diff options
Diffstat (limited to 'drivers/mmc/host/mtk-sd.c')
| -rw-r--r-- | drivers/mmc/host/mtk-sd.c | 79 |
1 files changed, 77 insertions, 2 deletions
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index f611db05d1d9..b124cfee05a1 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -259,6 +259,7 @@ #define MSDC_PAD_TUNE_RD_SEL (0x1 << 13) /* RW */ #define MSDC_PAD_TUNE_CMD_SEL (0x1 << 21) /* RW */ +#define PAD_DS_TUNE_DLY_SEL (0x1 << 0) /* 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 */ @@ -302,6 +303,11 @@ #define PAD_CMD_RD_RXDLY_SEL (0x1 << 11) /* RW */ #define PAD_CMD_TX_DLY (0x1f << 12) /* RW */ +/* EMMC50_PAD_DS_TUNE mask */ +#define PAD_DS_DLY_SEL (0x1 << 16) /* RW */ +#define PAD_DS_DLY1 (0x1f << 10) /* RW */ +#define PAD_DS_DLY3 (0x1f << 0) /* RW */ + #define REQ_CMD_EIO (0x1 << 0) #define REQ_CMD_TMO (0x1 << 1) #define REQ_DAT_ERR (0x1 << 2) @@ -449,11 +455,13 @@ struct msdc_host { bool vqmmc_enabled; u32 latch_ck; u32 hs400_ds_delay; + u32 hs400_ds_dly3; 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 hs400_tuning; /* hs400 mode online tuning */ bool internal_cd; /* Use internal card-detect logic */ bool cqhci; /* support eMMC hw cmdq */ struct msdc_save_para save_para; /* used when gate HCLK */ @@ -1190,7 +1198,8 @@ static bool msdc_cmd_done(struct msdc_host *host, int events, 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)) + cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200 && + !host->hs400_tuning)) /* * should not clear fifo/interrupt as the tune data * may have alreay come when cmd19/cmd21 gets response @@ -1287,7 +1296,8 @@ static void msdc_cmd_next(struct msdc_host *host, if ((cmd->error && !(cmd->error == -EILSEQ && (cmd->opcode == MMC_SEND_TUNING_BLOCK || - cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200))) || + cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200 || + host->hs400_tuning))) || (mrq->sbc && mrq->sbc->error)) msdc_request_done(host, mrq); else if (cmd == mrq->sbc) @@ -2251,6 +2261,67 @@ static int msdc_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios) return 0; } +static int msdc_execute_hs400_tuning(struct mmc_host *mmc, struct mmc_card *card) +{ + struct msdc_host *host = mmc_priv(mmc); + struct msdc_delay_phase dly1_delay; + u32 val, result_dly1 = 0; + u8 *ext_csd; + int i, ret; + + if (host->top_base) { + sdr_set_bits(host->top_base + EMMC50_PAD_DS_TUNE, + PAD_DS_DLY_SEL); + if (host->hs400_ds_dly3) + sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE, + PAD_DS_DLY3, host->hs400_ds_dly3); + } else { + sdr_set_bits(host->base + PAD_DS_TUNE, PAD_DS_TUNE_DLY_SEL); + if (host->hs400_ds_dly3) + sdr_set_field(host->base + PAD_DS_TUNE, + PAD_DS_TUNE_DLY3, host->hs400_ds_dly3); + } + + host->hs400_tuning = true; + for (i = 0; i < PAD_DELAY_MAX; i++) { + if (host->top_base) + sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE, + PAD_DS_DLY1, i); + else + sdr_set_field(host->base + PAD_DS_TUNE, + PAD_DS_TUNE_DLY1, i); + ret = mmc_get_ext_csd(card, &ext_csd); + if (!ret) + result_dly1 |= (1 << i); + } + host->hs400_tuning = false; + + dly1_delay = get_best_delay(host, result_dly1); + if (dly1_delay.maxlen == 0) { + dev_err(host->dev, "Failed to get DLY1 delay!\n"); + goto fail; + } + if (host->top_base) + sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE, + PAD_DS_DLY1, dly1_delay.final_phase); + else + sdr_set_field(host->base + PAD_DS_TUNE, + PAD_DS_TUNE_DLY1, dly1_delay.final_phase); + + if (host->top_base) + val = readl(host->top_base + EMMC50_PAD_DS_TUNE); + else + val = readl(host->base + PAD_DS_TUNE); + + dev_info(host->dev, "Fianl PAD_DS_TUNE: 0x%x\n", val); + + return 0; + +fail: + dev_err(host->dev, "Failed to tuning DS pin delay!\n"); + return -EIO; +} + static void msdc_hw_reset(struct mmc_host *mmc) { struct msdc_host *host = mmc_priv(mmc); @@ -2381,6 +2452,7 @@ static const struct mmc_host_ops mt_msdc_ops = { .card_busy = msdc_card_busy, .execute_tuning = msdc_execute_tuning, .prepare_hs400_tuning = msdc_prepare_hs400_tuning, + .execute_hs400_tuning = msdc_execute_hs400_tuning, .hw_reset = msdc_hw_reset, }; @@ -2400,6 +2472,9 @@ static void msdc_of_property_parse(struct platform_device *pdev, of_property_read_u32(pdev->dev.of_node, "hs400-ds-delay", &host->hs400_ds_delay); + of_property_read_u32(pdev->dev.of_node, "mediatek,hs400-ds-dly3", + &host->hs400_ds_dly3); + of_property_read_u32(pdev->dev.of_node, "mediatek,hs200-cmd-int-delay", &host->hs200_cmd_int_delay); |