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From: Lucas Stach <dev@lynxeye.de>
To: barebox@lists.infradead.org
Subject: [PATCH v2 13/25] mci: tegra: apply pad autocalibration on T30
Date: Wed, 14 May 2014 22:45:40 +0200	[thread overview]
Message-ID: <1400100352-13002-13-git-send-email-dev@lynxeye.de> (raw)
In-Reply-To: <1400100352-13002-1-git-send-email-dev@lynxeye.de>

Needed for SD cards connected to sdmmc1 or sdmmc3
to work properly.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
---
 drivers/mci/tegra-sdmmc.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/mci/tegra-sdmmc.c b/drivers/mci/tegra-sdmmc.c
index 0ea0b5ca4a92..634515705f04 100644
--- a/drivers/mci/tegra-sdmmc.c
+++ b/drivers/mci/tegra-sdmmc.c
@@ -59,6 +59,14 @@
 #define TEGRA_SDMMC_INT_SIG_EN				0x038
 #define  TEGRA_SDMMC_INT_SIG_EN_XFER_COMPLETE		(1 << 1)
 
+#define TEGRA_SDMMC_SDMEMCOMPPADCTRL			0x1e0
+#define  TEGRA_SDMMC_SDMEMCOMPPADCTRL_VREF_SEL_SHIFT	0
+
+#define TEGRA_SDMMC_AUTO_CAL_CONFIG			0x1e4
+#define  TEGRA_SDMMC_AUTO_CAL_CONFIG_PU_OFFSET_SHIFT	0
+#define  TEGRA_SDMMC_AUTO_CAL_CONFIG_PD_OFFSET_SHIFT	8
+#define  TEGRA_SDMMC_AUTO_CAL_CONFIG_ENABLE		(1 << 29)
+
 struct tegra_sdmmc_host {
 	struct mci_host		mci;
 	void __iomem		*regs;
@@ -333,6 +341,23 @@ static int tegra_sdmmc_init(struct mci_host *mci, struct device_d *dev)
 	val |= TEGRA_SDMMC_PWR_CNTL_33_V | TEGRA_SDMMC_PWR_CNTL_SD_BUS;
 	writel(val, regs + TEGRA_SDMMC_PWR_CNTL);
 
+	/* sdmmc1 and sdmmc3 on T30 need a bit of padctrl init */
+	if (of_device_is_compatible(mci->hw_dev->device_node,
+			"nvidia,tegra30-sdhci") &&
+			((u32)regs == 0x78000000 || (u32)regs == 78000400)) {
+		val = readl(regs + TEGRA_SDMMC_SDMEMCOMPPADCTRL);
+		val &= 0xfffffff0;
+		val |= 0x7 << TEGRA_SDMMC_SDMEMCOMPPADCTRL_VREF_SEL_SHIFT;
+		writel(val, regs + TEGRA_SDMMC_SDMEMCOMPPADCTRL);
+
+		val = readl(regs + TEGRA_SDMMC_AUTO_CAL_CONFIG);
+		val &= 0xffff0000;
+		val |= (0x62 << TEGRA_SDMMC_AUTO_CAL_CONFIG_PU_OFFSET_SHIFT) |
+		       (0x70 << TEGRA_SDMMC_AUTO_CAL_CONFIG_PD_OFFSET_SHIFT) |
+		       TEGRA_SDMMC_AUTO_CAL_CONFIG_ENABLE;
+		writel(val, regs + TEGRA_SDMMC_AUTO_CAL_CONFIG);
+	}
+
 	/* setup signaling */
 	writel(0xffffffff, regs + TEGRA_SDMMC_INT_STAT_EN);
 	writel(0xffffffff, regs + TEGRA_SDMMC_INT_SIG_EN);
-- 
1.9.0


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  parent reply	other threads:[~2014-05-14 20:47 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-14 20:45 [PATCH v2 01/25] reset: add reset controller framework Lucas Stach
2014-05-14 20:45 ` [PATCH v2 02/25] tegra: lowlevel: add function to fetch chipid Lucas Stach
2014-05-14 20:45 ` [PATCH v2 03/25] reset: add tegra reset controller Lucas Stach
2014-05-14 20:45 ` [PATCH v2 04/25] clk: tegra: reset UARTS from clock controller Lucas Stach
2014-05-14 20:45 ` [PATCH v2 05/25] mci: tegra: add reset control Lucas Stach
2014-05-14 20:45 ` [PATCH v2 06/25] clk: tegra: remove device reset hack Lucas Stach
2014-05-14 20:45 ` [PATCH v2 07/25] clk: tegra: allow to register clocks with 16 bit divider Lucas Stach
2014-05-14 20:45 ` [PATCH v2 08/25] clk: tegra30: register i2c clocks Lucas Stach
2014-05-14 20:45 ` [PATCH v2 09/25] clk: tegra20: " Lucas Stach
2014-05-14 20:45 ` [PATCH v2 10/25] i2c: add Tegra driver Lucas Stach
2014-05-14 20:45 ` [PATCH v2 11/25] ARM: tegra: beaver: activate sdmmc1 voltage rail Lucas Stach
2014-05-14 20:45 ` [PATCH v2 12/25] ARM: tegra: beaver: adjust pinmux to make sdmmc1 work Lucas Stach
2014-05-14 20:45 ` Lucas Stach [this message]
2014-05-14 20:45 ` [PATCH v2 14/25] mci: tegra: don't set 8bit mode unconditionally Lucas Stach
2014-05-14 20:45 ` [PATCH v2 15/25] pinctrl: tegra30: parse drive groups Lucas Stach
2014-05-14 20:45 ` [PATCH v2 16/25] scripts: tegra: import cbootimage Lucas Stach
2014-05-14 20:45 ` [PATCH v2 17/25] tegra: cbootimage: remove noisy output Lucas Stach
2014-05-14 20:45 ` [PATCH v2 18/25] Makefile.lib: add rule to built Tegra BCTs Lucas Stach
2014-05-14 20:45 ` [PATCH v2 19/25] images: add Tegra20 image build rules Lucas Stach
2014-05-14 20:45 ` [PATCH v2 20/25] images: add Tegra30 " Lucas Stach
2014-05-14 20:45 ` [PATCH v2 21/25] ARM: boards: colibri t20: import BCT cfgs Lucas Stach
2014-05-14 20:45 ` [PATCH v2 22/25] images: tegra: build all Toradex Colibri images Lucas Stach
2014-05-14 20:45 ` [PATCH v2 23/25] ARM: boards: beaver: import BCT cfg Lucas Stach
2014-05-14 20:45 ` [PATCH v2 24/25] images: tegra: build NVidia Beaver image Lucas Stach
2014-05-14 20:45 ` [PATCH v2 25/25] images: tegra: rename ac100 image Lucas Stach

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