// SPDX-License-Identifier: GPL-2.0 // // Mediatek SPI NOR controller driver // // Copyright (C) 2020 Chuanhong Guo <[email protected]> #include <linux/bits.h> #include <linux/clk.h> #include <linux/completion.h> #include <linux/dma-mapping.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/string.h> #define DRIVER_NAME … #define MTK_NOR_REG_CMD … #define MTK_NOR_CMD_WRITE … #define MTK_NOR_CMD_PROGRAM … #define MTK_NOR_CMD_READ … #define MTK_NOR_CMD_MASK … #define MTK_NOR_REG_PRG_CNT … #define MTK_NOR_PRG_CNT_MAX … #define MTK_NOR_REG_RDATA … #define MTK_NOR_REG_RADR0 … #define MTK_NOR_REG_RADR(n) … #define MTK_NOR_REG_RADR3 … #define MTK_NOR_REG_WDATA … #define MTK_NOR_REG_PRGDATA0 … #define MTK_NOR_REG_PRGDATA(n) … #define MTK_NOR_REG_PRGDATA_MAX … #define MTK_NOR_REG_SHIFT0 … #define MTK_NOR_REG_SHIFT(n) … #define MTK_NOR_REG_SHIFT_MAX … #define MTK_NOR_REG_CFG1 … #define MTK_NOR_FAST_READ … #define MTK_NOR_REG_CFG2 … #define MTK_NOR_WR_CUSTOM_OP_EN … #define MTK_NOR_WR_BUF_EN … #define MTK_NOR_REG_PP_DATA … #define MTK_NOR_REG_IRQ_STAT … #define MTK_NOR_REG_IRQ_EN … #define MTK_NOR_IRQ_DMA … #define MTK_NOR_IRQ_MASK … #define MTK_NOR_REG_CFG3 … #define MTK_NOR_DISABLE_WREN … #define MTK_NOR_DISABLE_SR_POLL … #define MTK_NOR_REG_WP … #define MTK_NOR_ENABLE_SF_CMD … #define MTK_NOR_REG_BUSCFG … #define MTK_NOR_4B_ADDR … #define MTK_NOR_QUAD_ADDR … #define MTK_NOR_QUAD_READ … #define MTK_NOR_DUAL_ADDR … #define MTK_NOR_DUAL_READ … #define MTK_NOR_BUS_MODE_MASK … #define MTK_NOR_REG_DMA_CTL … #define MTK_NOR_DMA_START … #define MTK_NOR_REG_DMA_FADR … #define MTK_NOR_REG_DMA_DADR … #define MTK_NOR_REG_DMA_END_DADR … #define MTK_NOR_REG_CG_DIS … #define MTK_NOR_SFC_SW_RST … #define MTK_NOR_REG_DMA_DADR_HB … #define MTK_NOR_REG_DMA_END_DADR_HB … #define MTK_NOR_PRG_MAX_SIZE … // Reading DMA src/dst addresses have to be 16-byte aligned #define MTK_NOR_DMA_ALIGN … #define MTK_NOR_DMA_ALIGN_MASK … // and we allocate a bounce buffer if destination address isn't aligned. #define MTK_NOR_BOUNCE_BUF_SIZE … // Buffered page program can do one 128-byte transfer #define MTK_NOR_PP_SIZE … #define CLK_TO_US(sp, clkcnt) … struct mtk_nor_caps { … }; struct mtk_nor { … }; static inline void mtk_nor_rmw(struct mtk_nor *sp, u32 reg, u32 set, u32 clr) { … } static inline int mtk_nor_cmd_exec(struct mtk_nor *sp, u32 cmd, ulong clk) { … } static void mtk_nor_reset(struct mtk_nor *sp) { … } static void mtk_nor_set_addr(struct mtk_nor *sp, const struct spi_mem_op *op) { … } static bool need_bounce(struct mtk_nor *sp, const struct spi_mem_op *op) { … } static bool mtk_nor_match_read(const struct spi_mem_op *op) { … } static bool mtk_nor_match_prg(const struct spi_mem_op *op) { … } static void mtk_nor_adj_prg_size(struct spi_mem_op *op) { … } static int mtk_nor_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op) { … } static bool mtk_nor_supports_op(struct spi_mem *mem, const struct spi_mem_op *op) { … } static void mtk_nor_setup_bus(struct mtk_nor *sp, const struct spi_mem_op *op) { … } static int mtk_nor_dma_exec(struct mtk_nor *sp, u32 from, unsigned int length, dma_addr_t dma_addr) { … } static int mtk_nor_read_bounce(struct mtk_nor *sp, const struct spi_mem_op *op) { … } static int mtk_nor_read_dma(struct mtk_nor *sp, const struct spi_mem_op *op) { … } static int mtk_nor_read_pio(struct mtk_nor *sp, const struct spi_mem_op *op) { … } static int mtk_nor_setup_write_buffer(struct mtk_nor *sp, bool on) { … } static int mtk_nor_pp_buffered(struct mtk_nor *sp, const struct spi_mem_op *op) { … } static int mtk_nor_pp_unbuffered(struct mtk_nor *sp, const struct spi_mem_op *op) { … } static int mtk_nor_spi_mem_prg(struct mtk_nor *sp, const struct spi_mem_op *op) { … } static int mtk_nor_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) { … } static int mtk_nor_setup(struct spi_device *spi) { … } static int mtk_nor_transfer_one_message(struct spi_controller *host, struct spi_message *m) { … } static void mtk_nor_disable_clk(struct mtk_nor *sp) { … } static int mtk_nor_enable_clk(struct mtk_nor *sp) { … } static void mtk_nor_init(struct mtk_nor *sp) { … } static irqreturn_t mtk_nor_irq_handler(int irq, void *data) { … } static size_t mtk_max_msg_size(struct spi_device *spi) { … } static const struct spi_controller_mem_ops mtk_nor_mem_ops = …; static const struct mtk_nor_caps mtk_nor_caps_mt8173 = …; static const struct mtk_nor_caps mtk_nor_caps_mt8186 = …; static const struct mtk_nor_caps mtk_nor_caps_mt8192 = …; static const struct of_device_id mtk_nor_match[] = …; MODULE_DEVICE_TABLE(of, mtk_nor_match); static int mtk_nor_probe(struct platform_device *pdev) { … } static void mtk_nor_remove(struct platform_device *pdev) { … } static int __maybe_unused mtk_nor_runtime_suspend(struct device *dev) { … } static int __maybe_unused mtk_nor_runtime_resume(struct device *dev) { … } static int __maybe_unused mtk_nor_suspend(struct device *dev) { … } static int __maybe_unused mtk_nor_resume(struct device *dev) { … } static const struct dev_pm_ops mtk_nor_pm_ops = …; static struct platform_driver mtk_nor_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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