V4L/DVB (9825): msp3400: convert to v4l2_subdev.

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

3 files changed, 247 insertions, 196 deletions

diff --git a/drivers/media/video/msp3400-driver.c b/drivers/media/video/msp3400-driver.c
index 3da74dcee902..79ae7bd23528 100644
--- a/drivers/media/video/msp3400-driver.c
+++ b/drivers/media/video/msp3400-driver.c
@@ -51,14 +51,14 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
 #include <linux/videodev2.h>
-#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
 #include <media/v4l2-ioctl.h>
 #include <media/v4l2-i2c-drv-legacy.h>
-#include <media/tvaudio.h>
 #include <media/msp3400.h>
-#include <linux/kthread.h>
-#include <linux/freezer.h>
+#include <media/tvaudio.h>
 #include "msp3400-driver.h"
 
 /* ---------------------------------------------------------------------- */
@@ -265,7 +265,7 @@ static char *scart_names[] = {
 
 void msp_set_scart(struct i2c_client *client, int in, int out)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
 
         state->in_scart = in;
 
@@ -289,7 +289,7 @@ void msp_set_scart(struct i2c_client *client, int in, int out)
 
 void msp_set_audio(struct i2c_client *client)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
         int bal = 0, bass, treble, loudness;
         int val = 0;
         int reallymuted = state->muted | state->scan_in_progress;
@@ -336,7 +336,7 @@ void msp_set_audio(struct i2c_client *client)
 
 static void msp_wake_thread(struct i2c_client *client)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
 
         if (NULL == state->kthread)
                 return;
@@ -390,9 +390,9 @@ static int msp_mode_v4l1_to_v4l2(int mode)
 }
 #endif
 
-static int msp_get_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
+static int msp_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(sd);
 
         switch (ctrl->id) {
         case V4L2_CID_AUDIO_VOLUME:
@@ -433,9 +433,10 @@ static int msp_get_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
         return 0;
 }
 
-static int msp_set_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
+static int msp_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
 
         switch (ctrl->id) {
         case V4L2_CID_AUDIO_VOLUME:
@@ -481,40 +482,16 @@ static int msp_set_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
         return 0;
 }
 
-static int msp_command(struct i2c_client *client, unsigned int cmd, void *arg)
+#ifdef CONFIG_VIDEO_ALLOW_V4L1
+static int msp_ioctl(struct v4l2_subdev *sd, int cmd, void *arg)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
-
-        if (msp_debug >= 2)
-                v4l_i2c_print_ioctl(client, cmd);
+        struct msp_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
 
         switch (cmd) {
-        case AUDC_SET_RADIO:
-                if (state->radio)
-                        return 0;
-                state->radio = 1;
-                v4l_dbg(1, msp_debug, client, "switching to radio mode\n");
-                state->watch_stereo = 0;
-                switch (state->opmode) {
-                case OPMODE_MANUAL:
-                        /* set msp3400 to FM radio mode */
-                        msp3400c_set_mode(client, MSP_MODE_FM_RADIO);
-                        msp3400c_set_carrier(client, MSP_CARRIER(10.7),
-                                            MSP_CARRIER(10.7));
-                        msp_set_audio(client);
-                        break;
-                case OPMODE_AUTODETECT:
-                case OPMODE_AUTOSELECT:
-                        /* the thread will do for us */
-                        msp_wake_thread(client);
-                        break;
-                }
-                break;
-
         /* --- v4l ioctls --- */
         /* take care: bttv does userspace copying, we'll get a
            kernel pointer here... */
-#ifdef CONFIG_VIDEO_ALLOW_V4L1
         case VIDIOCGAUDIO:
         {
                 struct video_audio *va = arg;
@@ -588,105 +565,137 @@ static int msp_command(struct i2c_client *client, unsigned int cmd, void *arg)
                 msp_wake_thread(client);
                 break;
         }
-#endif
-        case VIDIOC_S_FREQUENCY:
-        {
-                /* new channel -- kick audio carrier scan */
-                msp_wake_thread(client);
-                break;
+        default:
+                return -ENOIOCTLCMD;
         }
+        return 0;
+}
+#endif
 
-        /* --- v4l2 ioctls --- */
-        case VIDIOC_S_STD:
-        {
-                v4l2_std_id *id = arg;
-                int update = state->radio || state->v4l2_std != *id;
+/* --- v4l2 ioctls --- */
+static int msp_s_radio(struct v4l2_subdev *sd)
+{
+        struct msp_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
 
-                state->v4l2_std = *id;
-                state->radio = 0;
-                if (update)
-                        msp_wake_thread(client);
+        if (state->radio)
                 return 0;
+        state->radio = 1;
+        v4l_dbg(1, msp_debug, client, "switching to radio mode\n");
+        state->watch_stereo = 0;
+        switch (state->opmode) {
+        case OPMODE_MANUAL:
+                /* set msp3400 to FM radio mode */
+                msp3400c_set_mode(client, MSP_MODE_FM_RADIO);
+                msp3400c_set_carrier(client, MSP_CARRIER(10.7),
+                                MSP_CARRIER(10.7));
+                msp_set_audio(client);
+                break;
+        case OPMODE_AUTODETECT:
+        case OPMODE_AUTOSELECT:
+                /* the thread will do for us */
+                msp_wake_thread(client);
+                break;
         }
+        return 0;
+}
 
-        case VIDIOC_INT_G_AUDIO_ROUTING:
-        {
-                struct v4l2_routing *rt = arg;
+static int msp_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *freq)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
 
-                *rt = state->routing;
-                break;
-        }
+        /* new channel -- kick audio carrier scan */
+        msp_wake_thread(client);
+        return 0;
+}
 
-        case VIDIOC_INT_S_AUDIO_ROUTING:
-        {
-                struct v4l2_routing *rt = arg;
-                int tuner = (rt->input >> 3) & 1;
-                int sc_in = rt->input & 0x7;
-                int sc1_out = rt->output & 0xf;
-                int sc2_out = (rt->output >> 4) & 0xf;
-                u16 val, reg;
-                int i;
-                int extern_input = 1;
-
-                if (state->routing.input == rt->input &&
-                    state->routing.output == rt->output)
-                        break;
-                state->routing = *rt;
-                /* check if the tuner input is used */
-                for (i = 0; i < 5; i++) {
-                        if (((rt->input >> (4 + i * 4)) & 0xf) == 0)
-                                extern_input = 0;
-                }
-                state->mode = extern_input ? MSP_MODE_EXTERN : MSP_MODE_AM_DETECT;
-                state->rxsubchans = V4L2_TUNER_SUB_STEREO;
-                msp_set_scart(client, sc_in, 0);
-                msp_set_scart(client, sc1_out, 1);
-                msp_set_scart(client, sc2_out, 2);
-                msp_set_audmode(client);
-                reg = (state->opmode == OPMODE_AUTOSELECT) ? 0x30 : 0xbb;
-                val = msp_read_dem(client, reg);
-                msp_write_dem(client, reg, (val & ~0x100) | (tuner << 8));
-                /* wake thread when a new input is chosen */
+static int msp_s_std(struct v4l2_subdev *sd, v4l2_std_id id)
+{
+        struct msp_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        int update = state->radio || state->v4l2_std != id;
+
+        state->v4l2_std = id;
+        state->radio = 0;
+        if (update)
                 msp_wake_thread(client);
-                break;
+        return 0;
+}
+
+static int msp_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *rt)
+{
+        struct msp_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        int tuner = (rt->input >> 3) & 1;
+        int sc_in = rt->input & 0x7;
+        int sc1_out = rt->output & 0xf;
+        int sc2_out = (rt->output >> 4) & 0xf;
+        u16 val, reg;
+        int i;
+        int extern_input = 1;
+
+        if (state->routing.input == rt->input &&
+                        state->routing.output == rt->output)
+                return 0;
+        state->routing = *rt;
+        /* check if the tuner input is used */
+        for (i = 0; i < 5; i++) {
+                if (((rt->input >> (4 + i * 4)) & 0xf) == 0)
+                        extern_input = 0;
         }
+        state->mode = extern_input ? MSP_MODE_EXTERN : MSP_MODE_AM_DETECT;
+        state->rxsubchans = V4L2_TUNER_SUB_STEREO;
+        msp_set_scart(client, sc_in, 0);
+        msp_set_scart(client, sc1_out, 1);
+        msp_set_scart(client, sc2_out, 2);
+        msp_set_audmode(client);
+        reg = (state->opmode == OPMODE_AUTOSELECT) ? 0x30 : 0xbb;
+        val = msp_read_dem(client, reg);
+        msp_write_dem(client, reg, (val & ~0x100) | (tuner << 8));
+        /* wake thread when a new input is chosen */
+        msp_wake_thread(client);
+        return 0;
+}
 
-        case VIDIOC_G_TUNER:
-        {
-                struct v4l2_tuner *vt = arg;
+static int msp_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
+{
+        struct msp_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
 
-                if (state->radio)
-                        break;
-                if (state->opmode == OPMODE_AUTOSELECT)
-                        msp_detect_stereo(client);
-                vt->audmode    = state->audmode;
-                vt->rxsubchans = state->rxsubchans;
-                vt->capability |= V4L2_TUNER_CAP_STEREO |
-                        V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
-                break;
-        }
+        if (state->radio)
+                return 0;
+        if (state->opmode == OPMODE_AUTOSELECT)
+                msp_detect_stereo(client);
+        vt->audmode    = state->audmode;
+        vt->rxsubchans = state->rxsubchans;
+        vt->capability |= V4L2_TUNER_CAP_STEREO |
+                V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
+        return 0;
+}
 
-        case VIDIOC_S_TUNER:
-        {
-                struct v4l2_tuner *vt = (struct v4l2_tuner *)arg;
+static int msp_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
+{
+        struct msp_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
 
-                if (state->radio)  /* TODO: add mono/stereo support for radio */
-                        break;
-                if (state->audmode == vt->audmode)
-                        break;
-                state->audmode = vt->audmode;
-                /* only set audmode */
-                msp_set_audmode(client);
-                break;
-        }
+        if (state->radio)  /* TODO: add mono/stereo support for radio */
+                return 0;
+        if (state->audmode == vt->audmode)
+                return 0;
+        state->audmode = vt->audmode;
+        /* only set audmode */
+        msp_set_audmode(client);
+        return 0;
+}
 
-        case VIDIOC_INT_I2S_CLOCK_FREQ:
-        {
-                u32 *a = (u32 *)arg;
+static int msp_s_i2s_clock_freq(struct v4l2_subdev *sd, u32 freq)
+{
+        struct msp_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
 
-                v4l_dbg(1, msp_debug, client, "Setting I2S speed to %d\n", *a);
+        v4l_dbg(1, msp_debug, client, "Setting I2S speed to %d\n", freq);
 
-                switch (*a) {
+        switch (freq) {
                 case 1024000:
                         state->i2s_mode = 0;
                         break;
@@ -695,24 +704,24 @@ static int msp_command(struct i2c_client *client, unsigned int cmd, void *arg)
                         break;
                 default:
                         return -EINVAL;
-                }
-                break;
         }
+        return 0;
+}
 
-        case VIDIOC_QUERYCTRL:
-        {
-                struct v4l2_queryctrl *qc = arg;
+static int msp_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
+{
+        struct msp_state *state = to_state(sd);
 
-                switch (qc->id) {
+        switch (qc->id) {
                 case V4L2_CID_AUDIO_VOLUME:
                 case V4L2_CID_AUDIO_MUTE:
                         return v4l2_ctrl_query_fill_std(qc);
                 default:
                         break;
-                }
-                if (!state->has_sound_processing)
-                        return -EINVAL;
-                switch (qc->id) {
+        }
+        if (!state->has_sound_processing)
+                return -EINVAL;
+        switch (qc->id) {
                 case V4L2_CID_AUDIO_LOUDNESS:
                 case V4L2_CID_AUDIO_BALANCE:
                 case V4L2_CID_AUDIO_BASS:
@@ -720,32 +729,38 @@ static int msp_command(struct i2c_client *client, unsigned int cmd, void *arg)
                         return v4l2_ctrl_query_fill_std(qc);
                 default:
                         return -EINVAL;
-                }
         }
+        return 0;
+}
 
-        case VIDIOC_G_CTRL:
-                return msp_get_ctrl(client, arg);
-
-        case VIDIOC_S_CTRL:
-                return msp_set_ctrl(client, arg);
+static int msp_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_chip_ident *chip)
+{
+        struct msp_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
 
-        case VIDIOC_LOG_STATUS:
-        {
-                const char *p;
+        return v4l2_chip_ident_i2c_client(client, chip, state->ident,
+                        (state->rev1 << 16) | state->rev2);
+}
 
-                if (state->opmode == OPMODE_AUTOSELECT)
-                        msp_detect_stereo(client);
-                v4l_info(client, "%s rev1 = 0x%04x rev2 = 0x%04x\n",
-                                client->name, state->rev1, state->rev2);
-                v4l_info(client, "Audio:    volume %d%s\n",
-                                state->volume, state->muted ? " (muted)" : "");
-                if (state->has_sound_processing) {
-                        v4l_info(client, "Audio:    balance %d bass %d treble %d loudness %s\n",
-                                        state->balance, state->bass,
-                                        state->treble,
-                                        state->loudness ? "on" : "off");
-                }
-                switch (state->mode) {
+static int msp_log_status(struct v4l2_subdev *sd)
+{
+        struct msp_state *state = to_state(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        const char *p;
+
+        if (state->opmode == OPMODE_AUTOSELECT)
+                msp_detect_stereo(client);
+        v4l_info(client, "%s rev1 = 0x%04x rev2 = 0x%04x\n",
+                        client->name, state->rev1, state->rev2);
+        v4l_info(client, "Audio:    volume %d%s\n",
+                        state->volume, state->muted ? " (muted)" : "");
+        if (state->has_sound_processing) {
+                v4l_info(client, "Audio:    balance %d bass %d treble %d loudness %s\n",
+                                state->balance, state->bass,
+                                state->treble,
+                                state->loudness ? "on" : "off");
+        }
+        switch (state->mode) {
                 case MSP_MODE_AM_DETECT: p = "AM (for carrier detect)"; break;
                 case MSP_MODE_FM_RADIO: p = "FM Radio"; break;
                 case MSP_MODE_FM_TERRA: p = "Terrestial FM-mono/stereo"; break;
@@ -756,36 +771,25 @@ static int msp_command(struct i2c_client *client, unsigned int cmd, void *arg)
                 case MSP_MODE_BTSC: p = "BTSC"; break;
                 case MSP_MODE_EXTERN: p = "External input"; break;
                 default: p = "unknown"; break;
-                }
-                if (state->mode == MSP_MODE_EXTERN) {
-                        v4l_info(client, "Mode:     %s\n", p);
-                } else if (state->opmode == OPMODE_MANUAL) {
-                        v4l_info(client, "Mode:     %s (%s%s)\n", p,
+        }
+        if (state->mode == MSP_MODE_EXTERN) {
+                v4l_info(client, "Mode:     %s\n", p);
+        } else if (state->opmode == OPMODE_MANUAL) {
+                v4l_info(client, "Mode:     %s (%s%s)\n", p,
                                 (state->rxsubchans & V4L2_TUNER_SUB_STEREO) ? "stereo" : "mono",
                                 (state->rxsubchans & V4L2_TUNER_SUB_LANG2) ? ", dual" : "");
-                } else {
-                        if (state->opmode == OPMODE_AUTODETECT)
-                                v4l_info(client, "Mode:     %s\n", p);
-                        v4l_info(client, "Standard: %s (%s%s)\n",
+        } else {
+                if (state->opmode == OPMODE_AUTODETECT)
+                        v4l_info(client, "Mode:     %s\n", p);
+                v4l_info(client, "Standard: %s (%s%s)\n",
                                 msp_standard_std_name(state->std),
                                 (state->rxsubchans & V4L2_TUNER_SUB_STEREO) ? "stereo" : "mono",
                                 (state->rxsubchans & V4L2_TUNER_SUB_LANG2) ? ", dual" : "");
-                }
-                v4l_info(client, "Audmode:  0x%04x\n", state->audmode);
-                v4l_info(client, "Routing:  0x%08x (input) 0x%08x (output)\n",
-                                state->routing.input, state->routing.output);
-                v4l_info(client, "ACB:      0x%04x\n", state->acb);
-                break;
-        }
-
-        case VIDIOC_G_CHIP_IDENT:
-                return v4l2_chip_ident_i2c_client(client, arg, state->ident,
-                                (state->rev1 << 16) | state->rev2);
-
-        default:
-                /* unknown */
-                return -EINVAL;
         }
+        v4l_info(client, "Audmode:  0x%04x\n", state->audmode);
+        v4l_info(client, "Routing:  0x%08x (input) 0x%08x (output)\n",
+                        state->routing.input, state->routing.output);
+        v4l_info(client, "ACB:      0x%04x\n", state->acb);
         return 0;
 }
 
@@ -803,11 +807,49 @@ static int msp_resume(struct i2c_client *client)
         return 0;
 }
 
+static int msp_command(struct i2c_client *client, unsigned cmd, void *arg)
+{
+        return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_subdev_core_ops msp_core_ops = {
+        .log_status = msp_log_status,
+        .g_chip_ident = msp_g_chip_ident,
+        .g_ctrl = msp_g_ctrl,
+        .s_ctrl = msp_s_ctrl,
+        .queryctrl = msp_queryctrl,
+#ifdef CONFIG_VIDEO_ALLOW_V4L1
+        .ioctl = msp_ioctl,
+#endif
+};
+
+static const struct v4l2_subdev_tuner_ops msp_tuner_ops = {
+        .s_frequency = msp_s_frequency,
+        .g_tuner = msp_g_tuner,
+        .s_tuner = msp_s_tuner,
+        .s_radio = msp_s_radio,
+        .s_std = msp_s_std,
+};
+
+static const struct v4l2_subdev_audio_ops msp_audio_ops = {
+        .s_routing = msp_s_routing,
+        .s_i2s_clock_freq = msp_s_i2s_clock_freq,
+};
+
+static const struct v4l2_subdev_ops msp_ops = {
+        .core = &msp_core_ops,
+        .tuner = &msp_tuner_ops,
+        .audio = &msp_audio_ops,
+};
+
 /* ----------------------------------------------------------------------- */
 
 static int msp_probe(struct i2c_client *client, const struct i2c_device_id *id)
 {
         struct msp_state *state;
+        struct v4l2_subdev *sd;
         int (*thread_func)(void *data) = NULL;
         int msp_hard;
         int msp_family;
@@ -827,7 +869,8 @@ static int msp_probe(struct i2c_client *client, const struct i2c_device_id *id)
         if (!state)
                 return -ENOMEM;
 
-        i2c_set_clientdata(client, state);
+        sd = &state->sd;
+        v4l2_i2c_subdev_init(sd, client, &msp_ops);
 
         state->v4l2_std = V4L2_STD_NTSC;
         state->audmode = V4L2_TUNER_MODE_STEREO;
@@ -972,8 +1015,9 @@ static int msp_probe(struct i2c_client *client, const struct i2c_device_id *id)
 
 static int msp_remove(struct i2c_client *client)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
 
+        v4l2_device_unregister_subdev(&state->sd);
         /* shutdown control thread */
         if (state->kthread) {
                 state->restart = 1;
diff --git a/drivers/media/video/msp3400-driver.h b/drivers/media/video/msp3400-driver.h
index ab69a290e5dc..3fe1c1b10f53 100644
--- a/drivers/media/video/msp3400-driver.h
+++ b/drivers/media/video/msp3400-driver.h
@@ -5,6 +5,7 @@
 #define MSP3400_DRIVER_H
 
 #include <media/msp3400.h>
+#include <media/v4l2-device.h>
 
 /* ---------------------------------------------------------------------- */
 
@@ -49,6 +50,7 @@ extern int msp_dolby;
 extern int msp_stereo_thresh;
 
 struct msp_state {
+        struct v4l2_subdev sd;
         int rev1, rev2;
         int ident;
         u8 has_nicam;
@@ -96,6 +98,11 @@ struct msp_state {
         unsigned int         watch_stereo:1;
 };
 
+static inline struct msp_state *to_state(struct v4l2_subdev *sd)
+{
+        return container_of(sd, struct msp_state, sd);
+}
+
 /* msp3400-driver.c */
 int msp_write_dem(struct i2c_client *client, int addr, int val);
 int msp_write_dsp(struct i2c_client *client, int addr, int val);
diff --git a/drivers/media/video/msp3400-kthreads.c b/drivers/media/video/msp3400-kthreads.c
index 846a14a61fd1..a655e9c30146 100644
--- a/drivers/media/video/msp3400-kthreads.c
+++ b/drivers/media/video/msp3400-kthreads.c
@@ -159,7 +159,7 @@ const char *msp_standard_std_name(int std)
 
 static void msp_set_source(struct i2c_client *client, u16 src)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
 
         if (msp_dolby) {
                 msp_write_dsp(client, 0x0008, 0x0520); /* I2S1 */
@@ -186,7 +186,7 @@ void msp3400c_set_carrier(struct i2c_client *client, int cdo1, int cdo2)
 
 void msp3400c_set_mode(struct i2c_client *client, int mode)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
         struct msp3400c_init_data_dem *data = &msp3400c_init_data[mode];
         int tuner = (state->routing.input >> 3) & 1;
         int i;
@@ -227,7 +227,7 @@ static void msp3400c_set_audmode(struct i2c_client *client)
         static char *strmode[] = {
                 "mono", "stereo", "lang2", "lang1", "lang1+lang2"
         };
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
         char *modestr = (state->audmode >= 0 && state->audmode < 5) ?
                 strmode[state->audmode] : "unknown";
         int src = 0;    /* channel source: FM/AM, nicam or SCART */
@@ -356,7 +356,7 @@ static void msp3400c_set_audmode(struct i2c_client *client)
 
 static void msp3400c_print_mode(struct i2c_client *client)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
 
         if (state->main == state->second)
                 v4l_dbg(1, msp_debug, client,
@@ -385,7 +385,7 @@ static void msp3400c_print_mode(struct i2c_client *client)
 
 static int msp3400c_detect_stereo(struct i2c_client *client)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
         int val;
         int rxsubchans = state->rxsubchans;
         int newnicam = state->nicam_on;
@@ -463,7 +463,7 @@ static int msp3400c_detect_stereo(struct i2c_client *client)
 /* stereo/multilang monitoring */
 static void watch_stereo(struct i2c_client *client)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
 
         if (msp_detect_stereo(client))
                 msp_set_audmode(client);
@@ -475,7 +475,7 @@ static void watch_stereo(struct i2c_client *client)
 int msp3400c_thread(void *data)
 {
         struct i2c_client *client = data;
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
         struct msp3400c_carrier_detect *cd;
         int count, max1, max2, val1, val2, val, i;
 
@@ -659,7 +659,7 @@ no_second:
 int msp3410d_thread(void *data)
 {
         struct i2c_client *client = data;
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
         int val, i, std, count;
 
         v4l_dbg(1, msp_debug, client, "msp3410 daemon started\n");
@@ -825,7 +825,7 @@ restart:
 
 static int msp34xxg_modus(struct i2c_client *client)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
 
         if (state->radio) {
                 v4l_dbg(1, msp_debug, client, "selected radio modus\n");
@@ -852,7 +852,7 @@ static int msp34xxg_modus(struct i2c_client *client)
 
 static void msp34xxg_set_source(struct i2c_client *client, u16 reg, int in)
  {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
         int source, matrix;
 
         switch (state->audmode) {
@@ -895,7 +895,7 @@ static void msp34xxg_set_source(struct i2c_client *client, u16 reg, int in)
 
 static void msp34xxg_set_sources(struct i2c_client *client)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
         u32 in = state->routing.input;
 
         msp34xxg_set_source(client, 0x0008, (in >> 4) & 0xf);
@@ -911,7 +911,7 @@ static void msp34xxg_set_sources(struct i2c_client *client)
 /* (re-)initialize the msp34xxg */
 static void msp34xxg_reset(struct i2c_client *client)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
         int tuner = (state->routing.input >> 3) & 1;
         int modus;
 
@@ -954,7 +954,7 @@ static void msp34xxg_reset(struct i2c_client *client)
 int msp34xxg_thread(void *data)
 {
         struct i2c_client *client = data;
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
         int val, i;
 
         v4l_dbg(1, msp_debug, client, "msp34xxg daemon started\n");
@@ -1049,7 +1049,7 @@ unmute:
 
 static int msp34xxg_detect_stereo(struct i2c_client *client)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
         int status = msp_read_dem(client, 0x0200);
         int is_bilingual = status & 0x100;
         int is_stereo = status & 0x40;
@@ -1078,7 +1078,7 @@ static int msp34xxg_detect_stereo(struct i2c_client *client)
 
 static void msp34xxg_set_audmode(struct i2c_client *client)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
 
         if (state->std == 0x20) {
                if ((state->rxsubchans & V4L2_TUNER_SUB_SAP) &&
@@ -1095,7 +1095,7 @@ static void msp34xxg_set_audmode(struct i2c_client *client)
 
 void msp_set_audmode(struct i2c_client *client)
 {
-        struct msp_state *state = i2c_get_clientdata(client);
+        struct msp_state *state = to_state(i2c_get_clientdata(client));
 
         switch (state->opmode) {
         case OPMODE_MANUAL:
@@ -1110,7 +1110,7 @@ void msp_set_audmode(struct i2c_client *client)
 
 int msp_detect_stereo(struct i2c_client *client)
 {
-        struct msp_state *state  = i2c_get_clientdata(client);
+        struct msp_state *state  = to_state(i2c_get_clientdata(client));
 
         switch (state->opmode) {
         case OPMODE_MANUAL: