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 "opt_isa.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 35 #include <machine/bus.h> 36 #include <machine/bus_private.h> 37 #include <machine/resource.h> 38 39 #include <dev/ofw/ofw_bus.h> 40 #include <dev/ofw/openfirm.h> 41 #include <machine/ofw_machdep.h> 42 43 #include <isa/isavar.h> 44 45 #include <dev/uart/uart.h> 46 #include <dev/uart/uart_bus.h> 47 #include <dev/uart/uart_cpu.h> 48 49 #include <sparc64/pci/ofw_pci.h> 50 #include <sparc64/isa/ofw_isa.h> 51 52 bus_space_tag_t uart_bus_space_io; 53 bus_space_tag_t uart_bus_space_mem; 54 55 static struct bus_space_tag bst_store[3]; 56 57 static int 58 uart_cpu_channel(char *dev) 59 { 60 char alias[64]; 61 phandle_t aliases; 62 int len; 63 64 strcpy(alias, dev); 65 if ((aliases = OF_finddevice("/aliases")) != -1) 66 OF_getprop(aliases, dev, alias, sizeof(alias)); 67 len = strlen(alias); 68 if (len < 2 || alias[len - 2] != ':' || alias[len - 1] < 'a' || 69 alias[len - 1] > 'b') 70 return (0); 71 return (alias[len - 1] - 'a' + 1); 72 } 73 74 int 75 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 76 { 77 78 return ((b1->bsh == b2->bsh) ? 1 : 0); 79 } 80 81 /* 82 * Get the address of the UART that is selected as the console, if the 83 * console is an UART of course. Note that we enforce that both stdin and 84 * stdout are selected. 85 * Note that the currently active console (i.e. /chosen/stdout and 86 * /chosen/stdin) may not be the same as the device selected in the 87 * environment (ie /options/output-device and /options/input-device) because 88 * keyboard and screen were selected but the keyboard was unplugged or the 89 * user has changed the environment. In the latter case I would assume that 90 * the user expects that FreeBSD uses the new console setting. 91 * For weirder configurations, use ofw_console(4). 92 */ 93 static phandle_t 94 uart_cpu_getdev_console(phandle_t options, char *dev, size_t devsz) 95 { 96 char buf[32]; 97 phandle_t input; 98 99 if (OF_getprop(options, "input-device", dev, devsz) == -1) 100 return (-1); 101 if ((input = OF_finddevice(dev)) == -1) 102 return (-1); 103 if (OF_getprop(options, "output-device", buf, sizeof(buf)) == -1) 104 return (-1); 105 if (!strcmp(dev, "keyboard") && !strcmp(buf, "screen")) { 106 phandle_t chosen; 107 ihandle_t stdin, stdout; 108 109 if ((chosen = OF_finddevice("/chosen")) == -1) 110 return (-1); 111 if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1) 112 return (-1); 113 if ((input = OF_instance_to_package(stdin)) == -1) 114 return (-1); 115 if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1) 116 return (-1); 117 if (OF_instance_to_package(stdout) != input) 118 return (-1); 119 snprintf(dev, devsz, "ttya"); 120 } else if (OF_finddevice(buf) != input) 121 return (-1); 122 if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 123 return (-1); 124 if (strcmp(buf, "serial") != 0) 125 return (-1); 126 return (input); 127 } 128 129 /* 130 * Get the address of the UART that's selected as the debug port. Since 131 * there's no place for this in the OF, we use the kernel environment 132 * variable "hw.uart.dbgport". Note however that the variable is not a 133 * list of attributes. It's single device name or alias, as known by 134 * the OF. 135 */ 136 static phandle_t 137 uart_cpu_getdev_dbgport(phandle_t options, char *dev, size_t devsz) 138 { 139 char buf[32]; 140 phandle_t input; 141 142 if (!getenv_string("hw.uart.dbgport", dev, devsz)) 143 return (-1); 144 if ((input = OF_finddevice(dev)) == -1) 145 return (-1); 146 if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 147 return (-1); 148 if (strcmp(buf, "serial") != 0) 149 return (-1); 150 return (input); 151 } 152 153 static phandle_t 154 uart_cpu_getdev_keyboard(phandle_t root, char *dev, size_t devsz) 155 { 156 char buf[32]; 157 phandle_t child, node; 158 159 child = OF_child(root); 160 while (child != 0 && child != -1) { 161 if (OF_getprop(child, "device_type", buf, sizeof(buf)) != -1 && 162 !strcmp(buf, "serial") && 163 OF_getprop(child, "keyboard", buf, sizeof(buf)) != -1) { 164 OF_getprop(child, "name", dev, devsz); 165 return (child); 166 } 167 if ((node = uart_cpu_getdev_keyboard(child, dev, devsz)) != -1) 168 return (node); 169 child = OF_peer(child); 170 } 171 return (-1); 172 } 173 174 int 175 uart_cpu_getdev(int devtype, struct uart_devinfo *di) 176 { 177 char buf[32], dev[32], compat[32]; 178 phandle_t input, options; 179 bus_addr_t addr; 180 int baud, bits, error, space, stop; 181 char flag, par; 182 183 if ((options = OF_finddevice("/options")) == -1) 184 return (ENXIO); 185 switch (devtype) { 186 case UART_DEV_CONSOLE: 187 input = uart_cpu_getdev_console(options, dev, sizeof(dev)); 188 break; 189 case UART_DEV_DBGPORT: 190 input = uart_cpu_getdev_dbgport(options, dev, sizeof(dev)); 191 break; 192 case UART_DEV_KEYBOARD: 193 input = uart_cpu_getdev_keyboard(OF_peer(0), dev, sizeof(dev)); 194 break; 195 default: 196 input = -1; 197 break; 198 } 199 if (input == -1) 200 return (ENXIO); 201 error = OF_decode_addr(input, &space, &addr); 202 if (error) 203 return (error); 204 205 /* Get the device class. */ 206 if (OF_getprop(input, "name", buf, sizeof(buf)) == -1) 207 return (ENXIO); 208 if (OF_getprop(input, "compatible", compat, sizeof(compat)) == -1) 209 compat[0] = '\0'; 210 di->bas.regshft = 0; 211 di->bas.rclk = 0; 212 if (!strcmp(buf, "se")) { 213 di->ops = uart_sab82532_ops; 214 di->bas.chan = uart_cpu_channel(dev); 215 addr += 64 * (di->bas.chan - 1); 216 } else if (!strcmp(buf, "zs")) { 217 di->ops = uart_z8530_ops; 218 di->bas.chan = uart_cpu_channel(dev); 219 di->bas.regshft = 1; 220 addr += 4 - 4 * (di->bas.chan - 1); 221 } else if (!strcmp(buf, "su") || !strcmp(buf, "su_pnp") || 222 !strcmp(compat, "su") || !strcmp(compat, "su16550")) { 223 di->ops = uart_ns8250_ops; 224 di->bas.chan = 0; 225 } else 226 return (ENXIO); 227 228 /* Fill in the device info. */ 229 di->bas.bst = &bst_store[devtype]; 230 di->bas.bsh = sparc64_fake_bustag(space, addr, di->bas.bst); 231 232 /* Get the line settings. */ 233 if (devtype == UART_DEV_KEYBOARD) 234 di->baudrate = 1200; 235 else 236 di->baudrate = 9600; 237 di->databits = 8; 238 di->stopbits = 1; 239 di->parity = UART_PARITY_NONE; 240 snprintf(buf, sizeof(buf), "%s-mode", dev); 241 if (OF_getprop(options, buf, buf, sizeof(buf)) == -1) 242 return (0); 243 if (sscanf(buf, "%d,%d,%c,%d,%c", &baud, &bits, &par, &stop, &flag) 244 != 5) 245 return (0); 246 di->baudrate = baud; 247 di->databits = bits; 248 di->stopbits = stop; 249 di->parity = (par == 'n') ? UART_PARITY_NONE : 250 (par == 'o') ? UART_PARITY_ODD : UART_PARITY_EVEN; 251 return (0); 252 } 253 254 void 255 uart_cpu_identify(driver_t *driver, device_t parent) 256 { 257 #ifdef DEV_ISA 258 char buf[32]; 259 struct isa_regs reg; 260 device_t child; 261 phandle_t node; 262 ofw_isa_intr_t intr; 263 #endif 264 265 #ifdef DEV_ISA 266 if (strcmp(device_get_name(parent), "isa") == 0) { 267 if ((node = ofw_bus_get_node(device_get_parent(parent))) == 0) 268 return; 269 for (node = OF_child(node); node != 0; node = OF_peer(node)) { 270 if (OF_getprop(node, "name", buf, sizeof(buf)) == -1) 271 continue; 272 if (strcmp(buf, "serial") != 0) 273 continue; 274 if ((OF_getprop(node, "reg", ®, 275 sizeof(reg)) == -1) || 276 (OF_getprop(node, "interrupts", &intr, 277 sizeof(intr)) == -1)) 278 continue; 279 if ((child = BUS_ADD_CHILD(parent, ISA_ORDER_SENSITIVE, 280 uart_driver_name, -1)) == NULL) 281 return; 282 bus_set_resource(child, SYS_RES_IOPORT, 0, 283 ISA_REG_PHYS(®), reg.size); 284 bus_set_resource(child, SYS_RES_IRQ, 0, intr, 1); 285 } 286 } 287 #endif 288 } 289