uart_cpu_powerpc.c revision 195831
1/*- 2 * Copyright (c) 2006 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 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/dev/uart/uart_cpu_powerpc.c 195831 2009-07-23 12:51:27Z nwhitehorn $"); 29 30#include "opt_platform.h" 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <vm/vm.h> 35#include <vm/pmap.h> 36 37#include <machine/bus.h> 38 39#ifndef MPC85XX 40#include <dev/ofw/openfirm.h> 41#include <machine/ofw_machdep.h> 42#endif 43 44#include <dev/uart/uart.h> 45#include <dev/uart/uart_cpu.h> 46 47#ifdef MPC85XX 48bus_space_tag_t uart_bus_space_io = &bs_be_tag; 49bus_space_tag_t uart_bus_space_mem = &bs_be_tag; 50#else 51bus_space_tag_t uart_bus_space_io = &bs_le_tag; 52bus_space_tag_t uart_bus_space_mem = &bs_le_tag; 53#endif 54 55int 56uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 57{ 58#ifdef MPC85XX 59 return ((b1->bsh == b2->bsh) ? 1 : 0); 60#else 61 return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0); 62#endif 63} 64 65#ifdef MPC85XX 66int 67uart_cpu_getdev(int devtype, struct uart_devinfo *di) 68{ 69 struct uart_class *class; 70 71 class = &uart_ns8250_class; 72 if (class == NULL) 73 class = &uart_quicc_class; 74 if (class == NULL) 75 return (ENXIO); 76 77 /* Check the environment. */ 78 return (uart_getenv(devtype, di, class)); 79} 80#else 81static int 82ofw_get_uart_console(phandle_t opts, phandle_t *result, const char *inputdev, 83 const char *outputdev) 84{ 85 char buf[64]; 86 phandle_t input; 87 88 if (OF_getprop(opts, inputdev, buf, sizeof(buf)) == -1) 89 return (ENXIO); 90 input = OF_finddevice(buf); 91 if (input == -1) 92 return (ENXIO); 93 if (OF_getprop(opts, outputdev, buf, sizeof(buf)) == -1) 94 return (ENXIO); 95 if (OF_finddevice(buf) != input) 96 return (ENXIO); 97 98 *result = input; 99 return (0); 100} 101 102int 103uart_cpu_getdev(int devtype, struct uart_devinfo *di) 104{ 105 char buf[64]; 106 struct uart_class *class; 107 phandle_t input, opts; 108 int error; 109 110 class = &uart_z8530_class; 111 if (class == NULL) 112 return (ENXIO); 113 114 if ((opts = OF_finddevice("/options")) == -1) 115 return (ENXIO); 116 switch (devtype) { 117 case UART_DEV_CONSOLE: 118 if (ofw_get_uart_console(opts, &input, "input-device", 119 "output-device")) { 120 /* 121 * At least some G5 Xserves require that we 122 * probe input-device-1 as well 123 */ 124 125 if (ofw_get_uart_console(opts, &input, "input-device-1", 126 "output-device-1")) 127 return (ENXIO); 128 } 129 break; 130 case UART_DEV_DBGPORT: 131 if (!getenv_string("hw.uart.dbgport", buf, sizeof(buf))) 132 return (ENXIO); 133 input = OF_finddevice(buf); 134 if (input == -1) 135 return (ENXIO); 136 break; 137 default: 138 return (EINVAL); 139 } 140 141 if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 142 return (ENXIO); 143 if (strcmp(buf, "serial") != 0) 144 return (ENXIO); 145 if (OF_getprop(input, "name", buf, sizeof(buf)) == -1) 146 return (ENXIO); 147 148 if (strcmp(buf, "ch-a") == 0) { 149 class = &uart_z8530_class; 150 di->bas.regshft = 4; 151 di->bas.chan = 1; 152 } else if (strcmp(buf,"serial") == 0) { 153 class = &uart_ns8250_class; 154 di->bas.regshft = 0; 155 di->bas.chan = 0; 156 } else 157 return (ENXIO); 158 159 error = OF_decode_addr(input, 0, &di->bas.bst, &di->bas.bsh); 160 if (error) 161 return (error); 162 163 di->ops = uart_getops(class); 164 165 if (OF_getprop(input, "clock-frequency", &di->bas.rclk, 166 sizeof(di->bas.rclk)) == -1) 167 di->bas.rclk = 230400; 168 if (OF_getprop(input, "current-speed", &di->baudrate, 169 sizeof(di->baudrate)) == -1) 170 di->baudrate = 0; 171 172 di->databits = 8; 173 di->stopbits = 1; 174 di->parity = UART_PARITY_NONE; 175 return (0); 176} 177#endif 178