1518 mos7840_port->busy[i] = 0;
22a416c4 1519 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
194343d9 1520 "with status = %d\n", __func__, status);
3f542974
PS		 1521 bytes_sent = status;
1522 goto exit;
1523 }
1524 bytes_sent = transfer_size;
1525 mos7840_port->icount.tx += transfer_size;
0de9a702 1526 smp_wmb();
9c134a14 1527 dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
95da310e 1528exit:
3f542974
PS		 1529 return bytes_sent;
1530
1531}
1532
1533/*****************************************************************************
1534 * mos7840_throttle
1535 * this function is called by the tty driver when it wants to stop the data
1536 * being read from the port.
1537 *****************************************************************************/
1538
95da310e 1539static void mos7840_throttle(struct tty_struct *tty)
3f542974 1540{
95da310e 1541 struct usb_serial_port *port = tty->driver_data;
3f542974 1542 struct moschip_port *mos7840_port;
3f542974
PS		 1543 int status;
1544
9c134a14 1545 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1546 return;
3f542974
PS		 1547
1548 mos7840_port = mos7840_get_port_private(port);
1549
1550 if (mos7840_port == NULL)
1551 return;
1552
1553 if (!mos7840_port->open) {
9c134a14 1554 dev_dbg(&port->dev, "%s", "port not opened\n");
3f542974
PS		 1555 return;
1556 }
1557
3f542974
PS		 1558 /* if we are implementing XON/XOFF, send the stop character */
1559 if (I_IXOFF(tty)) {
1560 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1561 status = mos7840_write(tty, port, &stop_char, 1);
1562 if (status <= 0)
3f542974 1563 return;
3f542974 1564 }
3f542974 1565 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1566 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1567 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1568 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1569 mos7840_port->shadowMCR);
95da310e 1570 if (status < 0)
3f542974 1571 return;
3f542974 1572 }
3f542974
PS		 1573}
1574
1575/*****************************************************************************
1576 * mos7840_unthrottle
880af9db
AC		 1577 * this function is called by the tty driver when it wants to resume
1578 * the data being read from the port (called after mos7840_throttle is
1579 * called)
3f542974 1580 *****************************************************************************/
95da310e 1581static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1582{
95da310e 1583 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1584 int status;
1585 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1586
9c134a14 1587 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1588 return;
3f542974
PS		 1589
1590 if (mos7840_port == NULL)
1591 return;
1592
1593 if (!mos7840_port->open) {
9c134a14 1594 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1595 return;
1596 }
1597
3f542974
PS		 1598 /* if we are implementing XON/XOFF, send the start character */
1599 if (I_IXOFF(tty)) {
1600 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1601 status = mos7840_write(tty, port, &start_char, 1);
1602 if (status <= 0)
3f542974 1603 return;
3f542974
PS		 1604 }
1605
1606 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1607 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1608 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1609 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1610 mos7840_port->shadowMCR);
95da310e 1611 if (status < 0)
3f542974 1612 return;
3f542974 1613 }
3f542974
PS		 1614}
1615
60b33c13 1616static int mos7840_tiocmget(struct tty_struct *tty)
3f542974 1617{
95da310e 1618 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1619 struct moschip_port *mos7840_port;
1620 unsigned int result;
1621 __u16 msr;
1622 __u16 mcr;
880af9db 1623 int status;
3f542974
PS		 1624 mos7840_port = mos7840_get_port_private(port);
1625
3f542974
PS		 1626 if (mos7840_port == NULL)
1627 return -ENODEV;
1628
1629 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1630 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1631 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1632 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1633 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1634 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1635 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1636 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1637 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1638
9c134a14 1639 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
3f542974
PS		 1640
1641 return result;
1642}
1643
20b9d177 1644static int mos7840_tiocmset(struct tty_struct *tty,
3f542974
PS		 1645 unsigned int set, unsigned int clear)
1646{
95da310e 1647 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1648 struct moschip_port *mos7840_port;
1649 unsigned int mcr;
87521c46 1650 int status;
3f542974 1651
3f542974
PS		 1652 mos7840_port = mos7840_get_port_private(port);
1653
1654 if (mos7840_port == NULL)
1655 return -ENODEV;
1656
e2984494 1657 /* FIXME: What locks the port registers ? */
3f542974
PS		 1658 mcr = mos7840_port->shadowMCR;
1659 if (clear & TIOCM_RTS)
1660 mcr &= ~MCR_RTS;
1661 if (clear & TIOCM_DTR)
1662 mcr &= ~MCR_DTR;
1663 if (clear & TIOCM_LOOP)
1664 mcr &= ~MCR_LOOPBACK;
1665
1666 if (set & TIOCM_RTS)
1667 mcr |= MCR_RTS;
1668 if (set & TIOCM_DTR)
1669 mcr |= MCR_DTR;
1670 if (set & TIOCM_LOOP)
1671 mcr |= MCR_LOOPBACK;
1672
1673 mos7840_port->shadowMCR = mcr;
1674
3f542974
PS		 1675 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1676 if (status < 0) {
9c134a14 1677 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
87521c46 1678 return status;
3f542974
PS		 1679 }
1680
1681 return 0;
1682}
1683
1684/*****************************************************************************
1685 * mos7840_calc_baud_rate_divisor
1686 * this function calculates the proper baud rate divisor for the specified
1687 * baud rate.
1688 *****************************************************************************/
9c134a14
GKH		 1689static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1690 int baudRate, int *divisor,
880af9db 1691 __u16 *clk_sel_val)
3f542974 1692{
9c134a14 1693 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
3f542974
PS		 1694
1695 if (baudRate <= 115200) {
1696 *divisor = 115200 / baudRate;
1697 *clk_sel_val = 0x0;
1698 }
1699 if ((baudRate > 115200) && (baudRate <= 230400)) {
1700 *divisor = 230400 / baudRate;
1701 *clk_sel_val = 0x10;
1702 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1703 *divisor = 403200 / baudRate;
1704 *clk_sel_val = 0x20;
1705 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1706 *divisor = 460800 / baudRate;
1707 *clk_sel_val = 0x30;
1708 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1709 *divisor = 806400 / baudRate;
1710 *clk_sel_val = 0x40;
1711 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1712 *divisor = 921600 / baudRate;
1713 *clk_sel_val = 0x50;
1714 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1715 *divisor = 1572864 / baudRate;
1716 *clk_sel_val = 0x60;
1717 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1718 *divisor = 3145728 / baudRate;
1719 *clk_sel_val = 0x70;
1720 }
1721 return 0;
1722
1723#ifdef NOTMCS7840
1724
1725 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1726 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1727 *divisor = mos7840_divisor_table[i].Divisor;
1728 return 0;
1729 }
1730 }
1731
1732 /* After trying for all the standard baud rates *
1733 * Try calculating the divisor for this baud rate */
1734
1735 if (baudrate > 75 && baudrate < 230400) {
1736 /* get the divisor */
1737 custom = (__u16) (230400L / baudrate);
1738
1739 /* Check for round off */
1740 round1 = (__u16) (2304000L / baudrate);
1741 round = (__u16) (round1 - (custom * 10));
880af9db 1742 if (round > 4)
3f542974 1743 custom++;
3f542974
PS		 1744 *divisor = custom;
1745
9c134a14 1746 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
3f542974
PS		 1747 return 0;
1748 }
1749
9c134a14 1750 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
3f542974
PS		 1751 return -1;
1752#endif
1753}
1754
1755/*****************************************************************************
1756 * mos7840_send_cmd_write_baud_rate
1757 * this function sends the proper command to change the baud rate of the
1758 * specified port.
1759 *****************************************************************************/
1760
1761static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1762 int baudRate)
1763{
1764 int divisor = 0;
1765 int status;
1766 __u16 Data;
1767 unsigned char number;
1768 __u16 clk_sel_val;
1769 struct usb_serial_port *port;
1770
1771 if (mos7840_port == NULL)
1772 return -1;
1773
9c134a14
GKH		 1774 port = mos7840_port->port;
1775 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1776 return -1;
3f542974 1777
9c134a14 1778 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1779 return -1;
3f542974 1780
3f542974
PS		 1781 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1782
9c134a14
GKH		 1783 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__,
1784 mos7840_port->port->number, baudRate);
880af9db 1785 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1786 if (baudRate > 115200) {
1787#ifdef HW_flow_control
880af9db
AC		 1788 /* NOTE: need to see the pther register to modify */
1789 /* setting h/w flow control bit to 1 */
3f542974
PS		 1790 Data = 0x2b;
1791 mos7840_port->shadowMCR = Data;
880af9db
AC		 1792 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1793 Data);
3f542974 1794 if (status < 0) {
9c134a14 1795 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1796 return -1;
1797 }
1798#endif
1799
1800 } else {
1801#ifdef HW_flow_control
093ea2d3 1802 /* setting h/w flow control bit to 0 */
3f542974
PS		 1803 Data = 0xb;
1804 mos7840_port->shadowMCR = Data;
880af9db
AC		 1805 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1806 Data);
3f542974 1807 if (status < 0) {
9c134a14 1808 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1809 return -1;
1810 }
1811#endif
1812
1813 }
1814
880af9db 1815 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1816 clk_sel_val = 0x0;
1817 Data = 0x0;
9c134a14 1818 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
3f542974 1819 &clk_sel_val);
880af9db
AC		 1820 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1821 &Data);
3f542974 1822 if (status < 0) {
9c134a14 1823 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
3f542974
PS		 1824 return -1;
1825 }
1826 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1827 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1828 Data);
3f542974 1829 if (status < 0) {
9c134a14 1830 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1831 return -1;
1832 }
1833 /* Calculate the Divisor */
1834
1835 if (status) {
194343d9 1836 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1837 return status;
1838 }
1839 /* Enable access to divisor latch */
1840 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1841 mos7840_port->shadowLCR = Data;
1842 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1843
1844 /* Write the divisor */
1845 Data = (unsigned char)(divisor & 0xff);
9c134a14 1846 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
3f542974
PS		 1847 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1848
1849 Data = (unsigned char)((divisor & 0xff00) >> 8);
9c134a14 1850 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
3f542974
PS		 1851 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1852
1853 /* Disable access to divisor latch */
1854 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1855 mos7840_port->shadowLCR = Data;
1856 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1857
1858 }
3f542974
PS		 1859 return status;
1860}
1861
1862/*****************************************************************************
1863 * mos7840_change_port_settings
1864 * This routine is called to set the UART on the device to match
1865 * the specified new settings.
1866 *****************************************************************************/
1867
95da310e
AC		 1868static void mos7840_change_port_settings(struct tty_struct *tty,
1869 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1870{
3f542974
PS		 1871 int baud;
1872 unsigned cflag;
1873 unsigned iflag;
1874 __u8 lData;
1875 __u8 lParity;
1876 __u8 lStop;
1877 int status;
1878 __u16 Data;
1879 struct usb_serial_port *port;
1880 struct usb_serial *serial;
1881
1882 if (mos7840_port == NULL)
1883 return;
1884
9c134a14 1885 port = mos7840_port->port;
3f542974 1886
9c134a14 1887 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1888 return;
3f542974 1889
9c134a14 1890 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1891 return;
3f542974
PS		 1892
1893 serial = port->serial;
1894
3f542974 1895 if (!mos7840_port->open) {
9c134a14 1896 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1897 return;
1898 }
1899
3f542974
PS		 1900 lData = LCR_BITS_8;
1901 lStop = LCR_STOP_1;
1902 lParity = LCR_PAR_NONE;
1903
adc8d746
AC		 1904 cflag = tty->termios.c_cflag;
1905 iflag = tty->termios.c_iflag;
3f542974
PS		 1906
1907 /* Change the number of bits */
1908 if (cflag & CSIZE) {
1909 switch (cflag & CSIZE) {
1910 case CS5:
1911 lData = LCR_BITS_5;
1912 break;
1913
1914 case CS6:
1915 lData = LCR_BITS_6;
1916 break;
1917
1918 case CS7:
1919 lData = LCR_BITS_7;
1920 break;
1921 default:
1922 case CS8:
1923 lData = LCR_BITS_8;
1924 break;
1925 }
1926 }
1927 /* Change the Parity bit */
1928 if (cflag & PARENB) {
1929 if (cflag & PARODD) {
1930 lParity = LCR_PAR_ODD;
9c134a14 1931 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
3f542974
PS		 1932 } else {
1933 lParity = LCR_PAR_EVEN;
9c134a14 1934 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
3f542974
PS		 1935 }
1936
1937 } else {
9c134a14 1938 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
3f542974
PS		 1939 }
1940
880af9db 1941 if (cflag & CMSPAR)
3f542974 1942 lParity = lParity | 0x20;
3f542974
PS		 1943
1944 /* Change the Stop bit */
1945 if (cflag & CSTOPB) {
1946 lStop = LCR_STOP_2;
9c134a14 1947 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
3f542974
PS		 1948 } else {
1949 lStop = LCR_STOP_1;
9c134a14 1950 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
3f542974
PS		 1951 }
1952
1953 /* Update the LCR with the correct value */
1954 mos7840_port->shadowLCR &=
1955 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1956 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1957
9c134a14
GKH		 1958 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1959 mos7840_port->shadowLCR);
3f542974
PS		 1960 /* Disable Interrupts */
1961 Data = 0x00;
1962 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1963
1964 Data = 0x00;
1965 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1966
1967 Data = 0xcf;
1968 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1969
1970 /* Send the updated LCR value to the mos7840 */
1971 Data = mos7840_port->shadowLCR;
1972
1973 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1974
1975 Data = 0x00b;
1976 mos7840_port->shadowMCR = Data;
1977 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1978 Data = 0x00b;
1979 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1980
1981 /* set up the MCR register and send it to the mos7840 */
1982
1983 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 1984 if (cflag & CBAUD)
3f542974 1985 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 1986
880af9db 1987 if (cflag & CRTSCTS)
3f542974 1988 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 1989 else
3f542974 1990 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 1991
1992 Data = mos7840_port->shadowMCR;
1993 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1994
1995 /* Determine divisor based on baud rate */
1996 baud = tty_get_baud_rate(tty);
1997
1998 if (!baud) {
1999 /* pick a default, any default... */
9c134a14 2000 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
3f542974
PS		 2001 baud = 9600;
2002 }
2003
9c134a14 2004 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
3f542974
PS		 2005 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2006
2007 /* Enable Interrupts */
2008 Data = 0x0c;
2009 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2010
50de36f7 2011 if (mos7840_port->read_urb_busy == false) {
50de36f7 2012 mos7840_port->read_urb_busy = true;
3f542974 2013 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
3f542974 2014 if (status) {
9c134a14 2015 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 2016 status);
50de36f7 2017 mos7840_port->read_urb_busy = false;
3f542974
PS		 2018 }
2019 }
9c134a14
GKH		 2020 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
2021 mos7840_port->shadowLCR);
3f542974
PS		 2022}
2023
2024/*****************************************************************************
2025 * mos7840_set_termios
2026 * this function is called by the tty driver when it wants to change
2027 * the termios structure
2028 *****************************************************************************/
2029
95da310e
AC		 2030static void mos7840_set_termios(struct tty_struct *tty,
2031 struct usb_serial_port *port,
606d099c 2032 struct ktermios *old_termios)
3f542974
PS		 2033{
2034 int status;
2035 unsigned int cflag;
2036 struct usb_serial *serial;
2037 struct moschip_port *mos7840_port;
3363155b 2038
9c134a14 2039 if (mos7840_port_paranoia_check(port, __func__))
3f542974 2040 return;
3f542974
PS		 2041
2042 serial = port->serial;
2043
9c134a14 2044 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 2045 return;
3f542974
PS		 2046
2047 mos7840_port = mos7840_get_port_private(port);
2048
2049 if (mos7840_port == NULL)
2050 return;
2051
3f542974 2052 if (!mos7840_port->open) {
9c134a14 2053 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 2054 return;
2055 }
2056
9c134a14 2057 dev_dbg(&port->dev, "%s", "setting termios - \n");
3f542974 2058
adc8d746 2059 cflag = tty->termios.c_cflag;
3f542974 2060
9c134a14 2061 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
d9a80746 2062 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
9c134a14
GKH		 2063 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2064 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2065 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
3f542974
PS		 2066
2067 /* change the port settings to the new ones specified */
2068
95da310e 2069 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2070
2071 if (!mos7840_port->read_urb) {
9c134a14 2072 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
3f542974
PS		 2073 return;
2074 }
2075
50de36f7 2076 if (mos7840_port->read_urb_busy == false) {
50de36f7 2077 mos7840_port->read_urb_busy = true;
3f542974
PS		 2078 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2079 if (status) {
9c134a14 2080 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 2081 status);
50de36f7 2082 mos7840_port->read_urb_busy = false;
3f542974
PS		 2083 }
2084 }
3f542974
PS		 2085}
2086
2087/*****************************************************************************
2088 * mos7840_get_lsr_info - get line status register info
2089 *
2090 * Purpose: Let user call ioctl() to get info when the UART physically
2091 * is emptied. On bus types like RS485, the transmitter must
2092 * release the bus after transmitting. This must be done when
2093 * the transmit shift register is empty, not be done when the
2094 * transmit holding register is empty. This functionality
2095 * allows an RS485 driver to be written in user space.
2096 *****************************************************************************/
2097
95da310e 2098static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2099 unsigned int __user *value)
3f542974
PS		 2100{
2101 int count;
2102 unsigned int result = 0;
2103
95da310e 2104 count = mos7840_chars_in_buffer(tty);
9c134a14 2105 if (count == 0)
3f542974 2106 result = TIOCSER_TEMT;
3f542974
PS		 2107
2108 if (copy_to_user(value, &result, sizeof(int)))
2109 return -EFAULT;
2110 return 0;
2111}
2112
3f542974
PS		 2113/*****************************************************************************
2114 * mos7840_get_serial_info
2115 * function to get information about serial port
2116 *****************************************************************************/
2117
2118static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2119 struct serial_struct __user *retinfo)
3f542974
PS		 2120{
2121 struct serial_struct tmp;
2122
2123 if (mos7840_port == NULL)
2124 return -1;
2125
2126 if (!retinfo)
2127 return -EFAULT;
2128
2129 memset(&tmp, 0, sizeof(tmp));
2130
2131 tmp.type = PORT_16550A;
2132 tmp.line = mos7840_port->port->serial->minor;
2133 tmp.port = mos7840_port->port->number;
2134 tmp.irq = 0;
2135 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2136 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2137 tmp.baud_base = 9600;
2138 tmp.close_delay = 5 * HZ;
2139 tmp.closing_wait = 30 * HZ;
2140
2141 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2142 return -EFAULT;
2143 return 0;
2144}
2145
0bca1b91
AC		 2146static int mos7840_get_icount(struct tty_struct *tty,
2147 struct serial_icounter_struct *icount)
2148{
2149 struct usb_serial_port *port = tty->driver_data;
2150 struct moschip_port *mos7840_port;
2151 struct async_icount cnow;
2152
2153 mos7840_port = mos7840_get_port_private(port);
2154 cnow = mos7840_port->icount;
2155
2156 smp_rmb();
2157 icount->cts = cnow.cts;
2158 icount->dsr = cnow.dsr;
2159 icount->rng = cnow.rng;
2160 icount->dcd = cnow.dcd;
2161 icount->rx = cnow.rx;
2162 icount->tx = cnow.tx;
2163 icount->frame = cnow.frame;
2164 icount->overrun = cnow.overrun;
2165 icount->parity = cnow.parity;
2166 icount->brk = cnow.brk;
2167 icount->buf_overrun = cnow.buf_overrun;
2168
9c134a14
GKH		 2169 dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__,
2170 icount->rx, icount->tx);
0bca1b91
AC		 2171 return 0;
2172}
2173
3f542974
PS		 2174/*****************************************************************************
2175 * SerialIoctl
2176 * this function handles any ioctl calls to the driver
2177 *****************************************************************************/
2178
00a0d0d6 2179static int mos7840_ioctl(struct tty_struct *tty,
3f542974
PS		 2180 unsigned int cmd, unsigned long arg)
2181{
95da310e 2182 struct usb_serial_port *port = tty->driver_data;
97c4965d 2183 void __user *argp = (void __user *)arg;
3f542974 2184 struct moschip_port *mos7840_port;
3f542974
PS		 2185
2186 struct async_icount cnow;
2187 struct async_icount cprev;
3f542974 2188
9c134a14 2189 if (mos7840_port_paranoia_check(port, __func__))
3f542974 2190 return -1;
3f542974
PS		 2191
2192 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2193
2194 if (mos7840_port == NULL)
2195 return -1;
2196
9c134a14 2197 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
3f542974
PS		 2198
2199 switch (cmd) {
2200 /* return number of bytes available */
2201
3f542974 2202 case TIOCSERGETLSR:
9c134a14 2203 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
95da310e 2204 return mos7840_get_lsr_info(tty, argp);
3f542974 2205
3f542974 2206 case TIOCGSERIAL:
9c134a14 2207 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
97c4965d 2208 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2209
2210 case TIOCSSERIAL:
9c134a14 2211 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
3f542974
PS		 2212 break;
2213
2214 case TIOCMIWAIT:
9c134a14 2215 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__);
3f542974
PS		 2216 cprev = mos7840_port->icount;
2217 while (1) {
880af9db 2218 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974 2219 mos7840_port->delta_msr_cond = 0;
a14430db
JH		 2220 wait_event_interruptible(port->delta_msr_wait,
2221 (port->serial->disconnected ||
2222 mos7840_port->
3f542974
PS		 2223 delta_msr_cond == 1));
2224
2225 /* see if a signal did it */
2226 if (signal_pending(current))
2227 return -ERESTARTSYS;
a14430db
JH		 2228
2229 if (port->serial->disconnected)
2230 return -EIO;
2231
3f542974 2232 cnow = mos7840_port->icount;
0de9a702 2233 smp_rmb();
3f542974
PS		 2234 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2235 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2236 return -EIO; /* no change => error */
2237 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2238 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2239 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2240 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2241 return 0;
2242 }
2243 cprev = cnow;
2244 }
2245 /* NOTREACHED */
2246 break;
2247
3f542974
PS		 2248 default:
2249 break;
2250 }
3f542974
PS		 2251 return -ENOIOCTLCMD;
2252}
2253
0eafe4de
D		 2254static int mos7810_check(struct usb_serial *serial)
2255{
2256 int i, pass_count = 0;
2257 __u16 data = 0, mcr_data = 0;
2258 __u16 test_pattern = 0x55AA;
2259
2260 /* Store MCR setting */
2261 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2262 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2263 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2264
2265 for (i = 0; i < 16; i++) {
2266 /* Send the 1-bit test pattern out to MCS7810 test pin */
2267 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2268 MCS_WRREQ, MCS_WR_RTYPE,
2269 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2270 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2271
2272 /* Read the test pattern back */
2273 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2274 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2275 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2276
2277 /* If this is a MCS7810 device, both test patterns must match */
2278 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2279 break;
2280
2281 pass_count++;
2282 }
2283
2284 /* Restore MCR setting */
2285 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2286 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2287 0, MOS_WDR_TIMEOUT);
2288
2289 if (pass_count == 16)
2290 return 1;
2291
2292 return 0;
2293}
2294
3f542974
PS		 2295static int mos7840_calc_num_ports(struct usb_serial *serial)
2296{
0eafe4de 2297 __u16 data = 0x00;
093ea2d3
DL		 2298 int mos7840_num_ports;
2299
0eafe4de
D		 2300 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2301 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
093ea2d3
DL		 2302 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2303
0eafe4de
D		 2304 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||
2305 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {
2306 device_type = serial->dev->descriptor.idProduct;
093ea2d3 2307 } else {
0eafe4de
D		 2308 /* For a MCS7840 device GPIO0 must be set to 1 */
2309 if ((data & 0x01) == 1)
2310 device_type = MOSCHIP_DEVICE_ID_7840;
2311 else if (mos7810_check(serial))
2312 device_type = MOSCHIP_DEVICE_ID_7810;
2313 else
2314 device_type = MOSCHIP_DEVICE_ID_7820;
3f542974 2315 }
093ea2d3 2316
0eafe4de
D		 2317 mos7840_num_ports = (device_type >> 4) & 0x000F;
2318 serial->num_bulk_in = mos7840_num_ports;
2319 serial->num_bulk_out = mos7840_num_ports;
2320 serial->num_ports = mos7840_num_ports;
2321
3f542974
PS		 2322 return mos7840_num_ports;
2323}
2324
80c00750 2325static int mos7840_port_probe(struct usb_serial_port *port)
3f542974 2326{
80c00750 2327 struct usb_serial *serial = port->serial;
3f542974 2328 struct moschip_port *mos7840_port;
80c00750
JH		 2329 int status;
2330 int pnum;
3f542974 2331 __u16 Data;
3f542974 2332
3f542974
PS		 2333 /* we set up the pointers to the endpoints in the mos7840_open *
2334 * function, as the structures aren't created yet. */
2335
80c00750
JH		 2336 pnum = port->number - serial->minor;
2337
ae685eff
JH		 2338 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2339 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2340 if (mos7840_port == NULL) {
2341 dev_err(&port->dev, "%s - Out of memory\n", __func__);
2342 return -ENOMEM;
2343 }
3f542974 2344
ae685eff
JH		 2345 /* Initialize all port interrupt end point to port 0 int
2346 * endpoint. Our device has only one interrupt end point
2347 * common to all port */
2348
2349 mos7840_port->port = port;
2350 mos7840_set_port_private(port, mos7840_port);
2351 spin_lock_init(&mos7840_port->pool_lock);
2352
2353 /* minor is not initialised until later by
2354 * usb-serial.c:get_free_serial() and cannot therefore be used
2355 * to index device instances */
2356 mos7840_port->port_num = pnum + 1;
2357 dev_dbg(&port->dev, "port->number = %d\n", port->number);
2358 dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor);
2359 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2360 dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor);
2361
2362 if (mos7840_port->port_num == 1) {
2363 mos7840_port->SpRegOffset = 0x0;
2364 mos7840_port->ControlRegOffset = 0x1;
2365 mos7840_port->DcrRegOffset = 0x4;
2366 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2367 mos7840_port->SpRegOffset = 0x8;
2368 mos7840_port->ControlRegOffset = 0x9;
2369 mos7840_port->DcrRegOffset = 0x16;
2370 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2371 mos7840_port->SpRegOffset = 0xa;
2372 mos7840_port->ControlRegOffset = 0xb;
2373 mos7840_port->DcrRegOffset = 0x19;
2374 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2375 mos7840_port->SpRegOffset = 0xa;
2376 mos7840_port->ControlRegOffset = 0xb;
2377 mos7840_port->DcrRegOffset = 0x19;
2378 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2379 mos7840_port->SpRegOffset = 0xc;
2380 mos7840_port->ControlRegOffset = 0xd;
2381 mos7840_port->DcrRegOffset = 0x1c;
2382 }
2383 mos7840_dump_serial_port(port, mos7840_port);
2384 mos7840_set_port_private(port, mos7840_port);
2385
2386 /* enable rx_disable bit in control register */
2387 status = mos7840_get_reg_sync(port,
2388 mos7840_port->ControlRegOffset, &Data);
2389 if (status < 0) {
2390 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2391 goto out;
2392 } else
2393 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2394 Data |= 0x08; /* setting driver done bit */
2395 Data |= 0x04; /* sp1_bit to have cts change reflect in
2396 modem status reg */
2397
2398 /* Data |= 0x20; //rx_disable bit */
2399 status = mos7840_set_reg_sync(port,
2400 mos7840_port->ControlRegOffset, Data);
2401 if (status < 0) {
2402 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2403 goto out;
2404 } else
2405 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2406
2407 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2408 and 0x24 in DCR3 */
2409 Data = 0x01;
2410 status = mos7840_set_reg_sync(port,
2411 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2412 if (status < 0) {
2413 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2414 goto out;
2415 } else
2416 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
3f542974 2417
ae685eff
JH		 2418 Data = 0x05;
2419 status = mos7840_set_reg_sync(port,
2420 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2421 if (status < 0) {
2422 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2423 goto out;
2424 } else
2425 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
3f542974 2426
ae685eff
JH		 2427 Data = 0x24;
2428 status = mos7840_set_reg_sync(port,
2429 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2430 if (status < 0) {
2431 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2432 goto out;
2433 } else
2434 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
3f542974 2435
ae685eff
JH		 2436 /* write values in clkstart0x0 and clkmulti 0x20 */
2437 Data = 0x0;
2438 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2439 if (status < 0) {
2440 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2441 goto out;
2442 } else
2443 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
3f542974 2444
ae685eff
JH		 2445 Data = 0x20;
2446 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2447 if (status < 0) {
2448 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2449 goto error;
2450 } else
2451 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
3f542974 2452
ae685eff
JH		 2453 /* write value 0x0 to scratchpad register */
2454 Data = 0x00;
2455 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2456 if (status < 0) {
2457 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2458 goto out;
2459 } else
2460 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2461
2462 /* Zero Length flag register */
2463 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2464 Data = 0xff;
80c00750 2465 status = mos7840_set_reg_sync(port,
ae685eff
JH		 2466 (__u16) (ZLP_REG1 +
2467 ((__u16)mos7840_port->port_num)), Data);
2468 dev_dbg(&port->dev, "ZLIP offset %x\n",
2469 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
3f542974 2470 if (status < 0) {
ae685eff
JH		 2471 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2472 goto out;
3f542974 2473 } else
ae685eff
JH		 2474 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2475 } else {
2476 Data = 0xff;
80c00750 2477 status = mos7840_set_reg_sync(port,
ae685eff
JH		 2478 (__u16) (ZLP_REG1 +
2479 ((__u16)mos7840_port->port_num) - 0x1), Data);
2480 dev_dbg(&port->dev, "ZLIP offset %x\n",
2481 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
3f542974 2482 if (status < 0) {
ae685eff
JH		 2483 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2484 goto out;
3f542974 2485 } else
ae685eff 2486 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
3f542974 2487
ae685eff
JH		 2488 }
2489 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2490 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2491 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2492 GFP_KERNEL);
2493 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2494 !mos7840_port->dr) {
2495 status = -ENOMEM;
2496 goto error;
2497 }
0eafe4de 2498
ae685eff 2499 mos7840_port->has_led = false;
0eafe4de 2500
ae685eff
JH		 2501 /* Initialize LED timers */
2502 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2503 mos7840_port->has_led = true;
0eafe4de 2504
ae685eff
JH		 2505 init_timer(&mos7840_port->led_timer1);
2506 mos7840_port->led_timer1.function = mos7840_led_off;
2507 mos7840_port->led_timer1.expires =
2508 jiffies + msecs_to_jiffies(LED_ON_MS);
2509 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
0eafe4de 2510
ae685eff
JH		 2511 init_timer(&mos7840_port->led_timer2);
2512 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2513 mos7840_port->led_timer2.expires =
2514 jiffies + msecs_to_jiffies(LED_OFF_MS);
2515 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
0eafe4de 2516
ae685eff 2517 mos7840_port->led_flag = false;
3f542974 2518
ae685eff
JH		 2519 /* Turn off LED */
2520 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2521 }
2522out:
80c00750
JH		 2523 if (pnum == serial->num_ports - 1) {
2524 /* Zero Length flag enable */
2525 Data = 0x0f;
2526 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2527 if (status < 0) {
2528 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2529 goto error;
2530 } else
2531 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2532
2533 /* setting configuration feature to one */
2534 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2535 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2536 MOS_WDR_TIMEOUT);
2537 }
3f542974 2538 return 0;
0de9a702 2539error:
80c00750
JH		 2540 kfree(mos7840_port->dr);
2541 kfree(mos7840_port->ctrl_buf);
2542 usb_free_urb(mos7840_port->control_urb);
2543 kfree(mos7840_port);
0de9a702 2544
0de9a702 2545 return status;
3f542974
PS		 2546}
2547
80c00750 2548static int mos7840_port_remove(struct usb_serial_port *port)
3f542974 2549{
3f542974 2550 struct moschip_port *mos7840_port;
3f542974 2551
80c00750 2552 mos7840_port = mos7840_get_port_private(port);
3f542974 2553
80c00750
JH		 2554 if (mos7840_port->has_led) {
2555 /* Turn off LED */
2556 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
3f542974 2557
80c00750
JH		 2558 del_timer_sync(&mos7840_port->led_timer1);
2559 del_timer_sync(&mos7840_port->led_timer2);
f9c99bb8 2560 }
80c00750
JH		 2561 usb_kill_urb(mos7840_port->control_urb);
2562 usb_free_urb(mos7840_port->control_urb);
2563 kfree(mos7840_port->ctrl_buf);
2564 kfree(mos7840_port->dr);
2565 kfree(mos7840_port);
f9c99bb8 2566
80c00750 2567 return 0;
3f542974
PS		 2568}
2569
2570static struct usb_serial_driver moschip7840_4port_device = {
2571 .driver = {
2572 .owner = THIS_MODULE,
2573 .name = "mos7840",
2574 },
2575 .description = DRIVER_DESC,
68e24113 2576 .id_table = id_table,
3f542974 2577 .num_ports = 4,
3f542974
PS		 2578 .open = mos7840_open,
2579 .close = mos7840_close,
2580 .write = mos7840_write,
2581 .write_room = mos7840_write_room,
2582 .chars_in_buffer = mos7840_chars_in_buffer,
2583 .throttle = mos7840_throttle,
2584 .unthrottle = mos7840_unthrottle,
2585 .calc_num_ports = mos7840_calc_num_ports,
2586#ifdef MCSSerialProbe
2587 .probe = mos7840_serial_probe,
2588#endif
2589 .ioctl = mos7840_ioctl,
2590 .set_termios = mos7840_set_termios,
2591 .break_ctl = mos7840_break,
2592 .tiocmget = mos7840_tiocmget,
2593 .tiocmset = mos7840_tiocmset,
0bca1b91 2594 .get_icount = mos7840_get_icount,
80c00750
JH		 2595 .port_probe = mos7840_port_probe,
2596 .port_remove = mos7840_port_remove,
3f542974
PS		 2597 .read_bulk_callback = mos7840_bulk_in_callback,
2598 .read_int_callback = mos7840_interrupt_callback,
2599};
2600
4d2a7aff
AS		 2601static struct usb_serial_driver * const serial_drivers[] = {
2602 &moschip7840_4port_device, NULL
2603};
2604
68e24113 2605module_usb_serial_driver(serial_drivers, id_table);
3f542974 2606
3f542974
PS		 2607MODULE_DESCRIPTION(DRIVER_DESC);
2608MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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