// SPDX-License-Identifier: GPL-2.0-only /* linux/drivers/mmc/host/sdhci-s3c.c * * Copyright 2008 Openmoko Inc. * Copyright 2008 Simtec Electronics * Ben Dooks <[email protected]> * http://armlinux.simtec.co.uk/ * * SDHCI (HSMMC) support for Samsung SoC */ #include <linux/spinlock.h> #include <linux/delay.h> #include <linux/dma-mapping.h> #include <linux/platform_device.h> #include <linux/platform_data/mmc-sdhci-s3c.h> #include <linux/slab.h> #include <linux/clk.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of.h> #include <linux/pm.h> #include <linux/pm_runtime.h> #include <linux/mmc/host.h> #include "sdhci.h" #define MAX_BUS_CLK … #define S3C_SDHCI_CONTROL2 … #define S3C_SDHCI_CONTROL3 … #define S3C64XX_SDHCI_CONTROL4 … #define S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR … #define S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK … #define S3C_SDHCI_CTRL2_CDINVRXD3 … #define S3C_SDHCI_CTRL2_SLCARDOUT … #define S3C_SDHCI_CTRL2_FLTCLKSEL_MASK … #define S3C_SDHCI_CTRL2_FLTCLKSEL_SHIFT … #define S3C_SDHCI_CTRL2_FLTCLKSEL(_x) … #define S3C_SDHCI_CTRL2_LVLDAT_MASK … #define S3C_SDHCI_CTRL2_LVLDAT_SHIFT … #define S3C_SDHCI_CTRL2_LVLDAT(_x) … #define S3C_SDHCI_CTRL2_ENFBCLKTX … #define S3C_SDHCI_CTRL2_ENFBCLKRX … #define S3C_SDHCI_CTRL2_SDCDSEL … #define S3C_SDHCI_CTRL2_SDSIGPC … #define S3C_SDHCI_CTRL2_ENBUSYCHKTXSTART … #define S3C_SDHCI_CTRL2_DFCNT_MASK … #define S3C_SDHCI_CTRL2_DFCNT_SHIFT … #define S3C_SDHCI_CTRL2_DFCNT_NONE … #define S3C_SDHCI_CTRL2_DFCNT_4SDCLK … #define S3C_SDHCI_CTRL2_DFCNT_16SDCLK … #define S3C_SDHCI_CTRL2_DFCNT_64SDCLK … #define S3C_SDHCI_CTRL2_ENCLKOUTHOLD … #define S3C_SDHCI_CTRL2_RWAITMODE … #define S3C_SDHCI_CTRL2_DISBUFRD … #define S3C_SDHCI_CTRL2_SELBASECLK_MASK … #define S3C_SDHCI_CTRL2_SELBASECLK_SHIFT … #define S3C_SDHCI_CTRL2_PWRSYNC … #define S3C_SDHCI_CTRL2_ENCLKOUTMSKCON … #define S3C_SDHCI_CTRL2_HWINITFIN … #define S3C_SDHCI_CTRL3_FCSEL3 … #define S3C_SDHCI_CTRL3_FCSEL2 … #define S3C_SDHCI_CTRL3_FCSEL1 … #define S3C_SDHCI_CTRL3_FCSEL0 … #define S3C_SDHCI_CTRL3_FIA3_MASK … #define S3C_SDHCI_CTRL3_FIA3_SHIFT … #define S3C_SDHCI_CTRL3_FIA3(_x) … #define S3C_SDHCI_CTRL3_FIA2_MASK … #define S3C_SDHCI_CTRL3_FIA2_SHIFT … #define S3C_SDHCI_CTRL3_FIA2(_x) … #define S3C_SDHCI_CTRL3_FIA1_MASK … #define S3C_SDHCI_CTRL3_FIA1_SHIFT … #define S3C_SDHCI_CTRL3_FIA1(_x) … #define S3C_SDHCI_CTRL3_FIA0_MASK … #define S3C_SDHCI_CTRL3_FIA0_SHIFT … #define S3C_SDHCI_CTRL3_FIA0(_x) … #define S3C64XX_SDHCI_CONTROL4_DRIVE_MASK … #define S3C64XX_SDHCI_CONTROL4_DRIVE_SHIFT … #define S3C64XX_SDHCI_CONTROL4_DRIVE_2mA … #define S3C64XX_SDHCI_CONTROL4_DRIVE_4mA … #define S3C64XX_SDHCI_CONTROL4_DRIVE_7mA … #define S3C64XX_SDHCI_CONTROL4_DRIVE_9mA … #define S3C64XX_SDHCI_CONTROL4_BUSY … /** * struct sdhci_s3c - S3C SDHCI instance * @host: The SDHCI host created * @pdev: The platform device we where created from. * @ioarea: The resource created when we claimed the IO area. * @pdata: The platform data for this controller. * @cur_clk: The index of the current bus clock. * @ext_cd_irq: External card detect interrupt. * @clk_io: The clock for the internal bus interface. * @clk_rates: Clock frequencies. * @clk_bus: The clocks that are available for the SD/MMC bus clock. * @no_divider: No or non-standard internal clock divider. */ struct sdhci_s3c { … }; /** * struct sdhci_s3c_drv_data - S3C SDHCI platform specific driver data * @sdhci_quirks: sdhci host specific quirks. * @no_divider: no or non-standard internal clock divider. * @ops: sdhci_ops to use for this variant * * Specifies platform specific configuration of sdhci controller. * Note: A structure for driver specific platform data is used for future * expansion of its usage. */ struct sdhci_s3c_drv_data { … }; static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host) { … } /** * sdhci_s3c_get_max_clk - callback to get maximum clock frequency. * @host: The SDHCI host instance. * * Callback to return the maximum clock rate acheivable by the controller. */ static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host) { … } /** * sdhci_s3c_consider_clock - consider one the bus clocks for current setting * @ourhost: Our SDHCI instance. * @src: The source clock index. * @wanted: The clock frequency wanted. */ static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost, unsigned int src, unsigned int wanted) { … } /** * sdhci_s3c_set_clock - callback on clock change * @host: The SDHCI host being changed * @clock: The clock rate being requested. * * When the card's clock is going to be changed, look at the new frequency * and find the best clock source to go with it. */ static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock) { … } /** * sdhci_s3c_get_min_clock - callback to get minimal supported clock value * @host: The SDHCI host being queried * * To init mmc host properly a minimal clock value is needed. For high system * bus clock's values the standard formula gives values out of allowed range. * The clock still can be set to lower values, if clock source other then * system bus is selected. */ static unsigned int sdhci_s3c_get_min_clock(struct sdhci_host *host) { … } /* sdhci_cmu_get_max_clk - callback to get maximum clock frequency.*/ static unsigned int sdhci_cmu_get_max_clock(struct sdhci_host *host) { … } /* sdhci_cmu_get_min_clock - callback to get minimal supported clock value. */ static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host) { … } /* sdhci_cmu_set_clock - callback on clock change.*/ static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock) { … } static const struct sdhci_ops sdhci_s3c_ops_s3c6410 = …; static const struct sdhci_ops sdhci_s3c_ops_exynos4 __maybe_unused = …; #ifdef CONFIG_OF static int sdhci_s3c_parse_dt(struct device *dev, struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) { … } #else static int sdhci_s3c_parse_dt(struct device *dev, struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) { return -EINVAL; } #endif static inline const struct sdhci_s3c_drv_data *sdhci_s3c_get_driver_data( struct platform_device *pdev) { … } static int sdhci_s3c_probe(struct platform_device *pdev) { … } static void sdhci_s3c_remove(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP static int sdhci_s3c_suspend(struct device *dev) { … } static int sdhci_s3c_resume(struct device *dev) { … } #endif #ifdef CONFIG_PM static int sdhci_s3c_runtime_suspend(struct device *dev) { … } static int sdhci_s3c_runtime_resume(struct device *dev) { … } #endif static const struct dev_pm_ops sdhci_s3c_pmops = …; static const struct platform_device_id sdhci_s3c_driver_ids[] = …; MODULE_DEVICE_TABLE(platform, sdhci_s3c_driver_ids); #ifdef CONFIG_OF static const struct sdhci_s3c_drv_data exynos4_sdhci_drv_data = …; static const struct of_device_id sdhci_s3c_dt_match[] = …; MODULE_DEVICE_TABLE(of, sdhci_s3c_dt_match); #endif static struct platform_driver sdhci_s3c_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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