From: Maruthi Srinivas Bayyavarapu Maruthi.Bayyavarapu@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@amd.com Reviewed-by: Alex Deucher alexander.deucher@amd.com Reviewed-by: Murali Krishna Vemuri murali-krishna.vemuri@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 1d651b8..115264c 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 669648b..9400ec3 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@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 */