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ARM: cpu topology: Add debugfs interface for cpu_power
[cmplus.git] / drivers / usb / serial / mos7840.c
blob32575196cbf16d56d280f019f92212ad3c7d68e7
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>
36 #include <linux/uaccess.h>
37
38 /*
39 * Version Information
40 */
41 #define DRIVER_VERSION "1.3.2"
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
85 #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
86 #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
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
105 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
106 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
107
108 /* For higher baud Rates use TIOCEXBAUD */
109 #define TIOCEXBAUD 0x5462
110
111 /* vendor id and device id defines */
112
113 /* The native mos7840/7820 component */
114 #define USB_VENDOR_ID_MOSCHIP 0x9710
115 #define MOSCHIP_DEVICE_ID_7840 0x7840
116 #define MOSCHIP_DEVICE_ID_7820 0x7820
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 */
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
136
137 /* This driver also supports
138 * ATEN UC2324 device using Moschip MCS7840
139 * ATEN UC2322 device using Moschip MCS7820
140 */
141 #define USB_VENDOR_ID_ATENINTL 0x0557
142 #define ATENINTL_DEVICE_ID_UC2324 0x2011
143 #define ATENINTL_DEVICE_ID_UC2322 0x7820
144
145 /* Interrupt Routine Defines */
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
164 /* Serial Port register Address */
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 #define GPIO_REGISTER ((__u16)(0x07))
178
179 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
180
181 /*
182 * URB POOL related defines
183 */
184 #define NUM_URBS 16 /* URB Count */
185 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
186
187
188 static const struct usb_device_id moschip_port_id_table[] = {
189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
190 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
191 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
204 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
205 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
206 {} /* terminating entry */
207 };
208
209 static const struct usb_device_id moschip_id_table_combined[] __devinitconst = {
210 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
211 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
212 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
213 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
214 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
215 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
216 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
217 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
218 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
219 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
220 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
221 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
222 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
223 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
224 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
225 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
226 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
227 {} /* terminating entry */
228 };
229
230 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
231
232 /* This structure holds all of the local port information */
233
234 struct moschip_port {
235 int port_num; /*Actual port number in the device(1,2,etc) */
236 struct urb *write_urb; /* write URB for this port */
237 struct urb *read_urb; /* read URB for this port */
238 struct urb *int_urb;
239 __u8 shadowLCR; /* last LCR value received */
240 __u8 shadowMCR; /* last MCR value received */
241 char open;
242 char open_ports;
243 char zombie;
244 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
245 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
246 int delta_msr_cond;
247 struct async_icount icount;
248 struct usb_serial_port *port; /* loop back to the owner of this object */
249
250 /* Offsets */
251 __u8 SpRegOffset;
252 __u8 ControlRegOffset;
253 __u8 DcrRegOffset;
254 /* for processing control URBS in interrupt context */
255 struct urb *control_urb;
256 struct usb_ctrlrequest *dr;
257 char *ctrl_buf;
258 int MsrLsr;
259
260 spinlock_t pool_lock;
261 struct urb *write_urb_pool[NUM_URBS];
262 char busy[NUM_URBS];
263 bool read_urb_busy;
264 };
265
266
267 static int debug;
268
269 /*
270 * mos7840_set_reg_sync
271 * To set the Control register by calling usb_fill_control_urb function
272 * by passing usb_sndctrlpipe function as parameter.
273 */
274
275 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
276 __u16 val)
277 {
278 struct usb_device *dev = port->serial->dev;
279 val = val & 0x00ff;
280 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val);
281
282 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
283 MCS_WR_RTYPE, val, reg, NULL, 0,
284 MOS_WDR_TIMEOUT);
285 }
286
287 /*
288 * mos7840_get_reg_sync
289 * To set the Uart register by calling usb_fill_control_urb function by
290 * passing usb_rcvctrlpipe function as parameter.
291 */
292
293 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
294 __u16 *val)
295 {
296 struct usb_device *dev = port->serial->dev;
297 int ret = 0;
298 u8 *buf;
299
300 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
301 if (!buf)
302 return -ENOMEM;
303
304 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
305 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
306 MOS_WDR_TIMEOUT);
307 *val = buf[0];
308 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
309
310 kfree(buf);
311 return ret;
312 }
313
314 /*
315 * mos7840_set_uart_reg
316 * To set the Uart register by calling usb_fill_control_urb function by
317 * passing usb_sndctrlpipe function as parameter.
318 */
319
320 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
321 __u16 val)
322 {
323
324 struct usb_device *dev = port->serial->dev;
325 val = val & 0x00ff;
326 /* For the UART control registers, the application number need
327 to be Or'ed */
328 if (port->serial->num_ports == 4) {
329 val |= (((__u16) port->number -
330 (__u16) (port->serial->minor)) + 1) << 8;
331 dbg("mos7840_set_uart_reg application number is %x", val);
332 } else {
333 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
334 val |= (((__u16) port->number -
335 (__u16) (port->serial->minor)) + 1) << 8;
336 dbg("mos7840_set_uart_reg application number is %x",
337 val);
338 } else {
339 val |=
340 (((__u16) port->number -
341 (__u16) (port->serial->minor)) + 2) << 8;
342 dbg("mos7840_set_uart_reg application number is %x",
343 val);
344 }
345 }
346 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
347 MCS_WR_RTYPE, val, reg, NULL, 0,
348 MOS_WDR_TIMEOUT);
349
350 }
351
352 /*
353 * mos7840_get_uart_reg
354 * To set the Control register by calling usb_fill_control_urb function
355 * by passing usb_rcvctrlpipe function as parameter.
356 */
357 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
358 __u16 *val)
359 {
360 struct usb_device *dev = port->serial->dev;
361 int ret = 0;
362 __u16 Wval;
363 u8 *buf;
364
365 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
366 if (!buf)
367 return -ENOMEM;
368
369 /* dbg("application number is %4x",
370 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
371 /* Wval is same as application number */
372 if (port->serial->num_ports == 4) {
373 Wval =
374 (((__u16) port->number - (__u16) (port->serial->minor)) +
375 1) << 8;
376 dbg("mos7840_get_uart_reg application number is %x", Wval);
377 } else {
378 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
379 Wval = (((__u16) port->number -
380 (__u16) (port->serial->minor)) + 1) << 8;
381 dbg("mos7840_get_uart_reg application number is %x",
382 Wval);
383 } else {
384 Wval = (((__u16) port->number -
385 (__u16) (port->serial->minor)) + 2) << 8;
386 dbg("mos7840_get_uart_reg application number is %x",
387 Wval);
388 }
389 }
390 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
391 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
392 MOS_WDR_TIMEOUT);
393 *val = buf[0];
394
395 kfree(buf);
396 return ret;
397 }
398
399 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
400 {
401
402 dbg("***************************************");
403 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset);
404 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset);
405 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset);
406 dbg("***************************************");
407
408 }
409
410 /************************************************************************/
411 /************************************************************************/
412 /* I N T E R F A C E F U N C T I O N S */
413 /* I N T E R F A C E F U N C T I O N S */
414 /************************************************************************/
415 /************************************************************************/
416
417 static inline void mos7840_set_port_private(struct usb_serial_port *port,
418 struct moschip_port *data)
419 {
420 usb_set_serial_port_data(port, (void *)data);
421 }
422
423 static inline struct moschip_port *mos7840_get_port_private(struct
424 usb_serial_port
425 *port)
426 {
427 return (struct moschip_port *)usb_get_serial_port_data(port);
428 }
429
430 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
431 {
432 struct moschip_port *mos7840_port;
433 struct async_icount *icount;
434 mos7840_port = port;
435 icount = &mos7840_port->icount;
436 if (new_msr &
437 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
438 MOS_MSR_DELTA_CD)) {
439 icount = &mos7840_port->icount;
440
441 /* update input line counters */
442 if (new_msr & MOS_MSR_DELTA_CTS) {
443 icount->cts++;
444 smp_wmb();
445 }
446 if (new_msr & MOS_MSR_DELTA_DSR) {
447 icount->dsr++;
448 smp_wmb();
449 }
450 if (new_msr & MOS_MSR_DELTA_CD) {
451 icount->dcd++;
452 smp_wmb();
453 }
454 if (new_msr & MOS_MSR_DELTA_RI) {
455 icount->rng++;
456 smp_wmb();
457 }
458 }
459 }
460
461 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
462 {
463 struct async_icount *icount;
464
465 dbg("%s - %02x", __func__, new_lsr);
466
467 if (new_lsr & SERIAL_LSR_BI) {
468 /*
469 * Parity and Framing errors only count if they
470 * occur exclusive of a break being
471 * received.
472 */
473 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
474 }
475
476 /* update input line counters */
477 icount = &port->icount;
478 if (new_lsr & SERIAL_LSR_BI) {
479 icount->brk++;
480 smp_wmb();
481 }
482 if (new_lsr & SERIAL_LSR_OE) {
483 icount->overrun++;
484 smp_wmb();
485 }
486 if (new_lsr & SERIAL_LSR_PE) {
487 icount->parity++;
488 smp_wmb();
489 }
490 if (new_lsr & SERIAL_LSR_FE) {
491 icount->frame++;
492 smp_wmb();
493 }
494 }
495
496 /************************************************************************/
497 /************************************************************************/
498 /* U S B C A L L B A C K F U N C T I O N S */
499 /* U S B C A L L B A C K F U N C T I O N S */
500 /************************************************************************/
501 /************************************************************************/
502
503 static void mos7840_control_callback(struct urb *urb)
504 {
505 unsigned char *data;
506 struct moschip_port *mos7840_port;
507 __u8 regval = 0x0;
508 int result = 0;
509 int status = urb->status;
510
511 mos7840_port = urb->context;
512
513 switch (status) {
514 case 0:
515 /* success */
516 break;
517 case -ECONNRESET:
518 case -ENOENT:
519 case -ESHUTDOWN:
520 /* this urb is terminated, clean up */
521 dbg("%s - urb shutting down with status: %d", __func__,
522 status);
523 return;
524 default:
525 dbg("%s - nonzero urb status received: %d", __func__,
526 status);
527 goto exit;
528 }
529
530 dbg("%s urb buffer size is %d", __func__, urb->actual_length);
531 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__,
532 mos7840_port->MsrLsr, mos7840_port->port_num);
533 data = urb->transfer_buffer;
534 regval = (__u8) data[0];
535 dbg("%s data is %x", __func__, regval);
536 if (mos7840_port->MsrLsr == 0)
537 mos7840_handle_new_msr(mos7840_port, regval);
538 else if (mos7840_port->MsrLsr == 1)
539 mos7840_handle_new_lsr(mos7840_port, regval);
540
541 exit:
542 spin_lock(&mos7840_port->pool_lock);
543 if (!mos7840_port->zombie)
544 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
545 spin_unlock(&mos7840_port->pool_lock);
546 if (result) {
547 dev_err(&urb->dev->dev,
548 "%s - Error %d submitting interrupt urb\n",
549 __func__, result);
550 }
551 }
552
553 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
554 __u16 *val)
555 {
556 struct usb_device *dev = mcs->port->serial->dev;
557 struct usb_ctrlrequest *dr = mcs->dr;
558 unsigned char *buffer = mcs->ctrl_buf;
559 int ret;
560
561 dr->bRequestType = MCS_RD_RTYPE;
562 dr->bRequest = MCS_RDREQ;
563 dr->wValue = cpu_to_le16(Wval); /* 0 */
564 dr->wIndex = cpu_to_le16(reg);
565 dr->wLength = cpu_to_le16(2);
566
567 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
568 (unsigned char *)dr, buffer, 2,
569 mos7840_control_callback, mcs);
570 mcs->control_urb->transfer_buffer_length = 2;
571 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
572 return ret;
573 }
574
575 /*****************************************************************************
576 * mos7840_interrupt_callback
577 * this is the callback function for when we have received data on the
578 * interrupt endpoint.
579 *****************************************************************************/
580
581 static void mos7840_interrupt_callback(struct urb *urb)
582 {
583 int result;
584 int length;
585 struct moschip_port *mos7840_port;
586 struct usb_serial *serial;
587 __u16 Data;
588 unsigned char *data;
589 __u8 sp[5], st;
590 int i, rv = 0;
591 __u16 wval, wreg = 0;
592 int status = urb->status;
593
594 dbg("%s", " : Entering");
595
596 switch (status) {
597 case 0:
598 /* success */
599 break;
600 case -ECONNRESET:
601 case -ENOENT:
602 case -ESHUTDOWN:
603 /* this urb is terminated, clean up */
604 dbg("%s - urb shutting down with status: %d", __func__,
605 status);
606 return;
607 default:
608 dbg("%s - nonzero urb status received: %d", __func__,
609 status);
610 goto exit;
611 }
612
613 length = urb->actual_length;
614 data = urb->transfer_buffer;
615
616 serial = urb->context;
617
618 /* Moschip get 5 bytes
619 * Byte 1 IIR Port 1 (port.number is 0)
620 * Byte 2 IIR Port 2 (port.number is 1)
621 * Byte 3 IIR Port 3 (port.number is 2)
622 * Byte 4 IIR Port 4 (port.number is 3)
623 * Byte 5 FIFO status for both */
624
625 if (length && length > 5) {
626 dbg("%s", "Wrong data !!!");
627 return;
628 }
629
630 sp[0] = (__u8) data[0];
631 sp[1] = (__u8) data[1];
632 sp[2] = (__u8) data[2];
633 sp[3] = (__u8) data[3];
634 st = (__u8) data[4];
635
636 for (i = 0; i < serial->num_ports; i++) {
637 mos7840_port = mos7840_get_port_private(serial->port[i]);
638 wval =
639 (((__u16) serial->port[i]->number -
640 (__u16) (serial->minor)) + 1) << 8;
641 if (mos7840_port->open) {
642 if (sp[i] & 0x01) {
643 dbg("SP%d No Interrupt !!!", i);
644 } else {
645 switch (sp[i] & 0x0f) {
646 case SERIAL_IIR_RLS:
647 dbg("Serial Port %d: Receiver status error or ", i);
648 dbg("address bit detected in 9-bit mode");
649 mos7840_port->MsrLsr = 1;
650 wreg = LINE_STATUS_REGISTER;
651 break;
652 case SERIAL_IIR_MS:
653 dbg("Serial Port %d: Modem status change", i);
654 mos7840_port->MsrLsr = 0;
655 wreg = MODEM_STATUS_REGISTER;
656 break;
657 }
658 spin_lock(&mos7840_port->pool_lock);
659 if (!mos7840_port->zombie) {
660 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
661 } else {
662 spin_unlock(&mos7840_port->pool_lock);
663 return;
664 }
665 spin_unlock(&mos7840_port->pool_lock);
666 }
667 }
668 }
669 if (!(rv < 0))
670 /* the completion handler for the control urb will resubmit */
671 return;
672 exit:
673 result = usb_submit_urb(urb, GFP_ATOMIC);
674 if (result) {
675 dev_err(&urb->dev->dev,
676 "%s - Error %d submitting interrupt urb\n",
677 __func__, result);
678 }
679 }
680
681 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
682 const char *function)
683 {
684 if (!port) {
685 dbg("%s - port == NULL", function);
686 return -1;
687 }
688 if (!port->serial) {
689 dbg("%s - port->serial == NULL", function);
690 return -1;
691 }
692
693 return 0;
694 }
695
696 /* Inline functions to check the sanity of a pointer that is passed to us */
697 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
698 const char *function)
699 {
700 if (!serial) {
701 dbg("%s - serial == NULL", function);
702 return -1;
703 }
704 if (!serial->type) {
705 dbg("%s - serial->type == NULL!", function);
706 return -1;
707 }
708
709 return 0;
710 }
711
712 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
713 const char *function)
714 {
715 /* if no port was specified, or it fails a paranoia check */
716 if (!port ||
717 mos7840_port_paranoia_check(port, function) ||
718 mos7840_serial_paranoia_check(port->serial, function)) {
719 /* then say that we don't have a valid usb_serial thing,
720 * which will end up genrating -ENODEV return values */
721 return NULL;
722 }
723
724 return port->serial;
725 }
726
727 /*****************************************************************************
728 * mos7840_bulk_in_callback
729 * this is the callback function for when we have received data on the
730 * bulk in endpoint.
731 *****************************************************************************/
732
733 static void mos7840_bulk_in_callback(struct urb *urb)
734 {
735 int retval;
736 unsigned char *data;
737 struct usb_serial *serial;
738 struct usb_serial_port *port;
739 struct moschip_port *mos7840_port;
740 struct tty_struct *tty;
741 int status = urb->status;
742
743 mos7840_port = urb->context;
744 if (!mos7840_port) {
745 dbg("%s", "NULL mos7840_port pointer");
746 return;
747 }
748
749 if (status) {
750 dbg("nonzero read bulk status received: %d", status);
751 mos7840_port->read_urb_busy = false;
752 return;
753 }
754
755 port = (struct usb_serial_port *)mos7840_port->port;
756 if (mos7840_port_paranoia_check(port, __func__)) {
757 dbg("%s", "Port Paranoia failed");
758 mos7840_port->read_urb_busy = false;
759 return;
760 }
761
762 serial = mos7840_get_usb_serial(port, __func__);
763 if (!serial) {
764 dbg("%s", "Bad serial pointer");
765 mos7840_port->read_urb_busy = false;
766 return;
767 }
768
769 dbg("%s", "Entering... ");
770
771 data = urb->transfer_buffer;
772
773 dbg("%s", "Entering ...........");
774
775 if (urb->actual_length) {
776 tty = tty_port_tty_get(&mos7840_port->port->port);
777 if (tty) {
778 tty_insert_flip_string(tty, data, urb->actual_length);
779 dbg(" %s ", data);
780 tty_flip_buffer_push(tty);
781 tty_kref_put(tty);
782 }
783 mos7840_port->icount.rx += urb->actual_length;
784 smp_wmb();
785 dbg("mos7840_port->icount.rx is %d:",
786 mos7840_port->icount.rx);
787 }
788
789 if (!mos7840_port->read_urb) {
790 dbg("%s", "URB KILLED !!!");
791 mos7840_port->read_urb_busy = false;
792 return;
793 }
794
795
796 mos7840_port->read_urb->dev = serial->dev;
797
798 mos7840_port->read_urb_busy = true;
799 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
800
801 if (retval) {
802 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
803 mos7840_port->read_urb_busy = false;
804 }
805 }
806
807 /*****************************************************************************
808 * mos7840_bulk_out_data_callback
809 * this is the callback function for when we have finished sending
810 * serial data on the bulk out endpoint.
811 *****************************************************************************/
812
813 static void mos7840_bulk_out_data_callback(struct urb *urb)
814 {
815 struct moschip_port *mos7840_port;
816 struct tty_struct *tty;
817 int status = urb->status;
818 int i;
819
820 mos7840_port = urb->context;
821 spin_lock(&mos7840_port->pool_lock);
822 for (i = 0; i < NUM_URBS; i++) {
823 if (urb == mos7840_port->write_urb_pool[i]) {
824 mos7840_port->busy[i] = 0;
825 break;
826 }
827 }
828 spin_unlock(&mos7840_port->pool_lock);
829
830 if (status) {
831 dbg("nonzero write bulk status received:%d", status);
832 return;
833 }
834
835 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
836 dbg("%s", "Port Paranoia failed");
837 return;
838 }
839
840 dbg("%s", "Entering .........");
841
842 tty = tty_port_tty_get(&mos7840_port->port->port);
843 if (tty && mos7840_port->open)
844 tty_wakeup(tty);
845 tty_kref_put(tty);
846
847 }
848
849 /************************************************************************/
850 /* D R I V E R T T Y I N T E R F A C E F U N C T I O N S */
851 /************************************************************************/
852 #ifdef MCSSerialProbe
853 static int mos7840_serial_probe(struct usb_serial *serial,
854 const struct usb_device_id *id)
855 {
856
857 /*need to implement the mode_reg reading and updating\
858 structures usb_serial_ device_type\
859 (i.e num_ports, num_bulkin,bulkout etc) */
860 /* Also we can update the changes attach */
861 return 1;
862 }
863 #endif
864
865 /*****************************************************************************
866 * mos7840_open
867 * this function is called by the tty driver when a port is opened
868 * If successful, we return 0
869 * Otherwise we return a negative error number.
870 *****************************************************************************/
871
872 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
873 {
874 int response;
875 int j;
876 struct usb_serial *serial;
877 struct urb *urb;
878 __u16 Data;
879 int status;
880 struct moschip_port *mos7840_port;
881 struct moschip_port *port0;
882
883 dbg ("%s enter", __func__);
884
885 if (mos7840_port_paranoia_check(port, __func__)) {
886 dbg("%s", "Port Paranoia failed");
887 return -ENODEV;
888 }
889
890 serial = port->serial;
891
892 if (mos7840_serial_paranoia_check(serial, __func__)) {
893 dbg("%s", "Serial Paranoia failed");
894 return -ENODEV;
895 }
896
897 mos7840_port = mos7840_get_port_private(port);
898 port0 = mos7840_get_port_private(serial->port[0]);
899
900 if (mos7840_port == NULL || port0 == NULL)
901 return -ENODEV;
902
903 usb_clear_halt(serial->dev, port->write_urb->pipe);
904 usb_clear_halt(serial->dev, port->read_urb->pipe);
905 port0->open_ports++;
906
907 /* Initialising the write urb pool */
908 for (j = 0; j < NUM_URBS; ++j) {
909 urb = usb_alloc_urb(0, GFP_KERNEL);
910 mos7840_port->write_urb_pool[j] = urb;
911
912 if (urb == NULL) {
913 dev_err(&port->dev, "No more urbs???\n");
914 continue;
915 }
916
917 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
918 GFP_KERNEL);
919 if (!urb->transfer_buffer) {
920 usb_free_urb(urb);
921 mos7840_port->write_urb_pool[j] = NULL;
922 dev_err(&port->dev,
923 "%s-out of memory for urb buffers.\n",
924 __func__);
925 continue;
926 }
927 }
928
929 /*****************************************************************************
930 * Initialize MCS7840 -- Write Init values to corresponding Registers
931 *
932 * Register Index
933 * 1 : IER
934 * 2 : FCR
935 * 3 : LCR
936 * 4 : MCR
937 *
938 * 0x08 : SP1/2 Control Reg
939 *****************************************************************************/
940
941 /* NEED to check the following Block */
942
943 Data = 0x0;
944 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
945 if (status < 0) {
946 dbg("Reading Spreg failed");
947 return -1;
948 }
949 Data |= 0x80;
950 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
951 if (status < 0) {
952 dbg("writing Spreg failed");
953 return -1;
954 }
955
956 Data &= ~0x80;
957 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
958 if (status < 0) {
959 dbg("writing Spreg failed");
960 return -1;
961 }
962 /* End of block to be checked */
963
964 Data = 0x0;
965 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
966 &Data);
967 if (status < 0) {
968 dbg("Reading Controlreg failed");
969 return -1;
970 }
971 Data |= 0x08; /* Driver done bit */
972 Data |= 0x20; /* rx_disable */
973 status = mos7840_set_reg_sync(port,
974 mos7840_port->ControlRegOffset, Data);
975 if (status < 0) {
976 dbg("writing Controlreg failed");
977 return -1;
978 }
979 /* do register settings here */
980 /* Set all regs to the device default values. */
981 /***********************************
982 * First Disable all interrupts.
983 ***********************************/
984 Data = 0x00;
985 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
986 if (status < 0) {
987 dbg("disabling interrupts failed");
988 return -1;
989 }
990 /* Set FIFO_CONTROL_REGISTER to the default value */
991 Data = 0x00;
992 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
993 if (status < 0) {
994 dbg("Writing FIFO_CONTROL_REGISTER failed");
995 return -1;
996 }
997
998 Data = 0xcf;
999 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1000 if (status < 0) {
1001 dbg("Writing FIFO_CONTROL_REGISTER failed");
1002 return -1;
1003 }
1004
1005 Data = 0x03;
1006 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1007 mos7840_port->shadowLCR = Data;
1008
1009 Data = 0x0b;
1010 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1011 mos7840_port->shadowMCR = Data;
1012
1013 Data = 0x00;
1014 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1015 mos7840_port->shadowLCR = Data;
1016
1017 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1018 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1019
1020 Data = 0x0c;
1021 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1022
1023 Data = 0x0;
1024 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1025
1026 Data = 0x00;
1027 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1028
1029 Data = Data & ~SERIAL_LCR_DLAB;
1030 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1031 mos7840_port->shadowLCR = Data;
1032
1033 /* clearing Bulkin and Bulkout Fifo */
1034 Data = 0x0;
1035 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1036
1037 Data = Data | 0x0c;
1038 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1039
1040 Data = Data & ~0x0c;
1041 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1042 /* Finally enable all interrupts */
1043 Data = 0x0c;
1044 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1045
1046 /* clearing rx_disable */
1047 Data = 0x0;
1048 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1049 &Data);
1050 Data = Data & ~0x20;
1051 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1052 Data);
1053
1054 /* rx_negate */
1055 Data = 0x0;
1056 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1057 &Data);
1058 Data = Data | 0x10;
1059 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1060 Data);
1061
1062 /* Check to see if we've set up our endpoint info yet *
1063 * (can't set it up in mos7840_startup as the structures *
1064 * were not set up at that time.) */
1065 if (port0->open_ports == 1) {
1066 if (serial->port[0]->interrupt_in_buffer == NULL) {
1067 /* set up interrupt urb */
1068 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1069 serial->dev,
1070 usb_rcvintpipe(serial->dev,
1071 serial->port[0]->interrupt_in_endpointAddress),
1072 serial->port[0]->interrupt_in_buffer,
1073 serial->port[0]->interrupt_in_urb->
1074 transfer_buffer_length,
1075 mos7840_interrupt_callback,
1076 serial,
1077 serial->port[0]->interrupt_in_urb->interval);
1078
1079 /* start interrupt read for mos7840 *
1080 * will continue as long as mos7840 is connected */
1081
1082 response =
1083 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1084 GFP_KERNEL);
1085 if (response) {
1086 dev_err(&port->dev, "%s - Error %d submitting "
1087 "interrupt urb\n", __func__, response);
1088 }
1089
1090 }
1091
1092 }
1093
1094 /* see if we've set up our endpoint info yet *
1095 * (can't set it up in mos7840_startup as the *
1096 * structures were not set up at that time.) */
1097
1098 dbg("port number is %d", port->number);
1099 dbg("serial number is %d", port->serial->minor);
1100 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
1101 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
1102 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
1103 dbg("port's number in the device is %d", mos7840_port->port_num);
1104 mos7840_port->read_urb = port->read_urb;
1105
1106 /* set up our bulk in urb */
1107 if ((serial->num_ports == 2)
1108 && ((((__u16)port->number -
1109 (__u16)(port->serial->minor)) % 2) != 0)) {
1110 usb_fill_bulk_urb(mos7840_port->read_urb,
1111 serial->dev,
1112 usb_rcvbulkpipe(serial->dev,
1113 (port->bulk_in_endpointAddress) + 2),
1114 port->bulk_in_buffer,
1115 mos7840_port->read_urb->transfer_buffer_length,
1116 mos7840_bulk_in_callback, mos7840_port);
1117 } else {
1118 usb_fill_bulk_urb(mos7840_port->read_urb,
1119 serial->dev,
1120 usb_rcvbulkpipe(serial->dev,
1121 port->bulk_in_endpointAddress),
1122 port->bulk_in_buffer,
1123 mos7840_port->read_urb->transfer_buffer_length,
1124 mos7840_bulk_in_callback, mos7840_port);
1125 }
1126
1127 dbg("mos7840_open: bulkin endpoint is %d",
1128 port->bulk_in_endpointAddress);
1129 mos7840_port->read_urb_busy = true;
1130 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1131 if (response) {
1132 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1133 __func__, response);
1134 mos7840_port->read_urb_busy = false;
1135 }
1136
1137 /* initialize our wait queues */
1138 init_waitqueue_head(&mos7840_port->wait_chase);
1139 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1140
1141 /* initialize our icount structure */
1142 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1143
1144 /* initialize our port settings */
1145 /* Must set to enable ints! */
1146 mos7840_port->shadowMCR = MCR_MASTER_IE;
1147 /* send a open port command */
1148 mos7840_port->open = 1;
1149 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1150 mos7840_port->icount.tx = 0;
1151 mos7840_port->icount.rx = 0;
1152
1153 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1154 serial, mos7840_port, port);
1155
1156 dbg ("%s leave", __func__);
1157
1158 return 0;
1159
1160 }
1161
1162 /*****************************************************************************
1163 * mos7840_chars_in_buffer
1164 * this function is called by the tty driver when it wants to know how many
1165 * bytes of data we currently have outstanding in the port (data that has
1166 * been written, but hasn't made it out the port yet)
1167 * If successful, we return the number of bytes left to be written in the
1168 * system,
1169 * Otherwise we return zero.
1170 *****************************************************************************/
1171
1172 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1173 {
1174 struct usb_serial_port *port = tty->driver_data;
1175 int i;
1176 int chars = 0;
1177 unsigned long flags;
1178 struct moschip_port *mos7840_port;
1179
1180 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
1181
1182 if (mos7840_port_paranoia_check(port, __func__)) {
1183 dbg("%s", "Invalid port");
1184 return 0;
1185 }
1186
1187 mos7840_port = mos7840_get_port_private(port);
1188 if (mos7840_port == NULL) {
1189 dbg("%s", "mos7840_break:leaving ...........");
1190 return 0;
1191 }
1192
1193 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1194 for (i = 0; i < NUM_URBS; ++i)
1195 if (mos7840_port->busy[i])
1196 chars += URB_TRANSFER_BUFFER_SIZE;
1197 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1198 dbg("%s - returns %d", __func__, chars);
1199 return chars;
1200
1201 }
1202
1203 /*****************************************************************************
1204 * mos7840_close
1205 * this function is called by the tty driver when a port is closed
1206 *****************************************************************************/
1207
1208 static void mos7840_close(struct usb_serial_port *port)
1209 {
1210 struct usb_serial *serial;
1211 struct moschip_port *mos7840_port;
1212 struct moschip_port *port0;
1213 int j;
1214 __u16 Data;
1215
1216 dbg("%s", "mos7840_close:entering...");
1217
1218 if (mos7840_port_paranoia_check(port, __func__)) {
1219 dbg("%s", "Port Paranoia failed");
1220 return;
1221 }
1222
1223 serial = mos7840_get_usb_serial(port, __func__);
1224 if (!serial) {
1225 dbg("%s", "Serial Paranoia failed");
1226 return;
1227 }
1228
1229 mos7840_port = mos7840_get_port_private(port);
1230 port0 = mos7840_get_port_private(serial->port[0]);
1231
1232 if (mos7840_port == NULL || port0 == NULL)
1233 return;
1234
1235 for (j = 0; j < NUM_URBS; ++j)
1236 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1237
1238 /* Freeing Write URBs */
1239 for (j = 0; j < NUM_URBS; ++j) {
1240 if (mos7840_port->write_urb_pool[j]) {
1241 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1242 kfree(mos7840_port->write_urb_pool[j]->
1243 transfer_buffer);
1244
1245 usb_free_urb(mos7840_port->write_urb_pool[j]);
1246 }
1247 }
1248
1249 /* While closing port, shutdown all bulk read, write *
1250 * and interrupt read if they exists */
1251 if (serial->dev) {
1252 if (mos7840_port->write_urb) {
1253 dbg("%s", "Shutdown bulk write");
1254 usb_kill_urb(mos7840_port->write_urb);
1255 }
1256 if (mos7840_port->read_urb) {
1257 dbg("%s", "Shutdown bulk read");
1258 usb_kill_urb(mos7840_port->read_urb);
1259 mos7840_port->read_urb_busy = false;
1260 }
1261 if ((&mos7840_port->control_urb)) {
1262 dbg("%s", "Shutdown control read");
1263 /*/ usb_kill_urb (mos7840_port->control_urb); */
1264 }
1265 }
1266 /* if(mos7840_port->ctrl_buf != NULL) */
1267 /* kfree(mos7840_port->ctrl_buf); */
1268 port0->open_ports--;
1269 dbg("mos7840_num_open_ports in close%d:in port%d",
1270 port0->open_ports, port->number);
1271 if (port0->open_ports == 0) {
1272 if (serial->port[0]->interrupt_in_urb) {
1273 dbg("%s", "Shutdown interrupt_in_urb");
1274 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1275 }
1276 }
1277
1278 if (mos7840_port->write_urb) {
1279 /* if this urb had a transfer buffer already (old tx) free it */
1280 if (mos7840_port->write_urb->transfer_buffer != NULL)
1281 kfree(mos7840_port->write_urb->transfer_buffer);
1282 usb_free_urb(mos7840_port->write_urb);
1283 }
1284
1285 Data = 0x0;
1286 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1287
1288 Data = 0x00;
1289 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1290
1291 mos7840_port->open = 0;
1292
1293 dbg("%s", "Leaving ............");
1294 }
1295
1296 /************************************************************************
1297 *
1298 * mos7840_block_until_chase_response
1299 *
1300 * This function will block the close until one of the following:
1301 * 1. Response to our Chase comes from mos7840
1302 * 2. A timeout of 10 seconds without activity has expired
1303 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1304 *
1305 ************************************************************************/
1306
1307 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1308 struct moschip_port *mos7840_port)
1309 {
1310 int timeout = 1 * HZ;
1311 int wait = 10;
1312 int count;
1313
1314 while (1) {
1315 count = mos7840_chars_in_buffer(tty);
1316
1317 /* Check for Buffer status */
1318 if (count <= 0)
1319 return;
1320
1321 /* Block the thread for a while */
1322 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1323 timeout);
1324 /* No activity.. count down section */
1325 wait--;
1326 if (wait == 0) {
1327 dbg("%s - TIMEOUT", __func__);
1328 return;
1329 } else {
1330 /* Reset timeout value back to seconds */
1331 wait = 10;
1332 }
1333 }
1334
1335 }
1336
1337 /*****************************************************************************
1338 * mos7840_break
1339 * this function sends a break to the port
1340 *****************************************************************************/
1341 static void mos7840_break(struct tty_struct *tty, int break_state)
1342 {
1343 struct usb_serial_port *port = tty->driver_data;
1344 unsigned char data;
1345 struct usb_serial *serial;
1346 struct moschip_port *mos7840_port;
1347
1348 dbg("%s", "Entering ...........");
1349 dbg("mos7840_break: Start");
1350
1351 if (mos7840_port_paranoia_check(port, __func__)) {
1352 dbg("%s", "Port Paranoia failed");
1353 return;
1354 }
1355
1356 serial = mos7840_get_usb_serial(port, __func__);
1357 if (!serial) {
1358 dbg("%s", "Serial Paranoia failed");
1359 return;
1360 }
1361
1362 mos7840_port = mos7840_get_port_private(port);
1363
1364 if (mos7840_port == NULL)
1365 return;
1366
1367 if (serial->dev)
1368 /* flush and block until tx is empty */
1369 mos7840_block_until_chase_response(tty, mos7840_port);
1370
1371 if (break_state == -1)
1372 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1373 else
1374 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1375
1376 /* FIXME: no locking on shadowLCR anywhere in driver */
1377 mos7840_port->shadowLCR = data;
1378 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1379 mos7840_port->shadowLCR);
1380 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1381 mos7840_port->shadowLCR);
1382 }
1383
1384 /*****************************************************************************
1385 * mos7840_write_room
1386 * this function is called by the tty driver when it wants to know how many
1387 * bytes of data we can accept for a specific port.
1388 * If successful, we return the amount of room that we have for this port
1389 * Otherwise we return a negative error number.
1390 *****************************************************************************/
1391
1392 static int mos7840_write_room(struct tty_struct *tty)
1393 {
1394 struct usb_serial_port *port = tty->driver_data;
1395 int i;
1396 int room = 0;
1397 unsigned long flags;
1398 struct moschip_port *mos7840_port;
1399
1400 dbg("%s", " mos7840_write_room:entering ...........");
1401
1402 if (mos7840_port_paranoia_check(port, __func__)) {
1403 dbg("%s", "Invalid port");
1404 dbg("%s", " mos7840_write_room:leaving ...........");
1405 return -1;
1406 }
1407
1408 mos7840_port = mos7840_get_port_private(port);
1409 if (mos7840_port == NULL) {
1410 dbg("%s", "mos7840_break:leaving ...........");
1411 return -1;
1412 }
1413
1414 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1415 for (i = 0; i < NUM_URBS; ++i) {
1416 if (!mos7840_port->busy[i])
1417 room += URB_TRANSFER_BUFFER_SIZE;
1418 }
1419 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1420
1421 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1422 dbg("%s - returns %d", __func__, room);
1423 return room;
1424
1425 }
1426
1427 /*****************************************************************************
1428 * mos7840_write
1429 * this function is called by the tty driver when data should be written to
1430 * the port.
1431 * If successful, we return the number of bytes written, otherwise we
1432 * return a negative error number.
1433 *****************************************************************************/
1434
1435 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1436 const unsigned char *data, int count)
1437 {
1438 int status;
1439 int i;
1440 int bytes_sent = 0;
1441 int transfer_size;
1442 unsigned long flags;
1443
1444 struct moschip_port *mos7840_port;
1445 struct usb_serial *serial;
1446 struct urb *urb;
1447 /* __u16 Data; */
1448 const unsigned char *current_position = data;
1449 unsigned char *data1;
1450 dbg("%s", "entering ...........");
1451 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1452 mos7840_port->shadowLCR); */
1453
1454 #ifdef NOTMOS7840
1455 Data = 0x00;
1456 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1457 mos7840_port->shadowLCR = Data;
1458 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
1459 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1460 mos7840_port->shadowLCR);
1461
1462 /* Data = 0x03; */
1463 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1464 /* mos7840_port->shadowLCR=Data;//Need to add later */
1465
1466 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1467 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1468
1469 /* Data = 0x0c; */
1470 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1471 Data = 0x00;
1472 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1473 dbg("mos7840_write:DLL value is %x", Data);
1474
1475 Data = 0x0;
1476 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1477 dbg("mos7840_write:DLM value is %x", Data);
1478
1479 Data = Data & ~SERIAL_LCR_DLAB;
1480 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1481 mos7840_port->shadowLCR);
1482 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1483 #endif
1484
1485 if (mos7840_port_paranoia_check(port, __func__)) {
1486 dbg("%s", "Port Paranoia failed");
1487 return -1;
1488 }
1489
1490 serial = port->serial;
1491 if (mos7840_serial_paranoia_check(serial, __func__)) {
1492 dbg("%s", "Serial Paranoia failed");
1493 return -1;
1494 }
1495
1496 mos7840_port = mos7840_get_port_private(port);
1497 if (mos7840_port == NULL) {
1498 dbg("%s", "mos7840_port is NULL");
1499 return -1;
1500 }
1501
1502 /* try to find a free urb in the list */
1503 urb = NULL;
1504
1505 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1506 for (i = 0; i < NUM_URBS; ++i) {
1507 if (!mos7840_port->busy[i]) {
1508 mos7840_port->busy[i] = 1;
1509 urb = mos7840_port->write_urb_pool[i];
1510 dbg("URB:%d", i);
1511 break;
1512 }
1513 }
1514 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1515
1516 if (urb == NULL) {
1517 dbg("%s - no more free urbs", __func__);
1518 goto exit;
1519 }
1520
1521 if (urb->transfer_buffer == NULL) {
1522 urb->transfer_buffer =
1523 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1524
1525 if (urb->transfer_buffer == NULL) {
1526 dev_err(&port->dev, "%s no more kernel memory...\n",
1527 __func__);
1528 goto exit;
1529 }
1530 }
1531 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1532
1533 memcpy(urb->transfer_buffer, current_position, transfer_size);
1534
1535 /* fill urb with data and submit */
1536 if ((serial->num_ports == 2)
1537 && ((((__u16)port->number -
1538 (__u16)(port->serial->minor)) % 2) != 0)) {
1539 usb_fill_bulk_urb(urb,
1540 serial->dev,
1541 usb_sndbulkpipe(serial->dev,
1542 (port->bulk_out_endpointAddress) + 2),
1543 urb->transfer_buffer,
1544 transfer_size,
1545 mos7840_bulk_out_data_callback, mos7840_port);
1546 } else {
1547 usb_fill_bulk_urb(urb,
1548 serial->dev,
1549 usb_sndbulkpipe(serial->dev,
1550 port->bulk_out_endpointAddress),
1551 urb->transfer_buffer,
1552 transfer_size,
1553 mos7840_bulk_out_data_callback, mos7840_port);
1554 }
1555
1556 data1 = urb->transfer_buffer;
1557 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
1558
1559 /* send it down the pipe */
1560 status = usb_submit_urb(urb, GFP_ATOMIC);
1561
1562 if (status) {
1563 mos7840_port->busy[i] = 0;
1564 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1565 "with status = %d\n", __func__, status);
1566 bytes_sent = status;
1567 goto exit;
1568 }
1569 bytes_sent = transfer_size;
1570 mos7840_port->icount.tx += transfer_size;
1571 smp_wmb();
1572 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
1573 exit:
1574 return bytes_sent;
1575
1576 }
1577
1578 /*****************************************************************************
1579 * mos7840_throttle
1580 * this function is called by the tty driver when it wants to stop the data
1581 * being read from the port.
1582 *****************************************************************************/
1583
1584 static void mos7840_throttle(struct tty_struct *tty)
1585 {
1586 struct usb_serial_port *port = tty->driver_data;
1587 struct moschip_port *mos7840_port;
1588 int status;
1589
1590 if (mos7840_port_paranoia_check(port, __func__)) {
1591 dbg("%s", "Invalid port");
1592 return;
1593 }
1594
1595 dbg("- port %d", port->number);
1596
1597 mos7840_port = mos7840_get_port_private(port);
1598
1599 if (mos7840_port == NULL)
1600 return;
1601
1602 if (!mos7840_port->open) {
1603 dbg("%s", "port not opened");
1604 return;
1605 }
1606
1607 dbg("%s", "Entering ..........");
1608
1609 /* if we are implementing XON/XOFF, send the stop character */
1610 if (I_IXOFF(tty)) {
1611 unsigned char stop_char = STOP_CHAR(tty);
1612 status = mos7840_write(tty, port, &stop_char, 1);
1613 if (status <= 0)
1614 return;
1615 }
1616 /* if we are implementing RTS/CTS, toggle that line */
1617 if (tty->termios->c_cflag & CRTSCTS) {
1618 mos7840_port->shadowMCR &= ~MCR_RTS;
1619 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1620 mos7840_port->shadowMCR);
1621 if (status < 0)
1622 return;
1623 }
1624 }
1625
1626 /*****************************************************************************
1627 * mos7840_unthrottle
1628 * this function is called by the tty driver when it wants to resume
1629 * the data being read from the port (called after mos7840_throttle is
1630 * called)
1631 *****************************************************************************/
1632 static void mos7840_unthrottle(struct tty_struct *tty)
1633 {
1634 struct usb_serial_port *port = tty->driver_data;
1635 int status;
1636 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1637
1638 if (mos7840_port_paranoia_check(port, __func__)) {
1639 dbg("%s", "Invalid port");
1640 return;
1641 }
1642
1643 if (mos7840_port == NULL)
1644 return;
1645
1646 if (!mos7840_port->open) {
1647 dbg("%s - port not opened", __func__);
1648 return;
1649 }
1650
1651 dbg("%s", "Entering ..........");
1652
1653 /* if we are implementing XON/XOFF, send the start character */
1654 if (I_IXOFF(tty)) {
1655 unsigned char start_char = START_CHAR(tty);
1656 status = mos7840_write(tty, port, &start_char, 1);
1657 if (status <= 0)
1658 return;
1659 }
1660
1661 /* if we are implementing RTS/CTS, toggle that line */
1662 if (tty->termios->c_cflag & CRTSCTS) {
1663 mos7840_port->shadowMCR |= MCR_RTS;
1664 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1665 mos7840_port->shadowMCR);
1666 if (status < 0)
1667 return;
1668 }
1669 }
1670
1671 static int mos7840_tiocmget(struct tty_struct *tty)
1672 {
1673 struct usb_serial_port *port = tty->driver_data;
1674 struct moschip_port *mos7840_port;
1675 unsigned int result;
1676 __u16 msr;
1677 __u16 mcr;
1678 int status;
1679 mos7840_port = mos7840_get_port_private(port);
1680
1681 dbg("%s - port %d", __func__, port->number);
1682
1683 if (mos7840_port == NULL)
1684 return -ENODEV;
1685
1686 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1687 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1688 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1689 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1690 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1691 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1692 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1693 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1694 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1695
1696 dbg("%s - 0x%04X", __func__, result);
1697
1698 return result;
1699 }
1700
1701 static int mos7840_tiocmset(struct tty_struct *tty,
1702 unsigned int set, unsigned int clear)
1703 {
1704 struct usb_serial_port *port = tty->driver_data;
1705 struct moschip_port *mos7840_port;
1706 unsigned int mcr;
1707 int status;
1708
1709 dbg("%s - port %d", __func__, port->number);
1710
1711 mos7840_port = mos7840_get_port_private(port);
1712
1713 if (mos7840_port == NULL)
1714 return -ENODEV;
1715
1716 /* FIXME: What locks the port registers ? */
1717 mcr = mos7840_port->shadowMCR;
1718 if (clear & TIOCM_RTS)
1719 mcr &= ~MCR_RTS;
1720 if (clear & TIOCM_DTR)
1721 mcr &= ~MCR_DTR;
1722 if (clear & TIOCM_LOOP)
1723 mcr &= ~MCR_LOOPBACK;
1724
1725 if (set & TIOCM_RTS)
1726 mcr |= MCR_RTS;
1727 if (set & TIOCM_DTR)
1728 mcr |= MCR_DTR;
1729 if (set & TIOCM_LOOP)
1730 mcr |= MCR_LOOPBACK;
1731
1732 mos7840_port->shadowMCR = mcr;
1733
1734 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1735 if (status < 0) {
1736 dbg("setting MODEM_CONTROL_REGISTER Failed");
1737 return status;
1738 }
1739
1740 return 0;
1741 }
1742
1743 /*****************************************************************************
1744 * mos7840_calc_baud_rate_divisor
1745 * this function calculates the proper baud rate divisor for the specified
1746 * baud rate.
1747 *****************************************************************************/
1748 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1749 __u16 *clk_sel_val)
1750 {
1751
1752 dbg("%s - %d", __func__, baudRate);
1753
1754 if (baudRate <= 115200) {
1755 *divisor = 115200 / baudRate;
1756 *clk_sel_val = 0x0;
1757 }
1758 if ((baudRate > 115200) && (baudRate <= 230400)) {
1759 *divisor = 230400 / baudRate;
1760 *clk_sel_val = 0x10;
1761 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1762 *divisor = 403200 / baudRate;
1763 *clk_sel_val = 0x20;
1764 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1765 *divisor = 460800 / baudRate;
1766 *clk_sel_val = 0x30;
1767 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1768 *divisor = 806400 / baudRate;
1769 *clk_sel_val = 0x40;
1770 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1771 *divisor = 921600 / baudRate;
1772 *clk_sel_val = 0x50;
1773 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1774 *divisor = 1572864 / baudRate;
1775 *clk_sel_val = 0x60;
1776 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1777 *divisor = 3145728 / baudRate;
1778 *clk_sel_val = 0x70;
1779 }
1780 return 0;
1781
1782 #ifdef NOTMCS7840
1783
1784 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1785 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1786 *divisor = mos7840_divisor_table[i].Divisor;
1787 return 0;
1788 }
1789 }
1790
1791 /* After trying for all the standard baud rates *
1792 * Try calculating the divisor for this baud rate */
1793
1794 if (baudrate > 75 && baudrate < 230400) {
1795 /* get the divisor */
1796 custom = (__u16) (230400L / baudrate);
1797
1798 /* Check for round off */
1799 round1 = (__u16) (2304000L / baudrate);
1800 round = (__u16) (round1 - (custom * 10));
1801 if (round > 4)
1802 custom++;
1803 *divisor = custom;
1804
1805 dbg(" Baud %d = %d", baudrate, custom);
1806 return 0;
1807 }
1808
1809 dbg("%s", " Baud calculation Failed...");
1810 return -1;
1811 #endif
1812 }
1813
1814 /*****************************************************************************
1815 * mos7840_send_cmd_write_baud_rate
1816 * this function sends the proper command to change the baud rate of the
1817 * specified port.
1818 *****************************************************************************/
1819
1820 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1821 int baudRate)
1822 {
1823 int divisor = 0;
1824 int status;
1825 __u16 Data;
1826 unsigned char number;
1827 __u16 clk_sel_val;
1828 struct usb_serial_port *port;
1829
1830 if (mos7840_port == NULL)
1831 return -1;
1832
1833 port = (struct usb_serial_port *)mos7840_port->port;
1834 if (mos7840_port_paranoia_check(port, __func__)) {
1835 dbg("%s", "Invalid port");
1836 return -1;
1837 }
1838
1839 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1840 dbg("%s", "Invalid Serial");
1841 return -1;
1842 }
1843
1844 dbg("%s", "Entering ..........");
1845
1846 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1847
1848 dbg("%s - port = %d, baud = %d", __func__,
1849 mos7840_port->port->number, baudRate);
1850 /* reset clk_uart_sel in spregOffset */
1851 if (baudRate > 115200) {
1852 #ifdef HW_flow_control
1853 /* NOTE: need to see the pther register to modify */
1854 /* setting h/w flow control bit to 1 */
1855 Data = 0x2b;
1856 mos7840_port->shadowMCR = Data;
1857 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1858 Data);
1859 if (status < 0) {
1860 dbg("Writing spreg failed in set_serial_baud");
1861 return -1;
1862 }
1863 #endif
1864
1865 } else {
1866 #ifdef HW_flow_control
1867 /* setting h/w flow control bit to 0 */
1868 Data = 0xb;
1869 mos7840_port->shadowMCR = Data;
1870 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1871 Data);
1872 if (status < 0) {
1873 dbg("Writing spreg failed in set_serial_baud");
1874 return -1;
1875 }
1876 #endif
1877
1878 }
1879
1880 if (1) { /* baudRate <= 115200) */
1881 clk_sel_val = 0x0;
1882 Data = 0x0;
1883 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1884 &clk_sel_val);
1885 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1886 &Data);
1887 if (status < 0) {
1888 dbg("reading spreg failed in set_serial_baud");
1889 return -1;
1890 }
1891 Data = (Data & 0x8f) | clk_sel_val;
1892 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1893 Data);
1894 if (status < 0) {
1895 dbg("Writing spreg failed in set_serial_baud");
1896 return -1;
1897 }
1898 /* Calculate the Divisor */
1899
1900 if (status) {
1901 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1902 return status;
1903 }
1904 /* Enable access to divisor latch */
1905 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1906 mos7840_port->shadowLCR = Data;
1907 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1908
1909 /* Write the divisor */
1910 Data = (unsigned char)(divisor & 0xff);
1911 dbg("set_serial_baud Value to write DLL is %x", Data);
1912 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1913
1914 Data = (unsigned char)((divisor & 0xff00) >> 8);
1915 dbg("set_serial_baud Value to write DLM is %x", Data);
1916 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1917
1918 /* Disable access to divisor latch */
1919 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1920 mos7840_port->shadowLCR = Data;
1921 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1922
1923 }
1924 return status;
1925 }
1926
1927 /*****************************************************************************
1928 * mos7840_change_port_settings
1929 * This routine is called to set the UART on the device to match
1930 * the specified new settings.
1931 *****************************************************************************/
1932
1933 static void mos7840_change_port_settings(struct tty_struct *tty,
1934 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1935 {
1936 int baud;
1937 unsigned cflag;
1938 unsigned iflag;
1939 __u8 lData;
1940 __u8 lParity;
1941 __u8 lStop;
1942 int status;
1943 __u16 Data;
1944 struct usb_serial_port *port;
1945 struct usb_serial *serial;
1946
1947 if (mos7840_port == NULL)
1948 return;
1949
1950 port = (struct usb_serial_port *)mos7840_port->port;
1951
1952 if (mos7840_port_paranoia_check(port, __func__)) {
1953 dbg("%s", "Invalid port");
1954 return;
1955 }
1956
1957 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1958 dbg("%s", "Invalid Serial");
1959 return;
1960 }
1961
1962 serial = port->serial;
1963
1964 dbg("%s - port %d", __func__, mos7840_port->port->number);
1965
1966 if (!mos7840_port->open) {
1967 dbg("%s - port not opened", __func__);
1968 return;
1969 }
1970
1971 dbg("%s", "Entering ..........");
1972
1973 lData = LCR_BITS_8;
1974 lStop = LCR_STOP_1;
1975 lParity = LCR_PAR_NONE;
1976
1977 cflag = tty->termios->c_cflag;
1978 iflag = tty->termios->c_iflag;
1979
1980 /* Change the number of bits */
1981 if (cflag & CSIZE) {
1982 switch (cflag & CSIZE) {
1983 case CS5:
1984 lData = LCR_BITS_5;
1985 break;
1986
1987 case CS6:
1988 lData = LCR_BITS_6;
1989 break;
1990
1991 case CS7:
1992 lData = LCR_BITS_7;
1993 break;
1994 default:
1995 case CS8:
1996 lData = LCR_BITS_8;
1997 break;
1998 }
1999 }
2000 /* Change the Parity bit */
2001 if (cflag & PARENB) {
2002 if (cflag & PARODD) {
2003 lParity = LCR_PAR_ODD;
2004 dbg("%s - parity = odd", __func__);
2005 } else {
2006 lParity = LCR_PAR_EVEN;
2007 dbg("%s - parity = even", __func__);
2008 }
2009
2010 } else {
2011 dbg("%s - parity = none", __func__);
2012 }
2013
2014 if (cflag & CMSPAR)
2015 lParity = lParity | 0x20;
2016
2017 /* Change the Stop bit */
2018 if (cflag & CSTOPB) {
2019 lStop = LCR_STOP_2;
2020 dbg("%s - stop bits = 2", __func__);
2021 } else {
2022 lStop = LCR_STOP_1;
2023 dbg("%s - stop bits = 1", __func__);
2024 }
2025
2026 /* Update the LCR with the correct value */
2027 mos7840_port->shadowLCR &=
2028 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2029 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2030
2031 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
2032 mos7840_port->shadowLCR);
2033 /* Disable Interrupts */
2034 Data = 0x00;
2035 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2036
2037 Data = 0x00;
2038 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2039
2040 Data = 0xcf;
2041 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2042
2043 /* Send the updated LCR value to the mos7840 */
2044 Data = mos7840_port->shadowLCR;
2045
2046 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2047
2048 Data = 0x00b;
2049 mos7840_port->shadowMCR = Data;
2050 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2051 Data = 0x00b;
2052 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2053
2054 /* set up the MCR register and send it to the mos7840 */
2055
2056 mos7840_port->shadowMCR = MCR_MASTER_IE;
2057 if (cflag & CBAUD)
2058 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2059
2060 if (cflag & CRTSCTS)
2061 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2062 else
2063 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2064
2065 Data = mos7840_port->shadowMCR;
2066 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2067
2068 /* Determine divisor based on baud rate */
2069 baud = tty_get_baud_rate(tty);
2070
2071 if (!baud) {
2072 /* pick a default, any default... */
2073 dbg("%s", "Picked default baud...");
2074 baud = 9600;
2075 }
2076
2077 dbg("%s - baud rate = %d", __func__, baud);
2078 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2079
2080 /* Enable Interrupts */
2081 Data = 0x0c;
2082 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2083
2084 if (mos7840_port->read_urb_busy == false) {
2085 mos7840_port->read_urb->dev = serial->dev;
2086 mos7840_port->read_urb_busy = true;
2087 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2088 if (status) {
2089 dbg("usb_submit_urb(read bulk) failed, status = %d",
2090 status);
2091 mos7840_port->read_urb_busy = false;
2092 }
2093 }
2094 wake_up(&mos7840_port->delta_msr_wait);
2095 mos7840_port->delta_msr_cond = 1;
2096 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2097 mos7840_port->shadowLCR);
2098 }
2099
2100 /*****************************************************************************
2101 * mos7840_set_termios
2102 * this function is called by the tty driver when it wants to change
2103 * the termios structure
2104 *****************************************************************************/
2105
2106 static void mos7840_set_termios(struct tty_struct *tty,
2107 struct usb_serial_port *port,
2108 struct ktermios *old_termios)
2109 {
2110 int status;
2111 unsigned int cflag;
2112 struct usb_serial *serial;
2113 struct moschip_port *mos7840_port;
2114 dbg("mos7840_set_termios: START");
2115 if (mos7840_port_paranoia_check(port, __func__)) {
2116 dbg("%s", "Invalid port");
2117 return;
2118 }
2119
2120 serial = port->serial;
2121
2122 if (mos7840_serial_paranoia_check(serial, __func__)) {
2123 dbg("%s", "Invalid Serial");
2124 return;
2125 }
2126
2127 mos7840_port = mos7840_get_port_private(port);
2128
2129 if (mos7840_port == NULL)
2130 return;
2131
2132 if (!mos7840_port->open) {
2133 dbg("%s - port not opened", __func__);
2134 return;
2135 }
2136
2137 dbg("%s", "setting termios - ");
2138
2139 cflag = tty->termios->c_cflag;
2140
2141 dbg("%s - clfag %08x iflag %08x", __func__,
2142 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2143 dbg("%s - old clfag %08x old iflag %08x", __func__,
2144 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2145 dbg("%s - port %d", __func__, port->number);
2146
2147 /* change the port settings to the new ones specified */
2148
2149 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2150
2151 if (!mos7840_port->read_urb) {
2152 dbg("%s", "URB KILLED !!!!!");
2153 return;
2154 }
2155
2156 if (mos7840_port->read_urb_busy == false) {
2157 mos7840_port->read_urb->dev = serial->dev;
2158 mos7840_port->read_urb_busy = true;
2159 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2160 if (status) {
2161 dbg("usb_submit_urb(read bulk) failed, status = %d",
2162 status);
2163 mos7840_port->read_urb_busy = false;
2164 }
2165 }
2166 }
2167
2168 /*****************************************************************************
2169 * mos7840_get_lsr_info - get line status register info
2170 *
2171 * Purpose: Let user call ioctl() to get info when the UART physically
2172 * is emptied. On bus types like RS485, the transmitter must
2173 * release the bus after transmitting. This must be done when
2174 * the transmit shift register is empty, not be done when the
2175 * transmit holding register is empty. This functionality
2176 * allows an RS485 driver to be written in user space.
2177 *****************************************************************************/
2178
2179 static int mos7840_get_lsr_info(struct tty_struct *tty,
2180 unsigned int __user *value)
2181 {
2182 int count;
2183 unsigned int result = 0;
2184
2185 count = mos7840_chars_in_buffer(tty);
2186 if (count == 0) {
2187 dbg("%s -- Empty", __func__);
2188 result = TIOCSER_TEMT;
2189 }
2190
2191 if (copy_to_user(value, &result, sizeof(int)))
2192 return -EFAULT;
2193 return 0;
2194 }
2195
2196 /*****************************************************************************
2197 * mos7840_get_serial_info
2198 * function to get information about serial port
2199 *****************************************************************************/
2200
2201 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2202 struct serial_struct __user *retinfo)
2203 {
2204 struct serial_struct tmp;
2205
2206 if (mos7840_port == NULL)
2207 return -1;
2208
2209 if (!retinfo)
2210 return -EFAULT;
2211
2212 memset(&tmp, 0, sizeof(tmp));
2213
2214 tmp.type = PORT_16550A;
2215 tmp.line = mos7840_port->port->serial->minor;
2216 tmp.port = mos7840_port->port->number;
2217 tmp.irq = 0;
2218 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2219 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2220 tmp.baud_base = 9600;
2221 tmp.close_delay = 5 * HZ;
2222 tmp.closing_wait = 30 * HZ;
2223
2224 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2225 return -EFAULT;
2226 return 0;
2227 }
2228
2229 static int mos7840_get_icount(struct tty_struct *tty,
2230 struct serial_icounter_struct *icount)
2231 {
2232 struct usb_serial_port *port = tty->driver_data;
2233 struct moschip_port *mos7840_port;
2234 struct async_icount cnow;
2235
2236 mos7840_port = mos7840_get_port_private(port);
2237 cnow = mos7840_port->icount;
2238
2239 smp_rmb();
2240 icount->cts = cnow.cts;
2241 icount->dsr = cnow.dsr;
2242 icount->rng = cnow.rng;
2243 icount->dcd = cnow.dcd;
2244 icount->rx = cnow.rx;
2245 icount->tx = cnow.tx;
2246 icount->frame = cnow.frame;
2247 icount->overrun = cnow.overrun;
2248 icount->parity = cnow.parity;
2249 icount->brk = cnow.brk;
2250 icount->buf_overrun = cnow.buf_overrun;
2251
2252 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2253 port->number, icount->rx, icount->tx);
2254 return 0;
2255 }
2256
2257 /*****************************************************************************
2258 * SerialIoctl
2259 * this function handles any ioctl calls to the driver
2260 *****************************************************************************/
2261
2262 static int mos7840_ioctl(struct tty_struct *tty,
2263 unsigned int cmd, unsigned long arg)
2264 {
2265 struct usb_serial_port *port = tty->driver_data;
2266 void __user *argp = (void __user *)arg;
2267 struct moschip_port *mos7840_port;
2268
2269 struct async_icount cnow;
2270 struct async_icount cprev;
2271
2272 if (mos7840_port_paranoia_check(port, __func__)) {
2273 dbg("%s", "Invalid port");
2274 return -1;
2275 }
2276
2277 mos7840_port = mos7840_get_port_private(port);
2278
2279 if (mos7840_port == NULL)
2280 return -1;
2281
2282 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2283
2284 switch (cmd) {
2285 /* return number of bytes available */
2286
2287 case TIOCSERGETLSR:
2288 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
2289 return mos7840_get_lsr_info(tty, argp);
2290 return 0;
2291
2292 case TIOCGSERIAL:
2293 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
2294 return mos7840_get_serial_info(mos7840_port, argp);
2295
2296 case TIOCSSERIAL:
2297 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
2298 break;
2299
2300 case TIOCMIWAIT:
2301 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
2302 cprev = mos7840_port->icount;
2303 while (1) {
2304 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2305 mos7840_port->delta_msr_cond = 0;
2306 wait_event_interruptible(mos7840_port->delta_msr_wait,
2307 (mos7840_port->
2308 delta_msr_cond == 1));
2309
2310 /* see if a signal did it */
2311 if (signal_pending(current))
2312 return -ERESTARTSYS;
2313 cnow = mos7840_port->icount;
2314 smp_rmb();
2315 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2316 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2317 return -EIO; /* no change => error */
2318 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2319 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2320 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2321 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2322 return 0;
2323 }
2324 cprev = cnow;
2325 }
2326 /* NOTREACHED */
2327 break;
2328
2329 default:
2330 break;
2331 }
2332 return -ENOIOCTLCMD;
2333 }
2334
2335 static int mos7840_calc_num_ports(struct usb_serial *serial)
2336 {
2337 __u16 Data = 0x00;
2338 int ret = 0;
2339 int mos7840_num_ports;
2340
2341 ret = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2342 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &Data,
2343 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2344
2345 if ((Data & 0x01) == 0) {
2346 mos7840_num_ports = 2;
2347 serial->num_bulk_in = 2;
2348 serial->num_bulk_out = 2;
2349 serial->num_ports = 2;
2350 } else {
2351 mos7840_num_ports = 4;
2352 serial->num_bulk_in = 4;
2353 serial->num_bulk_out = 4;
2354 serial->num_ports = 4;
2355 }
2356
2357 return mos7840_num_ports;
2358 }
2359
2360 /****************************************************************************
2361 * mos7840_startup
2362 ****************************************************************************/
2363
2364 static int mos7840_startup(struct usb_serial *serial)
2365 {
2366 struct moschip_port *mos7840_port;
2367 struct usb_device *dev;
2368 int i, status;
2369
2370 __u16 Data;
2371 dbg("%s", "mos7840_startup :Entering..........");
2372
2373 if (!serial) {
2374 dbg("%s", "Invalid Handler");
2375 return -1;
2376 }
2377
2378 dev = serial->dev;
2379
2380 dbg("%s", "Entering...");
2381 dbg ("mos7840_startup: serial = %p", serial);
2382
2383 /* we set up the pointers to the endpoints in the mos7840_open *
2384 * function, as the structures aren't created yet. */
2385
2386 /* set up port private structures */
2387 for (i = 0; i < serial->num_ports; ++i) {
2388 dbg ("mos7840_startup: configuring port %d............", i);
2389 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2390 if (mos7840_port == NULL) {
2391 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
2392 status = -ENOMEM;
2393 i--; /* don't follow NULL pointer cleaning up */
2394 goto error;
2395 }
2396
2397 /* Initialize all port interrupt end point to port 0 int
2398 * endpoint. Our device has only one interrupt end point
2399 * common to all port */
2400
2401 mos7840_port->port = serial->port[i];
2402 mos7840_set_port_private(serial->port[i], mos7840_port);
2403 spin_lock_init(&mos7840_port->pool_lock);
2404
2405 /* minor is not initialised until later by
2406 * usb-serial.c:get_free_serial() and cannot therefore be used
2407 * to index device instances */
2408 mos7840_port->port_num = i + 1;
2409 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2410 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2411 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2412 dbg ("serial->minor = %d", serial->minor);
2413
2414 if (mos7840_port->port_num == 1) {
2415 mos7840_port->SpRegOffset = 0x0;
2416 mos7840_port->ControlRegOffset = 0x1;
2417 mos7840_port->DcrRegOffset = 0x4;
2418 } else if ((mos7840_port->port_num == 2)
2419 && (serial->num_ports == 4)) {
2420 mos7840_port->SpRegOffset = 0x8;
2421 mos7840_port->ControlRegOffset = 0x9;
2422 mos7840_port->DcrRegOffset = 0x16;
2423 } else if ((mos7840_port->port_num == 2)
2424 && (serial->num_ports == 2)) {
2425 mos7840_port->SpRegOffset = 0xa;
2426 mos7840_port->ControlRegOffset = 0xb;
2427 mos7840_port->DcrRegOffset = 0x19;
2428 } else if ((mos7840_port->port_num == 3)
2429 && (serial->num_ports == 4)) {
2430 mos7840_port->SpRegOffset = 0xa;
2431 mos7840_port->ControlRegOffset = 0xb;
2432 mos7840_port->DcrRegOffset = 0x19;
2433 } else if ((mos7840_port->port_num == 4)
2434 && (serial->num_ports == 4)) {
2435 mos7840_port->SpRegOffset = 0xc;
2436 mos7840_port->ControlRegOffset = 0xd;
2437 mos7840_port->DcrRegOffset = 0x1c;
2438 }
2439 mos7840_dump_serial_port(mos7840_port);
2440 mos7840_set_port_private(serial->port[i], mos7840_port);
2441
2442 /* enable rx_disable bit in control register */
2443 status = mos7840_get_reg_sync(serial->port[i],
2444 mos7840_port->ControlRegOffset, &Data);
2445 if (status < 0) {
2446 dbg("Reading ControlReg failed status-0x%x", status);
2447 break;
2448 } else
2449 dbg("ControlReg Reading success val is %x, status%d",
2450 Data, status);
2451 Data |= 0x08; /* setting driver done bit */
2452 Data |= 0x04; /* sp1_bit to have cts change reflect in
2453 modem status reg */
2454
2455 /* Data |= 0x20; //rx_disable bit */
2456 status = mos7840_set_reg_sync(serial->port[i],
2457 mos7840_port->ControlRegOffset, Data);
2458 if (status < 0) {
2459 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
2460 break;
2461 } else
2462 dbg("ControlReg Writing success(rx_disable) status%d",
2463 status);
2464
2465 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2466 and 0x24 in DCR3 */
2467 Data = 0x01;
2468 status = mos7840_set_reg_sync(serial->port[i],
2469 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2470 if (status < 0) {
2471 dbg("Writing DCR0 failed status-0x%x", status);
2472 break;
2473 } else
2474 dbg("DCR0 Writing success status%d", status);
2475
2476 Data = 0x05;
2477 status = mos7840_set_reg_sync(serial->port[i],
2478 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2479 if (status < 0) {
2480 dbg("Writing DCR1 failed status-0x%x", status);
2481 break;
2482 } else
2483 dbg("DCR1 Writing success status%d", status);
2484
2485 Data = 0x24;
2486 status = mos7840_set_reg_sync(serial->port[i],
2487 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2488 if (status < 0) {
2489 dbg("Writing DCR2 failed status-0x%x", status);
2490 break;
2491 } else
2492 dbg("DCR2 Writing success status%d", status);
2493
2494 /* write values in clkstart0x0 and clkmulti 0x20 */
2495 Data = 0x0;
2496 status = mos7840_set_reg_sync(serial->port[i],
2497 CLK_START_VALUE_REGISTER, Data);
2498 if (status < 0) {
2499 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
2500 break;
2501 } else
2502 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
2503
2504 Data = 0x20;
2505 status = mos7840_set_reg_sync(serial->port[i],
2506 CLK_MULTI_REGISTER, Data);
2507 if (status < 0) {
2508 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2509 status);
2510 goto error;
2511 } else
2512 dbg("CLK_MULTI_REGISTER Writing success status%d",
2513 status);
2514
2515 /* write value 0x0 to scratchpad register */
2516 Data = 0x00;
2517 status = mos7840_set_uart_reg(serial->port[i],
2518 SCRATCH_PAD_REGISTER, Data);
2519 if (status < 0) {
2520 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2521 status);
2522 break;
2523 } else
2524 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2525 status);
2526
2527 /* Zero Length flag register */
2528 if ((mos7840_port->port_num != 1)
2529 && (serial->num_ports == 2)) {
2530
2531 Data = 0xff;
2532 status = mos7840_set_reg_sync(serial->port[i],
2533 (__u16) (ZLP_REG1 +
2534 ((__u16)mos7840_port->port_num)), Data);
2535 dbg("ZLIP offset %x",
2536 (__u16) (ZLP_REG1 +
2537 ((__u16) mos7840_port->port_num)));
2538 if (status < 0) {
2539 dbg("Writing ZLP_REG%d failed status-0x%x",
2540 i + 2, status);
2541 break;
2542 } else
2543 dbg("ZLP_REG%d Writing success status%d",
2544 i + 2, status);
2545 } else {
2546 Data = 0xff;
2547 status = mos7840_set_reg_sync(serial->port[i],
2548 (__u16) (ZLP_REG1 +
2549 ((__u16)mos7840_port->port_num) - 0x1), Data);
2550 dbg("ZLIP offset %x",
2551 (__u16) (ZLP_REG1 +
2552 ((__u16) mos7840_port->port_num) - 0x1));
2553 if (status < 0) {
2554 dbg("Writing ZLP_REG%d failed status-0x%x",
2555 i + 1, status);
2556 break;
2557 } else
2558 dbg("ZLP_REG%d Writing success status%d",
2559 i + 1, status);
2560
2561 }
2562 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2563 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2564 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2565 GFP_KERNEL);
2566 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2567 !mos7840_port->dr) {
2568 status = -ENOMEM;
2569 goto error;
2570 }
2571 }
2572 dbg ("mos7840_startup: all ports configured...........");
2573
2574 /* Zero Length flag enable */
2575 Data = 0x0f;
2576 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2577 if (status < 0) {
2578 dbg("Writing ZLP_REG5 failed status-0x%x", status);
2579 goto error;
2580 } else
2581 dbg("ZLP_REG5 Writing success status%d", status);
2582
2583 /* setting configuration feature to one */
2584 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2585 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
2586 return 0;
2587 error:
2588 for (/* nothing */; i >= 0; i--) {
2589 mos7840_port = mos7840_get_port_private(serial->port[i]);
2590
2591 kfree(mos7840_port->dr);
2592 kfree(mos7840_port->ctrl_buf);
2593 usb_free_urb(mos7840_port->control_urb);
2594 kfree(mos7840_port);
2595 serial->port[i] = NULL;
2596 }
2597 return status;
2598 }
2599
2600 /****************************************************************************
2601 * mos7840_disconnect
2602 * This function is called whenever the device is removed from the usb bus.
2603 ****************************************************************************/
2604
2605 static void mos7840_disconnect(struct usb_serial *serial)
2606 {
2607 int i;
2608 unsigned long flags;
2609 struct moschip_port *mos7840_port;
2610 dbg("%s", " disconnect :entering..........");
2611
2612 if (!serial) {
2613 dbg("%s", "Invalid Handler");
2614 return;
2615 }
2616
2617 /* check for the ports to be closed,close the ports and disconnect */
2618
2619 /* free private structure allocated for serial port *
2620 * stop reads and writes on all ports */
2621
2622 for (i = 0; i < serial->num_ports; ++i) {
2623 mos7840_port = mos7840_get_port_private(serial->port[i]);
2624 dbg ("mos7840_port %d = %p", i, mos7840_port);
2625 if (mos7840_port) {
2626 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2627 mos7840_port->zombie = 1;
2628 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
2629 usb_kill_urb(mos7840_port->control_urb);
2630 }
2631 }
2632
2633 dbg("%s", "Thank u :: ");
2634
2635 }
2636
2637 /****************************************************************************
2638 * mos7840_release
2639 * This function is called when the usb_serial structure is freed.
2640 ****************************************************************************/
2641
2642 static void mos7840_release(struct usb_serial *serial)
2643 {
2644 int i;
2645 struct moschip_port *mos7840_port;
2646 dbg("%s", " release :entering..........");
2647
2648 if (!serial) {
2649 dbg("%s", "Invalid Handler");
2650 return;
2651 }
2652
2653 /* check for the ports to be closed,close the ports and disconnect */
2654
2655 /* free private structure allocated for serial port *
2656 * stop reads and writes on all ports */
2657
2658 for (i = 0; i < serial->num_ports; ++i) {
2659 mos7840_port = mos7840_get_port_private(serial->port[i]);
2660 dbg("mos7840_port %d = %p", i, mos7840_port);
2661 if (mos7840_port) {
2662 kfree(mos7840_port->ctrl_buf);
2663 kfree(mos7840_port->dr);
2664 kfree(mos7840_port);
2665 }
2666 }
2667
2668 dbg("%s", "Thank u :: ");
2669
2670 }
2671
2672 static struct usb_driver io_driver = {
2673 .name = "mos7840",
2674 .probe = usb_serial_probe,
2675 .disconnect = usb_serial_disconnect,
2676 .id_table = moschip_id_table_combined,
2677 .no_dynamic_id = 1,
2678 };
2679
2680 static struct usb_serial_driver moschip7840_4port_device = {
2681 .driver = {
2682 .owner = THIS_MODULE,
2683 .name = "mos7840",
2684 },
2685 .description = DRIVER_DESC,
2686 .usb_driver = &io_driver,
2687 .id_table = moschip_port_id_table,
2688 .num_ports = 4,
2689 .open = mos7840_open,
2690 .close = mos7840_close,
2691 .write = mos7840_write,
2692 .write_room = mos7840_write_room,
2693 .chars_in_buffer = mos7840_chars_in_buffer,
2694 .throttle = mos7840_throttle,
2695 .unthrottle = mos7840_unthrottle,
2696 .calc_num_ports = mos7840_calc_num_ports,
2697 #ifdef MCSSerialProbe
2698 .probe = mos7840_serial_probe,
2699 #endif
2700 .ioctl = mos7840_ioctl,
2701 .set_termios = mos7840_set_termios,
2702 .break_ctl = mos7840_break,
2703 .tiocmget = mos7840_tiocmget,
2704 .tiocmset = mos7840_tiocmset,
2705 .get_icount = mos7840_get_icount,
2706 .attach = mos7840_startup,
2707 .disconnect = mos7840_disconnect,
2708 .release = mos7840_release,
2709 .read_bulk_callback = mos7840_bulk_in_callback,
2710 .read_int_callback = mos7840_interrupt_callback,
2711 };
2712
2713 /****************************************************************************
2714 * moschip7840_init
2715 * This is called by the module subsystem, or on startup to initialize us
2716 ****************************************************************************/
2717 static int __init moschip7840_init(void)
2718 {
2719 int retval;
2720
2721 dbg("%s", " mos7840_init :entering..........");
2722
2723 /* Register with the usb serial */
2724 retval = usb_serial_register(&moschip7840_4port_device);
2725
2726 if (retval)
2727 goto failed_port_device_register;
2728
2729 dbg("%s", "Entering...");
2730 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2731 DRIVER_DESC "\n");
2732
2733 /* Register with the usb */
2734 retval = usb_register(&io_driver);
2735 if (retval == 0) {
2736 dbg("%s", "Leaving...");
2737 return 0;
2738 }
2739 usb_serial_deregister(&moschip7840_4port_device);
2740 failed_port_device_register:
2741 return retval;
2742 }
2743
2744 /****************************************************************************
2745 * moschip7840_exit
2746 * Called when the driver is about to be unloaded.
2747 ****************************************************************************/
2748 static void __exit moschip7840_exit(void)
2749 {
2750
2751 dbg("%s", " mos7840_exit :entering..........");
2752
2753 usb_deregister(&io_driver);
2754
2755 usb_serial_deregister(&moschip7840_4port_device);
2756
2757 dbg("%s", "Entering...");
2758 }
2759
2760 module_init(moschip7840_init);
2761 module_exit(moschip7840_exit);
2762
2763 /* Module information */
2764 MODULE_DESCRIPTION(DRIVER_DESC);
2765 MODULE_LICENSE("GPL");
2766
2767 module_param(debug, bool, S_IRUGO | S_IWUSR);
2768 MODULE_PARM_DESC(debug, "Debug enabled or not");