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/* SPDX-License-Identifier: GPL-2.0
*
* TDM driver for the StarFive JH7110 SoC
*
* Copyright (C) 2021 StarFive Technology Co., Ltd.
*/
#ifndef __SND_SOC_STARFIVE_TDM_H
#define __SND_SOC_STARFIVE_TDM_H
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/types.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm.h>
#include <linux/dmaengine.h>
#include <linux/types.h>
#define TDM_PCMGBCR 0x00
#define PCMGBCR_MASK 0x1e
#define PCMGBCR_ENABLE BIT(0)
#define PCMGBCR_TRITXEN BIT(4)
#define CLKPOL_BIT 5
#define TRITXEN_BIT 4
#define ELM_BIT 3
#define SYNCM_BIT 2
#define MS_BIT 1
#define TDM_PCMTXCR 0x04
#define PCMTXCR_TXEN BIT(0)
#define IFL_BIT 11
#define WL_BIT 8
#define SSCALE_BIT 4
#define SL_BIT 2
#define LRJ_BIT 1
#define TDM_PCMRXCR 0x08
#define PCMRXCR_RXEN BIT(0)
#define PCMRXCR_RXSL_MASK 0xc
#define PCMRXCR_RXSL_16BIT 0x4
#define PCMRXCR_RXSL_32BIT 0x8
#define PCMRXCR_SCALE_MASK 0xf0
#define PCMRXCR_SCALE_1CH 0x10
#define TDM_PCMDIV 0x0c
/* DMA registers */
#define TDM_FIFO 0x170c0000
#define TDM_FIFO_DEPTH 32
#define ONE_CHANNEL_SUPPORT 1
#define TWO_CHANNEL_SUPPORT 2
#define FOUR_CHANNEL_SUPPORT 4
#define SIX_CHANNEL_SUPPORT 6
#define EIGHT_CHANNEL_SUPPORT 8
enum TDM_MASTER_SLAVE_MODE {
TDM_AS_MASTER = 0,
TDM_AS_SLAVE,
};
enum TDM_CLKPOL {
/* tx raising and rx falling */
TDM_TX_RASING_RX_FALLING = 0,
/* tx falling and rx raising */
TDM_TX_FALLING_RX_RASING,
};
enum TDM_FRAME_MODE {
SHORT_EARLY = 0,
SHORT_LATER,
LONG,
};
enum TDM_ELM {
/* only work while SYNCM=0 */
TDM_ELM_LATE = 0,
TDM_ELM_EARLY,
};
enum TDM_SYNCM {
/* short frame sync */
TDM_SYNCM_SHORT = 0,
/* long frame sync */
TDM_SYNCM_LONG,
};
enum TDM_IFL {
/* FIFO to send or received : half-1/2, Quarter-1/4 */
TDM_FIFO_HALF = 0,
TDM_FIFO_QUARTER,
};
enum TDM_WL {
/* send or received word length */
TDM_8BIT_WORD_LEN = 0,
TDM_16BIT_WORD_LEN,
TDM_20BIT_WORD_LEN,
TDM_24BIT_WORD_LEN,
TDM_32BIT_WORD_LEN,
};
enum TDM_SL {
/* send or received slot length */
TDM_8BIT_SLOT_LEN = 0,
TDM_16BIT_SLOT_LEN,
TDM_32BIT_SLOT_LEN,
};
enum TDM_LRJ {
/* left-justify or right-justify */
TDM_RIGHT_JUSTIFY = 0,
TDM_LEFT_JUSTIFT,
};
typedef struct tdm_chan_cfg {
enum TDM_IFL ifl;
enum TDM_WL wl;
unsigned char sscale;
enum TDM_SL sl;
enum TDM_LRJ lrj;
unsigned char enable;
} tdm_chan_cfg_t;
struct sf_tdm_dev {
void __iomem *tdm_base;
struct device *dev;
struct clk *clk_tdm_ahb;
struct clk *clk_tdm_apb;
struct clk *clk_tdm_internal;
struct clk *clk_tdm_ext;
struct clk *clk_tdm;
struct clk *clk_mclk_inner;
struct reset_control *resets;
int active;
enum TDM_CLKPOL clkpolity;
enum TDM_ELM elm;
enum TDM_SYNCM syncm;
enum TDM_MASTER_SLAVE_MODE ms_mode;
enum TDM_FRAME_MODE frame_mode;
unsigned char tritxen;
tdm_chan_cfg_t tx;
tdm_chan_cfg_t rx;
u16 syncdiv;
u32 samplerate;
u32 pcmclk;
/* data related to DMA transfers b/w tdm and DMAC */
struct snd_dmaengine_dai_dma_data play_dma_data;
struct snd_dmaengine_dai_dma_data capture_dma_data;
u32 saved_reg_value[4];
};
#endif /* __SND_SOC_STARFIVE_TDM_H */
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