// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2010 Alexey Charkov <[email protected]> * * Based on msm_serial.c, which is: * Copyright (C) 2007 Google, Inc. * Author: Robert Love <[email protected]> */ #include <linux/hrtimer.h> #include <linux/delay.h> #include <linux/io.h> #include <linux/ioport.h> #include <linux/irq.h> #include <linux/init.h> #include <linux/console.h> #include <linux/platform_device.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/serial_core.h> #include <linux/serial.h> #include <linux/slab.h> #include <linux/clk.h> #include <linux/of.h> #include <linux/err.h> /* * UART Register offsets */ #define VT8500_URTDR … #define VT8500_URRDR … #define VT8500_URDIV … #define VT8500_URLCR … #define VT8500_URICR … #define VT8500_URIER … #define VT8500_URISR … #define VT8500_URUSR … #define VT8500_URFCR … #define VT8500_URFIDX … #define VT8500_URBKR … #define VT8500_URTOD … #define VT8500_TXFIFO … #define VT8500_RXFIFO … /* * Interrupt enable and status bits */ #define TXDE … #define RXDF … #define TXFAE … #define TXFE … #define RXFAF … #define RXFF … #define TXUDR … #define RXOVER … #define PER … #define FER … #define TCTS … #define RXTOUT … #define BKDONE … #define ERR … #define RX_FIFO_INTS … #define TX_FIFO_INTS … /* * Line control bits */ #define VT8500_TXEN … #define VT8500_RXEN … #define VT8500_CS8 … #define VT8500_CSTOPB … #define VT8500_PARENB … #define VT8500_PARODD … #define VT8500_RTS … #define VT8500_LOOPBK … #define VT8500_DMA … #define VT8500_BREAK … #define VT8500_PSLVERR … #define VT8500_SWRTSCTS … /* * Capability flags (driver-internal) */ #define VT8500_HAS_SWRTSCTS_SWITCH … #define VT8500_RECOMMENDED_CLK … #define VT8500_OVERSAMPLING_DIVISOR … #define VT8500_MAX_PORTS … struct vt8500_port { … }; /* * we use this variable to keep track of which ports * have been allocated as we can't use pdev->id in * devicetree */ static DECLARE_BITMAP(vt8500_ports_in_use, VT8500_MAX_PORTS); static inline void vt8500_write(struct uart_port *port, unsigned int val, unsigned int off) { … } static inline unsigned int vt8500_read(struct uart_port *port, unsigned int off) { … } static void vt8500_stop_tx(struct uart_port *port) { … } static void vt8500_stop_rx(struct uart_port *port) { … } static void vt8500_enable_ms(struct uart_port *port) { … } static void handle_rx(struct uart_port *port) { … } static unsigned int vt8500_tx_empty(struct uart_port *port) { … } static void handle_tx(struct uart_port *port) { … } static void vt8500_start_tx(struct uart_port *port) { … } static void handle_delta_cts(struct uart_port *port) { … } static irqreturn_t vt8500_irq(int irq, void *dev_id) { … } static unsigned int vt8500_get_mctrl(struct uart_port *port) { … } static void vt8500_set_mctrl(struct uart_port *port, unsigned int mctrl) { … } static void vt8500_break_ctl(struct uart_port *port, int break_ctl) { … } static int vt8500_set_baud_rate(struct uart_port *port, unsigned int baud) { … } static int vt8500_startup(struct uart_port *port) { … } static void vt8500_shutdown(struct uart_port *port) { … } static void vt8500_set_termios(struct uart_port *port, struct ktermios *termios, const struct ktermios *old) { … } static const char *vt8500_type(struct uart_port *port) { … } static void vt8500_release_port(struct uart_port *port) { … } static int vt8500_request_port(struct uart_port *port) { … } static void vt8500_config_port(struct uart_port *port, int flags) { … } static int vt8500_verify_port(struct uart_port *port, struct serial_struct *ser) { … } static struct vt8500_port *vt8500_uart_ports[VT8500_MAX_PORTS]; static struct uart_driver vt8500_uart_driver; #ifdef CONFIG_SERIAL_VT8500_CONSOLE static void wait_for_xmitr(struct uart_port *port) { … } static void vt8500_console_putchar(struct uart_port *port, unsigned char c) { … } static void vt8500_console_write(struct console *co, const char *s, unsigned int count) { … } static int __init vt8500_console_setup(struct console *co, char *options) { … } static struct console vt8500_console = …; #define VT8500_CONSOLE … #else #define VT8500_CONSOLE … #endif #ifdef CONFIG_CONSOLE_POLL static int vt8500_get_poll_char(struct uart_port *port) { … } static void vt8500_put_poll_char(struct uart_port *port, unsigned char c) { … } #endif static const struct uart_ops vt8500_uart_pops = …; static struct uart_driver vt8500_uart_driver = …; static unsigned int vt8500_flags; /* none required so far */ static unsigned int wm8880_flags = …; static const struct of_device_id wmt_dt_ids[] = …; static int vt8500_serial_probe(struct platform_device *pdev) { … } static struct platform_driver vt8500_platform_driver = …; static int __init vt8500_serial_init(void) { … } device_initcall(vt8500_serial_init);
Codebase Browser
linux