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308 lines
7.5 KiB
308 lines
7.5 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// Copyright 2020 NXP |
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#include <linux/clk.h> |
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#include <linux/clk-provider.h> |
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#include <linux/delay.h> |
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#include <linux/dmaengine.h> |
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#include <linux/module.h> |
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#include <linux/of_device.h> |
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#include <linux/of_address.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/regmap.h> |
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#include <linux/slab.h> |
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#include <linux/time.h> |
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#include <linux/pm_qos.h> |
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#include <sound/core.h> |
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#include <sound/dmaengine_pcm.h> |
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#include <sound/pcm_params.h> |
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#include <linux/dma-mapping.h> |
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#include "fsl_aud2htx.h" |
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#include "imx-pcm.h" |
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static int fsl_aud2htx_trigger(struct snd_pcm_substream *substream, int cmd, |
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struct snd_soc_dai *dai) |
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{ |
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struct fsl_aud2htx *aud2htx = snd_soc_dai_get_drvdata(dai); |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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case SNDRV_PCM_TRIGGER_RESUME: |
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
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regmap_update_bits(aud2htx->regmap, AUD2HTX_CTRL, |
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AUD2HTX_CTRL_EN, AUD2HTX_CTRL_EN); |
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regmap_update_bits(aud2htx->regmap, AUD2HTX_CTRL_EXT, |
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AUD2HTX_CTRE_DE, AUD2HTX_CTRE_DE); |
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break; |
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case SNDRV_PCM_TRIGGER_SUSPEND: |
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case SNDRV_PCM_TRIGGER_STOP: |
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
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regmap_update_bits(aud2htx->regmap, AUD2HTX_CTRL_EXT, |
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AUD2HTX_CTRE_DE, 0); |
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regmap_update_bits(aud2htx->regmap, AUD2HTX_CTRL, |
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AUD2HTX_CTRL_EN, 0); |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static const struct snd_soc_dai_ops fsl_aud2htx_dai_ops = { |
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.trigger = fsl_aud2htx_trigger, |
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}; |
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static int fsl_aud2htx_dai_probe(struct snd_soc_dai *cpu_dai) |
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{ |
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struct fsl_aud2htx *aud2htx = dev_get_drvdata(cpu_dai->dev); |
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/* DMA request when number of entries < WTMK_LOW */ |
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regmap_update_bits(aud2htx->regmap, AUD2HTX_CTRL_EXT, |
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AUD2HTX_CTRE_DT_MASK, 0); |
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/* Disable interrupts*/ |
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regmap_update_bits(aud2htx->regmap, AUD2HTX_IRQ_MASK, |
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AUD2HTX_WM_HIGH_IRQ_MASK | |
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AUD2HTX_WM_LOW_IRQ_MASK | |
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AUD2HTX_OVF_MASK, |
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AUD2HTX_WM_HIGH_IRQ_MASK | |
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AUD2HTX_WM_LOW_IRQ_MASK | |
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AUD2HTX_OVF_MASK); |
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/* Configure watermark */ |
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regmap_update_bits(aud2htx->regmap, AUD2HTX_CTRL_EXT, |
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AUD2HTX_CTRE_WL_MASK, |
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AUD2HTX_WTMK_LOW << AUD2HTX_CTRE_WL_SHIFT); |
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regmap_update_bits(aud2htx->regmap, AUD2HTX_CTRL_EXT, |
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AUD2HTX_CTRE_WH_MASK, |
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AUD2HTX_WTMK_HIGH << AUD2HTX_CTRE_WH_SHIFT); |
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snd_soc_dai_init_dma_data(cpu_dai, &aud2htx->dma_params_tx, |
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&aud2htx->dma_params_rx); |
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return 0; |
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} |
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static struct snd_soc_dai_driver fsl_aud2htx_dai = { |
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.probe = fsl_aud2htx_dai_probe, |
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.playback = { |
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.stream_name = "CPU-Playback", |
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.channels_min = 1, |
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.channels_max = 8, |
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.rates = SNDRV_PCM_RATE_32000 | |
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SNDRV_PCM_RATE_44100 | |
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SNDRV_PCM_RATE_48000 | |
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SNDRV_PCM_RATE_88200 | |
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SNDRV_PCM_RATE_96000 | |
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SNDRV_PCM_RATE_176400 | |
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SNDRV_PCM_RATE_192000, |
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.formats = FSL_AUD2HTX_FORMATS, |
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}, |
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.ops = &fsl_aud2htx_dai_ops, |
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}; |
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static const struct snd_soc_component_driver fsl_aud2htx_component = { |
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.name = "fsl-aud2htx", |
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}; |
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static const struct reg_default fsl_aud2htx_reg_defaults[] = { |
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{AUD2HTX_CTRL, 0x00000000}, |
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{AUD2HTX_CTRL_EXT, 0x00000000}, |
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{AUD2HTX_WR, 0x00000000}, |
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{AUD2HTX_STATUS, 0x00000000}, |
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{AUD2HTX_IRQ_NOMASK, 0x00000000}, |
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{AUD2HTX_IRQ_MASKED, 0x00000000}, |
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{AUD2HTX_IRQ_MASK, 0x00000000}, |
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}; |
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static bool fsl_aud2htx_readable_reg(struct device *dev, unsigned int reg) |
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{ |
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switch (reg) { |
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case AUD2HTX_CTRL: |
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case AUD2HTX_CTRL_EXT: |
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case AUD2HTX_STATUS: |
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case AUD2HTX_IRQ_NOMASK: |
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case AUD2HTX_IRQ_MASKED: |
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case AUD2HTX_IRQ_MASK: |
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return true; |
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default: |
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return false; |
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} |
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} |
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static bool fsl_aud2htx_writeable_reg(struct device *dev, unsigned int reg) |
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{ |
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switch (reg) { |
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case AUD2HTX_CTRL: |
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case AUD2HTX_CTRL_EXT: |
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case AUD2HTX_WR: |
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case AUD2HTX_IRQ_NOMASK: |
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case AUD2HTX_IRQ_MASKED: |
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case AUD2HTX_IRQ_MASK: |
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return true; |
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default: |
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return false; |
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} |
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} |
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static bool fsl_aud2htx_volatile_reg(struct device *dev, unsigned int reg) |
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{ |
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switch (reg) { |
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case AUD2HTX_STATUS: |
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case AUD2HTX_IRQ_NOMASK: |
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case AUD2HTX_IRQ_MASKED: |
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return true; |
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default: |
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return false; |
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} |
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} |
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static const struct regmap_config fsl_aud2htx_regmap_config = { |
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.reg_bits = 32, |
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.reg_stride = 4, |
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.val_bits = 32, |
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.max_register = AUD2HTX_IRQ_MASK, |
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.reg_defaults = fsl_aud2htx_reg_defaults, |
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.num_reg_defaults = ARRAY_SIZE(fsl_aud2htx_reg_defaults), |
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.readable_reg = fsl_aud2htx_readable_reg, |
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.volatile_reg = fsl_aud2htx_volatile_reg, |
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.writeable_reg = fsl_aud2htx_writeable_reg, |
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.cache_type = REGCACHE_RBTREE, |
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}; |
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static const struct of_device_id fsl_aud2htx_dt_ids[] = { |
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{ .compatible = "fsl,imx8mp-aud2htx",}, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(of, fsl_aud2htx_dt_ids); |
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static irqreturn_t fsl_aud2htx_isr(int irq, void *dev_id) |
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{ |
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return IRQ_HANDLED; |
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} |
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static int fsl_aud2htx_probe(struct platform_device *pdev) |
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{ |
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struct fsl_aud2htx *aud2htx; |
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struct resource *res; |
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void __iomem *regs; |
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int ret, irq; |
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aud2htx = devm_kzalloc(&pdev->dev, sizeof(*aud2htx), GFP_KERNEL); |
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if (!aud2htx) |
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return -ENOMEM; |
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aud2htx->pdev = pdev; |
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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regs = devm_ioremap_resource(&pdev->dev, res); |
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if (IS_ERR(regs)) { |
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dev_err(&pdev->dev, "failed ioremap\n"); |
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return PTR_ERR(regs); |
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} |
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aud2htx->regmap = devm_regmap_init_mmio(&pdev->dev, regs, |
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&fsl_aud2htx_regmap_config); |
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if (IS_ERR(aud2htx->regmap)) { |
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dev_err(&pdev->dev, "failed to init regmap"); |
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return PTR_ERR(aud2htx->regmap); |
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} |
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irq = platform_get_irq(pdev, 0); |
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if (irq < 0) |
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return irq; |
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ret = devm_request_irq(&pdev->dev, irq, fsl_aud2htx_isr, 0, |
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dev_name(&pdev->dev), aud2htx); |
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if (ret) { |
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dev_err(&pdev->dev, "failed to claim irq %u: %d\n", irq, ret); |
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return ret; |
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} |
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aud2htx->bus_clk = devm_clk_get(&pdev->dev, "bus"); |
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if (IS_ERR(aud2htx->bus_clk)) { |
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dev_err(&pdev->dev, "failed to get mem clock\n"); |
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return PTR_ERR(aud2htx->bus_clk); |
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} |
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aud2htx->dma_params_tx.chan_name = "tx"; |
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aud2htx->dma_params_tx.maxburst = AUD2HTX_MAXBURST; |
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aud2htx->dma_params_tx.addr = res->start + AUD2HTX_WR; |
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platform_set_drvdata(pdev, aud2htx); |
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pm_runtime_enable(&pdev->dev); |
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regcache_cache_only(aud2htx->regmap, true); |
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ret = devm_snd_soc_register_component(&pdev->dev, |
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&fsl_aud2htx_component, |
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&fsl_aud2htx_dai, 1); |
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if (ret) { |
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dev_err(&pdev->dev, "failed to register ASoC DAI\n"); |
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return ret; |
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} |
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ret = imx_pcm_dma_init(pdev, IMX_DEFAULT_DMABUF_SIZE); |
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if (ret) |
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dev_err(&pdev->dev, "failed to init imx pcm dma: %d\n", ret); |
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return ret; |
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} |
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static int fsl_aud2htx_remove(struct platform_device *pdev) |
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{ |
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pm_runtime_disable(&pdev->dev); |
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return 0; |
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} |
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static int __maybe_unused fsl_aud2htx_runtime_suspend(struct device *dev) |
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{ |
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struct fsl_aud2htx *aud2htx = dev_get_drvdata(dev); |
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regcache_cache_only(aud2htx->regmap, true); |
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clk_disable_unprepare(aud2htx->bus_clk); |
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return 0; |
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} |
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static int __maybe_unused fsl_aud2htx_runtime_resume(struct device *dev) |
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{ |
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struct fsl_aud2htx *aud2htx = dev_get_drvdata(dev); |
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int ret; |
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ret = clk_prepare_enable(aud2htx->bus_clk); |
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if (ret) |
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return ret; |
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regcache_cache_only(aud2htx->regmap, false); |
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regcache_mark_dirty(aud2htx->regmap); |
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regcache_sync(aud2htx->regmap); |
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return 0; |
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} |
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static const struct dev_pm_ops fsl_aud2htx_pm_ops = { |
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SET_RUNTIME_PM_OPS(fsl_aud2htx_runtime_suspend, |
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fsl_aud2htx_runtime_resume, |
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NULL) |
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SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, |
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pm_runtime_force_resume) |
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}; |
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static struct platform_driver fsl_aud2htx_driver = { |
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.probe = fsl_aud2htx_probe, |
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.remove = fsl_aud2htx_remove, |
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.driver = { |
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.name = "fsl-aud2htx", |
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.pm = &fsl_aud2htx_pm_ops, |
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.of_match_table = fsl_aud2htx_dt_ids, |
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}, |
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}; |
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module_platform_driver(fsl_aud2htx_driver); |
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MODULE_AUTHOR("Shengjiu Wang <[email protected]>"); |
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MODULE_DESCRIPTION("NXP AUD2HTX driver"); |
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MODULE_LICENSE("GPL v2");
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