V4L/DVB (4662): Pvrusb2: Implement VIDIOC_INT_[G|S]_REGISTER

Implement VIDIOC_INT_SET_REGISTER and VIDIOC_INT_GET_REGISTER for the
pvrusb2 driver.  This is a debugging aid which will not be enabled
unless CONFIG_VIDEO_ADV_DEBUG has been enabled.

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index 88604365777c..11a327d167be 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -24,6 +24,7 @@
 #include <linux/slab.h>
 #include <linux/firmware.h>
 #include <linux/videodev2.h>
+#include <media/v4l2-common.h>
 #include <asm/semaphore.h>
 #include "pvrusb2.h"
 #include "pvrusb2-std.h"
@@ -3131,6 +3132,37 @@ static int pvr2_hdw_get_eeprom_addr(struct pvr2_hdw *hdw)
 }
 
 
+int pvr2_hdw_register_access(struct pvr2_hdw *hdw,
+                             u32 chip_id,unsigned long reg_id,
+                             int setFl,u32 *val_ptr)
+{
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+        struct list_head *item;
+        struct pvr2_i2c_client *cp;
+        struct v4l2_register req;
+        int stat;
+
+        req.i2c_id = chip_id;
+        req.reg = reg_id;
+        if (setFl) req.val = *val_ptr;
+        mutex_lock(&hdw->i2c_list_lock); do {
+                list_for_each(item,&hdw->i2c_clients) {
+                        cp = list_entry(item,struct pvr2_i2c_client,list);
+                        if (cp->client->driver->id != chip_id) continue;
+                        stat = pvr2_i2c_client_cmd(
+                                cp,(setFl ? VIDIOC_INT_S_REGISTER :
+                                    VIDIOC_INT_G_REGISTER),&req);
+                        if (!setFl) *val_ptr = req.val;
+                        return stat;
+                }
+        } while (0); mutex_unlock(&hdw->i2c_list_lock);
+        return -EINVAL;
+#else
+        return -ENOSYS;
+#endif
+}
+
+
 /*
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   *** Local Variables: ***