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317 lines
8.2 KiB
317 lines
8.2 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// Copyright 2018-2021 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/rpmsg.h> |
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#include <linux/slab.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 "fsl_rpmsg.h" |
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#include "imx-pcm.h" |
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#define FSL_RPMSG_RATES (SNDRV_PCM_RATE_8000 | \ |
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SNDRV_PCM_RATE_16000 | \ |
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SNDRV_PCM_RATE_48000) |
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#define FSL_RPMSG_FORMATS SNDRV_PCM_FMTBIT_S16_LE |
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/* 192kHz/32bit/2ch/60s size is 0x574e00 */ |
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#define LPA_LARGE_BUFFER_SIZE (0x6000000) |
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static const unsigned int fsl_rpmsg_rates[] = { |
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8000, 11025, 16000, 22050, 44100, |
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32000, 48000, 96000, 88200, 176400, 192000, |
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352800, 384000, 705600, 768000, 1411200, 2822400, |
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}; |
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static const struct snd_pcm_hw_constraint_list fsl_rpmsg_rate_constraints = { |
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.count = ARRAY_SIZE(fsl_rpmsg_rates), |
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.list = fsl_rpmsg_rates, |
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}; |
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static int fsl_rpmsg_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *dai) |
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{ |
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struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai); |
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struct clk *p = rpmsg->mclk, *pll = NULL, *npll = NULL; |
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u64 rate = params_rate(params); |
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int ret = 0; |
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/* Get current pll parent */ |
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while (p && rpmsg->pll8k && rpmsg->pll11k) { |
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struct clk *pp = clk_get_parent(p); |
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if (clk_is_match(pp, rpmsg->pll8k) || |
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clk_is_match(pp, rpmsg->pll11k)) { |
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pll = pp; |
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break; |
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} |
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p = pp; |
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} |
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/* Switch to another pll parent if needed. */ |
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if (pll) { |
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npll = (do_div(rate, 8000) ? rpmsg->pll11k : rpmsg->pll8k); |
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if (!clk_is_match(pll, npll)) { |
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ret = clk_set_parent(p, npll); |
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if (ret < 0) |
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dev_warn(dai->dev, "failed to set parent %s: %d\n", |
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__clk_get_name(npll), ret); |
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} |
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} |
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if (!(rpmsg->mclk_streams & BIT(substream->stream))) { |
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ret = clk_prepare_enable(rpmsg->mclk); |
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if (ret) { |
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dev_err(dai->dev, "failed to enable mclk: %d\n", ret); |
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return ret; |
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} |
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rpmsg->mclk_streams |= BIT(substream->stream); |
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} |
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return ret; |
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} |
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static int fsl_rpmsg_hw_free(struct snd_pcm_substream *substream, |
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struct snd_soc_dai *dai) |
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{ |
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struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai); |
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if (rpmsg->mclk_streams & BIT(substream->stream)) { |
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clk_disable_unprepare(rpmsg->mclk); |
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rpmsg->mclk_streams &= ~BIT(substream->stream); |
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} |
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return 0; |
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} |
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static int fsl_rpmsg_startup(struct snd_pcm_substream *substream, |
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struct snd_soc_dai *cpu_dai) |
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{ |
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int ret; |
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ret = snd_pcm_hw_constraint_list(substream->runtime, 0, |
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SNDRV_PCM_HW_PARAM_RATE, |
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&fsl_rpmsg_rate_constraints); |
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return ret; |
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} |
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static const struct snd_soc_dai_ops fsl_rpmsg_dai_ops = { |
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.startup = fsl_rpmsg_startup, |
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.hw_params = fsl_rpmsg_hw_params, |
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.hw_free = fsl_rpmsg_hw_free, |
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}; |
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static struct snd_soc_dai_driver fsl_rpmsg_dai = { |
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.playback = { |
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.stream_name = "CPU-Playback", |
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.channels_min = 2, |
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.channels_max = 2, |
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.rates = SNDRV_PCM_RATE_KNOT, |
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.formats = FSL_RPMSG_FORMATS, |
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}, |
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.capture = { |
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.stream_name = "CPU-Capture", |
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.channels_min = 2, |
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.channels_max = 2, |
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.rates = SNDRV_PCM_RATE_KNOT, |
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.formats = FSL_RPMSG_FORMATS, |
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}, |
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.symmetric_rate = 1, |
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.symmetric_channels = 1, |
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.symmetric_sample_bits = 1, |
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.ops = &fsl_rpmsg_dai_ops, |
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}; |
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static const struct snd_soc_component_driver fsl_component = { |
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.name = "fsl-rpmsg", |
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.legacy_dai_naming = 1, |
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}; |
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static const struct fsl_rpmsg_soc_data imx7ulp_data = { |
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.rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | |
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SNDRV_PCM_RATE_48000, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE, |
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}; |
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static const struct fsl_rpmsg_soc_data imx8mm_data = { |
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.rates = SNDRV_PCM_RATE_KNOT, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | |
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SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_DSD_U8 | |
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SNDRV_PCM_FMTBIT_DSD_U16_LE | SNDRV_PCM_FMTBIT_DSD_U32_LE, |
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}; |
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static const struct fsl_rpmsg_soc_data imx8mn_data = { |
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.rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | |
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | |
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SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | |
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SNDRV_PCM_RATE_192000, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | |
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SNDRV_PCM_FMTBIT_S32_LE, |
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}; |
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static const struct fsl_rpmsg_soc_data imx8mp_data = { |
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.rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | |
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | |
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SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | |
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SNDRV_PCM_RATE_192000, |
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | |
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SNDRV_PCM_FMTBIT_S32_LE, |
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}; |
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static const struct of_device_id fsl_rpmsg_ids[] = { |
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{ .compatible = "fsl,imx7ulp-rpmsg-audio", .data = &imx7ulp_data}, |
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{ .compatible = "fsl,imx8mm-rpmsg-audio", .data = &imx8mm_data}, |
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{ .compatible = "fsl,imx8mn-rpmsg-audio", .data = &imx8mn_data}, |
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{ .compatible = "fsl,imx8mp-rpmsg-audio", .data = &imx8mp_data}, |
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{ .compatible = "fsl,imx8ulp-rpmsg-audio", .data = &imx7ulp_data}, |
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{ /* sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(of, fsl_rpmsg_ids); |
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static int fsl_rpmsg_probe(struct platform_device *pdev) |
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{ |
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struct device_node *np = pdev->dev.of_node; |
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struct fsl_rpmsg *rpmsg; |
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int ret; |
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rpmsg = devm_kzalloc(&pdev->dev, sizeof(struct fsl_rpmsg), GFP_KERNEL); |
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if (!rpmsg) |
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return -ENOMEM; |
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rpmsg->soc_data = of_device_get_match_data(&pdev->dev); |
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fsl_rpmsg_dai.playback.rates = rpmsg->soc_data->rates; |
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fsl_rpmsg_dai.capture.rates = rpmsg->soc_data->rates; |
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fsl_rpmsg_dai.playback.formats = rpmsg->soc_data->formats; |
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fsl_rpmsg_dai.capture.formats = rpmsg->soc_data->formats; |
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if (of_property_read_bool(np, "fsl,enable-lpa")) { |
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rpmsg->enable_lpa = 1; |
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rpmsg->buffer_size = LPA_LARGE_BUFFER_SIZE; |
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} else { |
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rpmsg->buffer_size = IMX_DEFAULT_DMABUF_SIZE; |
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} |
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/* Get the optional clocks */ |
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rpmsg->ipg = devm_clk_get_optional(&pdev->dev, "ipg"); |
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if (IS_ERR(rpmsg->ipg)) |
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return PTR_ERR(rpmsg->ipg); |
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rpmsg->mclk = devm_clk_get_optional(&pdev->dev, "mclk"); |
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if (IS_ERR(rpmsg->mclk)) |
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return PTR_ERR(rpmsg->mclk); |
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rpmsg->dma = devm_clk_get_optional(&pdev->dev, "dma"); |
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if (IS_ERR(rpmsg->dma)) |
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return PTR_ERR(rpmsg->dma); |
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rpmsg->pll8k = devm_clk_get_optional(&pdev->dev, "pll8k"); |
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if (IS_ERR(rpmsg->pll8k)) |
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return PTR_ERR(rpmsg->pll8k); |
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rpmsg->pll11k = devm_clk_get_optional(&pdev->dev, "pll11k"); |
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if (IS_ERR(rpmsg->pll11k)) |
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return PTR_ERR(rpmsg->pll11k); |
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platform_set_drvdata(pdev, rpmsg); |
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pm_runtime_enable(&pdev->dev); |
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ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component, |
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&fsl_rpmsg_dai, 1); |
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if (ret) |
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return ret; |
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rpmsg->card_pdev = platform_device_register_data(&pdev->dev, |
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"imx-audio-rpmsg", |
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PLATFORM_DEVID_NONE, |
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NULL, |
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0); |
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if (IS_ERR(rpmsg->card_pdev)) { |
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dev_err(&pdev->dev, "failed to register rpmsg card\n"); |
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ret = PTR_ERR(rpmsg->card_pdev); |
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return ret; |
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} |
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return 0; |
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} |
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static int fsl_rpmsg_remove(struct platform_device *pdev) |
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{ |
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struct fsl_rpmsg *rpmsg = platform_get_drvdata(pdev); |
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if (rpmsg->card_pdev) |
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platform_device_unregister(rpmsg->card_pdev); |
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return 0; |
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} |
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#ifdef CONFIG_PM |
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static int fsl_rpmsg_runtime_resume(struct device *dev) |
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{ |
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struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev); |
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int ret; |
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ret = clk_prepare_enable(rpmsg->ipg); |
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if (ret) { |
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dev_err(dev, "failed to enable ipg clock: %d\n", ret); |
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goto ipg_err; |
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} |
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ret = clk_prepare_enable(rpmsg->dma); |
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if (ret) { |
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dev_err(dev, "Failed to enable dma clock %d\n", ret); |
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goto dma_err; |
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} |
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return 0; |
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dma_err: |
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clk_disable_unprepare(rpmsg->ipg); |
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ipg_err: |
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return ret; |
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} |
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static int fsl_rpmsg_runtime_suspend(struct device *dev) |
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{ |
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struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev); |
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clk_disable_unprepare(rpmsg->dma); |
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clk_disable_unprepare(rpmsg->ipg); |
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return 0; |
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} |
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#endif |
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static const struct dev_pm_ops fsl_rpmsg_pm_ops = { |
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SET_RUNTIME_PM_OPS(fsl_rpmsg_runtime_suspend, |
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fsl_rpmsg_runtime_resume, |
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NULL) |
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}; |
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static struct platform_driver fsl_rpmsg_driver = { |
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.probe = fsl_rpmsg_probe, |
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.remove = fsl_rpmsg_remove, |
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.driver = { |
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.name = "fsl_rpmsg", |
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.pm = &fsl_rpmsg_pm_ops, |
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.of_match_table = fsl_rpmsg_ids, |
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}, |
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}; |
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module_platform_driver(fsl_rpmsg_driver); |
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MODULE_DESCRIPTION("Freescale SoC Audio PRMSG CPU Interface"); |
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MODULE_AUTHOR("Shengjiu Wang <[email protected]>"); |
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MODULE_ALIAS("platform:fsl_rpmsg"); |
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MODULE_LICENSE("GPL");
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