From 01573e231f18eb2d99162747186f59511f56b64d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 08 Dec 2023 10:40:48 +0000
Subject: [PATCH] 移去rt
---
kernel/sound/soc/codecs/pcm3168a.c | 269 ++++++++++++++++++++++++++++++++++++++++-------------
1 files changed, 202 insertions(+), 67 deletions(-)
diff --git a/kernel/sound/soc/codecs/pcm3168a.c b/kernel/sound/soc/codecs/pcm3168a.c
index 439e402..821e739 100644
--- a/kernel/sound/soc/codecs/pcm3168a.c
+++ b/kernel/sound/soc/codecs/pcm3168a.c
@@ -1,18 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* PCM3168A codec driver
*
* Copyright (C) 2015 Imagination Technologies Ltd.
*
* Author: Damien Horsley <Damien.Horsley@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/delay.h>
+#include <linux/gpio/consumer.h>
#include <linux/module.h>
+#include <linux/of_gpio.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
@@ -32,6 +31,8 @@
#define PCM3168A_FMT_RIGHT_J_16 0x3
#define PCM3168A_FMT_DSP_A 0x4
#define PCM3168A_FMT_DSP_B 0x5
+#define PCM3168A_FMT_I2S_TDM 0x6
+#define PCM3168A_FMT_LEFT_J_TDM 0x7
#define PCM3168A_FMT_DSP_MASK 0x4
#define PCM3168A_NUM_SUPPLIES 6
@@ -44,15 +45,27 @@
"VCCDA2"
};
+#define PCM3168A_DAI_DAC 0
+#define PCM3168A_DAI_ADC 1
+
+/* ADC/DAC side parameters */
+struct pcm3168a_io_params {
+ bool master_mode;
+ unsigned int fmt;
+ int tdm_slots;
+ u32 tdm_mask;
+ int slot_width;
+};
+
struct pcm3168a_priv {
struct regulator_bulk_data supplies[PCM3168A_NUM_SUPPLIES];
struct regmap *regmap;
struct clk *scki;
- bool adc_master_mode;
- bool dac_master_mode;
+ struct gpio_desc *gpio_rst;
unsigned long sysclk;
- unsigned int adc_fmt;
- unsigned int dac_fmt;
+
+ struct pcm3168a_io_params io_params[2];
+ struct snd_soc_dai_driver dai_drv[2];
};
static const char *const pcm3168a_roll_off[] = { "Sharp", "Slow" };
@@ -130,10 +143,6 @@
SOC_DOUBLE("DAC2 Invert Switch", PCM3168A_DAC_INV, 2, 3, 1, 0),
SOC_DOUBLE("DAC3 Invert Switch", PCM3168A_DAC_INV, 4, 5, 1, 0),
SOC_DOUBLE("DAC4 Invert Switch", PCM3168A_DAC_INV, 6, 7, 1, 0),
- SOC_DOUBLE_STS("DAC1 Zero Flag", PCM3168A_DAC_ZERO, 0, 1, 1, 0),
- SOC_DOUBLE_STS("DAC2 Zero Flag", PCM3168A_DAC_ZERO, 2, 3, 1, 0),
- SOC_DOUBLE_STS("DAC3 Zero Flag", PCM3168A_DAC_ZERO, 4, 5, 1, 0),
- SOC_DOUBLE_STS("DAC4 Zero Flag", PCM3168A_DAC_ZERO, 6, 7, 1, 0),
SOC_ENUM("DAC Volume Control Type", pcm3168a_dac_volume_type),
SOC_ENUM("DAC Volume Rate Multiplier", pcm3168a_dac_att_mult),
SOC_ENUM("DAC De-Emphasis", pcm3168a_dac_demp),
@@ -173,9 +182,6 @@
SOC_DOUBLE("ADC1 Mute Switch", PCM3168A_ADC_MUTE, 0, 1, 1, 0),
SOC_DOUBLE("ADC2 Mute Switch", PCM3168A_ADC_MUTE, 2, 3, 1, 0),
SOC_DOUBLE("ADC3 Mute Switch", PCM3168A_ADC_MUTE, 4, 5, 1, 0),
- SOC_DOUBLE_STS("ADC1 Overflow Flag", PCM3168A_ADC_OV, 0, 1, 1, 0),
- SOC_DOUBLE_STS("ADC2 Overflow Flag", PCM3168A_ADC_OV, 2, 3, 1, 0),
- SOC_DOUBLE_STS("ADC3 Overflow Flag", PCM3168A_ADC_OV, 4, 5, 1, 0),
SOC_ENUM("ADC Volume Control Type", pcm3168a_adc_volume_type),
SOC_ENUM("ADC Volume Rate Multiplier", pcm3168a_adc_att_mult),
SOC_ENUM("ADC Overflow Flag Polarity", pcm3168a_adc_ov_pol),
@@ -267,7 +273,7 @@
#define PCM3168A_NUM_SCKI_RATIOS_DAC ARRAY_SIZE(pcm3168a_scki_ratios)
#define PCM3168A_NUM_SCKI_RATIOS_ADC (ARRAY_SIZE(pcm3168a_scki_ratios) - 2)
-#define PCM1368A_MAX_SYSCLK 36864000
+#define PCM3168A_MAX_SYSCLK 36864000
static int pcm3168a_reset(struct pcm3168a_priv *pcm3168a)
{
@@ -284,7 +290,7 @@
PCM3168A_MRST_MASK | PCM3168A_SRST_MASK);
}
-static int pcm3168a_digital_mute(struct snd_soc_dai *dai, int mute)
+static int pcm3168a_mute(struct snd_soc_dai *dai, int mute, int direction)
{
struct snd_soc_component *component = dai->component;
struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
@@ -300,7 +306,14 @@
struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(dai->component);
int ret;
- if (freq > PCM1368A_MAX_SYSCLK)
+ /*
+ * Some sound card sets 0 Hz as reset,
+ * but it is impossible to set. Ignore it here
+ */
+ if (freq == 0)
+ return 0;
+
+ if (freq > PCM3168A_MAX_SYSCLK)
return -EINVAL;
ret = clk_set_rate(pcm3168a->scki, freq);
@@ -312,8 +325,35 @@
return 0;
}
-static int pcm3168a_set_dai_fmt(struct snd_soc_dai *dai,
- unsigned int format, bool dac)
+static void pcm3168a_update_fixup_pcm_stream(struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
+ u64 formats = SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE;
+ unsigned int channel_max = dai->id == PCM3168A_DAI_DAC ? 8 : 6;
+
+ if (pcm3168a->io_params[dai->id].fmt == PCM3168A_FMT_RIGHT_J) {
+ /* S16_LE is only supported in RIGHT_J mode */
+ formats |= SNDRV_PCM_FMTBIT_S16_LE;
+
+ /*
+ * If multi DIN/DOUT is not selected, RIGHT_J can only support
+ * two channels (no TDM support)
+ */
+ if (pcm3168a->io_params[dai->id].tdm_slots != 2)
+ channel_max = 2;
+ }
+
+ if (dai->id == PCM3168A_DAI_DAC) {
+ dai->driver->playback.channels_max = channel_max;
+ dai->driver->playback.formats = formats;
+ } else {
+ dai->driver->capture.channels_max = channel_max;
+ dai->driver->capture.formats = formats;
+ }
+}
+
+static int pcm3168a_set_dai_fmt(struct snd_soc_dai *dai, unsigned int format)
{
struct snd_soc_component *component = dai->component;
struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
@@ -360,35 +400,59 @@
return -EINVAL;
}
- if (dac) {
+ if (dai->id == PCM3168A_DAI_DAC) {
reg = PCM3168A_DAC_PWR_MST_FMT;
mask = PCM3168A_DAC_FMT_MASK;
shift = PCM3168A_DAC_FMT_SHIFT;
- pcm3168a->dac_master_mode = master_mode;
- pcm3168a->dac_fmt = fmt;
} else {
reg = PCM3168A_ADC_MST_FMT;
mask = PCM3168A_ADC_FMTAD_MASK;
shift = PCM3168A_ADC_FMTAD_SHIFT;
- pcm3168a->adc_master_mode = master_mode;
- pcm3168a->adc_fmt = fmt;
}
+ pcm3168a->io_params[dai->id].master_mode = master_mode;
+ pcm3168a->io_params[dai->id].fmt = fmt;
+
regmap_update_bits(pcm3168a->regmap, reg, mask, fmt << shift);
+
+ pcm3168a_update_fixup_pcm_stream(dai);
return 0;
}
-static int pcm3168a_set_dai_fmt_dac(struct snd_soc_dai *dai,
- unsigned int format)
+static int pcm3168a_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
+ unsigned int rx_mask, int slots,
+ int slot_width)
{
- return pcm3168a_set_dai_fmt(dai, format, true);
-}
+ struct snd_soc_component *component = dai->component;
+ struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
+ struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id];
-static int pcm3168a_set_dai_fmt_adc(struct snd_soc_dai *dai,
- unsigned int format)
-{
- return pcm3168a_set_dai_fmt(dai, format, false);
+ if (tx_mask >= (1<<slots) || rx_mask >= (1<<slots)) {
+ dev_err(component->dev,
+ "Bad tdm mask tx: 0x%08x rx: 0x%08x slots %d\n",
+ tx_mask, rx_mask, slots);
+ return -EINVAL;
+ }
+
+ if (slot_width &&
+ (slot_width != 16 && slot_width != 24 && slot_width != 32 )) {
+ dev_err(component->dev, "Unsupported slot_width %d\n",
+ slot_width);
+ return -EINVAL;
+ }
+
+ io_params->tdm_slots = slots;
+ io_params->slot_width = slot_width;
+ /* Ignore the not relevant mask for the DAI/direction */
+ if (dai->id == PCM3168A_DAI_DAC)
+ io_params->tdm_mask = tx_mask;
+ else
+ io_params->tdm_mask = rx_mask;
+
+ pcm3168a_update_fixup_pcm_stream(dai);
+
+ return 0;
}
static int pcm3168a_hw_params(struct snd_pcm_substream *substream,
@@ -397,31 +461,31 @@
{
struct snd_soc_component *component = dai->component;
struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(component);
- bool tx, master_mode;
+ struct pcm3168a_io_params *io_params = &pcm3168a->io_params[dai->id];
+ bool master_mode;
u32 val, mask, shift, reg;
unsigned int rate, fmt, ratio, max_ratio;
- int i, min_frame_size;
+ unsigned int tdm_slots;
+ int i, slot_width;
rate = params_rate(params);
ratio = pcm3168a->sysclk / rate;
- tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
- if (tx) {
+ if (dai->id == PCM3168A_DAI_DAC) {
max_ratio = PCM3168A_NUM_SCKI_RATIOS_DAC;
reg = PCM3168A_DAC_PWR_MST_FMT;
mask = PCM3168A_DAC_MSDA_MASK;
shift = PCM3168A_DAC_MSDA_SHIFT;
- master_mode = pcm3168a->dac_master_mode;
- fmt = pcm3168a->dac_fmt;
} else {
max_ratio = PCM3168A_NUM_SCKI_RATIOS_ADC;
reg = PCM3168A_ADC_MST_FMT;
mask = PCM3168A_ADC_MSAD_MASK;
shift = PCM3168A_ADC_MSAD_SHIFT;
- master_mode = pcm3168a->adc_master_mode;
- fmt = pcm3168a->adc_fmt;
}
+
+ master_mode = io_params->master_mode;
+ fmt = io_params->fmt;
for (i = 0; i < max_ratio; i++) {
if (pcm3168a_scki_ratios[i] == ratio)
@@ -433,26 +497,60 @@
return -EINVAL;
}
- min_frame_size = params_width(params) * 2;
- switch (min_frame_size) {
- case 32:
+ if (io_params->slot_width)
+ slot_width = io_params->slot_width;
+ else
+ slot_width = params_width(params);
+
+ switch (slot_width) {
+ case 16:
if (master_mode || (fmt != PCM3168A_FMT_RIGHT_J)) {
- dev_err(component->dev, "32-bit frames are supported only for slave mode using right justified\n");
+ dev_err(component->dev, "16-bit slots are supported only for slave mode using right justified\n");
return -EINVAL;
}
fmt = PCM3168A_FMT_RIGHT_J_16;
break;
- case 48:
+ case 24:
if (master_mode || (fmt & PCM3168A_FMT_DSP_MASK)) {
- dev_err(component->dev, "48-bit frames not supported in master mode, or slave mode using DSP\n");
+ dev_err(component->dev, "24-bit slots not supported in master mode, or slave mode using DSP\n");
return -EINVAL;
}
break;
- case 64:
+ case 32:
break;
default:
- dev_err(component->dev, "unsupported frame size: %d\n", min_frame_size);
+ dev_err(component->dev, "unsupported frame size: %d\n", slot_width);
return -EINVAL;
+ }
+
+ if (io_params->tdm_slots)
+ tdm_slots = io_params->tdm_slots;
+ else
+ tdm_slots = params_channels(params);
+
+ /*
+ * Switch the codec to TDM mode when more than 2 TDM slots are needed
+ * for the stream.
+ * If pcm3168a->tdm_slots is not set or set to more than 2 (8/6 usually)
+ * then DIN1/DOUT1 is used in TDM mode.
+ * If pcm3168a->tdm_slots is set to 2 then DIN1/2/3/4 and DOUT1/2/3 is
+ * used in normal mode, no need to switch to TDM modes.
+ */
+ if (tdm_slots > 2) {
+ switch (fmt) {
+ case PCM3168A_FMT_I2S:
+ case PCM3168A_FMT_DSP_A:
+ fmt = PCM3168A_FMT_I2S_TDM;
+ break;
+ case PCM3168A_FMT_LEFT_J:
+ case PCM3168A_FMT_DSP_B:
+ fmt = PCM3168A_FMT_LEFT_J_TDM;
+ break;
+ default:
+ dev_err(component->dev,
+ "TDM is supported under DSP/I2S/Left_J only\n");
+ return -EINVAL;
+ }
}
if (master_mode)
@@ -462,7 +560,7 @@
regmap_update_bits(pcm3168a->regmap, reg, mask, val);
- if (tx) {
+ if (dai->id == PCM3168A_DAI_DAC) {
mask = PCM3168A_DAC_FMT_MASK;
shift = PCM3168A_DAC_FMT_SHIFT;
} else {
@@ -475,22 +573,19 @@
return 0;
}
-static const struct snd_soc_dai_ops pcm3168a_dac_dai_ops = {
- .set_fmt = pcm3168a_set_dai_fmt_dac,
+static const struct snd_soc_dai_ops pcm3168a_dai_ops = {
+ .set_fmt = pcm3168a_set_dai_fmt,
.set_sysclk = pcm3168a_set_dai_sysclk,
.hw_params = pcm3168a_hw_params,
- .digital_mute = pcm3168a_digital_mute
-};
-
-static const struct snd_soc_dai_ops pcm3168a_adc_dai_ops = {
- .set_fmt = pcm3168a_set_dai_fmt_adc,
- .set_sysclk = pcm3168a_set_dai_sysclk,
- .hw_params = pcm3168a_hw_params
+ .mute_stream = pcm3168a_mute,
+ .set_tdm_slot = pcm3168a_set_tdm_slot,
+ .no_capture_mute = 1,
};
static struct snd_soc_dai_driver pcm3168a_dais[] = {
{
.name = "pcm3168a-dac",
+ .id = PCM3168A_DAI_DAC,
.playback = {
.stream_name = "Playback",
.channels_min = 1,
@@ -498,10 +593,11 @@
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = PCM3168A_FORMATS
},
- .ops = &pcm3168a_dac_dai_ops
+ .ops = &pcm3168a_dai_ops
},
{
.name = "pcm3168a-adc",
+ .id = PCM3168A_DAI_ADC,
.capture = {
.stream_name = "Capture",
.channels_min = 1,
@@ -509,7 +605,7 @@
.rates = SNDRV_PCM_RATE_8000_96000,
.formats = PCM3168A_FORMATS
},
- .ops = &pcm3168a_adc_dai_ops
+ .ops = &pcm3168a_dai_ops
},
};
@@ -558,6 +654,7 @@
static bool pcm3168a_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
+ case PCM3168A_RST_SMODE:
case PCM3168A_DAC_ZERO:
case PCM3168A_ADC_OV:
return true;
@@ -617,6 +714,25 @@
dev_set_drvdata(dev, pcm3168a);
+ /*
+ * Request the reset (connected to RST pin) gpio line as non exclusive
+ * as the same reset line might be connected to multiple pcm3168a codec
+ *
+ * The RST is low active, we want the GPIO line to be high initially, so
+ * request the initial level to LOW which in practice means DEASSERTED:
+ * The deasserted level of GPIO_ACTIVE_LOW is HIGH.
+ */
+ pcm3168a->gpio_rst = devm_gpiod_get_optional(dev, "reset",
+ GPIOD_OUT_LOW |
+ GPIOD_FLAGS_BIT_NONEXCLUSIVE);
+ if (IS_ERR(pcm3168a->gpio_rst)) {
+ ret = PTR_ERR(pcm3168a->gpio_rst);
+ if (ret != -EPROBE_DEFER )
+ dev_err(dev, "failed to acquire RST gpio: %d\n", ret);
+
+ return ret;
+ }
+
pcm3168a->scki = devm_clk_get(dev, "scki");
if (IS_ERR(pcm3168a->scki)) {
ret = PTR_ERR(pcm3168a->scki);
@@ -658,18 +774,28 @@
goto err_regulator;
}
- ret = pcm3168a_reset(pcm3168a);
- if (ret) {
- dev_err(dev, "Failed to reset device: %d\n", ret);
- goto err_regulator;
+ if (pcm3168a->gpio_rst) {
+ /*
+ * The device is taken out from reset via GPIO line, wait for
+ * 3846 SCKI clock cycles for the internal reset de-assertion
+ */
+ msleep(DIV_ROUND_UP(3846 * 1000, pcm3168a->sysclk));
+ } else {
+ ret = pcm3168a_reset(pcm3168a);
+ if (ret) {
+ dev_err(dev, "Failed to reset device: %d\n", ret);
+ goto err_regulator;
+ }
}
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_runtime_idle(dev);
- ret = devm_snd_soc_register_component(dev, &pcm3168a_driver, pcm3168a_dais,
- ARRAY_SIZE(pcm3168a_dais));
+ memcpy(pcm3168a->dai_drv, pcm3168a_dais, sizeof(pcm3168a->dai_drv));
+ ret = devm_snd_soc_register_component(dev, &pcm3168a_driver,
+ pcm3168a->dai_drv,
+ ARRAY_SIZE(pcm3168a->dai_drv));
if (ret) {
dev_err(dev, "failed to register component: %d\n", ret);
goto err_regulator;
@@ -698,6 +824,15 @@
void pcm3168a_remove(struct device *dev)
{
+ struct pcm3168a_priv *pcm3168a = dev_get_drvdata(dev);
+
+ /*
+ * The RST is low active, we want the GPIO line to be low when the
+ * driver is removed, so set level to 1 which in practice means
+ * ASSERTED:
+ * The asserted level of GPIO_ACTIVE_LOW is LOW.
+ */
+ gpiod_set_value_cansleep(pcm3168a->gpio_rst, 1);
pm_runtime_disable(dev);
#ifndef CONFIG_PM
pcm3168a_disable(dev);
--
Gitblit v1.6.2