diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/soc/fsl/fsl_micfil.c | 835 |
1 files changed, 835 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_micfil.c b/sound/soc/fsl/fsl_micfil.c new file mode 100644 index 000000000..97f83c63e --- /dev/null +++ b/sound/soc/fsl/fsl_micfil.c @@ -0,0 +1,835 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright 2018 NXP + +#include <linux/clk.h> +#include <linux/device.h> +#include <linux/interrupt.h> +#include <linux/kobject.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/of_platform.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/sysfs.h> +#include <linux/types.h> +#include <sound/dmaengine_pcm.h> +#include <sound/pcm.h> +#include <sound/soc.h> +#include <sound/tlv.h> +#include <sound/core.h> + +#include "fsl_micfil.h" +#include "imx-pcm.h" + +#define FSL_MICFIL_RATES SNDRV_PCM_RATE_8000_48000 +#define FSL_MICFIL_FORMATS (SNDRV_PCM_FMTBIT_S16_LE) + +struct fsl_micfil { + struct platform_device *pdev; + struct regmap *regmap; + const struct fsl_micfil_soc_data *soc; + struct clk *mclk; + struct snd_dmaengine_dai_dma_data dma_params_rx; + unsigned int dataline; + char name[32]; + int irq[MICFIL_IRQ_LINES]; + unsigned int mclk_streams; + int quality; /*QUALITY 2-0 bits */ + bool slave_mode; + int channel_gain[8]; +}; + +struct fsl_micfil_soc_data { + unsigned int fifos; + unsigned int fifo_depth; + unsigned int dataline; + bool imx; +}; + +static struct fsl_micfil_soc_data fsl_micfil_imx8mm = { + .imx = true, + .fifos = 8, + .fifo_depth = 8, + .dataline = 0xf, +}; + +static const struct of_device_id fsl_micfil_dt_ids[] = { + { .compatible = "fsl,imx8mm-micfil", .data = &fsl_micfil_imx8mm }, + {} +}; +MODULE_DEVICE_TABLE(of, fsl_micfil_dt_ids); + +/* Table 5. Quality Modes + * Medium 0 0 0 + * High 0 0 1 + * Very Low 2 1 0 0 + * Very Low 1 1 0 1 + * Very Low 0 1 1 0 + * Low 1 1 1 + */ +static const char * const micfil_quality_select_texts[] = { + "Medium", "High", + "N/A", "N/A", + "VLow2", "VLow1", + "VLow0", "Low", +}; + +static const struct soc_enum fsl_micfil_quality_enum = + SOC_ENUM_SINGLE(REG_MICFIL_CTRL2, + MICFIL_CTRL2_QSEL_SHIFT, + ARRAY_SIZE(micfil_quality_select_texts), + micfil_quality_select_texts); + +static DECLARE_TLV_DB_SCALE(gain_tlv, 0, 100, 0); + +static const struct snd_kcontrol_new fsl_micfil_snd_controls[] = { + SOC_SINGLE_SX_TLV("CH0 Volume", REG_MICFIL_OUT_CTRL, + MICFIL_OUTGAIN_CHX_SHIFT(0), 0x8, 0xF, gain_tlv), + SOC_SINGLE_SX_TLV("CH1 Volume", REG_MICFIL_OUT_CTRL, + MICFIL_OUTGAIN_CHX_SHIFT(1), 0x8, 0xF, gain_tlv), + SOC_SINGLE_SX_TLV("CH2 Volume", REG_MICFIL_OUT_CTRL, + MICFIL_OUTGAIN_CHX_SHIFT(2), 0x8, 0xF, gain_tlv), + SOC_SINGLE_SX_TLV("CH3 Volume", REG_MICFIL_OUT_CTRL, + MICFIL_OUTGAIN_CHX_SHIFT(3), 0x8, 0xF, gain_tlv), + SOC_SINGLE_SX_TLV("CH4 Volume", REG_MICFIL_OUT_CTRL, + MICFIL_OUTGAIN_CHX_SHIFT(4), 0x8, 0xF, gain_tlv), + SOC_SINGLE_SX_TLV("CH5 Volume", REG_MICFIL_OUT_CTRL, + MICFIL_OUTGAIN_CHX_SHIFT(5), 0x8, 0xF, gain_tlv), + SOC_SINGLE_SX_TLV("CH6 Volume", REG_MICFIL_OUT_CTRL, + MICFIL_OUTGAIN_CHX_SHIFT(6), 0x8, 0xF, gain_tlv), + SOC_SINGLE_SX_TLV("CH7 Volume", REG_MICFIL_OUT_CTRL, + MICFIL_OUTGAIN_CHX_SHIFT(7), 0x8, 0xF, gain_tlv), + SOC_ENUM_EXT("MICFIL Quality Select", + fsl_micfil_quality_enum, + snd_soc_get_enum_double, snd_soc_put_enum_double), +}; + +static inline int get_pdm_clk(struct fsl_micfil *micfil, + unsigned int rate) +{ + u32 ctrl2_reg; + int qsel, osr; + int bclk; + + regmap_read(micfil->regmap, REG_MICFIL_CTRL2, &ctrl2_reg); + osr = 16 - ((ctrl2_reg & MICFIL_CTRL2_CICOSR_MASK) + >> MICFIL_CTRL2_CICOSR_SHIFT); + + regmap_read(micfil->regmap, REG_MICFIL_CTRL2, &ctrl2_reg); + qsel = ctrl2_reg & MICFIL_CTRL2_QSEL_MASK; + + switch (qsel) { + case MICFIL_HIGH_QUALITY: + bclk = rate * 8 * osr / 2; /* kfactor = 0.5 */ + break; + case MICFIL_MEDIUM_QUALITY: + case MICFIL_VLOW0_QUALITY: + bclk = rate * 4 * osr * 1; /* kfactor = 1 */ + break; + case MICFIL_LOW_QUALITY: + case MICFIL_VLOW1_QUALITY: + bclk = rate * 2 * osr * 2; /* kfactor = 2 */ + break; + case MICFIL_VLOW2_QUALITY: + bclk = rate * osr * 4; /* kfactor = 4 */ + break; + default: + dev_err(&micfil->pdev->dev, + "Please make sure you select a valid quality.\n"); + bclk = -1; + break; + } + + return bclk; +} + +static inline int get_clk_div(struct fsl_micfil *micfil, + unsigned int rate) +{ + u32 ctrl2_reg; + long mclk_rate; + int clk_div; + + regmap_read(micfil->regmap, REG_MICFIL_CTRL2, &ctrl2_reg); + + mclk_rate = clk_get_rate(micfil->mclk); + + clk_div = mclk_rate / (get_pdm_clk(micfil, rate) * 2); + + return clk_div; +} + +/* The SRES is a self-negated bit which provides the CPU with the + * capability to initialize the PDM Interface module through the + * slave-bus interface. This bit always reads as zero, and this + * bit is only effective when MDIS is cleared + */ +static int fsl_micfil_reset(struct device *dev) +{ + struct fsl_micfil *micfil = dev_get_drvdata(dev); + int ret; + + ret = regmap_update_bits(micfil->regmap, + REG_MICFIL_CTRL1, + MICFIL_CTRL1_MDIS_MASK, + 0); + if (ret) { + dev_err(dev, "failed to clear MDIS bit %d\n", ret); + return ret; + } + + ret = regmap_update_bits(micfil->regmap, + REG_MICFIL_CTRL1, + MICFIL_CTRL1_SRES_MASK, + MICFIL_CTRL1_SRES); + if (ret) { + dev_err(dev, "failed to reset MICFIL: %d\n", ret); + return ret; + } + + /* + * SRES is self-cleared bit, but REG_MICFIL_CTRL1 is defined + * as non-volatile register, so SRES still remain in regmap + * cache after set, that every update of REG_MICFIL_CTRL1, + * software reset happens. so clear it explicitly. + */ + ret = regmap_clear_bits(micfil->regmap, REG_MICFIL_CTRL1, + MICFIL_CTRL1_SRES); + if (ret) + return ret; + + /* + * Set SRES should clear CHnF flags, But even add delay here + * the CHnF may not be cleared sometimes, so clear CHnF explicitly. + */ + ret = regmap_write_bits(micfil->regmap, REG_MICFIL_STAT, 0xFF, 0xFF); + if (ret) + return ret; + + return 0; +} + +static int fsl_micfil_set_mclk_rate(struct fsl_micfil *micfil, + unsigned int freq) +{ + struct device *dev = &micfil->pdev->dev; + int ret; + + clk_disable_unprepare(micfil->mclk); + + ret = clk_set_rate(micfil->mclk, freq * 1024); + if (ret) + dev_warn(dev, "failed to set rate (%u): %d\n", + freq * 1024, ret); + + clk_prepare_enable(micfil->mclk); + + return ret; +} + +static int fsl_micfil_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai); + + if (!micfil) { + dev_err(dai->dev, "micfil dai priv_data not set\n"); + return -EINVAL; + } + + return 0; +} + +static int fsl_micfil_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai); + struct device *dev = &micfil->pdev->dev; + int ret; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + ret = fsl_micfil_reset(dev); + if (ret) { + dev_err(dev, "failed to soft reset\n"); + return ret; + } + + /* DMA Interrupt Selection - DISEL bits + * 00 - DMA and IRQ disabled + * 01 - DMA req enabled + * 10 - IRQ enabled + * 11 - reserved + */ + ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1, + MICFIL_CTRL1_DISEL_MASK, + (1 << MICFIL_CTRL1_DISEL_SHIFT)); + if (ret) { + dev_err(dev, "failed to update DISEL bits\n"); + return ret; + } + + /* Enable the module */ + ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1, + MICFIL_CTRL1_PDMIEN_MASK, + MICFIL_CTRL1_PDMIEN); + if (ret) { + dev_err(dev, "failed to enable the module\n"); + return ret; + } + + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + /* Disable the module */ + ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1, + MICFIL_CTRL1_PDMIEN_MASK, + 0); + if (ret) { + dev_err(dev, "failed to enable the module\n"); + return ret; + } + + ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1, + MICFIL_CTRL1_DISEL_MASK, + (0 << MICFIL_CTRL1_DISEL_SHIFT)); + if (ret) { + dev_err(dev, "failed to update DISEL bits\n"); + return ret; + } + break; + default: + return -EINVAL; + } + return 0; +} + +static int fsl_set_clock_params(struct device *dev, unsigned int rate) +{ + struct fsl_micfil *micfil = dev_get_drvdata(dev); + int clk_div; + int ret; + + ret = fsl_micfil_set_mclk_rate(micfil, rate); + if (ret < 0) + dev_err(dev, "failed to set mclk[%lu] to rate %u\n", + clk_get_rate(micfil->mclk), rate); + + /* set CICOSR */ + ret |= regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL2, + MICFIL_CTRL2_CICOSR_MASK, + MICFIL_CTRL2_OSR_DEFAULT); + if (ret) + dev_err(dev, "failed to set CICOSR in reg 0x%X\n", + REG_MICFIL_CTRL2); + + /* set CLK_DIV */ + clk_div = get_clk_div(micfil, rate); + if (clk_div < 0) + ret = -EINVAL; + + ret |= regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL2, + MICFIL_CTRL2_CLKDIV_MASK, clk_div); + if (ret) + dev_err(dev, "failed to set CLKDIV in reg 0x%X\n", + REG_MICFIL_CTRL2); + + return ret; +} + +static int fsl_micfil_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai); + unsigned int channels = params_channels(params); + unsigned int rate = params_rate(params); + struct device *dev = &micfil->pdev->dev; + int ret; + + /* 1. Disable the module */ + ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1, + MICFIL_CTRL1_PDMIEN_MASK, 0); + if (ret) { + dev_err(dev, "failed to disable the module\n"); + return ret; + } + + /* enable channels */ + ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1, + 0xFF, ((1 << channels) - 1)); + if (ret) { + dev_err(dev, "failed to enable channels %d, reg 0x%X\n", ret, + REG_MICFIL_CTRL1); + return ret; + } + + ret = fsl_set_clock_params(dev, rate); + if (ret < 0) { + dev_err(dev, "Failed to set clock parameters [%d]\n", ret); + return ret; + } + + micfil->dma_params_rx.maxburst = channels * MICFIL_DMA_MAXBURST_RX; + + return 0; +} + +static int fsl_micfil_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id, + unsigned int freq, int dir) +{ + struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai); + struct device *dev = &micfil->pdev->dev; + + int ret; + + if (!freq) + return 0; + + ret = fsl_micfil_set_mclk_rate(micfil, freq); + if (ret < 0) + dev_err(dev, "failed to set mclk[%lu] to rate %u\n", + clk_get_rate(micfil->mclk), freq); + + return ret; +} + +static struct snd_soc_dai_ops fsl_micfil_dai_ops = { + .startup = fsl_micfil_startup, + .trigger = fsl_micfil_trigger, + .hw_params = fsl_micfil_hw_params, + .set_sysclk = fsl_micfil_set_dai_sysclk, +}; + +static int fsl_micfil_dai_probe(struct snd_soc_dai *cpu_dai) +{ + struct fsl_micfil *micfil = dev_get_drvdata(cpu_dai->dev); + struct device *dev = cpu_dai->dev; + unsigned int val; + int ret; + int i; + + /* set qsel to medium */ + ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL2, + MICFIL_CTRL2_QSEL_MASK, MICFIL_MEDIUM_QUALITY); + if (ret) { + dev_err(dev, "failed to set quality mode bits, reg 0x%X\n", + REG_MICFIL_CTRL2); + return ret; + } + + /* set default gain to max_gain */ + regmap_write(micfil->regmap, REG_MICFIL_OUT_CTRL, 0x77777777); + for (i = 0; i < 8; i++) + micfil->channel_gain[i] = 0xF; + + snd_soc_dai_init_dma_data(cpu_dai, NULL, + &micfil->dma_params_rx); + + /* FIFO Watermark Control - FIFOWMK*/ + val = MICFIL_FIFO_CTRL_FIFOWMK(micfil->soc->fifo_depth) - 1; + ret = regmap_update_bits(micfil->regmap, REG_MICFIL_FIFO_CTRL, + MICFIL_FIFO_CTRL_FIFOWMK_MASK, + val); + if (ret) { + dev_err(dev, "failed to set FIFOWMK\n"); + return ret; + } + + snd_soc_dai_set_drvdata(cpu_dai, micfil); + + return 0; +} + +static struct snd_soc_dai_driver fsl_micfil_dai = { + .probe = fsl_micfil_dai_probe, + .capture = { + .stream_name = "CPU-Capture", + .channels_min = 1, + .channels_max = 8, + .rates = FSL_MICFIL_RATES, + .formats = FSL_MICFIL_FORMATS, + }, + .ops = &fsl_micfil_dai_ops, +}; + +static const struct snd_soc_component_driver fsl_micfil_component = { + .name = "fsl-micfil-dai", + .controls = fsl_micfil_snd_controls, + .num_controls = ARRAY_SIZE(fsl_micfil_snd_controls), + +}; + +/* REGMAP */ +static const struct reg_default fsl_micfil_reg_defaults[] = { + {REG_MICFIL_CTRL1, 0x00000000}, + {REG_MICFIL_CTRL2, 0x00000000}, + {REG_MICFIL_STAT, 0x00000000}, + {REG_MICFIL_FIFO_CTRL, 0x00000007}, + {REG_MICFIL_FIFO_STAT, 0x00000000}, + {REG_MICFIL_DATACH0, 0x00000000}, + {REG_MICFIL_DATACH1, 0x00000000}, + {REG_MICFIL_DATACH2, 0x00000000}, + {REG_MICFIL_DATACH3, 0x00000000}, + {REG_MICFIL_DATACH4, 0x00000000}, + {REG_MICFIL_DATACH5, 0x00000000}, + {REG_MICFIL_DATACH6, 0x00000000}, + {REG_MICFIL_DATACH7, 0x00000000}, + {REG_MICFIL_DC_CTRL, 0x00000000}, + {REG_MICFIL_OUT_CTRL, 0x00000000}, + {REG_MICFIL_OUT_STAT, 0x00000000}, + {REG_MICFIL_VAD0_CTRL1, 0x00000000}, + {REG_MICFIL_VAD0_CTRL2, 0x000A0000}, + {REG_MICFIL_VAD0_STAT, 0x00000000}, + {REG_MICFIL_VAD0_SCONFIG, 0x00000000}, + {REG_MICFIL_VAD0_NCONFIG, 0x80000000}, + {REG_MICFIL_VAD0_NDATA, 0x00000000}, + {REG_MICFIL_VAD0_ZCD, 0x00000004}, +}; + +static bool fsl_micfil_readable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case REG_MICFIL_CTRL1: + case REG_MICFIL_CTRL2: + case REG_MICFIL_STAT: + case REG_MICFIL_FIFO_CTRL: + case REG_MICFIL_FIFO_STAT: + case REG_MICFIL_DATACH0: + case REG_MICFIL_DATACH1: + case REG_MICFIL_DATACH2: + case REG_MICFIL_DATACH3: + case REG_MICFIL_DATACH4: + case REG_MICFIL_DATACH5: + case REG_MICFIL_DATACH6: + case REG_MICFIL_DATACH7: + case REG_MICFIL_DC_CTRL: + case REG_MICFIL_OUT_CTRL: + case REG_MICFIL_OUT_STAT: + case REG_MICFIL_VAD0_CTRL1: + case REG_MICFIL_VAD0_CTRL2: + case REG_MICFIL_VAD0_STAT: + case REG_MICFIL_VAD0_SCONFIG: + case REG_MICFIL_VAD0_NCONFIG: + case REG_MICFIL_VAD0_NDATA: + case REG_MICFIL_VAD0_ZCD: + return true; + default: + return false; + } +} + +static bool fsl_micfil_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case REG_MICFIL_CTRL1: + case REG_MICFIL_CTRL2: + case REG_MICFIL_STAT: /* Write 1 to Clear */ + case REG_MICFIL_FIFO_CTRL: + case REG_MICFIL_FIFO_STAT: /* Write 1 to Clear */ + case REG_MICFIL_DC_CTRL: + case REG_MICFIL_OUT_CTRL: + case REG_MICFIL_OUT_STAT: /* Write 1 to Clear */ + case REG_MICFIL_VAD0_CTRL1: + case REG_MICFIL_VAD0_CTRL2: + case REG_MICFIL_VAD0_STAT: /* Write 1 to Clear */ + case REG_MICFIL_VAD0_SCONFIG: + case REG_MICFIL_VAD0_NCONFIG: + case REG_MICFIL_VAD0_ZCD: + return true; + default: + return false; + } +} + +static bool fsl_micfil_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case REG_MICFIL_STAT: + case REG_MICFIL_DATACH0: + case REG_MICFIL_DATACH1: + case REG_MICFIL_DATACH2: + case REG_MICFIL_DATACH3: + case REG_MICFIL_DATACH4: + case REG_MICFIL_DATACH5: + case REG_MICFIL_DATACH6: + case REG_MICFIL_DATACH7: + case REG_MICFIL_VAD0_STAT: + case REG_MICFIL_VAD0_NDATA: + return true; + default: + return false; + } +} + +static const struct regmap_config fsl_micfil_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + + .max_register = REG_MICFIL_VAD0_ZCD, + .reg_defaults = fsl_micfil_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(fsl_micfil_reg_defaults), + .readable_reg = fsl_micfil_readable_reg, + .volatile_reg = fsl_micfil_volatile_reg, + .writeable_reg = fsl_micfil_writeable_reg, + .cache_type = REGCACHE_RBTREE, +}; + +/* END OF REGMAP */ + +static irqreturn_t micfil_isr(int irq, void *devid) +{ + struct fsl_micfil *micfil = (struct fsl_micfil *)devid; + struct platform_device *pdev = micfil->pdev; + u32 stat_reg; + u32 fifo_stat_reg; + u32 ctrl1_reg; + bool dma_enabled; + int i; + + regmap_read(micfil->regmap, REG_MICFIL_STAT, &stat_reg); + regmap_read(micfil->regmap, REG_MICFIL_CTRL1, &ctrl1_reg); + regmap_read(micfil->regmap, REG_MICFIL_FIFO_STAT, &fifo_stat_reg); + + dma_enabled = MICFIL_DMA_ENABLED(ctrl1_reg); + + /* Channel 0-7 Output Data Flags */ + for (i = 0; i < MICFIL_OUTPUT_CHANNELS; i++) { + if (stat_reg & MICFIL_STAT_CHXF_MASK(i)) + dev_dbg(&pdev->dev, + "Data available in Data Channel %d\n", i); + /* if DMA is not enabled, field must be written with 1 + * to clear + */ + if (!dma_enabled) + regmap_write_bits(micfil->regmap, + REG_MICFIL_STAT, + MICFIL_STAT_CHXF_MASK(i), + 1); + } + + for (i = 0; i < MICFIL_FIFO_NUM; i++) { + if (fifo_stat_reg & MICFIL_FIFO_STAT_FIFOX_OVER_MASK(i)) + dev_dbg(&pdev->dev, + "FIFO Overflow Exception flag for channel %d\n", + i); + + if (fifo_stat_reg & MICFIL_FIFO_STAT_FIFOX_UNDER_MASK(i)) + dev_dbg(&pdev->dev, + "FIFO Underflow Exception flag for channel %d\n", + i); + } + + return IRQ_HANDLED; +} + +static irqreturn_t micfil_err_isr(int irq, void *devid) +{ + struct fsl_micfil *micfil = (struct fsl_micfil *)devid; + struct platform_device *pdev = micfil->pdev; + u32 stat_reg; + + regmap_read(micfil->regmap, REG_MICFIL_STAT, &stat_reg); + + if (stat_reg & MICFIL_STAT_BSY_FIL_MASK) + dev_dbg(&pdev->dev, "isr: Decimation Filter is running\n"); + + if (stat_reg & MICFIL_STAT_FIR_RDY_MASK) + dev_dbg(&pdev->dev, "isr: FIR Filter Data ready\n"); + + if (stat_reg & MICFIL_STAT_LOWFREQF_MASK) { + dev_dbg(&pdev->dev, "isr: ipg_clk_app is too low\n"); + regmap_write_bits(micfil->regmap, REG_MICFIL_STAT, + MICFIL_STAT_LOWFREQF_MASK, 1); + } + + return IRQ_HANDLED; +} + +static int fsl_micfil_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + const struct of_device_id *of_id; + struct fsl_micfil *micfil; + struct resource *res; + void __iomem *regs; + int ret, i; + unsigned long irqflag = 0; + + micfil = devm_kzalloc(&pdev->dev, sizeof(*micfil), GFP_KERNEL); + if (!micfil) + return -ENOMEM; + + micfil->pdev = pdev; + strncpy(micfil->name, np->name, sizeof(micfil->name) - 1); + + of_id = of_match_device(fsl_micfil_dt_ids, &pdev->dev); + if (!of_id || !of_id->data) + return -EINVAL; + + micfil->soc = of_id->data; + + /* ipg_clk is used to control the registers + * ipg_clk_app is used to operate the filter + */ + micfil->mclk = devm_clk_get(&pdev->dev, "ipg_clk_app"); + if (IS_ERR(micfil->mclk)) { + dev_err(&pdev->dev, "failed to get core clock: %ld\n", + PTR_ERR(micfil->mclk)); + return PTR_ERR(micfil->mclk); + } + + /* init regmap */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + micfil->regmap = devm_regmap_init_mmio_clk(&pdev->dev, + "ipg_clk", + regs, + &fsl_micfil_regmap_config); + if (IS_ERR(micfil->regmap)) { + dev_err(&pdev->dev, "failed to init MICFIL regmap: %ld\n", + PTR_ERR(micfil->regmap)); + return PTR_ERR(micfil->regmap); + } + + /* dataline mask for RX */ + ret = of_property_read_u32_index(np, + "fsl,dataline", + 0, + &micfil->dataline); + if (ret) + micfil->dataline = 1; + + if (micfil->dataline & ~micfil->soc->dataline) { + dev_err(&pdev->dev, "dataline setting error, Mask is 0x%X\n", + micfil->soc->dataline); + return -EINVAL; + } + + /* get IRQs */ + for (i = 0; i < MICFIL_IRQ_LINES; i++) { + micfil->irq[i] = platform_get_irq(pdev, i); + dev_err(&pdev->dev, "GET IRQ: %d\n", micfil->irq[i]); + if (micfil->irq[i] < 0) + return micfil->irq[i]; + } + + if (of_property_read_bool(np, "fsl,shared-interrupt")) + irqflag = IRQF_SHARED; + + /* Digital Microphone interface interrupt */ + ret = devm_request_irq(&pdev->dev, micfil->irq[0], + micfil_isr, irqflag, + micfil->name, micfil); + if (ret) { + dev_err(&pdev->dev, "failed to claim mic interface irq %u\n", + micfil->irq[0]); + return ret; + } + + /* Digital Microphone interface error interrupt */ + ret = devm_request_irq(&pdev->dev, micfil->irq[1], + micfil_err_isr, irqflag, + micfil->name, micfil); + if (ret) { + dev_err(&pdev->dev, "failed to claim mic interface error irq %u\n", + micfil->irq[1]); + return ret; + } + + micfil->dma_params_rx.chan_name = "rx"; + micfil->dma_params_rx.addr = res->start + REG_MICFIL_DATACH0; + micfil->dma_params_rx.maxburst = MICFIL_DMA_MAXBURST_RX; + + + platform_set_drvdata(pdev, micfil); + + pm_runtime_enable(&pdev->dev); + + ret = devm_snd_soc_register_component(&pdev->dev, &fsl_micfil_component, + &fsl_micfil_dai, 1); + if (ret) { + dev_err(&pdev->dev, "failed to register component %s\n", + fsl_micfil_component.name); + return ret; + } + + ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0); + if (ret) + dev_err(&pdev->dev, "failed to pcm register\n"); + + return ret; +} + +static int __maybe_unused fsl_micfil_runtime_suspend(struct device *dev) +{ + struct fsl_micfil *micfil = dev_get_drvdata(dev); + + regcache_cache_only(micfil->regmap, true); + + clk_disable_unprepare(micfil->mclk); + + return 0; +} + +static int __maybe_unused fsl_micfil_runtime_resume(struct device *dev) +{ + struct fsl_micfil *micfil = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(micfil->mclk); + if (ret < 0) + return ret; + + regcache_cache_only(micfil->regmap, false); + regcache_mark_dirty(micfil->regmap); + regcache_sync(micfil->regmap); + + return 0; +} + +static int __maybe_unused fsl_micfil_suspend(struct device *dev) +{ + pm_runtime_force_suspend(dev); + + return 0; +} + +static int __maybe_unused fsl_micfil_resume(struct device *dev) +{ + pm_runtime_force_resume(dev); + + return 0; +} + +static const struct dev_pm_ops fsl_micfil_pm_ops = { + SET_RUNTIME_PM_OPS(fsl_micfil_runtime_suspend, + fsl_micfil_runtime_resume, + NULL) + SET_SYSTEM_SLEEP_PM_OPS(fsl_micfil_suspend, + fsl_micfil_resume) +}; + +static struct platform_driver fsl_micfil_driver = { + .probe = fsl_micfil_probe, + .driver = { + .name = "fsl-micfil-dai", + .pm = &fsl_micfil_pm_ops, + .of_match_table = fsl_micfil_dt_ids, + }, +}; +module_platform_driver(fsl_micfil_driver); + +MODULE_AUTHOR("Cosmin-Gabriel Samoila <cosmin.samoila@nxp.com>"); +MODULE_DESCRIPTION("NXP PDM Microphone Interface (MICFIL) driver"); +MODULE_LICENSE("GPL v2"); |