[alsa-devel] Applied "ASoC: img: Add driver for SPDIF output controller" to the asoc tree
Mark Brown
broonie at kernel.org
Wed Nov 4 15:59:14 CET 2015
The patch
ASoC: img: Add driver for SPDIF output controller
has been applied to the asoc tree at
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying
to this mail.
Thanks,
Mark
>From 8f7da2e75b470b82c1b0e0dff209ced49e84bcdc Mon Sep 17 00:00:00 2001
From: "Damien.Horsley" <Damien.Horsley at imgtec.com>
Date: Wed, 4 Nov 2015 14:40:57 +0000
Subject: [PATCH] ASoC: img: Add driver for SPDIF output controller
Add driver for Imagination Technologies SPDIF output
controller
Signed-off-by: Damien.Horsley <Damien.Horsley at imgtec.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
sound/soc/img/Kconfig | 8 +
sound/soc/img/Makefile | 1 +
sound/soc/img/img-spdif-out.c | 441 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 450 insertions(+)
create mode 100644 sound/soc/img/img-spdif-out.c
diff --git a/sound/soc/img/Kconfig b/sound/soc/img/Kconfig
index 161ce90..d08537e 100644
--- a/sound/soc/img/Kconfig
+++ b/sound/soc/img/Kconfig
@@ -34,3 +34,11 @@ config SND_SOC_IMG_SPDIF_IN
help
Say Y or M if you want to add support for SPDIF input driver for
Imagination Technologies SPDIF input device.
+
+config SND_SOC_IMG_SPDIF_OUT
+ tristate "Imagination SPDIF Output Device Driver"
+ depends on SND_SOC_IMG
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+ help
+ Say Y or M if you want to add support for SPDIF out driver for
+ Imagination Technologies SPDIF out device.
diff --git a/sound/soc/img/Makefile b/sound/soc/img/Makefile
index 85ded5e..1a44fb4 100644
--- a/sound/soc/img/Makefile
+++ b/sound/soc/img/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_SND_SOC_IMG_I2S_IN) += img-i2s-in.o
obj-$(CONFIG_SND_SOC_IMG_I2S_OUT) += img-i2s-out.o
obj-$(CONFIG_SND_SOC_IMG_PARALLEL_OUT) += img-parallel-out.o
obj-$(CONFIG_SND_SOC_IMG_SPDIF_IN) += img-spdif-in.o
+obj-$(CONFIG_SND_SOC_IMG_SPDIF_OUT) += img-spdif-out.o
diff --git a/sound/soc/img/img-spdif-out.c b/sound/soc/img/img-spdif-out.c
new file mode 100644
index 0000000..08f93a5
--- /dev/null
+++ b/sound/soc/img/img-spdif-out.c
@@ -0,0 +1,441 @@
+/*
+ * IMG SPDIF output controller driver
+ *
+ * Copyright (C) 2015 Imagination Technologies Ltd.
+ *
+ * Author: Damien Horsley <Damien.Horsley at 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>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#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>
+#include <sound/dmaengine_pcm.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#define IMG_SPDIF_OUT_TX_FIFO 0x0
+
+#define IMG_SPDIF_OUT_CTL 0x4
+#define IMG_SPDIF_OUT_CTL_FS_MASK BIT(4)
+#define IMG_SPDIF_OUT_CTL_CLK_MASK BIT(2)
+#define IMG_SPDIF_OUT_CTL_SRT_MASK BIT(0)
+
+#define IMG_SPDIF_OUT_CSL 0x14
+
+#define IMG_SPDIF_OUT_CSH_UV 0x18
+#define IMG_SPDIF_OUT_CSH_UV_CSH_SHIFT 0
+#define IMG_SPDIF_OUT_CSH_UV_CSH_MASK 0xff
+
+struct img_spdif_out {
+ spinlock_t lock;
+ void __iomem *base;
+ struct clk *clk_sys;
+ struct clk *clk_ref;
+ struct snd_dmaengine_dai_dma_data dma_data;
+ struct device *dev;
+ struct reset_control *rst;
+};
+
+static int img_spdif_out_suspend(struct device *dev)
+{
+ struct img_spdif_out *spdif = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(spdif->clk_ref);
+
+ return 0;
+}
+
+static int img_spdif_out_resume(struct device *dev)
+{
+ struct img_spdif_out *spdif = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(spdif->clk_ref);
+ if (ret) {
+ dev_err(dev, "clk_enable failed: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static inline void img_spdif_out_writel(struct img_spdif_out *spdif, u32 val,
+ u32 reg)
+{
+ writel(val, spdif->base + reg);
+}
+
+static inline u32 img_spdif_out_readl(struct img_spdif_out *spdif, u32 reg)
+{
+ return readl(spdif->base + reg);
+}
+
+static void img_spdif_out_reset(struct img_spdif_out *spdif)
+{
+ u32 ctl, status_low, status_high;
+
+ ctl = img_spdif_out_readl(spdif, IMG_SPDIF_OUT_CTL) &
+ ~IMG_SPDIF_OUT_CTL_SRT_MASK;
+ status_low = img_spdif_out_readl(spdif, IMG_SPDIF_OUT_CSL);
+ status_high = img_spdif_out_readl(spdif, IMG_SPDIF_OUT_CSH_UV);
+
+ reset_control_assert(spdif->rst);
+ reset_control_deassert(spdif->rst);
+
+ img_spdif_out_writel(spdif, ctl, IMG_SPDIF_OUT_CTL);
+ img_spdif_out_writel(spdif, status_low, IMG_SPDIF_OUT_CSL);
+ img_spdif_out_writel(spdif, status_high, IMG_SPDIF_OUT_CSH_UV);
+}
+
+static int img_spdif_out_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
+ uinfo->count = 1;
+
+ return 0;
+}
+
+static int img_spdif_out_get_status_mask(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ ucontrol->value.iec958.status[0] = 0xff;
+ ucontrol->value.iec958.status[1] = 0xff;
+ ucontrol->value.iec958.status[2] = 0xff;
+ ucontrol->value.iec958.status[3] = 0xff;
+ ucontrol->value.iec958.status[4] = 0xff;
+
+ return 0;
+}
+
+static int img_spdif_out_get_status(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct img_spdif_out *spdif = snd_soc_dai_get_drvdata(cpu_dai);
+ u32 reg;
+ unsigned long flags;
+
+ spin_lock_irqsave(&spdif->lock, flags);
+
+ reg = img_spdif_out_readl(spdif, IMG_SPDIF_OUT_CSL);
+ ucontrol->value.iec958.status[0] = reg & 0xff;
+ ucontrol->value.iec958.status[1] = (reg >> 8) & 0xff;
+ ucontrol->value.iec958.status[2] = (reg >> 16) & 0xff;
+ ucontrol->value.iec958.status[3] = (reg >> 24) & 0xff;
+
+ reg = img_spdif_out_readl(spdif, IMG_SPDIF_OUT_CSH_UV);
+ ucontrol->value.iec958.status[4] =
+ (reg & IMG_SPDIF_OUT_CSH_UV_CSH_MASK) >>
+ IMG_SPDIF_OUT_CSH_UV_CSH_SHIFT;
+
+ spin_unlock_irqrestore(&spdif->lock, flags);
+
+ return 0;
+}
+
+static int img_spdif_out_set_status(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct img_spdif_out *spdif = snd_soc_dai_get_drvdata(cpu_dai);
+ u32 reg;
+ unsigned long flags;
+
+ reg = ((u32)ucontrol->value.iec958.status[3] << 24);
+ reg |= ((u32)ucontrol->value.iec958.status[2] << 16);
+ reg |= ((u32)ucontrol->value.iec958.status[1] << 8);
+ reg |= (u32)ucontrol->value.iec958.status[0];
+
+ spin_lock_irqsave(&spdif->lock, flags);
+
+ img_spdif_out_writel(spdif, reg, IMG_SPDIF_OUT_CSL);
+
+ reg = img_spdif_out_readl(spdif, IMG_SPDIF_OUT_CSH_UV);
+ reg &= ~IMG_SPDIF_OUT_CSH_UV_CSH_MASK;
+ reg |= (u32)ucontrol->value.iec958.status[4] <<
+ IMG_SPDIF_OUT_CSH_UV_CSH_SHIFT;
+ img_spdif_out_writel(spdif, reg, IMG_SPDIF_OUT_CSH_UV);
+
+ spin_unlock_irqrestore(&spdif->lock, flags);
+
+ return 0;
+}
+
+static struct snd_kcontrol_new img_spdif_out_controls[] = {
+ {
+ .access = SNDRV_CTL_ELEM_ACCESS_READ,
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
+ .info = img_spdif_out_info,
+ .get = img_spdif_out_get_status_mask
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
+ .info = img_spdif_out_info,
+ .get = img_spdif_out_get_status,
+ .put = img_spdif_out_set_status
+ }
+};
+
+static int img_spdif_out_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct img_spdif_out *spdif = snd_soc_dai_get_drvdata(dai);
+ u32 reg;
+ unsigned long flags;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ reg = img_spdif_out_readl(spdif, IMG_SPDIF_OUT_CTL);
+ reg |= IMG_SPDIF_OUT_CTL_SRT_MASK;
+ img_spdif_out_writel(spdif, reg, IMG_SPDIF_OUT_CTL);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ spin_lock_irqsave(&spdif->lock, flags);
+ img_spdif_out_reset(spdif);
+ spin_unlock_irqrestore(&spdif->lock, flags);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int img_spdif_out_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+ struct img_spdif_out *spdif = snd_soc_dai_get_drvdata(dai);
+ unsigned int channels;
+ long pre_div_a, pre_div_b, diff_a, diff_b, rate, clk_rate;
+ u32 reg;
+ snd_pcm_format_t format;
+
+ rate = params_rate(params);
+ format = params_format(params);
+ channels = params_channels(params);
+
+ dev_dbg(spdif->dev, "hw_params rate %ld channels %u format %u\n",
+ rate, channels, format);
+
+ if (format != SNDRV_PCM_FORMAT_S32_LE)
+ return -EINVAL;
+
+ if (channels != 2)
+ return -EINVAL;
+
+ pre_div_a = clk_round_rate(spdif->clk_ref, rate * 256);
+ if (pre_div_a < 0)
+ return pre_div_a;
+ pre_div_b = clk_round_rate(spdif->clk_ref, rate * 384);
+ if (pre_div_b < 0)
+ return pre_div_b;
+
+ diff_a = abs((pre_div_a / 256) - rate);
+ diff_b = abs((pre_div_b / 384) - rate);
+
+ /* If diffs are equal, use lower clock rate */
+ if (diff_a > diff_b)
+ clk_set_rate(spdif->clk_ref, pre_div_b);
+ else
+ clk_set_rate(spdif->clk_ref, pre_div_a);
+
+ /*
+ * Another driver (eg machine driver) may have rejected the above
+ * change. Get the current rate and set the register bit according to
+ * the new min diff
+ */
+ clk_rate = clk_get_rate(spdif->clk_ref);
+
+ diff_a = abs((clk_rate / 256) - rate);
+ diff_b = abs((clk_rate / 384) - rate);
+
+ reg = img_spdif_out_readl(spdif, IMG_SPDIF_OUT_CTL);
+ if (diff_a <= diff_b)
+ reg &= ~IMG_SPDIF_OUT_CTL_CLK_MASK;
+ else
+ reg |= IMG_SPDIF_OUT_CTL_CLK_MASK;
+ img_spdif_out_writel(spdif, reg, IMG_SPDIF_OUT_CTL);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops img_spdif_out_dai_ops = {
+ .trigger = img_spdif_out_trigger,
+ .hw_params = img_spdif_out_hw_params
+};
+
+static int img_spdif_out_dai_probe(struct snd_soc_dai *dai)
+{
+ struct img_spdif_out *spdif = snd_soc_dai_get_drvdata(dai);
+
+ snd_soc_dai_init_dma_data(dai, &spdif->dma_data, NULL);
+
+ snd_soc_add_dai_controls(dai, img_spdif_out_controls,
+ ARRAY_SIZE(img_spdif_out_controls));
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver img_spdif_out_dai = {
+ .probe = img_spdif_out_dai_probe,
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE
+ },
+ .ops = &img_spdif_out_dai_ops
+};
+
+static const struct snd_soc_component_driver img_spdif_out_component = {
+ .name = "img-spdif-out"
+};
+
+static int img_spdif_out_probe(struct platform_device *pdev)
+{
+ struct img_spdif_out *spdif;
+ struct resource *res;
+ void __iomem *base;
+ int ret;
+ struct device *dev = &pdev->dev;
+
+ spdif = devm_kzalloc(&pdev->dev, sizeof(*spdif), GFP_KERNEL);
+ if (!spdif)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, spdif);
+
+ spdif->dev = &pdev->dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ spdif->base = base;
+
+ spdif->rst = devm_reset_control_get(&pdev->dev, "rst");
+ if (IS_ERR(spdif->rst)) {
+ if (PTR_ERR(spdif->rst) != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "No top level reset found\n");
+ return PTR_ERR(spdif->rst);
+ }
+
+ spdif->clk_sys = devm_clk_get(&pdev->dev, "sys");
+ if (IS_ERR(spdif->clk_sys)) {
+ if (PTR_ERR(spdif->clk_sys) != -EPROBE_DEFER)
+ dev_err(dev, "Failed to acquire clock 'sys'\n");
+ return PTR_ERR(spdif->clk_sys);
+ }
+
+ spdif->clk_ref = devm_clk_get(&pdev->dev, "ref");
+ if (IS_ERR(spdif->clk_ref)) {
+ if (PTR_ERR(spdif->clk_ref) != -EPROBE_DEFER)
+ dev_err(dev, "Failed to acquire clock 'ref'\n");
+ return PTR_ERR(spdif->clk_ref);
+ }
+
+ ret = clk_prepare_enable(spdif->clk_sys);
+ if (ret)
+ return ret;
+
+ img_spdif_out_writel(spdif, IMG_SPDIF_OUT_CTL_FS_MASK,
+ IMG_SPDIF_OUT_CTL);
+
+ img_spdif_out_reset(spdif);
+
+ pm_runtime_enable(&pdev->dev);
+ if (!pm_runtime_enabled(&pdev->dev)) {
+ ret = img_spdif_out_resume(&pdev->dev);
+ if (ret)
+ goto err_pm_disable;
+ }
+
+ spin_lock_init(&spdif->lock);
+
+ spdif->dma_data.addr = res->start + IMG_SPDIF_OUT_TX_FIFO;
+ spdif->dma_data.addr_width = 4;
+ spdif->dma_data.maxburst = 4;
+
+ ret = devm_snd_soc_register_component(&pdev->dev,
+ &img_spdif_out_component,
+ &img_spdif_out_dai, 1);
+ if (ret)
+ goto err_suspend;
+
+ ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
+ if (ret)
+ goto err_suspend;
+
+ dev_dbg(&pdev->dev, "Probe successful\n");
+
+ return 0;
+
+err_suspend:
+ if (!pm_runtime_status_suspended(&pdev->dev))
+ img_spdif_out_suspend(&pdev->dev);
+err_pm_disable:
+ pm_runtime_disable(&pdev->dev);
+ clk_disable_unprepare(spdif->clk_sys);
+
+ return ret;
+}
+
+static int img_spdif_out_dev_remove(struct platform_device *pdev)
+{
+ struct img_spdif_out *spdif = platform_get_drvdata(pdev);
+
+ pm_runtime_disable(&pdev->dev);
+ if (!pm_runtime_status_suspended(&pdev->dev))
+ img_spdif_out_suspend(&pdev->dev);
+
+ clk_disable_unprepare(spdif->clk_sys);
+
+ return 0;
+}
+
+static const struct of_device_id img_spdif_out_of_match[] = {
+ { .compatible = "img,spdif-out" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, img_spdif_out_of_match);
+
+static const struct dev_pm_ops img_spdif_out_pm_ops = {
+ SET_RUNTIME_PM_OPS(img_spdif_out_suspend,
+ img_spdif_out_resume, NULL)
+};
+
+static struct platform_driver img_spdif_out_driver = {
+ .driver = {
+ .name = "img-spdif-out",
+ .of_match_table = img_spdif_out_of_match,
+ .pm = &img_spdif_out_pm_ops
+ },
+ .probe = img_spdif_out_probe,
+ .remove = img_spdif_out_dev_remove
+};
+module_platform_driver(img_spdif_out_driver);
+
+MODULE_AUTHOR("Damien Horsley <Damien.Horsley at imgtec.com>");
+MODULE_DESCRIPTION("IMG SPDIF Output driver");
+MODULE_LICENSE("GPL v2");
--
2.6.1
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