1/* SPDX-License-Identifier: GPL-2.0-only */
2/* Copyright (C) 2014-2015 Broadcom Corporation */
3#ifndef __CYGNUS_SSP_H__
4#define __CYGNUS_SSP_H__
5
6#define CYGNUS_TDM_DAI_MAX_SLOTS 16
7
8#define CYGNUS_MAX_PLAYBACK_PORTS 4
9#define CYGNUS_MAX_CAPTURE_PORTS 3
10#define CYGNUS_MAX_I2S_PORTS 3
11#define CYGNUS_MAX_PORTS CYGNUS_MAX_PLAYBACK_PORTS
12#define CYGNUS_AUIDO_MAX_NUM_CLKS 3
13
14#define CYGNUS_SSP_FRAMEBITS_DIV 1
15
16#define CYGNUS_SSPMODE_I2S 0
17#define CYGNUS_SSPMODE_TDM 1
18#define CYGNUS_SSPMODE_UNKNOWN -1
19
20#define CYGNUS_SSP_CLKSRC_PLL 0
21
22/* Max string length of our dt property names */
23#define PROP_LEN_MAX 40
24
25struct ringbuf_regs {
26 unsigned rdaddr;
27 unsigned wraddr;
28 unsigned baseaddr;
29 unsigned endaddr;
30 unsigned fmark; /* freemark for play, fullmark for caputure */
31 unsigned period_bytes;
32 unsigned buf_size;
33};
34
35#define RINGBUF_REG_PLAYBACK(num) ((struct ringbuf_regs) { \
36 .rdaddr = SRC_RBUF_ ##num## _RDADDR_OFFSET, \
37 .wraddr = SRC_RBUF_ ##num## _WRADDR_OFFSET, \
38 .baseaddr = SRC_RBUF_ ##num## _BASEADDR_OFFSET, \
39 .endaddr = SRC_RBUF_ ##num## _ENDADDR_OFFSET, \
40 .fmark = SRC_RBUF_ ##num## _FREE_MARK_OFFSET, \
41 .period_bytes = 0, \
42 .buf_size = 0, \
43})
44
45#define RINGBUF_REG_CAPTURE(num) ((struct ringbuf_regs) { \
46 .rdaddr = DST_RBUF_ ##num## _RDADDR_OFFSET, \
47 .wraddr = DST_RBUF_ ##num## _WRADDR_OFFSET, \
48 .baseaddr = DST_RBUF_ ##num## _BASEADDR_OFFSET, \
49 .endaddr = DST_RBUF_ ##num## _ENDADDR_OFFSET, \
50 .fmark = DST_RBUF_ ##num## _FULL_MARK_OFFSET, \
51 .period_bytes = 0, \
52 .buf_size = 0, \
53})
54
55enum cygnus_audio_port_type {
56 PORT_TDM,
57 PORT_SPDIF,
58};
59
60struct cygnus_ssp_regs {
61 u32 i2s_stream_cfg;
62 u32 i2s_cfg;
63 u32 i2s_cap_stream_cfg;
64 u32 i2s_cap_cfg;
65 u32 i2s_mclk_cfg;
66
67 u32 bf_destch_ctrl;
68 u32 bf_destch_cfg;
69 u32 bf_sourcech_ctrl;
70 u32 bf_sourcech_cfg;
71 u32 bf_sourcech_grp;
72};
73
74struct cygnus_track_clk {
75 bool cap_en;
76 bool play_en;
77 bool cap_clk_en;
78 bool play_clk_en;
79};
80
81struct cygnus_aio_port {
82 int portnum;
83 int mode;
84 bool is_slave;
85 int streams_on; /* will be 0 if both capture and play are off */
86 int fsync_width;
87 int port_type;
88
89 u32 mclk;
90 u32 lrclk;
91 u32 bit_per_frame;
92 u32 pll_clk_num;
93
94 struct cygnus_audio *cygaud;
95 struct cygnus_ssp_regs regs;
96
97 struct ringbuf_regs play_rb_regs;
98 struct ringbuf_regs capture_rb_regs;
99
100 struct snd_pcm_substream *play_stream;
101 struct snd_pcm_substream *capture_stream;
102
103 struct cygnus_track_clk clk_trace;
104};
105
106
107struct cygnus_audio {
108 struct cygnus_aio_port portinfo[CYGNUS_MAX_PORTS];
109
110 int irq_num;
111 void __iomem *audio;
112 struct device *dev;
113 void __iomem *i2s_in;
114
115 struct clk *audio_clk[CYGNUS_AUIDO_MAX_NUM_CLKS];
116 int active_ports;
117 unsigned long vco_rate;
118};
119
120extern int cygnus_ssp_set_custom_fsync_width(struct snd_soc_dai *cpu_dai,
121 int len);
122extern int cygnus_soc_platform_register(struct device *dev,
123 struct cygnus_audio *cygaud);
124extern int cygnus_soc_platform_unregister(struct device *dev);
125extern int cygnus_ssp_set_custom_fsync_width(struct snd_soc_dai *cpu_dai,
126 int len);
127#endif
128

source code of linux/sound/soc/bcm/cygnus-ssp.h