uart_cpu_sparc64.c revision 119866
1/* 2 * Copyright (c) 2003 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_sparc64.c 119866 2003-09-07 21:51:03Z marcel $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32 33#include <machine/bus.h> 34#include <machine/bus_private.h> 35 36#include <dev/ofw/openfirm.h> 37#include <machine/ofw_machdep.h> 38 39#include <dev/uart/uart.h> 40#include <dev/uart/uart_cpu.h> 41 42static struct bus_space_tag bst_store[3]; 43 44static int 45uart_cpu_channel(char *dev) 46{ 47 char alias[64]; 48 phandle_t aliases; 49 int len; 50 51 strcpy(alias, dev); 52 if ((aliases = OF_finddevice("/aliases")) != -1) 53 OF_getprop(aliases, dev, alias, sizeof(alias)); 54 len = strlen(alias); 55 if (len < 2 || alias[len - 2] != ':' || alias[len - 1] < 'a' || 56 alias[len - 1] > 'b') 57 return (0); 58 return (alias[len - 1] - 'a'); 59} 60 61bus_addr_t 62uart_cpu_busaddr(struct uart_bas *bas) 63{ 64 65 return (bas->bsh); 66} 67 68int 69uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 70{ 71 72 return ((b1->bsh == b2->bsh) ? 1 : 0); 73} 74 75int 76uart_cpu_getdev(int devtype, struct uart_devinfo *di) 77{ 78 char buf[32], dev[32]; 79 phandle_t input, options, output; 80 bus_addr_t addr; 81 int baud, bits, ch, error, space, stop; 82 char flag, par; 83 84 /* 85 * Get the address of the UART that is selected as the console, if 86 * the console is an UART of course. Note that we enforce that both 87 * stdin and stdout are selected. For weird configurations, use 88 * ofw_console(4). 89 * Note that the currently active console (ie /chosen/stdout and 90 * /chosen/stdin) may not be the same as the device selected in the 91 * environment (ie /options/output-device and /options/input-device) 92 * because the user may have changed the environment. In that case 93 * I would assume that the user expects that FreeBSD uses the new 94 * console setting. There's choice choice, really. 95 */ 96 if ((options = OF_finddevice("/options")) == -1) 97 return (ENXIO); 98 if (OF_getprop(options, "input-device", dev, sizeof(dev)) == -1) 99 return (ENXIO); 100 if ((input = OF_finddevice(dev)) == -1) 101 return (ENXIO); 102 if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 103 return (ENXIO); 104 if (strcmp(buf, "serial")) 105 return (ENODEV); 106 if (devtype == UART_DEV_KEYBOARD) { 107 if (OF_getprop(input, "keyboard", buf, sizeof(buf)) == -1) 108 return (ENXIO); 109 } else if (devtype == UART_DEV_CONSOLE) { 110 if (OF_getprop(options, "output-device", buf, sizeof(buf)) 111 == -1) 112 return (ENXIO); 113 if ((output = OF_finddevice(buf)) == -1) 114 return (ENXIO); 115 if (input != output) 116 return (ENXIO); 117 } else 118 return (ENODEV); 119 120 error = OF_decode_addr(input, &space, &addr); 121 if (error) 122 return (error); 123 124 /* Get the device class. */ 125 if (OF_getprop(input, "name", buf, sizeof(buf)) == -1) 126 return (ENXIO); 127 di->bas.regshft = 0; 128 di->bas.rclk = 0; 129 if (!strcmp(buf, "se")) { 130 di->ops = uart_sab82532_ops; 131 addr += 64 * uart_cpu_channel(dev); 132 } else if (!strcmp(buf, "zs")) { 133 di->ops = uart_z8530_ops; 134 di->bas.regshft = 1; 135 ch = uart_cpu_channel(dev); 136 addr += 4 - 4 * ch; 137 } else if (!strcmp(buf, "su") || !strcmp(buf, "su_pnp")) 138 di->ops = uart_ns8250_ops; 139 else 140 return (ENXIO); 141 142 /* Fill in the device info. */ 143 di->bas.bst = &bst_store[devtype]; 144 di->bas.bsh = sparc64_fake_bustag(space, addr, di->bas.bst); 145 146 /* Get the line settings. */ 147 di->baudrate = 9600; 148 di->databits = 8; 149 di->stopbits = 1; 150 di->parity = UART_PARITY_NONE; 151 snprintf(buf, sizeof(buf), "%s-mode", dev); 152 if (OF_getprop(options, buf, buf, sizeof(buf)) == -1) 153 return (0); 154 if (sscanf(buf, "%d,%d,%c,%d,%c", &baud, &bits, &par, &stop, &flag) 155 != 5) 156 return (0); 157 di->baudrate = baud; 158 di->databits = bits; 159 di->stopbits = stop; 160 di->parity = (par == 'n') ? UART_PARITY_NONE : 161 (par == 'o') ? UART_PARITY_ODD : UART_PARITY_EVEN; 162 return (0); 163} 164