[U-Boot] [PATCH RFC 3/6] dm: usb-host: Add UCLASS driver for USB

[Vivek Gautam]

Adding a UCLASS driver for USB based on driver-model, to facilitate
binding mutiple host-controllers to their respective drivers, and
thereby enable using mutiple controllers simultaneously on a platform.

Signed-off-by: Vivek Gautam <gautam.vivek at samsung.com>
---
 drivers/usb/host/Kconfig      |    9 ++++
 drivers/usb/host/Makefile     |    3 ++
 drivers/usb/host/usb-uclass.c |  107 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 119 insertions(+)
 create mode 100644 drivers/usb/host/usb-uclass.c

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 30d1457..fceacbb 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -3,6 +3,15 @@
 #
 comment "USB Host Controller Drivers"
 
+config DM_USB
+	bool "USB Driver model support"
+	---help---
+	  Driver model support for USB host controller drivers.
+	  This will allow use of mutiple kinds of host controllers viz. OHCI,
+	  EHCI, XHCI, etc simultaneously which was not possible till now.
+	  Say 'y' if you have mutiple types of controllers on your boards
+	  and would like to enable support for all of them.
+
 config USB_XHCI_HCD
 	bool "xHCI HCD (USB 3.0) support"
 	---help---
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 66d6e9a..d54e2a7 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -5,6 +5,9 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
+# usb driver-model
+obj-$(CONFIG_DM_USB) += usb-uclass.o
+
 # ohci
 obj-$(CONFIG_USB_OHCI_NEW) += ohci-hcd.o
 obj-$(CONFIG_USB_ATMEL) += ohci-at91.o
diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c
new file mode 100644
index 0000000..e7a97ec
--- /dev/null
+++ b/drivers/usb/host/usb-uclass.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2014 Samsung Electronics Co.Ltd
+ *
+ * Provides a smooth translation from usb_*() APIs from
+ * core usb drivers to controller drivers, enabling simultaneous
+ * use of different types of controller at once.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <linux/err.h>
+#include <asm/io.h>
+#include <usb.h>
+//#include <linux/list.h>
+
+//DECLARE_GLOBAL_DATA_PTR;
+
+UCLASS_DRIVER(usb) = {
+	.name		= "usb",
+	.id		= UCLASS_USB,
+};
+
+int usb_lowlevel_init(int index, enum usb_init_type init,
+			void **controller, struct udevice *udev_usb)
+{
+	const struct usb_ops *ops;
+
+	if (IS_ERR(udev_usb))
+		return -EINVAL;
+
+	ops = device_get_ops(udev_usb);
+
+	if (!ops->lowlevel_init)
+		return -ENOSYS;
+
+	return ops->lowlevel_init(index, init, controller);
+}
+
+int usb_lowlevel_stop(int index, struct udevice *udev_usb)
+{
+	const struct usb_ops *ops;
+
+	if (IS_ERR(udev_usb))
+		return -EINVAL;
+
+	ops = device_get_ops(udev_usb);
+
+	if (!ops->lowlevel_stop)
+		return -ENOSYS;
+
+	return ops->lowlevel_stop(index);
+}
+
+int usb_submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
+			void *buffer, int transfer_len,
+			struct udevice *udev_usb)
+{
+	const struct usb_ops *ops;
+
+	if (IS_ERR(udev_usb))
+		return -EINVAL;
+
+	ops = device_get_ops(udev_usb);
+
+	if (!ops->submit_bulk_msg)
+		return -ENOSYS;
+
+	return ops->submit_bulk_msg(dev, pipe, buffer, transfer_len);
+}
+
+int usb_submit_control_msg(struct usb_device *dev, unsigned long pipe,
+			void *buffer, int transfer_len,
+			struct devrequest *setup, struct udevice *udev_usb)
+{
+	const struct usb_ops *ops;
+
+	if (IS_ERR(udev_usb))
+		return -EINVAL;
+
+	ops = device_get_ops(udev_usb);
+
+	if (!ops->submit_ctrl_msg)
+		return -ENOSYS;
+
+	return ops->submit_ctrl_msg(dev,pipe, buffer, transfer_len, setup);
+}
+
+int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
+			void *buffer, int transfer_len,
+			int interval, struct udevice *udev_usb)
+{
+	const struct usb_ops *ops;
+
+	if (IS_ERR(udev_usb))
+		return -EINVAL;
+
+	ops = device_get_ops(udev_usb);
+
+	if (!ops->submit_int_msg)
+		return -ENOSYS;
+
+	return ops->submit_int_msg(dev, pipe, buffer, transfer_len, interval);
+}
-- 
1.7.10.4