1 // SPDX-License-Identifier: GPL-2.0
3 * From coreboot southbridge/intel/bd82x6x/lpc.c
5 * Copyright (C) 2008-2009 coresystems GmbH
14 #include <asm/global_data.h>
15 #include <asm/intel_regs.h>
16 #include <asm/interrupt.h>
18 #include <asm/ioapic.h>
19 #include <asm/lpc_common.h>
21 #include <asm/arch/pch.h>
23 DECLARE_GLOBAL_DATA_PTR;
27 #define ENABLE_ACPI_MODE_IN_COREBOOT 0
28 #define TEST_SMM_FLASH_LOCKDOWN 0
30 static int pch_enable_apic(struct udevice *pch)
35 /* Enable ACPI I/O and power management. Set SCI IRQ to IRQ9 */
36 dm_pci_write_config8(pch, ACPI_CNTL, 0x80);
38 writel(0, IO_APIC_INDEX);
39 writel(1 << 25, IO_APIC_DATA);
41 /* affirm full set of redirection table entries ("write once") */
42 writel(1, IO_APIC_INDEX);
43 reg32 = readl(IO_APIC_DATA);
44 writel(1, IO_APIC_INDEX);
45 writel(reg32, IO_APIC_DATA);
47 writel(0, IO_APIC_INDEX);
48 reg32 = readl(IO_APIC_DATA);
49 debug("PCH APIC ID = %x\n", (reg32 >> 24) & 0x0f);
50 if (reg32 != (1 << 25)) {
51 printf("APIC Error - cannot write to registers\n");
55 debug("Dumping IOAPIC registers\n");
56 for (i = 0; i < 3; i++) {
57 writel(i, IO_APIC_INDEX);
58 debug(" reg 0x%04x:", i);
59 reg32 = readl(IO_APIC_DATA);
60 debug(" 0x%08x\n", reg32);
63 /* Select Boot Configuration register. */
64 writel(3, IO_APIC_INDEX);
66 /* Use Processor System Bus to deliver interrupts. */
67 writel(1, IO_APIC_DATA);
72 static void pch_enable_serial_irqs(struct udevice *pch)
76 /* Set packet length and toggle silent mode bit for one frame. */
77 value = (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0);
78 #ifdef CONFIG_SERIRQ_CONTINUOUS_MODE
79 dm_pci_write_config8(pch, SERIRQ_CNTL, value);
81 dm_pci_write_config8(pch, SERIRQ_CNTL, value | (1 << 6));
85 static int pch_pirq_init(struct udevice *pch)
87 uint8_t route[8], *ptr;
89 if (fdtdec_get_byte_array(gd->fdt_blob, dev_of_offset(pch),
90 "intel,pirq-routing", route, sizeof(route)))
93 dm_pci_write_config8(pch, PIRQA_ROUT, *ptr++);
94 dm_pci_write_config8(pch, PIRQB_ROUT, *ptr++);
95 dm_pci_write_config8(pch, PIRQC_ROUT, *ptr++);
96 dm_pci_write_config8(pch, PIRQD_ROUT, *ptr++);
98 dm_pci_write_config8(pch, PIRQE_ROUT, *ptr++);
99 dm_pci_write_config8(pch, PIRQF_ROUT, *ptr++);
100 dm_pci_write_config8(pch, PIRQG_ROUT, *ptr++);
101 dm_pci_write_config8(pch, PIRQH_ROUT, *ptr++);
104 * TODO(sjg@chromium.org): U-Boot does not set up the interrupts
105 * here. It's unclear if it is needed
110 static int pch_gpi_routing(struct udevice *pch)
116 if (fdtdec_get_byte_array(gd->fdt_blob, dev_of_offset(pch),
117 "intel,gpi-routing", route, sizeof(route)))
120 for (reg = 0, gpi = 0; gpi < ARRAY_SIZE(route); gpi++)
121 reg |= route[gpi] << (gpi * 2);
123 dm_pci_write_config32(pch, 0xb8, reg);
128 static int pch_power_options(struct udevice *pch)
130 const void *blob = gd->fdt_blob;
131 int node = dev_of_offset(pch);
141 * Which state do we want to goto after g3 (power restored)?
145 * If the option is not existent (Laptops), use Kconfig setting.
146 * TODO(sjg@chromium.org): Make this configurable
148 pwr_on = MAINBOARD_POWER_ON;
150 dm_pci_read_config16(pch, GEN_PMCON_3, ®16);
153 case MAINBOARD_POWER_OFF:
157 case MAINBOARD_POWER_ON:
161 case MAINBOARD_POWER_KEEP:
163 state = "state keep";
169 reg16 &= ~(3 << 4); /* SLP_S4# Assertion Stretch 4s */
170 reg16 |= (1 << 3); /* SLP_S4# Assertion Stretch Enable */
173 reg16 |= (1 << 11); /* SLP_S3# Min Assertion Width 50ms */
175 reg16 |= (1 << 12); /* Disable SLP stretch after SUS well */
177 dm_pci_write_config16(pch, GEN_PMCON_3, reg16);
178 debug("Set power %s after power failure.\n", state);
180 /* Set up NMI on errors. */
182 reg8 &= 0x0f; /* Higher Nibble must be 0 */
183 reg8 &= ~(1 << 3); /* IOCHK# NMI Enable */
184 reg8 |= (1 << 2); /* PCI SERR# Disable for now */
188 /* TODO(sjg@chromium.org): Make this configurable */
189 nmi_option = NMI_OFF;
191 debug("NMI sources enabled.\n");
192 reg8 &= ~(1 << 7); /* Set NMI. */
194 debug("NMI sources disabled.\n");
195 /* Can't mask NMI from PCI-E and NMI_NOW */
200 /* Enable CPU_SLP# and Intel Speedstep, set SMI# rate down */
201 dm_pci_read_config16(pch, GEN_PMCON_1, ®16);
202 reg16 &= ~(3 << 0); /* SMI# rate 1 minute */
203 reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */
204 #if DEBUG_PERIODIC_SMIS
205 /* Set DEBUG_PERIODIC_SMIS in pch.h to debug using periodic SMIs */
206 reg16 |= (3 << 0); /* Periodic SMI every 8s */
208 dm_pci_write_config16(pch, GEN_PMCON_1, reg16);
210 /* Set the board's GPI routing. */
211 ret = pch_gpi_routing(pch);
215 dm_pci_read_config16(pch, 0x40, &pmbase);
218 writel(fdtdec_get_int(blob, node, "intel,gpe0-enable", 0),
219 (ulong)pmbase + GPE0_EN);
220 writew(fdtdec_get_int(blob, node, "intel,alt-gp-smi-enable", 0),
221 (ulong)pmbase + ALT_GP_SMI_EN);
223 /* Set up power management block and determine sleep mode */
224 reg32 = inl(pmbase + 0x04); /* PM1_CNT */
225 reg32 &= ~(7 << 10); /* SLP_TYP */
226 reg32 |= (1 << 0); /* SCI_EN */
227 outl(reg32, pmbase + 0x04);
229 /* Clear magic status bits to prevent unexpected wake */
230 setbits_le32(RCB_REG(0x3310), (1 << 4) | (1 << 5) | (1 << 0));
231 clrbits_le32(RCB_REG(0x3f02), 0xf);
236 static void pch_rtc_init(struct udevice *pch)
241 dm_pci_read_config8(pch, GEN_PMCON_3, ®8);
242 rtc_failed = reg8 & RTC_BATTERY_DEAD;
244 reg8 &= ~RTC_BATTERY_DEAD;
245 dm_pci_write_config8(pch, GEN_PMCON_3, reg8);
247 debug("rtc_failed = 0x%x\n", rtc_failed);
249 /* TODO: Handle power failure */
251 printf("RTC power failed\n");
254 /* CougarPoint PCH Power Management init */
255 static void cpt_pm_init(struct udevice *pch)
257 debug("CougarPoint PM init\n");
258 dm_pci_write_config8(pch, 0xa9, 0x47);
259 setbits_le32(RCB_REG(0x2238), (1 << 6) | (1 << 0));
261 setbits_le32(RCB_REG(0x228c), 1 << 0);
262 setbits_le32(RCB_REG(0x1100), (1 << 13) | (1 << 14));
263 setbits_le32(RCB_REG(0x0900), 1 << 14);
264 writel(0xc0388400, RCB_REG(0x2304));
265 setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18));
266 setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1));
267 clrsetbits_le32(RCB_REG(0x3314), ~0x1f, 0xf);
268 writel(0x050f0000, RCB_REG(0x3318));
269 writel(0x04000000, RCB_REG(0x3324));
270 setbits_le32(RCB_REG(0x3340), 0xfffff);
271 setbits_le32(RCB_REG(0x3344), 1 << 1);
273 writel(0x0001c000, RCB_REG(0x3360));
274 writel(0x00061100, RCB_REG(0x3368));
275 writel(0x7f8fdfff, RCB_REG(0x3378));
276 writel(0x000003fc, RCB_REG(0x337c));
277 writel(0x00001000, RCB_REG(0x3388));
278 writel(0x0001c000, RCB_REG(0x3390));
279 writel(0x00000800, RCB_REG(0x33a0));
280 writel(0x00001000, RCB_REG(0x33b0));
281 writel(0x00093900, RCB_REG(0x33c0));
282 writel(0x24653002, RCB_REG(0x33cc));
283 writel(0x062108fe, RCB_REG(0x33d0));
284 clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060);
285 writel(0x01010000, RCB_REG(0x3a28));
286 writel(0x01010404, RCB_REG(0x3a2c));
287 writel(0x01041041, RCB_REG(0x3a80));
288 clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001);
289 setbits_le32(RCB_REG(0x3a84), 1 << 24); /* SATA 2/3 disabled */
290 setbits_le32(RCB_REG(0x3a88), 1 << 0); /* SATA 4/5 disabled */
291 writel(0x00000001, RCB_REG(0x3a6c));
292 clrsetbits_le32(RCB_REG(0x2344), ~0x00ffff00, 0xff00000c);
293 clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20);
294 writel(0, RCB_REG(0x33c8));
295 setbits_le32(RCB_REG(0x21b0), 0xf);
298 /* PantherPoint PCH Power Management init */
299 static void ppt_pm_init(struct udevice *pch)
301 debug("PantherPoint PM init\n");
302 dm_pci_write_config8(pch, 0xa9, 0x47);
303 setbits_le32(RCB_REG(0x2238), 1 << 0);
304 setbits_le32(RCB_REG(0x228c), 1 << 0);
305 setbits_le16(RCB_REG(0x1100), (1 << 13) | (1 << 14));
306 setbits_le16(RCB_REG(0x0900), 1 << 14);
307 writel(0xc03b8400, RCB_REG(0x2304));
308 setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18));
309 setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1));
310 clrsetbits_le32(RCB_REG(0x3314), 0x1f, 0xf);
311 writel(0x054f0000, RCB_REG(0x3318));
312 writel(0x04000000, RCB_REG(0x3324));
313 setbits_le32(RCB_REG(0x3340), 0xfffff);
314 setbits_le32(RCB_REG(0x3344), (1 << 1) | (1 << 0));
315 writel(0x0001c000, RCB_REG(0x3360));
316 writel(0x00061100, RCB_REG(0x3368));
317 writel(0x7f8fdfff, RCB_REG(0x3378));
318 writel(0x000003fd, RCB_REG(0x337c));
319 writel(0x00001000, RCB_REG(0x3388));
320 writel(0x0001c000, RCB_REG(0x3390));
321 writel(0x00000800, RCB_REG(0x33a0));
322 writel(0x00001000, RCB_REG(0x33b0));
323 writel(0x00093900, RCB_REG(0x33c0));
324 writel(0x24653002, RCB_REG(0x33cc));
325 writel(0x067388fe, RCB_REG(0x33d0));
326 clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060);
327 writel(0x01010000, RCB_REG(0x3a28));
328 writel(0x01010404, RCB_REG(0x3a2c));
329 writel(0x01040000, RCB_REG(0x3a80));
330 clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001);
331 /* SATA 2/3 disabled */
332 setbits_le32(RCB_REG(0x3a84), 1 << 24);
333 /* SATA 4/5 disabled */
334 setbits_le32(RCB_REG(0x3a88), 1 << 0);
335 writel(0x00000001, RCB_REG(0x3a6c));
336 clrsetbits_le32(RCB_REG(0x2344), 0xff0000ff, 0xff00000c);
337 clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20);
338 setbits_le32(RCB_REG(0x33a4), (1 << 0));
339 writel(0, RCB_REG(0x33c8));
340 setbits_le32(RCB_REG(0x21b0), 0xf);
343 static void enable_hpet(void)
345 /* Move HPET to default address 0xfed00000 and enable it */
346 clrsetbits_le32(RCB_REG(HPTC), 3 << 0, 1 << 7);
349 static void enable_clock_gating(struct udevice *pch)
354 setbits_le32(RCB_REG(0x2234), 0xf);
356 dm_pci_read_config16(pch, GEN_PMCON_1, ®16);
357 reg16 |= (1 << 2) | (1 << 11);
358 dm_pci_write_config16(pch, GEN_PMCON_1, reg16);
360 pch_iobp_update(pch, 0xeb007f07, ~0U, 1 << 31);
361 pch_iobp_update(pch, 0xeb004000, ~0U, 1 << 7);
362 pch_iobp_update(pch, 0xec007f07, ~0U, 1 << 31);
363 pch_iobp_update(pch, 0xec004000, ~0U, 1 << 7);
365 reg32 = readl(RCB_REG(CG));
367 reg32 |= (1 << 29) | (1 << 28);
368 reg32 |= (1 << 27) | (1 << 26) | (1 << 25) | (1 << 24);
378 writel(reg32, RCB_REG(CG));
380 setbits_le32(RCB_REG(0x38c0), 0x7);
381 setbits_le32(RCB_REG(0x36d4), 0x6680c004);
382 setbits_le32(RCB_REG(0x3564), 0x3);
385 static void pch_disable_smm_only_flashing(struct udevice *pch)
389 debug("Enabling BIOS updates outside of SMM... ");
390 dm_pci_read_config8(pch, 0xdc, ®8); /* BIOS_CNTL */
392 dm_pci_write_config8(pch, 0xdc, reg8);
395 static void pch_fixups(struct udevice *pch)
399 /* Indicate DRAM init done for MRC S3 to know it can resume */
400 dm_pci_read_config8(pch, GEN_PMCON_2, &gen_pmcon_2);
401 gen_pmcon_2 |= (1 << 7);
402 dm_pci_write_config8(pch, GEN_PMCON_2, gen_pmcon_2);
404 /* Enable DMI ASPM in the PCH */
405 clrbits_le32(RCB_REG(0x2304), 1 << 10);
406 setbits_le32(RCB_REG(0x21a4), (1 << 11) | (1 << 10));
407 setbits_le32(RCB_REG(0x21a8), 0x3);
410 static void set_spi_speed(void)
414 /* Observe SPI Descriptor Component Section 0 */
415 writel(0x1000, RCB_REG(SPI_DESC_COMP0));
417 /* Extract the1 Write/Erase SPI Frequency from descriptor */
418 fdod = readl(RCB_REG(SPI_FREQ_WR_ERA));
422 /* Set Software Sequence frequency to match */
423 clrsetbits_8(RCB_REG(SPI_FREQ_SWSEQ), 7, fdod);
426 static int lpc_init_extra(struct udevice *dev)
428 struct udevice *pch = dev->parent;
430 debug("pch: lpc_init\n");
431 dm_pci_write_bar32(pch, 0, 0);
432 dm_pci_write_bar32(pch, 1, 0xff800000);
433 dm_pci_write_bar32(pch, 2, 0xfec00000);
434 dm_pci_write_bar32(pch, 3, 0x800);
435 dm_pci_write_bar32(pch, 4, 0x900);
437 /* Set the value for PCI command register. */
438 dm_pci_write_config16(pch, PCI_COMMAND, 0x000f);
440 /* IO APIC initialization. */
441 pch_enable_apic(pch);
443 pch_enable_serial_irqs(pch);
445 /* Setup the PIRQ. */
448 /* Setup power options. */
449 pch_power_options(pch);
451 /* Initialize power management */
452 switch (pch_silicon_type(pch)) {
453 case PCH_TYPE_CPT: /* CougarPoint */
456 case PCH_TYPE_PPT: /* PantherPoint */
460 printf("Unknown Chipset: %s\n", pch->name);
464 /* Initialize the real time clock. */
467 /* Initialize the High Precision Event Timers, if present. */
470 /* Initialize Clock Gating */
471 enable_clock_gating(pch);
473 pch_disable_smm_only_flashing(pch);
480 static int bd82x6x_lpc_early_init(struct udevice *dev)
484 /* Setting up Southbridge. In the northbridge code. */
485 debug("Setting up static southbridge registers\n");
486 dm_pci_write_config32(dev->parent, PCH_RCBA_BASE,
487 RCB_BASE_ADDRESS | 1);
488 dm_pci_write_config32(dev->parent, PMBASE, DEFAULT_PMBASE | 1);
490 /* Enable ACPI BAR */
491 dm_pci_write_config8(dev->parent, ACPI_CNTL, 0x80);
493 debug("Disabling watchdog reboot\n");
494 setbits_le32(RCB_REG(GCS), 1 >> 5); /* No reset */
495 outw(1 << 11, DEFAULT_PMBASE | 0x60 | 0x08); /* halt timer */
497 dm_pci_write_config32(dev->parent, GPIO_BASE, DEFAULT_GPIOBASE | 1);
498 dm_pci_write_config32(dev->parent, GPIO_CNTL, 0x10);
503 static int bd82x6x_lpc_probe(struct udevice *dev)
507 if (!(gd->flags & GD_FLG_RELOC)) {
508 ret = lpc_common_early_init(dev);
510 debug("%s: lpc_early_init() failed\n", __func__);
514 return bd82x6x_lpc_early_init(dev);
517 return lpc_init_extra(dev);
520 static const struct udevice_id bd82x6x_lpc_ids[] = {
521 { .compatible = "intel,bd82x6x-lpc" },
525 U_BOOT_DRIVER(bd82x6x_lpc_drv) = {
528 .of_match = bd82x6x_lpc_ids,
529 .probe = bd82x6x_lpc_probe,