linux/drivers/mfd/intel-m10-bmc-core.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Intel MAX 10 Board Management Controller chip - common code
 *
 * Copyright (C) 2018-2020 Intel Corporation. All rights reserved.
 */

#include <linux/bitfield.h>
#include <linux/device.h>
#include <linux/dev_printk.h>
#include <linux/mfd/core.h>
#include <linux/mfd/intel-m10-bmc.h>
#include <linux/module.h>

void m10bmc_fw_state_set(struct intel_m10bmc *m10bmc, enum m10bmc_fw_state new_state)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

/*
 * For some Intel FPGA devices, the BMC firmware is not available to service
 * handshake registers during a secure update.
 */
static bool m10bmc_reg_always_available(struct intel_m10bmc *m10bmc, unsigned int offset)
{ … }

/*
 * m10bmc_handshake_reg_unavailable - Checks if reg access collides with secure update state
 * @m10bmc: M10 BMC structure
 *
 * For some Intel FPGA devices, the BMC firmware is not available to service
 * handshake registers during a secure update erase and write phases.
 *
 * Context: @m10bmc->bmcfw_lock must be held.
 */
static bool m10bmc_handshake_reg_unavailable(struct intel_m10bmc *m10bmc)
{ … }

/*
 * This function helps to simplify the accessing of the system registers.
 *
 * The base of the system registers is configured through the struct
 * csr_map.
 */
int m10bmc_sys_read(struct intel_m10bmc *m10bmc, unsigned int offset, unsigned int *val)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

int m10bmc_sys_update_bits(struct intel_m10bmc *m10bmc, unsigned int offset,
			   unsigned int msk, unsigned int val)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

static ssize_t bmc_version_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{ … }
static DEVICE_ATTR_RO(bmc_version);

static ssize_t bmcfw_version_show(struct device *dev,
				  struct device_attribute *attr, char *buf)
{ … }
static DEVICE_ATTR_RO(bmcfw_version);

static ssize_t mac_address_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{ … }
static DEVICE_ATTR_RO(mac_address);

static ssize_t mac_count_show(struct device *dev,
			      struct device_attribute *attr, char *buf)
{ … }
static DEVICE_ATTR_RO(mac_count);

static struct attribute *m10bmc_attrs[] = …;

static const struct attribute_group m10bmc_group = …;

const struct attribute_group *m10bmc_dev_groups[] = …;
EXPORT_SYMBOL_NS_GPL(…);

int m10bmc_dev_init(struct intel_m10bmc *m10bmc, const struct intel_m10bmc_platform_info *info)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;
MODULE_LICENSE(…) …;