[U-Boot] [PATCH 1/1] drivers: usb: common: add common code for usb drivers to use

[Mugunthan V N]

Add common usb code which usb drivers makes use of it.

Signed-off-by: Mugunthan V N <mugunthanvnm at ti.com>
---

This was in my musb dm bringup patch list, and I did dwc3 over
the same branch so missed submitting this patch for dwc3 bringup.
So submitting the dwc3 dependent patch separately and will drop
this while submitting v2 for musb.

Simon, before applying [1], can you apply this first so that the
dependents are met.

[1]: https://www.mail-archive.com/u-boot@lists.denx.de/msg206602.html

---
 Makefile                    |  1 +
 drivers/usb/common/Makefile |  8 ++++++++
 drivers/usb/common/common.c | 40 ++++++++++++++++++++++++++++++++++++++++
 include/linux/usb/otg.h     |  9 +++++++++
 4 files changed, 58 insertions(+)
 create mode 100644 drivers/usb/common/Makefile
 create mode 100644 drivers/usb/common/common.c

diff --git a/Makefile b/Makefile
index 6bb5565..664c8cc 100644
--- a/Makefile
+++ b/Makefile
@@ -657,6 +657,7 @@ libs-y += drivers/usb/musb/
 libs-y += drivers/usb/musb-new/
 libs-y += drivers/usb/phy/
 libs-y += drivers/usb/ulpi/
+libs-y += drivers/usb/common/
 libs-y += cmd/
 libs-y += common/
 libs-$(CONFIG_API) += api/
diff --git a/drivers/usb/common/Makefile b/drivers/usb/common/Makefile
new file mode 100644
index 0000000..9be2cdc
--- /dev/null
+++ b/drivers/usb/common/Makefile
@@ -0,0 +1,8 @@
+#
+# (C) Copyright 2016
+#     Texas Instruments Incorporated, <www.ti.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-$(CONFIG_DM_USB) += common.o
diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
new file mode 100644
index 0000000..ed9d993
--- /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 @@ enum usb_dr_mode {
 	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 */
-- 
2.8.1.101.g72d917a