summaryrefslogtreecommitdiffstats
path: root/sound/soc/hisilicon/hi6210-i2s.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/soc/hisilicon/hi6210-i2s.c')
-rw-r--r--sound/soc/hisilicon/hi6210-i2s.c612
1 files changed, 612 insertions, 0 deletions
diff --git a/sound/soc/hisilicon/hi6210-i2s.c b/sound/soc/hisilicon/hi6210-i2s.c
new file mode 100644
index 000000000..27219a9e7
--- /dev/null
+++ b/sound/soc/hisilicon/hi6210-i2s.c
@@ -0,0 +1,612 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * linux/sound/soc/m8m/hi6210_i2s.c - I2S IP driver
+ *
+ * Copyright (C) 2015 Linaro, Ltd
+ * Author: Andy Green <andy.green@linaro.org>
+ *
+ * This driver only deals with S2 interface (BT)
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/jiffies.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+#include <linux/interrupt.h>
+#include <linux/reset.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/mfd/syscon.h>
+#include <linux/reset-controller.h>
+
+#include "hi6210-i2s.h"
+
+struct hi6210_i2s {
+ struct device *dev;
+ struct reset_control *rc;
+ struct clk *clk[8];
+ int clocks;
+ struct snd_soc_dai_driver dai;
+ void __iomem *base;
+ struct regmap *sysctrl;
+ phys_addr_t base_phys;
+ struct snd_dmaengine_dai_dma_data dma_data[2];
+ int clk_rate;
+ spinlock_t lock;
+ int rate;
+ int format;
+ u8 bits;
+ u8 channels;
+ u8 id;
+ u8 channel_length;
+ u8 use;
+ u32 master:1;
+ u32 status:1;
+};
+
+#define SC_PERIPH_CLKEN1 0x210
+#define SC_PERIPH_CLKDIS1 0x214
+
+#define SC_PERIPH_CLKEN3 0x230
+#define SC_PERIPH_CLKDIS3 0x234
+
+#define SC_PERIPH_CLKEN12 0x270
+#define SC_PERIPH_CLKDIS12 0x274
+
+#define SC_PERIPH_RSTEN1 0x310
+#define SC_PERIPH_RSTDIS1 0x314
+#define SC_PERIPH_RSTSTAT1 0x318
+
+#define SC_PERIPH_RSTEN2 0x320
+#define SC_PERIPH_RSTDIS2 0x324
+#define SC_PERIPH_RSTSTAT2 0x328
+
+#define SOC_PMCTRL_BBPPLLALIAS 0x48
+
+enum {
+ CLK_DACODEC,
+ CLK_I2S_BASE,
+};
+
+static inline void hi6210_write_reg(struct hi6210_i2s *i2s, int reg, u32 val)
+{
+ writel(val, i2s->base + reg);
+}
+
+static inline u32 hi6210_read_reg(struct hi6210_i2s *i2s, int reg)
+{
+ return readl(i2s->base + reg);
+}
+
+static int hi6210_i2s_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
+ int ret, n;
+ u32 val;
+
+ /* deassert reset on ABB */
+ regmap_read(i2s->sysctrl, SC_PERIPH_RSTSTAT2, &val);
+ if (val & BIT(4))
+ regmap_write(i2s->sysctrl, SC_PERIPH_RSTDIS2, BIT(4));
+
+ for (n = 0; n < i2s->clocks; n++) {
+ ret = clk_prepare_enable(i2s->clk[n]);
+ if (ret)
+ goto err_unprepare_clk;
+ }
+
+ ret = clk_set_rate(i2s->clk[CLK_I2S_BASE], 49152000);
+ if (ret) {
+ dev_err(i2s->dev, "%s: setting 49.152MHz base rate failed %d\n",
+ __func__, ret);
+ goto err_unprepare_clk;
+ }
+
+ /* enable clock before frequency division */
+ regmap_write(i2s->sysctrl, SC_PERIPH_CLKEN12, BIT(9));
+
+ /* enable codec working clock / == "codec bus clock" */
+ regmap_write(i2s->sysctrl, SC_PERIPH_CLKEN1, BIT(5));
+
+ /* deassert reset on codec / interface clock / working clock */
+ regmap_write(i2s->sysctrl, SC_PERIPH_RSTEN1, BIT(5));
+ regmap_write(i2s->sysctrl, SC_PERIPH_RSTDIS1, BIT(5));
+
+ /* not interested in i2s irqs */
+ val = hi6210_read_reg(i2s, HII2S_CODEC_IRQ_MASK);
+ val |= 0x3f;
+ hi6210_write_reg(i2s, HII2S_CODEC_IRQ_MASK, val);
+
+
+ /* reset the stereo downlink fifo */
+ val = hi6210_read_reg(i2s, HII2S_APB_AFIFO_CFG_1);
+ val |= (BIT(5) | BIT(4));
+ hi6210_write_reg(i2s, HII2S_APB_AFIFO_CFG_1, val);
+
+ val = hi6210_read_reg(i2s, HII2S_APB_AFIFO_CFG_1);
+ val &= ~(BIT(5) | BIT(4));
+ hi6210_write_reg(i2s, HII2S_APB_AFIFO_CFG_1, val);
+
+
+ val = hi6210_read_reg(i2s, HII2S_SW_RST_N);
+ val &= ~(HII2S_SW_RST_N__ST_DL_WORDLEN_MASK <<
+ HII2S_SW_RST_N__ST_DL_WORDLEN_SHIFT);
+ val |= (HII2S_BITS_16 << HII2S_SW_RST_N__ST_DL_WORDLEN_SHIFT);
+ hi6210_write_reg(i2s, HII2S_SW_RST_N, val);
+
+ val = hi6210_read_reg(i2s, HII2S_MISC_CFG);
+ /* mux 11/12 = APB not i2s */
+ val &= ~HII2S_MISC_CFG__ST_DL_TEST_SEL;
+ /* BT R ch 0 = mixer op of DACR ch */
+ val &= ~HII2S_MISC_CFG__S2_DOUT_RIGHT_SEL;
+ val &= ~HII2S_MISC_CFG__S2_DOUT_TEST_SEL;
+
+ val |= HII2S_MISC_CFG__S2_DOUT_RIGHT_SEL;
+ /* BT L ch = 1 = mux 7 = "mixer output of DACL */
+ val |= HII2S_MISC_CFG__S2_DOUT_TEST_SEL;
+ hi6210_write_reg(i2s, HII2S_MISC_CFG, val);
+
+ val = hi6210_read_reg(i2s, HII2S_SW_RST_N);
+ val |= HII2S_SW_RST_N__SW_RST_N;
+ hi6210_write_reg(i2s, HII2S_SW_RST_N, val);
+
+ return 0;
+
+err_unprepare_clk:
+ while (n--)
+ clk_disable_unprepare(i2s->clk[n]);
+ return ret;
+}
+
+static void hi6210_i2s_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
+ int n;
+
+ for (n = 0; n < i2s->clocks; n++)
+ clk_disable_unprepare(i2s->clk[n]);
+
+ regmap_write(i2s->sysctrl, SC_PERIPH_RSTEN1, BIT(5));
+}
+
+static void hi6210_i2s_txctrl(struct snd_soc_dai *cpu_dai, int on)
+{
+ struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
+ u32 val;
+
+ spin_lock(&i2s->lock);
+ if (on) {
+ /* enable S2 TX */
+ val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
+ val |= HII2S_I2S_CFG__S2_IF_TX_EN;
+ hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
+ } else {
+ /* disable S2 TX */
+ val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
+ val &= ~HII2S_I2S_CFG__S2_IF_TX_EN;
+ hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
+ }
+ spin_unlock(&i2s->lock);
+}
+
+static void hi6210_i2s_rxctrl(struct snd_soc_dai *cpu_dai, int on)
+{
+ struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
+ u32 val;
+
+ spin_lock(&i2s->lock);
+ if (on) {
+ val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
+ val |= HII2S_I2S_CFG__S2_IF_RX_EN;
+ hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
+ } else {
+ val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
+ val &= ~HII2S_I2S_CFG__S2_IF_RX_EN;
+ hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
+ }
+ spin_unlock(&i2s->lock);
+}
+
+static int hi6210_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+ struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
+
+ /*
+ * We don't actually set the hardware until the hw_params
+ * call, but we need to validate the user input here.
+ */
+ switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+ case SND_SOC_DAIFMT_BC_FC:
+ case SND_SOC_DAIFMT_BP_FP:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ case SND_SOC_DAIFMT_LEFT_J:
+ case SND_SOC_DAIFMT_RIGHT_J:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ i2s->format = fmt;
+ i2s->master = (i2s->format & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) ==
+ SND_SOC_DAIFMT_BP_FP;
+
+ return 0;
+}
+
+static int hi6210_i2s_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
+ u32 bits = 0, rate = 0, signed_data = 0, fmt = 0;
+ u32 val;
+ struct snd_dmaengine_dai_dma_data *dma_data;
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_U16_LE:
+ signed_data = HII2S_I2S_CFG__S2_CODEC_DATA_FORMAT;
+ fallthrough;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ bits = HII2S_BITS_16;
+ break;
+ case SNDRV_PCM_FORMAT_U24_LE:
+ signed_data = HII2S_I2S_CFG__S2_CODEC_DATA_FORMAT;
+ fallthrough;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ bits = HII2S_BITS_24;
+ break;
+ default:
+ dev_err(cpu_dai->dev, "Bad format\n");
+ return -EINVAL;
+ }
+
+
+ switch (params_rate(params)) {
+ case 8000:
+ rate = HII2S_FS_RATE_8KHZ;
+ break;
+ case 16000:
+ rate = HII2S_FS_RATE_16KHZ;
+ break;
+ case 32000:
+ rate = HII2S_FS_RATE_32KHZ;
+ break;
+ case 48000:
+ rate = HII2S_FS_RATE_48KHZ;
+ break;
+ case 96000:
+ rate = HII2S_FS_RATE_96KHZ;
+ break;
+ case 192000:
+ rate = HII2S_FS_RATE_192KHZ;
+ break;
+ default:
+ dev_err(cpu_dai->dev, "Bad rate: %d\n", params_rate(params));
+ return -EINVAL;
+ }
+
+ if (!(params_channels(params))) {
+ dev_err(cpu_dai->dev, "Bad channels\n");
+ return -EINVAL;
+ }
+
+ dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);
+
+ switch (bits) {
+ case HII2S_BITS_24:
+ i2s->bits = 32;
+ dma_data->addr_width = 3;
+ break;
+ default:
+ i2s->bits = 16;
+ dma_data->addr_width = 2;
+ break;
+ }
+ i2s->rate = params_rate(params);
+ i2s->channels = params_channels(params);
+ i2s->channel_length = i2s->channels * i2s->bits;
+
+ val = hi6210_read_reg(i2s, HII2S_ST_DL_FIFO_TH_CFG);
+ val &= ~((HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AEMPTY_MASK <<
+ HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AEMPTY_SHIFT) |
+ (HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AFULL_MASK <<
+ HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AFULL_SHIFT) |
+ (HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AEMPTY_MASK <<
+ HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AEMPTY_SHIFT) |
+ (HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AFULL_MASK <<
+ HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AFULL_SHIFT));
+ val |= ((16 << HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AEMPTY_SHIFT) |
+ (30 << HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AFULL_SHIFT) |
+ (16 << HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AEMPTY_SHIFT) |
+ (30 << HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AFULL_SHIFT));
+ hi6210_write_reg(i2s, HII2S_ST_DL_FIFO_TH_CFG, val);
+
+
+ val = hi6210_read_reg(i2s, HII2S_IF_CLK_EN_CFG);
+ val |= (BIT(19) | BIT(18) | BIT(17) |
+ HII2S_IF_CLK_EN_CFG__S2_IF_CLK_EN |
+ HII2S_IF_CLK_EN_CFG__S2_OL_MIXER_EN |
+ HII2S_IF_CLK_EN_CFG__S2_OL_SRC_EN |
+ HII2S_IF_CLK_EN_CFG__ST_DL_R_EN |
+ HII2S_IF_CLK_EN_CFG__ST_DL_L_EN);
+ hi6210_write_reg(i2s, HII2S_IF_CLK_EN_CFG, val);
+
+
+ val = hi6210_read_reg(i2s, HII2S_DIG_FILTER_CLK_EN_CFG);
+ val &= ~(HII2S_DIG_FILTER_CLK_EN_CFG__DACR_SDM_EN |
+ HII2S_DIG_FILTER_CLK_EN_CFG__DACR_HBF2I_EN |
+ HII2S_DIG_FILTER_CLK_EN_CFG__DACR_AGC_EN |
+ HII2S_DIG_FILTER_CLK_EN_CFG__DACL_SDM_EN |
+ HII2S_DIG_FILTER_CLK_EN_CFG__DACL_HBF2I_EN |
+ HII2S_DIG_FILTER_CLK_EN_CFG__DACL_AGC_EN);
+ val |= (HII2S_DIG_FILTER_CLK_EN_CFG__DACR_MIXER_EN |
+ HII2S_DIG_FILTER_CLK_EN_CFG__DACL_MIXER_EN);
+ hi6210_write_reg(i2s, HII2S_DIG_FILTER_CLK_EN_CFG, val);
+
+
+ val = hi6210_read_reg(i2s, HII2S_DIG_FILTER_MODULE_CFG);
+ val &= ~(HII2S_DIG_FILTER_MODULE_CFG__DACR_MIXER_IN2_MUTE |
+ HII2S_DIG_FILTER_MODULE_CFG__DACL_MIXER_IN2_MUTE);
+ hi6210_write_reg(i2s, HII2S_DIG_FILTER_MODULE_CFG, val);
+
+ val = hi6210_read_reg(i2s, HII2S_MUX_TOP_MODULE_CFG);
+ val &= ~(HII2S_MUX_TOP_MODULE_CFG__S2_OL_MIXER_IN1_MUTE |
+ HII2S_MUX_TOP_MODULE_CFG__S2_OL_MIXER_IN2_MUTE |
+ HII2S_MUX_TOP_MODULE_CFG__VOICE_DLINK_MIXER_IN1_MUTE |
+ HII2S_MUX_TOP_MODULE_CFG__VOICE_DLINK_MIXER_IN2_MUTE);
+ hi6210_write_reg(i2s, HII2S_MUX_TOP_MODULE_CFG, val);
+
+
+ switch (i2s->format & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
+ case SND_SOC_DAIFMT_BC_FC:
+ i2s->master = false;
+ val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
+ val |= HII2S_I2S_CFG__S2_MST_SLV;
+ hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
+ break;
+ case SND_SOC_DAIFMT_BP_FP:
+ i2s->master = true;
+ val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
+ val &= ~HII2S_I2S_CFG__S2_MST_SLV;
+ hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
+ break;
+ default:
+ WARN_ONCE(1, "Invalid i2s->fmt CLOCK_PROVIDER_MASK. This shouldn't happen\n");
+ return -EINVAL;
+ }
+
+ switch (i2s->format & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ fmt = HII2S_FORMAT_I2S;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ fmt = HII2S_FORMAT_LEFT_JUST;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ fmt = HII2S_FORMAT_RIGHT_JUST;
+ break;
+ default:
+ WARN_ONCE(1, "Invalid i2s->fmt FORMAT_MASK. This shouldn't happen\n");
+ return -EINVAL;
+ }
+
+ val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
+ val &= ~(HII2S_I2S_CFG__S2_FUNC_MODE_MASK <<
+ HII2S_I2S_CFG__S2_FUNC_MODE_SHIFT);
+ val |= fmt << HII2S_I2S_CFG__S2_FUNC_MODE_SHIFT;
+ hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
+
+
+ val = hi6210_read_reg(i2s, HII2S_CLK_SEL);
+ val &= ~(HII2S_CLK_SEL__I2S_BT_FM_SEL | /* BT gets the I2S */
+ HII2S_CLK_SEL__EXT_12_288MHZ_SEL);
+ hi6210_write_reg(i2s, HII2S_CLK_SEL, val);
+
+ dma_data->maxburst = 2;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dma_data->addr = i2s->base_phys + HII2S_ST_DL_CHANNEL;
+ else
+ dma_data->addr = i2s->base_phys + HII2S_STEREO_UPLINK_CHANNEL;
+
+ switch (i2s->channels) {
+ case 1:
+ val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
+ val |= HII2S_I2S_CFG__S2_FRAME_MODE;
+ hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
+ break;
+ default:
+ val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
+ val &= ~HII2S_I2S_CFG__S2_FRAME_MODE;
+ hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
+ break;
+ }
+
+ /* clear loopback, set signed type and word length */
+ val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
+ val &= ~HII2S_I2S_CFG__S2_CODEC_DATA_FORMAT;
+ val &= ~(HII2S_I2S_CFG__S2_CODEC_IO_WORDLENGTH_MASK <<
+ HII2S_I2S_CFG__S2_CODEC_IO_WORDLENGTH_SHIFT);
+ val &= ~(HII2S_I2S_CFG__S2_DIRECT_LOOP_MASK <<
+ HII2S_I2S_CFG__S2_DIRECT_LOOP_SHIFT);
+ val |= signed_data;
+ val |= (bits << HII2S_I2S_CFG__S2_CODEC_IO_WORDLENGTH_SHIFT);
+ hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
+
+
+ if (!i2s->master)
+ return 0;
+
+ /* set DAC and related units to correct rate */
+ val = hi6210_read_reg(i2s, HII2S_FS_CFG);
+ val &= ~(HII2S_FS_CFG__FS_S2_MASK << HII2S_FS_CFG__FS_S2_SHIFT);
+ val &= ~(HII2S_FS_CFG__FS_DACLR_MASK << HII2S_FS_CFG__FS_DACLR_SHIFT);
+ val &= ~(HII2S_FS_CFG__FS_ST_DL_R_MASK <<
+ HII2S_FS_CFG__FS_ST_DL_R_SHIFT);
+ val &= ~(HII2S_FS_CFG__FS_ST_DL_L_MASK <<
+ HII2S_FS_CFG__FS_ST_DL_L_SHIFT);
+ val |= (rate << HII2S_FS_CFG__FS_S2_SHIFT);
+ val |= (rate << HII2S_FS_CFG__FS_DACLR_SHIFT);
+ val |= (rate << HII2S_FS_CFG__FS_ST_DL_R_SHIFT);
+ val |= (rate << HII2S_FS_CFG__FS_ST_DL_L_SHIFT);
+ hi6210_write_reg(i2s, HII2S_FS_CFG, val);
+
+ return 0;
+}
+
+static int hi6210_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *cpu_dai)
+{
+ pr_debug("%s\n", __func__);
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ hi6210_i2s_rxctrl(cpu_dai, 1);
+ else
+ hi6210_i2s_txctrl(cpu_dai, 1);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ hi6210_i2s_rxctrl(cpu_dai, 0);
+ else
+ hi6210_i2s_txctrl(cpu_dai, 0);
+ break;
+ default:
+ dev_err(cpu_dai->dev, "unknown cmd\n");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int hi6210_i2s_dai_probe(struct snd_soc_dai *dai)
+{
+ struct hi6210_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+
+ snd_soc_dai_init_dma_data(dai,
+ &i2s->dma_data[SNDRV_PCM_STREAM_PLAYBACK],
+ &i2s->dma_data[SNDRV_PCM_STREAM_CAPTURE]);
+
+ return 0;
+}
+
+
+static const struct snd_soc_dai_ops hi6210_i2s_dai_ops = {
+ .trigger = hi6210_i2s_trigger,
+ .hw_params = hi6210_i2s_hw_params,
+ .set_fmt = hi6210_i2s_set_fmt,
+ .startup = hi6210_i2s_startup,
+ .shutdown = hi6210_i2s_shutdown,
+};
+
+static const struct snd_soc_dai_driver hi6210_i2s_dai_init = {
+ .probe = hi6210_i2s_dai_probe,
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_U16_LE,
+ .rates = SNDRV_PCM_RATE_48000,
+ },
+ .capture = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_U16_LE,
+ .rates = SNDRV_PCM_RATE_48000,
+ },
+ .ops = &hi6210_i2s_dai_ops,
+};
+
+static const struct snd_soc_component_driver hi6210_i2s_i2s_comp = {
+ .name = "hi6210_i2s-i2s",
+ .legacy_dai_naming = 1,
+};
+
+static int hi6210_i2s_probe(struct platform_device *pdev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ struct hi6210_i2s *i2s;
+ struct resource *res;
+ int ret;
+
+ i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL);
+ if (!i2s)
+ return -ENOMEM;
+
+ i2s->dev = dev;
+ spin_lock_init(&i2s->lock);
+
+ i2s->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+ if (IS_ERR(i2s->base))
+ return PTR_ERR(i2s->base);
+
+ i2s->base_phys = (phys_addr_t)res->start;
+ i2s->dai = hi6210_i2s_dai_init;
+
+ dev_set_drvdata(dev, i2s);
+
+ i2s->sysctrl = syscon_regmap_lookup_by_phandle(node,
+ "hisilicon,sysctrl-syscon");
+ if (IS_ERR(i2s->sysctrl))
+ return PTR_ERR(i2s->sysctrl);
+
+ i2s->clk[CLK_DACODEC] = devm_clk_get(dev, "dacodec");
+ if (IS_ERR(i2s->clk[CLK_DACODEC]))
+ return PTR_ERR(i2s->clk[CLK_DACODEC]);
+ i2s->clocks++;
+
+ i2s->clk[CLK_I2S_BASE] = devm_clk_get(dev, "i2s-base");
+ if (IS_ERR(i2s->clk[CLK_I2S_BASE]))
+ return PTR_ERR(i2s->clk[CLK_I2S_BASE]);
+ i2s->clocks++;
+
+ ret = devm_snd_dmaengine_pcm_register(dev, NULL, 0);
+ if (ret)
+ return ret;
+
+ ret = devm_snd_soc_register_component(dev, &hi6210_i2s_i2s_comp,
+ &i2s->dai, 1);
+ return ret;
+}
+
+static const struct of_device_id hi6210_i2s_dt_ids[] = {
+ { .compatible = "hisilicon,hi6210-i2s" },
+ { /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, hi6210_i2s_dt_ids);
+
+static struct platform_driver hi6210_i2s_driver = {
+ .probe = hi6210_i2s_probe,
+ .driver = {
+ .name = "hi6210_i2s",
+ .of_match_table = hi6210_i2s_dt_ids,
+ },
+};
+
+module_platform_driver(hi6210_i2s_driver);
+
+MODULE_DESCRIPTION("Hisilicon HI6210 I2S driver");
+MODULE_AUTHOR("Andy Green <andy.green@linaro.org>");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 20:49:24 +0000