1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Renesas R-Car CMD support
4 //
5 // Copyright (C) 2015 Renesas Solutions Corp.
6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7
8 #include "rsnd.h"
9
10 struct rsnd_cmd {
11 struct rsnd_mod mod;
12 };
13
14 #define CMD_NAME "cmd"
15
16 #define rsnd_cmd_nr(priv) ((priv)->cmd_nr)
17 #define for_each_rsnd_cmd(pos, priv, i) \
18 for ((i) = 0; \
19 ((i) < rsnd_cmd_nr(priv)) && \
20 ((pos) = (struct rsnd_cmd *)(priv)->cmd + i); \
21 i++)
22
rsnd_cmd_init(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)23 static int rsnd_cmd_init(struct rsnd_mod *mod,
24 struct rsnd_dai_stream *io,
25 struct rsnd_priv *priv)
26 {
27 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
28 struct rsnd_mod *mix = rsnd_io_to_mod_mix(io);
29 struct device *dev = rsnd_priv_to_dev(priv);
30 u32 data;
31 static const u32 path[] = {
32 [1] = 1 << 0,
33 [5] = 1 << 8,
34 [6] = 1 << 12,
35 [9] = 1 << 15,
36 };
37
38 if (!mix && !dvc)
39 return 0;
40
41 if (ARRAY_SIZE(path) < rsnd_mod_id(mod) + 1)
42 return -ENXIO;
43
44 if (mix) {
45 struct rsnd_dai *rdai;
46 struct rsnd_mod *src;
47 struct rsnd_dai_stream *tio;
48 int i;
49
50 /*
51 * it is assuming that integrater is well understanding about
52 * data path. Here doesn't check impossible connection,
53 * like src2 + src5
54 */
55 data = 0;
56 for_each_rsnd_dai(rdai, priv, i) {
57 tio = &rdai->playback;
58 src = rsnd_io_to_mod_src(tio);
59 if (mix == rsnd_io_to_mod_mix(tio))
60 data |= path[rsnd_mod_id(src)];
61
62 tio = &rdai->capture;
63 src = rsnd_io_to_mod_src(tio);
64 if (mix == rsnd_io_to_mod_mix(tio))
65 data |= path[rsnd_mod_id(src)];
66 }
67
68 } else {
69 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
70
71 static const u8 cmd_case[] = {
72 [0] = 0x3,
73 [1] = 0x3,
74 [2] = 0x4,
75 [3] = 0x1,
76 [4] = 0x2,
77 [5] = 0x4,
78 [6] = 0x1,
79 [9] = 0x2,
80 };
81
82 if (unlikely(!src))
83 return -EIO;
84
85 data = path[rsnd_mod_id(src)] |
86 cmd_case[rsnd_mod_id(src)] << 16;
87 }
88
89 dev_dbg(dev, "ctu/mix path = 0x%08x\n", data);
90
91 rsnd_mod_write(mod, CMD_ROUTE_SLCT, data);
92 rsnd_mod_write(mod, CMD_BUSIF_MODE, rsnd_get_busif_shift(io, mod) | 1);
93 rsnd_mod_write(mod, CMD_BUSIF_DALIGN, rsnd_get_dalign(mod, io));
94
95 rsnd_adg_set_cmd_timsel_gen2(mod, io);
96
97 return 0;
98 }
99
rsnd_cmd_start(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)100 static int rsnd_cmd_start(struct rsnd_mod *mod,
101 struct rsnd_dai_stream *io,
102 struct rsnd_priv *priv)
103 {
104 rsnd_mod_write(mod, CMD_CTRL, 0x10);
105
106 return 0;
107 }
108
rsnd_cmd_stop(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)109 static int rsnd_cmd_stop(struct rsnd_mod *mod,
110 struct rsnd_dai_stream *io,
111 struct rsnd_priv *priv)
112 {
113 rsnd_mod_write(mod, CMD_CTRL, 0);
114
115 return 0;
116 }
117
118 static struct rsnd_mod_ops rsnd_cmd_ops = {
119 .name = CMD_NAME,
120 .init = rsnd_cmd_init,
121 .start = rsnd_cmd_start,
122 .stop = rsnd_cmd_stop,
123 .get_status = rsnd_mod_get_status,
124 };
125
rsnd_cmd_mod_get(struct rsnd_priv * priv,int id)126 static struct rsnd_mod *rsnd_cmd_mod_get(struct rsnd_priv *priv, int id)
127 {
128 if (WARN_ON(id < 0 || id >= rsnd_cmd_nr(priv)))
129 id = 0;
130
131 return rsnd_mod_get((struct rsnd_cmd *)(priv->cmd) + id);
132 }
rsnd_cmd_attach(struct rsnd_dai_stream * io,int id)133 int rsnd_cmd_attach(struct rsnd_dai_stream *io, int id)
134 {
135 struct rsnd_priv *priv = rsnd_io_to_priv(io);
136 struct rsnd_mod *mod = rsnd_cmd_mod_get(priv, id);
137
138 return rsnd_dai_connect(mod, io, mod->type);
139 }
140
rsnd_cmd_probe(struct rsnd_priv * priv)141 int rsnd_cmd_probe(struct rsnd_priv *priv)
142 {
143 struct device *dev = rsnd_priv_to_dev(priv);
144 struct rsnd_cmd *cmd;
145 int i, nr, ret;
146
147 /* This driver doesn't support Gen1 at this point */
148 if (rsnd_is_gen1(priv))
149 return 0;
150
151 /* same number as DVC */
152 nr = priv->dvc_nr;
153 if (!nr)
154 return 0;
155
156 cmd = devm_kcalloc(dev, nr, sizeof(*cmd), GFP_KERNEL);
157 if (!cmd)
158 return -ENOMEM;
159
160 priv->cmd_nr = nr;
161 priv->cmd = cmd;
162
163 for_each_rsnd_cmd(cmd, priv, i) {
164 ret = rsnd_mod_init(priv, rsnd_mod_get(cmd),
165 &rsnd_cmd_ops, NULL,
166 RSND_MOD_CMD, i);
167 if (ret)
168 return ret;
169 }
170
171 return 0;
172 }
173
rsnd_cmd_remove(struct rsnd_priv * priv)174 void rsnd_cmd_remove(struct rsnd_priv *priv)
175 {
176 struct rsnd_cmd *cmd;
177 int i;
178
179 for_each_rsnd_cmd(cmd, priv, i) {
180 rsnd_mod_quit(rsnd_mod_get(cmd));
181 }
182 }
183
