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/*
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2024-5-1 GuEe-GUI first version
*/
#define DBG_TAG "audio.pcm.spacemit"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#include "spacemit-audio.h"
static rt_list_t pcm_nodes = RT_LIST_OBJECT_INIT(pcm_nodes);
static RT_DEFINE_SPINLOCK(pcm_nodes_lock);
struct spacemit_pcm *spacemit_pcm_find(struct rt_ofw_node *np)
{
struct spacemit_pcm *pcm;
rt_spin_lock(&pcm_nodes_lock);
rt_list_for_each_entry(pcm, &pcm_nodes, list)
{
if (pcm->np == np)
{
rt_spin_unlock(&pcm_nodes_lock);
return pcm;
}
}
rt_spin_unlock(&pcm_nodes_lock);
return RT_NULL;
}
static void spacemit_pcm_free(struct spacemit_pcm *pcm)
{
if (!pcm)
{
return;
}
if (!rt_is_err_or_null(pcm->rx))
{
rt_dma_chan_release(pcm->rx);
}
if (!rt_is_err_or_null(pcm->tx))
{
rt_dma_chan_release(pcm->tx);
}
if (pcm->hdmi_buffer)
{
rt_iounmap(pcm->hdmi_buffer);
}
rt_free(pcm);
}
static rt_err_t spacemit_pcm_probe(struct rt_platform_device *pdev)
{
rt_err_t err;
rt_uint64_t address, size;
struct rt_device *dev = &pdev->parent;
struct spacemit_pcm *pcm = rt_calloc(1, sizeof(*pcm));
if (!pcm)
{
return -RT_ENOMEM;
}
pcm->dev = dev;
pcm->np = dev->ofw_node;
pcm->is_hdmi = rt_ofw_node_is_compatible(dev->ofw_node,
"spacemit,spacemit-snd-dma-hdmi");
if (pcm->is_hdmi)
{
pcm->hdmi_buffer = rt_dm_dev_iomap(dev, 0);
if (!pcm->hdmi_buffer ||
rt_dm_dev_get_address(dev, 0, &address, &size))
{
err = -RT_EIO;
goto _fail;
}
pcm->hdmi_dma = (rt_ubase_t)address;
pcm->hdmi_size = (rt_size_t)size;
rt_memset(pcm->hdmi_buffer, 0, pcm->hdmi_size);
rt_hw_wmb();
}
pcm->tx = rt_dma_chan_request(dev, "tx");
if (rt_is_err_or_null(pcm->tx))
{
err = pcm->tx ? rt_ptr_err(pcm->tx) : -RT_ENOSYS;
goto _fail;
}
if (!pcm->is_hdmi)
{
pcm->rx = rt_dma_chan_request(dev, "rx");
if (rt_is_err_or_null(pcm->rx))
{
err = pcm->rx ? rt_ptr_err(pcm->rx) : -RT_ENOSYS;
goto _fail;
}
}
rt_spin_lock(&pcm_nodes_lock);
rt_list_insert_before(&pcm_nodes, &pcm->list);
rt_spin_unlock(&pcm_nodes_lock);
dev->user_data = pcm;
rt_dm_dev_bind_fwdata(dev, RT_NULL, pcm);
LOG_D("%s: %s DMA path ready", rt_dm_dev_get_name(dev),
pcm->is_hdmi ? "HDMI" : "I2S");
return RT_EOK;
_fail:
spacemit_pcm_free(pcm);
return err;
}
static rt_err_t spacemit_pcm_remove(struct rt_platform_device *pdev)
{
struct spacemit_pcm *pcm = pdev->parent.user_data;
if (!pcm)
{
return RT_EOK;
}
rt_spin_lock(&pcm_nodes_lock);
rt_list_remove(&pcm->list);
rt_spin_unlock(&pcm_nodes_lock);
rt_dm_dev_unbind_fwdata(&pdev->parent, RT_NULL);
spacemit_pcm_free(pcm);
return RT_EOK;
}
static const struct rt_ofw_node_id spacemit_pcm_ofw_ids[] =
{
{ .compatible = "spacemit,spacemit-snd-dma0" },
{ .compatible = "spacemit,spacemit-snd-dma1" },
{ .compatible = "spacemit,spacemit-snd-dma-hdmi" },
{ /* sentinel */ }
};
static struct rt_platform_driver spacemit_pcm_driver =
{
.name = "spacemit-audio-pcm",
.ids = spacemit_pcm_ofw_ids,
.probe = spacemit_pcm_probe,
.remove = spacemit_pcm_remove,
};
static int spacemit_pcm_register(void)
{
rt_platform_driver_register(&spacemit_pcm_driver);
return 0;
}
INIT_DEVICE_EXPORT(spacemit_pcm_register);
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