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 21 struct 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 31 static 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 40 static 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 47 static 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 54 static 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 61 static 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 68 static 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 79 static 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 87 static 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; 145 146 err_video_req: 147 v4l2_device_unregister(&tr->v4l2_dev); 148 err: 149 dev_err(&pdev->dev, "Failed to register: %d\n", err); 150 151 return err; 152 } 153 154 static 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 } 161 162 static struct platform_driver timbradio_platform_driver = { 163 .driver = { 164 .name = DRIVER_NAME, 165 }, 166 .probe = timbradio_probe, 167 .remove = timbradio_remove, 168 }; 169 170 module_platform_driver(timbradio_platform_driver); 171 172 MODULE_DESCRIPTION("Timberdale Radio driver"); 173 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>"); 174 MODULE_LICENSE("GPL v2"); 175 MODULE_VERSION("0.0.2"); 176 MODULE_ALIAS("platform:"DRIVER_NAME); 177