From 1f93a7dfd1f8d5ff7a5c53246c7534fe2332d6f4 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 02:46:07 +0000
Subject: [PATCH] add audio
---
kernel/sound/soc/fsl/fsl_ssi.c | 97 +++++++++++++++++++++++++++---------------------
1 files changed, 55 insertions(+), 42 deletions(-)
diff --git a/kernel/sound/soc/fsl/fsl_ssi.c b/kernel/sound/soc/fsl/fsl_ssi.c
index d6a1573..1d774c8 100644
--- a/kernel/sound/soc/fsl/fsl_ssi.c
+++ b/kernel/sound/soc/fsl/fsl_ssi.c
@@ -203,12 +203,10 @@
};
/**
- * fsl_ssi: per-SSI private data
- *
+ * struct fsl_ssi - per-SSI private data
* @regs: Pointer to the regmap registers
* @irq: IRQ of this SSI
* @cpu_dai_drv: CPU DAI driver for this device
- *
* @dai_fmt: DAI configuration this device is currently used with
* @streams: Mask of current active streams: BIT(TX) and BIT(RX)
* @i2s_net: I2S and Network mode configurations of SCR register
@@ -221,38 +219,29 @@
* @slot_width: Width of each DAI slot
* @slots: Number of slots
* @regvals: Specific RX/TX register settings
- *
* @clk: Clock source to access register
* @baudclk: Clock source to generate bit and frame-sync clocks
* @baudclk_streams: Active streams that are using baudclk
- *
* @regcache_sfcsr: Cache sfcsr register value during suspend and resume
* @regcache_sacnt: Cache sacnt register value during suspend and resume
- *
* @dma_params_tx: DMA transmit parameters
* @dma_params_rx: DMA receive parameters
* @ssi_phys: physical address of the SSI registers
- *
* @fiq_params: FIQ stream filtering parameters
- *
* @card_pdev: Platform_device pointer to register a sound card for PowerPC or
* to register a CODEC platform device for AC97
* @card_name: Platform_device name to register a sound card for PowerPC or
* to register a CODEC platform device for AC97
* @card_idx: The index of SSI to register a sound card for PowerPC or
* to register a CODEC platform device for AC97
- *
* @dbg_stats: Debugging statistics
- *
* @soc: SoC specific data
* @dev: Pointer to &pdev->dev
- *
* @fifo_watermark: The FIFO watermark setting. Notifies DMA when there are
* @fifo_watermark or fewer words in TX fifo or
* @fifo_watermark or more empty words in RX fifo.
* @dma_maxburst: Max number of words to transfer in one go. So far,
* this is always the same as fifo_watermark.
- *
* @ac97_reg_lock: Mutex lock to serialize AC97 register access operations
*/
struct fsl_ssi {
@@ -374,7 +363,9 @@
}
/**
- * Interrupt handler to gather states
+ * fsl_ssi_irq - Interrupt handler to gather states
+ * @irq: irq number
+ * @dev_id: context
*/
static irqreturn_t fsl_ssi_isr(int irq, void *dev_id)
{
@@ -395,7 +386,10 @@
}
/**
- * Set SCR, SIER, STCR and SRCR registers with cached values in regvals
+ * fsl_ssi_config_enable - Set SCR, SIER, STCR and SRCR registers with
+ * cached values in regvals
+ * @ssi: SSI context
+ * @tx: direction
*
* Notes:
* 1) For offline_config SoCs, enable all necessary bits of both streams
@@ -474,7 +468,7 @@
ssi->streams |= BIT(dir);
}
-/**
+/*
* Exclude bits that are used by the opposite stream
*
* When both streams are active, disabling some bits for the current stream
@@ -495,7 +489,10 @@
((vals) & _ssi_xor_shared_bits(vals, avals, aactive))
/**
- * Unset SCR, SIER, STCR and SRCR registers with cached values in regvals
+ * fsl_ssi_config_disable - Unset SCR, SIER, STCR and SRCR registers
+ * with cached values in regvals
+ * @ssi: SSI context
+ * @tx: direction
*
* Notes:
* 1) For offline_config SoCs, to avoid online reconfigurations, disable all
@@ -577,7 +574,9 @@
}
/**
- * Cache critical bits of SIER, SRCR, STCR and SCR to later set them safely
+ * fsl_ssi_setup_regvals - Cache critical bits of SIER, SRCR, STCR and
+ * SCR to later set them safely
+ * @ssi: SSI context
*/
static void fsl_ssi_setup_regvals(struct fsl_ssi *ssi)
{
@@ -630,8 +629,8 @@
static int fsl_ssi_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(rtd->cpu_dai);
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
int ret;
ret = clk_prepare_enable(ssi->clk);
@@ -654,16 +653,19 @@
static void fsl_ssi_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(rtd->cpu_dai);
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
clk_disable_unprepare(ssi->clk);
}
/**
- * Configure Digital Audio Interface bit clock
+ * fsl_ssi_set_bclk - Configure Digital Audio Interface bit clock
+ * @substream: ASoC substream
+ * @dai: pointer to DAI
+ * @hw_params: pointers to hw_params
*
- * Note: This function can be only called when using SSI as DAI master
+ * Notes: This function can be only called when using SSI as DAI master
*
* Quick instruction for parameters:
* freq: Output BCLK frequency = samplerate * slots * slot_width
@@ -782,7 +784,10 @@
}
/**
- * Configure SSI based on PCM hardware parameters
+ * fsl_ssi_hw_params - Configure SSI based on PCM hardware parameters
+ * @substream: ASoC substream
+ * @hw_params: pointers to hw_params
+ * @dai: pointer to DAI
*
* Notes:
* 1) SxCCR.WL bits are critical bits that require SSI to be temporarily
@@ -858,8 +863,8 @@
static int fsl_ssi_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(rtd->cpu_dai);
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
if (fsl_ssi_is_i2s_master(ssi) &&
ssi->baudclk_streams & BIT(substream->stream)) {
@@ -894,7 +899,7 @@
"missing baudclk for master mode\n");
return -EINVAL;
}
- /* fall through */
+ fallthrough;
case SND_SOC_DAIFMT_CBM_CFS:
ssi->i2s_net |= SSI_SCR_I2S_MODE_MASTER;
break;
@@ -999,7 +1004,9 @@
}
/**
- * Configure Digital Audio Interface (DAI) Format
+ * fsl_ssi_set_dai_fmt - Configure Digital Audio Interface (DAI) Format
+ * @dai: pointer to DAI
+ * @fmt: format mask
*/
static int fsl_ssi_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
@@ -1013,7 +1020,12 @@
}
/**
- * Set TDM slot number and slot width
+ * fsl_ssi_set_dai_tdm_slot - Set TDM slot number and slot width
+ * @dai: pointer to DAI
+ * @tx_mask: mask for TX
+ * @rx_mask: mask for RX
+ * @slots: number of slots
+ * @slot_width: number of bits per slot
*/
static int fsl_ssi_set_dai_tdm_slot(struct snd_soc_dai *dai, u32 tx_mask,
u32 rx_mask, int slots, int slot_width)
@@ -1057,7 +1069,10 @@
}
/**
- * Start or stop SSI and corresponding DMA transaction.
+ * fsl_ssi_trigger - Start or stop SSI and corresponding DMA transaction.
+ * @substream: ASoC substream
+ * @cmd: trigger command
+ * @dai: pointer to DAI
*
* The DMA channel is in external master start and pause mode, which
* means the SSI completely controls the flow of data.
@@ -1065,8 +1080,8 @@
static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(rtd->cpu_dai);
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
switch (cmd) {
@@ -1143,7 +1158,6 @@
};
static struct snd_soc_dai_driver fsl_ssi_ac97_dai = {
- .bus_control = true,
.symmetric_channels = 1,
.probe = fsl_ssi_dai_probe,
.playback = {
@@ -1242,7 +1256,8 @@
};
/**
- * Initialize SSI registers
+ * fsl_ssi_hw_init - Initialize SSI registers
+ * @ssi: SSI context
*/
static int fsl_ssi_hw_init(struct fsl_ssi *ssi)
{
@@ -1271,7 +1286,8 @@
}
/**
- * Clear SSI registers
+ * fsl_ssi_hw_clean - Clear SSI registers
+ * @ssi: SSI context
*/
static void fsl_ssi_hw_clean(struct fsl_ssi *ssi)
{
@@ -1288,7 +1304,8 @@
regmap_update_bits(ssi->regs, REG_SSI_SCR, SSI_SCR_SSIEN, 0);
}
}
-/**
+
+/*
* Make every character in a string lower-case
*/
static void make_lowercase(char *s)
@@ -1517,10 +1534,8 @@
}
ssi->irq = platform_get_irq(pdev, 0);
- if (ssi->irq < 0) {
- dev_err(dev, "no irq for node %s\n", pdev->name);
+ if (ssi->irq < 0)
return ssi->irq;
- }
/* Set software limitations for synchronous mode except AC97 */
if (ssi->synchronous && !fsl_ssi_is_ac97(ssi)) {
@@ -1589,9 +1604,7 @@
}
}
- ret = fsl_ssi_debugfs_create(&ssi->dbg_stats, dev);
- if (ret)
- goto error_asoc_register;
+ fsl_ssi_debugfs_create(&ssi->dbg_stats, dev);
/* Initially configures SSI registers */
fsl_ssi_hw_init(ssi);
--
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