drivers: block: dwc_ahci: Implement a driver for Synopsys DWC sata device

Implement a sata driver for Synopsys DWC sata device based on
U-boot driver model.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 101 insertions, 0 deletions

diff --git a/drivers/block/dwc_ahci.c b/drivers/block/dwc_ahci.c
new file mode 100644
index 0000000000..d5bb0b887a
--- /dev/null
+++ b/drivers/block/dwc_ahci.c
@@ -0,0 +1,101 @@
+/*
+ * DWC SATA platform driver
+ *
+ * (C) Copyright 2016
+ *     Texas Instruments Incorporated, <www.ti.com>
+ *
+ * Author: Mugunthan V N <mugunthanvnm@ti.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <ahci.h>
+#include <scsi.h>
+#include <sata.h>
+#include <asm/arch/sata.h>
+#include <asm/io.h>
+#include <generic-phy.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct dwc_ahci_priv {
+	void *base;
+	void *wrapper_base;
+};
+
+static int dwc_ahci_ofdata_to_platdata(struct udevice *dev)
+{
+	struct dwc_ahci_priv *priv = dev_get_priv(dev);
+	struct scsi_platdata *plat = dev_get_platdata(dev);
+	fdt_addr_t addr;
+
+	plat->max_id = fdtdec_get_uint(gd->fdt_blob, dev->of_offset, "max-id",
+				       CONFIG_SYS_SCSI_MAX_SCSI_ID);
+	plat->max_lun = fdtdec_get_uint(gd->fdt_blob, dev->of_offset,
+					"max-lun", CONFIG_SYS_SCSI_MAX_LUN);
+
+	priv->base = map_physmem(dev_get_addr(dev), sizeof(void *),
+				 MAP_NOCACHE);
+
+	addr = dev_get_addr_index(dev, 1);
+	if (addr != FDT_ADDR_T_NONE) {
+		priv->wrapper_base = map_physmem(addr, sizeof(void *),
+						 MAP_NOCACHE);
+	} else {
+		priv->wrapper_base = NULL;
+	}
+
+	return 0;
+}
+
+static int dwc_ahci_probe(struct udevice *dev)
+{
+	struct dwc_ahci_priv *priv = dev_get_priv(dev);
+	int ret;
+	struct phy phy;
+
+	ret = generic_phy_get_by_name(dev, "sata-phy", &phy);
+	if (ret) {
+		error("can't get the phy from DT\n");
+		return ret;
+	}
+
+	ret = generic_phy_init(&phy);
+	if (ret) {
+		error("unable to initialize the sata phy\n");
+		return ret;
+	}
+
+	ret = generic_phy_power_on(&phy);
+	if (ret) {
+		error("unable to power on the sata phy\n");
+		return ret;
+	}
+
+	if (priv->wrapper_base) {
+		u32 val = TI_SATA_IDLE_NO | TI_SATA_STANDBY_NO;
+
+		/* Enable SATA module, No Idle, No Standby */
+		writel(val, priv->wrapper_base + TI_SATA_SYSCONFIG);
+	}
+
+	return ahci_init(priv->base);
+}
+
+static const struct udevice_id dwc_ahci_ids[] = {
+	{ .compatible = "snps,dwc-ahci" },
+	{ }
+};
+
+U_BOOT_DRIVER(dwc_ahci) = {
+	.name	= "dwc_ahci",
+	.id	= UCLASS_SCSI,
+	.of_match = dwc_ahci_ids,
+	.ofdata_to_platdata = dwc_ahci_ofdata_to_platdata,
+	.probe	= dwc_ahci_probe,
+	.priv_auto_alloc_size = sizeof(struct dwc_ahci_priv),
+	.platdata_auto_alloc_size = sizeof(struct scsi_platdata),
+	.flags = DM_FLAG_ALLOC_PRIV_DMA,
+};