177 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * radio-timb.c Timberdale FPGA Radio driver4 * Copyright (c) 2009 Intel Corporation5 */6 7#include <linux/io.h>8#include <media/v4l2-ioctl.h>9#include <media/v4l2-device.h>10#include <media/v4l2-ctrls.h>11#include <media/v4l2-event.h>12#include <linux/platform_device.h>13#include <linux/interrupt.h>14#include <linux/slab.h>15#include <linux/i2c.h>16#include <linux/module.h>17#include <linux/platform_data/media/timb_radio.h>18 19#define DRIVER_NAME "timb-radio"20 21struct timbradio {22 struct timb_radio_platform_data pdata;23 struct v4l2_subdev *sd_tuner;24 struct v4l2_subdev *sd_dsp;25 struct video_device video_dev;26 struct v4l2_device v4l2_dev;27 struct mutex lock;28};29 30 31static int timbradio_vidioc_querycap(struct file *file, void *priv,32 struct v4l2_capability *v)33{34 strscpy(v->driver, DRIVER_NAME, sizeof(v->driver));35 strscpy(v->card, "Timberdale Radio", sizeof(v->card));36 snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME);37 return 0;38}39 40static int timbradio_vidioc_g_tuner(struct file *file, void *priv,41 struct v4l2_tuner *v)42{43 struct timbradio *tr = video_drvdata(file);44 return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v);45}46 47static int timbradio_vidioc_s_tuner(struct file *file, void *priv,48 const struct v4l2_tuner *v)49{50 struct timbradio *tr = video_drvdata(file);51 return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v);52}53 54static int timbradio_vidioc_s_frequency(struct file *file, void *priv,55 const struct v4l2_frequency *f)56{57 struct timbradio *tr = video_drvdata(file);58 return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f);59}60 61static int timbradio_vidioc_g_frequency(struct file *file, void *priv,62 struct v4l2_frequency *f)63{64 struct timbradio *tr = video_drvdata(file);65 return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f);66}67 68static const struct v4l2_ioctl_ops timbradio_ioctl_ops = {69 .vidioc_querycap = timbradio_vidioc_querycap,70 .vidioc_g_tuner = timbradio_vidioc_g_tuner,71 .vidioc_s_tuner = timbradio_vidioc_s_tuner,72 .vidioc_g_frequency = timbradio_vidioc_g_frequency,73 .vidioc_s_frequency = timbradio_vidioc_s_frequency,74 .vidioc_log_status = v4l2_ctrl_log_status,75 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,76 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,77};78 79static const struct v4l2_file_operations timbradio_fops = {80 .owner = THIS_MODULE,81 .open = v4l2_fh_open,82 .release = v4l2_fh_release,83 .poll = v4l2_ctrl_poll,84 .unlocked_ioctl = video_ioctl2,85};86 87static int timbradio_probe(struct platform_device *pdev)88{89 struct timb_radio_platform_data *pdata = pdev->dev.platform_data;90 struct timbradio *tr;91 int err;92 93 if (!pdata) {94 dev_err(&pdev->dev, "Platform data missing\n");95 err = -EINVAL;96 goto err;97 }98 99 tr = devm_kzalloc(&pdev->dev, sizeof(*tr), GFP_KERNEL);100 if (!tr) {101 err = -ENOMEM;102 goto err;103 }104 105 tr->pdata = *pdata;106 mutex_init(&tr->lock);107 108 strscpy(tr->video_dev.name, "Timberdale Radio",109 sizeof(tr->video_dev.name));110 tr->video_dev.fops = &timbradio_fops;111 tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;112 tr->video_dev.release = video_device_release_empty;113 tr->video_dev.minor = -1;114 tr->video_dev.lock = &tr->lock;115 tr->video_dev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;116 117 strscpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));118 err = v4l2_device_register(NULL, &tr->v4l2_dev);119 if (err)120 goto err;121 122 tr->video_dev.v4l2_dev = &tr->v4l2_dev;123 124 tr->sd_tuner = v4l2_i2c_new_subdev_board(&tr->v4l2_dev,125 i2c_get_adapter(pdata->i2c_adapter), pdata->tuner, NULL);126 tr->sd_dsp = v4l2_i2c_new_subdev_board(&tr->v4l2_dev,127 i2c_get_adapter(pdata->i2c_adapter), pdata->dsp, NULL);128 if (tr->sd_tuner == NULL || tr->sd_dsp == NULL) {129 err = -ENODEV;130 goto err_video_req;131 }132 133 tr->v4l2_dev.ctrl_handler = tr->sd_dsp->ctrl_handler;134 135 err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);136 if (err) {137 dev_err(&pdev->dev, "Error reg video\n");138 goto err_video_req;139 }140 141 video_set_drvdata(&tr->video_dev, tr);142 143 platform_set_drvdata(pdev, tr);144 return 0;145 146err_video_req:147 v4l2_device_unregister(&tr->v4l2_dev);148err:149 dev_err(&pdev->dev, "Failed to register: %d\n", err);150 151 return err;152}153 154static void timbradio_remove(struct platform_device *pdev)155{156 struct timbradio *tr = platform_get_drvdata(pdev);157 158 video_unregister_device(&tr->video_dev);159 v4l2_device_unregister(&tr->v4l2_dev);160}161 162static struct platform_driver timbradio_platform_driver = {163 .driver = {164 .name = DRIVER_NAME,165 },166 .probe = timbradio_probe,167 .remove_new = timbradio_remove,168};169 170module_platform_driver(timbradio_platform_driver);171 172MODULE_DESCRIPTION("Timberdale Radio driver");173MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");174MODULE_LICENSE("GPL v2");175MODULE_VERSION("0.0.2");176MODULE_ALIAS("platform:"DRIVER_NAME);177