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[mirror_ubuntu-zesty-kernel.git] / drivers / usb / serial / mxuport.c
1 /*
2 * mxuport.c - MOXA UPort series driver
3 *
4 * Copyright (c) 2006 Moxa Technologies Co., Ltd.
5 * Copyright (c) 2013 Andrew Lunn <andrew@lunn.ch>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * Supports the following Moxa USB to serial converters:
13 * 2 ports : UPort 1250, UPort 1250I
14 * 4 ports : UPort 1410, UPort 1450, UPort 1450I
15 * 8 ports : UPort 1610-8, UPort 1650-8
16 * 16 ports : UPort 1610-16, UPort 1650-16
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/firmware.h>
22 #include <linux/jiffies.h>
23 #include <linux/serial.h>
24 #include <linux/serial_reg.h>
25 #include <linux/slab.h>
26 #include <linux/tty.h>
27 #include <linux/tty_driver.h>
28 #include <linux/tty_flip.h>
29 #include <linux/uaccess.h>
30 #include <linux/usb.h>
31 #include <linux/usb/serial.h>
32 #include <asm/unaligned.h>
33
34 /* Definitions for the vendor ID and device ID */
35 #define MX_USBSERIAL_VID 0x110A
36 #define MX_UPORT1250_PID 0x1250
37 #define MX_UPORT1251_PID 0x1251
38 #define MX_UPORT1410_PID 0x1410
39 #define MX_UPORT1450_PID 0x1450
40 #define MX_UPORT1451_PID 0x1451
41 #define MX_UPORT1618_PID 0x1618
42 #define MX_UPORT1658_PID 0x1658
43 #define MX_UPORT1613_PID 0x1613
44 #define MX_UPORT1653_PID 0x1653
45
46 /* Definitions for USB info */
47 #define HEADER_SIZE 4
48 #define EVENT_LENGTH 8
49 #define DOWN_BLOCK_SIZE 64
50
51 /* Definitions for firmware info */
52 #define VER_ADDR_1 0x20
53 #define VER_ADDR_2 0x24
54 #define VER_ADDR_3 0x28
55
56 /* Definitions for USB vendor request */
57 #define RQ_VENDOR_NONE 0x00
58 #define RQ_VENDOR_SET_BAUD 0x01 /* Set baud rate */
59 #define RQ_VENDOR_SET_LINE 0x02 /* Set line status */
60 #define RQ_VENDOR_SET_CHARS 0x03 /* Set Xon/Xoff chars */
61 #define RQ_VENDOR_SET_RTS 0x04 /* Set RTS */
62 #define RQ_VENDOR_SET_DTR 0x05 /* Set DTR */
63 #define RQ_VENDOR_SET_XONXOFF 0x06 /* Set auto Xon/Xoff */
64 #define RQ_VENDOR_SET_RX_HOST_EN 0x07 /* Set RX host enable */
65 #define RQ_VENDOR_SET_OPEN 0x08 /* Set open/close port */
66 #define RQ_VENDOR_PURGE 0x09 /* Purge Rx/Tx buffer */
67 #define RQ_VENDOR_SET_MCR 0x0A /* Set MCR register */
68 #define RQ_VENDOR_SET_BREAK 0x0B /* Set Break signal */
69
70 #define RQ_VENDOR_START_FW_DOWN 0x0C /* Start firmware download */
71 #define RQ_VENDOR_STOP_FW_DOWN 0x0D /* Stop firmware download */
72 #define RQ_VENDOR_QUERY_FW_READY 0x0E /* Query if new firmware ready */
73
74 #define RQ_VENDOR_SET_FIFO_DISABLE 0x0F /* Set fifo disable */
75 #define RQ_VENDOR_SET_INTERFACE 0x10 /* Set interface */
76 #define RQ_VENDOR_SET_HIGH_PERFOR 0x11 /* Set hi-performance */
77
78 #define RQ_VENDOR_ERASE_BLOCK 0x12 /* Erase flash block */
79 #define RQ_VENDOR_WRITE_PAGE 0x13 /* Write flash page */
80 #define RQ_VENDOR_PREPARE_WRITE 0x14 /* Prepare write flash */
81 #define RQ_VENDOR_CONFIRM_WRITE 0x15 /* Confirm write flash */
82 #define RQ_VENDOR_LOCATE 0x16 /* Locate the device */
83
84 #define RQ_VENDOR_START_ROM_DOWN 0x17 /* Start firmware download */
85 #define RQ_VENDOR_ROM_DATA 0x18 /* Rom file data */
86 #define RQ_VENDOR_STOP_ROM_DOWN 0x19 /* Stop firmware download */
87 #define RQ_VENDOR_FW_DATA 0x20 /* Firmware data */
88
89 #define RQ_VENDOR_RESET_DEVICE 0x23 /* Try to reset the device */
90 #define RQ_VENDOR_QUERY_FW_CONFIG 0x24
91
92 #define RQ_VENDOR_GET_VERSION 0x81 /* Get firmware version */
93 #define RQ_VENDOR_GET_PAGE 0x82 /* Read flash page */
94 #define RQ_VENDOR_GET_ROM_PROC 0x83 /* Get ROM process state */
95
96 #define RQ_VENDOR_GET_INQUEUE 0x84 /* Data in input buffer */
97 #define RQ_VENDOR_GET_OUTQUEUE 0x85 /* Data in output buffer */
98
99 #define RQ_VENDOR_GET_MSR 0x86 /* Get modem status register */
100
101 /* Definitions for UPort event type */
102 #define UPORT_EVENT_NONE 0 /* None */
103 #define UPORT_EVENT_TXBUF_THRESHOLD 1 /* Tx buffer threshold */
104 #define UPORT_EVENT_SEND_NEXT 2 /* Send next */
105 #define UPORT_EVENT_MSR 3 /* Modem status */
106 #define UPORT_EVENT_LSR 4 /* Line status */
107 #define UPORT_EVENT_MCR 5 /* Modem control */
108
109 /* Definitions for serial event type */
110 #define SERIAL_EV_CTS 0x0008 /* CTS changed state */
111 #define SERIAL_EV_DSR 0x0010 /* DSR changed state */
112 #define SERIAL_EV_RLSD 0x0020 /* RLSD changed state */
113
114 /* Definitions for modem control event type */
115 #define SERIAL_EV_XOFF 0x40 /* XOFF received */
116
117 /* Definitions for line control of communication */
118 #define MX_WORDLENGTH_5 5
119 #define MX_WORDLENGTH_6 6
120 #define MX_WORDLENGTH_7 7
121 #define MX_WORDLENGTH_8 8
122
123 #define MX_PARITY_NONE 0
124 #define MX_PARITY_ODD 1
125 #define MX_PARITY_EVEN 2
126 #define MX_PARITY_MARK 3
127 #define MX_PARITY_SPACE 4
128
129 #define MX_STOP_BITS_1 0
130 #define MX_STOP_BITS_1_5 1
131 #define MX_STOP_BITS_2 2
132
133 #define MX_RTS_DISABLE 0x0
134 #define MX_RTS_ENABLE 0x1
135 #define MX_RTS_HW 0x2
136 #define MX_RTS_NO_CHANGE 0x3 /* Flag, not valid register value*/
137
138 #define MX_INT_RS232 0
139 #define MX_INT_2W_RS485 1
140 #define MX_INT_RS422 2
141 #define MX_INT_4W_RS485 3
142
143 /* Definitions for holding reason */
144 #define MX_WAIT_FOR_CTS 0x0001
145 #define MX_WAIT_FOR_DSR 0x0002
146 #define MX_WAIT_FOR_DCD 0x0004
147 #define MX_WAIT_FOR_XON 0x0008
148 #define MX_WAIT_FOR_START_TX 0x0010
149 #define MX_WAIT_FOR_UNTHROTTLE 0x0020
150 #define MX_WAIT_FOR_LOW_WATER 0x0040
151 #define MX_WAIT_FOR_SEND_NEXT 0x0080
152
153 #define MX_UPORT_2_PORT BIT(0)
154 #define MX_UPORT_4_PORT BIT(1)
155 #define MX_UPORT_8_PORT BIT(2)
156 #define MX_UPORT_16_PORT BIT(3)
157
158 /* This structure holds all of the local port information */
159 struct mxuport_port {
160 u8 mcr_state; /* Last MCR state */
161 u8 msr_state; /* Last MSR state */
162 struct mutex mutex; /* Protects mcr_state */
163 spinlock_t spinlock; /* Protects msr_state */
164 };
165
166 /* Table of devices that work with this driver */
167 static const struct usb_device_id mxuport_idtable[] = {
168 { USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1250_PID),
169 .driver_info = MX_UPORT_2_PORT },
170 { USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1251_PID),
171 .driver_info = MX_UPORT_2_PORT },
172 { USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1410_PID),
173 .driver_info = MX_UPORT_4_PORT },
174 { USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1450_PID),
175 .driver_info = MX_UPORT_4_PORT },
176 { USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1451_PID),
177 .driver_info = MX_UPORT_4_PORT },
178 { USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1618_PID),
179 .driver_info = MX_UPORT_8_PORT },
180 { USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1658_PID),
181 .driver_info = MX_UPORT_8_PORT },
182 { USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1613_PID),
183 .driver_info = MX_UPORT_16_PORT },
184 { USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1653_PID),
185 .driver_info = MX_UPORT_16_PORT },
186 {} /* Terminating entry */
187 };
188
189 MODULE_DEVICE_TABLE(usb, mxuport_idtable);
190
191 /*
192 * Add a four byte header containing the port number and the number of
193 * bytes of data in the message. Return the number of bytes in the
194 * buffer.
195 */
196 static int mxuport_prepare_write_buffer(struct usb_serial_port *port,
197 void *dest, size_t size)
198 {
199 u8 *buf = dest;
200 int count;
201
202 count = kfifo_out_locked(&port->write_fifo, buf + HEADER_SIZE,
203 size - HEADER_SIZE,
204 &port->lock);
205
206 put_unaligned_be16(port->port_number, buf);
207 put_unaligned_be16(count, buf + 2);
208
209 dev_dbg(&port->dev, "%s - size %zd count %d\n", __func__,
210 size, count);
211
212 return count + HEADER_SIZE;
213 }
214
215 /* Read the given buffer in from the control pipe. */
216 static int mxuport_recv_ctrl_urb(struct usb_serial *serial,
217 u8 request, u16 value, u16 index,
218 u8 *data, size_t size)
219 {
220 int status;
221
222 status = usb_control_msg(serial->dev,
223 usb_rcvctrlpipe(serial->dev, 0),
224 request,
225 (USB_DIR_IN | USB_TYPE_VENDOR |
226 USB_RECIP_DEVICE), value, index,
227 data, size,
228 USB_CTRL_GET_TIMEOUT);
229 if (status < 0) {
230 dev_err(&serial->interface->dev,
231 "%s - usb_control_msg failed (%d)\n",
232 __func__, status);
233 return status;
234 }
235
236 if (status != size) {
237 dev_err(&serial->interface->dev,
238 "%s - short read (%d / %zd)\n",
239 __func__, status, size);
240 return -EIO;
241 }
242
243 return status;
244 }
245
246 /* Write the given buffer out to the control pipe. */
247 static int mxuport_send_ctrl_data_urb(struct usb_serial *serial,
248 u8 request,
249 u16 value, u16 index,
250 u8 *data, size_t size)
251 {
252 int status;
253
254 status = usb_control_msg(serial->dev,
255 usb_sndctrlpipe(serial->dev, 0),
256 request,
257 (USB_DIR_OUT | USB_TYPE_VENDOR |
258 USB_RECIP_DEVICE), value, index,
259 data, size,
260 USB_CTRL_SET_TIMEOUT);
261 if (status < 0) {
262 dev_err(&serial->interface->dev,
263 "%s - usb_control_msg failed (%d)\n",
264 __func__, status);
265 return status;
266 }
267
268 if (status != size) {
269 dev_err(&serial->interface->dev,
270 "%s - short write (%d / %zd)\n",
271 __func__, status, size);
272 return -EIO;
273 }
274
275 return 0;
276 }
277
278 /* Send a vendor request without any data */
279 static int mxuport_send_ctrl_urb(struct usb_serial *serial,
280 u8 request, u16 value, u16 index)
281 {
282 return mxuport_send_ctrl_data_urb(serial, request, value, index,
283 NULL, 0);
284 }
285
286 /*
287 * mxuport_throttle - throttle function of driver
288 *
289 * This function is called by the tty driver when it wants to stop the
290 * data being read from the port. Since all the data comes over one
291 * bulk in endpoint, we cannot stop submitting urbs by setting
292 * port->throttle. Instead tell the device to stop sending us data for
293 * the port.
294 */
295 static void mxuport_throttle(struct tty_struct *tty)
296 {
297 struct usb_serial_port *port = tty->driver_data;
298 struct usb_serial *serial = port->serial;
299
300 dev_dbg(&port->dev, "%s\n", __func__);
301
302 mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN,
303 0, port->port_number);
304 }
305
306 /*
307 * mxuport_unthrottle - unthrottle function of driver
308 *
309 * This function is called by the tty driver when it wants to resume
310 * the data being read from the port. Tell the device it can resume
311 * sending us received data from the port.
312 */
313 static void mxuport_unthrottle(struct tty_struct *tty)
314 {
315
316 struct usb_serial_port *port = tty->driver_data;
317 struct usb_serial *serial = port->serial;
318
319 dev_dbg(&port->dev, "%s\n", __func__);
320
321 mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN,
322 1, port->port_number);
323 }
324
325 /*
326 * Processes one chunk of data received for a port. Mostly a copy of
327 * usb_serial_generic_process_read_urb().
328 */
329 static void mxuport_process_read_urb_data(struct usb_serial_port *port,
330 char *data, int size)
331 {
332 int i;
333
334 if (!port->port.console || !port->sysrq) {
335 tty_insert_flip_string(&port->port, data, size);
336 } else {
337 for (i = 0; i < size; i++, data++) {
338 if (!usb_serial_handle_sysrq_char(port, *data))
339 tty_insert_flip_char(&port->port, *data,
340 TTY_NORMAL);
341 }
342 }
343 tty_flip_buffer_push(&port->port);
344 }
345
346 static void mxuport_msr_event(struct usb_serial_port *port, u8 buf[4])
347 {
348 struct mxuport_port *mxport = usb_get_serial_port_data(port);
349 u8 rcv_msr_hold = buf[2] & 0xF0;
350 u16 rcv_msr_event = get_unaligned_be16(buf);
351 unsigned long flags;
352
353 if (rcv_msr_event == 0)
354 return;
355
356 /* Update MSR status */
357 spin_lock_irqsave(&mxport->spinlock, flags);
358
359 dev_dbg(&port->dev, "%s - current MSR status = 0x%x\n",
360 __func__, mxport->msr_state);
361
362 if (rcv_msr_hold & UART_MSR_CTS) {
363 mxport->msr_state |= UART_MSR_CTS;
364 dev_dbg(&port->dev, "%s - CTS high\n", __func__);
365 } else {
366 mxport->msr_state &= ~UART_MSR_CTS;
367 dev_dbg(&port->dev, "%s - CTS low\n", __func__);
368 }
369
370 if (rcv_msr_hold & UART_MSR_DSR) {
371 mxport->msr_state |= UART_MSR_DSR;
372 dev_dbg(&port->dev, "%s - DSR high\n", __func__);
373 } else {
374 mxport->msr_state &= ~UART_MSR_DSR;
375 dev_dbg(&port->dev, "%s - DSR low\n", __func__);
376 }
377
378 if (rcv_msr_hold & UART_MSR_DCD) {
379 mxport->msr_state |= UART_MSR_DCD;
380 dev_dbg(&port->dev, "%s - DCD high\n", __func__);
381 } else {
382 mxport->msr_state &= ~UART_MSR_DCD;
383 dev_dbg(&port->dev, "%s - DCD low\n", __func__);
384 }
385 spin_unlock_irqrestore(&mxport->spinlock, flags);
386
387 if (rcv_msr_event &
388 (SERIAL_EV_CTS | SERIAL_EV_DSR | SERIAL_EV_RLSD)) {
389
390 if (rcv_msr_event & SERIAL_EV_CTS) {
391 port->icount.cts++;
392 dev_dbg(&port->dev, "%s - CTS change\n", __func__);
393 }
394
395 if (rcv_msr_event & SERIAL_EV_DSR) {
396 port->icount.dsr++;
397 dev_dbg(&port->dev, "%s - DSR change\n", __func__);
398 }
399
400 if (rcv_msr_event & SERIAL_EV_RLSD) {
401 port->icount.dcd++;
402 dev_dbg(&port->dev, "%s - DCD change\n", __func__);
403 }
404 wake_up_interruptible(&port->port.delta_msr_wait);
405 }
406 }
407
408 static void mxuport_lsr_event(struct usb_serial_port *port, u8 buf[4])
409 {
410 u8 lsr_event = buf[2];
411
412 if (lsr_event & UART_LSR_BI) {
413 port->icount.brk++;
414 dev_dbg(&port->dev, "%s - break error\n", __func__);
415 }
416
417 if (lsr_event & UART_LSR_FE) {
418 port->icount.frame++;
419 dev_dbg(&port->dev, "%s - frame error\n", __func__);
420 }
421
422 if (lsr_event & UART_LSR_PE) {
423 port->icount.parity++;
424 dev_dbg(&port->dev, "%s - parity error\n", __func__);
425 }
426
427 if (lsr_event & UART_LSR_OE) {
428 port->icount.overrun++;
429 dev_dbg(&port->dev, "%s - overrun error\n", __func__);
430 }
431 }
432
433 /*
434 * When something interesting happens, modem control lines XON/XOFF
435 * etc, the device sends an event. Process these events.
436 */
437 static void mxuport_process_read_urb_event(struct usb_serial_port *port,
438 u8 buf[4], u32 event)
439 {
440 dev_dbg(&port->dev, "%s - receive event : %04x\n", __func__, event);
441
442 switch (event) {
443 case UPORT_EVENT_SEND_NEXT:
444 /*
445 * Sent as part of the flow control on device buffers.
446 * Not currently used.
447 */
448 break;
449 case UPORT_EVENT_MSR:
450 mxuport_msr_event(port, buf);
451 break;
452 case UPORT_EVENT_LSR:
453 mxuport_lsr_event(port, buf);
454 break;
455 case UPORT_EVENT_MCR:
456 /*
457 * Event to indicate a change in XON/XOFF from the
458 * peer. Currently not used. We just continue
459 * sending the device data and it will buffer it if
460 * needed. This event could be used for flow control
461 * between the host and the device.
462 */
463 break;
464 default:
465 dev_dbg(&port->dev, "Unexpected event\n");
466 break;
467 }
468 }
469
470 /*
471 * One URB can contain data for multiple ports. Demultiplex the data,
472 * checking the port exists, is opened and the message is valid.
473 */
474 static void mxuport_process_read_urb_demux_data(struct urb *urb)
475 {
476 struct usb_serial_port *port = urb->context;
477 struct usb_serial *serial = port->serial;
478 u8 *data = urb->transfer_buffer;
479 u8 *end = data + urb->actual_length;
480 struct usb_serial_port *demux_port;
481 u8 *ch;
482 u16 rcv_port;
483 u16 rcv_len;
484
485 while (data < end) {
486 if (data + HEADER_SIZE > end) {
487 dev_warn(&port->dev, "%s - message with short header\n",
488 __func__);
489 return;
490 }
491
492 rcv_port = get_unaligned_be16(data);
493 if (rcv_port >= serial->num_ports) {
494 dev_warn(&port->dev, "%s - message for invalid port\n",
495 __func__);
496 return;
497 }
498
499 demux_port = serial->port[rcv_port];
500 rcv_len = get_unaligned_be16(data + 2);
501 if (!rcv_len || data + HEADER_SIZE + rcv_len > end) {
502 dev_warn(&port->dev, "%s - short data\n", __func__);
503 return;
504 }
505
506 if (test_bit(ASYNCB_INITIALIZED, &demux_port->port.flags)) {
507 ch = data + HEADER_SIZE;
508 mxuport_process_read_urb_data(demux_port, ch, rcv_len);
509 } else {
510 dev_dbg(&demux_port->dev, "%s - data for closed port\n",
511 __func__);
512 }
513 data += HEADER_SIZE + rcv_len;
514 }
515 }
516
517 /*
518 * One URB can contain events for multiple ports. Demultiplex the event,
519 * checking the port exists, and is opened.
520 */
521 static void mxuport_process_read_urb_demux_event(struct urb *urb)
522 {
523 struct usb_serial_port *port = urb->context;
524 struct usb_serial *serial = port->serial;
525 u8 *data = urb->transfer_buffer;
526 u8 *end = data + urb->actual_length;
527 struct usb_serial_port *demux_port;
528 u8 *ch;
529 u16 rcv_port;
530 u16 rcv_event;
531
532 while (data < end) {
533 if (data + EVENT_LENGTH > end) {
534 dev_warn(&port->dev, "%s - message with short event\n",
535 __func__);
536 return;
537 }
538
539 rcv_port = get_unaligned_be16(data);
540 if (rcv_port >= serial->num_ports) {
541 dev_warn(&port->dev, "%s - message for invalid port\n",
542 __func__);
543 return;
544 }
545
546 demux_port = serial->port[rcv_port];
547 if (test_bit(ASYNCB_INITIALIZED, &demux_port->port.flags)) {
548 ch = data + HEADER_SIZE;
549 rcv_event = get_unaligned_be16(data + 2);
550 mxuport_process_read_urb_event(demux_port, ch,
551 rcv_event);
552 } else {
553 dev_dbg(&demux_port->dev,
554 "%s - event for closed port\n", __func__);
555 }
556 data += EVENT_LENGTH;
557 }
558 }
559
560 /*
561 * This is called when we have received data on the bulk in
562 * endpoint. Depending on which port it was received on, it can
563 * contain serial data or events.
564 */
565 static void mxuport_process_read_urb(struct urb *urb)
566 {
567 struct usb_serial_port *port = urb->context;
568 struct usb_serial *serial = port->serial;
569
570 if (port == serial->port[0])
571 mxuport_process_read_urb_demux_data(urb);
572
573 if (port == serial->port[1])
574 mxuport_process_read_urb_demux_event(urb);
575 }
576
577 /*
578 * Ask the device how many bytes it has queued to be sent out. If
579 * there are none, return true.
580 */
581 static bool mxuport_tx_empty(struct usb_serial_port *port)
582 {
583 struct usb_serial *serial = port->serial;
584 bool is_empty = true;
585 u32 txlen;
586 u8 *len_buf;
587 int err;
588
589 len_buf = kzalloc(4, GFP_KERNEL);
590 if (!len_buf)
591 goto out;
592
593 err = mxuport_recv_ctrl_urb(serial, RQ_VENDOR_GET_OUTQUEUE, 0,
594 port->port_number, len_buf, 4);
595 if (err < 0)
596 goto out;
597
598 txlen = get_unaligned_be32(len_buf);
599 dev_dbg(&port->dev, "%s - tx len = %u\n", __func__, txlen);
600
601 if (txlen != 0)
602 is_empty = false;
603
604 out:
605 kfree(len_buf);
606 return is_empty;
607 }
608
609 static int mxuport_set_mcr(struct usb_serial_port *port, u8 mcr_state)
610 {
611 struct usb_serial *serial = port->serial;
612 int err;
613
614 dev_dbg(&port->dev, "%s - %02x\n", __func__, mcr_state);
615
616 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_MCR,
617 mcr_state, port->port_number);
618 if (err)
619 dev_err(&port->dev, "%s - failed to change MCR\n", __func__);
620
621 return err;
622 }
623
624 static int mxuport_set_dtr(struct usb_serial_port *port, int on)
625 {
626 struct mxuport_port *mxport = usb_get_serial_port_data(port);
627 struct usb_serial *serial = port->serial;
628 int err;
629
630 mutex_lock(&mxport->mutex);
631
632 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_DTR,
633 !!on, port->port_number);
634 if (!err) {
635 if (on)
636 mxport->mcr_state |= UART_MCR_DTR;
637 else
638 mxport->mcr_state &= ~UART_MCR_DTR;
639 }
640
641 mutex_unlock(&mxport->mutex);
642
643 return err;
644 }
645
646 static int mxuport_set_rts(struct usb_serial_port *port, u8 state)
647 {
648 struct mxuport_port *mxport = usb_get_serial_port_data(port);
649 struct usb_serial *serial = port->serial;
650 int err;
651 u8 mcr_state;
652
653 mutex_lock(&mxport->mutex);
654 mcr_state = mxport->mcr_state;
655
656 switch (state) {
657 case MX_RTS_DISABLE:
658 mcr_state &= ~UART_MCR_RTS;
659 break;
660 case MX_RTS_ENABLE:
661 mcr_state |= UART_MCR_RTS;
662 break;
663 case MX_RTS_HW:
664 /*
665 * Do not update mxport->mcr_state when doing hardware
666 * flow control.
667 */
668 break;
669 default:
670 /*
671 * Should not happen, but somebody might try passing
672 * MX_RTS_NO_CHANGE, which is not valid.
673 */
674 err = -EINVAL;
675 goto out;
676 }
677 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RTS,
678 state, port->port_number);
679 if (!err)
680 mxport->mcr_state = mcr_state;
681
682 out:
683 mutex_unlock(&mxport->mutex);
684
685 return err;
686 }
687
688 static void mxuport_dtr_rts(struct usb_serial_port *port, int on)
689 {
690 struct mxuport_port *mxport = usb_get_serial_port_data(port);
691 u8 mcr_state;
692 int err;
693
694 mutex_lock(&mxport->mutex);
695 mcr_state = mxport->mcr_state;
696
697 if (on)
698 mcr_state |= (UART_MCR_RTS | UART_MCR_DTR);
699 else
700 mcr_state &= ~(UART_MCR_RTS | UART_MCR_DTR);
701
702 err = mxuport_set_mcr(port, mcr_state);
703 if (!err)
704 mxport->mcr_state = mcr_state;
705
706 mutex_unlock(&mxport->mutex);
707 }
708
709 static int mxuport_tiocmset(struct tty_struct *tty, unsigned int set,
710 unsigned int clear)
711 {
712 struct usb_serial_port *port = tty->driver_data;
713 struct mxuport_port *mxport = usb_get_serial_port_data(port);
714 int err;
715 u8 mcr_state;
716
717 mutex_lock(&mxport->mutex);
718 mcr_state = mxport->mcr_state;
719
720 if (set & TIOCM_RTS)
721 mcr_state |= UART_MCR_RTS;
722
723 if (set & TIOCM_DTR)
724 mcr_state |= UART_MCR_DTR;
725
726 if (clear & TIOCM_RTS)
727 mcr_state &= ~UART_MCR_RTS;
728
729 if (clear & TIOCM_DTR)
730 mcr_state &= ~UART_MCR_DTR;
731
732 err = mxuport_set_mcr(port, mcr_state);
733 if (!err)
734 mxport->mcr_state = mcr_state;
735
736 mutex_unlock(&mxport->mutex);
737
738 return err;
739 }
740
741 static int mxuport_tiocmget(struct tty_struct *tty)
742 {
743 struct mxuport_port *mxport;
744 struct usb_serial_port *port = tty->driver_data;
745 unsigned int result;
746 unsigned long flags;
747 unsigned int msr;
748 unsigned int mcr;
749
750 mxport = usb_get_serial_port_data(port);
751
752 mutex_lock(&mxport->mutex);
753 spin_lock_irqsave(&mxport->spinlock, flags);
754
755 msr = mxport->msr_state;
756 mcr = mxport->mcr_state;
757
758 spin_unlock_irqrestore(&mxport->spinlock, flags);
759 mutex_unlock(&mxport->mutex);
760
761 result = (((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) | /* 0x002 */
762 ((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) | /* 0x004 */
763 ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) | /* 0x020 */
764 ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) | /* 0x040 */
765 ((msr & UART_MSR_RI) ? TIOCM_RI : 0) | /* 0x080 */
766 ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0)); /* 0x100 */
767
768 dev_dbg(&port->dev, "%s - 0x%04x\n", __func__, result);
769
770 return result;
771 }
772
773 static int mxuport_set_termios_flow(struct tty_struct *tty,
774 struct ktermios *old_termios,
775 struct usb_serial_port *port,
776 struct usb_serial *serial)
777 {
778 u8 xon = START_CHAR(tty);
779 u8 xoff = STOP_CHAR(tty);
780 int enable;
781 int err;
782 u8 *buf;
783 u8 rts;
784
785 buf = kmalloc(2, GFP_KERNEL);
786 if (!buf)
787 return -ENOMEM;
788
789 /* S/W flow control settings */
790 if (I_IXOFF(tty) || I_IXON(tty)) {
791 enable = 1;
792 buf[0] = xon;
793 buf[1] = xoff;
794
795 err = mxuport_send_ctrl_data_urb(serial, RQ_VENDOR_SET_CHARS,
796 0, port->port_number,
797 buf, 2);
798 if (err)
799 goto out;
800
801 dev_dbg(&port->dev, "%s - XON = 0x%02x, XOFF = 0x%02x\n",
802 __func__, xon, xoff);
803 } else {
804 enable = 0;
805 }
806
807 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_XONXOFF,
808 enable, port->port_number);
809 if (err)
810 goto out;
811
812 rts = MX_RTS_NO_CHANGE;
813
814 /* H/W flow control settings */
815 if (!old_termios ||
816 C_CRTSCTS(tty) != (old_termios->c_cflag & CRTSCTS)) {
817 if (C_CRTSCTS(tty))
818 rts = MX_RTS_HW;
819 else
820 rts = MX_RTS_ENABLE;
821 }
822
823 if (C_BAUD(tty)) {
824 if (old_termios && (old_termios->c_cflag & CBAUD) == B0) {
825 /* Raise DTR and RTS */
826 if (C_CRTSCTS(tty))
827 rts = MX_RTS_HW;
828 else
829 rts = MX_RTS_ENABLE;
830 mxuport_set_dtr(port, 1);
831 }
832 } else {
833 /* Drop DTR and RTS */
834 rts = MX_RTS_DISABLE;
835 mxuport_set_dtr(port, 0);
836 }
837
838 if (rts != MX_RTS_NO_CHANGE)
839 err = mxuport_set_rts(port, rts);
840
841 out:
842 kfree(buf);
843 return err;
844 }
845
846 static void mxuport_set_termios(struct tty_struct *tty,
847 struct usb_serial_port *port,
848 struct ktermios *old_termios)
849 {
850 struct usb_serial *serial = port->serial;
851 u8 *buf;
852 u8 data_bits;
853 u8 stop_bits;
854 u8 parity;
855 int baud;
856 int err;
857
858 if (old_termios &&
859 !tty_termios_hw_change(&tty->termios, old_termios) &&
860 tty->termios.c_iflag == old_termios->c_iflag) {
861 dev_dbg(&port->dev, "%s - nothing to change\n", __func__);
862 return;
863 }
864
865 buf = kmalloc(4, GFP_KERNEL);
866 if (!buf)
867 return;
868
869 /* Set data bit of termios */
870 switch (C_CSIZE(tty)) {
871 case CS5:
872 data_bits = MX_WORDLENGTH_5;
873 break;
874 case CS6:
875 data_bits = MX_WORDLENGTH_6;
876 break;
877 case CS7:
878 data_bits = MX_WORDLENGTH_7;
879 break;
880 case CS8:
881 default:
882 data_bits = MX_WORDLENGTH_8;
883 break;
884 }
885
886 /* Set parity of termios */
887 if (C_PARENB(tty)) {
888 if (C_CMSPAR(tty)) {
889 if (C_PARODD(tty))
890 parity = MX_PARITY_MARK;
891 else
892 parity = MX_PARITY_SPACE;
893 } else {
894 if (C_PARODD(tty))
895 parity = MX_PARITY_ODD;
896 else
897 parity = MX_PARITY_EVEN;
898 }
899 } else {
900 parity = MX_PARITY_NONE;
901 }
902
903 /* Set stop bit of termios */
904 if (C_CSTOPB(tty))
905 stop_bits = MX_STOP_BITS_2;
906 else
907 stop_bits = MX_STOP_BITS_1;
908
909 buf[0] = data_bits;
910 buf[1] = parity;
911 buf[2] = stop_bits;
912 buf[3] = 0;
913
914 err = mxuport_send_ctrl_data_urb(serial, RQ_VENDOR_SET_LINE,
915 0, port->port_number, buf, 4);
916 if (err)
917 goto out;
918
919 err = mxuport_set_termios_flow(tty, old_termios, port, serial);
920 if (err)
921 goto out;
922
923 baud = tty_get_baud_rate(tty);
924 if (!baud)
925 baud = 9600;
926
927 /* Note: Little Endian */
928 put_unaligned_le32(baud, buf);
929
930 err = mxuport_send_ctrl_data_urb(serial, RQ_VENDOR_SET_BAUD,
931 0, port->port_number,
932 buf, 4);
933 if (err)
934 goto out;
935
936 dev_dbg(&port->dev, "baud_rate : %d\n", baud);
937 dev_dbg(&port->dev, "data_bits : %d\n", data_bits);
938 dev_dbg(&port->dev, "parity : %d\n", parity);
939 dev_dbg(&port->dev, "stop_bits : %d\n", stop_bits);
940
941 out:
942 kfree(buf);
943 }
944
945 /*
946 * Determine how many ports this device has dynamically. It will be
947 * called after the probe() callback is called, but before attach().
948 */
949 static int mxuport_calc_num_ports(struct usb_serial *serial)
950 {
951 unsigned long features = (unsigned long)usb_get_serial_data(serial);
952
953 if (features & MX_UPORT_2_PORT)
954 return 2;
955 if (features & MX_UPORT_4_PORT)
956 return 4;
957 if (features & MX_UPORT_8_PORT)
958 return 8;
959 if (features & MX_UPORT_16_PORT)
960 return 16;
961
962 return 0;
963 }
964
965 /* Get the version of the firmware currently running. */
966 static int mxuport_get_fw_version(struct usb_serial *serial, u32 *version)
967 {
968 u8 *ver_buf;
969 int err;
970
971 ver_buf = kzalloc(4, GFP_KERNEL);
972 if (!ver_buf)
973 return -ENOMEM;
974
975 /* Get firmware version from SDRAM */
976 err = mxuport_recv_ctrl_urb(serial, RQ_VENDOR_GET_VERSION, 0, 0,
977 ver_buf, 4);
978 if (err != 4) {
979 err = -EIO;
980 goto out;
981 }
982
983 *version = (ver_buf[0] << 16) | (ver_buf[1] << 8) | ver_buf[2];
984 err = 0;
985 out:
986 kfree(ver_buf);
987 return err;
988 }
989
990 /* Given a firmware blob, download it to the device. */
991 static int mxuport_download_fw(struct usb_serial *serial,
992 const struct firmware *fw_p)
993 {
994 u8 *fw_buf;
995 size_t txlen;
996 size_t fwidx;
997 int err;
998
999 fw_buf = kmalloc(DOWN_BLOCK_SIZE, GFP_KERNEL);
1000 if (!fw_buf)
1001 return -ENOMEM;
1002
1003 dev_dbg(&serial->interface->dev, "Starting firmware download...\n");
1004 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_START_FW_DOWN, 0, 0);
1005 if (err)
1006 goto out;
1007
1008 fwidx = 0;
1009 do {
1010 txlen = min_t(size_t, (fw_p->size - fwidx), DOWN_BLOCK_SIZE);
1011
1012 memcpy(fw_buf, &fw_p->data[fwidx], txlen);
1013 err = mxuport_send_ctrl_data_urb(serial, RQ_VENDOR_FW_DATA,
1014 0, 0, fw_buf, txlen);
1015 if (err) {
1016 mxuport_send_ctrl_urb(serial, RQ_VENDOR_STOP_FW_DOWN,
1017 0, 0);
1018 goto out;
1019 }
1020
1021 fwidx += txlen;
1022 usleep_range(1000, 2000);
1023
1024 } while (fwidx < fw_p->size);
1025
1026 msleep(1000);
1027 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_STOP_FW_DOWN, 0, 0);
1028 if (err)
1029 goto out;
1030
1031 msleep(1000);
1032 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_QUERY_FW_READY, 0, 0);
1033
1034 out:
1035 kfree(fw_buf);
1036 return err;
1037 }
1038
1039 static int mxuport_probe(struct usb_serial *serial,
1040 const struct usb_device_id *id)
1041 {
1042 u16 productid = le16_to_cpu(serial->dev->descriptor.idProduct);
1043 const struct firmware *fw_p = NULL;
1044 u32 version;
1045 int local_ver;
1046 char buf[32];
1047 int err;
1048
1049 /* Load our firmware */
1050 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_QUERY_FW_CONFIG, 0, 0);
1051 if (err) {
1052 mxuport_send_ctrl_urb(serial, RQ_VENDOR_RESET_DEVICE, 0, 0);
1053 return err;
1054 }
1055
1056 err = mxuport_get_fw_version(serial, &version);
1057 if (err < 0)
1058 return err;
1059
1060 dev_dbg(&serial->interface->dev, "Device firmware version v%x.%x.%x\n",
1061 (version & 0xff0000) >> 16,
1062 (version & 0xff00) >> 8,
1063 (version & 0xff));
1064
1065 snprintf(buf, sizeof(buf) - 1, "moxa/moxa-%04x.fw", productid);
1066
1067 err = request_firmware(&fw_p, buf, &serial->interface->dev);
1068 if (err) {
1069 dev_warn(&serial->interface->dev, "Firmware %s not found\n",
1070 buf);
1071
1072 /* Use the firmware already in the device */
1073 err = 0;
1074 } else {
1075 local_ver = ((fw_p->data[VER_ADDR_1] << 16) |
1076 (fw_p->data[VER_ADDR_2] << 8) |
1077 fw_p->data[VER_ADDR_3]);
1078 dev_dbg(&serial->interface->dev,
1079 "Available firmware version v%x.%x.%x\n",
1080 fw_p->data[VER_ADDR_1], fw_p->data[VER_ADDR_2],
1081 fw_p->data[VER_ADDR_3]);
1082 if (local_ver > version) {
1083 err = mxuport_download_fw(serial, fw_p);
1084 if (err)
1085 goto out;
1086 err = mxuport_get_fw_version(serial, &version);
1087 if (err < 0)
1088 goto out;
1089 }
1090 }
1091
1092 dev_info(&serial->interface->dev,
1093 "Using device firmware version v%x.%x.%x\n",
1094 (version & 0xff0000) >> 16,
1095 (version & 0xff00) >> 8,
1096 (version & 0xff));
1097
1098 /*
1099 * Contains the features of this hardware. Store away for
1100 * later use, eg, number of ports.
1101 */
1102 usb_set_serial_data(serial, (void *)id->driver_info);
1103 out:
1104 if (fw_p)
1105 release_firmware(fw_p);
1106 return err;
1107 }
1108
1109
1110 static int mxuport_port_probe(struct usb_serial_port *port)
1111 {
1112 struct usb_serial *serial = port->serial;
1113 struct mxuport_port *mxport;
1114 int err;
1115
1116 mxport = devm_kzalloc(&port->dev, sizeof(struct mxuport_port),
1117 GFP_KERNEL);
1118 if (!mxport)
1119 return -ENOMEM;
1120
1121 mutex_init(&mxport->mutex);
1122 spin_lock_init(&mxport->spinlock);
1123
1124 /* Set the port private data */
1125 usb_set_serial_port_data(port, mxport);
1126
1127 /* Set FIFO (Enable) */
1128 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_FIFO_DISABLE,
1129 0, port->port_number);
1130 if (err)
1131 return err;
1132
1133 /* Set transmission mode (Hi-Performance) */
1134 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_HIGH_PERFOR,
1135 0, port->port_number);
1136 if (err)
1137 return err;
1138
1139 /* Set interface (RS-232) */
1140 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_INTERFACE,
1141 MX_INT_RS232,
1142 port->port_number);
1143 if (err)
1144 return err;
1145
1146 return 0;
1147 }
1148
1149 static int mxuport_alloc_write_urb(struct usb_serial *serial,
1150 struct usb_serial_port *port,
1151 struct usb_serial_port *port0,
1152 int j)
1153 {
1154 struct usb_device *dev = interface_to_usbdev(serial->interface);
1155
1156 set_bit(j, &port->write_urbs_free);
1157 port->write_urbs[j] = usb_alloc_urb(0, GFP_KERNEL);
1158 if (!port->write_urbs[j])
1159 return -ENOMEM;
1160
1161 port->bulk_out_buffers[j] = kmalloc(port0->bulk_out_size, GFP_KERNEL);
1162 if (!port->bulk_out_buffers[j])
1163 return -ENOMEM;
1164
1165 usb_fill_bulk_urb(port->write_urbs[j], dev,
1166 usb_sndbulkpipe(dev, port->bulk_out_endpointAddress),
1167 port->bulk_out_buffers[j],
1168 port->bulk_out_size,
1169 serial->type->write_bulk_callback,
1170 port);
1171 return 0;
1172 }
1173
1174
1175 static int mxuport_alloc_write_urbs(struct usb_serial *serial,
1176 struct usb_serial_port *port,
1177 struct usb_serial_port *port0)
1178 {
1179 int j;
1180 int ret;
1181
1182 for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) {
1183 ret = mxuport_alloc_write_urb(serial, port, port0, j);
1184 if (ret)
1185 return ret;
1186 }
1187 return 0;
1188 }
1189
1190
1191 static int mxuport_attach(struct usb_serial *serial)
1192 {
1193 struct usb_serial_port *port0 = serial->port[0];
1194 struct usb_serial_port *port1 = serial->port[1];
1195 struct usb_serial_port *port;
1196 int err;
1197 int i;
1198 int j;
1199
1200 /*
1201 * Throw away all but the first allocated write URBs so we can
1202 * set them up again to fit the multiplexing scheme.
1203 */
1204 for (i = 1; i < serial->num_bulk_out; ++i) {
1205 port = serial->port[i];
1206 for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) {
1207 usb_free_urb(port->write_urbs[j]);
1208 kfree(port->bulk_out_buffers[j]);
1209 port->write_urbs[j] = NULL;
1210 port->bulk_out_buffers[j] = NULL;
1211 }
1212 port->write_urbs_free = 0;
1213 }
1214
1215 /*
1216 * All write data is sent over the first bulk out endpoint,
1217 * with an added header to indicate the port. Allocate URBs
1218 * for each port to the first bulk out endpoint.
1219 */
1220 for (i = 1; i < serial->num_ports; ++i) {
1221 port = serial->port[i];
1222 port->bulk_out_size = port0->bulk_out_size;
1223 port->bulk_out_endpointAddress =
1224 port0->bulk_out_endpointAddress;
1225
1226 err = mxuport_alloc_write_urbs(serial, port, port0);
1227 if (err)
1228 return err;
1229
1230 port->write_urb = port->write_urbs[0];
1231 port->bulk_out_buffer = port->bulk_out_buffers[0];
1232
1233 /*
1234 * Ensure each port has a fifo. The framework only
1235 * allocates a fifo to ports with a bulk out endpoint,
1236 * where as we need one for every port.
1237 */
1238 if (!kfifo_initialized(&port->write_fifo)) {
1239 err = kfifo_alloc(&port->write_fifo, PAGE_SIZE,
1240 GFP_KERNEL);
1241 if (err)
1242 return err;
1243 }
1244 }
1245
1246 /*
1247 * All data from the ports is received on the first bulk in
1248 * endpoint, with a multiplex header. The second bulk in is
1249 * used for events.
1250 *
1251 * Start to read from the device.
1252 */
1253 err = usb_serial_generic_submit_read_urbs(port0, GFP_KERNEL);
1254 if (err)
1255 return err;
1256
1257 err = usb_serial_generic_submit_read_urbs(port1, GFP_KERNEL);
1258 if (err) {
1259 usb_serial_generic_close(port0);
1260 return err;
1261 }
1262
1263 return 0;
1264 }
1265
1266 static int mxuport_open(struct tty_struct *tty, struct usb_serial_port *port)
1267 {
1268 struct mxuport_port *mxport = usb_get_serial_port_data(port);
1269 struct usb_serial *serial = port->serial;
1270 int err;
1271
1272 /* Set receive host (enable) */
1273 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN,
1274 1, port->port_number);
1275 if (err)
1276 return err;
1277
1278 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_OPEN,
1279 1, port->port_number);
1280 if (err) {
1281 mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN,
1282 0, port->port_number);
1283 return err;
1284 }
1285
1286 /* Initial port termios */
1287 mxuport_set_termios(tty, port, NULL);
1288
1289 /*
1290 * TODO: use RQ_VENDOR_GET_MSR, once we know what it
1291 * returns.
1292 */
1293 mxport->msr_state = 0;
1294
1295 return err;
1296 }
1297
1298 static void mxuport_close(struct usb_serial_port *port)
1299 {
1300 struct usb_serial *serial = port->serial;
1301
1302 mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_OPEN, 0,
1303 port->port_number);
1304
1305 mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN, 0,
1306 port->port_number);
1307 }
1308
1309 /* Send a break to the port. */
1310 static void mxuport_break_ctl(struct tty_struct *tty, int break_state)
1311 {
1312 struct usb_serial_port *port = tty->driver_data;
1313 struct usb_serial *serial = port->serial;
1314 int enable;
1315
1316 if (break_state == -1) {
1317 enable = 1;
1318 dev_dbg(&port->dev, "%s - sending break\n", __func__);
1319 } else {
1320 enable = 0;
1321 dev_dbg(&port->dev, "%s - clearing break\n", __func__);
1322 }
1323
1324 mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_BREAK,
1325 enable, port->port_number);
1326 }
1327
1328 static int mxuport_resume(struct usb_serial *serial)
1329 {
1330 struct usb_serial_port *port;
1331 int c = 0;
1332 int i;
1333 int r;
1334
1335 for (i = 0; i < 2; i++) {
1336 port = serial->port[i];
1337
1338 r = usb_serial_generic_submit_read_urbs(port, GFP_NOIO);
1339 if (r < 0)
1340 c++;
1341 }
1342
1343 for (i = 0; i < serial->num_ports; i++) {
1344 port = serial->port[i];
1345 if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags))
1346 continue;
1347
1348 r = usb_serial_generic_write_start(port, GFP_NOIO);
1349 if (r < 0)
1350 c++;
1351 }
1352
1353 return c ? -EIO : 0;
1354 }
1355
1356 static struct usb_serial_driver mxuport_device = {
1357 .driver = {
1358 .owner = THIS_MODULE,
1359 .name = "mxuport",
1360 },
1361 .description = "MOXA UPort",
1362 .id_table = mxuport_idtable,
1363 .num_ports = 0,
1364 .probe = mxuport_probe,
1365 .port_probe = mxuport_port_probe,
1366 .attach = mxuport_attach,
1367 .calc_num_ports = mxuport_calc_num_ports,
1368 .open = mxuport_open,
1369 .close = mxuport_close,
1370 .set_termios = mxuport_set_termios,
1371 .break_ctl = mxuport_break_ctl,
1372 .tx_empty = mxuport_tx_empty,
1373 .tiocmiwait = usb_serial_generic_tiocmiwait,
1374 .get_icount = usb_serial_generic_get_icount,
1375 .throttle = mxuport_throttle,
1376 .unthrottle = mxuport_unthrottle,
1377 .tiocmget = mxuport_tiocmget,
1378 .tiocmset = mxuport_tiocmset,
1379 .dtr_rts = mxuport_dtr_rts,
1380 .process_read_urb = mxuport_process_read_urb,
1381 .prepare_write_buffer = mxuport_prepare_write_buffer,
1382 .resume = mxuport_resume,
1383 };
1384
1385 static struct usb_serial_driver *const serial_drivers[] = {
1386 &mxuport_device, NULL
1387 };
1388
1389 module_usb_serial_driver(serial_drivers, mxuport_idtable);
1390
1391 MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch>");
1392 MODULE_AUTHOR("<support@moxa.com>");
1393 MODULE_LICENSE("GPL");
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