video: tegra: add skeleton host bus support

The host (or host1x) bus sits between the cpu core and the 3d, 2d, camera,
display, and mpeg encoder functions.  It contains provides DMA channels,
hardware mutexes, and synchronization points.

Signed-off-by: Erik Gilling <konkers@android.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/include/linux/nvhost.h b/include/linux/nvhost.h
new file mode 100644
index 000000000000..c7db9d2ec30b
--- /dev/null
+++ b/include/linux/nvhost.h
@@ -0,0 +1,69 @@
+/*
+ * include/linux/nvhost.h
+ *
+ * Tegra graphics host driver
+ *
+ * Copyright (c) 2009-2010, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef __LINUX_NVHOST_H
+#define __LINUX_NVHOST_H
+
+#include <linux/device.h>
+
+struct nvhost_master;
+
+struct nvhost_device {
+	const char		*name;
+	struct device		dev;
+	int			id;
+	u32			num_resources;
+	struct resource		*resource;
+
+	struct nvhost_master	*host;
+};
+
+extern int nvhost_device_register(struct nvhost_device *);
+extern void nvhost_device_unregister(struct nvhost_device *);
+
+extern struct bus_type nvhost_bus_type;
+
+struct nvhost_driver {
+	int (*probe)(struct nvhost_device *);
+	int (*remove)(struct nvhost_device *);
+	void (*shutdown)(struct nvhost_device *);
+	int (*suspend)(struct nvhost_device *, pm_message_t state);
+	int (*resume)(struct nvhost_device *);
+	struct device_driver driver;
+};
+
+extern int nvhost_driver_register(struct nvhost_driver *);
+extern void nvhost_driver_unregister(struct nvhost_driver *);
+extern struct resource *nvhost_get_resource(struct nvhost_device *, unsigned int, unsigned int);
+extern int nvhost_get_irq(struct nvhost_device *, unsigned int);
+extern struct resource *nvhost_get_resource_byname(struct nvhost_device *, unsigned int, const char *);
+extern int nvhost_get_irq_byname(struct nvhost_device *, const char *);
+
+#define to_nvhost_device(x) container_of((x), struct nvhost_device, dev)
+#define to_nvhost_driver(drv)	(container_of((drv), struct nvhost_driver, \
+				 driver))
+
+#define nvhost_get_drvdata(_dev)	dev_get_drvdata(&(_dev)->dev)
+#define nvhost_set_drvdata(_dev,data)	dev_set_drvdata(&(_dev)->dev, (data))
+
+int nvhost_bus_register(struct nvhost_master *host);
+#endif