diff options
Diffstat (limited to 'sound/soc/fsl/fsl_sai.c')
| -rw-r--r-- | sound/soc/fsl/fsl_sai.c | 1757 |
1 files changed, 1757 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c new file mode 100644 index 000000000..3d202398c --- /dev/null +++ b/sound/soc/fsl/fsl_sai.c @@ -0,0 +1,1757 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// Freescale ALSA SoC Digital Audio Interface (SAI) driver. +// +// Copyright 2012-2015 Freescale Semiconductor, Inc. + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/dmaengine.h> +#include <linux/module.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/pinctrl/consumer.h> +#include <linux/pm_qos.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/time.h> +#include <sound/core.h> +#include <sound/dmaengine_pcm.h> +#include <sound/pcm_params.h> +#include <linux/mfd/syscon.h> +#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> + +#include "fsl_sai.h" +#include "fsl_utils.h" +#include "imx-pcm.h" + +#define FSL_SAI_FLAGS (FSL_SAI_CSR_SEIE |\ + FSL_SAI_CSR_FEIE) + +static const unsigned int fsl_sai_rates[] = { + 8000, 11025, 12000, 16000, 22050, + 24000, 32000, 44100, 48000, 64000, + 88200, 96000, 176400, 192000, 352800, + 384000, 705600, 768000, 1411200, 2822400, +}; + +static const struct snd_pcm_hw_constraint_list fsl_sai_rate_constraints = { + .count = ARRAY_SIZE(fsl_sai_rates), + .list = fsl_sai_rates, +}; + +/** + * fsl_sai_dir_is_synced - Check if stream is synced by the opposite stream + * + * SAI supports synchronous mode using bit/frame clocks of either Transmitter's + * or Receiver's for both streams. This function is used to check if clocks of + * the stream's are synced by the opposite stream. + * + * @sai: SAI context + * @dir: stream direction + */ +static inline bool fsl_sai_dir_is_synced(struct fsl_sai *sai, int dir) +{ + int adir = (dir == TX) ? RX : TX; + + /* current dir in async mode while opposite dir in sync mode */ + return !sai->synchronous[dir] && sai->synchronous[adir]; +} + +static struct pinctrl_state *fsl_sai_get_pins_state(struct fsl_sai *sai, u32 bclk) +{ + struct pinctrl_state *state = NULL; + + if (sai->is_pdm_mode) { + /* DSD512@44.1kHz, DSD512@48kHz */ + if (bclk >= 22579200) + state = pinctrl_lookup_state(sai->pinctrl, "dsd512"); + + /* Get default DSD state */ + if (IS_ERR_OR_NULL(state)) + state = pinctrl_lookup_state(sai->pinctrl, "dsd"); + } else { + /* 706k32b2c, 768k32b2c, etc */ + if (bclk >= 45158400) + state = pinctrl_lookup_state(sai->pinctrl, "pcm_b2m"); + } + + /* Get default state */ + if (IS_ERR_OR_NULL(state)) + state = pinctrl_lookup_state(sai->pinctrl, "default"); + + return state; +} + +static irqreturn_t fsl_sai_isr(int irq, void *devid) +{ + struct fsl_sai *sai = (struct fsl_sai *)devid; + unsigned int ofs = sai->soc_data->reg_offset; + struct device *dev = &sai->pdev->dev; + u32 flags, xcsr, mask; + irqreturn_t iret = IRQ_NONE; + + /* + * Both IRQ status bits and IRQ mask bits are in the xCSR but + * different shifts. And we here create a mask only for those + * IRQs that we activated. + */ + mask = (FSL_SAI_FLAGS >> FSL_SAI_CSR_xIE_SHIFT) << FSL_SAI_CSR_xF_SHIFT; + + /* Tx IRQ */ + regmap_read(sai->regmap, FSL_SAI_TCSR(ofs), &xcsr); + flags = xcsr & mask; + + if (flags) + iret = IRQ_HANDLED; + else + goto irq_rx; + + if (flags & FSL_SAI_CSR_WSF) + dev_dbg(dev, "isr: Start of Tx word detected\n"); + + if (flags & FSL_SAI_CSR_SEF) + dev_dbg(dev, "isr: Tx Frame sync error detected\n"); + + if (flags & FSL_SAI_CSR_FEF) + dev_dbg(dev, "isr: Transmit underrun detected\n"); + + if (flags & FSL_SAI_CSR_FWF) + dev_dbg(dev, "isr: Enabled transmit FIFO is empty\n"); + + if (flags & FSL_SAI_CSR_FRF) + dev_dbg(dev, "isr: Transmit FIFO watermark has been reached\n"); + + flags &= FSL_SAI_CSR_xF_W_MASK; + xcsr &= ~FSL_SAI_CSR_xF_MASK; + + if (flags) + regmap_write(sai->regmap, FSL_SAI_TCSR(ofs), flags | xcsr); + +irq_rx: + /* Rx IRQ */ + regmap_read(sai->regmap, FSL_SAI_RCSR(ofs), &xcsr); + flags = xcsr & mask; + + if (flags) + iret = IRQ_HANDLED; + else + goto out; + + if (flags & FSL_SAI_CSR_WSF) + dev_dbg(dev, "isr: Start of Rx word detected\n"); + + if (flags & FSL_SAI_CSR_SEF) + dev_dbg(dev, "isr: Rx Frame sync error detected\n"); + + if (flags & FSL_SAI_CSR_FEF) + dev_dbg(dev, "isr: Receive overflow detected\n"); + + if (flags & FSL_SAI_CSR_FWF) + dev_dbg(dev, "isr: Enabled receive FIFO is full\n"); + + if (flags & FSL_SAI_CSR_FRF) + dev_dbg(dev, "isr: Receive FIFO watermark has been reached\n"); + + flags &= FSL_SAI_CSR_xF_W_MASK; + xcsr &= ~FSL_SAI_CSR_xF_MASK; + + if (flags) + regmap_write(sai->regmap, FSL_SAI_RCSR(ofs), flags | xcsr); + +out: + return iret; +} + +static int fsl_sai_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask, + u32 rx_mask, int slots, int slot_width) +{ + struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); + + sai->slots = slots; + sai->slot_width = slot_width; + + return 0; +} + +static int fsl_sai_set_dai_bclk_ratio(struct snd_soc_dai *dai, + unsigned int ratio) +{ + struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai); + + sai->bclk_ratio = ratio; + + return 0; +} + +static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai, + int clk_id, unsigned int freq, bool tx) +{ + struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); + unsigned int ofs = sai->soc_data->reg_offset; + u32 val_cr2 = 0; + + switch (clk_id) { + case FSL_SAI_CLK_BUS: + val_cr2 |= FSL_SAI_CR2_MSEL_BUS; + break; + case FSL_SAI_CLK_MAST1: + val_cr2 |= FSL_SAI_CR2_MSEL_MCLK1; + break; + case FSL_SAI_CLK_MAST2: + val_cr2 |= FSL_SAI_CR2_MSEL_MCLK2; + break; + case FSL_SAI_CLK_MAST3: + val_cr2 |= FSL_SAI_CR2_MSEL_MCLK3; + break; + default: + return -EINVAL; + } + + regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx, ofs), + FSL_SAI_CR2_MSEL_MASK, val_cr2); + + return 0; +} + +static int fsl_sai_set_mclk_rate(struct snd_soc_dai *dai, int clk_id, unsigned int freq) +{ + struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai); + int ret; + + fsl_asoc_reparent_pll_clocks(dai->dev, sai->mclk_clk[clk_id], + sai->pll8k_clk, sai->pll11k_clk, freq); + + ret = clk_set_rate(sai->mclk_clk[clk_id], freq); + if (ret < 0) + dev_err(dai->dev, "failed to set clock rate (%u): %d\n", freq, ret); + + return ret; +} + +static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai, + int clk_id, unsigned int freq, int dir) +{ + struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); + int ret; + + if (dir == SND_SOC_CLOCK_IN) + return 0; + + if (freq > 0 && clk_id != FSL_SAI_CLK_BUS) { + if (clk_id < 0 || clk_id >= FSL_SAI_MCLK_MAX) { + dev_err(cpu_dai->dev, "Unknown clock id: %d\n", clk_id); + return -EINVAL; + } + + if (IS_ERR_OR_NULL(sai->mclk_clk[clk_id])) { + dev_err(cpu_dai->dev, "Unassigned clock: %d\n", clk_id); + return -EINVAL; + } + + if (sai->mclk_streams == 0) { + ret = fsl_sai_set_mclk_rate(cpu_dai, clk_id, freq); + if (ret < 0) + return ret; + } + } + + ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, true); + if (ret) { + dev_err(cpu_dai->dev, "Cannot set tx sysclk: %d\n", ret); + return ret; + } + + ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, false); + if (ret) + dev_err(cpu_dai->dev, "Cannot set rx sysclk: %d\n", ret); + + return ret; +} + +static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai, + unsigned int fmt, bool tx) +{ + struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); + unsigned int ofs = sai->soc_data->reg_offset; + u32 val_cr2 = 0, val_cr4 = 0; + + if (!sai->is_lsb_first) + val_cr4 |= FSL_SAI_CR4_MF; + + sai->is_pdm_mode = false; + sai->is_dsp_mode = false; + /* DAI mode */ + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_I2S: + /* + * Frame low, 1clk before data, one word length for frame sync, + * frame sync starts one serial clock cycle earlier, + * that is, together with the last bit of the previous + * data word. + */ + val_cr2 |= FSL_SAI_CR2_BCP; + val_cr4 |= FSL_SAI_CR4_FSE | FSL_SAI_CR4_FSP; + break; + case SND_SOC_DAIFMT_LEFT_J: + /* + * Frame high, one word length for frame sync, + * frame sync asserts with the first bit of the frame. + */ + val_cr2 |= FSL_SAI_CR2_BCP; + break; + case SND_SOC_DAIFMT_DSP_A: + /* + * Frame high, 1clk before data, one bit for frame sync, + * frame sync starts one serial clock cycle earlier, + * that is, together with the last bit of the previous + * data word. + */ + val_cr2 |= FSL_SAI_CR2_BCP; + val_cr4 |= FSL_SAI_CR4_FSE; + sai->is_dsp_mode = true; + break; + case SND_SOC_DAIFMT_DSP_B: + /* + * Frame high, one bit for frame sync, + * frame sync asserts with the first bit of the frame. + */ + val_cr2 |= FSL_SAI_CR2_BCP; + sai->is_dsp_mode = true; + break; + case SND_SOC_DAIFMT_PDM: + val_cr2 |= FSL_SAI_CR2_BCP; + val_cr4 &= ~FSL_SAI_CR4_MF; + sai->is_pdm_mode = true; + break; + case SND_SOC_DAIFMT_RIGHT_J: + /* To be done */ + default: + return -EINVAL; + } + + /* DAI clock inversion */ + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_IB_IF: + /* Invert both clocks */ + val_cr2 ^= FSL_SAI_CR2_BCP; + val_cr4 ^= FSL_SAI_CR4_FSP; + break; + case SND_SOC_DAIFMT_IB_NF: + /* Invert bit clock */ + val_cr2 ^= FSL_SAI_CR2_BCP; + break; + case SND_SOC_DAIFMT_NB_IF: + /* Invert frame clock */ + val_cr4 ^= FSL_SAI_CR4_FSP; + break; + case SND_SOC_DAIFMT_NB_NF: + /* Nothing to do for both normal cases */ + break; + default: + return -EINVAL; + } + + /* DAI clock provider masks */ + switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { + case SND_SOC_DAIFMT_BP_FP: + val_cr2 |= FSL_SAI_CR2_BCD_MSTR; + val_cr4 |= FSL_SAI_CR4_FSD_MSTR; + sai->is_consumer_mode = false; + break; + case SND_SOC_DAIFMT_BC_FC: + sai->is_consumer_mode = true; + break; + case SND_SOC_DAIFMT_BP_FC: + val_cr2 |= FSL_SAI_CR2_BCD_MSTR; + sai->is_consumer_mode = false; + break; + case SND_SOC_DAIFMT_BC_FP: + val_cr4 |= FSL_SAI_CR4_FSD_MSTR; + sai->is_consumer_mode = true; + break; + default: + return -EINVAL; + } + + regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx, ofs), + FSL_SAI_CR2_BCP | FSL_SAI_CR2_BCD_MSTR, val_cr2); + regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs), + FSL_SAI_CR4_MF | FSL_SAI_CR4_FSE | + FSL_SAI_CR4_FSP | FSL_SAI_CR4_FSD_MSTR, val_cr4); + + return 0; +} + +static int fsl_sai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) +{ + int ret; + + ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, true); + if (ret) { + dev_err(cpu_dai->dev, "Cannot set tx format: %d\n", ret); + return ret; + } + + ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, false); + if (ret) + dev_err(cpu_dai->dev, "Cannot set rx format: %d\n", ret); + + return ret; +} + +static int fsl_sai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq) +{ + struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai); + unsigned int reg, ofs = sai->soc_data->reg_offset; + unsigned long clk_rate; + u32 savediv = 0, ratio, bestdiff = freq; + int adir = tx ? RX : TX; + int dir = tx ? TX : RX; + u32 id; + bool support_1_1_ratio = sai->verid.version >= 0x0301; + + /* Don't apply to consumer mode */ + if (sai->is_consumer_mode) + return 0; + + /* + * There is no point in polling MCLK0 if it is identical to MCLK1. + * And given that MQS use case has to use MCLK1 though two clocks + * are the same, we simply skip MCLK0 and start to find from MCLK1. + */ + id = sai->soc_data->mclk0_is_mclk1 ? 1 : 0; + + for (; id < FSL_SAI_MCLK_MAX; id++) { + int diff; + + clk_rate = clk_get_rate(sai->mclk_clk[id]); + if (!clk_rate) + continue; + + ratio = DIV_ROUND_CLOSEST(clk_rate, freq); + if (!ratio || ratio > 512) + continue; + if (ratio == 1 && !support_1_1_ratio) + continue; + if ((ratio & 1) && ratio > 1) + continue; + + diff = abs((long)clk_rate - ratio * freq); + + /* + * Drop the source that can not be + * divided into the required rate. + */ + if (diff != 0 && clk_rate / diff < 1000) + continue; + + dev_dbg(dai->dev, + "ratio %d for freq %dHz based on clock %ldHz\n", + ratio, freq, clk_rate); + + + if (diff < bestdiff) { + savediv = ratio; + sai->mclk_id[tx] = id; + bestdiff = diff; + } + + if (diff == 0) + break; + } + + if (savediv == 0) { + dev_err(dai->dev, "failed to derive required %cx rate: %d\n", + tx ? 'T' : 'R', freq); + return -EINVAL; + } + + dev_dbg(dai->dev, "best fit: clock id=%d, div=%d, deviation =%d\n", + sai->mclk_id[tx], savediv, bestdiff); + + /* + * 1) For Asynchronous mode, we must set RCR2 register for capture, and + * set TCR2 register for playback. + * 2) For Tx sync with Rx clock, we must set RCR2 register for playback + * and capture. + * 3) For Rx sync with Tx clock, we must set TCR2 register for playback + * and capture. + * 4) For Tx and Rx are both Synchronous with another SAI, we just + * ignore it. + */ + if (fsl_sai_dir_is_synced(sai, adir)) + reg = FSL_SAI_xCR2(!tx, ofs); + else if (!sai->synchronous[dir]) + reg = FSL_SAI_xCR2(tx, ofs); + else + return 0; + + regmap_update_bits(sai->regmap, reg, FSL_SAI_CR2_MSEL_MASK, + FSL_SAI_CR2_MSEL(sai->mclk_id[tx])); + + if (savediv == 1) { + regmap_update_bits(sai->regmap, reg, + FSL_SAI_CR2_DIV_MASK | FSL_SAI_CR2_BYP, + FSL_SAI_CR2_BYP); + if (fsl_sai_dir_is_synced(sai, adir)) + regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx, ofs), + FSL_SAI_CR2_BCI, FSL_SAI_CR2_BCI); + else + regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx, ofs), + FSL_SAI_CR2_BCI, 0); + } else { + regmap_update_bits(sai->regmap, reg, + FSL_SAI_CR2_DIV_MASK | FSL_SAI_CR2_BYP, + savediv / 2 - 1); + } + + return 0; +} + +static int fsl_sai_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *cpu_dai) +{ + struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); + unsigned int ofs = sai->soc_data->reg_offset; + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + unsigned int channels = params_channels(params); + struct snd_dmaengine_dai_dma_data *dma_params; + struct fsl_sai_dl_cfg *dl_cfg = sai->dl_cfg; + u32 word_width = params_width(params); + int trce_mask = 0, dl_cfg_idx = 0; + int dl_cfg_cnt = sai->dl_cfg_cnt; + u32 dl_type = FSL_SAI_DL_I2S; + u32 val_cr4 = 0, val_cr5 = 0; + u32 slots = (channels == 1) ? 2 : channels; + u32 slot_width = word_width; + int adir = tx ? RX : TX; + u32 pins, bclk; + u32 watermark; + int ret, i; + + if (sai->slot_width) + slot_width = sai->slot_width; + + if (sai->slots) + slots = sai->slots; + else if (sai->bclk_ratio) + slots = sai->bclk_ratio / slot_width; + + pins = DIV_ROUND_UP(channels, slots); + + /* + * PDM mode, channels are independent + * each channels are on one dataline/FIFO. + */ + if (sai->is_pdm_mode) { + pins = channels; + dl_type = FSL_SAI_DL_PDM; + } + + for (i = 0; i < dl_cfg_cnt; i++) { + if (dl_cfg[i].type == dl_type && dl_cfg[i].pins[tx] == pins) { + dl_cfg_idx = i; + break; + } + } + + if (hweight8(dl_cfg[dl_cfg_idx].mask[tx]) < pins) { + dev_err(cpu_dai->dev, "channel not supported\n"); + return -EINVAL; + } + + bclk = params_rate(params) * (sai->bclk_ratio ? sai->bclk_ratio : slots * slot_width); + + if (!IS_ERR_OR_NULL(sai->pinctrl)) { + sai->pins_state = fsl_sai_get_pins_state(sai, bclk); + if (!IS_ERR_OR_NULL(sai->pins_state)) { + ret = pinctrl_select_state(sai->pinctrl, sai->pins_state); + if (ret) { + dev_err(cpu_dai->dev, "failed to set proper pins state: %d\n", ret); + return ret; + } + } + } + + if (!sai->is_consumer_mode) { + ret = fsl_sai_set_bclk(cpu_dai, tx, bclk); + if (ret) + return ret; + + /* Do not enable the clock if it is already enabled */ + if (!(sai->mclk_streams & BIT(substream->stream))) { + ret = clk_prepare_enable(sai->mclk_clk[sai->mclk_id[tx]]); + if (ret) + return ret; + + sai->mclk_streams |= BIT(substream->stream); + } + } + + if (!sai->is_dsp_mode && !sai->is_pdm_mode) + val_cr4 |= FSL_SAI_CR4_SYWD(slot_width); + + val_cr5 |= FSL_SAI_CR5_WNW(slot_width); + val_cr5 |= FSL_SAI_CR5_W0W(slot_width); + + if (sai->is_lsb_first || sai->is_pdm_mode) + val_cr5 |= FSL_SAI_CR5_FBT(0); + else + val_cr5 |= FSL_SAI_CR5_FBT(word_width - 1); + + val_cr4 |= FSL_SAI_CR4_FRSZ(slots); + + /* Set to output mode to avoid tri-stated data pins */ + if (tx) + val_cr4 |= FSL_SAI_CR4_CHMOD; + + /* + * For SAI provider mode, when Tx(Rx) sync with Rx(Tx) clock, Rx(Tx) will + * generate bclk and frame clock for Tx(Rx), we should set RCR4(TCR4), + * RCR5(TCR5) for playback(capture), or there will be sync error. + */ + + if (!sai->is_consumer_mode && fsl_sai_dir_is_synced(sai, adir)) { + regmap_update_bits(sai->regmap, FSL_SAI_xCR4(!tx, ofs), + FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK | + FSL_SAI_CR4_CHMOD_MASK, + val_cr4); + regmap_update_bits(sai->regmap, FSL_SAI_xCR5(!tx, ofs), + FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK | + FSL_SAI_CR5_FBT_MASK, val_cr5); + } + + /* + * Combine mode has limation: + * - Can't used for singel dataline/FIFO case except the FIFO0 + * - Can't used for multi dataline/FIFO case except the enabled FIFOs + * are successive and start from FIFO0 + * + * So for common usage, all multi fifo case disable the combine mode. + */ + if (hweight8(dl_cfg[dl_cfg_idx].mask[tx]) <= 1 || sai->is_multi_fifo_dma) + regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs), + FSL_SAI_CR4_FCOMB_MASK, 0); + else + regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs), + FSL_SAI_CR4_FCOMB_MASK, FSL_SAI_CR4_FCOMB_SOFT); + + dma_params = tx ? &sai->dma_params_tx : &sai->dma_params_rx; + dma_params->addr = sai->res->start + FSL_SAI_xDR0(tx) + + dl_cfg[dl_cfg_idx].start_off[tx] * 0x4; + + if (sai->is_multi_fifo_dma) { + sai->audio_config[tx].words_per_fifo = min(slots, channels); + if (tx) { + sai->audio_config[tx].n_fifos_dst = pins; + sai->audio_config[tx].stride_fifos_dst = dl_cfg[dl_cfg_idx].next_off[tx]; + } else { + sai->audio_config[tx].n_fifos_src = pins; + sai->audio_config[tx].stride_fifos_src = dl_cfg[dl_cfg_idx].next_off[tx]; + } + dma_params->maxburst = sai->audio_config[tx].words_per_fifo * pins; + dma_params->peripheral_config = &sai->audio_config[tx]; + dma_params->peripheral_size = sizeof(sai->audio_config[tx]); + + watermark = tx ? (sai->soc_data->fifo_depth - dma_params->maxburst) : + (dma_params->maxburst - 1); + regmap_update_bits(sai->regmap, FSL_SAI_xCR1(tx, ofs), + FSL_SAI_CR1_RFW_MASK(sai->soc_data->fifo_depth), + watermark); + } + + /* Find a proper tcre setting */ + for (i = 0; i < sai->soc_data->pins; i++) { + trce_mask = (1 << (i + 1)) - 1; + if (hweight8(dl_cfg[dl_cfg_idx].mask[tx] & trce_mask) == pins) + break; + } + + regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx, ofs), + FSL_SAI_CR3_TRCE_MASK, + FSL_SAI_CR3_TRCE((dl_cfg[dl_cfg_idx].mask[tx] & trce_mask))); + + /* + * When the TERE and FSD_MSTR enabled before configuring the word width + * There will be no frame sync clock issue, because word width impact + * the generation of frame sync clock. + * + * TERE enabled earlier only for i.MX8MP case for the hardware limitation, + * We need to disable FSD_MSTR before configuring word width, then enable + * FSD_MSTR bit for this specific case. + */ + if (sai->soc_data->mclk_with_tere && sai->mclk_direction_output && + !sai->is_consumer_mode) + regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs), + FSL_SAI_CR4_FSD_MSTR, 0); + + regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs), + FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK | + FSL_SAI_CR4_CHMOD_MASK, + val_cr4); + regmap_update_bits(sai->regmap, FSL_SAI_xCR5(tx, ofs), + FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK | + FSL_SAI_CR5_FBT_MASK, val_cr5); + + /* Enable FSD_MSTR after configuring word width */ + if (sai->soc_data->mclk_with_tere && sai->mclk_direction_output && + !sai->is_consumer_mode) + regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs), + FSL_SAI_CR4_FSD_MSTR, FSL_SAI_CR4_FSD_MSTR); + + regmap_write(sai->regmap, FSL_SAI_xMR(tx), + ~0UL - ((1 << min(channels, slots)) - 1)); + + return 0; +} + +static int fsl_sai_hw_free(struct snd_pcm_substream *substream, + struct snd_soc_dai *cpu_dai) +{ + struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + unsigned int ofs = sai->soc_data->reg_offset; + + /* Clear xMR to avoid channel swap with mclk_with_tere enabled case */ + regmap_write(sai->regmap, FSL_SAI_xMR(tx), 0); + + regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx, ofs), + FSL_SAI_CR3_TRCE_MASK, 0); + + if (!sai->is_consumer_mode && + sai->mclk_streams & BIT(substream->stream)) { + clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[tx]]); + sai->mclk_streams &= ~BIT(substream->stream); + } + + return 0; +} + +static void fsl_sai_config_disable(struct fsl_sai *sai, int dir) +{ + unsigned int ofs = sai->soc_data->reg_offset; + bool tx = dir == TX; + u32 xcsr, count = 100, mask; + + if (sai->soc_data->mclk_with_tere && sai->mclk_direction_output) + mask = FSL_SAI_CSR_TERE; + else + mask = FSL_SAI_CSR_TERE | FSL_SAI_CSR_BCE; + + regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs), + mask, 0); + + /* TERE will remain set till the end of current frame */ + do { + udelay(10); + regmap_read(sai->regmap, FSL_SAI_xCSR(tx, ofs), &xcsr); + } while (--count && xcsr & FSL_SAI_CSR_TERE); + + regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs), + FSL_SAI_CSR_FR, FSL_SAI_CSR_FR); + + /* + * For sai master mode, after several open/close sai, + * there will be no frame clock, and can't recover + * anymore. Add software reset to fix this issue. + * This is a hardware bug, and will be fix in the + * next sai version. + */ + if (!sai->is_consumer_mode) { + /* Software Reset */ + regmap_write(sai->regmap, FSL_SAI_xCSR(tx, ofs), FSL_SAI_CSR_SR); + /* Clear SR bit to finish the reset */ + regmap_write(sai->regmap, FSL_SAI_xCSR(tx, ofs), 0); + } +} + +static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *cpu_dai) +{ + struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); + unsigned int ofs = sai->soc_data->reg_offset; + + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + int adir = tx ? RX : TX; + int dir = tx ? TX : RX; + u32 xcsr; + + /* + * Asynchronous mode: Clear SYNC for both Tx and Rx. + * Rx sync with Tx clocks: Clear SYNC for Tx, set it for Rx. + * Tx sync with Rx clocks: Clear SYNC for Rx, set it for Tx. + */ + regmap_update_bits(sai->regmap, FSL_SAI_TCR2(ofs), FSL_SAI_CR2_SYNC, + sai->synchronous[TX] ? FSL_SAI_CR2_SYNC : 0); + regmap_update_bits(sai->regmap, FSL_SAI_RCR2(ofs), FSL_SAI_CR2_SYNC, + sai->synchronous[RX] ? FSL_SAI_CR2_SYNC : 0); + + /* + * It is recommended that the transmitter is the last enabled + * and the first disabled. + */ + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs), + FSL_SAI_CSR_FRDE, FSL_SAI_CSR_FRDE); + + regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs), + FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE); + /* + * Enable the opposite direction for synchronous mode + * 1. Tx sync with Rx: only set RE for Rx; set TE & RE for Tx + * 2. Rx sync with Tx: only set TE for Tx; set RE & TE for Rx + * + * RM recommends to enable RE after TE for case 1 and to enable + * TE after RE for case 2, but we here may not always guarantee + * that happens: "arecord 1.wav; aplay 2.wav" in case 1 enables + * TE after RE, which is against what RM recommends but should + * be safe to do, judging by years of testing results. + */ + if (fsl_sai_dir_is_synced(sai, adir)) + regmap_update_bits(sai->regmap, FSL_SAI_xCSR((!tx), ofs), + FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE); + + regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs), + FSL_SAI_CSR_xIE_MASK, FSL_SAI_FLAGS); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs), + FSL_SAI_CSR_FRDE, 0); + regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs), + FSL_SAI_CSR_xIE_MASK, 0); + + /* Check if the opposite FRDE is also disabled */ + regmap_read(sai->regmap, FSL_SAI_xCSR(!tx, ofs), &xcsr); + + /* + * If opposite stream provides clocks for synchronous mode and + * it is inactive, disable it before disabling the current one + */ + if (fsl_sai_dir_is_synced(sai, adir) && !(xcsr & FSL_SAI_CSR_FRDE)) + fsl_sai_config_disable(sai, adir); + + /* + * Disable current stream if either of: + * 1. current stream doesn't provide clocks for synchronous mode + * 2. current stream provides clocks for synchronous mode but no + * more stream is active. + */ + if (!fsl_sai_dir_is_synced(sai, dir) || !(xcsr & FSL_SAI_CSR_FRDE)) + fsl_sai_config_disable(sai, dir); + + break; + default: + return -EINVAL; + } + + return 0; +} + +static int fsl_sai_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *cpu_dai) +{ + struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); + bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + int ret; + + /* + * EDMA controller needs period size to be a multiple of + * tx/rx maxburst + */ + if (sai->soc_data->use_edma) + snd_pcm_hw_constraint_step(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_PERIOD_SIZE, + tx ? sai->dma_params_tx.maxburst : + sai->dma_params_rx.maxburst); + + ret = snd_pcm_hw_constraint_list(substream->runtime, 0, + SNDRV_PCM_HW_PARAM_RATE, &fsl_sai_rate_constraints); + + return ret; +} + +static int fsl_sai_dai_probe(struct snd_soc_dai *cpu_dai) +{ + struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev); + unsigned int ofs = sai->soc_data->reg_offset; + + /* Software Reset for both Tx and Rx */ + regmap_write(sai->regmap, FSL_SAI_TCSR(ofs), FSL_SAI_CSR_SR); + regmap_write(sai->regmap, FSL_SAI_RCSR(ofs), FSL_SAI_CSR_SR); + /* Clear SR bit to finish the reset */ + regmap_write(sai->regmap, FSL_SAI_TCSR(ofs), 0); + regmap_write(sai->regmap, FSL_SAI_RCSR(ofs), 0); + + regmap_update_bits(sai->regmap, FSL_SAI_TCR1(ofs), + FSL_SAI_CR1_RFW_MASK(sai->soc_data->fifo_depth), + sai->soc_data->fifo_depth - sai->dma_params_tx.maxburst); + regmap_update_bits(sai->regmap, FSL_SAI_RCR1(ofs), + FSL_SAI_CR1_RFW_MASK(sai->soc_data->fifo_depth), + sai->dma_params_rx.maxburst - 1); + + snd_soc_dai_init_dma_data(cpu_dai, &sai->dma_params_tx, + &sai->dma_params_rx); + + return 0; +} + +static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = { + .probe = fsl_sai_dai_probe, + .set_bclk_ratio = fsl_sai_set_dai_bclk_ratio, + .set_sysclk = fsl_sai_set_dai_sysclk, + .set_fmt = fsl_sai_set_dai_fmt, + .set_tdm_slot = fsl_sai_set_dai_tdm_slot, + .hw_params = fsl_sai_hw_params, + .hw_free = fsl_sai_hw_free, + .trigger = fsl_sai_trigger, + .startup = fsl_sai_startup, +}; + +static int fsl_sai_dai_resume(struct snd_soc_component *component) +{ + struct fsl_sai *sai = snd_soc_component_get_drvdata(component); + struct device *dev = &sai->pdev->dev; + int ret; + + if (!IS_ERR_OR_NULL(sai->pinctrl) && !IS_ERR_OR_NULL(sai->pins_state)) { + ret = pinctrl_select_state(sai->pinctrl, sai->pins_state); + if (ret) { + dev_err(dev, "failed to set proper pins state: %d\n", ret); + return ret; + } + } + + return 0; +} + +static struct snd_soc_dai_driver fsl_sai_dai_template = { + .playback = { + .stream_name = "CPU-Playback", + .channels_min = 1, + .channels_max = 32, + .rate_min = 8000, + .rate_max = 2822400, + .rates = SNDRV_PCM_RATE_KNOT, + .formats = FSL_SAI_FORMATS, + }, + .capture = { + .stream_name = "CPU-Capture", + .channels_min = 1, + .channels_max = 32, + .rate_min = 8000, + .rate_max = 2822400, + .rates = SNDRV_PCM_RATE_KNOT, + .formats = FSL_SAI_FORMATS, + }, + .ops = &fsl_sai_pcm_dai_ops, +}; + +static const struct snd_soc_component_driver fsl_component = { + .name = "fsl-sai", + .resume = fsl_sai_dai_resume, + .legacy_dai_naming = 1, +}; + +static struct reg_default fsl_sai_reg_defaults_ofs0[] = { + {FSL_SAI_TCR1(0), 0}, + {FSL_SAI_TCR2(0), 0}, + {FSL_SAI_TCR3(0), 0}, + {FSL_SAI_TCR4(0), 0}, + {FSL_SAI_TCR5(0), 0}, + {FSL_SAI_TDR0, 0}, + {FSL_SAI_TDR1, 0}, + {FSL_SAI_TDR2, 0}, + {FSL_SAI_TDR3, 0}, + {FSL_SAI_TDR4, 0}, + {FSL_SAI_TDR5, 0}, + {FSL_SAI_TDR6, 0}, + {FSL_SAI_TDR7, 0}, + {FSL_SAI_TMR, 0}, + {FSL_SAI_RCR1(0), 0}, + {FSL_SAI_RCR2(0), 0}, + {FSL_SAI_RCR3(0), 0}, + {FSL_SAI_RCR4(0), 0}, + {FSL_SAI_RCR5(0), 0}, + {FSL_SAI_RMR, 0}, +}; + +static struct reg_default fsl_sai_reg_defaults_ofs8[] = { + {FSL_SAI_TCR1(8), 0}, + {FSL_SAI_TCR2(8), 0}, + {FSL_SAI_TCR3(8), 0}, + {FSL_SAI_TCR4(8), 0}, + {FSL_SAI_TCR5(8), 0}, + {FSL_SAI_TDR0, 0}, + {FSL_SAI_TDR1, 0}, + {FSL_SAI_TDR2, 0}, + {FSL_SAI_TDR3, 0}, + {FSL_SAI_TDR4, 0}, + {FSL_SAI_TDR5, 0}, + {FSL_SAI_TDR6, 0}, + {FSL_SAI_TDR7, 0}, + {FSL_SAI_TMR, 0}, + {FSL_SAI_RCR1(8), 0}, + {FSL_SAI_RCR2(8), 0}, + {FSL_SAI_RCR3(8), 0}, + {FSL_SAI_RCR4(8), 0}, + {FSL_SAI_RCR5(8), 0}, + {FSL_SAI_RMR, 0}, + {FSL_SAI_MCTL, 0}, + {FSL_SAI_MDIV, 0}, +}; + +static bool fsl_sai_readable_reg(struct device *dev, unsigned int reg) +{ + struct fsl_sai *sai = dev_get_drvdata(dev); + unsigned int ofs = sai->soc_data->reg_offset; + + if (reg >= FSL_SAI_TCSR(ofs) && reg <= FSL_SAI_TCR5(ofs)) + return true; + + if (reg >= FSL_SAI_RCSR(ofs) && reg <= FSL_SAI_RCR5(ofs)) + return true; + + switch (reg) { + case FSL_SAI_TFR0: + case FSL_SAI_TFR1: + case FSL_SAI_TFR2: + case FSL_SAI_TFR3: + case FSL_SAI_TFR4: + case FSL_SAI_TFR5: + case FSL_SAI_TFR6: + case FSL_SAI_TFR7: + case FSL_SAI_TMR: + case FSL_SAI_RDR0: + case FSL_SAI_RDR1: + case FSL_SAI_RDR2: + case FSL_SAI_RDR3: + case FSL_SAI_RDR4: + case FSL_SAI_RDR5: + case FSL_SAI_RDR6: + case FSL_SAI_RDR7: + case FSL_SAI_RFR0: + case FSL_SAI_RFR1: + case FSL_SAI_RFR2: + case FSL_SAI_RFR3: + case FSL_SAI_RFR4: + case FSL_SAI_RFR5: + case FSL_SAI_RFR6: + case FSL_SAI_RFR7: + case FSL_SAI_RMR: + case FSL_SAI_MCTL: + case FSL_SAI_MDIV: + case FSL_SAI_VERID: + case FSL_SAI_PARAM: + case FSL_SAI_TTCTN: + case FSL_SAI_RTCTN: + case FSL_SAI_TTCTL: + case FSL_SAI_TBCTN: + case FSL_SAI_TTCAP: + case FSL_SAI_RTCTL: + case FSL_SAI_RBCTN: + case FSL_SAI_RTCAP: + return true; + default: + return false; + } +} + +static bool fsl_sai_volatile_reg(struct device *dev, unsigned int reg) +{ + struct fsl_sai *sai = dev_get_drvdata(dev); + unsigned int ofs = sai->soc_data->reg_offset; + + if (reg == FSL_SAI_TCSR(ofs) || reg == FSL_SAI_RCSR(ofs)) + return true; + + /* Set VERID and PARAM be volatile for reading value in probe */ + if (ofs == 8 && (reg == FSL_SAI_VERID || reg == FSL_SAI_PARAM)) + return true; + + switch (reg) { + case FSL_SAI_TFR0: + case FSL_SAI_TFR1: + case FSL_SAI_TFR2: + case FSL_SAI_TFR3: + case FSL_SAI_TFR4: + case FSL_SAI_TFR5: + case FSL_SAI_TFR6: + case FSL_SAI_TFR7: + case FSL_SAI_RFR0: + case FSL_SAI_RFR1: + case FSL_SAI_RFR2: + case FSL_SAI_RFR3: + case FSL_SAI_RFR4: + case FSL_SAI_RFR5: + case FSL_SAI_RFR6: + case FSL_SAI_RFR7: + case FSL_SAI_RDR0: + case FSL_SAI_RDR1: + case FSL_SAI_RDR2: + case FSL_SAI_RDR3: + case FSL_SAI_RDR4: + case FSL_SAI_RDR5: + case FSL_SAI_RDR6: + case FSL_SAI_RDR7: + return true; + default: + return false; + } +} + +static bool fsl_sai_writeable_reg(struct device *dev, unsigned int reg) +{ + struct fsl_sai *sai = dev_get_drvdata(dev); + unsigned int ofs = sai->soc_data->reg_offset; + + if (reg >= FSL_SAI_TCSR(ofs) && reg <= FSL_SAI_TCR5(ofs)) + return true; + + if (reg >= FSL_SAI_RCSR(ofs) && reg <= FSL_SAI_RCR5(ofs)) + return true; + + switch (reg) { + case FSL_SAI_TDR0: + case FSL_SAI_TDR1: + case FSL_SAI_TDR2: + case FSL_SAI_TDR3: + case FSL_SAI_TDR4: + case FSL_SAI_TDR5: + case FSL_SAI_TDR6: + case FSL_SAI_TDR7: + case FSL_SAI_TMR: + case FSL_SAI_RMR: + case FSL_SAI_MCTL: + case FSL_SAI_MDIV: + case FSL_SAI_TTCTL: + case FSL_SAI_RTCTL: + return true; + default: + return false; + } +} + +static struct regmap_config fsl_sai_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .fast_io = true, + + .max_register = FSL_SAI_RMR, + .reg_defaults = fsl_sai_reg_defaults_ofs0, + .num_reg_defaults = ARRAY_SIZE(fsl_sai_reg_defaults_ofs0), + .readable_reg = fsl_sai_readable_reg, + .volatile_reg = fsl_sai_volatile_reg, + .writeable_reg = fsl_sai_writeable_reg, + .cache_type = REGCACHE_FLAT, +}; + +static int fsl_sai_check_version(struct device *dev) +{ + struct fsl_sai *sai = dev_get_drvdata(dev); + unsigned char ofs = sai->soc_data->reg_offset; + unsigned int val; + int ret; + + if (FSL_SAI_TCSR(ofs) == FSL_SAI_VERID) + return 0; + + ret = regmap_read(sai->regmap, FSL_SAI_VERID, &val); + if (ret < 0) + return ret; + + dev_dbg(dev, "VERID: 0x%016X\n", val); + + sai->verid.version = val & + (FSL_SAI_VERID_MAJOR_MASK | FSL_SAI_VERID_MINOR_MASK); + sai->verid.version >>= FSL_SAI_VERID_MINOR_SHIFT; + sai->verid.feature = val & FSL_SAI_VERID_FEATURE_MASK; + + ret = regmap_read(sai->regmap, FSL_SAI_PARAM, &val); + if (ret < 0) + return ret; + + dev_dbg(dev, "PARAM: 0x%016X\n", val); + + /* Max slots per frame, power of 2 */ + sai->param.slot_num = 1 << + ((val & FSL_SAI_PARAM_SPF_MASK) >> FSL_SAI_PARAM_SPF_SHIFT); + + /* Words per fifo, power of 2 */ + sai->param.fifo_depth = 1 << + ((val & FSL_SAI_PARAM_WPF_MASK) >> FSL_SAI_PARAM_WPF_SHIFT); + + /* Number of datalines implemented */ + sai->param.dataline = val & FSL_SAI_PARAM_DLN_MASK; + + return 0; +} + +/* + * Calculate the offset between first two datalines, don't + * different offset in one case. + */ +static unsigned int fsl_sai_calc_dl_off(unsigned long dl_mask) +{ + int fbidx, nbidx, offset; + + fbidx = find_first_bit(&dl_mask, FSL_SAI_DL_NUM); + nbidx = find_next_bit(&dl_mask, FSL_SAI_DL_NUM, fbidx + 1); + offset = nbidx - fbidx - 1; + + return (offset < 0 || offset >= (FSL_SAI_DL_NUM - 1) ? 0 : offset); +} + +/* + * read the fsl,dataline property from dts file. + * It has 3 value for each configuration, first one means the type: + * I2S(1) or PDM(2), second one is dataline mask for 'rx', third one is + * dataline mask for 'tx'. for example + * + * fsl,dataline = <1 0xff 0xff 2 0xff 0x11>, + * + * It means I2S type rx mask is 0xff, tx mask is 0xff, PDM type + * rx mask is 0xff, tx mask is 0x11 (dataline 1 and 4 enabled). + * + */ +static int fsl_sai_read_dlcfg(struct fsl_sai *sai) +{ + struct platform_device *pdev = sai->pdev; + struct device_node *np = pdev->dev.of_node; + struct device *dev = &pdev->dev; + int ret, elems, i, index, num_cfg; + char *propname = "fsl,dataline"; + struct fsl_sai_dl_cfg *cfg; + unsigned long dl_mask; + unsigned int soc_dl; + u32 rx, tx, type; + + elems = of_property_count_u32_elems(np, propname); + + if (elems <= 0) { + elems = 0; + } else if (elems % 3) { + dev_err(dev, "Number of elements must be divisible to 3.\n"); + return -EINVAL; + } + + num_cfg = elems / 3; + /* Add one more for default value */ + cfg = devm_kzalloc(&pdev->dev, (num_cfg + 1) * sizeof(*cfg), GFP_KERNEL); + if (!cfg) + return -ENOMEM; + + /* Consider default value "0 0xFF 0xFF" if property is missing */ + soc_dl = BIT(sai->soc_data->pins) - 1; + cfg[0].type = FSL_SAI_DL_DEFAULT; + cfg[0].pins[0] = sai->soc_data->pins; + cfg[0].mask[0] = soc_dl; + cfg[0].start_off[0] = 0; + cfg[0].next_off[0] = 0; + + cfg[0].pins[1] = sai->soc_data->pins; + cfg[0].mask[1] = soc_dl; + cfg[0].start_off[1] = 0; + cfg[0].next_off[1] = 0; + for (i = 1, index = 0; i < num_cfg + 1; i++) { + /* + * type of dataline + * 0 means default mode + * 1 means I2S mode + * 2 means PDM mode + */ + ret = of_property_read_u32_index(np, propname, index++, &type); + if (ret) + return -EINVAL; + + ret = of_property_read_u32_index(np, propname, index++, &rx); + if (ret) + return -EINVAL; + + ret = of_property_read_u32_index(np, propname, index++, &tx); + if (ret) + return -EINVAL; + + if ((rx & ~soc_dl) || (tx & ~soc_dl)) { + dev_err(dev, "dataline cfg[%d] setting error, mask is 0x%x\n", i, soc_dl); + return -EINVAL; + } + + rx = rx & soc_dl; + tx = tx & soc_dl; + + cfg[i].type = type; + cfg[i].pins[0] = hweight8(rx); + cfg[i].mask[0] = rx; + dl_mask = rx; + cfg[i].start_off[0] = find_first_bit(&dl_mask, FSL_SAI_DL_NUM); + cfg[i].next_off[0] = fsl_sai_calc_dl_off(rx); + + cfg[i].pins[1] = hweight8(tx); + cfg[i].mask[1] = tx; + dl_mask = tx; + cfg[i].start_off[1] = find_first_bit(&dl_mask, FSL_SAI_DL_NUM); + cfg[i].next_off[1] = fsl_sai_calc_dl_off(tx); + } + + sai->dl_cfg = cfg; + sai->dl_cfg_cnt = num_cfg + 1; + return 0; +} + +static int fsl_sai_runtime_suspend(struct device *dev); +static int fsl_sai_runtime_resume(struct device *dev); + +static int fsl_sai_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct device *dev = &pdev->dev; + struct fsl_sai *sai; + struct regmap *gpr; + void __iomem *base; + char tmp[8]; + int irq, ret, i; + int index; + u32 dmas[4]; + + sai = devm_kzalloc(dev, sizeof(*sai), GFP_KERNEL); + if (!sai) + return -ENOMEM; + + sai->pdev = pdev; + sai->soc_data = of_device_get_match_data(dev); + + sai->is_lsb_first = of_property_read_bool(np, "lsb-first"); + + base = devm_platform_get_and_ioremap_resource(pdev, 0, &sai->res); + if (IS_ERR(base)) + return PTR_ERR(base); + + if (sai->soc_data->reg_offset == 8) { + fsl_sai_regmap_config.reg_defaults = fsl_sai_reg_defaults_ofs8; + fsl_sai_regmap_config.max_register = FSL_SAI_MDIV; + fsl_sai_regmap_config.num_reg_defaults = + ARRAY_SIZE(fsl_sai_reg_defaults_ofs8); + } + + sai->regmap = devm_regmap_init_mmio(dev, base, &fsl_sai_regmap_config); + if (IS_ERR(sai->regmap)) { + dev_err(dev, "regmap init failed\n"); + return PTR_ERR(sai->regmap); + } + + sai->bus_clk = devm_clk_get(dev, "bus"); + /* Compatible with old DTB cases */ + if (IS_ERR(sai->bus_clk) && PTR_ERR(sai->bus_clk) != -EPROBE_DEFER) + sai->bus_clk = devm_clk_get(dev, "sai"); + if (IS_ERR(sai->bus_clk)) { + dev_err(dev, "failed to get bus clock: %ld\n", + PTR_ERR(sai->bus_clk)); + /* -EPROBE_DEFER */ + return PTR_ERR(sai->bus_clk); + } + + for (i = 1; i < FSL_SAI_MCLK_MAX; i++) { + sprintf(tmp, "mclk%d", i); + sai->mclk_clk[i] = devm_clk_get(dev, tmp); + if (IS_ERR(sai->mclk_clk[i])) { + dev_err(dev, "failed to get mclk%d clock: %ld\n", + i, PTR_ERR(sai->mclk_clk[i])); + sai->mclk_clk[i] = NULL; + } + } + + if (sai->soc_data->mclk0_is_mclk1) + sai->mclk_clk[0] = sai->mclk_clk[1]; + else + sai->mclk_clk[0] = sai->bus_clk; + + fsl_asoc_get_pll_clocks(&pdev->dev, &sai->pll8k_clk, + &sai->pll11k_clk); + + /* Use Multi FIFO mode depending on the support from SDMA script */ + ret = of_property_read_u32_array(np, "dmas", dmas, 4); + if (!sai->soc_data->use_edma && !ret && dmas[2] == IMX_DMATYPE_MULTI_SAI) + sai->is_multi_fifo_dma = true; + + /* read dataline mask for rx and tx*/ + ret = fsl_sai_read_dlcfg(sai); + if (ret < 0) { + dev_err(dev, "failed to read dlcfg %d\n", ret); + return ret; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ret = devm_request_irq(dev, irq, fsl_sai_isr, IRQF_SHARED, + np->name, sai); + if (ret) { + dev_err(dev, "failed to claim irq %u\n", irq); + return ret; + } + + memcpy(&sai->cpu_dai_drv, &fsl_sai_dai_template, + sizeof(fsl_sai_dai_template)); + + /* Sync Tx with Rx as default by following old DT binding */ + sai->synchronous[RX] = true; + sai->synchronous[TX] = false; + sai->cpu_dai_drv.symmetric_rate = 1; + sai->cpu_dai_drv.symmetric_channels = 1; + sai->cpu_dai_drv.symmetric_sample_bits = 1; + + if (of_property_read_bool(np, "fsl,sai-synchronous-rx") && + of_property_read_bool(np, "fsl,sai-asynchronous")) { + /* error out if both synchronous and asynchronous are present */ + dev_err(dev, "invalid binding for synchronous mode\n"); + return -EINVAL; + } + + if (of_property_read_bool(np, "fsl,sai-synchronous-rx")) { + /* Sync Rx with Tx */ + sai->synchronous[RX] = false; + sai->synchronous[TX] = true; + } else if (of_property_read_bool(np, "fsl,sai-asynchronous")) { + /* Discard all settings for asynchronous mode */ + sai->synchronous[RX] = false; + sai->synchronous[TX] = false; + sai->cpu_dai_drv.symmetric_rate = 0; + sai->cpu_dai_drv.symmetric_channels = 0; + sai->cpu_dai_drv.symmetric_sample_bits = 0; + } + + sai->mclk_direction_output = of_property_read_bool(np, "fsl,sai-mclk-direction-output"); + + if (sai->mclk_direction_output && + of_device_is_compatible(np, "fsl,imx6ul-sai")) { + gpr = syscon_regmap_lookup_by_compatible("fsl,imx6ul-iomuxc-gpr"); + if (IS_ERR(gpr)) { + dev_err(dev, "cannot find iomuxc registers\n"); + return PTR_ERR(gpr); + } + + index = of_alias_get_id(np, "sai"); + if (index < 0) + return index; + + regmap_update_bits(gpr, IOMUXC_GPR1, MCLK_DIR(index), + MCLK_DIR(index)); + } + + sai->dma_params_rx.addr = sai->res->start + FSL_SAI_RDR0; + sai->dma_params_tx.addr = sai->res->start + FSL_SAI_TDR0; + sai->dma_params_rx.maxburst = + sai->soc_data->max_burst[RX] ? sai->soc_data->max_burst[RX] : FSL_SAI_MAXBURST_RX; + sai->dma_params_tx.maxburst = + sai->soc_data->max_burst[TX] ? sai->soc_data->max_burst[TX] : FSL_SAI_MAXBURST_TX; + + sai->pinctrl = devm_pinctrl_get(&pdev->dev); + + platform_set_drvdata(pdev, sai); + pm_runtime_enable(dev); + if (!pm_runtime_enabled(dev)) { + ret = fsl_sai_runtime_resume(dev); + if (ret) + goto err_pm_disable; + } + + ret = pm_runtime_resume_and_get(dev); + if (ret < 0) + goto err_pm_get_sync; + + /* Get sai version */ + ret = fsl_sai_check_version(dev); + if (ret < 0) + dev_warn(dev, "Error reading SAI version: %d\n", ret); + + /* Select MCLK direction */ + if (sai->mclk_direction_output && + sai->soc_data->max_register >= FSL_SAI_MCTL) { + regmap_update_bits(sai->regmap, FSL_SAI_MCTL, + FSL_SAI_MCTL_MCLK_EN, FSL_SAI_MCTL_MCLK_EN); + } + + ret = pm_runtime_put_sync(dev); + if (ret < 0 && ret != -ENOSYS) + goto err_pm_get_sync; + + /* + * Register platform component before registering cpu dai for there + * is not defer probe for platform component in snd_soc_add_pcm_runtime(). + */ + if (sai->soc_data->use_imx_pcm) { + ret = imx_pcm_dma_init(pdev); + if (ret) { + dev_err_probe(dev, ret, "PCM DMA init failed\n"); + if (!IS_ENABLED(CONFIG_SND_SOC_IMX_PCM_DMA)) + dev_err(dev, "Error: You must enable the imx-pcm-dma support!\n"); + goto err_pm_get_sync; + } + } else { + ret = devm_snd_dmaengine_pcm_register(dev, NULL, 0); + if (ret) { + dev_err_probe(dev, ret, "Registering PCM dmaengine failed\n"); + goto err_pm_get_sync; + } + } + + ret = devm_snd_soc_register_component(dev, &fsl_component, + &sai->cpu_dai_drv, 1); + if (ret) + goto err_pm_get_sync; + + return ret; + +err_pm_get_sync: + if (!pm_runtime_status_suspended(dev)) + fsl_sai_runtime_suspend(dev); +err_pm_disable: + pm_runtime_disable(dev); + + return ret; +} + +static void fsl_sai_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + if (!pm_runtime_status_suspended(&pdev->dev)) + fsl_sai_runtime_suspend(&pdev->dev); +} + +static const struct fsl_sai_soc_data fsl_sai_vf610_data = { + .use_imx_pcm = false, + .use_edma = false, + .fifo_depth = 32, + .pins = 1, + .reg_offset = 0, + .mclk0_is_mclk1 = false, + .flags = 0, + .max_register = FSL_SAI_RMR, +}; + +static const struct fsl_sai_soc_data fsl_sai_imx6sx_data = { + .use_imx_pcm = true, + .use_edma = false, + .fifo_depth = 32, + .pins = 1, + .reg_offset = 0, + .mclk0_is_mclk1 = true, + .flags = 0, + .max_register = FSL_SAI_RMR, +}; + +static const struct fsl_sai_soc_data fsl_sai_imx7ulp_data = { + .use_imx_pcm = true, + .use_edma = false, + .fifo_depth = 16, + .pins = 2, + .reg_offset = 8, + .mclk0_is_mclk1 = false, + .flags = PMQOS_CPU_LATENCY, + .max_register = FSL_SAI_RMR, +}; + +static const struct fsl_sai_soc_data fsl_sai_imx8mq_data = { + .use_imx_pcm = true, + .use_edma = false, + .fifo_depth = 128, + .pins = 8, + .reg_offset = 8, + .mclk0_is_mclk1 = false, + .flags = 0, + .max_register = FSL_SAI_RMR, +}; + +static const struct fsl_sai_soc_data fsl_sai_imx8qm_data = { + .use_imx_pcm = true, + .use_edma = true, + .fifo_depth = 64, + .pins = 4, + .reg_offset = 0, + .mclk0_is_mclk1 = false, + .flags = 0, + .max_register = FSL_SAI_RMR, +}; + +static const struct fsl_sai_soc_data fsl_sai_imx8mm_data = { + .use_imx_pcm = true, + .use_edma = false, + .fifo_depth = 128, + .reg_offset = 8, + .mclk0_is_mclk1 = false, + .pins = 8, + .flags = 0, + .max_register = FSL_SAI_MCTL, +}; + +static const struct fsl_sai_soc_data fsl_sai_imx8mn_data = { + .use_imx_pcm = true, + .use_edma = false, + .fifo_depth = 128, + .reg_offset = 8, + .mclk0_is_mclk1 = false, + .pins = 8, + .flags = 0, + .max_register = FSL_SAI_MDIV, +}; + +static const struct fsl_sai_soc_data fsl_sai_imx8mp_data = { + .use_imx_pcm = true, + .use_edma = false, + .fifo_depth = 128, + .reg_offset = 8, + .mclk0_is_mclk1 = false, + .pins = 8, + .flags = 0, + .max_register = FSL_SAI_MDIV, + .mclk_with_tere = true, +}; + +static const struct fsl_sai_soc_data fsl_sai_imx8ulp_data = { + .use_imx_pcm = true, + .use_edma = true, + .fifo_depth = 16, + .reg_offset = 8, + .mclk0_is_mclk1 = false, + .pins = 4, + .flags = PMQOS_CPU_LATENCY, + .max_register = FSL_SAI_RTCAP, +}; + +static const struct fsl_sai_soc_data fsl_sai_imx93_data = { + .use_imx_pcm = true, + .use_edma = true, + .fifo_depth = 128, + .reg_offset = 8, + .mclk0_is_mclk1 = false, + .pins = 4, + .flags = 0, + .max_register = FSL_SAI_MCTL, + .max_burst = {8, 8}, +}; + +static const struct of_device_id fsl_sai_ids[] = { + { .compatible = "fsl,vf610-sai", .data = &fsl_sai_vf610_data }, + { .compatible = "fsl,imx6sx-sai", .data = &fsl_sai_imx6sx_data }, + { .compatible = "fsl,imx6ul-sai", .data = &fsl_sai_imx6sx_data }, + { .compatible = "fsl,imx7ulp-sai", .data = &fsl_sai_imx7ulp_data }, + { .compatible = "fsl,imx8mq-sai", .data = &fsl_sai_imx8mq_data }, + { .compatible = "fsl,imx8qm-sai", .data = &fsl_sai_imx8qm_data }, + { .compatible = "fsl,imx8mm-sai", .data = &fsl_sai_imx8mm_data }, + { .compatible = "fsl,imx8mp-sai", .data = &fsl_sai_imx8mp_data }, + { .compatible = "fsl,imx8ulp-sai", .data = &fsl_sai_imx8ulp_data }, + { .compatible = "fsl,imx8mn-sai", .data = &fsl_sai_imx8mn_data }, + { .compatible = "fsl,imx93-sai", .data = &fsl_sai_imx93_data }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, fsl_sai_ids); + +static int fsl_sai_runtime_suspend(struct device *dev) +{ + struct fsl_sai *sai = dev_get_drvdata(dev); + + if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_CAPTURE)) + clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[0]]); + + if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_PLAYBACK)) + clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[1]]); + + clk_disable_unprepare(sai->bus_clk); + + if (sai->soc_data->flags & PMQOS_CPU_LATENCY) + cpu_latency_qos_remove_request(&sai->pm_qos_req); + + regcache_cache_only(sai->regmap, true); + + return 0; +} + +static int fsl_sai_runtime_resume(struct device *dev) +{ + struct fsl_sai *sai = dev_get_drvdata(dev); + unsigned int ofs = sai->soc_data->reg_offset; + int ret; + + ret = clk_prepare_enable(sai->bus_clk); + if (ret) { + dev_err(dev, "failed to enable bus clock: %d\n", ret); + return ret; + } + + if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_PLAYBACK)) { + ret = clk_prepare_enable(sai->mclk_clk[sai->mclk_id[1]]); + if (ret) + goto disable_bus_clk; + } + + if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_CAPTURE)) { + ret = clk_prepare_enable(sai->mclk_clk[sai->mclk_id[0]]); + if (ret) + goto disable_tx_clk; + } + + if (sai->soc_data->flags & PMQOS_CPU_LATENCY) + cpu_latency_qos_add_request(&sai->pm_qos_req, 0); + + regcache_cache_only(sai->regmap, false); + regcache_mark_dirty(sai->regmap); + regmap_write(sai->regmap, FSL_SAI_TCSR(ofs), FSL_SAI_CSR_SR); + regmap_write(sai->regmap, FSL_SAI_RCSR(ofs), FSL_SAI_CSR_SR); + usleep_range(1000, 2000); + regmap_write(sai->regmap, FSL_SAI_TCSR(ofs), 0); + regmap_write(sai->regmap, FSL_SAI_RCSR(ofs), 0); + + ret = regcache_sync(sai->regmap); + if (ret) + goto disable_rx_clk; + + if (sai->soc_data->mclk_with_tere && sai->mclk_direction_output) + regmap_update_bits(sai->regmap, FSL_SAI_TCSR(ofs), + FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE); + + return 0; + +disable_rx_clk: + if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_CAPTURE)) + clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[0]]); +disable_tx_clk: + if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_PLAYBACK)) + clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[1]]); +disable_bus_clk: + clk_disable_unprepare(sai->bus_clk); + + return ret; +} + +static const struct dev_pm_ops fsl_sai_pm_ops = { + SET_RUNTIME_PM_OPS(fsl_sai_runtime_suspend, + fsl_sai_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) +}; + +static struct platform_driver fsl_sai_driver = { + .probe = fsl_sai_probe, + .remove_new = fsl_sai_remove, + .driver = { + .name = "fsl-sai", + .pm = &fsl_sai_pm_ops, + .of_match_table = fsl_sai_ids, + }, +}; +module_platform_driver(fsl_sai_driver); + +MODULE_DESCRIPTION("Freescale Soc SAI Interface"); +MODULE_AUTHOR("Xiubo Li, <Li.Xiubo@freescale.com>"); +MODULE_ALIAS("platform:fsl-sai"); +MODULE_LICENSE("GPL"); |