359 строки
10 KiB
C
359 строки
10 KiB
C
/*
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* drivers/media/radio/radio-si4713.c
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*
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* Platform Driver for Silicon Labs Si4713 FM Radio Transmitter:
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*
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* Copyright (c) 2008 Instituto Nokia de Tecnologia - INdT
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* Contact: Eduardo Valentin <eduardo.valentin@nokia.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/i2c.h>
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#include <linux/videodev2.h>
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#include <linux/slab.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-ioctl.h>
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#include <media/radio-si4713.h>
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/* module parameters */
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static int radio_nr = -1; /* radio device minor (-1 ==> auto assign) */
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module_param(radio_nr, int, 0);
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MODULE_PARM_DESC(radio_nr,
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"Minor number for radio device (-1 ==> auto assign)");
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Eduardo Valentin <eduardo.valentin@nokia.com>");
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MODULE_DESCRIPTION("Platform driver for Si4713 FM Radio Transmitter");
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MODULE_VERSION("0.0.1");
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/* Driver state struct */
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struct radio_si4713_device {
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struct v4l2_device v4l2_dev;
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struct video_device *radio_dev;
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};
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/* radio_si4713_fops - file operations interface */
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static const struct v4l2_file_operations radio_si4713_fops = {
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.owner = THIS_MODULE,
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/* Note: locking is done at the subdev level in the i2c driver. */
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.unlocked_ioctl = video_ioctl2,
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};
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/* Video4Linux Interface */
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static int radio_si4713_fill_audout(struct v4l2_audioout *vao)
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{
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/* TODO: check presence of audio output */
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strlcpy(vao->name, "FM Modulator Audio Out", 32);
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return 0;
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}
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static int radio_si4713_enumaudout(struct file *file, void *priv,
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struct v4l2_audioout *vao)
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{
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return radio_si4713_fill_audout(vao);
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}
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static int radio_si4713_g_audout(struct file *file, void *priv,
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struct v4l2_audioout *vao)
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{
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int rval = radio_si4713_fill_audout(vao);
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vao->index = 0;
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return rval;
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}
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static int radio_si4713_s_audout(struct file *file, void *priv,
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struct v4l2_audioout *vao)
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{
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return vao->index ? -EINVAL : 0;
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}
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/* radio_si4713_querycap - query device capabilities */
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static int radio_si4713_querycap(struct file *file, void *priv,
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struct v4l2_capability *capability)
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{
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strlcpy(capability->driver, "radio-si4713", sizeof(capability->driver));
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strlcpy(capability->card, "Silicon Labs Si4713 Modulator",
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sizeof(capability->card));
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capability->capabilities = V4L2_CAP_MODULATOR | V4L2_CAP_RDS_OUTPUT;
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return 0;
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}
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/* radio_si4713_queryctrl - enumerate control items */
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static int radio_si4713_queryctrl(struct file *file, void *priv,
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struct v4l2_queryctrl *qc)
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{
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/* Must be sorted from low to high control ID! */
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static const u32 user_ctrls[] = {
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V4L2_CID_USER_CLASS,
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V4L2_CID_AUDIO_MUTE,
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0
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};
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/* Must be sorted from low to high control ID! */
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static const u32 fmtx_ctrls[] = {
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V4L2_CID_FM_TX_CLASS,
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V4L2_CID_RDS_TX_DEVIATION,
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V4L2_CID_RDS_TX_PI,
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V4L2_CID_RDS_TX_PTY,
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V4L2_CID_RDS_TX_PS_NAME,
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V4L2_CID_RDS_TX_RADIO_TEXT,
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V4L2_CID_AUDIO_LIMITER_ENABLED,
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V4L2_CID_AUDIO_LIMITER_RELEASE_TIME,
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V4L2_CID_AUDIO_LIMITER_DEVIATION,
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V4L2_CID_AUDIO_COMPRESSION_ENABLED,
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V4L2_CID_AUDIO_COMPRESSION_GAIN,
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V4L2_CID_AUDIO_COMPRESSION_THRESHOLD,
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V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME,
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V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME,
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V4L2_CID_PILOT_TONE_ENABLED,
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V4L2_CID_PILOT_TONE_DEVIATION,
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V4L2_CID_PILOT_TONE_FREQUENCY,
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V4L2_CID_TUNE_PREEMPHASIS,
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V4L2_CID_TUNE_POWER_LEVEL,
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V4L2_CID_TUNE_ANTENNA_CAPACITOR,
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0
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};
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static const u32 *ctrl_classes[] = {
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user_ctrls,
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fmtx_ctrls,
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NULL
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};
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struct radio_si4713_device *rsdev;
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rsdev = video_get_drvdata(video_devdata(file));
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qc->id = v4l2_ctrl_next(ctrl_classes, qc->id);
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if (qc->id == 0)
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return -EINVAL;
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if (qc->id == V4L2_CID_USER_CLASS || qc->id == V4L2_CID_FM_TX_CLASS)
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return v4l2_ctrl_query_fill(qc, 0, 0, 0, 0);
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return v4l2_device_call_until_err(&rsdev->v4l2_dev, 0, core,
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queryctrl, qc);
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}
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/*
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* v4l2 ioctl call backs.
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* we are just a wrapper for v4l2_sub_devs.
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*/
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static inline struct v4l2_device *get_v4l2_dev(struct file *file)
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{
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return &((struct radio_si4713_device *)video_drvdata(file))->v4l2_dev;
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}
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static int radio_si4713_g_ext_ctrls(struct file *file, void *p,
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struct v4l2_ext_controls *vecs)
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{
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return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core,
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g_ext_ctrls, vecs);
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}
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static int radio_si4713_s_ext_ctrls(struct file *file, void *p,
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struct v4l2_ext_controls *vecs)
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{
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return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core,
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s_ext_ctrls, vecs);
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}
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static int radio_si4713_g_ctrl(struct file *file, void *p,
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struct v4l2_control *vc)
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{
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return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core,
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g_ctrl, vc);
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}
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static int radio_si4713_s_ctrl(struct file *file, void *p,
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struct v4l2_control *vc)
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{
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return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core,
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s_ctrl, vc);
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}
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static int radio_si4713_g_modulator(struct file *file, void *p,
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struct v4l2_modulator *vm)
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{
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return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner,
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g_modulator, vm);
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}
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static int radio_si4713_s_modulator(struct file *file, void *p,
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struct v4l2_modulator *vm)
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{
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return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner,
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s_modulator, vm);
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}
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static int radio_si4713_g_frequency(struct file *file, void *p,
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struct v4l2_frequency *vf)
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{
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return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner,
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g_frequency, vf);
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}
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static int radio_si4713_s_frequency(struct file *file, void *p,
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struct v4l2_frequency *vf)
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{
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return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner,
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s_frequency, vf);
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}
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static long radio_si4713_default(struct file *file, void *p,
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bool valid_prio, int cmd, void *arg)
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{
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return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core,
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ioctl, cmd, arg);
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}
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static struct v4l2_ioctl_ops radio_si4713_ioctl_ops = {
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.vidioc_enumaudout = radio_si4713_enumaudout,
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.vidioc_g_audout = radio_si4713_g_audout,
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.vidioc_s_audout = radio_si4713_s_audout,
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.vidioc_querycap = radio_si4713_querycap,
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.vidioc_queryctrl = radio_si4713_queryctrl,
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.vidioc_g_ext_ctrls = radio_si4713_g_ext_ctrls,
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.vidioc_s_ext_ctrls = radio_si4713_s_ext_ctrls,
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.vidioc_g_ctrl = radio_si4713_g_ctrl,
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.vidioc_s_ctrl = radio_si4713_s_ctrl,
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.vidioc_g_modulator = radio_si4713_g_modulator,
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.vidioc_s_modulator = radio_si4713_s_modulator,
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.vidioc_g_frequency = radio_si4713_g_frequency,
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.vidioc_s_frequency = radio_si4713_s_frequency,
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.vidioc_default = radio_si4713_default,
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};
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/* radio_si4713_vdev_template - video device interface */
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static struct video_device radio_si4713_vdev_template = {
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.fops = &radio_si4713_fops,
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.name = "radio-si4713",
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.release = video_device_release,
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.ioctl_ops = &radio_si4713_ioctl_ops,
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};
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/* Platform driver interface */
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/* radio_si4713_pdriver_probe - probe for the device */
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static int radio_si4713_pdriver_probe(struct platform_device *pdev)
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{
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struct radio_si4713_platform_data *pdata = pdev->dev.platform_data;
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struct radio_si4713_device *rsdev;
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struct i2c_adapter *adapter;
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struct v4l2_subdev *sd;
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int rval = 0;
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if (!pdata) {
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dev_err(&pdev->dev, "Cannot proceed without platform data.\n");
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rval = -EINVAL;
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goto exit;
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}
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rsdev = kzalloc(sizeof *rsdev, GFP_KERNEL);
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if (!rsdev) {
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dev_err(&pdev->dev, "Failed to alloc video device.\n");
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rval = -ENOMEM;
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goto exit;
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}
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rval = v4l2_device_register(&pdev->dev, &rsdev->v4l2_dev);
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if (rval) {
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dev_err(&pdev->dev, "Failed to register v4l2 device.\n");
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goto free_rsdev;
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}
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adapter = i2c_get_adapter(pdata->i2c_bus);
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if (!adapter) {
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dev_err(&pdev->dev, "Cannot get i2c adapter %d\n",
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pdata->i2c_bus);
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rval = -ENODEV;
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goto unregister_v4l2_dev;
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}
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sd = v4l2_i2c_new_subdev_board(&rsdev->v4l2_dev, adapter,
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pdata->subdev_board_info, NULL);
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if (!sd) {
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dev_err(&pdev->dev, "Cannot get v4l2 subdevice\n");
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rval = -ENODEV;
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goto put_adapter;
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}
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rsdev->radio_dev = video_device_alloc();
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if (!rsdev->radio_dev) {
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dev_err(&pdev->dev, "Failed to alloc video device.\n");
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rval = -ENOMEM;
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goto put_adapter;
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}
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memcpy(rsdev->radio_dev, &radio_si4713_vdev_template,
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sizeof(radio_si4713_vdev_template));
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video_set_drvdata(rsdev->radio_dev, rsdev);
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if (video_register_device(rsdev->radio_dev, VFL_TYPE_RADIO, radio_nr)) {
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dev_err(&pdev->dev, "Could not register video device.\n");
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rval = -EIO;
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goto free_vdev;
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}
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dev_info(&pdev->dev, "New device successfully probed\n");
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goto exit;
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free_vdev:
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video_device_release(rsdev->radio_dev);
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put_adapter:
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i2c_put_adapter(adapter);
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unregister_v4l2_dev:
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v4l2_device_unregister(&rsdev->v4l2_dev);
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free_rsdev:
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kfree(rsdev);
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exit:
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return rval;
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}
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/* radio_si4713_pdriver_remove - remove the device */
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static int __exit radio_si4713_pdriver_remove(struct platform_device *pdev)
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{
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struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
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struct radio_si4713_device *rsdev = container_of(v4l2_dev,
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struct radio_si4713_device,
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v4l2_dev);
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struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
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struct v4l2_subdev, list);
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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video_unregister_device(rsdev->radio_dev);
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i2c_put_adapter(client->adapter);
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v4l2_device_unregister(&rsdev->v4l2_dev);
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kfree(rsdev);
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return 0;
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}
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static struct platform_driver radio_si4713_pdriver = {
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.driver = {
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.name = "radio-si4713",
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},
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.probe = radio_si4713_pdriver_probe,
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.remove = __exit_p(radio_si4713_pdriver_remove),
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};
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module_platform_driver(radio_si4713_pdriver);
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