V4L/DVB (8364): gspca: Support of powerline frequency for ov6650.

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 93 insertions, 7 deletions

diff --git a/drivers/media/video/gspca/sonixb.c b/drivers/media/video/gspca/sonixb.c
index a512772664a3..51435e3dbb10 100644
--- a/drivers/media/video/gspca/sonixb.c
+++ b/drivers/media/video/gspca/sonixb.c
@@ -44,6 +44,7 @@ struct sd {
         unsigned char brightness;
         unsigned char autogain;
         unsigned char autogain_ignore_frames;
+        unsigned char freq;             /* light freq filter setting */
 
         unsigned char fr_h_sz;          /* size of frame header */
         char sensor;                    /* Type of image sensor chip */
@@ -85,6 +86,8 @@ static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val);
 static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val);
 static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val);
 static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val);
+static int sd_setfreq(struct gspca_dev *gspca_dev, __s32 val);
+static int sd_getfreq(struct gspca_dev *gspca_dev, __s32 *val);
 
 static struct ctrl sd_ctrls[] = {
         {
@@ -147,6 +150,20 @@ static struct ctrl sd_ctrls[] = {
                 .set = sd_setautogain,
                 .get = sd_getautogain,
         },
+        {
+                {
+                        .id      = V4L2_CID_POWER_LINE_FREQUENCY,
+                        .type    = V4L2_CTRL_TYPE_MENU,
+                        .name    = "Light frequency filter",
+                        .minimum = 0,
+                        .maximum = 2,   /* 0: 0, 1: 50Hz, 2:60Hz */
+                        .step    = 1,
+#define FREQ_DEF 1
+                        .default_value = FREQ_DEF,
+                },
+                .set = sd_setfreq,
+                .get = sd_getfreq,
+        },
 };
 
 static struct v4l2_pix_format vga_mode[] = {
@@ -225,11 +242,6 @@ static const __u8 ov6650_sensor_init[][8] =
         /* Some more unknown stuff */
         {0xa0, 0x60, 0x68, 0x04, 0x68, 0xd8, 0xa4, 0x10},
         {0xd0, 0x60, 0x17, 0x24, 0xd6, 0x04, 0x94, 0x10}, /* Clipreg */
-        {0xa0, 0x60, 0x10, 0x57, 0x99, 0x04, 0x94, 0x16},
-        /* Framerate adjust register for artificial light 50 hz flicker
-           compensation, identical to ov6630 0x2b register, see 6630 datasheet.
-           0x4f -> (30 fps -> 25 fps), 0x00 -> no adjustment */
-        {0xa0, 0x60, 0x2b, 0x4f, 0x99, 0x04, 0x94, 0x15},
 };
 
 static const __u8 initOv7630[] = {
@@ -657,8 +669,12 @@ static void setexposure(struct gspca_dev *gspca_dev)
                 */
                 __u8 i2c[] = {0xb0, 0x60, 0x10, 0x00, 0xc0, 0x00, 0x00, 0x10};
                 int reg10, reg11;
-                /* No clear idea why, but setting reg10 above this value
-                   results in no change */
+                /* ov6645 datasheet says reg10_max is 9a, but that uses
+                   tline * 2 * reg10 as formula for calculating texpo, the
+                   ov6650 probably uses the same formula as the 7730 which uses
+                   tline * 4 * reg10, which explains why the reg10max we've
+                   found experimentally for the ov6650 is exactly half that of
+                   the ov6645. */
                 const int reg10_max = 0x4d;
 
                 reg11 = (60 * sd->exposure + 999) / 1000;
@@ -713,6 +729,34 @@ static void setexposure(struct gspca_dev *gspca_dev)
         }
 }
 
+static void setfreq(struct gspca_dev *gspca_dev)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+
+        switch (sd->sensor) {
+        case SENSOR_OV6650: {
+                /* Framerate adjust register for artificial light 50 hz flicker
+                   compensation, identical to ov6630 0x2b register, see ov6630
+                   datasheet.
+                   0x4f -> (30 fps -> 25 fps), 0x00 -> no adjustment */
+                __u8 i2c[] = {0xa0, 0x60, 0x2b, 0x00, 0x00, 0x00, 0x00, 0x10};
+                switch (sd->freq) {
+                default:
+/*              case 0:                  * no filter*/
+/*              case 2:                  * 60 hz */
+                        i2c[3] = 0;
+                        break;
+                case 1:                 /* 50 hz */
+                        i2c[3] = 0x4f;
+                        break;
+                }
+                if (i2c_w(gspca_dev, i2c) < 0)
+                        PDEBUG(D_ERR, "i2c error setfreq");
+                break;
+            }
+        }
+}
+
 
 static void do_autogain(struct gspca_dev *gspca_dev)
 {
@@ -746,6 +790,7 @@ static int sd_config(struct gspca_dev *gspca_dev,
         sd->fr_h_sz = 12;               /* default size of the frame header */
         sd->sd_desc.nctrls = 2;         /* default nb of ctrls */
         sd->autogain = AUTOGAIN_DEF;    /* default is autogain active */
+        sd->freq = FREQ_DEF;
 
         product = id->idProduct;
 /*      switch (id->idVendor) { */
@@ -1004,6 +1049,7 @@ static void sd_start(struct gspca_dev *gspca_dev)
         setgain(gspca_dev);
         setbrightness(gspca_dev);
         setexposure(gspca_dev);
+        setfreq(gspca_dev);
 
         sd->autogain_ignore_frames = 0;
         atomic_set(&sd->avg_lum, -1);
@@ -1161,6 +1207,45 @@ static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val)
         return 0;
 }
 
+static int sd_setfreq(struct gspca_dev *gspca_dev, __s32 val)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+
+        sd->freq = val;
+        if (gspca_dev->streaming)
+                setfreq(gspca_dev);
+        return 0;
+}
+
+static int sd_getfreq(struct gspca_dev *gspca_dev, __s32 *val)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+
+        *val = sd->freq;
+        return 0;
+}
+
+static int sd_querymenu(struct gspca_dev *gspca_dev,
+                        struct v4l2_querymenu *menu)
+{
+        switch (menu->id) {
+        case V4L2_CID_POWER_LINE_FREQUENCY:
+                switch (menu->index) {
+                case 0:         /* V4L2_CID_POWER_LINE_FREQUENCY_DISABLED */
+                        strcpy((char *) menu->name, "NoFliker");
+                        return 0;
+                case 1:         /* V4L2_CID_POWER_LINE_FREQUENCY_50HZ */
+                        strcpy((char *) menu->name, "50 Hz");
+                        return 0;
+                case 2:         /* V4L2_CID_POWER_LINE_FREQUENCY_60HZ */
+                        strcpy((char *) menu->name, "60 Hz");
+                        return 0;
+                }
+                break;
+        }
+        return -EINVAL;
+}
+
 /* sub-driver description */
 static const struct sd_desc sd_desc = {
         .name = MODULE_NAME,
@@ -1173,6 +1258,7 @@ static const struct sd_desc sd_desc = {
         .stop0 = sd_stop0,
         .close = sd_close,
         .pkt_scan = sd_pkt_scan,
+        .querymenu = sd_querymenu,
 };
 
 /* -- module initialisation -- */