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("$FreeBSD$"); 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 42 static phandle_t uart_cpu_getdev_keyboard(phandle_t root); 43 44 static struct bus_space_tag bst_store[3]; 45 46 static int 47 uart_cpu_channel(char *dev) 48 { 49 char alias[64]; 50 phandle_t aliases; 51 int len; 52 53 strcpy(alias, dev); 54 if ((aliases = OF_finddevice("/aliases")) != -1) 55 OF_getprop(aliases, dev, alias, sizeof(alias)); 56 len = strlen(alias); 57 if (len < 2 || alias[len - 2] != ':' || alias[len - 1] < 'a' || 58 alias[len - 1] > 'b') 59 return (0); 60 return (alias[len - 1] - 'a' + 1); 61 } 62 63 int 64 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 65 { 66 67 return ((b1->bsh == b2->bsh) ? 1 : 0); 68 } 69 70 static phandle_t 71 uart_cpu_getdev_keyboard(phandle_t root) 72 { 73 phandle_t child; 74 phandle_t node; 75 char buf[32]; 76 77 for (child = OF_child(root); child != 0 && child != -1; 78 child = OF_peer(child)) { 79 if (OF_getprop(child, "device_type", buf, sizeof(buf)) != -1 && 80 !strcmp(buf, "serial") && 81 OF_getprop(child, "keyboard", buf, sizeof(buf)) != -1) 82 return (child); 83 if ((node = uart_cpu_getdev_keyboard(child)) != -1) 84 return (node); 85 } 86 return (-1); 87 } 88 89 int 90 uart_cpu_getdev(int devtype, struct uart_devinfo *di) 91 { 92 char buf[32], dev[32], compat[32]; 93 phandle_t input, options, output; 94 bus_addr_t addr; 95 int baud, bits, error, space, stop; 96 char flag, par; 97 98 /* 99 * Get the address of the UART that is selected as the console, if 100 * the console is an UART of course. Note that we enforce that both 101 * stdin and stdout are selected. For weird configurations, use 102 * ofw_console(4). 103 * Note that the currently active console (ie /chosen/stdout and 104 * /chosen/stdin) may not be the same as the device selected in the 105 * environment (ie /options/output-device and /options/input-device) 106 * because the user may have changed the environment. In that case 107 * I would assume that the user expects that FreeBSD uses the new 108 * console setting. There's choice choice, really. 109 */ 110 if ((options = OF_finddevice("/options")) == -1) 111 return (ENXIO); 112 if (devtype == UART_DEV_CONSOLE) { 113 if (OF_getprop(options, "input-device", dev, sizeof(dev)) == -1) 114 return (ENXIO); 115 if ((input = OF_finddevice(dev)) == -1) 116 return (ENXIO); 117 if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 118 return (ENXIO); 119 if (strcmp(buf, "serial")) 120 return (ENODEV); 121 if (OF_getprop(options, "output-device", buf, sizeof(buf)) 122 == -1) 123 return (ENXIO); 124 if ((output = OF_finddevice(buf)) == -1) 125 return (ENXIO); 126 if (input != output) 127 return (ENXIO); 128 } else if (devtype == UART_DEV_KEYBOARD) { 129 if ((input = uart_cpu_getdev_keyboard(OF_peer(0))) == -1) 130 return (ENXIO); 131 } else 132 return (ENODEV); 133 134 error = OF_decode_addr(input, &space, &addr); 135 if (error) 136 return (error); 137 138 /* Get the device class. */ 139 if (OF_getprop(input, "name", buf, sizeof(buf)) == -1) 140 return (ENXIO); 141 if (OF_getprop(input, "compatible", compat, sizeof(compat)) == -1) 142 compat[0] = '\0'; 143 di->bas.regshft = 0; 144 di->bas.rclk = 0; 145 if (!strcmp(buf, "se")) { 146 di->ops = uart_sab82532_ops; 147 di->bas.chan = uart_cpu_channel(dev); 148 addr += 64 * (di->bas.chan - 1); 149 } else if (!strcmp(buf, "zs")) { 150 di->ops = uart_z8530_ops; 151 di->bas.chan = uart_cpu_channel(dev); 152 di->bas.regshft = 1; 153 addr += 4 - 4 * (di->bas.chan - 1); 154 } else if (!strcmp(buf, "su") || !strcmp(buf, "su_pnp") || 155 !strcmp(compat, "su") || !strcmp(compat, "su16550")) { 156 di->ops = uart_ns8250_ops; 157 di->bas.chan = 0; 158 } else 159 return (ENXIO); 160 161 /* Fill in the device info. */ 162 di->bas.bst = &bst_store[devtype]; 163 di->bas.bsh = sparc64_fake_bustag(space, addr, di->bas.bst); 164 165 /* Get the line settings. */ 166 if (devtype == UART_DEV_KEYBOARD) 167 di->baudrate = 1200; 168 else 169 di->baudrate = 9600; 170 di->databits = 8; 171 di->stopbits = 1; 172 di->parity = UART_PARITY_NONE; 173 snprintf(buf, sizeof(buf), "%s-mode", dev); 174 if (OF_getprop(options, buf, buf, sizeof(buf)) == -1) 175 return (0); 176 if (sscanf(buf, "%d,%d,%c,%d,%c", &baud, &bits, &par, &stop, &flag) 177 != 5) 178 return (0); 179 di->baudrate = baud; 180 di->databits = bits; 181 di->stopbits = stop; 182 di->parity = (par == 'n') ? UART_PARITY_NONE : 183 (par == 'o') ? UART_PARITY_ODD : UART_PARITY_EVEN; 184 return (0); 185 } 186