1 /*
2  * Copyright (C) 2014-2015 Broadcom Corporation
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License as
6  * published by the Free Software Foundation version 2.
7  *
8  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
9  * kind, whether express or implied; without even the implied warranty
10  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  */
13 #ifndef __CYGNUS_SSP_H__
14 #define __CYGNUS_SSP_H__
15 
16 #define CYGNUS_TDM_DAI_MAX_SLOTS 16
17 
18 #define CYGNUS_MAX_PLAYBACK_PORTS 4
19 #define CYGNUS_MAX_CAPTURE_PORTS 3
20 #define CYGNUS_MAX_I2S_PORTS 3
21 #define CYGNUS_MAX_PORTS  CYGNUS_MAX_PLAYBACK_PORTS
22 #define CYGNUS_AUIDO_MAX_NUM_CLKS 3
23 
24 #define CYGNUS_SSP_FRAMEBITS_DIV 1
25 
26 #define CYGNUS_SSPMODE_I2S 0
27 #define CYGNUS_SSPMODE_TDM 1
28 #define CYGNUS_SSPMODE_UNKNOWN -1
29 
30 #define CYGNUS_SSP_CLKSRC_PLL      0
31 
32 /* Max string length of our dt property names */
33 #define PROP_LEN_MAX 40
34 
35 struct ringbuf_regs {
36 	unsigned rdaddr;
37 	unsigned wraddr;
38 	unsigned baseaddr;
39 	unsigned endaddr;
40 	unsigned fmark;   /* freemark for play, fullmark for caputure */
41 	unsigned period_bytes;
42 	unsigned buf_size;
43 };
44 
45 #define RINGBUF_REG_PLAYBACK(num) ((struct ringbuf_regs) { \
46 	.rdaddr = SRC_RBUF_ ##num## _RDADDR_OFFSET, \
47 	.wraddr = SRC_RBUF_ ##num## _WRADDR_OFFSET, \
48 	.baseaddr = SRC_RBUF_ ##num## _BASEADDR_OFFSET, \
49 	.endaddr = SRC_RBUF_ ##num## _ENDADDR_OFFSET, \
50 	.fmark = SRC_RBUF_ ##num## _FREE_MARK_OFFSET, \
51 	.period_bytes = 0, \
52 	.buf_size = 0, \
53 })
54 
55 #define RINGBUF_REG_CAPTURE(num) ((struct ringbuf_regs)  { \
56 	.rdaddr = DST_RBUF_ ##num## _RDADDR_OFFSET, \
57 	.wraddr = DST_RBUF_ ##num## _WRADDR_OFFSET, \
58 	.baseaddr = DST_RBUF_ ##num## _BASEADDR_OFFSET, \
59 	.endaddr = DST_RBUF_ ##num## _ENDADDR_OFFSET, \
60 	.fmark = DST_RBUF_ ##num## _FULL_MARK_OFFSET, \
61 	.period_bytes = 0, \
62 	.buf_size = 0, \
63 })
64 
65 enum cygnus_audio_port_type {
66 	PORT_TDM,
67 	PORT_SPDIF,
68 };
69 
70 struct cygnus_ssp_regs {
71 	u32 i2s_stream_cfg;
72 	u32 i2s_cfg;
73 	u32 i2s_cap_stream_cfg;
74 	u32 i2s_cap_cfg;
75 	u32 i2s_mclk_cfg;
76 
77 	u32 bf_destch_ctrl;
78 	u32 bf_destch_cfg;
79 	u32 bf_sourcech_ctrl;
80 	u32 bf_sourcech_cfg;
81 	u32 bf_sourcech_grp;
82 };
83 
84 struct cygnus_track_clk {
85 	bool cap_en;
86 	bool play_en;
87 	bool cap_clk_en;
88 	bool play_clk_en;
89 };
90 
91 struct cygnus_aio_port {
92 	int portnum;
93 	int mode;
94 	bool is_slave;
95 	int streams_on;   /* will be 0 if both capture and play are off */
96 	int fsync_width;
97 	int port_type;
98 
99 	u32 mclk;
100 	u32 lrclk;
101 	u32 bit_per_frame;
102 	u32 pll_clk_num;
103 
104 	struct cygnus_audio *cygaud;
105 	struct cygnus_ssp_regs regs;
106 
107 	struct ringbuf_regs play_rb_regs;
108 	struct ringbuf_regs capture_rb_regs;
109 
110 	struct snd_pcm_substream *play_stream;
111 	struct snd_pcm_substream *capture_stream;
112 
113 	struct cygnus_track_clk clk_trace;
114 };
115 
116 
117 struct cygnus_audio {
118 	struct cygnus_aio_port  portinfo[CYGNUS_MAX_PORTS];
119 
120 	int irq_num;
121 	void __iomem *audio;
122 	struct device *dev;
123 	void __iomem *i2s_in;
124 
125 	struct clk *audio_clk[CYGNUS_AUIDO_MAX_NUM_CLKS];
126 	int active_ports;
127 	unsigned long vco_rate;
128 };
129 
130 extern int cygnus_ssp_get_mode(struct snd_soc_dai *cpu_dai);
131 extern int cygnus_ssp_add_pll_tweak_controls(struct snd_soc_pcm_runtime *rtd);
132 extern int cygnus_ssp_set_custom_fsync_width(struct snd_soc_dai *cpu_dai,
133 						int len);
134 extern int cygnus_soc_platform_register(struct device *dev,
135 					struct cygnus_audio *cygaud);
136 extern int cygnus_soc_platform_unregister(struct device *dev);
137 extern int cygnus_ssp_set_custom_fsync_width(struct snd_soc_dai *cpu_dai,
138 	int len);
139 #endif
140