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    Subject[PATCH v4 2/6] drivers:staging: ti-st: fmdrv_v4l2 sources
    Date
    From: Manjunatha Halli <manjunatha_halli@ti.com>

    This module interfaces V4L2 subsystem and FM common
    module. It registers itself with V4L2 as Radio module.

    Signed-off-by: Manjunatha Halli <manjunatha_halli@ti.com>
    ---
    drivers/staging/ti-st/fmdrv_v4l2.c | 757 ++++++++++++++++++++++++++++++++++++
    drivers/staging/ti-st/fmdrv_v4l2.h | 32 ++
    2 files changed, 789 insertions(+), 0 deletions(-)
    create mode 100644 drivers/staging/ti-st/fmdrv_v4l2.c
    create mode 100644 drivers/staging/ti-st/fmdrv_v4l2.h

    diff --git a/drivers/staging/ti-st/fmdrv_v4l2.c b/drivers/staging/ti-st/fmdrv_v4l2.c
    new file mode 100644
    index 0000000..687d10f
    --- /dev/null
    +++ b/drivers/staging/ti-st/fmdrv_v4l2.c
    @@ -0,0 +1,757 @@
    +/*
    + * FM Driver for Connectivity chip of Texas Instruments.
    + * This file provides interfaces to V4L2 subsystem.
    + *
    + * This module registers with V4L2 subsystem as Radio
    + * data system interface (/dev/radio). During the registration,
    + * it will expose two set of function pointers.
    + *
    + * 1) File operation related API (open, close, read, write, poll...etc).
    + * 2) Set of V4L2 IOCTL complaint API.
    + *
    + * Copyright (C) 2010 Texas Instruments
    + * Author: Raja Mani <raja_mani@ti.com>
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License version 2 as
    + * published by the Free Software Foundation.
    + *
    + * This program is distributed in the hope that it will be useful,
    + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    + * GNU General Public License for more details.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program; if not, write to the Free Software
    + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    + *
    + */
    +
    +#include "fmdrv.h"
    +#include "fmdrv_v4l2.h"
    +#include "fmdrv_common.h"
    +#include "fmdrv_rx.h"
    +#include "fmdrv_tx.h"
    +
    +static struct video_device *gradio_dev;
    +static unsigned char radio_disconnected;
    +
    +/* Query control */
    +static struct v4l2_queryctrl fmdrv_v4l2_queryctrl[] = {
    + {
    + .id = V4L2_CID_AUDIO_VOLUME,
    + .type = V4L2_CTRL_TYPE_INTEGER,
    + .name = "Volume",
    + .minimum = FM_RX_VOLUME_MIN,
    + .maximum = FM_RX_VOLUME_MAX,
    + .step = 1,
    + .default_value = FM_DEFAULT_RX_VOLUME,
    + },
    + {
    + .id = V4L2_CID_AUDIO_BALANCE,
    + .flags = V4L2_CTRL_FLAG_DISABLED,
    + },
    + {
    + .id = V4L2_CID_AUDIO_BASS,
    + .flags = V4L2_CTRL_FLAG_DISABLED,
    + },
    + {
    + .id = V4L2_CID_AUDIO_TREBLE,
    + .flags = V4L2_CTRL_FLAG_DISABLED,
    + },
    + {
    + .id = V4L2_CID_AUDIO_MUTE,
    + .type = V4L2_CTRL_TYPE_BOOLEAN,
    + .name = "Mute",
    + .minimum = 0,
    + .maximum = 2,
    + .step = 1,
    + .default_value = FM_MUTE_OFF,
    + },
    + {
    + .id = V4L2_CID_AUDIO_LOUDNESS,
    + .flags = V4L2_CTRL_FLAG_DISABLED,
    + },
    +};
    +
    +/* -- V4L2 RADIO (/dev/radioX) device file operation interfaces --- */
    +
    +/* Read RX RDS data */
    +static ssize_t fm_v4l2_fops_read(struct file *file, char __user * buf,
    + size_t count, loff_t *ppos)
    +{
    + unsigned char rds_mode;
    + int ret;
    + struct fmdrv_ops *fmdev;
    +
    + fmdev = video_drvdata(file);
    +
    + if (!radio_disconnected) {
    + pr_err("(fmdrv): FM device is already disconnected\n");
    + return -EIO;
    + }
    +
    + /* Turn on RDS mode , if it is disabled */
    + ret = fm_rx_get_rds_mode(fmdev, &rds_mode);
    + if (ret < 0) {
    + pr_err("(fmdrv): Unable to read current rds mode\n");
    + return ret;
    + }
    +
    + if (rds_mode == FM_RDS_DISABLE) {
    + ret = fmc_set_rds_mode(fmdev, FM_RDS_ENABLE);
    + if (ret < 0) {
    + pr_err("(fmdrv): Failed to enable rds mode\n");
    + return ret;
    + }
    + }
    +
    + /* Copy RDS data from internal buffer to user buffer */
    + ret = fmc_transfer_rds_from_internal_buff(fmdev, file, buf, count);
    +
    + return ret;
    +}
    +
    +/* Write TX RDS data */
    +static ssize_t fm_v4l2_fops_write(struct file *file, const char __user * buf,
    + size_t count, loff_t *ppos)
    +{
    + struct tx_rds rds;
    + int ret;
    + struct fmdrv_ops *fmdev;
    +
    + ret = copy_from_user(&rds, buf, sizeof(rds));
    + pr_debug("(fmdrv): (%d)type: %d, text %s, af %d\n",
    + ret, rds.text_type, rds.text, rds.af_freq);
    +
    + fmdev = video_drvdata(file);
    + fm_tx_set_radio_text(fmdev, rds.text, rds.text_type);
    + fm_tx_set_af(fmdev, rds.af_freq);
    +
    + return 0;
    +}
    +
    +static unsigned int fm_v4l2_fops_poll(struct file *file,
    + struct poll_table_struct *pts)
    +{
    + int ret;
    + struct fmdrv_ops *fmdev;
    +
    + fmdev = video_drvdata(file);
    + ret = fmc_is_rds_data_available(fmdev, file, pts);
    + if (ret < 0)
    + return POLLIN | POLLRDNORM;
    +
    + return 0;
    +}
    +
    +/*
    + * Handle open request for "/dev/radioX" device.
    + * Start with FM RX mode as default.
    + */
    +static int fm_v4l2_fops_open(struct file *file)
    +{
    + int ret;
    + struct fmdrv_ops *fmdev = NULL;
    +
    + /* Don't allow multiple open */
    + if (radio_disconnected) {
    + pr_err("(fmdrv): FM device is already opened\n");
    + return -EBUSY;
    + }
    +
    + fmdev = video_drvdata(file);
    +
    + ret = fmc_prepare(fmdev);
    + if (ret < 0) {
    + pr_err("(fmdrv): Unable to prepare FM CORE\n");
    + return ret;
    + }
    +
    + pr_debug("(fmdrv): Load FM RX firmware..\n");
    +
    + ret = fmc_set_mode(fmdev, FM_MODE_RX);
    + if (ret < 0) {
    + pr_err("(fmdrv): Unable to load FM RX firmware\n");
    + return ret;
    + }
    + radio_disconnected = 1;
    +
    + return ret;
    +}
    +
    +static int fm_v4l2_fops_release(struct file *file)
    +{
    + int ret = 0;
    + struct fmdrv_ops *fmdev;
    +
    + fmdev = video_drvdata(file);
    + if (!radio_disconnected) {
    + pr_debug("(fmdrv): FM device is already closed\n");
    + return ret;
    + }
    +
    + ret = fmc_set_mode(fmdev, FM_MODE_OFF);
    + if (ret < 0) {
    + pr_err("(fmdrv): Unable to turn off the chip\n");
    + return ret;
    + }
    +
    + ret = fmc_release(fmdev);
    + if (ret < 0) {
    + pr_err("(fmdrv): FM CORE release failed\n");
    + return ret;
    + }
    + radio_disconnected = 0;
    +
    + return ret;
    +}
    +
    +/* V4L2 RADIO (/dev/radioX) device IOCTL interfaces */
    +static int fm_v4l2_vidioc_querycap(struct file *file, void *priv,
    + struct v4l2_capability *capability)
    +{
    + strlcpy(capability->driver, FM_DRV_NAME, sizeof(capability->driver));
    + strlcpy(capability->card, FM_DRV_CARD_SHORT_NAME,
    + sizeof(capability->card));
    + sprintf(capability->bus_info, "UART");
    + capability->version = FM_DRV_RADIO_VERSION;
    + capability->capabilities = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_TUNER |
    + V4L2_CAP_RADIO | V4L2_CAP_MODULATOR |
    + V4L2_CAP_AUDIO | V4L2_CAP_READWRITE |
    + V4L2_CAP_RDS_CAPTURE;
    +
    + return 0;
    +}
    +
    +static int fm_v4l2_vidioc_queryctrl(struct file *file, void *priv,
    + struct v4l2_queryctrl *qc)
    +{
    + int index;
    + int ret = -EINVAL;
    +
    + if (qc->id < V4L2_CID_BASE)
    + return ret;
    +
    + /* Search control ID and copy its properties */
    + for (index = 0; index < NO_OF_ENTRIES_IN_ARRAY(fmdrv_v4l2_queryctrl);\
    + index++) {
    + if (qc->id && qc->id == fmdrv_v4l2_queryctrl[index].id) {
    + memcpy(qc, &(fmdrv_v4l2_queryctrl[index]), sizeof(*qc));
    + ret = 0;
    + break;
    + }
    + }
    + return ret;
    +}
    +
    +static int fm_v4l2_vidioc_g_ctrl(struct file *file, void *priv,
    + struct v4l2_control *ctrl)
    +{
    + int ret = -EINVAL;
    + unsigned short curr_vol;
    + unsigned char curr_mute_mode;
    + unsigned char chanl_spacing;
    + unsigned char region;
    + unsigned char afreq;
    + short threshold;
    + struct fmdrv_ops *fmdev;
    +
    + fmdev = video_drvdata(file);
    +
    + switch (ctrl->id) {
    + case V4L2_CID_AUDIO_MUTE: /* get mute mode */
    + ret = fm_rx_get_mute_mode(fmdev, &curr_mute_mode);
    + if (ret < 0)
    + return ret;
    + ctrl->value = curr_mute_mode;
    + break;
    + case V4L2_CID_AUDIO_VOLUME: /* get volume */
    + ret = fm_rx_get_volume(fmdev, &curr_vol);
    + if (ret < 0)
    + return ret;
    + ctrl->value = curr_vol;
    + break;
    + case V4L2_CID_FM_BAND:
    + if (fmdev->curr_fmmode != FM_MODE_RX)
    + break;
    + fm_rx_get_region(fmdev, &region);
    + if (region == FM_BAND_EUROPE_US)
    + ctrl->value = V4L2_FM_BAND_OTHER;
    + else
    + ctrl->value = V4L2_FM_BAND_JAPAN;
    + ret = 0;
    + 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;
    +
    + case V4L2_CID_CHANNEL_SPACING: /* channel spacing */
    + ret = fm_rx_get_chanl_spacing(fmdev, &chanl_spacing);
    + ctrl->value = chanl_spacing;
    + break;
    + }
    +
    + 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 subtracting 122 from it. Refer to TI FM data sheet for details.
    + */
    +static int fm_v4l2_vidioc_s_ctrl(struct file *file, void *priv,
    + struct v4l2_control *ctrl)
    +{
    + struct fmdrv_ops *fmdev = video_drvdata(file);
    + unsigned int emph_filter;
    + unsigned char region;
    + int ret = -EINVAL;
    +
    + switch (ctrl->id) {
    + case V4L2_CID_AUDIO_MUTE: /* set mute */
    + ret = fmc_set_mute_mode(fmdev, (unsigned char)ctrl->value);
    + break;
    +
    + case V4L2_CID_AUDIO_VOLUME: /* set volume */
    + ret = fm_rx_set_volume(fmdev, (unsigned short)ctrl->value);
    + 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;
    +
    + case V4L2_CID_CHANNEL_SPACING: /* channel spacing */
    + ret = fm_rx_set_chanl_spacing(fmdev,
    + (unsigned int) ctrl->value);
    + break;
    + }
    +
    + return ret;
    +}
    +
    +static int fm_v4l2_vidioc_g_audio(struct file *file, void *priv,
    + struct v4l2_audio *audio)
    +{
    + memset(audio, 0, sizeof(*audio));
    + audio->index = 0;
    + strcpy(audio->name, "Radio");
    + audio->capability = V4L2_AUDCAP_STEREO;
    +
    + return 0;
    +}
    +
    +static int fm_v4l2_vidioc_s_audio(struct file *file, void *priv,
    + struct v4l2_audio *audio)
    +{
    + if (audio->index != 0)
    + return -EINVAL;
    +
    + return 0;
    +}
    +
    +/* 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)
    +{
    + struct fmdrv_ops *fmdev = video_drvdata(file);
    + unsigned int bottom_frequency;
    + unsigned int top_frequency;
    + unsigned short stereo_mono_mode;
    + unsigned short rssilvl;
    + int ret = -EINVAL;
    +
    + if (tuner->index != 0)
    + return ret;
    +
    + if (fmdev->curr_fmmode != FM_MODE_RX)
    + return -EPERM;
    +
    + ret = fm_rx_get_currband_freq_range(fmdev, &bottom_frequency,
    + &top_frequency);
    + if (ret != 0)
    + return ret;
    +
    + ret = fm_rx_get_stereo_mono(fmdev, &stereo_mono_mode);
    + if (ret != 0)
    + return ret;
    +
    + ret = fm_rx_get_rssi_level(fmdev, &rssilvl);
    + if (ret != 0)
    + return ret;
    +
    + strcpy(tuner->name, "FM");
    + tuner->type = V4L2_TUNER_RADIO;
    + /* Store rangelow and rangehigh freq in unit of 62.5 Hz */
    + 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 |
    + V4L2_TUNER_CAP_LOW;
    + tuner->audmode = (stereo_mono_mode ?
    + V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO);
    +
    + /*
    + * Actual rssi value lies in between -128 to +127.
    + * Convert this range from 0 to 255 by adding +128
    + */
    + rssilvl += 128;
    +
    + /*
    + * Return signal strength value should be within 0 to 65535.
    + * Find out correct signal radio by multiplying (65535/255) = 257
    + */
    + tuner->signal = rssilvl * 257;
    + tuner->afc = 0;
    +
    + return ret;
    +}
    +
    +/*
    + * Set tuner attributes. If current mode is NOT RX, set to RX.
    + * Currently, we set only audio mode (mono/stereo) and RDS state (on/off).
    + * Should we set other tuner attributes, too?
    + */
    +static int fm_v4l2_vidioc_s_tuner(struct file *file, void *priv,
    + struct v4l2_tuner *tuner)
    +{
    + struct fmdrv_ops *fmdev = video_drvdata(file);
    + unsigned short aud_mode;
    + unsigned char rds_mode;
    + int ret = -EINVAL;
    +
    + if (tuner->index != 0)
    + return ret;
    +
    + aud_mode = (tuner->audmode == V4L2_TUNER_MODE_STEREO) ?
    + FM_STEREO_MODE : FM_MONO_MODE;
    + rds_mode = (tuner->rxsubchans & V4L2_TUNER_SUB_RDS) ?
    + FM_RDS_ENABLE : FM_RDS_DISABLE;
    +
    + 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 "
    + "write tuner attributes\n");
    + return ret;
    + }
    + }
    +
    + ret = fmc_set_stereo_mono(fmdev, aud_mode);
    + if (ret < 0) {
    + pr_err("(fmdrv): Failed to set RX stereo/mono mode\n");
    + return ret;
    + }
    +
    + ret = fmc_set_rds_mode(fmdev, rds_mode);
    + if (ret < 0)
    + pr_err("(fmdrv): Failed to set RX RDS mode\n");
    +
    + return ret;
    +}
    +
    +/* Get tuner or modulator radio frequency */
    +static int fm_v4l2_vidioc_g_frequency(struct file *file, void *priv,
    + struct v4l2_frequency *freq)
    +{
    + int ret;
    + struct fmdrv_ops *fmdev = video_drvdata(file);
    +
    + ret = fmc_get_frequency(fmdev, &freq->frequency);
    + if (ret < 0) {
    + pr_err("(fmdrv): Failed to get frequency\n");
    + return ret;
    + }
    +
    + freq->frequency =
    + (unsigned int) freq->frequency * 16; /* unit of 62.5 Hz*/
    +
    + return 0;
    +}
    +
    +/* Set tuner or modulator radio frequency */
    +static int fm_v4l2_vidioc_s_frequency(struct file *file, void *priv,
    + struct v4l2_frequency *freq)
    +{
    + struct fmdrv_ops *fmdev = video_drvdata(file);
    + int ret;
    +
    + /*
    + * As V4L2_TUNER_CAP_LOW is set 1 user sends the frequency
    + * in units of 62.5 Hz.
    + */
    + freq->frequency = (unsigned int)(freq->frequency / 16);
    +
    + ret = fmc_set_frequency(fmdev, freq->frequency);
    +
    + return ret;
    +}
    +
    +/* Set hardware frequency seek. If current mode is NOT RX, set it RX. */
    +static int fm_v4l2_vidioc_s_hw_freq_seek(struct file *file, void *priv,
    + struct v4l2_hw_freq_seek *seek)
    +{
    + struct fmdrv_ops *fmdev = video_drvdata(file);
    + int ret;
    +
    + 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 "
    + "start HW frequency seek\n");
    + return ret;
    + }
    + }
    +
    + ret = fm_rx_seek(fmdev, seek->seek_upward, seek->wrap_around);
    + if (ret < 0)
    + pr_err("(fmdrv): RX seek failed - %d\n", ret);
    +
    + return ret;
    +}
    +
    +static int fm_v4l2_vidioc_g_ext_ctrls(struct file *file, void *priv,
    + struct v4l2_ext_controls *ext_ctrls)
    +{
    + struct v4l2_control ctrl;
    + int index;
    + int ret = -EINVAL;
    +
    + 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)
    +{
    + struct v4l2_control ctrl;
    + int index;
    + int ret = -EINVAL;
    +
    + 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)
    +{
    + struct fmdrv_ops *fmdev = video_drvdata(file);;
    +
    + if (mod->index != 0)
    + return -EINVAL;
    +
    + if (fmdev->curr_fmmode != FM_MODE_TX)
    + return -EPERM;
    +
    + 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;
    +
    + return 0;
    +}
    +
    +/* 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)
    +{
    + struct fmdrv_ops *fmdev = video_drvdata(file);
    + unsigned char rds_mode;
    + unsigned short aud_mode;
    + int ret;
    +
    + if (mod->index != 0)
    + return -EINVAL;
    +
    + 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");
    + return ret;
    + }
    + }
    +
    + 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");
    + return ret;
    + }
    +
    + ret = fm_tx_set_rds_mode(fmdev, rds_mode);
    + if (ret < 0)
    + pr_err("(fmdrv): Failed to set rds mode for TX\n");
    +
    + return ret;
    +}
    +
    +static const struct v4l2_file_operations fm_drv_fops = {
    + .owner = THIS_MODULE,
    + .read = fm_v4l2_fops_read,
    + .write = fm_v4l2_fops_write,
    + .poll = fm_v4l2_fops_poll,
    + .ioctl = video_ioctl2,
    + .open = fm_v4l2_fops_open,
    + .release = fm_v4l2_fops_release,
    +};
    +
    +static const struct v4l2_ioctl_ops fm_drv_ioctl_ops = {
    + .vidioc_querycap = fm_v4l2_vidioc_querycap,
    + .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_g_modulator = fm_v4l2_vidioc_g_modulator,
    + .vidioc_s_modulator = fm_v4l2_vidioc_s_modulator
    +};
    +
    +/* V4L2 RADIO device parent structure */
    +static struct video_device fm_viddev_template = {
    + .fops = &fm_drv_fops,
    + .ioctl_ops = &fm_drv_ioctl_ops,
    + .name = FM_DRV_NAME,
    + .release = video_device_release,
    +};
    +
    +int fm_v4l2_init_video_device(struct fmdrv_ops *fmdev, int radio_nr)
    +{
    +
    + /* Allocate new video device */
    + gradio_dev = video_device_alloc();
    + if (NULL == gradio_dev) {
    + pr_err("(fmdrv): Can't allocate video device\n");
    + return -ENOMEM;
    + }
    +
    + /* Setup FM driver's V4L2 properties */
    + memcpy(gradio_dev, &fm_viddev_template, sizeof(fm_viddev_template));
    +
    + video_set_drvdata(gradio_dev, fmdev);
    +
    + /* Register with V4L2 subsystem as RADIO device */
    + if (video_register_device(gradio_dev, VFL_TYPE_RADIO, radio_nr)) {
    + video_device_release(gradio_dev);
    + pr_err("(fmdrv): Could not register video device\n");
    + return -ENOMEM;
    + }
    +
    + fmdev->radio_dev = gradio_dev;
    +
    + return 0;
    +}
    +
    +void *fm_v4l2_deinit_video_device(void)
    +{
    + struct fmdrv_ops *fmdev;
    +
    + fmdev = video_get_drvdata(gradio_dev);
    + /* Unregister RADIO device from V4L2 subsystem */
    + video_unregister_device(gradio_dev);
    +
    + return fmdev;
    +}
    diff --git a/drivers/staging/ti-st/fmdrv_v4l2.h b/drivers/staging/ti-st/fmdrv_v4l2.h
    new file mode 100644
    index 0000000..6f0a415
    --- /dev/null
    +++ b/drivers/staging/ti-st/fmdrv_v4l2.h
    @@ -0,0 +1,32 @@
    +/*
    + * FM Driver for Connectivity chip of Texas Instruments.
    + *
    + * FM V4L2 module header.
    + *
    + * Copyright (C) 2010 Texas Instruments
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License version 2 as
    + * published by the Free Software Foundation.
    + *
    + * This program is distributed in the hope that it will be useful,
    + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    + * GNU General Public License for more details.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program; if not, write to the Free Software
    + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    + *
    + */
    +
    +#ifndef _FMDRV_V4L2_H
    +#define _FMDRV_V4L2_H
    +
    +#include <media/v4l2-common.h>
    +#include <media/v4l2-ioctl.h>
    +
    +int fm_v4l2_init_video_device(struct fmdrv_ops *, int);
    +void *fm_v4l2_deinit_video_device(void);
    +
    +#endif
    --
    1.5.6.3


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