[linux-block.git] / sound / pci / cs5535audio / cs5535audio_olpc.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * OLPC XO-1 additional sound features
 *
 * Copyright © 2006  Jaya Kumar <jayakumar.lkml@gmail.com>
 * Copyright © 2007-2008  Andres Salomon <dilinger@debian.org>
 */
#include <sound/core.h>
#include <sound/info.h>
#include <sound/control.h>
#include <sound/ac97_codec.h>
#include <linux/gpio.h>

#include <asm/olpc.h>
#include "cs5535audio.h"

#define DRV_NAME "cs5535audio-olpc"

/*
 * OLPC has an additional feature on top of the regular AD1888 codec features.
 * It has an Analog Input mode that is switched into (after disabling the
 * High Pass Filter) via GPIO.  It is supported on B2 and later models.
 */
void olpc_analog_input(struct snd_ac97 *ac97, int on)
{
	int err;

	if (!machine_is_olpc())
		return;

	/* update the High Pass Filter (via AC97_AD_TEST2) */
	err = snd_ac97_update_bits(ac97, AC97_AD_TEST2,
			1 << AC97_AD_HPFD_SHIFT, on << AC97_AD_HPFD_SHIFT);
	if (err < 0) {
		dev_err(ac97->bus->card->dev,
			"setting High Pass Filter - %d\n", err);
		return;
	}

	/* set Analog Input through GPIO */
	gpio_set_value(OLPC_GPIO_MIC_AC, on);
}

/*
 * OLPC XO-1's V_REFOUT is a mic bias enable.
 */
void olpc_mic_bias(struct snd_ac97 *ac97, int on)
{
	int err;

	if (!machine_is_olpc())
		return;

	on = on ? 0 : 1;
	err = snd_ac97_update_bits(ac97, AC97_AD_MISC,
			1 << AC97_AD_VREFD_SHIFT, on << AC97_AD_VREFD_SHIFT);
	if (err < 0)
		dev_err(ac97->bus->card->dev, "setting MIC Bias - %d\n", err);
}

static int olpc_dc_info(struct snd_kcontrol *kctl,
		struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}

static int olpc_dc_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
{
	v->value.integer.value[0] = gpio_get_value(OLPC_GPIO_MIC_AC);
	return 0;
}

static int olpc_dc_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
{
	struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);

	olpc_analog_input(cs5535au->ac97, v->value.integer.value[0]);
	return 1;
}

static int olpc_mic_info(struct snd_kcontrol *kctl,
		struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}

static int olpc_mic_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
{
	struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
	struct snd_ac97 *ac97 = cs5535au->ac97;
	int i;

	i = (snd_ac97_read(ac97, AC97_AD_MISC) >> AC97_AD_VREFD_SHIFT) & 0x1;
	v->value.integer.value[0] = i ? 0 : 1;
	return 0;
}

static int olpc_mic_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
{
	struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);

	olpc_mic_bias(cs5535au->ac97, v->value.integer.value[0]);
	return 1;
}

static struct snd_kcontrol_new olpc_cs5535audio_ctls[] = {
{
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "DC Mode Enable",
	.info = olpc_dc_info,
	.get = olpc_dc_get,
	.put = olpc_dc_put,
	.private_value = 0,
},
{
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "MIC Bias Enable",
	.info = olpc_mic_info,
	.get = olpc_mic_get,
	.put = olpc_mic_put,
	.private_value = 0,
},
};

void olpc_prequirks(struct snd_card *card,
		    struct snd_ac97_template *ac97)
{
	if (!machine_is_olpc())
		return;

	/* invert EAPD if on an OLPC B3 or higher */
	if (olpc_board_at_least(olpc_board_pre(0xb3)))
		ac97->scaps |= AC97_SCAP_INV_EAPD;
}

int olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
{
	struct snd_ctl_elem_id elem;
	int i, err;

	if (!machine_is_olpc())
		return 0;

	if (gpio_request(OLPC_GPIO_MIC_AC, DRV_NAME)) {
		dev_err(card->dev, "unable to allocate MIC GPIO\n");
		return -EIO;
	}
	gpio_direction_output(OLPC_GPIO_MIC_AC, 0);

	/* drop the original AD1888 HPF control */
	memset(&elem, 0, sizeof(elem));
	elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	strlcpy(elem.name, "High Pass Filter Enable", sizeof(elem.name));
	snd_ctl_remove_id(card, &elem);

	/* drop the original V_REFOUT control */
	memset(&elem, 0, sizeof(elem));
	elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	strlcpy(elem.name, "V_REFOUT Enable", sizeof(elem.name));
	snd_ctl_remove_id(card, &elem);

	/* add the OLPC-specific controls */
	for (i = 0; i < ARRAY_SIZE(olpc_cs5535audio_ctls); i++) {
		err = snd_ctl_add(card, snd_ctl_new1(&olpc_cs5535audio_ctls[i],
				ac97->private_data));
		if (err < 0) {
			gpio_free(OLPC_GPIO_MIC_AC);
			return err;
		}
	}

	/* turn off the mic by default */
	olpc_mic_bias(ac97, 0);
	return 0;
}

void olpc_quirks_cleanup(void)
{
	gpio_free(OLPC_GPIO_MIC_AC);
}
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
b5ccc57b AS	2	/*
	3	* OLPC XO-1 additional sound features
	4	*
	5	* Copyright © 2006 Jaya Kumar <jayakumar.lkml@gmail.com>
	6	* Copyright © 2007-2008 Andres Salomon <dilinger@debian.org>
b5ccc57b	7	*/
57d4bf6d JK	8	#include <sound/core.h>
	9	#include <sound/info.h>
	10	#include <sound/control.h>
	11	#include <sound/ac97_codec.h>
3c554946	12	#include <linux/gpio.h>
c8974be5 JC	13
c8974be5 JC	14	#include <asm/olpc.h>
57d4bf6d JK	15	#include "cs5535audio.h"
57d4bf6d JK	16
3c554946 AS	17	#define DRV_NAME "cs5535audio-olpc"
3c554946 AS	18
d6276b78 AS	19	/*
	20	* OLPC has an additional feature on top of the regular AD1888 codec features.
	21	* It has an Analog Input mode that is switched into (after disabling the
	22	* High Pass Filter) via GPIO. It is supported on B2 and later models.
	23	*/
	24	void olpc_analog_input(struct snd_ac97 *ac97, int on)
	25	{
	26	int err;
	27
0fb497f5 AS	28	if (!machine_is_olpc())
	29	return;
	30
d6276b78 AS	31	/* update the High Pass Filter (via AC97_AD_TEST2) */
	32	err = snd_ac97_update_bits(ac97, AC97_AD_TEST2,
	33	1 << AC97_AD_HPFD_SHIFT, on << AC97_AD_HPFD_SHIFT);
	34	if (err < 0) {
00980aa9 TI	35	dev_err(ac97->bus->card->dev,
00980aa9 TI	36	"setting High Pass Filter - %d\n", err);
d6276b78 AS	37	return;
	38	}
	39
	40	/* set Analog Input through GPIO */
3c554946	41	gpio_set_value(OLPC_GPIO_MIC_AC, on);
d6276b78	42	}
57d4bf6d	43
bf1e5278 AS	44	/*
	45	* OLPC XO-1's V_REFOUT is a mic bias enable.
	46	*/
	47	void olpc_mic_bias(struct snd_ac97 *ac97, int on)
	48	{
	49	int err;
	50
0fb497f5 AS	51	if (!machine_is_olpc())
	52	return;
	53
bf1e5278 AS	54	on = on ? 0 : 1;
	55	err = snd_ac97_update_bits(ac97, AC97_AD_MISC,
	56	1 << AC97_AD_VREFD_SHIFT, on << AC97_AD_VREFD_SHIFT);
	57	if (err < 0)
00980aa9	58	dev_err(ac97->bus->card->dev, "setting MIC Bias - %d\n", err);
bf1e5278 AS	59	}
bf1e5278 AS	60
466ae305 AS	61	static int olpc_dc_info(struct snd_kcontrol *kctl,
466ae305 AS	62	struct snd_ctl_elem_info *uinfo)
57d4bf6d JK	63	{
	64	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	65	uinfo->count = 1;
	66	uinfo->value.integer.min = 0;
	67	uinfo->value.integer.max = 1;
	68	return 0;
	69	}
	70
466ae305	71	static int olpc_dc_get(struct snd_kcontrol kctl, struct snd_ctl_elem_value v)
57d4bf6d	72	{
3c554946	73	v->value.integer.value[0] = gpio_get_value(OLPC_GPIO_MIC_AC);
57d4bf6d JK	74	return 0;
	75	}
	76
466ae305	77	static int olpc_dc_put(struct snd_kcontrol kctl, struct snd_ctl_elem_value v)
57d4bf6d	78	{
466ae305	79	struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
57d4bf6d	80
466ae305	81	olpc_analog_input(cs5535au->ac97, v->value.integer.value[0]);
57d4bf6d JK	82	return 1;
	83	}
	84
bf1e5278 AS	85	static int olpc_mic_info(struct snd_kcontrol *kctl,
	86	struct snd_ctl_elem_info *uinfo)
	87	{
	88	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	89	uinfo->count = 1;
	90	uinfo->value.integer.min = 0;
	91	uinfo->value.integer.max = 1;
	92	return 0;
	93	}
	94
	95	static int olpc_mic_get(struct snd_kcontrol kctl, struct snd_ctl_elem_value v)
	96	{
	97	struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
	98	struct snd_ac97 *ac97 = cs5535au->ac97;
	99	int i;
	100
	101	i = (snd_ac97_read(ac97, AC97_AD_MISC) >> AC97_AD_VREFD_SHIFT) & 0x1;
	102	v->value.integer.value[0] = i ? 0 : 1;
	103	return 0;
	104	}
	105
	106	static int olpc_mic_put(struct snd_kcontrol kctl, struct snd_ctl_elem_value v)
	107	{
	108	struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
	109
	110	olpc_mic_bias(cs5535au->ac97, v->value.integer.value[0]);
	111	return 1;
	112	}
	113
e23e7a14	114	static struct snd_kcontrol_new olpc_cs5535audio_ctls[] = {
57d4bf6d JK	115	{
57d4bf6d JK	116	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
466ae305 AS	117	.name = "DC Mode Enable",
	118	.info = olpc_dc_info,
	119	.get = olpc_dc_get,
	120	.put = olpc_dc_put,
b5ccc57b	121	.private_value = 0,
bf1e5278 AS	122	},
	123	{
	124	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	125	.name = "MIC Bias Enable",
	126	.info = olpc_mic_info,
	127	.get = olpc_mic_get,
	128	.put = olpc_mic_put,
	129	.private_value = 0,
	130	},
57d4bf6d JK	131	};
57d4bf6d JK	132
e23e7a14 BP	133	void olpc_prequirks(struct snd_card *card,
e23e7a14 BP	134	struct snd_ac97_template *ac97)
3556d184 AS	135	{
	136	if (!machine_is_olpc())
	137	return;
	138
	139	/* invert EAPD if on an OLPC B3 or higher */
	140	if (olpc_board_at_least(olpc_board_pre(0xb3)))
	141	ac97->scaps \|= AC97_SCAP_INV_EAPD;
	142	}
	143
e23e7a14	144	int olpc_quirks(struct snd_card card, struct snd_ac97 ac97)
57d4bf6d	145	{
466ae305	146	struct snd_ctl_elem_id elem;
bf1e5278	147	int i, err;
466ae305	148
c8974be5 JC	149	if (!machine_is_olpc())
	150	return 0;
	151
3c554946	152	if (gpio_request(OLPC_GPIO_MIC_AC, DRV_NAME)) {
00980aa9	153	dev_err(card->dev, "unable to allocate MIC GPIO\n");
3c554946 AS	154	return -EIO;
	155	}
	156	gpio_direction_output(OLPC_GPIO_MIC_AC, 0);
	157
466ae305 AS	158	/* drop the original AD1888 HPF control */
	159	memset(&elem, 0, sizeof(elem));
	160	elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
57a4451d	161	strlcpy(elem.name, "High Pass Filter Enable", sizeof(elem.name));
466ae305 AS	162	snd_ctl_remove_id(card, &elem);
466ae305 AS	163
bf1e5278 AS	164	/* drop the original V_REFOUT control */
	165	memset(&elem, 0, sizeof(elem));
	166	elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
57a4451d	167	strlcpy(elem.name, "V_REFOUT Enable", sizeof(elem.name));
bf1e5278 AS	168	snd_ctl_remove_id(card, &elem);
	169
	170	/* add the OLPC-specific controls */
	171	for (i = 0; i < ARRAY_SIZE(olpc_cs5535audio_ctls); i++) {
	172	err = snd_ctl_add(card, snd_ctl_new1(&olpc_cs5535audio_ctls[i],
	173	ac97->private_data));
3c554946 AS	174	if (err < 0) {
3c554946 AS	175	gpio_free(OLPC_GPIO_MIC_AC);
bf1e5278	176	return err;
3c554946	177	}
bf1e5278 AS	178	}
bf1e5278 AS	179
c8f0eeeb AS	180	/* turn off the mic by default */
c8f0eeeb AS	181	olpc_mic_bias(ac97, 0);
bf1e5278	182	return 0;
57d4bf6d	183	}
3c554946	184
e23e7a14	185	void olpc_quirks_cleanup(void)
3c554946 AS	186	{
	187	gpio_free(OLPC_GPIO_MIC_AC);
	188	}