[U-Boot] [PATCH 20/33] x86: ivybridge: Add additional LPC init
Simon Glass
sjg at chromium.org
Wed Nov 12 01:18:08 CET 2014
Set up all the remaining pieces of the LPC (low-pin-count) peripheral in
PCH (Peripheral Controller Hub).
Signed-off-by: Simon Glass <sjg at chromium.org>
---
arch/x86/cpu/ivybridge/bd82x6x.c | 6 +
arch/x86/cpu/ivybridge/lpc.c | 529 +++++++++++++++++++++++++++-
doc/device-tree-bindings/misc/intel-lpc.txt | 47 ++-
3 files changed, 578 insertions(+), 4 deletions(-)
diff --git a/arch/x86/cpu/ivybridge/bd82x6x.c b/arch/x86/cpu/ivybridge/bd82x6x.c
index fab7c53..be4db74 100644
--- a/arch/x86/cpu/ivybridge/bd82x6x.c
+++ b/arch/x86/cpu/ivybridge/bd82x6x.c
@@ -88,6 +88,12 @@ void bd82x6x_pci_bus_enable_resources(pci_dev_t dev)
int bd82x6x_init_pci_devices(void)
{
+ struct pci_controller *hose;
+
+ hose = pci_bus_to_hose(0);
+ lpc_enable(PCH_LPC_DEV);
+ lpc_init(hose, PCH_LPC_DEV);
+
return 0;
}
diff --git a/arch/x86/cpu/ivybridge/lpc.c b/arch/x86/cpu/ivybridge/lpc.c
index 621ef2c..03b22e9 100644
--- a/arch/x86/cpu/ivybridge/lpc.c
+++ b/arch/x86/cpu/ivybridge/lpc.c
@@ -9,10 +9,458 @@
#include <common.h>
#include <errno.h>
#include <fdtdec.h>
+#include <rtc.h>
#include <pci.h>
+#include <asm/acpi.h>
+#include <asm/i8259.h>
+#include <asm/io.h>
+#include <asm/ioapic.h>
+#include <asm/isa_dma.h>
#include <asm/pci.h>
#include <asm/arch/pch.h>
+#define NMI_OFF 0
+
+#define ENABLE_ACPI_MODE_IN_COREBOOT 0
+#define TEST_SMM_FLASH_LOCKDOWN 0
+
+static int pch_enable_apic(pci_dev_t dev)
+{
+ u32 reg32;
+ int i;
+
+ /* Enable ACPI I/O and power management. Set SCI IRQ to IRQ9 */
+ pci_write_config8(dev, ACPI_CNTL, 0x80);
+
+ writel(0, IO_APIC_INDEX);
+ writel(1 << 25, IO_APIC_DATA);
+
+ /* affirm full set of redirection table entries ("write once") */
+ writel(1, IO_APIC_INDEX);
+ reg32 = readl(IO_APIC_DATA);
+ writel(1, IO_APIC_INDEX);
+ writel(reg32, IO_APIC_DATA);
+
+ writel(0, IO_APIC_INDEX);
+ reg32 = readl(IO_APIC_DATA);
+ debug("PCH APIC ID = %x\n", (reg32 >> 24) & 0x0f);
+ if (reg32 != (1 << 25)) {
+ printf("APIC Error - cannot write to registers\n");
+ return -EPERM;
+ }
+
+ debug("Dumping IOAPIC registers\n");
+ for (i = 0; i < 3; i++) {
+ writel(i, IO_APIC_INDEX);
+ debug(" reg 0x%04x:", i);
+ reg32 = readl(IO_APIC_DATA);
+ debug(" 0x%08x\n", reg32);
+ }
+
+ /* Select Boot Configuration register. */
+ writel(3, IO_APIC_INDEX);
+
+ /* Use Processor System Bus to deliver interrupts. */
+ writel(1, IO_APIC_DATA);
+
+ return 0;
+}
+
+static void pch_enable_serial_irqs(pci_dev_t dev)
+{
+ u32 value;
+
+ /* Set packet length and toggle silent mode bit for one frame. */
+ value = (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0);
+#ifdef CONFIG_SERIRQ_CONTINUOUS_MODE
+ pci_write_config8(dev, SERIRQ_CNTL, value);
+#else
+ pci_write_config8(dev, SERIRQ_CNTL, value | (1 << 6));
+#endif
+}
+
+static int pch_pirq_init(const void *blob, int node, pci_dev_t dev)
+{
+ uint8_t route[8], *ptr;
+
+ if (fdtdec_get_byte_array(blob, node, "intel,pirq-routing", route,
+ sizeof(route)))
+ return -EINVAL;
+ ptr = route;
+ pci_write_config8(dev, PIRQA_ROUT, *ptr++);
+ pci_write_config8(dev, PIRQB_ROUT, *ptr++);
+ pci_write_config8(dev, PIRQC_ROUT, *ptr++);
+ pci_write_config8(dev, PIRQD_ROUT, *ptr++);
+
+ pci_write_config8(dev, PIRQE_ROUT, *ptr++);
+ pci_write_config8(dev, PIRQF_ROUT, *ptr++);
+ pci_write_config8(dev, PIRQG_ROUT, *ptr++);
+ pci_write_config8(dev, PIRQH_ROUT, *ptr++);
+
+ /*
+ * TODO(sjg at chromium.org): U-Boot does not set up the interrupts
+ * here. It's unclear if it is needed
+ */
+ return 0;
+}
+
+static int pch_gpi_routing(const void *blob, int node, pci_dev_t dev)
+{
+ u8 route[16];
+ u32 reg;
+ int gpi;
+
+ if (fdtdec_get_byte_array(blob, node, "intel,gpi-routing", route,
+ sizeof(route)))
+ return -EINVAL;
+
+ for (reg = 0, gpi = 0; gpi < ARRAY_SIZE(route); gpi++)
+ reg |= route[gpi] << (gpi * 2);
+
+ pci_write_config32(dev, 0xb8, reg);
+
+ return 0;
+}
+
+static int pch_power_options(const void *blob, int node, pci_dev_t dev)
+{
+ u8 reg8;
+ u16 reg16, pmbase;
+ u32 reg32;
+ const char *state;
+ int pwr_on;
+ int nmi_option;
+ int ret;
+
+ /*
+ * Which state do we want to goto after g3 (power restored)?
+ * 0 == S0 Full On
+ * 1 == S5 Soft Off
+ *
+ * If the option is not existent (Laptops), use Kconfig setting.
+ * TODO(sjg at chromium.org): Make this configurable
+ */
+ pwr_on = MAINBOARD_POWER_ON;
+
+ reg16 = pci_read_config16(dev, GEN_PMCON_3);
+ reg16 &= 0xfffe;
+ switch (pwr_on) {
+ 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";
+ }
+
+ reg16 &= ~(3 << 4); /* SLP_S4# Assertion Stretch 4s */
+ reg16 |= (1 << 3); /* SLP_S4# Assertion Stretch Enable */
+
+ reg16 &= ~(1 << 10);
+ reg16 |= (1 << 11); /* SLP_S3# Min Assertion Width 50ms */
+
+ reg16 |= (1 << 12); /* Disable SLP stretch after SUS well */
+
+ pci_write_config16(dev, GEN_PMCON_3, reg16);
+ debug("Set power %s after power failure.\n", state);
+
+ /* Set up NMI on errors. */
+ reg8 = inb(0x61);
+ reg8 &= 0x0f; /* Higher Nibble must be 0 */
+ reg8 &= ~(1 << 3); /* IOCHK# NMI Enable */
+ reg8 |= (1 << 2); /* PCI SERR# Disable for now */
+ outb(reg8, 0x61);
+
+ reg8 = inb(0x70);
+ /* TODO(sjg at chromium.org): Make this configurable */
+ nmi_option = NMI_OFF;
+ if (nmi_option) {
+ debug("NMI sources enabled.\n");
+ reg8 &= ~(1 << 7); /* Set NMI. */
+ } else {
+ debug("NMI sources disabled.\n");
+ /* Can't mask NMI from PCI-E and NMI_NOW */
+ reg8 |= (1 << 7);
+ }
+ outb(reg8, 0x70);
+
+ /* Enable CPU_SLP# and Intel Speedstep, set SMI# rate down */
+ reg16 = pci_read_config16(dev, GEN_PMCON_1);
+ reg16 &= ~(3 << 0); /* SMI# rate 1 minute */
+ reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */
+#if DEBUG_PERIODIC_SMIS
+ /* Set DEBUG_PERIODIC_SMIS in pch.h to debug using periodic SMIs */
+ reg16 |= (3 << 0); /* Periodic SMI every 8s */
+#endif
+ pci_write_config16(dev, GEN_PMCON_1, reg16);
+
+ /* Set the board's GPI routing. */
+ ret = pch_gpi_routing(blob, node, dev);
+ if (ret)
+ return ret;
+
+ pmbase = pci_read_config16(dev, 0x40) & 0xfffe;
+
+ writel(pmbase + GPE0_EN, fdtdec_get_int(blob, node,
+ "intel,gpe0-enable", 0));
+ writew(pmbase + ALT_GP_SMI_EN, fdtdec_get_int(blob, node,
+ "intel,alt-gp-smi-enable", 0));
+
+ /* Set up power management block and determine sleep mode */
+ reg32 = inl(pmbase + 0x04); /* PM1_CNT */
+ reg32 &= ~(7 << 10); /* SLP_TYP */
+ reg32 |= (1 << 0); /* SCI_EN */
+ outl(reg32, pmbase + 0x04);
+
+ /* Clear magic status bits to prevent unexpected wake */
+ setbits_le32(RCB_REG(0x3310), (1 << 4) | (1 << 5) | (1 << 0));
+ clrbits_le32(RCB_REG(0x3f02), 0xf);
+
+ return 0;
+}
+
+static void pch_rtc_init(pci_dev_t dev)
+{
+ int rtc_failed;
+ u8 reg8;
+
+ reg8 = pci_read_config8(dev, GEN_PMCON_3);
+ rtc_failed = reg8 & RTC_BATTERY_DEAD;
+ if (rtc_failed) {
+ reg8 &= ~RTC_BATTERY_DEAD;
+ pci_write_config8(dev, GEN_PMCON_3, reg8);
+ }
+ debug("rtc_failed = 0x%x\n", rtc_failed);
+
+#if CONFIG_HAVE_ACPI_RESUME
+ /* Avoid clearing pending interrupts and resetting the RTC control
+ * register in the resume path because the Linux kernel relies on
+ * this to know if it should restart the RTC timerqueue if the wake
+ * was due to the RTC alarm.
+ */
+ if (acpi_get_slp_type() == 3)
+ return;
+#endif
+ rtc_init(rtc_failed);
+}
+
+/* CougarPoint PCH Power Management init */
+static void cpt_pm_init(pci_dev_t dev)
+{
+ debug("CougarPoint PM init\n");
+ pci_write_config8(dev, 0xa9, 0x47);
+ setbits_le32(RCB_REG(0x2238), (1 << 6) | (1 << 0));
+
+ setbits_le32(RCB_REG(0x228c), 1 << 0);
+ setbits_le32(RCB_REG(0x1100), (1 << 13) | (1 << 14));
+ setbits_le32(RCB_REG(0x0900), 1 << 14);
+ writel(0xc0388400, RCB_REG(0x2304));
+ setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18));
+ setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1));
+ clrsetbits_le32(RCB_REG(0x3314), ~0x1f, 0xf);
+ writel(0x050f0000, RCB_REG(0x3318));
+ writel(0x04000000, RCB_REG(0x3324));
+ setbits_le32(RCB_REG(0x3340), 0xfffff);
+ setbits_le32(RCB_REG(0x3344), 1 << 1);
+
+ writel(0x0001c000, RCB_REG(0x3360));
+ writel(0x00061100, RCB_REG(0x3368));
+ writel(0x7f8fdfff, RCB_REG(0x3378));
+ writel(0x000003fc, RCB_REG(0x337c));
+ writel(0x00001000, RCB_REG(0x3388));
+ writel(0x0001c000, RCB_REG(0x3390));
+ writel(0x00000800, RCB_REG(0x33a0));
+ writel(0x00001000, RCB_REG(0x33b0));
+ writel(0x00093900, RCB_REG(0x33c0));
+ writel(0x24653002, RCB_REG(0x33cc));
+ writel(0x062108fe, RCB_REG(0x33d0));
+ clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060);
+ writel(0x01010000, RCB_REG(0x3a28));
+ writel(0x01010404, RCB_REG(0x3a2c));
+ writel(0x01041041, RCB_REG(0x3a80));
+ clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001);
+ setbits_le32(RCB_REG(0x3a84), 1 << 24); /* SATA 2/3 disabled */
+ setbits_le32(RCB_REG(0x3a88), 1 << 0); /* SATA 4/5 disabled */
+ writel(0x00000001, RCB_REG(0x3a6c));
+ clrsetbits_le32(RCB_REG(0x2344), ~0x00ffff00, 0xff00000c);
+ clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20);
+ writel(0, RCB_REG(0x33c8));
+ setbits_le32(RCB_REG(0x21b0), 0xf);
+}
+
+/* PantherPoint PCH Power Management init */
+static void ppt_pm_init(pci_dev_t dev)
+{
+ debug("PantherPoint PM init\n");
+ pci_write_config8(dev, 0xa9, 0x47);
+ setbits_le32(RCB_REG(0x2238), 1 << 0);
+ setbits_le32(RCB_REG(0x228c), 1 << 0);
+ setbits_le16(RCB_REG(0x1100), (1 << 13) | (1 << 14));
+ setbits_le16(RCB_REG(0x0900), 1 << 14);
+ writel(0xc03b8400, RCB_REG(0x2304));
+ setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18));
+ setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1));
+ clrsetbits_le32(RCB_REG(0x3314), 0x1f, 0xf);
+ writel(0x054f0000, RCB_REG(0x3318));
+ writel(0x04000000, RCB_REG(0x3324));
+ setbits_le32(RCB_REG(0x3340), 0xfffff);
+ setbits_le32(RCB_REG(0x3344), (1 << 1) | (1 << 0));
+ writel(0x0001c000, RCB_REG(0x3360));
+ writel(0x00061100, RCB_REG(0x3368));
+ writel(0x7f8fdfff, RCB_REG(0x3378));
+ writel(0x000003fd, RCB_REG(0x337c));
+ writel(0x00001000, RCB_REG(0x3388));
+ writel(0x0001c000, RCB_REG(0x3390));
+ writel(0x00000800, RCB_REG(0x33a0));
+ writel(0x00001000, RCB_REG(0x33b0));
+ writel(0x00093900, RCB_REG(0x33c0));
+ writel(0x24653002, RCB_REG(0x33cc));
+ writel(0x067388fe, RCB_REG(0x33d0));
+ clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060);
+ writel(0x01010000, RCB_REG(0x3a28));
+ writel(0x01010404, RCB_REG(0x3a2c));
+ writel(0x01040000, RCB_REG(0x3a80));
+ clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001);
+ /* SATA 2/3 disabled */
+ setbits_le32(RCB_REG(0x3a84), 1 << 24);
+ /* SATA 4/5 disabled */
+ setbits_le32(RCB_REG(0x3a88), 1 << 0);
+ writel(0x00000001, RCB_REG(0x3a6c));
+ clrsetbits_le32(RCB_REG(0x2344), 0xff0000ff, 0xff00000c);
+ clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20);
+ setbits_le32(RCB_REG(0x33a4), (1 << 0));
+ writel(0, RCB_REG(0x33c8));
+ setbits_le32(RCB_REG(0x21b0), 0xf);
+}
+
+static void enable_hpet(void)
+{
+ /* Move HPET to default address 0xfed00000 and enable it */
+ clrsetbits_le32(RCB_REG(HPTC), 3 << 0, 1 << 7);
+}
+
+static void enable_clock_gating(pci_dev_t dev)
+{
+ u32 reg32;
+ u16 reg16;
+
+ setbits_le32(RCB_REG(0x2234), 0xf);
+
+ reg16 = pci_read_config16(dev, GEN_PMCON_1);
+ reg16 |= (1 << 2) | (1 << 11);
+ pci_write_config16(dev, GEN_PMCON_1, reg16);
+
+ pch_iobp_update(0xEB007F07, ~0UL, (1 << 31));
+ pch_iobp_update(0xEB004000, ~0UL, (1 << 7));
+ pch_iobp_update(0xEC007F07, ~0UL, (1 << 31));
+ pch_iobp_update(0xEC004000, ~0UL, (1 << 7));
+
+ reg32 = readl(RCB_REG(CG));
+ reg32 |= (1 << 31);
+ reg32 |= (1 << 29) | (1 << 28);
+ reg32 |= (1 << 27) | (1 << 26) | (1 << 25) | (1 << 24);
+ reg32 |= (1 << 16);
+ reg32 |= (1 << 17);
+ reg32 |= (1 << 18);
+ reg32 |= (1 << 22);
+ reg32 |= (1 << 23);
+ reg32 &= ~(1 << 20);
+ reg32 |= (1 << 19);
+ reg32 |= (1 << 0);
+ reg32 |= (0xf << 1);
+ writel(reg32, RCB_REG(CG));
+
+ setbits_le32(RCB_REG(0x38c0), 0x7);
+ setbits_le32(RCB_REG(0x36d4), 0x6680c004);
+ setbits_le32(RCB_REG(0x3564), 0x3);
+}
+
+#if CONFIG_HAVE_SMI_HANDLER
+static void pch_lock_smm(pci_dev_t dev)
+{
+#if TEST_SMM_FLASH_LOCKDOWN
+ u8 reg8;
+#endif
+
+ if (acpi_slp_type != 3) {
+#if ENABLE_ACPI_MODE_IN_COREBOOT
+ debug("Enabling ACPI via APMC:\n");
+ outb(0xe1, 0xb2); /* Enable ACPI mode */
+ debug("done.\n");
+#else
+ debug("Disabling ACPI via APMC:\n");
+ outb(0x1e, 0xb2); /* Disable ACPI mode */
+ debug("done.\n");
+#endif
+ }
+
+ /* Don't allow evil boot loaders, kernels, or
+ * userspace applications to deceive us:
+ */
+ smm_lock();
+
+#if TEST_SMM_FLASH_LOCKDOWN
+ /* Now try this: */
+ debug("Locking BIOS to RO... ");
+ reg8 = pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
+ debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off",
+ (reg8 & 1) ? "rw" : "ro");
+ reg8 &= ~(1 << 0); /* clear BIOSWE */
+ pci_write_config8(dev, 0xdc, reg8);
+ reg8 |= (1 << 1); /* set BLE */
+ pci_write_config8(dev, 0xdc, reg8);
+ debug("ok.\n");
+ reg8 = pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
+ debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off",
+ (reg8 & 1) ? "rw" : "ro");
+
+ debug("Writing:\n");
+ writeb(0, 0xfff00000);
+ debug("Testing:\n");
+ reg8 |= (1 << 0); /* set BIOSWE */
+ pci_write_config8(dev, 0xdc, reg8);
+
+ reg8 = pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
+ debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off",
+ (reg8 & 1) ? "rw" : "ro");
+ debug("Done.\n");
+#endif
+}
+#endif
+
+static void pch_disable_smm_only_flashing(pci_dev_t dev)
+{
+ u8 reg8;
+
+ debug("Enabling BIOS updates outside of SMM... ");
+ reg8 = pci_read_config8(dev, 0xdc); /* BIOS_CNTL */
+ reg8 &= ~(1 << 5);
+ pci_write_config8(dev, 0xdc, reg8);
+}
+
+static void pch_fixups(pci_dev_t dev)
+{
+ u8 gen_pmcon_2;
+
+ /* Indicate DRAM init done for MRC S3 to know it can resume */
+ gen_pmcon_2 = pci_read_config8(dev, GEN_PMCON_2);
+ gen_pmcon_2 |= (1 << 7);
+ pci_write_config8(dev, GEN_PMCON_2, gen_pmcon_2);
+
+ /* Enable DMI ASPM in the PCH */
+ clrbits_le32(RCB_REG(0x2304), 1 << 10);
+ setbits_le32(RCB_REG(0x21a4), (1 << 11) | (1 << 10));
+ setbits_le32(RCB_REG(0x21a8), 0x3);
+}
+
int lpc_early_init(const void *blob, int node, pci_dev_t dev)
{
struct reg_info {
@@ -22,7 +470,7 @@ int lpc_early_init(const void *blob, int node, pci_dev_t dev)
int count;
int i;
- count = fdtdec_get_int_array_count(blob, node, "gen-dec",
+ count = fdtdec_get_int_array_count(blob, node, "intel,gen-dec",
(u32 *)values, sizeof(values) / sizeof(u32));
if (count < 0)
return -EINVAL;
@@ -46,3 +494,82 @@ int lpc_early_init(const void *blob, int node, pci_dev_t dev)
return 0;
}
+
+int lpc_init(struct pci_controller *hose, pci_dev_t dev)
+{
+ const void *blob = gd->fdt_blob;
+ int node;
+
+ debug("pch: lpc_init\n");
+ pci_config_fixed(hose, dev, 0, 0);
+ pci_config_fixed(hose, dev, 1, 0xff800000);
+ pci_config_fixed(hose, dev, 2, 0xfec00000);
+ pci_config_fixed(hose, dev, 3, 0x800);
+ pci_config_fixed(hose, dev, 4, 0x900);
+
+ node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_LPC);
+ if (node < 0)
+ return -ENOENT;
+
+ /* Set the value for PCI command register. */
+ pci_write_config16(dev, PCI_COMMAND, 0x000f);
+
+ /* IO APIC initialization. */
+ pch_enable_apic(dev);
+
+ pch_enable_serial_irqs(dev);
+
+ /* Setup the PIRQ. */
+ pch_pirq_init(blob, node, dev);
+
+ /* Setup power options. */
+ pch_power_options(blob, node, dev);
+
+ /* Initialize power management */
+ switch (pch_silicon_type()) {
+ case PCH_TYPE_CPT: /* CougarPoint */
+ cpt_pm_init(dev);
+ break;
+ case PCH_TYPE_PPT: /* PantherPoint */
+ ppt_pm_init(dev);
+ break;
+ default:
+ printf("Unknown Chipset: %#02x.%dx\n", PCI_DEV(dev),
+ PCI_FUNC(dev));
+ return -ENOSYS;
+ }
+
+ /* Initialize the real time clock. */
+ pch_rtc_init(dev);
+
+ /* Initialize ISA DMA. */
+ isa_dma_init();
+
+ /* Initialize the High Precision Event Timers, if present. */
+ enable_hpet();
+
+ /* Initialize Clock Gating */
+ enable_clock_gating(dev);
+
+ i8259_setup();
+
+ /* Interrupt 9 should be level triggered (SCI). The OS might do this */
+ i8259_configure_irq_trigger(9, true);
+
+ pch_disable_smm_only_flashing(dev);
+
+#if CONFIG_HAVE_SMI_HANDLER
+ pch_lock_smm(dev);
+#endif
+
+ pch_fixups(dev);
+
+ return 0;
+}
+
+void lpc_enable(pci_dev_t dev)
+{
+ /* Enable PCH Display Port */
+ writew(0x0010, RCB_REG(DISPBDF));
+ setbits_le32(RCB_REG(FD2), PCH_ENABLE_DBDF);
+}
diff --git a/doc/device-tree-bindings/misc/intel-lpc.txt b/doc/device-tree-bindings/misc/intel-lpc.txt
index 7e1b389..ba6ca9d 100644
--- a/doc/device-tree-bindings/misc/intel-lpc.txt
+++ b/doc/device-tree-bindings/misc/intel-lpc.txt
@@ -6,10 +6,37 @@ Count device is as follows:
Required properties :
- compatible = "intel,lpc"
-- gen-dec : Specifies the values for the gen-dec registers. Up to four cell
- pairs can be provided - the first of each pair is the base address and
+- intel,alt-gp-smi-enable : Enable SMI sources. This cell is written to the
+ ALT_GP_SMI_EN register
+- intel,gen-dec : Specifies the values for the gen-dec registers. Up to four
+ cell pairs can be provided - the first of each pair is the base address and
the second is the size. These are written into the GENx_DEC registers of
the LPC device
+- intel,gpi-routing : Specifies the GPI routing. There are 16 cells, valid
+ values are:
+ 0 No effect (default)
+ 1 SMI# (if corresponding ALT_GPI_SMI_EN bit is also set)
+ 2 SCI (if corresponding GPIO_EN bit is also set)
+- intel,pirq-routing : Speciffies the routing IRQ number for each of PIRQA-H,
+ one cell for each.
+ 0x00 - 0000 = Reserved
+ 0x01 - 0001 = Reserved
+ 0x02 - 0010 = Reserved
+ 0x03 - 0011 = IRQ3
+ 0x04 - 0100 = IRQ4
+ 0x05 - 0101 = IRQ5
+ 0x06 - 0110 = IRQ6
+ 0x07 - 0111 = IRQ7
+ 0x08 - 1000 = Reserved
+ 0x09 - 1001 = IRQ9
+ 0x0A - 1010 = IRQ10
+ 0x0B - 1011 = IRQ11
+ 0x0C - 1100 = IRQ12
+ 0x0D - 1101 = Reserved
+ 0x0E - 1110 = IRQ14
+ 0x0F - 1111 = IRQ15
+ PIRQ[n]_ROUT[7] - PIRQ Routing Control
+ 0x80 - The PIRQ is not routed.
Example
@@ -19,5 +46,19 @@ lpc {
compatible = "intel,lpc";
#address-cells = <1>;
#size-cells = <1>;
- gen-dec = <0x800 0xfc 0x900 0xfc>;
+ intel,gen-dec = <0x800 0xfc 0x900 0xfc>;
+
+ intel,pirq-routing = <0x8b 0x8a 0x8b 0x8b
+ 0x80 0x80 0x80 0x80>;
+ /*
+ * GPI routing
+ * 0 No effect (default)
+ * 1 SMI# (if corresponding ALT_GPI_SMI_EN bit is
+ * also set)
+ * 2 SCI (if corresponding GPIO_EN bit is also set)
+ */
+ intel,gpi-routing = <0 0 0 0 0 0 0 2
+ 1 0 0 0 0 0 0 0>;
+ /* Enable EC SMI source */
+ intel,alt-gp-smi-enable = <0x0100>;
};
--
2.1.0.rc2.206.gedb03e5
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