--- /dev/null
+/* Miro PCM20 radio driver for Linux radio support
+ * (c) 1998 Ruurd Reitsma <R.A.Reitsma@wbmt.tudelft.nl>
+ * Thanks to Norberto Pellici for the ACI device interface specification
+ * The API part is based on the radiotrack driver by M. Kirkwood
+ * This driver relies on the aci mixer provided by the snd-miro
+ * ALSA driver.
+ * Look there for further info...
+ */
+
+/* What ever you think about the ACI, version 0x07 is not very well!
+ * I can't get frequency, 'tuner status', 'tuner flags' or mute/mono
+ * conditions... Robert
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <sound/aci.h>
+
+static int radio_nr = -1;
+module_param(radio_nr, int, 0);
+MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX). Default: -1 (autodetect)");
+
+static int mono;
+module_param(mono, bool, 0);
+MODULE_PARM_DESC(mono, "Force tuner into mono mode.");
+
+struct pcm20 {
+ struct v4l2_device v4l2_dev;
+ struct video_device vdev;
+ unsigned long freq;
+ int muted;
+ struct snd_miro_aci *aci;
+};
+
+static struct pcm20 pcm20_card = {
+ .freq = 87*16000,
+ .muted = 1,
+};
+
+static int pcm20_mute(struct pcm20 *dev, unsigned char mute)
+{
+ dev->muted = mute;
+ return snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, mute, -1);
+}
+
+static int pcm20_stereo(struct pcm20 *dev, unsigned char stereo)
+{
+ return snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO, !stereo, -1);
+}
+
+static int pcm20_setfreq(struct pcm20 *dev, unsigned long freq)
+{
+ unsigned char freql;
+ unsigned char freqh;
+ struct snd_miro_aci *aci = dev->aci;
+
+ dev->freq = freq;
+
+ freq /= 160;
+ if (!(aci->aci_version == 0x07 || aci->aci_version >= 0xb0))
+ freq /= 10; /* I don't know exactly which version
+ * needs this hack */
+ freql = freq & 0xff;
+ freqh = freq >> 8;
+
+ pcm20_stereo(dev, !mono);
+ return snd_aci_cmd(aci, ACI_WRITE_TUNE, freql, freqh);
+}
+
+static const struct v4l2_file_operations pcm20_fops = {
+ .owner = THIS_MODULE,
+ .ioctl = video_ioctl2,
+};
+
+static int vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *v)
+{
+ strlcpy(v->driver, "Miro PCM20", sizeof(v->driver));
+ strlcpy(v->card, "Miro PCM20", sizeof(v->card));
+ strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
+ v->version = 0x1;
+ v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
+ return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *v)
+{
+ if (v->index) /* Only 1 tuner */
+ return -EINVAL;
+ strlcpy(v->name, "FM", sizeof(v->name));
+ v->type = V4L2_TUNER_RADIO;
+ v->rangelow = 87*16000;
+ v->rangehigh = 108*16000;
+ v->signal = 0xffff;
+ v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
+ v->capability = V4L2_TUNER_CAP_LOW;
+ v->audmode = V4L2_TUNER_MODE_MONO;
+ return 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *v)
+{
+ return v->index ? -EINVAL : 0;
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct pcm20 *dev = video_drvdata(file);
+
+ if (f->tuner != 0)
+ return -EINVAL;
+
+ f->type = V4L2_TUNER_RADIO;
+ f->frequency = dev->freq;
+ return 0;
+}
+
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct pcm20 *dev = video_drvdata(file);
+
+ if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
+ return -EINVAL;
+
+ dev->freq = f->frequency;
+ pcm20_setfreq(dev, f->frequency);
+ return 0;
+}
+
+static int vidioc_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *qc)
+{
+ switch (qc->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
+ }
+ return -EINVAL;
+}
+
+static int vidioc_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct pcm20 *dev = video_drvdata(file);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ ctrl->value = dev->muted;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int vidioc_s_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct pcm20 *dev = video_drvdata(file);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ pcm20_mute(dev, ctrl->value);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
+{
+ *i = 0;
+ return 0;
+}
+
+static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
+{
+ return i ? -EINVAL : 0;
+}
+
+static int 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 vidioc_s_audio(struct file *file, void *priv,
+ struct v4l2_audio *a)
+{
+ return a->index ? -EINVAL : 0;
+}
+
+static const struct v4l2_ioctl_ops pcm20_ioctl_ops = {
+ .vidioc_querycap = vidioc_querycap,
+ .vidioc_g_tuner = vidioc_g_tuner,
+ .vidioc_s_tuner = vidioc_s_tuner,
+ .vidioc_g_frequency = vidioc_g_frequency,
+ .vidioc_s_frequency = vidioc_s_frequency,
+ .vidioc_queryctrl = vidioc_queryctrl,
+ .vidioc_g_ctrl = vidioc_g_ctrl,
+ .vidioc_s_ctrl = vidioc_s_ctrl,
+ .vidioc_g_audio = vidioc_g_audio,
+ .vidioc_s_audio = vidioc_s_audio,
+ .vidioc_g_input = vidioc_g_input,
+ .vidioc_s_input = vidioc_s_input,
+};
+
+static int __init pcm20_init(void)
+{
+ struct pcm20 *dev = &pcm20_card;
+ struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
+ int res;
+
+ dev->aci = snd_aci_get_aci();
+ if (dev->aci == NULL) {
+ v4l2_err(v4l2_dev,
+ "you must load the snd-miro driver first!\n");
+ return -ENODEV;
+ }
+ strlcpy(v4l2_dev->name, "miropcm20", sizeof(v4l2_dev->name));
+
+
+ res = v4l2_device_register(NULL, v4l2_dev);
+ if (res < 0) {
+ v4l2_err(v4l2_dev, "could not register v4l2_device\n");
+ return -EINVAL;
+ }
+
+ strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
+ dev->vdev.v4l2_dev = v4l2_dev;
+ dev->vdev.fops = &pcm20_fops;
+ dev->vdev.ioctl_ops = &pcm20_ioctl_ops;
+ dev->vdev.release = video_device_release_empty;
+ video_set_drvdata(&dev->vdev, dev);
+
+ if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0)
+ goto fail;
+
+ v4l2_info(v4l2_dev, "Mirosound PCM20 Radio tuner\n");
+ return 0;
+fail:
+ v4l2_device_unregister(v4l2_dev);
+ return -EINVAL;
+}
+
+MODULE_AUTHOR("Ruurd Reitsma, Krzysztof Helt");
+MODULE_DESCRIPTION("A driver for the Miro PCM20 radio card.");
+MODULE_LICENSE("GPL");
+
+static void __exit pcm20_cleanup(void)
+{
+ struct pcm20 *dev = &pcm20_card;
+
+ video_unregister_device(&dev->vdev);
+ v4l2_device_unregister(&dev->v4l2_dev);
+}
+
+module_init(pcm20_init);
+module_exit(pcm20_cleanup);
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff