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 v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO; 38 v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS; 39 return 0; 40 } 41 42 static int timbradio_vidioc_g_tuner(struct file *file, void *priv, 43 struct v4l2_tuner *v) 44 { 45 struct timbradio *tr = video_drvdata(file); 46 return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v); 47 } 48 49 static int timbradio_vidioc_s_tuner(struct file *file, void *priv, 50 const struct v4l2_tuner *v) 51 { 52 struct timbradio *tr = video_drvdata(file); 53 return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v); 54 } 55 56 static int timbradio_vidioc_s_frequency(struct file *file, void *priv, 57 const struct v4l2_frequency *f) 58 { 59 struct timbradio *tr = video_drvdata(file); 60 return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f); 61 } 62 63 static int timbradio_vidioc_g_frequency(struct file *file, void *priv, 64 struct v4l2_frequency *f) 65 { 66 struct timbradio *tr = video_drvdata(file); 67 return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f); 68 } 69 70 static const struct v4l2_ioctl_ops timbradio_ioctl_ops = { 71 .vidioc_querycap = timbradio_vidioc_querycap, 72 .vidioc_g_tuner = timbradio_vidioc_g_tuner, 73 .vidioc_s_tuner = timbradio_vidioc_s_tuner, 74 .vidioc_g_frequency = timbradio_vidioc_g_frequency, 75 .vidioc_s_frequency = timbradio_vidioc_s_frequency, 76 .vidioc_log_status = v4l2_ctrl_log_status, 77 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 78 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 79 }; 80 81 static const struct v4l2_file_operations timbradio_fops = { 82 .owner = THIS_MODULE, 83 .open = v4l2_fh_open, 84 .release = v4l2_fh_release, 85 .poll = v4l2_ctrl_poll, 86 .unlocked_ioctl = video_ioctl2, 87 }; 88 89 static int timbradio_probe(struct platform_device *pdev) 90 { 91 struct timb_radio_platform_data *pdata = pdev->dev.platform_data; 92 struct timbradio *tr; 93 int err; 94 95 if (!pdata) { 96 dev_err(&pdev->dev, "Platform data missing\n"); 97 err = -EINVAL; 98 goto err; 99 } 100 101 tr = devm_kzalloc(&pdev->dev, sizeof(*tr), GFP_KERNEL); 102 if (!tr) { 103 err = -ENOMEM; 104 goto err; 105 } 106 107 tr->pdata = *pdata; 108 mutex_init(&tr->lock); 109 110 strscpy(tr->video_dev.name, "Timberdale Radio", 111 sizeof(tr->video_dev.name)); 112 tr->video_dev.fops = &timbradio_fops; 113 tr->video_dev.ioctl_ops = &timbradio_ioctl_ops; 114 tr->video_dev.release = video_device_release_empty; 115 tr->video_dev.minor = -1; 116 tr->video_dev.lock = &tr->lock; 117 118 strscpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name)); 119 err = v4l2_device_register(NULL, &tr->v4l2_dev); 120 if (err) 121 goto err; 122 123 tr->video_dev.v4l2_dev = &tr->v4l2_dev; 124 125 tr->sd_tuner = v4l2_i2c_new_subdev_board(&tr->v4l2_dev, 126 i2c_get_adapter(pdata->i2c_adapter), pdata->tuner, NULL); 127 tr->sd_dsp = v4l2_i2c_new_subdev_board(&tr->v4l2_dev, 128 i2c_get_adapter(pdata->i2c_adapter), pdata->dsp, NULL); 129 if (tr->sd_tuner == NULL || tr->sd_dsp == NULL) { 130 err = -ENODEV; 131 goto err_video_req; 132 } 133 134 tr->v4l2_dev.ctrl_handler = tr->sd_dsp->ctrl_handler; 135 136 err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1); 137 if (err) { 138 dev_err(&pdev->dev, "Error reg video\n"); 139 goto err_video_req; 140 } 141 142 video_set_drvdata(&tr->video_dev, tr); 143 144 platform_set_drvdata(pdev, tr); 145 return 0; 146 147 err_video_req: 148 v4l2_device_unregister(&tr->v4l2_dev); 149 err: 150 dev_err(&pdev->dev, "Failed to register: %d\n", err); 151 152 return err; 153 } 154 155 static int timbradio_remove(struct platform_device *pdev) 156 { 157 struct timbradio *tr = platform_get_drvdata(pdev); 158 159 video_unregister_device(&tr->video_dev); 160 v4l2_device_unregister(&tr->v4l2_dev); 161 return 0; 162 } 163 164 static struct platform_driver timbradio_platform_driver = { 165 .driver = { 166 .name = DRIVER_NAME, 167 }, 168 .probe = timbradio_probe, 169 .remove = timbradio_remove, 170 }; 171 172 module_platform_driver(timbradio_platform_driver); 173 174 MODULE_DESCRIPTION("Timberdale Radio driver"); 175 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>"); 176 MODULE_LICENSE("GPL v2"); 177 MODULE_VERSION("0.0.2"); 178 MODULE_ALIAS("platform:"DRIVER_NAME); 179