uart_bus_at91usart.c revision 155324
1/*- 2 * Copyright (c) 2005 Olivier Houchard. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25#include "opt_uart.h" 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/arm/at91/uart_bus_at91usart.c 155324 2006-02-04 23:32:13Z imp $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/bus.h> 33#include <sys/conf.h> 34#include <sys/kernel.h> 35#include <sys/module.h> 36#include <machine/bus.h> 37#include <sys/rman.h> 38#include <machine/resource.h> 39 40#include <dev/pci/pcivar.h> 41 42#include <dev/uart/uart.h> 43#include <dev/uart/uart_bus.h> 44#include <dev/uart/uart_cpu.h> 45 46#include <arm/at91/at91rm92reg.h> 47 48#include "uart_if.h" 49 50static int usart_at91rm92_probe(device_t dev); 51 52extern struct uart_class at91_usart_class; 53 54static device_method_t usart_at91rm92_methods[] = { 55 /* Device interface */ 56 DEVMETHOD(device_probe, usart_at91rm92_probe), 57 DEVMETHOD(device_attach, uart_bus_attach), 58 DEVMETHOD(device_detach, uart_bus_detach), 59 { 0, 0 } 60}; 61 62static driver_t usart_at91rm92_driver = { 63 uart_driver_name, 64 usart_at91rm92_methods, 65 sizeof(struct uart_softc), 66}; 67 68extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs; 69 70static int 71usart_at91rm92_probe(device_t dev) 72{ 73 struct uart_softc *sc; 74 75 sc = device_get_softc(dev); 76 switch (device_get_unit(dev)) 77 { 78 case 0: 79 device_set_desc(dev, "DBGU"); 80#ifndef USART0_CONSOLE 81 /* 82 * Setting sc_sysdev makes this device a 'system device' and 83 * indirectly makes it the system console. 84 */ 85 sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs); 86 bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas)); 87#endif 88 break; 89 case 1: 90 device_set_desc(dev, "USART0"); 91#ifdef USART0_CONSOLE 92 sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs); 93 bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas)); 94#endif 95 break; 96 case 2: 97 device_set_desc(dev, "USART1"); 98 break; 99 case 3: 100 device_set_desc(dev, "USART2"); 101 break; 102 case 4: 103 device_set_desc(dev, "USART3"); 104 break; 105 } 106 sc->sc_class = &at91_usart_class; 107 return (uart_bus_probe(dev, 0, 0, 0, device_get_unit(dev), 0)); 108} 109 110 111DRIVER_MODULE(uart, atmelarm, usart_at91rm92_driver, uart_devclass, 0, 0); 112