// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) Sunplus Inc. * Author: Tony Huang <[email protected]> * Author: Li-hao Kuo <[email protected]> */ #include <linux/bitfield.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/dma-mapping.h> #include <linux/interrupt.h> #include <linux/iopoll.h> #include <linux/mmc/core.h> #include <linux/mmc/host.h> #include <linux/mmc/mmc.h> #include <linux/mmc/sdio.h> #include <linux/mmc/slot-gpio.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm.h> #include <linux/pm_runtime.h> #include <linux/reset.h> #define SPMMC_MIN_CLK … #define SPMMC_MAX_CLK … #define SPMMC_MAX_BLK_COUNT … #define SPMMC_MAX_TUNABLE_DLY … #define SPMMC_TIMEOUT_US … #define SPMMC_POLL_DELAY_US … #define SPMMC_CARD_MEDIATYPE_SRCDST_REG … #define SPMMC_MEDIA_TYPE … #define SPMMC_DMA_SOURCE … #define SPMMC_DMA_DESTINATION … #define SPMMC_MEDIA_NONE … #define SPMMC_MEDIA_SD … #define SPMMC_MEDIA_MS … #define SPMMC_SDRAM_SECTOR_0_SIZE_REG … #define SPMMC_DMA_BASE_ADDR_REG … #define SPMMC_HW_DMA_CTRL_REG … #define SPMMC_HW_DMA_RST … #define SPMMC_DMAIDLE … #define SPMMC_MAX_DMA_MEMORY_SECTORS … #define SPMMC_SDRAM_SECTOR_1_ADDR_REG … #define SPMMC_SDRAM_SECTOR_1_LENG_REG … #define SPMMC_SDRAM_SECTOR_2_ADDR_REG … #define SPMMC_SDRAM_SECTOR_2_LENG_REG … #define SPMMC_SDRAM_SECTOR_3_ADDR_REG … #define SPMMC_SDRAM_SECTOR_3_LENG_REG … #define SPMMC_SDRAM_SECTOR_4_ADDR_REG … #define SPMMC_SDRAM_SECTOR_4_LENG_REG … #define SPMMC_SDRAM_SECTOR_5_ADDR_REG … #define SPMMC_SDRAM_SECTOR_5_LENG_REG … #define SPMMC_SDRAM_SECTOR_6_ADDR_REG … #define SPMMC_SDRAM_SECTOR_6_LENG_REG … #define SPMMC_SDRAM_SECTOR_7_ADDR_REG … #define SPMMC_SDRAM_SECTOR_7_LENG_REG … #define SPMMC_SD_INT_REG … #define SPMMC_SDINT_SDCMPEN … #define SPMMC_SDINT_SDCMP … #define SPMMC_SDINT_SDCMPCLR … #define SPMMC_SDINT_SDIOEN … #define SPMMC_SDINT_SDIO … #define SPMMC_SDINT_SDIOCLR … #define SPMMC_SD_PAGE_NUM_REG … #define SPMMC_SD_CONFIG0_REG … #define SPMMC_SD_PIO_MODE … #define SPMMC_SD_DDR_MODE … #define SPMMC_SD_LEN_MODE … #define SPMMC_SD_TRANS_MODE … #define SPMMC_SD_AUTO_RESPONSE … #define SPMMC_SD_CMD_DUMMY … #define SPMMC_SD_RSP_CHK_EN … #define SPMMC_SDIO_MODE … #define SPMMC_SD_MMC_MODE … #define SPMMC_SD_DATA_WD … #define SPMMC_RX4_EN … #define SPMMC_SD_RSP_TYPE … #define SPMMC_MMC8_EN … #define SPMMC_CLOCK_DIVISION … #define SPMMC_SDIO_CTRL_REG … #define SPMMC_INT_MULTI_TRIG … #define SPMMC_SD_RST_REG … #define SPMMC_SD_CTRL_REG … #define SPMMC_NEW_COMMAND_TRIGGER … #define SPMMC_DUMMY_CLOCK_TRIGGER … #define SPMMC_SD_STATUS_REG … #define SPMMC_SDSTATUS_DUMMY_READY … #define SPMMC_SDSTATUS_RSP_BUF_FULL … #define SPMMC_SDSTATUS_TX_DATA_BUF_EMPTY … #define SPMMC_SDSTATUS_RX_DATA_BUF_FULL … #define SPMMC_SDSTATUS_CMD_PIN_STATUS … #define SPMMC_SDSTATUS_DAT0_PIN_STATUS … #define SPMMC_SDSTATUS_RSP_TIMEOUT … #define SPMMC_SDSTATUS_CARD_CRC_CHECK_TIMEOUT … #define SPMMC_SDSTATUS_STB_TIMEOUT … #define SPMMC_SDSTATUS_RSP_CRC7_ERROR … #define SPMMC_SDSTATUS_CRC_TOKEN_CHECK_ERROR … #define SPMMC_SDSTATUS_RDATA_CRC16_ERROR … #define SPMMC_SDSTATUS_SUSPEND_STATE_READY … #define SPMMC_SDSTATUS_BUSY_CYCLE … #define SPMMC_SDSTATUS_DAT1_PIN_STATUS … #define SPMMC_SDSTATUS_SD_SENSE_STATUS … #define SPMMC_SDSTATUS_BOOT_ACK_TIMEOUT … #define SPMMC_SDSTATUS_BOOT_DATA_TIMEOUT … #define SPMMC_SDSTATUS_BOOT_ACK_ERROR … #define SPMMC_SD_STATE_REG … #define SPMMC_CRCTOKEN_CHECK_RESULT … #define SPMMC_SDSTATE_ERROR … #define SPMMC_SDSTATE_FINISH … #define SPMMC_SD_HW_STATE_REG … #define SPMMC_SD_BLOCKSIZE_REG … #define SPMMC_SD_CONFIG1_REG … #define SPMMC_TX_DUMMY_NUM … #define SPMMC_SD_HIGH_SPEED_EN … #define SPMMC_SD_TIMING_CONFIG0_REG … #define SPMMC_SD_CLOCK_DELAY … #define SPMMC_SD_WRITE_DATA_DELAY … #define SPMMC_SD_WRITE_COMMAND_DELAY … #define SPMMC_SD_READ_RESPONSE_DELAY … #define SPMMC_SD_READ_DATA_DELAY … #define SPMMC_SD_READ_CRC_DELAY … #define SPMMC_SD_PIODATATX_REG … #define SPMMC_SD_PIODATARX_REG … #define SPMMC_SD_CMDBUF0_3_REG … #define SPMMC_SD_CMDBUF4_REG … #define SPMMC_SD_RSPBUF0_3_REG … #define SPMMC_SD_RSPBUF4_5_REG … #define SPMMC_MAX_RETRIES … struct spmmc_tuning_info { … }; #define SPMMC_DMA_MODE … #define SPMMC_PIO_MODE … struct spmmc_host { … }; static inline int spmmc_wait_finish(struct spmmc_host *host) { … } static inline int spmmc_wait_sdstatus(struct spmmc_host *host, unsigned int status_bit) { … } #define spmmc_wait_rspbuf_full(host) … #define spmmc_wait_rxbuf_full(host) … #define spmmc_wait_txbuf_empty(host) … static void spmmc_get_rsp(struct spmmc_host *host, struct mmc_command *cmd) { … } static void spmmc_set_bus_clk(struct spmmc_host *host, int clk) { … } static void spmmc_set_bus_timing(struct spmmc_host *host, unsigned int timing) { … } static void spmmc_set_bus_width(struct spmmc_host *host, int width) { … } /* * select the working mode of controller: sd/sdio/emmc */ static void spmmc_set_sdmmc_mode(struct spmmc_host *host) { … } static void spmmc_sw_reset(struct spmmc_host *host) { … } static void spmmc_prepare_cmd(struct spmmc_host *host, struct mmc_command *cmd) { … } static void spmmc_prepare_data(struct spmmc_host *host, struct mmc_data *data) { … } static inline void spmmc_trigger_transaction(struct spmmc_host *host) { … } static void spmmc_send_stop_cmd(struct spmmc_host *host) { … } static int spmmc_check_error(struct spmmc_host *host, struct mmc_request *mrq) { … } /* * the strategy is: * 1. if several continuous delays are acceptable, we choose a middle one; * 2. otherwise, we choose the first one. */ static inline int spmmc_find_best_delay(u8 candidate_dly) { … } static void spmmc_xfer_data_pio(struct spmmc_host *host, struct mmc_data *data) { … } static void spmmc_controller_init(struct spmmc_host *host) { … } /* * 1. unmap scatterlist if needed; * 2. get response & check error conditions; * 3. notify mmc layer the request is done */ static void spmmc_finish_request(struct spmmc_host *host, struct mmc_request *mrq) { … } /* Interrupt Service Routine */ static irqreturn_t spmmc_irq(int irq, void *dev_id) { … } static void spmmc_request(struct mmc_host *mmc, struct mmc_request *mrq) { … } static void spmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) { … } /* * Return values for the get_cd callback should be: * 0 for a absent card * 1 for a present card * -ENOSYS when not supported (equal to NULL callback) * or a negative errno value when something bad happened */ static int spmmc_get_cd(struct mmc_host *mmc) { … } static int spmmc_execute_tuning(struct mmc_host *mmc, u32 opcode) { … } static const struct mmc_host_ops spmmc_ops = …; static irqreturn_t spmmc_func_finish_req(int irq, void *dev_id) { … } static int spmmc_drv_probe(struct platform_device *pdev) { … } static void spmmc_drv_remove(struct platform_device *dev) { … } static int spmmc_pm_runtime_suspend(struct device *dev) { … } static int spmmc_pm_runtime_resume(struct device *dev) { … } static DEFINE_RUNTIME_DEV_PM_OPS(spmmc_pm_ops, spmmc_pm_runtime_suspend, spmmc_pm_runtime_resume, NULL); static const struct of_device_id spmmc_of_table[] = …; MODULE_DEVICE_TABLE(of, spmmc_of_table); static struct platform_driver spmmc_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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