V4L/DVB (8669): gspca: Add white balance control for spca561 rev 012A.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 92 insertions, 18 deletions

diff --git a/drivers/media/video/gspca/spca561.c b/drivers/media/video/gspca/spca561.c
index 1073ac3d2ec6..02e274452c46 100644
--- a/drivers/media/video/gspca/spca561.c
+++ b/drivers/media/video/gspca/spca561.c
@@ -34,6 +34,7 @@ struct sd {
 
         unsigned short contrast;
         __u8 brightness;
+        __u8 white;
         __u8 autogain;
 
         __u8 chip_revision;
@@ -46,11 +47,12 @@ static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
 static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val);
 static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val);
 static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val);
+static int sd_setwhite(struct gspca_dev *gspca_dev, __s32 val);
+static int sd_getwhite(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 struct ctrl sd_ctrls[] = {
-#define SD_BRIGHTNESS 0
         {
          {
           .id = V4L2_CID_BRIGHTNESS,
@@ -59,12 +61,12 @@ static struct ctrl sd_ctrls[] = {
           .minimum = 0,
           .maximum = 63,
           .step = 1,
-          .default_value = 32,
+#define BRIGHTNESS_DEF 32
+                .default_value = BRIGHTNESS_DEF,
           },
          .set = sd_setbrightness,
          .get = sd_getbrightness,
          },
-#define SD_CONTRAST 1
         {
          {
           .id = V4L2_CID_CONTRAST,
@@ -73,12 +75,26 @@ static struct ctrl sd_ctrls[] = {
           .minimum = 0,
           .maximum = 0x3fff,
           .step = 1,
-          .default_value = 0x2000,
+#define CONTRAST_DEF 0x2000
+                .default_value = CONTRAST_DEF,
           },
          .set = sd_setcontrast,
          .get = sd_getcontrast,
          },
-#define SD_AUTOGAIN 2
+        {
+            {
+                .id = V4L2_CID_DO_WHITE_BALANCE,
+                .type = V4L2_CTRL_TYPE_INTEGER,
+                .name = "While Balance",
+                .minimum = 0,
+                .maximum = 0x7f,
+                .step = 1,
+#define WHITE_DEF 40
+                .default_value = WHITE_DEF,
+                },
+                .set = sd_setwhite,
+                .get = sd_getwhite,
+            },
         {
          {
           .id = V4L2_CID_AUTOGAIN,
@@ -87,7 +103,8 @@ static struct ctrl sd_ctrls[] = {
           .minimum = 0,
           .maximum = 1,
           .step = 1,
-          .default_value = 1,
+#define AUTOGAIN_DEF 1
+          .default_value = AUTOGAIN_DEF,
           },
          .set = sd_setautogain,
          .get = sd_getautogain,
@@ -438,7 +455,7 @@ static const __u16 spca561_init_data[][2] = {
         {0x0035, 0x8801},       /* 0x14 - set gain general */
         {0x001f, 0x8805},       /* 0x14 */
         {0x0000, 0x8800},
-        {0x0030, 0x8112},
+        {0x000e, 0x8112},       /* white balance - was 30 */
         {}
 };
 
@@ -478,9 +495,10 @@ static const __u16 Pb100_2map8300[][2] = {
 };
 
 static const __u16 spca561_161rev12A_data1[][2] = {
-        {0x21, 0x8118},
-        {0x01, 0x8114},
-        {0x00, 0x8112},
+        {0x29, 0x8118},         /* white balance - was 21 */
+        {0x08, 0x8114},         /* white balance - was 01 */
+        {0x0e, 0x8112},         /* white balance - was 00 */
+        {0x00, 0x8102},         /* white balance - new */
         {0x92, 0x8804},
         {0x04, 0x8802},         /* windows uses 08 */
         {}
@@ -505,14 +523,16 @@ static const __u16 spca561_161rev12A_data2[][2] = {
         {0xb0, 0x8603},
 
         /* sensor gains */
+        {0x07, 0x8601},         /* white balance - new */
+        {0x07, 0x8602},         /* white balance - new */
         {0x00, 0x8610},         /* *red */
         {0x00, 0x8611},         /* 3f   *green */
         {0x00, 0x8612},         /* green *blue */
         {0x00, 0x8613},         /* blue *green */
-        {0x35, 0x8614},         /* green *red */
-        {0x35, 0x8615},         /* 40   *green */
-        {0x35, 0x8616},         /* 7a   *blue */
-        {0x35, 0x8617},         /* 40   *green */
+        {0x43, 0x8614},         /* green *red - white balance - was 0x35 */
+        {0x40, 0x8615},         /* 40   *green - white balance - was 0x35 */
+        {0x71, 0x8616},         /* 7a   *blue - white balance - was 0x35 */
+        {0x40, 0x8617},         /* 40   *green - white balance - was 0x35 */
 
         {0x0c, 0x8620},         /* 0c */
         {0xc8, 0x8631},         /* c8 */
@@ -527,6 +547,7 @@ static const __u16 spca561_161rev12A_data2[][2] = {
         {0xdf, 0x863c},         /* df */
         {0xf0, 0x8505},
         {0x32, 0x850a},
+        {0x99, 0x8700},         /* - white balance - new */
         {}
 };
 
@@ -588,9 +609,10 @@ static int sd_config(struct gspca_dev *gspca_dev,
         cam->nmodes = sizeof sif_mode / sizeof sif_mode[0];
 
         sd->chip_revision = id->driver_info;
-        sd->brightness = sd_ctrls[SD_BRIGHTNESS].qctrl.default_value;
-        sd->contrast = sd_ctrls[SD_CONTRAST].qctrl.default_value;
-        sd->autogain = sd_ctrls[SD_AUTOGAIN].qctrl.default_value;
+        sd->brightness = BRIGHTNESS_DEF;
+        sd->contrast = CONTRAST_DEF;
+        sd->autogain = AUTOGAIN_DEF;
+        sd->white = WHITE_DEF;
         return 0;
 }
 
@@ -628,15 +650,18 @@ static void setcontrast(struct gspca_dev *gspca_dev)
                 reg_w_val(dev, lowb, 0x8653);
                 reg_w_val(dev, lowb, 0x8654);
                 break;
-        case Rev012A: {
+        default: {
+/*      case Rev012A: { */
                 __u8 Reg8391[] =
                         { 0x00, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00 };
 
                 /* Write camera sensor settings */
                 expotimes = (sd->contrast >> 5) & 0x07ff;
+                /* exposure is in 8309 2b, range 0120 - 5720 */
                 Reg8391[0] = expotimes & 0xff;  /* exposure */
                 Reg8391[1] = 0x18 | (expotimes >> 8);
                 Reg8391[2] = sd->brightness;    /* gain */
+                /* gain in 8335, 2b range 0000 - 2400 */
                 reg_w_buf(gspca_dev, 0x8391, Reg8391, 8);
                 reg_w_buf(gspca_dev, 0x8390, Reg8391, 8);
                 break;
@@ -644,6 +669,34 @@ static void setcontrast(struct gspca_dev *gspca_dev)
         }
 }
 
+static void setwhite(struct gspca_dev *gspca_dev)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        __u16 white;
+        __u8 reg8614, reg8616;
+
+        switch (sd->chip_revision) {
+        case Rev072A:
+                /* no such hardware */
+                break;
+        default:
+/*      case Rev012A: */
+                white = sd->white;
+                if (sd->white == 0) {
+                        PDEBUG(D_CONF, "Discarding null whiteness");
+                        break;
+                }
+                /* try to emulate MS-win as possible */
+                if (white < 0x45)
+                        reg8616 = white;
+                else
+                        reg8616 = 0x93 + (white >> 2);
+                reg8614 = 0x28 + (white >> 4);
+                reg_w_val(gspca_dev->dev, reg8616, 0x8616);
+                reg_w_val(gspca_dev->dev, reg8614, 0x8614);
+        }
+}
+
 static void setautogain(struct gspca_dev *gspca_dev)
 {
         struct sd *sd = (struct sd *) gspca_dev;
@@ -714,6 +767,7 @@ static void sd_start(struct gspca_dev *gspca_dev)
                 reg_w_val(gspca_dev->dev, 0x8112, 0x1e | 0x20);
                 reg_w_val(gspca_dev->dev, 0x850b, 0x03);
                 setcontrast(gspca_dev);
+                setwhite(gspca_dev);
                 break;
         }
 }
@@ -721,6 +775,7 @@ static void sd_start(struct gspca_dev *gspca_dev)
 static void sd_stopN(struct gspca_dev *gspca_dev)
 {
         reg_w_val(gspca_dev->dev, 0x8112, 0x20);
+        reg_w_val(gspca_dev->dev, 0x8102, 0x00); /* white balance - new */
 }
 
 static void sd_stop0(struct gspca_dev *gspca_dev)
@@ -968,6 +1023,25 @@ static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val)
         return 0;
 }
 
+/* white balance - new */
+static int sd_setwhite(struct gspca_dev *gspca_dev, __s32 val)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+
+        sd->white = val;
+        if (gspca_dev->streaming)
+                setwhite(gspca_dev);
+        return 0;
+}
+
+static int sd_getwhite(struct gspca_dev *gspca_dev, __s32 *val)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+
+        *val = sd->white;
+        return 0;
+}
+
 /* sub-driver description */
 static const struct sd_desc sd_desc = {
         .name = MODULE_NAME,