// SPDX-License-Identifier: GPL-2.0+ /* * mxuport.c - MOXA UPort series driver * * Copyright (c) 2006 Moxa Technologies Co., Ltd. * Copyright (c) 2013 Andrew Lunn <[email protected]> * * Supports the following Moxa USB to serial converters: * 2 ports : UPort 1250, UPort 1250I * 4 ports : UPort 1410, UPort 1450, UPort 1450I * 8 ports : UPort 1610-8, UPort 1650-8 * 16 ports : UPort 1610-16, UPort 1650-16 */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/firmware.h> #include <linux/jiffies.h> #include <linux/serial.h> #include <linux/serial_reg.h> #include <linux/slab.h> #include <linux/tty.h> #include <linux/tty_driver.h> #include <linux/tty_flip.h> #include <linux/uaccess.h> #include <linux/usb.h> #include <linux/usb/serial.h> #include <asm/unaligned.h> /* Definitions for the vendor ID and device ID */ #define MX_USBSERIAL_VID … #define MX_UPORT1250_PID … #define MX_UPORT1251_PID … #define MX_UPORT1410_PID … #define MX_UPORT1450_PID … #define MX_UPORT1451_PID … #define MX_UPORT1618_PID … #define MX_UPORT1658_PID … #define MX_UPORT1613_PID … #define MX_UPORT1653_PID … /* Definitions for USB info */ #define HEADER_SIZE … #define EVENT_LENGTH … #define DOWN_BLOCK_SIZE … /* Definitions for firmware info */ #define VER_ADDR_1 … #define VER_ADDR_2 … #define VER_ADDR_3 … /* Definitions for USB vendor request */ #define RQ_VENDOR_NONE … #define RQ_VENDOR_SET_BAUD … #define RQ_VENDOR_SET_LINE … #define RQ_VENDOR_SET_CHARS … #define RQ_VENDOR_SET_RTS … #define RQ_VENDOR_SET_DTR … #define RQ_VENDOR_SET_XONXOFF … #define RQ_VENDOR_SET_RX_HOST_EN … #define RQ_VENDOR_SET_OPEN … #define RQ_VENDOR_PURGE … #define RQ_VENDOR_SET_MCR … #define RQ_VENDOR_SET_BREAK … #define RQ_VENDOR_START_FW_DOWN … #define RQ_VENDOR_STOP_FW_DOWN … #define RQ_VENDOR_QUERY_FW_READY … #define RQ_VENDOR_SET_FIFO_DISABLE … #define RQ_VENDOR_SET_INTERFACE … #define RQ_VENDOR_SET_HIGH_PERFOR … #define RQ_VENDOR_ERASE_BLOCK … #define RQ_VENDOR_WRITE_PAGE … #define RQ_VENDOR_PREPARE_WRITE … #define RQ_VENDOR_CONFIRM_WRITE … #define RQ_VENDOR_LOCATE … #define RQ_VENDOR_START_ROM_DOWN … #define RQ_VENDOR_ROM_DATA … #define RQ_VENDOR_STOP_ROM_DOWN … #define RQ_VENDOR_FW_DATA … #define RQ_VENDOR_RESET_DEVICE … #define RQ_VENDOR_QUERY_FW_CONFIG … #define RQ_VENDOR_GET_VERSION … #define RQ_VENDOR_GET_PAGE … #define RQ_VENDOR_GET_ROM_PROC … #define RQ_VENDOR_GET_INQUEUE … #define RQ_VENDOR_GET_OUTQUEUE … #define RQ_VENDOR_GET_MSR … /* Definitions for UPort event type */ #define UPORT_EVENT_NONE … #define UPORT_EVENT_TXBUF_THRESHOLD … #define UPORT_EVENT_SEND_NEXT … #define UPORT_EVENT_MSR … #define UPORT_EVENT_LSR … #define UPORT_EVENT_MCR … /* Definitions for serial event type */ #define SERIAL_EV_CTS … #define SERIAL_EV_DSR … #define SERIAL_EV_RLSD … /* Definitions for modem control event type */ #define SERIAL_EV_XOFF … /* Definitions for line control of communication */ #define MX_WORDLENGTH_5 … #define MX_WORDLENGTH_6 … #define MX_WORDLENGTH_7 … #define MX_WORDLENGTH_8 … #define MX_PARITY_NONE … #define MX_PARITY_ODD … #define MX_PARITY_EVEN … #define MX_PARITY_MARK … #define MX_PARITY_SPACE … #define MX_STOP_BITS_1 … #define MX_STOP_BITS_1_5 … #define MX_STOP_BITS_2 … #define MX_RTS_DISABLE … #define MX_RTS_ENABLE … #define MX_RTS_HW … #define MX_RTS_NO_CHANGE … #define MX_INT_RS232 … #define MX_INT_2W_RS485 … #define MX_INT_RS422 … #define MX_INT_4W_RS485 … /* Definitions for holding reason */ #define MX_WAIT_FOR_CTS … #define MX_WAIT_FOR_DSR … #define MX_WAIT_FOR_DCD … #define MX_WAIT_FOR_XON … #define MX_WAIT_FOR_START_TX … #define MX_WAIT_FOR_UNTHROTTLE … #define MX_WAIT_FOR_LOW_WATER … #define MX_WAIT_FOR_SEND_NEXT … #define MX_UPORT_2_PORT … #define MX_UPORT_4_PORT … #define MX_UPORT_8_PORT … #define MX_UPORT_16_PORT … /* This structure holds all of the local port information */ struct mxuport_port { … }; /* Table of devices that work with this driver */ static const struct usb_device_id mxuport_idtable[] = …; MODULE_DEVICE_TABLE(usb, mxuport_idtable); /* * Add a four byte header containing the port number and the number of * bytes of data in the message. Return the number of bytes in the * buffer. */ static int mxuport_prepare_write_buffer(struct usb_serial_port *port, void *dest, size_t size) { … } /* Read the given buffer in from the control pipe. */ static int mxuport_recv_ctrl_urb(struct usb_serial *serial, u8 request, u16 value, u16 index, u8 *data, size_t size) { … } /* Write the given buffer out to the control pipe. */ static int mxuport_send_ctrl_data_urb(struct usb_serial *serial, u8 request, u16 value, u16 index, u8 *data, size_t size) { … } /* Send a vendor request without any data */ static int mxuport_send_ctrl_urb(struct usb_serial *serial, u8 request, u16 value, u16 index) { … } /* * mxuport_throttle - throttle function of driver * * This function is called by the tty driver when it wants to stop the * data being read from the port. Since all the data comes over one * bulk in endpoint, we cannot stop submitting urbs by setting * port->throttle. Instead tell the device to stop sending us data for * the port. */ static void mxuport_throttle(struct tty_struct *tty) { … } /* * mxuport_unthrottle - unthrottle function of driver * * This function is called by the tty driver when it wants to resume * the data being read from the port. Tell the device it can resume * sending us received data from the port. */ static void mxuport_unthrottle(struct tty_struct *tty) { … } /* * Processes one chunk of data received for a port. Mostly a copy of * usb_serial_generic_process_read_urb(). */ static void mxuport_process_read_urb_data(struct usb_serial_port *port, char *data, int size) { … } static void mxuport_msr_event(struct usb_serial_port *port, u8 buf[4]) { … } static void mxuport_lsr_event(struct usb_serial_port *port, u8 buf[4]) { … } /* * When something interesting happens, modem control lines XON/XOFF * etc, the device sends an event. Process these events. */ static void mxuport_process_read_urb_event(struct usb_serial_port *port, u8 buf[4], u32 event) { … } /* * One URB can contain data for multiple ports. Demultiplex the data, * checking the port exists, is opened and the message is valid. */ static void mxuport_process_read_urb_demux_data(struct urb *urb) { … } /* * One URB can contain events for multiple ports. Demultiplex the event, * checking the port exists, and is opened. */ static void mxuport_process_read_urb_demux_event(struct urb *urb) { … } /* * This is called when we have received data on the bulk in * endpoint. Depending on which port it was received on, it can * contain serial data or events. */ static void mxuport_process_read_urb(struct urb *urb) { … } /* * Ask the device how many bytes it has queued to be sent out. If * there are none, return true. */ static bool mxuport_tx_empty(struct usb_serial_port *port) { … } static int mxuport_set_mcr(struct usb_serial_port *port, u8 mcr_state) { … } static int mxuport_set_dtr(struct usb_serial_port *port, int on) { … } static int mxuport_set_rts(struct usb_serial_port *port, u8 state) { … } static void mxuport_dtr_rts(struct usb_serial_port *port, int on) { … } static int mxuport_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear) { … } static int mxuport_tiocmget(struct tty_struct *tty) { … } static int mxuport_set_termios_flow(struct tty_struct *tty, const struct ktermios *old_termios, struct usb_serial_port *port, struct usb_serial *serial) { … } static void mxuport_set_termios(struct tty_struct *tty, struct usb_serial_port *port, const struct ktermios *old_termios) { … } /* * Determine how many ports this device has dynamically. It will be * called after the probe() callback is called, but before attach(). */ static int mxuport_calc_num_ports(struct usb_serial *serial, struct usb_serial_endpoints *epds) { … } /* Get the version of the firmware currently running. */ static int mxuport_get_fw_version(struct usb_serial *serial, u32 *version) { … } /* Given a firmware blob, download it to the device. */ static int mxuport_download_fw(struct usb_serial *serial, const struct firmware *fw_p) { … } static int mxuport_probe(struct usb_serial *serial, const struct usb_device_id *id) { … } static int mxuport_port_probe(struct usb_serial_port *port) { … } static int mxuport_attach(struct usb_serial *serial) { … } static void mxuport_release(struct usb_serial *serial) { … } static int mxuport_open(struct tty_struct *tty, struct usb_serial_port *port) { … } static void mxuport_close(struct usb_serial_port *port) { … } /* Send a break to the port. */ static int mxuport_break_ctl(struct tty_struct *tty, int break_state) { … } static int mxuport_resume(struct usb_serial *serial) { … } static struct usb_serial_driver mxuport_device = …; static struct usb_serial_driver *const serial_drivers[] = …; module_usb_serial_driver(…); MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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