| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * linux/drivers/mmc/host/mmci.h - ARM PrimeCell MMCI PL180/1 driver |
| * |
| * Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved. |
| */ |
| #define MMCIPOWER 0x000 |
| #define MCI_PWR_OFF 0x00 |
| #define MCI_PWR_UP 0x02 |
| #define MCI_PWR_ON 0x03 |
| #define MCI_OD (1 << 6) |
| #define MCI_ROD (1 << 7) |
| /* |
| * The ST Micro version does not have ROD and reuse the voltage registers for |
| * direction settings. |
| */ |
| #define MCI_ST_DATA2DIREN (1 << 2) |
| #define MCI_ST_CMDDIREN (1 << 3) |
| #define MCI_ST_DATA0DIREN (1 << 4) |
| #define MCI_ST_DATA31DIREN (1 << 5) |
| #define MCI_ST_FBCLKEN (1 << 7) |
| #define MCI_ST_DATA74DIREN (1 << 8) |
| /* |
| * The STM32 sdmmc does not have PWR_UP/OD/ROD |
| * and uses the power register for |
| */ |
| #define MCI_STM32_PWR_CYC 0x02 |
| #define MCI_STM32_VSWITCH BIT(2) |
| #define MCI_STM32_VSWITCHEN BIT(3) |
| #define MCI_STM32_DIRPOL BIT(4) |
| |
| #define MMCICLOCK 0x004 |
| #define MCI_CLK_ENABLE (1 << 8) |
| #define MCI_CLK_PWRSAVE (1 << 9) |
| #define MCI_CLK_BYPASS (1 << 10) |
| #define MCI_4BIT_BUS (1 << 11) |
| /* |
| * 8bit wide buses, hardware flow contronl, negative edges and clock inversion |
| * supported in ST Micro U300 and Ux500 versions |
| */ |
| #define MCI_ST_8BIT_BUS (1 << 12) |
| #define MCI_ST_U300_HWFCEN (1 << 13) |
| #define MCI_ST_UX500_NEG_EDGE (1 << 13) |
| #define MCI_ST_UX500_HWFCEN (1 << 14) |
| #define MCI_ST_UX500_CLK_INV (1 << 15) |
| /* Modified PL180 on Versatile Express platform */ |
| #define MCI_ARM_HWFCEN (1 << 12) |
| |
| /* Modified on Qualcomm Integrations */ |
| #define MCI_QCOM_CLK_WIDEBUS_8 (BIT(10) | BIT(11)) |
| #define MCI_QCOM_CLK_FLOWENA BIT(12) |
| #define MCI_QCOM_CLK_INVERTOUT BIT(13) |
| |
| /* select in latch data and command in */ |
| #define MCI_QCOM_CLK_SELECT_IN_FBCLK BIT(15) |
| #define MCI_QCOM_CLK_SELECT_IN_DDR_MODE (BIT(14) | BIT(15)) |
| |
| /* Modified on STM32 sdmmc */ |
| #define MCI_STM32_CLK_CLKDIV_MSK GENMASK(9, 0) |
| #define MCI_STM32_CLK_WIDEBUS_4 BIT(14) |
| #define MCI_STM32_CLK_WIDEBUS_8 BIT(15) |
| #define MCI_STM32_CLK_NEGEDGE BIT(16) |
| #define MCI_STM32_CLK_HWFCEN BIT(17) |
| #define MCI_STM32_CLK_DDR BIT(18) |
| #define MCI_STM32_CLK_BUSSPEED BIT(19) |
| #define MCI_STM32_CLK_SEL_MSK GENMASK(21, 20) |
| #define MCI_STM32_CLK_SELCK (0 << 20) |
| #define MCI_STM32_CLK_SELCKIN (1 << 20) |
| #define MCI_STM32_CLK_SELFBCK (2 << 20) |
| |
| #define MMCIARGUMENT 0x008 |
| |
| /* The command register controls the Command Path State Machine (CPSM) */ |
| #define MMCICOMMAND 0x00c |
| #define MCI_CPSM_RESPONSE BIT(6) |
| #define MCI_CPSM_LONGRSP BIT(7) |
| #define MCI_CPSM_INTERRUPT BIT(8) |
| #define MCI_CPSM_PENDING BIT(9) |
| #define MCI_CPSM_ENABLE BIT(10) |
| /* Command register flag extenstions in the ST Micro versions */ |
| #define MCI_CPSM_ST_SDIO_SUSP BIT(11) |
| #define MCI_CPSM_ST_ENCMD_COMPL BIT(12) |
| #define MCI_CPSM_ST_NIEN BIT(13) |
| #define MCI_CPSM_ST_CE_ATACMD BIT(14) |
| /* Command register flag extensions in the Qualcomm versions */ |
| #define MCI_CPSM_QCOM_PROGENA BIT(11) |
| #define MCI_CPSM_QCOM_DATCMD BIT(12) |
| #define MCI_CPSM_QCOM_MCIABORT BIT(13) |
| #define MCI_CPSM_QCOM_CCSENABLE BIT(14) |
| #define MCI_CPSM_QCOM_CCSDISABLE BIT(15) |
| #define MCI_CPSM_QCOM_AUTO_CMD19 BIT(16) |
| #define MCI_CPSM_QCOM_AUTO_CMD21 BIT(21) |
| /* Command register in STM32 sdmmc versions */ |
| #define MCI_CPSM_STM32_CMDTRANS BIT(6) |
| #define MCI_CPSM_STM32_CMDSTOP BIT(7) |
| #define MCI_CPSM_STM32_WAITRESP_MASK GENMASK(9, 8) |
| #define MCI_CPSM_STM32_NORSP (0 << 8) |
| #define MCI_CPSM_STM32_SRSP_CRC (1 << 8) |
| #define MCI_CPSM_STM32_SRSP (2 << 8) |
| #define MCI_CPSM_STM32_LRSP_CRC (3 << 8) |
| #define MCI_CPSM_STM32_ENABLE BIT(12) |
| |
| #define MMCIRESPCMD 0x010 |
| #define MMCIRESPONSE0 0x014 |
| #define MMCIRESPONSE1 0x018 |
| #define MMCIRESPONSE2 0x01c |
| #define MMCIRESPONSE3 0x020 |
| #define MMCIDATATIMER 0x024 |
| #define MMCIDATALENGTH 0x028 |
| |
| /* The data control register controls the Data Path State Machine (DPSM) */ |
| #define MMCIDATACTRL 0x02c |
| #define MCI_DPSM_ENABLE BIT(0) |
| #define MCI_DPSM_DIRECTION BIT(1) |
| #define MCI_DPSM_MODE BIT(2) |
| #define MCI_DPSM_DMAENABLE BIT(3) |
| #define MCI_DPSM_BLOCKSIZE BIT(4) |
| /* Control register extensions in the ST Micro U300 and Ux500 versions */ |
| #define MCI_DPSM_ST_RWSTART BIT(8) |
| #define MCI_DPSM_ST_RWSTOP BIT(9) |
| #define MCI_DPSM_ST_RWMOD BIT(10) |
| #define MCI_DPSM_ST_SDIOEN BIT(11) |
| /* Control register extensions in the ST Micro Ux500 versions */ |
| #define MCI_DPSM_ST_DMAREQCTL BIT(12) |
| #define MCI_DPSM_ST_DBOOTMODEEN BIT(13) |
| #define MCI_DPSM_ST_BUSYMODE BIT(14) |
| #define MCI_DPSM_ST_DDRMODE BIT(15) |
| /* Control register extensions in the Qualcomm versions */ |
| #define MCI_DPSM_QCOM_DATA_PEND BIT(17) |
| #define MCI_DPSM_QCOM_RX_DATA_PEND BIT(20) |
| /* Control register extensions in STM32 versions */ |
| #define MCI_DPSM_STM32_MODE_BLOCK (0 << 2) |
| #define MCI_DPSM_STM32_MODE_SDIO (1 << 2) |
| #define MCI_DPSM_STM32_MODE_STREAM (2 << 2) |
| #define MCI_DPSM_STM32_MODE_BLOCK_STOP (3 << 2) |
| |
| #define MMCIDATACNT 0x030 |
| #define MMCISTATUS 0x034 |
| #define MCI_CMDCRCFAIL (1 << 0) |
| #define MCI_DATACRCFAIL (1 << 1) |
| #define MCI_CMDTIMEOUT (1 << 2) |
| #define MCI_DATATIMEOUT (1 << 3) |
| #define MCI_TXUNDERRUN (1 << 4) |
| #define MCI_RXOVERRUN (1 << 5) |
| #define MCI_CMDRESPEND (1 << 6) |
| #define MCI_CMDSENT (1 << 7) |
| #define MCI_DATAEND (1 << 8) |
| #define MCI_STARTBITERR (1 << 9) |
| #define MCI_DATABLOCKEND (1 << 10) |
| #define MCI_CMDACTIVE (1 << 11) |
| #define MCI_TXACTIVE (1 << 12) |
| #define MCI_RXACTIVE (1 << 13) |
| #define MCI_TXFIFOHALFEMPTY (1 << 14) |
| #define MCI_RXFIFOHALFFULL (1 << 15) |
| #define MCI_TXFIFOFULL (1 << 16) |
| #define MCI_RXFIFOFULL (1 << 17) |
| #define MCI_TXFIFOEMPTY (1 << 18) |
| #define MCI_RXFIFOEMPTY (1 << 19) |
| #define MCI_TXDATAAVLBL (1 << 20) |
| #define MCI_RXDATAAVLBL (1 << 21) |
| /* Extended status bits for the ST Micro variants */ |
| #define MCI_ST_SDIOIT (1 << 22) |
| #define MCI_ST_CEATAEND (1 << 23) |
| #define MCI_ST_CARDBUSY (1 << 24) |
| /* Extended status bits for the STM32 variants */ |
| #define MCI_STM32_BUSYD0 BIT(20) |
| #define MCI_STM32_BUSYD0END BIT(21) |
| |
| #define MMCICLEAR 0x038 |
| #define MCI_CMDCRCFAILCLR (1 << 0) |
| #define MCI_DATACRCFAILCLR (1 << 1) |
| #define MCI_CMDTIMEOUTCLR (1 << 2) |
| #define MCI_DATATIMEOUTCLR (1 << 3) |
| #define MCI_TXUNDERRUNCLR (1 << 4) |
| #define MCI_RXOVERRUNCLR (1 << 5) |
| #define MCI_CMDRESPENDCLR (1 << 6) |
| #define MCI_CMDSENTCLR (1 << 7) |
| #define MCI_DATAENDCLR (1 << 8) |
| #define MCI_STARTBITERRCLR (1 << 9) |
| #define MCI_DATABLOCKENDCLR (1 << 10) |
| /* Extended status bits for the ST Micro variants */ |
| #define MCI_ST_SDIOITC (1 << 22) |
| #define MCI_ST_CEATAENDC (1 << 23) |
| #define MCI_ST_BUSYENDC (1 << 24) |
| |
| #define MMCIMASK0 0x03c |
| #define MCI_CMDCRCFAILMASK (1 << 0) |
| #define MCI_DATACRCFAILMASK (1 << 1) |
| #define MCI_CMDTIMEOUTMASK (1 << 2) |
| #define MCI_DATATIMEOUTMASK (1 << 3) |
| #define MCI_TXUNDERRUNMASK (1 << 4) |
| #define MCI_RXOVERRUNMASK (1 << 5) |
| #define MCI_CMDRESPENDMASK (1 << 6) |
| #define MCI_CMDSENTMASK (1 << 7) |
| #define MCI_DATAENDMASK (1 << 8) |
| #define MCI_STARTBITERRMASK (1 << 9) |
| #define MCI_DATABLOCKENDMASK (1 << 10) |
| #define MCI_CMDACTIVEMASK (1 << 11) |
| #define MCI_TXACTIVEMASK (1 << 12) |
| #define MCI_RXACTIVEMASK (1 << 13) |
| #define MCI_TXFIFOHALFEMPTYMASK (1 << 14) |
| #define MCI_RXFIFOHALFFULLMASK (1 << 15) |
| #define MCI_TXFIFOFULLMASK (1 << 16) |
| #define MCI_RXFIFOFULLMASK (1 << 17) |
| #define MCI_TXFIFOEMPTYMASK (1 << 18) |
| #define MCI_RXFIFOEMPTYMASK (1 << 19) |
| #define MCI_TXDATAAVLBLMASK (1 << 20) |
| #define MCI_RXDATAAVLBLMASK (1 << 21) |
| /* Extended status bits for the ST Micro variants */ |
| #define MCI_ST_SDIOITMASK (1 << 22) |
| #define MCI_ST_CEATAENDMASK (1 << 23) |
| #define MCI_ST_BUSYENDMASK (1 << 24) |
| /* Extended status bits for the STM32 variants */ |
| #define MCI_STM32_BUSYD0ENDMASK BIT(21) |
| |
| #define MMCIMASK1 0x040 |
| #define MMCIFIFOCNT 0x048 |
| #define MMCIFIFO 0x080 /* to 0x0bc */ |
| |
| /* STM32 sdmmc registers for IDMA (Internal DMA) */ |
| #define MMCI_STM32_IDMACTRLR 0x050 |
| #define MMCI_STM32_IDMAEN BIT(0) |
| #define MMCI_STM32_IDMALLIEN BIT(1) |
| |
| #define MMCI_STM32_IDMABSIZER 0x054 |
| #define MMCI_STM32_IDMABNDT_SHIFT 5 |
| #define MMCI_STM32_IDMABNDT_MASK GENMASK(12, 5) |
| |
| #define MMCI_STM32_IDMABASE0R 0x058 |
| |
| #define MMCI_STM32_IDMALAR 0x64 |
| #define MMCI_STM32_IDMALA_MASK GENMASK(13, 0) |
| #define MMCI_STM32_ABR BIT(29) |
| #define MMCI_STM32_ULS BIT(30) |
| #define MMCI_STM32_ULA BIT(31) |
| |
| #define MMCI_STM32_IDMABAR 0x68 |
| |
| #define MCI_IRQENABLE \ |
| (MCI_CMDCRCFAILMASK | MCI_DATACRCFAILMASK | MCI_CMDTIMEOUTMASK | \ |
| MCI_DATATIMEOUTMASK | MCI_TXUNDERRUNMASK | MCI_RXOVERRUNMASK | \ |
| MCI_CMDRESPENDMASK | MCI_CMDSENTMASK) |
| |
| /* These interrupts are directed to IRQ1 when two IRQ lines are available */ |
| #define MCI_IRQ_PIO_MASK \ |
| (MCI_RXFIFOHALFFULLMASK | MCI_RXDATAAVLBLMASK | \ |
| MCI_TXFIFOHALFEMPTYMASK) |
| |
| #define MCI_IRQ_PIO_STM32_MASK \ |
| (MCI_RXFIFOHALFFULLMASK | MCI_TXFIFOHALFEMPTYMASK) |
| |
| #define NR_SG 128 |
| |
| #define MMCI_PINCTRL_STATE_OPENDRAIN "opendrain" |
| |
| struct clk; |
| struct dma_chan; |
| struct mmci_host; |
| |
| /** |
| * struct variant_data - MMCI variant-specific quirks |
| * @clkreg: default value for MCICLOCK register |
| * @clkreg_enable: enable value for MMCICLOCK register |
| * @clkreg_8bit_bus_enable: enable value for 8 bit bus |
| * @clkreg_neg_edge_enable: enable value for inverted data/cmd output |
| * @cmdreg_cpsm_enable: enable value for CPSM |
| * @cmdreg_lrsp_crc: enable value for long response with crc |
| * @cmdreg_srsp_crc: enable value for short response with crc |
| * @cmdreg_srsp: enable value for short response without crc |
| * @cmdreg_stop: enable value for stop and abort transmission |
| * @datalength_bits: number of bits in the MMCIDATALENGTH register |
| * @fifosize: number of bytes that can be written when MMCI_TXFIFOEMPTY |
| * is asserted (likewise for RX) |
| * @fifohalfsize: number of bytes that can be written when MCI_TXFIFOHALFEMPTY |
| * is asserted (likewise for RX) |
| * @data_cmd_enable: enable value for data commands. |
| * @st_sdio: enable ST specific SDIO logic |
| * @st_clkdiv: true if using a ST-specific clock divider algorithm |
| * @stm32_clkdiv: true if using a STM32-specific clock divider algorithm |
| * @datactrl_mask_ddrmode: ddr mode mask in datactrl register. |
| * @datactrl_mask_sdio: SDIO enable mask in datactrl register |
| * @datactrl_blksz: block size in power of two |
| * @datactrl_first: true if data must be setup before send command |
| * @datacnt_useless: true if you could not use datacnt register to read |
| * remaining data |
| * @pwrreg_powerup: power up value for MMCIPOWER register |
| * @f_max: maximum clk frequency supported by the controller. |
| * @signal_direction: input/out direction of bus signals can be indicated |
| * @pwrreg_clkgate: MMCIPOWER register must be used to gate the clock |
| * @busy_detect: true if the variant supports busy detection on DAT0. |
| * @busy_timeout: true if the variant starts data timer when the DPSM |
| * enter in Wait_R or Busy state. |
| * @busy_dpsm_flag: bitmask enabling busy detection in the DPSM |
| * @busy_detect_flag: bitmask identifying the bit in the MMCISTATUS register |
| * indicating that the card is busy |
| * @busy_detect_mask: bitmask identifying the bit in the MMCIMASK0 to mask for |
| * getting busy end detection interrupts |
| * @pwrreg_nopower: bits in MMCIPOWER don't controls ext. power supply |
| * @explicit_mclk_control: enable explicit mclk control in driver. |
| * @qcom_fifo: enables qcom specific fifo pio read logic. |
| * @qcom_dml: enables qcom specific dma glue for dma transfers. |
| * @reversed_irq_handling: handle data irq before cmd irq. |
| * @mmcimask1: true if variant have a MMCIMASK1 register. |
| * @irq_pio_mask: bitmask used to manage interrupt pio transfert in mmcimask |
| * register |
| * @start_err: bitmask identifying the STARTBITERR bit inside MMCISTATUS |
| * register. |
| * @opendrain: bitmask identifying the OPENDRAIN bit inside MMCIPOWER register |
| * @dma_lli: true if variant has dma link list feature. |
| * @stm32_idmabsize_mask: stm32 sdmmc idma buffer size. |
| */ |
| struct variant_data { |
| unsigned int clkreg; |
| unsigned int clkreg_enable; |
| unsigned int clkreg_8bit_bus_enable; |
| unsigned int clkreg_neg_edge_enable; |
| unsigned int cmdreg_cpsm_enable; |
| unsigned int cmdreg_lrsp_crc; |
| unsigned int cmdreg_srsp_crc; |
| unsigned int cmdreg_srsp; |
| unsigned int cmdreg_stop; |
| unsigned int datalength_bits; |
| unsigned int fifosize; |
| unsigned int fifohalfsize; |
| unsigned int data_cmd_enable; |
| unsigned int datactrl_mask_ddrmode; |
| unsigned int datactrl_mask_sdio; |
| unsigned int datactrl_blocksz; |
| u8 datactrl_first:1; |
| u8 datacnt_useless:1; |
| u8 st_sdio:1; |
| u8 st_clkdiv:1; |
| u8 stm32_clkdiv:1; |
| u32 pwrreg_powerup; |
| u32 f_max; |
| u8 signal_direction:1; |
| u8 pwrreg_clkgate:1; |
| u8 busy_detect:1; |
| u8 busy_timeout:1; |
| u32 busy_dpsm_flag; |
| u32 busy_detect_flag; |
| u32 busy_detect_mask; |
| u8 pwrreg_nopower:1; |
| u8 explicit_mclk_control:1; |
| u8 qcom_fifo:1; |
| u8 qcom_dml:1; |
| u8 reversed_irq_handling:1; |
| u8 mmcimask1:1; |
| unsigned int irq_pio_mask; |
| u32 start_err; |
| u32 opendrain; |
| u8 dma_lli:1; |
| u32 stm32_idmabsize_mask; |
| void (*init)(struct mmci_host *host); |
| }; |
| |
| /* mmci variant callbacks */ |
| struct mmci_host_ops { |
| int (*validate_data)(struct mmci_host *host, struct mmc_data *data); |
| int (*prep_data)(struct mmci_host *host, struct mmc_data *data, |
| bool next); |
| void (*unprep_data)(struct mmci_host *host, struct mmc_data *data, |
| int err); |
| u32 (*get_datactrl_cfg)(struct mmci_host *host); |
| void (*get_next_data)(struct mmci_host *host, struct mmc_data *data); |
| int (*dma_setup)(struct mmci_host *host); |
| void (*dma_release)(struct mmci_host *host); |
| int (*dma_start)(struct mmci_host *host, unsigned int *datactrl); |
| void (*dma_finalize)(struct mmci_host *host, struct mmc_data *data); |
| void (*dma_error)(struct mmci_host *host); |
| void (*set_clkreg)(struct mmci_host *host, unsigned int desired); |
| void (*set_pwrreg)(struct mmci_host *host, unsigned int pwr); |
| bool (*busy_complete)(struct mmci_host *host, u32 status, u32 err_msk); |
| }; |
| |
| struct mmci_host { |
| phys_addr_t phybase; |
| void __iomem *base; |
| struct mmc_request *mrq; |
| struct mmc_command *cmd; |
| struct mmc_command stop_abort; |
| struct mmc_data *data; |
| struct mmc_host *mmc; |
| struct clk *clk; |
| u8 singleirq:1; |
| |
| struct reset_control *rst; |
| |
| spinlock_t lock; |
| |
| unsigned int mclk; |
| /* cached value of requested clk in set_ios */ |
| unsigned int clock_cache; |
| unsigned int cclk; |
| u32 pwr_reg; |
| u32 pwr_reg_add; |
| u32 clk_reg; |
| u32 clk_reg_add; |
| u32 datactrl_reg; |
| u32 busy_status; |
| u32 mask1_reg; |
| u8 vqmmc_enabled:1; |
| struct mmci_platform_data *plat; |
| struct mmci_host_ops *ops; |
| struct variant_data *variant; |
| struct pinctrl *pinctrl; |
| struct pinctrl_state *pins_default; |
| struct pinctrl_state *pins_opendrain; |
| |
| u8 hw_designer; |
| u8 hw_revision:4; |
| |
| struct timer_list timer; |
| unsigned int oldstat; |
| |
| /* pio stuff */ |
| struct sg_mapping_iter sg_miter; |
| unsigned int size; |
| int (*get_rx_fifocnt)(struct mmci_host *h, u32 status, int remain); |
| |
| u8 use_dma:1; |
| u8 dma_in_progress:1; |
| void *dma_priv; |
| |
| s32 next_cookie; |
| }; |
| |
| #define dma_inprogress(host) ((host)->dma_in_progress) |
| |
| void mmci_write_clkreg(struct mmci_host *host, u32 clk); |
| void mmci_write_pwrreg(struct mmci_host *host, u32 pwr); |
| |
| static inline u32 mmci_dctrl_blksz(struct mmci_host *host) |
| { |
| return (ffs(host->data->blksz) - 1) << 4; |
| } |
| |
| #ifdef CONFIG_DMA_ENGINE |
| int mmci_dmae_prep_data(struct mmci_host *host, struct mmc_data *data, |
| bool next); |
| void mmci_dmae_unprep_data(struct mmci_host *host, struct mmc_data *data, |
| int err); |
| void mmci_dmae_get_next_data(struct mmci_host *host, struct mmc_data *data); |
| int mmci_dmae_setup(struct mmci_host *host); |
| void mmci_dmae_release(struct mmci_host *host); |
| int mmci_dmae_start(struct mmci_host *host, unsigned int *datactrl); |
| void mmci_dmae_finalize(struct mmci_host *host, struct mmc_data *data); |
| void mmci_dmae_error(struct mmci_host *host); |
| #endif |
| |
| #ifdef CONFIG_MMC_QCOM_DML |
| void qcom_variant_init(struct mmci_host *host); |
| #else |
| static inline void qcom_variant_init(struct mmci_host *host) {} |
| #endif |
| |
| #ifdef CONFIG_MMC_STM32_SDMMC |
| void sdmmc_variant_init(struct mmci_host *host); |
| #else |
| static inline void sdmmc_variant_init(struct mmci_host *host) {} |
| #endif |
