summaryrefslogtreecommitdiff
path: root/sound/soc/sh/rcar/ssiu.c
blob: 06d72828e5bcdc210ceb1234880abd4d7a50186b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
/*
 * Renesas R-Car SSIU support
 *
 * Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include "rsnd.h"

#define SSIU_NAME "ssiu"

struct rsnd_ssiu {
	struct rsnd_mod mod;
};

#define rsnd_ssiu_nr(priv) ((priv)->ssiu_nr)
#define for_each_rsnd_ssiu(pos, priv, i)				\
	for (i = 0;							\
	     (i < rsnd_ssiu_nr(priv)) &&				\
		     ((pos) = ((struct rsnd_ssiu *)(priv)->ssiu + i));	\
	     i++)

static int rsnd_ssiu_init(struct rsnd_mod *mod,
			  struct rsnd_dai_stream *io,
			  struct rsnd_priv *priv)
{
	struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
	u32 multi_ssi_slaves = rsnd_ssi_multi_slaves(io);
	int use_busif = rsnd_ssi_use_busif(io);
	int id = rsnd_mod_id(mod);
	u32 mask1, val1;
	u32 mask2, val2;

	/*
	 * SSI_MODE0
	 */
	rsnd_mod_bset(mod, SSI_MODE0, (1 << id), !use_busif << id);

	/*
	 * SSI_MODE1
	 */
	mask1 = (1 << 4) | (1 << 20);	/* mask sync bit */
	mask2 = (1 << 4);		/* mask sync bit */
	val1  = val2  = 0;
	if (rsnd_ssi_is_pin_sharing(io)) {
		int shift = -1;

		switch (id) {
		case 1:
			shift = 0;
			break;
		case 2:
			shift = 2;
			break;
		case 4:
			shift = 16;
			break;
		default:
			return -EINVAL;
		}

		mask1 |= 0x3 << shift;
		val1 = rsnd_rdai_is_clk_master(rdai) ?
			0x2 << shift : 0x1 << shift;

	} else if (multi_ssi_slaves) {

		mask2 |= 0x00000007;
		mask1 |= 0x0000000f;

		switch (multi_ssi_slaves) {
		case 0x0206: /* SSI0/1/2/9 */
			val2 = (1 << 4) | /* SSI0129 sync */
				(rsnd_rdai_is_clk_master(rdai) ? 0x2 : 0x1);
			/* fall through */
		case 0x0006: /* SSI0/1/2 */
			val1 = rsnd_rdai_is_clk_master(rdai) ?
				0xa : 0x5;

			if (!val2)  /* SSI012 sync */
				val1 |= (1 << 4);
		}
	}

	rsnd_mod_bset(mod, SSI_MODE1, mask1, val1);
	rsnd_mod_bset(mod, SSI_MODE2, mask2, val2);

	return 0;
}

static struct rsnd_mod_ops rsnd_ssiu_ops_gen1 = {
	.name	= SSIU_NAME,
	.init	= rsnd_ssiu_init,
};

static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod,
			       struct rsnd_dai_stream *io,
			       struct rsnd_priv *priv)
{
	int ret;

	ret = rsnd_ssiu_init(mod, io, priv);
	if (ret < 0)
		return ret;

	if (rsnd_get_slot_width(io) >= 6) {
		/*
		 * TDM Extend Mode
		 * see
		 *	rsnd_ssi_config_init()
		 */
		rsnd_mod_write(mod, SSI_MODE, 0x1);
	}

	if (rsnd_ssi_use_busif(io)) {
		u32 val = rsnd_get_dalign(mod, io);

		rsnd_mod_write(mod, SSI_BUSIF_ADINR,
			       rsnd_get_adinr_bit(mod, io) |
			       rsnd_get_adinr_chan(mod, io));
		rsnd_mod_write(mod, SSI_BUSIF_MODE,  1);
		rsnd_mod_write(mod, SSI_BUSIF_DALIGN, val);
	}

	return 0;
}

static int rsnd_ssiu_start_gen2(struct rsnd_mod *mod,
				struct rsnd_dai_stream *io,
				struct rsnd_priv *priv)
{
	if (!rsnd_ssi_use_busif(io))
		return 0;

	rsnd_mod_write(mod, SSI_CTRL, 0x1);

	if (rsnd_ssi_multi_slaves(io))
		rsnd_mod_write(mod, SSI_CONTROL, 0x1);

	return 0;
}

static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod,
			       struct rsnd_dai_stream *io,
			       struct rsnd_priv *priv)
{
	if (!rsnd_ssi_use_busif(io))
		return 0;

	rsnd_mod_write(mod, SSI_CTRL, 0);

	if (rsnd_ssi_multi_slaves(io))
		rsnd_mod_write(mod, SSI_CONTROL, 0);

	return 0;
}

static struct rsnd_mod_ops rsnd_ssiu_ops_gen2 = {
	.name	= SSIU_NAME,
	.init	= rsnd_ssiu_init_gen2,
	.start	= rsnd_ssiu_start_gen2,
	.stop	= rsnd_ssiu_stop_gen2,
};

static struct rsnd_mod *rsnd_ssiu_mod_get(struct rsnd_priv *priv, int id)
{
	if (WARN_ON(id < 0 || id >= rsnd_ssiu_nr(priv)))
		id = 0;

	return rsnd_mod_get((struct rsnd_ssiu *)(priv->ssiu) + id);
}

int rsnd_ssiu_attach(struct rsnd_dai_stream *io,
		     struct rsnd_mod *ssi_mod)
{
	struct rsnd_priv *priv = rsnd_io_to_priv(io);
	struct rsnd_mod *mod = rsnd_ssiu_mod_get(priv, rsnd_mod_id(ssi_mod));

	rsnd_mod_confirm_ssi(ssi_mod);

	return rsnd_dai_connect(mod, io, mod->type);
}

int rsnd_ssiu_probe(struct rsnd_priv *priv)
{
	struct device *dev = rsnd_priv_to_dev(priv);
	struct rsnd_ssiu *ssiu;
	static struct rsnd_mod_ops *ops;
	int i, nr, ret;

	/* same number to SSI */
	nr	= priv->ssi_nr;
	ssiu	= devm_kzalloc(dev, sizeof(*ssiu) * nr, GFP_KERNEL);
	if (!ssiu)
		return -ENOMEM;

	priv->ssiu	= ssiu;
	priv->ssiu_nr	= nr;

	if (rsnd_is_gen1(priv))
		ops = &rsnd_ssiu_ops_gen1;
	else
		ops = &rsnd_ssiu_ops_gen2;

	for_each_rsnd_ssiu(ssiu, priv, i) {
		ret = rsnd_mod_init(priv, rsnd_mod_get(ssiu),
				    ops, NULL, RSND_MOD_SSIU, i);
		if (ret)
			return ret;
	}

	return 0;
}

void rsnd_ssiu_remove(struct rsnd_priv *priv)
{
	struct rsnd_ssiu *ssiu;
	int i;

	for_each_rsnd_ssiu(ssiu, priv, i) {
		rsnd_mod_quit(rsnd_mod_get(ssiu));
	}
}