ram: k3-j721e: Rename to k3-ddrss

Rename the k3-j721e folder under drivers/ram to k3-ddrss in preparation
of introducing additional support for other platforms to the same
driver.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>

1 files changed, 119 insertions, 0 deletions

diff --git a/drivers/ram/k3-ddrss/cps_drv_lpddr4.h b/drivers/ram/k3-ddrss/cps_drv_lpddr4.h
new file mode 100644
index 0000000000..706a5cde01
--- /dev/null
+++ b/drivers/ram/k3-ddrss/cps_drv_lpddr4.h
@@ -0,0 +1,119 @@
+/* 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_ */