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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2025
* Altera Corporation <www.altera.com>
*/
#ifndef __CADENCE_XSPI_H__
#define __CADENCE_XSPI_H__
#include <spi-mem.h>
#include <reset.h>
#include <linux/mtd/spi-nor.h>
#include <linux/bitfield.h>
#include <linux/log2.h>
#define CDNS_XSPI_MAGIC_NUM_VALUE 0x6522
#define CDNS_XSPI_MAX_BANKS 8
#define CDNS_XSPI_NAME "cadence_xspi"
/*
* Note: below are additional auxiliary registers to
* configure XSPI controller pin-strap settings
*/
/* PHY DQ timing register */
#define CDNS_XSPI_CCP_PHY_DQ_TIMING 0x0000
/* PHY DQS timing register */
#define CDNS_XSPI_CCP_PHY_DQS_TIMING 0x0004
/* PHY gate loopback control register */
#define CDNS_XSPI_CCP_PHY_GATE_LPBCK_CTRL 0x0008
/* PHY DLL slave control register */
#define CDNS_XSPI_CCP_PHY_DLL_SLAVE_CTRL 0x0010
/* DLL PHY control register */
#define CDNS_XSPI_DLL_PHY_CTRL 0x1034
/* Command registers */
#define CDNS_XSPI_CMD_REG_0 0x0000
#define CDNS_XSPI_CMD_REG_1 0x0004
#define CDNS_XSPI_CMD_REG_2 0x0008
#define CDNS_XSPI_CMD_REG_3 0x000C
#define CDNS_XSPI_CMD_REG_4 0x0010
#define CDNS_XSPI_CMD_REG_5 0x0014
/* Command status registers */
#define CDNS_XSPI_CMD_STATUS_REG 0x0044
/* Controller status register */
#define CDNS_XSPI_CTRL_STATUS_REG 0x0100
#define CDNS_XSPI_INIT_COMPLETED BIT(16)
#define CDNS_XSPI_INIT_LEGACY BIT(9)
#define CDNS_XSPI_INIT_FAIL BIT(8)
#define CDNS_XSPI_CTRL_BUSY BIT(7)
/* Controller interrupt status register */
#define CDNS_XSPI_INTR_STATUS_REG 0x0110
#define CDNS_XSPI_STIG_DONE BIT(23)
#define CDNS_XSPI_SDMA_ERROR BIT(22)
#define CDNS_XSPI_SDMA_TRIGGER BIT(21)
#define CDNS_XSPI_CMD_IGNRD_EN BIT(20)
#define CDNS_XSPI_DDMA_TERR_EN BIT(18)
#define CDNS_XSPI_CDMA_TREE_EN BIT(17)
#define CDNS_XSPI_CTRL_IDLE_EN BIT(16)
#define CDNS_XSPI_TRD_COMP_INTR_STATUS 0x0120
#define CDNS_XSPI_TRD_ERR_INTR_STATUS 0x0130
#define CDNS_XSPI_TRD_ERR_INTR_EN 0x0134
/* Controller interrupt enable register */
#define CDNS_XSPI_INTR_ENABLE_REG 0x0114
#define CDNS_XSPI_INTR_EN BIT(31)
#define CDNS_XSPI_STIG_DONE_EN BIT(23)
#define CDNS_XSPI_SDMA_ERROR_EN BIT(22)
#define CDNS_XSPI_SDMA_TRIGGER_EN BIT(21)
#define CDNS_XSPI_INTR_MASK (CDNS_XSPI_INTR_EN | \
CDNS_XSPI_STIG_DONE_EN | \
CDNS_XSPI_SDMA_ERROR_EN | \
CDNS_XSPI_SDMA_TRIGGER_EN)
/* Controller config register */
#define CDNS_XSPI_CTRL_CONFIG_REG 0x0230
#define CDNS_XSPI_CTRL_WORK_MODE GENMASK(6, 5)
#define CDNS_XSPI_WORK_MODE_DIRECT 0
#define CDNS_XSPI_WORK_MODE_STIG 1
#define CDNS_XSPI_WORK_MODE_ACMD 3
/* SDMA trigger transaction registers */
#define CDNS_XSPI_SDMA_SIZE_REG 0x0240
#define CDNS_XSPI_SDMA_TRD_INFO_REG 0x0244
#define CDNS_XSPI_SDMA_DIR BIT(8)
/* Controller features register */
#define CDNS_XSPI_CTRL_FEATURES_REG 0x0F04
#define CDNS_XSPI_NUM_BANKS GENMASK(25, 24)
#define CDNS_XSPI_DMA_DATA_WIDTH BIT(21)
#define CDNS_XSPI_NUM_THREADS GENMASK(3, 0)
/* Controller version register */
#define CDNS_XSPI_CTRL_VERSION_REG 0x0F00
#define CDNS_XSPI_MAGIC_NUM GENMASK(31, 16)
#define CDNS_XSPI_CTRL_REV GENMASK(7, 0)
/* STIG Profile 1.0 instruction fields (split into registers) */
#define CDNS_XSPI_CMD_INSTR_TYPE GENMASK(6, 0)
#define CDNS_XSPI_CMD_P1_R1_ADDR0 GENMASK(31, 24)
#define CDNS_XSPI_CMD_P1_R2_ADDR1 GENMASK(7, 0)
#define CDNS_XSPI_CMD_P1_R2_ADDR2 GENMASK(15, 8)
#define CDNS_XSPI_CMD_P1_R2_ADDR3 GENMASK(23, 16)
#define CDNS_XSPI_CMD_P1_R2_ADDR4 GENMASK(31, 24)
#define CDNS_XSPI_CMD_P1_R3_ADDR5 GENMASK(7, 0)
#define CDNS_XSPI_CMD_P1_R3_CMD GENMASK(23, 16)
#define CDNS_XSPI_CMD_P1_R3_NUM_ADDR_BYTES GENMASK(30, 28)
#define CDNS_XSPI_CMD_P1_R4_ADDR_IOS GENMASK(1, 0)
#define CDNS_XSPI_CMD_P1_R4_CMD_IOS GENMASK(9, 8)
#define CDNS_XSPI_CMD_P1_R4_BANK GENMASK(14, 12)
/* STIG data sequence instruction fields (split into registers) */
#define CDNS_XSPI_CMD_DSEQ_R2_DCNT_L GENMASK(31, 16)
#define CDNS_XSPI_CMD_DSEQ_R3_DCNT_H GENMASK(15, 0)
#define CDNS_XSPI_CMD_DSEQ_R3_NUM_OF_DUMMY GENMASK(25, 20)
#define CDNS_XSPI_CMD_DSEQ_R4_BANK GENMASK(14, 12)
#define CDNS_XSPI_CMD_DSEQ_R4_DATA_IOS GENMASK(9, 8)
#define CDNS_XSPI_CMD_DSEQ_R4_DIR BIT(4)
/* STIG command status fields */
#define CDNS_XSPI_CMD_STATUS_COMPLETED BIT(15)
#define CDNS_XSPI_CMD_STATUS_FAILED BIT(14)
#define CDNS_XSPI_CMD_STATUS_DQS_ERROR BIT(3)
#define CDNS_XSPI_CMD_STATUS_CRC_ERROR BIT(2)
#define CDNS_XSPI_CMD_STATUS_BUS_ERROR BIT(1)
#define CDNS_XSPI_CMD_STATUS_INV_SEQ_ERROR BIT(0)
#define CDNS_XSPI_STIG_DONE_FLAG BIT(0)
#define CDNS_XSPI_TRD_STATUS 0x0104
#define MODE_NO_OF_BYTES GENMASK(25, 24)
#define MODEBYTES_COUNT 1
/* Helper macros for filling command registers */
#define CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_1(op, data_phase) ( \
FIELD_PREP(CDNS_XSPI_CMD_INSTR_TYPE, (data_phase) ? \
CDNS_XSPI_STIG_INSTR_TYPE_1 : CDNS_XSPI_STIG_INSTR_TYPE_0) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R1_ADDR0, (op)->addr.val & 0xff))
#define CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_2(op) ( \
FIELD_PREP(CDNS_XSPI_CMD_P1_R2_ADDR1, ((op)->addr.val >> 8) & 0xFF) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R2_ADDR2, ((op)->addr.val >> 16) & 0xFF) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R2_ADDR3, ((op)->addr.val >> 24) & 0xFF) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R2_ADDR4, ((op)->addr.val >> 32) & 0xFF))
#define CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_3(op, modebytes) ( \
FIELD_PREP(CDNS_XSPI_CMD_P1_R3_ADDR5, ((op)->addr.val >> 40) & 0xFF) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R3_CMD, (op)->cmd.opcode) | \
FIELD_PREP(MODE_NO_OF_BYTES, modebytes) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R3_NUM_ADDR_BYTES, (op)->addr.nbytes))
#define CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_4(op, chipsel) ( \
FIELD_PREP(CDNS_XSPI_CMD_P1_R4_ADDR_IOS, ilog2((op)->addr.buswidth)) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R4_CMD_IOS, ilog2((op)->cmd.buswidth)) | \
FIELD_PREP(CDNS_XSPI_CMD_P1_R4_BANK, chipsel))
#define CDNS_XSPI_CMD_FLD_DSEQ_CMD_1 \
FIELD_PREP(CDNS_XSPI_CMD_INSTR_TYPE, CDNS_XSPI_STIG_INSTR_TYPE_DATA_SEQ)
#define CDNS_XSPI_CMD_FLD_DSEQ_CMD_2(op) \
FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R2_DCNT_L, (op)->data.nbytes & 0xFFFF)
#define CDNS_XSPI_CMD_FLD_DSEQ_CMD_3(op, dummybytes) ( \
FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R3_DCNT_H, \
((op)->data.nbytes >> 16) & 0xffff) | \
FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R3_NUM_OF_DUMMY, \
(op)->dummy.buswidth != 0 ? \
(((dummybytes) * 8) / (op)->dummy.buswidth) : \
0))
#define CDNS_XSPI_CMD_FLD_DSEQ_CMD_4(op, chipsel) ( \
FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R4_BANK, chipsel) | \
FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R4_DATA_IOS, \
ilog2((op)->data.buswidth)) | \
FIELD_PREP(CDNS_XSPI_CMD_DSEQ_R4_DIR, \
((op)->data.dir == SPI_MEM_DATA_IN) ? \
CDNS_XSPI_STIG_CMD_DIR_READ : CDNS_XSPI_STIG_CMD_DIR_WRITE))
enum cdns_xspi_stig_instr_type {
CDNS_XSPI_STIG_INSTR_TYPE_0,
CDNS_XSPI_STIG_INSTR_TYPE_1,
CDNS_XSPI_STIG_INSTR_TYPE_DATA_SEQ = 127,
};
enum cdns_xspi_sdma_dir {
CDNS_XSPI_SDMA_DIR_READ,
CDNS_XSPI_SDMA_DIR_WRITE,
};
enum cdns_xspi_stig_cmd_dir {
CDNS_XSPI_STIG_CMD_DIR_READ,
CDNS_XSPI_STIG_CMD_DIR_WRITE,
};
struct cdns_xspi_plat {
struct device *dev;
struct reset_ctl_bulk *resets;
void __iomem *iobase;
void __iomem *auxbase;
void __iomem *sdmabase;
int cur_cs;
unsigned int sdmasize;
bool sdma_error;
void *in_buffer;
const void *out_buffer;
u8 hw_num_banks;
void (*sdma_handler)(struct cdns_xspi_plat *cdns_xspi);
void (*set_interrupts_handler)(struct cdns_xspi_plat *cdns_xspi, bool enabled);
};
#endif /* __CADENCE_XSPI_H__ */
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