projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
tiocmget: kill off the passing of the struct file
[deliverable/linux.git] / drivers / usb / serial / mos7840.c
CommitLineData
3f542974
PS		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 *
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
18 *
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
22 *
23 */
24
25#include <linux/kernel.h>
26#include <linux/errno.h>
27#include <linux/init.h>
28#include <linux/slab.h>
29#include <linux/tty.h>
30#include <linux/tty_driver.h>
31#include <linux/tty_flip.h>
32#include <linux/module.h>
33#include <linux/serial.h>
34#include <linux/usb.h>
35#include <linux/usb/serial.h>
880af9db 36#include <linux/uaccess.h>
3f542974
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);
3f542974
PS		 1370}
1371
1372/*****************************************************************************
1373 * mos7840_write_room
1374 * this function is called by the tty driver when it wants to know how many
1375 * bytes of data we can accept for a specific port.
1376 * If successful, we return the amount of room that we have for this port
1377 * Otherwise we return a negative error number.
1378 *****************************************************************************/
1379
95da310e 1380static int mos7840_write_room(struct tty_struct *tty)
3f542974 1381{
95da310e 1382 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1383 int i;
1384 int room = 0;
0de9a702 1385 unsigned long flags;
3f542974
PS		 1386 struct moschip_port *mos7840_port;
1387
84fe6e79 1388 dbg("%s", " mos7840_write_room:entering ...........");
3f542974 1389
441b62c1 1390 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79
TC		 1391 dbg("%s", "Invalid port");
1392 dbg("%s", " mos7840_write_room:leaving ...........");
3f542974
PS		 1393 return -1;
1394 }
1395
1396 mos7840_port = mos7840_get_port_private(port);
1397 if (mos7840_port == NULL) {
84fe6e79 1398 dbg("%s", "mos7840_break:leaving ...........");
3f542974
PS		 1399 return -1;
1400 }
1401
0de9a702 1402 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1403 for (i = 0; i < NUM_URBS; ++i) {
880af9db 1404 if (!mos7840_port->busy[i])
3f542974 1405 room += URB_TRANSFER_BUFFER_SIZE;
3f542974 1406 }
0de9a702 1407 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974 1408
0de9a702 1409 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
441b62c1 1410 dbg("%s - returns %d", __func__, room);
0de9a702 1411 return room;
3f542974
PS		 1412
1413}
1414
1415/*****************************************************************************
1416 * mos7840_write
1417 * this function is called by the tty driver when data should be written to
1418 * the port.
1419 * If successful, we return the number of bytes written, otherwise we
1420 * return a negative error number.
1421 *****************************************************************************/
1422
95da310e 1423static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
3f542974
PS		 1424 const unsigned char *data, int count)
1425{
1426 int status;
1427 int i;
1428 int bytes_sent = 0;
1429 int transfer_size;
0de9a702 1430 unsigned long flags;
3f542974
PS		 1431
1432 struct moschip_port *mos7840_port;
1433 struct usb_serial *serial;
1434 struct urb *urb;
880af9db 1435 /* __u16 Data; */
3f542974
PS		 1436 const unsigned char *current_position = data;
1437 unsigned char *data1;
84fe6e79
TC		 1438 dbg("%s", "entering ...........");
1439 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
880af9db 1440 mos7840_port->shadowLCR); */
3f542974
PS		 1441
1442#ifdef NOTMOS7840
1443 Data = 0x00;
3f542974
PS		 1444 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1445 mos7840_port->shadowLCR = Data;
84fe6e79
TC		 1446 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
1447 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
3f542974
PS		 1448 mos7840_port->shadowLCR);
1449
880af9db
AC		 1450 /* Data = 0x03; */
1451 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1452 /* mos7840_port->shadowLCR=Data;//Need to add later */
3f542974 1453
880af9db 1454 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
3f542974
PS		 1455 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1456
880af9db
AC		 1457 /* Data = 0x0c; */
1458 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
3f542974 1459 Data = 0x00;
3f542974 1460 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
84fe6e79 1461 dbg("mos7840_write:DLL value is %x", Data);
3f542974
PS		 1462
1463 Data = 0x0;
3f542974 1464 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
84fe6e79 1465 dbg("mos7840_write:DLM value is %x", Data);
3f542974
PS		 1466
1467 Data = Data & ~SERIAL_LCR_DLAB;
84fe6e79 1468 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
3f542974 1469 mos7840_port->shadowLCR);
3f542974
PS		 1470 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1471#endif
1472
441b62c1 1473 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1474 dbg("%s", "Port Paranoia failed");
3f542974
PS		 1475 return -1;
1476 }
1477
1478 serial = port->serial;
441b62c1 1479 if (mos7840_serial_paranoia_check(serial, __func__)) {
84fe6e79 1480 dbg("%s", "Serial Paranoia failed");
3f542974
PS		 1481 return -1;
1482 }
1483
1484 mos7840_port = mos7840_get_port_private(port);
1485 if (mos7840_port == NULL) {
84fe6e79 1486 dbg("%s", "mos7840_port is NULL");
3f542974
PS		 1487 return -1;
1488 }
1489
1490 /* try to find a free urb in the list */
1491 urb = NULL;
1492
0de9a702 1493 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
3f542974 1494 for (i = 0; i < NUM_URBS; ++i) {
0de9a702
ON		 1495 if (!mos7840_port->busy[i]) {
1496 mos7840_port->busy[i] = 1;
3f542974 1497 urb = mos7840_port->write_urb_pool[i];
84fe6e79 1498 dbg("URB:%d", i);
3f542974
PS		 1499 break;
1500 }
1501 }
0de9a702 1502 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
3f542974
PS		 1503
1504 if (urb == NULL) {
441b62c1 1505 dbg("%s - no more free urbs", __func__);
3f542974
PS		 1506 goto exit;
1507 }
1508
1509 if (urb->transfer_buffer == NULL) {
1510 urb->transfer_buffer =
1511 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1512
1513 if (urb->transfer_buffer == NULL) {
194343d9
GKH		 1514 dev_err(&port->dev, "%s no more kernel memory...\n",
1515 __func__);
3f542974
PS		 1516 goto exit;
1517 }
1518 }
1519 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1520
97c4965d 1521 memcpy(urb->transfer_buffer, current_position, transfer_size);
3f542974
PS		 1522
1523 /* fill urb with data and submit */
1524 usb_fill_bulk_urb(urb,
1525 serial->dev,
1526 usb_sndbulkpipe(serial->dev,
1527 port->bulk_out_endpointAddress),
1528 urb->transfer_buffer,
1529 transfer_size,
1530 mos7840_bulk_out_data_callback, mos7840_port);
1531
1532 data1 = urb->transfer_buffer;
84fe6e79 1533 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
3f542974
PS		 1534
1535 /* send it down the pipe */
1536 status = usb_submit_urb(urb, GFP_ATOMIC);
1537
1538 if (status) {
0de9a702 1539 mos7840_port->busy[i] = 0;
194343d9
GKH		 1540 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1541 "with status = %d\n", __func__, status);
3f542974
PS		 1542 bytes_sent = status;
1543 goto exit;
1544 }
1545 bytes_sent = transfer_size;
1546 mos7840_port->icount.tx += transfer_size;
0de9a702 1547 smp_wmb();
84fe6e79 1548 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
95da310e 1549exit:
3f542974
PS		 1550 return bytes_sent;
1551
1552}
1553
1554/*****************************************************************************
1555 * mos7840_throttle
1556 * this function is called by the tty driver when it wants to stop the data
1557 * being read from the port.
1558 *****************************************************************************/
1559
95da310e 1560static void mos7840_throttle(struct tty_struct *tty)
3f542974 1561{
95da310e 1562 struct usb_serial_port *port = tty->driver_data;
3f542974 1563 struct moschip_port *mos7840_port;
3f542974
PS		 1564 int status;
1565
441b62c1 1566 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1567 dbg("%s", "Invalid port");
3f542974
PS		 1568 return;
1569 }
1570
84fe6e79 1571 dbg("- port %d", port->number);
3f542974
PS		 1572
1573 mos7840_port = mos7840_get_port_private(port);
1574
1575 if (mos7840_port == NULL)
1576 return;
1577
1578 if (!mos7840_port->open) {
84fe6e79 1579 dbg("%s", "port not opened");
3f542974
PS		 1580 return;
1581 }
1582
84fe6e79 1583 dbg("%s", "Entering ..........");
3f542974 1584
3f542974
PS		 1585 /* if we are implementing XON/XOFF, send the stop character */
1586 if (I_IXOFF(tty)) {
1587 unsigned char stop_char = STOP_CHAR(tty);
95da310e
AC		 1588 status = mos7840_write(tty, port, &stop_char, 1);
1589 if (status <= 0)
3f542974 1590 return;
3f542974 1591 }
3f542974
PS		 1592 /* if we are implementing RTS/CTS, toggle that line */
1593 if (tty->termios->c_cflag & CRTSCTS) {
1594 mos7840_port->shadowMCR &= ~MCR_RTS;
95da310e 1595 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1596 mos7840_port->shadowMCR);
95da310e 1597 if (status < 0)
3f542974 1598 return;
3f542974 1599 }
3f542974
PS		 1600}
1601
1602/*****************************************************************************
1603 * mos7840_unthrottle
880af9db
AC		 1604 * this function is called by the tty driver when it wants to resume
1605 * the data being read from the port (called after mos7840_throttle is
1606 * called)
3f542974 1607 *****************************************************************************/
95da310e 1608static void mos7840_unthrottle(struct tty_struct *tty)
3f542974 1609{
95da310e 1610 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1611 int status;
1612 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1613
441b62c1 1614 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1615 dbg("%s", "Invalid port");
3f542974
PS		 1616 return;
1617 }
1618
1619 if (mos7840_port == NULL)
1620 return;
1621
1622 if (!mos7840_port->open) {
441b62c1 1623 dbg("%s - port not opened", __func__);
3f542974
PS		 1624 return;
1625 }
1626
84fe6e79 1627 dbg("%s", "Entering ..........");
3f542974 1628
3f542974
PS		 1629 /* if we are implementing XON/XOFF, send the start character */
1630 if (I_IXOFF(tty)) {
1631 unsigned char start_char = START_CHAR(tty);
95da310e
AC		 1632 status = mos7840_write(tty, port, &start_char, 1);
1633 if (status <= 0)
3f542974 1634 return;
3f542974
PS		 1635 }
1636
1637 /* if we are implementing RTS/CTS, toggle that line */
1638 if (tty->termios->c_cflag & CRTSCTS) {
1639 mos7840_port->shadowMCR |= MCR_RTS;
95da310e 1640 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
3f542974 1641 mos7840_port->shadowMCR);
95da310e 1642 if (status < 0)
3f542974 1643 return;
3f542974 1644 }
3f542974
PS		 1645}
1646
60b33c13 1647static int mos7840_tiocmget(struct tty_struct *tty)
3f542974 1648{
95da310e 1649 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1650 struct moschip_port *mos7840_port;
1651 unsigned int result;
1652 __u16 msr;
1653 __u16 mcr;
880af9db 1654 int status;
3f542974
PS		 1655 mos7840_port = mos7840_get_port_private(port);
1656
441b62c1 1657 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1658
1659 if (mos7840_port == NULL)
1660 return -ENODEV;
1661
1662 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1663 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1664 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1665 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1666 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1667 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1668 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1669 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1670 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1671
441b62c1 1672 dbg("%s - 0x%04X", __func__, result);
3f542974
PS		 1673
1674 return result;
1675}
1676
95da310e 1677static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
3f542974
PS		 1678 unsigned int set, unsigned int clear)
1679{
95da310e 1680 struct usb_serial_port *port = tty->driver_data;
3f542974
PS		 1681 struct moschip_port *mos7840_port;
1682 unsigned int mcr;
87521c46 1683 int status;
3f542974 1684
441b62c1 1685 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 1686
1687 mos7840_port = mos7840_get_port_private(port);
1688
1689 if (mos7840_port == NULL)
1690 return -ENODEV;
1691
e2984494 1692 /* FIXME: What locks the port registers ? */
3f542974
PS		 1693 mcr = mos7840_port->shadowMCR;
1694 if (clear & TIOCM_RTS)
1695 mcr &= ~MCR_RTS;
1696 if (clear & TIOCM_DTR)
1697 mcr &= ~MCR_DTR;
1698 if (clear & TIOCM_LOOP)
1699 mcr &= ~MCR_LOOPBACK;
1700
1701 if (set & TIOCM_RTS)
1702 mcr |= MCR_RTS;
1703 if (set & TIOCM_DTR)
1704 mcr |= MCR_DTR;
1705 if (set & TIOCM_LOOP)
1706 mcr |= MCR_LOOPBACK;
1707
1708 mos7840_port->shadowMCR = mcr;
1709
3f542974
PS		 1710 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1711 if (status < 0) {
84fe6e79 1712 dbg("setting MODEM_CONTROL_REGISTER Failed");
87521c46 1713 return status;
3f542974
PS		 1714 }
1715
1716 return 0;
1717}
1718
1719/*****************************************************************************
1720 * mos7840_calc_baud_rate_divisor
1721 * this function calculates the proper baud rate divisor for the specified
1722 * baud rate.
1723 *****************************************************************************/
1724static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
880af9db 1725 __u16 *clk_sel_val)
3f542974
PS		 1726{
1727
441b62c1 1728 dbg("%s - %d", __func__, baudRate);
3f542974
PS		 1729
1730 if (baudRate <= 115200) {
1731 *divisor = 115200 / baudRate;
1732 *clk_sel_val = 0x0;
1733 }
1734 if ((baudRate > 115200) && (baudRate <= 230400)) {
1735 *divisor = 230400 / baudRate;
1736 *clk_sel_val = 0x10;
1737 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1738 *divisor = 403200 / baudRate;
1739 *clk_sel_val = 0x20;
1740 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1741 *divisor = 460800 / baudRate;
1742 *clk_sel_val = 0x30;
1743 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1744 *divisor = 806400 / baudRate;
1745 *clk_sel_val = 0x40;
1746 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1747 *divisor = 921600 / baudRate;
1748 *clk_sel_val = 0x50;
1749 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1750 *divisor = 1572864 / baudRate;
1751 *clk_sel_val = 0x60;
1752 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1753 *divisor = 3145728 / baudRate;
1754 *clk_sel_val = 0x70;
1755 }
1756 return 0;
1757
1758#ifdef NOTMCS7840
1759
1760 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1761 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1762 *divisor = mos7840_divisor_table[i].Divisor;
1763 return 0;
1764 }
1765 }
1766
1767 /* After trying for all the standard baud rates *
1768 * Try calculating the divisor for this baud rate */
1769
1770 if (baudrate > 75 && baudrate < 230400) {
1771 /* get the divisor */
1772 custom = (__u16) (230400L / baudrate);
1773
1774 /* Check for round off */
1775 round1 = (__u16) (2304000L / baudrate);
1776 round = (__u16) (round1 - (custom * 10));
880af9db 1777 if (round > 4)
3f542974 1778 custom++;
3f542974
PS		 1779 *divisor = custom;
1780
84fe6e79 1781 dbg(" Baud %d = %d", baudrate, custom);
3f542974
PS		 1782 return 0;
1783 }
1784
84fe6e79 1785 dbg("%s", " Baud calculation Failed...");
3f542974
PS		 1786 return -1;
1787#endif
1788}
1789
1790/*****************************************************************************
1791 * mos7840_send_cmd_write_baud_rate
1792 * this function sends the proper command to change the baud rate of the
1793 * specified port.
1794 *****************************************************************************/
1795
1796static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1797 int baudRate)
1798{
1799 int divisor = 0;
1800 int status;
1801 __u16 Data;
1802 unsigned char number;
1803 __u16 clk_sel_val;
1804 struct usb_serial_port *port;
1805
1806 if (mos7840_port == NULL)
1807 return -1;
1808
1809 port = (struct usb_serial_port *)mos7840_port->port;
441b62c1 1810 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1811 dbg("%s", "Invalid port");
3f542974
PS		 1812 return -1;
1813 }
1814
441b62c1 1815 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
84fe6e79 1816 dbg("%s", "Invalid Serial");
3f542974
PS		 1817 return -1;
1818 }
1819
84fe6e79 1820 dbg("%s", "Entering ..........");
3f542974
PS		 1821
1822 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1823
441b62c1 1824 dbg("%s - port = %d, baud = %d", __func__,
3f542974 1825 mos7840_port->port->number, baudRate);
880af9db 1826 /* reset clk_uart_sel in spregOffset */
3f542974
PS		 1827 if (baudRate > 115200) {
1828#ifdef HW_flow_control
880af9db
AC		 1829 /* NOTE: need to see the pther register to modify */
1830 /* setting h/w flow control bit to 1 */
3f542974
PS		 1831 Data = 0x2b;
1832 mos7840_port->shadowMCR = Data;
880af9db
AC		 1833 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1834 Data);
3f542974 1835 if (status < 0) {
84fe6e79 1836 dbg("Writing spreg failed in set_serial_baud");
3f542974
PS		 1837 return -1;
1838 }
1839#endif
1840
1841 } else {
1842#ifdef HW_flow_control
880af9db 1843 / *setting h/w flow control bit to 0 */
3f542974
PS		 1844 Data = 0xb;
1845 mos7840_port->shadowMCR = Data;
880af9db
AC		 1846 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1847 Data);
3f542974 1848 if (status < 0) {
84fe6e79 1849 dbg("Writing spreg failed in set_serial_baud");
3f542974
PS		 1850 return -1;
1851 }
1852#endif
1853
1854 }
1855
880af9db 1856 if (1) { /* baudRate <= 115200) */
3f542974
PS		 1857 clk_sel_val = 0x0;
1858 Data = 0x0;
880af9db 1859 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
3f542974 1860 &clk_sel_val);
880af9db
AC		 1861 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1862 &Data);
3f542974 1863 if (status < 0) {
84fe6e79 1864 dbg("reading spreg failed in set_serial_baud");
3f542974
PS		 1865 return -1;
1866 }
1867 Data = (Data & 0x8f) | clk_sel_val;
880af9db
AC		 1868 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1869 Data);
3f542974 1870 if (status < 0) {
84fe6e79 1871 dbg("Writing spreg failed in set_serial_baud");
3f542974
PS		 1872 return -1;
1873 }
1874 /* Calculate the Divisor */
1875
1876 if (status) {
194343d9 1877 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
3f542974
PS		 1878 return status;
1879 }
1880 /* Enable access to divisor latch */
1881 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1882 mos7840_port->shadowLCR = Data;
1883 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1884
1885 /* Write the divisor */
1886 Data = (unsigned char)(divisor & 0xff);
84fe6e79 1887 dbg("set_serial_baud Value to write DLL is %x", Data);
3f542974
PS		 1888 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1889
1890 Data = (unsigned char)((divisor & 0xff00) >> 8);
84fe6e79 1891 dbg("set_serial_baud Value to write DLM is %x", Data);
3f542974
PS		 1892 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1893
1894 /* Disable access to divisor latch */
1895 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1896 mos7840_port->shadowLCR = Data;
1897 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1898
1899 }
3f542974
PS		 1900 return status;
1901}
1902
1903/*****************************************************************************
1904 * mos7840_change_port_settings
1905 * This routine is called to set the UART on the device to match
1906 * the specified new settings.
1907 *****************************************************************************/
1908
95da310e
AC		 1909static void mos7840_change_port_settings(struct tty_struct *tty,
1910 struct moschip_port *mos7840_port, struct ktermios *old_termios)
3f542974 1911{
3f542974
PS		 1912 int baud;
1913 unsigned cflag;
1914 unsigned iflag;
1915 __u8 lData;
1916 __u8 lParity;
1917 __u8 lStop;
1918 int status;
1919 __u16 Data;
1920 struct usb_serial_port *port;
1921 struct usb_serial *serial;
1922
1923 if (mos7840_port == NULL)
1924 return;
1925
1926 port = (struct usb_serial_port *)mos7840_port->port;
1927
441b62c1 1928 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 1929 dbg("%s", "Invalid port");
3f542974
PS		 1930 return;
1931 }
1932
441b62c1 1933 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
84fe6e79 1934 dbg("%s", "Invalid Serial");
3f542974
PS		 1935 return;
1936 }
1937
1938 serial = port->serial;
1939
441b62c1 1940 dbg("%s - port %d", __func__, mos7840_port->port->number);
3f542974
PS		 1941
1942 if (!mos7840_port->open) {
441b62c1 1943 dbg("%s - port not opened", __func__);
3f542974
PS		 1944 return;
1945 }
1946
84fe6e79 1947 dbg("%s", "Entering ..........");
3f542974
PS		 1948
1949 lData = LCR_BITS_8;
1950 lStop = LCR_STOP_1;
1951 lParity = LCR_PAR_NONE;
1952
1953 cflag = tty->termios->c_cflag;
1954 iflag = tty->termios->c_iflag;
1955
1956 /* Change the number of bits */
1957 if (cflag & CSIZE) {
1958 switch (cflag & CSIZE) {
1959 case CS5:
1960 lData = LCR_BITS_5;
1961 break;
1962
1963 case CS6:
1964 lData = LCR_BITS_6;
1965 break;
1966
1967 case CS7:
1968 lData = LCR_BITS_7;
1969 break;
1970 default:
1971 case CS8:
1972 lData = LCR_BITS_8;
1973 break;
1974 }
1975 }
1976 /* Change the Parity bit */
1977 if (cflag & PARENB) {
1978 if (cflag & PARODD) {
1979 lParity = LCR_PAR_ODD;
441b62c1 1980 dbg("%s - parity = odd", __func__);
3f542974
PS		 1981 } else {
1982 lParity = LCR_PAR_EVEN;
441b62c1 1983 dbg("%s - parity = even", __func__);
3f542974
PS		 1984 }
1985
1986 } else {
441b62c1 1987 dbg("%s - parity = none", __func__);
3f542974
PS		 1988 }
1989
880af9db 1990 if (cflag & CMSPAR)
3f542974 1991 lParity = lParity | 0x20;
3f542974
PS		 1992
1993 /* Change the Stop bit */
1994 if (cflag & CSTOPB) {
1995 lStop = LCR_STOP_2;
441b62c1 1996 dbg("%s - stop bits = 2", __func__);
3f542974
PS		 1997 } else {
1998 lStop = LCR_STOP_1;
441b62c1 1999 dbg("%s - stop bits = 1", __func__);
3f542974
PS		 2000 }
2001
2002 /* Update the LCR with the correct value */
2003 mos7840_port->shadowLCR &=
2004 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2005 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2006
84fe6e79 2007 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
3f542974
PS		 2008 mos7840_port->shadowLCR);
2009 /* Disable Interrupts */
2010 Data = 0x00;
2011 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2012
2013 Data = 0x00;
2014 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2015
2016 Data = 0xcf;
2017 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2018
2019 /* Send the updated LCR value to the mos7840 */
2020 Data = mos7840_port->shadowLCR;
2021
2022 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2023
2024 Data = 0x00b;
2025 mos7840_port->shadowMCR = Data;
2026 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2027 Data = 0x00b;
2028 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2029
2030 /* set up the MCR register and send it to the mos7840 */
2031
2032 mos7840_port->shadowMCR = MCR_MASTER_IE;
880af9db 2033 if (cflag & CBAUD)
3f542974 2034 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
3f542974 2035
880af9db 2036 if (cflag & CRTSCTS)
3f542974 2037 mos7840_port->shadowMCR |= (MCR_XON_ANY);
880af9db 2038 else
3f542974 2039 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
3f542974
PS		 2040
2041 Data = mos7840_port->shadowMCR;
2042 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2043
2044 /* Determine divisor based on baud rate */
2045 baud = tty_get_baud_rate(tty);
2046
2047 if (!baud) {
2048 /* pick a default, any default... */
84fe6e79 2049 dbg("%s", "Picked default baud...");
3f542974
PS		 2050 baud = 9600;
2051 }
2052
441b62c1 2053 dbg("%s - baud rate = %d", __func__, baud);
3f542974
PS		 2054 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2055
2056 /* Enable Interrupts */
2057 Data = 0x0c;
2058 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2059
50de36f7 2060 if (mos7840_port->read_urb_busy == false) {
3f542974 2061 mos7840_port->read_urb->dev = serial->dev;
50de36f7 2062 mos7840_port->read_urb_busy = true;
3f542974 2063 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
3f542974 2064 if (status) {
50de36f7 2065 dbg("usb_submit_urb(read bulk) failed, status = %d",
3f542974 2066 status);
50de36f7 2067 mos7840_port->read_urb_busy = false;
3f542974
PS		 2068 }
2069 }
2070 wake_up(&mos7840_port->delta_msr_wait);
2071 mos7840_port->delta_msr_cond = 1;
84fe6e79 2072 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
3f542974 2073 mos7840_port->shadowLCR);
3f542974
PS		 2074}
2075
2076/*****************************************************************************
2077 * mos7840_set_termios
2078 * this function is called by the tty driver when it wants to change
2079 * the termios structure
2080 *****************************************************************************/
2081
95da310e
AC		 2082static void mos7840_set_termios(struct tty_struct *tty,
2083 struct usb_serial_port *port,
606d099c 2084 struct ktermios *old_termios)
3f542974
PS		 2085{
2086 int status;
2087 unsigned int cflag;
2088 struct usb_serial *serial;
2089 struct moschip_port *mos7840_port;
84fe6e79 2090 dbg("mos7840_set_termios: START");
441b62c1 2091 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 2092 dbg("%s", "Invalid port");
3f542974
PS		 2093 return;
2094 }
2095
2096 serial = port->serial;
2097
441b62c1 2098 if (mos7840_serial_paranoia_check(serial, __func__)) {
84fe6e79 2099 dbg("%s", "Invalid Serial");
3f542974
PS		 2100 return;
2101 }
2102
2103 mos7840_port = mos7840_get_port_private(port);
2104
2105 if (mos7840_port == NULL)
2106 return;
2107
3f542974 2108 if (!mos7840_port->open) {
441b62c1 2109 dbg("%s - port not opened", __func__);
3f542974
PS		 2110 return;
2111 }
2112
84fe6e79 2113 dbg("%s", "setting termios - ");
3f542974
PS		 2114
2115 cflag = tty->termios->c_cflag;
2116
441b62c1 2117 dbg("%s - clfag %08x iflag %08x", __func__,
3f542974 2118 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
441b62c1 2119 dbg("%s - old clfag %08x old iflag %08x", __func__,
3d3ddce5 2120 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
441b62c1 2121 dbg("%s - port %d", __func__, port->number);
3f542974
PS		 2122
2123 /* change the port settings to the new ones specified */
2124
95da310e 2125 mos7840_change_port_settings(tty, mos7840_port, old_termios);
3f542974
PS		 2126
2127 if (!mos7840_port->read_urb) {
84fe6e79 2128 dbg("%s", "URB KILLED !!!!!");
3f542974
PS		 2129 return;
2130 }
2131
50de36f7 2132 if (mos7840_port->read_urb_busy == false) {
3f542974 2133 mos7840_port->read_urb->dev = serial->dev;
50de36f7 2134 mos7840_port->read_urb_busy = true;
3f542974
PS		 2135 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2136 if (status) {
50de36f7 2137 dbg("usb_submit_urb(read bulk) failed, status = %d",
3f542974 2138 status);
50de36f7 2139 mos7840_port->read_urb_busy = false;
3f542974
PS		 2140 }
2141 }
3f542974
PS		 2142}
2143
2144/*****************************************************************************
2145 * mos7840_get_lsr_info - get line status register info
2146 *
2147 * Purpose: Let user call ioctl() to get info when the UART physically
2148 * is emptied. On bus types like RS485, the transmitter must
2149 * release the bus after transmitting. This must be done when
2150 * the transmit shift register is empty, not be done when the
2151 * transmit holding register is empty. This functionality
2152 * allows an RS485 driver to be written in user space.
2153 *****************************************************************************/
2154
95da310e 2155static int mos7840_get_lsr_info(struct tty_struct *tty,
97c4965d 2156 unsigned int __user *value)
3f542974
PS		 2157{
2158 int count;
2159 unsigned int result = 0;
2160
95da310e 2161 count = mos7840_chars_in_buffer(tty);
3f542974 2162 if (count == 0) {
441b62c1 2163 dbg("%s -- Empty", __func__);
3f542974
PS		 2164 result = TIOCSER_TEMT;
2165 }
2166
2167 if (copy_to_user(value, &result, sizeof(int)))
2168 return -EFAULT;
2169 return 0;
2170}
2171
3f542974
PS		 2172/*****************************************************************************
2173 * mos7840_get_serial_info
2174 * function to get information about serial port
2175 *****************************************************************************/
2176
2177static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
97c4965d 2178 struct serial_struct __user *retinfo)
3f542974
PS		 2179{
2180 struct serial_struct tmp;
2181
2182 if (mos7840_port == NULL)
2183 return -1;
2184
2185 if (!retinfo)
2186 return -EFAULT;
2187
2188 memset(&tmp, 0, sizeof(tmp));
2189
2190 tmp.type = PORT_16550A;
2191 tmp.line = mos7840_port->port->serial->minor;
2192 tmp.port = mos7840_port->port->number;
2193 tmp.irq = 0;
2194 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2195 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2196 tmp.baud_base = 9600;
2197 tmp.close_delay = 5 * HZ;
2198 tmp.closing_wait = 30 * HZ;
2199
2200 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2201 return -EFAULT;
2202 return 0;
2203}
2204
0bca1b91
AC		 2205static int mos7840_get_icount(struct tty_struct *tty,
2206 struct serial_icounter_struct *icount)
2207{
2208 struct usb_serial_port *port = tty->driver_data;
2209 struct moschip_port *mos7840_port;
2210 struct async_icount cnow;
2211
2212 mos7840_port = mos7840_get_port_private(port);
2213 cnow = mos7840_port->icount;
2214
2215 smp_rmb();
2216 icount->cts = cnow.cts;
2217 icount->dsr = cnow.dsr;
2218 icount->rng = cnow.rng;
2219 icount->dcd = cnow.dcd;
2220 icount->rx = cnow.rx;
2221 icount->tx = cnow.tx;
2222 icount->frame = cnow.frame;
2223 icount->overrun = cnow.overrun;
2224 icount->parity = cnow.parity;
2225 icount->brk = cnow.brk;
2226 icount->buf_overrun = cnow.buf_overrun;
2227
2228 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2229 port->number, icount->rx, icount->tx);
2230 return 0;
2231}
2232
3f542974
PS		 2233/*****************************************************************************
2234 * SerialIoctl
2235 * this function handles any ioctl calls to the driver
2236 *****************************************************************************/
2237
95da310e 2238static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
3f542974
PS		 2239 unsigned int cmd, unsigned long arg)
2240{
95da310e 2241 struct usb_serial_port *port = tty->driver_data;
97c4965d 2242 void __user *argp = (void __user *)arg;
3f542974 2243 struct moschip_port *mos7840_port;
3f542974
PS		 2244
2245 struct async_icount cnow;
2246 struct async_icount cprev;
3f542974 2247
441b62c1 2248 if (mos7840_port_paranoia_check(port, __func__)) {
84fe6e79 2249 dbg("%s", "Invalid port");
3f542974
PS		 2250 return -1;
2251 }
2252
2253 mos7840_port = mos7840_get_port_private(port);
3f542974
PS		 2254
2255 if (mos7840_port == NULL)
2256 return -1;
2257
441b62c1 2258 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
3f542974
PS		 2259
2260 switch (cmd) {
2261 /* return number of bytes available */
2262
3f542974 2263 case TIOCSERGETLSR:
441b62c1 2264 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
95da310e 2265 return mos7840_get_lsr_info(tty, argp);
3f542974
PS		 2266 return 0;
2267
3f542974 2268 case TIOCGSERIAL:
441b62c1 2269 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
97c4965d 2270 return mos7840_get_serial_info(mos7840_port, argp);
3f542974
PS		 2271
2272 case TIOCSSERIAL:
441b62c1 2273 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
3f542974
PS		 2274 break;
2275
2276 case TIOCMIWAIT:
441b62c1 2277 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
3f542974
PS		 2278 cprev = mos7840_port->icount;
2279 while (1) {
880af9db 2280 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
3f542974
PS		 2281 mos7840_port->delta_msr_cond = 0;
2282 wait_event_interruptible(mos7840_port->delta_msr_wait,
2283 (mos7840_port->
2284 delta_msr_cond == 1));
2285
2286 /* see if a signal did it */
2287 if (signal_pending(current))
2288 return -ERESTARTSYS;
2289 cnow = mos7840_port->icount;
0de9a702 2290 smp_rmb();
3f542974
PS		 2291 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2292 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2293 return -EIO; /* no change => error */
2294 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2295 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2296 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2297 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2298 return 0;
2299 }
2300 cprev = cnow;
2301 }
2302 /* NOTREACHED */
2303 break;
2304
3f542974
PS		 2305 default:
2306 break;
2307 }
3f542974
PS		 2308 return -ENOIOCTLCMD;
2309}
2310
2311static int mos7840_calc_num_ports(struct usb_serial *serial)
2312{
0de9a702 2313 int mos7840_num_ports = 0;
3f542974 2314
84fe6e79
TC		 2315 dbg("numberofendpoints: cur %d, alt %d",
2316 (int)serial->interface->cur_altsetting->desc.bNumEndpoints,
3f542974
PS		 2317 (int)serial->interface->altsetting->desc.bNumEndpoints);
2318 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
0de9a702 2319 mos7840_num_ports = serial->num_ports = 2;
3f542974 2320 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
0de9a702
ON		 2321 serial->num_bulk_in = 4;
2322 serial->num_bulk_out = 4;
2323 mos7840_num_ports = serial->num_ports = 4;
3f542974 2324 }
84fe6e79 2325 dbg ("mos7840_num_ports = %d", mos7840_num_ports);
3f542974
PS		 2326 return mos7840_num_ports;
2327}
2328
2329/****************************************************************************
2330 * mos7840_startup
2331 ****************************************************************************/
2332
2333static int mos7840_startup(struct usb_serial *serial)
2334{
2335 struct moschip_port *mos7840_port;
2336 struct usb_device *dev;
2337 int i, status;
2338
2339 __u16 Data;
84fe6e79 2340 dbg("%s", "mos7840_startup :Entering..........");
3f542974
PS		 2341
2342 if (!serial) {
84fe6e79 2343 dbg("%s", "Invalid Handler");
3f542974
PS		 2344 return -1;
2345 }
2346
2347 dev = serial->dev;
2348
84fe6e79
TC		 2349 dbg("%s", "Entering...");
2350 dbg ("mos7840_startup: serial = %p", serial);
3f542974
PS		 2351
2352 /* we set up the pointers to the endpoints in the mos7840_open *
2353 * function, as the structures aren't created yet. */
2354
2355 /* set up port private structures */
2356 for (i = 0; i < serial->num_ports; ++i) {
84fe6e79 2357 dbg ("mos7840_startup: configuring port %d............", i);
7ac9da10 2358 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
3f542974 2359 if (mos7840_port == NULL) {
194343d9 2360 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
0de9a702
ON		 2361 status = -ENOMEM;
2362 i--; /* don't follow NULL pointer cleaning up */
2363 goto error;
3f542974 2364 }
3f542974 2365
880af9db
AC		 2366 /* Initialize all port interrupt end point to port 0 int
2367 * endpoint. Our device has only one interrupt end point
2368 * common to all port */
3f542974
PS		 2369
2370 mos7840_port->port = serial->port[i];
2371 mos7840_set_port_private(serial->port[i], mos7840_port);
0de9a702 2372 spin_lock_init(&mos7840_port->pool_lock);
3f542974 2373
37768adf
TC		 2374 /* minor is not initialised until later by
2375 * usb-serial.c:get_free_serial() and cannot therefore be used
2376 * to index device instances */
2377 mos7840_port->port_num = i + 1;
2378 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2379 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2380 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2381 dbg ("serial->minor = %d", serial->minor);
3f542974
PS		 2382
2383 if (mos7840_port->port_num == 1) {
2384 mos7840_port->SpRegOffset = 0x0;
2385 mos7840_port->ControlRegOffset = 0x1;
2386 mos7840_port->DcrRegOffset = 0x4;
2387 } else if ((mos7840_port->port_num == 2)
0de9a702 2388 && (serial->num_ports == 4)) {
3f542974
PS		 2389 mos7840_port->SpRegOffset = 0x8;
2390 mos7840_port->ControlRegOffset = 0x9;
2391 mos7840_port->DcrRegOffset = 0x16;
2392 } else if ((mos7840_port->port_num == 2)
0de9a702 2393 && (serial->num_ports == 2)) {
3f542974
PS		 2394 mos7840_port->SpRegOffset = 0xa;
2395 mos7840_port->ControlRegOffset = 0xb;
2396 mos7840_port->DcrRegOffset = 0x19;
2397 } else if ((mos7840_port->port_num == 3)
0de9a702 2398 && (serial->num_ports == 4)) {
3f542974
PS		 2399 mos7840_port->SpRegOffset = 0xa;
2400 mos7840_port->ControlRegOffset = 0xb;
2401 mos7840_port->DcrRegOffset = 0x19;
2402 } else if ((mos7840_port->port_num == 4)
0de9a702 2403 && (serial->num_ports == 4)) {
3f542974
PS		 2404 mos7840_port->SpRegOffset = 0xc;
2405 mos7840_port->ControlRegOffset = 0xd;
2406 mos7840_port->DcrRegOffset = 0x1c;
2407 }
2408 mos7840_dump_serial_port(mos7840_port);
3f542974
PS		 2409 mos7840_set_port_private(serial->port[i], mos7840_port);
2410
880af9db
AC		 2411 /* enable rx_disable bit in control register */
2412 status = mos7840_get_reg_sync(serial->port[i],
2413 mos7840_port->ControlRegOffset, &Data);
3f542974 2414 if (status < 0) {
84fe6e79 2415 dbg("Reading ControlReg failed status-0x%x", status);
3f542974
PS		 2416 break;
2417 } else
84fe6e79 2418 dbg("ControlReg Reading success val is %x, status%d",
3f542974 2419 Data, status);
880af9db
AC		 2420 Data |= 0x08; /* setting driver done bit */
2421 Data |= 0x04; /* sp1_bit to have cts change reflect in
2422 modem status reg */
3f542974 2423
880af9db
AC		 2424 /* Data |= 0x20; //rx_disable bit */
2425 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2426 mos7840_port->ControlRegOffset, Data);
2427 if (status < 0) {
84fe6e79 2428 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
3f542974
PS		 2429 break;
2430 } else
84fe6e79 2431 dbg("ControlReg Writing success(rx_disable) status%d",
3f542974
PS		 2432 status);
2433
880af9db
AC		 2434 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2435 and 0x24 in DCR3 */
3f542974 2436 Data = 0x01;
880af9db
AC		 2437 status = mos7840_set_reg_sync(serial->port[i],
2438 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
3f542974 2439 if (status < 0) {
84fe6e79 2440 dbg("Writing DCR0 failed status-0x%x", status);
3f542974
PS		 2441 break;
2442 } else
84fe6e79 2443 dbg("DCR0 Writing success status%d", status);
3f542974
PS		 2444
2445 Data = 0x05;
880af9db
AC		 2446 status = mos7840_set_reg_sync(serial->port[i],
2447 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
3f542974 2448 if (status < 0) {
84fe6e79 2449 dbg("Writing DCR1 failed status-0x%x", status);
3f542974
PS		 2450 break;
2451 } else
84fe6e79 2452 dbg("DCR1 Writing success status%d", status);
3f542974
PS		 2453
2454 Data = 0x24;
880af9db
AC		 2455 status = mos7840_set_reg_sync(serial->port[i],
2456 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
3f542974 2457 if (status < 0) {
84fe6e79 2458 dbg("Writing DCR2 failed status-0x%x", status);
3f542974
PS		 2459 break;
2460 } else
84fe6e79 2461 dbg("DCR2 Writing success status%d", status);
3f542974 2462
880af9db 2463 /* write values in clkstart0x0 and clkmulti 0x20 */
3f542974 2464 Data = 0x0;
880af9db 2465 status = mos7840_set_reg_sync(serial->port[i],
3f542974
PS		 2466 CLK_START_VALUE_REGISTER, Data);
2467 if (status < 0) {
84fe6e79 2468 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
3f542974
PS		 2469 break;
2470 } else
84fe6e79 2471 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
3f542974
PS		 2472
2473 Data = 0x20;
880af9db
AC		 2474 status = mos7840_set_reg_sync(serial->port[i],
2475 CLK_MULTI_REGISTER, Data);
3f542974 2476 if (status < 0) {
84fe6e79 2477 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
3f542974 2478 status);
0de9a702 2479 goto error;
3f542974 2480 } else
84fe6e79 2481 dbg("CLK_MULTI_REGISTER Writing success status%d",
3f542974
PS		 2482 status);
2483
880af9db 2484 /* write value 0x0 to scratchpad register */
3f542974 2485 Data = 0x00;
880af9db
AC		 2486 status = mos7840_set_uart_reg(serial->port[i],
2487 SCRATCH_PAD_REGISTER, Data);
3f542974 2488 if (status < 0) {
84fe6e79 2489 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
3f542974
PS		 2490 status);
2491 break;
2492 } else
84fe6e79 2493 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
3f542974
PS		 2494 status);
2495
880af9db 2496 /* Zero Length flag register */
3f542974 2497 if ((mos7840_port->port_num != 1)
0de9a702 2498 && (serial->num_ports == 2)) {
3f542974
PS		 2499
2500 Data = 0xff;
3f542974 2501 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2502 (__u16) (ZLP_REG1 +
2503 ((__u16)mos7840_port->port_num)), Data);
84fe6e79 2504 dbg("ZLIP offset %x",
3f542974 2505 (__u16) (ZLP_REG1 +
880af9db 2506 ((__u16) mos7840_port->port_num)));
3f542974 2507 if (status < 0) {
84fe6e79 2508 dbg("Writing ZLP_REG%d failed status-0x%x",
3f542974
PS		 2509 i + 2, status);
2510 break;
2511 } else
84fe6e79 2512 dbg("ZLP_REG%d Writing success status%d",
3f542974
PS		 2513 i + 2, status);
2514 } else {
2515 Data = 0xff;
3f542974 2516 status = mos7840_set_reg_sync(serial->port[i],
880af9db
AC		 2517 (__u16) (ZLP_REG1 +
2518 ((__u16)mos7840_port->port_num) - 0x1), Data);
84fe6e79 2519 dbg("ZLIP offset %x",
3f542974
PS		 2520 (__u16) (ZLP_REG1 +
2521 ((__u16) mos7840_port->port_num) - 0x1));
2522 if (status < 0) {
84fe6e79 2523 dbg("Writing ZLP_REG%d failed status-0x%x",
3f542974
PS		 2524 i + 1, status);
2525 break;
2526 } else
84fe6e79 2527 dbg("ZLP_REG%d Writing success status%d",
3f542974
PS		 2528 i + 1, status);
2529
2530 }
0de9a702 2531 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
3f542974 2532 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
880af9db
AC		 2533 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2534 GFP_KERNEL);
2535 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2536 !mos7840_port->dr) {
0de9a702
ON		 2537 status = -ENOMEM;
2538 goto error;
2539 }
3f542974 2540 }
84fe6e79 2541 dbg ("mos7840_startup: all ports configured...........");
3f542974 2542
880af9db 2543 /* Zero Length flag enable */
3f542974 2544 Data = 0x0f;
3f542974
PS		 2545 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2546 if (status < 0) {
84fe6e79 2547 dbg("Writing ZLP_REG5 failed status-0x%x", status);
7ced46c3 2548 goto error;
3f542974 2549 } else
84fe6e79 2550 dbg("ZLP_REG5 Writing success status%d", status);
3f542974
PS		 2551
2552 /* setting configuration feature to one */
2553 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
97c4965d 2554 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
3f542974 2555 return 0;
0de9a702
ON		 2556error:
2557 for (/* nothing */; i >= 0; i--) {
2558 mos7840_port = mos7840_get_port_private(serial->port[i]);
2559
2560 kfree(mos7840_port->dr);
2561 kfree(mos7840_port->ctrl_buf);
2562 usb_free_urb(mos7840_port->control_urb);
2563 kfree(mos7840_port);
2564 serial->port[i] = NULL;
2565 }
2566 return status;
3f542974
PS		 2567}
2568
2569/****************************************************************************
f9c99bb8 2570 * mos7840_disconnect
3f542974
PS		 2571 * This function is called whenever the device is removed from the usb bus.
2572 ****************************************************************************/
2573
f9c99bb8 2574static void mos7840_disconnect(struct usb_serial *serial)
3f542974
PS		 2575{
2576 int i;
0de9a702 2577 unsigned long flags;
3f542974 2578 struct moschip_port *mos7840_port;
f9c99bb8 2579 dbg("%s", " disconnect :entering..........");
3f542974
PS		 2580
2581 if (!serial) {
84fe6e79 2582 dbg("%s", "Invalid Handler");
3f542974
PS		 2583 return;
2584 }
2585
880af9db 2586 /* check for the ports to be closed,close the ports and disconnect */
3f542974
PS		 2587
2588 /* free private structure allocated for serial port *
2589 * stop reads and writes on all ports */
2590
2591 for (i = 0; i < serial->num_ports; ++i) {
2592 mos7840_port = mos7840_get_port_private(serial->port[i]);
37768adf
TC		 2593 dbg ("mos7840_port %d = %p", i, mos7840_port);
2594 if (mos7840_port) {
2595 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2596 mos7840_port->zombie = 1;
2597 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
2598 usb_kill_urb(mos7840_port->control_urb);
f9c99bb8
AS		 2599 }
2600 }
2601
2602 dbg("%s", "Thank u :: ");
2603
2604}
2605
2606/****************************************************************************
2607 * mos7840_release
2608 * This function is called when the usb_serial structure is freed.
2609 ****************************************************************************/
2610
2611static void mos7840_release(struct usb_serial *serial)
2612{
2613 int i;
2614 struct moschip_port *mos7840_port;
2615 dbg("%s", " release :entering..........");
2616
2617 if (!serial) {
2618 dbg("%s", "Invalid Handler");
2619 return;
2620 }
2621
2622 /* check for the ports to be closed,close the ports and disconnect */
2623
2624 /* free private structure allocated for serial port *
2625 * stop reads and writes on all ports */
2626
2627 for (i = 0; i < serial->num_ports; ++i) {
2628 mos7840_port = mos7840_get_port_private(serial->port[i]);
2629 dbg("mos7840_port %d = %p", i, mos7840_port);
2630 if (mos7840_port) {
37768adf
TC		 2631 kfree(mos7840_port->ctrl_buf);
2632 kfree(mos7840_port->dr);
2633 kfree(mos7840_port);
2634 }
3f542974
PS		 2635 }
2636
84fe6e79 2637 dbg("%s", "Thank u :: ");
3f542974
PS		 2638
2639}
2640
d9b1b787
JH		 2641static struct usb_driver io_driver = {
2642 .name = "mos7840",
2643 .probe = usb_serial_probe,
2644 .disconnect = usb_serial_disconnect,
2645 .id_table = moschip_id_table_combined,
2646 .no_dynamic_id = 1,
2647};
2648
3f542974
PS		 2649static struct usb_serial_driver moschip7840_4port_device = {
2650 .driver = {
2651 .owner = THIS_MODULE,
2652 .name = "mos7840",
2653 },
2654 .description = DRIVER_DESC,
d9b1b787 2655 .usb_driver = &io_driver,
3f542974 2656 .id_table = moschip_port_id_table,
3f542974 2657 .num_ports = 4,
3f542974
PS		 2658 .open = mos7840_open,
2659 .close = mos7840_close,
2660 .write = mos7840_write,
2661 .write_room = mos7840_write_room,
2662 .chars_in_buffer = mos7840_chars_in_buffer,
2663 .throttle = mos7840_throttle,
2664 .unthrottle = mos7840_unthrottle,
2665 .calc_num_ports = mos7840_calc_num_ports,
2666#ifdef MCSSerialProbe
2667 .probe = mos7840_serial_probe,
2668#endif
2669 .ioctl = mos7840_ioctl,
2670 .set_termios = mos7840_set_termios,
2671 .break_ctl = mos7840_break,
2672 .tiocmget = mos7840_tiocmget,
2673 .tiocmset = mos7840_tiocmset,
0bca1b91 2674 .get_icount = mos7840_get_icount,
3f542974 2675 .attach = mos7840_startup,
f9c99bb8
AS		 2676 .disconnect = mos7840_disconnect,
2677 .release = mos7840_release,
3f542974
PS		 2678 .read_bulk_callback = mos7840_bulk_in_callback,
2679 .read_int_callback = mos7840_interrupt_callback,
2680};
2681
3f542974
PS		 2682/****************************************************************************
2683 * moschip7840_init
2684 * This is called by the module subsystem, or on startup to initialize us
2685 ****************************************************************************/
2686static int __init moschip7840_init(void)
2687{
2688 int retval;
2689
84fe6e79 2690 dbg("%s", " mos7840_init :entering..........");
3f542974
PS		 2691
2692 /* Register with the usb serial */
2693 retval = usb_serial_register(&moschip7840_4port_device);
2694
2695 if (retval)
2696 goto failed_port_device_register;
2697
84fe6e79 2698 dbg("%s", "Entering...");
c197a8db
GKH		 2699 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2700 DRIVER_DESC "\n");
3f542974
PS		 2701
2702 /* Register with the usb */
2703 retval = usb_register(&io_driver);
3f542974 2704 if (retval == 0) {
84fe6e79 2705 dbg("%s", "Leaving...");
3f542974
PS		 2706 return 0;
2707 }
3f542974 2708 usb_serial_deregister(&moschip7840_4port_device);
880af9db 2709failed_port_device_register:
3f542974
PS		 2710 return retval;
2711}
2712
2713/****************************************************************************
2714 * moschip7840_exit
2715 * Called when the driver is about to be unloaded.
2716 ****************************************************************************/
2717static void __exit moschip7840_exit(void)
2718{
2719
84fe6e79 2720 dbg("%s", " mos7840_exit :entering..........");
3f542974
PS		 2721
2722 usb_deregister(&io_driver);
2723
2724 usb_serial_deregister(&moschip7840_4port_device);
2725
84fe6e79 2726 dbg("%s", "Entering...");
3f542974
PS		 2727}
2728
2729module_init(moschip7840_init);
2730module_exit(moschip7840_exit);
2731
2732/* Module information */
2733MODULE_DESCRIPTION(DRIVER_DESC);
2734MODULE_LICENSE("GPL");
2735
2736module_param(debug, bool, S_IRUGO | S_IWUSR);
2737MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux kernel - Deliverables
This page took 0.809959 seconds and 5 git commands to generate.