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Commit d7aab0bf authored by Hans de Goede's avatar Hans de Goede Committed by Mauro Carvalho Chehab
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[media] radio-tea5777: Add support for tuning AM 



This completes my work on the Griffin radioSHARK2 driver, let me use this
opportunity to thank Hisaaki Shibata for his generous donation of a
Griffin radioSHARK2 to me, which has made this driver possible.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 4fad5c47

drivers/media/radio/radio-tea5777.c

+149 −39
Original line number Diff line number Diff line
@@ -39,14 +39,12 @@ MODULE_AUTHOR("Hans de Goede <perex@perex.cz>"); 
MODULE_DESCRIPTION("Routines for control of TEA5777 Philips AM/FM radio tuner chips");

MODULE_LICENSE("GPL");



/* Fixed FM only band for now, will implement multi-band support when the

   VIDIOC_ENUM_FREQ_BANDS API is upstream */

#define TEA5777_FM_RANGELOW		(76000 * 16)

#define TEA5777_FM_RANGEHIGH		(108000 * 16)



#define TEA5777_FM_IF			150 /* kHz */

#define TEA5777_FM_FREQ_STEP		50  /* kHz */



#define TEA5777_AM_IF			21  /* kHz */

#define TEA5777_AM_FREQ_STEP		1   /* kHz */



/* Write reg, common bits */

#define TEA5777_W_MUTE_MASK		(1LL << 47)

#define TEA5777_W_MUTE_SHIFT		47
@@ -94,7 +92,7 @@ MODULE_LICENSE("GPL"); 
#define TEA5777_W_FM_PLL_SHIFT		32

#define TEA5777_W_FM_FREF_MASK		(0x03LL << 30)

#define TEA5777_W_FM_FREF_SHIFT		30

#define TEA5777_W_FM_FREF_VALUE		0 /* 50 kHz tune steps, 150 kHz IF */

#define TEA5777_W_FM_FREF_VALUE		0LL /* 50k steps, 150k IF */



#define TEA5777_W_FM_FORCEMONO_MASK	(1LL << 15)

#define TEA5777_W_FM_FORCEMONO_SHIFT	15
@@ -115,6 +113,8 @@ MODULE_LICENSE("GPL"); 
#define TEA5777_W_AM_AGCIF_SHIFT	32

#define TEA5777_W_AM_MWLW_MASK		(1LL << 31)

#define TEA5777_W_AM_MWLW_SHIFT		31

#define TEA5777_W_AM_LW			0LL

#define TEA5777_W_AM_MW			1LL

#define TEA5777_W_AM_LNA_MASK		(1LL << 30)

#define TEA5777_W_AM_LNA_SHIFT		30
@@ -147,9 +147,41 @@ MODULE_LICENSE("GPL"); 
#define TEA5777_R_FM_PLL_MASK		0x1fff

#define TEA5777_R_FM_PLL_SHIFT		0



enum { BAND_FM, 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 |

			      V4L2_TUNER_CAP_HWSEEK_BOUNDED |

			      V4L2_TUNER_CAP_HWSEEK_PROG_LIM,

		.rangelow   =  76000 * 16,

		.rangehigh  = 108000 * 16,

		.modulation = V4L2_BAND_MODULATION_FM,

	},

	{

		.type = V4L2_TUNER_RADIO,

		.index = 1,

		.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS |

			      V4L2_TUNER_CAP_HWSEEK_BOUNDED |

			      V4L2_TUNER_CAP_HWSEEK_PROG_LIM,

		.rangelow   =  530 * 16,

		.rangehigh  = 1710 * 16,

		.modulation = V4L2_BAND_MODULATION_AM,

	},

};



static u32 tea5777_freq_to_v4l2_freq(struct radio_tea5777 *tea, u32 freq)

{

	switch (tea->band) {

	case BAND_FM:

		return (freq * TEA5777_FM_FREQ_STEP + TEA5777_FM_IF) * 16;

	case BAND_AM:

		return (freq * TEA5777_AM_FREQ_STEP + TEA5777_AM_IF) * 16;

	}

	return 0; /* Never reached */

}



static int radio_tea5777_set_freq(struct radio_tea5777 *tea)
@@ -157,15 +189,40 @@ static int radio_tea5777_set_freq(struct radio_tea5777 *tea) 
	u32 freq;

	int res;



	freq = clamp_t(u32, tea->freq,

		       TEA5777_FM_RANGELOW, TEA5777_FM_RANGEHIGH);

	freq = clamp(tea->freq, bands[tea->band].rangelow,

				bands[tea->band].rangehigh);

	freq = (freq + 8) / 16; /* to kHz */



	switch (tea->band) {

	case BAND_FM:

		tea->write_reg &= ~TEA5777_W_AM_FM_MASK;

		freq = (freq - TEA5777_FM_IF) / TEA5777_FM_FREQ_STEP;



	tea->write_reg &= ~(TEA5777_W_FM_PLL_MASK | TEA5777_W_FM_FREF_MASK);

		tea->write_reg &= ~TEA5777_W_FM_PLL_MASK;

		tea->write_reg |= (u64)freq << TEA5777_W_FM_PLL_SHIFT;

	tea->write_reg |= TEA5777_W_FM_FREF_VALUE << TEA5777_W_FM_FREF_SHIFT;

		tea->write_reg &= ~TEA5777_W_FM_FREF_MASK;

		tea->write_reg |= TEA5777_W_FM_FREF_VALUE <<

				  TEA5777_W_FM_FREF_SHIFT;

		tea->write_reg &= ~TEA5777_W_FM_FORCEMONO_MASK;

		if (tea->audmode == V4L2_TUNER_MODE_MONO)

			tea->write_reg |= 1LL << TEA5777_W_FM_FORCEMONO_SHIFT;

		break;

	case BAND_AM:

		tea->write_reg &= ~TEA5777_W_AM_FM_MASK;

		tea->write_reg |= (1LL << TEA5777_W_AM_FM_SHIFT);

		freq = (freq - TEA5777_AM_IF) / TEA5777_AM_FREQ_STEP;

		tea->write_reg &= ~TEA5777_W_AM_PLL_MASK;

		tea->write_reg |= (u64)freq << TEA5777_W_AM_PLL_SHIFT;

		tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;

		tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;

		tea->write_reg &= ~TEA5777_W_AM_MWLW_MASK;

		tea->write_reg |= TEA5777_W_AM_MW << TEA5777_W_AM_MWLW_SHIFT;

		tea->write_reg &= ~TEA5777_W_AM_LNA_MASK;

		tea->write_reg |= 1LL << TEA5777_W_AM_LNA_SHIFT;

		tea->write_reg &= ~TEA5777_W_AM_PEAK_MASK;

		tea->write_reg |= 1LL << TEA5777_W_AM_PEAK_SHIFT;

		tea->write_reg &= ~TEA5777_W_AM_CALLIGN_MASK;

		break;

	}



	res = tea->ops->write_reg(tea, tea->write_reg);

	if (res)
@@ -223,6 +280,19 @@ static int vidioc_querycap(struct file *file, void *priv, 
	return 0;

}



static int vidioc_enum_freq_bands(struct file *file, void *priv,

					 struct v4l2_frequency_band *band)

{

	struct radio_tea5777 *tea = video_drvdata(file);



	if (band->tuner != 0 || band->index >= ARRAY_SIZE(bands) ||

	    (!tea->has_am && band->index == BAND_AM))

		return -EINVAL;



	*band = bands[band->index];

	return 0;

}



static int vidioc_g_tuner(struct file *file, void *priv,

					struct v4l2_tuner *v)

{
@@ -243,13 +313,18 @@ static int vidioc_g_tuner(struct file *file, void *priv, 
		strlcpy(v->name, "FM", sizeof(v->name));

	v->type = V4L2_TUNER_RADIO;

	v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |

			V4L2_TUNER_CAP_HWSEEK_BOUNDED;

	v->rangelow   = TEA5777_FM_RANGELOW;

	v->rangehigh  = TEA5777_FM_RANGEHIGH;

	v->rxsubchans = (tea->read_reg & TEA5777_R_FM_STEREO_MASK) ?

			V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;

	v->audmode = (tea->write_reg & TEA5777_W_FM_FORCEMONO_MASK) ?

		V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO;

			V4L2_TUNER_CAP_FREQ_BANDS |

			V4L2_TUNER_CAP_HWSEEK_BOUNDED |

			V4L2_TUNER_CAP_HWSEEK_PROG_LIM;

	v->rangelow   = tea->has_am ? bands[BAND_AM].rangelow :

				      bands[BAND_FM].rangelow;

	v->rangehigh  = bands[BAND_FM].rangehigh;

	if (tea->band == BAND_FM &&

			(tea->read_reg & TEA5777_R_FM_STEREO_MASK))

		v->rxsubchans = V4L2_TUNER_SUB_STEREO;

	else

		v->rxsubchans = V4L2_TUNER_SUB_MONO;

	v->audmode = tea->audmode;

	/* shift - 12 to convert 4-bits (0-15) scale to 16-bits (0-65535) */

	v->signal = (tea->read_reg & TEA5777_R_LEVEL_MASK) >>

		    (TEA5777_R_LEVEL_SHIFT - 12);
@@ -264,16 +339,20 @@ static int vidioc_s_tuner(struct file *file, void *priv, 
					struct v4l2_tuner *v)

{

	struct radio_tea5777 *tea = video_drvdata(file);

	u32 orig_audmode = tea->audmode;



	if (v->index)

		return -EINVAL;



	if (v->audmode == V4L2_TUNER_MODE_MONO)

		tea->write_reg |= TEA5777_W_FM_FORCEMONO_MASK;

	else

		tea->write_reg &= ~TEA5777_W_FM_FORCEMONO_MASK;

	if (v->audmode > V4L2_TUNER_MODE_STEREO)

		v->audmode = V4L2_TUNER_MODE_STEREO;



	tea->audmode = v->audmode;



	if (tea->audmode != orig_audmode && tea->band == BAND_FM)

		return radio_tea5777_set_freq(tea);



	return 0;

}



static int vidioc_g_frequency(struct file *file, void *priv,
@@ -296,6 +375,11 @@ static int vidioc_s_frequency(struct file *file, void *priv, 
	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)

		return -EINVAL;



	if (tea->has_am && f->frequency < (20000 * 16))

		tea->band = BAND_AM;

	else

		tea->band = BAND_FM;



	tea->freq = f->frequency;

	return radio_tea5777_set_freq(tea);

}
@@ -304,32 +388,56 @@ static int vidioc_s_hw_freq_seek(struct file *file, void *fh, 
					struct v4l2_hw_freq_seek *a)

{

	struct radio_tea5777 *tea = video_drvdata(file);

	u32 orig_freq = tea->freq;

	unsigned long timeout;

	int res, spacing = 200 * 16; /* 200 kHz */

	/* These are fixed *for now* */

	const u32 seek_rangelow  = TEA5777_FM_RANGELOW;

	const u32 seek_rangehigh = TEA5777_FM_RANGEHIGH;

	int i, res, spacing;

	u32 orig_freq;



	if (a->tuner || a->wrap_around)

		return -EINVAL;



	if (a->rangelow || a->rangehigh) {

		for (i = 0; i < ARRAY_SIZE(bands); i++) {

			if (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 */



		tea->band = i;

		if (tea->freq < a->rangelow || tea->freq > a->rangehigh) {

			tea->freq = clamp(tea->freq, a->rangelow,

						     a->rangehigh);

			res = radio_tea5777_set_freq(tea);

			if (res)

				return res;

		}

	} else {

		a->rangelow  = bands[tea->band].rangelow;

		a->rangehigh = bands[tea->band].rangehigh;

	}



	spacing   = (tea->band == BAND_AM) ? (5 * 16) : (200 * 16); /* kHz */

	orig_freq = tea->freq;



	tea->write_reg |= TEA5777_W_PROGBLIM_MASK;

	if (seek_rangelow != tea->seek_rangelow) {

	if (tea->seek_rangelow != a->rangelow) {

		tea->write_reg &= ~TEA5777_W_UPDWN_MASK;

		tea->freq = seek_rangelow;

		tea->freq = a->rangelow;

		res = radio_tea5777_set_freq(tea);

		if (res)

			goto leave;

		tea->seek_rangelow = tea->freq;

		tea->seek_rangelow = a->rangelow;

	}

	if (seek_rangehigh != tea->seek_rangehigh) {

	if (tea->seek_rangehigh != a->rangehigh) {

		tea->write_reg |= TEA5777_W_UPDWN_MASK;

		tea->freq = seek_rangehigh;

		tea->freq = a->rangehigh;

		res = radio_tea5777_set_freq(tea);

		if (res)

			goto leave;

		tea->seek_rangehigh = tea->freq;

		tea->seek_rangehigh = a->rangehigh;

	}

	tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
@@ -417,6 +525,7 @@ static const struct v4l2_ioctl_ops tea575x_ioctl_ops = { 
	.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,
@@ -439,8 +548,9 @@ int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner) 
			 (1LL << TEA5777_W_IFW_SHIFT) |

			 (1LL << TEA5777_W_INTEXT_SHIFT) |

			 (1LL << TEA5777_W_CHP0_SHIFT) |

			 (2LL << TEA5777_W_SLEV_SHIFT);

			 (1LL << TEA5777_W_SLEV_SHIFT);

	tea->freq = 90500 * 16;	/* 90.5Mhz default */

	tea->audmode = V4L2_TUNER_MODE_STEREO;

	res = radio_tea5777_set_freq(tea);

	if (res) {

		v4l2_err(tea->v4l2_dev, "can't set initial freq (%d)\n", res);

drivers/media/radio/radio-tea5777.h

+2 −0
Original line number Diff line number Diff line
@@ -68,7 +68,9 @@ struct radio_tea5777 { 
	bool has_am;			/* Device can tune to AM freqs */

	bool write_before_read;		/* must write before read quirk */

	bool needs_write;		/* for write before read quirk */

	u32 band;			/* current band */

	u32 freq;			/* current frequency */

	u32 audmode;			/* last set audmode */

	u32 seek_rangelow;		/* current hwseek limits */

	u32 seek_rangehigh;

	u32 read_reg;