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1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (c) 2016 Google, Inc
4  */
5 
6 #ifndef __ASM_LPC_COMMON_H
7 #define __ASM_LPC_COMMON_H
8 
9 #define PCH_RCBA_BASE		0xf0
10 
11 #define RC		0x3400	/* 32bit */
12 #define GCS		0x3410	/* 32bit */
13 
14 #define PMBASE			0x40
15 #define ACPI_CNTL		0x44
16 
17 #define LPC_IO_DEC		0x80 /* IO Decode Ranges Register */
18 #define  COMB_DEC_RANGE		(1 << 4)  /* 0x2f8-0x2ff (COM2) */
19 #define  COMA_DEC_RANGE		(0 << 0)  /* 0x3f8-0x3ff (COM1) */
20 #define LPC_EN			0x82 /* LPC IF Enables Register */
21 #define  CNF2_LPC_EN		(1 << 13) /* 0x4e/0x4f */
22 #define  CNF1_LPC_EN		(1 << 12) /* 0x2e/0x2f */
23 #define  MC_LPC_EN		(1 << 11) /* 0x62/0x66 */
24 #define  KBC_LPC_EN		(1 << 10) /* 0x60/0x64 */
25 #define  GAMEH_LPC_EN		(1 << 9)  /* 0x208/0x20f */
26 #define  GAMEL_LPC_EN		(1 << 8)  /* 0x200/0x207 */
27 #define  FDD_LPC_EN		(1 << 3)  /* LPC_IO_DEC[12] */
28 #define  LPT_LPC_EN		(1 << 2)  /* LPC_IO_DEC[9:8] */
29 #define  COMB_LPC_EN		(1 << 1)  /* LPC_IO_DEC[6:4] */
30 #define  COMA_LPC_EN		(1 << 0)  /* LPC_IO_DEC[3:2] */
31 #define LPC_GEN1_DEC		0x84 /* LPC IF Generic Decode Range 1 */
32 #define LPC_GEN2_DEC		0x88 /* LPC IF Generic Decode Range 2 */
33 #define LPC_GEN3_DEC		0x8c /* LPC IF Generic Decode Range 3 */
34 #define LPC_GEN4_DEC		0x90 /* LPC IF Generic Decode Range 4 */
35 #define LPC_GENX_DEC(x)		(0x84 + 4 * (x))
36 #define  GEN_DEC_RANGE_256B	0xfc0000  /* 256 Bytes */
37 #define  GEN_DEC_RANGE_128B	0x7c0000  /* 128 Bytes */
38 #define  GEN_DEC_RANGE_64B	0x3c0000  /* 64 Bytes */
39 #define  GEN_DEC_RANGE_32B	0x1c0000  /* 32 Bytes */
40 #define  GEN_DEC_RANGE_16B	0x0c0000  /* 16 Bytes */
41 #define  GEN_DEC_RANGE_8B	0x040000  /* 8 Bytes */
42 #define  GEN_DEC_RANGE_4B	0x000000  /* 4 Bytes */
43 #define  GEN_DEC_RANGE_EN	(1 << 0)  /* Range Enable */
44 
45 /**
46  * lpc_common_early_init() - Set up common LPC init
47  *
48  * This sets up the legacy decode areas, GEN_DEC, SPI prefetch and Port80. It
49  * also puts the RCB in the correct place so that RCB_REG() works.
50  *
51  * @dev:	LPC device (a child of the PCH)
52  * @return 0 on success, -ve on error
53  */
54 int lpc_common_early_init(struct udevice *dev);
55 
56 int lpc_set_spi_protect(struct udevice *dev, int bios_ctrl, bool protect);
57 
58 #endif
59