linux-kernel - [PATCH v2 5/6] mmc: f-sdh30: Add support for non-removable media

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Date:   Fri, 11 Nov 2022 17:10:32 +0900
From:   Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Jassi Brar <jaswinder.singh@...aro.org>,
        Ard Biesheuvel <ardb@...nel.org>, linux-mmc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Subject: [PATCH v2 5/6] mmc: f-sdh30: Add support for non-removable media

To use F_SDH30 for non-removable meda like eMMC,
need to enable FORCE_CARD_INSERT bit to skip the delay for detection.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Acked-by: Jassi Brar <jaswinder.singh@...aro.org>
---
 drivers/mmc/host/sdhci_f_sdh30.c | 7 +++++++
 drivers/mmc/host/sdhci_f_sdh30.h | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/drivers/mmc/host/sdhci_f_sdh30.c b/drivers/mmc/host/sdhci_f_sdh30.c
index 556f4601643d..afbe17312cb6 100644
--- a/drivers/mmc/host/sdhci_f_sdh30.c
+++ b/drivers/mmc/host/sdhci_f_sdh30.c
@@ -77,6 +77,13 @@ static void sdhci_f_sdh30_reset(struct sdhci_host *host, u8 mask)
 		ctl |= F_SDH30_CMD_DAT_DELAY;
 		sdhci_writel(host, ctl, F_SDH30_ESD_CONTROL);
 	}
+
+	if ((host->mmc->caps & MMC_CAP_NONREMOVABLE) &&
+	    !(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
+		ctl = sdhci_readl(host, F_SDH30_TEST);
+		ctl |= F_SDH30_FORCE_CARD_INSERT;
+		sdhci_writel(host, ctl, F_SDH30_TEST);
+	}
 }
 
 static const struct sdhci_ops sdhci_f_sdh30_ops = {
diff --git a/drivers/mmc/host/sdhci_f_sdh30.h b/drivers/mmc/host/sdhci_f_sdh30.h
index fc1ad28f7ca9..7c3c66291d42 100644
--- a/drivers/mmc/host/sdhci_f_sdh30.h
+++ b/drivers/mmc/host/sdhci_f_sdh30.h
@@ -29,4 +29,7 @@
 #define  F_SDH30_CMD_DAT_DELAY	BIT(9)
 #define	 F_SDH30_EMMC_HS200		BIT(24)
 
+#define F_SDH30_TEST		0x158
+#define F_SDH30_FORCE_CARD_INSERT	BIT(6)
+
 #define F_SDH30_MIN_CLOCK		400000
-- 
2.25.1