--- /dev/null
- return snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
+ // 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 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;
+ };
+
+ /*
+ * 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_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;
+ 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;
+
+ active_ch = params_channels(params);
+ 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)
+ 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);
++ 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 = {
+ .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 <maruthis@xilinx.com>");
+ MODULE_LICENSE("GPL v2");
projects / linux / commitdiff