ARM: DaVinci: usb setup

Declare the musb_hdrc platform device for DaVinci.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

3 files changed, 120 insertions, 1 deletions

diff --git a/arch/arm/mach-davinci/Makefile b/arch/arm/mach-davinci/Makefile
index bddfbb7..4dc4585 100644
--- a/arch/arm/mach-davinci/Makefile
+++ b/arch/arm/mach-davinci/Makefile
@@ -5,7 +5,7 @@
 
 # Common objects
 obj-y 			:= time.o irq.o clock.o serial.o io.o id.o psc.o \
-			   gpio.o mux.o devices.o
+			   gpio.o mux.o devices.o usb.o
 
 # Board specific
 obj-$(CONFIG_MACH_DAVINCI_EVM)  += board-evm.o
diff --git a/arch/arm/mach-davinci/include/mach/common.h b/arch/arm/mach-davinci/include/mach/common.h
index a97dfbb..4b522e5 100644
--- a/arch/arm/mach-davinci/include/mach/common.h
+++ b/arch/arm/mach-davinci/include/mach/common.h
@@ -16,4 +16,7 @@ struct sys_timer;
 
 extern struct sys_timer davinci_timer;
 
+/* parameters describe VBUS sourcing for host mode */
+extern void setup_usb(unsigned mA, unsigned potpgt_msec);
+
 #endif /* __ARCH_ARM_MACH_DAVINCI_COMMON_H */
diff --git a/arch/arm/mach-davinci/usb.c b/arch/arm/mach-davinci/usb.c
new file mode 100644
index 0000000..fe182a8
--- /dev/null
+++ b/arch/arm/mach-davinci/usb.c
@@ -0,0 +1,116 @@
+/*
+ * USB
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+
+#include <linux/usb/musb.h>
+#include <linux/usb/otg.h>
+
+#include <mach/common.h>
+#include <mach/hardware.h>
+
+#if defined(CONFIG_USB_MUSB_HDRC) || defined(CONFIG_USB_MUSB_HDRC_MODULE)
+static struct musb_hdrc_eps_bits musb_eps[] = {
+	{ "ep1_tx", 8, },
+	{ "ep1_rx", 8, },
+	{ "ep2_tx", 8, },
+	{ "ep2_rx", 8, },
+	{ "ep3_tx", 5, },
+	{ "ep3_rx", 5, },
+	{ "ep4_tx", 5, },
+	{ "ep4_rx", 5, },
+};
+
+static struct musb_hdrc_config musb_config = {
+	.multipoint	= true,
+	.dyn_fifo	= true,
+	.soft_con	= true,
+	.dma		= true,
+
+	.num_eps	= 5,
+	.dma_channels	= 8,
+	.ram_bits	= 10,
+	.eps_bits	= musb_eps,
+};
+
+static struct musb_hdrc_platform_data usb_data = {
+#if defined(CONFIG_USB_MUSB_OTG)
+	/* OTG requires a Mini-AB connector */
+	.mode           = MUSB_OTG,
+#elif defined(CONFIG_USB_MUSB_PERIPHERAL)
+	.mode           = MUSB_PERIPHERAL,
+#elif defined(CONFIG_USB_MUSB_HOST)
+	.mode           = MUSB_HOST,
+#endif
+	.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,
+	},
+};
+
+static u64 usb_dmamask = DMA_32BIT_MASK;
+
+static struct platform_device usb_dev = {
+	.name           = "musb_hdrc",
+	.id             = -1,
+	.dev = {
+		.platform_data		= &usb_data,
+		.dma_mask		= &usb_dmamask,
+		.coherent_dma_mask      = DMA_32BIT_MASK,
+	},
+	.resource       = usb_resources,
+	.num_resources  = ARRAY_SIZE(usb_resources),
+};
+
+#ifdef CONFIG_USB_MUSB_OTG
+
+static struct otg_transceiver *xceiv;
+
+struct otg_transceiver *otg_get_transceiver(void)
+{
+	if (xceiv)
+		get_device(xceiv->dev);
+	return xceiv;
+}
+EXPORT_SYMBOL(otg_get_transceiver);
+
+int otg_set_transceiver(struct otg_transceiver *x)
+{
+	if (xceiv && x)
+		return -EBUSY;
+	xceiv = x;
+	return 0;
+}
+EXPORT_SYMBOL(otg_set_transceiver);
+
+#endif
+
+void __init setup_usb(unsigned mA, unsigned potpgt_msec)
+{
+	usb_data.power = mA / 2;
+	usb_data.potpgt = potpgt_msec / 2;
+	platform_device_register(&usb_dev);
+}
+
+#else
+
+void __init setup_usb(unsigned mA, unsigned potpgt_msec)
+{
+}
+
+#endif  /* CONFIG_USB_MUSB_HDRC */
+