1 /* 2 * From coreboot southbridge/intel/bd82x6x/lpc.c 3 * 4 * Copyright (C) 2008-2009 coresystems GmbH 5 * 6 * SPDX-License-Identifier: GPL-2.0 7 */ 8 9 #include <common.h> 10 #include <dm.h> 11 #include <errno.h> 12 #include <fdtdec.h> 13 #include <rtc.h> 14 #include <pci.h> 15 #include <asm/intel_regs.h> 16 #include <asm/interrupt.h> 17 #include <asm/io.h> 18 #include <asm/ioapic.h> 19 #include <asm/lpc_common.h> 20 #include <asm/pci.h> 21 #include <asm/arch/pch.h> 22 23 #define NMI_OFF 0 24 25 #define ENABLE_ACPI_MODE_IN_COREBOOT 0 26 #define TEST_SMM_FLASH_LOCKDOWN 0 27 28 static int pch_enable_apic(struct udevice *pch) 29 { 30 u32 reg32; 31 int i; 32 33 /* Enable ACPI I/O and power management. Set SCI IRQ to IRQ9 */ 34 dm_pci_write_config8(pch, ACPI_CNTL, 0x80); 35 36 writel(0, IO_APIC_INDEX); 37 writel(1 << 25, IO_APIC_DATA); 38 39 /* affirm full set of redirection table entries ("write once") */ 40 writel(1, IO_APIC_INDEX); 41 reg32 = readl(IO_APIC_DATA); 42 writel(1, IO_APIC_INDEX); 43 writel(reg32, IO_APIC_DATA); 44 45 writel(0, IO_APIC_INDEX); 46 reg32 = readl(IO_APIC_DATA); 47 debug("PCH APIC ID = %x\n", (reg32 >> 24) & 0x0f); 48 if (reg32 != (1 << 25)) { 49 printf("APIC Error - cannot write to registers\n"); 50 return -EPERM; 51 } 52 53 debug("Dumping IOAPIC registers\n"); 54 for (i = 0; i < 3; i++) { 55 writel(i, IO_APIC_INDEX); 56 debug(" reg 0x%04x:", i); 57 reg32 = readl(IO_APIC_DATA); 58 debug(" 0x%08x\n", reg32); 59 } 60 61 /* Select Boot Configuration register. */ 62 writel(3, IO_APIC_INDEX); 63 64 /* Use Processor System Bus to deliver interrupts. */ 65 writel(1, IO_APIC_DATA); 66 67 return 0; 68 } 69 70 static void pch_enable_serial_irqs(struct udevice *pch) 71 { 72 u32 value; 73 74 /* Set packet length and toggle silent mode bit for one frame. */ 75 value = (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0); 76 #ifdef CONFIG_SERIRQ_CONTINUOUS_MODE 77 dm_pci_write_config8(pch, SERIRQ_CNTL, value); 78 #else 79 dm_pci_write_config8(pch, SERIRQ_CNTL, value | (1 << 6)); 80 #endif 81 } 82 83 static int pch_pirq_init(struct udevice *pch) 84 { 85 uint8_t route[8], *ptr; 86 87 if (fdtdec_get_byte_array(gd->fdt_blob, pch->of_offset, 88 "intel,pirq-routing", route, sizeof(route))) 89 return -EINVAL; 90 ptr = route; 91 dm_pci_write_config8(pch, PIRQA_ROUT, *ptr++); 92 dm_pci_write_config8(pch, PIRQB_ROUT, *ptr++); 93 dm_pci_write_config8(pch, PIRQC_ROUT, *ptr++); 94 dm_pci_write_config8(pch, PIRQD_ROUT, *ptr++); 95 96 dm_pci_write_config8(pch, PIRQE_ROUT, *ptr++); 97 dm_pci_write_config8(pch, PIRQF_ROUT, *ptr++); 98 dm_pci_write_config8(pch, PIRQG_ROUT, *ptr++); 99 dm_pci_write_config8(pch, PIRQH_ROUT, *ptr++); 100 101 /* 102 * TODO(sjg@chromium.org): U-Boot does not set up the interrupts 103 * here. It's unclear if it is needed 104 */ 105 return 0; 106 } 107 108 static int pch_gpi_routing(struct udevice *pch) 109 { 110 u8 route[16]; 111 u32 reg; 112 int gpi; 113 114 if (fdtdec_get_byte_array(gd->fdt_blob, pch->of_offset, 115 "intel,gpi-routing", route, sizeof(route))) 116 return -EINVAL; 117 118 for (reg = 0, gpi = 0; gpi < ARRAY_SIZE(route); gpi++) 119 reg |= route[gpi] << (gpi * 2); 120 121 dm_pci_write_config32(pch, 0xb8, reg); 122 123 return 0; 124 } 125 126 static int pch_power_options(struct udevice *pch) 127 { 128 const void *blob = gd->fdt_blob; 129 int node = pch->of_offset; 130 u8 reg8; 131 u16 reg16, pmbase; 132 u32 reg32; 133 const char *state; 134 int pwr_on; 135 int nmi_option; 136 int ret; 137 138 /* 139 * Which state do we want to goto after g3 (power restored)? 140 * 0 == S0 Full On 141 * 1 == S5 Soft Off 142 * 143 * If the option is not existent (Laptops), use Kconfig setting. 144 * TODO(sjg@chromium.org): Make this configurable 145 */ 146 pwr_on = MAINBOARD_POWER_ON; 147 148 dm_pci_read_config16(pch, GEN_PMCON_3, ®16); 149 reg16 &= 0xfffe; 150 switch (pwr_on) { 151 case MAINBOARD_POWER_OFF: 152 reg16 |= 1; 153 state = "off"; 154 break; 155 case MAINBOARD_POWER_ON: 156 reg16 &= ~1; 157 state = "on"; 158 break; 159 case MAINBOARD_POWER_KEEP: 160 reg16 &= ~1; 161 state = "state keep"; 162 break; 163 default: 164 state = "undefined"; 165 } 166 167 reg16 &= ~(3 << 4); /* SLP_S4# Assertion Stretch 4s */ 168 reg16 |= (1 << 3); /* SLP_S4# Assertion Stretch Enable */ 169 170 reg16 &= ~(1 << 10); 171 reg16 |= (1 << 11); /* SLP_S3# Min Assertion Width 50ms */ 172 173 reg16 |= (1 << 12); /* Disable SLP stretch after SUS well */ 174 175 dm_pci_write_config16(pch, GEN_PMCON_3, reg16); 176 debug("Set power %s after power failure.\n", state); 177 178 /* Set up NMI on errors. */ 179 reg8 = inb(0x61); 180 reg8 &= 0x0f; /* Higher Nibble must be 0 */ 181 reg8 &= ~(1 << 3); /* IOCHK# NMI Enable */ 182 reg8 |= (1 << 2); /* PCI SERR# Disable for now */ 183 outb(reg8, 0x61); 184 185 reg8 = inb(0x70); 186 /* TODO(sjg@chromium.org): Make this configurable */ 187 nmi_option = NMI_OFF; 188 if (nmi_option) { 189 debug("NMI sources enabled.\n"); 190 reg8 &= ~(1 << 7); /* Set NMI. */ 191 } else { 192 debug("NMI sources disabled.\n"); 193 /* Can't mask NMI from PCI-E and NMI_NOW */ 194 reg8 |= (1 << 7); 195 } 196 outb(reg8, 0x70); 197 198 /* Enable CPU_SLP# and Intel Speedstep, set SMI# rate down */ 199 dm_pci_read_config16(pch, GEN_PMCON_1, ®16); 200 reg16 &= ~(3 << 0); /* SMI# rate 1 minute */ 201 reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */ 202 #if DEBUG_PERIODIC_SMIS 203 /* Set DEBUG_PERIODIC_SMIS in pch.h to debug using periodic SMIs */ 204 reg16 |= (3 << 0); /* Periodic SMI every 8s */ 205 #endif 206 dm_pci_write_config16(pch, GEN_PMCON_1, reg16); 207 208 /* Set the board's GPI routing. */ 209 ret = pch_gpi_routing(pch); 210 if (ret) 211 return ret; 212 213 dm_pci_read_config16(pch, 0x40, &pmbase); 214 pmbase &= 0xfffe; 215 216 writel(pmbase + GPE0_EN, fdtdec_get_int(blob, node, 217 "intel,gpe0-enable", 0)); 218 writew(pmbase + ALT_GP_SMI_EN, fdtdec_get_int(blob, node, 219 "intel,alt-gp-smi-enable", 0)); 220 221 /* Set up power management block and determine sleep mode */ 222 reg32 = inl(pmbase + 0x04); /* PM1_CNT */ 223 reg32 &= ~(7 << 10); /* SLP_TYP */ 224 reg32 |= (1 << 0); /* SCI_EN */ 225 outl(reg32, pmbase + 0x04); 226 227 /* Clear magic status bits to prevent unexpected wake */ 228 setbits_le32(RCB_REG(0x3310), (1 << 4) | (1 << 5) | (1 << 0)); 229 clrbits_le32(RCB_REG(0x3f02), 0xf); 230 231 return 0; 232 } 233 234 static void pch_rtc_init(struct udevice *pch) 235 { 236 int rtc_failed; 237 u8 reg8; 238 239 dm_pci_read_config8(pch, GEN_PMCON_3, ®8); 240 rtc_failed = reg8 & RTC_BATTERY_DEAD; 241 if (rtc_failed) { 242 reg8 &= ~RTC_BATTERY_DEAD; 243 dm_pci_write_config8(pch, GEN_PMCON_3, reg8); 244 } 245 debug("rtc_failed = 0x%x\n", rtc_failed); 246 247 /* TODO: Handle power failure */ 248 if (rtc_failed) 249 printf("RTC power failed\n"); 250 } 251 252 /* CougarPoint PCH Power Management init */ 253 static void cpt_pm_init(struct udevice *pch) 254 { 255 debug("CougarPoint PM init\n"); 256 dm_pci_write_config8(pch, 0xa9, 0x47); 257 setbits_le32(RCB_REG(0x2238), (1 << 6) | (1 << 0)); 258 259 setbits_le32(RCB_REG(0x228c), 1 << 0); 260 setbits_le32(RCB_REG(0x1100), (1 << 13) | (1 << 14)); 261 setbits_le32(RCB_REG(0x0900), 1 << 14); 262 writel(0xc0388400, RCB_REG(0x2304)); 263 setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18)); 264 setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1)); 265 clrsetbits_le32(RCB_REG(0x3314), ~0x1f, 0xf); 266 writel(0x050f0000, RCB_REG(0x3318)); 267 writel(0x04000000, RCB_REG(0x3324)); 268 setbits_le32(RCB_REG(0x3340), 0xfffff); 269 setbits_le32(RCB_REG(0x3344), 1 << 1); 270 271 writel(0x0001c000, RCB_REG(0x3360)); 272 writel(0x00061100, RCB_REG(0x3368)); 273 writel(0x7f8fdfff, RCB_REG(0x3378)); 274 writel(0x000003fc, RCB_REG(0x337c)); 275 writel(0x00001000, RCB_REG(0x3388)); 276 writel(0x0001c000, RCB_REG(0x3390)); 277 writel(0x00000800, RCB_REG(0x33a0)); 278 writel(0x00001000, RCB_REG(0x33b0)); 279 writel(0x00093900, RCB_REG(0x33c0)); 280 writel(0x24653002, RCB_REG(0x33cc)); 281 writel(0x062108fe, RCB_REG(0x33d0)); 282 clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060); 283 writel(0x01010000, RCB_REG(0x3a28)); 284 writel(0x01010404, RCB_REG(0x3a2c)); 285 writel(0x01041041, RCB_REG(0x3a80)); 286 clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001); 287 setbits_le32(RCB_REG(0x3a84), 1 << 24); /* SATA 2/3 disabled */ 288 setbits_le32(RCB_REG(0x3a88), 1 << 0); /* SATA 4/5 disabled */ 289 writel(0x00000001, RCB_REG(0x3a6c)); 290 clrsetbits_le32(RCB_REG(0x2344), ~0x00ffff00, 0xff00000c); 291 clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20); 292 writel(0, RCB_REG(0x33c8)); 293 setbits_le32(RCB_REG(0x21b0), 0xf); 294 } 295 296 /* PantherPoint PCH Power Management init */ 297 static void ppt_pm_init(struct udevice *pch) 298 { 299 debug("PantherPoint PM init\n"); 300 dm_pci_write_config8(pch, 0xa9, 0x47); 301 setbits_le32(RCB_REG(0x2238), 1 << 0); 302 setbits_le32(RCB_REG(0x228c), 1 << 0); 303 setbits_le16(RCB_REG(0x1100), (1 << 13) | (1 << 14)); 304 setbits_le16(RCB_REG(0x0900), 1 << 14); 305 writel(0xc03b8400, RCB_REG(0x2304)); 306 setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18)); 307 setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1)); 308 clrsetbits_le32(RCB_REG(0x3314), 0x1f, 0xf); 309 writel(0x054f0000, RCB_REG(0x3318)); 310 writel(0x04000000, RCB_REG(0x3324)); 311 setbits_le32(RCB_REG(0x3340), 0xfffff); 312 setbits_le32(RCB_REG(0x3344), (1 << 1) | (1 << 0)); 313 writel(0x0001c000, RCB_REG(0x3360)); 314 writel(0x00061100, RCB_REG(0x3368)); 315 writel(0x7f8fdfff, RCB_REG(0x3378)); 316 writel(0x000003fd, RCB_REG(0x337c)); 317 writel(0x00001000, RCB_REG(0x3388)); 318 writel(0x0001c000, RCB_REG(0x3390)); 319 writel(0x00000800, RCB_REG(0x33a0)); 320 writel(0x00001000, RCB_REG(0x33b0)); 321 writel(0x00093900, RCB_REG(0x33c0)); 322 writel(0x24653002, RCB_REG(0x33cc)); 323 writel(0x067388fe, RCB_REG(0x33d0)); 324 clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060); 325 writel(0x01010000, RCB_REG(0x3a28)); 326 writel(0x01010404, RCB_REG(0x3a2c)); 327 writel(0x01040000, RCB_REG(0x3a80)); 328 clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001); 329 /* SATA 2/3 disabled */ 330 setbits_le32(RCB_REG(0x3a84), 1 << 24); 331 /* SATA 4/5 disabled */ 332 setbits_le32(RCB_REG(0x3a88), 1 << 0); 333 writel(0x00000001, RCB_REG(0x3a6c)); 334 clrsetbits_le32(RCB_REG(0x2344), 0xff0000ff, 0xff00000c); 335 clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20); 336 setbits_le32(RCB_REG(0x33a4), (1 << 0)); 337 writel(0, RCB_REG(0x33c8)); 338 setbits_le32(RCB_REG(0x21b0), 0xf); 339 } 340 341 static void enable_hpet(void) 342 { 343 /* Move HPET to default address 0xfed00000 and enable it */ 344 clrsetbits_le32(RCB_REG(HPTC), 3 << 0, 1 << 7); 345 } 346 347 static void enable_clock_gating(struct udevice *pch) 348 { 349 u32 reg32; 350 u16 reg16; 351 352 setbits_le32(RCB_REG(0x2234), 0xf); 353 354 dm_pci_read_config16(pch, GEN_PMCON_1, ®16); 355 reg16 |= (1 << 2) | (1 << 11); 356 dm_pci_write_config16(pch, GEN_PMCON_1, reg16); 357 358 pch_iobp_update(pch, 0xEB007F07, ~0UL, (1 << 31)); 359 pch_iobp_update(pch, 0xEB004000, ~0UL, (1 << 7)); 360 pch_iobp_update(pch, 0xEC007F07, ~0UL, (1 << 31)); 361 pch_iobp_update(pch, 0xEC004000, ~0UL, (1 << 7)); 362 363 reg32 = readl(RCB_REG(CG)); 364 reg32 |= (1 << 31); 365 reg32 |= (1 << 29) | (1 << 28); 366 reg32 |= (1 << 27) | (1 << 26) | (1 << 25) | (1 << 24); 367 reg32 |= (1 << 16); 368 reg32 |= (1 << 17); 369 reg32 |= (1 << 18); 370 reg32 |= (1 << 22); 371 reg32 |= (1 << 23); 372 reg32 &= ~(1 << 20); 373 reg32 |= (1 << 19); 374 reg32 |= (1 << 0); 375 reg32 |= (0xf << 1); 376 writel(reg32, RCB_REG(CG)); 377 378 setbits_le32(RCB_REG(0x38c0), 0x7); 379 setbits_le32(RCB_REG(0x36d4), 0x6680c004); 380 setbits_le32(RCB_REG(0x3564), 0x3); 381 } 382 383 static void pch_disable_smm_only_flashing(struct udevice *pch) 384 { 385 u8 reg8; 386 387 debug("Enabling BIOS updates outside of SMM... "); 388 dm_pci_read_config8(pch, 0xdc, ®8); /* BIOS_CNTL */ 389 reg8 &= ~(1 << 5); 390 dm_pci_write_config8(pch, 0xdc, reg8); 391 } 392 393 static void pch_fixups(struct udevice *pch) 394 { 395 u8 gen_pmcon_2; 396 397 /* Indicate DRAM init done for MRC S3 to know it can resume */ 398 dm_pci_read_config8(pch, GEN_PMCON_2, &gen_pmcon_2); 399 gen_pmcon_2 |= (1 << 7); 400 dm_pci_write_config8(pch, GEN_PMCON_2, gen_pmcon_2); 401 402 /* Enable DMI ASPM in the PCH */ 403 clrbits_le32(RCB_REG(0x2304), 1 << 10); 404 setbits_le32(RCB_REG(0x21a4), (1 << 11) | (1 << 10)); 405 setbits_le32(RCB_REG(0x21a8), 0x3); 406 } 407 408 static void set_spi_speed(void) 409 { 410 u32 fdod; 411 412 /* Observe SPI Descriptor Component Section 0 */ 413 writel(0x1000, RCB_REG(SPI_DESC_COMP0)); 414 415 /* Extract the1 Write/Erase SPI Frequency from descriptor */ 416 fdod = readl(RCB_REG(SPI_FREQ_WR_ERA)); 417 fdod >>= 24; 418 fdod &= 7; 419 420 /* Set Software Sequence frequency to match */ 421 clrsetbits_8(RCB_REG(SPI_FREQ_SWSEQ), 7, fdod); 422 } 423 424 static int lpc_init_extra(struct udevice *dev) 425 { 426 struct udevice *pch = dev->parent; 427 428 debug("pch: lpc_init\n"); 429 dm_pci_write_bar32(pch, 0, 0); 430 dm_pci_write_bar32(pch, 1, 0xff800000); 431 dm_pci_write_bar32(pch, 2, 0xfec00000); 432 dm_pci_write_bar32(pch, 3, 0x800); 433 dm_pci_write_bar32(pch, 4, 0x900); 434 435 /* Set the value for PCI command register. */ 436 dm_pci_write_config16(pch, PCI_COMMAND, 0x000f); 437 438 /* IO APIC initialization. */ 439 pch_enable_apic(pch); 440 441 pch_enable_serial_irqs(pch); 442 443 /* Setup the PIRQ. */ 444 pch_pirq_init(pch); 445 446 /* Setup power options. */ 447 pch_power_options(pch); 448 449 /* Initialize power management */ 450 switch (pch_silicon_type(pch)) { 451 case PCH_TYPE_CPT: /* CougarPoint */ 452 cpt_pm_init(pch); 453 break; 454 case PCH_TYPE_PPT: /* PantherPoint */ 455 ppt_pm_init(pch); 456 break; 457 default: 458 printf("Unknown Chipset: %s\n", pch->name); 459 return -ENOSYS; 460 } 461 462 /* Initialize the real time clock. */ 463 pch_rtc_init(pch); 464 465 /* Initialize the High Precision Event Timers, if present. */ 466 enable_hpet(); 467 468 /* Initialize Clock Gating */ 469 enable_clock_gating(pch); 470 471 pch_disable_smm_only_flashing(pch); 472 473 pch_fixups(pch); 474 475 return 0; 476 } 477 478 static int bd82x6x_lpc_early_init(struct udevice *dev) 479 { 480 set_spi_speed(); 481 482 /* Setting up Southbridge. In the northbridge code. */ 483 debug("Setting up static southbridge registers\n"); 484 dm_pci_write_config32(dev->parent, PCH_RCBA_BASE, 485 RCB_BASE_ADDRESS | 1); 486 dm_pci_write_config32(dev->parent, PMBASE, DEFAULT_PMBASE | 1); 487 488 /* Enable ACPI BAR */ 489 dm_pci_write_config8(dev->parent, ACPI_CNTL, 0x80); 490 491 debug("Disabling watchdog reboot\n"); 492 setbits_le32(RCB_REG(GCS), 1 >> 5); /* No reset */ 493 outw(1 << 11, DEFAULT_PMBASE | 0x60 | 0x08); /* halt timer */ 494 495 dm_pci_write_config32(dev->parent, GPIO_BASE, DEFAULT_GPIOBASE | 1); 496 dm_pci_write_config32(dev->parent, GPIO_CNTL, 0x10); 497 498 return 0; 499 } 500 501 static int bd82x6x_lpc_probe(struct udevice *dev) 502 { 503 int ret; 504 505 if (!(gd->flags & GD_FLG_RELOC)) { 506 ret = lpc_common_early_init(dev); 507 if (ret) { 508 debug("%s: lpc_early_init() failed\n", __func__); 509 return ret; 510 } 511 512 return bd82x6x_lpc_early_init(dev); 513 } 514 515 return lpc_init_extra(dev); 516 } 517 518 static const struct udevice_id bd82x6x_lpc_ids[] = { 519 { .compatible = "intel,bd82x6x-lpc" }, 520 { } 521 }; 522 523 U_BOOT_DRIVER(bd82x6x_lpc_drv) = { 524 .name = "lpc", 525 .id = UCLASS_LPC, 526 .of_match = bd82x6x_lpc_ids, 527 .probe = bd82x6x_lpc_probe, 528 }; 529