linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * usb-serial driver for Quatech USB 2 devices

 *

 * Copyright (C) 2012 Bill Pemberton (wfp5p@virginia.edu)

 *

 *  These devices all have only 1 bulk in and 1 bulk out that is shared

 *  for all serial ports.

 *

 */

​

#include <asm/unaligned.h>

#include <linux/errno.h>

#include <linux/slab.h>

#include <linux/tty.h>

#include <linux/tty_driver.h>

#include <linux/tty_flip.h>

#include <linux/module.h>

#include <linux/serial.h>

#include <linux/usb.h>

#include <linux/usb/serial.h>

#include <linux/serial_reg.h>

#include <linux/uaccess.h>

​

/* default urb timeout for usb operations */

#define QT2_USB_TIMEOUT USB_CTRL_SET_TIMEOUT

​

#define QT_OPEN_CLOSE_CHANNEL       0xca

#define QT_SET_GET_DEVICE           0xc2

#define QT_SET_GET_REGISTER         0xc0

#define QT_GET_SET_PREBUF_TRIG_LVL  0xcc

#define QT_SET_ATF                  0xcd

#define QT_TRANSFER_IN              0xc0

#define QT_HW_FLOW_CONTROL_MASK     0xc5

#define QT_SW_FLOW_CONTROL_MASK     0xc6

#define QT2_BREAK_CONTROL       0xc8

#define QT2_GET_SET_UART            0xc1

#define QT2_FLUSH_DEVICE        0xc4

#define QT2_GET_SET_QMCR            0xe1

#define QT2_QMCR_RS232              0x40

#define QT2_QMCR_RS422              0x10

​

#define  SERIAL_CRTSCTS ((UART_MCR_RTS << 8) | UART_MSR_CTS)

​

#define  SERIAL_EVEN_PARITY         (UART_LCR_PARITY | UART_LCR_EPAR)

​

/* status bytes for the device */

#define QT2_CONTROL_BYTE    0x1b

#define QT2_LINE_STATUS     0x00  /* following 1 byte is line status */

#define QT2_MODEM_STATUS    0x01  /* following 1 byte is modem status */

#define QT2_XMIT_HOLD       0x02  /* following 2 bytes are ?? */

#define QT2_CHANGE_PORT     0x03  /* following 1 byte is port to change to */

#define QT2_REC_FLUSH       0x04  /* no following info */

#define QT2_XMIT_FLUSH      0x05  /* no following info */

#define QT2_CONTROL_ESCAPE  0xff  /* pass through previous 2 control bytes */

​

#define  MAX_BAUD_RATE              921600

#define  DEFAULT_BAUD_RATE          9600

​

#define QT2_READ_BUFFER_SIZE    512  /* size of read buffer */

#define QT2_WRITE_BUFFER_SIZE   512  /* size of write buffer */

#define QT2_WRITE_CONTROL_SIZE  5    /* control bytes used for a write */

​

#define DRIVER_DESC "Quatech 2nd gen USB to Serial Driver"

​

#define USB_VENDOR_ID_QUATECH   0x061d

#define QUATECH_SSU2_100    0xC120  /* RS232 single port */

#define QUATECH_DSU2_100    0xC140  /* RS232 dual port */

#define QUATECH_DSU2_400    0xC150  /* RS232/422/485 dual port */

#define QUATECH_QSU2_100    0xC160  /* RS232 four port */

#define QUATECH_QSU2_400    0xC170  /* RS232/422/485 four port */

#define QUATECH_ESU2_100    0xC1A0  /* RS232 eight port */

#define QUATECH_ESU2_400    0xC180  /* RS232/422/485 eight port */

​

struct qt2_device_detail {

    int product_id;

    int num_ports;

};

​

#define QT_DETAILS(prod, ports) \

    .product_id = (prod),   \

    .num_ports = (ports)

​

static const struct qt2_device_detail qt2_device_details[] = {

    {QT_DETAILS(QUATECH_SSU2_100, 1)},

    {QT_DETAILS(QUATECH_DSU2_400, 2)},

    {QT_DETAILS(QUATECH_DSU2_100, 2)},

    {QT_DETAILS(QUATECH_QSU2_400, 4)},

    {QT_DETAILS(QUATECH_QSU2_100, 4)},

    {QT_DETAILS(QUATECH_ESU2_400, 8)},

    {QT_DETAILS(QUATECH_ESU2_100, 8)},

    {QT_DETAILS(0, 0)}  /* Terminating entry */