V4L/DVB (10719): bt819: convert to v4l2_subdev.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 252 insertions, 225 deletions

diff --git a/drivers/media/video/bt819.c b/drivers/media/video/bt819.c
index b8109a1b50ce..ce2a8f3ef64d 100644
--- a/drivers/media/video/bt819.c
+++ b/drivers/media/video/bt819.c
@@ -29,15 +29,14 @@
  */
 
 #include <linux/module.h>
-#include <linux/delay.h>
 #include <linux/types.h>
 #include <linux/ioctl.h>
 #include <asm/uaccess.h>
 #include <linux/i2c.h>
 #include <linux/i2c-id.h>
-#include <linux/videodev.h>
-#include <linux/video_decoder.h>
-#include <media/v4l2-common.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
 #include <media/v4l2-i2c-drv-legacy.h>
 
 MODULE_DESCRIPTION("Brooktree-819 video decoder driver");
@@ -48,13 +47,18 @@ static int debug;
 module_param(debug, int, 0);
 MODULE_PARM_DESC(debug, "Debug level (0-1)");
 
+static unsigned short normal_i2c[] = { 0x8a >> 1, I2C_CLIENT_END };
+
+I2C_CLIENT_INSMOD;
+
 /* ----------------------------------------------------------------------- */
 
 struct bt819 {
+        struct v4l2_subdev sd;
         unsigned char reg[32];
 
-        int initialized;
         v4l2_std_id norm;
+        int ident;
         int input;
         int enable;
         int bright;
@@ -63,6 +67,11 @@ struct bt819 {
         int sat;
 };
 
+static inline struct bt819 *to_bt819(struct v4l2_subdev *sd)
+{
+        return container_of(sd, struct bt819, sd);
+}
+
 struct timing {
         int hactive;
         int hdelay;
@@ -80,24 +89,23 @@ static struct timing timing_data[] = {
 
 /* ----------------------------------------------------------------------- */
 
-static inline int bt819_write(struct i2c_client *client, u8 reg, u8 value)
+static inline int bt819_write(struct bt819 *decoder, u8 reg, u8 value)
 {
-        struct bt819 *decoder = i2c_get_clientdata(client);
+        struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
 
         decoder->reg[reg] = value;
         return i2c_smbus_write_byte_data(client, reg, value);
 }
 
-static inline int bt819_setbit(struct i2c_client *client, u8 reg, u8 bit, u8 value)
+static inline int bt819_setbit(struct bt819 *decoder, u8 reg, u8 bit, u8 value)
 {
-        struct bt819 *decoder = i2c_get_clientdata(client);
-
-        return bt819_write(client, reg,
+        return bt819_write(decoder, reg,
                 (decoder->reg[reg] & ~(1 << bit)) | (value ? (1 << bit) : 0));
 }
 
-static int bt819_write_block(struct i2c_client *client, const u8 *data, unsigned int len)
+static int bt819_write_block(struct bt819 *decoder, const u8 *data, unsigned int len)
 {
+        struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
         int ret = -1;
         u8 reg;
 
@@ -105,7 +113,6 @@ static int bt819_write_block(struct i2c_client *client, const u8 *data, unsigned
          * the adapter understands raw I2C */
         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
                 /* do raw I2C, not smbus compatible */
-                struct bt819 *decoder = i2c_get_clientdata(client);
                 u8 block_data[32];
                 int block_len;
 
@@ -126,7 +133,8 @@ static int bt819_write_block(struct i2c_client *client, const u8 *data, unsigned
                 /* do some slow I2C emulation kind of thing */
                 while (len >= 2) {
                         reg = *data++;
-                        if ((ret = bt819_write(client, reg, *data++)) < 0)
+                        ret = bt819_write(decoder, reg, *data++);
+                        if (ret < 0)
                                 break;
                         len -= 2;
                 }
@@ -135,15 +143,15 @@ static int bt819_write_block(struct i2c_client *client, const u8 *data, unsigned
         return ret;
 }
 
-static inline int bt819_read(struct i2c_client *client, u8 reg)
+static inline int bt819_read(struct bt819 *decoder, u8 reg)
 {
+        struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
+
         return i2c_smbus_read_byte_data(client, reg);
 }
 
-static int bt819_init(struct i2c_client *client)
+static int bt819_init(struct v4l2_subdev *sd)
 {
-        struct bt819 *decoder = i2c_get_clientdata(client);
-
         static unsigned char init[] = {
                 /*0x1f, 0x00,*/     /* Reset */
                 0x01, 0x59,     /* 0x01 input format */
@@ -178,6 +186,7 @@ static int bt819_init(struct i2c_client *client)
                 0x1a, 0x80,     /* 0x1a ADC Interface */
         };
 
+        struct bt819 *decoder = to_bt819(sd);
         struct timing *timing = &timing_data[(decoder->norm & V4L2_STD_525_60) ? 1 : 0];
 
         init[0x03 * 2 - 1] =
@@ -194,277 +203,297 @@ static int bt819_init(struct i2c_client *client)
         /* 0x15 in array is address 0x19 */
         init[0x15 * 2 - 1] = (decoder->norm & V4L2_STD_625_50) ? 115 : 93;      /* Chroma burst delay */
         /* reset */
-        bt819_write(client, 0x1f, 0x00);
+        bt819_write(decoder, 0x1f, 0x00);
         mdelay(1);
 
         /* init */
-        return bt819_write_block(client, init, sizeof(init));
+        return bt819_write_block(decoder, init, sizeof(init));
 }
 
 /* ----------------------------------------------------------------------- */
 
-static int bt819_command(struct i2c_client *client, unsigned cmd, void *arg)
+static int bt819_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
 {
-        int temp;
+        struct bt819 *decoder = to_bt819(sd);
+        int status = bt819_read(decoder, 0x00);
+        int res = V4L2_IN_ST_NO_SIGNAL;
+        v4l2_std_id std;
+
+        if ((status & 0x80))
+                res = 0;
+
+        if ((status & 0x10))
+                std = V4L2_STD_PAL;
+        else
+                std = V4L2_STD_NTSC;
+        if (pstd)
+                *pstd = std;
+        if (pstatus)
+                *pstatus = status;
+
+        v4l2_dbg(1, debug, sd, "get status %x\n", status);
+        return 0;
+}
 
-        struct bt819 *decoder = i2c_get_clientdata(client);
+static int bt819_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
+{
+        return bt819_status(sd, NULL, std);
+}
 
-        if (!decoder->initialized) {    /* First call to bt819_init could be */
-                bt819_init(client);     /* without #FRST = 0 */
-                decoder->initialized = 1;
+static int bt819_g_input_status(struct v4l2_subdev *sd, u32 *status)
+{
+        return bt819_status(sd, status, NULL);
+}
+
+static int bt819_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
+{
+        struct bt819 *decoder = to_bt819(sd);
+        struct timing *timing = NULL;
+
+        v4l2_dbg(1, debug, sd, "set norm %llx\n", std);
+
+        if (std & V4L2_STD_NTSC) {
+                bt819_setbit(decoder, 0x01, 0, 1);
+                bt819_setbit(decoder, 0x01, 1, 0);
+                bt819_setbit(decoder, 0x01, 5, 0);
+                bt819_write(decoder, 0x18, 0x68);
+                bt819_write(decoder, 0x19, 0x5d);
+                /* bt819_setbit(decoder, 0x1a,  5, 1); */
+                timing = &timing_data[1];
+        } else if (std & V4L2_STD_PAL) {
+                bt819_setbit(decoder, 0x01, 0, 1);
+                bt819_setbit(decoder, 0x01, 1, 1);
+                bt819_setbit(decoder, 0x01, 5, 1);
+                bt819_write(decoder, 0x18, 0x7f);
+                bt819_write(decoder, 0x19, 0x72);
+                /* bt819_setbit(decoder, 0x1a,  5, 0); */
+                timing = &timing_data[0];
+        } else {
+                v4l2_dbg(1, debug, sd, "unsupported norm %llx\n", std);
+                return -EINVAL;
         }
+        bt819_write(decoder, 0x03,
+                        (((timing->vdelay >> 8) & 0x03) << 6) |
+                        (((timing->vactive >> 8) & 0x03) << 4) |
+                        (((timing->hdelay >> 8) & 0x03) << 2) |
+                        ((timing->hactive >> 8) & 0x03));
+        bt819_write(decoder, 0x04, timing->vdelay & 0xff);
+        bt819_write(decoder, 0x05, timing->vactive & 0xff);
+        bt819_write(decoder, 0x06, timing->hdelay & 0xff);
+        bt819_write(decoder, 0x07, timing->hactive & 0xff);
+        bt819_write(decoder, 0x08, (timing->hscale >> 8) & 0xff);
+        bt819_write(decoder, 0x09, timing->hscale & 0xff);
+        decoder->norm = std;
+        return 0;
+}
 
-        switch (cmd) {
-        case VIDIOC_INT_INIT:
-                /* This is just for testing!!! */
-                bt819_init(client);
-                break;
+static int bt819_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
+{
+        struct bt819 *decoder = to_bt819(sd);
 
-        case VIDIOC_QUERYSTD:
-        case VIDIOC_INT_G_INPUT_STATUS: {
-                int *iarg = arg;
-                v4l2_std_id *istd = arg;
-                int status;
-                int res = V4L2_IN_ST_NO_SIGNAL;
-                v4l2_std_id std;
-
-                status = bt819_read(client, 0x00);
-                if ((status & 0x80))
-                        res = 0;
-
-                if ((status & 0x10))
-                        std = V4L2_STD_PAL;
-                else
-                        std = V4L2_STD_NTSC;
-                if (cmd == VIDIOC_QUERYSTD)
-                        *istd = std;
-                else
-                        *iarg = res;
-
-                v4l_dbg(1, debug, client, "get status %x\n", *iarg);
-                break;
-        }
+        v4l2_dbg(1, debug, sd, "set input %x\n", route->input);
 
-        case VIDIOC_S_STD:
-        {
-                v4l2_std_id *iarg = arg;
-                struct timing *timing = NULL;
-
-                v4l_dbg(1, debug, client, "set norm %llx\n", *iarg);
-
-                if (*iarg & V4L2_STD_NTSC) {
-                        bt819_setbit(client, 0x01, 0, 1);
-                        bt819_setbit(client, 0x01, 1, 0);
-                        bt819_setbit(client, 0x01, 5, 0);
-                        bt819_write(client, 0x18, 0x68);
-                        bt819_write(client, 0x19, 0x5d);
-                        /* bt819_setbit(client, 0x1a,  5, 1); */
-                        timing = &timing_data[1];
-                } else if (*iarg & V4L2_STD_PAL) {
-                        bt819_setbit(client, 0x01, 0, 1);
-                        bt819_setbit(client, 0x01, 1, 1);
-                        bt819_setbit(client, 0x01, 5, 1);
-                        bt819_write(client, 0x18, 0x7f);
-                        bt819_write(client, 0x19, 0x72);
-                        /* bt819_setbit(client, 0x1a,  5, 0); */
-                        timing = &timing_data[0];
-                } else {
-                        v4l_dbg(1, debug, client, "unsupported norm %llx\n", *iarg);
-                        return -EINVAL;
-                }
-/*              case VIDEO_MODE_AUTO:
-                        bt819_setbit(client, 0x01, 0, 0);
-                        bt819_setbit(client, 0x01, 1, 0);*/
-
-                bt819_write(client, 0x03,
-                            (((timing->vdelay >> 8) & 0x03) << 6) |
-                            (((timing->vactive >> 8) & 0x03) << 4) |
-                            (((timing->hdelay >> 8) & 0x03) << 2) |
-                             ((timing->hactive >> 8) & 0x03));
-                bt819_write(client, 0x04, timing->vdelay & 0xff);
-                bt819_write(client, 0x05, timing->vactive & 0xff);
-                bt819_write(client, 0x06, timing->hdelay & 0xff);
-                bt819_write(client, 0x07, timing->hactive & 0xff);
-                bt819_write(client, 0x08, (timing->hscale >> 8) & 0xff);
-                bt819_write(client, 0x09, timing->hscale & 0xff);
-                decoder->norm = *iarg;
-                break;
-        }
+        if (route->input < 0 || route->input > 7)
+                return -EINVAL;
 
-        case VIDIOC_INT_S_VIDEO_ROUTING:
-        {
-                struct v4l2_routing *route = arg;
-
-                v4l_dbg(1, debug, client, "set input %x\n", route->input);
-
-                if (route->input < 0 || route->input > 7)
-                        return -EINVAL;
-
-                if (decoder->input != route->input) {
-                        decoder->input = route->input;
-                        /* select mode */
-                        if (decoder->input == 0) {
-                                bt819_setbit(client, 0x0b, 6, 0);
-                                bt819_setbit(client, 0x1a, 1, 1);
-                        } else {
-                                bt819_setbit(client, 0x0b, 6, 1);
-                                bt819_setbit(client, 0x1a, 1, 0);
-                        }
+        if (decoder->input != route->input) {
+                decoder->input = route->input;
+                /* select mode */
+                if (decoder->input == 0) {
+                        bt819_setbit(decoder, 0x0b, 6, 0);
+                        bt819_setbit(decoder, 0x1a, 1, 1);
+                } else {
+                        bt819_setbit(decoder, 0x0b, 6, 1);
+                        bt819_setbit(decoder, 0x1a, 1, 0);
                 }
-                break;
         }
+        return 0;
+}
 
-        case VIDIOC_STREAMON:
-        case VIDIOC_STREAMOFF:
-        {
-                int enable = cmd == VIDIOC_STREAMON;
+static int bt819_s_stream(struct v4l2_subdev *sd, int enable)
+{
+        struct bt819 *decoder = to_bt819(sd);
 
-                v4l_dbg(1, debug, client, "enable output %x\n", enable);
+        v4l2_dbg(1, debug, sd, "enable output %x\n", enable);
 
-                if (decoder->enable != enable) {
-                        decoder->enable = enable;
-                        bt819_setbit(client, 0x16, 7, !enable);
-                }
-                break;
+        if (decoder->enable != enable) {
+                decoder->enable = enable;
+                bt819_setbit(decoder, 0x16, 7, !enable);
         }
+        return 0;
+}
 
-        case VIDIOC_QUERYCTRL:
-        {
-                struct v4l2_queryctrl *qc = arg;
-
-                switch (qc->id) {
-                case V4L2_CID_BRIGHTNESS:
-                        v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
-                        break;
-
-                case V4L2_CID_CONTRAST:
-                        v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
-                        break;
+static int bt819_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
+{
+        switch (qc->id) {
+        case V4L2_CID_BRIGHTNESS:
+                v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
+                break;
 
-                case V4L2_CID_SATURATION:
-                        v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
-                        break;
+        case V4L2_CID_CONTRAST:
+                v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
+                break;
 
-                case V4L2_CID_HUE:
-                        v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
-                        break;
+        case V4L2_CID_SATURATION:
+                v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
+                break;
 
-                default:
-                        return -EINVAL;
-                }
+        case V4L2_CID_HUE:
+                v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
                 break;
+
+        default:
+                return -EINVAL;
         }
+        return 0;
+}
 
-        case VIDIOC_S_CTRL:
-        {
-                struct v4l2_control *ctrl = arg;
+static int bt819_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+        struct bt819 *decoder = to_bt819(sd);
+        int temp;
 
-                switch (ctrl->id) {
-                case V4L2_CID_BRIGHTNESS:
-                        if (decoder->bright != ctrl->value) {
-                                decoder->bright = ctrl->value;
-                                bt819_write(client, 0x0a, decoder->bright);
-                        }
+        switch (ctrl->id) {
+        case V4L2_CID_BRIGHTNESS:
+                if (decoder->bright == ctrl->value)
                         break;
+                decoder->bright = ctrl->value;
+                bt819_write(decoder, 0x0a, decoder->bright);
+                break;
 
-                case V4L2_CID_CONTRAST:
-                        if (decoder->contrast != ctrl->value) {
-                                decoder->contrast = ctrl->value;
-                                bt819_write(client, 0x0c,
-                                                decoder->contrast & 0xff);
-                                bt819_setbit(client, 0x0b, 2,
-                                                ((decoder->contrast >> 8) & 0x01));
-                        }
+        case V4L2_CID_CONTRAST:
+                if (decoder->contrast == ctrl->value)
                         break;
+                decoder->contrast = ctrl->value;
+                bt819_write(decoder, 0x0c, decoder->contrast & 0xff);
+                bt819_setbit(decoder, 0x0b, 2, ((decoder->contrast >> 8) & 0x01));
+                break;
 
-                case V4L2_CID_SATURATION:
-                        if (decoder->sat != ctrl->value) {
-                                decoder->sat = ctrl->value;
-                                bt819_write(client, 0x0d,
-                                                (decoder->sat >> 7) & 0xff);
-                                bt819_setbit(client, 0x0b, 1,
-                                                ((decoder->sat >> 15) & 0x01));
-
-                                /* Ratio between U gain and V gain must stay the same as
-                                   the ratio between the default U and V gain values. */
-                                temp = (decoder->sat * 180) / 254;
-                                bt819_write(client, 0x0e, (temp >> 7) & 0xff);
-                                bt819_setbit(client, 0x0b, 0, (temp >> 15) & 0x01);
-                        }
+        case V4L2_CID_SATURATION:
+                if (decoder->sat == ctrl->value)
                         break;
+                decoder->sat = ctrl->value;
+                bt819_write(decoder, 0x0d, (decoder->sat >> 7) & 0xff);
+                bt819_setbit(decoder, 0x0b, 1, ((decoder->sat >> 15) & 0x01));
+
+                /* Ratio between U gain and V gain must stay the same as
+                   the ratio between the default U and V gain values. */
+                temp = (decoder->sat * 180) / 254;
+                bt819_write(decoder, 0x0e, (temp >> 7) & 0xff);
+                bt819_setbit(decoder, 0x0b, 0, (temp >> 15) & 0x01);
+                break;
 
-                case V4L2_CID_HUE:
-                        if (decoder->hue != ctrl->value) {
-                                decoder->hue = ctrl->value;
-                                bt819_write(client, 0x0f, decoder->hue);
-                        }
+        case V4L2_CID_HUE:
+                if (decoder->hue == ctrl->value)
                         break;
-                default:
-                        return -EINVAL;
-                }
+                decoder->hue = ctrl->value;
+                bt819_write(decoder, 0x0f, decoder->hue);
                 break;
+
+        default:
+                return -EINVAL;
         }
+        return 0;
+}
 
-        case VIDIOC_G_CTRL:
-        {
-                struct v4l2_control *ctrl = arg;
+static int bt819_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+        struct bt819 *decoder = to_bt819(sd);
 
-                switch (ctrl->id) {
-                case V4L2_CID_BRIGHTNESS:
-                        ctrl->value = decoder->bright;
-                        break;
-                case V4L2_CID_CONTRAST:
-                        ctrl->value = decoder->contrast;
-                        break;
-                case V4L2_CID_SATURATION:
-                        ctrl->value = decoder->sat;
-                        break;
-                case V4L2_CID_HUE:
-                        ctrl->value = decoder->hue;
-                        break;
-                default:
-                        return -EINVAL;
-                }
+        switch (ctrl->id) {
+        case V4L2_CID_BRIGHTNESS:
+                ctrl->value = decoder->bright;
+                break;
+        case V4L2_CID_CONTRAST:
+                ctrl->value = decoder->contrast;
+                break;
+        case V4L2_CID_SATURATION:
+                ctrl->value = decoder->sat;
+                break;
+        case V4L2_CID_HUE:
+                ctrl->value = decoder->hue;
                 break;
-        }
-
         default:
                 return -EINVAL;
         }
-
         return 0;
 }
 
+static int bt819_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
+{
+        struct bt819 *decoder = to_bt819(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
+}
+
+static int bt819_command(struct i2c_client *client, unsigned cmd, void *arg)
+{
+        return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
+}
+
 /* ----------------------------------------------------------------------- */
 
-static unsigned short normal_i2c[] = { 0x8a >> 1, I2C_CLIENT_END };
+static const struct v4l2_subdev_core_ops bt819_core_ops = {
+        .g_chip_ident = bt819_g_chip_ident,
+        .g_ctrl = bt819_g_ctrl,
+        .s_ctrl = bt819_s_ctrl,
+        .queryctrl = bt819_queryctrl,
+};
 
-I2C_CLIENT_INSMOD;
+static const struct v4l2_subdev_tuner_ops bt819_tuner_ops = {
+        .s_std = bt819_s_std,
+};
+
+static const struct v4l2_subdev_video_ops bt819_video_ops = {
+        .s_routing = bt819_s_routing,
+        .s_stream = bt819_s_stream,
+        .querystd = bt819_querystd,
+        .g_input_status = bt819_g_input_status,
+};
+
+static const struct v4l2_subdev_ops bt819_ops = {
+        .core = &bt819_core_ops,
+        .tuner = &bt819_tuner_ops,
+        .video = &bt819_video_ops,
+};
+
+/* ----------------------------------------------------------------------- */
 
 static int bt819_probe(struct i2c_client *client,
                         const struct i2c_device_id *id)
 {
         int i, ver;
         struct bt819 *decoder;
+        struct v4l2_subdev *sd;
         const char *name;
 
         /* Check if the adapter supports the needed features */
         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
                 return -ENODEV;
 
-        ver = bt819_read(client, 0x17);
+        decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
+        if (decoder == NULL)
+                return -ENOMEM;
+        sd = &decoder->sd;
+        v4l2_i2c_subdev_init(sd, client, &bt819_ops);
+
+        ver = bt819_read(decoder, 0x17);
         switch (ver & 0xf0) {
         case 0x70:
                 name = "bt819a";
+                decoder->ident = V4L2_IDENT_BT819A;
                 break;
         case 0x60:
                 name = "bt817a";
+                decoder->ident = V4L2_IDENT_BT817A;
                 break;
         case 0x20:
                 name = "bt815a";
+                decoder->ident = V4L2_IDENT_BT815A;
                 break;
         default:
-                v4l_dbg(1, debug, client,
+                v4l2_dbg(1, debug, sd,
                         "unknown chip version 0x%02x\n", ver);
                 return -ENODEV;
         }
@@ -472,28 +501,26 @@ static int bt819_probe(struct i2c_client *client,
         v4l_info(client, "%s found @ 0x%x (%s)\n", name,
                         client->addr << 1, client->adapter->name);
 
-        decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
-        if (decoder == NULL)
-                return -ENOMEM;
         decoder->norm = V4L2_STD_NTSC;
         decoder->input = 0;
         decoder->enable = 1;
         decoder->bright = 0;
         decoder->contrast = 0xd8;       /* 100% of original signal */
         decoder->hue = 0;
-        decoder->sat = 0xfe;    /* 100% of original signal */
-        decoder->initialized = 0;
-        i2c_set_clientdata(client, decoder);
+        decoder->sat = 0xfe;            /* 100% of original signal */
 
-        i = bt819_init(client);
+        i = bt819_init(sd);
         if (i < 0)
-                v4l_dbg(1, debug, client, "init status %d\n", i);
+                v4l2_dbg(1, debug, sd, "init status %d\n", i);
         return 0;
 }
 
 static int bt819_remove(struct i2c_client *client)
 {
-        kfree(i2c_get_clientdata(client));
+        struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+        v4l2_device_unregister_subdev(sd);
+        kfree(to_bt819(sd));
         return 0;
 }