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USB: mos7840: remove smp barriers from icount handling
[people/arne_f/kernel.git] / drivers / usb / serial / mos7840.c
CommitLineData
3f542974
PS		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 *
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
18 *
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
22 *
23 */
24
25#include <linux/kernel.h>
26#include <linux/errno.h>
27#include <linux/init.h>
28#include <linux/slab.h>
29#include <linux/tty.h>
30#include <linux/tty_driver.h>
31#include <linux/tty_flip.h>
32#include <linux/module.h>
33#include <linux/serial.h>
34#include <linux/usb.h>
35#include <linux/usb/serial.h>
880af9db 36#include <linux/uaccess.h>
3f542974 37
3f542974
PS		 38#define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
39
40/*
41 * 16C50 UART register defines
42 */
43
44#define LCR_BITS_5 0x00 /* 5 bits/char */
45#define LCR_BITS_6 0x01 /* 6 bits/char */
46#define LCR_BITS_7 0x02 /* 7 bits/char */
47#define LCR_BITS_8 0x03 /* 8 bits/char */
48#define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
49
50#define LCR_STOP_1 0x00 /* 1 stop bit */
51#define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
52#define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
53#define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
54
55#define LCR_PAR_NONE 0x00 /* No parity */
56#define LCR_PAR_ODD 0x08 /* Odd parity */
57#define LCR_PAR_EVEN 0x18 /* Even parity */
58#define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
59#define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
60#define LCR_PAR_MASK 0x38 /* Mask for parity field */
61
62#define LCR_SET_BREAK 0x40 /* Set Break condition */
63#define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
64
65#define MCR_DTR 0x01 /* Assert DTR */
66#define MCR_RTS 0x02 /* Assert RTS */
67#define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
68#define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
69#define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
70#define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
71
72#define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
73#define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
74#define MOS7840_MSR_RI 0x40 /* Current state of RI */
75#define MOS7840_MSR_CD 0x80 /* Current state of CD */
76
77/*
78 * Defines used for sending commands to port
79 */
80
1e658489 81#define MOS_WDR_TIMEOUT 5000 /* default urb timeout */
3f542974
PS		 82
83#define MOS_PORT1 0x0200
84#define MOS_PORT2 0x0300
85#define MOS_VENREG 0x0000
86#define MOS_MAX_PORT 0x02
87#define MOS_WRITE 0x0E
88#define MOS_READ 0x0D
89
90/* Requests */
91#define MCS_RD_RTYPE 0xC0
92#define MCS_WR_RTYPE 0x40
93#define MCS_RDREQ 0x0D
94#define MCS_WRREQ 0x0E
95#define MCS_CTRL_TIMEOUT 500
96#define VENDOR_READ_LENGTH (0x01)
97
98#define MAX_NAME_LEN 64
99
880af9db
AC		 100#define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
101#define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
3f542974
PS		 102
103/* For higher baud Rates use TIOCEXBAUD */
104#define TIOCEXBAUD 0x5462
105
106/* vendor id and device id defines */
107
11e1abb4 108/* The native mos7840/7820 component */
3f542974
PS		 109#define USB_VENDOR_ID_MOSCHIP 0x9710
110#define MOSCHIP_DEVICE_ID_7840 0x7840
111#define MOSCHIP_DEVICE_ID_7820 0x7820
0eafe4de 112#define MOSCHIP_DEVICE_ID_7810 0x7810
11e1abb4
DL		 113/* The native component can have its vendor/device id's overridden
114 * in vendor-specific implementations. Such devices can be handled
68e24113 115 * by making a change here, in id_table.
11e1abb4 116 */
870408c8
DL		 117#define USB_VENDOR_ID_BANDB 0x0856
118#define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
119#define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
120#define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
121#define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
122#define BANDB_DEVICE_ID_US9ML2_2 0xAC29
123#define BANDB_DEVICE_ID_US9ML2_4 0xAC30
124#define BANDB_DEVICE_ID_USPTL4_2 0xAC31
125#define BANDB_DEVICE_ID_USPTL4_4 0xAC32
126#define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
127#define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
128#define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
129#define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
130#define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
3f542974 131
9d498bea
RL		 132/* This driver also supports
133 * ATEN UC2324 device using Moschip MCS7840
134 * ATEN UC2322 device using Moschip MCS7820
135 */
e9b8cffa
TC		 136#define USB_VENDOR_ID_ATENINTL 0x0557
137#define ATENINTL_DEVICE_ID_UC2324 0x2011
9d498bea 138#define ATENINTL_DEVICE_ID_UC2322 0x7820
e9b8cffa 139
11e1abb4 140/* Interrupt Routine Defines */
3f542974
PS		 141
142#define SERIAL_IIR_RLS 0x06
143#define SERIAL_IIR_MS 0x00
144
145/*
146 * Emulation of the bit mask on the LINE STATUS REGISTER.
147 */
148#define SERIAL_LSR_DR 0x0001
149#define SERIAL_LSR_OE 0x0002
150#define SERIAL_LSR_PE 0x0004
151#define SERIAL_LSR_FE 0x0008
152#define SERIAL_LSR_BI 0x0010
153
154#define MOS_MSR_DELTA_CTS 0x10
155#define MOS_MSR_DELTA_DSR 0x20
156#define MOS_MSR_DELTA_RI 0x40
157#define MOS_MSR_DELTA_CD 0x80
158
880af9db 159/* Serial Port register Address */
3f542974
PS		 160#define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
161#define FIFO_CONTROL_REGISTER ((__u16)(0x02))
162#define LINE_CONTROL_REGISTER ((__u16)(0x03))
163#define MODEM_CONTROL_REGISTER ((__u16)(0x04))
164#define LINE_STATUS_REGISTER ((__u16)(0x05))
165#define MODEM_STATUS_REGISTER ((__u16)(0x06))
166#define SCRATCH_PAD_REGISTER ((__u16)(0x07))
167#define DIVISOR_LATCH_LSB ((__u16)(0x00))
168#define DIVISOR_LATCH_MSB ((__u16)(0x01))
169
170#define CLK_MULTI_REGISTER ((__u16)(0x02))
171#define CLK_START_VALUE_REGISTER ((__u16)(0x03))
093ea2d3 172#define GPIO_REGISTER ((__u16)(0x07))
3f542974
PS		 173
174#define SERIAL_LCR_DLAB ((__u16)(0x0080))
175
176/*
177 * URB POOL related defines
178 */
179#define NUM_URBS 16 /* URB Count */
180#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
181
0eafe4de
D		 182/* LED on/off milliseconds*/
183#define LED_ON_MS 500
184#define LED_OFF_MS 500
185
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 */
c9fac853 409 if (new_msr & MOS_MSR_DELTA_CTS)
3f542974 410 icount->cts++;
c9fac853 411 if (new_msr & MOS_MSR_DELTA_DSR)
3f542974 412 icount->dsr++;
c9fac853 413 if (new_msr & MOS_MSR_DELTA_CD)
3f542974 414 icount->dcd++;
c9fac853 415 if (new_msr & MOS_MSR_DELTA_RI)
3f542974 416 icount->rng++;
e670c6af
JH		 417
418 mos7840_port->delta_msr_cond = 1;
a14430db 419 wake_up_interruptible(&port->port->delta_msr_wait);
3f542974 420 }
3f542974
PS		 421}
422
0de9a702 423static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
3f542974
PS		 424{
425 struct async_icount *icount;
426
3f542974 427 if (new_lsr & SERIAL_LSR_BI) {
880af9db
AC		 428 /*
429 * Parity and Framing errors only count if they
430 * occur exclusive of a break being
431 * received.
432 */
3f542974
PS		 433 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
434 }
435
436 /* update input line counters */
437 icount = &port->icount;
c9fac853 438 if (new_lsr & SERIAL_LSR_BI)
3f542974 439 icount->brk++;
c9fac853 440 if (new_lsr & SERIAL_LSR_OE)
3f542974 441 icount->overrun++;
c9fac853 442 if (new_lsr & SERIAL_LSR_PE)
3f542974 443 icount->parity++;
c9fac853 444 if (new_lsr & SERIAL_LSR_FE)
3f542974 445 icount->frame++;
3f542974
PS		 446}
447
448/************************************************************************/
449/************************************************************************/
450/* U S B C A L L B A C K F U N C T I O N S */
451/* U S B C A L L B A C K F U N C T I O N S */
452/************************************************************************/
453/************************************************************************/
454
7d12e780 455static void mos7840_control_callback(struct urb *urb)
3f542974
PS		 456{
457 unsigned char *data;
458 struct moschip_port *mos7840_port;
9c134a14 459 struct device *dev = &urb->dev->dev;
3f542974 460 __u8 regval = 0x0;
0643c724 461 int status = urb->status;
3f542974 462
cdc97792 463 mos7840_port = urb->context;
0de9a702 464
0643c724 465 switch (status) {
3f542974
PS		 466 case 0:
467 /* success */
468 break;
469 case -ECONNRESET:
470 case -ENOENT:
471 case -ESHUTDOWN:
472 /* this urb is terminated, clean up */
9c134a14 473 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
3f542974
PS		 474 return;
475 default:
9c134a14 476 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
28c3ae9a 477 return;
3f542974
PS		 478 }
479
9c134a14
GKH		 480 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
481 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
482 mos7840_port->MsrLsr, mos7840_port->port_num);
3f542974
PS		 483 data = urb->transfer_buffer;
484 regval = (__u8) data[0];
9c134a14 485 dev_dbg(dev, "%s data is %x\n", __func__, regval);
3f542974
PS		 486 if (mos7840_port->MsrLsr == 0)
487 mos7840_handle_new_msr(mos7840_port, regval);
488 else if (mos7840_port->MsrLsr == 1)
489 mos7840_handle_new_lsr(mos7840_port, regval);
3f542974
PS		 490}
491
492static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
880af9db 493 __u16 *val)
3f542974
PS		 494{
495 struct usb_device *dev = mcs->port->serial->dev;
0de9a702
ON		 496 struct usb_ctrlrequest *dr = mcs->dr;
497 unsigned char *buffer = mcs->ctrl_buf;
498 int ret;
3f542974 499
3f542974
PS		 500 dr->bRequestType = MCS_RD_RTYPE;
501 dr->bRequest = MCS_RDREQ;
880af9db 502 dr->wValue = cpu_to_le16(Wval); /* 0 */
3f542974
PS		 503 dr->wIndex = cpu_to_le16(reg);
504 dr->wLength = cpu_to_le16(2);
505
506 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
507 (unsigned char *)dr, buffer, 2,
508 mos7840_control_callback, mcs);
509 mcs->control_urb->transfer_buffer_length = 2;
510 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
511 return ret;
512}
513
0eafe4de
D		 514static void mos7840_set_led_callback(struct urb *urb)
515{
516 switch (urb->status) {
517 case 0:
518 /* Success */
519 break;
520 case -ECONNRESET:
521 case -ENOENT:
522 case -ESHUTDOWN:
523 /* This urb is terminated, clean up */
9c134a14
GKH		 524 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
525 __func__, urb->status);
0eafe4de
D		 526 break;
527 default:
9c134a14
GKH		 528 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
529 __func__, urb->status);
0eafe4de
D		 530 }
531}
532
533static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
534 __u16 reg)
535{
536 struct usb_device *dev = mcs->port->serial->dev;
537 struct usb_ctrlrequest *dr = mcs->dr;
538
539 dr->bRequestType = MCS_WR_RTYPE;
540 dr->bRequest = MCS_WRREQ;
541 dr->wValue = cpu_to_le16(wval);
542 dr->wIndex = cpu_to_le16(reg);
543 dr->wLength = cpu_to_le16(0);
544
545 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),
546 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
547
548 usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
549}
550
551static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
552 __u16 val)
553{
554 struct usb_device *dev = port->serial->dev;
555
556 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
557 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
558}
559
560static void mos7840_led_off(unsigned long arg)
561{
562 struct moschip_port *mcs = (struct moschip_port *) arg;
563
564 /* Turn off LED */
565 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
566 mod_timer(&mcs->led_timer2,
567 jiffies + msecs_to_jiffies(LED_OFF_MS));
568}
569
570static void mos7840_led_flag_off(unsigned long arg)
571{
572 struct moschip_port *mcs = (struct moschip_port *) arg;
573
574 mcs->led_flag = false;
575}
576
3f542974
PS		 577/*****************************************************************************
578 * mos7840_interrupt_callback
579 * this is the callback function for when we have received data on the
580 * interrupt endpoint.
581 *****************************************************************************/
582
7d12e780 583static void mos7840_interrupt_callback(struct urb *urb)
3f542974
PS		 584{
585 int result;
586 int length;
587 struct moschip_port *mos7840_port;
588 struct usb_serial *serial;
589 __u16 Data;
590 unsigned char *data;
591 __u8 sp[5], st;
0de9a702
ON		 592 int i, rv = 0;
593 __u16 wval, wreg = 0;
0643c724 594 int status = urb->status;
3f542974 595
0643c724 596 switch (status) {
3f542974
PS		 597 case 0:
598 /* success */
599 break;
600 case -ECONNRESET:
601 case -ENOENT:
602 case -ESHUTDOWN:
603 /* this urb is terminated, clean up */
9c134a14
GKH		 604 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
605 __func__, status);
3f542974
PS		 606 return;
607 default:
9c134a14
GKH		 608 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
609 __func__, status);
3f542974
PS		 610 goto exit;
611 }
612
613 length = urb->actual_length;
614 data = urb->transfer_buffer;
615
cdc97792 616 serial = urb->context;
3f542974
PS		 617
618 /* Moschip get 5 bytes
619 * Byte 1 IIR Port 1 (port.number is 0)
620 * Byte 2 IIR Port 2 (port.number is 1)
621 * Byte 3 IIR Port 3 (port.number is 2)
622 * Byte 4 IIR Port 4 (port.number is 3)
623 * Byte 5 FIFO status for both */
624
625 if (length && length > 5) {
9c134a14 626 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
3f542974
PS		 627 return;
628 }
629
630 sp[0] = (__u8) data[0];
631 sp[1] = (__u8) data[1];
632 sp[2] = (__u8) data[2];
633 sp[3] = (__u8) data[3];
634 st = (__u8) data[4];
635
636 for (i = 0; i < serial->num_ports; i++) {
637 mos7840_port = mos7840_get_port_private(serial->port[i]);
638 wval =
639 (((__u16) serial->port[i]->number -
640 (__u16) (serial->minor)) + 1) << 8;
641 if (mos7840_port->open) {
642 if (sp[i] & 0x01) {
9c134a14 643 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
3f542974
PS		 644 } else {
645 switch (sp[i] & 0x0f) {
646 case SERIAL_IIR_RLS:
9c134a14
GKH		 647 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
648 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
3f542974 649 mos7840_port->MsrLsr = 1;
0de9a702 650 wreg = LINE_STATUS_REGISTER;
3f542974
PS		 651 break;
652 case SERIAL_IIR_MS:
9c134a14 653 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
3f542974 654 mos7840_port->MsrLsr = 0;
0de9a702 655 wreg = MODEM_STATUS_REGISTER;
3f542974
PS		 656 break;
657 }
e681b66f 658 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
3f542974
PS		 659 }
660 }
661 }
880af9db
AC		 662 if (!(rv < 0))
663 /* the completion handler for the control urb will resubmit */
0de9a702
ON		 664 return;
665exit:
3f542974
PS		 666 result = usb_submit_urb(urb, GFP_ATOMIC);
667 if (result) {
668 dev_err(&urb->dev->dev,
669 "%s - Error %d submitting interrupt urb\n",
441b62c1 670 __func__, result);
3f542974 671 }
3f542974
PS		 672}
673
674static int mos7840_port_paranoia_check(struct usb_serial_port *port,
675 const char *function)
676{
677 if (!port) {
9c134a14 678 pr_debug("%s - port == NULL\n", function);
3f542974
PS		 679 return -1;
680 }
681 if (!port->serial) {
9c134a14 682 pr_debug("%s - port->serial == NULL\n", function);
3f542974
PS		 683 return -1;
684 }
685
686 return 0;
687}
688
689/* Inline functions to check the sanity of a pointer that is passed to us */
690static int mos7840_serial_paranoia_check(struct usb_serial *serial,
691 const char *function)
692{
693 if (!serial) {
9c134a14 694 pr_debug("%s - serial == NULL\n", function);
3f542974
PS		 695 return -1;
696 }
697 if (!serial->type) {
9c134a14 698 pr_debug("%s - serial->type == NULL!\n", function);
3f542974
PS		 699 return -1;
700 }
701
702 return 0;
703}
704
705static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
706 const char *function)
707{
708 /* if no port was specified, or it fails a paranoia check */
709 if (!port ||
710 mos7840_port_paranoia_check(port, function) ||
711 mos7840_serial_paranoia_check(port->serial, function)) {
880af9db
AC		 712 /* then say that we don't have a valid usb_serial thing,
713 * which will end up genrating -ENODEV return values */
3f542974
PS		 714 return NULL;
715 }
716
717 return port->serial;
718}
719
720/*****************************************************************************
721 * mos7840_bulk_in_callback
722 * this is the callback function for when we have received data on the
723 * bulk in endpoint.
724 *****************************************************************************/
725
7d12e780 726static void mos7840_bulk_in_callback(struct urb *urb)
3f542974 727{
0643c724 728 int retval;
3f542974
PS		 729 unsigned char *data;
730 struct usb_serial *serial;
731 struct usb_serial_port *port;
732 struct moschip_port *mos7840_port;
0643c724 733 int status = urb->status;
3f542974 734
cdc97792 735 mos7840_port = urb->context;
9c134a14 736 if (!mos7840_port)
50de36f7 737 return;
50de36f7
GKH		 738
739 if (status) {
9c134a14 740 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
50de36f7 741 mos7840_port->read_urb_busy = false;
3f542974
PS		 742 return;
743 }
744
9c134a14 745 port = mos7840_port->port;
441b62c1 746 if (mos7840_port_paranoia_check(port, __func__)) {
50de36f7 747 mos7840_port->read_urb_busy = false;
3f542974
PS		 748 return;
749 }
750
441b62c1 751 serial = mos7840_get_usb_serial(port, __func__);
3f542974 752 if (!serial) {
50de36f7 753 mos7840_port->read_urb_busy = false;
3f542974
PS		 754 return;
755 }
756
3f542974 757 data = urb->transfer_buffer;
59d33f2f 758 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
3f542974 759
3f542974 760 if (urb->actual_length) {
05c7cd39 761 struct tty_port *tport = &mos7840_port->port->port;
2e124b4a
JS		 762 tty_insert_flip_string(tport, data, urb->actual_length);
763 tty_flip_buffer_push(tport);
3f542974 764 mos7840_port->icount.rx += urb->actual_length;
9c134a14 765 dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx);
3f542974
PS		 766 }
767
768 if (!mos7840_port->read_urb) {
9c134a14 769 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
50de36f7 770 mos7840_port->read_urb_busy = false;
3f542974
PS		 771 return;
772 }
773
0eafe4de
D		 774 /* Turn on LED */
775 if (mos7840_port->has_led && !mos7840_port->led_flag) {
776 mos7840_port->led_flag = true;
777 mos7840_set_led_async(mos7840_port, 0x0301,
778 MODEM_CONTROL_REGISTER);
779 mod_timer(&mos7840_port->led_timer1,
780 jiffies + msecs_to_jiffies(LED_ON_MS));
781 }
3f542974 782
50de36f7 783 mos7840_port->read_urb_busy = true;
0643c724 784 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
0de9a702 785
0643c724 786 if (retval) {
9c134a14 787 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
50de36f7 788 mos7840_port->read_urb_busy = false;
3f542974
PS		 789 }
790}
791
792/*****************************************************************************
793 * mos7840_bulk_out_data_callback
880af9db
AC		 794 * this is the callback function for when we have finished sending
795 * serial data on the bulk out endpoint.
3f542974
PS		 796 *****************************************************************************/
797
7d12e780 798static void mos7840_bulk_out_data_callback(struct urb *urb)
3f542974
PS		 799{
800 struct moschip_port *mos7840_port;
9c134a14 801 struct usb_serial_port *port;
3f542974 802 struct tty_struct *tty;
0643c724 803 int status = urb->status;
0de9a702
ON		 804 int i;
805
cdc97792 806 mos7840_port = urb->context;
9c134a14 807 port = mos7840_port->port;
0de9a702
ON		 808 spin_lock(&mos7840_port->pool_lock);
809 for (i = 0; i < NUM_URBS; i++) {
810 if (urb == mos7840_port->write_urb_pool[i]) {
811 mos7840_port->busy[i] = 0;
812 break;
813 }
814 }
815 spin_unlock(&mos7840_port->pool_lock);
816
0643c724 817 if (status) {
9c134a14 818 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
3f542974
PS		 819 return;
820 }
821
9c134a14 822 if (mos7840_port_paranoia_check(port, __func__))
3f542974 823 return;
3f542974 824
9c134a14 825 tty = tty_port_tty_get(&port->port);
b963a844
JS		 826 if (tty && mos7840_port->open)
827 tty_wakeup(tty);
4a90f09b 828 tty_kref_put(tty);
3f542974
PS		 829
830}
831
832/************************************************************************/
833/* 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 */
834/************************************************************************/
835#ifdef MCSSerialProbe
836static int mos7840_serial_probe(struct usb_serial *serial,
837 const struct usb_device_id *id)
838{
839
840 /*need to implement the mode_reg reading and updating\
841 structures usb_serial_ device_type\
842 (i.e num_ports, num_bulkin,bulkout etc) */
843 /* Also we can update the changes attach */
844 return 1;
845}
846#endif
847
848/*****************************************************************************
849 * mos7840_open
850 * this function is called by the tty driver when a port is opened
851 * If successful, we return 0
852 * Otherwise we return a negative error number.
853 *****************************************************************************/
854
a509a7e4 855static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
3f542974
PS		 856{
857 int response;
858 int j;
859 struct usb_serial *serial;
860 struct urb *urb;
861 __u16 Data;
862 int status;
863 struct moschip_port *mos7840_port;
0de9a702 864 struct moschip_port *port0;
3f542974 865
9c134a14 866 if (mos7840_port_paranoia_check(port, __func__))
3f542974 867 return -ENODEV;
3f542974 868
3f542974
PS		 869 serial = port->serial;
870
9c134a14 871 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 872 return -ENODEV;
3f542974
PS		 873
874 mos7840_port = mos7840_get_port_private(port);
0de9a702 875 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 876
0de9a702 877 if (mos7840_port == NULL || port0 == NULL)
3f542974
PS		 878 return -ENODEV;
879
880 usb_clear_halt(serial->dev, port->write_urb->pipe);
881 usb_clear_halt(serial->dev, port->read_urb->pipe);
0de9a702 882 port0->open_ports++;
3f542974
PS		 883
884 /* Initialising the write urb pool */
885 for (j = 0; j < NUM_URBS; ++j) {
0de9a702 886 urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974
PS		 887 mos7840_port->write_urb_pool[j] = urb;
888
889 if (urb == NULL) {
194343d9 890 dev_err(&port->dev, "No more urbs???\n");
3f542974
PS		 891 continue;
892 }
893
880af9db
AC		 894 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
895 GFP_KERNEL);
3f542974 896 if (!urb->transfer_buffer) {
0de9a702
ON		 897 usb_free_urb(urb);
898 mos7840_port->write_urb_pool[j] = NULL;
194343d9
GKH		 899 dev_err(&port->dev,
900 "%s-out of memory for urb buffers.\n",
901 __func__);
3f542974
PS		 902 continue;
903 }
904 }
905
906/*****************************************************************************
907 * Initialize MCS7840 -- Write Init values to corresponding Registers
908 *
909 * Register Index
910 * 1 : IER
911 * 2 : FCR
912 * 3 : LCR
913 * 4 : MCR
914 *
915 * 0x08 : SP1/2 Control Reg
916 *****************************************************************************/
917
880af9db 918 /* NEED to check the following Block */
3f542974 919
3f542974
PS		 920 Data = 0x0;
921 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
922 if (status < 0) {
9c134a14 923 dev_dbg(&port->dev, "Reading Spreg failed\n");
3f542974
PS		 924 return -1;
925 }
926 Data |= 0x80;
927 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
928 if (status < 0) {
9c134a14 929 dev_dbg(&port->dev, "writing Spreg failed\n");
3f542974
PS		 930 return -1;
931 }
932
933 Data &= ~0x80;
934 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
935 if (status < 0) {
9c134a14 936 dev_dbg(&port->dev, "writing Spreg failed\n");
3f542974
PS		 937 return -1;
938 }
880af9db 939 /* End of block to be checked */
3f542974 940
3f542974 941 Data = 0x0;
880af9db
AC		 942 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
943 &Data);
3f542974 944 if (status < 0) {
9c134a14 945 dev_dbg(&port->dev, "Reading Controlreg failed\n");
3f542974
PS		 946 return -1;
947 }
880af9db
AC		 948 Data |= 0x08; /* Driver done bit */
949 Data |= 0x20; /* rx_disable */
950 status = mos7840_set_reg_sync(port,
951 mos7840_port->ControlRegOffset, Data);
3f542974 952 if (status < 0) {
9c134a14 953 dev_dbg(&port->dev, "writing Controlreg failed\n");
3f542974
PS		 954 return -1;
955 }
880af9db
AC		 956 /* do register settings here */
957 /* Set all regs to the device default values. */
958 /***********************************
959 * First Disable all interrupts.
960 ***********************************/
3f542974 961 Data = 0x00;
3f542974
PS		 962 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
963 if (status < 0) {
9c134a14 964 dev_dbg(&port->dev, "disabling interrupts failed\n");
3f542974
PS		 965 return -1;
966 }
880af9db 967 /* Set FIFO_CONTROL_REGISTER to the default value */
3f542974 968 Data = 0x00;
3f542974
PS		 969 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
970 if (status < 0) {
9c134a14 971 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
3f542974
PS		 972 return -1;
973 }
974
975 Data = 0xcf;
3f542974
PS		 976 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
977 if (status < 0) {
9c134a14 978 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
3f542974
PS		 979 return -1;
980 }
981
982 Data = 0x03;
3f542974
PS		 983 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
984 mos7840_port->shadowLCR = Data;
985
986 Data = 0x0b;
3f542974
PS		 987 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
988 mos7840_port->shadowMCR = Data;
989
990 Data = 0x00;
3f542974
PS		 991 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
992 mos7840_port->shadowLCR = Data;
993
880af9db 994 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 995 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
996
997 Data = 0x0c;
3f542974
PS		 998 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
999
1000 Data = 0x0;
3f542974
PS		 1001 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1002
1003 Data = 0x00;
3f542974
PS		 1004 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1005
1006 Data = Data & ~SERIAL_LCR_DLAB;
3f542974
PS		 1007 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1008 mos7840_port->shadowLCR = Data;
1009
880af9db 1010 /* clearing Bulkin and Bulkout Fifo */
3f542974 1011 Data = 0x0;
3f542974
PS		 1012 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1013
1014 Data = Data | 0x0c;
3f542974
PS		 1015 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1016
1017 Data = Data & ~0x0c;
3f542974 1018 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
880af9db 1019 /* Finally enable all interrupts */
3f542974 1020 Data = 0x0c;
3f542974
PS		 1021 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1022
880af9db 1023 /* clearing rx_disable */
3f542974 1024 Data = 0x0;
880af9db
AC		 1025 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1026 &Data);
3f542974 1027 Data = Data & ~0x20;
880af9db
AC		 1028 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1029 Data);
3f542974 1030
880af9db 1031 /* rx_negate */
3f542974 1032 Data = 0x0;
880af9db
AC		 1033 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1034 &Data);
3f542974 1035 Data = Data | 0x10;
880af9db
AC		 1036 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1037 Data);
3f542974 1038
880af9db
AC		 1039 /* Check to see if we've set up our endpoint info yet *
1040 * (can't set it up in mos7840_startup as the structures *
1041 * were not set up at that time.) */
0de9a702 1042 if (port0->open_ports == 1) {
3f542974 1043 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1044 /* set up interrupt urb */
3f542974 1045 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1046 serial->dev,
1047 usb_rcvintpipe(serial->dev,
1048 serial->port[0]->interrupt_in_endpointAddress),
1049 serial->port[0]->interrupt_in_buffer,
1050 serial->port[0]->interrupt_in_urb->
1051 transfer_buffer_length,
1052 mos7840_interrupt_callback,
1053 serial,
1054 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1055
1056 /* start interrupt read for mos7840 *
1057 * will continue as long as mos7840 is connected */
1058
1059 response =
1060 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1061 GFP_KERNEL);
1062 if (response) {
194343d9
GKH		 1063 dev_err(&port->dev, "%s - Error %d submitting "
1064 "interrupt urb\n", __func__, response);
3f542974
PS		 1065 }
1066
1067 }
1068
1069 }
1070
1071 /* see if we've set up our endpoint info yet *
1072 * (can't set it up in mos7840_startup as the *
1073 * structures were not set up at that time.) */
1074
9c134a14
GKH		 1075 dev_dbg(&port->dev, "port number is %d\n", port->number);
1076 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor);
1077 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1078 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1079 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1080 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
3f542974
PS		 1081 mos7840_port->read_urb = port->read_urb;
1082
1083 /* set up our bulk in urb */
093ea2d3
DL		 1084 if ((serial->num_ports == 2)
1085 && ((((__u16)port->number -
1086 (__u16)(port->serial->minor)) % 2) != 0)) {
1087 usb_fill_bulk_urb(mos7840_port->read_urb,
1088 serial->dev,
1089 usb_rcvbulkpipe(serial->dev,
1090 (port->bulk_in_endpointAddress) + 2),
1091 port->bulk_in_buffer,
1092 mos7840_port->read_urb->transfer_buffer_length,
1093 mos7840_bulk_in_callback, mos7840_port);
1094 } else {
1095 usb_fill_bulk_urb(mos7840_port->read_urb,
1096 serial->dev,
1097 usb_rcvbulkpipe(serial->dev,
1098 port->bulk_in_endpointAddress),
1099 port->bulk_in_buffer,
1100 mos7840_port->read_urb->transfer_buffer_length,
1101 mos7840_bulk_in_callback, mos7840_port);
1102 }
3f542974 1103
9c134a14 1104 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
50de36f7 1105 mos7840_port->read_urb_busy = true;
3f542974
PS		 1106 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1107 if (response) {
194343d9
GKH		 1108 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1109 __func__, response);
50de36f7 1110 mos7840_port->read_urb_busy = false;
3f542974
PS		 1111 }
1112
1113 /* initialize our wait queues */
1114 init_waitqueue_head(&mos7840_port->wait_chase);
3f542974
PS		 1115
1116 /* initialize our icount structure */
1117 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1118
1119 /* initialize our port settings */
880af9db
AC		 1120 /* Must set to enable ints! */
1121 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1122 /* send a open port command */
1123 mos7840_port->open = 1;
880af9db 1124 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974
PS		 1125 mos7840_port->icount.tx = 0;
1126 mos7840_port->icount.rx = 0;
1127
3f542974 1128 return 0;
3f542974
PS		 1129}
1130
1131/*****************************************************************************
1132 * mos7840_chars_in_buffer
1133 * this function is called by the tty driver when it wants to know how many
1134 * bytes of data we currently have outstanding in the port (data that has
1135 * been written, but hasn't made it out the port yet)
1136 * If successful, we return the number of bytes left to be written in the
1137 * system,
95da310e 1138 * Otherwise we return zero.
3f542974
PS		 1139 *****************************************************************************/
1140
95da310e 1141static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1142{
95da310e 1143 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1144 int i;
1145 int chars = 0;
0de9a702 1146 unsigned long flags;
3f542974
PS		 1147 struct moschip_port *mos7840_port;
1148
9c134a14 1149 if (mos7840_port_paranoia_check(port, __func__))
95da310e 1150 return 0;
3f542974
PS		 1151
1152 mos7840_port = mos7840_get_port_private(port);
3363155b 1153 if (mos7840_port == NULL)
95da310e 1154 return 0;
3f542974 1155
880af9db 1156 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
5c263b92
MF		 1157 for (i = 0; i < NUM_URBS; ++i) {
1158 if (mos7840_port->busy[i]) {
1159 struct urb *urb = mos7840_port->write_urb_pool[i];
1160 chars += urb->transfer_buffer_length;
1161 }
1162 }
880af9db 1163 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
9c134a14 1164 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
0de9a702 1165 return chars;
3f542974
PS		 1166
1167}
1168
3f542974
PS		 1169/*****************************************************************************
1170 * mos7840_close
1171 * this function is called by the tty driver when a port is closed
1172 *****************************************************************************/
1173
335f8514 1174static void mos7840_close(struct usb_serial_port *port)
3f542974
PS		 1175{
1176 struct usb_serial *serial;
1177 struct moschip_port *mos7840_port;
0de9a702 1178 struct moschip_port *port0;
3f542974
PS		 1179 int j;
1180 __u16 Data;
1181
9c134a14 1182 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1183 return;
3f542974 1184
441b62c1 1185 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1186 if (!serial)
3f542974 1187 return;
3f542974
PS		 1188
1189 mos7840_port = mos7840_get_port_private(port);
0de9a702 1190 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1191
0de9a702 1192 if (mos7840_port == NULL || port0 == NULL)
3f542974 1193 return;
3f542974
PS		 1194
1195 for (j = 0; j < NUM_URBS; ++j)
1196 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1197
1198 /* Freeing Write URBs */
1199 for (j = 0; j < NUM_URBS; ++j) {
1200 if (mos7840_port->write_urb_pool[j]) {
1201 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1202 kfree(mos7840_port->write_urb_pool[j]->
1203 transfer_buffer);
1204
1205 usb_free_urb(mos7840_port->write_urb_pool[j]);
1206 }
1207 }
1208
bb3529c6
JH		 1209 usb_kill_urb(mos7840_port->write_urb);
1210 usb_kill_urb(mos7840_port->read_urb);
1211 mos7840_port->read_urb_busy = false;
1212
0de9a702 1213 port0->open_ports--;
9c134a14 1214 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number);
0de9a702 1215 if (port0->open_ports == 0) {
3f542974 1216 if (serial->port[0]->interrupt_in_urb) {
9c134a14 1217 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
0de9a702 1218 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1219 }
1220 }
1221
1222 if (mos7840_port->write_urb) {
1223 /* if this urb had a transfer buffer already (old tx) free it */
ae8d4879 1224 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1225 usb_free_urb(mos7840_port->write_urb);
1226 }
1227
1228 Data = 0x0;
1229 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1230
1231 Data = 0x00;
1232 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1233
1234 mos7840_port->open = 0;
3f542974
PS		 1235}
1236
1237/************************************************************************
1238 *
1239 * mos7840_block_until_chase_response
1240 *
1241 * This function will block the close until one of the following:
1242 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1243 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1244 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1245 *
1246 ************************************************************************/
1247
95da310e
AC		 1248static void mos7840_block_until_chase_response(struct tty_struct *tty,
1249 struct moschip_port *mos7840_port)
3f542974 1250{
1e658489 1251 int timeout = msecs_to_jiffies(1000);
3f542974
PS		 1252 int wait = 10;
1253 int count;
1254
1255 while (1) {
95da310e 1256 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1257
1258 /* Check for Buffer status */
880af9db 1259 if (count <= 0)
3f542974 1260 return;
3f542974
PS		 1261
1262 /* Block the thread for a while */
1263 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1264 timeout);
1265 /* No activity.. count down section */
1266 wait--;
1267 if (wait == 0) {
9c134a14 1268 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__);
3f542974
PS		 1269 return;
1270 } else {
dc0d5c1e 1271 /* Reset timeout value back to seconds */
3f542974
PS		 1272 wait = 10;
1273 }
1274 }
1275
1276}
1277
1278/*****************************************************************************
1279 * mos7840_break
1280 * this function sends a break to the port
1281 *****************************************************************************/
95da310e 1282static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1283{
95da310e 1284 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1285 unsigned char data;
1286 struct usb_serial *serial;
1287 struct moschip_port *mos7840_port;
1288
9c134a14 1289 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1290 return;
3f542974 1291
441b62c1 1292 serial = mos7840_get_usb_serial(port, __func__);
9c134a14 1293 if (!serial)
3f542974 1294 return;
3f542974
PS		 1295
1296 mos7840_port = mos7840_get_port_private(port);
1297
880af9db 1298 if (mos7840_port == NULL)
3f542974 1299 return;
3f542974 1300
bb3529c6
JH		 1301 /* flush and block until tx is empty */
1302 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1303
95da310e 1304 if (break_state == -1)
3f542974 1305 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1306 else
3f542974 1307 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974 1308
6b447f04 1309 /* FIXME: no locking on shadowLCR anywhere in driver */
3f542974 1310 mos7840_port->shadowLCR = data;
9c134a14 1311 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1312 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1313 mos7840_port->shadowLCR);
3f542974
PS		 1314}
1315
1316/*****************************************************************************
1317 * mos7840_write_room
1318 * this function is called by the tty driver when it wants to know how many
1319 * bytes of data we can accept for a specific port.
1320 * If successful, we return the amount of room that we have for this port
1321 * Otherwise we return a negative error number.
1322 *****************************************************************************/
1323
95da310e 1324static int mos7840_write_room(struct tty_struct *tty)
3f542974 1325{
95da310e 1326 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1327 int i;
1328 int room = 0;
0de9a702 1329 unsigned long flags;
3f542974
PS		 1330 struct moschip_port *mos7840_port;
1331
9c134a14 1332 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1333 return -1;
3f542974
PS		 1334
1335 mos7840_port = mos7840_get_port_private(port);
9c134a14 1336 if (mos7840_port == NULL)
3f542974 1337 return -1;
3f542974 1338
0de9a702 1339 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1340 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1341 if (!mos7840_port->busy[i])
3f542974 1342 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1343 }
0de9a702 1344 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1345
0de9a702 1346 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
9c134a14 1347 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
0de9a702 1348 return room;
3f542974
PS		 1349
1350}
1351
1352/*****************************************************************************
1353 * mos7840_write
1354 * this function is called by the tty driver when data should be written to
1355 * the port.
1356 * If successful, we return the number of bytes written, otherwise we
1357 * return a negative error number.
1358 *****************************************************************************/
1359
95da310e 1360static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1361 const unsigned char *data, int count)
1362{
1363 int status;
1364 int i;
1365 int bytes_sent = 0;
1366 int transfer_size;
0de9a702 1367 unsigned long flags;
3f542974
PS		 1368
1369 struct moschip_port *mos7840_port;
1370 struct usb_serial *serial;
1371 struct urb *urb;
880af9db 1372 /* __u16 Data; */
3f542974
PS		 1373 const unsigned char *current_position = data;
1374 unsigned char *data1;
3f542974
PS		 1375
1376#ifdef NOTMOS7840
1377 Data = 0x00;
3f542974
PS		 1378 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1379 mos7840_port->shadowLCR = Data;
9c134a14
GKH		 1380 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1381 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974 1382
880af9db
AC		 1383 /* Data = 0x03; */
1384 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1385 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1386
880af9db 1387 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1388 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1389
880af9db
AC		 1390 /* Data = 0x0c; */
1391 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1392 Data = 0x00;
3f542974 1393 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
9c134a14 1394 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
3f542974
PS		 1395
1396 Data = 0x0;
3f542974 1397 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
9c134a14 1398 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
3f542974
PS		 1399
1400 Data = Data & ~SERIAL_LCR_DLAB;
9c134a14 1401 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
3f542974
PS		 1402 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1403#endif
1404
9c134a14 1405 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1406 return -1;
3f542974
PS		 1407
1408 serial = port->serial;
9c134a14 1409 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 1410 return -1;
3f542974
PS		 1411
1412 mos7840_port = mos7840_get_port_private(port);
9c134a14 1413 if (mos7840_port == NULL)
3f542974 1414 return -1;
3f542974
PS		 1415
1416 /* try to find a free urb in the list */
1417 urb = NULL;
1418
0de9a702 1419 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1420 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1421 if (!mos7840_port->busy[i]) {
1422 mos7840_port->busy[i] = 1;
3f542974 1423 urb = mos7840_port->write_urb_pool[i];
9c134a14 1424 dev_dbg(&port->dev, "URB:%d\n", i);
3f542974
PS		 1425 break;
1426 }
1427 }
0de9a702 1428 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1429
1430 if (urb == NULL) {
9c134a14 1431 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
3f542974
PS		 1432 goto exit;
1433 }
1434
1435 if (urb->transfer_buffer == NULL) {
1436 urb->transfer_buffer =
1437 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1438
1439 if (urb->transfer_buffer == NULL) {
22a416c4 1440 dev_err_console(port, "%s no more kernel memory...\n",
194343d9 1441 __func__);
3f542974
PS		 1442 goto exit;
1443 }
1444 }
1445 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1446
97c4965d 1447 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1448
1449 /* fill urb with data and submit */
093ea2d3
DL		 1450 if ((serial->num_ports == 2)
1451 && ((((__u16)port->number -
1452 (__u16)(port->serial->minor)) % 2) != 0)) {
1453 usb_fill_bulk_urb(urb,
1454 serial->dev,
1455 usb_sndbulkpipe(serial->dev,
1456 (port->bulk_out_endpointAddress) + 2),
1457 urb->transfer_buffer,
1458 transfer_size,
1459 mos7840_bulk_out_data_callback, mos7840_port);
1460 } else {
1461 usb_fill_bulk_urb(urb,
1462 serial->dev,
1463 usb_sndbulkpipe(serial->dev,
1464 port->bulk_out_endpointAddress),
1465 urb->transfer_buffer,
1466 transfer_size,
1467 mos7840_bulk_out_data_callback, mos7840_port);
1468 }
3f542974
PS		 1469
1470 data1 = urb->transfer_buffer;
9c134a14 1471 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
3f542974 1472
0eafe4de
D		 1473 /* Turn on LED */
1474 if (mos7840_port->has_led && !mos7840_port->led_flag) {
1475 mos7840_port->led_flag = true;
1476 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);
1477 mod_timer(&mos7840_port->led_timer1,
1478 jiffies + msecs_to_jiffies(LED_ON_MS));
1479 }
1480
3f542974
PS		 1481 /* send it down the pipe */
1482 status = usb_submit_urb(urb, GFP_ATOMIC);
1483
1484 if (status) {
0de9a702 1485 mos7840_port->busy[i] = 0;
22a416c4 1486 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
194343d9 1487 "with status = %d\n", __func__, status);
3f542974
PS		 1488 bytes_sent = status;
1489 goto exit;
1490 }
1491 bytes_sent = transfer_size;
1492 mos7840_port->icount.tx += transfer_size;
9c134a14 1493 dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
95da310e 1494exit:
3f542974
PS		 1495 return bytes_sent;
1496
1497}
1498
1499/*****************************************************************************
1500 * mos7840_throttle
1501 * this function is called by the tty driver when it wants to stop the data
1502 * being read from the port.
1503 *****************************************************************************/
1504
95da310e 1505static void mos7840_throttle(struct tty_struct *tty)
3f542974 1506{
95da310e 1507 struct usb_serial_port *port = tty->driver_data;
3f542974 1508 struct moschip_port *mos7840_port;
3f542974
PS		 1509 int status;
1510
9c134a14 1511 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1512 return;
3f542974
PS		 1513
1514 mos7840_port = mos7840_get_port_private(port);
1515
1516 if (mos7840_port == NULL)
1517 return;
1518
1519 if (!mos7840_port->open) {
9c134a14 1520 dev_dbg(&port->dev, "%s", "port not opened\n");
3f542974
PS		 1521 return;
1522 }
1523
3f542974
PS		 1524 /* if we are implementing XON/XOFF, send the stop character */
1525 if (I_IXOFF(tty)) {
1526 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1527 status = mos7840_write(tty, port, &stop_char, 1);
1528 if (status <= 0)
3f542974 1529 return;
3f542974 1530 }
3f542974 1531 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1532 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1533 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1534 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1535 mos7840_port->shadowMCR);
95da310e 1536 if (status < 0)
3f542974 1537 return;
3f542974 1538 }
3f542974
PS		 1539}
1540
1541/*****************************************************************************
1542 * mos7840_unthrottle
880af9db
AC		 1543 * this function is called by the tty driver when it wants to resume
1544 * the data being read from the port (called after mos7840_throttle is
1545 * called)
3f542974 1546 *****************************************************************************/
95da310e 1547static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1548{
95da310e 1549 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1550 int status;
1551 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1552
9c134a14 1553 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1554 return;
3f542974
PS		 1555
1556 if (mos7840_port == NULL)
1557 return;
1558
1559 if (!mos7840_port->open) {
9c134a14 1560 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1561 return;
1562 }
1563
3f542974
PS		 1564 /* if we are implementing XON/XOFF, send the start character */
1565 if (I_IXOFF(tty)) {
1566 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1567 status = mos7840_write(tty, port, &start_char, 1);
1568 if (status <= 0)
3f542974 1569 return;
3f542974
PS		 1570 }
1571
1572 /* if we are implementing RTS/CTS, toggle that line */
adc8d746 1573 if (tty->termios.c_cflag & CRTSCTS) {
3f542974 1574 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1575 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1576 mos7840_port->shadowMCR);
95da310e 1577 if (status < 0)
3f542974 1578 return;
3f542974 1579 }
3f542974
PS		 1580}
1581
60b33c13 1582static int mos7840_tiocmget(struct tty_struct *tty)
3f542974 1583{
95da310e 1584 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1585 struct moschip_port *mos7840_port;
1586 unsigned int result;
1587 __u16 msr;
1588 __u16 mcr;
880af9db 1589 int status;
3f542974
PS		 1590 mos7840_port = mos7840_get_port_private(port);
1591
3f542974
PS		 1592 if (mos7840_port == NULL)
1593 return -ENODEV;
1594
1595 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1596 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1597 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1598 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1599 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1600 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1601 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1602 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1603 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1604
9c134a14 1605 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
3f542974
PS		 1606
1607 return result;
1608}
1609
20b9d177 1610static int mos7840_tiocmset(struct tty_struct *tty,
3f542974
PS		 1611 unsigned int set, unsigned int clear)
1612{
95da310e 1613 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1614 struct moschip_port *mos7840_port;
1615 unsigned int mcr;
87521c46 1616 int status;
3f542974 1617
3f542974
PS		 1618 mos7840_port = mos7840_get_port_private(port);
1619
1620 if (mos7840_port == NULL)
1621 return -ENODEV;
1622
e2984494 1623 /* FIXME: What locks the port registers ? */
3f542974
PS		 1624 mcr = mos7840_port->shadowMCR;
1625 if (clear & TIOCM_RTS)
1626 mcr &= ~MCR_RTS;
1627 if (clear & TIOCM_DTR)
1628 mcr &= ~MCR_DTR;
1629 if (clear & TIOCM_LOOP)
1630 mcr &= ~MCR_LOOPBACK;
1631
1632 if (set & TIOCM_RTS)
1633 mcr |= MCR_RTS;
1634 if (set & TIOCM_DTR)
1635 mcr |= MCR_DTR;
1636 if (set & TIOCM_LOOP)
1637 mcr |= MCR_LOOPBACK;
1638
1639 mos7840_port->shadowMCR = mcr;
1640
3f542974
PS		 1641 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1642 if (status < 0) {
9c134a14 1643 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
87521c46 1644 return status;
3f542974
PS		 1645 }
1646
1647 return 0;
1648}
1649
1650/*****************************************************************************
1651 * mos7840_calc_baud_rate_divisor
1652 * this function calculates the proper baud rate divisor for the specified
1653 * baud rate.
1654 *****************************************************************************/
9c134a14
GKH		 1655static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1656 int baudRate, int *divisor,
880af9db 1657 __u16 *clk_sel_val)
3f542974 1658{
9c134a14 1659 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
3f542974
PS		 1660
1661 if (baudRate <= 115200) {
1662 *divisor = 115200 / baudRate;
1663 *clk_sel_val = 0x0;
1664 }
1665 if ((baudRate > 115200) && (baudRate <= 230400)) {
1666 *divisor = 230400 / baudRate;
1667 *clk_sel_val = 0x10;
1668 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1669 *divisor = 403200 / baudRate;
1670 *clk_sel_val = 0x20;
1671 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1672 *divisor = 460800 / baudRate;
1673 *clk_sel_val = 0x30;
1674 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1675 *divisor = 806400 / baudRate;
1676 *clk_sel_val = 0x40;
1677 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1678 *divisor = 921600 / baudRate;
1679 *clk_sel_val = 0x50;
1680 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1681 *divisor = 1572864 / baudRate;
1682 *clk_sel_val = 0x60;
1683 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1684 *divisor = 3145728 / baudRate;
1685 *clk_sel_val = 0x70;
1686 }
1687 return 0;
1688
1689#ifdef NOTMCS7840
1690
1691 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1692 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1693 *divisor = mos7840_divisor_table[i].Divisor;
1694 return 0;
1695 }
1696 }
1697
1698 /* After trying for all the standard baud rates *
1699 * Try calculating the divisor for this baud rate */
1700
1701 if (baudrate > 75 && baudrate < 230400) {
1702 /* get the divisor */
1703 custom = (__u16) (230400L / baudrate);
1704
1705 /* Check for round off */
1706 round1 = (__u16) (2304000L / baudrate);
1707 round = (__u16) (round1 - (custom * 10));
880af9db 1708 if (round > 4)
3f542974 1709 custom++;
3f542974
PS		 1710 *divisor = custom;
1711
9c134a14 1712 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
3f542974
PS		 1713 return 0;
1714 }
1715
9c134a14 1716 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
3f542974
PS		 1717 return -1;
1718#endif
1719}
1720
1721/*****************************************************************************
1722 * mos7840_send_cmd_write_baud_rate
1723 * this function sends the proper command to change the baud rate of the
1724 * specified port.
1725 *****************************************************************************/
1726
1727static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1728 int baudRate)
1729{
1730 int divisor = 0;
1731 int status;
1732 __u16 Data;
1733 unsigned char number;
1734 __u16 clk_sel_val;
1735 struct usb_serial_port *port;
1736
1737 if (mos7840_port == NULL)
1738 return -1;
1739
9c134a14
GKH		 1740 port = mos7840_port->port;
1741 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1742 return -1;
3f542974 1743
9c134a14 1744 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1745 return -1;
3f542974 1746
3f542974
PS		 1747 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1748
9c134a14
GKH		 1749 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__,
1750 mos7840_port->port->number, baudRate);
880af9db 1751 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1752 if (baudRate > 115200) {
1753#ifdef HW_flow_control
880af9db
AC		 1754 /* NOTE: need to see the pther register to modify */
1755 /* setting h/w flow control bit to 1 */
3f542974
PS		 1756 Data = 0x2b;
1757 mos7840_port->shadowMCR = Data;
880af9db
AC		 1758 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1759 Data);
3f542974 1760 if (status < 0) {
9c134a14 1761 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1762 return -1;
1763 }
1764#endif
1765
1766 } else {
1767#ifdef HW_flow_control
093ea2d3 1768 /* setting h/w flow control bit to 0 */
3f542974
PS		 1769 Data = 0xb;
1770 mos7840_port->shadowMCR = Data;
880af9db
AC		 1771 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1772 Data);
3f542974 1773 if (status < 0) {
9c134a14 1774 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1775 return -1;
1776 }
1777#endif
1778
1779 }
1780
880af9db 1781 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1782 clk_sel_val = 0x0;
1783 Data = 0x0;
9c134a14 1784 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
3f542974 1785 &clk_sel_val);
880af9db
AC		 1786 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1787 &Data);
3f542974 1788 if (status < 0) {
9c134a14 1789 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
3f542974
PS		 1790 return -1;
1791 }
1792 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1793 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1794 Data);
3f542974 1795 if (status < 0) {
9c134a14 1796 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
3f542974
PS		 1797 return -1;
1798 }
1799 /* Calculate the Divisor */
1800
1801 if (status) {
194343d9 1802 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1803 return status;
1804 }
1805 /* Enable access to divisor latch */
1806 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1807 mos7840_port->shadowLCR = Data;
1808 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1809
1810 /* Write the divisor */
1811 Data = (unsigned char)(divisor & 0xff);
9c134a14 1812 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
3f542974
PS		 1813 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1814
1815 Data = (unsigned char)((divisor & 0xff00) >> 8);
9c134a14 1816 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
3f542974
PS		 1817 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1818
1819 /* Disable access to divisor latch */
1820 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1821 mos7840_port->shadowLCR = Data;
1822 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1823
1824 }
3f542974
PS		 1825 return status;
1826}
1827
1828/*****************************************************************************
1829 * mos7840_change_port_settings
1830 * This routine is called to set the UART on the device to match
1831 * the specified new settings.
1832 *****************************************************************************/
1833
95da310e
AC		 1834static void mos7840_change_port_settings(struct tty_struct *tty,
1835 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1836{
3f542974
PS		 1837 int baud;
1838 unsigned cflag;
1839 unsigned iflag;
1840 __u8 lData;
1841 __u8 lParity;
1842 __u8 lStop;
1843 int status;
1844 __u16 Data;
1845 struct usb_serial_port *port;
1846 struct usb_serial *serial;
1847
1848 if (mos7840_port == NULL)
1849 return;
1850
9c134a14 1851 port = mos7840_port->port;
3f542974 1852
9c134a14 1853 if (mos7840_port_paranoia_check(port, __func__))
3f542974 1854 return;
3f542974 1855
9c134a14 1856 if (mos7840_serial_paranoia_check(port->serial, __func__))
3f542974 1857 return;
3f542974
PS		 1858
1859 serial = port->serial;
1860
3f542974 1861 if (!mos7840_port->open) {
9c134a14 1862 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 1863 return;
1864 }
1865
3f542974
PS		 1866 lData = LCR_BITS_8;
1867 lStop = LCR_STOP_1;
1868 lParity = LCR_PAR_NONE;
1869
adc8d746
AC		 1870 cflag = tty->termios.c_cflag;
1871 iflag = tty->termios.c_iflag;
3f542974
PS		 1872
1873 /* Change the number of bits */
1874 if (cflag & CSIZE) {
1875 switch (cflag & CSIZE) {
1876 case CS5:
1877 lData = LCR_BITS_5;
1878 break;
1879
1880 case CS6:
1881 lData = LCR_BITS_6;
1882 break;
1883
1884 case CS7:
1885 lData = LCR_BITS_7;
1886 break;
1887 default:
1888 case CS8:
1889 lData = LCR_BITS_8;
1890 break;
1891 }
1892 }
1893 /* Change the Parity bit */
1894 if (cflag & PARENB) {
1895 if (cflag & PARODD) {
1896 lParity = LCR_PAR_ODD;
9c134a14 1897 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
3f542974
PS		 1898 } else {
1899 lParity = LCR_PAR_EVEN;
9c134a14 1900 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
3f542974
PS		 1901 }
1902
1903 } else {
9c134a14 1904 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
3f542974
PS		 1905 }
1906
880af9db 1907 if (cflag & CMSPAR)
3f542974 1908 lParity = lParity | 0x20;
3f542974
PS		 1909
1910 /* Change the Stop bit */
1911 if (cflag & CSTOPB) {
1912 lStop = LCR_STOP_2;
9c134a14 1913 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
3f542974
PS		 1914 } else {
1915 lStop = LCR_STOP_1;
9c134a14 1916 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
3f542974
PS		 1917 }
1918
1919 /* Update the LCR with the correct value */
1920 mos7840_port->shadowLCR &=
1921 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1922 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1923
9c134a14
GKH		 1924 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1925 mos7840_port->shadowLCR);
3f542974
PS		 1926 /* Disable Interrupts */
1927 Data = 0x00;
1928 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1929
1930 Data = 0x00;
1931 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1932
1933 Data = 0xcf;
1934 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1935
1936 /* Send the updated LCR value to the mos7840 */
1937 Data = mos7840_port->shadowLCR;
1938
1939 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1940
1941 Data = 0x00b;
1942 mos7840_port->shadowMCR = Data;
1943 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1944 Data = 0x00b;
1945 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1946
1947 /* set up the MCR register and send it to the mos7840 */
1948
1949 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 1950 if (cflag & CBAUD)
3f542974 1951 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 1952
880af9db 1953 if (cflag & CRTSCTS)
3f542974 1954 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 1955 else
3f542974 1956 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 1957
1958 Data = mos7840_port->shadowMCR;
1959 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1960
1961 /* Determine divisor based on baud rate */
1962 baud = tty_get_baud_rate(tty);
1963
1964 if (!baud) {
1965 /* pick a default, any default... */
9c134a14 1966 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
3f542974
PS		 1967 baud = 9600;
1968 }
1969
9c134a14 1970 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
3f542974
PS		 1971 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1972
1973 /* Enable Interrupts */
1974 Data = 0x0c;
1975 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1976
50de36f7 1977 if (mos7840_port->read_urb_busy == false) {
50de36f7 1978 mos7840_port->read_urb_busy = true;
3f542974 1979 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
3f542974 1980 if (status) {
9c134a14 1981 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 1982 status);
50de36f7 1983 mos7840_port->read_urb_busy = false;
3f542974
PS		 1984 }
1985 }
9c134a14
GKH		 1986 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1987 mos7840_port->shadowLCR);
3f542974
PS		 1988}
1989
1990/*****************************************************************************
1991 * mos7840_set_termios
1992 * this function is called by the tty driver when it wants to change
1993 * the termios structure
1994 *****************************************************************************/
1995
95da310e
AC		 1996static void mos7840_set_termios(struct tty_struct *tty,
1997 struct usb_serial_port *port,
606d099c 1998 struct ktermios *old_termios)
3f542974
PS		 1999{
2000 int status;
2001 unsigned int cflag;
2002 struct usb_serial *serial;
2003 struct moschip_port *mos7840_port;
3363155b 2004
9c134a14 2005 if (mos7840_port_paranoia_check(port, __func__))
3f542974 2006 return;
3f542974
PS		 2007
2008 serial = port->serial;
2009
9c134a14 2010 if (mos7840_serial_paranoia_check(serial, __func__))
3f542974 2011 return;
3f542974
PS		 2012
2013 mos7840_port = mos7840_get_port_private(port);
2014
2015 if (mos7840_port == NULL)
2016 return;
2017
3f542974 2018 if (!mos7840_port->open) {
9c134a14 2019 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
3f542974
PS		 2020 return;
2021 }
2022
9c134a14 2023 dev_dbg(&port->dev, "%s", "setting termios - \n");
3f542974 2024
adc8d746 2025 cflag = tty->termios.c_cflag;
3f542974 2026
9c134a14 2027 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
d9a80746 2028 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
9c134a14
GKH		 2029 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2030 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2031 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
3f542974
PS		 2032
2033 /* change the port settings to the new ones specified */
2034
95da310e 2035 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2036
2037 if (!mos7840_port->read_urb) {
9c134a14 2038 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
3f542974
PS		 2039 return;
2040 }
2041
50de36f7 2042 if (mos7840_port->read_urb_busy == false) {
50de36f7 2043 mos7840_port->read_urb_busy = true;
3f542974
PS		 2044 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2045 if (status) {
9c134a14 2046 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
3f542974 2047 status);
50de36f7 2048 mos7840_port->read_urb_busy = false;
3f542974
PS		 2049 }
2050 }
3f542974
PS		 2051}
2052
2053/*****************************************************************************
2054 * mos7840_get_lsr_info - get line status register info
2055 *
2056 * Purpose: Let user call ioctl() to get info when the UART physically
2057 * is emptied. On bus types like RS485, the transmitter must
2058 * release the bus after transmitting. This must be done when
2059 * the transmit shift register is empty, not be done when the
2060 * transmit holding register is empty. This functionality
2061 * allows an RS485 driver to be written in user space.
2062 *****************************************************************************/
2063
95da310e 2064static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2065 unsigned int __user *value)
3f542974
PS		 2066{
2067 int count;
2068 unsigned int result = 0;
2069
95da310e 2070 count = mos7840_chars_in_buffer(tty);
9c134a14 2071 if (count == 0)
3f542974 2072 result = TIOCSER_TEMT;
3f542974
PS		 2073
2074 if (copy_to_user(value, &result, sizeof(int)))
2075 return -EFAULT;
2076 return 0;
2077}
2078
3f542974
PS		 2079/*****************************************************************************
2080 * mos7840_get_serial_info
2081 * function to get information about serial port
2082 *****************************************************************************/
2083
2084static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2085 struct serial_struct __user *retinfo)
3f542974
PS		 2086{
2087 struct serial_struct tmp;
2088
2089 if (mos7840_port == NULL)
2090 return -1;
2091
2092 if (!retinfo)
2093 return -EFAULT;
2094
2095 memset(&tmp, 0, sizeof(tmp));
2096
2097 tmp.type = PORT_16550A;
2098 tmp.line = mos7840_port->port->serial->minor;
2099 tmp.port = mos7840_port->port->number;
2100 tmp.irq = 0;
2101 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2102 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2103 tmp.baud_base = 9600;
2104 tmp.close_delay = 5 * HZ;
2105 tmp.closing_wait = 30 * HZ;
2106
2107 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2108 return -EFAULT;
2109 return 0;
2110}
2111
0bca1b91
AC		 2112static int mos7840_get_icount(struct tty_struct *tty,
2113 struct serial_icounter_struct *icount)
2114{
2115 struct usb_serial_port *port = tty->driver_data;
2116 struct moschip_port *mos7840_port;
2117 struct async_icount cnow;
c9fac853 2118 unsigned long flags;
0bca1b91
AC		 2119
2120 mos7840_port = mos7840_get_port_private(port);
c9fac853
JH		 2121
2122 spin_lock_irqsave(&port->lock, flags);
0bca1b91 2123 cnow = mos7840_port->icount;
c9fac853 2124 spin_unlock_irqrestore(&port->lock, flags);
0bca1b91 2125
0bca1b91
AC		 2126 icount->cts = cnow.cts;
2127 icount->dsr = cnow.dsr;
2128 icount->rng = cnow.rng;
2129 icount->dcd = cnow.dcd;
2130 icount->rx = cnow.rx;
2131 icount->tx = cnow.tx;
2132 icount->frame = cnow.frame;
2133 icount->overrun = cnow.overrun;
2134 icount->parity = cnow.parity;
2135 icount->brk = cnow.brk;
2136 icount->buf_overrun = cnow.buf_overrun;
2137
9c134a14
GKH		 2138 dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__,
2139 icount->rx, icount->tx);
0bca1b91
AC		 2140 return 0;
2141}
2142
3f542974
PS		 2143/*****************************************************************************
2144 * SerialIoctl
2145 * this function handles any ioctl calls to the driver
2146 *****************************************************************************/
2147
00a0d0d6 2148static int mos7840_ioctl(struct tty_struct *tty,
3f542974
PS		 2149 unsigned int cmd, unsigned long arg)
2150{
95da310e 2151 struct usb_serial_port *port = tty->driver_data;
97c4965d 2152 void __user *argp = (void __user *)arg;
3f542974 2153 struct moschip_port *mos7840_port;
c9fac853 2154 unsigned long flags;
3f542974
PS		 2155 struct async_icount cnow;
2156 struct async_icount cprev;
3f542974 2157
9c134a14 2158 if (mos7840_port_paranoia_check(port, __func__))
3f542974 2159 return -1;
3f542974
PS		 2160
2161 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2162
2163 if (mos7840_port == NULL)
2164 return -1;
2165
9c134a14 2166 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
3f542974
PS		 2167
2168 switch (cmd) {
2169 /* return number of bytes available */
2170
3f542974 2171 case TIOCSERGETLSR:
9c134a14 2172 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
95da310e 2173 return mos7840_get_lsr_info(tty, argp);
3f542974 2174
3f542974 2175 case TIOCGSERIAL:
9c134a14 2176 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
97c4965d 2177 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2178
2179 case TIOCSSERIAL:
9c134a14 2180 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
3f542974
PS		 2181 break;
2182
2183 case TIOCMIWAIT:
9c134a14 2184 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__);
c9fac853 2185 spin_lock_irqsave(&port->lock, flags);
3f542974 2186 cprev = mos7840_port->icount;
c9fac853 2187 spin_unlock_irqrestore(&port->lock, flags);
3f542974 2188 while (1) {
880af9db 2189 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974 2190 mos7840_port->delta_msr_cond = 0;
a14430db
JH		 2191 wait_event_interruptible(port->delta_msr_wait,
2192 (port->serial->disconnected ||
2193 mos7840_port->
3f542974
PS		 2194 delta_msr_cond == 1));
2195
2196 /* see if a signal did it */
2197 if (signal_pending(current))
2198 return -ERESTARTSYS;
a14430db
JH		 2199
2200 if (port->serial->disconnected)
2201 return -EIO;
2202
c9fac853 2203 spin_lock_irqsave(&port->lock, flags);
3f542974 2204 cnow = mos7840_port->icount;
c9fac853
JH		 2205 spin_unlock_irqrestore(&port->lock, flags);
2206
3f542974
PS		 2207 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2208 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2209 return -EIO; /* no change => error */
c9fac853 2210
3f542974
PS		 2211 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2212 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2213 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2214 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2215 return 0;
2216 }
2217 cprev = cnow;
2218 }
2219 /* NOTREACHED */
2220 break;
2221
3f542974
PS		 2222 default:
2223 break;
2224 }
3f542974
PS		 2225 return -ENOIOCTLCMD;
2226}
2227
0eafe4de
D		 2228static int mos7810_check(struct usb_serial *serial)
2229{
2230 int i, pass_count = 0;
2231 __u16 data = 0, mcr_data = 0;
2232 __u16 test_pattern = 0x55AA;
2233
2234 /* Store MCR setting */
2235 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2236 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2237 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2238
2239 for (i = 0; i < 16; i++) {
2240 /* Send the 1-bit test pattern out to MCS7810 test pin */
2241 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2242 MCS_WRREQ, MCS_WR_RTYPE,
2243 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2244 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2245
2246 /* Read the test pattern back */
2247 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2248 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2249 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2250
2251 /* If this is a MCS7810 device, both test patterns must match */
2252 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2253 break;
2254
2255 pass_count++;
2256 }
2257
2258 /* Restore MCR setting */
2259 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2260 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2261 0, MOS_WDR_TIMEOUT);
2262
2263 if (pass_count == 16)
2264 return 1;
2265
2266 return 0;
2267}
2268
3f542974
PS		 2269static int mos7840_calc_num_ports(struct usb_serial *serial)
2270{
0eafe4de 2271 __u16 data = 0x00;
093ea2d3
DL		 2272 int mos7840_num_ports;
2273
0eafe4de
D		 2274 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2275 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
093ea2d3
DL		 2276 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2277
0eafe4de
D		 2278 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||
2279 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {
2280 device_type = serial->dev->descriptor.idProduct;
093ea2d3 2281 } else {
0eafe4de
D		 2282 /* For a MCS7840 device GPIO0 must be set to 1 */
2283 if ((data & 0x01) == 1)
2284 device_type = MOSCHIP_DEVICE_ID_7840;
2285 else if (mos7810_check(serial))
2286 device_type = MOSCHIP_DEVICE_ID_7810;
2287 else
2288 device_type = MOSCHIP_DEVICE_ID_7820;
3f542974 2289 }
093ea2d3 2290
0eafe4de
D		 2291 mos7840_num_ports = (device_type >> 4) & 0x000F;
2292 serial->num_bulk_in = mos7840_num_ports;
2293 serial->num_bulk_out = mos7840_num_ports;
2294 serial->num_ports = mos7840_num_ports;
2295
3f542974
PS		 2296 return mos7840_num_ports;
2297}
2298
80c00750 2299static int mos7840_port_probe(struct usb_serial_port *port)
3f542974 2300{
80c00750 2301 struct usb_serial *serial = port->serial;
3f542974 2302 struct moschip_port *mos7840_port;
80c00750
JH		 2303 int status;
2304 int pnum;
3f542974 2305 __u16 Data;
3f542974 2306
3f542974
PS		 2307 /* we set up the pointers to the endpoints in the mos7840_open *
2308 * function, as the structures aren't created yet. */
2309
80c00750
JH		 2310 pnum = port->number - serial->minor;
2311
ae685eff
JH		 2312 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2313 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2314 if (mos7840_port == NULL) {
2315 dev_err(&port->dev, "%s - Out of memory\n", __func__);
2316 return -ENOMEM;
2317 }
3f542974 2318
ae685eff
JH		 2319 /* Initialize all port interrupt end point to port 0 int
2320 * endpoint. Our device has only one interrupt end point
2321 * common to all port */
2322
2323 mos7840_port->port = port;
2324 mos7840_set_port_private(port, mos7840_port);
2325 spin_lock_init(&mos7840_port->pool_lock);
2326
2327 /* minor is not initialised until later by
2328 * usb-serial.c:get_free_serial() and cannot therefore be used
2329 * to index device instances */
2330 mos7840_port->port_num = pnum + 1;
2331 dev_dbg(&port->dev, "port->number = %d\n", port->number);
2332 dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor);
2333 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2334 dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor);
2335
2336 if (mos7840_port->port_num == 1) {
2337 mos7840_port->SpRegOffset = 0x0;
2338 mos7840_port->ControlRegOffset = 0x1;
2339 mos7840_port->DcrRegOffset = 0x4;
2340 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2341 mos7840_port->SpRegOffset = 0x8;
2342 mos7840_port->ControlRegOffset = 0x9;
2343 mos7840_port->DcrRegOffset = 0x16;
2344 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2345 mos7840_port->SpRegOffset = 0xa;
2346 mos7840_port->ControlRegOffset = 0xb;
2347 mos7840_port->DcrRegOffset = 0x19;
2348 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2349 mos7840_port->SpRegOffset = 0xa;
2350 mos7840_port->ControlRegOffset = 0xb;
2351 mos7840_port->DcrRegOffset = 0x19;
2352 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2353 mos7840_port->SpRegOffset = 0xc;
2354 mos7840_port->ControlRegOffset = 0xd;
2355 mos7840_port->DcrRegOffset = 0x1c;
2356 }
2357 mos7840_dump_serial_port(port, mos7840_port);
2358 mos7840_set_port_private(port, mos7840_port);
2359
2360 /* enable rx_disable bit in control register */
2361 status = mos7840_get_reg_sync(port,
2362 mos7840_port->ControlRegOffset, &Data);
2363 if (status < 0) {
2364 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2365 goto out;
2366 } else
2367 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2368 Data |= 0x08; /* setting driver done bit */
2369 Data |= 0x04; /* sp1_bit to have cts change reflect in
2370 modem status reg */
2371
2372 /* Data |= 0x20; //rx_disable bit */
2373 status = mos7840_set_reg_sync(port,
2374 mos7840_port->ControlRegOffset, Data);
2375 if (status < 0) {
2376 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2377 goto out;
2378 } else
2379 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2380
2381 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2382 and 0x24 in DCR3 */
2383 Data = 0x01;
2384 status = mos7840_set_reg_sync(port,
2385 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2386 if (status < 0) {
2387 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2388 goto out;
2389 } else
2390 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
3f542974 2391
ae685eff
JH		 2392 Data = 0x05;
2393 status = mos7840_set_reg_sync(port,
2394 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2395 if (status < 0) {
2396 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2397 goto out;
2398 } else
2399 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
3f542974 2400
ae685eff
JH		 2401 Data = 0x24;
2402 status = mos7840_set_reg_sync(port,
2403 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2404 if (status < 0) {
2405 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2406 goto out;
2407 } else
2408 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
3f542974 2409
ae685eff
JH		 2410 /* write values in clkstart0x0 and clkmulti 0x20 */
2411 Data = 0x0;
2412 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2413 if (status < 0) {
2414 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2415 goto out;
2416 } else
2417 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
3f542974 2418
ae685eff
JH		 2419 Data = 0x20;
2420 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2421 if (status < 0) {
2422 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2423 goto error;
2424 } else
2425 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
3f542974 2426
ae685eff
JH		 2427 /* write value 0x0 to scratchpad register */
2428 Data = 0x00;
2429 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2430 if (status < 0) {
2431 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2432 goto out;
2433 } else
2434 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2435
2436 /* Zero Length flag register */
2437 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2438 Data = 0xff;
80c00750 2439 status = mos7840_set_reg_sync(port,
ae685eff
JH		 2440 (__u16) (ZLP_REG1 +
2441 ((__u16)mos7840_port->port_num)), Data);
2442 dev_dbg(&port->dev, "ZLIP offset %x\n",
2443 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
3f542974 2444 if (status < 0) {
ae685eff
JH		 2445 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2446 goto out;
3f542974 2447 } else
ae685eff
JH		 2448 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2449 } else {
2450 Data = 0xff;
80c00750 2451 status = mos7840_set_reg_sync(port,
ae685eff
JH		 2452 (__u16) (ZLP_REG1 +
2453 ((__u16)mos7840_port->port_num) - 0x1), Data);
2454 dev_dbg(&port->dev, "ZLIP offset %x\n",
2455 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
3f542974 2456 if (status < 0) {
ae685eff
JH		 2457 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2458 goto out;
3f542974 2459 } else
ae685eff 2460 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
3f542974 2461
ae685eff
JH		 2462 }
2463 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2464 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2465 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2466 GFP_KERNEL);
2467 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2468 !mos7840_port->dr) {
2469 status = -ENOMEM;
2470 goto error;
2471 }
0eafe4de 2472
ae685eff 2473 mos7840_port->has_led = false;
0eafe4de 2474
ae685eff
JH		 2475 /* Initialize LED timers */
2476 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2477 mos7840_port->has_led = true;
0eafe4de 2478
ae685eff
JH		 2479 init_timer(&mos7840_port->led_timer1);
2480 mos7840_port->led_timer1.function = mos7840_led_off;
2481 mos7840_port->led_timer1.expires =
2482 jiffies + msecs_to_jiffies(LED_ON_MS);
2483 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
0eafe4de 2484
ae685eff
JH		 2485 init_timer(&mos7840_port->led_timer2);
2486 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2487 mos7840_port->led_timer2.expires =
2488 jiffies + msecs_to_jiffies(LED_OFF_MS);
2489 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
0eafe4de 2490
ae685eff 2491 mos7840_port->led_flag = false;
3f542974 2492
ae685eff
JH		 2493 /* Turn off LED */
2494 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2495 }
2496out:
80c00750
JH		 2497 if (pnum == serial->num_ports - 1) {
2498 /* Zero Length flag enable */
2499 Data = 0x0f;
2500 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2501 if (status < 0) {
2502 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2503 goto error;
2504 } else
2505 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2506
2507 /* setting configuration feature to one */
2508 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2509 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2510 MOS_WDR_TIMEOUT);
2511 }
3f542974 2512 return 0;
0de9a702 2513error:
80c00750
JH		 2514 kfree(mos7840_port->dr);
2515 kfree(mos7840_port->ctrl_buf);
2516 usb_free_urb(mos7840_port->control_urb);
2517 kfree(mos7840_port);
0de9a702 2518
0de9a702 2519 return status;
3f542974
PS		 2520}
2521
80c00750 2522static int mos7840_port_remove(struct usb_serial_port *port)
3f542974 2523{
3f542974 2524 struct moschip_port *mos7840_port;
3f542974 2525
80c00750 2526 mos7840_port = mos7840_get_port_private(port);
3f542974 2527
80c00750
JH		 2528 if (mos7840_port->has_led) {
2529 /* Turn off LED */
2530 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
3f542974 2531
80c00750
JH		 2532 del_timer_sync(&mos7840_port->led_timer1);
2533 del_timer_sync(&mos7840_port->led_timer2);
f9c99bb8 2534 }
80c00750
JH		 2535 usb_kill_urb(mos7840_port->control_urb);
2536 usb_free_urb(mos7840_port->control_urb);
2537 kfree(mos7840_port->ctrl_buf);
2538 kfree(mos7840_port->dr);
2539 kfree(mos7840_port);
f9c99bb8 2540
80c00750 2541 return 0;
3f542974
PS		 2542}
2543
2544static struct usb_serial_driver moschip7840_4port_device = {
2545 .driver = {
2546 .owner = THIS_MODULE,
2547 .name = "mos7840",
2548 },
2549 .description = DRIVER_DESC,
68e24113 2550 .id_table = id_table,
3f542974 2551 .num_ports = 4,
3f542974
PS		 2552 .open = mos7840_open,
2553 .close = mos7840_close,
2554 .write = mos7840_write,
2555 .write_room = mos7840_write_room,
2556 .chars_in_buffer = mos7840_chars_in_buffer,
2557 .throttle = mos7840_throttle,
2558 .unthrottle = mos7840_unthrottle,
2559 .calc_num_ports = mos7840_calc_num_ports,
2560#ifdef MCSSerialProbe
2561 .probe = mos7840_serial_probe,
2562#endif
2563 .ioctl = mos7840_ioctl,
2564 .set_termios = mos7840_set_termios,
2565 .break_ctl = mos7840_break,
2566 .tiocmget = mos7840_tiocmget,
2567 .tiocmset = mos7840_tiocmset,
0bca1b91 2568 .get_icount = mos7840_get_icount,
80c00750
JH		 2569 .port_probe = mos7840_port_probe,
2570 .port_remove = mos7840_port_remove,
3f542974
PS		 2571 .read_bulk_callback = mos7840_bulk_in_callback,
2572 .read_int_callback = mos7840_interrupt_callback,
2573};
2574
4d2a7aff
AS		 2575static struct usb_serial_driver * const serial_drivers[] = {
2576 &moschip7840_4port_device, NULL
2577};
2578
68e24113 2579module_usb_serial_driver(serial_drivers, id_table);
3f542974 2580
3f542974
PS		 2581MODULE_DESCRIPTION(DRIVER_DESC);
2582MODULE_LICENSE("GPL");
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