x86: ivybridge: Add PCH init

Add required init for the Intel Platform Controller Hub in ivybridge.

Signed-off-by: Simon Glass <sjg@chromium.org>

arch/x86/cpu/ivybridge/Makefile

@@ -12,6 +12,7 @@ obj-y += early_me.o
 obj-y += lpc.o
 obj-y += me_status.o
 obj-y += microcode_intel.o
+obj-y += pch.o
 obj-y += pci.o
 obj-y += report_platform.o
 obj-y += sdram.o

arch/x86/cpu/ivybridge/pch.c

@@ -0,0 +1,123 @@
+/*
+ * From Coreboot
+ * Copyright (C) 2008-2009 coresystems GmbH
+ * Copyright (C) 2012 The Chromium OS Authors.
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/pci.h>
+#include <asm/arch/pch.h>
+
+static int pch_revision_id = -1;
+static int pch_type = -1;
+
+int pch_silicon_revision(void)
+{
+	pci_dev_t dev;
+
+	dev = PCH_LPC_DEV;
+
+	if (pch_revision_id < 0)
+		pch_revision_id = pci_read_config8(dev, PCI_REVISION_ID);
+	return pch_revision_id;
+}
+
+int pch_silicon_type(void)
+{
+	pci_dev_t dev;
+
+	dev = PCH_LPC_DEV;
+
+	if (pch_type < 0)
+		pch_type = pci_read_config8(dev, PCI_DEVICE_ID + 1);
+	return pch_type;
+}
+
+int pch_silicon_supported(int type, int rev)
+{
+	int cur_type = pch_silicon_type();
+	int cur_rev = pch_silicon_revision();
+
+	switch (type) {
+	case PCH_TYPE_CPT:
+		/* CougarPoint minimum revision */
+		if (cur_type == PCH_TYPE_CPT && cur_rev >= rev)
+			return 1;
+		/* PantherPoint any revision */
+		if (cur_type == PCH_TYPE_PPT)
+			return 1;
+		break;
+
+	case PCH_TYPE_PPT:
+		/* PantherPoint minimum revision */
+		if (cur_type == PCH_TYPE_PPT && cur_rev >= rev)
+			return 1;
+		break;
+	}
+
+	return 0;
+}
+
+#define IOBP_RETRY 1000
+static inline int iobp_poll(void)
+{
+	unsigned try = IOBP_RETRY;
+	u32 data;
+
+	while (try--) {
+		data = readl(RCB_REG(IOBPS));
+		if ((data & 1) == 0)
+			return 1;
+		udelay(10);
+	}
+
+	printf("IOBP timeout\n");
+	return 0;
+}
+
+void pch_iobp_update(u32 address, u32 andvalue, u32 orvalue)
+{
+	u32 data;
+
+	/* Set the address */
+	writel(address, RCB_REG(IOBPIRI));
+
+	/* READ OPCODE */
+	if (pch_silicon_supported(PCH_TYPE_CPT, PCH_STEP_B0))
+		writel(IOBPS_RW_BX, RCB_REG(IOBPS));
+	else
+		writel(IOBPS_READ_AX, RCB_REG(IOBPS));
+	if (!iobp_poll())
+		return;
+
+	/* Read IOBP data */
+	data = readl(RCB_REG(IOBPD));
+	if (!iobp_poll())
+		return;
+
+	/* Check for successful transaction */
+	if ((readl(RCB_REG(IOBPS)) & 0x6) != 0) {
+		printf("IOBP read 0x%08x failed\n", address);
+		return;
+	}
+
+	/* Update the data */
+	data &= andvalue;
+	data |= orvalue;
+
+	/* WRITE OPCODE */
+	if (pch_silicon_supported(PCH_TYPE_CPT, PCH_STEP_B0))
+		writel(IOBPS_RW_BX, RCB_REG(IOBPS));
+	else
+		writel(IOBPS_WRITE_AX, RCB_REG(IOBPS));
+	if (!iobp_poll())
+		return;
+
+	/* Write IOBP data */
+	writel(data, RCB_REG(IOBPD));
+	if (!iobp_poll())
+		return;
+}

arch/x86/include/asm/arch-ivybridge/pch.h

@@ -14,11 +14,31 @@
 
 #include <pci.h>
 
+/* PCH types */
+#define PCH_TYPE_CPT	0x1c /* CougarPoint */
+#define PCH_TYPE_PPT	0x1e /* IvyBridge */
+
+/* PCH stepping values for LPC device */
+#define PCH_STEP_A0	0
+#define PCH_STEP_A1	1
+#define PCH_STEP_B0	2
+#define PCH_STEP_B1	3
+#define PCH_STEP_B2	4
+#define PCH_STEP_B3	5
 #define DEFAULT_GPIOBASE	0x0480
 #define DEFAULT_PMBASE		0x0500
 
 #define SMBUS_IO_BASE		0x0400
 
+int pch_silicon_revision(void);
+int pch_silicon_type(void);
+int pch_silicon_supported(int type, int rev);
+void pch_iobp_update(u32 address, u32 andvalue, u32 orvalue);
+
+#define MAINBOARD_POWER_OFF	0
+#define MAINBOARD_POWER_ON	1
+#define MAINBOARD_POWER_KEEP	2
+
 /* PCI Configuration Space (D30:F0): PCI2PCI */
 #define PSTS	0x06
 #define SMLT	0x1b
@@ -40,6 +60,35 @@
 
 /* PCI Configuration Space (D31:F0): LPC */
 #define PCH_LPC_DEV		PCI_BDF(0, 0x1f, 0)
+#define SERIRQ_CNTL		0x64
+
+#define GEN_PMCON_1		0xa0
+#define GEN_PMCON_2		0xa2
+#define GEN_PMCON_3		0xa4
+#define ETR3			0xac
+#define  ETR3_CWORWRE		(1 << 18)
+#define  ETR3_CF9GR		(1 << 20)
+
+/* GEN_PMCON_3 bits */
+#define RTC_BATTERY_DEAD	(1 << 2)
+#define RTC_POWER_FAILED	(1 << 1)
+#define SLEEP_AFTER_POWER_FAIL	(1 << 0)
+
+#define PMBASE			0x40
+#define ACPI_CNTL		0x44
+#define BIOS_CNTL		0xDC
+#define GPIO_BASE		0x48 /* LPC GPIO Base Address Register */
+#define GPIO_CNTL		0x4C /* LPC GPIO Control Register */
+#define GPIO_ROUT		0xb8
+
+#define PIRQA_ROUT		0x60
+#define PIRQB_ROUT		0x61
+#define PIRQC_ROUT		0x62
+#define PIRQD_ROUT		0x63
+#define PIRQE_ROUT		0x68
+#define PIRQF_ROUT		0x69
+#define PIRQG_ROUT		0x6A
+#define PIRQH_ROUT		0x6B
 
 #define GEN_PMCON_1		0xa0
 #define GEN_PMCON_2		0xa2