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Linux 3.11-rc3
[cris-mirror.git] / drivers / usb / serial / mos7840.c
blob603fb70dde8005ddfcf9743e2f3f8d0acd616bb5
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->port_number + 1) << 8;
307 } else {
308 if (port->port_number == 0) {
309 val |= ((__u16)port->port_number + 1) << 8;
310 } else {
311 val |= ((__u16)port->port_number + 2) << 8;
312 }
313 }
314 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
315 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
316 MCS_WR_RTYPE, val, reg, NULL, 0,
317 MOS_WDR_TIMEOUT);
318
319 }
320
321 /*
322 * mos7840_get_uart_reg
323 * To set the Control register by calling usb_fill_control_urb function
324 * by passing usb_rcvctrlpipe function as parameter.
325 */
326 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
327 __u16 *val)
328 {
329 struct usb_device *dev = port->serial->dev;
330 int ret = 0;
331 __u16 Wval;
332 u8 *buf;
333
334 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
335 if (!buf)
336 return -ENOMEM;
337
338 /* Wval is same as application number */
339 if (port->serial->num_ports == 4) {
340 Wval = ((__u16)port->port_number + 1) << 8;
341 } else {
342 if (port->port_number == 0) {
343 Wval = ((__u16)port->port_number + 1) << 8;
344 } else {
345 Wval = ((__u16)port->port_number + 2) << 8;
346 }
347 }
348 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
349 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
350 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
351 MOS_WDR_TIMEOUT);
352 *val = buf[0];
353
354 kfree(buf);
355 return ret;
356 }
357
358 static void mos7840_dump_serial_port(struct usb_serial_port *port,
359 struct moschip_port *mos7840_port)
360 {
361
362 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
363 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
364 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
365
366 }
367
368 /************************************************************************/
369 /************************************************************************/
370 /* I N T E R F A C E F U N C T I O N S */
371 /* I N T E R F A C E F U N C T I O N S */
372 /************************************************************************/
373 /************************************************************************/
374
375 static inline void mos7840_set_port_private(struct usb_serial_port *port,
376 struct moschip_port *data)
377 {
378 usb_set_serial_port_data(port, (void *)data);
379 }
380
381 static inline struct moschip_port *mos7840_get_port_private(struct
382 usb_serial_port
383 *port)
384 {
385 return (struct moschip_port *)usb_get_serial_port_data(port);
386 }
387
388 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
389 {
390 struct moschip_port *mos7840_port;
391 struct async_icount *icount;
392 mos7840_port = port;
393 if (new_msr &
394 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
395 MOS_MSR_DELTA_CD)) {
396 icount = &mos7840_port->port->icount;
397
398 /* update input line counters */
399 if (new_msr & MOS_MSR_DELTA_CTS)
400 icount->cts++;
401 if (new_msr & MOS_MSR_DELTA_DSR)
402 icount->dsr++;
403 if (new_msr & MOS_MSR_DELTA_CD)
404 icount->dcd++;
405 if (new_msr & MOS_MSR_DELTA_RI)
406 icount->rng++;
407
408 wake_up_interruptible(&port->port->port.delta_msr_wait);
409 }
410 }
411
412 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
413 {
414 struct async_icount *icount;
415
416 if (new_lsr & SERIAL_LSR_BI) {
417 /*
418 * Parity and Framing errors only count if they
419 * occur exclusive of a break being
420 * received.
421 */
422 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
423 }
424
425 /* update input line counters */
426 icount = &port->port->icount;
427 if (new_lsr & SERIAL_LSR_BI)
428 icount->brk++;
429 if (new_lsr & SERIAL_LSR_OE)
430 icount->overrun++;
431 if (new_lsr & SERIAL_LSR_PE)
432 icount->parity++;
433 if (new_lsr & SERIAL_LSR_FE)
434 icount->frame++;
435 }
436
437 /************************************************************************/
438 /************************************************************************/
439 /* U S B C A L L B A C K F U N C T I O N S */
440 /* U S B C A L L B A C K F U N C T I O N S */
441 /************************************************************************/
442 /************************************************************************/
443
444 static void mos7840_control_callback(struct urb *urb)
445 {
446 unsigned char *data;
447 struct moschip_port *mos7840_port;
448 struct device *dev = &urb->dev->dev;
449 __u8 regval = 0x0;
450 int status = urb->status;
451
452 mos7840_port = urb->context;
453
454 switch (status) {
455 case 0:
456 /* success */
457 break;
458 case -ECONNRESET:
459 case -ENOENT:
460 case -ESHUTDOWN:
461 /* this urb is terminated, clean up */
462 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
463 return;
464 default:
465 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
466 return;
467 }
468
469 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
470 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
471 mos7840_port->MsrLsr, mos7840_port->port_num);
472 data = urb->transfer_buffer;
473 regval = (__u8) data[0];
474 dev_dbg(dev, "%s data is %x\n", __func__, regval);
475 if (mos7840_port->MsrLsr == 0)
476 mos7840_handle_new_msr(mos7840_port, regval);
477 else if (mos7840_port->MsrLsr == 1)
478 mos7840_handle_new_lsr(mos7840_port, regval);
479 }
480
481 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
482 __u16 *val)
483 {
484 struct usb_device *dev = mcs->port->serial->dev;
485 struct usb_ctrlrequest *dr = mcs->dr;
486 unsigned char *buffer = mcs->ctrl_buf;
487 int ret;
488
489 dr->bRequestType = MCS_RD_RTYPE;
490 dr->bRequest = MCS_RDREQ;
491 dr->wValue = cpu_to_le16(Wval); /* 0 */
492 dr->wIndex = cpu_to_le16(reg);
493 dr->wLength = cpu_to_le16(2);
494
495 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
496 (unsigned char *)dr, buffer, 2,
497 mos7840_control_callback, mcs);
498 mcs->control_urb->transfer_buffer_length = 2;
499 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
500 return ret;
501 }
502
503 static void mos7840_set_led_callback(struct urb *urb)
504 {
505 switch (urb->status) {
506 case 0:
507 /* Success */
508 break;
509 case -ECONNRESET:
510 case -ENOENT:
511 case -ESHUTDOWN:
512 /* This urb is terminated, clean up */
513 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
514 __func__, urb->status);
515 break;
516 default:
517 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
518 __func__, urb->status);
519 }
520 }
521
522 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
523 __u16 reg)
524 {
525 struct usb_device *dev = mcs->port->serial->dev;
526 struct usb_ctrlrequest *dr = mcs->dr;
527
528 dr->bRequestType = MCS_WR_RTYPE;
529 dr->bRequest = MCS_WRREQ;
530 dr->wValue = cpu_to_le16(wval);
531 dr->wIndex = cpu_to_le16(reg);
532 dr->wLength = cpu_to_le16(0);
533
534 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),
535 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
536
537 usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
538 }
539
540 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
541 __u16 val)
542 {
543 struct usb_device *dev = port->serial->dev;
544
545 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
546 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
547 }
548
549 static void mos7840_led_off(unsigned long arg)
550 {
551 struct moschip_port *mcs = (struct moschip_port *) arg;
552
553 /* Turn off LED */
554 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
555 mod_timer(&mcs->led_timer2,
556 jiffies + msecs_to_jiffies(LED_OFF_MS));
557 }
558
559 static void mos7840_led_flag_off(unsigned long arg)
560 {
561 struct moschip_port *mcs = (struct moschip_port *) arg;
562
563 mcs->led_flag = false;
564 }
565
566 /*****************************************************************************
567 * mos7840_interrupt_callback
568 * this is the callback function for when we have received data on the
569 * interrupt endpoint.
570 *****************************************************************************/
571
572 static void mos7840_interrupt_callback(struct urb *urb)
573 {
574 int result;
575 int length;
576 struct moschip_port *mos7840_port;
577 struct usb_serial *serial;
578 __u16 Data;
579 unsigned char *data;
580 __u8 sp[5], st;
581 int i, rv = 0;
582 __u16 wval, wreg = 0;
583 int status = urb->status;
584
585 switch (status) {
586 case 0:
587 /* success */
588 break;
589 case -ECONNRESET:
590 case -ENOENT:
591 case -ESHUTDOWN:
592 /* this urb is terminated, clean up */
593 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
594 __func__, status);
595 return;
596 default:
597 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
598 __func__, status);
599 goto exit;
600 }
601
602 length = urb->actual_length;
603 data = urb->transfer_buffer;
604
605 serial = urb->context;
606
607 /* Moschip get 5 bytes
608 * Byte 1 IIR Port 1 (port.number is 0)
609 * Byte 2 IIR Port 2 (port.number is 1)
610 * Byte 3 IIR Port 3 (port.number is 2)
611 * Byte 4 IIR Port 4 (port.number is 3)
612 * Byte 5 FIFO status for both */
613
614 if (length && length > 5) {
615 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
616 return;
617 }
618
619 sp[0] = (__u8) data[0];
620 sp[1] = (__u8) data[1];
621 sp[2] = (__u8) data[2];
622 sp[3] = (__u8) data[3];
623 st = (__u8) data[4];
624
625 for (i = 0; i < serial->num_ports; i++) {
626 mos7840_port = mos7840_get_port_private(serial->port[i]);
627 wval = ((__u16)serial->port[i]->port_number + 1) << 8;
628 if (mos7840_port->open) {
629 if (sp[i] & 0x01) {
630 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
631 } else {
632 switch (sp[i] & 0x0f) {
633 case SERIAL_IIR_RLS:
634 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
635 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
636 mos7840_port->MsrLsr = 1;
637 wreg = LINE_STATUS_REGISTER;
638 break;
639 case SERIAL_IIR_MS:
640 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
641 mos7840_port->MsrLsr = 0;
642 wreg = MODEM_STATUS_REGISTER;
643 break;
644 }
645 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
646 }
647 }
648 }
649 if (!(rv < 0))
650 /* the completion handler for the control urb will resubmit */
651 return;
652 exit:
653 result = usb_submit_urb(urb, GFP_ATOMIC);
654 if (result) {
655 dev_err(&urb->dev->dev,
656 "%s - Error %d submitting interrupt urb\n",
657 __func__, result);
658 }
659 }
660
661 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
662 const char *function)
663 {
664 if (!port) {
665 pr_debug("%s - port == NULL\n", function);
666 return -1;
667 }
668 if (!port->serial) {
669 pr_debug("%s - port->serial == NULL\n", function);
670 return -1;
671 }
672
673 return 0;
674 }
675
676 /* Inline functions to check the sanity of a pointer that is passed to us */
677 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
678 const char *function)
679 {
680 if (!serial) {
681 pr_debug("%s - serial == NULL\n", function);
682 return -1;
683 }
684 if (!serial->type) {
685 pr_debug("%s - serial->type == NULL!\n", function);
686 return -1;
687 }
688
689 return 0;
690 }
691
692 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
693 const char *function)
694 {
695 /* if no port was specified, or it fails a paranoia check */
696 if (!port ||
697 mos7840_port_paranoia_check(port, function) ||
698 mos7840_serial_paranoia_check(port->serial, function)) {
699 /* then say that we don't have a valid usb_serial thing,
700 * which will end up genrating -ENODEV return values */
701 return NULL;
702 }
703
704 return port->serial;
705 }
706
707 /*****************************************************************************
708 * mos7840_bulk_in_callback
709 * this is the callback function for when we have received data on the
710 * bulk in endpoint.
711 *****************************************************************************/
712
713 static void mos7840_bulk_in_callback(struct urb *urb)
714 {
715 int retval;
716 unsigned char *data;
717 struct usb_serial *serial;
718 struct usb_serial_port *port;
719 struct moschip_port *mos7840_port;
720 int status = urb->status;
721
722 mos7840_port = urb->context;
723 if (!mos7840_port)
724 return;
725
726 if (status) {
727 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
728 mos7840_port->read_urb_busy = false;
729 return;
730 }
731
732 port = mos7840_port->port;
733 if (mos7840_port_paranoia_check(port, __func__)) {
734 mos7840_port->read_urb_busy = false;
735 return;
736 }
737
738 serial = mos7840_get_usb_serial(port, __func__);
739 if (!serial) {
740 mos7840_port->read_urb_busy = false;
741 return;
742 }
743
744 data = urb->transfer_buffer;
745 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
746
747 if (urb->actual_length) {
748 struct tty_port *tport = &mos7840_port->port->port;
749 tty_insert_flip_string(tport, data, urb->actual_length);
750 tty_flip_buffer_push(tport);
751 port->icount.rx += urb->actual_length;
752 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx);
753 }
754
755 if (!mos7840_port->read_urb) {
756 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
757 mos7840_port->read_urb_busy = false;
758 return;
759 }
760
761 /* Turn on LED */
762 if (mos7840_port->has_led && !mos7840_port->led_flag) {
763 mos7840_port->led_flag = true;
764 mos7840_set_led_async(mos7840_port, 0x0301,
765 MODEM_CONTROL_REGISTER);
766 mod_timer(&mos7840_port->led_timer1,
767 jiffies + msecs_to_jiffies(LED_ON_MS));
768 }
769
770 mos7840_port->read_urb_busy = true;
771 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
772
773 if (retval) {
774 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
775 mos7840_port->read_urb_busy = false;
776 }
777 }
778
779 /*****************************************************************************
780 * mos7840_bulk_out_data_callback
781 * this is the callback function for when we have finished sending
782 * serial data on the bulk out endpoint.
783 *****************************************************************************/
784
785 static void mos7840_bulk_out_data_callback(struct urb *urb)
786 {
787 struct moschip_port *mos7840_port;
788 struct usb_serial_port *port;
789 int status = urb->status;
790 int i;
791
792 mos7840_port = urb->context;
793 port = mos7840_port->port;
794 spin_lock(&mos7840_port->pool_lock);
795 for (i = 0; i < NUM_URBS; i++) {
796 if (urb == mos7840_port->write_urb_pool[i]) {
797 mos7840_port->busy[i] = 0;
798 break;
799 }
800 }
801 spin_unlock(&mos7840_port->pool_lock);
802
803 if (status) {
804 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
805 return;
806 }
807
808 if (mos7840_port_paranoia_check(port, __func__))
809 return;
810
811 if (mos7840_port->open)
812 tty_port_tty_wakeup(&port->port);
813
814 }
815
816 /************************************************************************/
817 /* 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 */
818 /************************************************************************/
819 #ifdef MCSSerialProbe
820 static int mos7840_serial_probe(struct usb_serial *serial,
821 const struct usb_device_id *id)
822 {
823
824 /*need to implement the mode_reg reading and updating\
825 structures usb_serial_ device_type\
826 (i.e num_ports, num_bulkin,bulkout etc) */
827 /* Also we can update the changes attach */
828 return 1;
829 }
830 #endif
831
832 /*****************************************************************************
833 * mos7840_open
834 * this function is called by the tty driver when a port is opened
835 * If successful, we return 0
836 * Otherwise we return a negative error number.
837 *****************************************************************************/
838
839 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
840 {
841 int response;
842 int j;
843 struct usb_serial *serial;
844 struct urb *urb;
845 __u16 Data;
846 int status;
847 struct moschip_port *mos7840_port;
848 struct moschip_port *port0;
849
850 if (mos7840_port_paranoia_check(port, __func__))
851 return -ENODEV;
852
853 serial = port->serial;
854
855 if (mos7840_serial_paranoia_check(serial, __func__))
856 return -ENODEV;
857
858 mos7840_port = mos7840_get_port_private(port);
859 port0 = mos7840_get_port_private(serial->port[0]);
860
861 if (mos7840_port == NULL || port0 == NULL)
862 return -ENODEV;
863
864 usb_clear_halt(serial->dev, port->write_urb->pipe);
865 usb_clear_halt(serial->dev, port->read_urb->pipe);
866 port0->open_ports++;
867
868 /* Initialising the write urb pool */
869 for (j = 0; j < NUM_URBS; ++j) {
870 urb = usb_alloc_urb(0, GFP_KERNEL);
871 mos7840_port->write_urb_pool[j] = urb;
872
873 if (urb == NULL) {
874 dev_err(&port->dev, "No more urbs???\n");
875 continue;
876 }
877
878 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
879 GFP_KERNEL);
880 if (!urb->transfer_buffer) {
881 usb_free_urb(urb);
882 mos7840_port->write_urb_pool[j] = NULL;
883 dev_err(&port->dev,
884 "%s-out of memory for urb buffers.\n",
885 __func__);
886 continue;
887 }
888 }
889
890 /*****************************************************************************
891 * Initialize MCS7840 -- Write Init values to corresponding Registers
892 *
893 * Register Index
894 * 1 : IER
895 * 2 : FCR
896 * 3 : LCR
897 * 4 : MCR
898 *
899 * 0x08 : SP1/2 Control Reg
900 *****************************************************************************/
901
902 /* NEED to check the following Block */
903
904 Data = 0x0;
905 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
906 if (status < 0) {
907 dev_dbg(&port->dev, "Reading Spreg failed\n");
908 goto err;
909 }
910 Data |= 0x80;
911 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
912 if (status < 0) {
913 dev_dbg(&port->dev, "writing Spreg failed\n");
914 goto err;
915 }
916
917 Data &= ~0x80;
918 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
919 if (status < 0) {
920 dev_dbg(&port->dev, "writing Spreg failed\n");
921 goto err;
922 }
923 /* End of block to be checked */
924
925 Data = 0x0;
926 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
927 &Data);
928 if (status < 0) {
929 dev_dbg(&port->dev, "Reading Controlreg failed\n");
930 goto err;
931 }
932 Data |= 0x08; /* Driver done bit */
933 Data |= 0x20; /* rx_disable */
934 status = mos7840_set_reg_sync(port,
935 mos7840_port->ControlRegOffset, Data);
936 if (status < 0) {
937 dev_dbg(&port->dev, "writing Controlreg failed\n");
938 goto err;
939 }
940 /* do register settings here */
941 /* Set all regs to the device default values. */
942 /***********************************
943 * First Disable all interrupts.
944 ***********************************/
945 Data = 0x00;
946 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
947 if (status < 0) {
948 dev_dbg(&port->dev, "disabling interrupts failed\n");
949 goto err;
950 }
951 /* Set FIFO_CONTROL_REGISTER to the default value */
952 Data = 0x00;
953 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
954 if (status < 0) {
955 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
956 goto err;
957 }
958
959 Data = 0xcf;
960 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
961 if (status < 0) {
962 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
963 goto err;
964 }
965
966 Data = 0x03;
967 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
968 mos7840_port->shadowLCR = Data;
969
970 Data = 0x0b;
971 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
972 mos7840_port->shadowMCR = Data;
973
974 Data = 0x00;
975 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
976 mos7840_port->shadowLCR = Data;
977
978 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
979 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
980
981 Data = 0x0c;
982 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
983
984 Data = 0x0;
985 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
986
987 Data = 0x00;
988 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
989
990 Data = Data & ~SERIAL_LCR_DLAB;
991 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
992 mos7840_port->shadowLCR = Data;
993
994 /* clearing Bulkin and Bulkout Fifo */
995 Data = 0x0;
996 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
997
998 Data = Data | 0x0c;
999 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1000
1001 Data = Data & ~0x0c;
1002 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1003 /* Finally enable all interrupts */
1004 Data = 0x0c;
1005 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1006
1007 /* clearing rx_disable */
1008 Data = 0x0;
1009 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1010 &Data);
1011 Data = Data & ~0x20;
1012 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1013 Data);
1014
1015 /* rx_negate */
1016 Data = 0x0;
1017 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1018 &Data);
1019 Data = Data | 0x10;
1020 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1021 Data);
1022
1023 /* Check to see if we've set up our endpoint info yet *
1024 * (can't set it up in mos7840_startup as the structures *
1025 * were not set up at that time.) */
1026 if (port0->open_ports == 1) {
1027 if (serial->port[0]->interrupt_in_buffer == NULL) {
1028 /* set up interrupt urb */
1029 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1030 serial->dev,
1031 usb_rcvintpipe(serial->dev,
1032 serial->port[0]->interrupt_in_endpointAddress),
1033 serial->port[0]->interrupt_in_buffer,
1034 serial->port[0]->interrupt_in_urb->
1035 transfer_buffer_length,
1036 mos7840_interrupt_callback,
1037 serial,
1038 serial->port[0]->interrupt_in_urb->interval);
1039
1040 /* start interrupt read for mos7840 *
1041 * will continue as long as mos7840 is connected */
1042
1043 response =
1044 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1045 GFP_KERNEL);
1046 if (response) {
1047 dev_err(&port->dev, "%s - Error %d submitting "
1048 "interrupt urb\n", __func__, response);
1049 }
1050
1051 }
1052
1053 }
1054
1055 /* see if we've set up our endpoint info yet *
1056 * (can't set it up in mos7840_startup as the *
1057 * structures were not set up at that time.) */
1058
1059 dev_dbg(&port->dev, "port number is %d\n", port->port_number);
1060 dev_dbg(&port->dev, "minor number is %d\n", port->minor);
1061 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1062 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1063 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1064 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
1065 mos7840_port->read_urb = port->read_urb;
1066
1067 /* set up our bulk in urb */
1068 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1069 usb_fill_bulk_urb(mos7840_port->read_urb,
1070 serial->dev,
1071 usb_rcvbulkpipe(serial->dev,
1072 (port->bulk_in_endpointAddress) + 2),
1073 port->bulk_in_buffer,
1074 mos7840_port->read_urb->transfer_buffer_length,
1075 mos7840_bulk_in_callback, mos7840_port);
1076 } else {
1077 usb_fill_bulk_urb(mos7840_port->read_urb,
1078 serial->dev,
1079 usb_rcvbulkpipe(serial->dev,
1080 port->bulk_in_endpointAddress),
1081 port->bulk_in_buffer,
1082 mos7840_port->read_urb->transfer_buffer_length,
1083 mos7840_bulk_in_callback, mos7840_port);
1084 }
1085
1086 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
1087 mos7840_port->read_urb_busy = true;
1088 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1089 if (response) {
1090 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1091 __func__, response);
1092 mos7840_port->read_urb_busy = false;
1093 }
1094
1095 /* initialize our wait queues */
1096 init_waitqueue_head(&mos7840_port->wait_chase);
1097
1098 /* initialize our port settings */
1099 /* Must set to enable ints! */
1100 mos7840_port->shadowMCR = MCR_MASTER_IE;
1101 /* send a open port command */
1102 mos7840_port->open = 1;
1103 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1104
1105 return 0;
1106 err:
1107 for (j = 0; j < NUM_URBS; ++j) {
1108 urb = mos7840_port->write_urb_pool[j];
1109 if (!urb)
1110 continue;
1111 kfree(urb->transfer_buffer);
1112 usb_free_urb(urb);
1113 }
1114 return status;
1115 }
1116
1117 /*****************************************************************************
1118 * mos7840_chars_in_buffer
1119 * this function is called by the tty driver when it wants to know how many
1120 * bytes of data we currently have outstanding in the port (data that has
1121 * been written, but hasn't made it out the port yet)
1122 * If successful, we return the number of bytes left to be written in the
1123 * system,
1124 * Otherwise we return zero.
1125 *****************************************************************************/
1126
1127 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1128 {
1129 struct usb_serial_port *port = tty->driver_data;
1130 int i;
1131 int chars = 0;
1132 unsigned long flags;
1133 struct moschip_port *mos7840_port;
1134
1135 if (mos7840_port_paranoia_check(port, __func__))
1136 return 0;
1137
1138 mos7840_port = mos7840_get_port_private(port);
1139 if (mos7840_port == NULL)
1140 return 0;
1141
1142 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1143 for (i = 0; i < NUM_URBS; ++i) {
1144 if (mos7840_port->busy[i]) {
1145 struct urb *urb = mos7840_port->write_urb_pool[i];
1146 chars += urb->transfer_buffer_length;
1147 }
1148 }
1149 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1150 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1151 return chars;
1152
1153 }
1154
1155 /*****************************************************************************
1156 * mos7840_close
1157 * this function is called by the tty driver when a port is closed
1158 *****************************************************************************/
1159
1160 static void mos7840_close(struct usb_serial_port *port)
1161 {
1162 struct usb_serial *serial;
1163 struct moschip_port *mos7840_port;
1164 struct moschip_port *port0;
1165 int j;
1166 __u16 Data;
1167
1168 if (mos7840_port_paranoia_check(port, __func__))
1169 return;
1170
1171 serial = mos7840_get_usb_serial(port, __func__);
1172 if (!serial)
1173 return;
1174
1175 mos7840_port = mos7840_get_port_private(port);
1176 port0 = mos7840_get_port_private(serial->port[0]);
1177
1178 if (mos7840_port == NULL || port0 == NULL)
1179 return;
1180
1181 for (j = 0; j < NUM_URBS; ++j)
1182 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1183
1184 /* Freeing Write URBs */
1185 for (j = 0; j < NUM_URBS; ++j) {
1186 if (mos7840_port->write_urb_pool[j]) {
1187 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1188 kfree(mos7840_port->write_urb_pool[j]->
1189 transfer_buffer);
1190
1191 usb_free_urb(mos7840_port->write_urb_pool[j]);
1192 }
1193 }
1194
1195 usb_kill_urb(mos7840_port->write_urb);
1196 usb_kill_urb(mos7840_port->read_urb);
1197 mos7840_port->read_urb_busy = false;
1198
1199 port0->open_ports--;
1200 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports);
1201 if (port0->open_ports == 0) {
1202 if (serial->port[0]->interrupt_in_urb) {
1203 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
1204 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1205 }
1206 }
1207
1208 if (mos7840_port->write_urb) {
1209 /* if this urb had a transfer buffer already (old tx) free it */
1210 kfree(mos7840_port->write_urb->transfer_buffer);
1211 usb_free_urb(mos7840_port->write_urb);
1212 }
1213
1214 Data = 0x0;
1215 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1216
1217 Data = 0x00;
1218 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1219
1220 mos7840_port->open = 0;
1221 }
1222
1223 /************************************************************************
1224 *
1225 * mos7840_block_until_chase_response
1226 *
1227 * This function will block the close until one of the following:
1228 * 1. Response to our Chase comes from mos7840
1229 * 2. A timeout of 10 seconds without activity has expired
1230 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1231 *
1232 ************************************************************************/
1233
1234 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1235 struct moschip_port *mos7840_port)
1236 {
1237 int timeout = msecs_to_jiffies(1000);
1238 int wait = 10;
1239 int count;
1240
1241 while (1) {
1242 count = mos7840_chars_in_buffer(tty);
1243
1244 /* Check for Buffer status */
1245 if (count <= 0)
1246 return;
1247
1248 /* Block the thread for a while */
1249 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1250 timeout);
1251 /* No activity.. count down section */
1252 wait--;
1253 if (wait == 0) {
1254 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__);
1255 return;
1256 } else {
1257 /* Reset timeout value back to seconds */
1258 wait = 10;
1259 }
1260 }
1261
1262 }
1263
1264 /*****************************************************************************
1265 * mos7840_break
1266 * this function sends a break to the port
1267 *****************************************************************************/
1268 static void mos7840_break(struct tty_struct *tty, int break_state)
1269 {
1270 struct usb_serial_port *port = tty->driver_data;
1271 unsigned char data;
1272 struct usb_serial *serial;
1273 struct moschip_port *mos7840_port;
1274
1275 if (mos7840_port_paranoia_check(port, __func__))
1276 return;
1277
1278 serial = mos7840_get_usb_serial(port, __func__);
1279 if (!serial)
1280 return;
1281
1282 mos7840_port = mos7840_get_port_private(port);
1283
1284 if (mos7840_port == NULL)
1285 return;
1286
1287 /* flush and block until tx is empty */
1288 mos7840_block_until_chase_response(tty, mos7840_port);
1289
1290 if (break_state == -1)
1291 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1292 else
1293 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1294
1295 /* FIXME: no locking on shadowLCR anywhere in driver */
1296 mos7840_port->shadowLCR = data;
1297 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1298 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1299 mos7840_port->shadowLCR);
1300 }
1301
1302 /*****************************************************************************
1303 * mos7840_write_room
1304 * this function is called by the tty driver when it wants to know how many
1305 * bytes of data we can accept for a specific port.
1306 * If successful, we return the amount of room that we have for this port
1307 * Otherwise we return a negative error number.
1308 *****************************************************************************/
1309
1310 static int mos7840_write_room(struct tty_struct *tty)
1311 {
1312 struct usb_serial_port *port = tty->driver_data;
1313 int i;
1314 int room = 0;
1315 unsigned long flags;
1316 struct moschip_port *mos7840_port;
1317
1318 if (mos7840_port_paranoia_check(port, __func__))
1319 return -1;
1320
1321 mos7840_port = mos7840_get_port_private(port);
1322 if (mos7840_port == NULL)
1323 return -1;
1324
1325 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1326 for (i = 0; i < NUM_URBS; ++i) {
1327 if (!mos7840_port->busy[i])
1328 room += URB_TRANSFER_BUFFER_SIZE;
1329 }
1330 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1331
1332 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1333 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
1334 return room;
1335
1336 }
1337
1338 /*****************************************************************************
1339 * mos7840_write
1340 * this function is called by the tty driver when data should be written to
1341 * the port.
1342 * If successful, we return the number of bytes written, otherwise we
1343 * return a negative error number.
1344 *****************************************************************************/
1345
1346 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1347 const unsigned char *data, int count)
1348 {
1349 int status;
1350 int i;
1351 int bytes_sent = 0;
1352 int transfer_size;
1353 unsigned long flags;
1354
1355 struct moschip_port *mos7840_port;
1356 struct usb_serial *serial;
1357 struct urb *urb;
1358 /* __u16 Data; */
1359 const unsigned char *current_position = data;
1360 unsigned char *data1;
1361
1362 #ifdef NOTMOS7840
1363 Data = 0x00;
1364 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1365 mos7840_port->shadowLCR = Data;
1366 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1367 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1368
1369 /* Data = 0x03; */
1370 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1371 /* mos7840_port->shadowLCR=Data;//Need to add later */
1372
1373 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1374 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1375
1376 /* Data = 0x0c; */
1377 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1378 Data = 0x00;
1379 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1380 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
1381
1382 Data = 0x0;
1383 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1384 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
1385
1386 Data = Data & ~SERIAL_LCR_DLAB;
1387 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1388 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1389 #endif
1390
1391 if (mos7840_port_paranoia_check(port, __func__))
1392 return -1;
1393
1394 serial = port->serial;
1395 if (mos7840_serial_paranoia_check(serial, __func__))
1396 return -1;
1397
1398 mos7840_port = mos7840_get_port_private(port);
1399 if (mos7840_port == NULL)
1400 return -1;
1401
1402 /* try to find a free urb in the list */
1403 urb = NULL;
1404
1405 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1406 for (i = 0; i < NUM_URBS; ++i) {
1407 if (!mos7840_port->busy[i]) {
1408 mos7840_port->busy[i] = 1;
1409 urb = mos7840_port->write_urb_pool[i];
1410 dev_dbg(&port->dev, "URB:%d\n", i);
1411 break;
1412 }
1413 }
1414 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1415
1416 if (urb == NULL) {
1417 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
1418 goto exit;
1419 }
1420
1421 if (urb->transfer_buffer == NULL) {
1422 urb->transfer_buffer =
1423 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1424
1425 if (urb->transfer_buffer == NULL) {
1426 dev_err_console(port, "%s no more kernel memory...\n",
1427 __func__);
1428 goto exit;
1429 }
1430 }
1431 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1432
1433 memcpy(urb->transfer_buffer, current_position, transfer_size);
1434
1435 /* fill urb with data and submit */
1436 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1437 usb_fill_bulk_urb(urb,
1438 serial->dev,
1439 usb_sndbulkpipe(serial->dev,
1440 (port->bulk_out_endpointAddress) + 2),
1441 urb->transfer_buffer,
1442 transfer_size,
1443 mos7840_bulk_out_data_callback, mos7840_port);
1444 } else {
1445 usb_fill_bulk_urb(urb,
1446 serial->dev,
1447 usb_sndbulkpipe(serial->dev,
1448 port->bulk_out_endpointAddress),
1449 urb->transfer_buffer,
1450 transfer_size,
1451 mos7840_bulk_out_data_callback, mos7840_port);
1452 }
1453
1454 data1 = urb->transfer_buffer;
1455 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
1456
1457 /* Turn on LED */
1458 if (mos7840_port->has_led && !mos7840_port->led_flag) {
1459 mos7840_port->led_flag = true;
1460 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);
1461 mod_timer(&mos7840_port->led_timer1,
1462 jiffies + msecs_to_jiffies(LED_ON_MS));
1463 }
1464
1465 /* send it down the pipe */
1466 status = usb_submit_urb(urb, GFP_ATOMIC);
1467
1468 if (status) {
1469 mos7840_port->busy[i] = 0;
1470 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1471 "with status = %d\n", __func__, status);
1472 bytes_sent = status;
1473 goto exit;
1474 }
1475 bytes_sent = transfer_size;
1476 port->icount.tx += transfer_size;
1477 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx);
1478 exit:
1479 return bytes_sent;
1480
1481 }
1482
1483 /*****************************************************************************
1484 * mos7840_throttle
1485 * this function is called by the tty driver when it wants to stop the data
1486 * being read from the port.
1487 *****************************************************************************/
1488
1489 static void mos7840_throttle(struct tty_struct *tty)
1490 {
1491 struct usb_serial_port *port = tty->driver_data;
1492 struct moschip_port *mos7840_port;
1493 int status;
1494
1495 if (mos7840_port_paranoia_check(port, __func__))
1496 return;
1497
1498 mos7840_port = mos7840_get_port_private(port);
1499
1500 if (mos7840_port == NULL)
1501 return;
1502
1503 if (!mos7840_port->open) {
1504 dev_dbg(&port->dev, "%s", "port not opened\n");
1505 return;
1506 }
1507
1508 /* if we are implementing XON/XOFF, send the stop character */
1509 if (I_IXOFF(tty)) {
1510 unsigned char stop_char = STOP_CHAR(tty);
1511 status = mos7840_write(tty, port, &stop_char, 1);
1512 if (status <= 0)
1513 return;
1514 }
1515 /* if we are implementing RTS/CTS, toggle that line */
1516 if (tty->termios.c_cflag & CRTSCTS) {
1517 mos7840_port->shadowMCR &= ~MCR_RTS;
1518 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1519 mos7840_port->shadowMCR);
1520 if (status < 0)
1521 return;
1522 }
1523 }
1524
1525 /*****************************************************************************
1526 * mos7840_unthrottle
1527 * this function is called by the tty driver when it wants to resume
1528 * the data being read from the port (called after mos7840_throttle is
1529 * called)
1530 *****************************************************************************/
1531 static void mos7840_unthrottle(struct tty_struct *tty)
1532 {
1533 struct usb_serial_port *port = tty->driver_data;
1534 int status;
1535 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1536
1537 if (mos7840_port_paranoia_check(port, __func__))
1538 return;
1539
1540 if (mos7840_port == NULL)
1541 return;
1542
1543 if (!mos7840_port->open) {
1544 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1545 return;
1546 }
1547
1548 /* if we are implementing XON/XOFF, send the start character */
1549 if (I_IXOFF(tty)) {
1550 unsigned char start_char = START_CHAR(tty);
1551 status = mos7840_write(tty, port, &start_char, 1);
1552 if (status <= 0)
1553 return;
1554 }
1555
1556 /* if we are implementing RTS/CTS, toggle that line */
1557 if (tty->termios.c_cflag & CRTSCTS) {
1558 mos7840_port->shadowMCR |= MCR_RTS;
1559 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1560 mos7840_port->shadowMCR);
1561 if (status < 0)
1562 return;
1563 }
1564 }
1565
1566 static int mos7840_tiocmget(struct tty_struct *tty)
1567 {
1568 struct usb_serial_port *port = tty->driver_data;
1569 struct moschip_port *mos7840_port;
1570 unsigned int result;
1571 __u16 msr;
1572 __u16 mcr;
1573 int status;
1574 mos7840_port = mos7840_get_port_private(port);
1575
1576 if (mos7840_port == NULL)
1577 return -ENODEV;
1578
1579 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1580 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1581 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1582 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1583 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1584 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1585 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1586 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1587 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1588
1589 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1590
1591 return result;
1592 }
1593
1594 static int mos7840_tiocmset(struct tty_struct *tty,
1595 unsigned int set, unsigned int clear)
1596 {
1597 struct usb_serial_port *port = tty->driver_data;
1598 struct moschip_port *mos7840_port;
1599 unsigned int mcr;
1600 int status;
1601
1602 mos7840_port = mos7840_get_port_private(port);
1603
1604 if (mos7840_port == NULL)
1605 return -ENODEV;
1606
1607 /* FIXME: What locks the port registers ? */
1608 mcr = mos7840_port->shadowMCR;
1609 if (clear & TIOCM_RTS)
1610 mcr &= ~MCR_RTS;
1611 if (clear & TIOCM_DTR)
1612 mcr &= ~MCR_DTR;
1613 if (clear & TIOCM_LOOP)
1614 mcr &= ~MCR_LOOPBACK;
1615
1616 if (set & TIOCM_RTS)
1617 mcr |= MCR_RTS;
1618 if (set & TIOCM_DTR)
1619 mcr |= MCR_DTR;
1620 if (set & TIOCM_LOOP)
1621 mcr |= MCR_LOOPBACK;
1622
1623 mos7840_port->shadowMCR = mcr;
1624
1625 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1626 if (status < 0) {
1627 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1628 return status;
1629 }
1630
1631 return 0;
1632 }
1633
1634 /*****************************************************************************
1635 * mos7840_calc_baud_rate_divisor
1636 * this function calculates the proper baud rate divisor for the specified
1637 * baud rate.
1638 *****************************************************************************/
1639 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1640 int baudRate, int *divisor,
1641 __u16 *clk_sel_val)
1642 {
1643 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1644
1645 if (baudRate <= 115200) {
1646 *divisor = 115200 / baudRate;
1647 *clk_sel_val = 0x0;
1648 }
1649 if ((baudRate > 115200) && (baudRate <= 230400)) {
1650 *divisor = 230400 / baudRate;
1651 *clk_sel_val = 0x10;
1652 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1653 *divisor = 403200 / baudRate;
1654 *clk_sel_val = 0x20;
1655 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1656 *divisor = 460800 / baudRate;
1657 *clk_sel_val = 0x30;
1658 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1659 *divisor = 806400 / baudRate;
1660 *clk_sel_val = 0x40;
1661 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1662 *divisor = 921600 / baudRate;
1663 *clk_sel_val = 0x50;
1664 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1665 *divisor = 1572864 / baudRate;
1666 *clk_sel_val = 0x60;
1667 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1668 *divisor = 3145728 / baudRate;
1669 *clk_sel_val = 0x70;
1670 }
1671 return 0;
1672
1673 #ifdef NOTMCS7840
1674
1675 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1676 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1677 *divisor = mos7840_divisor_table[i].Divisor;
1678 return 0;
1679 }
1680 }
1681
1682 /* After trying for all the standard baud rates *
1683 * Try calculating the divisor for this baud rate */
1684
1685 if (baudrate > 75 && baudrate < 230400) {
1686 /* get the divisor */
1687 custom = (__u16) (230400L / baudrate);
1688
1689 /* Check for round off */
1690 round1 = (__u16) (2304000L / baudrate);
1691 round = (__u16) (round1 - (custom * 10));
1692 if (round > 4)
1693 custom++;
1694 *divisor = custom;
1695
1696 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
1697 return 0;
1698 }
1699
1700 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
1701 return -1;
1702 #endif
1703 }
1704
1705 /*****************************************************************************
1706 * mos7840_send_cmd_write_baud_rate
1707 * this function sends the proper command to change the baud rate of the
1708 * specified port.
1709 *****************************************************************************/
1710
1711 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1712 int baudRate)
1713 {
1714 int divisor = 0;
1715 int status;
1716 __u16 Data;
1717 unsigned char number;
1718 __u16 clk_sel_val;
1719 struct usb_serial_port *port;
1720
1721 if (mos7840_port == NULL)
1722 return -1;
1723
1724 port = mos7840_port->port;
1725 if (mos7840_port_paranoia_check(port, __func__))
1726 return -1;
1727
1728 if (mos7840_serial_paranoia_check(port->serial, __func__))
1729 return -1;
1730
1731 number = mos7840_port->port->port_number;
1732
1733 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate);
1734 /* reset clk_uart_sel in spregOffset */
1735 if (baudRate > 115200) {
1736 #ifdef HW_flow_control
1737 /* NOTE: need to see the pther register to modify */
1738 /* setting h/w flow control bit to 1 */
1739 Data = 0x2b;
1740 mos7840_port->shadowMCR = Data;
1741 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1742 Data);
1743 if (status < 0) {
1744 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1745 return -1;
1746 }
1747 #endif
1748
1749 } else {
1750 #ifdef HW_flow_control
1751 /* setting h/w flow control bit to 0 */
1752 Data = 0xb;
1753 mos7840_port->shadowMCR = Data;
1754 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1755 Data);
1756 if (status < 0) {
1757 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1758 return -1;
1759 }
1760 #endif
1761
1762 }
1763
1764 if (1) { /* baudRate <= 115200) */
1765 clk_sel_val = 0x0;
1766 Data = 0x0;
1767 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1768 &clk_sel_val);
1769 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1770 &Data);
1771 if (status < 0) {
1772 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1773 return -1;
1774 }
1775 Data = (Data & 0x8f) | clk_sel_val;
1776 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1777 Data);
1778 if (status < 0) {
1779 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1780 return -1;
1781 }
1782 /* Calculate the Divisor */
1783
1784 if (status) {
1785 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1786 return status;
1787 }
1788 /* Enable access to divisor latch */
1789 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1790 mos7840_port->shadowLCR = Data;
1791 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1792
1793 /* Write the divisor */
1794 Data = (unsigned char)(divisor & 0xff);
1795 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1796 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1797
1798 Data = (unsigned char)((divisor & 0xff00) >> 8);
1799 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1800 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1801
1802 /* Disable access to divisor latch */
1803 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1804 mos7840_port->shadowLCR = Data;
1805 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1806
1807 }
1808 return status;
1809 }
1810
1811 /*****************************************************************************
1812 * mos7840_change_port_settings
1813 * This routine is called to set the UART on the device to match
1814 * the specified new settings.
1815 *****************************************************************************/
1816
1817 static void mos7840_change_port_settings(struct tty_struct *tty,
1818 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1819 {
1820 int baud;
1821 unsigned cflag;
1822 unsigned iflag;
1823 __u8 lData;
1824 __u8 lParity;
1825 __u8 lStop;
1826 int status;
1827 __u16 Data;
1828 struct usb_serial_port *port;
1829 struct usb_serial *serial;
1830
1831 if (mos7840_port == NULL)
1832 return;
1833
1834 port = mos7840_port->port;
1835
1836 if (mos7840_port_paranoia_check(port, __func__))
1837 return;
1838
1839 if (mos7840_serial_paranoia_check(port->serial, __func__))
1840 return;
1841
1842 serial = port->serial;
1843
1844 if (!mos7840_port->open) {
1845 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1846 return;
1847 }
1848
1849 lData = LCR_BITS_8;
1850 lStop = LCR_STOP_1;
1851 lParity = LCR_PAR_NONE;
1852
1853 cflag = tty->termios.c_cflag;
1854 iflag = tty->termios.c_iflag;
1855
1856 /* Change the number of bits */
1857 if (cflag & CSIZE) {
1858 switch (cflag & CSIZE) {
1859 case CS5:
1860 lData = LCR_BITS_5;
1861 break;
1862
1863 case CS6:
1864 lData = LCR_BITS_6;
1865 break;
1866
1867 case CS7:
1868 lData = LCR_BITS_7;
1869 break;
1870 default:
1871 case CS8:
1872 lData = LCR_BITS_8;
1873 break;
1874 }
1875 }
1876 /* Change the Parity bit */
1877 if (cflag & PARENB) {
1878 if (cflag & PARODD) {
1879 lParity = LCR_PAR_ODD;
1880 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1881 } else {
1882 lParity = LCR_PAR_EVEN;
1883 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1884 }
1885
1886 } else {
1887 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1888 }
1889
1890 if (cflag & CMSPAR)
1891 lParity = lParity | 0x20;
1892
1893 /* Change the Stop bit */
1894 if (cflag & CSTOPB) {
1895 lStop = LCR_STOP_2;
1896 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1897 } else {
1898 lStop = LCR_STOP_1;
1899 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1900 }
1901
1902 /* Update the LCR with the correct value */
1903 mos7840_port->shadowLCR &=
1904 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1905 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1906
1907 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1908 mos7840_port->shadowLCR);
1909 /* Disable Interrupts */
1910 Data = 0x00;
1911 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1912
1913 Data = 0x00;
1914 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1915
1916 Data = 0xcf;
1917 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1918
1919 /* Send the updated LCR value to the mos7840 */
1920 Data = mos7840_port->shadowLCR;
1921
1922 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1923
1924 Data = 0x00b;
1925 mos7840_port->shadowMCR = Data;
1926 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1927 Data = 0x00b;
1928 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1929
1930 /* set up the MCR register and send it to the mos7840 */
1931
1932 mos7840_port->shadowMCR = MCR_MASTER_IE;
1933 if (cflag & CBAUD)
1934 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1935
1936 if (cflag & CRTSCTS)
1937 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1938 else
1939 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1940
1941 Data = mos7840_port->shadowMCR;
1942 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1943
1944 /* Determine divisor based on baud rate */
1945 baud = tty_get_baud_rate(tty);
1946
1947 if (!baud) {
1948 /* pick a default, any default... */
1949 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
1950 baud = 9600;
1951 }
1952
1953 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
1954 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1955
1956 /* Enable Interrupts */
1957 Data = 0x0c;
1958 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1959
1960 if (mos7840_port->read_urb_busy == false) {
1961 mos7840_port->read_urb_busy = true;
1962 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
1963 if (status) {
1964 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1965 status);
1966 mos7840_port->read_urb_busy = false;
1967 }
1968 }
1969 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1970 mos7840_port->shadowLCR);
1971 }
1972
1973 /*****************************************************************************
1974 * mos7840_set_termios
1975 * this function is called by the tty driver when it wants to change
1976 * the termios structure
1977 *****************************************************************************/
1978
1979 static void mos7840_set_termios(struct tty_struct *tty,
1980 struct usb_serial_port *port,
1981 struct ktermios *old_termios)
1982 {
1983 int status;
1984 unsigned int cflag;
1985 struct usb_serial *serial;
1986 struct moschip_port *mos7840_port;
1987
1988 if (mos7840_port_paranoia_check(port, __func__))
1989 return;
1990
1991 serial = port->serial;
1992
1993 if (mos7840_serial_paranoia_check(serial, __func__))
1994 return;
1995
1996 mos7840_port = mos7840_get_port_private(port);
1997
1998 if (mos7840_port == NULL)
1999 return;
2000
2001 if (!mos7840_port->open) {
2002 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
2003 return;
2004 }
2005
2006 dev_dbg(&port->dev, "%s", "setting termios - \n");
2007
2008 cflag = tty->termios.c_cflag;
2009
2010 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2011 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
2012 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2013 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2014
2015 /* change the port settings to the new ones specified */
2016
2017 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2018
2019 if (!mos7840_port->read_urb) {
2020 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
2021 return;
2022 }
2023
2024 if (mos7840_port->read_urb_busy == false) {
2025 mos7840_port->read_urb_busy = true;
2026 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2027 if (status) {
2028 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
2029 status);
2030 mos7840_port->read_urb_busy = false;
2031 }
2032 }
2033 }
2034
2035 /*****************************************************************************
2036 * mos7840_get_lsr_info - get line status register info
2037 *
2038 * Purpose: Let user call ioctl() to get info when the UART physically
2039 * is emptied. On bus types like RS485, the transmitter must
2040 * release the bus after transmitting. This must be done when
2041 * the transmit shift register is empty, not be done when the
2042 * transmit holding register is empty. This functionality
2043 * allows an RS485 driver to be written in user space.
2044 *****************************************************************************/
2045
2046 static int mos7840_get_lsr_info(struct tty_struct *tty,
2047 unsigned int __user *value)
2048 {
2049 int count;
2050 unsigned int result = 0;
2051
2052 count = mos7840_chars_in_buffer(tty);
2053 if (count == 0)
2054 result = TIOCSER_TEMT;
2055
2056 if (copy_to_user(value, &result, sizeof(int)))
2057 return -EFAULT;
2058 return 0;
2059 }
2060
2061 /*****************************************************************************
2062 * mos7840_get_serial_info
2063 * function to get information about serial port
2064 *****************************************************************************/
2065
2066 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2067 struct serial_struct __user *retinfo)
2068 {
2069 struct serial_struct tmp;
2070
2071 if (mos7840_port == NULL)
2072 return -1;
2073
2074 if (!retinfo)
2075 return -EFAULT;
2076
2077 memset(&tmp, 0, sizeof(tmp));
2078
2079 tmp.type = PORT_16550A;
2080 tmp.line = mos7840_port->port->minor;
2081 tmp.port = mos7840_port->port->port_number;
2082 tmp.irq = 0;
2083 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2084 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2085 tmp.baud_base = 9600;
2086 tmp.close_delay = 5 * HZ;
2087 tmp.closing_wait = 30 * HZ;
2088
2089 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2090 return -EFAULT;
2091 return 0;
2092 }
2093
2094 /*****************************************************************************
2095 * SerialIoctl
2096 * this function handles any ioctl calls to the driver
2097 *****************************************************************************/
2098
2099 static int mos7840_ioctl(struct tty_struct *tty,
2100 unsigned int cmd, unsigned long arg)
2101 {
2102 struct usb_serial_port *port = tty->driver_data;
2103 void __user *argp = (void __user *)arg;
2104 struct moschip_port *mos7840_port;
2105
2106 if (mos7840_port_paranoia_check(port, __func__))
2107 return -1;
2108
2109 mos7840_port = mos7840_get_port_private(port);
2110
2111 if (mos7840_port == NULL)
2112 return -1;
2113
2114 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
2115
2116 switch (cmd) {
2117 /* return number of bytes available */
2118
2119 case TIOCSERGETLSR:
2120 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
2121 return mos7840_get_lsr_info(tty, argp);
2122
2123 case TIOCGSERIAL:
2124 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
2125 return mos7840_get_serial_info(mos7840_port, argp);
2126
2127 case TIOCSSERIAL:
2128 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
2129 break;
2130 default:
2131 break;
2132 }
2133 return -ENOIOCTLCMD;
2134 }
2135
2136 static int mos7810_check(struct usb_serial *serial)
2137 {
2138 int i, pass_count = 0;
2139 u8 *buf;
2140 __u16 data = 0, mcr_data = 0;
2141 __u16 test_pattern = 0x55AA;
2142 int res;
2143
2144 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2145 if (!buf)
2146 return 0; /* failed to identify 7810 */
2147
2148 /* Store MCR setting */
2149 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2150 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2151 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2152 if (res == VENDOR_READ_LENGTH)
2153 mcr_data = *buf;
2154
2155 for (i = 0; i < 16; i++) {
2156 /* Send the 1-bit test pattern out to MCS7810 test pin */
2157 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2158 MCS_WRREQ, MCS_WR_RTYPE,
2159 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2160 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2161
2162 /* Read the test pattern back */
2163 res = usb_control_msg(serial->dev,
2164 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ,
2165 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2166 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2167 if (res == VENDOR_READ_LENGTH)
2168 data = *buf;
2169
2170 /* If this is a MCS7810 device, both test patterns must match */
2171 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2172 break;
2173
2174 pass_count++;
2175 }
2176
2177 /* Restore MCR setting */
2178 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2179 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2180 0, MOS_WDR_TIMEOUT);
2181
2182 kfree(buf);
2183
2184 if (pass_count == 16)
2185 return 1;
2186
2187 return 0;
2188 }
2189
2190 static int mos7840_calc_num_ports(struct usb_serial *serial)
2191 {
2192 __u16 data = 0x00;
2193 u8 *buf;
2194 int mos7840_num_ports;
2195
2196 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2197 if (buf) {
2198 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2199 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2200 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2201 data = *buf;
2202 kfree(buf);
2203 }
2204
2205 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||
2206 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {
2207 device_type = serial->dev->descriptor.idProduct;
2208 } else {
2209 /* For a MCS7840 device GPIO0 must be set to 1 */
2210 if ((data & 0x01) == 1)
2211 device_type = MOSCHIP_DEVICE_ID_7840;
2212 else if (mos7810_check(serial))
2213 device_type = MOSCHIP_DEVICE_ID_7810;
2214 else
2215 device_type = MOSCHIP_DEVICE_ID_7820;
2216 }
2217
2218 mos7840_num_ports = (device_type >> 4) & 0x000F;
2219 serial->num_bulk_in = mos7840_num_ports;
2220 serial->num_bulk_out = mos7840_num_ports;
2221 serial->num_ports = mos7840_num_ports;
2222
2223 return mos7840_num_ports;
2224 }
2225
2226 static int mos7840_port_probe(struct usb_serial_port *port)
2227 {
2228 struct usb_serial *serial = port->serial;
2229 struct moschip_port *mos7840_port;
2230 int status;
2231 int pnum;
2232 __u16 Data;
2233
2234 /* we set up the pointers to the endpoints in the mos7840_open *
2235 * function, as the structures aren't created yet. */
2236
2237 pnum = port->port_number;
2238
2239 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2240 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2241 if (mos7840_port == NULL) {
2242 dev_err(&port->dev, "%s - Out of memory\n", __func__);
2243 return -ENOMEM;
2244 }
2245
2246 /* Initialize all port interrupt end point to port 0 int
2247 * endpoint. Our device has only one interrupt end point
2248 * common to all port */
2249
2250 mos7840_port->port = port;
2251 mos7840_set_port_private(port, mos7840_port);
2252 spin_lock_init(&mos7840_port->pool_lock);
2253
2254 /* minor is not initialised until later by
2255 * usb-serial.c:get_free_serial() and cannot therefore be used
2256 * to index device instances */
2257 mos7840_port->port_num = pnum + 1;
2258 dev_dbg(&port->dev, "port->minor = %d\n", port->minor);
2259 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2260
2261 if (mos7840_port->port_num == 1) {
2262 mos7840_port->SpRegOffset = 0x0;
2263 mos7840_port->ControlRegOffset = 0x1;
2264 mos7840_port->DcrRegOffset = 0x4;
2265 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2266 mos7840_port->SpRegOffset = 0x8;
2267 mos7840_port->ControlRegOffset = 0x9;
2268 mos7840_port->DcrRegOffset = 0x16;
2269 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2270 mos7840_port->SpRegOffset = 0xa;
2271 mos7840_port->ControlRegOffset = 0xb;
2272 mos7840_port->DcrRegOffset = 0x19;
2273 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2274 mos7840_port->SpRegOffset = 0xa;
2275 mos7840_port->ControlRegOffset = 0xb;
2276 mos7840_port->DcrRegOffset = 0x19;
2277 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2278 mos7840_port->SpRegOffset = 0xc;
2279 mos7840_port->ControlRegOffset = 0xd;
2280 mos7840_port->DcrRegOffset = 0x1c;
2281 }
2282 mos7840_dump_serial_port(port, mos7840_port);
2283 mos7840_set_port_private(port, mos7840_port);
2284
2285 /* enable rx_disable bit in control register */
2286 status = mos7840_get_reg_sync(port,
2287 mos7840_port->ControlRegOffset, &Data);
2288 if (status < 0) {
2289 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2290 goto out;
2291 } else
2292 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2293 Data |= 0x08; /* setting driver done bit */
2294 Data |= 0x04; /* sp1_bit to have cts change reflect in
2295 modem status reg */
2296
2297 /* Data |= 0x20; //rx_disable bit */
2298 status = mos7840_set_reg_sync(port,
2299 mos7840_port->ControlRegOffset, Data);
2300 if (status < 0) {
2301 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2302 goto out;
2303 } else
2304 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2305
2306 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2307 and 0x24 in DCR3 */
2308 Data = 0x01;
2309 status = mos7840_set_reg_sync(port,
2310 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2311 if (status < 0) {
2312 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2313 goto out;
2314 } else
2315 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
2316
2317 Data = 0x05;
2318 status = mos7840_set_reg_sync(port,
2319 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2320 if (status < 0) {
2321 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2322 goto out;
2323 } else
2324 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
2325
2326 Data = 0x24;
2327 status = mos7840_set_reg_sync(port,
2328 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2329 if (status < 0) {
2330 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2331 goto out;
2332 } else
2333 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
2334
2335 /* write values in clkstart0x0 and clkmulti 0x20 */
2336 Data = 0x0;
2337 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2338 if (status < 0) {
2339 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2340 goto out;
2341 } else
2342 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2343
2344 Data = 0x20;
2345 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2346 if (status < 0) {
2347 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2348 goto error;
2349 } else
2350 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
2351
2352 /* write value 0x0 to scratchpad register */
2353 Data = 0x00;
2354 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2355 if (status < 0) {
2356 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2357 goto out;
2358 } else
2359 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2360
2361 /* Zero Length flag register */
2362 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2363 Data = 0xff;
2364 status = mos7840_set_reg_sync(port,
2365 (__u16) (ZLP_REG1 +
2366 ((__u16)mos7840_port->port_num)), Data);
2367 dev_dbg(&port->dev, "ZLIP offset %x\n",
2368 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
2369 if (status < 0) {
2370 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2371 goto out;
2372 } else
2373 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2374 } else {
2375 Data = 0xff;
2376 status = mos7840_set_reg_sync(port,
2377 (__u16) (ZLP_REG1 +
2378 ((__u16)mos7840_port->port_num) - 0x1), Data);
2379 dev_dbg(&port->dev, "ZLIP offset %x\n",
2380 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
2381 if (status < 0) {
2382 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2383 goto out;
2384 } else
2385 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
2386
2387 }
2388 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2389 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2390 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2391 GFP_KERNEL);
2392 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2393 !mos7840_port->dr) {
2394 status = -ENOMEM;
2395 goto error;
2396 }
2397
2398 mos7840_port->has_led = false;
2399
2400 /* Initialize LED timers */
2401 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2402 mos7840_port->has_led = true;
2403
2404 init_timer(&mos7840_port->led_timer1);
2405 mos7840_port->led_timer1.function = mos7840_led_off;
2406 mos7840_port->led_timer1.expires =
2407 jiffies + msecs_to_jiffies(LED_ON_MS);
2408 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
2409
2410 init_timer(&mos7840_port->led_timer2);
2411 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2412 mos7840_port->led_timer2.expires =
2413 jiffies + msecs_to_jiffies(LED_OFF_MS);
2414 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
2415
2416 mos7840_port->led_flag = false;
2417
2418 /* Turn off LED */
2419 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2420 }
2421 out:
2422 if (pnum == serial->num_ports - 1) {
2423 /* Zero Length flag enable */
2424 Data = 0x0f;
2425 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2426 if (status < 0) {
2427 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2428 goto error;
2429 } else
2430 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2431
2432 /* setting configuration feature to one */
2433 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2434 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2435 MOS_WDR_TIMEOUT);
2436 }
2437 return 0;
2438 error:
2439 kfree(mos7840_port->dr);
2440 kfree(mos7840_port->ctrl_buf);
2441 usb_free_urb(mos7840_port->control_urb);
2442 kfree(mos7840_port);
2443
2444 return status;
2445 }
2446
2447 static int mos7840_port_remove(struct usb_serial_port *port)
2448 {
2449 struct moschip_port *mos7840_port;
2450
2451 mos7840_port = mos7840_get_port_private(port);
2452
2453 if (mos7840_port->has_led) {
2454 /* Turn off LED */
2455 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2456
2457 del_timer_sync(&mos7840_port->led_timer1);
2458 del_timer_sync(&mos7840_port->led_timer2);
2459 }
2460 usb_kill_urb(mos7840_port->control_urb);
2461 usb_free_urb(mos7840_port->control_urb);
2462 kfree(mos7840_port->ctrl_buf);
2463 kfree(mos7840_port->dr);
2464 kfree(mos7840_port);
2465
2466 return 0;
2467 }
2468
2469 static struct usb_serial_driver moschip7840_4port_device = {
2470 .driver = {
2471 .owner = THIS_MODULE,
2472 .name = "mos7840",
2473 },
2474 .description = DRIVER_DESC,
2475 .id_table = id_table,
2476 .num_ports = 4,
2477 .open = mos7840_open,
2478 .close = mos7840_close,
2479 .write = mos7840_write,
2480 .write_room = mos7840_write_room,
2481 .chars_in_buffer = mos7840_chars_in_buffer,
2482 .throttle = mos7840_throttle,
2483 .unthrottle = mos7840_unthrottle,
2484 .calc_num_ports = mos7840_calc_num_ports,
2485 #ifdef MCSSerialProbe
2486 .probe = mos7840_serial_probe,
2487 #endif
2488 .ioctl = mos7840_ioctl,
2489 .set_termios = mos7840_set_termios,
2490 .break_ctl = mos7840_break,
2491 .tiocmget = mos7840_tiocmget,
2492 .tiocmset = mos7840_tiocmset,
2493 .tiocmiwait = usb_serial_generic_tiocmiwait,
2494 .get_icount = usb_serial_generic_get_icount,
2495 .port_probe = mos7840_port_probe,
2496 .port_remove = mos7840_port_remove,
2497 .read_bulk_callback = mos7840_bulk_in_callback,
2498 .read_int_callback = mos7840_interrupt_callback,
2499 };
2500
2501 static struct usb_serial_driver * const serial_drivers[] = {
2502 &moschip7840_4port_device, NULL
2503 };
2504
2505 module_usb_serial_driver(serial_drivers, id_table);
2506
2507 MODULE_DESCRIPTION(DRIVER_DESC);
2508 MODULE_LICENSE("GPL");
CRIS linux kernel tree