diff options
Diffstat (limited to 'drivers/media/radio/radio-timb.c')
| -rw-r--r-- | drivers/media/radio/radio-timb.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-timb.c b/drivers/media/radio/radio-timb.c new file mode 100644 index 000000000..948ee3eec --- /dev/null +++ b/drivers/media/radio/radio-timb.c @@ -0,0 +1,177 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * radio-timb.c Timberdale FPGA Radio driver + * Copyright (c) 2009 Intel Corporation + */ + +#include <linux/io.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-event.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/platform_data/media/timb_radio.h> + +#define DRIVER_NAME "timb-radio" + +struct timbradio { + struct timb_radio_platform_data pdata; + struct v4l2_subdev *sd_tuner; + struct v4l2_subdev *sd_dsp; + struct video_device video_dev; + struct v4l2_device v4l2_dev; + struct mutex lock; +}; + + +static int timbradio_vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *v) +{ + strscpy(v->driver, DRIVER_NAME, sizeof(v->driver)); + strscpy(v->card, "Timberdale Radio", sizeof(v->card)); + snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME); + return 0; +} + +static int timbradio_vidioc_g_tuner(struct file *file, void *priv, + struct v4l2_tuner *v) +{ + struct timbradio *tr = video_drvdata(file); + return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v); +} + +static int timbradio_vidioc_s_tuner(struct file *file, void *priv, + const struct v4l2_tuner *v) +{ + struct timbradio *tr = video_drvdata(file); + return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v); +} + +static int timbradio_vidioc_s_frequency(struct file *file, void *priv, + const struct v4l2_frequency *f) +{ + struct timbradio *tr = video_drvdata(file); + return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f); +} + +static int timbradio_vidioc_g_frequency(struct file *file, void *priv, + struct v4l2_frequency *f) +{ + struct timbradio *tr = video_drvdata(file); + return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f); +} + +static const struct v4l2_ioctl_ops timbradio_ioctl_ops = { + .vidioc_querycap = timbradio_vidioc_querycap, + .vidioc_g_tuner = timbradio_vidioc_g_tuner, + .vidioc_s_tuner = timbradio_vidioc_s_tuner, + .vidioc_g_frequency = timbradio_vidioc_g_frequency, + .vidioc_s_frequency = timbradio_vidioc_s_frequency, + .vidioc_log_status = v4l2_ctrl_log_status, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +static const struct v4l2_file_operations timbradio_fops = { + .owner = THIS_MODULE, + .open = v4l2_fh_open, + .release = v4l2_fh_release, + .poll = v4l2_ctrl_poll, + .unlocked_ioctl = video_ioctl2, +}; + +static int timbradio_probe(struct platform_device *pdev) +{ + struct timb_radio_platform_data *pdata = pdev->dev.platform_data; + struct timbradio *tr; + int err; + + if (!pdata) { + dev_err(&pdev->dev, "Platform data missing\n"); + err = -EINVAL; + goto err; + } + + tr = devm_kzalloc(&pdev->dev, sizeof(*tr), GFP_KERNEL); + if (!tr) { + err = -ENOMEM; + goto err; + } + + tr->pdata = *pdata; + mutex_init(&tr->lock); + + strscpy(tr->video_dev.name, "Timberdale Radio", + sizeof(tr->video_dev.name)); + tr->video_dev.fops = &timbradio_fops; + tr->video_dev.ioctl_ops = &timbradio_ioctl_ops; + tr->video_dev.release = video_device_release_empty; + tr->video_dev.minor = -1; + tr->video_dev.lock = &tr->lock; + tr->video_dev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO; + + strscpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name)); + err = v4l2_device_register(NULL, &tr->v4l2_dev); + if (err) + goto err; + + tr->video_dev.v4l2_dev = &tr->v4l2_dev; + + tr->sd_tuner = v4l2_i2c_new_subdev_board(&tr->v4l2_dev, + i2c_get_adapter(pdata->i2c_adapter), pdata->tuner, NULL); + tr->sd_dsp = v4l2_i2c_new_subdev_board(&tr->v4l2_dev, + i2c_get_adapter(pdata->i2c_adapter), pdata->dsp, NULL); + if (tr->sd_tuner == NULL || tr->sd_dsp == NULL) { + err = -ENODEV; + goto err_video_req; + } + + tr->v4l2_dev.ctrl_handler = tr->sd_dsp->ctrl_handler; + + err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1); + if (err) { + dev_err(&pdev->dev, "Error reg video\n"); + goto err_video_req; + } + + video_set_drvdata(&tr->video_dev, tr); + + platform_set_drvdata(pdev, tr); + return 0; + +err_video_req: + v4l2_device_unregister(&tr->v4l2_dev); +err: + dev_err(&pdev->dev, "Failed to register: %d\n", err); + + return err; +} + +static int timbradio_remove(struct platform_device *pdev) +{ + struct timbradio *tr = platform_get_drvdata(pdev); + + video_unregister_device(&tr->video_dev); + v4l2_device_unregister(&tr->v4l2_dev); + return 0; +} + +static struct platform_driver timbradio_platform_driver = { + .driver = { + .name = DRIVER_NAME, + }, + .probe = timbradio_probe, + .remove = timbradio_remove, +}; + +module_platform_driver(timbradio_platform_driver); + +MODULE_DESCRIPTION("Timberdale Radio driver"); +MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION("0.0.2"); +MODULE_ALIAS("platform:"DRIVER_NAME); |