[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 <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);
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>
7f51a610	20	#include <media/v4l2-ctrls.h>
f7c096f7 HV	21	#include <media/v4l2-fh.h>
f7c096f7 HV	22	#include <media/v4l2-event.h>
8366fc39 KH	23	#include <sound/aci.h>
	24
	25	static int radio_nr = -1;
	26	module_param(radio_nr, int, 0);
	27	MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX). Default: -1 (autodetect)");
	28
8366fc39 KH	29	struct pcm20 {
	30	struct v4l2_device v4l2_dev;
	31	struct video_device vdev;
7f51a610	32	struct v4l2_ctrl_handler ctrl_handler;
8366fc39	33	unsigned long freq;
f5e7cc4a	34	u32 audmode;
8366fc39	35	struct snd_miro_aci *aci;
32958fdd	36	struct mutex lock;
8366fc39 KH	37	};
	38
	39	static struct pcm20 pcm20_card = {
f5e7cc4a HV	40	.freq = 87 * 16000,
f5e7cc4a HV	41	.audmode = V4L2_TUNER_MODE_STEREO,
8366fc39 KH	42	};
8366fc39 KH	43
8366fc39 KH	44	static int pcm20_setfreq(struct pcm20 *dev, unsigned long freq)
	45	{
	46	unsigned char freql;
	47	unsigned char freqh;
	48	struct snd_miro_aci *aci = dev->aci;
	49
8366fc39 KH	50	freq /= 160;
	51	if (!(aci->aci_version == 0x07 \|\| aci->aci_version >= 0xb0))
	52	freq /= 10; /* I don't know exactly which version
	53	* needs this hack */
	54	freql = freq & 0xff;
	55	freqh = freq >> 8;
	56
8366fc39 KH	57	return snd_aci_cmd(aci, ACI_WRITE_TUNE, freql, freqh);
	58	}
	59
	60	static const struct v4l2_file_operations pcm20_fops = {
	61	.owner = THIS_MODULE,
f7c096f7 HV	62	.open = v4l2_fh_open,
	63	.poll = v4l2_ctrl_poll,
	64	.release = v4l2_fh_release,
32958fdd	65	.unlocked_ioctl = video_ioctl2,
8366fc39 KH	66	};
	67
	68	static int vidioc_querycap(struct file file, void priv,
	69	struct v4l2_capability *v)
	70	{
f122d9a8 HV	71	struct pcm20 *dev = video_drvdata(file);
f122d9a8 HV	72
8366fc39 KH	73	strlcpy(v->driver, "Miro PCM20", sizeof(v->driver));
8366fc39 KH	74	strlcpy(v->card, "Miro PCM20", sizeof(v->card));
f122d9a8 HV	75	snprintf(v->bus_info, sizeof(v->bus_info), "ISA:%s", dev->v4l2_dev.name);
	76	v->device_caps = V4L2_CAP_TUNER \| V4L2_CAP_RADIO;
	77	v->capabilities = v->device_caps \| V4L2_CAP_DEVICE_CAPS;
8366fc39 KH	78	return 0;
	79	}
	80
	81	static int vidioc_g_tuner(struct file file, void priv,
	82	struct v4l2_tuner *v)
	83	{
f5e7cc4a	84	struct pcm20 *dev = video_drvdata(file);
9bbc5820	85	int res;
f5e7cc4a HV	86
f5e7cc4a HV	87	if (v->index)
8366fc39 KH	88	return -EINVAL;
	89	strlcpy(v->name, "FM", sizeof(v->name));
	90	v->type = V4L2_TUNER_RADIO;
	91	v->rangelow = 87*16000;
	92	v->rangehigh = 108*16000;
9bbc5820 HV	93	res = snd_aci_cmd(dev->aci, ACI_READ_TUNERSTATION, -1, -1);
	94	v->signal = (res & 0x80) ? 0 : 0xffff;
	95	/* Note: stereo detection does not work if the audio is muted,
	96	it will default to mono in that case. */
	97	res = snd_aci_cmd(dev->aci, ACI_READ_TUNERSTEREO, -1, -1);
	98	v->rxsubchans = (res & 0x40) ? V4L2_TUNER_SUB_MONO :
	99	V4L2_TUNER_SUB_STEREO;
f5e7cc4a HV	100	v->capability = V4L2_TUNER_CAP_LOW \| V4L2_TUNER_CAP_STEREO;
f5e7cc4a HV	101	v->audmode = dev->audmode;
8366fc39 KH	102	return 0;
	103	}
	104
	105	static int vidioc_s_tuner(struct file file, void priv,
2f73c7c5	106	const struct v4l2_tuner *v)
8366fc39	107	{
f5e7cc4a HV	108	struct pcm20 *dev = video_drvdata(file);
	109
	110	if (v->index)
	111	return -EINVAL;
	112	if (v->audmode > V4L2_TUNER_MODE_STEREO)
2f73c7c5 HV	113	dev->audmode = V4L2_TUNER_MODE_STEREO;
	114	else
	115	dev->audmode = v->audmode;
f5e7cc4a	116	snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO,
2f73c7c5	117	dev->audmode == V4L2_TUNER_MODE_MONO, -1);
f5e7cc4a	118	return 0;
8366fc39 KH	119	}
	120
	121	static int vidioc_g_frequency(struct file file, void priv,
	122	struct v4l2_frequency *f)
	123	{
	124	struct pcm20 *dev = video_drvdata(file);
	125
	126	if (f->tuner != 0)
	127	return -EINVAL;
	128
	129	f->type = V4L2_TUNER_RADIO;
	130	f->frequency = dev->freq;
	131	return 0;
	132	}
	133
	134
	135	static int vidioc_s_frequency(struct file file, void priv,
b530a447	136	const struct v4l2_frequency *f)
8366fc39 KH	137	{
	138	struct pcm20 *dev = video_drvdata(file);
	139
	140	if (f->tuner != 0 \|\| f->type != V4L2_TUNER_RADIO)
	141	return -EINVAL;
	142
b530a447	143	dev->freq = clamp_t(u32, f->frequency, 87 * 16000U, 108 * 16000U);
f5e7cc4a	144	pcm20_setfreq(dev, dev->freq);
8366fc39 KH	145	return 0;
	146	}
	147
7f51a610	148	static int pcm20_s_ctrl(struct v4l2_ctrl *ctrl)
8366fc39	149	{
7f51a610	150	struct pcm20 *dev = container_of(ctrl->handler, struct pcm20, ctrl_handler);
8366fc39 KH	151
	152	switch (ctrl->id) {
	153	case V4L2_CID_AUDIO_MUTE:
f5e7cc4a	154	snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, ctrl->val, -1);
7f51a610	155	return 0;
8366fc39	156	}
7f51a610	157	return -EINVAL;
8366fc39 KH	158	}
8366fc39 KH	159
8366fc39 KH	160	static const struct v4l2_ioctl_ops pcm20_ioctl_ops = {
	161	.vidioc_querycap = vidioc_querycap,
	162	.vidioc_g_tuner = vidioc_g_tuner,
	163	.vidioc_s_tuner = vidioc_s_tuner,
	164	.vidioc_g_frequency = vidioc_g_frequency,
	165	.vidioc_s_frequency = vidioc_s_frequency,
f7c096f7 HV	166	.vidioc_log_status = v4l2_ctrl_log_status,
	167	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	168	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
7f51a610 HV	169	};
	170
	171	static const struct v4l2_ctrl_ops pcm20_ctrl_ops = {
	172	.s_ctrl = pcm20_s_ctrl,
8366fc39 KH	173	};
	174
	175	static int __init pcm20_init(void)
	176	{
	177	struct pcm20 *dev = &pcm20_card;
	178	struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
7f51a610	179	struct v4l2_ctrl_handler *hdl;
8366fc39 KH	180	int res;
	181
	182	dev->aci = snd_aci_get_aci();
	183	if (dev->aci == NULL) {
	184	v4l2_err(v4l2_dev,
	185	"you must load the snd-miro driver first!\n");
	186	return -ENODEV;
	187	}
f122d9a8	188	strlcpy(v4l2_dev->name, "radio-miropcm20", sizeof(v4l2_dev->name));
32958fdd	189	mutex_init(&dev->lock);
8366fc39 KH	190
	191	res = v4l2_device_register(NULL, v4l2_dev);
	192	if (res < 0) {
	193	v4l2_err(v4l2_dev, "could not register v4l2_device\n");
	194	return -EINVAL;
	195	}
	196
7f51a610 HV	197	hdl = &dev->ctrl_handler;
	198	v4l2_ctrl_handler_init(hdl, 1);
	199	v4l2_ctrl_new_std(hdl, &pcm20_ctrl_ops,
	200	V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
	201	v4l2_dev->ctrl_handler = hdl;
	202	if (hdl->error) {
	203	res = hdl->error;
	204	v4l2_err(v4l2_dev, "Could not register control\n");
	205	goto err_hdl;
	206	}
8366fc39 KH	207	strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
	208	dev->vdev.v4l2_dev = v4l2_dev;
	209	dev->vdev.fops = &pcm20_fops;
	210	dev->vdev.ioctl_ops = &pcm20_ioctl_ops;
	211	dev->vdev.release = video_device_release_empty;
32958fdd	212	dev->vdev.lock = &dev->lock;
f7c096f7	213	set_bit(V4L2_FL_USE_FH_PRIO, &dev->vdev.flags);
8366fc39	214	video_set_drvdata(&dev->vdev, dev);
f5e7cc4a HV	215	snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO,
	216	dev->audmode == V4L2_TUNER_MODE_MONO, -1);
	217	pcm20_setfreq(dev, dev->freq);
8366fc39 KH	218
8366fc39 KH	219	if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0)
7f51a610	220	goto err_hdl;
8366fc39 KH	221
	222	v4l2_info(v4l2_dev, "Mirosound PCM20 Radio tuner\n");
	223	return 0;
7f51a610 HV	224	err_hdl:
7f51a610 HV	225	v4l2_ctrl_handler_free(hdl);
8366fc39 KH	226	v4l2_device_unregister(v4l2_dev);
	227	return -EINVAL;
	228	}
	229
	230	MODULE_AUTHOR("Ruurd Reitsma, Krzysztof Helt");
	231	MODULE_DESCRIPTION("A driver for the Miro PCM20 radio card.");
	232	MODULE_LICENSE("GPL");
	233
	234	static void __exit pcm20_cleanup(void)
	235	{
	236	struct pcm20 *dev = &pcm20_card;
	237
	238	video_unregister_device(&dev->vdev);
f5e7cc4a	239	snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, 1, -1);
7f51a610	240	v4l2_ctrl_handler_free(&dev->ctrl_handler);
8366fc39 KH	241	v4l2_device_unregister(&dev->v4l2_dev);
	242	}
	243
	244	module_init(pcm20_init);
	245	module_exit(pcm20_cleanup);