V4L/DVB (8342): sh_mobile_ceu_camera: Add SuperH Mobile CEU driver V3

This is V3 of the SuperH Mobile CEU soc_camera driver.

The CEU hardware block is configured in a transparent data fetch
mode, frames are captured from the attached camera and written to
physically contiguous memory buffers provided by the newly added
videobuf-dma-contig queue. Tested on sh7722 and sh7723 processors.

 Changes since V2:
 - remove SUPERH Kconfig dependency
 - move sh_mobile_ceu.h to include/media
 - add board callback support with enable_camera()/disable_camera()
 - add support for declare_coherent_memory
 - rework video memory limit
 - more verbose error messages

 Changes since V1:
 - fixed the CEU driver to work with the newly updated patches
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/Kconfig

@@ -969,4 +969,12 @@ config VIDEO_PXA27x
 	---help---
 	  This is a v4l2 driver for the PXA27x Quick Capture Interface
 
+config VIDEO_SH_MOBILE_CEU
+	tristate "SuperH Mobile CEU Interface driver"
+	depends on VIDEO_DEV
+	select SOC_CAMERA
+	select VIDEOBUF_DMA_CONTIG
+	---help---
+	  This is a v4l2 driver for the SuperH Mobile CEU Interface
+
 endif # VIDEO_CAPTURE_DRIVERS

drivers/media/video/Makefile

@@ -133,6 +133,7 @@ obj-$(CONFIG_VIDEO_VIVI) += vivi.o
 obj-$(CONFIG_VIDEO_CX23885) += cx23885/
 
 obj-$(CONFIG_VIDEO_PXA27x)	+= pxa_camera.o
+obj-$(CONFIG_VIDEO_SH_MOBILE_CEU)	+= sh_mobile_ceu_camera.o
 obj-$(CONFIG_SOC_CAMERA)	+= soc_camera.o
 obj-$(CONFIG_SOC_CAMERA_MT9M001)	+= mt9m001.o
 obj-$(CONFIG_SOC_CAMERA_MT9V022)	+= mt9v022.o

include/media/sh_mobile_ceu.h

+#ifndef __ASM_SH_MOBILE_CEU_H__
+#define __ASM_SH_MOBILE_CEU_H__
+
+#include <media/soc_camera.h>
+
+struct sh_mobile_ceu_info {
+	unsigned long flags; /* SOCAM_... */
+	void (*enable_camera)(void);
+	void (*disable_camera)(void);
+};
+
+#endif /* __ASM_SH_MOBILE_CEU_H__ */