uart_cpu_sparc64.c revision 119815
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 119815 2003-09-06 23:13:47Z 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 61int 62uart_cpu_getdev(int devtype, struct uart_devinfo *di) 63{ 64 char buf[32], dev[32]; 65 phandle_t input, options, output; 66 bus_addr_t addr; 67 int baud, bits, ch, error, space, stop; 68 char flag, par; 69 70 /* 71 * Get the address of the UART that is selected as the console, if 72 * the console is an UART of course. Note that we enforce that both 73 * stdin and stdout are selected. For weird configurations, use 74 * ofw_console(4). 75 * Note that the currently active console (ie /chosen/stdout and 76 * /chosen/stdin) may not be the same as the device selected in the 77 * environment (ie /options/output-device and /options/input-device) 78 * because the user may have changed the environment. In that case 79 * I would assume that the user expects that FreeBSD uses the new 80 * console setting. There's choice choice, really. 81 */ 82 if ((options = OF_finddevice("/options")) == -1) 83 return (ENXIO); 84 if (OF_getprop(options, "input-device", dev, sizeof(dev)) == -1) 85 return (ENXIO); 86 if ((input = OF_finddevice(dev)) == -1) 87 return (ENXIO); 88 if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 89 return (ENXIO); 90 if (strcmp(buf, "serial")) 91 return (ENODEV); 92 if (devtype == UART_DEV_KEYBOARD) { 93 if (OF_getprop(input, "keyboard", buf, sizeof(buf)) == -1) 94 return (ENXIO); 95 } else if (devtype == UART_DEV_CONSOLE) { 96 if (OF_getprop(options, "output-device", buf, sizeof(buf)) 97 == -1) 98 return (ENXIO); 99 if ((output = OF_finddevice(buf)) == -1) 100 return (ENXIO); 101 if (input != output) 102 return (ENXIO); 103 } else 104 return (ENODEV); 105 106 error = OF_decode_addr(input, &space, &addr); 107 if (error) 108 return (error); 109 110 /* Get the device class. */ 111 if (OF_getprop(input, "name", buf, sizeof(buf)) == -1) 112 return (ENXIO); 113 di->bas.regshft = 0; 114 di->bas.rclk = 0; 115 if (!strcmp(buf, "se")) { 116 di->ops = uart_sab82532_ops; 117 addr += 64 * uart_cpu_channel(dev); 118 } else if (!strcmp(buf, "zs")) { 119 di->ops = uart_z8530_ops; 120 di->bas.regshft = 1; 121 ch = uart_cpu_channel(dev); 122 addr += 4 - 4 * ch; 123 } else if (!strcmp(buf, "su") || !strcmp(buf, "su_pnp")) 124 di->ops = uart_ns8250_ops; 125 else 126 return (ENXIO); 127 128 /* Fill in the device info. */ 129 di->bas.bst = &bst_store[devtype]; 130 di->bas.bsh = sparc64_fake_bustag(space, addr, di->bas.bst); 131 132 /* Get the line settings. */ 133 di->baudrate = 9600; 134 di->databits = 8; 135 di->stopbits = 1; 136 di->parity = UART_PARITY_NONE; 137 snprintf(buf, sizeof(buf), "%s-mode", dev); 138 if (OF_getprop(options, buf, buf, sizeof(buf)) == -1) 139 return (0); 140 if (sscanf(buf, "%d,%d,%c,%d,%c", &baud, &bits, &par, &stop, &flag) 141 != 5) 142 return (0); 143 di->baudrate = baud; 144 di->databits = bits; 145 di->stopbits = stop; 146 di->parity = (par == 'n') ? UART_PARITY_NONE : 147 (par == 'o') ? UART_PARITY_ODD : UART_PARITY_EVEN; 148 return (0); 149} 150 151int 152uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 153{ 154 155 return ((b1->bsh == b2->bsh) ? 1 : 0); 156} 157