2 * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
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.
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.
13 * lpass.h - Definitions for the QTi LPASS
19 #include <linux/clk.h>
20 #include <linux/compiler.h>
21 #include <linux/platform_device.h>
22 #include <linux/regmap.h>
24 #define LPASS_AHBIX_CLOCK_FREQUENCY 131072000
25 #define LPASS_MAX_MI2S_PORTS (8)
27 /* Both the CPU DAI and platform drivers will access this data */
30 /* AHB-I/X bus clocks inside the low-power audio subsystem (LPASS) */
31 struct clk *ahbix_clk;
33 /* MI2S system clock */
34 struct clk *mi2s_osr_clk[LPASS_MAX_MI2S_PORTS];
36 /* MI2S bit clock (derived from system clock by a divider */
37 struct clk *mi2s_bit_clk[LPASS_MAX_MI2S_PORTS];
39 /* low-power audio interface (LPAIF) registers */
42 /* regmap backed by the low-power audio interface (LPAIF) registers */
43 struct regmap *lpaif_map;
45 /* interrupts from the low-power audio interface (LPAIF) */
48 /* SOC specific variations in the LPASS IP integration */
49 struct lpass_variant *variant;
52 /* Vairant data per each SOC */
53 struct lpass_variant {
55 u32 i2sctrl_reg_stride;
65 * on SOCs like APQ8016 the channel control bits start
66 * at different offset to ipq806x
68 u32 rdmactl_audif_start;
69 /* SOC specific intialization like clocks */
70 int (*init)(struct platform_device *pdev);
71 int (*exit)(struct platform_device *pdev);
72 int (*alloc_dma_channel)(struct lpass_data *data);
73 int (*free_dma_channel)(struct lpass_data *data, int ch);
75 /* SOC specific dais */
76 struct snd_soc_dai_driver *dai_driver;
80 /* register the platform driver from the CPU DAI driver */
81 int asoc_qcom_lpass_platform_register(struct platform_device *);
82 int asoc_qcom_lpass_cpu_platform_remove(struct platform_device *pdev);
83 int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev);
84 int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai);
85 extern struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops;
87 #endif /* __LPASS_H__ */