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 }; 36 37 /* 38 * Allocate 8250 platform device IDs. Nothing is implied by 39 * the numbering here, except for the legacy entry being -1. 40 */ 41 enum { 42 PLAT8250_DEV_LEGACY = -1, 43 PLAT8250_DEV_PLATFORM, 44 PLAT8250_DEV_PLATFORM1, 45 PLAT8250_DEV_PLATFORM2, 46 PLAT8250_DEV_FOURPORT, 47 PLAT8250_DEV_ACCENT, 48 PLAT8250_DEV_BOCA, 49 PLAT8250_DEV_EXAR_ST16C554, 50 PLAT8250_DEV_HUB6, 51 PLAT8250_DEV_MCA, 52 PLAT8250_DEV_AU1X00, 53 PLAT8250_DEV_SM501, 54 }; 55 56 /* 57 * This should be used by drivers which want to register 58 * their own 8250 ports without registering their own 59 * platform device. Using these will make your driver 60 * dependent on the 8250 driver. 61 */ 62 struct uart_port; 63 64 int serial8250_register_port(struct uart_port *); 65 void serial8250_unregister_port(int line); 66 void serial8250_suspend_port(int line); 67 void serial8250_resume_port(int line); 68 69 extern int early_serial_setup(struct uart_port *port); 70 71 extern int serial8250_find_port(struct uart_port *p); 72 extern int serial8250_find_port_for_earlycon(void); 73 extern int setup_early_serial8250_console(char *cmdline); 74 75 #endif 76