Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 596 insertions, 0 deletions

diff --git a/drivers/ata/ahci_tegra.c b/drivers/ata/ahci_tegra.c
new file mode 100644
index 000000000..004f26088
--- /dev/null
+++ b/drivers/ata/ahci_tegra.c
@@ -0,0 +1,596 @@
+/*
+ * drivers/ata/ahci_tegra.c
+ *
+ * Copyright (c) 2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Author:
+ *	Mikko Perttunen <mperttunen@nvidia.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/ahci_platform.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/reset.h>
+
+#include <soc/tegra/fuse.h>
+#include <soc/tegra/pmc.h>
+
+#include "ahci.h"
+
+#define DRV_NAME "tegra-ahci"
+
+#define SATA_CONFIGURATION_0				0x180
+#define SATA_CONFIGURATION_0_EN_FPCI			BIT(0)
+#define SATA_CONFIGURATION_0_CLK_OVERRIDE			BIT(31)
+
+#define SCFG_OFFSET					0x1000
+
+#define T_SATA0_CFG_1					0x04
+#define T_SATA0_CFG_1_IO_SPACE				BIT(0)
+#define T_SATA0_CFG_1_MEMORY_SPACE			BIT(1)
+#define T_SATA0_CFG_1_BUS_MASTER			BIT(2)
+#define T_SATA0_CFG_1_SERR				BIT(8)
+
+#define T_SATA0_CFG_9					0x24
+#define T_SATA0_CFG_9_BASE_ADDRESS			0x40020000
+
+#define SATA_FPCI_BAR5					0x94
+#define SATA_FPCI_BAR5_START_MASK			(0xfffffff << 4)
+#define SATA_FPCI_BAR5_START				(0x0040020 << 4)
+#define SATA_FPCI_BAR5_ACCESS_TYPE			(0x1)
+
+#define SATA_INTR_MASK					0x188
+#define SATA_INTR_MASK_IP_INT_MASK			BIT(16)
+
+#define T_SATA0_CFG_35					0x94
+#define T_SATA0_CFG_35_IDP_INDEX_MASK			(0x7ff << 2)
+#define T_SATA0_CFG_35_IDP_INDEX			(0x2a << 2)
+
+#define T_SATA0_AHCI_IDP1				0x98
+#define T_SATA0_AHCI_IDP1_DATA				(0x400040)
+
+#define T_SATA0_CFG_PHY_1				0x12c
+#define T_SATA0_CFG_PHY_1_PADS_IDDQ_EN			BIT(23)
+#define T_SATA0_CFG_PHY_1_PAD_PLL_IDDQ_EN		BIT(22)
+
+#define T_SATA0_NVOOB                                   0x114
+#define T_SATA0_NVOOB_COMMA_CNT_MASK                    (0xff << 16)
+#define T_SATA0_NVOOB_COMMA_CNT                         (0x07 << 16)
+#define T_SATA0_NVOOB_SQUELCH_FILTER_MODE_MASK          (0x3 << 24)
+#define T_SATA0_NVOOB_SQUELCH_FILTER_MODE               (0x1 << 24)
+#define T_SATA0_NVOOB_SQUELCH_FILTER_LENGTH_MASK        (0x3 << 26)
+#define T_SATA0_NVOOB_SQUELCH_FILTER_LENGTH             (0x3 << 26)
+
+#define T_SATA_CFG_PHY_0                                0x120
+#define T_SATA_CFG_PHY_0_USE_7BIT_ALIGN_DET_FOR_SPD     BIT(11)
+#define T_SATA_CFG_PHY_0_MASK_SQUELCH                   BIT(24)
+
+#define T_SATA0_CFG2NVOOB_2				0x134
+#define T_SATA0_CFG2NVOOB_2_COMWAKE_IDLE_CNT_LOW_MASK	(0x1ff << 18)
+#define T_SATA0_CFG2NVOOB_2_COMWAKE_IDLE_CNT_LOW	(0xc << 18)
+
+#define T_SATA0_AHCI_HBA_CAP_BKDR			0x300
+#define T_SATA0_AHCI_HBA_CAP_BKDR_PARTIAL_ST_CAP	BIT(13)
+#define T_SATA0_AHCI_HBA_CAP_BKDR_SLUMBER_ST_CAP	BIT(14)
+#define T_SATA0_AHCI_HBA_CAP_BKDR_SALP			BIT(26)
+#define T_SATA0_AHCI_HBA_CAP_BKDR_SUPP_PM		BIT(17)
+#define T_SATA0_AHCI_HBA_CAP_BKDR_SNCQ			BIT(30)
+
+#define T_SATA0_BKDOOR_CC				0x4a4
+#define T_SATA0_BKDOOR_CC_CLASS_CODE_MASK		(0xffff << 16)
+#define T_SATA0_BKDOOR_CC_CLASS_CODE			(0x0106 << 16)
+#define T_SATA0_BKDOOR_CC_PROG_IF_MASK			(0xff << 8)
+#define T_SATA0_BKDOOR_CC_PROG_IF			(0x01 << 8)
+
+#define T_SATA0_CFG_SATA				0x54c
+#define T_SATA0_CFG_SATA_BACKDOOR_PROG_IF_EN		BIT(12)
+
+#define T_SATA0_CFG_MISC				0x550
+
+#define T_SATA0_INDEX					0x680
+
+#define T_SATA0_CHX_PHY_CTRL1_GEN1			0x690
+#define T_SATA0_CHX_PHY_CTRL1_GEN1_TX_AMP_MASK		0xff
+#define T_SATA0_CHX_PHY_CTRL1_GEN1_TX_AMP_SHIFT		0
+#define T_SATA0_CHX_PHY_CTRL1_GEN1_TX_PEAK_MASK		(0xff << 8)
+#define T_SATA0_CHX_PHY_CTRL1_GEN1_TX_PEAK_SHIFT	8
+
+#define T_SATA0_CHX_PHY_CTRL1_GEN2			0x694
+#define T_SATA0_CHX_PHY_CTRL1_GEN2_TX_AMP_MASK		0xff
+#define T_SATA0_CHX_PHY_CTRL1_GEN2_TX_AMP_SHIFT		0
+#define T_SATA0_CHX_PHY_CTRL1_GEN2_TX_PEAK_MASK		(0xff << 12)
+#define T_SATA0_CHX_PHY_CTRL1_GEN2_TX_PEAK_SHIFT	12
+
+#define T_SATA0_CHX_PHY_CTRL2				0x69c
+#define T_SATA0_CHX_PHY_CTRL2_CDR_CNTL_GEN1		0x23
+
+#define T_SATA0_CHX_PHY_CTRL11				0x6d0
+#define T_SATA0_CHX_PHY_CTRL11_GEN2_RX_EQ		(0x2800 << 16)
+
+#define T_SATA0_CHX_PHY_CTRL17_0			0x6e8
+#define T_SATA0_CHX_PHY_CTRL17_0_RX_EQ_CTRL_L_GEN1	0x55010000
+#define T_SATA0_CHX_PHY_CTRL18_0			0x6ec
+#define T_SATA0_CHX_PHY_CTRL18_0_RX_EQ_CTRL_L_GEN2	0x55010000
+#define T_SATA0_CHX_PHY_CTRL20_0			0x6f4
+#define T_SATA0_CHX_PHY_CTRL20_0_RX_EQ_CTRL_H_GEN1	0x1
+#define T_SATA0_CHX_PHY_CTRL21_0			0x6f8
+#define T_SATA0_CHX_PHY_CTRL21_0_RX_EQ_CTRL_H_GEN2	0x1
+
+/* AUX Registers */
+#define SATA_AUX_MISC_CNTL_1_0				0x8
+#define SATA_AUX_MISC_CNTL_1_0_DEVSLP_OVERRIDE		BIT(17)
+#define SATA_AUX_MISC_CNTL_1_0_SDS_SUPPORT		BIT(13)
+#define SATA_AUX_MISC_CNTL_1_0_DESO_SUPPORT		BIT(15)
+
+#define SATA_AUX_RX_STAT_INT_0				0xc
+#define SATA_AUX_RX_STAT_INT_0_SATA_DEVSLP		BIT(7)
+
+#define SATA_AUX_SPARE_CFG0_0				0x18
+#define SATA_AUX_SPARE_CFG0_0_MDAT_TIMER_AFTER_PG_VALID	BIT(14)
+
+#define FUSE_SATA_CALIB					0x124
+#define FUSE_SATA_CALIB_MASK				0x3
+
+struct sata_pad_calibration {
+	u8 gen1_tx_amp;
+	u8 gen1_tx_peak;
+	u8 gen2_tx_amp;
+	u8 gen2_tx_peak;
+};
+
+static const struct sata_pad_calibration tegra124_pad_calibration[] = {
+	{0x18, 0x04, 0x18, 0x0a},
+	{0x0e, 0x04, 0x14, 0x0a},
+	{0x0e, 0x07, 0x1a, 0x0e},
+	{0x14, 0x0e, 0x1a, 0x0e},
+};
+
+struct tegra_ahci_ops {
+	int (*init)(struct ahci_host_priv *hpriv);
+};
+
+struct tegra_ahci_soc {
+	const char *const		*supply_names;
+	u32				num_supplies;
+	bool				supports_devslp;
+	const struct tegra_ahci_ops	*ops;
+};
+
+struct tegra_ahci_priv {
+	struct platform_device	   *pdev;
+	void __iomem		   *sata_regs;
+	void __iomem		   *sata_aux_regs;
+	struct reset_control	   *sata_rst;
+	struct reset_control	   *sata_oob_rst;
+	struct reset_control	   *sata_cold_rst;
+	/* Needs special handling, cannot use ahci_platform */
+	struct clk		   *sata_clk;
+	struct regulator_bulk_data *supplies;
+	const struct tegra_ahci_soc *soc;
+};
+
+static void tegra_ahci_handle_quirks(struct ahci_host_priv *hpriv)
+{
+	struct tegra_ahci_priv *tegra = hpriv->plat_data;
+	u32 val;
+
+	if (tegra->sata_aux_regs && !tegra->soc->supports_devslp) {
+		val = readl(tegra->sata_aux_regs + SATA_AUX_MISC_CNTL_1_0);
+		val &= ~SATA_AUX_MISC_CNTL_1_0_SDS_SUPPORT;
+		writel(val, tegra->sata_aux_regs + SATA_AUX_MISC_CNTL_1_0);
+	}
+}
+
+static int tegra124_ahci_init(struct ahci_host_priv *hpriv)
+{
+	struct tegra_ahci_priv *tegra = hpriv->plat_data;
+	struct sata_pad_calibration calib;
+	int ret;
+	u32 val;
+
+	/* Pad calibration */
+	ret = tegra_fuse_readl(FUSE_SATA_CALIB, &val);
+	if (ret)
+		return ret;
+
+	calib = tegra124_pad_calibration[val & FUSE_SATA_CALIB_MASK];
+
+	writel(BIT(0), tegra->sata_regs + SCFG_OFFSET + T_SATA0_INDEX);
+
+	val = readl(tegra->sata_regs +
+		    SCFG_OFFSET + T_SATA0_CHX_PHY_CTRL1_GEN1);
+	val &= ~T_SATA0_CHX_PHY_CTRL1_GEN1_TX_AMP_MASK;
+	val &= ~T_SATA0_CHX_PHY_CTRL1_GEN1_TX_PEAK_MASK;
+	val |= calib.gen1_tx_amp << T_SATA0_CHX_PHY_CTRL1_GEN1_TX_AMP_SHIFT;
+	val |= calib.gen1_tx_peak << T_SATA0_CHX_PHY_CTRL1_GEN1_TX_PEAK_SHIFT;
+	writel(val, tegra->sata_regs + SCFG_OFFSET +
+	       T_SATA0_CHX_PHY_CTRL1_GEN1);
+
+	val = readl(tegra->sata_regs +
+		    SCFG_OFFSET + T_SATA0_CHX_PHY_CTRL1_GEN2);
+	val &= ~T_SATA0_CHX_PHY_CTRL1_GEN2_TX_AMP_MASK;
+	val &= ~T_SATA0_CHX_PHY_CTRL1_GEN2_TX_PEAK_MASK;
+	val |= calib.gen2_tx_amp << T_SATA0_CHX_PHY_CTRL1_GEN1_TX_AMP_SHIFT;
+	val |= calib.gen2_tx_peak << T_SATA0_CHX_PHY_CTRL1_GEN1_TX_PEAK_SHIFT;
+	writel(val, tegra->sata_regs + SCFG_OFFSET +
+	       T_SATA0_CHX_PHY_CTRL1_GEN2);
+
+	writel(T_SATA0_CHX_PHY_CTRL11_GEN2_RX_EQ,
+	       tegra->sata_regs + SCFG_OFFSET + T_SATA0_CHX_PHY_CTRL11);
+	writel(T_SATA0_CHX_PHY_CTRL2_CDR_CNTL_GEN1,
+	       tegra->sata_regs + SCFG_OFFSET + T_SATA0_CHX_PHY_CTRL2);
+
+	writel(0, tegra->sata_regs + SCFG_OFFSET + T_SATA0_INDEX);
+
+	return 0;
+}
+
+static int tegra_ahci_power_on(struct ahci_host_priv *hpriv)
+{
+	struct tegra_ahci_priv *tegra = hpriv->plat_data;
+	int ret;
+
+	ret = regulator_bulk_enable(tegra->soc->num_supplies,
+				    tegra->supplies);
+	if (ret)
+		return ret;
+
+	ret = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_SATA,
+						tegra->sata_clk,
+						tegra->sata_rst);
+	if (ret)
+		goto disable_regulators;
+
+	reset_control_assert(tegra->sata_oob_rst);
+	reset_control_assert(tegra->sata_cold_rst);
+
+	ret = ahci_platform_enable_resources(hpriv);
+	if (ret)
+		goto disable_power;
+
+	reset_control_deassert(tegra->sata_cold_rst);
+	reset_control_deassert(tegra->sata_oob_rst);
+
+	return 0;
+
+disable_power:
+	clk_disable_unprepare(tegra->sata_clk);
+
+	tegra_powergate_power_off(TEGRA_POWERGATE_SATA);
+
+disable_regulators:
+	regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
+
+	return ret;
+}
+
+static void tegra_ahci_power_off(struct ahci_host_priv *hpriv)
+{
+	struct tegra_ahci_priv *tegra = hpriv->plat_data;
+
+	ahci_platform_disable_resources(hpriv);
+
+	reset_control_assert(tegra->sata_rst);
+	reset_control_assert(tegra->sata_oob_rst);
+	reset_control_assert(tegra->sata_cold_rst);
+
+	clk_disable_unprepare(tegra->sata_clk);
+	tegra_powergate_power_off(TEGRA_POWERGATE_SATA);
+
+	regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
+}
+
+static int tegra_ahci_controller_init(struct ahci_host_priv *hpriv)
+{
+	struct tegra_ahci_priv *tegra = hpriv->plat_data;
+	int ret;
+	u32 val;
+
+	ret = tegra_ahci_power_on(hpriv);
+	if (ret) {
+		dev_err(&tegra->pdev->dev,
+			"failed to power on AHCI controller: %d\n", ret);
+		return ret;
+	}
+
+	/*
+	 * Program the following SATA IPFS registers to allow SW accesses to
+	 * SATA's MMIO register range.
+	 */
+	val = readl(tegra->sata_regs + SATA_FPCI_BAR5);
+	val &= ~(SATA_FPCI_BAR5_START_MASK | SATA_FPCI_BAR5_ACCESS_TYPE);
+	val |= SATA_FPCI_BAR5_START | SATA_FPCI_BAR5_ACCESS_TYPE;
+	writel(val, tegra->sata_regs + SATA_FPCI_BAR5);
+
+	/* Program the following SATA IPFS register to enable the SATA */
+	val = readl(tegra->sata_regs + SATA_CONFIGURATION_0);
+	val |= SATA_CONFIGURATION_0_EN_FPCI;
+	writel(val, tegra->sata_regs + SATA_CONFIGURATION_0);
+
+	/* Electrical settings for better link stability */
+	val = T_SATA0_CHX_PHY_CTRL17_0_RX_EQ_CTRL_L_GEN1;
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CHX_PHY_CTRL17_0);
+	val = T_SATA0_CHX_PHY_CTRL18_0_RX_EQ_CTRL_L_GEN2;
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CHX_PHY_CTRL18_0);
+	val = T_SATA0_CHX_PHY_CTRL20_0_RX_EQ_CTRL_H_GEN1;
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CHX_PHY_CTRL20_0);
+	val = T_SATA0_CHX_PHY_CTRL21_0_RX_EQ_CTRL_H_GEN2;
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CHX_PHY_CTRL21_0);
+
+	/* For SQUELCH Filter & Gen3 drive getting detected as Gen1 drive */
+
+	val = readl(tegra->sata_regs + SCFG_OFFSET + T_SATA_CFG_PHY_0);
+	val |= T_SATA_CFG_PHY_0_MASK_SQUELCH;
+	val &= ~T_SATA_CFG_PHY_0_USE_7BIT_ALIGN_DET_FOR_SPD;
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA_CFG_PHY_0);
+
+	val = readl(tegra->sata_regs + SCFG_OFFSET + T_SATA0_NVOOB);
+	val &= ~(T_SATA0_NVOOB_COMMA_CNT_MASK |
+		 T_SATA0_NVOOB_SQUELCH_FILTER_LENGTH_MASK |
+		 T_SATA0_NVOOB_SQUELCH_FILTER_MODE_MASK);
+	val |= (T_SATA0_NVOOB_COMMA_CNT |
+		T_SATA0_NVOOB_SQUELCH_FILTER_LENGTH |
+		T_SATA0_NVOOB_SQUELCH_FILTER_MODE);
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_NVOOB);
+
+	/*
+	 * Change CFG2NVOOB_2_COMWAKE_IDLE_CNT_LOW from 83.3 ns to 58.8ns
+	 */
+	val = readl(tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG2NVOOB_2);
+	val &= ~T_SATA0_CFG2NVOOB_2_COMWAKE_IDLE_CNT_LOW_MASK;
+	val |= T_SATA0_CFG2NVOOB_2_COMWAKE_IDLE_CNT_LOW;
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG2NVOOB_2);
+
+	if (tegra->soc->ops && tegra->soc->ops->init)
+		tegra->soc->ops->init(hpriv);
+
+	/*
+	 * Program the following SATA configuration registers to
+	 * initialize SATA
+	 */
+	val = readl(tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_1);
+	val |= (T_SATA0_CFG_1_IO_SPACE | T_SATA0_CFG_1_MEMORY_SPACE |
+		T_SATA0_CFG_1_BUS_MASTER | T_SATA0_CFG_1_SERR);
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_1);
+	val = T_SATA0_CFG_9_BASE_ADDRESS;
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_9);
+
+	/* Program Class Code and Programming interface for SATA */
+	val = readl(tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_SATA);
+	val |= T_SATA0_CFG_SATA_BACKDOOR_PROG_IF_EN;
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_SATA);
+
+	val = readl(tegra->sata_regs + SCFG_OFFSET + T_SATA0_BKDOOR_CC);
+	val &=
+	    ~(T_SATA0_BKDOOR_CC_CLASS_CODE_MASK |
+	      T_SATA0_BKDOOR_CC_PROG_IF_MASK);
+	val |= T_SATA0_BKDOOR_CC_CLASS_CODE | T_SATA0_BKDOOR_CC_PROG_IF;
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_BKDOOR_CC);
+
+	val = readl(tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_SATA);
+	val &= ~T_SATA0_CFG_SATA_BACKDOOR_PROG_IF_EN;
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_SATA);
+
+	/* Enabling LPM capabilities through Backdoor Programming */
+	val = readl(tegra->sata_regs + SCFG_OFFSET + T_SATA0_AHCI_HBA_CAP_BKDR);
+	val |= (T_SATA0_AHCI_HBA_CAP_BKDR_PARTIAL_ST_CAP |
+		T_SATA0_AHCI_HBA_CAP_BKDR_SLUMBER_ST_CAP |
+		T_SATA0_AHCI_HBA_CAP_BKDR_SALP |
+		T_SATA0_AHCI_HBA_CAP_BKDR_SUPP_PM);
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_AHCI_HBA_CAP_BKDR);
+
+	/* SATA Second Level Clock Gating configuration
+	 * Enabling Gating of Tx/Rx clocks and driving Pad IDDQ and Lane
+	 * IDDQ Signals
+	 */
+	val = readl(tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_35);
+	val &= ~T_SATA0_CFG_35_IDP_INDEX_MASK;
+	val |= T_SATA0_CFG_35_IDP_INDEX;
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_35);
+
+	val = T_SATA0_AHCI_IDP1_DATA;
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_AHCI_IDP1);
+
+	val = readl(tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_PHY_1);
+	val |= (T_SATA0_CFG_PHY_1_PADS_IDDQ_EN |
+		T_SATA0_CFG_PHY_1_PAD_PLL_IDDQ_EN);
+	writel(val, tegra->sata_regs + SCFG_OFFSET + T_SATA0_CFG_PHY_1);
+
+	/* Enabling IPFS Clock Gating */
+	val = readl(tegra->sata_regs + SATA_CONFIGURATION_0);
+	val &= ~SATA_CONFIGURATION_0_CLK_OVERRIDE;
+	writel(val, tegra->sata_regs + SATA_CONFIGURATION_0);
+
+	tegra_ahci_handle_quirks(hpriv);
+
+	/* Unmask SATA interrupts */
+
+	val = readl(tegra->sata_regs + SATA_INTR_MASK);
+	val |= SATA_INTR_MASK_IP_INT_MASK;
+	writel(val, tegra->sata_regs + SATA_INTR_MASK);
+
+	return 0;
+}
+
+static void tegra_ahci_controller_deinit(struct ahci_host_priv *hpriv)
+{
+	tegra_ahci_power_off(hpriv);
+}
+
+static void tegra_ahci_host_stop(struct ata_host *host)
+{
+	struct ahci_host_priv *hpriv = host->private_data;
+
+	tegra_ahci_controller_deinit(hpriv);
+}
+
+static struct ata_port_operations ahci_tegra_port_ops = {
+	.inherits	= &ahci_ops,
+	.host_stop	= tegra_ahci_host_stop,
+};
+
+static const struct ata_port_info ahci_tegra_port_info = {
+	.flags		= AHCI_FLAG_COMMON | ATA_FLAG_NO_DIPM,
+	.pio_mask	= ATA_PIO4,
+	.udma_mask	= ATA_UDMA6,
+	.port_ops	= &ahci_tegra_port_ops,
+};
+
+static const char *const tegra124_supply_names[] = {
+	"avdd", "hvdd", "vddio", "target-5v", "target-12v"
+};
+
+static const struct tegra_ahci_ops tegra124_ahci_ops = {
+	.init = tegra124_ahci_init,
+};
+
+static const struct tegra_ahci_soc tegra124_ahci_soc = {
+	.supply_names = tegra124_supply_names,
+	.num_supplies = ARRAY_SIZE(tegra124_supply_names),
+	.supports_devslp = false,
+	.ops = &tegra124_ahci_ops,
+};
+
+static const struct tegra_ahci_soc tegra210_ahci_soc = {
+	.supports_devslp = false,
+};
+
+static const struct of_device_id tegra_ahci_of_match[] = {
+	{
+		.compatible = "nvidia,tegra124-ahci",
+		.data = &tegra124_ahci_soc
+	},
+	{
+		.compatible = "nvidia,tegra210-ahci",
+		.data = &tegra210_ahci_soc
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, tegra_ahci_of_match);
+
+static struct scsi_host_template ahci_platform_sht = {
+	AHCI_SHT(DRV_NAME),
+};
+
+static int tegra_ahci_probe(struct platform_device *pdev)
+{
+	struct ahci_host_priv *hpriv;
+	struct tegra_ahci_priv *tegra;
+	struct resource *res;
+	int ret;
+	unsigned int i;
+
+	hpriv = ahci_platform_get_resources(pdev, 0);
+	if (IS_ERR(hpriv))
+		return PTR_ERR(hpriv);
+
+	tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL);
+	if (!tegra)
+		return -ENOMEM;
+
+	hpriv->plat_data = tegra;
+
+	tegra->pdev = pdev;
+	tegra->soc = of_device_get_match_data(&pdev->dev);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	tegra->sata_regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(tegra->sata_regs))
+		return PTR_ERR(tegra->sata_regs);
+
+	/*
+	 * AUX registers is optional.
+	 */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+	if (res) {
+		tegra->sata_aux_regs = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(tegra->sata_aux_regs))
+			return PTR_ERR(tegra->sata_aux_regs);
+	}
+
+	tegra->sata_rst = devm_reset_control_get(&pdev->dev, "sata");
+	if (IS_ERR(tegra->sata_rst)) {
+		dev_err(&pdev->dev, "Failed to get sata reset\n");
+		return PTR_ERR(tegra->sata_rst);
+	}
+
+	tegra->sata_oob_rst = devm_reset_control_get(&pdev->dev, "sata-oob");
+	if (IS_ERR(tegra->sata_oob_rst)) {
+		dev_err(&pdev->dev, "Failed to get sata-oob reset\n");
+		return PTR_ERR(tegra->sata_oob_rst);
+	}
+
+	tegra->sata_cold_rst = devm_reset_control_get(&pdev->dev, "sata-cold");
+	if (IS_ERR(tegra->sata_cold_rst)) {
+		dev_err(&pdev->dev, "Failed to get sata-cold reset\n");
+		return PTR_ERR(tegra->sata_cold_rst);
+	}
+
+	tegra->sata_clk = devm_clk_get(&pdev->dev, "sata");
+	if (IS_ERR(tegra->sata_clk)) {
+		dev_err(&pdev->dev, "Failed to get sata clock\n");
+		return PTR_ERR(tegra->sata_clk);
+	}
+
+	tegra->supplies = devm_kcalloc(&pdev->dev,
+				       tegra->soc->num_supplies,
+				       sizeof(*tegra->supplies), GFP_KERNEL);
+	if (!tegra->supplies)
+		return -ENOMEM;
+
+	for (i = 0; i < tegra->soc->num_supplies; i++)
+		tegra->supplies[i].supply = tegra->soc->supply_names[i];
+
+	ret = devm_regulator_bulk_get(&pdev->dev,
+				      tegra->soc->num_supplies,
+				      tegra->supplies);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to get regulators\n");
+		return ret;
+	}
+
+	ret = tegra_ahci_controller_init(hpriv);
+	if (ret)
+		return ret;
+
+	ret = ahci_platform_init_host(pdev, hpriv, &ahci_tegra_port_info,
+				      &ahci_platform_sht);
+	if (ret)
+		goto deinit_controller;
+
+	return 0;
+
+deinit_controller:
+	tegra_ahci_controller_deinit(hpriv);
+
+	return ret;
+};
+
+static struct platform_driver tegra_ahci_driver = {
+	.probe = tegra_ahci_probe,
+	.remove = ata_platform_remove_one,
+	.driver = {
+		.name = DRV_NAME,
+		.of_match_table = tegra_ahci_of_match,
+	},
+	/* LP0 suspend support not implemented */
+};
+module_platform_driver(tegra_ahci_driver);
+
+MODULE_AUTHOR("Mikko Perttunen <mperttunen@nvidia.com>");
+MODULE_DESCRIPTION("Tegra AHCI SATA driver");
+MODULE_LICENSE("GPL v2");