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/*
* Copyright (ST) 2012 Rajeev Kumar (rajeevkumar.linux@gmail.com)
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#ifndef __DESIGNWARE_LOCAL_H
#define __DESIGNWARE_LOCAL_H
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/types.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm.h>
#include <sound/designware_i2s.h>
/* common register for all channel */
#define IER 0x000
#define IRER 0x004
#define ITER 0x008
#define CER 0x00C
#define CCR 0x010
#define RXFFR 0x014
#define TXFFR 0x018
/* Interrupt status register fields */
#define ISR_TXFO BIT(5)
#define ISR_TXFE BIT(4)
#define ISR_RXFO BIT(1)
#define ISR_RXDA BIT(0)
/* I2STxRxRegisters for all channels */
#define LRBR_LTHR(x) (0x40 * x + 0x020)
#define RRBR_RTHR(x) (0x40 * x + 0x024)
#define RER(x) (0x40 * x + 0x028)
#define TER(x) (0x40 * x + 0x02C)
#define RCR(x) (0x40 * x + 0x030)
#define TCR(x) (0x40 * x + 0x034)
#define ISR(x) (0x40 * x + 0x038)
#define IMR(x) (0x40 * x + 0x03C)
#define ROR(x) (0x40 * x + 0x040)
#define TOR(x) (0x40 * x + 0x044)
#define RFCR(x) (0x40 * x + 0x048)
#define TFCR(x) (0x40 * x + 0x04C)
#define RFF(x) (0x40 * x + 0x050)
#define TFF(x) (0x40 * x + 0x054)
/* I2SCOMPRegisters */
#define I2S_COMP_PARAM_2 0x01F0
#define I2S_COMP_PARAM_1 0x01F4
#define I2S_COMP_VERSION 0x01F8
#define I2S_COMP_TYPE 0x01FC
/*
* Component parameter register fields - define the I2S block's
* configuration.
*/
#define COMP1_TX_WORDSIZE_3(r) (((r) & GENMASK(27, 25)) >> 25)
#define COMP1_TX_WORDSIZE_2(r) (((r) & GENMASK(24, 22)) >> 22)
#define COMP1_TX_WORDSIZE_1(r) (((r) & GENMASK(21, 19)) >> 19)
#define COMP1_TX_WORDSIZE_0(r) (((r) & GENMASK(18, 16)) >> 16)
#define COMP1_TX_CHANNELS(r) (((r) & GENMASK(10, 9)) >> 9)
#define COMP1_RX_CHANNELS(r) (((r) & GENMASK(8, 7)) >> 7)
#define COMP1_RX_ENABLED(r) (((r) & BIT(6)) >> 6)
#define COMP1_TX_ENABLED(r) (((r) & BIT(5)) >> 5)
#define COMP1_MODE_EN(r) (((r) & BIT(4)) >> 4)
#define COMP1_FIFO_DEPTH_GLOBAL(r) (((r) & GENMASK(3, 2)) >> 2)
#define COMP1_APB_DATA_WIDTH(r) (((r) & GENMASK(1, 0)) >> 0)
#define COMP2_RX_WORDSIZE_3(r) (((r) & GENMASK(12, 10)) >> 10)
#define COMP2_RX_WORDSIZE_2(r) (((r) & GENMASK(9, 7)) >> 7)
#define COMP2_RX_WORDSIZE_1(r) (((r) & GENMASK(5, 3)) >> 3)
#define COMP2_RX_WORDSIZE_0(r) (((r) & GENMASK(2, 0)) >> 0)
/* Number of entries in WORDSIZE and DATA_WIDTH parameter registers */
#define COMP_MAX_WORDSIZE (1 << 3)
#define COMP_MAX_DATA_WIDTH (1 << 2)
#define MAX_CHANNEL_NUM 8
#define MIN_CHANNEL_NUM 2
union dw_i2s_snd_dma_data {
struct i2s_dma_data pd;
struct snd_dmaengine_dai_dma_data dt;
};
struct dw_i2s_dev {
void __iomem *i2s_base;
struct clk *clk;
int active;
unsigned int capability;
unsigned int quirks;
unsigned int i2s_reg_comp1;
unsigned int i2s_reg_comp2;
struct device *dev;
u32 ccr;
u32 xfer_resolution;
u32 fifo_th;
/* data related to DMA transfers b/w i2s and DMAC */
union dw_i2s_snd_dma_data play_dma_data;
union dw_i2s_snd_dma_data capture_dma_data;
struct i2s_clk_config_data config;
int (*i2s_clk_cfg)(struct i2s_clk_config_data *config);
/* data related to PIO transfers */
bool use_pio;
struct snd_pcm_substream __rcu *tx_substream;
struct snd_pcm_substream __rcu *rx_substream;
unsigned int (*tx_fn)(struct dw_i2s_dev *dev,
struct snd_pcm_runtime *runtime, unsigned int tx_ptr,
bool *period_elapsed);
unsigned int (*rx_fn)(struct dw_i2s_dev *dev,
struct snd_pcm_runtime *runtime, unsigned int rx_ptr,
bool *period_elapsed);
unsigned int tx_ptr;
unsigned int rx_ptr;
};
#if IS_ENABLED(CONFIG_SND_DESIGNWARE_PCM)
void dw_pcm_push_tx(struct dw_i2s_dev *dev);
void dw_pcm_pop_rx(struct dw_i2s_dev *dev);
int dw_pcm_register(struct platform_device *pdev);
#else
static inline void dw_pcm_push_tx(struct dw_i2s_dev *dev) { }
static inline void dw_pcm_pop_rx(struct dw_i2s_dev *dev) { }
static inline int dw_pcm_register(struct platform_device *pdev)
{
return -EINVAL;
}
#endif
#endif
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