1 files changed, 87 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/usb.c b/arch/arm/mach-davinci/usb.c
new file mode 100644
index 000000000..31ed7aa47
--- /dev/null
+++ b/arch/arm/mach-davinci/usb.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * USB
+ */
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+
+#include <linux/usb/musb.h>
+
+#include <mach/common.h>
+#include <mach/irqs.h>
+#include <mach/cputype.h>
+#include <linux/platform_data/usb-davinci.h>
+
+#define DAVINCI_USB_OTG_BASE	0x01c64000
+
+#if IS_ENABLED(CONFIG_USB_MUSB_HDRC)
+static struct musb_hdrc_config musb_config = {
+	.multipoint	= true,
+
+	.num_eps	= 5,
+	.ram_bits	= 10,
+};
+
+static struct musb_hdrc_platform_data usb_data = {
+	/* OTG requires a Mini-AB connector */
+	.mode           = MUSB_OTG,
+	.clock		= "usb",
+	.config		= &musb_config,
+};
+
+static struct resource usb_resources[] = {
+	{
+		/* physical address */
+		.start          = DAVINCI_USB_OTG_BASE,
+		.end            = DAVINCI_USB_OTG_BASE + 0x5ff,
+		.flags          = IORESOURCE_MEM,
+	},
+	{
+		.start          = IRQ_USBINT,
+		.flags          = IORESOURCE_IRQ,
+		.name		= "mc"
+	},
+	{
+		/* placeholder for the dedicated CPPI IRQ */
+		.flags          = IORESOURCE_IRQ,
+		.name		= "dma"
+	},
+};
+
+static u64 usb_dmamask = DMA_BIT_MASK(32);
+
+static struct platform_device usb_dev = {
+	.name           = "musb-davinci",
+	.id             = -1,
+	.dev = {
+		.platform_data		= &usb_data,
+		.dma_mask		= &usb_dmamask,
+		.coherent_dma_mask      = DMA_BIT_MASK(32),
+	},
+	.resource       = usb_resources,
+	.num_resources  = ARRAY_SIZE(usb_resources),
+};
+
+void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
+{
+	usb_data.power = mA > 510 ? 255 : mA / 2;
+	usb_data.potpgt = (potpgt_ms + 1) / 2;
+
+	if (cpu_is_davinci_dm646x()) {
+		/* Override the defaults as DM6467 uses different IRQs. */
+		usb_dev.resource[1].start = IRQ_DM646X_USBINT;
+		usb_dev.resource[2].start = IRQ_DM646X_USBDMAINT;
+	} else	/* other devices don't have dedicated CPPI IRQ */
+		usb_dev.num_resources = 2;
+
+	platform_device_register(&usb_dev);
+}
+
+#else
+
+void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
+{
+}
+
+#endif  /* CONFIG_USB_MUSB_HDRC */