Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755560AbYKEWm0 (ORCPT ); Wed, 5 Nov 2008 17:42:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753291AbYKEWmS (ORCPT ); Wed, 5 Nov 2008 17:42:18 -0500 Received: from mail.queued.net ([207.210.101.209]:4841 "EHLO mail.queued.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753239AbYKEWmR convert rfc822-to-8bit (ORCPT ); Wed, 5 Nov 2008 17:42:17 -0500 Date: Wed, 5 Nov 2008 17:31:13 -0500 From: Andres Salomon To: jayakumar.alsa@gmail.com Cc: linux-kernel@vger.kernel.org, akpm@linux-foundation.org Subject: [PATCH 4/4] ALSA: cs5535audio: OLPC Analog Input and MIC Bias support Message-ID: <20081105173113.06e93db3@ephemeral> X-Mailer: Claws Mail 3.5.0 (GTK+ 2.12.11; i486-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 9643 Lines: 309 This adds support for the special cs5535audio features that OLPC XO-1s have. They support switching between analog and DC recording, and the MIC requires toggling V_REFOUT (which this patch renames to MIC Bias) to operate. There's also an EAPD tweak which is necessary for B3 and newer machines. All of this is enabled by CONFIG_OLPC (and CONFIG_SND_CS5535AUDIO, obviously). Signed-off-by: Andres Salomon --- sound/pci/cs5535audio/Makefile | 1 + sound/pci/cs5535audio/cs5535audio.c | 9 ++ sound/pci/cs5535audio/cs5535audio.h | 35 ++++++ sound/pci/cs5535audio/cs5535audio_olpc.c | 173 ++++++++++++++++++++++++++++++ sound/pci/cs5535audio/cs5535audio_pcm.c | 3 + 5 files changed, 221 insertions(+), 0 deletions(-) create mode 100644 sound/pci/cs5535audio/cs5535audio_olpc.c diff --git a/sound/pci/cs5535audio/Makefile b/sound/pci/cs5535audio/Makefile index bb3d57e..ccc6422 100644 --- a/sound/pci/cs5535audio/Makefile +++ b/sound/pci/cs5535audio/Makefile @@ -4,6 +4,7 @@ snd-cs5535audio-y := cs5535audio.o cs5535audio_pcm.o snd-cs5535audio-$(CONFIG_PM) += cs5535audio_pm.o +snd-cs5535audio-$(CONFIG_OLPC) += cs5535audio_olpc.o # Toplevel Module Dependency obj-$(CONFIG_SND_CS5535AUDIO) += snd-cs5535audio.o diff --git a/sound/pci/cs5535audio/cs5535audio.c b/sound/pci/cs5535audio/cs5535audio.c index 6c886ed..826e6de 100644 --- a/sound/pci/cs5535audio/cs5535audio.c +++ b/sound/pci/cs5535audio/cs5535audio.c @@ -164,6 +164,9 @@ static int __devinit snd_cs5535audio_mixer(struct cs5535audio *cs5535au) ac97.private_data = cs5535au; ac97.pci = cs5535au->pci; + /* set any OLPC-specific scaps */ + olpc_prequirks(card, &ac97); + if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) { snd_printk(KERN_ERR "mixer failed\n"); return err; @@ -171,6 +174,12 @@ static int __devinit snd_cs5535audio_mixer(struct cs5535audio *cs5535au) snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk); + err = olpc_quirks(card, cs5535au->ac97); + if (err < 0) { + snd_printk(KERN_ERR "olpc quirks failed\n"); + return err; + } + return 0; } diff --git a/sound/pci/cs5535audio/cs5535audio.h b/sound/pci/cs5535audio/cs5535audio.h index 1aa1e2b..7777037 100644 --- a/sound/pci/cs5535audio/cs5535audio.h +++ b/sound/pci/cs5535audio/cs5535audio.h @@ -99,6 +99,41 @@ int snd_cs5535audio_suspend(struct pci_dev *pci, pm_message_t state); int snd_cs5535audio_resume(struct pci_dev *pci); #endif +#ifdef CONFIG_OLPC +void __devinit olpc_prequirks(struct snd_card *card, + struct snd_ac97_template *ac97); +int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97); +void olpc_analog_input(struct snd_ac97 *ac97, int on); +void olpc_mic_bias(struct snd_ac97 *ac97, int on); + +static inline void olpc_capture_open(struct snd_ac97 *ac97) +{ + /* default to Analog Input off */ + olpc_analog_input(ac97, 0); + /* enable MIC Bias for recording */ + olpc_mic_bias(ac97, 1); +} + +static inline void olpc_capture_close(struct snd_ac97 *ac97) +{ + /* disable Analog Input */ + olpc_analog_input(ac97, 0); + /* disable the MIC Bias (so the recording LED turns off) */ + olpc_mic_bias(ac97, 0); +} +#else +static inline void olpc_prequirks(struct snd_card *card, + struct snd_ac97_template *ac97) { } +static inline int olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97) +{ + return 0; +} +static inline void olpc_analog_input(struct snd_ac97 *ac97, int on) { } +static inline void olpc_mic_bias(struct snd_ac97 *ac97, int on) { } +static inline void olpc_capture_open(struct snd_ac97 *ac97) { } +static inline void olpc_capture_close(struct snd_ac97 *ac97) { } +#endif + int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535audio); #endif /* __SOUND_CS5535AUDIO_H */ diff --git a/sound/pci/cs5535audio/cs5535audio_olpc.c b/sound/pci/cs5535audio/cs5535audio_olpc.c new file mode 100644 index 0000000..164f6bd --- /dev/null +++ b/sound/pci/cs5535audio/cs5535audio_olpc.c @@ -0,0 +1,173 @@ +/* + * OLPC XO-1 additional sound features + * + * Copyright © 2006 Jaya Kumar + * Copyright © 2007-2008 Andres Salomon + * + * 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. + */ +#include +#include +#include +#include + +#include +#include "cs5535audio.h" + +/* + * 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; + + /* 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) { + snd_printk(KERN_ERR "setting High Pass Filter - %d\n", err); + return; + } + + /* set Analog Input through GPIO */ + if (on) + geode_gpio_set(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL); + else + geode_gpio_clear(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL); +} + +/* + * OLPC XO-1's V_REFOUT is a mic bias enable. + */ +void olpc_mic_bias(struct snd_ac97 *ac97, int on) +{ + int err; + + 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) + snd_printk(KERN_ERR "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] = geode_gpio_isset(OLPC_GPIO_MIC_AC, + GPIO_OUTPUT_VAL); + 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[] __devinitdata = { +{ + .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 __devinit 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 __devinit 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; + + /* drop the original AD1888 HPF control */ + memset(&elem, 0, sizeof(elem)); + elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER; + strncpy(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; + strncpy(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) + return err; + } + + /* turn off the mic by default */ + olpc_mic_bias(ac97, 0); + return 0; +} diff --git a/sound/pci/cs5535audio/cs5535audio_pcm.c b/sound/pci/cs5535audio/cs5535audio_pcm.c index 6aa0c19..0f48a87 100644 --- a/sound/pci/cs5535audio/cs5535audio_pcm.c +++ b/sound/pci/cs5535audio/cs5535audio_pcm.c @@ -363,11 +363,14 @@ static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream) if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) return err; + olpc_capture_open(cs5535au->ac97); return 0; } static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream) { + struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); + olpc_capture_close(cs5535au->ac97); return 0; } -- 1.5.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/