/* * drivers/mmc/host/omap_hsmmc.c * * Driver for OMAP2430/3430 MMC controller. * * Copyright (C) 2007 Texas Instruments. * * Authors: * Syed Mohammed Khasim <[email protected]> * Madhusudhan <[email protected]> * Mohit Jalori <[email protected]> * * This file is licensed under the terms of the GNU General Public License * version 2. This program is licensed "as is" without any warranty of any * kind, whether express or implied. */ #include <linux/module.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/debugfs.h> #include <linux/dmaengine.h> #include <linux/seq_file.h> #include <linux/sizes.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/dma-mapping.h> #include <linux/platform_device.h> #include <linux/timer.h> #include <linux/clk.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/of_device.h> #include <linux/mmc/host.h> #include <linux/mmc/core.h> #include <linux/mmc/mmc.h> #include <linux/mmc/slot-gpio.h> #include <linux/io.h> #include <linux/irq.h> #include <linux/regulator/consumer.h> #include <linux/pinctrl/consumer.h> #include <linux/pm_runtime.h> #include <linux/pm_wakeirq.h> #include <linux/platform_data/hsmmc-omap.h> /* OMAP HSMMC Host Controller Registers */ #define OMAP_HSMMC_SYSSTATUS … #define OMAP_HSMMC_CON … #define OMAP_HSMMC_SDMASA … #define OMAP_HSMMC_BLK … #define OMAP_HSMMC_ARG … #define OMAP_HSMMC_CMD … #define OMAP_HSMMC_RSP10 … #define OMAP_HSMMC_RSP32 … #define OMAP_HSMMC_RSP54 … #define OMAP_HSMMC_RSP76 … #define OMAP_HSMMC_DATA … #define OMAP_HSMMC_PSTATE … #define OMAP_HSMMC_HCTL … #define OMAP_HSMMC_SYSCTL … #define OMAP_HSMMC_STAT … #define OMAP_HSMMC_IE … #define OMAP_HSMMC_ISE … #define OMAP_HSMMC_AC12 … #define OMAP_HSMMC_CAPA … #define VS18 … #define VS30 … #define HSS … #define SDVS18 … #define SDVS30 … #define SDVS33 … #define SDVS_MASK … #define SDVSCLR … #define SDVSDET … #define AUTOIDLE … #define SDBP … #define DTO … #define ICE … #define ICS … #define CEN … #define CLKD_MAX … #define CLKD_MASK … #define CLKD_SHIFT … #define DTO_MASK … #define DTO_SHIFT … #define INIT_STREAM … #define ACEN_ACMD23 … #define DP_SELECT … #define DDIR … #define DMAE … #define MSBS … #define BCE … #define FOUR_BIT … #define HSPE … #define IWE … #define DDR … #define CLKEXTFREE … #define CTPL … #define DW8 … #define OD … #define STAT_CLEAR … #define INIT_STREAM_CMD … #define DUAL_VOLT_OCR_BIT … #define SRC … #define SRD … #define SOFTRESET … /* PSTATE */ #define DLEV_DAT(x) … /* Interrupt masks for IE and ISE register */ #define CC_EN … #define TC_EN … #define BWR_EN … #define BRR_EN … #define CIRQ_EN … #define ERR_EN … #define CTO_EN … #define CCRC_EN … #define CEB_EN … #define CIE_EN … #define DTO_EN … #define DCRC_EN … #define DEB_EN … #define ACE_EN … #define CERR_EN … #define BADA_EN … #define INT_EN_MASK … #define CNI … #define ACIE … #define ACEB … #define ACCE … #define ACTO … #define ACNE … #define MMC_AUTOSUSPEND_DELAY … #define MMC_TIMEOUT_MS … #define MMC_TIMEOUT_US … #define OMAP_MMC_MIN_CLOCK … #define OMAP_MMC_MAX_CLOCK … #define DRIVER_NAME … /* * One controller can have multiple slots, like on some omap boards using * omap.c controller driver. Luckily this is not currently done on any known * omap_hsmmc.c device. */ #define mmc_pdata(host) … /* * MMC Host controller read/write API's */ #define OMAP_HSMMC_READ(base, reg) … #define OMAP_HSMMC_WRITE(base, reg, val) … struct omap_hsmmc_next { … }; struct omap_hsmmc_host { … }; struct omap_mmc_of_data { … }; static void omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host); static int omap_hsmmc_enable_supply(struct mmc_host *mmc) { … } static int omap_hsmmc_disable_supply(struct mmc_host *mmc) { … } static int omap_hsmmc_set_pbias(struct omap_hsmmc_host *host, bool power_on) { … } static int omap_hsmmc_set_power(struct omap_hsmmc_host *host, int power_on) { … } static int omap_hsmmc_disable_boot_regulator(struct regulator *reg) { … } static int omap_hsmmc_disable_boot_regulators(struct omap_hsmmc_host *host) { … } static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) { … } /* * Start clock to the card */ static void omap_hsmmc_start_clock(struct omap_hsmmc_host *host) { … } /* * Stop clock to the card */ static void omap_hsmmc_stop_clock(struct omap_hsmmc_host *host) { … } static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host, struct mmc_command *cmd) { … } static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host) { … } /* Calculate divisor for the given clock frequency */ static u16 calc_divisor(struct omap_hsmmc_host *host, struct mmc_ios *ios) { … } static void omap_hsmmc_set_clock(struct omap_hsmmc_host *host) { … } static void omap_hsmmc_set_bus_width(struct omap_hsmmc_host *host) { … } static void omap_hsmmc_set_bus_mode(struct omap_hsmmc_host *host) { … } #ifdef CONFIG_PM /* * Restore the MMC host context, if it was lost as result of a * power state change. */ static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host) { … } /* * Save the MMC host context (store the number of power state changes so far). */ static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) { … } #else static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) { } #endif /* * Send init stream sequence to card * before sending IDLE command */ static void send_init_stream(struct omap_hsmmc_host *host) { … } static ssize_t omap_hsmmc_show_slot_name(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR(slot_name, S_IRUGO, omap_hsmmc_show_slot_name, NULL); /* * Configure the response type and send the cmd. */ static void omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd, struct mmc_data *data) { … } static struct dma_chan *omap_hsmmc_get_dma_chan(struct omap_hsmmc_host *host, struct mmc_data *data) { … } static void omap_hsmmc_request_done(struct omap_hsmmc_host *host, struct mmc_request *mrq) { … } /* * Notify the transfer complete to MMC core */ static void omap_hsmmc_xfer_done(struct omap_hsmmc_host *host, struct mmc_data *data) { … } /* * Notify the core about command completion */ static void omap_hsmmc_cmd_done(struct omap_hsmmc_host *host, struct mmc_command *cmd) { … } /* * DMA clean up for command errors */ static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno) { … } /* * Readable error output */ #ifdef CONFIG_MMC_DEBUG static void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, u32 status) { … } #else static inline void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, u32 status) { } #endif /* CONFIG_MMC_DEBUG */ /* * MMC controller internal state machines reset * * Used to reset command or data internal state machines, using respectively * SRC or SRD bit of SYSCTL register * Can be called from interrupt context */ static inline void omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host, unsigned long bit) { … } static void hsmmc_command_incomplete(struct omap_hsmmc_host *host, int err, int end_cmd) { … } static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status) { … } /* * MMC controller IRQ handler */ static irqreturn_t omap_hsmmc_irq(int irq, void *dev_id) { … } static void set_sd_bus_power(struct omap_hsmmc_host *host) { … } /* * Switch MMC interface voltage ... only relevant for MMC1. * * MMC2 and MMC3 use fixed 1.8V levels, and maybe a transceiver. * The MMC2 transceiver controls are used instead of DAT4..DAT7. * Some chips, like eMMC ones, use internal transceivers. */ static int omap_hsmmc_switch_opcond(struct omap_hsmmc_host *host, int vdd) { … } static void omap_hsmmc_dma_callback(void *param) { … } static int omap_hsmmc_pre_dma_transfer(struct omap_hsmmc_host *host, struct mmc_data *data, struct omap_hsmmc_next *next, struct dma_chan *chan) { … } /* * Routine to configure and start DMA for the MMC card */ static int omap_hsmmc_setup_dma_transfer(struct omap_hsmmc_host *host, struct mmc_request *req) { … } static void set_data_timeout(struct omap_hsmmc_host *host, unsigned long long timeout_ns, unsigned int timeout_clks) { … } static void omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host) { … } /* * Configure block length for MMC/SD cards and initiate the transfer. */ static int omap_hsmmc_prepare_data(struct omap_hsmmc_host *host, struct mmc_request *req) { … } static void omap_hsmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq, int err) { … } static void omap_hsmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq) { … } /* * Request function. for read/write operation */ static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req) { … } /* Routine to configure clock values. Exposed API to core */ static void omap_hsmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) { … } static void omap_hsmmc_enable_sdio_irq(struct mmc_host *mmc, int enable) { … } static int omap_hsmmc_configure_wake_irq(struct omap_hsmmc_host *host) { … } static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host) { … } static int omap_hsmmc_multi_io_quirk(struct mmc_card *card, unsigned int direction, int blk_size) { … } static struct mmc_host_ops omap_hsmmc_ops = …; #ifdef CONFIG_DEBUG_FS static int mmc_regs_show(struct seq_file *s, void *data) { … } DEFINE_SHOW_ATTRIBUTE(…); static void omap_hsmmc_debugfs(struct mmc_host *mmc) { … } #else static void omap_hsmmc_debugfs(struct mmc_host *mmc) { } #endif #ifdef CONFIG_OF static const struct omap_mmc_of_data omap3_pre_es3_mmc_of_data = …; static const struct omap_mmc_of_data omap4_mmc_of_data = …; static const struct omap_mmc_of_data am33xx_mmc_of_data = …; static const struct of_device_id omap_mmc_of_match[] = …; MODULE_DEVICE_TABLE(of, omap_mmc_of_match); static struct omap_hsmmc_platform_data *of_get_hsmmc_pdata(struct device *dev) { … } #else static inline struct omap_hsmmc_platform_data *of_get_hsmmc_pdata(struct device *dev) { return ERR_PTR(-EINVAL); } #endif static int omap_hsmmc_probe(struct platform_device *pdev) { … } static void omap_hsmmc_remove(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP static int omap_hsmmc_suspend(struct device *dev) { … } /* Routine to resume the MMC device */ static int omap_hsmmc_resume(struct device *dev) { … } #endif #ifdef CONFIG_PM static int omap_hsmmc_runtime_suspend(struct device *dev) { … } static int omap_hsmmc_runtime_resume(struct device *dev) { … } #endif static const struct dev_pm_ops omap_hsmmc_dev_pm_ops = …; static struct platform_driver omap_hsmmc_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …; MODULE_AUTHOR(…) …;
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