tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Intel MAX 10 Board Management Controller chip.
4 *
5 * Copyright (C) 2018-2020 Intel Corporation, Inc.
6 */
7#ifndef __MFD_INTEL_M10_BMC_H
8#define __MFD_INTEL_M10_BMC_H
9
10#include <linux/regmap.h>
11
12#define M10BMC_LEGACY_SYS_BASE 0x300400
13#define M10BMC_SYS_BASE 0x300800
14#define M10BMC_MEM_END 0x200000fc
15
16/* Register offset of system registers */
17#define NIOS2_FW_VERSION 0x0
18#define M10BMC_TEST_REG 0x3c
19#define M10BMC_BUILD_VER 0x68
20#define M10BMC_VER_MAJOR_MSK GENMASK(23, 16)
21#define M10BMC_VER_PCB_INFO_MSK GENMASK(31, 24)
22#define M10BMC_VER_LEGACY_INVALID 0xffffffff
23
24/**
25 * struct intel_m10bmc - Intel MAX 10 BMC parent driver data structure
26 * @dev: this device
27 * @regmap: the regmap used to access registers by m10bmc itself
28 */
29struct intel_m10bmc {
30 struct device *dev;
31 struct regmap *regmap;
32};
33
34/*
35 * register access helper functions.
36 *
37 * m10bmc_raw_read - read m10bmc register per addr
38 * m10bmc_sys_read - read m10bmc system register per offset
39 */
40static inline int
41m10bmc_raw_read(struct intel_m10bmc *m10bmc, unsigned int addr,
42 unsigned int *val)
43{
44 int ret;
45
46 ret = regmap_read(m10bmc->regmap, addr, val);
47 if (ret)
48 dev_err(m10bmc->dev, "fail to read raw reg %x: %d\n",
49 addr, ret);
50
51 return ret;
52}
53
54/*
55 * The base of the system registers could be configured by HW developers, and
56 * in HW SPEC, the base is not added to the addresses of the system registers.
57 *
58 * This macro helps to simplify the accessing of the system registers. And if
59 * the base is reconfigured in HW, SW developers could simply change the
60 * M10BMC_SYS_BASE accordingly.
61 */
62#define m10bmc_sys_read(m10bmc, offset, val) \
63 m10bmc_raw_read(m10bmc, M10BMC_SYS_BASE + (offset), val)
64
65#endif /* __MFD_INTEL_M10_BMC_H */