LXR uboot/arch/x86/cpu/broadwell/pch.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2016 Google, Inc
   4 */
   5
   6#include <common.h>
   7#include <dm.h>
   8#include <log.h>
   9#include <pch.h>
  10#include <asm/cpu.h>
  11#include <asm/global_data.h>
  12#include <asm/gpio.h>
  13#include <asm/i8259.h>
  14#include <asm/intel_regs.h>
  15#include <asm/io.h>
  16#include <asm/ioapic.h>
  17#include <asm/lpc_common.h>
  18#include <asm/pch_common.h>
  19#include <asm/arch/cpu.h>
  20#include <asm/arch/gpio.h>
  21#include <asm/arch/iomap.h>
  22#include <asm/arch/pch.h>
  23#include <asm/arch/pm.h>
  24#include <asm/arch/rcb.h>
  25#include <asm/arch/serialio.h>
  26#include <asm/arch/spi.h>
  27#include <dm/uclass-internal.h>
  28#include <linux/delay.h>
  29
  30#define BIOS_CTRL       0xdc
  31
  32bool cpu_is_ult(void)
  33{
  34        u32 fm = cpu_get_family_model();
  35
  36        return fm == BROADWELL_FAMILY_ULT || fm == HASWELL_FAMILY_ULT;
  37}
  38
  39static int broadwell_pch_early_init(struct udevice *dev)
  40{
  41        struct gpio_desc desc;
  42        struct udevice *bus;
  43        pci_dev_t bdf;
  44        int ret;
  45
  46        dm_pci_write_config32(dev, PCH_RCBA, RCB_BASE_ADDRESS | 1);
  47
  48        dm_pci_write_config32(dev, PMBASE, ACPI_BASE_ADDRESS | 1);
  49        dm_pci_write_config8(dev, ACPI_CNTL, ACPI_EN);
  50        dm_pci_write_config32(dev, GPIO_BASE, GPIO_BASE_ADDRESS | 1);
  51        dm_pci_write_config8(dev, GPIO_CNTL, GPIO_EN);
  52
  53        /* Enable IOAPIC */
  54        writew(0x1000, RCB_REG(OIC));
  55        /* Read back for posted write */
  56        readw(RCB_REG(OIC));
  57
  58        /* Set HPET address and enable it */
  59        clrsetbits_le32(RCB_REG(HPTC), 3, 1 << 7);
  60        /* Read back for posted write */
  61        readl(RCB_REG(HPTC));
  62        /* Enable HPET to start counter */
  63        setbits_le32(HPET_BASE_ADDRESS + 0x10, 1 << 0);
  64
  65        setbits_le32(RCB_REG(GCS), 1 << 5);
  66
  67        /*
  68         * Enable PP3300_AUTOBAHN_EN after initial GPIO setup
  69         * to prevent possible brownout. This will cause the GPIOs to be set
  70         * up if it has not been done already.
  71         */
  72        ret = gpio_request_by_name(dev, "power-enable-gpio", 0, &desc,
  73                                   GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
  74        if (ret)
  75                return ret;
  76
  77        /* 8.14 Additional PCI Express Programming Steps, step #1 */
  78        bdf = PCI_BDF(0, 0x1c, 0);
  79        bus = pci_get_controller(dev);
  80        pci_bus_clrset_config32(bus, bdf, 0xf4, 0x60, 0);
  81        pci_bus_clrset_config32(bus, bdf, 0xf4, 0x80, 0x80);
  82        pci_bus_clrset_config32(bus, bdf, 0xe2, 0x30, 0x30);
  83
  84        return 0;
  85}
  86
  87static void pch_misc_init(struct udevice *dev)
  88{
  89        /* Setup SLP signal assertion, SLP_S4=4s, SLP_S3=50ms */
  90        dm_pci_clrset_config8(dev, GEN_PMCON_3, 3 << 4 | 1 << 10,
  91                              1 << 3 | 1 << 11 | 1 << 12);
  92        /* Prepare sleep mode */
  93        clrsetio_32(ACPI_BASE_ADDRESS + PM1_CNT, SLP_TYP, SCI_EN);
  94
  95        /* Setup NMI on errors, disable SERR */
  96        clrsetio_8(0x61, 0xf0, 1 << 2);
  97        /* Disable NMI sources */
  98        setio_8(0x70, 1 << 7);
  99        /* Indicate DRAM init done for MRC */
 100        dm_pci_clrset_config8(dev, GEN_PMCON_2, 0, 1 << 7);
 101
 102        /* Clear status bits to prevent unexpected wake */
 103        setbits_le32(RCB_REG(0x3310), 0x0000002f);
 104        clrsetbits_le32(RCB_REG(0x3f02), 0x0000000f, 0);
 105        /* Enable PCIe Relaxed Order */
 106        setbits_le32(RCB_REG(0x2314), 1 << 31 | 1 << 7);
 107        setbits_le32(RCB_REG(0x1114), 1 << 15 | 1 << 14);
 108        /* Setup SERIRQ, enable continuous mode */
 109        dm_pci_clrset_config8(dev, SERIRQ_CNTL, 0, 1 << 7 | 1 << 6);
 110};
 111
 112static void pch_enable_ioapic(void)
 113{
 114        u32 reg32;
 115
 116        /* Make sure this is a unique ID within system */
 117        io_apic_set_id(0x04);
 118
 119        /* affirm full set of redirection table entries ("write once") */
 120        reg32 = io_apic_read(0x01);
 121
 122        /* PCH-LP has 39 redirection entries */
 123        reg32 &= ~0x00ff0000;
 124        reg32 |= 0x00270000;
 125
 126        io_apic_write(0x01, reg32);
 127
 128        /*
 129         * Select Boot Configuration register (0x03) and
 130         * use Processor System Bus (0x01) to deliver interrupts.
 131         */
 132        io_apic_write(0x03, 0x01);
 133}
 134
 135/* Enable all requested GPE */
 136void enable_all_gpe(u32 set1, u32 set2, u32 set3, u32 set4)
 137{
 138        outl(set1, ACPI_BASE_ADDRESS + GPE0_EN(GPE_31_0));
 139        outl(set2, ACPI_BASE_ADDRESS + GPE0_EN(GPE_63_32));
 140        outl(set3, ACPI_BASE_ADDRESS + GPE0_EN(GPE_94_64));
 141        outl(set4, ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD));
 142}
 143
 144/*
 145 * Enable GPIO SMI events - it would be good to put this in the GPIO driver
 146 * but it would need a new driver operation.
 147 */
 148int enable_alt_smi(struct udevice *pch, u32 mask)
 149{
 150        struct pch_lp_gpio_regs *regs;
 151        u32 gpiobase;
 152        int ret;
 153
 154        ret = pch_get_gpio_base(pch, &gpiobase);
 155        if (ret) {
 156                debug("%s: invalid GPIOBASE address (%08x)\n", __func__,
 157                      gpiobase);
 158                return -EINVAL;
 159        }
 160
 161        regs = (struct pch_lp_gpio_regs *)gpiobase;
 162        setio_32(regs->alt_gpi_smi_en, mask);
 163
 164        return 0;
 165}
 166
 167static int pch_power_options(struct udevice *dev)
 168{
 169        int pwr_on_after_power_fail = MAINBOARD_POWER_OFF;
 170        const char *state;
 171        u32 enable[4];
 172        u16 reg16;
 173        int ret;
 174
 175        dm_pci_read_config16(dev, GEN_PMCON_3, &reg16);
 176        reg16 &= 0xfffe;
 177        switch (pwr_on_after_power_fail) {
 178        case MAINBOARD_POWER_OFF:
 179                reg16 |= 1;
 180                state = "off";
 181                break;
 182        case MAINBOARD_POWER_ON:
 183                reg16 &= ~1;
 184                state = "on";
 185                break;
 186        case MAINBOARD_POWER_KEEP:
 187                reg16 &= ~1;
 188                state = "state keep";
 189                break;
 190        default:
 191                state = "undefined";
 192        }
 193        dm_pci_write_config16(dev, GEN_PMCON_3, reg16);
 194        debug("Set power %s after power failure.\n", state);
 195
 196        /* GPE setup based on device tree configuration */
 197        ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev),
 198                                   "intel,gpe0-en", enable, ARRAY_SIZE(enable));
 199        if (ret)
 200                return -EINVAL;
 201        enable_all_gpe(enable[0], enable[1], enable[2], enable[3]);
 202
 203        /* SMI setup based on device tree configuration */
 204        enable_alt_smi(dev, fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
 205                                           "intel,alt-gp-smi-enable", 0));
 206
 207        return 0;
 208}
 209
 210/* Magic register settings for power management */
 211static void pch_pm_init_magic(struct udevice *dev)
 212{
 213        dm_pci_write_config8(dev, 0xa9, 0x46);
 214        clrbits_le32(RCB_REG(0x232c), 1),
 215        setbits_le32(RCB_REG(0x1100), 0x0000c13f);
 216        clrsetbits_le32(RCB_REG(0x2320), 0x60, 0x10);
 217        writel(0x00012fff, RCB_REG(0x3314));
 218        clrsetbits_le32(RCB_REG(0x3318), 0x000f0330, 0x0dcf0400);
 219        writel(0x04000000, RCB_REG(0x3324));
 220        writel(0x00041400, RCB_REG(0x3368));
 221        writel(0x3f8ddbff, RCB_REG(0x3388));
 222        writel(0x00007001, RCB_REG(0x33ac));
 223        writel(0x00181900, RCB_REG(0x33b0));
 224        writel(0x00060A00, RCB_REG(0x33c0));
 225        writel(0x06200840, RCB_REG(0x33d0));
 226        writel(0x01010101, RCB_REG(0x3a28));
 227        writel(0x040c0404, RCB_REG(0x3a2c));
 228        writel(0x9000000a, RCB_REG(0x3a9c));
 229        writel(0x03808033, RCB_REG(0x2b1c));
 230        writel(0x80000009, RCB_REG(0x2b34));
 231        writel(0x022ddfff, RCB_REG(0x3348));
 232        writel(0x00000001, RCB_REG(0x334c));
 233        writel(0x0001c000, RCB_REG(0x3358));
 234        writel(0x3f8ddbff, RCB_REG(0x3380));
 235        writel(0x0001c7e1, RCB_REG(0x3384));
 236        writel(0x0001c7e1, RCB_REG(0x338c));
 237        writel(0x0001c000, RCB_REG(0x3398));
 238        writel(0x00181900, RCB_REG(0x33a8));
 239        writel(0x00080000, RCB_REG(0x33dc));
 240        writel(0x00000001, RCB_REG(0x33e0));
 241        writel(0x0000040c, RCB_REG(0x3a20));
 242        writel(0x01010101, RCB_REG(0x3a24));
 243        writel(0x01010101, RCB_REG(0x3a30));
 244        dm_pci_clrset_config32(dev, 0xac, 0x00200000, 0);
 245        setbits_le32(RCB_REG(0x0410), 0x00000003);
 246        setbits_le32(RCB_REG(0x2618), 0x08000000);
 247        setbits_le32(RCB_REG(0x2300), 0x00000002);
 248        setbits_le32(RCB_REG(0x2600), 0x00000008);
 249        writel(0x00007001, RCB_REG(0x33b4));
 250        writel(0x022ddfff, RCB_REG(0x3350));
 251        writel(0x00000001, RCB_REG(0x3354));
 252        /* Power Optimizer */
 253        setbits_le32(RCB_REG(0x33d4), 0x08000000);
 254        /*
 255         * This stops the LCD from turning on:
 256         * setbits_le32(RCB_REG(0x33c8), 0x08000080);
 257         */
 258        writel(0x0000883c, RCB_REG(0x2b10));
 259        writel(0x1e0a4616, RCB_REG(0x2b14));
 260        writel(0x40000005, RCB_REG(0x2b24));
 261        writel(0x0005db01, RCB_REG(0x2b20));
 262        writel(0x05145005, RCB_REG(0x3a80));
 263        writel(0x00001005, RCB_REG(0x3a84));
 264        setbits_le32(RCB_REG(0x33d4), 0x2fff2fb1);
 265        setbits_le32(RCB_REG(0x33c8), 0x00008000);
 266};
 267
 268static int pch_type(struct udevice *dev)
 269{
 270        u16 type;
 271
 272        dm_pci_read_config16(dev, PCI_DEVICE_ID, &type);
 273
 274        return type;
 275}
 276
 277/* Return 1 if PCH type is WildcatPoint */
 278static int pch_is_wpt(struct udevice *dev)
 279{
 280        return ((pch_type(dev) & 0xfff0) == 0x9cc0) ? 1 : 0;
 281}
 282
 283/* Return 1 if PCH type is WildcatPoint ULX */
 284static int pch_is_wpt_ulx(struct udevice *dev)
 285{
 286        u16 lpcid = pch_type(dev);
 287
 288        switch (lpcid) {
 289        case PCH_WPT_BDW_Y_SAMPLE:
 290        case PCH_WPT_BDW_Y_PREMIUM:
 291        case PCH_WPT_BDW_Y_BASE:
 292                return 1;
 293        }
 294
 295        return 0;
 296}
 297
 298static u32 pch_read_soft_strap(int id)
 299{
 300        clrbits_le32(SPI_REG(SPIBAR_FDOC), 0x00007ffc);
 301        setbits_le32(SPI_REG(SPIBAR_FDOC), 0x00004000 | id * 4);
 302
 303        return readl(SPI_REG(SPIBAR_FDOD));
 304}
 305
 306static void pch_enable_mphy(struct udevice *dev)
 307{
 308        u32 data_and = 0xffffffff;
 309        u32 data_or = (1 << 14) | (1 << 13) | (1 << 12);
 310
 311        data_or |= (1 << 0);
 312        if (pch_is_wpt(dev)) {
 313                data_and &= ~((1 << 7) | (1 << 6) | (1 << 3));
 314                data_or |= (1 << 5) | (1 << 4);
 315
 316                if (pch_is_wpt_ulx(dev)) {
 317                        /* Check if SATA and USB3 MPHY are enabled */
 318                        u32 strap19 = pch_read_soft_strap(19);
 319                        strap19 &= ((1 << 31) | (1 << 30));
 320                        strap19 >>= 30;
 321                        if (strap19 == 3) {
 322                                data_or |= (1 << 3);
 323                                debug("Enable ULX MPHY PG control in single domain\n");
 324                        } else if (strap19 == 0) {
 325                                debug("Enable ULX MPHY PG control in split domains\n");
 326                        } else {
 327                                debug("Invalid PCH Soft Strap 19 configuration\n");
 328                        }
 329                } else {
 330                        data_or |= (1 << 3);
 331                }
 332        }
 333
 334        pch_iobp_update(0xCF000000, data_and, data_or);
 335}
 336
 337static void pch_init_deep_sx(bool deep_sx_enable_ac, bool deep_sx_enable_dc)
 338{
 339        if (deep_sx_enable_ac) {
 340                setbits_le32(RCB_REG(DEEP_S3_POL), DEEP_S3_EN_AC);
 341                setbits_le32(RCB_REG(DEEP_S5_POL), DEEP_S5_EN_AC);
 342        }
 343
 344        if (deep_sx_enable_dc) {
 345                setbits_le32(RCB_REG(DEEP_S3_POL), DEEP_S3_EN_DC);
 346                setbits_le32(RCB_REG(DEEP_S5_POL), DEEP_S5_EN_DC);
 347        }
 348
 349        if (deep_sx_enable_ac || deep_sx_enable_dc) {
 350                setbits_le32(RCB_REG(DEEP_SX_CONFIG),
 351                             DEEP_SX_WAKE_PIN_EN | DEEP_SX_GP27_PIN_EN);
 352        }
 353}
 354
 355/* Power Management init */
 356static void pch_pm_init(struct udevice *dev)
 357{
 358        debug("PCH PM init\n");
 359
 360        pch_init_deep_sx(false, false);
 361        pch_enable_mphy(dev);
 362        pch_pm_init_magic(dev);
 363
 364        if (pch_is_wpt(dev)) {
 365                setbits_le32(RCB_REG(0x33e0), 1 << 4 | 1 << 1);
 366                setbits_le32(RCB_REG(0x2b1c), 1 << 22 | 1 << 14 | 1 << 13);
 367                writel(0x16bf0002, RCB_REG(0x33e4));
 368                setbits_le32(RCB_REG(0x33e4), 0x1);
 369        }
 370
 371        pch_iobp_update(0xCA000000, ~0UL, 0x00000009);
 372
 373        /* Set RCBA 0x2b1c[29]=1 if DSP disabled */
 374        if (readl(RCB_REG(FD)) & PCH_DISABLE_ADSPD)
 375                setbits_le32(RCB_REG(0x2b1c), 1 << 29);
 376}
 377
 378static void pch_cg_init(struct udevice *dev)
 379{
 380        struct udevice *bus = pci_get_controller(dev);
 381        u32 reg32;
 382        u16 reg16;
 383        ulong val;
 384
 385        /* DMI */
 386        setbits_le32(RCB_REG(0x2234), 0xf);
 387
 388        dm_pci_read_config16(dev, GEN_PMCON_1, &reg16);
 389        reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */
 390        if (pch_is_wpt(dev))
 391                reg16 &= ~(1 << 11);
 392        else
 393                reg16 |= 1 << 11;
 394        reg16 |= 1 << 5 | 1 << 6 | 1 << 7 | 1 << 12;
 395        reg16 |= 1 << 2; /* PCI CLKRUN# Enable */
 396        dm_pci_write_config16(dev, GEN_PMCON_1, reg16);
 397
 398        /*
 399         * RCBA + 0x2614[27:25,14:13,10,8] = 101,11,1,1
 400         * RCBA + 0x2614[23:16] = 0x20
 401         * RCBA + 0x2614[30:28] = 0x0
 402         * RCBA + 0x2614[26] = 1 (IF 0:2.0@0x08 >= 0x0b)
 403         */
 404        clrsetbits_le32(RCB_REG(0x2614), 0x64ff0000, 0x0a206500);
 405
 406        /* Check for 0:2.0@0x08 >= 0x0b */
 407        pci_bus_read_config(bus, PCI_BDF(0, 0x2, 0), 0x8, &val, PCI_SIZE_8);
 408        if (pch_is_wpt(dev) || val >= 0x0b)
 409                setbits_le32(RCB_REG(0x2614), 1 << 26);
 410
 411        setbits_le32(RCB_REG(0x900), 0x0000031f);
 412
 413        reg32 = readl(RCB_REG(CG));
 414        if (readl(RCB_REG(0x3454)) & (1 << 4))
 415                reg32 &= ~(1 << 29); /* LPC Dynamic */
 416        else
 417                reg32 |= (1 << 29); /* LPC Dynamic */
 418        reg32 |= 1 << 31; /* LP LPC */
 419        reg32 |= 1 << 30; /* LP BLA */
 420        if (readl(RCB_REG(0x3454)) & (1 << 4))
 421                reg32 &= ~(1 << 29);
 422        else
 423                reg32 |= 1 << 29;
 424        reg32 |= 1 << 28; /* GPIO Dynamic */
 425        reg32 |= 1 << 27; /* HPET Dynamic */
 426        reg32 |= 1 << 26; /* Generic Platform Event Clock */
 427        if (readl(RCB_REG(BUC)) & PCH_DISABLE_GBE)
 428                reg32 |= 1 << 23; /* GbE Static */
 429        if (readl(RCB_REG(FD)) & PCH_DISABLE_HD_AUDIO)
 430                reg32 |= 1 << 21; /* HDA Static */
 431        reg32 |= 1 << 22; /* HDA Dynamic */
 432        writel(reg32, RCB_REG(CG));
 433
 434        /* PCH-LP LPC */
 435        if (pch_is_wpt(dev))
 436                clrsetbits_le32(RCB_REG(0x3434), 0x1f, 0x17);
 437        else
 438                setbits_le32(RCB_REG(0x3434), 0x7);
 439
 440        /* SPI */
 441        setbits_le32(RCB_REG(0x38c0), 0x3c07);
 442
 443        pch_iobp_update(0xCE00C000, ~1UL, 0x00000000);
 444}
 445
 446static void systemagent_init(void)
 447{
 448        /* Enable Power Aware Interrupt Routing */
 449        clrsetbits_8(MCHBAR_REG(MCH_PAIR), 0x7, 0x4); /* Fixed Priority */
 450
 451        /*
 452         * Set bits 0+1 of BIOS_RESET_CPL to indicate to the CPU
 453         * that BIOS has initialized memory and power management
 454         */
 455        setbits_8(MCHBAR_REG(BIOS_RESET_CPL), 3);
 456        debug("Set BIOS_RESET_CPL\n");
 457
 458        /* Configure turbo power limits 1ms after reset complete bit */
 459        mdelay(1);
 460
 461        cpu_set_power_limits(28);
 462}
 463
 464/* Enable LTR Auto Mode for D21:F1-F6 */
 465static void serialio_d21_ltr(u32 bar0)
 466{
 467        /* 1. Program BAR0 + 808h[2] = 0b */
 468        clrbits_le32(bar0 + SIO_REG_PPR_GEN, SIO_REG_PPR_GEN_LTR_MODE_MASK);
 469
 470        /* 2. Program BAR0 + 804h[1:0] = 00b */
 471        clrbits_le32(bar0 + SIO_REG_PPR_RST, SIO_REG_PPR_RST_ASSERT);
 472
 473        /* 3. Program BAR0 + 804h[1:0] = 11b */
 474        setbits_le32(bar0 + SIO_REG_PPR_RST, SIO_REG_PPR_RST_ASSERT);
 475
 476        /* 4. Program BAR0 + 814h[31:0] = 00000000h */
 477        writel(0, bar0 + SIO_REG_AUTO_LTR);
 478}
 479
 480/* Select I2C voltage of 1.8V or 3.3V */
 481static void serialio_i2c_voltage_sel(u32 bar0, uint voltage)
 482{
 483        clrsetbits_le32(bar0 + SIO_REG_PPR_GEN, SIO_REG_PPR_GEN_VOLTAGE_MASK,
 484                        SIO_REG_PPR_GEN_VOLTAGE(voltage));
 485}
 486
 487/* Put Serial IO D21:F0-F6 device into desired mode */
 488static void serialio_d21_mode(int sio_index, int int_pin, bool acpi_mode)
 489{
 490        u32 portctrl = SIO_IOBP_PORTCTRL_PM_CAP_PRSNT;
 491
 492        /* Snoop select 1 */
 493        portctrl |= SIO_IOBP_PORTCTRL_SNOOP_SELECT(1);
 494
 495        /* Set interrupt pin */
 496        portctrl |= SIO_IOBP_PORTCTRL_INT_PIN(int_pin);
 497
 498        if (acpi_mode) {
 499                /* Enable ACPI interrupt mode */
 500                portctrl |= SIO_IOBP_PORTCTRL_ACPI_IRQ_EN;
 501        }
 502
 503        pch_iobp_update(SIO_IOBP_PORTCTRLX(sio_index), 0, portctrl);
 504}
 505
 506/* Init sequence to be run once, done as part of D21:F0 (SDMA) init */
 507static void serialio_init_once(bool acpi_mode)
 508{
 509        if (acpi_mode) {
 510                /* Enable ACPI IRQ for IRQ13, IRQ7, IRQ6, IRQ5 in RCBA */
 511                setbits_le32(RCB_REG(ACPIIRQEN),
 512                             1 << 13 | 1 << 7 | 1 << 6 | 1 << 5);
 513        }
 514
 515        /* Program IOBP CB000154h[12,9:8,4:0] = 1001100011111b */
 516        pch_iobp_update(SIO_IOBP_GPIODF, ~0x0000131f, 0x0000131f);
 517
 518        /* Program IOBP CB000180h[5:0] = 111111b (undefined register) */
 519        pch_iobp_update(0xcb000180, ~0x0000003f, 0x0000003f);
 520}
 521
 522/**
 523 * pch_serialio_init() - set up serial I/O devices
 524 *
 525 * Return: 0 if OK, -ve on error
 526 */
 527static int pch_serialio_init(void)
 528{
 529        struct udevice *dev, *hda;
 530        bool acpi_mode = true;
 531        u32 bar0, bar1;
 532        int ret;
 533
 534        ret = uclass_find_first_device(UCLASS_I2C, &dev);
 535        if (ret)
 536                return ret;
 537        bar0 = dm_pci_read_bar32(dev, 0);
 538        if (!bar0)
 539                return -EINVAL;
 540        bar1 = dm_pci_read_bar32(dev, 1);
 541        if (!bar1)
 542                return -EINVAL;
 543
 544        serialio_init_once(acpi_mode);
 545        serialio_d21_mode(SIO_ID_SDMA, SIO_PIN_INTB, acpi_mode);
 546
 547        serialio_d21_ltr(bar0);
 548        serialio_i2c_voltage_sel(bar0, 1); /* Select 1.8V always */
 549        serialio_d21_mode(SIO_ID_I2C0, SIO_PIN_INTC, acpi_mode);
 550        setbits_le32(bar1 + PCH_PCS, PCH_PCS_PS_D3HOT);
 551
 552        clrbits_le32(bar1 + PCH_PCS, PCH_PCS_PS_D3HOT);
 553
 554        setbits_le32(bar0 + SIO_REG_PPR_CLOCK, SIO_REG_PPR_CLOCK_EN);
 555
 556        /* Manually find the High-definition audio, to turn it off */
 557        ret = dm_pci_bus_find_bdf(PCI_BDF(0, 0x1b, 0), &hda);
 558        if (ret)
 559                return -ENOENT;
 560        dm_pci_clrset_config8(hda, 0x43, 0, 0x6f);
 561
 562        /* Route I/O buffers to ADSP function */
 563        dm_pci_clrset_config8(hda, 0x42, 0, 1 << 7 | 1 << 6);
 564        log_debug("HDA disabled, I/O buffers routed to ADSP\n");
 565
 566        return 0;
 567}
 568
 569static int broadwell_pch_init(struct udevice *dev)
 570{
 571        int ret;
 572
 573        /* Enable upper 128 bytes of CMOS */
 574        setbits_le32(RCB_REG(RC), 1 << 2);
 575
 576        /*
 577         * TODO: TCO timer halt - this hangs
 578         * setio_16(ACPI_BASE_ADDRESS + TCO1_CNT, TCO_TMR_HLT);
 579         */
 580
 581        /* Disable unused device (always) */
 582        setbits_le32(RCB_REG(FD), PCH_DISABLE_ALWAYS);
 583
 584        pch_misc_init(dev);
 585
 586        /* Interrupt configuration */
 587        pch_enable_ioapic();
 588
 589        /* Initialize power management */
 590        ret = pch_power_options(dev);
 591        if (ret)
 592                return ret;
 593        pch_pm_init(dev);
 594        pch_cg_init(dev);
 595        ret = pch_serialio_init();
 596        if (ret)
 597                return ret;
 598        systemagent_init();
 599
 600        return 0;
 601}
 602
 603static int broadwell_pch_probe(struct udevice *dev)
 604{
 605        if (CONFIG_IS_ENABLED(X86_32BIT_INIT)) {
 606                if (!(gd->flags & GD_FLG_RELOC))
 607                        return broadwell_pch_early_init(dev);
 608                else
 609                        return broadwell_pch_init(dev);
 610        } else if (IS_ENABLED(CONFIG_SPL) && !IS_ENABLED(CONFIG_SPL_BUILD)) {
 611                return broadwell_pch_init(dev);
 612        } else {
 613                return 0;
 614        }
 615}
 616
 617static int broadwell_pch_get_spi_base(struct udevice *dev, ulong *sbasep)
 618{
 619        u32 rcba;
 620
 621        dm_pci_read_config32(dev, PCH_RCBA, &rcba);
 622        /* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable */
 623        rcba = rcba & 0xffffc000;
 624        *sbasep = rcba + 0x3800;
 625
 626        return 0;
 627}
 628
 629static int broadwell_set_spi_protect(struct udevice *dev, bool protect)
 630{
 631        return lpc_set_spi_protect(dev, BIOS_CTRL, protect);
 632}
 633
 634static int broadwell_get_gpio_base(struct udevice *dev, u32 *gbasep)
 635{
 636        dm_pci_read_config32(dev, GPIO_BASE, gbasep);
 637        *gbasep &= PCI_BASE_ADDRESS_IO_MASK;
 638
 639        return 0;
 640}
 641
 642static int broadwell_ioctl(struct udevice *dev, enum pch_req_t req, void *data,
 643                           int size)
 644{
 645        switch (req) {
 646        case PCH_REQ_PMBASE_INFO: {
 647                struct pch_pmbase_info *pm = data;
 648                int ret;
 649
 650                /* Find the base address of the powermanagement registers */
 651                ret = dm_pci_read_config16(dev, 0x40, &pm->base);
 652                if (ret)
 653                        return ret;
 654                pm->base &= 0xfffe;
 655                pm->gpio0_en_ofs = GPE0_EN(0);
 656                pm->pm1_sts_ofs = PM1_STS;
 657                pm->pm1_cnt_ofs = PM1_CNT;
 658
 659                return 0;
 660        }
 661        default:
 662                return -ENOSYS;
 663        }
 664}
 665
 666static const struct pch_ops broadwell_pch_ops = {
 667        .get_spi_base   = broadwell_pch_get_spi_base,
 668        .set_spi_protect = broadwell_set_spi_protect,
 669        .get_gpio_base  = broadwell_get_gpio_base,
 670        .ioctl          = broadwell_ioctl,
 671};
 672
 673static const struct udevice_id broadwell_pch_ids[] = {
 674        { .compatible = "intel,broadwell-pch" },
 675        { }
 676};
 677
 678U_BOOT_DRIVER(broadwell_pch) = {
 679        .name           = "broadwell_pch",
 680        .id             = UCLASS_PCH,
 681        .of_match       = broadwell_pch_ids,
 682        .probe          = broadwell_pch_probe,
 683        .ops            = &broadwell_pch_ops,
 684};
 685