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- /* SPDX-License-Identifier: BSD-3-Clause */
- /******************************************************************************
- *
- * Copyright (C) 2017-2018 Cadence Design Systems, Inc.
- * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
- *
- * cps_drv_lpddr4.h
- * Interface for the Register Accaess Layer of Cadence Platform Service (CPS)
- *****************************************************************************
- */
- #ifndef CPS_DRV_H_
- #define CPS_DRV_H_
- #include <stddef.h>
- #include <inttypes.h>
- #include <asm/io.h>
- /**
- * \brief Read a 32-bit value from memory.
- * \param reg address of the memory mapped hardware register
- * \return the value at the given address
- */
- #define CPS_REG_READ(reg) (readl((volatile uint32_t*)(reg)))
- /**
- * \brief Write a 32-bit address value to memory.
- * \param reg address of the memory mapped hardware register
- * \param value unsigned 32-bit value to write
- */
- #define CPS_REG_WRITE(reg, value) (writel((uint32_t)(value), (volatile uint32_t*)(reg)))
- /**
- * \brief Subtitue the value of fld macro and concatinate with required string
- * \param fld field name
- */
- #define CPS_FLD_MASK(fld) (fld ## _MASK)
- #define CPS_FLD_SHIFT(fld) (fld ## _SHIFT)
- #define CPS_FLD_WIDTH(fld) (fld ## _WIDTH)
- #define CPS_FLD_WOCLR(fld) (fld ## _WOCLR)
- #define CPS_FLD_WOSET(fld) (fld ## _WOSET)
- /**
- * \brief Read a value of bit-field from the register value.
- * \param reg register name
- * \param fld field name
- * \param reg_value register value
- * \return bit-field value
- */
- #define CPS_FLD_READ(fld, reg_value) (cps_fldread((uint32_t)(CPS_FLD_MASK(fld)), \
- (uint32_t)(CPS_FLD_SHIFT(fld)), \
- (uint32_t)(reg_value)))
- /**
- * \brief Write a value of the bit-field into the register value.
- * \param reg register name
- * \param fld field name
- * \param reg_value register value
- * \param value value to be written to bit-field
- * \return modified register value
- */
- #define CPS_FLD_WRITE(fld, reg_value, value) (cps_fldwrite((uint32_t)(CPS_FLD_MASK(fld)), \
- (uint32_t)(CPS_FLD_SHIFT(fld)), \
- (uint32_t)(reg_value), (uint32_t)(value)))
- /**
- * \brief Set bit within the register value.
- * \param reg register name
- * \param fld field name
- * \param reg_value register value
- * \return modified register value
- */
- #define CPS_FLD_SET(fld, reg_value) (cps_fldset((uint32_t)(CPS_FLD_WIDTH(fld)), \
- (uint32_t)(CPS_FLD_MASK(fld)), \
- (uint32_t)(CPS_FLD_WOCLR(fld)), \
- (uint32_t)(reg_value)))
- static inline uint32_t cps_fldread(uint32_t mask, uint32_t shift, uint32_t reg_value)
- {
- uint32_t result = (reg_value & mask) >> shift;
- return (result);
- }
- /**
- * \brief Write a value of the bit-field into the register value.
- * \param mask mask for the bit-field
- * \param shift bit-field shift from LSB
- * \param reg_value register value
- * \param value value to be written to bit-field
- * \return modified register value
- */
- static inline uint32_t cps_fldwrite(uint32_t mask, uint32_t shift, uint32_t reg_value, uint32_t value)
- {
- uint32_t new_value = (value << shift) & mask;
- new_value = (reg_value & ~mask) | new_value;
- return (new_value);
- }
- /**
- * \brief Set bit within the register value.
- * \param width width of the bit-field
- * \param mask mask for the bit-field
- * \param is_woclr is bit-field has 'write one to clear' flag set
- * \param reg_value register value
- * \return modified register value
- */
- static inline uint32_t cps_fldset(uint32_t width, uint32_t mask, uint32_t is_woclr, uint32_t reg_value)
- {
- uint32_t new_value = reg_value;
- /* Confirm the field to be bit and not write to clear type */
- if ((width == 1U) && (is_woclr == 0U)) {
- new_value |= mask;
- }
- return (new_value);
- }
- #endif /* CPS_DRV_H_ */
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