2015-05-22 11:59:15 -06:00
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/*
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* Greybus audio driver
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*
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* Copyright 2015 Google Inc.
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* Copyright 2015 Linaro Ltd.
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*
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* Released under the GPLv2 only.
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*/
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2015-05-08 13:57:36 -06:00
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/workqueue.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/dmaengine_pcm.h>
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#include <sound/simple_card.h>
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2015-05-22 11:35:31 -06:00
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2015-05-08 13:57:36 -06:00
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#include "greybus.h"
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#include "audio.h"
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#define GB_AUDIO_DATA_DRIVER_NAME "gb_audio_data"
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#define GB_AUDIO_MGMT_DRIVER_NAME "gb_audio_mgmt"
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2015-05-21 16:56:56 -06:00
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#define RT5647_I2C_ADAPTER_NR 6
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#define RT5647_I2C_ADDR 0x1b
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2015-05-08 13:57:36 -06:00
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/*
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* gb_snd management functions
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*/
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static DEFINE_SPINLOCK(gb_snd_list_lock);
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static LIST_HEAD(gb_snd_list);
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static int device_count;
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static struct gb_snd *gb_find_snd(int bundle_id)
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{
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struct gb_snd *tmp, *ret = NULL;
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unsigned long flags;
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spin_lock_irqsave(&gb_snd_list_lock, flags);
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list_for_each_entry(tmp, &gb_snd_list, list)
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if (tmp->gb_bundle_id == bundle_id) {
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ret = tmp;
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break;
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}
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spin_unlock_irqrestore(&gb_snd_list_lock, flags);
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return ret;
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}
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static struct gb_snd *gb_get_snd(int bundle_id)
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{
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struct gb_snd *snd_dev;
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unsigned long flags;
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snd_dev = gb_find_snd(bundle_id);
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if (snd_dev)
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return snd_dev;
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snd_dev = kzalloc(sizeof(*snd_dev), GFP_KERNEL);
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if (!snd_dev)
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return NULL;
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spin_lock_init(&snd_dev->lock);
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snd_dev->device_count = device_count++;
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snd_dev->gb_bundle_id = bundle_id;
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spin_lock_irqsave(&gb_snd_list_lock, flags);
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list_add(&snd_dev->list, &gb_snd_list);
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spin_unlock_irqrestore(&gb_snd_list_lock, flags);
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return snd_dev;
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}
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static void gb_free_snd(struct gb_snd *snd)
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{
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unsigned long flags;
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spin_lock_irqsave(&gb_snd_list_lock, flags);
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if (!snd->i2s_tx_connection &&
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!snd->mgmt_connection) {
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list_del(&snd->list);
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spin_unlock_irqrestore(&gb_snd_list_lock, flags);
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kfree(snd);
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} else {
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spin_unlock_irqrestore(&gb_snd_list_lock, flags);
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}
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}
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/*
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* This is the ASoC simple card binds the platform codec,
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* cpu-dai and codec-dai togheter
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*/
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struct gb_card_info_object {
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struct asoc_simple_card_info card_info;
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char codec_name[255];
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char platform_name[255];
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char dai_name[255];
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};
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2015-05-11 15:09:09 -06:00
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static struct asoc_simple_card_info *setup_card_info(int device_count)
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2015-05-08 13:57:36 -06:00
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{
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struct gb_card_info_object *obj;
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obj = kzalloc(sizeof(struct gb_card_info_object), GFP_KERNEL);
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if (!obj)
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return NULL;
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obj->card_info.name = "Greybus Audio Module";
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obj->card_info.card = "gb-card";
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obj->card_info.codec = obj->codec_name;
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obj->card_info.platform = obj->platform_name;
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obj->card_info.cpu_dai.name = obj->dai_name;
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2015-05-08 14:40:47 -06:00
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#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
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2015-05-21 16:56:57 -06:00
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obj->card_info.cpu_dai.fmt = SND_SOC_DAIFMT_CBM_CFM;
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2015-05-08 14:40:47 -06:00
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#endif
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2015-05-08 13:57:36 -06:00
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#if USE_RT5645
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2015-05-21 16:56:57 -06:00
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obj->card_info.daifmt = SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_I2S;
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2015-05-21 16:56:56 -06:00
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sprintf(obj->codec_name, "rt5645.%d-%04x", RT5647_I2C_ADAPTER_NR,
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RT5647_I2C_ADDR);
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2015-05-08 13:57:36 -06:00
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obj->card_info.codec_dai.name = "rt5645-aif1";
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2015-05-21 16:56:58 -06:00
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#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
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2015-05-21 16:56:57 -06:00
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obj->card_info.codec_dai.fmt = SND_SOC_DAIFMT_CBS_CFS;
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2015-05-21 16:56:58 -06:00
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#endif
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2015-05-08 13:57:36 -06:00
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obj->card_info.codec_dai.sysclk = 12288000;
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#else
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sprintf(obj->codec_name, "spdif-dit");
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obj->card_info.codec_dai.name = "dit-hifi";
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#endif
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sprintf(obj->platform_name, "gb-pcm-audio.%i", device_count);
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sprintf(obj->dai_name, "gb-dai-audio.%i", device_count);
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return &obj->card_info;
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}
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2015-05-11 15:09:09 -06:00
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static void free_card_info(struct asoc_simple_card_info *ci)
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2015-05-08 13:57:36 -06:00
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{
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struct gb_card_info_object *obj;
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obj = container_of(ci, struct gb_card_info_object, card_info);
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kfree(obj);
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}
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/*
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* XXX this is sort of cruddy but I get warnings if
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* we don't have dev.release handler set.
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*/
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static void default_release(struct device *dev)
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{
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}
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/*
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* GB connection hooks
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*/
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static int gb_i2s_transmitter_connection_init(struct gb_connection *connection)
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{
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struct gb_snd *snd_dev;
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struct platform_device *codec, *dai;
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struct asoc_simple_card_info *simple_card;
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2015-05-21 16:56:59 -06:00
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#if USE_RT5645
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struct i2c_board_info rt5647_info;
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2015-06-26 17:38:46 -06:00
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struct i2c_adapter *i2c_adap;
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2015-05-21 16:56:59 -06:00
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#endif
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2015-05-08 13:57:36 -06:00
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unsigned long flags;
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int ret;
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snd_dev = gb_get_snd(connection->bundle->id);
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if (!snd_dev)
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return -ENOMEM;
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codec = platform_device_register_simple("spdif-dit", -1, NULL, 0);
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if (!codec) {
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ret = -ENOMEM;
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goto out;
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}
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dai = platform_device_register_simple("gb-pcm-audio", snd_dev->device_count, NULL, 0);
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if (!dai) {
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ret = -ENOMEM;
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goto out;
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}
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simple_card = setup_card_info(snd_dev->device_count);
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if (!simple_card) {
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ret = -ENOMEM;
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goto out;
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}
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spin_lock_irqsave(&snd_dev->lock, flags);
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snd_dev->card.name = "asoc-simple-card";
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snd_dev->card.id = snd_dev->device_count;
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snd_dev->card.dev.release = default_release; /* XXX - suspicious */
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snd_dev->cpu_dai.name = "gb-dai-audio";
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snd_dev->cpu_dai.id = snd_dev->device_count;
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snd_dev->cpu_dai.dev.release = default_release; /* XXX - suspicious */
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snd_dev->simple_card_info = simple_card;
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snd_dev->card.dev.platform_data = simple_card;
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snd_dev->codec = codec;
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snd_dev->i2s_tx_connection = connection;
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snd_dev->cpu_dai.dev.platform_data = snd_dev;
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snd_dev->i2s_tx_connection->private = snd_dev;
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spin_unlock_irqrestore(&snd_dev->lock, flags);
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ret = platform_device_register(&snd_dev->cpu_dai);
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if (ret) {
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pr_err("cpu_dai platform_device register failed\n");
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goto out_dai;
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}
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ret = platform_device_register(&snd_dev->card);
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if (ret) {
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pr_err("card platform_device register failed\n");
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goto out_card;
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}
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ret = gb_i2s_data_get_version(connection);
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if (ret) {
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pr_err("i2s data get_version() failed: %d\n", ret);
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goto out_get_ver;
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}
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2015-05-21 16:56:59 -06:00
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#if USE_RT5645
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rt5647_info.addr = RT5647_I2C_ADDR;
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strlcpy(rt5647_info.type, "rt5647", I2C_NAME_SIZE);
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2015-06-26 17:38:46 -06:00
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i2c_adap = i2c_get_adapter(RT5647_I2C_ADAPTER_NR);
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if (!i2c_adap) {
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pr_err("codec unavailable\n");
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ret = -ENODEV;
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goto out_get_ver;
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}
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snd_dev->rt5647 = i2c_new_device(i2c_adap, &rt5647_info);
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2015-05-21 16:56:59 -06:00
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if (!snd_dev->rt5647) {
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pr_err("can't create rt5647 i2c device\n");
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goto out_get_ver;
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}
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#endif
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2015-05-08 13:57:36 -06:00
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return 0;
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out_get_ver:
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platform_device_unregister(&snd_dev->card);
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out_card:
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platform_device_unregister(&snd_dev->cpu_dai);
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out_dai:
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platform_device_unregister(codec);
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out:
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gb_free_snd(snd_dev);
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return ret;
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}
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static void gb_i2s_transmitter_connection_exit(struct gb_connection *connection)
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{
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struct gb_snd *snd_dev;
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snd_dev = (struct gb_snd *)connection->private;
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2015-05-21 16:56:59 -06:00
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#if USE_RT5645
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i2c_unregister_device(snd_dev->rt5647);
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#endif
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2015-05-08 13:57:36 -06:00
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platform_device_unregister(&snd_dev->card);
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platform_device_unregister(&snd_dev->cpu_dai);
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platform_device_unregister(snd_dev->codec);
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free_card_info(snd_dev->simple_card_info);
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snd_dev->i2s_tx_connection = NULL;
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gb_free_snd(snd_dev);
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}
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static int gb_i2s_mgmt_connection_init(struct gb_connection *connection)
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{
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struct gb_snd *snd_dev;
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unsigned long flags;
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int ret;
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snd_dev = gb_get_snd(connection->bundle->id);
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if (!snd_dev)
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return -ENOMEM;
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spin_lock_irqsave(&snd_dev->lock, flags);
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snd_dev->mgmt_connection = connection;
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connection->private = snd_dev;
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spin_unlock_irqrestore(&snd_dev->lock, flags);
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ret = gb_i2s_mgmt_get_version(connection);
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if (ret) {
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pr_err("i2s mgmt get_version() failed: %d\n", ret);
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goto err_free_snd_dev;
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}
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2015-05-21 16:57:03 -06:00
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ret = gb_i2s_mgmt_get_cfgs(snd_dev, connection);
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if (ret) {
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pr_err("can't get i2s configurations: %d\n", ret);
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goto err_free_snd_dev;
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}
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2015-05-08 13:57:36 -06:00
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2015-05-21 16:57:04 -06:00
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ret = gb_i2s_mgmt_set_samples_per_message(snd_dev->mgmt_connection,
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CONFIG_SAMPLES_PER_MSG);
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if (ret) {
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pr_err("set_samples_per_msg failed: %d\n", ret);
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goto err_free_i2s_configs;
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}
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2015-05-08 13:57:36 -06:00
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snd_dev->send_data_req_buf = kzalloc(SEND_DATA_BUF_LEN, GFP_KERNEL);
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if (!snd_dev->send_data_req_buf) {
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ret = -ENOMEM;
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2015-05-21 16:57:03 -06:00
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goto err_free_i2s_configs;
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2015-05-08 13:57:36 -06:00
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}
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return 0;
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2015-05-21 16:57:03 -06:00
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err_free_i2s_configs:
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gb_i2s_mgmt_free_cfgs(snd_dev);
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2015-05-08 13:57:36 -06:00
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err_free_snd_dev:
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gb_free_snd(snd_dev);
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return ret;
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}
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static void gb_i2s_mgmt_connection_exit(struct gb_connection *connection)
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{
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struct gb_snd *snd_dev = (struct gb_snd *)connection->private;
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2015-05-21 16:57:03 -06:00
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gb_i2s_mgmt_free_cfgs(snd_dev);
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2015-05-08 13:57:36 -06:00
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kfree(snd_dev->send_data_req_buf);
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snd_dev->send_data_req_buf = NULL;
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|
|
|
|
|
snd_dev->mgmt_connection = NULL;
|
|
|
|
gb_free_snd(snd_dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int gb_i2s_mgmt_report_event_recv(u8 type, struct gb_operation *op)
|
|
|
|
{
|
|
|
|
struct gb_connection *connection = op->connection;
|
|
|
|
struct gb_i2s_mgmt_report_event_request *req = op->request->payload;
|
|
|
|
char *event_name;
|
|
|
|
|
|
|
|
if (type != GB_I2S_MGMT_TYPE_REPORT_EVENT) {
|
|
|
|
dev_err(&connection->dev, "Invalid request type: %d\n",
|
|
|
|
type);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (op->request->payload_size < sizeof(*req)) {
|
2015-05-08 14:33:36 -06:00
|
|
|
dev_err(&connection->dev, "Short request received: %zu, %zu\n",
|
2015-05-08 13:57:36 -06:00
|
|
|
op->request->payload_size, sizeof(*req));
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (req->event) {
|
|
|
|
case GB_I2S_MGMT_EVENT_UNSPECIFIED:
|
|
|
|
event_name = "UNSPECIFIED";
|
|
|
|
break;
|
|
|
|
case GB_I2S_MGMT_EVENT_HALT:
|
|
|
|
/* XXX Should stop streaming now */
|
|
|
|
event_name = "HALT";
|
|
|
|
break;
|
|
|
|
case GB_I2S_MGMT_EVENT_INTERNAL_ERROR:
|
|
|
|
event_name = "INTERNAL_ERROR";
|
|
|
|
break;
|
|
|
|
case GB_I2S_MGMT_EVENT_PROTOCOL_ERROR:
|
|
|
|
event_name = "PROTOCOL_ERROR";
|
|
|
|
break;
|
|
|
|
case GB_I2S_MGMT_EVENT_FAILURE:
|
|
|
|
event_name = "FAILURE";
|
|
|
|
break;
|
|
|
|
case GB_I2S_MGMT_EVENT_OUT_OF_SEQUENCE:
|
|
|
|
event_name = "OUT_OF_SEQUENCE";
|
|
|
|
break;
|
|
|
|
case GB_I2S_MGMT_EVENT_UNDERRUN:
|
|
|
|
event_name = "UNDERRUN";
|
|
|
|
break;
|
|
|
|
case GB_I2S_MGMT_EVENT_OVERRUN:
|
|
|
|
event_name = "OVERRUN";
|
|
|
|
break;
|
|
|
|
case GB_I2S_MGMT_EVENT_CLOCKING:
|
|
|
|
event_name = "CLOCKING";
|
|
|
|
break;
|
|
|
|
case GB_I2S_MGMT_EVENT_DATA_LEN:
|
|
|
|
event_name = "DATA_LEN";
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
dev_warn(&connection->dev, "Unknown I2S Event received: %d\n",
|
|
|
|
req->event);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
dev_warn(&connection->dev, "I2S Event received: %d - '%s'\n",
|
|
|
|
req->event, event_name);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct gb_protocol gb_i2s_receiver_protocol = {
|
|
|
|
.name = GB_AUDIO_DATA_DRIVER_NAME,
|
|
|
|
.id = GREYBUS_PROTOCOL_I2S_RECEIVER,
|
|
|
|
.major = 0,
|
|
|
|
.minor = 1,
|
|
|
|
.connection_init = gb_i2s_transmitter_connection_init,
|
|
|
|
.connection_exit = gb_i2s_transmitter_connection_exit,
|
|
|
|
.request_recv = NULL,
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct gb_protocol gb_i2s_mgmt_protocol = {
|
|
|
|
.name = GB_AUDIO_MGMT_DRIVER_NAME,
|
|
|
|
.id = GREYBUS_PROTOCOL_I2S_MGMT,
|
|
|
|
.major = 0,
|
|
|
|
.minor = 1,
|
|
|
|
.connection_init = gb_i2s_mgmt_connection_init,
|
|
|
|
.connection_exit = gb_i2s_mgmt_connection_exit,
|
|
|
|
.request_recv = gb_i2s_mgmt_report_event_recv,
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is the basic hook get things initialized and registered w/ gb
|
|
|
|
*/
|
|
|
|
|
|
|
|
int gb_audio_protocol_init(void)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = gb_protocol_register(&gb_i2s_mgmt_protocol);
|
|
|
|
if (err) {
|
|
|
|
pr_err("Can't register i2s mgmt protocol driver: %d\n", -err);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = gb_protocol_register(&gb_i2s_receiver_protocol);
|
|
|
|
if (err) {
|
|
|
|
pr_err("Can't register Audio protocol driver: %d\n", -err);
|
|
|
|
goto err_unregister_i2s_mgmt;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = platform_driver_register(&gb_audio_plat_driver);
|
|
|
|
if (err) {
|
|
|
|
pr_err("Can't register platform driver: %d\n", -err);
|
|
|
|
goto err_unregister_plat;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = platform_driver_register(&gb_audio_pcm_driver);
|
|
|
|
if (err) {
|
|
|
|
pr_err("Can't register pcm driver: %d\n", -err);
|
|
|
|
goto err_unregister_pcm;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_unregister_pcm:
|
|
|
|
platform_driver_unregister(&gb_audio_plat_driver);
|
|
|
|
err_unregister_plat:
|
|
|
|
gb_protocol_deregister(&gb_i2s_receiver_protocol);
|
|
|
|
err_unregister_i2s_mgmt:
|
|
|
|
gb_protocol_deregister(&gb_i2s_mgmt_protocol);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
void gb_audio_protocol_exit(void)
|
|
|
|
{
|
|
|
|
platform_driver_unregister(&gb_audio_pcm_driver);
|
|
|
|
platform_driver_unregister(&gb_audio_plat_driver);
|
|
|
|
gb_protocol_deregister(&gb_i2s_receiver_protocol);
|
|
|
|
gb_protocol_deregister(&gb_i2s_mgmt_protocol);
|
|
|
|
}
|