[deliverable/linux.git] / drivers / media / radio / wl128x / fmdrv_v4l2.c

/*
 *  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) 2011 Texas Instruments
 *  Author: Raja Mani <raja_mani@ti.com>
 *  Author: Manjunatha Halli <manjunatha_halli@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 <linux/export.h>

#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 u8 radio_disconnected;

/* -- 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)
{
	u8 rds_mode;
	int ret;
	struct fmdev *fmdev;

	fmdev = video_drvdata(file);

	if (!radio_disconnected) {
		fmerr("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) {
		fmerr("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) {
			fmerr("Failed to enable rds mode\n");
			return ret;
		}
	}

	/* Copy RDS data from internal buffer to user buffer */
	return fmc_transfer_rds_from_internal_buff(fmdev, file, buf, count);
}

/* 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 fmdev *fmdev;

	ret = copy_from_user(&rds, buf, sizeof(rds));
	rds.text[sizeof(rds.text) - 1] = '\0';
	fmdbg("(%d)type: %d, text %s, af %d\n",
		   ret, rds.text_type, rds.text, rds.af_freq);
	if (ret)
		return -EFAULT;

	fmdev = video_drvdata(file);
	fm_tx_set_radio_text(fmdev, rds.text, rds.text_type);
	fm_tx_set_af(fmdev, rds.af_freq);

	return sizeof(rds);
}

static u32 fm_v4l2_fops_poll(struct file *file, struct poll_table_struct *pts)
{
	int ret;
	struct fmdev *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 fmdev *fmdev = NULL;

	/* Don't allow multiple open */
	if (radio_disconnected) {
		fmerr("FM device is already opened\n");
		return -EBUSY;
	}

	fmdev = video_drvdata(file);

	ret = fmc_prepare(fmdev);
	if (ret < 0) {
		fmerr("Unable to prepare FM CORE\n");
		return ret;
	}

	fmdbg("Load FM RX firmware..\n");

	ret = fmc_set_mode(fmdev, FM_MODE_RX);
	if (ret < 0) {
		fmerr("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;
	struct fmdev *fmdev;

	fmdev = video_drvdata(file);
	if (!radio_disconnected) {
		fmdbg("FM device is already closed\n");
		return 0;
	}

	ret = fmc_set_mode(fmdev, FM_MODE_OFF);
	if (ret < 0) {
		fmerr("Unable to turn off the chip\n");
		return ret;
	}

	ret = fmc_release(fmdev);
	if (ret < 0) {
		fmerr("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->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_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
	struct fmdev *fmdev = container_of(ctrl->handler,
			struct fmdev, ctrl_handler);

	switch (ctrl->id) {
	case  V4L2_CID_TUNE_ANTENNA_CAPACITOR:
		ctrl->val = fm_tx_get_tune_cap_val(fmdev);
		break;
	default:
		fmwarn("%s: Unknown IOCTL: %d\n", __func__, ctrl->id);
		break;
	}

	return 0;
}

static int fm_v4l2_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct fmdev *fmdev = container_of(ctrl->handler,
			struct fmdev, ctrl_handler);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_VOLUME:	/* set volume */
		return fm_rx_set_volume(fmdev, (u16)ctrl->val);

	case V4L2_CID_AUDIO_MUTE:	/* set mute */
		return fmc_set_mute_mode(fmdev, (u8)ctrl->val);

	case V4L2_CID_TUNE_POWER_LEVEL:
		/* set TX power level - ext control */
		return fm_tx_set_pwr_lvl(fmdev, (u8)ctrl->val);

	case V4L2_CID_TUNE_PREEMPHASIS:
		return fm_tx_set_preemph_filter(fmdev, (u8) ctrl->val);

	default:
		return -EINVAL;
	}
}

static int fm_v4l2_vidioc_g_audio(struct file *file, void *priv,
		struct v4l2_audio *audio)
{
	memset(audio, 0, sizeof(*audio));
	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 fmdev *fmdev = video_drvdata(file);
	u32 bottom_freq;
	u32 top_freq;
	u16 stereo_mono_mode;
	u16 rssilvl;
	int ret;

	if (tuner->index != 0)
		return -EINVAL;

	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	ret = fm_rx_get_band_freq_range(fmdev, &bottom_freq, &top_freq);
	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_freq * 16;
	tuner->rangehigh = top_freq * 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 fmdev *fmdev = video_drvdata(file);
	u16 aud_mode;
	u8 rds_mode;
	int ret;

	if (tuner->index != 0)
		return -EINVAL;

	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) {
			fmerr("Failed to set RX mode\n");
			return ret;
		}
	}

	ret = fmc_set_stereo_mono(fmdev, aud_mode);
	if (ret < 0) {
		fmerr("Failed to set RX stereo/mono mode\n");
		return ret;
	}

	ret = fmc_set_rds_mode(fmdev, rds_mode);
	if (ret < 0)
		fmerr("Failed to set RX RDS mode\n");

	return ret;
}

/* Get tuner or modulator radio frequency */
static int fm_v4l2_vidioc_g_freq(struct file *file, void *priv,
		struct v4l2_frequency *freq)
{
	struct fmdev *fmdev = video_drvdata(file);
	int ret;

	ret = fmc_get_freq(fmdev, &freq->frequency);
	if (ret < 0) {
		fmerr("Failed to get frequency\n");
		return ret;
	}

	/* Frequency unit of 62.5 Hz*/
	freq->frequency = (u32) freq->frequency * 16;

	return 0;
}

/* Set tuner or modulator radio frequency */
static int fm_v4l2_vidioc_s_freq(struct file *file, void *priv,
		struct v4l2_frequency *freq)
{
	struct fmdev *fmdev = video_drvdata(file);

	/*
	 * As V4L2_TUNER_CAP_LOW is set 1 user sends the frequency
	 * in units of 62.5 Hz.
	 */
	freq->frequency = (u32)(freq->frequency / 16);

	return fmc_set_freq(fmdev, freq->frequency);
}

/* 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 fmdev *fmdev = video_drvdata(file);
	int ret;

	if (fmdev->curr_fmmode != FM_MODE_RX) {
		ret = fmc_set_mode(fmdev, FM_MODE_RX);
		if (ret != 0) {
			fmerr("Failed to set RX mode\n");
			return ret;
		}
	}

	ret = fm_rx_seek(fmdev, seek->seek_upward, seek->wrap_around,
			seek->spacing);
	if (ret < 0)
		fmerr("RX seek failed - %d\n", ret);

	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 fmdev *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 |
				V4L2_TUNER_CAP_LOW;

	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 fmdev *fmdev = video_drvdata(file);
	u8 rds_mode;
	u16 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) {
			fmerr("Failed to set TX mode\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) {
		fmerr("Failed to set mono/stereo mode for TX\n");
		return ret;
	}
	ret = fm_tx_set_rds_mode(fmdev, rds_mode);
	if (ret < 0)
		fmerr("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,
	.unlocked_ioctl = video_ioctl2,
	.open = fm_v4l2_fops_open,
	.release = fm_v4l2_fops_release,
};

static const struct v4l2_ctrl_ops fm_ctrl_ops = {
	.s_ctrl = fm_v4l2_s_ctrl,
	.g_volatile_ctrl = fm_g_volatile_ctrl,
};
static const struct v4l2_ioctl_ops fm_drv_ioctl_ops = {
	.vidioc_querycap = fm_v4l2_vidioc_querycap,
	.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_freq,
	.vidioc_s_frequency = fm_v4l2_vidioc_s_freq,
	.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 fmdev *fmdev, int radio_nr)
{
	struct v4l2_ctrl *ctrl;
	int ret;

	/* Init mutex for core locking */
	mutex_init(&fmdev->mutex);

	/* Allocate new video device */
	gradio_dev = video_device_alloc();
	if (NULL == gradio_dev) {
		fmerr("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);

	gradio_dev->lock = &fmdev->mutex;

	/* Register with V4L2 subsystem as RADIO device */
	if (video_register_device(gradio_dev, VFL_TYPE_RADIO, radio_nr)) {
		video_device_release(gradio_dev);
		fmerr("Could not register video device\n");
		return -ENOMEM;
	}

	fmdev->radio_dev = gradio_dev;

	/* Register to v4l2 ctrl handler framework */
	fmdev->radio_dev->ctrl_handler = &fmdev->ctrl_handler;

	ret = v4l2_ctrl_handler_init(&fmdev->ctrl_handler, 5);
	if (ret < 0) {
		fmerr("(fmdev): Can't init ctrl handler\n");
		v4l2_ctrl_handler_free(&fmdev->ctrl_handler);
		return -EBUSY;
	}

	/*
	 * Following controls are handled by V4L2 control framework.
	 * Added in ascending ID order.
	 */
	v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
			V4L2_CID_AUDIO_VOLUME, FM_RX_VOLUME_MIN,
			FM_RX_VOLUME_MAX, 1, FM_RX_VOLUME_MAX);

	v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
			V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);

	v4l2_ctrl_new_std_menu(&fmdev->ctrl_handler, &fm_ctrl_ops,
			V4L2_CID_TUNE_PREEMPHASIS, V4L2_PREEMPHASIS_75_uS,
			0, V4L2_PREEMPHASIS_75_uS);

	v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
			V4L2_CID_TUNE_POWER_LEVEL, FM_PWR_LVL_LOW,
			FM_PWR_LVL_HIGH, 1, FM_PWR_LVL_HIGH);

	ctrl = v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
			V4L2_CID_TUNE_ANTENNA_CAPACITOR, 0,
			255, 1, 255);

	if (ctrl)
		ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;

	return 0;
}

void *fm_v4l2_deinit_video_device(void)
{
	struct fmdev *fmdev;


	fmdev = video_get_drvdata(gradio_dev);

	/* Unregister to v4l2 ctrl handler framework*/
	v4l2_ctrl_handler_free(&fmdev->ctrl_handler);

	/* Unregister RADIO device from V4L2 subsystem */
	video_unregister_device(gradio_dev);

	return fmdev;
}
Commit	Line	Data
7e388496 MH	1	/*
	2	* FM Driver for Connectivity chip of Texas Instruments.
	3	* This file provides interfaces to V4L2 subsystem.
	4	*
	5	* This module registers with V4L2 subsystem as Radio
	6	* data system interface (/dev/radio). During the registration,
	7	* it will expose two set of function pointers.
	8	*
	9	* 1) File operation related API (open, close, read, write, poll...etc).
	10	* 2) Set of V4L2 IOCTL complaint API.
	11	*
	12	* Copyright (C) 2011 Texas Instruments
	13	* Author: Raja Mani <raja_mani@ti.com>
	14	* Author: Manjunatha Halli <manjunatha_halli@ti.com>
	15	*
	16	* This program is free software; you can redistribute it and/or modify
	17	* it under the terms of the GNU General Public License version 2 as
	18	* published by the Free Software Foundation.
	19	*
	20	* This program is distributed in the hope that it will be useful,
	21	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	22	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	23	* GNU General Public License for more details.
	24	*
	25	* You should have received a copy of the GNU General Public License
	26	* along with this program; if not, write to the Free Software
	27	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	28	*
	29	*/
	30
35a24636 PG	31	#include <linux/export.h>
35a24636 PG	32
7e388496 MH	33	#include "fmdrv.h"
	34	#include "fmdrv_v4l2.h"
	35	#include "fmdrv_common.h"
	36	#include "fmdrv_rx.h"
	37	#include "fmdrv_tx.h"
	38
	39	static struct video_device *gradio_dev;
	40	static u8 radio_disconnected;
	41
	42	/* -- V4L2 RADIO (/dev/radioX) device file operation interfaces --- */
	43
	44	/* Read RX RDS data */
	45	static ssize_t fm_v4l2_fops_read(struct file file, char __user buf,
	46	size_t count, loff_t *ppos)
	47	{
	48	u8 rds_mode;
	49	int ret;
	50	struct fmdev *fmdev;
	51
	52	fmdev = video_drvdata(file);
	53
	54	if (!radio_disconnected) {
	55	fmerr("FM device is already disconnected\n");
	56	return -EIO;
	57	}
	58
	59	/* Turn on RDS mode , if it is disabled */
	60	ret = fm_rx_get_rds_mode(fmdev, &rds_mode);
	61	if (ret < 0) {
	62	fmerr("Unable to read current rds mode\n");
	63	return ret;
	64	}
	65
	66	if (rds_mode == FM_RDS_DISABLE) {
	67	ret = fmc_set_rds_mode(fmdev, FM_RDS_ENABLE);
	68	if (ret < 0) {
	69	fmerr("Failed to enable rds mode\n");
	70	return ret;
	71	}
	72	}
	73
	74	/* Copy RDS data from internal buffer to user buffer */
	75	return fmc_transfer_rds_from_internal_buff(fmdev, file, buf, count);
	76	}
	77
	78	/* Write TX RDS data */
	79	static ssize_t fm_v4l2_fops_write(struct file file, const char __user buf,
	80	size_t count, loff_t *ppos)
	81	{
	82	struct tx_rds rds;
	83	int ret;
	84	struct fmdev *fmdev;
	85
	86	ret = copy_from_user(&rds, buf, sizeof(rds));
75c1ca36	87	rds.text[sizeof(rds.text) - 1] = '\0';
7e388496 MH	88	fmdbg("(%d)type: %d, text %s, af %d\n",
7e388496 MH	89	ret, rds.text_type, rds.text, rds.af_freq);
eb70ac1b HV	90	if (ret)
eb70ac1b HV	91	return -EFAULT;
7e388496 MH	92
	93	fmdev = video_drvdata(file);
	94	fm_tx_set_radio_text(fmdev, rds.text, rds.text_type);
	95	fm_tx_set_af(fmdev, rds.af_freq);
	96
eb70ac1b	97	return sizeof(rds);
7e388496 MH	98	}
	99
	100	static u32 fm_v4l2_fops_poll(struct file file, struct poll_table_struct pts)
	101	{
	102	int ret;
	103	struct fmdev *fmdev;
	104
	105	fmdev = video_drvdata(file);
	106	ret = fmc_is_rds_data_available(fmdev, file, pts);
	107	if (ret < 0)
	108	return POLLIN \| POLLRDNORM;
	109
	110	return 0;
	111	}
	112
	113	/*
	114	* Handle open request for "/dev/radioX" device.
	115	* Start with FM RX mode as default.
	116	*/
	117	static int fm_v4l2_fops_open(struct file *file)
	118	{
	119	int ret;
	120	struct fmdev *fmdev = NULL;
	121
	122	/* Don't allow multiple open */
	123	if (radio_disconnected) {
	124	fmerr("FM device is already opened\n");
	125	return -EBUSY;
	126	}
	127
	128	fmdev = video_drvdata(file);
	129
	130	ret = fmc_prepare(fmdev);
	131	if (ret < 0) {
	132	fmerr("Unable to prepare FM CORE\n");
	133	return ret;
	134	}
	135
	136	fmdbg("Load FM RX firmware..\n");
	137
	138	ret = fmc_set_mode(fmdev, FM_MODE_RX);
	139	if (ret < 0) {
	140	fmerr("Unable to load FM RX firmware\n");
	141	return ret;
	142	}
	143	radio_disconnected = 1;
	144
	145	return ret;
	146	}
	147
	148	static int fm_v4l2_fops_release(struct file *file)
	149	{
	150	int ret;
	151	struct fmdev *fmdev;
	152
	153	fmdev = video_drvdata(file);
	154	if (!radio_disconnected) {
	155	fmdbg("FM device is already closed\n");
	156	return 0;
	157	}
	158
	159	ret = fmc_set_mode(fmdev, FM_MODE_OFF);
	160	if (ret < 0) {
	161	fmerr("Unable to turn off the chip\n");
162	return ret;
163	}
164
165	ret = fmc_release(fmdev);
166	if (ret < 0) {
167	fmerr("FM CORE release failed\n");
168	return ret;
169	}
170	radio_disconnected = 0;
171
172	return ret;
173	}
174
175	/* V4L2 RADIO (/dev/radioX) device IOCTL interfaces */
176	static int fm_v4l2_vidioc_querycap(struct file file, void priv,
177	struct v4l2_capability *capability)
178	{
179	strlcpy(capability->driver, FM_DRV_NAME, sizeof(capability->driver));
180	strlcpy(capability->card, FM_DRV_CARD_SHORT_NAME,
181	sizeof(capability->card));
182	sprintf(capability->bus_info, "UART");
7e388496 MH	183	capability->capabilities = V4L2_CAP_HW_FREQ_SEEK \| V4L2_CAP_TUNER \|
	184	V4L2_CAP_RADIO \| V4L2_CAP_MODULATOR \|
	185	V4L2_CAP_AUDIO \| V4L2_CAP_READWRITE \|
	186	V4L2_CAP_RDS_CAPTURE;
	187
	188	return 0;
	189	}
	190
	191	static int fm_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
	192	{
	193	struct fmdev *fmdev = container_of(ctrl->handler,
	194	struct fmdev, ctrl_handler);
	195
	196	switch (ctrl->id) {
	197	case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
ddac5c10	198	ctrl->val = fm_tx_get_tune_cap_val(fmdev);
7e388496 MH	199	break;
	200	default:
	201	fmwarn("%s: Unknown IOCTL: %d\n", __func__, ctrl->id);
	202	break;
	203	}
	204
	205	return 0;
	206	}
	207
	208	static int fm_v4l2_s_ctrl(struct v4l2_ctrl *ctrl)
	209	{
	210	struct fmdev *fmdev = container_of(ctrl->handler,
	211	struct fmdev, ctrl_handler);
	212
	213	switch (ctrl->id) {
	214	case V4L2_CID_AUDIO_VOLUME: /* set volume */
	215	return fm_rx_set_volume(fmdev, (u16)ctrl->val);
	216
	217	case V4L2_CID_AUDIO_MUTE: /* set mute */
	218	return fmc_set_mute_mode(fmdev, (u8)ctrl->val);
	219
	220	case V4L2_CID_TUNE_POWER_LEVEL:
	221	/* set TX power level - ext control */
	222	return fm_tx_set_pwr_lvl(fmdev, (u8)ctrl->val);
	223
	224	case V4L2_CID_TUNE_PREEMPHASIS:
	225	return fm_tx_set_preemph_filter(fmdev, (u8) ctrl->val);
	226
	227	default:
	228	return -EINVAL;
	229	}
	230	}
	231
	232	static int fm_v4l2_vidioc_g_audio(struct file file, void priv,
	233	struct v4l2_audio *audio)
	234	{
	235	memset(audio, 0, sizeof(*audio));
	236	strcpy(audio->name, "Radio");
	237	audio->capability = V4L2_AUDCAP_STEREO;
	238
	239	return 0;
	240	}
	241
	242	static int fm_v4l2_vidioc_s_audio(struct file file, void priv,
	243	struct v4l2_audio *audio)
	244	{
	245	if (audio->index != 0)
	246	return -EINVAL;
	247
	248	return 0;
	249	}
	250
	251	/* Get tuner attributes. If current mode is NOT RX, return error */
	252	static int fm_v4l2_vidioc_g_tuner(struct file file, void priv,
	253	struct v4l2_tuner *tuner)
	254	{
	255	struct fmdev *fmdev = video_drvdata(file);
	256	u32 bottom_freq;
	257	u32 top_freq;
	258	u16 stereo_mono_mode;
	259	u16 rssilvl;
	260	int ret;
	261
	262	if (tuner->index != 0)
263	return -EINVAL;
264
265	if (fmdev->curr_fmmode != FM_MODE_RX)
266	return -EPERM;
267
268	ret = fm_rx_get_band_freq_range(fmdev, &bottom_freq, &top_freq);
269	if (ret != 0)
270	return ret;
271
272	ret = fm_rx_get_stereo_mono(fmdev, &stereo_mono_mode);
273	if (ret != 0)
274	return ret;
275
276	ret = fm_rx_get_rssi_level(fmdev, &rssilvl);
277	if (ret != 0)
278	return ret;
279
280	strcpy(tuner->name, "FM");
281	tuner->type = V4L2_TUNER_RADIO;
282	/* Store rangelow and rangehigh freq in unit of 62.5 Hz */
283	tuner->rangelow = bottom_freq * 16;
284	tuner->rangehigh = top_freq * 16;
285	tuner->rxsubchans = V4L2_TUNER_SUB_MONO \| V4L2_TUNER_SUB_STEREO \|
286	((fmdev->rx.rds.flag == FM_RDS_ENABLE) ? V4L2_TUNER_SUB_RDS : 0);
287	tuner->capability = V4L2_TUNER_CAP_STEREO \| V4L2_TUNER_CAP_RDS \|
288	V4L2_TUNER_CAP_LOW;
289	tuner->audmode = (stereo_mono_mode ?
290	V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO);
291
292	/*
293	* Actual rssi value lies in between -128 to +127.
294	* Convert this range from 0 to 255 by adding +128
295	*/
296	rssilvl += 128;
297
298	/*
299	* Return signal strength value should be within 0 to 65535.
300	* Find out correct signal radio by multiplying (65535/255) = 257
301	*/
302	tuner->signal = rssilvl * 257;
303	tuner->afc = 0;
304
305	return ret;
306	}
307
308	/*
309	* Set tuner attributes. If current mode is NOT RX, set to RX.
310	* Currently, we set only audio mode (mono/stereo) and RDS state (on/off).
311	* Should we set other tuner attributes, too?
312	*/
313	static int fm_v4l2_vidioc_s_tuner(struct file file, void priv,
314	struct v4l2_tuner *tuner)
315	{
316	struct fmdev *fmdev = video_drvdata(file);
317	u16 aud_mode;
318	u8 rds_mode;
319	int ret;
320
321	if (tuner->index != 0)
322	return -EINVAL;
323
324	aud_mode = (tuner->audmode == V4L2_TUNER_MODE_STEREO) ?
325	FM_STEREO_MODE : FM_MONO_MODE;
326	rds_mode = (tuner->rxsubchans & V4L2_TUNER_SUB_RDS) ?
327	FM_RDS_ENABLE : FM_RDS_DISABLE;
328
329	if (fmdev->curr_fmmode != FM_MODE_RX) {
330	ret = fmc_set_mode(fmdev, FM_MODE_RX);
331	if (ret < 0) {
332	fmerr("Failed to set RX mode\n");
333	return ret;
334	}
335	}
336
337	ret = fmc_set_stereo_mono(fmdev, aud_mode);
338	if (ret < 0) {
339	fmerr("Failed to set RX stereo/mono mode\n");
340	return ret;
341	}
342
343	ret = fmc_set_rds_mode(fmdev, rds_mode);
344	if (ret < 0)
345	fmerr("Failed to set RX RDS mode\n");
346
347	return ret;
348	}
349
350	/* Get tuner or modulator radio frequency */
351	static int fm_v4l2_vidioc_g_freq(struct file file, void priv,
352	struct v4l2_frequency *freq)
353	{
354	struct fmdev *fmdev = video_drvdata(file);
355	int ret;
356
357	ret = fmc_get_freq(fmdev, &freq->frequency);
358	if (ret < 0) {
359	fmerr("Failed to get frequency\n");
360	return ret;
361	}
362
363	/* Frequency unit of 62.5 Hz*/
364	freq->frequency = (u32) freq->frequency * 16;
365
366	return 0;
367	}
368
369	/* Set tuner or modulator radio frequency */
370	static int fm_v4l2_vidioc_s_freq(struct file file, void priv,
371	struct v4l2_frequency *freq)
372	{
373	struct fmdev *fmdev = video_drvdata(file);
374
375	/*
376	* As V4L2_TUNER_CAP_LOW is set 1 user sends the frequency
377	* in units of 62.5 Hz.
378	*/
379	freq->frequency = (u32)(freq->frequency / 16);
380
381	return fmc_set_freq(fmdev, freq->frequency);
382	}
383
384	/* Set hardware frequency seek. If current mode is NOT RX, set it RX. */
385	static int fm_v4l2_vidioc_s_hw_freq_seek(struct file file, void priv,
386	struct v4l2_hw_freq_seek *seek)
387	{
388	struct fmdev *fmdev = video_drvdata(file);
389	int ret;
390
391	if (fmdev->curr_fmmode != FM_MODE_RX) {
392	ret = fmc_set_mode(fmdev, FM_MODE_RX);
393	if (ret != 0) {
394	fmerr("Failed to set RX mode\n");
395	return ret;
396	}
397	}
398
399	ret = fm_rx_seek(fmdev, seek->seek_upward, seek->wrap_around,
400	seek->spacing);
401	if (ret < 0)
402	fmerr("RX seek failed - %d\n", ret);
403
404	return ret;
405	}
406	/* Get modulator attributes. If mode is not TX, return no attributes. */
407	static int fm_v4l2_vidioc_g_modulator(struct file file, void priv,
408	struct v4l2_modulator *mod)
409	{
69932487	410	struct fmdev *fmdev = video_drvdata(file);
7e388496 MH	411
	412	if (mod->index != 0)
	413	return -EINVAL;
	414
	415	if (fmdev->curr_fmmode != FM_MODE_TX)
	416	return -EPERM;
	417
	418	mod->txsubchans = ((fmdev->tx_data.aud_mode == FM_STEREO_MODE) ?
	419	V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO) \|
	420	((fmdev->tx_data.rds.flag == FM_RDS_ENABLE) ?
	421	V4L2_TUNER_SUB_RDS : 0);
	422
	423	mod->capability = V4L2_TUNER_CAP_STEREO \| V4L2_TUNER_CAP_RDS \|
	424	V4L2_TUNER_CAP_LOW;
	425
	426	return 0;
	427	}
	428
	429	/* Set modulator attributes. If mode is not TX, set to TX. */
	430	static int fm_v4l2_vidioc_s_modulator(struct file file, void priv,
	431	struct v4l2_modulator *mod)
	432	{
	433	struct fmdev *fmdev = video_drvdata(file);
	434	u8 rds_mode;
	435	u16 aud_mode;
	436	int ret;
	437
	438	if (mod->index != 0)
	439	return -EINVAL;
	440
	441	if (fmdev->curr_fmmode != FM_MODE_TX) {
	442	ret = fmc_set_mode(fmdev, FM_MODE_TX);
	443	if (ret != 0) {
	444	fmerr("Failed to set TX mode\n");
	445	return ret;
	446	}
	447	}
	448
	449	aud_mode = (mod->txsubchans & V4L2_TUNER_SUB_STEREO) ?
	450	FM_STEREO_MODE : FM_MONO_MODE;
	451	rds_mode = (mod->txsubchans & V4L2_TUNER_SUB_RDS) ?
	452	FM_RDS_ENABLE : FM_RDS_DISABLE;
	453	ret = fm_tx_set_stereo_mono(fmdev, aud_mode);
	454	if (ret < 0) {
	455	fmerr("Failed to set mono/stereo mode for TX\n");
	456	return ret;
	457	}
	458	ret = fm_tx_set_rds_mode(fmdev, rds_mode);
	459	if (ret < 0)
	460	fmerr("Failed to set rds mode for TX\n");
	461
	462	return ret;
	463	}
	464
	465	static const struct v4l2_file_operations fm_drv_fops = {
	466	.owner = THIS_MODULE,
	467	.read = fm_v4l2_fops_read,
	468	.write = fm_v4l2_fops_write,
	469	.poll = fm_v4l2_fops_poll,
	470	.unlocked_ioctl = video_ioctl2,
	471	.open = fm_v4l2_fops_open,
	472	.release = fm_v4l2_fops_release,
	473	};
	474
475	static const struct v4l2_ctrl_ops fm_ctrl_ops = {
476	.s_ctrl = fm_v4l2_s_ctrl,
477	.g_volatile_ctrl = fm_g_volatile_ctrl,
478	};
479	static const struct v4l2_ioctl_ops fm_drv_ioctl_ops = {
480	.vidioc_querycap = fm_v4l2_vidioc_querycap,
481	.vidioc_g_audio = fm_v4l2_vidioc_g_audio,
482	.vidioc_s_audio = fm_v4l2_vidioc_s_audio,
483	.vidioc_g_tuner = fm_v4l2_vidioc_g_tuner,
484	.vidioc_s_tuner = fm_v4l2_vidioc_s_tuner,
485	.vidioc_g_frequency = fm_v4l2_vidioc_g_freq,
486	.vidioc_s_frequency = fm_v4l2_vidioc_s_freq,
487	.vidioc_s_hw_freq_seek = fm_v4l2_vidioc_s_hw_freq_seek,
488	.vidioc_g_modulator = fm_v4l2_vidioc_g_modulator,
489	.vidioc_s_modulator = fm_v4l2_vidioc_s_modulator
490	};
491
492	/* V4L2 RADIO device parent structure */
493	static struct video_device fm_viddev_template = {
494	.fops = &fm_drv_fops,
495	.ioctl_ops = &fm_drv_ioctl_ops,
496	.name = FM_DRV_NAME,
497	.release = video_device_release,
498	};
499
500	int fm_v4l2_init_video_device(struct fmdev *fmdev, int radio_nr)
501	{
502	struct v4l2_ctrl *ctrl;
503	int ret;
504
505	/* Init mutex for core locking */
506	mutex_init(&fmdev->mutex);
507
508	/* Allocate new video device */
509	gradio_dev = video_device_alloc();
510	if (NULL == gradio_dev) {
511	fmerr("Can't allocate video device\n");
512	return -ENOMEM;
513	}
514
515	/* Setup FM driver's V4L2 properties */
516	memcpy(gradio_dev, &fm_viddev_template, sizeof(fm_viddev_template));
517
518	video_set_drvdata(gradio_dev, fmdev);
519
520	gradio_dev->lock = &fmdev->mutex;
521
522	/* Register with V4L2 subsystem as RADIO device */
523	if (video_register_device(gradio_dev, VFL_TYPE_RADIO, radio_nr)) {
524	video_device_release(gradio_dev);
525	fmerr("Could not register video device\n");
526	return -ENOMEM;
527	}
528
529	fmdev->radio_dev = gradio_dev;
530
531	/* Register to v4l2 ctrl handler framework */
532	fmdev->radio_dev->ctrl_handler = &fmdev->ctrl_handler;
533
534	ret = v4l2_ctrl_handler_init(&fmdev->ctrl_handler, 5);
535	if (ret < 0) {
536	fmerr("(fmdev): Can't init ctrl handler\n");
537	v4l2_ctrl_handler_free(&fmdev->ctrl_handler);
538	return -EBUSY;
539	}
540
541	/*
542	* Following controls are handled by V4L2 control framework.
543	* Added in ascending ID order.
544	*/
545	v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
546	V4L2_CID_AUDIO_VOLUME, FM_RX_VOLUME_MIN,
547	FM_RX_VOLUME_MAX, 1, FM_RX_VOLUME_MAX);
548
549	v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
550	V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
551
552	v4l2_ctrl_new_std_menu(&fmdev->ctrl_handler, &fm_ctrl_ops,
553	V4L2_CID_TUNE_PREEMPHASIS, V4L2_PREEMPHASIS_75_uS,
554	0, V4L2_PREEMPHASIS_75_uS);
555
556	v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
557	V4L2_CID_TUNE_POWER_LEVEL, FM_PWR_LVL_LOW,
558	FM_PWR_LVL_HIGH, 1, FM_PWR_LVL_HIGH);
559
560	ctrl = v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
561	V4L2_CID_TUNE_ANTENNA_CAPACITOR, 0,
562	255, 1, 255);
563
564	if (ctrl)
88365105	565	ctrl->flags \|= V4L2_CTRL_FLAG_VOLATILE;
7e388496 MH	566
	567	return 0;
	568	}
	569
	570	void *fm_v4l2_deinit_video_device(void)
	571	{
	572	struct fmdev *fmdev;
	573
	574
	575	fmdev = video_get_drvdata(gradio_dev);
	576
	577	/* Unregister to v4l2 ctrl handler framework*/
	578	v4l2_ctrl_handler_free(&fmdev->ctrl_handler);
	579
	580	/* Unregister RADIO device from V4L2 subsystem */
	581	video_unregister_device(gradio_dev);
	582
	583	return fmdev;
	584	}