[alsa-devel] [PATCH 8/8] ASoC: AMD: add AMD ASoC ACP-I2S driver
Alex Deucher
alexdeucher at gmail.com
Thu Oct 8 18:12:40 CEST 2015
From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu at amd.com>
ACP IP block consists of dedicated DMA and I2S blocks. The PCM driver
provides the platform DMA component to ALSA core.
Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Reviewed-by: Murali Krishna Vemuri <murali-krishna.vemuri at amd.com>
---
v2: squash in Kconfig fix
v3: squash additional commits, convert to mfd, drop rt286 changes
v4: add major changes as below:
1. remove i2s specific changes and add them to dwc i2s driver.
2. add ACP DMA logic to PCM driver.
sound/soc/Kconfig | 1 +
sound/soc/Makefile | 1 +
sound/soc/amd/Kconfig | 4 +
sound/soc/amd/Makefile | 3 +
sound/soc/amd/acp-pcm-dma.c | 518 +++++++++++++++++++++++++++++++
sound/soc/amd/acp.c | 736 ++++++++++++++++++++++++++++++++++++++++++++
sound/soc/amd/acp.h | 147 +++++++++
7 files changed, 1410 insertions(+)
create mode 100644 sound/soc/amd/Kconfig
create mode 100644 sound/soc/amd/Makefile
create mode 100644 sound/soc/amd/acp-pcm-dma.c
create mode 100644 sound/soc/amd/acp.c
create mode 100644 sound/soc/amd/acp.h
diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
index 225bfda..a278840 100644
--- a/sound/soc/Kconfig
+++ b/sound/soc/Kconfig
@@ -35,6 +35,7 @@ config SND_SOC_TOPOLOGY
# All the supported SoCs
source "sound/soc/adi/Kconfig"
+source "sound/soc/amd/Kconfig"
source "sound/soc/atmel/Kconfig"
source "sound/soc/au1x/Kconfig"
source "sound/soc/bcm/Kconfig"
diff --git a/sound/soc/Makefile b/sound/soc/Makefile
index 134aca1..5927544 100644
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_SND_SOC) += snd-soc-core.o
obj-$(CONFIG_SND_SOC) += codecs/
obj-$(CONFIG_SND_SOC) += generic/
obj-$(CONFIG_SND_SOC) += adi/
+obj-$(CONFIG_SND_SOC) += amd/
obj-$(CONFIG_SND_SOC) += atmel/
obj-$(CONFIG_SND_SOC) += au1x/
obj-$(CONFIG_SND_SOC) += bcm/
diff --git a/sound/soc/amd/Kconfig b/sound/soc/amd/Kconfig
new file mode 100644
index 0000000..78187eb
--- /dev/null
+++ b/sound/soc/amd/Kconfig
@@ -0,0 +1,4 @@
+config SND_SOC_AMD_ACP
+ tristate "AMD Audio Coprocessor support"
+ help
+ This option enables ACP DMA support on AMD platform.
diff --git a/sound/soc/amd/Makefile b/sound/soc/amd/Makefile
new file mode 100644
index 0000000..62648cb
--- /dev/null
+++ b/sound/soc/amd/Makefile
@@ -0,0 +1,3 @@
+snd-soc-acp-pcm-objs := acp-pcm-dma.o acp.o
+
+obj-$(CONFIG_SND_SOC_AMD_ACP) += snd-soc-acp-pcm.o
diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c
new file mode 100644
index 0000000..5044188
--- /dev/null
+++ b/sound/soc/amd/acp-pcm-dma.c
@@ -0,0 +1,518 @@
+/*
+ * AMD ALSA SoC PCM Driver
+ *
+ * Copyright 2014-2015 Advanced Micro Devices, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/pci.h>
+#include <linux/pm_runtime.h>
+#include <linux/mfd/amd_acp.h>
+
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "acp.h"
+
+#define PLAYBACK_MIN_NUM_PERIODS 2
+#define PLAYBACK_MAX_NUM_PERIODS 2
+#define PLAYBACK_MAX_PERIOD_SIZE 16384
+#define PLAYBACK_MIN_PERIOD_SIZE 1024
+#define CAPTURE_MIN_NUM_PERIODS 2
+#define CAPTURE_MAX_NUM_PERIODS 2
+#define CAPTURE_MAX_PERIOD_SIZE 16384
+#define CAPTURE_MIN_PERIOD_SIZE 1024
+
+#define NUM_DSCRS_PER_CHANNEL 2
+
+#define MAX_BUFFER (PLAYBACK_MAX_PERIOD_SIZE * PLAYBACK_MAX_NUM_PERIODS)
+#define MIN_BUFFER MAX_BUFFER
+
+static const struct snd_pcm_hardware acp_pcm_hardware_playback = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
+ SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_8000_96000,
+ .rate_min = 8000,
+ .rate_max = 96000,
+ .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
+ .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
+ .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
+ .periods_min = PLAYBACK_MIN_NUM_PERIODS,
+ .periods_max = PLAYBACK_MAX_NUM_PERIODS,
+};
+
+static const struct snd_pcm_hardware acp_pcm_hardware_capture = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
+ SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
+ .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
+ .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
+ .periods_min = CAPTURE_MIN_NUM_PERIODS,
+ .periods_max = CAPTURE_MAX_NUM_PERIODS,
+};
+
+struct audio_drv_data {
+ struct snd_pcm_substream *play_stream;
+ struct snd_pcm_substream *capture_stream;
+ struct acp_irq_prv *iprv;
+ void __iomem *acp_mmio;
+};
+
+/* ACP DMA irq handler routine for playback, capture usecases */
+int dma_irq_handler(struct device *dev)
+{
+ u16 dscr_idx;
+ u32 intr_flag;
+
+ int priority_level = 0;
+ struct audio_drv_data *irq_data = dev_get_drvdata(dev);
+ void __iomem *acp_mmio = irq_data->acp_mmio;
+
+ intr_flag = acp_get_intr_flag(acp_mmio);
+
+ if ((intr_flag & BIT(ACP_TO_I2S_DMA_CH_NUM)) != 0) {
+ dscr_idx = get_dscr_idx(acp_mmio, SNDRV_PCM_STREAM_PLAYBACK);
+ config_acp_dma_channel(acp_mmio, SYSRAM_TO_ACP_CH_NUM, dscr_idx,
+ 1, priority_level);
+ acp_dma_start(acp_mmio, SYSRAM_TO_ACP_CH_NUM, false);
+
+ snd_pcm_period_elapsed(irq_data->play_stream);
+ acp_ext_stat_clear_dmaioc(acp_mmio, ACP_TO_I2S_DMA_CH_NUM);
+ }
+
+ if ((intr_flag & BIT(I2S_TO_ACP_DMA_CH_NUM)) != 0) {
+ dscr_idx = get_dscr_idx(acp_mmio, SNDRV_PCM_STREAM_CAPTURE);
+ config_acp_dma_channel(acp_mmio, ACP_TO_SYSRAM_CH_NUM, dscr_idx,
+ 1, priority_level);
+ acp_dma_start(acp_mmio, ACP_TO_SYSRAM_CH_NUM, false);
+ acp_ext_stat_clear_dmaioc(acp_mmio, I2S_TO_ACP_DMA_CH_NUM);
+ }
+
+ if ((intr_flag & BIT(ACP_TO_SYSRAM_CH_NUM)) != 0) {
+ snd_pcm_period_elapsed(irq_data->capture_stream);
+ acp_ext_stat_clear_dmaioc(acp_mmio, ACP_TO_SYSRAM_CH_NUM);
+ }
+
+ return 0;
+}
+
+static int acp_dma_open(struct snd_pcm_substream *substream)
+{
+ int ret = 0;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *prtd = substream->private_data;
+ struct audio_drv_data *intr_data = dev_get_drvdata(prtd->platform->dev);
+
+ struct audio_substream_data *adata =
+ kzalloc(sizeof(struct audio_substream_data), GFP_KERNEL);
+ if (adata == NULL)
+ return -ENOMEM;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ runtime->hw = acp_pcm_hardware_playback;
+ else
+ runtime->hw = acp_pcm_hardware_capture;
+
+ ret = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0) {
+ dev_err(prtd->platform->dev, "set integer constraint failed\n");
+ return ret;
+ }
+
+ adata->acp_mmio = intr_data->acp_mmio;
+ runtime->private_data = adata;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ intr_data->play_stream = substream;
+ else
+ intr_data->capture_stream = substream;
+
+ return 0;
+}
+
+static int acp_dma_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ int status;
+ uint64_t size;
+ struct snd_dma_buffer *dma_buffer;
+ struct page *pg;
+ u16 num_of_pages;
+ struct snd_pcm_runtime *runtime;
+ struct audio_substream_data *rtd;
+
+ dma_buffer = &substream->dma_buffer;
+
+ runtime = substream->runtime;
+ rtd = runtime->private_data;
+
+ if (WARN_ON(!rtd))
+ return -EINVAL;
+
+ size = params_buffer_bytes(params);
+ status = snd_pcm_lib_malloc_pages(substream, size);
+ if (status < 0)
+ return status;
+
+ memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
+ pg = virt_to_page(substream->dma_buffer.area);
+
+ if (pg != NULL) {
+ /* Save for runtime private data */
+ rtd->pg = pg;
+ rtd->order = get_order(size);
+
+ /* Let ACP know the Allocated memory */
+ num_of_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
+
+ /* Fill the page table entries in ACP SRAM */
+ rtd->pg = pg;
+ rtd->size = size;
+ rtd->num_of_pages = num_of_pages;
+ rtd->direction = substream->stream;
+
+ config_acp_dma(rtd->acp_mmio, rtd);
+ status = 0;
+ } else {
+ status = -ENOMEM;
+ }
+ return status;
+}
+
+static int acp_dma_hw_free(struct snd_pcm_substream *substream)
+{
+ return snd_pcm_lib_free_pages(substream);
+}
+
+static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream)
+{
+ u32 pos = 0;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct audio_substream_data *rtd = runtime->private_data;
+
+ pos = acp_update_dma_pointer(rtd->acp_mmio, substream->stream,
+ frames_to_bytes(runtime, runtime->period_size));
+ return bytes_to_frames(runtime, pos);
+
+}
+
+static int acp_dma_mmap(struct snd_pcm_substream *substream,
+ struct vm_area_struct *vma)
+{
+ return snd_pcm_lib_default_mmap(substream, vma);
+}
+
+static int acp_dma_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct audio_substream_data *rtd = runtime->private_data;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ config_acp_dma_channel(rtd->acp_mmio, SYSRAM_TO_ACP_CH_NUM,
+ PLAYBACK_START_DMA_DESCR_CH12,
+ NUM_DSCRS_PER_CHANNEL, 0);
+ config_acp_dma_channel(rtd->acp_mmio, ACP_TO_I2S_DMA_CH_NUM,
+ PLAYBACK_START_DMA_DESCR_CH13,
+ NUM_DSCRS_PER_CHANNEL, 0);
+ /* Fill ACP SRAM (2 periods) with zeros from System RAM
+ * which is zero-ed in hw_params */
+ acp_dma_start(rtd->acp_mmio, SYSRAM_TO_ACP_CH_NUM, false);
+
+ /* ACP SRAM (2 periods of buffer size) is intially filled with
+ * zeros. Before rendering starts, 2nd half of SRAM will be
+ * filled with valid audio data DMA'ed from first half of system
+ * RAM and 1st half of SRAM will be filled with Zeros. This is
+ * the initial scenario when redering starts from SRAM. Later
+ * on, 2nd half of system memory will be DMA'ed to 1st half of
+ * SRAM, 1st half of system memory will be DMA'ed to 2nd half of
+ * SRAM in ping-pong way till rendering stops. */
+ config_acp_dma_channel(rtd->acp_mmio, SYSRAM_TO_ACP_CH_NUM,
+ PLAYBACK_START_DMA_DESCR_CH12,
+ 1, 0);
+ } else {
+ config_acp_dma_channel(rtd->acp_mmio, ACP_TO_SYSRAM_CH_NUM,
+ CAPTURE_START_DMA_DESCR_CH14,
+ NUM_DSCRS_PER_CHANNEL, 0);
+ config_acp_dma_channel(rtd->acp_mmio, I2S_TO_ACP_DMA_CH_NUM,
+ CAPTURE_START_DMA_DESCR_CH15,
+ NUM_DSCRS_PER_CHANNEL, 0);
+ }
+ return 0;
+}
+
+static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ int ret;
+
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct audio_substream_data *rtd = runtime->private_data;
+ struct snd_soc_pcm_runtime *prtd = substream->private_data;
+ struct amd_acp_device *acp_dev = dev_get_platdata(prtd->platform->dev);
+
+ if (!rtd)
+ return -EINVAL;
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ acp_dma_start(rtd->acp_mmio,
+ SYSRAM_TO_ACP_CH_NUM, false);
+ prebuffer_audio(rtd->acp_mmio);
+ acp_dma_start(rtd->acp_mmio,
+ ACP_TO_I2S_DMA_CH_NUM, true);
+ acp_dev->irq_get(acp_dev);
+
+ } else {
+ acp_dma_start(rtd->acp_mmio,
+ I2S_TO_ACP_DMA_CH_NUM, true);
+ acp_dev->irq_get(acp_dev);
+ }
+ ret = 0;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ acp_dma_stop(rtd->acp_mmio, SYSRAM_TO_ACP_CH_NUM);
+ acp_dma_stop(rtd->acp_mmio, ACP_TO_I2S_DMA_CH_NUM);
+ acp_dev->irq_put(acp_dev);
+ } else {
+ acp_dma_stop(rtd->acp_mmio, I2S_TO_ACP_DMA_CH_NUM);
+ acp_dma_stop(rtd->acp_mmio, ACP_TO_SYSRAM_CH_NUM);
+ acp_dev->irq_put(acp_dev);
+ }
+ ret = 0;
+ break;
+ default:
+ ret = -EINVAL;
+
+ }
+ return ret;
+}
+
+static int acp_dma_new(struct snd_soc_pcm_runtime *rtd)
+{
+ return snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
+ SNDRV_DMA_TYPE_DEV,
+ NULL, MIN_BUFFER,
+ MAX_BUFFER);
+}
+
+static int acp_dma_close(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct audio_substream_data *rtd = runtime->private_data;
+ struct snd_soc_pcm_runtime *prtd = substream->private_data;
+
+ kfree(rtd);
+
+ pm_runtime_mark_last_busy(prtd->platform->dev);
+ return 0;
+}
+
+static struct snd_pcm_ops acp_dma_ops = {
+ .open = acp_dma_open,
+ .close = acp_dma_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = acp_dma_hw_params,
+ .hw_free = acp_dma_hw_free,
+ .trigger = acp_dma_trigger,
+ .pointer = acp_dma_pointer,
+ .mmap = acp_dma_mmap,
+ .prepare = acp_dma_prepare,
+};
+
+static struct snd_soc_platform_driver acp_asoc_platform = {
+ .ops = &acp_dma_ops,
+ .pcm_new = acp_dma_new,
+};
+
+static int acp_audio_probe(struct platform_device *pdev)
+{
+ int status;
+ struct audio_drv_data *audio_drv_data;
+ struct resource *res;
+ struct amd_acp_device *acp_dev = dev_get_platdata(&pdev->dev);
+
+ audio_drv_data = devm_kzalloc(&pdev->dev, sizeof(struct audio_drv_data),
+ GFP_KERNEL);
+ if (audio_drv_data == NULL)
+ return -ENOMEM;
+
+ audio_drv_data->iprv = devm_kzalloc(&pdev->dev,
+ sizeof(struct acp_irq_prv),
+ GFP_KERNEL);
+ if (audio_drv_data->iprv == NULL)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ audio_drv_data->acp_mmio = devm_ioremap_resource(&pdev->dev, res);
+
+ /* The following members gets populated in device 'open'
+ * function. Till then interrupts are disabled in 'acp_hw_init'
+ * and device doesn't generate any interrupts.
+ */
+
+ audio_drv_data->play_stream = NULL;
+ audio_drv_data->capture_stream = NULL;
+
+ audio_drv_data->iprv->dev = &pdev->dev;
+ audio_drv_data->iprv->acp_mmio = audio_drv_data->acp_mmio;
+ audio_drv_data->iprv->enable_intr = acp_enable_external_interrupts;
+ audio_drv_data->iprv->irq_handler = dma_irq_handler;
+
+ dev_set_drvdata(&pdev->dev, audio_drv_data);
+
+ /* Initialize the ACP */
+ acp_hw_init(audio_drv_data->acp_mmio);
+
+ acp_dev->irq_register(acp_dev, audio_drv_data->iprv);
+
+ status = snd_soc_register_platform(&pdev->dev, &acp_asoc_platform);
+ if (0 != status) {
+ dev_err(&pdev->dev, "Fail to register ALSA platform device\n");
+ return status;
+ }
+
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 10000);
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
+ return status;
+}
+
+static int acp_audio_remove(struct platform_device *pdev)
+{
+ struct audio_drv_data *adata = dev_get_drvdata(&pdev->dev);
+
+ acp_hw_deinit(adata->acp_mmio);
+ snd_soc_unregister_platform(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static int acp_pcm_suspend(struct device *dev)
+{
+ bool pm_rts;
+ struct audio_drv_data *adata = dev_get_drvdata(dev);
+
+ pm_rts = pm_runtime_status_suspended(dev);
+ if (pm_rts == false)
+ acp_suspend(adata->acp_mmio);
+
+ return 0;
+}
+
+static int acp_pcm_resume(struct device *dev)
+{
+ bool pm_rts;
+ struct snd_pcm_substream *stream;
+ struct snd_pcm_runtime *rtd;
+ struct audio_substream_data *sdata;
+ struct audio_drv_data *adata = dev_get_drvdata(dev);
+
+ pm_rts = pm_runtime_status_suspended(dev);
+ if (pm_rts == true) {
+ /* Resumed from system wide suspend and there is
+ * no pending audio activity to resume. */
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ goto out;
+ }
+
+ acp_resume(adata->acp_mmio);
+
+ stream = adata->play_stream;
+ rtd = stream ? stream->runtime : NULL;
+ if (rtd != NULL) {
+ /* Resume playback stream from a suspended state */
+ sdata = rtd->private_data;
+ config_acp_dma(adata->acp_mmio, sdata);
+ }
+
+ stream = adata->capture_stream;
+ rtd = stream ? stream->runtime : NULL;
+ if (rtd != NULL) {
+ /* Resume capture stream from a suspended state */
+ sdata = rtd->private_data;
+ config_acp_dma(adata->acp_mmio, sdata);
+ }
+out:
+ return 0;
+}
+
+static int acp_pcm_runtime_suspend(struct device *dev)
+{
+ struct audio_drv_data *adata = dev_get_drvdata(dev);
+
+ acp_suspend(adata->acp_mmio);
+ return 0;
+}
+
+static int acp_pcm_runtime_resume(struct device *dev)
+{
+ struct audio_drv_data *adata = dev_get_drvdata(dev);
+
+ acp_resume(adata->acp_mmio);
+ return 0;
+}
+
+static const struct dev_pm_ops acp_pm_ops = {
+ .suspend = acp_pcm_suspend,
+ .resume = acp_pcm_resume,
+ .runtime_suspend = acp_pcm_runtime_suspend,
+ .runtime_resume = acp_pcm_runtime_resume,
+};
+
+static struct platform_driver acp_dma_driver = {
+ .probe = acp_audio_probe,
+ .remove = acp_audio_remove,
+ .driver = {
+ .name = "acp_audio_dma",
+ .pm = &acp_pm_ops,
+ },
+};
+
+module_platform_driver(acp_dma_driver);
+
+MODULE_AUTHOR("Maruthi.Bayyavarapu at amd.com");
+MODULE_DESCRIPTION("AMD ACP PCM Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:acp-dma-audio");
diff --git a/sound/soc/amd/acp.c b/sound/soc/amd/acp.c
new file mode 100644
index 0000000..59ec312
--- /dev/null
+++ b/sound/soc/amd/acp.c
@@ -0,0 +1,736 @@
+/*
+ * AMD ACP module
+ *
+ * Copyright 2015 Advanced Micro Devices, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+*/
+
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <sound/asound.h>
+#include "acp.h"
+
+#include "include/acp_2_2_d.h"
+#include "include/acp_2_2_sh_mask.h"
+
+#define VISLANDS30_IV_SRCID_ACP 0x000000a2
+
+static u32 acp_reg_read(void __iomem *acp_mmio, u32 reg)
+{
+ return readl(acp_mmio + (reg * 4));
+}
+
+static void acp_reg_write(u32 val, void __iomem *acp_mmio, u32 reg)
+{
+ writel(val, acp_mmio + (reg * 4));
+}
+
+/* Configure a given dma channel parameters - enable/disble,
+ * number of descriptors, priority */
+void config_acp_dma_channel(void __iomem *acp_mmio, u8 ch_num,
+ u16 dscr_strt_idx, u16 num_dscrs,
+ enum acp_dma_priority_level priority_level)
+{
+ u32 dma_ctrl;
+
+ /* disable the channel run field */
+ dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+ dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRun_MASK;
+ acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+
+ /* program a DMA channel with first descriptor to be processed. */
+ acp_reg_write((ACP_DMA_DSCR_STRT_IDX_0__DMAChDscrStrtIdx_MASK
+ & dscr_strt_idx),
+ acp_mmio, mmACP_DMA_DSCR_STRT_IDX_0 + ch_num);
+
+ /* program a DMA channel with the number of descriptors to be
+ * processed in the transfer */
+ acp_reg_write(ACP_DMA_DSCR_CNT_0__DMAChDscrCnt_MASK & num_dscrs,
+ acp_mmio, mmACP_DMA_DSCR_CNT_0 + ch_num);
+
+ /* set DMA channel priority */
+ acp_reg_write(priority_level, acp_mmio, mmACP_DMA_PRIO_0 + ch_num);
+}
+
+/* Initialize the dma descriptors location in SRAM and page size */
+static void acp_dma_descr_init(void __iomem *acp_mmio)
+{
+ u32 sram_pte_offset = 0;
+
+ /* SRAM starts at 0x04000000. From that offset one page (4KB) left for
+ * filling DMA descriptors.sram_pte_offset = 0x04001000 , used for
+ * filling system RAM's physical pages.
+ * This becomes the ALSA's Ring buffer start address
+ */
+ sram_pte_offset = ACP_DAGB_GRP_SRAM_BASE_ADDRESS;
+
+ /* snoopable */
+ sram_pte_offset |= ACP_DAGB_BASE_ADDR_GRP_1__AXI2DAGBSnoopSel_MASK;
+ /* Memmory is system mmemory */
+ sram_pte_offset |= ACP_DAGB_BASE_ADDR_GRP_1__AXI2DAGBTargetMemSel_MASK;
+ /* Page Enabled */
+ sram_pte_offset |= ACP_DAGB_BASE_ADDR_GRP_1__AXI2DAGBGrpEnable_MASK;
+
+ acp_reg_write(sram_pte_offset, acp_mmio, mmACP_DAGB_BASE_ADDR_GRP_1);
+ acp_reg_write(PAGE_SIZE_4K_ENABLE, acp_mmio,
+ mmACP_DAGB_PAGE_SIZE_GRP_1);
+}
+
+/* Initialize a dma descriptor in SRAM based on descritor information passed */
+static void config_dma_descriptor_in_sram(void __iomem *acp_mmio,
+ u16 descr_idx,
+ acp_dma_dscr_transfer_t *descr_info)
+{
+ u32 sram_offset;
+
+ sram_offset = (descr_idx * sizeof(acp_dma_dscr_transfer_t));
+
+ /* program the source base address. */
+ acp_reg_write(sram_offset, acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
+ acp_reg_write(descr_info->src, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
+ /* program the destination base address. */
+ acp_reg_write(sram_offset + 4, acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
+ acp_reg_write(descr_info->dest, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
+
+ /* program the number of bytes to be transferred for this descriptor. */
+ acp_reg_write(sram_offset + 8, acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
+ acp_reg_write(descr_info->xfer_val, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
+}
+
+/* Initialize the DMA descriptor information for transfer between
+ * system memory <-> ACP SRAM
+ */
+static void set_acp_sysmem_dma_descriptors(void __iomem *acp_mmio,
+ u32 size, int direction,
+ u32 pte_offset)
+{
+ u16 num_descr;
+ u16 dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH12;
+ acp_dma_dscr_transfer_t dmadscr[2];
+
+ num_descr = 2;
+
+ dmadscr[0].xfer_val = 0;
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH12;
+ dmadscr[0].dest = ACP_SHARED_RAM_BANK_1_ADDRESS + (size / 2);
+ dmadscr[0].src = ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS +
+ (pte_offset * PAGE_SIZE_4K);
+ dmadscr[0].xfer_val |= (DISABLE << 22) |
+ (ACP_DMA_ATTRIBUTES_DAGB_ONION_TO_SHAREDMEM << 16) |
+ (size / 2);
+ } else {
+ dma_dscr_idx = CAPTURE_START_DMA_DESCR_CH14;
+ dmadscr[0].src = ACP_SHARED_RAM_BANK_5_ADDRESS;
+ dmadscr[0].dest = ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS +
+ (pte_offset * PAGE_SIZE_4K);
+ dmadscr[0].xfer_val |=
+ (ENABLE << 22) |
+ (ACP_DMA_ATTRIBUTES_SHAREDMEM_TO_DAGB_ONION << 16) |
+ (size / 2);
+ }
+
+ config_dma_descriptor_in_sram(acp_mmio, dma_dscr_idx, &dmadscr[0]);
+
+ dmadscr[1].xfer_val = 0;
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ dma_dscr_idx = PLAYBACK_END_DMA_DESCR_CH12;
+ dmadscr[1].dest = ACP_SHARED_RAM_BANK_1_ADDRESS;
+ dmadscr[1].src = ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS +
+ (pte_offset * PAGE_SIZE_4K) + (size / 2);
+ dmadscr[1].xfer_val |= (DISABLE << 22) |
+ (ACP_DMA_ATTRIBUTES_DAGB_ONION_TO_SHAREDMEM << 16) |
+ (size / 2);
+ } else {
+ dma_dscr_idx = CAPTURE_END_DMA_DESCR_CH14;
+ dmadscr[1].dest = dmadscr[0].dest + (size / 2);
+ dmadscr[1].src = dmadscr[0].src + (size / 2);
+ dmadscr[1].xfer_val |= (ENABLE << 22) |
+ (ACP_DMA_ATTRIBUTES_SHAREDMEM_TO_DAGB_ONION << 16) |
+ (size / 2);
+ }
+
+ config_dma_descriptor_in_sram(acp_mmio, dma_dscr_idx, &dmadscr[1]);
+
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* starting descriptor for this channel */
+ dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH12;
+ config_acp_dma_channel(acp_mmio, SYSRAM_TO_ACP_CH_NUM,
+ dma_dscr_idx, num_descr,
+ ACP_DMA_PRIORITY_LEVEL_NORMAL);
+ } else {
+ /* starting descriptor for this channel */
+ dma_dscr_idx = CAPTURE_START_DMA_DESCR_CH14;
+ config_acp_dma_channel(acp_mmio, ACP_TO_SYSRAM_CH_NUM,
+ dma_dscr_idx, num_descr,
+ ACP_DMA_PRIORITY_LEVEL_NORMAL);
+ }
+}
+
+/* Initialize the DMA descriptor information for transfer between
+ * ACP SRAM <-> I2S
+ */
+static void set_acp_to_i2s_dma_descriptors(void __iomem *acp_mmio,
+ u32 size, int direction)
+{
+
+ u16 num_descr;
+ u16 dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH13;
+ acp_dma_dscr_transfer_t dmadscr[2];
+
+ num_descr = 2;
+
+ dmadscr[0].xfer_val = 0;
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH13;
+ dmadscr[0].src = ACP_SHARED_RAM_BANK_1_ADDRESS;
+ /* dmadscr[0].dest is unused by hardware. Assgned to 0 to
+ * remove compiler warning */
+ dmadscr[0].dest = 0;
+ dmadscr[0].xfer_val |= (ENABLE << 22) | (TO_ACP_I2S_1 << 16) |
+ (size / 2);
+ } else {
+ dma_dscr_idx = CAPTURE_START_DMA_DESCR_CH15;
+ /* dmadscr[0].src is unused by hardware. Assgned to 0 to
+ * remove compiler warning */
+ dmadscr[0].src = 0;
+ dmadscr[0].dest = ACP_SHARED_RAM_BANK_5_ADDRESS;
+ dmadscr[0].xfer_val |= (ENABLE << 22) |
+ (FROM_ACP_I2S_1 << 16) | (size / 2);
+ }
+
+ config_dma_descriptor_in_sram(acp_mmio, dma_dscr_idx, &dmadscr[0]);
+
+ dmadscr[1].xfer_val = 0;
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ dma_dscr_idx = PLAYBACK_END_DMA_DESCR_CH13;
+ dmadscr[1].src = dmadscr[0].src + (size / 2);
+ /* dmadscr[1].dest is unused by hardware. Assgned to 0 to
+ * remove compiler warning */
+ dmadscr[1].dest = 0;
+ dmadscr[1].xfer_val |= (ENABLE << 22) | (TO_ACP_I2S_1 << 16) |
+ (size / 2);
+ } else {
+ dma_dscr_idx = CAPTURE_END_DMA_DESCR_CH15;
+ /* dmadscr[1].src is unused by hardware. Assgned to 0 to
+ * remove compiler warning */
+ dmadscr[1].src = 0;
+ dmadscr[1].dest = dmadscr[0].dest + (size / 2);
+ dmadscr[1].xfer_val |= (ENABLE << 22) |
+ (FROM_ACP_I2S_1 << 16) | (size / 2);
+ }
+
+ config_dma_descriptor_in_sram(acp_mmio, dma_dscr_idx, &dmadscr[1]);
+
+ /* Configure the DMA channel with the above descriptore */
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* starting descriptor for this channel */
+ dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH13;
+ config_acp_dma_channel(acp_mmio, ACP_TO_I2S_DMA_CH_NUM,
+ dma_dscr_idx, num_descr,
+ ACP_DMA_PRIORITY_LEVEL_NORMAL);
+ } else {
+ /* starting descriptor for this channel */
+ dma_dscr_idx = CAPTURE_START_DMA_DESCR_CH15;
+ config_acp_dma_channel(acp_mmio, I2S_TO_ACP_DMA_CH_NUM,
+ dma_dscr_idx, num_descr,
+ ACP_DMA_PRIORITY_LEVEL_NORMAL);
+ }
+
+}
+
+u16 get_dscr_idx(void __iomem *acp_mmio, int direction)
+{
+ u16 dscr_idx;
+
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ dscr_idx = acp_reg_read(acp_mmio, mmACP_DMA_CUR_DSCR_13);
+ dscr_idx = (dscr_idx == PLAYBACK_START_DMA_DESCR_CH13) ?
+ PLAYBACK_START_DMA_DESCR_CH12 :
+ PLAYBACK_END_DMA_DESCR_CH12;
+ } else {
+ dscr_idx = acp_reg_read(acp_mmio, mmACP_DMA_CUR_DSCR_15);
+ dscr_idx = (dscr_idx == CAPTURE_START_DMA_DESCR_CH15) ?
+ CAPTURE_END_DMA_DESCR_CH14 :
+ CAPTURE_START_DMA_DESCR_CH14;
+ }
+
+ return dscr_idx;
+}
+
+/* Create page table entries in ACP SRAM for the allocated memory */
+static void acp_pte_config(void __iomem *acp_mmio, struct page *pg,
+ u16 num_of_pages, u32 pte_offset)
+{
+ u16 page_idx;
+ u64 addr;
+ u32 low;
+ u32 high;
+ u32 offset;
+
+ offset = ACP_DAGB_GRP_SRBM_SRAM_BASE_OFFSET + (pte_offset * 8);
+ for (page_idx = 0; page_idx < (num_of_pages); page_idx++) {
+ /* Load the low address of page int ACP SRAM through SRBM */
+ acp_reg_write((offset + (page_idx * 8)),
+ acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
+ addr = page_to_phys(pg);
+
+ low = lower_32_bits(addr);
+ high = upper_32_bits(addr);
+
+ acp_reg_write(low, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
+
+ /* Load the High address of page int ACP SRAM through SRBM */
+ acp_reg_write((offset + (page_idx * 8) + 4),
+ acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
+
+ /* page enable in ACP */
+ high |= BIT(31);
+ acp_reg_write(high, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
+
+ /* Move to next physically contiguos page */
+ pg++;
+ }
+}
+
+/* enables/disables ACP's external interrupt */
+void acp_enable_external_interrupts(void __iomem *acp_mmio,
+ int enable)
+{
+ u32 acp_ext_intr_enb;
+
+ acp_ext_intr_enb = enable ?
+ ACP_EXTERNAL_INTR_ENB__ACPExtIntrEnb_MASK : 0;
+
+ /* Write the Software External Interrupt Enable register */
+ acp_reg_write(acp_ext_intr_enb, acp_mmio, mmACP_EXTERNAL_INTR_ENB);
+}
+
+/* Clear (acknowledge) DMA 'Interrupt on Complete' (IOC) in ACP
+ * external interrupt status register
+ */
+void acp_ext_stat_clear_dmaioc(void __iomem *acp_mmio, u8 ch_num)
+{
+ u32 ext_intr_stat;
+ u32 chmask = BIT(ch_num);
+
+ ext_intr_stat = acp_reg_read(acp_mmio, mmACP_EXTERNAL_INTR_STAT);
+ if (ext_intr_stat & (chmask <<
+ ACP_EXTERNAL_INTR_STAT__DMAIOCStat__SHIFT)) {
+
+ ext_intr_stat &= (chmask <<
+ ACP_EXTERNAL_INTR_STAT__DMAIOCAck__SHIFT);
+ acp_reg_write(ext_intr_stat, acp_mmio,
+ mmACP_EXTERNAL_INTR_STAT);
+ }
+}
+
+/* Check whether ACP DMA interrupt (IOC) is generated or not */
+u32 acp_get_intr_flag(void __iomem *acp_mmio)
+{
+ u32 ext_intr_status;
+ u32 intr_gen;
+
+ ext_intr_status = acp_reg_read(acp_mmio, mmACP_EXTERNAL_INTR_STAT);
+ intr_gen = (((ext_intr_status &
+ ACP_EXTERNAL_INTR_STAT__DMAIOCStat_MASK) >>
+ ACP_EXTERNAL_INTR_STAT__DMAIOCStat__SHIFT));
+
+ return intr_gen;
+}
+
+void config_acp_dma(void __iomem *acp_mmio,
+ struct audio_substream_data *audio_config)
+{
+ u32 pte_offset;
+
+ if (audio_config->direction == SNDRV_PCM_STREAM_PLAYBACK)
+ pte_offset = PLAYBACK_PTE_OFFSET;
+ else
+ pte_offset = CAPTURE_PTE_OFFSET;
+
+ acp_pte_config(acp_mmio, audio_config->pg, audio_config->num_of_pages,
+ pte_offset);
+
+ /* Configure System memory <-> ACP SRAM DMA descriptors */
+ set_acp_sysmem_dma_descriptors(acp_mmio, audio_config->size,
+ audio_config->direction, pte_offset);
+
+ /* Configure ACP SRAM <-> I2S DMA descriptors */
+ set_acp_to_i2s_dma_descriptors(acp_mmio, audio_config->size,
+ audio_config->direction);
+}
+
+/* Start a given DMA channel transfer */
+void acp_dma_start(void __iomem *acp_mmio,
+ u16 ch_num, bool is_circular)
+{
+ u32 dma_ctrl;
+
+ /* read the dma control register and disable the channel run field */
+ dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+
+ /*Invalidating the DAGB cache */
+ acp_reg_write(ENABLE, acp_mmio, mmACP_DAGB_ATU_CTRL);
+
+ /* configure the DMA channel and start the DMA transfer
+ * set dmachrun bit to start the transfer and enable the
+ * interrupt on completion of the dma transfer
+ */
+ dma_ctrl |= ACP_DMA_CNTL_0__DMAChRun_MASK;
+
+ if ((ch_num == ACP_TO_I2S_DMA_CH_NUM) ||
+ (ch_num == ACP_TO_SYSRAM_CH_NUM) ||
+ (ch_num == I2S_TO_ACP_DMA_CH_NUM))
+ dma_ctrl |= ACP_DMA_CNTL_0__DMAChIOCEn_MASK;
+ else
+ dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChIOCEn_MASK;
+
+ /* enable for ACP SRAM to/from I2S DMA channel */
+ if (is_circular == true)
+ dma_ctrl |= ACP_DMA_CNTL_0__Circular_DMA_En_MASK;
+ else
+ dma_ctrl &= ~ACP_DMA_CNTL_0__Circular_DMA_En_MASK;
+
+ acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+}
+
+/* Stop a given DMA channel transfer */
+void acp_dma_stop(void __iomem *acp_mmio, u8 ch_num)
+{
+ u32 dma_ctrl;
+ u32 dma_ch_sts;
+ u32 delay_time = ACP_DMA_RESET_TIME;
+
+ dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+
+ /* clear the dma control register fields before writing zero
+ * in reset bit
+ */
+ dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRun_MASK;
+ dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChIOCEn_MASK;
+
+ acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+ dma_ch_sts = acp_reg_read(acp_mmio, mmACP_DMA_CH_STS);
+
+ if (dma_ch_sts & BIT(ch_num)) {
+ /* set the reset bit for this channel
+ * to stop the dma transfer */
+ dma_ctrl |= ACP_DMA_CNTL_0__DMAChRst_MASK;
+ acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+ }
+
+ /* check the channel status bit for some time and return the status */
+ while (0 < delay_time) {
+ dma_ch_sts = acp_reg_read(acp_mmio, mmACP_DMA_CH_STS);
+ if (!(dma_ch_sts & BIT(ch_num))) {
+ /* clear the reset flag after successfully stopping
+ the dma transfer and break from the loop */
+ dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRst_MASK;
+
+ acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0
+ + ch_num);
+ break;
+ }
+ delay_time--;
+ }
+}
+
+/* power off a tile/block within ACP */
+static void acp_suspend_tile(void __iomem *acp_mmio, int tile)
+{
+ u32 val = 0;
+ u32 timeout = 0;
+
+ if ((tile < ACP_TILE_P1) || (tile > ACP_TILE_DSP2))
+ return;
+
+ val = acp_reg_read(acp_mmio, mmACP_PGFSM_READ_REG_0 + tile);
+ val &= ACP_TILE_ON_MASK;
+
+ if (val == 0x0) {
+ val = acp_reg_read(acp_mmio, mmACP_PGFSM_RETAIN_REG);
+ val = val | (1 << tile);
+ acp_reg_write(val, acp_mmio, mmACP_PGFSM_RETAIN_REG);
+ acp_reg_write(0x500 + tile, acp_mmio, mmACP_PGFSM_CONFIG_REG);
+
+ timeout = ACP_SOFT_RESET_DONE_TIME_OUT_VALUE;
+ while (timeout--) {
+ val = acp_reg_read(acp_mmio, mmACP_PGFSM_READ_REG_0
+ + tile);
+ val = val & ACP_TILE_ON_MASK;
+ if (val == ACP_TILE_OFF_MASK)
+ break;
+ }
+
+ val = acp_reg_read(acp_mmio, mmACP_PGFSM_RETAIN_REG);
+
+ val |= ACP_TILE_OFF_RETAIN_REG_MASK;
+ acp_reg_write(val, acp_mmio, mmACP_PGFSM_RETAIN_REG);
+ }
+}
+
+/* power on a tile/block within ACP */
+static void acp_resume_tile(void __iomem *acp_mmio, int tile)
+{
+ u32 val = 0;
+ u32 timeout = 0;
+
+ if ((tile < ACP_TILE_P1) || (tile > ACP_TILE_DSP2))
+ return;
+
+ val = acp_reg_read(acp_mmio, mmACP_PGFSM_READ_REG_0 + tile);
+ val = val & ACP_TILE_ON_MASK;
+
+ if (val != 0x0) {
+ acp_reg_write(0x600 + tile, acp_mmio, mmACP_PGFSM_CONFIG_REG);
+ timeout = ACP_SOFT_RESET_DONE_TIME_OUT_VALUE;
+ while (timeout--) {
+ val = acp_reg_read(acp_mmio, mmACP_PGFSM_READ_REG_0
+ + tile);
+ val = val & ACP_TILE_ON_MASK;
+ if (val == 0x0)
+ break;
+ }
+ val = acp_reg_read(acp_mmio, mmACP_PGFSM_RETAIN_REG);
+ if (tile == ACP_TILE_P1)
+ val = val & (ACP_TILE_P1_MASK);
+ else if (tile == ACP_TILE_P2)
+ val = val & (ACP_TILE_P2_MASK);
+
+ acp_reg_write(val, acp_mmio, mmACP_PGFSM_RETAIN_REG);
+ }
+}
+
+/* Shutdown unused SRAM memory banks in ACP IP */
+static void acp_turnoff_sram_banks(void __iomem *acp_mmio)
+{
+ /* Bank 0 : used for DMA descriptors
+ * Bank 1 to 4 : used for playback
+ * Bank 5 to 8 : used for capture
+ * Each bank is 8kB and max size allocated for playback/ capture is
+ * 16kB(max period size) * 2(max periods) reserved for playback/capture
+ * in ALSA driver
+ * Turn off all SRAM banks except above banks during playback/capture
+ */
+ u32 val, bank;
+
+ for (bank = 9; bank < 32; bank++) {
+ val = acp_reg_read(acp_mmio, mmACP_MEM_SHUT_DOWN_REQ_LO);
+ if (!(val & (1 << bank))) {
+ val |= 1 << bank;
+ acp_reg_write(val, acp_mmio,
+ mmACP_MEM_SHUT_DOWN_REQ_LO);
+ /* If ACP_MEM_SHUT_DOWN_STS_LO is 0xFFFFFFFF, then
+ * shutdown sequence is complete. */
+ do {
+ val = acp_reg_read(acp_mmio,
+ mmACP_MEM_SHUT_DOWN_STS_LO);
+ } while (val != 0xFFFFFFFF);
+ }
+ }
+
+ for (bank = 32; bank < 48; bank++) {
+ val = acp_reg_read(acp_mmio, mmACP_MEM_SHUT_DOWN_REQ_HI);
+ if (!(val & (1 << (bank - 32)))) {
+ val |= 1 << (bank - 32);
+ acp_reg_write(val, acp_mmio,
+ mmACP_MEM_SHUT_DOWN_REQ_HI);
+ /* If ACP_MEM_SHUT_DOWN_STS_HI is 0x0000FFFF, then
+ * shutdown sequence is complete. */
+ do {
+ val = acp_reg_read(acp_mmio,
+ mmACP_MEM_SHUT_DOWN_STS_HI);
+ } while (val != 0x0000FFFF);
+ }
+ }
+}
+
+/* Initialize and bring ACP hardware to default state. */
+static void acp_init(void __iomem *acp_mmio)
+{
+ u32 val;
+ u32 timeout_value;
+
+ /* Assert Soft reset of ACP */
+ val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
+
+ val |= ACP_SOFT_RESET__SoftResetAud_MASK;
+ acp_reg_write(val, acp_mmio, mmACP_SOFT_RESET);
+
+ timeout_value = ACP_SOFT_RESET_DONE_TIME_OUT_VALUE;
+ while (timeout_value--) {
+ val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
+ if (ACP_SOFT_RESET__SoftResetAudDone_MASK ==
+ (val & ACP_SOFT_RESET__SoftResetAudDone_MASK))
+ break;
+ }
+
+ /* Enable clock to ACP and wait until the clock is enabled */
+ val = acp_reg_read(acp_mmio, mmACP_CONTROL);
+ val = val | ACP_CONTROL__ClkEn_MASK;
+ acp_reg_write(val, acp_mmio, mmACP_CONTROL);
+
+ timeout_value = ACP_CLOCK_EN_TIME_OUT_VALUE;
+
+ while (timeout_value--) {
+ val = acp_reg_read(acp_mmio, mmACP_STATUS);
+ if (val & (u32) 0x1)
+ break;
+ udelay(100);
+ }
+
+ /* Deassert the SOFT RESET flags */
+ val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
+ val &= ~ACP_SOFT_RESET__SoftResetAud_MASK;
+ acp_reg_write(val, acp_mmio, mmACP_SOFT_RESET);
+
+ /* initiailizing Garlic Control DAGB register */
+ acp_reg_write(ONION_CNTL_DEFAULT, acp_mmio, mmACP_AXI2DAGB_ONION_CNTL);
+
+ /* initiailizing Onion Control DAGB registers */
+ acp_reg_write(GARLIC_CNTL_DEFAULT, acp_mmio,
+ mmACP_AXI2DAGB_GARLIC_CNTL);
+
+ acp_dma_descr_init(acp_mmio);
+
+ acp_reg_write(ACP_SRAM_BASE_ADDRESS, acp_mmio,
+ mmACP_DMA_DESC_BASE_ADDR);
+
+ /* Num of descriptiors in SRAM 0x4, means 256 descriptors;(64 * 4) */
+ acp_reg_write(0x4, acp_mmio, mmACP_DMA_DESC_MAX_NUM_DSCR);
+ acp_reg_write(ACP_EXTERNAL_INTR_CNTL__DMAIOCMask_MASK,
+ acp_mmio, mmACP_EXTERNAL_INTR_CNTL);
+
+ acp_turnoff_sram_banks(acp_mmio);
+}
+
+void acp_hw_init(void __iomem *acp_mmio)
+{
+ acp_init(acp_mmio);
+
+ /* Disable DSPs which are not used */
+ acp_suspend_tile(acp_mmio, ACP_TILE_DSP0);
+ acp_suspend_tile(acp_mmio, ACP_TILE_DSP1);
+ acp_suspend_tile(acp_mmio, ACP_TILE_DSP2);
+}
+
+/* Deintialize ACP */
+void acp_hw_deinit(void __iomem *acp_mmio)
+{
+ u32 val;
+ u32 timeout_value;
+
+ /* Assert Soft reset of ACP */
+ val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
+
+ val |= ACP_SOFT_RESET__SoftResetAud_MASK;
+ acp_reg_write(val, acp_mmio, mmACP_SOFT_RESET);
+
+ timeout_value = ACP_SOFT_RESET_DONE_TIME_OUT_VALUE;
+ while (timeout_value--) {
+ val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
+ if (ACP_SOFT_RESET__SoftResetAudDone_MASK ==
+ (val & ACP_SOFT_RESET__SoftResetAudDone_MASK)) {
+ break;
+ }
+ }
+ /** Disable ACP clock */
+ val = acp_reg_read(acp_mmio, mmACP_CONTROL);
+ val &= ~ACP_CONTROL__ClkEn_MASK;
+ acp_reg_write(val, acp_mmio, mmACP_CONTROL);
+
+ timeout_value = ACP_CLOCK_EN_TIME_OUT_VALUE;
+
+ while (timeout_value--) {
+ val = acp_reg_read(acp_mmio, mmACP_STATUS);
+ if (!(val & (u32) 0x1))
+ break;
+ udelay(100);
+ }
+}
+
+/* Update DMA postion in audio ring buffer at period level granularity.
+ * This will be used by ALSA PCM driver
+ */
+u32 acp_update_dma_pointer(void __iomem *acp_mmio, int direction,
+ u32 period_size)
+{
+ u32 pos;
+ u16 dscr;
+ u32 mul;
+ u32 dma_config;
+
+ pos = 0;
+
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ dscr = acp_reg_read(acp_mmio, mmACP_DMA_CUR_DSCR_13);
+
+ mul = (dscr == PLAYBACK_START_DMA_DESCR_CH13) ? 0 : 1;
+ pos = (mul * period_size);
+
+ } else {
+ dma_config = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_14);
+ if (dma_config != 0) {
+ dscr = acp_reg_read(acp_mmio, mmACP_DMA_CUR_DSCR_14);
+ mul = (dscr == CAPTURE_START_DMA_DESCR_CH14) ? 1 : 2;
+ pos = (mul * period_size);
+ }
+
+ if (pos >= (2 * period_size))
+ pos = 0;
+
+ }
+ return pos;
+}
+
+/* Wait for initial buffering to complete in HOST to SRAM DMA channel
+ * for plaback usecase
+ */
+void prebuffer_audio(void __iomem *acp_mmio)
+{
+ u32 dma_ch_sts;
+ u32 channel_mask = BIT(SYSRAM_TO_ACP_CH_NUM);
+
+ do {
+ /* Read the channel status to poll dma transfer completion
+ * (System RAM to SRAM)
+ * In this case, it will be runtime->start_threshold
+ * (2 ALSA periods) of transfer. Rendering starts after this
+ * threshold is met.
+ */
+ dma_ch_sts = acp_reg_read(acp_mmio, mmACP_DMA_CH_STS);
+ udelay(20);
+ } while (dma_ch_sts & channel_mask);
+}
+
+void acp_suspend(void __iomem *acp_mmio)
+{
+ acp_suspend_tile(acp_mmio, ACP_TILE_P2);
+ acp_suspend_tile(acp_mmio, ACP_TILE_P1);
+}
+
+void acp_resume(void __iomem *acp_mmio)
+{
+ acp_resume_tile(acp_mmio, ACP_TILE_P1);
+ acp_resume_tile(acp_mmio, ACP_TILE_P2);
+
+ acp_init(acp_mmio);
+
+ /* Disable DSPs which are not going to be used */
+ acp_suspend_tile(acp_mmio, ACP_TILE_DSP0);
+ acp_suspend_tile(acp_mmio, ACP_TILE_DSP1);
+ acp_suspend_tile(acp_mmio, ACP_TILE_DSP2);
+}
diff --git a/sound/soc/amd/acp.h b/sound/soc/amd/acp.h
new file mode 100644
index 0000000..4e4417f
--- /dev/null
+++ b/sound/soc/amd/acp.h
@@ -0,0 +1,147 @@
+#ifndef __ACP_HW_H
+#define __ACP_HW_H
+
+#define ACP_MODE_I2S 0
+#define ACP_MODE_AZ 1
+
+#define DISABLE 0
+#define ENABLE 1
+
+#define PAGE_SIZE_4K 4096
+#define PAGE_SIZE_4K_ENABLE 0x02
+
+#define PLAYBACK_PTE_OFFSET 10
+#define CAPTURE_PTE_OFFSET 0
+
+#define GARLIC_CNTL_DEFAULT 0x00000FB4
+#define ONION_CNTL_DEFAULT 0x00000FB4
+
+#define ACP_PHYSICAL_BASE 0x14000
+
+/* Playback SRAM address (as a destination in dma descriptor) */
+#define ACP_SHARED_RAM_BANK_1_ADDRESS 0x4002000
+
+/* Capture SRAM address (as a source in dma descriptor) */
+#define ACP_SHARED_RAM_BANK_5_ADDRESS 0x400A000
+
+#define ACP_DMA_RESET_TIME 10000
+#define ACP_CLOCK_EN_TIME_OUT_VALUE 0x000000FF
+#define ACP_SOFT_RESET_DONE_TIME_OUT_VALUE 0x000000FF
+#define ACP_DMA_COMPLETE_TIME_OUT_VALUE 0x000000FF
+
+#define ACP_SRAM_BASE_ADDRESS 0x4000000
+#define ACP_DAGB_GRP_SRAM_BASE_ADDRESS 0x4001000
+#define ACP_DAGB_GRP_SRBM_SRAM_BASE_OFFSET 0x1000
+#define ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS 0x00000000
+#define ACP_INTERNAL_APERTURE_WINDOW_4_ADDRESS 0x01800000
+
+#define TO_ACP_I2S_1 0x2
+#define TO_ACP_I2S_2 0x4
+#define FROM_ACP_I2S_1 0xa
+#define FROM_ACP_I2S_2 0xb
+
+#define ACP_TILE_ON_MASK 0x03
+#define ACP_TILE_OFF_MASK 0x02
+#define ACP_TILE_ON_RETAIN_REG_MASK 0x1f
+#define ACP_TILE_OFF_RETAIN_REG_MASK 0x20
+
+#define ACP_TILE_P1_MASK 0x3e
+#define ACP_TILE_P2_MASK 0x3d
+#define ACP_TILE_DSP0_MASK 0x3b
+#define ACP_TILE_DSP1_MASK 0x37
+
+#define ACP_TILE_DSP2_MASK 0x2f
+/* Playback DMA channels */
+#define SYSRAM_TO_ACP_CH_NUM 12
+#define ACP_TO_I2S_DMA_CH_NUM 13
+
+/* Capture DMA channels */
+#define ACP_TO_SYSRAM_CH_NUM 14
+#define I2S_TO_ACP_DMA_CH_NUM 15
+
+#define PLAYBACK_START_DMA_DESCR_CH12 0
+#define PLAYBACK_END_DMA_DESCR_CH12 1
+
+#define PLAYBACK_START_DMA_DESCR_CH13 2
+#define PLAYBACK_END_DMA_DESCR_CH13 3
+
+
+#define CAPTURE_START_DMA_DESCR_CH14 4
+#define CAPTURE_END_DMA_DESCR_CH14 5
+
+#define CAPTURE_START_DMA_DESCR_CH15 6
+#define CAPTURE_END_DMA_DESCR_CH15 7
+
+#define STATUS_SUCCESS 0
+#define STATUS_UNSUCCESSFUL -1
+
+enum acp_dma_priority_level {
+ /* 0x0 Specifies the DMA channel is given normal priority */
+ ACP_DMA_PRIORITY_LEVEL_NORMAL = 0x0,
+ /* 0x1 Specifies the DMA channel is given high priority */
+ ACP_DMA_PRIORITY_LEVEL_HIGH = 0x1,
+ ACP_DMA_PRIORITY_LEVEL_FORCESIZE = 0xFF
+};
+
+struct audio_substream_data {
+ struct page *pg;
+ unsigned int order;
+ u16 num_of_pages;
+ u16 direction;
+ uint64_t size;
+ void __iomem *acp_mmio;
+};
+
+enum {
+ ACP_TILE_P1 = 0,
+ ACP_TILE_P2,
+ ACP_TILE_DSP0,
+ ACP_TILE_DSP1,
+ ACP_TILE_DSP2,
+};
+
+enum {
+ ACP_DMA_ATTRIBUTES_SHAREDMEM_TO_DAGB_ONION = 0x0,
+ ACP_DMA_ATTRIBUTES_SHARED_MEM_TO_DAGB_GARLIC = 0x1,
+ ACP_DMA_ATTRIBUTES_DAGB_ONION_TO_SHAREDMEM = 0x8,
+ ACP_DMA_ATTRIBUTES_DAGB_GARLIC_TO_SHAREDMEM = 0x9,
+ ACP_DMA_ATTRIBUTES_FORCE_SIZE = 0xF
+};
+
+typedef struct acp_dma_dscr_transfer {
+ /* Specifies the source memory location for the DMA data transfer. */
+ u32 src;
+ /* Specifies the destination memory location to where the data will
+ be transferred.
+ */
+ u32 dest;
+ /* Specifies the number of bytes need to be transferred
+ * from source to destination memory.Transfer direction & IOC enable
+ */
+ u32 xfer_val;
+ /** Reserved for future use */
+ u32 reserved;
+} acp_dma_dscr_transfer_t;
+
+extern void acp_hw_init(void __iomem *acp_mmio);
+extern void acp_hw_deinit(void __iomem *acp_mmio);
+extern void config_acp_dma_channel(void __iomem *acp_mmio, u8 ch_num,
+ u16 dscr_strt_idx, u16 num_dscrs,
+ enum acp_dma_priority_level priority_level);
+extern void config_acp_dma(void __iomem *acp_mmio,
+ struct audio_substream_data *audio_config);
+extern void acp_dma_start(void __iomem *acp_mmio,
+ u16 ch_num, bool is_circular);
+extern void acp_dma_stop(void __iomem *acp_mmio, u8 ch_num);
+extern u32 acp_update_dma_pointer(void __iomem *acp_mmio, int direction,
+ u32 period_size);
+extern void prebuffer_audio(void __iomem *acp_mmio);
+extern void acp_suspend(void __iomem *acp_mmio);
+extern void acp_resume(void __iomem *acp_mmio);
+extern void acp_enable_external_interrupts(void __iomem *acp_mmio,
+ int enable);
+extern u32 acp_get_intr_flag(void __iomem *acp_mmio);
+extern u16 get_dscr_idx(void __iomem *acp_mmio, int direction);
+extern void acp_ext_stat_clear_dmaioc(void __iomem *acp_mmio, u8 ch_num);
+
+#endif /*__ACP_HW_H */
--
1.8.3.1
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