projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
ALSA: hda_intel: add position_fix quirk for Asus K53E
[deliverable/linux.git] / drivers / usb / serial / mos7840.c
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 #define MOSCHIP_DEVICE_ID_7810 0x7810
118 /* The native component can have its vendor/device id's overridden
119 * in vendor-specific implementations. Such devices can be handled
120 * by making a change here, in id_table.
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 /* LED on/off milliseconds*/
188 #define LED_ON_MS 500
189 #define LED_OFF_MS 500
190
191 static int device_type;
192
193 static const struct usb_device_id id_table[] = {
194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
195 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
196 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
208 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
209 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
210 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
211 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
212 {} /* terminating entry */
213 };
214 MODULE_DEVICE_TABLE(usb, id_table);
215
216 /* This structure holds all of the local port information */
217
218 struct moschip_port {
219 int port_num; /*Actual port number in the device(1,2,etc) */
220 struct urb *write_urb; /* write URB for this port */
221 struct urb *read_urb; /* read URB for this port */
222 struct urb *int_urb;
223 __u8 shadowLCR; /* last LCR value received */
224 __u8 shadowMCR; /* last MCR value received */
225 char open;
226 char open_ports;
227 char zombie;
228 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
229 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
230 int delta_msr_cond;
231 struct async_icount icount;
232 struct usb_serial_port *port; /* loop back to the owner of this object */
233
234 /* Offsets */
235 __u8 SpRegOffset;
236 __u8 ControlRegOffset;
237 __u8 DcrRegOffset;
238 /* for processing control URBS in interrupt context */
239 struct urb *control_urb;
240 struct usb_ctrlrequest *dr;
241 char *ctrl_buf;
242 int MsrLsr;
243
244 spinlock_t pool_lock;
245 struct urb *write_urb_pool[NUM_URBS];
246 char busy[NUM_URBS];
247 bool read_urb_busy;
248
249 /* For device(s) with LED indicator */
250 bool has_led;
251 bool led_flag;
252 struct timer_list led_timer1; /* Timer for LED on */
253 struct timer_list led_timer2; /* Timer for LED off */
254 };
255
256 static bool debug;
257
258 /*
259 * mos7840_set_reg_sync
260 * To set the Control register by calling usb_fill_control_urb function
261 * by passing usb_sndctrlpipe function as parameter.
262 */
263
264 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
265 __u16 val)
266 {
267 struct usb_device *dev = port->serial->dev;
268 val = val & 0x00ff;
269 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val);
270
271 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
272 MCS_WR_RTYPE, val, reg, NULL, 0,
273 MOS_WDR_TIMEOUT);
274 }
275
276 /*
277 * mos7840_get_reg_sync
278 * To set the Uart register by calling usb_fill_control_urb function by
279 * passing usb_rcvctrlpipe function as parameter.
280 */
281
282 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
283 __u16 *val)
284 {
285 struct usb_device *dev = port->serial->dev;
286 int ret = 0;
287 u8 *buf;
288
289 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
290 if (!buf)
291 return -ENOMEM;
292
293 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
294 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
295 MOS_WDR_TIMEOUT);
296 *val = buf[0];
297 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
298
299 kfree(buf);
300 return ret;
301 }
302
303 /*
304 * mos7840_set_uart_reg
305 * To set the Uart register by calling usb_fill_control_urb function by
306 * passing usb_sndctrlpipe function as parameter.
307 */
308
309 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
310 __u16 val)
311 {
312
313 struct usb_device *dev = port->serial->dev;
314 val = val & 0x00ff;
315 /* For the UART control registers, the application number need
316 to be Or'ed */
317 if (port->serial->num_ports == 4) {
318 val |= (((__u16) port->number -
319 (__u16) (port->serial->minor)) + 1) << 8;
320 dbg("mos7840_set_uart_reg application number is %x", val);
321 } else {
322 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
323 val |= (((__u16) port->number -
324 (__u16) (port->serial->minor)) + 1) << 8;
325 dbg("mos7840_set_uart_reg application number is %x",
326 val);
327 } else {
328 val |=
329 (((__u16) port->number -
330 (__u16) (port->serial->minor)) + 2) << 8;
331 dbg("mos7840_set_uart_reg application number is %x",
332 val);
333 }
334 }
335 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
336 MCS_WR_RTYPE, val, reg, NULL, 0,
337 MOS_WDR_TIMEOUT);
338
339 }
340
341 /*
342 * mos7840_get_uart_reg
343 * To set the Control register by calling usb_fill_control_urb function
344 * by passing usb_rcvctrlpipe function as parameter.
345 */
346 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
347 __u16 *val)
348 {
349 struct usb_device *dev = port->serial->dev;
350 int ret = 0;
351 __u16 Wval;
352 u8 *buf;
353
354 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
355 if (!buf)
356 return -ENOMEM;
357
358 /* dbg("application number is %4x",
359 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
360 /* Wval is same as application number */
361 if (port->serial->num_ports == 4) {
362 Wval =
363 (((__u16) port->number - (__u16) (port->serial->minor)) +
364 1) << 8;
365 dbg("mos7840_get_uart_reg application number is %x", Wval);
366 } else {
367 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
368 Wval = (((__u16) port->number -
369 (__u16) (port->serial->minor)) + 1) << 8;
370 dbg("mos7840_get_uart_reg application number is %x",
371 Wval);
372 } else {
373 Wval = (((__u16) port->number -
374 (__u16) (port->serial->minor)) + 2) << 8;
375 dbg("mos7840_get_uart_reg application number is %x",
376 Wval);
377 }
378 }
379 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
380 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
381 MOS_WDR_TIMEOUT);
382 *val = buf[0];
383
384 kfree(buf);
385 return ret;
386 }
387
388 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
389 {
390
391 dbg("***************************************");
392 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset);
393 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset);
394 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset);
395 dbg("***************************************");
396
397 }
398
399 /************************************************************************/
400 /************************************************************************/
401 /* I N T E R F A C E F U N C T I O N S */
402 /* I N T E R F A C E F U N C T I O N S */
403 /************************************************************************/
404 /************************************************************************/
405
406 static inline void mos7840_set_port_private(struct usb_serial_port *port,
407 struct moschip_port *data)
408 {
409 usb_set_serial_port_data(port, (void *)data);
410 }
411
412 static inline struct moschip_port *mos7840_get_port_private(struct
413 usb_serial_port
414 *port)
415 {
416 return (struct moschip_port *)usb_get_serial_port_data(port);
417 }
418
419 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
420 {
421 struct moschip_port *mos7840_port;
422 struct async_icount *icount;
423 mos7840_port = port;
424 icount = &mos7840_port->icount;
425 if (new_msr &
426 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
427 MOS_MSR_DELTA_CD)) {
428 icount = &mos7840_port->icount;
429
430 /* update input line counters */
431 if (new_msr & MOS_MSR_DELTA_CTS) {
432 icount->cts++;
433 smp_wmb();
434 }
435 if (new_msr & MOS_MSR_DELTA_DSR) {
436 icount->dsr++;
437 smp_wmb();
438 }
439 if (new_msr & MOS_MSR_DELTA_CD) {
440 icount->dcd++;
441 smp_wmb();
442 }
443 if (new_msr & MOS_MSR_DELTA_RI) {
444 icount->rng++;
445 smp_wmb();
446 }
447 }
448 }
449
450 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
451 {
452 struct async_icount *icount;
453
454 dbg("%s - %02x", __func__, new_lsr);
455
456 if (new_lsr & SERIAL_LSR_BI) {
457 /*
458 * Parity and Framing errors only count if they
459 * occur exclusive of a break being
460 * received.
461 */
462 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
463 }
464
465 /* update input line counters */
466 icount = &port->icount;
467 if (new_lsr & SERIAL_LSR_BI) {
468 icount->brk++;
469 smp_wmb();
470 }
471 if (new_lsr & SERIAL_LSR_OE) {
472 icount->overrun++;
473 smp_wmb();
474 }
475 if (new_lsr & SERIAL_LSR_PE) {
476 icount->parity++;
477 smp_wmb();
478 }
479 if (new_lsr & SERIAL_LSR_FE) {
480 icount->frame++;
481 smp_wmb();
482 }
483 }
484
485 /************************************************************************/
486 /************************************************************************/
487 /* U S B C A L L B A C K F U N C T I O N S */
488 /* U S B C A L L B A C K F U N C T I O N S */
489 /************************************************************************/
490 /************************************************************************/
491
492 static void mos7840_control_callback(struct urb *urb)
493 {
494 unsigned char *data;
495 struct moschip_port *mos7840_port;
496 __u8 regval = 0x0;
497 int result = 0;
498 int status = urb->status;
499
500 mos7840_port = urb->context;
501
502 switch (status) {
503 case 0:
504 /* success */
505 break;
506 case -ECONNRESET:
507 case -ENOENT:
508 case -ESHUTDOWN:
509 /* this urb is terminated, clean up */
510 dbg("%s - urb shutting down with status: %d", __func__,
511 status);
512 return;
513 default:
514 dbg("%s - nonzero urb status received: %d", __func__,
515 status);
516 goto exit;
517 }
518
519 dbg("%s urb buffer size is %d", __func__, urb->actual_length);
520 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__,
521 mos7840_port->MsrLsr, mos7840_port->port_num);
522 data = urb->transfer_buffer;
523 regval = (__u8) data[0];
524 dbg("%s data is %x", __func__, regval);
525 if (mos7840_port->MsrLsr == 0)
526 mos7840_handle_new_msr(mos7840_port, regval);
527 else if (mos7840_port->MsrLsr == 1)
528 mos7840_handle_new_lsr(mos7840_port, regval);
529
530 exit:
531 spin_lock(&mos7840_port->pool_lock);
532 if (!mos7840_port->zombie)
533 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
534 spin_unlock(&mos7840_port->pool_lock);
535 if (result) {
536 dev_err(&urb->dev->dev,
537 "%s - Error %d submitting interrupt urb\n",
538 __func__, result);
539 }
540 }
541
542 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
543 __u16 *val)
544 {
545 struct usb_device *dev = mcs->port->serial->dev;
546 struct usb_ctrlrequest *dr = mcs->dr;
547 unsigned char *buffer = mcs->ctrl_buf;
548 int ret;
549
550 dr->bRequestType = MCS_RD_RTYPE;
551 dr->bRequest = MCS_RDREQ;
552 dr->wValue = cpu_to_le16(Wval); /* 0 */
553 dr->wIndex = cpu_to_le16(reg);
554 dr->wLength = cpu_to_le16(2);
555
556 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
557 (unsigned char *)dr, buffer, 2,
558 mos7840_control_callback, mcs);
559 mcs->control_urb->transfer_buffer_length = 2;
560 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
561 return ret;
562 }
563
564 static void mos7840_set_led_callback(struct urb *urb)
565 {
566 switch (urb->status) {
567 case 0:
568 /* Success */
569 break;
570 case -ECONNRESET:
571 case -ENOENT:
572 case -ESHUTDOWN:
573 /* This urb is terminated, clean up */
574 dbg("%s - urb shutting down with status: %d", __func__,
575 urb->status);
576 break;
577 default:
578 dbg("%s - nonzero urb status received: %d", __func__,
579 urb->status);
580 }
581 }
582
583 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
584 __u16 reg)
585 {
586 struct usb_device *dev = mcs->port->serial->dev;
587 struct usb_ctrlrequest *dr = mcs->dr;
588
589 dr->bRequestType = MCS_WR_RTYPE;
590 dr->bRequest = MCS_WRREQ;
591 dr->wValue = cpu_to_le16(wval);
592 dr->wIndex = cpu_to_le16(reg);
593 dr->wLength = cpu_to_le16(0);
594
595 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),
596 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
597
598 usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
599 }
600
601 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
602 __u16 val)
603 {
604 struct usb_device *dev = port->serial->dev;
605
606 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
607 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
608 }
609
610 static void mos7840_led_off(unsigned long arg)
611 {
612 struct moschip_port *mcs = (struct moschip_port *) arg;
613
614 /* Turn off LED */
615 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
616 mod_timer(&mcs->led_timer2,
617 jiffies + msecs_to_jiffies(LED_OFF_MS));
618 }
619
620 static void mos7840_led_flag_off(unsigned long arg)
621 {
622 struct moschip_port *mcs = (struct moschip_port *) arg;
623
624 mcs->led_flag = false;
625 }
626
627 /*****************************************************************************
628 * mos7840_interrupt_callback
629 * this is the callback function for when we have received data on the
630 * interrupt endpoint.
631 *****************************************************************************/
632
633 static void mos7840_interrupt_callback(struct urb *urb)
634 {
635 int result;
636 int length;
637 struct moschip_port *mos7840_port;
638 struct usb_serial *serial;
639 __u16 Data;
640 unsigned char *data;
641 __u8 sp[5], st;
642 int i, rv = 0;
643 __u16 wval, wreg = 0;
644 int status = urb->status;
645
646 switch (status) {
647 case 0:
648 /* success */
649 break;
650 case -ECONNRESET:
651 case -ENOENT:
652 case -ESHUTDOWN:
653 /* this urb is terminated, clean up */
654 dbg("%s - urb shutting down with status: %d", __func__,
655 status);
656 return;
657 default:
658 dbg("%s - nonzero urb status received: %d", __func__,
659 status);
660 goto exit;
661 }
662
663 length = urb->actual_length;
664 data = urb->transfer_buffer;
665
666 serial = urb->context;
667
668 /* Moschip get 5 bytes
669 * Byte 1 IIR Port 1 (port.number is 0)
670 * Byte 2 IIR Port 2 (port.number is 1)
671 * Byte 3 IIR Port 3 (port.number is 2)
672 * Byte 4 IIR Port 4 (port.number is 3)
673 * Byte 5 FIFO status for both */
674
675 if (length && length > 5) {
676 dbg("%s", "Wrong data !!!");
677 return;
678 }
679
680 sp[0] = (__u8) data[0];
681 sp[1] = (__u8) data[1];
682 sp[2] = (__u8) data[2];
683 sp[3] = (__u8) data[3];
684 st = (__u8) data[4];
685
686 for (i = 0; i < serial->num_ports; i++) {
687 mos7840_port = mos7840_get_port_private(serial->port[i]);
688 wval =
689 (((__u16) serial->port[i]->number -
690 (__u16) (serial->minor)) + 1) << 8;
691 if (mos7840_port->open) {
692 if (sp[i] & 0x01) {
693 dbg("SP%d No Interrupt !!!", i);
694 } else {
695 switch (sp[i] & 0x0f) {
696 case SERIAL_IIR_RLS:
697 dbg("Serial Port %d: Receiver status error or ", i);
698 dbg("address bit detected in 9-bit mode");
699 mos7840_port->MsrLsr = 1;
700 wreg = LINE_STATUS_REGISTER;
701 break;
702 case SERIAL_IIR_MS:
703 dbg("Serial Port %d: Modem status change", i);
704 mos7840_port->MsrLsr = 0;
705 wreg = MODEM_STATUS_REGISTER;
706 break;
707 }
708 spin_lock(&mos7840_port->pool_lock);
709 if (!mos7840_port->zombie) {
710 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
711 } else {
712 spin_unlock(&mos7840_port->pool_lock);
713 return;
714 }
715 spin_unlock(&mos7840_port->pool_lock);
716 }
717 }
718 }
719 if (!(rv < 0))
720 /* the completion handler for the control urb will resubmit */
721 return;
722 exit:
723 result = usb_submit_urb(urb, GFP_ATOMIC);
724 if (result) {
725 dev_err(&urb->dev->dev,
726 "%s - Error %d submitting interrupt urb\n",
727 __func__, result);
728 }
729 }
730
731 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
732 const char *function)
733 {
734 if (!port) {
735 dbg("%s - port == NULL", function);
736 return -1;
737 }
738 if (!port->serial) {
739 dbg("%s - port->serial == NULL", function);
740 return -1;
741 }
742
743 return 0;
744 }
745
746 /* Inline functions to check the sanity of a pointer that is passed to us */
747 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
748 const char *function)
749 {
750 if (!serial) {
751 dbg("%s - serial == NULL", function);
752 return -1;
753 }
754 if (!serial->type) {
755 dbg("%s - serial->type == NULL!", function);
756 return -1;
757 }
758
759 return 0;
760 }
761
762 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
763 const char *function)
764 {
765 /* if no port was specified, or it fails a paranoia check */
766 if (!port ||
767 mos7840_port_paranoia_check(port, function) ||
768 mos7840_serial_paranoia_check(port->serial, function)) {
769 /* then say that we don't have a valid usb_serial thing,
770 * which will end up genrating -ENODEV return values */
771 return NULL;
772 }
773
774 return port->serial;
775 }
776
777 /*****************************************************************************
778 * mos7840_bulk_in_callback
779 * this is the callback function for when we have received data on the
780 * bulk in endpoint.
781 *****************************************************************************/
782
783 static void mos7840_bulk_in_callback(struct urb *urb)
784 {
785 int retval;
786 unsigned char *data;
787 struct usb_serial *serial;
788 struct usb_serial_port *port;
789 struct moschip_port *mos7840_port;
790 struct tty_struct *tty;
791 int status = urb->status;
792
793 mos7840_port = urb->context;
794 if (!mos7840_port) {
795 dbg("%s", "NULL mos7840_port pointer");
796 return;
797 }
798
799 if (status) {
800 dbg("nonzero read bulk status received: %d", status);
801 mos7840_port->read_urb_busy = false;
802 return;
803 }
804
805 port = (struct usb_serial_port *)mos7840_port->port;
806 if (mos7840_port_paranoia_check(port, __func__)) {
807 dbg("%s", "Port Paranoia failed");
808 mos7840_port->read_urb_busy = false;
809 return;
810 }
811
812 serial = mos7840_get_usb_serial(port, __func__);
813 if (!serial) {
814 dbg("%s", "Bad serial pointer");
815 mos7840_port->read_urb_busy = false;
816 return;
817 }
818
819 data = urb->transfer_buffer;
820
821 if (urb->actual_length) {
822 tty = tty_port_tty_get(&mos7840_port->port->port);
823 if (tty) {
824 tty_insert_flip_string(tty, data, urb->actual_length);
825 dbg(" %s ", data);
826 tty_flip_buffer_push(tty);
827 tty_kref_put(tty);
828 }
829 mos7840_port->icount.rx += urb->actual_length;
830 smp_wmb();
831 dbg("mos7840_port->icount.rx is %d:",
832 mos7840_port->icount.rx);
833 }
834
835 if (!mos7840_port->read_urb) {
836 dbg("%s", "URB KILLED !!!");
837 mos7840_port->read_urb_busy = false;
838 return;
839 }
840
841 /* Turn on LED */
842 if (mos7840_port->has_led && !mos7840_port->led_flag) {
843 mos7840_port->led_flag = true;
844 mos7840_set_led_async(mos7840_port, 0x0301,
845 MODEM_CONTROL_REGISTER);
846 mod_timer(&mos7840_port->led_timer1,
847 jiffies + msecs_to_jiffies(LED_ON_MS));
848 }
849
850 mos7840_port->read_urb_busy = true;
851 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
852
853 if (retval) {
854 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
855 mos7840_port->read_urb_busy = false;
856 }
857 }
858
859 /*****************************************************************************
860 * mos7840_bulk_out_data_callback
861 * this is the callback function for when we have finished sending
862 * serial data on the bulk out endpoint.
863 *****************************************************************************/
864
865 static void mos7840_bulk_out_data_callback(struct urb *urb)
866 {
867 struct moschip_port *mos7840_port;
868 struct tty_struct *tty;
869 int status = urb->status;
870 int i;
871
872 mos7840_port = urb->context;
873 spin_lock(&mos7840_port->pool_lock);
874 for (i = 0; i < NUM_URBS; i++) {
875 if (urb == mos7840_port->write_urb_pool[i]) {
876 mos7840_port->busy[i] = 0;
877 break;
878 }
879 }
880 spin_unlock(&mos7840_port->pool_lock);
881
882 if (status) {
883 dbg("nonzero write bulk status received:%d", status);
884 return;
885 }
886
887 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
888 dbg("%s", "Port Paranoia failed");
889 return;
890 }
891
892 tty = tty_port_tty_get(&mos7840_port->port->port);
893 if (tty && mos7840_port->open)
894 tty_wakeup(tty);
895 tty_kref_put(tty);
896
897 }
898
899 /************************************************************************/
900 /* 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 */
901 /************************************************************************/
902 #ifdef MCSSerialProbe
903 static int mos7840_serial_probe(struct usb_serial *serial,
904 const struct usb_device_id *id)
905 {
906
907 /*need to implement the mode_reg reading and updating\
908 structures usb_serial_ device_type\
909 (i.e num_ports, num_bulkin,bulkout etc) */
910 /* Also we can update the changes attach */
911 return 1;
912 }
913 #endif
914
915 /*****************************************************************************
916 * mos7840_open
917 * this function is called by the tty driver when a port is opened
918 * If successful, we return 0
919 * Otherwise we return a negative error number.
920 *****************************************************************************/
921
922 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
923 {
924 int response;
925 int j;
926 struct usb_serial *serial;
927 struct urb *urb;
928 __u16 Data;
929 int status;
930 struct moschip_port *mos7840_port;
931 struct moschip_port *port0;
932
933 if (mos7840_port_paranoia_check(port, __func__)) {
934 dbg("%s", "Port Paranoia failed");
935 return -ENODEV;
936 }
937
938 serial = port->serial;
939
940 if (mos7840_serial_paranoia_check(serial, __func__)) {
941 dbg("%s", "Serial Paranoia failed");
942 return -ENODEV;
943 }
944
945 mos7840_port = mos7840_get_port_private(port);
946 port0 = mos7840_get_port_private(serial->port[0]);
947
948 if (mos7840_port == NULL || port0 == NULL)
949 return -ENODEV;
950
951 usb_clear_halt(serial->dev, port->write_urb->pipe);
952 usb_clear_halt(serial->dev, port->read_urb->pipe);
953 port0->open_ports++;
954
955 /* Initialising the write urb pool */
956 for (j = 0; j < NUM_URBS; ++j) {
957 urb = usb_alloc_urb(0, GFP_KERNEL);
958 mos7840_port->write_urb_pool[j] = urb;
959
960 if (urb == NULL) {
961 dev_err(&port->dev, "No more urbs???\n");
962 continue;
963 }
964
965 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
966 GFP_KERNEL);
967 if (!urb->transfer_buffer) {
968 usb_free_urb(urb);
969 mos7840_port->write_urb_pool[j] = NULL;
970 dev_err(&port->dev,
971 "%s-out of memory for urb buffers.\n",
972 __func__);
973 continue;
974 }
975 }
976
977 /*****************************************************************************
978 * Initialize MCS7840 -- Write Init values to corresponding Registers
979 *
980 * Register Index
981 * 1 : IER
982 * 2 : FCR
983 * 3 : LCR
984 * 4 : MCR
985 *
986 * 0x08 : SP1/2 Control Reg
987 *****************************************************************************/
988
989 /* NEED to check the following Block */
990
991 Data = 0x0;
992 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
993 if (status < 0) {
994 dbg("Reading Spreg failed");
995 return -1;
996 }
997 Data |= 0x80;
998 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
999 if (status < 0) {
1000 dbg("writing Spreg failed");
1001 return -1;
1002 }
1003
1004 Data &= ~0x80;
1005 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1006 if (status < 0) {
1007 dbg("writing Spreg failed");
1008 return -1;
1009 }
1010 /* End of block to be checked */
1011
1012 Data = 0x0;
1013 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1014 &Data);
1015 if (status < 0) {
1016 dbg("Reading Controlreg failed");
1017 return -1;
1018 }
1019 Data |= 0x08; /* Driver done bit */
1020 Data |= 0x20; /* rx_disable */
1021 status = mos7840_set_reg_sync(port,
1022 mos7840_port->ControlRegOffset, Data);
1023 if (status < 0) {
1024 dbg("writing Controlreg failed");
1025 return -1;
1026 }
1027 /* do register settings here */
1028 /* Set all regs to the device default values. */
1029 /***********************************
1030 * First Disable all interrupts.
1031 ***********************************/
1032 Data = 0x00;
1033 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1034 if (status < 0) {
1035 dbg("disabling interrupts failed");
1036 return -1;
1037 }
1038 /* Set FIFO_CONTROL_REGISTER to the default value */
1039 Data = 0x00;
1040 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1041 if (status < 0) {
1042 dbg("Writing FIFO_CONTROL_REGISTER failed");
1043 return -1;
1044 }
1045
1046 Data = 0xcf;
1047 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1048 if (status < 0) {
1049 dbg("Writing FIFO_CONTROL_REGISTER failed");
1050 return -1;
1051 }
1052
1053 Data = 0x03;
1054 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1055 mos7840_port->shadowLCR = Data;
1056
1057 Data = 0x0b;
1058 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1059 mos7840_port->shadowMCR = Data;
1060
1061 Data = 0x00;
1062 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1063 mos7840_port->shadowLCR = Data;
1064
1065 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1066 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1067
1068 Data = 0x0c;
1069 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1070
1071 Data = 0x0;
1072 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1073
1074 Data = 0x00;
1075 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1076
1077 Data = Data & ~SERIAL_LCR_DLAB;
1078 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1079 mos7840_port->shadowLCR = Data;
1080
1081 /* clearing Bulkin and Bulkout Fifo */
1082 Data = 0x0;
1083 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1084
1085 Data = Data | 0x0c;
1086 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1087
1088 Data = Data & ~0x0c;
1089 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1090 /* Finally enable all interrupts */
1091 Data = 0x0c;
1092 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1093
1094 /* clearing rx_disable */
1095 Data = 0x0;
1096 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1097 &Data);
1098 Data = Data & ~0x20;
1099 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1100 Data);
1101
1102 /* rx_negate */
1103 Data = 0x0;
1104 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1105 &Data);
1106 Data = Data | 0x10;
1107 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1108 Data);
1109
1110 /* Check to see if we've set up our endpoint info yet *
1111 * (can't set it up in mos7840_startup as the structures *
1112 * were not set up at that time.) */
1113 if (port0->open_ports == 1) {
1114 if (serial->port[0]->interrupt_in_buffer == NULL) {
1115 /* set up interrupt urb */
1116 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1117 serial->dev,
1118 usb_rcvintpipe(serial->dev,
1119 serial->port[0]->interrupt_in_endpointAddress),
1120 serial->port[0]->interrupt_in_buffer,
1121 serial->port[0]->interrupt_in_urb->
1122 transfer_buffer_length,
1123 mos7840_interrupt_callback,
1124 serial,
1125 serial->port[0]->interrupt_in_urb->interval);
1126
1127 /* start interrupt read for mos7840 *
1128 * will continue as long as mos7840 is connected */
1129
1130 response =
1131 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1132 GFP_KERNEL);
1133 if (response) {
1134 dev_err(&port->dev, "%s - Error %d submitting "
1135 "interrupt urb\n", __func__, response);
1136 }
1137
1138 }
1139
1140 }
1141
1142 /* see if we've set up our endpoint info yet *
1143 * (can't set it up in mos7840_startup as the *
1144 * structures were not set up at that time.) */
1145
1146 dbg("port number is %d", port->number);
1147 dbg("serial number is %d", port->serial->minor);
1148 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
1149 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
1150 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
1151 dbg("port's number in the device is %d", mos7840_port->port_num);
1152 mos7840_port->read_urb = port->read_urb;
1153
1154 /* set up our bulk in urb */
1155 if ((serial->num_ports == 2)
1156 && ((((__u16)port->number -
1157 (__u16)(port->serial->minor)) % 2) != 0)) {
1158 usb_fill_bulk_urb(mos7840_port->read_urb,
1159 serial->dev,
1160 usb_rcvbulkpipe(serial->dev,
1161 (port->bulk_in_endpointAddress) + 2),
1162 port->bulk_in_buffer,
1163 mos7840_port->read_urb->transfer_buffer_length,
1164 mos7840_bulk_in_callback, mos7840_port);
1165 } else {
1166 usb_fill_bulk_urb(mos7840_port->read_urb,
1167 serial->dev,
1168 usb_rcvbulkpipe(serial->dev,
1169 port->bulk_in_endpointAddress),
1170 port->bulk_in_buffer,
1171 mos7840_port->read_urb->transfer_buffer_length,
1172 mos7840_bulk_in_callback, mos7840_port);
1173 }
1174
1175 dbg("mos7840_open: bulkin endpoint is %d",
1176 port->bulk_in_endpointAddress);
1177 mos7840_port->read_urb_busy = true;
1178 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1179 if (response) {
1180 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1181 __func__, response);
1182 mos7840_port->read_urb_busy = false;
1183 }
1184
1185 /* initialize our wait queues */
1186 init_waitqueue_head(&mos7840_port->wait_chase);
1187 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1188
1189 /* initialize our icount structure */
1190 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1191
1192 /* initialize our port settings */
1193 /* Must set to enable ints! */
1194 mos7840_port->shadowMCR = MCR_MASTER_IE;
1195 /* send a open port command */
1196 mos7840_port->open = 1;
1197 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1198 mos7840_port->icount.tx = 0;
1199 mos7840_port->icount.rx = 0;
1200
1201 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1202 serial, mos7840_port, port);
1203
1204 return 0;
1205 }
1206
1207 /*****************************************************************************
1208 * mos7840_chars_in_buffer
1209 * this function is called by the tty driver when it wants to know how many
1210 * bytes of data we currently have outstanding in the port (data that has
1211 * been written, but hasn't made it out the port yet)
1212 * If successful, we return the number of bytes left to be written in the
1213 * system,
1214 * Otherwise we return zero.
1215 *****************************************************************************/
1216
1217 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1218 {
1219 struct usb_serial_port *port = tty->driver_data;
1220 int i;
1221 int chars = 0;
1222 unsigned long flags;
1223 struct moschip_port *mos7840_port;
1224
1225 if (mos7840_port_paranoia_check(port, __func__)) {
1226 dbg("%s", "Invalid port");
1227 return 0;
1228 }
1229
1230 mos7840_port = mos7840_get_port_private(port);
1231 if (mos7840_port == NULL)
1232 return 0;
1233
1234 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1235 for (i = 0; i < NUM_URBS; ++i)
1236 if (mos7840_port->busy[i])
1237 chars += URB_TRANSFER_BUFFER_SIZE;
1238 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1239 dbg("%s - returns %d", __func__, chars);
1240 return chars;
1241
1242 }
1243
1244 /*****************************************************************************
1245 * mos7840_close
1246 * this function is called by the tty driver when a port is closed
1247 *****************************************************************************/
1248
1249 static void mos7840_close(struct usb_serial_port *port)
1250 {
1251 struct usb_serial *serial;
1252 struct moschip_port *mos7840_port;
1253 struct moschip_port *port0;
1254 int j;
1255 __u16 Data;
1256
1257 if (mos7840_port_paranoia_check(port, __func__)) {
1258 dbg("%s", "Port Paranoia failed");
1259 return;
1260 }
1261
1262 serial = mos7840_get_usb_serial(port, __func__);
1263 if (!serial) {
1264 dbg("%s", "Serial Paranoia failed");
1265 return;
1266 }
1267
1268 mos7840_port = mos7840_get_port_private(port);
1269 port0 = mos7840_get_port_private(serial->port[0]);
1270
1271 if (mos7840_port == NULL || port0 == NULL)
1272 return;
1273
1274 for (j = 0; j < NUM_URBS; ++j)
1275 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1276
1277 /* Freeing Write URBs */
1278 for (j = 0; j < NUM_URBS; ++j) {
1279 if (mos7840_port->write_urb_pool[j]) {
1280 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1281 kfree(mos7840_port->write_urb_pool[j]->
1282 transfer_buffer);
1283
1284 usb_free_urb(mos7840_port->write_urb_pool[j]);
1285 }
1286 }
1287
1288 /* While closing port, shutdown all bulk read, write *
1289 * and interrupt read if they exists */
1290 if (serial->dev) {
1291 if (mos7840_port->write_urb) {
1292 dbg("%s", "Shutdown bulk write");
1293 usb_kill_urb(mos7840_port->write_urb);
1294 }
1295 if (mos7840_port->read_urb) {
1296 dbg("%s", "Shutdown bulk read");
1297 usb_kill_urb(mos7840_port->read_urb);
1298 mos7840_port->read_urb_busy = false;
1299 }
1300 if ((&mos7840_port->control_urb)) {
1301 dbg("%s", "Shutdown control read");
1302 /*/ usb_kill_urb (mos7840_port->control_urb); */
1303 }
1304 }
1305 /* if(mos7840_port->ctrl_buf != NULL) */
1306 /* kfree(mos7840_port->ctrl_buf); */
1307 port0->open_ports--;
1308 dbg("mos7840_num_open_ports in close%d:in port%d",
1309 port0->open_ports, port->number);
1310 if (port0->open_ports == 0) {
1311 if (serial->port[0]->interrupt_in_urb) {
1312 dbg("%s", "Shutdown interrupt_in_urb");
1313 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1314 }
1315 }
1316
1317 if (mos7840_port->write_urb) {
1318 /* if this urb had a transfer buffer already (old tx) free it */
1319 if (mos7840_port->write_urb->transfer_buffer != NULL)
1320 kfree(mos7840_port->write_urb->transfer_buffer);
1321 usb_free_urb(mos7840_port->write_urb);
1322 }
1323
1324 Data = 0x0;
1325 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1326
1327 Data = 0x00;
1328 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1329
1330 mos7840_port->open = 0;
1331 }
1332
1333 /************************************************************************
1334 *
1335 * mos7840_block_until_chase_response
1336 *
1337 * This function will block the close until one of the following:
1338 * 1. Response to our Chase comes from mos7840
1339 * 2. A timeout of 10 seconds without activity has expired
1340 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1341 *
1342 ************************************************************************/
1343
1344 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1345 struct moschip_port *mos7840_port)
1346 {
1347 int timeout = 1 * HZ;
1348 int wait = 10;
1349 int count;
1350
1351 while (1) {
1352 count = mos7840_chars_in_buffer(tty);
1353
1354 /* Check for Buffer status */
1355 if (count <= 0)
1356 return;
1357
1358 /* Block the thread for a while */
1359 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1360 timeout);
1361 /* No activity.. count down section */
1362 wait--;
1363 if (wait == 0) {
1364 dbg("%s - TIMEOUT", __func__);
1365 return;
1366 } else {
1367 /* Reset timeout value back to seconds */
1368 wait = 10;
1369 }
1370 }
1371
1372 }
1373
1374 /*****************************************************************************
1375 * mos7840_break
1376 * this function sends a break to the port
1377 *****************************************************************************/
1378 static void mos7840_break(struct tty_struct *tty, int break_state)
1379 {
1380 struct usb_serial_port *port = tty->driver_data;
1381 unsigned char data;
1382 struct usb_serial *serial;
1383 struct moschip_port *mos7840_port;
1384
1385 if (mos7840_port_paranoia_check(port, __func__)) {
1386 dbg("%s", "Port Paranoia failed");
1387 return;
1388 }
1389
1390 serial = mos7840_get_usb_serial(port, __func__);
1391 if (!serial) {
1392 dbg("%s", "Serial Paranoia failed");
1393 return;
1394 }
1395
1396 mos7840_port = mos7840_get_port_private(port);
1397
1398 if (mos7840_port == NULL)
1399 return;
1400
1401 if (serial->dev)
1402 /* flush and block until tx is empty */
1403 mos7840_block_until_chase_response(tty, mos7840_port);
1404
1405 if (break_state == -1)
1406 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1407 else
1408 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1409
1410 /* FIXME: no locking on shadowLCR anywhere in driver */
1411 mos7840_port->shadowLCR = data;
1412 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1413 mos7840_port->shadowLCR);
1414 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1415 mos7840_port->shadowLCR);
1416 }
1417
1418 /*****************************************************************************
1419 * mos7840_write_room
1420 * this function is called by the tty driver when it wants to know how many
1421 * bytes of data we can accept for a specific port.
1422 * If successful, we return the amount of room that we have for this port
1423 * Otherwise we return a negative error number.
1424 *****************************************************************************/
1425
1426 static int mos7840_write_room(struct tty_struct *tty)
1427 {
1428 struct usb_serial_port *port = tty->driver_data;
1429 int i;
1430 int room = 0;
1431 unsigned long flags;
1432 struct moschip_port *mos7840_port;
1433
1434 if (mos7840_port_paranoia_check(port, __func__)) {
1435 dbg("%s", "Invalid port");
1436 dbg("%s", " mos7840_write_room:leaving ...........");
1437 return -1;
1438 }
1439
1440 mos7840_port = mos7840_get_port_private(port);
1441 if (mos7840_port == NULL) {
1442 dbg("%s", "mos7840_break:leaving ...........");
1443 return -1;
1444 }
1445
1446 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1447 for (i = 0; i < NUM_URBS; ++i) {
1448 if (!mos7840_port->busy[i])
1449 room += URB_TRANSFER_BUFFER_SIZE;
1450 }
1451 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1452
1453 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1454 dbg("%s - returns %d", __func__, room);
1455 return room;
1456
1457 }
1458
1459 /*****************************************************************************
1460 * mos7840_write
1461 * this function is called by the tty driver when data should be written to
1462 * the port.
1463 * If successful, we return the number of bytes written, otherwise we
1464 * return a negative error number.
1465 *****************************************************************************/
1466
1467 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1468 const unsigned char *data, int count)
1469 {
1470 int status;
1471 int i;
1472 int bytes_sent = 0;
1473 int transfer_size;
1474 unsigned long flags;
1475
1476 struct moschip_port *mos7840_port;
1477 struct usb_serial *serial;
1478 struct urb *urb;
1479 /* __u16 Data; */
1480 const unsigned char *current_position = data;
1481 unsigned char *data1;
1482
1483 #ifdef NOTMOS7840
1484 Data = 0x00;
1485 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1486 mos7840_port->shadowLCR = Data;
1487 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
1488 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1489 mos7840_port->shadowLCR);
1490
1491 /* Data = 0x03; */
1492 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1493 /* mos7840_port->shadowLCR=Data;//Need to add later */
1494
1495 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1496 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1497
1498 /* Data = 0x0c; */
1499 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1500 Data = 0x00;
1501 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1502 dbg("mos7840_write:DLL value is %x", Data);
1503
1504 Data = 0x0;
1505 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1506 dbg("mos7840_write:DLM value is %x", Data);
1507
1508 Data = Data & ~SERIAL_LCR_DLAB;
1509 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1510 mos7840_port->shadowLCR);
1511 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1512 #endif
1513
1514 if (mos7840_port_paranoia_check(port, __func__)) {
1515 dbg("%s", "Port Paranoia failed");
1516 return -1;
1517 }
1518
1519 serial = port->serial;
1520 if (mos7840_serial_paranoia_check(serial, __func__)) {
1521 dbg("%s", "Serial Paranoia failed");
1522 return -1;
1523 }
1524
1525 mos7840_port = mos7840_get_port_private(port);
1526 if (mos7840_port == NULL) {
1527 dbg("%s", "mos7840_port is NULL");
1528 return -1;
1529 }
1530
1531 /* try to find a free urb in the list */
1532 urb = NULL;
1533
1534 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1535 for (i = 0; i < NUM_URBS; ++i) {
1536 if (!mos7840_port->busy[i]) {
1537 mos7840_port->busy[i] = 1;
1538 urb = mos7840_port->write_urb_pool[i];
1539 dbg("URB:%d", i);
1540 break;
1541 }
1542 }
1543 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1544
1545 if (urb == NULL) {
1546 dbg("%s - no more free urbs", __func__);
1547 goto exit;
1548 }
1549
1550 if (urb->transfer_buffer == NULL) {
1551 urb->transfer_buffer =
1552 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1553
1554 if (urb->transfer_buffer == NULL) {
1555 dev_err_console(port, "%s no more kernel memory...\n",
1556 __func__);
1557 goto exit;
1558 }
1559 }
1560 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1561
1562 memcpy(urb->transfer_buffer, current_position, transfer_size);
1563
1564 /* fill urb with data and submit */
1565 if ((serial->num_ports == 2)
1566 && ((((__u16)port->number -
1567 (__u16)(port->serial->minor)) % 2) != 0)) {
1568 usb_fill_bulk_urb(urb,
1569 serial->dev,
1570 usb_sndbulkpipe(serial->dev,
1571 (port->bulk_out_endpointAddress) + 2),
1572 urb->transfer_buffer,
1573 transfer_size,
1574 mos7840_bulk_out_data_callback, mos7840_port);
1575 } else {
1576 usb_fill_bulk_urb(urb,
1577 serial->dev,
1578 usb_sndbulkpipe(serial->dev,
1579 port->bulk_out_endpointAddress),
1580 urb->transfer_buffer,
1581 transfer_size,
1582 mos7840_bulk_out_data_callback, mos7840_port);
1583 }
1584
1585 data1 = urb->transfer_buffer;
1586 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
1587
1588 /* Turn on LED */
1589 if (mos7840_port->has_led && !mos7840_port->led_flag) {
1590 mos7840_port->led_flag = true;
1591 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);
1592 mod_timer(&mos7840_port->led_timer1,
1593 jiffies + msecs_to_jiffies(LED_ON_MS));
1594 }
1595
1596 /* send it down the pipe */
1597 status = usb_submit_urb(urb, GFP_ATOMIC);
1598
1599 if (status) {
1600 mos7840_port->busy[i] = 0;
1601 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1602 "with status = %d\n", __func__, status);
1603 bytes_sent = status;
1604 goto exit;
1605 }
1606 bytes_sent = transfer_size;
1607 mos7840_port->icount.tx += transfer_size;
1608 smp_wmb();
1609 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
1610 exit:
1611 return bytes_sent;
1612
1613 }
1614
1615 /*****************************************************************************
1616 * mos7840_throttle
1617 * this function is called by the tty driver when it wants to stop the data
1618 * being read from the port.
1619 *****************************************************************************/
1620
1621 static void mos7840_throttle(struct tty_struct *tty)
1622 {
1623 struct usb_serial_port *port = tty->driver_data;
1624 struct moschip_port *mos7840_port;
1625 int status;
1626
1627 if (mos7840_port_paranoia_check(port, __func__)) {
1628 dbg("%s", "Invalid port");
1629 return;
1630 }
1631
1632 dbg("- port %d", port->number);
1633
1634 mos7840_port = mos7840_get_port_private(port);
1635
1636 if (mos7840_port == NULL)
1637 return;
1638
1639 if (!mos7840_port->open) {
1640 dbg("%s", "port not opened");
1641 return;
1642 }
1643
1644 /* if we are implementing XON/XOFF, send the stop character */
1645 if (I_IXOFF(tty)) {
1646 unsigned char stop_char = STOP_CHAR(tty);
1647 status = mos7840_write(tty, port, &stop_char, 1);
1648 if (status <= 0)
1649 return;
1650 }
1651 /* if we are implementing RTS/CTS, toggle that line */
1652 if (tty->termios->c_cflag & CRTSCTS) {
1653 mos7840_port->shadowMCR &= ~MCR_RTS;
1654 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1655 mos7840_port->shadowMCR);
1656 if (status < 0)
1657 return;
1658 }
1659 }
1660
1661 /*****************************************************************************
1662 * mos7840_unthrottle
1663 * this function is called by the tty driver when it wants to resume
1664 * the data being read from the port (called after mos7840_throttle is
1665 * called)
1666 *****************************************************************************/
1667 static void mos7840_unthrottle(struct tty_struct *tty)
1668 {
1669 struct usb_serial_port *port = tty->driver_data;
1670 int status;
1671 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1672
1673 if (mos7840_port_paranoia_check(port, __func__)) {
1674 dbg("%s", "Invalid port");
1675 return;
1676 }
1677
1678 if (mos7840_port == NULL)
1679 return;
1680
1681 if (!mos7840_port->open) {
1682 dbg("%s - port not opened", __func__);
1683 return;
1684 }
1685
1686 /* if we are implementing XON/XOFF, send the start character */
1687 if (I_IXOFF(tty)) {
1688 unsigned char start_char = START_CHAR(tty);
1689 status = mos7840_write(tty, port, &start_char, 1);
1690 if (status <= 0)
1691 return;
1692 }
1693
1694 /* if we are implementing RTS/CTS, toggle that line */
1695 if (tty->termios->c_cflag & CRTSCTS) {
1696 mos7840_port->shadowMCR |= MCR_RTS;
1697 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1698 mos7840_port->shadowMCR);
1699 if (status < 0)
1700 return;
1701 }
1702 }
1703
1704 static int mos7840_tiocmget(struct tty_struct *tty)
1705 {
1706 struct usb_serial_port *port = tty->driver_data;
1707 struct moschip_port *mos7840_port;
1708 unsigned int result;
1709 __u16 msr;
1710 __u16 mcr;
1711 int status;
1712 mos7840_port = mos7840_get_port_private(port);
1713
1714 if (mos7840_port == NULL)
1715 return -ENODEV;
1716
1717 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1718 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1719 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1720 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1721 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1722 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1723 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1724 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1725 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1726
1727 dbg("%s - 0x%04X", __func__, result);
1728
1729 return result;
1730 }
1731
1732 static int mos7840_tiocmset(struct tty_struct *tty,
1733 unsigned int set, unsigned int clear)
1734 {
1735 struct usb_serial_port *port = tty->driver_data;
1736 struct moschip_port *mos7840_port;
1737 unsigned int mcr;
1738 int status;
1739
1740 mos7840_port = mos7840_get_port_private(port);
1741
1742 if (mos7840_port == NULL)
1743 return -ENODEV;
1744
1745 /* FIXME: What locks the port registers ? */
1746 mcr = mos7840_port->shadowMCR;
1747 if (clear & TIOCM_RTS)
1748 mcr &= ~MCR_RTS;
1749 if (clear & TIOCM_DTR)
1750 mcr &= ~MCR_DTR;
1751 if (clear & TIOCM_LOOP)
1752 mcr &= ~MCR_LOOPBACK;
1753
1754 if (set & TIOCM_RTS)
1755 mcr |= MCR_RTS;
1756 if (set & TIOCM_DTR)
1757 mcr |= MCR_DTR;
1758 if (set & TIOCM_LOOP)
1759 mcr |= MCR_LOOPBACK;
1760
1761 mos7840_port->shadowMCR = mcr;
1762
1763 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1764 if (status < 0) {
1765 dbg("setting MODEM_CONTROL_REGISTER Failed");
1766 return status;
1767 }
1768
1769 return 0;
1770 }
1771
1772 /*****************************************************************************
1773 * mos7840_calc_baud_rate_divisor
1774 * this function calculates the proper baud rate divisor for the specified
1775 * baud rate.
1776 *****************************************************************************/
1777 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1778 __u16 *clk_sel_val)
1779 {
1780 dbg("%s - %d", __func__, baudRate);
1781
1782 if (baudRate <= 115200) {
1783 *divisor = 115200 / baudRate;
1784 *clk_sel_val = 0x0;
1785 }
1786 if ((baudRate > 115200) && (baudRate <= 230400)) {
1787 *divisor = 230400 / baudRate;
1788 *clk_sel_val = 0x10;
1789 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1790 *divisor = 403200 / baudRate;
1791 *clk_sel_val = 0x20;
1792 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1793 *divisor = 460800 / baudRate;
1794 *clk_sel_val = 0x30;
1795 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1796 *divisor = 806400 / baudRate;
1797 *clk_sel_val = 0x40;
1798 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1799 *divisor = 921600 / baudRate;
1800 *clk_sel_val = 0x50;
1801 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1802 *divisor = 1572864 / baudRate;
1803 *clk_sel_val = 0x60;
1804 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1805 *divisor = 3145728 / baudRate;
1806 *clk_sel_val = 0x70;
1807 }
1808 return 0;
1809
1810 #ifdef NOTMCS7840
1811
1812 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1813 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1814 *divisor = mos7840_divisor_table[i].Divisor;
1815 return 0;
1816 }
1817 }
1818
1819 /* After trying for all the standard baud rates *
1820 * Try calculating the divisor for this baud rate */
1821
1822 if (baudrate > 75 && baudrate < 230400) {
1823 /* get the divisor */
1824 custom = (__u16) (230400L / baudrate);
1825
1826 /* Check for round off */
1827 round1 = (__u16) (2304000L / baudrate);
1828 round = (__u16) (round1 - (custom * 10));
1829 if (round > 4)
1830 custom++;
1831 *divisor = custom;
1832
1833 dbg(" Baud %d = %d", baudrate, custom);
1834 return 0;
1835 }
1836
1837 dbg("%s", " Baud calculation Failed...");
1838 return -1;
1839 #endif
1840 }
1841
1842 /*****************************************************************************
1843 * mos7840_send_cmd_write_baud_rate
1844 * this function sends the proper command to change the baud rate of the
1845 * specified port.
1846 *****************************************************************************/
1847
1848 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1849 int baudRate)
1850 {
1851 int divisor = 0;
1852 int status;
1853 __u16 Data;
1854 unsigned char number;
1855 __u16 clk_sel_val;
1856 struct usb_serial_port *port;
1857
1858 if (mos7840_port == NULL)
1859 return -1;
1860
1861 port = (struct usb_serial_port *)mos7840_port->port;
1862 if (mos7840_port_paranoia_check(port, __func__)) {
1863 dbg("%s", "Invalid port");
1864 return -1;
1865 }
1866
1867 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1868 dbg("%s", "Invalid Serial");
1869 return -1;
1870 }
1871
1872 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1873
1874 dbg("%s - port = %d, baud = %d", __func__,
1875 mos7840_port->port->number, baudRate);
1876 /* reset clk_uart_sel in spregOffset */
1877 if (baudRate > 115200) {
1878 #ifdef HW_flow_control
1879 /* NOTE: need to see the pther register to modify */
1880 /* setting h/w flow control bit to 1 */
1881 Data = 0x2b;
1882 mos7840_port->shadowMCR = Data;
1883 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1884 Data);
1885 if (status < 0) {
1886 dbg("Writing spreg failed in set_serial_baud");
1887 return -1;
1888 }
1889 #endif
1890
1891 } else {
1892 #ifdef HW_flow_control
1893 /* setting h/w flow control bit to 0 */
1894 Data = 0xb;
1895 mos7840_port->shadowMCR = Data;
1896 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1897 Data);
1898 if (status < 0) {
1899 dbg("Writing spreg failed in set_serial_baud");
1900 return -1;
1901 }
1902 #endif
1903
1904 }
1905
1906 if (1) { /* baudRate <= 115200) */
1907 clk_sel_val = 0x0;
1908 Data = 0x0;
1909 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1910 &clk_sel_val);
1911 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1912 &Data);
1913 if (status < 0) {
1914 dbg("reading spreg failed in set_serial_baud");
1915 return -1;
1916 }
1917 Data = (Data & 0x8f) | clk_sel_val;
1918 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1919 Data);
1920 if (status < 0) {
1921 dbg("Writing spreg failed in set_serial_baud");
1922 return -1;
1923 }
1924 /* Calculate the Divisor */
1925
1926 if (status) {
1927 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1928 return status;
1929 }
1930 /* Enable access to divisor latch */
1931 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1932 mos7840_port->shadowLCR = Data;
1933 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1934
1935 /* Write the divisor */
1936 Data = (unsigned char)(divisor & 0xff);
1937 dbg("set_serial_baud Value to write DLL is %x", Data);
1938 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1939
1940 Data = (unsigned char)((divisor & 0xff00) >> 8);
1941 dbg("set_serial_baud Value to write DLM is %x", Data);
1942 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1943
1944 /* Disable access to divisor latch */
1945 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1946 mos7840_port->shadowLCR = Data;
1947 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1948
1949 }
1950 return status;
1951 }
1952
1953 /*****************************************************************************
1954 * mos7840_change_port_settings
1955 * This routine is called to set the UART on the device to match
1956 * the specified new settings.
1957 *****************************************************************************/
1958
1959 static void mos7840_change_port_settings(struct tty_struct *tty,
1960 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1961 {
1962 int baud;
1963 unsigned cflag;
1964 unsigned iflag;
1965 __u8 lData;
1966 __u8 lParity;
1967 __u8 lStop;
1968 int status;
1969 __u16 Data;
1970 struct usb_serial_port *port;
1971 struct usb_serial *serial;
1972
1973 if (mos7840_port == NULL)
1974 return;
1975
1976 port = (struct usb_serial_port *)mos7840_port->port;
1977
1978 if (mos7840_port_paranoia_check(port, __func__)) {
1979 dbg("%s", "Invalid port");
1980 return;
1981 }
1982
1983 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1984 dbg("%s", "Invalid Serial");
1985 return;
1986 }
1987
1988 serial = port->serial;
1989
1990 dbg("%s - port %d", __func__, mos7840_port->port->number);
1991
1992 if (!mos7840_port->open) {
1993 dbg("%s - port not opened", __func__);
1994 return;
1995 }
1996
1997 lData = LCR_BITS_8;
1998 lStop = LCR_STOP_1;
1999 lParity = LCR_PAR_NONE;
2000
2001 cflag = tty->termios->c_cflag;
2002 iflag = tty->termios->c_iflag;
2003
2004 /* Change the number of bits */
2005 if (cflag & CSIZE) {
2006 switch (cflag & CSIZE) {
2007 case CS5:
2008 lData = LCR_BITS_5;
2009 break;
2010
2011 case CS6:
2012 lData = LCR_BITS_6;
2013 break;
2014
2015 case CS7:
2016 lData = LCR_BITS_7;
2017 break;
2018 default:
2019 case CS8:
2020 lData = LCR_BITS_8;
2021 break;
2022 }
2023 }
2024 /* Change the Parity bit */
2025 if (cflag & PARENB) {
2026 if (cflag & PARODD) {
2027 lParity = LCR_PAR_ODD;
2028 dbg("%s - parity = odd", __func__);
2029 } else {
2030 lParity = LCR_PAR_EVEN;
2031 dbg("%s - parity = even", __func__);
2032 }
2033
2034 } else {
2035 dbg("%s - parity = none", __func__);
2036 }
2037
2038 if (cflag & CMSPAR)
2039 lParity = lParity | 0x20;
2040
2041 /* Change the Stop bit */
2042 if (cflag & CSTOPB) {
2043 lStop = LCR_STOP_2;
2044 dbg("%s - stop bits = 2", __func__);
2045 } else {
2046 lStop = LCR_STOP_1;
2047 dbg("%s - stop bits = 1", __func__);
2048 }
2049
2050 /* Update the LCR with the correct value */
2051 mos7840_port->shadowLCR &=
2052 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2053 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2054
2055 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
2056 mos7840_port->shadowLCR);
2057 /* Disable Interrupts */
2058 Data = 0x00;
2059 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2060
2061 Data = 0x00;
2062 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2063
2064 Data = 0xcf;
2065 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2066
2067 /* Send the updated LCR value to the mos7840 */
2068 Data = mos7840_port->shadowLCR;
2069
2070 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2071
2072 Data = 0x00b;
2073 mos7840_port->shadowMCR = Data;
2074 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2075 Data = 0x00b;
2076 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2077
2078 /* set up the MCR register and send it to the mos7840 */
2079
2080 mos7840_port->shadowMCR = MCR_MASTER_IE;
2081 if (cflag & CBAUD)
2082 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2083
2084 if (cflag & CRTSCTS)
2085 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2086 else
2087 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2088
2089 Data = mos7840_port->shadowMCR;
2090 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2091
2092 /* Determine divisor based on baud rate */
2093 baud = tty_get_baud_rate(tty);
2094
2095 if (!baud) {
2096 /* pick a default, any default... */
2097 dbg("%s", "Picked default baud...");
2098 baud = 9600;
2099 }
2100
2101 dbg("%s - baud rate = %d", __func__, baud);
2102 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2103
2104 /* Enable Interrupts */
2105 Data = 0x0c;
2106 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2107
2108 if (mos7840_port->read_urb_busy == false) {
2109 mos7840_port->read_urb_busy = true;
2110 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2111 if (status) {
2112 dbg("usb_submit_urb(read bulk) failed, status = %d",
2113 status);
2114 mos7840_port->read_urb_busy = false;
2115 }
2116 }
2117 wake_up(&mos7840_port->delta_msr_wait);
2118 mos7840_port->delta_msr_cond = 1;
2119 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2120 mos7840_port->shadowLCR);
2121 }
2122
2123 /*****************************************************************************
2124 * mos7840_set_termios
2125 * this function is called by the tty driver when it wants to change
2126 * the termios structure
2127 *****************************************************************************/
2128
2129 static void mos7840_set_termios(struct tty_struct *tty,
2130 struct usb_serial_port *port,
2131 struct ktermios *old_termios)
2132 {
2133 int status;
2134 unsigned int cflag;
2135 struct usb_serial *serial;
2136 struct moschip_port *mos7840_port;
2137
2138 if (mos7840_port_paranoia_check(port, __func__)) {
2139 dbg("%s", "Invalid port");
2140 return;
2141 }
2142
2143 serial = port->serial;
2144
2145 if (mos7840_serial_paranoia_check(serial, __func__)) {
2146 dbg("%s", "Invalid Serial");
2147 return;
2148 }
2149
2150 mos7840_port = mos7840_get_port_private(port);
2151
2152 if (mos7840_port == NULL)
2153 return;
2154
2155 if (!mos7840_port->open) {
2156 dbg("%s - port not opened", __func__);
2157 return;
2158 }
2159
2160 dbg("%s", "setting termios - ");
2161
2162 cflag = tty->termios->c_cflag;
2163
2164 dbg("%s - clfag %08x iflag %08x", __func__,
2165 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2166 dbg("%s - old clfag %08x old iflag %08x", __func__,
2167 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2168 dbg("%s - port %d", __func__, port->number);
2169
2170 /* change the port settings to the new ones specified */
2171
2172 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2173
2174 if (!mos7840_port->read_urb) {
2175 dbg("%s", "URB KILLED !!!!!");
2176 return;
2177 }
2178
2179 if (mos7840_port->read_urb_busy == false) {
2180 mos7840_port->read_urb_busy = true;
2181 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2182 if (status) {
2183 dbg("usb_submit_urb(read bulk) failed, status = %d",
2184 status);
2185 mos7840_port->read_urb_busy = false;
2186 }
2187 }
2188 }
2189
2190 /*****************************************************************************
2191 * mos7840_get_lsr_info - get line status register info
2192 *
2193 * Purpose: Let user call ioctl() to get info when the UART physically
2194 * is emptied. On bus types like RS485, the transmitter must
2195 * release the bus after transmitting. This must be done when
2196 * the transmit shift register is empty, not be done when the
2197 * transmit holding register is empty. This functionality
2198 * allows an RS485 driver to be written in user space.
2199 *****************************************************************************/
2200
2201 static int mos7840_get_lsr_info(struct tty_struct *tty,
2202 unsigned int __user *value)
2203 {
2204 int count;
2205 unsigned int result = 0;
2206
2207 count = mos7840_chars_in_buffer(tty);
2208 if (count == 0) {
2209 dbg("%s -- Empty", __func__);
2210 result = TIOCSER_TEMT;
2211 }
2212
2213 if (copy_to_user(value, &result, sizeof(int)))
2214 return -EFAULT;
2215 return 0;
2216 }
2217
2218 /*****************************************************************************
2219 * mos7840_get_serial_info
2220 * function to get information about serial port
2221 *****************************************************************************/
2222
2223 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2224 struct serial_struct __user *retinfo)
2225 {
2226 struct serial_struct tmp;
2227
2228 if (mos7840_port == NULL)
2229 return -1;
2230
2231 if (!retinfo)
2232 return -EFAULT;
2233
2234 memset(&tmp, 0, sizeof(tmp));
2235
2236 tmp.type = PORT_16550A;
2237 tmp.line = mos7840_port->port->serial->minor;
2238 tmp.port = mos7840_port->port->number;
2239 tmp.irq = 0;
2240 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2241 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2242 tmp.baud_base = 9600;
2243 tmp.close_delay = 5 * HZ;
2244 tmp.closing_wait = 30 * HZ;
2245
2246 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2247 return -EFAULT;
2248 return 0;
2249 }
2250
2251 static int mos7840_get_icount(struct tty_struct *tty,
2252 struct serial_icounter_struct *icount)
2253 {
2254 struct usb_serial_port *port = tty->driver_data;
2255 struct moschip_port *mos7840_port;
2256 struct async_icount cnow;
2257
2258 mos7840_port = mos7840_get_port_private(port);
2259 cnow = mos7840_port->icount;
2260
2261 smp_rmb();
2262 icount->cts = cnow.cts;
2263 icount->dsr = cnow.dsr;
2264 icount->rng = cnow.rng;
2265 icount->dcd = cnow.dcd;
2266 icount->rx = cnow.rx;
2267 icount->tx = cnow.tx;
2268 icount->frame = cnow.frame;
2269 icount->overrun = cnow.overrun;
2270 icount->parity = cnow.parity;
2271 icount->brk = cnow.brk;
2272 icount->buf_overrun = cnow.buf_overrun;
2273
2274 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2275 port->number, icount->rx, icount->tx);
2276 return 0;
2277 }
2278
2279 /*****************************************************************************
2280 * SerialIoctl
2281 * this function handles any ioctl calls to the driver
2282 *****************************************************************************/
2283
2284 static int mos7840_ioctl(struct tty_struct *tty,
2285 unsigned int cmd, unsigned long arg)
2286 {
2287 struct usb_serial_port *port = tty->driver_data;
2288 void __user *argp = (void __user *)arg;
2289 struct moschip_port *mos7840_port;
2290
2291 struct async_icount cnow;
2292 struct async_icount cprev;
2293
2294 if (mos7840_port_paranoia_check(port, __func__)) {
2295 dbg("%s", "Invalid port");
2296 return -1;
2297 }
2298
2299 mos7840_port = mos7840_get_port_private(port);
2300
2301 if (mos7840_port == NULL)
2302 return -1;
2303
2304 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2305
2306 switch (cmd) {
2307 /* return number of bytes available */
2308
2309 case TIOCSERGETLSR:
2310 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
2311 return mos7840_get_lsr_info(tty, argp);
2312
2313 case TIOCGSERIAL:
2314 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
2315 return mos7840_get_serial_info(mos7840_port, argp);
2316
2317 case TIOCSSERIAL:
2318 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
2319 break;
2320
2321 case TIOCMIWAIT:
2322 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
2323 cprev = mos7840_port->icount;
2324 while (1) {
2325 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2326 mos7840_port->delta_msr_cond = 0;
2327 wait_event_interruptible(mos7840_port->delta_msr_wait,
2328 (mos7840_port->
2329 delta_msr_cond == 1));
2330
2331 /* see if a signal did it */
2332 if (signal_pending(current))
2333 return -ERESTARTSYS;
2334 cnow = mos7840_port->icount;
2335 smp_rmb();
2336 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2337 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2338 return -EIO; /* no change => error */
2339 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2340 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2341 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2342 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2343 return 0;
2344 }
2345 cprev = cnow;
2346 }
2347 /* NOTREACHED */
2348 break;
2349
2350 default:
2351 break;
2352 }
2353 return -ENOIOCTLCMD;
2354 }
2355
2356 static int mos7810_check(struct usb_serial *serial)
2357 {
2358 int i, pass_count = 0;
2359 __u16 data = 0, mcr_data = 0;
2360 __u16 test_pattern = 0x55AA;
2361
2362 /* Store MCR setting */
2363 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2364 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2365 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2366
2367 for (i = 0; i < 16; i++) {
2368 /* Send the 1-bit test pattern out to MCS7810 test pin */
2369 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2370 MCS_WRREQ, MCS_WR_RTYPE,
2371 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2372 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2373
2374 /* Read the test pattern back */
2375 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2376 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2377 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2378
2379 /* If this is a MCS7810 device, both test patterns must match */
2380 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2381 break;
2382
2383 pass_count++;
2384 }
2385
2386 /* Restore MCR setting */
2387 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2388 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2389 0, MOS_WDR_TIMEOUT);
2390
2391 if (pass_count == 16)
2392 return 1;
2393
2394 return 0;
2395 }
2396
2397 static int mos7840_calc_num_ports(struct usb_serial *serial)
2398 {
2399 __u16 data = 0x00;
2400 int mos7840_num_ports;
2401
2402 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2403 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2404 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2405
2406 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||
2407 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {
2408 device_type = serial->dev->descriptor.idProduct;
2409 } else {
2410 /* For a MCS7840 device GPIO0 must be set to 1 */
2411 if ((data & 0x01) == 1)
2412 device_type = MOSCHIP_DEVICE_ID_7840;
2413 else if (mos7810_check(serial))
2414 device_type = MOSCHIP_DEVICE_ID_7810;
2415 else
2416 device_type = MOSCHIP_DEVICE_ID_7820;
2417 }
2418
2419 mos7840_num_ports = (device_type >> 4) & 0x000F;
2420 serial->num_bulk_in = mos7840_num_ports;
2421 serial->num_bulk_out = mos7840_num_ports;
2422 serial->num_ports = mos7840_num_ports;
2423
2424 return mos7840_num_ports;
2425 }
2426
2427 /****************************************************************************
2428 * mos7840_startup
2429 ****************************************************************************/
2430
2431 static int mos7840_startup(struct usb_serial *serial)
2432 {
2433 struct moschip_port *mos7840_port;
2434 struct usb_device *dev;
2435 int i, status;
2436 __u16 Data;
2437
2438 if (!serial) {
2439 dbg("%s", "Invalid Handler");
2440 return -1;
2441 }
2442
2443 dev = serial->dev;
2444
2445 /* we set up the pointers to the endpoints in the mos7840_open *
2446 * function, as the structures aren't created yet. */
2447
2448 /* set up port private structures */
2449 for (i = 0; i < serial->num_ports; ++i) {
2450 dbg ("mos7840_startup: configuring port %d............", i);
2451 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2452 if (mos7840_port == NULL) {
2453 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
2454 status = -ENOMEM;
2455 i--; /* don't follow NULL pointer cleaning up */
2456 goto error;
2457 }
2458
2459 /* Initialize all port interrupt end point to port 0 int
2460 * endpoint. Our device has only one interrupt end point
2461 * common to all port */
2462
2463 mos7840_port->port = serial->port[i];
2464 mos7840_set_port_private(serial->port[i], mos7840_port);
2465 spin_lock_init(&mos7840_port->pool_lock);
2466
2467 /* minor is not initialised until later by
2468 * usb-serial.c:get_free_serial() and cannot therefore be used
2469 * to index device instances */
2470 mos7840_port->port_num = i + 1;
2471 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2472 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2473 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2474 dbg ("serial->minor = %d", serial->minor);
2475
2476 if (mos7840_port->port_num == 1) {
2477 mos7840_port->SpRegOffset = 0x0;
2478 mos7840_port->ControlRegOffset = 0x1;
2479 mos7840_port->DcrRegOffset = 0x4;
2480 } else if ((mos7840_port->port_num == 2)
2481 && (serial->num_ports == 4)) {
2482 mos7840_port->SpRegOffset = 0x8;
2483 mos7840_port->ControlRegOffset = 0x9;
2484 mos7840_port->DcrRegOffset = 0x16;
2485 } else if ((mos7840_port->port_num == 2)
2486 && (serial->num_ports == 2)) {
2487 mos7840_port->SpRegOffset = 0xa;
2488 mos7840_port->ControlRegOffset = 0xb;
2489 mos7840_port->DcrRegOffset = 0x19;
2490 } else if ((mos7840_port->port_num == 3)
2491 && (serial->num_ports == 4)) {
2492 mos7840_port->SpRegOffset = 0xa;
2493 mos7840_port->ControlRegOffset = 0xb;
2494 mos7840_port->DcrRegOffset = 0x19;
2495 } else if ((mos7840_port->port_num == 4)
2496 && (serial->num_ports == 4)) {
2497 mos7840_port->SpRegOffset = 0xc;
2498 mos7840_port->ControlRegOffset = 0xd;
2499 mos7840_port->DcrRegOffset = 0x1c;
2500 }
2501 mos7840_dump_serial_port(mos7840_port);
2502 mos7840_set_port_private(serial->port[i], mos7840_port);
2503
2504 /* enable rx_disable bit in control register */
2505 status = mos7840_get_reg_sync(serial->port[i],
2506 mos7840_port->ControlRegOffset, &Data);
2507 if (status < 0) {
2508 dbg("Reading ControlReg failed status-0x%x", status);
2509 break;
2510 } else
2511 dbg("ControlReg Reading success val is %x, status%d",
2512 Data, status);
2513 Data |= 0x08; /* setting driver done bit */
2514 Data |= 0x04; /* sp1_bit to have cts change reflect in
2515 modem status reg */
2516
2517 /* Data |= 0x20; //rx_disable bit */
2518 status = mos7840_set_reg_sync(serial->port[i],
2519 mos7840_port->ControlRegOffset, Data);
2520 if (status < 0) {
2521 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
2522 break;
2523 } else
2524 dbg("ControlReg Writing success(rx_disable) status%d",
2525 status);
2526
2527 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2528 and 0x24 in DCR3 */
2529 Data = 0x01;
2530 status = mos7840_set_reg_sync(serial->port[i],
2531 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2532 if (status < 0) {
2533 dbg("Writing DCR0 failed status-0x%x", status);
2534 break;
2535 } else
2536 dbg("DCR0 Writing success status%d", status);
2537
2538 Data = 0x05;
2539 status = mos7840_set_reg_sync(serial->port[i],
2540 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2541 if (status < 0) {
2542 dbg("Writing DCR1 failed status-0x%x", status);
2543 break;
2544 } else
2545 dbg("DCR1 Writing success status%d", status);
2546
2547 Data = 0x24;
2548 status = mos7840_set_reg_sync(serial->port[i],
2549 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2550 if (status < 0) {
2551 dbg("Writing DCR2 failed status-0x%x", status);
2552 break;
2553 } else
2554 dbg("DCR2 Writing success status%d", status);
2555
2556 /* write values in clkstart0x0 and clkmulti 0x20 */
2557 Data = 0x0;
2558 status = mos7840_set_reg_sync(serial->port[i],
2559 CLK_START_VALUE_REGISTER, Data);
2560 if (status < 0) {
2561 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
2562 break;
2563 } else
2564 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
2565
2566 Data = 0x20;
2567 status = mos7840_set_reg_sync(serial->port[i],
2568 CLK_MULTI_REGISTER, Data);
2569 if (status < 0) {
2570 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2571 status);
2572 goto error;
2573 } else
2574 dbg("CLK_MULTI_REGISTER Writing success status%d",
2575 status);
2576
2577 /* write value 0x0 to scratchpad register */
2578 Data = 0x00;
2579 status = mos7840_set_uart_reg(serial->port[i],
2580 SCRATCH_PAD_REGISTER, Data);
2581 if (status < 0) {
2582 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2583 status);
2584 break;
2585 } else
2586 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2587 status);
2588
2589 /* Zero Length flag register */
2590 if ((mos7840_port->port_num != 1)
2591 && (serial->num_ports == 2)) {
2592
2593 Data = 0xff;
2594 status = mos7840_set_reg_sync(serial->port[i],
2595 (__u16) (ZLP_REG1 +
2596 ((__u16)mos7840_port->port_num)), Data);
2597 dbg("ZLIP offset %x",
2598 (__u16) (ZLP_REG1 +
2599 ((__u16) mos7840_port->port_num)));
2600 if (status < 0) {
2601 dbg("Writing ZLP_REG%d failed status-0x%x",
2602 i + 2, status);
2603 break;
2604 } else
2605 dbg("ZLP_REG%d Writing success status%d",
2606 i + 2, status);
2607 } else {
2608 Data = 0xff;
2609 status = mos7840_set_reg_sync(serial->port[i],
2610 (__u16) (ZLP_REG1 +
2611 ((__u16)mos7840_port->port_num) - 0x1), Data);
2612 dbg("ZLIP offset %x",
2613 (__u16) (ZLP_REG1 +
2614 ((__u16) mos7840_port->port_num) - 0x1));
2615 if (status < 0) {
2616 dbg("Writing ZLP_REG%d failed status-0x%x",
2617 i + 1, status);
2618 break;
2619 } else
2620 dbg("ZLP_REG%d Writing success status%d",
2621 i + 1, status);
2622
2623 }
2624 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2625 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2626 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2627 GFP_KERNEL);
2628 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2629 !mos7840_port->dr) {
2630 status = -ENOMEM;
2631 goto error;
2632 }
2633
2634 mos7840_port->has_led = false;
2635
2636 /* Initialize LED timers */
2637 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2638 mos7840_port->has_led = true;
2639
2640 init_timer(&mos7840_port->led_timer1);
2641 mos7840_port->led_timer1.function = mos7840_led_off;
2642 mos7840_port->led_timer1.expires =
2643 jiffies + msecs_to_jiffies(LED_ON_MS);
2644 mos7840_port->led_timer1.data =
2645 (unsigned long)mos7840_port;
2646
2647 init_timer(&mos7840_port->led_timer2);
2648 mos7840_port->led_timer2.function =
2649 mos7840_led_flag_off;
2650 mos7840_port->led_timer2.expires =
2651 jiffies + msecs_to_jiffies(LED_OFF_MS);
2652 mos7840_port->led_timer2.data =
2653 (unsigned long)mos7840_port;
2654
2655 mos7840_port->led_flag = false;
2656
2657 /* Turn off LED */
2658 mos7840_set_led_sync(serial->port[i],
2659 MODEM_CONTROL_REGISTER, 0x0300);
2660 }
2661 }
2662 dbg ("mos7840_startup: all ports configured...........");
2663
2664 /* Zero Length flag enable */
2665 Data = 0x0f;
2666 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2667 if (status < 0) {
2668 dbg("Writing ZLP_REG5 failed status-0x%x", status);
2669 goto error;
2670 } else
2671 dbg("ZLP_REG5 Writing success status%d", status);
2672
2673 /* setting configuration feature to one */
2674 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2675 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
2676 return 0;
2677 error:
2678 for (/* nothing */; i >= 0; i--) {
2679 mos7840_port = mos7840_get_port_private(serial->port[i]);
2680
2681 kfree(mos7840_port->dr);
2682 kfree(mos7840_port->ctrl_buf);
2683 usb_free_urb(mos7840_port->control_urb);
2684 kfree(mos7840_port);
2685 serial->port[i] = NULL;
2686 }
2687 return status;
2688 }
2689
2690 /****************************************************************************
2691 * mos7840_disconnect
2692 * This function is called whenever the device is removed from the usb bus.
2693 ****************************************************************************/
2694
2695 static void mos7840_disconnect(struct usb_serial *serial)
2696 {
2697 int i;
2698 unsigned long flags;
2699 struct moschip_port *mos7840_port;
2700
2701 if (!serial) {
2702 dbg("%s", "Invalid Handler");
2703 return;
2704 }
2705
2706 /* check for the ports to be closed,close the ports and disconnect */
2707
2708 /* free private structure allocated for serial port *
2709 * stop reads and writes on all ports */
2710
2711 for (i = 0; i < serial->num_ports; ++i) {
2712 mos7840_port = mos7840_get_port_private(serial->port[i]);
2713 dbg ("mos7840_port %d = %p", i, mos7840_port);
2714 if (mos7840_port) {
2715 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2716 mos7840_port->zombie = 1;
2717 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
2718 usb_kill_urb(mos7840_port->control_urb);
2719 }
2720 }
2721 }
2722
2723 /****************************************************************************
2724 * mos7840_release
2725 * This function is called when the usb_serial structure is freed.
2726 ****************************************************************************/
2727
2728 static void mos7840_release(struct usb_serial *serial)
2729 {
2730 int i;
2731 struct moschip_port *mos7840_port;
2732
2733 if (!serial) {
2734 dbg("%s", "Invalid Handler");
2735 return;
2736 }
2737
2738 /* check for the ports to be closed,close the ports and disconnect */
2739
2740 /* free private structure allocated for serial port *
2741 * stop reads and writes on all ports */
2742
2743 for (i = 0; i < serial->num_ports; ++i) {
2744 mos7840_port = mos7840_get_port_private(serial->port[i]);
2745 dbg("mos7840_port %d = %p", i, mos7840_port);
2746 if (mos7840_port) {
2747 if (mos7840_port->has_led) {
2748 /* Turn off LED */
2749 mos7840_set_led_sync(mos7840_port->port,
2750 MODEM_CONTROL_REGISTER, 0x0300);
2751
2752 del_timer_sync(&mos7840_port->led_timer1);
2753 del_timer_sync(&mos7840_port->led_timer2);
2754 }
2755 kfree(mos7840_port->ctrl_buf);
2756 kfree(mos7840_port->dr);
2757 kfree(mos7840_port);
2758 }
2759 }
2760 }
2761
2762 static struct usb_serial_driver moschip7840_4port_device = {
2763 .driver = {
2764 .owner = THIS_MODULE,
2765 .name = "mos7840",
2766 },
2767 .description = DRIVER_DESC,
2768 .id_table = id_table,
2769 .num_ports = 4,
2770 .open = mos7840_open,
2771 .close = mos7840_close,
2772 .write = mos7840_write,
2773 .write_room = mos7840_write_room,
2774 .chars_in_buffer = mos7840_chars_in_buffer,
2775 .throttle = mos7840_throttle,
2776 .unthrottle = mos7840_unthrottle,
2777 .calc_num_ports = mos7840_calc_num_ports,
2778 #ifdef MCSSerialProbe
2779 .probe = mos7840_serial_probe,
2780 #endif
2781 .ioctl = mos7840_ioctl,
2782 .set_termios = mos7840_set_termios,
2783 .break_ctl = mos7840_break,
2784 .tiocmget = mos7840_tiocmget,
2785 .tiocmset = mos7840_tiocmset,
2786 .get_icount = mos7840_get_icount,
2787 .attach = mos7840_startup,
2788 .disconnect = mos7840_disconnect,
2789 .release = mos7840_release,
2790 .read_bulk_callback = mos7840_bulk_in_callback,
2791 .read_int_callback = mos7840_interrupt_callback,
2792 };
2793
2794 static struct usb_serial_driver * const serial_drivers[] = {
2795 &moschip7840_4port_device, NULL
2796 };
2797
2798 module_usb_serial_driver(serial_drivers, id_table);
2799
2800 MODULE_DESCRIPTION(DRIVER_DESC);
2801 MODULE_LICENSE("GPL");
2802
2803 module_param(debug, bool, S_IRUGO | S_IWUSR);
2804 MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux kernel - Deliverables
This page took 0.128263 seconds and 5 git commands to generate.