[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/sound/soc/sunxi/sun4i-i2s.c b/src/kernel/linux/v4.14/sound/soc/sunxi/sun4i-i2s.c
new file mode 100644
index 0000000..d2802fd
--- /dev/null
+++ b/src/kernel/linux/v4.14/sound/soc/sunxi/sun4i-i2s.c
@@ -0,0 +1,1154 @@
+/*
+ * Copyright (C) 2015 Andrea Venturi
+ * Andrea Venturi <be17068@iperbole.bo.it>
+ *
+ * Copyright (C) 2016 Maxime Ripard
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/dmaengine.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#define SUN4I_I2S_CTRL_REG 0x00
+#define SUN4I_I2S_CTRL_SDO_EN_MASK GENMASK(11, 8)
+#define SUN4I_I2S_CTRL_SDO_EN(sdo) BIT(8 + (sdo))
+#define SUN4I_I2S_CTRL_MODE_MASK BIT(5)
+#define SUN4I_I2S_CTRL_MODE_SLAVE (1 << 5)
+#define SUN4I_I2S_CTRL_MODE_MASTER (0 << 5)
+#define SUN4I_I2S_CTRL_TX_EN BIT(2)
+#define SUN4I_I2S_CTRL_RX_EN BIT(1)
+#define SUN4I_I2S_CTRL_GL_EN BIT(0)
+
+#define SUN4I_I2S_FMT0_REG 0x04
+#define SUN4I_I2S_FMT0_LRCLK_POLARITY_MASK BIT(7)
+#define SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED (1 << 7)
+#define SUN4I_I2S_FMT0_LRCLK_POLARITY_NORMAL (0 << 7)
+#define SUN4I_I2S_FMT0_BCLK_POLARITY_MASK BIT(6)
+#define SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED (1 << 6)
+#define SUN4I_I2S_FMT0_BCLK_POLARITY_NORMAL (0 << 6)
+#define SUN4I_I2S_FMT0_SR_MASK GENMASK(5, 4)
+#define SUN4I_I2S_FMT0_SR(sr) ((sr) << 4)
+#define SUN4I_I2S_FMT0_WSS_MASK GENMASK(3, 2)
+#define SUN4I_I2S_FMT0_WSS(wss) ((wss) << 2)
+#define SUN4I_I2S_FMT0_FMT_MASK GENMASK(1, 0)
+#define SUN4I_I2S_FMT0_FMT_RIGHT_J (2 << 0)
+#define SUN4I_I2S_FMT0_FMT_LEFT_J (1 << 0)
+#define SUN4I_I2S_FMT0_FMT_I2S (0 << 0)
+#define SUN4I_I2S_FMT0_POLARITY_INVERTED (1)
+#define SUN4I_I2S_FMT0_POLARITY_NORMAL (0)
+
+#define SUN4I_I2S_FMT1_REG 0x08
+#define SUN4I_I2S_FIFO_TX_REG 0x0c
+#define SUN4I_I2S_FIFO_RX_REG 0x10
+
+#define SUN4I_I2S_FIFO_CTRL_REG 0x14
+#define SUN4I_I2S_FIFO_CTRL_FLUSH_TX BIT(25)
+#define SUN4I_I2S_FIFO_CTRL_FLUSH_RX BIT(24)
+#define SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK BIT(2)
+#define SUN4I_I2S_FIFO_CTRL_TX_MODE(mode) ((mode) << 2)
+#define SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK GENMASK(1, 0)
+#define SUN4I_I2S_FIFO_CTRL_RX_MODE(mode) (mode)
+
+#define SUN4I_I2S_FIFO_STA_REG 0x18
+
+#define SUN4I_I2S_DMA_INT_CTRL_REG 0x1c
+#define SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN BIT(7)
+#define SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN BIT(3)
+
+#define SUN4I_I2S_INT_STA_REG 0x20
+
+#define SUN4I_I2S_CLK_DIV_REG 0x24
+#define SUN4I_I2S_CLK_DIV_MCLK_EN BIT(7)
+#define SUN4I_I2S_CLK_DIV_BCLK_MASK GENMASK(6, 4)
+#define SUN4I_I2S_CLK_DIV_BCLK(bclk) ((bclk) << 4)
+#define SUN4I_I2S_CLK_DIV_MCLK_MASK GENMASK(3, 0)
+#define SUN4I_I2S_CLK_DIV_MCLK(mclk) ((mclk) << 0)
+
+#define SUN4I_I2S_TX_CNT_REG 0x28
+#define SUN4I_I2S_RX_CNT_REG 0x2c
+
+#define SUN4I_I2S_TX_CHAN_SEL_REG 0x30
+#define SUN4I_I2S_CHAN_SEL(num_chan) (((num_chan) - 1) << 0)
+
+#define SUN4I_I2S_TX_CHAN_MAP_REG 0x34
+#define SUN4I_I2S_TX_CHAN_MAP(chan, sample) ((sample) << (chan << 2))
+
+#define SUN4I_I2S_RX_CHAN_SEL_REG 0x38
+#define SUN4I_I2S_RX_CHAN_MAP_REG 0x3c
+
+/* Defines required for sun8i-h3 support */
+#define SUN8I_I2S_CTRL_BCLK_OUT BIT(18)
+#define SUN8I_I2S_CTRL_LRCK_OUT BIT(17)
+
+#define SUN8I_I2S_FMT0_LRCK_PERIOD_MASK GENMASK(17, 8)
+#define SUN8I_I2S_FMT0_LRCK_PERIOD(period) ((period - 1) << 8)
+
+#define SUN8I_I2S_INT_STA_REG 0x0c
+#define SUN8I_I2S_FIFO_TX_REG 0x20
+
+#define SUN8I_I2S_CHAN_CFG_REG 0x30
+#define SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK GENMASK(6, 4)
+#define SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(chan) ((chan - 1) << 4)
+#define SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK GENMASK(2, 0)
+#define SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(chan) (chan - 1)
+
+#define SUN8I_I2S_TX_CHAN_MAP_REG 0x44
+#define SUN8I_I2S_TX_CHAN_SEL_REG 0x34
+#define SUN8I_I2S_TX_CHAN_OFFSET_MASK GENMASK(13, 12)
+#define SUN8I_I2S_TX_CHAN_OFFSET(offset) (offset << 12)
+#define SUN8I_I2S_TX_CHAN_EN_MASK GENMASK(11, 4)
+#define SUN8I_I2S_TX_CHAN_EN(num_chan) (((1 << num_chan) - 1) << 4)
+
+#define SUN8I_I2S_RX_CHAN_SEL_REG 0x54
+#define SUN8I_I2S_RX_CHAN_MAP_REG 0x58
+
+/**
+ * struct sun4i_i2s_quirks - Differences between SoC variants.
+ *
+ * @has_reset: SoC needs reset deasserted.
+ * @has_slave_select_bit: SoC has a bit to enable slave mode.
+ * @has_fmt_set_lrck_period: SoC requires lrclk period to be set.
+ * @has_chcfg: tx and rx slot number need to be set.
+ * @has_chsel_tx_chen: SoC requires that the tx channels are enabled.
+ * @has_chsel_offset: SoC uses offset for selecting dai operational mode.
+ * @reg_offset_txdata: offset of the tx fifo.
+ * @sun4i_i2s_regmap: regmap config to use.
+ * @mclk_offset: Value by which mclkdiv needs to be adjusted.
+ * @bclk_offset: Value by which bclkdiv needs to be adjusted.
+ * @fmt_offset: Value by which wss and sr needs to be adjusted.
+ * @field_clkdiv_mclk_en: regmap field to enable mclk output.
+ * @field_fmt_wss: regmap field to set word select size.
+ * @field_fmt_sr: regmap field to set sample resolution.
+ * @field_fmt_bclk: regmap field to set clk polarity.
+ * @field_fmt_lrclk: regmap field to set frame polarity.
+ * @field_fmt_mode: regmap field to set the operational mode.
+ * @field_txchanmap: location of the tx channel mapping register.
+ * @field_rxchanmap: location of the rx channel mapping register.
+ * @field_txchansel: location of the tx channel select bit fields.
+ * @field_rxchansel: location of the rx channel select bit fields.
+ */
+struct sun4i_i2s_quirks {
+ bool has_reset;
+ bool has_slave_select_bit;
+ bool has_fmt_set_lrck_period;
+ bool has_chcfg;
+ bool has_chsel_tx_chen;
+ bool has_chsel_offset;
+ unsigned int reg_offset_txdata; /* TX FIFO */
+ const struct regmap_config *sun4i_i2s_regmap;
+ unsigned int mclk_offset;
+ unsigned int bclk_offset;
+ unsigned int fmt_offset;
+
+ /* Register fields for i2s */
+ struct reg_field field_clkdiv_mclk_en;
+ struct reg_field field_fmt_wss;
+ struct reg_field field_fmt_sr;
+ struct reg_field field_fmt_bclk;
+ struct reg_field field_fmt_lrclk;
+ struct reg_field field_fmt_mode;
+ struct reg_field field_txchanmap;
+ struct reg_field field_rxchanmap;
+ struct reg_field field_txchansel;
+ struct reg_field field_rxchansel;
+};
+
+struct sun4i_i2s {
+ struct clk *bus_clk;
+ struct clk *mod_clk;
+ struct regmap *regmap;
+ struct reset_control *rst;
+
+ unsigned int mclk_freq;
+
+ struct snd_dmaengine_dai_dma_data capture_dma_data;
+ struct snd_dmaengine_dai_dma_data playback_dma_data;
+
+ /* Register fields for i2s */
+ struct regmap_field *field_clkdiv_mclk_en;
+ struct regmap_field *field_fmt_wss;
+ struct regmap_field *field_fmt_sr;
+ struct regmap_field *field_fmt_bclk;
+ struct regmap_field *field_fmt_lrclk;
+ struct regmap_field *field_fmt_mode;
+ struct regmap_field *field_txchanmap;
+ struct regmap_field *field_rxchanmap;
+ struct regmap_field *field_txchansel;
+ struct regmap_field *field_rxchansel;
+
+ const struct sun4i_i2s_quirks *variant;
+};
+
+struct sun4i_i2s_clk_div {
+ u8 div;
+ u8 val;
+};
+
+static const struct sun4i_i2s_clk_div sun4i_i2s_bclk_div[] = {
+ { .div = 2, .val = 0 },
+ { .div = 4, .val = 1 },
+ { .div = 6, .val = 2 },
+ { .div = 8, .val = 3 },
+ { .div = 12, .val = 4 },
+ { .div = 16, .val = 5 },
+ /* TODO - extend divide ratio supported by newer SoCs */
+};
+
+static const struct sun4i_i2s_clk_div sun4i_i2s_mclk_div[] = {
+ { .div = 1, .val = 0 },
+ { .div = 2, .val = 1 },
+ { .div = 4, .val = 2 },
+ { .div = 6, .val = 3 },
+ { .div = 8, .val = 4 },
+ { .div = 12, .val = 5 },
+ { .div = 16, .val = 6 },
+ { .div = 24, .val = 7 },
+ /* TODO - extend divide ratio supported by newer SoCs */
+};
+
+static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s,
+ unsigned int oversample_rate,
+ unsigned int word_size)
+{
+ int div = oversample_rate / word_size / 2;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sun4i_i2s_bclk_div); i++) {
+ const struct sun4i_i2s_clk_div *bdiv = &sun4i_i2s_bclk_div[i];
+
+ if (bdiv->div == div)
+ return bdiv->val;
+ }
+
+ return -EINVAL;
+}
+
+static int sun4i_i2s_get_mclk_div(struct sun4i_i2s *i2s,
+ unsigned int oversample_rate,
+ unsigned int module_rate,
+ unsigned int sampling_rate)
+{
+ int div = module_rate / sampling_rate / oversample_rate;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sun4i_i2s_mclk_div); i++) {
+ const struct sun4i_i2s_clk_div *mdiv = &sun4i_i2s_mclk_div[i];
+
+ if (mdiv->div == div)
+ return mdiv->val;
+ }
+
+ return -EINVAL;
+}
+
+static int sun4i_i2s_oversample_rates[] = { 128, 192, 256, 384, 512, 768 };
+static bool sun4i_i2s_oversample_is_valid(unsigned int oversample)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(sun4i_i2s_oversample_rates); i++)
+ if (sun4i_i2s_oversample_rates[i] == oversample)
+ return true;
+
+ return false;
+}
+
+static int sun4i_i2s_set_clk_rate(struct sun4i_i2s *i2s,
+ unsigned int rate,
+ unsigned int word_size)
+{
+ unsigned int oversample_rate, clk_rate;
+ int bclk_div, mclk_div;
+ int ret;
+
+ switch (rate) {
+ case 176400:
+ case 88200:
+ case 44100:
+ case 22050:
+ case 11025:
+ clk_rate = 22579200;
+ break;
+
+ case 192000:
+ case 128000:
+ case 96000:
+ case 64000:
+ case 48000:
+ case 32000:
+ case 24000:
+ case 16000:
+ case 12000:
+ case 8000:
+ clk_rate = 24576000;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ ret = clk_set_rate(i2s->mod_clk, clk_rate);
+ if (ret)
+ return ret;
+
+ oversample_rate = i2s->mclk_freq / rate;
+ if (!sun4i_i2s_oversample_is_valid(oversample_rate))
+ return -EINVAL;
+
+ bclk_div = sun4i_i2s_get_bclk_div(i2s, oversample_rate,
+ word_size);
+ if (bclk_div < 0)
+ return -EINVAL;
+
+ mclk_div = sun4i_i2s_get_mclk_div(i2s, oversample_rate,
+ clk_rate, rate);
+ if (mclk_div < 0)
+ return -EINVAL;
+
+ /* Adjust the clock division values if needed */
+ bclk_div += i2s->variant->bclk_offset;
+ mclk_div += i2s->variant->mclk_offset;
+
+ regmap_write(i2s->regmap, SUN4I_I2S_CLK_DIV_REG,
+ SUN4I_I2S_CLK_DIV_BCLK(bclk_div) |
+ SUN4I_I2S_CLK_DIV_MCLK(mclk_div));
+
+ regmap_field_write(i2s->field_clkdiv_mclk_en, 1);
+
+ /* Set sync period */
+ if (i2s->variant->has_fmt_set_lrck_period)
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
+ SUN8I_I2S_FMT0_LRCK_PERIOD_MASK,
+ SUN8I_I2S_FMT0_LRCK_PERIOD(32));
+
+ return 0;
+}
+
+static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+ int sr, wss, channels;
+ u32 width;
+
+ channels = params_channels(params);
+ if (channels != 2)
+ return -EINVAL;
+
+ if (i2s->variant->has_chcfg) {
+ regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
+ SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK,
+ SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(channels));
+ regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
+ SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK,
+ SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(channels));
+ }
+
+ /* Map the channels for playback and capture */
+ regmap_field_write(i2s->field_txchanmap, 0x76543210);
+ regmap_field_write(i2s->field_rxchanmap, 0x00003210);
+
+ /* Configure the channels */
+ regmap_field_write(i2s->field_txchansel,
+ SUN4I_I2S_CHAN_SEL(params_channels(params)));
+
+ regmap_field_write(i2s->field_rxchansel,
+ SUN4I_I2S_CHAN_SEL(params_channels(params)));
+
+ if (i2s->variant->has_chsel_tx_chen)
+ regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
+ SUN8I_I2S_TX_CHAN_EN_MASK,
+ SUN8I_I2S_TX_CHAN_EN(channels));
+
+ switch (params_physical_width(params)) {
+ case 16:
+ width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+ break;
+ default:
+ return -EINVAL;
+ }
+ i2s->playback_dma_data.addr_width = width;
+
+ switch (params_width(params)) {
+ case 16:
+ sr = 0;
+ wss = 0;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ regmap_field_write(i2s->field_fmt_wss,
+ wss + i2s->variant->fmt_offset);
+ regmap_field_write(i2s->field_fmt_sr,
+ sr + i2s->variant->fmt_offset);
+
+ return sun4i_i2s_set_clk_rate(i2s, params_rate(params),
+ params_width(params));
+}
+
+static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+ u32 val;
+ u32 offset = 0;
+ u32 bclk_polarity = SUN4I_I2S_FMT0_POLARITY_NORMAL;
+ u32 lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_NORMAL;
+
+ /* DAI Mode */
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ val = SUN4I_I2S_FMT0_FMT_I2S;
+ offset = 1;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ val = SUN4I_I2S_FMT0_FMT_LEFT_J;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ val = SUN4I_I2S_FMT0_FMT_RIGHT_J;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (i2s->variant->has_chsel_offset) {
+ /*
+ * offset being set indicates that we're connected to an i2s
+ * device, however offset is only used on the sun8i block and
+ * i2s shares the same setting with the LJ format. Increment
+ * val so that the bit to value to write is correct.
+ */
+ if (offset > 0)
+ val++;
+ /* blck offset determines whether i2s or LJ */
+ regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
+ SUN8I_I2S_TX_CHAN_OFFSET_MASK,
+ SUN8I_I2S_TX_CHAN_OFFSET(offset));
+
+ regmap_update_bits(i2s->regmap, SUN8I_I2S_RX_CHAN_SEL_REG,
+ SUN8I_I2S_TX_CHAN_OFFSET_MASK,
+ SUN8I_I2S_TX_CHAN_OFFSET(offset));
+ }
+
+ regmap_field_write(i2s->field_fmt_mode, val);
+
+ /* DAI clock polarity */
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_IB_IF:
+ /* Invert both clocks */
+ bclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
+ lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ /* Invert bit clock */
+ bclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ /* Invert frame clock */
+ lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
+ break;
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ regmap_field_write(i2s->field_fmt_bclk, bclk_polarity);
+ regmap_field_write(i2s->field_fmt_lrclk, lrclk_polarity);
+
+ if (i2s->variant->has_slave_select_bit) {
+ /* DAI clock master masks */
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ /* BCLK and LRCLK master */
+ val = SUN4I_I2S_CTRL_MODE_MASTER;
+ break;
+ case SND_SOC_DAIFMT_CBM_CFM:
+ /* BCLK and LRCLK slave */
+ val = SUN4I_I2S_CTRL_MODE_SLAVE;
+ break;
+ default:
+ return -EINVAL;
+ }
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN4I_I2S_CTRL_MODE_MASK,
+ val);
+ } else {
+ /*
+ * The newer i2s block does not have a slave select bit,
+ * instead the clk pins are configured as inputs.
+ */
+ /* DAI clock master masks */
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ /* BCLK and LRCLK master */
+ val = SUN8I_I2S_CTRL_BCLK_OUT |
+ SUN8I_I2S_CTRL_LRCK_OUT;
+ break;
+ case SND_SOC_DAIFMT_CBM_CFM:
+ /* BCLK and LRCLK slave */
+ val = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN8I_I2S_CTRL_BCLK_OUT |
+ SUN8I_I2S_CTRL_LRCK_OUT,
+ val);
+ }
+
+ /* Set significant bits in our FIFOs */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
+ SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK |
+ SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK,
+ SUN4I_I2S_FIFO_CTRL_TX_MODE(1) |
+ SUN4I_I2S_FIFO_CTRL_RX_MODE(1));
+ return 0;
+}
+
+static void sun4i_i2s_start_capture(struct sun4i_i2s *i2s)
+{
+ /* Flush RX FIFO */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
+ SUN4I_I2S_FIFO_CTRL_FLUSH_RX,
+ SUN4I_I2S_FIFO_CTRL_FLUSH_RX);
+
+ /* Clear RX counter */
+ regmap_write(i2s->regmap, SUN4I_I2S_RX_CNT_REG, 0);
+
+ /* Enable RX Block */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN4I_I2S_CTRL_RX_EN,
+ SUN4I_I2S_CTRL_RX_EN);
+
+ /* Enable RX DRQ */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
+ SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
+ SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN);
+}
+
+static void sun4i_i2s_start_playback(struct sun4i_i2s *i2s)
+{
+ /* Flush TX FIFO */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
+ SUN4I_I2S_FIFO_CTRL_FLUSH_TX,
+ SUN4I_I2S_FIFO_CTRL_FLUSH_TX);
+
+ /* Clear TX counter */
+ regmap_write(i2s->regmap, SUN4I_I2S_TX_CNT_REG, 0);
+
+ /* Enable TX Block */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN4I_I2S_CTRL_TX_EN,
+ SUN4I_I2S_CTRL_TX_EN);
+
+ /* Enable TX DRQ */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
+ SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
+ SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN);
+}
+
+static void sun4i_i2s_stop_capture(struct sun4i_i2s *i2s)
+{
+ /* Disable RX Block */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN4I_I2S_CTRL_RX_EN,
+ 0);
+
+ /* Disable RX DRQ */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
+ SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
+ 0);
+}
+
+static void sun4i_i2s_stop_playback(struct sun4i_i2s *i2s)
+{
+ /* Disable TX Block */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN4I_I2S_CTRL_TX_EN,
+ 0);
+
+ /* Disable TX DRQ */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
+ SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
+ 0);
+}
+
+static int sun4i_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ sun4i_i2s_start_playback(i2s);
+ else
+ sun4i_i2s_start_capture(i2s);
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ sun4i_i2s_stop_playback(i2s);
+ else
+ sun4i_i2s_stop_capture(i2s);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int sun4i_i2s_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+
+ /* Enable the whole hardware block */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN4I_I2S_CTRL_GL_EN, SUN4I_I2S_CTRL_GL_EN);
+
+ /* Enable the first output line */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN4I_I2S_CTRL_SDO_EN_MASK,
+ SUN4I_I2S_CTRL_SDO_EN(0));
+
+
+ return clk_prepare_enable(i2s->mod_clk);
+}
+
+static void sun4i_i2s_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+
+ clk_disable_unprepare(i2s->mod_clk);
+
+ /* Disable our output lines */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN4I_I2S_CTRL_SDO_EN_MASK, 0);
+
+ /* Disable the whole hardware block */
+ regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
+ SUN4I_I2S_CTRL_GL_EN, 0);
+}
+
+static int sun4i_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
+ unsigned int freq, int dir)
+{
+ struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+
+ if (clk_id != 0)
+ return -EINVAL;
+
+ i2s->mclk_freq = freq;
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops sun4i_i2s_dai_ops = {
+ .hw_params = sun4i_i2s_hw_params,
+ .set_fmt = sun4i_i2s_set_fmt,
+ .set_sysclk = sun4i_i2s_set_sysclk,
+ .shutdown = sun4i_i2s_shutdown,
+ .startup = sun4i_i2s_startup,
+ .trigger = sun4i_i2s_trigger,
+};
+
+static int sun4i_i2s_dai_probe(struct snd_soc_dai *dai)
+{
+ struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
+
+ snd_soc_dai_init_dma_data(dai,
+ &i2s->playback_dma_data,
+ &i2s->capture_dma_data);
+
+ snd_soc_dai_set_drvdata(dai, i2s);
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver sun4i_i2s_dai = {
+ .probe = sun4i_i2s_dai_probe,
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ },
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ },
+ .ops = &sun4i_i2s_dai_ops,
+ .symmetric_rates = 1,
+};
+
+static const struct snd_soc_component_driver sun4i_i2s_component = {
+ .name = "sun4i-dai",
+};
+
+static bool sun4i_i2s_rd_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SUN4I_I2S_FIFO_TX_REG:
+ return false;
+
+ default:
+ return true;
+ }
+}
+
+static bool sun4i_i2s_wr_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SUN4I_I2S_FIFO_RX_REG:
+ case SUN4I_I2S_FIFO_STA_REG:
+ return false;
+
+ default:
+ return true;
+ }
+}
+
+static bool sun4i_i2s_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SUN4I_I2S_FIFO_RX_REG:
+ case SUN4I_I2S_INT_STA_REG:
+ case SUN4I_I2S_RX_CNT_REG:
+ case SUN4I_I2S_TX_CNT_REG:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
+static bool sun8i_i2s_rd_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SUN8I_I2S_FIFO_TX_REG:
+ return false;
+
+ default:
+ return true;
+ }
+}
+
+static bool sun8i_i2s_volatile_reg(struct device *dev, unsigned int reg)
+{
+ if (reg == SUN8I_I2S_INT_STA_REG)
+ return true;
+ if (reg == SUN8I_I2S_FIFO_TX_REG)
+ return false;
+
+ return sun4i_i2s_volatile_reg(dev, reg);
+}
+
+static const struct reg_default sun4i_i2s_reg_defaults[] = {
+ { SUN4I_I2S_CTRL_REG, 0x00000000 },
+ { SUN4I_I2S_FMT0_REG, 0x0000000c },
+ { SUN4I_I2S_FMT1_REG, 0x00004020 },
+ { SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
+ { SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
+ { SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
+ { SUN4I_I2S_TX_CHAN_SEL_REG, 0x00000001 },
+ { SUN4I_I2S_TX_CHAN_MAP_REG, 0x76543210 },
+ { SUN4I_I2S_RX_CHAN_SEL_REG, 0x00000001 },
+ { SUN4I_I2S_RX_CHAN_MAP_REG, 0x00003210 },
+};
+
+static const struct reg_default sun8i_i2s_reg_defaults[] = {
+ { SUN4I_I2S_CTRL_REG, 0x00060000 },
+ { SUN4I_I2S_FMT0_REG, 0x00000033 },
+ { SUN4I_I2S_FMT1_REG, 0x00000030 },
+ { SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
+ { SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
+ { SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
+ { SUN8I_I2S_CHAN_CFG_REG, 0x00000000 },
+ { SUN8I_I2S_TX_CHAN_SEL_REG, 0x00000000 },
+ { SUN8I_I2S_TX_CHAN_MAP_REG, 0x00000000 },
+ { SUN8I_I2S_RX_CHAN_SEL_REG, 0x00000000 },
+ { SUN8I_I2S_RX_CHAN_MAP_REG, 0x00000000 },
+};
+
+static const struct regmap_config sun4i_i2s_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = SUN4I_I2S_RX_CHAN_MAP_REG,
+
+ .cache_type = REGCACHE_FLAT,
+ .reg_defaults = sun4i_i2s_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(sun4i_i2s_reg_defaults),
+ .writeable_reg = sun4i_i2s_wr_reg,
+ .readable_reg = sun4i_i2s_rd_reg,
+ .volatile_reg = sun4i_i2s_volatile_reg,
+};
+
+static const struct regmap_config sun8i_i2s_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = SUN8I_I2S_RX_CHAN_MAP_REG,
+ .cache_type = REGCACHE_FLAT,
+ .reg_defaults = sun8i_i2s_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(sun8i_i2s_reg_defaults),
+ .writeable_reg = sun4i_i2s_wr_reg,
+ .readable_reg = sun8i_i2s_rd_reg,
+ .volatile_reg = sun8i_i2s_volatile_reg,
+};
+
+static int sun4i_i2s_runtime_resume(struct device *dev)
+{
+ struct sun4i_i2s *i2s = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(i2s->bus_clk);
+ if (ret) {
+ dev_err(dev, "Failed to enable bus clock\n");
+ return ret;
+ }
+
+ regcache_cache_only(i2s->regmap, false);
+ regcache_mark_dirty(i2s->regmap);
+
+ ret = regcache_sync(i2s->regmap);
+ if (ret) {
+ dev_err(dev, "Failed to sync regmap cache\n");
+ goto err_disable_clk;
+ }
+
+ return 0;
+
+err_disable_clk:
+ clk_disable_unprepare(i2s->bus_clk);
+ return ret;
+}
+
+static int sun4i_i2s_runtime_suspend(struct device *dev)
+{
+ struct sun4i_i2s *i2s = dev_get_drvdata(dev);
+
+ regcache_cache_only(i2s->regmap, true);
+
+ clk_disable_unprepare(i2s->bus_clk);
+
+ return 0;
+}
+
+static const struct sun4i_i2s_quirks sun4i_a10_i2s_quirks = {
+ .has_reset = false,
+ .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
+ .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
+ .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
+ .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
+ .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
+ .field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
+ .field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
+ .has_slave_select_bit = true,
+ .field_fmt_mode = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 1),
+ .field_txchanmap = REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
+ .field_rxchanmap = REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
+ .field_txchansel = REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
+ .field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
+};
+
+static const struct sun4i_i2s_quirks sun6i_a31_i2s_quirks = {
+ .has_reset = true,
+ .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
+ .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
+ .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
+ .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
+ .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
+ .field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
+ .field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
+ .has_slave_select_bit = true,
+ .field_fmt_mode = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 1),
+ .field_txchanmap = REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
+ .field_rxchanmap = REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
+ .field_txchansel = REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
+ .field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
+};
+
+static const struct sun4i_i2s_quirks sun8i_h3_i2s_quirks = {
+ .has_reset = true,
+ .reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
+ .sun4i_i2s_regmap = &sun8i_i2s_regmap_config,
+ .mclk_offset = 1,
+ .bclk_offset = 2,
+ .fmt_offset = 3,
+ .has_fmt_set_lrck_period = true,
+ .has_chcfg = true,
+ .has_chsel_tx_chen = true,
+ .has_chsel_offset = true,
+ .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 8, 8),
+ .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 2),
+ .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 6),
+ .field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
+ .field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 19, 19),
+ .field_fmt_mode = REG_FIELD(SUN4I_I2S_CTRL_REG, 4, 5),
+ .field_txchanmap = REG_FIELD(SUN8I_I2S_TX_CHAN_MAP_REG, 0, 31),
+ .field_rxchanmap = REG_FIELD(SUN8I_I2S_RX_CHAN_MAP_REG, 0, 31),
+ .field_txchansel = REG_FIELD(SUN8I_I2S_TX_CHAN_SEL_REG, 0, 2),
+ .field_rxchansel = REG_FIELD(SUN8I_I2S_RX_CHAN_SEL_REG, 0, 2),
+};
+
+static int sun4i_i2s_init_regmap_fields(struct device *dev,
+ struct sun4i_i2s *i2s)
+{
+ i2s->field_clkdiv_mclk_en =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_clkdiv_mclk_en);
+ if (IS_ERR(i2s->field_clkdiv_mclk_en))
+ return PTR_ERR(i2s->field_clkdiv_mclk_en);
+
+ i2s->field_fmt_wss =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_fmt_wss);
+ if (IS_ERR(i2s->field_fmt_wss))
+ return PTR_ERR(i2s->field_fmt_wss);
+
+ i2s->field_fmt_sr =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_fmt_sr);
+ if (IS_ERR(i2s->field_fmt_sr))
+ return PTR_ERR(i2s->field_fmt_sr);
+
+ i2s->field_fmt_bclk =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_fmt_bclk);
+ if (IS_ERR(i2s->field_fmt_bclk))
+ return PTR_ERR(i2s->field_fmt_bclk);
+
+ i2s->field_fmt_lrclk =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_fmt_lrclk);
+ if (IS_ERR(i2s->field_fmt_lrclk))
+ return PTR_ERR(i2s->field_fmt_lrclk);
+
+ i2s->field_fmt_mode =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_fmt_mode);
+ if (IS_ERR(i2s->field_fmt_mode))
+ return PTR_ERR(i2s->field_fmt_mode);
+
+ i2s->field_txchanmap =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_txchanmap);
+ if (IS_ERR(i2s->field_txchanmap))
+ return PTR_ERR(i2s->field_txchanmap);
+
+ i2s->field_rxchanmap =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_rxchanmap);
+ if (IS_ERR(i2s->field_rxchanmap))
+ return PTR_ERR(i2s->field_rxchanmap);
+
+ i2s->field_txchansel =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_txchansel);
+ if (IS_ERR(i2s->field_txchansel))
+ return PTR_ERR(i2s->field_txchansel);
+
+ i2s->field_rxchansel =
+ devm_regmap_field_alloc(dev, i2s->regmap,
+ i2s->variant->field_rxchansel);
+ return PTR_ERR_OR_ZERO(i2s->field_rxchansel);
+}
+
+static int sun4i_i2s_probe(struct platform_device *pdev)
+{
+ struct sun4i_i2s *i2s;
+ struct resource *res;
+ void __iomem *regs;
+ int irq, ret;
+
+ i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
+ if (!i2s)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, i2s);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(regs))
+ return PTR_ERR(regs);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "Can't retrieve our interrupt\n");
+ return irq;
+ }
+
+ i2s->variant = of_device_get_match_data(&pdev->dev);
+ if (!i2s->variant) {
+ dev_err(&pdev->dev, "Failed to determine the quirks to use\n");
+ return -ENODEV;
+ }
+
+ i2s->bus_clk = devm_clk_get(&pdev->dev, "apb");
+ if (IS_ERR(i2s->bus_clk)) {
+ dev_err(&pdev->dev, "Can't get our bus clock\n");
+ return PTR_ERR(i2s->bus_clk);
+ }
+
+ i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
+ i2s->variant->sun4i_i2s_regmap);
+ if (IS_ERR(i2s->regmap)) {
+ dev_err(&pdev->dev, "Regmap initialisation failed\n");
+ return PTR_ERR(i2s->regmap);
+ }
+
+ i2s->mod_clk = devm_clk_get(&pdev->dev, "mod");
+ if (IS_ERR(i2s->mod_clk)) {
+ dev_err(&pdev->dev, "Can't get our mod clock\n");
+ return PTR_ERR(i2s->mod_clk);
+ }
+
+ if (i2s->variant->has_reset) {
+ i2s->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
+ if (IS_ERR(i2s->rst)) {
+ dev_err(&pdev->dev, "Failed to get reset control\n");
+ return PTR_ERR(i2s->rst);
+ }
+ }
+
+ if (!IS_ERR(i2s->rst)) {
+ ret = reset_control_deassert(i2s->rst);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to deassert the reset control\n");
+ return -EINVAL;
+ }
+ }
+
+ i2s->playback_dma_data.addr = res->start +
+ i2s->variant->reg_offset_txdata;
+ i2s->playback_dma_data.maxburst = 8;
+
+ i2s->capture_dma_data.addr = res->start + SUN4I_I2S_FIFO_RX_REG;
+ i2s->capture_dma_data.maxburst = 8;
+
+ pm_runtime_enable(&pdev->dev);
+ if (!pm_runtime_enabled(&pdev->dev)) {
+ ret = sun4i_i2s_runtime_resume(&pdev->dev);
+ if (ret)
+ goto err_pm_disable;
+ }
+
+ ret = devm_snd_soc_register_component(&pdev->dev,
+ &sun4i_i2s_component,
+ &sun4i_i2s_dai, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not register DAI\n");
+ goto err_suspend;
+ }
+
+ ret = snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not register PCM\n");
+ goto err_suspend;
+ }
+
+ ret = sun4i_i2s_init_regmap_fields(&pdev->dev, i2s);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not initialise regmap fields\n");
+ goto err_suspend;
+ }
+
+ return 0;
+
+err_suspend:
+ if (!pm_runtime_status_suspended(&pdev->dev))
+ sun4i_i2s_runtime_suspend(&pdev->dev);
+err_pm_disable:
+ pm_runtime_disable(&pdev->dev);
+ if (!IS_ERR(i2s->rst))
+ reset_control_assert(i2s->rst);
+
+ return ret;
+}
+
+static int sun4i_i2s_remove(struct platform_device *pdev)
+{
+ struct sun4i_i2s *i2s = dev_get_drvdata(&pdev->dev);
+
+ snd_dmaengine_pcm_unregister(&pdev->dev);
+
+ pm_runtime_disable(&pdev->dev);
+ if (!pm_runtime_status_suspended(&pdev->dev))
+ sun4i_i2s_runtime_suspend(&pdev->dev);
+
+ if (!IS_ERR(i2s->rst))
+ reset_control_assert(i2s->rst);
+
+ return 0;
+}
+
+static const struct of_device_id sun4i_i2s_match[] = {
+ {
+ .compatible = "allwinner,sun4i-a10-i2s",
+ .data = &sun4i_a10_i2s_quirks,
+ },
+ {
+ .compatible = "allwinner,sun6i-a31-i2s",
+ .data = &sun6i_a31_i2s_quirks,
+ },
+ {
+ .compatible = "allwinner,sun8i-h3-i2s",
+ .data = &sun8i_h3_i2s_quirks,
+ },
+ {}
+};
+MODULE_DEVICE_TABLE(of, sun4i_i2s_match);
+
+static const struct dev_pm_ops sun4i_i2s_pm_ops = {
+ .runtime_resume = sun4i_i2s_runtime_resume,
+ .runtime_suspend = sun4i_i2s_runtime_suspend,
+};
+
+static struct platform_driver sun4i_i2s_driver = {
+ .probe = sun4i_i2s_probe,
+ .remove = sun4i_i2s_remove,
+ .driver = {
+ .name = "sun4i-i2s",
+ .of_match_table = sun4i_i2s_match,
+ .pm = &sun4i_i2s_pm_ops,
+ },
+};
+module_platform_driver(sun4i_i2s_driver);
+
+MODULE_AUTHOR("Andrea Venturi <be17068@iperbole.bo.it>");
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
+MODULE_DESCRIPTION("Allwinner A10 I2S driver");
+MODULE_LICENSE("GPL");