// SPDX-License-Identifier: GPL-2.0-or-later /* * davinci_mmc.c - TI DaVinci MMC/SD/SDIO driver * * Copyright (C) 2006 Texas Instruments. * Original author: Purushotam Kumar * Copyright (C) 2009 David Brownell */ #include <linux/module.h> #include <linux/ioport.h> #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/err.h> #include <linux/cpufreq.h> #include <linux/mmc/host.h> #include <linux/io.h> #include <linux/irq.h> #include <linux/delay.h> #include <linux/dmaengine.h> #include <linux/dma-mapping.h> #include <linux/mmc/mmc.h> #include <linux/of.h> #include <linux/mmc/slot-gpio.h> #include <linux/interrupt.h> #include <linux/platform_data/mmc-davinci.h> /* * Register Definitions */ #define DAVINCI_MMCCTL … #define DAVINCI_MMCCLK … #define DAVINCI_MMCST0 … #define DAVINCI_MMCST1 … #define DAVINCI_MMCIM … #define DAVINCI_MMCTOR … #define DAVINCI_MMCTOD … #define DAVINCI_MMCBLEN … #define DAVINCI_MMCNBLK … #define DAVINCI_MMCNBLC … #define DAVINCI_MMCDRR … #define DAVINCI_MMCDXR … #define DAVINCI_MMCCMD … #define DAVINCI_MMCARGHL … #define DAVINCI_MMCRSP01 … #define DAVINCI_MMCRSP23 … #define DAVINCI_MMCRSP45 … #define DAVINCI_MMCRSP67 … #define DAVINCI_MMCDRSP … #define DAVINCI_MMCETOK … #define DAVINCI_MMCCIDX … #define DAVINCI_MMCCKC … #define DAVINCI_MMCTORC … #define DAVINCI_MMCTODC … #define DAVINCI_MMCBLNC … #define DAVINCI_SDIOCTL … #define DAVINCI_SDIOST0 … #define DAVINCI_SDIOIEN … #define DAVINCI_SDIOIST … #define DAVINCI_MMCFIFOCTL … /* DAVINCI_MMCCTL definitions */ #define MMCCTL_DATRST … #define MMCCTL_CMDRST … #define MMCCTL_WIDTH_8_BIT … #define MMCCTL_WIDTH_4_BIT … #define MMCCTL_DATEG_DISABLED … #define MMCCTL_DATEG_RISING … #define MMCCTL_DATEG_FALLING … #define MMCCTL_DATEG_BOTH … #define MMCCTL_PERMDR_LE … #define MMCCTL_PERMDR_BE … #define MMCCTL_PERMDX_LE … #define MMCCTL_PERMDX_BE … /* DAVINCI_MMCCLK definitions */ #define MMCCLK_CLKEN … #define MMCCLK_CLKRT_MASK … /* IRQ bit definitions, for DAVINCI_MMCST0 and DAVINCI_MMCIM */ #define MMCST0_DATDNE … #define MMCST0_BSYDNE … #define MMCST0_RSPDNE … #define MMCST0_TOUTRD … #define MMCST0_TOUTRS … #define MMCST0_CRCWR … #define MMCST0_CRCRD … #define MMCST0_CRCRS … #define MMCST0_DXRDY … #define MMCST0_DRRDY … #define MMCST0_DATED … #define MMCST0_TRNDNE … /* DAVINCI_MMCST1 definitions */ #define MMCST1_BUSY … /* DAVINCI_MMCCMD definitions */ #define MMCCMD_CMD_MASK … #define MMCCMD_PPLEN … #define MMCCMD_BSYEXP … #define MMCCMD_RSPFMT_MASK … #define MMCCMD_RSPFMT_NONE … #define MMCCMD_RSPFMT_R1456 … #define MMCCMD_RSPFMT_R2 … #define MMCCMD_RSPFMT_R3 … #define MMCCMD_DTRW … #define MMCCMD_STRMTP … #define MMCCMD_WDATX … #define MMCCMD_INITCK … #define MMCCMD_DCLR … #define MMCCMD_DMATRIG … /* DAVINCI_MMCFIFOCTL definitions */ #define MMCFIFOCTL_FIFORST … #define MMCFIFOCTL_FIFODIR_WR … #define MMCFIFOCTL_FIFODIR_RD … #define MMCFIFOCTL_FIFOLEV … #define MMCFIFOCTL_ACCWD_4 … #define MMCFIFOCTL_ACCWD_3 … #define MMCFIFOCTL_ACCWD_2 … #define MMCFIFOCTL_ACCWD_1 … /* DAVINCI_SDIOST0 definitions */ #define SDIOST0_DAT1_HI … /* DAVINCI_SDIOIEN definitions */ #define SDIOIEN_IOINTEN … /* DAVINCI_SDIOIST definitions */ #define SDIOIST_IOINT … /* MMCSD Init clock in Hz in opendrain mode */ #define MMCSD_INIT_CLOCK … /* * One scatterlist dma "segment" is at most MAX_CCNT rw_threshold units, * and we handle up to MAX_NR_SG segments. MMC_BLOCK_BOUNCE kicks in only * for drivers with max_segs == 1, making the segments bigger (64KB) * than the page or two that's otherwise typical. nr_sg (passed from * platform data) == 16 gives at least the same throughput boost, using * EDMA transfer linkage instead of spending CPU time copying pages. */ #define MAX_CCNT … #define MAX_NR_SG … static unsigned rw_threshold = …; module_param(rw_threshold, uint, S_IRUGO); MODULE_PARM_DESC(…) …; static unsigned poll_threshold = …; module_param(poll_threshold, uint, S_IRUGO); MODULE_PARM_DESC(…) …; static unsigned poll_loopcount = …; module_param(poll_loopcount, uint, S_IRUGO); MODULE_PARM_DESC(…) …; static unsigned use_dma = …; module_param(use_dma, uint, 0); MODULE_PARM_DESC(…) …; struct mmc_davinci_host { … }; static irqreturn_t mmc_davinci_irq(int irq, void *dev_id); /* PIO only */ static void davinci_fifo_data_trans(struct mmc_davinci_host *host, unsigned int n) { … } static void mmc_davinci_start_command(struct mmc_davinci_host *host, struct mmc_command *cmd) { … } /*----------------------------------------------------------------------*/ /* DMA infrastructure */ static void davinci_abort_dma(struct mmc_davinci_host *host) { … } static int mmc_davinci_send_dma_request(struct mmc_davinci_host *host, struct mmc_data *data) { … } static int mmc_davinci_start_dma_transfer(struct mmc_davinci_host *host, struct mmc_data *data) { … } static void davinci_release_dma_channels(struct mmc_davinci_host *host) { … } static int davinci_acquire_dma_channels(struct mmc_davinci_host *host) { … } /*----------------------------------------------------------------------*/ static void mmc_davinci_prepare_data(struct mmc_davinci_host *host, struct mmc_request *req) { … } static void mmc_davinci_request(struct mmc_host *mmc, struct mmc_request *req) { … } static unsigned int calculate_freq_for_card(struct mmc_davinci_host *host, unsigned int mmc_req_freq) { … } static void calculate_clk_divider(struct mmc_host *mmc, struct mmc_ios *ios) { … } static void mmc_davinci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) { … } static void mmc_davinci_xfer_done(struct mmc_davinci_host *host, struct mmc_data *data) { … } static void mmc_davinci_cmd_done(struct mmc_davinci_host *host, struct mmc_command *cmd) { … } static inline void mmc_davinci_reset_ctrl(struct mmc_davinci_host *host, int val) { … } static void davinci_abort_data(struct mmc_davinci_host *host, struct mmc_data *data) { … } static irqreturn_t mmc_davinci_sdio_irq(int irq, void *dev_id) { … } static irqreturn_t mmc_davinci_irq(int irq, void *dev_id) { … } static int mmc_davinci_get_cd(struct mmc_host *mmc) { … } static int mmc_davinci_get_ro(struct mmc_host *mmc) { … } static void mmc_davinci_enable_sdio_irq(struct mmc_host *mmc, int enable) { … } static const struct mmc_host_ops mmc_davinci_ops = …; /*----------------------------------------------------------------------*/ #ifdef CONFIG_CPU_FREQ static int mmc_davinci_cpufreq_transition(struct notifier_block *nb, unsigned long val, void *data) { … } static inline int mmc_davinci_cpufreq_register(struct mmc_davinci_host *host) { … } static inline void mmc_davinci_cpufreq_deregister(struct mmc_davinci_host *host) { … } #else static inline int mmc_davinci_cpufreq_register(struct mmc_davinci_host *host) { return 0; } static inline void mmc_davinci_cpufreq_deregister(struct mmc_davinci_host *host) { } #endif static void init_mmcsd_host(struct mmc_davinci_host *host) { … } static const struct platform_device_id davinci_mmc_devtype[] = …; MODULE_DEVICE_TABLE(platform, davinci_mmc_devtype); static const struct of_device_id davinci_mmc_dt_ids[] = …; MODULE_DEVICE_TABLE(of, davinci_mmc_dt_ids); static int mmc_davinci_parse_pdata(struct mmc_host *mmc) { … } static int davinci_mmcsd_probe(struct platform_device *pdev) { … } static void davinci_mmcsd_remove(struct platform_device *pdev) { … } #ifdef CONFIG_PM static int davinci_mmcsd_suspend(struct device *dev) { … } static int davinci_mmcsd_resume(struct device *dev) { … } static const struct dev_pm_ops davinci_mmcsd_pm = …; #define davinci_mmcsd_pm_ops … #else #define davinci_mmcsd_pm_ops … #endif static struct platform_driver davinci_mmcsd_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …; MODULE_ALIAS(…) …;
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