1 /* 2 * Copyright (c) 2003, 2004 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 bus_space_tag_t uart_bus_space_io; 43 bus_space_tag_t uart_bus_space_mem; 44 45 static phandle_t uart_cpu_getdev_keyboard(phandle_t root); 46 47 static struct bus_space_tag bst_store[3]; 48 49 static int 50 uart_cpu_channel(char *dev) 51 { 52 char alias[64]; 53 phandle_t aliases; 54 int len; 55 56 strcpy(alias, dev); 57 if ((aliases = OF_finddevice("/aliases")) != -1) 58 OF_getprop(aliases, dev, alias, sizeof(alias)); 59 len = strlen(alias); 60 if (len < 2 || alias[len - 2] != ':' || alias[len - 1] < 'a' || 61 alias[len - 1] > 'b') 62 return (0); 63 return (alias[len - 1] - 'a' + 1); 64 } 65 66 int 67 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 68 { 69 70 return ((b1->bsh == b2->bsh) ? 1 : 0); 71 } 72 73 static phandle_t 74 uart_cpu_getdev_keyboard(phandle_t root) 75 { 76 phandle_t child; 77 phandle_t node; 78 char buf[32]; 79 80 for (child = OF_child(root); child != 0 && child != -1; 81 child = OF_peer(child)) { 82 if (OF_getprop(child, "device_type", buf, sizeof(buf)) != -1 && 83 !strcmp(buf, "serial") && 84 OF_getprop(child, "keyboard", buf, sizeof(buf)) != -1) 85 return (child); 86 if ((node = uart_cpu_getdev_keyboard(child)) != -1) 87 return (node); 88 } 89 return (-1); 90 } 91 92 int 93 uart_cpu_getdev(int devtype, struct uart_devinfo *di) 94 { 95 char buf[32], dev[32], compat[32]; 96 phandle_t input, options, output; 97 bus_addr_t addr; 98 int baud, bits, error, space, stop; 99 char flag, par; 100 101 /* 102 * Get the address of the UART that is selected as the console, if 103 * the console is an UART of course. Note that we enforce that both 104 * stdin and stdout are selected. For weird configurations, use 105 * ofw_console(4). 106 * Note that the currently active console (ie /chosen/stdout and 107 * /chosen/stdin) may not be the same as the device selected in the 108 * environment (ie /options/output-device and /options/input-device) 109 * because the user may have changed the environment. In that case 110 * I would assume that the user expects that FreeBSD uses the new 111 * console setting. There's choice choice, really. 112 */ 113 if ((options = OF_finddevice("/options")) == -1) 114 return (ENXIO); 115 if (devtype == UART_DEV_CONSOLE) { 116 if (OF_getprop(options, "input-device", dev, sizeof(dev)) == -1) 117 return (ENXIO); 118 if ((input = OF_finddevice(dev)) == -1) 119 return (ENXIO); 120 if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 121 return (ENXIO); 122 if (strcmp(buf, "serial")) 123 return (ENODEV); 124 if (OF_getprop(options, "output-device", buf, sizeof(buf)) 125 == -1) 126 return (ENXIO); 127 if ((output = OF_finddevice(buf)) == -1) 128 return (ENXIO); 129 if (input != output) 130 return (ENXIO); 131 } else if (devtype == UART_DEV_KEYBOARD) { 132 if ((input = uart_cpu_getdev_keyboard(OF_peer(0))) == -1) 133 return (ENXIO); 134 } else 135 return (ENODEV); 136 137 error = OF_decode_addr(input, &space, &addr); 138 if (error) 139 return (error); 140 141 /* Get the device class. */ 142 if (OF_getprop(input, "name", buf, sizeof(buf)) == -1) 143 return (ENXIO); 144 if (OF_getprop(input, "compatible", compat, sizeof(compat)) == -1) 145 compat[0] = '\0'; 146 di->bas.regshft = 0; 147 di->bas.rclk = 0; 148 if (!strcmp(buf, "se")) { 149 di->ops = uart_sab82532_ops; 150 di->bas.chan = uart_cpu_channel(dev); 151 addr += 64 * (di->bas.chan - 1); 152 } else if (!strcmp(buf, "zs")) { 153 di->ops = uart_z8530_ops; 154 di->bas.chan = uart_cpu_channel(dev); 155 di->bas.regshft = 1; 156 addr += 4 - 4 * (di->bas.chan - 1); 157 } else if (!strcmp(buf, "su") || !strcmp(buf, "su_pnp") || 158 !strcmp(compat, "su") || !strcmp(compat, "su16550")) { 159 di->ops = uart_ns8250_ops; 160 di->bas.chan = 0; 161 } else 162 return (ENXIO); 163 164 /* Fill in the device info. */ 165 di->bas.bst = &bst_store[devtype]; 166 di->bas.bsh = sparc64_fake_bustag(space, addr, di->bas.bst); 167 168 /* Get the line settings. */ 169 if (devtype == UART_DEV_KEYBOARD) 170 di->baudrate = 1200; 171 else 172 di->baudrate = 9600; 173 di->databits = 8; 174 di->stopbits = 1; 175 di->parity = UART_PARITY_NONE; 176 snprintf(buf, sizeof(buf), "%s-mode", dev); 177 if (OF_getprop(options, buf, buf, sizeof(buf)) == -1) 178 return (0); 179 if (sscanf(buf, "%d,%d,%c,%d,%c", &baud, &bits, &par, &stop, &flag) 180 != 5) 181 return (0); 182 di->baudrate = baud; 183 di->databits = bits; 184 di->stopbits = stop; 185 di->parity = (par == 'n') ? UART_PARITY_NONE : 186 (par == 'o') ? UART_PARITY_ODD : UART_PARITY_EVEN; 187 return (0); 188 } 189