diff options
Diffstat (limited to '')
-rw-r--r-- | sound/soc/xilinx/xlnx_formatter_pcm.c | 725 |
1 files changed, 725 insertions, 0 deletions
diff --git a/sound/soc/xilinx/xlnx_formatter_pcm.c b/sound/soc/xilinx/xlnx_formatter_pcm.c new file mode 100644 index 0000000000..299cfb5e20 --- /dev/null +++ b/sound/soc/xilinx/xlnx_formatter_pcm.c @@ -0,0 +1,725 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Xilinx ASoC audio formatter support +// +// Copyright (C) 2018 Xilinx, Inc. +// +// Author: Maruthi Srinivas Bayyavarapu <maruthis@xilinx.com> + +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/sizes.h> + +#include <sound/asoundef.h> +#include <sound/soc.h> +#include <sound/pcm_params.h> + +#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 XLNX_AUD_ALIGN_BYTES 64 + +#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) +#define XLNX_PARAM_UNKNOWN 0 + +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; + int s2mm_irq; + int mm2s_irq; + struct snd_pcm_substream *play_stream; + struct snd_pcm_substream *capture_stream; + struct clk *axi_clk; + unsigned int sysclk; +}; + +/* + * 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, +}; + +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; + + 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_set_sysclk(struct snd_soc_component *component, + int clk_id, int source, unsigned int freq, int dir) +{ + struct xlnx_pcm_drv_data *adata = dev_get_drvdata(component->dev); + + adata->sysclk = freq; + return 0; +} + +static int xlnx_formatter_pcm_open(struct snd_soc_component *component, + 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 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 bytes as divisible by 64 */ + err = snd_pcm_hw_constraint_step(runtime, 0, + SNDRV_PCM_HW_PARAM_PERIOD_BYTES, + XLNX_AUD_ALIGN_BYTES); + if (err) { + dev_err(component->dev, + "Unable to set constraint on period bytes\n"); + return err; + } + + /* Resize the buffer bytes as divisible by 64 */ + err = snd_pcm_hw_constraint_step(runtime, 0, + SNDRV_PCM_HW_PARAM_BUFFER_BYTES, + XLNX_AUD_ALIGN_BYTES); + if (err) { + dev_err(component->dev, + "Unable to set constraint on buffer bytes\n"); + return err; + } + + /* Set periods as integer multiple */ + err = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (err < 0) { + dev_err(component->dev, + "Unable to set constraint on periods to be integer\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_soc_component *component, + struct snd_pcm_substream *substream) +{ + int ret; + struct xlnx_pcm_stream_param *stream_data = + substream->runtime->private_data; + + 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_soc_component *component, + 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_soc_component *component, + 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; + u64 size; + struct snd_pcm_runtime *runtime = substream->runtime; + struct xlnx_pcm_stream_param *stream_data = runtime->private_data; + struct xlnx_pcm_drv_data *adata = dev_get_drvdata(component->dev); + + active_ch = params_channels(params); + if (active_ch > stream_data->ch_limit) + return -EINVAL; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && + adata->sysclk) { + unsigned int mclk_fs = adata->sysclk / params_rate(params); + + if (adata->sysclk % params_rate(params) != 0) { + dev_warn(component->dev, "sysclk %u not divisible by rate %u\n", + adata->sysclk, params_rate(params)); + return -EINVAL; + } + + writel(mclk_fs, stream_data->mmio + XLNX_AUD_FS_MULTIPLIER); + } + + 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); + + stream_data->buffer_size = size; + + low = lower_32_bits(runtime->dma_addr); + high = upper_32_bits(runtime->dma_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_trigger(struct snd_soc_component *component, + 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_component *component, + struct snd_soc_pcm_runtime *rtd) +{ + snd_pcm_set_managed_buffer_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_soc_component_driver xlnx_asoc_component = { + .name = DRV_NAME, + .set_sysclk = xlnx_formatter_set_sysclk, + .open = xlnx_formatter_pcm_open, + .close = xlnx_formatter_pcm_close, + .hw_params = xlnx_formatter_pcm_hw_params, + .trigger = xlnx_formatter_pcm_trigger, + .pointer = xlnx_formatter_pcm_pointer, + .pcm_construct = 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 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; + } + + aud_drv_data->mmio = devm_platform_ioremap_resource(pdev, 0); + 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) { + 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) { + 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 void 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); +} + +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_new = 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 <maruthis@xilinx.com>"); +MODULE_LICENSE("GPL v2"); |