1 /* 2 * Copyright (c) 2009 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Sepherosa Ziehau <sepherosa@gmail.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/interrupt.h> 38 #include <sys/kernel.h> 39 #include <sys/machintr.h> 40 #include <sys/systm.h> 41 42 #include <contrib/dev/acpica/source/include/acpi.h> 43 44 #include "acpi_sdt_var.h" 45 #include "acpi_sci_var.h" 46 47 #define FADT_VPRINTF(fmt, arg...) \ 48 do { \ 49 if (bootverbose) \ 50 kprintf("ACPI FADT: " fmt , ##arg); \ 51 } while (0) 52 53 struct acpi_sci_mode { 54 enum intr_trigger sci_trig; 55 enum intr_polarity sci_pola; 56 }; 57 58 static int acpi_sci_irq = -1; 59 static enum intr_trigger acpi_sci_trig = INTR_TRIGGER_CONFORM; 60 static enum intr_polarity acpi_sci_pola = INTR_POLARITY_CONFORM; 61 static const struct acpi_sci_mode *acpi_sci_mode1 = NULL; 62 63 static const struct acpi_sci_mode acpi_sci_modes[] = { 64 /* 65 * NOTE: Order is critical 66 */ 67 { INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW }, 68 { INTR_TRIGGER_LEVEL, INTR_POLARITY_HIGH }, 69 { INTR_TRIGGER_EDGE, INTR_POLARITY_HIGH }, 70 { INTR_TRIGGER_EDGE, INTR_POLARITY_LOW }, 71 72 /* Required last entry */ 73 { INTR_TRIGGER_CONFORM, INTR_POLARITY_CONFORM } 74 }; 75 76 /* 77 * Set to 1 to stop atkbdc from being configured early, via cninit(). 78 * 79 * Currently set to 0 because this is causing problems for several 80 * people. Can be set to 1 with a tunable. 81 */ 82 int acpi_fadt_8042_nolegacy = 0; 83 TUNABLE_INT("hw.acpi.fadt_8042_nolegacy", &acpi_fadt_8042_nolegacy); 84 85 static void 86 fadt_probe(void) 87 { 88 ACPI_TABLE_FADT *fadt; 89 vm_paddr_t fadt_paddr; 90 enum intr_trigger trig; 91 enum intr_polarity pola; 92 int enabled = 1; 93 char *env; 94 95 fadt_paddr = sdt_search(ACPI_SIG_FADT); 96 if (fadt_paddr == 0) { 97 acpi_fadt_8042_nolegacy = 0; 98 kprintf("fadt_probe: can't locate FADT\n"); 99 return; 100 } 101 102 fadt = sdt_sdth_map(fadt_paddr); 103 KKASSERT(fadt != NULL); 104 105 /* 106 * FADT in ACPI specification 1.0 - 6.0 107 */ 108 if (fadt->Header.Revision < 1 || fadt->Header.Revision > 6) { 109 kprintf("fadt_probe: unknown FADT revision %d\n", 110 fadt->Header.Revision); 111 } 112 113 if (fadt->Header.Length < ACPI_FADT_V1_SIZE) { 114 acpi_fadt_8042_nolegacy = 0; 115 kprintf("fadt_probe: invalid FADT length %u (< %u)\n", 116 fadt->Header.Length, ACPI_FADT_V1_SIZE); 117 goto back; 118 } 119 120 if (fadt->Header.Length >= ACPI_FADT_V3_SIZE && 121 fadt->Header.Revision >= 3) { 122 if ((fadt->BootFlags & ACPI_FADT_8042) != 0) 123 acpi_fadt_8042_nolegacy = 0; 124 } else { 125 acpi_fadt_8042_nolegacy = 0; 126 } 127 128 kgetenv_int("hw.acpi.sci.enabled", &enabled); 129 if (!enabled) 130 goto back; 131 132 acpi_sci_irq = fadt->SciInterrupt; 133 134 env = kgetenv("hw.acpi.sci.trigger"); 135 if (env == NULL) 136 goto back; 137 138 trig = INTR_TRIGGER_CONFORM; 139 if (strcmp(env, "edge") == 0) 140 trig = INTR_TRIGGER_EDGE; 141 else if (strcmp(env, "level") == 0) 142 trig = INTR_TRIGGER_LEVEL; 143 144 kfreeenv(env); 145 146 if (trig == INTR_TRIGGER_CONFORM) 147 goto back; 148 149 env = kgetenv("hw.acpi.sci.polarity"); 150 if (env == NULL) 151 goto back; 152 153 pola = INTR_POLARITY_CONFORM; 154 if (strcmp(env, "high") == 0) 155 pola = INTR_POLARITY_HIGH; 156 else if (strcmp(env, "low") == 0) 157 pola = INTR_POLARITY_LOW; 158 159 kfreeenv(env); 160 161 if (pola == INTR_POLARITY_CONFORM) 162 goto back; 163 164 acpi_sci_trig = trig; 165 acpi_sci_pola = pola; 166 back: 167 if (acpi_sci_irq >= 0) { 168 FADT_VPRINTF("SCI irq %d, %s/%s\n", acpi_sci_irq, 169 intr_str_trigger(acpi_sci_trig), 170 intr_str_polarity(acpi_sci_pola)); 171 } else { 172 FADT_VPRINTF("SCI is disabled\n"); 173 } 174 sdt_sdth_unmap(&fadt->Header); 175 } 176 SYSINIT(fadt_probe, SI_BOOT2_PRESMP, SI_ORDER_SECOND, fadt_probe, 0); 177 178 static void 179 acpi_sci_dummy_intr(void *dummy __unused, void *frame __unused) 180 { 181 } 182 183 static boolean_t 184 acpi_sci_test(const struct acpi_sci_mode *mode) 185 { 186 void *sci_desc; 187 long last_cnt; 188 189 FADT_VPRINTF("SCI testing %s/%s\n", 190 intr_str_trigger(mode->sci_trig), 191 intr_str_polarity(mode->sci_pola)); 192 193 last_cnt = get_interrupt_counter(acpi_sci_irq, 0); 194 195 machintr_legacy_intr_config(acpi_sci_irq, 196 mode->sci_trig, mode->sci_pola); 197 198 sci_desc = register_int(acpi_sci_irq, 199 acpi_sci_dummy_intr, NULL, "sci", NULL, 200 INTR_EXCL | INTR_CLOCK | 201 INTR_NOPOLL | INTR_MPSAFE | INTR_NOENTROPY, 0); 202 203 DELAY(100 * 1000); 204 205 unregister_int(sci_desc, 0); 206 207 if (get_interrupt_counter(acpi_sci_irq, 0) - last_cnt < 20) { 208 acpi_sci_trig = mode->sci_trig; 209 acpi_sci_pola = mode->sci_pola; 210 211 kprintf("ACPI FADT: SCI select %s/%s\n", 212 intr_str_trigger(acpi_sci_trig), 213 intr_str_polarity(acpi_sci_pola)); 214 return TRUE; 215 } 216 return FALSE; 217 } 218 219 void 220 acpi_sci_config(void) 221 { 222 const struct acpi_sci_mode *mode; 223 224 KKASSERT(mycpuid == 0); 225 226 if (machintr_legacy_intr_find(acpi_sci_irq, 227 INTR_TRIGGER_CONFORM, INTR_POLARITY_CONFORM) < 0) { 228 kprintf("ACPI FADT: SCI irq %d is invalid, disable\n", 229 acpi_sci_irq); 230 acpi_sci_irq = -1; 231 return; 232 } 233 234 if (acpi_sci_irq < 0) 235 return; 236 237 if (acpi_sci_trig != INTR_TRIGGER_CONFORM) { 238 KKASSERT(acpi_sci_pola != INTR_POLARITY_CONFORM); 239 machintr_legacy_intr_config(acpi_sci_irq, 240 acpi_sci_trig, acpi_sci_pola); 241 return; 242 } 243 244 kprintf("ACPI FADT: SCI testing interrupt mode ...\n"); 245 if (acpi_sci_mode1 != NULL) { 246 if (acpi_sci_test(acpi_sci_mode1)) 247 return; 248 } 249 for (mode = acpi_sci_modes; mode->sci_trig != INTR_TRIGGER_CONFORM; 250 ++mode) { 251 if (mode == acpi_sci_mode1) 252 continue; 253 if (acpi_sci_test(mode)) 254 return; 255 } 256 257 kprintf("ACPI FADT: no suitable interrupt mode for SCI, disable\n"); 258 acpi_sci_irq = -1; 259 } 260 261 int 262 acpi_sci_enabled(void) 263 { 264 if (acpi_sci_irq >= 0) 265 return 1; 266 else 267 return 0; 268 } 269 270 int 271 acpi_sci_pci_shareable(void) 272 { 273 if (acpi_sci_irq >= 0 && 274 acpi_sci_trig == INTR_TRIGGER_LEVEL && 275 acpi_sci_pola == INTR_POLARITY_LOW) 276 return 1; 277 else 278 return 0; 279 } 280 281 int 282 acpi_sci_irqno(void) 283 { 284 return acpi_sci_irq; 285 } 286 287 void 288 acpi_sci_setmode1(enum intr_trigger trig, enum intr_polarity pola) 289 { 290 const struct acpi_sci_mode *mode; 291 292 for (mode = acpi_sci_modes; mode->sci_trig != INTR_TRIGGER_CONFORM; 293 ++mode) { 294 if (mode->sci_trig == trig && mode->sci_pola == pola) { 295 acpi_sci_mode1 = mode; 296 return; 297 } 298 } 299 } 300