Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/i386/i386/geode.c
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1 /*- 2 * Copyright (c) 2003-2004 Poul-Henning Kamp 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 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD: releng/8.2/sys/i386/i386/geode.c 199583 2009-11-20 15:27:52Z jhb $"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/timetc.h> 33 #include <sys/bus.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/watchdog.h> 37 #include <dev/pci/pcireg.h> 38 #include <dev/pci/pcivar.h> 39 #include <dev/led/led.h> 40 #include <machine/pc/bios.h> 41 42 static struct bios_oem bios_soekris = { 43 { 0xf0000, 0xf1000 }, 44 { 45 { "Soekris", 0, 8 }, /* Soekris Engineering. */ 46 { "net4", 0, 8 }, /* net45xx */ 47 { "comBIOS", 0, 54 }, /* comBIOS ver. 1.26a 20040819 ... */ 48 { NULL, 0, 0 }, 49 } 50 }; 51 52 static struct bios_oem bios_soekris_55 = { 53 { 0xf0000, 0xf1000 }, 54 { 55 { "Soekris", 0, 8 }, /* Soekris Engineering. */ 56 { "net5", 0, 8 }, /* net5xxx */ 57 { "comBIOS", 0, 54 }, /* comBIOS ver. 1.26a 20040819 ... */ 58 { NULL, 0, 0 }, 59 } 60 }; 61 62 static struct bios_oem bios_pcengines = { 63 { 0xf9000, 0xfa000 }, 64 { 65 { "PC Engines WRAP", 0, 28 }, /* PC Engines WRAP.1C v1.03 */ 66 { "tinyBIOS", 0, 28 }, /* tinyBIOS V1.4a (C)1997-2003 */ 67 { NULL, 0, 0 }, 68 } 69 }; 70 71 static struct bios_oem bios_pcengines_55 = { 72 { 0xf9000, 0xfa000 }, 73 { 74 { "PC Engines ALIX", 0, 28 }, /* PC Engines ALIX */ 75 { "tinyBIOS", 0, 28 }, /* tinyBIOS V1.4a (C)1997-2005 */ 76 { NULL, 0, 0 }, 77 } 78 }; 79 80 static struct bios_oem bios_advantech = { 81 { 0xfe000, 0xff000 }, 82 { 83 { "**** PCM-582", 5, 33 }, /* PCM-5823 BIOS V1.12 ... */ 84 { "GXm-Cx5530", -11, 35 }, /* 06/07/2002-GXm-Cx5530... */ 85 { NULL, 0, 0 }, 86 } 87 }; 88 89 static unsigned cba; 90 static unsigned gpio; 91 static unsigned geode_counter; 92 93 static struct cdev *led1, *led2, *led3; 94 static int led1b, led2b, led3b; 95 96 static void 97 led_func(void *ptr, int onoff) 98 { 99 uint32_t u; 100 int bit; 101 102 bit = *(int *)ptr; 103 if (bit < 0) { 104 bit = -bit; 105 onoff = !onoff; 106 } 107 108 u = inl(gpio + 4); 109 if (onoff) 110 u |= 1 << bit; 111 else 112 u &= ~(1 << bit); 113 outl(gpio, u); 114 } 115 116 static void 117 cs5536_led_func(void *ptr, int onoff) 118 { 119 int bit; 120 uint16_t a; 121 122 bit = *(int *)ptr; 123 if (bit < 0) { 124 bit = -bit; 125 onoff = !onoff; 126 } 127 128 a = rdmsr(0x5140000c); 129 if (bit >= 16) { 130 a += 0x80; 131 bit -= 16; 132 } 133 134 if (onoff) 135 outl(a, 1 << bit); 136 else 137 outl(a, 1 << (bit + 16)); 138 } 139 140 141 static unsigned 142 geode_get_timecount(struct timecounter *tc) 143 { 144 return (inl(geode_counter)); 145 } 146 147 static struct timecounter geode_timecounter = { 148 geode_get_timecount, 149 NULL, 150 0xffffffff, 151 27000000, 152 "Geode", 153 1000 154 }; 155 156 static uint64_t 157 geode_cputicks(void) 158 { 159 unsigned c; 160 static unsigned last; 161 static uint64_t offset; 162 163 c = inl(geode_counter); 164 if (c < last) 165 offset += (1LL << 32); 166 last = c; 167 return (offset | c); 168 } 169 170 /* 171 * The GEODE watchdog runs from a 32kHz frequency. One period of that is 172 * 31250 nanoseconds which we round down to 2^14 nanoseconds. The watchdog 173 * consists of a power-of-two prescaler and a 16 bit counter, so the math 174 * is quite simple. The max timeout is 14 + 16 + 13 = 2^43 nsec ~= 2h26m. 175 */ 176 static void 177 geode_watchdog(void *foo __unused, u_int cmd, int *error) 178 { 179 u_int u, p, r; 180 181 u = cmd & WD_INTERVAL; 182 if (u >= 14 && u <= 43) { 183 u -= 14; 184 if (u > 16) { 185 p = u - 16; 186 u -= p; 187 } else { 188 p = 0; 189 } 190 if (u == 16) 191 u = (1 << u) - 1; 192 else 193 u = 1 << u; 194 r = inw(cba + 2) & 0xff00; 195 outw(cba + 2, p | 0xf0 | r); 196 outw(cba, u); 197 *error = 0; 198 } else { 199 outw(cba, 0); 200 } 201 } 202 203 /* 204 * We run MFGPT0 off the 32kHz frequency and prescale by 16384 giving a 205 * period of half a second. 206 * Range becomes 2^30 (= 1 sec) to 2^44 (almost 5 hours) 207 */ 208 static void 209 cs5536_watchdog(void *foo __unused, u_int cmd, int *error) 210 { 211 u_int u, p; 212 uint16_t a; 213 uint32_t m; 214 215 a = rdmsr(0x5140000d); 216 m = rdmsr(0x51400029); 217 m &= ~(1 << 24); 218 wrmsr(0x51400029, m); 219 220 u = cmd & WD_INTERVAL; 221 if (u >= 30 && u <= 44) { 222 p = 1 << (u - 29); 223 224 /* Set up MFGPT0, 32khz, prescaler 16k, C2 event */ 225 outw(a + 6, 0x030e); 226 /* set comparator 2 */ 227 outw(a + 2, p); 228 /* reset counter */ 229 outw(a + 4, 0); 230 /* Arm reset mechanism */ 231 m |= (1 << 24); 232 wrmsr(0x51400029, m); 233 /* Start counter */ 234 outw(a + 6, 0x8000); 235 236 *error = 0; 237 } 238 } 239 240 /* 241 * The Advantech PCM-582x watchdog expects 0x1 at I/O port 0x0443 242 * every 1.6 secs +/- 30%. Writing 0x0 disables the watchdog 243 * NB: reading the I/O port enables the timer as well 244 */ 245 static void 246 advantech_watchdog(void *foo __unused, u_int cmd, int *error) 247 { 248 u_int u; 249 250 u = cmd & WD_INTERVAL; 251 if (u > 0 && u <= WD_TO_1SEC) { 252 outb(0x0443, 1); 253 *error = 0; 254 } else { 255 outb(0x0443, 0); 256 } 257 } 258 259 static int 260 geode_probe(device_t self) 261 { 262 #define BIOS_OEM_MAXLEN 80 263 static u_char bios_oem[BIOS_OEM_MAXLEN] = "\0"; 264 265 switch (pci_get_devid(self)) { 266 case 0x0515100b: 267 if (geode_counter == 0) { 268 /* 269 * The address of the CBA is written to this register 270 * by the bios, see p161 in data sheet. 271 */ 272 cba = pci_read_config(self, 0x64, 4); 273 if (bootverbose) 274 printf("Geode CBA@ 0x%x\n", cba); 275 geode_counter = cba + 0x08; 276 outl(cba + 0x0d, 2); 277 if (bootverbose) 278 printf("Geode rev: %02x %02x\n", 279 inb(cba + 0x3c), inb(cba + 0x3d)); 280 tc_init(&geode_timecounter); 281 EVENTHANDLER_REGISTER(watchdog_list, geode_watchdog, 282 NULL, 0); 283 set_cputicker(geode_cputicks, 27000000, 0); 284 } 285 break; 286 case 0x0510100b: 287 gpio = pci_read_config(self, PCIR_BAR(0), 4); 288 gpio &= ~0x1f; 289 if (bootverbose) 290 printf("Geode GPIO@ = %x\n", gpio); 291 if (bios_oem_strings(&bios_soekris, 292 bios_oem, sizeof bios_oem) > 0 ) { 293 led1b = 20; 294 led1 = led_create(led_func, &led1b, "error"); 295 } else if (bios_oem_strings(&bios_pcengines, 296 bios_oem, sizeof bios_oem) > 0 ) { 297 led1b = -2; 298 led2b = -3; 299 led3b = -18; 300 led1 = led_create(led_func, &led1b, "led1"); 301 led2 = led_create(led_func, &led2b, "led2"); 302 led3 = led_create(led_func, &led3b, "led3"); 303 /* 304 * Turn on first LED so we don't make 305 * people think their box just died. 306 */ 307 led_func(&led1b, 1); 308 } 309 if (*bios_oem) 310 printf("Geode %s\n", bios_oem); 311 break; 312 case 0x01011078: 313 if (bios_oem_strings(&bios_advantech, 314 bios_oem, sizeof bios_oem) > 0 ) { 315 printf("Geode %s\n", bios_oem); 316 EVENTHANDLER_REGISTER(watchdog_list, advantech_watchdog, 317 NULL, 0); 318 } 319 break; 320 case 0x20801022: 321 if (bios_oem_strings(&bios_soekris_55, 322 bios_oem, sizeof bios_oem) > 0 ) { 323 led1b = 6; 324 led1 = led_create(cs5536_led_func, &led1b, "error"); 325 } else if (bios_oem_strings(&bios_pcengines_55, 326 bios_oem, sizeof bios_oem) > 0 ) { 327 led1b = -6; 328 led2b = -25; 329 led3b = -27; 330 led1 = led_create(cs5536_led_func, &led1b, "led1"); 331 led2 = led_create(cs5536_led_func, &led2b, "led2"); 332 led3 = led_create(cs5536_led_func, &led3b, "led3"); 333 /* 334 * Turn on first LED so we don't make 335 * people think their box just died. 336 */ 337 cs5536_led_func(&led1b, 1); 338 } 339 if (*bios_oem) 340 printf("Geode LX: %s\n", bios_oem); 341 if (bootverbose) 342 printf("MFGPT bar: %jx\n", rdmsr(0x5140000d)); 343 EVENTHANDLER_REGISTER(watchdog_list, cs5536_watchdog, NULL, 0); 344 break; 345 } 346 return (ENXIO); 347 } 348 349 static int 350 geode_attach(device_t self) 351 { 352 353 return(ENODEV); 354 } 355 356 static device_method_t geode_methods[] = { 357 /* Device interface */ 358 DEVMETHOD(device_probe, geode_probe), 359 DEVMETHOD(device_attach, geode_attach), 360 DEVMETHOD(device_suspend, bus_generic_suspend), 361 DEVMETHOD(device_resume, bus_generic_resume), 362 DEVMETHOD(device_shutdown, bus_generic_shutdown), 363 {0, 0} 364 }; 365 366 static driver_t geode_driver = { 367 "geode", 368 geode_methods, 369 0, 370 }; 371 372 static devclass_t geode_devclass; 373 374 DRIVER_MODULE(geode, pci, geode_driver, geode_devclass, 0, 0);
Cache object: 3926533f5440dba57aea7dd259224615
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