1042 lines
25 KiB
C
1042 lines
25 KiB
C
/*
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* usb-serial driver for Quatech USB 2 devices
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*
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* Copyright (C) 2012 Bill Pemberton (wfp5p@virginia.edu)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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*
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* These devices all have only 1 bulk in and 1 bulk out that is shared
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* for all serial ports.
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*
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*/
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#include <asm/unaligned.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/serial.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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#include <linux/serial_reg.h>
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#include <linux/uaccess.h>
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/* default urb timeout for usb operations */
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#define QT2_USB_TIMEOUT USB_CTRL_SET_TIMEOUT
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#define QT_OPEN_CLOSE_CHANNEL 0xca
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#define QT_SET_GET_DEVICE 0xc2
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#define QT_SET_GET_REGISTER 0xc0
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#define QT_GET_SET_PREBUF_TRIG_LVL 0xcc
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#define QT_SET_ATF 0xcd
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#define QT_TRANSFER_IN 0xc0
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#define QT_HW_FLOW_CONTROL_MASK 0xc5
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#define QT_SW_FLOW_CONTROL_MASK 0xc6
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#define QT2_BREAK_CONTROL 0xc8
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#define QT2_GET_SET_UART 0xc1
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#define QT2_FLUSH_DEVICE 0xc4
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#define QT2_GET_SET_QMCR 0xe1
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#define QT2_QMCR_RS232 0x40
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#define QT2_QMCR_RS422 0x10
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#define SERIAL_CRTSCTS ((UART_MCR_RTS << 8) | UART_MSR_CTS)
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#define SERIAL_EVEN_PARITY (UART_LCR_PARITY | UART_LCR_EPAR)
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/* status bytes for the device */
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#define QT2_CONTROL_BYTE 0x1b
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#define QT2_LINE_STATUS 0x00 /* following 1 byte is line status */
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#define QT2_MODEM_STATUS 0x01 /* following 1 byte is modem status */
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#define QT2_XMIT_HOLD 0x02 /* following 2 bytes are ?? */
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#define QT2_CHANGE_PORT 0x03 /* following 1 byte is port to change to */
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#define QT2_REC_FLUSH 0x04 /* no following info */
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#define QT2_XMIT_FLUSH 0x05 /* no following info */
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#define QT2_CONTROL_ESCAPE 0xff /* pass through previous 2 control bytes */
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#define MAX_BAUD_RATE 921600
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#define DEFAULT_BAUD_RATE 9600
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#define QT2_READ_BUFFER_SIZE 512 /* size of read buffer */
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#define QT2_WRITE_BUFFER_SIZE 512 /* size of write buffer */
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#define QT2_WRITE_CONTROL_SIZE 5 /* control bytes used for a write */
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#define DRIVER_DESC "Quatech 2nd gen USB to Serial Driver"
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#define USB_VENDOR_ID_QUATECH 0x061d
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#define QUATECH_SSU2_100 0xC120 /* RS232 single port */
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#define QUATECH_DSU2_100 0xC140 /* RS232 dual port */
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#define QUATECH_DSU2_400 0xC150 /* RS232/422/485 dual port */
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#define QUATECH_QSU2_100 0xC160 /* RS232 four port */
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#define QUATECH_QSU2_400 0xC170 /* RS232/422/485 four port */
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#define QUATECH_ESU2_100 0xC1A0 /* RS232 eight port */
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#define QUATECH_ESU2_400 0xC180 /* RS232/422/485 eight port */
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struct qt2_device_detail {
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int product_id;
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int num_ports;
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};
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#define QT_DETAILS(prod, ports) \
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.product_id = (prod), \
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.num_ports = (ports)
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static const struct qt2_device_detail qt2_device_details[] = {
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{QT_DETAILS(QUATECH_SSU2_100, 1)},
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{QT_DETAILS(QUATECH_DSU2_400, 2)},
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{QT_DETAILS(QUATECH_DSU2_100, 2)},
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{QT_DETAILS(QUATECH_QSU2_400, 4)},
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{QT_DETAILS(QUATECH_QSU2_100, 4)},
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{QT_DETAILS(QUATECH_ESU2_400, 8)},
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{QT_DETAILS(QUATECH_ESU2_100, 8)},
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{QT_DETAILS(0, 0)} /* Terminating entry */
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};
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static const struct usb_device_id id_table[] = {
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{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU2_100)},
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{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_100)},
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{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU2_400)},
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{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_100)},
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{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU2_400)},
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{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_100)},
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{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU2_400)},
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{} /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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struct qt2_serial_private {
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unsigned char current_port; /* current port for incoming data */
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struct urb *read_urb; /* shared among all ports */
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char *read_buffer;
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};
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struct qt2_port_private {
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u8 device_port;
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spinlock_t urb_lock;
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bool urb_in_use;
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struct urb *write_urb;
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char *write_buffer;
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spinlock_t lock;
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u8 shadowLSR;
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u8 shadowMSR;
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struct usb_serial_port *port;
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};
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static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch);
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static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch);
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static void qt2_write_bulk_callback(struct urb *urb);
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static void qt2_read_bulk_callback(struct urb *urb);
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static void qt2_release(struct usb_serial *serial)
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{
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struct qt2_serial_private *serial_priv;
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serial_priv = usb_get_serial_data(serial);
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usb_kill_urb(serial_priv->read_urb);
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usb_free_urb(serial_priv->read_urb);
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kfree(serial_priv->read_buffer);
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kfree(serial_priv);
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}
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static inline int calc_baud_divisor(int baudrate)
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{
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int divisor, rem;
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divisor = MAX_BAUD_RATE / baudrate;
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rem = MAX_BAUD_RATE % baudrate;
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/* Round to nearest divisor */
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if (((rem * 2) >= baudrate) && (baudrate != 110))
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divisor++;
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return divisor;
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}
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static inline int qt2_set_port_config(struct usb_device *dev,
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unsigned char port_number,
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u16 baudrate, u16 lcr)
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{
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int divisor = calc_baud_divisor(baudrate);
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u16 index = ((u16) (lcr << 8) | (u16) (port_number));
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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QT2_GET_SET_UART, 0x40,
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divisor, index, NULL, 0, QT2_USB_TIMEOUT);
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}
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static inline int qt2_control_msg(struct usb_device *dev,
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u8 request, u16 data, u16 index)
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{
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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request, 0x40, data, index,
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NULL, 0, QT2_USB_TIMEOUT);
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}
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static inline int qt2_setdevice(struct usb_device *dev, u8 *data)
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{
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u16 x = ((u16) (data[1] << 8) | (u16) (data[0]));
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return qt2_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
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}
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static inline int qt2_getregister(struct usb_device *dev,
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u8 uart,
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u8 reg,
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u8 *data)
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{
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int ret;
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ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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QT_SET_GET_REGISTER, 0xc0, reg,
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uart, data, sizeof(*data), QT2_USB_TIMEOUT);
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if (ret < sizeof(*data)) {
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if (ret >= 0)
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ret = -EIO;
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}
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return ret;
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}
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static inline int qt2_setregister(struct usb_device *dev,
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u8 uart, u8 reg, u16 data)
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{
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u16 value = (data << 8) | reg;
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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QT_SET_GET_REGISTER, 0x40, value, uart,
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NULL, 0, QT2_USB_TIMEOUT);
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}
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static inline int update_mctrl(struct qt2_port_private *port_priv,
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unsigned int set, unsigned int clear)
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{
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struct usb_serial_port *port = port_priv->port;
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struct usb_device *dev = port->serial->dev;
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unsigned urb_value;
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int status;
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if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
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dev_dbg(&port->dev,
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"update_mctrl - DTR|RTS not being set|cleared\n");
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return 0; /* no change */
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}
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clear &= ~set; /* 'set' takes precedence over 'clear' */
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urb_value = 0;
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if (set & TIOCM_DTR)
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urb_value |= UART_MCR_DTR;
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if (set & TIOCM_RTS)
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urb_value |= UART_MCR_RTS;
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status = qt2_setregister(dev, port_priv->device_port, UART_MCR,
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urb_value);
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if (status < 0)
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dev_err(&port->dev,
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"update_mctrl - Error from MODEM_CTRL urb: %i\n",
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status);
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return status;
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}
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static int qt2_calc_num_ports(struct usb_serial *serial)
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{
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struct qt2_device_detail d;
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int i;
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for (i = 0; d = qt2_device_details[i], d.product_id != 0; i++) {
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if (d.product_id == le16_to_cpu(serial->dev->descriptor.idProduct))
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return d.num_ports;
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}
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/* we didn't recognize the device */
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dev_err(&serial->dev->dev,
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"don't know the number of ports, assuming 1\n");
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return 1;
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}
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static void qt2_set_termios(struct tty_struct *tty,
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struct usb_serial_port *port,
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struct ktermios *old_termios)
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{
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struct usb_device *dev = port->serial->dev;
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struct qt2_port_private *port_priv;
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struct ktermios *termios = &tty->termios;
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u16 baud;
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unsigned int cflag = termios->c_cflag;
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u16 new_lcr = 0;
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int status;
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port_priv = usb_get_serial_port_data(port);
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if (cflag & PARENB) {
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if (cflag & PARODD)
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new_lcr |= UART_LCR_PARITY;
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else
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new_lcr |= SERIAL_EVEN_PARITY;
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}
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switch (cflag & CSIZE) {
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case CS5:
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new_lcr |= UART_LCR_WLEN5;
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break;
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case CS6:
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new_lcr |= UART_LCR_WLEN6;
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break;
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case CS7:
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new_lcr |= UART_LCR_WLEN7;
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break;
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default:
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case CS8:
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new_lcr |= UART_LCR_WLEN8;
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break;
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}
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baud = tty_get_baud_rate(tty);
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if (!baud)
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baud = 9600;
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status = qt2_set_port_config(dev, port_priv->device_port, baud,
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new_lcr);
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if (status < 0)
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dev_err(&port->dev, "%s - qt2_set_port_config failed: %i\n",
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__func__, status);
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if (cflag & CRTSCTS)
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status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
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SERIAL_CRTSCTS,
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port_priv->device_port);
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else
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status = qt2_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
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0, port_priv->device_port);
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if (status < 0)
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dev_err(&port->dev, "%s - set HW flow control failed: %i\n",
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__func__, status);
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if (I_IXOFF(tty) || I_IXON(tty)) {
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u16 x = ((u16) (START_CHAR(tty) << 8) | (u16) (STOP_CHAR(tty)));
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status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
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x, port_priv->device_port);
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} else
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status = qt2_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
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0, port_priv->device_port);
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if (status < 0)
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dev_err(&port->dev, "%s - set SW flow control failed: %i\n",
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__func__, status);
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}
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static int qt2_open(struct tty_struct *tty, struct usb_serial_port *port)
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{
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struct usb_serial *serial;
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struct qt2_port_private *port_priv;
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u8 *data;
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u16 device_port;
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int status;
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unsigned long flags;
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device_port = port->port_number;
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serial = port->serial;
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port_priv = usb_get_serial_port_data(port);
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/* set the port to RS232 mode */
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status = qt2_control_msg(serial->dev, QT2_GET_SET_QMCR,
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QT2_QMCR_RS232, device_port);
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if (status < 0) {
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dev_err(&port->dev,
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"%s failed to set RS232 mode for port %i error %i\n",
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__func__, device_port, status);
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return status;
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}
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data = kzalloc(2, GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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/* open the port */
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status = usb_control_msg(serial->dev,
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usb_rcvctrlpipe(serial->dev, 0),
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QT_OPEN_CLOSE_CHANNEL,
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0xc0, 0,
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device_port, data, 2, QT2_USB_TIMEOUT);
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if (status < 2) {
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dev_err(&port->dev, "%s - open port failed %i\n", __func__,
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status);
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if (status >= 0)
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status = -EIO;
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kfree(data);
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return status;
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}
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spin_lock_irqsave(&port_priv->lock, flags);
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port_priv->shadowLSR = data[0];
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port_priv->shadowMSR = data[1];
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spin_unlock_irqrestore(&port_priv->lock, flags);
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kfree(data);
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/* set to default speed and 8bit word size */
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status = qt2_set_port_config(serial->dev, device_port,
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DEFAULT_BAUD_RATE, UART_LCR_WLEN8);
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if (status < 0) {
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dev_err(&port->dev, "%s - initial setup failed (%i)\n",
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__func__, device_port);
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return status;
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}
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port_priv->device_port = (u8) device_port;
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if (tty)
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qt2_set_termios(tty, port, &tty->termios);
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return 0;
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}
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static void qt2_close(struct usb_serial_port *port)
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{
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struct usb_serial *serial;
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struct qt2_port_private *port_priv;
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int i;
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serial = port->serial;
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port_priv = usb_get_serial_port_data(port);
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usb_kill_urb(port_priv->write_urb);
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/* flush the port transmit buffer */
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i = usb_control_msg(serial->dev,
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usb_rcvctrlpipe(serial->dev, 0),
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QT2_FLUSH_DEVICE, 0x40, 1,
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port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
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if (i < 0)
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dev_err(&port->dev, "%s - transmit buffer flush failed: %i\n",
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__func__, i);
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/* flush the port receive buffer */
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i = usb_control_msg(serial->dev,
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usb_rcvctrlpipe(serial->dev, 0),
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QT2_FLUSH_DEVICE, 0x40, 0,
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port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
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if (i < 0)
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dev_err(&port->dev, "%s - receive buffer flush failed: %i\n",
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__func__, i);
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/* close the port */
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i = usb_control_msg(serial->dev,
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usb_sndctrlpipe(serial->dev, 0),
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QT_OPEN_CLOSE_CHANNEL,
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0x40, 0,
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port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
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if (i < 0)
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dev_err(&port->dev, "%s - close port failed %i\n",
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__func__, i);
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}
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static void qt2_disconnect(struct usb_serial *serial)
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{
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struct qt2_serial_private *serial_priv = usb_get_serial_data(serial);
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usb_kill_urb(serial_priv->read_urb);
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}
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static int get_serial_info(struct usb_serial_port *port,
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struct serial_struct __user *retinfo)
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{
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struct serial_struct tmp;
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if (!retinfo)
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return -EFAULT;
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memset(&tmp, 0, sizeof(tmp));
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tmp.line = port->minor;
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tmp.port = 0;
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tmp.irq = 0;
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tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
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tmp.xmit_fifo_size = port->bulk_out_size;
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tmp.baud_base = 9600;
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tmp.close_delay = 5*HZ;
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tmp.closing_wait = 30*HZ;
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if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
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return -EFAULT;
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return 0;
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}
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|
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static int qt2_ioctl(struct tty_struct *tty,
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unsigned int cmd, unsigned long arg)
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{
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struct usb_serial_port *port = tty->driver_data;
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switch (cmd) {
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case TIOCGSERIAL:
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return get_serial_info(port,
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(struct serial_struct __user *)arg);
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default:
|
|
break;
|
|
}
|
|
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
static void qt2_process_status(struct usb_serial_port *port, unsigned char *ch)
|
|
{
|
|
switch (*ch) {
|
|
case QT2_LINE_STATUS:
|
|
qt2_update_lsr(port, ch + 1);
|
|
break;
|
|
case QT2_MODEM_STATUS:
|
|
qt2_update_msr(port, ch + 1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* not needed, kept to document functionality */
|
|
static void qt2_process_xmit_empty(struct usb_serial_port *port,
|
|
unsigned char *ch)
|
|
{
|
|
int bytes_written;
|
|
|
|
bytes_written = (int)(*ch) + (int)(*(ch + 1) << 4);
|
|
}
|
|
|
|
/* not needed, kept to document functionality */
|
|
static void qt2_process_flush(struct usb_serial_port *port, unsigned char *ch)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static void qt2_process_read_urb(struct urb *urb)
|
|
{
|
|
struct usb_serial *serial;
|
|
struct qt2_serial_private *serial_priv;
|
|
struct usb_serial_port *port;
|
|
struct qt2_port_private *port_priv;
|
|
bool escapeflag;
|
|
unsigned char *ch;
|
|
int i;
|
|
unsigned char newport;
|
|
int len = urb->actual_length;
|
|
|
|
if (!len)
|
|
return;
|
|
|
|
ch = urb->transfer_buffer;
|
|
serial = urb->context;
|
|
serial_priv = usb_get_serial_data(serial);
|
|
port = serial->port[serial_priv->current_port];
|
|
port_priv = usb_get_serial_port_data(port);
|
|
|
|
for (i = 0; i < urb->actual_length; i++) {
|
|
ch = (unsigned char *)urb->transfer_buffer + i;
|
|
if ((i <= (len - 3)) &&
|
|
(*ch == QT2_CONTROL_BYTE) &&
|
|
(*(ch + 1) == QT2_CONTROL_BYTE)) {
|
|
escapeflag = false;
|
|
switch (*(ch + 2)) {
|
|
case QT2_LINE_STATUS:
|
|
case QT2_MODEM_STATUS:
|
|
if (i > (len - 4)) {
|
|
dev_warn(&port->dev,
|
|
"%s - status message too short\n",
|
|
__func__);
|
|
break;
|
|
}
|
|
qt2_process_status(port, ch + 2);
|
|
i += 3;
|
|
escapeflag = true;
|
|
break;
|
|
case QT2_XMIT_HOLD:
|
|
if (i > (len - 5)) {
|
|
dev_warn(&port->dev,
|
|
"%s - xmit_empty message too short\n",
|
|
__func__);
|
|
break;
|
|
}
|
|
qt2_process_xmit_empty(port, ch + 3);
|
|
i += 4;
|
|
escapeflag = true;
|
|
break;
|
|
case QT2_CHANGE_PORT:
|
|
if (i > (len - 4)) {
|
|
dev_warn(&port->dev,
|
|
"%s - change_port message too short\n",
|
|
__func__);
|
|
break;
|
|
}
|
|
tty_flip_buffer_push(&port->port);
|
|
|
|
newport = *(ch + 3);
|
|
|
|
if (newport > serial->num_ports) {
|
|
dev_err(&port->dev,
|
|
"%s - port change to invalid port: %i\n",
|
|
__func__, newport);
|
|
break;
|
|
}
|
|
|
|
serial_priv->current_port = newport;
|
|
port = serial->port[serial_priv->current_port];
|
|
port_priv = usb_get_serial_port_data(port);
|
|
i += 3;
|
|
escapeflag = true;
|
|
break;
|
|
case QT2_REC_FLUSH:
|
|
case QT2_XMIT_FLUSH:
|
|
qt2_process_flush(port, ch + 2);
|
|
i += 2;
|
|
escapeflag = true;
|
|
break;
|
|
case QT2_CONTROL_ESCAPE:
|
|
tty_buffer_request_room(&port->port, 2);
|
|
tty_insert_flip_string(&port->port, ch, 2);
|
|
i += 2;
|
|
escapeflag = true;
|
|
break;
|
|
default:
|
|
dev_warn(&port->dev,
|
|
"%s - unsupported command %i\n",
|
|
__func__, *(ch + 2));
|
|
break;
|
|
}
|
|
if (escapeflag)
|
|
continue;
|
|
}
|
|
|
|
tty_buffer_request_room(&port->port, 1);
|
|
tty_insert_flip_string(&port->port, ch, 1);
|
|
}
|
|
|
|
tty_flip_buffer_push(&port->port);
|
|
}
|
|
|
|
static void qt2_write_bulk_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port;
|
|
struct qt2_port_private *port_priv;
|
|
|
|
port = urb->context;
|
|
port_priv = usb_get_serial_port_data(port);
|
|
|
|
spin_lock(&port_priv->urb_lock);
|
|
|
|
port_priv->urb_in_use = false;
|
|
usb_serial_port_softint(port);
|
|
|
|
spin_unlock(&port_priv->urb_lock);
|
|
|
|
}
|
|
|
|
static void qt2_read_bulk_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial *serial = urb->context;
|
|
int status;
|
|
|
|
if (urb->status) {
|
|
dev_warn(&serial->dev->dev,
|
|
"%s - non-zero urb status: %i\n", __func__,
|
|
urb->status);
|
|
return;
|
|
}
|
|
|
|
qt2_process_read_urb(urb);
|
|
|
|
status = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (status != 0)
|
|
dev_err(&serial->dev->dev,
|
|
"%s - resubmit read urb failed: %i\n",
|
|
__func__, status);
|
|
}
|
|
|
|
static int qt2_setup_urbs(struct usb_serial *serial)
|
|
{
|
|
struct usb_serial_port *port0;
|
|
struct qt2_serial_private *serial_priv;
|
|
int status;
|
|
|
|
port0 = serial->port[0];
|
|
|
|
serial_priv = usb_get_serial_data(serial);
|
|
serial_priv->read_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!serial_priv->read_urb)
|
|
return -ENOMEM;
|
|
|
|
usb_fill_bulk_urb(serial_priv->read_urb, serial->dev,
|
|
usb_rcvbulkpipe(serial->dev,
|
|
port0->bulk_in_endpointAddress),
|
|
serial_priv->read_buffer,
|
|
QT2_READ_BUFFER_SIZE,
|
|
qt2_read_bulk_callback, serial);
|
|
|
|
status = usb_submit_urb(serial_priv->read_urb, GFP_KERNEL);
|
|
if (status != 0) {
|
|
dev_err(&serial->dev->dev,
|
|
"%s - submit read urb failed %i\n", __func__, status);
|
|
usb_free_urb(serial_priv->read_urb);
|
|
return status;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int qt2_attach(struct usb_serial *serial)
|
|
{
|
|
struct qt2_serial_private *serial_priv;
|
|
int status;
|
|
|
|
/* power on unit */
|
|
status = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
|
|
0xc2, 0x40, 0x8000, 0, NULL, 0,
|
|
QT2_USB_TIMEOUT);
|
|
if (status < 0) {
|
|
dev_err(&serial->dev->dev,
|
|
"%s - failed to power on unit: %i\n", __func__, status);
|
|
return status;
|
|
}
|
|
|
|
serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL);
|
|
if (!serial_priv)
|
|
return -ENOMEM;
|
|
|
|
serial_priv->read_buffer = kmalloc(QT2_READ_BUFFER_SIZE, GFP_KERNEL);
|
|
if (!serial_priv->read_buffer) {
|
|
status = -ENOMEM;
|
|
goto err_buf;
|
|
}
|
|
|
|
usb_set_serial_data(serial, serial_priv);
|
|
|
|
status = qt2_setup_urbs(serial);
|
|
if (status != 0)
|
|
goto attach_failed;
|
|
|
|
return 0;
|
|
|
|
attach_failed:
|
|
kfree(serial_priv->read_buffer);
|
|
err_buf:
|
|
kfree(serial_priv);
|
|
return status;
|
|
}
|
|
|
|
static int qt2_port_probe(struct usb_serial_port *port)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct qt2_port_private *port_priv;
|
|
u8 bEndpointAddress;
|
|
|
|
port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL);
|
|
if (!port_priv)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&port_priv->lock);
|
|
spin_lock_init(&port_priv->urb_lock);
|
|
port_priv->port = port;
|
|
|
|
port_priv->write_buffer = kmalloc(QT2_WRITE_BUFFER_SIZE, GFP_KERNEL);
|
|
if (!port_priv->write_buffer)
|
|
goto err_buf;
|
|
|
|
port_priv->write_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!port_priv->write_urb)
|
|
goto err_urb;
|
|
|
|
bEndpointAddress = serial->port[0]->bulk_out_endpointAddress;
|
|
usb_fill_bulk_urb(port_priv->write_urb, serial->dev,
|
|
usb_sndbulkpipe(serial->dev, bEndpointAddress),
|
|
port_priv->write_buffer,
|
|
QT2_WRITE_BUFFER_SIZE,
|
|
qt2_write_bulk_callback, port);
|
|
|
|
usb_set_serial_port_data(port, port_priv);
|
|
|
|
return 0;
|
|
err_urb:
|
|
kfree(port_priv->write_buffer);
|
|
err_buf:
|
|
kfree(port_priv);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static int qt2_port_remove(struct usb_serial_port *port)
|
|
{
|
|
struct qt2_port_private *port_priv;
|
|
|
|
port_priv = usb_get_serial_port_data(port);
|
|
usb_free_urb(port_priv->write_urb);
|
|
kfree(port_priv->write_buffer);
|
|
kfree(port_priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int qt2_tiocmget(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct usb_device *dev = port->serial->dev;
|
|
struct qt2_port_private *port_priv = usb_get_serial_port_data(port);
|
|
u8 *d;
|
|
int r;
|
|
|
|
d = kzalloc(2, GFP_KERNEL);
|
|
if (!d)
|
|
return -ENOMEM;
|
|
|
|
r = qt2_getregister(dev, port_priv->device_port, UART_MCR, d);
|
|
if (r < 0)
|
|
goto mget_out;
|
|
|
|
r = qt2_getregister(dev, port_priv->device_port, UART_MSR, d + 1);
|
|
if (r < 0)
|
|
goto mget_out;
|
|
|
|
r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) |
|
|
(d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) |
|
|
(d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) |
|
|
(d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) |
|
|
(d[1] & UART_MSR_RI ? TIOCM_RI : 0) |
|
|
(d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);
|
|
|
|
mget_out:
|
|
kfree(d);
|
|
return r;
|
|
}
|
|
|
|
static int qt2_tiocmset(struct tty_struct *tty,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct qt2_port_private *port_priv;
|
|
|
|
port_priv = usb_get_serial_port_data(tty->driver_data);
|
|
return update_mctrl(port_priv, set, clear);
|
|
}
|
|
|
|
static void qt2_break_ctl(struct tty_struct *tty, int break_state)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct qt2_port_private *port_priv;
|
|
int status;
|
|
u16 val;
|
|
|
|
port_priv = usb_get_serial_port_data(port);
|
|
|
|
val = (break_state == -1) ? 1 : 0;
|
|
|
|
status = qt2_control_msg(port->serial->dev, QT2_BREAK_CONTROL,
|
|
val, port_priv->device_port);
|
|
if (status < 0)
|
|
dev_warn(&port->dev,
|
|
"%s - failed to send control message: %i\n", __func__,
|
|
status);
|
|
}
|
|
|
|
|
|
|
|
static void qt2_dtr_rts(struct usb_serial_port *port, int on)
|
|
{
|
|
struct usb_device *dev = port->serial->dev;
|
|
struct qt2_port_private *port_priv = usb_get_serial_port_data(port);
|
|
|
|
/* Disable flow control */
|
|
if (!on) {
|
|
if (qt2_setregister(dev, port_priv->device_port,
|
|
UART_MCR, 0) < 0)
|
|
dev_warn(&port->dev, "error from flowcontrol urb\n");
|
|
}
|
|
/* drop RTS and DTR */
|
|
if (on)
|
|
update_mctrl(port_priv, TIOCM_DTR | TIOCM_RTS, 0);
|
|
else
|
|
update_mctrl(port_priv, 0, TIOCM_DTR | TIOCM_RTS);
|
|
}
|
|
|
|
static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch)
|
|
{
|
|
struct qt2_port_private *port_priv;
|
|
u8 newMSR = (u8) *ch;
|
|
unsigned long flags;
|
|
|
|
/* May be called from qt2_process_read_urb() for an unbound port. */
|
|
port_priv = usb_get_serial_port_data(port);
|
|
if (!port_priv)
|
|
return;
|
|
|
|
spin_lock_irqsave(&port_priv->lock, flags);
|
|
port_priv->shadowMSR = newMSR;
|
|
spin_unlock_irqrestore(&port_priv->lock, flags);
|
|
|
|
if (newMSR & UART_MSR_ANY_DELTA) {
|
|
/* update input line counters */
|
|
if (newMSR & UART_MSR_DCTS)
|
|
port->icount.cts++;
|
|
if (newMSR & UART_MSR_DDSR)
|
|
port->icount.dsr++;
|
|
if (newMSR & UART_MSR_DDCD)
|
|
port->icount.dcd++;
|
|
if (newMSR & UART_MSR_TERI)
|
|
port->icount.rng++;
|
|
|
|
wake_up_interruptible(&port->port.delta_msr_wait);
|
|
}
|
|
}
|
|
|
|
static void qt2_update_lsr(struct usb_serial_port *port, unsigned char *ch)
|
|
{
|
|
struct qt2_port_private *port_priv;
|
|
struct async_icount *icount;
|
|
unsigned long flags;
|
|
u8 newLSR = (u8) *ch;
|
|
|
|
/* May be called from qt2_process_read_urb() for an unbound port. */
|
|
port_priv = usb_get_serial_port_data(port);
|
|
if (!port_priv)
|
|
return;
|
|
|
|
if (newLSR & UART_LSR_BI)
|
|
newLSR &= (u8) (UART_LSR_OE | UART_LSR_BI);
|
|
|
|
spin_lock_irqsave(&port_priv->lock, flags);
|
|
port_priv->shadowLSR = newLSR;
|
|
spin_unlock_irqrestore(&port_priv->lock, flags);
|
|
|
|
icount = &port->icount;
|
|
|
|
if (newLSR & UART_LSR_BRK_ERROR_BITS) {
|
|
|
|
if (newLSR & UART_LSR_BI)
|
|
icount->brk++;
|
|
|
|
if (newLSR & UART_LSR_OE)
|
|
icount->overrun++;
|
|
|
|
if (newLSR & UART_LSR_PE)
|
|
icount->parity++;
|
|
|
|
if (newLSR & UART_LSR_FE)
|
|
icount->frame++;
|
|
}
|
|
|
|
}
|
|
|
|
static int qt2_write_room(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct qt2_port_private *port_priv;
|
|
unsigned long flags = 0;
|
|
int r;
|
|
|
|
port_priv = usb_get_serial_port_data(port);
|
|
|
|
spin_lock_irqsave(&port_priv->urb_lock, flags);
|
|
|
|
if (port_priv->urb_in_use)
|
|
r = 0;
|
|
else
|
|
r = QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE;
|
|
|
|
spin_unlock_irqrestore(&port_priv->urb_lock, flags);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int qt2_write(struct tty_struct *tty,
|
|
struct usb_serial_port *port,
|
|
const unsigned char *buf, int count)
|
|
{
|
|
struct qt2_port_private *port_priv;
|
|
struct urb *write_urb;
|
|
unsigned char *data;
|
|
unsigned long flags;
|
|
int status;
|
|
int bytes_out = 0;
|
|
|
|
port_priv = usb_get_serial_port_data(port);
|
|
|
|
if (port_priv->write_urb == NULL) {
|
|
dev_err(&port->dev, "%s - no output urb\n", __func__);
|
|
return 0;
|
|
}
|
|
write_urb = port_priv->write_urb;
|
|
|
|
count = min(count, QT2_WRITE_BUFFER_SIZE - QT2_WRITE_CONTROL_SIZE);
|
|
|
|
data = write_urb->transfer_buffer;
|
|
spin_lock_irqsave(&port_priv->urb_lock, flags);
|
|
if (port_priv->urb_in_use) {
|
|
dev_err(&port->dev, "qt2_write - urb is in use\n");
|
|
goto write_out;
|
|
}
|
|
|
|
*data++ = QT2_CONTROL_BYTE;
|
|
*data++ = QT2_CONTROL_BYTE;
|
|
*data++ = port_priv->device_port;
|
|
put_unaligned_le16(count, data);
|
|
data += 2;
|
|
memcpy(data, buf, count);
|
|
|
|
write_urb->transfer_buffer_length = count + QT2_WRITE_CONTROL_SIZE;
|
|
|
|
status = usb_submit_urb(write_urb, GFP_ATOMIC);
|
|
if (status == 0) {
|
|
port_priv->urb_in_use = true;
|
|
bytes_out += count;
|
|
}
|
|
|
|
write_out:
|
|
spin_unlock_irqrestore(&port_priv->urb_lock, flags);
|
|
return bytes_out;
|
|
}
|
|
|
|
|
|
static struct usb_serial_driver qt2_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "quatech-serial",
|
|
},
|
|
.description = DRIVER_DESC,
|
|
.id_table = id_table,
|
|
.open = qt2_open,
|
|
.close = qt2_close,
|
|
.write = qt2_write,
|
|
.write_room = qt2_write_room,
|
|
.calc_num_ports = qt2_calc_num_ports,
|
|
.attach = qt2_attach,
|
|
.release = qt2_release,
|
|
.disconnect = qt2_disconnect,
|
|
.port_probe = qt2_port_probe,
|
|
.port_remove = qt2_port_remove,
|
|
.dtr_rts = qt2_dtr_rts,
|
|
.break_ctl = qt2_break_ctl,
|
|
.tiocmget = qt2_tiocmget,
|
|
.tiocmset = qt2_tiocmset,
|
|
.tiocmiwait = usb_serial_generic_tiocmiwait,
|
|
.get_icount = usb_serial_generic_get_icount,
|
|
.ioctl = qt2_ioctl,
|
|
.set_termios = qt2_set_termios,
|
|
};
|
|
|
|
static struct usb_serial_driver *const serial_drivers[] = {
|
|
&qt2_device, NULL
|
|
};
|
|
|
|
module_usb_serial_driver(serial_drivers, id_table);
|
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|