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Diffstat (limited to 'sound/soc/samsung/s3c24xx-i2s.c')
-rw-r--r--sound/soc/samsung/s3c24xx-i2s.c463
1 files changed, 0 insertions, 463 deletions
diff --git a/sound/soc/samsung/s3c24xx-i2s.c b/sound/soc/samsung/s3c24xx-i2s.c
deleted file mode 100644
index 7b7bbe007acd..000000000000
--- a/sound/soc/samsung/s3c24xx-i2s.c
+++ /dev/null
@@ -1,463 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-//
-// s3c24xx-i2s.c -- ALSA Soc Audio Layer
-//
-// (c) 2006 Wolfson Microelectronics PLC.
-// Graeme Gregory graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
-//
-// Copyright 2004-2005 Simtec Electronics
-// http://armlinux.simtec.co.uk/
-// Ben Dooks <ben@simtec.co.uk>
-
-#include <linux/delay.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/module.h>
-
-#include <sound/soc.h>
-#include <sound/pcm_params.h>
-
-#include "regs-iis.h"
-#include "dma.h"
-#include "s3c24xx-i2s.h"
-
-static struct snd_dmaengine_dai_dma_data s3c24xx_i2s_pcm_stereo_out = {
- .chan_name = "tx",
- .addr_width = 2,
-};
-
-static struct snd_dmaengine_dai_dma_data s3c24xx_i2s_pcm_stereo_in = {
- .chan_name = "rx",
- .addr_width = 2,
-};
-
-struct s3c24xx_i2s_info {
- void __iomem *regs;
- struct clk *iis_clk;
- u32 iiscon;
- u32 iismod;
- u32 iisfcon;
- u32 iispsr;
-};
-static struct s3c24xx_i2s_info s3c24xx_i2s;
-
-static void s3c24xx_snd_txctrl(int on)
-{
- u32 iisfcon;
- u32 iiscon;
- u32 iismod;
-
- iisfcon = readl(s3c24xx_i2s.regs + S3C2410_IISFCON);
- iiscon = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
- iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
-
- pr_debug("r: IISCON: %x IISMOD: %x IISFCON: %x\n", iiscon, iismod, iisfcon);
-
- if (on) {
- iisfcon |= S3C2410_IISFCON_TXDMA | S3C2410_IISFCON_TXENABLE;
- iiscon |= S3C2410_IISCON_TXDMAEN | S3C2410_IISCON_IISEN;
- iiscon &= ~S3C2410_IISCON_TXIDLE;
- iismod |= S3C2410_IISMOD_TXMODE;
-
- writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
- writel(iisfcon, s3c24xx_i2s.regs + S3C2410_IISFCON);
- writel(iiscon, s3c24xx_i2s.regs + S3C2410_IISCON);
- } else {
- /* note, we have to disable the FIFOs otherwise bad things
- * seem to happen when the DMA stops. According to the
- * Samsung supplied kernel, this should allow the DMA
- * engine and FIFOs to reset. If this isn't allowed, the
- * DMA engine will simply freeze randomly.
- */
-
- iisfcon &= ~S3C2410_IISFCON_TXENABLE;
- iisfcon &= ~S3C2410_IISFCON_TXDMA;
- iiscon |= S3C2410_IISCON_TXIDLE;
- iiscon &= ~S3C2410_IISCON_TXDMAEN;
- iismod &= ~S3C2410_IISMOD_TXMODE;
-
- writel(iiscon, s3c24xx_i2s.regs + S3C2410_IISCON);
- writel(iisfcon, s3c24xx_i2s.regs + S3C2410_IISFCON);
- writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
- }
-
- pr_debug("w: IISCON: %x IISMOD: %x IISFCON: %x\n", iiscon, iismod, iisfcon);
-}
-
-static void s3c24xx_snd_rxctrl(int on)
-{
- u32 iisfcon;
- u32 iiscon;
- u32 iismod;
-
- iisfcon = readl(s3c24xx_i2s.regs + S3C2410_IISFCON);
- iiscon = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
- iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
-
- pr_debug("r: IISCON: %x IISMOD: %x IISFCON: %x\n", iiscon, iismod, iisfcon);
-
- if (on) {
- iisfcon |= S3C2410_IISFCON_RXDMA | S3C2410_IISFCON_RXENABLE;
- iiscon |= S3C2410_IISCON_RXDMAEN | S3C2410_IISCON_IISEN;
- iiscon &= ~S3C2410_IISCON_RXIDLE;
- iismod |= S3C2410_IISMOD_RXMODE;
-
- writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
- writel(iisfcon, s3c24xx_i2s.regs + S3C2410_IISFCON);
- writel(iiscon, s3c24xx_i2s.regs + S3C2410_IISCON);
- } else {
- /* note, we have to disable the FIFOs otherwise bad things
- * seem to happen when the DMA stops. According to the
- * Samsung supplied kernel, this should allow the DMA
- * engine and FIFOs to reset. If this isn't allowed, the
- * DMA engine will simply freeze randomly.
- */
-
- iisfcon &= ~S3C2410_IISFCON_RXENABLE;
- iisfcon &= ~S3C2410_IISFCON_RXDMA;
- iiscon |= S3C2410_IISCON_RXIDLE;
- iiscon &= ~S3C2410_IISCON_RXDMAEN;
- iismod &= ~S3C2410_IISMOD_RXMODE;
-
- writel(iisfcon, s3c24xx_i2s.regs + S3C2410_IISFCON);
- writel(iiscon, s3c24xx_i2s.regs + S3C2410_IISCON);
- writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
- }
-
- pr_debug("w: IISCON: %x IISMOD: %x IISFCON: %x\n", iiscon, iismod, iisfcon);
-}
-
-/*
- * Wait for the LR signal to allow synchronisation to the L/R clock
- * from the codec. May only be needed for slave mode.
- */
-static int s3c24xx_snd_lrsync(void)
-{
- u32 iiscon;
- int timeout = 50; /* 5ms */
-
- while (1) {
- iiscon = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
- if (iiscon & S3C2410_IISCON_LRINDEX)
- break;
-
- if (!timeout--)
- return -ETIMEDOUT;
- udelay(100);
- }
-
- return 0;
-}
-
-/*
- * Check whether CPU is the master or slave
- */
-static inline int s3c24xx_snd_is_clkmaster(void)
-{
- return (readl(s3c24xx_i2s.regs + S3C2410_IISMOD) & S3C2410_IISMOD_SLAVE) ? 0:1;
-}
-
-/*
- * Set S3C24xx I2S DAI format
- */
-static int s3c24xx_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
- unsigned int fmt)
-{
- u32 iismod;
-
- iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
- pr_debug("hw_params r: IISMOD: %x \n", iismod);
-
- switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
- case SND_SOC_DAIFMT_BC_FC:
- iismod |= S3C2410_IISMOD_SLAVE;
- break;
- case SND_SOC_DAIFMT_BP_FP:
- iismod &= ~S3C2410_IISMOD_SLAVE;
- break;
- default:
- return -EINVAL;
- }
-
- switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
- case SND_SOC_DAIFMT_LEFT_J:
- iismod |= S3C2410_IISMOD_MSB;
- break;
- case SND_SOC_DAIFMT_I2S:
- iismod &= ~S3C2410_IISMOD_MSB;
- break;
- default:
- return -EINVAL;
- }
-
- writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
- pr_debug("hw_params w: IISMOD: %x \n", iismod);
-
- return 0;
-}
-
-static int s3c24xx_i2s_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params,
- struct snd_soc_dai *dai)
-{
- struct snd_dmaengine_dai_dma_data *dma_data;
- u32 iismod;
-
- dma_data = snd_soc_dai_get_dma_data(dai, substream);
-
- /* Working copies of register */
- iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
- pr_debug("hw_params r: IISMOD: %x\n", iismod);
-
- switch (params_width(params)) {
- case 8:
- iismod &= ~S3C2410_IISMOD_16BIT;
- dma_data->addr_width = 1;
- break;
- case 16:
- iismod |= S3C2410_IISMOD_16BIT;
- dma_data->addr_width = 2;
- break;
- default:
- return -EINVAL;
- }
-
- writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
- pr_debug("hw_params w: IISMOD: %x\n", iismod);
-
- return 0;
-}
-
-static int s3c24xx_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
- struct snd_soc_dai *dai)
-{
- int ret = 0;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_RESUME:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- if (!s3c24xx_snd_is_clkmaster()) {
- ret = s3c24xx_snd_lrsync();
- if (ret)
- goto exit_err;
- }
-
- if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
- s3c24xx_snd_rxctrl(1);
- else
- s3c24xx_snd_txctrl(1);
-
- break;
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
- s3c24xx_snd_rxctrl(0);
- else
- s3c24xx_snd_txctrl(0);
- break;
- default:
- ret = -EINVAL;
- break;
- }
-
-exit_err:
- return ret;
-}
-
-/*
- * Set S3C24xx Clock source
- */
-static int s3c24xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
- int clk_id, unsigned int freq, int dir)
-{
- u32 iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
-
- iismod &= ~S3C2440_IISMOD_MPLL;
-
- switch (clk_id) {
- case S3C24XX_CLKSRC_PCLK:
- break;
- case S3C24XX_CLKSRC_MPLL:
- iismod |= S3C2440_IISMOD_MPLL;
- break;
- default:
- return -EINVAL;
- }
-
- writel(iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
- return 0;
-}
-
-/*
- * Set S3C24xx Clock dividers
- */
-static int s3c24xx_i2s_set_clkdiv(struct snd_soc_dai *cpu_dai,
- int div_id, int div)
-{
- u32 reg;
-
- switch (div_id) {
- case S3C24XX_DIV_BCLK:
- reg = readl(s3c24xx_i2s.regs + S3C2410_IISMOD) & ~S3C2410_IISMOD_FS_MASK;
- writel(reg | div, s3c24xx_i2s.regs + S3C2410_IISMOD);
- break;
- case S3C24XX_DIV_MCLK:
- reg = readl(s3c24xx_i2s.regs + S3C2410_IISMOD) & ~(S3C2410_IISMOD_384FS);
- writel(reg | div, s3c24xx_i2s.regs + S3C2410_IISMOD);
- break;
- case S3C24XX_DIV_PRESCALER:
- writel(div, s3c24xx_i2s.regs + S3C2410_IISPSR);
- reg = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
- writel(reg | S3C2410_IISCON_PSCEN, s3c24xx_i2s.regs + S3C2410_IISCON);
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-/*
- * To avoid duplicating clock code, allow machine driver to
- * get the clockrate from here.
- */
-u32 s3c24xx_i2s_get_clockrate(void)
-{
- return clk_get_rate(s3c24xx_i2s.iis_clk);
-}
-EXPORT_SYMBOL_GPL(s3c24xx_i2s_get_clockrate);
-
-static int s3c24xx_i2s_probe(struct snd_soc_dai *dai)
-{
- int ret;
- snd_soc_dai_init_dma_data(dai, &s3c24xx_i2s_pcm_stereo_out,
- &s3c24xx_i2s_pcm_stereo_in);
-
- s3c24xx_i2s.iis_clk = devm_clk_get(dai->dev, "iis");
- if (IS_ERR(s3c24xx_i2s.iis_clk)) {
- pr_err("failed to get iis_clock\n");
- return PTR_ERR(s3c24xx_i2s.iis_clk);
- }
- ret = clk_prepare_enable(s3c24xx_i2s.iis_clk);
- if (ret)
- return ret;
-
- writel(S3C2410_IISCON_IISEN, s3c24xx_i2s.regs + S3C2410_IISCON);
-
- s3c24xx_snd_txctrl(0);
- s3c24xx_snd_rxctrl(0);
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int s3c24xx_i2s_suspend(struct snd_soc_component *component)
-{
- s3c24xx_i2s.iiscon = readl(s3c24xx_i2s.regs + S3C2410_IISCON);
- s3c24xx_i2s.iismod = readl(s3c24xx_i2s.regs + S3C2410_IISMOD);
- s3c24xx_i2s.iisfcon = readl(s3c24xx_i2s.regs + S3C2410_IISFCON);
- s3c24xx_i2s.iispsr = readl(s3c24xx_i2s.regs + S3C2410_IISPSR);
-
- clk_disable_unprepare(s3c24xx_i2s.iis_clk);
-
- return 0;
-}
-
-static int s3c24xx_i2s_resume(struct snd_soc_component *component)
-{
- int ret;
-
- ret = clk_prepare_enable(s3c24xx_i2s.iis_clk);
- if (ret)
- return ret;
-
- writel(s3c24xx_i2s.iiscon, s3c24xx_i2s.regs + S3C2410_IISCON);
- writel(s3c24xx_i2s.iismod, s3c24xx_i2s.regs + S3C2410_IISMOD);
- writel(s3c24xx_i2s.iisfcon, s3c24xx_i2s.regs + S3C2410_IISFCON);
- writel(s3c24xx_i2s.iispsr, s3c24xx_i2s.regs + S3C2410_IISPSR);
-
- return 0;
-}
-#else
-#define s3c24xx_i2s_suspend NULL
-#define s3c24xx_i2s_resume NULL
-#endif
-
-#define S3C24XX_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 s3c24xx_i2s_dai_ops = {
- .trigger = s3c24xx_i2s_trigger,
- .hw_params = s3c24xx_i2s_hw_params,
- .set_fmt = s3c24xx_i2s_set_fmt,
- .set_clkdiv = s3c24xx_i2s_set_clkdiv,
- .set_sysclk = s3c24xx_i2s_set_sysclk,
-};
-
-static struct snd_soc_dai_driver s3c24xx_i2s_dai = {
- .probe = s3c24xx_i2s_probe,
- .playback = {
- .channels_min = 2,
- .channels_max = 2,
- .rates = S3C24XX_I2S_RATES,
- .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,},
- .capture = {
- .channels_min = 2,
- .channels_max = 2,
- .rates = S3C24XX_I2S_RATES,
- .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,},
- .ops = &s3c24xx_i2s_dai_ops,
-};
-
-static const struct snd_soc_component_driver s3c24xx_i2s_component = {
- .name = "s3c24xx-i2s",
- .suspend = s3c24xx_i2s_suspend,
- .resume = s3c24xx_i2s_resume,
- .legacy_dai_naming = 1,
-};
-
-static int s3c24xx_iis_dev_probe(struct platform_device *pdev)
-{
- struct resource *res;
- int ret;
-
- s3c24xx_i2s.regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
- if (IS_ERR(s3c24xx_i2s.regs))
- return PTR_ERR(s3c24xx_i2s.regs);
-
- s3c24xx_i2s_pcm_stereo_out.addr = res->start + S3C2410_IISFIFO;
- s3c24xx_i2s_pcm_stereo_in.addr = res->start + S3C2410_IISFIFO;
-
- ret = samsung_asoc_dma_platform_register(&pdev->dev, NULL,
- "tx", "rx", NULL);
- if (ret) {
- dev_err(&pdev->dev, "Failed to register the DMA: %d\n", ret);
- return ret;
- }
-
- ret = devm_snd_soc_register_component(&pdev->dev,
- &s3c24xx_i2s_component, &s3c24xx_i2s_dai, 1);
- if (ret)
- dev_err(&pdev->dev, "Failed to register the DAI\n");
-
- return ret;
-}
-
-static struct platform_driver s3c24xx_iis_driver = {
- .probe = s3c24xx_iis_dev_probe,
- .driver = {
- .name = "s3c24xx-iis",
- },
-};
-
-module_platform_driver(s3c24xx_iis_driver);
-
-/* Module information */
-MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
-MODULE_DESCRIPTION("s3c24xx I2S SoC Interface");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:s3c24xx-iis");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 06:29:48 +0100