uart_bus_at91usart.c revision 266095
1284345Ssjg/*- 2284345Ssjg * Copyright (c) 2005 Olivier Houchard. All rights reserved. 3284345Ssjg * 4284345Ssjg * Redistribution and use in source and binary forms, with or without 5284345Ssjg * modification, are permitted provided that the following conditions 6284345Ssjg * are met: 7284345Ssjg * 1. Redistributions of source code must retain the above copyright 8284345Ssjg * notice, this list of conditions and the following disclaimer. 9284345Ssjg * 2. Redistributions in binary form must reproduce the above copyright 10284345Ssjg * notice, this list of conditions and the following disclaimer in the 11284345Ssjg * documentation and/or other materials provided with the distribution. 12284345Ssjg * 13284345Ssjg * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14284345Ssjg * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15284345Ssjg * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16284345Ssjg * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17284345Ssjg * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18284345Ssjg * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19284345Ssjg * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20284345Ssjg * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21284345Ssjg * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26#include "opt_uart.h" 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD: stable/10/sys/arm/at91/uart_bus_at91usart.c 266095 2014-05-14 23:17:33Z ian $"); 30 31#include <sys/param.h> 32#include <sys/systm.h> 33#include <sys/bus.h> 34#include <sys/conf.h> 35#include <sys/kernel.h> 36#include <sys/module.h> 37#include <machine/bus.h> 38#include <sys/rman.h> 39#include <machine/resource.h> 40 41#include <dev/uart/uart.h> 42#include <dev/uart/uart_bus.h> 43#include <dev/uart/uart_cpu.h> 44 45#include <arm/at91/at91var.h> 46 47#include "uart_if.h" 48 49static int usart_at91_probe(device_t dev); 50 51static device_method_t usart_at91_methods[] = { 52 /* Device interface */ 53 DEVMETHOD(device_probe, usart_at91_probe), 54 DEVMETHOD(device_attach, uart_bus_attach), 55 DEVMETHOD(device_detach, uart_bus_detach), 56 { 0, 0 } 57}; 58 59static driver_t usart_at91_driver = { 60 uart_driver_name, 61 usart_at91_methods, 62 sizeof(struct uart_softc), 63}; 64 65extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs; 66 67static int 68usart_at91_probe(device_t dev) 69{ 70 struct uart_softc *sc; 71 72 sc = device_get_softc(dev); 73 switch (device_get_unit(dev)) 74 { 75 case 0: 76 device_set_desc(dev, "DBGU"); 77 /* 78 * Setting sc_sysdev makes this device a 'system device' and 79 * indirectly makes it the system console. 80 */ 81 sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs); 82 bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas)); 83 break; 84 case 1: 85 device_set_desc(dev, "USART0"); 86 break; 87 case 2: 88 device_set_desc(dev, "USART1"); 89 break; 90 case 3: 91 device_set_desc(dev, "USART2"); 92 break; 93 case 4: 94 device_set_desc(dev, "USART3"); 95 break; 96 case 5: 97 device_set_desc(dev, "USART4"); 98 break; 99 case 6: 100 device_set_desc(dev, "USART5"); 101 break; 102 } 103 sc->sc_class = &at91_usart_class; 104 if (sc->sc_class->uc_rclk == 0) 105 sc->sc_class->uc_rclk = at91_master_clock; 106 return (uart_bus_probe(dev, 0, 0, 0, device_get_unit(dev))); 107} 108 109 110DRIVER_MODULE(uart, atmelarm, usart_at91_driver, uart_devclass, 0, 0); 111