x86: Move common LPC code to its own place

Some of the LPC code is common to several Intel LPC devices. Move it into a
common location.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

2 files changed, 59 insertions, 2 deletions

diff --git a/arch/x86/include/asm/arch-ivybridge/pch.h b/arch/x86/include/asm/arch-ivybridge/pch.h
index 628b517ba1..f96dc2bb97 100644
--- a/arch/x86/include/asm/arch-ivybridge/pch.h
+++ b/arch/x86/include/asm/arch-ivybridge/pch.h
@@ -211,8 +211,6 @@
 
 #define SMBUS_TIMEOUT		(10 * 1000 * 100)
 
-#define PCH_RCBA_BASE		0xf0
-
 #define VCH		0x0000	/* 32bit */
 #define VCAP1		0x0004	/* 32bit */
 #define VCAP2		0x0008	/* 32bit */
diff --git a/arch/x86/include/asm/lpc_common.h b/arch/x86/include/asm/lpc_common.h
new file mode 100644
index 0000000000..a90a22db3d
--- /dev/null
+++ b/arch/x86/include/asm/lpc_common.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2016 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#ifndef __ASM_LPC_COMMON_H
+#define __ASM_LPC_COMMON_H
+
+#define PCH_RCBA_BASE		0xf0
+
+#define RC		0x3400	/* 32bit */
+#define GCS		0x3410	/* 32bit */
+
+#define PMBASE			0x40
+#define ACPI_CNTL		0x44
+
+#define LPC_IO_DEC		0x80 /* IO Decode Ranges Register */
+#define  COMB_DEC_RANGE		(1 << 4)  /* 0x2f8-0x2ff (COM2) */
+#define  COMA_DEC_RANGE		(0 << 0)  /* 0x3f8-0x3ff (COM1) */
+#define LPC_EN			0x82 /* LPC IF Enables Register */
+#define  CNF2_LPC_EN		(1 << 13) /* 0x4e/0x4f */
+#define  CNF1_LPC_EN		(1 << 12) /* 0x2e/0x2f */
+#define  MC_LPC_EN		(1 << 11) /* 0x62/0x66 */
+#define  KBC_LPC_EN		(1 << 10) /* 0x60/0x64 */
+#define  GAMEH_LPC_EN		(1 << 9)  /* 0x208/0x20f */
+#define  GAMEL_LPC_EN		(1 << 8)  /* 0x200/0x207 */
+#define  FDD_LPC_EN		(1 << 3)  /* LPC_IO_DEC[12] */
+#define  LPT_LPC_EN		(1 << 2)  /* LPC_IO_DEC[9:8] */
+#define  COMB_LPC_EN		(1 << 1)  /* LPC_IO_DEC[6:4] */
+#define  COMA_LPC_EN		(1 << 0)  /* LPC_IO_DEC[3:2] */
+#define LPC_GEN1_DEC		0x84 /* LPC IF Generic Decode Range 1 */
+#define LPC_GEN2_DEC		0x88 /* LPC IF Generic Decode Range 2 */
+#define LPC_GEN3_DEC		0x8c /* LPC IF Generic Decode Range 3 */
+#define LPC_GEN4_DEC		0x90 /* LPC IF Generic Decode Range 4 */
+#define LPC_GENX_DEC(x)		(0x84 + 4 * (x))
+#define  GEN_DEC_RANGE_256B	0xfc0000  /* 256 Bytes */
+#define  GEN_DEC_RANGE_128B	0x7c0000  /* 128 Bytes */
+#define  GEN_DEC_RANGE_64B	0x3c0000  /* 64 Bytes */
+#define  GEN_DEC_RANGE_32B	0x1c0000  /* 32 Bytes */
+#define  GEN_DEC_RANGE_16B	0x0c0000  /* 16 Bytes */
+#define  GEN_DEC_RANGE_8B	0x040000  /* 8 Bytes */
+#define  GEN_DEC_RANGE_4B	0x000000  /* 4 Bytes */
+#define  GEN_DEC_RANGE_EN	(1 << 0)  /* Range Enable */
+
+/**
+ * lpc_common_early_init() - Set up common LPC init
+ *
+ * This sets up the legacy decode areas, GEN_DEC, SPI prefetch and Port80. It
+ * also puts the RCB in the correct place so that RCB_REG() works.
+ *
+ * @dev:	LPC device (a child of the PCH)
+ * @return 0 on success, -ve on error
+ */
+int lpc_common_early_init(struct udevice *dev);
+
+int lpc_set_spi_protect(struct udevice *dev, int bios_ctrl, bool protect);
+
+#endif