summaryrefslogtreecommitdiff
path: root/sound/soc/sh/rcar/scu.c
blob: fa8fa15860b9bda89dc5d3af73c85a5c4f076f15 (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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
/*
 * Renesas R-Car SCU support
 *
 * Copyright (C) 2013 Renesas Solutions Corp.
 * 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"

struct rsnd_scu {
	struct rsnd_scu_platform_info *info; /* rcar_snd.h */
	struct rsnd_mod mod;
};

#define rsnd_scu_mode_flags(p) ((p)->info->flags)

/*
 * ADINR
 */
#define OTBL_24		(0 << 16)
#define OTBL_22		(2 << 16)
#define OTBL_20		(4 << 16)
#define OTBL_18		(6 << 16)
#define OTBL_16		(8 << 16)


#define rsnd_mod_to_scu(_mod)	\
	container_of((_mod), struct rsnd_scu, mod)

#define for_each_rsnd_scu(pos, priv, i)					\
	for ((i) = 0;							\
	     ((i) < rsnd_scu_nr(priv)) &&				\
		     ((pos) = (struct rsnd_scu *)(priv)->scu + i);	\
	     i++)

static int rsnd_scu_set_route(struct rsnd_priv *priv,
			      struct rsnd_mod *mod,
			      struct rsnd_dai *rdai,
			      struct rsnd_dai_stream *io)
{
	struct scu_route_config {
		u32 mask;
		int shift;
	} routes[] = {
		{ 0xF,  0, }, /* 0 */
		{ 0xF,  4, }, /* 1 */
		{ 0xF,  8, }, /* 2 */
		{ 0x7, 12, }, /* 3 */
		{ 0x7, 16, }, /* 4 */
		{ 0x7, 20, }, /* 5 */
		{ 0x7, 24, }, /* 6 */
		{ 0x3, 28, }, /* 7 */
		{ 0x3, 30, }, /* 8 */
	};

	u32 mask;
	u32 val;
	int shift;
	int id;

	/*
	 * Gen1 only
	 */
	if (!rsnd_is_gen1(priv))
		return 0;

	id = rsnd_mod_id(mod);
	if (id < 0 || id >= ARRAY_SIZE(routes))
		return -EIO;

	/*
	 * SRC_ROUTE_SELECT
	 */
	val = rsnd_dai_is_play(rdai, io) ? 0x1 : 0x2;
	val = val		<< routes[id].shift;
	mask = routes[id].mask	<< routes[id].shift;

	rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val);

	/*
	 * SRC_TIMING_SELECT
	 */
	shift	= (id % 4) * 8;
	mask	= 0x1F << shift;
	if (8 == id) /* SRU8 is very special */
		val = id << shift;
	else
		val = (id + 1) << shift;

	switch (id / 4) {
	case 0:
		rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val);
		break;
	case 1:
		rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val);
		break;
	case 2:
		rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val);
		break;
	}

	return 0;
}

static int rsnd_scu_set_mode(struct rsnd_priv *priv,
			     struct rsnd_mod *mod,
			     struct rsnd_dai *rdai,
			     struct rsnd_dai_stream *io)
{
	int id = rsnd_mod_id(mod);
	u32 val;

	if (rsnd_is_gen1(priv)) {
		val = (1 << id);
		rsnd_mod_bset(mod, SRC_CTRL, val, val);
	}

	return 0;
}

static int rsnd_scu_set_hpbif(struct rsnd_priv *priv,
			      struct rsnd_mod *mod,
			      struct rsnd_dai *rdai,
			      struct rsnd_dai_stream *io)
{
	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
	u32 adinr = runtime->channels;

	switch (runtime->sample_bits) {
	case 16:
		adinr |= OTBL_16;
		break;
	case 32:
		adinr |= OTBL_24;
		break;
	default:
		return -EIO;
	}

	rsnd_mod_write(mod, BUSIF_MODE, 1);
	rsnd_mod_write(mod, BUSIF_ADINR, adinr);

	return 0;
}

bool rsnd_scu_hpbif_is_enable(struct rsnd_mod *mod)
{
	struct rsnd_scu *scu = rsnd_mod_to_scu(mod);
	u32 flags = rsnd_scu_mode_flags(scu);

	return !!(flags & RSND_SCU_USE_HPBIF);
}

static int rsnd_scu_start(struct rsnd_mod *mod,
			  struct rsnd_dai *rdai,
			  struct rsnd_dai_stream *io)
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	struct device *dev = rsnd_priv_to_dev(priv);
	int ret;

	/*
	 * SCU will be used if it has RSND_SCU_USE_HPBIF flags
	 */
	if (!rsnd_scu_hpbif_is_enable(mod)) {
		/* it use PIO transter */
		dev_dbg(dev, "%s%d is not used\n",
			rsnd_mod_name(mod), rsnd_mod_id(mod));

		return 0;
	}

	/* it use DMA transter */
	ret = rsnd_scu_set_route(priv, mod, rdai, io);
	if (ret < 0)
		return ret;

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

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

	dev_dbg(dev, "%s%d start\n", rsnd_mod_name(mod), rsnd_mod_id(mod));

	return 0;
}

static struct rsnd_mod_ops rsnd_scu_ops = {
	.name	= "scu",
	.start	= rsnd_scu_start,
};

struct rsnd_mod *rsnd_scu_mod_get(struct rsnd_priv *priv, int id)
{
	if (WARN_ON(id < 0 || id >= rsnd_scu_nr(priv)))
		id = 0;

	return &((struct rsnd_scu *)(priv->scu) + id)->mod;
}

int rsnd_scu_probe(struct platform_device *pdev,
		   struct rcar_snd_info *info,
		   struct rsnd_priv *priv)
{
	struct device *dev = rsnd_priv_to_dev(priv);
	struct rsnd_scu *scu;
	int i, nr;

	/*
	 * init SCU
	 */
	nr	= info->scu_info_nr;
	scu	= devm_kzalloc(dev, sizeof(*scu) * nr, GFP_KERNEL);
	if (!scu) {
		dev_err(dev, "SCU allocate failed\n");
		return -ENOMEM;
	}

	priv->scu_nr	= nr;
	priv->scu	= scu;

	for_each_rsnd_scu(scu, priv, i) {
		rsnd_mod_init(priv, &scu->mod,
			      &rsnd_scu_ops, i);
		scu->info = &info->scu_info[i];

		dev_dbg(dev, "SCU%d probed\n", i);
	}
	dev_dbg(dev, "scu probed\n");

	return 0;
}

void rsnd_scu_remove(struct platform_device *pdev,
		     struct rsnd_priv *priv)
{
}