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 bddfbb717064..4dc458597f40 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 a97dfbb15e57..4b522e5c70ec 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 000000000000..fe182a85159c
--- /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 */
+