diff options
Diffstat (limited to 'sound/soc/img/img-i2s-in.c')
| -rw-r--r-- | sound/soc/img/img-i2s-in.c | 171 |
1 files changed, 134 insertions, 37 deletions
diff --git a/sound/soc/img/img-i2s-in.c b/sound/soc/img/img-i2s-in.c index 0389203f8560..98d2ab68883a 100644 --- a/sound/soc/img/img-i2s-in.c +++ b/sound/soc/img/img-i2s-in.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * IMG I2S input controller driver * * Copyright (C) 2015 Imagination Technologies Ltd. * * Author: Damien Horsley <Damien.Horsley@imgtec.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. */ #include <linux/clk.h> @@ -16,6 +13,7 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/reset.h> #include <sound/core.h> @@ -60,8 +58,33 @@ struct img_i2s_in { void __iomem *channel_base; unsigned int active_channels; struct snd_soc_dai_driver dai_driver; + u32 suspend_ctl; + u32 *suspend_ch_ctl; }; +static int img_i2s_in_runtime_suspend(struct device *dev) +{ + struct img_i2s_in *i2s = dev_get_drvdata(dev); + + clk_disable_unprepare(i2s->clk_sys); + + return 0; +} + +static int img_i2s_in_runtime_resume(struct device *dev) +{ + struct img_i2s_in *i2s = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(i2s->clk_sys); + if (ret) { + dev_err(dev, "Unable to enable sys clock\n"); + return ret; + } + + return 0; +} + static inline void img_i2s_in_writel(struct img_i2s_in *i2s, u32 val, u32 reg) { writel(val, i2s->base + reg); @@ -279,7 +302,7 @@ static int img_i2s_in_hw_params(struct snd_pcm_substream *substream, static int img_i2s_in_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai); - int i; + int i, ret; u32 chan_control_mask, lrd_set = 0, blkp_set = 0, chan_control_set = 0; u32 reg; @@ -310,8 +333,8 @@ static int img_i2s_in_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) return -EINVAL; } - switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { - case SND_SOC_DAIFMT_CBM_CFM: + switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { + case SND_SOC_DAIFMT_BC_FC: break; default: return -EINVAL; @@ -319,6 +342,10 @@ static int img_i2s_in_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) chan_control_mask = IMG_I2S_IN_CH_CTL_CLK_TRANS_MASK; + ret = pm_runtime_resume_and_get(i2s->dev); + if (ret < 0) + return ret; + for (i = 0; i < i2s->active_channels; i++) img_i2s_in_ch_disable(i2s, i); @@ -338,15 +365,11 @@ static int img_i2s_in_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) for (i = 0; i < i2s->active_channels; i++) img_i2s_in_ch_enable(i2s, i); + pm_runtime_put(i2s->dev); + return 0; } -static const struct snd_soc_dai_ops img_i2s_in_dai_ops = { - .trigger = img_i2s_in_trigger, - .hw_params = img_i2s_in_hw_params, - .set_fmt = img_i2s_in_set_fmt -}; - static int img_i2s_in_dai_probe(struct snd_soc_dai *dai) { struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai); @@ -356,19 +379,27 @@ static int img_i2s_in_dai_probe(struct snd_soc_dai *dai) return 0; } +static const struct snd_soc_dai_ops img_i2s_in_dai_ops = { + .probe = img_i2s_in_dai_probe, + .trigger = img_i2s_in_trigger, + .hw_params = img_i2s_in_hw_params, + .set_fmt = img_i2s_in_set_fmt +}; + static const struct snd_soc_component_driver img_i2s_in_component = { - .name = "img-i2s-in" + .name = "img-i2s-in", + .legacy_dai_naming = 1, }; static int img_i2s_in_dma_prepare_slave_config(struct snd_pcm_substream *st, struct snd_pcm_hw_params *params, struct dma_slave_config *sc) { unsigned int i2s_channels = params_channels(params) / 2; - struct snd_soc_pcm_runtime *rtd = st->private_data; + struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(st); struct snd_dmaengine_dai_dma_data *dma_data; int ret; - dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, st); + dma_data = snd_soc_dai_get_dma_data(snd_soc_rtd_to_cpu(rtd, 0), st); ret = snd_hwparams_to_dma_slave_config(st, params, sc); if (ret) @@ -403,8 +434,7 @@ static int img_i2s_in_probe(struct platform_device *pdev) i2s->dev = dev; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - base = devm_ioremap_resource(dev, res); + base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); if (IS_ERR(base)) return PTR_ERR(base); @@ -421,21 +451,24 @@ static int img_i2s_in_probe(struct platform_device *pdev) i2s->channel_base = base + (max_i2s_chan_pow_2 * 0x20); i2s->clk_sys = devm_clk_get(dev, "sys"); - if (IS_ERR(i2s->clk_sys)) { - if (PTR_ERR(i2s->clk_sys) != -EPROBE_DEFER) - dev_err(dev, "Failed to acquire clock 'sys'\n"); - return PTR_ERR(i2s->clk_sys); + if (IS_ERR(i2s->clk_sys)) + return dev_err_probe(dev, PTR_ERR(i2s->clk_sys), + "Failed to acquire clock 'sys'\n"); + + pm_runtime_enable(&pdev->dev); + if (!pm_runtime_enabled(&pdev->dev)) { + ret = img_i2s_in_runtime_resume(&pdev->dev); + if (ret) + goto err_pm_disable; } - - ret = clk_prepare_enable(i2s->clk_sys); - if (ret) - return ret; + ret = pm_runtime_resume_and_get(&pdev->dev); + if (ret < 0) + goto err_suspend; i2s->active_channels = 1; i2s->dma_data.addr = res->start + IMG_I2S_IN_RX_FIFO; i2s->dma_data.addr_width = 4; - i2s->dai_driver.probe = img_i2s_in_dai_probe; i2s->dai_driver.capture.channels_min = 2; i2s->dai_driver.capture.channels_max = i2s->max_i2s_chan * 2; i2s->dai_driver.capture.rates = SNDRV_PCM_RATE_8000_192000; @@ -443,11 +476,12 @@ static int img_i2s_in_probe(struct platform_device *pdev) SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE; i2s->dai_driver.ops = &img_i2s_in_dai_ops; - rst = devm_reset_control_get(dev, "rst"); + rst = devm_reset_control_get_exclusive(dev, "rst"); if (IS_ERR(rst)) { if (PTR_ERR(rst) == -EPROBE_DEFER) { ret = -EPROBE_DEFER; - goto err_clk_disable; + pm_runtime_put(&pdev->dev); + goto err_suspend; } dev_dbg(dev, "No top level reset found\n"); @@ -469,28 +503,85 @@ static int img_i2s_in_probe(struct platform_device *pdev) IMG_I2S_IN_CH_CTL_JUST_MASK | IMG_I2S_IN_CH_CTL_FW_MASK, IMG_I2S_IN_CH_CTL); + pm_runtime_put(&pdev->dev); + + i2s->suspend_ch_ctl = devm_kcalloc(dev, + i2s->max_i2s_chan, sizeof(*i2s->suspend_ch_ctl), GFP_KERNEL); + if (!i2s->suspend_ch_ctl) { + ret = -ENOMEM; + goto err_suspend; + } + ret = devm_snd_soc_register_component(dev, &img_i2s_in_component, &i2s->dai_driver, 1); if (ret) - goto err_clk_disable; + goto err_suspend; ret = devm_snd_dmaengine_pcm_register(dev, &img_i2s_in_dma_config, 0); if (ret) - goto err_clk_disable; + goto err_suspend; return 0; -err_clk_disable: - clk_disable_unprepare(i2s->clk_sys); +err_suspend: + if (!pm_runtime_enabled(&pdev->dev)) + img_i2s_in_runtime_suspend(&pdev->dev); +err_pm_disable: + pm_runtime_disable(&pdev->dev); return ret; } -static int img_i2s_in_dev_remove(struct platform_device *pdev) +static void img_i2s_in_dev_remove(struct platform_device *pdev) { - struct img_i2s_in *i2s = platform_get_drvdata(pdev); + pm_runtime_disable(&pdev->dev); + if (!pm_runtime_status_suspended(&pdev->dev)) + img_i2s_in_runtime_suspend(&pdev->dev); +} - clk_disable_unprepare(i2s->clk_sys); +static int img_i2s_in_suspend(struct device *dev) +{ + struct img_i2s_in *i2s = dev_get_drvdata(dev); + int i, ret; + u32 reg; + + if (pm_runtime_status_suspended(dev)) { + ret = img_i2s_in_runtime_resume(dev); + if (ret) + return ret; + } + + for (i = 0; i < i2s->max_i2s_chan; i++) { + reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL); + i2s->suspend_ch_ctl[i] = reg; + } + + i2s->suspend_ctl = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL); + + img_i2s_in_runtime_suspend(dev); + + return 0; +} + +static int img_i2s_in_resume(struct device *dev) +{ + struct img_i2s_in *i2s = dev_get_drvdata(dev); + int i, ret; + u32 reg; + + ret = img_i2s_in_runtime_resume(dev); + if (ret) + return ret; + + for (i = 0; i < i2s->max_i2s_chan; i++) { + reg = i2s->suspend_ch_ctl[i]; + img_i2s_in_ch_writel(i2s, i, reg, IMG_I2S_IN_CH_CTL); + } + + img_i2s_in_writel(i2s, i2s->suspend_ctl, IMG_I2S_IN_CTL); + + if (pm_runtime_status_suspended(dev)) + img_i2s_in_runtime_suspend(dev); return 0; } @@ -501,10 +592,16 @@ static const struct of_device_id img_i2s_in_of_match[] = { }; MODULE_DEVICE_TABLE(of, img_i2s_in_of_match); +static const struct dev_pm_ops img_i2s_in_pm_ops = { + RUNTIME_PM_OPS(img_i2s_in_runtime_suspend, img_i2s_in_runtime_resume, NULL) + SYSTEM_SLEEP_PM_OPS(img_i2s_in_suspend, img_i2s_in_resume) +}; + static struct platform_driver img_i2s_in_driver = { .driver = { .name = "img-i2s-in", - .of_match_table = img_i2s_in_of_match + .of_match_table = img_i2s_in_of_match, + .pm = pm_ptr(&img_i2s_in_pm_ops) }, .probe = img_i2s_in_probe, .remove = img_i2s_in_dev_remove |