drivers: usb: common: add common code for usb drivers to use
Add common usb code which usb drivers makes use of it.
Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/usb/common/Makefile b/drivers/usb/common/Makefile
index 2f3d43d..2f46d38 100644
--- a/drivers/usb/common/Makefile
+++ b/drivers/usb/common/Makefile
@@ -3,5 +3,6 @@
# SPDX-License-Identifier: GPL-2.0+
#
+obj-$(CONFIG_DM_USB) += common.o
obj-$(CONFIG_USB_EHCI_FSL) += fsl-dt-fixup.o
obj-$(CONFIG_USB_XHCI_FSL) += fsl-dt-fixup.o
diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
new file mode 100644
index 0000000..35c2dc1
--- /dev/null
+++ b/drivers/usb/common/common.c
@@ -0,0 +1,40 @@
+/*
+ * Provides code common for host and device side USB.
+ *
+ * (C) Copyright 2016
+ * Texas Instruments Incorporated, <www.ti.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <libfdt.h>
+#include <linux/usb/otg.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const char *const usb_dr_modes[] = {
+ [USB_DR_MODE_UNKNOWN] = "",
+ [USB_DR_MODE_HOST] = "host",
+ [USB_DR_MODE_PERIPHERAL] = "peripheral",
+ [USB_DR_MODE_OTG] = "otg",
+};
+
+enum usb_dr_mode usb_get_dr_mode(int node)
+{
+ const void *fdt = gd->fdt_blob;
+ const char *dr_mode;
+ int i;
+
+ dr_mode = fdt_getprop(fdt, node, "dr_mode", NULL);
+ if (!dr_mode) {
+ error("usb dr_mode not found\n");
+ return USB_DR_MODE_UNKNOWN;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++)
+ if (!strcmp(dr_mode, usb_dr_modes[i]))
+ return i;
+
+ return USB_DR_MODE_UNKNOWN;
+}
diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
index 7ec5550..8f8ac6a 100644
--- a/include/linux/usb/otg.h
+++ b/include/linux/usb/otg.h
@@ -17,4 +17,13 @@
USB_DR_MODE_OTG,
};
+/**
+ * usb_get_dr_mode() - Get dual role mode for given device
+ * @node: Node offset to the given device
+ *
+ * The function gets phy interface string from property 'dr_mode',
+ * and returns the correspondig enum usb_dr_mode
+ */
+enum usb_dr_mode usb_get_dr_mode(int node);
+
#endif /* __LINUX_USB_OTG_H */