// SPDX-License-Identifier: GPL-2.0+ // Cadence XSPI flash controller driver // Copyright (C) 2020-21 Cadence #include <linux/completion.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/errno.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/spi/spi.h> #include <linux/spi/spi-mem.h> #include <linux/bitfield.h> #include <linux/limits.h> #include <linux/log2.h> #define CDNS_XSPI_MAGIC_NUM_VALUE … #define CDNS_XSPI_MAX_BANKS … #define CDNS_XSPI_NAME … /* * Note: below are additional auxiliary registers to * configure XSPI controller pin-strap settings */ /* PHY DQ timing register */ #define CDNS_XSPI_CCP_PHY_DQ_TIMING … /* PHY DQS timing register */ #define CDNS_XSPI_CCP_PHY_DQS_TIMING … /* PHY gate loopback control register */ #define CDNS_XSPI_CCP_PHY_GATE_LPBCK_CTRL … /* PHY DLL slave control register */ #define CDNS_XSPI_CCP_PHY_DLL_SLAVE_CTRL … /* DLL PHY control register */ #define CDNS_XSPI_DLL_PHY_CTRL … /* Command registers */ #define CDNS_XSPI_CMD_REG_0 … #define CDNS_XSPI_CMD_REG_1 … #define CDNS_XSPI_CMD_REG_2 … #define CDNS_XSPI_CMD_REG_3 … #define CDNS_XSPI_CMD_REG_4 … #define CDNS_XSPI_CMD_REG_5 … /* Command status registers */ #define CDNS_XSPI_CMD_STATUS_REG … /* Controller status register */ #define CDNS_XSPI_CTRL_STATUS_REG … #define CDNS_XSPI_INIT_COMPLETED … #define CDNS_XSPI_INIT_LEGACY … #define CDNS_XSPI_INIT_FAIL … #define CDNS_XSPI_CTRL_BUSY … /* Controller interrupt status register */ #define CDNS_XSPI_INTR_STATUS_REG … #define CDNS_XSPI_STIG_DONE … #define CDNS_XSPI_SDMA_ERROR … #define CDNS_XSPI_SDMA_TRIGGER … #define CDNS_XSPI_CMD_IGNRD_EN … #define CDNS_XSPI_DDMA_TERR_EN … #define CDNS_XSPI_CDMA_TREE_EN … #define CDNS_XSPI_CTRL_IDLE_EN … #define CDNS_XSPI_TRD_COMP_INTR_STATUS … #define CDNS_XSPI_TRD_ERR_INTR_STATUS … #define CDNS_XSPI_TRD_ERR_INTR_EN … /* Controller interrupt enable register */ #define CDNS_XSPI_INTR_ENABLE_REG … #define CDNS_XSPI_INTR_EN … #define CDNS_XSPI_STIG_DONE_EN … #define CDNS_XSPI_SDMA_ERROR_EN … #define CDNS_XSPI_SDMA_TRIGGER_EN … #define CDNS_XSPI_INTR_MASK … /* Controller config register */ #define CDNS_XSPI_CTRL_CONFIG_REG … #define CDNS_XSPI_CTRL_WORK_MODE … #define CDNS_XSPI_WORK_MODE_DIRECT … #define CDNS_XSPI_WORK_MODE_STIG … #define CDNS_XSPI_WORK_MODE_ACMD … /* SDMA trigger transaction registers */ #define CDNS_XSPI_SDMA_SIZE_REG … #define CDNS_XSPI_SDMA_TRD_INFO_REG … #define CDNS_XSPI_SDMA_DIR … /* Controller features register */ #define CDNS_XSPI_CTRL_FEATURES_REG … #define CDNS_XSPI_NUM_BANKS … #define CDNS_XSPI_DMA_DATA_WIDTH … #define CDNS_XSPI_NUM_THREADS … /* Controller version register */ #define CDNS_XSPI_CTRL_VERSION_REG … #define CDNS_XSPI_MAGIC_NUM … #define CDNS_XSPI_CTRL_REV … /* STIG Profile 1.0 instruction fields (split into registers) */ #define CDNS_XSPI_CMD_INSTR_TYPE … #define CDNS_XSPI_CMD_P1_R1_ADDR0 … #define CDNS_XSPI_CMD_P1_R2_ADDR1 … #define CDNS_XSPI_CMD_P1_R2_ADDR2 … #define CDNS_XSPI_CMD_P1_R2_ADDR3 … #define CDNS_XSPI_CMD_P1_R2_ADDR4 … #define CDNS_XSPI_CMD_P1_R3_ADDR5 … #define CDNS_XSPI_CMD_P1_R3_CMD … #define CDNS_XSPI_CMD_P1_R3_NUM_ADDR_BYTES … #define CDNS_XSPI_CMD_P1_R4_ADDR_IOS … #define CDNS_XSPI_CMD_P1_R4_CMD_IOS … #define CDNS_XSPI_CMD_P1_R4_BANK … /* STIG data sequence instruction fields (split into registers) */ #define CDNS_XSPI_CMD_DSEQ_R2_DCNT_L … #define CDNS_XSPI_CMD_DSEQ_R3_DCNT_H … #define CDNS_XSPI_CMD_DSEQ_R3_NUM_OF_DUMMY … #define CDNS_XSPI_CMD_DSEQ_R4_BANK … #define CDNS_XSPI_CMD_DSEQ_R4_DATA_IOS … #define CDNS_XSPI_CMD_DSEQ_R4_DIR … /* STIG command status fields */ #define CDNS_XSPI_CMD_STATUS_COMPLETED … #define CDNS_XSPI_CMD_STATUS_FAILED … #define CDNS_XSPI_CMD_STATUS_DQS_ERROR … #define CDNS_XSPI_CMD_STATUS_CRC_ERROR … #define CDNS_XSPI_CMD_STATUS_BUS_ERROR … #define CDNS_XSPI_CMD_STATUS_INV_SEQ_ERROR … #define CDNS_XSPI_STIG_DONE_FLAG … #define CDNS_XSPI_TRD_STATUS … #define MODE_NO_OF_BYTES … #define MODEBYTES_COUNT … /* Helper macros for filling command registers */ #define CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_1(op, data_phase) … #define CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_2(op) … #define CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_3(op, modebytes) … #define CDNS_XSPI_CMD_FLD_P1_INSTR_CMD_4(op, chipsel) … #define CDNS_XSPI_CMD_FLD_DSEQ_CMD_1(op) … #define CDNS_XSPI_CMD_FLD_DSEQ_CMD_2(op) … #define CDNS_XSPI_CMD_FLD_DSEQ_CMD_3(op, dummybytes) … #define CDNS_XSPI_CMD_FLD_DSEQ_CMD_4(op, chipsel) … enum cdns_xspi_stig_instr_type { … }; enum cdns_xspi_sdma_dir { … }; enum cdns_xspi_stig_cmd_dir { … }; struct cdns_xspi_dev { … }; static int cdns_xspi_wait_for_controller_idle(struct cdns_xspi_dev *cdns_xspi) { … } static void cdns_xspi_trigger_command(struct cdns_xspi_dev *cdns_xspi, u32 cmd_regs[6]) { … } static int cdns_xspi_check_command_status(struct cdns_xspi_dev *cdns_xspi) { … } static void cdns_xspi_set_interrupts(struct cdns_xspi_dev *cdns_xspi, bool enabled) { … } static int cdns_xspi_controller_init(struct cdns_xspi_dev *cdns_xspi) { … } static void cdns_xspi_sdma_handle(struct cdns_xspi_dev *cdns_xspi) { … } static int cdns_xspi_send_stig_command(struct cdns_xspi_dev *cdns_xspi, const struct spi_mem_op *op, bool data_phase) { … } static int cdns_xspi_mem_op(struct cdns_xspi_dev *cdns_xspi, struct spi_mem *mem, const struct spi_mem_op *op) { … } static int cdns_xspi_mem_op_execute(struct spi_mem *mem, const struct spi_mem_op *op) { … } static int cdns_xspi_adjust_mem_op_size(struct spi_mem *mem, struct spi_mem_op *op) { … } static const struct spi_controller_mem_ops cadence_xspi_mem_ops = …; static irqreturn_t cdns_xspi_irq_handler(int this_irq, void *dev) { … } static int cdns_xspi_of_get_plat_data(struct platform_device *pdev) { … } static void cdns_xspi_print_phy_config(struct cdns_xspi_dev *cdns_xspi) { … } static int cdns_xspi_probe(struct platform_device *pdev) { … } static const struct of_device_id cdns_xspi_of_match[] = …; MODULE_DEVICE_TABLE(of, cdns_xspi_of_match); static struct platform_driver cdns_xspi_platform_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …;
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