radio-timb.c (4793B)
1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * radio-timb.c Timberdale FPGA Radio driver 4 * Copyright (c) 2009 Intel Corporation 5 */ 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 int 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 return 0; 161} 162 163static struct platform_driver timbradio_platform_driver = { 164 .driver = { 165 .name = DRIVER_NAME, 166 }, 167 .probe = timbradio_probe, 168 .remove = timbradio_remove, 169}; 170 171module_platform_driver(timbradio_platform_driver); 172 173MODULE_DESCRIPTION("Timberdale Radio driver"); 174MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>"); 175MODULE_LICENSE("GPL v2"); 176MODULE_VERSION("0.0.2"); 177MODULE_ALIAS("platform:"DRIVER_NAME);