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![Charles Keepax](/assets/img/avatar_default.png)
Change the legacy DAI naming flag from opting in to the new scheme (non_legacy_dai_naming), to opting out of it (legacy_dai_naming). These drivers appear to be on the CPU side of the DAI link and currently uses the legacy naming, so add the new flag. Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com> Link: https://lore.kernel.org/r/20220623125250.2355471-23-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown <broonie@kernel.org>
269 lines
6.2 KiB
C
269 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2012-2013, Analog Devices Inc.
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* Author: Lars-Peter Clausen <lars@metafoo.de>
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <linux/clk.h>
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#include <linux/regmap.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/initval.h>
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#include <sound/dmaengine_pcm.h>
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#define AXI_SPDIF_REG_CTRL 0x0
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#define AXI_SPDIF_REG_STAT 0x4
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#define AXI_SPDIF_REG_TX_FIFO 0xc
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#define AXI_SPDIF_CTRL_TXDATA BIT(1)
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#define AXI_SPDIF_CTRL_TXEN BIT(0)
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#define AXI_SPDIF_CTRL_CLKDIV_OFFSET 8
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#define AXI_SPDIF_CTRL_CLKDIV_MASK (0xff << 8)
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#define AXI_SPDIF_FREQ_44100 (0x0 << 6)
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#define AXI_SPDIF_FREQ_48000 (0x1 << 6)
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#define AXI_SPDIF_FREQ_32000 (0x2 << 6)
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#define AXI_SPDIF_FREQ_NA (0x3 << 6)
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struct axi_spdif {
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struct regmap *regmap;
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struct clk *clk;
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struct clk *clk_ref;
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struct snd_dmaengine_dai_dma_data dma_data;
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struct snd_ratnum ratnum;
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struct snd_pcm_hw_constraint_ratnums rate_constraints;
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};
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static int axi_spdif_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 axi_spdif *spdif = snd_soc_dai_get_drvdata(dai);
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unsigned int val;
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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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val = AXI_SPDIF_CTRL_TXDATA;
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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val = 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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regmap_update_bits(spdif->regmap, AXI_SPDIF_REG_CTRL,
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AXI_SPDIF_CTRL_TXDATA, val);
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return 0;
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}
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static int axi_spdif_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
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{
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struct axi_spdif *spdif = snd_soc_dai_get_drvdata(dai);
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unsigned int rate = params_rate(params);
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unsigned int clkdiv, stat;
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switch (params_rate(params)) {
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case 32000:
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stat = AXI_SPDIF_FREQ_32000;
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break;
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case 44100:
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stat = AXI_SPDIF_FREQ_44100;
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break;
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case 48000:
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stat = AXI_SPDIF_FREQ_48000;
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break;
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default:
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stat = AXI_SPDIF_FREQ_NA;
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break;
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}
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clkdiv = DIV_ROUND_CLOSEST(clk_get_rate(spdif->clk_ref),
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rate * 64 * 2) - 1;
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clkdiv <<= AXI_SPDIF_CTRL_CLKDIV_OFFSET;
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regmap_write(spdif->regmap, AXI_SPDIF_REG_STAT, stat);
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regmap_update_bits(spdif->regmap, AXI_SPDIF_REG_CTRL,
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AXI_SPDIF_CTRL_CLKDIV_MASK, clkdiv);
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return 0;
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}
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static int axi_spdif_dai_probe(struct snd_soc_dai *dai)
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{
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struct axi_spdif *spdif = snd_soc_dai_get_drvdata(dai);
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snd_soc_dai_init_dma_data(dai, &spdif->dma_data, NULL);
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return 0;
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}
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static int axi_spdif_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct axi_spdif *spdif = snd_soc_dai_get_drvdata(dai);
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int ret;
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ret = snd_pcm_hw_constraint_ratnums(substream->runtime, 0,
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SNDRV_PCM_HW_PARAM_RATE,
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&spdif->rate_constraints);
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if (ret)
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return ret;
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ret = clk_prepare_enable(spdif->clk_ref);
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if (ret)
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return ret;
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regmap_update_bits(spdif->regmap, AXI_SPDIF_REG_CTRL,
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AXI_SPDIF_CTRL_TXEN, AXI_SPDIF_CTRL_TXEN);
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return 0;
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}
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static void axi_spdif_shutdown(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct axi_spdif *spdif = snd_soc_dai_get_drvdata(dai);
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regmap_update_bits(spdif->regmap, AXI_SPDIF_REG_CTRL,
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AXI_SPDIF_CTRL_TXEN, 0);
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clk_disable_unprepare(spdif->clk_ref);
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}
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static const struct snd_soc_dai_ops axi_spdif_dai_ops = {
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.startup = axi_spdif_startup,
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.shutdown = axi_spdif_shutdown,
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.trigger = axi_spdif_trigger,
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.hw_params = axi_spdif_hw_params,
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};
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static struct snd_soc_dai_driver axi_spdif_dai = {
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.probe = axi_spdif_dai_probe,
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.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 = SNDRV_PCM_FMTBIT_S16_LE,
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},
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.ops = &axi_spdif_dai_ops,
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};
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static const struct snd_soc_component_driver axi_spdif_component = {
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.name = "axi-spdif",
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.legacy_dai_naming = 1,
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};
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static const struct regmap_config axi_spdif_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 = AXI_SPDIF_REG_STAT,
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};
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static int axi_spdif_probe(struct platform_device *pdev)
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{
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struct axi_spdif *spdif;
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struct resource *res;
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void __iomem *base;
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int ret;
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spdif = devm_kzalloc(&pdev->dev, sizeof(*spdif), GFP_KERNEL);
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if (!spdif)
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return -ENOMEM;
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platform_set_drvdata(pdev, spdif);
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base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
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if (IS_ERR(base))
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return PTR_ERR(base);
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spdif->regmap = devm_regmap_init_mmio(&pdev->dev, base,
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&axi_spdif_regmap_config);
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if (IS_ERR(spdif->regmap))
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return PTR_ERR(spdif->regmap);
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spdif->clk = devm_clk_get(&pdev->dev, "axi");
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if (IS_ERR(spdif->clk))
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return PTR_ERR(spdif->clk);
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spdif->clk_ref = devm_clk_get(&pdev->dev, "ref");
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if (IS_ERR(spdif->clk_ref))
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return PTR_ERR(spdif->clk_ref);
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ret = clk_prepare_enable(spdif->clk);
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if (ret)
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return ret;
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spdif->dma_data.addr = res->start + AXI_SPDIF_REG_TX_FIFO;
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spdif->dma_data.addr_width = 4;
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spdif->dma_data.maxburst = 1;
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spdif->ratnum.num = clk_get_rate(spdif->clk_ref) / 128;
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spdif->ratnum.den_step = 1;
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spdif->ratnum.den_min = 1;
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spdif->ratnum.den_max = 64;
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spdif->rate_constraints.rats = &spdif->ratnum;
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spdif->rate_constraints.nrats = 1;
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ret = devm_snd_soc_register_component(&pdev->dev, &axi_spdif_component,
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&axi_spdif_dai, 1);
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if (ret)
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goto err_clk_disable;
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ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
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if (ret)
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goto err_clk_disable;
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return 0;
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err_clk_disable:
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clk_disable_unprepare(spdif->clk);
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return ret;
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}
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static int axi_spdif_dev_remove(struct platform_device *pdev)
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{
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struct axi_spdif *spdif = platform_get_drvdata(pdev);
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clk_disable_unprepare(spdif->clk);
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return 0;
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}
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static const struct of_device_id axi_spdif_of_match[] = {
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{ .compatible = "adi,axi-spdif-tx-1.00.a", },
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{},
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};
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MODULE_DEVICE_TABLE(of, axi_spdif_of_match);
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static struct platform_driver axi_spdif_driver = {
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.driver = {
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.name = "axi-spdif",
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.of_match_table = axi_spdif_of_match,
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},
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.probe = axi_spdif_probe,
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.remove = axi_spdif_dev_remove,
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};
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module_platform_driver(axi_spdif_driver);
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MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
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MODULE_DESCRIPTION("AXI SPDIF driver");
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MODULE_LICENSE("GPL");
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