uart_cpu.h revision 133735
1/* 2 * Copyright (c) 2003, 2004 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/dev/uart/uart_cpu.h 133735 2004-08-14 23:54:27Z marius $ 27 */ 28 29#ifndef _DEV_UART_CPU_H_ 30#define _DEV_UART_CPU_H_ 31 32/* 33 * Low-level operations for use by console and/or debug port support. 34 */ 35struct uart_ops { 36 int (*probe)(struct uart_bas *); 37 void (*init)(struct uart_bas *, int, int, int, int); 38 void (*term)(struct uart_bas *); 39 void (*putc)(struct uart_bas *, int); 40 int (*poll)(struct uart_bas *); 41 int (*getc)(struct uart_bas *); 42}; 43 44extern struct uart_ops uart_i8251_ops; 45extern struct uart_ops uart_ns8250_ops; 46extern struct uart_ops uart_sab82532_ops; 47extern struct uart_ops uart_z8530_ops; 48 49extern bus_space_tag_t uart_bus_space_io; 50extern bus_space_tag_t uart_bus_space_mem; 51 52/* 53 * Console and debug port device info. 54 */ 55struct uart_softc; 56struct uart_devinfo { 57 SLIST_ENTRY(uart_devinfo) next; 58 struct uart_ops ops; 59 struct uart_bas bas; 60 int baudrate; 61 int databits; 62 int stopbits; 63 int parity; 64 int type; 65#define UART_DEV_CONSOLE 0 66#define UART_DEV_DBGPORT 1 67#define UART_DEV_KEYBOARD 2 68 int (*attach)(struct uart_softc*); 69 int (*detach)(struct uart_softc*); 70 void *cookie; /* Type dependent use. */ 71}; 72 73int uart_cpu_eqres(struct uart_bas *, struct uart_bas *); 74int uart_cpu_getdev(int, struct uart_devinfo *); 75int uart_getenv(int, struct uart_devinfo *); 76 77void uart_add_sysdev(struct uart_devinfo *); 78void uart_cpu_identify(driver_t *, device_t); 79 80/* 81 * Operations for low-level access to the UART. Primarily for use 82 * by console and debug port logic. 83 */ 84static __inline int 85uart_probe(struct uart_devinfo *di) 86{ 87 return (di->ops.probe(&di->bas)); 88} 89 90static __inline void 91uart_init(struct uart_devinfo *di) 92{ 93 di->ops.init(&di->bas, di->baudrate, di->databits, di->stopbits, 94 di->parity); 95} 96 97static __inline void 98uart_term(struct uart_devinfo *di) 99{ 100 di->ops.term(&di->bas); 101} 102 103static __inline void 104uart_putc(struct uart_devinfo *di, int c) 105{ 106 di->ops.putc(&di->bas, c); 107} 108 109static __inline int 110uart_poll(struct uart_devinfo *di) 111{ 112 return (di->ops.poll(&di->bas)); 113} 114 115static __inline int 116uart_getc(struct uart_devinfo *di) 117{ 118 return (di->ops.getc(&di->bas)); 119} 120 121#endif /* _DEV_UART_CPU_H_ */ 122