drivers/ata/ahci_ceva.c - linux/torvalds/linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2015 Xilinx, Inc.
  * CEVA AHCI SATA platform driver
  *
  * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
  */

 #include <linux/ahci_platform.h>
 #include <linux/kernel.h>
 #include <linux/libata.h>
 #include <linux/module.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include "ahci.h"

 /* Vendor Specific Register Offsets */
 #define AHCI_VEND_PCFG  0xA4
 #define AHCI_VEND_PPCFG 0xA8
 #define AHCI_VEND_PP2C  0xAC
 #define AHCI_VEND_PP3C  0xB0
 #define AHCI_VEND_PP4C  0xB4
 #define AHCI_VEND_PP5C  0xB8
 #define AHCI_VEND_AXICC 0xBC
 #define AHCI_VEND_PAXIC 0xC0
 #define AHCI_VEND_PTC   0xC8

 /* Vendor Specific Register bit definitions */
 #define PAXIC_ADBW_BW64 0x1
 #define PAXIC_MAWID(i)	(((i) * 2) << 4)
 #define PAXIC_MARID(i)	(((i) * 2) << 12)
 #define PAXIC_MARIDD(i)	((((i) * 2) + 1) << 16)
 #define PAXIC_MAWIDD(i)	((((i) * 2) + 1) << 8)
 #define PAXIC_OTL	(0x4 << 20)

 /* Register bit definitions for cache control */
 #define AXICC_ARCA_VAL  (0xF << 0)
 #define AXICC_ARCF_VAL  (0xF << 4)
 #define AXICC_ARCH_VAL  (0xF << 8)
 #define AXICC_ARCP_VAL  (0xF << 12)
 #define AXICC_AWCFD_VAL (0xF << 16)
 #define AXICC_AWCD_VAL  (0xF << 20)
 #define AXICC_AWCF_VAL  (0xF << 24)

 #define PCFG_TPSS_VAL	(0x32 << 16)
 #define PCFG_TPRS_VAL	(0x2 << 12)
 #define PCFG_PAD_VAL	0x2

 #define PPCFG_TTA	0x1FFFE
 #define PPCFG_PSSO_EN	(1 << 28)
 #define PPCFG_PSS_EN	(1 << 29)
 #define PPCFG_ESDF_EN	(1 << 31)

 #define PP5C_RIT	0x60216
 #define PP5C_RCT	(0x7f0 << 20)

 #define PTC_RX_WM_VAL	0x40
 #define PTC_RSVD	(1 << 27)

 #define PORT0_BASE	0x100
 #define PORT1_BASE	0x180

 /* Port Control Register Bit Definitions */
 #define PORT_SCTL_SPD_GEN3	(0x3 << 4)
 #define PORT_SCTL_SPD_GEN2	(0x2 << 4)
 #define PORT_SCTL_SPD_GEN1	(0x1 << 4)
 #define PORT_SCTL_IPM		(0x3 << 8)

 #define PORT_BASE	0x100
 #define PORT_OFFSET	0x80
 #define NR_PORTS	2
 #define DRV_NAME	"ahci-ceva"
 #define CEVA_FLAG_BROKEN_GEN2	1

 static unsigned int rx_watermark = PTC_RX_WM_VAL;
 module_param(rx_watermark, uint, 0644);
 MODULE_PARM_DESC(rx_watermark, "RxWaterMark value (0 - 0x80)");

 struct ceva_ahci_priv {
 	struct platform_device *ahci_pdev;
 	/* Port Phy2Cfg Register */
 	u32 pp2c[NR_PORTS];
 	u32 pp3c[NR_PORTS];
 	u32 pp4c[NR_PORTS];
 	u32 pp5c[NR_PORTS];
 	/* Axi Cache Control Register */
 	u32 axicc;
 	bool is_cci_enabled;
 	int flags;
 };

 static unsigned int ceva_ahci_read_id(struct ata_device *dev,
 					struct ata_taskfile *tf, u16 *id)
 {
 	u32 err_mask;

 	err_mask = ata_do_dev_read_id(dev, tf, id);
 	if (err_mask)
 		return err_mask;
 	/*
 	 * Since CEVA controller does not support device sleep feature, we
 	 * need to clear DEVSLP (bit 8) in word78 of the IDENTIFY DEVICE data.
 	 */
 	id[ATA_ID_FEATURE_SUPP] &= cpu_to_le16(~(1 << 8));

 	return 0;
 }

 static struct ata_port_operations ahci_ceva_ops = {
 	.inherits = &ahci_platform_ops,
 	.read_id = ceva_ahci_read_id,
 };

 static const struct ata_port_info ahci_ceva_port_info = {
 	.flags          = AHCI_FLAG_COMMON,
 	.pio_mask       = ATA_PIO4,
 	.udma_mask      = ATA_UDMA6,
 	.port_ops	= &ahci_ceva_ops,
 };

 static void ahci_ceva_setup(struct ahci_host_priv *hpriv)
 {
 	void __iomem *mmio = hpriv->mmio;
 	struct ceva_ahci_priv *cevapriv = hpriv->plat_data;
 	u32 tmp;
 	int i;

 	/* Set AHCI Enable */
 	tmp = readl(mmio + HOST_CTL);
 	tmp |= HOST_AHCI_EN;
 	writel(tmp, mmio + HOST_CTL);

 	for (i = 0; i < NR_PORTS; i++) {
 		/* TPSS TPRS scalars, CISE and Port Addr */
 		tmp = PCFG_TPSS_VAL | PCFG_TPRS_VAL | (PCFG_PAD_VAL + i);
 		writel(tmp, mmio + AHCI_VEND_PCFG);

 		/*
 		 * AXI Data bus width to 64
 		 * Set Mem Addr Read, Write ID for data transfers
 		 * Set Mem Addr Read ID, Write ID for non-data transfers
 		 * Transfer limit to 72 DWord
 		 */
 		tmp = PAXIC_ADBW_BW64 | PAXIC_MAWIDD(i) | PAXIC_MARIDD(i) |
 			PAXIC_MAWID(i) | PAXIC_MARID(i) | PAXIC_OTL;
 		writel(tmp, mmio + AHCI_VEND_PAXIC);

 		/* Set AXI cache control register if CCi is enabled */
 		if (cevapriv->is_cci_enabled) {
 			tmp = readl(mmio + AHCI_VEND_AXICC);
 			tmp |= AXICC_ARCA_VAL | AXICC_ARCF_VAL |
 				AXICC_ARCH_VAL | AXICC_ARCP_VAL |
 				AXICC_AWCFD_VAL | AXICC_AWCD_VAL |
 				AXICC_AWCF_VAL;
 			writel(tmp, mmio + AHCI_VEND_AXICC);
 		}

 		/* Port Phy Cfg register enables */
 		tmp = PPCFG_TTA | PPCFG_PSS_EN | PPCFG_ESDF_EN;
 		writel(tmp, mmio + AHCI_VEND_PPCFG);

 		/* Phy Control OOB timing parameters COMINIT */
 		writel(cevapriv->pp2c[i], mmio + AHCI_VEND_PP2C);

 		/* Phy Control OOB timing parameters COMWAKE */
 		writel(cevapriv->pp3c[i], mmio + AHCI_VEND_PP3C);

 		/* Phy Control Burst timing setting */
 		writel(cevapriv->pp4c[i], mmio + AHCI_VEND_PP4C);

 		/* Rate Change Timer and Retry Interval Timer setting */
 		writel(cevapriv->pp5c[i], mmio + AHCI_VEND_PP5C);

 		/* Rx Watermark setting  */
 		tmp = rx_watermark | PTC_RSVD;
 		writel(tmp, mmio + AHCI_VEND_PTC);

 		/* Default to Gen 3 Speed and Gen 1 if Gen2 is broken */
 		tmp = PORT_SCTL_SPD_GEN3 | PORT_SCTL_IPM;
 		if (cevapriv->flags & CEVA_FLAG_BROKEN_GEN2)
 			tmp = PORT_SCTL_SPD_GEN1 | PORT_SCTL_IPM;
 		writel(tmp, mmio + PORT_SCR_CTL + PORT_BASE + PORT_OFFSET * i);
 	}
 }

 static struct scsi_host_template ahci_platform_sht = {
 	AHCI_SHT(DRV_NAME),
 };

 static int ceva_ahci_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
 	struct device *dev = &pdev->dev;
 	struct ahci_host_priv *hpriv;
 	struct ceva_ahci_priv *cevapriv;
 	enum dev_dma_attr attr;
 	int rc;

 	cevapriv = devm_kzalloc(dev, sizeof(*cevapriv), GFP_KERNEL);
 	if (!cevapriv)
 		return -ENOMEM;

 	cevapriv->ahci_pdev = pdev;

 	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);

 	rc = ahci_platform_enable_resources(hpriv);
 	if (rc)
 		return rc;

 	if (of_property_read_bool(np, "ceva,broken-gen2"))
 		cevapriv->flags = CEVA_FLAG_BROKEN_GEN2;

 	/* Read OOB timing value for COMINIT from device-tree */
 	if (of_property_read_u8_array(np, "ceva,p0-cominit-params",
 					(u8 *)&cevapriv->pp2c[0], 4) < 0) {
 		dev_warn(dev, "ceva,p0-cominit-params property not defined\n");
 		return -EINVAL;
 	}

 	if (of_property_read_u8_array(np, "ceva,p1-cominit-params",
 					(u8 *)&cevapriv->pp2c[1], 4) < 0) {
 		dev_warn(dev, "ceva,p1-cominit-params property not defined\n");
 		return -EINVAL;
 	}

 	/* Read OOB timing value for COMWAKE from device-tree*/
 	if (of_property_read_u8_array(np, "ceva,p0-comwake-params",
 					(u8 *)&cevapriv->pp3c[0], 4) < 0) {
 		dev_warn(dev, "ceva,p0-comwake-params property not defined\n");
 		return -EINVAL;
 	}

 	if (of_property_read_u8_array(np, "ceva,p1-comwake-params",
 					(u8 *)&cevapriv->pp3c[1], 4) < 0) {
 		dev_warn(dev, "ceva,p1-comwake-params property not defined\n");
 		return -EINVAL;
 	}

 	/* Read phy BURST timing value from device-tree */
 	if (of_property_read_u8_array(np, "ceva,p0-burst-params",
 					(u8 *)&cevapriv->pp4c[0], 4) < 0) {
 		dev_warn(dev, "ceva,p0-burst-params property not defined\n");
 		return -EINVAL;
 	}

 	if (of_property_read_u8_array(np, "ceva,p1-burst-params",
 					(u8 *)&cevapriv->pp4c[1], 4) < 0) {
 		dev_warn(dev, "ceva,p1-burst-params property not defined\n");
 		return -EINVAL;
 	}

 	/* Read phy RETRY interval timing value from device-tree */
 	if (of_property_read_u16_array(np, "ceva,p0-retry-params",
 					(u16 *)&cevapriv->pp5c[0], 2) < 0) {
 		dev_warn(dev, "ceva,p0-retry-params property not defined\n");
 		return -EINVAL;
 	}

 	if (of_property_read_u16_array(np, "ceva,p1-retry-params",
 					(u16 *)&cevapriv->pp5c[1], 2) < 0) {
 		dev_warn(dev, "ceva,p1-retry-params property not defined\n");
 		return -EINVAL;
 	}

 	/*
 	 * Check if CCI is enabled for SATA. The DEV_DMA_COHERENT is returned
 	 * if CCI is enabled, so check for DEV_DMA_COHERENT.
 	 */
 	attr = device_get_dma_attr(dev);
 	cevapriv->is_cci_enabled = (attr == DEV_DMA_COHERENT);

 	hpriv->plat_data = cevapriv;

 	/* CEVA specific initialization */
 	ahci_ceva_setup(hpriv);

 	rc = ahci_platform_init_host(pdev, hpriv, &ahci_ceva_port_info,
 					&ahci_platform_sht);
 	if (rc)
 		goto disable_resources;

 	return 0;

 disable_resources:
 	ahci_platform_disable_resources(hpriv);
 	return rc;
 }

 static int __maybe_unused ceva_ahci_suspend(struct device *dev)
 {
 	return ahci_platform_suspend(dev);
 }

 static int __maybe_unused ceva_ahci_resume(struct device *dev)
 {
 	struct ata_host *host = dev_get_drvdata(dev);
 	struct ahci_host_priv *hpriv = host->private_data;
 	int rc;

 	rc = ahci_platform_enable_resources(hpriv);
 	if (rc)
 		return rc;

 	/* Configure CEVA specific config before resuming HBA */
 	ahci_ceva_setup(hpriv);

 	rc = ahci_platform_resume_host(dev);
 	if (rc)
 		goto disable_resources;

 	/* We resumed so update PM runtime state */
 	pm_runtime_disable(dev);
 	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);

 	return 0;

 disable_resources:
 	ahci_platform_disable_resources(hpriv);

 	return rc;
 }

 static SIMPLE_DEV_PM_OPS(ahci_ceva_pm_ops, ceva_ahci_suspend, ceva_ahci_resume);

 static const struct of_device_id ceva_ahci_of_match[] = {
 	{ .compatible = "ceva,ahci-1v84" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, ceva_ahci_of_match);

 static struct platform_driver ceva_ahci_driver = {
 	.probe = ceva_ahci_probe,
 	.remove = ata_platform_remove_one,
 	.driver = {
 		.name = DRV_NAME,
 		.of_match_table = ceva_ahci_of_match,
 		.pm = &ahci_ceva_pm_ops,
 	},
 };
 module_platform_driver(ceva_ahci_driver);

 MODULE_DESCRIPTION("CEVA AHCI SATA platform driver");
 MODULE_AUTHOR("Xilinx Inc.");
 MODULE_LICENSE("GPL v2");
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* Copyright (C) 2015 Xilinx, Inc.
	* CEVA AHCI SATA platform driver
	*
	* based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
	*/

	#include <linux/ahci_platform.h>
	#include <linux/kernel.h>
	#include <linux/libata.h>
	#include <linux/module.h>
	#include <linux/of_device.h>
	#include <linux/platform_device.h>
	#include "ahci.h"

	/* Vendor Specific Register Offsets */
	#define AHCI_VEND_PCFG 0xA4
	#define AHCI_VEND_PPCFG 0xA8
	#define AHCI_VEND_PP2C 0xAC
	#define AHCI_VEND_PP3C 0xB0
	#define AHCI_VEND_PP4C 0xB4
	#define AHCI_VEND_PP5C 0xB8
	#define AHCI_VEND_AXICC 0xBC
	#define AHCI_VEND_PAXIC 0xC0
	#define AHCI_VEND_PTC 0xC8

	/* Vendor Specific Register bit definitions */
	#define PAXIC_ADBW_BW64 0x1
	#define PAXIC_MAWID(i) (((i) * 2) << 4)
	#define PAXIC_MARID(i) (((i) * 2) << 12)
	#define PAXIC_MARIDD(i) ((((i) * 2) + 1) << 16)
	#define PAXIC_MAWIDD(i) ((((i) * 2) + 1) << 8)
	#define PAXIC_OTL (0x4 << 20)

	/* Register bit definitions for cache control */
	#define AXICC_ARCA_VAL (0xF << 0)
	#define AXICC_ARCF_VAL (0xF << 4)
	#define AXICC_ARCH_VAL (0xF << 8)
	#define AXICC_ARCP_VAL (0xF << 12)
	#define AXICC_AWCFD_VAL (0xF << 16)
	#define AXICC_AWCD_VAL (0xF << 20)
	#define AXICC_AWCF_VAL (0xF << 24)

	#define PCFG_TPSS_VAL (0x32 << 16)
	#define PCFG_TPRS_VAL (0x2 << 12)
	#define PCFG_PAD_VAL 0x2

	#define PPCFG_TTA 0x1FFFE
	#define PPCFG_PSSO_EN (1 << 28)
	#define PPCFG_PSS_EN (1 << 29)
	#define PPCFG_ESDF_EN (1 << 31)

	#define PP5C_RIT 0x60216
	#define PP5C_RCT (0x7f0 << 20)

	#define PTC_RX_WM_VAL 0x40
	#define PTC_RSVD (1 << 27)

	#define PORT0_BASE 0x100
	#define PORT1_BASE 0x180

	/* Port Control Register Bit Definitions */
	#define PORT_SCTL_SPD_GEN3 (0x3 << 4)
	#define PORT_SCTL_SPD_GEN2 (0x2 << 4)
	#define PORT_SCTL_SPD_GEN1 (0x1 << 4)
	#define PORT_SCTL_IPM (0x3 << 8)

	#define PORT_BASE 0x100
	#define PORT_OFFSET 0x80
	#define NR_PORTS 2
	#define DRV_NAME "ahci-ceva"
	#define CEVA_FLAG_BROKEN_GEN2 1

	static unsigned int rx_watermark = PTC_RX_WM_VAL;
	module_param(rx_watermark, uint, 0644);
	MODULE_PARM_DESC(rx_watermark, "RxWaterMark value (0 - 0x80)");

	struct ceva_ahci_priv {
	struct platform_device *ahci_pdev;
	/* Port Phy2Cfg Register */
	u32 pp2c[NR_PORTS];
	u32 pp3c[NR_PORTS];
	u32 pp4c[NR_PORTS];
	u32 pp5c[NR_PORTS];
	/* Axi Cache Control Register */
	u32 axicc;
	bool is_cci_enabled;
	int flags;
	};

	static unsigned int ceva_ahci_read_id(struct ata_device *dev,
	struct ata_taskfile tf, u16 id)
	{
	u32 err_mask;

	err_mask = ata_do_dev_read_id(dev, tf, id);
	if (err_mask)
	return err_mask;
	/*
	* Since CEVA controller does not support device sleep feature, we
	* need to clear DEVSLP (bit 8) in word78 of the IDENTIFY DEVICE data.
	*/
	id[ATA_ID_FEATURE_SUPP] &= cpu_to_le16(~(1 << 8));

	return 0;
	}

	static struct ata_port_operations ahci_ceva_ops = {
	.inherits = &ahci_platform_ops,
	.read_id = ceva_ahci_read_id,
	};

	static const struct ata_port_info ahci_ceva_port_info = {
	.flags = AHCI_FLAG_COMMON,
	.pio_mask = ATA_PIO4,
	.udma_mask = ATA_UDMA6,
	.port_ops = &ahci_ceva_ops,
	};

	static void ahci_ceva_setup(struct ahci_host_priv *hpriv)
	{
	void __iomem *mmio = hpriv->mmio;
	struct ceva_ahci_priv *cevapriv = hpriv->plat_data;
	u32 tmp;
	int i;

	/* Set AHCI Enable */
	tmp = readl(mmio + HOST_CTL);
	tmp \|= HOST_AHCI_EN;
	writel(tmp, mmio + HOST_CTL);

	for (i = 0; i < NR_PORTS; i++) {
	/* TPSS TPRS scalars, CISE and Port Addr */
	tmp = PCFG_TPSS_VAL \| PCFG_TPRS_VAL \| (PCFG_PAD_VAL + i);
	writel(tmp, mmio + AHCI_VEND_PCFG);

	/*
	* AXI Data bus width to 64
	* Set Mem Addr Read, Write ID for data transfers
	* Set Mem Addr Read ID, Write ID for non-data transfers
	* Transfer limit to 72 DWord
	*/
	tmp = PAXIC_ADBW_BW64 \| PAXIC_MAWIDD(i) \| PAXIC_MARIDD(i) \|
	PAXIC_MAWID(i) \| PAXIC_MARID(i) \| PAXIC_OTL;
	writel(tmp, mmio + AHCI_VEND_PAXIC);

	/* Set AXI cache control register if CCi is enabled */
	if (cevapriv->is_cci_enabled) {
	tmp = readl(mmio + AHCI_VEND_AXICC);
	tmp \|= AXICC_ARCA_VAL \| AXICC_ARCF_VAL \|
	AXICC_ARCH_VAL \| AXICC_ARCP_VAL \|
	AXICC_AWCFD_VAL \| AXICC_AWCD_VAL \|
	AXICC_AWCF_VAL;
	writel(tmp, mmio + AHCI_VEND_AXICC);
	}

	/* Port Phy Cfg register enables */
	tmp = PPCFG_TTA \| PPCFG_PSS_EN \| PPCFG_ESDF_EN;
	writel(tmp, mmio + AHCI_VEND_PPCFG);

	/* Phy Control OOB timing parameters COMINIT */
	writel(cevapriv->pp2c[i], mmio + AHCI_VEND_PP2C);

	/* Phy Control OOB timing parameters COMWAKE */
	writel(cevapriv->pp3c[i], mmio + AHCI_VEND_PP3C);

	/* Phy Control Burst timing setting */
	writel(cevapriv->pp4c[i], mmio + AHCI_VEND_PP4C);

	/* Rate Change Timer and Retry Interval Timer setting */
	writel(cevapriv->pp5c[i], mmio + AHCI_VEND_PP5C);

	/* Rx Watermark setting */
	tmp = rx_watermark \| PTC_RSVD;
	writel(tmp, mmio + AHCI_VEND_PTC);

	/* Default to Gen 3 Speed and Gen 1 if Gen2 is broken */
	tmp = PORT_SCTL_SPD_GEN3 \| PORT_SCTL_IPM;
	if (cevapriv->flags & CEVA_FLAG_BROKEN_GEN2)
	tmp = PORT_SCTL_SPD_GEN1 \| PORT_SCTL_IPM;
	writel(tmp, mmio + PORT_SCR_CTL + PORT_BASE + PORT_OFFSET * i);
	}
	}

	static struct scsi_host_template ahci_platform_sht = {
	AHCI_SHT(DRV_NAME),
	};

	static int ceva_ahci_probe(struct platform_device *pdev)
	{
	struct device_node *np = pdev->dev.of_node;
	struct device *dev = &pdev->dev;
	struct ahci_host_priv *hpriv;
	struct ceva_ahci_priv *cevapriv;
	enum dev_dma_attr attr;
	int rc;

	cevapriv = devm_kzalloc(dev, sizeof(*cevapriv), GFP_KERNEL);
	if (!cevapriv)
	return -ENOMEM;

	cevapriv->ahci_pdev = pdev;

	hpriv = ahci_platform_get_resources(pdev, 0);
	if (IS_ERR(hpriv))
	return PTR_ERR(hpriv);

	rc = ahci_platform_enable_resources(hpriv);
	if (rc)
	return rc;

	if (of_property_read_bool(np, "ceva,broken-gen2"))
	cevapriv->flags = CEVA_FLAG_BROKEN_GEN2;

	/* Read OOB timing value for COMINIT from device-tree */
	if (of_property_read_u8_array(np, "ceva,p0-cominit-params",
	(u8 *)&cevapriv->pp2c[0], 4) < 0) {
	dev_warn(dev, "ceva,p0-cominit-params property not defined\n");
	return -EINVAL;
	}

	if (of_property_read_u8_array(np, "ceva,p1-cominit-params",
	(u8 *)&cevapriv->pp2c[1], 4) < 0) {
	dev_warn(dev, "ceva,p1-cominit-params property not defined\n");
	return -EINVAL;
	}

	/* Read OOB timing value for COMWAKE from device-tree*/
	if (of_property_read_u8_array(np, "ceva,p0-comwake-params",
	(u8 *)&cevapriv->pp3c[0], 4) < 0) {
	dev_warn(dev, "ceva,p0-comwake-params property not defined\n");
	return -EINVAL;
	}

	if (of_property_read_u8_array(np, "ceva,p1-comwake-params",
	(u8 *)&cevapriv->pp3c[1], 4) < 0) {
	dev_warn(dev, "ceva,p1-comwake-params property not defined\n");
	return -EINVAL;
	}

	/* Read phy BURST timing value from device-tree */
	if (of_property_read_u8_array(np, "ceva,p0-burst-params",
	(u8 *)&cevapriv->pp4c[0], 4) < 0) {
	dev_warn(dev, "ceva,p0-burst-params property not defined\n");
	return -EINVAL;
	}

	if (of_property_read_u8_array(np, "ceva,p1-burst-params",
	(u8 *)&cevapriv->pp4c[1], 4) < 0) {
	dev_warn(dev, "ceva,p1-burst-params property not defined\n");
	return -EINVAL;
	}

	/* Read phy RETRY interval timing value from device-tree */
	if (of_property_read_u16_array(np, "ceva,p0-retry-params",
	(u16 *)&cevapriv->pp5c[0], 2) < 0) {
	dev_warn(dev, "ceva,p0-retry-params property not defined\n");
	return -EINVAL;
	}

	if (of_property_read_u16_array(np, "ceva,p1-retry-params",
	(u16 *)&cevapriv->pp5c[1], 2) < 0) {
	dev_warn(dev, "ceva,p1-retry-params property not defined\n");
	return -EINVAL;
	}

	/*
	* Check if CCI is enabled for SATA. The DEV_DMA_COHERENT is returned
	* if CCI is enabled, so check for DEV_DMA_COHERENT.
	*/
	attr = device_get_dma_attr(dev);
	cevapriv->is_cci_enabled = (attr == DEV_DMA_COHERENT);

	hpriv->plat_data = cevapriv;

	/* CEVA specific initialization */
	ahci_ceva_setup(hpriv);

	rc = ahci_platform_init_host(pdev, hpriv, &ahci_ceva_port_info,
	&ahci_platform_sht);
	if (rc)
	goto disable_resources;

	return 0;

	disable_resources:
	ahci_platform_disable_resources(hpriv);
	return rc;
	}

	static int __maybe_unused ceva_ahci_suspend(struct device *dev)
	{
	return ahci_platform_suspend(dev);
	}

	static int __maybe_unused ceva_ahci_resume(struct device *dev)
	{
	struct ata_host *host = dev_get_drvdata(dev);
	struct ahci_host_priv *hpriv = host->private_data;
	int rc;

	rc = ahci_platform_enable_resources(hpriv);
	if (rc)
	return rc;

	/* Configure CEVA specific config before resuming HBA */
	ahci_ceva_setup(hpriv);

	rc = ahci_platform_resume_host(dev);
	if (rc)
	goto disable_resources;

	/* We resumed so update PM runtime state */
	pm_runtime_disable(dev);
	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);

	return 0;

	disable_resources:
	ahci_platform_disable_resources(hpriv);

	return rc;
	}

	static SIMPLE_DEV_PM_OPS(ahci_ceva_pm_ops, ceva_ahci_suspend, ceva_ahci_resume);

	static const struct of_device_id ceva_ahci_of_match[] = {
	{ .compatible = "ceva,ahci-1v84" },
	{},
	};
	MODULE_DEVICE_TABLE(of, ceva_ahci_of_match);

	static struct platform_driver ceva_ahci_driver = {
	.probe = ceva_ahci_probe,
	.remove = ata_platform_remove_one,
	.driver = {
	.name = DRV_NAME,
	.of_match_table = ceva_ahci_of_match,
	.pm = &ahci_ceva_pm_ops,
	},
	};
	module_platform_driver(ceva_ahci_driver);

	MODULE_DESCRIPTION("CEVA AHCI SATA platform driver");
	MODULE_AUTHOR("Xilinx Inc.");
	MODULE_LICENSE("GPL v2");