/* Miro PCM20 radio driver for Linux radio support * (c) 1998 Ruurd Reitsma * 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 #include #include #include #include #include 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; struct mutex lock; }; 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, .unlocked_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)); mutex_init(&dev->lock); 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; dev->vdev.lock = &dev->lock; 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);