// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2014-2015 MediaTek Inc. * Author: Chaotian.Jing */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define MAX_BD_NUM 1024 /*--------------------------------------------------------------------------*/ /* Common Definition */ /*--------------------------------------------------------------------------*/ #define MSDC_BUS_1BITS 0x0 #define MSDC_BUS_4BITS 0x1 #define MSDC_BUS_8BITS 0x2 #define MSDC_BURST_64B 0x6 /*--------------------------------------------------------------------------*/ /* Register Offset */ /*--------------------------------------------------------------------------*/ #define MSDC_CFG 0x0 #define MSDC_IOCON 0x04 #define MSDC_PS 0x08 #define MSDC_INT 0x0c #define MSDC_INTEN 0x10 #define MSDC_FIFOCS 0x14 #define SDC_CFG 0x30 #define SDC_CMD 0x34 #define SDC_ARG 0x38 #define SDC_STS 0x3c #define SDC_RESP0 0x40 #define SDC_RESP1 0x44 #define SDC_RESP2 0x48 #define SDC_RESP3 0x4c #define SDC_BLK_NUM 0x50 #define SDC_ADV_CFG0 0x64 #define EMMC_IOCON 0x7c #define SDC_ACMD_RESP 0x80 #define DMA_SA_H4BIT 0x8c #define MSDC_DMA_SA 0x90 #define MSDC_DMA_CTRL 0x98 #define MSDC_DMA_CFG 0x9c #define MSDC_PATCH_BIT 0xb0 #define MSDC_PATCH_BIT1 0xb4 #define MSDC_PATCH_BIT2 0xb8 #define MSDC_PAD_TUNE 0xec #define MSDC_PAD_TUNE0 0xf0 #define PAD_DS_TUNE 0x188 #define PAD_CMD_TUNE 0x18c #define EMMC50_CFG0 0x208 #define EMMC50_CFG3 0x220 #define SDC_FIFO_CFG 0x228 /*--------------------------------------------------------------------------*/ /* Top Pad Register Offset */ /*--------------------------------------------------------------------------*/ #define EMMC_TOP_CONTROL 0x00 #define EMMC_TOP_CMD 0x04 #define EMMC50_PAD_DS_TUNE 0x0c /*--------------------------------------------------------------------------*/ /* Register Mask */ /*--------------------------------------------------------------------------*/ /* MSDC_CFG mask */ #define MSDC_CFG_MODE (0x1 << 0) /* RW */ #define MSDC_CFG_CKPDN (0x1 << 1) /* RW */ #define MSDC_CFG_RST (0x1 << 2) /* RW */ #define MSDC_CFG_PIO (0x1 << 3) /* RW */ #define MSDC_CFG_CKDRVEN (0x1 << 4) /* RW */ #define MSDC_CFG_BV18SDT (0x1 << 5) /* RW */ #define MSDC_CFG_BV18PSS (0x1 << 6) /* R */ #define MSDC_CFG_CKSTB (0x1 << 7) /* R */ #define MSDC_CFG_CKDIV (0xff << 8) /* RW */ #define MSDC_CFG_CKMOD (0x3 << 16) /* RW */ #define MSDC_CFG_HS400_CK_MODE (0x1 << 18) /* RW */ #define MSDC_CFG_HS400_CK_MODE_EXTRA (0x1 << 22) /* RW */ #define MSDC_CFG_CKDIV_EXTRA (0xfff << 8) /* RW */ #define MSDC_CFG_CKMOD_EXTRA (0x3 << 20) /* RW */ /* MSDC_IOCON mask */ #define MSDC_IOCON_SDR104CKS (0x1 << 0) /* RW */ #define MSDC_IOCON_RSPL (0x1 << 1) /* RW */ #define MSDC_IOCON_DSPL (0x1 << 2) /* RW */ #define MSDC_IOCON_DDLSEL (0x1 << 3) /* RW */ #define MSDC_IOCON_DDR50CKD (0x1 << 4) /* RW */ #define MSDC_IOCON_DSPLSEL (0x1 << 5) /* RW */ #define MSDC_IOCON_W_DSPL (0x1 << 8) /* RW */ #define MSDC_IOCON_D0SPL (0x1 << 16) /* RW */ #define MSDC_IOCON_D1SPL (0x1 << 17) /* RW */ #define MSDC_IOCON_D2SPL (0x1 << 18) /* RW */ #define MSDC_IOCON_D3SPL (0x1 << 19) /* RW */ #define MSDC_IOCON_D4SPL (0x1 << 20) /* RW */ #define MSDC_IOCON_D5SPL (0x1 << 21) /* RW */ #define MSDC_IOCON_D6SPL (0x1 << 22) /* RW */ #define MSDC_IOCON_D7SPL (0x1 << 23) /* RW */ #define MSDC_IOCON_RISCSZ (0x3 << 24) /* RW */ /* MSDC_PS mask */ #define MSDC_PS_CDEN (0x1 << 0) /* RW */ #define MSDC_PS_CDSTS (0x1 << 1) /* R */ #define MSDC_PS_CDDEBOUNCE (0xf << 12) /* RW */ #define MSDC_PS_DAT (0xff << 16) /* R */ #define MSDC_PS_DATA1 (0x1 << 17) /* R */ #define MSDC_PS_CMD (0x1 << 24) /* R */ #define MSDC_PS_WP (0x1 << 31) /* R */ /* MSDC_INT mask */ #define MSDC_INT_MMCIRQ (0x1 << 0) /* W1C */ #define MSDC_INT_CDSC (0x1 << 1) /* W1C */ #define MSDC_INT_ACMDRDY (0x1 << 3) /* W1C */ #define MSDC_INT_ACMDTMO (0x1 << 4) /* W1C */ #define MSDC_INT_ACMDCRCERR (0x1 << 5) /* W1C */ #define MSDC_INT_DMAQ_EMPTY (0x1 << 6) /* W1C */ #define MSDC_INT_SDIOIRQ (0x1 << 7) /* W1C */ #define MSDC_INT_CMDRDY (0x1 << 8) /* W1C */ #define MSDC_INT_CMDTMO (0x1 << 9) /* W1C */ #define MSDC_INT_RSPCRCERR (0x1 << 10) /* W1C */ #define MSDC_INT_CSTA (0x1 << 11) /* R */ #define MSDC_INT_XFER_COMPL (0x1 << 12) /* W1C */ #define MSDC_INT_DXFER_DONE (0x1 << 13) /* W1C */ #define MSDC_INT_DATTMO (0x1 << 14) /* W1C */ #define MSDC_INT_DATCRCERR (0x1 << 15) /* W1C */ #define MSDC_INT_ACMD19_DONE (0x1 << 16) /* W1C */ #define MSDC_INT_DMA_BDCSERR (0x1 << 17) /* W1C */ #define MSDC_INT_DMA_GPDCSERR (0x1 << 18) /* W1C */ #define MSDC_INT_DMA_PROTECT (0x1 << 19) /* W1C */ /* MSDC_INTEN mask */ #define MSDC_INTEN_MMCIRQ (0x1 << 0) /* RW */ #define MSDC_INTEN_CDSC (0x1 << 1) /* RW */ #define MSDC_INTEN_ACMDRDY (0x1 << 3) /* RW */ #define MSDC_INTEN_ACMDTMO (0x1 << 4) /* RW */ #define MSDC_INTEN_ACMDCRCERR (0x1 << 5) /* RW */ #define MSDC_INTEN_DMAQ_EMPTY (0x1 << 6) /* RW */ #define MSDC_INTEN_SDIOIRQ (0x1 << 7) /* RW */ #define MSDC_INTEN_CMDRDY (0x1 << 8) /* RW */ #define MSDC_INTEN_CMDTMO (0x1 << 9) /* RW */ #define MSDC_INTEN_RSPCRCERR (0x1 << 10) /* RW */ #define MSDC_INTEN_CSTA (0x1 << 11) /* RW */ #define MSDC_INTEN_XFER_COMPL (0x1 << 12) /* RW */ #define MSDC_INTEN_DXFER_DONE (0x1 << 13) /* RW */ #define MSDC_INTEN_DATTMO (0x1 << 14) /* RW */ #define MSDC_INTEN_DATCRCERR (0x1 << 15) /* RW */ #define MSDC_INTEN_ACMD19_DONE (0x1 << 16) /* RW */ #define MSDC_INTEN_DMA_BDCSERR (0x1 << 17) /* RW */ #define MSDC_INTEN_DMA_GPDCSERR (0x1 << 18) /* RW */ #define MSDC_INTEN_DMA_PROTECT (0x1 << 19) /* RW */ /* MSDC_FIFOCS mask */ #define MSDC_FIFOCS_RXCNT (0xff << 0) /* R */ #define MSDC_FIFOCS_TXCNT (0xff << 16) /* R */ #define MSDC_FIFOCS_CLR (0x1 << 31) /* RW */ /* SDC_CFG mask */ #define SDC_CFG_SDIOINTWKUP (0x1 << 0) /* RW */ #define SDC_CFG_INSWKUP (0x1 << 1) /* RW */ #define SDC_CFG_BUSWIDTH (0x3 << 16) /* RW */ #define SDC_CFG_SDIO (0x1 << 19) /* RW */ #define SDC_CFG_SDIOIDE (0x1 << 20) /* RW */ #define SDC_CFG_INTATGAP (0x1 << 21) /* RW */ #define SDC_CFG_DTOC (0xff << 24) /* RW */ /* SDC_STS mask */ #define SDC_STS_SDCBUSY (0x1 << 0) /* RW */ #define SDC_STS_CMDBUSY (0x1 << 1) /* RW */ #define SDC_STS_SWR_COMPL (0x1 << 31) /* RW */ #define SDC_DAT1_IRQ_TRIGGER (0x1 << 19) /* RW */ /* SDC_ADV_CFG0 mask */ #define SDC_RX_ENHANCE_EN (0x1 << 20) /* RW */ /* DMA_SA_H4BIT mask */ #define DMA_ADDR_HIGH_4BIT (0xf << 0) /* RW */ /* MSDC_DMA_CTRL mask */ #define MSDC_DMA_CTRL_START (0x1 << 0) /* W */ #define MSDC_DMA_CTRL_STOP (0x1 << 1) /* W */ #define MSDC_DMA_CTRL_RESUME (0x1 << 2) /* W */ #define MSDC_DMA_CTRL_MODE (0x1 << 8) /* RW */ #define MSDC_DMA_CTRL_LASTBUF (0x1 << 10) /* RW */ #define MSDC_DMA_CTRL_BRUSTSZ (0x7 << 12) /* RW */ /* MSDC_DMA_CFG mask */ #define MSDC_DMA_CFG_STS (0x1 << 0) /* R */ #define MSDC_DMA_CFG_DECSEN (0x1 << 1) /* RW */ #define MSDC_DMA_CFG_AHBHPROT2 (0x2 << 8) /* RW */ #define MSDC_DMA_CFG_ACTIVEEN (0x2 << 12) /* RW */ #define MSDC_DMA_CFG_CS12B16B (0x1 << 16) /* RW */ /* MSDC_PATCH_BIT mask */ #define MSDC_PATCH_BIT_ODDSUPP (0x1 << 1) /* RW */ #define MSDC_INT_DAT_LATCH_CK_SEL (0x7 << 7) #define MSDC_CKGEN_MSDC_DLY_SEL (0x1f << 10) #define MSDC_PATCH_BIT_IODSSEL (0x1 << 16) /* RW */ #define MSDC_PATCH_BIT_IOINTSEL (0x1 << 17) /* RW */ #define MSDC_PATCH_BIT_BUSYDLY (0xf << 18) /* RW */ #define MSDC_PATCH_BIT_WDOD (0xf << 22) /* RW */ #define MSDC_PATCH_BIT_IDRTSEL (0x1 << 26) /* RW */ #define MSDC_PATCH_BIT_CMDFSEL (0x1 << 27) /* RW */ #define MSDC_PATCH_BIT_INTDLSEL (0x1 << 28) /* RW */ #define MSDC_PATCH_BIT_SPCPUSH (0x1 << 29) /* RW */ #define MSDC_PATCH_BIT_DECRCTMO (0x1 << 30) /* RW */ #define MSDC_PATCH_BIT1_CMDTA (0x7 << 3) /* RW */ #define MSDC_PATCH_BIT1_STOP_DLY (0xf << 8) /* RW */ #define MSDC_PATCH_BIT2_CFGRESP (0x1 << 15) /* RW */ #define MSDC_PATCH_BIT2_CFGCRCSTS (0x1 << 28) /* RW */ #define MSDC_PB2_SUPPORT_64G (0x1 << 1) /* RW */ #define MSDC_PB2_RESPWAIT (0x3 << 2) /* RW */ #define MSDC_PB2_RESPSTSENSEL (0x7 << 16) /* RW */ #define MSDC_PB2_CRCSTSENSEL (0x7 << 29) /* RW */ #define MSDC_PAD_TUNE_DATWRDLY (0x1f << 0) /* RW */ #define MSDC_PAD_TUNE_DATRRDLY (0x1f << 8) /* RW */ #define MSDC_PAD_TUNE_CMDRDLY (0x1f << 16) /* RW */ #define MSDC_PAD_TUNE_CMDRRDLY (0x1f << 22) /* RW */ #define MSDC_PAD_TUNE_CLKTDLY (0x1f << 27) /* RW */ #define MSDC_PAD_TUNE_RXDLYSEL (0x1 << 15) /* RW */ #define MSDC_PAD_TUNE_RD_SEL (0x1 << 13) /* RW */ #define MSDC_PAD_TUNE_CMD_SEL (0x1 << 21) /* RW */ #define PAD_DS_TUNE_DLY1 (0x1f << 2) /* RW */ #define PAD_DS_TUNE_DLY2 (0x1f << 7) /* RW */ #define PAD_DS_TUNE_DLY3 (0x1f << 12) /* RW */ #define PAD_CMD_TUNE_RX_DLY3 (0x1f << 1) /* RW */ #define EMMC50_CFG_PADCMD_LATCHCK (0x1 << 0) /* RW */ #define EMMC50_CFG_CRCSTS_EDGE (0x1 << 3) /* RW */ #define EMMC50_CFG_CFCSTS_SEL (0x1 << 4) /* RW */ #define EMMC50_CFG3_OUTS_WR (0x1f << 0) /* RW */ #define SDC_FIFO_CFG_WRVALIDSEL (0x1 << 24) /* RW */ #define SDC_FIFO_CFG_RDVALIDSEL (0x1 << 25) /* RW */ /* EMMC_TOP_CONTROL mask */ #define PAD_RXDLY_SEL (0x1 << 0) /* RW */ #define DELAY_EN (0x1 << 1) /* RW */ #define PAD_DAT_RD_RXDLY2 (0x1f << 2) /* RW */ #define PAD_DAT_RD_RXDLY (0x1f << 7) /* RW */ #define PAD_DAT_RD_RXDLY2_SEL (0x1 << 12) /* RW */ #define PAD_DAT_RD_RXDLY_SEL (0x1 << 13) /* RW */ #define DATA_K_VALUE_SEL (0x1 << 14) /* RW */ #define SDC_RX_ENH_EN (0x1 << 15) /* TW */ /* EMMC_TOP_CMD mask */ #define PAD_CMD_RXDLY2 (0x1f << 0) /* RW */ #define PAD_CMD_RXDLY (0x1f << 5) /* RW */ #define PAD_CMD_RD_RXDLY2_SEL (0x1 << 10) /* RW */ #define PAD_CMD_RD_RXDLY_SEL (0x1 << 11) /* RW */ #define PAD_CMD_TX_DLY (0x1f << 12) /* RW */ #define REQ_CMD_EIO (0x1 << 0) #define REQ_CMD_TMO (0x1 << 1) #define REQ_DAT_ERR (0x1 << 2) #define REQ_STOP_EIO (0x1 << 3) #define REQ_STOP_TMO (0x1 << 4) #define REQ_CMD_BUSY (0x1 << 5) #define MSDC_PREPARE_FLAG (0x1 << 0) #define MSDC_ASYNC_FLAG (0x1 << 1) #define MSDC_MMAP_FLAG (0x1 << 2) #define MTK_MMC_AUTOSUSPEND_DELAY 50 #define CMD_TIMEOUT (HZ/10 * 5) /* 100ms x5 */ #define DAT_TIMEOUT (HZ * 5) /* 1000ms x5 */ #define DEFAULT_DEBOUNCE (8) /* 8 cycles CD debounce */ #define PAD_DELAY_MAX 32 /* PAD delay cells */ /*--------------------------------------------------------------------------*/ /* Descriptor Structure */ /*--------------------------------------------------------------------------*/ struct mt_gpdma_desc { u32 gpd_info; #define GPDMA_DESC_HWO (0x1 << 0) #define GPDMA_DESC_BDP (0x1 << 1) #define GPDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */ #define GPDMA_DESC_INT (0x1 << 16) #define GPDMA_DESC_NEXT_H4 (0xf << 24) #define GPDMA_DESC_PTR_H4 (0xf << 28) u32 next; u32 ptr; u32 gpd_data_len; #define GPDMA_DESC_BUFLEN (0xffff) /* bit0 ~ bit15 */ #define GPDMA_DESC_EXTLEN (0xff << 16) /* bit16 ~ bit23 */ u32 arg; u32 blknum; u32 cmd; }; struct mt_bdma_desc { u32 bd_info; #define BDMA_DESC_EOL (0x1 << 0) #define BDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */ #define BDMA_DESC_BLKPAD (0x1 << 17) #define BDMA_DESC_DWPAD (0x1 << 18) #define BDMA_DESC_NEXT_H4 (0xf << 24) #define BDMA_DESC_PTR_H4 (0xf << 28) u32 next; u32 ptr; u32 bd_data_len; #define BDMA_DESC_BUFLEN (0xffff) /* bit0 ~ bit15 */ #define BDMA_DESC_BUFLEN_EXT (0xffffff) /* bit0 ~ bit23 */ }; struct msdc_dma { struct scatterlist *sg; /* I/O scatter list */ struct mt_gpdma_desc *gpd; /* pointer to gpd array */ struct mt_bdma_desc *bd; /* pointer to bd array */ dma_addr_t gpd_addr; /* the physical address of gpd array */ dma_addr_t bd_addr; /* the physical address of bd array */ }; struct msdc_save_para { u32 msdc_cfg; u32 iocon; u32 sdc_cfg; u32 pad_tune; u32 patch_bit0; u32 patch_bit1; u32 patch_bit2; u32 pad_ds_tune; u32 pad_cmd_tune; u32 emmc50_cfg0; u32 emmc50_cfg3; u32 sdc_fifo_cfg; u32 emmc_top_control; u32 emmc_top_cmd; u32 emmc50_pad_ds_tune; }; struct mtk_mmc_compatible { u8 clk_div_bits; bool recheck_sdio_irq; bool hs400_tune; /* only used for MT8173 */ u32 pad_tune_reg; bool async_fifo; bool data_tune; bool busy_check; bool stop_clk_fix; bool enhance_rx; bool support_64g; bool use_internal_cd; }; struct msdc_tune_para { u32 iocon; u32 pad_tune; u32 pad_cmd_tune; u32 emmc_top_control; u32 emmc_top_cmd; }; struct msdc_delay_phase { u8 maxlen; u8 start; u8 final_phase; }; struct msdc_host { struct device *dev; const struct mtk_mmc_compatible *dev_comp; struct mmc_host *mmc; /* mmc structure */ int cmd_rsp; spinlock_t lock; struct mmc_request *mrq; struct mmc_command *cmd; struct mmc_data *data; int error; void __iomem *base; /* host base address */ void __iomem *top_base; /* host top register base address */ struct msdc_dma dma; /* dma channel */ u64 dma_mask; u32 timeout_ns; /* data timeout ns */ u32 timeout_clks; /* data timeout clks */ struct pinctrl *pinctrl; struct pinctrl_state *pins_default; struct pinctrl_state *pins_uhs; struct delayed_work req_timeout; int irq; /* host interrupt */ struct clk *src_clk; /* msdc source clock */ struct clk *h_clk; /* msdc h_clk */ struct clk *bus_clk; /* bus clock which used to access register */ struct clk *src_clk_cg; /* msdc source clock control gate */ u32 mclk; /* mmc subsystem clock frequency */ u32 src_clk_freq; /* source clock frequency */ unsigned char timing; bool vqmmc_enabled; u32 latch_ck; u32 hs400_ds_delay; u32 hs200_cmd_int_delay; /* cmd internal delay for HS200/SDR104 */ u32 hs400_cmd_int_delay; /* cmd internal delay for HS400 */ bool hs400_cmd_resp_sel_rising; /* cmd response sample selection for HS400 */ bool hs400_mode; /* current eMMC will run at hs400 mode */ bool internal_cd; /* Use internal card-detect logic */ struct msdc_save_para save_para; /* used when gate HCLK */ struct msdc_tune_para def_tune_para; /* default tune setting */ struct msdc_tune_para saved_tune_para; /* tune result of CMD21/CMD19 */ }; static const struct mtk_mmc_compatible mt8135_compat = { .clk_div_bits = 8, .recheck_sdio_irq = false, .hs400_tune = false, .pad_tune_reg = MSDC_PAD_TUNE, .async_fifo = false, .data_tune = false, .busy_check = false, .stop_clk_fix = false, .enhance_rx = false, .support_64g = false, }; static const struct mtk_mmc_compatible mt8173_compat = { .clk_div_bits = 8, .recheck_sdio_irq = true, .hs400_tune = true, .pad_tune_reg = MSDC_PAD_TUNE, .async_fifo = false, .data_tune = false, .busy_check = false, .stop_clk_fix = false, .enhance_rx = false, .support_64g = false, }; static const struct mtk_mmc_compatible mt8183_compat = { .clk_div_bits = 12, .recheck_sdio_irq = false, .hs400_tune = false, .pad_tune_reg = MSDC_PAD_TUNE0, .async_fifo = true, .data_tune = true, .busy_check = true, .stop_clk_fix = true, .enhance_rx = true, .support_64g = true, }; static const struct mtk_mmc_compatible mt2701_compat = { .clk_div_bits = 12, .recheck_sdio_irq = false, .hs400_tune = false, .pad_tune_reg = MSDC_PAD_TUNE0, .async_fifo = true, .data_tune = true, .busy_check = false, .stop_clk_fix = false, .enhance_rx = false, .support_64g = false, }; static const struct mtk_mmc_compatible mt2712_compat = { .clk_div_bits = 12, .recheck_sdio_irq = false, .hs400_tune = false, .pad_tune_reg = MSDC_PAD_TUNE0, .async_fifo = true, .data_tune = true, .busy_check = true, .stop_clk_fix = true, .enhance_rx = true, .support_64g = true, }; static const struct mtk_mmc_compatible mt7622_compat = { .clk_div_bits = 12, .recheck_sdio_irq = false, .hs400_tune = false, .pad_tune_reg = MSDC_PAD_TUNE0, .async_fifo = true, .data_tune = true, .busy_check = true, .stop_clk_fix = true, .enhance_rx = true, .support_64g = false, }; static const struct mtk_mmc_compatible mt8516_compat = { .clk_div_bits = 12, .recheck_sdio_irq = false, .hs400_tune = false, .pad_tune_reg = MSDC_PAD_TUNE0, .async_fifo = true, .data_tune = true, .busy_check = true, .stop_clk_fix = true, }; static const struct mtk_mmc_compatible mt7620_compat = { .clk_div_bits = 8, .recheck_sdio_irq = false, .hs400_tune = false, .pad_tune_reg = MSDC_PAD_TUNE, .async_fifo = false, .data_tune = false, .busy_check = false, .stop_clk_fix = false, .enhance_rx = false, .use_internal_cd = true, }; static const struct of_device_id msdc_of_ids[] = { { .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat}, { .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat}, { .compatible = "mediatek,mt8183-mmc", .data = &mt8183_compat}, { .compatible = "mediatek,mt2701-mmc", .data = &mt2701_compat}, { .compatible = "mediatek,mt2712-mmc", .data = &mt2712_compat}, { .compatible = "mediatek,mt7622-mmc", .data = &mt7622_compat}, { .compatible = "mediatek,mt8516-mmc", .data = &mt8516_compat}, { .compatible = "mediatek,mt7620-mmc", .data = &mt7620_compat}, {} }; MODULE_DEVICE_TABLE(of, msdc_of_ids); static void sdr_set_bits(void __iomem *reg, u32 bs) { u32 val = readl(reg); val |= bs; writel(val, reg); } static void sdr_clr_bits(void __iomem *reg, u32 bs) { u32 val = readl(reg); val &= ~bs; writel(val, reg); } static void sdr_set_field(void __iomem *reg, u32 field, u32 val) { unsigned int tv = readl(reg); tv &= ~field; tv |= ((val) << (ffs((unsigned int)field) - 1)); writel(tv, reg); } static void sdr_get_field(void __iomem *reg, u32 field, u32 *val) { unsigned int tv = readl(reg); *val = ((tv & field) >> (ffs((unsigned int)field) - 1)); } static void msdc_reset_hw(struct msdc_host *host) { u32 val; sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_RST); while (readl(host->base + MSDC_CFG) & MSDC_CFG_RST) cpu_relax(); sdr_set_bits(host->base + MSDC_FIFOCS, MSDC_FIFOCS_CLR); while (readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_CLR) cpu_relax(); val = readl(host->base + MSDC_INT); writel(val, host->base + MSDC_INT); } static void msdc_cmd_next(struct msdc_host *host, struct mmc_request *mrq, struct mmc_command *cmd); static void __msdc_enable_sdio_irq(struct msdc_host *host, int enb); static const u32 cmd_ints_mask = MSDC_INTEN_CMDRDY | MSDC_INTEN_RSPCRCERR | MSDC_INTEN_CMDTMO | MSDC_INTEN_ACMDRDY | MSDC_INTEN_ACMDCRCERR | MSDC_INTEN_ACMDTMO; static const u32 data_ints_mask = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO | MSDC_INTEN_DATCRCERR | MSDC_INTEN_DMA_BDCSERR | MSDC_INTEN_DMA_GPDCSERR | MSDC_INTEN_DMA_PROTECT; static u8 msdc_dma_calcs(u8 *buf, u32 len) { u32 i, sum = 0; for (i = 0; i < len; i++) sum += buf[i]; return 0xff - (u8) sum; } static inline void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma, struct mmc_data *data) { unsigned int j, dma_len; dma_addr_t dma_address; u32 dma_ctrl; struct scatterlist *sg; struct mt_gpdma_desc *gpd; struct mt_bdma_desc *bd; sg = data->sg; gpd = dma->gpd; bd = dma->bd; /* modify gpd */ gpd->gpd_info |= GPDMA_DESC_HWO; gpd->gpd_info |= GPDMA_DESC_BDP; /* need to clear first. use these bits to calc checksum */ gpd->gpd_info &= ~GPDMA_DESC_CHECKSUM; gpd->gpd_info |= msdc_dma_calcs((u8 *) gpd, 16) << 8; /* modify bd */ for_each_sg(data->sg, sg, data->sg_count, j) { dma_address = sg_dma_address(sg); dma_len = sg_dma_len(sg); /* init bd */ bd[j].bd_info &= ~BDMA_DESC_BLKPAD; bd[j].bd_info &= ~BDMA_DESC_DWPAD; bd[j].ptr = lower_32_bits(dma_address); if (host->dev_comp->support_64g) { bd[j].bd_info &= ~BDMA_DESC_PTR_H4; bd[j].bd_info |= (upper_32_bits(dma_address) & 0xf) << 28; } if (host->dev_comp->support_64g) { bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN_EXT; bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN_EXT); } else { bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN; bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN); } if (j == data->sg_count - 1) /* the last bd */ bd[j].bd_info |= BDMA_DESC_EOL; else bd[j].bd_info &= ~BDMA_DESC_EOL; /* checksume need to clear first */ bd[j].bd_info &= ~BDMA_DESC_CHECKSUM; bd[j].bd_info |= msdc_dma_calcs((u8 *)(&bd[j]), 16) << 8; } sdr_set_field(host->base + MSDC_DMA_CFG, MSDC_DMA_CFG_DECSEN, 1); dma_ctrl = readl_relaxed(host->base + MSDC_DMA_CTRL); dma_ctrl &= ~(MSDC_DMA_CTRL_BRUSTSZ | MSDC_DMA_CTRL_MODE); dma_ctrl |= (MSDC_BURST_64B << 12 | 1 << 8); writel_relaxed(dma_ctrl, host->base + MSDC_DMA_CTRL); if (host->dev_comp->support_64g) sdr_set_field(host->base + DMA_SA_H4BIT, DMA_ADDR_HIGH_4BIT, upper_32_bits(dma->gpd_addr) & 0xf); writel(lower_32_bits(dma->gpd_addr), host->base + MSDC_DMA_SA); } static void msdc_prepare_data(struct msdc_host *host, struct mmc_request *mrq) { struct mmc_data *data = mrq->data; if (!(data->host_cookie & MSDC_PREPARE_FLAG)) { data->host_cookie |= MSDC_PREPARE_FLAG; data->sg_count = dma_map_sg(host->dev, data->sg, data->sg_len, mmc_get_dma_dir(data)); } } static void msdc_unprepare_data(struct msdc_host *host, struct mmc_request *mrq) { struct mmc_data *data = mrq->data; if (data->host_cookie & MSDC_ASYNC_FLAG) return; if (data->host_cookie & MSDC_PREPARE_FLAG) { dma_unmap_sg(host->dev, data->sg, data->sg_len, mmc_get_dma_dir(data)); data->host_cookie &= ~MSDC_PREPARE_FLAG; } } /* clock control primitives */ static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks) { u32 timeout, clk_ns; u32 mode = 0; host->timeout_ns = ns; host->timeout_clks = clks; if (host->mmc->actual_clock == 0) { timeout = 0; } else { clk_ns = 1000000000UL / host->mmc->actual_clock; timeout = (ns + clk_ns - 1) / clk_ns + clks; /* in 1048576 sclk cycle unit */ timeout = (timeout + (0x1 << 20) - 1) >> 20; if (host->dev_comp->clk_div_bits == 8) sdr_get_field(host->base + MSDC_CFG, MSDC_CFG_CKMOD, &mode); else sdr_get_field(host->base + MSDC_CFG, MSDC_CFG_CKMOD_EXTRA, &mode); /*DDR mode will double the clk cycles for data timeout */ timeout = mode >= 2 ? timeout * 2 : timeout; timeout = timeout > 1 ? timeout - 1 : 0; timeout = timeout > 255 ? 255 : timeout; } sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, timeout); } static void msdc_gate_clock(struct msdc_host *host) { clk_disable_unprepare(host->src_clk_cg); clk_disable_unprepare(host->src_clk); clk_disable_unprepare(host->bus_clk); clk_disable_unprepare(host->h_clk); } static void msdc_ungate_clock(struct msdc_host *host) { clk_prepare_enable(host->h_clk); clk_prepare_enable(host->bus_clk); clk_prepare_enable(host->src_clk); clk_prepare_enable(host->src_clk_cg); while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB)) cpu_relax(); } static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz) { u32 mode; u32 flags; u32 div; u32 sclk; u32 tune_reg = host->dev_comp->pad_tune_reg; if (!hz) { dev_dbg(host->dev, "set mclk to 0\n"); host->mclk = 0; host->mmc->actual_clock = 0; sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN); return; } flags = readl(host->base + MSDC_INTEN); sdr_clr_bits(host->base + MSDC_INTEN, flags); if (host->dev_comp->clk_div_bits == 8) sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_HS400_CK_MODE); else sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_HS400_CK_MODE_EXTRA); if (timing == MMC_TIMING_UHS_DDR50 || timing == MMC_TIMING_MMC_DDR52 || timing == MMC_TIMING_MMC_HS400) { if (timing == MMC_TIMING_MMC_HS400) mode = 0x3; else mode = 0x2; /* ddr mode and use divisor */ if (hz >= (host->src_clk_freq >> 2)) { div = 0; /* mean div = 1/4 */ sclk = host->src_clk_freq >> 2; /* sclk = clk / 4 */ } else { div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2); sclk = (host->src_clk_freq >> 2) / div; div = (div >> 1); } if (timing == MMC_TIMING_MMC_HS400 && hz >= (host->src_clk_freq >> 1)) { if (host->dev_comp->clk_div_bits == 8) sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_HS400_CK_MODE); else sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_HS400_CK_MODE_EXTRA); sclk = host->src_clk_freq >> 1; div = 0; /* div is ignore when bit18 is set */ } } else if (hz >= host->src_clk_freq) { mode = 0x1; /* no divisor */ div = 0; sclk = host->src_clk_freq; } else { mode = 0x0; /* use divisor */ if (hz >= (host->src_clk_freq >> 1)) { div = 0; /* mean div = 1/2 */ sclk = host->src_clk_freq >> 1; /* sclk = clk / 2 */ } else { div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2); sclk = (host->src_clk_freq >> 2) / div; } } sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN); /* * As src_clk/HCLK use the same bit to gate/ungate, * So if want to only gate src_clk, need gate its parent(mux). */ if (host->src_clk_cg) clk_disable_unprepare(host->src_clk_cg); else clk_disable_unprepare(clk_get_parent(host->src_clk)); if (host->dev_comp->clk_div_bits == 8) sdr_set_field(host->base + MSDC_CFG, MSDC_CFG_CKMOD | MSDC_CFG_CKDIV, (mode << 8) | div); else sdr_set_field(host->base + MSDC_CFG, MSDC_CFG_CKMOD_EXTRA | MSDC_CFG_CKDIV_EXTRA, (mode << 12) | div); if (host->src_clk_cg) clk_prepare_enable(host->src_clk_cg); else clk_prepare_enable(clk_get_parent(host->src_clk)); while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB)) cpu_relax(); sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN); host->mmc->actual_clock = sclk; host->mclk = hz; host->timing = timing; /* need because clk changed. */ msdc_set_timeout(host, host->timeout_ns, host->timeout_clks); sdr_set_bits(host->base + MSDC_INTEN, flags); /* * mmc_select_hs400() will drop to 50Mhz and High speed mode, * tune result of hs200/200Mhz is not suitable for 50Mhz */ if (host->mmc->actual_clock <= 52000000) { writel(host->def_tune_para.iocon, host->base + MSDC_IOCON); if (host->top_base) { writel(host->def_tune_para.emmc_top_control, host->top_base + EMMC_TOP_CONTROL); writel(host->def_tune_para.emmc_top_cmd, host->top_base + EMMC_TOP_CMD); } else { writel(host->def_tune_para.pad_tune, host->base + tune_reg); } } else { writel(host->saved_tune_para.iocon, host->base + MSDC_IOCON); writel(host->saved_tune_para.pad_cmd_tune, host->base + PAD_CMD_TUNE); if (host->top_base) { writel(host->saved_tune_para.emmc_top_control, host->top_base + EMMC_TOP_CONTROL); writel(host->saved_tune_para.emmc_top_cmd, host->top_base + EMMC_TOP_CMD); } else { writel(host->saved_tune_para.pad_tune, host->base + tune_reg); } } if (timing == MMC_TIMING_MMC_HS400 && host->dev_comp->hs400_tune) sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRRDLY, host->hs400_cmd_int_delay); dev_dbg(host->dev, "sclk: %d, timing: %d\n", host->mmc->actual_clock, timing); } static inline u32 msdc_cmd_find_resp(struct msdc_host *host, struct mmc_request *mrq, struct mmc_command *cmd) { u32 resp; switch (mmc_resp_type(cmd)) { /* Actually, R1, R5, R6, R7 are the same */ case MMC_RSP_R1: resp = 0x1; break; case MMC_RSP_R1B: resp = 0x7; break; case MMC_RSP_R2: resp = 0x2; break; case MMC_RSP_R3: resp = 0x3; break; case MMC_RSP_NONE: default: resp = 0x0; break; } return resp; } static inline u32 msdc_cmd_prepare_raw_cmd(struct msdc_host *host, struct mmc_request *mrq, struct mmc_command *cmd) { /* rawcmd : * vol_swt << 30 | auto_cmd << 28 | blklen << 16 | go_irq << 15 | * stop << 14 | rw << 13 | dtype << 11 | rsptyp << 7 | brk << 6 | opcode */ u32 opcode = cmd->opcode; u32 resp = msdc_cmd_find_resp(host, mrq, cmd); u32 rawcmd = (opcode & 0x3f) | ((resp & 0x7) << 7); host->cmd_rsp = resp; if ((opcode == SD_IO_RW_DIRECT && cmd->flags == (unsigned int) -1) || opcode == MMC_STOP_TRANSMISSION) rawcmd |= (0x1 << 14); else if (opcode == SD_SWITCH_VOLTAGE) rawcmd |= (0x1 << 30); else if (opcode == SD_APP_SEND_SCR || opcode == SD_APP_SEND_NUM_WR_BLKS || (opcode == SD_SWITCH && mmc_cmd_type(cmd) == MMC_CMD_ADTC) || (opcode == SD_APP_SD_STATUS && mmc_cmd_type(cmd) == MMC_CMD_ADTC) || (opcode == MMC_SEND_EXT_CSD && mmc_cmd_type(cmd) == MMC_CMD_ADTC)) rawcmd |= (0x1 << 11); if (cmd->data) { struct mmc_data *data = cmd->data; if (mmc_op_multi(opcode)) { if (mmc_card_mmc(host->mmc->card) && mrq->sbc && !(mrq->sbc->arg & 0xFFFF0000)) rawcmd |= 0x2 << 28; /* AutoCMD23 */ } rawcmd |= ((data->blksz & 0xFFF) << 16); if (data->flags & MMC_DATA_WRITE) rawcmd |= (0x1 << 13); if (data->blocks > 1) rawcmd |= (0x2 << 11); else rawcmd |= (0x1 << 11); /* Always use dma mode */ sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_PIO); if (host->timeout_ns != data->timeout_ns || host->timeout_clks != data->timeout_clks) msdc_set_timeout(host, data->timeout_ns, data->timeout_clks); writel(data->blocks, host->base + SDC_BLK_NUM); } return rawcmd; } static void msdc_start_data(struct msdc_host *host, struct mmc_request *mrq, struct mmc_command *cmd, struct mmc_data *data) { bool read; WARN_ON(host->data); host->data = data; read = data->flags & MMC_DATA_READ; mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT); msdc_dma_setup(host, &host->dma, data); sdr_set_bits(host->base + MSDC_INTEN, data_ints_mask); sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_START, 1); dev_dbg(host->dev, "DMA start\n"); dev_dbg(host->dev, "%s: cmd=%d DMA data: %d blocks; read=%d\n", __func__, cmd->opcode, data->blocks, read); } static int msdc_auto_cmd_done(struct msdc_host *host, int events, struct mmc_command *cmd) { u32 *rsp = cmd->resp; rsp[0] = readl(host->base + SDC_ACMD_RESP); if (events & MSDC_INT_ACMDRDY) { cmd->error = 0; } else { msdc_reset_hw(host); if (events & MSDC_INT_ACMDCRCERR) { cmd->error = -EILSEQ; host->error |= REQ_STOP_EIO; } else if (events & MSDC_INT_ACMDTMO) { cmd->error = -ETIMEDOUT; host->error |= REQ_STOP_TMO; } dev_err(host->dev, "%s: AUTO_CMD%d arg=%08X; rsp %08X; cmd_error=%d\n", __func__, cmd->opcode, cmd->arg, rsp[0], cmd->error); } return cmd->error; } /** * msdc_recheck_sdio_irq - recheck whether the SDIO irq is lost * * Host controller may lost interrupt in some special case. * Add SDIO irq recheck mechanism to make sure all interrupts * can be processed immediately * */ static void msdc_recheck_sdio_irq(struct msdc_host *host) { u32 reg_int, reg_inten, reg_ps; if (host->mmc->caps & MMC_CAP_SDIO_IRQ) { reg_inten = readl(host->base + MSDC_INTEN); if (reg_inten & MSDC_INTEN_SDIOIRQ) { reg_int = readl(host->base + MSDC_INT); reg_ps = readl(host->base + MSDC_PS); if (!(reg_int & MSDC_INT_SDIOIRQ || reg_ps & MSDC_PS_DATA1)) { __msdc_enable_sdio_irq(host, 0); sdio_signal_irq(host->mmc); } } } } static void msdc_track_cmd_data(struct msdc_host *host, struct mmc_command *cmd, struct mmc_data *data) { if (host->error) dev_dbg(host->dev, "%s: cmd=%d arg=%08X; host->error=0x%08X\n", __func__, cmd->opcode, cmd->arg, host->error); } static void msdc_request_done(struct msdc_host *host, struct mmc_request *mrq) { unsigned long flags; bool ret; ret = cancel_delayed_work(&host->req_timeout); if (!ret) { /* delay work already running */ return; } spin_lock_irqsave(&host->lock, flags); host->mrq = NULL; spin_unlock_irqrestore(&host->lock, flags); msdc_track_cmd_data(host, mrq->cmd, mrq->data); if (mrq->data) msdc_unprepare_data(host, mrq); if (host->error) msdc_reset_hw(host); mmc_request_done(host->mmc, mrq); if (host->dev_comp->recheck_sdio_irq) msdc_recheck_sdio_irq(host); } /* returns true if command is fully handled; returns false otherwise */ static bool msdc_cmd_done(struct msdc_host *host, int events, struct mmc_request *mrq, struct mmc_command *cmd) { bool done = false; bool sbc_error; unsigned long flags; u32 *rsp = cmd->resp; if (mrq->sbc && cmd == mrq->cmd && (events & (MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR | MSDC_INT_ACMDTMO))) msdc_auto_cmd_done(host, events, mrq->sbc); sbc_error = mrq->sbc && mrq->sbc->error; if (!sbc_error && !(events & (MSDC_INT_CMDRDY | MSDC_INT_RSPCRCERR | MSDC_INT_CMDTMO))) return done; spin_lock_irqsave(&host->lock, flags); done = !host->cmd; host->cmd = NULL; spin_unlock_irqrestore(&host->lock, flags); if (done) return true; sdr_clr_bits(host->base + MSDC_INTEN, cmd_ints_mask); if (cmd->flags & MMC_RSP_PRESENT) { if (cmd->flags & MMC_RSP_136) { rsp[0] = readl(host->base + SDC_RESP3); rsp[1] = readl(host->base + SDC_RESP2); rsp[2] = readl(host->base + SDC_RESP1); rsp[3] = readl(host->base + SDC_RESP0); } else { rsp[0] = readl(host->base + SDC_RESP0); } } if (!sbc_error && !(events & MSDC_INT_CMDRDY)) { if (events & MSDC_INT_CMDTMO || (cmd->opcode != MMC_SEND_TUNING_BLOCK && cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200)) /* * should not clear fifo/interrupt as the tune data * may have alreay come when cmd19/cmd21 gets response * CRC error. */ msdc_reset_hw(host); if (events & MSDC_INT_RSPCRCERR) { cmd->error = -EILSEQ; host->error |= REQ_CMD_EIO; } else if (events & MSDC_INT_CMDTMO) { cmd->error = -ETIMEDOUT; host->error |= REQ_CMD_TMO; } } if (cmd->error) dev_dbg(host->dev, "%s: cmd=%d arg=%08X; rsp %08X; cmd_error=%d\n", __func__, cmd->opcode, cmd->arg, rsp[0], cmd->error); msdc_cmd_next(host, mrq, cmd); return true; } /* It is the core layer's responsibility to ensure card status * is correct before issue a request. but host design do below * checks recommended. */ static inline bool msdc_cmd_is_ready(struct msdc_host *host, struct mmc_request *mrq, struct mmc_command *cmd) { /* The max busy time we can endure is 20ms */ unsigned long tmo = jiffies + msecs_to_jiffies(20); while ((readl(host->base + SDC_STS) & SDC_STS_CMDBUSY) && time_before(jiffies, tmo)) cpu_relax(); if (readl(host->base + SDC_STS) & SDC_STS_CMDBUSY) { dev_err(host->dev, "CMD bus busy detected\n"); host->error |= REQ_CMD_BUSY; msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd); return false; } if (mmc_resp_type(cmd) == MMC_RSP_R1B || cmd->data) { tmo = jiffies + msecs_to_jiffies(20); /* R1B or with data, should check SDCBUSY */ while ((readl(host->base + SDC_STS) & SDC_STS_SDCBUSY) && time_before(jiffies, tmo)) cpu_relax(); if (readl(host->base + SDC_STS) & SDC_STS_SDCBUSY) { dev_err(host->dev, "Controller busy detected\n"); host->error |= REQ_CMD_BUSY; msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd); return false; } } return true; } static void msdc_start_command(struct msdc_host *host, struct mmc_request *mrq, struct mmc_command *cmd) { u32 rawcmd; unsigned long flags; WARN_ON(host->cmd); host->cmd = cmd; mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT); if (!msdc_cmd_is_ready(host, mrq, cmd)) return; if ((readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_TXCNT) >> 16 || readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_RXCNT) { dev_err(host->dev, "TX/RX FIFO non-empty before start of IO. Reset\n"); msdc_reset_hw(host); } cmd->error = 0; rawcmd = msdc_cmd_prepare_raw_cmd(host, mrq, cmd); spin_lock_irqsave(&host->lock, flags); sdr_set_bits(host->base + MSDC_INTEN, cmd_ints_mask); spin_unlock_irqrestore(&host->lock, flags); writel(cmd->arg, host->base + SDC_ARG); writel(rawcmd, host->base + SDC_CMD); } static void msdc_cmd_next(struct msdc_host *host, struct mmc_request *mrq, struct mmc_command *cmd) { if ((cmd->error && !(cmd->error == -EILSEQ && (cmd->opcode == MMC_SEND_TUNING_BLOCK || cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200))) || (mrq->sbc && mrq->sbc->error)) msdc_request_done(host, mrq); else if (cmd == mrq->sbc) msdc_start_command(host, mrq, mrq->cmd); else if (!cmd->data) msdc_request_done(host, mrq); else msdc_start_data(host, mrq, cmd, cmd->data); } static void msdc_ops_request(struct mmc_host *mmc, struct mmc_request *mrq) { struct msdc_host *host = mmc_priv(mmc); host->error = 0; WARN_ON(host->mrq); host->mrq = mrq; if (mrq->data) msdc_prepare_data(host, mrq); /* if SBC is required, we have HW option and SW option. * if HW option is enabled, and SBC does not have "special" flags, * use HW option, otherwise use SW option */ if (mrq->sbc && (!mmc_card_mmc(mmc->card) || (mrq->sbc->arg & 0xFFFF0000))) msdc_start_command(host, mrq, mrq->sbc); else msdc_start_command(host, mrq, mrq->cmd); } static void msdc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq) { struct msdc_host *host = mmc_priv(mmc); struct mmc_data *data = mrq->data; if (!data) return; msdc_prepare_data(host, mrq); data->host_cookie |= MSDC_ASYNC_FLAG; } static void msdc_post_req(struct mmc_host *mmc, struct mmc_request *mrq, int err) { struct msdc_host *host = mmc_priv(mmc); struct mmc_data *data; data = mrq->data; if (!data) return; if (data->host_cookie) { data->host_cookie &= ~MSDC_ASYNC_FLAG; msdc_unprepare_data(host, mrq); } } static void msdc_data_xfer_next(struct msdc_host *host, struct mmc_request *mrq, struct mmc_data *data) { if (mmc_op_multi(mrq->cmd->opcode) && mrq->stop && !mrq->stop->error && !mrq->sbc) msdc_start_command(host, mrq, mrq->stop); else msdc_request_done(host, mrq); } static bool msdc_data_xfer_done(struct msdc_host *host, u32 events, struct mmc_request *mrq, struct mmc_data *data) { struct mmc_command *stop = data->stop; unsigned long flags; bool done; unsigned int check_data = events & (MSDC_INT_XFER_COMPL | MSDC_INT_DATCRCERR | MSDC_INT_DATTMO | MSDC_INT_DMA_BDCSERR | MSDC_INT_DMA_GPDCSERR | MSDC_INT_DMA_PROTECT); spin_lock_irqsave(&host->lock, flags); done = !host->data; if (check_data) host->data = NULL; spin_unlock_irqrestore(&host->lock, flags); if (done) return true; if (check_data || (stop && stop->error)) { dev_dbg(host->dev, "DMA status: 0x%8X\n", readl(host->base + MSDC_DMA_CFG)); sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP, 1); while (readl(host->base + MSDC_DMA_CFG) & MSDC_DMA_CFG_STS) cpu_relax(); sdr_clr_bits(host->base + MSDC_INTEN, data_ints_mask); dev_dbg(host->dev, "DMA stop\n"); if ((events & MSDC_INT_XFER_COMPL) && (!stop || !stop->error)) { data->bytes_xfered = data->blocks * data->blksz; } else { dev_dbg(host->dev, "interrupt events: %x\n", events); msdc_reset_hw(host); host->error |= REQ_DAT_ERR; data->bytes_xfered = 0; if (events & MSDC_INT_DATTMO) data->error = -ETIMEDOUT; else if (events & MSDC_INT_DATCRCERR) data->error = -EILSEQ; dev_dbg(host->dev, "%s: cmd=%d; blocks=%d", __func__, mrq->cmd->opcode, data->blocks); dev_dbg(host->dev, "data_error=%d xfer_size=%d\n", (int)data->error, data->bytes_xfered); } msdc_data_xfer_next(host, mrq, data); done = true; } return done; } static void msdc_set_buswidth(struct msdc_host *host, u32 width) { u32 val = readl(host->base + SDC_CFG); val &= ~SDC_CFG_BUSWIDTH; switch (width) { default: case MMC_BUS_WIDTH_1: val |= (MSDC_BUS_1BITS << 16); break; case MMC_BUS_WIDTH_4: val |= (MSDC_BUS_4BITS << 16); break; case MMC_BUS_WIDTH_8: val |= (MSDC_BUS_8BITS << 16); break; } writel(val, host->base + SDC_CFG); dev_dbg(host->dev, "Bus Width = %d", width); } static int msdc_ops_switch_volt(struct mmc_host *mmc, struct mmc_ios *ios) { struct msdc_host *host = mmc_priv(mmc); int ret; if (!IS_ERR(mmc->supply.vqmmc)) { if (ios->signal_voltage != MMC_SIGNAL_VOLTAGE_330 && ios->signal_voltage != MMC_SIGNAL_VOLTAGE_180) { dev_err(host->dev, "Unsupported signal voltage!\n"); return -EINVAL; } ret = mmc_regulator_set_vqmmc(mmc, ios); if (ret < 0) { dev_dbg(host->dev, "Regulator set error %d (%d)\n", ret, ios->signal_voltage); return ret; } /* Apply different pinctrl settings for different signal voltage */ if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) pinctrl_select_state(host->pinctrl, host->pins_uhs); else pinctrl_select_state(host->pinctrl, host->pins_default); } return 0; } static int msdc_card_busy(struct mmc_host *mmc) { struct msdc_host *host = mmc_priv(mmc); u32 status = readl(host->base + MSDC_PS); /* only check if data0 is low */ return !(status & BIT(16)); } static void msdc_request_timeout(struct work_struct *work) { struct msdc_host *host = container_of(work, struct msdc_host, req_timeout.work); /* simulate HW timeout status */ dev_err(host->dev, "%s: aborting cmd/data/mrq\n", __func__); if (host->mrq) { dev_err(host->dev, "%s: aborting mrq=%p cmd=%d\n", __func__, host->mrq, host->mrq->cmd->opcode); if (host->cmd) { dev_err(host->dev, "%s: aborting cmd=%d\n", __func__, host->cmd->opcode); msdc_cmd_done(host, MSDC_INT_CMDTMO, host->mrq, host->cmd); } else if (host->data) { dev_err(host->dev, "%s: abort data: cmd%d; %d blocks\n", __func__, host->mrq->cmd->opcode, host->data->blocks); msdc_data_xfer_done(host, MSDC_INT_DATTMO, host->mrq, host->data); } } } static void __msdc_enable_sdio_irq(struct msdc_host *host, int enb) { if (enb) { sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ); sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE); if (host->dev_comp->recheck_sdio_irq) msdc_recheck_sdio_irq(host); } else { sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ); sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE); } } static void msdc_enable_sdio_irq(struct mmc_host *mmc, int enb) { unsigned long flags; struct msdc_host *host = mmc_priv(mmc); spin_lock_irqsave(&host->lock, flags); __msdc_enable_sdio_irq(host, enb); spin_unlock_irqrestore(&host->lock, flags); if (enb) pm_runtime_get_noresume(host->dev); else pm_runtime_put_noidle(host->dev); } static irqreturn_t msdc_irq(int irq, void *dev_id) { struct msdc_host *host = (struct msdc_host *) dev_id; while (true) { unsigned long flags; struct mmc_request *mrq; struct mmc_command *cmd; struct mmc_data *data; u32 events, event_mask; spin_lock_irqsave(&host->lock, flags); events = readl(host->base + MSDC_INT); event_mask = readl(host->base + MSDC_INTEN); if ((events & event_mask) & MSDC_INT_SDIOIRQ) __msdc_enable_sdio_irq(host, 0); /* clear interrupts */ writel(events & event_mask, host->base + MSDC_INT); mrq = host->mrq; cmd = host->cmd; data = host->data; spin_unlock_irqrestore(&host->lock, flags); if ((events & event_mask) & MSDC_INT_SDIOIRQ) sdio_signal_irq(host->mmc); if ((events & event_mask) & MSDC_INT_CDSC) { if (host->internal_cd) mmc_detect_change(host->mmc, msecs_to_jiffies(20)); events &= ~MSDC_INT_CDSC; } if (!(events & (event_mask & ~MSDC_INT_SDIOIRQ))) break; if (!mrq) { dev_err(host->dev, "%s: MRQ=NULL; events=%08X; event_mask=%08X\n", __func__, events, event_mask); WARN_ON(1); break; } dev_dbg(host->dev, "%s: events=%08X\n", __func__, events); if (cmd) msdc_cmd_done(host, events, mrq, cmd); else if (data) msdc_data_xfer_done(host, events, mrq, data); } return IRQ_HANDLED; } static void msdc_init_hw(struct msdc_host *host) { u32 val; u32 tune_reg = host->dev_comp->pad_tune_reg; /* Configure to MMC/SD mode, clock free running */ sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_MODE | MSDC_CFG_CKPDN); /* Reset */ msdc_reset_hw(host); /* Disable and clear all interrupts */ writel(0, host->base + MSDC_INTEN); val = readl(host->base + MSDC_INT); writel(val, host->base + MSDC_INT); /* Configure card detection */ if (host->internal_cd) { sdr_set_field(host->base + MSDC_PS, MSDC_PS_CDDEBOUNCE, DEFAULT_DEBOUNCE); sdr_set_bits(host->base + MSDC_PS, MSDC_PS_CDEN); sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC); sdr_set_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP); } else { sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP); sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN); sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC); } if (host->top_base) { writel(0, host->top_base + EMMC_TOP_CONTROL); writel(0, host->top_base + EMMC_TOP_CMD); } else { writel(0, host->base + tune_reg); } writel(0, host->base + MSDC_IOCON); sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DDLSEL, 0); writel(0x403c0046, host->base + MSDC_PATCH_BIT); sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_CKGEN_MSDC_DLY_SEL, 1); writel(0xffff4089, host->base + MSDC_PATCH_BIT1); sdr_set_bits(host->base + EMMC50_CFG0, EMMC50_CFG_CFCSTS_SEL); if (host->dev_comp->stop_clk_fix) { sdr_set_field(host->base + MSDC_PATCH_BIT1, MSDC_PATCH_BIT1_STOP_DLY, 3); sdr_clr_bits(host->base + SDC_FIFO_CFG, SDC_FIFO_CFG_WRVALIDSEL); sdr_clr_bits(host->base + SDC_FIFO_CFG, SDC_FIFO_CFG_RDVALIDSEL); } if (host->dev_comp->busy_check) sdr_clr_bits(host->base + MSDC_PATCH_BIT1, (1 << 7)); if (host->dev_comp->async_fifo) { sdr_set_field(host->base + MSDC_PATCH_BIT2, MSDC_PB2_RESPWAIT, 3); if (host->dev_comp->enhance_rx) { if (host->top_base) sdr_set_bits(host->top_base + EMMC_TOP_CONTROL, SDC_RX_ENH_EN); else sdr_set_bits(host->base + SDC_ADV_CFG0, SDC_RX_ENHANCE_EN); } else { sdr_set_field(host->base + MSDC_PATCH_BIT2, MSDC_PB2_RESPSTSENSEL, 2); sdr_set_field(host->base + MSDC_PATCH_BIT2, MSDC_PB2_CRCSTSENSEL, 2); } /* use async fifo, then no need tune internal delay */ sdr_clr_bits(host->base + MSDC_PATCH_BIT2, MSDC_PATCH_BIT2_CFGRESP); sdr_set_bits(host->base + MSDC_PATCH_BIT2, MSDC_PATCH_BIT2_CFGCRCSTS); } if (host->dev_comp->support_64g) sdr_set_bits(host->base + MSDC_PATCH_BIT2, MSDC_PB2_SUPPORT_64G); if (host->dev_comp->data_tune) { if (host->top_base) { sdr_set_bits(host->top_base + EMMC_TOP_CONTROL, PAD_DAT_RD_RXDLY_SEL); sdr_clr_bits(host->top_base + EMMC_TOP_CONTROL, DATA_K_VALUE_SEL); sdr_set_bits(host->top_base + EMMC_TOP_CMD, PAD_CMD_RD_RXDLY_SEL); } else { sdr_set_bits(host->base + tune_reg, MSDC_PAD_TUNE_RD_SEL | MSDC_PAD_TUNE_CMD_SEL); } } else { /* choose clock tune */ if (host->top_base) sdr_set_bits(host->top_base + EMMC_TOP_CONTROL, PAD_RXDLY_SEL); else sdr_set_bits(host->base + tune_reg, MSDC_PAD_TUNE_RXDLYSEL); } /* Configure to enable SDIO mode. * it's must otherwise sdio cmd5 failed */ sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIO); /* Config SDIO device detect interrupt function */ sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE); sdr_set_bits(host->base + SDC_ADV_CFG0, SDC_DAT1_IRQ_TRIGGER); /* Configure to default data timeout */ sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, 3); host->def_tune_para.iocon = readl(host->base + MSDC_IOCON); host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON); if (host->top_base) { host->def_tune_para.emmc_top_control = readl(host->top_base + EMMC_TOP_CONTROL); host->def_tune_para.emmc_top_cmd = readl(host->top_base + EMMC_TOP_CMD); host->saved_tune_para.emmc_top_control = readl(host->top_base + EMMC_TOP_CONTROL); host->saved_tune_para.emmc_top_cmd = readl(host->top_base + EMMC_TOP_CMD); } else { host->def_tune_para.pad_tune = readl(host->base + tune_reg); host->saved_tune_para.pad_tune = readl(host->base + tune_reg); } dev_dbg(host->dev, "init hardware done!"); } static void msdc_deinit_hw(struct msdc_host *host) { u32 val; if (host->internal_cd) { /* Disabled card-detect */ sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN); sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP); } /* Disable and clear all interrupts */ writel(0, host->base + MSDC_INTEN); val = readl(host->base + MSDC_INT); writel(val, host->base + MSDC_INT); } /* init gpd and bd list in msdc_drv_probe */ static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma) { struct mt_gpdma_desc *gpd = dma->gpd; struct mt_bdma_desc *bd = dma->bd; dma_addr_t dma_addr; int i; memset(gpd, 0, sizeof(struct mt_gpdma_desc) * 2); dma_addr = dma->gpd_addr + sizeof(struct mt_gpdma_desc); gpd->gpd_info = GPDMA_DESC_BDP; /* hwo, cs, bd pointer */ /* gpd->next is must set for desc DMA * That's why must alloc 2 gpd structure. */ gpd->next = lower_32_bits(dma_addr); if (host->dev_comp->support_64g) gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 24; dma_addr = dma->bd_addr; gpd->ptr = lower_32_bits(dma->bd_addr); /* physical address */ if (host->dev_comp->support_64g) gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 28; memset(bd, 0, sizeof(struct mt_bdma_desc) * MAX_BD_NUM); for (i = 0; i < (MAX_BD_NUM - 1); i++) { dma_addr = dma->bd_addr + sizeof(*bd) * (i + 1); bd[i].next = lower_32_bits(dma_addr); if (host->dev_comp->support_64g) bd[i].bd_info |= (upper_32_bits(dma_addr) & 0xf) << 24; } } static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) { struct msdc_host *host = mmc_priv(mmc); int ret; msdc_set_buswidth(host, ios->bus_width); /* Suspend/Resume will do power off/on */ switch (ios->power_mode) { case MMC_POWER_UP: if (!IS_ERR(mmc->supply.vmmc)) { msdc_init_hw(host); ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, ios->vdd); if (ret) { dev_err(host->dev, "Failed to set vmmc power!\n"); return; } } break; case MMC_POWER_ON: if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) { ret = regulator_enable(mmc->supply.vqmmc); if (ret) dev_err(host->dev, "Failed to set vqmmc power!\n"); else host->vqmmc_enabled = true; } break; case MMC_POWER_OFF: if (!IS_ERR(mmc->supply.vmmc)) mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) { regulator_disable(mmc->supply.vqmmc); host->vqmmc_enabled = false; } break; default: break; } if (host->mclk != ios->clock || host->timing != ios->timing) msdc_set_mclk(host, ios->timing, ios->clock); } static u32 test_delay_bit(u32 delay, u32 bit) { bit %= PAD_DELAY_MAX; return delay & (1 << bit); } static int get_delay_len(u32 delay, u32 start_bit) { int i; for (i = 0; i < (PAD_DELAY_MAX - start_bit); i++) { if (test_delay_bit(delay, start_bit + i) == 0) return i; } return PAD_DELAY_MAX - start_bit; } static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u32 delay) { int start = 0, len = 0; int start_final = 0, len_final = 0; u8 final_phase = 0xff; struct msdc_delay_phase delay_phase = { 0, }; if (delay == 0) { dev_err(host->dev, "phase error: [map:%x]\n", delay); delay_phase.final_phase = final_phase; return delay_phase; } while (start < PAD_DELAY_MAX) { len = get_delay_len(delay, start); if (len_final < len) { start_final = start; len_final = len; } start += len ? len : 1; if (len >= 12 && start_final < 4) break; } /* The rule is that to find the smallest delay cell */ if (start_final == 0) final_phase = (start_final + len_final / 3) % PAD_DELAY_MAX; else final_phase = (start_final + len_final / 2) % PAD_DELAY_MAX; dev_info(host->dev, "phase: [map:%x] [maxlen:%d] [final:%d]\n", delay, len_final, final_phase); delay_phase.maxlen = len_final; delay_phase.start = start_final; delay_phase.final_phase = final_phase; return delay_phase; } static inline void msdc_set_cmd_delay(struct msdc_host *host, u32 value) { u32 tune_reg = host->dev_comp->pad_tune_reg; if (host->top_base) sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY, value); else sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY, value); } static inline void msdc_set_data_delay(struct msdc_host *host, u32 value) { u32 tune_reg = host->dev_comp->pad_tune_reg; if (host->top_base) sdr_set_field(host->top_base + EMMC_TOP_CONTROL, PAD_DAT_RD_RXDLY, value); else sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_DATRRDLY, value); } static int msdc_tune_response(struct mmc_host *mmc, u32 opcode) { struct msdc_host *host = mmc_priv(mmc); u32 rise_delay = 0, fall_delay = 0; struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,}; struct msdc_delay_phase internal_delay_phase; u8 final_delay, final_maxlen; u32 internal_delay = 0; u32 tune_reg = host->dev_comp->pad_tune_reg; int cmd_err; int i, j; if (mmc->ios.timing == MMC_TIMING_MMC_HS200 || mmc->ios.timing == MMC_TIMING_UHS_SDR104) sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRRDLY, host->hs200_cmd_int_delay); sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); for (i = 0 ; i < PAD_DELAY_MAX; i++) { msdc_set_cmd_delay(host, i); /* * Using the same parameters, it may sometimes pass the test, * but sometimes it may fail. To make sure the parameters are * more stable, we test each set of parameters 3 times. */ for (j = 0; j < 3; j++) { mmc_send_tuning(mmc, opcode, &cmd_err); if (!cmd_err) { rise_delay |= (1 << i); } else { rise_delay &= ~(1 << i); break; } } } final_rise_delay = get_best_delay(host, rise_delay); /* if rising edge has enough margin, then do not scan falling edge */ if (final_rise_delay.maxlen >= 12 || (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4)) goto skip_fall; sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); for (i = 0; i < PAD_DELAY_MAX; i++) { msdc_set_cmd_delay(host, i); /* * Using the same parameters, it may sometimes pass the test, * but sometimes it may fail. To make sure the parameters are * more stable, we test each set of parameters 3 times. */ for (j = 0; j < 3; j++) { mmc_send_tuning(mmc, opcode, &cmd_err); if (!cmd_err) { fall_delay |= (1 << i); } else { fall_delay &= ~(1 << i); break; } } } final_fall_delay = get_best_delay(host, fall_delay); skip_fall: final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen); if (final_fall_delay.maxlen >= 12 && final_fall_delay.start < 4) final_maxlen = final_fall_delay.maxlen; if (final_maxlen == final_rise_delay.maxlen) { sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); final_delay = final_rise_delay.final_phase; } else { sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); final_delay = final_fall_delay.final_phase; } msdc_set_cmd_delay(host, final_delay); if (host->dev_comp->async_fifo || host->hs200_cmd_int_delay) goto skip_internal; for (i = 0; i < PAD_DELAY_MAX; i++) { sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRRDLY, i); mmc_send_tuning(mmc, opcode, &cmd_err); if (!cmd_err) internal_delay |= (1 << i); } dev_dbg(host->dev, "Final internal delay: 0x%x\n", internal_delay); internal_delay_phase = get_best_delay(host, internal_delay); sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRRDLY, internal_delay_phase.final_phase); skip_internal: dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay); return final_delay == 0xff ? -EIO : 0; } static int hs400_tune_response(struct mmc_host *mmc, u32 opcode) { struct msdc_host *host = mmc_priv(mmc); u32 cmd_delay = 0; struct msdc_delay_phase final_cmd_delay = { 0,}; u8 final_delay; int cmd_err; int i, j; /* select EMMC50 PAD CMD tune */ sdr_set_bits(host->base + PAD_CMD_TUNE, BIT(0)); sdr_set_field(host->base + MSDC_PATCH_BIT1, MSDC_PATCH_BIT1_CMDTA, 2); if (mmc->ios.timing == MMC_TIMING_MMC_HS200 || mmc->ios.timing == MMC_TIMING_UHS_SDR104) sdr_set_field(host->base + MSDC_PAD_TUNE, MSDC_PAD_TUNE_CMDRRDLY, host->hs200_cmd_int_delay); if (host->hs400_cmd_resp_sel_rising) sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); else sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); for (i = 0 ; i < PAD_DELAY_MAX; i++) { sdr_set_field(host->base + PAD_CMD_TUNE, PAD_CMD_TUNE_RX_DLY3, i); /* * Using the same parameters, it may sometimes pass the test, * but sometimes it may fail. To make sure the parameters are * more stable, we test each set of parameters 3 times. */ for (j = 0; j < 3; j++) { mmc_send_tuning(mmc, opcode, &cmd_err); if (!cmd_err) { cmd_delay |= (1 << i); } else { cmd_delay &= ~(1 << i); break; } } } final_cmd_delay = get_best_delay(host, cmd_delay); sdr_set_field(host->base + PAD_CMD_TUNE, PAD_CMD_TUNE_RX_DLY3, final_cmd_delay.final_phase); final_delay = final_cmd_delay.final_phase; dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay); return final_delay == 0xff ? -EIO : 0; } static int msdc_tune_data(struct mmc_host *mmc, u32 opcode) { struct msdc_host *host = mmc_priv(mmc); u32 rise_delay = 0, fall_delay = 0; struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,}; u8 final_delay, final_maxlen; int i, ret; sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL, host->latch_ck); sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); for (i = 0 ; i < PAD_DELAY_MAX; i++) { msdc_set_data_delay(host, i); ret = mmc_send_tuning(mmc, opcode, NULL); if (!ret) rise_delay |= (1 << i); } final_rise_delay = get_best_delay(host, rise_delay); /* if rising edge has enough margin, then do not scan falling edge */ if (final_rise_delay.maxlen >= 12 || (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4)) goto skip_fall; sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); for (i = 0; i < PAD_DELAY_MAX; i++) { msdc_set_data_delay(host, i); ret = mmc_send_tuning(mmc, opcode, NULL); if (!ret) fall_delay |= (1 << i); } final_fall_delay = get_best_delay(host, fall_delay); skip_fall: final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen); if (final_maxlen == final_rise_delay.maxlen) { sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); final_delay = final_rise_delay.final_phase; } else { sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); final_delay = final_fall_delay.final_phase; } msdc_set_data_delay(host, final_delay); dev_dbg(host->dev, "Final data pad delay: %x\n", final_delay); return final_delay == 0xff ? -EIO : 0; } /* * MSDC IP which supports data tune + async fifo can do CMD/DAT tune * together, which can save the tuning time. */ static int msdc_tune_together(struct mmc_host *mmc, u32 opcode) { struct msdc_host *host = mmc_priv(mmc); u32 rise_delay = 0, fall_delay = 0; struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,}; u8 final_delay, final_maxlen; int i, ret; sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL, host->latch_ck); sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL); for (i = 0 ; i < PAD_DELAY_MAX; i++) { msdc_set_cmd_delay(host, i); msdc_set_data_delay(host, i); ret = mmc_send_tuning(mmc, opcode, NULL); if (!ret) rise_delay |= (1 << i); } final_rise_delay = get_best_delay(host, rise_delay); /* if rising edge has enough margin, then do not scan falling edge */ if (final_rise_delay.maxlen >= 12 || (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4)) goto skip_fall; sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL); for (i = 0; i < PAD_DELAY_MAX; i++) { msdc_set_cmd_delay(host, i); msdc_set_data_delay(host, i); ret = mmc_send_tuning(mmc, opcode, NULL); if (!ret) fall_delay |= (1 << i); } final_fall_delay = get_best_delay(host, fall_delay); skip_fall: final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen); if (final_maxlen == final_rise_delay.maxlen) { sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL); final_delay = final_rise_delay.final_phase; } else { sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL); sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL); final_delay = final_fall_delay.final_phase; } msdc_set_cmd_delay(host, final_delay); msdc_set_data_delay(host, final_delay); dev_dbg(host->dev, "Final pad delay: %x\n", final_delay); return final_delay == 0xff ? -EIO : 0; } static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode) { struct msdc_host *host = mmc_priv(mmc); int ret; u32 tune_reg = host->dev_comp->pad_tune_reg; if (host->dev_comp->data_tune && host->dev_comp->async_fifo) { ret = msdc_tune_together(mmc, opcode); if (host->hs400_mode) { sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL); msdc_set_data_delay(host, 0); } goto tune_done; } if (host->hs400_mode && host->dev_comp->hs400_tune) ret = hs400_tune_response(mmc, opcode); else ret = msdc_tune_response(mmc, opcode); if (ret == -EIO) { dev_err(host->dev, "Tune response fail!\n"); return ret; } if (host->hs400_mode == false) { ret = msdc_tune_data(mmc, opcode); if (ret == -EIO) dev_err(host->dev, "Tune data fail!\n"); } tune_done: host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON); host->saved_tune_para.pad_tune = readl(host->base + tune_reg); host->saved_tune_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE); if (host->top_base) { host->saved_tune_para.emmc_top_control = readl(host->top_base + EMMC_TOP_CONTROL); host->saved_tune_para.emmc_top_cmd = readl(host->top_base + EMMC_TOP_CMD); } return ret; } static int msdc_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios) { struct msdc_host *host = mmc_priv(mmc); host->hs400_mode = true; if (host->top_base) writel(host->hs400_ds_delay, host->top_base + EMMC50_PAD_DS_TUNE); else writel(host->hs400_ds_delay, host->base + PAD_DS_TUNE); /* hs400 mode must set it to 0 */ sdr_clr_bits(host->base + MSDC_PATCH_BIT2, MSDC_PATCH_BIT2_CFGCRCSTS); /* to improve read performance, set outstanding to 2 */ sdr_set_field(host->base + EMMC50_CFG3, EMMC50_CFG3_OUTS_WR, 2); return 0; } static void msdc_hw_reset(struct mmc_host *mmc) { struct msdc_host *host = mmc_priv(mmc); sdr_set_bits(host->base + EMMC_IOCON, 1); udelay(10); /* 10us is enough */ sdr_clr_bits(host->base + EMMC_IOCON, 1); } static void msdc_ack_sdio_irq(struct mmc_host *mmc) { unsigned long flags; struct msdc_host *host = mmc_priv(mmc); spin_lock_irqsave(&host->lock, flags); __msdc_enable_sdio_irq(host, 1); spin_unlock_irqrestore(&host->lock, flags); } static int msdc_get_cd(struct mmc_host *mmc) { struct msdc_host *host = mmc_priv(mmc); int val; if (mmc->caps & MMC_CAP_NONREMOVABLE) return 1; if (!host->internal_cd) return mmc_gpio_get_cd(mmc); val = readl(host->base + MSDC_PS) & MSDC_PS_CDSTS; if (mmc->caps2 & MMC_CAP2_CD_ACTIVE_HIGH) return !!val; else return !val; } static const struct mmc_host_ops mt_msdc_ops = { .post_req = msdc_post_req, .pre_req = msdc_pre_req, .request = msdc_ops_request, .set_ios = msdc_ops_set_ios, .get_ro = mmc_gpio_get_ro, .get_cd = msdc_get_cd, .enable_sdio_irq = msdc_enable_sdio_irq, .ack_sdio_irq = msdc_ack_sdio_irq, .start_signal_voltage_switch = msdc_ops_switch_volt, .card_busy = msdc_card_busy, .execute_tuning = msdc_execute_tuning, .prepare_hs400_tuning = msdc_prepare_hs400_tuning, .hw_reset = msdc_hw_reset, }; static void msdc_of_property_parse(struct platform_device *pdev, struct msdc_host *host) { of_property_read_u32(pdev->dev.of_node, "mediatek,latch-ck", &host->latch_ck); of_property_read_u32(pdev->dev.of_node, "hs400-ds-delay", &host->hs400_ds_delay); of_property_read_u32(pdev->dev.of_node, "mediatek,hs200-cmd-int-delay", &host->hs200_cmd_int_delay); of_property_read_u32(pdev->dev.of_node, "mediatek,hs400-cmd-int-delay", &host->hs400_cmd_int_delay); if (of_property_read_bool(pdev->dev.of_node, "mediatek,hs400-cmd-resp-sel-rising")) host->hs400_cmd_resp_sel_rising = true; else host->hs400_cmd_resp_sel_rising = false; } static int msdc_drv_probe(struct platform_device *pdev) { struct mmc_host *mmc; struct msdc_host *host; struct resource *res; int ret; if (!pdev->dev.of_node) { dev_err(&pdev->dev, "No DT found\n"); return -EINVAL; } /* Allocate MMC host for this device */ mmc = mmc_alloc_host(sizeof(struct msdc_host), &pdev->dev); if (!mmc) return -ENOMEM; host = mmc_priv(mmc); ret = mmc_of_parse(mmc); if (ret) goto host_free; host->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(host->base)) { ret = PTR_ERR(host->base); goto host_free; } res = platform_get_resource(pdev, IORESOURCE_MEM, 1); if (res) { host->top_base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(host->top_base)) host->top_base = NULL; } ret = mmc_regulator_get_supply(mmc); if (ret) goto host_free; host->src_clk = devm_clk_get(&pdev->dev, "source"); if (IS_ERR(host->src_clk)) { ret = PTR_ERR(host->src_clk); goto host_free; } host->h_clk = devm_clk_get(&pdev->dev, "hclk"); if (IS_ERR(host->h_clk)) { ret = PTR_ERR(host->h_clk); goto host_free; } host->bus_clk = devm_clk_get(&pdev->dev, "bus_clk"); if (IS_ERR(host->bus_clk)) host->bus_clk = NULL; /*source clock control gate is optional clock*/ host->src_clk_cg = devm_clk_get(&pdev->dev, "source_cg"); if (IS_ERR(host->src_clk_cg)) host->src_clk_cg = NULL; host->irq = platform_get_irq(pdev, 0); if (host->irq < 0) { ret = -EINVAL; goto host_free; } host->pinctrl = devm_pinctrl_get(&pdev->dev); if (IS_ERR(host->pinctrl)) { ret = PTR_ERR(host->pinctrl); dev_err(&pdev->dev, "Cannot find pinctrl!\n"); goto host_free; } host->pins_default = pinctrl_lookup_state(host->pinctrl, "default"); if (IS_ERR(host->pins_default)) { ret = PTR_ERR(host->pins_default); dev_err(&pdev->dev, "Cannot find pinctrl default!\n"); goto host_free; } host->pins_uhs = pinctrl_lookup_state(host->pinctrl, "state_uhs"); if (IS_ERR(host->pins_uhs)) { ret = PTR_ERR(host->pins_uhs); dev_err(&pdev->dev, "Cannot find pinctrl uhs!\n"); goto host_free; } msdc_of_property_parse(pdev, host); host->dev = &pdev->dev; host->dev_comp = of_device_get_match_data(&pdev->dev); host->mmc = mmc; host->src_clk_freq = clk_get_rate(host->src_clk); /* Set host parameters to mmc */ mmc->ops = &mt_msdc_ops; if (host->dev_comp->clk_div_bits == 8) mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 255); else mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 4095); if (!(mmc->caps & MMC_CAP_NONREMOVABLE) && !mmc_can_gpio_cd(mmc) && host->dev_comp->use_internal_cd) { /* * Is removable but no GPIO declared, so * use internal functionality. */ host->internal_cd = true; } if (mmc->caps & MMC_CAP_SDIO_IRQ) mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD; mmc->caps |= MMC_CAP_ERASE | MMC_CAP_CMD23; /* MMC core transfer sizes tunable parameters */ mmc->max_segs = MAX_BD_NUM; if (host->dev_comp->support_64g) mmc->max_seg_size = BDMA_DESC_BUFLEN_EXT; else mmc->max_seg_size = BDMA_DESC_BUFLEN; mmc->max_blk_size = 2048; mmc->max_req_size = 512 * 1024; mmc->max_blk_count = mmc->max_req_size / 512; if (host->dev_comp->support_64g) host->dma_mask = DMA_BIT_MASK(36); else host->dma_mask = DMA_BIT_MASK(32); mmc_dev(mmc)->dma_mask = &host->dma_mask; host->timeout_clks = 3 * 1048576; host->dma.gpd = dma_alloc_coherent(&pdev->dev, 2 * sizeof(struct mt_gpdma_desc), &host->dma.gpd_addr, GFP_KERNEL); host->dma.bd = dma_alloc_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc), &host->dma.bd_addr, GFP_KERNEL); if (!host->dma.gpd || !host->dma.bd) { ret = -ENOMEM; goto release_mem; } msdc_init_gpd_bd(host, &host->dma); INIT_DELAYED_WORK(&host->req_timeout, msdc_request_timeout); spin_lock_init(&host->lock); platform_set_drvdata(pdev, mmc); msdc_ungate_clock(host); msdc_init_hw(host); ret = devm_request_irq(&pdev->dev, host->irq, msdc_irq, IRQF_TRIGGER_NONE, pdev->name, host); if (ret) goto release; pm_runtime_set_active(host->dev); pm_runtime_set_autosuspend_delay(host->dev, MTK_MMC_AUTOSUSPEND_DELAY); pm_runtime_use_autosuspend(host->dev); pm_runtime_enable(host->dev); ret = mmc_add_host(mmc); if (ret) goto end; return 0; end: pm_runtime_disable(host->dev); release: platform_set_drvdata(pdev, NULL); msdc_deinit_hw(host); msdc_gate_clock(host); release_mem: if (host->dma.gpd) dma_free_coherent(&pdev->dev, 2 * sizeof(struct mt_gpdma_desc), host->dma.gpd, host->dma.gpd_addr); if (host->dma.bd) dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc), host->dma.bd, host->dma.bd_addr); host_free: mmc_free_host(mmc); return ret; } static int msdc_drv_remove(struct platform_device *pdev) { struct mmc_host *mmc; struct msdc_host *host; mmc = platform_get_drvdata(pdev); host = mmc_priv(mmc); pm_runtime_get_sync(host->dev); platform_set_drvdata(pdev, NULL); mmc_remove_host(host->mmc); msdc_deinit_hw(host); msdc_gate_clock(host); pm_runtime_disable(host->dev); pm_runtime_put_noidle(host->dev); dma_free_coherent(&pdev->dev, 2 * sizeof(struct mt_gpdma_desc), host->dma.gpd, host->dma.gpd_addr); dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc), host->dma.bd, host->dma.bd_addr); mmc_free_host(host->mmc); return 0; } #ifdef CONFIG_PM static void msdc_save_reg(struct msdc_host *host) { u32 tune_reg = host->dev_comp->pad_tune_reg; host->save_para.msdc_cfg = readl(host->base + MSDC_CFG); host->save_para.iocon = readl(host->base + MSDC_IOCON); host->save_para.sdc_cfg = readl(host->base + SDC_CFG); host->save_para.patch_bit0 = readl(host->base + MSDC_PATCH_BIT); host->save_para.patch_bit1 = readl(host->base + MSDC_PATCH_BIT1); host->save_para.patch_bit2 = readl(host->base + MSDC_PATCH_BIT2); host->save_para.pad_ds_tune = readl(host->base + PAD_DS_TUNE); host->save_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE); host->save_para.emmc50_cfg0 = readl(host->base + EMMC50_CFG0); host->save_para.emmc50_cfg3 = readl(host->base + EMMC50_CFG3); host->save_para.sdc_fifo_cfg = readl(host->base + SDC_FIFO_CFG); if (host->top_base) { host->save_para.emmc_top_control = readl(host->top_base + EMMC_TOP_CONTROL); host->save_para.emmc_top_cmd = readl(host->top_base + EMMC_TOP_CMD); host->save_para.emmc50_pad_ds_tune = readl(host->top_base + EMMC50_PAD_DS_TUNE); } else { host->save_para.pad_tune = readl(host->base + tune_reg); } } static void msdc_restore_reg(struct msdc_host *host) { u32 tune_reg = host->dev_comp->pad_tune_reg; writel(host->save_para.msdc_cfg, host->base + MSDC_CFG); writel(host->save_para.iocon, host->base + MSDC_IOCON); writel(host->save_para.sdc_cfg, host->base + SDC_CFG); writel(host->save_para.patch_bit0, host->base + MSDC_PATCH_BIT); writel(host->save_para.patch_bit1, host->base + MSDC_PATCH_BIT1); writel(host->save_para.patch_bit2, host->base + MSDC_PATCH_BIT2); writel(host->save_para.pad_ds_tune, host->base + PAD_DS_TUNE); writel(host->save_para.pad_cmd_tune, host->base + PAD_CMD_TUNE); writel(host->save_para.emmc50_cfg0, host->base + EMMC50_CFG0); writel(host->save_para.emmc50_cfg3, host->base + EMMC50_CFG3); writel(host->save_para.sdc_fifo_cfg, host->base + SDC_FIFO_CFG); if (host->top_base) { writel(host->save_para.emmc_top_control, host->top_base + EMMC_TOP_CONTROL); writel(host->save_para.emmc_top_cmd, host->top_base + EMMC_TOP_CMD); writel(host->save_para.emmc50_pad_ds_tune, host->top_base + EMMC50_PAD_DS_TUNE); } else { writel(host->save_para.pad_tune, host->base + tune_reg); } if (sdio_irq_claimed(host->mmc)) __msdc_enable_sdio_irq(host, 1); } static int msdc_runtime_suspend(struct device *dev) { struct mmc_host *mmc = dev_get_drvdata(dev); struct msdc_host *host = mmc_priv(mmc); msdc_save_reg(host); msdc_gate_clock(host); return 0; } static int msdc_runtime_resume(struct device *dev) { struct mmc_host *mmc = dev_get_drvdata(dev); struct msdc_host *host = mmc_priv(mmc); msdc_ungate_clock(host); msdc_restore_reg(host); return 0; } #endif static const struct dev_pm_ops msdc_dev_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) SET_RUNTIME_PM_OPS(msdc_runtime_suspend, msdc_runtime_resume, NULL) }; static struct platform_driver mt_msdc_driver = { .probe = msdc_drv_probe, .remove = msdc_drv_remove, .driver = { .name = "mtk-msdc", .of_match_table = msdc_of_ids, .pm = &msdc_dev_pm_ops, }, }; module_platform_driver(mt_msdc_driver); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("MediaTek SD/MMC Card Driver");