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