diff options
Diffstat (limited to 'sound/soc/fsl/lpc3xxx-i2s.h')
| -rw-r--r-- | sound/soc/fsl/lpc3xxx-i2s.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/sound/soc/fsl/lpc3xxx-i2s.h b/sound/soc/fsl/lpc3xxx-i2s.h new file mode 100644 index 000000000000..b6657853017a --- /dev/null +++ b/sound/soc/fsl/lpc3xxx-i2s.h @@ -0,0 +1,80 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Author: Kevin Wells <kevin.wells@nxp.com> + * + * Copyright (C) 2008 NXP Semiconductors + * Copyright 2023 Timesys Corporation <piotr.wojtaszczyk@timesys.com> + */ + +#ifndef __SOUND_SOC_LPC3XXX_I2S_H +#define __SOUND_SOC_LPC3XXX_I2S_H + +#include <linux/bitfield.h> +#include <linux/types.h> +#include <linux/regmap.h> + +struct lpc3xxx_i2s_info { + struct device *dev; + struct clk *clk; + struct mutex lock; /* To serialize user-space access */ + struct regmap *regs; + u32 streams_in_use; + u32 clkrate; + int freq; + struct snd_dmaengine_dai_dma_data playback_dma_config; + struct snd_dmaengine_dai_dma_data capture_dma_config; +}; + +int lpc3xxx_pcm_register(struct platform_device *pdev); + +/* I2S controller register offsets */ +#define LPC3XXX_REG_I2S_DAO 0x00 +#define LPC3XXX_REG_I2S_DAI 0x04 +#define LPC3XXX_REG_I2S_TX_FIFO 0x08 +#define LPC3XXX_REG_I2S_RX_FIFO 0x0C +#define LPC3XXX_REG_I2S_STAT 0x10 +#define LPC3XXX_REG_I2S_DMA0 0x14 +#define LPC3XXX_REG_I2S_DMA1 0x18 +#define LPC3XXX_REG_I2S_IRQ 0x1C +#define LPC3XXX_REG_I2S_TX_RATE 0x20 +#define LPC3XXX_REG_I2S_RX_RATE 0x24 + +/* i2s_daO i2s_dai register definitions */ +#define LPC3XXX_I2S_WW8 FIELD_PREP(0x3, 0) /* Word width is 8bit */ +#define LPC3XXX_I2S_WW16 FIELD_PREP(0x3, 1) /* Word width is 16bit */ +#define LPC3XXX_I2S_WW32 FIELD_PREP(0x3, 3) /* Word width is 32bit */ +#define LPC3XXX_I2S_MONO BIT(2) /* Mono */ +#define LPC3XXX_I2S_STOP BIT(3) /* Stop, diables the access to FIFO, mutes the channel */ +#define LPC3XXX_I2S_RESET BIT(4) /* Reset the channel */ +#define LPC3XXX_I2S_WS_SEL BIT(5) /* Channel Master(0) or slave(1) mode select */ +#define LPC3XXX_I2S_WS_HP(s) FIELD_PREP(0x7FC0, s) /* Word select half period - 1 */ +#define LPC3XXX_I2S_MUTE BIT(15) /* Mute the channel, Transmit channel only */ + +#define LPC3XXX_I2S_WW32_HP 0x1f /* Word select half period for 32bit word width */ +#define LPC3XXX_I2S_WW16_HP 0x0f /* Word select half period for 16bit word width */ +#define LPC3XXX_I2S_WW8_HP 0x7 /* Word select half period for 8bit word width */ + +/* i2s_stat register definitions */ +#define LPC3XXX_I2S_IRQ_STAT BIT(0) +#define LPC3XXX_I2S_DMA0_REQ BIT(1) +#define LPC3XXX_I2S_DMA1_REQ BIT(2) + +/* i2s_dma0 Configuration register definitions */ +#define LPC3XXX_I2S_DMA0_RX_EN BIT(0) /* Enable RX DMA1 */ +#define LPC3XXX_I2S_DMA0_TX_EN BIT(1) /* Enable TX DMA1 */ +#define LPC3XXX_I2S_DMA0_RX_DEPTH(s) FIELD_PREP(0xF00, s) /* Set the DMA1 RX Request level */ +#define LPC3XXX_I2S_DMA0_TX_DEPTH(s) FIELD_PREP(0xF0000, s) /* Set the DMA1 TX Request level */ + +/* i2s_dma1 Configuration register definitions */ +#define LPC3XXX_I2S_DMA1_RX_EN BIT(0) /* Enable RX DMA1 */ +#define LPC3XXX_I2S_DMA1_TX_EN BIT(1) /* Enable TX DMA1 */ +#define LPC3XXX_I2S_DMA1_RX_DEPTH(s) FIELD_PREP(0x700, s) /* Set the DMA1 RX Request level */ +#define LPC3XXX_I2S_DMA1_TX_DEPTH(s) FIELD_PREP(0x70000, s) /* Set the DMA1 TX Request level */ + +/* i2s_irq register definitions */ +#define LPC3XXX_I2S_RX_IRQ_EN BIT(0) /* Enable RX IRQ */ +#define LPC3XXX_I2S_TX_IRQ_EN BIT(1) /* Enable TX IRQ */ +#define LPC3XXX_I2S_IRQ_RX_DEPTH(s) FIELD_PREP(0xFF00, s) /* valid values ar 0 to 7 */ +#define LPC3XXX_I2S_IRQ_TX_DEPTH(s) FIELD_PREP(0xFF0000, s) /* valid values ar 0 to 7 */ + +#endif |