1/* 2 * linux/include/linux/serial_8250.h 3 * 4 * Copyright (C) 2004 Russell King 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 */ 11#ifndef _LINUX_SERIAL_8250_H 12#define _LINUX_SERIAL_8250_H 13 14#include <linux/serial_core.h> 15#include <linux/platform_device.h> 16 17/* 18 * This is the platform device platform_data structure 19 */ 20struct plat_serial8250_port { 21 unsigned long iobase; /* io base address */ 22 void __iomem *membase; /* ioremap cookie or NULL */ 23 resource_size_t mapbase; /* resource base */ 24 unsigned int irq; /* interrupt number */ 25 unsigned long irqflags; /* request_irq flags */ 26 unsigned int uartclk; /* UART clock rate */ 27 void *private_data; 28 unsigned char regshift; /* register shift */ 29 unsigned char iotype; /* UPIO_* */ 30 unsigned char hub6; 31 upf_t flags; /* UPF_* flags */ 32 unsigned int type; /* If UPF_FIXED_TYPE */ 33 unsigned int (*serial_in)(struct uart_port *, int); 34 void (*serial_out)(struct uart_port *, int, int); 35 void (*set_termios)(struct uart_port *, 36 struct ktermios *new, 37 struct ktermios *old); 38 int (*handle_irq)(struct uart_port *); 39 void (*pm)(struct uart_port *, unsigned int state, 40 unsigned old); 41 void (*handle_break)(struct uart_port *); 42}; 43 44/* 45 * Allocate 8250 platform device IDs. Nothing is implied by 46 * the numbering here, except for the legacy entry being -1. 47 */ 48enum { 49 PLAT8250_DEV_LEGACY = -1, 50 PLAT8250_DEV_PLATFORM, 51 PLAT8250_DEV_PLATFORM1, 52 PLAT8250_DEV_PLATFORM2, 53 PLAT8250_DEV_FOURPORT, 54 PLAT8250_DEV_ACCENT, 55 PLAT8250_DEV_BOCA, 56 PLAT8250_DEV_EXAR_ST16C554, 57 PLAT8250_DEV_HUB6, 58 PLAT8250_DEV_AU1X00, 59 PLAT8250_DEV_SM501, 60}; 61 62struct uart_8250_dma; 63struct uart_8250_port; 64 65/** 66 * 8250 core driver operations 67 * 68 * @setup_irq() Setup irq handling. The universal 8250 driver links this 69 * port to the irq chain. Other drivers may @request_irq(). 70 * @release_irq() Undo irq handling. The universal 8250 driver unlinks 71 * the port from the irq chain. 72 */ 73struct uart_8250_ops { 74 int (*setup_irq)(struct uart_8250_port *); 75 void (*release_irq)(struct uart_8250_port *); 76}; 77 78/* 79 * This should be used by drivers which want to register 80 * their own 8250 ports without registering their own 81 * platform device. Using these will make your driver 82 * dependent on the 8250 driver. 83 */ 84 85struct uart_8250_port { 86 struct uart_port port; 87 struct timer_list timer; /* "no irq" timer */ 88 struct list_head list; /* ports on this IRQ */ 89 unsigned short capabilities; /* port capabilities */ 90 unsigned short bugs; /* port bugs */ 91 bool fifo_bug; /* min RX trigger if enabled */ 92 unsigned int tx_loadsz; /* transmit fifo load size */ 93 unsigned char acr; 94 unsigned char fcr; 95 unsigned char ier; 96 unsigned char lcr; 97 unsigned char mcr; 98 unsigned char mcr_mask; /* mask of user bits */ 99 unsigned char mcr_force; /* mask of forced bits */ 100 unsigned char cur_iotype; /* Running I/O type */ 101 unsigned int rpm_tx_active; 102 unsigned char canary; /* non-zero during system sleep 103 * if no_console_suspend 104 */ 105 unsigned char probe; 106#define UART_PROBE_RSA (1 << 0) 107 108 /* 109 * Some bits in registers are cleared on a read, so they must 110 * be saved whenever the register is read but the bits will not 111 * be immediately processed. 112 */ 113#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS 114 unsigned char lsr_saved_flags; 115#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA 116 unsigned char msr_saved_flags; 117 118 struct uart_8250_dma *dma; 119 const struct uart_8250_ops *ops; 120 121 /* 8250 specific callbacks */ 122 int (*dl_read)(struct uart_8250_port *); 123 void (*dl_write)(struct uart_8250_port *, int); 124}; 125 126static inline struct uart_8250_port *up_to_u8250p(struct uart_port *up) 127{ 128 return container_of(up, struct uart_8250_port, port); 129} 130 131int serial8250_register_8250_port(struct uart_8250_port *); 132void serial8250_unregister_port(int line); 133void serial8250_suspend_port(int line); 134void serial8250_resume_port(int line); 135 136extern int early_serial_setup(struct uart_port *port); 137 138extern unsigned int serial8250_early_in(struct uart_port *port, int offset); 139extern void serial8250_early_out(struct uart_port *port, int offset, int value); 140extern void serial8250_do_set_termios(struct uart_port *port, 141 struct ktermios *termios, struct ktermios *old); 142extern int serial8250_do_startup(struct uart_port *port); 143extern void serial8250_do_shutdown(struct uart_port *port); 144extern void serial8250_do_pm(struct uart_port *port, unsigned int state, 145 unsigned int oldstate); 146extern void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl); 147extern int fsl8250_handle_irq(struct uart_port *port); 148int serial8250_handle_irq(struct uart_port *port, unsigned int iir); 149unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr); 150void serial8250_tx_chars(struct uart_8250_port *up); 151unsigned int serial8250_modem_status(struct uart_8250_port *up); 152 153extern void serial8250_set_isa_configurator(void (*v) 154 (int port, struct uart_port *up, 155 unsigned short *capabilities)); 156 157#endif 158