From 7f29222b1731e8182ba94a331531dec18865a1e4 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Sun, 27 Jul 2014 09:31:47 +0100 Subject: [PATCH 48/53] asoc: add mt7620 support Signed-off-by: John Crispin --- sound/soc/Kconfig | 1 + sound/soc/Makefile | 1 + sound/soc/ralink/Kconfig | 15 ++ sound/soc/ralink/Makefile | 11 + sound/soc/ralink/mt7620-i2s.c | 436 ++++++++++++++++++++++++++++++++++++++ sound/soc/ralink/mt7620-wm8960.c | 233 ++++++++++++++++++++ 7 files changed, 699 insertions(+) create mode 100644 sound/soc/ralink/Kconfig create mode 100644 sound/soc/ralink/Makefile create mode 100644 sound/soc/ralink/mt7620-i2s.c create mode 100644 sound/soc/ralink/mt7620-wm8960.c --- a/sound/soc/Kconfig +++ b/sound/soc/Kconfig @@ -99,6 +99,7 @@ source "sound/soc/mxs/Kconfig" source "sound/soc/pxa/Kconfig" source "sound/soc/qcom/Kconfig" source "sound/soc/rockchip/Kconfig" +source "sound/soc/ralink/Kconfig" source "sound/soc/samsung/Kconfig" source "sound/soc/sh/Kconfig" source "sound/soc/sof/Kconfig" --- a/sound/soc/Makefile +++ b/sound/soc/Makefile @@ -56,6 +56,7 @@ obj-$(CONFIG_SND_SOC) += kirkwood/ obj-$(CONFIG_SND_SOC) += pxa/ obj-$(CONFIG_SND_SOC) += qcom/ obj-$(CONFIG_SND_SOC) += rockchip/ +obj-$(CONFIG_SND_SOC) += ralink/ obj-$(CONFIG_SND_SOC) += samsung/ obj-$(CONFIG_SND_SOC) += sh/ obj-$(CONFIG_SND_SOC) += sof/ --- /dev/null +++ b/sound/soc/ralink/Kconfig @@ -0,0 +1,8 @@ +config SND_RALINK_SOC_I2S + depends on RALINK && SND_SOC && !SOC_RT288X + select SND_SOC_GENERIC_DMAENGINE_PCM + select REGMAP_MMIO + tristate "SoC Audio (I2S protocol) for Ralink SoC" + help + Say Y if you want to use I2S protocol and I2S codec on Ralink/MediaTek + based boards. --- /dev/null +++ b/sound/soc/ralink/Makefile @@ -0,0 +1,6 @@ +# +# Ralink/MediaTek Platform Support +# +snd-soc-ralink-i2s-objs := ralink-i2s.o + +obj-$(CONFIG_SND_RALINK_SOC_I2S) += snd-soc-ralink-i2s.o --- /dev/null +++ b/sound/soc/ralink/ralink-i2s.c @@ -0,0 +1,941 @@ +/* + * Copyright (C) 2010, Lars-Peter Clausen + * Copyright (C) 2016 Michael Lee + * + * 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. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define DRV_NAME "ralink-i2s" + +#define I2S_REG_CFG0 0x00 +#define I2S_REG_INT_STATUS 0x04 +#define I2S_REG_INT_EN 0x08 +#define I2S_REG_FF_STATUS 0x0c +#define I2S_REG_WREG 0x10 +#define I2S_REG_RREG 0x14 +#define I2S_REG_CFG1 0x18 +#define I2S_REG_DIVCMP 0x20 +#define I2S_REG_DIVINT 0x24 + +/* I2S_REG_CFG0 */ +#define I2S_REG_CFG0_EN BIT(31) +#define I2S_REG_CFG0_DMA_EN BIT(30) +#define I2S_REG_CFG0_BYTE_SWAP BIT(28) +#define I2S_REG_CFG0_TX_EN BIT(24) +#define I2S_REG_CFG0_RX_EN BIT(20) +#define I2S_REG_CFG0_SLAVE BIT(16) +#define I2S_REG_CFG0_RX_THRES 12 +#define I2S_REG_CFG0_TX_THRES 4 +#define I2S_REG_CFG0_THRES_MASK (0xf << I2S_REG_CFG0_RX_THRES) | \ + (4 << I2S_REG_CFG0_TX_THRES) +#define I2S_REG_CFG0_DFT_THRES (4 << I2S_REG_CFG0_RX_THRES) | \ + (4 << I2S_REG_CFG0_TX_THRES) +/* RT305x */ +#define I2S_REG_CFG0_CLK_DIS BIT(8) +#define I2S_REG_CFG0_TXCH_SWAP BIT(3) +#define I2S_REG_CFG0_TXCH1_OFF BIT(2) +#define I2S_REG_CFG0_TXCH0_OFF BIT(1) +#define I2S_REG_CFG0_SLAVE_EN BIT(0) +/* RT3883 */ +#define I2S_REG_CFG0_RXCH_SWAP BIT(11) +#define I2S_REG_CFG0_RXCH1_OFF BIT(10) +#define I2S_REG_CFG0_RXCH0_OFF BIT(9) +#define I2S_REG_CFG0_WS_INV BIT(0) +/* MT7628 */ +#define I2S_REG_CFG0_FMT_LE BIT(29) +#define I2S_REG_CFG0_SYS_BE BIT(28) +#define I2S_REG_CFG0_NORM_24 BIT(18) +#define I2S_REG_CFG0_DATA_24 BIT(17) + +/* I2S_REG_INT_STATUS */ +#define I2S_REG_INT_RX_FAULT BIT(7) +#define I2S_REG_INT_RX_OVRUN BIT(6) +#define I2S_REG_INT_RX_UNRUN BIT(5) +#define I2S_REG_INT_RX_THRES BIT(4) +#define I2S_REG_INT_TX_FAULT BIT(3) +#define I2S_REG_INT_TX_OVRUN BIT(2) +#define I2S_REG_INT_TX_UNRUN BIT(1) +#define I2S_REG_INT_TX_THRES BIT(0) +#define I2S_REG_INT_TX_MASK 0xf +#define I2S_REG_INT_RX_MASK 0xf0 + +/* I2S_REG_INT_STATUS */ +#define I2S_RX_AVCNT(x) ((x >> 4) & 0xf) +#define I2S_TX_AVCNT(x) (x & 0xf) +/* MT7628 */ +#define MT7628_I2S_RX_AVCNT(x) ((x >> 8) & 0x1f) +#define MT7628_I2S_TX_AVCNT(x) (x & 0x1f) + +/* I2S_REG_CFG1 */ +#define I2S_REG_CFG1_LBK BIT(31) +#define I2S_REG_CFG1_EXTLBK BIT(30) +/* RT3883 */ +#define I2S_REG_CFG1_LEFT_J BIT(0) +#define I2S_REG_CFG1_RIGHT_J BIT(1) +#define I2S_REG_CFG1_FMT_MASK 0x3 + +/* I2S_REG_DIVCMP */ +#define I2S_REG_DIVCMP_CLKEN BIT(31) +#define I2S_REG_DIVCMP_DIVCOMP_MASK 0x1ff + +/* I2S_REG_DIVINT */ +#define I2S_REG_DIVINT_MASK 0x3ff + +/* BCLK dividers */ +#define RALINK_I2S_DIVCMP 0 +#define RALINK_I2S_DIVINT 1 + +/* FIFO */ +#define RALINK_I2S_FIFO_SIZE 32 + +/* feature flags */ +#define RALINK_FLAGS_TXONLY BIT(0) +#define RALINK_FLAGS_LEFT_J BIT(1) +#define RALINK_FLAGS_RIGHT_J BIT(2) +#define RALINK_FLAGS_ENDIAN BIT(3) +#define RALINK_FLAGS_24BIT BIT(4) + +#define RALINK_I2S_INT_EN 0 + +struct ralink_i2s_stats { + u32 dmafault; + u32 overrun; + u32 underrun; + u32 belowthres; +}; + +struct ralink_i2s { + struct device *dev; + void __iomem *regs; + struct clk *clk; + struct regmap *regmap; + u32 flags; + unsigned int fmt; + u16 txdma_req; + u16 rxdma_req; + + struct snd_dmaengine_dai_dma_data playback_dma_data; + struct snd_dmaengine_dai_dma_data capture_dma_data; + + struct dentry *dbg_dir; + struct dentry *dbg_stats; + struct ralink_i2s_stats txstats; + struct ralink_i2s_stats rxstats; +}; + +static void ralink_i2s_dump_regs(struct ralink_i2s *i2s) +{ + u32 buf[10]; + int ret; + + ret = regmap_bulk_read(i2s->regmap, I2S_REG_CFG0, + buf, ARRAY_SIZE(buf)); + + dev_dbg(i2s->dev, "CFG0: %08x, INTSTAT: %08x, INTEN: %08x, " \ + "FFSTAT: %08x, WREG: %08x, RREG: %08x, " \ + "CFG1: %08x, DIVCMP: %08x, DIVINT: %08x\n", + buf[0], buf[1], buf[2], buf[3], buf[4], + buf[5], buf[6], buf[8], buf[9]); +} + +static int ralink_i2s_set_sysclk(struct snd_soc_dai *dai, + int clk_id, unsigned int freq, int dir) +{ + return 0; +} + +static int ralink_i2s_set_sys_bclk(struct snd_soc_dai *dai, int width, int rate) +{ + struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai); + unsigned long clk = clk_get_rate(i2s->clk); + int div; + uint32_t data; + + /* disable clock at slave mode */ + if ((i2s->fmt & SND_SOC_DAIFMT_MASTER_MASK) == + SND_SOC_DAIFMT_CBM_CFM) { + regmap_update_bits(i2s->regmap, I2S_REG_CFG0, + I2S_REG_CFG0_CLK_DIS, + I2S_REG_CFG0_CLK_DIS); + return 0; + } + + /* FREQOUT = FREQIN / (I2S_CLK_DIV + 1) */ + div = (clk / rate ) - 1; + + data = rt_sysc_r32(0x30); + data &= (0xff << 8); + data |= (0x1 << 15) | (div << 8); + rt_sysc_w32(data, 0x30); + + /* enable clock */ + regmap_update_bits(i2s->regmap, I2S_REG_CFG0, I2S_REG_CFG0_CLK_DIS, 0); + + dev_dbg(i2s->dev, "clk: %lu, rate: %u, div: %d\n", + clk, rate, div); + + return 0; +} + +static int ralink_i2s_set_bclk(struct snd_soc_dai *dai, int width, int rate) +{ + struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai); + unsigned long clk = clk_get_rate(i2s->clk); + int divint, divcomp; + + /* disable clock at slave mode */ + if ((i2s->fmt & SND_SOC_DAIFMT_MASTER_MASK) == + SND_SOC_DAIFMT_CBM_CFM) { + regmap_update_bits(i2s->regmap, I2S_REG_DIVCMP, + I2S_REG_DIVCMP_CLKEN, 0); + return 0; + } + + /* FREQOUT = FREQIN * (1/2) * (1/(DIVINT + DIVCOMP/512)) */ + clk = clk / (2 * 2 * width); + divint = clk / rate; + divcomp = ((clk % rate) * 512) / rate; + + if ((divint > I2S_REG_DIVINT_MASK) || + (divcomp > I2S_REG_DIVCMP_DIVCOMP_MASK)) + return -EINVAL; + + regmap_update_bits(i2s->regmap, I2S_REG_DIVINT, + I2S_REG_DIVINT_MASK, divint); + regmap_update_bits(i2s->regmap, I2S_REG_DIVCMP, + I2S_REG_DIVCMP_DIVCOMP_MASK, divcomp); + + /* enable clock */ + regmap_update_bits(i2s->regmap, I2S_REG_DIVCMP, I2S_REG_DIVCMP_CLKEN, + I2S_REG_DIVCMP_CLKEN); + + dev_dbg(i2s->dev, "clk: %lu, rate: %u, int: %d, comp: %d\n", + clk_get_rate(i2s->clk), rate, divint, divcomp); + + return 0; +} + +static int ralink_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai); + unsigned int cfg0 = 0, cfg1 = 0; + + /* set master/slave audio interface */ + switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBM_CFM: + if (i2s->flags & RALINK_FLAGS_TXONLY) + cfg0 |= I2S_REG_CFG0_SLAVE_EN; + else + cfg0 |= I2S_REG_CFG0_SLAVE; + break; + case SND_SOC_DAIFMT_CBS_CFS: + break; + default: + return -EINVAL; + } + + /* interface format */ + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_I2S: + break; + case SND_SOC_DAIFMT_RIGHT_J: + if (i2s->flags & RALINK_FLAGS_RIGHT_J) { + cfg1 |= I2S_REG_CFG1_RIGHT_J; + break; + } + return -EINVAL; + case SND_SOC_DAIFMT_LEFT_J: + if (i2s->flags & RALINK_FLAGS_LEFT_J) { + cfg1 |= I2S_REG_CFG1_LEFT_J; + break; + } + return -EINVAL; + default: + return -EINVAL; + } + + /* clock inversion */ + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + break; + default: + return -EINVAL; + } + + if (i2s->flags & RALINK_FLAGS_TXONLY) { + regmap_update_bits(i2s->regmap, I2S_REG_CFG0, + I2S_REG_CFG0_SLAVE_EN, cfg0); + } else { + regmap_update_bits(i2s->regmap, I2S_REG_CFG0, + I2S_REG_CFG0_SLAVE, cfg0); + } + regmap_update_bits(i2s->regmap, I2S_REG_CFG1, + I2S_REG_CFG1_FMT_MASK, cfg1); + i2s->fmt = fmt; + + return 0; +} + +static int ralink_i2s_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai); + + if (snd_soc_dai_active(dai)) + return 0; + + /* setup status interrupt */ +#if (RALINK_I2S_INT_EN) + regmap_write(i2s->regmap, I2S_REG_INT_EN, 0xff); +#else + regmap_write(i2s->regmap, I2S_REG_INT_EN, 0x0); +#endif + + /* enable */ + regmap_update_bits(i2s->regmap, I2S_REG_CFG0, + I2S_REG_CFG0_EN | I2S_REG_CFG0_DMA_EN | + I2S_REG_CFG0_THRES_MASK, + I2S_REG_CFG0_EN | I2S_REG_CFG0_DMA_EN | + I2S_REG_CFG0_DFT_THRES); + + return 0; +} + +static void ralink_i2s_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai); + + /* If both streams are stopped, disable module and clock */ + if (snd_soc_dai_active(dai)) + return; + + /* + * datasheet mention when disable all control regs are cleared + * to initial values. need reinit at startup. + */ + regmap_update_bits(i2s->regmap, I2S_REG_CFG0, I2S_REG_CFG0_EN, 0); +} + +static int ralink_i2s_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) +{ + struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai); + int width; + int ret; + + width = params_width(params); + switch (width) { + case 16: + if (i2s->flags & RALINK_FLAGS_24BIT) + regmap_update_bits(i2s->regmap, I2S_REG_CFG0, + I2S_REG_CFG0_DATA_24, 0); + break; + case 24: + if (i2s->flags & RALINK_FLAGS_24BIT) { + regmap_update_bits(i2s->regmap, I2S_REG_CFG0, + I2S_REG_CFG0_DATA_24, + I2S_REG_CFG0_DATA_24); + break; + } + return -EINVAL; + default: + return -EINVAL; + } + + switch (params_channels(params)) { + case 2: + break; + default: + return -EINVAL; + } + + if (i2s->flags & RALINK_FLAGS_ENDIAN) { + /* system endian */ +#ifdef SNDRV_LITTLE_ENDIAN + regmap_update_bits(i2s->regmap, I2S_REG_CFG0, + I2S_REG_CFG0_SYS_BE, 0); +#else + regmap_update_bits(i2s->regmap, I2S_REG_CFG0, + I2S_REG_CFG0_SYS_BE, + I2S_REG_CFG0_SYS_BE); +#endif + + /* data endian */ + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + case SNDRV_PCM_FORMAT_S24_LE: + regmap_update_bits(i2s->regmap, I2S_REG_CFG0, + I2S_REG_CFG0_FMT_LE, + I2S_REG_CFG0_FMT_LE); + break; + case SNDRV_PCM_FORMAT_S16_BE: + case SNDRV_PCM_FORMAT_S24_BE: + regmap_update_bits(i2s->regmap, I2S_REG_CFG0, + I2S_REG_CFG0_FMT_LE, 0); + break; + default: + return -EINVAL; + } + } + + /* setup bclk rate */ + if (i2s->flags & RALINK_FLAGS_TXONLY) + ret = ralink_i2s_set_sys_bclk(dai, width, params_rate(params)); + else + ret = ralink_i2s_set_bclk(dai, width, params_rate(params)); + + return ret; +} + +static int ralink_i2s_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai); + unsigned int mask, val; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + mask = I2S_REG_CFG0_TX_EN; + else + mask = I2S_REG_CFG0_RX_EN; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + val = mask; + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + val = 0; + break; + default: + return -EINVAL; + } + + regmap_update_bits(i2s->regmap, I2S_REG_CFG0, mask, val); + + return 0; +} + +static void ralink_i2s_init_dma_data(struct ralink_i2s *i2s, + struct resource *res) +{ + struct snd_dmaengine_dai_dma_data *dma_data; + + /* Playback */ + dma_data = &i2s->playback_dma_data; + dma_data->addr = res->start + I2S_REG_WREG; + dma_data->addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + dma_data->maxburst = 1; + + if (i2s->flags & RALINK_FLAGS_TXONLY) + return; + + /* Capture */ + dma_data = &i2s->capture_dma_data; + dma_data->addr = res->start + I2S_REG_RREG; + dma_data->addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + dma_data->maxburst = 1; +} + +static int ralink_i2s_dai_probe(struct snd_soc_dai *dai) +{ + struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai); + + snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data, + &i2s->capture_dma_data); + + return 0; +} + +static int ralink_i2s_dai_remove(struct snd_soc_dai *dai) +{ + return 0; +} + +static const struct snd_soc_dai_ops ralink_i2s_dai_ops = { + .set_sysclk = ralink_i2s_set_sysclk, + .set_fmt = ralink_i2s_set_fmt, + .startup = ralink_i2s_startup, + .shutdown = ralink_i2s_shutdown, + .hw_params = ralink_i2s_hw_params, + .trigger = ralink_i2s_trigger, + .probe = ralink_i2s_dai_probe, + .remove = ralink_i2s_dai_remove, +}; + +static struct snd_soc_dai_driver ralink_i2s_dai = { + .name = DRV_NAME, + .ops = &ralink_i2s_dai_ops, + .capture = { + .stream_name = "I2S Capture", + .channels_min = 2, + .channels_max = 2, + .rate_min = 5512, + .rate_max = 192000, + .rates = SNDRV_PCM_RATE_CONTINUOUS, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + }, + .playback = { + .stream_name = "I2S Playback", + .channels_min = 2, + .channels_max = 2, + .rate_min = 5512, + .rate_max = 192000, + .rates = SNDRV_PCM_RATE_CONTINUOUS, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + }, + .symmetric_rate = 1, +}; + +static struct snd_pcm_hardware ralink_pcm_hardware = { + .info = SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + .channels_min = 2, + .channels_max = 2, + .period_bytes_min = PAGE_SIZE, + .period_bytes_max = PAGE_SIZE * 2, + .periods_min = 2, + .periods_max = 128, + .buffer_bytes_max = 128 * 1024, + .fifo_size = RALINK_I2S_FIFO_SIZE, +}; + +static const struct snd_dmaengine_pcm_config ralink_dmaengine_pcm_config = { + .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, + .pcm_hardware = &ralink_pcm_hardware, + .prealloc_buffer_size = 256 * PAGE_SIZE, +}; + +static const struct snd_soc_component_driver ralink_i2s_component = { + .name = DRV_NAME, +}; + +static bool ralink_i2s_readable_reg(struct device *dev, unsigned int reg) +{ + return true; +} + +static bool ralink_i2s_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case I2S_REG_INT_STATUS: + case I2S_REG_FF_STATUS: + return true; + } + return false; +} + +static bool ralink_i2s_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case I2S_REG_FF_STATUS: + case I2S_REG_RREG: + return false; + } + return true; +} + +static const struct regmap_config ralink_i2s_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .writeable_reg = ralink_i2s_writeable_reg, + .readable_reg = ralink_i2s_readable_reg, + .volatile_reg = ralink_i2s_volatile_reg, + .max_register = I2S_REG_DIVINT, +}; + +#if (RALINK_I2S_INT_EN) +static irqreturn_t ralink_i2s_irq(int irq, void *devid) +{ + struct ralink_i2s *i2s = devid; + u32 status; + + regmap_read(i2s->regmap, I2S_REG_INT_STATUS, &status); + if (unlikely(!status)) + return IRQ_NONE; + + /* tx stats */ + if (status & I2S_REG_INT_TX_MASK) { + if (status & I2S_REG_INT_TX_THRES) + i2s->txstats.belowthres++; + if (status & I2S_REG_INT_TX_UNRUN) + i2s->txstats.underrun++; + if (status & I2S_REG_INT_TX_OVRUN) + i2s->txstats.overrun++; + if (status & I2S_REG_INT_TX_FAULT) + i2s->txstats.dmafault++; + } + + /* rx stats */ + if (status & I2S_REG_INT_RX_MASK) { + if (status & I2S_REG_INT_RX_THRES) + i2s->rxstats.belowthres++; + if (status & I2S_REG_INT_RX_UNRUN) + i2s->rxstats.underrun++; + if (status & I2S_REG_INT_RX_OVRUN) + i2s->rxstats.overrun++; + if (status & I2S_REG_INT_RX_FAULT) + i2s->rxstats.dmafault++; + } + + /* clean status bits */ + regmap_write(i2s->regmap, I2S_REG_INT_STATUS, status); + + return IRQ_HANDLED; +} +#endif + +#if IS_ENABLED(CONFIG_DEBUG_FS) +static int ralink_i2s_stats_show(struct seq_file *s, void *unused) +{ + struct ralink_i2s *i2s = s->private; + + seq_printf(s, "tx stats\n"); + seq_printf(s, "\tbelow threshold\t%u\n", i2s->txstats.belowthres); + seq_printf(s, "\tunder run\t%u\n", i2s->txstats.underrun); + seq_printf(s, "\tover run\t%u\n", i2s->txstats.overrun); + seq_printf(s, "\tdma fault\t%u\n", i2s->txstats.dmafault); + + seq_printf(s, "rx stats\n"); + seq_printf(s, "\tbelow threshold\t%u\n", i2s->rxstats.belowthres); + seq_printf(s, "\tunder run\t%u\n", i2s->rxstats.underrun); + seq_printf(s, "\tover run\t%u\n", i2s->rxstats.overrun); + seq_printf(s, "\tdma fault\t%u\n", i2s->rxstats.dmafault); + + ralink_i2s_dump_regs(i2s); + + return 0; +} + +static int ralink_i2s_stats_open(struct inode *inode, struct file *file) +{ + return single_open(file, ralink_i2s_stats_show, inode->i_private); +} + +static const struct file_operations ralink_i2s_stats_ops = { + .open = ralink_i2s_stats_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static inline int ralink_i2s_debugfs_create(struct ralink_i2s *i2s) +{ + i2s->dbg_dir = debugfs_create_dir(dev_name(i2s->dev), NULL); + if (!i2s->dbg_dir) + return -ENOMEM; + + i2s->dbg_stats = debugfs_create_file("stats", S_IRUGO, + i2s->dbg_dir, i2s, &ralink_i2s_stats_ops); + if (!i2s->dbg_stats) { + debugfs_remove(i2s->dbg_dir); + return -ENOMEM; + } + + return 0; +} + +static inline void ralink_i2s_debugfs_remove(struct ralink_i2s *i2s) +{ + debugfs_remove(i2s->dbg_stats); + debugfs_remove(i2s->dbg_dir); +} +#else +static inline int ralink_i2s_debugfs_create(struct ralink_i2s *i2s) +{ + return 0; +} + +static inline void ralink_i2s_debugfs_remove(struct ralink_i2s *i2s) +{ +} +#endif + +/* + * TODO: these refclk setup functions should use + * clock framework instead. hardcode it now. + */ +static void rt3350_refclk_setup(void) +{ + uint32_t data; + + /* set refclk output 12Mhz clock */ + data = rt_sysc_r32(0x2c); + data |= (0x1 << 8); + rt_sysc_w32(data, 0x2c); +} + +static void rt3883_refclk_setup(void) +{ + uint32_t data; + + /* set refclk output 12Mhz clock */ + data = rt_sysc_r32(0x2c); + data &= ~(0x3 << 13); + data |= (0x1 << 13); + rt_sysc_w32(data, 0x2c); +} + +static void rt3552_refclk_setup(void) +{ + uint32_t data; + + /* set refclk output 12Mhz clock */ + data = rt_sysc_r32(0x2c); + data &= ~(0xf << 8); + data |= (0x3 << 8); + rt_sysc_w32(data, 0x2c); +} + +static void mt7620_refclk_setup(void) +{ + uint32_t data; + + /* set refclk output 12Mhz clock */ + data = rt_sysc_r32(0x2c); + data &= ~(0x7 << 9); + data |= 0x1 << 9; + rt_sysc_w32(data, 0x2c); +} + +static void mt7621_refclk_setup(void) +{ + uint32_t data; + + /* set refclk output 12Mhz clock */ + data = rt_sysc_r32(0x2c); + data &= ~(0x1f << 18); + data |= (0x19 << 18); + data &= ~(0x1f << 12); + data |= (0x1 << 12); + data &= ~(0x7 << 9); + data |= (0x5 << 9); + rt_sysc_w32(data, 0x2c); +} + +static void mt7628_refclk_setup(void) +{ + uint32_t data; + + /* set i2s and refclk digital pad */ + data = rt_sysc_r32(0x3c); + data |= 0x1f; + rt_sysc_w32(data, 0x3c); + + /* Adjust REFCLK0's driving strength */ + data = rt_sysc_r32(0x1354); + data &= ~(0x1 << 5); + rt_sysc_w32(data, 0x1354); + data = rt_sysc_r32(0x1364); + data |= ~(0x1 << 5); + rt_sysc_w32(data, 0x1364); + + /* set refclk output 12Mhz clock */ + data = rt_sysc_r32(0x2c); + data &= ~(0x7 << 9); + data |= 0x1 << 9; + rt_sysc_w32(data, 0x2c); +} + +struct rt_i2s_data { + u32 flags; + void (*refclk_setup)(void); +}; + +struct rt_i2s_data rt3050_i2s_data = { .flags = RALINK_FLAGS_TXONLY }; +struct rt_i2s_data rt3350_i2s_data = { .flags = RALINK_FLAGS_TXONLY, + .refclk_setup = rt3350_refclk_setup }; +struct rt_i2s_data rt3883_i2s_data = { + .flags = (RALINK_FLAGS_LEFT_J | RALINK_FLAGS_RIGHT_J), + .refclk_setup = rt3883_refclk_setup }; +struct rt_i2s_data rt3352_i2s_data = { .refclk_setup = rt3552_refclk_setup}; +struct rt_i2s_data mt7620_i2s_data = { .refclk_setup = mt7620_refclk_setup}; +struct rt_i2s_data mt7621_i2s_data = { .refclk_setup = mt7621_refclk_setup}; +struct rt_i2s_data mt7628_i2s_data = { + .flags = (RALINK_FLAGS_ENDIAN | RALINK_FLAGS_24BIT | + RALINK_FLAGS_LEFT_J), + .refclk_setup = mt7628_refclk_setup}; + +static const struct of_device_id ralink_i2s_match_table[] = { + { .compatible = "ralink,rt3050-i2s", + .data = (void *)&rt3050_i2s_data }, + { .compatible = "ralink,rt3350-i2s", + .data = (void *)&rt3350_i2s_data }, + { .compatible = "ralink,rt3883-i2s", + .data = (void *)&rt3883_i2s_data }, + { .compatible = "ralink,rt3352-i2s", + .data = (void *)&rt3352_i2s_data }, + { .compatible = "mediatek,mt7620-i2s", + .data = (void *)&mt7620_i2s_data }, + { .compatible = "mediatek,mt7621-i2s", + .data = (void *)&mt7621_i2s_data }, + { .compatible = "mediatek,mt7628-i2s", + .data = (void *)&mt7628_i2s_data }, + {}, +}; +MODULE_DEVICE_TABLE(of, ralink_i2s_match_table); + +static int ralink_i2s_probe(struct platform_device *pdev) +{ + const struct of_device_id *match; + struct device_node *np = pdev->dev.of_node; + struct device *dev = &pdev->dev; + struct resource *res; + struct ralink_i2s *i2s; + int irq, ret; + u32 dma_req; + struct rt_i2s_data *data; + + i2s = devm_kzalloc(dev, sizeof(*i2s), GFP_KERNEL); + if (!i2s) + return -ENOMEM; + + i2s->dev = dev; + + match = of_match_device(ralink_i2s_match_table, dev); + if (!match) + return -EINVAL; + data = (struct rt_i2s_data *)match->data; + i2s->flags = data->flags; + /* setup out 12Mhz refclk to codec as mclk */ + if (data->refclk_setup) + data->refclk_setup(); + + if (of_property_read_u32(np, "txdma-req", &dma_req)) { + dev_err(dev, "no txdma-req define\n"); + return -EINVAL; + } + i2s->txdma_req = (u16)dma_req; + if (!(i2s->flags & RALINK_FLAGS_TXONLY)) { + if (of_property_read_u32(np, "rxdma-req", &dma_req)) { + dev_err(dev, "no rxdma-req define\n"); + return -EINVAL; + } + i2s->rxdma_req = (u16)dma_req; + } + + i2s->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res); + if (IS_ERR(i2s->regs)) + return PTR_ERR(i2s->regs); + + i2s->regmap = devm_regmap_init_mmio(dev, i2s->regs, + &ralink_i2s_regmap_config); + if (IS_ERR(i2s->regmap)) + return dev_err_probe(dev, PTR_ERR(i2s->regmap), "regmap init failed"); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(dev, "failed to get irq\n"); + return -EINVAL; + } + +#if (RALINK_I2S_INT_EN) + ret = devm_request_irq(dev, irq, ralink_i2s_irq, + 0, dev_name(dev), i2s); + if (ret) + return dev_err_probe(dev, ret, "failed to request irq"); +#endif + + i2s->clk = devm_clk_get_enabled(dev, NULL); + if (IS_ERR(i2s->clk)) + return dev_err_probe(dev, PTR_ERR(i2s->clk), "no clock defined"); + + ralink_i2s_init_dma_data(i2s, res); + + ret = device_reset(dev); + if (ret) + return dev_err_probe(dev, ret, "failed to reset device\n"); + + /* enable 24bits support */ + if (i2s->flags & RALINK_FLAGS_24BIT) { + ralink_i2s_dai.capture.formats |= SNDRV_PCM_FMTBIT_S24_LE; + ralink_i2s_dai.playback.formats |= SNDRV_PCM_FMTBIT_S24_LE; + } + + /* enable big endian support */ + if (i2s->flags & RALINK_FLAGS_ENDIAN) { + ralink_i2s_dai.capture.formats |= SNDRV_PCM_FMTBIT_S16_BE; + ralink_i2s_dai.playback.formats |= SNDRV_PCM_FMTBIT_S16_BE; + ralink_pcm_hardware.formats |= SNDRV_PCM_FMTBIT_S16_BE; + if (i2s->flags & RALINK_FLAGS_24BIT) { + ralink_i2s_dai.capture.formats |= + SNDRV_PCM_FMTBIT_S24_BE; + ralink_i2s_dai.playback.formats |= + SNDRV_PCM_FMTBIT_S24_BE; + ralink_pcm_hardware.formats |= + SNDRV_PCM_FMTBIT_S24_BE; + } + } + + /* disable capture support */ + if (i2s->flags & RALINK_FLAGS_TXONLY) + memset(&ralink_i2s_dai.capture, sizeof(ralink_i2s_dai.capture), + 0); + + ret = devm_snd_soc_register_component(dev, &ralink_i2s_component, + &ralink_i2s_dai, 1); + if (ret) + return ret; + + ret = devm_snd_dmaengine_pcm_register(dev, + &ralink_dmaengine_pcm_config, + SND_DMAENGINE_PCM_FLAG_COMPAT); + if (ret) + return ret; + + dev_info(i2s->dev, "mclk %luMHz\n", clk_get_rate(i2s->clk) / 1000000); + + platform_set_drvdata(pdev, i2s); + return ralink_i2s_debugfs_create(i2s); +} + +static int ralink_i2s_remove(struct platform_device *pdev) +{ + struct ralink_i2s *i2s = platform_get_drvdata(pdev); + + ralink_i2s_debugfs_remove(i2s); + + return 0; +} + +static struct platform_driver ralink_i2s_driver = { + .probe = ralink_i2s_probe, + .remove = ralink_i2s_remove, + .driver = { + .name = DRV_NAME, + .of_match_table = ralink_i2s_match_table, + }, +}; +module_platform_driver(ralink_i2s_driver); + +MODULE_AUTHOR("Lars-Peter Clausen, "); +MODULE_DESCRIPTION("Ralink/MediaTek I2S driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRV_NAME);