[deliverable/linux.git] / sound / soc / qcom / lpass.h

/*
 * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * lpass.h - Definitions for the QTi LPASS
 */

#ifndef __LPASS_H__
#define __LPASS_H__

#include <linux/clk.h>
#include <linux/compiler.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>

#define LPASS_AHBIX_CLOCK_FREQUENCY		131072000
#define LPASS_MAX_MI2S_PORTS			(8)
#define LPASS_MAX_DMA_CHANNELS			(8)

/* Both the CPU DAI and platform drivers will access this data */
struct lpass_data {

	/* AHB-I/X bus clocks inside the low-power audio subsystem (LPASS) */
	struct clk *ahbix_clk;

	/* MI2S system clock */
	struct clk *mi2s_osr_clk[LPASS_MAX_MI2S_PORTS];

	/* MI2S bit clock (derived from system clock by a divider */
	struct clk *mi2s_bit_clk[LPASS_MAX_MI2S_PORTS];

	/* low-power audio interface (LPAIF) registers */
	void __iomem *lpaif;

	/* regmap backed by the low-power audio interface (LPAIF) registers */
	struct regmap *lpaif_map;

	/* interrupts from the low-power audio interface (LPAIF) */
	int lpaif_irq;

	/* SOC specific variations in the LPASS IP integration */
	struct lpass_variant *variant;

	/* bit map to keep track of static channel allocations */
	unsigned long rdma_ch_bit_map;

	/* used it for handling interrupt per dma channel */
	struct snd_pcm_substream *substream[LPASS_MAX_DMA_CHANNELS];
};

/* Vairant data per each SOC */
struct lpass_variant {
	u32	i2sctrl_reg_base;
	u32	i2sctrl_reg_stride;
	u32	i2s_ports;
	u32	irq_reg_base;
	u32	irq_reg_stride;
	u32	irq_ports;
	u32	rdma_reg_base;
	u32	rdma_reg_stride;
	u32	rdma_channels;

	/**
	 * on SOCs like APQ8016 the channel control bits start
	 * at different offset to ipq806x
	 **/
	u32	rdmactl_audif_start;
	/* SOC specific intialization like clocks */
	int (*init)(struct platform_device *pdev);
	int (*exit)(struct platform_device *pdev);
	int (*alloc_dma_channel)(struct lpass_data *data);
	int (*free_dma_channel)(struct lpass_data *data, int ch);

	/* SOC specific dais */
	struct snd_soc_dai_driver *dai_driver;
	int num_dai;
};

/* register the platform driver from the CPU DAI driver */
int asoc_qcom_lpass_platform_register(struct platform_device *);
int asoc_qcom_lpass_cpu_platform_remove(struct platform_device *pdev);
int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev);
int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai);
extern struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops;

#endif /* __LPASS_H__ */
Commit	Line	Data
cd59f138 KW	1	/*
	2	* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 and
	6	* only version 2 as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* lpass.h - Definitions for the QTi LPASS
	14	*/
	15
	16	#ifndef __LPASS_H__
	17	#define __LPASS_H__
	18
	19	#include <linux/clk.h>
	20	#include <linux/compiler.h>
	21	#include <linux/platform_device.h>
	22	#include <linux/regmap.h>
	23
	24	#define LPASS_AHBIX_CLOCK_FREQUENCY 131072000
9a127cff	25	#define LPASS_MAX_MI2S_PORTS (8)
4f629e4b	26	#define LPASS_MAX_DMA_CHANNELS (8)
cd59f138 KW	27
	28	/* Both the CPU DAI and platform drivers will access this data */
	29	struct lpass_data {
	30
	31	/* AHB-I/X bus clocks inside the low-power audio subsystem (LPASS) */
	32	struct clk *ahbix_clk;
	33
	34	/* MI2S system clock */
9a127cff	35	struct clk *mi2s_osr_clk[LPASS_MAX_MI2S_PORTS];
cd59f138 KW	36
cd59f138 KW	37	/* MI2S bit clock (derived from system clock by a divider */
9a127cff	38	struct clk *mi2s_bit_clk[LPASS_MAX_MI2S_PORTS];
cd59f138 KW	39
	40	/* low-power audio interface (LPAIF) registers */
	41	void __iomem *lpaif;
	42
	43	/* regmap backed by the low-power audio interface (LPAIF) registers */
	44	struct regmap *lpaif_map;
	45
	46	/* interrupts from the low-power audio interface (LPAIF) */
	47	int lpaif_irq;
9bae4880 SK	48
	49	/* SOC specific variations in the LPASS IP integration */
	50	struct lpass_variant *variant;
4f629e4b	51
89cdfa06 SK	52	/* bit map to keep track of static channel allocations */
	53	unsigned long rdma_ch_bit_map;
	54
4f629e4b SK	55	/* used it for handling interrupt per dma channel */
4f629e4b SK	56	struct snd_pcm_substream *substream[LPASS_MAX_DMA_CHANNELS];
9bae4880 SK	57	};
	58
	59	/* Vairant data per each SOC */
	60	struct lpass_variant {
	61	u32 i2sctrl_reg_base;
	62	u32 i2sctrl_reg_stride;
	63	u32 i2s_ports;
	64	u32 irq_reg_base;
	65	u32 irq_reg_stride;
	66	u32 irq_ports;
	67	u32 rdma_reg_base;
	68	u32 rdma_reg_stride;
	69	u32 rdma_channels;
	70
0054055c SK	71	/**
	72	* on SOCs like APQ8016 the channel control bits start
	73	* at different offset to ipq806x
	74	**/
	75	u32 rdmactl_audif_start;
9bae4880 SK	76	/* SOC specific intialization like clocks */
	77	int (init)(struct platform_device pdev);
	78	int (exit)(struct platform_device pdev);
6db1c6ba SK	79	int (alloc_dma_channel)(struct lpass_data data);
6db1c6ba SK	80	int (free_dma_channel)(struct lpass_data data, int ch);
9bae4880 SK	81
	82	/* SOC specific dais */
	83	struct snd_soc_dai_driver *dai_driver;
	84	int num_dai;
cd59f138 KW	85	};
	86
	87	/* register the platform driver from the CPU DAI driver */
	88	int asoc_qcom_lpass_platform_register(struct platform_device *);
9bae4880 SK	89	int asoc_qcom_lpass_cpu_platform_remove(struct platform_device *pdev);
	90	int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev);
	91	int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai);
	92	extern struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops;
cd59f138 KW	93
cd59f138 KW	94	#endif /* __LPASS_H__ */