peci.h

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/*
 * Copyright (c) 2020 Intel Corporation.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

 
#ifndef ZEPHYR_INCLUDE_DRIVERS_PECI_H_
#define ZEPHYR_INCLUDE_DRIVERS_PECI_H_

 
#include <errno.h>
#include <zephyr/types.h>
#include <stddef.h>
#include <zephyr/device.h>
 
#ifdef __cplusplus
extern "C" {
#endif

enum peci_error_code {
        PECI_GENERAL_SENSOR_ERROR    = 0x8000,
        PECI_UNDERFLOW_SENSOR_ERROR  = 0x8002,
        PECI_OVERFLOW_SENSOR_ERROR   = 0x8003,
};

enum peci_command_code {
        PECI_CMD_PING                = 0x00,
        PECI_CMD_GET_TEMP0           = 0x01,
        PECI_CMD_GET_TEMP1           = 0x02,
        PECI_CMD_RD_PCI_CFG0         = 0x61,
        PECI_CMD_RD_PCI_CFG1         = 0x62,
        PECI_CMD_WR_PCI_CFG0         = 0x65,
        PECI_CMD_WR_PCI_CFG1         = 0x66,
        PECI_CMD_RD_PKG_CFG0         = 0xA1,
        PECI_CMD_RD_PKG_CFG1         = 0xA,
        PECI_CMD_WR_PKG_CFG0         = 0xA5,
        PECI_CMD_WR_PKG_CFG1         = 0xA6,
        PECI_CMD_RD_IAMSR0           = 0xB1,
        PECI_CMD_RD_IAMSR1           = 0xB2,
        PECI_CMD_WR_IAMSR0           = 0xB5,
        PECI_CMD_WR_IAMSR1           = 0xB6,
        PECI_CMD_RD_PCI_CFG_LOCAL0   = 0xE1,
        PECI_CMD_RD_PCI_CFG_LOCAL1   = 0xE2,
        PECI_CMD_WR_PCI_CFG_LOCAL0   = 0xE5,
        PECI_CMD_WR_PCI_CFG_LOCAL1   = 0xE6,
        PECI_CMD_GET_DIB             = 0xF7,
};

#define PECI_CC_RSP_SUCCESS              (0x40U)
#define PECI_CC_RSP_TIMEOUT              (0x80U)
#define PECI_CC_OUT_OF_RESOURCES_TIMEOUT (0x81U)
#define PECI_CC_RESOURCES_LOWPWR_TIMEOUT (0x82U)
#define PECI_CC_ILLEGAL_REQUEST          (0x90U)

#define PECI_PING_WR_LEN               (0U)
#define PECI_PING_RD_LEN               (0U)
#define PECI_PING_LEN                  (3U)

#define PECI_GET_DIB_WR_LEN            (1U)
#define PECI_GET_DIB_RD_LEN            (8U)
#define PECI_GET_DIB_CMD_LEN           (4U)
#define PECI_GET_DIB_DEVINFO           (0U)
#define PECI_GET_DIB_REVNUM            (1U)
#define PECI_GET_DIB_DOMAIN_BIT_MASK   (0x4U)
#define PECI_GET_DIB_MAJOR_REV_MASK    0xF0
#define PECI_GET_DIB_MINOR_REV_MASK    0x0F

#define PECI_GET_TEMP_WR_LEN           (1U)
#define PECI_GET_TEMP_RD_LEN           (2U)
#define PECI_GET_TEMP_CMD_LEN          (4U)
#define PECI_GET_TEMP_LSB              (0U)
#define PECI_GET_TEMP_MSB              (1U)
#define PECI_GET_TEMP_ERR_MSB          (0x80U)
#define PECI_GET_TEMP_ERR_LSB_GENERAL  (0x0U)
#define PECI_GET_TEMP_ERR_LSB_RES      (0x1U)
#define PECI_GET_TEMP_ERR_LSB_TEMP_LO  (0x2U)
#define PECI_GET_TEMP_ERR_LSB_TEMP_HI  (0x3U)

#define PECI_RD_PKG_WR_LEN             (5U)
#define PECI_RD_PKG_LEN_BYTE           (2U)
#define PECI_RD_PKG_LEN_WORD           (3U)
#define PECI_RD_PKG_LEN_DWORD          (5U)
#define PECI_RD_PKG_CMD_LEN            (8U)

#define PECI_WR_PKG_RD_LEN              (1U)
#define PECI_WR_PKG_LEN_BYTE            (7U)
#define PECI_WR_PKG_LEN_WORD            (8U)
#define PECI_WR_PKG_LEN_DWORD           (10U)
#define PECI_WR_PKG_CMD_LEN             (9U)

#define PECI_RD_IAMSR_WR_LEN            (5U)
#define PECI_RD_IAMSR_LEN_BYTE          (2U)
#define PECI_RD_IAMSR_LEN_WORD          (3U)
#define PECI_RD_IAMSR_LEN_DWORD         (5U)
#define PECI_RD_IAMSR_LEN_QWORD         (9U)
#define PECI_RD_IAMSR_CMD_LEN           (8U)

#define PECI_WR_IAMSR_RD_LEN            (1U)
#define PECI_WR_IAMSR_LEN_BYTE          (7U)
#define PECI_WR_IAMSR_LEN_WORD          (8U)
#define PECI_WR_IAMSR_LEN_DWORD         (10U)
#define PECI_WR_IAMSR_LEN_QWORD         (14U)
#define PECI_WR_IAMSR_CMD_LEN           (9U)

#define PECI_RD_PCICFG_WR_LEN           (6U)
#define PECI_RD_PCICFG_LEN_BYTE         (2U)
#define PECI_RD_PCICFG_LEN_WORD         (3U)
#define PECI_RD_PCICFG_LEN_DWORD        (5U)
#define PECI_RD_PCICFG_CMD_LEN          (9U)

#define PECI_WR_PCICFG_RD_LEN           (1U)
#define PECI_WR_PCICFG_LEN_BYTE         (8U)
#define PECI_WR_PCICFG_LEN_WORD         (9U)
#define PECI_WR_PCICFG_LEN_DWORD        (11U)
#define PECI_WR_PCICFG_CMD_LEN          (10U)

#define PECI_RD_PCICFGL_WR_LEN          (5U)
#define PECI_RD_PCICFGL_RD_LEN_BYTE     (2U)
#define PECI_RD_PCICFGL_RD_LEN_WORD     (3U)
#define PECI_RD_PCICFGL_RD_LEN_DWORD    (5U)
#define PECI_RD_PCICFGL_CMD_LEN         (8U)

#define PECI_WR_PCICFGL_RD_LEN          (1U)
#define PECI_WR_PCICFGL_WR_LEN_BYTE     (7U)
#define PECI_WR_PCICFGL_WR_LEN_WORD     (8U)
#define PECI_WR_PCICFGL_WR_LEN_DWORD    (10U)
#define PECI_WR_PCICFGL_CMD_LEN         (9U)

struct peci_buf {
        uint8_t *buf;
        size_t len;
};

struct peci_msg {
        uint8_t addr;
        enum peci_command_code cmd_code;
        struct peci_buf tx_buffer;
        struct peci_buf rx_buffer;
        uint8_t flags;
};

typedef int (*peci_config_t)(const struct device *dev, uint32_t bitrate);
typedef int (*peci_transfer_t)(const struct device *dev, struct peci_msg *msg);
typedef int (*peci_disable_t)(const struct device *dev);
typedef int (*peci_enable_t)(const struct device *dev);
 
__subsystem struct peci_driver_api {
        peci_config_t config;
        peci_disable_t disable;
        peci_enable_t enable;
        peci_transfer_t transfer;
};


__syscall int peci_config(const struct device *dev, uint32_t bitrate);
 
static inline int z_impl_peci_config(const struct device *dev,
                                     uint32_t bitrate)
{
        struct peci_driver_api *api;
 
        api = (struct peci_driver_api *)dev->api;
        return api->config(dev, bitrate);
}

__syscall int peci_enable(const struct device *dev);
 
static inline int z_impl_peci_enable(const struct device *dev)
{
        struct peci_driver_api *api;
 
        api = (struct peci_driver_api *)dev->api;
        return api->enable(dev);
}

__syscall int peci_disable(const struct device *dev);
 
static inline int z_impl_peci_disable(const struct device *dev)
{
        struct peci_driver_api *api;
 
        api = (struct peci_driver_api *)dev->api;
        return api->disable(dev);
}

 
__syscall int peci_transfer(const struct device *dev, struct peci_msg *msg);
 
static inline int z_impl_peci_transfer(const struct device *dev,
                                       struct peci_msg *msg)
{
        struct peci_driver_api *api;
 
        api = (struct peci_driver_api *)dev->api;
        return api->transfer(dev, msg);
}
 
 
#ifdef __cplusplus
}
#endif

 
#include <zephyr/syscalls/peci.h>
 
#endif /* ZEPHYR_INCLUDE_DRIVERS_PECI_H_ */