[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / radio / radio-miropcm20.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 <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 bool 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)
{
	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)
{
	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 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,
};

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, "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;
	}

	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);
Commit	Line	Data
8366fc39 KH	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
	6	* ALSA driver.
	7	* Look there for further info...
	8	*/
	9
	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
	13	*/
	14
	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>
	21
	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)");
	25
90ab5ee9	26	static bool mono;
8366fc39 KH	27	module_param(mono, bool, 0);
	28	MODULE_PARM_DESC(mono, "Force tuner into mono mode.");
	29
	30	struct pcm20 {
	31	struct v4l2_device v4l2_dev;
	32	struct video_device vdev;
	33	unsigned long freq;
	34	int muted;
	35	struct snd_miro_aci *aci;
32958fdd	36	struct mutex lock;
8366fc39 KH	37	};
	38
	39	static struct pcm20 pcm20_card = {
	40	.freq = 87*16000,
	41	.muted = 1,
	42	};
	43
	44	static int pcm20_mute(struct pcm20 *dev, unsigned char mute)
	45	{
	46	dev->muted = mute;
	47	return snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, mute, -1);
	48	}
	49
	50	static int pcm20_stereo(struct pcm20 *dev, unsigned char stereo)
	51	{
	52	return snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO, !stereo, -1);
	53	}
	54
	55	static int pcm20_setfreq(struct pcm20 *dev, unsigned long freq)
	56	{
	57	unsigned char freql;
	58	unsigned char freqh;
	59	struct snd_miro_aci *aci = dev->aci;
	60
	61	dev->freq = freq;
	62
	63	freq /= 160;
	64	if (!(aci->aci_version == 0x07 \|\| aci->aci_version >= 0xb0))
	65	freq /= 10; /* I don't know exactly which version
	66	* needs this hack */
	67	freql = freq & 0xff;
	68	freqh = freq >> 8;
	69
	70	pcm20_stereo(dev, !mono);
	71	return snd_aci_cmd(aci, ACI_WRITE_TUNE, freql, freqh);
	72	}
	73
	74	static const struct v4l2_file_operations pcm20_fops = {
	75	.owner = THIS_MODULE,
32958fdd	76	.unlocked_ioctl = video_ioctl2,
8366fc39 KH	77	};
	78
	79	static int vidioc_querycap(struct file file, void priv,
	80	struct v4l2_capability *v)
	81	{
f122d9a8 HV	82	struct pcm20 *dev = video_drvdata(file);
f122d9a8 HV	83
8366fc39 KH	84	strlcpy(v->driver, "Miro PCM20", sizeof(v->driver));
8366fc39 KH	85	strlcpy(v->card, "Miro PCM20", sizeof(v->card));
f122d9a8 HV	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;
8366fc39 KH	89	return 0;
	90	}
	91
	92	static int vidioc_g_tuner(struct file file, void priv,
	93	struct v4l2_tuner *v)
	94	{
	95	if (v->index) /* Only 1 tuner */
	96	return -EINVAL;
	97	strlcpy(v->name, "FM", sizeof(v->name));
	98	v->type = V4L2_TUNER_RADIO;
	99	v->rangelow = 87*16000;
	100	v->rangehigh = 108*16000;
	101	v->signal = 0xffff;
	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;
	105	return 0;
	106	}
	107
	108	static int vidioc_s_tuner(struct file file, void priv,
	109	struct v4l2_tuner *v)
	110	{
	111	return v->index ? -EINVAL : 0;
	112	}
	113
	114	static int vidioc_g_frequency(struct file file, void priv,
	115	struct v4l2_frequency *f)
	116	{
	117	struct pcm20 *dev = video_drvdata(file);
	118
	119	if (f->tuner != 0)
	120	return -EINVAL;
	121
	122	f->type = V4L2_TUNER_RADIO;
	123	f->frequency = dev->freq;
	124	return 0;
	125	}
	126
	127
	128	static int vidioc_s_frequency(struct file file, void priv,
	129	struct v4l2_frequency *f)
	130	{
	131	struct pcm20 *dev = video_drvdata(file);
	132
	133	if (f->tuner != 0 \|\| f->type != V4L2_TUNER_RADIO)
	134	return -EINVAL;
	135
	136	dev->freq = f->frequency;
	137	pcm20_setfreq(dev, f->frequency);
	138	return 0;
	139	}
	140
	141	static int vidioc_queryctrl(struct file file, void priv,
	142	struct v4l2_queryctrl *qc)
	143	{
	144	switch (qc->id) {
	145	case V4L2_CID_AUDIO_MUTE:
	146	return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
	147	}
	148	return -EINVAL;
	149	}
	150
	151	static int vidioc_g_ctrl(struct file file, void priv,
	152	struct v4l2_control *ctrl)
153	{
154	struct pcm20 *dev = video_drvdata(file);
155
156	switch (ctrl->id) {
157	case V4L2_CID_AUDIO_MUTE:
158	ctrl->value = dev->muted;
159	break;
160	default:
161	return -EINVAL;
162	}
163	return 0;
164	}
165
166	static int vidioc_s_ctrl(struct file file, void priv,
167	struct v4l2_control *ctrl)
168	{
169	struct pcm20 *dev = video_drvdata(file);
170
171	switch (ctrl->id) {
172	case V4L2_CID_AUDIO_MUTE:
173	pcm20_mute(dev, ctrl->value);
174	break;
175	default:
176	return -EINVAL;
177	}
178	return 0;
179	}
180
8366fc39 KH	181	static const struct v4l2_ioctl_ops pcm20_ioctl_ops = {
	182	.vidioc_querycap = vidioc_querycap,
	183	.vidioc_g_tuner = vidioc_g_tuner,
	184	.vidioc_s_tuner = vidioc_s_tuner,
	185	.vidioc_g_frequency = vidioc_g_frequency,
	186	.vidioc_s_frequency = vidioc_s_frequency,
	187	.vidioc_queryctrl = vidioc_queryctrl,
	188	.vidioc_g_ctrl = vidioc_g_ctrl,
	189	.vidioc_s_ctrl = vidioc_s_ctrl,
8366fc39 KH	190	};
	191
	192	static int __init pcm20_init(void)
	193	{
	194	struct pcm20 *dev = &pcm20_card;
	195	struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
	196	int res;
	197
	198	dev->aci = snd_aci_get_aci();
	199	if (dev->aci == NULL) {
	200	v4l2_err(v4l2_dev,
	201	"you must load the snd-miro driver first!\n");
	202	return -ENODEV;
	203	}
f122d9a8	204	strlcpy(v4l2_dev->name, "radio-miropcm20", sizeof(v4l2_dev->name));
32958fdd	205	mutex_init(&dev->lock);
8366fc39 KH	206
	207	res = v4l2_device_register(NULL, v4l2_dev);
	208	if (res < 0) {
	209	v4l2_err(v4l2_dev, "could not register v4l2_device\n");
	210	return -EINVAL;
	211	}
	212
	213	strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
	214	dev->vdev.v4l2_dev = v4l2_dev;
	215	dev->vdev.fops = &pcm20_fops;
	216	dev->vdev.ioctl_ops = &pcm20_ioctl_ops;
	217	dev->vdev.release = video_device_release_empty;
32958fdd	218	dev->vdev.lock = &dev->lock;
8366fc39 KH	219	video_set_drvdata(&dev->vdev, dev);
	220
	221	if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0)
	222	goto fail;
	223
	224	v4l2_info(v4l2_dev, "Mirosound PCM20 Radio tuner\n");
	225	return 0;
	226	fail:
	227	v4l2_device_unregister(v4l2_dev);
	228	return -EINVAL;
	229	}
	230
	231	MODULE_AUTHOR("Ruurd Reitsma, Krzysztof Helt");
	232	MODULE_DESCRIPTION("A driver for the Miro PCM20 radio card.");
	233	MODULE_LICENSE("GPL");
	234
	235	static void __exit pcm20_cleanup(void)
	236	{
	237	struct pcm20 *dev = &pcm20_card;
	238
	239	video_unregister_device(&dev->vdev);
	240	v4l2_device_unregister(&dev->v4l2_dev);
	241	}
	242
	243	module_init(pcm20_init);
	244	module_exit(pcm20_cleanup);