[deliverable/linux.git] / drivers / media / radio / tea575x.c

/*
 *   ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips
 *
 *	Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <asm/io.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <media/v4l2-device.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-event.h>
#include <media/tea575x.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Routines for control of TEA5757/5759 Philips AM/FM radio tuner chips");
MODULE_LICENSE("GPL");

/*
 * definitions
 */

#define TEA575X_BIT_SEARCH	(1<<24)		/* 1 = search action, 0 = tuned */
#define TEA575X_BIT_UPDOWN	(1<<23)		/* 0 = search down, 1 = search up */
#define TEA575X_BIT_MONO	(1<<22)		/* 0 = stereo, 1 = mono */
#define TEA575X_BIT_BAND_MASK	(3<<20)
#define TEA575X_BIT_BAND_FM	(0<<20)
#define TEA575X_BIT_BAND_MW	(1<<20)
#define TEA575X_BIT_BAND_LW	(2<<20)
#define TEA575X_BIT_BAND_SW	(3<<20)
#define TEA575X_BIT_PORT_0	(1<<19)		/* user bit */
#define TEA575X_BIT_PORT_1	(1<<18)		/* user bit */
#define TEA575X_BIT_SEARCH_MASK	(3<<16)		/* search level */
#define TEA575X_BIT_SEARCH_5_28	     (0<<16)	/* FM >5uV, AM >28uV */
#define TEA575X_BIT_SEARCH_10_40     (1<<16)	/* FM >10uV, AM > 40uV */
#define TEA575X_BIT_SEARCH_30_63     (2<<16)	/* FM >30uV, AM > 63uV */
#define TEA575X_BIT_SEARCH_150_1000  (3<<16)	/* FM > 150uV, AM > 1000uV */
#define TEA575X_BIT_DUMMY	(1<<15)		/* buffer */
#define TEA575X_BIT_FREQ_MASK	0x7fff

enum { BAND_FM, BAND_FM_JAPAN, BAND_AM };

static const struct v4l2_frequency_band bands[] = {
	{
		.type = V4L2_TUNER_RADIO,
		.index = 0,
		.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
			      V4L2_TUNER_CAP_FREQ_BANDS,
		.rangelow   =  87500 * 16,
		.rangehigh  = 108000 * 16,
		.modulation = V4L2_BAND_MODULATION_FM,
	},
	{
		.type = V4L2_TUNER_RADIO,
		.index = 0,
		.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
			      V4L2_TUNER_CAP_FREQ_BANDS,
		.rangelow   = 76000 * 16,
		.rangehigh  = 91000 * 16,
		.modulation = V4L2_BAND_MODULATION_FM,
	},
	{
		.type = V4L2_TUNER_RADIO,
		.index = 1,
		.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS,
		.rangelow   =  530 * 16,
		.rangehigh  = 1710 * 16,
		.modulation = V4L2_BAND_MODULATION_AM,
	},
};

/*
 * lowlevel part
 */

static void snd_tea575x_write(struct snd_tea575x *tea, unsigned int val)
{
	u16 l;
	u8 data;

	if (tea->ops->write_val)
		return tea->ops->write_val(tea, val);

	tea->ops->set_direction(tea, 1);
	udelay(16);

	for (l = 25; l > 0; l--) {
		data = (val >> 24) & TEA575X_DATA;
		val <<= 1;			/* shift data */
		tea->ops->set_pins(tea, data | TEA575X_WREN);
		udelay(2);
		tea->ops->set_pins(tea, data | TEA575X_WREN | TEA575X_CLK);
		udelay(2);
		tea->ops->set_pins(tea, data | TEA575X_WREN);
		udelay(2);
	}

	if (!tea->mute)
		tea->ops->set_pins(tea, 0);
}

static u32 snd_tea575x_read(struct snd_tea575x *tea)
{
	u16 l, rdata;
	u32 data = 0;

	if (tea->ops->read_val)
		return tea->ops->read_val(tea);

	tea->ops->set_direction(tea, 0);
	tea->ops->set_pins(tea, 0);
	udelay(16);

	for (l = 24; l--;) {
		tea->ops->set_pins(tea, TEA575X_CLK);
		udelay(2);
		if (!l)
			tea->tuned = tea->ops->get_pins(tea) & TEA575X_MOST ? 0 : 1;
		tea->ops->set_pins(tea, 0);
		udelay(2);
		data <<= 1;			/* shift data */
		rdata = tea->ops->get_pins(tea);
		if (!l)
			tea->stereo = (rdata & TEA575X_MOST) ?  0 : 1;
		if (rdata & TEA575X_DATA)
			data++;
		udelay(2);
	}

	if (tea->mute)
		tea->ops->set_pins(tea, TEA575X_WREN);

	return data;
}

static u32 snd_tea575x_val_to_freq(struct snd_tea575x *tea, u32 val)
{
	u32 freq = val & TEA575X_BIT_FREQ_MASK;

	if (freq == 0)
		return freq;

	switch (tea->band) {
	case BAND_FM:
		/* freq *= 12.5 */
		freq *= 125;
		freq /= 10;
		/* crystal fixup */
		freq -= TEA575X_FMIF;
		break;
	case BAND_FM_JAPAN:
		/* freq *= 12.5 */
		freq *= 125;
		freq /= 10;
		/* crystal fixup */
		freq += TEA575X_FMIF;
		break;
	case BAND_AM:
		/* crystal fixup */
		freq -= TEA575X_AMIF;
		break;
	}

	return clamp(freq * 16, bands[tea->band].rangelow,
				bands[tea->band].rangehigh); /* from kHz */
}

static u32 snd_tea575x_get_freq(struct snd_tea575x *tea)
{
	return snd_tea575x_val_to_freq(tea, snd_tea575x_read(tea));
}

void snd_tea575x_set_freq(struct snd_tea575x *tea)
{
	u32 freq = tea->freq / 16;	/* to kHz */
	u32 band = 0;

	switch (tea->band) {
	case BAND_FM:
		band = TEA575X_BIT_BAND_FM;
		/* crystal fixup */
		freq += TEA575X_FMIF;
		/* freq /= 12.5 */
		freq *= 10;
		freq /= 125;
		break;
	case BAND_FM_JAPAN:
		band = TEA575X_BIT_BAND_FM;
		/* crystal fixup */
		freq -= TEA575X_FMIF;
		/* freq /= 12.5 */
		freq *= 10;
		freq /= 125;
		break;
	case BAND_AM:
		band = TEA575X_BIT_BAND_MW;
		/* crystal fixup */
		freq += TEA575X_AMIF;
		break;
	}

	tea->val &= ~(TEA575X_BIT_FREQ_MASK | TEA575X_BIT_BAND_MASK);
	tea->val |= band;
	tea->val |= freq & TEA575X_BIT_FREQ_MASK;
	snd_tea575x_write(tea, tea->val);
	tea->freq = snd_tea575x_val_to_freq(tea, tea->val);
}

/*
 * Linux Video interface
 */

static int vidioc_querycap(struct file *file, void  *priv,
					struct v4l2_capability *v)
{
	struct snd_tea575x *tea = video_drvdata(file);

	strlcpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver));
	strlcpy(v->card, tea->card, sizeof(v->card));
	strlcat(v->card, tea->tea5759 ? " TEA5759" : " TEA5757", sizeof(v->card));
	strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
	v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
	if (!tea->cannot_read_data)
		v->device_caps |= V4L2_CAP_HW_FREQ_SEEK;
	v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
	return 0;
}

static int vidioc_enum_freq_bands(struct file *file, void *priv,
					 struct v4l2_frequency_band *band)
{
	struct snd_tea575x *tea = video_drvdata(file);
	int index;

	if (band->tuner != 0)
		return -EINVAL;

	switch (band->index) {
	case 0:
		if (tea->tea5759)
			index = BAND_FM_JAPAN;
		else
			index = BAND_FM;
		break;
	case 1:
		if (tea->has_am) {
			index = BAND_AM;
			break;
		}
		/* Fall through */
	default:
		return -EINVAL;
	}

	*band = bands[index];
	if (!tea->cannot_read_data)
		band->capability |= V4L2_TUNER_CAP_HWSEEK_BOUNDED;

	return 0;
}

static int vidioc_g_tuner(struct file *file, void *priv,
					struct v4l2_tuner *v)
{
	struct snd_tea575x *tea = video_drvdata(file);
	struct v4l2_frequency_band band_fm = { 0, };

	if (v->index > 0)
		return -EINVAL;

	snd_tea575x_read(tea);
	vidioc_enum_freq_bands(file, priv, &band_fm);

	memset(v, 0, sizeof(*v));
	strlcpy(v->name, tea->has_am ? "FM/AM" : "FM", sizeof(v->name));
	v->type = V4L2_TUNER_RADIO;
	v->capability = band_fm.capability;
	v->rangelow = tea->has_am ? bands[BAND_AM].rangelow : band_fm.rangelow;
	v->rangehigh = band_fm.rangehigh;
	v->rxsubchans = tea->stereo ? V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
	v->audmode = (tea->val & TEA575X_BIT_MONO) ?
		V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO;
	v->signal = tea->tuned ? 0xffff : 0;
	return 0;
}

static int vidioc_s_tuner(struct file *file, void *priv,
					const struct v4l2_tuner *v)
{
	struct snd_tea575x *tea = video_drvdata(file);
	u32 orig_val = tea->val;

	if (v->index)
		return -EINVAL;
	tea->val &= ~TEA575X_BIT_MONO;
	if (v->audmode == V4L2_TUNER_MODE_MONO)
		tea->val |= TEA575X_BIT_MONO;
	/* Only apply changes if currently tuning FM */
	if (tea->band != BAND_AM && tea->val != orig_val)
		snd_tea575x_set_freq(tea);

	return 0;
}

static int vidioc_g_frequency(struct file *file, void *priv,
					struct v4l2_frequency *f)
{
	struct snd_tea575x *tea = video_drvdata(file);

	if (f->tuner != 0)
		return -EINVAL;
	f->type = V4L2_TUNER_RADIO;
	f->frequency = tea->freq;
	return 0;
}

static int vidioc_s_frequency(struct file *file, void *priv,
					const struct v4l2_frequency *f)
{
	struct snd_tea575x *tea = video_drvdata(file);

	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
		return -EINVAL;

	if (tea->has_am && f->frequency < (20000 * 16))
		tea->band = BAND_AM;
	else if (tea->tea5759)
		tea->band = BAND_FM_JAPAN;
	else
		tea->band = BAND_FM;

	tea->freq = clamp_t(u32, f->frequency, bands[tea->band].rangelow,
					bands[tea->band].rangehigh);
	snd_tea575x_set_freq(tea);
	return 0;
}

static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
					const struct v4l2_hw_freq_seek *a)
{
	struct snd_tea575x *tea = video_drvdata(file);
	unsigned long timeout;
	int i, spacing;

	if (tea->cannot_read_data)
		return -ENOTTY;
	if (a->tuner || a->wrap_around)
		return -EINVAL;

	if (file->f_flags & O_NONBLOCK)
		return -EWOULDBLOCK;

	if (a->rangelow || a->rangehigh) {
		for (i = 0; i < ARRAY_SIZE(bands); i++) {
			if ((i == BAND_FM && tea->tea5759) ||
			    (i == BAND_FM_JAPAN && !tea->tea5759) ||
			    (i == BAND_AM && !tea->has_am))
				continue;
			if (bands[i].rangelow  == a->rangelow &&
			    bands[i].rangehigh == a->rangehigh)
				break;
		}
		if (i == ARRAY_SIZE(bands))
			return -EINVAL; /* No matching band found */
		if (i != tea->band) {
			tea->band = i;
			tea->freq = clamp(tea->freq, bands[i].rangelow,
						     bands[i].rangehigh);
			snd_tea575x_set_freq(tea);
		}
	}

	spacing = (tea->band == BAND_AM) ? 5 : 50; /* kHz */

	/* clear the frequency, HW will fill it in */
	tea->val &= ~TEA575X_BIT_FREQ_MASK;
	tea->val |= TEA575X_BIT_SEARCH;
	if (a->seek_upward)
		tea->val |= TEA575X_BIT_UPDOWN;
	else
		tea->val &= ~TEA575X_BIT_UPDOWN;
	snd_tea575x_write(tea, tea->val);
	timeout = jiffies + msecs_to_jiffies(10000);
	for (;;) {
		if (time_after(jiffies, timeout))
			break;
		if (schedule_timeout_interruptible(msecs_to_jiffies(10))) {
			/* some signal arrived, stop search */
			tea->val &= ~TEA575X_BIT_SEARCH;
			snd_tea575x_set_freq(tea);
			return -ERESTARTSYS;
		}
		if (!(snd_tea575x_read(tea) & TEA575X_BIT_SEARCH)) {
			u32 freq;

			/* Found a frequency, wait until it can be read */
			for (i = 0; i < 100; i++) {
				msleep(10);
				freq = snd_tea575x_get_freq(tea);
				if (freq) /* available */
					break;
			}
			if (freq == 0) /* shouldn't happen */
				break;
			/*
			 * if we moved by less than the spacing, or in the
			 * wrong direction, continue seeking
			 */
			if (abs(tea->freq - freq) < 16 * spacing ||
					(a->seek_upward && freq < tea->freq) ||
					(!a->seek_upward && freq > tea->freq)) {
				snd_tea575x_write(tea, tea->val);
				continue;
			}
			tea->freq = freq;
			tea->val &= ~TEA575X_BIT_SEARCH;
			return 0;
		}
	}
	tea->val &= ~TEA575X_BIT_SEARCH;
	snd_tea575x_set_freq(tea);
	return -ENODATA;
}

static int tea575x_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct snd_tea575x *tea = container_of(ctrl->handler, struct snd_tea575x, ctrl_handler);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		tea->mute = ctrl->val;
		snd_tea575x_set_freq(tea);
		return 0;
	}

	return -EINVAL;
}

static const struct v4l2_file_operations tea575x_fops = {
	.unlocked_ioctl	= video_ioctl2,
	.open           = v4l2_fh_open,
	.release        = v4l2_fh_release,
	.poll           = v4l2_ctrl_poll,
};

static const struct v4l2_ioctl_ops tea575x_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_s_hw_freq_seek = vidioc_s_hw_freq_seek,
	.vidioc_enum_freq_bands = vidioc_enum_freq_bands,
	.vidioc_log_status  = v4l2_ctrl_log_status,
	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};

static const struct video_device tea575x_radio = {
	.ioctl_ops 	= &tea575x_ioctl_ops,
	.release        = video_device_release_empty,
};

static const struct v4l2_ctrl_ops tea575x_ctrl_ops = {
	.s_ctrl = tea575x_s_ctrl,
};


int snd_tea575x_hw_init(struct snd_tea575x *tea)
{
	tea->mute = true;

	/* Not all devices can or know how to read the data back.
	   Such devices can set cannot_read_data to true. */
	if (!tea->cannot_read_data) {
		snd_tea575x_write(tea, 0x55AA);
		if (snd_tea575x_read(tea) != 0x55AA)
			return -ENODEV;
	}

	tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_5_28;
	tea->freq = 90500 * 16;		/* 90.5Mhz default */
	snd_tea575x_set_freq(tea);

	return 0;
}
EXPORT_SYMBOL(snd_tea575x_hw_init);

int snd_tea575x_init(struct snd_tea575x *tea, struct module *owner)
{
	int retval = snd_tea575x_hw_init(tea);

	if (retval)
		return retval;

	tea->vd = tea575x_radio;
	video_set_drvdata(&tea->vd, tea);
	mutex_init(&tea->mutex);
	strlcpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name));
	tea->vd.lock = &tea->mutex;
	tea->vd.v4l2_dev = tea->v4l2_dev;
	tea->fops = tea575x_fops;
	tea->fops.owner = owner;
	tea->vd.fops = &tea->fops;
	set_bit(V4L2_FL_USE_FH_PRIO, &tea->vd.flags);
	/* disable hw_freq_seek if we can't use it */
	if (tea->cannot_read_data)
		v4l2_disable_ioctl(&tea->vd, VIDIOC_S_HW_FREQ_SEEK);

	if (!tea->cannot_mute) {
		tea->vd.ctrl_handler = &tea->ctrl_handler;
		v4l2_ctrl_handler_init(&tea->ctrl_handler, 1);
		v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops,
				  V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
		retval = tea->ctrl_handler.error;
		if (retval) {
			v4l2_err(tea->v4l2_dev, "can't initialize controls\n");
			v4l2_ctrl_handler_free(&tea->ctrl_handler);
			return retval;
		}

		if (tea->ext_init) {
			retval = tea->ext_init(tea);
			if (retval) {
				v4l2_ctrl_handler_free(&tea->ctrl_handler);
				return retval;
			}
		}

		v4l2_ctrl_handler_setup(&tea->ctrl_handler);
	}

	retval = video_register_device(&tea->vd, VFL_TYPE_RADIO, tea->radio_nr);
	if (retval) {
		v4l2_err(tea->v4l2_dev, "can't register video device!\n");
		v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
		return retval;
	}

	return 0;
}

void snd_tea575x_exit(struct snd_tea575x *tea)
{
	video_unregister_device(&tea->vd);
	v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
}

static int __init alsa_tea575x_module_init(void)
{
	return 0;
}

static void __exit alsa_tea575x_module_exit(void)
{
}

module_init(alsa_tea575x_module_init)
module_exit(alsa_tea575x_module_exit)

EXPORT_SYMBOL(snd_tea575x_init);
EXPORT_SYMBOL(snd_tea575x_exit);
EXPORT_SYMBOL(snd_tea575x_set_freq);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips
	3	*
c1017a4c	4	* Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
1da177e4 LT	5	*
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*
4b29631d	21	*/
1da177e4	22
1da177e4 LT	23	#include <asm/io.h>
1da177e4 LT	24	#include <linux/delay.h>
da155d5b	25	#include <linux/module.h>
1da177e4	26	#include <linux/init.h>
5a0e3ad6	27	#include <linux/slab.h>
d4ecc83b HV	28	#include <linux/sched.h>
d4ecc83b HV	29	#include <media/v4l2-device.h>
4522e825	30	#include <media/v4l2-dev.h>
d4ecc83b	31	#include <media/v4l2-fh.h>
4522e825	32	#include <media/v4l2-ioctl.h>
d4ecc83b	33	#include <media/v4l2-event.h>
59b56459	34	#include <media/tea575x.h>
1da177e4	35
c1017a4c	36	MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
1da177e4 LT	37	MODULE_DESCRIPTION("Routines for control of TEA5757/5759 Philips AM/FM radio tuner chips");
	38	MODULE_LICENSE("GPL");
	39
	40	/*
	41	* definitions
	42	*/
	43
	44	#define TEA575X_BIT_SEARCH (1<<24) /* 1 = search action, 0 = tuned */
	45	#define TEA575X_BIT_UPDOWN (1<<23) /* 0 = search down, 1 = search up */
	46	#define TEA575X_BIT_MONO (1<<22) /* 0 = stereo, 1 = mono */
	47	#define TEA575X_BIT_BAND_MASK (3<<20)
	48	#define TEA575X_BIT_BAND_FM (0<<20)
	49	#define TEA575X_BIT_BAND_MW (1<<20)
fc488517 HG	50	#define TEA575X_BIT_BAND_LW (2<<20)
fc488517 HG	51	#define TEA575X_BIT_BAND_SW (3<<20)
1da177e4 LT	52	#define TEA575X_BIT_PORT_0 (1<<19) /* user bit */
	53	#define TEA575X_BIT_PORT_1 (1<<18) /* user bit */
	54	#define TEA575X_BIT_SEARCH_MASK (3<<16) /* search level */
	55	#define TEA575X_BIT_SEARCH_5_28 (0<<16) /* FM >5uV, AM >28uV */
	56	#define TEA575X_BIT_SEARCH_10_40 (1<<16) /* FM >10uV, AM > 40uV */
	57	#define TEA575X_BIT_SEARCH_30_63 (2<<16) /* FM >30uV, AM > 63uV */
	58	#define TEA575X_BIT_SEARCH_150_1000 (3<<16) /* FM > 150uV, AM > 1000uV */
	59	#define TEA575X_BIT_DUMMY (1<<15) /* buffer */
	60	#define TEA575X_BIT_FREQ_MASK 0x7fff
	61
fc488517 HG	62	enum { BAND_FM, BAND_FM_JAPAN, BAND_AM };
	63
	64	static const struct v4l2_frequency_band bands[] = {
	65	{
	66	.type = V4L2_TUNER_RADIO,
	67	.index = 0,
	68	.capability = V4L2_TUNER_CAP_LOW \| V4L2_TUNER_CAP_STEREO \|
	69	V4L2_TUNER_CAP_FREQ_BANDS,
	70	.rangelow = 87500 * 16,
	71	.rangehigh = 108000 * 16,
	72	.modulation = V4L2_BAND_MODULATION_FM,
	73	},
	74	{
	75	.type = V4L2_TUNER_RADIO,
	76	.index = 0,
	77	.capability = V4L2_TUNER_CAP_LOW \| V4L2_TUNER_CAP_STEREO \|
	78	V4L2_TUNER_CAP_FREQ_BANDS,
	79	.rangelow = 76000 * 16,
	80	.rangehigh = 91000 * 16,
	81	.modulation = V4L2_BAND_MODULATION_FM,
	82	},
	83	{
	84	.type = V4L2_TUNER_RADIO,
	85	.index = 1,
	86	.capability = V4L2_TUNER_CAP_LOW \| V4L2_TUNER_CAP_FREQ_BANDS,
	87	.rangelow = 530 * 16,
	88	.rangehigh = 1710 * 16,
	89	.modulation = V4L2_BAND_MODULATION_AM,
	90	},
	91	};
	92
1da177e4 LT	93	/*
	94	* lowlevel part
	95	*/
	96
14219d06 OZ	97	static void snd_tea575x_write(struct snd_tea575x *tea, unsigned int val)
	98	{
	99	u16 l;
	100	u8 data;
	101
31a62d41 HG	102	if (tea->ops->write_val)
	103	return tea->ops->write_val(tea, val);
	104
14219d06 OZ	105	tea->ops->set_direction(tea, 1);
	106	udelay(16);
	107
	108	for (l = 25; l > 0; l--) {
	109	data = (val >> 24) & TEA575X_DATA;
	110	val <<= 1; /* shift data */
	111	tea->ops->set_pins(tea, data \| TEA575X_WREN);
	112	udelay(2);
	113	tea->ops->set_pins(tea, data \| TEA575X_WREN \| TEA575X_CLK);
	114	udelay(2);
	115	tea->ops->set_pins(tea, data \| TEA575X_WREN);
	116	udelay(2);
	117	}
	118
	119	if (!tea->mute)
	120	tea->ops->set_pins(tea, 0);
	121	}
	122
bc2b395c	123	static u32 snd_tea575x_read(struct snd_tea575x *tea)
14219d06 OZ	124	{
	125	u16 l, rdata;
	126	u32 data = 0;
	127
31a62d41 HG	128	if (tea->ops->read_val)
	129	return tea->ops->read_val(tea);
	130
14219d06 OZ	131	tea->ops->set_direction(tea, 0);
	132	tea->ops->set_pins(tea, 0);
	133	udelay(16);
	134
	135	for (l = 24; l--;) {
	136	tea->ops->set_pins(tea, TEA575X_CLK);
	137	udelay(2);
	138	if (!l)
	139	tea->tuned = tea->ops->get_pins(tea) & TEA575X_MOST ? 0 : 1;
	140	tea->ops->set_pins(tea, 0);
	141	udelay(2);
	142	data <<= 1; /* shift data */
	143	rdata = tea->ops->get_pins(tea);
	144	if (!l)
	145	tea->stereo = (rdata & TEA575X_MOST) ? 0 : 1;
	146	if (rdata & TEA575X_DATA)
	147	data++;
	148	udelay(2);
	149	}
	150
	151	if (tea->mute)
	152	tea->ops->set_pins(tea, TEA575X_WREN);
	153
	154	return data;
	155	}
	156
40e006ae	157	static u32 snd_tea575x_val_to_freq(struct snd_tea575x *tea, u32 val)
bc2b395c	158	{
40e006ae	159	u32 freq = val & TEA575X_BIT_FREQ_MASK;
bc2b395c HV	160
	161	if (freq == 0)
	162	return freq;
	163
fc488517 HG	164	switch (tea->band) {
	165	case BAND_FM:
	166	/* freq = 12.5 /
	167	freq *= 125;
	168	freq /= 10;
	169	/* crystal fixup */
bc2b395c	170	freq -= TEA575X_FMIF;
fc488517 HG	171	break;
	172	case BAND_FM_JAPAN:
	173	/* freq = 12.5 /
	174	freq *= 125;
	175	freq /= 10;
	176	/* crystal fixup */
	177	freq += TEA575X_FMIF;
	178	break;
	179	case BAND_AM:
	180	/* crystal fixup */
	181	freq -= TEA575X_AMIF;
	182	break;
	183	}
bc2b395c	184
fc488517 HG	185	return clamp(freq * 16, bands[tea->band].rangelow,
fc488517 HG	186	bands[tea->band].rangehigh); /* from kHz */
bc2b395c HV	187	}
bc2b395c HV	188
40e006ae HG	189	static u32 snd_tea575x_get_freq(struct snd_tea575x *tea)
	190	{
	191	return snd_tea575x_val_to_freq(tea, snd_tea575x_read(tea));
	192	}
	193
559c2009	194	void snd_tea575x_set_freq(struct snd_tea575x *tea)
1da177e4	195	{
fc488517 HG	196	u32 freq = tea->freq / 16; /* to kHz */
fc488517 HG	197	u32 band = 0;
1da177e4	198
fc488517 HG	199	switch (tea->band) {
	200	case BAND_FM:
	201	band = TEA575X_BIT_BAND_FM;
	202	/* crystal fixup */
ea27316e	203	freq += TEA575X_FMIF;
fc488517 HG	204	/* freq /= 12.5 */
	205	freq *= 10;
	206	freq /= 125;
	207	break;
	208	case BAND_FM_JAPAN:
	209	band = TEA575X_BIT_BAND_FM;
	210	/* crystal fixup */
	211	freq -= TEA575X_FMIF;
	212	/* freq /= 12.5 */
	213	freq *= 10;
	214	freq /= 125;
	215	break;
	216	case BAND_AM:
	217	band = TEA575X_BIT_BAND_MW;
	218	/* crystal fixup */
	219	freq += TEA575X_AMIF;
	220	break;
	221	}
1da177e4	222
fc488517 HG	223	tea->val &= ~(TEA575X_BIT_FREQ_MASK \| TEA575X_BIT_BAND_MASK);
fc488517 HG	224	tea->val \|= band;
1da177e4	225	tea->val \|= freq & TEA575X_BIT_FREQ_MASK;
14219d06	226	snd_tea575x_write(tea, tea->val);
40e006ae	227	tea->freq = snd_tea575x_val_to_freq(tea, tea->val);
1da177e4 LT	228	}
	229
	230	/*
	231	* Linux Video interface
	232	*/
	233
9b76ede4 MCC	234	static int vidioc_querycap(struct file file, void priv,
9b76ede4 MCC	235	struct v4l2_capability *v)
1da177e4	236	{
c170ecf4	237	struct snd_tea575x *tea = video_drvdata(file);
9b76ede4	238
d4ecc83b	239	strlcpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver));
10ca7201 OZ	240	strlcpy(v->card, tea->card, sizeof(v->card));
	241	strlcat(v->card, tea->tea5759 ? " TEA5759" : " TEA5757", sizeof(v->card));
	242	strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
d4ecc83b HV	243	v->device_caps = V4L2_CAP_TUNER \| V4L2_CAP_RADIO;
	244	if (!tea->cannot_read_data)
	245	v->device_caps \|= V4L2_CAP_HW_FREQ_SEEK;
	246	v->capabilities = v->device_caps \| V4L2_CAP_DEVICE_CAPS;
9b76ede4 MCC	247	return 0;
	248	}
	249
fc488517 HG	250	static int vidioc_enum_freq_bands(struct file file, void priv,
	251	struct v4l2_frequency_band *band)
	252	{
	253	struct snd_tea575x *tea = video_drvdata(file);
	254	int index;
	255
	256	if (band->tuner != 0)
	257	return -EINVAL;
	258
	259	switch (band->index) {
	260	case 0:
	261	if (tea->tea5759)
	262	index = BAND_FM_JAPAN;
	263	else
	264	index = BAND_FM;
	265	break;
	266	case 1:
	267	if (tea->has_am) {
	268	index = BAND_AM;
	269	break;
	270	}
	271	/* Fall through */
	272	default:
	273	return -EINVAL;
	274	}
	275
	276	*band = bands[index];
	277	if (!tea->cannot_read_data)
	278	band->capability \|= V4L2_TUNER_CAP_HWSEEK_BOUNDED;
	279
	280	return 0;
	281	}
	282
9b76ede4 MCC	283	static int vidioc_g_tuner(struct file file, void priv,
	284	struct v4l2_tuner *v)
	285	{
375d1358	286	struct snd_tea575x *tea = video_drvdata(file);
fc488517	287	struct v4l2_frequency_band band_fm = { 0, };
375d1358	288
9b76ede4 MCC	289	if (v->index > 0)
	290	return -EINVAL;
	291
14219d06	292	snd_tea575x_read(tea);
fc488517	293	vidioc_enum_freq_bands(file, priv, &band_fm);
375d1358	294
fc488517 HG	295	memset(v, 0, sizeof(*v));
fc488517 HG	296	strlcpy(v->name, tea->has_am ? "FM/AM" : "FM", sizeof(v->name));
9b76ede4	297	v->type = V4L2_TUNER_RADIO;
fc488517 HG	298	v->capability = band_fm.capability;
	299	v->rangelow = tea->has_am ? bands[BAND_AM].rangelow : band_fm.rangelow;
	300	v->rangehigh = band_fm.rangehigh;
d4ecc83b HV	301	v->rxsubchans = tea->stereo ? V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
	302	v->audmode = (tea->val & TEA575X_BIT_MONO) ?
	303	V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO;
375d1358	304	v->signal = tea->tuned ? 0xffff : 0;
9b76ede4 MCC	305	return 0;
	306	}
	307
	308	static int vidioc_s_tuner(struct file file, void priv,
2f73c7c5	309	const struct v4l2_tuner *v)
9b76ede4	310	{
d4ecc83b	311	struct snd_tea575x *tea = video_drvdata(file);
fc488517	312	u32 orig_val = tea->val;
d4ecc83b HV	313
d4ecc83b HV	314	if (v->index)
9b76ede4	315	return -EINVAL;
d4ecc83b HV	316	tea->val &= ~TEA575X_BIT_MONO;
	317	if (v->audmode == V4L2_TUNER_MODE_MONO)
	318	tea->val \|= TEA575X_BIT_MONO;
fc488517 HG	319	/* Only apply changes if currently tuning FM */
	320	if (tea->band != BAND_AM && tea->val != orig_val)
	321	snd_tea575x_set_freq(tea);
	322
9b76ede4 MCC	323	return 0;
	324	}
	325
	326	static int vidioc_g_frequency(struct file file, void priv,
	327	struct v4l2_frequency *f)
	328	{
	329	struct snd_tea575x *tea = video_drvdata(file);
	330
375d1358 OZ	331	if (f->tuner != 0)
375d1358 OZ	332	return -EINVAL;
9b76ede4 MCC	333	f->type = V4L2_TUNER_RADIO;
	334	f->frequency = tea->freq;
	335	return 0;
	336	}
	337
	338	static int vidioc_s_frequency(struct file file, void priv,
b530a447	339	const struct v4l2_frequency *f)
9b76ede4 MCC	340	{
	341	struct snd_tea575x *tea = video_drvdata(file);
	342
375d1358 OZ	343	if (f->tuner != 0 \|\| f->type != V4L2_TUNER_RADIO)
	344	return -EINVAL;
	345
fc488517 HG	346	if (tea->has_am && f->frequency < (20000 * 16))
	347	tea->band = BAND_AM;
	348	else if (tea->tea5759)
	349	tea->band = BAND_FM_JAPAN;
	350	else
	351	tea->band = BAND_FM;
	352
b530a447	353	tea->freq = clamp_t(u32, f->frequency, bands[tea->band].rangelow,
fc488517	354	bands[tea->band].rangehigh);
9b76ede4	355	snd_tea575x_set_freq(tea);
9b76ede4 MCC	356	return 0;
	357	}
	358
d4ecc83b	359	static int vidioc_s_hw_freq_seek(struct file file, void fh,
ec6f4328	360	const struct v4l2_hw_freq_seek *a)
9b76ede4	361	{
d4ecc83b	362	struct snd_tea575x *tea = video_drvdata(file);
bc2b395c	363	unsigned long timeout;
fc488517	364	int i, spacing;
9b76ede4	365
d4ecc83b HV	366	if (tea->cannot_read_data)
	367	return -ENOTTY;
	368	if (a->tuner \|\| a->wrap_around)
9b76ede4	369	return -EINVAL;
bc2b395c	370
617ade61 HV	371	if (file->f_flags & O_NONBLOCK)
	372	return -EWOULDBLOCK;
	373
fc488517 HG	374	if (a->rangelow \|\| a->rangehigh) {
	375	for (i = 0; i < ARRAY_SIZE(bands); i++) {
	376	if ((i == BAND_FM && tea->tea5759) \|\|
	377	(i == BAND_FM_JAPAN && !tea->tea5759) \|\|
	378	(i == BAND_AM && !tea->has_am))
	379	continue;
	380	if (bands[i].rangelow == a->rangelow &&
	381	bands[i].rangehigh == a->rangehigh)
	382	break;
	383	}
	384	if (i == ARRAY_SIZE(bands))
	385	return -EINVAL; /* No matching band found */
	386	if (i != tea->band) {
	387	tea->band = i;
	388	tea->freq = clamp(tea->freq, bands[i].rangelow,
	389	bands[i].rangehigh);
	390	snd_tea575x_set_freq(tea);
	391	}
	392	}
	393
	394	spacing = (tea->band == BAND_AM) ? 5 : 50; /* kHz */
	395
bc2b395c HV	396	/* clear the frequency, HW will fill it in */
bc2b395c HV	397	tea->val &= ~TEA575X_BIT_FREQ_MASK;
d4ecc83b	398	tea->val \|= TEA575X_BIT_SEARCH;
d4ecc83b HV	399	if (a->seek_upward)
d4ecc83b HV	400	tea->val \|= TEA575X_BIT_UPDOWN;
bc2b395c HV	401	else
bc2b395c HV	402	tea->val &= ~TEA575X_BIT_UPDOWN;
d4ecc83b	403	snd_tea575x_write(tea, tea->val);
bc2b395c	404	timeout = jiffies + msecs_to_jiffies(10000);
d4ecc83b	405	for (;;) {
bc2b395c HV	406	if (time_after(jiffies, timeout))
bc2b395c HV	407	break;
d4ecc83b HV	408	if (schedule_timeout_interruptible(msecs_to_jiffies(10))) {
	409	/* some signal arrived, stop search */
	410	tea->val &= ~TEA575X_BIT_SEARCH;
bc2b395c	411	snd_tea575x_set_freq(tea);
d4ecc83b HV	412	return -ERESTARTSYS;
d4ecc83b HV	413	}
bc2b395c HV	414	if (!(snd_tea575x_read(tea) & TEA575X_BIT_SEARCH)) {
	415	u32 freq;
	416
	417	/* Found a frequency, wait until it can be read */
	418	for (i = 0; i < 100; i++) {
	419	msleep(10);
	420	freq = snd_tea575x_get_freq(tea);
	421	if (freq) /* available */
	422	break;
	423	}
	424	if (freq == 0) /* shouldn't happen */
	425	break;
	426	/*
fc488517 HG	427	* if we moved by less than the spacing, or in the
fc488517 HG	428	* wrong direction, continue seeking
bc2b395c	429	*/
fc488517	430	if (abs(tea->freq - freq) < 16 * spacing \|\|
bc2b395c HV	431	(a->seek_upward && freq < tea->freq) \|\|
	432	(!a->seek_upward && freq > tea->freq)) {
	433	snd_tea575x_write(tea, tea->val);
	434	continue;
	435	}
	436	tea->freq = freq;
	437	tea->val &= ~TEA575X_BIT_SEARCH;
	438	return 0;
	439	}
d4ecc83b	440	}
bc2b395c HV	441	tea->val &= ~TEA575X_BIT_SEARCH;
bc2b395c HV	442	snd_tea575x_set_freq(tea);
54f6019b	443	return -ENODATA;
9b76ede4 MCC	444	}
9b76ede4 MCC	445
4522e825	446	static int tea575x_s_ctrl(struct v4l2_ctrl *ctrl)
9b76ede4	447	{
4522e825	448	struct snd_tea575x *tea = container_of(ctrl->handler, struct snd_tea575x, ctrl_handler);
9b76ede4 MCC	449
	450	switch (ctrl->id) {
	451	case V4L2_CID_AUDIO_MUTE:
4522e825 OZ	452	tea->mute = ctrl->val;
4522e825 OZ	453	snd_tea575x_set_freq(tea);
14219d06	454	return 0;
9b76ede4	455	}
9b76ede4	456
9b76ede4 MCC	457	return -EINVAL;
	458	}
	459
9b76ede4	460	static const struct v4l2_file_operations tea575x_fops = {
6a529c1a	461	.unlocked_ioctl = video_ioctl2,
d4ecc83b HV	462	.open = v4l2_fh_open,
	463	.release = v4l2_fh_release,
	464	.poll = v4l2_ctrl_poll,
9b76ede4 MCC	465	};
	466
	467	static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
	468	.vidioc_querycap = vidioc_querycap,
	469	.vidioc_g_tuner = vidioc_g_tuner,
	470	.vidioc_s_tuner = vidioc_s_tuner,
9b76ede4 MCC	471	.vidioc_g_frequency = vidioc_g_frequency,
9b76ede4 MCC	472	.vidioc_s_frequency = vidioc_s_frequency,
d4ecc83b	473	.vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
fc488517	474	.vidioc_enum_freq_bands = vidioc_enum_freq_bands,
d4ecc83b HV	475	.vidioc_log_status = v4l2_ctrl_log_status,
	476	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	477	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
9b76ede4 MCC	478	};
9b76ede4 MCC	479
d4ecc83b	480	static const struct video_device tea575x_radio = {
9b76ede4	481	.ioctl_ops = &tea575x_ioctl_ops,
d4ecc83b	482	.release = video_device_release_empty,
4522e825 OZ	483	};
	484
	485	static const struct v4l2_ctrl_ops tea575x_ctrl_ops = {
	486	.s_ctrl = tea575x_s_ctrl,
9b76ede4 MCC	487	};
9b76ede4 MCC	488
1da177e4	489
8fd79579 OZ	490	int snd_tea575x_hw_init(struct snd_tea575x *tea)
8fd79579 OZ	491	{
d4ecc83b	492	tea->mute = true;
14219d06	493
d4ecc83b HV	494	/* Not all devices can or know how to read the data back.
	495	Such devices can set cannot_read_data to true. */
	496	if (!tea->cannot_read_data) {
	497	snd_tea575x_write(tea, 0x55AA);
	498	if (snd_tea575x_read(tea) != 0x55AA)
	499	return -ENODEV;
	500	}
1da177e4	501
bc2b395c	502	tea->val = TEA575X_BIT_BAND_FM \| TEA575X_BIT_SEARCH_5_28;
9b76ede4	503	tea->freq = 90500 * 16; /* 90.5Mhz default */
4522e825	504	snd_tea575x_set_freq(tea);
9b76ede4	505
8fd79579 OZ	506	return 0;
	507	}
	508	EXPORT_SYMBOL(snd_tea575x_hw_init);
	509
	510	int snd_tea575x_init(struct snd_tea575x tea, struct module owner)
	511	{
	512	int retval = snd_tea575x_hw_init(tea);
	513
	514	if (retval)
	515	return retval;
	516
4522e825 OZ	517	tea->vd = tea575x_radio;
4522e825 OZ	518	video_set_drvdata(&tea->vd, tea);
6a529c1a	519	mutex_init(&tea->mutex);
d4ecc83b	520	strlcpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name));
6a529c1a	521	tea->vd.lock = &tea->mutex;
d4ecc83b	522	tea->vd.v4l2_dev = tea->v4l2_dev;
5daf53a6 HG	523	tea->fops = tea575x_fops;
	524	tea->fops.owner = owner;
	525	tea->vd.fops = &tea->fops;
d4ecc83b	526	set_bit(V4L2_FL_USE_FH_PRIO, &tea->vd.flags);
65397995 HV	527	/* disable hw_freq_seek if we can't use it */
65397995 HV	528	if (tea->cannot_read_data)
152a3a73	529	v4l2_disable_ioctl(&tea->vd, VIDIOC_S_HW_FREQ_SEEK);
1da177e4	530
3d0fe51c HG	531	if (!tea->cannot_mute) {
	532	tea->vd.ctrl_handler = &tea->ctrl_handler;
	533	v4l2_ctrl_handler_init(&tea->ctrl_handler, 1);
	534	v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops,
	535	V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
	536	retval = tea->ctrl_handler.error;
4522e825	537	if (retval) {
3d0fe51c	538	v4l2_err(tea->v4l2_dev, "can't initialize controls\n");
4522e825 OZ	539	v4l2_ctrl_handler_free(&tea->ctrl_handler);
	540	return retval;
	541	}
9b76ede4	542
3d0fe51c HG	543	if (tea->ext_init) {
	544	retval = tea->ext_init(tea);
	545	if (retval) {
	546	v4l2_ctrl_handler_free(&tea->ctrl_handler);
	547	return retval;
	548	}
	549	}
	550
	551	v4l2_ctrl_handler_setup(&tea->ctrl_handler);
	552	}
9b76ede4	553
d4ecc83b	554	retval = video_register_device(&tea->vd, VFL_TYPE_RADIO, tea->radio_nr);
9b76ede4	555	if (retval) {
d4ecc83b	556	v4l2_err(tea->v4l2_dev, "can't register video device!\n");
3d0fe51c	557	v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
14219d06	558	return retval;
9b76ede4	559	}
1da177e4	560
14219d06	561	return 0;
1da177e4 LT	562	}
1da177e4 LT	563
97f02e05	564	void snd_tea575x_exit(struct snd_tea575x *tea)
1da177e4	565	{
4522e825	566	video_unregister_device(&tea->vd);
3d0fe51c	567	v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
1da177e4 LT	568	}
	569
	570	static int __init alsa_tea575x_module_init(void)
	571	{
	572	return 0;
	573	}
4b29631d	574
1da177e4 LT	575	static void __exit alsa_tea575x_module_exit(void)
	576	{
	577	}
4b29631d	578
1da177e4 LT	579	module_init(alsa_tea575x_module_init)
	580	module_exit(alsa_tea575x_module_exit)
	581
	582	EXPORT_SYMBOL(snd_tea575x_init);
	583	EXPORT_SYMBOL(snd_tea575x_exit);
559c2009	584	EXPORT_SYMBOL(snd_tea575x_set_freq);