Re: [PATCH 5/6] mmc: mediatek: add MT8183 MMC driver support

From: Matthias Brugger
Date: Fri Oct 19 2018 - 05:04:13 EST

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On 13/10/2018 09:20, Chaotian Jing wrote:
> MT8183 puts the tune register at top layer, so need add new code
> to support it.
>
> Signed-off-by: Chaotian Jing <chaotian.jing@xxxxxxxxxxxx>
> ---
> drivers/mmc/host/mtk-sd.c | 283 ++++++++++++++++++++++++++++++++++++++--------
> 1 file changed, 233 insertions(+), 50 deletions(-)
>
> diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
> index 09d7e44..5b26f2f 100644
> --- a/drivers/mmc/host/mtk-sd.c
> +++ b/drivers/mmc/host/mtk-sd.c
> @@ -87,6 +87,13 @@
> #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 */
> /*--------------------------------------------------------------------------*/
>
> @@ -261,6 +268,23 @@
> #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)
> @@ -333,6 +357,9 @@ struct msdc_save_para {
> 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 {
> @@ -351,6 +378,8 @@ 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 {
> @@ -372,6 +401,7 @@ struct msdc_host {
> int error;
>
> void __iomem *base; /* host base address */
> + void __iomem *top_base; /* host top register base address */

Where do you assign a value to top_base?
I'm not familiar with the driver, but couldn't we reuse base and a flag for
example in mtk_mmc_compatible to check which tune register we need to use?

Regards,
Matthias

>
> struct msdc_dma dma; /* dma channel */
> u64 dma_mask;
> @@ -429,6 +459,18 @@ struct msdc_host {
> .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,
> @@ -468,6 +510,7 @@ struct msdc_host {
> 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},
> @@ -777,12 +820,28 @@ static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz)
> */
> if (host->mmc->actual_clock <= 52000000) {
> writel(host->def_tune_para.iocon, host->base + MSDC_IOCON);
> - writel(host->def_tune_para.pad_tune, host->base + tune_reg);
> + 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_tune, host->base + tune_reg);
> 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 &&
> @@ -1355,7 +1414,12 @@ static void msdc_init_hw(struct msdc_host *host)
> val = readl(host->base + MSDC_INT);
> writel(val, host->base + MSDC_INT);
>
> - writel(0, host->base + tune_reg);
> + 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);
> @@ -1379,8 +1443,12 @@ static void msdc_init_hw(struct msdc_host *host)
> sdr_set_field(host->base + MSDC_PATCH_BIT2,
> MSDC_PB2_RESPWAIT, 3);
> if (host->dev_comp->enhance_rx) {
> - sdr_set_bits(host->base + SDC_ADV_CFG0,
> - SDC_RX_ENHANCE_EN);
> + 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);
> @@ -1398,11 +1466,26 @@ static void msdc_init_hw(struct msdc_host *host)
> sdr_set_bits(host->base + MSDC_PATCH_BIT2,
> MSDC_PB2_SUPPORT_64G);
> if (host->dev_comp->data_tune) {
> - sdr_set_bits(host->base + tune_reg,
> - MSDC_PAD_TUNE_RD_SEL | MSDC_PAD_TUNE_CMD_SEL);
> + 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 */
> - sdr_set_bits(host->base + tune_reg, MSDC_PAD_TUNE_RXDLYSEL);
> + 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.
> @@ -1417,9 +1500,20 @@ static void msdc_init_hw(struct msdc_host *host)
> sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, 3);
>
> host->def_tune_para.iocon = readl(host->base + MSDC_IOCON);
> - host->def_tune_para.pad_tune = readl(host->base + tune_reg);
> host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
> - host->saved_tune_para.pad_tune = readl(host->base + tune_reg);
> + 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!");
> }
>
> @@ -1587,8 +1681,12 @@ static int msdc_tune_response(struct mmc_host *mmc, u32 opcode)
>
> sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
> for (i = 0 ; i < PAD_DELAY_MAX; i++) {
> - sdr_set_field(host->base + tune_reg,
> - MSDC_PAD_TUNE_CMDRDLY, i);
> + if (host->top_base)
> + sdr_set_field(host->top_base + EMMC_TOP_CMD,
> + PAD_CMD_RXDLY, i);
> + else
> + sdr_set_field(host->base + tune_reg,
> + MSDC_PAD_TUNE_CMDRDLY, i);
> /*
> * Using the same parameters, it may sometimes pass the test,
> * but sometimes it may fail. To make sure the parameters are
> @@ -1612,8 +1710,12 @@ static int msdc_tune_response(struct mmc_host *mmc, u32 opcode)
>
> sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
> for (i = 0; i < PAD_DELAY_MAX; i++) {
> - sdr_set_field(host->base + tune_reg,
> - MSDC_PAD_TUNE_CMDRDLY, i);
> + if (host->top_base)
> + sdr_set_field(host->top_base + EMMC_TOP_CMD,
> + PAD_CMD_RXDLY, i);
> + else
> + sdr_set_field(host->base + tune_reg,
> + MSDC_PAD_TUNE_CMDRDLY, i);
> /*
> * Using the same parameters, it may sometimes pass the test,
> * but sometimes it may fail. To make sure the parameters are
> @@ -1637,13 +1739,23 @@ static int msdc_tune_response(struct mmc_host *mmc, u32 opcode)
> final_maxlen = final_fall_delay.maxlen;
> if (final_maxlen == final_rise_delay.maxlen) {
> sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
> - sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY,
> - final_rise_delay.final_phase);
> + if (host->top_base)
> + sdr_set_field(host->base + EMMC_TOP_CMD, PAD_CMD_RXDLY,
> + final_rise_delay.final_phase);
> + else
> + sdr_set_field(host->base + tune_reg,
> + MSDC_PAD_TUNE_CMDRDLY,
> + final_rise_delay.final_phase);
> final_delay = final_rise_delay.final_phase;
> } else {
> sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
> - sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY,
> - final_fall_delay.final_phase);
> + if (host->top_base)
> + sdr_set_field(host->base + EMMC_TOP_CMD, PAD_CMD_RXDLY,
> + final_fall_delay.final_phase);
> + else
> + sdr_set_field(host->base + tune_reg,
> + MSDC_PAD_TUNE_CMDRDLY,
> + final_fall_delay.final_phase);
> final_delay = final_fall_delay.final_phase;
> }
> if (host->dev_comp->async_fifo || host->hs200_cmd_int_delay)
> @@ -1728,8 +1840,12 @@ static int msdc_tune_data(struct mmc_host *mmc, u32 opcode)
> 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++) {
> - sdr_set_field(host->base + tune_reg,
> - MSDC_PAD_TUNE_DATRRDLY, i);
> + if (host->top_base)
> + sdr_set_field(host->top_base + EMMC_TOP_CONTROL,
> + PAD_DAT_RD_RXDLY, i);
> + else
> + sdr_set_field(host->base + tune_reg,
> + MSDC_PAD_TUNE_DATRRDLY, i);
> ret = mmc_send_tuning(mmc, opcode, NULL);
> if (!ret)
> rise_delay |= (1 << i);
> @@ -1743,8 +1859,12 @@ static int msdc_tune_data(struct mmc_host *mmc, u32 opcode)
> 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++) {
> - sdr_set_field(host->base + tune_reg,
> - MSDC_PAD_TUNE_DATRRDLY, i);
> + if (host->top_base)
> + sdr_set_field(host->top_base + EMMC_TOP_CONTROL,
> + PAD_DAT_RD_RXDLY, i);
> + else
> + sdr_set_field(host->base + tune_reg,
> + MSDC_PAD_TUNE_DATRRDLY, i);
> ret = mmc_send_tuning(mmc, opcode, NULL);
> if (!ret)
> fall_delay |= (1 << i);
> @@ -1756,16 +1876,26 @@ static int msdc_tune_data(struct mmc_host *mmc, u32 opcode)
> 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);
> - sdr_set_field(host->base + tune_reg,
> - MSDC_PAD_TUNE_DATRRDLY,
> - final_rise_delay.final_phase);
> + if (host->top_base)
> + sdr_set_field(host->top_base + EMMC_TOP_CONTROL,
> + PAD_DAT_RD_RXDLY,
> + final_rise_delay.final_phase);
> + else
> + sdr_set_field(host->base + tune_reg,
> + MSDC_PAD_TUNE_DATRRDLY,
> + final_rise_delay.final_phase);
> 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);
> - sdr_set_field(host->base + tune_reg,
> - MSDC_PAD_TUNE_DATRRDLY,
> - final_fall_delay.final_phase);
> + if (host->top_base)
> + sdr_set_field(host->top_base + EMMC_TOP_CONTROL,
> + PAD_DAT_RD_RXDLY,
> + final_fall_delay.final_phase);
> + else
> + sdr_set_field(host->base + tune_reg,
> + MSDC_PAD_TUNE_DATRRDLY,
> + final_fall_delay.final_phase);
> final_delay = final_fall_delay.final_phase;
> }
>
> @@ -1793,10 +1923,17 @@ static int msdc_tune_together(struct mmc_host *mmc, u32 opcode)
> sdr_clr_bits(host->base + MSDC_IOCON,
> MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
> for (i = 0 ; i < PAD_DELAY_MAX; i++) {
> - sdr_set_field(host->base + tune_reg,
> - MSDC_PAD_TUNE_CMDRDLY, i);
> - sdr_set_field(host->base + tune_reg,
> - MSDC_PAD_TUNE_DATRRDLY, i);
> + if (host->top_base) {
> + sdr_set_field(host->top_base + EMMC_TOP_CMD,
> + PAD_CMD_RXDLY, i);
> + sdr_set_field(host->top_base + EMMC_TOP_CONTROL,
> + PAD_DAT_RD_RXDLY, i);
> + } else {
> + sdr_set_field(host->base + tune_reg,
> + MSDC_PAD_TUNE_CMDRDLY, i);
> + sdr_set_field(host->base + tune_reg,
> + MSDC_PAD_TUNE_DATRRDLY, i);
> + }
> ret = mmc_send_tuning(mmc, opcode, NULL);
> if (!ret)
> rise_delay |= (1 << i);
> @@ -1811,10 +1948,17 @@ static int msdc_tune_together(struct mmc_host *mmc, u32 opcode)
> sdr_set_bits(host->base + MSDC_IOCON,
> MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
> for (i = 0; i < PAD_DELAY_MAX; i++) {
> - sdr_set_field(host->base + tune_reg,
> - MSDC_PAD_TUNE_CMDRDLY, i);
> - sdr_set_field(host->base + tune_reg,
> - MSDC_PAD_TUNE_DATRRDLY, i);
> + if (host->top_base) {
> + sdr_set_field(host->top_base + EMMC_TOP_CMD,
> + PAD_CMD_RXDLY, i);
> + sdr_set_field(host->top_base + EMMC_TOP_CONTROL,
> + PAD_DAT_RD_RXDLY, i);
> + } else {
> + sdr_set_field(host->base + tune_reg,
> + MSDC_PAD_TUNE_CMDRDLY, i);
> + sdr_set_field(host->base + tune_reg,
> + MSDC_PAD_TUNE_DATRRDLY, i);
> + }
> ret = mmc_send_tuning(mmc, opcode, NULL);
> if (!ret)
> fall_delay |= (1 << i);
> @@ -1827,22 +1971,24 @@ static int msdc_tune_together(struct mmc_host *mmc, u32 opcode)
> sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
> sdr_clr_bits(host->base + MSDC_IOCON,
> MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
> - sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY,
> - final_rise_delay.final_phase);
> - sdr_set_field(host->base + tune_reg,
> - MSDC_PAD_TUNE_DATRRDLY,
> - final_rise_delay.final_phase);
> 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;
> + }
> +
> + if (host->top_base) {
> + sdr_set_field(host->top_base + EMMC_TOP_CMD,
> + PAD_CMD_RXDLY, final_delay);
> + sdr_set_field(host->top_base + EMMC_TOP_CONTROL,
> + PAD_DAT_RD_RXDLY, final_delay);
> + } else {
> sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY,
> - final_fall_delay.final_phase);
> + final_delay);
> sdr_set_field(host->base + tune_reg,
> - MSDC_PAD_TUNE_DATRRDLY,
> - final_fall_delay.final_phase);
> - final_delay = final_fall_delay.final_phase;
> + MSDC_PAD_TUNE_DATRRDLY, final_delay);
> }
>
> dev_dbg(host->dev, "Final pad delay: %x\n", final_delay);
> @@ -1860,8 +2006,12 @@ static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode)
> if (host->hs400_mode) {
> sdr_clr_bits(host->base + MSDC_IOCON,
> MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
> - sdr_set_field(host->base + tune_reg,
> - MSDC_PAD_TUNE_DATRRDLY, 0);
> + if (host->top_base)
> + sdr_set_field(host->top_base + EMMC_TOP_CONTROL,
> + PAD_DAT_RD_RXDLY, 0);
> + else
> + sdr_set_field(host->base + tune_reg,
> + MSDC_PAD_TUNE_DATRRDLY, 0);
> }
> goto tune_done;
> }
> @@ -1884,6 +2034,12 @@ static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode)
> 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;
> }
>
> @@ -1892,7 +2048,11 @@ 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;
>
> - writel(host->hs400_ds_delay, host->base + PAD_DS_TUNE);
> + 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 */
> @@ -1975,6 +2135,11 @@ static int msdc_drv_probe(struct platform_device *pdev)
> goto host_free;
> }
>
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> + 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;
> @@ -2143,7 +2308,6 @@ static void msdc_save_reg(struct msdc_host *host)
> 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.pad_tune = readl(host->base + tune_reg);
> 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);
> @@ -2152,6 +2316,16 @@ static void msdc_save_reg(struct msdc_host *host)
> 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)
> @@ -2161,7 +2335,6 @@ static void msdc_restore_reg(struct msdc_host *host)
> 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.pad_tune, host->base + tune_reg);
> 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);
> @@ -2170,6 +2343,16 @@ static void msdc_restore_reg(struct msdc_host *host)
> 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);
> + }
> }
>
> static int msdc_runtime_suspend(struct device *dev)
>

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