1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Clean ups from Moschip version and a few ioctl implementations by:
4 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
5 *
6 * Originally based on drivers/usb/serial/io_edgeport.c which is:
7 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
8 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
9 *
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/errno.h>
14 #include <linux/slab.h>
15 #include <linux/tty.h>
16 #include <linux/tty_driver.h>
17 #include <linux/tty_flip.h>
18 #include <linux/module.h>
19 #include <linux/serial.h>
20 #include <linux/usb.h>
21 #include <linux/usb/serial.h>
22 #include <linux/uaccess.h>
23
24 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
25
26 /*
27 * 16C50 UART register defines
28 */
29
30 #define LCR_BITS_5 0x00 /* 5 bits/char */
31 #define LCR_BITS_6 0x01 /* 6 bits/char */
32 #define LCR_BITS_7 0x02 /* 7 bits/char */
33 #define LCR_BITS_8 0x03 /* 8 bits/char */
34 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
35
36 #define LCR_STOP_1 0x00 /* 1 stop bit */
37 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
38 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
39 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
40
41 #define LCR_PAR_NONE 0x00 /* No parity */
42 #define LCR_PAR_ODD 0x08 /* Odd parity */
43 #define LCR_PAR_EVEN 0x18 /* Even parity */
44 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
45 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
46 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
47
48 #define LCR_SET_BREAK 0x40 /* Set Break condition */
49 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
50
51 #define MCR_DTR 0x01 /* Assert DTR */
52 #define MCR_RTS 0x02 /* Assert RTS */
53 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
54 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
55 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
56 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
57
58 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
59 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
60 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
61 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
62
63 /*
64 * Defines used for sending commands to port
65 */
66
67 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */
68
69 #define MOS_PORT1 0x0200
70 #define MOS_PORT2 0x0300
71 #define MOS_VENREG 0x0000
72 #define MOS_MAX_PORT 0x02
73 #define MOS_WRITE 0x0E
74 #define MOS_READ 0x0D
75
76 /* Requests */
77 #define MCS_RD_RTYPE 0xC0
78 #define MCS_WR_RTYPE 0x40
79 #define MCS_RDREQ 0x0D
80 #define MCS_WRREQ 0x0E
81 #define MCS_CTRL_TIMEOUT 500
82 #define VENDOR_READ_LENGTH (0x01)
83
84 #define MAX_NAME_LEN 64
85
86 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
87 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
88
89 /* For higher baud Rates use TIOCEXBAUD */
90 #define TIOCEXBAUD 0x5462
91
92 /*
93 * Vendor id and device id defines
94 *
95 * NOTE: Do not add new defines, add entries directly to the id_table instead.
96 */
97 #define USB_VENDOR_ID_BANDB 0x0856
98 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
99 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
100 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
101 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
102 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
103 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
104 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
105 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
106 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
107 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
108 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
109 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
110
111 /* Interrupt Routine Defines */
112
113 #define SERIAL_IIR_RLS 0x06
114 #define SERIAL_IIR_MS 0x00
115
116 /*
117 * Emulation of the bit mask on the LINE STATUS REGISTER.
118 */
119 #define SERIAL_LSR_DR 0x0001
120 #define SERIAL_LSR_OE 0x0002
121 #define SERIAL_LSR_PE 0x0004
122 #define SERIAL_LSR_FE 0x0008
123 #define SERIAL_LSR_BI 0x0010
124
125 #define MOS_MSR_DELTA_CTS 0x10
126 #define MOS_MSR_DELTA_DSR 0x20
127 #define MOS_MSR_DELTA_RI 0x40
128 #define MOS_MSR_DELTA_CD 0x80
129
130 /* Serial Port register Address */
131 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
132 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
133 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
134 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
135 #define LINE_STATUS_REGISTER ((__u16)(0x05))
136 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
137 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
138 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
139 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
140
141 #define CLK_MULTI_REGISTER ((__u16)(0x02))
142 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
143 #define GPIO_REGISTER ((__u16)(0x07))
144
145 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
146
147 /*
148 * URB POOL related defines
149 */
150 #define NUM_URBS 16 /* URB Count */
151 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
152
153 /* LED on/off milliseconds*/
154 #define LED_ON_MS 500
155 #define LED_OFF_MS 500
156
157 enum mos7840_flag {
158 MOS7840_FLAG_LED_BUSY,
159 };
160
161 #define MCS_PORT_MASK GENMASK(2, 0)
162 #define MCS_PORTS(nr) ((nr) & MCS_PORT_MASK)
163 #define MCS_LED BIT(3)
164
165 #define MCS_DEVICE(vid, pid, flags) \
166 USB_DEVICE((vid), (pid)), .driver_info = (flags)
167
168 static const struct usb_device_id id_table[] = {
169 { MCS_DEVICE(0x0557, 0x2011, MCS_PORTS(4)) }, /* ATEN UC2324 */
170 { MCS_DEVICE(0x0557, 0x7820, MCS_PORTS(2)) }, /* ATEN UC2322 */
171 { MCS_DEVICE(0x110a, 0x2210, MCS_PORTS(2)) }, /* Moxa UPort 2210 */
172 { MCS_DEVICE(0x9710, 0x7810, MCS_PORTS(1) | MCS_LED) }, /* ASIX MCS7810 */
173 { MCS_DEVICE(0x9710, 0x7820, MCS_PORTS(2)) }, /* MosChip MCS7820 */
174 { MCS_DEVICE(0x9710, 0x7840, MCS_PORTS(4)) }, /* MosChip MCS7840 */
175 { MCS_DEVICE(0x9710, 0x7843, MCS_PORTS(3)) }, /* ASIX MCS7840 3 port */
176 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2) },
177 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P) },
178 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4) },
179 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P) },
180 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2) },
181 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4) },
182 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2) },
183 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4) },
184 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2) },
185 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P) },
186 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4) },
187 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P) },
188 {} /* terminating entry */
189 };
190 MODULE_DEVICE_TABLE(usb, id_table);
191
192 /* This structure holds all of the local port information */
193
194 struct moschip_port {
195 int port_num; /*Actual port number in the device(1,2,etc) */
196 struct urb *read_urb; /* read URB for this port */
197 __u8 shadowLCR; /* last LCR value received */
198 __u8 shadowMCR; /* last MCR value received */
199 struct usb_serial_port *port; /* loop back to the owner of this object */
200
201 /* Offsets */
202 __u8 SpRegOffset;
203 __u8 ControlRegOffset;
204 __u8 DcrRegOffset;
205
206 spinlock_t pool_lock;
207 struct urb *write_urb_pool[NUM_URBS];
208 char busy[NUM_URBS];
209 bool read_urb_busy;
210
211 /* For device(s) with LED indicator */
212 bool has_led;
213 struct timer_list led_timer1; /* Timer for LED on */
214 struct timer_list led_timer2; /* Timer for LED off */
215 struct urb *led_urb;
216 struct usb_ctrlrequest *led_dr;
217
218 unsigned long flags;
219 };
220
221 /*
222 * mos7840_set_reg_sync
223 * To set the Control register by calling usb_fill_control_urb function
224 * by passing usb_sndctrlpipe function as parameter.
225 */
226
mos7840_set_reg_sync(struct usb_serial_port * port,__u16 reg,__u16 val)227 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
228 __u16 val)
229 {
230 struct usb_device *dev = port->serial->dev;
231 val = val & 0x00ff;
232 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
233
234 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
235 MCS_WR_RTYPE, val, reg, NULL, 0,
236 MOS_WDR_TIMEOUT);
237 }
238
239 /*
240 * mos7840_get_reg_sync
241 * To set the Uart register by calling usb_fill_control_urb function by
242 * passing usb_rcvctrlpipe function as parameter.
243 */
244
mos7840_get_reg_sync(struct usb_serial_port * port,__u16 reg,__u16 * val)245 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
246 __u16 *val)
247 {
248 struct usb_device *dev = port->serial->dev;
249 int ret = 0;
250 u8 *buf;
251
252 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
253 if (!buf)
254 return -ENOMEM;
255
256 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
257 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
258 MOS_WDR_TIMEOUT);
259 if (ret < VENDOR_READ_LENGTH) {
260 if (ret >= 0)
261 ret = -EIO;
262 goto out;
263 }
264
265 *val = buf[0];
266 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
267 out:
268 kfree(buf);
269 return ret;
270 }
271
272 /*
273 * mos7840_set_uart_reg
274 * To set the Uart register by calling usb_fill_control_urb function by
275 * passing usb_sndctrlpipe function as parameter.
276 */
277
mos7840_set_uart_reg(struct usb_serial_port * port,__u16 reg,__u16 val)278 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
279 __u16 val)
280 {
281
282 struct usb_device *dev = port->serial->dev;
283 val = val & 0x00ff;
284 /* For the UART control registers, the application number need
285 to be Or'ed */
286 if (port->serial->num_ports == 2 && port->port_number != 0)
287 val |= ((__u16)port->port_number + 2) << 8;
288 else
289 val |= ((__u16)port->port_number + 1) << 8;
290 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
291 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
292 MCS_WR_RTYPE, val, reg, NULL, 0,
293 MOS_WDR_TIMEOUT);
294
295 }
296
297 /*
298 * mos7840_get_uart_reg
299 * To set the Control register by calling usb_fill_control_urb function
300 * by passing usb_rcvctrlpipe function as parameter.
301 */
mos7840_get_uart_reg(struct usb_serial_port * port,__u16 reg,__u16 * val)302 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
303 __u16 *val)
304 {
305 struct usb_device *dev = port->serial->dev;
306 int ret = 0;
307 __u16 Wval;
308 u8 *buf;
309
310 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
311 if (!buf)
312 return -ENOMEM;
313
314 /* Wval is same as application number */
315 if (port->serial->num_ports == 2 && port->port_number != 0)
316 Wval = ((__u16)port->port_number + 2) << 8;
317 else
318 Wval = ((__u16)port->port_number + 1) << 8;
319 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
320 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
321 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
322 MOS_WDR_TIMEOUT);
323 if (ret < VENDOR_READ_LENGTH) {
324 if (ret >= 0)
325 ret = -EIO;
326 goto out;
327 }
328 *val = buf[0];
329 out:
330 kfree(buf);
331 return ret;
332 }
333
mos7840_dump_serial_port(struct usb_serial_port * port,struct moschip_port * mos7840_port)334 static void mos7840_dump_serial_port(struct usb_serial_port *port,
335 struct moschip_port *mos7840_port)
336 {
337
338 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
339 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
340 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
341
342 }
343
344 /************************************************************************/
345 /************************************************************************/
346 /* U S B C A L L B A C K F U N C T I O N S */
347 /* U S B C A L L B A C K F U N C T I O N S */
348 /************************************************************************/
349 /************************************************************************/
350
mos7840_set_led_callback(struct urb * urb)351 static void mos7840_set_led_callback(struct urb *urb)
352 {
353 switch (urb->status) {
354 case 0:
355 /* Success */
356 break;
357 case -ECONNRESET:
358 case -ENOENT:
359 case -ESHUTDOWN:
360 /* This urb is terminated, clean up */
361 dev_dbg(&urb->dev->dev, "%s - urb shutting down: %d\n",
362 __func__, urb->status);
363 break;
364 default:
365 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n",
366 __func__, urb->status);
367 }
368 }
369
mos7840_set_led_async(struct moschip_port * mcs,__u16 wval,__u16 reg)370 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
371 __u16 reg)
372 {
373 struct usb_device *dev = mcs->port->serial->dev;
374 struct usb_ctrlrequest *dr = mcs->led_dr;
375
376 dr->bRequestType = MCS_WR_RTYPE;
377 dr->bRequest = MCS_WRREQ;
378 dr->wValue = cpu_to_le16(wval);
379 dr->wIndex = cpu_to_le16(reg);
380 dr->wLength = cpu_to_le16(0);
381
382 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0),
383 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
384
385 usb_submit_urb(mcs->led_urb, GFP_ATOMIC);
386 }
387
mos7840_set_led_sync(struct usb_serial_port * port,__u16 reg,__u16 val)388 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
389 __u16 val)
390 {
391 struct usb_device *dev = port->serial->dev;
392
393 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
394 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
395 }
396
mos7840_led_off(struct timer_list * t)397 static void mos7840_led_off(struct timer_list *t)
398 {
399 struct moschip_port *mcs = from_timer(mcs, t, led_timer1);
400
401 /* Turn off LED */
402 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
403 mod_timer(&mcs->led_timer2,
404 jiffies + msecs_to_jiffies(LED_OFF_MS));
405 }
406
mos7840_led_flag_off(struct timer_list * t)407 static void mos7840_led_flag_off(struct timer_list *t)
408 {
409 struct moschip_port *mcs = from_timer(mcs, t, led_timer2);
410
411 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags);
412 }
413
mos7840_led_activity(struct usb_serial_port * port)414 static void mos7840_led_activity(struct usb_serial_port *port)
415 {
416 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
417
418 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags))
419 return;
420
421 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER);
422 mod_timer(&mos7840_port->led_timer1,
423 jiffies + msecs_to_jiffies(LED_ON_MS));
424 }
425
426 /*****************************************************************************
427 * mos7840_bulk_in_callback
428 * this is the callback function for when we have received data on the
429 * bulk in endpoint.
430 *****************************************************************************/
431
mos7840_bulk_in_callback(struct urb * urb)432 static void mos7840_bulk_in_callback(struct urb *urb)
433 {
434 struct moschip_port *mos7840_port = urb->context;
435 struct usb_serial_port *port = mos7840_port->port;
436 int retval;
437 unsigned char *data;
438 int status = urb->status;
439
440 if (status) {
441 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
442 mos7840_port->read_urb_busy = false;
443 return;
444 }
445
446 data = urb->transfer_buffer;
447 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
448
449 if (urb->actual_length) {
450 struct tty_port *tport = &mos7840_port->port->port;
451 tty_insert_flip_string(tport, data, urb->actual_length);
452 tty_flip_buffer_push(tport);
453 port->icount.rx += urb->actual_length;
454 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx);
455 }
456
457 if (mos7840_port->has_led)
458 mos7840_led_activity(port);
459
460 mos7840_port->read_urb_busy = true;
461 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
462
463 if (retval) {
464 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
465 mos7840_port->read_urb_busy = false;
466 }
467 }
468
469 /*****************************************************************************
470 * mos7840_bulk_out_data_callback
471 * this is the callback function for when we have finished sending
472 * serial data on the bulk out endpoint.
473 *****************************************************************************/
474
mos7840_bulk_out_data_callback(struct urb * urb)475 static void mos7840_bulk_out_data_callback(struct urb *urb)
476 {
477 struct moschip_port *mos7840_port = urb->context;
478 struct usb_serial_port *port = mos7840_port->port;
479 int status = urb->status;
480 unsigned long flags;
481 int i;
482
483 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
484 for (i = 0; i < NUM_URBS; i++) {
485 if (urb == mos7840_port->write_urb_pool[i]) {
486 mos7840_port->busy[i] = 0;
487 break;
488 }
489 }
490 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
491
492 if (status) {
493 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
494 return;
495 }
496
497 tty_port_tty_wakeup(&port->port);
498
499 }
500
501 /************************************************************************/
502 /* 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 */
503 /************************************************************************/
504
505 /*****************************************************************************
506 * mos7840_open
507 * this function is called by the tty driver when a port is opened
508 * If successful, we return 0
509 * Otherwise we return a negative error number.
510 *****************************************************************************/
511
mos7840_open(struct tty_struct * tty,struct usb_serial_port * port)512 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
513 {
514 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
515 struct usb_serial *serial = port->serial;
516 int response;
517 int j;
518 struct urb *urb;
519 __u16 Data;
520 int status;
521
522 usb_clear_halt(serial->dev, port->write_urb->pipe);
523 usb_clear_halt(serial->dev, port->read_urb->pipe);
524
525 /* Initialising the write urb pool */
526 for (j = 0; j < NUM_URBS; ++j) {
527 urb = usb_alloc_urb(0, GFP_KERNEL);
528 mos7840_port->write_urb_pool[j] = urb;
529 if (!urb)
530 continue;
531
532 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
533 GFP_KERNEL);
534 if (!urb->transfer_buffer) {
535 usb_free_urb(urb);
536 mos7840_port->write_urb_pool[j] = NULL;
537 continue;
538 }
539 }
540
541 /*****************************************************************************
542 * Initialize MCS7840 -- Write Init values to corresponding Registers
543 *
544 * Register Index
545 * 1 : IER
546 * 2 : FCR
547 * 3 : LCR
548 * 4 : MCR
549 *
550 * 0x08 : SP1/2 Control Reg
551 *****************************************************************************/
552
553 /* NEED to check the following Block */
554
555 Data = 0x0;
556 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
557 if (status < 0) {
558 dev_dbg(&port->dev, "Reading Spreg failed\n");
559 goto err;
560 }
561 Data |= 0x80;
562 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
563 if (status < 0) {
564 dev_dbg(&port->dev, "writing Spreg failed\n");
565 goto err;
566 }
567
568 Data &= ~0x80;
569 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
570 if (status < 0) {
571 dev_dbg(&port->dev, "writing Spreg failed\n");
572 goto err;
573 }
574 /* End of block to be checked */
575
576 Data = 0x0;
577 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
578 &Data);
579 if (status < 0) {
580 dev_dbg(&port->dev, "Reading Controlreg failed\n");
581 goto err;
582 }
583 Data |= 0x08; /* Driver done bit */
584 Data |= 0x20; /* rx_disable */
585 status = mos7840_set_reg_sync(port,
586 mos7840_port->ControlRegOffset, Data);
587 if (status < 0) {
588 dev_dbg(&port->dev, "writing Controlreg failed\n");
589 goto err;
590 }
591 /* do register settings here */
592 /* Set all regs to the device default values. */
593 /***********************************
594 * First Disable all interrupts.
595 ***********************************/
596 Data = 0x00;
597 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
598 if (status < 0) {
599 dev_dbg(&port->dev, "disabling interrupts failed\n");
600 goto err;
601 }
602 /* Set FIFO_CONTROL_REGISTER to the default value */
603 Data = 0x00;
604 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
605 if (status < 0) {
606 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
607 goto err;
608 }
609
610 Data = 0xcf;
611 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
612 if (status < 0) {
613 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
614 goto err;
615 }
616
617 Data = 0x03;
618 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
619 mos7840_port->shadowLCR = Data;
620
621 Data = 0x0b;
622 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
623 mos7840_port->shadowMCR = Data;
624
625 Data = 0x00;
626 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
627 mos7840_port->shadowLCR = Data;
628
629 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
630 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
631
632 Data = 0x0c;
633 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
634
635 Data = 0x0;
636 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
637
638 Data = 0x00;
639 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
640
641 Data = Data & ~SERIAL_LCR_DLAB;
642 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
643 mos7840_port->shadowLCR = Data;
644
645 /* clearing Bulkin and Bulkout Fifo */
646 Data = 0x0;
647 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
648
649 Data = Data | 0x0c;
650 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
651
652 Data = Data & ~0x0c;
653 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
654 /* Finally enable all interrupts */
655 Data = 0x0c;
656 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
657
658 /* clearing rx_disable */
659 Data = 0x0;
660 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
661 &Data);
662 Data = Data & ~0x20;
663 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
664 Data);
665
666 /* rx_negate */
667 Data = 0x0;
668 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
669 &Data);
670 Data = Data | 0x10;
671 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
672 Data);
673
674 dev_dbg(&port->dev, "port number is %d\n", port->port_number);
675 dev_dbg(&port->dev, "minor number is %d\n", port->minor);
676 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
677 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
678 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
679 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
680 mos7840_port->read_urb = port->read_urb;
681
682 /* set up our bulk in urb */
683 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
684 usb_fill_bulk_urb(mos7840_port->read_urb,
685 serial->dev,
686 usb_rcvbulkpipe(serial->dev,
687 (port->bulk_in_endpointAddress) + 2),
688 port->bulk_in_buffer,
689 mos7840_port->read_urb->transfer_buffer_length,
690 mos7840_bulk_in_callback, mos7840_port);
691 } else {
692 usb_fill_bulk_urb(mos7840_port->read_urb,
693 serial->dev,
694 usb_rcvbulkpipe(serial->dev,
695 port->bulk_in_endpointAddress),
696 port->bulk_in_buffer,
697 mos7840_port->read_urb->transfer_buffer_length,
698 mos7840_bulk_in_callback, mos7840_port);
699 }
700
701 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
702 mos7840_port->read_urb_busy = true;
703 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
704 if (response) {
705 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
706 __func__, response);
707 mos7840_port->read_urb_busy = false;
708 }
709
710 /* initialize our port settings */
711 /* Must set to enable ints! */
712 mos7840_port->shadowMCR = MCR_MASTER_IE;
713
714 return 0;
715 err:
716 for (j = 0; j < NUM_URBS; ++j) {
717 urb = mos7840_port->write_urb_pool[j];
718 if (!urb)
719 continue;
720 kfree(urb->transfer_buffer);
721 usb_free_urb(urb);
722 }
723 return status;
724 }
725
726 /*****************************************************************************
727 * mos7840_chars_in_buffer
728 * this function is called by the tty driver when it wants to know how many
729 * bytes of data we currently have outstanding in the port (data that has
730 * been written, but hasn't made it out the port yet)
731 *****************************************************************************/
732
mos7840_chars_in_buffer(struct tty_struct * tty)733 static unsigned int mos7840_chars_in_buffer(struct tty_struct *tty)
734 {
735 struct usb_serial_port *port = tty->driver_data;
736 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
737 int i;
738 unsigned int chars = 0;
739 unsigned long flags;
740
741 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
742 for (i = 0; i < NUM_URBS; ++i) {
743 if (mos7840_port->busy[i]) {
744 struct urb *urb = mos7840_port->write_urb_pool[i];
745 chars += urb->transfer_buffer_length;
746 }
747 }
748 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
749 dev_dbg(&port->dev, "%s - returns %u\n", __func__, chars);
750 return chars;
751
752 }
753
754 /*****************************************************************************
755 * mos7840_close
756 * this function is called by the tty driver when a port is closed
757 *****************************************************************************/
758
mos7840_close(struct usb_serial_port * port)759 static void mos7840_close(struct usb_serial_port *port)
760 {
761 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
762 int j;
763 __u16 Data;
764
765 for (j = 0; j < NUM_URBS; ++j)
766 usb_kill_urb(mos7840_port->write_urb_pool[j]);
767
768 /* Freeing Write URBs */
769 for (j = 0; j < NUM_URBS; ++j) {
770 if (mos7840_port->write_urb_pool[j]) {
771 kfree(mos7840_port->write_urb_pool[j]->transfer_buffer);
772 usb_free_urb(mos7840_port->write_urb_pool[j]);
773 }
774 }
775
776 usb_kill_urb(mos7840_port->read_urb);
777 mos7840_port->read_urb_busy = false;
778
779 Data = 0x0;
780 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
781
782 Data = 0x00;
783 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
784 }
785
786 /*****************************************************************************
787 * mos7840_break
788 * this function sends a break to the port
789 *****************************************************************************/
mos7840_break(struct tty_struct * tty,int break_state)790 static void mos7840_break(struct tty_struct *tty, int break_state)
791 {
792 struct usb_serial_port *port = tty->driver_data;
793 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
794 unsigned char data;
795
796 if (break_state == -1)
797 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
798 else
799 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
800
801 /* FIXME: no locking on shadowLCR anywhere in driver */
802 mos7840_port->shadowLCR = data;
803 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
804 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
805 mos7840_port->shadowLCR);
806 }
807
808 /*****************************************************************************
809 * mos7840_write_room
810 * this function is called by the tty driver when it wants to know how many
811 * bytes of data we can accept for a specific port.
812 *****************************************************************************/
813
mos7840_write_room(struct tty_struct * tty)814 static unsigned int mos7840_write_room(struct tty_struct *tty)
815 {
816 struct usb_serial_port *port = tty->driver_data;
817 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
818 int i;
819 unsigned int room = 0;
820 unsigned long flags;
821
822 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
823 for (i = 0; i < NUM_URBS; ++i) {
824 if (!mos7840_port->busy[i])
825 room += URB_TRANSFER_BUFFER_SIZE;
826 }
827 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
828
829 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
830 dev_dbg(&mos7840_port->port->dev, "%s - returns %u\n", __func__, room);
831 return room;
832
833 }
834
835 /*****************************************************************************
836 * mos7840_write
837 * this function is called by the tty driver when data should be written to
838 * the port.
839 * If successful, we return the number of bytes written, otherwise we
840 * return a negative error number.
841 *****************************************************************************/
842
mos7840_write(struct tty_struct * tty,struct usb_serial_port * port,const unsigned char * data,int count)843 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
844 const unsigned char *data, int count)
845 {
846 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
847 struct usb_serial *serial = port->serial;
848 int status;
849 int i;
850 int bytes_sent = 0;
851 int transfer_size;
852 unsigned long flags;
853 struct urb *urb;
854 /* __u16 Data; */
855 const unsigned char *current_position = data;
856
857 /* try to find a free urb in the list */
858 urb = NULL;
859
860 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
861 for (i = 0; i < NUM_URBS; ++i) {
862 if (!mos7840_port->busy[i]) {
863 mos7840_port->busy[i] = 1;
864 urb = mos7840_port->write_urb_pool[i];
865 dev_dbg(&port->dev, "URB:%d\n", i);
866 break;
867 }
868 }
869 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
870
871 if (urb == NULL) {
872 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
873 goto exit;
874 }
875
876 if (urb->transfer_buffer == NULL) {
877 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
878 GFP_ATOMIC);
879 if (!urb->transfer_buffer) {
880 bytes_sent = -ENOMEM;
881 goto exit;
882 }
883 }
884 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
885
886 memcpy(urb->transfer_buffer, current_position, transfer_size);
887
888 /* fill urb with data and submit */
889 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
890 usb_fill_bulk_urb(urb,
891 serial->dev,
892 usb_sndbulkpipe(serial->dev,
893 (port->bulk_out_endpointAddress) + 2),
894 urb->transfer_buffer,
895 transfer_size,
896 mos7840_bulk_out_data_callback, mos7840_port);
897 } else {
898 usb_fill_bulk_urb(urb,
899 serial->dev,
900 usb_sndbulkpipe(serial->dev,
901 port->bulk_out_endpointAddress),
902 urb->transfer_buffer,
903 transfer_size,
904 mos7840_bulk_out_data_callback, mos7840_port);
905 }
906
907 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
908
909 if (mos7840_port->has_led)
910 mos7840_led_activity(port);
911
912 /* send it down the pipe */
913 status = usb_submit_urb(urb, GFP_ATOMIC);
914
915 if (status) {
916 mos7840_port->busy[i] = 0;
917 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
918 "with status = %d\n", __func__, status);
919 bytes_sent = status;
920 goto exit;
921 }
922 bytes_sent = transfer_size;
923 port->icount.tx += transfer_size;
924 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx);
925 exit:
926 return bytes_sent;
927
928 }
929
930 /*****************************************************************************
931 * mos7840_throttle
932 * this function is called by the tty driver when it wants to stop the data
933 * being read from the port.
934 *****************************************************************************/
935
mos7840_throttle(struct tty_struct * tty)936 static void mos7840_throttle(struct tty_struct *tty)
937 {
938 struct usb_serial_port *port = tty->driver_data;
939 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
940 int status;
941
942 /* if we are implementing XON/XOFF, send the stop character */
943 if (I_IXOFF(tty)) {
944 unsigned char stop_char = STOP_CHAR(tty);
945 status = mos7840_write(tty, port, &stop_char, 1);
946 if (status <= 0)
947 return;
948 }
949 /* if we are implementing RTS/CTS, toggle that line */
950 if (C_CRTSCTS(tty)) {
951 mos7840_port->shadowMCR &= ~MCR_RTS;
952 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
953 mos7840_port->shadowMCR);
954 if (status < 0)
955 return;
956 }
957 }
958
959 /*****************************************************************************
960 * mos7840_unthrottle
961 * this function is called by the tty driver when it wants to resume
962 * the data being read from the port (called after mos7840_throttle is
963 * called)
964 *****************************************************************************/
mos7840_unthrottle(struct tty_struct * tty)965 static void mos7840_unthrottle(struct tty_struct *tty)
966 {
967 struct usb_serial_port *port = tty->driver_data;
968 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
969 int status;
970
971 /* if we are implementing XON/XOFF, send the start character */
972 if (I_IXOFF(tty)) {
973 unsigned char start_char = START_CHAR(tty);
974 status = mos7840_write(tty, port, &start_char, 1);
975 if (status <= 0)
976 return;
977 }
978
979 /* if we are implementing RTS/CTS, toggle that line */
980 if (C_CRTSCTS(tty)) {
981 mos7840_port->shadowMCR |= MCR_RTS;
982 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
983 mos7840_port->shadowMCR);
984 if (status < 0)
985 return;
986 }
987 }
988
mos7840_tiocmget(struct tty_struct * tty)989 static int mos7840_tiocmget(struct tty_struct *tty)
990 {
991 struct usb_serial_port *port = tty->driver_data;
992 unsigned int result;
993 __u16 msr;
994 __u16 mcr;
995 int status;
996
997 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
998 if (status < 0)
999 return -EIO;
1000 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1001 if (status < 0)
1002 return -EIO;
1003 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1004 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1005 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1006 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1007 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1008 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1009 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1010
1011 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1012
1013 return result;
1014 }
1015
mos7840_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)1016 static int mos7840_tiocmset(struct tty_struct *tty,
1017 unsigned int set, unsigned int clear)
1018 {
1019 struct usb_serial_port *port = tty->driver_data;
1020 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
1021 unsigned int mcr;
1022 int status;
1023
1024 /* FIXME: What locks the port registers ? */
1025 mcr = mos7840_port->shadowMCR;
1026 if (clear & TIOCM_RTS)
1027 mcr &= ~MCR_RTS;
1028 if (clear & TIOCM_DTR)
1029 mcr &= ~MCR_DTR;
1030 if (clear & TIOCM_LOOP)
1031 mcr &= ~MCR_LOOPBACK;
1032
1033 if (set & TIOCM_RTS)
1034 mcr |= MCR_RTS;
1035 if (set & TIOCM_DTR)
1036 mcr |= MCR_DTR;
1037 if (set & TIOCM_LOOP)
1038 mcr |= MCR_LOOPBACK;
1039
1040 mos7840_port->shadowMCR = mcr;
1041
1042 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1043 if (status < 0) {
1044 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1045 return status;
1046 }
1047
1048 return 0;
1049 }
1050
1051 /*****************************************************************************
1052 * mos7840_calc_baud_rate_divisor
1053 * this function calculates the proper baud rate divisor for the specified
1054 * baud rate.
1055 *****************************************************************************/
mos7840_calc_baud_rate_divisor(struct usb_serial_port * port,int baudRate,int * divisor,__u16 * clk_sel_val)1056 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1057 int baudRate, int *divisor,
1058 __u16 *clk_sel_val)
1059 {
1060 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1061
1062 if (baudRate <= 115200) {
1063 *divisor = 115200 / baudRate;
1064 *clk_sel_val = 0x0;
1065 }
1066 if ((baudRate > 115200) && (baudRate <= 230400)) {
1067 *divisor = 230400 / baudRate;
1068 *clk_sel_val = 0x10;
1069 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1070 *divisor = 403200 / baudRate;
1071 *clk_sel_val = 0x20;
1072 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1073 *divisor = 460800 / baudRate;
1074 *clk_sel_val = 0x30;
1075 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1076 *divisor = 806400 / baudRate;
1077 *clk_sel_val = 0x40;
1078 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1079 *divisor = 921600 / baudRate;
1080 *clk_sel_val = 0x50;
1081 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1082 *divisor = 1572864 / baudRate;
1083 *clk_sel_val = 0x60;
1084 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1085 *divisor = 3145728 / baudRate;
1086 *clk_sel_val = 0x70;
1087 }
1088 return 0;
1089 }
1090
1091 /*****************************************************************************
1092 * mos7840_send_cmd_write_baud_rate
1093 * this function sends the proper command to change the baud rate of the
1094 * specified port.
1095 *****************************************************************************/
1096
mos7840_send_cmd_write_baud_rate(struct moschip_port * mos7840_port,int baudRate)1097 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1098 int baudRate)
1099 {
1100 struct usb_serial_port *port = mos7840_port->port;
1101 int divisor = 0;
1102 int status;
1103 __u16 Data;
1104 __u16 clk_sel_val;
1105
1106 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate);
1107 /* reset clk_uart_sel in spregOffset */
1108 if (baudRate > 115200) {
1109 #ifdef HW_flow_control
1110 /* NOTE: need to see the pther register to modify */
1111 /* setting h/w flow control bit to 1 */
1112 Data = 0x2b;
1113 mos7840_port->shadowMCR = Data;
1114 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1115 Data);
1116 if (status < 0) {
1117 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1118 return -1;
1119 }
1120 #endif
1121
1122 } else {
1123 #ifdef HW_flow_control
1124 /* setting h/w flow control bit to 0 */
1125 Data = 0xb;
1126 mos7840_port->shadowMCR = Data;
1127 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1128 Data);
1129 if (status < 0) {
1130 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1131 return -1;
1132 }
1133 #endif
1134
1135 }
1136
1137 if (1) { /* baudRate <= 115200) */
1138 clk_sel_val = 0x0;
1139 Data = 0x0;
1140 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1141 &clk_sel_val);
1142 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1143 &Data);
1144 if (status < 0) {
1145 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1146 return -1;
1147 }
1148 Data = (Data & 0x8f) | clk_sel_val;
1149 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1150 Data);
1151 if (status < 0) {
1152 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1153 return -1;
1154 }
1155 /* Calculate the Divisor */
1156
1157 if (status) {
1158 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1159 return status;
1160 }
1161 /* Enable access to divisor latch */
1162 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1163 mos7840_port->shadowLCR = Data;
1164 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1165
1166 /* Write the divisor */
1167 Data = (unsigned char)(divisor & 0xff);
1168 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1169 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1170
1171 Data = (unsigned char)((divisor & 0xff00) >> 8);
1172 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1173 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1174
1175 /* Disable access to divisor latch */
1176 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1177 mos7840_port->shadowLCR = Data;
1178 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1179
1180 }
1181 return status;
1182 }
1183
1184 /*****************************************************************************
1185 * mos7840_change_port_settings
1186 * This routine is called to set the UART on the device to match
1187 * the specified new settings.
1188 *****************************************************************************/
1189
mos7840_change_port_settings(struct tty_struct * tty,struct moschip_port * mos7840_port,const struct ktermios * old_termios)1190 static void mos7840_change_port_settings(struct tty_struct *tty,
1191 struct moschip_port *mos7840_port,
1192 const struct ktermios *old_termios)
1193 {
1194 struct usb_serial_port *port = mos7840_port->port;
1195 int baud;
1196 unsigned cflag;
1197 __u8 lData;
1198 __u8 lParity;
1199 __u8 lStop;
1200 int status;
1201 __u16 Data;
1202
1203 lData = LCR_BITS_8;
1204 lStop = LCR_STOP_1;
1205 lParity = LCR_PAR_NONE;
1206
1207 cflag = tty->termios.c_cflag;
1208
1209 /* Change the number of bits */
1210 switch (cflag & CSIZE) {
1211 case CS5:
1212 lData = LCR_BITS_5;
1213 break;
1214
1215 case CS6:
1216 lData = LCR_BITS_6;
1217 break;
1218
1219 case CS7:
1220 lData = LCR_BITS_7;
1221 break;
1222
1223 default:
1224 case CS8:
1225 lData = LCR_BITS_8;
1226 break;
1227 }
1228
1229 /* Change the Parity bit */
1230 if (cflag & PARENB) {
1231 if (cflag & PARODD) {
1232 lParity = LCR_PAR_ODD;
1233 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1234 } else {
1235 lParity = LCR_PAR_EVEN;
1236 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1237 }
1238
1239 } else {
1240 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1241 }
1242
1243 if (cflag & CMSPAR)
1244 lParity = lParity | 0x20;
1245
1246 /* Change the Stop bit */
1247 if (cflag & CSTOPB) {
1248 lStop = LCR_STOP_2;
1249 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1250 } else {
1251 lStop = LCR_STOP_1;
1252 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1253 }
1254
1255 /* Update the LCR with the correct value */
1256 mos7840_port->shadowLCR &=
1257 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1258 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1259
1260 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1261 mos7840_port->shadowLCR);
1262 /* Disable Interrupts */
1263 Data = 0x00;
1264 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1265
1266 Data = 0x00;
1267 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1268
1269 Data = 0xcf;
1270 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1271
1272 /* Send the updated LCR value to the mos7840 */
1273 Data = mos7840_port->shadowLCR;
1274
1275 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1276
1277 Data = 0x00b;
1278 mos7840_port->shadowMCR = Data;
1279 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1280 Data = 0x00b;
1281 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1282
1283 /* set up the MCR register and send it to the mos7840 */
1284
1285 mos7840_port->shadowMCR = MCR_MASTER_IE;
1286 if (cflag & CBAUD)
1287 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1288
1289 if (cflag & CRTSCTS)
1290 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1291 else
1292 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1293
1294 Data = mos7840_port->shadowMCR;
1295 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1296
1297 /* Determine divisor based on baud rate */
1298 baud = tty_get_baud_rate(tty);
1299
1300 if (!baud) {
1301 /* pick a default, any default... */
1302 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
1303 baud = 9600;
1304 }
1305
1306 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
1307 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1308
1309 /* Enable Interrupts */
1310 Data = 0x0c;
1311 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1312
1313 if (!mos7840_port->read_urb_busy) {
1314 mos7840_port->read_urb_busy = true;
1315 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1316 if (status) {
1317 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1318 status);
1319 mos7840_port->read_urb_busy = false;
1320 }
1321 }
1322 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1323 mos7840_port->shadowLCR);
1324 }
1325
1326 /*****************************************************************************
1327 * mos7840_set_termios
1328 * this function is called by the tty driver when it wants to change
1329 * the termios structure
1330 *****************************************************************************/
1331
mos7840_set_termios(struct tty_struct * tty,struct usb_serial_port * port,const struct ktermios * old_termios)1332 static void mos7840_set_termios(struct tty_struct *tty,
1333 struct usb_serial_port *port,
1334 const struct ktermios *old_termios)
1335 {
1336 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
1337 int status;
1338
1339 /* change the port settings to the new ones specified */
1340
1341 mos7840_change_port_settings(tty, mos7840_port, old_termios);
1342
1343 if (!mos7840_port->read_urb_busy) {
1344 mos7840_port->read_urb_busy = true;
1345 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1346 if (status) {
1347 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1348 status);
1349 mos7840_port->read_urb_busy = false;
1350 }
1351 }
1352 }
1353
1354 /*****************************************************************************
1355 * mos7840_get_lsr_info - get line status register info
1356 *
1357 * Purpose: Let user call ioctl() to get info when the UART physically
1358 * is emptied. On bus types like RS485, the transmitter must
1359 * release the bus after transmitting. This must be done when
1360 * the transmit shift register is empty, not be done when the
1361 * transmit holding register is empty. This functionality
1362 * allows an RS485 driver to be written in user space.
1363 *****************************************************************************/
1364
mos7840_get_lsr_info(struct tty_struct * tty,unsigned int __user * value)1365 static int mos7840_get_lsr_info(struct tty_struct *tty,
1366 unsigned int __user *value)
1367 {
1368 int count;
1369 unsigned int result = 0;
1370
1371 count = mos7840_chars_in_buffer(tty);
1372 if (count == 0)
1373 result = TIOCSER_TEMT;
1374
1375 if (copy_to_user(value, &result, sizeof(int)))
1376 return -EFAULT;
1377 return 0;
1378 }
1379
1380 /*****************************************************************************
1381 * SerialIoctl
1382 * this function handles any ioctl calls to the driver
1383 *****************************************************************************/
1384
mos7840_ioctl(struct tty_struct * tty,unsigned int cmd,unsigned long arg)1385 static int mos7840_ioctl(struct tty_struct *tty,
1386 unsigned int cmd, unsigned long arg)
1387 {
1388 struct usb_serial_port *port = tty->driver_data;
1389 void __user *argp = (void __user *)arg;
1390
1391 switch (cmd) {
1392 /* return number of bytes available */
1393
1394 case TIOCSERGETLSR:
1395 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1396 return mos7840_get_lsr_info(tty, argp);
1397
1398 default:
1399 break;
1400 }
1401 return -ENOIOCTLCMD;
1402 }
1403
1404 /*
1405 * Check if GPO (pin 42) is connected to GPI (pin 33) as recommended by ASIX
1406 * for MCS7810 by bit-banging a 16-bit word.
1407 *
1408 * Note that GPO is really RTS of the third port so this will toggle RTS of
1409 * port two or three on two- and four-port devices.
1410 */
mos7810_check(struct usb_serial * serial)1411 static int mos7810_check(struct usb_serial *serial)
1412 {
1413 int i, pass_count = 0;
1414 u8 *buf;
1415 __u16 data = 0, mcr_data = 0;
1416 __u16 test_pattern = 0x55AA;
1417 int res;
1418
1419 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
1420 if (!buf)
1421 return 0; /* failed to identify 7810 */
1422
1423 /* Store MCR setting */
1424 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
1425 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
1426 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
1427 if (res == VENDOR_READ_LENGTH)
1428 mcr_data = *buf;
1429
1430 for (i = 0; i < 16; i++) {
1431 /* Send the 1-bit test pattern out to MCS7810 test pin */
1432 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1433 MCS_WRREQ, MCS_WR_RTYPE,
1434 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
1435 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
1436
1437 /* Read the test pattern back */
1438 res = usb_control_msg(serial->dev,
1439 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ,
1440 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
1441 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
1442 if (res == VENDOR_READ_LENGTH)
1443 data = *buf;
1444
1445 /* If this is a MCS7810 device, both test patterns must match */
1446 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
1447 break;
1448
1449 pass_count++;
1450 }
1451
1452 /* Restore MCR setting */
1453 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
1454 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
1455 0, MOS_WDR_TIMEOUT);
1456
1457 kfree(buf);
1458
1459 if (pass_count == 16)
1460 return 1;
1461
1462 return 0;
1463 }
1464
mos7840_probe(struct usb_serial * serial,const struct usb_device_id * id)1465 static int mos7840_probe(struct usb_serial *serial,
1466 const struct usb_device_id *id)
1467 {
1468 unsigned long device_flags = id->driver_info;
1469 u8 *buf;
1470
1471 /* Skip device-type detection if we already have device flags. */
1472 if (device_flags)
1473 goto out;
1474
1475 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
1476 if (!buf)
1477 return -ENOMEM;
1478
1479 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
1480 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
1481 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
1482
1483 /* For a MCS7840 device GPIO0 must be set to 1 */
1484 if (buf[0] & 0x01)
1485 device_flags = MCS_PORTS(4);
1486 else if (mos7810_check(serial))
1487 device_flags = MCS_PORTS(1) | MCS_LED;
1488 else
1489 device_flags = MCS_PORTS(2);
1490
1491 kfree(buf);
1492 out:
1493 usb_set_serial_data(serial, (void *)device_flags);
1494
1495 return 0;
1496 }
1497
mos7840_calc_num_ports(struct usb_serial * serial,struct usb_serial_endpoints * epds)1498 static int mos7840_calc_num_ports(struct usb_serial *serial,
1499 struct usb_serial_endpoints *epds)
1500 {
1501 unsigned long device_flags = (unsigned long)usb_get_serial_data(serial);
1502 int num_ports = MCS_PORTS(device_flags);
1503
1504 if (num_ports == 0 || num_ports > 4)
1505 return -ENODEV;
1506
1507 if (epds->num_bulk_in < num_ports || epds->num_bulk_out < num_ports) {
1508 dev_err(&serial->interface->dev, "missing endpoints\n");
1509 return -ENODEV;
1510 }
1511
1512 return num_ports;
1513 }
1514
mos7840_attach(struct usb_serial * serial)1515 static int mos7840_attach(struct usb_serial *serial)
1516 {
1517 struct device *dev = &serial->interface->dev;
1518 int status;
1519 u16 val;
1520
1521 /* Zero Length flag enable */
1522 val = 0x0f;
1523 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, val);
1524 if (status < 0)
1525 dev_dbg(dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
1526 else
1527 dev_dbg(dev, "ZLP_REG5 Writing success status%d\n", status);
1528
1529 return status;
1530 }
1531
mos7840_port_probe(struct usb_serial_port * port)1532 static int mos7840_port_probe(struct usb_serial_port *port)
1533 {
1534 struct usb_serial *serial = port->serial;
1535 unsigned long device_flags = (unsigned long)usb_get_serial_data(serial);
1536 struct moschip_port *mos7840_port;
1537 int status;
1538 int pnum;
1539 __u16 Data;
1540
1541 /* we set up the pointers to the endpoints in the mos7840_open *
1542 * function, as the structures aren't created yet. */
1543
1544 pnum = port->port_number;
1545
1546 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
1547 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
1548 if (!mos7840_port)
1549 return -ENOMEM;
1550
1551 /* Initialize all port interrupt end point to port 0 int
1552 * endpoint. Our device has only one interrupt end point
1553 * common to all port */
1554
1555 mos7840_port->port = port;
1556 spin_lock_init(&mos7840_port->pool_lock);
1557
1558 /* minor is not initialised until later by
1559 * usb-serial.c:get_free_serial() and cannot therefore be used
1560 * to index device instances */
1561 mos7840_port->port_num = pnum + 1;
1562 dev_dbg(&port->dev, "port->minor = %d\n", port->minor);
1563 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
1564
1565 if (mos7840_port->port_num == 1) {
1566 mos7840_port->SpRegOffset = 0x0;
1567 mos7840_port->ControlRegOffset = 0x1;
1568 mos7840_port->DcrRegOffset = 0x4;
1569 } else {
1570 u8 phy_num = mos7840_port->port_num;
1571
1572 /* Port 2 in the 2-port case uses registers of port 3 */
1573 if (serial->num_ports == 2)
1574 phy_num = 3;
1575
1576 mos7840_port->SpRegOffset = 0x8 + 2 * (phy_num - 2);
1577 mos7840_port->ControlRegOffset = 0x9 + 2 * (phy_num - 2);
1578 mos7840_port->DcrRegOffset = 0x16 + 3 * (phy_num - 2);
1579 }
1580 mos7840_dump_serial_port(port, mos7840_port);
1581 usb_set_serial_port_data(port, mos7840_port);
1582
1583 /* enable rx_disable bit in control register */
1584 status = mos7840_get_reg_sync(port,
1585 mos7840_port->ControlRegOffset, &Data);
1586 if (status < 0) {
1587 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
1588 goto error;
1589 } else
1590 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
1591 Data |= 0x08; /* setting driver done bit */
1592 Data |= 0x04; /* sp1_bit to have cts change reflect in
1593 modem status reg */
1594
1595 /* Data |= 0x20; //rx_disable bit */
1596 status = mos7840_set_reg_sync(port,
1597 mos7840_port->ControlRegOffset, Data);
1598 if (status < 0) {
1599 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
1600 goto error;
1601 } else
1602 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
1603
1604 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
1605 and 0x24 in DCR3 */
1606 Data = 0x01;
1607 status = mos7840_set_reg_sync(port,
1608 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
1609 if (status < 0) {
1610 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
1611 goto error;
1612 } else
1613 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
1614
1615 Data = 0x05;
1616 status = mos7840_set_reg_sync(port,
1617 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
1618 if (status < 0) {
1619 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
1620 goto error;
1621 } else
1622 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
1623
1624 Data = 0x24;
1625 status = mos7840_set_reg_sync(port,
1626 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
1627 if (status < 0) {
1628 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
1629 goto error;
1630 } else
1631 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
1632
1633 /* write values in clkstart0x0 and clkmulti 0x20 */
1634 Data = 0x0;
1635 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
1636 if (status < 0) {
1637 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
1638 goto error;
1639 } else
1640 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
1641
1642 Data = 0x20;
1643 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
1644 if (status < 0) {
1645 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
1646 goto error;
1647 } else
1648 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
1649
1650 /* write value 0x0 to scratchpad register */
1651 Data = 0x00;
1652 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
1653 if (status < 0) {
1654 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
1655 goto error;
1656 } else
1657 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
1658
1659 /* Zero Length flag register */
1660 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
1661 Data = 0xff;
1662 status = mos7840_set_reg_sync(port,
1663 (__u16) (ZLP_REG1 +
1664 ((__u16)mos7840_port->port_num)), Data);
1665 dev_dbg(&port->dev, "ZLIP offset %x\n",
1666 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
1667 if (status < 0) {
1668 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
1669 goto error;
1670 } else
1671 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
1672 } else {
1673 Data = 0xff;
1674 status = mos7840_set_reg_sync(port,
1675 (__u16) (ZLP_REG1 +
1676 ((__u16)mos7840_port->port_num) - 0x1), Data);
1677 dev_dbg(&port->dev, "ZLIP offset %x\n",
1678 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
1679 if (status < 0) {
1680 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
1681 goto error;
1682 } else
1683 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
1684
1685 }
1686
1687 mos7840_port->has_led = device_flags & MCS_LED;
1688
1689 /* Initialize LED timers */
1690 if (mos7840_port->has_led) {
1691 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL);
1692 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr),
1693 GFP_KERNEL);
1694 if (!mos7840_port->led_urb || !mos7840_port->led_dr) {
1695 status = -ENOMEM;
1696 goto error;
1697 }
1698
1699 timer_setup(&mos7840_port->led_timer1, mos7840_led_off, 0);
1700 mos7840_port->led_timer1.expires =
1701 jiffies + msecs_to_jiffies(LED_ON_MS);
1702 timer_setup(&mos7840_port->led_timer2, mos7840_led_flag_off,
1703 0);
1704 mos7840_port->led_timer2.expires =
1705 jiffies + msecs_to_jiffies(LED_OFF_MS);
1706
1707 /* Turn off LED */
1708 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
1709 }
1710
1711 return 0;
1712 error:
1713 kfree(mos7840_port->led_dr);
1714 usb_free_urb(mos7840_port->led_urb);
1715 kfree(mos7840_port);
1716
1717 return status;
1718 }
1719
mos7840_port_remove(struct usb_serial_port * port)1720 static void mos7840_port_remove(struct usb_serial_port *port)
1721 {
1722 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
1723
1724 if (mos7840_port->has_led) {
1725 /* Turn off LED */
1726 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
1727
1728 del_timer_sync(&mos7840_port->led_timer1);
1729 del_timer_sync(&mos7840_port->led_timer2);
1730
1731 usb_kill_urb(mos7840_port->led_urb);
1732 usb_free_urb(mos7840_port->led_urb);
1733 kfree(mos7840_port->led_dr);
1734 }
1735
1736 kfree(mos7840_port);
1737 }
1738
1739 static struct usb_serial_driver moschip7840_4port_device = {
1740 .driver = {
1741 .owner = THIS_MODULE,
1742 .name = "mos7840",
1743 },
1744 .description = DRIVER_DESC,
1745 .id_table = id_table,
1746 .num_interrupt_in = 1,
1747 .open = mos7840_open,
1748 .close = mos7840_close,
1749 .write = mos7840_write,
1750 .write_room = mos7840_write_room,
1751 .chars_in_buffer = mos7840_chars_in_buffer,
1752 .throttle = mos7840_throttle,
1753 .unthrottle = mos7840_unthrottle,
1754 .calc_num_ports = mos7840_calc_num_ports,
1755 .probe = mos7840_probe,
1756 .attach = mos7840_attach,
1757 .ioctl = mos7840_ioctl,
1758 .set_termios = mos7840_set_termios,
1759 .break_ctl = mos7840_break,
1760 .tiocmget = mos7840_tiocmget,
1761 .tiocmset = mos7840_tiocmset,
1762 .get_icount = usb_serial_generic_get_icount,
1763 .port_probe = mos7840_port_probe,
1764 .port_remove = mos7840_port_remove,
1765 .read_bulk_callback = mos7840_bulk_in_callback,
1766 };
1767
1768 static struct usb_serial_driver * const serial_drivers[] = {
1769 &moschip7840_4port_device, NULL
1770 };
1771
1772 module_usb_serial_driver(serial_drivers, id_table);
1773
1774 MODULE_DESCRIPTION(DRIVER_DESC);
1775 MODULE_LICENSE("GPL");
1776