?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / usb / serial / mos7840.c
blobca3da79afd23f921dc1ea54345a27cc18d3794d1
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
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
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
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 */
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
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
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
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
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
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
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
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
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
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
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
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
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 *****************************************************************************/
790 static int 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
805 return mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
806 mos7840_port->shadowLCR);
807 }
808
809 /*****************************************************************************
810 * mos7840_write_room
811 * this function is called by the tty driver when it wants to know how many
812 * bytes of data we can accept for a specific port.
813 *****************************************************************************/
814
815 static unsigned int mos7840_write_room(struct tty_struct *tty)
816 {
817 struct usb_serial_port *port = tty->driver_data;
818 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
819 int i;
820 unsigned int room = 0;
821 unsigned long flags;
822
823 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
824 for (i = 0; i < NUM_URBS; ++i) {
825 if (!mos7840_port->busy[i])
826 room += URB_TRANSFER_BUFFER_SIZE;
827 }
828 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
829
830 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
831 dev_dbg(&mos7840_port->port->dev, "%s - returns %u\n", __func__, room);
832 return room;
833
834 }
835
836 /*****************************************************************************
837 * mos7840_write
838 * this function is called by the tty driver when data should be written to
839 * the port.
840 * If successful, we return the number of bytes written, otherwise we
841 * return a negative error number.
842 *****************************************************************************/
843
844 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
845 const unsigned char *data, int count)
846 {
847 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
848 struct usb_serial *serial = port->serial;
849 int status;
850 int i;
851 int bytes_sent = 0;
852 int transfer_size;
853 unsigned long flags;
854 struct urb *urb;
855 /* __u16 Data; */
856 const unsigned char *current_position = data;
857
858 /* try to find a free urb in the list */
859 urb = NULL;
860
861 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
862 for (i = 0; i < NUM_URBS; ++i) {
863 if (!mos7840_port->busy[i]) {
864 mos7840_port->busy[i] = 1;
865 urb = mos7840_port->write_urb_pool[i];
866 dev_dbg(&port->dev, "URB:%d\n", i);
867 break;
868 }
869 }
870 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
871
872 if (urb == NULL) {
873 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
874 goto exit;
875 }
876
877 if (urb->transfer_buffer == NULL) {
878 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
879 GFP_ATOMIC);
880 if (!urb->transfer_buffer) {
881 bytes_sent = -ENOMEM;
882 goto exit;
883 }
884 }
885 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
886
887 memcpy(urb->transfer_buffer, current_position, transfer_size);
888
889 /* fill urb with data and submit */
890 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
891 usb_fill_bulk_urb(urb,
892 serial->dev,
893 usb_sndbulkpipe(serial->dev,
894 (port->bulk_out_endpointAddress) + 2),
895 urb->transfer_buffer,
896 transfer_size,
897 mos7840_bulk_out_data_callback, mos7840_port);
898 } else {
899 usb_fill_bulk_urb(urb,
900 serial->dev,
901 usb_sndbulkpipe(serial->dev,
902 port->bulk_out_endpointAddress),
903 urb->transfer_buffer,
904 transfer_size,
905 mos7840_bulk_out_data_callback, mos7840_port);
906 }
907
908 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
909
910 if (mos7840_port->has_led)
911 mos7840_led_activity(port);
912
913 /* send it down the pipe */
914 status = usb_submit_urb(urb, GFP_ATOMIC);
915
916 if (status) {
917 mos7840_port->busy[i] = 0;
918 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
919 "with status = %d\n", __func__, status);
920 bytes_sent = status;
921 goto exit;
922 }
923 bytes_sent = transfer_size;
924 port->icount.tx += transfer_size;
925 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx);
926 exit:
927 return bytes_sent;
928
929 }
930
931 /*****************************************************************************
932 * mos7840_throttle
933 * this function is called by the tty driver when it wants to stop the data
934 * being read from the port.
935 *****************************************************************************/
936
937 static void mos7840_throttle(struct tty_struct *tty)
938 {
939 struct usb_serial_port *port = tty->driver_data;
940 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
941 int status;
942
943 /* if we are implementing XON/XOFF, send the stop character */
944 if (I_IXOFF(tty)) {
945 unsigned char stop_char = STOP_CHAR(tty);
946 status = mos7840_write(tty, port, &stop_char, 1);
947 if (status <= 0)
948 return;
949 }
950 /* if we are implementing RTS/CTS, toggle that line */
951 if (C_CRTSCTS(tty)) {
952 mos7840_port->shadowMCR &= ~MCR_RTS;
953 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
954 mos7840_port->shadowMCR);
955 if (status < 0)
956 return;
957 }
958 }
959
960 /*****************************************************************************
961 * mos7840_unthrottle
962 * this function is called by the tty driver when it wants to resume
963 * the data being read from the port (called after mos7840_throttle is
964 * called)
965 *****************************************************************************/
966 static void mos7840_unthrottle(struct tty_struct *tty)
967 {
968 struct usb_serial_port *port = tty->driver_data;
969 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
970 int status;
971
972 /* if we are implementing XON/XOFF, send the start character */
973 if (I_IXOFF(tty)) {
974 unsigned char start_char = START_CHAR(tty);
975 status = mos7840_write(tty, port, &start_char, 1);
976 if (status <= 0)
977 return;
978 }
979
980 /* if we are implementing RTS/CTS, toggle that line */
981 if (C_CRTSCTS(tty)) {
982 mos7840_port->shadowMCR |= MCR_RTS;
983 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
984 mos7840_port->shadowMCR);
985 if (status < 0)
986 return;
987 }
988 }
989
990 static int mos7840_tiocmget(struct tty_struct *tty)
991 {
992 struct usb_serial_port *port = tty->driver_data;
993 unsigned int result;
994 __u16 msr;
995 __u16 mcr;
996 int status;
997
998 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
999 if (status < 0)
1000 return -EIO;
1001 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1002 if (status < 0)
1003 return -EIO;
1004 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1005 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1006 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1007 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1008 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1009 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1010 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1011
1012 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1013
1014 return result;
1015 }
1016
1017 static int mos7840_tiocmset(struct tty_struct *tty,
1018 unsigned int set, unsigned int clear)
1019 {
1020 struct usb_serial_port *port = tty->driver_data;
1021 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
1022 unsigned int mcr;
1023 int status;
1024
1025 /* FIXME: What locks the port registers ? */
1026 mcr = mos7840_port->shadowMCR;
1027 if (clear & TIOCM_RTS)
1028 mcr &= ~MCR_RTS;
1029 if (clear & TIOCM_DTR)
1030 mcr &= ~MCR_DTR;
1031 if (clear & TIOCM_LOOP)
1032 mcr &= ~MCR_LOOPBACK;
1033
1034 if (set & TIOCM_RTS)
1035 mcr |= MCR_RTS;
1036 if (set & TIOCM_DTR)
1037 mcr |= MCR_DTR;
1038 if (set & TIOCM_LOOP)
1039 mcr |= MCR_LOOPBACK;
1040
1041 mos7840_port->shadowMCR = mcr;
1042
1043 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1044 if (status < 0) {
1045 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1046 return status;
1047 }
1048
1049 return 0;
1050 }
1051
1052 /*****************************************************************************
1053 * mos7840_calc_baud_rate_divisor
1054 * this function calculates the proper baud rate divisor for the specified
1055 * baud rate.
1056 *****************************************************************************/
1057 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1058 int baudRate, int *divisor,
1059 __u16 *clk_sel_val)
1060 {
1061 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1062
1063 if (baudRate <= 115200) {
1064 *divisor = 115200 / baudRate;
1065 *clk_sel_val = 0x0;
1066 }
1067 if ((baudRate > 115200) && (baudRate <= 230400)) {
1068 *divisor = 230400 / baudRate;
1069 *clk_sel_val = 0x10;
1070 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1071 *divisor = 403200 / baudRate;
1072 *clk_sel_val = 0x20;
1073 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1074 *divisor = 460800 / baudRate;
1075 *clk_sel_val = 0x30;
1076 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1077 *divisor = 806400 / baudRate;
1078 *clk_sel_val = 0x40;
1079 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1080 *divisor = 921600 / baudRate;
1081 *clk_sel_val = 0x50;
1082 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1083 *divisor = 1572864 / baudRate;
1084 *clk_sel_val = 0x60;
1085 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1086 *divisor = 3145728 / baudRate;
1087 *clk_sel_val = 0x70;
1088 }
1089 return 0;
1090 }
1091
1092 /*****************************************************************************
1093 * mos7840_send_cmd_write_baud_rate
1094 * this function sends the proper command to change the baud rate of the
1095 * specified port.
1096 *****************************************************************************/
1097
1098 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1099 int baudRate)
1100 {
1101 struct usb_serial_port *port = mos7840_port->port;
1102 int divisor = 0;
1103 int status;
1104 __u16 Data;
1105 __u16 clk_sel_val;
1106
1107 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate);
1108 /* reset clk_uart_sel in spregOffset */
1109 if (baudRate > 115200) {
1110 #ifdef HW_flow_control
1111 /* NOTE: need to see the pther register to modify */
1112 /* setting h/w flow control bit to 1 */
1113 Data = 0x2b;
1114 mos7840_port->shadowMCR = Data;
1115 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1116 Data);
1117 if (status < 0) {
1118 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1119 return -1;
1120 }
1121 #endif
1122
1123 } else {
1124 #ifdef HW_flow_control
1125 /* setting h/w flow control bit to 0 */
1126 Data = 0xb;
1127 mos7840_port->shadowMCR = Data;
1128 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1129 Data);
1130 if (status < 0) {
1131 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1132 return -1;
1133 }
1134 #endif
1135
1136 }
1137
1138 if (1) { /* baudRate <= 115200) */
1139 clk_sel_val = 0x0;
1140 Data = 0x0;
1141 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1142 &clk_sel_val);
1143 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1144 &Data);
1145 if (status < 0) {
1146 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1147 return -1;
1148 }
1149 Data = (Data & 0x8f) | clk_sel_val;
1150 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1151 Data);
1152 if (status < 0) {
1153 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1154 return -1;
1155 }
1156 /* Calculate the Divisor */
1157
1158 if (status) {
1159 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1160 return status;
1161 }
1162 /* Enable access to divisor latch */
1163 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1164 mos7840_port->shadowLCR = Data;
1165 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1166
1167 /* Write the divisor */
1168 Data = (unsigned char)(divisor & 0xff);
1169 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1170 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1171
1172 Data = (unsigned char)((divisor & 0xff00) >> 8);
1173 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1174 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1175
1176 /* Disable access to divisor latch */
1177 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1178 mos7840_port->shadowLCR = Data;
1179 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1180
1181 }
1182 return status;
1183 }
1184
1185 /*****************************************************************************
1186 * mos7840_change_port_settings
1187 * This routine is called to set the UART on the device to match
1188 * the specified new settings.
1189 *****************************************************************************/
1190
1191 static void mos7840_change_port_settings(struct tty_struct *tty,
1192 struct moschip_port *mos7840_port,
1193 const struct ktermios *old_termios)
1194 {
1195 struct usb_serial_port *port = mos7840_port->port;
1196 int baud;
1197 unsigned cflag;
1198 __u8 lData;
1199 __u8 lParity;
1200 __u8 lStop;
1201 int status;
1202 __u16 Data;
1203
1204 lData = LCR_BITS_8;
1205 lStop = LCR_STOP_1;
1206 lParity = LCR_PAR_NONE;
1207
1208 cflag = tty->termios.c_cflag;
1209
1210 /* Change the number of bits */
1211 switch (cflag & CSIZE) {
1212 case CS5:
1213 lData = LCR_BITS_5;
1214 break;
1215
1216 case CS6:
1217 lData = LCR_BITS_6;
1218 break;
1219
1220 case CS7:
1221 lData = LCR_BITS_7;
1222 break;
1223
1224 default:
1225 case CS8:
1226 lData = LCR_BITS_8;
1227 break;
1228 }
1229
1230 /* Change the Parity bit */
1231 if (cflag & PARENB) {
1232 if (cflag & PARODD) {
1233 lParity = LCR_PAR_ODD;
1234 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1235 } else {
1236 lParity = LCR_PAR_EVEN;
1237 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1238 }
1239
1240 } else {
1241 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1242 }
1243
1244 if (cflag & CMSPAR)
1245 lParity = lParity | 0x20;
1246
1247 /* Change the Stop bit */
1248 if (cflag & CSTOPB) {
1249 lStop = LCR_STOP_2;
1250 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1251 } else {
1252 lStop = LCR_STOP_1;
1253 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1254 }
1255
1256 /* Update the LCR with the correct value */
1257 mos7840_port->shadowLCR &=
1258 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1259 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1260
1261 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1262 mos7840_port->shadowLCR);
1263 /* Disable Interrupts */
1264 Data = 0x00;
1265 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1266
1267 Data = 0x00;
1268 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1269
1270 Data = 0xcf;
1271 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1272
1273 /* Send the updated LCR value to the mos7840 */
1274 Data = mos7840_port->shadowLCR;
1275
1276 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1277
1278 Data = 0x00b;
1279 mos7840_port->shadowMCR = Data;
1280 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1281 Data = 0x00b;
1282 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1283
1284 /* set up the MCR register and send it to the mos7840 */
1285
1286 mos7840_port->shadowMCR = MCR_MASTER_IE;
1287 if (cflag & CBAUD)
1288 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1289
1290 if (cflag & CRTSCTS)
1291 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1292 else
1293 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1294
1295 Data = mos7840_port->shadowMCR;
1296 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1297
1298 /* Determine divisor based on baud rate */
1299 baud = tty_get_baud_rate(tty);
1300
1301 if (!baud) {
1302 /* pick a default, any default... */
1303 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
1304 baud = 9600;
1305 }
1306
1307 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
1308 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1309
1310 /* Enable Interrupts */
1311 Data = 0x0c;
1312 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1313
1314 if (!mos7840_port->read_urb_busy) {
1315 mos7840_port->read_urb_busy = true;
1316 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1317 if (status) {
1318 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1319 status);
1320 mos7840_port->read_urb_busy = false;
1321 }
1322 }
1323 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1324 mos7840_port->shadowLCR);
1325 }
1326
1327 /*****************************************************************************
1328 * mos7840_set_termios
1329 * this function is called by the tty driver when it wants to change
1330 * the termios structure
1331 *****************************************************************************/
1332
1333 static void mos7840_set_termios(struct tty_struct *tty,
1334 struct usb_serial_port *port,
1335 const struct ktermios *old_termios)
1336 {
1337 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
1338 int status;
1339
1340 /* change the port settings to the new ones specified */
1341
1342 mos7840_change_port_settings(tty, mos7840_port, old_termios);
1343
1344 if (!mos7840_port->read_urb_busy) {
1345 mos7840_port->read_urb_busy = true;
1346 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1347 if (status) {
1348 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1349 status);
1350 mos7840_port->read_urb_busy = false;
1351 }
1352 }
1353 }
1354
1355 /*****************************************************************************
1356 * mos7840_get_lsr_info - get line status register info
1357 *
1358 * Purpose: Let user call ioctl() to get info when the UART physically
1359 * is emptied. On bus types like RS485, the transmitter must
1360 * release the bus after transmitting. This must be done when
1361 * the transmit shift register is empty, not be done when the
1362 * transmit holding register is empty. This functionality
1363 * allows an RS485 driver to be written in user space.
1364 *****************************************************************************/
1365
1366 static int mos7840_get_lsr_info(struct tty_struct *tty,
1367 unsigned int __user *value)
1368 {
1369 int count;
1370 unsigned int result = 0;
1371
1372 count = mos7840_chars_in_buffer(tty);
1373 if (count == 0)
1374 result = TIOCSER_TEMT;
1375
1376 if (copy_to_user(value, &result, sizeof(int)))
1377 return -EFAULT;
1378 return 0;
1379 }
1380
1381 /*****************************************************************************
1382 * SerialIoctl
1383 * this function handles any ioctl calls to the driver
1384 *****************************************************************************/
1385
1386 static int mos7840_ioctl(struct tty_struct *tty,
1387 unsigned int cmd, unsigned long arg)
1388 {
1389 struct usb_serial_port *port = tty->driver_data;
1390 void __user *argp = (void __user *)arg;
1391
1392 switch (cmd) {
1393 /* return number of bytes available */
1394
1395 case TIOCSERGETLSR:
1396 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1397 return mos7840_get_lsr_info(tty, argp);
1398
1399 default:
1400 break;
1401 }
1402 return -ENOIOCTLCMD;
1403 }
1404
1405 /*
1406 * Check if GPO (pin 42) is connected to GPI (pin 33) as recommended by ASIX
1407 * for MCS7810 by bit-banging a 16-bit word.
1408 *
1409 * Note that GPO is really RTS of the third port so this will toggle RTS of
1410 * port two or three on two- and four-port devices.
1411 */
1412 static int mos7810_check(struct usb_serial *serial)
1413 {
1414 int i, pass_count = 0;
1415 u8 *buf;
1416 __u16 data = 0, mcr_data = 0;
1417 __u16 test_pattern = 0x55AA;
1418 int res;
1419
1420 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
1421 if (!buf)
1422 return 0; /* failed to identify 7810 */
1423
1424 /* Store MCR setting */
1425 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
1426 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
1427 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
1428 if (res == VENDOR_READ_LENGTH)
1429 mcr_data = *buf;
1430
1431 for (i = 0; i < 16; i++) {
1432 /* Send the 1-bit test pattern out to MCS7810 test pin */
1433 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1434 MCS_WRREQ, MCS_WR_RTYPE,
1435 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
1436 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
1437
1438 /* Read the test pattern back */
1439 res = usb_control_msg(serial->dev,
1440 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ,
1441 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
1442 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
1443 if (res == VENDOR_READ_LENGTH)
1444 data = *buf;
1445
1446 /* If this is a MCS7810 device, both test patterns must match */
1447 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
1448 break;
1449
1450 pass_count++;
1451 }
1452
1453 /* Restore MCR setting */
1454 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
1455 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
1456 0, MOS_WDR_TIMEOUT);
1457
1458 kfree(buf);
1459
1460 if (pass_count == 16)
1461 return 1;
1462
1463 return 0;
1464 }
1465
1466 static int mos7840_probe(struct usb_serial *serial,
1467 const struct usb_device_id *id)
1468 {
1469 unsigned long device_flags = id->driver_info;
1470 u8 *buf;
1471
1472 /* Skip device-type detection if we already have device flags. */
1473 if (device_flags)
1474 goto out;
1475
1476 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
1477 if (!buf)
1478 return -ENOMEM;
1479
1480 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
1481 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
1482 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
1483
1484 /* For a MCS7840 device GPIO0 must be set to 1 */
1485 if (buf[0] & 0x01)
1486 device_flags = MCS_PORTS(4);
1487 else if (mos7810_check(serial))
1488 device_flags = MCS_PORTS(1) | MCS_LED;
1489 else
1490 device_flags = MCS_PORTS(2);
1491
1492 kfree(buf);
1493 out:
1494 usb_set_serial_data(serial, (void *)device_flags);
1495
1496 return 0;
1497 }
1498
1499 static int mos7840_calc_num_ports(struct usb_serial *serial,
1500 struct usb_serial_endpoints *epds)
1501 {
1502 unsigned long device_flags = (unsigned long)usb_get_serial_data(serial);
1503 int num_ports = MCS_PORTS(device_flags);
1504
1505 if (num_ports == 0 || num_ports > 4)
1506 return -ENODEV;
1507
1508 if (epds->num_bulk_in < num_ports || epds->num_bulk_out < num_ports) {
1509 dev_err(&serial->interface->dev, "missing endpoints\n");
1510 return -ENODEV;
1511 }
1512
1513 return num_ports;
1514 }
1515
1516 static int mos7840_attach(struct usb_serial *serial)
1517 {
1518 struct device *dev = &serial->interface->dev;
1519 int status;
1520 u16 val;
1521
1522 /* Zero Length flag enable */
1523 val = 0x0f;
1524 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, val);
1525 if (status < 0)
1526 dev_dbg(dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
1527 else
1528 dev_dbg(dev, "ZLP_REG5 Writing success status%d\n", status);
1529
1530 return status;
1531 }
1532
1533 static int mos7840_port_probe(struct usb_serial_port *port)
1534 {
1535 struct usb_serial *serial = port->serial;
1536 unsigned long device_flags = (unsigned long)usb_get_serial_data(serial);
1537 struct moschip_port *mos7840_port;
1538 int status;
1539 int pnum;
1540 __u16 Data;
1541
1542 /* we set up the pointers to the endpoints in the mos7840_open *
1543 * function, as the structures aren't created yet. */
1544
1545 pnum = port->port_number;
1546
1547 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
1548 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
1549 if (!mos7840_port)
1550 return -ENOMEM;
1551
1552 /* Initialize all port interrupt end point to port 0 int
1553 * endpoint. Our device has only one interrupt end point
1554 * common to all port */
1555
1556 mos7840_port->port = port;
1557 spin_lock_init(&mos7840_port->pool_lock);
1558
1559 /* minor is not initialised until later by
1560 * usb-serial.c:get_free_serial() and cannot therefore be used
1561 * to index device instances */
1562 mos7840_port->port_num = pnum + 1;
1563 dev_dbg(&port->dev, "port->minor = %d\n", port->minor);
1564 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
1565
1566 if (mos7840_port->port_num == 1) {
1567 mos7840_port->SpRegOffset = 0x0;
1568 mos7840_port->ControlRegOffset = 0x1;
1569 mos7840_port->DcrRegOffset = 0x4;
1570 } else {
1571 u8 phy_num = mos7840_port->port_num;
1572
1573 /* Port 2 in the 2-port case uses registers of port 3 */
1574 if (serial->num_ports == 2)
1575 phy_num = 3;
1576
1577 mos7840_port->SpRegOffset = 0x8 + 2 * (phy_num - 2);
1578 mos7840_port->ControlRegOffset = 0x9 + 2 * (phy_num - 2);
1579 mos7840_port->DcrRegOffset = 0x16 + 3 * (phy_num - 2);
1580 }
1581 mos7840_dump_serial_port(port, mos7840_port);
1582 usb_set_serial_port_data(port, mos7840_port);
1583
1584 /* enable rx_disable bit in control register */
1585 status = mos7840_get_reg_sync(port,
1586 mos7840_port->ControlRegOffset, &Data);
1587 if (status < 0) {
1588 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
1589 goto error;
1590 } else
1591 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
1592 Data |= 0x08; /* setting driver done bit */
1593 Data |= 0x04; /* sp1_bit to have cts change reflect in
1594 modem status reg */
1595
1596 /* Data |= 0x20; //rx_disable bit */
1597 status = mos7840_set_reg_sync(port,
1598 mos7840_port->ControlRegOffset, Data);
1599 if (status < 0) {
1600 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
1601 goto error;
1602 } else
1603 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
1604
1605 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
1606 and 0x24 in DCR3 */
1607 Data = 0x01;
1608 status = mos7840_set_reg_sync(port,
1609 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
1610 if (status < 0) {
1611 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
1612 goto error;
1613 } else
1614 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
1615
1616 Data = 0x05;
1617 status = mos7840_set_reg_sync(port,
1618 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
1619 if (status < 0) {
1620 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
1621 goto error;
1622 } else
1623 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
1624
1625 Data = 0x24;
1626 status = mos7840_set_reg_sync(port,
1627 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
1628 if (status < 0) {
1629 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
1630 goto error;
1631 } else
1632 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
1633
1634 /* write values in clkstart0x0 and clkmulti 0x20 */
1635 Data = 0x0;
1636 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
1637 if (status < 0) {
1638 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
1639 goto error;
1640 } else
1641 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
1642
1643 Data = 0x20;
1644 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
1645 if (status < 0) {
1646 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
1647 goto error;
1648 } else
1649 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
1650
1651 /* write value 0x0 to scratchpad register */
1652 Data = 0x00;
1653 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
1654 if (status < 0) {
1655 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
1656 goto error;
1657 } else
1658 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
1659
1660 /* Zero Length flag register */
1661 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
1662 Data = 0xff;
1663 status = mos7840_set_reg_sync(port,
1664 (__u16) (ZLP_REG1 +
1665 ((__u16)mos7840_port->port_num)), Data);
1666 dev_dbg(&port->dev, "ZLIP offset %x\n",
1667 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
1668 if (status < 0) {
1669 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
1670 goto error;
1671 } else
1672 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
1673 } else {
1674 Data = 0xff;
1675 status = mos7840_set_reg_sync(port,
1676 (__u16) (ZLP_REG1 +
1677 ((__u16)mos7840_port->port_num) - 0x1), Data);
1678 dev_dbg(&port->dev, "ZLIP offset %x\n",
1679 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
1680 if (status < 0) {
1681 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
1682 goto error;
1683 } else
1684 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
1685
1686 }
1687
1688 mos7840_port->has_led = device_flags & MCS_LED;
1689
1690 /* Initialize LED timers */
1691 if (mos7840_port->has_led) {
1692 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL);
1693 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr),
1694 GFP_KERNEL);
1695 if (!mos7840_port->led_urb || !mos7840_port->led_dr) {
1696 status = -ENOMEM;
1697 goto error;
1698 }
1699
1700 timer_setup(&mos7840_port->led_timer1, mos7840_led_off, 0);
1701 mos7840_port->led_timer1.expires =
1702 jiffies + msecs_to_jiffies(LED_ON_MS);
1703 timer_setup(&mos7840_port->led_timer2, mos7840_led_flag_off,
1704 0);
1705 mos7840_port->led_timer2.expires =
1706 jiffies + msecs_to_jiffies(LED_OFF_MS);
1707
1708 /* Turn off LED */
1709 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
1710 }
1711
1712 return 0;
1713 error:
1714 kfree(mos7840_port->led_dr);
1715 usb_free_urb(mos7840_port->led_urb);
1716 kfree(mos7840_port);
1717
1718 return status;
1719 }
1720
1721 static void mos7840_port_remove(struct usb_serial_port *port)
1722 {
1723 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
1724
1725 if (mos7840_port->has_led) {
1726 /* Turn off LED */
1727 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
1728
1729 timer_shutdown_sync(&mos7840_port->led_timer1);
1730 timer_shutdown_sync(&mos7840_port->led_timer2);
1731
1732 usb_kill_urb(mos7840_port->led_urb);
1733 usb_free_urb(mos7840_port->led_urb);
1734 kfree(mos7840_port->led_dr);
1735 }
1736
1737 kfree(mos7840_port);
1738 }
1739
1740 static int mos7840_suspend(struct usb_serial *serial, pm_message_t message)
1741 {
1742 struct moschip_port *mos7840_port;
1743 struct usb_serial_port *port;
1744 int i;
1745
1746 for (i = 0; i < serial->num_ports; ++i) {
1747 port = serial->port[i];
1748 if (!tty_port_initialized(&port->port))
1749 continue;
1750
1751 mos7840_port = usb_get_serial_port_data(port);
1752
1753 usb_kill_urb(mos7840_port->read_urb);
1754 mos7840_port->read_urb_busy = false;
1755 }
1756
1757 return 0;
1758 }
1759
1760 static int mos7840_resume(struct usb_serial *serial)
1761 {
1762 struct moschip_port *mos7840_port;
1763 struct usb_serial_port *port;
1764 int res;
1765 int i;
1766
1767 for (i = 0; i < serial->num_ports; ++i) {
1768 port = serial->port[i];
1769 if (!tty_port_initialized(&port->port))
1770 continue;
1771
1772 mos7840_port = usb_get_serial_port_data(port);
1773
1774 mos7840_port->read_urb_busy = true;
1775 res = usb_submit_urb(mos7840_port->read_urb, GFP_NOIO);
1776 if (res)
1777 mos7840_port->read_urb_busy = false;
1778 }
1779
1780 return 0;
1781 }
1782
1783 static struct usb_serial_driver moschip7840_4port_device = {
1784 .driver = {
1785 .name = "mos7840",
1786 },
1787 .description = DRIVER_DESC,
1788 .id_table = id_table,
1789 .num_interrupt_in = 1,
1790 .open = mos7840_open,
1791 .close = mos7840_close,
1792 .write = mos7840_write,
1793 .write_room = mos7840_write_room,
1794 .chars_in_buffer = mos7840_chars_in_buffer,
1795 .throttle = mos7840_throttle,
1796 .unthrottle = mos7840_unthrottle,
1797 .calc_num_ports = mos7840_calc_num_ports,
1798 .probe = mos7840_probe,
1799 .attach = mos7840_attach,
1800 .ioctl = mos7840_ioctl,
1801 .set_termios = mos7840_set_termios,
1802 .break_ctl = mos7840_break,
1803 .tiocmget = mos7840_tiocmget,
1804 .tiocmset = mos7840_tiocmset,
1805 .get_icount = usb_serial_generic_get_icount,
1806 .port_probe = mos7840_port_probe,
1807 .port_remove = mos7840_port_remove,
1808 .read_bulk_callback = mos7840_bulk_in_callback,
1809 .suspend = mos7840_suspend,
1810 .resume = mos7840_resume,
1811 };
1812
1813 static struct usb_serial_driver * const serial_drivers[] = {
1814 &moschip7840_4port_device, NULL
1815 };
1816
1817 module_usb_serial_driver(serial_drivers, id_table);
1818
1819 MODULE_DESCRIPTION(DRIVER_DESC);
1820 MODULE_LICENSE("GPL");
Kernel DRM miscellaneous fixes and cross-tree changes