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Diffstat (limited to 'sound/soc/tegra/tegra20_i2s.c')
-rw-r--r--sound/soc/tegra/tegra20_i2s.c153
1 files changed, 100 insertions, 53 deletions
diff --git a/sound/soc/tegra/tegra20_i2s.c b/sound/soc/tegra/tegra20_i2s.c
index 26253c2849e7..51df0835ce3e 100644
--- a/sound/soc/tegra/tegra20_i2s.c
+++ b/sound/soc/tegra/tegra20_i2s.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* tegra20_i2s.c - Tegra20 I2S driver
*
@@ -11,21 +12,6 @@
*
* Copyright (C) 2010 Google, Inc.
* Iliyan Malchev <malchev@google.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
*/
#include <linux/clk.h>
@@ -36,6 +22,7 @@
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
+#include <linux/reset.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
@@ -51,6 +38,8 @@ static int tegra20_i2s_runtime_suspend(struct device *dev)
{
struct tegra20_i2s *i2s = dev_get_drvdata(dev);
+ regcache_cache_only(i2s->regmap, true);
+
clk_disable_unprepare(i2s->clk_i2s);
return 0;
@@ -61,13 +50,35 @@ static int tegra20_i2s_runtime_resume(struct device *dev)
struct tegra20_i2s *i2s = dev_get_drvdata(dev);
int ret;
+ ret = reset_control_assert(i2s->reset);
+ if (ret)
+ return ret;
+
ret = clk_prepare_enable(i2s->clk_i2s);
if (ret) {
dev_err(dev, "clk_enable failed: %d\n", ret);
return ret;
}
+ usleep_range(10, 100);
+
+ ret = reset_control_deassert(i2s->reset);
+ if (ret)
+ goto disable_clocks;
+
+ regcache_cache_only(i2s->regmap, false);
+ regcache_mark_dirty(i2s->regmap);
+
+ ret = regcache_sync(i2s->regmap);
+ if (ret)
+ goto disable_clocks;
+
return 0;
+
+disable_clocks:
+ clk_disable_unprepare(i2s->clk_i2s);
+
+ return ret;
}
static int tegra20_i2s_set_fmt(struct snd_soc_dai *dai,
@@ -84,11 +95,11 @@ static int tegra20_i2s_set_fmt(struct snd_soc_dai *dai,
}
mask |= TEGRA20_I2S_CTRL_MASTER_ENABLE;
- switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
- case SND_SOC_DAIFMT_CBS_CFS:
+ switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+ case SND_SOC_DAIFMT_BP_FP:
val |= TEGRA20_I2S_CTRL_MASTER_ENABLE;
break;
- case SND_SOC_DAIFMT_CBM_CFM:
+ case SND_SOC_DAIFMT_BC_FC:
break;
default:
return -EINVAL;
@@ -245,20 +256,68 @@ static int tegra20_i2s_probe(struct snd_soc_dai *dai)
{
struct tegra20_i2s *i2s = snd_soc_dai_get_drvdata(dai);
- dai->capture_dma_data = &i2s->capture_dma_data;
- dai->playback_dma_data = &i2s->playback_dma_data;
+ snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data,
+ &i2s->capture_dma_data);
return 0;
}
+static const unsigned int tegra20_i2s_rates[] = {
+ 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000, 88200, 96000
+};
+
+static int tegra20_i2s_filter_rates(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_interval *r = hw_param_interval(params, rule->var);
+ struct snd_soc_dai *dai = rule->private;
+ struct tegra20_i2s *i2s = dev_get_drvdata(dai->dev);
+ struct clk *parent = clk_get_parent(i2s->clk_i2s);
+ unsigned long i, parent_rate, valid_rates = 0;
+
+ parent_rate = clk_get_rate(parent);
+ if (!parent_rate) {
+ dev_err(dai->dev, "Can't get parent clock rate\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(tegra20_i2s_rates); i++) {
+ if (parent_rate % (tegra20_i2s_rates[i] * 128) == 0)
+ valid_rates |= BIT(i);
+ }
+
+ /*
+ * At least one rate must be valid, otherwise the parent clock isn't
+ * audio PLL. Nothing should be filtered in this case.
+ */
+ if (!valid_rates)
+ valid_rates = BIT(ARRAY_SIZE(tegra20_i2s_rates)) - 1;
+
+ return snd_interval_list(r, ARRAY_SIZE(tegra20_i2s_rates),
+ tegra20_i2s_rates, valid_rates);
+}
+
+static int tegra20_i2s_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ if (!device_property_read_bool(dai->dev, "nvidia,fixed-parent-rate"))
+ return 0;
+
+ return snd_pcm_hw_rule_add(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ tegra20_i2s_filter_rates, dai,
+ SNDRV_PCM_HW_PARAM_RATE, -1);
+}
+
static const struct snd_soc_dai_ops tegra20_i2s_dai_ops = {
+ .probe = tegra20_i2s_probe,
.set_fmt = tegra20_i2s_set_fmt,
.hw_params = tegra20_i2s_hw_params,
.trigger = tegra20_i2s_trigger,
+ .startup = tegra20_i2s_startup,
};
static const struct snd_soc_dai_driver tegra20_i2s_dai_template = {
- .probe = tegra20_i2s_probe,
.playback = {
.stream_name = "Playback",
.channels_min = 2,
@@ -274,11 +333,12 @@ static const struct snd_soc_dai_driver tegra20_i2s_dai_template = {
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &tegra20_i2s_dai_ops,
- .symmetric_rates = 1,
+ .symmetric_rate = 1,
};
static const struct snd_soc_component_driver tegra20_i2s_component = {
- .name = DRV_NAME,
+ .name = DRV_NAME,
+ .legacy_dai_naming = 1,
};
static bool tegra20_i2s_wr_rd_reg(struct device *dev, unsigned int reg)
@@ -353,18 +413,23 @@ static int tegra20_i2s_platform_probe(struct platform_device *pdev)
i2s->dai = tegra20_i2s_dai_template;
i2s->dai.name = dev_name(&pdev->dev);
- i2s->clk_i2s = clk_get(&pdev->dev, NULL);
+ i2s->reset = devm_reset_control_get_exclusive(&pdev->dev, "i2s");
+ if (IS_ERR(i2s->reset)) {
+ dev_err(&pdev->dev, "Can't retrieve i2s reset\n");
+ return PTR_ERR(i2s->reset);
+ }
+
+ i2s->clk_i2s = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(i2s->clk_i2s)) {
dev_err(&pdev->dev, "Can't retrieve i2s clock\n");
ret = PTR_ERR(i2s->clk_i2s);
goto err;
}
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- regs = devm_ioremap_resource(&pdev->dev, mem);
+ regs = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
if (IS_ERR(regs)) {
ret = PTR_ERR(regs);
- goto err_clk_put;
+ goto err;
}
i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
@@ -372,7 +437,7 @@ static int tegra20_i2s_platform_probe(struct platform_device *pdev)
if (IS_ERR(i2s->regmap)) {
dev_err(&pdev->dev, "regmap init failed\n");
ret = PTR_ERR(i2s->regmap);
- goto err_clk_put;
+ goto err;
}
i2s->capture_dma_data.addr = mem->start + TEGRA20_I2S_FIFO2;
@@ -384,18 +449,13 @@ static int tegra20_i2s_platform_probe(struct platform_device *pdev)
i2s->playback_dma_data.maxburst = 4;
pm_runtime_enable(&pdev->dev);
- if (!pm_runtime_enabled(&pdev->dev)) {
- ret = tegra20_i2s_runtime_resume(&pdev->dev);
- if (ret)
- goto err_pm_disable;
- }
ret = snd_soc_register_component(&pdev->dev, &tegra20_i2s_component,
&i2s->dai, 1);
if (ret) {
dev_err(&pdev->dev, "Could not register DAI: %d\n", ret);
ret = -ENOMEM;
- goto err_suspend;
+ goto err_pm_disable;
}
ret = tegra_pcm_platform_register(&pdev->dev);
@@ -408,31 +468,17 @@ static int tegra20_i2s_platform_probe(struct platform_device *pdev)
err_unregister_component:
snd_soc_unregister_component(&pdev->dev);
-err_suspend:
- if (!pm_runtime_status_suspended(&pdev->dev))
- tegra20_i2s_runtime_suspend(&pdev->dev);
err_pm_disable:
pm_runtime_disable(&pdev->dev);
-err_clk_put:
- clk_put(i2s->clk_i2s);
err:
return ret;
}
-static int tegra20_i2s_platform_remove(struct platform_device *pdev)
+static void tegra20_i2s_platform_remove(struct platform_device *pdev)
{
- struct tegra20_i2s *i2s = dev_get_drvdata(&pdev->dev);
-
- pm_runtime_disable(&pdev->dev);
- if (!pm_runtime_status_suspended(&pdev->dev))
- tegra20_i2s_runtime_suspend(&pdev->dev);
-
tegra_pcm_platform_unregister(&pdev->dev);
snd_soc_unregister_component(&pdev->dev);
-
- clk_put(i2s->clk_i2s);
-
- return 0;
+ pm_runtime_disable(&pdev->dev);
}
static const struct of_device_id tegra20_i2s_of_match[] = {
@@ -441,15 +487,16 @@ static const struct of_device_id tegra20_i2s_of_match[] = {
};
static const struct dev_pm_ops tegra20_i2s_pm_ops = {
- SET_RUNTIME_PM_OPS(tegra20_i2s_runtime_suspend,
- tegra20_i2s_runtime_resume, NULL)
+ RUNTIME_PM_OPS(tegra20_i2s_runtime_suspend,
+ tegra20_i2s_runtime_resume, NULL)
+ SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
};
static struct platform_driver tegra20_i2s_driver = {
.driver = {
.name = DRV_NAME,
.of_match_table = tegra20_i2s_of_match,
- .pm = &tegra20_i2s_pm_ops,
+ .pm = pm_ptr(&tegra20_i2s_pm_ops),
},
.probe = tegra20_i2s_platform_probe,
.remove = tegra20_i2s_platform_remove,
generated by cgit (git 2.34.1) at 2025-12-25 23:00:16 +0000