fsl_sai.h

/*
 * Copyright 2012-2013 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __FSL_SAI_H
#define __FSL_SAI_H

#include <sound/dmaengine_pcm.h>

#define FSL_SAI_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
			 SNDRV_PCM_FMTBIT_S20_3LE |\
			 SNDRV_PCM_FMTBIT_S24_LE)

/* SAI Register Map Register */
#define FSL_SAI_TCSR	0x00 /* SAI Transmit Control */
#define FSL_SAI_TCR1	0x04 /* SAI Transmit Configuration 1 */
#define FSL_SAI_TCR2	0x08 /* SAI Transmit Configuration 2 */
#define FSL_SAI_TCR3	0x0c /* SAI Transmit Configuration 3 */
#define FSL_SAI_TCR4	0x10 /* SAI Transmit Configuration 4 */
#define FSL_SAI_TCR5	0x14 /* SAI Transmit Configuration 5 */
#define FSL_SAI_TDR	0x20 /* SAI Transmit Data */
#define FSL_SAI_TFR	0x40 /* SAI Transmit FIFO */
#define FSL_SAI_TMR	0x60 /* SAI Transmit Mask */
#define FSL_SAI_RCSR	0x80 /* SAI Receive Control */
#define FSL_SAI_RCR1	0x84 /* SAI Receive Configuration 1 */
#define FSL_SAI_RCR2	0x88 /* SAI Receive Configuration 2 */
#define FSL_SAI_RCR3	0x8c /* SAI Receive Configuration 3 */
#define FSL_SAI_RCR4	0x90 /* SAI Receive Configuration 4 */
#define FSL_SAI_RCR5	0x94 /* SAI Receive Configuration 5 */
#define FSL_SAI_RDR	0xa0 /* SAI Receive Data */
#define FSL_SAI_RFR	0xc0 /* SAI Receive FIFO */
#define FSL_SAI_RMR	0xe0 /* SAI Receive Mask */

#define FSL_SAI_xCSR(tx)	(tx ? FSL_SAI_TCSR : FSL_SAI_RCSR)
#define FSL_SAI_xCR1(tx)	(tx ? FSL_SAI_TCR1 : FSL_SAI_RCR1)
#define FSL_SAI_xCR2(tx)	(tx ? FSL_SAI_TCR2 : FSL_SAI_RCR2)
#define FSL_SAI_xCR3(tx)	(tx ? FSL_SAI_TCR3 : FSL_SAI_RCR3)
#define FSL_SAI_xCR4(tx)	(tx ? FSL_SAI_TCR4 : FSL_SAI_RCR4)
#define FSL_SAI_xCR5(tx)	(tx ? FSL_SAI_TCR5 : FSL_SAI_RCR5)
#define FSL_SAI_xDR(tx)		(tx ? FSL_SAI_TDR : FSL_SAI_RDR)
#define FSL_SAI_xFR(tx)		(tx ? FSL_SAI_TFR : FSL_SAI_RFR)
#define FSL_SAI_xMR(tx)		(tx ? FSL_SAI_TMR : FSL_SAI_RMR)

/* SAI Transmit/Recieve Control Register */
#define FSL_SAI_CSR_TERE	BIT(31)
#define FSL_SAI_CSR_FR		BIT(25)
#define FSL_SAI_CSR_SR		BIT(24)
#define FSL_SAI_CSR_xF_SHIFT	16
#define FSL_SAI_CSR_xF_W_SHIFT	18
#define FSL_SAI_CSR_xF_MASK	(0x1f << FSL_SAI_CSR_xF_SHIFT)
#define FSL_SAI_CSR_xF_W_MASK	(0x7 << FSL_SAI_CSR_xF_W_SHIFT)
#define FSL_SAI_CSR_WSF		BIT(20)
#define FSL_SAI_CSR_SEF		BIT(19)
#define FSL_SAI_CSR_FEF		BIT(18)
#define FSL_SAI_CSR_FWF		BIT(17)
#define FSL_SAI_CSR_FRF		BIT(16)
#define FSL_SAI_CSR_xIE_SHIFT	8
#define FSL_SAI_CSR_xIE_MASK	(0x1f << FSL_SAI_CSR_xIE_SHIFT)
#define FSL_SAI_CSR_WSIE	BIT(12)
#define FSL_SAI_CSR_SEIE	BIT(11)
#define FSL_SAI_CSR_FEIE	BIT(10)
#define FSL_SAI_CSR_FWIE	BIT(9)
#define FSL_SAI_CSR_FRIE	BIT(8)
#define FSL_SAI_CSR_FRDE	BIT(0)

/* SAI Transmit and Recieve Configuration 1 Register */
#define FSL_SAI_CR1_RFW_MASK	0x1f

/* SAI Transmit and Recieve Configuration 2 Register */
#define FSL_SAI_CR2_SYNC	BIT(30)
#define FSL_SAI_CR2_MSEL_MASK	(0xff << 26)
#define FSL_SAI_CR2_MSEL_BUS	0
#define FSL_SAI_CR2_MSEL_MCLK1	BIT(26)
#define FSL_SAI_CR2_MSEL_MCLK2	BIT(27)
#define FSL_SAI_CR2_MSEL_MCLK3	(BIT(26) | BIT(27))
#define FSL_SAI_CR2_BCP		BIT(25)
#define FSL_SAI_CR2_BCD_MSTR	BIT(24)

/* SAI Transmit and Recieve Configuration 3 Register */
#define FSL_SAI_CR3_TRCE	BIT(16)
#define FSL_SAI_CR3_WDFL(x)	(x)
#define FSL_SAI_CR3_WDFL_MASK	0x1f

/* SAI Transmit and Recieve Configuration 4 Register */
#define FSL_SAI_CR4_FRSZ(x)	(((x) - 1) << 16)
#define FSL_SAI_CR4_FRSZ_MASK	(0x1f << 16)
#define FSL_SAI_CR4_SYWD(x)	(((x) - 1) << 8)
#define FSL_SAI_CR4_SYWD_MASK	(0x1f << 8)
#define FSL_SAI_CR4_MF		BIT(4)
#define FSL_SAI_CR4_FSE		BIT(3)
#define FSL_SAI_CR4_FSP		BIT(1)
#define FSL_SAI_CR4_FSD_MSTR	BIT(0)

/* SAI Transmit and Recieve Configuration 5 Register */
#define FSL_SAI_CR5_WNW(x)	(((x) - 1) << 24)
#define FSL_SAI_CR5_WNW_MASK	(0x1f << 24)
#define FSL_SAI_CR5_W0W(x)	(((x) - 1) << 16)
#define FSL_SAI_CR5_W0W_MASK	(0x1f << 16)
#define FSL_SAI_CR5_FBT(x)	((x) << 8)
#define FSL_SAI_CR5_FBT_MASK	(0x1f << 8)

/* SAI type */
#define FSL_SAI_DMA		BIT(0)
#define FSL_SAI_USE_AC97	BIT(1)
#define FSL_SAI_NET		BIT(2)
#define FSL_SAI_TRA_SYN		BIT(3)
#define FSL_SAI_REC_SYN		BIT(4)
#define FSL_SAI_USE_I2S_SLAVE	BIT(5)

#define FSL_FMT_TRANSMITTER	0
#define FSL_FMT_RECEIVER	1

/* SAI clock sources */
#define FSL_SAI_CLK_BUS		0
#define FSL_SAI_CLK_MAST1	1
#define FSL_SAI_CLK_MAST2	2
#define FSL_SAI_CLK_MAST3	3

#define FSL_SAI_MCLK_MAX	3

/* SAI data transfer numbers per DMA request */
#define FSL_SAI_MAXBURST_TX 6
#define FSL_SAI_MAXBURST_RX 6

struct fsl_sai {
	struct platform_device *pdev;
	struct regmap *regmap;
	struct clk *bus_clk;
	struct clk *mclk_clk[FSL_SAI_MCLK_MAX];

	bool is_lsb_first;
	bool is_dsp_mode;
	bool sai_on_imx;
	bool synchronous[2];

	struct snd_dmaengine_dai_dma_data dma_params_rx;
	struct snd_dmaengine_dai_dma_data dma_params_tx;
};

#define TX 1
#define RX 0

#endif /* __FSL_SAI_H */