diff options
Diffstat (limited to 'sound/soc/starfive/pwmdac.h')
| -rw-r--r-- | sound/soc/starfive/pwmdac.h | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/sound/soc/starfive/pwmdac.h b/sound/soc/starfive/pwmdac.h new file mode 100644 index 000000000000..b9f651fc59f1 --- /dev/null +++ b/sound/soc/starfive/pwmdac.h @@ -0,0 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021 StarFive Technology Co., Ltd. + */ +#ifndef __SND_SOC_STARFIVE_PWMDAC_H +#define __SND_SOC_STARFIVE_PWMDAC_H + +#include <linux/clk.h> +#include <linux/reset.h> +#include <linux/device.h> +#include <linux/types.h> +#include <sound/dmaengine_pcm.h> +#include <sound/pcm.h> + +#define PWMDAC_WDATA 0 // PWMDAC_BASE_ADDR +#define PWMDAC_CTRL 0x04 // PWMDAC_BASE_ADDR + 0x04 +#define PWMDAC_SATAE 0x08 // PWMDAC_BASE_ADDR + 0x08 +#define PWMDAC_RESERVED 0x0C // PWMDAC_BASE_ADDR + 0x0C + +#define SFC_PWMDAC_SHIFT BIT(1) +#define SFC_PWMDAC_DUTY_CYCLE BIT(2) +#define SFC_PWMDAC_CNT_N BIT(4) + +#define SFC_PWMDAC_LEFT_RIGHT_DATA_CHANGE BIT(13) +#define SFC_PWMDAC_DATA_MODE BIT(14) + +#define FIFO_UN_FULL 0 +#define FIFO_FULL 1 + +enum pwmdac_lr_change{ + NO_CHANGE = 0, + CHANGE, +}; + +enum pwmdac_d_mode{ + UNSINGED_DATA = 0, + INVERTER_DATA_MSB, +}; + +enum pwmdac_shift_bit{ + PWMDAC_SHIFT_8 = 8, /* pwmdac shift 8 bit */ + PWMDAC_SHIFT_10 = 10, /* pwmdac shift 10 bit */ +}; + +enum pwmdac_duty_cycle{ + PWMDAC_CYCLE_LEFT = 0, /* pwmdac duty cycle left */ + PWMDAC_CYCLE_RIGHT = 1, /* pwmdac duty cycle right */ + PWMDAC_CYCLE_CENTER = 2, /* pwmdac duty cycle center */ +}; + +/*sample count [12:4] <511*/ +enum pwmdac_sample_count{ + PWMDAC_SAMPLE_CNT_1 = 1, + PWMDAC_SAMPLE_CNT_2, + PWMDAC_SAMPLE_CNT_3, + PWMDAC_SAMPLE_CNT_4, + PWMDAC_SAMPLE_CNT_5, + PWMDAC_SAMPLE_CNT_6, + PWMDAC_SAMPLE_CNT_7, + PWMDAC_SAMPLE_CNT_8 = 1, //(32.468/8) == (12.288/3) == 4.096 + PWMDAC_SAMPLE_CNT_9, + PWMDAC_SAMPLE_CNT_10, + PWMDAC_SAMPLE_CNT_11, + PWMDAC_SAMPLE_CNT_12, + PWMDAC_SAMPLE_CNT_13, + PWMDAC_SAMPLE_CNT_14, + PWMDAC_SAMPLE_CNT_15, + PWMDAC_SAMPLE_CNT_16, + PWMDAC_SAMPLE_CNT_17, + PWMDAC_SAMPLE_CNT_18, + PWMDAC_SAMPLE_CNT_19, + PWMDAC_SAMPLE_CNT_20 = 20, + PWMDAC_SAMPLE_CNT_30 = 30, + PWMDAC_SAMPLE_CNT_511 = 511, +}; + + +enum data_shift{ + PWMDAC_DATA_LEFT_SHIFT_BIT_0 = 0, + PWMDAC_DATA_LEFT_SHIFT_BIT_1, + PWMDAC_DATA_LEFT_SHIFT_BIT_2, + PWMDAC_DATA_LEFT_SHIFT_BIT_3, + PWMDAC_DATA_LEFT_SHIFT_BIT_4, + PWMDAC_DATA_LEFT_SHIFT_BIT_5, + PWMDAC_DATA_LEFT_SHIFT_BIT_6, + PWMDAC_DATA_LEFT_SHIFT_BIT_7, + PWMDAC_DATA_LEFT_SHIFT_BIT_ALL, +}; + +enum pwmdac_config_list{ + shift_8Bit_unsigned = 0, + shift_8Bit_unsigned_dataShift, + shift_10Bit_unsigned, + shift_10Bit_unsigned_dataShift, + + shift_8Bit_inverter, + shift_8Bit_inverter_dataShift, + shift_10Bit_inverter, + shift_10Bit_inverter_dataShift, +}; + +enum pwmdac_clocks { + PWMDAC_CLK_AUDIO_ROOT, + PWMDAC_CLK_AUDIO_SRC, + PWMDAC_CLK_AUDIO_12288, + PWMDAC_CLK_DMA1P_AHB, + PWMDAC_CLK_PWMDAC_APB, + PWMDAC_CLK_DAC_MCLK, + PWMDAC_CLK_NUM, +}; + +enum pwmdac_resets { + PWMDAC_RST_APB_BUS, + PWMDAC_RST_DMA1P_AHB, + PWMDAC_RST_APB_PWMDAC, + PWMDAC_RST_NUM, +}; + +struct sf_pwmdac_dev { + void __iomem *pwmdac_base; + resource_size_t mapbase; + u8 mode; + u8 shift_bit; + u8 duty_cycle; + u8 datan; + u8 data_mode; + u8 lr_change; + u8 shift; + u8 fifo_th; + bool use_pio; + spinlock_t lock; + int active; + + struct clk_bulk_data clk[PWMDAC_CLK_NUM]; + struct reset_control_bulk_data rst[PWMDAC_RST_NUM]; + + struct device *dev; + struct snd_dmaengine_dai_dma_data play_dma_data; + struct snd_pcm_substream __rcu *tx_substream; + unsigned int (*tx_fn)(struct sf_pwmdac_dev *dev, + struct snd_pcm_runtime *runtime, unsigned int tx_ptr, + bool *period_elapsed); + unsigned int tx_ptr; + struct task_struct *tx_thread; + bool tx_thread_exit; +}; + + + +#if IS_ENABLED(CONFIG_SND_STARFIVE_PWMDAC_PCM) +void sf_pwmdac_pcm_push_tx(struct sf_pwmdac_dev *dev); +int sf_pwmdac_pcm_register(struct platform_device *pdev); +#else +static void sf_pwmdac_pcm_push_tx(struct sf_pwmdac_dev *dev) { } +static int sf_pwmdac_pcm_register(struct platform_device *pdev) +{ + return -EINVAL; +} +#endif + +#endif |