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Andres Salomonb5ccc572008-11-06 16:53:26 -05001/*
2 * OLPC XO-1 additional sound features
3 *
4 * Copyright © 2006 Jaya Kumar <jayakumar.lkml@gmail.com>
5 * Copyright © 2007-2008 Andres Salomon <dilinger@debian.org>
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 */
Jaya Kumar57d4bf62008-11-06 16:43:34 -050012#include <sound/core.h>
13#include <sound/info.h>
14#include <sound/control.h>
15#include <sound/ac97_codec.h>
Andres Salomon3c554942009-12-14 18:00:36 -080016#include <linux/gpio.h>
Jordan Crousec8974be2008-11-06 16:43:53 -050017
18#include <asm/olpc.h>
Jaya Kumar57d4bf62008-11-06 16:43:34 -050019#include "cs5535audio.h"
20
Andres Salomon3c554942009-12-14 18:00:36 -080021#define DRV_NAME "cs5535audio-olpc"
22
Andres Salomond6276b72008-11-06 16:49:38 -050023/*
24 * OLPC has an additional feature on top of the regular AD1888 codec features.
25 * It has an Analog Input mode that is switched into (after disabling the
26 * High Pass Filter) via GPIO. It is supported on B2 and later models.
27 */
28void olpc_analog_input(struct snd_ac97 *ac97, int on)
29{
30 int err;
31
Andres Salomon0fb497f2008-11-06 16:53:34 -050032 if (!machine_is_olpc())
33 return;
34
Andres Salomond6276b72008-11-06 16:49:38 -050035 /* update the High Pass Filter (via AC97_AD_TEST2) */
36 err = snd_ac97_update_bits(ac97, AC97_AD_TEST2,
37 1 << AC97_AD_HPFD_SHIFT, on << AC97_AD_HPFD_SHIFT);
38 if (err < 0) {
39 snd_printk(KERN_ERR "setting High Pass Filter - %d\n", err);
40 return;
41 }
42
43 /* set Analog Input through GPIO */
Andres Salomon3c554942009-12-14 18:00:36 -080044 gpio_set_value(OLPC_GPIO_MIC_AC, on);
Andres Salomond6276b72008-11-06 16:49:38 -050045}
Jaya Kumar57d4bf62008-11-06 16:43:34 -050046
Andres Salomonbf1e5272008-11-06 16:53:03 -050047/*
48 * OLPC XO-1's V_REFOUT is a mic bias enable.
49 */
50void olpc_mic_bias(struct snd_ac97 *ac97, int on)
51{
52 int err;
53
Andres Salomon0fb497f2008-11-06 16:53:34 -050054 if (!machine_is_olpc())
55 return;
56
Andres Salomonbf1e5272008-11-06 16:53:03 -050057 on = on ? 0 : 1;
58 err = snd_ac97_update_bits(ac97, AC97_AD_MISC,
59 1 << AC97_AD_VREFD_SHIFT, on << AC97_AD_VREFD_SHIFT);
60 if (err < 0)
61 snd_printk(KERN_ERR "setting MIC Bias - %d\n", err);
62}
63
Andres Salomon466ae30552008-11-06 16:49:46 -050064static int olpc_dc_info(struct snd_kcontrol *kctl,
65 struct snd_ctl_elem_info *uinfo)
Jaya Kumar57d4bf62008-11-06 16:43:34 -050066{
67 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
68 uinfo->count = 1;
69 uinfo->value.integer.min = 0;
70 uinfo->value.integer.max = 1;
71 return 0;
72}
73
Andres Salomon466ae30552008-11-06 16:49:46 -050074static int olpc_dc_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
Jaya Kumar57d4bf62008-11-06 16:43:34 -050075{
Andres Salomon3c554942009-12-14 18:00:36 -080076 v->value.integer.value[0] = gpio_get_value(OLPC_GPIO_MIC_AC);
Jaya Kumar57d4bf62008-11-06 16:43:34 -050077 return 0;
78}
79
Andres Salomon466ae30552008-11-06 16:49:46 -050080static int olpc_dc_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
Jaya Kumar57d4bf62008-11-06 16:43:34 -050081{
Andres Salomon466ae30552008-11-06 16:49:46 -050082 struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
Jaya Kumar57d4bf62008-11-06 16:43:34 -050083
Andres Salomon466ae30552008-11-06 16:49:46 -050084 olpc_analog_input(cs5535au->ac97, v->value.integer.value[0]);
Jaya Kumar57d4bf62008-11-06 16:43:34 -050085 return 1;
86}
87
Andres Salomonbf1e5272008-11-06 16:53:03 -050088static int olpc_mic_info(struct snd_kcontrol *kctl,
89 struct snd_ctl_elem_info *uinfo)
90{
91 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
92 uinfo->count = 1;
93 uinfo->value.integer.min = 0;
94 uinfo->value.integer.max = 1;
95 return 0;
96}
97
98static int olpc_mic_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
99{
100 struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
101 struct snd_ac97 *ac97 = cs5535au->ac97;
102 int i;
103
104 i = (snd_ac97_read(ac97, AC97_AD_MISC) >> AC97_AD_VREFD_SHIFT) & 0x1;
105 v->value.integer.value[0] = i ? 0 : 1;
106 return 0;
107}
108
109static int olpc_mic_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
110{
111 struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
112
113 olpc_mic_bias(cs5535au->ac97, v->value.integer.value[0]);
114 return 1;
115}
116
117static struct snd_kcontrol_new olpc_cs5535audio_ctls[] __devinitdata = {
Jaya Kumar57d4bf62008-11-06 16:43:34 -0500118{
119 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
Andres Salomon466ae30552008-11-06 16:49:46 -0500120 .name = "DC Mode Enable",
121 .info = olpc_dc_info,
122 .get = olpc_dc_get,
123 .put = olpc_dc_put,
Andres Salomonb5ccc572008-11-06 16:53:26 -0500124 .private_value = 0,
Andres Salomonbf1e5272008-11-06 16:53:03 -0500125},
126{
127 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
128 .name = "MIC Bias Enable",
129 .info = olpc_mic_info,
130 .get = olpc_mic_get,
131 .put = olpc_mic_put,
132 .private_value = 0,
133},
Jaya Kumar57d4bf62008-11-06 16:43:34 -0500134};
135
Andres Salomon3556d182008-11-06 16:44:08 -0500136void __devinit olpc_prequirks(struct snd_card *card,
137 struct snd_ac97_template *ac97)
138{
139 if (!machine_is_olpc())
140 return;
141
142 /* invert EAPD if on an OLPC B3 or higher */
143 if (olpc_board_at_least(olpc_board_pre(0xb3)))
144 ac97->scaps |= AC97_SCAP_INV_EAPD;
145}
146
Jaya Kumar57d4bf62008-11-06 16:43:34 -0500147int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
148{
Andres Salomon466ae30552008-11-06 16:49:46 -0500149 struct snd_ctl_elem_id elem;
Andres Salomonbf1e5272008-11-06 16:53:03 -0500150 int i, err;
Andres Salomon466ae30552008-11-06 16:49:46 -0500151
Jordan Crousec8974be2008-11-06 16:43:53 -0500152 if (!machine_is_olpc())
153 return 0;
154
Andres Salomon3c554942009-12-14 18:00:36 -0800155 if (gpio_request(OLPC_GPIO_MIC_AC, DRV_NAME)) {
156 printk(KERN_ERR DRV_NAME ": unable to allocate MIC GPIO\n");
157 return -EIO;
158 }
159 gpio_direction_output(OLPC_GPIO_MIC_AC, 0);
160
Andres Salomon466ae30552008-11-06 16:49:46 -0500161 /* drop the original AD1888 HPF control */
162 memset(&elem, 0, sizeof(elem));
163 elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
164 strncpy(elem.name, "High Pass Filter Enable", sizeof(elem.name));
165 snd_ctl_remove_id(card, &elem);
166
Andres Salomonbf1e5272008-11-06 16:53:03 -0500167 /* drop the original V_REFOUT control */
168 memset(&elem, 0, sizeof(elem));
169 elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
170 strncpy(elem.name, "V_REFOUT Enable", sizeof(elem.name));
171 snd_ctl_remove_id(card, &elem);
172
173 /* add the OLPC-specific controls */
174 for (i = 0; i < ARRAY_SIZE(olpc_cs5535audio_ctls); i++) {
175 err = snd_ctl_add(card, snd_ctl_new1(&olpc_cs5535audio_ctls[i],
176 ac97->private_data));
Andres Salomon3c554942009-12-14 18:00:36 -0800177 if (err < 0) {
178 gpio_free(OLPC_GPIO_MIC_AC);
Andres Salomonbf1e5272008-11-06 16:53:03 -0500179 return err;
Andres Salomon3c554942009-12-14 18:00:36 -0800180 }
Andres Salomonbf1e5272008-11-06 16:53:03 -0500181 }
182
Andres Salomonc8f0eee2008-11-06 16:53:19 -0500183 /* turn off the mic by default */
184 olpc_mic_bias(ac97, 0);
Andres Salomonbf1e5272008-11-06 16:53:03 -0500185 return 0;
Jaya Kumar57d4bf62008-11-06 16:43:34 -0500186}
Andres Salomon3c554942009-12-14 18:00:36 -0800187
188void __devexit olpc_quirks_cleanup(void)
189{
190 gpio_free(OLPC_GPIO_MIC_AC);
191}