V4L/DVB: radio: Add radio-timb

This patch add supports for the radio system on the Intel Russellville board.

It's a In-Vehicle Infotainment board with a radio tuner and DSP.

This umbrella driver has the DSP and tuner as V4L2 subdevs and calls them
when needed.

Signed-off-by: Richard Röjfors <richard.rojfors@pelagicore.com>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 244 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-timb.c b/drivers/media/radio/radio-timb.c
new file mode 100644
index 000000000000..0de457f6e6eb
--- /dev/null
+++ b/drivers/media/radio/radio-timb.c
@@ -0,0 +1,244 @@
+/*
+ * radio-timb.c Timberdale FPGA Radio driver
+ * Copyright (c) 2009 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/version.h>
+#include <linux/io.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-device.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <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;
+};
+
+
+static int timbradio_vidioc_querycap(struct file *file, void  *priv,
+        struct v4l2_capability *v)
+{
+        strlcpy(v->driver, DRIVER_NAME, sizeof(v->driver));
+        strlcpy(v->card, "Timberdale Radio", sizeof(v->card));
+        snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME);
+        v->version = KERNEL_VERSION(0, 0, 1);
+        v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
+        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,
+        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_g_input(struct file *filp, void *priv,
+        unsigned int *i)
+{
+        *i = 0;
+        return 0;
+}
+
+static int timbradio_vidioc_s_input(struct file *filp, void *priv,
+        unsigned int i)
+{
+        return i ? -EINVAL : 0;
+}
+
+static int timbradio_vidioc_g_audio(struct file *file, void *priv,
+        struct v4l2_audio *a)
+{
+        a->index = 0;
+        strlcpy(a->name, "Radio", sizeof(a->name));
+        a->capability = V4L2_AUDCAP_STEREO;
+        return 0;
+}
+
+static int timbradio_vidioc_s_audio(struct file *file, void *priv,
+        struct v4l2_audio *a)
+{
+        return a->index ? -EINVAL : 0;
+}
+
+static int timbradio_vidioc_s_frequency(struct file *file, void *priv,
+        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 int timbradio_vidioc_queryctrl(struct file *file, void *priv,
+        struct v4l2_queryctrl *qc)
+{
+        struct timbradio *tr = video_drvdata(file);
+        return v4l2_subdev_call(tr->sd_dsp, core, queryctrl, qc);
+}
+
+static int timbradio_vidioc_g_ctrl(struct file *file, void *priv,
+        struct v4l2_control *ctrl)
+{
+        struct timbradio *tr = video_drvdata(file);
+        return v4l2_subdev_call(tr->sd_dsp, core, g_ctrl, ctrl);
+}
+
+static int timbradio_vidioc_s_ctrl(struct file *file, void *priv,
+        struct v4l2_control *ctrl)
+{
+        struct timbradio *tr = video_drvdata(file);
+        return v4l2_subdev_call(tr->sd_dsp, core, s_ctrl, ctrl);
+}
+
+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_g_input         = timbradio_vidioc_g_input,
+        .vidioc_s_input         = timbradio_vidioc_s_input,
+        .vidioc_g_audio         = timbradio_vidioc_g_audio,
+        .vidioc_s_audio         = timbradio_vidioc_s_audio,
+        .vidioc_queryctrl       = timbradio_vidioc_queryctrl,
+        .vidioc_g_ctrl          = timbradio_vidioc_g_ctrl,
+        .vidioc_s_ctrl          = timbradio_vidioc_s_ctrl
+};
+
+static const struct v4l2_file_operations timbradio_fops = {
+        .owner          = THIS_MODULE,
+        .ioctl          = video_ioctl2,
+};
+
+static int __devinit 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 = kzalloc(sizeof(*tr), GFP_KERNEL);
+        if (!tr) {
+                err = -ENOMEM;
+                goto err;
+        }
+
+        tr->pdata = *pdata;
+
+        strlcpy(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;
+
+        strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
+        err = v4l2_device_register(NULL, &tr->v4l2_dev);
+        if (err)
+                goto err_v4l2_dev;
+
+        tr->video_dev.v4l2_dev = &tr->v4l2_dev;
+
+        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:
+        video_device_release_empty(&tr->video_dev);
+        v4l2_device_unregister(&tr->v4l2_dev);
+err_v4l2_dev:
+        kfree(tr);
+err:
+        dev_err(&pdev->dev, "Failed to register: %d\n", err);
+
+        return err;
+}
+
+static int __devexit timbradio_remove(struct platform_device *pdev)
+{
+        struct timbradio *tr = platform_get_drvdata(pdev);
+
+        video_unregister_device(&tr->video_dev);
+        video_device_release_empty(&tr->video_dev);
+
+        v4l2_device_unregister(&tr->v4l2_dev);
+
+        kfree(tr);
+
+        return 0;
+}
+
+static struct platform_driver timbradio_platform_driver = {
+        .driver = {
+                .name   = DRIVER_NAME,
+                .owner  = THIS_MODULE,
+        },
+        .probe          = timbradio_probe,
+        .remove         = timbradio_remove,
+};
+
+/*--------------------------------------------------------------------------*/
+
+static int __init timbradio_init(void)
+{
+        return platform_driver_register(&timbradio_platform_driver);
+}
+
+static void __exit timbradio_exit(void)
+{
+        platform_driver_unregister(&timbradio_platform_driver);
+}
+
+module_init(timbradio_init);
+module_exit(timbradio_exit);
+
+MODULE_DESCRIPTION("Timberdale Radio driver");
+MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:"DRIVER_NAME);