/*
 * From Coreboot src/southbridge/intel/bd82x6x/me.h
 *
 * Coreboot copies lots of code around. Here we are trying to keep the common
 * code in a separate file to reduce code duplication and hopefully make it
 * easier to add new platform.
 *
 * Copyright (C) 2016 Google, Inc
 *
 * SPDX-License-Identifier:     GPL-2.0
 */

#ifndef __ASM_ME_COMMON_H
#define __ASM_ME_COMMON_H

#include <linux/compiler.h>
#include <linux/types.h>
#include <pci.h>

#define MCHBAR_PEI_VERSION      0x5034

#define ME_RETRY                100000  /* 1 second */
#define ME_DELAY                10      /* 10 us */

/*
 * Management Engine PCI registers
 */

#define PCI_CPU_MEBASE_L        0x70    /* Set by MRC */
#define PCI_CPU_MEBASE_H        0x74    /* Set by MRC */

#define PCI_ME_HFS              0x40
#define  ME_HFS_CWS_RESET       0
#define  ME_HFS_CWS_INIT        1
#define  ME_HFS_CWS_REC         2
#define  ME_HFS_CWS_NORMAL      5
#define  ME_HFS_CWS_WAIT        6
#define  ME_HFS_CWS_TRANS       7
#define  ME_HFS_CWS_INVALID     8
#define  ME_HFS_STATE_PREBOOT   0
#define  ME_HFS_STATE_M0_UMA    1
#define  ME_HFS_STATE_M3        4
#define  ME_HFS_STATE_M0        5
#define  ME_HFS_STATE_BRINGUP   6
#define  ME_HFS_STATE_ERROR     7
#define  ME_HFS_ERROR_NONE      0
#define  ME_HFS_ERROR_UNCAT     1
#define  ME_HFS_ERROR_IMAGE     3
#define  ME_HFS_ERROR_DEBUG     4
#define  ME_HFS_MODE_NORMAL     0
#define  ME_HFS_MODE_DEBUG      2
#define  ME_HFS_MODE_DIS        3
#define  ME_HFS_MODE_OVER_JMPR  4
#define  ME_HFS_MODE_OVER_MEI   5
#define  ME_HFS_BIOS_DRAM_ACK   1
#define  ME_HFS_ACK_NO_DID      0
#define  ME_HFS_ACK_RESET       1
#define  ME_HFS_ACK_PWR_CYCLE   2
#define  ME_HFS_ACK_S3          3
#define  ME_HFS_ACK_S4          4
#define  ME_HFS_ACK_S5          5
#define  ME_HFS_ACK_GBL_RESET   6
#define  ME_HFS_ACK_CONTINUE    7

struct me_hfs {
        u32 working_state:4;
        u32 mfg_mode:1;
        u32 fpt_bad:1;
        u32 operation_state:3;
        u32 fw_init_complete:1;
        u32 ft_bup_ld_flr:1;
        u32 update_in_progress:1;
        u32 error_code:4;
        u32 operation_mode:4;
        u32 reserved:4;
        u32 boot_options_present:1;
        u32 ack_data:3;
        u32 bios_msg_ack:4;
} __packed;

#define PCI_ME_UMA              0x44

struct me_uma {
        u32 size:6;
        u32 reserved_1:10;
        u32 valid:1;
        u32 reserved_0:14;
        u32 set_to_one:1;
} __packed;

#define PCI_ME_H_GS             0x4c
#define  ME_INIT_DONE           1
#define  ME_INIT_STATUS_SUCCESS 0
#define  ME_INIT_STATUS_NOMEM   1
#define  ME_INIT_STATUS_ERROR   2

struct me_did {
        u32 uma_base:16;
        u32 reserved:7;
        u32 rapid_start:1;      /* Broadwell only */
        u32 status:4;
        u32 init_done:4;
} __packed;

#define PCI_ME_GMES             0x48
#define  ME_GMES_PHASE_ROM      0
#define  ME_GMES_PHASE_BUP      1
#define  ME_GMES_PHASE_UKERNEL  2
#define  ME_GMES_PHASE_POLICY   3
#define  ME_GMES_PHASE_MODULE   4
#define  ME_GMES_PHASE_UNKNOWN  5
#define  ME_GMES_PHASE_HOST     6

struct me_gmes {
        u32 bist_in_prog:1;
        u32 icc_prog_sts:2;
        u32 invoke_mebx:1;
        u32 cpu_replaced_sts:1;
        u32 mbp_rdy:1;
        u32 mfs_failure:1;
        u32 warm_rst_req_for_df:1;
        u32 cpu_replaced_valid:1;
        u32 reserved_1:2;
        u32 fw_upd_ipu:1;
        u32 reserved_2:4;
        u32 current_state:8;
        u32 current_pmevent:4;
        u32 progress_code:4;
} __packed;

#define PCI_ME_HERES            0xbc
#define  PCI_ME_EXT_SHA1        0x00
#define  PCI_ME_EXT_SHA256      0x02
#define PCI_ME_HER(x)           (0xc0+(4*(x)))

struct me_heres {
        u32 extend_reg_algorithm:4;
        u32 reserved:26;
        u32 extend_feature_present:1;
        u32 extend_reg_valid:1;
} __packed;

/*
 * Management Engine MEI registers
 */

#define MEI_H_CB_WW             0x00
#define MEI_H_CSR               0x04
#define MEI_ME_CB_RW            0x08
#define MEI_ME_CSR_HA           0x0c

struct mei_csr {
        u32 interrupt_enable:1;
        u32 interrupt_status:1;
        u32 interrupt_generate:1;
        u32 ready:1;
        u32 reset:1;
        u32 reserved:3;
        u32 buffer_read_ptr:8;
        u32 buffer_write_ptr:8;
        u32 buffer_depth:8;
} __packed;

#define MEI_ADDRESS_CORE        0x01
#define MEI_ADDRESS_AMT         0x02
#define MEI_ADDRESS_RESERVED    0x03
#define MEI_ADDRESS_WDT         0x04
#define MEI_ADDRESS_MKHI        0x07
#define MEI_ADDRESS_ICC         0x08
#define MEI_ADDRESS_THERMAL     0x09

#define MEI_HOST_ADDRESS        0

struct mei_header {
        u32 client_address:8;
        u32 host_address:8;
        u32 length:9;
        u32 reserved:6;
        u32 is_complete:1;
} __packed;

#define MKHI_GROUP_ID_CBM       0x00
#define MKHI_GROUP_ID_FWCAPS    0x03
#define MKHI_GROUP_ID_MDES      0x08
#define MKHI_GROUP_ID_GEN       0xff

#define MKHI_GET_FW_VERSION     0x02
#define MKHI_END_OF_POST        0x0c
#define MKHI_FEATURE_OVERRIDE   0x14

/* Ivybridge only: */
#define MKHI_GLOBAL_RESET       0x0b
#define MKHI_FWCAPS_GET_RULE    0x02
#define MKHI_MDES_ENABLE        0x09

/* Broadwell only: */
#define MKHI_GLOBAL_RESET       0x0b
#define MKHI_FWCAPS_GET_RULE    0x02
#define MKHI_GROUP_ID_HMRFPO    0x05
#define MKHI_HMRFPO_LOCK        0x02
#define MKHI_HMRFPO_LOCK_NOACK  0x05
#define MKHI_MDES_ENABLE        0x09
#define MKHI_END_OF_POST_NOACK  0x1a

struct mkhi_header {
        u32 group_id:8;
        u32 command:7;
        u32 is_response:1;
        u32 reserved:8;
        u32 result:8;
} __packed;

struct me_fw_version {
        u16 code_minor;
        u16 code_major;
        u16 code_build_number;
        u16 code_hot_fix;
        u16 recovery_minor;
        u16 recovery_major;
        u16 recovery_build_number;
        u16 recovery_hot_fix;
} __packed;


#define HECI_EOP_STATUS_SUCCESS       0x0
#define HECI_EOP_PERFORM_GLOBAL_RESET 0x1

#define CBM_RR_GLOBAL_RESET     0x01

#define GLOBAL_RESET_BIOS_MRC   0x01
#define GLOBAL_RESET_BIOS_POST  0x02
#define GLOBAL_RESET_MEBX       0x03

struct me_global_reset {
        u8 request_origin;
        u8 reset_type;
} __packed;

enum me_bios_path {
        ME_NORMAL_BIOS_PATH,
        ME_S3WAKE_BIOS_PATH,
        ME_ERROR_BIOS_PATH,
        ME_RECOVERY_BIOS_PATH,
        ME_DISABLE_BIOS_PATH,
        ME_FIRMWARE_UPDATE_BIOS_PATH,
};

struct __packed mefwcaps_sku {
        u32 full_net:1;
        u32 std_net:1;
        u32 manageability:1;
        u32 small_business:1;
        u32 l3manageability:1;
        u32 intel_at:1;
        u32 intel_cls:1;
        u32 reserved:3;
        u32 intel_mpc:1;
        u32 icc_over_clocking:1;
        u32 pavp:1;
        u32 reserved_1:4;
        u32 ipv6:1;
        u32 kvm:1;
        u32 och:1;
        u32 vlan:1;
        u32 tls:1;
        u32 reserved_4:1;
        u32 wlan:1;
        u32 reserved_5:8;
};

struct __packed tdt_state_flag {
        u16 lock_state:1;
        u16 authenticate_module:1;
        u16 s3authentication:1;
        u16 flash_wear_out:1;
        u16 flash_variable_security:1;
        u16 wwan3gpresent:1;    /* ivybridge only */
        u16 wwan3goob:1;        /* ivybridge only */
        u16 reserved:9;
};

struct __packed tdt_state_info {
        u8 state;
        u8 last_theft_trigger;
        struct tdt_state_flag flags;
};

struct __packed mbp_rom_bist_data {
        u16 device_id;
        u16 fuse_test_flags;
        u32 umchid[4];
};

struct __packed mbp_platform_key {
        u32 key[8];
};

struct __packed mbp_header {
        u32 mbp_size:8;
        u32 num_entries:8;
        u32 rsvd:16;
};

struct __packed mbp_item_header {
        u32 app_id:8;
        u32 item_id:8;
        u32 length:8;
        u32 rsvd:8;
};

struct __packed me_fwcaps {
        u32 id;
        u8 length;
        struct mefwcaps_sku caps_sku;
        u8 reserved[3];
};

/**
 * intel_me_status() - Check Intel Management Engine status
 *
 * @me_dev:     Management engine PCI device
 */
void intel_me_status(struct udevice *me_dev);

/**
 * intel_early_me_init() - Early Intel Management Engine init
 *
 * @me_dev:     Management engine PCI device
 * @return 0 if OK, -ve on error
 */
int intel_early_me_init(struct udevice *me_dev);

/**
 * intel_early_me_uma_size() - Get UMA size from the Intel Management Engine
 *
 * @me_dev:     Management engine PCI device
 * @return UMA size if OK, -EINVAL on error
 */
int intel_early_me_uma_size(struct udevice *me_dev);

/**
 * intel_early_me_init_done() - Complete Intel Management Engine init
 *
 * @dev:        Northbridge device
 * @me_dev:     Management engine PCI device
 * @status:     Status result (ME_INIT_...)
 * @return 0 to continue to boot, -EINVAL on unknown result data, -ETIMEDOUT
 * if ME did not respond
 */
int intel_early_me_init_done(struct udevice *dev, struct udevice *me_dev,
                             uint status);

int intel_me_hsio_version(struct udevice *dev, uint16_t *version,
                          uint16_t *checksum);

static inline void pci_read_dword_ptr(struct udevice *me_dev, void *ptr,
                                      int offset)
{
        u32 dword;

        dm_pci_read_config32(me_dev, offset, &dword);
        memcpy(ptr, &dword, sizeof(dword));
}

static inline void pci_write_dword_ptr(struct udevice *me_dev, void *ptr,
                                       int offset)
{
        u32 dword = 0;

        memcpy(&dword, ptr, sizeof(dword));
        dm_pci_write_config32(me_dev, offset, dword);
}
#endif