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@@ -0,0 +1,1394 @@
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+// SPDX-License-Identifier: GPL-2.0
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+/*
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+ * MediaTek SD/MMC Card Interface driver
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+ *
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+ * Copyright (C) 2018 MediaTek Inc.
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+ * Author: Weijie Gao <weijie.gao@mediatek.com>
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+ */
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+
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+#include <clk.h>
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+#include <common.h>
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+#include <dm.h>
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+#include <mmc.h>
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+#include <errno.h>
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+#include <malloc.h>
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+#include <stdbool.h>
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+#include <asm/gpio.h>
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+#include <dm/pinctrl.h>
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+#include <linux/bitops.h>
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+#include <linux/io.h>
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+#include <linux/iopoll.h>
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+
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+/* MSDC_CFG */
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+#define MSDC_CFG_HS400_CK_MODE_EXT BIT(22)
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+#define MSDC_CFG_CKMOD_EXT_M 0x300000
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+#define MSDC_CFG_CKMOD_EXT_S 20
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+#define MSDC_CFG_CKDIV_EXT_M 0xfff00
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+#define MSDC_CFG_CKDIV_EXT_S 8
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+#define MSDC_CFG_HS400_CK_MODE BIT(18)
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+#define MSDC_CFG_CKMOD_M 0x30000
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+#define MSDC_CFG_CKMOD_S 16
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+#define MSDC_CFG_CKDIV_M 0xff00
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+#define MSDC_CFG_CKDIV_S 8
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+#define MSDC_CFG_CKSTB BIT(7)
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+#define MSDC_CFG_PIO BIT(3)
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+#define MSDC_CFG_RST BIT(2)
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+#define MSDC_CFG_CKPDN BIT(1)
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+#define MSDC_CFG_MODE BIT(0)
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+
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+/* MSDC_IOCON */
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+#define MSDC_IOCON_W_DSPL BIT(8)
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+#define MSDC_IOCON_DSPL BIT(2)
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+#define MSDC_IOCON_RSPL BIT(1)
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+
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+/* MSDC_PS */
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+#define MSDC_PS_DAT0 BIT(16)
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+#define MSDC_PS_CDDBCE_M 0xf000
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+#define MSDC_PS_CDDBCE_S 12
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+#define MSDC_PS_CDSTS BIT(1)
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+#define MSDC_PS_CDEN BIT(0)
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+
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+/* #define MSDC_INT(EN) */
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+#define MSDC_INT_ACMDRDY BIT(3)
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+#define MSDC_INT_ACMDTMO BIT(4)
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+#define MSDC_INT_ACMDCRCERR BIT(5)
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+#define MSDC_INT_CMDRDY BIT(8)
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+#define MSDC_INT_CMDTMO BIT(9)
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+#define MSDC_INT_RSPCRCERR BIT(10)
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+#define MSDC_INT_XFER_COMPL BIT(12)
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+#define MSDC_INT_DATTMO BIT(14)
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+#define MSDC_INT_DATCRCERR BIT(15)
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+
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+/* MSDC_FIFOCS */
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+#define MSDC_FIFOCS_CLR BIT(31)
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+#define MSDC_FIFOCS_TXCNT_M 0xff0000
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+#define MSDC_FIFOCS_TXCNT_S 16
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+#define MSDC_FIFOCS_RXCNT_M 0xff
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+#define MSDC_FIFOCS_RXCNT_S 0
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+
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+/* #define SDC_CFG */
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+#define SDC_CFG_DTOC_M 0xff000000
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+#define SDC_CFG_DTOC_S 24
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+#define SDC_CFG_SDIOIDE BIT(20)
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+#define SDC_CFG_SDIO BIT(19)
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+#define SDC_CFG_BUSWIDTH_M 0x30000
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+#define SDC_CFG_BUSWIDTH_S 16
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+
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+/* SDC_CMD */
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+#define SDC_CMD_BLK_LEN_M 0xfff0000
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+#define SDC_CMD_BLK_LEN_S 16
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+#define SDC_CMD_STOP BIT(14)
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+#define SDC_CMD_WR BIT(13)
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+#define SDC_CMD_DTYPE_M 0x1800
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+#define SDC_CMD_DTYPE_S 11
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+#define SDC_CMD_RSPTYP_M 0x380
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+#define SDC_CMD_RSPTYP_S 7
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+#define SDC_CMD_CMD_M 0x3f
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+#define SDC_CMD_CMD_S 0
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+
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+/* SDC_STS */
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+#define SDC_STS_CMDBUSY BIT(1)
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+#define SDC_STS_SDCBUSY BIT(0)
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+
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+/* SDC_ADV_CFG0 */
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+#define SDC_RX_ENHANCE_EN BIT(20)
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+
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+/* PATCH_BIT0 */
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+#define MSDC_INT_DAT_LATCH_CK_SEL_M 0x380
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+#define MSDC_INT_DAT_LATCH_CK_SEL_S 7
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+
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+/* PATCH_BIT1 */
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+#define MSDC_PB1_STOP_DLY_M 0xf00
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+#define MSDC_PB1_STOP_DLY_S 8
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+
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+/* PATCH_BIT2 */
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+#define MSDC_PB2_CRCSTSENSEL_M 0xe0000000
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+#define MSDC_PB2_CRCSTSENSEL_S 29
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+#define MSDC_PB2_CFGCRCSTS BIT(28)
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+#define MSDC_PB2_RESPSTSENSEL_M 0x70000
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+#define MSDC_PB2_RESPSTSENSEL_S 16
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+#define MSDC_PB2_CFGRESP BIT(15)
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+#define MSDC_PB2_RESPWAIT_M 0x0c
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+#define MSDC_PB2_RESPWAIT_S 2
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+
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+/* PAD_TUNE */
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+#define MSDC_PAD_TUNE_CMDRRDLY_M 0x7c00000
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+#define MSDC_PAD_TUNE_CMDRRDLY_S 22
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+#define MSDC_PAD_TUNE_CMD_SEL BIT(21)
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+#define MSDC_PAD_TUNE_CMDRDLY_M 0x1f0000
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+#define MSDC_PAD_TUNE_CMDRDLY_S 16
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+#define MSDC_PAD_TUNE_RXDLYSEL BIT(15)
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+#define MSDC_PAD_TUNE_RD_SEL BIT(13)
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+#define MSDC_PAD_TUNE_DATRRDLY_M 0x1f00
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+#define MSDC_PAD_TUNE_DATRRDLY_S 8
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+#define MSDC_PAD_TUNE_DATWRDLY_M 0x1f
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+#define MSDC_PAD_TUNE_DATWRDLY_S 0
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+
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+/* EMMC50_CFG0 */
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+#define EMMC50_CFG_CFCSTS_SEL BIT(4)
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+
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+/* SDC_FIFO_CFG */
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+#define SDC_FIFO_CFG_WRVALIDSEL BIT(24)
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+#define SDC_FIFO_CFG_RDVALIDSEL BIT(25)
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+
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+/* SDC_CFG_BUSWIDTH */
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+#define MSDC_BUS_1BITS 0x0
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+#define MSDC_BUS_4BITS 0x1
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+#define MSDC_BUS_8BITS 0x2
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+
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+#define MSDC_FIFO_SIZE 128
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+
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+#define PAD_DELAY_MAX 32
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+
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+#define DEFAULT_CD_DEBOUNCE 8
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+
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+#define CMD_INTS_MASK \
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+ (MSDC_INT_CMDRDY | MSDC_INT_RSPCRCERR | MSDC_INT_CMDTMO)
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+
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+#define DATA_INTS_MASK \
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+ (MSDC_INT_XFER_COMPL | MSDC_INT_DATTMO | MSDC_INT_DATCRCERR)
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+
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+/* Register offset */
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+struct mtk_sd_regs {
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+ u32 msdc_cfg;
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+ u32 msdc_iocon;
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+ u32 msdc_ps;
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+ u32 msdc_int;
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+ u32 msdc_inten;
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+ u32 msdc_fifocs;
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+ u32 msdc_txdata;
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+ u32 msdc_rxdata;
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+ u32 reserved0[4];
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+ u32 sdc_cfg;
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+ u32 sdc_cmd;
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+ u32 sdc_arg;
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+ u32 sdc_sts;
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+ u32 sdc_resp[4];
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+ u32 sdc_blk_num;
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+ u32 sdc_vol_chg;
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+ u32 sdc_csts;
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+ u32 sdc_csts_en;
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+ u32 sdc_datcrc_sts;
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+ u32 sdc_adv_cfg0;
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+ u32 reserved1[2];
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+ u32 emmc_cfg0;
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+ u32 emmc_cfg1;
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+ u32 emmc_sts;
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+ u32 emmc_iocon;
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+ u32 sd_acmd_resp;
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+ u32 sd_acmd19_trg;
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+ u32 sd_acmd19_sts;
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+ u32 dma_sa_high4bit;
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+ u32 dma_sa;
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+ u32 dma_ca;
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+ u32 dma_ctrl;
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+ u32 dma_cfg;
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+ u32 sw_dbg_sel;
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+ u32 sw_dbg_out;
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+ u32 dma_length;
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+ u32 reserved2;
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+ u32 patch_bit0;
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+ u32 patch_bit1;
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+ u32 patch_bit2;
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+ u32 reserved3;
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+ u32 dat0_tune_crc;
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+ u32 dat1_tune_crc;
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+ u32 dat2_tune_crc;
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+ u32 dat3_tune_crc;
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+ u32 cmd_tune_crc;
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+ u32 sdio_tune_wind;
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+ u32 reserved4[5];
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+ u32 pad_tune;
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+ u32 pad_tune0;
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+ u32 pad_tune1;
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+ u32 dat_rd_dly[4];
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+ u32 reserved5[2];
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+ u32 hw_dbg_sel;
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+ u32 main_ver;
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+ u32 eco_ver;
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+ u32 reserved6[27];
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+ u32 pad_ds_tune;
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+ u32 reserved7[31];
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+ u32 emmc50_cfg0;
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+ u32 reserved8[7];
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+ u32 sdc_fifo_cfg;
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+};
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+
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+struct msdc_compatible {
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+ u8 clk_div_bits;
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+ bool pad_tune0;
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+ bool async_fifo;
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+ bool data_tune;
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+ bool busy_check;
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+ bool stop_clk_fix;
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+ bool enhance_rx;
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+};
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+
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+struct msdc_delay_phase {
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+ u8 maxlen;
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+ u8 start;
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+ u8 final_phase;
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+};
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+
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+struct msdc_plat {
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+ struct mmc_config cfg;
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+ struct mmc mmc;
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+};
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+
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+struct msdc_tune_para {
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+ u32 iocon;
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+ u32 pad_tune;
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+};
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+
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+struct msdc_host {
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+ struct mtk_sd_regs *base;
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+ struct mmc *mmc;
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+
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+ struct msdc_compatible *dev_comp;
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+
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+ struct clk src_clk; /* for SD/MMC bus clock */
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+ struct clk h_clk; /* MSDC core clock */
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+
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+ u32 src_clk_freq; /* source clock */
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+ u32 mclk; /* mmc framework required bus clock */
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+ u32 sclk; /* actual calculated bus clock */
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+
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+ /* operation timeout clocks */
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+ u32 timeout_ns;
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+ u32 timeout_clks;
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+
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+ /* tuning options */
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+ u32 hs400_ds_delay;
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+ u32 hs200_cmd_int_delay;
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+ u32 hs200_write_int_delay;
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+ u32 latch_ck;
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+ u32 r_smpl; /* sample edge */
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+ bool hs400_mode;
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+
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+ /* whether to use gpio detection or built-in hw detection */
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+ bool builtin_cd;
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+
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+ /* card detection / write protection GPIOs */
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+#ifdef CONFIG_DM_GPIO
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+ struct gpio_desc gpio_wp;
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+ struct gpio_desc gpio_cd;
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+#endif
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+
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+ uint last_resp_type;
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+ uint last_data_write;
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+
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+ enum bus_mode timing;
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+
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+ struct msdc_tune_para def_tune_para;
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+ struct msdc_tune_para saved_tune_para;
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+};
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+
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+static void msdc_reset_hw(struct msdc_host *host)
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+{
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+ u32 reg;
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+
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+ setbits_le32(&host->base->msdc_cfg, MSDC_CFG_RST);
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+
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+ readl_poll_timeout(&host->base->msdc_cfg, reg,
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+ !(reg & MSDC_CFG_RST), 1000000);
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+}
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+
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+static void msdc_fifo_clr(struct msdc_host *host)
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+{
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+ u32 reg;
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+
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+ setbits_le32(&host->base->msdc_fifocs, MSDC_FIFOCS_CLR);
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+
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+ readl_poll_timeout(&host->base->msdc_fifocs, reg,
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+ !(reg & MSDC_FIFOCS_CLR), 1000000);
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+}
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+
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+static u32 msdc_fifo_rx_bytes(struct msdc_host *host)
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+{
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+ return (readl(&host->base->msdc_fifocs) &
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+ MSDC_FIFOCS_RXCNT_M) >> MSDC_FIFOCS_RXCNT_S;
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+}
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+
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+static u32 msdc_fifo_tx_bytes(struct msdc_host *host)
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+{
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+ return (readl(&host->base->msdc_fifocs) &
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+ MSDC_FIFOCS_TXCNT_M) >> MSDC_FIFOCS_TXCNT_S;
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+}
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+
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+static u32 msdc_cmd_find_resp(struct msdc_host *host, struct mmc_cmd *cmd)
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+{
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+ u32 resp;
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+
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+ switch (cmd->resp_type) {
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+ /* Actually, R1, R5, R6, R7 are the same */
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+ case MMC_RSP_R1:
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+ resp = 0x1;
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+ break;
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+ case MMC_RSP_R1b:
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+ resp = 0x7;
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+ break;
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+ case MMC_RSP_R2:
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+ resp = 0x2;
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+ break;
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+ case MMC_RSP_R3:
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+ resp = 0x3;
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+ break;
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+ case MMC_RSP_NONE:
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+ default:
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+ resp = 0x0;
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+ break;
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+ }
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+
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+ return resp;
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+}
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+
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+static u32 msdc_cmd_prepare_raw_cmd(struct msdc_host *host,
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+ struct mmc_cmd *cmd,
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+ struct mmc_data *data)
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+{
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+ u32 opcode = cmd->cmdidx;
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+ u32 resp_type = msdc_cmd_find_resp(host, cmd);
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+ uint blocksize = 0;
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+ u32 dtype = 0;
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+ u32 rawcmd = 0;
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+
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+ switch (opcode) {
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+ case MMC_CMD_WRITE_MULTIPLE_BLOCK:
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+ case MMC_CMD_READ_MULTIPLE_BLOCK:
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+ dtype = 2;
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+ break;
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+ case MMC_CMD_WRITE_SINGLE_BLOCK:
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+ case MMC_CMD_READ_SINGLE_BLOCK:
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+ case SD_CMD_APP_SEND_SCR:
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+ dtype = 1;
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+ break;
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+ case SD_CMD_SWITCH_FUNC: /* same as MMC_CMD_SWITCH */
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+ case SD_CMD_SEND_IF_COND: /* same as MMC_CMD_SEND_EXT_CSD */
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+ case SD_CMD_APP_SD_STATUS: /* same as MMC_CMD_SEND_STATUS */
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+ if (data)
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+ dtype = 1;
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+ }
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+
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+ if (data) {
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+ if (data->flags == MMC_DATA_WRITE)
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+ rawcmd |= SDC_CMD_WR;
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+
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+ if (data->blocks > 1)
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+ dtype = 2;
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+
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+ blocksize = data->blocksize;
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+ }
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+
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+ rawcmd |= ((opcode << SDC_CMD_CMD_S) & SDC_CMD_CMD_M) |
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+ ((resp_type << SDC_CMD_RSPTYP_S) & SDC_CMD_RSPTYP_M) |
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+ ((blocksize << SDC_CMD_BLK_LEN_S) & SDC_CMD_BLK_LEN_M) |
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+ ((dtype << SDC_CMD_DTYPE_S) & SDC_CMD_DTYPE_M);
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+
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+ if (opcode == MMC_CMD_STOP_TRANSMISSION)
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+ rawcmd |= SDC_CMD_STOP;
|
|
|
+
|
|
|
+ return rawcmd;
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_cmd_done(struct msdc_host *host, int events,
|
|
|
+ struct mmc_cmd *cmd)
|
|
|
+{
|
|
|
+ u32 *rsp = cmd->response;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ if (cmd->resp_type & MMC_RSP_PRESENT) {
|
|
|
+ if (cmd->resp_type & MMC_RSP_136) {
|
|
|
+ rsp[0] = readl(&host->base->sdc_resp[3]);
|
|
|
+ rsp[1] = readl(&host->base->sdc_resp[2]);
|
|
|
+ rsp[2] = readl(&host->base->sdc_resp[1]);
|
|
|
+ rsp[3] = readl(&host->base->sdc_resp[0]);
|
|
|
+ } else {
|
|
|
+ rsp[0] = readl(&host->base->sdc_resp[0]);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!(events & MSDC_INT_CMDRDY)) {
|
|
|
+ if (cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK &&
|
|
|
+ cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK_HS200)
|
|
|
+ /*
|
|
|
+ * should not clear fifo/interrupt as the tune data
|
|
|
+ * may have alreay come.
|
|
|
+ */
|
|
|
+ msdc_reset_hw(host);
|
|
|
+
|
|
|
+ if (events & MSDC_INT_CMDTMO)
|
|
|
+ ret = -ETIMEDOUT;
|
|
|
+ else
|
|
|
+ ret = -EIO;
|
|
|
+ }
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static bool msdc_cmd_is_ready(struct msdc_host *host)
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ u32 reg;
|
|
|
+
|
|
|
+ /* The max busy time we can endure is 20ms */
|
|
|
+ ret = readl_poll_timeout(&host->base->sdc_sts, reg,
|
|
|
+ !(reg & SDC_STS_CMDBUSY), 20000);
|
|
|
+
|
|
|
+ if (ret) {
|
|
|
+ pr_err("CMD bus busy detected\n");
|
|
|
+ msdc_reset_hw(host);
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (host->last_resp_type == MMC_RSP_R1b && host->last_data_write) {
|
|
|
+ ret = readl_poll_timeout(&host->base->msdc_ps, reg,
|
|
|
+ reg & MSDC_PS_DAT0, 1000000);
|
|
|
+
|
|
|
+ if (ret) {
|
|
|
+ pr_err("Card stuck in programming state!\n");
|
|
|
+ msdc_reset_hw(host);
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return true;
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_start_command(struct msdc_host *host, struct mmc_cmd *cmd,
|
|
|
+ struct mmc_data *data)
|
|
|
+{
|
|
|
+ u32 rawcmd;
|
|
|
+ u32 status;
|
|
|
+ u32 blocks = 0;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ if (!msdc_cmd_is_ready(host))
|
|
|
+ return -EIO;
|
|
|
+
|
|
|
+ msdc_fifo_clr(host);
|
|
|
+
|
|
|
+ host->last_resp_type = cmd->resp_type;
|
|
|
+ host->last_data_write = 0;
|
|
|
+
|
|
|
+ rawcmd = msdc_cmd_prepare_raw_cmd(host, cmd, data);
|
|
|
+
|
|
|
+ if (data)
|
|
|
+ blocks = data->blocks;
|
|
|
+
|
|
|
+ writel(CMD_INTS_MASK, &host->base->msdc_int);
|
|
|
+ writel(blocks, &host->base->sdc_blk_num);
|
|
|
+ writel(cmd->cmdarg, &host->base->sdc_arg);
|
|
|
+ writel(rawcmd, &host->base->sdc_cmd);
|
|
|
+
|
|
|
+ ret = readl_poll_timeout(&host->base->msdc_int, status,
|
|
|
+ status & CMD_INTS_MASK, 1000000);
|
|
|
+
|
|
|
+ if (ret)
|
|
|
+ status = MSDC_INT_CMDTMO;
|
|
|
+
|
|
|
+ return msdc_cmd_done(host, status, cmd);
|
|
|
+}
|
|
|
+
|
|
|
+static void msdc_fifo_read(struct msdc_host *host, u8 *buf, u32 size)
|
|
|
+{
|
|
|
+ u32 *wbuf;
|
|
|
+
|
|
|
+ while ((size_t)buf % 4) {
|
|
|
+ *buf++ = readb(&host->base->msdc_rxdata);
|
|
|
+ size--;
|
|
|
+ }
|
|
|
+
|
|
|
+ wbuf = (u32 *)buf;
|
|
|
+ while (size >= 4) {
|
|
|
+ *wbuf++ = readl(&host->base->msdc_rxdata);
|
|
|
+ size -= 4;
|
|
|
+ }
|
|
|
+
|
|
|
+ buf = (u8 *)wbuf;
|
|
|
+ while (size) {
|
|
|
+ *buf++ = readb(&host->base->msdc_rxdata);
|
|
|
+ size--;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void msdc_fifo_write(struct msdc_host *host, const u8 *buf, u32 size)
|
|
|
+{
|
|
|
+ const u32 *wbuf;
|
|
|
+
|
|
|
+ while ((size_t)buf % 4) {
|
|
|
+ writeb(*buf++, &host->base->msdc_txdata);
|
|
|
+ size--;
|
|
|
+ }
|
|
|
+
|
|
|
+ wbuf = (const u32 *)buf;
|
|
|
+ while (size >= 4) {
|
|
|
+ writel(*wbuf++, &host->base->msdc_txdata);
|
|
|
+ size -= 4;
|
|
|
+ }
|
|
|
+
|
|
|
+ buf = (const u8 *)wbuf;
|
|
|
+ while (size) {
|
|
|
+ writeb(*buf++, &host->base->msdc_txdata);
|
|
|
+ size--;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_pio_read(struct msdc_host *host, u8 *ptr, u32 size)
|
|
|
+{
|
|
|
+ u32 status;
|
|
|
+ u32 chksz;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ while (1) {
|
|
|
+ status = readl(&host->base->msdc_int);
|
|
|
+ writel(status, &host->base->msdc_int);
|
|
|
+ status &= DATA_INTS_MASK;
|
|
|
+
|
|
|
+ if (status & MSDC_INT_DATCRCERR) {
|
|
|
+ ret = -EIO;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (status & MSDC_INT_DATTMO) {
|
|
|
+ ret = -ETIMEDOUT;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (status & MSDC_INT_XFER_COMPL) {
|
|
|
+ if (size) {
|
|
|
+ pr_err("data not fully read\n");
|
|
|
+ ret = -EIO;
|
|
|
+ }
|
|
|
+
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ chksz = min(size, (u32)MSDC_FIFO_SIZE);
|
|
|
+
|
|
|
+ if (msdc_fifo_rx_bytes(host) >= chksz) {
|
|
|
+ msdc_fifo_read(host, ptr, chksz);
|
|
|
+ ptr += chksz;
|
|
|
+ size -= chksz;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_pio_write(struct msdc_host *host, const u8 *ptr, u32 size)
|
|
|
+{
|
|
|
+ u32 status;
|
|
|
+ u32 chksz;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ while (1) {
|
|
|
+ status = readl(&host->base->msdc_int);
|
|
|
+ writel(status, &host->base->msdc_int);
|
|
|
+ status &= DATA_INTS_MASK;
|
|
|
+
|
|
|
+ if (status & MSDC_INT_DATCRCERR) {
|
|
|
+ ret = -EIO;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (status & MSDC_INT_DATTMO) {
|
|
|
+ ret = -ETIMEDOUT;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (status & MSDC_INT_XFER_COMPL) {
|
|
|
+ if (size) {
|
|
|
+ pr_err("data not fully written\n");
|
|
|
+ ret = -EIO;
|
|
|
+ }
|
|
|
+
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ chksz = min(size, (u32)MSDC_FIFO_SIZE);
|
|
|
+
|
|
|
+ if (MSDC_FIFO_SIZE - msdc_fifo_tx_bytes(host) >= chksz) {
|
|
|
+ msdc_fifo_write(host, ptr, chksz);
|
|
|
+ ptr += chksz;
|
|
|
+ size -= chksz;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_start_data(struct msdc_host *host, struct mmc_data *data)
|
|
|
+{
|
|
|
+ u32 size;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ if (data->flags == MMC_DATA_WRITE)
|
|
|
+ host->last_data_write = 1;
|
|
|
+
|
|
|
+ writel(DATA_INTS_MASK, &host->base->msdc_int);
|
|
|
+
|
|
|
+ size = data->blocks * data->blocksize;
|
|
|
+
|
|
|
+ if (data->flags == MMC_DATA_WRITE)
|
|
|
+ ret = msdc_pio_write(host, (const u8 *)data->src, size);
|
|
|
+ else
|
|
|
+ ret = msdc_pio_read(host, (u8 *)data->dest, size);
|
|
|
+
|
|
|
+ if (ret) {
|
|
|
+ msdc_reset_hw(host);
|
|
|
+ msdc_fifo_clr(host);
|
|
|
+ }
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_ops_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
|
|
|
+ struct mmc_data *data)
|
|
|
+{
|
|
|
+ struct msdc_host *host = dev_get_priv(dev);
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ ret = msdc_start_command(host, cmd, data);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ if (data)
|
|
|
+ return msdc_start_data(host, data);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+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->sclk == 0) {
|
|
|
+ timeout = 0;
|
|
|
+ } else {
|
|
|
+ clk_ns = 1000000000UL / host->sclk;
|
|
|
+ timeout = (ns + clk_ns - 1) / clk_ns + clks;
|
|
|
+ /* unit is 1048576 sclk cycles */
|
|
|
+ timeout = (timeout + (0x1 << 20) - 1) >> 20;
|
|
|
+ if (host->dev_comp->clk_div_bits == 8)
|
|
|
+ mode = (readl(&host->base->msdc_cfg) &
|
|
|
+ MSDC_CFG_CKMOD_M) >> MSDC_CFG_CKMOD_S;
|
|
|
+ else
|
|
|
+ mode = (readl(&host->base->msdc_cfg) &
|
|
|
+ MSDC_CFG_CKMOD_EXT_M) >> MSDC_CFG_CKMOD_EXT_S;
|
|
|
+ /* 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;
|
|
|
+ }
|
|
|
+
|
|
|
+ clrsetbits_le32(&host->base->sdc_cfg, SDC_CFG_DTOC_M,
|
|
|
+ timeout << SDC_CFG_DTOC_S);
|
|
|
+}
|
|
|
+
|
|
|
+static void msdc_set_buswidth(struct msdc_host *host, u32 width)
|
|
|
+{
|
|
|
+ u32 val = readl(&host->base->sdc_cfg);
|
|
|
+
|
|
|
+ val &= ~SDC_CFG_BUSWIDTH_M;
|
|
|
+
|
|
|
+ switch (width) {
|
|
|
+ default:
|
|
|
+ case 1:
|
|
|
+ val |= (MSDC_BUS_1BITS << SDC_CFG_BUSWIDTH_S);
|
|
|
+ break;
|
|
|
+ case 4:
|
|
|
+ val |= (MSDC_BUS_4BITS << SDC_CFG_BUSWIDTH_S);
|
|
|
+ break;
|
|
|
+ case 8:
|
|
|
+ val |= (MSDC_BUS_8BITS << SDC_CFG_BUSWIDTH_S);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ writel(val, &host->base->sdc_cfg);
|
|
|
+}
|
|
|
+
|
|
|
+static void msdc_set_mclk(struct msdc_host *host, enum bus_mode timing, u32 hz)
|
|
|
+{
|
|
|
+ u32 mode;
|
|
|
+ u32 div;
|
|
|
+ u32 sclk;
|
|
|
+ u32 reg;
|
|
|
+
|
|
|
+ if (!hz) {
|
|
|
+ host->mclk = 0;
|
|
|
+ clrbits_le32(&host->base->msdc_cfg, MSDC_CFG_CKPDN);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (host->dev_comp->clk_div_bits == 8)
|
|
|
+ clrbits_le32(&host->base->msdc_cfg, MSDC_CFG_HS400_CK_MODE);
|
|
|
+ else
|
|
|
+ clrbits_le32(&host->base->msdc_cfg,
|
|
|
+ MSDC_CFG_HS400_CK_MODE_EXT);
|
|
|
+
|
|
|
+ if (timing == UHS_DDR50 || timing == MMC_DDR_52 ||
|
|
|
+ timing == MMC_HS_400) {
|
|
|
+ if (timing == MMC_HS_400)
|
|
|
+ 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_HS_400 && hz >= (host->src_clk_freq >> 1)) {
|
|
|
+ if (host->dev_comp->clk_div_bits == 8)
|
|
|
+ setbits_le32(&host->base->msdc_cfg,
|
|
|
+ MSDC_CFG_HS400_CK_MODE);
|
|
|
+ else
|
|
|
+ setbits_le32(&host->base->msdc_cfg,
|
|
|
+ MSDC_CFG_HS400_CK_MODE_EXT);
|
|
|
+
|
|
|
+ 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;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ clrbits_le32(&host->base->msdc_cfg, MSDC_CFG_CKPDN);
|
|
|
+
|
|
|
+ if (host->dev_comp->clk_div_bits == 8) {
|
|
|
+ div = min(div, (u32)(MSDC_CFG_CKDIV_M >> MSDC_CFG_CKDIV_S));
|
|
|
+ clrsetbits_le32(&host->base->msdc_cfg,
|
|
|
+ MSDC_CFG_CKMOD_M | MSDC_CFG_CKDIV_M,
|
|
|
+ (mode << MSDC_CFG_CKMOD_S) |
|
|
|
+ (div << MSDC_CFG_CKDIV_S));
|
|
|
+ } else {
|
|
|
+ div = min(div, (u32)(MSDC_CFG_CKDIV_EXT_M >>
|
|
|
+ MSDC_CFG_CKDIV_EXT_S));
|
|
|
+ clrsetbits_le32(&host->base->msdc_cfg,
|
|
|
+ MSDC_CFG_CKMOD_EXT_M | MSDC_CFG_CKDIV_EXT_M,
|
|
|
+ (mode << MSDC_CFG_CKMOD_EXT_S) |
|
|
|
+ (div << MSDC_CFG_CKDIV_EXT_S));
|
|
|
+ }
|
|
|
+
|
|
|
+ readl_poll_timeout(&host->base->msdc_cfg, reg,
|
|
|
+ reg & MSDC_CFG_CKSTB, 1000000);
|
|
|
+
|
|
|
+ setbits_le32(&host->base->msdc_cfg, MSDC_CFG_CKPDN);
|
|
|
+ host->sclk = sclk;
|
|
|
+ host->mclk = hz;
|
|
|
+ host->timing = timing;
|
|
|
+
|
|
|
+ /* needed because clk changed. */
|
|
|
+ msdc_set_timeout(host, host->timeout_ns, host->timeout_clks);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * mmc_select_hs400() will drop to 50Mhz and High speed mode,
|
|
|
+ * tune result of hs200/200Mhz is not suitable for 50Mhz
|
|
|
+ */
|
|
|
+ if (host->sclk <= 52000000) {
|
|
|
+ writel(host->def_tune_para.iocon, &host->base->msdc_iocon);
|
|
|
+ writel(host->def_tune_para.pad_tune,
|
|
|
+ &host->base->pad_tune);
|
|
|
+ } else {
|
|
|
+ writel(host->saved_tune_para.iocon, &host->base->msdc_iocon);
|
|
|
+ writel(host->saved_tune_para.pad_tune,
|
|
|
+ &host->base->pad_tune);
|
|
|
+ }
|
|
|
+
|
|
|
+ dev_dbg(dev, "sclk: %d, timing: %d\n", host->sclk, timing);
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_ops_set_ios(struct udevice *dev)
|
|
|
+{
|
|
|
+ struct msdc_plat *plat = dev_get_platdata(dev);
|
|
|
+ struct msdc_host *host = dev_get_priv(dev);
|
|
|
+ struct mmc *mmc = &plat->mmc;
|
|
|
+ uint clock = mmc->clock;
|
|
|
+
|
|
|
+ msdc_set_buswidth(host, mmc->bus_width);
|
|
|
+
|
|
|
+ if (mmc->clk_disable)
|
|
|
+ clock = 0;
|
|
|
+ else if (clock < mmc->cfg->f_min)
|
|
|
+ clock = mmc->cfg->f_min;
|
|
|
+
|
|
|
+ if (host->mclk != clock || host->timing != mmc->selected_mode)
|
|
|
+ msdc_set_mclk(host, mmc->selected_mode, clock);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_ops_get_cd(struct udevice *dev)
|
|
|
+{
|
|
|
+ struct msdc_host *host = dev_get_priv(dev);
|
|
|
+ u32 val;
|
|
|
+
|
|
|
+ if (host->builtin_cd) {
|
|
|
+ val = readl(&host->base->msdc_ps);
|
|
|
+ return !(val & MSDC_PS_CDSTS);
|
|
|
+ }
|
|
|
+
|
|
|
+#ifdef CONFIG_DM_GPIO
|
|
|
+ if (!host->gpio_cd.dev)
|
|
|
+ return 1;
|
|
|
+
|
|
|
+ return dm_gpio_get_value(&host->gpio_cd);
|
|
|
+#else
|
|
|
+ return 1;
|
|
|
+#endif
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_ops_get_wp(struct udevice *dev)
|
|
|
+{
|
|
|
+ struct msdc_host *host = dev_get_priv(dev);
|
|
|
+
|
|
|
+#ifdef CONFIG_DM_GPIO
|
|
|
+ if (!host->gpio_wp.dev)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ return !dm_gpio_get_value(&host->gpio_wp);
|
|
|
+#else
|
|
|
+ return 0;
|
|
|
+#endif
|
|
|
+}
|
|
|
+
|
|
|
+#ifdef MMC_SUPPORTS_TUNING
|
|
|
+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(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 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(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 int msdc_tune_response(struct udevice *dev, u32 opcode)
|
|
|
+{
|
|
|
+ struct msdc_plat *plat = dev_get_platdata(dev);
|
|
|
+ struct msdc_host *host = dev_get_priv(dev);
|
|
|
+ struct mmc *mmc = &plat->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;
|
|
|
+ void __iomem *tune_reg = &host->base->pad_tune;
|
|
|
+ int cmd_err;
|
|
|
+ int i, j;
|
|
|
+
|
|
|
+ if (host->dev_comp->pad_tune0)
|
|
|
+ tune_reg = &host->base->pad_tune0;
|
|
|
+
|
|
|
+ if (mmc->selected_mode == MMC_HS_200 ||
|
|
|
+ mmc->selected_mode == UHS_SDR104)
|
|
|
+ clrsetbits_le32(tune_reg, MSDC_PAD_TUNE_CMDRRDLY_M,
|
|
|
+ host->hs200_cmd_int_delay <<
|
|
|
+ MSDC_PAD_TUNE_CMDRRDLY_S);
|
|
|
+
|
|
|
+ clrbits_le32(&host->base->msdc_iocon, MSDC_IOCON_RSPL);
|
|
|
+
|
|
|
+ for (i = 0; i < PAD_DELAY_MAX; i++) {
|
|
|
+ clrsetbits_le32(tune_reg, MSDC_PAD_TUNE_CMDRDLY_M,
|
|
|
+ i << MSDC_PAD_TUNE_CMDRDLY_S);
|
|
|
+
|
|
|
+ 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, do not scan falling edge */
|
|
|
+ if (final_rise_delay.maxlen >= 12 ||
|
|
|
+ (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
|
|
|
+ goto skip_fall;
|
|
|
+
|
|
|
+ setbits_le32(&host->base->msdc_iocon, MSDC_IOCON_RSPL);
|
|
|
+ for (i = 0; i < PAD_DELAY_MAX; i++) {
|
|
|
+ clrsetbits_le32(tune_reg, MSDC_PAD_TUNE_CMDRDLY_M,
|
|
|
+ i << MSDC_PAD_TUNE_CMDRDLY_S);
|
|
|
+
|
|
|
+ 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_maxlen == final_rise_delay.maxlen) {
|
|
|
+ clrbits_le32(&host->base->msdc_iocon, MSDC_IOCON_RSPL);
|
|
|
+ clrsetbits_le32(tune_reg, MSDC_PAD_TUNE_CMDRDLY_M,
|
|
|
+ final_rise_delay.final_phase <<
|
|
|
+ MSDC_PAD_TUNE_CMDRDLY_S);
|
|
|
+ final_delay = final_rise_delay.final_phase;
|
|
|
+ } else {
|
|
|
+ setbits_le32(&host->base->msdc_iocon, MSDC_IOCON_RSPL);
|
|
|
+ clrsetbits_le32(tune_reg, MSDC_PAD_TUNE_CMDRDLY_M,
|
|
|
+ final_fall_delay.final_phase <<
|
|
|
+ MSDC_PAD_TUNE_CMDRDLY_S);
|
|
|
+ final_delay = final_fall_delay.final_phase;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (host->dev_comp->async_fifo || host->hs200_cmd_int_delay)
|
|
|
+ goto skip_internal;
|
|
|
+
|
|
|
+ for (i = 0; i < PAD_DELAY_MAX; i++) {
|
|
|
+ clrsetbits_le32(tune_reg, MSDC_PAD_TUNE_CMDRRDLY_M,
|
|
|
+ i << MSDC_PAD_TUNE_CMDRRDLY_S);
|
|
|
+
|
|
|
+ mmc_send_tuning(mmc, opcode, &cmd_err);
|
|
|
+ if (!cmd_err)
|
|
|
+ internal_delay |= (1 << i);
|
|
|
+ }
|
|
|
+
|
|
|
+ dev_err(dev, "Final internal delay: 0x%x\n", internal_delay);
|
|
|
+
|
|
|
+ internal_delay_phase = get_best_delay(host, internal_delay);
|
|
|
+ clrsetbits_le32(tune_reg, MSDC_PAD_TUNE_CMDRRDLY_M,
|
|
|
+ internal_delay_phase.final_phase <<
|
|
|
+ MSDC_PAD_TUNE_CMDRRDLY_S);
|
|
|
+
|
|
|
+skip_internal:
|
|
|
+ dev_err(dev, "Final cmd pad delay: %x\n", final_delay);
|
|
|
+ return final_delay == 0xff ? -EIO : 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_tune_data(struct udevice *dev, u32 opcode)
|
|
|
+{
|
|
|
+ struct msdc_plat *plat = dev_get_platdata(dev);
|
|
|
+ struct msdc_host *host = dev_get_priv(dev);
|
|
|
+ struct mmc *mmc = &plat->mmc;
|
|
|
+ u32 rise_delay = 0, fall_delay = 0;
|
|
|
+ struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0, };
|
|
|
+ u8 final_delay, final_maxlen;
|
|
|
+ void __iomem *tune_reg = &host->base->pad_tune;
|
|
|
+ int cmd_err;
|
|
|
+ int i, ret;
|
|
|
+
|
|
|
+ if (host->dev_comp->pad_tune0)
|
|
|
+ tune_reg = &host->base->pad_tune0;
|
|
|
+
|
|
|
+ clrbits_le32(&host->base->msdc_iocon, MSDC_IOCON_DSPL);
|
|
|
+ clrbits_le32(&host->base->msdc_iocon, MSDC_IOCON_W_DSPL);
|
|
|
+
|
|
|
+ for (i = 0; i < PAD_DELAY_MAX; i++) {
|
|
|
+ clrsetbits_le32(tune_reg, MSDC_PAD_TUNE_DATRRDLY_M,
|
|
|
+ i << MSDC_PAD_TUNE_DATRRDLY_S);
|
|
|
+
|
|
|
+ ret = mmc_send_tuning(mmc, opcode, &cmd_err);
|
|
|
+ if (!ret) {
|
|
|
+ rise_delay |= (1 << i);
|
|
|
+ } else if (cmd_err) {
|
|
|
+ /* in this case, retune response is needed */
|
|
|
+ ret = msdc_tune_response(dev, opcode);
|
|
|
+ if (ret)
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ final_rise_delay = get_best_delay(host, rise_delay);
|
|
|
+ if (final_rise_delay.maxlen >= 12 ||
|
|
|
+ (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
|
|
|
+ goto skip_fall;
|
|
|
+
|
|
|
+ setbits_le32(&host->base->msdc_iocon, MSDC_IOCON_DSPL);
|
|
|
+ setbits_le32(&host->base->msdc_iocon, MSDC_IOCON_W_DSPL);
|
|
|
+
|
|
|
+ for (i = 0; i < PAD_DELAY_MAX; i++) {
|
|
|
+ clrsetbits_le32(tune_reg, MSDC_PAD_TUNE_DATRRDLY_M,
|
|
|
+ i << MSDC_PAD_TUNE_DATRRDLY_S);
|
|
|
+
|
|
|
+ ret = mmc_send_tuning(mmc, opcode, &cmd_err);
|
|
|
+ if (!ret) {
|
|
|
+ fall_delay |= (1 << i);
|
|
|
+ } else if (cmd_err) {
|
|
|
+ /* in this case, retune response is needed */
|
|
|
+ ret = msdc_tune_response(dev, opcode);
|
|
|
+ if (ret)
|
|
|
+ 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_maxlen == final_rise_delay.maxlen) {
|
|
|
+ clrbits_le32(&host->base->msdc_iocon, MSDC_IOCON_DSPL);
|
|
|
+ clrbits_le32(&host->base->msdc_iocon, MSDC_IOCON_W_DSPL);
|
|
|
+ clrsetbits_le32(tune_reg, MSDC_PAD_TUNE_DATRRDLY_M,
|
|
|
+ final_rise_delay.final_phase <<
|
|
|
+ MSDC_PAD_TUNE_DATRRDLY_S);
|
|
|
+ final_delay = final_rise_delay.final_phase;
|
|
|
+ } else {
|
|
|
+ setbits_le32(&host->base->msdc_iocon, MSDC_IOCON_DSPL);
|
|
|
+ setbits_le32(&host->base->msdc_iocon, MSDC_IOCON_W_DSPL);
|
|
|
+ clrsetbits_le32(tune_reg, MSDC_PAD_TUNE_DATRRDLY_M,
|
|
|
+ final_fall_delay.final_phase <<
|
|
|
+ MSDC_PAD_TUNE_DATRRDLY_S);
|
|
|
+ final_delay = final_fall_delay.final_phase;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (mmc->selected_mode == MMC_HS_200 ||
|
|
|
+ mmc->selected_mode == UHS_SDR104)
|
|
|
+ clrsetbits_le32(tune_reg, MSDC_PAD_TUNE_DATWRDLY_M,
|
|
|
+ host->hs200_write_int_delay <<
|
|
|
+ MSDC_PAD_TUNE_DATWRDLY_S);
|
|
|
+
|
|
|
+ dev_err(dev, "Final data pad delay: %x\n", final_delay);
|
|
|
+
|
|
|
+ return final_delay == 0xff ? -EIO : 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_execute_tuning(struct udevice *dev, uint opcode)
|
|
|
+{
|
|
|
+ struct msdc_plat *plat = dev_get_platdata(dev);
|
|
|
+ struct msdc_host *host = dev_get_priv(dev);
|
|
|
+ struct mmc *mmc = &plat->mmc;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ if (mmc->selected_mode == MMC_HS_400) {
|
|
|
+ writel(host->hs400_ds_delay, &host->base->pad_ds_tune);
|
|
|
+ /* for hs400 mode it must be set to 0 */
|
|
|
+ clrbits_le32(&host->base->patch_bit2, MSDC_PB2_CFGCRCSTS);
|
|
|
+ host->hs400_mode = true;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = msdc_tune_response(dev, opcode);
|
|
|
+ if (ret == -EIO) {
|
|
|
+ dev_err(dev, "Tune response fail!\n");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!host->hs400_mode) {
|
|
|
+ ret = msdc_tune_data(dev, opcode);
|
|
|
+ if (ret == -EIO)
|
|
|
+ dev_err(dev, "Tune data fail!\n");
|
|
|
+ }
|
|
|
+
|
|
|
+ host->saved_tune_para.iocon = readl(&host->base->msdc_iocon);
|
|
|
+ host->saved_tune_para.pad_tune = readl(&host->base->pad_tune);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+#endif
|
|
|
+
|
|
|
+static void msdc_init_hw(struct msdc_host *host)
|
|
|
+{
|
|
|
+ u32 val;
|
|
|
+ void __iomem *tune_reg = &host->base->pad_tune;
|
|
|
+
|
|
|
+ if (host->dev_comp->pad_tune0)
|
|
|
+ tune_reg = &host->base->pad_tune0;
|
|
|
+
|
|
|
+ /* Configure to MMC/SD mode, clock free running */
|
|
|
+ setbits_le32(&host->base->msdc_cfg, MSDC_CFG_MODE);
|
|
|
+
|
|
|
+ /* Use PIO mode */
|
|
|
+ setbits_le32(&host->base->msdc_cfg, MSDC_CFG_PIO);
|
|
|
+
|
|
|
+ /* Reset */
|
|
|
+ msdc_reset_hw(host);
|
|
|
+
|
|
|
+ /* Enable/disable hw card detection according to fdt option */
|
|
|
+ if (host->builtin_cd)
|
|
|
+ clrsetbits_le32(&host->base->msdc_ps,
|
|
|
+ MSDC_PS_CDDBCE_M,
|
|
|
+ (DEFAULT_CD_DEBOUNCE << MSDC_PS_CDDBCE_S) |
|
|
|
+ MSDC_PS_CDEN);
|
|
|
+ else
|
|
|
+ clrbits_le32(&host->base->msdc_ps, MSDC_PS_CDEN);
|
|
|
+
|
|
|
+ /* Clear all interrupts */
|
|
|
+ val = readl(&host->base->msdc_int);
|
|
|
+ writel(val, &host->base->msdc_int);
|
|
|
+
|
|
|
+ /* Enable data & cmd interrupts */
|
|
|
+ writel(DATA_INTS_MASK | CMD_INTS_MASK, &host->base->msdc_inten);
|
|
|
+
|
|
|
+ writel(0, tune_reg);
|
|
|
+ writel(0, &host->base->msdc_iocon);
|
|
|
+
|
|
|
+ if (host->r_smpl)
|
|
|
+ setbits_le32(&host->base->msdc_iocon, MSDC_IOCON_RSPL);
|
|
|
+ else
|
|
|
+ clrbits_le32(&host->base->msdc_iocon, MSDC_IOCON_RSPL);
|
|
|
+
|
|
|
+ writel(0x403c0046, &host->base->patch_bit0);
|
|
|
+ writel(0xffff4089, &host->base->patch_bit1);
|
|
|
+
|
|
|
+ if (host->dev_comp->stop_clk_fix)
|
|
|
+ clrsetbits_le32(&host->base->patch_bit1, MSDC_PB1_STOP_DLY_M,
|
|
|
+ 3 << MSDC_PB1_STOP_DLY_S);
|
|
|
+
|
|
|
+ if (host->dev_comp->busy_check)
|
|
|
+ clrbits_le32(&host->base->patch_bit1, (1 << 7));
|
|
|
+
|
|
|
+ setbits_le32(&host->base->emmc50_cfg0, EMMC50_CFG_CFCSTS_SEL);
|
|
|
+
|
|
|
+ if (host->dev_comp->async_fifo) {
|
|
|
+ clrsetbits_le32(&host->base->patch_bit2, MSDC_PB2_RESPWAIT_M,
|
|
|
+ 3 << MSDC_PB2_RESPWAIT_S);
|
|
|
+
|
|
|
+ if (host->dev_comp->enhance_rx) {
|
|
|
+ setbits_le32(&host->base->sdc_adv_cfg0,
|
|
|
+ SDC_RX_ENHANCE_EN);
|
|
|
+ } else {
|
|
|
+ clrsetbits_le32(&host->base->patch_bit2,
|
|
|
+ MSDC_PB2_RESPSTSENSEL_M,
|
|
|
+ 2 << MSDC_PB2_RESPSTSENSEL_S);
|
|
|
+ clrsetbits_le32(&host->base->patch_bit2,
|
|
|
+ MSDC_PB2_CRCSTSENSEL_M,
|
|
|
+ 2 << MSDC_PB2_CRCSTSENSEL_S);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* use async fifo to avoid tune internal delay */
|
|
|
+ clrbits_le32(&host->base->patch_bit2,
|
|
|
+ MSDC_PB2_CFGRESP);
|
|
|
+ clrbits_le32(&host->base->patch_bit2,
|
|
|
+ MSDC_PB2_CFGCRCSTS);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (host->dev_comp->data_tune) {
|
|
|
+ setbits_le32(tune_reg,
|
|
|
+ MSDC_PAD_TUNE_RD_SEL | MSDC_PAD_TUNE_CMD_SEL);
|
|
|
+ clrsetbits_le32(&host->base->patch_bit0,
|
|
|
+ MSDC_INT_DAT_LATCH_CK_SEL_M,
|
|
|
+ host->latch_ck <<
|
|
|
+ MSDC_INT_DAT_LATCH_CK_SEL_S);
|
|
|
+ } else {
|
|
|
+ /* choose clock tune */
|
|
|
+ setbits_le32(tune_reg, MSDC_PAD_TUNE_RXDLYSEL);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Configure to enable SDIO mode otherwise sdio cmd5 won't work */
|
|
|
+ setbits_le32(&host->base->sdc_cfg, SDC_CFG_SDIO);
|
|
|
+
|
|
|
+ /* disable detecting SDIO device interrupt function */
|
|
|
+ clrbits_le32(&host->base->sdc_cfg, SDC_CFG_SDIOIDE);
|
|
|
+
|
|
|
+ /* Configure to default data timeout */
|
|
|
+ clrsetbits_le32(&host->base->sdc_cfg, SDC_CFG_DTOC_M,
|
|
|
+ 3 << SDC_CFG_DTOC_S);
|
|
|
+
|
|
|
+ if (host->dev_comp->stop_clk_fix) {
|
|
|
+ clrbits_le32(&host->base->sdc_fifo_cfg,
|
|
|
+ SDC_FIFO_CFG_WRVALIDSEL);
|
|
|
+ clrbits_le32(&host->base->sdc_fifo_cfg,
|
|
|
+ SDC_FIFO_CFG_RDVALIDSEL);
|
|
|
+ }
|
|
|
+
|
|
|
+ host->def_tune_para.iocon = readl(&host->base->msdc_iocon);
|
|
|
+ host->def_tune_para.pad_tune = readl(&host->base->pad_tune);
|
|
|
+}
|
|
|
+
|
|
|
+static void msdc_ungate_clock(struct msdc_host *host)
|
|
|
+{
|
|
|
+ clk_enable(&host->src_clk);
|
|
|
+ clk_enable(&host->h_clk);
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_drv_probe(struct udevice *dev)
|
|
|
+{
|
|
|
+ struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
|
|
|
+ struct msdc_plat *plat = dev_get_platdata(dev);
|
|
|
+ struct msdc_host *host = dev_get_priv(dev);
|
|
|
+ struct mmc_config *cfg = &plat->cfg;
|
|
|
+
|
|
|
+ cfg->name = dev->name;
|
|
|
+
|
|
|
+ host->dev_comp = (struct msdc_compatible *)dev_get_driver_data(dev);
|
|
|
+
|
|
|
+ host->src_clk_freq = clk_get_rate(&host->src_clk);
|
|
|
+
|
|
|
+ if (host->dev_comp->clk_div_bits == 8)
|
|
|
+ cfg->f_min = host->src_clk_freq / (4 * 255);
|
|
|
+ else
|
|
|
+ cfg->f_min = host->src_clk_freq / (4 * 4095);
|
|
|
+ cfg->f_max = host->src_clk_freq / 2;
|
|
|
+
|
|
|
+ cfg->b_max = 1024;
|
|
|
+ cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
|
|
|
+
|
|
|
+ host->mmc = &plat->mmc;
|
|
|
+ host->timeout_ns = 100000000;
|
|
|
+ host->timeout_clks = 3 * 1048576;
|
|
|
+
|
|
|
+#ifdef CONFIG_PINCTRL
|
|
|
+ pinctrl_select_state(dev, "default");
|
|
|
+#endif
|
|
|
+
|
|
|
+ msdc_ungate_clock(host);
|
|
|
+ msdc_init_hw(host);
|
|
|
+
|
|
|
+ upriv->mmc = &plat->mmc;
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_ofdata_to_platdata(struct udevice *dev)
|
|
|
+{
|
|
|
+ struct msdc_plat *plat = dev_get_platdata(dev);
|
|
|
+ struct msdc_host *host = dev_get_priv(dev);
|
|
|
+ struct mmc_config *cfg = &plat->cfg;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ host->base = (void *)dev_read_addr(dev);
|
|
|
+ if (!host->base)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ ret = mmc_of_parse(dev, cfg);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ ret = clk_get_by_name(dev, "source", &host->src_clk);
|
|
|
+ if (ret < 0)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ ret = clk_get_by_name(dev, "hclk", &host->h_clk);
|
|
|
+ if (ret < 0)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+#ifdef CONFIG_DM_GPIO
|
|
|
+ gpio_request_by_name(dev, "wp-gpios", 0, &host->gpio_wp, GPIOD_IS_IN);
|
|
|
+ gpio_request_by_name(dev, "cd-gpios", 0, &host->gpio_cd, GPIOD_IS_IN);
|
|
|
+#endif
|
|
|
+
|
|
|
+ host->hs400_ds_delay = dev_read_u32_default(dev, "hs400-ds-delay", 0);
|
|
|
+ host->hs200_cmd_int_delay =
|
|
|
+ dev_read_u32_default(dev, "cmd_int_delay", 0);
|
|
|
+ host->hs200_write_int_delay =
|
|
|
+ dev_read_u32_default(dev, "write_int_delay", 0);
|
|
|
+ host->latch_ck = dev_read_u32_default(dev, "latch-ck", 0);
|
|
|
+ host->r_smpl = dev_read_u32_default(dev, "r_smpl", 0);
|
|
|
+ host->builtin_cd = dev_read_u32_default(dev, "builtin-cd", 0);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int msdc_drv_bind(struct udevice *dev)
|
|
|
+{
|
|
|
+ struct msdc_plat *plat = dev_get_platdata(dev);
|
|
|
+
|
|
|
+ return mmc_bind(dev, &plat->mmc, &plat->cfg);
|
|
|
+}
|
|
|
+
|
|
|
+static const struct dm_mmc_ops msdc_ops = {
|
|
|
+ .send_cmd = msdc_ops_send_cmd,
|
|
|
+ .set_ios = msdc_ops_set_ios,
|
|
|
+ .get_cd = msdc_ops_get_cd,
|
|
|
+ .get_wp = msdc_ops_get_wp,
|
|
|
+#ifdef MMC_SUPPORTS_TUNING
|
|
|
+ .execute_tuning = msdc_execute_tuning,
|
|
|
+#endif
|
|
|
+};
|
|
|
+
|
|
|
+static const struct msdc_compatible mt7623_compat = {
|
|
|
+ .clk_div_bits = 12,
|
|
|
+ .pad_tune0 = true,
|
|
|
+ .async_fifo = true,
|
|
|
+ .data_tune = true,
|
|
|
+ .busy_check = false,
|
|
|
+ .stop_clk_fix = false,
|
|
|
+ .enhance_rx = false
|
|
|
+};
|
|
|
+
|
|
|
+static const struct udevice_id msdc_ids[] = {
|
|
|
+ { .compatible = "mediatek,mt7623-mmc", .data = (ulong)&mt7623_compat },
|
|
|
+ {}
|
|
|
+};
|
|
|
+
|
|
|
+U_BOOT_DRIVER(mtk_sd_drv) = {
|
|
|
+ .name = "mtk_sd",
|
|
|
+ .id = UCLASS_MMC,
|
|
|
+ .of_match = msdc_ids,
|
|
|
+ .ofdata_to_platdata = msdc_ofdata_to_platdata,
|
|
|
+ .bind = msdc_drv_bind,
|
|
|
+ .probe = msdc_drv_probe,
|
|
|
+ .ops = &msdc_ops,
|
|
|
+ .platdata_auto_alloc_size = sizeof(struct msdc_plat),
|
|
|
+ .priv_auto_alloc_size = sizeof(struct msdc_host),
|
|
|
+};
|