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
rsnd_dvc_activation(struct rsnd_mod * mod)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
rsnd_dvc_halt(struct rsnd_mod * mod)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
rsnd_dvc_volume_parameter(struct rsnd_dai_stream * io,struct rsnd_mod * mod)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
rsnd_dvc_volume_init(struct rsnd_dai_stream * io,struct rsnd_mod * mod)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
rsnd_dvc_volume_update(struct rsnd_dai_stream * io,struct rsnd_mod * mod)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
rsnd_dvc_probe_(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)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
rsnd_dvc_init(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)185 static int rsnd_dvc_init(struct rsnd_mod *mod,
186 struct rsnd_dai_stream *io,
187 struct rsnd_priv *priv)
188 {
189 rsnd_mod_power_on(mod);
190
191 rsnd_dvc_activation(mod);
192
193 rsnd_dvc_volume_init(io, mod);
194
195 rsnd_dvc_volume_update(io, mod);
196
197 return 0;
198 }
199
rsnd_dvc_quit(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct rsnd_priv * priv)200 static int rsnd_dvc_quit(struct rsnd_mod *mod,
201 struct rsnd_dai_stream *io,
202 struct rsnd_priv *priv)
203 {
204 rsnd_dvc_halt(mod);
205
206 rsnd_mod_power_off(mod);
207
208 return 0;
209 }
210
rsnd_dvc_pcm_new(struct rsnd_mod * mod,struct rsnd_dai_stream * io,struct snd_soc_pcm_runtime * rtd)211 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
212 struct rsnd_dai_stream *io,
213 struct snd_soc_pcm_runtime *rtd)
214 {
215 struct rsnd_dvc *dvc = rsnd_mod_to_dvc(mod);
216 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
217 int is_play = rsnd_io_is_play(io);
218 int channels = rsnd_rdai_channels_get(rdai);
219 int ret;
220
221 /* Volume */
222 ret = rsnd_kctrl_new_m(mod, io, rtd,
223 is_play ?
224 "DVC Out Playback Volume" : "DVC In Capture Volume",
225 rsnd_kctrl_accept_anytime,
226 rsnd_dvc_volume_update,
227 &dvc->volume, channels,
228 0x00800000 - 1);
229 if (ret < 0)
230 return ret;
231
232 /* Mute */
233 ret = rsnd_kctrl_new_m(mod, io, rtd,
234 is_play ?
235 "DVC Out Mute Switch" : "DVC In Mute Switch",
236 rsnd_kctrl_accept_anytime,
237 rsnd_dvc_volume_update,
238 &dvc->mute, channels,
239 1);
240 if (ret < 0)
241 return ret;
242
243 /* Ramp */
244 ret = rsnd_kctrl_new_s(mod, io, rtd,
245 is_play ?
246 "DVC Out Ramp Switch" : "DVC In Ramp Switch",
247 rsnd_kctrl_accept_anytime,
248 rsnd_dvc_volume_update,
249 &dvc->ren, 1);
250 if (ret < 0)
251 return ret;
252
253 ret = rsnd_kctrl_new_e(mod, io, rtd,
254 is_play ?
255 "DVC Out Ramp Up Rate" : "DVC In Ramp Up Rate",
256 rsnd_kctrl_accept_anytime,
257 rsnd_dvc_volume_update,
258 &dvc->rup,
259 volume_ramp_rate,
260 VOLUME_RAMP_MAX_DVC);
261 if (ret < 0)
262 return ret;
263
264 ret = rsnd_kctrl_new_e(mod, io, rtd,
265 is_play ?
266 "DVC Out Ramp Down Rate" : "DVC In Ramp Down Rate",
267 rsnd_kctrl_accept_anytime,
268 rsnd_dvc_volume_update,
269 &dvc->rdown,
270 volume_ramp_rate,
271 VOLUME_RAMP_MAX_DVC);
272
273 if (ret < 0)
274 return ret;
275
276 return 0;
277 }
278
rsnd_dvc_dma_req(struct rsnd_dai_stream * io,struct rsnd_mod * mod)279 static struct dma_chan *rsnd_dvc_dma_req(struct rsnd_dai_stream *io,
280 struct rsnd_mod *mod)
281 {
282 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
283
284 return rsnd_dma_request_channel(rsnd_dvc_of_node(priv),
285 mod, "tx");
286 }
287
288 static struct rsnd_mod_ops rsnd_dvc_ops = {
289 .name = DVC_NAME,
290 .dma_req = rsnd_dvc_dma_req,
291 .probe = rsnd_dvc_probe_,
292 .init = rsnd_dvc_init,
293 .quit = rsnd_dvc_quit,
294 .pcm_new = rsnd_dvc_pcm_new,
295 .get_status = rsnd_mod_get_status,
296 };
297
rsnd_dvc_mod_get(struct rsnd_priv * priv,int id)298 struct rsnd_mod *rsnd_dvc_mod_get(struct rsnd_priv *priv, int id)
299 {
300 if (WARN_ON(id < 0 || id >= rsnd_dvc_nr(priv)))
301 id = 0;
302
303 return rsnd_mod_get(rsnd_dvc_get(priv, id));
304 }
305
rsnd_dvc_probe(struct rsnd_priv * priv)306 int rsnd_dvc_probe(struct rsnd_priv *priv)
307 {
308 struct device_node *node;
309 struct device_node *np;
310 struct device *dev = rsnd_priv_to_dev(priv);
311 struct rsnd_dvc *dvc;
312 struct clk *clk;
313 char name[RSND_DVC_NAME_SIZE];
314 int i, nr, ret;
315
316 /* This driver doesn't support Gen1 at this point */
317 if (rsnd_is_gen1(priv))
318 return 0;
319
320 node = rsnd_dvc_of_node(priv);
321 if (!node)
322 return 0; /* not used is not error */
323
324 nr = of_get_child_count(node);
325 if (!nr) {
326 ret = -EINVAL;
327 goto rsnd_dvc_probe_done;
328 }
329
330 dvc = devm_kcalloc(dev, nr, sizeof(*dvc), GFP_KERNEL);
331 if (!dvc) {
332 ret = -ENOMEM;
333 goto rsnd_dvc_probe_done;
334 }
335
336 priv->dvc_nr = nr;
337 priv->dvc = dvc;
338
339 i = 0;
340 ret = 0;
341 for_each_child_of_node(node, np) {
342 dvc = rsnd_dvc_get(priv, i);
343
344 snprintf(name, RSND_DVC_NAME_SIZE, "%s.%d",
345 DVC_NAME, i);
346
347 clk = devm_clk_get(dev, name);
348 if (IS_ERR(clk)) {
349 ret = PTR_ERR(clk);
350 of_node_put(np);
351 goto rsnd_dvc_probe_done;
352 }
353
354 ret = rsnd_mod_init(priv, rsnd_mod_get(dvc), &rsnd_dvc_ops,
355 clk, RSND_MOD_DVC, i);
356 if (ret) {
357 of_node_put(np);
358 goto rsnd_dvc_probe_done;
359 }
360
361 i++;
362 }
363
364 rsnd_dvc_probe_done:
365 of_node_put(node);
366
367 return ret;
368 }
369
rsnd_dvc_remove(struct rsnd_priv * priv)370 void rsnd_dvc_remove(struct rsnd_priv *priv)
371 {
372 struct rsnd_dvc *dvc;
373 int i;
374
375 for_each_rsnd_dvc(dvc, priv, i) {
376 rsnd_mod_quit(rsnd_mod_get(dvc));
377 }
378 }
379