1 /* Miro PCM20 radio driver for Linux radio support
2 * (c) 1998 Ruurd Reitsma <R.A.Reitsma@wbmt.tudelft.nl>
3 * Thanks to Norberto Pellici for the ACI device interface specification
4 * The API part is based on the radiotrack driver by M. Kirkwood
5 * This driver relies on the aci mixer provided by the snd-miro
7 * Look there for further info...
10 /* What ever you think about the ACI, version 0x07 is not very well!
11 * I can't get frequency, 'tuner status', 'tuner flags' or mute/mono
12 * conditions... Robert
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/videodev2.h>
18 #include <media/v4l2-device.h>
19 #include <media/v4l2-ioctl.h>
20 #include <sound/aci.h>
22 static int radio_nr = -1;
23 module_param(radio_nr, int, 0);
24 MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX). Default: -1 (autodetect)");
27 module_param(mono, bool, 0);
28 MODULE_PARM_DESC(mono, "Force tuner into mono mode.");
31 struct v4l2_device v4l2_dev;
32 struct video_device vdev;
35 struct snd_miro_aci *aci;
39 static struct pcm20 pcm20_card = {
44 static int pcm20_mute(struct pcm20 *dev, unsigned char mute)
47 return snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, mute, -1);
50 static int pcm20_stereo(struct pcm20 *dev, unsigned char stereo)
52 return snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO, !stereo, -1);
55 static int pcm20_setfreq(struct pcm20 *dev, unsigned long freq)
59 struct snd_miro_aci *aci = dev->aci;
64 if (!(aci->aci_version == 0x07 || aci->aci_version >= 0xb0))
65 freq /= 10; /* I don't know exactly which version
70 pcm20_stereo(dev, !mono);
71 return snd_aci_cmd(aci, ACI_WRITE_TUNE, freql, freqh);
74 static const struct v4l2_file_operations pcm20_fops = {
76 .unlocked_ioctl = video_ioctl2,
79 static int vidioc_querycap(struct file *file, void *priv,
80 struct v4l2_capability *v)
82 struct pcm20 *dev = video_drvdata(file);
84 strlcpy(v->driver, "Miro PCM20", sizeof(v->driver));
85 strlcpy(v->card, "Miro PCM20", sizeof(v->card));
86 snprintf(v->bus_info, sizeof(v->bus_info), "ISA:%s", dev->v4l2_dev.name);
87 v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
88 v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
92 static int vidioc_g_tuner(struct file *file, void *priv,
95 if (v->index) /* Only 1 tuner */
97 strlcpy(v->name, "FM", sizeof(v->name));
98 v->type = V4L2_TUNER_RADIO;
99 v->rangelow = 87*16000;
100 v->rangehigh = 108*16000;
102 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
103 v->capability = V4L2_TUNER_CAP_LOW;
104 v->audmode = V4L2_TUNER_MODE_MONO;
108 static int vidioc_s_tuner(struct file *file, void *priv,
109 struct v4l2_tuner *v)
111 return v->index ? -EINVAL : 0;
114 static int vidioc_g_frequency(struct file *file, void *priv,
115 struct v4l2_frequency *f)
117 struct pcm20 *dev = video_drvdata(file);
122 f->type = V4L2_TUNER_RADIO;
123 f->frequency = dev->freq;
128 static int vidioc_s_frequency(struct file *file, void *priv,
129 struct v4l2_frequency *f)
131 struct pcm20 *dev = video_drvdata(file);
133 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
136 dev->freq = f->frequency;
137 pcm20_setfreq(dev, f->frequency);
141 static int vidioc_queryctrl(struct file *file, void *priv,
142 struct v4l2_queryctrl *qc)
145 case V4L2_CID_AUDIO_MUTE:
146 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
151 static int vidioc_g_ctrl(struct file *file, void *priv,
152 struct v4l2_control *ctrl)
154 struct pcm20 *dev = video_drvdata(file);
157 case V4L2_CID_AUDIO_MUTE:
158 ctrl->value = dev->muted;
166 static int vidioc_s_ctrl(struct file *file, void *priv,
167 struct v4l2_control *ctrl)
169 struct pcm20 *dev = video_drvdata(file);
172 case V4L2_CID_AUDIO_MUTE:
173 pcm20_mute(dev, ctrl->value);
181 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
187 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
189 return i ? -EINVAL : 0;
192 static int vidioc_g_audio(struct file *file, void *priv,
193 struct v4l2_audio *a)
196 strlcpy(a->name, "Radio", sizeof(a->name));
197 a->capability = V4L2_AUDCAP_STEREO;
201 static int vidioc_s_audio(struct file *file, void *priv,
202 const struct v4l2_audio *a)
204 return a->index ? -EINVAL : 0;
207 static const struct v4l2_ioctl_ops pcm20_ioctl_ops = {
208 .vidioc_querycap = vidioc_querycap,
209 .vidioc_g_tuner = vidioc_g_tuner,
210 .vidioc_s_tuner = vidioc_s_tuner,
211 .vidioc_g_frequency = vidioc_g_frequency,
212 .vidioc_s_frequency = vidioc_s_frequency,
213 .vidioc_queryctrl = vidioc_queryctrl,
214 .vidioc_g_ctrl = vidioc_g_ctrl,
215 .vidioc_s_ctrl = vidioc_s_ctrl,
216 .vidioc_g_audio = vidioc_g_audio,
217 .vidioc_s_audio = vidioc_s_audio,
218 .vidioc_g_input = vidioc_g_input,
219 .vidioc_s_input = vidioc_s_input,
222 static int __init pcm20_init(void)
224 struct pcm20 *dev = &pcm20_card;
225 struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
228 dev->aci = snd_aci_get_aci();
229 if (dev->aci == NULL) {
231 "you must load the snd-miro driver first!\n");
234 strlcpy(v4l2_dev->name, "radio-miropcm20", sizeof(v4l2_dev->name));
235 mutex_init(&dev->lock);
237 res = v4l2_device_register(NULL, v4l2_dev);
239 v4l2_err(v4l2_dev, "could not register v4l2_device\n");
243 strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
244 dev->vdev.v4l2_dev = v4l2_dev;
245 dev->vdev.fops = &pcm20_fops;
246 dev->vdev.ioctl_ops = &pcm20_ioctl_ops;
247 dev->vdev.release = video_device_release_empty;
248 dev->vdev.lock = &dev->lock;
249 video_set_drvdata(&dev->vdev, dev);
251 if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0)
254 v4l2_info(v4l2_dev, "Mirosound PCM20 Radio tuner\n");
257 v4l2_device_unregister(v4l2_dev);
261 MODULE_AUTHOR("Ruurd Reitsma, Krzysztof Helt");
262 MODULE_DESCRIPTION("A driver for the Miro PCM20 radio card.");
263 MODULE_LICENSE("GPL");
265 static void __exit pcm20_cleanup(void)
267 struct pcm20 *dev = &pcm20_card;
269 video_unregister_device(&dev->vdev);
270 v4l2_device_unregister(&dev->v4l2_dev);
273 module_init(pcm20_init);
274 module_exit(pcm20_cleanup);