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6308d2905b
Add quirk SDHCI_QUIRK2_HOST_OFF_CARD_ON to cater for the case when the card keeps power during suspend but the host controller does not i.e. the card power is not controlled by the host controller. In that case, the controller must be fully reset on resume. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Chris Ball <cjb@laptop.org>
174 lines
7.1 KiB
C
174 lines
7.1 KiB
C
/*
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* linux/include/linux/mmc/sdhci.h - Secure Digital Host Controller Interface
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*
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* Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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#ifndef LINUX_MMC_SDHCI_H
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#define LINUX_MMC_SDHCI_H
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#include <linux/scatterlist.h>
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include <linux/io.h>
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#include <linux/mmc/host.h>
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struct sdhci_host {
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/* Data set by hardware interface driver */
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const char *hw_name; /* Hardware bus name */
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unsigned int quirks; /* Deviations from spec. */
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/* Controller doesn't honor resets unless we touch the clock register */
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#define SDHCI_QUIRK_CLOCK_BEFORE_RESET (1<<0)
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/* Controller has bad caps bits, but really supports DMA */
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#define SDHCI_QUIRK_FORCE_DMA (1<<1)
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/* Controller doesn't like to be reset when there is no card inserted. */
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#define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<2)
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/* Controller doesn't like clearing the power reg before a change */
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#define SDHCI_QUIRK_SINGLE_POWER_WRITE (1<<3)
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/* Controller has flaky internal state so reset it on each ios change */
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#define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS (1<<4)
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/* Controller has an unusable DMA engine */
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#define SDHCI_QUIRK_BROKEN_DMA (1<<5)
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/* Controller has an unusable ADMA engine */
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#define SDHCI_QUIRK_BROKEN_ADMA (1<<6)
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/* Controller can only DMA from 32-bit aligned addresses */
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#define SDHCI_QUIRK_32BIT_DMA_ADDR (1<<7)
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/* Controller can only DMA chunk sizes that are a multiple of 32 bits */
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#define SDHCI_QUIRK_32BIT_DMA_SIZE (1<<8)
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/* Controller can only ADMA chunks that are a multiple of 32 bits */
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#define SDHCI_QUIRK_32BIT_ADMA_SIZE (1<<9)
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/* Controller needs to be reset after each request to stay stable */
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#define SDHCI_QUIRK_RESET_AFTER_REQUEST (1<<10)
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/* Controller needs voltage and power writes to happen separately */
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#define SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER (1<<11)
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/* Controller provides an incorrect timeout value for transfers */
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#define SDHCI_QUIRK_BROKEN_TIMEOUT_VAL (1<<12)
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/* Controller has an issue with buffer bits for small transfers */
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#define SDHCI_QUIRK_BROKEN_SMALL_PIO (1<<13)
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/* Controller does not provide transfer-complete interrupt when not busy */
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#define SDHCI_QUIRK_NO_BUSY_IRQ (1<<14)
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/* Controller has unreliable card detection */
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#define SDHCI_QUIRK_BROKEN_CARD_DETECTION (1<<15)
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/* Controller reports inverted write-protect state */
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#define SDHCI_QUIRK_INVERTED_WRITE_PROTECT (1<<16)
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/* Controller has nonstandard clock management */
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#define SDHCI_QUIRK_NONSTANDARD_CLOCK (1<<17)
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/* Controller does not like fast PIO transfers */
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#define SDHCI_QUIRK_PIO_NEEDS_DELAY (1<<18)
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/* Controller losing signal/interrupt enable states after reset */
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#define SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET (1<<19)
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/* Controller has to be forced to use block size of 2048 bytes */
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#define SDHCI_QUIRK_FORCE_BLK_SZ_2048 (1<<20)
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/* Controller cannot do multi-block transfers */
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#define SDHCI_QUIRK_NO_MULTIBLOCK (1<<21)
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/* Controller can only handle 1-bit data transfers */
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#define SDHCI_QUIRK_FORCE_1_BIT_DATA (1<<22)
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/* Controller needs 10ms delay between applying power and clock */
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#define SDHCI_QUIRK_DELAY_AFTER_POWER (1<<23)
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/* Controller uses SDCLK instead of TMCLK for data timeouts */
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#define SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK (1<<24)
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/* Controller reports wrong base clock capability */
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#define SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN (1<<25)
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/* Controller cannot support End Attribute in NOP ADMA descriptor */
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#define SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC (1<<26)
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/* Controller is missing device caps. Use caps provided by host */
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#define SDHCI_QUIRK_MISSING_CAPS (1<<27)
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/* Controller uses Auto CMD12 command to stop the transfer */
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#define SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 (1<<28)
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/* Controller doesn't have HISPD bit field in HI-SPEED SD card */
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#define SDHCI_QUIRK_NO_HISPD_BIT (1<<29)
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/* Controller treats ADMA descriptors with length 0000h incorrectly */
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#define SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC (1<<30)
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/* The read-only detection via SDHCI_PRESENT_STATE register is unstable */
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#define SDHCI_QUIRK_UNSTABLE_RO_DETECT (1<<31)
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unsigned int quirks2; /* More deviations from spec. */
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#define SDHCI_QUIRK2_HOST_OFF_CARD_ON (1<<0)
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int irq; /* Device IRQ */
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void __iomem *ioaddr; /* Mapped address */
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const struct sdhci_ops *ops; /* Low level hw interface */
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struct regulator *vmmc; /* Power regulator */
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/* Internal data */
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struct mmc_host *mmc; /* MMC structure */
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u64 dma_mask; /* custom DMA mask */
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#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
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struct led_classdev led; /* LED control */
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char led_name[32];
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#endif
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spinlock_t lock; /* Mutex */
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int flags; /* Host attributes */
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#define SDHCI_USE_SDMA (1<<0) /* Host is SDMA capable */
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#define SDHCI_USE_ADMA (1<<1) /* Host is ADMA capable */
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#define SDHCI_REQ_USE_DMA (1<<2) /* Use DMA for this req. */
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#define SDHCI_DEVICE_DEAD (1<<3) /* Device unresponsive */
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#define SDHCI_SDR50_NEEDS_TUNING (1<<4) /* SDR50 needs tuning */
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#define SDHCI_NEEDS_RETUNING (1<<5) /* Host needs retuning */
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#define SDHCI_AUTO_CMD12 (1<<6) /* Auto CMD12 support */
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#define SDHCI_AUTO_CMD23 (1<<7) /* Auto CMD23 support */
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#define SDHCI_PV_ENABLED (1<<8) /* Preset value enabled */
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#define SDHCI_SDIO_IRQ_ENABLED (1<<9) /* SDIO irq enabled */
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#define SDHCI_HS200_NEEDS_TUNING (1<<10) /* HS200 needs tuning */
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unsigned int version; /* SDHCI spec. version */
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unsigned int max_clk; /* Max possible freq (MHz) */
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unsigned int timeout_clk; /* Timeout freq (KHz) */
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unsigned int clk_mul; /* Clock Muliplier value */
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unsigned int clock; /* Current clock (MHz) */
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u8 pwr; /* Current voltage */
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bool runtime_suspended; /* Host is runtime suspended */
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struct mmc_request *mrq; /* Current request */
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struct mmc_command *cmd; /* Current command */
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struct mmc_data *data; /* Current data request */
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unsigned int data_early:1; /* Data finished before cmd */
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struct sg_mapping_iter sg_miter; /* SG state for PIO */
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unsigned int blocks; /* remaining PIO blocks */
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int sg_count; /* Mapped sg entries */
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u8 *adma_desc; /* ADMA descriptor table */
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u8 *align_buffer; /* Bounce buffer */
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dma_addr_t adma_addr; /* Mapped ADMA descr. table */
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dma_addr_t align_addr; /* Mapped bounce buffer */
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struct tasklet_struct card_tasklet; /* Tasklet structures */
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struct tasklet_struct finish_tasklet;
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struct timer_list timer; /* Timer for timeouts */
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unsigned int caps; /* Alternative capabilities */
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unsigned int ocr_avail_sdio; /* OCR bit masks */
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unsigned int ocr_avail_sd;
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unsigned int ocr_avail_mmc;
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wait_queue_head_t buf_ready_int; /* Waitqueue for Buffer Read Ready interrupt */
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unsigned int tuning_done; /* Condition flag set when CMD19 succeeds */
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unsigned int tuning_count; /* Timer count for re-tuning */
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unsigned int tuning_mode; /* Re-tuning mode supported by host */
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#define SDHCI_TUNING_MODE_1 0
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struct timer_list tuning_timer; /* Timer for tuning */
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unsigned long private[0] ____cacheline_aligned;
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};
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#endif /* LINUX_MMC_SDHCI_H */
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