| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * STM32 ALSA SoC Digital Audio Interface (SAI) driver. |
| * |
| * Copyright (C) 2016, STMicroelectronics - All Rights Reserved |
| * Author(s): Olivier Moysan <olivier.moysan@st.com> for STMicroelectronics. |
| */ |
| |
| #include <linux/clk.h> |
| #include <linux/clk-provider.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/of_irq.h> |
| #include <linux/of_platform.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/regmap.h> |
| |
| #include <sound/asoundef.h> |
| #include <sound/core.h> |
| #include <sound/dmaengine_pcm.h> |
| #include <sound/pcm_params.h> |
| |
| #include "stm32_sai.h" |
| |
| #define SAI_FREE_PROTOCOL 0x0 |
| #define SAI_SPDIF_PROTOCOL 0x1 |
| |
| #define SAI_SLOT_SIZE_AUTO 0x0 |
| #define SAI_SLOT_SIZE_16 0x1 |
| #define SAI_SLOT_SIZE_32 0x2 |
| |
| #define SAI_DATASIZE_8 0x2 |
| #define SAI_DATASIZE_10 0x3 |
| #define SAI_DATASIZE_16 0x4 |
| #define SAI_DATASIZE_20 0x5 |
| #define SAI_DATASIZE_24 0x6 |
| #define SAI_DATASIZE_32 0x7 |
| |
| #define STM_SAI_DAI_NAME_SIZE 15 |
| |
| #define STM_SAI_IS_PLAYBACK(ip) ((ip)->dir == SNDRV_PCM_STREAM_PLAYBACK) |
| #define STM_SAI_IS_CAPTURE(ip) ((ip)->dir == SNDRV_PCM_STREAM_CAPTURE) |
| |
| #define STM_SAI_A_ID 0x0 |
| #define STM_SAI_B_ID 0x1 |
| |
| #define STM_SAI_IS_SUB_A(x) ((x)->id == STM_SAI_A_ID) |
| |
| #define SAI_SYNC_NONE 0x0 |
| #define SAI_SYNC_INTERNAL 0x1 |
| #define SAI_SYNC_EXTERNAL 0x2 |
| |
| #define STM_SAI_PROTOCOL_IS_SPDIF(ip) ((ip)->spdif) |
| #define STM_SAI_HAS_SPDIF(x) ((x)->pdata->conf.has_spdif_pdm) |
| #define STM_SAI_HAS_PDM(x) ((x)->pdata->conf.has_spdif_pdm) |
| #define STM_SAI_HAS_EXT_SYNC(x) (!STM_SAI_IS_F4(sai->pdata)) |
| |
| #define SAI_IEC60958_BLOCK_FRAMES 192 |
| #define SAI_IEC60958_STATUS_BYTES 24 |
| |
| #define SAI_MCLK_NAME_LEN 32 |
| #define SAI_RATE_11K 11025 |
| |
| /** |
| * struct stm32_sai_sub_data - private data of SAI sub block (block A or B) |
| * @pdev: device data pointer |
| * @regmap: SAI register map pointer |
| * @regmap_config: SAI sub block register map configuration pointer |
| * @dma_params: dma configuration data for rx or tx channel |
| * @cpu_dai_drv: DAI driver data pointer |
| * @cpu_dai: DAI runtime data pointer |
| * @substream: PCM substream data pointer |
| * @pdata: SAI block parent data pointer |
| * @np_sync_provider: synchronization provider node |
| * @sai_ck: kernel clock feeding the SAI clock generator |
| * @sai_mclk: master clock from SAI mclk provider |
| * @phys_addr: SAI registers physical base address |
| * @mclk_rate: SAI block master clock frequency (Hz). set at init |
| * @id: SAI sub block id corresponding to sub-block A or B |
| * @dir: SAI block direction (playback or capture). set at init |
| * @master: SAI block mode flag. (true=master, false=slave) set at init |
| * @spdif: SAI S/PDIF iec60958 mode flag. set at init |
| * @fmt: SAI block format. relevant only for custom protocols. set at init |
| * @sync: SAI block synchronization mode. (none, internal or external) |
| * @synco: SAI block ext sync source (provider setting). (none, sub-block A/B) |
| * @synci: SAI block ext sync source (client setting). (SAI sync provider index) |
| * @fs_length: frame synchronization length. depends on protocol settings |
| * @slots: rx or tx slot number |
| * @slot_width: rx or tx slot width in bits |
| * @slot_mask: rx or tx active slots mask. set at init or at runtime |
| * @data_size: PCM data width. corresponds to PCM substream width. |
| * @spdif_frm_cnt: S/PDIF playback frame counter |
| * @iec958: iec958 data |
| * @ctrl_lock: control lock |
| * @irq_lock: prevent race condition with IRQ |
| */ |
| struct stm32_sai_sub_data { |
| struct platform_device *pdev; |
| struct regmap *regmap; |
| const struct regmap_config *regmap_config; |
| struct snd_dmaengine_dai_dma_data dma_params; |
| struct snd_soc_dai_driver cpu_dai_drv; |
| struct snd_soc_dai *cpu_dai; |
| struct snd_pcm_substream *substream; |
| struct stm32_sai_data *pdata; |
| struct device_node *np_sync_provider; |
| struct clk *sai_ck; |
| struct clk *sai_mclk; |
| dma_addr_t phys_addr; |
| unsigned int mclk_rate; |
| unsigned int id; |
| int dir; |
| bool master; |
| bool spdif; |
| int fmt; |
| int sync; |
| int synco; |
| int synci; |
| int fs_length; |
| int slots; |
| int slot_width; |
| int slot_mask; |
| int data_size; |
| unsigned int spdif_frm_cnt; |
| struct snd_aes_iec958 iec958; |
| struct mutex ctrl_lock; /* protect resources accessed by controls */ |
| spinlock_t irq_lock; /* used to prevent race condition with IRQ */ |
| }; |
| |
| enum stm32_sai_fifo_th { |
| STM_SAI_FIFO_TH_EMPTY, |
| STM_SAI_FIFO_TH_QUARTER, |
| STM_SAI_FIFO_TH_HALF, |
| STM_SAI_FIFO_TH_3_QUARTER, |
| STM_SAI_FIFO_TH_FULL, |
| }; |
| |
| static bool stm32_sai_sub_readable_reg(struct device *dev, unsigned int reg) |
| { |
| switch (reg) { |
| case STM_SAI_CR1_REGX: |
| case STM_SAI_CR2_REGX: |
| case STM_SAI_FRCR_REGX: |
| case STM_SAI_SLOTR_REGX: |
| case STM_SAI_IMR_REGX: |
| case STM_SAI_SR_REGX: |
| case STM_SAI_CLRFR_REGX: |
| case STM_SAI_DR_REGX: |
| case STM_SAI_PDMCR_REGX: |
| case STM_SAI_PDMLY_REGX: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static bool stm32_sai_sub_volatile_reg(struct device *dev, unsigned int reg) |
| { |
| switch (reg) { |
| case STM_SAI_DR_REGX: |
| case STM_SAI_SR_REGX: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static bool stm32_sai_sub_writeable_reg(struct device *dev, unsigned int reg) |
| { |
| switch (reg) { |
| case STM_SAI_CR1_REGX: |
| case STM_SAI_CR2_REGX: |
| case STM_SAI_FRCR_REGX: |
| case STM_SAI_SLOTR_REGX: |
| case STM_SAI_IMR_REGX: |
| case STM_SAI_CLRFR_REGX: |
| case STM_SAI_DR_REGX: |
| case STM_SAI_PDMCR_REGX: |
| case STM_SAI_PDMLY_REGX: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static int stm32_sai_sub_reg_up(struct stm32_sai_sub_data *sai, |
| unsigned int reg, unsigned int mask, |
| unsigned int val) |
| { |
| int ret; |
| |
| ret = clk_enable(sai->pdata->pclk); |
| if (ret < 0) |
| return ret; |
| |
| ret = regmap_update_bits(sai->regmap, reg, mask, val); |
| |
| clk_disable(sai->pdata->pclk); |
| |
| return ret; |
| } |
| |
| static int stm32_sai_sub_reg_wr(struct stm32_sai_sub_data *sai, |
| unsigned int reg, unsigned int mask, |
| unsigned int val) |
| { |
| int ret; |
| |
| ret = clk_enable(sai->pdata->pclk); |
| if (ret < 0) |
| return ret; |
| |
| ret = regmap_write_bits(sai->regmap, reg, mask, val); |
| |
| clk_disable(sai->pdata->pclk); |
| |
| return ret; |
| } |
| |
| static int stm32_sai_sub_reg_rd(struct stm32_sai_sub_data *sai, |
| unsigned int reg, unsigned int *val) |
| { |
| int ret; |
| |
| ret = clk_enable(sai->pdata->pclk); |
| if (ret < 0) |
| return ret; |
| |
| ret = regmap_read(sai->regmap, reg, val); |
| |
| clk_disable(sai->pdata->pclk); |
| |
| return ret; |
| } |
| |
| static const struct regmap_config stm32_sai_sub_regmap_config_f4 = { |
| .reg_bits = 32, |
| .reg_stride = 4, |
| .val_bits = 32, |
| .max_register = STM_SAI_DR_REGX, |
| .readable_reg = stm32_sai_sub_readable_reg, |
| .volatile_reg = stm32_sai_sub_volatile_reg, |
| .writeable_reg = stm32_sai_sub_writeable_reg, |
| .fast_io = true, |
| .cache_type = REGCACHE_FLAT, |
| }; |
| |
| static const struct regmap_config stm32_sai_sub_regmap_config_h7 = { |
| .reg_bits = 32, |
| .reg_stride = 4, |
| .val_bits = 32, |
| .max_register = STM_SAI_PDMLY_REGX, |
| .readable_reg = stm32_sai_sub_readable_reg, |
| .volatile_reg = stm32_sai_sub_volatile_reg, |
| .writeable_reg = stm32_sai_sub_writeable_reg, |
| .fast_io = true, |
| .cache_type = REGCACHE_FLAT, |
| }; |
| |
| static int snd_pcm_iec958_info(struct snd_kcontrol *kcontrol, |
| struct snd_ctl_elem_info *uinfo) |
| { |
| uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; |
| uinfo->count = 1; |
| |
| return 0; |
| } |
| |
| static int snd_pcm_iec958_get(struct snd_kcontrol *kcontrol, |
| struct snd_ctl_elem_value *uctl) |
| { |
| struct stm32_sai_sub_data *sai = snd_kcontrol_chip(kcontrol); |
| |
| mutex_lock(&sai->ctrl_lock); |
| memcpy(uctl->value.iec958.status, sai->iec958.status, 4); |
| mutex_unlock(&sai->ctrl_lock); |
| |
| return 0; |
| } |
| |
| static int snd_pcm_iec958_put(struct snd_kcontrol *kcontrol, |
| struct snd_ctl_elem_value *uctl) |
| { |
| struct stm32_sai_sub_data *sai = snd_kcontrol_chip(kcontrol); |
| |
| mutex_lock(&sai->ctrl_lock); |
| memcpy(sai->iec958.status, uctl->value.iec958.status, 4); |
| mutex_unlock(&sai->ctrl_lock); |
| |
| return 0; |
| } |
| |
| static const struct snd_kcontrol_new iec958_ctls = { |
| .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE | |
| SNDRV_CTL_ELEM_ACCESS_VOLATILE), |
| .iface = SNDRV_CTL_ELEM_IFACE_PCM, |
| .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT), |
| .info = snd_pcm_iec958_info, |
| .get = snd_pcm_iec958_get, |
| .put = snd_pcm_iec958_put, |
| }; |
| |
| struct stm32_sai_mclk_data { |
| struct clk_hw hw; |
| unsigned long freq; |
| struct stm32_sai_sub_data *sai_data; |
| }; |
| |
| #define to_mclk_data(_hw) container_of(_hw, struct stm32_sai_mclk_data, hw) |
| #define STM32_SAI_MAX_CLKS 1 |
| |
| static int stm32_sai_get_clk_div(struct stm32_sai_sub_data *sai, |
| unsigned long input_rate, |
| unsigned long output_rate) |
| { |
| int version = sai->pdata->conf.version; |
| int div; |
| |
| div = DIV_ROUND_CLOSEST(input_rate, output_rate); |
| if (div > SAI_XCR1_MCKDIV_MAX(version)) { |
| dev_err(&sai->pdev->dev, "Divider %d out of range\n", div); |
| return -EINVAL; |
| } |
| dev_dbg(&sai->pdev->dev, "SAI divider %d\n", div); |
| |
| if (input_rate % div) |
| dev_dbg(&sai->pdev->dev, |
| "Rate not accurate. requested (%ld), actual (%ld)\n", |
| output_rate, input_rate / div); |
| |
| return div; |
| } |
| |
| static int stm32_sai_set_clk_div(struct stm32_sai_sub_data *sai, |
| unsigned int div) |
| { |
| int version = sai->pdata->conf.version; |
| int ret, cr1, mask; |
| |
| if (div > SAI_XCR1_MCKDIV_MAX(version)) { |
| dev_err(&sai->pdev->dev, "Divider %d out of range\n", div); |
| return -EINVAL; |
| } |
| |
| mask = SAI_XCR1_MCKDIV_MASK(SAI_XCR1_MCKDIV_WIDTH(version)); |
| cr1 = SAI_XCR1_MCKDIV_SET(div); |
| ret = stm32_sai_sub_reg_up(sai, STM_SAI_CR1_REGX, mask, cr1); |
| if (ret < 0) |
| dev_err(&sai->pdev->dev, "Failed to update CR1 register\n"); |
| |
| return ret; |
| } |
| |
| static int stm32_sai_set_parent_clock(struct stm32_sai_sub_data *sai, |
| unsigned int rate) |
| { |
| struct platform_device *pdev = sai->pdev; |
| struct clk *parent_clk = sai->pdata->clk_x8k; |
| int ret; |
| |
| if (!(rate % SAI_RATE_11K)) |
| parent_clk = sai->pdata->clk_x11k; |
| |
| ret = clk_set_parent(sai->sai_ck, parent_clk); |
| if (ret) |
| dev_err(&pdev->dev, " Error %d setting sai_ck parent clock. %s", |
| ret, ret == -EBUSY ? |
| "Active stream rates conflict\n" : "\n"); |
| |
| return ret; |
| } |
| |
| static long stm32_sai_mclk_round_rate(struct clk_hw *hw, unsigned long rate, |
| unsigned long *prate) |
| { |
| struct stm32_sai_mclk_data *mclk = to_mclk_data(hw); |
| struct stm32_sai_sub_data *sai = mclk->sai_data; |
| int div; |
| |
| div = stm32_sai_get_clk_div(sai, *prate, rate); |
| if (div < 0) |
| return div; |
| |
| mclk->freq = *prate / div; |
| |
| return mclk->freq; |
| } |
| |
| static unsigned long stm32_sai_mclk_recalc_rate(struct clk_hw *hw, |
| unsigned long parent_rate) |
| { |
| struct stm32_sai_mclk_data *mclk = to_mclk_data(hw); |
| |
| return mclk->freq; |
| } |
| |
| static int stm32_sai_mclk_set_rate(struct clk_hw *hw, unsigned long rate, |
| unsigned long parent_rate) |
| { |
| struct stm32_sai_mclk_data *mclk = to_mclk_data(hw); |
| struct stm32_sai_sub_data *sai = mclk->sai_data; |
| int div, ret; |
| |
| div = stm32_sai_get_clk_div(sai, parent_rate, rate); |
| if (div < 0) |
| return div; |
| |
| ret = stm32_sai_set_clk_div(sai, div); |
| if (ret) |
| return ret; |
| |
| mclk->freq = rate; |
| |
| return 0; |
| } |
| |
| static int stm32_sai_mclk_enable(struct clk_hw *hw) |
| { |
| struct stm32_sai_mclk_data *mclk = to_mclk_data(hw); |
| struct stm32_sai_sub_data *sai = mclk->sai_data; |
| |
| dev_dbg(&sai->pdev->dev, "Enable master clock\n"); |
| |
| return stm32_sai_sub_reg_up(sai, STM_SAI_CR1_REGX, |
| SAI_XCR1_MCKEN, SAI_XCR1_MCKEN); |
| } |
| |
| static void stm32_sai_mclk_disable(struct clk_hw *hw) |
| { |
| struct stm32_sai_mclk_data *mclk = to_mclk_data(hw); |
| struct stm32_sai_sub_data *sai = mclk->sai_data; |
| |
| dev_dbg(&sai->pdev->dev, "Disable master clock\n"); |
| |
| stm32_sai_sub_reg_up(sai, STM_SAI_CR1_REGX, SAI_XCR1_MCKEN, 0); |
| } |
| |
| static const struct clk_ops mclk_ops = { |
| .enable = stm32_sai_mclk_enable, |
| .disable = stm32_sai_mclk_disable, |
| .recalc_rate = stm32_sai_mclk_recalc_rate, |
| .round_rate = stm32_sai_mclk_round_rate, |
| .set_rate = stm32_sai_mclk_set_rate, |
| }; |
| |
| static int stm32_sai_add_mclk_provider(struct stm32_sai_sub_data *sai) |
| { |
| struct clk_hw *hw; |
| struct stm32_sai_mclk_data *mclk; |
| struct device *dev = &sai->pdev->dev; |
| const char *pname = __clk_get_name(sai->sai_ck); |
| char *mclk_name, *p, *s = (char *)pname; |
| int ret, i = 0; |
| |
| mclk = devm_kzalloc(dev, sizeof(*mclk), GFP_KERNEL); |
| if (!mclk) |
| return -ENOMEM; |
| |
| mclk_name = devm_kcalloc(dev, sizeof(char), |
| SAI_MCLK_NAME_LEN, GFP_KERNEL); |
| if (!mclk_name) |
| return -ENOMEM; |
| |
| /* |
| * Forge mclk clock name from parent clock name and suffix. |
| * String after "_" char is stripped in parent name. |
| */ |
| p = mclk_name; |
| while (*s && *s != '_' && (i < (SAI_MCLK_NAME_LEN - 7))) { |
| *p++ = *s++; |
| i++; |
| } |
| STM_SAI_IS_SUB_A(sai) ? strcat(p, "a_mclk") : strcat(p, "b_mclk"); |
| |
| mclk->hw.init = CLK_HW_INIT(mclk_name, pname, &mclk_ops, 0); |
| mclk->sai_data = sai; |
| hw = &mclk->hw; |
| |
| dev_dbg(dev, "Register master clock %s\n", mclk_name); |
| ret = devm_clk_hw_register(&sai->pdev->dev, hw); |
| if (ret) { |
| dev_err(dev, "mclk register returned %d\n", ret); |
| return ret; |
| } |
| sai->sai_mclk = hw->clk; |
| |
| /* register mclk provider */ |
| return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, hw); |
| } |
| |
| static irqreturn_t stm32_sai_isr(int irq, void *devid) |
| { |
| struct stm32_sai_sub_data *sai = (struct stm32_sai_sub_data *)devid; |
| struct platform_device *pdev = sai->pdev; |
| unsigned int sr, imr, flags; |
| snd_pcm_state_t status = SNDRV_PCM_STATE_RUNNING; |
| |
| stm32_sai_sub_reg_rd(sai, STM_SAI_IMR_REGX, &imr); |
| stm32_sai_sub_reg_rd(sai, STM_SAI_SR_REGX, &sr); |
| |
| flags = sr & imr; |
| if (!flags) |
| return IRQ_NONE; |
| |
| stm32_sai_sub_reg_wr(sai, STM_SAI_CLRFR_REGX, SAI_XCLRFR_MASK, |
| SAI_XCLRFR_MASK); |
| |
| if (!sai->substream) { |
| dev_err(&pdev->dev, "Device stopped. Spurious IRQ 0x%x\n", sr); |
| return IRQ_NONE; |
| } |
| |
| if (flags & SAI_XIMR_OVRUDRIE) { |
| dev_err(&pdev->dev, "IRQ %s\n", |
| STM_SAI_IS_PLAYBACK(sai) ? "underrun" : "overrun"); |
| status = SNDRV_PCM_STATE_XRUN; |
| } |
| |
| if (flags & SAI_XIMR_MUTEDETIE) |
| dev_dbg(&pdev->dev, "IRQ mute detected\n"); |
| |
| if (flags & SAI_XIMR_WCKCFGIE) { |
| dev_err(&pdev->dev, "IRQ wrong clock configuration\n"); |
| status = SNDRV_PCM_STATE_DISCONNECTED; |
| } |
| |
| if (flags & SAI_XIMR_CNRDYIE) |
| dev_err(&pdev->dev, "IRQ Codec not ready\n"); |
| |
| if (flags & SAI_XIMR_AFSDETIE) { |
| dev_err(&pdev->dev, "IRQ Anticipated frame synchro\n"); |
| status = SNDRV_PCM_STATE_XRUN; |
| } |
| |
| if (flags & SAI_XIMR_LFSDETIE) { |
| dev_err(&pdev->dev, "IRQ Late frame synchro\n"); |
| status = SNDRV_PCM_STATE_XRUN; |
| } |
| |
| spin_lock(&sai->irq_lock); |
| if (status != SNDRV_PCM_STATE_RUNNING && sai->substream) |
| snd_pcm_stop_xrun(sai->substream); |
| spin_unlock(&sai->irq_lock); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int stm32_sai_set_sysclk(struct snd_soc_dai *cpu_dai, |
| int clk_id, unsigned int freq, int dir) |
| { |
| struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| int ret; |
| |
| if (dir == SND_SOC_CLOCK_OUT && sai->sai_mclk) { |
| ret = stm32_sai_sub_reg_up(sai, STM_SAI_CR1_REGX, |
| SAI_XCR1_NODIV, |
| freq ? 0 : SAI_XCR1_NODIV); |
| if (ret < 0) |
| return ret; |
| |
| /* Assume shutdown if requested frequency is 0Hz */ |
| if (!freq) { |
| /* Release mclk rate only if rate was actually set */ |
| if (sai->mclk_rate) { |
| clk_rate_exclusive_put(sai->sai_mclk); |
| sai->mclk_rate = 0; |
| } |
| return 0; |
| } |
| |
| /* If master clock is used, set parent clock now */ |
| ret = stm32_sai_set_parent_clock(sai, freq); |
| if (ret) |
| return ret; |
| |
| ret = clk_set_rate_exclusive(sai->sai_mclk, freq); |
| if (ret) { |
| dev_err(cpu_dai->dev, |
| ret == -EBUSY ? |
| "Active streams have incompatible rates" : |
| "Could not set mclk rate\n"); |
| return ret; |
| } |
| |
| dev_dbg(cpu_dai->dev, "SAI MCLK frequency is %uHz\n", freq); |
| sai->mclk_rate = freq; |
| } |
| |
| return 0; |
| } |
| |
| static int stm32_sai_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask, |
| u32 rx_mask, int slots, int slot_width) |
| { |
| struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| int slotr, slotr_mask, slot_size; |
| |
| if (STM_SAI_PROTOCOL_IS_SPDIF(sai)) { |
| dev_warn(cpu_dai->dev, "Slot setting relevant only for TDM\n"); |
| return 0; |
| } |
| |
| dev_dbg(cpu_dai->dev, "Masks tx/rx:%#x/%#x, slots:%d, width:%d\n", |
| tx_mask, rx_mask, slots, slot_width); |
| |
| switch (slot_width) { |
| case 16: |
| slot_size = SAI_SLOT_SIZE_16; |
| break; |
| case 32: |
| slot_size = SAI_SLOT_SIZE_32; |
| break; |
| default: |
| slot_size = SAI_SLOT_SIZE_AUTO; |
| break; |
| } |
| |
| slotr = SAI_XSLOTR_SLOTSZ_SET(slot_size) | |
| SAI_XSLOTR_NBSLOT_SET(slots - 1); |
| slotr_mask = SAI_XSLOTR_SLOTSZ_MASK | SAI_XSLOTR_NBSLOT_MASK; |
| |
| /* tx/rx mask set in machine init, if slot number defined in DT */ |
| if (STM_SAI_IS_PLAYBACK(sai)) { |
| sai->slot_mask = tx_mask; |
| slotr |= SAI_XSLOTR_SLOTEN_SET(tx_mask); |
| } |
| |
| if (STM_SAI_IS_CAPTURE(sai)) { |
| sai->slot_mask = rx_mask; |
| slotr |= SAI_XSLOTR_SLOTEN_SET(rx_mask); |
| } |
| |
| slotr_mask |= SAI_XSLOTR_SLOTEN_MASK; |
| |
| stm32_sai_sub_reg_up(sai, STM_SAI_SLOTR_REGX, slotr_mask, slotr); |
| |
| sai->slot_width = slot_width; |
| sai->slots = slots; |
| |
| return 0; |
| } |
| |
| static int stm32_sai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) |
| { |
| struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| int cr1, frcr = 0; |
| int cr1_mask, frcr_mask = 0; |
| int ret; |
| |
| dev_dbg(cpu_dai->dev, "fmt %x\n", fmt); |
| |
| /* Do not generate master by default */ |
| cr1 = SAI_XCR1_NODIV; |
| cr1_mask = SAI_XCR1_NODIV; |
| |
| cr1_mask |= SAI_XCR1_PRTCFG_MASK; |
| if (STM_SAI_PROTOCOL_IS_SPDIF(sai)) { |
| cr1 |= SAI_XCR1_PRTCFG_SET(SAI_SPDIF_PROTOCOL); |
| goto conf_update; |
| } |
| |
| cr1 |= SAI_XCR1_PRTCFG_SET(SAI_FREE_PROTOCOL); |
| |
| switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| /* SCK active high for all protocols */ |
| case SND_SOC_DAIFMT_I2S: |
| cr1 |= SAI_XCR1_CKSTR; |
| frcr |= SAI_XFRCR_FSOFF | SAI_XFRCR_FSDEF; |
| break; |
| /* Left justified */ |
| case SND_SOC_DAIFMT_MSB: |
| frcr |= SAI_XFRCR_FSPOL | SAI_XFRCR_FSDEF; |
| break; |
| /* Right justified */ |
| case SND_SOC_DAIFMT_LSB: |
| frcr |= SAI_XFRCR_FSPOL | SAI_XFRCR_FSDEF; |
| break; |
| case SND_SOC_DAIFMT_DSP_A: |
| frcr |= SAI_XFRCR_FSPOL | SAI_XFRCR_FSOFF; |
| break; |
| case SND_SOC_DAIFMT_DSP_B: |
| frcr |= SAI_XFRCR_FSPOL; |
| break; |
| default: |
| dev_err(cpu_dai->dev, "Unsupported protocol %#x\n", |
| fmt & SND_SOC_DAIFMT_FORMAT_MASK); |
| return -EINVAL; |
| } |
| |
| cr1_mask |= SAI_XCR1_CKSTR; |
| frcr_mask |= SAI_XFRCR_FSPOL | SAI_XFRCR_FSOFF | |
| SAI_XFRCR_FSDEF; |
| |
| /* DAI clock strobing. Invert setting previously set */ |
| switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
| case SND_SOC_DAIFMT_NB_NF: |
| break; |
| case SND_SOC_DAIFMT_IB_NF: |
| cr1 ^= SAI_XCR1_CKSTR; |
| break; |
| case SND_SOC_DAIFMT_NB_IF: |
| frcr ^= SAI_XFRCR_FSPOL; |
| break; |
| case SND_SOC_DAIFMT_IB_IF: |
| /* Invert fs & sck */ |
| cr1 ^= SAI_XCR1_CKSTR; |
| frcr ^= SAI_XFRCR_FSPOL; |
| break; |
| default: |
| dev_err(cpu_dai->dev, "Unsupported strobing %#x\n", |
| fmt & SND_SOC_DAIFMT_INV_MASK); |
| return -EINVAL; |
| } |
| cr1_mask |= SAI_XCR1_CKSTR; |
| frcr_mask |= SAI_XFRCR_FSPOL; |
| |
| stm32_sai_sub_reg_up(sai, STM_SAI_FRCR_REGX, frcr_mask, frcr); |
| |
| /* DAI clock master masks */ |
| switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { |
| case SND_SOC_DAIFMT_BC_FC: |
| /* codec is master */ |
| cr1 |= SAI_XCR1_SLAVE; |
| sai->master = false; |
| break; |
| case SND_SOC_DAIFMT_BP_FP: |
| sai->master = true; |
| break; |
| default: |
| dev_err(cpu_dai->dev, "Unsupported mode %#x\n", |
| fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK); |
| return -EINVAL; |
| } |
| |
| /* Set slave mode if sub-block is synchronized with another SAI */ |
| if (sai->sync) { |
| dev_dbg(cpu_dai->dev, "Synchronized SAI configured as slave\n"); |
| cr1 |= SAI_XCR1_SLAVE; |
| sai->master = false; |
| } |
| |
| cr1_mask |= SAI_XCR1_SLAVE; |
| |
| conf_update: |
| ret = stm32_sai_sub_reg_up(sai, STM_SAI_CR1_REGX, cr1_mask, cr1); |
| if (ret < 0) { |
| dev_err(cpu_dai->dev, "Failed to update CR1 register\n"); |
| return ret; |
| } |
| |
| sai->fmt = fmt; |
| |
| return 0; |
| } |
| |
| static int stm32_sai_startup(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *cpu_dai) |
| { |
| struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| int imr, cr2, ret; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&sai->irq_lock, flags); |
| sai->substream = substream; |
| spin_unlock_irqrestore(&sai->irq_lock, flags); |
| |
| if (STM_SAI_PROTOCOL_IS_SPDIF(sai)) { |
| snd_pcm_hw_constraint_mask64(substream->runtime, |
| SNDRV_PCM_HW_PARAM_FORMAT, |
| SNDRV_PCM_FMTBIT_S32_LE); |
| snd_pcm_hw_constraint_single(substream->runtime, |
| SNDRV_PCM_HW_PARAM_CHANNELS, 2); |
| } |
| |
| ret = clk_prepare_enable(sai->sai_ck); |
| if (ret < 0) { |
| dev_err(cpu_dai->dev, "Failed to enable clock: %d\n", ret); |
| return ret; |
| } |
| |
| /* Enable ITs */ |
| stm32_sai_sub_reg_wr(sai, STM_SAI_CLRFR_REGX, |
| SAI_XCLRFR_MASK, SAI_XCLRFR_MASK); |
| |
| imr = SAI_XIMR_OVRUDRIE; |
| if (STM_SAI_IS_CAPTURE(sai)) { |
| stm32_sai_sub_reg_rd(sai, STM_SAI_CR2_REGX, &cr2); |
| if (cr2 & SAI_XCR2_MUTECNT_MASK) |
| imr |= SAI_XIMR_MUTEDETIE; |
| } |
| |
| if (sai->master) |
| imr |= SAI_XIMR_WCKCFGIE; |
| else |
| imr |= SAI_XIMR_AFSDETIE | SAI_XIMR_LFSDETIE; |
| |
| stm32_sai_sub_reg_up(sai, STM_SAI_IMR_REGX, |
| SAI_XIMR_MASK, imr); |
| |
| return 0; |
| } |
| |
| static int stm32_sai_set_config(struct snd_soc_dai *cpu_dai, |
| struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params) |
| { |
| struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| int cr1, cr1_mask, ret; |
| |
| /* |
| * DMA bursts increment is set to 4 words. |
| * SAI fifo threshold is set to half fifo, to keep enough space |
| * for DMA incoming bursts. |
| */ |
| stm32_sai_sub_reg_wr(sai, STM_SAI_CR2_REGX, |
| SAI_XCR2_FFLUSH | SAI_XCR2_FTH_MASK, |
| SAI_XCR2_FFLUSH | |
| SAI_XCR2_FTH_SET(STM_SAI_FIFO_TH_HALF)); |
| |
| /* DS bits in CR1 not set for SPDIF (size forced to 24 bits).*/ |
| if (STM_SAI_PROTOCOL_IS_SPDIF(sai)) { |
| sai->spdif_frm_cnt = 0; |
| return 0; |
| } |
| |
| /* Mode, data format and channel config */ |
| cr1_mask = SAI_XCR1_DS_MASK; |
| switch (params_format(params)) { |
| case SNDRV_PCM_FORMAT_S8: |
| cr1 = SAI_XCR1_DS_SET(SAI_DATASIZE_8); |
| break; |
| case SNDRV_PCM_FORMAT_S16_LE: |
| cr1 = SAI_XCR1_DS_SET(SAI_DATASIZE_16); |
| break; |
| case SNDRV_PCM_FORMAT_S32_LE: |
| cr1 = SAI_XCR1_DS_SET(SAI_DATASIZE_32); |
| break; |
| default: |
| dev_err(cpu_dai->dev, "Data format not supported\n"); |
| return -EINVAL; |
| } |
| |
| cr1_mask |= SAI_XCR1_MONO; |
| if ((sai->slots == 2) && (params_channels(params) == 1)) |
| cr1 |= SAI_XCR1_MONO; |
| |
| ret = stm32_sai_sub_reg_up(sai, STM_SAI_CR1_REGX, cr1_mask, cr1); |
| if (ret < 0) { |
| dev_err(cpu_dai->dev, "Failed to update CR1 register\n"); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int stm32_sai_set_slots(struct snd_soc_dai *cpu_dai) |
| { |
| struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| int slotr, slot_sz; |
| |
| stm32_sai_sub_reg_rd(sai, STM_SAI_SLOTR_REGX, &slotr); |
| |
| /* |
| * If SLOTSZ is set to auto in SLOTR, align slot width on data size |
| * By default slot width = data size, if not forced from DT |
| */ |
| slot_sz = slotr & SAI_XSLOTR_SLOTSZ_MASK; |
| if (slot_sz == SAI_XSLOTR_SLOTSZ_SET(SAI_SLOT_SIZE_AUTO)) |
| sai->slot_width = sai->data_size; |
| |
| if (sai->slot_width < sai->data_size) { |
| dev_err(cpu_dai->dev, |
| "Data size %d larger than slot width\n", |
| sai->data_size); |
| return -EINVAL; |
| } |
| |
| /* Slot number is set to 2, if not specified in DT */ |
| if (!sai->slots) |
| sai->slots = 2; |
| |
| /* The number of slots in the audio frame is equal to NBSLOT[3:0] + 1*/ |
| stm32_sai_sub_reg_up(sai, STM_SAI_SLOTR_REGX, |
| SAI_XSLOTR_NBSLOT_MASK, |
| SAI_XSLOTR_NBSLOT_SET((sai->slots - 1))); |
| |
| /* Set default slots mask if not already set from DT */ |
| if (!(slotr & SAI_XSLOTR_SLOTEN_MASK)) { |
| sai->slot_mask = (1 << sai->slots) - 1; |
| stm32_sai_sub_reg_up(sai, |
| STM_SAI_SLOTR_REGX, SAI_XSLOTR_SLOTEN_MASK, |
| SAI_XSLOTR_SLOTEN_SET(sai->slot_mask)); |
| } |
| |
| dev_dbg(cpu_dai->dev, "Slots %d, slot width %d\n", |
| sai->slots, sai->slot_width); |
| |
| return 0; |
| } |
| |
| static void stm32_sai_set_frame(struct snd_soc_dai *cpu_dai) |
| { |
| struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| int fs_active, offset, format; |
| int frcr, frcr_mask; |
| |
| format = sai->fmt & SND_SOC_DAIFMT_FORMAT_MASK; |
| sai->fs_length = sai->slot_width * sai->slots; |
| |
| fs_active = sai->fs_length / 2; |
| if ((format == SND_SOC_DAIFMT_DSP_A) || |
| (format == SND_SOC_DAIFMT_DSP_B)) |
| fs_active = 1; |
| |
| frcr = SAI_XFRCR_FRL_SET((sai->fs_length - 1)); |
| frcr |= SAI_XFRCR_FSALL_SET((fs_active - 1)); |
| frcr_mask = SAI_XFRCR_FRL_MASK | SAI_XFRCR_FSALL_MASK; |
| |
| dev_dbg(cpu_dai->dev, "Frame length %d, frame active %d\n", |
| sai->fs_length, fs_active); |
| |
| stm32_sai_sub_reg_up(sai, STM_SAI_FRCR_REGX, frcr_mask, frcr); |
| |
| if ((sai->fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_LSB) { |
| offset = sai->slot_width - sai->data_size; |
| |
| stm32_sai_sub_reg_up(sai, STM_SAI_SLOTR_REGX, |
| SAI_XSLOTR_FBOFF_MASK, |
| SAI_XSLOTR_FBOFF_SET(offset)); |
| } |
| } |
| |
| static void stm32_sai_init_iec958_status(struct stm32_sai_sub_data *sai) |
| { |
| unsigned char *cs = sai->iec958.status; |
| |
| cs[0] = IEC958_AES0_CON_NOT_COPYRIGHT | IEC958_AES0_CON_EMPHASIS_NONE; |
| cs[1] = IEC958_AES1_CON_GENERAL; |
| cs[2] = IEC958_AES2_CON_SOURCE_UNSPEC | IEC958_AES2_CON_CHANNEL_UNSPEC; |
| cs[3] = IEC958_AES3_CON_CLOCK_1000PPM | IEC958_AES3_CON_FS_NOTID; |
| } |
| |
| static void stm32_sai_set_iec958_status(struct stm32_sai_sub_data *sai, |
| struct snd_pcm_runtime *runtime) |
| { |
| if (!runtime) |
| return; |
| |
| /* Force the sample rate according to runtime rate */ |
| mutex_lock(&sai->ctrl_lock); |
| switch (runtime->rate) { |
| case 22050: |
| sai->iec958.status[3] = IEC958_AES3_CON_FS_22050; |
| break; |
| case 44100: |
| sai->iec958.status[3] = IEC958_AES3_CON_FS_44100; |
| break; |
| case 88200: |
| sai->iec958.status[3] = IEC958_AES3_CON_FS_88200; |
| break; |
| case 176400: |
| sai->iec958.status[3] = IEC958_AES3_CON_FS_176400; |
| break; |
| case 24000: |
| sai->iec958.status[3] = IEC958_AES3_CON_FS_24000; |
| break; |
| case 48000: |
| sai->iec958.status[3] = IEC958_AES3_CON_FS_48000; |
| break; |
| case 96000: |
| sai->iec958.status[3] = IEC958_AES3_CON_FS_96000; |
| break; |
| case 192000: |
| sai->iec958.status[3] = IEC958_AES3_CON_FS_192000; |
| break; |
| case 32000: |
| sai->iec958.status[3] = IEC958_AES3_CON_FS_32000; |
| break; |
| default: |
| sai->iec958.status[3] = IEC958_AES3_CON_FS_NOTID; |
| break; |
| } |
| mutex_unlock(&sai->ctrl_lock); |
| } |
| |
| static int stm32_sai_configure_clock(struct snd_soc_dai *cpu_dai, |
| struct snd_pcm_hw_params *params) |
| { |
| struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| int div = 0, cr1 = 0; |
| int sai_clk_rate, mclk_ratio, den; |
| unsigned int rate = params_rate(params); |
| int ret; |
| |
| if (!sai->sai_mclk) { |
| ret = stm32_sai_set_parent_clock(sai, rate); |
| if (ret) |
| return ret; |
| } |
| sai_clk_rate = clk_get_rate(sai->sai_ck); |
| |
| if (STM_SAI_IS_F4(sai->pdata)) { |
| /* mclk on (NODIV=0) |
| * mclk_rate = 256 * fs |
| * MCKDIV = 0 if sai_ck < 3/2 * mclk_rate |
| * MCKDIV = sai_ck / (2 * mclk_rate) otherwise |
| * mclk off (NODIV=1) |
| * MCKDIV ignored. sck = sai_ck |
| */ |
| if (!sai->mclk_rate) |
| return 0; |
| |
| if (2 * sai_clk_rate >= 3 * sai->mclk_rate) { |
| div = stm32_sai_get_clk_div(sai, sai_clk_rate, |
| 2 * sai->mclk_rate); |
| if (div < 0) |
| return div; |
| } |
| } else { |
| /* |
| * TDM mode : |
| * mclk on |
| * MCKDIV = sai_ck / (ws x 256) (NOMCK=0. OSR=0) |
| * MCKDIV = sai_ck / (ws x 512) (NOMCK=0. OSR=1) |
| * mclk off |
| * MCKDIV = sai_ck / (frl x ws) (NOMCK=1) |
| * Note: NOMCK/NODIV correspond to same bit. |
| */ |
| if (STM_SAI_PROTOCOL_IS_SPDIF(sai)) { |
| div = stm32_sai_get_clk_div(sai, sai_clk_rate, |
| rate * 128); |
| if (div < 0) |
| return div; |
| } else { |
| if (sai->mclk_rate) { |
| mclk_ratio = sai->mclk_rate / rate; |
| if (mclk_ratio == 512) { |
| cr1 = SAI_XCR1_OSR; |
| } else if (mclk_ratio != 256) { |
| dev_err(cpu_dai->dev, |
| "Wrong mclk ratio %d\n", |
| mclk_ratio); |
| return -EINVAL; |
| } |
| |
| stm32_sai_sub_reg_up(sai, |
| STM_SAI_CR1_REGX, |
| SAI_XCR1_OSR, cr1); |
| |
| div = stm32_sai_get_clk_div(sai, sai_clk_rate, |
| sai->mclk_rate); |
| if (div < 0) |
| return div; |
| } else { |
| /* mclk-fs not set, master clock not active */ |
| den = sai->fs_length * params_rate(params); |
| div = stm32_sai_get_clk_div(sai, sai_clk_rate, |
| den); |
| if (div < 0) |
| return div; |
| } |
| } |
| } |
| |
| return stm32_sai_set_clk_div(sai, div); |
| } |
| |
| static int stm32_sai_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params, |
| struct snd_soc_dai *cpu_dai) |
| { |
| struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| int ret; |
| |
| sai->data_size = params_width(params); |
| |
| if (STM_SAI_PROTOCOL_IS_SPDIF(sai)) { |
| /* Rate not already set in runtime structure */ |
| substream->runtime->rate = params_rate(params); |
| stm32_sai_set_iec958_status(sai, substream->runtime); |
| } else { |
| ret = stm32_sai_set_slots(cpu_dai); |
| if (ret < 0) |
| return ret; |
| stm32_sai_set_frame(cpu_dai); |
| } |
| |
| ret = stm32_sai_set_config(cpu_dai, substream, params); |
| if (ret) |
| return ret; |
| |
| if (sai->master) |
| ret = stm32_sai_configure_clock(cpu_dai, params); |
| |
| return ret; |
| } |
| |
| static int stm32_sai_trigger(struct snd_pcm_substream *substream, int cmd, |
| struct snd_soc_dai *cpu_dai) |
| { |
| struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| int ret; |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| case SNDRV_PCM_TRIGGER_RESUME: |
| case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| dev_dbg(cpu_dai->dev, "Enable DMA and SAI\n"); |
| |
| stm32_sai_sub_reg_up(sai, STM_SAI_CR1_REGX, |
| SAI_XCR1_DMAEN, SAI_XCR1_DMAEN); |
| |
| /* Enable SAI */ |
| ret = stm32_sai_sub_reg_up(sai, STM_SAI_CR1_REGX, |
| SAI_XCR1_SAIEN, SAI_XCR1_SAIEN); |
| if (ret < 0) |
| dev_err(cpu_dai->dev, "Failed to update CR1 register\n"); |
| break; |
| case SNDRV_PCM_TRIGGER_SUSPEND: |
| case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| case SNDRV_PCM_TRIGGER_STOP: |
| dev_dbg(cpu_dai->dev, "Disable DMA and SAI\n"); |
| |
| stm32_sai_sub_reg_up(sai, STM_SAI_IMR_REGX, |
| SAI_XIMR_MASK, 0); |
| |
| stm32_sai_sub_reg_up(sai, STM_SAI_CR1_REGX, |
| SAI_XCR1_SAIEN, |
| (unsigned int)~SAI_XCR1_SAIEN); |
| |
| ret = stm32_sai_sub_reg_up(sai, STM_SAI_CR1_REGX, |
| SAI_XCR1_DMAEN, |
| (unsigned int)~SAI_XCR1_DMAEN); |
| if (ret < 0) |
| dev_err(cpu_dai->dev, "Failed to update CR1 register\n"); |
| |
| if (STM_SAI_PROTOCOL_IS_SPDIF(sai)) |
| sai->spdif_frm_cnt = 0; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| static void stm32_sai_shutdown(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *cpu_dai) |
| { |
| struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai); |
| unsigned long flags; |
| |
| stm32_sai_sub_reg_up(sai, STM_SAI_IMR_REGX, SAI_XIMR_MASK, 0); |
| |
| clk_disable_unprepare(sai->sai_ck); |
| |
| spin_lock_irqsave(&sai->irq_lock, flags); |
| sai->substream = NULL; |
| spin_unlock_irqrestore(&sai->irq_lock, flags); |
| } |
| |
| static int stm32_sai_pcm_new(struct snd_soc_pcm_runtime *rtd, |
| struct snd_soc_dai *cpu_dai) |
| { |
| struct stm32_sai_sub_data *sai = dev_get_drvdata(cpu_dai->dev); |
| struct snd_kcontrol_new knew = iec958_ctls; |
| |
| if (STM_SAI_PROTOCOL_IS_SPDIF(sai)) { |
| dev_dbg(&sai->pdev->dev, "%s: register iec controls", __func__); |
| knew.device = rtd->pcm->device; |
| return snd_ctl_add(rtd->pcm->card, snd_ctl_new1(&knew, sai)); |
| } |
| |
| return 0; |
| } |
| |
| static int stm32_sai_dai_probe(struct snd_soc_dai *cpu_dai) |
| { |
| struct stm32_sai_sub_data *sai = dev_get_drvdata(cpu_dai->dev); |
| int cr1 = 0, cr1_mask, ret; |
| |
| sai->cpu_dai = cpu_dai; |
| |
| sai->dma_params.addr = (dma_addr_t)(sai->phys_addr + STM_SAI_DR_REGX); |
| /* |
| * DMA supports 4, 8 or 16 burst sizes. Burst size 4 is the best choice, |
| * as it allows bytes, half-word and words transfers. (See DMA fifos |
| * constraints). |
| */ |
| sai->dma_params.maxburst = 4; |
| if (sai->pdata->conf.fifo_size < 8) |
| sai->dma_params.maxburst = 1; |
| /* Buswidth will be set by framework at runtime */ |
| sai->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_UNDEFINED; |
| |
| if (STM_SAI_IS_PLAYBACK(sai)) |
| snd_soc_dai_init_dma_data(cpu_dai, &sai->dma_params, NULL); |
| else |
| snd_soc_dai_init_dma_data(cpu_dai, NULL, &sai->dma_params); |
| |
| /* Next settings are not relevant for spdif mode */ |
| if (STM_SAI_PROTOCOL_IS_SPDIF(sai)) |
| return 0; |
| |
| cr1_mask = SAI_XCR1_RX_TX; |
| if (STM_SAI_IS_CAPTURE(sai)) |
| cr1 |= SAI_XCR1_RX_TX; |
| |
| /* Configure synchronization */ |
| if (sai->sync == SAI_SYNC_EXTERNAL) { |
| /* Configure synchro client and provider */ |
| ret = sai->pdata->set_sync(sai->pdata, sai->np_sync_provider, |
| sai->synco, sai->synci); |
| if (ret) |
| return ret; |
| } |
| |
| cr1_mask |= SAI_XCR1_SYNCEN_MASK; |
| cr1 |= SAI_XCR1_SYNCEN_SET(sai->sync); |
| |
| return stm32_sai_sub_reg_up(sai, STM_SAI_CR1_REGX, cr1_mask, cr1); |
| } |
| |
| static const struct snd_soc_dai_ops stm32_sai_pcm_dai_ops = { |
| .set_sysclk = stm32_sai_set_sysclk, |
| .set_fmt = stm32_sai_set_dai_fmt, |
| .set_tdm_slot = stm32_sai_set_dai_tdm_slot, |
| .startup = stm32_sai_startup, |
| .hw_params = stm32_sai_hw_params, |
| .trigger = stm32_sai_trigger, |
| .shutdown = stm32_sai_shutdown, |
| }; |
| |
| static int stm32_sai_pcm_process_spdif(struct snd_pcm_substream *substream, |
| int channel, unsigned long hwoff, |
| void *buf, unsigned long bytes) |
| { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); |
| struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); |
| struct stm32_sai_sub_data *sai = dev_get_drvdata(cpu_dai->dev); |
| int *ptr = (int *)(runtime->dma_area + hwoff + |
| channel * (runtime->dma_bytes / runtime->channels)); |
| ssize_t cnt = bytes_to_samples(runtime, bytes); |
| unsigned int frm_cnt = sai->spdif_frm_cnt; |
| unsigned int byte; |
| unsigned int mask; |
| |
| do { |
| *ptr = ((*ptr >> 8) & 0x00ffffff); |
| |
| /* Set channel status bit */ |
| byte = frm_cnt >> 3; |
| mask = 1 << (frm_cnt - (byte << 3)); |
| if (sai->iec958.status[byte] & mask) |
| *ptr |= 0x04000000; |
| ptr++; |
| |
| if (!(cnt % 2)) |
| frm_cnt++; |
| |
| if (frm_cnt == SAI_IEC60958_BLOCK_FRAMES) |
| frm_cnt = 0; |
| } while (--cnt); |
| sai->spdif_frm_cnt = frm_cnt; |
| |
| return 0; |
| } |
| |
| /* No support of mmap in S/PDIF mode */ |
| static const struct snd_pcm_hardware stm32_sai_pcm_hw_spdif = { |
| .info = SNDRV_PCM_INFO_INTERLEAVED, |
| .buffer_bytes_max = 8 * PAGE_SIZE, |
| .period_bytes_min = 1024, |
| .period_bytes_max = PAGE_SIZE, |
| .periods_min = 2, |
| .periods_max = 8, |
| }; |
| |
| static const struct snd_pcm_hardware stm32_sai_pcm_hw = { |
| .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP, |
| .buffer_bytes_max = 8 * PAGE_SIZE, |
| .period_bytes_min = 1024, /* 5ms at 48kHz */ |
| .period_bytes_max = PAGE_SIZE, |
| .periods_min = 2, |
| .periods_max = 8, |
| }; |
| |
| static struct snd_soc_dai_driver stm32_sai_playback_dai = { |
| .probe = stm32_sai_dai_probe, |
| .pcm_new = stm32_sai_pcm_new, |
| .id = 1, /* avoid call to fmt_single_name() */ |
| .playback = { |
| .channels_min = 1, |
| .channels_max = 16, |
| .rate_min = 8000, |
| .rate_max = 192000, |
| .rates = SNDRV_PCM_RATE_CONTINUOUS, |
| /* DMA does not support 24 bits transfers */ |
| .formats = |
| SNDRV_PCM_FMTBIT_S8 | |
| SNDRV_PCM_FMTBIT_S16_LE | |
| SNDRV_PCM_FMTBIT_S32_LE, |
| }, |
| .ops = &stm32_sai_pcm_dai_ops, |
| }; |
| |
| static struct snd_soc_dai_driver stm32_sai_capture_dai = { |
| .probe = stm32_sai_dai_probe, |
| .id = 1, /* avoid call to fmt_single_name() */ |
| .capture = { |
| .channels_min = 1, |
| .channels_max = 16, |
| .rate_min = 8000, |
| .rate_max = 192000, |
| .rates = SNDRV_PCM_RATE_CONTINUOUS, |
| /* DMA does not support 24 bits transfers */ |
| .formats = |
| SNDRV_PCM_FMTBIT_S8 | |
| SNDRV_PCM_FMTBIT_S16_LE | |
| SNDRV_PCM_FMTBIT_S32_LE, |
| }, |
| .ops = &stm32_sai_pcm_dai_ops, |
| }; |
| |
| static const struct snd_dmaengine_pcm_config stm32_sai_pcm_config = { |
| .pcm_hardware = &stm32_sai_pcm_hw, |
| .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, |
| }; |
| |
| static const struct snd_dmaengine_pcm_config stm32_sai_pcm_config_spdif = { |
| .pcm_hardware = &stm32_sai_pcm_hw_spdif, |
| .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, |
| .process = stm32_sai_pcm_process_spdif, |
| }; |
| |
| static const struct snd_soc_component_driver stm32_component = { |
| .name = "stm32-sai", |
| .legacy_dai_naming = 1, |
| }; |
| |
| static const struct of_device_id stm32_sai_sub_ids[] = { |
| { .compatible = "st,stm32-sai-sub-a", |
| .data = (void *)STM_SAI_A_ID}, |
| { .compatible = "st,stm32-sai-sub-b", |
| .data = (void *)STM_SAI_B_ID}, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(of, stm32_sai_sub_ids); |
| |
| static int stm32_sai_sub_parse_of(struct platform_device *pdev, |
| struct stm32_sai_sub_data *sai) |
| { |
| struct device_node *np = pdev->dev.of_node; |
| struct resource *res; |
| void __iomem *base; |
| struct of_phandle_args args; |
| int ret; |
| |
| if (!np) |
| return -ENODEV; |
| |
| base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); |
| if (IS_ERR(base)) |
| return PTR_ERR(base); |
| |
| sai->phys_addr = res->start; |
| |
| sai->regmap_config = &stm32_sai_sub_regmap_config_f4; |
| /* Note: PDM registers not available for sub-block B */ |
| if (STM_SAI_HAS_PDM(sai) && STM_SAI_IS_SUB_A(sai)) |
| sai->regmap_config = &stm32_sai_sub_regmap_config_h7; |
| |
| /* |
| * Do not manage peripheral clock through regmap framework as this |
| * can lead to circular locking issue with sai master clock provider. |
| * Manage peripheral clock directly in driver instead. |
| */ |
| sai->regmap = devm_regmap_init_mmio(&pdev->dev, base, |
| sai->regmap_config); |
| if (IS_ERR(sai->regmap)) |
| return dev_err_probe(&pdev->dev, PTR_ERR(sai->regmap), |
| "Regmap init error\n"); |
| |
| /* Get direction property */ |
| if (of_property_match_string(np, "dma-names", "tx") >= 0) { |
| sai->dir = SNDRV_PCM_STREAM_PLAYBACK; |
| } else if (of_property_match_string(np, "dma-names", "rx") >= 0) { |
| sai->dir = SNDRV_PCM_STREAM_CAPTURE; |
| } else { |
| dev_err(&pdev->dev, "Unsupported direction\n"); |
| return -EINVAL; |
| } |
| |
| /* Get spdif iec60958 property */ |
| sai->spdif = false; |
| if (of_property_present(np, "st,iec60958")) { |
| if (!STM_SAI_HAS_SPDIF(sai) || |
| sai->dir == SNDRV_PCM_STREAM_CAPTURE) { |
| dev_err(&pdev->dev, "S/PDIF IEC60958 not supported\n"); |
| return -EINVAL; |
| } |
| stm32_sai_init_iec958_status(sai); |
| sai->spdif = true; |
| sai->master = true; |
| } |
| |
| /* Get synchronization property */ |
| args.np = NULL; |
| ret = of_parse_phandle_with_fixed_args(np, "st,sync", 1, 0, &args); |
| if (ret < 0 && ret != -ENOENT) { |
| dev_err(&pdev->dev, "Failed to get st,sync property\n"); |
| return ret; |
| } |
| |
| sai->sync = SAI_SYNC_NONE; |
| if (args.np) { |
| if (args.np == np) { |
| dev_err(&pdev->dev, "%pOFn sync own reference\n", np); |
| of_node_put(args.np); |
| return -EINVAL; |
| } |
| |
| sai->np_sync_provider = of_get_parent(args.np); |
| if (!sai->np_sync_provider) { |
| dev_err(&pdev->dev, "%pOFn parent node not found\n", |
| np); |
| of_node_put(args.np); |
| return -ENODEV; |
| } |
| |
| sai->sync = SAI_SYNC_INTERNAL; |
| if (sai->np_sync_provider != sai->pdata->pdev->dev.of_node) { |
| if (!STM_SAI_HAS_EXT_SYNC(sai)) { |
| dev_err(&pdev->dev, |
| "External synchro not supported\n"); |
| of_node_put(args.np); |
| return -EINVAL; |
| } |
| sai->sync = SAI_SYNC_EXTERNAL; |
| |
| sai->synci = args.args[0]; |
| if (sai->synci < 1 || |
| (sai->synci > (SAI_GCR_SYNCIN_MAX + 1))) { |
| dev_err(&pdev->dev, "Wrong SAI index\n"); |
| of_node_put(args.np); |
| return -EINVAL; |
| } |
| |
| if (of_property_match_string(args.np, "compatible", |
| "st,stm32-sai-sub-a") >= 0) |
| sai->synco = STM_SAI_SYNC_OUT_A; |
| |
| if (of_property_match_string(args.np, "compatible", |
| "st,stm32-sai-sub-b") >= 0) |
| sai->synco = STM_SAI_SYNC_OUT_B; |
| |
| if (!sai->synco) { |
| dev_err(&pdev->dev, "Unknown SAI sub-block\n"); |
| of_node_put(args.np); |
| return -EINVAL; |
| } |
| } |
| |
| dev_dbg(&pdev->dev, "%s synchronized with %s\n", |
| pdev->name, args.np->full_name); |
| } |
| |
| of_node_put(args.np); |
| sai->sai_ck = devm_clk_get(&pdev->dev, "sai_ck"); |
| if (IS_ERR(sai->sai_ck)) |
| return dev_err_probe(&pdev->dev, PTR_ERR(sai->sai_ck), |
| "Missing kernel clock sai_ck\n"); |
| |
| ret = clk_prepare(sai->pdata->pclk); |
| if (ret < 0) |
| return ret; |
| |
| if (STM_SAI_IS_F4(sai->pdata)) |
| return 0; |
| |
| /* Register mclk provider if requested */ |
| if (of_property_present(np, "#clock-cells")) { |
| ret = stm32_sai_add_mclk_provider(sai); |
| if (ret < 0) |
| return ret; |
| } else { |
| sai->sai_mclk = devm_clk_get(&pdev->dev, "MCLK"); |
| if (IS_ERR(sai->sai_mclk)) { |
| if (PTR_ERR(sai->sai_mclk) != -ENOENT) |
| return PTR_ERR(sai->sai_mclk); |
| sai->sai_mclk = NULL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int stm32_sai_sub_probe(struct platform_device *pdev) |
| { |
| struct stm32_sai_sub_data *sai; |
| const struct of_device_id *of_id; |
| const struct snd_dmaengine_pcm_config *conf = &stm32_sai_pcm_config; |
| int ret; |
| |
| sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL); |
| if (!sai) |
| return -ENOMEM; |
| |
| of_id = of_match_device(stm32_sai_sub_ids, &pdev->dev); |
| if (!of_id) |
| return -EINVAL; |
| sai->id = (uintptr_t)of_id->data; |
| |
| sai->pdev = pdev; |
| mutex_init(&sai->ctrl_lock); |
| spin_lock_init(&sai->irq_lock); |
| platform_set_drvdata(pdev, sai); |
| |
| sai->pdata = dev_get_drvdata(pdev->dev.parent); |
| if (!sai->pdata) { |
| dev_err(&pdev->dev, "Parent device data not available\n"); |
| return -EINVAL; |
| } |
| |
| ret = stm32_sai_sub_parse_of(pdev, sai); |
| if (ret) |
| return ret; |
| |
| if (STM_SAI_IS_PLAYBACK(sai)) |
| sai->cpu_dai_drv = stm32_sai_playback_dai; |
| else |
| sai->cpu_dai_drv = stm32_sai_capture_dai; |
| sai->cpu_dai_drv.name = dev_name(&pdev->dev); |
| |
| ret = devm_request_irq(&pdev->dev, sai->pdata->irq, stm32_sai_isr, |
| IRQF_SHARED, dev_name(&pdev->dev), sai); |
| if (ret) { |
| dev_err(&pdev->dev, "IRQ request returned %d\n", ret); |
| return ret; |
| } |
| |
| if (STM_SAI_PROTOCOL_IS_SPDIF(sai)) |
| conf = &stm32_sai_pcm_config_spdif; |
| |
| ret = snd_dmaengine_pcm_register(&pdev->dev, conf, 0); |
| if (ret) |
| return dev_err_probe(&pdev->dev, ret, "Could not register pcm dma\n"); |
| |
| ret = snd_soc_register_component(&pdev->dev, &stm32_component, |
| &sai->cpu_dai_drv, 1); |
| if (ret) { |
| snd_dmaengine_pcm_unregister(&pdev->dev); |
| return ret; |
| } |
| |
| pm_runtime_enable(&pdev->dev); |
| |
| return 0; |
| } |
| |
| static void stm32_sai_sub_remove(struct platform_device *pdev) |
| { |
| struct stm32_sai_sub_data *sai = dev_get_drvdata(&pdev->dev); |
| |
| clk_unprepare(sai->pdata->pclk); |
| snd_dmaengine_pcm_unregister(&pdev->dev); |
| snd_soc_unregister_component(&pdev->dev); |
| pm_runtime_disable(&pdev->dev); |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int stm32_sai_sub_suspend(struct device *dev) |
| { |
| struct stm32_sai_sub_data *sai = dev_get_drvdata(dev); |
| int ret; |
| |
| ret = clk_enable(sai->pdata->pclk); |
| if (ret < 0) |
| return ret; |
| |
| regcache_cache_only(sai->regmap, true); |
| regcache_mark_dirty(sai->regmap); |
| |
| clk_disable(sai->pdata->pclk); |
| |
| return 0; |
| } |
| |
| static int stm32_sai_sub_resume(struct device *dev) |
| { |
| struct stm32_sai_sub_data *sai = dev_get_drvdata(dev); |
| int ret; |
| |
| ret = clk_enable(sai->pdata->pclk); |
| if (ret < 0) |
| return ret; |
| |
| regcache_cache_only(sai->regmap, false); |
| ret = regcache_sync(sai->regmap); |
| |
| clk_disable(sai->pdata->pclk); |
| |
| return ret; |
| } |
| #endif /* CONFIG_PM_SLEEP */ |
| |
| static const struct dev_pm_ops stm32_sai_sub_pm_ops = { |
| SET_SYSTEM_SLEEP_PM_OPS(stm32_sai_sub_suspend, stm32_sai_sub_resume) |
| }; |
| |
| static struct platform_driver stm32_sai_sub_driver = { |
| .driver = { |
| .name = "st,stm32-sai-sub", |
| .of_match_table = stm32_sai_sub_ids, |
| .pm = &stm32_sai_sub_pm_ops, |
| }, |
| .probe = stm32_sai_sub_probe, |
| .remove_new = stm32_sai_sub_remove, |
| }; |
| |
| module_platform_driver(stm32_sai_sub_driver); |
| |
| MODULE_DESCRIPTION("STM32 Soc SAI sub-block Interface"); |
| MODULE_AUTHOR("Olivier Moysan <olivier.moysan@st.com>"); |
| MODULE_ALIAS("platform:st,stm32-sai-sub"); |
| MODULE_LICENSE("GPL v2"); |