Edit File: serial_8250.h
/* * linux/include/linux/serial_8250.h * * Copyright (C) 2004 Russell King * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #ifndef _LINUX_SERIAL_8250_H #define _LINUX_SERIAL_8250_H #include <linux/serial_core.h> #include <linux/platform_device.h> /* * This is the platform device platform_data structure */ struct plat_serial8250_port { unsigned long iobase; /* io base address */ void __iomem *membase; /* ioremap cookie or NULL */ resource_size_t mapbase; /* resource base */ unsigned int irq; /* interrupt number */ unsigned long irqflags; /* request_irq flags */ unsigned int uartclk; /* UART clock rate */ void *private_data; unsigned char regshift; /* register shift */ unsigned char iotype; /* UPIO_* */ unsigned char hub6; upf_t flags; /* UPF_* flags */ unsigned int type; /* If UPF_FIXED_TYPE */ unsigned int (*serial_in)(struct uart_port *, int); void (*serial_out)(struct uart_port *, int, int); void (*set_termios)(struct uart_port *, struct ktermios *new, struct ktermios *old); int (*handle_irq)(struct uart_port *); void (*pm)(struct uart_port *, unsigned int state, unsigned old); void (*handle_break)(struct uart_port *); }; /* * Allocate 8250 platform device IDs. Nothing is implied by * the numbering here, except for the legacy entry being -1. */ enum { PLAT8250_DEV_LEGACY = -1, PLAT8250_DEV_PLATFORM, PLAT8250_DEV_PLATFORM1, PLAT8250_DEV_PLATFORM2, PLAT8250_DEV_FOURPORT, PLAT8250_DEV_ACCENT, PLAT8250_DEV_BOCA, PLAT8250_DEV_EXAR_ST16C554, PLAT8250_DEV_HUB6, PLAT8250_DEV_AU1X00, PLAT8250_DEV_SM501, }; struct uart_8250_dma; /* * This should be used by drivers which want to register * their own 8250 ports without registering their own * platform device. Using these will make your driver * dependent on the 8250 driver. */ struct uart_8250_port { struct uart_port port; struct timer_list timer; /* "no irq" timer */ struct list_head list; /* ports on this IRQ */ unsigned short capabilities; /* port capabilities */ unsigned short bugs; /* port bugs */ unsigned int tx_loadsz; /* transmit fifo load size */ unsigned char acr; unsigned char ier; unsigned char lcr; unsigned char mcr; unsigned char mcr_mask; /* mask of user bits */ unsigned char mcr_force; /* mask of forced bits */ unsigned char cur_iotype; /* Running I/O type */ /* * Some bits in registers are cleared on a read, so they must * be saved whenever the register is read but the bits will not * be immediately processed. */ #define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS unsigned char lsr_saved_flags; #define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA unsigned char msr_saved_flags; struct uart_8250_dma *dma; /* 8250 specific callbacks */ int (*dl_read)(struct uart_8250_port *); void (*dl_write)(struct uart_8250_port *, int); }; int serial8250_register_8250_port(struct uart_8250_port *); void serial8250_unregister_port(int line); void serial8250_suspend_port(int line); void serial8250_resume_port(int line); extern int early_serial_setup(struct uart_port *port); extern int serial8250_find_port(struct uart_port *p); extern int serial8250_find_port_for_earlycon(void); extern unsigned int serial8250_early_in(struct uart_port *port, int offset); extern void serial8250_early_out(struct uart_port *port, int offset, int value); extern int setup_early_serial8250_console(char *cmdline); extern void serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old); extern void serial8250_do_pm(struct uart_port *port, unsigned int state, unsigned int oldstate); extern int fsl8250_handle_irq(struct uart_port *port); int serial8250_handle_irq(struct uart_port *port, unsigned int iir); unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr); void serial8250_tx_chars(struct uart_8250_port *up); unsigned int serial8250_modem_status(struct uart_8250_port *up); extern void serial8250_set_isa_configurator(void (*v) (int port, struct uart_port *up, unsigned short *capabilities)); #endif