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-rw-r--r--sound/soc/samsung/s3c2412-i2s.c251
1 files changed, 251 insertions, 0 deletions
diff --git a/sound/soc/samsung/s3c2412-i2s.c b/sound/soc/samsung/s3c2412-i2s.c
new file mode 100644
index 000000000..0579a3529
--- /dev/null
+++ b/sound/soc/samsung/s3c2412-i2s.c
@@ -0,0 +1,251 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// ALSA Soc Audio Layer - S3C2412 I2S driver
+//
+// Copyright (c) 2006 Wolfson Microelectronics PLC.
+// Graeme Gregory graeme.gregory@wolfsonmicro.com
+// linux@wolfsonmicro.com
+//
+// Copyright (c) 2007, 2004-2005 Simtec Electronics
+// http://armlinux.simtec.co.uk/
+// Ben Dooks <ben@simtec.co.uk>
+
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+
+#include "dma.h"
+#include "regs-i2s-v2.h"
+#include "s3c2412-i2s.h"
+
+#include <linux/platform_data/asoc-s3c.h>
+
+static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_out = {
+ .chan_name = "tx",
+ .addr_width = 4,
+};
+
+static struct snd_dmaengine_dai_dma_data s3c2412_i2s_pcm_stereo_in = {
+ .chan_name = "rx",
+ .addr_width = 4,
+};
+
+static struct s3c_i2sv2_info s3c2412_i2s;
+
+static int s3c2412_i2s_probe(struct snd_soc_dai *dai)
+{
+ int ret;
+
+ pr_debug("Entered %s\n", __func__);
+
+ snd_soc_dai_init_dma_data(dai, &s3c2412_i2s_pcm_stereo_out,
+ &s3c2412_i2s_pcm_stereo_in);
+
+ ret = s3c_i2sv2_probe(dai, &s3c2412_i2s);
+ if (ret)
+ return ret;
+
+ s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in;
+ s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out;
+
+ s3c2412_i2s.iis_cclk = devm_clk_get(dai->dev, "i2sclk");
+ if (IS_ERR(s3c2412_i2s.iis_cclk)) {
+ pr_err("failed to get i2sclk clock\n");
+ ret = PTR_ERR(s3c2412_i2s.iis_cclk);
+ goto err;
+ }
+
+ /* Set MPLL as the source for IIS CLK */
+
+ clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
+ ret = clk_prepare_enable(s3c2412_i2s.iis_cclk);
+ if (ret)
+ goto err;
+
+ return 0;
+
+err:
+ s3c_i2sv2_cleanup(dai, &s3c2412_i2s);
+
+ return ret;
+}
+
+static int s3c2412_i2s_remove(struct snd_soc_dai *dai)
+{
+ clk_disable_unprepare(s3c2412_i2s.iis_cclk);
+ s3c_i2sv2_cleanup(dai, &s3c2412_i2s);
+
+ return 0;
+}
+
+static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
+ u32 iismod;
+
+ pr_debug("Entered %s\n", __func__);
+
+ iismod = readl(i2s->regs + S3C2412_IISMOD);
+ pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);
+
+ switch (params_width(params)) {
+ case 8:
+ iismod |= S3C2412_IISMOD_8BIT;
+ break;
+ case 16:
+ iismod &= ~S3C2412_IISMOD_8BIT;
+ break;
+ }
+
+ writel(iismod, i2s->regs + S3C2412_IISMOD);
+ pr_debug("%s: w: IISMOD: %x\n", __func__, iismod);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int s3c2412_i2s_suspend(struct snd_soc_component *component)
+{
+ struct s3c_i2sv2_info *i2s = snd_soc_component_get_drvdata(component);
+ u32 iismod;
+
+ if (component->active) {
+ i2s->suspend_iismod = readl(i2s->regs + S3C2412_IISMOD);
+ i2s->suspend_iiscon = readl(i2s->regs + S3C2412_IISCON);
+ i2s->suspend_iispsr = readl(i2s->regs + S3C2412_IISPSR);
+
+ /* some basic suspend checks */
+
+ iismod = readl(i2s->regs + S3C2412_IISMOD);
+
+ if (iismod & S3C2412_IISCON_RXDMA_ACTIVE)
+ pr_warn("%s: RXDMA active?\n", __func__);
+
+ if (iismod & S3C2412_IISCON_TXDMA_ACTIVE)
+ pr_warn("%s: TXDMA active?\n", __func__);
+
+ if (iismod & S3C2412_IISCON_IIS_ACTIVE)
+ pr_warn("%s: IIS active\n", __func__);
+ }
+
+ return 0;
+}
+
+static int s3c2412_i2s_resume(struct snd_soc_component *component)
+{
+ struct s3c_i2sv2_info *i2s = snd_soc_component_get_drvdata(component);
+
+ pr_info("component_active %d, IISMOD %08x, IISCON %08x\n",
+ component->active, i2s->suspend_iismod, i2s->suspend_iiscon);
+
+ if (component->active) {
+ writel(i2s->suspend_iiscon, i2s->regs + S3C2412_IISCON);
+ writel(i2s->suspend_iismod, i2s->regs + S3C2412_IISMOD);
+ writel(i2s->suspend_iispsr, i2s->regs + S3C2412_IISPSR);
+
+ writel(S3C2412_IISFIC_RXFLUSH | S3C2412_IISFIC_TXFLUSH,
+ i2s->regs + S3C2412_IISFIC);
+
+ ndelay(250);
+ writel(0x0, i2s->regs + S3C2412_IISFIC);
+ }
+
+ return 0;
+}
+#else
+#define s3c2412_i2s_suspend NULL
+#define s3c2412_i2s_resume NULL
+#endif
+
+#define S3C2412_I2S_RATES \
+ (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
+ SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
+ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
+
+static const struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
+ .hw_params = s3c2412_i2s_hw_params,
+};
+
+static struct snd_soc_dai_driver s3c2412_i2s_dai = {
+ .probe = s3c2412_i2s_probe,
+ .remove = s3c2412_i2s_remove,
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = S3C2412_I2S_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
+ },
+ .capture = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = S3C2412_I2S_RATES,
+ .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
+ },
+ .ops = &s3c2412_i2s_dai_ops,
+};
+
+static const struct snd_soc_component_driver s3c2412_i2s_component = {
+ .name = "s3c2412-i2s",
+ .suspend = s3c2412_i2s_suspend,
+ .resume = s3c2412_i2s_resume,
+ .legacy_dai_naming = 1,
+};
+
+static int s3c2412_iis_dev_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct resource *res;
+ struct s3c_audio_pdata *pdata = dev_get_platdata(&pdev->dev);
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "missing platform data");
+ return -ENXIO;
+ }
+
+ s3c2412_i2s.regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+ if (IS_ERR(s3c2412_i2s.regs))
+ return PTR_ERR(s3c2412_i2s.regs);
+
+ s3c2412_i2s_pcm_stereo_out.addr = res->start + S3C2412_IISTXD;
+ s3c2412_i2s_pcm_stereo_out.filter_data = pdata->dma_playback;
+ s3c2412_i2s_pcm_stereo_in.addr = res->start + S3C2412_IISRXD;
+ s3c2412_i2s_pcm_stereo_in.filter_data = pdata->dma_capture;
+
+ ret = samsung_asoc_dma_platform_register(&pdev->dev,
+ pdata->dma_filter,
+ "tx", "rx", NULL);
+ if (ret) {
+ pr_err("failed to register the DMA: %d\n", ret);
+ return ret;
+ }
+
+ ret = s3c_i2sv2_register_component(&pdev->dev, -1,
+ &s3c2412_i2s_component,
+ &s3c2412_i2s_dai);
+ if (ret)
+ pr_err("failed to register the dai\n");
+
+ return ret;
+}
+
+static struct platform_driver s3c2412_iis_driver = {
+ .probe = s3c2412_iis_dev_probe,
+ .driver = {
+ .name = "s3c2412-iis",
+ },
+};
+
+module_platform_driver(s3c2412_iis_driver);
+
+/* Module information */
+MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
+MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:s3c2412-iis");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 20:07:07 +0000