Adding upstream version 6.1.76.upstream/6.1.76upstream

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

1 files changed, 383 insertions, 0 deletions

diff --git a/drivers/ata/ahci_ceva.c b/drivers/ata/ahci_ceva.c
new file mode 100644
index 000000000..cb24ecf36
--- /dev/null
+++ b/drivers/ata/ahci_ceva.c
@@ -0,0 +1,383 @@
+// 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 <linux/reset.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;
+	struct reset_control *rst;
+};
+
+static unsigned int ceva_ahci_read_id(struct ata_device *dev,
+				      struct ata_taskfile *tf, __le16 *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;
+
+	cevapriv->rst = devm_reset_control_get_optional_exclusive(&pdev->dev,
+								  NULL);
+	if (IS_ERR(cevapriv->rst))
+		dev_err_probe(&pdev->dev, PTR_ERR(cevapriv->rst),
+			      "failed to get reset\n");
+
+	hpriv = ahci_platform_get_resources(pdev, 0);
+	if (IS_ERR(hpriv))
+		return PTR_ERR(hpriv);
+
+	if (!cevapriv->rst) {
+		rc = ahci_platform_enable_resources(hpriv);
+		if (rc)
+			return rc;
+	} else {
+		int i;
+
+		rc = ahci_platform_enable_clks(hpriv);
+		if (rc)
+			return rc;
+		/* Assert the controller reset */
+		reset_control_assert(cevapriv->rst);
+
+		for (i = 0; i < hpriv->nports; i++) {
+			rc = phy_init(hpriv->phys[i]);
+			if (rc)
+				return rc;
+		}
+
+		/* De-assert the controller reset */
+		reset_control_deassert(cevapriv->rst);
+
+		for (i = 0; i < hpriv->nports; i++) {
+			rc = phy_power_on(hpriv->phys[i]);
+			if (rc) {
+				phy_exit(hpriv->phys[i]);
+				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" },
+	{ /* sentinel */ }
+};
+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");