2 * mxuport.c - MOXA UPort series driver
4 * Copyright (c) 2006 Moxa Technologies Co., Ltd.
5 * Copyright (c) 2013 Andrew Lunn <andrew@lunn.ch>
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.
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
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>
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
46 /* Definitions for USB info */
48 #define EVENT_LENGTH 8
49 #define DOWN_BLOCK_SIZE 64
51 /* Definitions for firmware info */
52 #define VER_ADDR_1 0x20
53 #define VER_ADDR_2 0x24
54 #define VER_ADDR_3 0x28
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 */
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 */
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 */
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 */
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 */
89 #define RQ_VENDOR_RESET_DEVICE 0x23 /* Try to reset the device */
90 #define RQ_VENDOR_QUERY_FW_CONFIG 0x24
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 */
96 #define RQ_VENDOR_GET_INQUEUE 0x84 /* Data in input buffer */
97 #define RQ_VENDOR_GET_OUTQUEUE 0x85 /* Data in output buffer */
99 #define RQ_VENDOR_GET_MSR 0x86 /* Get modem status register */
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 */
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 */
114 /* Definitions for modem control event type */
115 #define SERIAL_EV_XOFF 0x40 /* XOFF received */
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
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
129 #define MX_STOP_BITS_1 0
130 #define MX_STOP_BITS_1_5 1
131 #define MX_STOP_BITS_2 2
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*/
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
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
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)
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 */
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 */
189 MODULE_DEVICE_TABLE(usb, mxuport_idtable);
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
196 static int mxuport_prepare_write_buffer(struct usb_serial_port *port,
197 void *dest, size_t size)
202 count = kfifo_out_locked(&port->write_fifo, buf + HEADER_SIZE,
206 put_unaligned_be16(port->port_number, buf);
207 put_unaligned_be16(count, buf + 2);
209 dev_dbg(&port->dev, "%s - size %zd count %d\n", __func__,
212 return count + HEADER_SIZE;
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)
222 status = usb_control_msg(serial->dev,
223 usb_rcvctrlpipe(serial->dev, 0),
225 (USB_DIR_IN | USB_TYPE_VENDOR |
226 USB_RECIP_DEVICE), value, index,
228 USB_CTRL_GET_TIMEOUT);
230 dev_err(&serial->interface->dev,
231 "%s - usb_control_msg failed (%d)\n",
236 if (status != size) {
237 dev_err(&serial->interface->dev,
238 "%s - short read (%d / %zd)\n",
239 __func__, status, size);
246 /* Write the given buffer out to the control pipe. */
247 static int mxuport_send_ctrl_data_urb(struct usb_serial *serial,
249 u16 value, u16 index,
250 u8 *data, size_t size)
254 status = usb_control_msg(serial->dev,
255 usb_sndctrlpipe(serial->dev, 0),
257 (USB_DIR_OUT | USB_TYPE_VENDOR |
258 USB_RECIP_DEVICE), value, index,
260 USB_CTRL_SET_TIMEOUT);
262 dev_err(&serial->interface->dev,
263 "%s - usb_control_msg failed (%d)\n",
268 if (status != size) {
269 dev_err(&serial->interface->dev,
270 "%s - short write (%d / %zd)\n",
271 __func__, status, size);
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)
282 return mxuport_send_ctrl_data_urb(serial, request, value, index,
287 * mxuport_throttle - throttle function of driver
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
295 static void mxuport_throttle(struct tty_struct *tty)
297 struct usb_serial_port *port = tty->driver_data;
298 struct usb_serial *serial = port->serial;
300 dev_dbg(&port->dev, "%s\n", __func__);
302 mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN,
303 0, port->port_number);
307 * mxuport_unthrottle - unthrottle function of driver
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.
313 static void mxuport_unthrottle(struct tty_struct *tty)
316 struct usb_serial_port *port = tty->driver_data;
317 struct usb_serial *serial = port->serial;
319 dev_dbg(&port->dev, "%s\n", __func__);
321 mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN,
322 1, port->port_number);
326 * Processes one chunk of data received for a port. Mostly a copy of
327 * usb_serial_generic_process_read_urb().
329 static void mxuport_process_read_urb_data(struct usb_serial_port *port,
330 char *data, int size)
334 if (!port->port.console || !port->sysrq) {
335 tty_insert_flip_string(&port->port, data, size);
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,
343 tty_flip_buffer_push(&port->port);
346 static void mxuport_msr_event(struct usb_serial_port *port, u8 buf[4])
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);
353 if (rcv_msr_event == 0)
356 /* Update MSR status */
357 spin_lock_irqsave(&mxport->spinlock, flags);
359 dev_dbg(&port->dev, "%s - current MSR status = 0x%x\n",
360 __func__, mxport->msr_state);
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__);
366 mxport->msr_state &= ~UART_MSR_CTS;
367 dev_dbg(&port->dev, "%s - CTS low\n", __func__);
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__);
374 mxport->msr_state &= ~UART_MSR_DSR;
375 dev_dbg(&port->dev, "%s - DSR low\n", __func__);
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__);
382 mxport->msr_state &= ~UART_MSR_DCD;
383 dev_dbg(&port->dev, "%s - DCD low\n", __func__);
385 spin_unlock_irqrestore(&mxport->spinlock, flags);
388 (SERIAL_EV_CTS | SERIAL_EV_DSR | SERIAL_EV_RLSD)) {
390 if (rcv_msr_event & SERIAL_EV_CTS) {
392 dev_dbg(&port->dev, "%s - CTS change\n", __func__);
395 if (rcv_msr_event & SERIAL_EV_DSR) {
397 dev_dbg(&port->dev, "%s - DSR change\n", __func__);
400 if (rcv_msr_event & SERIAL_EV_RLSD) {
402 dev_dbg(&port->dev, "%s - DCD change\n", __func__);
404 wake_up_interruptible(&port->port.delta_msr_wait);
408 static void mxuport_lsr_event(struct usb_serial_port *port, u8 buf[4])
410 u8 lsr_event = buf[2];
412 if (lsr_event & UART_LSR_BI) {
414 dev_dbg(&port->dev, "%s - break error\n", __func__);
417 if (lsr_event & UART_LSR_FE) {
418 port->icount.frame++;
419 dev_dbg(&port->dev, "%s - frame error\n", __func__);
422 if (lsr_event & UART_LSR_PE) {
423 port->icount.parity++;
424 dev_dbg(&port->dev, "%s - parity error\n", __func__);
427 if (lsr_event & UART_LSR_OE) {
428 port->icount.overrun++;
429 dev_dbg(&port->dev, "%s - overrun error\n", __func__);
434 * When something interesting happens, modem control lines XON/XOFF
435 * etc, the device sends an event. Process these events.
437 static void mxuport_process_read_urb_event(struct usb_serial_port *port,
438 u8 buf[4], u32 event)
440 dev_dbg(&port->dev, "%s - receive event : %04x\n", __func__, event);
443 case UPORT_EVENT_SEND_NEXT:
445 * Sent as part of the flow control on device buffers.
446 * Not currently used.
449 case UPORT_EVENT_MSR:
450 mxuport_msr_event(port, buf);
452 case UPORT_EVENT_LSR:
453 mxuport_lsr_event(port, buf);
455 case UPORT_EVENT_MCR:
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.
465 dev_dbg(&port->dev, "Unexpected event\n");
471 * One URB can contain data for multiple ports. Demultiplex the data,
472 * checking the port exists, is opened and the message is valid.
474 static void mxuport_process_read_urb_demux_data(struct urb *urb)
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;
486 if (data + HEADER_SIZE > end) {
487 dev_warn(&port->dev, "%s - message with short header\n",
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",
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__);
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);
510 dev_dbg(&demux_port->dev, "%s - data for closed port\n",
513 data += HEADER_SIZE + rcv_len;
518 * One URB can contain events for multiple ports. Demultiplex the event,
519 * checking the port exists, and is opened.
521 static void mxuport_process_read_urb_demux_event(struct urb *urb)
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;
533 if (data + EVENT_LENGTH > end) {
534 dev_warn(&port->dev, "%s - message with short event\n",
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",
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,
553 dev_dbg(&demux_port->dev,
554 "%s - event for closed port\n", __func__);
556 data += EVENT_LENGTH;
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.
565 static void mxuport_process_read_urb(struct urb *urb)
567 struct usb_serial_port *port = urb->context;
568 struct usb_serial *serial = port->serial;
570 if (port == serial->port[0])
571 mxuport_process_read_urb_demux_data(urb);
573 if (port == serial->port[1])
574 mxuport_process_read_urb_demux_event(urb);
578 * Ask the device how many bytes it has queued to be sent out. If
579 * there are none, return true.
581 static bool mxuport_tx_empty(struct usb_serial_port *port)
583 struct usb_serial *serial = port->serial;
584 bool is_empty = true;
589 len_buf = kzalloc(4, GFP_KERNEL);
593 err = mxuport_recv_ctrl_urb(serial, RQ_VENDOR_GET_OUTQUEUE, 0,
594 port->port_number, len_buf, 4);
598 txlen = get_unaligned_be32(len_buf);
599 dev_dbg(&port->dev, "%s - tx len = %u\n", __func__, txlen);
609 static int mxuport_set_mcr(struct usb_serial_port *port, u8 mcr_state)
611 struct usb_serial *serial = port->serial;
614 dev_dbg(&port->dev, "%s - %02x\n", __func__, mcr_state);
616 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_MCR,
617 mcr_state, port->port_number);
619 dev_err(&port->dev, "%s - failed to change MCR\n", __func__);
624 static int mxuport_set_dtr(struct usb_serial_port *port, int on)
626 struct mxuport_port *mxport = usb_get_serial_port_data(port);
627 struct usb_serial *serial = port->serial;
630 mutex_lock(&mxport->mutex);
632 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_DTR,
633 !!on, port->port_number);
636 mxport->mcr_state |= UART_MCR_DTR;
638 mxport->mcr_state &= ~UART_MCR_DTR;
641 mutex_unlock(&mxport->mutex);
646 static int mxuport_set_rts(struct usb_serial_port *port, u8 state)
648 struct mxuport_port *mxport = usb_get_serial_port_data(port);
649 struct usb_serial *serial = port->serial;
653 mutex_lock(&mxport->mutex);
654 mcr_state = mxport->mcr_state;
658 mcr_state &= ~UART_MCR_RTS;
661 mcr_state |= UART_MCR_RTS;
665 * Do not update mxport->mcr_state when doing hardware
671 * Should not happen, but somebody might try passing
672 * MX_RTS_NO_CHANGE, which is not valid.
677 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RTS,
678 state, port->port_number);
680 mxport->mcr_state = mcr_state;
683 mutex_unlock(&mxport->mutex);
688 static void mxuport_dtr_rts(struct usb_serial_port *port, int on)
690 struct mxuport_port *mxport = usb_get_serial_port_data(port);
694 mutex_lock(&mxport->mutex);
695 mcr_state = mxport->mcr_state;
698 mcr_state |= (UART_MCR_RTS | UART_MCR_DTR);
700 mcr_state &= ~(UART_MCR_RTS | UART_MCR_DTR);
702 err = mxuport_set_mcr(port, mcr_state);
704 mxport->mcr_state = mcr_state;
706 mutex_unlock(&mxport->mutex);
709 static int mxuport_tiocmset(struct tty_struct *tty, unsigned int set,
712 struct usb_serial_port *port = tty->driver_data;
713 struct mxuport_port *mxport = usb_get_serial_port_data(port);
717 mutex_lock(&mxport->mutex);
718 mcr_state = mxport->mcr_state;
721 mcr_state |= UART_MCR_RTS;
724 mcr_state |= UART_MCR_DTR;
726 if (clear & TIOCM_RTS)
727 mcr_state &= ~UART_MCR_RTS;
729 if (clear & TIOCM_DTR)
730 mcr_state &= ~UART_MCR_DTR;
732 err = mxuport_set_mcr(port, mcr_state);
734 mxport->mcr_state = mcr_state;
736 mutex_unlock(&mxport->mutex);
741 static int mxuport_tiocmget(struct tty_struct *tty)
743 struct mxuport_port *mxport;
744 struct usb_serial_port *port = tty->driver_data;
750 mxport = usb_get_serial_port_data(port);
752 mutex_lock(&mxport->mutex);
753 spin_lock_irqsave(&mxport->spinlock, flags);
755 msr = mxport->msr_state;
756 mcr = mxport->mcr_state;
758 spin_unlock_irqrestore(&mxport->spinlock, flags);
759 mutex_unlock(&mxport->mutex);
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 */
768 dev_dbg(&port->dev, "%s - 0x%04x\n", __func__, result);
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)
778 u8 xon = START_CHAR(tty);
779 u8 xoff = STOP_CHAR(tty);
785 buf = kmalloc(2, GFP_KERNEL);
789 /* S/W flow control settings */
790 if (I_IXOFF(tty) || I_IXON(tty)) {
795 err = mxuport_send_ctrl_data_urb(serial, RQ_VENDOR_SET_CHARS,
796 0, port->port_number,
801 dev_dbg(&port->dev, "%s - XON = 0x%02x, XOFF = 0x%02x\n",
802 __func__, xon, xoff);
807 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_XONXOFF,
808 enable, port->port_number);
812 rts = MX_RTS_NO_CHANGE;
814 /* H/W flow control settings */
816 C_CRTSCTS(tty) != (old_termios->c_cflag & CRTSCTS)) {
824 if (old_termios && (old_termios->c_cflag & CBAUD) == B0) {
825 /* Raise DTR and RTS */
830 mxuport_set_dtr(port, 1);
833 /* Drop DTR and RTS */
834 rts = MX_RTS_DISABLE;
835 mxuport_set_dtr(port, 0);
838 if (rts != MX_RTS_NO_CHANGE)
839 err = mxuport_set_rts(port, rts);
846 static void mxuport_set_termios(struct tty_struct *tty,
847 struct usb_serial_port *port,
848 struct ktermios *old_termios)
850 struct usb_serial *serial = port->serial;
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__);
865 buf = kmalloc(4, GFP_KERNEL);
869 /* Set data bit of termios */
870 switch (C_CSIZE(tty)) {
872 data_bits = MX_WORDLENGTH_5;
875 data_bits = MX_WORDLENGTH_6;
878 data_bits = MX_WORDLENGTH_7;
882 data_bits = MX_WORDLENGTH_8;
886 /* Set parity of termios */
890 parity = MX_PARITY_MARK;
892 parity = MX_PARITY_SPACE;
895 parity = MX_PARITY_ODD;
897 parity = MX_PARITY_EVEN;
900 parity = MX_PARITY_NONE;
903 /* Set stop bit of termios */
905 stop_bits = MX_STOP_BITS_2;
907 stop_bits = MX_STOP_BITS_1;
914 err = mxuport_send_ctrl_data_urb(serial, RQ_VENDOR_SET_LINE,
915 0, port->port_number, buf, 4);
919 err = mxuport_set_termios_flow(tty, old_termios, port, serial);
923 baud = tty_get_baud_rate(tty);
927 /* Note: Little Endian */
928 put_unaligned_le32(baud, buf);
930 err = mxuport_send_ctrl_data_urb(serial, RQ_VENDOR_SET_BAUD,
931 0, port->port_number,
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);
946 * Determine how many ports this device has dynamically. It will be
947 * called after the probe() callback is called, but before attach().
949 static int mxuport_calc_num_ports(struct usb_serial *serial)
951 unsigned long features = (unsigned long)usb_get_serial_data(serial);
953 if (features & MX_UPORT_2_PORT)
955 if (features & MX_UPORT_4_PORT)
957 if (features & MX_UPORT_8_PORT)
959 if (features & MX_UPORT_16_PORT)
965 /* Get the version of the firmware currently running. */
966 static int mxuport_get_fw_version(struct usb_serial *serial, u32 *version)
971 ver_buf = kzalloc(4, GFP_KERNEL);
975 /* Get firmware version from SDRAM */
976 err = mxuport_recv_ctrl_urb(serial, RQ_VENDOR_GET_VERSION, 0, 0,
983 *version = (ver_buf[0] << 16) | (ver_buf[1] << 8) | ver_buf[2];
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)
999 fw_buf = kmalloc(DOWN_BLOCK_SIZE, GFP_KERNEL);
1003 dev_dbg(&serial->interface->dev, "Starting firmware download...\n");
1004 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_START_FW_DOWN, 0, 0);
1010 txlen = min_t(size_t, (fw_p->size - fwidx), DOWN_BLOCK_SIZE);
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);
1016 mxuport_send_ctrl_urb(serial, RQ_VENDOR_STOP_FW_DOWN,
1022 usleep_range(1000, 2000);
1024 } while (fwidx < fw_p->size);
1027 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_STOP_FW_DOWN, 0, 0);
1032 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_QUERY_FW_READY, 0, 0);
1039 static int mxuport_probe(struct usb_serial *serial,
1040 const struct usb_device_id *id)
1042 u16 productid = le16_to_cpu(serial->dev->descriptor.idProduct);
1043 const struct firmware *fw_p = NULL;
1049 /* Load our firmware */
1050 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_QUERY_FW_CONFIG, 0, 0);
1052 mxuport_send_ctrl_urb(serial, RQ_VENDOR_RESET_DEVICE, 0, 0);
1056 err = mxuport_get_fw_version(serial, &version);
1060 dev_dbg(&serial->interface->dev, "Device firmware version v%x.%x.%x\n",
1061 (version & 0xff0000) >> 16,
1062 (version & 0xff00) >> 8,
1065 snprintf(buf, sizeof(buf) - 1, "moxa/moxa-%04x.fw", productid);
1067 err = request_firmware(&fw_p, buf, &serial->interface->dev);
1069 dev_warn(&serial->interface->dev, "Firmware %s not found\n",
1072 /* Use the firmware already in the device */
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);
1086 err = mxuport_get_fw_version(serial, &version);
1092 dev_info(&serial->interface->dev,
1093 "Using device firmware version v%x.%x.%x\n",
1094 (version & 0xff0000) >> 16,
1095 (version & 0xff00) >> 8,
1099 * Contains the features of this hardware. Store away for
1100 * later use, eg, number of ports.
1102 usb_set_serial_data(serial, (void *)id->driver_info);
1105 release_firmware(fw_p);
1110 static int mxuport_port_probe(struct usb_serial_port *port)
1112 struct usb_serial *serial = port->serial;
1113 struct mxuport_port *mxport;
1116 mxport = devm_kzalloc(&port->dev, sizeof(struct mxuport_port),
1121 mutex_init(&mxport->mutex);
1122 spin_lock_init(&mxport->spinlock);
1124 /* Set the port private data */
1125 usb_set_serial_port_data(port, mxport);
1127 /* Set FIFO (Enable) */
1128 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_FIFO_DISABLE,
1129 0, port->port_number);
1133 /* Set transmission mode (Hi-Performance) */
1134 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_HIGH_PERFOR,
1135 0, port->port_number);
1139 /* Set interface (RS-232) */
1140 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_INTERFACE,
1149 static int mxuport_alloc_write_urb(struct usb_serial *serial,
1150 struct usb_serial_port *port,
1151 struct usb_serial_port *port0,
1154 struct usb_device *dev = interface_to_usbdev(serial->interface);
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])
1161 port->bulk_out_buffers[j] = kmalloc(port0->bulk_out_size, GFP_KERNEL);
1162 if (!port->bulk_out_buffers[j])
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,
1175 static int mxuport_alloc_write_urbs(struct usb_serial *serial,
1176 struct usb_serial_port *port,
1177 struct usb_serial_port *port0)
1182 for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) {
1183 ret = mxuport_alloc_write_urb(serial, port, port0, j);
1191 static int mxuport_attach(struct usb_serial *serial)
1193 struct usb_serial_port *port0 = serial->port[0];
1194 struct usb_serial_port *port1 = serial->port[1];
1195 struct usb_serial_port *port;
1201 * Throw away all but the first allocated write URBs so we can
1202 * set them up again to fit the multiplexing scheme.
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;
1212 port->write_urbs_free = 0;
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.
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;
1226 err = mxuport_alloc_write_urbs(serial, port, port0);
1230 port->write_urb = port->write_urbs[0];
1231 port->bulk_out_buffer = port->bulk_out_buffers[0];
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.
1238 if (!kfifo_initialized(&port->write_fifo)) {
1239 err = kfifo_alloc(&port->write_fifo, PAGE_SIZE,
1247 * All data from the ports is received on the first bulk in
1248 * endpoint, with a multiplex header. The second bulk in is
1251 * Start to read from the device.
1253 err = usb_serial_generic_submit_read_urbs(port0, GFP_KERNEL);
1257 err = usb_serial_generic_submit_read_urbs(port1, GFP_KERNEL);
1259 usb_serial_generic_close(port0);
1266 static int mxuport_open(struct tty_struct *tty, struct usb_serial_port *port)
1268 struct mxuport_port *mxport = usb_get_serial_port_data(port);
1269 struct usb_serial *serial = port->serial;
1272 /* Set receive host (enable) */
1273 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN,
1274 1, port->port_number);
1278 err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_OPEN,
1279 1, port->port_number);
1281 mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN,
1282 0, port->port_number);
1286 /* Initial port termios */
1287 mxuport_set_termios(tty, port, NULL);
1290 * TODO: use RQ_VENDOR_GET_MSR, once we know what it
1293 mxport->msr_state = 0;
1298 static void mxuport_close(struct usb_serial_port *port)
1300 struct usb_serial *serial = port->serial;
1302 mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_OPEN, 0,
1305 mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN, 0,
1309 /* Send a break to the port. */
1310 static void mxuport_break_ctl(struct tty_struct *tty, int break_state)
1312 struct usb_serial_port *port = tty->driver_data;
1313 struct usb_serial *serial = port->serial;
1316 if (break_state == -1) {
1318 dev_dbg(&port->dev, "%s - sending break\n", __func__);
1321 dev_dbg(&port->dev, "%s - clearing break\n", __func__);
1324 mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_BREAK,
1325 enable, port->port_number);
1328 static int mxuport_resume(struct usb_serial *serial)
1330 struct usb_serial_port *port;
1335 for (i = 0; i < 2; i++) {
1336 port = serial->port[i];
1338 r = usb_serial_generic_submit_read_urbs(port, GFP_NOIO);
1343 for (i = 0; i < serial->num_ports; i++) {
1344 port = serial->port[i];
1345 if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags))
1348 r = usb_serial_generic_write_start(port, GFP_NOIO);
1353 return c ? -EIO : 0;
1356 static struct usb_serial_driver mxuport_device = {
1358 .owner = THIS_MODULE,
1361 .description = "MOXA UPort",
1362 .id_table = mxuport_idtable,
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,
1385 static struct usb_serial_driver *const serial_drivers[] = {
1386 &mxuport_device, NULL
1389 module_usb_serial_driver(serial_drivers, mxuport_idtable);
1391 MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch>");
1392 MODULE_AUTHOR("<support@moxa.com>");
1393 MODULE_LICENSE("GPL");