From 6f6c3c36f0917be24587eeba818ab4fdfcb5465a Mon Sep 17 00:00:00 2001 From: Maruthi Srinivas Bayyavarapu Date: Fri, 21 Dec 2018 14:27:28 +0530 Subject: ASoC: xlnx: add pcm formatter platform driver The audio formatter PL IP supports DMA of two streams - mm2s and s2mm for playback and capture respectively. Apart from DMA, IP also does conversions like PCM to AES and viceversa. This patch adds DMA component driver for the IP. Signed-off-by: Maruthi Srinivas Bayyavarapu Signed-off-by: Mark Brown --- sound/soc/xilinx/xlnx_formatter_pcm.c | 565 ++++++++++++++++++++++++++++++++++ 1 file changed, 565 insertions(+) create mode 100644 sound/soc/xilinx/xlnx_formatter_pcm.c (limited to 'sound/soc/xilinx/xlnx_formatter_pcm.c') diff --git a/sound/soc/xilinx/xlnx_formatter_pcm.c b/sound/soc/xilinx/xlnx_formatter_pcm.c new file mode 100644 index 000000000000..f7235f7664d7 --- /dev/null +++ b/sound/soc/xilinx/xlnx_formatter_pcm.c @@ -0,0 +1,565 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Xilinx ASoC audio formatter support +// +// Copyright (C) 2018 Xilinx, Inc. +// +// Author: Maruthi Srinivas Bayyavarapu + +#include +#include +#include +#include +#include +#include + +#include +#include + +#define DRV_NAME "xlnx_formatter_pcm" + +#define XLNX_S2MM_OFFSET 0 +#define XLNX_MM2S_OFFSET 0x100 + +#define XLNX_AUD_CORE_CONFIG 0x4 +#define XLNX_AUD_CTRL 0x10 +#define XLNX_AUD_STS 0x14 + +#define AUD_CTRL_RESET_MASK BIT(1) +#define AUD_CFG_MM2S_MASK BIT(15) +#define AUD_CFG_S2MM_MASK BIT(31) + +#define XLNX_AUD_FS_MULTIPLIER 0x18 +#define XLNX_AUD_PERIOD_CONFIG 0x1C +#define XLNX_AUD_BUFF_ADDR_LSB 0x20 +#define XLNX_AUD_BUFF_ADDR_MSB 0x24 +#define XLNX_AUD_XFER_COUNT 0x28 +#define XLNX_AUD_CH_STS_START 0x2C +#define XLNX_BYTES_PER_CH 0x44 + +#define AUD_STS_IOC_IRQ_MASK BIT(31) +#define AUD_STS_CH_STS_MASK BIT(29) +#define AUD_CTRL_IOC_IRQ_MASK BIT(13) +#define AUD_CTRL_TOUT_IRQ_MASK BIT(14) +#define AUD_CTRL_DMA_EN_MASK BIT(0) + +#define CFG_MM2S_CH_MASK GENMASK(11, 8) +#define CFG_MM2S_CH_SHIFT 8 +#define CFG_MM2S_XFER_MASK GENMASK(14, 13) +#define CFG_MM2S_XFER_SHIFT 13 +#define CFG_MM2S_PKG_MASK BIT(12) + +#define CFG_S2MM_CH_MASK GENMASK(27, 24) +#define CFG_S2MM_CH_SHIFT 24 +#define CFG_S2MM_XFER_MASK GENMASK(30, 29) +#define CFG_S2MM_XFER_SHIFT 29 +#define CFG_S2MM_PKG_MASK BIT(28) + +#define AUD_CTRL_DATA_WIDTH_SHIFT 16 +#define AUD_CTRL_ACTIVE_CH_SHIFT 19 +#define PERIOD_CFG_PERIODS_SHIFT 16 + +#define PERIODS_MIN 2 +#define PERIODS_MAX 6 +#define PERIOD_BYTES_MIN 192 +#define PERIOD_BYTES_MAX (50 * 1024) + +enum bit_depth { + BIT_DEPTH_8, + BIT_DEPTH_16, + BIT_DEPTH_20, + BIT_DEPTH_24, + BIT_DEPTH_32, +}; + +struct xlnx_pcm_drv_data { + void __iomem *mmio; + bool s2mm_presence; + bool mm2s_presence; + unsigned int s2mm_irq; + unsigned int mm2s_irq; + struct snd_pcm_substream *play_stream; + struct snd_pcm_substream *capture_stream; + struct clk *axi_clk; +}; + +/* + * struct xlnx_pcm_stream_param - stream configuration + * @mmio: base address offset + * @interleaved: audio channels arrangement in buffer + * @xfer_mode: data formatting mode during transfer + * @ch_limit: Maximum channels supported + * @buffer_size: stream ring buffer size + */ +struct xlnx_pcm_stream_param { + void __iomem *mmio; + bool interleaved; + u32 xfer_mode; + u32 ch_limit; + u64 buffer_size; +}; + +static const struct snd_pcm_hardware xlnx_pcm_hardware = { + .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_BATCH | SNDRV_PCM_INFO_PAUSE | + SNDRV_PCM_INFO_RESUME, + .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_S24_LE, + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_192000, + .rate_min = 8000, + .rate_max = 192000, + .buffer_bytes_max = PERIODS_MAX * PERIOD_BYTES_MAX, + .period_bytes_min = PERIOD_BYTES_MIN, + .period_bytes_max = PERIOD_BYTES_MAX, + .periods_min = PERIODS_MIN, + .periods_max = PERIODS_MAX, +}; + +static int xlnx_formatter_pcm_reset(void __iomem *mmio_base) +{ + u32 val, retries = 0; + + val = readl(mmio_base + XLNX_AUD_CTRL); + val |= AUD_CTRL_RESET_MASK; + writel(val, mmio_base + XLNX_AUD_CTRL); + + val = readl(mmio_base + XLNX_AUD_CTRL); + /* Poll for maximum timeout of approximately 100ms (1 * 100)*/ + while ((val & AUD_CTRL_RESET_MASK) && (retries < 100)) { + mdelay(1); + retries++; + val = readl(mmio_base + XLNX_AUD_CTRL); + } + if (val & AUD_CTRL_RESET_MASK) + return -ENODEV; + + return 0; +} + +static void xlnx_formatter_disable_irqs(void __iomem *mmio_base, int stream) +{ + u32 val; + + val = readl(mmio_base + XLNX_AUD_CTRL); + val &= ~AUD_CTRL_IOC_IRQ_MASK; + if (stream == SNDRV_PCM_STREAM_CAPTURE) + val &= ~AUD_CTRL_TOUT_IRQ_MASK; + + writel(val, mmio_base + XLNX_AUD_CTRL); +} + +static irqreturn_t xlnx_mm2s_irq_handler(int irq, void *arg) +{ + u32 val; + void __iomem *reg; + struct device *dev = arg; + struct xlnx_pcm_drv_data *adata = dev_get_drvdata(dev); + + reg = adata->mmio + XLNX_MM2S_OFFSET + XLNX_AUD_STS; + val = readl(reg); + if (val & AUD_STS_IOC_IRQ_MASK) { + writel(val & AUD_STS_IOC_IRQ_MASK, reg); + if (adata->play_stream) + snd_pcm_period_elapsed(adata->play_stream); + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + +static irqreturn_t xlnx_s2mm_irq_handler(int irq, void *arg) +{ + u32 val; + void __iomem *reg; + struct device *dev = arg; + struct xlnx_pcm_drv_data *adata = dev_get_drvdata(dev); + + reg = adata->mmio + XLNX_S2MM_OFFSET + XLNX_AUD_STS; + val = readl(reg); + if (val & AUD_STS_IOC_IRQ_MASK) { + writel(val & AUD_STS_IOC_IRQ_MASK, reg); + if (adata->capture_stream) + snd_pcm_period_elapsed(adata->capture_stream); + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + +static int xlnx_formatter_pcm_open(struct snd_pcm_substream *substream) +{ + int err; + u32 val, data_format_mode; + u32 ch_count_mask, ch_count_shift, data_xfer_mode, data_xfer_shift; + struct xlnx_pcm_stream_param *stream_data; + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_soc_pcm_runtime *prtd = substream->private_data; + struct snd_soc_component *component = snd_soc_rtdcom_lookup(prtd, + DRV_NAME); + struct xlnx_pcm_drv_data *adata = dev_get_drvdata(component->dev); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && + !adata->mm2s_presence) + return -ENODEV; + else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && + !adata->s2mm_presence) + return -ENODEV; + + stream_data = kzalloc(sizeof(*stream_data), GFP_KERNEL); + if (!stream_data) + return -ENOMEM; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + ch_count_mask = CFG_MM2S_CH_MASK; + ch_count_shift = CFG_MM2S_CH_SHIFT; + data_xfer_mode = CFG_MM2S_XFER_MASK; + data_xfer_shift = CFG_MM2S_XFER_SHIFT; + data_format_mode = CFG_MM2S_PKG_MASK; + stream_data->mmio = adata->mmio + XLNX_MM2S_OFFSET; + adata->play_stream = substream; + + } else { + ch_count_mask = CFG_S2MM_CH_MASK; + ch_count_shift = CFG_S2MM_CH_SHIFT; + data_xfer_mode = CFG_S2MM_XFER_MASK; + data_xfer_shift = CFG_S2MM_XFER_SHIFT; + data_format_mode = CFG_S2MM_PKG_MASK; + stream_data->mmio = adata->mmio + XLNX_S2MM_OFFSET; + adata->capture_stream = substream; + } + + val = readl(adata->mmio + XLNX_AUD_CORE_CONFIG); + + if (!(val & data_format_mode)) + stream_data->interleaved = true; + + stream_data->xfer_mode = (val & data_xfer_mode) >> data_xfer_shift; + stream_data->ch_limit = (val & ch_count_mask) >> ch_count_shift; + dev_info(component->dev, + "stream %d : format = %d mode = %d ch_limit = %d\n", + substream->stream, stream_data->interleaved, + stream_data->xfer_mode, stream_data->ch_limit); + + snd_soc_set_runtime_hwparams(substream, &xlnx_pcm_hardware); + runtime->private_data = stream_data; + + /* Resize the period size divisible by 64 */ + err = snd_pcm_hw_constraint_step(runtime, 0, + SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64); + if (err) { + dev_err(component->dev, + "unable to set constraint on period bytes\n"); + return err; + } + + /* enable DMA IOC irq */ + val = readl(stream_data->mmio + XLNX_AUD_CTRL); + val |= AUD_CTRL_IOC_IRQ_MASK; + writel(val, stream_data->mmio + XLNX_AUD_CTRL); + + return 0; +} + +static int xlnx_formatter_pcm_close(struct snd_pcm_substream *substream) +{ + int ret; + struct xlnx_pcm_stream_param *stream_data = + substream->runtime->private_data; + struct snd_soc_pcm_runtime *prtd = substream->private_data; + struct snd_soc_component *component = snd_soc_rtdcom_lookup(prtd, + DRV_NAME); + + ret = xlnx_formatter_pcm_reset(stream_data->mmio); + if (ret) { + dev_err(component->dev, "audio formatter reset failed\n"); + goto err_reset; + } + xlnx_formatter_disable_irqs(stream_data->mmio, substream->stream); + +err_reset: + kfree(stream_data); + return 0; +} + +static snd_pcm_uframes_t +xlnx_formatter_pcm_pointer(struct snd_pcm_substream *substream) +{ + u32 pos; + struct snd_pcm_runtime *runtime = substream->runtime; + struct xlnx_pcm_stream_param *stream_data = runtime->private_data; + + pos = readl(stream_data->mmio + XLNX_AUD_XFER_COUNT); + + if (pos >= stream_data->buffer_size) + pos = 0; + + return bytes_to_frames(runtime, pos); +} + +static int xlnx_formatter_pcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + u32 low, high, active_ch, val, bytes_per_ch, bits_per_sample; + int status; + u64 size; + struct snd_pcm_runtime *runtime = substream->runtime; + struct xlnx_pcm_stream_param *stream_data = runtime->private_data; + + active_ch = params_channels(params); + if (active_ch > stream_data->ch_limit) + return -EINVAL; + + size = params_buffer_bytes(params); + status = snd_pcm_lib_malloc_pages(substream, size); + if (status < 0) + return status; + + stream_data->buffer_size = size; + + low = lower_32_bits(substream->dma_buffer.addr); + high = upper_32_bits(substream->dma_buffer.addr); + writel(low, stream_data->mmio + XLNX_AUD_BUFF_ADDR_LSB); + writel(high, stream_data->mmio + XLNX_AUD_BUFF_ADDR_MSB); + + val = readl(stream_data->mmio + XLNX_AUD_CTRL); + bits_per_sample = params_width(params); + switch (bits_per_sample) { + case 8: + val |= (BIT_DEPTH_8 << AUD_CTRL_DATA_WIDTH_SHIFT); + break; + case 16: + val |= (BIT_DEPTH_16 << AUD_CTRL_DATA_WIDTH_SHIFT); + break; + case 20: + val |= (BIT_DEPTH_20 << AUD_CTRL_DATA_WIDTH_SHIFT); + break; + case 24: + val |= (BIT_DEPTH_24 << AUD_CTRL_DATA_WIDTH_SHIFT); + break; + case 32: + val |= (BIT_DEPTH_32 << AUD_CTRL_DATA_WIDTH_SHIFT); + break; + default: + return -EINVAL; + } + + val |= active_ch << AUD_CTRL_ACTIVE_CH_SHIFT; + writel(val, stream_data->mmio + XLNX_AUD_CTRL); + + val = (params_periods(params) << PERIOD_CFG_PERIODS_SHIFT) + | params_period_bytes(params); + writel(val, stream_data->mmio + XLNX_AUD_PERIOD_CONFIG); + bytes_per_ch = DIV_ROUND_UP(params_period_bytes(params), active_ch); + writel(bytes_per_ch, stream_data->mmio + XLNX_BYTES_PER_CH); + + return 0; +} + +static int xlnx_formatter_pcm_hw_free(struct snd_pcm_substream *substream) +{ + return snd_pcm_lib_free_pages(substream); +} + +static int xlnx_formatter_pcm_trigger(struct snd_pcm_substream *substream, + int cmd) +{ + u32 val; + struct xlnx_pcm_stream_param *stream_data = + substream->runtime->private_data; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + case SNDRV_PCM_TRIGGER_RESUME: + val = readl(stream_data->mmio + XLNX_AUD_CTRL); + val |= AUD_CTRL_DMA_EN_MASK; + writel(val, stream_data->mmio + XLNX_AUD_CTRL); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + case SNDRV_PCM_TRIGGER_SUSPEND: + val = readl(stream_data->mmio + XLNX_AUD_CTRL); + val &= ~AUD_CTRL_DMA_EN_MASK; + writel(val, stream_data->mmio + XLNX_AUD_CTRL); + break; + } + + return 0; +} + +static int xlnx_formatter_pcm_new(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, + DRV_NAME); + return snd_pcm_lib_preallocate_pages_for_all(rtd->pcm, + SNDRV_DMA_TYPE_DEV, component->dev, + xlnx_pcm_hardware.buffer_bytes_max, + xlnx_pcm_hardware.buffer_bytes_max); +} + +static const struct snd_pcm_ops xlnx_formatter_pcm_ops = { + .open = xlnx_formatter_pcm_open, + .close = xlnx_formatter_pcm_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = xlnx_formatter_pcm_hw_params, + .hw_free = xlnx_formatter_pcm_hw_free, + .trigger = xlnx_formatter_pcm_trigger, + .pointer = xlnx_formatter_pcm_pointer, +}; + +static const struct snd_soc_component_driver xlnx_asoc_component = { + .name = DRV_NAME, + .ops = &xlnx_formatter_pcm_ops, + .pcm_new = xlnx_formatter_pcm_new, +}; + +static int xlnx_formatter_pcm_probe(struct platform_device *pdev) +{ + int ret; + u32 val; + struct xlnx_pcm_drv_data *aud_drv_data; + struct resource *res; + struct device *dev = &pdev->dev; + + aud_drv_data = devm_kzalloc(dev, sizeof(*aud_drv_data), GFP_KERNEL); + if (!aud_drv_data) + return -ENOMEM; + + aud_drv_data->axi_clk = devm_clk_get(dev, "s_axi_lite_aclk"); + if (IS_ERR(aud_drv_data->axi_clk)) { + ret = PTR_ERR(aud_drv_data->axi_clk); + dev_err(dev, "failed to get s_axi_lite_aclk(%d)\n", ret); + return ret; + } + ret = clk_prepare_enable(aud_drv_data->axi_clk); + if (ret) { + dev_err(dev, + "failed to enable s_axi_lite_aclk(%d)\n", ret); + return ret; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "audio formatter node:addr to resource failed\n"); + ret = -ENXIO; + goto clk_err; + } + aud_drv_data->mmio = devm_ioremap_resource(dev, res); + if (IS_ERR(aud_drv_data->mmio)) { + dev_err(dev, "audio formatter ioremap failed\n"); + ret = PTR_ERR(aud_drv_data->mmio); + goto clk_err; + } + + val = readl(aud_drv_data->mmio + XLNX_AUD_CORE_CONFIG); + if (val & AUD_CFG_MM2S_MASK) { + aud_drv_data->mm2s_presence = true; + ret = xlnx_formatter_pcm_reset(aud_drv_data->mmio + + XLNX_MM2S_OFFSET); + if (ret) { + dev_err(dev, "audio formatter reset failed\n"); + goto clk_err; + } + xlnx_formatter_disable_irqs(aud_drv_data->mmio + + XLNX_MM2S_OFFSET, + SNDRV_PCM_STREAM_PLAYBACK); + + aud_drv_data->mm2s_irq = platform_get_irq_byname(pdev, + "irq_mm2s"); + if (aud_drv_data->mm2s_irq < 0) { + dev_err(dev, "xlnx audio mm2s irq resource failed\n"); + ret = aud_drv_data->mm2s_irq; + goto clk_err; + } + ret = devm_request_irq(dev, aud_drv_data->mm2s_irq, + xlnx_mm2s_irq_handler, 0, + "xlnx_formatter_pcm_mm2s_irq", dev); + if (ret) { + dev_err(dev, "xlnx audio mm2s irq request failed\n"); + goto clk_err; + } + } + if (val & AUD_CFG_S2MM_MASK) { + aud_drv_data->s2mm_presence = true; + ret = xlnx_formatter_pcm_reset(aud_drv_data->mmio + + XLNX_S2MM_OFFSET); + if (ret) { + dev_err(dev, "audio formatter reset failed\n"); + goto clk_err; + } + xlnx_formatter_disable_irqs(aud_drv_data->mmio + + XLNX_S2MM_OFFSET, + SNDRV_PCM_STREAM_CAPTURE); + + aud_drv_data->s2mm_irq = platform_get_irq_byname(pdev, + "irq_s2mm"); + if (aud_drv_data->s2mm_irq < 0) { + dev_err(dev, "xlnx audio s2mm irq resource failed\n"); + ret = aud_drv_data->s2mm_irq; + goto clk_err; + } + ret = devm_request_irq(dev, aud_drv_data->s2mm_irq, + xlnx_s2mm_irq_handler, 0, + "xlnx_formatter_pcm_s2mm_irq", + dev); + if (ret) { + dev_err(dev, "xlnx audio s2mm irq request failed\n"); + goto clk_err; + } + } + + dev_set_drvdata(dev, aud_drv_data); + + ret = devm_snd_soc_register_component(dev, &xlnx_asoc_component, + NULL, 0); + if (ret) { + dev_err(dev, "pcm platform device register failed\n"); + goto clk_err; + } + + return 0; + +clk_err: + clk_disable_unprepare(aud_drv_data->axi_clk); + return ret; +} + +static int xlnx_formatter_pcm_remove(struct platform_device *pdev) +{ + int ret = 0; + struct xlnx_pcm_drv_data *adata = dev_get_drvdata(&pdev->dev); + + if (adata->s2mm_presence) + ret = xlnx_formatter_pcm_reset(adata->mmio + XLNX_S2MM_OFFSET); + + /* Try MM2S reset, even if S2MM reset fails */ + if (adata->mm2s_presence) + ret = xlnx_formatter_pcm_reset(adata->mmio + XLNX_MM2S_OFFSET); + + if (ret) + dev_err(&pdev->dev, "audio formatter reset failed\n"); + + clk_disable_unprepare(adata->axi_clk); + return ret; +} + +static const struct of_device_id xlnx_formatter_pcm_of_match[] = { + { .compatible = "xlnx,audio-formatter-1.0"}, + {}, +}; +MODULE_DEVICE_TABLE(of, xlnx_formatter_pcm_of_match); + +static struct platform_driver xlnx_formatter_pcm_driver = { + .probe = xlnx_formatter_pcm_probe, + .remove = xlnx_formatter_pcm_remove, + .driver = { + .name = DRV_NAME, + .of_match_table = xlnx_formatter_pcm_of_match, + }, +}; + +module_platform_driver(xlnx_formatter_pcm_driver); +MODULE_AUTHOR("Maruthi Srinivas Bayyavarapu "); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3 From 1d38b4e903d577f05393eb0ac6727f40d90dd6c6 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Wed, 26 Dec 2018 15:11:06 -0600 Subject: ASoC: xlnx: fix error handling in xlnx_formatter_pcm_probe Currently, if platform_get_irq_byname() fails, the returned error turns into a huge value, once it is being store into a variable of type unsigned int, hence never actually reporting any error and causing unexpected behavior when using the values stored in aud_drv_data->s2mm_irq and aud_drv_data->mm2s_irq. Fix this by changing the type of variables s2mm_irq and mm2s_irq in structure xlnx_pcm_drv_data from unsigned int to int. Addresses-Coverity-ID: 1476096 ("Unsigned compared against 0") Fixes: 796175a94a7f ("ASoC: xlnx: add pcm formatter platform driver") Signed-off-by: Gustavo A. R. Silva Signed-off-by: Mark Brown --- sound/soc/xilinx/xlnx_formatter_pcm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'sound/soc/xilinx/xlnx_formatter_pcm.c') diff --git a/sound/soc/xilinx/xlnx_formatter_pcm.c b/sound/soc/xilinx/xlnx_formatter_pcm.c index f7235f7664d7..d2194da928e7 100644 --- a/sound/soc/xilinx/xlnx_formatter_pcm.c +++ b/sound/soc/xilinx/xlnx_formatter_pcm.c @@ -76,8 +76,8 @@ struct xlnx_pcm_drv_data { void __iomem *mmio; bool s2mm_presence; bool mm2s_presence; - unsigned int s2mm_irq; - unsigned int mm2s_irq; + int s2mm_irq; + int mm2s_irq; struct snd_pcm_substream *play_stream; struct snd_pcm_substream *capture_stream; struct clk *axi_clk; -- cgit v1.2.3 From c284d4e31a0b66e6fe3734b36080afd237ff9fb0 Mon Sep 17 00:00:00 2001 From: Maruthi Srinivas Bayyavarapu Date: Thu, 10 Jan 2019 18:44:43 +0530 Subject: ASoC: xlnx: parse AES audio parameters AES channel status carries various audio parameters. If channel status is detected, current patch extracts sample rate and bit depth parameters of the incoming stream during capture. Signed-off-by: Maruthi Srinivas Bayyavarapu Signed-off-by: Mark Brown --- sound/soc/xilinx/xlnx_formatter_pcm.c | 143 ++++++++++++++++++++++++++++++++++ 1 file changed, 143 insertions(+) (limited to 'sound/soc/xilinx/xlnx_formatter_pcm.c') diff --git a/sound/soc/xilinx/xlnx_formatter_pcm.c b/sound/soc/xilinx/xlnx_formatter_pcm.c index d2194da928e7..97177d35652e 100644 --- a/sound/soc/xilinx/xlnx_formatter_pcm.c +++ b/sound/soc/xilinx/xlnx_formatter_pcm.c @@ -13,6 +13,7 @@ #include #include +#include #include #include @@ -63,6 +64,7 @@ #define PERIODS_MAX 6 #define PERIOD_BYTES_MIN 192 #define PERIOD_BYTES_MAX (50 * 1024) +#define XLNX_PARAM_UNKNOWN 0 enum bit_depth { BIT_DEPTH_8, @@ -117,6 +119,129 @@ static const struct snd_pcm_hardware xlnx_pcm_hardware = { .periods_max = PERIODS_MAX, }; +enum { + AES_TO_AES, + AES_TO_PCM, + PCM_TO_PCM, + PCM_TO_AES +}; + +static void xlnx_parse_aes_params(u32 chsts_reg1_val, u32 chsts_reg2_val, + struct device *dev) +{ + u32 padded, srate, bit_depth, status[2]; + + if (chsts_reg1_val & IEC958_AES0_PROFESSIONAL) { + status[0] = chsts_reg1_val & 0xff; + status[1] = (chsts_reg1_val >> 16) & 0xff; + + switch (status[0] & IEC958_AES0_PRO_FS) { + case IEC958_AES0_PRO_FS_44100: + srate = 44100; + break; + case IEC958_AES0_PRO_FS_48000: + srate = 48000; + break; + case IEC958_AES0_PRO_FS_32000: + srate = 32000; + break; + case IEC958_AES0_PRO_FS_NOTID: + default: + srate = XLNX_PARAM_UNKNOWN; + break; + } + + switch (status[1] & IEC958_AES2_PRO_SBITS) { + case IEC958_AES2_PRO_WORDLEN_NOTID: + case IEC958_AES2_PRO_SBITS_20: + padded = 0; + break; + case IEC958_AES2_PRO_SBITS_24: + padded = 4; + break; + default: + bit_depth = XLNX_PARAM_UNKNOWN; + goto log_params; + } + + switch (status[1] & IEC958_AES2_PRO_WORDLEN) { + case IEC958_AES2_PRO_WORDLEN_20_16: + bit_depth = 16 + padded; + break; + case IEC958_AES2_PRO_WORDLEN_22_18: + bit_depth = 18 + padded; + break; + case IEC958_AES2_PRO_WORDLEN_23_19: + bit_depth = 19 + padded; + break; + case IEC958_AES2_PRO_WORDLEN_24_20: + bit_depth = 20 + padded; + break; + case IEC958_AES2_PRO_WORDLEN_NOTID: + default: + bit_depth = XLNX_PARAM_UNKNOWN; + break; + } + + } else { + status[0] = (chsts_reg1_val >> 24) & 0xff; + status[1] = chsts_reg2_val & 0xff; + + switch (status[0] & IEC958_AES3_CON_FS) { + case IEC958_AES3_CON_FS_44100: + srate = 44100; + break; + case IEC958_AES3_CON_FS_48000: + srate = 48000; + break; + case IEC958_AES3_CON_FS_32000: + srate = 32000; + break; + default: + srate = XLNX_PARAM_UNKNOWN; + break; + } + + if (status[1] & IEC958_AES4_CON_MAX_WORDLEN_24) + padded = 4; + else + padded = 0; + + switch (status[1] & IEC958_AES4_CON_WORDLEN) { + case IEC958_AES4_CON_WORDLEN_20_16: + bit_depth = 16 + padded; + break; + case IEC958_AES4_CON_WORDLEN_22_18: + bit_depth = 18 + padded; + break; + case IEC958_AES4_CON_WORDLEN_23_19: + bit_depth = 19 + padded; + break; + case IEC958_AES4_CON_WORDLEN_24_20: + bit_depth = 20 + padded; + break; + case IEC958_AES4_CON_WORDLEN_21_17: + bit_depth = 17 + padded; + break; + case IEC958_AES4_CON_WORDLEN_NOTID: + default: + bit_depth = XLNX_PARAM_UNKNOWN; + break; + } + } + +log_params: + if (srate != XLNX_PARAM_UNKNOWN) + dev_info(dev, "sample rate = %d\n", srate); + else + dev_info(dev, "sample rate = unknown\n"); + + if (bit_depth != XLNX_PARAM_UNKNOWN) + dev_info(dev, "bit_depth = %d\n", bit_depth); + else + dev_info(dev, "bit_depth = unknown\n"); +} + static int xlnx_formatter_pcm_reset(void __iomem *mmio_base) { u32 val, retries = 0; @@ -302,8 +427,12 @@ static int xlnx_formatter_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { u32 low, high, active_ch, val, bytes_per_ch, bits_per_sample; + u32 aes_reg1_val, aes_reg2_val; int status; u64 size; + struct snd_soc_pcm_runtime *prtd = substream->private_data; + struct snd_soc_component *component = snd_soc_rtdcom_lookup(prtd, + DRV_NAME); struct snd_pcm_runtime *runtime = substream->runtime; struct xlnx_pcm_stream_param *stream_data = runtime->private_data; @@ -311,6 +440,20 @@ static int xlnx_formatter_pcm_hw_params(struct snd_pcm_substream *substream, if (active_ch > stream_data->ch_limit) return -EINVAL; + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && + stream_data->xfer_mode == AES_TO_PCM) { + val = readl(stream_data->mmio + XLNX_AUD_STS); + if (val & AUD_STS_CH_STS_MASK) { + aes_reg1_val = readl(stream_data->mmio + + XLNX_AUD_CH_STS_START); + aes_reg2_val = readl(stream_data->mmio + + XLNX_AUD_CH_STS_START + 0x4); + + xlnx_parse_aes_params(aes_reg1_val, aes_reg2_val, + component->dev); + } + } + size = params_buffer_bytes(params); status = snd_pcm_lib_malloc_pages(substream, size); if (status < 0) -- cgit v1.2.3 From 95d14640d9843f277214893541aef3acb7456a25 Mon Sep 17 00:00:00 2001 From: Stephen Rothwell Date: Fri, 8 Feb 2019 13:18:23 +1100 Subject: ASoC: xlnx: fix up for snd_pcm_lib_preallocate_pages_for_all() API change Signed-off-by: Stephen Rothwell Signed-off-by: Takashi Iwai --- sound/soc/xilinx/xlnx_formatter_pcm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'sound/soc/xilinx/xlnx_formatter_pcm.c') diff --git a/sound/soc/xilinx/xlnx_formatter_pcm.c b/sound/soc/xilinx/xlnx_formatter_pcm.c index 97177d35652e..dc8721f4f56b 100644 --- a/sound/soc/xilinx/xlnx_formatter_pcm.c +++ b/sound/soc/xilinx/xlnx_formatter_pcm.c @@ -536,10 +536,11 @@ static int xlnx_formatter_pcm_new(struct snd_soc_pcm_runtime *rtd) { struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME); - return snd_pcm_lib_preallocate_pages_for_all(rtd->pcm, + snd_pcm_lib_preallocate_pages_for_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, component->dev, xlnx_pcm_hardware.buffer_bytes_max, xlnx_pcm_hardware.buffer_bytes_max); + return 0; } static const struct snd_pcm_ops xlnx_formatter_pcm_ops = { -- cgit v1.2.3