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 */ 20 struct 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 */ 48 enum { 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 62 /* 63 * This should be used by drivers which want to register 64 * their own 8250 ports without registering their own 65 * platform device. Using these will make your driver 66 * dependent on the 8250 driver. 67 */ 68 69 struct uart_8250_port { 70 struct uart_port port; 71 struct timer_list timer; /* "no irq" timer */ 72 struct list_head list; /* ports on this IRQ */ 73 unsigned short capabilities; /* port capabilities */ 74 unsigned short bugs; /* port bugs */ 75 unsigned int tx_loadsz; /* transmit fifo load size */ 76 unsigned char acr; 77 unsigned char ier; 78 unsigned char lcr; 79 unsigned char mcr; 80 unsigned char mcr_mask; /* mask of user bits */ 81 unsigned char mcr_force; /* mask of forced bits */ 82 unsigned char cur_iotype; /* Running I/O type */ 83 84 /* 85 * Some bits in registers are cleared on a read, so they must 86 * be saved whenever the register is read but the bits will not 87 * be immediately processed. 88 */ 89 #define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS 90 unsigned char lsr_saved_flags; 91 #define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA 92 unsigned char msr_saved_flags; 93 94 /* 8250 specific callbacks */ 95 int (*dl_read)(struct uart_8250_port *); 96 void (*dl_write)(struct uart_8250_port *, int); 97 }; 98 99 int serial8250_register_8250_port(struct uart_8250_port *); 100 void serial8250_unregister_port(int line); 101 void serial8250_suspend_port(int line); 102 void serial8250_resume_port(int line); 103 104 extern int early_serial_setup(struct uart_port *port); 105 106 extern int serial8250_find_port(struct uart_port *p); 107 extern int serial8250_find_port_for_earlycon(void); 108 extern unsigned int serial8250_early_in(struct uart_port *port, int offset); 109 extern void serial8250_early_out(struct uart_port *port, int offset, int value); 110 extern int setup_early_serial8250_console(char *cmdline); 111 extern void serial8250_do_set_termios(struct uart_port *port, 112 struct ktermios *termios, struct ktermios *old); 113 extern void serial8250_do_pm(struct uart_port *port, unsigned int state, 114 unsigned int oldstate); 115 extern int fsl8250_handle_irq(struct uart_port *port); 116 int serial8250_handle_irq(struct uart_port *port, unsigned int iir); 117 unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr); 118 void serial8250_tx_chars(struct uart_8250_port *up); 119 unsigned int serial8250_modem_status(struct uart_8250_port *up); 120 121 extern void serial8250_set_isa_configurator(void (*v) 122 (int port, struct uart_port *up, 123 unsigned short *capabilities)); 124 125 #endif 126