1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // ctu.c
4 //
5 // Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6
7 #include "rsnd.h"
8
9 #define CTU_NAME_SIZE 16
10 #define CTU_NAME "ctu"
11
12 /*
13 * User needs to setup CTU by amixer, and its settings are
14 * based on below registers
15 *
16 * CTUn_CPMDR : amixser set "CTU Pass"
17 * CTUn_SV0xR : amixser set "CTU SV0"
18 * CTUn_SV1xR : amixser set "CTU SV1"
19 * CTUn_SV2xR : amixser set "CTU SV2"
20 * CTUn_SV3xR : amixser set "CTU SV3"
21 *
22 * [CTU Pass]
23 * 0000: default
24 * 0001: Connect input data of channel 0
25 * 0010: Connect input data of channel 1
26 * 0011: Connect input data of channel 2
27 * 0100: Connect input data of channel 3
28 * 0101: Connect input data of channel 4
29 * 0110: Connect input data of channel 5
30 * 0111: Connect input data of channel 6
31 * 1000: Connect input data of channel 7
32 * 1001: Connect calculated data by scale values of matrix row 0
33 * 1010: Connect calculated data by scale values of matrix row 1
34 * 1011: Connect calculated data by scale values of matrix row 2
35 * 1100: Connect calculated data by scale values of matrix row 3
36 *
37 * [CTU SVx]
38 * [Output0] = [SV00, SV01, SV02, SV03, SV04, SV05, SV06, SV07]
39 * [Output1] = [SV10, SV11, SV12, SV13, SV14, SV15, SV16, SV17]
40 * [Output2] = [SV20, SV21, SV22, SV23, SV24, SV25, SV26, SV27]
41 * [Output3] = [SV30, SV31, SV32, SV33, SV34, SV35, SV36, SV37]
42 * [Output4] = [ 0, 0, 0, 0, 0, 0, 0, 0 ]
43 * [Output5] = [ 0, 0, 0, 0, 0, 0, 0, 0 ]
44 * [Output6] = [ 0, 0, 0, 0, 0, 0, 0, 0 ]
45 * [Output7] = [ 0, 0, 0, 0, 0, 0, 0, 0 ]
46 *
47 * [SVxx]
48 * Plus Minus
49 * value time dB value time dB
50 * -----------------------------------------------------------------------
51 * H'7F_FFFF 2 6 H'80_0000 2 6
52 * ...
53 * H'40_0000 1 0 H'C0_0000 1 0
54 * ...
55 * H'00_0001 2.38 x 10^-7 -132
56 * H'00_0000 0 Mute H'FF_FFFF 2.38 x 10^-7 -132
57 *
58 *
59 * Ex) Input ch -> Output ch
60 * 1ch -> 0ch
61 * 0ch -> 1ch
62 *
63 * amixer set "CTU Reset" on
64 * amixer set "CTU Pass" 9,10
65 * amixer set "CTU SV0" 0,4194304
66 * amixer set "CTU SV1" 4194304,0
67 * or
68 * amixer set "CTU Reset" on
69 * amixer set "CTU Pass" 2,1
70 */
71
72 struct rsnd_ctu {
73 struct rsnd_mod mod;
74 struct rsnd_kctrl_cfg_m pass;
75 struct rsnd_kctrl_cfg_m sv[4];
76 struct rsnd_kctrl_cfg_s reset;
77 int channels;
78 u32 flags;
79 };
80
81 #define KCTRL_INITIALIZED (1 << 0)
82
83 #define rsnd_ctu_nr(priv) ((priv)->ctu_nr)
84 #define for_each_rsnd_ctu(pos, priv, i) \
85 for ((i) = 0; \
86 ((i) < rsnd_ctu_nr(priv)) && \
87 ((pos) = (struct rsnd_ctu *)(priv)->ctu + i); \
88 i++)
89
90 #define rsnd_mod_to_ctu(_mod) \
91 container_of((_mod), struct rsnd_ctu, mod)
92
93 #define rsnd_ctu_get(priv, id) ((struct rsnd_ctu *)(priv->ctu) + id)
94
rsnd_ctu_activation(struct rsnd_mod * mod)95 static void rsnd_ctu_activation(struct rsnd_mod *mod)
96 {
97 rsnd_mod_write(mod, CTU_SWRSR, 0);
98 rsnd_mod_write(mod, CTU_SWRSR, 1);
99 }
100
rsnd_ctu_halt(struct rsnd_mod * mod)101 static void rsnd_ctu_halt(struct rsnd_mod *mod)
102 {
103 rsnd_mod_write(mod, CTU_CTUIR, 1);
104 rsnd_mod_write(mod, CTU_SWRSR, 0);
105 }
106
rsnd_ctu_probe_(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)107 static int rsnd_ctu_probe_(struct rsnd_mod *mod,
108 struct rsnd_dai_stream *io,
109 struct rsnd_priv *priv)
110 {
111 return rsnd_cmd_attach(io, rsnd_mod_id(mod));
112 }
113
rsnd_ctu_value_init(struct rsnd_dai_stream * io,struct rsnd_mod * mod)114 static void rsnd_ctu_value_init(struct rsnd_dai_stream *io,
115 struct rsnd_mod *mod)
116 {
117 struct rsnd_ctu *ctu = rsnd_mod_to_ctu(mod);
118 u32 cpmdr = 0;
119 u32 scmdr = 0;
120 int i, j;
121
122 for (i = 0; i < RSND_MAX_CHANNELS; i++) {
123 u32 val = rsnd_kctrl_valm(ctu->pass, i);
124
125 cpmdr |= val << (28 - (i * 4));
126
127 if ((val > 0x8) && (scmdr < (val - 0x8)))
128 scmdr = val - 0x8;
129 }
130
131 rsnd_mod_write(mod, CTU_CTUIR, 1);
132
133 rsnd_mod_write(mod, CTU_ADINR, rsnd_runtime_channel_original(io));
134
135 rsnd_mod_write(mod, CTU_CPMDR, cpmdr);
136
137 rsnd_mod_write(mod, CTU_SCMDR, scmdr);
138
139 for (i = 0; i < 4; i++) {
140
141 if (i >= scmdr)
142 break;
143
144 for (j = 0; j < RSND_MAX_CHANNELS; j++)
145 rsnd_mod_write(mod, CTU_SVxxR(i, j), rsnd_kctrl_valm(ctu->sv[i], j));
146 }
147
148 rsnd_mod_write(mod, CTU_CTUIR, 0);
149 }
150
rsnd_ctu_value_reset(struct rsnd_dai_stream * io,struct rsnd_mod * mod)151 static void rsnd_ctu_value_reset(struct rsnd_dai_stream *io,
152 struct rsnd_mod *mod)
153 {
154 struct rsnd_ctu *ctu = rsnd_mod_to_ctu(mod);
155 int i;
156
157 if (!rsnd_kctrl_vals(ctu->reset))
158 return;
159
160 for (i = 0; i < RSND_MAX_CHANNELS; i++) {
161 rsnd_kctrl_valm(ctu->pass, i) = 0;
162 rsnd_kctrl_valm(ctu->sv[0], i) = 0;
163 rsnd_kctrl_valm(ctu->sv[1], i) = 0;
164 rsnd_kctrl_valm(ctu->sv[2], i) = 0;
165 rsnd_kctrl_valm(ctu->sv[3], i) = 0;
166 }
167 rsnd_kctrl_vals(ctu->reset) = 0;
168 }
169
rsnd_ctu_init(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)170 static int rsnd_ctu_init(struct rsnd_mod *mod,
171 struct rsnd_dai_stream *io,
172 struct rsnd_priv *priv)
173 {
174 rsnd_mod_power_on(mod);
175
176 rsnd_ctu_activation(mod);
177
178 rsnd_ctu_value_init(io, mod);
179
180 return 0;
181 }
182
rsnd_ctu_quit(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)183 static int rsnd_ctu_quit(struct rsnd_mod *mod,
184 struct rsnd_dai_stream *io,
185 struct rsnd_priv *priv)
186 {
187 rsnd_ctu_halt(mod);
188
189 rsnd_mod_power_off(mod);
190
191 return 0;
192 }
193
rsnd_ctu_pcm_new(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct snd_soc_pcm_runtime * rtd)194 static int rsnd_ctu_pcm_new(struct rsnd_mod *mod,
195 struct rsnd_dai_stream *io,
196 struct snd_soc_pcm_runtime *rtd)
197 {
198 struct rsnd_ctu *ctu = rsnd_mod_to_ctu(mod);
199 int ret;
200
201 if (rsnd_flags_has(ctu, KCTRL_INITIALIZED))
202 return 0;
203
204 /* CTU Pass */
205 ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU Pass",
206 rsnd_kctrl_accept_anytime,
207 NULL,
208 &ctu->pass, RSND_MAX_CHANNELS,
209 0xC);
210
211 /* ROW0 */
212 ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV0",
213 rsnd_kctrl_accept_anytime,
214 NULL,
215 &ctu->sv[0], RSND_MAX_CHANNELS,
216 0x00FFFFFF);
217 if (ret < 0)
218 return ret;
219
220 /* ROW1 */
221 ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV1",
222 rsnd_kctrl_accept_anytime,
223 NULL,
224 &ctu->sv[1], RSND_MAX_CHANNELS,
225 0x00FFFFFF);
226 if (ret < 0)
227 return ret;
228
229 /* ROW2 */
230 ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV2",
231 rsnd_kctrl_accept_anytime,
232 NULL,
233 &ctu->sv[2], RSND_MAX_CHANNELS,
234 0x00FFFFFF);
235 if (ret < 0)
236 return ret;
237
238 /* ROW3 */
239 ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV3",
240 rsnd_kctrl_accept_anytime,
241 NULL,
242 &ctu->sv[3], RSND_MAX_CHANNELS,
243 0x00FFFFFF);
244 if (ret < 0)
245 return ret;
246
247 /* Reset */
248 ret = rsnd_kctrl_new_s(mod, io, rtd, "CTU Reset",
249 rsnd_kctrl_accept_anytime,
250 rsnd_ctu_value_reset,
251 &ctu->reset, 1);
252
253 rsnd_flags_set(ctu, KCTRL_INITIALIZED);
254
255 return ret;
256 }
257
rsnd_ctu_id(struct rsnd_mod * mod)258 static int rsnd_ctu_id(struct rsnd_mod *mod)
259 {
260 /*
261 * ctu00: -> 0, ctu01: -> 0, ctu02: -> 0, ctu03: -> 0
262 * ctu10: -> 1, ctu11: -> 1, ctu12: -> 1, ctu13: -> 1
263 */
264 return mod->id / 4;
265 }
266
rsnd_ctu_id_sub(struct rsnd_mod * mod)267 static int rsnd_ctu_id_sub(struct rsnd_mod *mod)
268 {
269 /*
270 * ctu00: -> 0, ctu01: -> 1, ctu02: -> 2, ctu03: -> 3
271 * ctu10: -> 0, ctu11: -> 1, ctu12: -> 2, ctu13: -> 3
272 */
273 return mod->id % 4;
274 }
275
276 static struct rsnd_mod_ops rsnd_ctu_ops = {
277 .name = CTU_NAME,
278 .probe = rsnd_ctu_probe_,
279 .init = rsnd_ctu_init,
280 .quit = rsnd_ctu_quit,
281 .pcm_new = rsnd_ctu_pcm_new,
282 .get_status = rsnd_mod_get_status,
283 .id = rsnd_ctu_id,
284 .id_sub = rsnd_ctu_id_sub,
285 .id_cmd = rsnd_mod_id_raw,
286 };
287
rsnd_ctu_mod_get(struct rsnd_priv * priv,int id)288 struct rsnd_mod *rsnd_ctu_mod_get(struct rsnd_priv *priv, int id)
289 {
290 if (WARN_ON(id < 0 || id >= rsnd_ctu_nr(priv)))
291 id = 0;
292
293 return rsnd_mod_get(rsnd_ctu_get(priv, id));
294 }
295
rsnd_ctu_probe(struct rsnd_priv * priv)296 int rsnd_ctu_probe(struct rsnd_priv *priv)
297 {
298 struct device_node *node;
299 struct device_node *np;
300 struct device *dev = rsnd_priv_to_dev(priv);
301 struct rsnd_ctu *ctu;
302 struct clk *clk;
303 char name[CTU_NAME_SIZE];
304 int i, nr, ret;
305
306 /* This driver doesn't support Gen1 at this point */
307 if (rsnd_is_gen1(priv))
308 return 0;
309
310 node = rsnd_ctu_of_node(priv);
311 if (!node)
312 return 0; /* not used is not error */
313
314 nr = of_get_child_count(node);
315 if (!nr) {
316 ret = -EINVAL;
317 goto rsnd_ctu_probe_done;
318 }
319
320 ctu = devm_kcalloc(dev, nr, sizeof(*ctu), GFP_KERNEL);
321 if (!ctu) {
322 ret = -ENOMEM;
323 goto rsnd_ctu_probe_done;
324 }
325
326 priv->ctu_nr = nr;
327 priv->ctu = ctu;
328
329 i = 0;
330 ret = 0;
331 for_each_child_of_node(node, np) {
332 ctu = rsnd_ctu_get(priv, i);
333
334 /*
335 * CTU00, CTU01, CTU02, CTU03 => CTU0
336 * CTU10, CTU11, CTU12, CTU13 => CTU1
337 */
338 snprintf(name, CTU_NAME_SIZE, "%s.%d",
339 CTU_NAME, i / 4);
340
341 clk = devm_clk_get(dev, name);
342 if (IS_ERR(clk)) {
343 ret = PTR_ERR(clk);
344 of_node_put(np);
345 goto rsnd_ctu_probe_done;
346 }
347
348 ret = rsnd_mod_init(priv, rsnd_mod_get(ctu), &rsnd_ctu_ops,
349 clk, RSND_MOD_CTU, i);
350 if (ret) {
351 of_node_put(np);
352 goto rsnd_ctu_probe_done;
353 }
354
355 i++;
356 }
357
358
359 rsnd_ctu_probe_done:
360 of_node_put(node);
361
362 return ret;
363 }
364
rsnd_ctu_remove(struct rsnd_priv * priv)365 void rsnd_ctu_remove(struct rsnd_priv *priv)
366 {
367 struct rsnd_ctu *ctu;
368 int i;
369
370 for_each_rsnd_ctu(ctu, priv, i) {
371 rsnd_mod_quit(rsnd_mod_get(ctu));
372 }
373 }
374
