Upstream fix for WP detection on SD card
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|         Thu, 08 Aug 2019 15:25:43 -0700 (PDT) | ||||
| From: Dmitry Osipenko <digetx@gmail.com> | ||||
| To: Thierry Reding <thierry.reding@gmail.com>, | ||||
|         Jonathan Hunter <jonathanh@nvidia.com>, | ||||
|         Adrian Hunter <adrian.hunter@intel.com>, | ||||
|         Ulf Hansson <ulf.hansson@linaro.org> | ||||
| Cc: linux-mmc@vger.kernel.org, linux-tegra@vger.kernel.org, | ||||
|         linux-kernel@vger.kernel.org | ||||
| Subject: [PATCH v1] Revert "mmc: sdhci-tegra: drop ->get_ro() implementation" | ||||
| Date: Fri,  9 Aug 2019 01:24:30 +0300 | ||||
| Message-Id: <20190808222430.28477-1-digetx@gmail.com> | ||||
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| 
 | ||||
| The WRITE_PROTECT bit is always in a "protected mode" on Tegra and | ||||
| WP-GPIO state need to be used instead. In a case of the GPIO absence, | ||||
| write-enable should be assumed. External SD is writable once again as | ||||
| a result of this patch because the offending commit changed behaviour for | ||||
| the case of a missing WP-GPIO to fall back to WRITE_PROTECT bit-checking, | ||||
| which is incorrect for Tegra. | ||||
| 
 | ||||
| Cc: stable@vger.kernel.org # v5.1+ | ||||
| Fixes: e8391453e27f ("mmc: sdhci-tegra: drop ->get_ro() implementation") | ||||
| Signed-off-by: Dmitry Osipenko <digetx@gmail.com> | ||||
| Acked-by: Thierry Reding <treding@nvidia.com> | ||||
| Acked-by: Adrian Hunter <adrian.hunter@intel.com> | ||||
| ---
 | ||||
|  drivers/mmc/host/sdhci-tegra.c | 14 ++++++++++++++ | ||||
|  1 file changed, 14 insertions(+) | ||||
| 
 | ||||
| diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
 | ||||
| index f4d4761cf20a..02d8f524bb9e 100644
 | ||||
| --- a/drivers/mmc/host/sdhci-tegra.c
 | ||||
| +++ b/drivers/mmc/host/sdhci-tegra.c
 | ||||
| @@ -258,6 +258,16 @@ static void tegra210_sdhci_writew(struct sdhci_host *host, u16 val, int reg)
 | ||||
|  	} | ||||
|  } | ||||
|   | ||||
| +static unsigned int tegra_sdhci_get_ro(struct sdhci_host *host)
 | ||||
| +{
 | ||||
| +	/*
 | ||||
| +	 * Write-enable shall be assumed if GPIO is missing in a board's
 | ||||
| +	 * device-tree because SDHCI's WRITE_PROTECT bit doesn't work on
 | ||||
| +	 * Tegra.
 | ||||
| +	 */
 | ||||
| +	return mmc_gpio_get_ro(host->mmc);
 | ||||
| +}
 | ||||
| +
 | ||||
|  static bool tegra_sdhci_is_pad_and_regulator_valid(struct sdhci_host *host) | ||||
|  { | ||||
|  	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | ||||
| @@ -1224,6 +1234,7 @@ static const struct cqhci_host_ops sdhci_tegra_cqhci_ops = {
 | ||||
|  }; | ||||
|   | ||||
|  static const struct sdhci_ops tegra_sdhci_ops = { | ||||
| +	.get_ro     = tegra_sdhci_get_ro,
 | ||||
|  	.read_w     = tegra_sdhci_readw, | ||||
|  	.write_l    = tegra_sdhci_writel, | ||||
|  	.set_clock  = tegra_sdhci_set_clock, | ||||
| @@ -1279,6 +1290,7 @@ static const struct sdhci_tegra_soc_data soc_data_tegra30 = {
 | ||||
|  }; | ||||
|   | ||||
|  static const struct sdhci_ops tegra114_sdhci_ops = { | ||||
| +	.get_ro     = tegra_sdhci_get_ro,
 | ||||
|  	.read_w     = tegra_sdhci_readw, | ||||
|  	.write_w    = tegra_sdhci_writew, | ||||
|  	.write_l    = tegra_sdhci_writel, | ||||
| @@ -1332,6 +1344,7 @@ static const struct sdhci_tegra_soc_data soc_data_tegra124 = {
 | ||||
|  }; | ||||
|   | ||||
|  static const struct sdhci_ops tegra210_sdhci_ops = { | ||||
| +	.get_ro     = tegra_sdhci_get_ro,
 | ||||
|  	.read_w     = tegra_sdhci_readw, | ||||
|  	.write_w    = tegra210_sdhci_writew, | ||||
|  	.write_l    = tegra_sdhci_writel, | ||||
| @@ -1366,6 +1379,7 @@ static const struct sdhci_tegra_soc_data soc_data_tegra210 = {
 | ||||
|  }; | ||||
|   | ||||
|  static const struct sdhci_ops tegra186_sdhci_ops = { | ||||
| +	.get_ro     = tegra_sdhci_get_ro,
 | ||||
|  	.read_w     = tegra_sdhci_readw, | ||||
|  	.write_l    = tegra_sdhci_writel, | ||||
|  	.set_clock  = tegra_sdhci_set_clock, | ||||
| @ -1,32 +1,3 @@ | ||||
| From 005e0b987019fff6013dff99f44d9f6ce68f08ad Mon Sep 17 00:00:00 2001 | ||||
| From: Peter Robinson <pbrobinson@gmail.com> | ||||
| Date: Sat, 23 Mar 2019 17:42:18 +0000 | ||||
| Subject: [PATCH 1/3] arm64: tegra210: Jetson TX1: disable WP to make SD card | ||||
|  work | ||||
| 
 | ||||
| There's some issue with Write Protect detection on the Jetson TX1 | ||||
| so just apply a quirk to disable the check for the time being. | ||||
| 
 | ||||
| Signed-off-by: Peter Robinson <pbrobinson@gmail.com> | ||||
| ---
 | ||||
|  arch/arm64/boot/dts/nvidia/tegra210-p2597.dtsi | 1 + | ||||
|  1 file changed, 1 insertion(+) | ||||
| 
 | ||||
| diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p2597.dtsi b/arch/arm64/boot/dts/nvidia/tegra210-p2597.dtsi
 | ||||
| index a96e6ee70c21..072788646cbf 100644
 | ||||
| --- a/arch/arm64/boot/dts/nvidia/tegra210-p2597.dtsi
 | ||||
| +++ b/arch/arm64/boot/dts/nvidia/tegra210-p2597.dtsi
 | ||||
| @@ -1456,6 +1456,7 @@
 | ||||
|  	sdhci@700b0000 { | ||||
|  		status = "okay"; | ||||
|  		bus-width = <4>; | ||||
| +		disable-wp;
 | ||||
|   | ||||
|  		cd-gpios = <&gpio TEGRA_GPIO(Z, 1) GPIO_ACTIVE_LOW>; | ||||
|   | ||||
| -- 
 | ||||
| 2.20.1 | ||||
| 
 | ||||
| From aea4a7a551fd7342299d34f04a8b75f58644ac07 Mon Sep 17 00:00:00 2001 | ||||
| From: Peter Robinson <pbrobinson@gmail.com> | ||||
| Date: Sat, 23 Mar 2019 17:45:10 +0000 | ||||
|  | ||||
| @ -558,6 +558,8 @@ Patch306: arm-sdhci-esdhc-imx-fixes.patch | ||||
| Patch320: arm64-tegra-jetson-tx1-fixes.patch | ||||
| # https://www.spinics.net/lists/linux-tegra/msg43110.html | ||||
| Patch321: arm64-tegra-Jetson-TX2-Allow-bootloader-to-configure.patch | ||||
| # https://patchwork.kernel.org/patch/11084925/ | ||||
| Patch322: arm64-Revert-mmc-sdhci-tegra-drop---get_ro-implementation.patch | ||||
| 
 | ||||
| # 400 - IBM (ppc/s390x) patches | ||||
| 
 | ||||
|  | ||||
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