[media] msi3101: use msi001 tuner driver

Remove MSi001 RF tuner related code as MSi001 functionality is moved
to own driver.

Implement SPI master adapter.

Attach MSi001 driver via SPI / V4L subdev framework.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

2 files changed, 136 insertions, 350 deletions

diff --git a/drivers/staging/media/msi3101/Kconfig b/drivers/staging/media/msi3101/Kconfig
index 97d5210d19c1..de0b3bba3873 100644
--- a/drivers/staging/media/msi3101/Kconfig
+++ b/drivers/staging/media/msi3101/Kconfig
@@ -1,8 +1,9 @@
 config USB_MSI3101
         tristate "Mirics MSi3101 SDR Dongle"
-        depends on USB && VIDEO_DEV && VIDEO_V4L2
+        depends on USB && VIDEO_DEV && VIDEO_V4L2 && SPI
         select VIDEOBUF2_CORE
         select VIDEOBUF2_VMALLOC
+        select MEDIA_TUNER_MSI001
 
 config MEDIA_TUNER_MSI001
         tristate "Mirics MSi001"
diff --git a/drivers/staging/media/msi3101/sdr-msi3101.c b/drivers/staging/media/msi3101/sdr-msi3101.c
index cf71e7e6c317..2135940f2d58 100644
--- a/drivers/staging/media/msi3101/sdr-msi3101.c
+++ b/drivers/staging/media/msi3101/sdr-msi3101.c
@@ -25,7 +25,6 @@
 
 #include <linux/module.h>
 #include <linux/slab.h>
-#include <linux/gcd.h>
 #include <asm/div64.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-ioctl.h>
@@ -33,6 +32,7 @@
 #include <media/v4l2-event.h>
 #include <linux/usb.h>
 #include <media/videobuf2-vmalloc.h>
+#include <linux/spi/spi.h>
 
 /*
  *   iConfiguration          0
@@ -57,7 +57,7 @@
 #define V4L2_PIX_FMT_SDR_S14    v4l2_fourcc('D', 'S', '1', '4') /* signed 14-bit */
 #define V4L2_PIX_FMT_SDR_MSI2500_384 v4l2_fourcc('M', '3', '8', '4') /* Mirics MSi2500 format 384 */
 
-static const struct v4l2_frequency_band bands_adc[] = {
+static const struct v4l2_frequency_band bands[] = {
         {
                 .tuner = 0,
                 .type = V4L2_TUNER_ADC,
@@ -68,24 +68,6 @@ static const struct v4l2_frequency_band bands_adc[] = {
         },
 };
 
-static const struct v4l2_frequency_band bands_rf[] = {
-        {
-                .tuner = 1,
-                .type = V4L2_TUNER_RF,
-                .index = 0,
-                .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
-                .rangelow   =   49000000,
-                .rangehigh  =  263000000,
-        }, {
-                .tuner = 1,
-                .type = V4L2_TUNER_RF,
-                .index = 1,
-                .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
-                .rangelow   =  390000000,
-                .rangehigh  =  960000000,
-        },
-};
-
 /* stream formats */
 struct msi3101_format {
         char    *name;
@@ -128,6 +110,8 @@ struct msi3101_frame_buf {
 struct msi3101_state {
         struct video_device vdev;
         struct v4l2_device v4l2_dev;
+        struct v4l2_subdev *v4l2_subdev;
+        struct spi_master *master;
 
         /* videobuf2 queue and queued buffers list */
         struct vb2_queue vb_queue;
@@ -141,7 +125,7 @@ struct msi3101_state {
         /* Pointer to our usb_device, will be NULL after unplug */
         struct usb_device *udev; /* Both mutexes most be hold when setting! */
 
-        unsigned int f_adc, f_tuner;
+        unsigned int f_adc;
         u32 pixelformat;
 
         unsigned int isoc_errors; /* number of contiguous ISOC errors */
@@ -153,14 +137,6 @@ struct msi3101_state {
 
         /* Controls */
         struct v4l2_ctrl_handler hdl;
-        struct v4l2_ctrl *bandwidth_auto;
-        struct v4l2_ctrl *bandwidth;
-        struct v4l2_ctrl *lna_gain_auto;
-        struct v4l2_ctrl *lna_gain;
-        struct v4l2_ctrl *mixer_gain_auto;
-        struct v4l2_ctrl *mixer_gain;
-        struct v4l2_ctrl *if_gain_auto;
-        struct v4l2_ctrl *if_gain;
 
         u32 next_sample; /* for track lost packets */
         u32 sample; /* for sample rate calc */
@@ -822,9 +798,9 @@ static void msi3101_disconnect(struct usb_interface *intf)
         mutex_lock(&s->v4l2_lock);
         /* No need to keep the urbs around after disconnection */
         s->udev = NULL;
-
         v4l2_device_disconnect(&s->v4l2_dev);
         video_unregister_device(&s->vdev);
+        spi_unregister_master(s->master);
         mutex_unlock(&s->v4l2_lock);
         mutex_unlock(&s->vb_queue_lock);
 
@@ -924,20 +900,25 @@ static int msi3101_ctrl_msg(struct msi3101_state *s, u8 cmd, u32 data)
         return ret;
 };
 
-static int msi3101_tuner_write(struct msi3101_state *s, u32 data)
-{
-        return msi3101_ctrl_msg(s, CMD_WREG, data << 8 | 0x09);
-};
-
 #define F_REF 24000000
 #define DIV_R_IN 2
 static int msi3101_set_usb_adc(struct msi3101_state *s)
 {
         int ret, div_n, div_m, div_r_out, f_sr, f_vco, fract;
         u32 reg3, reg4, reg7;
+        struct v4l2_ctrl *bandwidth_auto;
+        struct v4l2_ctrl *bandwidth;
 
         f_sr = s->f_adc;
 
+        /* set tuner, subdev, filters according to sampling rate */
+        bandwidth_auto = v4l2_ctrl_find(&s->hdl, V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
+        bandwidth = v4l2_ctrl_find(&s->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
+        if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
+                bandwidth = v4l2_ctrl_find(&s->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
+                v4l2_ctrl_s_ctrl(bandwidth, s->f_adc);
+        }
+
         /* select stream format */
         switch (s->pixelformat) {
         case V4L2_SDR_FMT_CU8:
@@ -1066,222 +1047,6 @@ err:
         return ret;
 };
 
-static int msi3101_set_gain(struct msi3101_state *s)
-{
-        int ret;
-        u32 reg;
-        dev_dbg(&s->udev->dev, "%s: lna=%d mixer=%d if=%d\n", __func__,
-                        s->lna_gain->val, s->mixer_gain->val, s->if_gain->val);
-
-        reg = 1 << 0;
-        reg |= (59 - s->if_gain->val) << 4;
-        reg |= 0 << 10;
-        reg |= (1 - s->mixer_gain->val) << 12;
-        reg |= (1 - s->lna_gain->val) << 13;
-        reg |= 4 << 14;
-        reg |= 0 << 17;
-        ret = msi3101_tuner_write(s, reg);
-        if (ret)
-                goto err;
-
-        return 0;
-err:
-        dev_dbg(&s->udev->dev, "%s: failed %d\n", __func__, ret);
-        return ret;
-};
-
-static int msi3101_set_tuner(struct msi3101_state *s)
-{
-        int ret, i;
-        unsigned int n, m, thresh, frac, vco_step, tmp, f_if1;
-        u32 reg;
-        u64 f_vco, tmp64;
-        u8 mode, filter_mode, lo_div;
-        static const struct {
-                u32 rf;
-                u8 mode;
-                u8 lo_div;
-        } band_lut[] = {
-                { 50000000, 0xe1, 16}, /* AM_MODE2, antenna 2 */
-                {108000000, 0x42, 32}, /* VHF_MODE */
-                {330000000, 0x44, 16}, /* B3_MODE */
-                {960000000, 0x48,  4}, /* B45_MODE */
-                {      ~0U, 0x50,  2}, /* BL_MODE */
-        };
-        static const struct {
-                u32 freq;
-                u8 filter_mode;
-        } if_freq_lut[] = {
-                {      0, 0x03}, /* Zero IF */
-                { 450000, 0x02}, /* 450 kHz IF */
-                {1620000, 0x01}, /* 1.62 MHz IF */
-                {2048000, 0x00}, /* 2.048 MHz IF */
-        };
-        static const struct {
-                u32 freq;
-                u8 val;
-        } bandwidth_lut[] = {
-                { 200000, 0x00}, /* 200 kHz */
-                { 300000, 0x01}, /* 300 kHz */
-                { 600000, 0x02}, /* 600 kHz */
-                {1536000, 0x03}, /* 1.536 MHz */
-                {5000000, 0x04}, /* 5 MHz */
-                {6000000, 0x05}, /* 6 MHz */
-                {7000000, 0x06}, /* 7 MHz */
-                {8000000, 0x07}, /* 8 MHz */
-        };
-
-        unsigned int f_rf = s->f_tuner;
-
-        /*
-         * bandwidth (Hz)
-         * 200000, 300000, 600000, 1536000, 5000000, 6000000, 7000000, 8000000
-         */
-        unsigned int bandwidth;
-
-        /*
-         * intermediate frequency (Hz)
-         * 0, 450000, 1620000, 2048000
-         */
-        unsigned int f_if = 0;
-
-        dev_dbg(&s->udev->dev,
-                        "%s: f_rf=%d f_if=%d\n",
-                        __func__, f_rf, f_if);
-
-        ret = -EINVAL;
-
-        for (i = 0; i < ARRAY_SIZE(band_lut); i++) {
-                if (f_rf <= band_lut[i].rf) {
-                        mode = band_lut[i].mode;
-                        lo_div = band_lut[i].lo_div;
-                        break;
-                }
-        }
-
-        if (i == ARRAY_SIZE(band_lut))
-                goto err;
-
-        /* AM_MODE is upconverted */
-        if ((mode >> 0) & 0x1)
-                f_if1 =  5 * F_REF;
-        else
-                f_if1 =  0;
-
-        for (i = 0; i < ARRAY_SIZE(if_freq_lut); i++) {
-                if (f_if == if_freq_lut[i].freq) {
-                        filter_mode = if_freq_lut[i].filter_mode;
-                        break;
-                }
-        }
-
-        if (i == ARRAY_SIZE(if_freq_lut))
-                goto err;
-
-        /* filters */
-        if (s->bandwidth_auto->val)
-                bandwidth = s->f_adc;
-        else
-                bandwidth = s->bandwidth->val;
-
-        bandwidth = clamp(bandwidth, 200000U, 8000000U);
-
-        for (i = 0; i < ARRAY_SIZE(bandwidth_lut); i++) {
-                if (bandwidth <= bandwidth_lut[i].freq) {
-                        bandwidth = bandwidth_lut[i].val;
-                        break;
-                }
-        }
-
-        if (i == ARRAY_SIZE(bandwidth_lut))
-                goto err;
-
-        s->bandwidth->val = bandwidth_lut[i].freq;
-
-        dev_dbg(&s->udev->dev, "%s: bandwidth selected=%d\n",
-                        __func__, bandwidth_lut[i].freq);
-
-#define F_OUT_STEP 1
-#define R_REF 4
-        f_vco = (f_rf + f_if + f_if1) * lo_div;
-
-        tmp64 = f_vco;
-        m = do_div(tmp64, F_REF * R_REF);
-        n = (unsigned int) tmp64;
-
-        vco_step = F_OUT_STEP * lo_div;
-        thresh = (F_REF * R_REF) / vco_step;
-        frac = 1ul * thresh * m / (F_REF * R_REF);
-
-        /* Find out greatest common divisor and divide to smaller. */
-        tmp = gcd(thresh, frac);
-        thresh /= tmp;
-        frac /= tmp;
-
-        /* Force divide to reg max. Resolution will be reduced. */
-        tmp = DIV_ROUND_UP(thresh, 4095);
-        thresh = DIV_ROUND_CLOSEST(thresh, tmp);
-        frac = DIV_ROUND_CLOSEST(frac, tmp);
-
-        /* calc real RF set */
-        tmp = 1ul * F_REF * R_REF * n;
-        tmp += 1ul * F_REF * R_REF * frac / thresh;
-        tmp /= lo_div;
-
-        dev_dbg(&s->udev->dev,
-                        "%s: rf=%u:%u n=%d thresh=%d frac=%d\n",
-                                __func__, f_rf, tmp, n, thresh, frac);
-
-        ret = msi3101_tuner_write(s, 0x00000e);
-        if (ret)
-                goto err;
-
-        ret = msi3101_tuner_write(s, 0x000003);
-        if (ret)
-                goto err;
-
-        reg = 0 << 0;
-        reg |= mode << 4;
-        reg |= filter_mode << 12;
-        reg |= bandwidth << 14;
-        reg |= 0x02 << 17;
-        reg |= 0x00 << 20;
-        ret = msi3101_tuner_write(s, reg);
-        if (ret)
-                goto err;
-
-        reg = 5 << 0;
-        reg |= thresh << 4;
-        reg |= 1 << 19;
-        reg |= 1 << 21;
-        ret = msi3101_tuner_write(s, reg);
-        if (ret)
-                goto err;
-
-        reg = 2 << 0;
-        reg |= frac << 4;
-        reg |= n << 16;
-        ret = msi3101_tuner_write(s, reg);
-        if (ret)
-                goto err;
-
-        ret = msi3101_set_gain(s);
-        if (ret)
-                goto err;
-
-        reg = 6 << 0;
-        reg |= 63 << 4;
-        reg |= 4095 << 10;
-        ret = msi3101_tuner_write(s, reg);
-        if (ret)
-                goto err;
-
-        return 0;
-err:
-        dev_dbg(&s->udev->dev, "%s: failed %d\n", __func__, ret);
-        return ret;
-};
-
 static int msi3101_start_streaming(struct vb2_queue *vq, unsigned int count)
 {
         struct msi3101_state *s = vb2_get_drv_priv(vq);
@@ -1294,6 +1059,9 @@ static int msi3101_start_streaming(struct vb2_queue *vq, unsigned int count)
         if (mutex_lock_interruptible(&s->v4l2_lock))
                 return -ERESTARTSYS;
 
+        /* wake-up tuner */
+        v4l2_subdev_call(s->v4l2_subdev, core, s_power, 1);
+
         ret = msi3101_set_usb_adc(s);
 
         ret = msi3101_isoc_init(s);
@@ -1328,7 +1096,7 @@ static int msi3101_stop_streaming(struct vb2_queue *vq)
         msi3101_ctrl_msg(s, CMD_WREG, 0x01000003);
 
         /* sleep tuner */
-        msi3101_tuner_write(s, 0x000000);
+        v4l2_subdev_call(s->v4l2_subdev, core, s_power, 0);
 
         mutex_unlock(&s->v4l2_lock);
 
@@ -1418,33 +1186,39 @@ static int msi3101_s_tuner(struct file *file, void *priv,
                 const struct v4l2_tuner *v)
 {
         struct msi3101_state *s = video_drvdata(file);
-        dev_dbg(&s->udev->dev, "%s:\n", __func__);
+        int ret;
+        dev_dbg(&s->udev->dev, "%s: index=%d\n", __func__, v->index);
 
-        return 0;
+        if (v->index == 0)
+                ret = 0;
+        else if (v->index == 1)
+                ret = v4l2_subdev_call(s->v4l2_subdev, tuner, s_tuner, v);
+        else
+                ret = -EINVAL;
+
+        return ret;
 }
 
 static int msi3101_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
 {
         struct msi3101_state *s = video_drvdata(file);
-        dev_dbg(&s->udev->dev, "%s:\n", __func__);
+        int ret;
+        dev_dbg(&s->udev->dev, "%s: index=%d\n", __func__, v->index);
 
         if (v->index == 0) {
-                strlcpy(v->name, "ADC: Mirics MSi2500", sizeof(v->name));
+                strlcpy(v->name, "Mirics MSi2500", sizeof(v->name));
                 v->type = V4L2_TUNER_ADC;
                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
                 v->rangelow =   1200000;
                 v->rangehigh = 15000000;
+                ret = 0;
         } else if (v->index == 1) {
-                strlcpy(v->name, "RF: Mirics MSi001", sizeof(v->name));
-                v->type = V4L2_TUNER_RF;
-                v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
-                v->rangelow =    49000000;
-                v->rangehigh =  960000000;
+                ret = v4l2_subdev_call(s->v4l2_subdev, tuner, g_tuner, v);
         } else {
-                return -EINVAL;
+                ret = -EINVAL;
         }
 
-        return 0;
+        return ret;
 }
 
 static int msi3101_g_frequency(struct file *file, void *priv,
@@ -1455,12 +1229,14 @@ static int msi3101_g_frequency(struct file *file, void *priv,
         dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d\n",
                         __func__, f->tuner, f->type);
 
-        if (f->tuner == 0)
+        if (f->tuner == 0) {
                 f->frequency = s->f_adc;
-        else if (f->tuner == 1)
-                f->frequency = s->f_tuner;
-        else
-                return -EINVAL;
+                ret = 0;
+        } else if (f->tuner == 1) {
+                ret = v4l2_subdev_call(s->v4l2_subdev, tuner, g_frequency, f);
+        } else {
+                ret = -EINVAL;
+        }
 
         return ret;
 }
@@ -1469,31 +1245,21 @@ static int msi3101_s_frequency(struct file *file, void *priv,
                 const struct v4l2_frequency *f)
 {
         struct msi3101_state *s = video_drvdata(file);
-        int ret, band;
+        int ret;
         dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d frequency=%u\n",
                         __func__, f->tuner, f->type, f->frequency);
 
         if (f->tuner == 0) {
                 s->f_adc = clamp_t(unsigned int, f->frequency,
-                                bands_adc[0].rangelow,
-                                bands_adc[0].rangehigh);
+                                bands[0].rangelow,
+                                bands[0].rangehigh);
                 dev_dbg(&s->udev->dev, "%s: ADC frequency=%u Hz\n",
                                 __func__, s->f_adc);
                 ret = msi3101_set_usb_adc(s);
         } else if (f->tuner == 1) {
-                #define BAND_RF_0 ((bands_rf[0].rangehigh + bands_rf[1].rangelow) / 2)
-                if (f->frequency < BAND_RF_0)
-                        band = 0;
-                else
-                        band = 1;
-                s->f_tuner = clamp_t(unsigned int, f->frequency,
-                                bands_rf[band].rangelow,
-                                bands_rf[band].rangehigh);
-                dev_dbg(&s->udev->dev, "%s: RF frequency=%u Hz\n",
-                                __func__, f->frequency);
-                ret = msi3101_set_tuner(s);
+                ret = v4l2_subdev_call(s->v4l2_subdev, tuner, s_frequency, f);
         } else {
-                return -EINVAL;
+                ret = -EINVAL;
         }
 
         return ret;
@@ -1503,24 +1269,25 @@ static int msi3101_enum_freq_bands(struct file *file, void *priv,
                 struct v4l2_frequency_band *band)
 {
         struct msi3101_state *s = video_drvdata(file);
+        int ret;
         dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d index=%d\n",
                         __func__, band->tuner, band->type, band->index);
 
         if (band->tuner == 0) {
-                if (band->index >= ARRAY_SIZE(bands_adc))
-                        return -EINVAL;
-
-                *band = bands_adc[band->index];
+                if (band->index >= ARRAY_SIZE(bands)) {
+                        ret = -EINVAL;
+                } else {
+                        *band = bands[band->index];
+                        ret = 0;
+                }
         } else if (band->tuner == 1) {
-                if (band->index >= ARRAY_SIZE(bands_rf))
-                        return -EINVAL;
-
-                *band = bands_rf[band->index];
+                ret = v4l2_subdev_call(s->v4l2_subdev, tuner,
+                                enum_freq_bands, band);
         } else {
-                return -EINVAL;
+                ret = -EINVAL;
         }
 
-        return 0;
+        return ret;
 }
 
 static const struct v4l2_ioctl_ops msi3101_ioctl_ops = {
@@ -1570,39 +1337,6 @@ static struct video_device msi3101_template = {
         .ioctl_ops                = &msi3101_ioctl_ops,
 };
 
-static int msi3101_s_ctrl(struct v4l2_ctrl *ctrl)
-{
-        struct msi3101_state *s =
-                        container_of(ctrl->handler, struct msi3101_state,
-                                        hdl);
-        int ret;
-        dev_dbg(&s->udev->dev,
-                        "%s: id=%d name=%s val=%d min=%d max=%d step=%d\n",
-                        __func__, ctrl->id, ctrl->name, ctrl->val,
-                        ctrl->minimum, ctrl->maximum, ctrl->step);
-
-        switch (ctrl->id) {
-        case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
-        case V4L2_CID_RF_TUNER_BANDWIDTH:
-                ret = msi3101_set_tuner(s);
-                break;
-        case  V4L2_CID_RF_TUNER_LNA_GAIN:
-        case  V4L2_CID_RF_TUNER_MIXER_GAIN:
-        case  V4L2_CID_RF_TUNER_IF_GAIN:
-                ret = msi3101_set_gain(s);
-                break;
-        default:
-                dev_dbg(&s->udev->dev, "%s: EINVAL\n", __func__);
-                ret = -EINVAL;
-        }
-
-        return ret;
-}
-
-static const struct v4l2_ctrl_ops msi3101_ctrl_ops = {
-        .s_ctrl = msi3101_s_ctrl,
-};
-
 static void msi3101_video_release(struct v4l2_device *v)
 {
         struct msi3101_state *s =
@@ -1613,13 +1347,43 @@ static void msi3101_video_release(struct v4l2_device *v)
         kfree(s);
 }
 
+static int msi3101_transfer_one_message(struct spi_master *master,
+                struct spi_message *m)
+{
+        struct msi3101_state *s = spi_master_get_devdata(master);
+        struct spi_transfer *t;
+        int ret = 0;
+        u32 data;
+
+        list_for_each_entry(t, &m->transfers, transfer_list) {
+                dev_dbg(&s->udev->dev, "%s: msg=%*ph\n",
+                                __func__, t->len, t->tx_buf);
+                data = 0x09; /* reg 9 is SPI adapter */
+                data |= ((u8 *)t->tx_buf)[0] << 8;
+                data |= ((u8 *)t->tx_buf)[1] << 16;
+                data |= ((u8 *)t->tx_buf)[2] << 24;
+                ret = msi3101_ctrl_msg(s, CMD_WREG, data);
+        }
+
+        m->status = ret;
+        spi_finalize_current_message(master);
+        return ret;
+}
+
 static int msi3101_probe(struct usb_interface *intf,
                 const struct usb_device_id *id)
 {
         struct usb_device *udev = interface_to_usbdev(intf);
         struct msi3101_state *s = NULL;
-        const struct v4l2_ctrl_ops *ops = &msi3101_ctrl_ops;
+        struct v4l2_subdev *sd;
+        struct spi_master *master;
         int ret;
+        static struct spi_board_info board_info = {
+                .modalias               = "msi001",
+                .bus_num                = 0,
+                .chip_select            = 0,
+                .max_speed_hz           = 12000000,
+        };
 
         s = kzalloc(sizeof(struct msi3101_state), GFP_KERNEL);
         if (s == NULL) {
@@ -1632,7 +1396,7 @@ static int msi3101_probe(struct usb_interface *intf,
         spin_lock_init(&s->queued_bufs_lock);
         INIT_LIST_HEAD(&s->queued_bufs);
         s->udev = udev;
-        s->f_adc = bands_adc[0].rangelow;
+        s->f_adc = bands[0].rangelow;
         s->pixelformat = V4L2_SDR_FMT_CU8;
 
         /* Init videobuf2 queue structure */
@@ -1656,34 +1420,53 @@ static int msi3101_probe(struct usb_interface *intf,
         set_bit(V4L2_FL_USE_FH_PRIO, &s->vdev.flags);
         video_set_drvdata(&s->vdev, s);
 
-        /* Register controls */
-        v4l2_ctrl_handler_init(&s->hdl, 5);
-        s->bandwidth_auto = v4l2_ctrl_new_std(&s->hdl, ops,
-                        V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
-        s->bandwidth = v4l2_ctrl_new_std(&s->hdl, ops,
-                        V4L2_CID_RF_TUNER_BANDWIDTH, 0, 8000000, 1, 0);
-        v4l2_ctrl_auto_cluster(2, &s->bandwidth_auto, 0, false);
-        s->lna_gain = v4l2_ctrl_new_std(&s->hdl, ops,
-                        V4L2_CID_RF_TUNER_LNA_GAIN, 0, 1, 1, 1);
-        s->mixer_gain = v4l2_ctrl_new_std(&s->hdl, ops,
-                        V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 1, 1, 1);
-        s->if_gain = v4l2_ctrl_new_std(&s->hdl, ops,
-                        V4L2_CID_RF_TUNER_IF_GAIN, 0, 59, 1, 0);
-        if (s->hdl.error) {
-                ret = s->hdl.error;
-                dev_err(&s->udev->dev, "Could not initialize controls\n");
-                goto err_free_controls;
-        }
-
         /* Register the v4l2_device structure */
         s->v4l2_dev.release = msi3101_video_release;
         ret = v4l2_device_register(&intf->dev, &s->v4l2_dev);
         if (ret) {
                 dev_err(&s->udev->dev,
                                 "Failed to register v4l2-device (%d)\n", ret);
+                goto err_free_mem;
+        }
+
+        /* SPI master adapter */
+        master = spi_alloc_master(&s->udev->dev, 0);
+        if (master == NULL) {
+                ret = -ENOMEM;
+                goto err_unregister_v4l2_dev;
+        }
+
+        s->master = master;
+        master->bus_num = 0;
+        master->num_chipselect = 1;
+        master->transfer_one_message = msi3101_transfer_one_message;
+        spi_master_set_devdata(master, s);
+        ret = spi_register_master(master);
+        if (ret) {
+                spi_master_put(master);
+                goto err_unregister_v4l2_dev;
+        }
+
+        /* load v4l2 subdevice */
+        sd = v4l2_spi_new_subdev(&s->v4l2_dev, master, &board_info);
+        s->v4l2_subdev = sd;
+        if (sd == NULL) {
+                dev_err(&s->udev->dev, "cannot get v4l2 subdevice\n");
+                ret = -ENODEV;
+                goto err_unregister_master;
+        }
+
+        /* Register controls */
+        v4l2_ctrl_handler_init(&s->hdl, 0);
+        if (s->hdl.error) {
+                ret = s->hdl.error;
+                dev_err(&s->udev->dev, "Could not initialize controls\n");
                 goto err_free_controls;
         }
 
+        /* currently all controls are from subdev */
+        v4l2_ctrl_add_handler(&s->hdl, sd->ctrl_handler, NULL);
+
         s->v4l2_dev.ctrl_handler = &s->hdl;
         s->vdev.v4l2_dev = &s->v4l2_dev;
         s->vdev.lock = &s->v4l2_lock;
@@ -1700,10 +1483,12 @@ static int msi3101_probe(struct usb_interface *intf,
 
         return 0;
 
-err_unregister_v4l2_dev:
-        v4l2_device_unregister(&s->v4l2_dev);
 err_free_controls:
         v4l2_ctrl_handler_free(&s->hdl);
+err_unregister_master:
+        spi_unregister_master(s->master);
+err_unregister_v4l2_dev:
+        v4l2_device_unregister(&s->v4l2_dev);
 err_free_mem:
         kfree(s);
         return ret;