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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Intel MAX 10 Board Management Controller chip.
*
* Copyright (C) 2018-2020 Intel Corporation, Inc.
*/
#ifndef __MFD_INTEL_M10_BMC_H
#define __MFD_INTEL_M10_BMC_H
#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/dev_printk.h>
#include <linux/regmap.h>
#define M10BMC_N3000_LEGACY_BUILD_VER 0x300468
#define M10BMC_N3000_SYS_BASE 0x300800
#define M10BMC_N3000_SYS_END 0x300fff
#define M10BMC_N3000_FLASH_BASE 0x10000000
#define M10BMC_N3000_FLASH_END 0x1fffffff
#define M10BMC_N3000_MEM_END M10BMC_N3000_FLASH_END
#define M10BMC_STAGING_BASE 0x18000000
#define M10BMC_STAGING_SIZE 0x3800000
/* Register offset of system registers */
#define NIOS2_N3000_FW_VERSION 0x0
#define M10BMC_N3000_MAC_LOW 0x10
#define M10BMC_N3000_MAC_BYTE4 GENMASK(7, 0)
#define M10BMC_N3000_MAC_BYTE3 GENMASK(15, 8)
#define M10BMC_N3000_MAC_BYTE2 GENMASK(23, 16)
#define M10BMC_N3000_MAC_BYTE1 GENMASK(31, 24)
#define M10BMC_N3000_MAC_HIGH 0x14
#define M10BMC_N3000_MAC_BYTE6 GENMASK(7, 0)
#define M10BMC_N3000_MAC_BYTE5 GENMASK(15, 8)
#define M10BMC_N3000_MAC_COUNT GENMASK(23, 16)
#define M10BMC_N3000_TEST_REG 0x3c
#define M10BMC_N3000_BUILD_VER 0x68
#define M10BMC_N3000_VER_MAJOR_MSK GENMASK(23, 16)
#define M10BMC_N3000_VER_PCB_INFO_MSK GENMASK(31, 24)
#define M10BMC_N3000_VER_LEGACY_INVALID 0xffffffff
/* Secure update doorbell register, in system register region */
#define M10BMC_N3000_DOORBELL 0x400
/* Authorization Result register, in system register region */
#define M10BMC_N3000_AUTH_RESULT 0x404
/* Doorbell register fields */
#define DRBL_RSU_REQUEST BIT(0)
#define DRBL_RSU_PROGRESS GENMASK(7, 4)
#define DRBL_HOST_STATUS GENMASK(11, 8)
#define DRBL_RSU_STATUS GENMASK(23, 16)
#define DRBL_PKVL_EEPROM_LOAD_SEC BIT(24)
#define DRBL_PKVL1_POLL_EN BIT(25)
#define DRBL_PKVL2_POLL_EN BIT(26)
#define DRBL_CONFIG_SEL BIT(28)
#define DRBL_REBOOT_REQ BIT(29)
#define DRBL_REBOOT_DISABLED BIT(30)
/* Progress states */
#define RSU_PROG_IDLE 0x0
#define RSU_PROG_PREPARE 0x1
#define RSU_PROG_READY 0x3
#define RSU_PROG_AUTHENTICATING 0x4
#define RSU_PROG_COPYING 0x5
#define RSU_PROG_UPDATE_CANCEL 0x6
#define RSU_PROG_PROGRAM_KEY_HASH 0x7
#define RSU_PROG_RSU_DONE 0x8
#define RSU_PROG_PKVL_PROM_DONE 0x9
/* Device and error states */
#define RSU_STAT_NORMAL 0x0
#define RSU_STAT_TIMEOUT 0x1
#define RSU_STAT_AUTH_FAIL 0x2
#define RSU_STAT_COPY_FAIL 0x3
#define RSU_STAT_FATAL 0x4
#define RSU_STAT_PKVL_REJECT 0x5
#define RSU_STAT_NON_INC 0x6
#define RSU_STAT_ERASE_FAIL 0x7
#define RSU_STAT_WEAROUT 0x8
#define RSU_STAT_NIOS_OK 0x80
#define RSU_STAT_USER_OK 0x81
#define RSU_STAT_FACTORY_OK 0x82
#define RSU_STAT_USER_FAIL 0x83
#define RSU_STAT_FACTORY_FAIL 0x84
#define RSU_STAT_NIOS_FLASH_ERR 0x85
#define RSU_STAT_FPGA_FLASH_ERR 0x86
#define HOST_STATUS_IDLE 0x0
#define HOST_STATUS_WRITE_DONE 0x1
#define HOST_STATUS_ABORT_RSU 0x2
#define rsu_prog(doorbell) FIELD_GET(DRBL_RSU_PROGRESS, doorbell)
/* interval 100ms and timeout 5s */
#define NIOS_HANDSHAKE_INTERVAL_US (100 * 1000)
#define NIOS_HANDSHAKE_TIMEOUT_US (5 * 1000 * 1000)
/* RSU PREP Timeout (2 minutes) to erase flash staging area */
#define RSU_PREP_INTERVAL_MS 100
#define RSU_PREP_TIMEOUT_MS (2 * 60 * 1000)
/* RSU Complete Timeout (40 minutes) for full flash update */
#define RSU_COMPLETE_INTERVAL_MS 1000
#define RSU_COMPLETE_TIMEOUT_MS (40 * 60 * 1000)
/* Addresses for security related data in FLASH */
#define M10BMC_N3000_BMC_REH_ADDR 0x17ffc004
#define M10BMC_N3000_BMC_PROG_ADDR 0x17ffc000
#define M10BMC_N3000_BMC_PROG_MAGIC 0x5746
#define M10BMC_N3000_SR_REH_ADDR 0x17ffd004
#define M10BMC_N3000_SR_PROG_ADDR 0x17ffd000
#define M10BMC_N3000_SR_PROG_MAGIC 0x5253
#define M10BMC_N3000_PR_REH_ADDR 0x17ffe004
#define M10BMC_N3000_PR_PROG_ADDR 0x17ffe000
#define M10BMC_N3000_PR_PROG_MAGIC 0x5250
/* Address of 4KB inverted bit vector containing staging area FLASH count */
#define M10BMC_N3000_STAGING_FLASH_COUNT 0x17ffb000
/**
* struct m10bmc_csr_map - Intel MAX 10 BMC CSR register map
*/
struct m10bmc_csr_map {
unsigned int base;
unsigned int build_version;
unsigned int fw_version;
unsigned int mac_low;
unsigned int mac_high;
unsigned int doorbell;
unsigned int auth_result;
unsigned int bmc_prog_addr;
unsigned int bmc_reh_addr;
unsigned int bmc_magic;
unsigned int sr_prog_addr;
unsigned int sr_reh_addr;
unsigned int sr_magic;
unsigned int pr_prog_addr;
unsigned int pr_reh_addr;
unsigned int pr_magic;
unsigned int rsu_update_counter;
};
/**
* struct intel_m10bmc_platform_info - Intel MAX 10 BMC platform specific information
* @cells: MFD cells
* @n_cells: MFD cells ARRAY_SIZE()
* @csr_map: the mappings for register definition of MAX10 BMC
*/
struct intel_m10bmc_platform_info {
struct mfd_cell *cells;
int n_cells;
const struct m10bmc_csr_map *csr_map;
};
/**
* struct intel_m10bmc - Intel MAX 10 BMC parent driver data structure
* @dev: this device
* @regmap: the regmap used to access registers by m10bmc itself
* @info: the platform information for MAX10 BMC
*/
struct intel_m10bmc {
struct device *dev;
struct regmap *regmap;
const struct intel_m10bmc_platform_info *info;
};
/*
* register access helper functions.
*
* m10bmc_raw_read - read m10bmc register per addr
* m10bmc_sys_read - read m10bmc system register per offset
*/
static inline int
m10bmc_raw_read(struct intel_m10bmc *m10bmc, unsigned int addr,
unsigned int *val)
{
int ret;
ret = regmap_read(m10bmc->regmap, addr, val);
if (ret)
dev_err(m10bmc->dev, "fail to read raw reg %x: %d\n",
addr, ret);
return ret;
}
/*
* The base of the system registers could be configured by HW developers, and
* in HW SPEC, the base is not added to the addresses of the system registers.
*
* This function helps to simplify the accessing of the system registers. And if
* the base is reconfigured in HW, SW developers could simply change the
* csr_map's base accordingly.
*/
static inline int m10bmc_sys_read(struct intel_m10bmc *m10bmc, unsigned int offset,
unsigned int *val)
{
const struct m10bmc_csr_map *csr_map = m10bmc->info->csr_map;
return m10bmc_raw_read(m10bmc, csr_map->base + offset, val);
}
/*
* MAX10 BMC Core support
*/
int m10bmc_dev_init(struct intel_m10bmc *m10bmc, const struct intel_m10bmc_platform_info *info);
extern const struct attribute_group *m10bmc_dev_groups[];
#endif /* __MFD_INTEL_M10_BMC_H */
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