// SPDX-License-Identifier: GPL-2.0 /* * Based on meson_uart.c, by AMLOGIC, INC. * * Copyright (C) 2014 Carlo Caione <[email protected]> */ #include <linux/clk.h> #include <linux/console.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/serial.h> #include <linux/serial_core.h> #include <linux/tty.h> #include <linux/tty_flip.h> /* Register offsets */ #define AML_UART_WFIFO … #define AML_UART_RFIFO … #define AML_UART_CONTROL … #define AML_UART_STATUS … #define AML_UART_MISC … #define AML_UART_REG5 … /* AML_UART_CONTROL bits */ #define AML_UART_TX_EN … #define AML_UART_RX_EN … #define AML_UART_TWO_WIRE_EN … #define AML_UART_STOP_BIT_LEN_MASK … #define AML_UART_STOP_BIT_1SB … #define AML_UART_STOP_BIT_2SB … #define AML_UART_PARITY_TYPE … #define AML_UART_PARITY_EN … #define AML_UART_TX_RST … #define AML_UART_RX_RST … #define AML_UART_CLEAR_ERR … #define AML_UART_RX_INT_EN … #define AML_UART_TX_INT_EN … #define AML_UART_DATA_LEN_MASK … #define AML_UART_DATA_LEN_8BIT … #define AML_UART_DATA_LEN_7BIT … #define AML_UART_DATA_LEN_6BIT … #define AML_UART_DATA_LEN_5BIT … /* AML_UART_STATUS bits */ #define AML_UART_PARITY_ERR … #define AML_UART_FRAME_ERR … #define AML_UART_TX_FIFO_WERR … #define AML_UART_RX_EMPTY … #define AML_UART_TX_FULL … #define AML_UART_TX_EMPTY … #define AML_UART_XMIT_BUSY … #define AML_UART_ERR … /* AML_UART_MISC bits */ #define AML_UART_XMIT_IRQ(c) … #define AML_UART_RECV_IRQ(c) … /* AML_UART_REG5 bits */ #define AML_UART_BAUD_MASK … #define AML_UART_BAUD_USE … #define AML_UART_BAUD_XTAL … #define AML_UART_BAUD_XTAL_DIV2 … #define AML_UART_PORT_NUM … #define AML_UART_PORT_OFFSET … #define AML_UART_POLL_USEC … #define AML_UART_TIMEOUT_USEC … static struct uart_driver meson_uart_driver_ttyAML; static struct uart_driver meson_uart_driver_ttyS; static struct uart_port *meson_ports[AML_UART_PORT_NUM]; struct meson_uart_data { … }; static void meson_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) { … } static unsigned int meson_uart_get_mctrl(struct uart_port *port) { … } static unsigned int meson_uart_tx_empty(struct uart_port *port) { … } static void meson_uart_stop_tx(struct uart_port *port) { … } static void meson_uart_stop_rx(struct uart_port *port) { … } static void meson_uart_shutdown(struct uart_port *port) { … } static void meson_uart_start_tx(struct uart_port *port) { … } static void meson_receive_chars(struct uart_port *port) { … } static irqreturn_t meson_uart_interrupt(int irq, void *dev_id) { … } static const char *meson_uart_type(struct uart_port *port) { … } /* * This function is called only from probe() using a temporary io mapping * in order to perform a reset before setting up the device. Since the * temporarily mapped region was successfully requested, there can be no * console on this port at this time. Hence it is not necessary for this * function to acquire the port->lock. (Since there is no console on this * port at this time, the port->lock is not initialized yet.) */ static void meson_uart_reset(struct uart_port *port) { … } static int meson_uart_startup(struct uart_port *port) { … } static void meson_uart_change_speed(struct uart_port *port, unsigned long baud) { … } static void meson_uart_set_termios(struct uart_port *port, struct ktermios *termios, const struct ktermios *old) { … } static int meson_uart_verify_port(struct uart_port *port, struct serial_struct *ser) { … } static void meson_uart_release_port(struct uart_port *port) { … } static int meson_uart_request_port(struct uart_port *port) { … } static void meson_uart_config_port(struct uart_port *port, int flags) { … } #ifdef CONFIG_CONSOLE_POLL /* * Console polling routines for writing and reading from the uart while * in an interrupt or debug context (i.e. kgdb). */ static int meson_uart_poll_get_char(struct uart_port *port) { … } static void meson_uart_poll_put_char(struct uart_port *port, unsigned char c) { … } #endif /* CONFIG_CONSOLE_POLL */ static const struct uart_ops meson_uart_ops = …; #ifdef CONFIG_SERIAL_MESON_CONSOLE static void meson_uart_enable_tx_engine(struct uart_port *port) { … } static void meson_console_putchar(struct uart_port *port, unsigned char ch) { … } static void meson_serial_port_write(struct uart_port *port, const char *s, u_int count) { … } static void meson_serial_console_write(struct console *co, const char *s, u_int count) { … } static int meson_serial_console_setup(struct console *co, char *options) { … } #define MESON_SERIAL_CONSOLE(_devname) … MESON_SERIAL_CONSOLE(…); MESON_SERIAL_CONSOLE(…); static void meson_serial_early_console_write(struct console *co, const char *s, u_int count) { … } static int __init meson_serial_early_console_setup(struct earlycon_device *device, const char *opt) { … } OF_EARLYCON_DECLARE(…); OF_EARLYCON_DECLARE(…); #define MESON_SERIAL_CONSOLE_PTR(_devname) … #else #define MESON_SERIAL_CONSOLE_PTR … #endif #define MESON_UART_DRIVER(_devname) … MESON_UART_DRIVER(…); MESON_UART_DRIVER(…); static int meson_uart_probe_clocks(struct platform_device *pdev, struct uart_port *port) { … } static struct uart_driver *meson_uart_current(const struct meson_uart_data *pd) { … } static int meson_uart_probe(struct platform_device *pdev) { … } static void meson_uart_remove(struct platform_device *pdev) { … } static struct meson_uart_data meson_g12a_uart_data = …; static struct meson_uart_data meson_a1_uart_data = …; static struct meson_uart_data meson_s4_uart_data = …; static const struct of_device_id meson_uart_dt_match[] = …; MODULE_DEVICE_TABLE(of, meson_uart_dt_match); static struct platform_driver meson_uart_platform_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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