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 int ret;
175
176 ret = rsnd_mod_power_on(mod);
177 if (ret < 0)
178 return ret;
179
180 rsnd_ctu_activation(mod);
181
182 rsnd_ctu_value_init(io, mod);
183
184 return 0;
185 }
186
rsnd_ctu_quit(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)187 static int rsnd_ctu_quit(struct rsnd_mod *mod,
188 struct rsnd_dai_stream *io,
189 struct rsnd_priv *priv)
190 {
191 rsnd_ctu_halt(mod);
192
193 rsnd_mod_power_off(mod);
194
195 return 0;
196 }
197
rsnd_ctu_pcm_new(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct snd_soc_pcm_runtime * rtd)198 static int rsnd_ctu_pcm_new(struct rsnd_mod *mod,
199 struct rsnd_dai_stream *io,
200 struct snd_soc_pcm_runtime *rtd)
201 {
202 struct rsnd_ctu *ctu = rsnd_mod_to_ctu(mod);
203 int ret;
204
205 if (rsnd_flags_has(ctu, KCTRL_INITIALIZED))
206 return 0;
207
208 /* CTU Pass */
209 ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU Pass",
210 rsnd_kctrl_accept_anytime,
211 NULL,
212 &ctu->pass, RSND_MAX_CHANNELS,
213 0xC);
214 if (ret < 0)
215 return ret;
216
217 /* ROW0 */
218 ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV0",
219 rsnd_kctrl_accept_anytime,
220 NULL,
221 &ctu->sv[0], RSND_MAX_CHANNELS,
222 0x00FFFFFF);
223 if (ret < 0)
224 return ret;
225
226 /* ROW1 */
227 ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV1",
228 rsnd_kctrl_accept_anytime,
229 NULL,
230 &ctu->sv[1], RSND_MAX_CHANNELS,
231 0x00FFFFFF);
232 if (ret < 0)
233 return ret;
234
235 /* ROW2 */
236 ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV2",
237 rsnd_kctrl_accept_anytime,
238 NULL,
239 &ctu->sv[2], RSND_MAX_CHANNELS,
240 0x00FFFFFF);
241 if (ret < 0)
242 return ret;
243
244 /* ROW3 */
245 ret = rsnd_kctrl_new_m(mod, io, rtd, "CTU SV3",
246 rsnd_kctrl_accept_anytime,
247 NULL,
248 &ctu->sv[3], RSND_MAX_CHANNELS,
249 0x00FFFFFF);
250 if (ret < 0)
251 return ret;
252
253 /* Reset */
254 ret = rsnd_kctrl_new_s(mod, io, rtd, "CTU Reset",
255 rsnd_kctrl_accept_anytime,
256 rsnd_ctu_value_reset,
257 &ctu->reset, 1);
258
259 rsnd_flags_set(ctu, KCTRL_INITIALIZED);
260
261 return ret;
262 }
263
rsnd_ctu_id(struct rsnd_mod * mod)264 static int rsnd_ctu_id(struct rsnd_mod *mod)
265 {
266 /*
267 * ctu00: -> 0, ctu01: -> 0, ctu02: -> 0, ctu03: -> 0
268 * ctu10: -> 1, ctu11: -> 1, ctu12: -> 1, ctu13: -> 1
269 */
270 return mod->id / 4;
271 }
272
rsnd_ctu_id_sub(struct rsnd_mod * mod)273 static int rsnd_ctu_id_sub(struct rsnd_mod *mod)
274 {
275 /*
276 * ctu00: -> 0, ctu01: -> 1, ctu02: -> 2, ctu03: -> 3
277 * ctu10: -> 0, ctu11: -> 1, ctu12: -> 2, ctu13: -> 3
278 */
279 return mod->id % 4;
280 }
281
282 #ifdef CONFIG_DEBUG_FS
rsnd_ctu_debug_info(struct seq_file * m,struct rsnd_dai_stream * io,struct rsnd_mod * mod)283 static void rsnd_ctu_debug_info(struct seq_file *m,
284 struct rsnd_dai_stream *io,
285 struct rsnd_mod *mod)
286 {
287 rsnd_debugfs_mod_reg_show(m, mod, RSND_BASE_SCU,
288 0x500 + rsnd_mod_id_raw(mod) * 0x100, 0x100);
289 }
290 #define DEBUG_INFO .debug_info = rsnd_ctu_debug_info
291 #else
292 #define DEBUG_INFO
293 #endif
294
295 static struct rsnd_mod_ops rsnd_ctu_ops = {
296 .name = CTU_NAME,
297 .probe = rsnd_ctu_probe_,
298 .init = rsnd_ctu_init,
299 .quit = rsnd_ctu_quit,
300 .pcm_new = rsnd_ctu_pcm_new,
301 .get_status = rsnd_mod_get_status,
302 .id = rsnd_ctu_id,
303 .id_sub = rsnd_ctu_id_sub,
304 .id_cmd = rsnd_mod_id_raw,
305 DEBUG_INFO
306 };
307
rsnd_ctu_mod_get(struct rsnd_priv * priv,int id)308 struct rsnd_mod *rsnd_ctu_mod_get(struct rsnd_priv *priv, int id)
309 {
310 if (WARN_ON(id < 0 || id >= rsnd_ctu_nr(priv)))
311 id = 0;
312
313 return rsnd_mod_get(rsnd_ctu_get(priv, id));
314 }
315
rsnd_ctu_probe(struct rsnd_priv * priv)316 int rsnd_ctu_probe(struct rsnd_priv *priv)
317 {
318 struct device_node *node;
319 struct device_node *np;
320 struct device *dev = rsnd_priv_to_dev(priv);
321 struct rsnd_ctu *ctu;
322 struct clk *clk;
323 char name[CTU_NAME_SIZE];
324 int i, nr, ret;
325
326 node = rsnd_ctu_of_node(priv);
327 if (!node)
328 return 0; /* not used is not error */
329
330 nr = of_get_child_count(node);
331 if (!nr) {
332 ret = -EINVAL;
333 goto rsnd_ctu_probe_done;
334 }
335
336 ctu = devm_kcalloc(dev, nr, sizeof(*ctu), GFP_KERNEL);
337 if (!ctu) {
338 ret = -ENOMEM;
339 goto rsnd_ctu_probe_done;
340 }
341
342 priv->ctu_nr = nr;
343 priv->ctu = ctu;
344
345 i = 0;
346 ret = 0;
347 for_each_child_of_node(node, np) {
348 ctu = rsnd_ctu_get(priv, i);
349
350 /*
351 * CTU00, CTU01, CTU02, CTU03 => CTU0
352 * CTU10, CTU11, CTU12, CTU13 => CTU1
353 */
354 snprintf(name, CTU_NAME_SIZE, "%s.%d",
355 CTU_NAME, i / 4);
356
357 clk = devm_clk_get(dev, name);
358 if (IS_ERR(clk)) {
359 ret = PTR_ERR(clk);
360 of_node_put(np);
361 goto rsnd_ctu_probe_done;
362 }
363
364 ret = rsnd_mod_init(priv, rsnd_mod_get(ctu), &rsnd_ctu_ops,
365 clk, RSND_MOD_CTU, i);
366 if (ret) {
367 of_node_put(np);
368 goto rsnd_ctu_probe_done;
369 }
370
371 i++;
372 }
373
374
375 rsnd_ctu_probe_done:
376 of_node_put(node);
377
378 return ret;
379 }
380
rsnd_ctu_remove(struct rsnd_priv * priv)381 void rsnd_ctu_remove(struct rsnd_priv *priv)
382 {
383 struct rsnd_ctu *ctu;
384 int i;
385
386 for_each_rsnd_ctu(ctu, priv, i) {
387 rsnd_mod_quit(rsnd_mod_get(ctu));
388 }
389 }
390