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
25#define LPASS_MAX_MI2S_PORTS			(8)
26#define LPASS_MAX_DMA_CHANNELS			(8)
27
28/* Both the CPU DAI and platform drivers will access this data */
29struct 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 */
35	struct clk *mi2s_osr_clk[LPASS_MAX_MI2S_PORTS];
36
37	/* MI2S bit clock (derived from system clock by a divider */
38	struct clk *mi2s_bit_clk[LPASS_MAX_MI2S_PORTS];
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;
48
49	/* SOC specific variations in the LPASS IP integration */
50	struct lpass_variant *variant;
51
52	/* bit map to keep track of static channel allocations */
53	unsigned long rdma_ch_bit_map;
54
55	/* used it for handling interrupt per dma channel */
56	struct snd_pcm_substream *substream[LPASS_MAX_DMA_CHANNELS];
57
58	/* 8016 specific */
59	struct clk *pcnoc_mport_clk;
60	struct clk *pcnoc_sway_clk;
61};
62
63/* Vairant data per each SOC */
64struct lpass_variant {
65	u32	i2sctrl_reg_base;
66	u32	i2sctrl_reg_stride;
67	u32	i2s_ports;
68	u32	irq_reg_base;
69	u32	irq_reg_stride;
70	u32	irq_ports;
71	u32	rdma_reg_base;
72	u32	rdma_reg_stride;
73	u32	rdma_channels;
74
75	/**
76	 * on SOCs like APQ8016 the channel control bits start
77	 * at different offset to ipq806x
78	 **/
79	u32	rdmactl_audif_start;
80	/* SOC specific intialization like clocks */
81	int (*init)(struct platform_device *pdev);
82	int (*exit)(struct platform_device *pdev);
83	int (*alloc_dma_channel)(struct lpass_data *data);
84	int (*free_dma_channel)(struct lpass_data *data, int ch);
85
86	/* SOC specific dais */
87	struct snd_soc_dai_driver *dai_driver;
88	int num_dai;
89};
90
91/* register the platform driver from the CPU DAI driver */
92int asoc_qcom_lpass_platform_register(struct platform_device *);
93int asoc_qcom_lpass_cpu_platform_remove(struct platform_device *pdev);
94int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev);
95int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai);
96extern const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops;
97
98#endif /* __LPASS_H__ */
99