| 1 | /* |
| 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 | */ |
| 12 | #include <sound/core.h> |
| 13 | #include <sound/info.h> |
| 14 | #include <sound/control.h> |
| 15 | #include <sound/ac97_codec.h> |
| 16 | #include <linux/gpio.h> |
| 17 | |
| 18 | #include <asm/olpc.h> |
| 19 | #include "cs5535audio.h" |
| 20 | |
| 21 | #define DRV_NAME "cs5535audio-olpc" |
| 22 | |
| 23 | /* |
| 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 | */ |
| 28 | void olpc_analog_input(struct snd_ac97 *ac97, int on) |
| 29 | { |
| 30 | int err; |
| 31 | |
| 32 | if (!machine_is_olpc()) |
| 33 | return; |
| 34 | |
| 35 | /* 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 | dev_err(ac97->bus->card->dev, |
| 40 | "setting High Pass Filter - %d\n", err); |
| 41 | return; |
| 42 | } |
| 43 | |
| 44 | /* set Analog Input through GPIO */ |
| 45 | gpio_set_value(OLPC_GPIO_MIC_AC, on); |
| 46 | } |
| 47 | |
| 48 | /* |
| 49 | * OLPC XO-1's V_REFOUT is a mic bias enable. |
| 50 | */ |
| 51 | void olpc_mic_bias(struct snd_ac97 *ac97, int on) |
| 52 | { |
| 53 | int err; |
| 54 | |
| 55 | if (!machine_is_olpc()) |
| 56 | return; |
| 57 | |
| 58 | on = on ? 0 : 1; |
| 59 | err = snd_ac97_update_bits(ac97, AC97_AD_MISC, |
| 60 | 1 << AC97_AD_VREFD_SHIFT, on << AC97_AD_VREFD_SHIFT); |
| 61 | if (err < 0) |
| 62 | dev_err(ac97->bus->card->dev, "setting MIC Bias - %d\n", err); |
| 63 | } |
| 64 | |
| 65 | static int olpc_dc_info(struct snd_kcontrol *kctl, |
| 66 | struct snd_ctl_elem_info *uinfo) |
| 67 | { |
| 68 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; |
| 69 | uinfo->count = 1; |
| 70 | uinfo->value.integer.min = 0; |
| 71 | uinfo->value.integer.max = 1; |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | static int olpc_dc_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v) |
| 76 | { |
| 77 | v->value.integer.value[0] = gpio_get_value(OLPC_GPIO_MIC_AC); |
| 78 | return 0; |
| 79 | } |
| 80 | |
| 81 | static int olpc_dc_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v) |
| 82 | { |
| 83 | struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl); |
| 84 | |
| 85 | olpc_analog_input(cs5535au->ac97, v->value.integer.value[0]); |
| 86 | return 1; |
| 87 | } |
| 88 | |
| 89 | static int olpc_mic_info(struct snd_kcontrol *kctl, |
| 90 | struct snd_ctl_elem_info *uinfo) |
| 91 | { |
| 92 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; |
| 93 | uinfo->count = 1; |
| 94 | uinfo->value.integer.min = 0; |
| 95 | uinfo->value.integer.max = 1; |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static int olpc_mic_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v) |
| 100 | { |
| 101 | struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl); |
| 102 | struct snd_ac97 *ac97 = cs5535au->ac97; |
| 103 | int i; |
| 104 | |
| 105 | i = (snd_ac97_read(ac97, AC97_AD_MISC) >> AC97_AD_VREFD_SHIFT) & 0x1; |
| 106 | v->value.integer.value[0] = i ? 0 : 1; |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | static int olpc_mic_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v) |
| 111 | { |
| 112 | struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl); |
| 113 | |
| 114 | olpc_mic_bias(cs5535au->ac97, v->value.integer.value[0]); |
| 115 | return 1; |
| 116 | } |
| 117 | |
| 118 | static struct snd_kcontrol_new olpc_cs5535audio_ctls[] = { |
| 119 | { |
| 120 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
| 121 | .name = "DC Mode Enable", |
| 122 | .info = olpc_dc_info, |
| 123 | .get = olpc_dc_get, |
| 124 | .put = olpc_dc_put, |
| 125 | .private_value = 0, |
| 126 | }, |
| 127 | { |
| 128 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
| 129 | .name = "MIC Bias Enable", |
| 130 | .info = olpc_mic_info, |
| 131 | .get = olpc_mic_get, |
| 132 | .put = olpc_mic_put, |
| 133 | .private_value = 0, |
| 134 | }, |
| 135 | }; |
| 136 | |
| 137 | void olpc_prequirks(struct snd_card *card, |
| 138 | struct snd_ac97_template *ac97) |
| 139 | { |
| 140 | if (!machine_is_olpc()) |
| 141 | return; |
| 142 | |
| 143 | /* invert EAPD if on an OLPC B3 or higher */ |
| 144 | if (olpc_board_at_least(olpc_board_pre(0xb3))) |
| 145 | ac97->scaps |= AC97_SCAP_INV_EAPD; |
| 146 | } |
| 147 | |
| 148 | int olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97) |
| 149 | { |
| 150 | struct snd_ctl_elem_id elem; |
| 151 | int i, err; |
| 152 | |
| 153 | if (!machine_is_olpc()) |
| 154 | return 0; |
| 155 | |
| 156 | if (gpio_request(OLPC_GPIO_MIC_AC, DRV_NAME)) { |
| 157 | dev_err(card->dev, "unable to allocate MIC GPIO\n"); |
| 158 | return -EIO; |
| 159 | } |
| 160 | gpio_direction_output(OLPC_GPIO_MIC_AC, 0); |
| 161 | |
| 162 | /* drop the original AD1888 HPF control */ |
| 163 | memset(&elem, 0, sizeof(elem)); |
| 164 | elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER; |
| 165 | strlcpy(elem.name, "High Pass Filter Enable", sizeof(elem.name)); |
| 166 | snd_ctl_remove_id(card, &elem); |
| 167 | |
| 168 | /* drop the original V_REFOUT control */ |
| 169 | memset(&elem, 0, sizeof(elem)); |
| 170 | elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER; |
| 171 | strlcpy(elem.name, "V_REFOUT Enable", sizeof(elem.name)); |
| 172 | snd_ctl_remove_id(card, &elem); |
| 173 | |
| 174 | /* add the OLPC-specific controls */ |
| 175 | for (i = 0; i < ARRAY_SIZE(olpc_cs5535audio_ctls); i++) { |
| 176 | err = snd_ctl_add(card, snd_ctl_new1(&olpc_cs5535audio_ctls[i], |
| 177 | ac97->private_data)); |
| 178 | if (err < 0) { |
| 179 | gpio_free(OLPC_GPIO_MIC_AC); |
| 180 | return err; |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | /* turn off the mic by default */ |
| 185 | olpc_mic_bias(ac97, 0); |
| 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | void olpc_quirks_cleanup(void) |
| 190 | { |
| 191 | gpio_free(OLPC_GPIO_MIC_AC); |
| 192 | } |