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992 lines
24 KiB
992 lines
24 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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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 ([email protected]) |
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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 < (int)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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struct usb_serial_endpoints *epds) |
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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 tty_struct *tty, |
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struct serial_struct *ss) |
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{ |
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struct usb_serial_port *port = tty->driver_data; |
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ss->line = port->minor; |
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ss->port = 0; |
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ss->irq = 0; |
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ss->xmit_fifo_size = port->bulk_out_size; |
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ss->baud_base = 9600; |
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ss->close_delay = 5*HZ; |
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ss->closing_wait = 30*HZ; |
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return 0; |
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} |
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static void qt2_process_status(struct usb_serial_port *port, unsigned char *ch) |
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{ |
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switch (*ch) { |
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case QT2_LINE_STATUS: |
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qt2_update_lsr(port, ch + 1); |
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break; |
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case QT2_MODEM_STATUS: |
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qt2_update_msr(port, ch + 1); |
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break; |
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} |
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} |
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static void qt2_process_read_urb(struct urb *urb) |
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{ |
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struct usb_serial *serial; |
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struct qt2_serial_private *serial_priv; |
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struct usb_serial_port *port; |
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bool escapeflag; |
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unsigned char *ch; |
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int i; |
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unsigned char newport; |
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int len = urb->actual_length; |
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if (!len) |
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return; |
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ch = urb->transfer_buffer; |
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serial = urb->context; |
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serial_priv = usb_get_serial_data(serial); |
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port = serial->port[serial_priv->current_port]; |
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for (i = 0; i < urb->actual_length; i++) { |
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ch = (unsigned char *)urb->transfer_buffer + i; |
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if ((i <= (len - 3)) && |
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(*ch == QT2_CONTROL_BYTE) && |
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(*(ch + 1) == QT2_CONTROL_BYTE)) { |
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escapeflag = false; |
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switch (*(ch + 2)) { |
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case QT2_LINE_STATUS: |
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case QT2_MODEM_STATUS: |
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if (i > (len - 4)) { |
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dev_warn(&port->dev, |
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"%s - status message too short\n", |
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__func__); |
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break; |
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} |
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qt2_process_status(port, ch + 2); |
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i += 3; |
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escapeflag = true; |
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break; |
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case QT2_XMIT_HOLD: |
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if (i > (len - 5)) { |
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dev_warn(&port->dev, |
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"%s - xmit_empty message too short\n", |
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__func__); |
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break; |
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} |
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/* bytes_written = (ch[1] << 4) + ch[0]; */ |
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i += 4; |
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escapeflag = true; |
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break; |
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case QT2_CHANGE_PORT: |
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if (i > (len - 4)) { |
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dev_warn(&port->dev, |
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"%s - change_port message too short\n", |
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__func__); |
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break; |
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} |
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tty_flip_buffer_push(&port->port); |
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newport = *(ch + 3); |
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if (newport > serial->num_ports) { |
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dev_err(&port->dev, |
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"%s - port change to invalid port: %i\n", |
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__func__, newport); |
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break; |
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} |
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|
serial_priv->current_port = newport; |
|
port = serial->port[serial_priv->current_port]; |
|
i += 3; |
|
escapeflag = true; |
|
break; |
|
case QT2_REC_FLUSH: |
|
case QT2_XMIT_FLUSH: |
|
i += 2; |
|
escapeflag = true; |
|
break; |
|
case QT2_CONTROL_ESCAPE: |
|
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_insert_flip_char(&port->port, *ch, TTY_NORMAL); |
|
} |
|
|
|
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; |
|
unsigned long flags; |
|
|
|
port = urb->context; |
|
port_priv = usb_get_serial_port_data(port); |
|
|
|
spin_lock_irqsave(&port_priv->urb_lock, flags); |
|
|
|
port_priv->urb_in_use = false; |
|
usb_serial_port_softint(port); |
|
|
|
spin_unlock_irqrestore(&port_priv->urb_lock, flags); |
|
|
|
} |
|
|
|
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 void 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); |
|
} |
|
|
|
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, |
|
.get_serial = get_serial_info, |
|
.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 v2");
|
|
|