From: Raja Mani <raja_m...@ti.com>
Add FM TX API calls in FM V4L2 module which will internally link to V4L2
subsystem. It includes ,
1) Support for set/get modulator attributes and extended control.
2) fm_v4l2_vidioc_s_ctrl ()
+ added support for V4L2_CID_TUNE_POWER_LEVEL,
V4L2_CID_TUNE_PREEMPHASIS, V4L2_CID_FM_BAND,
V4L2_CID_TUNE_ANTENNA_CAPACITOR
3) fm_v4l2_vidioc_g_ctrl ()
+ added support for V4L2_CID_TUNE_PREEMPHASIS, V4L2_CID_FM_BAND
Signed-off-by: Raja Mani <raja_m...@ti.com>
Signed-off-by: Pramodh AG <pramodh...@ti.com>
---
drivers/staging/ti-st/fmdrv_v4l2.c | 243 ++++++++++++++++++++++++++++++++---
1 files changed, 222 insertions(+), 21 deletions(-)
diff --git a/drivers/staging/ti-st/fmdrv_v4l2.c
b/drivers/staging/ti-st/fmdrv_v4l2.c
index c546a0f..d76344e 100644
--- a/drivers/staging/ti-st/fmdrv_v4l2.c
+++ b/drivers/staging/ti-st/fmdrv_v4l2.c
@@ -30,8 +30,7 @@
#include "fmdrv_v4l2.h"
#include "fmdrv_common.h"
#include "fmdrv_rx.h"
-/* TODO: Enable when FM TX is supported */
-/* #include "fmdrv_tx.h" */
+#include "fmdrv_tx.h"
#ifndef DEBUG
#ifdef pr_info
@@ -134,9 +133,8 @@ static ssize_t fm_v4l2_fops_write(struct file *file, const
char __user * buf,
ret, rds.text_type, rds.text, rds.af_freq);
fmdev = video_drvdata(file);
- /* TODO: Enable when FM TX is supported */
- /* fm_tx_set_radio_text(fmdev, rds.text, rds.text_type); */
- /* fm_tx_set_af(fmdev, rds.af_freq); */
+ fm_tx_set_radio_text(fmdev, rds.text, rds.text_type);
+ fm_tx_set_af(fmdev, rds.af_freq);
return 0;
}
@@ -257,6 +255,9 @@ static int fm_v4l2_vidioc_g_ctrl(struct file *file, void
*priv,
int ret = -EINVAL;
unsigned short curr_vol;
unsigned char curr_mute_mode;
+ unsigned char region;
+ unsigned char afreq;
+ short threshold;
struct fmdrv_ops *fmdev;
fmdev = video_drvdata(file);
@@ -274,16 +275,48 @@ static int fm_v4l2_vidioc_g_ctrl(struct file *file, void
*priv,
goto exit;
ctrl->value = curr_vol;
break;
+ case V4L2_CID_FM_BAND:
+ if (fmdev->curr_fmmode != FM_MODE_RX)
+ break;
+ ret = fm_rx_get_region(fmdev, ®ion);
+ if (ret < 0)
+ break;
+ if (region == FM_BAND_EUROPE_US)
+ ctrl->value = V4L2_FM_BAND_OTHER;
+ else
+ ctrl->value = V4L2_FM_BAND_JAPAN;
+ break;
+ case V4L2_CID_RSSI_THRESHOLD:
+ ret = fm_rx_get_rssi_threshold(fmdev, &threshold);
+ if (ret == 0)
+ ctrl->value = threshold;
+ break;
+ case V4L2_CID_TUNE_AF:
+ ret = fm_rx_get_af_switch(fmdev, &afreq);
+ if (ret == 0)
+ ctrl->value = afreq;
+ break;
+ case V4L2_CID_TUNE_PREEMPHASIS:
+ ctrl->value = fmdev->tx_data.preemph;
+ break;
}
exit:
return ret;
}
+/* Change the value of specified control.
+ * V4L2_CID_TUNE_POWER_LEVEL: Application will specify power level value in
+ * units of dB/uV, whereas range and step are specific to FM chip. For TI's WL
+ * chips, convert application specified power level value to chip specific
+ * value by substracting it with 122. Refer to TI FM data sheet for details.
+ */
static int fm_v4l2_vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
int ret = -EINVAL;
+ unsigned int emph_filter;
+ unsigned char region;
struct fmdrv_ops *fmdev;
fmdev = video_drvdata(file);
@@ -291,17 +324,61 @@ static int fm_v4l2_vidioc_s_ctrl(struct file *file, void
*priv,
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE: /* set mute */
ret = fmc_set_mute_mode(fmdev, (unsigned char)ctrl->value);
- if (ret < 0)
- goto exit;
break;
case V4L2_CID_AUDIO_VOLUME: /* set volume */
ret = fm_rx_set_volume(fmdev, (unsigned short)ctrl->value);
- if (ret < 0)
- goto exit;
+ break;
+ case V4L2_CID_TUNE_POWER_LEVEL: /* set TX power level - ext control */
+ if (ctrl->value >= FM_PWR_LVL_LOW &&
+ ctrl->value <= FM_PWR_LVL_HIGH) {
+ ctrl->value = FM_PWR_LVL_HIGH - ctrl->value;
+ ret = fm_tx_set_pwr_lvl(fmdev,
+ (unsigned char)ctrl->value);
+ } else
+ ret = -ERANGE;
+ break;
+ case V4L2_CID_FM_BAND:
+ if (ctrl->value < V4L2_FM_BAND_OTHER ||
+ ctrl->value > V4L2_FM_BAND_JAPAN) {
+ ret = -ERANGE;
+ break;
+ }
+ if (ctrl->value == V4L2_FM_BAND_OTHER)
+ region = FM_BAND_EUROPE_US;
+ else
+ region = FM_BAND_JAPAN;
+ ret = fmc_set_region(fmdev, region);
+ break;
+ case V4L2_CID_RSSI_THRESHOLD:
+ ret = fm_rx_set_rssi_threshold(fmdev, (short)ctrl->value);
+ break;
+ case V4L2_CID_TUNE_AF:
+ ret = fm_rx_set_af_switch(fmdev, (unsigned char)ctrl->value);
+ break;
+ case V4L2_CID_TUNE_PREEMPHASIS:
+ if (ctrl->value < V4L2_PREEMPHASIS_DISABLED ||
+ ctrl->value > V4L2_PREEMPHASIS_75_uS) {
+ ret = -EINVAL;
+ break;
+ }
+ if (ctrl->value == V4L2_PREEMPHASIS_DISABLED)
+ emph_filter = FM_TX_PREEMPH_OFF;
+ else if (ctrl->value == V4L2_PREEMPHASIS_50_uS)
+ emph_filter = FM_TX_PREEMPH_50US;
+ else
+ emph_filter = FM_TX_PREEMPH_75US;
+ ret = fm_tx_set_preemph_filter(fmdev, emph_filter);
+ break;
+ case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
+ if (ctrl->value == FM_TX_ANT_IMP_50 ||
+ ctrl->value == FM_TX_ANT_IMP_200 ||
+ ctrl->value == FM_TX_ANT_IMP_500)
+ ret = fm_tx_set_ant_imp(fmdev, ctrl->value);
+ else
+ ret = -EINVAL;
break;
}
-exit:
return ret;
}
@@ -324,7 +401,7 @@ static int fm_v4l2_vidioc_s_audio(struct file *file, void
*priv,
return 0;
}
-/* Get tuner attributes. If current mode is NOT RX, set to RX */
+/* Get tuner attributes. If current mode is NOT RX, return error */
static int fm_v4l2_vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *tuner)
{
@@ -340,12 +417,8 @@ static int fm_v4l2_vidioc_g_tuner(struct file *file, void
*priv,
fmdev = video_drvdata(file);
if (fmdev->curr_fmmode != FM_MODE_RX) {
- ret = fmc_set_mode(fmdev, FM_MODE_RX);
- if (ret < 0) {
- pr_err("(fmdrv): Failed to set RX mode; unable to " \
- "read tuner attributes\n");
- goto exit;
- }
+ ret = -EPERM;
+ goto exit;
}
ret = fm_rx_get_currband_lowhigh_freq(fmdev, &bottom_frequency,
@@ -364,11 +437,12 @@ static int fm_v4l2_vidioc_g_tuner(struct file *file, void
*priv,
strcpy(tuner->name, "FM");
tuner->type = V4L2_TUNER_RADIO;
/* Store rangelow and rangehigh freq in unit of 62.5 KHz */
- tuner->rangelow = (bottom_frequency * 10000) / 625;
- tuner->rangehigh = (top_frequency * 10000) / 625;
+ tuner->rangelow = bottom_frequency * 16;
+ tuner->rangehigh = top_frequency * 16;
tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO |
((fmdev->rx.rds.flag == FM_RDS_ENABLE) ? V4L2_TUNER_SUB_RDS : 0);
- tuner->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS;
+ tuner->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS |
+ V4L2_TUNER_CAP_LOW;
tuner->audmode = (stereo_mono_mode ?
V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO);
@@ -440,6 +514,8 @@ static int fm_v4l2_vidioc_g_frequency(struct file *file,
void *priv,
ret = fmc_get_frequency(fmdev, &freq->frequency);
if (ret < 0)
return ret;
+
+ freq->frequency *= 16; /* unit of 62.5 */
return 0;
}
@@ -451,6 +527,13 @@ static int fm_v4l2_vidioc_s_frequency(struct file *file,
void *priv,
struct fmdrv_ops *fmdev;
fmdev = video_drvdata(file);
+
+ /*
+ * As per V4L2 specifications user sends the frequency
+ * in units of 62.5.
+ */
+ freq->frequency = (unsigned int)(freq->frequency / 16);
+
ret = fmc_set_frequency(fmdev, freq->frequency);
if (ret < 0)
return ret;
@@ -482,6 +565,120 @@ exit:
return ret;
}
+static int fm_v4l2_vidioc_g_ext_ctrls(struct file *file, void *priv,
+ struct v4l2_ext_controls *ext_ctrls)
+{
+ int index;
+ int ret = -EINVAL;
+ struct v4l2_control ctrl;
+
+ if (V4L2_CTRL_CLASS_FM_TX == ext_ctrls->ctrl_class) {
+ for (index = 0; index < ext_ctrls->count; index++) {
+ ctrl.id = ext_ctrls->controls[index].id;
+ ctrl.value = ext_ctrls->controls[index].value;
+ ret = fm_v4l2_vidioc_g_ctrl(file, priv, &ctrl);
+ if (ret < 0) {
+ ext_ctrls->error_idx = index;
+ break;
+ }
+ ext_ctrls->controls[index].value = ctrl.value;
+ }
+ }
+ return ret;
+}
+
+static int fm_v4l2_vidioc_s_ext_ctrls(struct file *file, void *priv,
+ struct v4l2_ext_controls *ext_ctrls)
+{
+ int index;
+ int ret = -EINVAL;
+ struct v4l2_control ctrl;
+
+ if (V4L2_CTRL_CLASS_FM_TX == ext_ctrls->ctrl_class) {
+ for (index = 0; index < ext_ctrls->count; index++) {
+ ctrl.id = ext_ctrls->controls[index].id;
+ ctrl.value = ext_ctrls->controls[index].value;
+ ret = fm_v4l2_vidioc_s_ctrl(file, priv, &ctrl);
+ if (ret < 0) {
+ ext_ctrls->error_idx = index;
+ break;
+ }
+ ext_ctrls->controls[index].value = ctrl.value;
+ }
+ }
+ return ret;
+}
+
+/* Get modulator attributes. If mode is not TX, return no attributes. */
+static int fm_v4l2_vidioc_g_modulator(struct file *file, void *priv,
+ struct v4l2_modulator *mod)
+{
+ int ret = -EPERM;
+ struct fmdrv_ops *fmdev;
+
+ if (mod->index != 0) {
+ ret = -EINVAL;
+ goto exit;
+ }
+
+ fmdev = video_drvdata(file);
+ if (fmdev->curr_fmmode != FM_MODE_TX)
+ goto exit;
+
+ mod->txsubchans = ((fmdev->tx_data.aud_mode == FM_STEREO_MODE) ?
+ V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO) |
+ ((fmdev->tx_data.rds.flag == FM_RDS_ENABLE) ? V4L2_TUNER_SUB_RDS : 0);
+
+ mod->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS;
+ ret = 0;
+exit:
+ return ret;
+}
+
+/* Set modulator attributes. If mode is not TX, set to TX. */
+static int fm_v4l2_vidioc_s_modulator(struct file *file, void *priv,
+ struct v4l2_modulator *mod)
+{
+ unsigned char rds_mode;
+ unsigned short aud_mode;
+ int ret;
+ struct fmdrv_ops *fmdev;
+
+ if (mod->index != 0) {
+ ret = -EINVAL;
+ goto exit;
+ }
+
+ fmdev = video_drvdata(file);
+ if (fmdev->curr_fmmode != FM_MODE_TX) {
+ ret = fmc_set_mode(fmdev, FM_MODE_TX);
+ if (ret != 0) {
+ pr_err("(fmdrv): Failed to set TX mode; unable to " \
+ "set modulator attributes\n");
+ goto exit;
+ }
+ }
+
+ aud_mode = (mod->txsubchans & V4L2_TUNER_SUB_STEREO) ?
+ FM_STEREO_MODE : FM_MONO_MODE;
+ rds_mode = (mod->txsubchans & V4L2_TUNER_SUB_RDS) ?
+ FM_RDS_ENABLE : FM_RDS_DISABLE;
+
+ ret = fm_tx_set_stereo_mono(fmdev, aud_mode);
+ if (ret < 0) {
+ pr_err("(fmdrv): Failed to set mono/stereo mode for TX\n");
+ goto exit;
+ }
+
+ ret = fm_tx_set_rds_mode(fmdev, rds_mode);
+ if (ret < 0) {
+ pr_err("(fmdrv): Failed to set rds mode for TX\n");
+ goto exit;
+ }
+exit:
+ return ret;
+}
+
static const struct v4l2_file_operations fm_drv_fops = {
.owner = THIS_MODULE,
.read = fm_v4l2_fops_read,
@@ -497,13 +694,17 @@ static const struct v4l2_ioctl_ops fm_drv_ioctl_ops = {
.vidioc_queryctrl = fm_v4l2_vidioc_queryctrl,
.vidioc_g_ctrl = fm_v4l2_vidioc_g_ctrl,
.vidioc_s_ctrl = fm_v4l2_vidioc_s_ctrl,
+ .vidioc_g_ext_ctrls = fm_v4l2_vidioc_g_ext_ctrls,
+ .vidioc_s_ext_ctrls = fm_v4l2_vidioc_s_ext_ctrls,
.vidioc_g_audio = fm_v4l2_vidioc_g_audio,
.vidioc_s_audio = fm_v4l2_vidioc_s_audio,
.vidioc_g_tuner = fm_v4l2_vidioc_g_tuner,
.vidioc_s_tuner = fm_v4l2_vidioc_s_tuner,
.vidioc_g_frequency = fm_v4l2_vidioc_g_frequency,
.vidioc_s_frequency = fm_v4l2_vidioc_s_frequency,
- .vidioc_s_hw_freq_seek = fm_v4l2_vidioc_s_hw_freq_seek
+ .vidioc_s_hw_freq_seek = fm_v4l2_vidioc_s_hw_freq_seek,
+ .vidioc_g_modulator = fm_v4l2_vidioc_g_modulator,
+ .vidioc_s_modulator = fm_v4l2_vidioc_s_modulator
};
/* V4L2 RADIO device parent structure */
--
1.5.6.3
--
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