| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (c) 2014-2015 MediaTek Inc. |
| * Author: Chaotian.Jing <chaotian.jing@mediatek.com> |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/clk.h> |
| #include <linux/delay.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/ioport.h> |
| #include <linux/irq.h> |
| #include <linux/of_address.h> |
| #include <linux/of_device.h> |
| #include <linux/of_irq.h> |
| #include <linux/of_gpio.h> |
| #include <linux/pinctrl/consumer.h> |
| #include <linux/platform_device.h> |
| #include <linux/pm.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <linux/interrupt.h> |
| #include <linux/reset.h> |
| |
| #include <linux/mmc/card.h> |
| #include <linux/mmc/core.h> |
| #include <linux/mmc/host.h> |
| #include <linux/mmc/mmc.h> |
| #include <linux/mmc/sd.h> |
| #include <linux/mmc/sdio.h> |
| #include <linux/mmc/slot-gpio.h> |
| |
| #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_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 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 reset_control *reset; |
| |
| 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, |
| .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, |
| .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, |
| .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, |
| .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, |
| .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, |
| .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, |
| .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, |
| .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 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; |
| } |
| |
| 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; |
| |
| /* |
| * No need check the return value of cancel_delayed_work, as only ONE |
| * path will go here! |
| */ |
| cancel_delayed_work(&host->req_timeout); |
| |
| 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); |
| } |
| |
| /* 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; |
| |
| 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; |
| rsp = cmd->resp; |
| |
| 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; |
| 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; |
| stop = data->stop; |
| |
| 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 = 0; |
| |
| 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) { |
| dev_dbg(host->dev, "Regulator set error %d (%d)\n", |
| ret, ios->signal_voltage); |
| } else { |
| /* 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 ret; |
| } |
| |
| 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); |
| } 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; |
| |
| if (host->reset) { |
| reset_control_assert(host->reset); |
| usleep_range(10, 50); |
| reset_control_deassert(host->reset); |
| } |
| |
| /* 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; |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| host->base = devm_ioremap_resource(&pdev->dev, res); |
| 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->reset = devm_reset_control_get_optional_exclusive(&pdev->dev, |
| "hrst"); |
| if (IS_ERR(host->reset)) |
| return PTR_ERR(host->reset); |
| |
| host->irq = platform_get_irq(pdev, 0); |
| if (host->irq < 0) { |
| ret = host->irq; |
| 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"); |