246 lines
6.6 KiB
C
246 lines
6.6 KiB
C
/* 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 <media/v4l2-ctrls.h>
|
|
#include <media/v4l2-fh.h>
|
|
#include <media/v4l2-event.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)");
|
|
|
|
struct pcm20 {
|
|
struct v4l2_device v4l2_dev;
|
|
struct video_device vdev;
|
|
struct v4l2_ctrl_handler ctrl_handler;
|
|
unsigned long freq;
|
|
u32 audmode;
|
|
struct snd_miro_aci *aci;
|
|
struct mutex lock;
|
|
};
|
|
|
|
static struct pcm20 pcm20_card = {
|
|
.freq = 87 * 16000,
|
|
.audmode = V4L2_TUNER_MODE_STEREO,
|
|
};
|
|
|
|
static int pcm20_setfreq(struct pcm20 *dev, unsigned long freq)
|
|
{
|
|
unsigned char freql;
|
|
unsigned char freqh;
|
|
struct snd_miro_aci *aci = dev->aci;
|
|
|
|
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;
|
|
|
|
return snd_aci_cmd(aci, ACI_WRITE_TUNE, freql, freqh);
|
|
}
|
|
|
|
static const struct v4l2_file_operations pcm20_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = v4l2_fh_open,
|
|
.poll = v4l2_ctrl_poll,
|
|
.release = v4l2_fh_release,
|
|
.unlocked_ioctl = video_ioctl2,
|
|
};
|
|
|
|
static int vidioc_querycap(struct file *file, void *priv,
|
|
struct v4l2_capability *v)
|
|
{
|
|
struct pcm20 *dev = video_drvdata(file);
|
|
|
|
strlcpy(v->driver, "Miro PCM20", sizeof(v->driver));
|
|
strlcpy(v->card, "Miro PCM20", sizeof(v->card));
|
|
snprintf(v->bus_info, sizeof(v->bus_info), "ISA:%s", dev->v4l2_dev.name);
|
|
v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
|
|
v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_g_tuner(struct file *file, void *priv,
|
|
struct v4l2_tuner *v)
|
|
{
|
|
struct pcm20 *dev = video_drvdata(file);
|
|
int res;
|
|
|
|
if (v->index)
|
|
return -EINVAL;
|
|
strlcpy(v->name, "FM", sizeof(v->name));
|
|
v->type = V4L2_TUNER_RADIO;
|
|
v->rangelow = 87*16000;
|
|
v->rangehigh = 108*16000;
|
|
res = snd_aci_cmd(dev->aci, ACI_READ_TUNERSTATION, -1, -1);
|
|
v->signal = (res & 0x80) ? 0 : 0xffff;
|
|
/* Note: stereo detection does not work if the audio is muted,
|
|
it will default to mono in that case. */
|
|
res = snd_aci_cmd(dev->aci, ACI_READ_TUNERSTEREO, -1, -1);
|
|
v->rxsubchans = (res & 0x40) ? V4L2_TUNER_SUB_MONO :
|
|
V4L2_TUNER_SUB_STEREO;
|
|
v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
|
|
v->audmode = dev->audmode;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_s_tuner(struct file *file, void *priv,
|
|
const struct v4l2_tuner *v)
|
|
{
|
|
struct pcm20 *dev = video_drvdata(file);
|
|
|
|
if (v->index)
|
|
return -EINVAL;
|
|
if (v->audmode > V4L2_TUNER_MODE_STEREO)
|
|
dev->audmode = V4L2_TUNER_MODE_STEREO;
|
|
else
|
|
dev->audmode = v->audmode;
|
|
snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO,
|
|
dev->audmode == V4L2_TUNER_MODE_MONO, -1);
|
|
return 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,
|
|
const struct v4l2_frequency *f)
|
|
{
|
|
struct pcm20 *dev = video_drvdata(file);
|
|
|
|
if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
|
|
return -EINVAL;
|
|
|
|
dev->freq = clamp_t(u32, f->frequency, 87 * 16000U, 108 * 16000U);
|
|
pcm20_setfreq(dev, dev->freq);
|
|
return 0;
|
|
}
|
|
|
|
static int pcm20_s_ctrl(struct v4l2_ctrl *ctrl)
|
|
{
|
|
struct pcm20 *dev = container_of(ctrl->handler, struct pcm20, ctrl_handler);
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, ctrl->val, -1);
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
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_log_status = v4l2_ctrl_log_status,
|
|
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
|
|
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
|
|
};
|
|
|
|
static const struct v4l2_ctrl_ops pcm20_ctrl_ops = {
|
|
.s_ctrl = pcm20_s_ctrl,
|
|
};
|
|
|
|
static int __init pcm20_init(void)
|
|
{
|
|
struct pcm20 *dev = &pcm20_card;
|
|
struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
|
|
struct v4l2_ctrl_handler *hdl;
|
|
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, "radio-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;
|
|
}
|
|
|
|
hdl = &dev->ctrl_handler;
|
|
v4l2_ctrl_handler_init(hdl, 1);
|
|
v4l2_ctrl_new_std(hdl, &pcm20_ctrl_ops,
|
|
V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
|
|
v4l2_dev->ctrl_handler = hdl;
|
|
if (hdl->error) {
|
|
res = hdl->error;
|
|
v4l2_err(v4l2_dev, "Could not register control\n");
|
|
goto err_hdl;
|
|
}
|
|
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;
|
|
set_bit(V4L2_FL_USE_FH_PRIO, &dev->vdev.flags);
|
|
video_set_drvdata(&dev->vdev, dev);
|
|
snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO,
|
|
dev->audmode == V4L2_TUNER_MODE_MONO, -1);
|
|
pcm20_setfreq(dev, dev->freq);
|
|
|
|
if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0)
|
|
goto err_hdl;
|
|
|
|
v4l2_info(v4l2_dev, "Mirosound PCM20 Radio tuner\n");
|
|
return 0;
|
|
err_hdl:
|
|
v4l2_ctrl_handler_free(hdl);
|
|
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);
|
|
snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, 1, -1);
|
|
v4l2_ctrl_handler_free(&dev->ctrl_handler);
|
|
v4l2_device_unregister(&dev->v4l2_dev);
|
|
}
|
|
|
|
module_init(pcm20_init);
|
|
module_exit(pcm20_cleanup);
|