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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[net-next-2.6.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
PS		 37
38/*
39 * Version Information
40 */
37768adf 41#define DRIVER_VERSION "1.3.2"
3f542974
PS		 42#define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
43
44/*
45 * 16C50 UART register defines
46 */
47
48#define LCR_BITS_5 0x00 /* 5 bits/char */
49#define LCR_BITS_6 0x01 /* 6 bits/char */
50#define LCR_BITS_7 0x02 /* 7 bits/char */
51#define LCR_BITS_8 0x03 /* 8 bits/char */
52#define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
53
54#define LCR_STOP_1 0x00 /* 1 stop bit */
55#define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
56#define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
57#define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
58
59#define LCR_PAR_NONE 0x00 /* No parity */
60#define LCR_PAR_ODD 0x08 /* Odd parity */
61#define LCR_PAR_EVEN 0x18 /* Even parity */
62#define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
63#define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
64#define LCR_PAR_MASK 0x38 /* Mask for parity field */
65
66#define LCR_SET_BREAK 0x40 /* Set Break condition */
67#define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
68
69#define MCR_DTR 0x01 /* Assert DTR */
70#define MCR_RTS 0x02 /* Assert RTS */
71#define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
72#define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
73#define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
74#define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
75
76#define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
77#define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
78#define MOS7840_MSR_RI 0x40 /* Current state of RI */
79#define MOS7840_MSR_CD 0x80 /* Current state of CD */
80
81/*
82 * Defines used for sending commands to port
83 */
84
880af9db
AC		 85#define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
86#define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
3f542974
PS		 87
88#define MOS_PORT1 0x0200
89#define MOS_PORT2 0x0300
90#define MOS_VENREG 0x0000
91#define MOS_MAX_PORT 0x02
92#define MOS_WRITE 0x0E
93#define MOS_READ 0x0D
94
95/* Requests */
96#define MCS_RD_RTYPE 0xC0
97#define MCS_WR_RTYPE 0x40
98#define MCS_RDREQ 0x0D
99#define MCS_WRREQ 0x0E
100#define MCS_CTRL_TIMEOUT 500
101#define VENDOR_READ_LENGTH (0x01)
102
103#define MAX_NAME_LEN 64
104
880af9db
AC		 105#define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
106#define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
3f542974
PS		 107
108/* For higher baud Rates use TIOCEXBAUD */
109#define TIOCEXBAUD 0x5462
110
111/* vendor id and device id defines */
112
11e1abb4 113/* The native mos7840/7820 component */
3f542974
PS		 114#define USB_VENDOR_ID_MOSCHIP 0x9710
115#define MOSCHIP_DEVICE_ID_7840 0x7840
116#define MOSCHIP_DEVICE_ID_7820 0x7820
11e1abb4
DL		 117/* The native component can have its vendor/device id's overridden
118 * in vendor-specific implementations. Such devices can be handled
119 * by making a change here, in moschip_port_id_table, and in
120 * moschip_id_table_combined
121 */
870408c8
DL		 122#define USB_VENDOR_ID_BANDB 0x0856
123#define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
124#define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
125#define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
126#define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
127#define BANDB_DEVICE_ID_US9ML2_2 0xAC29
128#define BANDB_DEVICE_ID_US9ML2_4 0xAC30
129#define BANDB_DEVICE_ID_USPTL4_2 0xAC31
130#define BANDB_DEVICE_ID_USPTL4_4 0xAC32
131#define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
132#define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
133#define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
134#define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
135#define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
3f542974 136
9d498bea
RL		 137/* This driver also supports
138 * ATEN UC2324 device using Moschip MCS7840
139 * ATEN UC2322 device using Moschip MCS7820
140 */
e9b8cffa
TC		 141#define USB_VENDOR_ID_ATENINTL 0x0557
142#define ATENINTL_DEVICE_ID_UC2324 0x2011
9d498bea 143#define ATENINTL_DEVICE_ID_UC2322 0x7820
e9b8cffa 144
11e1abb4 145/* Interrupt Routine Defines */
3f542974
PS		 146
147#define SERIAL_IIR_RLS 0x06
148#define SERIAL_IIR_MS 0x00
149
150/*
151 * Emulation of the bit mask on the LINE STATUS REGISTER.
152 */
153#define SERIAL_LSR_DR 0x0001
154#define SERIAL_LSR_OE 0x0002
155#define SERIAL_LSR_PE 0x0004
156#define SERIAL_LSR_FE 0x0008
157#define SERIAL_LSR_BI 0x0010
158
159#define MOS_MSR_DELTA_CTS 0x10
160#define MOS_MSR_DELTA_DSR 0x20
161#define MOS_MSR_DELTA_RI 0x40
162#define MOS_MSR_DELTA_CD 0x80
163
880af9db 164/* Serial Port register Address */
3f542974
PS		 165#define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
166#define FIFO_CONTROL_REGISTER ((__u16)(0x02))
167#define LINE_CONTROL_REGISTER ((__u16)(0x03))
168#define MODEM_CONTROL_REGISTER ((__u16)(0x04))
169#define LINE_STATUS_REGISTER ((__u16)(0x05))
170#define MODEM_STATUS_REGISTER ((__u16)(0x06))
171#define SCRATCH_PAD_REGISTER ((__u16)(0x07))
172#define DIVISOR_LATCH_LSB ((__u16)(0x00))
173#define DIVISOR_LATCH_MSB ((__u16)(0x01))
174
175#define CLK_MULTI_REGISTER ((__u16)(0x02))
176#define CLK_START_VALUE_REGISTER ((__u16)(0x03))
177
178#define SERIAL_LCR_DLAB ((__u16)(0x0080))
179
180/*
181 * URB POOL related defines
182 */
183#define NUM_URBS 16 /* URB Count */
184#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
185
186
7d40d7e8 187static const struct usb_device_id moschip_port_id_table[] = {
3f542974
PS		 188 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
acf509ae 190 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
870408c8 191 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
acf509ae 192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
870408c8 193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
acf509ae
CB		 194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
11e1abb4 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
870408c8 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
acf509ae 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
870408c8 201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
27f1281d 202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
e9b8cffa 203 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
9d498bea 204 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
3f542974
PS		 205 {} /* terminating entry */
206};
207
7d40d7e8 208static const struct usb_device_id moschip_id_table_combined[] __devinitconst = {
3f542974
PS		 209 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
210 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
acf509ae 211 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
870408c8 212 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
acf509ae 213 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
870408c8 214 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
acf509ae
CB		 215 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
216 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
217 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
218 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
11e1abb4 219 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
870408c8 220 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
acf509ae 221 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
870408c8 222 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
27f1281d 223 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
e9b8cffa 224 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
9d498bea 225 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
3f542974
PS		 226 {} /* terminating entry */
227};
228
229MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
230
231/* This structure holds all of the local port information */
232
233struct moschip_port {
234 int port_num; /*Actual port number in the device(1,2,etc) */
235 struct urb *write_urb; /* write URB for this port */
236 struct urb *read_urb; /* read URB for this port */
0de9a702 237 struct urb *int_urb;
3f542974
PS		 238 __u8 shadowLCR; /* last LCR value received */
239 __u8 shadowMCR; /* last MCR value received */
240 char open;
0de9a702
ON		 241 char open_ports;
242 char zombie;
3f542974
PS		 243 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
244 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
245 int delta_msr_cond;
246 struct async_icount icount;
247 struct usb_serial_port *port; /* loop back to the owner of this object */
248
880af9db 249 /* Offsets */
3f542974
PS		 250 __u8 SpRegOffset;
251 __u8 ControlRegOffset;
252 __u8 DcrRegOffset;
880af9db 253 /* for processing control URBS in interrupt context */
3f542974 254 struct urb *control_urb;
0de9a702 255 struct usb_ctrlrequest *dr;
3f542974
PS		 256 char *ctrl_buf;
257 int MsrLsr;
258
0de9a702 259 spinlock_t pool_lock;
3f542974 260 struct urb *write_urb_pool[NUM_URBS];
0de9a702 261 char busy[NUM_URBS];
50de36f7 262 bool read_urb_busy;
3f542974
PS		 263};
264
265
266static int debug;
3f542974
PS		 267
268/*
269 * mos7840_set_reg_sync
270 * To set the Control register by calling usb_fill_control_urb function
271 * by passing usb_sndctrlpipe function as parameter.
272 */
273
274static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
275 __u16 val)
276{
277 struct usb_device *dev = port->serial->dev;
278 val = val & 0x00ff;
84fe6e79 279 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val);
3f542974
PS		 280
281 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
282 MCS_WR_RTYPE, val, reg, NULL, 0,
283 MOS_WDR_TIMEOUT);
284}
285
286/*
287 * mos7840_get_reg_sync
288 * To set the Uart register by calling usb_fill_control_urb function by
289 * passing usb_rcvctrlpipe function as parameter.
290 */
291
292static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
880af9db 293 __u16 *val)
3f542974
PS		 294{
295 struct usb_device *dev = port->serial->dev;
296 int ret = 0;
9e221a35
JH		 297 u8 *buf;
298
299 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
300 if (!buf)
301 return -ENOMEM;
3f542974
PS		 302
303 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 304 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
3f542974 305 MOS_WDR_TIMEOUT);
9e221a35 306 *val = buf[0];
84fe6e79 307 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
9e221a35
JH		 308
309 kfree(buf);
3f542974
PS		 310 return ret;
311}
312
313/*
314 * mos7840_set_uart_reg
315 * To set the Uart register by calling usb_fill_control_urb function by
316 * passing usb_sndctrlpipe function as parameter.
317 */
318
319static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
320 __u16 val)
321{
322
323 struct usb_device *dev = port->serial->dev;
324 val = val & 0x00ff;
880af9db
AC		 325 /* For the UART control registers, the application number need
326 to be Or'ed */
0de9a702 327 if (port->serial->num_ports == 4) {
880af9db
AC		 328 val |= (((__u16) port->number -
329 (__u16) (port->serial->minor)) + 1) << 8;
84fe6e79 330 dbg("mos7840_set_uart_reg application number is %x", val);
3f542974
PS		 331 } else {
332 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 333 val |= (((__u16) port->number -
3f542974 334 (__u16) (port->serial->minor)) + 1) << 8;
84fe6e79 335 dbg("mos7840_set_uart_reg application number is %x",
3f542974
PS		 336 val);
337 } else {
338 val |=
339 (((__u16) port->number -
340 (__u16) (port->serial->minor)) + 2) << 8;
84fe6e79 341 dbg("mos7840_set_uart_reg application number is %x",
3f542974
PS		 342 val);
343 }
344 }
345 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
346 MCS_WR_RTYPE, val, reg, NULL, 0,
347 MOS_WDR_TIMEOUT);
348
349}
350
351/*
352 * mos7840_get_uart_reg
353 * To set the Control register by calling usb_fill_control_urb function
354 * by passing usb_rcvctrlpipe function as parameter.
355 */
356static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
880af9db 357 __u16 *val)
3f542974
PS		 358{
359 struct usb_device *dev = port->serial->dev;
360 int ret = 0;
361 __u16 Wval;
9e221a35
JH		 362 u8 *buf;
363
364 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
365 if (!buf)
366 return -ENOMEM;
3f542974 367
84fe6e79 368 /* dbg("application number is %4x",
880af9db
AC		 369 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
370 /* Wval is same as application number */
0de9a702 371 if (port->serial->num_ports == 4) {
3f542974
PS		 372 Wval =
373 (((__u16) port->number - (__u16) (port->serial->minor)) +
374 1) << 8;
84fe6e79 375 dbg("mos7840_get_uart_reg application number is %x", Wval);
3f542974
PS		 376 } else {
377 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
880af9db 378 Wval = (((__u16) port->number -
3f542974 379 (__u16) (port->serial->minor)) + 1) << 8;
84fe6e79 380 dbg("mos7840_get_uart_reg application number is %x",
3f542974
PS		 381 Wval);
382 } else {
880af9db 383 Wval = (((__u16) port->number -
3f542974 384 (__u16) (port->serial->minor)) + 2) << 8;
84fe6e79 385 dbg("mos7840_get_uart_reg application number is %x",
3f542974
PS		 386 Wval);
387 }
388 }
389 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
9e221a35 390 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
3f542974 391 MOS_WDR_TIMEOUT);
9e221a35
JH		 392 *val = buf[0];
393
394 kfree(buf);
3f542974
PS		 395 return ret;
396}
397
398static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
399{
400
84fe6e79
TC		 401 dbg("***************************************");
402 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset);
403 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset);
404 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset);
405 dbg("***************************************");
3f542974
PS		 406
407}
408
409/************************************************************************/
410/************************************************************************/
411/* I N T E R F A C E F U N C T I O N S */
412/* I N T E R F A C E F U N C T I O N S */
413/************************************************************************/
414/************************************************************************/
415
416static inline void mos7840_set_port_private(struct usb_serial_port *port,
417 struct moschip_port *data)
418{
419 usb_set_serial_port_data(port, (void *)data);
420}
421
422static inline struct moschip_port *mos7840_get_port_private(struct
423 usb_serial_port
424 *port)
425{
426 return (struct moschip_port *)usb_get_serial_port_data(port);
427}
428
0de9a702 429static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
3f542974
PS		 430{
431 struct moschip_port *mos7840_port;
432 struct async_icount *icount;
433 mos7840_port = port;
434 icount = &mos7840_port->icount;
435 if (new_msr &
436 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
437 MOS_MSR_DELTA_CD)) {
438 icount = &mos7840_port->icount;
439
440 /* update input line counters */
441 if (new_msr & MOS_MSR_DELTA_CTS) {
442 icount->cts++;
0de9a702 443 smp_wmb();
3f542974
PS		 444 }
445 if (new_msr & MOS_MSR_DELTA_DSR) {
446 icount->dsr++;
0de9a702 447 smp_wmb();
3f542974
PS		 448 }
449 if (new_msr & MOS_MSR_DELTA_CD) {
450 icount->dcd++;
0de9a702 451 smp_wmb();
3f542974
PS		 452 }
453 if (new_msr & MOS_MSR_DELTA_RI) {
454 icount->rng++;
0de9a702 455 smp_wmb();
3f542974
PS		 456 }
457 }
3f542974
PS		 458}
459
0de9a702 460static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
3f542974
PS		 461{
462 struct async_icount *icount;
463
441b62c1 464 dbg("%s - %02x", __func__, new_lsr);
3f542974
PS		 465
466 if (new_lsr & SERIAL_LSR_BI) {
880af9db
AC		 467 /*
468 * Parity and Framing errors only count if they
469 * occur exclusive of a break being
470 * received.
471 */
3f542974
PS		 472 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
473 }
474
475 /* update input line counters */
476 icount = &port->icount;
477 if (new_lsr & SERIAL_LSR_BI) {
478 icount->brk++;
0de9a702 479 smp_wmb();
3f542974
PS		 480 }
481 if (new_lsr & SERIAL_LSR_OE) {
482 icount->overrun++;
0de9a702 483 smp_wmb();
3f542974
PS		 484 }
485 if (new_lsr & SERIAL_LSR_PE) {
486 icount->parity++;
0de9a702 487 smp_wmb();
3f542974
PS		 488 }
489 if (new_lsr & SERIAL_LSR_FE) {
490 icount->frame++;
0de9a702 491 smp_wmb();
3f542974 492 }
3f542974
PS		 493}
494
495/************************************************************************/
496/************************************************************************/
497/* U S B C A L L B A C K F U N C T I O N S */
498/* U S B C A L L B A C K F U N C T I O N S */
499/************************************************************************/
500/************************************************************************/
501
7d12e780 502static void mos7840_control_callback(struct urb *urb)
3f542974
PS		 503{
504 unsigned char *data;
505 struct moschip_port *mos7840_port;
506 __u8 regval = 0x0;
0de9a702 507 int result = 0;
0643c724 508 int status = urb->status;
3f542974 509
cdc97792 510 mos7840_port = urb->context;
0de9a702 511
0643c724 512 switch (status) {
3f542974
PS		 513 case 0:
514 /* success */
515 break;
516 case -ECONNRESET:
517 case -ENOENT:
518 case -ESHUTDOWN:
519 /* this urb is terminated, clean up */
441b62c1 520 dbg("%s - urb shutting down with status: %d", __func__,
0643c724 521 status);
3f542974
PS		 522 return;
523 default:
441b62c1 524 dbg("%s - nonzero urb status received: %d", __func__,
0643c724 525 status);
3f542974
PS		 526 goto exit;
527 }
528
84fe6e79
TC		 529 dbg("%s urb buffer size is %d", __func__, urb->actual_length);
530 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__,
3f542974
PS		 531 mos7840_port->MsrLsr, mos7840_port->port_num);
532 data = urb->transfer_buffer;
533 regval = (__u8) data[0];
84fe6e79 534 dbg("%s data is %x", __func__, regval);
3f542974
PS		 535 if (mos7840_port->MsrLsr == 0)
536 mos7840_handle_new_msr(mos7840_port, regval);
537 else if (mos7840_port->MsrLsr == 1)
538 mos7840_handle_new_lsr(mos7840_port, regval);
539
0de9a702
ON		 540exit:
541 spin_lock(&mos7840_port->pool_lock);
542 if (!mos7840_port->zombie)
543 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
544 spin_unlock(&mos7840_port->pool_lock);
545 if (result) {
546 dev_err(&urb->dev->dev,
547 "%s - Error %d submitting interrupt urb\n",
441b62c1 548 __func__, result);
0de9a702 549 }
3f542974
PS		 550}
551
552static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
880af9db 553 __u16 *val)
3f542974
PS		 554{
555 struct usb_device *dev = mcs->port->serial->dev;
0de9a702
ON		 556 struct usb_ctrlrequest *dr = mcs->dr;
557 unsigned char *buffer = mcs->ctrl_buf;
558 int ret;
3f542974 559
3f542974
PS		 560 dr->bRequestType = MCS_RD_RTYPE;
561 dr->bRequest = MCS_RDREQ;
880af9db 562 dr->wValue = cpu_to_le16(Wval); /* 0 */
3f542974
PS		 563 dr->wIndex = cpu_to_le16(reg);
564 dr->wLength = cpu_to_le16(2);
565
566 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
567 (unsigned char *)dr, buffer, 2,
568 mos7840_control_callback, mcs);
569 mcs->control_urb->transfer_buffer_length = 2;
570 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
571 return ret;
572}
573
574/*****************************************************************************
575 * mos7840_interrupt_callback
576 * this is the callback function for when we have received data on the
577 * interrupt endpoint.
578 *****************************************************************************/
579
7d12e780 580static void mos7840_interrupt_callback(struct urb *urb)
3f542974
PS		 581{
582 int result;
583 int length;
584 struct moschip_port *mos7840_port;
585 struct usb_serial *serial;
586 __u16 Data;
587 unsigned char *data;
588 __u8 sp[5], st;
0de9a702
ON		 589 int i, rv = 0;
590 __u16 wval, wreg = 0;
0643c724 591 int status = urb->status;
3f542974 592
84fe6e79 593 dbg("%s", " : Entering");
3f542974 594
0643c724 595 switch (status) {
3f542974
PS		 596 case 0:
597 /* success */
598 break;
599 case -ECONNRESET:
600 case -ENOENT:
601 case -ESHUTDOWN:
602 /* this urb is terminated, clean up */
441b62c1 603 dbg("%s - urb shutting down with status: %d", __func__,
0643c724 604 status);
3f542974
PS		 605 return;
606 default:
441b62c1 607 dbg("%s - nonzero urb status received: %d", __func__,
0643c724 608 status);
3f542974
PS		 609 goto exit;
610 }
611
612 length = urb->actual_length;
613 data = urb->transfer_buffer;
614
cdc97792 615 serial = urb->context;
3f542974
PS		 616
617 /* Moschip get 5 bytes
618 * Byte 1 IIR Port 1 (port.number is 0)
619 * Byte 2 IIR Port 2 (port.number is 1)
620 * Byte 3 IIR Port 3 (port.number is 2)
621 * Byte 4 IIR Port 4 (port.number is 3)
622 * Byte 5 FIFO status for both */
623
624 if (length && length > 5) {
84fe6e79 625 dbg("%s", "Wrong data !!!");
3f542974
PS		 626 return;
627 }
628
629 sp[0] = (__u8) data[0];
630 sp[1] = (__u8) data[1];
631 sp[2] = (__u8) data[2];
632 sp[3] = (__u8) data[3];
633 st = (__u8) data[4];
634
635 for (i = 0; i < serial->num_ports; i++) {
636 mos7840_port = mos7840_get_port_private(serial->port[i]);
637 wval =
638 (((__u16) serial->port[i]->number -
639 (__u16) (serial->minor)) + 1) << 8;
640 if (mos7840_port->open) {
641 if (sp[i] & 0x01) {
84fe6e79 642 dbg("SP%d No Interrupt !!!", i);
3f542974
PS		 643 } else {
644 switch (sp[i] & 0x0f) {
645 case SERIAL_IIR_RLS:
646 dbg("Serial Port %d: Receiver status error or ", i);
84fe6e79 647 dbg("address bit detected in 9-bit mode");
3f542974 648 mos7840_port->MsrLsr = 1;
0de9a702 649 wreg = LINE_STATUS_REGISTER;
3f542974
PS		 650 break;
651 case SERIAL_IIR_MS:
84fe6e79 652 dbg("Serial Port %d: Modem status change", i);
3f542974 653 mos7840_port->MsrLsr = 0;
0de9a702 654 wreg = MODEM_STATUS_REGISTER;
3f542974
PS		 655 break;
656 }
0de9a702
ON		 657 spin_lock(&mos7840_port->pool_lock);
658 if (!mos7840_port->zombie) {
659 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
660 } else {
661 spin_unlock(&mos7840_port->pool_lock);
662 return;
663 }
664 spin_unlock(&mos7840_port->pool_lock);
3f542974
PS		 665 }
666 }
667 }
880af9db
AC		 668 if (!(rv < 0))
669 /* the completion handler for the control urb will resubmit */
0de9a702
ON		 670 return;
671exit:
3f542974
PS		 672 result = usb_submit_urb(urb, GFP_ATOMIC);
673 if (result) {
674 dev_err(&urb->dev->dev,
675 "%s - Error %d submitting interrupt urb\n",
441b62c1 676 __func__, result);
3f542974 677 }
3f542974
PS		 678}
679
680static int mos7840_port_paranoia_check(struct usb_serial_port *port,
681 const char *function)
682{
683 if (!port) {
684 dbg("%s - port == NULL", function);
685 return -1;
686 }
687 if (!port->serial) {
688 dbg("%s - port->serial == NULL", function);
689 return -1;
690 }
691
692 return 0;
693}
694
695/* Inline functions to check the sanity of a pointer that is passed to us */
696static int mos7840_serial_paranoia_check(struct usb_serial *serial,
697 const char *function)
698{
699 if (!serial) {
700 dbg("%s - serial == NULL", function);
701 return -1;
702 }
703 if (!serial->type) {
704 dbg("%s - serial->type == NULL!", function);
705 return -1;
706 }
707
708 return 0;
709}
710
711static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
712 const char *function)
713{
714 /* if no port was specified, or it fails a paranoia check */
715 if (!port ||
716 mos7840_port_paranoia_check(port, function) ||
717 mos7840_serial_paranoia_check(port->serial, function)) {
880af9db
AC		 718 /* then say that we don't have a valid usb_serial thing,
719 * which will end up genrating -ENODEV return values */
3f542974
PS		 720 return NULL;
721 }
722
723 return port->serial;
724}
725
726/*****************************************************************************
727 * mos7840_bulk_in_callback
728 * this is the callback function for when we have received data on the
729 * bulk in endpoint.
730 *****************************************************************************/
731
7d12e780 732static void mos7840_bulk_in_callback(struct urb *urb)
3f542974 733{
0643c724 734 int retval;
3f542974
PS		 735 unsigned char *data;
736 struct usb_serial *serial;
737 struct usb_serial_port *port;
738 struct moschip_port *mos7840_port;
739 struct tty_struct *tty;
0643c724 740 int status = urb->status;
3f542974 741
cdc97792 742 mos7840_port = urb->context;
3f542974 743 if (!mos7840_port) {
84fe6e79 744 dbg("%s", "NULL mos7840_port pointer");
50de36f7
GKH		 745 return;
746 }
747
748 if (status) {
749 dbg("nonzero read bulk status received: %d", status);
750 mos7840_port->read_urb_busy = false;
3f542974
PS		 751 return;
752 }
753
754 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 755 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 756 dbg("%s", "Port Paranoia failed");
50de36f7 757 mos7840_port->read_urb_busy = false;
3f542974
PS		 758 return;
759 }
760
441b62c1 761 serial = mos7840_get_usb_serial(port, __func__);
3f542974 762 if (!serial) {
84fe6e79 763 dbg("%s", "Bad serial pointer");
50de36f7 764 mos7840_port->read_urb_busy = false;
3f542974
PS		 765 return;
766 }
767
84fe6e79 768 dbg("%s", "Entering... ");
3f542974
PS		 769
770 data = urb->transfer_buffer;
771
84fe6e79 772 dbg("%s", "Entering ...........");
3f542974
PS		 773
774 if (urb->actual_length) {
4a90f09b 775 tty = tty_port_tty_get(&mos7840_port->port->port);
3f542974 776 if (tty) {
3f542974 777 tty_insert_flip_string(tty, data, urb->actual_length);
84fe6e79 778 dbg(" %s ", data);
3f542974 779 tty_flip_buffer_push(tty);
4a90f09b 780 tty_kref_put(tty);
3f542974
PS		 781 }
782 mos7840_port->icount.rx += urb->actual_length;
0de9a702 783 smp_wmb();
84fe6e79 784 dbg("mos7840_port->icount.rx is %d:",
3f542974
PS		 785 mos7840_port->icount.rx);
786 }
787
788 if (!mos7840_port->read_urb) {
84fe6e79 789 dbg("%s", "URB KILLED !!!");
50de36f7 790 mos7840_port->read_urb_busy = false;
3f542974
PS		 791 return;
792 }
793
3f542974 794
0de9a702 795 mos7840_port->read_urb->dev = serial->dev;
3f542974 796
50de36f7 797 mos7840_port->read_urb_busy = true;
0643c724 798 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
0de9a702 799
0643c724 800 if (retval) {
50de36f7
GKH		 801 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
802 mos7840_port->read_urb_busy = false;
3f542974
PS		 803 }
804}
805
806/*****************************************************************************
807 * mos7840_bulk_out_data_callback
880af9db
AC		 808 * this is the callback function for when we have finished sending
809 * serial data on the bulk out endpoint.
3f542974
PS		 810 *****************************************************************************/
811
7d12e780 812static void mos7840_bulk_out_data_callback(struct urb *urb)
3f542974
PS		 813{
814 struct moschip_port *mos7840_port;
815 struct tty_struct *tty;
0643c724 816 int status = urb->status;
0de9a702
ON		 817 int i;
818
cdc97792 819 mos7840_port = urb->context;
0de9a702
ON		 820 spin_lock(&mos7840_port->pool_lock);
821 for (i = 0; i < NUM_URBS; i++) {
822 if (urb == mos7840_port->write_urb_pool[i]) {
823 mos7840_port->busy[i] = 0;
824 break;
825 }
826 }
827 spin_unlock(&mos7840_port->pool_lock);
828
0643c724 829 if (status) {
84fe6e79 830 dbg("nonzero write bulk status received:%d", status);
3f542974
PS		 831 return;
832 }
833
441b62c1 834 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
84fe6e79 835 dbg("%s", "Port Paranoia failed");
3f542974
PS		 836 return;
837 }
838
84fe6e79 839 dbg("%s", "Entering .........");
3f542974 840
4a90f09b 841 tty = tty_port_tty_get(&mos7840_port->port->port);
b963a844
JS		 842 if (tty && mos7840_port->open)
843 tty_wakeup(tty);
4a90f09b 844 tty_kref_put(tty);
3f542974
PS		 845
846}
847
848/************************************************************************/
849/* 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 */
850/************************************************************************/
851#ifdef MCSSerialProbe
852static int mos7840_serial_probe(struct usb_serial *serial,
853 const struct usb_device_id *id)
854{
855
856 /*need to implement the mode_reg reading and updating\
857 structures usb_serial_ device_type\
858 (i.e num_ports, num_bulkin,bulkout etc) */
859 /* Also we can update the changes attach */
860 return 1;
861}
862#endif
863
864/*****************************************************************************
865 * mos7840_open
866 * this function is called by the tty driver when a port is opened
867 * If successful, we return 0
868 * Otherwise we return a negative error number.
869 *****************************************************************************/
870
a509a7e4 871static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
3f542974
PS		 872{
873 int response;
874 int j;
875 struct usb_serial *serial;
876 struct urb *urb;
877 __u16 Data;
878 int status;
879 struct moschip_port *mos7840_port;
0de9a702 880 struct moschip_port *port0;
3f542974 881
84fe6e79
TC		 882 dbg ("%s enter", __func__);
883
441b62c1 884 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 885 dbg("%s", "Port Paranoia failed");
3f542974
PS		 886 return -ENODEV;
887 }
888
3f542974
PS		 889 serial = port->serial;
890
441b62c1 891 if (mos7840_serial_paranoia_check(serial, __func__)) {
84fe6e79 892 dbg("%s", "Serial Paranoia failed");
3f542974
PS		 893 return -ENODEV;
894 }
895
896 mos7840_port = mos7840_get_port_private(port);
0de9a702 897 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 898
0de9a702 899 if (mos7840_port == NULL || port0 == NULL)
3f542974
PS		 900 return -ENODEV;
901
902 usb_clear_halt(serial->dev, port->write_urb->pipe);
903 usb_clear_halt(serial->dev, port->read_urb->pipe);
0de9a702 904 port0->open_ports++;
3f542974
PS		 905
906 /* Initialising the write urb pool */
907 for (j = 0; j < NUM_URBS; ++j) {
0de9a702 908 urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974
PS		 909 mos7840_port->write_urb_pool[j] = urb;
910
911 if (urb == NULL) {
194343d9 912 dev_err(&port->dev, "No more urbs???\n");
3f542974
PS		 913 continue;
914 }
915
880af9db
AC		 916 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
917 GFP_KERNEL);
3f542974 918 if (!urb->transfer_buffer) {
0de9a702
ON		 919 usb_free_urb(urb);
920 mos7840_port->write_urb_pool[j] = NULL;
194343d9
GKH		 921 dev_err(&port->dev,
922 "%s-out of memory for urb buffers.\n",
923 __func__);
3f542974
PS		 924 continue;
925 }
926 }
927
928/*****************************************************************************
929 * Initialize MCS7840 -- Write Init values to corresponding Registers
930 *
931 * Register Index
932 * 1 : IER
933 * 2 : FCR
934 * 3 : LCR
935 * 4 : MCR
936 *
937 * 0x08 : SP1/2 Control Reg
938 *****************************************************************************/
939
880af9db 940 /* NEED to check the following Block */
3f542974 941
3f542974
PS		 942 Data = 0x0;
943 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
944 if (status < 0) {
84fe6e79 945 dbg("Reading Spreg failed");
3f542974
PS		 946 return -1;
947 }
948 Data |= 0x80;
949 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
950 if (status < 0) {
84fe6e79 951 dbg("writing Spreg failed");
3f542974
PS		 952 return -1;
953 }
954
955 Data &= ~0x80;
956 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
957 if (status < 0) {
84fe6e79 958 dbg("writing Spreg failed");
3f542974
PS		 959 return -1;
960 }
880af9db 961 /* End of block to be checked */
3f542974 962
3f542974 963 Data = 0x0;
880af9db
AC		 964 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
965 &Data);
3f542974 966 if (status < 0) {
84fe6e79 967 dbg("Reading Controlreg failed");
3f542974
PS		 968 return -1;
969 }
880af9db
AC		 970 Data |= 0x08; /* Driver done bit */
971 Data |= 0x20; /* rx_disable */
972 status = mos7840_set_reg_sync(port,
973 mos7840_port->ControlRegOffset, Data);
3f542974 974 if (status < 0) {
84fe6e79 975 dbg("writing Controlreg failed");
3f542974
PS		 976 return -1;
977 }
880af9db
AC		 978 /* do register settings here */
979 /* Set all regs to the device default values. */
980 /***********************************
981 * First Disable all interrupts.
982 ***********************************/
3f542974 983 Data = 0x00;
3f542974
PS		 984 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
985 if (status < 0) {
84fe6e79 986 dbg("disabling interrupts failed");
3f542974
PS		 987 return -1;
988 }
880af9db 989 /* Set FIFO_CONTROL_REGISTER to the default value */
3f542974 990 Data = 0x00;
3f542974
PS		 991 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
992 if (status < 0) {
84fe6e79 993 dbg("Writing FIFO_CONTROL_REGISTER failed");
3f542974
PS		 994 return -1;
995 }
996
997 Data = 0xcf;
3f542974
PS		 998 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
999 if (status < 0) {
84fe6e79 1000 dbg("Writing FIFO_CONTROL_REGISTER failed");
3f542974
PS		 1001 return -1;
1002 }
1003
1004 Data = 0x03;
3f542974
PS		 1005 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1006 mos7840_port->shadowLCR = Data;
1007
1008 Data = 0x0b;
3f542974
PS		 1009 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1010 mos7840_port->shadowMCR = Data;
1011
1012 Data = 0x00;
3f542974
PS		 1013 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1014 mos7840_port->shadowLCR = Data;
1015
880af9db 1016 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1017 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1018
1019 Data = 0x0c;
3f542974
PS		 1020 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1021
1022 Data = 0x0;
3f542974
PS		 1023 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1024
1025 Data = 0x00;
3f542974
PS		 1026 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1027
1028 Data = Data & ~SERIAL_LCR_DLAB;
3f542974
PS		 1029 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1030 mos7840_port->shadowLCR = Data;
1031
880af9db 1032 /* clearing Bulkin and Bulkout Fifo */
3f542974 1033 Data = 0x0;
3f542974
PS		 1034 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1035
1036 Data = Data | 0x0c;
3f542974
PS		 1037 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1038
1039 Data = Data & ~0x0c;
3f542974 1040 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
880af9db 1041 /* Finally enable all interrupts */
3f542974 1042 Data = 0x0c;
3f542974
PS		 1043 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1044
880af9db 1045 /* clearing rx_disable */
3f542974 1046 Data = 0x0;
880af9db
AC		 1047 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1048 &Data);
3f542974 1049 Data = Data & ~0x20;
880af9db
AC		 1050 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1051 Data);
3f542974 1052
880af9db 1053 /* rx_negate */
3f542974 1054 Data = 0x0;
880af9db
AC		 1055 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1056 &Data);
3f542974 1057 Data = Data | 0x10;
880af9db
AC		 1058 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1059 Data);
3f542974 1060
880af9db
AC		 1061 /* Check to see if we've set up our endpoint info yet *
1062 * (can't set it up in mos7840_startup as the structures *
1063 * were not set up at that time.) */
0de9a702 1064 if (port0->open_ports == 1) {
3f542974 1065 if (serial->port[0]->interrupt_in_buffer == NULL) {
3f542974 1066 /* set up interrupt urb */
3f542974 1067 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
880af9db
AC		 1068 serial->dev,
1069 usb_rcvintpipe(serial->dev,
1070 serial->port[0]->interrupt_in_endpointAddress),
1071 serial->port[0]->interrupt_in_buffer,
1072 serial->port[0]->interrupt_in_urb->
1073 transfer_buffer_length,
1074 mos7840_interrupt_callback,
1075 serial,
1076 serial->port[0]->interrupt_in_urb->interval);
3f542974
PS		 1077
1078 /* start interrupt read for mos7840 *
1079 * will continue as long as mos7840 is connected */
1080
1081 response =
1082 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1083 GFP_KERNEL);
1084 if (response) {
194343d9
GKH		 1085 dev_err(&port->dev, "%s - Error %d submitting "
1086 "interrupt urb\n", __func__, response);
3f542974
PS		 1087 }
1088
1089 }
1090
1091 }
1092
1093 /* see if we've set up our endpoint info yet *
1094 * (can't set it up in mos7840_startup as the *
1095 * structures were not set up at that time.) */
1096
84fe6e79
TC		 1097 dbg("port number is %d", port->number);
1098 dbg("serial number is %d", port->serial->minor);
1099 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
1100 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
1101 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
1102 dbg("port's number in the device is %d", mos7840_port->port_num);
3f542974
PS		 1103 mos7840_port->read_urb = port->read_urb;
1104
1105 /* set up our bulk in urb */
1106
1107 usb_fill_bulk_urb(mos7840_port->read_urb,
1108 serial->dev,
1109 usb_rcvbulkpipe(serial->dev,
1110 port->bulk_in_endpointAddress),
1111 port->bulk_in_buffer,
1112 mos7840_port->read_urb->transfer_buffer_length,
1113 mos7840_bulk_in_callback, mos7840_port);
1114
84fe6e79 1115 dbg("mos7840_open: bulkin endpoint is %d",
3f542974 1116 port->bulk_in_endpointAddress);
50de36f7 1117 mos7840_port->read_urb_busy = true;
3f542974
PS		 1118 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1119 if (response) {
194343d9
GKH		 1120 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1121 __func__, response);
50de36f7 1122 mos7840_port->read_urb_busy = false;
3f542974
PS		 1123 }
1124
1125 /* initialize our wait queues */
1126 init_waitqueue_head(&mos7840_port->wait_chase);
1127 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1128
1129 /* initialize our icount structure */
1130 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1131
1132 /* initialize our port settings */
880af9db
AC		 1133 /* Must set to enable ints! */
1134 mos7840_port->shadowMCR = MCR_MASTER_IE;
3f542974
PS		 1135 /* send a open port command */
1136 mos7840_port->open = 1;
880af9db 1137 /* mos7840_change_port_settings(mos7840_port,old_termios); */
3f542974
PS		 1138 mos7840_port->icount.tx = 0;
1139 mos7840_port->icount.rx = 0;
1140
84fe6e79 1141 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
880af9db 1142 serial, mos7840_port, port);
3f542974 1143
84fe6e79
TC		 1144 dbg ("%s leave", __func__);
1145
3f542974
PS		 1146 return 0;
1147
1148}
1149
1150/*****************************************************************************
1151 * mos7840_chars_in_buffer
1152 * this function is called by the tty driver when it wants to know how many
1153 * bytes of data we currently have outstanding in the port (data that has
1154 * been written, but hasn't made it out the port yet)
1155 * If successful, we return the number of bytes left to be written in the
1156 * system,
95da310e 1157 * Otherwise we return zero.
3f542974
PS		 1158 *****************************************************************************/
1159
95da310e 1160static int mos7840_chars_in_buffer(struct tty_struct *tty)
3f542974 1161{
95da310e 1162 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1163 int i;
1164 int chars = 0;
0de9a702 1165 unsigned long flags;
3f542974
PS		 1166 struct moschip_port *mos7840_port;
1167
84fe6e79 1168 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
3f542974 1169
441b62c1 1170 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1171 dbg("%s", "Invalid port");
95da310e 1172 return 0;
3f542974
PS		 1173 }
1174
1175 mos7840_port = mos7840_get_port_private(port);
1176 if (mos7840_port == NULL) {
84fe6e79 1177 dbg("%s", "mos7840_break:leaving ...........");
95da310e 1178 return 0;
3f542974
PS		 1179 }
1180
880af9db 1181 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
95da310e
AC		 1182 for (i = 0; i < NUM_URBS; ++i)
1183 if (mos7840_port->busy[i])
3f542974 1184 chars += URB_TRANSFER_BUFFER_SIZE;
880af9db 1185 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
441b62c1 1186 dbg("%s - returns %d", __func__, chars);
0de9a702 1187 return chars;
3f542974
PS		 1188
1189}
1190
3f542974
PS		 1191/*****************************************************************************
1192 * mos7840_close
1193 * this function is called by the tty driver when a port is closed
1194 *****************************************************************************/
1195
335f8514 1196static void mos7840_close(struct usb_serial_port *port)
3f542974
PS		 1197{
1198 struct usb_serial *serial;
1199 struct moschip_port *mos7840_port;
0de9a702 1200 struct moschip_port *port0;
3f542974
PS		 1201 int j;
1202 __u16 Data;
1203
84fe6e79 1204 dbg("%s", "mos7840_close:entering...");
3f542974 1205
441b62c1 1206 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1207 dbg("%s", "Port Paranoia failed");
3f542974
PS		 1208 return;
1209 }
1210
441b62c1 1211 serial = mos7840_get_usb_serial(port, __func__);
3f542974 1212 if (!serial) {
84fe6e79 1213 dbg("%s", "Serial Paranoia failed");
3f542974
PS		 1214 return;
1215 }
1216
1217 mos7840_port = mos7840_get_port_private(port);
0de9a702 1218 port0 = mos7840_get_port_private(serial->port[0]);
3f542974 1219
0de9a702 1220 if (mos7840_port == NULL || port0 == NULL)
3f542974 1221 return;
3f542974
PS		 1222
1223 for (j = 0; j < NUM_URBS; ++j)
1224 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1225
1226 /* Freeing Write URBs */
1227 for (j = 0; j < NUM_URBS; ++j) {
1228 if (mos7840_port->write_urb_pool[j]) {
1229 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1230 kfree(mos7840_port->write_urb_pool[j]->
1231 transfer_buffer);
1232
1233 usb_free_urb(mos7840_port->write_urb_pool[j]);
1234 }
1235 }
1236
3f542974
PS		 1237 /* While closing port, shutdown all bulk read, write *
1238 * and interrupt read if they exists */
1239 if (serial->dev) {
3f542974 1240 if (mos7840_port->write_urb) {
84fe6e79 1241 dbg("%s", "Shutdown bulk write");
3f542974
PS		 1242 usb_kill_urb(mos7840_port->write_urb);
1243 }
3f542974 1244 if (mos7840_port->read_urb) {
84fe6e79 1245 dbg("%s", "Shutdown bulk read");
3f542974 1246 usb_kill_urb(mos7840_port->read_urb);
50de36f7 1247 mos7840_port->read_urb_busy = false;
3f542974
PS		 1248 }
1249 if ((&mos7840_port->control_urb)) {
84fe6e79 1250 dbg("%s", "Shutdown control read");
880af9db 1251 /*/ usb_kill_urb (mos7840_port->control_urb); */
3f542974
PS		 1252 }
1253 }
880af9db
AC		 1254/* if(mos7840_port->ctrl_buf != NULL) */
1255/* kfree(mos7840_port->ctrl_buf); */
0de9a702 1256 port0->open_ports--;
84fe6e79 1257 dbg("mos7840_num_open_ports in close%d:in port%d",
0de9a702
ON		 1258 port0->open_ports, port->number);
1259 if (port0->open_ports == 0) {
3f542974 1260 if (serial->port[0]->interrupt_in_urb) {
84fe6e79 1261 dbg("%s", "Shutdown interrupt_in_urb");
0de9a702 1262 usb_kill_urb(serial->port[0]->interrupt_in_urb);
3f542974
PS		 1263 }
1264 }
1265
1266 if (mos7840_port->write_urb) {
1267 /* if this urb had a transfer buffer already (old tx) free it */
880af9db 1268 if (mos7840_port->write_urb->transfer_buffer != NULL)
3f542974 1269 kfree(mos7840_port->write_urb->transfer_buffer);
3f542974
PS		 1270 usb_free_urb(mos7840_port->write_urb);
1271 }
1272
1273 Data = 0x0;
1274 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1275
1276 Data = 0x00;
1277 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1278
1279 mos7840_port->open = 0;
1280
84fe6e79 1281 dbg("%s", "Leaving ............");
3f542974
PS		 1282}
1283
1284/************************************************************************
1285 *
1286 * mos7840_block_until_chase_response
1287 *
1288 * This function will block the close until one of the following:
1289 * 1. Response to our Chase comes from mos7840
dc0d5c1e 1290 * 2. A timeout of 10 seconds without activity has expired
3f542974
PS		 1291 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1292 *
1293 ************************************************************************/
1294
95da310e
AC		 1295static void mos7840_block_until_chase_response(struct tty_struct *tty,
1296 struct moschip_port *mos7840_port)
3f542974
PS		 1297{
1298 int timeout = 1 * HZ;
1299 int wait = 10;
1300 int count;
1301
1302 while (1) {
95da310e 1303 count = mos7840_chars_in_buffer(tty);
3f542974
PS		 1304
1305 /* Check for Buffer status */
880af9db 1306 if (count <= 0)
3f542974 1307 return;
3f542974
PS		 1308
1309 /* Block the thread for a while */
1310 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1311 timeout);
1312 /* No activity.. count down section */
1313 wait--;
1314 if (wait == 0) {
441b62c1 1315 dbg("%s - TIMEOUT", __func__);
3f542974
PS		 1316 return;
1317 } else {
dc0d5c1e 1318 /* Reset timeout value back to seconds */
3f542974
PS		 1319 wait = 10;
1320 }
1321 }
1322
1323}
1324
1325/*****************************************************************************
1326 * mos7840_break
1327 * this function sends a break to the port
1328 *****************************************************************************/
95da310e 1329static void mos7840_break(struct tty_struct *tty, int break_state)
3f542974 1330{
95da310e 1331 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1332 unsigned char data;
1333 struct usb_serial *serial;
1334 struct moschip_port *mos7840_port;
1335
84fe6e79
TC		 1336 dbg("%s", "Entering ...........");
1337 dbg("mos7840_break: Start");
3f542974 1338
441b62c1 1339 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1340 dbg("%s", "Port Paranoia failed");
3f542974
PS		 1341 return;
1342 }
1343
441b62c1 1344 serial = mos7840_get_usb_serial(port, __func__);
3f542974 1345 if (!serial) {
84fe6e79 1346 dbg("%s", "Serial Paranoia failed");
3f542974
PS		 1347 return;
1348 }
1349
1350 mos7840_port = mos7840_get_port_private(port);
1351
880af9db 1352 if (mos7840_port == NULL)
3f542974 1353 return;
3f542974 1354
95da310e 1355 if (serial->dev)
3f542974 1356 /* flush and block until tx is empty */
95da310e 1357 mos7840_block_until_chase_response(tty, mos7840_port);
3f542974 1358
95da310e 1359 if (break_state == -1)
3f542974 1360 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
95da310e 1361 else
3f542974 1362 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
3f542974 1363
6b447f04 1364 /* FIXME: no locking on shadowLCR anywhere in driver */
3f542974 1365 mos7840_port->shadowLCR = data;
84fe6e79 1366 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
3f542974
PS		 1367 mos7840_port->shadowLCR);
1368 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1369 mos7840_port->shadowLCR);
1370
1371 return;
1372}
1373
1374/*****************************************************************************
1375 * mos7840_write_room
1376 * this function is called by the tty driver when it wants to know how many
1377 * bytes of data we can accept for a specific port.
1378 * If successful, we return the amount of room that we have for this port
1379 * Otherwise we return a negative error number.
1380 *****************************************************************************/
1381
95da310e 1382static int mos7840_write_room(struct tty_struct *tty)
3f542974 1383{
95da310e 1384 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1385 int i;
1386 int room = 0;
0de9a702 1387 unsigned long flags;
3f542974
PS		 1388 struct moschip_port *mos7840_port;
1389
84fe6e79 1390 dbg("%s", " mos7840_write_room:entering ...........");
3f542974 1391
441b62c1 1392 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79
TC		 1393 dbg("%s", "Invalid port");
1394 dbg("%s", " mos7840_write_room:leaving ...........");
3f542974
PS		 1395 return -1;
1396 }
1397
1398 mos7840_port = mos7840_get_port_private(port);
1399 if (mos7840_port == NULL) {
84fe6e79 1400 dbg("%s", "mos7840_break:leaving ...........");
3f542974
PS		 1401 return -1;
1402 }
1403
0de9a702 1404 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1405 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1406 if (!mos7840_port->busy[i])
3f542974 1407 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1408 }
0de9a702 1409 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1410
0de9a702 1411 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
441b62c1 1412 dbg("%s - returns %d", __func__, room);
0de9a702 1413 return room;
3f542974
PS		 1414
1415}
1416
1417/*****************************************************************************
1418 * mos7840_write
1419 * this function is called by the tty driver when data should be written to
1420 * the port.
1421 * If successful, we return the number of bytes written, otherwise we
1422 * return a negative error number.
1423 *****************************************************************************/
1424
95da310e 1425static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1426 const unsigned char *data, int count)
1427{
1428 int status;
1429 int i;
1430 int bytes_sent = 0;
1431 int transfer_size;
0de9a702 1432 unsigned long flags;
3f542974
PS		 1433
1434 struct moschip_port *mos7840_port;
1435 struct usb_serial *serial;
1436 struct urb *urb;
880af9db 1437 /* __u16 Data; */
3f542974
PS		 1438 const unsigned char *current_position = data;
1439 unsigned char *data1;
84fe6e79
TC		 1440 dbg("%s", "entering ...........");
1441 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
880af9db 1442 mos7840_port->shadowLCR); */
3f542974
PS		 1443
1444#ifdef NOTMOS7840
1445 Data = 0x00;
3f542974
PS		 1446 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1447 mos7840_port->shadowLCR = Data;
84fe6e79
TC		 1448 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
1449 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
3f542974
PS		 1450 mos7840_port->shadowLCR);
1451
880af9db
AC		 1452 /* Data = 0x03; */
1453 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1454 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1455
880af9db 1456 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1457 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1458
880af9db
AC		 1459 /* Data = 0x0c; */
1460 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1461 Data = 0x00;
3f542974 1462 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
84fe6e79 1463 dbg("mos7840_write:DLL value is %x", Data);
3f542974
PS		 1464
1465 Data = 0x0;
3f542974 1466 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
84fe6e79 1467 dbg("mos7840_write:DLM value is %x", Data);
3f542974
PS		 1468
1469 Data = Data & ~SERIAL_LCR_DLAB;
84fe6e79 1470 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
3f542974 1471 mos7840_port->shadowLCR);
3f542974
PS		 1472 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1473#endif
1474
441b62c1 1475 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1476 dbg("%s", "Port Paranoia failed");
3f542974
PS		 1477 return -1;
1478 }
1479
1480 serial = port->serial;
441b62c1 1481 if (mos7840_serial_paranoia_check(serial, __func__)) {
84fe6e79 1482 dbg("%s", "Serial Paranoia failed");
3f542974
PS		 1483 return -1;
1484 }
1485
1486 mos7840_port = mos7840_get_port_private(port);
1487 if (mos7840_port == NULL) {
84fe6e79 1488 dbg("%s", "mos7840_port is NULL");
3f542974
PS		 1489 return -1;
1490 }
1491
1492 /* try to find a free urb in the list */
1493 urb = NULL;
1494
0de9a702 1495 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1496 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1497 if (!mos7840_port->busy[i]) {
1498 mos7840_port->busy[i] = 1;
3f542974 1499 urb = mos7840_port->write_urb_pool[i];
84fe6e79 1500 dbg("URB:%d", i);
3f542974
PS		 1501 break;
1502 }
1503 }
0de9a702 1504 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1505
1506 if (urb == NULL) {
441b62c1 1507 dbg("%s - no more free urbs", __func__);
3f542974
PS		 1508 goto exit;
1509 }
1510
1511 if (urb->transfer_buffer == NULL) {
1512 urb->transfer_buffer =
1513 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1514
1515 if (urb->transfer_buffer == NULL) {
194343d9
GKH		 1516 dev_err(&port->dev, "%s no more kernel memory...\n",
1517 __func__);
3f542974
PS		 1518 goto exit;
1519 }
1520 }
1521 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1522
97c4965d 1523 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1524
1525 /* fill urb with data and submit */
1526 usb_fill_bulk_urb(urb,
1527 serial->dev,
1528 usb_sndbulkpipe(serial->dev,
1529 port->bulk_out_endpointAddress),
1530 urb->transfer_buffer,
1531 transfer_size,
1532 mos7840_bulk_out_data_callback, mos7840_port);
1533
1534 data1 = urb->transfer_buffer;
84fe6e79 1535 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
3f542974
PS		 1536
1537 /* send it down the pipe */
1538 status = usb_submit_urb(urb, GFP_ATOMIC);
1539
1540 if (status) {
0de9a702 1541 mos7840_port->busy[i] = 0;
194343d9
GKH		 1542 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1543 "with status = %d\n", __func__, status);
3f542974
PS		 1544 bytes_sent = status;
1545 goto exit;
1546 }
1547 bytes_sent = transfer_size;
1548 mos7840_port->icount.tx += transfer_size;
0de9a702 1549 smp_wmb();
84fe6e79 1550 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
95da310e 1551exit:
3f542974
PS		 1552 return bytes_sent;
1553
1554}
1555
1556/*****************************************************************************
1557 * mos7840_throttle
1558 * this function is called by the tty driver when it wants to stop the data
1559 * being read from the port.
1560 *****************************************************************************/
1561
95da310e 1562static void mos7840_throttle(struct tty_struct *tty)
3f542974 1563{
95da310e 1564 struct usb_serial_port *port = tty->driver_data;
3f542974 1565 struct moschip_port *mos7840_port;
3f542974
PS		 1566 int status;
1567
441b62c1 1568 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1569 dbg("%s", "Invalid port");
3f542974
PS		 1570 return;
1571 }
1572
84fe6e79 1573 dbg("- port %d", port->number);
3f542974
PS		 1574
1575 mos7840_port = mos7840_get_port_private(port);
1576
1577 if (mos7840_port == NULL)
1578 return;
1579
1580 if (!mos7840_port->open) {
84fe6e79 1581 dbg("%s", "port not opened");
3f542974
PS		 1582 return;
1583 }
1584
84fe6e79 1585 dbg("%s", "Entering ..........");
3f542974 1586
3f542974
PS		 1587 /* if we are implementing XON/XOFF, send the stop character */
1588 if (I_IXOFF(tty)) {
1589 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1590 status = mos7840_write(tty, port, &stop_char, 1);
1591 if (status <= 0)
3f542974 1592 return;
3f542974 1593 }
3f542974
PS		 1594 /* if we are implementing RTS/CTS, toggle that line */
1595 if (tty->termios->c_cflag & CRTSCTS) {
1596 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1597 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1598 mos7840_port->shadowMCR);
95da310e 1599 if (status < 0)
3f542974 1600 return;
3f542974
PS		 1601 }
1602
1603 return;
1604}
1605
1606/*****************************************************************************
1607 * mos7840_unthrottle
880af9db
AC		 1608 * this function is called by the tty driver when it wants to resume
1609 * the data being read from the port (called after mos7840_throttle is
1610 * called)
3f542974 1611 *****************************************************************************/
95da310e 1612static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1613{
95da310e 1614 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1615 int status;
1616 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1617
441b62c1 1618 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1619 dbg("%s", "Invalid port");
3f542974
PS		 1620 return;
1621 }
1622
1623 if (mos7840_port == NULL)
1624 return;
1625
1626 if (!mos7840_port->open) {
441b62c1 1627 dbg("%s - port not opened", __func__);
3f542974
PS		 1628 return;
1629 }
1630
84fe6e79 1631 dbg("%s", "Entering ..........");
3f542974 1632
3f542974
PS		 1633 /* if we are implementing XON/XOFF, send the start character */
1634 if (I_IXOFF(tty)) {
1635 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1636 status = mos7840_write(tty, port, &start_char, 1);
1637 if (status <= 0)
3f542974 1638 return;
3f542974
PS		 1639 }
1640
1641 /* if we are implementing RTS/CTS, toggle that line */
1642 if (tty->termios->c_cflag & CRTSCTS) {
1643 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1644 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1645 mos7840_port->shadowMCR);
95da310e 1646 if (status < 0)
3f542974 1647 return;
3f542974 1648 }
3f542974
PS		 1649}
1650
95da310e 1651static int mos7840_tiocmget(struct tty_struct *tty, struct file *file)
3f542974 1652{
95da310e 1653 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1654 struct moschip_port *mos7840_port;
1655 unsigned int result;
1656 __u16 msr;
1657 __u16 mcr;
880af9db 1658 int status;
3f542974
PS		 1659 mos7840_port = mos7840_get_port_private(port);
1660
441b62c1 1661 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1662
1663 if (mos7840_port == NULL)
1664 return -ENODEV;
1665
1666 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1667 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1668 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1669 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1670 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1671 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1672 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1673 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1674 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1675
441b62c1 1676 dbg("%s - 0x%04X", __func__, result);
3f542974
PS		 1677
1678 return result;
1679}
1680
95da310e 1681static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
3f542974
PS		 1682 unsigned int set, unsigned int clear)
1683{
95da310e 1684 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1685 struct moschip_port *mos7840_port;
1686 unsigned int mcr;
87521c46 1687 int status;
3f542974 1688
441b62c1 1689 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1690
1691 mos7840_port = mos7840_get_port_private(port);
1692
1693 if (mos7840_port == NULL)
1694 return -ENODEV;
1695
e2984494 1696 /* FIXME: What locks the port registers ? */
3f542974
PS		 1697 mcr = mos7840_port->shadowMCR;
1698 if (clear & TIOCM_RTS)
1699 mcr &= ~MCR_RTS;
1700 if (clear & TIOCM_DTR)
1701 mcr &= ~MCR_DTR;
1702 if (clear & TIOCM_LOOP)
1703 mcr &= ~MCR_LOOPBACK;
1704
1705 if (set & TIOCM_RTS)
1706 mcr |= MCR_RTS;
1707 if (set & TIOCM_DTR)
1708 mcr |= MCR_DTR;
1709 if (set & TIOCM_LOOP)
1710 mcr |= MCR_LOOPBACK;
1711
1712 mos7840_port->shadowMCR = mcr;
1713
3f542974
PS		 1714 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1715 if (status < 0) {
84fe6e79 1716 dbg("setting MODEM_CONTROL_REGISTER Failed");
87521c46 1717 return status;
3f542974
PS		 1718 }
1719
1720 return 0;
1721}
1722
1723/*****************************************************************************
1724 * mos7840_calc_baud_rate_divisor
1725 * this function calculates the proper baud rate divisor for the specified
1726 * baud rate.
1727 *****************************************************************************/
1728static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
880af9db 1729 __u16 *clk_sel_val)
3f542974
PS		 1730{
1731
441b62c1 1732 dbg("%s - %d", __func__, baudRate);
3f542974
PS		 1733
1734 if (baudRate <= 115200) {
1735 *divisor = 115200 / baudRate;
1736 *clk_sel_val = 0x0;
1737 }
1738 if ((baudRate > 115200) && (baudRate <= 230400)) {
1739 *divisor = 230400 / baudRate;
1740 *clk_sel_val = 0x10;
1741 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1742 *divisor = 403200 / baudRate;
1743 *clk_sel_val = 0x20;
1744 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1745 *divisor = 460800 / baudRate;
1746 *clk_sel_val = 0x30;
1747 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1748 *divisor = 806400 / baudRate;
1749 *clk_sel_val = 0x40;
1750 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1751 *divisor = 921600 / baudRate;
1752 *clk_sel_val = 0x50;
1753 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1754 *divisor = 1572864 / baudRate;
1755 *clk_sel_val = 0x60;
1756 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1757 *divisor = 3145728 / baudRate;
1758 *clk_sel_val = 0x70;
1759 }
1760 return 0;
1761
1762#ifdef NOTMCS7840
1763
1764 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1765 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1766 *divisor = mos7840_divisor_table[i].Divisor;
1767 return 0;
1768 }
1769 }
1770
1771 /* After trying for all the standard baud rates *
1772 * Try calculating the divisor for this baud rate */
1773
1774 if (baudrate > 75 && baudrate < 230400) {
1775 /* get the divisor */
1776 custom = (__u16) (230400L / baudrate);
1777
1778 /* Check for round off */
1779 round1 = (__u16) (2304000L / baudrate);
1780 round = (__u16) (round1 - (custom * 10));
880af9db 1781 if (round > 4)
3f542974 1782 custom++;
3f542974
PS		 1783 *divisor = custom;
1784
84fe6e79 1785 dbg(" Baud %d = %d", baudrate, custom);
3f542974
PS		 1786 return 0;
1787 }
1788
84fe6e79 1789 dbg("%s", " Baud calculation Failed...");
3f542974
PS		 1790 return -1;
1791#endif
1792}
1793
1794/*****************************************************************************
1795 * mos7840_send_cmd_write_baud_rate
1796 * this function sends the proper command to change the baud rate of the
1797 * specified port.
1798 *****************************************************************************/
1799
1800static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1801 int baudRate)
1802{
1803 int divisor = 0;
1804 int status;
1805 __u16 Data;
1806 unsigned char number;
1807 __u16 clk_sel_val;
1808 struct usb_serial_port *port;
1809
1810 if (mos7840_port == NULL)
1811 return -1;
1812
1813 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 1814 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1815 dbg("%s", "Invalid port");
3f542974
PS		 1816 return -1;
1817 }
1818
441b62c1 1819 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
84fe6e79 1820 dbg("%s", "Invalid Serial");
3f542974
PS		 1821 return -1;
1822 }
1823
84fe6e79 1824 dbg("%s", "Entering ..........");
3f542974
PS		 1825
1826 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1827
441b62c1 1828 dbg("%s - port = %d, baud = %d", __func__,
3f542974 1829 mos7840_port->port->number, baudRate);
880af9db 1830 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1831 if (baudRate > 115200) {
1832#ifdef HW_flow_control
880af9db
AC		 1833 /* NOTE: need to see the pther register to modify */
1834 /* setting h/w flow control bit to 1 */
3f542974
PS		 1835 Data = 0x2b;
1836 mos7840_port->shadowMCR = Data;
880af9db
AC		 1837 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1838 Data);
3f542974 1839 if (status < 0) {
84fe6e79 1840 dbg("Writing spreg failed in set_serial_baud");
3f542974
PS		 1841 return -1;
1842 }
1843#endif
1844
1845 } else {
1846#ifdef HW_flow_control
880af9db 1847 / *setting h/w flow control bit to 0 */
3f542974
PS		 1848 Data = 0xb;
1849 mos7840_port->shadowMCR = Data;
880af9db
AC		 1850 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1851 Data);
3f542974 1852 if (status < 0) {
84fe6e79 1853 dbg("Writing spreg failed in set_serial_baud");
3f542974
PS		 1854 return -1;
1855 }
1856#endif
1857
1858 }
1859
880af9db 1860 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1861 clk_sel_val = 0x0;
1862 Data = 0x0;
880af9db 1863 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
3f542974 1864 &clk_sel_val);
880af9db
AC		 1865 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1866 &Data);
3f542974 1867 if (status < 0) {
84fe6e79 1868 dbg("reading spreg failed in set_serial_baud");
3f542974
PS		 1869 return -1;
1870 }
1871 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1872 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1873 Data);
3f542974 1874 if (status < 0) {
84fe6e79 1875 dbg("Writing spreg failed in set_serial_baud");
3f542974
PS		 1876 return -1;
1877 }
1878 /* Calculate the Divisor */
1879
1880 if (status) {
194343d9 1881 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1882 return status;
1883 }
1884 /* Enable access to divisor latch */
1885 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1886 mos7840_port->shadowLCR = Data;
1887 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1888
1889 /* Write the divisor */
1890 Data = (unsigned char)(divisor & 0xff);
84fe6e79 1891 dbg("set_serial_baud Value to write DLL is %x", Data);
3f542974
PS		 1892 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1893
1894 Data = (unsigned char)((divisor & 0xff00) >> 8);
84fe6e79 1895 dbg("set_serial_baud Value to write DLM is %x", Data);
3f542974
PS		 1896 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1897
1898 /* Disable access to divisor latch */
1899 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1900 mos7840_port->shadowLCR = Data;
1901 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1902
1903 }
3f542974
PS		 1904 return status;
1905}
1906
1907/*****************************************************************************
1908 * mos7840_change_port_settings
1909 * This routine is called to set the UART on the device to match
1910 * the specified new settings.
1911 *****************************************************************************/
1912
95da310e
AC		 1913static void mos7840_change_port_settings(struct tty_struct *tty,
1914 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1915{
3f542974
PS		 1916 int baud;
1917 unsigned cflag;
1918 unsigned iflag;
1919 __u8 lData;
1920 __u8 lParity;
1921 __u8 lStop;
1922 int status;
1923 __u16 Data;
1924 struct usb_serial_port *port;
1925 struct usb_serial *serial;
1926
1927 if (mos7840_port == NULL)
1928 return;
1929
1930 port = (struct usb_serial_port *)mos7840_port->port;
1931
441b62c1 1932 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1933 dbg("%s", "Invalid port");
3f542974
PS		 1934 return;
1935 }
1936
441b62c1 1937 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
84fe6e79 1938 dbg("%s", "Invalid Serial");
3f542974
PS		 1939 return;
1940 }
1941
1942 serial = port->serial;
1943
441b62c1 1944 dbg("%s - port %d", __func__, mos7840_port->port->number);
3f542974
PS		 1945
1946 if (!mos7840_port->open) {
441b62c1 1947 dbg("%s - port not opened", __func__);
3f542974
PS		 1948 return;
1949 }
1950
84fe6e79 1951 dbg("%s", "Entering ..........");
3f542974
PS		 1952
1953 lData = LCR_BITS_8;
1954 lStop = LCR_STOP_1;
1955 lParity = LCR_PAR_NONE;
1956
1957 cflag = tty->termios->c_cflag;
1958 iflag = tty->termios->c_iflag;
1959
1960 /* Change the number of bits */
1961 if (cflag & CSIZE) {
1962 switch (cflag & CSIZE) {
1963 case CS5:
1964 lData = LCR_BITS_5;
1965 break;
1966
1967 case CS6:
1968 lData = LCR_BITS_6;
1969 break;
1970
1971 case CS7:
1972 lData = LCR_BITS_7;
1973 break;
1974 default:
1975 case CS8:
1976 lData = LCR_BITS_8;
1977 break;
1978 }
1979 }
1980 /* Change the Parity bit */
1981 if (cflag & PARENB) {
1982 if (cflag & PARODD) {
1983 lParity = LCR_PAR_ODD;
441b62c1 1984 dbg("%s - parity = odd", __func__);
3f542974
PS		 1985 } else {
1986 lParity = LCR_PAR_EVEN;
441b62c1 1987 dbg("%s - parity = even", __func__);
3f542974
PS		 1988 }
1989
1990 } else {
441b62c1 1991 dbg("%s - parity = none", __func__);
3f542974
PS		 1992 }
1993
880af9db 1994 if (cflag & CMSPAR)
3f542974 1995 lParity = lParity | 0x20;
3f542974
PS		 1996
1997 /* Change the Stop bit */
1998 if (cflag & CSTOPB) {
1999 lStop = LCR_STOP_2;
441b62c1 2000 dbg("%s - stop bits = 2", __func__);
3f542974
PS		 2001 } else {
2002 lStop = LCR_STOP_1;
441b62c1 2003 dbg("%s - stop bits = 1", __func__);
3f542974
PS		 2004 }
2005
2006 /* Update the LCR with the correct value */
2007 mos7840_port->shadowLCR &=
2008 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2009 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2010
84fe6e79 2011 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
3f542974
PS		 2012 mos7840_port->shadowLCR);
2013 /* Disable Interrupts */
2014 Data = 0x00;
2015 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2016
2017 Data = 0x00;
2018 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2019
2020 Data = 0xcf;
2021 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2022
2023 /* Send the updated LCR value to the mos7840 */
2024 Data = mos7840_port->shadowLCR;
2025
2026 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2027
2028 Data = 0x00b;
2029 mos7840_port->shadowMCR = Data;
2030 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2031 Data = 0x00b;
2032 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2033
2034 /* set up the MCR register and send it to the mos7840 */
2035
2036 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 2037 if (cflag & CBAUD)
3f542974 2038 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 2039
880af9db 2040 if (cflag & CRTSCTS)
3f542974 2041 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 2042 else
3f542974 2043 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 2044
2045 Data = mos7840_port->shadowMCR;
2046 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2047
2048 /* Determine divisor based on baud rate */
2049 baud = tty_get_baud_rate(tty);
2050
2051 if (!baud) {
2052 /* pick a default, any default... */
84fe6e79 2053 dbg("%s", "Picked default baud...");
3f542974
PS		 2054 baud = 9600;
2055 }
2056
441b62c1 2057 dbg("%s - baud rate = %d", __func__, baud);
3f542974
PS		 2058 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2059
2060 /* Enable Interrupts */
2061 Data = 0x0c;
2062 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2063
50de36f7 2064 if (mos7840_port->read_urb_busy == false) {
3f542974 2065 mos7840_port->read_urb->dev = serial->dev;
50de36f7 2066 mos7840_port->read_urb_busy = true;
3f542974 2067 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
3f542974 2068 if (status) {
50de36f7 2069 dbg("usb_submit_urb(read bulk) failed, status = %d",
3f542974 2070 status);
50de36f7 2071 mos7840_port->read_urb_busy = false;
3f542974
PS		 2072 }
2073 }
2074 wake_up(&mos7840_port->delta_msr_wait);
2075 mos7840_port->delta_msr_cond = 1;
84fe6e79 2076 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
3f542974
PS		 2077 mos7840_port->shadowLCR);
2078
2079 return;
2080}
2081
2082/*****************************************************************************
2083 * mos7840_set_termios
2084 * this function is called by the tty driver when it wants to change
2085 * the termios structure
2086 *****************************************************************************/
2087
95da310e
AC		 2088static void mos7840_set_termios(struct tty_struct *tty,
2089 struct usb_serial_port *port,
606d099c 2090 struct ktermios *old_termios)
3f542974
PS		 2091{
2092 int status;
2093 unsigned int cflag;
2094 struct usb_serial *serial;
2095 struct moschip_port *mos7840_port;
84fe6e79 2096 dbg("mos7840_set_termios: START");
441b62c1 2097 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 2098 dbg("%s", "Invalid port");
3f542974
PS		 2099 return;
2100 }
2101
2102 serial = port->serial;
2103
441b62c1 2104 if (mos7840_serial_paranoia_check(serial, __func__)) {
84fe6e79 2105 dbg("%s", "Invalid Serial");
3f542974
PS		 2106 return;
2107 }
2108
2109 mos7840_port = mos7840_get_port_private(port);
2110
2111 if (mos7840_port == NULL)
2112 return;
2113
3f542974 2114 if (!mos7840_port->open) {
441b62c1 2115 dbg("%s - port not opened", __func__);
3f542974
PS		 2116 return;
2117 }
2118
84fe6e79 2119 dbg("%s", "setting termios - ");
3f542974
PS		 2120
2121 cflag = tty->termios->c_cflag;
2122
441b62c1 2123 dbg("%s - clfag %08x iflag %08x", __func__,
3f542974 2124 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
441b62c1 2125 dbg("%s - old clfag %08x old iflag %08x", __func__,
3d3ddce5 2126 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
441b62c1 2127 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 2128
2129 /* change the port settings to the new ones specified */
2130
95da310e 2131 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2132
2133 if (!mos7840_port->read_urb) {
84fe6e79 2134 dbg("%s", "URB KILLED !!!!!");
3f542974
PS		 2135 return;
2136 }
2137
50de36f7 2138 if (mos7840_port->read_urb_busy == false) {
3f542974 2139 mos7840_port->read_urb->dev = serial->dev;
50de36f7 2140 mos7840_port->read_urb_busy = true;
3f542974
PS		 2141 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2142 if (status) {
50de36f7 2143 dbg("usb_submit_urb(read bulk) failed, status = %d",
3f542974 2144 status);
50de36f7 2145 mos7840_port->read_urb_busy = false;
3f542974
PS		 2146 }
2147 }
2148 return;
2149}
2150
2151/*****************************************************************************
2152 * mos7840_get_lsr_info - get line status register info
2153 *
2154 * Purpose: Let user call ioctl() to get info when the UART physically
2155 * is emptied. On bus types like RS485, the transmitter must
2156 * release the bus after transmitting. This must be done when
2157 * the transmit shift register is empty, not be done when the
2158 * transmit holding register is empty. This functionality
2159 * allows an RS485 driver to be written in user space.
2160 *****************************************************************************/
2161
95da310e 2162static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2163 unsigned int __user *value)
3f542974
PS		 2164{
2165 int count;
2166 unsigned int result = 0;
2167
95da310e 2168 count = mos7840_chars_in_buffer(tty);
3f542974 2169 if (count == 0) {
441b62c1 2170 dbg("%s -- Empty", __func__);
3f542974
PS		 2171 result = TIOCSER_TEMT;
2172 }
2173
2174 if (copy_to_user(value, &result, sizeof(int)))
2175 return -EFAULT;
2176 return 0;
2177}
2178
3f542974
PS		 2179/*****************************************************************************
2180 * mos7840_get_serial_info
2181 * function to get information about serial port
2182 *****************************************************************************/
2183
2184static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2185 struct serial_struct __user *retinfo)
3f542974
PS		 2186{
2187 struct serial_struct tmp;
2188
2189 if (mos7840_port == NULL)
2190 return -1;
2191
2192 if (!retinfo)
2193 return -EFAULT;
2194
2195 memset(&tmp, 0, sizeof(tmp));
2196
2197 tmp.type = PORT_16550A;
2198 tmp.line = mos7840_port->port->serial->minor;
2199 tmp.port = mos7840_port->port->number;
2200 tmp.irq = 0;
2201 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2202 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2203 tmp.baud_base = 9600;
2204 tmp.close_delay = 5 * HZ;
2205 tmp.closing_wait = 30 * HZ;
2206
2207 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2208 return -EFAULT;
2209 return 0;
2210}
2211
2212/*****************************************************************************
2213 * SerialIoctl
2214 * this function handles any ioctl calls to the driver
2215 *****************************************************************************/
2216
95da310e 2217static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
3f542974
PS		 2218 unsigned int cmd, unsigned long arg)
2219{
95da310e 2220 struct usb_serial_port *port = tty->driver_data;
97c4965d 2221 void __user *argp = (void __user *)arg;
3f542974 2222 struct moschip_port *mos7840_port;
3f542974
PS		 2223
2224 struct async_icount cnow;
2225 struct async_icount cprev;
2226 struct serial_icounter_struct icount;
3f542974 2227
441b62c1 2228 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 2229 dbg("%s", "Invalid port");
3f542974
PS		 2230 return -1;
2231 }
2232
2233 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2234
2235 if (mos7840_port == NULL)
2236 return -1;
2237
441b62c1 2238 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
3f542974
PS		 2239
2240 switch (cmd) {
2241 /* return number of bytes available */
2242
3f542974 2243 case TIOCSERGETLSR:
441b62c1 2244 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
95da310e 2245 return mos7840_get_lsr_info(tty, argp);
3f542974
PS		 2246 return 0;
2247
3f542974 2248 case TIOCGSERIAL:
441b62c1 2249 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
97c4965d 2250 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2251
2252 case TIOCSSERIAL:
441b62c1 2253 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
3f542974
PS		 2254 break;
2255
2256 case TIOCMIWAIT:
441b62c1 2257 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
3f542974
PS		 2258 cprev = mos7840_port->icount;
2259 while (1) {
880af9db 2260 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974
PS		 2261 mos7840_port->delta_msr_cond = 0;
2262 wait_event_interruptible(mos7840_port->delta_msr_wait,
2263 (mos7840_port->
2264 delta_msr_cond == 1));
2265
2266 /* see if a signal did it */
2267 if (signal_pending(current))
2268 return -ERESTARTSYS;
2269 cnow = mos7840_port->icount;
0de9a702 2270 smp_rmb();
3f542974
PS		 2271 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2272 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2273 return -EIO; /* no change => error */
2274 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2275 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2276 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2277 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2278 return 0;
2279 }
2280 cprev = cnow;
2281 }
2282 /* NOTREACHED */
2283 break;
2284
2285 case TIOCGICOUNT:
2286 cnow = mos7840_port->icount;
0de9a702 2287 smp_rmb();
a0846f18
DR		 2288
2289 memset(&icount, 0, sizeof(struct serial_icounter_struct));
2290
3f542974
PS		 2291 icount.cts = cnow.cts;
2292 icount.dsr = cnow.dsr;
2293 icount.rng = cnow.rng;
2294 icount.dcd = cnow.dcd;
2295 icount.rx = cnow.rx;
2296 icount.tx = cnow.tx;
2297 icount.frame = cnow.frame;
2298 icount.overrun = cnow.overrun;
2299 icount.parity = cnow.parity;
2300 icount.brk = cnow.brk;
2301 icount.buf_overrun = cnow.buf_overrun;
2302
441b62c1 2303 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
3f542974 2304 port->number, icount.rx, icount.tx);
97c4965d 2305 if (copy_to_user(argp, &icount, sizeof(icount)))
3f542974
PS		 2306 return -EFAULT;
2307 return 0;
3f542974
PS		 2308 default:
2309 break;
2310 }
3f542974
PS		 2311 return -ENOIOCTLCMD;
2312}
2313
2314static int mos7840_calc_num_ports(struct usb_serial *serial)
2315{
0de9a702 2316 int mos7840_num_ports = 0;
3f542974 2317
84fe6e79
TC		 2318 dbg("numberofendpoints: cur %d, alt %d",
2319 (int)serial->interface->cur_altsetting->desc.bNumEndpoints,
3f542974
PS		 2320 (int)serial->interface->altsetting->desc.bNumEndpoints);
2321 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
0de9a702 2322 mos7840_num_ports = serial->num_ports = 2;
3f542974 2323 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
0de9a702
ON		 2324 serial->num_bulk_in = 4;
2325 serial->num_bulk_out = 4;
2326 mos7840_num_ports = serial->num_ports = 4;
3f542974 2327 }
84fe6e79 2328 dbg ("mos7840_num_ports = %d", mos7840_num_ports);
3f542974
PS		 2329 return mos7840_num_ports;
2330}
2331
2332/****************************************************************************
2333 * mos7840_startup
2334 ****************************************************************************/
2335
2336static int mos7840_startup(struct usb_serial *serial)
2337{
2338 struct moschip_port *mos7840_port;
2339 struct usb_device *dev;
2340 int i, status;
2341
2342 __u16 Data;
84fe6e79 2343 dbg("%s", "mos7840_startup :Entering..........");
3f542974
PS		 2344
2345 if (!serial) {
84fe6e79 2346 dbg("%s", "Invalid Handler");
3f542974
PS		 2347 return -1;
2348 }
2349
2350 dev = serial->dev;
2351
84fe6e79
TC		 2352 dbg("%s", "Entering...");
2353 dbg ("mos7840_startup: serial = %p", serial);
3f542974
PS		 2354
2355 /* we set up the pointers to the endpoints in the mos7840_open *
2356 * function, as the structures aren't created yet. */
2357
2358 /* set up port private structures */
2359 for (i = 0; i < serial->num_ports; ++i) {
84fe6e79 2360 dbg ("mos7840_startup: configuring port %d............", i);
7ac9da10 2361 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
3f542974 2362 if (mos7840_port == NULL) {
194343d9 2363 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
0de9a702
ON		 2364 status = -ENOMEM;
2365 i--; /* don't follow NULL pointer cleaning up */
2366 goto error;
3f542974 2367 }
3f542974 2368
880af9db
AC		 2369 /* Initialize all port interrupt end point to port 0 int
2370 * endpoint. Our device has only one interrupt end point
2371 * common to all port */
3f542974
PS		 2372
2373 mos7840_port->port = serial->port[i];
2374 mos7840_set_port_private(serial->port[i], mos7840_port);
0de9a702 2375 spin_lock_init(&mos7840_port->pool_lock);
3f542974 2376
37768adf
TC		 2377 /* minor is not initialised until later by
2378 * usb-serial.c:get_free_serial() and cannot therefore be used
2379 * to index device instances */
2380 mos7840_port->port_num = i + 1;
2381 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2382 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2383 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2384 dbg ("serial->minor = %d", serial->minor);
3f542974
PS		 2385
2386 if (mos7840_port->port_num == 1) {
2387 mos7840_port->SpRegOffset = 0x0;
2388 mos7840_port->ControlRegOffset = 0x1;
2389 mos7840_port->DcrRegOffset = 0x4;
2390 } else if ((mos7840_port->port_num == 2)
0de9a702 2391 && (serial->num_ports == 4)) {
3f542974
PS		 2392 mos7840_port->SpRegOffset = 0x8;
2393 mos7840_port->ControlRegOffset = 0x9;
2394 mos7840_port->DcrRegOffset = 0x16;
2395 } else if ((mos7840_port->port_num == 2)
0de9a702 2396 && (serial->num_ports == 2)) {
3f542974
PS		 2397 mos7840_port->SpRegOffset = 0xa;
2398 mos7840_port->ControlRegOffset = 0xb;
2399 mos7840_port->DcrRegOffset = 0x19;
2400 } else if ((mos7840_port->port_num == 3)
0de9a702 2401 && (serial->num_ports == 4)) {
3f542974
PS		 2402 mos7840_port->SpRegOffset = 0xa;
2403 mos7840_port->ControlRegOffset = 0xb;
2404 mos7840_port->DcrRegOffset = 0x19;
2405 } else if ((mos7840_port->port_num == 4)
0de9a702 2406 && (serial->num_ports == 4)) {
3f542974
PS		 2407 mos7840_port->SpRegOffset = 0xc;
2408 mos7840_port->ControlRegOffset = 0xd;
2409 mos7840_port->DcrRegOffset = 0x1c;
2410 }
2411 mos7840_dump_serial_port(mos7840_port);
3f542974
PS		 2412 mos7840_set_port_private(serial->port[i], mos7840_port);
2413
880af9db
AC		 2414 /* enable rx_disable bit in control register */
2415 status = mos7840_get_reg_sync(serial->port[i],
2416 mos7840_port->ControlRegOffset, &Data);
3f542974 2417 if (status < 0) {
84fe6e79 2418 dbg("Reading ControlReg failed status-0x%x", status);
3f542974
PS		 2419 break;
2420 } else
84fe6e79 2421 dbg("ControlReg Reading success val is %x, status%d",
3f542974 2422 Data, status);
880af9db
AC		 2423 Data |= 0x08; /* setting driver done bit */
2424 Data |= 0x04; /* sp1_bit to have cts change reflect in
2425 modem status reg */
3f542974 2426
880af9db
AC		 2427 /* Data |= 0x20; //rx_disable bit */
2428 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2429 mos7840_port->ControlRegOffset, Data);
2430 if (status < 0) {
84fe6e79 2431 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
3f542974
PS		 2432 break;
2433 } else
84fe6e79 2434 dbg("ControlReg Writing success(rx_disable) status%d",
3f542974
PS		 2435 status);
2436
880af9db
AC		 2437 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2438 and 0x24 in DCR3 */
3f542974 2439 Data = 0x01;
880af9db
AC		 2440 status = mos7840_set_reg_sync(serial->port[i],
2441 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
3f542974 2442 if (status < 0) {
84fe6e79 2443 dbg("Writing DCR0 failed status-0x%x", status);
3f542974
PS		 2444 break;
2445 } else
84fe6e79 2446 dbg("DCR0 Writing success status%d", status);
3f542974
PS		 2447
2448 Data = 0x05;
880af9db
AC		 2449 status = mos7840_set_reg_sync(serial->port[i],
2450 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
3f542974 2451 if (status < 0) {
84fe6e79 2452 dbg("Writing DCR1 failed status-0x%x", status);
3f542974
PS		 2453 break;
2454 } else
84fe6e79 2455 dbg("DCR1 Writing success status%d", status);
3f542974
PS		 2456
2457 Data = 0x24;
880af9db
AC		 2458 status = mos7840_set_reg_sync(serial->port[i],
2459 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
3f542974 2460 if (status < 0) {
84fe6e79 2461 dbg("Writing DCR2 failed status-0x%x", status);
3f542974
PS		 2462 break;
2463 } else
84fe6e79 2464 dbg("DCR2 Writing success status%d", status);
3f542974 2465
880af9db 2466 /* write values in clkstart0x0 and clkmulti 0x20 */
3f542974 2467 Data = 0x0;
880af9db 2468 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2469 CLK_START_VALUE_REGISTER, Data);
2470 if (status < 0) {
84fe6e79 2471 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
3f542974
PS		 2472 break;
2473 } else
84fe6e79 2474 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
3f542974
PS		 2475
2476 Data = 0x20;
880af9db
AC		 2477 status = mos7840_set_reg_sync(serial->port[i],
2478 CLK_MULTI_REGISTER, Data);
3f542974 2479 if (status < 0) {
84fe6e79 2480 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
3f542974 2481 status);
0de9a702 2482 goto error;
3f542974 2483 } else
84fe6e79 2484 dbg("CLK_MULTI_REGISTER Writing success status%d",
3f542974
PS		 2485 status);
2486
880af9db 2487 /* write value 0x0 to scratchpad register */
3f542974 2488 Data = 0x00;
880af9db
AC		 2489 status = mos7840_set_uart_reg(serial->port[i],
2490 SCRATCH_PAD_REGISTER, Data);
3f542974 2491 if (status < 0) {
84fe6e79 2492 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
3f542974
PS		 2493 status);
2494 break;
2495 } else
84fe6e79 2496 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
3f542974
PS		 2497 status);
2498
880af9db 2499 /* Zero Length flag register */
3f542974 2500 if ((mos7840_port->port_num != 1)
0de9a702 2501 && (serial->num_ports == 2)) {
3f542974
PS		 2502
2503 Data = 0xff;
3f542974 2504 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2505 (__u16) (ZLP_REG1 +
2506 ((__u16)mos7840_port->port_num)), Data);
84fe6e79 2507 dbg("ZLIP offset %x",
3f542974 2508 (__u16) (ZLP_REG1 +
880af9db 2509 ((__u16) mos7840_port->port_num)));
3f542974 2510 if (status < 0) {
84fe6e79 2511 dbg("Writing ZLP_REG%d failed status-0x%x",
3f542974
PS		 2512 i + 2, status);
2513 break;
2514 } else
84fe6e79 2515 dbg("ZLP_REG%d Writing success status%d",
3f542974
PS		 2516 i + 2, status);
2517 } else {
2518 Data = 0xff;
3f542974 2519 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2520 (__u16) (ZLP_REG1 +
2521 ((__u16)mos7840_port->port_num) - 0x1), Data);
84fe6e79 2522 dbg("ZLIP offset %x",
3f542974
PS		 2523 (__u16) (ZLP_REG1 +
2524 ((__u16) mos7840_port->port_num) - 0x1));
2525 if (status < 0) {
84fe6e79 2526 dbg("Writing ZLP_REG%d failed status-0x%x",
3f542974
PS		 2527 i + 1, status);
2528 break;
2529 } else
84fe6e79 2530 dbg("ZLP_REG%d Writing success status%d",
3f542974
PS		 2531 i + 1, status);
2532
2533 }
0de9a702 2534 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974 2535 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
880af9db
AC		 2536 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2537 GFP_KERNEL);
2538 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2539 !mos7840_port->dr) {
0de9a702
ON		 2540 status = -ENOMEM;
2541 goto error;
2542 }
3f542974 2543 }
84fe6e79 2544 dbg ("mos7840_startup: all ports configured...........");
3f542974 2545
880af9db 2546 /* Zero Length flag enable */
3f542974 2547 Data = 0x0f;
3f542974
PS		 2548 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2549 if (status < 0) {
84fe6e79 2550 dbg("Writing ZLP_REG5 failed status-0x%x", status);
7ced46c3 2551 goto error;
3f542974 2552 } else
84fe6e79 2553 dbg("ZLP_REG5 Writing success status%d", status);
3f542974
PS		 2554
2555 /* setting configuration feature to one */
2556 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
97c4965d 2557 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
3f542974 2558 return 0;
0de9a702
ON		 2559error:
2560 for (/* nothing */; i >= 0; i--) {
2561 mos7840_port = mos7840_get_port_private(serial->port[i]);
2562
2563 kfree(mos7840_port->dr);
2564 kfree(mos7840_port->ctrl_buf);
2565 usb_free_urb(mos7840_port->control_urb);
2566 kfree(mos7840_port);
2567 serial->port[i] = NULL;
2568 }
2569 return status;
3f542974
PS		 2570}
2571
2572/****************************************************************************
f9c99bb8 2573 * mos7840_disconnect
3f542974
PS		 2574 * This function is called whenever the device is removed from the usb bus.
2575 ****************************************************************************/
2576
f9c99bb8 2577static void mos7840_disconnect(struct usb_serial *serial)
3f542974
PS		 2578{
2579 int i;
0de9a702 2580 unsigned long flags;
3f542974 2581 struct moschip_port *mos7840_port;
f9c99bb8 2582 dbg("%s", " disconnect :entering..........");
3f542974
PS		 2583
2584 if (!serial) {
84fe6e79 2585 dbg("%s", "Invalid Handler");
3f542974
PS		 2586 return;
2587 }
2588
880af9db 2589 /* check for the ports to be closed,close the ports and disconnect */
3f542974
PS		 2590
2591 /* free private structure allocated for serial port *
2592 * stop reads and writes on all ports */
2593
2594 for (i = 0; i < serial->num_ports; ++i) {
2595 mos7840_port = mos7840_get_port_private(serial->port[i]);
37768adf
TC		 2596 dbg ("mos7840_port %d = %p", i, mos7840_port);
2597 if (mos7840_port) {
2598 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2599 mos7840_port->zombie = 1;
2600 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
2601 usb_kill_urb(mos7840_port->control_urb);
f9c99bb8
AS		 2602 }
2603 }
2604
2605 dbg("%s", "Thank u :: ");
2606
2607}
2608
2609/****************************************************************************
2610 * mos7840_release
2611 * This function is called when the usb_serial structure is freed.
2612 ****************************************************************************/
2613
2614static void mos7840_release(struct usb_serial *serial)
2615{
2616 int i;
2617 struct moschip_port *mos7840_port;
2618 dbg("%s", " release :entering..........");
2619
2620 if (!serial) {
2621 dbg("%s", "Invalid Handler");
2622 return;
2623 }
2624
2625 /* check for the ports to be closed,close the ports and disconnect */
2626
2627 /* free private structure allocated for serial port *
2628 * stop reads and writes on all ports */
2629
2630 for (i = 0; i < serial->num_ports; ++i) {
2631 mos7840_port = mos7840_get_port_private(serial->port[i]);
2632 dbg("mos7840_port %d = %p", i, mos7840_port);
2633 if (mos7840_port) {
37768adf
TC		 2634 kfree(mos7840_port->ctrl_buf);
2635 kfree(mos7840_port->dr);
2636 kfree(mos7840_port);
2637 }
3f542974
PS		 2638 }
2639
84fe6e79 2640 dbg("%s", "Thank u :: ");
3f542974
PS		 2641
2642}
2643
d9b1b787
JH		 2644static struct usb_driver io_driver = {
2645 .name = "mos7840",
2646 .probe = usb_serial_probe,
2647 .disconnect = usb_serial_disconnect,
2648 .id_table = moschip_id_table_combined,
2649 .no_dynamic_id = 1,
2650};
2651
3f542974
PS		 2652static struct usb_serial_driver moschip7840_4port_device = {
2653 .driver = {
2654 .owner = THIS_MODULE,
2655 .name = "mos7840",
2656 },
2657 .description = DRIVER_DESC,
d9b1b787 2658 .usb_driver = &io_driver,
3f542974 2659 .id_table = moschip_port_id_table,
3f542974 2660 .num_ports = 4,
3f542974
PS		 2661 .open = mos7840_open,
2662 .close = mos7840_close,
2663 .write = mos7840_write,
2664 .write_room = mos7840_write_room,
2665 .chars_in_buffer = mos7840_chars_in_buffer,
2666 .throttle = mos7840_throttle,
2667 .unthrottle = mos7840_unthrottle,
2668 .calc_num_ports = mos7840_calc_num_ports,
2669#ifdef MCSSerialProbe
2670 .probe = mos7840_serial_probe,
2671#endif
2672 .ioctl = mos7840_ioctl,
2673 .set_termios = mos7840_set_termios,
2674 .break_ctl = mos7840_break,
2675 .tiocmget = mos7840_tiocmget,
2676 .tiocmset = mos7840_tiocmset,
2677 .attach = mos7840_startup,
f9c99bb8
AS		 2678 .disconnect = mos7840_disconnect,
2679 .release = mos7840_release,
3f542974
PS		 2680 .read_bulk_callback = mos7840_bulk_in_callback,
2681 .read_int_callback = mos7840_interrupt_callback,
2682};
2683
3f542974
PS		 2684/****************************************************************************
2685 * moschip7840_init
2686 * This is called by the module subsystem, or on startup to initialize us
2687 ****************************************************************************/
2688static int __init moschip7840_init(void)
2689{
2690 int retval;
2691
84fe6e79 2692 dbg("%s", " mos7840_init :entering..........");
3f542974
PS		 2693
2694 /* Register with the usb serial */
2695 retval = usb_serial_register(&moschip7840_4port_device);
2696
2697 if (retval)
2698 goto failed_port_device_register;
2699
84fe6e79 2700 dbg("%s", "Entering...");
c197a8db
GKH		 2701 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2702 DRIVER_DESC "\n");
3f542974
PS		 2703
2704 /* Register with the usb */
2705 retval = usb_register(&io_driver);
3f542974 2706 if (retval == 0) {
84fe6e79 2707 dbg("%s", "Leaving...");
3f542974
PS		 2708 return 0;
2709 }
3f542974 2710 usb_serial_deregister(&moschip7840_4port_device);
880af9db 2711failed_port_device_register:
3f542974
PS		 2712 return retval;
2713}
2714
2715/****************************************************************************
2716 * moschip7840_exit
2717 * Called when the driver is about to be unloaded.
2718 ****************************************************************************/
2719static void __exit moschip7840_exit(void)
2720{
2721
84fe6e79 2722 dbg("%s", " mos7840_exit :entering..........");
3f542974
PS		 2723
2724 usb_deregister(&io_driver);
2725
2726 usb_serial_deregister(&moschip7840_4port_device);
2727
84fe6e79 2728 dbg("%s", "Entering...");
3f542974
PS		 2729}
2730
2731module_init(moschip7840_init);
2732module_exit(moschip7840_exit);
2733
2734/* Module information */
2735MODULE_DESCRIPTION(DRIVER_DESC);
2736MODULE_LICENSE("GPL");
2737
2738module_param(debug, bool, S_IRUGO | S_IWUSR);
2739MODULE_PARM_DESC(debug, "Debug enabled or not");
Clone of davem's net-next-2.6 tree