1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
5 * lpass.h - Definitions for the QTi LPASS
11 #include <linux/clk.h>
12 #include <linux/compiler.h>
13 #include <linux/platform_device.h>
14 #include <linux/regmap.h>
16 #define LPASS_AHBIX_CLOCK_FREQUENCY 131072000
17 #define LPASS_MAX_MI2S_PORTS (8)
18 #define LPASS_MAX_DMA_CHANNELS (8)
20 /* Both the CPU DAI and platform drivers will access this data */
23 /* AHB-I/X bus clocks inside the low-power audio subsystem (LPASS) */
24 struct clk *ahbix_clk;
26 /* MI2S system clock */
27 struct clk *mi2s_osr_clk[LPASS_MAX_MI2S_PORTS];
29 /* MI2S bit clock (derived from system clock by a divider */
30 struct clk *mi2s_bit_clk[LPASS_MAX_MI2S_PORTS];
32 /* low-power audio interface (LPAIF) registers */
35 /* regmap backed by the low-power audio interface (LPAIF) registers */
36 struct regmap *lpaif_map;
38 /* interrupts from the low-power audio interface (LPAIF) */
41 /* SOC specific variations in the LPASS IP integration */
42 struct lpass_variant *variant;
44 /* bit map to keep track of static channel allocations */
45 unsigned long dma_ch_bit_map;
47 /* used it for handling interrupt per dma channel */
48 struct snd_pcm_substream *substream[LPASS_MAX_DMA_CHANNELS];
51 struct clk *pcnoc_mport_clk;
52 struct clk *pcnoc_sway_clk;
56 /* Vairant data per each SOC */
57 struct lpass_variant {
59 u32 i2sctrl_reg_stride;
72 * on SOCs like APQ8016 the channel control bits start
73 * at different offset to ipq806x
75 u32 dmactl_audif_start;
76 u32 wrdma_channel_start;
77 /* SOC specific initialization like clocks */
78 int (*init)(struct platform_device *pdev);
79 int (*exit)(struct platform_device *pdev);
80 int (*alloc_dma_channel)(struct lpass_data *data, int direction);
81 int (*free_dma_channel)(struct lpass_data *data, int ch);
83 /* SOC specific dais */
84 struct snd_soc_dai_driver *dai_driver;
86 const char * const *dai_osr_clk_names;
87 const char * const *dai_bit_clk_names;
90 /* register the platform driver from the CPU DAI driver */
91 int asoc_qcom_lpass_platform_register(struct platform_device *);
92 int asoc_qcom_lpass_cpu_platform_remove(struct platform_device *pdev);
93 int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev);
94 int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai);
95 extern const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops;
97 #endif /* __LPASS_H__ */