[U-Boot] [PATCH 52/69] x86: broadwell: Add a PCH driver
Simon Glass
sjg at chromium.org
Mon Mar 7 03:28:35 CET 2016
Add a driver for the broadwell low-power platform controller hub.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
arch/x86/cpu/broadwell/Makefile | 2 +
arch/x86/cpu/broadwell/iobp.c | 144 ++++++++
arch/x86/cpu/broadwell/pch.c | 540 ++++++++++++++++++++++++++++++
arch/x86/include/asm/arch-broadwell/pch.h | 153 +++++++++
4 files changed, 839 insertions(+)
create mode 100644 arch/x86/cpu/broadwell/iobp.c
create mode 100644 arch/x86/cpu/broadwell/pch.c
create mode 100644 arch/x86/include/asm/arch-broadwell/pch.h
diff --git a/arch/x86/cpu/broadwell/Makefile b/arch/x86/cpu/broadwell/Makefile
index c7ef630..128829a 100644
--- a/arch/x86/cpu/broadwell/Makefile
+++ b/arch/x86/cpu/broadwell/Makefile
@@ -5,3 +5,5 @@
#
obj-y += cpu.o
+obj-y += iobp.o
+obj-y += pch.o
diff --git a/arch/x86/cpu/broadwell/iobp.c b/arch/x86/cpu/broadwell/iobp.c
new file mode 100644
index 0000000..5eed849
--- /dev/null
+++ b/arch/x86/cpu/broadwell/iobp.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2016 Google, Inc
+ *
+ * Modified from coreboot
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <asm/intel_regs.h>
+#include <asm/io.h>
+#include <asm/arch/pch.h>
+
+#define IOBP_RETRY 1000
+
+/* IO Buffer Programming */
+#define IOBPIRI 0x2330
+#define IOBPD 0x2334
+#define IOBPS 0x2338
+#define IOBPS_READY 0x0001
+#define IOBPS_TX_MASK 0x0006
+#define IOBPS_MASK 0xff00
+#define IOBPS_READ 0x0600
+#define IOBPS_WRITE 0x0700
+#define IOBPU 0x233a
+#define IOBPU_MAGIC 0xf000
+#define IOBP_PCICFG_READ 0x0400
+#define IOBP_PCICFG_WRITE 0x0500
+
+static inline int iobp_poll(void)
+{
+ unsigned try;
+
+ for (try = IOBP_RETRY; try > 0; try--) {
+ u16 status = readw(RCB_REG(IOBPS));
+ if ((status & IOBPS_READY) == 0)
+ return 1;
+ udelay(10);
+ }
+
+ printf("IOBP: timeout waiting for transaction to complete\n");
+ return 0;
+}
+
+int pch_iobp_trans_start(u32 address, int op)
+{
+ if (!iobp_poll())
+ return 0;
+
+ /* Set the address */
+ writel(address, RCB_REG(IOBPIRI));
+
+ /* READ OPCODE */
+ clrsetbits_le16(RCB_REG(IOBPS), IOBPS_MASK, op);
+
+ return 1;
+}
+
+int pch_iobp_trans_finish(void)
+{
+ u16 status;
+
+ /* Undocumented magic */
+ writew(IOBPU_MAGIC, RCB_REG(IOBPU));
+
+ /* Set ready bit */
+ setbits_le16(RCB_REG(IOBPS), IOBPS_READY);
+
+ if (!iobp_poll())
+ return 1;
+
+ /* Check for successful transaction */
+ status = readw(RCB_REG(IOBPS));
+ if (status & IOBPS_TX_MASK)
+ return 1;
+
+ return 0;
+}
+
+u32 pch_iobp_read(u32 address)
+{
+ if (!pch_iobp_trans_start(address, IOBPS_READ))
+ return 0;
+ if (pch_iobp_trans_finish()) {
+ printf("IOBP: read 0x%08x failed\n", address);
+ return 0;
+ }
+
+ /* Read IOBP data */
+ return readl(RCB_REG(IOBPD));
+}
+
+int pch_iobp_write(u32 address, u32 data)
+{
+ if (!pch_iobp_trans_start(address, IOBPS_WRITE))
+ return -EIO;
+
+ writel(data, RCB_REG(IOBPD));
+
+ if (pch_iobp_trans_finish()) {
+ printf("IOBP: write 0x%08x failed\n", address);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+int pch_iobp_update(u32 address, u32 andvalue, u32 orvalue)
+{
+ u32 data = pch_iobp_read(address);
+
+ /* Update the data */
+ data &= andvalue;
+ data |= orvalue;
+
+ return pch_iobp_write(address, data);
+}
+
+int pch_iobp_exec(u32 addr, u16 op_code, u8 route_id, u32 *data, u8 *resp)
+{
+ if (!data || !resp)
+ return 0;
+
+ *resp = -1;
+ if (!iobp_poll())
+ return -EIO;
+
+ writel(addr, RCB_REG(IOBPIRI));
+ clrsetbits_le16(RCB_REG(IOBPS), 0xff00, op_code);
+ writew(IOBPU_MAGIC | route_id, RCB_REG(IOBPU));
+
+ writel(*data, RCB_REG(IOBPD));
+ /* Set IOBPS[0] to trigger IOBP transaction*/
+ setbits_le16(RCB_REG(IOBPS), 1);
+
+ if (!iobp_poll())
+ return -EIO;
+
+ *resp = (readw(RCB_REG(IOBPS)) & IOBPS_TX_MASK) >> 1;
+ *data = readl(RCB_REG(IOBPD));
+
+ return 0;
+}
diff --git a/arch/x86/cpu/broadwell/pch.c b/arch/x86/cpu/broadwell/pch.c
new file mode 100644
index 0000000..8f9bee6
--- /dev/null
+++ b/arch/x86/cpu/broadwell/pch.c
@@ -0,0 +1,540 @@
+/*
+ * Copyright (c) 2016 Google, Inc
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <pch.h>
+#include <asm/cpu.h>
+#include <asm/gpio.h>
+#include <asm/i8259.h>
+#include <asm/intel_regs.h>
+#include <asm/io.h>
+#include <asm/ioapic.h>
+#include <asm/lpc_common.h>
+#include <asm/pch_common.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/iomap.h>
+#include <asm/arch/pch.h>
+#include <asm/arch/pm.h>
+#include <asm/arch/rcb.h>
+#include <asm/arch/spi.h>
+
+#define BIOS_CTRL 0xdc
+
+bool cpu_is_ult(void)
+{
+ u32 fm = cpu_get_family_model();
+
+ return fm == BROADWELL_FAMILY_ULT || fm == HASWELL_FAMILY_ULT;
+}
+
+static int broadwell_pch_early_init(struct udevice *dev)
+{
+ struct gpio_desc desc;
+ struct udevice *bus;
+ pci_dev_t bdf;
+ int ret;
+
+ dm_pci_write_config32(dev, PCH_RCBA, RCB_BASE_ADDRESS | 1);
+
+ dm_pci_write_config32(dev, PMBASE, ACPI_BASE_ADDRESS | 1);
+ dm_pci_write_config8(dev, ACPI_CNTL, ACPI_EN);
+ dm_pci_write_config32(dev, GPIO_BASE, GPIO_BASE_ADDRESS | 1);
+ dm_pci_write_config8(dev, GPIO_CNTL, GPIO_EN);
+
+ /* Enable IOAPIC */
+ writew(0x1000, RCB_REG(OIC));
+ /* Read back for posted write */
+ readw(RCB_REG(OIC));
+
+ /* Set HPET address and enable it */
+ clrsetbits_le32(RCB_REG(HPTC), 3, 1 << 7);
+ /* Read back for posted write */
+ readl(RCB_REG(HPTC));
+ /* Enable HPET to start counter */
+ setbits_le32(HPET_BASE_ADDRESS + 0x10, 1 << 0);
+
+ setbits_le32(RCB_REG(GCS), 1 << 5);
+
+ /*
+ * Enable PP3300_AUTOBAHN_EN after initial GPIO setup
+ * to prevent possible brownout. This will cause the GPIOs to be set
+ * up if it has not been done already.
+ */
+ ret = gpio_request_by_name(dev, "power-enable-gpio", 0, &desc,
+ GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
+ if (ret)
+ return ret;
+
+ /* 8.14 Additional PCI Express Programming Steps, step #1 */
+ bdf = PCI_BDF(0, 0x1c, 0);
+ bus = pci_get_controller(dev);
+ pci_bus_clrset_config32(bus, bdf, 0xf4, 0x60, 0);
+ pci_bus_clrset_config32(bus, bdf, 0xf4, 0x80, 0x80);
+ pci_bus_clrset_config32(bus, bdf, 0xe2, 0x30, 0x30);
+
+ return 0;
+}
+
+static void pch_misc_init(struct udevice *dev)
+{
+ /* Setup SLP signal assertion, SLP_S4=4s, SLP_S3=50ms */
+ dm_pci_clrset_config8(dev, GEN_PMCON_3, 3 << 4 | 1 << 10,
+ 1 << 3 | 1 << 11 | 1 << 12);
+ /* Prepare sleep mode */
+ clrsetio_le32(ACPI_BASE_ADDRESS + PM1_CNT, SLP_TYP, SCI_EN);
+
+ /* Setup NMI on errors, disable SERR */
+ clrsetio_8(0x61, 0xf0, 1 << 2);
+ /* Disable NMI sources */
+ setio_8(0x70, 1 << 7);
+ /* Indicate DRAM init done for MRC */
+ dm_pci_clrset_config8(dev, GEN_PMCON_2, 0, 1 << 7);
+
+ /* Clear status bits to prevent unexpected wake */
+ setbits_le32(RCB_REG(0x3310), 0x0000002f);
+ clrsetbits_le32(RCB_REG(0x3f02), 0x0000000f, 0);
+ /* Enable PCIe Relaxed Order */
+ setbits_le32(RCB_REG(0x2314), 1 << 31 | 1 << 7);
+ setbits_le32(RCB_REG(0x1114), 1 << 15 | 1 << 14);
+ /* Setup SERIRQ, enable continuous mode */
+ dm_pci_clrset_config8(dev, SERIRQ_CNTL, 0, 1 << 7 | 1 << 6);
+};
+
+static void pch_enable_ioapic(void)
+{
+ u32 reg32;
+
+ io_apic_set_id(0x02);
+
+ /* affirm full set of redirection table entries ("write once") */
+ reg32 = io_apic_read(0x01);
+
+ /* PCH-LP has 39 redirection entries */
+ reg32 &= ~0x00ff0000;
+ reg32 |= 0x00270000;
+
+ io_apic_write(0x01, reg32);
+
+ /*
+ * Select Boot Configuration register (0x03) and
+ * use Processor System Bus (0x01) to deliver interrupts.
+ */
+ io_apic_write(0x03, 0x01);
+}
+
+/* Enable all requested GPE */
+void enable_all_gpe(u32 set1, u32 set2, u32 set3, u32 set4)
+{
+ outl(set1, ACPI_BASE_ADDRESS + GPE0_EN(GPE_31_0));
+ outl(set2, ACPI_BASE_ADDRESS + GPE0_EN(GPE_63_32));
+ outl(set3, ACPI_BASE_ADDRESS + GPE0_EN(GPE_94_64));
+ outl(set4, ACPI_BASE_ADDRESS + GPE0_EN(GPE_STD));
+}
+
+/*
+ * Enable GPIO SMI events - it would be good to put this in the GPIO driver
+ * but it would need a new driver operation.
+ */
+int enable_alt_smi(struct udevice *pch, u32 mask)
+{
+ struct pch_lp_gpio_regs *regs;
+ u32 gpiobase;
+ int ret;
+
+ ret = pch_get_gpio_base(pch, &gpiobase);
+ if (ret) {
+ debug("%s: invalid GPIOBASE address (%08x)\n", __func__,
+ gpiobase);
+ return -EINVAL;
+ }
+
+ regs = (struct pch_lp_gpio_regs *)gpiobase;
+ setio_le32(regs->alt_gpi_smi_en, mask);
+
+ return 0;
+}
+
+static int pch_power_options(struct udevice *dev)
+{
+ int pwr_on_after_power_fail = MAINBOARD_POWER_OFF;
+ const char *state;
+ u32 enable[4];
+ u16 reg16;
+ int ret;
+
+ dm_pci_read_config16(dev, GEN_PMCON_3, ®16);
+ reg16 &= 0xfffe;
+ switch (pwr_on_after_power_fail) {
+ case MAINBOARD_POWER_OFF:
+ reg16 |= 1;
+ state = "off";
+ break;
+ case MAINBOARD_POWER_ON:
+ reg16 &= ~1;
+ state = "on";
+ break;
+ case MAINBOARD_POWER_KEEP:
+ reg16 &= ~1;
+ state = "state keep";
+ break;
+ default:
+ state = "undefined";
+ }
+ dm_pci_write_config16(dev, GEN_PMCON_3, reg16);
+ debug("Set power %s after power failure.\n", state);
+
+ /* GPE setup based on device tree configuration */
+ ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset,
+ "intel,gpe0-en", enable, ARRAY_SIZE(enable));
+ if (ret)
+ return -EINVAL;
+ enable_all_gpe(enable[0], enable[1], enable[2], enable[3]);
+
+ /* SMI setup based on device tree configuration */
+ enable_alt_smi(dev, fdtdec_get_int(gd->fdt_blob, dev->of_offset,
+ "intel,alt-gp-smi-enable", 0));
+
+ return 0;
+}
+
+/* Magic register settings for power management */
+static void pch_pm_init_magic(struct udevice *dev)
+{
+ dm_pci_write_config8(dev, 0xa9, 0x46);
+ clrbits_le32(RCB_REG(0x232c), 1),
+ setbits_le32(RCB_REG(0x1100), 0x0000c13f);
+ clrsetbits_le32(RCB_REG(0x2320), 0x60, 0x10);
+ writel(0x00012fff, RCB_REG(0x3314));
+ clrsetbits_le32(RCB_REG(0x3318), 0x000f0330, 0x0dcf0400);
+ writel(0x04000000, RCB_REG(0x3324));
+ writel(0x00041400, RCB_REG(0x3368));
+ writel(0x3f8ddbff, RCB_REG(0x3388));
+ writel(0x00007001, RCB_REG(0x33ac));
+ writel(0x00181900, RCB_REG(0x33b0));
+ writel(0x00060A00, RCB_REG(0x33c0));
+ writel(0x06200840, RCB_REG(0x33d0));
+ writel(0x01010101, RCB_REG(0x3a28));
+ writel(0x040c0404, RCB_REG(0x3a2c));
+ writel(0x9000000a, RCB_REG(0x3a9c));
+ writel(0x03808033, RCB_REG(0x2b1c));
+ writel(0x80000009, RCB_REG(0x2b34));
+ writel(0x022ddfff, RCB_REG(0x3348));
+ writel(0x00000001, RCB_REG(0x334c));
+ writel(0x0001c000, RCB_REG(0x3358));
+ writel(0x3f8ddbff, RCB_REG(0x3380));
+ writel(0x0001c7e1, RCB_REG(0x3384));
+ writel(0x0001c7e1, RCB_REG(0x338c));
+ writel(0x0001c000, RCB_REG(0x3398));
+ writel(0x00181900, RCB_REG(0x33a8));
+ writel(0x00080000, RCB_REG(0x33dc));
+ writel(0x00000001, RCB_REG(0x33e0));
+ writel(0x0000040c, RCB_REG(0x3a20));
+ writel(0x01010101, RCB_REG(0x3a24));
+ writel(0x01010101, RCB_REG(0x3a30));
+ dm_pci_clrset_config32(dev, 0xac, 0x00200000, 0);
+ setbits_le32(RCB_REG(0x0410), 0x00000003);
+ setbits_le32(RCB_REG(0x2618), 0x08000000);
+ setbits_le32(RCB_REG(0x2300), 0x00000002);
+ setbits_le32(RCB_REG(0x2600), 0x00000008);
+ writel(0x00007001, RCB_REG(0x33b4));
+ writel(0x022ddfff, RCB_REG(0x3350));
+ writel(0x00000001, RCB_REG(0x3354));
+ /* Power Optimizer */
+ setbits_le32(RCB_REG(0x33d4), 0x08000000);
+ /*
+ * This stops the LCD from turning on:
+ * setbits_le32(RCB_REG(0x33c8), 0x08000080);
+ */
+ writel(0x0000883c, RCB_REG(0x2b10));
+ writel(0x1e0a4616, RCB_REG(0x2b14));
+ writel(0x40000005, RCB_REG(0x2b24));
+ writel(0x0005db01, RCB_REG(0x2b20));
+ writel(0x05145005, RCB_REG(0x3a80));
+ writel(0x00001005, RCB_REG(0x3a84));
+ setbits_le32(RCB_REG(0x33d4), 0x2fff2fb1);
+ setbits_le32(RCB_REG(0x33c8), 0x00008000);
+};
+
+static int pch_type(struct udevice *dev)
+{
+ u16 type;
+
+ dm_pci_read_config16(dev, PCI_DEVICE_ID, &type);
+
+ return type;
+}
+
+/* Return 1 if PCH type is WildcatPoint */
+static int pch_is_wpt(struct udevice *dev)
+{
+ return ((pch_type(dev) & 0xfff0) == 0x9cc0) ? 1 : 0;
+}
+
+/* Return 1 if PCH type is WildcatPoint ULX */
+static int pch_is_wpt_ulx(struct udevice *dev)
+{
+ u16 lpcid = pch_type(dev);
+
+ switch (lpcid) {
+ case PCH_WPT_BDW_Y_SAMPLE:
+ case PCH_WPT_BDW_Y_PREMIUM:
+ case PCH_WPT_BDW_Y_BASE:
+ return 1;
+ }
+
+ return 0;
+}
+
+static u32 pch_read_soft_strap(int id)
+{
+ clrbits_le32(SPI_REG(SPIBAR_FDOC), 0x00007ffc);
+ setbits_le32(SPI_REG(SPIBAR_FDOC), 0x00004000 | id * 4);
+
+ return readl(SPI_REG(SPIBAR_FDOD));
+}
+
+static void pch_enable_mphy(struct udevice *dev)
+{
+ u32 data_and = 0xffffffff;
+ u32 data_or = (1 << 14) | (1 << 13) | (1 << 12);
+
+ data_or |= (1 << 0);
+ if (pch_is_wpt(dev)) {
+ data_and &= ~((1 << 7) | (1 << 6) | (1 << 3));
+ data_or |= (1 << 5) | (1 << 4);
+
+ if (pch_is_wpt_ulx(dev)) {
+ /* Check if SATA and USB3 MPHY are enabled */
+ u32 strap19 = pch_read_soft_strap(19);
+ strap19 &= ((1 << 31) | (1 << 30));
+ strap19 >>= 30;
+ if (strap19 == 3) {
+ data_or |= (1 << 3);
+ debug("Enable ULX MPHY PG control in single domain\n");
+ } else if (strap19 == 0) {
+ debug("Enable ULX MPHY PG control in split domains\n");
+ } else {
+ debug("Invalid PCH Soft Strap 19 configuration\n");
+ }
+ } else {
+ data_or |= (1 << 3);
+ }
+ }
+
+ pch_iobp_update(0xCF000000, data_and, data_or);
+}
+
+static void pch_init_deep_sx(bool deep_sx_enable_ac, bool deep_sx_enable_dc)
+{
+ if (deep_sx_enable_ac) {
+ setbits_le32(RCB_REG(DEEP_S3_POL), DEEP_S3_EN_AC);
+ setbits_le32(RCB_REG(DEEP_S5_POL), DEEP_S5_EN_AC);
+ }
+
+ if (deep_sx_enable_dc) {
+ setbits_le32(RCB_REG(DEEP_S3_POL), DEEP_S3_EN_DC);
+ setbits_le32(RCB_REG(DEEP_S5_POL), DEEP_S5_EN_DC);
+ }
+
+ if (deep_sx_enable_ac || deep_sx_enable_dc) {
+ setbits_le32(RCB_REG(DEEP_SX_CONFIG),
+ DEEP_SX_WAKE_PIN_EN | DEEP_SX_GP27_PIN_EN);
+ }
+}
+
+/* Power Management init */
+static void pch_pm_init(struct udevice *dev)
+{
+ debug("PCH PM init\n");
+
+ pch_init_deep_sx(false, false);
+ pch_enable_mphy(dev);
+ pch_pm_init_magic(dev);
+
+ if (pch_is_wpt(dev)) {
+ setbits_le32(RCB_REG(0x33e0), 1 << 4 | 1 << 1);
+ setbits_le32(RCB_REG(0x2b1c), 1 << 22 | 1 << 14 | 1 << 13);
+ writel(0x16bf0002, RCB_REG(0x33e4));
+ setbits_le32(RCB_REG(0x33e4), 0x1);
+ }
+
+ pch_iobp_update(0xCA000000, ~0UL, 0x00000009);
+
+ /* Set RCBA 0x2b1c[29]=1 if DSP disabled */
+ if (readl(RCB_REG(FD)) & PCH_DISABLE_ADSPD)
+ setbits_le32(RCB_REG(0x2b1c), 1 << 29);
+}
+
+static void pch_cg_init(struct udevice *dev)
+{
+ struct udevice *bus = pci_get_controller(dev);
+ u32 reg32;
+ u16 reg16;
+ ulong val;
+
+ /* DMI */
+ setbits_le32(RCB_REG(0x2234), 0xf);
+
+ dm_pci_read_config16(dev, GEN_PMCON_1, ®16);
+ reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */
+ if (pch_is_wpt(dev))
+ reg16 &= ~(1 << 11);
+ else
+ reg16 |= 1 << 11;
+ reg16 |= 1 << 5 | 1 << 6 | 1 << 7 | 1 << 12;
+ reg16 |= 1 << 2; /* PCI CLKRUN# Enable */
+ dm_pci_write_config16(dev, GEN_PMCON_1, reg16);
+
+ /*
+ * RCBA + 0x2614[27:25,14:13,10,8] = 101,11,1,1
+ * RCBA + 0x2614[23:16] = 0x20
+ * RCBA + 0x2614[30:28] = 0x0
+ * RCBA + 0x2614[26] = 1 (IF 0:2.0 at 0x08 >= 0x0b)
+ */
+ clrsetbits_le32(RCB_REG(0x2614), 0x64ff0000, 0x0a206500);
+
+ /* Check for 0:2.0 at 0x08 >= 0x0b */
+ pci_bus_read_config(bus, PCI_BDF(0, 0x2, 0), 0x8, &val, PCI_SIZE_8);
+ if (pch_is_wpt(dev) || val >= 0x0b)
+ setbits_le32(RCB_REG(0x2614), 1 << 26);
+
+ setbits_le32(RCB_REG(0x900), 0x0000031f);
+
+ reg32 = readl(RCB_REG(CG));
+ if (readl(RCB_REG(0x3454)) & (1 << 4))
+ reg32 &= ~(1 << 29); /* LPC Dynamic */
+ else
+ reg32 |= (1 << 29); /* LPC Dynamic */
+ reg32 |= 1 << 31; /* LP LPC */
+ reg32 |= 1 << 30; /* LP BLA */
+ if (readl(RCB_REG(0x3454)) & (1 << 4))
+ reg32 &= ~(1 << 29);
+ else
+ reg32 |= 1 << 29;
+ reg32 |= 1 << 28; /* GPIO Dynamic */
+ reg32 |= 1 << 27; /* HPET Dynamic */
+ reg32 |= 1 << 26; /* Generic Platform Event Clock */
+ if (readl(RCB_REG(BUC)) & PCH_DISABLE_GBE)
+ reg32 |= 1 << 23; /* GbE Static */
+ if (readl(RCB_REG(FD)) & PCH_DISABLE_HD_AUDIO)
+ reg32 |= 1 << 21; /* HDA Static */
+ reg32 |= 1 << 22; /* HDA Dynamic */
+ writel(reg32, RCB_REG(CG));
+
+ /* PCH-LP LPC */
+ if (pch_is_wpt(dev))
+ clrsetbits_le32(RCB_REG(0x3434), 0x1f, 0x17);
+ else
+ setbits_le32(RCB_REG(0x3434), 0x7);
+
+ /* SPI */
+ setbits_le32(RCB_REG(0x38c0), 0x3c07);
+
+ pch_iobp_update(0xCE00C000, ~1UL, 0x00000000);
+}
+
+static void systemagent_init(void)
+{
+ /* Enable Power Aware Interrupt Routing */
+ clrsetbits_8(MCHBAR_REG(MCH_PAIR), 0x7, 0x4); /* Fixed Priority */
+
+ /*
+ * Set bits 0+1 of BIOS_RESET_CPL to indicate to the CPU
+ * that BIOS has initialized memory and power management
+ */
+ setbits_8(MCHBAR_REG(BIOS_RESET_CPL), 3);
+ debug("Set BIOS_RESET_CPL\n");
+
+ /* Configure turbo power limits 1ms after reset complete bit */
+ mdelay(1);
+
+ cpu_set_power_limits(28);
+}
+
+static int broadwell_pch_init(struct udevice *dev)
+{
+ int ret;
+
+ /* Enable upper 128 bytes of CMOS */
+ setbits_le32(RCB_REG(RC), 1 << 2);
+
+ /*
+ * TODO: TCO timer halt - this hangs
+ * setio_le16(ACPI_BASE_ADDRESS + TCO1_CNT, TCO_TMR_HLT);
+ */
+
+ /* Disable unused device (always) */
+ setbits_le32(RCB_REG(FD), PCH_DISABLE_ALWAYS);
+
+ pch_misc_init(dev);
+
+ /* Interrupt configuration */
+ pch_enable_ioapic();
+
+ /* Initialize power management */
+ ret = pch_power_options(dev);
+ if (ret)
+ return ret;
+ pch_pm_init(dev);
+ pch_cg_init(dev);
+ systemagent_init();
+
+ return 0;
+}
+
+static int broadwell_pch_probe(struct udevice *dev)
+{
+ if (!(gd->flags & GD_FLG_RELOC))
+ return broadwell_pch_early_init(dev);
+ else
+ return broadwell_pch_init(dev);
+}
+
+static int broadwell_pch_get_spi_base(struct udevice *dev, ulong *sbasep)
+{
+ u32 rcba;
+
+ dm_pci_read_config32(dev, PCH_RCBA, &rcba);
+ /* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable */
+ rcba = rcba & 0xffffc000;
+ *sbasep = rcba + 0x3800;
+
+ return 0;
+}
+
+static int broadwell_set_spi_protect(struct udevice *dev, bool protect)
+{
+ return lpc_set_spi_protect(dev, BIOS_CTRL, protect);
+}
+
+static int broadwell_get_gpio_base(struct udevice *dev, u32 *gbasep)
+{
+ dm_pci_read_config32(dev, GPIO_BASE, gbasep);
+ *gbasep &= PCI_BASE_ADDRESS_IO_MASK;
+
+ return 0;
+}
+
+static const struct pch_ops broadwell_pch_ops = {
+ .get_spi_base = broadwell_pch_get_spi_base,
+ .set_spi_protect = broadwell_set_spi_protect,
+ .get_gpio_base = broadwell_get_gpio_base,
+};
+
+static const struct udevice_id broadwell_pch_ids[] = {
+ { .compatible = "intel,broadwell-pch" },
+ { }
+};
+
+U_BOOT_DRIVER(broadwell_pch) = {
+ .name = "broadwell_pch",
+ .id = UCLASS_PCH,
+ .of_match = broadwell_pch_ids,
+ .probe = broadwell_pch_probe,
+ .ops = &broadwell_pch_ops,
+};
diff --git a/arch/x86/include/asm/arch-broadwell/pch.h b/arch/x86/include/asm/arch-broadwell/pch.h
new file mode 100644
index 0000000..5d2667a
--- /dev/null
+++ b/arch/x86/include/asm/arch-broadwell/pch.h
@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2016 Google, Inc
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef __asm_arch_pch_h
+#define __asm_arch_pch_h
+
+/* CPU bus clock is fixed at 100MHz */
+#define CPU_BCLK 100
+
+#define PMBASE 0x40
+#define ACPI_CNTL 0x44
+#define ACPI_EN (1 << 7)
+
+#define GPIO_BASE 0x48 /* LPC GPIO Base Address Register */
+#define GPIO_CNTL 0x4C /* LPC GPIO Control Register */
+#define GPIO_EN (1 << 4)
+
+#define PCIEXBAR 0x60
+
+#define PCH_DEV_LPC PCI_BDF(0, 0x1f, 0)
+
+/* RCB registers */
+#define OIC 0x31fe /* 16bit */
+#define HPTC 0x3404 /* 32bit */
+#define FD 0x3418 /* 32bit */
+
+/* Function Disable 1 RCBA 0x3418 */
+#define PCH_DISABLE_ALWAYS (1 << 0)
+
+/* PM registers */
+#define TCO1_CNT 0x60
+#define TCO_TMR_HLT (1 << 11)
+
+
+/* Device 0:0.0 PCI configuration space */
+
+#define EPBAR 0x40
+#define MCHBAR 0x48
+#define PCIEXBAR 0x60
+#define DMIBAR 0x68
+#define GGC 0x50 /* GMCH Graphics Control */
+#define DEVEN 0x54 /* Device Enable */
+#define DEVEN_D7EN (1 << 14)
+#define DEVEN_D4EN (1 << 7)
+#define DEVEN_D3EN (1 << 5)
+#define DEVEN_D2EN (1 << 4)
+#define DEVEN_D1F0EN (1 << 3)
+#define DEVEN_D1F1EN (1 << 2)
+#define DEVEN_D1F2EN (1 << 1)
+#define DEVEN_D0EN (1 << 0)
+#define DPR 0x5c
+#define DPR_EPM (1 << 2)
+#define DPR_PRS (1 << 1)
+#define DPR_SIZE_MASK 0xff0
+
+#define MCHBAR_PEI_VERSION 0x5034
+#define BIOS_RESET_CPL 0x5da8
+#define EDRAMBAR 0x5408
+#define MCH_PAIR 0x5418
+#define GDXCBAR 0x5420
+
+#define PAM0 0x80
+#define PAM1 0x81
+#define PAM2 0x82
+#define PAM3 0x83
+#define PAM4 0x84
+#define PAM5 0x85
+#define PAM6 0x86
+
+/* PCODE MMIO communications live in the MCHBAR. */
+#define BIOS_MAILBOX_INTERFACE 0x5da4
+#define MAILBOX_RUN_BUSY (1 << 31)
+#define MAILBOX_BIOS_CMD_READ_PCS 1
+#define MAILBOX_BIOS_CMD_WRITE_PCS 2
+#define MAILBOX_BIOS_CMD_READ_CALIBRATION 0x509
+#define MAILBOX_BIOS_CMD_FSM_MEASURE_INTVL 0x909
+#define MAILBOX_BIOS_CMD_READ_PCH_POWER 0xa
+#define MAILBOX_BIOS_CMD_READ_PCH_POWER_EXT 0xb
+#define MAILBOX_BIOS_CMD_READ_C9C10_VOLTAGE 0x26
+#define MAILBOX_BIOS_CMD_WRITE_C9C10_VOLTAGE 0x27
+/* Errors are returned back in bits 7:0. */
+#define MAILBOX_BIOS_ERROR_NONE 0
+#define MAILBOX_BIOS_ERROR_INVALID_COMMAND 1
+#define MAILBOX_BIOS_ERROR_TIMEOUT 2
+#define MAILBOX_BIOS_ERROR_ILLEGAL_DATA 3
+#define MAILBOX_BIOS_ERROR_RESERVED 4
+#define MAILBOX_BIOS_ERROR_ILLEGAL_VR_ID 5
+#define MAILBOX_BIOS_ERROR_VR_INTERFACE_LOCKED 6
+#define MAILBOX_BIOS_ERROR_VR_ERROR 7
+/* Data is passed through bits 31:0 of the data register. */
+#define BIOS_MAILBOX_DATA 0x5da0
+
+/* SATA IOBP Registers */
+#define SATA_IOBP_SP0_SECRT88 0xea002688
+#define SATA_IOBP_SP1_SECRT88 0xea002488
+
+#define SATA_SECRT88_VADJ_MASK 0xff
+#define SATA_SECRT88_VADJ_SHIFT 16
+
+#define SATA_IOBP_SP0DTLE_DATA 0xea002550
+#define SATA_IOBP_SP0DTLE_EDGE 0xea002554
+#define SATA_IOBP_SP1DTLE_DATA 0xea002750
+#define SATA_IOBP_SP1DTLE_EDGE 0xea002754
+
+#define SATA_DTLE_MASK 0xF
+#define SATA_DTLE_DATA_SHIFT 24
+#define SATA_DTLE_EDGE_SHIFT 16
+
+/* Power Management */
+#define GEN_PMCON_1 0xa0
+#define SMI_LOCK (1 << 4)
+#define GEN_PMCON_2 0xa2
+#define SYSTEM_RESET_STS (1 << 4)
+#define THERMTRIP_STS (1 << 3)
+#define SYSPWR_FLR (1 << 1)
+#define PWROK_FLR (1 << 0)
+#define GEN_PMCON_3 0xa4
+#define SUS_PWR_FLR (1 << 14)
+#define GEN_RST_STS (1 << 9)
+#define RTC_BATTERY_DEAD (1 << 2)
+#define PWR_FLR (1 << 1)
+#define SLEEP_AFTER_POWER_FAIL (1 << 0)
+#define GEN_PMCON_LOCK 0xa6
+#define SLP_STR_POL_LOCK (1 << 2)
+#define ACPI_BASE_LOCK (1 << 1)
+#define PMIR 0xac
+#define PMIR_CF9LOCK (1 << 31)
+#define PMIR_CF9GR (1 << 20)
+
+/* Broadwell PCH (Wildcat Point) */
+#define PCH_WPT_HSW_U_SAMPLE 0x9cc1
+#define PCH_WPT_BDW_U_SAMPLE 0x9cc2
+#define PCH_WPT_BDW_U_PREMIUM 0x9cc3
+#define PCH_WPT_BDW_U_BASE 0x9cc5
+#define PCH_WPT_BDW_Y_SAMPLE 0x9cc6
+#define PCH_WPT_BDW_Y_PREMIUM 0x9cc7
+#define PCH_WPT_BDW_Y_BASE 0x9cc9
+#define PCH_WPT_BDW_H 0x9ccb
+
+#define SA_IGD_OPROM_VENDEV 0x80860406
+
+/* Dynamically determine if the part is ULT */
+bool cpu_is_ult(void);
+
+u32 pch_iobp_read(u32 address);
+int pch_iobp_write(u32 address, u32 data);
+int pch_iobp_update(u32 address, u32 andvalue, u32 orvalue);
+int pch_iobp_exec(u32 addr, u16 op_dcode, u8 route_id, u32 *data, u8 *resp);
+
+#endif
--
2.7.0.rc3.207.g0ac5344
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