/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * linux/drivers/mmc/host/sdhci.h - Secure Digital Host Controller Interface driver * * Header file for Host Controller registers and I/O accessors. * * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved. */ #ifndef __SDHCI_HW_H #define __SDHCI_HW_H #include <linux/bits.h> #include <linux/scatterlist.h> #include <linux/compiler.h> #include <linux/types.h> #include <linux/io.h> #include <linux/leds.h> #include <linux/interrupt.h> #include <linux/mmc/host.h> /* * Controller registers */ #define SDHCI_DMA_ADDRESS 0x00 #define SDHCI_ARGUMENT2 SDHCI_DMA_ADDRESS #define SDHCI_32BIT_BLK_CNT SDHCI_DMA_ADDRESS #define SDHCI_BLOCK_SIZE 0x04 #define SDHCI_MAKE_BLKSZ(dma, blksz) (((dma & 0x7) << 12) | (blksz & 0xFFF)) #define SDHCI_BLOCK_COUNT 0x06 #define SDHCI_ARGUMENT 0x08 #define SDHCI_TRANSFER_MODE 0x0C #define SDHCI_TRNS_DMA 0x01 #define SDHCI_TRNS_BLK_CNT_EN 0x02 #define SDHCI_TRNS_AUTO_CMD12 0x04 #define SDHCI_TRNS_AUTO_CMD23 0x08 #define SDHCI_TRNS_AUTO_SEL 0x0C #define SDHCI_TRNS_READ 0x10 #define SDHCI_TRNS_MULTI 0x20 #define SDHCI_COMMAND 0x0E #define SDHCI_CMD_RESP_MASK 0x03 #define SDHCI_CMD_CRC 0x08 #define SDHCI_CMD_INDEX 0x10 #define SDHCI_CMD_DATA 0x20 #define SDHCI_CMD_ABORTCMD 0xC0 #define SDHCI_CMD_RESP_NONE 0x00 #define SDHCI_CMD_RESP_LONG 0x01 #define SDHCI_CMD_RESP_SHORT 0x02 #define SDHCI_CMD_RESP_SHORT_BUSY 0x03 #define SDHCI_MAKE_CMD(c, f) (((c & 0xff) << 8) | (f & 0xff)) #define SDHCI_GET_CMD(c) ((c>>8) & 0x3f) #define SDHCI_RESPONSE 0x10 #define SDHCI_BUFFER 0x20 #define SDHCI_PRESENT_STATE 0x24 #define SDHCI_CMD_INHIBIT 0x00000001 #define SDHCI_DATA_INHIBIT 0x00000002 #define SDHCI_DOING_WRITE 0x00000100 #define SDHCI_DOING_READ 0x00000200 #define SDHCI_SPACE_AVAILABLE 0x00000400 #define SDHCI_DATA_AVAILABLE 0x00000800 #define SDHCI_CARD_PRESENT 0x00010000 #define SDHCI_CARD_PRES_SHIFT 16 #define SDHCI_CD_STABLE 0x00020000 #define SDHCI_CD_LVL 0x00040000 #define SDHCI_CD_LVL_SHIFT 18 #define SDHCI_WRITE_PROTECT 0x00080000 #define SDHCI_DATA_LVL_MASK 0x00F00000 #define SDHCI_DATA_LVL_SHIFT 20 #define SDHCI_DATA_0_LVL_MASK 0x00100000 #define SDHCI_CMD_LVL 0x01000000 #define SDHCI_HOST_CONTROL 0x28 #define SDHCI_CTRL_LED 0x01 #define SDHCI_CTRL_4BITBUS 0x02 #define SDHCI_CTRL_HISPD 0x04 #define SDHCI_CTRL_DMA_MASK 0x18 #define SDHCI_CTRL_SDMA 0x00 #define SDHCI_CTRL_ADMA1 0x08 #define SDHCI_CTRL_ADMA32 0x10 #define SDHCI_CTRL_ADMA64 0x18 #define SDHCI_CTRL_ADMA3 0x18 #define SDHCI_CTRL_8BITBUS 0x20 #define SDHCI_CTRL_CDTEST_INS 0x40 #define SDHCI_CTRL_CDTEST_EN 0x80 #define SDHCI_POWER_CONTROL 0x29 #define SDHCI_POWER_ON 0x01 #define SDHCI_POWER_180 0x0A #define SDHCI_POWER_300 0x0C #define SDHCI_POWER_330 0x0E #define SDHCI_BLOCK_GAP_CONTROL 0x2A #define SDHCI_WAKE_UP_CONTROL 0x2B #define SDHCI_WAKE_ON_INT 0x01 #define SDHCI_WAKE_ON_INSERT 0x02 #define SDHCI_WAKE_ON_REMOVE 0x04 #define SDHCI_CLOCK_CONTROL 0x2C #define SDHCI_DIVIDER_SHIFT 8 #define SDHCI_DIVIDER_HI_SHIFT 6 #define SDHCI_DIV_MASK 0xFF #define SDHCI_DIV_MASK_LEN 8 #define SDHCI_DIV_HI_MASK 0x300 #define SDHCI_PROG_CLOCK_MODE 0x0020 #define SDHCI_CLOCK_CARD_EN 0x0004 #define SDHCI_CLOCK_PLL_EN 0x0008 #define SDHCI_CLOCK_INT_STABLE 0x0002 #define SDHCI_CLOCK_INT_EN 0x0001 #define SDHCI_TIMEOUT_CONTROL 0x2E #define SDHCI_SOFTWARE_RESET 0x2F #define SDHCI_RESET_ALL 0x01 #define SDHCI_RESET_CMD 0x02 #define SDHCI_RESET_DATA 0x04 #define SDHCI_INT_STATUS 0x30 #define SDHCI_INT_ENABLE 0x34 #define SDHCI_SIGNAL_ENABLE 0x38 #define SDHCI_INT_RESPONSE 0x00000001 #define SDHCI_INT_DATA_END 0x00000002 #define SDHCI_INT_BLK_GAP 0x00000004 #define SDHCI_INT_DMA_END 0x00000008 #define SDHCI_INT_SPACE_AVAIL 0x00000010 #define SDHCI_INT_DATA_AVAIL 0x00000020 #define SDHCI_INT_CARD_INSERT 0x00000040 #define SDHCI_INT_CARD_REMOVE 0x00000080 #define SDHCI_INT_CARD_INT 0x00000100 #define SDHCI_INT_RETUNE 0x00001000 #define SDHCI_INT_CQE 0x00004000 #define SDHCI_INT_ERROR 0x00008000 #define SDHCI_INT_TIMEOUT 0x00010000 #define SDHCI_INT_CRC 0x00020000 #define SDHCI_INT_END_BIT 0x00040000 #define SDHCI_INT_INDEX 0x00080000 #define SDHCI_INT_DATA_TIMEOUT 0x00100000 #define SDHCI_INT_DATA_CRC 0x00200000 #define SDHCI_INT_DATA_END_BIT 0x00400000 #define SDHCI_INT_BUS_POWER 0x00800000 #define SDHCI_INT_AUTO_CMD_ERR 0x01000000 #define SDHCI_INT_ADMA_ERROR 0x02000000 #define SDHCI_INT_NORMAL_MASK 0x00007FFF #define SDHCI_INT_ERROR_MASK 0xFFFF8000 #define SDHCI_INT_CMD_MASK (SDHCI_INT_RESPONSE | SDHCI_INT_TIMEOUT | \ SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX | \ SDHCI_INT_AUTO_CMD_ERR) #define SDHCI_INT_DATA_MASK (SDHCI_INT_DATA_END | SDHCI_INT_DMA_END | \ SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL | \ SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_DATA_CRC | \ SDHCI_INT_DATA_END_BIT | SDHCI_INT_ADMA_ERROR | \ SDHCI_INT_BLK_GAP) #define SDHCI_INT_ALL_MASK ((unsigned int)-1) #define SDHCI_CQE_INT_ERR_MASK ( \ SDHCI_INT_ADMA_ERROR | SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT | \ SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX | \ SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT) #define SDHCI_CQE_INT_MASK (SDHCI_CQE_INT_ERR_MASK | SDHCI_INT_CQE) #define SDHCI_AUTO_CMD_STATUS 0x3C #define SDHCI_AUTO_CMD_TIMEOUT 0x00000002 #define SDHCI_AUTO_CMD_CRC 0x00000004 #define SDHCI_AUTO_CMD_END_BIT 0x00000008 #define SDHCI_AUTO_CMD_INDEX 0x00000010 #define SDHCI_HOST_CONTROL2 0x3E #define SDHCI_CTRL_UHS_MASK 0x0007 #define SDHCI_CTRL_UHS_SDR12 0x0000 #define SDHCI_CTRL_UHS_SDR25 0x0001 #define SDHCI_CTRL_UHS_SDR50 0x0002 #define SDHCI_CTRL_UHS_SDR104 0x0003 #define SDHCI_CTRL_UHS_DDR50 0x0004 #define SDHCI_CTRL_HS400 0x0005 /* Non-standard */ #define SDHCI_CTRL_VDD_180 0x0008 #define SDHCI_CTRL_DRV_TYPE_MASK 0x0030 #define SDHCI_CTRL_DRV_TYPE_B 0x0000 #define SDHCI_CTRL_DRV_TYPE_A 0x0010 #define SDHCI_CTRL_DRV_TYPE_C 0x0020 #define SDHCI_CTRL_DRV_TYPE_D 0x0030 #define SDHCI_CTRL_EXEC_TUNING 0x0040 #define SDHCI_CTRL_TUNED_CLK 0x0080 #define SDHCI_CMD23_ENABLE 0x0800 #define SDHCI_CTRL_V4_MODE 0x1000 #define SDHCI_CTRL_64BIT_ADDR 0x2000 #define SDHCI_CTRL_PRESET_VAL_ENABLE 0x8000 #define SDHCI_CAPABILITIES 0x40 #define SDHCI_TIMEOUT_CLK_MASK GENMASK(5, 0) #define SDHCI_TIMEOUT_CLK_UNIT 0x00000080 #define SDHCI_CLOCK_BASE_MASK GENMASK(13, 8) #define SDHCI_CLOCK_V3_BASE_MASK GENMASK(15, 8) #define SDHCI_MAX_BLOCK_MASK 0x00030000 #define SDHCI_MAX_BLOCK_SHIFT 16 #define SDHCI_CAN_DO_8BIT 0x00040000 #define SDHCI_CAN_DO_ADMA2 0x00080000 #define SDHCI_CAN_DO_ADMA1 0x00100000 #define SDHCI_CAN_DO_HISPD 0x00200000 #define SDHCI_CAN_DO_SDMA 0x00400000 #define SDHCI_CAN_DO_SUSPEND 0x00800000 #define SDHCI_CAN_VDD_330 0x01000000 #define SDHCI_CAN_VDD_300 0x02000000 #define SDHCI_CAN_VDD_180 0x04000000 #define SDHCI_CAN_64BIT_V4 0x08000000 #define SDHCI_CAN_64BIT 0x10000000 #define SDHCI_CAPABILITIES_1 0x44 #define SDHCI_SUPPORT_SDR50 0x00000001 #define SDHCI_SUPPORT_SDR104 0x00000002 #define SDHCI_SUPPORT_DDR50 0x00000004 #define SDHCI_DRIVER_TYPE_A 0x00000010 #define SDHCI_DRIVER_TYPE_C 0x00000020 #define SDHCI_DRIVER_TYPE_D 0x00000040 #define SDHCI_RETUNING_TIMER_COUNT_MASK GENMASK(11, 8) #define SDHCI_USE_SDR50_TUNING 0x00002000 #define SDHCI_RETUNING_MODE_MASK GENMASK(15, 14) #define SDHCI_CLOCK_MUL_MASK GENMASK(23, 16) #define SDHCI_CAN_DO_ADMA3 0x08000000 #define SDHCI_SUPPORT_HS400 0x80000000 /* Non-standard */ #define SDHCI_MAX_CURRENT 0x48 #define SDHCI_MAX_CURRENT_LIMIT GENMASK(7, 0) #define SDHCI_MAX_CURRENT_330_MASK GENMASK(7, 0) #define SDHCI_MAX_CURRENT_300_MASK GENMASK(15, 8) #define SDHCI_MAX_CURRENT_180_MASK GENMASK(23, 16) #define SDHCI_MAX_CURRENT_MULTIPLIER 4 /* 4C-4F reserved for more max current */ #define SDHCI_SET_ACMD12_ERROR 0x50 #define SDHCI_SET_INT_ERROR 0x52 #define SDHCI_ADMA_ERROR 0x54 /* 55-57 reserved */ #define SDHCI_ADMA_ADDRESS 0x58 #define SDHCI_ADMA_ADDRESS_HI 0x5C /* 60-FB reserved */ #define SDHCI_PRESET_FOR_SDR12 0x66 #define SDHCI_PRESET_FOR_SDR25 0x68 #define SDHCI_PRESET_FOR_SDR50 0x6A #define SDHCI_PRESET_FOR_SDR104 0x6C #define SDHCI_PRESET_FOR_DDR50 0x6E #define SDHCI_PRESET_FOR_HS400 0x74 /* Non-standard */ #define SDHCI_PRESET_DRV_MASK GENMASK(15, 14) #define SDHCI_PRESET_CLKGEN_SEL BIT(10) #define SDHCI_PRESET_SDCLK_FREQ_MASK GENMASK(9, 0) #define SDHCI_SLOT_INT_STATUS 0xFC #define SDHCI_HOST_VERSION 0xFE #define SDHCI_VENDOR_VER_MASK 0xFF00 #define SDHCI_VENDOR_VER_SHIFT 8 #define SDHCI_SPEC_VER_MASK 0x00FF #define SDHCI_SPEC_VER_SHIFT 0 #define SDHCI_SPEC_100 0 #define SDHCI_SPEC_200 1 #define SDHCI_SPEC_300 2 #define SDHCI_SPEC_400 3 #define SDHCI_SPEC_410 4 #define SDHCI_SPEC_420 5 /* * End of controller registers. */ #define SDHCI_MAX_DIV_SPEC_200 256 #define SDHCI_MAX_DIV_SPEC_300 2046 /* * Host SDMA buffer boundary. Valid values from 4K to 512K in powers of 2. */ #define SDHCI_DEFAULT_BOUNDARY_SIZE (512 * 1024) #define SDHCI_DEFAULT_BOUNDARY_ARG (ilog2(SDHCI_DEFAULT_BOUNDARY_SIZE) - 12) /* ADMA2 32-bit DMA descriptor size */ #define SDHCI_ADMA2_32_DESC_SZ 8 /* ADMA2 32-bit descriptor */ struct sdhci_adma2_32_desc { __le16 cmd; __le16 len; __le32 addr; } __packed __aligned(4); /* ADMA2 data alignment */ #define SDHCI_ADMA2_ALIGN 4 #define SDHCI_ADMA2_MASK (SDHCI_ADMA2_ALIGN - 1) /* * ADMA2 descriptor alignment. Some controllers (e.g. Intel) require 8 byte * alignment for the descriptor table even in 32-bit DMA mode. Memory * allocation is at least 8 byte aligned anyway, so just stipulate 8 always. */ #define SDHCI_ADMA2_DESC_ALIGN 8 /* * ADMA2 64-bit DMA descriptor size * According to SD Host Controller spec v4.10, there are two kinds of * descriptors for 64-bit addressing mode: 96-bit Descriptor and 128-bit * Descriptor, if Host Version 4 Enable is set in the Host Control 2 * register, 128-bit Descriptor will be selected. */ #define SDHCI_ADMA2_64_DESC_SZ(host) ((host)->v4_mode ? 16 : 12) /* * ADMA2 64-bit descriptor. Note 12-byte descriptor can't always be 8-byte * aligned. */ struct sdhci_adma2_64_desc { __le16 cmd; __le16 len; __le32 addr_lo; __le32 addr_hi; } __packed __aligned(4); #define ADMA2_TRAN_VALID 0x21 #define ADMA2_NOP_END_VALID 0x3 #define ADMA2_END 0x2 /* * Maximum segments assuming a 512KiB maximum requisition size and a minimum * 4KiB page size. */ #define SDHCI_MAX_SEGS 128 /* Allow for a a command request and a data request at the same time */ #define SDHCI_MAX_MRQS 2 /* * 48bit command and 136 bit response in 100KHz clock could take upto 2.48ms. * However since the start time of the command, the time between * command and response, and the time between response and start of data is * not known, set the command transfer time to 10ms. */ #define MMC_CMD_TRANSFER_TIME (10 * NSEC_PER_MSEC) /* max 10 ms */ enum sdhci_cookie { COOKIE_UNMAPPED, COOKIE_PRE_MAPPED, /* mapped by sdhci_pre_req() */ COOKIE_MAPPED, /* mapped by sdhci_prepare_data() */ }; struct sdhci_host { /* Data set by hardware interface driver */ const char *hw_name; /* Hardware bus name */ unsigned int quirks; /* Deviations from spec. */ /* Controller doesn't honor resets unless we touch the clock register */ #define SDHCI_QUIRK_CLOCK_BEFORE_RESET (1<<0) /* Controller has bad caps bits, but really supports DMA */ #define SDHCI_QUIRK_FORCE_DMA (1<<1) /* Controller doesn't like to be reset when there is no card inserted. */ #define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<2) /* Controller doesn't like clearing the power reg before a change */ #define SDHCI_QUIRK_SINGLE_POWER_WRITE (1<<3) /* Controller has flaky internal state so reset it on each ios change */ #define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS (1<<4) /* Controller has an unusable DMA engine */ #define SDHCI_QUIRK_BROKEN_DMA (1<<5) /* Controller has an unusable ADMA engine */ #define SDHCI_QUIRK_BROKEN_ADMA (1<<6) /* Controller can only DMA from 32-bit aligned addresses */ #define SDHCI_QUIRK_32BIT_DMA_ADDR (1<<7) /* Controller can only DMA chunk sizes that are a multiple of 32 bits */ #define SDHCI_QUIRK_32BIT_DMA_SIZE (1<<8) /* Controller can only ADMA chunks that are a multiple of 32 bits */ #define SDHCI_QUIRK_32BIT_ADMA_SIZE (1<<9) /* Controller needs to be reset after each request to stay stable */ #define SDHCI_QUIRK_RESET_AFTER_REQUEST (1<<10) /* Controller needs voltage and power writes to happen separately */ #define SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER (1<<11) /* Controller provides an incorrect timeout value for transfers */ #define SDHCI_QUIRK_BROKEN_TIMEOUT_VAL (1<<12) /* Controller has an issue with buffer bits for small transfers */ #define SDHCI_QUIRK_BROKEN_SMALL_PIO (1<<13) /* Controller does not provide transfer-complete interrupt when not busy */ #define SDHCI_QUIRK_NO_BUSY_IRQ (1<<14) /* Controller has unreliable card detection */ #define SDHCI_QUIRK_BROKEN_CARD_DETECTION (1<<15) /* Controller reports inverted write-protect state */ #define SDHCI_QUIRK_INVERTED_WRITE_PROTECT (1<<16) /* Controller has unusable command queue engine */ #define SDHCI_QUIRK_BROKEN_CQE (1<<17) /* Controller does not like fast PIO transfers */ #define SDHCI_QUIRK_PIO_NEEDS_DELAY (1<<18) /* Controller does not have a LED */ #define SDHCI_QUIRK_NO_LED (1<<19) /* Controller has to be forced to use block size of 2048 bytes */ #define SDHCI_QUIRK_FORCE_BLK_SZ_2048 (1<<20) /* Controller cannot do multi-block transfers */ #define SDHCI_QUIRK_NO_MULTIBLOCK (1<<21) /* Controller can only handle 1-bit data transfers */ #define SDHCI_QUIRK_FORCE_1_BIT_DATA (1<<22) /* Controller needs 10ms delay between applying power and clock */ #define SDHCI_QUIRK_DELAY_AFTER_POWER (1<<23) /* Controller uses SDCLK instead of TMCLK for data timeouts */ #define SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK (1<<24) /* Controller reports wrong base clock capability */ #define SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN (1<<25) /* Controller cannot support End Attribute in NOP ADMA descriptor */ #define SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC (1<<26) /* Controller is missing device caps. Use caps provided by host */ #define SDHCI_QUIRK_MISSING_CAPS (1<<27) /* Controller uses Auto CMD12 command to stop the transfer */ #define SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 (1<<28) /* Controller doesn't have HISPD bit field in HI-SPEED SD card */ #define SDHCI_QUIRK_NO_HISPD_BIT (1<<29) /* Controller treats ADMA descriptors with length 0000h incorrectly */ #define SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC (1<<30) /* The read-only detection via SDHCI_PRESENT_STATE register is unstable */ #define SDHCI_QUIRK_UNSTABLE_RO_DETECT (1<<31) unsigned int quirks2; /* More deviations from spec. */ #define SDHCI_QUIRK2_HOST_OFF_CARD_ON (1<<0) #define SDHCI_QUIRK2_HOST_NO_CMD23 (1<<1) /* The system physically doesn't support 1.8v, even if the host does */ #define SDHCI_QUIRK2_NO_1_8_V (1<<2) #define SDHCI_QUIRK2_PRESET_VALUE_BROKEN (1<<3) #define SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON (1<<4) /* Controller has a non-standard host control register */ #define SDHCI_QUIRK2_BROKEN_HOST_CONTROL (1<<5) /* Controller does not support HS200 */ #define SDHCI_QUIRK2_BROKEN_HS200 (1<<6) /* Controller does not support DDR50 */ #define SDHCI_QUIRK2_BROKEN_DDR50 (1<<7) /* Stop command (CMD12) can set Transfer Complete when not using MMC_RSP_BUSY */ #define SDHCI_QUIRK2_STOP_WITH_TC (1<<8) /* Controller does not support 64-bit DMA */ #define SDHCI_QUIRK2_BROKEN_64_BIT_DMA (1<<9) /* need clear transfer mode register before send cmd */ #define SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD (1<<10) /* Capability register bit-63 indicates HS400 support */ #define SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 (1<<11) /* forced tuned clock */ #define SDHCI_QUIRK2_TUNING_WORK_AROUND (1<<12) /* disable the block count for single block transactions */ #define SDHCI_QUIRK2_SUPPORT_SINGLE (1<<13) /* Controller broken with using ACMD23 */ #define SDHCI_QUIRK2_ACMD23_BROKEN (1<<14) /* Broken Clock divider zero in controller */ #define SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN (1<<15) /* Controller has CRC in 136 bit Command Response */ #define SDHCI_QUIRK2_RSP_136_HAS_CRC (1<<16) /* * Disable HW timeout if the requested timeout is more than the maximum * obtainable timeout. */ #define SDHCI_QUIRK2_DISABLE_HW_TIMEOUT (1<<17) /* * 32-bit block count may not support eMMC where upper bits of CMD23 are used * for other purposes. Consequently we support 16-bit block count by default. * Otherwise, SDHCI_QUIRK2_USE_32BIT_BLK_CNT can be selected to use 32-bit * block count. */ #define SDHCI_QUIRK2_USE_32BIT_BLK_CNT (1<<18) int irq; /* Device IRQ */ void __iomem *ioaddr; /* Mapped address */ phys_addr_t mapbase; /* physical address base */ char *bounce_buffer; /* For packing SDMA reads/writes */ dma_addr_t bounce_addr; unsigned int bounce_buffer_size; const struct sdhci_ops *ops; /* Low level hw interface */ /* Internal data */ struct mmc_host *mmc; /* MMC structure */ struct mmc_host_ops mmc_host_ops; /* MMC host ops */ u64 dma_mask; /* custom DMA mask */ #if IS_ENABLED(CONFIG_LEDS_CLASS) struct led_classdev led; /* LED control */ char led_name[32]; #endif spinlock_t lock; /* Mutex */ int flags; /* Host attributes */ #define SDHCI_USE_SDMA (1<<0) /* Host is SDMA capable */ #define SDHCI_USE_ADMA (1<<1) /* Host is ADMA capable */ #define SDHCI_REQ_USE_DMA (1<<2) /* Use DMA for this req. */ #define SDHCI_DEVICE_DEAD (1<<3) /* Device unresponsive */ #define SDHCI_SDR50_NEEDS_TUNING (1<<4) /* SDR50 needs tuning */ #define SDHCI_AUTO_CMD12 (1<<6) /* Auto CMD12 support */ #define SDHCI_AUTO_CMD23 (1<<7) /* Auto CMD23 support */ #define SDHCI_PV_ENABLED (1<<8) /* Preset value enabled */ #define SDHCI_USE_64_BIT_DMA (1<<12) /* Use 64-bit DMA */ #define SDHCI_HS400_TUNING (1<<13) /* Tuning for HS400 */ #define SDHCI_SIGNALING_330 (1<<14) /* Host is capable of 3.3V signaling */ #define SDHCI_SIGNALING_180 (1<<15) /* Host is capable of 1.8V signaling */ #define SDHCI_SIGNALING_120 (1<<16) /* Host is capable of 1.2V signaling */ unsigned int version; /* SDHCI spec. version */ unsigned int max_clk; /* Max possible freq (MHz) */ unsigned int timeout_clk; /* Timeout freq (KHz) */ unsigned int clk_mul; /* Clock Muliplier value */ unsigned int clock; /* Current clock (MHz) */ u8 pwr; /* Current voltage */ bool runtime_suspended; /* Host is runtime suspended */ bool bus_on; /* Bus power prevents runtime suspend */ bool preset_enabled; /* Preset is enabled */ bool pending_reset; /* Cmd/data reset is pending */ bool irq_wake_enabled; /* IRQ wakeup is enabled */ bool v4_mode; /* Host Version 4 Enable */ bool use_external_dma; /* Host selects to use external DMA */ bool always_defer_done; /* Always defer to complete requests */ struct mmc_request *mrqs_done[SDHCI_MAX_MRQS]; /* Requests done */ struct mmc_command *cmd; /* Current command */ struct mmc_command *data_cmd; /* Current data command */ struct mmc_command *deferred_cmd; /* Deferred command */ struct mmc_data *data; /* Current data request */ unsigned int data_early:1; /* Data finished before cmd */ struct sg_mapping_iter sg_miter; /* SG state for PIO */ unsigned int blocks; /* remaining PIO blocks */ int sg_count; /* Mapped sg entries */ void *adma_table; /* ADMA descriptor table */ void *align_buffer; /* Bounce buffer */ size_t adma_table_sz; /* ADMA descriptor table size */ size_t align_buffer_sz; /* Bounce buffer size */ dma_addr_t adma_addr; /* Mapped ADMA descr. table */ dma_addr_t align_addr; /* Mapped bounce buffer */ unsigned int desc_sz; /* ADMA current descriptor size */ unsigned int alloc_desc_sz; /* ADMA descr. max size host supports */ struct workqueue_struct *complete_wq; /* Request completion wq */ struct work_struct complete_work; /* Request completion work */ struct timer_list timer; /* Timer for timeouts */ struct timer_list data_timer; /* Timer for data timeouts */ #if IS_ENABLED(CONFIG_MMC_SDHCI_EXTERNAL_DMA) struct dma_chan *rx_chan; struct dma_chan *tx_chan; #endif u32 caps; /* CAPABILITY_0 */ u32 caps1; /* CAPABILITY_1 */ bool read_caps; /* Capability flags have been read */ unsigned int ocr_avail_sdio; /* OCR bit masks */ unsigned int ocr_avail_sd; unsigned int ocr_avail_mmc; u32 ocr_mask; /* available voltages */ unsigned timing; /* Current timing */ u32 thread_isr; /* cached registers */ u32 ier; bool cqe_on; /* CQE is operating */ u32 cqe_ier; /* CQE interrupt mask */ u32 cqe_err_ier; /* CQE error interrupt mask */ wait_queue_head_t buf_ready_int; /* Waitqueue for Buffer Read Ready interrupt */ unsigned int tuning_done; /* Condition flag set when CMD19 succeeds */ unsigned int tuning_count; /* Timer count for re-tuning */ unsigned int tuning_mode; /* Re-tuning mode supported by host */ unsigned int tuning_err; /* Error code for re-tuning */ #define SDHCI_TUNING_MODE_1 0 #define SDHCI_TUNING_MODE_2 1 #define SDHCI_TUNING_MODE_3 2 /* Delay (ms) between tuning commands */ int tuning_delay; int tuning_loop_count; /* Host SDMA buffer boundary. */ u32 sdma_boundary; /* Host ADMA table count */ u32 adma_table_cnt; u64 data_timeout; unsigned long private[] ____cacheline_aligned; }; struct sdhci_ops { #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS u32 (*read_l)(struct sdhci_host *host, int reg); u16 (*read_w)(struct sdhci_host *host, int reg); u8 (*read_b)(struct sdhci_host *host, int reg); void (*write_l)(struct sdhci_host *host, u32 val, int reg); void (*write_w)(struct sdhci_host *host, u16 val, int reg); void (*write_b)(struct sdhci_host *host, u8 val, int reg); #endif void (*set_clock)(struct sdhci_host *host, unsigned int clock); void (*set_power)(struct sdhci_host *host, unsigned char mode, unsigned short vdd); u32 (*irq)(struct sdhci_host *host, u32 intmask); int (*set_dma_mask)(struct sdhci_host *host); int (*enable_dma)(struct sdhci_host *host); unsigned int (*get_max_clock)(struct sdhci_host *host); unsigned int (*get_min_clock)(struct sdhci_host *host); /* get_timeout_clock should return clk rate in unit of Hz */ unsigned int (*get_timeout_clock)(struct sdhci_host *host); unsigned int (*get_max_timeout_count)(struct sdhci_host *host); void (*set_timeout)(struct sdhci_host *host, struct mmc_command *cmd); void (*set_bus_width)(struct sdhci_host *host, int width); void (*platform_send_init_74_clocks)(struct sdhci_host *host, u8 power_mode); unsigned int (*get_ro)(struct sdhci_host *host); void (*reset)(struct sdhci_host *host, u8 mask); int (*platform_execute_tuning)(struct sdhci_host *host, u32 opcode); void (*set_uhs_signaling)(struct sdhci_host *host, unsigned int uhs); void (*hw_reset)(struct sdhci_host *host); void (*adma_workaround)(struct sdhci_host *host, u32 intmask); void (*card_event)(struct sdhci_host *host); void (*voltage_switch)(struct sdhci_host *host); void (*adma_write_desc)(struct sdhci_host *host, void **desc, dma_addr_t addr, int len, unsigned int cmd); void (*copy_to_bounce_buffer)(struct sdhci_host *host, struct mmc_data *data, unsigned int length); void (*request_done)(struct sdhci_host *host, struct mmc_request *mrq); void (*dump_vendor_regs)(struct sdhci_host *host); }; #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg) { if (unlikely(host->ops->write_l)) host->ops->write_l(host, val, reg); else writel(val, host->ioaddr + reg); } static inline void sdhci_writew(struct sdhci_host *host, u16 val, int reg) { if (unlikely(host->ops->write_w)) host->ops->write_w(host, val, reg); else writew(val, host->ioaddr + reg); } static inline void sdhci_writeb(struct sdhci_host *host, u8 val, int reg) { if (unlikely(host->ops->write_b)) host->ops->write_b(host, val, reg); else writeb(val, host->ioaddr + reg); } static inline u32 sdhci_readl(struct sdhci_host *host, int reg) { if (unlikely(host->ops->read_l)) return host->ops->read_l(host, reg); else return readl(host->ioaddr + reg); } static inline u16 sdhci_readw(struct sdhci_host *host, int reg) { if (unlikely(host->ops->read_w)) return host->ops->read_w(host, reg); else return readw(host->ioaddr + reg); } static inline u8 sdhci_readb(struct sdhci_host *host, int reg) { if (unlikely(host->ops->read_b)) return host->ops->read_b(host, reg); else return readb(host->ioaddr + reg); } #else static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg) { writel(val, host->ioaddr + reg); } static inline void sdhci_writew(struct sdhci_host *host, u16 val, int reg) { writew(val, host->ioaddr + reg); } static inline void sdhci_writeb(struct sdhci_host *host, u8 val, int reg) { writeb(val, host->ioaddr + reg); } static inline u32 sdhci_readl(struct sdhci_host *host, int reg) { return readl(host->ioaddr + reg); } static inline u16 sdhci_readw(struct sdhci_host *host, int reg) { return readw(host->ioaddr + reg); } static inline u8 sdhci_readb(struct sdhci_host *host, int reg) { return readb(host->ioaddr + reg); } #endif /* CONFIG_MMC_SDHCI_IO_ACCESSORS */ struct sdhci_host *sdhci_alloc_host(struct device *dev, size_t priv_size); void sdhci_free_host(struct sdhci_host *host); static inline void *sdhci_priv(struct sdhci_host *host) { return host->private; } void sdhci_card_detect(struct sdhci_host *host); void __sdhci_read_caps(struct sdhci_host *host, const u16 *ver, const u32 *caps, const u32 *caps1); int sdhci_setup_host(struct sdhci_host *host); void sdhci_cleanup_host(struct sdhci_host *host); int __sdhci_add_host(struct sdhci_host *host); int sdhci_add_host(struct sdhci_host *host); void sdhci_remove_host(struct sdhci_host *host, int dead); static inline void sdhci_read_caps(struct sdhci_host *host) { __sdhci_read_caps(host, NULL, NULL, NULL); } u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock, unsigned int *actual_clock); void sdhci_set_clock(struct sdhci_host *host, unsigned int clock); void sdhci_enable_clk(struct sdhci_host *host, u16 clk); void sdhci_set_power(struct sdhci_host *host, unsigned char mode, unsigned short vdd); void sdhci_set_power_and_bus_voltage(struct sdhci_host *host, unsigned char mode, unsigned short vdd); void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, unsigned short vdd); void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq); int sdhci_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq); void sdhci_set_bus_width(struct sdhci_host *host, int width); void sdhci_reset(struct sdhci_host *host, u8 mask); void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing); int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode); void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios); int sdhci_start_signal_voltage_switch(struct mmc_host *mmc, struct mmc_ios *ios); void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable); void sdhci_adma_write_desc(struct sdhci_host *host, void **desc, dma_addr_t addr, int len, unsigned int cmd); #ifdef CONFIG_PM int sdhci_suspend_host(struct sdhci_host *host); int sdhci_resume_host(struct sdhci_host *host); int sdhci_runtime_suspend_host(struct sdhci_host *host); int sdhci_runtime_resume_host(struct sdhci_host *host, int soft_reset); #endif void sdhci_cqe_enable(struct mmc_host *mmc); void sdhci_cqe_disable(struct mmc_host *mmc, bool recovery); bool sdhci_cqe_irq(struct sdhci_host *host, u32 intmask, int *cmd_error, int *data_error); void sdhci_dumpregs(struct sdhci_host *host); void sdhci_enable_v4_mode(struct sdhci_host *host); void sdhci_start_tuning(struct sdhci_host *host); void sdhci_end_tuning(struct sdhci_host *host); void sdhci_reset_tuning(struct sdhci_host *host); void sdhci_send_tuning(struct sdhci_host *host, u32 opcode); void sdhci_abort_tuning(struct sdhci_host *host, u32 opcode); void sdhci_switch_external_dma(struct sdhci_host *host, bool en); void sdhci_set_data_timeout_irq(struct sdhci_host *host, bool enable); void __sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd); #endif /* __SDHCI_HW_H */