1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Renesas R-Car DVC support
4 //
5 // Copyright (C) 2014 Renesas Solutions Corp.
6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7
8 /*
9 * Playback Volume
10 * amixer set "DVC Out" 100%
11 *
12 * Capture Volume
13 * amixer set "DVC In" 100%
14 *
15 * Playback Mute
16 * amixer set "DVC Out Mute" on
17 *
18 * Capture Mute
19 * amixer set "DVC In Mute" on
20 *
21 * Volume Ramp
22 * amixer set "DVC Out Ramp Up Rate" "0.125 dB/64 steps"
23 * amixer set "DVC Out Ramp Down Rate" "0.125 dB/512 steps"
24 * amixer set "DVC Out Ramp" on
25 * aplay xxx.wav &
26 * amixer set "DVC Out" 80% // Volume Down
27 * amixer set "DVC Out" 100% // Volume Up
28 */
29
30 #include "rsnd.h"
31
32 #define RSND_DVC_NAME_SIZE 16
33
34 #define DVC_NAME "dvc"
35
36 struct rsnd_dvc {
37 struct rsnd_mod mod;
38 struct rsnd_kctrl_cfg_m volume;
39 struct rsnd_kctrl_cfg_m mute;
40 struct rsnd_kctrl_cfg_s ren; /* Ramp Enable */
41 struct rsnd_kctrl_cfg_s rup; /* Ramp Rate Up */
42 struct rsnd_kctrl_cfg_s rdown; /* Ramp Rate Down */
43 };
44
45 #define rsnd_dvc_get(priv, id) ((struct rsnd_dvc *)(priv->dvc) + id)
46 #define rsnd_dvc_nr(priv) ((priv)->dvc_nr)
47
48 #define rsnd_mod_to_dvc(_mod) \
49 container_of((_mod), struct rsnd_dvc, mod)
50
51 #define for_each_rsnd_dvc(pos, priv, i) \
52 for ((i) = 0; \
53 ((i) < rsnd_dvc_nr(priv)) && \
54 ((pos) = (struct rsnd_dvc *)(priv)->dvc + i); \
55 i++)
56
57 static void rsnd_dvc_activation(struct rsnd_mod *mod)
58 {
59 rsnd_mod_write(mod, DVC_SWRSR, 0);
60 rsnd_mod_write(mod, DVC_SWRSR, 1);
61 }
62
63 static void rsnd_dvc_halt(struct rsnd_mod *mod)
64 {
65 rsnd_mod_write(mod, DVC_DVUIR, 1);
66 rsnd_mod_write(mod, DVC_SWRSR, 0);
67 }
68
69 #define rsnd_dvc_get_vrpdr(dvc) (rsnd_kctrl_vals(dvc->rup) << 8 | \
70 rsnd_kctrl_vals(dvc->rdown))
71 #define rsnd_dvc_get_vrdbr(dvc) (0x3ff - (rsnd_kctrl_valm(dvc->volume, 0) >> 13))
72
73 static void rsnd_dvc_volume_parameter(struct rsnd_dai_stream *io,
74 struct rsnd_mod *mod)
75 {
76 struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
77 u32 val[RSND_MAX_CHANNELS];
78 int i;
79
80 /* Enable Ramp */
81 if (rsnd_kctrl_vals(dvc->ren))
82 for (i = 0; i < RSND_MAX_CHANNELS; i++)
83 val[i] = rsnd_kctrl_max(dvc->volume);
84 else
85 for (i = 0; i < RSND_MAX_CHANNELS; i++)
86 val[i] = rsnd_kctrl_valm(dvc->volume, i);
87
88 /* Enable Digital Volume */
89 for (i = 0; i < RSND_MAX_CHANNELS; i++)
90 rsnd_mod_write(mod, DVC_VOLxR(i), val[i]);
91 }
92
93 static void rsnd_dvc_volume_init(struct rsnd_dai_stream *io,
94 struct rsnd_mod *mod)
95 {
96 struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
97 u32 adinr = 0;
98 u32 dvucr = 0;
99 u32 vrctr = 0;
100 u32 vrpdr = 0;
101 u32 vrdbr = 0;
102
103 adinr = rsnd_get_adinr_bit(mod, io) |
104 rsnd_runtime_channel_after_ctu(io);
105
106 /* Enable Digital Volume, Zero Cross Mute Mode */
107 dvucr |= 0x101;
108
109 /* Enable Ramp */
110 if (rsnd_kctrl_vals(dvc->ren)) {
111 dvucr |= 0x10;
112
113 /*
114 * FIXME !!
115 * use scale-downed Digital Volume
116 * as Volume Ramp
117 * 7F FFFF -> 3FF
118 */
119 vrctr = 0xff;
120 vrpdr = rsnd_dvc_get_vrpdr(dvc);
121 vrdbr = rsnd_dvc_get_vrdbr(dvc);
122 }
123
124 /* Initialize operation */
125 rsnd_mod_write(mod, DVC_DVUIR, 1);
126
127 /* General Information */
128 rsnd_mod_write(mod, DVC_ADINR, adinr);
129 rsnd_mod_write(mod, DVC_DVUCR, dvucr);
130
131 /* Volume Ramp Parameter */
132 rsnd_mod_write(mod, DVC_VRCTR, vrctr);
133 rsnd_mod_write(mod, DVC_VRPDR, vrpdr);
134 rsnd_mod_write(mod, DVC_VRDBR, vrdbr);
135
136 /* Digital Volume Function Parameter */
137 rsnd_dvc_volume_parameter(io, mod);
138
139 /* cancel operation */
140 rsnd_mod_write(mod, DVC_DVUIR, 0);
141 }
142
143 static void rsnd_dvc_volume_update(struct rsnd_dai_stream *io,
144 struct rsnd_mod *mod)
145 {
146 struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
147 u32 zcmcr = 0;
148 u32 vrpdr = 0;
149 u32 vrdbr = 0;
150 int i;
151
152 for (i = 0; i < rsnd_kctrl_size(dvc->mute); i++)
153 zcmcr |= (!!rsnd_kctrl_valm(dvc->mute, i)) << i;
154
155 if (rsnd_kctrl_vals(dvc->ren)) {
156 vrpdr = rsnd_dvc_get_vrpdr(dvc);
157 vrdbr = rsnd_dvc_get_vrdbr(dvc);
158 }
159
160 /* Disable DVC Register access */
161 rsnd_mod_write(mod, DVC_DVUER, 0);
162
163 /* Zero Cross Mute Function */
164 rsnd_mod_write(mod, DVC_ZCMCR, zcmcr);
165
166 /* Volume Ramp Function */
167 rsnd_mod_write(mod, DVC_VRPDR, vrpdr);
168 rsnd_mod_write(mod, DVC_VRDBR, vrdbr);
169 /* add DVC_VRWTR here */
170
171 /* Digital Volume Function Parameter */
172 rsnd_dvc_volume_parameter(io, mod);
173
174 /* Enable DVC Register access */
175 rsnd_mod_write(mod, DVC_DVUER, 1);
176 }
177
178 static int rsnd_dvc_probe_(struct rsnd_mod *mod,
179 struct rsnd_dai_stream *io,
180 struct rsnd_priv *priv)
181 {
182 return rsnd_cmd_attach(io, rsnd_mod_id(mod));
183 }
184
185 static int rsnd_dvc_init(struct rsnd_mod *mod,
186 struct rsnd_dai_stream *io,
187 struct rsnd_priv *priv)
188 {
189 int ret;
190
191 ret = rsnd_mod_power_on(mod);
192 if (ret < 0)
193 return ret;
194
195 rsnd_dvc_activation(mod);
196
197 rsnd_dvc_volume_init(io, mod);
198
199 rsnd_dvc_volume_update(io, mod);
200
201 return 0;
202 }
203
204 static int rsnd_dvc_quit(struct rsnd_mod *mod,
205 struct rsnd_dai_stream *io,
206 struct rsnd_priv *priv)
207 {
208 rsnd_dvc_halt(mod);
209
210 rsnd_mod_power_off(mod);
211
212 return 0;
213 }
214
215 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
216 struct rsnd_dai_stream *io,
217 struct snd_soc_pcm_runtime *rtd)
218 {
219 struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
220 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
221 int is_play = rsnd_io_is_play(io);
222 int channels = rsnd_rdai_channels_get(rdai);
223 int ret;
224
225 /* Volume */
226 ret = rsnd_kctrl_new_m(mod, io, rtd,
227 is_play ?
228 "DVC Out Playback Volume" : "DVC In Capture Volume",
229 rsnd_kctrl_accept_anytime,
230 rsnd_dvc_volume_update,
231 &dvc->volume, channels,
232 0x00800000 - 1);
233 if (ret < 0)
234 return ret;
235
236 /* Mute */
237 ret = rsnd_kctrl_new_m(mod, io, rtd,
238 is_play ?
239 "DVC Out Mute Switch" : "DVC In Mute Switch",
240 rsnd_kctrl_accept_anytime,
241 rsnd_dvc_volume_update,
242 &dvc->mute, channels,
243 1);
244 if (ret < 0)
245 return ret;
246
247 /* Ramp */
248 ret = rsnd_kctrl_new_s(mod, io, rtd,
249 is_play ?
250 "DVC Out Ramp Switch" : "DVC In Ramp Switch",
251 rsnd_kctrl_accept_anytime,
252 rsnd_dvc_volume_update,
253 &dvc->ren, 1);
254 if (ret < 0)
255 return ret;
256
257 ret = rsnd_kctrl_new_e(mod, io, rtd,
258 is_play ?
259 "DVC Out Ramp Up Rate" : "DVC In Ramp Up Rate",
260 rsnd_kctrl_accept_anytime,
261 rsnd_dvc_volume_update,
262 &dvc->rup,
263 volume_ramp_rate,
264 VOLUME_RAMP_MAX_DVC);
265 if (ret < 0)
266 return ret;
267
268 ret = rsnd_kctrl_new_e(mod, io, rtd,
269 is_play ?
270 "DVC Out Ramp Down Rate" : "DVC In Ramp Down Rate",
271 rsnd_kctrl_accept_anytime,
272 rsnd_dvc_volume_update,
273 &dvc->rdown,
274 volume_ramp_rate,
275 VOLUME_RAMP_MAX_DVC);
276
277 if (ret < 0)
278 return ret;
279
280 return 0;
281 }
282
283 static struct dma_chan *rsnd_dvc_dma_req(struct rsnd_dai_stream *io,
284 struct rsnd_mod *mod)
285 {
286 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
287
288 return rsnd_dma_request_channel(rsnd_dvc_of_node(priv),
289 DVC_NAME, mod, "tx");
290 }
291
292 #ifdef CONFIG_DEBUG_FS
293 static void rsnd_dvc_debug_info(struct seq_file *m,
294 struct rsnd_dai_stream *io,
295 struct rsnd_mod *mod)
296 {
297 rsnd_debugfs_mod_reg_show(m, mod, RSND_BASE_SCU,
298 0xe00 + rsnd_mod_id(mod) * 0x100, 0x60);
299 }
300 #define DEBUG_INFO .debug_info = rsnd_dvc_debug_info
301 #else
302 #define DEBUG_INFO
303 #endif
304
305 static struct rsnd_mod_ops rsnd_dvc_ops = {
306 .name = DVC_NAME,
307 .dma_req = rsnd_dvc_dma_req,
308 .probe = rsnd_dvc_probe_,
309 .init = rsnd_dvc_init,
310 .quit = rsnd_dvc_quit,
311 .pcm_new = rsnd_dvc_pcm_new,
312 .get_status = rsnd_mod_get_status,
313 DEBUG_INFO
314 };
315
316 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
317 {
318 if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
319 id = 0;
320
321 return rsnd_mod_get(rsnd_dvc_get(priv, id));
322 }
323
324 int rsnd_dvc_probe(struct rsnd_priv *priv)
325 {
326 struct device_node *node;
327 struct device_node *np;
328 struct device *dev = rsnd_priv_to_dev(priv);
329 struct rsnd_dvc *dvc;
330 struct clk *clk;
331 char name[RSND_DVC_NAME_SIZE];
332 int i, nr, ret;
333
334 node = rsnd_dvc_of_node(priv);
335 if (!node)
336 return 0; /* not used is not error */
337
338 nr = of_get_child_count(node);
339 if (!nr) {
340 ret = -EINVAL;
341 goto rsnd_dvc_probe_done;
342 }
343
344 dvc = devm_kcalloc(dev, nr, sizeof(*dvc), GFP_KERNEL);
345 if (!dvc) {
346 ret = -ENOMEM;
347 goto rsnd_dvc_probe_done;
348 }
349
350 priv->dvc_nr = nr;
351 priv->dvc = dvc;
352
353 i = 0;
354 ret = 0;
355 for_each_child_of_node(node, np) {
356 dvc = rsnd_dvc_get(priv, i);
357
358 snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
359 DVC_NAME, i);
360
361 clk = devm_clk_get(dev, name);
362 if (IS_ERR(clk)) {
363 ret = PTR_ERR(clk);
364 of_node_put(np);
365 goto rsnd_dvc_probe_done;
366 }
367
368 ret = rsnd_mod_init(priv, rsnd_mod_get(dvc), &rsnd_dvc_ops,
369 clk, RSND_MOD_DVC, i);
370 if (ret) {
371 of_node_put(np);
372 goto rsnd_dvc_probe_done;
373 }
374
375 i++;
376 }
377
378 rsnd_dvc_probe_done:
379 of_node_put(node);
380
381 return ret;
382 }
383
384 void rsnd_dvc_remove(struct rsnd_priv *priv)
385 {
386 struct rsnd_dvc *dvc;
387 int i;
388
389 for_each_rsnd_dvc(dvc, priv, i) {
390 rsnd_mod_quit(rsnd_mod_get(dvc));
391 }
392 }
393
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