From: Sakari Ailus <sakari.ailus@xxxxxxxxx>
Subject: [PATCH] V4L: Add VIDIOC_G_PRIV_MEM
Some devices, for example image sensors, contain settings in their
EEPROM memory that are useful to userspace programs. VIDIOC_G_PRIV_MEM
can be used to read those settings.
This patch adds also the corresponding v4l2_int_device command.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxx>
---
include/linux/videodev2.h | 10 +++++++++-
include/media/v4l2-int-device.h | 3 +++
2 files changed, 12 insertions(+), 1 deletion(-)
Index: linux-omap-2.6/include/linux/videodev2.h
===================================================================
--- linux-omap-2.6.orig/include/linux/videodev2.h 2008-08-25 12:19:22.000000000 -0500
+++ linux-omap-2.6/include/linux/videodev2.h 2008-08-25 12:19:24.000000000 -0500
@@ -1352,6 +1352,13 @@
__u32 revision; /* chip revision, chip specific */
};
+/* VIDIOC_G_PRIV_MEM */
+struct v4l2_priv_mem {
+ __u32 offset; /* offset to data */
+ __u32 length; /* memory allocated to ptr or read length */
+ void *ptr; /* pointer to allocated memory */
+};
+
/*
* I O C T L C O D E S F O R V I D E O D E V I C E S
*
@@ -1423,8 +1430,9 @@
#define VIDIOC_DBG_G_REGISTER _IOWR('V', 80, struct v4l2_register)
#define VIDIOC_G_CHIP_IDENT _IOWR('V', 81, struct v4l2_chip_ident)
+#define VIDIOC_G_PRIV_MEM _IOWR('V', 82, struct v4l2_priv_mem)
#endif
-#define VIDIOC_S_HW_FREQ_SEEK _IOW('V', 82, struct v4l2_hw_freq_seek)
+#define VIDIOC_S_HW_FREQ_SEEK _IOW('V', 83, struct v4l2_hw_freq_seek)
#ifdef __OLD_VIDIOC_
/* for compatibility, will go away some day */
Index: linux-omap-2.6/include/media/v4l2-int-device.h
===================================================================
--- linux-omap-2.6.orig/include/media/v4l2-int-device.h 2008-08-25 12:19:10.000000000 -0500
+++ linux-omap-2.6/include/media/v4l2-int-device.h 2008-08-25 12:19:24.000000000 -0500
@@ -208,6 +208,8 @@
vidioc_int_init_num,
/* VIDIOC_INT_G_CHIP_IDENT */
vidioc_int_g_chip_ident_num,
+ /* VIDIOC_INT_G_PRIV_MEM */
+ vidioc_int_g_priv_mem_num,
/*
*
@@ -285,5 +287,6 @@
V4L2_INT_WRAPPER_0(reset);
V4L2_INT_WRAPPER_0(init);
V4L2_INT_WRAPPER_1(g_chip_ident, int, *);
+V4L2_INT_WRAPPER_1(g_priv_mem, struct v4l2_priv_mem, *);
#endif
--
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