2 * From coreboot southbridge/intel/bd82x6x/lpc.c
4 * Copyright (C) 2008-2009 coresystems GmbH
6 * SPDX-License-Identifier: GPL-2.0
16 #include <asm/interrupt.h>
18 #include <asm/ioapic.h>
20 #include <asm/arch/pch.h>
24 #define ENABLE_ACPI_MODE_IN_COREBOOT 0
25 #define TEST_SMM_FLASH_LOCKDOWN 0
27 static int pch_enable_apic(pci_dev_t dev)
32 /* Enable ACPI I/O and power management. Set SCI IRQ to IRQ9 */
33 x86_pci_write_config8(dev, ACPI_CNTL, 0x80);
35 writel(0, IO_APIC_INDEX);
36 writel(1 << 25, IO_APIC_DATA);
38 /* affirm full set of redirection table entries ("write once") */
39 writel(1, IO_APIC_INDEX);
40 reg32 = readl(IO_APIC_DATA);
41 writel(1, IO_APIC_INDEX);
42 writel(reg32, IO_APIC_DATA);
44 writel(0, IO_APIC_INDEX);
45 reg32 = readl(IO_APIC_DATA);
46 debug("PCH APIC ID = %x\n", (reg32 >> 24) & 0x0f);
47 if (reg32 != (1 << 25)) {
48 printf("APIC Error - cannot write to registers\n");
52 debug("Dumping IOAPIC registers\n");
53 for (i = 0; i < 3; i++) {
54 writel(i, IO_APIC_INDEX);
55 debug(" reg 0x%04x:", i);
56 reg32 = readl(IO_APIC_DATA);
57 debug(" 0x%08x\n", reg32);
60 /* Select Boot Configuration register. */
61 writel(3, IO_APIC_INDEX);
63 /* Use Processor System Bus to deliver interrupts. */
64 writel(1, IO_APIC_DATA);
69 static void pch_enable_serial_irqs(pci_dev_t dev)
73 /* Set packet length and toggle silent mode bit for one frame. */
74 value = (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0);
75 #ifdef CONFIG_SERIRQ_CONTINUOUS_MODE
76 x86_pci_write_config8(dev, SERIRQ_CNTL, value);
78 x86_pci_write_config8(dev, SERIRQ_CNTL, value | (1 << 6));
82 static int pch_pirq_init(const void *blob, int node, pci_dev_t dev)
84 uint8_t route[8], *ptr;
86 if (fdtdec_get_byte_array(blob, node, "intel,pirq-routing", route,
90 x86_pci_write_config8(dev, PIRQA_ROUT, *ptr++);
91 x86_pci_write_config8(dev, PIRQB_ROUT, *ptr++);
92 x86_pci_write_config8(dev, PIRQC_ROUT, *ptr++);
93 x86_pci_write_config8(dev, PIRQD_ROUT, *ptr++);
95 x86_pci_write_config8(dev, PIRQE_ROUT, *ptr++);
96 x86_pci_write_config8(dev, PIRQF_ROUT, *ptr++);
97 x86_pci_write_config8(dev, PIRQG_ROUT, *ptr++);
98 x86_pci_write_config8(dev, PIRQH_ROUT, *ptr++);
101 * TODO(sjg@chromium.org): U-Boot does not set up the interrupts
102 * here. It's unclear if it is needed
107 static int pch_gpi_routing(const void *blob, int node, pci_dev_t dev)
113 if (fdtdec_get_byte_array(blob, node, "intel,gpi-routing", route,
117 for (reg = 0, gpi = 0; gpi < ARRAY_SIZE(route); gpi++)
118 reg |= route[gpi] << (gpi * 2);
120 x86_pci_write_config32(dev, 0xb8, reg);
125 static int pch_power_options(const void *blob, int node, pci_dev_t dev)
136 * Which state do we want to goto after g3 (power restored)?
140 * If the option is not existent (Laptops), use Kconfig setting.
141 * TODO(sjg@chromium.org): Make this configurable
143 pwr_on = MAINBOARD_POWER_ON;
145 reg16 = x86_pci_read_config16(dev, GEN_PMCON_3);
148 case MAINBOARD_POWER_OFF:
152 case MAINBOARD_POWER_ON:
156 case MAINBOARD_POWER_KEEP:
158 state = "state keep";
164 reg16 &= ~(3 << 4); /* SLP_S4# Assertion Stretch 4s */
165 reg16 |= (1 << 3); /* SLP_S4# Assertion Stretch Enable */
168 reg16 |= (1 << 11); /* SLP_S3# Min Assertion Width 50ms */
170 reg16 |= (1 << 12); /* Disable SLP stretch after SUS well */
172 x86_pci_write_config16(dev, GEN_PMCON_3, reg16);
173 debug("Set power %s after power failure.\n", state);
175 /* Set up NMI on errors. */
177 reg8 &= 0x0f; /* Higher Nibble must be 0 */
178 reg8 &= ~(1 << 3); /* IOCHK# NMI Enable */
179 reg8 |= (1 << 2); /* PCI SERR# Disable for now */
183 /* TODO(sjg@chromium.org): Make this configurable */
184 nmi_option = NMI_OFF;
186 debug("NMI sources enabled.\n");
187 reg8 &= ~(1 << 7); /* Set NMI. */
189 debug("NMI sources disabled.\n");
190 /* Can't mask NMI from PCI-E and NMI_NOW */
195 /* Enable CPU_SLP# and Intel Speedstep, set SMI# rate down */
196 reg16 = x86_pci_read_config16(dev, GEN_PMCON_1);
197 reg16 &= ~(3 << 0); /* SMI# rate 1 minute */
198 reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */
199 #if DEBUG_PERIODIC_SMIS
200 /* Set DEBUG_PERIODIC_SMIS in pch.h to debug using periodic SMIs */
201 reg16 |= (3 << 0); /* Periodic SMI every 8s */
203 x86_pci_write_config16(dev, GEN_PMCON_1, reg16);
205 /* Set the board's GPI routing. */
206 ret = pch_gpi_routing(blob, node, dev);
210 pmbase = x86_pci_read_config16(dev, 0x40) & 0xfffe;
212 writel(pmbase + GPE0_EN, fdtdec_get_int(blob, node,
213 "intel,gpe0-enable", 0));
214 writew(pmbase + ALT_GP_SMI_EN, fdtdec_get_int(blob, node,
215 "intel,alt-gp-smi-enable", 0));
217 /* Set up power management block and determine sleep mode */
218 reg32 = inl(pmbase + 0x04); /* PM1_CNT */
219 reg32 &= ~(7 << 10); /* SLP_TYP */
220 reg32 |= (1 << 0); /* SCI_EN */
221 outl(reg32, pmbase + 0x04);
223 /* Clear magic status bits to prevent unexpected wake */
224 setbits_le32(RCB_REG(0x3310), (1 << 4) | (1 << 5) | (1 << 0));
225 clrbits_le32(RCB_REG(0x3f02), 0xf);
230 static void pch_rtc_init(pci_dev_t dev)
235 reg8 = x86_pci_read_config8(dev, GEN_PMCON_3);
236 rtc_failed = reg8 & RTC_BATTERY_DEAD;
238 reg8 &= ~RTC_BATTERY_DEAD;
239 x86_pci_write_config8(dev, GEN_PMCON_3, reg8);
241 debug("rtc_failed = 0x%x\n", rtc_failed);
243 /* TODO: Handle power failure */
245 printf("RTC power failed\n");
248 /* CougarPoint PCH Power Management init */
249 static void cpt_pm_init(pci_dev_t dev)
251 debug("CougarPoint PM init\n");
252 x86_pci_write_config8(dev, 0xa9, 0x47);
253 setbits_le32(RCB_REG(0x2238), (1 << 6) | (1 << 0));
255 setbits_le32(RCB_REG(0x228c), 1 << 0);
256 setbits_le32(RCB_REG(0x1100), (1 << 13) | (1 << 14));
257 setbits_le32(RCB_REG(0x0900), 1 << 14);
258 writel(0xc0388400, RCB_REG(0x2304));
259 setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18));
260 setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1));
261 clrsetbits_le32(RCB_REG(0x3314), ~0x1f, 0xf);
262 writel(0x050f0000, RCB_REG(0x3318));
263 writel(0x04000000, RCB_REG(0x3324));
264 setbits_le32(RCB_REG(0x3340), 0xfffff);
265 setbits_le32(RCB_REG(0x3344), 1 << 1);
267 writel(0x0001c000, RCB_REG(0x3360));
268 writel(0x00061100, RCB_REG(0x3368));
269 writel(0x7f8fdfff, RCB_REG(0x3378));
270 writel(0x000003fc, RCB_REG(0x337c));
271 writel(0x00001000, RCB_REG(0x3388));
272 writel(0x0001c000, RCB_REG(0x3390));
273 writel(0x00000800, RCB_REG(0x33a0));
274 writel(0x00001000, RCB_REG(0x33b0));
275 writel(0x00093900, RCB_REG(0x33c0));
276 writel(0x24653002, RCB_REG(0x33cc));
277 writel(0x062108fe, RCB_REG(0x33d0));
278 clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060);
279 writel(0x01010000, RCB_REG(0x3a28));
280 writel(0x01010404, RCB_REG(0x3a2c));
281 writel(0x01041041, RCB_REG(0x3a80));
282 clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001);
283 setbits_le32(RCB_REG(0x3a84), 1 << 24); /* SATA 2/3 disabled */
284 setbits_le32(RCB_REG(0x3a88), 1 << 0); /* SATA 4/5 disabled */
285 writel(0x00000001, RCB_REG(0x3a6c));
286 clrsetbits_le32(RCB_REG(0x2344), ~0x00ffff00, 0xff00000c);
287 clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20);
288 writel(0, RCB_REG(0x33c8));
289 setbits_le32(RCB_REG(0x21b0), 0xf);
292 /* PantherPoint PCH Power Management init */
293 static void ppt_pm_init(pci_dev_t dev)
295 debug("PantherPoint PM init\n");
296 x86_pci_write_config8(dev, 0xa9, 0x47);
297 setbits_le32(RCB_REG(0x2238), 1 << 0);
298 setbits_le32(RCB_REG(0x228c), 1 << 0);
299 setbits_le16(RCB_REG(0x1100), (1 << 13) | (1 << 14));
300 setbits_le16(RCB_REG(0x0900), 1 << 14);
301 writel(0xc03b8400, RCB_REG(0x2304));
302 setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18));
303 setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1));
304 clrsetbits_le32(RCB_REG(0x3314), 0x1f, 0xf);
305 writel(0x054f0000, RCB_REG(0x3318));
306 writel(0x04000000, RCB_REG(0x3324));
307 setbits_le32(RCB_REG(0x3340), 0xfffff);
308 setbits_le32(RCB_REG(0x3344), (1 << 1) | (1 << 0));
309 writel(0x0001c000, RCB_REG(0x3360));
310 writel(0x00061100, RCB_REG(0x3368));
311 writel(0x7f8fdfff, RCB_REG(0x3378));
312 writel(0x000003fd, RCB_REG(0x337c));
313 writel(0x00001000, RCB_REG(0x3388));
314 writel(0x0001c000, RCB_REG(0x3390));
315 writel(0x00000800, RCB_REG(0x33a0));
316 writel(0x00001000, RCB_REG(0x33b0));
317 writel(0x00093900, RCB_REG(0x33c0));
318 writel(0x24653002, RCB_REG(0x33cc));
319 writel(0x067388fe, RCB_REG(0x33d0));
320 clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060);
321 writel(0x01010000, RCB_REG(0x3a28));
322 writel(0x01010404, RCB_REG(0x3a2c));
323 writel(0x01040000, RCB_REG(0x3a80));
324 clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001);
325 /* SATA 2/3 disabled */
326 setbits_le32(RCB_REG(0x3a84), 1 << 24);
327 /* SATA 4/5 disabled */
328 setbits_le32(RCB_REG(0x3a88), 1 << 0);
329 writel(0x00000001, RCB_REG(0x3a6c));
330 clrsetbits_le32(RCB_REG(0x2344), 0xff0000ff, 0xff00000c);
331 clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20);
332 setbits_le32(RCB_REG(0x33a4), (1 << 0));
333 writel(0, RCB_REG(0x33c8));
334 setbits_le32(RCB_REG(0x21b0), 0xf);
337 static void enable_hpet(void)
339 /* Move HPET to default address 0xfed00000 and enable it */
340 clrsetbits_le32(RCB_REG(HPTC), 3 << 0, 1 << 7);
343 static void enable_clock_gating(pci_dev_t dev)
348 setbits_le32(RCB_REG(0x2234), 0xf);
350 reg16 = x86_pci_read_config16(dev, GEN_PMCON_1);
351 reg16 |= (1 << 2) | (1 << 11);
352 x86_pci_write_config16(dev, GEN_PMCON_1, reg16);
354 pch_iobp_update(0xEB007F07, ~0UL, (1 << 31));
355 pch_iobp_update(0xEB004000, ~0UL, (1 << 7));
356 pch_iobp_update(0xEC007F07, ~0UL, (1 << 31));
357 pch_iobp_update(0xEC004000, ~0UL, (1 << 7));
359 reg32 = readl(RCB_REG(CG));
361 reg32 |= (1 << 29) | (1 << 28);
362 reg32 |= (1 << 27) | (1 << 26) | (1 << 25) | (1 << 24);
372 writel(reg32, RCB_REG(CG));
374 setbits_le32(RCB_REG(0x38c0), 0x7);
375 setbits_le32(RCB_REG(0x36d4), 0x6680c004);
376 setbits_le32(RCB_REG(0x3564), 0x3);
379 #if CONFIG_HAVE_SMI_HANDLER
380 static void pch_lock_smm(pci_dev_t dev)
382 #if TEST_SMM_FLASH_LOCKDOWN
386 if (acpi_slp_type != 3) {
387 #if ENABLE_ACPI_MODE_IN_COREBOOT
388 debug("Enabling ACPI via APMC:\n");
389 outb(0xe1, 0xb2); /* Enable ACPI mode */
392 debug("Disabling ACPI via APMC:\n");
393 outb(0x1e, 0xb2); /* Disable ACPI mode */
398 /* Don't allow evil boot loaders, kernels, or
399 * userspace applications to deceive us:
403 #if TEST_SMM_FLASH_LOCKDOWN
405 debug("Locking BIOS to RO... ");
406 reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
407 debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off",
408 (reg8 & 1) ? "rw" : "ro");
409 reg8 &= ~(1 << 0); /* clear BIOSWE */
410 x86_pci_write_config8(dev, 0xdc, reg8);
411 reg8 |= (1 << 1); /* set BLE */
412 x86_pci_write_config8(dev, 0xdc, reg8);
414 reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
415 debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off",
416 (reg8 & 1) ? "rw" : "ro");
419 writeb(0, 0xfff00000);
421 reg8 |= (1 << 0); /* set BIOSWE */
422 x86_pci_write_config8(dev, 0xdc, reg8);
424 reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
425 debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off",
426 (reg8 & 1) ? "rw" : "ro");
432 static void pch_disable_smm_only_flashing(pci_dev_t dev)
436 debug("Enabling BIOS updates outside of SMM... ");
437 reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
439 x86_pci_write_config8(dev, 0xdc, reg8);
442 static void pch_fixups(pci_dev_t dev)
446 /* Indicate DRAM init done for MRC S3 to know it can resume */
447 gen_pmcon_2 = x86_pci_read_config8(dev, GEN_PMCON_2);
448 gen_pmcon_2 |= (1 << 7);
449 x86_pci_write_config8(dev, GEN_PMCON_2, gen_pmcon_2);
451 /* Enable DMI ASPM in the PCH */
452 clrbits_le32(RCB_REG(0x2304), 1 << 10);
453 setbits_le32(RCB_REG(0x21a4), (1 << 11) | (1 << 10));
454 setbits_le32(RCB_REG(0x21a8), 0x3);
458 * Enable Prefetching and Caching.
460 static void enable_spi_prefetch(struct udevice *pch)
464 dm_pci_read_config8(pch, 0xdc, ®8);
466 reg8 |= (2 << 2); /* Prefetching and Caching Enabled */
467 dm_pci_write_config8(pch, 0xdc, reg8);
470 static void enable_port80_on_lpc(struct udevice *pch)
472 /* Enable port 80 POST on LPC */
473 dm_pci_write_config32(pch, PCH_RCBA_BASE, DEFAULT_RCBA | 1);
474 clrbits_le32(RCB_REG(GCS), 4);
477 static void set_spi_speed(void)
481 /* Observe SPI Descriptor Component Section 0 */
482 writel(0x1000, RCB_REG(SPI_DESC_COMP0));
484 /* Extract the1 Write/Erase SPI Frequency from descriptor */
485 fdod = readl(RCB_REG(SPI_FREQ_WR_ERA));
489 /* Set Software Sequence frequency to match */
490 clrsetbits_8(RCB_REG(SPI_FREQ_SWSEQ), 7, fdod);
494 * lpc_early_init() - set up LPC serial ports and other early things
497 * @return 0 if OK, -ve on error
499 static int lpc_early_init(struct udevice *dev)
508 count = fdtdec_get_int_array_count(gd->fdt_blob, dev->of_offset,
509 "intel,gen-dec", (u32 *)values,
510 sizeof(values) / sizeof(u32));
514 /* Set COM1/COM2 decode range */
515 dm_pci_write_config16(dev->parent, LPC_IO_DEC, 0x0010);
517 /* Enable PS/2 Keyboard/Mouse, EC areas and COM1 */
518 dm_pci_write_config16(dev->parent, LPC_EN, KBC_LPC_EN | MC_LPC_EN |
519 GAMEL_LPC_EN | COMA_LPC_EN);
521 /* Write all registers but use 0 if we run out of data */
522 count = count * sizeof(u32) / sizeof(values[0]);
523 for (i = 0, ptr = values; i < ARRAY_SIZE(values); i++, ptr++) {
527 reg = ptr->base | PCI_COMMAND_IO | (ptr->size << 16);
528 dm_pci_write_config32(dev->parent, LPC_GENX_DEC(i), reg);
531 enable_spi_prefetch(dev->parent);
533 /* This is already done in start.S, but let's do it in C */
534 enable_port80_on_lpc(dev->parent);
541 int lpc_init_extra(struct pci_controller *hose, pci_dev_t dev)
543 const void *blob = gd->fdt_blob;
546 debug("pch: lpc_init\n");
547 pci_write_bar32(hose, dev, 0, 0);
548 pci_write_bar32(hose, dev, 1, 0xff800000);
549 pci_write_bar32(hose, dev, 2, 0xfec00000);
550 pci_write_bar32(hose, dev, 3, 0x800);
551 pci_write_bar32(hose, dev, 4, 0x900);
553 node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_PCH);
557 /* Set the value for PCI command register. */
558 x86_pci_write_config16(dev, PCI_COMMAND, 0x000f);
560 /* IO APIC initialization. */
561 pch_enable_apic(dev);
563 pch_enable_serial_irqs(dev);
565 /* Setup the PIRQ. */
566 pch_pirq_init(blob, node, dev);
568 /* Setup power options. */
569 pch_power_options(blob, node, dev);
571 /* Initialize power management */
572 switch (pch_silicon_type()) {
573 case PCH_TYPE_CPT: /* CougarPoint */
576 case PCH_TYPE_PPT: /* PantherPoint */
580 printf("Unknown Chipset: %#02x.%dx\n", PCI_DEV(dev),
585 /* Initialize the real time clock. */
588 /* Initialize the High Precision Event Timers, if present. */
591 /* Initialize Clock Gating */
592 enable_clock_gating(dev);
594 pch_disable_smm_only_flashing(dev);
596 #if CONFIG_HAVE_SMI_HANDLER
605 void lpc_enable(pci_dev_t dev)
607 /* Enable PCH Display Port */
608 writew(0x0010, RCB_REG(DISPBDF));
609 setbits_le32(RCB_REG(FD2), PCH_ENABLE_DBDF);
612 static int bd82x6x_lpc_early_init(struct udevice *dev)
614 /* Setting up Southbridge. In the northbridge code. */
615 debug("Setting up static southbridge registers\n");
616 dm_pci_write_config32(dev->parent, PCH_RCBA_BASE, DEFAULT_RCBA | 1);
617 dm_pci_write_config32(dev->parent, PMBASE, DEFAULT_PMBASE | 1);
619 /* Enable ACPI BAR */
620 dm_pci_write_config8(dev->parent, ACPI_CNTL, 0x80);
622 debug("Disabling watchdog reboot\n");
623 setbits_le32(RCB_REG(GCS), 1 >> 5); /* No reset */
624 outw(1 << 11, DEFAULT_PMBASE | 0x60 | 0x08); /* halt timer */
626 dm_pci_write_config32(dev->parent, GPIO_BASE, DEFAULT_GPIOBASE | 1);
627 dm_pci_write_config32(dev->parent, GPIO_CNTL, 0x10);
632 static int bd82x6x_lpc_probe(struct udevice *dev)
636 if (gd->flags & GD_FLG_RELOC)
639 ret = lpc_early_init(dev);
641 debug("%s: lpc_early_init() failed\n", __func__);
645 return bd82x6x_lpc_early_init(dev);
648 static const struct udevice_id bd82x6x_lpc_ids[] = {
649 { .compatible = "intel,bd82x6x-lpc" },
653 U_BOOT_DRIVER(bd82x6x_lpc_drv) = {
656 .of_match = bd82x6x_lpc_ids,
657 .probe = bd82x6x_lpc_probe,