1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2016 Google, Inc
12 #include <asm/i8259.h>
13 #include <asm/intel_regs.h>
15 #include <asm/ioapic.h>
16 #include <asm/lpc_common.h>
17 #include <asm/pch_common.h>
18 #include <asm/arch/cpu.h>
19 #include <asm/arch/gpio.h>
20 #include <asm/arch/iomap.h>
21 #include <asm/arch/pch.h>
22 #include <asm/arch/pm.h>
23 #include <asm/arch/rcb.h>
24 #include <asm/arch/serialio.h>
25 #include <asm/arch/spi.h>
26 #include <dm/uclass-internal.h>
27 #include <linux/delay.h>
29 #define BIOS_CTRL 0xdc
33 u32 fm = cpu_get_family_model();
35 return fm == BROADWELL_FAMILY_ULT || fm == HASWELL_FAMILY_ULT;
38 static int broadwell_pch_early_init(struct udevice *dev)
40 struct gpio_desc desc;
45 dm_pci_write_config32(dev, PCH_RCBA, RCB_BASE_ADDRESS | 1);
47 dm_pci_write_config32(dev, PMBASE, ACPI_BASE_ADDRESS | 1);
48 dm_pci_write_config8(dev, ACPI_CNTL, ACPI_EN);
49 dm_pci_write_config32(dev, GPIO_BASE, GPIO_BASE_ADDRESS | 1);
50 dm_pci_write_config8(dev, GPIO_CNTL, GPIO_EN);
53 writew(0x1000, RCB_REG(OIC));
54 /* Read back for posted write */
57 /* Set HPET address and enable it */
58 clrsetbits_le32(RCB_REG(HPTC), 3, 1 << 7);
59 /* Read back for posted write */
61 /* Enable HPET to start counter */
62 setbits_le32(HPET_BASE_ADDRESS + 0x10, 1 << 0);
64 setbits_le32(RCB_REG(GCS), 1 << 5);
67 * Enable PP3300_AUTOBAHN_EN after initial GPIO setup
68 * to prevent possible brownout. This will cause the GPIOs to be set
69 * up if it has not been done already.
71 ret = gpio_request_by_name(dev, "power-enable-gpio", 0, &desc,
72 GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
76 /* 8.14 Additional PCI Express Programming Steps, step #1 */
77 bdf = PCI_BDF(0, 0x1c, 0);
78 bus = pci_get_controller(dev);
79 pci_bus_clrset_config32(bus, bdf, 0xf4, 0x60, 0);
80 pci_bus_clrset_config32(bus, bdf, 0xf4, 0x80, 0x80);
81 pci_bus_clrset_config32(bus, bdf, 0xe2, 0x30, 0x30);
86 static void pch_misc_init(struct udevice *dev)
88 /* Setup SLP signal assertion, SLP_S4=4s, SLP_S3=50ms */
89 dm_pci_clrset_config8(dev, GEN_PMCON_3, 3 << 4 | 1 << 10,
90 1 << 3 | 1 << 11 | 1 << 12);
91 /* Prepare sleep mode */
92 clrsetio_32(ACPI_BASE_ADDRESS + PM1_CNT, SLP_TYP, SCI_EN);
94 /* Setup NMI on errors, disable SERR */
95 clrsetio_8(0x61, 0xf0, 1 << 2);
96 /* Disable NMI sources */
97 setio_8(0x70, 1 << 7);
98 /* Indicate DRAM init done for MRC */
99 dm_pci_clrset_config8(dev, GEN_PMCON_2, 0, 1 << 7);
101 /* Clear status bits to prevent unexpected wake */
102 setbits_le32(RCB_REG(0x3310), 0x0000002f);
103 clrsetbits_le32(RCB_REG(0x3f02), 0x0000000f, 0);
104 /* Enable PCIe Relaxed Order */
105 setbits_le32(RCB_REG(0x2314), 1 << 31 | 1 << 7);
106 setbits_le32(RCB_REG(0x1114), 1 << 15 | 1 << 14);
107 /* Setup SERIRQ, enable continuous mode */
108 dm_pci_clrset_config8(dev, SERIRQ_CNTL, 0, 1 << 7 | 1 << 6);
111 static void pch_enable_ioapic(void)
115 /* Make sure this is a unique ID within system */
116 io_apic_set_id(0x04);
118 /* affirm full set of redirection table entries ("write once") */
119 reg32 = io_apic_read(0x01);
121 /* PCH-LP has 39 redirection entries */
122 reg32 &= ~0x00ff0000;
125 io_apic_write(0x01, reg32);
128 * Select Boot Configuration register (0x03) and
129 * use Processor System Bus (0x01) to deliver interrupts.
131 io_apic_write(0x03, 0x01);
134 /* Enable all requested GPE */
135 void enable_all_gpe(u32 set1, u32 set2, u32 set3, u32 set4)
137 outl(set1, ACPI_BASE_ADDRESS + GPE0_EN(GPE_31_0));
138 outl(set2, ACPI_BASE_ADDRESS + GPE0_EN(GPE_63_32));
139 outl(set3, ACPI_BASE_ADDRESS + GPE0_EN(GPE_94_64));
140 outl(set4, ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD));
144 * Enable GPIO SMI events - it would be good to put this in the GPIO driver
145 * but it would need a new driver operation.
147 int enable_alt_smi(struct udevice *pch, u32 mask)
149 struct pch_lp_gpio_regs *regs;
153 ret = pch_get_gpio_base(pch, &gpiobase);
155 debug("%s: invalid GPIOBASE address (%08x)\n", __func__,
160 regs = (struct pch_lp_gpio_regs *)gpiobase;
161 setio_32(regs->alt_gpi_smi_en, mask);
166 static int pch_power_options(struct udevice *dev)
168 int pwr_on_after_power_fail = MAINBOARD_POWER_OFF;
174 dm_pci_read_config16(dev, GEN_PMCON_3, ®16);
176 switch (pwr_on_after_power_fail) {
177 case MAINBOARD_POWER_OFF:
181 case MAINBOARD_POWER_ON:
185 case MAINBOARD_POWER_KEEP:
187 state = "state keep";
192 dm_pci_write_config16(dev, GEN_PMCON_3, reg16);
193 debug("Set power %s after power failure.\n", state);
195 /* GPE setup based on device tree configuration */
196 ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev),
197 "intel,gpe0-en", enable, ARRAY_SIZE(enable));
200 enable_all_gpe(enable[0], enable[1], enable[2], enable[3]);
202 /* SMI setup based on device tree configuration */
203 enable_alt_smi(dev, fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
204 "intel,alt-gp-smi-enable", 0));
209 /* Magic register settings for power management */
210 static void pch_pm_init_magic(struct udevice *dev)
212 dm_pci_write_config8(dev, 0xa9, 0x46);
213 clrbits_le32(RCB_REG(0x232c), 1),
214 setbits_le32(RCB_REG(0x1100), 0x0000c13f);
215 clrsetbits_le32(RCB_REG(0x2320), 0x60, 0x10);
216 writel(0x00012fff, RCB_REG(0x3314));
217 clrsetbits_le32(RCB_REG(0x3318), 0x000f0330, 0x0dcf0400);
218 writel(0x04000000, RCB_REG(0x3324));
219 writel(0x00041400, RCB_REG(0x3368));
220 writel(0x3f8ddbff, RCB_REG(0x3388));
221 writel(0x00007001, RCB_REG(0x33ac));
222 writel(0x00181900, RCB_REG(0x33b0));
223 writel(0x00060A00, RCB_REG(0x33c0));
224 writel(0x06200840, RCB_REG(0x33d0));
225 writel(0x01010101, RCB_REG(0x3a28));
226 writel(0x040c0404, RCB_REG(0x3a2c));
227 writel(0x9000000a, RCB_REG(0x3a9c));
228 writel(0x03808033, RCB_REG(0x2b1c));
229 writel(0x80000009, RCB_REG(0x2b34));
230 writel(0x022ddfff, RCB_REG(0x3348));
231 writel(0x00000001, RCB_REG(0x334c));
232 writel(0x0001c000, RCB_REG(0x3358));
233 writel(0x3f8ddbff, RCB_REG(0x3380));
234 writel(0x0001c7e1, RCB_REG(0x3384));
235 writel(0x0001c7e1, RCB_REG(0x338c));
236 writel(0x0001c000, RCB_REG(0x3398));
237 writel(0x00181900, RCB_REG(0x33a8));
238 writel(0x00080000, RCB_REG(0x33dc));
239 writel(0x00000001, RCB_REG(0x33e0));
240 writel(0x0000040c, RCB_REG(0x3a20));
241 writel(0x01010101, RCB_REG(0x3a24));
242 writel(0x01010101, RCB_REG(0x3a30));
243 dm_pci_clrset_config32(dev, 0xac, 0x00200000, 0);
244 setbits_le32(RCB_REG(0x0410), 0x00000003);
245 setbits_le32(RCB_REG(0x2618), 0x08000000);
246 setbits_le32(RCB_REG(0x2300), 0x00000002);
247 setbits_le32(RCB_REG(0x2600), 0x00000008);
248 writel(0x00007001, RCB_REG(0x33b4));
249 writel(0x022ddfff, RCB_REG(0x3350));
250 writel(0x00000001, RCB_REG(0x3354));
251 /* Power Optimizer */
252 setbits_le32(RCB_REG(0x33d4), 0x08000000);
254 * This stops the LCD from turning on:
255 * setbits_le32(RCB_REG(0x33c8), 0x08000080);
257 writel(0x0000883c, RCB_REG(0x2b10));
258 writel(0x1e0a4616, RCB_REG(0x2b14));
259 writel(0x40000005, RCB_REG(0x2b24));
260 writel(0x0005db01, RCB_REG(0x2b20));
261 writel(0x05145005, RCB_REG(0x3a80));
262 writel(0x00001005, RCB_REG(0x3a84));
263 setbits_le32(RCB_REG(0x33d4), 0x2fff2fb1);
264 setbits_le32(RCB_REG(0x33c8), 0x00008000);
267 static int pch_type(struct udevice *dev)
271 dm_pci_read_config16(dev, PCI_DEVICE_ID, &type);
276 /* Return 1 if PCH type is WildcatPoint */
277 static int pch_is_wpt(struct udevice *dev)
279 return ((pch_type(dev) & 0xfff0) == 0x9cc0) ? 1 : 0;
282 /* Return 1 if PCH type is WildcatPoint ULX */
283 static int pch_is_wpt_ulx(struct udevice *dev)
285 u16 lpcid = pch_type(dev);
288 case PCH_WPT_BDW_Y_SAMPLE:
289 case PCH_WPT_BDW_Y_PREMIUM:
290 case PCH_WPT_BDW_Y_BASE:
297 static u32 pch_read_soft_strap(int id)
299 clrbits_le32(SPI_REG(SPIBAR_FDOC), 0x00007ffc);
300 setbits_le32(SPI_REG(SPIBAR_FDOC), 0x00004000 | id * 4);
302 return readl(SPI_REG(SPIBAR_FDOD));
305 static void pch_enable_mphy(struct udevice *dev)
307 u32 data_and = 0xffffffff;
308 u32 data_or = (1 << 14) | (1 << 13) | (1 << 12);
311 if (pch_is_wpt(dev)) {
312 data_and &= ~((1 << 7) | (1 << 6) | (1 << 3));
313 data_or |= (1 << 5) | (1 << 4);
315 if (pch_is_wpt_ulx(dev)) {
316 /* Check if SATA and USB3 MPHY are enabled */
317 u32 strap19 = pch_read_soft_strap(19);
318 strap19 &= ((1 << 31) | (1 << 30));
322 debug("Enable ULX MPHY PG control in single domain\n");
323 } else if (strap19 == 0) {
324 debug("Enable ULX MPHY PG control in split domains\n");
326 debug("Invalid PCH Soft Strap 19 configuration\n");
333 pch_iobp_update(0xCF000000, data_and, data_or);
336 static void pch_init_deep_sx(bool deep_sx_enable_ac, bool deep_sx_enable_dc)
338 if (deep_sx_enable_ac) {
339 setbits_le32(RCB_REG(DEEP_S3_POL), DEEP_S3_EN_AC);
340 setbits_le32(RCB_REG(DEEP_S5_POL), DEEP_S5_EN_AC);
343 if (deep_sx_enable_dc) {
344 setbits_le32(RCB_REG(DEEP_S3_POL), DEEP_S3_EN_DC);
345 setbits_le32(RCB_REG(DEEP_S5_POL), DEEP_S5_EN_DC);
348 if (deep_sx_enable_ac || deep_sx_enable_dc) {
349 setbits_le32(RCB_REG(DEEP_SX_CONFIG),
350 DEEP_SX_WAKE_PIN_EN | DEEP_SX_GP27_PIN_EN);
354 /* Power Management init */
355 static void pch_pm_init(struct udevice *dev)
357 debug("PCH PM init\n");
359 pch_init_deep_sx(false, false);
360 pch_enable_mphy(dev);
361 pch_pm_init_magic(dev);
363 if (pch_is_wpt(dev)) {
364 setbits_le32(RCB_REG(0x33e0), 1 << 4 | 1 << 1);
365 setbits_le32(RCB_REG(0x2b1c), 1 << 22 | 1 << 14 | 1 << 13);
366 writel(0x16bf0002, RCB_REG(0x33e4));
367 setbits_le32(RCB_REG(0x33e4), 0x1);
370 pch_iobp_update(0xCA000000, ~0UL, 0x00000009);
372 /* Set RCBA 0x2b1c[29]=1 if DSP disabled */
373 if (readl(RCB_REG(FD)) & PCH_DISABLE_ADSPD)
374 setbits_le32(RCB_REG(0x2b1c), 1 << 29);
377 static void pch_cg_init(struct udevice *dev)
379 struct udevice *bus = pci_get_controller(dev);
385 setbits_le32(RCB_REG(0x2234), 0xf);
387 dm_pci_read_config16(dev, GEN_PMCON_1, ®16);
388 reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */
393 reg16 |= 1 << 5 | 1 << 6 | 1 << 7 | 1 << 12;
394 reg16 |= 1 << 2; /* PCI CLKRUN# Enable */
395 dm_pci_write_config16(dev, GEN_PMCON_1, reg16);
398 * RCBA + 0x2614[27:25,14:13,10,8] = 101,11,1,1
399 * RCBA + 0x2614[23:16] = 0x20
400 * RCBA + 0x2614[30:28] = 0x0
401 * RCBA + 0x2614[26] = 1 (IF 0:2.0@0x08 >= 0x0b)
403 clrsetbits_le32(RCB_REG(0x2614), 0x64ff0000, 0x0a206500);
405 /* Check for 0:2.0@0x08 >= 0x0b */
406 pci_bus_read_config(bus, PCI_BDF(0, 0x2, 0), 0x8, &val, PCI_SIZE_8);
407 if (pch_is_wpt(dev) || val >= 0x0b)
408 setbits_le32(RCB_REG(0x2614), 1 << 26);
410 setbits_le32(RCB_REG(0x900), 0x0000031f);
412 reg32 = readl(RCB_REG(CG));
413 if (readl(RCB_REG(0x3454)) & (1 << 4))
414 reg32 &= ~(1 << 29); /* LPC Dynamic */
416 reg32 |= (1 << 29); /* LPC Dynamic */
417 reg32 |= 1 << 31; /* LP LPC */
418 reg32 |= 1 << 30; /* LP BLA */
419 if (readl(RCB_REG(0x3454)) & (1 << 4))
423 reg32 |= 1 << 28; /* GPIO Dynamic */
424 reg32 |= 1 << 27; /* HPET Dynamic */
425 reg32 |= 1 << 26; /* Generic Platform Event Clock */
426 if (readl(RCB_REG(BUC)) & PCH_DISABLE_GBE)
427 reg32 |= 1 << 23; /* GbE Static */
428 if (readl(RCB_REG(FD)) & PCH_DISABLE_HD_AUDIO)
429 reg32 |= 1 << 21; /* HDA Static */
430 reg32 |= 1 << 22; /* HDA Dynamic */
431 writel(reg32, RCB_REG(CG));
435 clrsetbits_le32(RCB_REG(0x3434), 0x1f, 0x17);
437 setbits_le32(RCB_REG(0x3434), 0x7);
440 setbits_le32(RCB_REG(0x38c0), 0x3c07);
442 pch_iobp_update(0xCE00C000, ~1UL, 0x00000000);
445 static void systemagent_init(void)
447 /* Enable Power Aware Interrupt Routing */
448 clrsetbits_8(MCHBAR_REG(MCH_PAIR), 0x7, 0x4); /* Fixed Priority */
451 * Set bits 0+1 of BIOS_RESET_CPL to indicate to the CPU
452 * that BIOS has initialized memory and power management
454 setbits_8(MCHBAR_REG(BIOS_RESET_CPL), 3);
455 debug("Set BIOS_RESET_CPL\n");
457 /* Configure turbo power limits 1ms after reset complete bit */
460 cpu_set_power_limits(28);
463 /* Enable LTR Auto Mode for D21:F1-F6 */
464 static void serialio_d21_ltr(u32 bar0)
466 /* 1. Program BAR0 + 808h[2] = 0b */
467 clrbits_le32(bar0 + SIO_REG_PPR_GEN, SIO_REG_PPR_GEN_LTR_MODE_MASK);
469 /* 2. Program BAR0 + 804h[1:0] = 00b */
470 clrbits_le32(bar0 + SIO_REG_PPR_RST, SIO_REG_PPR_RST_ASSERT);
472 /* 3. Program BAR0 + 804h[1:0] = 11b */
473 setbits_le32(bar0 + SIO_REG_PPR_RST, SIO_REG_PPR_RST_ASSERT);
475 /* 4. Program BAR0 + 814h[31:0] = 00000000h */
476 writel(0, bar0 + SIO_REG_AUTO_LTR);
479 /* Select I2C voltage of 1.8V or 3.3V */
480 static void serialio_i2c_voltage_sel(u32 bar0, uint voltage)
482 clrsetbits_le32(bar0 + SIO_REG_PPR_GEN, SIO_REG_PPR_GEN_VOLTAGE_MASK,
483 SIO_REG_PPR_GEN_VOLTAGE(voltage));
486 /* Put Serial IO D21:F0-F6 device into desired mode */
487 static void serialio_d21_mode(int sio_index, int int_pin, bool acpi_mode)
489 u32 portctrl = SIO_IOBP_PORTCTRL_PM_CAP_PRSNT;
492 portctrl |= SIO_IOBP_PORTCTRL_SNOOP_SELECT(1);
494 /* Set interrupt pin */
495 portctrl |= SIO_IOBP_PORTCTRL_INT_PIN(int_pin);
498 /* Enable ACPI interrupt mode */
499 portctrl |= SIO_IOBP_PORTCTRL_ACPI_IRQ_EN;
502 pch_iobp_update(SIO_IOBP_PORTCTRLX(sio_index), 0, portctrl);
505 /* Init sequence to be run once, done as part of D21:F0 (SDMA) init */
506 static void serialio_init_once(bool acpi_mode)
509 /* Enable ACPI IRQ for IRQ13, IRQ7, IRQ6, IRQ5 in RCBA */
510 setbits_le32(RCB_REG(ACPIIRQEN),
511 1 << 13 | 1 << 7 | 1 << 6 | 1 << 5);
514 /* Program IOBP CB000154h[12,9:8,4:0] = 1001100011111b */
515 pch_iobp_update(SIO_IOBP_GPIODF, ~0x0000131f, 0x0000131f);
517 /* Program IOBP CB000180h[5:0] = 111111b (undefined register) */
518 pch_iobp_update(0xcb000180, ~0x0000003f, 0x0000003f);
522 * pch_serialio_init() - set up serial I/O devices
524 * @return 0 if OK, -ve on error
526 static int pch_serialio_init(void)
528 struct udevice *dev, *hda;
529 bool acpi_mode = true;
533 ret = uclass_find_first_device(UCLASS_I2C, &dev);
536 bar0 = dm_pci_read_bar32(dev, 0);
539 bar1 = dm_pci_read_bar32(dev, 1);
543 serialio_init_once(acpi_mode);
544 serialio_d21_mode(SIO_ID_SDMA, SIO_PIN_INTB, acpi_mode);
546 serialio_d21_ltr(bar0);
547 serialio_i2c_voltage_sel(bar0, 1); /* Select 1.8V always */
548 serialio_d21_mode(SIO_ID_I2C0, SIO_PIN_INTC, acpi_mode);
549 setbits_le32(bar1 + PCH_PCS, PCH_PCS_PS_D3HOT);
551 clrbits_le32(bar1 + PCH_PCS, PCH_PCS_PS_D3HOT);
553 setbits_le32(bar0 + SIO_REG_PPR_CLOCK, SIO_REG_PPR_CLOCK_EN);
555 /* Manually find the High-definition audio, to turn it off */
556 ret = dm_pci_bus_find_bdf(PCI_BDF(0, 0x1b, 0), &hda);
559 dm_pci_clrset_config8(hda, 0x43, 0, 0x6f);
561 /* Route I/O buffers to ADSP function */
562 dm_pci_clrset_config8(hda, 0x42, 0, 1 << 7 | 1 << 6);
563 log_debug("HDA disabled, I/O buffers routed to ADSP\n");
568 static int broadwell_pch_init(struct udevice *dev)
572 /* Enable upper 128 bytes of CMOS */
573 setbits_le32(RCB_REG(RC), 1 << 2);
576 * TODO: TCO timer halt - this hangs
577 * setio_16(ACPI_BASE_ADDRESS + TCO1_CNT, TCO_TMR_HLT);
580 /* Disable unused device (always) */
581 setbits_le32(RCB_REG(FD), PCH_DISABLE_ALWAYS);
585 /* Interrupt configuration */
588 /* Initialize power management */
589 ret = pch_power_options(dev);
594 ret = pch_serialio_init();
602 static int broadwell_pch_probe(struct udevice *dev)
604 if (CONFIG_IS_ENABLED(X86_32BIT_INIT)) {
605 if (!(gd->flags & GD_FLG_RELOC))
606 return broadwell_pch_early_init(dev);
608 return broadwell_pch_init(dev);
609 } else if (IS_ENABLED(CONFIG_SPL) && !IS_ENABLED(CONFIG_SPL_BUILD)) {
610 return broadwell_pch_init(dev);
616 static int broadwell_pch_get_spi_base(struct udevice *dev, ulong *sbasep)
620 dm_pci_read_config32(dev, PCH_RCBA, &rcba);
621 /* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable */
622 rcba = rcba & 0xffffc000;
623 *sbasep = rcba + 0x3800;
628 static int broadwell_set_spi_protect(struct udevice *dev, bool protect)
630 return lpc_set_spi_protect(dev, BIOS_CTRL, protect);
633 static int broadwell_get_gpio_base(struct udevice *dev, u32 *gbasep)
635 dm_pci_read_config32(dev, GPIO_BASE, gbasep);
636 *gbasep &= PCI_BASE_ADDRESS_IO_MASK;
641 static int broadwell_ioctl(struct udevice *dev, enum pch_req_t req, void *data,
645 case PCH_REQ_PMBASE_INFO: {
646 struct pch_pmbase_info *pm = data;
649 /* Find the base address of the powermanagement registers */
650 ret = dm_pci_read_config16(dev, 0x40, &pm->base);
654 pm->gpio0_en_ofs = GPE0_EN(0);
655 pm->pm1_sts_ofs = PM1_STS;
656 pm->pm1_cnt_ofs = PM1_CNT;
665 static const struct pch_ops broadwell_pch_ops = {
666 .get_spi_base = broadwell_pch_get_spi_base,
667 .set_spi_protect = broadwell_set_spi_protect,
668 .get_gpio_base = broadwell_get_gpio_base,
669 .ioctl = broadwell_ioctl,
672 static const struct udevice_id broadwell_pch_ids[] = {
673 { .compatible = "intel,broadwell-pch" },
677 U_BOOT_DRIVER(broadwell_pch) = {
678 .name = "broadwell_pch",
680 .of_match = broadwell_pch_ids,
681 .probe = broadwell_pch_probe,
682 .ops = &broadwell_pch_ops,