diff options
Diffstat (limited to 'testing/linux-amlogic/0006-ASoC-meson-add-aiu-spdif-dma-support.patch')
| -rw-r--r-- | testing/linux-amlogic/0006-ASoC-meson-add-aiu-spdif-dma-support.patch | 443 |
1 files changed, 443 insertions, 0 deletions
diff --git a/testing/linux-amlogic/0006-ASoC-meson-add-aiu-spdif-dma-support.patch b/testing/linux-amlogic/0006-ASoC-meson-add-aiu-spdif-dma-support.patch new file mode 100644 index 0000000000..31cef2e53d --- /dev/null +++ b/testing/linux-amlogic/0006-ASoC-meson-add-aiu-spdif-dma-support.patch @@ -0,0 +1,443 @@ +From 32a55958cc2d89e2feee831ca4e6ceae8458e950 Mon Sep 17 00:00:00 2001 +From: Jerome Brunet <jbrunet@baylibre.com> +Date: Thu, 30 Mar 2017 13:43:52 +0200 +Subject: [PATCH] ASoC: meson: add aiu spdif dma support + +Add support for the spdif output dma which is part of the AIU block + +Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> + +--- + sound/soc/meson/Kconfig | 7 + + sound/soc/meson/Makefile | 4 +- + sound/soc/meson/aiu-spdif-dma.c | 388 ++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 398 insertions(+), 1 deletion(-) + create mode 100644 sound/soc/meson/aiu-spdif-dma.c + +diff --git a/sound/soc/meson/Kconfig b/sound/soc/meson/Kconfig +index 5904e9e..712303f 100644 +--- a/sound/soc/meson/Kconfig ++++ b/sound/soc/meson/Kconfig +@@ -80,3 +80,10 @@ config SND_SOC_MESON_I2S + help + Say Y or M if you want to add support for i2s driver for Amlogic + Meson SoCs. ++ ++config SND_SOC_MESON_SPDIF ++ tristate "Meson spdif interface" ++ depends on SND_SOC_MESON ++ help ++ Say Y or M if you want to add support for spdif dma driver for Amlogic ++ Meson SoCs. +diff --git a/sound/soc/meson/Makefile b/sound/soc/meson/Makefile +index b8641f9..dc5164a7 100644 +--- a/sound/soc/meson/Makefile ++++ b/sound/soc/meson/Makefile +@@ -22,8 +22,10 @@ obj-$(CONFIG_SND_MESON_AXG_SPDIFOUT) += snd-soc-meson-axg-spdifout.o + + snd-soc-meson-audio-core-objs := audio-core.o + snd-soc-meson-aiu-i2s-dma-objs := aiu-i2s-dma.o ++snd-soc-meson-aiu-spdif-dma-objs := aiu-spdif-dma.o + snd-soc-meson-i2s-dai-objs := i2s-dai.o + + obj-$(CONFIG_SND_SOC_MESON) += snd-soc-meson-audio-core.o + obj-$(CONFIG_SND_SOC_MESON_I2S) += snd-soc-meson-aiu-i2s-dma.o +-obj-$(CONFIG_SND_SOC_MESON_I2S) += snd-soc-meson-i2s-dai.o +\ No newline at end of file ++obj-$(CONFIG_SND_SOC_MESON_I2S) += snd-soc-meson-i2s-dai.o ++obj-$(CONFIG_SND_SOC_MESON_SPDIF) += snd-soc-meson-aiu-spdif-dma.o +\ No newline at end of file +diff --git a/sound/soc/meson/aiu-spdif-dma.c b/sound/soc/meson/aiu-spdif-dma.c +new file mode 100644 +index 0000000..81c3b85 +--- /dev/null ++++ b/sound/soc/meson/aiu-spdif-dma.c +@@ -0,0 +1,388 @@ ++/* ++ * Copyright (C) 2017 BayLibre, SAS ++ * Author: Jerome Brunet <jbrunet@baylibre.com> ++ * Copyright (C) 2017 Amlogic, Inc. All rights reserved. ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License as ++ * published by the Free Software Foundation; either version 2 of the ++ * License, or (at your option) any later version. ++ * ++ * This program is distributed in the hope that 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. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, see <http://www.gnu.org/licenses/>. ++ */ ++ ++#include <linux/clk.h> ++#include <linux/mfd/syscon.h> ++#include <linux/module.h> ++#include <linux/of.h> ++#include <linux/platform_device.h> ++#include <linux/regmap.h> ++ ++#include <sound/pcm_params.h> ++#include <sound/soc.h> ++ ++#include "aiu-regs.h" ++#include "audio-core.h" ++ ++#define DRV_NAME "meson-aiu-spdif-dma" ++ ++struct aiu_spdif_dma { ++ struct meson_audio_core_data *core; ++ struct clk *fast; ++ int irq; ++}; ++ ++#define AIU_958_DCU_FF_CTRL_EN BIT(0) ++#define AIU_958_DCU_FF_CTRL_AUTO_DISABLE BIT(1) ++#define AIU_958_DCU_FF_CTRL_IRQ_MODE_MASK GENMASK(3, 2) ++#define AIU_958_DCU_FF_CTRL_IRQ_OUT_THD BIT(2) ++#define AIU_958_DCU_FF_CTRL_IRQ_FRAME_READ BIT(3) ++#define AIU_958_DCU_FF_CTRL_SYNC_HEAD_EN BIT(4) ++#define AIU_958_DCU_FF_CTRL_BYTE_SEEK BIT(5) ++#define AIU_958_DCU_FF_CTRL_CONTINUE BIT(6) ++#define AIU_MEM_IEC958_BUF_CNTL_INIT BIT(0) ++#define AIU_MEM_IEC958_CONTROL_INIT BIT(0) ++#define AIU_MEM_IEC958_CONTROL_FILL_EN BIT(1) ++#define AIU_MEM_IEC958_CONTROL_EMPTY_EN BIT(2) ++#define AIU_MEM_IEC958_CONTROL_ENDIAN_MASK GENMASK(5, 3) ++#define AIU_MEM_IEC958_CONTROL_RD_DDR BIT(6) ++#define AIU_MEM_IEC958_CONTROL_MODE_16BIT BIT(7) ++#define AIU_MEM_IEC958_MASKS_CH_MEM_MASK GENMASK(15, 8) ++#define AIU_MEM_IEC958_MASKS_CH_MEM(ch) ((ch) << 8) ++#define AIU_MEM_IEC958_MASKS_CH_RD_MASK GENMASK(7, 0) ++#define AIU_MEM_IEC958_MASKS_CH_RD(ch) ((ch) << 0) ++ ++#define AIU_SPDIF_DMA_BURST 8 ++#define AIU_SPDIF_BPF_MAX USHRT_MAX ++ ++static struct snd_pcm_hardware aiu_spdif_dma_hw = { ++ .info = (SNDRV_PCM_INFO_INTERLEAVED | ++ SNDRV_PCM_INFO_MMAP | ++ SNDRV_PCM_INFO_MMAP_VALID | ++ SNDRV_PCM_INFO_PAUSE), ++ ++ .formats = (SNDRV_PCM_FMTBIT_S16_LE | ++ SNDRV_PCM_FMTBIT_S24_LE | ++ SNDRV_PCM_FMTBIT_S32_LE), ++ ++ .rates = (SNDRV_PCM_RATE_32000 | ++ SNDRV_PCM_RATE_44100 | ++ SNDRV_PCM_RATE_48000 | ++ SNDRV_PCM_RATE_96000 | ++ SNDRV_PCM_RATE_192000), ++ /* ++ * TODO: The DMA can change the endianness, the msb position ++ * and deal with unsigned - support this later on ++ */ ++ ++ .channels_min = 2, ++ .channels_max = 2, ++ .period_bytes_min = AIU_SPDIF_DMA_BURST, ++ .period_bytes_max = AIU_SPDIF_BPF_MAX, ++ .periods_min = 2, ++ .periods_max = UINT_MAX, ++ .buffer_bytes_max = 1 * 1024 * 1024, ++ .fifo_size = 0, ++}; ++ ++static struct aiu_spdif_dma *aiu_spdif_dma_priv(struct snd_pcm_substream *s) ++{ ++ struct snd_soc_pcm_runtime *rtd = s->private_data; ++ struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME); ++ ++ return snd_soc_component_get_drvdata(component); ++} ++ ++static snd_pcm_uframes_t ++aiu_spdif_dma_pointer(struct snd_pcm_substream *substream) ++{ ++ struct snd_pcm_runtime *runtime = substream->runtime; ++ struct aiu_spdif_dma *priv = aiu_spdif_dma_priv(substream); ++ unsigned int addr; ++ int ret; ++ ++ ret = regmap_read(priv->core->aiu, AIU_MEM_IEC958_RD_PTR, ++ &addr); ++ if (ret) ++ return 0; ++ ++ return bytes_to_frames(runtime, addr - (unsigned int)runtime->dma_addr); ++} ++ ++static void __dma_enable(struct aiu_spdif_dma *priv, bool enable) ++{ ++ unsigned int en_mask = (AIU_MEM_IEC958_CONTROL_FILL_EN | ++ AIU_MEM_IEC958_CONTROL_EMPTY_EN); ++ ++ regmap_update_bits(priv->core->aiu, AIU_MEM_IEC958_CONTROL, en_mask, ++ enable ? en_mask : 0); ++} ++ ++static void __dcu_fifo_enable(struct aiu_spdif_dma *priv, bool enable) ++{ ++ regmap_update_bits(priv->core->aiu, AIU_958_DCU_FF_CTRL, ++ AIU_958_DCU_FF_CTRL_EN, ++ enable ? AIU_958_DCU_FF_CTRL_EN : 0); ++} ++ ++static int aiu_spdif_dma_trigger(struct snd_pcm_substream *substream, int cmd) ++{ ++ struct aiu_spdif_dma *priv = aiu_spdif_dma_priv(substream); ++ ++ switch (cmd) { ++ case SNDRV_PCM_TRIGGER_START: ++ case SNDRV_PCM_TRIGGER_RESUME: ++ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: ++ __dcu_fifo_enable(priv, true); ++ __dma_enable(priv, true); ++ break; ++ case SNDRV_PCM_TRIGGER_SUSPEND: ++ case SNDRV_PCM_TRIGGER_PAUSE_PUSH: ++ case SNDRV_PCM_TRIGGER_STOP: ++ __dma_enable(priv, false); ++ __dcu_fifo_enable(priv, false); ++ break; ++ default: ++ return -EINVAL; ++ } ++ ++ return 0; ++} ++ ++static void __dma_init_mem(struct aiu_spdif_dma *priv) ++{ ++ regmap_update_bits(priv->core->aiu, AIU_MEM_IEC958_CONTROL, ++ AIU_MEM_IEC958_CONTROL_INIT, ++ AIU_MEM_IEC958_CONTROL_INIT); ++ regmap_update_bits(priv->core->aiu, AIU_MEM_IEC958_BUF_CNTL, ++ AIU_MEM_IEC958_BUF_CNTL_INIT, ++ AIU_MEM_IEC958_BUF_CNTL_INIT); ++ ++ regmap_update_bits(priv->core->aiu, AIU_MEM_IEC958_CONTROL, ++ AIU_MEM_IEC958_CONTROL_INIT, ++ 0); ++ regmap_update_bits(priv->core->aiu, AIU_MEM_IEC958_BUF_CNTL, ++ AIU_MEM_IEC958_BUF_CNTL_INIT, ++ 0); ++} ++ ++static int aiu_spdif_dma_prepare(struct snd_pcm_substream *substream) ++{ ++ struct aiu_spdif_dma *priv = aiu_spdif_dma_priv(substream); ++ ++ __dma_init_mem(priv); ++ ++ return 0; ++} ++ ++static int __setup_memory_layout(struct aiu_spdif_dma *priv, ++ unsigned int width) ++{ ++ u32 mem_ctl = AIU_MEM_IEC958_CONTROL_RD_DDR; ++ ++ if (width == 16) ++ mem_ctl |= AIU_MEM_IEC958_CONTROL_MODE_16BIT; ++ ++ regmap_update_bits(priv->core->aiu, AIU_MEM_IEC958_CONTROL, ++ AIU_MEM_IEC958_CONTROL_ENDIAN_MASK | ++ AIU_MEM_IEC958_CONTROL_MODE_16BIT | ++ AIU_MEM_IEC958_CONTROL_RD_DDR, ++ mem_ctl); ++ ++ return 0; ++} ++ ++static int aiu_spdif_dma_hw_params(struct snd_pcm_substream *substream, ++ struct snd_pcm_hw_params *params) ++{ ++ struct snd_pcm_runtime *runtime = substream->runtime; ++ struct aiu_spdif_dma *priv = aiu_spdif_dma_priv(substream); ++ int ret; ++ dma_addr_t end_ptr; ++ ++ ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); ++ if (ret < 0) ++ return ret; ++ ++ ret = __setup_memory_layout(priv, params_physical_width(params)); ++ if (ret) ++ return ret; ++ ++ /* Initialize memory pointers */ ++ regmap_write(priv->core->aiu, ++ AIU_MEM_IEC958_START_PTR, runtime->dma_addr); ++ regmap_write(priv->core->aiu, ++ AIU_MEM_IEC958_RD_PTR, runtime->dma_addr); ++ ++ /* The end pointer is the address of the last valid block */ ++ end_ptr = runtime->dma_addr + runtime->dma_bytes - AIU_SPDIF_DMA_BURST; ++ regmap_write(priv->core->aiu, AIU_MEM_IEC958_END_PTR, end_ptr); ++ ++ /* Memory masks */ ++ regmap_write(priv->core->aiu, AIU_MEM_IEC958_MASKS, ++ AIU_MEM_IEC958_MASKS_CH_RD(0xff) | ++ AIU_MEM_IEC958_MASKS_CH_MEM(0xff)); ++ ++ /* Setup the number bytes read by the FIFO between each IRQ */ ++ regmap_write(priv->core->aiu, AIU_958_BPF, params_period_bytes(params)); ++ ++ /* ++ * AUTO_DISABLE and SYNC_HEAD are enabled by default but ++ * this should be disabled in PCM (uncompressed) mode ++ */ ++ regmap_update_bits(priv->core->aiu, AIU_958_DCU_FF_CTRL, ++ AIU_958_DCU_FF_CTRL_AUTO_DISABLE | ++ AIU_958_DCU_FF_CTRL_IRQ_MODE_MASK | ++ AIU_958_DCU_FF_CTRL_SYNC_HEAD_EN, ++ AIU_958_DCU_FF_CTRL_IRQ_FRAME_READ); ++ ++ return 0; ++} ++ ++static int aiu_spdif_dma_hw_free(struct snd_pcm_substream *substream) ++{ ++ return snd_pcm_lib_free_pages(substream); ++} ++ ++static irqreturn_t aiu_spdif_dma_irq(int irq, void *dev_id) ++{ ++ struct snd_pcm_substream *playback = dev_id; ++ ++ snd_pcm_period_elapsed(playback); ++ ++ return IRQ_HANDLED; ++} ++ ++static int aiu_spdif_dma_open(struct snd_pcm_substream *substream) ++{ ++ struct aiu_spdif_dma *priv = aiu_spdif_dma_priv(substream); ++ int ret; ++ ++ snd_soc_set_runtime_hwparams(substream, &aiu_spdif_dma_hw); ++ ++ /* ++ * Make sure the buffer and period size are multiple of the DMA burst ++ * size ++ */ ++ ret = snd_pcm_hw_constraint_step(substream->runtime, 0, ++ SNDRV_PCM_HW_PARAM_BUFFER_BYTES, ++ AIU_SPDIF_DMA_BURST); ++ if (ret) ++ return ret; ++ ++ ret = snd_pcm_hw_constraint_step(substream->runtime, 0, ++ SNDRV_PCM_HW_PARAM_PERIOD_BYTES, ++ AIU_SPDIF_DMA_BURST); ++ if (ret) ++ return ret; ++ ++ /* Request the SPDIF DDR irq */ ++ ret = request_irq(priv->irq, aiu_spdif_dma_irq, 0, ++ DRV_NAME, substream); ++ if (ret) ++ return ret; ++ ++ /* Power up the spdif fast domain - can't write the register w/o it */ ++ ret = clk_prepare_enable(priv->fast); ++ if (ret) ++ return ret; ++ ++ /* Make sure the dma is initially halted */ ++ __dma_enable(priv, false); ++ __dcu_fifo_enable(priv, false); ++ ++ return 0; ++} ++ ++static int aiu_spdif_dma_close(struct snd_pcm_substream *substream) ++{ ++ struct aiu_spdif_dma *priv = aiu_spdif_dma_priv(substream); ++ ++ clk_disable_unprepare(priv->fast); ++ free_irq(priv->irq, substream); ++ ++ return 0; ++} ++ ++static const struct snd_pcm_ops aiu_spdif_dma_ops = { ++ .open = aiu_spdif_dma_open, ++ .close = aiu_spdif_dma_close, ++ .ioctl = snd_pcm_lib_ioctl, ++ .hw_params = aiu_spdif_dma_hw_params, ++ .hw_free = aiu_spdif_dma_hw_free, ++ .prepare = aiu_spdif_dma_prepare, ++ .pointer = aiu_spdif_dma_pointer, ++ .trigger = aiu_spdif_dma_trigger, ++}; ++ ++static int aiu_spdif_dma_new(struct snd_soc_pcm_runtime *rtd) ++{ ++ struct snd_card *card = rtd->card->snd_card; ++ size_t size = aiu_spdif_dma_hw.buffer_bytes_max; ++ ++ return snd_pcm_lib_preallocate_pages_for_all(rtd->pcm, ++ SNDRV_DMA_TYPE_DEV, ++ card->dev, size, size); ++} ++ ++static const struct snd_soc_component_driver aiu_spdif_platform = { ++ .ops = &aiu_spdif_dma_ops, ++ .pcm_new = aiu_spdif_dma_new, ++ .name = DRV_NAME, ++}; ++ ++static int aiu_spdif_dma_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct aiu_spdif_dma *priv; ++ ++ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); ++ if (!priv) ++ return -ENOMEM; ++ ++ platform_set_drvdata(pdev, priv); ++ priv->core = dev_get_drvdata(dev->parent); ++ ++ priv->fast = devm_clk_get(dev, "fast"); ++ if (IS_ERR(priv->fast)) { ++ if (PTR_ERR(priv->fast) != -EPROBE_DEFER) ++ dev_err(dev, "Can't get spdif fast domain clock\n"); ++ return PTR_ERR(priv->fast); ++ } ++ ++ priv->irq = platform_get_irq(pdev, 0); ++ if (priv->irq <= 0) { ++ dev_err(dev, "Can't get spdif ddr irq\n"); ++ return priv->irq; ++ } ++ ++ return devm_snd_soc_register_component(dev, &aiu_spdif_platform, ++ NULL, 0); ++} ++ ++static const struct of_device_id aiu_spdif_dma_of_match[] = { ++ { .compatible = "amlogic,meson-aiu-spdif-dma", }, ++ { .compatible = "amlogic,meson-gxbb-aiu-spdif-dma", }, ++ { .compatible = "amlogic,meson-gxl-aiu-spdif-dma", }, ++ {} ++}; ++MODULE_DEVICE_TABLE(of, aiu_spdif_dma_of_match); ++ ++static struct platform_driver aiu_spdif_dma_pdrv = { ++ .probe = aiu_spdif_dma_probe, ++ .driver = { ++ .name = DRV_NAME, ++ .of_match_table = aiu_spdif_dma_of_match, ++ }, ++}; ++module_platform_driver(aiu_spdif_dma_pdrv); ++ ++MODULE_DESCRIPTION("Meson AIU spdif DMA ASoC Driver"); ++MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>"); ++MODULE_LICENSE("GPL"); |