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 int i;
47
48 /*
49 * it is assuming that integrater is well understanding about
50 * data path. Here doesn't check impossible connection,
51 * like src2 + src5
52 */
53 data = 0;
54 for_each_rsnd_dai(rdai, priv, i) {
55 struct rsnd_dai_stream *tio = &rdai->playback;
56 struct rsnd_mod *src = rsnd_io_to_mod_src(tio);
57
58 if (mix == rsnd_io_to_mod_mix(tio))
59 data |= path[rsnd_mod_id(src)];
60
61 tio = &rdai->capture;
62 src = rsnd_io_to_mod_src(tio);
63 if (mix == rsnd_io_to_mod_mix(tio))
64 data |= path[rsnd_mod_id(src)];
65 }
66
67 } else {
68 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
69
70 static const u8 cmd_case[] = {
71 [0] = 0x3,
72 [1] = 0x3,
73 [2] = 0x4,
74 [3] = 0x1,
75 [4] = 0x2,
76 [5] = 0x4,
77 [6] = 0x1,
78 [9] = 0x2,
79 };
80
81 if (unlikely(!src))
82 return -EIO;
83
84 data = path[rsnd_mod_id(src)] |
85 cmd_case[rsnd_mod_id(src)] << 16;
86 }
87
88 dev_dbg(dev, "ctu/mix path = 0x%08x\n", data);
89
90 rsnd_mod_write(mod, CMD_ROUTE_SLCT, data);
91 rsnd_mod_write(mod, CMD_BUSIF_MODE, rsnd_get_busif_shift(io, mod) | 1);
92 rsnd_mod_write(mod, CMD_BUSIF_DALIGN, rsnd_get_dalign(mod, io));
93
94 rsnd_adg_set_cmd_timsel_gen2(mod, io);
95
96 return 0;
97 }
98
rsnd_cmd_start(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)99 static int rsnd_cmd_start(struct rsnd_mod *mod,
100 struct rsnd_dai_stream *io,
101 struct rsnd_priv *priv)
102 {
103 rsnd_mod_write(mod, CMD_CTRL, 0x10);
104
105 return 0;
106 }
107
rsnd_cmd_stop(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)108 static int rsnd_cmd_stop(struct rsnd_mod *mod,
109 struct rsnd_dai_stream *io,
110 struct rsnd_priv *priv)
111 {
112 rsnd_mod_write(mod, CMD_CTRL, 0);
113
114 return 0;
115 }
116
117 #ifdef CONFIG_DEBUG_FS
rsnd_cmd_debug_info(struct seq_file * m,struct rsnd_dai_stream * io,struct rsnd_mod * mod)118 static void rsnd_cmd_debug_info(struct seq_file *m,
119 struct rsnd_dai_stream *io,
120 struct rsnd_mod *mod)
121 {
122 rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SCU,
123 0x180 + rsnd_mod_id_raw(mod) * 0x20, 0x30);
124 }
125 #define DEBUG_INFO .debug_info = rsnd_cmd_debug_info
126 #else
127 #define DEBUG_INFO
128 #endif
129
130 static struct rsnd_mod_ops rsnd_cmd_ops = {
131 .name = CMD_NAME,
132 .init = rsnd_cmd_init,
133 .start = rsnd_cmd_start,
134 .stop = rsnd_cmd_stop,
135 .get_status = rsnd_mod_get_status,
136 DEBUG_INFO
137 };
138
rsnd_cmd_mod_get(struct rsnd_priv * priv,int id)139 static struct rsnd_mod *rsnd_cmd_mod_get(struct rsnd_priv *priv, int id)
140 {
141 if (WARN_ON(id < 0 || id >= rsnd_cmd_nr(priv)))
142 id = 0;
143
144 return rsnd_mod_get((struct rsnd_cmd *)(priv->cmd) + id);
145 }
rsnd_cmd_attach(struct rsnd_dai_stream * io,int id)146 int rsnd_cmd_attach(struct rsnd_dai_stream *io, int id)
147 {
148 struct rsnd_priv *priv = rsnd_io_to_priv(io);
149 struct rsnd_mod *mod = rsnd_cmd_mod_get(priv, id);
150
151 return rsnd_dai_connect(mod, io, mod->type);
152 }
153
rsnd_cmd_probe(struct rsnd_priv * priv)154 int rsnd_cmd_probe(struct rsnd_priv *priv)
155 {
156 struct device *dev = rsnd_priv_to_dev(priv);
157 struct rsnd_cmd *cmd;
158 int i, nr;
159
160 /* This driver doesn't support Gen1 at this point */
161 if (rsnd_is_gen1(priv))
162 return 0;
163
164 /* same number as DVC */
165 nr = priv->dvc_nr;
166 if (!nr)
167 return 0;
168
169 cmd = devm_kcalloc(dev, nr, sizeof(*cmd), GFP_KERNEL);
170 if (!cmd)
171 return -ENOMEM;
172
173 priv->cmd_nr = nr;
174 priv->cmd = cmd;
175
176 for_each_rsnd_cmd(cmd, priv, i) {
177 int ret = rsnd_mod_init(priv, rsnd_mod_get(cmd),
178 &rsnd_cmd_ops, NULL,
179 RSND_MOD_CMD, i);
180 if (ret)
181 return ret;
182 }
183
184 return 0;
185 }
186
rsnd_cmd_remove(struct rsnd_priv * priv)187 void rsnd_cmd_remove(struct rsnd_priv *priv)
188 {
189 struct rsnd_cmd *cmd;
190 int i;
191
192 for_each_rsnd_cmd(cmd, priv, i) {
193 rsnd_mod_quit(rsnd_mod_get(cmd));
194 }
195 }
196