// SPDX-License-Identifier: GPL-2.0 /* * Prolific PL2303 USB to serial adaptor driver * * Copyright (C) 2001-2007 Greg Kroah-Hartman ([email protected]) * Copyright (C) 2003 IBM Corp. * * Original driver for 2.2.x by anonymous * * See Documentation/usb/usb-serial.rst for more information on using this * driver */ #include <linux/kernel.h> #include <linux/errno.h> #include <linux/slab.h> #include <linux/tty.h> #include <linux/tty_driver.h> #include <linux/tty_flip.h> #include <linux/serial.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/spinlock.h> #include <linux/uaccess.h> #include <linux/usb.h> #include <linux/usb/serial.h> #include <asm/unaligned.h> #include "pl2303.h" #define PL2303_QUIRK_UART_STATE_IDX0 … #define PL2303_QUIRK_LEGACY … #define PL2303_QUIRK_ENDPOINT_HACK … static const struct usb_device_id id_table[] = …; MODULE_DEVICE_TABLE(usb, id_table); #define SET_LINE_REQUEST_TYPE … #define SET_LINE_REQUEST … #define SET_CONTROL_REQUEST_TYPE … #define SET_CONTROL_REQUEST … #define CONTROL_DTR … #define CONTROL_RTS … #define BREAK_REQUEST_TYPE … #define BREAK_REQUEST … #define BREAK_ON … #define BREAK_OFF … #define GET_LINE_REQUEST_TYPE … #define GET_LINE_REQUEST … #define VENDOR_WRITE_REQUEST_TYPE … #define VENDOR_WRITE_REQUEST … #define VENDOR_WRITE_NREQUEST … #define VENDOR_READ_REQUEST_TYPE … #define VENDOR_READ_REQUEST … #define VENDOR_READ_NREQUEST … #define UART_STATE_INDEX … #define UART_STATE_MSR_MASK … #define UART_STATE_TRANSIENT_MASK … #define UART_DCD … #define UART_DSR … #define UART_BREAK_ERROR … #define UART_RING … #define UART_FRAME_ERROR … #define UART_PARITY_ERROR … #define UART_OVERRUN_ERROR … #define UART_CTS … #define PL2303_FLOWCTRL_MASK … #define PL2303_READ_TYPE_HX_STATUS … #define PL2303_HXN_RESET_REG … #define PL2303_HXN_RESET_UPSTREAM_PIPE … #define PL2303_HXN_RESET_DOWNSTREAM_PIPE … #define PL2303_HXN_FLOWCTRL_REG … #define PL2303_HXN_FLOWCTRL_MASK … #define PL2303_HXN_FLOWCTRL_NONE … #define PL2303_HXN_FLOWCTRL_RTS_CTS … #define PL2303_HXN_FLOWCTRL_XON_XOFF … static int pl2303_set_break(struct usb_serial_port *port, bool enable); enum pl2303_type { … }; struct pl2303_type_data { … }; struct pl2303_serial_private { … }; struct pl2303_private { … }; static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = …; static int pl2303_vendor_read(struct usb_serial *serial, u16 value, unsigned char buf[1]) { … } static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index) { … } static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val) { … } static int pl2303_probe(struct usb_serial *serial, const struct usb_device_id *id) { … } /* * Use interrupt endpoint from first interface if available. * * This is needed due to the looney way its endpoints are set up. */ static int pl2303_endpoint_hack(struct usb_serial *serial, struct usb_serial_endpoints *epds) { … } static int pl2303_calc_num_ports(struct usb_serial *serial, struct usb_serial_endpoints *epds) { … } static bool pl2303_supports_hx_status(struct usb_serial *serial) { … } static int pl2303_detect_type(struct usb_serial *serial) { … } static int pl2303_startup(struct usb_serial *serial) { … } static void pl2303_release(struct usb_serial *serial) { … } static int pl2303_port_probe(struct usb_serial_port *port) { … } static void pl2303_port_remove(struct usb_serial_port *port) { … } static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) { … } /* * Returns the nearest supported baud rate that can be set directly without * using divisors. */ static speed_t pl2303_get_supported_baud_rate(speed_t baud) { … } /* * NOTE: If unsupported baud rates are set directly, the PL2303 seems to * use 9600 baud. */ static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4], speed_t baud) { … } static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4], speed_t baud) { … } static speed_t pl2303_encode_baud_rate_divisor_alt(unsigned char buf[4], speed_t baud) { … } static void pl2303_encode_baud_rate(struct tty_struct *tty, struct usb_serial_port *port, u8 buf[4]) { … } static int pl2303_get_line_request(struct usb_serial_port *port, unsigned char buf[7]) { … } static int pl2303_set_line_request(struct usb_serial_port *port, unsigned char buf[7]) { … } static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b) { … } static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type) { … } static void pl2303_set_termios(struct tty_struct *tty, struct usb_serial_port *port, const struct ktermios *old_termios) { … } static void pl2303_dtr_rts(struct usb_serial_port *port, int on) { … } static void pl2303_close(struct usb_serial_port *port) { … } static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) { … } static int pl2303_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear) { … } static int pl2303_tiocmget(struct tty_struct *tty) { … } static int pl2303_carrier_raised(struct usb_serial_port *port) { … } static int pl2303_set_break(struct usb_serial_port *port, bool enable) { … } static int pl2303_break_ctl(struct tty_struct *tty, int state) { … } static void pl2303_update_line_status(struct usb_serial_port *port, unsigned char *data, unsigned int actual_length) { … } static void pl2303_read_int_callback(struct urb *urb) { … } static void pl2303_process_read_urb(struct urb *urb) { … } static struct usb_serial_driver pl2303_device = …; static struct usb_serial_driver * const serial_drivers[] = …; module_usb_serial_driver(…); MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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