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