diff options
Diffstat (limited to 'sound/soc/dwc/dwc-i2s.c')
| -rw-r--r-- | sound/soc/dwc/dwc-i2s.c | 1115 |
1 files changed, 1115 insertions, 0 deletions
diff --git a/sound/soc/dwc/dwc-i2s.c b/sound/soc/dwc/dwc-i2s.c new file mode 100644 index 0000000000..9ea4be56d3 --- /dev/null +++ b/sound/soc/dwc/dwc-i2s.c @@ -0,0 +1,1115 @@ +/* + * ALSA SoC Synopsys I2S Audio Layer + * + * sound/soc/dwc/designware_i2s.c + * + * Copyright (C) 2010 ST Microelectronics + * Rajeev Kumar <rajeevkumar.linux@gmail.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/clk.h> +#include <linux/device.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/interrupt.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/reset.h> +#include <linux/slab.h> +#include <linux/pm_runtime.h> +#include <sound/designware_i2s.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/dmaengine_pcm.h> +#include "local.h" + +static inline void i2s_write_reg(void __iomem *io_base, int reg, u32 val) +{ + writel(val, io_base + reg); +} + +static inline u32 i2s_read_reg(void __iomem *io_base, int reg) +{ + return readl(io_base + reg); +} + +static inline void i2s_disable_channels(struct dw_i2s_dev *dev, u32 stream) +{ + u32 i = 0; + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + for (i = 0; i < 4; i++) + i2s_write_reg(dev->i2s_base, TER(i), 0); + } else { + for (i = 0; i < 4; i++) + i2s_write_reg(dev->i2s_base, RER(i), 0); + } +} + +static inline void i2s_clear_irqs(struct dw_i2s_dev *dev, u32 stream) +{ + u32 i = 0; + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + for (i = 0; i < 4; i++) + i2s_read_reg(dev->i2s_base, TOR(i)); + } else { + for (i = 0; i < 4; i++) + i2s_read_reg(dev->i2s_base, ROR(i)); + } +} + +static inline void i2s_disable_irqs(struct dw_i2s_dev *dev, u32 stream, + int chan_nr) +{ + u32 i, irq; + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + for (i = 0; i < (chan_nr / 2); i++) { + irq = i2s_read_reg(dev->i2s_base, IMR(i)); + i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x30); + } + } else { + for (i = 0; i < (chan_nr / 2); i++) { + irq = i2s_read_reg(dev->i2s_base, IMR(i)); + i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x03); + } + } +} + +static inline void i2s_enable_irqs(struct dw_i2s_dev *dev, u32 stream, + int chan_nr) +{ + u32 i, irq; + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + for (i = 0; i < (chan_nr / 2); i++) { + irq = i2s_read_reg(dev->i2s_base, IMR(i)); + i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x30); + } + } else { + for (i = 0; i < (chan_nr / 2); i++) { + irq = i2s_read_reg(dev->i2s_base, IMR(i)); + i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x03); + } + } +} + +static irqreturn_t i2s_irq_handler(int irq, void *dev_id) +{ + struct dw_i2s_dev *dev = dev_id; + bool irq_valid = false; + u32 isr[4]; + int i; + + for (i = 0; i < 4; i++) + isr[i] = i2s_read_reg(dev->i2s_base, ISR(i)); + + i2s_clear_irqs(dev, SNDRV_PCM_STREAM_PLAYBACK); + i2s_clear_irqs(dev, SNDRV_PCM_STREAM_CAPTURE); + + for (i = 0; i < 4; i++) { + /* + * Check if TX fifo is empty. If empty fill FIFO with samples + * NOTE: Only two channels supported + */ + if ((isr[i] & ISR_TXFE) && (i == 0) && dev->use_pio) { + dw_pcm_push_tx(dev); + irq_valid = true; + } + + /* + * Data available. Retrieve samples from FIFO + * NOTE: Only two channels supported + */ + if ((isr[i] & ISR_RXDA) && (i == 0) && dev->use_pio) { + dw_pcm_pop_rx(dev); + irq_valid = true; + } + + /* Error Handling: TX */ + if (isr[i] & ISR_TXFO) { + dev_err_ratelimited(dev->dev, "TX overrun (ch_id=%d)\n", i); + irq_valid = true; + } + + /* Error Handling: TX */ + if (isr[i] & ISR_RXFO) { + dev_err_ratelimited(dev->dev, "RX overrun (ch_id=%d)\n", i); + irq_valid = true; + } + } + + if (irq_valid) + return IRQ_HANDLED; + else + return IRQ_NONE; +} + +static void i2s_enable_dma(struct dw_i2s_dev *dev, u32 stream) +{ + u32 dma_reg = i2s_read_reg(dev->i2s_base, I2S_DMACR); + + /* Enable DMA handshake for stream */ + if (stream == SNDRV_PCM_STREAM_PLAYBACK) + dma_reg |= I2S_DMAEN_TXBLOCK; + else + dma_reg |= I2S_DMAEN_RXBLOCK; + + i2s_write_reg(dev->i2s_base, I2S_DMACR, dma_reg); +} + +static void i2s_disable_dma(struct dw_i2s_dev *dev, u32 stream) +{ + u32 dma_reg = i2s_read_reg(dev->i2s_base, I2S_DMACR); + + /* Disable DMA handshake for stream */ + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + dma_reg &= ~I2S_DMAEN_TXBLOCK; + i2s_write_reg(dev->i2s_base, I2S_RTXDMA, 1); + } else { + dma_reg &= ~I2S_DMAEN_RXBLOCK; + i2s_write_reg(dev->i2s_base, I2S_RRXDMA, 1); + } + i2s_write_reg(dev->i2s_base, I2S_DMACR, dma_reg); +} + +static void i2s_start(struct dw_i2s_dev *dev, + struct snd_pcm_substream *substream) +{ + struct i2s_clk_config_data *config = &dev->config; + + u32 reg = IER_IEN; + + if (dev->tdm_slots) { + reg |= (dev->tdm_slots - 1) << IER_TDM_SLOTS_SHIFT; + reg |= IER_INTF_TYPE; + reg |= dev->frame_offset << IER_FRAME_OFF_SHIFT; + } + + i2s_write_reg(dev->i2s_base, IER, reg); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + i2s_write_reg(dev->i2s_base, ITER, 1); + else + i2s_write_reg(dev->i2s_base, IRER, 1); + + /* I2S needs to enable IRQ to make a handshake with DMAC on the JH7110 SoC */ + if (dev->use_pio || dev->is_jh7110) + i2s_enable_irqs(dev, substream->stream, config->chan_nr); + else + i2s_enable_dma(dev, substream->stream); + + i2s_write_reg(dev->i2s_base, CER, 1); +} + +static void i2s_stop(struct dw_i2s_dev *dev, + struct snd_pcm_substream *substream) +{ + + i2s_clear_irqs(dev, substream->stream); + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + i2s_write_reg(dev->i2s_base, ITER, 0); + else + i2s_write_reg(dev->i2s_base, IRER, 0); + + if (dev->use_pio || dev->is_jh7110) + i2s_disable_irqs(dev, substream->stream, 8); + else + i2s_disable_dma(dev, substream->stream); + + if (!dev->active) { + i2s_write_reg(dev->i2s_base, CER, 0); + i2s_write_reg(dev->i2s_base, IER, 0); + } +} + +static int dw_i2s_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *cpu_dai) +{ + struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai); + + if (dev->is_jh7110) { + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_soc_dai_link *dai_link = rtd->dai_link; + + dai_link->trigger_stop = SND_SOC_TRIGGER_ORDER_LDC; + } + + return 0; +} + +static void dw_i2s_config(struct dw_i2s_dev *dev, int stream) +{ + u32 ch_reg; + struct i2s_clk_config_data *config = &dev->config; + + + i2s_disable_channels(dev, stream); + + for (ch_reg = 0; ch_reg < (config->chan_nr / 2); ch_reg++) { + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + i2s_write_reg(dev->i2s_base, TCR(ch_reg), + dev->xfer_resolution); + i2s_write_reg(dev->i2s_base, TFCR(ch_reg), + dev->fifo_th - 1); + i2s_write_reg(dev->i2s_base, TER(ch_reg), TER_TXCHEN | + dev->tdm_mask << TER_TXSLOT_SHIFT); + } else { + i2s_write_reg(dev->i2s_base, RCR(ch_reg), + dev->xfer_resolution); + i2s_write_reg(dev->i2s_base, RFCR(ch_reg), + dev->fifo_th - 1); + i2s_write_reg(dev->i2s_base, RER(ch_reg), RER_RXCHEN | + dev->tdm_mask << RER_RXSLOT_SHIFT); + } + + } +} + +static int dw_i2s_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) +{ + struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); + struct i2s_clk_config_data *config = &dev->config; + int ret; + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + config->data_width = 16; + dev->ccr = 0x00; + dev->xfer_resolution = 0x02; + break; + + case SNDRV_PCM_FORMAT_S24_LE: + config->data_width = 24; + dev->ccr = 0x08; + dev->xfer_resolution = 0x04; + break; + + case SNDRV_PCM_FORMAT_S32_LE: + config->data_width = 32; + dev->ccr = 0x10; + dev->xfer_resolution = 0x05; + break; + + default: + dev_err(dev->dev, "designware-i2s: unsupported PCM fmt"); + return -EINVAL; + } + + if (dev->tdm_slots) + config->data_width = 32; + + config->chan_nr = params_channels(params); + + switch (config->chan_nr) { + case EIGHT_CHANNEL_SUPPORT: + case SIX_CHANNEL_SUPPORT: + case FOUR_CHANNEL_SUPPORT: + case TWO_CHANNEL_SUPPORT: + break; + default: + dev_err(dev->dev, "channel not supported\n"); + return -EINVAL; + } + + dw_i2s_config(dev, substream->stream); + + i2s_write_reg(dev->i2s_base, CCR, dev->ccr); + + config->sample_rate = params_rate(params); + + if (dev->capability & DW_I2S_MASTER) { + if (dev->i2s_clk_cfg) { + ret = dev->i2s_clk_cfg(config); + if (ret < 0) { + dev_err(dev->dev, "runtime audio clk config fail\n"); + return ret; + } + } else { + u32 bitclk = config->sample_rate * + config->data_width * 2; + + ret = clk_set_rate(dev->clk, bitclk); + if (ret) { + dev_err(dev->dev, "Can't set I2S clock rate: %d\n", + ret); + return ret; + } + } + } + return 0; +} + +static int dw_i2s_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + i2s_write_reg(dev->i2s_base, TXFFR, 1); + else + i2s_write_reg(dev->i2s_base, RXFFR, 1); + + return 0; +} + +static int dw_i2s_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); + int ret = 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + dev->active++; + i2s_start(dev, substream); + break; + + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + dev->active--; + i2s_stop(dev, substream); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int dw_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) +{ + struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai); + int ret = 0; + + switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { + case SND_SOC_DAIFMT_BC_FC: + if (dev->capability & DW_I2S_SLAVE) + ret = 0; + else + ret = -EINVAL; + break; + case SND_SOC_DAIFMT_BP_FP: + if (dev->capability & DW_I2S_MASTER) + ret = 0; + else + ret = -EINVAL; + break; + case SND_SOC_DAIFMT_BC_FP: + case SND_SOC_DAIFMT_BP_FC: + ret = -EINVAL; + break; + default: + dev_dbg(dev->dev, "dwc : Invalid clock provider format\n"); + ret = -EINVAL; + break; + } + + 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; + case SND_SOC_DAIFMT_DSP_A: + dev->frame_offset = 1; + break; + case SND_SOC_DAIFMT_DSP_B: + dev->frame_offset = 0; + break; + default: + dev_err(dev->dev, "DAI format unsupported"); + return -EINVAL; + } + + return ret; +} + +static int dw_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai, unsigned int tx_mask, + unsigned int rx_mask, int slots, int slot_width) +{ + struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai); + + if (slot_width != 32) + return -EINVAL; + + if (slots < 0 || slots > 16) + return -EINVAL; + + if (rx_mask != tx_mask) + return -EINVAL; + + if (!rx_mask) + return -EINVAL; + + dev->tdm_slots = slots; + dev->tdm_mask = rx_mask; + + dev->l_reg = RSLOT_TSLOT(ffs(rx_mask) - 1); + dev->r_reg = RSLOT_TSLOT(fls(rx_mask) - 1); + + return 0; +} + +static int dw_i2s_dai_probe(struct snd_soc_dai *dai) +{ + struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai); + + snd_soc_dai_init_dma_data(dai, &dev->play_dma_data, &dev->capture_dma_data); + return 0; +} + +static const struct snd_soc_dai_ops dw_i2s_dai_ops = { + .probe = dw_i2s_dai_probe, + .startup = dw_i2s_startup, + .hw_params = dw_i2s_hw_params, + .prepare = dw_i2s_prepare, + .trigger = dw_i2s_trigger, + .set_fmt = dw_i2s_set_fmt, + .set_tdm_slot = dw_i2s_set_tdm_slot, +}; + +#ifdef CONFIG_PM +static int dw_i2s_runtime_suspend(struct device *dev) +{ + struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev); + + if (dw_dev->capability & DW_I2S_MASTER) + clk_disable(dw_dev->clk); + return 0; +} + +static int dw_i2s_runtime_resume(struct device *dev) +{ + struct dw_i2s_dev *dw_dev = dev_get_drvdata(dev); + int ret; + + if (dw_dev->capability & DW_I2S_MASTER) { + ret = clk_enable(dw_dev->clk); + if (ret) + return ret; + } + return 0; +} + +static int dw_i2s_suspend(struct snd_soc_component *component) +{ + struct dw_i2s_dev *dev = snd_soc_component_get_drvdata(component); + + if (dev->capability & DW_I2S_MASTER) + clk_disable(dev->clk); + return 0; +} + +static int dw_i2s_resume(struct snd_soc_component *component) +{ + struct dw_i2s_dev *dev = snd_soc_component_get_drvdata(component); + struct snd_soc_dai *dai; + int stream, ret; + + if (dev->capability & DW_I2S_MASTER) { + ret = clk_enable(dev->clk); + if (ret) + return ret; + } + + for_each_component_dais(component, dai) { + for_each_pcm_streams(stream) + if (snd_soc_dai_stream_active(dai, stream)) + dw_i2s_config(dev, stream); + } + + return 0; +} + +#else +#define dw_i2s_suspend NULL +#define dw_i2s_resume NULL +#endif + +static const struct snd_soc_component_driver dw_i2s_component = { + .name = "dw-i2s", + .suspend = dw_i2s_suspend, + .resume = dw_i2s_resume, + .legacy_dai_naming = 1, +}; + +/* + * The following tables allow a direct lookup of various parameters + * defined in the I2S block's configuration in terms of sound system + * parameters. Each table is sized to the number of entries possible + * according to the number of configuration bits describing an I2S + * block parameter. + */ + +/* Maximum bit resolution of a channel - not uniformly spaced */ +static const u32 fifo_width[COMP_MAX_WORDSIZE] = { + 12, 16, 20, 24, 32, 0, 0, 0 +}; + +/* Width of (DMA) bus */ +static const u32 bus_widths[COMP_MAX_DATA_WIDTH] = { + DMA_SLAVE_BUSWIDTH_1_BYTE, + DMA_SLAVE_BUSWIDTH_2_BYTES, + DMA_SLAVE_BUSWIDTH_4_BYTES, + DMA_SLAVE_BUSWIDTH_UNDEFINED +}; + +/* PCM format to support channel resolution */ +static const u32 formats[COMP_MAX_WORDSIZE] = { + SNDRV_PCM_FMTBIT_S16_LE, + SNDRV_PCM_FMTBIT_S16_LE, + SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, + SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, + SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE, + 0, + 0, + 0 +}; + +static int dw_configure_dai(struct dw_i2s_dev *dev, + struct snd_soc_dai_driver *dw_i2s_dai, + unsigned int rates) +{ + /* + * Read component parameter registers to extract + * the I2S block's configuration. + */ + u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1); + u32 comp2 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp2); + u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1)); + u32 idx; + + if (dev->capability & DWC_I2S_RECORD && + dev->quirks & DW_I2S_QUIRK_COMP_PARAM1) + comp1 = comp1 & ~BIT(5); + + if (dev->capability & DWC_I2S_PLAY && + dev->quirks & DW_I2S_QUIRK_COMP_PARAM1) + comp1 = comp1 & ~BIT(6); + + if (COMP1_TX_ENABLED(comp1)) { + dev_dbg(dev->dev, " designware: play supported\n"); + idx = COMP1_TX_WORDSIZE_0(comp1); + if (WARN_ON(idx >= ARRAY_SIZE(formats))) + return -EINVAL; + if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE) + idx = 1; + dw_i2s_dai->playback.channels_min = MIN_CHANNEL_NUM; + dw_i2s_dai->playback.channels_max = + 1 << (COMP1_TX_CHANNELS(comp1) + 1); + dw_i2s_dai->playback.formats = formats[idx]; + dw_i2s_dai->playback.rates = rates; + } + + if (COMP1_RX_ENABLED(comp1)) { + dev_dbg(dev->dev, "designware: record supported\n"); + idx = COMP2_RX_WORDSIZE_0(comp2); + if (WARN_ON(idx >= ARRAY_SIZE(formats))) + return -EINVAL; + if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE) + idx = 1; + dw_i2s_dai->capture.channels_min = MIN_CHANNEL_NUM; + dw_i2s_dai->capture.channels_max = + 1 << (COMP1_RX_CHANNELS(comp1) + 1); + dw_i2s_dai->capture.formats = formats[idx]; + dw_i2s_dai->capture.rates = rates; + } + + if (COMP1_MODE_EN(comp1)) { + dev_dbg(dev->dev, "designware: i2s master mode supported\n"); + dev->capability |= DW_I2S_MASTER; + } else { + dev_dbg(dev->dev, "designware: i2s slave mode supported\n"); + dev->capability |= DW_I2S_SLAVE; + } + + dev->fifo_th = fifo_depth / 2; + return 0; +} + +static int dw_configure_dai_by_pd(struct dw_i2s_dev *dev, + struct snd_soc_dai_driver *dw_i2s_dai, + struct resource *res, + const struct i2s_platform_data *pdata) +{ + u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1); + u32 idx = COMP1_APB_DATA_WIDTH(comp1); + int ret; + + if (WARN_ON(idx >= ARRAY_SIZE(bus_widths))) + return -EINVAL; + + ret = dw_configure_dai(dev, dw_i2s_dai, pdata->snd_rates); + if (ret < 0) + return ret; + + if (dev->quirks & DW_I2S_QUIRK_16BIT_IDX_OVERRIDE) + idx = 1; + + if (dev->is_jh7110) { + /* Use platform data and snd_dmaengine_dai_dma_data struct at the same time */ + u32 comp2 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_2); + u32 idx2; + + if (COMP1_TX_ENABLED(comp1)) { + idx2 = COMP1_TX_WORDSIZE_0(comp1); + dev->play_dma_data.dt.addr = res->start + I2S_TXDMA; + dev->play_dma_data.dt.fifo_size = dev->fifo_th * 2 * + (fifo_width[idx2]) >> 8; + dev->play_dma_data.dt.maxburst = 16; + } + if (COMP1_RX_ENABLED(comp1)) { + idx2 = COMP2_RX_WORDSIZE_0(comp2); + dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA; + dev->capture_dma_data.dt.fifo_size = dev->fifo_th * 2 * + (fifo_width[idx2] >> 8); + dev->capture_dma_data.dt.maxburst = 16; + } + } else { + /* Set DMA slaves info */ + dev->play_dma_data.pd.data = pdata->play_dma_data; + dev->capture_dma_data.pd.data = pdata->capture_dma_data; + dev->play_dma_data.pd.addr = res->start + I2S_TXDMA; + dev->capture_dma_data.pd.addr = res->start + I2S_RXDMA; + dev->play_dma_data.pd.max_burst = 16; + dev->capture_dma_data.pd.max_burst = 16; + dev->play_dma_data.pd.addr_width = bus_widths[idx]; + dev->capture_dma_data.pd.addr_width = bus_widths[idx]; + dev->play_dma_data.pd.filter = pdata->filter; + dev->capture_dma_data.pd.filter = pdata->filter; + } + + return 0; +} + +static int dw_configure_dai_by_dt(struct dw_i2s_dev *dev, + struct snd_soc_dai_driver *dw_i2s_dai, + struct resource *res) +{ + u32 comp1 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_1); + u32 comp2 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_2); + u32 fifo_depth = 1 << (1 + COMP1_FIFO_DEPTH_GLOBAL(comp1)); + u32 idx2; + int ret; + + ret = dw_configure_dai(dev, dw_i2s_dai, SNDRV_PCM_RATE_8000_192000); + if (ret < 0) + return ret; + + if (COMP1_TX_ENABLED(comp1)) { + idx2 = COMP1_TX_WORDSIZE_0(comp1); + + dev->capability |= DWC_I2S_PLAY; + dev->play_dma_data.dt.addr = res->start + I2S_TXDMA; + dev->play_dma_data.dt.fifo_size = fifo_depth * + (fifo_width[idx2]) >> 8; + dev->play_dma_data.dt.maxburst = 16; + } + if (COMP1_RX_ENABLED(comp1)) { + idx2 = COMP2_RX_WORDSIZE_0(comp2); + + dev->capability |= DWC_I2S_RECORD; + dev->capture_dma_data.dt.addr = res->start + I2S_RXDMA; + dev->capture_dma_data.dt.fifo_size = fifo_depth * + (fifo_width[idx2] >> 8); + dev->capture_dma_data.dt.maxburst = 16; + } + + return 0; + +} + +#ifdef CONFIG_OF +/* clocks initialization with master mode on JH7110 SoC */ +static int jh7110_i2s_crg_master_init(struct dw_i2s_dev *dev) +{ + static struct clk_bulk_data clks[] = { + { .id = "mclk" }, + { .id = "mclk_ext" }, + { .id = "mclk_inner" }, + { .id = "apb" }, + { .id = "i2sclk" }, + }; + struct reset_control *resets = devm_reset_control_array_get_exclusive(dev->dev); + int ret; + struct clk *pclk; + struct clk *bclk_mst; + struct clk *mclk; + struct clk *mclk_ext; + struct clk *mclk_inner; + + if (IS_ERR(resets)) + return dev_err_probe(dev->dev, PTR_ERR(resets), "failed to get i2s resets\n"); + + ret = clk_bulk_get(dev->dev, ARRAY_SIZE(clks), clks); + if (ret) + return dev_err_probe(dev->dev, ret, "failed to get i2s clocks\n"); + + mclk = clks[0].clk; + mclk_ext = clks[1].clk; + mclk_inner = clks[2].clk; + pclk = clks[3].clk; + bclk_mst = clks[4].clk; + + ret = clk_prepare_enable(pclk); + if (ret) + goto exit; + + /* Use inner mclk first and avoid uninitialized gpio for external mclk */ + ret = clk_set_parent(mclk, mclk_inner); + if (ret) + goto err_dis_pclk; + + ret = clk_prepare_enable(bclk_mst); + if (ret) + goto err_dis_pclk; + + /* deassert resets before set clock parent */ + ret = reset_control_deassert(resets); + if (ret) + goto err_dis_all; + + /* external clock (12.288MHz) for Audio */ + ret = clk_set_parent(mclk, mclk_ext); + if (ret) + goto err_dis_all; + + /* i2sclk will be got and enabled repeatedly later and should be disabled now. */ + clk_disable_unprepare(bclk_mst); + clk_bulk_put(ARRAY_SIZE(clks), clks); + dev->is_jh7110 = true; + + return 0; + +err_dis_all: + clk_disable_unprepare(bclk_mst); +err_dis_pclk: + clk_disable_unprepare(pclk); +exit: + clk_bulk_put(ARRAY_SIZE(clks), clks); + return ret; +} + +/* clocks initialization with slave mode on JH7110 SoC */ +static int jh7110_i2s_crg_slave_init(struct dw_i2s_dev *dev) +{ + static struct clk_bulk_data clks[] = { + { .id = "mclk" }, + { .id = "mclk_ext" }, + { .id = "apb" }, + { .id = "bclk_ext" }, + { .id = "lrck_ext" }, + { .id = "bclk" }, + { .id = "lrck" }, + { .id = "mclk_inner" }, + { .id = "i2sclk" }, + }; + struct reset_control *resets = devm_reset_control_array_get_exclusive(dev->dev); + int ret; + struct clk *pclk; + struct clk *bclk_mst; + struct clk *bclk_ext; + struct clk *lrck_ext; + struct clk *bclk; + struct clk *lrck; + struct clk *mclk; + struct clk *mclk_ext; + struct clk *mclk_inner; + + if (IS_ERR(resets)) + return dev_err_probe(dev->dev, PTR_ERR(resets), "failed to get i2s resets\n"); + + ret = clk_bulk_get(dev->dev, ARRAY_SIZE(clks), clks); + if (ret) + return dev_err_probe(dev->dev, ret, "failed to get i2s clocks\n"); + + mclk = clks[0].clk; + mclk_ext = clks[1].clk; + pclk = clks[2].clk; + bclk_ext = clks[3].clk; + lrck_ext = clks[4].clk; + bclk = clks[5].clk; + lrck = clks[6].clk; + mclk_inner = clks[7].clk; + bclk_mst = clks[8].clk; + + ret = clk_prepare_enable(pclk); + if (ret) + goto exit; + + ret = clk_set_parent(mclk, mclk_inner); + if (ret) + goto err_dis_pclk; + + ret = clk_prepare_enable(bclk_mst); + if (ret) + goto err_dis_pclk; + + ret = reset_control_deassert(resets); + if (ret) + goto err_dis_all; + + /* The sources of BCLK and LRCK are the external codec. */ + ret = clk_set_parent(bclk, bclk_ext); + if (ret) + goto err_dis_all; + + ret = clk_set_parent(lrck, lrck_ext); + if (ret) + goto err_dis_all; + + ret = clk_set_parent(mclk, mclk_ext); + if (ret) + goto err_dis_all; + + /* The i2sclk will be got and enabled repeatedly later and should be disabled now. */ + clk_disable_unprepare(bclk_mst); + clk_bulk_put(ARRAY_SIZE(clks), clks); + dev->is_jh7110 = true; + + return 0; + +err_dis_all: + clk_disable_unprepare(bclk_mst); +err_dis_pclk: + clk_disable_unprepare(pclk); +exit: + clk_bulk_put(ARRAY_SIZE(clks), clks); + return ret; +} + +/* Special syscon initialization about RX channel with slave mode on JH7110 SoC */ +static int jh7110_i2srx_crg_init(struct dw_i2s_dev *dev) +{ + struct regmap *regmap; + unsigned int args[2]; + + regmap = syscon_regmap_lookup_by_phandle_args(dev->dev->of_node, + "starfive,syscon", + 2, args); + if (IS_ERR(regmap)) + return dev_err_probe(dev->dev, PTR_ERR(regmap), "getting the regmap failed\n"); + + /* Enable I2Srx with syscon register, args[0]: offset, args[1]: mask */ + regmap_update_bits(regmap, args[0], args[1], args[1]); + + return jh7110_i2s_crg_slave_init(dev); +} + +static int jh7110_i2stx0_clk_cfg(struct i2s_clk_config_data *config) +{ + struct dw_i2s_dev *dev = container_of(config, struct dw_i2s_dev, config); + u32 bclk_rate = config->sample_rate * 64; + + return clk_set_rate(dev->clk, bclk_rate); +} +#endif /* CONFIG_OF */ + +static int dw_i2s_probe(struct platform_device *pdev) +{ + const struct i2s_platform_data *pdata = pdev->dev.platform_data; + struct dw_i2s_dev *dev; + struct resource *res; + int ret, irq; + struct snd_soc_dai_driver *dw_i2s_dai; + const char *clk_id; + + dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); + if (!dev) + return -ENOMEM; + + dw_i2s_dai = devm_kzalloc(&pdev->dev, sizeof(*dw_i2s_dai), GFP_KERNEL); + if (!dw_i2s_dai) + return -ENOMEM; + + dw_i2s_dai->ops = &dw_i2s_dai_ops; + + dev->i2s_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); + if (IS_ERR(dev->i2s_base)) + return PTR_ERR(dev->i2s_base); + + dev->dev = &pdev->dev; + dev->is_jh7110 = false; + if (pdata) { + if (pdata->i2s_pd_init) { + ret = pdata->i2s_pd_init(dev); + if (ret) + return ret; + } + } + + if (!dev->is_jh7110) { + dev->reset = devm_reset_control_array_get_optional_shared(&pdev->dev); + if (IS_ERR(dev->reset)) + return PTR_ERR(dev->reset); + + ret = reset_control_deassert(dev->reset); + if (ret) + return ret; + } + + irq = platform_get_irq_optional(pdev, 0); + if (irq >= 0) { + ret = devm_request_irq(&pdev->dev, irq, i2s_irq_handler, 0, + pdev->name, dev); + if (ret < 0) { + dev_err(&pdev->dev, "failed to request irq\n"); + goto err_assert_reset; + } + } + + dev->i2s_reg_comp1 = I2S_COMP_PARAM_1; + dev->i2s_reg_comp2 = I2S_COMP_PARAM_2; + if (pdata) { + dev->capability = pdata->cap; + clk_id = NULL; + dev->quirks = pdata->quirks; + if (dev->quirks & DW_I2S_QUIRK_COMP_REG_OFFSET) { + dev->i2s_reg_comp1 = pdata->i2s_reg_comp1; + dev->i2s_reg_comp2 = pdata->i2s_reg_comp2; + } + ret = dw_configure_dai_by_pd(dev, dw_i2s_dai, res, pdata); + } else { + clk_id = "i2sclk"; + ret = dw_configure_dai_by_dt(dev, dw_i2s_dai, res); + } + if (ret < 0) + goto err_assert_reset; + + if (dev->capability & DW_I2S_MASTER) { + if (pdata) { + dev->i2s_clk_cfg = pdata->i2s_clk_cfg; + if (!dev->i2s_clk_cfg) { + dev_err(&pdev->dev, "no clock configure method\n"); + ret = -ENODEV; + goto err_assert_reset; + } + } + dev->clk = devm_clk_get(&pdev->dev, clk_id); + + if (IS_ERR(dev->clk)) { + ret = PTR_ERR(dev->clk); + goto err_assert_reset; + } + + ret = clk_prepare_enable(dev->clk); + if (ret < 0) + goto err_assert_reset; + } + + dev_set_drvdata(&pdev->dev, dev); + ret = devm_snd_soc_register_component(&pdev->dev, &dw_i2s_component, + dw_i2s_dai, 1); + if (ret != 0) { + dev_err(&pdev->dev, "not able to register dai\n"); + goto err_clk_disable; + } + + if (!pdata || dev->is_jh7110) { + if (irq >= 0) { + ret = dw_pcm_register(pdev); + dev->use_pio = true; + dev->l_reg = LRBR_LTHR(0); + dev->r_reg = RRBR_RTHR(0); + } else { + ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, + 0); + dev->use_pio = false; + } + + if (ret) { + dev_err(&pdev->dev, "could not register pcm: %d\n", + ret); + goto err_clk_disable; + } + } + + pm_runtime_enable(&pdev->dev); + return 0; + +err_clk_disable: + if (dev->capability & DW_I2S_MASTER) + clk_disable_unprepare(dev->clk); +err_assert_reset: + reset_control_assert(dev->reset); + return ret; +} + +static void dw_i2s_remove(struct platform_device *pdev) +{ + struct dw_i2s_dev *dev = dev_get_drvdata(&pdev->dev); + + if (dev->capability & DW_I2S_MASTER) + clk_disable_unprepare(dev->clk); + + reset_control_assert(dev->reset); + pm_runtime_disable(&pdev->dev); +} + +#ifdef CONFIG_OF +static const struct i2s_platform_data jh7110_i2stx0_data = { + .cap = DWC_I2S_PLAY | DW_I2S_MASTER, + .channel = TWO_CHANNEL_SUPPORT, + .snd_fmts = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE, + .snd_rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000, + .i2s_clk_cfg = jh7110_i2stx0_clk_cfg, + .i2s_pd_init = jh7110_i2s_crg_master_init, +}; + +static const struct i2s_platform_data jh7110_i2stx1_data = { + .cap = DWC_I2S_PLAY | DW_I2S_SLAVE, + .channel = TWO_CHANNEL_SUPPORT, + .snd_fmts = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE, + .snd_rates = SNDRV_PCM_RATE_8000_192000, + .i2s_pd_init = jh7110_i2s_crg_slave_init, +}; + +static const struct i2s_platform_data jh7110_i2srx_data = { + .cap = DWC_I2S_RECORD | DW_I2S_SLAVE, + .channel = TWO_CHANNEL_SUPPORT, + .snd_fmts = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE, + .snd_rates = SNDRV_PCM_RATE_8000_192000, + .i2s_pd_init = jh7110_i2srx_crg_init, +}; + +static const struct of_device_id dw_i2s_of_match[] = { + { .compatible = "snps,designware-i2s", }, + { .compatible = "starfive,jh7110-i2stx0", .data = &jh7110_i2stx0_data, }, + { .compatible = "starfive,jh7110-i2stx1", .data = &jh7110_i2stx1_data,}, + { .compatible = "starfive,jh7110-i2srx", .data = &jh7110_i2srx_data,}, + {}, +}; + +MODULE_DEVICE_TABLE(of, dw_i2s_of_match); +#endif + +static const struct dev_pm_ops dwc_pm_ops = { + SET_RUNTIME_PM_OPS(dw_i2s_runtime_suspend, dw_i2s_runtime_resume, NULL) +}; + +static struct platform_driver dw_i2s_driver = { + .probe = dw_i2s_probe, + .remove_new = dw_i2s_remove, + .driver = { + .name = "designware-i2s", + .of_match_table = of_match_ptr(dw_i2s_of_match), + .pm = &dwc_pm_ops, + }, +}; + +module_platform_driver(dw_i2s_driver); + +MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>"); +MODULE_DESCRIPTION("DESIGNWARE I2S SoC Interface"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:designware_i2s"); |