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USB: mos7840: fix broken TIOCMIWAIT
[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 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
39
40 /*
41 * 16C50 UART register defines
42 */
43
44 #define LCR_BITS_5 0x00 /* 5 bits/char */
45 #define LCR_BITS_6 0x01 /* 6 bits/char */
46 #define LCR_BITS_7 0x02 /* 7 bits/char */
47 #define LCR_BITS_8 0x03 /* 8 bits/char */
48 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
49
50 #define LCR_STOP_1 0x00 /* 1 stop bit */
51 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
52 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
53 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
54
55 #define LCR_PAR_NONE 0x00 /* No parity */
56 #define LCR_PAR_ODD 0x08 /* Odd parity */
57 #define LCR_PAR_EVEN 0x18 /* Even parity */
58 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
59 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
60 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
61
62 #define LCR_SET_BREAK 0x40 /* Set Break condition */
63 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
64
65 #define MCR_DTR 0x01 /* Assert DTR */
66 #define MCR_RTS 0x02 /* Assert RTS */
67 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
68 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
69 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
70 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
71
72 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
73 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
74 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
75 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
76
77 /*
78 * Defines used for sending commands to port
79 */
80
81 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */
82
83 #define MOS_PORT1 0x0200
84 #define MOS_PORT2 0x0300
85 #define MOS_VENREG 0x0000
86 #define MOS_MAX_PORT 0x02
87 #define MOS_WRITE 0x0E
88 #define MOS_READ 0x0D
89
90 /* Requests */
91 #define MCS_RD_RTYPE 0xC0
92 #define MCS_WR_RTYPE 0x40
93 #define MCS_RDREQ 0x0D
94 #define MCS_WRREQ 0x0E
95 #define MCS_CTRL_TIMEOUT 500
96 #define VENDOR_READ_LENGTH (0x01)
97
98 #define MAX_NAME_LEN 64
99
100 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
101 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
102
103 /* For higher baud Rates use TIOCEXBAUD */
104 #define TIOCEXBAUD 0x5462
105
106 /* vendor id and device id defines */
107
108 /* The native mos7840/7820 component */
109 #define USB_VENDOR_ID_MOSCHIP 0x9710
110 #define MOSCHIP_DEVICE_ID_7840 0x7840
111 #define MOSCHIP_DEVICE_ID_7820 0x7820
112 #define MOSCHIP_DEVICE_ID_7810 0x7810
113 /* The native component can have its vendor/device id's overridden
114 * in vendor-specific implementations. Such devices can be handled
115 * by making a change here, in id_table.
116 */
117 #define USB_VENDOR_ID_BANDB 0x0856
118 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
119 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
120 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
121 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
122 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
123 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
124 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
125 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
126 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
127 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
128 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
129 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
130 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
131
132 /* This driver also supports
133 * ATEN UC2324 device using Moschip MCS7840
134 * ATEN UC2322 device using Moschip MCS7820
135 */
136 #define USB_VENDOR_ID_ATENINTL 0x0557
137 #define ATENINTL_DEVICE_ID_UC2324 0x2011
138 #define ATENINTL_DEVICE_ID_UC2322 0x7820
139
140 /* Interrupt Routine Defines */
141
142 #define SERIAL_IIR_RLS 0x06
143 #define SERIAL_IIR_MS 0x00
144
145 /*
146 * Emulation of the bit mask on the LINE STATUS REGISTER.
147 */
148 #define SERIAL_LSR_DR 0x0001
149 #define SERIAL_LSR_OE 0x0002
150 #define SERIAL_LSR_PE 0x0004
151 #define SERIAL_LSR_FE 0x0008
152 #define SERIAL_LSR_BI 0x0010
153
154 #define MOS_MSR_DELTA_CTS 0x10
155 #define MOS_MSR_DELTA_DSR 0x20
156 #define MOS_MSR_DELTA_RI 0x40
157 #define MOS_MSR_DELTA_CD 0x80
158
159 /* Serial Port register Address */
160 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
161 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
162 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
163 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
164 #define LINE_STATUS_REGISTER ((__u16)(0x05))
165 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
166 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
167 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
168 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
169
170 #define CLK_MULTI_REGISTER ((__u16)(0x02))
171 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
172 #define GPIO_REGISTER ((__u16)(0x07))
173
174 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
175
176 /*
177 * URB POOL related defines
178 */
179 #define NUM_URBS 16 /* URB Count */
180 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
181
182 /* LED on/off milliseconds*/
183 #define LED_ON_MS 500
184 #define LED_OFF_MS 500
185
186 static int device_type;
187
188 static const struct usb_device_id 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_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
205 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
206 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
207 {} /* terminating entry */
208 };
209 MODULE_DEVICE_TABLE(usb, id_table);
210
211 /* This structure holds all of the local port information */
212
213 struct moschip_port {
214 int port_num; /*Actual port number in the device(1,2,etc) */
215 struct urb *write_urb; /* write URB for this port */
216 struct urb *read_urb; /* read URB for this port */
217 __u8 shadowLCR; /* last LCR value received */
218 __u8 shadowMCR; /* last MCR value received */
219 char open;
220 char open_ports;
221 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
222 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
223 int delta_msr_cond;
224 struct async_icount icount;
225 struct usb_serial_port *port; /* loop back to the owner of this object */
226
227 /* Offsets */
228 __u8 SpRegOffset;
229 __u8 ControlRegOffset;
230 __u8 DcrRegOffset;
231 /* for processing control URBS in interrupt context */
232 struct urb *control_urb;
233 struct usb_ctrlrequest *dr;
234 char *ctrl_buf;
235 int MsrLsr;
236
237 spinlock_t pool_lock;
238 struct urb *write_urb_pool[NUM_URBS];
239 char busy[NUM_URBS];
240 bool read_urb_busy;
241
242 /* For device(s) with LED indicator */
243 bool has_led;
244 bool led_flag;
245 struct timer_list led_timer1; /* Timer for LED on */
246 struct timer_list led_timer2; /* Timer for LED off */
247 };
248
249 /*
250 * mos7840_set_reg_sync
251 * To set the Control register by calling usb_fill_control_urb function
252 * by passing usb_sndctrlpipe function as parameter.
253 */
254
255 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
256 __u16 val)
257 {
258 struct usb_device *dev = port->serial->dev;
259 val = val & 0x00ff;
260 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
261
262 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
263 MCS_WR_RTYPE, val, reg, NULL, 0,
264 MOS_WDR_TIMEOUT);
265 }
266
267 /*
268 * mos7840_get_reg_sync
269 * To set the Uart register by calling usb_fill_control_urb function by
270 * passing usb_rcvctrlpipe function as parameter.
271 */
272
273 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
274 __u16 *val)
275 {
276 struct usb_device *dev = port->serial->dev;
277 int ret = 0;
278 u8 *buf;
279
280 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
281 if (!buf)
282 return -ENOMEM;
283
284 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
285 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
286 MOS_WDR_TIMEOUT);
287 *val = buf[0];
288 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
289
290 kfree(buf);
291 return ret;
292 }
293
294 /*
295 * mos7840_set_uart_reg
296 * To set the Uart register by calling usb_fill_control_urb function by
297 * passing usb_sndctrlpipe function as parameter.
298 */
299
300 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
301 __u16 val)
302 {
303
304 struct usb_device *dev = port->serial->dev;
305 val = val & 0x00ff;
306 /* For the UART control registers, the application number need
307 to be Or'ed */
308 if (port->serial->num_ports == 4) {
309 val |= (((__u16) port->number -
310 (__u16) (port->serial->minor)) + 1) << 8;
311 } else {
312 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
313 val |= (((__u16) port->number -
314 (__u16) (port->serial->minor)) + 1) << 8;
315 } else {
316 val |= (((__u16) port->number -
317 (__u16) (port->serial->minor)) + 2) << 8;
318 }
319 }
320 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
321 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
322 MCS_WR_RTYPE, val, reg, NULL, 0,
323 MOS_WDR_TIMEOUT);
324
325 }
326
327 /*
328 * mos7840_get_uart_reg
329 * To set the Control register by calling usb_fill_control_urb function
330 * by passing usb_rcvctrlpipe function as parameter.
331 */
332 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
333 __u16 *val)
334 {
335 struct usb_device *dev = port->serial->dev;
336 int ret = 0;
337 __u16 Wval;
338 u8 *buf;
339
340 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
341 if (!buf)
342 return -ENOMEM;
343
344 /* Wval is same as application number */
345 if (port->serial->num_ports == 4) {
346 Wval =
347 (((__u16) port->number - (__u16) (port->serial->minor)) +
348 1) << 8;
349 } else {
350 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
351 Wval = (((__u16) port->number -
352 (__u16) (port->serial->minor)) + 1) << 8;
353 } else {
354 Wval = (((__u16) port->number -
355 (__u16) (port->serial->minor)) + 2) << 8;
356 }
357 }
358 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
359 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
360 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
361 MOS_WDR_TIMEOUT);
362 *val = buf[0];
363
364 kfree(buf);
365 return ret;
366 }
367
368 static void mos7840_dump_serial_port(struct usb_serial_port *port,
369 struct moschip_port *mos7840_port)
370 {
371
372 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
373 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
374 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
375
376 }
377
378 /************************************************************************/
379 /************************************************************************/
380 /* I N T E R F A C E F U N C T I O N S */
381 /* I N T E R F A C E F U N C T I O N S */
382 /************************************************************************/
383 /************************************************************************/
384
385 static inline void mos7840_set_port_private(struct usb_serial_port *port,
386 struct moschip_port *data)
387 {
388 usb_set_serial_port_data(port, (void *)data);
389 }
390
391 static inline struct moschip_port *mos7840_get_port_private(struct
392 usb_serial_port
393 *port)
394 {
395 return (struct moschip_port *)usb_get_serial_port_data(port);
396 }
397
398 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
399 {
400 struct moschip_port *mos7840_port;
401 struct async_icount *icount;
402 mos7840_port = port;
403 icount = &mos7840_port->icount;
404 if (new_msr &
405 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
406 MOS_MSR_DELTA_CD)) {
407 icount = &mos7840_port->icount;
408
409 /* update input line counters */
410 if (new_msr & MOS_MSR_DELTA_CTS) {
411 icount->cts++;
412 smp_wmb();
413 }
414 if (new_msr & MOS_MSR_DELTA_DSR) {
415 icount->dsr++;
416 smp_wmb();
417 }
418 if (new_msr & MOS_MSR_DELTA_CD) {
419 icount->dcd++;
420 smp_wmb();
421 }
422 if (new_msr & MOS_MSR_DELTA_RI) {
423 icount->rng++;
424 smp_wmb();
425 }
426
427 mos7840_port->delta_msr_cond = 1;
428 wake_up_interruptible(&mos7840_port->delta_msr_wait);
429 }
430 }
431
432 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
433 {
434 struct async_icount *icount;
435
436 if (new_lsr & SERIAL_LSR_BI) {
437 /*
438 * Parity and Framing errors only count if they
439 * occur exclusive of a break being
440 * received.
441 */
442 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
443 }
444
445 /* update input line counters */
446 icount = &port->icount;
447 if (new_lsr & SERIAL_LSR_BI) {
448 icount->brk++;
449 smp_wmb();
450 }
451 if (new_lsr & SERIAL_LSR_OE) {
452 icount->overrun++;
453 smp_wmb();
454 }
455 if (new_lsr & SERIAL_LSR_PE) {
456 icount->parity++;
457 smp_wmb();
458 }
459 if (new_lsr & SERIAL_LSR_FE) {
460 icount->frame++;
461 smp_wmb();
462 }
463 }
464
465 /************************************************************************/
466 /************************************************************************/
467 /* U S B C A L L B A C K F U N C T I O N S */
468 /* U S B C A L L B A C K F U N C T I O N S */
469 /************************************************************************/
470 /************************************************************************/
471
472 static void mos7840_control_callback(struct urb *urb)
473 {
474 unsigned char *data;
475 struct moschip_port *mos7840_port;
476 struct device *dev = &urb->dev->dev;
477 __u8 regval = 0x0;
478 int status = urb->status;
479
480 mos7840_port = urb->context;
481
482 switch (status) {
483 case 0:
484 /* success */
485 break;
486 case -ECONNRESET:
487 case -ENOENT:
488 case -ESHUTDOWN:
489 /* this urb is terminated, clean up */
490 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
491 return;
492 default:
493 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
494 return;
495 }
496
497 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
498 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
499 mos7840_port->MsrLsr, mos7840_port->port_num);
500 data = urb->transfer_buffer;
501 regval = (__u8) data[0];
502 dev_dbg(dev, "%s data is %x\n", __func__, regval);
503 if (mos7840_port->MsrLsr == 0)
504 mos7840_handle_new_msr(mos7840_port, regval);
505 else if (mos7840_port->MsrLsr == 1)
506 mos7840_handle_new_lsr(mos7840_port, regval);
507 }
508
509 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
510 __u16 *val)
511 {
512 struct usb_device *dev = mcs->port->serial->dev;
513 struct usb_ctrlrequest *dr = mcs->dr;
514 unsigned char *buffer = mcs->ctrl_buf;
515 int ret;
516
517 dr->bRequestType = MCS_RD_RTYPE;
518 dr->bRequest = MCS_RDREQ;
519 dr->wValue = cpu_to_le16(Wval); /* 0 */
520 dr->wIndex = cpu_to_le16(reg);
521 dr->wLength = cpu_to_le16(2);
522
523 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
524 (unsigned char *)dr, buffer, 2,
525 mos7840_control_callback, mcs);
526 mcs->control_urb->transfer_buffer_length = 2;
527 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
528 return ret;
529 }
530
531 static void mos7840_set_led_callback(struct urb *urb)
532 {
533 switch (urb->status) {
534 case 0:
535 /* Success */
536 break;
537 case -ECONNRESET:
538 case -ENOENT:
539 case -ESHUTDOWN:
540 /* This urb is terminated, clean up */
541 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
542 __func__, urb->status);
543 break;
544 default:
545 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
546 __func__, urb->status);
547 }
548 }
549
550 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
551 __u16 reg)
552 {
553 struct usb_device *dev = mcs->port->serial->dev;
554 struct usb_ctrlrequest *dr = mcs->dr;
555
556 dr->bRequestType = MCS_WR_RTYPE;
557 dr->bRequest = MCS_WRREQ;
558 dr->wValue = cpu_to_le16(wval);
559 dr->wIndex = cpu_to_le16(reg);
560 dr->wLength = cpu_to_le16(0);
561
562 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),
563 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
564
565 usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
566 }
567
568 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
569 __u16 val)
570 {
571 struct usb_device *dev = port->serial->dev;
572
573 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
574 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
575 }
576
577 static void mos7840_led_off(unsigned long arg)
578 {
579 struct moschip_port *mcs = (struct moschip_port *) arg;
580
581 /* Turn off LED */
582 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
583 mod_timer(&mcs->led_timer2,
584 jiffies + msecs_to_jiffies(LED_OFF_MS));
585 }
586
587 static void mos7840_led_flag_off(unsigned long arg)
588 {
589 struct moschip_port *mcs = (struct moschip_port *) arg;
590
591 mcs->led_flag = false;
592 }
593
594 /*****************************************************************************
595 * mos7840_interrupt_callback
596 * this is the callback function for when we have received data on the
597 * interrupt endpoint.
598 *****************************************************************************/
599
600 static void mos7840_interrupt_callback(struct urb *urb)
601 {
602 int result;
603 int length;
604 struct moschip_port *mos7840_port;
605 struct usb_serial *serial;
606 __u16 Data;
607 unsigned char *data;
608 __u8 sp[5], st;
609 int i, rv = 0;
610 __u16 wval, wreg = 0;
611 int status = urb->status;
612
613 switch (status) {
614 case 0:
615 /* success */
616 break;
617 case -ECONNRESET:
618 case -ENOENT:
619 case -ESHUTDOWN:
620 /* this urb is terminated, clean up */
621 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
622 __func__, status);
623 return;
624 default:
625 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
626 __func__, status);
627 goto exit;
628 }
629
630 length = urb->actual_length;
631 data = urb->transfer_buffer;
632
633 serial = urb->context;
634
635 /* Moschip get 5 bytes
636 * Byte 1 IIR Port 1 (port.number is 0)
637 * Byte 2 IIR Port 2 (port.number is 1)
638 * Byte 3 IIR Port 3 (port.number is 2)
639 * Byte 4 IIR Port 4 (port.number is 3)
640 * Byte 5 FIFO status for both */
641
642 if (length && length > 5) {
643 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
644 return;
645 }
646
647 sp[0] = (__u8) data[0];
648 sp[1] = (__u8) data[1];
649 sp[2] = (__u8) data[2];
650 sp[3] = (__u8) data[3];
651 st = (__u8) data[4];
652
653 for (i = 0; i < serial->num_ports; i++) {
654 mos7840_port = mos7840_get_port_private(serial->port[i]);
655 wval =
656 (((__u16) serial->port[i]->number -
657 (__u16) (serial->minor)) + 1) << 8;
658 if (mos7840_port->open) {
659 if (sp[i] & 0x01) {
660 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
661 } else {
662 switch (sp[i] & 0x0f) {
663 case SERIAL_IIR_RLS:
664 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
665 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
666 mos7840_port->MsrLsr = 1;
667 wreg = LINE_STATUS_REGISTER;
668 break;
669 case SERIAL_IIR_MS:
670 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
671 mos7840_port->MsrLsr = 0;
672 wreg = MODEM_STATUS_REGISTER;
673 break;
674 }
675 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
676 }
677 }
678 }
679 if (!(rv < 0))
680 /* the completion handler for the control urb will resubmit */
681 return;
682 exit:
683 result = usb_submit_urb(urb, GFP_ATOMIC);
684 if (result) {
685 dev_err(&urb->dev->dev,
686 "%s - Error %d submitting interrupt urb\n",
687 __func__, result);
688 }
689 }
690
691 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
692 const char *function)
693 {
694 if (!port) {
695 pr_debug("%s - port == NULL\n", function);
696 return -1;
697 }
698 if (!port->serial) {
699 pr_debug("%s - port->serial == NULL\n", function);
700 return -1;
701 }
702
703 return 0;
704 }
705
706 /* Inline functions to check the sanity of a pointer that is passed to us */
707 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
708 const char *function)
709 {
710 if (!serial) {
711 pr_debug("%s - serial == NULL\n", function);
712 return -1;
713 }
714 if (!serial->type) {
715 pr_debug("%s - serial->type == NULL!\n", function);
716 return -1;
717 }
718
719 return 0;
720 }
721
722 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
723 const char *function)
724 {
725 /* if no port was specified, or it fails a paranoia check */
726 if (!port ||
727 mos7840_port_paranoia_check(port, function) ||
728 mos7840_serial_paranoia_check(port->serial, function)) {
729 /* then say that we don't have a valid usb_serial thing,
730 * which will end up genrating -ENODEV return values */
731 return NULL;
732 }
733
734 return port->serial;
735 }
736
737 /*****************************************************************************
738 * mos7840_bulk_in_callback
739 * this is the callback function for when we have received data on the
740 * bulk in endpoint.
741 *****************************************************************************/
742
743 static void mos7840_bulk_in_callback(struct urb *urb)
744 {
745 int retval;
746 unsigned char *data;
747 struct usb_serial *serial;
748 struct usb_serial_port *port;
749 struct moschip_port *mos7840_port;
750 int status = urb->status;
751
752 mos7840_port = urb->context;
753 if (!mos7840_port)
754 return;
755
756 if (status) {
757 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
758 mos7840_port->read_urb_busy = false;
759 return;
760 }
761
762 port = mos7840_port->port;
763 if (mos7840_port_paranoia_check(port, __func__)) {
764 mos7840_port->read_urb_busy = false;
765 return;
766 }
767
768 serial = mos7840_get_usb_serial(port, __func__);
769 if (!serial) {
770 mos7840_port->read_urb_busy = false;
771 return;
772 }
773
774 data = urb->transfer_buffer;
775 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
776
777 if (urb->actual_length) {
778 struct tty_port *tport = &mos7840_port->port->port;
779 tty_insert_flip_string(tport, data, urb->actual_length);
780 tty_flip_buffer_push(tport);
781 mos7840_port->icount.rx += urb->actual_length;
782 smp_wmb();
783 dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx);
784 }
785
786 if (!mos7840_port->read_urb) {
787 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
788 mos7840_port->read_urb_busy = false;
789 return;
790 }
791
792 /* Turn on LED */
793 if (mos7840_port->has_led && !mos7840_port->led_flag) {
794 mos7840_port->led_flag = true;
795 mos7840_set_led_async(mos7840_port, 0x0301,
796 MODEM_CONTROL_REGISTER);
797 mod_timer(&mos7840_port->led_timer1,
798 jiffies + msecs_to_jiffies(LED_ON_MS));
799 }
800
801 mos7840_port->read_urb_busy = true;
802 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
803
804 if (retval) {
805 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
806 mos7840_port->read_urb_busy = false;
807 }
808 }
809
810 /*****************************************************************************
811 * mos7840_bulk_out_data_callback
812 * this is the callback function for when we have finished sending
813 * serial data on the bulk out endpoint.
814 *****************************************************************************/
815
816 static void mos7840_bulk_out_data_callback(struct urb *urb)
817 {
818 struct moschip_port *mos7840_port;
819 struct usb_serial_port *port;
820 struct tty_struct *tty;
821 int status = urb->status;
822 int i;
823
824 mos7840_port = urb->context;
825 port = mos7840_port->port;
826 spin_lock(&mos7840_port->pool_lock);
827 for (i = 0; i < NUM_URBS; i++) {
828 if (urb == mos7840_port->write_urb_pool[i]) {
829 mos7840_port->busy[i] = 0;
830 break;
831 }
832 }
833 spin_unlock(&mos7840_port->pool_lock);
834
835 if (status) {
836 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
837 return;
838 }
839
840 if (mos7840_port_paranoia_check(port, __func__))
841 return;
842
843 tty = tty_port_tty_get(&port->port);
844 if (tty && mos7840_port->open)
845 tty_wakeup(tty);
846 tty_kref_put(tty);
847
848 }
849
850 /************************************************************************/
851 /* 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 */
852 /************************************************************************/
853 #ifdef MCSSerialProbe
854 static int mos7840_serial_probe(struct usb_serial *serial,
855 const struct usb_device_id *id)
856 {
857
858 /*need to implement the mode_reg reading and updating\
859 structures usb_serial_ device_type\
860 (i.e num_ports, num_bulkin,bulkout etc) */
861 /* Also we can update the changes attach */
862 return 1;
863 }
864 #endif
865
866 /*****************************************************************************
867 * mos7840_open
868 * this function is called by the tty driver when a port is opened
869 * If successful, we return 0
870 * Otherwise we return a negative error number.
871 *****************************************************************************/
872
873 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
874 {
875 int response;
876 int j;
877 struct usb_serial *serial;
878 struct urb *urb;
879 __u16 Data;
880 int status;
881 struct moschip_port *mos7840_port;
882 struct moschip_port *port0;
883
884 if (mos7840_port_paranoia_check(port, __func__))
885 return -ENODEV;
886
887 serial = port->serial;
888
889 if (mos7840_serial_paranoia_check(serial, __func__))
890 return -ENODEV;
891
892 mos7840_port = mos7840_get_port_private(port);
893 port0 = mos7840_get_port_private(serial->port[0]);
894
895 if (mos7840_port == NULL || port0 == NULL)
896 return -ENODEV;
897
898 usb_clear_halt(serial->dev, port->write_urb->pipe);
899 usb_clear_halt(serial->dev, port->read_urb->pipe);
900 port0->open_ports++;
901
902 /* Initialising the write urb pool */
903 for (j = 0; j < NUM_URBS; ++j) {
904 urb = usb_alloc_urb(0, GFP_KERNEL);
905 mos7840_port->write_urb_pool[j] = urb;
906
907 if (urb == NULL) {
908 dev_err(&port->dev, "No more urbs???\n");
909 continue;
910 }
911
912 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
913 GFP_KERNEL);
914 if (!urb->transfer_buffer) {
915 usb_free_urb(urb);
916 mos7840_port->write_urb_pool[j] = NULL;
917 dev_err(&port->dev,
918 "%s-out of memory for urb buffers.\n",
919 __func__);
920 continue;
921 }
922 }
923
924 /*****************************************************************************
925 * Initialize MCS7840 -- Write Init values to corresponding Registers
926 *
927 * Register Index
928 * 1 : IER
929 * 2 : FCR
930 * 3 : LCR
931 * 4 : MCR
932 *
933 * 0x08 : SP1/2 Control Reg
934 *****************************************************************************/
935
936 /* NEED to check the following Block */
937
938 Data = 0x0;
939 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
940 if (status < 0) {
941 dev_dbg(&port->dev, "Reading Spreg failed\n");
942 return -1;
943 }
944 Data |= 0x80;
945 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
946 if (status < 0) {
947 dev_dbg(&port->dev, "writing Spreg failed\n");
948 return -1;
949 }
950
951 Data &= ~0x80;
952 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
953 if (status < 0) {
954 dev_dbg(&port->dev, "writing Spreg failed\n");
955 return -1;
956 }
957 /* End of block to be checked */
958
959 Data = 0x0;
960 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
961 &Data);
962 if (status < 0) {
963 dev_dbg(&port->dev, "Reading Controlreg failed\n");
964 return -1;
965 }
966 Data |= 0x08; /* Driver done bit */
967 Data |= 0x20; /* rx_disable */
968 status = mos7840_set_reg_sync(port,
969 mos7840_port->ControlRegOffset, Data);
970 if (status < 0) {
971 dev_dbg(&port->dev, "writing Controlreg failed\n");
972 return -1;
973 }
974 /* do register settings here */
975 /* Set all regs to the device default values. */
976 /***********************************
977 * First Disable all interrupts.
978 ***********************************/
979 Data = 0x00;
980 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
981 if (status < 0) {
982 dev_dbg(&port->dev, "disabling interrupts failed\n");
983 return -1;
984 }
985 /* Set FIFO_CONTROL_REGISTER to the default value */
986 Data = 0x00;
987 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
988 if (status < 0) {
989 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
990 return -1;
991 }
992
993 Data = 0xcf;
994 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
995 if (status < 0) {
996 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
997 return -1;
998 }
999
1000 Data = 0x03;
1001 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1002 mos7840_port->shadowLCR = Data;
1003
1004 Data = 0x0b;
1005 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1006 mos7840_port->shadowMCR = Data;
1007
1008 Data = 0x00;
1009 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1010 mos7840_port->shadowLCR = Data;
1011
1012 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1013 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1014
1015 Data = 0x0c;
1016 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1017
1018 Data = 0x0;
1019 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1020
1021 Data = 0x00;
1022 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1023
1024 Data = Data & ~SERIAL_LCR_DLAB;
1025 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1026 mos7840_port->shadowLCR = Data;
1027
1028 /* clearing Bulkin and Bulkout Fifo */
1029 Data = 0x0;
1030 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1031
1032 Data = Data | 0x0c;
1033 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1034
1035 Data = Data & ~0x0c;
1036 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1037 /* Finally enable all interrupts */
1038 Data = 0x0c;
1039 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1040
1041 /* clearing rx_disable */
1042 Data = 0x0;
1043 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1044 &Data);
1045 Data = Data & ~0x20;
1046 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1047 Data);
1048
1049 /* rx_negate */
1050 Data = 0x0;
1051 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1052 &Data);
1053 Data = Data | 0x10;
1054 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1055 Data);
1056
1057 /* Check to see if we've set up our endpoint info yet *
1058 * (can't set it up in mos7840_startup as the structures *
1059 * were not set up at that time.) */
1060 if (port0->open_ports == 1) {
1061 if (serial->port[0]->interrupt_in_buffer == NULL) {
1062 /* set up interrupt urb */
1063 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1064 serial->dev,
1065 usb_rcvintpipe(serial->dev,
1066 serial->port[0]->interrupt_in_endpointAddress),
1067 serial->port[0]->interrupt_in_buffer,
1068 serial->port[0]->interrupt_in_urb->
1069 transfer_buffer_length,
1070 mos7840_interrupt_callback,
1071 serial,
1072 serial->port[0]->interrupt_in_urb->interval);
1073
1074 /* start interrupt read for mos7840 *
1075 * will continue as long as mos7840 is connected */
1076
1077 response =
1078 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1079 GFP_KERNEL);
1080 if (response) {
1081 dev_err(&port->dev, "%s - Error %d submitting "
1082 "interrupt urb\n", __func__, response);
1083 }
1084
1085 }
1086
1087 }
1088
1089 /* see if we've set up our endpoint info yet *
1090 * (can't set it up in mos7840_startup as the *
1091 * structures were not set up at that time.) */
1092
1093 dev_dbg(&port->dev, "port number is %d\n", port->number);
1094 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor);
1095 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1096 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1097 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1098 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
1099 mos7840_port->read_urb = port->read_urb;
1100
1101 /* set up our bulk in urb */
1102 if ((serial->num_ports == 2)
1103 && ((((__u16)port->number -
1104 (__u16)(port->serial->minor)) % 2) != 0)) {
1105 usb_fill_bulk_urb(mos7840_port->read_urb,
1106 serial->dev,
1107 usb_rcvbulkpipe(serial->dev,
1108 (port->bulk_in_endpointAddress) + 2),
1109 port->bulk_in_buffer,
1110 mos7840_port->read_urb->transfer_buffer_length,
1111 mos7840_bulk_in_callback, mos7840_port);
1112 } else {
1113 usb_fill_bulk_urb(mos7840_port->read_urb,
1114 serial->dev,
1115 usb_rcvbulkpipe(serial->dev,
1116 port->bulk_in_endpointAddress),
1117 port->bulk_in_buffer,
1118 mos7840_port->read_urb->transfer_buffer_length,
1119 mos7840_bulk_in_callback, mos7840_port);
1120 }
1121
1122 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
1123 mos7840_port->read_urb_busy = true;
1124 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1125 if (response) {
1126 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1127 __func__, response);
1128 mos7840_port->read_urb_busy = false;
1129 }
1130
1131 /* initialize our wait queues */
1132 init_waitqueue_head(&mos7840_port->wait_chase);
1133 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1134
1135 /* initialize our icount structure */
1136 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1137
1138 /* initialize our port settings */
1139 /* Must set to enable ints! */
1140 mos7840_port->shadowMCR = MCR_MASTER_IE;
1141 /* send a open port command */
1142 mos7840_port->open = 1;
1143 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1144 mos7840_port->icount.tx = 0;
1145 mos7840_port->icount.rx = 0;
1146
1147 return 0;
1148 }
1149
1150 /*****************************************************************************
1151 * mos7840_chars_in_buffer
1152 * this function is called by the tty driver when it wants to know how many
1153 * bytes of data we currently have outstanding in the port (data that has
1154 * been written, but hasn't made it out the port yet)
1155 * If successful, we return the number of bytes left to be written in the
1156 * system,
1157 * Otherwise we return zero.
1158 *****************************************************************************/
1159
1160 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1161 {
1162 struct usb_serial_port *port = tty->driver_data;
1163 int i;
1164 int chars = 0;
1165 unsigned long flags;
1166 struct moschip_port *mos7840_port;
1167
1168 if (mos7840_port_paranoia_check(port, __func__))
1169 return 0;
1170
1171 mos7840_port = mos7840_get_port_private(port);
1172 if (mos7840_port == NULL)
1173 return 0;
1174
1175 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1176 for (i = 0; i < NUM_URBS; ++i) {
1177 if (mos7840_port->busy[i]) {
1178 struct urb *urb = mos7840_port->write_urb_pool[i];
1179 chars += urb->transfer_buffer_length;
1180 }
1181 }
1182 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1183 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1184 return chars;
1185
1186 }
1187
1188 /*****************************************************************************
1189 * mos7840_close
1190 * this function is called by the tty driver when a port is closed
1191 *****************************************************************************/
1192
1193 static void mos7840_close(struct usb_serial_port *port)
1194 {
1195 struct usb_serial *serial;
1196 struct moschip_port *mos7840_port;
1197 struct moschip_port *port0;
1198 int j;
1199 __u16 Data;
1200
1201 if (mos7840_port_paranoia_check(port, __func__))
1202 return;
1203
1204 serial = mos7840_get_usb_serial(port, __func__);
1205 if (!serial)
1206 return;
1207
1208 mos7840_port = mos7840_get_port_private(port);
1209 port0 = mos7840_get_port_private(serial->port[0]);
1210
1211 if (mos7840_port == NULL || port0 == NULL)
1212 return;
1213
1214 for (j = 0; j < NUM_URBS; ++j)
1215 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1216
1217 /* Freeing Write URBs */
1218 for (j = 0; j < NUM_URBS; ++j) {
1219 if (mos7840_port->write_urb_pool[j]) {
1220 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1221 kfree(mos7840_port->write_urb_pool[j]->
1222 transfer_buffer);
1223
1224 usb_free_urb(mos7840_port->write_urb_pool[j]);
1225 }
1226 }
1227
1228 /* While closing port, shutdown all bulk read, write *
1229 * and interrupt read if they exists */
1230 if (serial->dev) {
1231 if (mos7840_port->write_urb) {
1232 dev_dbg(&port->dev, "%s", "Shutdown bulk write\n");
1233 usb_kill_urb(mos7840_port->write_urb);
1234 }
1235 if (mos7840_port->read_urb) {
1236 dev_dbg(&port->dev, "%s", "Shutdown bulk read\n");
1237 usb_kill_urb(mos7840_port->read_urb);
1238 mos7840_port->read_urb_busy = false;
1239 }
1240 if ((&mos7840_port->control_urb)) {
1241 dev_dbg(&port->dev, "%s", "Shutdown control read\n");
1242 /*/ usb_kill_urb (mos7840_port->control_urb); */
1243 }
1244 }
1245 /* if(mos7840_port->ctrl_buf != NULL) */
1246 /* kfree(mos7840_port->ctrl_buf); */
1247 port0->open_ports--;
1248 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number);
1249 if (port0->open_ports == 0) {
1250 if (serial->port[0]->interrupt_in_urb) {
1251 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
1252 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1253 }
1254 }
1255
1256 if (mos7840_port->write_urb) {
1257 /* if this urb had a transfer buffer already (old tx) free it */
1258 if (mos7840_port->write_urb->transfer_buffer != NULL)
1259 kfree(mos7840_port->write_urb->transfer_buffer);
1260 usb_free_urb(mos7840_port->write_urb);
1261 }
1262
1263 Data = 0x0;
1264 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1265
1266 Data = 0x00;
1267 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1268
1269 mos7840_port->open = 0;
1270 }
1271
1272 /************************************************************************
1273 *
1274 * mos7840_block_until_chase_response
1275 *
1276 * This function will block the close until one of the following:
1277 * 1. Response to our Chase comes from mos7840
1278 * 2. A timeout of 10 seconds without activity has expired
1279 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1280 *
1281 ************************************************************************/
1282
1283 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1284 struct moschip_port *mos7840_port)
1285 {
1286 int timeout = msecs_to_jiffies(1000);
1287 int wait = 10;
1288 int count;
1289
1290 while (1) {
1291 count = mos7840_chars_in_buffer(tty);
1292
1293 /* Check for Buffer status */
1294 if (count <= 0)
1295 return;
1296
1297 /* Block the thread for a while */
1298 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1299 timeout);
1300 /* No activity.. count down section */
1301 wait--;
1302 if (wait == 0) {
1303 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__);
1304 return;
1305 } else {
1306 /* Reset timeout value back to seconds */
1307 wait = 10;
1308 }
1309 }
1310
1311 }
1312
1313 /*****************************************************************************
1314 * mos7840_break
1315 * this function sends a break to the port
1316 *****************************************************************************/
1317 static void mos7840_break(struct tty_struct *tty, int break_state)
1318 {
1319 struct usb_serial_port *port = tty->driver_data;
1320 unsigned char data;
1321 struct usb_serial *serial;
1322 struct moschip_port *mos7840_port;
1323
1324 if (mos7840_port_paranoia_check(port, __func__))
1325 return;
1326
1327 serial = mos7840_get_usb_serial(port, __func__);
1328 if (!serial)
1329 return;
1330
1331 mos7840_port = mos7840_get_port_private(port);
1332
1333 if (mos7840_port == NULL)
1334 return;
1335
1336 if (serial->dev)
1337 /* flush and block until tx is empty */
1338 mos7840_block_until_chase_response(tty, mos7840_port);
1339
1340 if (break_state == -1)
1341 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1342 else
1343 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1344
1345 /* FIXME: no locking on shadowLCR anywhere in driver */
1346 mos7840_port->shadowLCR = data;
1347 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1348 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1349 mos7840_port->shadowLCR);
1350 }
1351
1352 /*****************************************************************************
1353 * mos7840_write_room
1354 * this function is called by the tty driver when it wants to know how many
1355 * bytes of data we can accept for a specific port.
1356 * If successful, we return the amount of room that we have for this port
1357 * Otherwise we return a negative error number.
1358 *****************************************************************************/
1359
1360 static int mos7840_write_room(struct tty_struct *tty)
1361 {
1362 struct usb_serial_port *port = tty->driver_data;
1363 int i;
1364 int room = 0;
1365 unsigned long flags;
1366 struct moschip_port *mos7840_port;
1367
1368 if (mos7840_port_paranoia_check(port, __func__))
1369 return -1;
1370
1371 mos7840_port = mos7840_get_port_private(port);
1372 if (mos7840_port == NULL)
1373 return -1;
1374
1375 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1376 for (i = 0; i < NUM_URBS; ++i) {
1377 if (!mos7840_port->busy[i])
1378 room += URB_TRANSFER_BUFFER_SIZE;
1379 }
1380 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1381
1382 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1383 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
1384 return room;
1385
1386 }
1387
1388 /*****************************************************************************
1389 * mos7840_write
1390 * this function is called by the tty driver when data should be written to
1391 * the port.
1392 * If successful, we return the number of bytes written, otherwise we
1393 * return a negative error number.
1394 *****************************************************************************/
1395
1396 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1397 const unsigned char *data, int count)
1398 {
1399 int status;
1400 int i;
1401 int bytes_sent = 0;
1402 int transfer_size;
1403 unsigned long flags;
1404
1405 struct moschip_port *mos7840_port;
1406 struct usb_serial *serial;
1407 struct urb *urb;
1408 /* __u16 Data; */
1409 const unsigned char *current_position = data;
1410 unsigned char *data1;
1411
1412 #ifdef NOTMOS7840
1413 Data = 0x00;
1414 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1415 mos7840_port->shadowLCR = Data;
1416 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1417 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1418
1419 /* Data = 0x03; */
1420 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1421 /* mos7840_port->shadowLCR=Data;//Need to add later */
1422
1423 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1424 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1425
1426 /* Data = 0x0c; */
1427 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1428 Data = 0x00;
1429 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1430 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
1431
1432 Data = 0x0;
1433 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1434 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
1435
1436 Data = Data & ~SERIAL_LCR_DLAB;
1437 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1438 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1439 #endif
1440
1441 if (mos7840_port_paranoia_check(port, __func__))
1442 return -1;
1443
1444 serial = port->serial;
1445 if (mos7840_serial_paranoia_check(serial, __func__))
1446 return -1;
1447
1448 mos7840_port = mos7840_get_port_private(port);
1449 if (mos7840_port == NULL)
1450 return -1;
1451
1452 /* try to find a free urb in the list */
1453 urb = NULL;
1454
1455 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1456 for (i = 0; i < NUM_URBS; ++i) {
1457 if (!mos7840_port->busy[i]) {
1458 mos7840_port->busy[i] = 1;
1459 urb = mos7840_port->write_urb_pool[i];
1460 dev_dbg(&port->dev, "URB:%d\n", i);
1461 break;
1462 }
1463 }
1464 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1465
1466 if (urb == NULL) {
1467 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
1468 goto exit;
1469 }
1470
1471 if (urb->transfer_buffer == NULL) {
1472 urb->transfer_buffer =
1473 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1474
1475 if (urb->transfer_buffer == NULL) {
1476 dev_err_console(port, "%s no more kernel memory...\n",
1477 __func__);
1478 goto exit;
1479 }
1480 }
1481 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1482
1483 memcpy(urb->transfer_buffer, current_position, transfer_size);
1484
1485 /* fill urb with data and submit */
1486 if ((serial->num_ports == 2)
1487 && ((((__u16)port->number -
1488 (__u16)(port->serial->minor)) % 2) != 0)) {
1489 usb_fill_bulk_urb(urb,
1490 serial->dev,
1491 usb_sndbulkpipe(serial->dev,
1492 (port->bulk_out_endpointAddress) + 2),
1493 urb->transfer_buffer,
1494 transfer_size,
1495 mos7840_bulk_out_data_callback, mos7840_port);
1496 } else {
1497 usb_fill_bulk_urb(urb,
1498 serial->dev,
1499 usb_sndbulkpipe(serial->dev,
1500 port->bulk_out_endpointAddress),
1501 urb->transfer_buffer,
1502 transfer_size,
1503 mos7840_bulk_out_data_callback, mos7840_port);
1504 }
1505
1506 data1 = urb->transfer_buffer;
1507 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
1508
1509 /* Turn on LED */
1510 if (mos7840_port->has_led && !mos7840_port->led_flag) {
1511 mos7840_port->led_flag = true;
1512 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);
1513 mod_timer(&mos7840_port->led_timer1,
1514 jiffies + msecs_to_jiffies(LED_ON_MS));
1515 }
1516
1517 /* send it down the pipe */
1518 status = usb_submit_urb(urb, GFP_ATOMIC);
1519
1520 if (status) {
1521 mos7840_port->busy[i] = 0;
1522 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1523 "with status = %d\n", __func__, status);
1524 bytes_sent = status;
1525 goto exit;
1526 }
1527 bytes_sent = transfer_size;
1528 mos7840_port->icount.tx += transfer_size;
1529 smp_wmb();
1530 dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
1531 exit:
1532 return bytes_sent;
1533
1534 }
1535
1536 /*****************************************************************************
1537 * mos7840_throttle
1538 * this function is called by the tty driver when it wants to stop the data
1539 * being read from the port.
1540 *****************************************************************************/
1541
1542 static void mos7840_throttle(struct tty_struct *tty)
1543 {
1544 struct usb_serial_port *port = tty->driver_data;
1545 struct moschip_port *mos7840_port;
1546 int status;
1547
1548 if (mos7840_port_paranoia_check(port, __func__))
1549 return;
1550
1551 mos7840_port = mos7840_get_port_private(port);
1552
1553 if (mos7840_port == NULL)
1554 return;
1555
1556 if (!mos7840_port->open) {
1557 dev_dbg(&port->dev, "%s", "port not opened\n");
1558 return;
1559 }
1560
1561 /* if we are implementing XON/XOFF, send the stop character */
1562 if (I_IXOFF(tty)) {
1563 unsigned char stop_char = STOP_CHAR(tty);
1564 status = mos7840_write(tty, port, &stop_char, 1);
1565 if (status <= 0)
1566 return;
1567 }
1568 /* if we are implementing RTS/CTS, toggle that line */
1569 if (tty->termios.c_cflag & CRTSCTS) {
1570 mos7840_port->shadowMCR &= ~MCR_RTS;
1571 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1572 mos7840_port->shadowMCR);
1573 if (status < 0)
1574 return;
1575 }
1576 }
1577
1578 /*****************************************************************************
1579 * mos7840_unthrottle
1580 * this function is called by the tty driver when it wants to resume
1581 * the data being read from the port (called after mos7840_throttle is
1582 * called)
1583 *****************************************************************************/
1584 static void mos7840_unthrottle(struct tty_struct *tty)
1585 {
1586 struct usb_serial_port *port = tty->driver_data;
1587 int status;
1588 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1589
1590 if (mos7840_port_paranoia_check(port, __func__))
1591 return;
1592
1593 if (mos7840_port == NULL)
1594 return;
1595
1596 if (!mos7840_port->open) {
1597 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1598 return;
1599 }
1600
1601 /* if we are implementing XON/XOFF, send the start character */
1602 if (I_IXOFF(tty)) {
1603 unsigned char start_char = START_CHAR(tty);
1604 status = mos7840_write(tty, port, &start_char, 1);
1605 if (status <= 0)
1606 return;
1607 }
1608
1609 /* if we are implementing RTS/CTS, toggle that line */
1610 if (tty->termios.c_cflag & CRTSCTS) {
1611 mos7840_port->shadowMCR |= MCR_RTS;
1612 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1613 mos7840_port->shadowMCR);
1614 if (status < 0)
1615 return;
1616 }
1617 }
1618
1619 static int mos7840_tiocmget(struct tty_struct *tty)
1620 {
1621 struct usb_serial_port *port = tty->driver_data;
1622 struct moschip_port *mos7840_port;
1623 unsigned int result;
1624 __u16 msr;
1625 __u16 mcr;
1626 int status;
1627 mos7840_port = mos7840_get_port_private(port);
1628
1629 if (mos7840_port == NULL)
1630 return -ENODEV;
1631
1632 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1633 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1634 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1635 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1636 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1637 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1638 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1639 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1640 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1641
1642 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1643
1644 return result;
1645 }
1646
1647 static int mos7840_tiocmset(struct tty_struct *tty,
1648 unsigned int set, unsigned int clear)
1649 {
1650 struct usb_serial_port *port = tty->driver_data;
1651 struct moschip_port *mos7840_port;
1652 unsigned int mcr;
1653 int status;
1654
1655 mos7840_port = mos7840_get_port_private(port);
1656
1657 if (mos7840_port == NULL)
1658 return -ENODEV;
1659
1660 /* FIXME: What locks the port registers ? */
1661 mcr = mos7840_port->shadowMCR;
1662 if (clear & TIOCM_RTS)
1663 mcr &= ~MCR_RTS;
1664 if (clear & TIOCM_DTR)
1665 mcr &= ~MCR_DTR;
1666 if (clear & TIOCM_LOOP)
1667 mcr &= ~MCR_LOOPBACK;
1668
1669 if (set & TIOCM_RTS)
1670 mcr |= MCR_RTS;
1671 if (set & TIOCM_DTR)
1672 mcr |= MCR_DTR;
1673 if (set & TIOCM_LOOP)
1674 mcr |= MCR_LOOPBACK;
1675
1676 mos7840_port->shadowMCR = mcr;
1677
1678 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1679 if (status < 0) {
1680 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1681 return status;
1682 }
1683
1684 return 0;
1685 }
1686
1687 /*****************************************************************************
1688 * mos7840_calc_baud_rate_divisor
1689 * this function calculates the proper baud rate divisor for the specified
1690 * baud rate.
1691 *****************************************************************************/
1692 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1693 int baudRate, int *divisor,
1694 __u16 *clk_sel_val)
1695 {
1696 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1697
1698 if (baudRate <= 115200) {
1699 *divisor = 115200 / baudRate;
1700 *clk_sel_val = 0x0;
1701 }
1702 if ((baudRate > 115200) && (baudRate <= 230400)) {
1703 *divisor = 230400 / baudRate;
1704 *clk_sel_val = 0x10;
1705 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1706 *divisor = 403200 / baudRate;
1707 *clk_sel_val = 0x20;
1708 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1709 *divisor = 460800 / baudRate;
1710 *clk_sel_val = 0x30;
1711 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1712 *divisor = 806400 / baudRate;
1713 *clk_sel_val = 0x40;
1714 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1715 *divisor = 921600 / baudRate;
1716 *clk_sel_val = 0x50;
1717 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1718 *divisor = 1572864 / baudRate;
1719 *clk_sel_val = 0x60;
1720 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1721 *divisor = 3145728 / baudRate;
1722 *clk_sel_val = 0x70;
1723 }
1724 return 0;
1725
1726 #ifdef NOTMCS7840
1727
1728 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1729 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1730 *divisor = mos7840_divisor_table[i].Divisor;
1731 return 0;
1732 }
1733 }
1734
1735 /* After trying for all the standard baud rates *
1736 * Try calculating the divisor for this baud rate */
1737
1738 if (baudrate > 75 && baudrate < 230400) {
1739 /* get the divisor */
1740 custom = (__u16) (230400L / baudrate);
1741
1742 /* Check for round off */
1743 round1 = (__u16) (2304000L / baudrate);
1744 round = (__u16) (round1 - (custom * 10));
1745 if (round > 4)
1746 custom++;
1747 *divisor = custom;
1748
1749 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
1750 return 0;
1751 }
1752
1753 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
1754 return -1;
1755 #endif
1756 }
1757
1758 /*****************************************************************************
1759 * mos7840_send_cmd_write_baud_rate
1760 * this function sends the proper command to change the baud rate of the
1761 * specified port.
1762 *****************************************************************************/
1763
1764 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1765 int baudRate)
1766 {
1767 int divisor = 0;
1768 int status;
1769 __u16 Data;
1770 unsigned char number;
1771 __u16 clk_sel_val;
1772 struct usb_serial_port *port;
1773
1774 if (mos7840_port == NULL)
1775 return -1;
1776
1777 port = mos7840_port->port;
1778 if (mos7840_port_paranoia_check(port, __func__))
1779 return -1;
1780
1781 if (mos7840_serial_paranoia_check(port->serial, __func__))
1782 return -1;
1783
1784 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1785
1786 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__,
1787 mos7840_port->port->number, baudRate);
1788 /* reset clk_uart_sel in spregOffset */
1789 if (baudRate > 115200) {
1790 #ifdef HW_flow_control
1791 /* NOTE: need to see the pther register to modify */
1792 /* setting h/w flow control bit to 1 */
1793 Data = 0x2b;
1794 mos7840_port->shadowMCR = Data;
1795 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1796 Data);
1797 if (status < 0) {
1798 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1799 return -1;
1800 }
1801 #endif
1802
1803 } else {
1804 #ifdef HW_flow_control
1805 /* setting h/w flow control bit to 0 */
1806 Data = 0xb;
1807 mos7840_port->shadowMCR = Data;
1808 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1809 Data);
1810 if (status < 0) {
1811 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1812 return -1;
1813 }
1814 #endif
1815
1816 }
1817
1818 if (1) { /* baudRate <= 115200) */
1819 clk_sel_val = 0x0;
1820 Data = 0x0;
1821 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1822 &clk_sel_val);
1823 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1824 &Data);
1825 if (status < 0) {
1826 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1827 return -1;
1828 }
1829 Data = (Data & 0x8f) | clk_sel_val;
1830 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1831 Data);
1832 if (status < 0) {
1833 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1834 return -1;
1835 }
1836 /* Calculate the Divisor */
1837
1838 if (status) {
1839 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1840 return status;
1841 }
1842 /* Enable access to divisor latch */
1843 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1844 mos7840_port->shadowLCR = Data;
1845 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1846
1847 /* Write the divisor */
1848 Data = (unsigned char)(divisor & 0xff);
1849 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1850 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1851
1852 Data = (unsigned char)((divisor & 0xff00) >> 8);
1853 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1854 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1855
1856 /* Disable access to divisor latch */
1857 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1858 mos7840_port->shadowLCR = Data;
1859 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1860
1861 }
1862 return status;
1863 }
1864
1865 /*****************************************************************************
1866 * mos7840_change_port_settings
1867 * This routine is called to set the UART on the device to match
1868 * the specified new settings.
1869 *****************************************************************************/
1870
1871 static void mos7840_change_port_settings(struct tty_struct *tty,
1872 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1873 {
1874 int baud;
1875 unsigned cflag;
1876 unsigned iflag;
1877 __u8 lData;
1878 __u8 lParity;
1879 __u8 lStop;
1880 int status;
1881 __u16 Data;
1882 struct usb_serial_port *port;
1883 struct usb_serial *serial;
1884
1885 if (mos7840_port == NULL)
1886 return;
1887
1888 port = mos7840_port->port;
1889
1890 if (mos7840_port_paranoia_check(port, __func__))
1891 return;
1892
1893 if (mos7840_serial_paranoia_check(port->serial, __func__))
1894 return;
1895
1896 serial = port->serial;
1897
1898 if (!mos7840_port->open) {
1899 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1900 return;
1901 }
1902
1903 lData = LCR_BITS_8;
1904 lStop = LCR_STOP_1;
1905 lParity = LCR_PAR_NONE;
1906
1907 cflag = tty->termios.c_cflag;
1908 iflag = tty->termios.c_iflag;
1909
1910 /* Change the number of bits */
1911 if (cflag & CSIZE) {
1912 switch (cflag & CSIZE) {
1913 case CS5:
1914 lData = LCR_BITS_5;
1915 break;
1916
1917 case CS6:
1918 lData = LCR_BITS_6;
1919 break;
1920
1921 case CS7:
1922 lData = LCR_BITS_7;
1923 break;
1924 default:
1925 case CS8:
1926 lData = LCR_BITS_8;
1927 break;
1928 }
1929 }
1930 /* Change the Parity bit */
1931 if (cflag & PARENB) {
1932 if (cflag & PARODD) {
1933 lParity = LCR_PAR_ODD;
1934 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1935 } else {
1936 lParity = LCR_PAR_EVEN;
1937 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1938 }
1939
1940 } else {
1941 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1942 }
1943
1944 if (cflag & CMSPAR)
1945 lParity = lParity | 0x20;
1946
1947 /* Change the Stop bit */
1948 if (cflag & CSTOPB) {
1949 lStop = LCR_STOP_2;
1950 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1951 } else {
1952 lStop = LCR_STOP_1;
1953 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1954 }
1955
1956 /* Update the LCR with the correct value */
1957 mos7840_port->shadowLCR &=
1958 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1959 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1960
1961 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1962 mos7840_port->shadowLCR);
1963 /* Disable Interrupts */
1964 Data = 0x00;
1965 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1966
1967 Data = 0x00;
1968 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1969
1970 Data = 0xcf;
1971 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1972
1973 /* Send the updated LCR value to the mos7840 */
1974 Data = mos7840_port->shadowLCR;
1975
1976 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1977
1978 Data = 0x00b;
1979 mos7840_port->shadowMCR = Data;
1980 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1981 Data = 0x00b;
1982 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1983
1984 /* set up the MCR register and send it to the mos7840 */
1985
1986 mos7840_port->shadowMCR = MCR_MASTER_IE;
1987 if (cflag & CBAUD)
1988 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1989
1990 if (cflag & CRTSCTS)
1991 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1992 else
1993 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1994
1995 Data = mos7840_port->shadowMCR;
1996 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1997
1998 /* Determine divisor based on baud rate */
1999 baud = tty_get_baud_rate(tty);
2000
2001 if (!baud) {
2002 /* pick a default, any default... */
2003 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
2004 baud = 9600;
2005 }
2006
2007 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
2008 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2009
2010 /* Enable Interrupts */
2011 Data = 0x0c;
2012 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2013
2014 if (mos7840_port->read_urb_busy == false) {
2015 mos7840_port->read_urb_busy = true;
2016 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2017 if (status) {
2018 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
2019 status);
2020 mos7840_port->read_urb_busy = false;
2021 }
2022 }
2023 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
2024 mos7840_port->shadowLCR);
2025 }
2026
2027 /*****************************************************************************
2028 * mos7840_set_termios
2029 * this function is called by the tty driver when it wants to change
2030 * the termios structure
2031 *****************************************************************************/
2032
2033 static void mos7840_set_termios(struct tty_struct *tty,
2034 struct usb_serial_port *port,
2035 struct ktermios *old_termios)
2036 {
2037 int status;
2038 unsigned int cflag;
2039 struct usb_serial *serial;
2040 struct moschip_port *mos7840_port;
2041
2042 if (mos7840_port_paranoia_check(port, __func__))
2043 return;
2044
2045 serial = port->serial;
2046
2047 if (mos7840_serial_paranoia_check(serial, __func__))
2048 return;
2049
2050 mos7840_port = mos7840_get_port_private(port);
2051
2052 if (mos7840_port == NULL)
2053 return;
2054
2055 if (!mos7840_port->open) {
2056 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
2057 return;
2058 }
2059
2060 dev_dbg(&port->dev, "%s", "setting termios - \n");
2061
2062 cflag = tty->termios.c_cflag;
2063
2064 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2065 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
2066 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2067 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2068 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
2069
2070 /* change the port settings to the new ones specified */
2071
2072 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2073
2074 if (!mos7840_port->read_urb) {
2075 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
2076 return;
2077 }
2078
2079 if (mos7840_port->read_urb_busy == false) {
2080 mos7840_port->read_urb_busy = true;
2081 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2082 if (status) {
2083 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
2084 status);
2085 mos7840_port->read_urb_busy = false;
2086 }
2087 }
2088 }
2089
2090 /*****************************************************************************
2091 * mos7840_get_lsr_info - get line status register info
2092 *
2093 * Purpose: Let user call ioctl() to get info when the UART physically
2094 * is emptied. On bus types like RS485, the transmitter must
2095 * release the bus after transmitting. This must be done when
2096 * the transmit shift register is empty, not be done when the
2097 * transmit holding register is empty. This functionality
2098 * allows an RS485 driver to be written in user space.
2099 *****************************************************************************/
2100
2101 static int mos7840_get_lsr_info(struct tty_struct *tty,
2102 unsigned int __user *value)
2103 {
2104 int count;
2105 unsigned int result = 0;
2106
2107 count = mos7840_chars_in_buffer(tty);
2108 if (count == 0)
2109 result = TIOCSER_TEMT;
2110
2111 if (copy_to_user(value, &result, sizeof(int)))
2112 return -EFAULT;
2113 return 0;
2114 }
2115
2116 /*****************************************************************************
2117 * mos7840_get_serial_info
2118 * function to get information about serial port
2119 *****************************************************************************/
2120
2121 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2122 struct serial_struct __user *retinfo)
2123 {
2124 struct serial_struct tmp;
2125
2126 if (mos7840_port == NULL)
2127 return -1;
2128
2129 if (!retinfo)
2130 return -EFAULT;
2131
2132 memset(&tmp, 0, sizeof(tmp));
2133
2134 tmp.type = PORT_16550A;
2135 tmp.line = mos7840_port->port->serial->minor;
2136 tmp.port = mos7840_port->port->number;
2137 tmp.irq = 0;
2138 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2139 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2140 tmp.baud_base = 9600;
2141 tmp.close_delay = 5 * HZ;
2142 tmp.closing_wait = 30 * HZ;
2143
2144 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2145 return -EFAULT;
2146 return 0;
2147 }
2148
2149 static int mos7840_get_icount(struct tty_struct *tty,
2150 struct serial_icounter_struct *icount)
2151 {
2152 struct usb_serial_port *port = tty->driver_data;
2153 struct moschip_port *mos7840_port;
2154 struct async_icount cnow;
2155
2156 mos7840_port = mos7840_get_port_private(port);
2157 cnow = mos7840_port->icount;
2158
2159 smp_rmb();
2160 icount->cts = cnow.cts;
2161 icount->dsr = cnow.dsr;
2162 icount->rng = cnow.rng;
2163 icount->dcd = cnow.dcd;
2164 icount->rx = cnow.rx;
2165 icount->tx = cnow.tx;
2166 icount->frame = cnow.frame;
2167 icount->overrun = cnow.overrun;
2168 icount->parity = cnow.parity;
2169 icount->brk = cnow.brk;
2170 icount->buf_overrun = cnow.buf_overrun;
2171
2172 dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__,
2173 icount->rx, icount->tx);
2174 return 0;
2175 }
2176
2177 /*****************************************************************************
2178 * SerialIoctl
2179 * this function handles any ioctl calls to the driver
2180 *****************************************************************************/
2181
2182 static int mos7840_ioctl(struct tty_struct *tty,
2183 unsigned int cmd, unsigned long arg)
2184 {
2185 struct usb_serial_port *port = tty->driver_data;
2186 void __user *argp = (void __user *)arg;
2187 struct moschip_port *mos7840_port;
2188
2189 struct async_icount cnow;
2190 struct async_icount cprev;
2191
2192 if (mos7840_port_paranoia_check(port, __func__))
2193 return -1;
2194
2195 mos7840_port = mos7840_get_port_private(port);
2196
2197 if (mos7840_port == NULL)
2198 return -1;
2199
2200 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
2201
2202 switch (cmd) {
2203 /* return number of bytes available */
2204
2205 case TIOCSERGETLSR:
2206 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
2207 return mos7840_get_lsr_info(tty, argp);
2208
2209 case TIOCGSERIAL:
2210 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
2211 return mos7840_get_serial_info(mos7840_port, argp);
2212
2213 case TIOCSSERIAL:
2214 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
2215 break;
2216
2217 case TIOCMIWAIT:
2218 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__);
2219 cprev = mos7840_port->icount;
2220 while (1) {
2221 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2222 mos7840_port->delta_msr_cond = 0;
2223 wait_event_interruptible(mos7840_port->delta_msr_wait,
2224 (mos7840_port->
2225 delta_msr_cond == 1));
2226
2227 /* see if a signal did it */
2228 if (signal_pending(current))
2229 return -ERESTARTSYS;
2230 cnow = mos7840_port->icount;
2231 smp_rmb();
2232 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2233 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2234 return -EIO; /* no change => error */
2235 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2236 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2237 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2238 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2239 return 0;
2240 }
2241 cprev = cnow;
2242 }
2243 /* NOTREACHED */
2244 break;
2245
2246 default:
2247 break;
2248 }
2249 return -ENOIOCTLCMD;
2250 }
2251
2252 static int mos7810_check(struct usb_serial *serial)
2253 {
2254 int i, pass_count = 0;
2255 __u16 data = 0, mcr_data = 0;
2256 __u16 test_pattern = 0x55AA;
2257
2258 /* Store MCR setting */
2259 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2260 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2261 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2262
2263 for (i = 0; i < 16; i++) {
2264 /* Send the 1-bit test pattern out to MCS7810 test pin */
2265 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2266 MCS_WRREQ, MCS_WR_RTYPE,
2267 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2268 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2269
2270 /* Read the test pattern back */
2271 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2272 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2273 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2274
2275 /* If this is a MCS7810 device, both test patterns must match */
2276 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2277 break;
2278
2279 pass_count++;
2280 }
2281
2282 /* Restore MCR setting */
2283 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2284 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2285 0, MOS_WDR_TIMEOUT);
2286
2287 if (pass_count == 16)
2288 return 1;
2289
2290 return 0;
2291 }
2292
2293 static int mos7840_calc_num_ports(struct usb_serial *serial)
2294 {
2295 __u16 data = 0x00;
2296 int mos7840_num_ports;
2297
2298 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2299 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2300 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2301
2302 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||
2303 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {
2304 device_type = serial->dev->descriptor.idProduct;
2305 } else {
2306 /* For a MCS7840 device GPIO0 must be set to 1 */
2307 if ((data & 0x01) == 1)
2308 device_type = MOSCHIP_DEVICE_ID_7840;
2309 else if (mos7810_check(serial))
2310 device_type = MOSCHIP_DEVICE_ID_7810;
2311 else
2312 device_type = MOSCHIP_DEVICE_ID_7820;
2313 }
2314
2315 mos7840_num_ports = (device_type >> 4) & 0x000F;
2316 serial->num_bulk_in = mos7840_num_ports;
2317 serial->num_bulk_out = mos7840_num_ports;
2318 serial->num_ports = mos7840_num_ports;
2319
2320 return mos7840_num_ports;
2321 }
2322
2323 static int mos7840_port_probe(struct usb_serial_port *port)
2324 {
2325 struct usb_serial *serial = port->serial;
2326 struct moschip_port *mos7840_port;
2327 int status;
2328 int pnum;
2329 __u16 Data;
2330
2331 /* we set up the pointers to the endpoints in the mos7840_open *
2332 * function, as the structures aren't created yet. */
2333
2334 pnum = port->number - serial->minor;
2335
2336 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2337 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2338 if (mos7840_port == NULL) {
2339 dev_err(&port->dev, "%s - Out of memory\n", __func__);
2340 return -ENOMEM;
2341 }
2342
2343 /* Initialize all port interrupt end point to port 0 int
2344 * endpoint. Our device has only one interrupt end point
2345 * common to all port */
2346
2347 mos7840_port->port = port;
2348 mos7840_set_port_private(port, mos7840_port);
2349 spin_lock_init(&mos7840_port->pool_lock);
2350
2351 /* minor is not initialised until later by
2352 * usb-serial.c:get_free_serial() and cannot therefore be used
2353 * to index device instances */
2354 mos7840_port->port_num = pnum + 1;
2355 dev_dbg(&port->dev, "port->number = %d\n", port->number);
2356 dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor);
2357 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2358 dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor);
2359
2360 if (mos7840_port->port_num == 1) {
2361 mos7840_port->SpRegOffset = 0x0;
2362 mos7840_port->ControlRegOffset = 0x1;
2363 mos7840_port->DcrRegOffset = 0x4;
2364 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2365 mos7840_port->SpRegOffset = 0x8;
2366 mos7840_port->ControlRegOffset = 0x9;
2367 mos7840_port->DcrRegOffset = 0x16;
2368 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2369 mos7840_port->SpRegOffset = 0xa;
2370 mos7840_port->ControlRegOffset = 0xb;
2371 mos7840_port->DcrRegOffset = 0x19;
2372 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2373 mos7840_port->SpRegOffset = 0xa;
2374 mos7840_port->ControlRegOffset = 0xb;
2375 mos7840_port->DcrRegOffset = 0x19;
2376 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2377 mos7840_port->SpRegOffset = 0xc;
2378 mos7840_port->ControlRegOffset = 0xd;
2379 mos7840_port->DcrRegOffset = 0x1c;
2380 }
2381 mos7840_dump_serial_port(port, mos7840_port);
2382 mos7840_set_port_private(port, mos7840_port);
2383
2384 /* enable rx_disable bit in control register */
2385 status = mos7840_get_reg_sync(port,
2386 mos7840_port->ControlRegOffset, &Data);
2387 if (status < 0) {
2388 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2389 goto out;
2390 } else
2391 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2392 Data |= 0x08; /* setting driver done bit */
2393 Data |= 0x04; /* sp1_bit to have cts change reflect in
2394 modem status reg */
2395
2396 /* Data |= 0x20; //rx_disable bit */
2397 status = mos7840_set_reg_sync(port,
2398 mos7840_port->ControlRegOffset, Data);
2399 if (status < 0) {
2400 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2401 goto out;
2402 } else
2403 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2404
2405 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2406 and 0x24 in DCR3 */
2407 Data = 0x01;
2408 status = mos7840_set_reg_sync(port,
2409 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2410 if (status < 0) {
2411 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2412 goto out;
2413 } else
2414 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
2415
2416 Data = 0x05;
2417 status = mos7840_set_reg_sync(port,
2418 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2419 if (status < 0) {
2420 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2421 goto out;
2422 } else
2423 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
2424
2425 Data = 0x24;
2426 status = mos7840_set_reg_sync(port,
2427 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2428 if (status < 0) {
2429 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2430 goto out;
2431 } else
2432 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
2433
2434 /* write values in clkstart0x0 and clkmulti 0x20 */
2435 Data = 0x0;
2436 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2437 if (status < 0) {
2438 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2439 goto out;
2440 } else
2441 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2442
2443 Data = 0x20;
2444 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2445 if (status < 0) {
2446 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2447 goto error;
2448 } else
2449 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
2450
2451 /* write value 0x0 to scratchpad register */
2452 Data = 0x00;
2453 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2454 if (status < 0) {
2455 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2456 goto out;
2457 } else
2458 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2459
2460 /* Zero Length flag register */
2461 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2462 Data = 0xff;
2463 status = mos7840_set_reg_sync(port,
2464 (__u16) (ZLP_REG1 +
2465 ((__u16)mos7840_port->port_num)), Data);
2466 dev_dbg(&port->dev, "ZLIP offset %x\n",
2467 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
2468 if (status < 0) {
2469 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2470 goto out;
2471 } else
2472 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2473 } else {
2474 Data = 0xff;
2475 status = mos7840_set_reg_sync(port,
2476 (__u16) (ZLP_REG1 +
2477 ((__u16)mos7840_port->port_num) - 0x1), Data);
2478 dev_dbg(&port->dev, "ZLIP offset %x\n",
2479 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
2480 if (status < 0) {
2481 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2482 goto out;
2483 } else
2484 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
2485
2486 }
2487 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2488 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2489 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2490 GFP_KERNEL);
2491 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2492 !mos7840_port->dr) {
2493 status = -ENOMEM;
2494 goto error;
2495 }
2496
2497 mos7840_port->has_led = false;
2498
2499 /* Initialize LED timers */
2500 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2501 mos7840_port->has_led = true;
2502
2503 init_timer(&mos7840_port->led_timer1);
2504 mos7840_port->led_timer1.function = mos7840_led_off;
2505 mos7840_port->led_timer1.expires =
2506 jiffies + msecs_to_jiffies(LED_ON_MS);
2507 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
2508
2509 init_timer(&mos7840_port->led_timer2);
2510 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2511 mos7840_port->led_timer2.expires =
2512 jiffies + msecs_to_jiffies(LED_OFF_MS);
2513 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
2514
2515 mos7840_port->led_flag = false;
2516
2517 /* Turn off LED */
2518 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2519 }
2520 out:
2521 if (pnum == serial->num_ports - 1) {
2522 /* Zero Length flag enable */
2523 Data = 0x0f;
2524 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2525 if (status < 0) {
2526 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2527 goto error;
2528 } else
2529 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2530
2531 /* setting configuration feature to one */
2532 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2533 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2534 MOS_WDR_TIMEOUT);
2535 }
2536 return 0;
2537 error:
2538 kfree(mos7840_port->dr);
2539 kfree(mos7840_port->ctrl_buf);
2540 usb_free_urb(mos7840_port->control_urb);
2541 kfree(mos7840_port);
2542
2543 return status;
2544 }
2545
2546 static int mos7840_port_remove(struct usb_serial_port *port)
2547 {
2548 struct moschip_port *mos7840_port;
2549
2550 mos7840_port = mos7840_get_port_private(port);
2551
2552 if (mos7840_port->has_led) {
2553 /* Turn off LED */
2554 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2555
2556 del_timer_sync(&mos7840_port->led_timer1);
2557 del_timer_sync(&mos7840_port->led_timer2);
2558 }
2559 usb_kill_urb(mos7840_port->control_urb);
2560 usb_free_urb(mos7840_port->control_urb);
2561 kfree(mos7840_port->ctrl_buf);
2562 kfree(mos7840_port->dr);
2563 kfree(mos7840_port);
2564
2565 return 0;
2566 }
2567
2568 static struct usb_serial_driver moschip7840_4port_device = {
2569 .driver = {
2570 .owner = THIS_MODULE,
2571 .name = "mos7840",
2572 },
2573 .description = DRIVER_DESC,
2574 .id_table = id_table,
2575 .num_ports = 4,
2576 .open = mos7840_open,
2577 .close = mos7840_close,
2578 .write = mos7840_write,
2579 .write_room = mos7840_write_room,
2580 .chars_in_buffer = mos7840_chars_in_buffer,
2581 .throttle = mos7840_throttle,
2582 .unthrottle = mos7840_unthrottle,
2583 .calc_num_ports = mos7840_calc_num_ports,
2584 #ifdef MCSSerialProbe
2585 .probe = mos7840_serial_probe,
2586 #endif
2587 .ioctl = mos7840_ioctl,
2588 .set_termios = mos7840_set_termios,
2589 .break_ctl = mos7840_break,
2590 .tiocmget = mos7840_tiocmget,
2591 .tiocmset = mos7840_tiocmset,
2592 .get_icount = mos7840_get_icount,
2593 .port_probe = mos7840_port_probe,
2594 .port_remove = mos7840_port_remove,
2595 .read_bulk_callback = mos7840_bulk_in_callback,
2596 .read_int_callback = mos7840_interrupt_callback,
2597 };
2598
2599 static struct usb_serial_driver * const serial_drivers[] = {
2600 &moschip7840_4port_device, NULL
2601 };
2602
2603 module_usb_serial_driver(serial_drivers, id_table);
2604
2605 MODULE_DESCRIPTION(DRIVER_DESC);
2606 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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