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linux/drivers/mmc/host/mmci.h
Ludovic Barre 94b94a93e3 mmc: mmci_sdmmc: Implement signal voltage callbacks 
To prepare the voltage switch procedure, the VSWITCHEN bit must be set
before sending the CMD11. To confirm completion of voltage switch, the
VSWEND flag must be checked.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Link: https://lore.kernel.org/r/20200128090636.13689-9-ludovic.barre@st.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-03-24 14:35:40 +01:00

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/* 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 MCI_STM32_VSWEND BIT(25)
#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)
/* Extended clear bits for the STM32 variants */
#define MCI_STM32_VSWENDC BIT(25)
#define MCI_STM32_CKSTOPC BIT(26)
#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_blocksz: block size in power of two
* @datactrl_any_blocksz: true if block any block sizes are accepted by
* hardware, such as with some SDIO traffic that send
* odd packets.
* @dma_power_of_2: DMA only works with blocks that are a power of 2.
* @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_any_blocksz:1;
u8 dma_power_of_2:1;
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);
void (*pre_sig_volt_switch)(struct mmci_host *host);
int (*post_sig_volt_switch)(struct mmci_host *host, struct mmc_ios *ios);
};
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 mmc_host_ops *mmc_ops;
struct mmci_host_ops *ops;
struct variant_data *variant;
void *variant_priv;
struct pinctrl *pinctrl;
struct pinctrl_state *pins_opendrain;
u8 hw_designer;
u8 hw_revision:4;
struct timer_list timer;
unsigned int oldstat;
u32 irq_action;
/* 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
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