xref: /linux/sound/soc/intel/skylake/skl-ssp-clk.h (revision 0be3ff0c)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  *  skl-ssp-clk.h - Skylake ssp clock information and ipc structure
4  *
5  *  Copyright (C) 2017 Intel Corp
6  *  Author: Jaikrishna Nemallapudi <jaikrishnax.nemallapudi@intel.com>
7  *  Author: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
8  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9  *
10  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
11  */
12 
13 #ifndef SOUND_SOC_SKL_SSP_CLK_H
14 #define SOUND_SOC_SKL_SSP_CLK_H
15 
16 #define SKL_MAX_SSP		6
17 /* xtal/cardinal/pll, parent of ssp clocks and mclk */
18 #define SKL_MAX_CLK_SRC		3
19 #define SKL_MAX_SSP_CLK_TYPES	3 /* mclk, sclk, sclkfs */
20 
21 #define SKL_MAX_CLK_CNT		(SKL_MAX_SSP * SKL_MAX_SSP_CLK_TYPES)
22 
23 /* Max number of configurations supported for each clock */
24 #define SKL_MAX_CLK_RATES	10
25 
26 #define SKL_SCLK_OFS		SKL_MAX_SSP
27 #define SKL_SCLKFS_OFS		(SKL_SCLK_OFS + SKL_MAX_SSP)
28 
29 enum skl_clk_type {
30 	SKL_MCLK,
31 	SKL_SCLK,
32 	SKL_SCLK_FS,
33 };
34 
35 enum skl_clk_src_type {
36 	SKL_XTAL,
37 	SKL_CARDINAL,
38 	SKL_PLL,
39 };
40 
41 struct skl_clk_parent_src {
42 	u8 clk_id;
43 	const char *name;
44 	unsigned long rate;
45 	const char *parent_name;
46 };
47 
48 struct skl_tlv_hdr {
49 	u32 type;
50 	u32 size;
51 };
52 
53 struct skl_dmactrl_mclk_cfg {
54 	struct skl_tlv_hdr hdr;
55 	/* DMA Clk TLV params */
56 	u32 clk_warm_up:16;
57 	u32 mclk:1;
58 	u32 warm_up_over:1;
59 	u32 rsvd0:14;
60 	u32 clk_stop_delay:16;
61 	u32 keep_running:1;
62 	u32 clk_stop_over:1;
63 	u32 rsvd1:14;
64 };
65 
66 struct skl_dmactrl_sclkfs_cfg {
67 	struct skl_tlv_hdr hdr;
68 	/* DMA SClk&FS  TLV params */
69 	u32 sampling_frequency;
70 	u32 bit_depth;
71 	u32 channel_map;
72 	u32 channel_config;
73 	u32 interleaving_style;
74 	u32 number_of_channels : 8;
75 	u32 valid_bit_depth : 8;
76 	u32 sample_type : 8;
77 	u32 reserved : 8;
78 };
79 
80 union skl_clk_ctrl_ipc {
81 	struct skl_dmactrl_mclk_cfg mclk;
82 	struct skl_dmactrl_sclkfs_cfg sclk_fs;
83 };
84 
85 struct skl_clk_rate_cfg_table {
86 	unsigned long rate;
87 	union skl_clk_ctrl_ipc dma_ctl_ipc;
88 	void *config;
89 };
90 
91 /*
92  * rate for mclk will be in rates[0]. For sclk and sclkfs, rates[] store
93  * all possible clocks ssp can generate for that platform.
94  */
95 struct skl_ssp_clk {
96 	const char *name;
97 	const char *parent_name;
98 	struct skl_clk_rate_cfg_table rate_cfg[SKL_MAX_CLK_RATES];
99 };
100 
101 struct skl_clk_pdata {
102 	struct skl_clk_parent_src *parent_clks;
103 	int num_clks;
104 	struct skl_ssp_clk *ssp_clks;
105 	void *pvt_data;
106 };
107 
108 #endif /* SOUND_SOC_SKL_SSP_CLK_H */
109